AIR CLEANER

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of and priority to Korean Patent Application No. 10-2024-0077106, filed in Korea on Jun. 13, 2024, the entire disclosure(s) of which is hereby incorporated herein by reference in its entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present disclosure relates to an air cleaner, and more particularly, to an air cleaner having stacked air purification modules.

2. Description of the Related Art

An air cleaner is a device that reduces dust and bacteria in air in a certain space by filtering and discharging the air within that space. The air cleaner filters out foreign substances through the air flow of the space and discharges air from which foreign substances have been removed.

In the air cleaner, in order to quickly increase the cleanliness of an indoor space, a discharge port is formed toward the upper side, and filtered air discharged toward the upper side can flow in all directions.

In addition, when forming the discharge port on the upper side, a separate fan for wind direction control can be disposed on the upper side to send filtered air over a long distance.

Additionally, research is being conducted on an air cleaner configured with multiple stages by stacking blowers vertically.

Korean Patent Publication No. KR10-2022-0083719 and Korean Patent Publication No. KR10-2017-0140578 disclose air cleaners in which blowers are disposed in a vertical direction to filter a large amount of air.

The air cleaners in the above-described Patent Documents have a problem in that the control module is divided into upper and lower parts, and a filter pressing plate is disposed above the control module of each stage, which increases the height of the product.

In addition, as the performance of air cleaners improves and the functions provided by air cleaners diversify, the number of circuit boards and sensors accommodated in the control module tends to increase and the size tends to increase, and the sizes of the control module and air cleaner product may become larger.

In addition, when moisture penetrates inside the control module containing various circuit components, it may cause malfunctions and safety hazards such as electric leakage.

SUMMARY OF THE INVENTION

An object of the present disclosure is to provide an air cleaner capable of reducing the product height by sharing control modules of air purification modules.

Another object of the present disclosure is to provide an air cleaner capable of reducing the product size by effectively disposing the substrate inside the control module.

Still another object of the present disclosure is to provide an air cleaner that can effectively drain water when water flows into the control module, thereby improving reliability.

Still another object of the present disclosure is to provide an air cleaner capable of simplifying the length and wiring structure of wires connected to light sources.

Still another object of the present disclosure is to provide a miniaturized air cleaner that prevents return wind without adding a structure such as a partition plate.

Still another object of the present disclosure is to provide an air cleaner capable of improving air purification performance by preventing discharged clean air from being re-inflowed.

An air cleaner according to an embodiment of the present disclosure can reduce a product height and size by disposing and sharing a control module between air purification modules.

An air cleaner according to an embodiment of the present disclosure can have a plurality of substrates inside the control module, and can reduce the product size by disposing the substrates spaced apart from each other in an up-down direction.

An air cleaner according to an embodiment of the present disclosure can prevent a malfunction even when water flows into the control module by forming a drain hole at a lower portion of the control module and forming a drain structure in a plate supporting the substrate.

An air cleaner according to an embodiment of the present disclosure can prevent return wind and improve air purification performance by stacking an air purification module that discharges clean air upward and an air purification module that discharges clean air downward.

According to one embodiment of the present disclosure, there is provided an air cleaner including: a case having an intake port formed on a peripheral surface; a first air purification module including a first blower fan disposed inside the case and a first filter for removing foreign substances in air flowing into the intake port; a second air purification module including a second blower fan disposed inside the case and a second filter for removing foreign substances in air flowing into the intake port; and, a control module disposed between the first air purification module and the second air purification module, in which the control module includes an upper cover, a lower cover, a substrate accommodated in an internal space formed by coupling the upper cover and lower cover, and a plate supporting the substrate from below, a drain hole is formed in the lower cover, and the plate includes a drain guide for guiding water flowing into the control module to the drain hole. Therefore, it is possible to protect the internal substrate and components even when water flows into the control module.

The lower cover may include a base having an open center and a lower filter pressing plate disposed at the center of the base, and the drain hole may be formed in the base.

The lower cover may further include a lower seating portion including an inclined surface that guides water passing through the drain guide to the drain hole, and thus, it is possible to effectively perform the drain.

The lower cover may include a first inclined surface whose part is positioned on one side of the drain guide, a first flat surface extending outward from a lower end of the first inclined surface, and a second inclined surface extending from the first flat surface.

The first flat surface may be positioned below an outlet of the drain guide.

The lower cover may include a second flat surface positioned between the second inclined surface and the drain hole.

The lower cover may further include left and right baffles in contact with the first inclined surface, the first flat surface, the second inclined surface, and the second flat surface.

The drain guide may include an upper guide having an inlet formed at an upper end, and a lower guide having an outlet formed at a lower end.

The lower guide may include a section in which an opening area gradually decreases toward a lower side.

The upper cover may include a channel guide whose part is inserted into the drain guide.

The upper cover may include a body having an open center and an upper filter pressing plate positioned at the center of the body, and the channel guide may be formed in the body.

The channel guide may include a first guide extending downward from the body, and second and third guides extending outward from the first guide.

The second and third guides may have different shapes.

The second air purification module may be disposed above the first air purification module, a first discharge port may be formed at a lower end of the first air purification module, and a second discharge port may be formed at an upper end of the second air purification module.

The control module may include a plurality of sensors, and a stand on which the plurality of sensors are mounted, and the stand may be connected to an upper side of the plate.

According to at least one of the embodiments of the present disclosure, a product height and size can be reduced by disposing and sharing the control module between the first air purification module and the second air purification module.

According to at least one of the embodiments of the present disclosure, the substrate inside the control module can be effectively disposed to reduce the product size.

According to at least one of the embodiments of the present disclosure, the control module includes the upper cover, the lower cover, the substrate accommodated in the internal space formed by coupling the upper cover and the lower cover, and the plate supporting the substrate from below, thereby enabling efficient disposition of internal components.

According to at least one of the embodiments of the present disclosure, a first substrate seating portion which protrudes upward from the plate and to which a first substrate is fixed and a second substrate seating portion which protrudes upward from the plate and to which a second substrate is fixed may be provided, the first substrate is disposed spaced apart from an upper side of the second substrate, thereby enabling implementation of various functions without significant constraints of the substrates, and reducing the size of the control module and the air cleaner product.

According to at least one of the embodiments of the present disclosure, the drain hole is formed in the lower cover, and the plate includes the drain guide that guides water flowing into the control module to the drain hole, thereby enabling effective drain when water flows into the inside of the control module.

