Medium Efficiency Exhaust Box is a device used to provide indoor air purification.The filter bellows has a built-in supply and exhaust fan to suppress room temperature changes, keep enough fresh air indoors, achieve the purpose of indoor air purification, and ensure indoor air health.
The medium-efficiency filter exhaust fan box is also called the primary and medium-efficiency fan box. It is the air supply and exhaust equipment of the air conditioning system. It can filter the polluted gas in the room and discharge it to the outside. It is used for pressurization and filtering air supply. It is one of the best primary, medium and (high) efficiency filtration air purification devices in the clean room. The medium-efficiency filter exhaust fan box also has the functions of filtering and air supply, easy installation, convenient use, reasonable structure and other advantages. It has a good effect on improving process conditions, improving product quality and yield rate. It is widely used in air purification systems in the pharmaceutical, medical, food, electronics, fine chemicals, precision instruments and other industries and air supply and exhaust of general comfort air conditioning systems.
1.The filter bellows is equipped with professional air filters to pre-treat the fresh air to ensure that the fresh air delivered into the room is clean and dust-free, and can be equipped with high-performance filtering devices according to special requirements for fresh air.
2.The filter bellows product design is compact and reasonable, small in size, low in noise, and easy to install.
3.The filter bellows only need to open an inspection door on one side, and maintenance is simple and convenient.
4.The filter bellows are made of high-quality cold-rolled steel plate sprayed or color steel plate.
5.The filter bellows can be used with the fresh air system to achieve the best effect. Use the filter bellows and fresh air system to ensure the indoor fresh air volume and breathe fresh and clean air. It is a very effective air purification equipment
Key points for selecting medium-efficiency filter exhaust fan box
1. The control parameters for selecting the fan box are air volume, total pressure, efficiency, noise and motor power. There are centrifugal and axial flow types.
2. The fan is equipped with a fan box, which is conducive to noise reduction.
3. When selecting the fan, the leakage loss of the pipeline system, the calculation error, and the negative deviation of the actual air volume and air pressure of the fan should be considered. Generally, the air volume is 1.05~1.1 and the air pressure is 1.10~1.15. Safety factors. However, it is not too large to prevent the fan from operating in the low-efficiency zone for a long time.
4. Pay attention to the matching relationship between the pipe network resistance characteristics and the fan characteristics. In order to ensure the stable operation of the fan, the fan should be operated near its highest efficiency point, and the working point of the fan is located on the right side of the total pressure peak point in the performance curve (that is, the large air volume side, and generally at 80% of the total pressure peak)
1. Basic safety precautions
A. Please do not go to high-speed dust sources and earthquake sources.
B. Please do not wipe the box with volatile oil, thinner, corrosive solvents, etc. to avoid damaging the paint layer or causing discoloration.
C. It is prohibited to use in the following places: low temperature, high temperature, high humidity, condensation, dust, and places with oil smoke and fog.
2. Electrical safety precautions
A. Put the product in place before wiring and connecting the power supply to avoid personal injury.
B. Please confirm whether the rated voltage and frequency of this product are consistent with the parameters of the input power supply to avoid damaging electrical components and causing fire.
3. Operation safety precautions
A. Under normal atmospheric conditions, the insulation resistance value between the power input and end of this product and the casing or exposed conductive parts should be greater than 20M, and the insulation resistance value after humidity test should be greater than 2M.
B. The double doors of the filter bellows are interlocked. Only one door can be opened. Both doors cannot be forcibly opened at the same time, otherwise the double door interlocking system will be damaged.
C. If any abnormality is found during operation, the power supply should be cut off in time and relevant personnel should be notified for inspection and maintenance.
Installation Instructions for Medium Efficiency Filter Exhaust Fan Box
1. The fan should be arranged on the floor or platform as much as possible for maintenance and repair; when the motor power of the centrifugal fan is less than or equal to 75kW, the valve only for starting can be installed. When a high-core boiler induced draft fan is selected for exhausting high-temperature flue gas or air, a valve for starting should be installed to prevent the motor from overloading during cold operation.
2. The fan installation base (foundation) should have sufficient strength, stability and durability, and the vibration of the base should meet the following requirements: 1) The natural frequency of the foundation device shall not be greater than 1/3 of the motor and fan speed; 2) The difference between the vibration speed of the fan when it is running and the vibration speed of the fan when it is stationary must be greater than 3 times.
3. A flexible joint should be installed between the inlet and outlet of the fan and the air duct. The air inlet and outlet ducts and other devices should be supported separately and firmly supported by the foundation or other building components. The casing should not bear the weight of other parts.
4. When the fan is installed on the building components, vibration isolation measures should be taken
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