Refrigerator

Details Refrigerator Refrigerator

1993-11-15

1995-10-24

Tanner, Harry B.

Refrigeration

Automatic control

Of external fluid or means

62153, 62154, F25D 1706

Patent

active

054600103

ABSTRACT:
In a refrigerator, the inner space of a heat insulated housing is divided to form a refrigerating compartment, a freezer compartment, and a vegetable compartment. A projection which contacts with the back of a cooler cover and divides the space behind the cooler cover into two chambers arranged in a lateral direction is formed on a back wall portion. The space enclosed by the projection, the cooler cover, and the housing is formed as a cold air passage for guiding cold air of the refrigerating compartment to the vegetable compartment. A damper device has a shutter plate, a bias spring which urges the shutter plate toward a cold air duct, and a shape memorizing alloy coil spring on which a heater is wound. A weak current is always supplied from a damper control device to the heater so that the temperature of the shape memorizing alloy coil spring is maintained at the Ms point (martensite phase transition start temperature) or higher under the state where the shutter plate is lifted up. A defrosting control device for controlling the electric power supply to a defrosting heater has an operation integrating counter for integrating the operation time period of a compressor, converting means for converting the open/close frequency of doors into a time period, and a door-closure counter for measuring a time period of a door-closure state.

REFERENCES:
patent: 3839878 (1974-10-01), Tilmanis
patent: 3890798 (1975-06-01), Fujimoto et al.
patent: 4299095 (1981-11-01), Cassarino
patent: 4481785 (1984-11-01), Tershak et al.
patent: 4569206 (1986-02-01), Mitani et al.
patent: 5014520 (1991-05-01), Orner et al.

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