The weather is getting colder and winter will come soon. The mixer driver works hard and the weather is cold. How can we find less air conditioning companies? Here are the components of the air conditioning system of the concrete mixer and the places to be maintained.

　　制冷系统

　　refrigeration system

　　制冷剂:通过管路的液镜观察有无泡沫现象。小气泡或透明无气泡表示制冷剂充足，而泡沫表示制冷剂不足，需要补充。

　　Refrigerant: observe whether there is a bubble phenomenon through the liquid lens of the pipeline. Small bubbles or transparent air bubbles indicate sufficient refrigerants, while foam means insufficient refrigerants.

　　管路:随时检查接头是否有泄漏。关节周围没有油是正常的。如果有石油，就意味着有泄漏。管道表面损坏时，应加保护层。维修管道应防潮、防尘。拆卸部件和管道时，应及时密封管道头或管道，防止灰尘和湿气进入。

　　Pipeline: check the connector for leakage at any time. It is normal that there is no oil around the joints. If there is oil, it means there is a leak. When the pipeline surface is damaged, the protective layer shall be added. The maintenance pipeline shall be moisture-proof and dust-proof. When disassembling components and pipes, the pipe head or pipes shall be sealed in time to prevent dust and moisture from entering.

　　当空调制冷效果不佳时，应检查暖风水阀是否关闭。如检查暖风两根黑色软管热手，应在使用空调后关闭暖风水阀。

　　When the cooling effect of air conditioner is poor, check whether the heating water valve is closed. If checking the hot hands of the two black hoses of the warm air, close the warm air water valve after using the air conditioner.

　　(2)压缩机

　　(2) Compressor

　　定期检查驱动皮带是否太松，张紧轮内轴承是否运转正常。

　　Regularly check whether the drive belt is too loose and whether the bearing in the tensioning wheel operates normally.

　　检查皮带应在发动机停止后进行。用两根手指压下7 ~ 10MM，放在两个轮子中间。更好有一点弹性。如果皮带磨损严重，就应该更换。

　　Check the belt after the engine stops. Press down 7 ~ 10 mm with two fingers and put it in the middle of two wheels. It's better to have a little flexibility. If the belt is badly worn, it should be replaced.

　　(3)冷凝器

　　(3) Condenser

　　冷凝器芯:表面上不要有异物阻碍热交换，当表面上有异物时要轻轻冲洗掉表面灰尘，注意不要用高压水或煤气清洗。

　　Condenser core: there shall be no foreign matters on the surface to hinder heat exchange. When there are foreign matters on the surface, the dust on the surface shall be washed gently, and the high-pressure water or gas shall not be used for cleaning.

　　风机电机:检查转动是否正常，风量是否减少。

　　Fan motor: check whether the rotation is normal and whether the air volume is reduced.

　　(4)蒸发器

　　(4) Evaporator

　　蒸发器周围环境:保持驾驶室清洁，不要堆放过多杂物，以免妨碍空气流通。

　　Surrounding environment of evaporator: keep the cab clean and do not pile up too many sundries to prevent air circulation.

　　蒸发器核心:表面是否有污物及过滤器，表面是否有灰尘或杂物。

　　Evaporator core: whether there is dirt and filter on the surface, and whether there is dust or debris on the surface.

　　风扇电机:检查正常转动。

　　Fan motor: check normal rotation.

　　(5)线束

　　(5) Harness

　　检查线夹插头是否松动，检查是否与车身有任何摩擦，这种现象应加以固定并加绝缘保护。

　　Check whether the clamp plug is loose and whether there is any friction with the body, which should be fixed and insulated.