Central air conditioning end equipment:
1. Combined air conditioning unit
Combined air conditioning unit is the end equipment of the central air conditioning, itself does not have a cooling and heating source, the refrigerant is water, the heat medium is water or steam, generally used in the whole air treatment system. Combined air conditioning consists of multiple functional segments, which are assembled together by flexibly selecting the corresponding functional segments according to specific cooling, heating, humidification, air filtration, air supply, and sound deadening needs, so as to satisfy the different requirements of customers for air temperature, humidity, cleanliness, flow rate, and freshness.
2. Fresh air unit
The fresh air unit can deal with both fresh air and mixed air, with sufficient residual pressure, and speed control can be added to change the air volume to meet the requirements of cooling, dehumidifying and warming under various climatic conditions.
(1) The principle of operation of the fresh air unit from the outdoor introduction of fresh air, after filtration, heat transfer, humidification and other treatment processes, in order to achieve the purpose of summer refrigeration, heating in winter, and improve indoor air quality.
(2) The basic composition of the fresh air unit consists of air inlet, motor, fan, filter, heat exchanger, humidifier, air valve, air outlet and other components.
(3) Classification According to the construction and installation can be divided into: vertical fresh air unit and horizontal fresh air unit two. According to the energy recovery method can be divided into: rotor full heat recovery type new wind machine and static energy recovery new wind machine.
3. Fan coil
Fan coil air-conditioning system in the centralized air-conditioning system belongs to a semi-centralized air-conditioning system, and set up as the end of the system. It is mainly composed of low-noise motor, coil (heat exchanger), condensate tray, air filter, air inlet, return air inlet, controller and so on. The fan sends indoor or outdoor and mixed indoor/outdoor air to the indoor through the table cooler for cooling or heating to lower or raise the indoor air temperature to meet people's comfort requirements. The cold (hot) media water in the coil is supplied centrally from the plant room. Fan coil is the ideal end device of centralized air-conditioning system with the functions of cooling, heating and dehumidifying. It is matched with chillers as well as boilers for use in heating and cooling systems. Fan coil air-conditioning system with its flexible layout, convenient adjustment, saving return air ducts, lower working pressure and high standardization and other outstanding advantages. At present, it has been widely used in hotels, office buildings, commercial buildings, apartments, hospitals and other high-level multi-room central air conditioning system.