A building management system for a building including one or more storage devices storing instructions thereon that, when executed by one or more processors, cause the one or more processors to ingest event information from at least one of a building system or an external computing system, enrich the event information based on a digital twin associated with the event information, wherein enriching the event information includes adding contextual information to the event information based on the digital twin to generate enriched event information, generate a predicted parameter that will result from a control decision for operating at least one of the building system or a different building system based on the enriched event information, and modify the control decision based on the predicted parameter.
G05B 17/02 - Systems involving the use of models or simulators of said systems electric
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control (DNC), flexible manufacturing systems (FMS), integrated manufacturing systems (IMS), computer integrated manufacturing (CIM)
H04L 12/28 - Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
2.
BUILDING CONTROL SYSTEM WITH PREDICTIVE CONTROL OF CARBON EMISSIONS USING MARGINAL OPERATING EMISSIONS RATE
A cascaded control system for coordinating and controlling carbon emissions associated with operating building equipment distributed across a plurality of subsystems includes a first controller configured to generate carbon emissions targets for each of a plurality of subsystems using a predictive control process that accounts for an aggregate carbon emissions of the plurality of subsystems predicted to result from the carbon emissions targets. The cascaded control system also includes a plurality of second controllers, each corresponding to one of the plurality of subsystems and configured to generate control decisions for building equipment of the corresponding subsystem that are predicted to cause the building equipment to achieve the carbon emissions targets for the corresponding subsystem; and operate the building equipment of the corresponding subsystem using the control decisions.
JOHNSON CONTROLS AIR CONDITIONING AND REFRIGERATION (WUXI) CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Borisov, Konstantin Alex
Warriner, Jonpaul
Ogale, Anuradha Girish
Jiang, Chenyi
Lu, Fei
Abstract
ADAPTIVE LOGIC BOARD FOR VARIABLE SPEED DRIVE An adaptive logic board (100) for a variable speed drive (52), VSD, of a heating, ventilation, air conditioning, and refrigeration, HVAC&R, system includes a signal sensing circuit (154) configured to receive an input signal from a sensor (120, 130) of the VSD. The signal sensing circuit includes a filter (190) configured to condition the input signal. The filter includes a variable resistance element (184) configured to adjust a cutoff frequency of the filter. The filter is configured to attenuate waveforms in the input signal having frequencies that exceed the cutoff frequency to generate a conditioned signal. The adaptive logic board also includes a controller (164) configured to receive the conditioned signal and to adjust the variable resistance element to adjust the cutoff frequency of the filter based on a parameter of the HVAC&R system.
H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
YORK GUANGZHOU AIR CONDITIONING AND REFRIGERATION CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Mei, Lu
Su, Xiuping
Yang, Yao
Peng, Jianping
Abstract
The present application provides an evaporator, comprising a heat exchange tube set and a distribution device. The heat exchange tube set comprises a plurality of heat exchange tubes. The distribution device is provided on one end of the length direction of the heat exchange tube set such that the distribution device can distribute a refrigerant through heat exchange tube inlets at the end portions of the plurality of heat exchange tubes. The distribution device comprises a distribution device housing, at least one receiving port, and at least one distribution member. The receiving port is provided on the distribution device housing, and the distribution member is provided in the distribution device housing. The distribution device housing is arranged around the heat exchange tube inlets at the end portions of the heat exchange tube set and seals the heat exchange tube inlets. The distribution member can receive the refrigerant through the receiving port. The distribution member is provided with a plurality of distribution ports such that the refrigerant in the distribution member can be sprayed through the plurality of distribution ports towards the heat exchange tube inlets of the heat exchange tube set. The evaporator of the present application can uniformly distribute the refrigerant to the plurality of heat exchange tubes of the heat exchange tube set by using a simple structure, thereby effectively ensuring the heat exchange efficiency of the evaporator.
F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
YORK (WUXI) AIR CONDITIONING AND REFRIGERATION CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Feng, Zhanhui
Xue, Fang
Su, Xiuping
Mei, Lu
Abstract
The present application provides a gas-liquid separator, comprising a housing assembly and a plurality of first ribs. The housing assembly has an inner side wall defining a housing accommodation cavity, and the housing assembly comprises an inlet, a gas outlet, and a liquid outlet. The inlet, the gas outlet, and the liquid outlet are communicated with the housing accommodation cavity. The inlet is provided on the inner side wall of the housing accommodation cavity, the gas outlet is provided above the inlet, and the liquid outlet is provided below the inlet. The plurality of first ribs are provided on the inner side wall of the housing assembly. Each of the plurality of first ribs is arranged at an angle with respect to the height direction of the housing assembly, and each of the plurality of first ribs comprises a first rib windward end and a first rib leeward end; in a flowing direction of a fluid entering the housing accommodation cavity from the inlet, the first rib windward end is located upstream of the first rib leeward end; in the height direction of the housing assembly, the first rib windward end is higher than the first rib leeward end. The gas-liquid separator has a compact structure, a small overall volume, and high separation efficiency.
B01D 45/16 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream
B01D 45/06 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
A squeeze film damper assembly (100) for a compressor (12) includes a damper sleeve (112) configured to be disposed about a rotor shaft (72) of the compressor (12). The damper sleeve (112) includes a pressure dam pocket (166) formed in an inner circumference (145) of the damper sleeve (112). The pressure dam pocket (166) is configured to receive a flow of lubricant (24) and to pressurize the flow of lubricant (24) via rotation of the rotor shaft (72). The damper sleeve (112) includes an outlet passage (142) extending from the pressure dam pocket (166) to an outer circumference (134) of the damper sleeve (112). The squeeze film damper assembly (100) also includes a bearing housing (110) disposed about the damper sleeve (112) to form a damper gap (116) extending between the outer circumference (134) of the damper sleeve (112) and the bearing housing (110). The damper gap (116) is fluidly coupled to the outlet passage (142) and is configured to receive the flow of lubricant (24) from the pressure dam pocket (166).
F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
F16F 15/023 - Suppression of vibrations of non-rotating, e.g. reciprocating, systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating system using fluid means
7.
SCREW COMPRESSOR, REFRIGERATION SYSTEM, AND METHOD FOR CONTROLLING REFRIGERATION SYSTEM
JOHNSON CONTROLS AIR CONDITIONING AND REFRIGERATION (WUXI) CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Yang, Shengmei
Wang, Li
Lin, Kun
Yu, Zhengxiang
Abstract
Disclosed is a screw compressor (100), comprising a screw compressor housing (101), a discharge cavity (113), at least one silencing channel, and at least one adjustment piston, wherein the discharge cavity (113) is defined by at least one portion of the screw compressor housing (101); the at least one portion of the screw compressor housing (101) defining the discharge cavity (113) forms a wall of the discharge cavity (113); at least one hole is provided in the wall of the discharge cavity (113); the at least one adjustment piston can be inserted into the at least one hole and move therein; the at least one silencing channel is formed by the at least one hole and the at least one adjustment piston, and the at least one silencing channel is in fluid communication with the discharge cavity (113); and the position of the at least one adjustment piston in the at least one hole determines the silencing length of the at least one silencing channel.
F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
F04C 23/02 - Pumps characterised by combination with, or adaptation to, specific driving engines or motors
An oil management controller for heating, ventilation, or air conditioning (HVAC) equipment. The controller includes a processing circuit. The processing circuit is configured to analyze operating data for the HVAC equipment using a machine learning model to predict a variable state or condition of oil used by the HVAC equipment. The processing circuit is configured to identify an oil deficiency based on the variable state or condition of the oil. The processing circuit is configured to automatically initiate a corrective action responsive to identifying the oil deficiency.
A method of operating a chiller to avoid future surge events, the method comprises applying chiller operating data associated with a chiller as an input to one or more machine learning models; and generating a threshold for a controllable chiller variable to prevent a future chiller surge event from occurring based on an output of the one or more machine learning models, further comprising affecting operation of the chiller based on the threshold to prevent the future chiller surge event from occurring. The method enables automatic control of a chiller to avoid future chiller surge events.
A heating, ventilation, air conditioning, and refrigeration (HVAC&R) system includes a heat exchanger with a shell having a first pass configured to place a fluid in a heat exchange relationship with a first refrigerant and a second pass configured to place the fluid in a heat exchange relationship with a second refrigerant. The heat exchanger also includes a water box coupled to the shell and configured to direct the fluid from the first pass to the second pass. The HVAC&R system also includes a fluid mixing manifold disposed within the water box, where the fluid mixing manifold is configured to collect and mix a plurality of flows of the fluid from within the water box to generate a mixed fluid, and a sensor coupled to the fluid mixing manifold, where the sensor is configured to measure a parameter of the mixed fluid.