According to at least one of the embodiments of the present disclosure, the first discharge port formed at the lower end and the second discharge port formed at the upper end are provided, and air from which foreign substances have been removed is discharged downward through the first discharge port at the lower end and upward through the second discharge port at the upper end, thereby preventing return wind.

According to at least one of the embodiments of the present disclosure, by disposing the first air purification module that discharges clean air to the lower end at the lower side and the second air purification module that discharges the clean air to the upper end at the upper side, air discharged from the first air purification module can be prevented from flowing into the second air purification module, thereby improving air purification performance.

Effects of the present disclosure 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.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of an air cleaner according to one embodiment of the present disclosure.

FIG. 2 is a cross-sectional view of the air cleaner according to one embodiment of the present disclosure.

FIG. 3 is a view illustrating airflow in the air cleaner according to one embodiment of the present disclosure.

FIG. 4 is an exploded view of the air cleaner according to one embodiment of the present disclosure.

FIG. 5 is an assembly view of a control module according to one embodiment of the present disclosure.

FIG. 6 is an exploded top view of the control module according to one embodiment of the present disclosure.

FIGS. 7 and 8 are exploded views of the control module according to one embodiment of the present disclosure.

FIGS. 9 to 14 are views for reference in a description of a substrate disposition structure of the control module according to an embodiment of the present disclosure.

FIGS. 15 to 20 are views for reference in a description of a drain structure of the control module according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings. However, the present disclosure is not limited to these embodiments and may of course be modified in various forms.

In the drawings, parts that are not related to the description are omitted in order to clearly and concisely explain the present disclosure, and the same drawing reference numerals are used for identical or extremely similar parts throughout the specification.

Meanwhile, the suffixes “module” and “portion” used for components in the following description are given simply for the convenience of writing the present specification, and do not in themselves have any particularly important meaning or role. Accordingly, the “module” and “portion” may be used interchangeably.

Additionally, in the present specification, terms such as first, second, or the like may be used to describe various elements, but these elements are not limited by these terms. These terms are used only to distinguish one element from another.

FIG. 1 is a perspective view of an air cleaner according to one embodiment of the present disclosure. FIG. 2 is a cross-sectional view of the air cleaner according to one embodiment of the present disclosure, and FIG. 3 is a view illustrating airflow in the air cleaner according to one embodiment of the present disclosure. FIG. 4 is an exploded view of the air cleaner according to one embodiment of the present disclosure.

Referring to FIGS. 1 to 4, an air cleaner 1 includes a case 10 forming an exterior. The case 10 has intake ports 11a and 12a formed on the peripheral surface so that air can be sucked in from various directions. Based on a vertical center line passing through the inner center of the case 10, air can be sucked in from 360 degrees. A plurality of intake ports 11a and 12a are formed spaced apart from each other in the circumferential direction. The plurality of intake ports 11a and 12a are evenly formed in the circumferential direction along the peripheral surface of the case 10 so that air can be sucked in from any direction based on the case 10.

Meanwhile, in the present specification, an up-down direction or vertical direction is defined as an axial direction. The axial direction can correspond to the central axis direction of blower fans 140 and 240 described later, that is, the motor axis direction of the fan. Moreover, a radial direction or horizontal direction may be understood as a direction perpendicular to the axial direction. Moreover, the circumferential direction may be understood as a virtual circle direction formed when rotating with the axial direction as the center and the radial distance as the rotation radius.

The air cleaner 1 includes air purification modules 100 and 200 that generates air flow. The air purification modules 100 and 200 includes blower fans 140 and 240 disposed inside the case 10 and filters 120 and 220 that removes foreign substances in the air flowing in through the intake ports 11a and 12a.

Air flowing into the intake ports 11a and 12a can pass through the filters 120 and 220. The filters 120 and 220 is provided in a cylindrical shape and may have a filter surface for filtering air.

The case 10 may have a cylindrical shape. The case 10 may include a first case 11 having a semi-cylindrical shape and covering a portion of the outer peripheral surface of the air purification modules 100 and 200, and a second case 12 having a semi-cylindrical shape and covering the remaining portion of the outer peripheral surface of the air purification modules 100 and 200.

Alternatively, the case 10 may have a conical shape (a truncated cone shape), and the first case 11 and the second case 12 may each have a semi-conical shape.

The first case 11 and the second case 12 may be coupled to form the exterior of the air cleaner 1. The first case 11 covers the front surface of the air cleaner 1 and may be named a “front case” or “front cover”. The second case 12 covers the rear surface of the air cleaner 1 and may be named a “rear case” or “rear cover”.

The intake ports 11a and 12a include a first intake port 11a formed in the first case 11 and a second intake port 12a formed in the second case 12. The intake ports 11a and 12a connect the inside and the outside of the case 10. A plurality of intake ports 11a and 12a are formed. The case 10 may form the plurality of intake ports 11a and 12a on the peripheral surface of the case 10.

The plurality of intake ports 11a and 12a are evenly formed in the circumferential direction along the outer peripheral surface of the case 10 so that air can be sucked in from any direction based on the case 10.

The plurality of intake ports 11a and 12a are formed in a stripe shape extending vertically. Alternatively, the plurality of intake ports 11a and 12a may be formed by perforating in a circular or oval shape.

In this way, since the case 10 is configured in a cylindrical shape and the plurality of intake ports 11a and 12a are formed along the outer peripheral surface of the case 10, the amount of air suction can increase.

Meanwhile, referring to FIGS. 1 to 4, the air purification modules 100 and 200 includes a first air purification module 100 and a second air purification module 200 disposed in the up-down direction.

For example, the second air purification module 200 may be disposed above the first air purification module 100. Since the first air purification module 100 is disposed at the lower portion of the air cleaner 1, the first air purification module 100 may be called a “lower air purification module” or “lower module,” and since the second air purification module 200 is disposed at the upper portion of the air cleaner 1, the second air purification module 200 may be called an “upper air purification module” or “upper module.

The first air purification module 100 and the second air purification module 200 include the blower fans 140 and 240 and the filters 120 and 220 that removes foreign substances in the air flowing in through the intake ports 11a and 12a, respectively.

The first air purification module 100 includes a first blower fan 140 and a first filter 120 that removes foreign substances in the air flowing into the intake port. In addition, the first air purification module 100 further includes a first motor 130 that rotates the first blower fan 140.

The second air purification module 200 includes a second blower fan 240 and a second filter 220 that removes foreign substances in the air flowing into the intake port. In addition, the second air purification module 200 further includes a second motor 230 that rotates the second blower fan 240.

