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1. 发明授权

US5337576A Refrigerant and H.V.A.C. ducting leak detector 失效
标题翻译：制冷剂和H.V.A.C. 管道检漏仪
公开(公告)号：US5337576A
公开(公告)日：1994-08-16
申请号：US997316
申请日：1992-12-28
申请人： Donald Dorfman , Frank Poma
发明人： Donald Dorfman , Frank Poma
IPC分类号： F25B49/00 , G01M3/32 , G08B19/00
CPC分类号： F25B49/005 , G01M3/3227 , F25B2500/222
摘要： An apparatus for detecting a loss of refrigerant and air pressure in a refrigeration/heat pump system having a low pressure refrigerant line and H.V.A.C. ducting, the apparatus comprising: a pressure switch fluidly communicating with the low pressure refrigerant line, responsive to pressure changes therein; a vacuum pressure switch fluidly communicating with a portion of the H.V.A.C. ducting, responsive to air pressure loss therein; a signaling circuit having an enabling DC power supply, operatively associated with the pressure switch and vacuum pressure switch, and two pairs of green and red LEDS for conveying to the operator when the refrigerant pressure drops below a predetermined valve indicating a refrigerant loss or clogged, dirty condenser or evaporator coils, and when air pressure within the H.V.A.C. ducting falls below a predetermined value, indicating a dirty air filter in need of replacement, and a housing for the signaling circuit and respective LED assembly, the signaling circuit including a normally open reed switch which may be selectively enabled by the operator by placing a magnet on the external periphery of the housing.
摘要翻译：一种用于检测具有低压制冷剂管线和H.V.A.C.的制冷/热泵系统中的制冷剂损失和空气压力的装置。该装置包括：响应于其中的压力变化而与低压制冷剂管线流体连通的压力开关; 与H.V.A.C.的一部分流体连通的真空压力开关管道，响应其中的空气压力损失; 具有可操作地与压力开关和真空压力开关相关联的启用DC电源的信号电路和两对绿色和红色LEDS，用于当制冷剂压力降低到指示制冷剂损失或堵塞的预定阀门以下时向操作者输送，脏的冷凝器或蒸发器盘管，以及HVAC内的空气压力管道低于预定值，表示需要更换的脏空气过滤器，以及用于信号电路和相应LED组件的壳体，信号电路包括常开簧片开关，其可由操作者通过放置磁体在外壳的外围。

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