F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
A heating, ventilating, and/or air conditioning (HVAC) system (100) includes a variable speed pump (112) configured to direct a chilled fluid through a free cooling circuit (104) of the HVAC system (100). The free cooling circuit (104) is configured to place the chilled fluid in a heat exchange relationship with ambient air. The HVAC system (100) also includes a heat exchanger (110) configured to place the chilled fluid in a heat exchange relationship with a conditioning fluid and a controller (44) configured to operate the variable speed pump (112) based on a parameter of the HVAC system (100).
A compressor includes a diffuser passage configured to receive refrigerant flow from an impeller of the compressor, where the diffuser passage is at least partially defined by a compressor discharge plate of the compressor. The compressor also includes a variable geometry diffuser positioned within the diffuser passage and configured to adjust a dimension of a refrigerant flow path through the diffuser passage, an actuator coupled to the variable geometry diffuser and configured to adjust a position of the variable geometry diffuser within the diffuser passage, and a controller configured to regulate operation of the actuator, The controller is configured to instruct the actuator to adjust the position of the variable geometry diffuser from a first position to a second position using a first force and to adjust the position of the variable geometry diffuser from the second position to a third position using a second force less than the first force, where the variable geometry diffuser abuts the compressor discharge plate in the third position.
JOHNSON CONTROLS AIR CONDITIONING AND REFRIGERATION (WUXI) CO., LTD. (China)
Inventor
Borisov, Konstantin Alex
Warriner, Jonpaul
Ogale, Anuradha Girish
Jiang, Chenyi
Lu, Fei
Abstract
It relates to an electronic identification system (160) of a logic board (100) for use in variable speed drives. Specifically, it relates to a logic board (100) for a variable speed drive having a configuration block (162) that includes a plurality of resistors (190), a control system (166) communicatively coupled to and configured to receive a signal (164) from the configuration block (162), where the control system (166) is configured to decode the signal (164) to generate data indicative of an identity of the logic board (100), and a communication interface (180) coupled to the control system (166), where the communication interface (180) is configured to provide the data indicative of the identity of the logic board (100) to an operator.
An economizer control system includes a compressor including a compression area, a piston chamber, and an economizer inlet configured to receive economizer vapor into the compression area via a flow path that extends between the economizer inlet and the compression area. At least a portion of the flow path traverses the piston chamber. The economizer control system also includes a piston disposed within the piston chamber and configured to contact the economizer vapor. The piston is moveable between an open position that opens the flow path and a closed position that closes the flow path. Additionally, the economizer control system includes a biasing system configured to apply force to the piston to bias the piston toward the closed position.
F04B 39/10 - Adaptation or arrangement of distribution members
F04B 49/03 - Stopping, starting, unloading or idling control by means of valves
F04B 49/22 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by means of valves
F04C 28/24 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves
F04D 27/00 - Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
F25B 1/00 - Compression machines, plants or systems with non-reversible cycle
Volume ratio control system for a compressor including a chamber (118) formed within a housing (112) of the compressor (100), a piston (116) disposed within the chamber (118), where the piston (116) is configured to separate the chamber (118) into at least a first portion (120) fluidly coupled to a low pressure side (104) of the compressor and a second portion (122) fluidly coupled to a high pressure side (106) of the compressor, and a biasing device (124) disposed within the chamber, where the biasing device (124) is configured to adjust a position of the piston (116) in response to a pressure differential between the low pressure side (104) of the compressor and the high pressure side (106) of the compressor falling below a threshold value.
F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
F04C 28/12 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves
A volume ratio control system for a compressor includes a chamber formed within a housing of the compressor, where the chamber is in fluid communication with a high pressure side of the compressor, a piston disposed within the chamber, where the piston includes a cavity in fluid communication with a low pressure side of the compressor, and a biasing device disposed within the chamber and configured to enable movement of the piston in response to a pressure differential between the low pressure side of the compressor and the high pressure side of the compressor falling below a threshold value.
F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
F04C 28/12 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves
A building system including one or more memory devices having instructions thereon, that, when executed by one or more processors, cause the one or more processors to receive an event from an event source, the event indicating a data value associated with the event source occurring at a particular time. The instructions cause the one or more processors to identify contextual data of a database that provides a contextual description of the event, generate an enriched event by enriching the event with the contextual data, the enriched event including the data value, the particular time, and the contextual data, and provide the enriched event to a consuming application configured to operate based on the enriched event.
A heat exchanger (100) for a heating, ventilation, air conditioning, and refrigeration (HVAC&R) system (10) includes a base portion (102) having a first plurality of channels (150) extending therethrough and a second plurality of channels (202) extending therethrough. The heat exchanger (100) further includes a first manifold (104) and a second manifold (106), where the first plurality of channels (150) extends from the first manifold (104) to the second manifold (106), and a third manifold (108) and a fourth manifold (110), where the second plurality of channels (202) extends from the third manifold (108) to the fourth manifold (110). The heat exchanger (100) further includes a single part having the base portion (102), the first manifold (104), the second manifold (106), the third manifold (108), and the fourth manifold (110).
A hybrid cooling system for a hermetic motor includes an annular cavity in a motor housing that receives a vapor flow and an annulus in the motor housing that receives a liquid flow. The hybrid cooling system includes a sleeve disposed adjacent to the annular cavity and the annulus, where a radial opening is defined through the sleeve. The hybrid cooling system includes a stator at least partially surrounded by the sleeve, a gap defined between the stator and a rotor, and a vent slot of the stator configured to receive the vapor flow from the annular cavity through the radial opening of the sleeve and direct the vapor flow to the gap. The hybrid cooling system includes an exit path in the motor housing configured to direct an evaporated vapor flow, generated from the liquid flow contacting the stator, and the vapor flow out of the motor housing.
H02K 9/20 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
H02K 9/12 - Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing wherein the cooling medium circulates freely within the casing
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
F25B 1/00 - Compression machines, plants or systems with non-reversible cycle
20.
SYSTEMS AND METHODS FOR MAINTAINING OCCUPANT COMFORT FOR VARIOUS ENVIRONMENTAL CONDITIONS
An environmental control system of a building including a first building device operable to affect environmental conditions of a zone of the building by providing a first input to the zone. The system includes a second building device operable to independently affect a subset of the environmental conditions by providing a second input to the zone and further includes a controller including a processing circuit. The processing circuit is configured to perform an optimization to generate control decisions for the building devices. The optimization is performed subject to constraints for the environmental conditions and uses a predictive model that predicts an effect of the control decisions on the environmental conditions. The processing circuit is configured to operate the building devices in accordance with the control decisions.
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
G05B 15/02 - Systems controlled by a computer electric
A smart edge controller for building equipment that operates to affect a variable state or condition within a building. The controller includes processors and non-transitory computer-readable media storing instructions that, when executed by the processors, cause the processors to perform operations including obtaining sensor data indicating environmental conditions of the building and include determining an amount of available processing resources at the smart edge controller or at the building equipment. The operations include automatically scaling a level of complexity of an optimization of a cost function based on the available processing resources and include performing the optimization of the cost function at the automatically scaled level of complexity to generate a first setpoint trajectory. The first setpoint trajectory includes operating setpoints for the building equipment at time steps within an optimization period. The operations include operating the building equipment based on the first setpoint trajectory.
A controller for a building including one or more processors and one or more non-transitory computer-readable media storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations. The operations include parsing a computer-aided design (CAD) file or a building information model (BIM) file for the building to identify building equipment that operates to affect a variable state or condition of a zone of the building. The operations include generating one or more zone models describing one or more control relationships between the building equipment and the variable state or condition of the zone based on the CAD file or the BIM file. The operations include using the one or more zone models to perform a model-based operation for the building equipment.
G05B 17/02 - Systems involving the use of models or simulators of said systems electric
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
23.
BUILDING SYSTEM WITH USER PRESENTATION COMPOSITION BASED ON BUILDING CONTEXT
A building system includes one or more storage devices having instructions stored thereon that, when executed by one or more processors, cause the one or more processors to receive an unstructured user question from a user device of a user and query a graph database based on the unstructured user question to extract context associated with the unstructured user question from contextual information of a building stored by the graph database, wherein the graph database stores the contextual information of the building through nodes and edges between the nodes, wherein the nodes represent equipment, spaces, people, and events associated building and the edges represent relationships between the equipment, spaces, people, and events. The instructions further cause the one or more processors to retrieve data from one or more data sources based on the context and compose a presentation based on the retrieved data.
