KR20220029036A - Ventilation and Air Cleaning Apparatus - Google Patents

Abstract

A ventilation and purification device comprises: a housing having a rectangular space unit elongated toward a left side and a right side therein; and one pair of total heat exchanging elements respectively provided to a center portion of left and right space units when halving the rectangular space unit inside the housing into the left and right space units to divide the left and right space units inside the housing into quarters in upper, lower, left, and right portions to respectively divide first to fourth air flow passage chambers to (1-1)^th to (4-1)^th air flow passage chambers, and enabling each pair of air flow passage chambers in a diagonal direction among the first to fourth air flow passage chambers and the (1-1)^th to (4-1)^th air flow passage chambers to be connected to each other, to allow indoor and outdoor air to cross at an X-shape and exchange heat with each other when supplying and discharging the indoor and outdoor air through each pair of air flow passage chambers in the diagonal direction.

Description

Ventilation and Air Cleaning Apparatus

The present invention relates to a ventilation purifier, and more particularly, to a high-efficiency ventilation purifier having a space-efficient and compact design and heat exchange of indoor/outdoor air together.

A ventilation device is a device for exchanging indoor/outdoor air that exhausts indoor polluted air to the outdoors while supplying fresh outdoor air into the indoor space. Such a ventilation device is essential in order to maintain a pleasant indoor environment of a building. Ventilation devices are usually divided into natural ventilation or mechanical ventilation.

Ventilation devices in general buildings do not use separate power or energy, but allow ventilation through the openings of the building by the pressure caused by the temperature difference and wind pressure around the building. However, since it is difficult to secure a stable ventilation amount and create a comfortable indoor environment using only the natural ventilation method, a mechanical ventilation ventilation device that forcibly moves air using a mechanical device such as a ventilation fan is used in combination.

The mechanical ventilation type ventilation device is generally installed in addition to the air conditioning equipment installed on the wall or ceiling of the room to ventilate the indoor air. However, in the case of adding to the air conditioning equipment, there is a problem in that the scale of the entire air conditioning equipment increases, and furthermore, electricity consumption is increased in the ventilation operation mode.

In order to solve this problem, a stand-alone type ventilation device that can be installed separately from the air conditioning equipment has been proposed. As such a stand-alone type ventilation device, there is Korean Patent Registration No. 1921206 (hereinafter, 'prior art').

1 is a perspective view showing a conventional ventilation purifier.

As shown in Fig. 1, the conventional ventilation purifier has a main body casing 101, an exhaust port 102 for exhausting the bet to the outside, an intake port 103 for introducing the outside air into the room, and airs purified outside air or bet into the room. Intake port 105 to ventilate the bet, ventilation port 104 to suck in to ventilate the bet, filter 180, intake damper 107, ventilation damper 114, supply air damper 134, exhaust damper 136, emergency exhaust It includes a damper 174, a blowing fan 150, and the like.

The conventional ventilation purifier 100 is operated to perform individual functions by selecting one of a ventilation mode, an air cleaning mode, and an emergency exhaust mode by a single blowing fan 150 and a controller 190 .

Specifically, in the ventilation mode, outside air is introduced through the intake port 103 , and some air is discharged to the outside through the exhaust port 102 . When the exhaust hole 135 is sealed by the exhaust damper 136, outside air can be introduced together without discharging the bet. When the intake port 103 is closed by the intake damper 107 and the supply port 105 is closed by the supply air damper 134 , all of the bet air is discharged to the outside through the exhaust port 102 without introducing outside air.

In the air cleaning mode, the intake damper 107 closes the intake port 143 by the controller 190 , and the exhaust damper 136 also closes the exhaust hole 135 . The ventilation damper 114 opens the ventilation hole 113, the supply air damper 134 opens the air supply hole 133, and the bet introduced through the ventilation hole 104 passes through the filter 180 to the ventilation space 131 ) and flows into the room through the air inlet 105 . Through this, foreign substances contained in the bet are removed and supplied to the room without inflow of outside air or discharge of the bet.

On the other hand, in the emergency exhaust mode, the air supply damper 134 closes the air supply port 105 and the intake air damper 107 closes the intake port 103 by the controller 190 . The emergency discharge damper 174 opens the emergency discharge hole 173, and the bet moved to the intake space passes through the floor space 120 and the suction space 141 through the emergency discharge hole 173 to the blowing fan 150. moves to the ventilation space 131 by the The air in the ventilation space 131 moves to the exhaust space through the exhaust hole 135 and is discharged to the outside through the exhaust port 102 , and does not go through the filter 180 .

