CN211233247U - Outdoor fresh air machine - Google Patents
Outdoor fresh air machine Download PDFInfo
- Publication number
- CN211233247U CN211233247U CN201922329147.6U CN201922329147U CN211233247U CN 211233247 U CN211233247 U CN 211233247U CN 201922329147 U CN201922329147 U CN 201922329147U CN 211233247 U CN211233247 U CN 211233247U
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- air inlet
- fan
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- air
- base
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- 238000005192 partition Methods 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims description 32
- 230000001954 sterilising effect Effects 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 5
- 102000004190 Enzymes Human genes 0.000 claims description 4
- 108090000790 Enzymes Proteins 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 230000002411 adverse Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000035939 shock Effects 0.000 abstract description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 10
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004887 air purification Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000004087 circulation Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004089 microcirculation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
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Abstract
The utility model discloses an outdoor fresh air machine, which comprises a box body with an opening at the bottom, wherein a first filtering device, a fan for sucking air and a second filtering device are arranged in the box body; the base support comprises an annular frame and a conical table which is gradually narrowed from bottom to top, the conical table is arranged at the top of the annular frame, a second air inlet is formed in the top of the conical table, the base partition plate is arranged at an opening at the bottom of the box body, and the conical table of the base support is fixedly connected to the middle of the base partition plate, so that the first air inlet and the second air inlet are opposite and communicated; an air opening mesh enclosure is arranged at the first air inlet or/and the second air inlet. The utility model relates to an outdoor new fan that is used for outdoor places such as villa, single-span can satisfy outdoor adverse circumstances needs and has the shock attenuation effect.
Description
Technical Field
The utility model relates to a new trend technical field especially relates to an outdoor new fan.
Background
The fresh air system is a micro-circulation system which introduces outdoor air through a physical principle on the premise of not opening a window, filters the outdoor air, sends the filtered outdoor air to the room and extrudes indoor non-fresh air, so that outdoor air and indoor air are fully exchanged, and sufficient fresh air is ensured to be in the room. The new trend system mainly includes new fan, main control unit, touch screen or remote controller, air supply trunk line, air-dividing box and a plurality of air supply branch pipe etc. and its theory of operation is: the fresh air from the outdoor after being filtered and purified by the fresh air fan enters the air dividing box through the main air supply pipeline, is distributed to each air supply branch pipe, and then is introduced into each room. The fresh air machine mainly comprises a box body, a fan, a filtering device and the like, wherein the fan and the filtering device are integrated in the box body and used for sucking air.
At present, the new fan on the market is indoor new fan mostly, and is few to outdoor new trend introduction volume, belongs to indoor outer air circulation basically and purifies, can not maintain indoor malleation, can not prevent that outdoor dirty air from getting into indoorly from the door and window gap, in the environment that is closed relatively, when indoor long time new trend introduction volume is few, easily causes indoor fresh air's not enough, makes indoor air become muddy, and carbon dioxide increases, is unfavorable for indoor personnel's healthy. Therefore, an outdoor fresh air fan is developed and designed, wherein the outdoor fresh air fan filters outdoor fresh air and inputs the filtered outdoor fresh air to various places in a room, so that turbid air at each corner in the room is extruded, convection of the indoor fresh air is brought by the outdoor fresh air fan, and formaldehyde and CO can be effectively diluted and removed2And harmful gases are generated indoors and outdoors, fresh air is introduced, and polluted gases are discharged, so that indoor breathing is smoother and healthier. And the outdoor fresh air machine is arranged outdoors, has the advantage of low noise, and can enable people to enjoy quiet sleep, so that the outdoor fresh air machine is being used in more and more places, particularly places such as villas and single houses, and the air purification requirement of the whole room can be met by arranging one outdoor fresh air machine. However, due to outdoor noveltyThe fan is arranged outdoors, and is often influenced by severe environments such as rain, wind, water accumulation and the like, so that new challenges are brought to the design of an outdoor new fan. In addition, because outdoor new fan will satisfy whole air purification needs, consequently, the power that outdoor new fan was used for the fan of suction air can be some big usually, like this, how to install the fan, the vibrations that reduce the fan during operation and produce also are the technical problem that needs to solve urgently.
Disclosure of Invention
In order to solve the technical problem, the utility model provides an outdoor new fan that can satisfy outdoor adverse circumstances needs and have the shock attenuation effect for outdoor places such as villa, single-span.