G06F 16/901 - Indexing; Data structures therefor; Storage structures
G06F 16/909 - Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually using geographical or spatial information, e.g. location
24.
BUILDING MANAGEMENT SYSTEM WITH MACHINE LEARNING FOR DETECTING ANOMALIES IN VIBRATION DATA SETS
A building management system including building equipment operable to affect a variable state or condition of a building. The building management system includes a controller including a processing circuit. The processing circuit is configured to obtain a vibration data set related to vibrations of the building equipment. The processing circuit is configured to analyze the vibration data set by one or more machine learning models to generate a set of probabilities. The set of probabilities is related to a probability that the vibration data set is abnormal. The processing circuit is configured to identify the vibration data set as normal or abnormal based on the set of probabilities. The processing circuit is configured to initiate a corrective action responsive to identifying the vibration data set as abnormal.
A heating, ventilation, and air conditioning (HVAC) system (10) includes a flash tank (32) configured to receive a refrigerant and to separate the refrigerant into vapor refrigerant and liquid refrigerant. The flash tank (32) is configured to generate a flow of refrigerant therein along a circular flow path (132). The flash tank (32) has a main body (102) having a circular cross-section with a diameter (112) and an inlet (100) coupled to the main body (102) and configured to direct the refrigerant into the main body (102). The inlet (100) has a center line (110) extending in a common direction with the diameter (112), and the center line (110) is offset from the diameter (112) in a radial direction.
YORK (WUXI) AIR CONDITIONING AND REFRIGERATION CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Cai, Haifeng
Ma, Xijiao
Liu, Yuqian
Zhu, Chen
Abstract
A load balancing method for two compressors. The two compressors are used in a refrigeration system and are driven coaxially by a same driving device. The method comprises the steps of obtaining parameters, determining balance, and controlling start/stop states. The parameters in the step of obtaining parameters are parameters related to the two compressors, such as a compressor suction side flow rate, or discharge side flow rate, or suction side temperature; the step of determining balance comprises determining, on the basis of the obtained parameters related to the two compressors, whether load is balanced between the two compressors; the step of controlling start/top states comprises controlling the start/stop states of the two compressors according to whether the load is balanced. The method can monitor the load balance state of two compressors which are coaxially driven, thereby effectively avoiding failure of a refrigeration system caused by unbalanced load of the compressors.
F25B 7/00 - Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
27.
OIL SEPARATION DEVICE, CONDENSER, AND REFRIGERATION SYSTEM USING OIL SEPARATION DEVICE OR CONDENSER
YORK (WUXI) AIR CONDITIONING AND REFRIGERATION CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Ji, Shicai
Su, Xiuping
Yang, Shengmei
Yang, Ronghua
Chen, Jing
Abstract
Disclosed are an oil separation device (1283) and a condenser (130-1130) with an oil separation function, and a refrigeration system (100, 1200) using same. The oil separation device (1283) or the condenser (130-1130) comprises: a shell (201, 1301) comprising an oil separation cavity (315, 1315), a first refrigerant inlet (221, 1221), a second refrigerant inlet (222, 1222), a first flow guide channel (445-2145), and a second flow guide channel (446-2146), wherein refrigerant gas flowing through the two flow guide channels can be mixed. When the refrigeration system (100, 1200) comprises two compressors (108, 1208, 109, 1209) with different displacements, the requirement of filtering and separating a gaseous refrigerant and lubricating oil can be met without the need for designing the size of the oil separation chamber (315, 1315) in accordance with large-displacement compressors (109, 1209), and the size is small.
F25B 43/02 - Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
F25B 7/00 - Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
A heating, ventilation, and/or air conditioning (HVAC) system (10) includes a compressor (32) having an impeller (200) configured to rotate and drive a working fluid through a working fluid circuit (152) of the HVAC system (10) in an active operating mode. The HVAC system (10) further includes a controller (154) configured to, in response to receiving an input indicative of a transition to operate in an inactive operating mode, suspend the active operating mode by interrupting a supply of power to the compressor (32), adjust pre-rotation vanes (160) of the compressor (32), a variable geometry diffuser (162) of the compressor (32) to a first position, or both to enable a backflow (213) of the working fluid through the compressor (32) for a first interval of time, and, after the first interval of time has elapsed, adjust the pre-rotation vanes, the variable geometry diffuser (162), or both to a second position to block the backflow (213) of the working fluid through the compressor (32).
YORK (WUXI) AIR CONDITIONING AND REFRIGERATION CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Wang, Hongdan
Su, Xiuping
Wang, Li
Zhang, Ping
Abstract
tbb of the thread teeth of the heat exchange pipe within certain ranges, it is possible to obtain a heat exchange pipe with optimized water pressure drop or a heat exchange pipe with optimized heat exchange efficiency while the weight, in a unit length, of the heat exchange pipe is kept within a certain range. Further disclosed are a heat exchanger comprising the heat exchange pipes and an air conditioning system using the heat exchanger.
F28F 1/40 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
A building management system for monitoring and controlling HVAC parameters in a building is structured to monitor and maintain temperature, pressure, and humidity levels within the building and provide: trend analysis and control; improved reporting functions; more efficient and usable data management; improved user interfaces, dashboards, alerts, and communication; building scheduling integration; security system integration including door sensor integration; improved sensor calibration systems; and/or room adjacency based control.
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
G05B 15/02 - Systems controlled by a computer electric
31.
MODEL PREDICTIVE MAINTENANCE SYSTEM WITH SHORT-TERM SCHEDULING
A method for performing model predictive maintenance (MPM) of building equipment includes obtaining a first objective function that defines a cost of operating the building equipment and at least one of replacing the building equipment or performing maintenance on the building equipment as a function of operating decisions and at least one of replacement decisions or maintenance decisions for the building equipment for multiple short-term time steps within a short-term horizon. The method also includes performing a first optimization of the first objective function to generate a short-term maintenance and replacement schedule for the building equipment over a duration of the short-term horizon. The method also includes using a result of the first optimization to perform a second optimization of a second objective function to generate a long-term maintenance and replacement schedule for the building equipment over a duration of a long-term horizon.
A compressor is provided. The compressor includes a first stage portion with a first impeller assembly and a first diffuser assembly, a second stage portion with a second impeller assembly and a second diffuser assembly, and an interstage portion situated between the first stage portion and the second stage portion. The interstage portion includes a directing vane assembly, a collector passage surrounding the directing vane assembly, and a circumferential insertion slot fluidly coupling the collector passage to the directing vane assembly.
A building control system includes one or more controllers configured to obtain comfort feedback provided by one or more occupants of a building in response to exposing the one or more occupants to a first set of environmental conditions of the building. The one or more controllers are also configured to generate, based on the comfort feedback, one or more thresholds defining a range of values for an environmental condition of the building within which the one or more occupants are predicted to be comfortable, execute a predictive control process subject to one or more constraints based on the one or more thresholds to generate setpoints for building equipment, and operate the building equipment to drive the environmental condition of the building toward the setpoints.
A model predictive maintenance (MPM) system for building equipment includes one or more processing circuits having one or more processors and memory. The memory store instructions that, when executed by the one or more processors, cause the one or more processors to perform operations including estimating a degradation state of the building equipment, using a degradation impact model to predict an amount of one or more input resources consumed by the building equipment to produce one or more output resources based on the degradation state of the building equipment, generating a maintenance schedule for the building equipment based on the amount of the one or more input resources predicted by the degradation impact model, and initiating a maintenance activity for the building equipment in accordance with the maintenance schedule.
A method for controlling a variable refrigerant flow (VRF) system includes applying a time window to sensor data associated with the VRF system, the sensor data including input data points and having a first resolution, wherein applying the time window to the sensor data isolates a subset of the input data points; applying a timing weight to one or more input data points in the subset of the input data points to generate corrected data points having a second resolution higher than the first resolution; creating a virtual sensor and mapping the corrected data points to an output of the virtual sensor; and controlling the VRF system based on an output of the virtual sensor. The use of virtual sensors with a higher resolution than corresponding physical sensors in this manner allows for existing physical sensors to be used while improving performance of the VRF system.
