CN209840354U - Air supply device - Google Patents
Air supply device Download PDFInfo
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- CN209840354U CN209840354U CN201920428323.9U CN201920428323U CN209840354U CN 209840354 U CN209840354 U CN 209840354U CN 201920428323 U CN201920428323 U CN 201920428323U CN 209840354 U CN209840354 U CN 209840354U
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- air
- air inlet
- shielding wall
- wind shielding
- cover
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Abstract
The utility model provides an air supply arrangement, include: a frame having an opening for allowing air to enter and exit, the frame forming an outer shape, a cover for covering the opening, an air inlet provided in the cover for allowing air to enter the frame, an air outlet provided in the cover for allowing air to exit the frame, and a cover portion protruding from the cover toward an upstream side of the air inlet, the cover portion including: the wind shield comprises a wind shield wall which protrudes from the face shield to the upstream side of the wind inlet and is intersected with a connecting line of the center of the wind inlet and the center of the wind outlet, and a wind inlet cover which extends from one side of the wind shield wall, which is positioned at the upstream side of the wind inlet, of the wind shield wall to one side of the wind inlet by taking the wind shield wall as a boundary and covers the wind inlet.
Description
Technical Field
The utility model relates to an air supply arrangement.
Background
A general air blowing device is installed on an indoor ceiling or a wall to condition air in a target area. The heating and air-changing device for the bathroom shown in fig. 1 comprises a heating and air-changing mechanism 1 and a panel 2 installed on the heating and air-changing mechanism 1, wherein an air inlet 3 and a first air outlet 4 are formed in the panel 2, and the heating and air-changing mechanism 1 comprises a second air outlet 5, an air flow channel, a heating module 6, an air suction air supply wind wheel 7 and a wind wheel driving motor for driving the air suction air supply wind wheel 7 to rotate. The heating module 6 is located at the first air outlet 4, the air flow channel is communicated with the air inlet 3, the first air outlet 4 and the second air outlet 5, and the air suction and supply wind wheel 7 is located in the air flow channel. Indoor air enters the heating and ventilating mechanism 1 from the air inlet 3 on the panel 2 and is blown to the indoor through the air flow channel, the heating module 6 and the first exhaust port 4, and therefore the air in the target area in the indoor is circularly heated.
In the heating and ventilating device for bathroom shown in fig. 1, since the air inlet 3 and the first exhaust port 4 are both provided in the panel 2 facing the indoor side, if the air blown out from the first exhaust port 4 is not blown into the room, the air may be sucked into the heating and ventilating device for bathroom again from the air inlet 3 in the panel 2, and the air passage may be short-circuited. The air passage short circuit means that the air blown out from the outlet is sucked into the inlet 3 again before being blown into the target area, and thus the air cannot be blown into the target area. This prevents the heated air from being blown into the room, thereby reducing the heating efficiency. Similarly, if the air is sucked into the room and blown into the room, the air passage may be short-circuited.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to solve the above problem, the present invention provides an air supply device capable of preventing a short circuit of a wind path and ensuring air supply efficiency.
(II) technical scheme
The utility model provides an air supply arrangement, include:
a frame forming a profile with openings for the entry and exit of air,
a mask for covering the opening, wherein the mask is provided with a plurality of openings,
an air inlet which is arranged on the face shield and used for air to enter the frame,
an air outlet arranged on the face shield and used for blowing air out of the frame,
and a covering portion protruding from the mask to an upstream side of the air inlet,
the cover portion includes:
a wind shielding wall which protrudes from the face mask to the upstream side of the air inlet and is intersected with a connecting line of the center of the air inlet and the center of the air outlet,
and the air inlet cover extends from one side of the end part of the wind shielding wall on the upstream side of the air inlet on the wind shielding wall to one side of the air inlet by taking the wind shielding wall as a boundary and covers the air inlet.
In some embodiments of the present invention, the first and second,
the cover portion further includes:
a rotating arm which enables the air inlet cover to rotate relative to the wind shielding wall and is positioned at one side of the air inlet of the wind shielding wall,
the rotating arm includes:
a rotating shaft for rotating the air inlet cover,
and a connecting rod for connecting the air inlet cover and the rotating shaft.