Meanwhile, the air purification modules 100 and 200 include a first discharge port 110a formed at the lower end and a second discharge port 210a formed at the upper end. The first discharge port 110a is formed below the first blower fan 140 and the first filter 120. The second discharge port 210a is formed above the second blower fan 240 and the second filter 220. Air from which foreign substances have been removed in the filters 120 and 220 is discharged downward through the first discharge port 110a and upward through the second discharge port 210a.

When the second air purification module 200 is disposed above the first air purification module 100, the first discharge port 110a is formed at the lower end of the first air purification module 100, and the second discharge port 210a is formed at the upper end of the second air purification module 200.

In addition, a lower discharge grill 110 including a plurality of grills and for guiding the lower airflow is disposed at the lower end of the first air purification module 100. In addition, an upper discharge grill 210 including a plurality of grills and for guiding the upper airflow is disposed at the upper end of the second air purification module 200.

The upper discharge grill 210 may include a cylindrical inner wall 211 and a cylindrical outer wall 212. The plurality of grills of the upper discharge grill 210 may connect the inner wall 211 and the outer wall 212 and may be disposed in a radial structure.

The lower discharge grill 110 may include a plurality of grills having a concentric circle structure. The plurality of grills may be a plurality of circles each having the same center and different radii. The plurality of grills may include a section bent outward in the radial direction. The lower discharge grill 110 may include a plurality of grills bent outward at a predetermined angle. The lower discharge grill 110 may be disposed at the discharge port 110a to transmit downward discharge airflow laterally.

A bottom plate 170 is disposed below the first air purification module 100. The bottom plate 170 is disposed to be in contact with the ground and supports the air purification modules 100 and 200.

On the upper surface of the bottom plate 170, a channel guide 170a is disposed to guide air discharged downward through the first discharge port 110a laterally. The bottom plate 170 may further include a base 170b that supports the channel guide 170a. The channel guide 170a may be formed on the upper surface of the base 170b. In addition, the channel guide 170a and the base 170b may be coupled to form the bottom plate 170.

Air from which foreign substances have been removed in the first filter 120 is discharged downward through the first discharge port 110a. Air from which foreign substances have been removed in the second filter 220 is discharged upward through the second discharge port 210a.

According to the present disclosure, even when two air purification modules are stacked in the up-down direction, air is not discharged from the lower air purification module to the upper side. Accordingly, by forming the intake ports 11a and 12a on the peripheral surface of the case 10, the suction performance can be improved, while preventing the air discharged from the air purification module disposed on the lower side from being re-introduced into the air purification module disposed on the upper side.

Conventional two-stage air cleaners have a problem in that the discharge airflow of the lower air purification module is configured to be directed upward, which reduces the air purification performance due to re-intake of the purified airflow. In the present disclosure, the discharge airflow direction of the lower air purification module is changed to downward to prevent the return wind and improve the air purification performance.

In addition, according to the present disclosure, since the air cleaner 1 product does not have a mechanical structure for preventing the return wind and a configuration for discharge, the product can be made more compact and the degree of design freedom, such as the disposition of internal parts, can be improved.

For example, by positioning a control module 400 at the center of the product of the air cleaner 1, the length of the power and signal wires and the connection structure can be made more efficient, and the overall product height can be reduced. In addition, by controlling the air purification modules 100 and 200 with the single integrated control module 400 positioned between the air purification modules 100 and 200, the air purification modules 100 and 200 do not each have a control module, so the overall product height can be reduced.

Meanwhile, the particle size of general allergen substances is on the order of 3 to 100 μm, and since the allergen substances are larger than fine dust, the allergen substances tend to settle to the bottom. Accordingly, the airflow for floating the allergen particles and capturing the allergen particles with the filters 120 and 220 can be implemented by the lower airflow discharged downward by the first air purification module 100. Therefore, the allergen substances causing allergies can be effectively removed through the lower airflow discharged downward by the first air purification module 100.

Meanwhile, the air cleaner 1 may be equipped with a UVC LED (see 481 and 482 in FIG. 7) that outputs ultraviolet rays in a wavelength band that has a sterilizing effect on bacteria, mold, and microorganisms, and an ionizer (not illustrated) that eliminates bacteria and mold by passing electricity inside the case 10.

Meanwhile, the air purification modules 100 and 200 includes fan housings 145 and 245 that accommodates the blower fans 140 and 240, and a plurality of support portions 150 and 250 that extend vertically from the fan housings 145 and 245. The plurality of support portions 150 and 250 may extend in the length direction of the product of the air cleaner 1. The number of support portions 150 and 250 may vary depending on the model size and specifications. In addition, some of the support portions 150 and 250 may be configured differently from the rest in at least one of shape, size, and material.

At least one side of a plurality of support portions 150 and 250 may be provided with wire covers 155 and 255 covering the support portions 150 and 250. The support portions 150 and 250 and the wire covers 155 and 255 may be spaced apart from each other to form a space in which wires, or the like may be disposed.

In addition, the air purification modules 100 and 200 may further include wire covers 115 and 215 in which wires, or the like can be disposed. The motors 130 and 230 may be accommodated in motor fastening portions 125 and 225, respectively.

The air purification modules 100 and 200 include filter mounting portions 160 and 260 on which filters 120 and 220 are mounted, and the control module 400 is disposed between the filter mounting portions 160 and 260.

Net steels 165 and 265 are disposed between the filters 120 and 220 and the blower fans 140 and 240 to prevent a body or other objects from entering the space where the blower fans 140 and 240 is disposed.

Meanwhile, an upper cover 270 is disposed on the upper end of the coupled case 10. The upper discharge grill 210 is disposed inside the upper cover 270.

Meanwhile, a booster module 300 that controls the wind direction of air discharged through the second discharge port 210a may be disposed above the air purification modules 100 and 200. The booster module 300 that changes the discharge direction of the airflow generated from the second air purification module 200 may be disposed above the second air purification module 200.

The booster module 300 can send the air discharged from the second air purification module 200 to a longer distance. In addition, the booster module 300 can blend the airflow while rotating left and right and form various airflows. According to an embodiment, the booster module 300 can also move in the up and down direction to form more diverse airflows.

The booster module 300 can be detachably mounted on the upper end of the second air purification module 200. In addition, a contact power structure is applied to the booster module 300 and the second air purification module 200, so that when mounted, power can be supplied from the second air purification module 200 to the booster module 300.

When cleaning of parts inside the booster module 300, such as the booster fan 330, is required, or when cleaning of the upper discharge grill 210 at the upper end of the second air purification module 200 is required, the hygiene aspect can be enhanced by separating and managing the booster module 300.

