What is the reason why the refrigerator does not frost when turned on after replacing the evaporatio

The compressor runs for a long time, while the surface of the evaporator does not frost, only water beads. The main reason for this failure in the normal use of the refrigerator is that there is a refrigerant leakage point in the refrigeration pipeline, and the intake and exhaust valves in the compressor unit are damaged, resulting in the reduction of the refrigerant effect.

If the temperature is too high. 1. First of all, due to poor air circulation, the heat transfer efficiency decreases, so that the temperature in the refrigerator cannot be lowered. If too many items are placed in the box, the air flow will be affected; The frost on the surface of the evaporator is too thick, so that the cooling energy cannot be transmitted to the box, which affects the refrigeration effect; There is too much oil and dust on the surface of the condenser, so that the high-temperature gas in the condenser cannot exchange heat with the outside air, cannot be fully liquefied, reduces the refrigeration capacity, and causes the temperature in the refrigerated room to be high.

When the contents of the box are placed, a certain space should be left to ensure that the air is unobstructed. When the frost layer on the surface of the evaporator is too thick, it should be defrosted. The surface of the condenser should be cleaned frequently.

2. Secondly, the thermostat is not properly adjusted, and the temperature sensor tube is mistakenly placed at the inlet of the evaporator, so that when the thermostat is moving, the temperature in the box does not drop to the required value. The position of the thermostat and thermostat can be adjusted. 3. Again, the refrigeration system leaks or is blocked, which reduces the refrigeration efficiency.

In this case, it should be determined whether it is a leak or a blockage. If it is a leak, the system pipeline should be checked and repaired. If it is blocked, the filter drier can be replaced, and if necessary, nitrogen gas should be blown on the pipeline to remove impurities.

Finally, it may be that the internal fault of the compressor, which reduces the work efficiency and the cooling capacity, and the compressor casing should be cut open for repair.

After the refrigerator is replaced with an evaporation tube, it does not frost when it is turned on, it is only cold, which should work normally, and the current refrigerant has frosting and non-frosting, and the non-frosting one is better, as long as it works normally, it is OK.

The reason for the lack of frost may be that when the external ambient temperature is quite different from the internal temperature of the refrigerator, the refrigerator is often turned on and off, which will destroy the refrigerator's own internal temperature system and give the refrigerator a wrong indication. There is also the possibility of putting too much stuff in the refrigerator, which may clog the air outlet of the refrigerator.

1. It may be the result of the refrigerator fan not rotating or the speed decreased. 2. It may be because the filter is blocked. 3. It may be because of the problem of the heat exchanger itself.

4. It may be due to the lack of refrigerant, which makes the evaporation pressure low and the evaporation temperature low. 5. It may be the result of the refrigerant returning to the group.

Suggested Solution:

1. If it is caused by the refrigerator fan not rotating or the speed is reduced, you need to replace it with a new fan.

2. If it is because the filter is blocked, you need to direct the air inlet pipe of the air compressor to an area with better air quality, or add an air inlet to load a high-efficiency air filter.

3. If it is because of the problem of the heat exchanger itself, you need to find a professional to check what is the problem in the heat exchanger, and repair it.

4. If it is due to the lack of refrigerant, the evaporation pressure is low and the evaporation temperature is low, it is necessary to discharge all the refrigerant, and then use a vacuum pump to vacuum, and then use a spring scale or other injection volume according to the famous brand standard to weigh and add refrigerant.

5. If it is the result caused by too much refrigerant, it is necessary to use the fluorine bottle to heat it first, just like adding fluorine, because the thick tube is at high pressure at this time, so the freon will flow back to the fluorine tank. Or open the high-pressure pipe valve of the air conditioner, and the refrigeration agent will be discharged automatically.

According to the simple description, the shelter can basically tell that there is no problem with the refrigerator itself;

Due to the continuous operation of the refrigerator in the process of use for a long time, if the refrigerator power supply plug is not in good contact or the power socket is in poor contact, this problem may occur in the intermediate process. In addition, when there is too much ice in the freezer compartment of the refrigerator or too much frost on the evaporation surface of the evaporator in the refrigerator, there is also a possibility of some abnormal conditions.

Suggested treatment:

1. Clean the refrigerator thoroughly: turn off the power of the refrigerator, de-ice the freezer, defrost the refrigerator, then wipe all the moisture in the refrigerator, dry it for 1 2 hours and then turn it on again;

2. Wipe the outer surface of the left and right sides of the refrigerator with a clean wet towel to wipe off the surface dust;

3. Check the power plug of the refrigerator to ensure that there is no dirt or dust on the plug and pins of the plug and plug; Make sure the electrical outlets are working;

4. Observe other high-power electrical appliances, such as induction cooker and air conditioner, whether the refrigerator is abnormal when it is started, if there is no abnormality, it is recommended to supply power to the refrigerator separately.

1. It may be caused by the small amount of refrigerant in the refrigerator. 2. It may be caused by the failure of the evaporator of the refrigerator. 3. It may also be caused by the low pressure of the expansion valve of the refrigerator.

Suggested Treatment:

1. The valve next to the hot gas of the refrigerator can be adjusted. In fact, for the frosting phenomenon in most cases, you only need to adjust the pass valve next to the hot gas, the specific method is to open the end cover at the rear of the hot gas judgment pass valve, and then use the hexagon wrench of No. 8 to turn the nut clockwise, do not adjust too fast, generally about half a turn can be suspended, the sail carries the system to run for a period of time, and then look at the frosting situation and then decide whether to continue to adjust.

2. You can also increase the jumping pressure of the condensing fan. After the operation is stable and the frost of the compressor disappears, tighten the end cap. For refrigerator models below 15 cubic meters, because there is no hot gas bypass valve, so if the frost phenomenon is serious, you can appropriately increase the starting pressure of the condensing fan pressure switch flushing head.

The specific method is to find the pressure switch first, and then remove the fixed piece of the adjustment nut of the pressure switch, and then rotate it clockwise with a Phillips screwdriver, the whole process also needs to be carried out slowly, first adjust half a turn to see the situation and then decide whether it needs to be adjusted again.