Four seas network: in summer, people use air conditioning for a long time, resulting in frequent air conditioning problems. We often encounter the problem that the air is not cold enough after the air conditioner is turned on and the indoor temperature can not go down. And not only the refrigeration effect is poor, but also frost appears in the internal machine. What's the matter?
The reason of frost on the cooling pipe of air conditioner
Frosting of high pressure pipe is caused by low condensation pressure of system. The compressor circulates the refrigerant to the condenser, uses the fan to dissipate heat and condense, and then transmits it to the evaporator of the internal machine for refrigeration through the capillary throttling. At the end of the condenser, the refrigerant evaporates when it reaches the capillary. If the refrigerant is not enough, throttle through the capillary. When the capillary frost reaches the connecting pipe of the internal and external machine, the evaporation point will be very low, and then the high-pressure pipe will frost.
How to deal with the frosting of air conditioning tube
1. Basically 98% of the reasons are due to the lack of refrigerant. 99% of this reason is due to installation problems. Check whether the connecting pipe is tight. If there is an extension during installation, check whether there is sand hole at the welding joint. If there is a reduction in the length of the connecting pipe, it is necessary to check whether the flared mouth is qualified.
2. Another 0.5% of the reasons may be the leakage of the system caused by the quality problem of the machine itself. If it is this problem, it needs to be checked and repaired by professional maintenance workers.
3. Another 0.5% is caused by the blockage of the capillary tube of the machine. At this time, the high-pressure pipe of the air conditioner will frost, and the capillary tube in the machine will also frost. The current will rise slowly from the start of the machine until the compressor is overheated and shut down. If this is the reason, it is OK to replace the capillary tube after the refrigerant is discharged.
4. If the electronic expansion valve is used, check whether the electronic expansion valve is faulty. If there is no problem, it is recommended to replace the tube temperature thermistor of the internal machine, because it will affect the opening and closing degree of the electronic expansion valve.
When we turn on the air conditioner, we may find that the air conditioner has been working abnormally since it was started for some time. Not only the refrigeration effect is poor, but also frosting occurs in the internal machine. What's the matter?
Do you charge for adding fluorine during the warranty period of air conditioner
As long as the refrigerant leakage is not caused by human, there is no charge for adding fluorine during the warranty period. If the maintenance staff charges you, you can make a complaint. However, if fluorine is added beyond the warranty period, the maintenance staff shall be paid for fluorine addition.
Standard for fluorine collection of air conditioning
The price of fluorine in air conditioning is generally between 100 and 200 yuan. It's not air conditioning refrigerant, it's artificial. In fact, the price of refrigerants is very cheap. In general, the air conditioner needs to add fluorine in the refrigeration mode of the air conditioner, and then find the opening for adding fluorine in the air conditioner. Generally, adding fluorine is on the rough pipe of the air conditioner. When adding fluorine, you need to top up 4 pressures.