Supermarket freezer condensation and the reason for the lack of refrigeration

Why does this happen in summer?
Supermarket refrigerators are used as refrigeration equipment. The temperature inside the supermarket refrigerator is always low, especially the temperature of the freezer is generally lower than minus 18 degrees. The door seal of the freezer has sufficient thermal insulation, but it cannot be compared with the door or cabinet after all. In summer, when the ambient temperature rises and the temperature difference between inside and outside increases greatly, when the humidity of the freezer reaches a certain level, the door sealing strip condenses after contacting the dew point, and the lower door of the freezer is noticeable. Because the temperature at the bottom of the freezer is the lowest, the condensation at the bottom of the freezer door seal is the most.
Supermarket freezer
First of all, don't worry about the appearance of condensation in the summer door seal is normal. To reduce the occurrence of condensation, please note the following when using:
1. The temperature control adjusts the gear to adjust the low gear to the maximum extent, such as 1-3 gear
2. In the summer rainy season, you can use soft cloth to wipe the door surface and other dew condensation parts to reduce the dew condensation phenomenon.
3. Put the freezer in a well-ventilated place.
The temperature of the refrigerator compartment is high, and the surface temperature of the evaporator on the inner wall of the refrigerator is low during operation. Therefore, if air moisture is collected in the freezing compartment, ice beans or frost will condense. Or it is normal for eye cream to flow into the water from the air outlet.
Supermarket freezer
In order to reduce the phenomenon of frost and ice, please pay attention to the following when using the refrigerator in the supermarket:
1. Freezer minimizes the number of door openings and door opening time.
2. After the refrigerator is closed, you must check whether the cabinet door is tightly closed to prevent the air leakage of the door seal flash seam.
3. There should be some space when putting food in the freezer. In particular, food should not be close to the rear wall of the cold storage interior wall.
4. Try not to put food with much water in the freezer. To ensure placement, it is best to seal with plastic wrap.
5. Check whether the drain pipe is blocked by foreign objects. If it is blocked, use a through-hole pin or other similar plastic rod to clear it.
Supermarket freezer failure: it can start automatically within a minute, a period of time, and a few minutes. The probability of rafting is too low to achieve the cooling effect.
Failure analysis and maintenance of supermarket freezer: The temperature of freezer freezer is insufficient, and the temperature of freezer exceeds 10, indicating that the thermostat has the ability to adjust the temperature. However, even if the refrigerator temperature adjustment knob is adjusted, unless it is placed in the normally open gear, the cooling effect cannot be achieved. The probe of the heat pipe is not stuck in the specified position, but hangs behind the condenser panel and closely adheres to the condenser pipe. Therefore, each time the temperature sensor probe starts to sense the low temperature quickly and directs the shutdown. Move the probe of the temperature sensing tube to the specified position on the outer panel of the condenser, and the freezer will return to normal.
Why doesn't the supermarket freezer cool?
1. Improper adjustment of refrigeration expansion valve and overflow valve, excessive adjustment of refrigerant in the system, presence of air in the cooling system, poor sealing of valve plate parts, wear of compressor cylinder liner piston, etc.
2. The high-pressure output buffer tube in the compressor is damaged, the screw fixing this tube is loose, the high-pressure tube does not exhaust, and the low-pressure tube does not suction, so the compressor works, but does not cool.
3. The refrigerant leaks, and the refrigerant is completely gone. The compressor runs, but the system has no refrigerant and absorbs heat through evaporation, so the temperature of the freezer will not drop.
4. The capillary is blocked, the refrigerant evaporates on the evaporator, does not enter the heat absorption, and the temperature of the freezer does not drop.
5. Due to brazing or improper use of the freezer, the refrigeration system has leakage points. The refrigerant in the freezer in the refrigeration system is completely lost within a certain period of time and cannot be cooled.
6. Confirm whether the freezer uses the correct gear. Different gears will affect the power consumption and temperature of the freezer.