(1) Ceiling fans; ventilating fans
(2) Electric fans; ventilating fans for commercial and industrial use; ventilating fans for the mixing of air in large spaces; destratification fans.
(1) Ceiling fans; ventilating fans
(2) Electric fans; ventilating fans for commercial and industrial use; ventilating fans for the mixing of air in large spaces; destratification fans
A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device includes calculating a field subcooling of the field refrigeration system as a function of a measured field liquid line pressure and a measured field liquid line temperature. A charge adjustment percentage can be calculated as a function of the field subcooling, a measured field indoor wet bulb temperature, and a measured field outdoor dry bulb temperature. A refrigerant adjustment weight can be determined based on the charge adjustment percentage. A field refrigeration system charge can be adjusted by the refrigerant adjustment weight.
A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device includes calculating a target superheat as a function of one or more of a measured field outdoor dry bulb temperature, and a measured field indoor wet bulb temperature. A charge adjustment percentage can be calculated as a function of the target superheat. A refrigerant adjustment weight can be determined based on the charge adjustment percentage. A field refrigeration system charge can be adjusted by the refrigerant adjustment weight.
A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device includes calculating a target superheat as a function of one or more of a measured field outdoor dry bulb temperature, and a measured field indoor wet bulb temperature. A charge adjustment percentage can be calculated as a function of the target superheat. A refrigerant adjustment weight can be determined based on the charge adjustment percentage. A field refrigeration system charge can be adjusted by the refrigerant adjustment weight.
A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device includes calculating a field subcooling of the field refrigeration system as a function of a measured field liquid line pressure and a measured field liquid line temperature. A charge adjustment percentage can be calculated as a function of the field subcooling, a measured field indoor wet bulb temperature, and a measured field outdoor dry bulb temperature. A refrigerant adjustment weight can be determined based on the charge adjustment percentage. A field refrigeration system charge can be adjusted by the refrigerant adjustment weight.
A method for controlling an air conditioning system comprises routing refrigerant through an evaporator to cool air in a space, proportioning refrigerant flow from the evaporator between a condenser circuit and a hot gas reheat circuit that heats air leaving the evaporator, routing refrigerant flow from the condenser circuit and the hot gas reheat circuit through an expansion device and back to the evaporator, monitoring a first temperature at the evaporator, stabilizing proportioning of refrigerant flow between the condenser circuit and the hot gas reheat circuit based on the monitored first temperature.
F25B 49/00 - Disposition ou montage des dispositifs de commande ou de sécurité
F25B 49/02 - Disposition ou montage des dispositifs de commande ou de sécurité pour machines, installations ou systèmes du type à compression
F25B 6/02 - Machines, installations ou systèmes à compression, avec plusieurs circuits de condenseurs disposés en parallèle
F24F 3/153 - Systèmes de conditionnement d'air dans lesquels l'air conditionné primaire est fourni par une ou plusieurs stations centrales aux blocs de distribution situés dans les pièces ou enceintes, blocs dans lesquels il peut subir un traitement secondaire; Appareillage spécialement conçu pour de tels systèmes caractérisés par le traitement de l'air autrement que par chauffage et refroidissement par déshumidification avec chauffage subséquent, c. à d. dans lesquels l'air, porté au degré d'humidité voulu dans la centrale, traverse un élément de chauffage pour atteindre la température désirée
41 - Éducation, divertissements, activités sportives et culturelles
Produits et services
(1) Printed publications, namely, training manuals for heating, ventilating, and air conditioning (HVAC) technical and business training. (1) Educational services, namely, heating, ventilating, and air conditioning (HVAC) technical and business training.
11.
Heat pumps with unequal cooling and heating capacities for climates where demand for cooling and heating are unequal, and method of adapting and distributing such heat pumps
Heat pumps for climates where demand for cooling and heating are unequal and methods of adapting and distributing heat pumps for such climates. Heat pumps include a compressor, compressor motor, variable-speed drive, and controller. In a number of embodiments, non-volatile memory stores sets of constant speeds for cooling and heating, and a person can select, via an input device, different sets of speeds for cooling and heating to provide the different cooling and heating capacities. The controller then operates the unit at the selected speeds, selecting from within the set based on demand for cooling or heating. In some embodiments, different sets of speeds may have the same minimum speed but different maximum speeds. Identical heat pumps can be configured to have different capacity ratings and different advertized efficiencies for different climates.