The technical scheme of the utility model is realized like this:
an outdoor fresh air fan comprises a box body with an opening at the bottom, wherein a first filtering device, a fan for sucking air and a second filtering device are sequentially arranged in the box body from bottom to top, the fan is suspended at the middle position in the box body, an air outlet is formed at the top of the box body, the outdoor fresh air fan also comprises a base, the base comprises a base partition plate and a base support, a first air inlet is formed in the middle of the base partition plate, and a plurality of air inlet meshes which are distributed at intervals are formed on the base partition plate at the periphery of the first air inlet; the base support comprises an annular frame and a conical table which is gradually narrowed from bottom to top, the conical table is installed at the top of the annular frame, a second air inlet is formed in the top of the conical table, the base partition plate is installed at an opening at the bottom of the box body, and the conical table of the base support is fixedly connected to the middle of the base partition plate, so that the first air inlet and the second air inlet are opposite and communicated; and an air opening mesh enclosure is arranged at the first air inlet or/and the second air inlet.
Further, the conical frustum is a conical frustum or a rectangular frustum or a square frustum.
Furthermore, the base baffle is square, a step is formed at the position, close to the edge, of the base baffle, and the bottom of the box body is installed on the step.
Further, the mounting structure of fan does: the mounting device comprises a mounting square groove with an opening at the top, a mounting disc with an opening at the top and four disc and spoke supports, wherein the four disc and spoke supports are uniformly arranged on the periphery of the mounting disc, one end of each disc and spoke support is fixedly connected to the outer wall of the mounting disc, the other end of each disc and spoke support is fixedly locked at the top of the side wall of the mounting square groove through a fastener, and a cushion pad is arranged between each disc and spoke support and the top of the side wall of the mounting square groove; the four sides of the installation square groove are installed on the inner wall of the box body through L-shaped supports, a third air inlet is formed in the bottom of the installation square groove, an installation hole is formed in the bottom of the installation disc, the fan is provided with an air inlet port for axially feeding air and an air outlet port for tangentially discharging air, the fan is arranged in the installation square groove, a shell of the fan is fixedly connected to the bottom of the installation disc, a motor of the fan penetrates through the installation hole and is contained in the installation disc, and the air inlet port of the fan is opposite to the third air inlet.
Furthermore, a fan joint is arranged and connected between the air inlet port of the fan and the third air inlet.
Furthermore, the disc and spoke support comprises a bottom plate and two side plates which are formed by upwards extending from two sides of the bottom plate, and the disc and spoke support and the mounting disc are integrally formed.
Furthermore, the disc and spoke support further comprises a reinforcing plate with a V-shaped section, and the reinforcing plate is fixedly connected to the bottom of the bottom plate.
Furthermore, at least one of the four disc and spoke supports is communicated with the inside of the mounting disc.
Furthermore, four side walls of the installation square groove extend outwards to form a rim, the other end of the spoke support is locked on the rim through a fastener, and the rim is locked on the transverse part of the L-shaped support through a fastener.
Further, the first filtering device comprises a PM10 filter or/and a biological filter or/and an activated carbon filter, and the second filtering device comprises a plant sterilization fiber net or/and an enzyme-containing sterilization net or/and a PM2.5 filter.
The utility model has the advantages that: the utility model provides an outdoor new fan through improving the base structure of the current outdoor new fan, improves the structural style who has dull and stereotyped base structure now for the structural style who comprises base baffle and base support, through designing the base support into the structural style who comprises annular frame and toper platform, has raised the position of bottom air intake, has improved the degree of difficulty that the rainwater got into in the outdoor new fan from the bottom. And the conical table is in a structural style of narrowing gradually from bottom to top, so that rainwater is difficult to enter the outdoor fresh air machine from the side. The base baffle is used for realizing being connected between base support and the box of outdoor new fan on the one hand, and on the other hand can form more air inlet points in the periphery of toper platform to improve outdoor new fan's intake, satisfy the requirement of outdoor new fan amount of wind. Wherein, the design of wind gap screen panel and air inlet mesh hole for avoid great debris to enter into in the outdoor new fan. Therefore, the utility model discloses can be used to outdoor places such as villa, single-span to can satisfy outdoor adverse circumstances needs.
Drawings
Fig. 1 is a perspective view of the outdoor fresh air machine of the present invention;
fig. 2 is a schematic structural view of the outdoor fresh air machine with the side cover removed according to the present invention;
FIG. 3 is a perspective view of the base of the present invention;
fig. 4 is a top view of the base of the present invention;
fig. 5 is a side view of the base of the present invention;
FIG. 6 is a top view of the base support of the present invention;
fig. 7 is a perspective view of the middle blower mounting structure of the present invention;
fig. 8 is a top view of the middle blower mounting structure of the present invention;
fig. 9 is a bottom view of the middle blower mounting structure of the present invention;
fig. 10 is a side view of the middle blower mounting structure of the present invention.
