Dynamic filtering apparatus

Abstract

The invention discloses a dynamic filtering apparatus. The apparatus is characterized in that: on the flow path of oil fume, an intercepting assembly for filtering a first particulate matter, a cutting assembly for filtering a second particulate matter, and a filtering assembly for filtering a third particulate matter are arranged in sequence from the upstream to the downstream, the three assemblies are composited into one body driven by the same power mechanism, and the particle sizes of the first particulate matter, the second particulate matter and the third particulate matter are graduallyreduced. Compared with the prior art, the filtering apparatus has the advantages that: through the three-layer dynamic combination of intercepting, cutting and filtering, the composite filtering andgrading purification method can be adopted according to the size distribution of the particle size range, and thereby the intercepting area, cutting speed and contact area are increased, and the filtration in whole particle size range is realized. The presence of the previous stage increases the efficiency and service life of the latter stage, and the airflow field after passing through the assemblies is ensured to be uniform, so that the flow loss is reduced, and the overall filtering apparatus has a low wind resistance.

Description

technical field [0001] The invention relates to an oil fume purification device, in particular to a dynamic filter device. Background technique [0002] Due to the characteristic of fierce fire and stir-fry unique to Chinese cooking, the amount of oil fume is very large, and the particle size range of the oil fume particles is very wide, ranging from a few microns to tens of microns. For residential cooking, long-term use will cause a large amount of smoke to accumulate inside the range hood. Oil stains, especially on the surface of the volute and impeller of the fan system, have accumulated a large amount of oil stains, which makes the performance drop and the effect of oil fume absorption is poor. For catering units, the oil fume with large particle size will naturally settle and adsorb on the surface of the flue, which is likely to cause fire and other hazards to people. And property safety, small particle size particles are excluded outside, affecting the health of surro...

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Problems solved by technology

[0002] Due to the characteristic of fierce fire and stir-fry unique to Chinese cooking, the amount of oil fume is very large, and the particle size range of the oil fume particles is very wide, ranging from a few microns to tens of microns. For residential cooking, long-term use will cause a large amount of smoke to accumulate inside the range hood. Oil stains, especially on the surface of the volute and impeller of the fan system, have accumulated a large amount of oil stains, which makes the performance drop and the effect of oil fume absorption is poor. For catering units, the oil fume with large particle size will naturally settle and adsorb on the surface of the flue, which is likely to cause fire and other hazards to people. and property safety, small particle size particles are excluded outside, affecting the health of surrounding residents and the atmospheric environment

[0003] At present, the filtration of oil fume particles is mainly through static physical filtration means such as metal mesh, which has poor filtering effect, and the effect is negligible for the airflow with too fast wind speed, or through the centrifugal dynamic separation of the main fan, but for small particles There is still no way to solve the problem of using pneumatic methods to open and close the smoke baffle, which has the following disadvantages: the power device requires an air source, the leakage of the pipeline will generate noise, the control accuracy of the movement stroke is not high, and the closed position positioning is not accurate , resulting in backflow of oil fume, which requires limit switches and other devices to assist, the structure is complex and the cost is high

However, the single-layer network disk structure is difficult to filter particles in the full particle size range

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