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What are the characteristics of an electronic clean room?


有什么特点: What are the characteristics of the electronic clean room :

For large-particle dust mainly dominated by inertial mechanism, according to the traditional theory, after the wind speed is reduced, the probability of the dust colliding with the fiber will be reduced, and the filtration efficiency will be reduced accordingly. However, in practice, this effect is not obvious, because the wind speed is smaller, the fiber's rebound force to the dust is also smaller, and the dust is more likely to be stuck.

The higher the wind speed, the greater the resistance. If the life of the filter is based on the final resistance and the wind speed is high, the life of the filter will be short. It is difficult for general users to actually observe the effect of wind speed on filtration efficiency, but it is much easier to observe the effect of wind speed on drag.

For high-efficiency filters, the velocity of air passing through the filter material is generally 0.01 to 0.04m / s. Within this range, the resistance of the filter is proportional to the amount of filtering air. 使用中的实际风量是500m3/h,它的初阻力可降为125Pa。 For example, a 484 × 484 × 220mm high-efficiency filter has an initial resistance of 250Pa at a rated air volume of 1000m3 / h. If the actual air volume in a clean room is 500m3 / h, its initial resistance can be reduced to 125Pa. For a general ventilation filter in an air-conditioning box, the velocity of air passing through the filter material is in the range of 0.13 to 1.0 m / s, and the resistance and air volume are no longer a linear relationship, but an upward arc, the air volume is increased by 30%, and the resistance May increase by 50%. If the filter resistance is a very important parameter for you, you need to ask the filter supplier for the resistance curve.

The diffusion effect (Brownian motion) of small-sized particles is obvious, the wind speed is low, the air stays in the filter material for a longer time, and the dust has more opportunities to hit the obstacle, so the filtration efficiency is high. 对于高效过滤器,风速减少一半,粉尘的透过率会降低近一个数量级(效率数值增加一个9),风速增加一倍,透过率会增加一个数量级(效率降低一个9)。 Experience shows that for high-efficiency filters in dust-free workshops , the wind speed is reduced by half, and the dust transmission rate is reduced by nearly an order of magnitude (the efficiency value is increased by a factor of 9). ).

Related links: Dongguan air-conditioning purification project, Dongguan dust-free purification equipment, Changan central air-conditioning project, low-voltage power distribution project, Dongguan purification ventilation project, Dongguan dust-free purification project, hydropower installation project, Dongguan 100,000-level dust-free workshop, Dongguan City Power Xiang Air Conditioning Purification Engineering Co., Ltd.

Article source: http://jimesale.com Tan Yuming 13751461639


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