KR20190143097A - Filter and pre-filter of air cleaning device - Google Patents

Abstract

The present invention relates to a filter and a prefilter for air cleaners. The filter of the present invention is to filter fine dusk in the air and is made of metal.

Description

FILTER AND PRE-FILTER OF AIR CLEANING DEVICE}

The present invention relates to a filter and a prefilter of an air cleaning device.

In recent years, fine dust has increased along with yellow dust. Fine dust is classified into direct emissions directly from factories and automobiles, and indirect emissions from sulfur oxides (SO _x ), nitrogen oxides (NO _x ), and volatile organic compounds (VOCs). Emissions account for about 70%. Long-term exposure to such fine dust may cause problems such as respiratory and vascular diseases. Among the fine dust, especially PM2.5, the particle size is small and difficult to filter, but easier to penetrate into the human body. This is a bigger problem.

Accordingly, at least indoors such as homes and workplaces are equipped with an air cleaner to purify the fine dust in the introduced air (outer air). Conventional air cleaners include an air circulation device to allow indoor air to flow into a housing constituting the exterior, and include an air purification filter and various functional filters in the housing. Thus, the indoor air is purified by removing the dust of the sucked air.

The air purifier filter includes a pre-filter, a deodorizing filter, a HEPA filter, a heavy metal adsorption filter, and various functional filters, which primarily filter external fine dust. Among these, since the conventional pre-filter is not able to filter the dust of less than 200㎛, since the dust is collected in the main filter, hepa filter inside, there is a problem that the life of the main filter, hepa filter is shortened by that much.

On the other hand, the filters applied to the anti-vibration network, the ventilation window also has a problem that the size of the pattern is larger than 0.2mm like the pre-filter of the air purifier, the smaller dust is introduced into the room to lower the air cleanliness.

Therefore, the present invention has been made in order to solve the above problems of the prior art, and aims to increase the replacement cycle of the main filter by collecting the dust contained in the air passing through the pre-filter as much as possible.

In addition, an object of the present invention is to collect the dust of a smaller size than the existing products when the outside air is introduced into the room through the pre-filter to supply clean air.

However, these problems are exemplary, and the scope of the present invention is not limited thereby.

The above object of the present invention is achieved by a filter which filters fine dust in the air, which is made of metal and whose diameter is larger than 0.001 mm and smaller than 0.2 mm.

And the said objective of this invention is achieved by the prefilter of an air cleaning apparatus which further includes the said filter and the frame which supports the filter.

And the said objective of this invention is achieved by the dustproof network further provided with the said filter and the frame which supports the filter.

And the said objective of this invention is achieved by the ventilation window further provided with the said filter and the frame which supports the filter.

According to the present invention configured as described above, the dust contained in the air passing through the pre-filter as much as possible has the effect of increasing the replacement cycle of the main filter.

In addition, according to the present invention, when the outside air is introduced into the room through the pre-filter has the effect of collecting the dust of a smaller size than the existing products to supply clean air.

1 and 2 show the structure and the pre-filter of the conventional air cleaner.
3 and 4 illustrate a conventional prefilter and a prefilter according to an embodiment of the present invention.
5 shows an application example of the filter of the present invention.
6 is a schematic view (a) and an enlarged view (b) of a portion B showing a filter unit according to an embodiment of the present invention.
7 and 8 are schematic diagrams showing a filter according to another embodiment of the present invention.

DETAILED DESCRIPTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention with respect to one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. In the drawings, like reference numerals refer to the same or similar functions throughout the several aspects, and length, area, thickness, and the like may be exaggerated for convenience.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention.

1 and 2 show the structure and the pre-filter of the conventional air cleaner.

Referring to FIGS. 1 and 2, conventional air cleaners include pre-filters, deodorization filters, main filters / HEPA filters, heavy metal adsorption filters, heavy metal adsorption filters, and various functional filters. It includes. Among them, the pre-filter protects the main filter by collecting and collecting relatively large dust among the external fine dusts.

3 and 4 illustrate a conventional prefilter and a prefilter according to an embodiment of the present invention. 5 shows an application example of the filter of the present invention.

