KR102409491B1 - Wet type air filter - Google Patents

Abstract

A wet air filtration device according to an embodiment of the present invention includes a housing including an internal space for purifying polluted air, a spraying part for spraying washing water inside the housing, and both ends of the housing, cleaning the inside of the housing It includes a watertight part for sealing water, and the watertight part includes a plurality of mesh plates, and the mesh sizes of the plurality of mesh plates are different from each other.

Description

Wet air filter {WET TYPE AIR FILTER}

The present invention relates to a wet air filtration device, and more particularly, sprays washing water on polluted air introduced from the outside to remove pollutants contained in polluted air, and seals moisture through a watertight structure and sends only clean air to the outside It relates to an exhausting wet air filtration device.

In general, an air filtration device is a device that purifies air containing fine dust, various harmful gases, bacteria, etc. through a purification medium and then discharges the clean air to the outside. do.

First, the dry air filtration device can be divided into an electrostatic precipitation type and a filter filtration type. The electrostatic precipitation type has a disadvantage that the purification ability is reduced when dust accumulates in the electrostatic precipitation tube because there is no filter, and the filter filtration type requires regular filter replacement and expensive filter replacement cost.

On the other hand, the wet air filtration device can have an excellent dust removal function at a low cost by purifying the contaminated air sucked inside into clean air by contacting the fine water droplet particles.

However, in the conventional wet air filtration device, since a certain level of water is included in the filtration device, the parts of the filtration device operate in a state in direct contact with water, so that dirt may accumulate on the parts. In addition, there is a problem in that the water inside the filtration device leaks to the outside to damage a fan or a motor, thereby causing malfunction of the filtration device or lowering filtration efficiency and reliability.

Korean Patent Registration No. 10-1270551

The present invention is to solve the above problems, and by using washing water to purify pollutants such as fine dust, ozone, mold, bacteria, harmful gases, organic/inorganic substances, and harmful gases in the air while preventing the growth of microorganisms inside An object of the present invention is to provide a wet air filtration device that suppresses the air quality.

In addition, a wet air filtration device capable of stably discharging purified air by increasing the size of washing water or contaminant droplets by using the hydrophilic film phenomenon of the watertight part and increasing the collection efficiency of contaminants sucked into the housing is provided. There is a purpose.

In addition, wet air that effectively seals moisture and protects components outside the housing from moisture by increasing the size of the washing water or contaminant droplets gradually through the watertight part installed at the end of the housing and inducing them to fall to the lower part of the housing An object of the present invention is to provide a filtration device.

A wet air filtration device according to an embodiment of the present invention includes a housing including an internal space for purifying polluted air, a spraying part for spraying washing water inside the housing, and both ends of the housing, cleaning the inside of the housing It includes a watertight part for sealing water, and the watertight part includes a plurality of mesh plates, and the mesh sizes of the plurality of mesh plates are different from each other.

The plurality of mesh plates may be characterized in that the size of the mesh increases toward the outside in the inner space of the housing. The watertight part may include an intake watertight part located on one side of the housing and through which contaminated air flows into the housing, and an exhaust watertight part located on the other side of the housing and discharged to the outside of the housing. The watertight part may be characterized in that the surface in contact with the inner space of the housing is coated with any one or more of copper (Cu), tin (Sn), and silver (Ag).

A water tank located outside the housing and receiving cleaning water and supplying cleaning water to the spraying part, one side connected to the spraying part and the other side connected to the water tank to control the amount of cleaning water supplied to the spraying part, and watertight It is located on one side of the unit, it may further include a ventilation unit for discharging the air purified from the inside of the housing to the outside of the housing.

The wet air filtration device according to an embodiment of the present invention improves the capture efficiency of contaminants and stably adsorbs not only substances such as fine dust but also very small ultrafine particles such as relatively small bacteria, thereby purifying air. can improve

In addition, it is possible to prevent in advance the phenomenon that the cleaning water inside the housing leaks to the outside and causes malfunctions due to damage to the fan or motor by sealing the cleaning water sprayed on the housing or the contaminant droplets. It is possible to increase the filtration efficiency and reliability by protecting it from moisture.

