High speed freezing system for a refrigerator

Details High speed freezing system for a refrigerator High speed freezing system for a refrigerator

1981-09-29

1983-06-28

Makay, Albert J.

Refrigeration

Automatic control

Time or program actuator

62163, 62198, 62231, G05D 2332, F25D 2900

Patent

active

043898548

ABSTRACT:
A high speed freezing apparatus in use for a refrigerator. In the freezing apparatus, evaporators for the cold and freezing chambers are coupled in a series relation with respect to a compressor. An electromagnetic valve is provided in parallel with the evaporator for the cold chamber. When a high speed freezing start signal is produced from an operating section mounted on a front panel of a door for the freezing chamber, a timer circuit provided in a control section is operated. An operating condition of the compressor is detected by a detecting transformer and a given signal is produced from a start-failure preventing circuit. The start signal is transferred through a gate circuit to a relay portion only during the time that the given signal is transmitted to a gate circuit. Through the relay portion, the compressor and the electromagnetic valve are driven, so that the refrigerant is supplied to only the evaporator for the freezing chamber to start the high speed freezing operation. The time period of the high speed freezing operation is controlled by a timer circuit.

REFERENCES:
patent: 3001378 (1961-09-01), Stutrud
patent: 4128854 (1978-12-01), Ruminsky
patent: 4142375 (1979-03-01), Abe et al.
Kawashima et al., "Microcomputer Controlled Freezer-Refrigerator," Toshiba Review, No. 129, Sep.-Oct. 1980, pp. 36-40.

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