Referring to Figure 3, the pattern line width of the existing prefilter is processed to a size of at least 0.2mm. Dirt of less than 200㎛ is collected in the main filter after passing through the pattern without being collected in the filter. Accordingly, since the amount of dust collected in the main filter increases, there is a problem of shortening the life of the main filter. The HEPA filter, which is often used as the main filter, has a lifespan of about six months.

In addition, as shown in Figure 5, even when the filter portion of the pre-filter is applied to the dustproof net, the ventilation window, the pattern size is 0.2mm or more, 0.2mm or less dust is introduced into the room there is a problem that the air cleanliness falls.

Therefore, this invention proposes the filter which reduced the pattern size, the prefilter which applied this filter, a dustproof network, a ventilation window, etc.

Referring to FIG. 4, a micropattern (1/100 to 200 levels of an existing line width) may be formed on a filter base material using optical technology used in semiconductor and LCD manufacturing processes. Accordingly, by collecting the dust contained in the air passing through the pre-filter as much as possible to minimize the dust flowing into the main filter has the advantage that can significantly increase the replacement cycle of the main filter. The prefilter can be used semi-permanently by washing in water or whisking with air.

Hereinafter, the filter will be described in more detail.

6 is a schematic view (a) and an enlarged view (b) of a portion B showing a filter unit according to an embodiment of the present invention.

Referring to FIG. 6, the filter unit 140 may include a frame 141 and a filter 145.

The frame 141 forms an edge of the filter unit 140 and may support the filter 145. The frame 141 may support the filter 145 using a material such as plastic or metal when the filter unit 140 is used as a prefilter, a dustproof network, a ventilation window, or the like. The frame 141 may be further provided with a predetermined shape so as to be inserted into the housing of the air cleaner or the window frame.

Referring to FIG. 5B, which is an enlarged portion B of FIG. 6A, a fine filter hole H is formed in the filter 145 to remove fine dust D in the air passing through the filter hole H. You can filter it. The filter holes H may be formed so as to be arranged in a matrix, and the diameter of the filter holes H is preferably smaller than 0.2 mm, which is a conventional filter hole size. For example, the diameter of the filter hole (H) may be less than 0.001mm and less than 0.2mm. If the filter hole H has a diameter of about several micrometers, fine dust of PM10 and PM2.5 can also be immediately filtered.

On the other hand, although the filter 145 reduced the size of the filter hole H, it is preferable to keep the aperture ratio equivalent to that of the conventional one in view of the efficiency of ventilation. For example, if the filter hole diameter of the existing filter is 250 μm and the width of the mesh portion surrounding one filter hole is 50 μm, the filter 145 of the present invention has a filter hole H diameter of 50 μm and one It is preferable that the width of the mesh portion surrounding the filter hole H is 10 占 퐉 so as to maintain the same aperture ratio. Such filter hole H size and aperture ratio adjustment can be freely performed by using an optical technique used in a semiconductor or LCD manufacturing process, for example, lithography using a photoresist, plating, or the like.

The filter 145 may be made of a metal material such as Cu, SUS, Invar, and Super Invar. In addition, the filter 145 in which the fine filter hole H is formed may be manufactured by gravure printing, electroforming / electroless plating, laser drilling, arc discharge, micro punching, or the like. .

The filters installed in the existing air cleaners are HEPA filters, activated carbon filters, etc., which are mainly composed of fibers, fabrics, resins, and the like, and thus fine dust particles penetrate into the filter and thus cannot be regenerated after a certain period of time. .

On the other hand, since the filter 145 of the present invention is made of a hard metal material, only fine dust particles are filtered at the surface of the filter 145 and cannot penetrate into the filter 145. Thus, the filter 145 can be regenerated and semi-permanently used only by cleaning the fine dust on the surface of the metal filter unit 140. For example, when the filter unit 140 is used as a dustproof network or a ventilation window, fine dusts attached to the outer surface of the filter unit 140 may be periodically cleaned only by weather conditions such as rain.

In addition, the filter 145 can be manufactured by controlling the size of the filter hole H freely using methods such as gravure printing, electroforming / electroless plating, and the above method can be performed at low cost, thus reducing the cost. There is an advantage to this.