The booster module 300 includes an outer cover 320, an inner grill 355 disposed inside the outer cover 320 and having a discharge port formed therein, a rear suction grill 311 having an intake port formed therein, the booster fan 330 disposed on the front surface of the rear suction grill 311 and disposed inside the inner grill 355, and a motor 340 that rotates the booster fan 330.

The rear suction grill 311 may be a part of a rear cover 310 forming the exterior of the rear surface of the booster module 300. Alternatively, the rear suction grill 311 may be provided separately and coupled with the rear cover 310.

The rear cover 310 may have an opening formed through which a part of the upper end of a booster neck 360 passes. In addition, the rear cover 310 may be coupled to the booster neck 360 by a predetermined fastening member.

The booster module 300 is supported by a booster neck 360 and may be mounted on the second air purification module 200.

The booster module 300 may be provided to be movable. The booster module 300 may be in an inclined, erected state or in a lying state, as illustrated in FIG. 1.

The booster module 300 further includes a display panel 390 disposed on the front surface of the booster fan 330. The display panel 390 may cover the entire front surface of the booster fan 330. The motor 340 may be disposed inside the booster fan 330.

The booster fan 330 may be a sirocco fan. Although a swash fan is applied to discharge airflow through the front grill, the sirocco fan may discharge airflow through the inner grill 355 on the side surface. Accordingly, the display panel 390 may be disposed on the front surface of the fan to cover the fan structure. In addition, the sirocco fan has the advantage of reducing noise compared to the swash fan.

In addition, the booster module 300 further includes an internal channel guide 350 that is disposed between the outer cover 320 and the inner grill 355 and changes the flow direction of air discharged through the discharge port 355a of the inner grill 355.

A slit 351 is formed between the inner channel guide 350 and the display panel 390. Air discharged through the discharge port 355a of the inner grill 355 passes through the slit 351 and is discharged from the booster module 300.

FIG. 5 is an assembly view of the control module according to one embodiment of the present disclosure. FIG. 6 is an exploded top view of the control module according to one embodiment of the present disclosure, and FIGS. 7 and 8 are exploded views of the control module according to one embodiment of the present disclosure.

Referring to FIGS. 5 to 8, an upper cover 410 and a lower cover 420 are positioned between the first air purification module 100 and the second air purification module 200. The upper cover 410 and the lower cover 420 are coupled to form the exterior of the control module 400.

The control module 400 may be positioned between the first air purification module 100 and the second air purification module 200. The control module 400 may be positioned above the first air purification module 100 and below the second air purification module 200.

Since the control module 400 is disposed in the middle of the first air purification module 100 and the second air purification module 200, the length and deviation of the wiring connecting the control module 400 and the first and second air purification modules 100 can be minimized, and the wiring structure can be simplified.

Various substrates and components are disposed in the internal space formed by coupling the upper cover 410 and the lower cover 420.

For example, a main printed circuit board (PCB) 430 on which circuits such as a controller that controls the overall operation of the air cleaner 1 are mounted is accommodated in the internal space formed by coupling the upper cover 410 and the lower cover 420.

In addition, the upper cover 410 and the lower cover 420 have an open center, and an upper filter pressing plate 440 and a lower filter pressing plate 450 are disposed in the open center, respectively.

The lower filter pressing plate 450 is positioned above the first filter 120 and may support the first filter 120 from the upper side. The upper filter pressing plate 440 is positioned below the second filter 220 and may support the second filter 220 from the lower side.

Since the filter pressing plate 440 and 450 is integrated with the upper and lower covers 410 and 420, vibration and noise can be further reduced and manufacturing costs can be reduced.

The upper filter pressing plate 440 may form the upper end of the upper cover 410. The second filter 220 may be seated on the upper surface of the upper filter pressing plate 440. The lower filter pressing plate 450 may form the lower end of the lower cover 420. The first filter 120 may be seated on the lower surface of the lower filter pressing plate 450. The upper filter pressing plate 440 and the lower filter pressing plate 450 may have an overall disc shape.

The upper filter pressing plate 440 may include an upper coupling portion 445 protruding downward from the inner surface. A plurality of upper coupling portions 445 may be provided. The plurality of upper coupling portions 445 may be spaced apart from each other in the circumferential direction of the upper filter pressing plate 440 and may be adjacent to the edge of the upper filter pressing plate 440.

The lower filter pressing plate 450 may include a lower coupling portion 455 protruding upward from the inner surface. A plurality of lower coupling portions 455 may be provided. The plurality of lower coupling portions 455 may be spaced apart from each other in the circumferential direction of the lower filter pressing plate 450 and may be adjacent to the edge of the lower filter pressing plate 450.

Each of the upper filter pressing plate 440 and the lower filter pressing plate 450 may be connected to a plurality of springs 435. The lower filter pressing plate 450 may have a first spring 435a connected to the upper side, and the upper filter pressing plate 440 may have a second spring 435b connected to the lower side.

The first spring 435a may be wound around the outer peripheral surface of the lower coupling portion 455. The second spring 435b may be wound around the outer peripheral surface of the upper coupling portion 445.

The upper cover 410 may include a body 411 having an open center and an upper seating portion 415 formed to be recessed downward from the upper surface of the body 411. The upper seating portion 415 may also have an open center. An upper coupling groove 416 may be formed in the upper seating portion 415 to be coupled with the upper coupling portion 445. The upper coupling portion 445 and the second spring 435b may be inserted into the upper coupling groove 416. The second spring 435b may be positioned between the upper coupling groove 416 and the upper coupling portion 445.

The lower cover 420 may include a base 421 having an open center and a guide 422 protruding upward from the base 421. When the lower cover 420 is coupled with the upper cover 410, the guide 422 is inserted inside the upper cover 410, and the base 421 may support the guide 422 and the upper cover 410 from the lower side. A coupling member 423 protruding upward may be formed on the base 421. The coupling member 423 may be coupled with a coupling member (not illustrated) of the upper cover 410.

The lower cover 420 may include a lower seating portion 425 formed to be recessed upward from the lower surface of the base 421. The lower seating portion 425 may also have an open center. A lower coupling groove 426 may be formed in the lower seating portion 425 to be coupled with a lower coupling portion 455. The lower coupling portion 455 and the first spring 435a may be inserted into the lower coupling groove 426. The first spring 435a may be positioned between the lower coupling groove 426 and the lower coupling portion 455.

