What is the reason for freezing at the connection of outdoor unit of air conditioner?

1, icing of outdoor unit of air conditioner-refrigerant consumption of air conditioner

When there is more or less refrigerant in the air conditioner, the outdoor unit of the air conditioner will freeze. For air conditioners, if the refrigerant is insufficient, the evaporator pressure of the air conditioner may be relatively low, resulting in freezing.

If there is too much refrigerant, it may also cause the outdoor unit of the air conditioner to freeze. If this happens during use, it is recommended to ask professional maintenance personnel to remove fluorine from the air conditioner.

2. The outdoor unit of the air conditioner freezes-the compressor of the air conditioner is out of order.

Another reason for the freezing of the outdoor unit of the air conditioner is that the compressor of the air conditioner has failed. In the process of long-term use, the compressor will freeze inside the air conditioner because of damage or power reduction. If we want to solve this kind of problem, we must check it in time. If we can't solve this problem well, we can only replace the compressor.

3. The outdoor unit of the air conditioner freezes-a lot of dust is accumulated.

If the air conditioner is used for a long time, it is likely that a large amount of dust will accumulate inside the air conditioner, causing operational failures, including the freezing of the outdoor unit of the air conditioner.

A large amount of dust will hinder the normal operation of the evaporator inside the air conditioner, leading to the reduction of heat exchange, which will lead to the freezing of the outdoor unit of the air conditioner.

The best way to solve the problem that the outdoor unit of air conditioner freezes due to dust is to clean the air conditioner regularly. Because cleaning is not as simple as we thought, we can find professionals to clean the air conditioner.

Extended data

When the air conditioner is in refrigeration operation, refrigerant gas with low temperature and low pressure is sucked by the compressor and pressurized into refrigerant gas with high temperature and high pressure.

The high-temperature and high-pressure refrigerant gas releases heat in the outdoor heat exchanger through the condenser (usually air-cooled air conditioner, that is, the radiating copper tube of the outdoor unit) and becomes a medium-temperature and high-pressure liquid (the heat is taken away by the outdoor circulating air).

The medium-temperature and high-pressure liquid becomes a low-temperature and low-pressure liquid after capillary expansion and depressurization.

The low-temperature and low-pressure liquid refrigerant absorbs heat and evaporates through an evaporator (indoor unit copper tube) and becomes a low-temperature and low-pressure gas (indoor air is cooled through the surface of a heat exchanger to achieve the purpose of reducing the indoor temperature).

Low-temperature and low-pressure refrigerant gas is sucked again by the compressor, and so on.

Baidu Encyclopedia: Refrigerant for Air Conditioning

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Baidu Encyclopedia: Air Conditioning Evaporator

Baidu Encyclopedia: Air Conditioning Outdoor Unit Cover