KR102469442B1 - Cylindrical Filter for Air Cleaner Having Excellent Deodorization and Process for Thereof - Google Patents

Abstract

The present invention maximizes the deodorizing surface through compactness and structural improvement of the deodorizing filter by embedding the deodorizing filter in the cylindrical HEPA filter to improve the deodorizing function and reduce ventilation negative pressure. It relates to a cylindrical filter for an air purifier with excellent deodorizing properties and a method for manufacturing the same, characterized by a method for economically manufacturing a filter with significantly improved efficiency such as reducing and reducing the filter and a lightweight filter.

Description

Cylindrical Filter for Air Cleaner Having Excellent Deodorization and Process for Thereof

The present invention relates to a cylindrical filter for an air purifier with excellent deodorizing properties and a manufacturing method thereof. More specifically, the deodorization filter is built into the cylindrical HEPA (High Efficiency Particulate Arresting, HEPA) filter to make it compact and the structure of the deodorization filter is maximized to maximize the deodorization surface, improving the deodorization function and improving ventilation. It is a technology characterized by a method for economically manufacturing a filter with significantly improved efficiency such as reducing negative pressure and a lightweight filter.

A filter for an air purifier is a device for purifying polluted indoor air, and a cylindrical filter is mainly used. Depending on the product, it has various types and functions, such as a pre filter that blocks the inflow of foreign substances, a HEPA filter that filters out dust or germs, and a deodorizing filter that is effective in removing bad odors. Recently, many products equipped with a complex filter instead of a single filter have been released, and periodic filter replacement or cleaning is required when in use.

As a prior art related to this, Patent Document 001 below discloses a “circular filter for an air cleaner” (see FIG. 1). However, this only facilitates the configuration of filters having various shapes by using a filter frame made of a foam material, and there is a problem in that odor cannot be efficiently removed.

In addition, Patent Document 002 below discloses “a filter and an assembly method thereof”. However, this is a filter equipped with a cylindrical filter media impregnated with activated carbon on a wrinkled sheet-like nonwoven fabric, which is compact and can secure filtration throughput, can be easily assembled during installation, and can not efficiently remove fine dust and odors. there is

In addition, Patent Document 003 below discloses “a filter for an air purifier and an assembly method thereof”. However, it includes a bag filter, a pre-filter attached to one side of the filter, and an adhesive layer disposed between the pre-filter and the bag filter to attach them, so that the pressure loss is small and the dust collection efficiency is high. It can only be high, and in particular, there is a problem of not being able to efficiently remove odors.

Therefore, there is an urgent need to develop a cylindrical filter capable of efficiently removing odors and fine dust from polluted air by improving the structure of the filter.

Public Utility Model Publication No. 20-2020-0000231 (2020. 01. 30.) Japanese Unexamined Patent Publication No. 2016-168519 (2016. 9. 23.) Registered Patent Publication No. 10-1681754 (2016. 11. 25.)

The present invention has been made to solve the above-mentioned problems, and the deodorizing surface is improved by compacting the deodorizing filter by embedding the deodorizing filter in the cylindrical HEPA filter and improving the structure of the deodorizing filter. It is to provide a method for economically manufacturing a filter with significantly improved efficiency such as improving deodorization function and reducing ventilation negative pressure by maximizing the filter and a lightweight filter.

In order to achieve the above object, the present invention provides: 1) ridge-shaped nonwoven fabrics bent at the same height are bonded with a hot melt adhesive at long horizontal intervals to form a plurality of bending intervals, and the nonwoven fabric A cylindrical nonwoven fabric formed by bonding both ends with a hot melt adhesive, a net covering the outer surface of the cylindrical nonwoven fabric, and upper and lower filter frames bonded with urethane resin to the top and bottom of the cylindrical nonwoven fabric covered with the net. With a HEPA (HEPA) filter to; 2) A filter medium in which mountain-shaped inner and outer compartments are formed by embossing on the inside and outside, respectively, and a cylindrical filter medium to which both ends are bonded with an adhesive, and the outer compartment has a higher density than the inner compartment. A deodorization filter including activated carbon filled with more activated carbon, a net covering the inner and outer surfaces of the cylindrical filter medium filled with activated carbon, and a circular cap covering the top and bottom of the filter medium covered with the net; 3) To provide a cylindrical filter for an air purifier with excellent deodorization, which has a cap fixing both filters after the deodorizing filter is embedded in the HEPA filter.

