Logistics Refrigerated Truck

Parameter list

logistics refrigerated truck's usage scenario

 

logistics refrigerated truck is used to transport frozen or fresh-keeping goods closed van transport truck, is equipped with refrigeration unit refrigeration device and polyurethane insulation car refrigerated special transport vehicle, often used to transport frozen food (refrigerator truck), Dairy products (milk transporter), vegetables and fruits (fresh cargo transporter), vaccines and drugs (vaccine transporter), etc.

Logistics refrigerated truck cargobox produce craft

 

According to the selection of different equipment and functions in the body, logistics refrigerated truck can meet the transportation of various vaccines and drugs. The body is manufactured by hydraulic adsorption integrated molding production line, the insulation performance reaches the national A-level standard, and the completely closed polyurethane plate bonding method; The internal and external walls are made of domestic high quality 2.2mm glass steel (non-light absorption, good heat insulation, strong hardness, oxidation resistance); The middle insulation layer is XPS extruded polystyrene board or PUR polyurethane board; Accessories: Aluminum alloy around the body, stainless steel corner, stainless steel door lock, stainless steel door frame and hinge, energy-saving LED light in the body; The standard thickness of the body is 80mm, and the thickness of 60mm and 100mm can be selected. The inner and outer wall panels can be equipped with FRP, stainless steel, color steel plate and aluminum alloy.

Structure of logistics refrigerated truck

logistics refrigerated truck by the special car chassis walking part, and thermal insulation body (generally composed of polyurethane material, glass steel, color steel plate, stainless steel, etc.), refrigeration unit, refrigerated truck temperature recorder and other components, for special requirements of vehicles, such as meat hook truck, can be installed meat hook, waist, aluminum alloy guide rail, ventilation groove and other optional parts.

Technology of logistics refrigerated truck system

1. Pieced and assembled "sandwich" plate bonding type, at present, the larger domestic logistics refrigerated truck manufacturers have adopted this technology, and the refrigerated truck produced by this technology has higher thermal insulation performance.

2. Piecewise injection foam type.

3. The whole skeleton injection foam type.

4. Paste by vacuum adsorption

Refrigeration unit classification:

Refrigeration units are divided into non-independent refrigeration units and independent refrigeration units. Domestic units and imported units, etc. General models use external chillers, and a small number of miniature refrigerated vehicles use built-in chillers. For refrigerated trucks with low temperature requirements, a cold plate in the body can be adopted (the function is equivalent to the evaporator).

Classification by chassis carrying capacity: micro refrigerated truck, small refrigerated truck, medium refrigerated truck, large refrigerated truck

Classified by carriage type: bread refrigerated truck, van refrigerated truck, semi-refrigerated truck

Refrigerated truck refrigeration unit: provides a steady stream of "cold" important equipment for refrigerated truck containers, which are generally installed on the front of the top of the container, with an air-conditioned appearance, but with a stronger cooling capacity than the air conditioner of the same volume.

Refrigeration units are generally divided into two types, independent units and non-independent units, the difference is that the independent unit is completely through another unit to generate power for maintenance work, non-independent units are completely through the engine work to drive the refrigeration work of the unit.

Refrigerated truck refrigeration unit selection.

Generally, according to the volume of the refrigerated box and the temperature requirements of the transported goods, the refrigeration unit with different power refrigeration capacity is selected.

The correct operation method of The correct operation method of refrigerated truck

1.the correct operation can ensure that the goods can be preserved 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 specially used for temperature-sensitive products, the guarantee of temperature is the key to refrigerated trucks. If used or operated improperly, the goods can not be stored or transported in good condition.

2.preventive maintenance can minimize maintenance and operating costs.