41 - Éducation, divertissements, activités sportives et culturelles
Produits et services
Printed publications, namely, training manuals for heating, ventilating, and air conditioning (HVAC) technical and business training Educational services, namely, heating, ventilating, and air conditioning (HVAC) technical and business training
13.
Refrigerant charge management in a heat pump water heater
Heat pumps that heat or cool a space and that also heat water, refrigerant management systems for such heat pumps, and methods of managing refrigerant charge. Various embodiments remove idle refrigerant from a heat exchanger that is not needed for transferring heat by opening a refrigerant recovery valve and delivering the idle refrigerant from the heat exchanger to an inlet port on the compressor. The heat exchanger can be isolated by closing an electronic expansion valve, actuating a refrigerant management valve, or both. Refrigerant charge can be controlled by controlling how much refrigerant is drawn from the heat exchanger, by letting some refrigerant back into the heat exchanger, or both. Heat pumps can be operated in different modes of operation, and various components can be interconnected with refrigerant conduit. Some embodiments deliver refrigerant gas to the heat exchanger and drive liquid refrigerant out prior to isolating the heat exchanger.
Heat pumps with improved defrost cycles and methods of defrosting heat exchangers, for example, having microchannel outdoor heat exchangers. A heat exchanger has three types of connection points that are used during a defrost cycle. Two connection points are used to deliver hot refrigerant gas to the heat exchanger and one connection point is where refrigerant exits the heat exchanger. Two of the connection points are at the same header and during at least part of the defrost cycle, at least part of the hot refrigerant gas is passed through that header without passing through any cross tubes of the heat exchanger. A defrost valve in a refrigerant conduit opens during the defrost cycle to deliver hot refrigerant gas to the connection point on the header. In a number of embodiments, the defrost valve is open only during a portion of the defrost cycle.
Heat pumps that heat or cool a space and that also heat water, refrigerant management systems for such heat pumps, methods of managing refrigerant charge, and methods for heating and cooling a space and heating water. Various embodiments deliver refrigerant gas to a heat exchanger that is not needed for transferring heat, drive liquid refrigerant out of that heat exchanger, isolate that heat exchanger against additional refrigerant flowing into it, and operate the heat pump while the heat exchanger is isolated. The heat exchanger can be isolated by closing an electronic expansion valve, actuating a refrigerant management valve, or both. Refrigerant charge can be controlled or adjusted by controlling how much liquid refrigerant is driven from the heat exchanger, by letting refrigerant back into the heat exchanger, or both. Heat pumps can be operated in different modes of operation, and segments of refrigerant conduit can be interconnected with various components.
F25B 27/00 - Machines, installations ou systèmes utilisant des sources d'énergie particulières
F25D 17/02 - Dispositions pour la circulation des fluides de refroidissement; Dispositions pour la circulation de gaz, p.ex. d'air, dans les enceintes refroidies pour la circulation des liquides, p.ex. de la saumure
F25B 7/00 - Machines, installations ou systèmes à compression fonctionnant en cascade, c. à d. avec plusieurs circuits, l'évaporateur d'un circuit refroidissant le condenseur du circuit suivant
F25B 29/00 - Systèmes de chauffage et de refroidissement combinés, p.ex. fonctionnant alternativement ou simultanément
air conditioners, air handlers, furnaces, heat pumps, and evaporator coils for heating, ventilation and air conditioning units, and thermostat controllers therefor sold together as a unit with any of the foregoing
17.
Heat pumps with unequal cooling and heating capacities for climates where demand for cooling and heating are unequal, and method of adapting and distributing such heat pumps
Heat pumps for climates where demand for cooling and heating are unequal and methods of adapting and distributing heat pumps for such climates. Heat pumps include a compressor, compressor motor, variable speed drive, and controller. In a number of embodiments, non-volatile memory stores sets of constant speeds for cooling and heating, and a person can select, via an input device, different sets of speeds for cooling and heating to provide the different cooling and heating capacities. The controller then operates the unit at the selected speeds, selecting from within the set based on demand for cooling or heating. In some embodiments, different sets of speeds may have the same minimum speed but different maximum speeds. Identical heat pumps can be configured to have different capacity ratings and different advertised efficiencies for different climates.
Air conditioning units packaged with condensing gas heat exchangers include a drain line connected to a collector attached to the heat exchanger. In different embodiments, the drain line, or a conduit for the drain line, may extend to the return duct opening for routing of the drain line through the return duct for disposal of the condensate, for instance, within the building, or the drain line may extend through a hole in the floor of the unit. The conduit may protect the drain line from direct heat from the heat exchanger, from freezing where the drain line passes through an outdoor section, or both. In some embodiments, air may be circulated through the conduit to prevent freezing. The conduit may guide the drain line through the unit, roof curb assembly, or roof, or the drain line may be routed through the unit by the manufacturer to the return duct opening.
