The central air conditioning is briefly

Factory central air conditioning host and terminal system. According to the burden of medium used in the indoor thermal and moisture load can be divided into full air system, water system, air - The water system, cooling system. According to air handling equipment concentration can be divided into centralized and centralized. According to the treated air source can be divided into closed, once-through, hybrid ( Primary return air secondary return air) 。 Main equipment have air conditioning host ( Hot and cold source) The wind cabinet fan coil and so on. Working principle: air conditioning refrigeration, air conditioning system built-in - a heat medium - Refrigerant ( Refrigerant) By the indoor machine after, refrigerant through the expansion valve throttle ( The evaporator) Internal evaporation gasification, indoor machine fan will be blowing cold air indoor, absorb the heat energy in indoor air, refrigerant through the pipe back to the compressor suction side, by the compression of compressor, raised the temperature of cold media, through the (outdoor Condenser) The refrigerant from vaporizing state into a liquid state, in the process of transformation, release a lot of heat, through the fan will be outdoor heat discharge, through the cycle of circulation, achieve the goal of refrigeration. By the transformation of the electric four-way valve, air conditioning heating: system will go through compressor compression of high temperature and high pressure liquid directly into the indoor machine condenser ( Indoor machine from cooling to heating, the function from the evaporator to condenser) And release a lot of heat by the fan is released into the indoor, absorb indoor air; After expansion valve throttling the refrigerant system through the evaporator by the liquid into a gas, outdoor absorbs in the indoor machine of cold air through the evaporator and outdoor fan to the cold air outside, refrigerant through the pipe back to the compressor suction side. Through the cycle of circulation, achieve the purpose of heating.

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