1 is a perspective view schematically showing one form of a wet air filtering device according to an embodiment of the present invention.
2 is an exploded perspective view schematically showing a form of a wet air filtering device according to an embodiment of the present invention.
3 is a cross-sectional view schematically showing one form of a wet air filtering device according to an embodiment of the present invention.
4 is a cross-sectional view schematically illustrating a form of an intake watertight part of a wet air filtering device according to an embodiment of the present invention.
5 is a cross-sectional view schematically showing one form of a discharge watertight part of a wet air filtering device according to an embodiment of the present invention.
6 is a conceptual diagram illustrating a behavior of a watertight part of a wet air filtering device according to an embodiment of the present invention.

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 will be embodied 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.

Hereinafter, a wet air filtering device according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6 . In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted so as not to obscure the gist of the present invention.

1 is a perspective view schematically showing a form of a wet air filtration device according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view schematically showing a form of a wet air filtration device according to an embodiment of the present invention. , FIG. 3 is a cross-sectional view schematically showing a form of a wet air filtering device according to an embodiment of the present invention, and FIG. 4 is a schematic view of a form of an intake watertight part of the wet air filtering device according to an embodiment of the present invention. 5 is a cross-sectional view schematically showing a form of a discharge watertight part of the wet air filtering device according to an embodiment of the present invention, and FIG. 6 is a watertight part of the wet air filtering device according to an embodiment of the present invention. It is a conceptual diagram showing the behavior of a droplet.

1 to 3 , the wet air filtering device 1 may include a housing 10 , a spray unit 20 , and a watertight unit 30 . The housing 10 includes an internal space in which polluted air is purified, and may have a polyhedral shape. The housing 10 has a hexahedral shape in which a pair of mutually opposing surfaces are penetrated, and contaminated air may be introduced from one through-surface and purified air may be discharged from the other through-surface.

The housing 10 may include a frame-shaped connection part 11 protruding to the outside of the housing 10 along the edge of the penetrated surface. The connection part 11 is a pair, formed at both ends of the housing 10 , and connected to the coupling parts 12 and 56 , respectively, to fix the watertight part 30 to the housing 10 .

A sensor 13 may be installed inside the housing 10 . The sensor 13 may measure the degree of internal contamination of the housing 10 , the amount of introduced polluted air, the amount of discharged purified air, and the like. For example, the sensor 13 may measure the concentration of fine dust, ozone, mold, bacteria, harmful gases, organic/inorganic substances, etc. in the polluted air introduced into the housing 10 . The driving of the injection unit 20 or the ventilation unit 50 may be controlled according to the measured value measured by the sensor 13 .

The spray unit 20 may be installed on the upper portion of the housing 10 to supply the washing water W to the inside of the housing 10 . In this case, since the spray unit 20 sprays the washing water (W) above the contaminated air introduced into the housing 10, the washing water (W) falls vertically due to gravity and efficiently pollutants (P) can capture The washing water W may be condensed with the contaminants P while rotating at a constant speed inside the housing 10 . The pollutant (P) may be fine dust in the air, ozone, mold, bacteria, harmful gases, organic/inorganic substances, harmful gases, and the like. The washing water W in which the contaminant P is captured may move to the lower portion of the housing 10 in the state of the contaminant droplet L, and the contaminant droplet L is drained to the outside of the housing 10, or the water tank ( 40) can be moved.

The spraying unit 20 is of a spray spray type, and a spray nozzle (not shown) is positioned outside the upper portion of the housing 10 and cleaned into the inside of the housing 10 through a through hole (not shown) formed in the housing 10 . Water W may be sprayed, and the spray nozzle may be located inside the housing 10 . The washing water W sprayed from the spray unit 20 may have a mass of 1 to 20 μg. The spraying unit 20 may spray the washing water W while rotating, including a rotation driving device (not shown). The spray unit 20 can spray the washing water (W) supplied at a pressure of 6 bar or more to the housing 10, and the washing water (W) and pollutants (P) with positive pressure inside the housing 10 generated while spraying. ) by increasing the contact force between the contaminants (P) can be easily collected, thereby increasing the purification efficiency.

The spray unit 20 may be connected to the water tank 40 , and the water tank 40 may accommodate the washing water W therein and supply the washing water W to the spray unit 20 . The water tank 40 is located outside the housing 10 , and may include a pump 41 , a separation unit 42 , and a connection pipe 43 .