Detailed Description
In order to clearly understand the technical content of the present invention, the following embodiments are specifically mentioned, which are only for the purpose of better understanding the content of the present invention and not for the purpose of limiting the scope of the present invention. The components in the structures of the drawings of the embodiments are not necessarily to scale, and do not represent actual relative sizes of the structures in the embodiments. The upper side or upper side of the structure or surface includes the case where other layers are interposed.
As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, an outdoor fresh air fan includes a box 1 with an opening at the bottom, a first filtering device, a fan 2 for sucking air and a second filtering device are sequentially installed in the box from bottom to top, the fan is suspended at the middle position in the box, an air outlet 11 is formed at the top of the box, the outdoor fresh air fan also includes a base 3, the base includes a base partition plate 31 and a base support 32, a first air inlet 311 is formed in the middle of the base partition plate, and a plurality of air inlet meshes 312 arranged at intervals are formed on the base partition plate around the first air inlet; the base support comprises an annular frame 321 and a conical table 322 which is gradually narrowed from bottom to top, the conical table is installed at the top of the annular frame, a second air inlet 323 is formed at the top of the conical table, the base partition plate is installed at the bottom opening of the box body, and the conical table of the base support is fixedly connected to the middle of the base partition plate, so that the first air inlet and the second air inlet are opposite and communicated; and an air opening mesh enclosure is arranged at the first air inlet or/and the second air inlet. Like this, through improving the base structure of current outdoor new fan, improve the structural style who has dull and stereotyped base structure now for being become by base baffle and base support constitution, through designing the base support into the structural style of constituteing by annular frame and toper platform, raised the position of bottom air intake, improved the degree of difficulty that the rainwater got into in the outdoor new fan from the bottom. And the conical table is in a structural style of narrowing gradually from bottom to top, so that rainwater is difficult to enter the outdoor fresh air machine from the side. The base baffle is used for realizing being connected between base support and the box of outdoor new fan on the one hand, and on the other hand can form more air inlet points in the periphery of toper platform to improve outdoor new fan's intake, satisfy the requirement of outdoor new fan amount of wind. Wherein, the design of wind gap screen panel and air inlet mesh hole for avoid great debris to enter into in the outdoor new fan. Therefore, the utility model discloses can be used to outdoor places such as villa, single-span to can satisfy outdoor adverse circumstances needs.
In the above structure, referring to fig. 1, the case may be composed of a side cover and a case body, so that it is convenient to install the fan, the first filter, the second filter, etc. in the case after opening the side cover. The air outlet at the top of the box body can be connected with a pipe connector 12 so as to be convenient for connecting an air guide pipe leading to the indoor.
Preferably, the conical frustum is a conical frustum or a rectangular frustum or a square frustum. As a preferred embodiment, the conical table is illustrated in a rectangular conical table form in fig. 2 and 5, but the invention is not limited thereto, and the conical table may be designed in other forms according to actual needs.
Preferably, the conical table and the base partition plate are detachably and fixedly connected through a plurality of fasteners. Thus, the base clapboard and the base bracket can be conveniently and quickly disassembled.
Preferably, the first air inlet and the second air inlet are both square. As a preferred embodiment, the first air inlet and the second air inlet are illustrated in fig. 5 and 6 as rectangular patterns, but the first air inlet may be designed in other shapes according to actual needs.
Preferably, referring to fig. 5, the base partition is square, a step 313 is formed at a position close to the edge of the base partition, and the bottom of the case is mounted on the step. Therefore, steps are formed on four sides of the base partition plate, and the outdoor new fan is conveniently and fixedly connected with the box body of the outdoor new fan.
Preferably, referring to fig. 7, 8, 9 and 10, the mounting structure of the fan is: the mounting device is provided with a mounting square groove 4 with an opening at the top, a mounting disc 5 with an opening at the top and four disc and spoke supports 6, wherein the four disc and spoke supports are uniformly arranged at the periphery of the mounting disc, one end of each disc and spoke support is fixedly connected to the outer wall of the mounting disc, the other end of each disc and spoke support is fixedly locked at the top of the side wall of the mounting square groove through a fastener, and a cushion pad is arranged between each disc and spoke support and the top of the side wall of the mounting square groove; the four sides of the installation square groove are installed on the inner wall of the box body through the L-shaped support 7, a third air inlet 41 is formed at the bottom of the installation square groove, an installation hole 51 is formed at the bottom of the installation disc, the fan is provided with an air inlet port for axially feeding air and an air outlet port for tangentially discharging air, the fan is arranged in the installation square groove, a shell part 21 of the fan is fixedly connected to the bottom of the installation disc, a motor part 22 of the fan penetrates through the installation hole and is contained in the installation disc, and the air inlet port of the fan is just opposite to and connected with the third air inlet.
