Nowadays, central air conditioners have a self-cleaning function, so they can clean the stains in the air conditioner by themselves.
The central air conditioning system consists of one or more cold and heat source systems and multiple air conditioning systems. This system is different from traditional refrigerant air conditioners (such as single units, VRV) that centrally process air to achieve Comfort requirements. The principle of liquid gasification refrigeration is used to provide the required cooling capacity for the air conditioning system to offset the heat load of the indoor environment; the heating system provides the required heat for the air conditioning system to offset the cooling and heating load of the indoor environment.
The refrigeration system is a crucial part of the central air-conditioning system. Its type, operation mode, structural form, etc. directly affect the economy, efficiency, and rationality of the central air-conditioning system in operation.
Water-cooled central air conditioners include four major components: compressor, condenser, throttling device, and evaporator. The refrigerant circulates through the above four major components in turn. The refrigerant (refrigerant) coming out of the compressor is of high temperature and high pressure. The gas flows through the condenser to cool down and reduce the pressure. The condenser brings the heat to the cooling tower through the cooling water system and discharges it. The refrigerant continues to flow through the throttling device and becomes a low-temperature and low-pressure liquid. It flows through the evaporator, absorbs heat, and is then compressed. There are chilled water circulation systems connected at both ends of the evaporator. The heat absorbed by the refrigerant reduces the temperature of the chilled water, causing the low-temperature water to flow to the user end, and then passes through the fan coil for heat exchange and blows out the cold air.
The working principle of the wind system
The fresh air transmission method adopts the displacement method, instead of the internal circulation principle of air-conditioning gas and the unhealthy practice of mixing old and new gases. The fresh outdoor air passes through the negative pressure method. It will be automatically sucked into the room. When it enters the room through the fresh air outlet installed on the window of the bedroom, hall or living room, it will automatically remove dust and filter. At the same time, the corresponding indoor pipelines are connected to the exhaust vents in several functional rooms. The circulation system formed will take away the indoor exhaust gas and concentrate it on the exhaust vents to "exhale", and the exhausted exhaust gas will no longer be recycled. Good circulation of old and new wind shapes.
The working principle of the coil system
The working principle of the fan coil air conditioning system is to continuously circulate the indoor air with the help of the fan coil unit so that it can be cooled or heated through the coil , to maintain the required temperature and certain relative humidity in the room. The cold or hot water used by the coil is supplied by a centralized cold source and heat source. At the same time, the fresh air after centralized treatment in the fresh air air conditioning machine room is sent to each air-conditioned room through special fresh air ducts to meet the hygienic requirements of the air-conditioned room.
Compared with the centralized system, the fan coil air conditioning system does not have large air ducts, only water pipes and smaller fresh air ducts. It has the advantages of easy layout and installation, small building space occupation, and good individual adjustment. It is widely used in comfort air conditioners where temperature and humidity accuracy requirements are not high, the number of rooms is large, the rooms are small, and individual control is required.