Reverse liquid defrost apparatus and method

Details Reverse liquid defrost apparatus and method Reverse liquid defrost apparatus and method

1998-01-12

1999-12-14

Tanner, Harry B.

Refrigeration

Processes

Defrosting or frost inhibiting

62278, F25B 4100

Patent

active

06000231&

ABSTRACT:
Method and apparatus for defrosting an evaporator in a closed loop refrigeration system are provided. In one embodiment, liquid is circulated from a receiver containing refrigerant through an evaporator in a reverse direction to normal flow and then to another evaporator in the system. Hot gas from a compressor may be used to displace the liquid to the evaporator being defrosted. Alternatively, gas from the top of the receiver may be used for displacement of the liquid. Steps are taken to insure that cold gas from the evaporator that is input to the compressor does not contain liquid. Apparatus making possible flow of liquid in reverse direction through an evaporator selected for defrosting and then to another evaporator is provided, along with apparatus for controlling the flow.

REFERENCES:
patent: 3427819 (1969-02-01), Seghetti
patent: 3633378 (1972-01-01), Toth
patent: 4083195 (1978-04-01), Kramer et al.

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