However, the ventilation purifier of the prior art needs to install all four air inlets and flow paths for each mode in order to select and operate the ventilation mode, the air cleaning mode, and the emergency exhaust mode. As a result, the device becomes larger and more complicated, and there is a hassle of individually performing filtering and ventilation of fine dust.

Korean Patent Registration No. 10-1921206 (Registered on November 16, 2018)

The present invention is to solve the problems of the prior art,

First, as the internal configuration of the ventilation device has a space-efficient and compact design, the ventilation device is small and light, so it is easy to move it anywhere on the indoor floor,

Second, it facilitates convection so that incoming outdoor air can spread quickly,

Third, it does not cause discomfort due to air exhaust to users located adjacent to it,

Fourth, it is intended to provide a ventilation purifier with high energy efficiency by simultaneously purifying air flowing in from the outdoors and exchanging heat between indoor/outdoor air at the same time as ventilation.

The ventilation purifier of the present invention for achieving this object may include a housing and a pair of total heat exchange elements.

The housing may have a rectangular space elongated from side to side therein.

A pair of total heat exchange elements are provided one at the center of the left and right spaces when the rectangular space inside the housing is divided into left and right spaces, respectively. It may be divided into a fourth air passage chamber and 1-1 to 4-1 air passage chambers, respectively. The pair of total heat exchange elements communicate with each other the pair of air passage chambers in the diagonal direction among the first to fourth air passage chambers and the 1-1 to 4-1 air passage chambers, so that indoor and outdoor air is provided in a diagonal direction. When supply and exhaust through a pair of air flow chambers, the indoor and outdoor air crosses in an X-shape to allow mutual heat exchange.

In the ventilation purifier of the present invention, each of the first to fourth air passage chambers and the first to fourth air passage chambers and the 1-1 to 4-1 air passage chambers, each of which is located at the lower inner side, passes through the rear surface of the housing through the air purification filter. The outdoor air intake may be communicated. Each air flow chamber located on the inside and the lower side communicates with the total heat exchange element in the diagonal direction. can do.

In the ventilation purifier of the present invention, each of the first to fourth air passage chambers and the 1-1 to 4-1 air passage chambers located at the lower outside of the air passage chamber communicates with the indoor air intake port formed on the side surface of the housing. can do. Each air flow chamber located on the outside and the lower side communicated through the total heat exchange element in the diagonal direction. can communicate

The ventilation purifier of the present invention may further include a guide member provided above the outdoor air blowing fan to guide the outdoor air to the central area.

In the ventilation purifier of the present invention, the air purifying filters are respectively detachably fitted and coupled to the slot grooves of the filter slot structure. The filter slot structure is provided in the center of the bottom surface inside the housing, and has a structure in which one end communicates with the outdoor air inlet and the other end is branched and opened toward the left and right air flow chambers.

In the ventilation cleaner of the present invention, an opening and closing door may be further provided on the front side of the housing adjacent to the filter slot structure. The air purifying filter can be easily replaced through the opening and closing door.

In the ventilation purifier of the present invention, the total heat exchange element has a hexahedral shape as a whole, but a plurality of spacers folded in a zigzag form so that indoor and outdoor air in the hexahedron shape can communicate while crossing vertically the air communication direction is vertical on the horizontal plane It may have a structure that is alternately stacked to do so. When viewed from the front, the total heat exchange element is inclined in a rhombic shape so that it can be fitted into the triangular groove slot provided on the inner surface of the space inside the housing, and each corner of the total heat exchange element is detachably fitted into the triangular groove slot do.

In the ventilation purifier of the present invention, the triangular groove slot is provided with two each on the upper and lower surfaces of the inner surface of the space inside the housing, one each on the left and right sides, and one each on the left and right sides of the upper end of the filter slot structure is integral a concavity is formed with

The ventilation purifier of the present invention may further include a carbon dioxide sensor for measuring the concentration of carbon dioxide in the indoor air on the upper surface of the housing. When the concentration of carbon dioxide in the indoor air rises above a certain level, an alarm can be generated.

