To supply sufficient amount of lubrication oil to a compressor, even when an ejector cycle continues to be operated continuously for a long time.
An oil return piping 510, which returns the lubrication oil separated from a refrigerant inside a gas-liquid separator 500 to the suction side of the compressor 100, is installed. Herewith, since sufficient amount of lubrication oil can be supplied to the compressor 100, even when the ejector cycle continues to be operated continuously over a long time, the compressor 100 can be prevented from seizing due to shortage of the lubrication oil. Also, since a liquid refrigerant, which must be normally sucked into the side of an evaporator 300, can be prevented from being sucked into the side of the compressor 100 and the amount of the lubrication oil sucked into the evaporator 300 can be reduced, resulting reduction in the amount of the liquid refrigerant sucked into the evaporator 300 is prevented and lowering of the refrigeration capacity (endothermic amount) generated in the evaporator 300 can be prevented.
TAKEUCHI HIROTSUGU
MAKITA KAZUHISA
TAKEUCHI MASAYUKI
ISHIKAWA HIROSHI
JP2002130874A | 2002-05-09 | |||
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