According to an embodiment, the upper coupling portion 445 and the lower coupling portion 455 may be coupled with a fastening member (not illustrated) such as a screw. For example, screw threads may be formed on the inner peripheral surface of each of the upper coupling groove 416 and the lower coupling groove 426.

When the first filter 120 is mounted on the first filter mounting portion 160 of the first air purification module 100, the first filter 120 presses the lower filter pressing plate 450. When pressure is applied to the lower filter pressing plate 450, the first spring 435a may be compressed, and the lower filter pressing plate 450 may rise toward the lower seating portion 425. This rising of the lower filter pressing plate 450 may be limited by contact with the lower seating portion 425. The first filter 120 may be better supported by the elasticity of the first spring 435a.

When no pressure is applied to the lower filter pressing plate 450, the first spring 435a may be elastically restored, and the lower filter pressing plate 450 may move away from the lower seating portion 425. This descent of the lower filter pressing plate 450 may be limited by contact between the fastening member (or a separate stopper (not illustrated)) and the lower seating portion 425.

When the second filter 220 is mounted on the second filter mounting portion 260 of the second air purification module 200, the second filter 220 presses the upper filter pressing plate 440. When pressure is applied to the upper filter pressing plate 440, the second spring 435b may be compressed, and the upper filter pressing plate 440 may descend toward the upper seating portion 415. This descent of the upper filter pressing plate 440 may be limited by contact with the upper seating portion 415. The second filter 220 may be better supported by the elasticity of the second spring 435b.

When no pressure is applied to the lower filter pressing plate 450, the second spring 435b may be elastically restored, and the upper filter pressing plate 440 may move away from the upper seating portion 415. This rising of the upper filter pressing plate 440 may be limited by the contact between the fastening member (or a separate stopper (not illustrated)) and the upper seating portion 415.

The upper filter pressing plate 440 may include an upper protrusion 449 that protrudes downward. When the second filter 220 is mounted on the second filter mounting portion 260 of the second air purification module 200, the upper filter pressing plate 440 is lowered. As the upper filter pressing plate 440 is lowered, the upper protrusion 449 may press a switch (not illustrated) or a mechanism (not illustrated) connected to the switch disposed downward. Accordingly, a signal corresponding to information that the second filter 220 is mounted may be transmitted from the switch to a main PCB 430.

The lower filter pressing plate 450 may include a lower protrusion 459 that protrudes upward. When the first filter 120 is mounted on the first filter mounting portion 160 of the first air purification module 100, the lower filter pressing plate 450 rises. As the lower filter pressing plate 450 rises, the lower protrusion 459 may press a switch (not illustrated) or a mechanism (not illustrated) connected to the switch disposed downward. Accordingly, a signal corresponding to information that the first filter 120 is mounted may be transmitted from the switch to the main PCB 430.

Inside the control module 400, light source boards 481 and 482 are accommodated, on which light sources for sterilizing the filters 120 and 220 are mounted. The light source boards 481 and 482 further include an upper light source board 481 that is positioned below the second filter 220 and includes an upper light source that emits ultraviolet light upward, and a lower light source board 482 that is positioned above the first filter 120 and includes a lower light source that emits ultraviolet light downward.

In addition, the light source of the light source boards 481 and 482 may be an LED. The light source may be a UVC LED that irradiates ultraviolet light of the UVC band. Typically, ultraviolet light may be subdivided according to the length of the wavelength. For example, ultraviolet light may be divided into UVA with a wavelength of 320 to 400 nm, UVB with a wavelength of 280 to 320 nm, and UVC with a wavelength of 200 to 280 nm. In particular, UVC, which is a short-wavelength ultraviolet ray, has the characteristic of destroying the DNA of bacteria and causing a chemical reaction with a specific substance, and is therefore effective for sterilization.

The upper light source board 481 may be referred to as an upper UVC LED 481 including a UVC LED that emits ultraviolet light in the UVC band. The lower light source board 482 may be referred to as a lower UVC LED 482 including a UVC LED that irradiates ultraviolet light in the UVC band. The upper UVC LED 481 outputs UVC light upward toward the second air purification module 200 and the second filter 220. The lower UVC LED 482 outputs UVC light downward toward the first air purification module 100 and the first filter 120.

The upper filter pressing plate 440 and the lower filter pressing plate 450 may be formed with holes 491 through which ultraviolet light passes. A recessed portion 492 may be formed to be recessed downward from the upper surface of the upper filter pressing plate 440. In addition, the recessed portion 492 may be formed to be recessed upward from the lower surface of the lower filter pressing plate 450. For example, the recessed portion 492 may be positioned at the center of the upper filter pressing plate 440 and the lower filter pressing plate 450. The hole 491 may be formed by penetrating the recessed portion 492 in the up-down direction. For example, the hole 491 may be formed at the center of the recessed portion 492.

In addition, each of the upper filter pressing plate 440 and the lower filter pressing plate 450 may include a plurality of ribs 493 that protrude inwardly in which the main PCB 430 is accommodated. The plurality of ribs 493 may be adjacent to the recessed portion 492. The plurality of ribs 493 may be spaced apart from or in contact with each other in the circumferential direction of the recessed portion 492. The plurality of ribs 493 may fix the upper UVC LED 481 and the lower UVC LED 482.

The control module 400 may include a plurality of sensors 471, 472, and 473 and a mounting portion 460. The mounting portion 460 may support the main PCB 430.

In addition, various sensors such as an LED sensor 471, a laser sensor 472, and a gas sensor 473 may be mounted on the mounting portion 460. The LED sensor 471 may sense the amount of dust by emitting infrared LED light and detecting the light scattered by dust. The laser sensor 472 may detect the amount of dust using laser light. The gas sensor 473 may detect the amount of gas in the air.

Although the LED sensor 471, the laser sensor 472, and the gas sensor 473 are exemplified in FIGS. 7 and 8, the present disclosure is not limited thereto, and the types and combinations of sensors provided may vary. In addition, one or more communication modules (not illustrated), such as Wi-Fi, may be provided inside the control module 400.

Meanwhile, the control module 400 may have different sensors and modules depending on the model. In this case, the mounting portion 460 may be shared. For example, even in the case of a model that does not have a laser sensor 472, the mounting portion 460 may include a structure in which the laser sensor 472 can be mounted so that the mounting portion 460 can be used in the same way as other models.

Meanwhile, the mounting portion 460 may include a plate 461 that supports the main PCB 430 and a stand 462 on which the plurality of sensors 471, 472, and 473 are mounted. A rib 469 that secures the main PCB 430 may be disposed in the plate 461.