The ventilation purifier of the present invention may further include a control panel for operating the device on the upper surface of the housing.

In the ventilation purifier of the present invention, when the concentration of carbon dioxide in the indoor air is increased by a certain level or more by the carbon dioxide sensor, the device can be automatically driven.

The ventilation purifier of the present invention having such a configuration has a compact design in which the internal configuration of the ventilation device is space-efficient as compared to the prior art, so that the ventilation device can be small and light. As a result, it is easy to move and arrange it anywhere on the floor surface of the room.

The ventilation purifier of the present invention is provided with a guide member for guiding the outdoor air to the center, so that the convection of the discharged outdoor air is facilitated and the outdoor air can be rapidly diffused into the room. In addition, due to the guide member, the user who is located adjacent to the front of the ventilation cleaner does not cause discomfort due to the discharge of outdoor air, and as a result, it is possible to increase the utilization of the space adjacent to the ventilation cleaner.

In addition, the ventilation purifier of the present invention can greatly improve energy efficiency by purifying air supplied from the outdoors and heat exchange of indoor/outdoor air at the same time as ventilation.

1 is a perspective view showing a conventional ventilation purifier.
2 is a front perspective view showing the ventilation cleaner of the present invention.
3 is a rear perspective view showing the ventilation cleaner of the present invention.
4 is an exploded perspective view of the ventilation purifier of the present invention.
5 is an operation state diagram illustrating a flow path through which indoor and outdoor air is supplied and exhausted in the ventilation purifier of the present invention.
6 is an exploded perspective view illustrating an enlarged area of the left outdoor air blowing fan of FIG. 5 .
7 is a view showing the process of replacing the air purification filter in the ventilation purifier of the present invention, (a) is a state in which the door is opened to replace the filter, (b) is a state in which the expired air purification filter is removed, ( c) shows the state in which replacement with a new filter has been completed, respectively.
8 is a schematic diagram showing a total heat exchange element in the ventilation purifier of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a front perspective view showing the ventilation cleaner of the present invention.

Referring to FIG. 2 , the ventilation purifier 200 of the present invention may include a housing 210 having a rectangular space elongated from side to side therein.

A pair of indoor air intake ports 211 for sucking in contaminated indoor air are respectively formed at the lower ends of the left and right sides of the housing 210 . A pair of outdoor air supply ports 212 for supplying fresh outdoor air into the room are respectively formed on the left and right sides of the upper surface of the housing 210 .

A carbon dioxide sensor 220 for measuring the concentration of carbon dioxide in the indoor air may be further provided on the upper surface of the housing 210 .

The carbon dioxide sensor 220 may generate an alarm by sound or light so that the user can know when the concentration of carbon dioxide in the indoor air is increased to a certain level or more.

When the carbon dioxide concentration in the indoor air is detected by the carbon dioxide sensor 220 above a certain level, the control unit (not shown) can automatically drive the ventilation purifier 200 , and on the contrary, when the carbon dioxide concentration is reduced below a certain level, the ventilation purifier It is possible to stop the operation of (200).

A control panel 230 for operating the ventilation purifier 200 may be provided on the upper right side of the housing 210 . The user may manually operate the ventilation purifier 200 through the control panel 230 or set it to be automatically controlled.

An opening/closing door 240 may be provided at the lower front end of the housing 210 . The air purification filter 282 inside the housing 210 to be described later can be easily replaced through the opening and closing door 240 .

3 is a rear perspective view showing the ventilation cleaner of the present invention.

Referring to FIG. 3 , an outdoor air inlet 214 for sucking in fresh outdoor air is provided at the lower rear end of the housing 210 . An indoor air exhaust port 213 for discharging contaminated indoor air to the outdoors is provided above the outdoor air intake port 214 . The indoor air exhaust port 213 and the outdoor air intake port 214 may communicate with the outdoors through a duct (not shown).

A power cable 250 for applying external power to the ventilation purifier 200 is provided on one rear side of the housing 210 .

4 is an exploded perspective view of the ventilation purifier of the present invention.

Referring to FIG. 4 , a pair of hexahedral total heat exchange elements 290 and 290-1 are inclined in a rhombic shape when viewed from the front of the housing 210 in the left and right space portions of the housing 210, respectively. inserted and mounted.

