METHOD AND SYSTEM FOR REDUCING THE POSSIBILITY OF VEHICLE HEAT EXCHANGER FREEZING

摘要

Methods and systems for reducing the possibility of heat pump evaporator fin freezing are described. Evaporator fin temperature is compared to a threshold temperature that varies with vehicle operating conditions. Actions to mitigate evaporator fin freezing may be taken if evaporator fin temperature is less than the threshold temperature.

主权项

1. A method for operating a vehicle climate control system, comprising:
adjusting a temperature threshold in response to a position of grille shutters; judging whether or not evaporator fins are expected to freeze in response to the position of grille shutters; and performing an action to reduce a possibility of the evaporator fins freezing.