When selecting the fume purifier, the air volume, air pressure, power and speed of the equipment will be considered. When the fan selection is unreasonable, it will not only affect the normal operation of the equipment, but also reduce the purification effect of the fume purifier. Therefore, before type selection, type selection calculation shall be carried out according to actual working conditions.
The air volume of the fume purifier is a very important parameter, which directly affects the purification effect of the equipment. Therefore, when selecting the type, we must pay attention to the following points:
What is the relationship between air volume and fan speed?
The rotational speed of the fan has a great relationship with the air volume, which is also the key to selection. Generally speaking, the greater the air volume, the greater the fan speed. If the fan speed is constant, the air volume will increase with the increase of the fan speed; If the fan speed increases, the air volume will decrease.
For example, the air volume is also 10m/s. If a device wants to reach the air volume of more than 5m/s, it needs to increase the fan speed. Therefore, if the fan speed is too low, even if the wind speed is increased, the air volume generated by the equipment will not increase.
In addition, when selecting a fume purifier, Z should choose a dual speed or multi speed fan. This can not only achieve the required air volume, but also reduce noise and vibration. Of course, you should choose the brand and quality of the fan itself.
Air volume calculation
1. Calculation method of air volume:
Select the appropriate fan according to the fan characteristic curve. First, select the appropriate model according to the characteristic curve of the fan, and then determine the number and model of the fan according to the actual size of the fume purification equipment.
2. Calculate the air volume of lampblack purification equipment.
When the volume of the fume purifier is small and only tens of cubic meters, the following formula can be used for calculation: air volume x (A/A)=air volume * wind speed * (1+f); When the equipment size of fume purifier is large, the selection of fan is very important. Generally, the air volume of the fume purifier is 1.5-2 times, and the air pressure is 20-25 pa.

If the air volume is too large or too small, it shall be calculated according to the actual situation. For example, small catering enterprises have only one or two kitchens and can use two fans in parallel. If they are large catering enterprises, they should use 3-4 fans in parallel.
Will the air volume affect the purification effect of the equipment?
Of course, the air volume is an important factor affecting the purification effect of the equipment. The air volume of the fume purifier shall be determined according to the specific purification process. If the equipment produces a large amount of smoke in the process of processing, a larger air volume should be selected.
When the equipment reaches a certain air volume, the air volume will gradually decrease, so it needs to be adjusted. If the fume purifier is used to treat the exhaust gas with larger particles and smaller particles, the larger air volume should be selected, but care should be taken not to let the excessive air volume exceed the capacity of the equipment. If it is to treat some high concentration waste gas, it is necessary to consider adjusting the air volume to an appropriate position.
In addition, the fan should be cleaned and maintained regularly during operation, otherwise the purification effect and service life of the equipment will be affected.