At this time, the pair of total heat exchange elements (290, 290-1) are a plurality of triangular groove slots (291, 292, 293, 294, 291-1, 292-1, 293) provided on the inner surface of the space of the housing (210). -1 and 294-1) are sandwiched between them. In detail, each edge of the total heat exchange element (290, 290-1) is fitted into the triangular groove slots (291, 292, 293, 294, 291-1, 292-1, 293-1, 294-1), respectively. and is coupled to the inside of the space of the housing 210 .

On the other hand, the triangular groove slots (291, 292, 293, 294, 291-1, 292-1, 293-1, 294-1) are each on the upper surface and the lower surface of the inner surface of the space inside the housing 210 ( 291, 293, 291-1, 293-1), one (292, 292-1) is provided on the left/right side, respectively, and one (294, 294-1) may be integrally formed with concavities.

5 is an operation state diagram illustrating a flow path through which indoor and outdoor air is supplied and exhausted in the ventilation purifier of the present invention.

Referring to FIG. 5 , the rectangular space inside the housing 210 is divided into left and right space parts C1, C2, C3, C4, C1-1, C2-1, C3-1, and C4-1.

A pair of total heat exchange elements 290 and 290-1 are provided in the center of the two divided left and right spaces C1, C2, C3, C4, C1-1, C2-1, C3-1, C4-1, respectively. inserted one by one.

At this time, each total heat exchange element (290, 290-1) is the housing 210 inside the left and right spaces (C1, C2, C3, C4, C1-1, C2-1, C3-1, C4-1) ) by dividing the upper and lower left and right again into four, the left and right spaces are first to fourth air passage chambers (C1 to C4), and 1-1 to 4-1 air passage chambers (C1-1 to C4-). It is divided into 4 parts of 1).

Accordingly, the first to fourth air passage chambers C1 to C4, and the 1-1 to 4-1 air passage chambers C1-1 to C4-1 are a pair of total heat exchange elements 290 and 290-1. ) to separate the space without communicating with each other, and maintain a closed state.

On the other hand, as described above, each of the four triangular groove slots 291, 292, 293, 294, 291-1, 292-1, 293-1, 294- 1) is provided, so that each corner of the total heat exchange elements 290 and 290-1 is provided in each of the triangular groove slots 291, 292, 293, 294 (291-1, 292-1, 293-1, 294-1). may be coupled while sliding in a state where they fit snugly. By the sliding and detachable configuration of these total heat exchange elements (290, 290-1), the user can replace the total heat exchange elements (290, 290-1) with new ones for maintenance between the operation of the ventilation purifier 200 of the present invention. When necessary, it can be easily replaced by opening the front of the housing 210 and then detaching the total heat exchange elements 290 and 290-1.

In addition, first to fourth air passage chambers C1 to C4 partitioned by a pair of total heat exchange elements 290 and 290-1, and 1-1 to 4-1 air passage chambers C1-1 to The outdoor air inlet 214 communicates with the third and third air passage chambers C3 and C3-1 located at the lower inside of C4-1) through the rear surface of the housing 210 . An air purification filter 282 is provided between the outdoor air intake port 214 and the third and third and third air passage chambers C3 and C3-1, respectively.

On the other hand, the third and third and third-first air passage chambers C3 and C3-1 and the first and 1-1 positioned at the upper side are communicated through the total heat exchange elements 290 and 290-1 in the diagonal direction. Outdoor air blowing fans 260 and 260-1 are provided in the air flow chambers C1 and C1-1, respectively, and the discharge ends of each of the outdoor air blowing fans 260 and 260-1 are connected to the housing 210. Each communicates with the outdoor air supply port 212 provided on the upper surface of the.

That is, fresh outdoor air sucked into the third and third air passage chambers C3 and C3-1 through the outdoor air intake 214 on the rear side of the housing 210 passes through the air purification filter 282 to remove fine dust. After the back is filtered, it is again moved to the first and 1-1 air passage chambers C1 and C1-1 through each of the total heat exchange elements 290 and 290-1.

The fresh outdoor air moved to the first and 1-1 air passage chambers C1 and C1-1 is brought into the room through the outdoor air supply port 212 by the outdoor air blowing fans 260 and 260-1. is finally supplied.

On the other hand, the first to fourth air passage chambers (C1 to C4), and the second and second located at the lower outside of the 1-1 to 4-1 air passage chambers (C1-1 to C4-1) -1 The air flow chambers C2 and C2-1 communicate with the indoor air intake 211 formed on the side surface of the housing 210 .

