The Lengwang refrigeration unit is a key component of refrigerated trucks, and daily maintenance directly affects the cooling effect inside the refrigerated truck compartment. The high temperature weather in summer often exposes many problems during the use of refrigerated and insulated vehicles, which are closely related to poor vehicle maintenance. Many refrigerated trucks operate under high-intensity overload conditions for a long time and lack normal maintenance, which inevitably leads to various problems.

During the use of refrigerated trucks, the snow condition should be checked frequently through the glass eyes. If it is missing, the leakage should be promptly eliminated and replenished as soon as possible. Regularly check the condition of the belt and tighten it as needed. Regularly keep the condenser clean and pay attention to washing it when washing the car.

When refueling, connect one end of the refueling pipe to the refueling valve at the inlet of the compressor, slightly open the refueling valve, and use the pressure in the system to discharge the air inside the refueling pipe. Insert the other end into the oil drum; Properly close the refrigerant supply valve of the system and adjust the suction low pressure alarm setting to avoid stopping due to low pressure; When the suction pressure is lower than atmospheric pressure, open the refueling valve and the oil will automatically enter the compressor. When supplementing refrigerant, connect one end of the fluorine adding tube to the fluorine adding port of the system and the other end to the fluorine bottle, and drive out the air inside the tube through the fluorine adding hose; First, open the valve of the fluorine bottle to confirm that there is no leakage, and then open the valve at the fluorine filling port; The R23 system should have the bottle mouth facing upwards, while the R404A system should have the bottle mouth facing downwards to ensure rapid fluorine addition; After adding fluorine, close the valve of the fluorine bottle first, and then close the valve of the fluorine inlet.

Cleaning refrigerated trucks is very important. Cleaning refrigerated carriages has two functions: one is to maintain the cleanliness of the interior environment and prevent strange odors from appearing inside the carriage. In addition, to prevent impurities from being sucked into the evaporator coil by the evaporator fan of the refrigeration unit, thereby reducing the cooling effect of the refrigeration unit, this is also one of the reasons why refrigerated trucks may feel that the cooling effect is not as good as before after using them for several years.

It is generally recommended to unload the goods from the refrigerated truck before cleaning, as this makes it easier to clean, saving time and effort; The remaining stains are more difficult to clean later on. The refrigerated truck body is generally clean and shiny, and the tools used to clean the refrigerated truck should not cause scratches or other damage to the body. Therefore, soft materials and non corrosive cleaning agents are the choice. These substances can be cleaned off at any time when needed in the car. The finishing work after cleaning is also very important. Water accumulation and footprints should not be left on the refrigerated truck, especially in the interlayer of the refrigerated truck, to avoid deformation or corrosion of the box. After the cleaning work is completed, the carriage should be opened, dried, and then the door should be closed.

The engine is the soul of a refrigerated truck. When driving a refrigerated truck, pay attention to whether there is any abnormal sound or vibration from the engine, and check it in a timely manner if necessary. Try to avoid emergency acceleration or deceleration while driving in order to minimize the load on the car's engine transmission system. After driving 1000km, the new car should be sent for maintenance to avoid many potential problems in a timely manner.

The maintenance of the paint surface of refrigerated trucks is also crucial, and they should be cleaned in a timely manner. Neutral and mild cleaning agents should be selected to remove the dust layer, sand particles, and other dirt adhered to the body. For dirt that cannot be seen by the naked eye, such as paint glue, professional cleaning agents should be used to clean it. The box of the refrigerated truck should not be taken lightly. The compartment of the refrigerated truck is composed of polyurethane foam and fiberglass inside and outside, with good sealing effect. When using a refrigerated truck, try to avoid hard objects hitting the compartment to prevent a decrease in sealing effect.