15 common sense of refrigeration and air conditioning!

15 common sense of refrigeration and air conditioning! 1. The air conditioner cannot be restarted immediately after it is turned off After the central air conditioner is shut down, it can only be operated after 3 minutes. This is because the timing protector will automatically work to prevent the compressor from being shortened or compressor malfunction due to frequent compressor startup in a short time. 2. Air conditioning and refrigeration sometimes blow out mist When the indoor temperature and humidity are high, the air conditioning refrigeration will blow out mist. This is caused by the cooling of water vapor in the air. When the indoor temperature and humidity are reduced, the mist will disappear. This is a normal phenomenon, and you don’t have to worry too much when using it. If there is too much condensation on the tuyere, you need to have a professional check it. 3. Dirty filter clogging will lead to poor cooling effect Sometimes we feel that the wind speed of the indoor unit is significantly reduced compared with before, and the cooling effect becomes worse. At this time, you should first check the filter of the air conditioner. A dirty filter can cause poor results. Fourth, the air conditioner may smell bad because of poor drainage If the condensed water in the indoor unit's water receiving tray is not drained cleanly (drainage is not smooth), the water will accumulate in the water receiving tray for a long time, resulting in dead water, producing harmful substances such as mold, and the air blown by the air conditioner Odor, this time should be repaired in time. Fifth, the heating mode is turned on, it is normal for the indoor unit to start up with a delay In order to ensure that the air blown from the indoor unit is hot during heating, the heat exchanger temperature sensor of the indoor unit will detect that its temperature exceeds 35 degrees before turning on the fan. The temperature increase requires a process, which is about 2-3 minutes. about. 6. Central air-conditioning control accuracy can reach ±0.5℃ Central air conditioners generally use DC frequency conversion technology, which has the advantage of accurate temperature control. The temperature setting accuracy of the controller can reach ±0.5℃, so it will be more comfortable to use. 7. 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 heat. The function of fresh air system is to introduce outdoor clean air into the room. Generally, central air conditioning and fresh air system need to be installed in order to improve air quality. 8. In winter heating operation, the air conditioner will perform defrosting operation regularly In the heating operation in winter, the surface temperature of the heat exchanger of the outdoor unit will be very low. When it is lower than 0 ℃, the moisture in the air will form frost on its surface. The higher the relative humidity of the air, the outdoor unit will be hot. The lower the surface temperature of the exchanger, the more severe the frost formation. Nine, the summer air conditioning setting is most suitable for 26 degrees There are two aspects to consider when setting the temperature in summer: one is how many degrees to save power; the other is how much to set comfortably, and you won’t get air-conditioning. Opening 26℃ is the most suitable temperature, and it is energy-saving and healthy. 10. Air conditioners need to be cleaned and maintained on time Clean the filter regularly, usually every 2 weeks. When cleaning, you need to pull out the filter, and use a dry soft brush to filter the dust on the filter. You can also wash off the dust on the filter with clean water. Let it dry before using it in the air conditioner. For environments with a lot of dust, filter cleaning needs to be more frequent to prevent insufficient airflow from the air conditioner and the growth of bacteria to affect health. 11. The indoor unit emits a "bang-bang" running sound When the air conditioner is running, the indoor unit sometimes emits a "boom-boom" running water sound or a "clucking" sound. This sound is a normal sound made by refrigerant flowing in the pipeline, not a malfunction of the machine. 12. The remote control does not display the temperature In auto and air supply mode, the remote control does not display the temperature. During automatic operation, the air conditioner automatically selects the cooling, heating, or air supply mode according to the indoor temperature. General cooling: above 23 degrees; heating: below 23 degrees; temperature control within 26 degrees. 13. The air vents face upward when cooling, and the air vents face downward when heating Many people are not good at using the wind direction when turning on the air conditioner. Generally speaking, cold air goes down, while hot air does the opposite. When cooling, it is best to turn the air conditioning air upwards to allow cold air to circulate from top to bottom. When heating, let the air conditioner wind down, you can make full use of the physical characteristics of cold and hot air, natural communication. Fourteen, 1P, 1.5P, 2P, 3P applicable area 1P is suitable for rooms of about 10~15 square meters; 1.5P is suitable for rooms of 16~26 square meters; 20~37 square meters need to use 2P air conditioners; 30~58 square meters need to use 3P air conditioners; and about 70 square meters The room needs 5P air conditioning. Fifteen, air conditioning dehumidification function The power consumption of the air conditioner in the dehumidification mode is the same as that in the cooling mode. However, in the dehumidification mode, the operation time will be shorter (the outdoor unit is stopped after the humidity is reached), and the power consumption at this time will be lower than that during the cooling operation.

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