The fluorine-water heat exchanger inside the main unit of the water system air conditioner plays the role of heat exchange with the secondary refrigerant. There are generally three types of heat exchangers: A-casing heat exchanger; B-shell and tube heat exchanger, and C-plate heat exchanger. A and B are generally used in large units, which has the advantages of low pressure loss, low water quality requirements, and is not easy to block. C is generally used on small units, which has the advantages of small size and high efficiency, but it also has high requirements for water quality. The host of the water system must have a heat exchanger, not a plate type but also one of other forms.
The household central air conditioning water system uses a small heating boiler for auxiliary heating, and a plate heat exchanger is also connected in series before the air conditioning host behind the circulating water pump on the main pipeline. This is used for heat exchange between the air conditioning system water and boiler heating water.In winter, the boiler temperature must be set. The furnace will burn water to reach the set temperature. The heating circulation pump will start to work, and the water will be output to the heat exchanger to circulate. The return water on the main pipe of the air conditioning system will be heated. If the heat exchanger is canceled, the heating furnace must be connected in parallel with the main pipe. When used in winter, the circulation pump of the main system and the heating circulation pump of the boiler subsystem will grab the water, resulting in insufficient heating water flow of the boiler and the boiler cannot play the role of heating.