Process and arrangement for an air conditioner control with an e

Details Process and arrangement for an air conditioner control with an e Process and arrangement for an air conditioner control with an e

1998-08-24

1999-11-30

Tanner, Harry B.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62227, 62157, F24B 4902

Patent

active

059921633

ABSTRACT:
A process and an arrangement for controlling an air conditioner utilize an evaporator protected against icing and a refrigerant circulating system which includes at least one compressor and the evaporator. The evaporator temperature is sensed continuously and the compressor is deactivated when the evaporator temperature falls below a defined switch-off temperature. The compressor is activated again when the evaporator temperature exceeds a defined switch-on temperature which is at least equal to the switch-off temperature. The evaporator temperature gradient is determined by a corresponding control unit from the continuous sensing of the evaporator temperature. The switch-off temperature is variably defined as a function of the determined temperature gradient and is selected so as to rise with a negative evaporator temperature gradient, having an amount which increases, during operating phases with an activated compressor and/or with a falling positive evaporator temperature gradient during operating phases with a deactivated compressor.

REFERENCES:
patent: 4856293 (1989-08-01), Takahashi
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patent: 5218836 (1993-06-01), Jarosch
patent: 5467605 (1995-11-01), Hennessee et al.
patent: 5826439 (1998-10-01), Baruschke et al.
"Verdampfer-Abtauung--am Beispiel von Heizwarmepumpen," J. Reichelt, Ki Klima, Kalte, Heizung, Feb. 1987, pp. 72-75.
"Automatik in Kalteanlagen: Abtau-Systeme," Gunter E. Wegner, Die Kalte und Klimatechnik, Sep. 1988, pp. 394, 396, 398, 400, 402, 404, 409 and 410.

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