Methods of controlling air conditioning and HVAC units using a thermostat for a discrete-speed unit that include changing speed based on how long the unit operates at a particular speed. Speed may be increased if a unit operates for longer than a predetermined time at a particular speed, and speed may be reduced if the unit operated for less than a specific amount of time during the prior run. In different embodiments, single-stage thermostats may control units that operate at three speeds, and two-stage thermostats may control units that operate at three to five or more speeds. In addition, in some embodiments, outdoor coil temperature may be measured and considered in determining speed. Further, in some embodiments, maintaining continuous or repeated operation at a boost speed may be avoided. Energy savings and noise reduction may result.
Premix furnace for heating an occupied space while producing lower NOx emissions and methods of mixing air and fuel delivered to a premix burner and of improving combustion stability. A mixing device may be located within an inlet tube, may have a flat surface that is perpendicular to the direction of fuel flow, or may have two surfaces held at substantially opposite angles to induce swirl. A mixing device may be attached to the fuel injector, may be made from a piece of sheet metal, and may have bends and a hole for attachment to the fuel injector. A fluidic diode in the inlet tube may improve combustion stability and may include a hollow frustum or a frustoconical portion, a cylinder concentric with the inlet tube, or a combination thereof. Some embodiments include refractory insulation lining the combustion chamber or may adjust for elevation or fuel characteristics.
HVAC units, namely, Unit Heaters, Air Turnover Heaters, Blower Cabinets for Heaters, Condensing Units for cooling indoor air, Direct Fired Heaters, Electric Heaters, Energy Recovery Ventilators, Evaporative Cooling, Gas Infrared, Packaged Heating/Cooling Makeup Air units, Hydronic Unit Heaters, Duct Furnaces, Packaged Indoor/Outdoor Heat/Cool units, and Used-Oil-Fired Heaters
22.
System and method for controlling an air conditioner or heat pump
A control procedure operates an expansion valve of an air conditioning system. The control procedure utilizes a first control procedure to bring a calculated superheat value within a range of a target superheat value, and a second control procedure to cause the calculated superheat value to match the target superheat value. Both the first and second control procedures preferably use Proportional, Integral, Derivative control algorithms.
Airflow rates within a ventilation system are controlled using motor speed or torque and motor electric current or pressure. Fan speed or torque may be varied to compensate for differing restriction in ductwork, and may provide a constant airflow rate over a range of varying airflow restriction. Air handlers or air conditioning units may be mass produced in common configurations, and installed in different buildings or structures with different ductwork configurations. Methods operate a fan motor at a present speed or torque, sample speed or torque, sample current of the fan motor or pressure within the ventilation system, calculate a present airflow rate within the ventilation system, calculate a new input setting using the present airflow rate and a target airflow rate, change the speed or torque to the new input setting, and repeat these steps to converge on the target airflow rate, often avoiding overshoot.
Heating and air conditioning systems comprising packaged air conditioning and heat pump units and components, namely, compressors, pumps, motors, and blowers
Metal chimneys. Oil, gas and electric furnaces, including those for mobile homes and travel trailers, heating duct registers, furnace-mounted himidifiers, stoves, and parts therefor, electric baseboard wall and under-cabinet heaters and air conditioners.
Power oil gun furnaces; power gas gun furnaces; atmospheric gas furnaces; electric furnaces; gun-type heating furnaces; atmospheric gas burners; power gas burners; air conditioning conversion blower packages; air conditioners, both self-contained and split system; parts and components of the above apparatus.
Power Oil Gun Furnaces; Power Gas Gun Furnaces; Atmospheric Gas Furnaces; Electric Furnaces; Atmospheric Gas Burners; Power Gas Burners; Air Conditioning Conversion Blower Packages; Air Conditioners, Both Self-Contained and Split System; Parts and Components of the Above Apparatus
OIL, GAS AND ELECTRIC FURNACES, INCLUDING THOSE FOR MOBILE HOMES AND TRAVEL TRAILERS, METAL CHIMNEYS, HEATING DUCT REGISTERS, FURNACE-MOUNTED HUMIDIFIERS, STOVES, AND PARTS THEREFOR; ELECTRIC BASEBOARD WALL AND UNDER-CABINET HEATERS AND AIR CONDITIONERS
