KR20220106296A - Electric dust collector - Google Patents

Abstract

The present invention relates to a dust collection filter, and more specifically, relates to a dust collection filter including a diffusion charger. According to one aspect of the present invention, provided may be a dust collection filter which includes a diffusion charger disposed upstream of an air flow path and connected to a high voltage generator; and a filter disposed downstream of the air flow path and filtering dust in the air, wherein the diffusion charger generates ions to charge the dust in the air, the charged dust is collected in the filter by electrostatic force, and the filter has a plurality of perforated holes formed. According to the present invention, dust in the air can be effectively collected.

Description

Dust collection filter {Electric dust collector}

The present invention relates to a dust collecting filter, and more particularly, to a dust collecting filter including a diffusion charger.

In general, an indoor unit or an air purifier of an air conditioner includes an air filter to create a comfortable indoor environment. The air filter is a configuration for purifying air containing contaminants such as dust and bacteria into clean air.

Recently, an air filter, such as a melt blown filter, which is excellent in cleanliness enough to filter ultra-fine dust, etc. has been used.

Melt blown filters can be made of ultrafine fibers compared to filters made of general materials. Therefore, it has excellent flexibility and can be transformed into various shapes, and has the advantage of superior filtering performance compared to other general filters of the same volume.

In the case of an air conditioner or an air purifier, not only the air cleaning performance must be guaranteed, but also the flow of air must be smooth. In order for the air to flow smoothly, the pressure loss occurring in the filter must be reduced.

The prior art (KR 10-2014-0038157) relates to a fibrous filter, such as a Melt Blown filter. In the case of a fibrous filter, the filtration efficiency varies depending on the thickness of the fiber or the amount of fiber. As the fiber becomes thinner or the amount of fiber increases, the filtration efficiency increases. However, when the filtration efficiency increases, the thickness of the filter also increases, which causes a problem that pressure loss increases. In addition, even when reducing the pressure loss, there is a problem that the filtration efficiency is reduced.

KR 10-2014-0038157

The problem to be solved by the present invention is to provide a dust collecting filter with low pressure loss while ensuring filtration efficiency.

Another object of the present invention is to provide a dust collecting filter with improved dust collecting performance due to enhanced electrostatic force.

Another object of the present invention is to provide a dust collecting filter capable of effectively reducing pressure loss with a simple structure.

Another object of the present invention is to provide an economical dust collecting filter by reducing production cost and production time through an efficient production process.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to one aspect of the present invention, a diffusion charger disposed upstream of the air flow path and connected to the high voltage generator; and a filtration filter disposed downstream of the air flow path to filter dust in the air, wherein the diffusion charger generates ions to charge dust in the air, and the charged dust is collected in the filtration filter by electrostatic force , The filtration filter may be provided with a dust collecting filter having a plurality of perforated holes.

In addition, the filtration filter, a first surface through which air is introduced and a second surface through which air is discharged, the first surface may be provided with a dust collecting filter spaced apart from the diffusion charger.

In addition, the filtration filter may be provided with a dust collection filter including a main filter layer for filtering dust in the air, and a support filter layer for supporting the main filter layer.

In addition, the main filter layer may be provided with a dust collecting filter that is a melt blown filter.

In addition, the plurality of perforated holes includes a plurality of first perforated holes formed in the support filter layer and a plurality of second perforated holes formed in the main filter layer, wherein the first perforated hole and the second perforated hole are The number, shape, and location of the dust collecting filter formed to correspond to each other may be provided.

In addition, the plurality of perforated holes may be provided with a dust collecting filter formed in a circular shape having a diameter of 0.4 mm or more.

In addition, the plurality of perforated holes may be provided with a dust collecting filter disposed to be spaced apart from each other at equal intervals.

In addition, the plurality of perforated holes may be provided with a dust collecting filter in which a ratio of an area occupied by the plurality of perforated holes to an area occupied by one side of the filtering filter is 2.5% to 6.0%.

In addition, the filter filter comprises a fabric forming step in which fiber strands are randomly arranged to form a filter fabric, and a perforated hole forming step in which the plurality of perforated holes are perforated by a plurality of pins after the fabric forming step A dust collecting filter in which an electrostatic force is formed in the plurality of perforated holes by friction between the plurality of pins and the plurality of perforated holes in the perforated hole forming step may be provided.

According to one aspect of the present invention, there may be provided an air purifier comprising the dust collecting filter according to claim 1 .

