Refrigeration – Automatic control – Refrigeration producer
Patent
1992-02-03
1992-10-20
Wayne, William E.
Refrigeration
Automatic control
Refrigeration producer
236 80R, F25B 500
Patent
active
051560160
ABSTRACT:
A refrigerant flow switching device for alternatively conveying flow of refrigerant from either a high presure or a low pressure evaporator to a compressor of a refrigeration system and a refrigerator using such a refrigeration system. The device utilizes the pressure difference between the higher pressure refrigerant from the high pressure evaporator and the lower pressure refrigerant from the low pressure evaporator or atmospheric pressure to open and close a first flow controller of the device positioned in a conduit leading from the high pressure evaporator to the compressor. The device further comprises a second flow controller, such as a check valve positioned in a conduit leading the low pressure evaporator to the compressor, which stays open only when the first flow controller is closed. The first flow controller comprises a bellows which is expanded from a first position to a second position by the pressure of refrigerant from the high pressure evaporator against a constant force provided by a compression spring, positioned against the bellows. The bellows attached through "U" shaped preloaded springs to a gate having an orifice causes the gate orifice to snap open or close when the bellows expands or compresses respectively for either allowing or preventing flow of refrigerant from the high pressure evaporator to the compressor.
REFERENCES:
patent: 2123497 (1938-07-01), Buchanan
patent: 2182318 (1939-12-01), Newill
patent: 4910972 (1990-03-01), Jaster
patent: 4918942 (1990-04-01), Jaster
patent: 4966010 (1990-10-01), Jaster et al.
patent: 5056328 (1991-10-01), Jaster et al.
Marks' Standard Handbook for Mechanical Engineers Theodor Baumeister, Editor-in-Chief, Eighth Edition - McGraw-Hill Book Company.
Article - Refrigeration and Air Conditioning, W.F. Stoecker - McGraw-Hill Book Company (1958) pp. 56-61.
General Electric Company
Pittman William H.
Wayne William E.
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