In our normal use process, the maintenance and maintenance of vehicles and chillers are inseparable. Only the correct 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 mileage, and the freezer unit is maintained and maintained according to the working hours of the engine. The usual refrigeration unit is 500~700 hours for maintenance and maintenance, the need to replace the oil filter, fuel filter, air filter; And pay attention to check the tightness of the belt, refrigeration system for leakage; However, at present, individual brands of refrigeration units (such as the United States cold King) in order to meet the needs of environmental protection, minimize the damage to the environment, reduce the emission of harmful substances, so the use of synthetic oil or semi-synthetic oil to replace ordinary oil, thus extending the maintenance time of the engine, usually in accordance with 2000 hours to do a maintenance. Therefore, the emission of used oil is reduced. In addition, scientific experiments have proved that by using this high-end oil, not only reduce the wear and tear of the engine, but also reduce the fuel consumption of the engine.

Therefore, scientific maintenance and maintenance can not only ensure the integrity of the equipment, but also reduce operating costs.

3. Proper packaging is essential to protect the goods.

Use non-ventilated packing boxes for frozen goods, and use side-wall ventilated packing boxes for fresh goods. The packing case must be resistant to pressure.

Because the frozen goods are not allowed to have wind blowing from the surface, because the wind blowing over the surface of the frozen goods, it will cause the loss of water in the goods, resulting in the quality of the goods. This year, our country formulated on the bulk frozen food is not allowed to sell, must have packaging sales is this reason. And fresh goods due to its own characteristics, the product in the storage and transportation process is still in a breathing state, if not good ventilation, the goods will deteriorate and damage. Therefore, it is necessary to ensure that such goods have good ventilation and ventilation.

4.set the thermostat at the required temperature, pre-cooling the car box for 1.5 hours to remove the heat trapped in the car box; Turn off refrigerating unit during loading and load quickly.

When loading, the carriage must first be pre-cooled or preheated. Because the vehicle is parked in the open air, the temperature of the carriage is usually the external ambient temperature. If the temperature of the goods transported is not the ambient temperature, the goods are loaded into the carriage, the ambient temperature will affect the temperature of the goods transported, resulting in changes in the quality of the goods transported. Therefore, the carriage must be pre-cooled to the required temperature before loading. However, the refrigeration unit must be turned off during loading (same as unloading). Many people do not close the refrigeration unit when loading and unloading goods, in fact, this is a very wrong operation.

The reason is: when we precool the car, if we do not shut down and open the door, because the fan of the evaporator of the freezer unit is working, the front of the fan is positive pressure, and the back is negative pressure, so the cold air blows out from the upper part of the car, and the lower part will quickly suck in the hot air outside, resulting in a rapid rise in the temperature inside the car; If the goods are loaded and unloaded after the shutdown, because the fan is stopped, the air flow stops, and the wind pressure inside and outside the carriage is consistent, the speed of external hot air transfer into the carriage is relatively slowed down.

5.The goods must be pre-cooled to the required temperature, check the temperature of the goods when loading; The refrigeration unit is used to maintain the temperature of the goods, rather than to reduce the temperature of the goods.

Many users of refrigerated trucks have a wrong concept, always think that the refrigerator unit on the refrigerator truck is free to freeze or heat the goods loaded into the carriage to its required temperature. Therefore, the insufficient transport temperature requirements of the goods into the carriage, and then set the refrigeration unit to its required transport temperature, through a certain time to reduce the temperature of the goods to or to the required temperature. However, on the contrary, not only does the temperature of the goods not fall (or rise), but the goods are damaged or deteriorated. Because the refrigerated truck refrigeration unit is not to reduce the temperature of the goods, but to maintain the temperature of the goods, he is like the quilt we used to sell cold drinks, and the goods are wrapped up. When the external cold (heat) source is transferred to the body through radiation, conduction and convection, it is taken away by the cold air blown by the refrigeration unit to isolate the heat source from the goods.

Therefore, when loading, the temperature of the cargo must be measured first. If the set point temperature of the refrigeration unit is higher or lower than the temperature of the goods, the temperature of the goods in the carriage 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 often changes, the water will be lost, which will lead to the quality of the goods to change, resulting in the shortening of the shelf life of the goods.

6.Even if the unit capacity exceeds the actual need, insufficient air circulation will be the main cause of deterioration; Any blockage around the cargo can lead to - "hot spots".