According to one aspect of the present invention, an air conditioner including the dust collecting filter according to claim 1 may be provided.

According to the present invention, there are one or more of the following effects.

First, there is an advantage in that it is possible to provide a dust collecting filter capable of effectively collecting dust in the air including a diffusion charger.

Second, there is an advantage in that a plurality of perforated holes are formed in the filtration filter to provide a dust collecting filter with significantly reduced pressure loss.

Third, there is an advantage in that it is possible to provide an economical dust collecting filter by allowing a plurality of perforated holes to be formed after the filtration filter is produced.

Fourth, there is an advantage in that it is possible to provide a dust collecting filter with reduced pressure loss while ensuring filtration by optimizing the area occupied by a plurality of perforated holes.

Fifth, there is an advantage in that the electrostatic force is strengthened in the process of forming a plurality of perforated holes to provide a dust collecting filter with guaranteed filtration performance.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a conceptual diagram illustrating a dust collecting filter according to an embodiment of the present invention.
2 is a perspective view showing the filtration filter of the dust collecting filter.
3 is an enlarged view of the filtration filter shown in FIG. 2 .
4 shows that the filtering filter is formed by bending several times, including a plurality of mountains and valleys.
5 shows a case in which the diameter of the perforated hole is 0.4 mm and the case in which the diameter of the perforated hole is 0.3 mm in an actual filtration filter.
6 shows that the electrostatic force is strengthened at the edge of the perforated hole in the process of forming the perforated hole in the filtration filter.
7 shows the experimental results of measuring the dust collection efficiency according to the porous hole area ratio.
8 is a graph comparing the dust collection efficiency of a filter having no perforated hole and a filtration filter having a perforated hole area ratio of 3% through an experiment.
9 shows a process for producing a filtration filter of the dust collection filter.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout. The front (F), after (R), left (Le), right (Ri), upper (U), and lower (D) marks shown in the drawings are for explanation of the dust collecting filter according to the present embodiment. Accordingly, if the reference is changed, the direction setting may be differently grasped.

Hereinafter, a dust collecting filter according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 1 , a dust collecting filter according to an embodiment of the present invention includes a diffusion charger 100 and a filtration filter 200 .

A diffusion charger 100 and a filtration filter 200 are disposed in the air flow path. The diffusion charger 100 may be disposed upstream of the air flow path. The diffusion charger 100 is connected to the high voltage generator HV. The high voltage generator (HV) generates a high voltage. The high voltage generated by the high voltage generator HV is applied to the diffusion charger 100 , and the diffusion charger 100 generates negative ions e. Anions (e) generated in the diffusion charger 100 adhere to dust particles (P) in the air upstream of the air flow path and charge the dust particles (P).

The diffusion charger 100 and the filtering filter 200 may be disposed in the air conditioner 10 or the air purifier 20 . In this case, the diffusion charger 100 may be disposed on the air inlet side of the air conditioner 10 or the air purifier 20 , and the filtration filter 200 introduces air while being spaced apart from the diffusion charger 100 . Doedoe arranged on the side, it may be arranged on the side closer to the air outlet than the diffusion charger (100).

The filtration filter 200 may be disposed downstream of the air flow path. An electrostatic force acts on the filtration filter 200 . Dust particles (P) charged by the diffusion charger 100 by the electrostatic force of the filtration filter 200 adhere to the filtration filter 200, and the dust particles P can be collected in the filtration filter 200. have.

Referring to FIG. 1 , the filtering filter 200 may be disposed on an air flow path, so that a first surface 230 through which air is introduced and a second surface 240 through which air is discharged may be formed. At this time, the filtration filter 200 may be disposed to be spaced apart from the diffusion charger 100 so that the first surface 230 through which air is introduced is spaced apart from the diffusion charger 100 . The first surface 230 may be formed on a support filter layer 210 to be described later, and the second surface 240 may be formed on a main filter layer 220 to be described later. The first surface 230 may be formed in the valley 270 of the filtration filter 200 to be described later, and the second surface 240 may be formed in the acid 260 of the filtration filter 200 to be described later. (Fig. 4)

Referring to FIG. 2 , the filtering filter 200 may include a main filter layer 220 that filters dust particles P in the air charged by negative ions e generated in the diffusion charger 100 . The filtering filter 200 may include a support filter layer 210 supporting the main filter layer 220 . At this time, the support filter layer 210 may be disposed upstream of the air flow path than the main filter layer 220 .