In the structure, the fan mounting structure of the outdoor fresh air fan is ingeniously designed to be composed of the mounting square groove and the mounting disc, so that the suspension mounting of the fan is realized, namely, the fan is mounted in the middle position in the box body of the outdoor fresh air fan, air from the lower part can be sucked up through the air inlet at the bottom of the mounting square groove, and air flow can flow out from the opening at the top of the mounting square groove after passing through the air inlet port in the axial direction and the air outlet port in the tangential direction of the fan. The installation disc is used for the fixed mounting fan, consequently, the installation disc need be through the suspension of dish spoke support at installation square groove top position, for the fan reserves installation space, for the vibrations that reduce fan work, the utility model discloses set up the blotter between the top in dish spoke support and installation square groove, can play the shock attenuation effect. The four disc-spoke supports are arranged in a radial shape, so that the air flow sucked from the side face of the fan can flow favorably, the air quantity cannot be influenced, and the obstruction of the mounting structure to the air quantity is reduced.
Preferably, referring to fig. 9, a blower connector 8 is provided, and the blower connector is connected between the air inlet port of the blower and the third air inlet. Therefore, the air inlet port of the fan can be tightly connected with the mounting square groove through the fan joint, and an effective air inlet channel is formed.
Preferably, referring to fig. 8, the spoke support includes a bottom plate 61 and two side plates 62 extending upward from two sides of the bottom plate, and the spoke support is integrally formed with the mounting disk. The disc spoke support is designed into a structural style consisting of the bottom plate and the two side plates, so that the transverse area can be reduced, the influence on the air quantity is reduced, and the connection strength can be ensured.
Preferably, referring to fig. 8, the disc and spoke support further comprises a reinforcing plate 63 with a V-shaped cross section, and the reinforcing plate is fixedly connected to the bottom of the bottom plate. Like this, lead to the reinforcing plate that sets up the V-arrangement in the bottom of bottom plate, can further strengthen the joint strength who coils the spoke support, and the V-arrangement structure can carry out the water conservancy diversion to wind, further reduces the influence to the amount of wind.
Preferably, at least one of the four disc and spoke supports is communicated with the inside of the mounting disc. Therefore, the wires, control wires and the like of the motor of the fan can be led out to the side wall of the box body through the disc and spoke support,
four side walls of the mounting square groove extend outwards to form a rim 42, the other end of the spoke support is locked on the rim through a fastener, and the rim is locked on the transverse part of the L-shaped support through a fastener. In this way, the side wall of the mounting square groove extends outwards to form a rim, so that locking and mounting can be realized even when the side wall of the mounting square groove is thinned.
Preferably, the first filtering device comprises a PM10 filter or/and a biological filter or/and an activated carbon filter, and the second filtering device comprises a plant sterilization fiber net or/and an enzyme-containing sterilization net or/and a PM2.5 filter. Fig. 2 shows only the installation positions of the first and second filter devices, and the PM10 filter can filter large-diameter particulate dust particles and the like, and the biological filter can filter microorganisms, harmful volatile matters and the like. The plant sterilization fiber net (composed of plant sterilization cotton) has strong sterilization capability and good sterilization effect, fine particle suspended matters can be paved through the PM2.5 filter, and the purification rate of the plant sterilization fiber net is up to 99%. But not limited to, the utility model discloses in can also replace other filter screens according to actual need, for example active carbon filter screen, contain enzyme sterilization net etc..
The above embodiments are described in detail with reference to the accompanying drawings, and those skilled in the art will be able to make various modifications and changes to the above embodiments without departing from the spirit of the present invention.