The pump 41 may control the spray amount of the washing water W supplied from the water tank 40 to the spray unit 20 . The pump 41 may adjust the pressure at which the injection unit 20 sprays the washing water W, and the pressure may be 6 bar or more.

One side of the pump 41 may be connected to the injection unit 20 through the connection pipe 43 , and the other side may be connected to the water tank 40 through the connection pipe 43 . The pump 41 may adjust the spray amount of the washing water W supplied to the spray unit 20 according to the contamination level sensed value inside the housing 10 measured by the sensor 13 . For example, when the contamination level measurement value inside the housing 10 is higher than a preset value, the pump 41 increases the pumping speed or pumping pressure to increase the spray amount of the washing water W supplied to the spray unit 20 . can

The separation unit 42 may be installed in the water tank 40 to collect the contaminant droplets L formed inside the housing 10 . The separation unit 42 may separate the contaminant droplet L into the contaminant P and the washing water W. For example, the separation unit 42 is a filter material such as fabric, paper, glass fiber, etc., a non-woven fabric, a HEPA (High Efficiency Particulate Air Filter, HEPA) filter manufactured by compressing glass fiber, an activated carbon filter, etc. can be separated into contaminants (P) and washing water (W). In addition, the separator 42 may remove the contaminant P from the contaminant droplet L by using a chemical material such as a chlorine-based chemical.

The separation unit 42 may separate the contaminant droplet L into the contaminant P and the washing water W or remove the contaminant P from the contaminant droplet L. The washing water W obtained from the contaminant droplets L collected in the separation unit 42 may move to the spray unit 20 and be circulated while being sprayed back into the housing 10 . In this case, since the washing water W collecting the pollutants P can be filtered and reused several times, the maintenance cost of the wet air filtering device 1 can be reduced.

The watertight part 30 may be located at both ends of the housing 10 . The watertight part 30 may be positioned on a pair of opposing surfaces of the housing 10 . The watertight part 30 may seal moisture such as washing water W or contaminated droplets L inside the housing 10 . The watertight part 30 induces an increase in the size of the droplet to prevent the washing water W or the contaminated droplet L sprayed on the housing 10 from escaping to the outside of the housing 10 while inducing the washing water W or the contaminated droplet (L) can be sealed to protect the components outside the housing 10 from moisture.

The watertight part 30 includes an intake watertight part 31 through which contaminated air flows into the inside of the housing 10 and a discharge watertight part 32 through which air purified from the housing 10 is discharged to the outside of the housing 10 . may include The intake watertight part 31 and the exhaust watertight part 32 may be positioned at both ends of the housing 10 and face each other.

The intake watertight part 31 may be installed on one side of the housing 10 . The intake watertight part 31 may be connected to the housing 10 by a method such as coupling, insertion, or bonding. For example, the intake watertight part 31 is fixed to the housing 10 by fastening in a state in which the edge of one side is in contact with the connection part 11 and the edge of the other side is in contact with the frame-shaped coupling part 12. can In this case, mutually opposed through-holes may be formed in the intake water-tight portion 31 , the connection portion 11 , and the coupling portion 12 , respectively, and the intake water-tight portion while screws, coupling pins, etc. are inserted into the through holes, respectively. (31), the connecting portion 11, the coupling portion 12 can be coupled. In addition, the intake water tight part 31 may be inserted into a groove formed in the connection part 11 , or may be connected to the housing 10 by adhesion to the connection part 11 , a male-female structure, or the like.

The discharge watertight part 32 may be installed on the other side of the housing 10 . The discharge watertight part 32 may be connected to the housing 10 by a method such as coupling, insertion, or bonding. For example, in the discharge watertight part 32, one side edge abuts the connection part 11, and the edge of the other side contacts the coupling part 56 formed in the case cover 55 by fastening the housing 10. can be fixed to In this case, mutually opposing through-holes may be formed in the discharge watertight part 32, the connection part 11, and the coupling part 56, respectively, and a screw, a coupling pin, etc. are inserted into the through-holes, respectively, and the discharge watertight part 32 ), the connection part 11 and the coupling part 56 can be combined. In addition, the discharge watertight part 32 may be inserted into a groove formed in the connection part 11 , or may be connected to the housing 10 by adhesion to the connection part 11 , a male-female structure, or the like.