7 and 8 are schematic diagrams showing a filter according to another embodiment of the present invention.

Referring to FIG. 7, the filter 10 is characterized in that a plurality of nanowires 15 are formed on the surface of the mesh 11 so that the dust collecting efficiency is not lowered even if the amount of air passing through the filter 10 is increased. The plurality of nanowires 15 may be formed on the surface of the mesh 11 in a random direction.

The nanowire 15 may have a length of 1 μm to 1,000 μm and a diameter of 10 nm to 1,000 nm. Since the length of the nanowires 15 is approximately 탆 scale, it is similar to the 탆 scale diameter of the filter hole H. Thus, a plurality of nanowires 15 can be supported across the surface of the mesh 11.

In addition, since the diameter of the nanowire 15 is nm scale, the opening ratio of the filter hole H having a 탆 scale can be hardly lowered. In other words, even if the nano wires 15 are disposed on the surface of the mesh 11, the degree of ventilation of the filter hole H is hardly affected. The nanowire 15 is preferably disposed on the mesh 11 so as to occupy 10% or less of the filter hole H area (200 Pa or less). When the nanowires 15 are formed on the mesh 11, the occupancy ratio of the filter hole H may be controlled by adjusting the degree of the nanowires 15 dispersed in the nanowire dispersion.

Even though the nanowires 15 are disposed on the surface of the mesh 11, the nanowires 15 are disposed between the filter holes H, with little effect on the degree of ventilation of the filter holes H. This can serve to reduce the size of the filter hole (H). Accordingly, there is an effect that the dust collection efficiency is higher.

The manufacturing method for forming the nanowires 15 on the mesh 11 surface is as follows. First, nanowires are dispersed in water, an organic solvent, or the like to prepare a nanowire dispersion. Certain adhesives, activators, and the like may be further added to the nanowire dispersion so that the nanowires 15 may be better attached to the mesh 11 surface. The nanowire dispersion may be disposed on the mesh 11 (metal mesh structure) using a method such as filtration and coating. Subsequently, when the solvent is volatilized through a heat treatment of 100 degrees or more, the nanowires 15 are structurally connected to the surface of the mesh 11.

The material of the nanowires 15 may be any known material that may constitute the nanowires without any limitation. In particular, when the nano wire 15 is used as a metal material, the advantages of the above-described metal filter can be retained as they are.

Referring to FIG. 8, in the filter 10 ′ according to another embodiment, a plurality of nanoparticles 17 may be further formed on the surface of the mesh 11 and the surface of the nanowire 15. In order to place the nanoparticles 17, the nanoparticles may be further dispersed when preparing the nanowire dispersion.

It is preferable that the nanoparticles 17 also have a diameter similar to that of the nanowires 15. Thus, even if the nanoparticles 17 are disposed on the surface of the mesh 11 and the surface of the nanowires 15, the degree of ventilation of the filter hole H is hardly affected. In addition, since the nanowires 15 and the nanoparticles 17 are disposed between the filter holes H, the size of the filter holes H may be substantially reduced. As a result, the dust collection efficiency can be further increased.

As described above, the present invention has the effect of increasing the replacement cycle of the main filter by collecting the dust contained in the air passing through the pre-filter as much as possible. In addition, when the outside air is introduced into the room through the pre-filter it is effective to collect the dust of the smaller size than the existing products to supply clean air.

Although the present invention has been shown and described with reference to preferred embodiments as described above, it is not limited to the above embodiments and various modifications made by those skilled in the art without departing from the spirit of the present invention. Modifications and variations are possible. Such modifications and variations are intended to fall within the scope of the invention and the appended claims.

Claims (4)

A filter for filtering fine dust in the air,
The filter, which is metallic and the diameter of the filter ball is larger than 0.001mm and smaller than 0.2mm. The prefilter of the air cleaning device further comprising the filter of Claim 1, and the frame which supports a filter. The dustproof network further comprising the filter of Claim 1, and the frame which supports a filter. A ventilation window further comprising the filter of claim 1 and a frame supporting the filter.

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