Vapor compression system with evaporator defrost system

Details Vapor compression system with evaporator defrost system Vapor compression system with evaporator defrost system

F - Mech Eng,Light,Heat,Weapons

25

B

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

Patent

CA 2510726

A vapor compression system including a refrigerant circuit having operably coupled thereto, in serial order, a compressor, a first heat exchanger, an expansion device, and a second heat exchanger. A valve is disposed within refrigerant circuit between first heat exchanger and expansion device, and has a first position and a second position. A defrost circuit having operably coupled thereto a third heat exchanger defines an inlet in fluid communication with refrigerant circuit through valve when valve is in second position, and an outlet disposed in refrigerant circuit between inlet and expansion device. A check valve is disposed in defrost circuit between third heat exchanger and outlet. The check valve allows refrigerant to return to refrigerant circuit through outlet and prevents refrigerant from entering third heat exchanger via outlet. The refrigerant flows through third heat exchanger and second heat exchanger when valve is in second position.

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