Thermophoretic air purifying device and method

Abstract

The invention discloses a thermophoretic air purifying device and a thermophoretic air purifying method, and belongs to the technical field of air purification. In a principle of a thermophoretic technology, a stable temperature gradient is artificially created, so that particles in air in a temperature field are enabled to change the motion tracks under the action of a thermophoretic force, are attached to a low-temperature surface and are removed. The thermophoretic air purifying device comprises a shell, a thermophoretic dust tube and a blower, wherein through forced ventilation or thermal pressure ventilation of the blower, air flows through the thermophoretic dust tube and is filtered. Through theoretical calculation, software simulation and real object production test, the thermophoretic air purifying device is proved to have the characteristics of greenness, environment friendliness, no secondary pollution, low resistance, high efficiency of an air filtering device and the like and has a very good filtering effect on fine particles; the average one-pass efficiency of PM 2.5 is nearly 40%, and the highest one-pass efficiency can be as high as 60%; and the thermophoretic air purifying device is simple in structure, and thermophoretic dust tube is convenient to detach for cleaning, so that the maintenance cost is low.

Description

technical field [0001] The invention relates to an air cleaning method and device, in particular to an air cleaning method and device based on the thermophoresis principle. Background technique [0002] Our country is suffering from the serious threat of PM2.5. Due to the small particle size of PM2.5 pollutants, the air purifiers on the market today do not have a good effect on PM2.5. In this context, a new type of Air filters targeted for PM2.5 are imminent. [0003] PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 microns in the atmosphere, also known as particulate matter that can enter the lungs. PM2.5 has a small particle size, is rich in a large amount of toxic and harmful substances, and has a long residence time in the atmosphere and a long transportation distance, so it has a greater impact on human health and the quality of the atmospheric environment. The indoor PM2.5 concentration can be as high as 2 / 3 of the outdoor one, and people ...

AI Technical Summary

Problems solved by technology

[0004] The existing air purification methods on the market mainly include fiber filtration and electrostatic dust removal, but both methods have obvious disadvantages

The resistance of the fiber filtration method is high, which will cause a certain amount of noise. At the same time, in order to ensure a high filtration efficiency, the fiber filter needs to be replaced regularly, and the price of the filter screen is very high, which makes the fiber filter have a high cost.

The main disadvantage of the electrostatic dust removal method is that it will generate ozone during the work process, causing secondary pollution

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