F - Mech Eng,Light,Heat,Weapons – 25 – B
Patent
F - Mech Eng,Light,Heat,Weapons
25
B
62/24
F25B 1/00 (2006.01) F25B 41/04 (2006.01) F25B 47/02 (2006.01) F25B 49/02 (2006.01) F25B 5/00 (2006.01)
Patent
CA 1093849
ABSTRACT OF THE DISCLOSURE Disclosed is a means for preventing "logging" of receivers, that is, the excess filling of a receiver with liquid in a refrigerator system of the type in which a compressor, a condensor, and one or more evaporators are connected in a closed cycle in association with a surge receiver. Communication between the discharge side of the compressor and the receiver incorporates a valve of the differential pressure regulating type, having means sensitive to the relationship of pressures established and main- tained in a liquid line extending from the condenser to the evaporator and in the compressor discharge line extending from the compressor to the condenser, respectively. The receiver valve responds to the pressure differential between these lines to maintain pressure in the receiver at a value slightly less than the maintained condensing pressure existing in the liquid line, to prevent excess liquid from accumulating in the receiver and in this way eliminate "starving" of the expansion valves associated with the evaporators. The disclosed means for establishing and maintaining receiver pressure in a preferred embodiment utilizes a capillary sensing element in association with a receiver pressure regulating valve. The element senses pressure in the liquid line upstream from an inlet pressure regulating valve. The inlet pressure regulating valve establishes and maintains an optimum condensing pressure and as a consequence thereof establishes the desired optimum differential between the pressures at the inlet and outlet sides of the condenser.
334113
Emhart Industries Inc.
Gowling Lafleur Henderson Llp
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