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What Is The Priciple Of Air Conditioning System?
Jan 31, 2018

Air conditioning refrigeration priciple


Compressors compress the gaseous freon into gaseous freon with high temperature and pressure and then send it to the condenser (outdoor unit) to be a room temperature and high pressure liquid freon after cooling. Therefore, the outdoor unit is blowing hot air. Then it comes to the capillary and into the evaporator (indoor unit). As freon suddenly increases in space from the capillary to the evaporator, the pressure is reduced. Liquid freon will vaporize and change into a gaseous low-temperature freon. It absorbs a lot of heat so the evaporator will be cold. The fan in the indoor unit blows the air in the room from the evaporator, so the air blown out by the indoor unit is cold. After the water vapor in the air meets the cold evaporator, it will condense into water droplets and flow down the water pipe. This is the reason why air conditioning will be out of water. Then the gaseous Freon returned to the compressor to continue to compress and continue to circulate. There is a part called four-way valve when heating which make Freon in the condenser and evaporator flow direction is the opposite of cooling. Therefore, when heating, the outdoor unit blowing air is cold, indoor unit blowing air is hot. In fact, it is the principle of absorbing heat when the liquefied gas (from gas to liquid) learned in junior middle school physics is used to dissipate heat and vaporize (from liquid to gas).



Heating principle


Heat pump heating is making the use of refrigeration system compression condenser to heat the room air. When air conditioner is in the refrigeration work, Low-pressure refrigerant liquid evaporates in the evaporator and absorbs heat. The high temperature high pressure refrigerant in the condenser releases heat and condensates. Heat pump heat is through the electromagnetic commutation to swap the cooling system suction exhaust position. The original evaporator indoor cooling coil becomes a heating condenser. This refrigeration system absorbs the  heat outdoor and releases the heat indoor to achieve the purpose of heating.


Air conditioning is actually in accordance with the thermal expansion and contraction of the medium to be controlled. Indoor part is shrinkage, the outdoor part is thermal expansion. Expansion is through the compressor compression medium for work, this will produe a lot of heat. The pressure of the medium can become low. This is the shrinking heat, suddenly put the heat exchange into cold gas. 


Set the appropriate temperature. When cooling, do not set too low temperature. If the room temperature is transferred to 26-27 degrees Celsius, the cooling load can be reduced by more than 8%. Practice has proved that for people who sit or mild work, the room temperature maintained at 28-29 degrees Celsius, the relative humidity remained at 50-60%, people do not feel hot. It will not sweat and should belong to the comfort range. When people sleep, the metabolic has a reduction of 30-50%. Air conditioning can be set in the sleep switch block. Set the temperature 2 degrees Celsius lower, can achieve energy-saving 20%. When winter heating, set the temperature 2 degrees Celsius lower, can also save 10% energy. 


Choose the right air conditioners. Some air conditioners lack of refrigeration capacity not only can not provide adequate cooling effect, but also make the machine due to prolonged uninterrupted operation, increasing the use of the possibility of failure. And will make a impression of power consumption and lack of power to people.