A method includes defining a plurality of monitored spaces. For each of at least a subset of the plurality of monitored spaces, the method includes associating a set of laboratory equipment with the monitored space, calculating an equipment utilization score for the monitored space based on resource consumption data for the set of laboratory equipment, calculating an occupancy utilization score for the monitored space based on occupant tracking data for the monitored space, and calculating a combined utilization score based on the equipment utilization score and the occupancy utilization score. The method also includes providing a graphical user interface comprising the combined utilization scores for the subset of the plurality of monitored spaces.
A model predictive maintenance system for building equipment. The system includes one or more processing circuits including one or more processors and memory storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations. The operations include performing an optimization of an objective function that defines a present value of a total cost of operating the building equipment and performing maintenance on the building equipment as a function of operating decisions and maintenance decisions for the building equipment for time steps within a time period. The total cost includes one or more costs incurred during one or more future time steps of the time period. The operations include operating the building equipment and performing maintenance on the building equipment in accordance with decisions defined by the result of the optimization.
JOHNSON CONTROLS AIR CONDITIONING AND REFRIGERATION (WUXI) CO., LTD (China)
Inventor
Xue, Fang
Bradshaw, David Andrew
Su, Xiuping
Mei, Lu
Lin, Kun
Abstract
A flooded evaporator (38) for a HVAC&R system (10) includes a shell (102) defining an interior volume (264) and a refrigerant inlet (110) configured to direct a two-phase refrigerant (106) into the shell (102). The flooded evaporator (68) includes a liquid distributor (104) disposed within the interior volume (264) of the shell (102) and configured to receive the two-phase refrigerant (106) from the refrigerant inlet (110). The liquid distributor (104) includes a main body (160, 162) coupled to a bottom portion (114) of the shell and separating the interior volume (264) of the shell into a distributor volume (222) and a remaining volume (262). The liquid distributor (104) also includes a refrigerant passage (352) formed in the main body (160, 162) and fluidly coupling the distributor volume (222) and the remaining volume (262). The refrigerant passage (352) includes a first portion and second portion, the first portion includes a first cross-sectional area greater than a second cross-sectional area of the second portion, and the first portion is closer to the refrigerant inlet (110) than the second portion.
F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
F28D 21/00 - Heat-exchange apparatus not covered by any of the groups
A heating, ventilation, or air conditioning (HVAC) system for one or more building zones includes airside HVAC equipment operable to provide clean air to the one or more building zones and a controller. The controller is configured to obtain a dynamic temperature model and a dynamic infectious quanta model for the one or more building zones, determine an infection probability, and generate control decisions for the airside HVAC equipment using the dynamic temperature model, the dynamic infectious quanta model, and the infection probability.
F24F 3/16 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by ozonisation
A building management system (BMS) for filtering a fluid within a building is shown. The system includes one or more sensors configured to measure one or more characteristics of a first fluid within an air duct of the BMS and measure one or more characteristics of a second fluid after the second fluid has been filtered. The system further includes a pollutant management system configured to receive data from the one or more sensors and control a filtration process. The filtration process selects a filter of a plurality of filters based on a level of the one or more characteristics of the first fluid and the one or more characteristics of the second fluid.
F24F 3/16 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by ozonisation
B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
Systems and methods for providing visualization of health risks within a building and for reducing health risks with respect to an infectious disease in buildings. Health risk levels for building spaces are determined using occupancy data and health risk data relating to a risk of contracting or spreading an infectious disease. A visualization of the health risk levels is generated and presented on a user interface. Health data for an infectious diseases is used to determine a health risk level for building spaces and individuals in the building. An air handling action or a disinfection action is performed based on the health risk level.
A heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system includes a first vapor compression flow path (102) having a first condenser (104) configured to place a working fluid in a heat exchange relationship with a cooling fluid, a second condenser (116) a first evaporator (110) and a first compressor (124), a second vapor compression flow path (107) including a second evaporator (120) configured to place the working fluid in a heat exchange relationship with a conditioning fluid, a second compressor (126), the second condenser (116) and the first evaporator (110), a shared vapor compression flow path including the second condenser (116) and the first evaporator (110).
F28D 1/00 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or mo
A heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system includes a first refrigerant circuit (102) having a first compressor (106) configured to circulate a first refrigerant through a first condenser (110) and a first evaporator (108), a second refrigerant circuit (104) having a second compressor (114) configured to circulate a second refrigerant through a second condenser (118) and a second evaporator (116), and a heat exchanger (126) configured to place the first refrigerant in a heat exchange relationship with the second refrigerant. The first refrigerant circuit is configured to direct the first refrigerant from the first condenser to the heat exchanger and from the heat exchanger to the first evaporator, and the second refrigerant circuit is configured to direct the second refrigerant from the second condenser to the heat exchanger and from the heat exchanger to the second evaporator.
F25B 5/04 - Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
F25B 6/04 - Compression machines, plants or systems, with several condenser circuits arranged in series
F25B 7/00 - Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
F25B 25/00 - Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups
F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
F25B 5/02 - Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
A heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system (100) includes a refrigerant circuit (104) configured to flow a refrigerant therethrough, a sump (102) configured to direct a lubricant to a compressor (106), an ejector (116) configured to direct the lubricant from the refrigerant circuit (104) to the sump (102), and an expansion device (110) configured to reduce a pressure of the refrigerant directed through the refrigerant circuit (104). The HVAC&R system (100) further includes a controller (130) configured to instruct the expansion device (110) to adjust to a first position to enable the ejector (116) to direct lubricant from the refrigerant circuit (104) to the sump (102) at a first target flow rate in a first mode, and the controller (130) is configured to instruct the expansion device (110) to adjust to a second position to enable the ejector (116) to direct lubricant from the refrigerant circuit (104) to the sump (102) at a second target flow rate in a second mode.
A device for illumination and fire safety in a room includes a housing, one or more light emitting devices, one or more fire safety components, and a controller. The one or more light emitting devices are coupled to the housing and configured to provide ambient lighting for the room during a normal mode of operation. The one or more fire safety components are coupled to the housing and configured to notify occupants of the room of a fire during an alarm mode of operation. The controller is configured to transition from the normal mode of operation into the alarm mode of operation in response to detecting the fire. The device may include facilities for remote self-testing which may include one or more of a light detector, a sound detector, and a smoke emission system. The device may perform the self-test in a test mode.
A controller for a building control system includes processors and memory storing instructions that, when executed by the processors, cause the processors to perform operations including identifying zones within a building, analyzing data associated with the zones, and generating zone groupings based on the data associated with the zones. Each of the zone groupings define zone groups and specify which of the zones are grouped together to form each of the zone groups. The operations also include identifying a particular zone grouping from zone groupings based on the data associated with zones and using the particular zone grouping to generate control signals to operate equipment of the building control system to provide heating or cooling to the zones.
F24F 1/0003 - Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
F24F 3/06 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
F24F 3/10 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with separate supply lines and common return line for hot and cold heat-exchange fluids
F24F 11/64 - Electronic processing using pre-stored data
F24F 11/65 - Electronic processing for selecting an operating mode
F24F 11/67 - Switching between heating and cooling modes
A predictive heating system for a building zone includes building equipment, a temperature sensor, a humidity sensor, and a predictive heating controller. The building equipment is operable to affect an environmental condition of the building zone in a heating mode of operation and a cooling mode of operation. The temperature sensor is configured to measure a temperature of the building zone. The humidity sensor is configured to measure humidify of the building zone. The predictive heating controller is configured to predict an occupancy time of the building zone over a future time period, determine a dehumidification time period before the occupancy time of the building zone, determine a heating time period before the occupancy time of the building zone, operate the building equipment to dehumidify the building zone over the dehumidification time period, and operate the building equipment to heat the building zone over the heating time period.
A valve assembly is disclosed. The valve assembly may a valve body defined by an inlet port, an outlet port and flange. A movable valve member comprises an inlet opening extending from a leading edge surface present at a narrow slot region to trailing edge surface present at about a full bore region wherein the angle between the leading edge surface and trailing edge surface at the center of valve member is about (270) degrees. The fluid flow from the inlet port of the valve body to one or more outlet openings is controlled by the rotation of the valve member. Rotation of movable valve member enables linear controlling of the fluid flow wherein the control of fluid flow is proportional to the degrees of rotation from (0) to about (270) degrees.
