1、混凝土搅拌罐车风口向上控制温差
1. Control the temperature difference upward at the air outlet of concrete mixing tank truck
混凝土搅拌罐车空调温度不要调得太低，风速不要太校自动恒温空调一般车厢内外温差不要超过10℃。非恒温式空调，可先把冷气温度设在风速开到，等觉得冷时再把温度调高一点，把风速降一挡，如还冷，再将温度调高些，然后将风速降下来，反复这样才是正确操作。当混凝土搅拌罐车外温度达到30℃以上时，应把混凝土搅拌罐车内温度控制到25℃左右。
The air conditioning temperature of concrete mixing tank truck shall not be adjusted too low, the wind speed shall not be too calibrated, and the temperature difference inside and outside the car shall not exceed 10 ℃. For non constant temperature air conditioning, set the temperature of the cold air at the wind speed first, and then increase the temperature when it feels cold, and reduce the wind speed by one gear. If it is still cold, increase the temperature, and then reduce the wind speed. Repeat this is the correct operation. When the temperature outside the concrete mixing tank truck reaches more than 30 ℃, the temperature inside the concrete mixing tank truck shall be controlled to about 25 ℃.
2、混凝土搅拌罐车到目的地先关空调
2. Turn off the air conditioner when the concrete mixing tank truck arrives at the destination
混凝土搅拌罐车在到达目的地前三五分钟关掉空调，不仅可以降低油耗，更能避免空调产生异味。在混凝土搅拌罐车停车前几分钟关掉空调，同时适当加大风量，在混凝土搅拌罐车停车前使空调管道内的温度回升，**可以减少冷凝水的产生而保持混凝土搅拌罐车空调系统的相对干燥，霉菌自然也没有了生存的空间。
Turning off the air conditioner three or five minutes before the concrete mixing tank truck arrives at the destination can not only reduce the fuel consumption, but also avoid the peculiar smell of the air conditioner. Turn off the air conditioner a few minutes before the concrete mixing tank truck stops, and increase the air volume appropriately. Before the concrete mixing tank truck stops, make the temperature in the air conditioning pipe rise again, * * it can reduce the generation of condensate and keep the air conditioning system of the concrete mixing tank truck relatively dry, and the mold naturally has no living space.

你说的是汽车车内降温剂吧？降温剂实际上是干冰，瞬间蒸发后**是CO2，只要不是大量使用（CO2浓度太高对人体还是有害的），可以起到降温作用。
Are you talking about car cooling agent? The cooling agent is actually dry ice. After instant evaporation * * is CO2. As long as it is not used in large quantities (CO2 concentration is too high or harmful to human body), it can play a cooling role.
3、先开混凝土搅拌罐车空调外循环
3. Start the external circulation of the air conditioner of the concrete mixing tank truck first
天热了，烈日下混凝土搅拌罐车内温度可能高达摄氏六七十度，这时上混凝土搅拌罐车前应先把车门、车窗打开，释放积聚在车内的热气，且不要急于关上车窗，先打开混凝土搅拌罐车空调外循环，待车厢内外温度相近时，关闭车窗，启用内循环。待混凝土搅拌罐车内温度达到正常舒适状态时，立即关闭风门，达到快速降温效果。
It's hot, and the temperature in the concrete mixing tank truck may be as high as 60 or 70 degrees Celsius in the hot sun. At this time, before getting on the concrete mixing tank truck, open the door and window to release the heat accumulated in the car. Don't be in a hurry to close the window. First open the external circulation of the air conditioner of the concrete mixing tank truck. When the temperature inside and outside the car is similar, close the window and start the internal circulation. When the temperature in the concrete mixing tank truck reaches the normal and comfortable state, close the air door immediately to achieve the effect of rapid cooling.
祢所说的“汽车降温剂”那是指冷却发动机温度的，叫做“防冻液”是专门对发动机温度进行冷却的，对于汽车内部或者房子的室内没用作用的。
The "automobile cooling agent" you mentioned refers to the one that cools the engine temperature. It is called "antifreeze", which is specially used to cool the engine temperature and has no effect on the interior of the car or the interior of the house.
4、混凝土搅拌罐车堵车时打开车窗
4. Open the window when the concrete mixing tank truck is in a traffic jam
长时间使用空调会使混凝土搅拌罐车冷凝器压力过大，这不仅会对混凝土搅拌罐车制冷系统造成损耗，而且也会降低混凝土搅拌罐车空调的制冷效果。所以，在混凝土搅拌罐车内温度已经让您热气顿消的时候，不妨将空调关闭一会儿。
Using the air conditioner for a long time will cause excessive pressure in the condenser of the concrete mixing tank truck, which will not only cause loss to the refrigeration system of the concrete mixing tank truck, but also reduce the refrigeration effect of the air conditioner of the concrete mixing tank truck. Therefore, when the temperature in the concrete mixing tank truck has made your hot air disappear, you might as well turn off the air conditioner for a while.