Method and apparatus for refrigerator defrost

Details Method and apparatus for refrigerator defrost Method and apparatus for refrigerator defrost

1982-05-10

1983-12-20

Makay, Albert J.

Refrigeration

Processes

Defrosting or frost inhibiting

62277, 62149, F25B 4100

Patent

active

044209436

ABSTRACT:
A method and apparatus for defrosting or removing ice from the outside of the evaporator of a refrigerator or heat pump. An additional inventory of refrigerant in thermal communication with a thermal mass is pressurized to substantially the same pressure as the condenser. After the compressor is deactivated at the end of a cooling cycle, a valve separating the inventory and evaporator is opened whereby the respective pressures rapidly equalize to an intermediate pressure. The inventory of refrigerant boils in the reduced pressure thereby drawing heat from the thermal mass to support the process. The vaporized refrigerant flows through the valve to the evaporator and condenses in the relatively cool environment. The heat given off by the condensation process melts ice on the outside of the evaporator.

REFERENCES:
patent: 3064445 (1962-11-01), Gerteis
patent: 3343375 (1967-09-01), Quick
patent: 3736763 (1973-06-01), Garland

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