The stand 462 may include mounting portions 467 and 463 for at least some of the plurality of sensors 471, 472, and 473. For example, a first mounting portion 467 may be formed with a fastening hole 467a so that the first sensor (for example, LED sensor 471) may be coupled to the first mounting portion 467 through a fastening member such as a screw. For example, a second mounting portion 463 may be formed with a plurality of locking protrusions 464 so as to fix the second sensor (for example, gas sensor 473).

Meanwhile, some of the plurality of sensors 471, 472, and 473 may be provided with a sensor cover 465. The sensor cover 465 may be disposed in front of a first sensor (for example, an LED sensor 471). A first sensor hole 466 is formed in the sensor cover 465, so that air may flow through the first sensor hole 466.

On the side surface of the body 411, a second sensor hole 412 corresponding to a second sensor (for example, a gas sensor 473) is formed, so that air can flow through the second sensor hole 412.

Meanwhile, a cover accommodating portion 413 to which the sensor cover 465 is coupled may be formed on the side surface of the body 411. A plurality of openings 414a and 414b may be formed in the cover accommodating portion 413 corresponding to the sensor cover 465 and the sensor 471. For example, a third sensor hole 414a corresponding to the first sensor hole 466 may be formed in the cover accommodating portion 413. In addition, a lens hole 414b corresponding to a lens 471a of the LED sensor 471 may be formed in the cover accommodating portion 413.

The mounting portion 460 may further include a first coupling portion 468a coupled with the upper cover 410 and a second coupling portion 468b coupled with the lower cover 420. The first coupling portion 468a may be coupled with the third coupling portion 418 of the upper cover 410. For example, the first coupling portion 468a may include a locking protrusion and may be coupled with a locking groove of the third coupling portion 418. The second coupling portion 468b may be coupled with a fourth coupling portion 428 of the lower cover 420.

A first fastening portion 419 that is fastened to the support portion 250 of the second air purification module 200 may be formed on the side surface of the body 411. The support portion 250 may extend downward from the second fan housing 245 and may be fastened to a fastening hole of the first fastening portion 419 through a fastening member such as a screw.

A second fastening portion 429 that is fastened to the support portion 150 of the first air purification module 100 may be formed on the side surface of the base 421. The support portion 150 may extend upward from the first fan housing 145 and may be fastened to the fastening hole of the second fastening portion 429 through a fastening member such as a screw.

FIGS. 9 to 14 are views for reference in the description of the substrate disposition structure of the control module according to an embodiment of the present disclosure. FIGS. 9 to 14 are views illustrating internal components and the disposition structure in a state where the upper cover 410 of the control module removed.

FIGS. 9 and 10 are internal perspective views of the control module, FIG. 11 is an internal plan view of the control module, and FIG. 12 is an internal cross-sectional view of the control module.

FIG. 13 is an internal plan view of the control module with the first upper substrate removed, and FIG. 14 is a perspective view of the inside of the control module with the first upper substrate removed.

Below, the internal components and disposition structure of the control module are described in detail with reference to FIGS. 9 to 14.

A plurality of substrates 430, 431, 432, and 433 are accommodated inside the control module 400. Various components of the control module 400 are accommodated in the internal space formed by coupling the upper cover 410 and the lower cover 420. For example, for the operation of the product of the air cleaner 1, a main PCB, a power PCB, a sensor (dust sensor, gas sensor, or the like), a communication module (for example, Wi-Fi modem), a speaker module, a voice module, or the like may be fixed to the injection part-mounting portion 460.

The mounting portion 460 may be manufactured by injection molding, and it is preferable to mold the plurality of PCB mounting structures at once.

Meanwhile, in order to diversify functions and sensing items, the size of the PCB that should be accommodated inside the control module 400 increases and placement is not easy. In addition, an additional fixing area is required to fix the main PCB in a given space.

According to the present disclosure, a laminated structure can be applied to assemble more PCB components 430, 431, 432, and 433 into one injection part (plate 461). At this time, the PCB components 430, 431, 432, and 433 may be disposed spaced apart from each other in the up-down direction.

The plurality of substrates 430, 431, 432, and 433 may include the first substrate 430 on the upper side and a second substrates 431, 432, and 433 on the lower side. The first substrate 430 may be disposed to be spaced apart above from the second substrates 431, 432, and 433. The second substrates 431, 432, and 433 may be mounted on a first stage P1, and the first substrate 430 may be disposed on a second stage P2 that is higher than the first stage P1. The first substrate 430 and the second substrates 431, 432, and 433 may be disposed to be spaced apart from each other in the up-down direction.

By dividing and disposing a plurality of substrates 430, 431, 432, and 433 into multiple layers, the area required for fixing can be reduced compared to the case where multiple substrates 430, 431, 432, and 433 are distributed and disposed on the same layer. In addition, there is a space between the spaced first substrate 430 and second substrates 431, 432, and 433, which also has an advantage in terms of heat dissipation.

The area of the first substrate 430 may be larger than the areas of the second substrates 431, 432, and 433. In addition, the plurality of second substrates 431, 432, and 433 may be provided. When the plurality of substrates 431, 432, and 433 are disposed on the upper side, the power lines and signal lines connected to the substrates 431, 432, and 433 all extend to the upper side, so the wiring structure becomes complicated and long. When a small number of large substrates 430 are disposed on the upper side, the number and length of lines that should be extended upward and connected may be reduced. Therefore, the wiring structure can be simplified by disposing the relatively large first substrate 430 on the upper side and disposing the plurality of small second substrates 431, 432, and 433 on the lower side.

The first substrate 430 may be the main PCB 430 described above. The number and type of the second substrates 431, 432, and 433 may be configured in various ways according to the function and specifications of the air cleaner 1. For example, the 2-1 substrate 431 may be a voice module PCB. The 2-2 substrate 432 may be a speaker module PCB. The 2-3 substrate 433 may be a Wi-Fi modem PCB.

Additionally, the second substrates 431, 432, and 433 may be disposed spaced apart from each other. For example, the second substrates 431, 432, and 433 may be disposed spaced apart from each other in the second stage P2.

According to an embodiment, the control module 400 may further include a cover protecting each of the substrates 430, 431, and 433, and the shape of the cover may correspond to the shape of the substrate to be protected. In the case of a substrate with a cover, the cover may be fixed to the plate 361 in a state where the cover is present.