F16K 5/04 - Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
F16K 5/12 - Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
F16K 5/06 - Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
A vapor compression system includes a compressor configured to circulate a refrigerant through a refrigerant loop, a sump configured to receive a mixture of lubricant and the refrigerant from the compressor, and a controller having a memory and a processor. The processor is configured to receive a first signal indicative of a temperature of the mixture within the sump, receive a second signal indicative of a pressure of the mixture within the sump, determine a relative amount of the refrigerant in the mixture based on the first signal and the second signal, and output a control signal in response to the relative amount of the refrigerant in the mixture exceeding a threshold value.
A system for cooling a hermetic motor (14) includes a housing (60) of the hermetic motor (14) that is configured to be disposed along a motor cooling refrigerant flow path (24). The housing (60) is configured to surround at least a portion of a stator (62) of the hermetic motor (14) and includes an annular cavity (78) configured to receive refrigerant from a refrigerant loop (16). The system also includes a sleeve (72) configured to be positioned between the annular cavity (78) and the stator (62), where the sleeve (72) includes a plurality of discharge ports (90) oriented generally parallel to a central axis (120) of the stator (62). The plurality of discharge ports (90) is configured to discharge the refrigerant from the annular cavity (78) toward the stator (62).
H02K 9/20 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
51.
FLUID FLOW CONTROL FOR A COMPRESSOR LUBRICATION SYSTEM
A fluid pressure control system (110) for a compressor (32) includes a pump (90) configured to direct a lubricant toward a bearing (96) of the compressor (32), a sensor (112) configured to provide feedback indicative of a speed of a shaft (94) of the compressor (32), where the shaft (94) is configured to be at least partially supported by the bearing (96). The fluid pressure control system (110) also includes a non-transitory computer readable medium having executable instructions that, when executed by a processor (44), are configured to cause the processor (44) to receive a signal indicative of the speed of the shaft (94) from the sensor (112) and adjust operation of the pump (90) based on the signal.
F04D 29/063 - Lubrication specially adapted for elastic fluid pumps
F16N 7/38 - Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
A heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system includes a refrigerant loop having a compressor configured to circulate a refrigerant therethrough, a motor configured to drive rotation of the compressor, wherein the motor is a permanent magnet assisted synchronous reluctance (PMASR) motor, and a motor cooling system configured to direct a portion of the refrigerant from the refrigerant loop and through a housing of the PMASR motor to place the portion of the refrigerant in thermal communication with components of the PMASR motor.
A heating, ventilation, air conditioning, and refrigeration (HVAC&R) system includes a high-pressure vessel including a first shell and a fluid outlet extending from the first shell. The HVAC&R system also includes a low-pressure vessel including a second shell and a fluid inlet extending into the second shell. The low-pressure vessel is disposed above the high-pressure vessel. The HVAC&R system includes a conduit coupling the fluid outlet to the fluid inlet. The conduit is configured to direct a two-phase flow of a refrigerant upward within a vertical portion of the conduit.
[0068] A heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system includes a first condenser configured to place a first refrigerant in a heat exchange relationship with a cooling fluid, a second condenser configured to place a second refrigerant in a heat exchange relationship with the cooling fluid, and a conduit system configured to direct a first portion of the cooling fluid from a cooling fluid supply to the first condenser and then through a first section of the second condenser in a series configuration. Further, the conduit system is configured to direct a second portion of the cooling fluid directly from the cooling fluid supply to a second section of the second condenser, such that the first portion of the cooling fluid and the second portion of the cooling fluid flow through the first condenser and the second condenser in a parallel configuration.
YORK (WUXI) AIR CONDITIONING AND REFRIGERATION CO., LTD. (China)
Inventor
Xu, Yingchun
Lu, Xiaoying
Yin, Qi
Jiang, Liquan
Abstract
Systems and apparatuses include a thermostat. The thermostat includes an input/output module (106), a plate (104) coupled to the input/output module (106), and a control panel (102). The input/output module (106) is configured to communicate with an HVAC system. The plate (104) defines a receptacle formed by at least one wall having a first electrical terminal (124) in electrical communication with the input/output module. The control panel (106) is at least partially received within the receptacle and is releasably coupled to the plate (104). The control panel (106) includes a base (130), a frame extending away from the base (130) to support a display (146), processing electronics (150) positioned within an interior volume of the base, a power Source (156) received within the interior volume of the base, and a communication module (154) received within the interior volume of the base (130). The communication module (154) transmits instruction.
A method includes receiving, by an edge controller, data relating to a first space. The edge controller controls operation of an edge device affecting a characteristic of the first space and that is associated with a first building equipment domain. The method further includes analyzing, by the edge controller, the data to determine whether the data satisfies a condition. If the condition is satisfied, the edge controller controls operation of the edge device using the data. If the condition is not satisfied, the edge controller (a) transmits a request to a cloud controller to analyze the data based on information obtained by the cloud controller regarding at least one of a second space or a second building equipment domain, (b) receives a response to the request from the cloud controller, and (c) controls operation of the edge device using the response from the cloud controller.
H04L 29/08 - Transmission control procedure, e.g. data link level control procedure
F24F 11/54 - Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
G05B 15/02 - Systems controlled by a computer electric
57.
SYSTEMS AND METHODS FOR DISPLAY OF BUILDING MANAGEMENT USER INTERFACE USING MICROSERVICES
A method for a processing circuit to display a graphical user interface (GUI) for a building management system (BMS). The method includes retrieving structured data from a display service executed by the processing circuit, wherein the structured data is a library. The method further includes generating a tag based on the structured data, wherein the tag associates interface data and bound data from a number of different data sources. The interface data describing an arrangement of an element of the GUI, and the bound data describing content of the element. The bound data is associated with the element according to the arrangement. The interface data and bound data are selected by a user. The method further includes displaying, on a display of a client device, the GUI based on the tag. The GUI may be used in different formats by associating the interface data with a different one of bound data, or the bound data with a different one of the interface data.
YORK (WUXI) AIR CONDITIONING AND REFRIGERATION CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Zhu, Yu
Yu, Zhengxiang
Zeng, Fanfei
Zhang, Fengzhi
Abstract
A screw compressor (100), comprising a screw rotor (110) and a spool valve (120). The screw rotor (110) comprises a suction head end (111) and an exhaust tail end (112). Gas is sucked in from the suction head end (111) and compressed gas is discharged from the exhaust tail end (112). The spool valve (120) comprises a working side (125) for sealing a compression chamber of the screw rotor (110). The working side (125) comprises a spool valve head end (121) and a spool valve tail end (122) and can do a reciprocating motion along the axis direction of the screw rotor (110). When the spool valve (120) moves to a suction capacity adjusting position (240), the spool valve head end (121) is located at the inner side of the suction head end (111) of the screw rotor (110), and a suction capacity adjusting distance (D2) is formed between the spool valve head end (121) and the suction head end (111) so that the suction capacity of the screw compressor is adjusted. The suction capacity of the screw compressor (100) can be adjusted by means of the spool valve (120), so that the problem of motor temperature and exhaust gas temperature limits of conventional variable frequency screw sets is effectively solved and the operational range and the load regulation ability of the screw compressor are expanded.
F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
F04C 28/20 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the volume of the working chamber by changing the form of the inner or outer contour of the working chamber
59.
SYSTEMS AND METHODS FOR PROVIDING PERSONA-ADJUSTED DATA
A method for providing one or more persona-adjusted search suggestions is disclosed. The method includes identifying a role of a user that is associated with one or more duties and performance indicators for one or more buildings. The method includes associating the role of the user with at least one of a physical space, a web page, and one or more assets associated with the physical space. The method includes filtering data associated with the one or more buildings based on the role of the user and the at least one of the physical space, the web page, and the one or more assets. The method includes displaying the filtered data on a user interface as one or more search suggestions to the user.
A heat exchanger (100) of a heating, ventilation, air conditioning, and refrigeration (HVAC&R) system includes a plurality of microchannel tubes (104, 106), where each microchannel tube (104, 106) of the plurality of microchannel tubes (104, 106) is configured to direct refrigerant therethrough, and a plurality of fin sets (116), where each fin set (116) of the plurality of fin sets (116) is disposed between corresponding adjacent microchannel tubes (104, 106) of the plurality of microchannel tubes (104, 106). Additionally, each fin set (116) of the plurality of fin sets (116) includes a respective fin density based on a location of the respective fin set (116) along a height (112) of the heat exchanger (100).