In some embodiments of the present invention, the first and second,
the connecting rod with what air inlet cover formed towards keep out the contained angle of wind wall one side is the acute angle.
In some embodiments of the present invention, the first and second,
the connecting rod is provided with a positioning convex rib which is protruded and extended from the connecting rod to the wind shielding wall.
In some embodiments of the present invention, the first and second,
the connecting rod is provided with a plurality of positioning convex ribs.
In some embodiments of the present invention, the first and second,
the air inlet cover is provided with a sealing rib, and the sealing rib is arranged in an extending manner from the inner side of the air inlet cover to the protruding face shield.
In some embodiments of the present invention, the first and second,
and the face mask is provided with a sealing sheet which surrounds the air outlet and protrudes towards the upstream side of the air outlet.
(III) advantageous effects
(1) Because the wind shielding wall is arranged between the air inlet and the air outlet, the air blown out of the air outlet can be prevented from being sucked into the air inlet again before being blown into the room, and the short circuit of an air path is avoided; meanwhile, a certain distance is arranged between the air inlet cover and the face mask, so that the air inlet quantity is ensured while the air path short circuit is prevented.
(2) The air inlet cover arranged on the air inlet can shield fasteners such as screws on the mask and prevent the fasteners from being exposed to influence the appearance.
(3) The sealing rib is extended from the inner side surface of the air inlet cover to one side of the mask, so that air blown out from the air outlet to the wind shielding wall can be prevented from flowing to one side of the air inlet from a gap between the air inlet cover and the upper end part of the wind shielding wall.
(4) The sealing rib is positioned on one side of the air outlet of the wind shielding wall, and a sealing groove clamped with the sealing rib is arranged on one side, facing the air outlet, of the wind shielding wall, so that the sealing performance can be improved.
(5) The connecting rod is provided with a positioning convex rib to prevent the wind shielding wall from being damaged due to uneven stress of the wind shielding wall caused by manufacturing tolerance.
Drawings
Fig. 1 is a schematic structural diagram of an air supply device in the prior art.
Fig. 2 is a cut-away perspective view of the air supply device in the embodiment of the present invention.
Fig. 3 is a cross-sectional view of a mask of an air supply device according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of an air inlet cover of an air supply device according to the present invention.
Fig. 5 is another cross-sectional view of a mask of an air supply device according to an embodiment of the present invention.
[ notation ] to show
The prior art is as follows:
1-a heating and air exchanging mechanism; 2-a panel; 3-air inlet; 4-a first exhaust port; 5-a second air outlet; 6-heating the module; 7-air suction and air supply wind wheel.
The utility model discloses:
1-a frame;
11-opening;
2-a face mask;
21-an air inlet;
22-air outlet;
23-sealing piece;
3-a cover portion;
31-wind shielding wall;
311-upper end portion;
312-a seal groove;
32-air inlet cover;
321-sealing ribs;
322-a rotating arm;
3221-shaft;
3222-connecting rod;
3223-positioning ribs;
4-an air supply unit;
41-snail shell;
42-fan blades;
43-Motor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. In the following, terms describing positional relationships of the respective members, such as "upper", "lower", "left", "right", "front", "rear", "inside", "outside", and the like, indicate positional relationships in a state where the air blowing device is mounted, for example, in a state where the air blowing device is mounted on a ceiling, a window, or a wall.
(first embodiment)
The utility model discloses a first embodiment provides an air supply arrangement, see that fig. 2 shows, include: frame 1, face guard 2, covering portion 3, air supply unit 4, thermoregulation unit.
The frame 1 is in the shape of a rectangular box, forms the outline of the air supply device, and is provided with an opening 11 for air to enter and blow out on one surface. When the blower is mounted, the opening 11 of the frame faces the room. In this embodiment, the air blower is mounted on the ceiling, and the frame 1 is opened downward.