The plurality of sensors 471, 472, and 473 are mounted on a stand 462. The stand 462 may be connected to the upper side of the plate 461. For example, the stand 462 may be disposed on the upper outer side of the plate 461, so that the plurality of sensors 471, 472, and 473 may be mounted more easily.

The plate 461 of the mounting portion 460 may support the plurality of substrates 430, 431, 432, and 433 from below.

The control module 400 may include a first substrate seating portion 910 which protrudes upward from the plate 461 and to which the first substrate 430 is fixed, and a second substrate seating portion 920 which protrudes upward from the plate 461 and to which the second substrates 431, 432, and 433 are fixed.

The first substrate seating portion 910 may include a plurality of pillars 439 protruding upward from the plate 461 and coupling holes 438 formed on the upper surfaces of the plurality of pillars 439. For example, four first substrate seating portions 910 may be provided corresponding to the corners of the first substrate 430. A fastening member (not illustrated), such as a screw, may be fastened to the coupling hole 430a formed at the corner of the first substrate 430 and the coupling hole 438 of the first substrate seating portion 910.

The pillar 439 may be formed in a cylindrical shape or a structure having an inclined surface. Preferably, the pillar 439 may be formed in a structure that is wide at the lower side and narrow at the upper side to stably support the first substrate 430.

The positions of the plurality of pillars 439 may be determined so as not to interfere with surrounding components and PCB harness connections. In addition, some of the plurality of pillars 439 may have different shapes from those of the remaining pillars. For example, the pillar around which a component, a wire, or the like is positioned may be formed with a structure in which a part of the pillar is cut off, thereby minimizing the possibility of interference.

Meanwhile, the longitudinal height of the pillar 439 determines the height of the second stage P2. In the case where the pillar 439 is formed by protruding from the base 361b, the longitudinal height of the pillar 439 becomes the height of the second stage P2.

At least some of the plurality of pillars 439 may include a fixed rib 437 protruding upward. The fixed ribs 437 for fixing the first substrate 430 may be formed on the upper surfaces of at least some of the plurality of pillars 439. The fixed rib 437 may protrude upward from the outer side of the coupling hole 438 to support the corner of the first substrate 430 from the side surface.

According to an embodiment, in addition to the first substrate seating portion 910 positioned corresponding to the corner of the first substrate 430, a structure for more stably fixing the first substrate 430 may be further included. For example, the rib 469 described above may be further positioned on the plate 461.

The second substrate seating portion 920 may include a plurality of ribs 431a, 432a, and 433a protruding upward. The ribs 431a, 432a, and 433a may support the second substrates 431, 432, and 433 from the side surface.

The second substrate seating portion 920 may include a variety of coupling structures.

For example, the second substrate seating portion 920 may include a plurality of pillars 431b and 432b protruding upward, and a coupling hole (not illustrated) may be formed on the upper surfaces of the pillars 431b and 432b. A fastening member 431 such as a screw may be fastened to a coupling hole (not illustrated) formed in the 2-1 substrate 431 and the coupling hole of the second substrate seating portion 920. In addition, a fastening member 432c such as a screw may be fastened to a coupling hole (not illustrated) formed in the 2-2 substrate 432 and a coupling hole of the second substrate seating portion 920.

The pillars 431b and 432b may be formed in a cylindrical shape or a structure having an inclined surface. Preferably, the pillars 431b and 432b are formed in a structure in which the lower part is wide and the upper part is narrow, so as to stably support the 2-1 substrate 431 and the 2-2 substrate 432.

For substrates where screw fastening is inadequate or inefficient, other fixing structures may be utilized. For example, the second substrate seating portion 920 may include a first part 433b that fixes one side of the 2-3 substrate 433, and a second part 433c that extends from some of the plurality of ribs 433a to the 2-3 substrate 433.

The first part 433b and the second part 433c may restrict the vertical flow of the 2-3 substrate 433. Meanwhile, the first part 433b and/or the second part 433c may be implemented with an elastic material. For example, the first part 433b can be elastically deformed to protrude so as to contact the upper end of the 2-3 substrate 433 and support the 2-3 substrate 433 by pressing the 2-3 substrate 433 from above.

Meanwhile, the plate 461 may include a recessed portion 461a formed to be recessed downward. The second substrate seating portion 920 may be formed in the recessed portion 461a. The second substrate seating portion 920 may be formed by protruding upward from the recessed portion 461a.

The ribs 431a, 432a, and 433a may protrude upward from the recessed portion 461a. In addition, the plurality of pillars 431b and 432b may also protrude upward.

When the depth of the recessed portion 461a is too large, the assembly workability of the second substrates 431, 432, and 432 may be deteriorated. When the depth of the recessed portion 461a is too small, the distance between the first substrate 430 and the second substrates 431, 432, and 433 may be shortened. The depth of the recessed portion 461a may be smaller than the vertical length of the first substrate seating portion 910. The vertical length of the first substrate seating portion 910 may be larger than the depth of the recessed portion 461a. That is, the recessed portion 461a may be formed smaller than the height of the pillar 439.

The first stage P1 may be formed in the recessed portion 461a. In this case, the difference between the longitudinal heights of the pillars 431b and 432b and the recessed portion 461a becomes the height of the first stage P1. The second stage P2 may be formed in the base 461b around the recessed portion 461a. Since the longitudinal height of the pillar 439 becomes the height of the second stage P2, the depth of the recessed portion 461a is added to the height difference between the pillars 431b and 432b and the pillar 439, thereby determining the distance between the first substrate 430 and the second substrates 431, 432, and 433.

As the recessed portion 461a is formed, the overall height of the control module 400 can be reduced while making the height difference between the first stage P1 and the second stage P2 larger, and a sufficient separation distance can be secured between the first substrate 430 and the second substrates 431, 432, and 433.

Meanwhile, at least one 432 of the second substrates 431, 432, and 433 may overlap the first substrate 430 when viewed from above.

At least some 431 and 433 of the second substrates 431, 432, and 433 may partially overlap the first substrate 430 when viewed from above. In this case, heat generated in the substrate 431 and 433 may be dissipated more quickly.

Meanwhile, the upper cover 410 and the lower cover 420 are each opened in the center. The upper filter pressing plate 440 is disposed in the opened center of the upper cover 410 and can support the second filter 220 from below. The lower filter pressing plate 450 is disposed in the opened center of the lower cover 420 and can support the second filter 220 from the upper side of the first filter 120.

