Process and arrangement for an air conditioner control with an evaporator protected against icing

摘要

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.