The mask 2 is plate-shaped and covers the opening 11 of the frame. The face of the mask 2 facing the frame opening 11 is an inner face, and the face facing away from the frame opening 11 is an outer face. The term "covering the opening 11 in the frame" means that the inner surface of the mask 2 is in contact with the surface or side of the frame 1 on which the opening 11 is formed. In the mounted state, the face mask 2 covers the opening 11 in the frame and the air blowing unit 4 provided in the frame, and the outer side surface of the face mask 2 faces the indoor side.
The face mask 2 is provided with an air inlet 21 and an air outlet 22. The air inlet 21 is an opening which is arranged on the face mask 2 and is communicated with the air supply unit 4 and the room. Air enters the frame 1 through the air inlet 21. In this embodiment, the air inlet 21 is further provided with a purifying unit for purifying air. The air outlet 22 is an opening provided in the face mask 2 and communicating the air blowing unit 4 with the room. Air is blown out of the frame 1 through the outlet vents 22. In the present embodiment, the air outlet 22 is provided with a rotatable air guide portion for blowing air to a predetermined area.
The covering portion 3 protrudes from the outer surface of the mask 2 toward the upstream side of the air inlet 21 in correspondence with the position of the air inlet 21 of the mask.
The air supply unit 4 is provided in the frame 1, and includes: snail shell 41, fan blades 42 and motor 43. The snail shell 41 forms an air path for communicating the air inlet 21 and the air outlet 22, the fan blades 42 are arranged in the snail shell 41, and the motor 43 rotates the fan blades 42.
The temperature adjusting unit is located in the frame 1, and is provided on the downstream side of the air blowing unit 4 and on the upstream side of the air outlet 22. In the present embodiment, the temperature adjusting unit is a heating unit for heating air blown out of the frame 1 from inside the frame 1.
In this embodiment, when the air supply device is operated, the air is drawn by the air supply unit 4 to form an air flow passing through the air inlet 21, the purification unit, the air supply unit 4, the temperature adjustment unit, and the air outlet 22 in sequence.
As shown in fig. 3, the cover portion 3 includes: a wind shielding wall 31 and an air inlet cover 32. The wind shielding wall 31 is a plate-like structure extending from the outer surface of the mask 2 to the upstream side of the inlet 21 and located between the inlet 21 and the outlet 22. That is, the wind shielding wall 31 intersects with a line connecting the center of the wind inlet 21 to the center of the wind outlet 22, and the wind shielding wall 31 is perpendicular to the mask 2.
The side of the outlet 22 in this embodiment is the side with the outlet 22 bounded by the wind shielding wall 31. Similarly, the side of the air inlet 21 is the side with the air inlet 21 bounded by the wind shielding wall 31.
The air inlet cover 32 is flat, and has an inner side surface facing the air inlet 21 and an outer side surface facing away from the air inlet 21. The end of the wind shielding wall 31 on the upstream side of the inlet 21 is an upper end 311, and in the mounted state, the inner side surface of the inlet cover 32 is in contact with the upper end 311 of the wind shielding wall. The air inlet cover 32 protrudes from the wind shielding wall 31 toward the air inlet 21 side and covers the air inlet 21. That is, in the mounted state, the inlet cover 32 blocks at least a part of the inlet opening 21 as viewed from the upstream side of the inlet opening 21 in a direction perpendicular to the mask 2, and is provided with a certain distance from the mask 2.
In this embodiment, the air supply device is installed on the ceiling to connect the indoor and outdoor, the face mask 2 faces the indoor, and the indoor air enters the frame 1 from the air inlet 21 of the face mask under the suction of the air supply unit 4, passes through the purification unit, the fan blades 42 of the air supply unit 4, the snail shell 41 and the temperature adjustment unit in sequence, and is finally blown into the indoor again through the air outlet 22 under the guide of the air guide part.
As shown in fig. 3, in the present embodiment, in the mounted state, the wind shielding wall 31 and the intake cover 32 form a substantially L shape. The wind shielding wall 31 and the air inlet cover 32 are separately provided, but the wind shielding wall 31 and the air inlet cover 32 may be integrally provided.
