There is provided a mask provided with a latch that can maintain a latched state of fastening cords and suppress offsetting when the mask is worn. A latch (10) of a mask (1) is in the form of an oblong thin sheet, and includes a first latching part (20) for disengageably latching one fastening cord (4) of the mask (1) and a second latching part (30) positioned on the second end edge (14) side of the first latching part (20), having an insertion through hole (31) for inserting the other fastening cord (3) of the mask (1) in advance . The first latching part (20) has a guide channel (21) extending from the first lateral edge (11) and a first latching hole (22) connected to the guide channel (21), and the second latching part (30) has a second latching hole (32) communicating with the insertion through hole (31), and having an outer shape mailer than that, and the first latching hole (22) and the second latching hole (32) are directed in directions opposed to one another in a lateral direction (X).
A local air cleaner (1) is configured in such a manner that a uniform current of cleaned air discharged from an air current opening surface (23) and contacts an air contact surface (W) and flow to the outside of an open region, thereby maintaining the insides of a guide (3) and the open region at a cleanliness level higher than that of the remaining region. The local air cleaner (1) is provided with at least one of a device for measuring pressure within the guide (3) and pressure within a push hood (2), a device for measuring the level of cleanliness in the guide (3) or the open region, or a device for measuring the gap between the guide (3) and the air contact surface (W). In order to ensure the level of cleanliness, the local air cleaner (1) controls the flow speed of a uniform current of cleaned air discharged from the air current opening surface (23), the control being performed on the basis of the measurement result in such a manner that the flow speed can be accelerated or decelerated.
F24F 5/00 - Systèmes ou appareils de conditionnement d'air non couverts par ou
F24F 11/74 - Aménagements de commande ou de sécurité - Détails de construction de tels systèmes pour la commande de l’apport en air traité, p.ex. commande de la pression pour la commande du débit d'air ou de la vitesse de l’air
F24F 3/163 - Postes de travail en air pur, c. à d. zones sélectionnées à l'intérieur d'une enceinte dans lesquelles de l’air filtré est acheminé
B25H 1/20 - Etablis; Etagères ou supports portatifs pour disposer des outils portatifs ou des pièces à travailler avec possibilité de protéger l'aire de travail
B25J 21/02 - Boîtes à gants, c. à d. enceintes dans lesquelles les manipulations sont exécutées par des mains humaines dans des gants faisant partie de la paroi de l'enceinte; Gants de boîtes à gants
F24F 7/06 - Ventilation avec réseau de gaines à circulation d'air forcée, p.ex. par un ventilateur
The purified air discharge device comprises a push hood (2) comprising an air flow discharge surface (23) discharging a uniform purified air flow. The push hood (2) is provided with a lateral air discharger (28) for creating a purified air flow that collides against a surrounding wall that is formed as the push hood (2) is installed and that is situated close along the circumferential direction of the air flow discharge surface (23) of the push hood (2).
A local air purification device (1) is equipped with: a push hood (2) having an airflow opening surface (23) which discharges a purified uniform flow of air; and a guide (3), which is provided on the airflow opening surface (23) side of the push hood (2), and which extends from the airflow opening surface (23) side toward the downstream side of the uniform flow of air and forms an opening surface (31) at the downstream end. The push hood (2) is arranged such that the uniform flow of air discharged from the airflow opening surface (23) passes through the interior of the guide (3) and then collides with an air collision surface (W) downstream from the opening surface (31). With the guide (3) an open region is formed between the opening surface (31) and the air collision surface (W) by arranging the opening surface (31) at a distance from and facing the air collision surface (W). The purified uniform flow of air discharged from the airflow opening surface (23) collides with the air collision surface (W) and flows to the outside of the open region, and thus the interior of the guide (3) and the interior of the open region have higher purity than other regions.
A local air purification device (1) is provided with: push hoods (2, 3) having air flow opening faces (23) for discharging purified uniform air flows; and a pair of guides (4, 5) forming opening faces (41, 51) at downstream end sections of the pair of guides (4, 5), the pair of guides (4, 5) being provided on the sides of the push hoods (2, 3) which face the air flow opening faces (23) and extending from the air flow opening face (23) sides toward the downstream sides of the uniform air flows. The push hoods (2, 3) are disposed in such a manner that the respective air flow opening faces (23) face each other. The opening faces (41, 51) of the guides (4, 5) are made to face each other at an interval to form an open region between the opening faces (41, 51) of the guides (4, 5). Purified uniform air flows which are discharged from the air flow opening faces (23) hit each other within the open region and flow to the outside of the open region, and this causes the inside of the guides (4, 5) and the inside of the open region to have a higher level of cleanliness than other regions.
An air blowing device adapted to be used in such a manner that at least two of the devices are horizontally and/or vertically aligned with each other, thereby to obtain a uniform flow of air in the downstream direction from device to device. An air-permeable front surface (11f) is formed to the blowing device (1) at the downstream side of a rectifier mechanism, and side surface sections (11a) which extend in the upstream direction of the device (1) are formed at both edges of the air-permeable front surface (11f ) . First ventilation holes (70a) are distributed at the air-permeable front surface (11f) , and second ventilation holes (70b) are distributed at the side surface sections (11a) .
Provided is a local clean zone forming apparatus which has an excellent operability and can provide an excellent clean air space without restricting the installation location or the purpose of an operation. In the local clean zone forming apparatus, a pair of push hoods having air blowing surfaces between which an airflow alignment mechanism is formed to form uniform airflows, are disposed so that the uniform airflows discharged from the push hoods are opposite to and collide with each other in a positional relationship wherein the air blowing surfaces are parallel to each other, and the centers of the air blowing surfaces are not directly opposite to each other; and the uniform airflows are obliquely discharged at an angle with respect to the air blowing surfaces.
The present invention aims to provide a sheet of microfiber assembly having a high filtering performance suitable as an oil-mist filter. A sheet of microfiber assembly 2 comprises microfibers 1 each having a fiber diameter of 3,000nm or less and is formed of a mixture of water-insoluble but alcohol-soluble acetalized polyvinyl alcohol resin and water-insoluble but alcohol-soluble fluorine resin.
D04H 1/728 - Non-tissés formés uniquement ou principalement de fibres coupées ou autres fibres similaires relativement courtes caractérisés par la méthode de formation des voiles ou couches, p.ex. par la réorientation des fibres les fibres étant disposées au hasard par électrofilage
B01D 39/08 - Tissus filtrants, c. à d. matériau tissé, tricoté ou entrelacé
In a mask device with blower, a sensor (15) for warning is disposed, which detects a movement position (d2) of an exhaust valve (7) corresponding to the case where an internal pressure of a face body is lower than an outer atmospheric pressure at the time of inhaling air in a non-contact state and outputs a signal. A warning device operates in accordance with a signal that is output from the sensor (15) for warning.
F16K 15/06 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés par tige-guide
F16K 37/00 - Moyens particuliers portés par ou sur les soupapes ou autres dispositifs d'obturation pour repérer ou enregistrer leur fonctionnement ou pour permettre de donner l'alarme
brevets
