The principle of air conditioner/air conditioner supplying cooling, heating or dehumidification is similar. It uses the refrigerant to evaporate or condense under the action of the compressor, thereby triggering the evaporation or condensation of the surrounding air to achieve changes. The purpose of temperature and humidity. Refrigeration cycle picture reference: bits.wikimedia/skins-1.5/mon/images/magnify-clip Refrigeration cycle diagram: 1) Condensation coil, 2) Expansion valve, 3) Evaporation coil, 4) Compressor in the refrigeration cycle, A heat pump transfers heat from a low-temperature heat source to another higher-temperature heat sink. The heat will naturally flow in the opposite direction. This is the most common type of air conditioner. The operating principle of a refrigerator is very similar to this, transferring heat from inside the refrigerator to the air outside the refrigerator. This cycle uses the universal gas law (universal gas law) PV = nRT, P represents the gas pressure, V represents the volume, and R represents the universal gas constant, T represents the temperature, and n is the number of moles of gas (1 mol = 6.022 ×1023 particles). The most common refrigeration cycle uses an electric motor to drive a compressor. In cars, the compressor is driven by the engine's crankshaft through a pulley, and both use electric motors to circulate air. Because evaporation occurs when heat is absorbed, and condensation occurs when heat is released, air conditioners use a compressor to create a pressure change between two compartments and a pump to move the refrigerant. The refrigerant will be pumped into the cooler compartment (evaporator coil), and the low pressure and low temperature cause the refrigerant to evaporate into vapor and absorb heat. In another compartment (condenser), the refrigerant vapor is compressed and passes through another heat exchange coil, where it condenses into a liquid and releases the heat previously absorbed in the cold compartment. [edit] Humidity Refrigeration air-conditioning equipment often reduces the humidity of the treated air. The cooler (below the dew point) evaporator coil condenses the water vapor in the treated air. Just as a cold drink condenses the water vapor in the air in the container, the water will flow away through the sewage pipe, which will remove the freezer space. water vapor in the air and reduce the relative humidity. Because the human body naturally lowers its body temperature through evaporation of sweat, drier air increases human comfort. Comfort air-conditioning systems are usually designed to discharge air with a relative humidity of between 40% and 60%. In food retailer properties, large open freezers serve as highly efficient air dehumidifiers. Some air-conditioning equipment only dries the air without lowering its temperature. Its operation is similar to that of general air-conditioning equipment, except that a heat exchanger is added between the air suction inlet and the discharge outlet, and a convection fan is added. In humid climates, it can achieve a level of comfort similar to that of an air conditioner, but only consumes about 1/3 of the electricity. This type of air conditioner is also suitable for people who feel uncomfortable with colder air. [edit] Refrigerant (Freon, chlorofluoromethane) is the brand name for a series of chlorofluorocarbon chemicals produced by DuPont Chemical and other companies. These refrigerants are widely used because of their high stability and safety. However, there is evidence that these refrigerants containing chlorine will rise to the upper atmosphere when they are released into the atmosphere. Their chemical functions are not yet clear, but it is believed that CFCs are decomposed by ultraviolet irradiation in the stratosphere and release chlorine atoms. Chlorine atoms become a catalyst for the decomposition of ozone, causing serious damage to the ozone layer that protects the earth from ultraviolet rays. The chlorine atom continues to act as a catalyst until it forms a stable state with other particles. CFC refrigerants that are rare but have been banned include R-11 and R-12. Refrigerants that are gradually being banned from production include HCFC (R-22, commonly used in homes) and HFC (R-134a, used in automobiles), which have completely replaced CFCs. According to the Montreal Protocol, HCFCs have been gradually phased out and replaced by hydrofluorocarbons (HFCs) such as R-410A

R404, which does not contain chloride. In addition to the use of chemical refrigerants or chemical mixed refrigerants, the natural refrigerant (refrigerant) ammonia is traditionally used to make ice cubes. However, due to the influence of the physical properties of ammonia (such as flammability, toxicity, odor and corrosiveness), It is not suitable for use in traditional household air conditioning environments. It is mostly used on fishing boats or industrial ice making. Another developing natural refrigerant (refrigerant) is carbon dioxide.

Because of its supercritical compression characteristics, it has excellent advantages when used in hot water heat pumps.

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