In the air blowing device of the present embodiment, when air is blown out from the outlet 22 into the room, the air guiding portion is turned to the side closer to the inlet 21, or when the suction force of the air blowing unit 4 is large, the air blown out from the outlet 22 is blown out to the inlet 21 side, and the air flows toward the inlet 21 side along the outer surface of the mask 2. In this embodiment, because the wind shielding wall 31 is disposed between the wind inlet 21 and the wind outlet 22, air cannot be continuously blown along the outer side of the mask 2 toward the wind inlet 21 under the blockage of the wind shielding wall 31. This prevents the air blown out from the outlet 22 from being sucked into the inlet 21 again before being blown into the room, thereby preventing the formation of a short circuit in the air passage.
In addition, when the air blown out from the outlet 22 is sucked by the blowing unit 4 and tends to pass over the upper end 311 of the wind shielding wall and continue to be blown out toward the inlet 21, in this embodiment, the inlet cover 32 for covering the inlet 21 is provided on the inlet 21, and the inlet cover 32 contacts the upper end 311 of the wind shielding wall and extends from the side provided with the wind shielding wall 31 to the side provided with the inlet 21, so that the air blown out from the outlet 22 side to the inlet 21 side does not enter the inlet 21 from the side of the inlet 21 close to the wind shielding portion.
Meanwhile, because a certain distance is arranged between the air inlet cover 32 and the face mask 2, indoor air can enter the upstream side of the air inlet 21 from a gap between the air inlet cover 32 and the face mask 2, and then is sucked into the frame 1 through the air inlet 21. Thus, the short circuit of the air passage is prevented, and the air inlet volume is ensured.
In general, when the air blower is mounted for convenience of mounting, the frame 1 and the components in the frame 1 are first mounted on the ceiling, and then the mask 2 is mounted on the frame 1 by penetrating the mask 2 with fasteners such as screws. When the air inlet 21 of the mask is provided with screws, the air inlet cover 32 is arranged on the air inlet 21, so that the air inlet cover 32 can shield the screws and other fasteners to prevent the exposed screws from affecting the appearance.
In the present embodiment, the air inlet cover and the wind shielding wall are provided separately, but may be provided integrally.
As shown in fig. 4, a sealing rib 321 protruding from the inner side surface of the inlet cover 32 toward the mask 2 is provided on the inner side surface of the inlet cover 32 on the side of the outlet 22, and the distance from the end of the sealing rib 321 to the mask 2 is smaller than the distance from the upper end 311 of the wind shielding wall to the mask 2. In this embodiment, the sealing rib 321 is a double protruding rib. The wind shielding wall 31 is provided with a sealing groove 312, and when the inlet cover 32 closes the inlet 21 of the mask, the sealing rib 321 is engaged with the sealing groove 312.
In the blower of the present embodiment, the sealing rib 321 is extended to protrude from the inner surface of the inlet cover 32 toward the mask 2, and the distance from the end of the sealing rib 321 to the mask 2 is smaller than the distance from the upper end 311 of the wind shielding wall to the mask 2, so that even if there is a gap between the inlet cover 32 and the upper end 311 of the wind shielding wall, the air blown out from the outlet 22 toward the wind shielding wall 31 can be prevented from flowing toward the inlet 21 side from the gap between the inlet cover 32 and the upper end 311 of the wind shielding wall under the blockage of the sealing rib 321, and the occurrence of short circuit of the air path and noise can be prevented. In this embodiment, the sealing rib 321 is located on the outlet 22 side of the wind shielding wall 31, and the sealing groove 312 engaged with the sealing rib 321 is provided on the wind shielding wall 31 on the side facing the outlet 22, whereby the sealing performance can be increased, and air can be more effectively prevented from flowing to the inlet 21 side from the gap between the inlet cover 32 and the wind shielding wall 31.
In the above case where the air inlet cover and the wind shielding wall are separately provided, the sealing rib 321 may be omitted when the air inlet cover and the wind shielding wall are integrally provided.
