How to choose a refrigerated truck? What is the difference between a refrigerated truck and a general van?
What are the special features of refrigerated trucks compared to ordinary trucks? Today, Xuzong Chu Sheng gave everyone a simple introduction.
In terms of structure, refrigerated trucks can usually be divided into three parts: automotive chassis, insulation cabin and refrigeration unit.
The chassis of the vehicle must be driven on the highway. The chassis of the vehicle is a natural part. In general, refrigerated trucks mainly have two forms of bicycles and trailers, mainly depending on the tonnage and demand choices of the goods to be loaded.
Generally, there are fewer goods loaded in short-distance distribution in urban areas or between counties and counties. There are more medium- and light-duty trucks, and the general transportation volume for long-distance transportation is also relatively large. The medium and heavy trucks are used, or refrigerated trucks in the form of semi-trailers are used. .
What should you watch out for when choosing a car chassis?
When selecting the automobile chassis, the user must consider the chassis's structure and carrying capacity, fuel economy, and emission standards according to the tonnage and road conditions of the cargo. Compared with the choice of ordinary truck chassis, refrigerated trucks also need to focus on the stability of the chassis, refrigerated trucks transport goods are usually not long-term preservation of the goods, although there is refrigeration equipment, still need to reach the destination faster. At the same time, refrigerated goods have higher requirements for the transport environment. If there is a failure on the road, the goods will deteriorate and the loss will be very high.
â— Choice of refrigerator compartment
The body of a refrigerated truck is different from an ordinary van, and it needs good sealing performance and heat insulation effect, so as to ensure that the refrigerated cargo is in a stable temperature environment.
The design of refrigerated compartments is mainly airtight and heat-preserving. Generally, the structure of refrigerated trucks adopts a three-layer structure. The inner and outer skins are made of composite materials, such as glass steel plates, color steel plates, and aluminum alloys. The inner plate material should be made of different materials for transporting different goods. The most expensive inner material plate should be a stainless steel plate. The middle sandwich is a heat-insulating material, and polyurethane foam is mainly used. On the four sides, the glass plate and the polyurethane foam are bonded together with a high-strength adhesive to form a closed plate.
Thickness of refrigerated compartment
In addition to materials, the thickness of the cargo compartment also determines the effectiveness of the insulation. The thicker the insulation layer of the cargo compartment, the better the insulation effect. However, the space inside the cargo compartment will be reduced, and the load of the cargo will be reduced. Users need to follow their own actual conditions. Need to choose the appropriate thickness.
Special requirements for refrigerated compartments In addition, different goods have different requirements for the car body. Users can customize the car body according to specific needs.
Ordinary cargo can not be changed into a refrigerated truck?
Many people asked whether ordinary vans could be converted into refrigerated trucks. They asked the technical staff of the factory. They informed that the conversion is of course possible. Adding insulation materials in the middle and adding cooling units .
However, they believe that it is more cost-effective to convert directly into a refrigerated compartment because the general cargo compartment is made of iron or steel, and the heat insulation effect is not very good. At the same time, it is also prone to rust. For example, seafood products are pulled because the seawater is corrosive. In the selection, it is necessary to pay attention to the anti-corrosion of the car body material.
â— Refrigeration unit
Among the three components of refrigerated trucks, the refrigeration unit is the most important part. Because of the small space in the cargo space, the technical requirements for controlling the temperature are also higher. The principle of the refrigeration unit Let us first look at the principle of the refrigeration unit. At present, the refrigeration unit of the refrigerated truck adopts more mechanical refrigeration. The principle is basically the same as the refrigeration equipment such as the air-conditioner refrigerator. It absorbs heat at one point and then at another point. Dissipates heat. This is achieved by circulating the refrigerant between two points. The refrigerant absorbs heat through a coil (evaporator) in the cargo space and then dissipates heat through another coil (condenser) on the outside. The refrigerant is circulated in the system through a compressor, which is driven by a gasoline engine, a diesel engine, or a motor.
The classification of refrigeration units can be divided into two types, independent and non-independent units, from the power source of the refrigeration units. The independent units have separate power sources. The diesel engine of the unit itself is used as its power source; the power output of the non-independent units is Rely on the engine of the car chassis to drive.
From the power output can be seen their differences, when the car engine is stopped when the non-self-contained refrigeration unit loses power support, the refrigeration system stops working, if the car is off or in the car when the engine fails, the refrigerator will stop Refrigeration, the quality of goods in the carriage is also not guaranteed. The non-freezing refrigeration unit system is simple in structure, easy to maintain and maintain, and the price is relatively low. The stand-alone refrigeration unit is somewhat more complicated because of more maintenance and repair of the engine system.
In terms of the use of transportation, if it is used as a short-distance distribution within a city or between districts and counties, the use of non-independent units is recommended. Not only is the procurement cost lower, even if a failure occurs, it is relatively easy to find a maintenance point; For transportation, a stand-alone refrigerator is recommended because even if the car engine stops working during long-distance transportation, the refrigerator can still be normally cooled to meet the safety of the transported items.
In addition, from the model to be equipped, non-independent units are recommended for cars with a height of 7 meters and less than 7 meters. Independent cars with more than 7 meters are better.
From the standpoint of cost, the difference between the price of non-independent chiller units and independent chiller units is more than tens of thousands. If the budget is relatively abundant, and the temperature requirement in the vehicle compartment is relatively low (the required temperature is at least minus 10 degrees below), it is still recommended. It's better to use a standalone style.
Imported or domestic?
Because refrigerated items are sensitive to changes in ambient temperature, relatively large temperature fluctuations can lead to spoilage. If the refrigerating unit's refrigeration unit has problems with cooling or if it stops working, then for the owner, the loss is not only freight but also a large amount of money. Especially for long-distance transport users, their performance requirements for refrigeration units are high.
However, there are still some gaps between domestic refrigeration units and foreign brands in terms of temperature control. In order to achieve very good cooling effect, many users still choose foreign brands.
Say good goods are not cheap, the price of imported refrigerators is also very expensive, like the kind of semi-hanging refrigerated truck imported refrigerators, the new cheapest is also more than 100,000. In contrast, domestic brands have obvious advantages in terms of price. For users who pay attention to prices, domestic brands are also a good choice. The new imported machines are too expensive, domestic refrigeration effects cannot be guaranteed, some users will choose second-hand imported refrigerators, and the results are good.
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