The second and 2-1 air passage chambers C2 and C2-1 are the fourth and 4-1 air passage chambers ( C4, C4-1) are communicated.

At this time, a single indoor air blowing fan 270 is provided in the fourth and 4-1 air passage chambers C4 and C4-1, and the discharge end of the indoor air blowing fan 270 is a housing 210 . It communicates with the indoor air exhaust port 213 provided on the rear surface of the .

That is, the contaminated indoor air sucked into the second and 2-1 air passage chambers C2 and C2-1 through the indoor air intake ports 211 on the left and right sides of the housing 210 is transferred to a pair of total heat exchange elements 290 . , 290-1) through the fourth and fourth air passage chambers C4 and C4-1, respectively, and then the indoor air exhaust port on the rear side of the housing 210 by a single indoor air blowing fan 270 (213) is finally exhausted to the outside.

In addition, guide members 261 and 261-1 are further provided on the upper ends of the left and right outdoor air blowing fans 260 and 260-1, respectively, and the guide members 261 and 261-1 are provided with left and right outdoor air supply It serves to guide the injection direction of the air inward so that the fresh air supplied through the mechanism 212 is injected from opposite directions. The fresh air guided to the central area by the guide members 261 and 261-1 passes through the left and right outdoor air supply ports 212 and collides at the middle point above the housing 210, then merges and rises upward. , the combined fresh air can then be moved laterally along the interior ceiling and rear wall of the building. As a result, convection and diffusion of fresh air supplied to the room may be facilitated. In addition, since the discharge of fresh air is not felt from the front of the housing 210 , even when the ventilation purifier of the present invention is installed on the floor of a living room, classroom, office, etc. It may not give any discomfort due to discharge.

6 is an exploded perspective view illustrating an enlarged area of the left outdoor air blowing fan of FIG. 5 .

As shown in FIG. 6 , a guide member 261 for guiding the air injection direction to the upper inner side of the housing is coupled to the upper discharge end of the left outdoor air blowing fan 260 .

The guide member 261 is provided with a plurality of airflow control plates 261a inclined inwardly above the housing 210 . As a result, the air injected through the outdoor air blowing fan 260 may be injected by changing the direction toward the inside of the housing 210 by the air flow control plate 261a.

7 is a view showing the process of replacing the air purification filter in the ventilation purifier of the present invention, (a) is a state in which the door is opened to replace the filter, (b) is a state in which the expired air purification filter is removed, ( c) shows the state in which replacement with a new filter has been completed, respectively.

Referring to FIG. 7 , the air purification filter 282 is detachably fitted into the slot grooves 281 (refer to FIG. 6b ) formed on both sides of the filter slot structure 280 installed in the center of the bottom surface inside the housing 210 to be detachably fitted, respectively. do.

At this time, one end of the filter slot structure 280 communicates with the outdoor air intake 214 and the other end branches toward the third and third and third air passage chambers C3 and C3-1 through the slot groove 281 . has a structure to be

Additionally, a mesh-type auxiliary filter 283 (refer to FIG. 6B ) may be inserted between the air purification filter 282 and the slot groove 281 to filter out large particles such as fiber dust.

Here, as described above in the description of FIG. 2 , as the opening and closing door 240 is further provided on the front side of the housing 210 adjacent to the filter slot structure 280 , the user opens the opening and closing door 240 and purifies the air. The filter 282 can be easily replaced.

8 is a schematic diagram showing a total heat exchange element in the ventilation purifier of the present invention.

Referring to FIG. 8 , the total heat exchange elements 290 and 290-1 have a hexahedral shape as a whole, and the interior of the hexahedral shape has a plurality of spacing members (292, 292-1) between the liner plate 291 specially processed. may have a structure in which the elements are stacked in a vertically intersecting zigzag structure.Through this configuration, the total heat exchange elements 290 and 290-1 can vertically cross the indoor and outdoor air, and as a result, a plurality of spacer members Electrical energy that can be consumed to cool or heat the outdoor air supplied from the outdoors to the indoor while continuously heat-exchanging the indoor and outdoor air that crosses the 292 and 292-1 through the spacing members 292 and 292-1. can reduce

As the liner plate 291 , a metal plate such as aluminum or copper having excellent thermal conductivity, a synthetic resin plate, or a specially processed cardboard with waterproof treatment may be used. As the spacer members 292 and 292-1, metal plates such as aluminum and copper having excellent thermal conductivity, synthetic resin plates, or generally used white paper can be used.

