Control circuit for a refrigerating system

Details Control circuit for a refrigerating system Control circuit for a refrigerating system

1994-04-08

1996-02-06

Tanner, Harry B.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

62229, 62230, 361 22, 361 24, F25B 4902

Patent

active

054888344

ABSTRACT:
Control circuit for a refrigerating system, used in hermetic compressors, comprising first and second temperature sensors (61,62) and a current sensor (63) for the current drawn by the motor, said control circuit including a central processing unit (30), which instructs at least the selective closing of first and second driving switches (40,50), which are respectively connected with a main winding (11) and with a starting winding (12) of an electric motor (10), when the first temperature sensor (61) detects a temperature inside the refrigerating cabinet corresponding to a maximum value of an ideal temperature interval, previously informed to the central processing unit (30), the temperature of the motor (10) and the current drawn by said motor (10) being within their respective ideal operative values, previously informed to said central processing unit (30).

REFERENCES:
patent: 3633073 (1972-01-01), Day, III
patent: 3742303 (1973-06-01), Dageford
patent: 3874187 (1975-04-01), Anderson
patent: 4653285 (1987-03-01), Pohl
patent: 4709292 (1987-11-01), Kuriyama et al.
patent: 4968338 (1990-11-01), Sugiyama
patent: 5209075 (1993-05-01), Kim

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