Glossary - Refrigerator

Refrigerated trucks (Refrigerator truck)

Model Description:

The refrigerated truck is also known as a vaccine transport vehicle. It is a refrigerated transport vehicle equipped with a refrigerating device and an insulated cabin. It is commonly used for the transportation of frozen foods, dairy products, fruits and vegetables, and vaccines.

structure:

The refrigerated truck is composed of a special vehicle chassis, an insulation cabin, a refrigeration unit, and a temperature recorder in the compartment.

Refrigerated car body production technology:

1. The “sandwich” plate bonding type of split sheets is assembled. At present, larger refrigerated truck manufacturers in China have adopted this technology. Refrigerator vehicles produced using this technology have higher heat insulation performance.

2. Fragmented injection foam type.

3, the overall skeleton injection foam type.

Refrigerator unit classification:

Non-independent refrigeration units, independent refrigeration units.

classification

Classified by chassis manufacturer: Dongfeng Refrigerated Truck, Changan Star Refrigerated Truck, Qingling Refrigerated Truck, Jiangling Refrigerated Truck

Classified by chassis carrying capacity: small refrigerators, medium refrigerated trucks, large-scale refrigerated trucks

According to the type of compartments: bread-type refrigerators, van-type refrigerators

development stage

The first stage

Integral injection of foamed metal skin structure. First-generation refrigerated truck manufacturers use this process. Due to the presence of a large amount of metallic materials on the car body, this product is easy to form a large number of cold bridges; on the other hand, the defects injected into the foam heat insulation layer are not easy to find, and the internal quality is not easy to guarantee; moreover, since the foam material is used for heat preservation The material is also used as a binder, which is prone to defects such as poor adhesion, and the heat insulation effect is not ideal, and the heat leakage rate (the thermal coefficient in the second stage) is high.

second stage

Integral injection of foamed glass steel structure. It is used in second- and third-generation refrigerator car manufacturers. This kind of product has improved one step on the basis of the first stage product, lighter weight, lower heat loss rate (thermal conductivity), better insulation effect, but there are defects such as poor adhesion, easy-to-debride foaming on the outside of the compartment.

The third phase

Fully enclosed polyurethane plate bonded glass steel structure. It is used in second- and third-generation refrigerator car manufacturers. This product is light in weight, low in heat leakage (thermal conductivity) and good in heat preservation. The unsaturated polyester resin is used as a binder, and a cushion layer is further added. The rigid polyurethane foam for the heat-insulating material has low thermal conductivity and high strength. The plate is bonded with a high-strength, high-seal adhesive to form a unitary body. The only drawback is that the loss after the polyurethane cutting is relatively large, so the material cost is higher. Especially in the current situation of high prices of chemical raw materials, the cost of production of cars is getting higher and higher. Such a structure of refrigerated trucks dominates the domestic and foreign markets, and is also a process used by China's representative refrigerated truck manufacturers.