Attention to the maintenance of the woman's brilliance, the same as the refrigerated truck, in our normal use, the maintenance and maintenance of the vehicle and the refrigerator are inseparable. Only proper maintenance and maintenance of the equipment on time can ensure the normal use of the equipment and extend the service life of the equipment. Usually the chassis engine is maintained and maintained according to the driving range, and the refrigeration unit is maintained and maintained according to the engine working hours.
The normal refrigeration unit is maintenance and maintenance for 500~700 hours. It needs to replace the oil filter element, fuel filter element and air filter element. Also pay attention to check the tightness of the belt and the leakage of the refrigeration system. However, the current refrigeration units of individual brands (such as In order to meet the needs of environmental protection, we minimize the damage to the environment and reduce the emission of harmful substances. Therefore, synthetic engine oil or semi-synthetic motor oil is used instead of ordinary engine oil, thus prolonging the maintenance time of the engine, usually once in 2000 hours. maintenance. This reduces the emissions of used motor oil. In addition, scientific experiments have shown that by using this high-end engine oil, not only the wear on the engine is reduced, but also the fuel consumption of the engine can be reduced. Therefore, scientific maintenance and maintenance can not only ensure the integrity of the equipment, but also reduce operating costs.
The choice of refrigerating truck refrigeration unit is generally based on the volume of the refrigerated compartment and the temperature requirements of the transported cargo to select the refrigeration unit with different power cooling capacity.
Proper operation ensures that the goods are stored and transported in good condition. Only the correct use and operation of the refrigerated truck can ensure the good delivery and preservation of the goods. Because refrigerated trucks are designed for use in temperature-sensitive products, temperature assurance is the key to refrigerated trucks. If used or mishandled, the goods will not be stored or shipped in good condition.
Preventive maintenance of refrigerated trucks can reduce maintenance and operating costs to the most appropriate packaging for the protection of the goods.
Refrigerated car for non-ventilated boxes for frozen goods, and ventilated boxes for side walls for fresh goods. The box must be pressure resistant. Since the frozen cargo is not allowed to blow from the surface, the wind blows over the surface of the frozen cargo, which will cause moisture loss in the cargo, resulting in a decline in the quality of the cargo. This year, our country's development of bulk frozen food is not allowed to sell, it must be packaged sales is the reason. Due to its own characteristics, fresh products are still in a state of breathing during storage and transportation. If they are not well ventilated, the goods will deteriorate. It is therefore necessary to ensure that such goods are well ventilated and ventilated.
The refrigerated truck sets the thermostat at the required temperature, pre-cools the car for 1.5 hours to remove the heat remaining in the car; when the cargo is loaded, the refrigeration unit is shut down and loaded quickly.
When refrigerating trucks are loaded, they must first be pre-cooled or preheated. Because the vehicle is parked in the open air, the cabin temperature is usually the ambient temperature. If the temperature of the goods being transported is not the ambient temperature, the goods are loaded into the compartment, and the ambient temperature will affect the temperature at which the goods are transported, resulting in a change in the quality of the transported goods. Therefore, the car must be pre-cooled to the required temperature before loading. However, the refrigeration unit must be shut down at the time of loading (same as unloading). Many people do not turn off the refrigeration unit when loading and unloading goods. In fact, this is a very wrong operation.
When we pre-cool the car, if it is not turned off, when the car door is opened, since the fan of the evaporator of the refrigerating unit is working, the front of the fan is positive pressure, and the back side is negative pressure, so the cold air is blown out from the upper part of the car. The lower part will quickly suck in the hot air outside, which will cause the temperature inside the compartment to rise rapidly. If the cargo is loaded and unloaded after shutdown, the air flow stops because the fan is stopped, and the wind pressure inside and outside the compartment is consistent, thus allowing the external hot air to pass into the air. The speed inside the cabin is relatively slow.
The cargo must be pre-cooled to the required temperature and the temperature of the cargo checked during loading; the refrigeration unit is used to maintain the temperature of the cargo, not to reduce the temperature of the cargo.
Many users of refrigerated trucks have a misconception that the freezer on the refrigerated truck is free to freeze or heat the cargo loaded into the compartment to the temperature it requires. Therefore, the cargo that is less than the transport temperature requirement is loaded into the passenger compartment, and then the refrigeration unit is set to the required transport temperature, and the temperature of the cargo is lowered or raised to the required temperature for a certain period of time. However, the opposite is true. The goods can not only drop the temperature (or not rise), but cause the goods to be damaged or deteriorated. Because the refrigeration unit of a refrigerated truck does not lower the temperature of the cargo, but maintains the temperature of the cargo, he wraps the cargo like the quilt that we used to sell cold drinks. When the cold (hot) source of the outside is radiated, conducted, and convected into the body, the cold air blown out by the refrigeration unit is taken away, and the heat source is prevented from entering the cargo.
When loading, you must first measure the temperature of the loaded goods. If the set point temperature of the refrigeration unit is higher or lower than the cargo temperature, the temperature of the cargo in the cabin is difficult to reach the temperature required for transportation. The storage temperature of the goods must be consistent with the transportation temperature. If the temperature of the goods changes frequently, the water will be lost, which will lead to changes in the quality of the goods, resulting in a shortened shelf life of the goods.
Even if the unit capacity exceeds the actual demand, insufficient air circulation can be the main cause of deterioration of the item; any blockage around the cargo may result in a “hot spotâ€.
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Refrigerated car Su Qingwen
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