A qualified refrigerated truck must ensure that the six sides of the carriage have better ventilation, and there is no obstruction on the six sides of the cargo; Good air circulation can ensure that the goods are transported at the right temperature requirements. The cold (hot) gas blown by the refrigeration unit isolates the cold (hot) source from the outside world entering the carriage from the goods, thus protecting the goods. If a block occurs at a certain location, the cold (heat) source of that part will directly enter the item, resulting in a change in the temperature of the goods. Ensure the air return screen is in good condition; Do not block the inlet of the evaporator (return air); Insufficient return air will cause irregular circulation of cold air and icing of top cargo.

7.Goods must be stacked on double-sided pallet; Fresh-keeping pallet can not be wrapped with plastic film, film will prevent circulation of circulating cold air to the goods; Do not obstruct the floor under the goods.

General refrigerated truck floor is the use of ventilated aluminum rail floor; However, there are also some refrigerated trucks that do not have aluminum rails and use flat non-slip floors. Usually used as a third-party transport enterprise or for dairy products of the enterprise transport vehicle is the use of flat non-slip floor, the purpose is suitable for the transport of a variety of products, or easy to clean the floor. However, we must pay attention to the loading, we must use double-sided pallet to load, to ensure the circulation of cold air on the ground. It is strictly prohibited to stack the goods directly on the flat floor.

8.do not stack goods before the evaporator export, otherwise it will hinder the cold air flow; A blockage above the cargo can short-circuit the cold air flow. Maintain a minimum distance of 225 mm between the top of the cargo and the roof of the vehicle.

When loading, do not pile the goods too high, be sure to ensure that the loading height is not higher than the plane height of the outlet. If the front of the air outlet is blocked by the goods or is too close to the goods, it will not only affect the storage and transportation temperature of the goods, but also affect the normal operation of the refrigeration unit.

Because the outlet is blocked by the goods, the cold air (or hot air) can not circulate normally in the carriage, so that the local temperature of the goods increases.

On the other hand, due to the defrosting design of the refrigeration unit, some use air induction defrosting. When the goods are too close to the outlet, the coil in the evaporator of the unit will quickly frost (or ice), the air sensing switch will then act, and the unit will quickly enter the defrost state; When the coil temperature rises to around 9 degrees (design temperature), defrosting ends immediately. So the unit will cycle the above operation, resulting in the phenomenon that the temperature inside the car can not drop. The only impression given to everyone is that the unit is always frequently defrosted. In fact, it is because the goods are loaded too high (much).

9.the interior of the carriage must be kept clean; The floor should not leave wrapping paper and paper scraps; Debris can block air flow or be sucked into the evaporator.

When using a refrigerated car, the inside of the car should be kept clean. Due to the role of the evaporator fan, the air will circulate in the carriage, causing the ground chips or dirty things to be inhaled by the evaporator fan. For a long time, a large number of impurities will be sucked into the evaporator coil, thus affecting the refrigeration effect of the refrigeration unit. Because the coil will be surrounded by impurities a little, resulting in a decrease in the heat exchange rate of the coil. Therefore, after the use of logistic refrigerated trucks for a few years, we will feel that the refrigeration effect is not as good as the beginning, in addition to the cause of its own failure, it is because the coil is too dirty. Therefore, ensuring the cleanliness of the floor in the carriage is the key to ensuring the normal operation of the refrigeration unit.

10.handling properly; Close the refrigerator when the door is opened; Keep the doors open as short as possible; Use bar curtains whenever possible when loading and unloading goods. Use partitions to separate dry goods (empty baskets) from perishables.

In order to ensure the temperature of the goods in the carriage, for the city distribution vehicles, it is recommended to use a bar curtain to ensure that the cold air in the carriage will not be quickly dispersed when the cargo is quickly unloaded (when the refrigeration unit is not closed).

Goods of different temperatures are strictly prohibited to be stored in the same compartment space. It should be separated by partitions. Since the refrigerator is used to maintain the temperature of the goods, rather than cooling them, mixing the goods with different temperatures will affect the temperature of the goods, resulting in the quality of the goods being affected.

The correct operation and use of logistic refrigerated trucks is the key to ensure the quality of temperature-controlled goods. It is also the place to ensure that the refrigeration equipment can work normally.

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