The ventilation unit 50 is connected to one side of the discharge watertight unit 32 and may discharge air purified from the inside of the housing 10 to the outside of the housing 10 . The ventilation unit 50 may include a blowing fan 51 , a motor 53 , a fan case 54 , and a case cover 55 .

The case cover 55 may include a frame-shaped coupling portion 56 protruding outward of the case cover 55 along the edge and a circular-shaped through hole 58 . One side of the case cover 55 may be coupled to the housing 10 through the coupling portion 56 , and the other side may be coupled to the fan case 54 . In this case, the rib 57 may be inserted into the through hole 58 .

A motor 53 , a motor cover 52 , and a blowing fan 51 may be coupled to the fan case 54 . A rib-shaped rib 57 arranged in a circle may be formed in the fan case 54 , and the motor 53 may be seated in the central portion of the rib 57 . The motor cover 52 may be positioned to surround the outside of the motor 53 in a state in which the motor 53 is seated on the fan case 54 . The rib 57 and the motor cover 52 may be heat sinks for lowering the heat generated by the motor 53 .

The blowing fan 51 is formed of a plurality of blades (not shown), and may generate wind while rotating by driving the motor 53 . The blowing force generated by the blowing fan 51 may guide the air purified in the housing 10 to the outside of the housing 10 . The blowing power of the blowing fan 51 may be adjusted according to sensing values of the amount of polluted air entering the housing 10 and the amount of exhaust purified air measured by the sensor 13 . For example, when the amount of air discharged to the outside of the housing 10 is smaller than a preset value than the amount of air introduced into the housing 10, the rotation speed of the blower fan 51 is increased to smoothly induce the discharge flow of purified air can be controlled to

Hereinafter, the watertight part 30 of the wet air filtering device 1 of the present invention will be described in more detail with reference to FIGS. 4 to 6 .

4 to 6, the watertight part 30 includes an intake watertight part 31 and a discharge watertight part 32, and the intake watertight part 31 and the exhaust watertight part 32 each have a plurality of meshes. (mesh) plates may be included. The mesh pattern of the mesh plate may include various shapes such as square, rectangle, rhombus, hexagon, etc., and may be coated with an antibacterial material to have antibacterial and anticorrosive effects.

The intake watertight part 31 may include a plurality of mesh plates 31a, 31b, and 31c having different mesh sizes d1, d2, and d3. Here, the meaning of the size of the mesh can be defined as a vertical length, a horizontal length, a diagonal length, or a cross-sectional area for one grid pattern, and when viewed as a whole, it means that it can be recognized as the size of an empty space forming the mesh at a glance, , are all used in the present invention with the same meaning. The first mesh plate 31a, the second mesh plate 31b, and the third mesh plate 31c may be positioned on one side of the housing 10 in a state in close contact with each other.

A plurality of mesh plates (31a, 31b, 31c) may have a larger mesh size toward the outside in the inner space of the housing (10). The mesh size d1 of the first mesh plate 31a is smaller than the mesh size d2 of the second mesh plate 31b, and the mesh size d2 of the second mesh plate 31b is the third mesh plate ( 31c) may be smaller than the mesh size d3. That is, the first mesh plate 31a closest to the inner space of the housing 10 has a relatively small mesh size and is dense, and the third mesh plate 31c furthest from the inner space of the housing 10 has a relatively small mesh size. can be formed large.

The mesh size of the plurality of mesh plates 31a, 31b, and 31c may be gradually increased along the outer direction with respect to the inner space of the housing 10 . Washing water (W) or contaminated droplets (L) is in contact with the first mesh plate (31a), the second mesh plate (31b), and the third mesh plate (31c) in turn while the washing water (W) or contaminated droplets (L) can be induced to increase the size of the droplet by increasing the cohesive force between them.

The washing water W or the contamination droplet L inside the housing 10 first contacts the first mesh plate 31a, and is primarily spread by surface tension with the first mesh plate 31a. Then, the washing water (W) or the contaminated droplet (L) is in contact with the second mesh plate 31b and the third mesh plate 31c, which have a relatively larger mesh size than the first mesh plate 31a, a hydrophilic film phenomenon occurs. The contact cross-sectional area is widened in all directions, and the size can be increased.

