The transport refrigeration unit is the food guard in our life. The fruits and vegetables pulled by the transport refrigeration unit are fresher than those used or pulled. Of course, the price sold is higher than the price of food sold by other vehicles. Good temperature is especially important for refrigerated goods. If the temperature of the refrigeration unit in the road is less than the temperature difference between the goods, it may deteriorate the goods.
When transporting the refrigeration unit, it is necessary to pre-cool or pre-heat the car. Because the vehicle is parked in the open air, the cabin temperature is usually the ambient temperature. If the temperature of the goods being transported is not the ambient temperature, the car will be loaded with the car, and the ambient temperature will affect the temperature of the goods being transported, resulting in a change in the quality of the goods being transported.