As described above, the present invention has a compact internal configuration that is small in size and light in size and has excellent energy efficiency, unlike the conventional fixed ventilation purifier installed attached to the air conditioning equipment of a building, so that it can be easily installed anywhere in the room. , the energy saving effect is excellent.

The present invention has been described above by way of Examples, which are merely for illustrating the present invention. Those skilled in the art will be able to change or modify these embodiments in other forms. However, since the scope of the present invention is defined by the claims below, such variations or modifications may be construed as being included in the scope of the present invention.

200: ventilation purifier 210: housing
211: indoor air inlet 212: outdoor air inlet
213: indoor air exhaust port 214: outdoor air intake
220: carbon dioxide sensor 230: control panel
240: opening and closing door 260: outdoor air blowing fan
261: guide member 261a: air flow regulating plate
270: indoor air blowing fan 280: filter slot structure
281: filter slot 282: air purification filter
290, 290-1: total heat exchange element 291 to 294-1: triangular groove slot
C1 to C4-1: first to 4-1 air passage chambers

Claims (7)

a housing having a rectangular space elongated from side to side therein; and
When the rectangular space inside the housing is divided into left and right spaces, one is provided at the center of the left and right spaces, and the first to fourth air passages are provided by dividing the left and right spaces inside the housing into four up, down, left and right. Each of the first to fourth air passage chambers and the 1-1 to 4-1 air passage chambers are divided into a chamber and 1-1 to 4-1 air passage chambers, respectively, a pair of air in a diagonal direction. A pair of total heat exchange elements that communicate with each other by communicating the flow path chambers so that when indoor and outdoor air is supplied and exhausted through each pair of air flow chambers in the diagonal direction, the indoor and outdoor air crosses in an X-shape to exchange heat with each other; , ventilation purifier. The method of claim 1,
Each of the first to fourth air flow chambers and the 1-1 to 4-1 air flow chambers located at the inner lower side communicates with the outdoor air intake port through the rear surface of the housing via the air purification filter, ,
Each air flow path chamber located at the inner lower side and each air flow path chamber located at the outer upper side communicated through the total heat exchange element in the diagonal direction through the outdoor air blowing fan, the outdoor air supply port provided on the upper surface of the housing; communicate,
Each of the first to fourth air flow chambers and the 1-1 to 4-1 air flow chambers located at the lower outer side communicates with an indoor air intake port formed on a side surface of the housing;
Each of the air flow chambers located on the outside and the lower side communicated through the total heat exchange element in the diagonal direction, and each air flow chamber located on the inside and the upper side communicates as one and is provided on the rear surface of the housing via a single indoor air blowing fan. A ventilation purifier communicating with the indoor air exhaust port. 3. The method of claim 2,
The ventilation purifier further comprising a guide member provided above the outdoor air blowing fan to guide outdoor air to a central area. The method of claim 2, wherein the air purification filter is
A ventilation purifier provided in the center of the bottom surface inside the housing, one end communicating with the outdoor air inlet, and the other end being detachably fitted and coupled to the slot grooves of the filter slot structure that branch and open toward the left and right air flow chambers. 5. The method of claim 4,
A ventilation purifier having an opening and closing door on the front side of the housing adjacent to the filter slot structure. According to claim 4, wherein the total heat exchange element
It has a hexahedral shape as a whole, and a plurality of spacer papers folded in a zigzag form so that the inside of the hexahedron shape can communicate while crossing the indoor and outdoor air vertically has a structure in which the air communication direction is vertically stacked on a horizontal plane,
Each corner of the total heat exchange element is detachably attached to the triangular groove slot with the total heat exchange element inclined in a rhombic shape when viewed from the front so that it can be fitted into the triangular groove slot provided on the inner surface of the space inside the housing. A ventilation purifier that is interleaved and combined. The method of claim 6, wherein the triangular groove slot
Among the inner surfaces of the inner space of the housing, two are provided on the upper and lower surfaces, respectively, and one on the left and right sides, and one each on the left and right sides of the upper part of the filter slot structure is integrally formed, a ventilation purifier.

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