According to the different usage of refrigerated trucks, transporting seafood, fruits and vegetables, fresh milk is called warm-up trucks, transporting ice cream, ice cream and other frozen foods is called frozen trucks, which are equipped with special meat connection equipment such as hooks. A general refrigerated truck has three parts: the car chassis, the insulating box, and the refrigeration unit, so the manufacturer of the refrigerated truck is selected according to the nature of the goods it transports.
In order to buy a car chassis, we must consider what kind of chassis, what kind of chassis is open and comfortable, what kind of chassis runs long-distance fuel saving, what kind of chassis horsepower, what kind of after-sales service convenience and other factors.
Classification according to chassis manufacturer: Dongfeng refrigerated card, Changan refrigerated card, Qingling refrigerated card, Jiangling refrigerated card, Jianghuai refrigerated card, Foton refrigerated card.
According to the chassis capacity classification: mini refrigerated truck, small refrigerated truck, medium refrigerated truck, large refrigerated truck.
Classified by models: bread-type refrigerated trucks, car-type refrigerated trucks, semi-trailer-type refrigerated trucks.
In addition, we can consider the structure and carrying capacity of the chassis, fuel saving, emission standards, etc. according to the tonnage and conditions of the cargo.
Compared with the choice of ordinary truck chassis, the price of refrigerated trucks also needs to pay attention to the stability of the chassis. The goods transported by refrigerated trucks are usually not long-term storage items. Although there are refrigeration equipment, they still need to be faster to reach the destination. At the same time, the requirements for the transportation environment of refrigerated goods are also high. If the road fails, the goods will deteriorate and the loss will be great.
The second choice is to purchase insulating boxes, color steel plates, glass fiber reinforced plastics, aluminum alloys and other materials. The price varies. The thickness of the box is 5 cm and 8 cm, which can be customized according to customer requirements.
The body of the refrigerated truck is different from the ordinary body, which needs good sealing performance and heat insulation effect to ensure that the refrigerated products are in a stable temperature environment.
The design of refrigerated trucks is mainly air tightness and thermal insulation, and the structure of refrigerated trucks is generally a three-layer structure. The inner plate material should be different commodities and take different materials, the most expensive inner plate should be stainless steel plate. The interlayer is an insulating material, mainly polyurethane foam. High-strength glue is used on all sides to bond the glass steel plate and polyurethane foam together to form a closed panel.
In addition to the material, the thickness of the cargo hold also determines the quality of the thermal insulation effect. The thicker the thermal insulation layer of the cargo hold, the better the thermal insulation effect, but the internal space will be reduced and the cargo load will be reduced. Users need to choose an appropriate thickness according to actual needs.
Three refrigeration units, domestically produced Shanghai Songleng, Xiangfan hanya, imported units include South Korea k, Italian refrigeration, American refrigeration units and other refrigeration units, different brands can achieve the same effect, and the price is also different, according to the nature of cargo transportation Choose refrigeration units very important.
The refrigeration unit is the most important part of the refrigerated truck. Due to the small cargo space, the technical requirements for temperature control are also high.
Market share of high-imported brands such as American Carrier, Great Cold King, Japan's Mitsubishi, South Korea's Maple, and Han Xue
The price of imported coolers is also very expensive, such as one of the imported coolers installed on semi-trailers, the newest and most convenient, more than 100,000 units. Compared with domestic brands, the price advantage is very obvious. For price-oriented users, domestic brands are a good choice.
The power source of the refrigeration unit can be divided into independent and non-independent units. The independent unit has an independent power source, the unit itself has an independent diesel engine as the power source, and the power output of the non-independent unit is driven by the engine of the chassis.
The cost condition and price difference between the non-independent refrigeration unit and the independent refrigeration unit are more than tens of thousands of times. If the budget is relatively rich, and the temperature requirements of the car are low (at least below minus 10 degrees), it is recommended to be better.
Repair and maintenance of refrigerated trucks
A qualified refrigerated truck must ensure that the six sides of the vehicle are well ventilated and the goods on the six sides are not obstructed; good air circulation ensures that the goods are transported under appropriate temperature requirements. The cold (hot) gas from the refrigeration unit protects the cargo by isolating the cold (hot) source from the cargo entering the transport. If a location is blocked, part of the source of cold and heat will go directly into the item, causing the temperature of the cargo to change. Make sure the air back cover is in good condition; does not block the evaporator inlet (wind); insufficient return air will cause irregular circulation of cold air, causing top cargo to freeze.
When using a refrigerated truck, keep the interior clean. Due to the effect of the evaporator fan, air can circulate in the car, causing the floor to crack or dirt to be sucked in by the evaporator fan. The long-term effect will cause a large amount of impurities to enter the evaporator coil, thereby affecting the cooling effect of the refrigeration unit. Since the coil is surrounded by impurities, the heat exchange rate of the coil is reduced. So after a few years of use, people will feel that the cooling effect is not as good as the beginning, except for their own failure, because the coil is too dirty. Therefore, keeping the car floor clean is the key to ensuring the normal operation of the refrigeration unit.
Many refrigerated truck users believe that the refrigeration unit on the refrigerated truck is free to freeze or heat the cargo inside the vehicle to the temperature they need. Therefore, goods below the transport temperature must be loaded into transport, and then the refrigeration unit is set at its specified transport temperature, and the temperature of the cargo is lowered or lowered to the specified temperature within a certain period of time. But the truth is that not only will the cargo not fall (or lift), but it will be damaged or deteriorated. Because the refrigeration unit of the refrigerated truck does not lower the temperature of the goods, but maintains the temperature of the goods, he packs the goods like the quilts we sell cold drinks. When the external cooling (HOT) source enters the human body through radiation, conduction and convection, the refrigeration device blows the air out and takes it away, and the insulating source enters the cargo.
The insulating box is made of thick color steel plate/aluminum alloy, the inner and outer color steel plate is made of color steel plate, and the aluminum alloy is made of color steel plate/aluminum-plastic plate. According to the different needs of users, such as decorative aluminum alloy stainless steel, price negotiation, the thickness of the insulator is divided into 5mm and 8mm, which can be customized according to the needs of users.
The box body is composed of all-plastic and fully-enclosed composite boards. The inner and outer layers are made of polyurethane foam insulation material. The middle layer is made of polyurethane foam insulation material. Glued together, the inner height is adopted.