Method for deicing an outside air side heat exchanger of a motor vehicle air conditioning system with heat pump and motor vehicle air conditioning system for carrying out the method

摘要

In a method for de-icing an air-side heat exchanger (14) of a motor vehicle air conditioning system with heat pump, with the need for both a cooling function and a heating function for the vehicle interior can be provided, wherein in the method during a heating operation upon detection or estimation of a predetermined degree of icing of the outside air side heat exchanger (14) is temporarily switched to a cooling operation to cause a wholly or partially defrosting of the ice on the outside air side heat exchanger (14), one or more of the following measures are provided to maintain the vehicle interior heating during the de-icing process: a) supply of heat a PCM latent heat storage (24) to the vehicle interior and / or b) switching the ventilation system in a recirculation mode, and / or reducing the indoor air circulation and / or c) reduction of the outside air side heat exchanger (14 ) flowing air, for example by closing a grille shutter, and / or d) increasing the temperature of the outside air side heat exchanger (14) flowing air. This counteracts a heating-related range loss in an electric vehicle by minimizing the required electric heating power.