Whether the air conditioner is deficient in fluorine can be understood at a glance. So how does the repairman determine whether the air conditioner is deficient in fluorine? 1. Check with your eyes that the indoor and outdoor units are operating normally, and the mode and tempera

Whether the air conditioner is deficient in fluorine can be understood at a glance

So how does the repairman determine whether the air conditioner is deficient in fluorine?

1, use your eyes to see if the indoor and outdoor units are operating normally, the mode and temperature are adjusted correctly. At this time, we can use our hands to feel whether the air blowing out is cool and whether the air blowing out of the outdoor unit is hot. If the air from the internal unit is not cool and the air from the external unit is not hot, it is basically a fluorine deficiency.

2, touch the two copper tubes of the outdoor unit stop valve with your hands. This is more commonly used and more accurate. If the thin and thick tubes are not cold at all, it means that there is no fluorine in the system. If you see knots in the thin tubes, Frost indicates fluoride deficiency. If both tubes are cold to the touch and there are water droplets, it means there is no fluoride deficiency.

3, in order to further determine whether there is a fluorine deficiency, we directly connected the pressure gauge to measure the pressure, which is the most accurate. The normal pressure is 4---6 pressure. If it is too low than 4, it means lack of fluorine.

Fluorine deficiency

If there is a lack of fluorine in the refrigeration system, the following phenomena will occur:

1. The thin and thick tube valves are dry and there is no obvious coolness to the touch. This kind of fluorine deficiency is serious. There is basically no fluorine in the system, and it will not be cool at all. .

The reason is that there is insufficient refrigerant in the boiling endpoint of the evaporator . Before the refrigerant in the valve enlarges, the temperature of the valve will increase, and the funnel-shaped temperature will be higher than the outdoor air temperature.

2, thin tube pipe valve frosting is a typical symptom of fluorine deficiency.

The reason is that the pressure of the fluid pipeline lacking fluorine drops, the boiling point decreases, and the valve temperature is lower than the freezing point.

3. Open the indoor unit panel and remove the filter. You can find condensation or frost on part of the evaporator. This is also a sign of fluorine deficiency.

The reason is that there is insufficient refrigerant, which will only cause part of the evaporator to boil and absorb heat, thus reducing the cooling area accordingly. No hot seg exhaust. The reason is that the lack of refrigerant causes the condensing pressure and condensing temperature to decrease, and the exhaust temperature decreases.

4. There is no condensation water in the condensation water pipe, and no water condensation water flows out.

The reason is that the cooling area of ​​the evaporator decreases, the condensation area also decreases, and the amount of condensed water decreases.

5. The outdoor thick and thin tube valves leaked oil, causing serious pollution.

The reason is that the refrigerant and refrigeration oil have a certain solubility , and the fluorine escapes from the funnel into the atmosphere, and the oil adheres around the funnel.

6. The measured working current is less than the rated current of the air conditioner .

The reason is the lack of refrigerant, which reduces the compression mechanical load and current.

7. When the compressor is running in refrigeration, the measured pressure is less than 0.4Mpa. The reason is that the lack of refrigerant causes the evaporation pressure to drop.

In addition, frosting on any outdoor valve is not normal; only liquid line valve frosting shows a lack of fluoride ; only tracheal frosting shows a slight fluoride valve deficiency or low ambient temperature; both valves are frosted, The system has secondary throttling.

Note 1: Do not add fluoride in heating mode. In the heating mode, the fluorinated port is in a high-pressure state, which will cause airflow to flow backwards and may cause an explosion. Be sure to operate with caution.

Notes 2. If it is winter, be sure to turn on the heating mode to add fluoride. You can unplug the four-way valve coil of the outdoor unit, turn off the power, and force the air conditioner to cool.

Air conditioner fluoride price standard:

Generally speaking, air conditioner fluoride is usually added every three years. If the air conditioner is hung up, the price of adding fluoride is 120 yuan. If it is a central air conditioner and some larger air conditioners, the price will be a little more expensive, but generally it will not exceed 300 yuan. Generally speaking, the price of freon of Gree air conditioner is around 140 yuan, while the price of freon of some vertical air conditioners is around 150 yuan. This price fluctuates greatly from place to place, and there is no unified standard. Zhao Yu can only give a rough estimate. Prices are subject to local prices.