F28D 1/053 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or mo with the heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
F28F 1/12 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
YORK GUANGZHOU AIR CONDITIONING AND REFRIGERATION CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Yu, Demao
Wu, Shuang
Abstract
Disclosed is a refrigeration system, comprising refrigeration system components, a connecting pipeline, a switch structure, and discharging channels (123, 124; 623, 624). The refrigeration system components comprise three heat exchangers (101; 102; 112). The refrigeration system components can be connected via the connecting pipeline, and are combined into different working systems via the switch structure. When two heat exchangers are selected by the switch structure to form one working system and the saturation temperature corresponding to the internal pressure of the unselected heat exchanger is higher than the medium or environment temperature of the heat exchanger, a liquid refrigerant accumulates inside the non-working heat exchanger. According to the refrigeration system, the switch structure is arranged at either end of the non-working heat exchanger, so that the non-working heat exchanger is isolated from a working system cycle, and under the condition where the pressure at a low-pressure side (C; Q) of the working system is less than the internal pressure of the non-working heat exchanger, additional discharging channels (123, 124; 623, 624) communicate with the non-working heat exchanger and the low-pressure side (C; Q) of the working system, so that the refrigerant accumulating in the non-working heat exchanger is transferred to the system cycle, avoiding a lack of refrigerant in the system cycle.
A heating, ventilation, or air conditioning (HVAC) system includes a headless thermostat device and an adapter unit. The headless thermostat device includes one or more circuits configured to receive a control input from a user device via a local wireless network and generate a control signal for HVAC equipment based on the control input. The adapter unit includes one or more circuit configured to receive the control signal from the headless thermostat device via the local wireless network and provide the control signal to the HVAC equipment for operation of the HVAC equipment in accordance with the control input. The adapter unit performs backup control processes if a connection to the local wireless network cannot be established.
A method for visualizing and managing entities and connections between entities based on a graphical user interface (GUI) node editor, the method including constructing an entity datablock, wherein the entity datablock is a data structure describing an entity and includes entity descriptive information, an entity category, an entity name, entity relationships, and an entity identifier. The method further including establishing the entity relationships as bi-directional relationships, wherein the bi-directional relationships link two disparate entities, representing the entity datablock as a node and the bi-directional relationships as lines connecting two nodes, wherein the node includes at least one of the entity descriptive information, the entity category, or the entity name.
A method includes generating, by a processing circuit, a building component tree for the graphical user interface, wherein the building component tree comprises one or more draggable building components and one or more non-draggable building components and causing, by the processing circuit, the graphical user interface to include the building component tree comprising the draggable building components and the non-draggable building components. The method includes receiving, by the processing circuit via the graphical user interface, a selection of one of the one or more draggable building components and a user interaction dragging the one of the one or more draggable building components into a window of the graphical user interface.
YORK GUANGZHOU AIR CONDITIONING AND REFRIGERATION CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Yuan, Bin
Wang, Li
Wu, Chenggang
Zhu, Jian
Abstract
A blade (112), comprising a blade tip (216), a blade root (218), a leading edge (222), and a trailing edge (220), wherein the leading edge (222) and the trailing edge (220) each extend from the blade tip (216) to the blade root (218); the blade (112) may rotate around a rotation axis (X), and the rotation axis (X) and a normal plane of the rotation axis (X) perpendicularly intersect at the foot of the perpendicular (O); a projection of the leading edge (222) on the normal plane along the rotation axis (X) is a first curve, and the first curve has an even number of inflection points. The blade (112) can reduce noise and improve aerodynamic performance when the blade (112) rotates.
YORK (WUXI) AIR CONDITIONING AND REFRIGERATION CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Su, Xiuping
Wang, Shenglong
Sheng, Shimin
Fan, Minnan
Abstract
A falling film evaporator (100), a housing (101) thereof being accommodated with a heat exchange tube (304), a perforated plate (205) and a spraying tube (202), the perforated plate (205) being provided between the spraying tube (202) and the heat exchange tube (304), such that refrigerant sprayed from the spraying tube (202) is sprayed onto the surface of the heat exchange tube (304) by means of distribution of the perforated plate (205); spraying openings (301) on the spraying tube (202) have a strip shape, and the extension direction of the openings is perpendicular to the length direction of the spraying tube (202). By means of configuring the length direction of the spraying tube (202) to be substantially perpendicular to the length direction of the heat exchange tube (304), refrigerant sprayed from the spraying openings (301) flows substantially in the length direction of the housing (101), the flow path of the refrigerant being lengthened, avoiding uneven spraying on the surface of the heat exchange tube (304).
F28D 5/00 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
A motor assembly includes a shaft, a bearing, at least one fluid channel, a temperature sensor, a lubricant supply pump, and a controller. The bearing defines a bearing interface against which the shaft rotates. The at least one fluid channel is fluidly coupled with the bearing interface. The temperature sensor detects a temperature of the bearing. The lubricant supply pump is fluidly coupled with the at least one fluid channel to transport lubricant from a lubricant supply to the bearing interface via the at least one fluid channel. The controller receives the bearing temperature from the temperature sensor, determines a difference between the bearing temperature and a supply temperature of the lubricant, determines a lubricant flow rate based on the difference, and transmits a control signal to the lubricant supply pump to cause the lubricant supply pump to transport the lubricant to the bearing interface at the lubricant flow rate.
F16C 17/00 - Sliding-contact bearings for exclusively rotary movement
F16C 17/24 - Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired conditions, e.g. for preventing overheating, for safety
F16C 19/00 - Bearings with rolling contact, for exclusively rotary movement
F16C 19/52 - Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
YORK (WUXI) AIR CONDITIONING AND REFRIGERATION CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Mei, Lu
Su, Xiuping
Abstract
A condenser (100), comprising a shell (112), an inlet pipe (120), and an anti-impact plate (204). The shell (112) has an accommodating cavity (202). The inlet pipe (120) is a circular pipe having a gradually increasing inner diameter from the inlet to the outlet. The inlet pipe (120) is arranged to pass through the upper end of the shell (112), the outlet of the inlet pipe (120) being accommodated in the accommodating cavity (202). The anti-impact plate (204) is accommodated in the accommodating cavity (202), and the anti-impact plate (204) is positioned below the outlet of the inlet pipe (120). There is a gap between the anti-impact plate (204) and the outlet through which fluid flowing from the outlet can flow. The condenser (100) can reduce the friction loss and local resistance of the refrigerant gas flowing into the inlet pipe (120), such that the dynamic pressure of the refrigerant gas entering the condenser (100) is partially converted into static pressure, and reduce the static pressure loss of the refrigerant gas entering the cylinder from the inlet, thereby increasing the condensing pressure of the refrigerant gas in the condenser (100) to enhance the heat exchange performance.
F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
A building system for operating a building and managing building information causes one or more processors to receive building data from one or more building data sources, generate relationships between entities based on the building data, wherein the relationships comprises a pair of relationships between a first entity and a second entity of the entities representing two different types of relationships, wherein the pair of relationships comprises a first relationship between the first entity and the second entity and a second relationship between the second entity and the first entity, and update a space graph by causing the space graph to store nodes representing the entities and edges between the nodes representing the relationships, wherein the space graph is a graph data structure.
A vapor compression system includes a first conduit (78) fluidly coupling a liquid collection portion of a condenser (34) and an evaporator (38), where the first conduit is configured to direct a first flow of refrigerant from the condenser to a first inlet of the evaporator and a second conduit (82) fluidly coupling the liquid collection portion of the condenser and the evaporator, where the second conduit is configured to direct a second flow of refrigerant from the condenser to a second inlet of the evaporator via gravitational force, and where the first inlet is disposed above the second inlet relative to a vertical dimension of the evaporator (38).
A chiller (22) includes an evaporator (46), a compressor (48) including a prime mover (84), a first pressure sensor (86) that detects a first pressure in the evaporator (46), a second pressure sensor (88) that detects a second pressure in a condenser (50), and a controller (100). The controller (100) determines a predicted energy level of the compressor (48) based on the first pressure and the second pressure, the predicted energy level associated with liquid droplet flow into the compressor (48), compares the predicted energy level to an operating energy level, and modifies the at least one of the input power and the input current to the prime mover (84) based on the comparison satisfying a modification condition.
A building management enterprise system includes a display device, one or more processors, and one or more computer-readable storage media communicably coupled to the one or more processors and having instructions stored thereon that cause the one or more processors to: identify one or more factors for evaluating economic effectiveness of an enterprise having a plurality of physical nodes; receive data associated with each of the factors from a plurality of data sources for each of the nodes, the plurality of data sources including at least one sensor located in each of the nodes; determine a benchmark value for each of the factors; compare the data received from the plurality of data sources with the benchmark value for each of the factors; calculate an effectiveness score for each of the factors based on the compare; and control the display device to display one or more performance indicators associated with the effectiveness score for each of the nodes.
