Return air adjusting and control method for air conditioner of electric car and air conditioner system thereof

Abstract

The invention discloses a return air adjusting and control method for an air conditioner of an electric car and an air conditioner system thereof. The method comprises the following steps: an electric ventilation door installed at the joint among a supply duct, a fresh air duct and a return duct gradually closes the fresh air duct and opens the return duct and return ratio is gradually increased through a fresh air state; a mist formation dictator of electric current or a relative humidity sensor installed at the inner surface of a glass window in the front of the car respectively collects electric current or relative humidity signals; a data processing module adjusts the electric ventilation door according to the electric current or the relative humidity signals and preset threshold values of mist formation to guarantee the maximal return ratio under a state that the glass window in the front of the car does not form mist. The method and the air conditioner system can use the return air as much as possible under the condition that the glass window in the front of the car does not form mist, and especially can effectively reduce thermal load indoors under the working condition of heating in winter.

Description

technical field [0001] The invention relates to a return air adjustment control method and a device for an automobile air-conditioning system. More specifically, it relates to a return air adjustment control method and device for an electric vehicle air conditioning system. Background technique [0002] The air-conditioning system on electric vehicles consumes a large amount of energy consumption of the battery, especially in winter heating mode, which seriously affects the cruising range of electric vehicles. Using return air to reduce the heat load in the vehicle compartment is an effective means of saving battery energy consumption. However, the high moisture content of the return air will make the window glass more prone to fogging and affect driving safety. The fogging of the window glass is the primary problem that needs to be solved when the air conditioning system uses the return air. [0003] The process of using the return air will gradually increase the moisture...

AI Technical Summary

Problems solved by technology

However, the high moisture content of the return air will make the window glass more prone to fogging and affect driving safety. The fogging of the window glass is the primary problem that needs to be solved when the air conditioning system uses the return air

[0003] The process of using the return air will gradually increase the humidity content of the air in the car interior, which will also make the temperature in the car interior too high and affect the comfort of the car interior environment.

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