Volkswagen Ag

Jochen Westhäuser

Jan-Christoph Albrecht

Sven Twenhövel

Carsten Wachsmuth

A method for initiating a defrosting process of a heat exchanger of a heat pump of a motor vehicle, wherein a fan is assigned to the heat exchanger, wherein the power consumption and/or the speed of the fan is monitored, a defrosting process is initiated when the power consumption and/or the speed exceeds and/or falls below a threshold value, and the threshold value is determined as a function of a parameter, wherein the parameter is an indicator of a current relative air speed of the ambient air in relation to the motor vehicle.

Method for initiating a defrosting process of a heat exchanger of a heat pump of a motor vehicle

A method for initiating a defrosting process of a heat exchanger of a heat pump of a motor vehicle, wherein the heat exchanger and a coolant heat exchanger of a cooling circuit of the motor vehicle are arranged in a common air path, involves determining a coolant outlet temperature of a coolant from the coolant heat exchanger, determining a state of icing of the heat exchanger using the coolant outlet temperature, and initiating a defrosting process of the heat exchanger if icing of the heat exchanger is determined.

Method for initiating a defrosting process of a heat exhanger of a heat pump of a motor vehicle and a corresponding motor vehicle

The invention relates to a method for operating a climate-control system () for a vehicle (). According to the invention, total energy efficiencies are determined for a group of operating strategies for the air-conditioning system () and an operating strategy with the greatest total efficiency that fulfills the heating output requirement () that has been determined, is selected.

Method for operating an air-conditioning system for a vehicle

In order to provide a method for de-icing a heat exchanger of a motor vehicle, which prevents large amounts of melt water from a defrosting process running onto the floor or the road beneath the motor vehicle, freeze again and pose a risk of injury to pedestrians, in a method for defrosting a heat exchanger of a motor vehicle, in which, for a heat exchanger arranged in a motor vehicle, a defrosting process for removing a layer of frozen water or frost formed on a surface of the heat exchanger is carried out, the defrosting process comprising heating the surface, and melt water being produced, it is proposed that the amount of melt water discharged onto a local region of a floor beneath the motor vehicle is limited to a maximum value.

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Braunschweig, Germany

Jochen Westhäuser