What are the phenomena of lack of refrigerant in air conditioners?

Although the autumn is more intense after the eleventh, the hot weather in the south continues, and all the air conditioners have not been completely put on hold. Today, the refrigerant supplier-Xiaobian will introduce some common judgment methods for the lack of refrigerant in air conditioners. hope that it can help us.

1. The tracheal valve (thick tube) is dry. There is no obvious cooling sensation when touched by hand. The reason is the lack of fluorine, which leads to a decrease in the boiling point of the refrigerant in the evaporator, which increases the heat of the refrigerant in the valve and the temperature of the valve.

2. The liquid pipe valve (thin tube) is frosted. The reason is the lack of fluorine, which causes the pressure in the liquid pipe to drop and the boiling point to drop, making the valve temperature lower than the freezing point.

3. Open the indoor unit panel and remove the filter, you can find that only a small part of the evaporator is frosted. This is the result of insufficient refrigerant and a corresponding reduction in cooling area.

4. There is no heat in the exhaust air of the outdoor unit. The reason is that the refrigerant is insufficient, which causes the condensation pressure and temperature to decrease.

5. The drainage hose has little or no drainage. The reason is that the cooling area of u200bu200bthe evaporator is reduced, the condensation area is also reduced, and the amount of condensed water is reduced.

6. The gas-liquid valve of the outdoor unit is oily. The reason is that the refrigerant and the refrigerating oil have a certain degree of mutual solubility. After the refrigerant overflows from the leakage point, the oil stains adhere to the periphery of the leakage point.

7. The pressure measured from the fluorine filling port of the outdoor unit is lower than 0.45MPa. The reason is that the refrigerant is insufficient, causing the evaporation pressure to drop.

In addition, if the liquid pipe valve (thin pipe valve) is frosted, it means that the fluorine deficiency is serious; only the tracheal valve (thick pipe valve) is frosted , Indicating that there is a slight lack of fluorine or the ambient temperature is too low; both valves are frosted, indicating that the system has a secondary throttling phenomenon.

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