Year1
- 型号：
- 齐全
- 规格：
- 齐全
- 材质：
- 镀锌板
Key points for selecting smoke exhaust fans
The main control parameters for selecting smoke exhaust fans are working temperature, air volume, full pressure, efficiency, noise, motor power, speed, and shaft power.
The smoke exhaust fan should be able to operate normally for a long time under the condition that the medium temperature is not higher than ℃.
The smoke exhaust fan should ensure that it can work continuously when the temperature of the conveying medium is at ℃, and can still operate normally when the temperature of the medium is cooled to the ambient temperature.
At the rated speed, in the working area, the measured pressure curve of the fan and the curve given in the instruction manual should meet the following requirements
Under the specified flow rate, the axial flow smoke exhaust fan corresponds to The pressure value deviation is.
Under the specified flow rate, the corresponding pressure value deviation of the centrifugal smoke exhaust fan is.
The specific sound level noise limit of the smoke exhaust fan at the operating point given in the instruction manual should comply with the regulations of /.
The smoke exhaust fan can be an ordinary steel centrifugal fan or a special smoke exhaust axial flow fan. The specifications of the smoke exhaust fan are in accordance with the "Fire Protection Code for Design of High-Rise Civil Buildings". The minimum air volume of the smoke exhaust fan is /, and the maximum air volume should not exceed /, which refers to the maximum air volume of a smoke exhaust zone.
The air volume of the smoke exhaust fan should be increased by a margin of not less than ~ according to the required air volume value.
The wind pressure value of the smoke-proof pressurized ventilator should be calculated according to the most unfavorable loop of the smoke exhaust system, and the residual pressure value in the smoke-proof stairwell should be guaranteed ~. Front room shared front room fire elevator front room refuge floor and other internal residual pressure value ~.
Fire smoke exhaust fans should comply with the current standards/"Technical Conditions for Fire Smoke Exhaust Fans".
The fan of the smoke exhaust system should be set up separately. The location of the smoke exhaust fan should be on the same floor or above the smoke exhaust area.
Test method
The impeller trim balance correction is carried out on a dynamic balancing machine according to the regulations.
The overspeed test of the impeller shall be carried out in accordance with the regulations.
The mechanical operation test of the fire smoke exhaust fan is operated continuously at Gong Shuren speed. After the bearing temperature stabilizes, the bearing lift and vibration are measured. The temperature shall not rise higher than the degree, and the vibration test and its value shall comply with the relevant regulations.
Aerodynamic performance test The aerodynamic performance test of the fire smoke exhaust fan shall be carried out in accordance with the regulations of +.
The acoustic test noise measurement method shall be carried out in accordance with the provisions of /. Noise limits should comply with regulations.
The high temperature resistance test is carried out according to regulations. High field crystal performance is required to meet the requirements.
Installation and Maintenance
The kitchen fan is an indispensable key equipment in the kitchen. It is recommended not to install it in the ceiling but to install it on the floor or exterior wall of the machine room and other places that are easy to maintain.
Kitchen fans work in high temperature and humid oil fume gas for a long time. Regular maintenance is indispensable work.
Point of failure
The impeller is stained with oil, causing the blade radian angle to deform, and the air volume and full pressure parameters are significantly reduced, failing to meet the smoke exhaust requirements.
Oil stains on the impeller cause the impeller to lose balance, increase vibration and damage the bearings.
In harsh environments, parts can easily corrode and damage the fan.
New Fan
Developing new technologies to improve efficiency, reduce energy consumption, facilitate cleaning and maintenance, and increase oil fume purification functions are the development directions of new kitchen fans.
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