Refrigerated car introduction

The refrigerated truck is composed of the walking part of the chassis of the special purpose vehicle, and the thermal insulation compartment (usually composed of polyurethane material, glass fiber reinforced plastic, color steel plate, stainless steel, etc.), refrigeration unit, and temperature recorder in the compartment. For vehicles with special requirements, Such as meat hook car, can be installed meat hook, waist, aluminum alloy rails, ventilation slots and other optional parts.

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.

4, vacuum adsorption paste

Refrigerator unit classification:

The refrigeration unit is divided into non-independent refrigeration units and independent refrigeration units. Domestic units and imported units. General models use external coolers, and a few mini-refrigerators use built-in coolers. For refrigerators with lower temperature requirements, a built-in cold plate (functionally equivalent to an evaporator) can be used.

classification

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

Classified by chassis load capacity: micro-refrigerators, mini-refrigerators, medium-sized refrigerated trucks, large-scale refrigerated trucks

Classified by car type: Bread-type refrigerated trucks, Van-type refrigerated trucks, Semitrailer refrigerated trucks [1]

The first stage

Integral injection of foamed metal skin structure. First-generation refrigerated truck manufacturers use this process. This product has a lot of gold on the body The existence of the material is easy to form a large number of cold bridges; on the other hand, the defects injected into the foam insulation are not easy to find, the inherent quality is not easy to guarantee; moreover, because the foaming material is used as both an insulation material and a binder, it is easy to produce Insufficient bonding and other defects, the insulation effect is not ideal, the heat leakage rate (leading to the second stage thermal coefficient) 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, light weight, reduced heat leakage rate (thermal conductivity), good heat preservation 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 and leaks heat

(The thermal conductivity) is low and the insulation effect is good. 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 the representative refrigerated truck manufacturers in China.

Hermetically sealed reefer truck containers need to be tightly sealed to reduce heat exchange with the outside world, in order to maintain a low temperature inside the refrigerator. Refrigerated retrofitted refrigeration equipment communicates with the container and provides continuous cooling to ensure that the temperature of the container is within the allowable range of the cargo.

The goods transported by portable refrigerated trucks are usually items that cannot be stored for a long period of time. Even though there are refrigeration equipment, they need to be delivered to destinations faster.

Containers of insulated refrigerated trucks are similar to containers, but are made of materials with better heat insulation effect, reducing heat exchange.

1. Refrigeration vehicle refrigeration unit

Refrigerated vehicle refrigeration unit: Provides an endless stream of "cold" important equipment for refrigerated trucks. It is generally installed at the top of the front of the container and has the appearance of an air conditioner, but it has stronger cooling capacity than the same volume of air conditioners.

Refrigeration units are generally divided into two types: stand-alone units and non-independent units. The difference is that the independent units generate power for maintenance by completely using another unit. The non-independent units are fully powered by the engine's engine work to drive the group. Refrigeration work.

The choice of refrigerating vehicle refrigeration unit

Generally, the refrigeration units with different power refrigeration capacities are selected according to the volume of the refrigerator body and the requirements for the temperature of the transported cargo.

2 refrigerated car insulation body

The refrigeration unit of a refrigerated truck is used for temperature control, and the role of the car body is to maintain the temperature. If the refrigeration unit is the provider of energy, then the car body is the reservoir of energy. Among the three components of refrigerated trucks, the refrigeration unit and the insulated car body are the most important. The removal of the chassis can be used as a small thermal insulation and cold storage. [2]

Choice of insulation box

The choice of car body generally follows several points: good insulation performance, light weight, and not easy to damage