(second embodiment)
The second embodiment of the present invention provides an air supply device, as shown in fig. 3-5, the covering portion 3 is further provided with a rotating arm 322. The rotation arm 322 is located on the side of the air inlet 21, is disposed between the air inlet cover 32 and the face mask 2, and extends from the inner side of the covering portion 3 toward the face mask 2 for rotating the air inlet cover 32 relative to the wind shielding wall 31. The rotating arm 322 includes a rotating shaft 3221 and a connecting rod 3222. The rotating shaft 3221 is disposed on the wind shielding wall 31, and the connecting rod 3222 connects the rotating shaft 3221 and the air intake cover 32, and an included angle formed between the connecting rod 3222 and the air intake cover 32 and facing the wind shielding wall 31 is an acute angle. On a surface of the connecting rod 3222 facing the wind shielding wall 31, a plurality of positioning ribs 3223 are provided to project toward the wind shielding wall 31. In this embodiment, the positioning ribs 3223 are disposed parallel to the air inlet cover 32.
In the air supply device of the present embodiment, since the covering portion 3 is provided with the rotating arm 322, the air inlet cover 32 can rotate relative to the wind shielding wall 31, that is, the air inlet cover 32 can be opened and closed. When the user mounts the mask 2 to the frame 1, the air inlet cover 32 may be opened and the mask 2 may be secured to the frame 1. At this time, the intake port cover 32 is in a downward open state. At this time, after the mask 2 is fixed to the frame 1 by a tool using a fastener such as a screw, the inlet cover 32 is pushed upward until the inlet cover 32 is closed on the mask 2.
When the user needs to remove the mask 2 from the frame 1, the air inlet cover 32 is first opened. At this time, the air inlet cover 32 is guided by the rotation shaft 3221 of the rotation arm 322 by gravity, and the portion of the air inlet cover 32 located on the air outlet 22 side rotates toward the air outlet 22 with the wind shielding wall 31 as a boundary, and the portion of the air inlet cover 32 located on the air inlet 21 side rotates and falls toward the indoor side. Since the rotating arm 322 is disposed on the wind inlet 21 side of the wind shielding wall 31, when the portion of the wind inlet cover 32 on the wind outlet 22 side is rotated by a certain angle toward the wind outlet 22, the connecting rod 3222 will contact with the wind shielding wall 31. The air inlet cover 32 will no longer rotate and fall toward the air outlet 22 under the support of the wind shielding wall 31. Thus, when the user is positioned below the air inlet 21, the air inlet cover 32 is prevented from shaking back and forth downward under the influence of gravity to hit the user. When the inlet cover 32 is opened, the user can remove the fastening member such as a screw from the mask 2 by using a tool, thereby removing the mask 2 from the frame 1 for subsequent maintenance or the like.
When the connecting rod 3222 is to be in contact with the wind shielding wall 31, one surface of the connecting rod 3222 is in surface contact with the wind shielding wall 31, forming surface contact. In order to make the connection between the air intake cover 32 and the wind shielding wall 31 more stable, two or more rotating arms 322 are provided. As shown in fig. 3-5, the intake vent cover 32 is provided with two rotating arms 322. When the covering portion 3 is provided with three rotating arms, if the rotating arms have tolerance during manufacturing, when the connecting rods 3222 are to be in contact with the wind shielding wall 31, only one of the connecting rods may be in surface contact with the wind shielding wall 31, and the other connecting rods may not be in surface contact with the wind shielding wall 31. Thus, when the wind shielding wall 31 receives a force transmitted through the connecting rod due to gravity and inertia, the wind shielding wall may be damaged by uneven force.
In this embodiment, since the connecting rod 3222 is provided with the positioning protruding rib 3223, when the connecting rod 3222 contacts with the wind shielding wall 31 under the action of inertia, the positioning protruding rib 3223 contacts with the surface of the wind shielding wall 31 to form a line contact, so that the force applied to the wind shielding wall 31 is more uniform, and the wind shielding wall 31 is prevented from being damaged due to the uneven force applied to the wind shielding wall 31 caused by manufacturing tolerance.
Therefore, the present embodiment can prevent the formation of short circuit of the air passage while conveniently attaching and detaching the mask, and ensure the blowing air volume and the blowing efficiency.
As shown in fig. 5, the inner surface of the mask 2 is provided with a sealing sheet 23 that surrounds the outlet 22 and protrudes upstream of the outlet 22. In the present embodiment, the sealing sheet 23 is a plurality of protruding sheets.
