Abstract: Aiming at a certain type of automobile, the phenomenon of evaporator icing is reproduced through road test, and the control method of evaporator icing is studied accordingly. It is found that the evaporator icing is related to the position of the temperature controller and the setting parameters of the temperature controller. During the road test, by changing the position and parameter setting of the temperature controller, collecting relevant data of the air conditioning system at the same time, and selecting the most appropriate parameter setting of the temperature controller, the evaporator surface can be effectively prevented from icing and the comfort and reliability of the air conditioning system can be improved. In this way, the influence law of temperature controller parameter setting on each measurement parameter is summarized to avoid evaporator icing, which is very important for the matching of vehicle air conditioning system.

Key words: Air conditioner; Evaporator; Freeze; Thermostat

摘要： 文章针对某型汽车，对其所产生的蒸发器结冰现象通过道路试验进行复现，并据此研究蒸 发器结冰的控制方法。试验发现蒸发器结冰与温控器的位置及温控器的设定参数有关。在道路试 验过程中，通过改变温控器的位置及参数设置，并同时采集空调系统相关数据，选取最为合适的 温控器参数设置，可有效防止蒸发器表面结冰，提高空调系统舒适性及可靠性。通过这种方式总 结出温控器参数设置对各测量参数的影响规律，避免蒸发器结冰，对整车空调系统匹配至关重要。

关键词: 空调；蒸发器；结冰；温控器