Classification and structure of fan coil units in dust-free purification workshops
Classification and structure of fan coil units in dust-free purification workshops
1. Classification of fan coil units in dust-free purification workshops
In order to meet the application requirements of different occasions, the types of fan coil units include horizontal concealed (with return air box) fan coil, horizontal exposed fan coil, vertical concealed fan coil, vertical exposed fan Coils, cassettes...
Text label: dust-free purification pharmaceutical cleanroom, purification workshop fan coil, fan coil classification
Classification and structure of fan coil units in dust-free purification workshops
1. Classification of fan coil units in dust-free purification workshops
In order to meet the application requirements of different occasions, the types of fan coil units include horizontal concealed (with return air box) fan coil, horizontal exposed fan coil, vertical concealed fan coil, vertical exposed fan Coils, cassette two-outlet fan coils, cassette four-outlet fan coils and wall-mounted fan coils, etc.
The difference between vertical and horizontal is mainly for concealed fans. The surface-mounted fan coil unit is generally vertical, it is mainly installed under the window sill, and the use is more common. The horizontal concealed fan coil unit is the vertical concealed installation, which is different from the vertical one in structure. Horizontal concealed fan coil units are usually hoisted on the ceiling of the room, and the direction of cold air is top-down.
Exposed installation and concealed installation are divided according to the structure type of the fan coil unit. Exposed installation is to place the fan coil unit in the visible part of the room, and concealed installation is to place the fan coil unit in the invisible part of the room.
2. Structure of fan coil unit in dust-free purification pharmaceutical cleanroom
Fan coil unit is mainly composed of low noise motor, coil and so on. The fan cools or heats the indoor air or outdoor mixed air through the surface cooler and sends it into the room to lower or raise the indoor temperature to meet people's comfort requirements. The cold (hot) medium water in the coil is centrally supplied by the machine room. Zhongjing Global Purification can provide consulting, planning, design, construction, installation and transformation of dust-free workshops, purification workshops, clean workshops and other supporting services.
The fans in a fan coil unit can be single, double or multiple. The motor that drives the fan in the fan coil unit is mainly a single-phase capacitive speed regulating motor. This single-phase motor has three taps, and the measured resistance value between one pair of taps is higher than the resistance value between the other two terminals. A capacitor is connected in parallel between the two terminals with the largest resistance value, and the other terminal (common) ) to the power supply. Then test the resistance between the common end and the connector connected to both ends of the capacitor, and connect the end with the larger resistance to the other end of the power supply. The inversion can be controlled by changing the power line connected to the two ends of the capacitor to the other end through the control circuit.
By changing the input voltage of the motor and changing the speed of the motor, the air volume provided by the fan coil unit is adjusted according to the high, medium and low gears (the air volume of the third gear is generally set at 1:0.75:0.5. of the rated air volume).
The coil in the device is a heat exchanger with 2 to 3 rows of copper tubes and aluminum alloy fins. The chilled water is connected to the cold pipeline of the water system. If hot water needs to be supplied, the coil is connected to The hot water line of the water system is connected. In order to protect the fan and motor, reduce the impact of fouling on the heat exchange effect of the coil and reduce the pollutants in the room air, the air inlet of the fan coil (except the horizontal concealed unit) is equipped with an air inlet that is easy to clean and replace. Filter to retain dust and fibers.
Fan coil units include single-coil units and double-coil units. There is only one coil in the single-coil unit, which is used for both heating and cooling. The heat supply of the single-coil unit is generally 1.5 times the cooling capacity; there are two coils in the double-coil unit, which provide heating and cooling respectively.
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