(1) Central air-conditioning system: The central air-conditioning system sets all kinds of air-handling equipment and fans in a special machine room to centrally treat the air, and then the air supply system sends the treated air to all air-conditioned rooms.
(2) Semi-centralized air conditioning system: In addition to the centralized air treatment room, each air conditioning room has secondary treatment equipment to further supplement the air from the centralized air treatment room.
(3) Fully-distributed air conditioning system: a local air conditioning method in which air handling equipment, fans, automatic control systems and cold and heat sources are all assembled and placed directly in an air-conditioned room to treat air locally.
Second, according to the burden of indoor load medium classification:
(1) All-air system: an air-conditioning system in which all heat and humidity loads in an air-conditioned room are borne by the treated air.
(2) All-water system: an air-conditioning system in which all the heat and humidity loads in an air-conditioned room are borne by water as a cold and hot medium.
(3) Air-water system: an air-conditioning system in which the heat and humidity load of an air-conditioned room is shared by the treated air and water.
(4) Refrigerant direct evaporation system: This is an air conditioning system that directly places the evaporator of the refrigeration system indoors to absorb the heat and humidity load of the room.
Third, according to the different categories of service objects: comfort air conditioning and process air conditioning. Comfortable air conditioners are usually used in homes or public places; Process air conditioning is usually used in factories, laboratories and other places with special requirements for air.
As shown in the figure, it is a brand-new air conditioning unit, which belongs to centralized air conditioning system. Its working principle is: outdoor fresh air enters the air treatment room through the fresh air inlet, and the dust in the air conditioner is removed by the filter, then treated by the surface cooler, heater and other equipment to make the air reach the designed temperature and humidity, and then sent to the muffler by the blower through the air volume control system to reduce the noise, and then sent to the air-conditioned room from the air outlet through the air volume adjustment device in each room, absorbing the residual heat and humidity in the room, and then discharged from the air return outlet through the air duct.