In addition, the present invention 1) a first step of cutting the non-woven fabric; 2) a second step of bending the nonwoven fabric cut in the first step to the same height to form an angular shape, and then bonding the nonwoven fabric at horizontal intervals with a hot melt adhesive to match a plurality of bending intervals; 3) a third step of making a cylindrical nonwoven fabric by bonding both ends of the nonwoven fabric at the same bending distance in the second step with a hot melt adhesive; 4) a fourth step of making a HEPA filter by covering the outer surface of the cylindrical non-woven fabric made in the third step with a net and bonding the upper and lower filter frames to the upper and lower parts with urethane resin; 5) A fifth step of embossing the filter media inward and outward, respectively, to form ridge-shaped inner and outer compartments of the same height; 6) a sixth step of bonding both ends of the filter medium of the fifth step with a hot melt adhesive to fix it in a cylindrical shape; 7) a seventh step of applying hot melt adhesive to the ends of the outer and inner compartments formed in the fifth step, then filling the outer compartment with more activated carbon than the inner compartment, and then covering the inside and outside with a net; 8) An 8th step of making a deodorizing filter by covering the top and bottom of the filter media covered with a net in the 7th step and bonding them with urethane resin; 9) A 9th step of inserting the deodorization filter made in the 8th step into the HEPA filter made in the 4th step and then fixing and assembling the two filters by covering them with caps to fix them. It provides a method for manufacturing a cylindrical filter for an air purifier with excellent deodorization, characterized in that.

On the other hand, means for solving other specific problems according to the present invention are described in the detailed description of the invention.

The cylindrical filter for an air purifier with excellent deodorization according to the present invention is compact by embedding the deodorizing filter in the cylindrical HEPA filter and maximizes the deodorizing surface through structural improvement of the deodorizing filter. It can not only improve the function and reduce the negative pressure of ventilation, but also provide the function of removing odor and fine dust at the same time.

Furthermore, the method for manufacturing a cylindrical filter for an air purifier having excellent deodorization has the advantage of economically manufacturing a lightweight filter through compactness and structural improvement of the filter.

1 is a perspective view of a circular filter for an air cleaner according to the prior art.
2 is a schematic process diagram for manufacturing a cylindrical filter for an air cleaner according to the present invention.
3 is an exploded view of a HEPA filter and a deodorizing filter in a cylindrical filter for an air purifier according to the present invention. 4 is a perspective view of a deodorizing filter among cylindrical filters for an air purifier according to the present invention.
5 is a perspective view showing a state in which a filter medium of a deodorizing filter among cylindrical filters for an air purifier according to the present invention is embossed.
6 is a view showing inner and outer compartments, activated carbon, and a net in the filter medium of the cylindrical filter for an air purifier according to the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the following examples. This embodiment is provided to more completely explain the present invention to those skilled in the art. Accordingly, the shapes and detailed configurations of elements in the drawings have been simplified for explanation. And it should be noted that the terms used in this specification are terms used to appropriately express preferred embodiments of the present invention.

Hereinafter, a cylindrical filter for an air purifier with excellent deodorization and detailed features of a manufacturing method thereof will be described in detail with reference to the drawings. The manufacturing method of the cylindrical filter for an air purifier with excellent deodorization of the present invention is not limited thereto, and in addition, the manufacturing method of the cylindrical filter for an air purifier with excellent deodorization and various devices requiring the structure of the filter are not limited thereto. Of course it can be used.

2 to 6 are schematic drawings for explaining a cylindrical filter for an air purifier having excellent deodorizing properties and a method for manufacturing the same according to the present invention.

