Refrigeration defrost system

Details Refrigeration defrost system Refrigeration defrost system

F - Mech Eng,Light,Heat,Weapons

25

D

F25D 21/06 (2006.01) F25B 5/02 (2006.01) F25B 47/02 (2006.01)

Patent

CA 2433955

A refrigeration defrost system includes a frosted evaporator with an evaporator refrigerant vapor line and an evaporator refrigerant liquid line. A compressor with a suction inlet and a discharge outlet are both connected to a discharge manifold. The discharge outlet is connected to the evaporator refrigerant vapor line. A pressure regulator valve is located in a refrigerant bypass passageway between the discharge manifold and the suction inlet line and feeds refrigerant vapor, when a defrost cycle is required, from the discharge manifold into the suction inlet. A check valve is connected in series with the regulator valve to stop low pressure refrigerant vapor from the evaporator refrigerant vapor line from feeding into the suction inlet. The refrigerant vapor is fed from the compressor into the discharge outlet and into the evaporator through the evaporator refrigerant vapor line, which defrosts the evaporator.

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