Embodiments of the present disclosure are directed to a breathable vent plug that includes a vent plug portion and a breathable vent portion. The breathable vent portion according to various embodiments may be disposed within the vent plug portion to enable relatively low flow rates of gas to flow into and out of the battery module housing, while maintaining liquid tightness. Further, the vent plug portion may include a seal that is configured to rupture and/or otherwise dislodge both the vent plug portion and the breathable vent portion to enable a quick release of pressure from within the battery module housing.
A building management system includes one or more processors, and one or more computer-readable storage media communicably coupled to the one or more processors and having instructions stored thereon that cause the one or more processors to: receive utterance data from a voice assist device; determine a location of the voice assist device; analyze the utterance data to identify a sentiment relating to a temperature of the location; and control an HVAC system to adjust the temperature of the location based on the sentiment.
A building management system includes one or more processors, and one or more computer-readable storage media communicably coupled to the one or more processors and having instructions stored thereon that cause the one or more processors to: define a state of a zone or space within a building; control an HVAC system to adjust a temperature of the zone or space corresponding to a first action; receive utterance data from a voice assist device located in the zone or space; analyze the utterance data to identify a sentiment relating to the temperature of the zone or space; calculate a reward based on the state, the first action, and the sentiment; determine a second action to adjust the temperature of the zone or space based on the reward; and control the HVAC system to adjust the temperature of the zone or space corresponding to the second action.
G05B 15/02 - Systems controlled by a computer electric
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
76.
SYSTEMS AND METHODS OF ZONE-BASED CONTROL VIA HETEROGENEOUS BUILDING AUTOMATION SYSTEMS
A method for zone-based control of devices within a building management system (BMS) includes receiving a request to control a zone in a building. The method includes identifying a plurality of available zones in the building. The method includes receiving a selection to control a first zone from the plurality of available zones. In response to the selection, the method includes generating a password to restrict control of at least one device in the first zone. The method includes transmitting the password to the user device. The method includes receiving, via the input interface of the zone device different from the user device, the password. The method includes authorizing, responsive to receipt of the password via the input interface of the zone device, control of the at least one device in the first zone.
A method for zone-based control of devices within a building management system (BMS) includes receiving a request to control a zone in a building. The method includes identifying a plurality of available zones in the building. The method includes receiving a selection to control a first zone from the plurality of available zones. In response to the selection, the method includes generating a password to restrict control of at least one device in the first zone. The method includes transmitting the password to the user device. The method includes receiving, via the input interface of the zone device different from the user device, the password. The method includes authorizing, responsive to receipt of the password via the input i nterface of the zone device, control of the at least one devi ce in the first zone.
YORK GUANGZHOU AIR CONDITIONING AND REFRIGERATION CO., LTD. (China)
JOHNSON CONTROLS TECHNOLOGY COMPANY (USA)
Inventor
Yuan, Bin
Feng, Shifeng
Wang, Hongdan
Wu, Chenggang
Abstract
A blade (112) and an impeller (100) using same, the blade (112) comprising: an upper surface and a lower surface, the upper surface being a pressure surface (212), and the lower surface being a suction surface (214); the pressure surface (212) and the suction surface (214) extending from a blade tip (216) to a blade root (218) and extending from a front edge (222) to a tail edge (220); a front portion and a rear portion, the front portion being close to the blade tip (216), and the rear portion being close to the blade root (218); and a bent portion (262), the bent portion (262) arching from the pressure surface (212) towards the suction surface (214); the bent portion (262) having the lowest point (E) in a radial cross section of the blade (112), and a connecting line of a plurality of lowest points (E) extending in a direction from the front edge (222) to the tail edge (220). The blade can prevent flow separation on the blade surfaces, improve the detached eddy on the surfaces, and reduce the blade tip leakage, thereby improving the blade performance and reducing operation noise.
A system for monitoring and controlling devices within a building management system (BMS). The system includes a user device configured to receive and convert a vocal input to voice data, and a BMS processor in communication with the user device and an operating device within the BMS. The BMS processor converts voice data to intent and entity parameters, and determines if the intent parameter is a visual intent or an audio intent. If the intent parameter is a visual intent, the BMS processor determines a category corresponding to the entity parameter, and outputs a web page corresponding to the category. Additionally, if the intent parameter is an audio intent, the BMS processor determines a category corresponding to the entity parameter, and retrieves and outputs operating device data corresponding to the category. Further, the user device outputs audi o data corresponding to the operating device data and displays the web page.
A planning tool used to facilitate more efficient design of a central plant is configured to provide an advanced user interface. The user interface includes a symbol palette with selectable symbols that represent resource suppliers, subplants, energy loads, and resource storage devices associated with a central plant. The user interface allows users to drag these symbols onto a workspace and form various connections between the symbols. The user interface provides feedback to the user and prevents improper connections by evaluating user inputs according to a set of rules. The rules define valid relationships between the resource suppliers, subplants, energy loads, and resource storage devices. The user interface also allows users to specify equipment contained within the subplants. After a central plant model is created via the user interface, users can simulate operation of a central plant according to the model for planning, budgeting, and/or design considerations.
G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control (DNC), flexible manufacturing systems (FMS), integrated manufacturing systems (IMS), computer integrated manufacturing (CIM)
A sprinkler for a fire suppression system includes a body defining an inlet and an outlet fluidly coupled to one another, a frame assembly including a frame member coupled to the body and extending away from the outlet, a deflector coupled to the frame member and offset from the outlet, a seal assembly configured to sealingly engage the body to prevent flow through the outlet, and a trigger assembly. The trigger assembly includes a shape memory alloy element configured to deform from an unactuated configuration to an actuated configuration in response to reaching an activation temperature. In the unactuated configuration, the trigger assembly directly engages both the frame assembly and the seal assembly and holds the seal assembly in sealed engagement with the body. In the actuated configuration, the trigger assembly permits the seal assembly to disengage from the body.
The present disclosure relates to a bearing load control system that includes a force application device configured to apply a force to a bearing of a compressor and a sensor configured to provide feedback indicative of an operating parameter of the compressor. The bearing load control system also includes a controller that is communicatively coupled to the sensor and configured to determine an indication of a thrust force applied to the bearing based on the feedback indicative of the operating parameter. The controller is also configured to adjust the force application device to control the force applied to the bearing based at least in part on a control algorithm and the indication of the thrust force.
F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
83.
VARIABLE REFRIGERANT FLOW SYSTEM WITH ELECTRICITY CONSUMPTION APPORTIONMENT
A variable refrigerant flow system for a building includes a plurality of indoor units, a first outdoor unit, an outdoor meter, and a variable refrigerant flow management system. The plurality of indoor units configured to generate activation requests. The first outdoor unit is configured to receive the activation requests and, in response to the activation requests, provide a refrigerant to the plurality of indoor units. The outdoor meter is configured to provide an outdoor unit electricity consumption measurement. The variable refrigerant flow management system is configured to receive the outdoor unit electricity consumption measurement and activation data indicating the activation requests and apportion an outdoor share of the outdoor electricity consumption measurement to each of the plurality of indoor units based on the activation data.
An access control system (ACS) for a building includes an access reader, a camera, and an access controller. The access reader is configured to read an access credential provided by a person at an access point and generate ACS data including the access credential. The camera is configured to capture facial recognition system (FRS) data including an image of the person at the access point. The access controller is configured to determine whether the access credential is valid based on the ACS data, determine whether the person is recognized based on the FRS data, grant or deny access to the person through the access point based on whether the access credential is valid and whether the person is recognized, and generate and store one or more of a plurality of access events. Each of the access events corresponds to a different combination of whether the access credential is valid and whether the person is recognized.
One implementation of the present disclosure is a system including a data network, a source device, and a target device. The data network is configured to wirelessly communicate data, the source device is configured to wirelessly communicate data, and the target device is configured to wirelessly communicate data. The target device and the source device utilize a first medium access control (MAC) protocol during a first time interval of a duty cycle and a second MAC protocol during a second time interval of the duty cycle.