First, the manufacturing method of a cylindrical filter for an air purifier having excellent deodorization according to the present invention includes: 1) a first step of cutting a non-woven fabric; 2) a second step of bending the nonwoven fabric cut in the first step to the same height to form an angular shape, and then bonding the nonwoven fabric at horizontal intervals with a hot melt adhesive to match a plurality of bending intervals; 3) a third step of making a cylindrical nonwoven fabric by bonding both ends of the nonwoven fabric at the same bending distance in the second step with a hot melt adhesive; 4) a fourth step of making a HEPA filter by covering the outer surface of the cylindrical non-woven fabric made in the third step with a net and bonding the upper and lower filter frames to the upper and lower parts with urethane resin; 5) A fifth step of embossing the filter media inward and outward, respectively, to form ridge-shaped inner and outer compartments of the same height; 6) a sixth step of bonding both ends of the filter media of the fifth step with a hot melt adhesive to fix them in a cylindrical shape; 7) a seventh step of applying hot melt adhesive to the ends of the outer and inner compartments formed in the fifth step, then filling the outer compartment with more activated carbon than the inner compartment, and then covering the inside and outside with a net; 8) An 8th step of making a deodorizing filter by covering the top and bottom of the filter media covered with a net in the 7th step and bonding them with urethane resin; 9) a ninth step of inserting the deodorizing filter made in the eighth step into the HEPA filter made in the fourth step, and then fixing and assembling the two filters with caps. .

If the configuration for manufacturing the cylindrical filter for an air purifier having excellent deodorization is largely divided, it can be divided into a manufacturing process of a HEPA filter and a deodorizing filter, and an assembly process of both filters.

First, the HEPA filter is a high-performance filter that can filter 99.97% of fine dust with a size of 0.3㎛. The first step in the manufacturing process is to cut the nonwoven fabric, which is to cut the nonwoven fabric to an appropriate size according to the HEPA filter standard. The nonwoven fabric 3 is an electrostatic melt blown nonwoven fabric or a chemical bond nonwoven fabric as a material, and its material is polypropylene (PP), polyester (PET), polyphenylene sulfide (PPS), It is preferably any one selected from polytetrafluoroethylene (PTPE).

The second step is to bend the nonwoven fabric cut in the first step to the same height to form an angular shape, and then bond the nonwoven fabric at horizontal intervals with a hot melt adhesive to match a plurality of bending intervals. Specifically, after heating the nonwoven fabric 3 cut in the first step to 85 ° C., it is bent to the same height with a servo knife pleating M / C to form a mountain shape. This is a step of making a plurality of bending intervals constant by attaching them at long horizontal intervals with the hot melt adhesive 4.

The third step is a step of making a cylindrical nonwoven fabric by bonding both ends of the nonwoven fabric at the same bending distance in the second step with a hot melt adhesive. Specifically, in order to make the cylindrical non-woven fabric 4, both ends of the non-woven fabric having a constant bending interval in the second step are firmly fixed by bonding to each other with a hot melt adhesive.

The fourth step is to make a HEPA filter by covering the outer surface of the cylindrical nonwoven fabric made in the third step with a net and then bonding the upper and lower filter frames to the upper and lower parts with urethane resin. Specifically, in order to make a HEPA filter (1), a net is wrapped around the outer surface of the cylindrical nonwoven fabric (4) made in the third step, and then the upper and lower filter frames (2) and (5) are placed on the upper and lower parts of the urethane It is firmly fixed by bonding with resin. In this way, the HEPA filter 1 can be made by sequentially going through the first step to the fourth step and finishing.

Continuing below, a process for manufacturing the deodorizing filter 6 will be described. The fifth step is a step of embossing the filter medium inwardly and outwardly to form mountain-shaped inner and outer compartments of the same height. Specifically, the fifth step is a preparation step for manufacturing the deodorizing filter 6, and continuously forms internal and external compartments 13 and 14, which can be referred to as spaces in which the activated carbon 11 is filled. In order to do this, after preparing the filter medium 8, internal and external embossing is performed to separate and form mountain-shaped internal and external compartments 13 (14) of the same height. That is, FIG. As shown in 4, the thickly marked part of the rectangle is convex, and the part marked with X is concave. This is to prevent the contact area from decreasing due to the formation of an empty space at the top as the activated carbon 11 sinks down over time, and the filter medium 8 is made of high-density polyethylene (HDPE) or polypropylene (PP). ) and acrylonitrile butadiene styrene (ABS), and preferably has a thickness of 0.5 to 1.0 mm. It is preferable to install the inner and outer compartments 13 and 14 in a mountain shape to be doubled.

