The fan coil units we touch at ordinary times mainly include horizontal concealed fan coil units, horizontal open fan coil units, vertical open fan coil units and vertical concealed fan coil units. As for other types of coil units, these types of coil units are basically evolved or slim. Therefore, we analyze the structure of fan coil units based on these types of coil units:
(I) condensate tray.
The function of the water receiving tray is to collect the condensed water of the fan coil and connect the condensed water pipe to discharge the condensed water. When the coil cools and dehumidifies the air, the condensed water will drip in the drip tray (also known as the water receiving tray, water collecting tray) and drain through the drain port.
(II) coil.
The cold (hot) medium water in the coil is supplied by the machine room. The switch is operated to open the two-way solenoid valve. The cold (hot) medium water flows through the coil, and after heat exchange, the cold or hot air is sucked out.
(III) motor.
There are two types of fan coil motors: double-shaft motors and single-cycle motors, three-speed conversion and start-stop, red line connected to high speed, blue line connected to medium speed, black line connected to low speed, and there are several other ways of motor based on current. Fan coil is also the primary component that affects the life of fan coil.
(IV) air conditioning fan.
Air conditioning fan air conditioning fan is mainly composed of casing, impeller and air inlet.
Chassis: all use galvanized steel bite manufacturing, or excellent cold-rolled plate bite manufacturing, its shape lines smooth, heat-resistant, moisture-resistant, durable.
Impeller: forward multi-wing arc-shaped blades are riveted with the front disc and the middle disc. After strict dynamic and static balance proofreading, it ensures stable work, high efficiency and low noise.

1. Problem: The suspended ceiling is often soaked with water. In severe cases, the mineral wool suspended ceiling is soaked thoroughly.
Reason: The cold water pipe is not well insulated, and the insulation material is not tightly attached to the pipe. As a result, there are small holes or loose places in the pipe insulation. The air enters and touches the pipe wall to produce condensed water. The more water is accumulated, the more it does not necessarily flow out at any position, wetting the ceiling, seriously soaking the mineral wool board ceiling, even collapsing the ceiling, and wasting more cold energy.
Solution:.
In addition to the construction of attention, in the design of the selection of insulation materials should emphasize the practice, the current rubber or polyurethane foam (self-extinguishing) tile with glue on the pipe effect is good, or with fan coil polyurethane foam directly.

Problem 2: The horizontal concealed fan coil in the hotel overflows the condensed water on the ceiling of the room, drenched the ceiling and damages the decoration, thus greatly reducing the air conditioning load and preventing the refrigerator from operating normally.
Reasons: 1) The heat preservation of cold water pipes, valves and fresh air pipes are all foamed plastics, and the gaps related to the pipe wall are not well wrapped, resulting in a large amount of condensed water flowing along the cold water pipes, making the heat preservation layer ineffective.
2) The slope of the condensate pipe is too small, or even no slope, causing the condensate in the water collection tray to overflow and damage the ceiling decoration.
3) Stop the fan coil, the cold water temperature is lower and lower, reaching 5~7 ℃, and it is often forced to stop because the load is too small.
Solution:.
1. Re-insulation of cold water pipes, valves and fresh air pipes, and replace them with foamed polyurethane or rubber to prevent condensed water in pipes.
2. Adjust the gradient and slope direction of the condensate pipe to make the water in the water collecting tray drain away smoothly.

fan coil installation points:
(1) The drain pipe of condensate should be set up nearby for drainage, which can shorten the distance of horizontal drainage and reduce the danger of water collection and dripping fan coil due to insufficient slope of the drain pipe. The pipe diameter of the drain pipe drawn from each fan coil should be DN20, while the size of the drain riser and the main pipe should be larger.
(2) A water collecting plate shall be made under the manual and electric water valves on the connecting pipes of the fan coil unit and the cold and hot water pipes. The water collecting plate can be connected with the water collecting plate of the fan coil unit, or the manufacturer can be required to lengthen the original water collecting plate to ensure that the condensed water at the joints such as valves can be discharged along the water collecting plate, and external heat preservation of the machine shall be done to prevent secondary condensed water.
(3) There should be an inspection opening, its location and size, and the specific project should be closely coordinated with the building, and the settlement should be negotiated. Attention should be paid to the convenience of disassembly and assembly of the ceiling where the fan coil is installed, because this is necessary for the use and maintenance of the fan coil.
(4) The return air outlet should be equipped with a filter screen to protect the fan disk from being clean, otherwise the heat exchange efficiency is low and fast.
(5) When the fan coil is connected to the air duct in the front section, high static pressure fan coil equipment should be selected.
(6) The installation position of the electric valve should be indicated so as not to be reversed. At present, the electric valve of many projects should be reversed. It is necessary to remind not to connect the "0" line incorrectly when connecting the power supply. If it is connected incorrectly, the motor will burn out.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong Province, the hometown of glass fiber reinforced plastic in China. The company has three-level qualification for construction mechanical and electrical installation engineering, three-level qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, an axial fan invention patent, a fan utility model patent, EIA, three at the same time waiting for complete procedures