JOHNSON CONTROLS AIR CONDITIONING AND REFRIGERATION (WUXI) CO., LTD. (China)
Inventor
Borisov, Konstantin Alex
Warriner, Jonpaul
Jiang, Chenyi
Ogale, Anuradha Girish
Lu, Fei
Abstract
The present disclosure relates to an adaptive logic board 100 that includes a signal sensing circuit 153 configured to receive an input signal as an electrical current. The signal sensing circuit 153 includes a plurality of resistors 154 and a plurality of switches 156 configured to electrically couple or electrically decouple the plurality of resistors 154 from the signal sensing circuit 153, in which each switch of the plurality of switches 156 corresponds to a corresponding resistor of the plurality of resistors 154. The adaptive logic board 100 also includes a sensing unit 180 that is configured to measure a voltage drop of the input signal across an active resistor of the plurality of resistors 154.
F24F 11/89 - Arrangement or mounting of control or safety devices
F24F 11/86 - Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
F25B 1/00 - Compression machines, plants or systems with non-reversible cycle
F24F 11/49 - Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
H02P 29/00 - Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
H02M 7/00 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
87.
BUILDING ACCESS CONTROL SYSTEM WITH COMPLEX EVENT PROCESSING
Systems and methods in an access control system include providing a temporal model, spatial models, and user models to identify patterns in access control event data and determine whether to generate alarms. These models facilitate dynamic processing and analyzing of access control events such as door forced open events, door held open events, access granted events, and access denied events generated by access control devices such as card readers, biometric readers, and keypad readers.
G08B 19/00 - Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
G08B 13/08 - Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
G08B 21/22 - Status alarms responsive to presence or absence of persons
G08B 29/18 - Prevention or correction of operating errors
G07C 9/00 - Individual registration on entry or exit
88.
BUILDING ACCESS CONTROL SYSTEM WITH SPATIAL MODELING
A method in an access control system includes maintaining a database of access control event data generated by a plurality of access control devices installed in a building and iterating through the access control event data in order to generate a connectivity model for the building. Generating the connectivity model includes, for each iteration, identifying a user interaction with a first door at a first time and a user interaction with a second door at a second time, determining if a difference between the first time and the second time is less than a threshold period of time, and either creating the connection between the first door and the second door or updating a weight associated with the connection. The connectivity model can be used in the access control system to correlate access control events across locations in a building or building campus.
A hand hygiene monitoring system is provided. The system includes a wearable tag device coupled to a user, and a reader device communicably coupled to the wearable tag device. The reader device is configured to detect a presence of the wearable tag device by receiving a first frequency message comprising a user identifier from the wearable tag device. The reader device is further configured to transmit a second frequency message to the wearable tag device requesting event log data. The second frequency has a higher frequency than the first frequency. The reader device is further configured to receive an event log data message from the wearable tag device at the second frequency, and to determine whether the wearable tag device has logged a wash station encounter within a configurable time period based on the event log data message.
G16H 40/20 - ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the management or administration of healthcare resources or facilities, e.g. managing hospital staff or surgery rooms
A building optimization system includes charging and discharging a battery of a battery power vehicle. The building optimization system includes a charging system configured to cause the battery of the battery powered vehicle to charge or discharge. The building optimization system also includes an optimization controller including a processing circuit. The processing circuit is configured to receive charging constraints for the battery powered vehicle, determine whether to charge discharge the battery of the battery powered vehicle based on the charging constraints, and cause the charging system to charge or discharge the battery of the battery powered vehicle based on the optimization.
In certain embodiments, a condenser includes a shell having a longitudinal axis, a first tube bundle disposed within the shell, and a subcooler component disposed within the shell beneath the first tube bundle. The subcooler component includes a rectilinear housing, a plurality of rectilinear grid support assemblies disposed within the rectilinear housing and spaced lengthwise along the axis of the shell, and a second tube bundle (84) disposed within the rectilinear housing, wherein tubes of the second tube bundle are held in place within rectilinear grid channels of the rectilinear grid support assemblies.
F28F 9/013 - Auxiliary supports for elements for tubes or tube-assemblies
F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
A compressor (32) includes a shaft (101), a motor (50) configured to drive the shaft (101) into rotation, and a thrust bearing (100) configured to permit rotation of the shaft (101) and support an axial load of the shaft (101). The thrust bearing (100) is positioned about the shaft (101) and between the motor (50) and an impeller (102) of the compressor (32).
A heating, ventilation, and air conditioning (HVAC) system (10) includes an expansion device (36) disposed between a condenser (34) and an evaporator (38) of a vapor compression system (14) and a control panel (40) communicatively coupled to the expansion device (36). The control panel (40) is configured to: determine a liquid refrigerant level set point of the condenser (34) based on parameters of the vapor compression system (14), provide a first control signal to increase an opening of the expansion device (36) in response determining that the current liquid refrigerant level (82) in the condenser (34) is greater than a determined liquid refrigerant level set point of the condenser (34), and provide a second control signal to decrease the opening of the expansion device (36) in response to determining that the current liquid refrigerant level (82) in the condenser (34) is less than the determined liquid refrigerant level set point of the condenser (34).
In an embodiment of the present disclosure, a heating, ventilation, and air conditioning (HVAC) system includes a refrigerant loop configured to flow a refrigerant and a purge system configured to purge the HVAC system of non-condensable gases (NCG). The purge system includes a purge heat exchanger configured to receive a mixture of the NCG and the refrigerant. The purge heat exchanger is configured to separate the NCG of the mixture from the refrigerant of the mixture utilizing a chilled fluid. The purge system also includes a thermoelectric assembly configured to remove heat from the chilled fluid.
F25B 6/04 - Compression machines, plants or systems, with several condenser circuits arranged in series
F25B 7/00 - Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
F25B 21/02 - Machines, plants or systems, using electric or magnetic effects using Nernst-Ettinghausen effect
F25B 25/00 - Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups
F25B 29/00 - Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
F25B 43/04 - Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for withdrawing non-condensible gases
F25B 5/04 - Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
F25D 17/02 - Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
95.
CAPACITY CONTROL TECHNIQUE WITH MOTOR TEMPERATURE OVERRIDE
A control system (122) includes processing and memory circuitry, the memory circuitry storing a temperature-based capacity control scheme (200) for a chiller system (14) and the processing circuitry being configured to perform the temperature-based capacity control scheme (200). The temperature-based capacity control scheme (200) is performed as a function of a monitored temperature in a motor (50) configured to drive a compressor (32) of the chiller system (14), a first temperature threshold corresponding to the monitored temperature, and a second temperature threshold corresponding to the monitored temperature higher than the first temperature threshold.
Thermostat (22) including one or more temperature sensors configured to measure a plurality of temperature values within a building. The thermostat (22) can include a processing circuit coupled to the one or more temperature sensors. The processing circuit can receive the plurality of measured temperature values from the one or more temperature sensors. The processing circuit can determine, based on a time invariant Non-Linear Least Squares (NLSQ) technique and the plurality of measured temperature values, a compensated temperature value within the building, wherein the compensated temperature value accounts for an unknown temperature state of the thermostat when the thermostat is turned on.
A hold-down device and assembly for securing and stabilizing one or more battery cells within a battery cell housing while reducing gaps between the walls of the battery cell housing and the battery cells within. In one embodiment, a hold-down device includes a wedge-shaped body including a first end and a second end opposite the first end, a planar surface between the first end and the second end, and a toothed surface between the first end and the second end and opposite the planar surface. In one embodiment, a hold-down assembly includes a planar central portion configured to be coupled to the battery cell, the planar central portion having a first end and a second end opposite the first end, a first toothed element at the first end, and a second toothed element at the second end.
A thermostat is disclosed. The thermostat can include one or more temperature sensors configured to measure one or more temperature values. The thermostat can include a processing circuit. The processing circuit can receive the one or more temperature values from the one or more temperature sensors. The processing circuit can receive one or more central processing unit (CPU) usage values, wherein the one or more CPU usage values indicate computing usage of the processing circuit. The processing circuit can determine, based on an empirical model comprising one or more gain values and one or more filters and based on one or more signals, a temperature of the building. The one or more signals comprise the one or more temperature values and the one or more CPU usage values. The empirical model accounts for dynamics of heat generated by the processing circuit and airflow acting on the thermostat.
The present disclosure includes a thermostat for controlling HVAC equipment of a building based on occupancy of the building. The thermostat includes an occupancy sensor configured to detect a presence of an occupant. The thermostat includes a processing circuit. The processing circuit can receive occupancy data for one or more points in time from an occupancy sensor. The occupancy data indicates the presence of an occupant at the one or more points in time. The a processing circuit can train an occupancy model based on the occupancy data, wherein the occupancy model predicts a probability of the presence of the occupant
patents
