Frequently Asked Questions on the Use of Small Refrigerator Boxes and Coolers 1. The refrigerator can reduce the temperature of the cargo to the minimum temperature of the refrigerator. Answer: wrong. The role of the box is to keep heat, and the role of the refrigerator is to ensure that the temperature of the goods in the box does not change, and the temperature of the goods cannot be reduced. For example, some customers who pull meat, put the cut meat of the animal that has just been slaughtered directly into the box, and the temperature of the refrigerator cannot be beaten. The refrigerator can easily knock down the temperature of the air, but it is difficult to knock down the temperature of the cargo, because the specific heat value of the cargo is nearly 1000 times that of air. 2. It is difficult to hit the goods with low temperature, and it is easy to cool the goods with high temperature? Answer: wrong. The ice cream temperature is controlled at -18 degrees, which is easy to beat. On the contrary, Mengniu's probiotic milk, as well as fruits, vegetables, and yeast, it is difficult to hit the temperature of the items that produce heat by themselves. Mengniu's probiotic milk can only be controlled at about -4 degrees, and the temperature in the probiotic cup can be controlled at about 4 degrees. This is the case. 3. The fewer the goods, the better the temperature? Answer: wrong. The less the cargo, the larger the volume of air in the box. This is one of the reasons why the temperature of Mengniu's probiotic milk is difficult to beat. Reasons: 1) The volume of air is too large for half a car. 2) The cargo itself produces heat. 4. Can a good quality refrigerator blow mist out of the box? Answer: wrong. The main reason for the fog is that there is too much water in the cabinet or the refrigerator is not draining well, which is not a good phenomenon. You can judge it by looking at the thermometer. It can also be judged by the water outlet on the outside of the refrigerating cabinet. If the heating process continues, it is normal for water to flow out of the cabinet, otherwise the self-flow nozzle is blocked. 5. Is the refrigerator exposed to the sun? Answer: wrong. The higher the ambient temperature outside the cabinet, the worse the cooling effect. For example, 1) The refrigerator is exposed to the sun for a long time. 2) The short-term weather with a high temperature of 40 degrees in summer is a severe test for refrigerators, and many problems will occur in refrigeration. 6, the temperature on the display of the refrigerator does not reach the temperature required by the cargo, the refrigerator is playing a negative role. Answer: wrong. The ice cream storage temperature is -18 ° C. Packing and opening the refrigerator shows the temperature of 2-3 ° C, or even 7-8 ° C. This is the temperature of the air in the cargo box. As the refrigeration continues, the temperature of the display also decreases. Some refrigerators can reach -18 degrees, and some refrigerators can not reach -18 degrees, such as -13 degrees. There is no problem with the quality of the goods. 7. The temperature of the refrigerator display is increasing, which proves that the temperature of the cargo is increasing. Answer: wrong. The temperature of the display only represents the temperature of the air between the packages in the box, and does not represent the temperature of the goods. The specific heat value of the air is very low, which easily causes the temperature to rise, and does not mean that the temperature of the goods has increased. 8. The larger the refrigeration capacity of the refrigerator, the better. Answer: wrong. The advantage of large cooling capacity is that the temperature of the box is fast, the pressure in the compressor system is reduced quickly, and the horsepower of the engine is less consumed. However, the disadvantage is that the power consumption of the battery is relatively large, and the battery often loses power and cannot catch fire, especially in diesel cars. The best principle for installing a refrigerator in a refrigerated truck is matching. It is not good to be large or small. 9.The refrigerators of domestic A houses have larger refrigeration capacity than the refrigerators of imported B houses. Answer: wrong. There is no way to match the coolers of different sizes to the cooling capacity, not a level. 10. The insulation of the cabinet is not important, as long as it matches a good cooler. Answer: wrong.
Cheng Li's new craft box can guarantee ice cream at -18 degrees. In the absence of a refrigerator, there is no problem in quality for 20 hours. However, the refrigerating box of the color steel plate is continuously cooled for 20 hours, and the goods in the box will also have different degrees of chemical goods. The reason is that the thermal insulation box is the basic guarantee to ensure that the goods do not conduct heat, and the refrigerator is the reason to ensure that the air temperature in the box drops. The refrigerator can ensure that the temperature of the air drops, but it cannot guarantee that the heat of the cargo can be conducted outside through the box. Therefore, choosing a good box for a refrigerated truck is more important than choosing a good refrigerator.