The main filter layer 220 may be a fibrous filter formed of fibers. Characteristics such as material, thickness, density, and pore size of the fiber may vary. The main filter layer 220 may be a melt blown filter. A melt blown filter can be made of ultrafine fibers compared to a filter made of a general material. Therefore, when a melt blown filter is applied, it is easy to deform into various shapes due to excellent flexibility, and has the advantage of excellent filtration performance compared to other general filters of the same volume and density.

The support filter layer 210 may be laminated to the main filter layer 220 . The support filter layer 210 may be laminated to the main filter layer 220 by an adhesive or fusion method. The support filter layer 210 may be formed of a woven or non-woven material. The support filter layer 210 may support the main filter layer 220 to stably fix the position and shape of the main filter layer 220 . The pores of the support filter layer 210 are formed to be larger than the pores of the main filter layer 220, and may be provided as a pre-filter that primarily filters large dust particles P in the air.

Referring to FIG. 2 , a plurality of perforated holes 250 are formed in the filtration filter 200 . When the filtering filter 200 includes the support filter layer 210 and the main filter layer 220 , the plurality of perforated holes may include a first perforated hole 251 and a second perforated hole 252 . The first perforated hole 251 is formed in the support filter layer 210 . The second perforated hole 252 is formed in the main filter layer 220 . The plurality of first perforated holes 251 and the plurality of second perforated holes 252 may be formed to correspond to each other in number, shape, and location. That is, when viewed from the support filter layer 210 side or the main filter layer 220 side, the first perforated hole 251 and the second perforated hole 252 can be seen as one continuous perforated hole 250 . can be formed to

Referring to FIG. 2 , a plurality of perforated holes 250 of the filtration filter 200 are disposed to be spaced apart from each other. In this case, the plurality of perforated holes 250 may be disposed to be spaced apart from each other by the same perforated hole spacing L. In addition, the plurality of first perforated holes 251 and the plurality of second perforated holes 252 may also be disposed to be spaced apart from each other at the same first and second perforated hole intervals L1 and L2, respectively. In this case, the first perforated hole spacing L1 and the second perforated hole spacing L2 may be the same as each other.

3 is an enlarged view of the filtering filter 200 shown in FIG. 2 . The perforated hole 250 of the filtration filter 200 may be formed as a hole having a circular cross section. A circular hole having a hole diameter (D) of the hole hole 250 may be formed. In this case, the first perforated hole diameter D1 of the second perforated hole 252 and the second perforated hole diameter D2 of the second perforated hole 252 may be formed to be the same as each other.

5 shows a case in which the perforated hole diameter (D) of the perforated hole 250 is 0.4 mm (left) and a case in which the perforated hole diameter (D) is 0.3 mm (right).

Referring to FIG. 5 , when the diameter D of the right side of the perforated hole is formed to be 0.3 mm, the perforated hole 250 is blocked by the fiber, and thus it can be seen that the perforated hole 250 is not properly formed. On the other hand, it can be seen that when the hole diameter (D) on the left side is formed to be 0.4 mm, the hole hole 250 is formed while maintaining a uniform size and shape without clogging the fibers. Therefore, the hole diameter (D) may be preferably formed to be 0.4mm or more.

Referring to FIG. 4 , the filtering filter 200 may be formed in a shape in which the mountains 260 and the valleys 270 are repeatedly bent several times. The acid 260 may include a support filter layer acid 261 and a main filter layer acid 262 . The trough 270 may include a support filter layer trough 271 and a main filter layer trough 272 . In this case, a plane including a plurality of valleys 270 may form a first surface 230 through which air is introduced, and a plane including a plurality of mountains 260 may form a second surface 240 through which air is discharged. ) can be formed. The mountain 260 and the valley 270 may be formed in the remaining portion of the filtration filter 200 in which the perforated hole 250 is not formed.

Referring to FIG. 3 , the total flow rate passing toward the filtration filter 200 in the air flow path is

Total flow through flow (Qtotal). The total flow rate (Qtotal) flows by bypassing the fiber flow rate (Qfiber) and the perforation hole flow rate (Qhole). The flow rate through the fiber (Qfiber) is the flow rate through the fiber portion of the filtration filter 200, and the flow rate through the perforated hole (Qhole) means the flow rate through the perforated hole 250, not the fiber portion of the filtration filter 200. do.