Due to customer negligence, moisture may penetrate into the control module 400. For example, during cleaning of the inside of the air cleaner 1 or replacement of the filter, moisture may penetrate through a gap that occurs when parts are coupled. Alternatively, due to customer negligence, moisture may penetrate around the upper filter pressing plate 440 that can be pressed by elastic force. Various substrates and electrical components are accommodated inside the control module 400, and when moisture penetrates, a malfunction may occur and there is also a possibility of a safety accident.

According to the present disclosure, the plate 461 may further include a drain guide 490 for discharging water flowing into the control module 400 to the outside.

FIGS. 15 to 20 are views for reference in the description of the drain structure of the control module according to an embodiment of the present disclosure.

FIG. 15 is a bottom view of the control module, and FIG. 16 is a cross-sectional view taken along line A-A of FIG. 15. FIG. 17 is an enlarged cross-sectional view of the drain structure of the control module.

FIG. 18 is an exploded perspective view of the control module, illustrating the drain structure. FIG. 19 is an enlarged view of the drain structure of the upper cover, and FIG. 20 is an enlarged view of the drain structure of the lower cover.

Below, the drain structure of the control module is described in detail with reference to FIGS. 15 to 20.

The control module 400 includes the upper cover 410, the lower cover 420, the substrate 430 accommodated in the internal space formed by the coupling of the upper cover 410 and the lower cover 420, and the plate 461 that supports the substrate 430 from blow.

In the past, a separate cover has been often used to protect the PCB from moisture infiltration. However, according to this method, when water enters the inside, the water may accumulate there and remain inside, which could damage the electrical components.

According to the present disclosure, the drain hole 424 is formed in the lower cover 420 to discharge water flowing into the control module 400.

The plate 461 includes the drain guide 490 that guides water flowing into the control module 400 to the drain hole 424.

Water flowing into the control module 400 can flow along the drain guide 490 and be discharged to the outside through the drain hole 424 without contacting dangerous internal parts such as the substrate 430.

The lower cover 420 includes the base 421 with an open center and the lower filter pressing plate 450 positioned at the center of the base 421. The drain hole 424 is formed in the base 421. The drain hole 424 may be formed on the inner side rather than an outermost line 421a of the base 421. The base 421 may be positioned to surround the lower filter pressing plate 450, and the drain hole 424 may be formed on one side of the outer portion of the base 421.

The lower cover 420 may include the lower seating portion 425 formed to be recessed to one side from the base 421. The lower seating portion 425 may also have an open center.

The lower seating portion 425 may include the inclined surface 425c that guides water passing through the drain guide 490 to the drain hole 424. The inclined surface 425c may form a slope from the bottom of the drain guide 490 to the drain hole 424.

Alternatively, the inclined surface 425c may be disposed in some sections from below the drain guide 490 to the drain hole 424.

For example, the lower cover 420 may include a first inclined surface 425a, a first flat surface 425b extending outward from a lower end of the first inclined surface 425a, and a second inclined surface 425c extending from the first flat surface 425b.

The first inclined surface 425a can be partially positioned on one side of the drain guide 490 to prevent water from flowing into the center of the control module 400.

The lower seating portion 425 may be formed with the lower coupling groove 426 into which the lower coupling portion 455 and the first spring 435a are inserted. When the first filter 120 is mounted on the first filter mounting portion 160, the first filter 120 presses the lower filter pressing plate 450. When pressure is applied to the lower filter pressing plate 450, the first spring 435a may be compressed, and the lower filter pressing plate 450 may rise toward the lower seating portion 425. This rising of the lower filter pressing plate 450 may be limited by contact with the lower seating portion 425.

It is preferable that the lower seating portion 425 include a flat surface to stably support the lower filter pressing plate 450 and limit the movement thereof. The first flat surface 425b may be positioned below the outlet 492a of the drain guide 490.

Meanwhile, the lower cover 420 may further include a second flat surface 425d positioned between the second inclined surface 425c and the drain hole 424.

The lower cover 420 may further include the first inclined surface 425a, the first flat surface 425b, the second inclined surface 425c, and left and right baffles 425e that contact the second flat surface 425d. The left and right baffles 425e may prevent water from flowing into a location other than the drain hole 424.

The drain guide 490 may be disposed on the outside of the plate 461 to prevent water from flowing into the center of the plate 461. The plate 461 may include the recessed portion 461a and the base 461b around the recessed portion 461a. The drain guide 490 may be formed on the base 461b.

The mounting portion 460 includes the plate 461 and the stand 462 on which the plurality of sensors 471, 472, and 473 are mounted. The stand 462 is connected to the upper outer portion of the plate 461, so that the plurality of sensors 471, 472, and 473 can be mounted more easily.

The drain guide 490 may be positioned between the recessed portion 461a and the stand 462. Accordingly, water can be prevented from flowing into the substrates 430, 431, and 433 inside the control module, and also from coming into contact with the sensor 471, 472, and 473 mounted on the outer stand 462.

The drain guide 490 may include an upper guide 491 having an inlet 491a formed at the upper end and a lower guide 492 having the outlet 492a formed at the lower end.

The lower guide 492 may include a section in which the opening area gradually decreases as it goes downward. Accordingly, water may flow better into the drain hole 424 without being accumulated.

The upper cover 410 may include a channel guide 417 that is partially inserted into the drain guide 490. The channel guide 417 may be formed to protrude downward from the upper cover 410.

The upper cover 410 may include a body 411 having an open center and an upper seating portion 415 formed to be recessed downward from the body 411. The upper filter pressing plate 440 may be disposed in the center of the body 411. The channel guide 417 may be formed in the body 411.

Additionally, the channel guide 417 may be partially inserted into the upper guide 491. The opening area of the channel guide 417 may be smaller than the opening area of the upper guide 491.

The channel guide 417 may include a first guide 417a extending downward from the body 411, and second and third guides 417b and 417c extending outward from the first guide 417a.

The second guide 417b and the third guide 417c may have different shapes. For example, the third guide 417c may have a step to avoid interference with other parts. In addition, the second guide 417b and the third guide 417c may have different areas.

The present disclosure proposes a moisture penetration prevention guide that can immediately discharge moisture to the outside when moisture penetrates from the upper portion of the control module 400 due to customer negligence.

Referring to a water movement path 1700, the structure is such that moisture flowing into the upper filter pressing plate 440 is guided through the channel guide 417, passes through the drain guide 490, moves to the drain hole 424, and then is discharged to the outside.

Although the preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above, and various modifications may be made by a person skilled in the art to which the present disclosure pertains without departing from the gist of the present disclosure as claimed in the claims, and such modifications should not be individually understood from the technical idea or prospect of the present disclosure.