Control method and device for vehicle air conditioning system

Abstract

The invention provides a control method and device for a vehicle air conditioning system, and the method comprises the steps: obtaining the temperature and humidity of air in a vehicle, and determining the dew point temperature according to the temperature and humidity of air in the vehicle; obtaining the temperature of vehicle window glass; calculating a temperature difference value between the dew point temperature and the window glass temperature, and determining a fogging possibility level according to the temperature difference value, the fogging possibility level representing a possibility degree that water vapor in the air in the vehicle is separated out and attached to the window glass; controlling an executing mechanism of the air conditioning system to execute a corresponding control strategy according to the fogging possibility level; wherein different fogging possibility levels correspond to different control strategies. When the difference between the temperature of the vehicle window glass and the dew point temperature is large, the air conditioning mechanism executes a corresponding gentle control strategy, and gentle temperature and humidity adjustment operation isconducted on air in the vehicle. Due to the fact that a gentle temperature and humidity operation strategy is adopted, the comfort of drivers and passengers can be improved.

Description

technical field [0001] The present application relates to the technical field of vehicle air-conditioning, in particular to a control method and device for a vehicle air-conditioning system. Background technique [0002] To meet application requirements, air conditioning systems are installed in vehicles. In practical applications, the functions of the air conditioning system include the following (1) and (2). [0003] (1) Adjusting the temperature of the air in the compartment to make the driver and passengers as comfortable as possible, such as adjusting the temperature, air velocity and flow direction of the air in the compartment. [0004] (2) When there are problems such as fog and frost on the surface of the window glass that affect the transparency of the windshield (that is, affecting the perception of the driver and passengers or the camera in the car to the environment outside the window), turn on the defrosting and defogging mode to remove the frost and fog, and ...

AI Technical Summary

Problems solved by technology

[0005] At present, when the automatic air conditioner is used in the vehicle, the fog can be quickly removed only by adjusting the temperature of the cabin and the flow direction of the air flow, and opening the defogging strategy, which cannot meet the needs of the people in the car; The defrosting mode will also have a serious impact on the riding experience of drivers and passengers

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