The fiber flow rate Qfiber and the perforated hole flow rate Qhole may vary according to the ratio R of the area occupied by the plurality of perforated holes 250 to the entire filter area in the filtration filter 200 . According to the experimental results, assuming that the perforated hole area ratio (R) is constant, even if the perforated hole diameter (D) or the perforated hole spacing (L) changes, the fiber passage flow rate (Qfiber) and the perforated hole passage flow rate ( Qhole) was not significantly changed. Therefore, it can be said that the perforated hole area ratio (R) determines the fiber passage flow rate (Qfiber) and the perforated hole passage flow rate (Qhole).

On the other hand, in the case of the perforated hole area ratio (R), assuming that the perforated hole 250 has a circular cross section and the perforated hole diameter (D) and the perforated hole spacing (L) are constant, the perforated hole area ratio (R) is (πD ² )/(4L ² ).

As the flow rate through the fiber (Qfiber) increases, the physical filtration efficiency may increase, but the pressure loss may also increase. As the flow rate (Qhole) increases, the pressure loss decreases, but the physical filtration efficiency may also decrease. At this time, the physical filtration efficiency is measured through the concentration of dust particles (P) in the air before and after passing through the filtration filter 200 in a state excluding the electrostatic force of the filtration filter 200 . That is, when a plurality of perforated holes 250 are formed in the filtration filter 200, it can be seen that the pressure loss of the filtration filter 200 is reduced, but the physical filtration efficiency is also reduced. However, as will be described later, the electrostatic force is strengthened in the piercing process of the filtration filter 200 and the filtration efficiency due to static electricity increases, so that the decrease in the overall filtration efficiency (dust collection efficiency) of the filtration filter 200 is the decrease in the physical filtration efficiency It can be seen that the formation is significantly lower than that.

6 shows that the electrostatic force is strengthened at the edge of the perforated hole 250 in the process of forming the perforated hole 250 in the filtration filter 200 .

Referring to FIG. 6 , it can be seen that the pin T has a pointed end. The fin T passes through the filtration filter 200 , and friction occurs between the fin T and the filtration filter 200 in this process. By friction between the fin T and the filtration filter 200 , an electric charge is generated between the fin T and the filtration filter 200 , and positive charges are charged on the inner peripheral surface or corner of the perforated hole 250 . The pin (T) moves the filtration filter 200 back and forth over the filtration filter 200 multiple times, and may cause friction multiple times. Through this process, the electrostatic force may be strengthened in the filtration filter 200 .

7 shows the experimental results of measuring the dust collection efficiency according to the perforated hole area ratio (R). The horizontal axis represents pressure loss, and the vertical axis represents dust collection efficiency. The dust collection efficiency is the measured efficiency considering not only the physical filtration efficiency but also the filtration efficiency by electrostatic force. According to the graph of FIG. 7, as the perforated hole area ratio (R) increases to 5.85%, 2.6%, and 1.46%, the dust collection efficiency differs only by about 20%, but the pressure loss is almost doubled from 6Pa to 12Pa. it can be seen that

8 is a graph comparing the dust collection efficiency of the non-perforated filter and the filtration filter 200 having a perforated hole area ratio (R) of 3% through an experiment. The horizontal axis represents the type of filter, and the vertical axis represents dust collection efficiency. Referring to the graph of FIG. 8 , in the case of the filtration filter 200 in which the perforated hole 250 is formed, compared to the non-perforated filter, the physical filtration efficiency decreases by 8.1%, but the filtration efficiency by electrostatic force increases by 5.3% Therefore, it can be seen that the total dust collection efficiency decreased by only 2.8%. Therefore, when the perforated hole 250 is formed in the filtration filter 200, the pressure loss is greatly reduced and the dust collection efficiency is slightly reduced, so that it can be seen that the pressure loss can be greatly reduced while ensuring sufficient dust collection efficiency as a whole. .

However, if the perforated hole area ratio (R) is excessively large, the physical filtration efficiency may be excessively reduced, and in order to ensure sufficient dust collection efficiency, it is necessary to adopt the optimal perforated hole area ratio (R). Accordingly, as a result of measuring the pressure loss according to the change of the perforated hole area ratio (R) while setting the minimum dust collection efficiency (40%), when the perforated hole area ratio (R) is formed from 2.5% to 6.0%, It was found that the reduction of the pressure loss was maximized while maintaining the minimum dust collection efficiency.

9 shows a process for producing the filtration filter 200 of the dust collection filter. The filtration filter 200 goes through a fabric forming step (S1) of forming a fabric, and then goes through a perforated hole forming step (S2) in which a perforated hole 250 is formed in a post-process.

