Refrigerator with a malfunction detection system

Details Refrigerator with a malfunction detection system Refrigerator with a malfunction detection system

1988-03-07

1989-08-01

Tanner, Harry B.

Refrigeration

With indicator or tester

Position or extent of motion of movable element

62155, 62187, F25B 4900, F25D 1704

Patent

active

048523615

ABSTRACT:
A refrigerator comprises a damper controlling inflow of cold air into a compartment thereof, a temperature sensor for detecting the temperature within the compartment, a damper drive device for driving the damper in accordance with the detected temperature in the compartment, a damper position detection device for detecting the open state and the closed state of the damper, a heater for defrosting the damper, an abnormality detection device, and a malfunction detection device. The abnormality detection device monitors the time that the damper drive device drives the damper, and when the driven time reaches a predetermined value, energizes the heater to defrost the damper. The malfunction detection device monitors the time that the heater is energized, and when the energization time of the heater reaches a predetermined value, deenergizes the heater.

REFERENCES:
patent: 4392358 (1983-07-01), Hicks
patent: 4553400 (1985-11-01), Branz
patent: 4665710 (1987-05-01), Kyzer et al.
patent: 4688393 (1987-08-01), Linstromberg et al.
patent: 4689966 (1987-09-01), Nonaka
patent: 4691195 (1987-09-01), Sigelman et al.

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