The goods must be stacked on the double-sided pallet; The fresh-keeping pallet can not be covered with plastic film, which will block the circulation of cold air to the goods; Do not block the floor under the goods.

Generally, the floor of refrigerator car is made of aluminum rail with ventilation; But there are also some refrigerated cars that do not have aluminum rails and use flat non slip floors. Generally, as a third-party transportation enterprise or enterprise used for dairy products, the transport vehicle adopts flat anti-skid floor, which is suitable for the transportation of a variety of products or easy to clean the ground. But when loading, we must pay attention to double-sided pallet to ensure the circulation of cold air on the ground. It is strictly forbidden to stack the goods directly on the flat floor.

Do not stack goods in front of the evaporator outlet, otherwise it will hinder the cold air flow; Obstruction above the cargo can cause a short circuit in the cold air flow. Maintain a minimum distance of 225 mm between the top of the load and the roof.

When loading, don't pile the goods too high. Make sure the loading height is not higher than the plane height of the air outlet. If the front of the air outlet is blocked or 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 air outlet is blocked by the goods, the cold air (or hot air) can not circulate in the car normally, so 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 air outlet, the coil in the evaporator of the unit will quickly frost (or ice), the air induction switch will act immediately, and the unit will quickly enter the defrosting state; When the coil temperature rises to about 9 degrees (design temperature), defrosting ends immediately. Therefore, the above operation will be repeated in the unit, resulting in the phenomenon that the temperature in the box can not drop down. The intuitive feeling is that the unit always defrosts frequently. In fact, it is because the goods are loaded too much.

Keep refrigerated vehicles clean

The interior of the carriage must be kept clean; There should be no wrapping paper and paper scraps on the ground; Debris can block air flow or be drawn in by the evaporator.

When using a refrigerator car, the interior of the car should be kept clean. Due to the function of the evaporator fan, the air will circulate in the car, causing the ground chipping or dirt to be inhaled by the evaporator fan. For a long time, a large number of impurities will be inhaled into the evaporator coil, thus affecting the refrigeration effect of the refrigeration unit. Because the coil will be a little bit surrounded by impurities, resulting in a decline in the heat exchange rate of the coil. So after a few years of using the refrigerator car, we will feel that the refrigeration effect is not as good as the beginning. In addition to its own fault, it is because the coil is too dirty. Therefore, to ensure the cleanliness of the floor in the car is the key to ensure the normal operation of the refrigeration unit.

Handling arrangement of refrigerated truck

Turn off the refrigerator when the door is opened; Shorten the door opening time as much as possible; When loading and unloading goods, use bar curtains as far as possible. Use partitions to separate dry goods (empty baskets) from perishable goods.

In order to ensure the temperature of the goods in the compartment, it is recommended to use the strip curtain for the distribution vehicles in the city, so as to ensure that the air-conditioning in the compartment will not be lost quickly when the refrigeration unit is not turned off.

Goods with different temperatures are strictly prohibited to be stored in the same compartment. They should be separated by partitions. Because the refrigerator is used to maintain the temperature of the goods, not to cool them down, the mixed loading of goods with different temperatures will affect the temperature of the goods and affect the quality of the goods.

Correct operation and use of refrigerated truck is the key to ensure the quality of temperature controlled goods. It is also the place to ensure the normal operation of refrigeration equipment.

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