A sixth step is a step of bonding both ends of the filter medium of the fifth step with a hot melt adhesive to fix them in a cylindrical shape. Specifically, in order to make the filter medium 8 into a cylindrical shape, both ends of the filter medium in which the inner and outer compartments 13 and 14 are continuously formed are firmly fixed by bonding to each other with a hot melt adhesive.

A seventh step is a step of applying a hot melt adhesive to the ends of the outer and inner compartments formed in the fifth step, then filling the outer compartment with more activated carbon than the inner compartment, and then covering the inner and outer sides with a net. Specifically, the hot melt adhesive is sequentially applied to the tops 8-1 and 8-2 of the outer compartment 14 and the inner compartment 13 continuously formed on the filter medium 8 (see FIG. 6 (c)) , Activated carbon 11 is sequentially charged in the outer compartment 14 and the inner compartment 13, respectively. At this time, the outer compartment 14 is filled with more activated carbon 11 than the inner compartment 13 (see FIGS. 5 and 6), because the cross section of the deodorizing filter is circular, This is because, when looking at the filling space of the activated carbon, there is a difference between a small inside and a large outside. According to the prior art, as the activated carbon filled in the compartment goes down from top to bottom over time, a space is formed in the upper part of the compartment, resulting in a problem that the deodorizing effect may decrease, but the present invention solves this problem by doing the above. can

On the other hand, activated carbon is made by treating wood, lignite, peat, etc. with chemicals such as zinc chloride or phosphoric acid as an activator, drying it, or activating charcoal with water vapor, and its particle size is 3 mm. Activated carbon is also used in air purifiers as a deodorant capable of removing odors generated from harmful substances such as formaldehyde and volatile organic compounds (VOCs) or as an adsorbent absorbing moisture.

Furthermore, since the hot melt adhesive has already been applied to the tops 8-2 and 8-1 of the inner and outer compartments 13 and 14 filled with the activated carbon 11, the nets 10 and 12 are adhered to surround them. put on At this time, in order to prevent the deodorization efficiency from deteriorating because the activated carbon having a particle size of 3 mm filled in the inner and outer compartments 13 and 14 is released outside, the mesh 10 and 12 use a product having a gap of 2.5 mm. it is desirable In addition, the material of the meshes 10 and 12 is polyethylene (PE) or polypropylene (PP).

Step 8 is a step of making a deodorizing filter by putting round caps on the top and bottom of the filter medium covered with a net in step 7 and bonding them with urethane resin. Specifically, the deodorizing filter 1 is made by putting circular caps on the top and bottom of the cylindrical filter medium 8 covered with a net and then bonding them with urethane resin.

A ninth step is a step of inserting the deodorizing filter made in the eighth step into the HEPA filter made in the fourth step, and then fixing the two filters with caps so as to assemble them. Specifically, after inserting the deodorizing filter 6 into the HEPA filter 1, covering the caps for fixing both filters, and then firmly bonding them with urethane resin to assemble, excellent deodorization according to the present invention It becomes possible to manufacture a cylindrical filter.

Cylindrical filters with excellent deodorization properties, sequentially manufactured through the first to ninth steps, are: 1) ridge-shaped nonwoven fabrics bent at the same height are bonded with hot melt adhesives at horizontal intervals, A cylindrical nonwoven fabric formed by forming a bending gap and bonding both ends of the nonwoven fabric with a hot melt adhesive, a net covering the outer surface of the cylindrical nonwoven fabric, and a cylindrical nonwoven fabric covered with the net Adhesion with urethane resin to the top and bottom of the nonwoven fabric a HEPA filter including upper and lower filter frames; 2) A filter medium in which mountain-shaped inner and outer compartments are formed by embossing on the inside and outside, respectively, and a cylindrical filter medium to which both ends are bonded with an adhesive, and the outer compartment has a higher density than the inner compartment. A deodorization filter including activated carbon filled with more activated carbon, a net covering the inside and outside of the cylindrical filter medium filled with activated carbon, and a circular cap covering the top and bottom of the cylindrical filter medium covered with the net; 3) After the deodorizing filter is embedded in the HEPA filter, a cap for fixing both filters is provided.