Claims (10)
1. The utility model provides an outdoor new fan, includes bottom open-ended box (1), install first filter equipment, fan (2) and the second filter equipment that is used for suction air in proper order in the box from bottom to top, just the fan suspension in middle part position in the box, the top of box is formed with air outlet (11), its characterized in that: the air conditioner also comprises a base (3), wherein the base comprises a base partition plate (31) and a base support (32), a first air inlet (311) is formed in the middle of the base partition plate, and a plurality of air inlet meshes (312) which are distributed at intervals are formed on the base partition plate on the periphery of the first air inlet; the base support comprises an annular frame (321) and a conical table (322) which is gradually narrowed from bottom to top, the conical table is installed at the top of the annular frame, a second air inlet (323) is formed at the top of the conical table, the base partition plate is installed at an opening at the bottom of the box body, and the conical table of the base support is fixedly connected to the middle of the base partition plate, so that the first air inlet and the second air inlet are opposite and communicated; and an air opening mesh enclosure is arranged at the first air inlet or/and the second air inlet.
2. The outdoor fresh air machine of claim 1, characterized in that: the conical frustum is a conical frustum or a rectangular frustum or a square frustum.
3. The outdoor fresh air machine of claim 1, characterized in that: the base baffle is square, a step (313) is formed at the position, close to the edge, of the base baffle, and the bottom of the box body is installed on the step.
4. The outdoor fresh air machine of claim 1, characterized in that: the mounting structure of fan does: the mounting device is provided with a mounting square groove (4) with an opening at the top, a mounting disc (5) with an opening at the top and four disc-spoke supports (6), wherein the four disc-spoke supports are uniformly arranged on the periphery of the mounting disc, one end of each disc-spoke support is fixedly connected to the outer wall of the mounting disc, the other end of each disc-spoke support is fixedly locked at the top of the side wall of the mounting square groove through a fastener, and a cushion pad is arranged between each disc-spoke support and the top of the side wall of the mounting square groove; the four sides of the installation square groove are installed on the inner wall of the box body through L-shaped supports (7), a third air inlet (41) is formed at the bottom of the installation square groove, an installation hole (51) is formed at the bottom of the installation disc, the fan is provided with an air inlet port for axially feeding air and an air outlet port for tangentially discharging air, the fan is arranged in the installation square groove, a shell part of the fan is fixedly connected to the bottom of the installation disc, a motor part of the fan penetrates through the installation hole and is contained in the installation disc, and the air inlet port of the fan is just opposite to the third air inlet.
5. The outdoor fresh air machine of claim 4, characterized in that: and a fan joint (8) is arranged and connected between the air inlet port of the fan and the third air inlet.
6. The outdoor fresh air machine of claim 4, characterized in that: the disc and spoke support comprises a bottom plate (61) and two side plates (62) formed by upwards extending from two sides of the bottom plate, and the disc and spoke support and the mounting disc are integrally formed.
7. The outdoor fresh air machine of claim 6, characterized in that: the disc spoke support further comprises a reinforcing plate (63) with a V-shaped section, and the reinforcing plate is fixedly connected to the bottom of the bottom plate.
8. The outdoor fresh air machine of claim 6, characterized in that: at least one of the four disk spoke supports is communicated with the inside of the mounting disk.
9. The outdoor fresh air machine of claim 4, characterized in that: four side walls of the installation square groove extend outwards to form a rim (42), the other end of the disc-spoke support is locked on the rim through a fastener, and the rim is locked on the transverse part of the L-shaped support through the fastener.
10. The outdoor fresh air machine of claim 1, characterized in that: the first filtering device comprises a PM10 filter or/and a biological filter or/and an activated carbon filter, and the second filtering device comprises a plant sterilizing fiber net or/and an enzyme-containing sterilizing net or/and a PM2.5 filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922329147.6U CN211233247U (en) | 2019-12-23 | 2019-12-23 | Outdoor fresh air machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922329147.6U CN211233247U (en) | 2019-12-23 | 2019-12-23 | Outdoor fresh air machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211233247U true CN211233247U (en) | 2020-08-11 |
Family
ID=71916329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922329147.6U Active CN211233247U (en) | 2019-12-23 | 2019-12-23 | Outdoor fresh air machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN211233247U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022114001A1 (en) * | 2020-11-30 | 2022-06-02 | ダイキン工業株式会社 | Ventilation device |
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2019
- 2019-12-23 CN CN201922329147.6U patent/CN211233247U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022114001A1 (en) * | 2020-11-30 | 2022-06-02 | ダイキン工業株式会社 | Ventilation device |
| JP2022086295A (en) * | 2020-11-30 | 2022-06-09 | ダイキン工業株式会社 | Ventilation system |
| JP7148818B2 (en) | 2020-11-30 | 2022-10-06 | ダイキン工業株式会社 | ventilator |
| US12025342B2 (en) | 2020-11-30 | 2024-07-02 | Daikin Industries, Ltd. | Ventilation device |
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