AIR CONDITIONING SYSTEM FOR AUTOMOTIVE VEHICLES

摘要

The present invention relates to an air conditioning system for a vehicle. An objective of the present invention is to improve a control structure of a vaporizer icing prevention device to improve icing prevention efficiency of a vaporizer, thereby improving cooling performance inside a vehicle and riding comfort inside the vehicle. To achieve the objective, the air conditioning system for a vehicle comprises a vaporizer to cool air blowing into a vehicle with a refrigerant supplied from a compressor. The vaporizer is controlled according to a predetermined target temperature. The air conditioning system for the vehicle further comprises: a first and a second temperature detection means installed on two specific portions on a surface of the vaporizer, of which the temperatures are different in order to measure the temperatures of the two portions, and separated from each other; and a control unit which stores a reference temperature variation for each target temperature of the vaporizer, calculates the temperature variations of the two portions on the surface of the vaporizer, inputted from the first and the second temperature detection means, compares the calculated temperature variations with the reference temperature variation corresponding to the current target temperature, and determines whether icing exists in the vaporizer according to a level of the calculated temperature variations when compared with the reference temperature variation.