Since the mesh plates 32a, 32b, and 32c of different sizes can be positioned with mesh patterns overlapping therebetween, a hydrophilic film phenomenon is generated for the washing water (W) or the contaminated droplet (L) to generate the washing water (W) ) or to increase the size of the contamination droplet (L).

The washing water W in the form of a droplet having a relatively large droplet size is in contact with the dense first mesh plate 31a and may be preferentially watertight so as not to leak to the outside of the housing 10 . In addition, even if the washing water molecules smaller than the mesh size of the first mesh plate 31a pass through the first mesh plate 31a, a hydrophilic film is formed between the mesh plates 31b and 31c that are in close contact with each other to remove small washing water molecules. Inducing the washing water (W') in the form of water droplets having a relatively large particle size, the washing water (W') may fall to the lower part of the housing 10 by gravity.

That is, the mesh plates 31a, 31b, 31c can efficiently form a hydrophilic film phenomenon to increase the size of the washing water (W) or the contaminated droplets (L) sprayed on the housing 10, and the cleaning is increased in the form of water droplets. Since the water W or the contaminant droplet L is collected by falling to the lower part of the housing 10 , it is possible to prevent water leakage to the outside of the housing 10 in advance by sealing water at the source. In addition, since the washing water W or the contaminated droplet L, which has an increased size and contact cross-sectional area, has a faster falling speed, the purification efficiency of the overall wet air filtering device 1 can also be increased.

Since the mesh plate 31a is in direct contact with the washing water W or the contamination droplet L inside the housing 10, any one of copper (Cu), tin (Sn), or silver (Ag) having high antibacterial properties It may be coated with more than one material. In this case, it is possible to prevent in advance the propagation of bacteria on the surface of the mesh plate 31a, which may be caused by droplets, and to have an antibacterial effect and to prevent corrosion.

The discharge watertight part 32 may include a plurality of mesh plates 32a, 32b, and 32c having different mesh sizes d4, d5, and d6. The fourth mesh plate 32a , the fifth mesh plate 32b , and the sixth mesh plate 32c may be positioned on the other side of the housing 10 in a state in close contact with each other.

A plurality of mesh plates (32a, 32b, 32c) may have a larger mesh size toward the outside in the inner space of the housing (10). The mesh size d4 of the fourth mesh plate 32a is smaller than the mesh size d5 of the fifth mesh plate 32b, and the mesh size d5 of the fifth mesh plate 32b is the sixth mesh plate ( 32c) may be smaller than the mesh size d6. That is, the mesh plate 32a closest to the inner space of the housing 10 has a relatively small mesh size and is dense, and the mesh plate 32c furthest from the inner space of the housing 10 has a relatively large mesh size. have.

The mesh size of the plurality of mesh plates 32a, 32b, and 32c may be gradually increased along the outward direction based on the inner space of the housing 10 . Accordingly, when the washing water (W) or the contamination droplet (L) is in contact with the plurality of mesh plates (32a, 32b, 32c), the washing water (W) or the contamination droplet (L) sprayed according to the mesh size that gradually increases The cohesive force of the liver may be increased and the size of the droplet may also be induced to increase.

The washing water W or the contamination droplet L inside the housing 10 first contacts the fourth mesh plate 32a, and is primarily spread by surface tension with the fourth mesh plate 32a. Then, the washing water W or the contamination droplet L comes into contact with the fifth mesh plate 32b and the sixth mesh plate 32c to generate surface tension, and spreads in all directions to generate a hydrophilic film phenomenon, so that the washing water (W) or contaminant droplets (L) can be induced to increase in size.

The washing water W in the form of a droplet having a relatively large droplet size is in contact with the fourth mesh plate 32a and may be preferentially watertight so as not to leak to the outside of the housing 10 . When the washing water molecules smaller than the mesh size of the fourth mesh plate 32a pass through the fourth mesh plate 32a, a hydrophilic film is formed between the mesh plates 32b and 32c having different mesh sizes, so that the particle size is relatively small. It is formed of the washing water W' in the form of a large water droplet, so that the washing water W' may fall to the lower part of the housing 10 by gravity. Accordingly, the mesh plates 32a, 32b, and 32c may seal moisture inside the housing 10, and the air purified in the housing 10 may be discharged from the housing 10 through the mesh.

