PURPOSE: To automatically supply only a gas refrigerant to a compressor.
CONSTITUTION: A refrigerant circuit is constituted such that an evaporator 3, a refrigerant compressor 5 and a condenser 11 are connected by means of a refrigerant piping between a connection port 2, to which an equipment 1 undergoing recovery is connected, and a recovery bomb 12, in which a refrigerant from the equipment 1 undergoing recovery is stored. Provided between the evaporator 3 and the connection port 2 in the refrigerant circuit is an accumulator 10. A pressure valve provided on a refrigerant outlet side of the accumulator 10 and adapted to open at a predetermined pressure or less and a capillary tube 44 provided in a bypass pipe 43, of which an end is opened in a liquid refrigerant in the accumulator 10 in a manner to bypass the pressure valve, such that a pressure difference of the liquid refrigerant between both ends of the capillary tube becomes larger than a predetermined pressure upon operation of the refrigerant compressor 5, cause a flow rate of the refrigerant flowing to the evaporator 3 to be automatically adjusted depending upon a gas-liquid mixed condition of a refrigerant obtained through the connection port 2 from the equipment 1 undergoing recovery.
AKUTSU YASUTOMO
SHINSHI MIKIYASU
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