Knowledge about adding fluoride to air conditioners

Introduction: Fluorination can generally be defined as adding fluoride to air conditioners, that is, using professional tools to add refrigerant (Freon) to the air conditioner compressor. The following will tell you the essential knowledge about adding fluoride to air conditioners.

1. Why does air conditioning need to add Freon?

Freon is the medium that transfers heat in the air conditioning and refrigeration system. Without it, heat cannot be exchanged efficiently. The air conditioner also cannot cool or heat. Therefore, once the air conditioner lacks fluorine, it will externally show poor cooling (heat) effect, no cooling (heat), protective shutdown, indoor unit leakage (sometimes water spray), indoor unit evaporator freezing, etc. There are even more problems that cannot be seen on the surface - reducing the service life of the air conditioner, wasting electricity, and damaging the air conditioner compressor. Therefore, if you want to use the air conditioner normally, you must have enough Freon.

2. Under what circumstances should fluoride be added to the air conditioner?

1. If it has been used for more than 5 years (split air conditioners will naturally leak);

2 , the machine has been moved multiple times (part of the Freon will be consumed when the air conditioner is installed and emptied);

3. In summer, the exposed thick pipe (i.e. low-pressure pipe) at the connection point of the outdoor machine does not condense or cool.

4. The outdoor fan exhaust is not hot in summer;

5. The return air pressure (thick pipe) is lower than 0.4 MPa in summer;

< p>　6. The operating current of the compressor is less than the normal value marked on the nameplate;

7. The high-pressure pipe (thin tube) is frosted in summer;

8. The internal unit of the air conditioner is frozen in summer Or blowing fog (sometimes accompanied by water leakage from the internal unit);

9. In winter, the thick pipe at the copper pipe interface of the external unit is not hot when you touch it;

10. The air conditioner has Leak point;

11. The air conditioner shut down within ten minutes after being turned on. (Low-pressure protection or compressor overheating protection)

3. Can more fluoride be added to the air conditioner?

Of course not. The reason why air conditioners can cool is because Freon evaporates and absorbs heat to achieve a cooling effect. Adding too much will cause Freon to evaporate not on the evaporator of the indoor unit, but on the connecting pipe of the return air pipe. The cooling effect cannot be achieved. And it will cause the air conditioner to shut down for protection (high voltage protection).

4. How much Freon should be added to the air conditioner to make it full?

In hot weather in summer (when the ambient temperature is above 32 degrees Celsius), the pressure gauge pointer can be stable at 0.45MP. In spring and autumn it is 0.3MP. Fluoridation in winter does not exactly follow the pressure gauge reading (reference pressure is 1.8 MPa). Instead, rely on the experience of the maintenance personnel or watch the swing range of the pressure gauge pointer. Fluoride can also be added by measuring current.

5. How much does it cost to add fluoride to an air conditioner?

This is probably the topic that air conditioner users are most concerned about. The air conditioning repair market in Hefei is a mixed bag. It's as messy as a pot of porridge. It often happens that a hanging air conditioner costs nearly 200 yuan to add fluoride. In fact, these are all traps left to users by low-cost machine relocation or low-cost installation. Tell you how to not be ripped off.

Take wall-mounted air conditioners in summer as an example (the maximum cost will not exceed 20 yuan)

◆The following recommended prices only refer to adding fluoride after installation is completed, and do not include door-to-door service fees charges in the case.

1. When there is no fluorine, it is more reasonable to charge about 80 yuan because of vacuum treatment;

2. The refrigeration effect is extremely poor, and the pressure gauge shows close to zero. The high-pressure pipe of the outdoor unit is heavily frosted, but there is still a little bit of Freon. It is more reasonable to charge 60 yuan;

3. The air conditioner is cooling, but the effect is not ideal. It is more reasonable to charge 50 yuan;

4. The air conditioner is working normally, but the pressure gauge shows that the return air pressure is less than 0.45 MPa, so it is more reasonable to charge 40 yuan.

5. Reminder: If you make a special trip to add fluoride, even if you add a little bit, it will not be less than 60 yuan. Therefore, it is the wisest choice to top up the fluoride after the air conditioner is installed.

6. Is it reasonable to charge according to pressure for adding fluoride to air conditioners?

Not only is it unreasonable, but it should not be what a professional air conditioner repairman should say. Because the pressure of the refrigeration system changes at any time as the ambient temperature changes. During the fluoridation process in winter, there is actually no pressure at all, so how can we charge based on pressure? Even if it is not winter, the pressure displayed by the pressure gauge can only be used as a reference value. Most maintenance personnel in the Anqing air-conditioning fluoride market like to charge according to the pressure. And OnePlus has 7, 8 or a dozen pressures. If a pressure is 30 yuan, please calculate how much it costs. Let me tell you, you are being ripped off again at this time. Because the maximum pressure of the air conditioning system during cooling is only 5, that is, 0.5 MPa.

7. How long does it take to add a fluorine tube to the air conditioner?

This question is not easy to answer. Because the air conditioner itself does not consume Freon during use. The reason why fluoride is added is because Freon will naturally leak during the use of the air conditioner.

The speed of natural leakage depends entirely on the technical level of the installer and the welding quality of the air conditioning ducts. But generally it can be used for at least 5 years after adding it once. There are also cases where the pressure of air conditioners remains normal even without fluoride added for 10 years.

8. How long does it take to add fluoride.

After the special pipes for adding fluoride to air conditioners are connected, it only takes about 5-10 minutes to complete the operation of adding fluoride to an air conditioner. The so-called "I'll give you a little more time and top up" is purely intentional to please and deceive customers.