When we use central air conditioning, we sometimes encounter some problems, such as why the air blown by air conditioning smells bad? How often does the air conditioner filter have to be cleaned? How many degrees is the most energy-saving to turn on the air conditioner in summer? You will find the answer through this article.

First, the air conditioner cannot be restarted immediately after it is turned off.

After the central air conditioner is turned off, it must take 3 minutes to run. This is because the timing protector will work automatically to prevent the compressor life from shortening or compressor failure caused by frequent startup in a short time.

Second, air conditioning refrigeration sometimes blows out fog.

When the indoor temperature and humidity are high, air conditioning and refrigeration will blow out fog. This is caused by the cooling of water vapor in the air. When the indoor temperature and humidity decrease, the fog will disappear, which is a normal phenomenon, so don't worry too much when using it. If the tuyere is exposed too much, it needs professional inspection.

Third, dirty filter screen will lead to poor refrigeration effect.

Sometimes we feel that the wind speed of the indoor unit is obviously lower than before, and the cooling effect is worse. At this time, you should check the filter screen of the air conditioner first. A dirty filter will lead to poor results.

Fourth, the air conditioner may blow out peculiar smell because of poor drainage.

If the condensed water in the indoor water tray is not discharged (poor drainage), water will accumulate in the water tray for a long time, producing harmful substances such as stagnant water and mold, which will make the air blown by the air conditioner smell. It will be repaired in time at this time.

5. Turn on the heating mode, and it is normal for the indoor unit to start with delay.

When heating, in order to ensure that the air blown by the indoor unit is hot air, the temperature sensor of the heat exchanger of the indoor unit will detect that the temperature exceeds 35 degrees before turning on the fan. It takes a process to raise the temperature, which takes about 2-3 minutes.

Six, the central air conditioning control accuracy can reach 0.5℃

Central air conditioning generally adopts DC frequency conversion technology, which has the advantage of accurate temperature control. The controller can accurately set the temperature to 0.5℃, so it will be more comfortable to use.

Seven, central air conditioning and fresh air system are two concepts.

Central air conditioning and fresh air are two systems. Air conditioning is used for indoor cooling and heat dissipation, and fresh air system is used to introduce clean outdoor air into the room. Generally, central air conditioning and fresh air system need to be installed together to improve air quality.

Eight, heating operation in winter, air conditioning will defrost regularly.

During heating operation in winter, the surface temperature of outdoor heat exchanger will be very low. When the temperature is lower than 0℃, the moisture in the air will form frost on its surface. The higher the relative humidity of air, the lower the surface temperature of outdoor heat exchanger, and the more serious the frost will be.

Frosting will hinder the circulation of air and affect the heat transfer efficiency of heat exchanger. Therefore, it is normal that the unit will perform defrosting operation.

Nine, the summer air conditioning setting is 26 degrees.

There are two aspects to consider when setting the temperature in summer: first, how many degrees of electricity can be saved; The second is how many degrees of comfort should be set to avoid air-conditioning disease. Experts believe that 26℃ is the most suitable temperature, which is energy-saving and healthy.

For people who sit still or do light work, when the air conditioner is set at 26℃, the indoor humidity is about 50%, which is when the human body is comfortable, and the human body temperature is 24-27℃. Considering energy saving, it is most suitable to open it at 26-28℃ in summer night.

In addition, the indoor and outdoor temperature difference should not be greater than 5℃, which will lead to air conditioning disease. When the air conditioner is used for refrigeration, raising the temperature by 2℃ can save electricity by 20%.

Ten, air conditioning should be cleaned and maintained on time.

Always check whether the air conditioning power supply is good, whether there is poor contact or the air switch (plug) is too hot.

Pay attention to whether the drainage is smooth and whether the air outlet of the pipeline or indoor unit leaks.

Clean the filter regularly, usually once every two weeks. When cleaning, you need to pull out the filter screen and brush the dust off the filter screen with a dry soft brush. You can also wash away the dust on the filter screen with clean water. Dry it and put it in the air conditioner for later use. For the dusty environment, the filter screen needs to be cleaned more frequently to prevent the air volume of the air conditioner from being insufficient and the bacteria from growing and affecting health.

If the air conditioner is not used for a long time, it needs to be cut off. All-round cleaning is recommended to keep the equipment dry.