Analysis on several major reasons and maintenance methods of central air conditioning in Chongqing Midea

Before analyzing the reasons why air conditioners don't cool, I think it is necessary for us to have a brief understanding of the principle of air conditioning refrigeration. Here, we just briefly explain the principle of air conditioning refrigeration: the principle of air conditioning-the compressor turns into high-pressure and high-temperature vapor by compressing the refrigerant in low-pressure vapor state, and then turns into high-pressure and low-temperature liquid after being cooled by the condenser radiator pipe of the outdoor unit. Through the control of some devices, it flows to the indoor evaporator at a relatively stable pressure and flow rate. The high-pressure and low-temperature liquid refrigerant evaporates into vapor as soon as it meets the low-pressure environment in the evaporator, and this evaporation process will absorb a lot of heat energy (commonly known as refrigeration), and the low-pressure vapor refrigerant will flow into the outdoor compressor, and so on. In fact, this is what is described in our book: the principle of air conditioning refrigeration is to lead the indoor hot air out of the room through the compressor and the physical change between refrigerants, thus reducing the indoor temperature.

As a popular household appliance, air-conditioning users seem to be very familiar with the use of air-conditioning, but once faced with the failure of air-conditioning, it seems a bit at a loss. One of the most common faults of air conditioners is that they don't cool. In hot summer, if the air conditioner just rumbles and doesn't cool, do you feel annoyed? Today, we will talk about the reason why the air conditioner does not cool from the user's point of view.

There are many reasons why air conditioners do not cool. As a home appliance lover and air conditioner user, I have seen and heard all kinds of reasons why air conditioners don't cool. Here, I list several situations in which air conditioners are least cooled from the perspective of use, for the reference of users who have such unpleasant experiences. Maybe you can find the real reason why the air conditioner doesn't cool, and solve it quickly!

Here is a detailed introduction to the reasons why various common air conditioners do not cool:

One of the reasons why air conditioners do not cool.

Reason: Freon is not enough (commonly known as insufficient snow species)

Solution: Adding snow seeds can solve the problem that the air conditioner does not cool.

Most of the reasons for this lack of refrigeration are air conditioners that have been used for three or four years, and most of them are normal phenomena. Refrigerant belonging to air conditioning (that is, freon or snow) is normally consumed due to long-term use, but this is only manifested in the fact that the air conditioner is not cooled enough than before under normal conditions, and it will not be completely uncooled, because the pressure is not enough and it will not be too far related to the normal value. At this time, you just need to find a regular maintenance network to supplement it. Of course, there are also some snow species missing due to installation reasons or the machine itself, which is a common and easy reason to find, and this kind of problem is also easier to deal with. Check the pressure with a pressure gauge. If it's not enough, just add it.

The second reason why air conditioners don't cool.

Cause: insufficient power supply voltage.

Solution: Keep the normal power supply voltage.

I once met a user who always said that the air conditioner at home was not cold enough. It was checked over and over again, and the result was normal. I checked it several times and found no problems. Later, when I checked, I finally found that the power supply voltage there was unstable and often failed to reach the normal voltage, especially during the peak period of electricity consumption. The performance of this problem is: when the voltage is normal, the air conditioning refrigeration is normal, and when the voltage is unstable, it will affect sometimes the air conditioning is not cold. Of course, this problem is obviously not solved by a skilled air-conditioning maintenance master. We must solve the problem by providing a stable voltage.

The third reason why air conditioners don't cool.

Cause: The air conditioner has insufficient power and does not cool.

Solution: Make the cooling capacity required by the power space of the air conditioner match.

This is also one of the common reasons for not cooling, but there are many reasons for not cooling, such as: rooms with large area of low-power air conditioning pipes, and some rooms are relatively closed (such as doors and windows are wide open). ), or there is a heat source (such as a computer) in the room. Of course, the western drying of glass houses is also one of the heat sources, and so on. This situation is easily overlooked by us. If we can find the reason and solve it well, it will not only make the air conditioner cooler, but also save electricity and prolong the service life of the air conditioner. To solve this kind of problem, we can only increase the number of air conditioners (make the actually needed refrigeration area match the refrigeration area that the air conditioning power can control); Change the conditions of the use environment; Increase the sealing of the use environment; Reduce the heat source in the air-conditioned environment and so on to solve the problem of no refrigeration.

The fourth reason why air conditioners don't cool.

Cause: Due to the high external temperature, the air conditioner does not cool.

Solution: Change the use environment of the outdoor unit (away from high temperature environment or make the air around the outdoor unit easier to circulate).

This kind of uncooled situation is common when our outdoor unit is installed in a relatively closed space or the temperature around the outdoor unit is too high. For example, in some buildings, outdoor units are installed in a hidden small space or even a plurality of outdoor units are placed in a small space for the sake of beauty, which will easily cause the air in the small space where the outdoor units are located not to circulate, so that the heat emitted by the radiator cannot flow away, resulting in the air conditioner not being cooled. There is a common saying that when the outdoor temperature exceeds 43 degrees, it is difficult for most air conditioners to transfer indoor heat to the outside through the radiator of the outdoor machine, which will also cause the air conditioners to be uncooled.

The fifth reason why air conditioners don't cool.

Reason: The air conditioner is not cleaned and maintained for a long time.

Solution: clean and maintain the air conditioner, so that the clean outdoor unit can dissipate heat later.

We bought air conditioners, and everyone thought we could enjoy them with peace of mind. Actually, it is not. We must maintain air conditioning in many ways. One of them is easily overlooked because the outdoor unit is installed outdoors. After being used outdoors for a long time, a lot of dirt such as dust and garbage will be adsorbed on the radiator, which will make the radiator have poor heat dissipation effect and the air conditioner cannot cool. In addition, long-term neglect of air conditioning maintenance will make indoor air unsanitary, more prone to air conditioning diseases, increase power consumption, shorten the service life of air conditioners, and so on.

The sixth reason why air conditioners don't cool.

Cause: The copper tube between outdoor unit and indoor unit is too long.

Solution: Try to shorten the length of copper tube between outdoor unit and indoor unit of air conditioner.

Some air conditioners are too long because of the need of installation or unreasonable installation, and the low heat transfer efficiency will also cause the air conditioner not to cool.

Of course, there are many reasons why the air conditioner does not cool, such as the aging of the air conditioner compressor, and so on. Xiao Nuo of Chongqing Midea's central air conditioner lists the above common situations here.