Coils are only used as comfort air conditioners and should not be used for special occasions. 4. Do not install the fan coil unit in an area with corrosive gas. Coil Development Trends Coils in China have undergone several different changes. In the early stage, the understanding of the coil was mainly based on meeting the air volume requirements. I think that as long as the air volume can meet the requirements, it must be a good coil. Under the guidance of this concept, the main feature of the coil units produced at that time was that the air volume generally exceeded the standard, which brought a lot of noise and energy consumption. The unit power cooling capacity of the coil unit produced at that time was only about 40W. Because of the loud noise, the situation at the time was that people had to endure the annoying noise while enjoying the cool breeze brought by the air conditioner. In order to solve the above problems, the country began to revise the product standards of coils. my country's coil manufacturing industry has developed rapidly, and the annual output has increased from several thousand units in the early 1980s to hundreds of thousands of units. However, the product performance has been hovering at the level of the 1970s abroad for a long time.

The housing of the concealed unit is usually made of galvanized steel sheet. According to the national standard "Fan Coil Unit", the wall-mounted fan coil unit can be divided into two categories: low static pressure and high static pressure according to the external static pressure. Under the rated air volume of the fan coil unit, the static pressure at the outlet of the low-pressure unit is 0 or 12Pa, and the static pressure at the outlet of the unit with air outlet and filter is 0; for the unit without air outlet and filter, the outlet static pressure is 12Pa; under the rated air volume, the outlet of the high-pressure unit is The static pressure is not less than 30Pa. Select and install requirements. Coils should be installed or concealed according to the specific conditions of the room and decoration requirements, and the installation location and form should be determined. Vertical units are generally placed under the window sills of the exterior walls; horizontal units are suspended in the upper part of the room; wall-mounted units are suspended above the walls; reliable walls of column units are placed on the ground or in partition walls; cassette units are embedded in the ceiling. The exposed unit should be placed directly indoors without decoration, but the unit whose appearance color is coordinated with the color of the room should be selected; the concealed unit should be provided with air supply and return vents that are in harmony with the architectural decoration, and an air outlet filter should be set at the return air vent. There should also be movable or openable maintenance openings in the building decoration, so as to facilitate the disassembly and maintenance of the fan and motor of the unit and the cleaning of the air heat exchanger.