When the filtration filter 200 includes the main filter layer 220 and the support filter layer 210 and the main filter layer 220 is a melt blown filter, the fabric forming step S1 is as follows. In the fabric forming step (S1), the melted raw material is sprayed to form fiber strands to form a plate-shaped melt blown filter. Then, the support filter layer 210 made of a woven or non-woven fabric is adhered or fused to the main filter layer 220, and the support filter layer 210 and the main filter layer 220 are laminated to produce a filtration filter 200. do. After the fabric forming step (S1), a perforated hole forming step (S2) is performed. In the perforated hole forming step (S2), the laminated filtration filter 200 is perforated with a pin (T) at once to form a perforated hole 250 . At this time, a roller from which a plurality of pins T protrude is provided, and the filtration filter 200 may be moved while the roller rotates to form a perforated hole 250 . At this time, a plurality of pins (T) formed on the roller may be disposed at equal intervals.

In the perforated hole forming step (S2), when the perforated hole 250 is formed, the fibers of the filtration filter 200 are not lost. Rather than forming the perforated hole 250 by removing the filtration filter 200 corresponding to the size of the perforated hole 250 , the fiber strand of the filtering filter 200 is pushed toward the edge of the perforated hole 250 . (250) is formed. In general, the dust collection life of the filtration filter 200 may vary depending on the amount of accommodating the dust particles (P). The amount of the filtration filter 200 receiving the dust particles (P) is proportional to the amount of fibers. Accordingly, since the amount of fibers is maintained in the process of forming the perforated hole 250 , the dust collection life of the filtration filter 200 may be maintained.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications may be made by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

10: air conditioner
100: diffusion charger
20: air purifier
200: filtration filter
210: support filter layer
220: main filter layer
230: first side
240: second side
250: perforated hole
251: first perforated hole
252: second perforated hole
260: acid
261: support filter layer acid
262: main filter layer acid
270 : Goal
271: support filter layerer goal
272: main filter layer goal
D: hole diameter
D1: diameter of the first perforated hole
D2: 2nd hole diameter
e: anion
HV : high voltage generator
L : Perforated hole spacing
L1: first perforated hole spacing
L2: 2nd hole spacing
P : dust particles
Qfiber: Flow Through Fiber
Qhole : Flow rate through the perforated hole
Qtotal: total flow through
R: Perforated hole area ratio
S1: Fabric forming step
S2: Perforated hole formation step
T: pin

Claims (11)

a diffusion charger disposed upstream of the air flow path and connected to the high voltage generator; and
a filtration filter disposed downstream of the air flow path and configured to filter dust in the air;
The diffusion charger generates ions to charge dust in the air, and the charged dust is collected in the filtration filter by electrostatic force,
The filtration filter is a dust collecting filter having a plurality of perforated holes. The method of claim 1,
The filtration filter is
A first surface through which air is introduced and a second surface through which air is discharged are formed,
The first surface is a dust collecting filter spaced apart from the diffusion charger. The method of claim 1,
The filtration filter is
A main filter layer that filters dust in the air,
A dust collection filter comprising a support filter layer supporting the main filter layer. 4. The method of claim 3,
The main filter layer,
A dust collecting filter that is a melt blown filter. 4. The method of claim 3,
The plurality of perforated holes,
a plurality of first perforated holes formed in the support filter layer;
and a plurality of second perforated holes formed in the main filter layer,
The first perforated hole and the second perforated hole are formed such that the number, shape, and position correspond to each other. The method of claim 1,
The plurality of perforated holes,
A dust collecting filter formed in a circle with a diameter of 0.4 mm or more. The method of claim 1,
The plurality of perforated holes,
Dust collection filters arranged at equal intervals from each other. The method of claim 1,
The plurality of perforated holes,
For the area occupied by one side of the filtration filter,
A dust collecting filter in which the ratio of the area occupied by the plurality of perforated holes is 2.5% to 6.0%. The method of claim 1,
The filtration filter is
A fabric forming step in which fiber strands are randomly arranged to form a filter fabric, and
Manufactured by a process including a perforated hole forming step in which the plurality of perforated holes are perforated by a plurality of pins after the fabric forming step,
In the perforated hole forming step,
A dust collecting filter in which an electrostatic force is formed in the plurality of perforated holes by friction between the plurality of pins and the plurality of perforated holes. An air purifier comprising the dust collecting filter according to claim 1 . An air conditioner comprising the dust collecting filter according to claim 1 .

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