Patent ID: 7293425
Filing Date: 2007-11-13
Classification: F25B,Y02B

Abstract:
1. A thermo-siphon chiller refrigerator for use in cold districts comprising an outdoor heat exchanger functioning as a condenser, an indoor heat exchanger functioning as an evaporator located at a position lower than that of said outdoor heat exchanger, a compressor, and an expansion valve, wherein a refrigerant vapor passage connecting said indoor heat exchanger to said outdoor heat exchanger and a refrigerant liquid passage connecting said outdoor heat exchanger to said indoor heat exchanger by way of said expansion valve, these passages forming a natural circulation passage of refrigerant, are provided to allow a thermo-siphon cycle or natural refrigerant-circulation cycle to be performed, a forced circulation passage of refrigerant with said compressor disposed between said indoor heat exchanger and outdoor heat exchanger is formed to allow a vapor compression refrigerating cycle to be performed, whereby the thermo-siphon chiller refrigerator can accommodate to both high and low outside air temperatures; and said indoor heat exchanger is of a flooded type evaporator, an evaporation pressure adjusting valve is provided downstream from the evaporator, and said outdoor heat exchanger is located so that the refrigerant outlet thereof is positioned higher than the liquid level of said flooded type evaporator.