Refrigerating system with compressor cooled by liquid refrigerant

U.S. Patent Number: 5381665

Abstract: The present invention aims at providing a refrigerating system capable of cooling a compressor stably using a liquid injection circuit even when defrosting of an evaporator is performed using a gaseous refrigerant of high pressure. The refrigerating system comprises a compressor having a refrigerant discharge side and a refrigerant suction side; a condenser connected to the discharge side of the compressor; a receiver tank connected to a refrigerant outlet side of the condenser; an evaporator connected between a refrigerant outlet side of the receiver tank and the suction side of the compressor; a defrosting circuit which supplies a gaseous refrigerant obtained by gas-liquid separation in the receiver tank to the evaporator to defrost the evaporator; and a liquid injection circuit which supplies a liquid refrigerant obtained by gas-liquid separation in the receiver tank to a low pressure side in the interior of the compressor.

Inventors: Tanaka; Tsutomu (Ohta, JP)

Assignee: Sanyo Electric Co., Ltd. (Moriguchi, JP)

Application Number: 08/164,633

Issued: 1995-01-17

Expired: 2007-01-17

Classes: 62/197 ; 62/278; 62/509

Field of search: 62/278,196.3,196.4,197,505,509,81

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