In addition, in order to further improve the deodorization efficiency of the filter in a short time, it is preferable to install double internal and external compartments 13 and 14 in the shape of a mountain where the embossing is formed.

Furthermore, the cylindrical filter for an air purifier with excellent deodorization according to the present invention is compact by incorporating a deodorizing filter into a cylindrical HEPA filter and maximizes the deodorizing surface through structural improvement of the deodorizing filter. It can improve the deodorization function, reduce the negative pressure of ventilation, and also provide the function of removing odor and fine dust at the same time.

In addition, the method for manufacturing a cylindrical filter for an air purifier having excellent deodorization has the advantage of economically manufacturing a lightweight filter through compacting and structural improvement of the filter.

Hereinafter, the configuration of the present invention and its effects will be described in detail through Examples and Comparative Examples.

<Example 1>

A cylindrical filter having excellent deodorization properties according to the present invention could be manufactured according to the following process.

o Manufacture of HEPA filters

1) The electrostatic melt blown nonwoven fabric was cut and warmed according to the HEPA filter standard, then bent to the same height with a bending machine to form an angular shape, and then bonded horizontally and long with a hot melt adhesive to set a plurality of bending intervals constant.

2) Subsequently, both ends of the non-woven fabric with matching bending intervals were contacted with a hot melt adhesive to make a cylindrical non-woven fabric, and then a mesh was covered on the outer surface of the non-woven fabric, and a filter frame was attached to the top and bottom to manufacture a HEPA filter.

o Manufacture of deodorizing filters

1) Filter media (made by HDPE) were embossed inside and outside to form inner and outer compartments of the same height, and both ends of the filter media were bonded with hot melt adhesive to fix them in a cylindrical shape.

2) Subsequently, hot melt adhesive is sequentially applied to the ends 8-1 and 8-2 of the outer compartment 14 and the inner compartment 13 continuously formed in the cylindrical filter medium 8, and then the outer compartment 14 Activated carbon 11 was sequentially charged into the inner compartment 13 and the inner compartment 13 respectively.

3) After filling the outer compartment 14 with more activated carbon (3 mm × 5 mm) than the inner compartment 13, the outer and inner sides of the filter media 8 are covered with a net with a gap of 2.5 mm in turn, and then cylindrical filter media A deodorizing filter was made by covering the top and bottom of the circular cap and bonding it with urethane resin.

o Cylindrical filter assembly

After inserting the deodorization filter inside the HEPA filter, caps were put on both filters to fix them and assemble them.

<Example 2>

Compared to Example 1, the only difference was that the inner and outer compartments of the deodorizing filter were installed in two layers, and the rest was the same to manufacture a cylindrical filter.

<Comparative Example>

A commercially available Puricare Mont Blanc D air purifier filter (HEPA filter + deodorization filter combination) was used.

<Experimental Example> Formaldehyde Removal

Table 1 shows the formaldehyde removal rates and measured values of the filters of Examples 1 and 2 and Comparative Examples according to CADR (Clean Air Delivery Rate), a standard established by the American Home Appliance Association (AHAM).

Formaldehyde removal rate (%) Example 1 Example 2 comparative example 90.1 99.8 85.5 Formaldehyde CADR readings Example 1 Example 2 comparative example 0.85 1.20 0.57

[Analysis of test results]

From the above table, which is the experimental results of Examples 1 and 2 and Comparative Example, the cylindrical filter according to Preferred Examples 1 and 2 of the present invention has a high formaldehyde removal rate and a very excellent CADR function compared to the filter of Comparative Example. And it was found. In addition, the structure and manufacturing process are simpler than those of existing air purifier filters, making it possible to manufacture lightweight products (about 40%) economically (about 50%).

