Why is air conditioning cooling slower and slower? And common solutions

In the hot summer, no air conditioner can be said to be a torment, but after using the air conditioner for a long time, we will find that the cooling effect of the air conditioner itself becomes slower and slower. Don’t worry, today I will give you a detailed introduction. Regarding the knowledge of air conditioners, teach you how to change the cooling effect of air conditioners! Air-conditioning is our guarantee to survive the long hot weather, and we can’t wait to stay under the air-conditioning for a long time. However, when the air conditioner is used for a long time, the cooling effect of the air conditioner does not meet the ideal requirements. Why is the cooling of the air conditioner slower and slower?

1. What is the principle of air conditioning and refrigeration?

1. The compressor compresses the gaseous Freon into high temperature and high pressure liquid Freon, and then sends it to the condenser (outdoor unit) to dissipate heat and becomes a normal temperature and high pressure liquid Freon, so the outdoor unit blows out hot air.

2. The liquid Freon enters the evaporator (indoor unit) through the capillary tube. The space suddenly increases and the pressure decreases. The liquid Freon will vaporize and become a gaseous low-temperature Freon, thereby absorbing a large amount of Heat, the evaporator will become cold, the fan of the indoor unit blows the indoor air through the evaporator, so the indoor unit blows out cold wind; the water vapor in the air will condense into water droplets when it meets the cold evaporator , Flow out along the water pipe, which is why the air conditioner will emit water.

3. Then the gaseous Freon returns to the compressor to continue compression and continue to circulate. When heating, there is a component called a four-way valve, so that the flow direction of Freon in the condenser and evaporator is opposite to that of cooling. Therefore, when heating, the outdoor air blows cold air, and the indoor unit blows hot air. In fact, it is the principle of discharging heat during liquefaction (changing from gas to liquid) and absorbing heat during vaporization (changing from liquid to gas).

2. What are the reasons for the slowdown of air-conditioning and refrigeration?

When the return air filter of the indoor unit is too dirty, the air conditioner runs in the cooling mode, and the air outlet temperature of the indoor unit is still low, but the air volume of the indoor unit is small, and the total cooling capacity of the air conditioner is small, resulting in the room The internal temperature drops slowly. When the compressor's starting capacitor ages due to high temperature, frequent voltage fluctuations and other reasons, the compressor cannot start normally and immediately. Only when the compressor is powered on for a period of time can it be started under the repeated impact of voltage and current; in this case The air from the indoor unit is not cold at the beginning of the air conditioner, and the temperature of the air from the indoor unit will only decrease when the compressor is started.

Third, how to solve the problem of slow air-conditioning refrigeration?

It is recommended to clean the return air filter of the indoor unit and dry the water before reinstalling it. In fact, it is not difficult to clean the air conditioner. The materials needed are air conditioner disinfectants or special cleaners, and these two types of materials can also be purchased in supermarkets, and the price is not expensive. In the specific cleaning process, different cleaning methods need to be combined with the style of the air conditioner. Conventionally, it mainly includes two cleaning methods of wall-mounted air conditioners and cabinet air conditioners. The difference is mainly manifested in the type of air conditioner itself. has a difference.

1. Wall-mounted air conditioner cleaning method:

(1) Turn off the power to ensure the safety of the entire cleaning process;

( 2) Open the air conditioner panel and take out the air purification filter and filter;

(3) After seeing the very dirty heat sink, take out the prepared cleaning agent and spray it a few times to reduce the distance The best control is 2～3 cm;

(4) After spraying the cleaning agent, use a rag to wipe it, preferably with a dry cloth, and wait 10 minutes after wiping;

(5) After the time has passed, install the filter and the purifier to the original place, and then turn on the cooling state for about 30 minutes. The air conditioner can drain the dirty water from the inside during the operation of the wall-mounted air conditioner. It will be cleaned up.

2. Cabinet type air conditioner cleaning method

Grille type air conditioner:

(1) Turn off the power first;

(2) Find the dusty heat sink under the air outlet, and spray the cleaning agent against the heat sink.

Slide type air conditioner:

During the cleaning process of the slide type air conditioner, first turn on the air conditioner, then turn off the power after seeing the heat sink, and then proceed to the heat sink. spray.

After spraying the heat sink for these two types of cabinet air conditioners, there is no need to wipe the heat sink with a dry cloth. After about a quarter of an hour, turn on the air conditioner in cooling mode. After another 30 minutes, the sewage inside the air conditioner will be discharged automatically, and the cleaning work is completed.

Fourth, how to carry out the daily maintenance of the air conditioner?

1. Remove debris from the vents to ensure normal ventilation. Observe whether the outdoor rack is loose, and clean the outdoor ventilation grille for foreign objects. At the same time, keep the vents unobstructed.

2. Surface cleaning of indoor and outdoor heat exchangers improves the efficiency of heat exchangers. When cleaning the indoor heat exchanger, you should carefully remove the panel, scrub with a soft cloth, and use a small brush to gently scrub the internal heat exchanger, so as to achieve the purpose of removing dust and harmful accumulations that can breed germs. But note that because the heat sink is a thin aluminum material, it is easy to deform after being stressed, so be careful to brush it.

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