Composite membrane filter material structure and window type draught fan system

Abstract

The invention discloses a composite membrane filter material structure and a window type draught fan system. The composite membrane filter material structure comprises a framework material and an eFTFE membrane compounded on the framework material. The window type draught fan system comprises a shell, a filter assembly and a draught fan. The filter assembly and the draught fan are arranged in the shell, and need-to-be-purified air sequentially passes through the filter assembly and the draught fan from the outside of a room and then enters the room. The filter assembly comprises a crude filter material structure and the composite membrane filter material structure. By the adoption of an efficient nanometer membrane filtration technology, the outdoor air is turned into fresh air, the fresh air is slowly introduced into windows, and the indoor air is clean while the content of carbon dioxide is not increased. Moreover, the 4MTMePTFE membrane serves as the core filter material, the defects that an existing filter material is greatly affected by the environment, needs to be continually changed and poor in one-time interception effect can be completely overcome, the composite membrane filter material structure can be unaffected by environmental conditions and used for a long term, and the efficiency of one-time interception of PM2.5 particles can reach 99% or above.

Description

technical field [0001] The invention relates to a composite membrane filter material structure and a window fan system. Background technique [0002] The fresh air systems in the existing market are all developed on the basis of indoor purifiers. The air inlet of the indoor purifier is changed from indoor to outdoor, and there is no filter material or filter technology for filtering particulate matter. Variety. [0003] Indoor purifiers and existing fresh air systems, the core filter materials used are all melt-blown electrostatic electret materials called HEPA. Because the pore size of this type of material is larger than the diameter of fine particles such as PM2.5 and PM10, Therefore, it cannot physically intercept these fine particles, and its function of intercepting fine particles is realized by relying on the static electricity at the root of its fibers to absorb the particles passing through the fiber gaps. [0004] The effect of static electricity is closely relat...

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Problems solved by technology

[0005] The temperature difference between morning and evening is large in northern my country, and condensation is easy to occur in autumn and winter; the weather in the south is humid, and the air intake part of the fresh air machine must be in contact with the outdoor air, so the filter material of the existing fresh air machine must be replaced frequently, and the shortest time is used. The filter element needs to be replaced after one week, which is an unacceptable cost for most users

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