The thermal insulation performance of a refrigeration insulation box is closely related to its structure. Therefore, precautions when purchasing Chongqing refrigerated trucks.

1. It is necessary to check whether the thermal conductivity of the insulation material itself and the filling material is dense. At present, the insulation material is foamed PU.

2. It is necessary to check whether the internal insulation layer of the box board is sealed. The box board used in refrigerated carriages is filled with foam as a whole, and the internal insulation layer of the entire box board is connected as a whole. However, the sandwich bonding method used by other refrigerated truck manufacturers is far from achieving the integration of insulation materials inside the box.

3. Check if there is a metal thermal bridge, 4. Check if the board connection is tight and seamless, and 5. Check the sealing performance of the watch's door and mouth. Good thermal insulation performance refers to the long insulation time and short working time of the refrigerator when reaching the same internal temperature, while also reducing fuel consumption and playing a role in energy conservation and emission reduction.

On the contrary, the weight of a car and the fuel consumption during transportation are lighter, resulting in less fuel consumption during transportation. The insulation layer of the cold chain refrigeration and thermal insulation vehicle body is made of foamed polyurethane, and the inner and outer surfaces of the vehicle body are made of fiberglass plates. The edges of the vehicle body are also made of lightweight aluminum materials.

A good refrigeration insulation compartment should have its inner and outer skin made of fiberglass sheet. Some refrigerated trucks use color coated steel plates for their inner and outer skins. Experiments have shown that the corrosion resistance of fiberglass is 3-5 times that of ordinary metal materials, and it is easy to maintain. Therefore, the service life of refrigeration and insulation boxes will be greatly extended. A good insulation box has a long service life. The insulation board itself, however, if the structure of the truck body is unreasonable, such as the sandwich adhesive bonding, it takes a long time, the adhesive bonding time is too long, the interlayer is aging, the body interlayer is easy to fall off inside and outside the body, the insulation effect is poor, and it is also easy to breed microorganisms, reducing the quality of food security. At the same time, the suction foam insulation layer will also reduce the body insulation performance.