The discharge watertight part 32 stably forms a water film between the washing water (W) or the contaminated droplet (L) and the mesh plate (32a, 32b, 32c) through the multiple structure of the mesh plate (32a, 32b, 32c) while forming a liquid By inducing the enemy to widen the size and contact cross-sectional area, as the particle size of the washing water W becomes larger than the mesh size of the mesh plate, the washing water W is collected at the lower side of the housing 10 and leaks to the outside of the housing 10 can be prevented from becoming

In addition, the discharge watertight part 32 uses a plurality of mesh plates 32a , 32b , 32c whose mesh size gradually increases from the inner space of the housing 10 to the outside, and the negative pressure is generated by the blowing force of the ventilation unit 50 . Even if this occurs, the size of the washing water W or the contaminated droplet L can be gradually increased to induce it to fall, so that moisture can be efficiently sealed and the purified air can be smoothly discharged.

Since the mesh plate 32a is in direct contact with the washing water W or the contamination droplet L inside the housing 10, any one of copper (Cu), tin (Sn), or silver (Ag) having high antibacterial properties It can be coated with the above materials to prevent corrosion and increase antibacterial properties.

The mesh plate (31a, 31b, 31c) of the intake watertight part 31 and the mesh plate (32a, 32b, 32c) of the exhaust watertight part 32 are a plurality of multiple structures and may be arranged in various numbers of three or more as needed. have.

In summary, the intake watertight part 31 and the exhaust watertight part 32 are hydrophilic by using a plurality of mesh plates of different sizes, respectively, to increase the contact cross-sectional area of the washing water (W) or the contaminated droplet (L) inside the housing 10 The film is formed, and the size of the droplet is increased so that the washing water W or the contaminated droplet L can smoothly fall to the lower part of the housing 10 . Accordingly, it is possible to fundamentally block water from leaking to the outside of the housing 10 from the form of water droplets having a relatively large size to the washing water W of small particles.

The wet air filtration device 1 sprays washing water (W) on the polluted air introduced into the housing 10 from the outside to collect pollutants (P) contained in the polluted air, and forms purified air to only the purified air. The filtration efficiency is increased by discharging to the outside, and moisture is sealed through the watertight structure of the watertight part 30 and only clean air is discharged to the outside, thereby protecting the components outside the housing from moisture.

Although preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the

10: housing
11: Connection
12: coupling part
13: sensor
20: injection unit
30: watertight part
31: intake water tight part
32: discharge water tight part
40: tank
41: pump
42: separation part
43: connector
50: ventilation
51: blow fan
53: motor
56: coupling part
W: washing water
P: pollutant
L: contamination droplet

Claims (5)

a housing comprising an interior space for purifying polluted air;
A spraying unit for spraying washing water into the housing, and
Water-tight parts located at both ends of the housing, on the surface through which the housing is penetrated, and sealing the washing water inside the housing;
including,
The watertight part includes an intake watertight part located on one side of the housing, through which contaminated air flows into the housing, and an exhaust watertight part located on the other side of the housing and discharged to the outside of the housing,
The intake water-tight portion and the discharge water-tight portion include a plurality of mesh plates,
The mesh size of the plurality of mesh plates is different from each other, characterized in that the size of the mesh increases toward the outside in the inner space of the housing,
The plurality of mesh plates are located in close contact with each other,
A wet air filtering device in which the mesh patterns of the plurality of mesh plates overlap each other. delete delete According to claim 1,
The watertight part, wet air filtering device, characterized in that the surface in contact with the inner space of the housing is coated with any one or more of copper (Cu), tin (Sn) and silver (Ag) material. According to claim 1,
a water tank located outside the housing and receiving the washing water and supplying the washing water to the spraying part;
One side of the pump is connected to the injection unit and the other side is connected to the water tank to control the amount of washing water supplied to the injection unit, and
A ventilation unit located at one side of the watertight unit and discharging air purified from the inside of the housing to the outside of the housing
Wet air filtration device further comprising a.

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