Refrigeration cycle device having accurate refrigerant deficienc

Details Refrigeration cycle device having accurate refrigerant deficienc Refrigeration cycle device having accurate refrigerant deficienc

1996-12-20

1998-02-03

Tanner, Harry B.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

62158, 62129, F25B 4900

Patent

active

057132135

ABSTRACT:
Deficiency in the amount of a refrigerant in a refrigeration cycle device is determined based on the amount of decrease in the temperature of an evaporator after a predetermined time period elapses since the actuation of a compressor. The execution of the process for determining deficiency in the amount of refrigerant is prohibited for predetermined time period after the deactuation of the compressor. Therefore, when the temperature of the evaporator does not increase enough after the compressor is actuated, erroneous determination that there is a deficiency in the refrigerant amount can be reliably prevented. In this way, deficiency in the amount of refrigerant in the refrigeration cycle can always be properly determined based on an amount of decrease in the temperature of the evaporator.

REFERENCES:
patent: 4829777 (1989-05-01), Matsuoka et al.
patent: 5009074 (1991-04-01), Goubeaux et al.
patent: 5150584 (1992-09-01), Tomasov et al.
patent: 5243829 (1993-09-01), Bessler
patent: 5301514 (1994-04-01), Bessler

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