The present invention has been described above with reference to drawings and embodiments, but these correspond to examples, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. will be. Therefore, it will be obvious that the true technical protection scope of the present invention is defined by the claims below.

1: HEPA filter 2, 7: upper frame
3: non-woven fabric 4: hot melt
5, 9: lower frame 6: deodorization filter
8: filter material 8-1, 8-2: apex
10, 12: net body 11: activated carbon
13: inner compartment 14: outer compartment

Claims (6)

1) A cylindrical nonwoven fabric formed by attaching a mountain-shaped nonwoven fabric bent at the same height horizontally and long with a hot melt adhesive to form a plurality of bending intervals, and bonding both ends of the nonwoven fabric with a hot melt adhesive, A HEPA filter including a net covering the outer surface of the cylindrical nonwoven fabric and upper and lower filter frames bonded to upper and lower portions of the cylindrical nonwoven fabric covered with the net with urethane resin;
2) A cylindrical filter medium having mountain-shaped inner and outer compartments formed by embossing on the inside and outside, respectively, to which both ends are bonded with an adhesive, and the outer compartment is filled more than the inner compartment A deodorizing filter including activated carbon that forms a large space and is filled more, a net covering the inside and outside of the cylindrical filter medium filled with activated carbon, and a circular cap covering the top and bottom of the cylindrical filter medium covered with the net ;
3) A cylindrical filter for an air purifier having excellent deodorization property, characterized in that the HEPA filter is provided with a cap for fixing both filters after the deodorizing filter is embedded.
According to claim 1,
The nonwoven fabric is an electrostatic melt blown nonwoven fabric or a chemical bond nonwoven fabric, the material of which is polypropylene (PP), polyester (PET), polyphenylene sulfide (PPS), polytetrafluoroethylene ( A cylindrical filter for an air purifier with excellent deodorization, characterized in that it is selected from PTPE).
According to claim 2,
Cylindrical filter for an air purifier with excellent deodorization, characterized in that the inner and outer compartments of the mountain shape formed by embossing the inside and outside are formed in double.
1) The first step of cutting the non-woven fabric;
2) a second step of bending the nonwoven fabric cut in the first step to the same height to form an angular shape, and then bonding the nonwoven fabric at horizontal intervals with a hot melt adhesive to match a plurality of bending intervals;
3) a third step of making a cylindrical nonwoven fabric by bonding both ends of the nonwoven fabric at the same bending distance in the second step with a hot melt adhesive;
4) a fourth step of making a HEPA filter by covering the outer surface of the cylindrical non-woven fabric made in the third step with a net and bonding the upper and lower filter frames to the upper and lower parts with urethane resin;
5) A fifth step of embossing the filter media inward and outward, respectively, to form ridge-shaped inner and outer compartments of the same height;
6) a sixth step of bonding both ends of the filter medium of the fifth step with a hot melt adhesive to fix it in a cylindrical shape;
7) a seventh step of applying hot melt adhesive to the ends of the outer and inner compartments formed in the fifth step, then filling the outer compartment with more activated carbon than the inner compartment, and then covering the inside and outside with a net;
8) An 8th step of making a deodorizing filter by covering the top and bottom of the filter media covered with a net in the 7th step and bonding them with urethane resin;
9) A 9th step of inserting the deodorization filter made in the 8th step into the HEPA filter made in the 4th step and then fixing and assembling the two filters by covering them with caps to fix them. Method for manufacturing a cylindrical filter for an air purifier with excellent deodorization, characterized in that.
According to claim 4,
The nonwoven fabric of the first step is an electrostatic melt blown nonwoven fabric or a chemical bond nonwoven fabric, the material of which is polypropylene (PP), polyester (PET), polyphenylene sulfide (PPS), poly A method of manufacturing a cylindrical filter for an air purifier having excellent deodorization, characterized in that it is selected from tetrafluoroethylene (PTPE).
According to claim 5,
Production of a cylindrical filter for an air purifier with excellent deodorization, characterized in that the inner and outer compartments of the mountain shape formed by embossing the inside and outside of the fifth step are formed in double Way.

Images