In the present embodiment, when the air in the frame 1 is heated by the temperature adjustment unit and then blown out from the outlet 22, the air may enter the frame 1 again through the gap between the outlet 22 and the air guide portion. At this time, the high-temperature air may damage other components. Since the mask 2 is provided with a sealing sheet 23 surrounding the outlet opening 22. The sealing sheet 23 protrudes from the inner surface of the face mask 2 toward the upstream side of the outlet 22 and is provided around the outer periphery of the outlet 22, and prevents air blown out from the outlet 22 from entering the frame 1 again through a gap between the outlet 22 and the air guide portion, and prevents turbulence and noise, and damage to components at high temperature.
The present invention has been described in detail so far with reference to the accompanying drawings. From the above description, those skilled in the art should have a clear understanding of the present invention.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
The use of ordinal numbers such as "first," "second," "third," etc., in the specification and claims to modify a corresponding element does not by itself connote any ordinal number of the element or any ordering of one element from another or the order of manufacture, and the use of the ordinal numbers is only used to distinguish one element having a certain name from another element having a same name. It should also be noted that directional terms, such as "upper", "lower", "front", "rear", "left", "right", etc., used in the embodiments are only directions referring to the drawings, and are not intended to limit the protection scope of the present invention. Throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present invention.
Claims (7)
1. An air supply arrangement comprising:
a frame forming a profile with openings for the entry and exit of air,
a mask for covering the opening, wherein the mask is provided with a plurality of openings,
an air inlet which is arranged on the face shield and used for air to enter the frame,
an air outlet arranged on the face shield and used for blowing air out of the frame,
and a covering portion protruding from the mask to an upstream side of the air inlet,
the method is characterized in that:
the cover portion includes:
a wind shielding wall which protrudes from the face mask to the upstream side of the air inlet and is intersected with a connecting line of the center of the air inlet and the center of the air outlet,
and the air inlet cover extends from one side of the end part of the wind shielding wall on the upstream side of the air inlet on the wind shielding wall to one side of the air inlet by taking the wind shielding wall as a boundary and covers the air inlet.
2. The air supply device according to claim 1, characterized in that:
the cover portion further includes:
a rotating arm which enables the air inlet cover to rotate relative to the wind shielding wall and is positioned at one side of the air inlet of the wind shielding wall,
the rotating arm includes:
a rotating shaft for rotating the air inlet cover,
and a connecting rod for connecting the air inlet cover and the rotating shaft.
3. The air supply device according to claim 2, characterized in that:
the connecting rod with what air inlet cover formed towards keep out the contained angle of wind wall one side is the acute angle.
4. The air supply device according to claim 2, characterized in that:
the connecting rod is provided with a positioning convex rib which is protruded and extended from the connecting rod to the wind shielding wall.
5. The air supply device according to claim 4, characterized in that:
the connecting rod is provided with a plurality of positioning convex ribs.
6. The air supply device according to claim 2, characterized in that:
the air inlet cover is provided with a sealing rib, and the sealing rib is arranged in an extending manner from the inner side of the air inlet cover to the protruding face shield.
7. The air supply device according to claim 1, characterized in that:
and the face mask is provided with a sealing sheet which surrounds the air outlet and protrudes towards the upstream side of the air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920428323.9U CN209840354U (en) | 2019-03-29 | 2019-03-29 | Air supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920428323.9U CN209840354U (en) | 2019-03-29 | 2019-03-29 | Air supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209840354U true CN209840354U (en) | 2019-12-24 |
Family
ID=68909251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920428323.9U Active CN209840354U (en) | 2019-03-29 | 2019-03-29 | Air supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209840354U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022262304A1 (en) * | 2021-06-17 | 2022-12-22 | 广东松下环境系统有限公司 | Ventilation device |
-
2019
- 2019-03-29 CN CN201920428323.9U patent/CN209840354U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022262304A1 (en) * | 2021-06-17 | 2022-12-22 | 广东松下环境系统有限公司 | Ventilation device |
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