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Why is the temperature drop of the newly opened refrigerator very slow?
author: supermarket refrigerated showcase category: commercial refrigeration Views: 964Time: 2016-08-22
3. Improper adjustment of throttle valve or cut-off throttle, or too large or too small refrigerant flow will directly affect the refrigerant flow into the evaporator. After the throttle is opened, the refrigerant flow increases greatly, the evaporation pressure and temperature increase, and the temperature of the freezer decreases slowly.
4. If the appearance of the refrigerator evaporator is too thick frost or too much dust, the heat transfer effect will be reduced. The evaporator has too much frost or too much dust on the surface, and the heat transfer power of the evaporator is low. Another important reason for the slow down of the storage temperature is the low heat transfer power of the evaporator.
If there is too much dust in the condenser or the freezer is against the wall, the thermal cooling is poor, which is an important reason for the deterioration of the cooling effect, especially in summer. Therefore, keeping good ventilation around the freezer and keeping the condenser clean and dust-free is the rapid guarantee for the cooling of the freezer.
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The effect of heat insulation materials and heat insulation materials may not be good, mainly because the wrong thickness of heat insulation layer is selected in design, or the quality of heat insulation materials is not good in construction. In addition, in the construction process, the heat preservation and moisture resistance of the insulation layer is damaged, which will cause moisture, deformation and corrosion of the insulation layer, reduce the heat insulation capacity, reduce the cooling capacity, increase the cold loss, and greatly slow down the temperature drop. Another important reason for the large cooling loss is that the sealing performance is not good, and more hot air flows in from the leakage. Generally speaking, if there is finishing phenomenon in the door and window seal or freezer insulation seal, it means that the seal is not strict. In addition, if the warehouse is closed frequently or many people enter the warehouse together, the cold loss will also increase. Don't open the door to avoid as much hot air as possible.
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