WO2024111304A1

WO2024111304A1 - Louver and blower device using louver

Info

Publication number: WO2024111304A1
Application number: PCT/JP2023/037809
Authority: WO
Inventors: 翔太吉川; 和晃山森; 季己村上; 均河合
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2022-11-21
Filing date: 2023-10-19
Publication date: 2024-05-30

Abstract

A louver (1) is provided with: a first outer louver (10); a second outer louver (20); a first inner louver (30); a second inner louver (40); and a plurality of fins (50). A first lower end part (14) of the first outer louver (10) and a second lower end part (24) of the second outer louver (20) constitute a blowing opening (3) in a state of being set upright in a vertical direction. The first inner louver (10) has a first lower end part (31) brought into surface-contact with the first lower end part (14), a first upper end part (32) brought into surface-contact with a first outside lateral surface (12), and a first rectification part (33) connecting the first lower end part (31) and the first upper end part (32). The second inner louver (20) has a second lower end part (41) brought into surface-contact with the second lower end part (24), a second upper end part (42) brought into surface-contact with a second outside lateral surface (22), and a second rectification part (43) connecting the second lower end part (41) and the second upper end part (42).

Description

Louver and air blower using the louver

This disclosure relates to a louver that discharges airflow from a fan and a blower device that uses a louver.

A conventional air blowing cylinder (louver) for discharging airflow from a fan includes a cylindrical air cylinder and a nozzle. The air blowing cylinder has an opening extending in the longitudinal direction, and a nozzle extending in the longitudinal direction is embedded in the opening. The airflow flowing inside the air blowing cylinder is discharged from the air blowing slot of the nozzle (see, for example, Patent Document 1).

International Publication No. 2018/196437

In conventional technology, when assembling a nozzle to an air cylinder, the nozzle is inserted along the longitudinal opening of the air cylinder. This structure makes the structure of the contact area between the cylinder and the nozzle complex, requiring strict dimensional control, and there is a risk of air leaking into the gap between the cylinder and the nozzle, increasing noise.

This disclosure has been made to solve the above problems, and provides technology that reduces the complexity of the louver's shape and reduces the risk of increased noise.

The louvers disclosed herein include a first outer louver having a substantial C-shape in cross section in the short side direction, with a first opening of the substantial C-shape extending along the long side direction, a second outer louver having a substantial inverted C-shape in cross section in the short side direction, with a second opening of the substantial inverted C-shape extending along the long side direction, a hollow space formed by combining the first opening of the first outer louver and the second opening of the second outer louver in an opposing relationship, and a first lower end of the first opening of the first outer louver. , a blow-out opening formed by opposing the second lower end of the second opening of the second outer louver, a first inner louver installed on the first outer louver and guiding the air flowing through the hollow space to the blow-out opening in a cross-sectional view in the short side direction, a second inner louver installed on the second outer louver and guiding the air flowing through the hollow space to the blow-out opening in a cross-sectional view in the short side direction, and a plurality of fins that divide a portion of the hollow space into a plurality of spaces in the longitudinal direction and keep the opening width of the blow-out opening constant.

Furthermore, the first lower end of the first outer louver and the second lower end of the second outer louver are each erected vertically upward to form the air outlet opening, and the first inner louver has a first lower end that is in surface contact with the first lower end of the first outer louver, a first upper end that is in surface contact with a first outer side surface that faces the first lower end of the first outer louver, and a first straightening portion that connects the first lower end and the first upper end.

The second inner louver also has a second lower end that is in surface contact with the second lower end of the second outer louver, a second upper end that is in surface contact with a second outer side surface that faces the second lower end of the second outer louver, and a second straightening portion that connects the second lower end and the second upper end.

Next, the air blower of the present disclosure is a blower that includes a plurality of the louvers described above and a blower that blows air to each of the plurality of louvers, the plurality of louvers are arranged side by side with gaps between them so that the lower surfaces of the blowing openings of each of the plurality of louvers are positioned on the same plane, and the air blower is configured so that induced air, which is attracted by the blown air blown from the blowing openings, passes through the gaps.

This disclosure makes it possible to reduce the complexity of the louver's shape and reduce the risk of increased noise.

FIG. 1A is a perspective view showing the structure of a louver according to an embodiment. FIG. 1B is an exploded perspective view of the components of the louver. FIG. 2 is a cross-sectional view in the short side direction of a louver according to the embodiment. FIG. 3A is a perspective view of the first inner louver. FIG. 3B is a perspective view of the second inner louver. FIG. 3C is a cross-sectional view in the short direction of the inner louver member. FIG. 4A is a schematic diagram of a fin. FIG. 4B is an enlarged perspective view of the portion where the fin is inserted into the inner louver member. FIG. 5 is a schematic diagram showing the airflow path within the louvers. FIG. 6 is a schematic perspective view of a blower using a plurality of louvers according to an application example. FIG. 7 is a front view showing the flow of air current in the blower device. FIG. 8A is a schematic perspective view of a connected louver in which two louvers are connected. FIG. 8B is an enlarged perspective view of a connecting portion of the connecting louver.

Below, the embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of matters that are already well known, or duplicate explanations of substantially identical configurations may be omitted. This is to avoid making the following explanation unnecessarily redundant and to make it easier for those skilled in the art to understand.

The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment)
(1. Overall structure of the louver)
Hereinafter, a louver 1 according to an embodiment of the present disclosure will be described with reference to FIGS. 1A, 1B, and 2. FIG.

FIG. 1A is a perspective view showing the structure of louver 1, FIG. 1B is an exploded perspective view of the components of louver 1, and FIG. 2 is a cross-sectional view of louver 1 in the short direction.

Here, as shown in Figures 1A and 1B, a Cartesian coordinate system is defined that includes an x-axis, a y-axis, and a z-axis. The x-axis and the y-axis are mutually orthogonal. The z-axis is perpendicular to the x-axis and the y-axis, and extends in the vertical direction of the louver 1. Furthermore, the positive directions of the x-axis, y-axis, and z-axis are defined as the directions of the arrows in Figures 1A and 1B, and the negative directions are defined as the directions opposite to the arrows.

Here, the positive direction of the x-axis is sometimes referred to as "forward" or "front side", the negative direction of the x-axis as "rear" or "rear side", the positive direction of the y-axis as "right" or "right side", the negative direction of the y-axis as "left" or "left side", the positive direction of the z-axis as "upward" or "upper side", and the negative direction of the z-axis as "downward" or "lower side". Therefore, it can be said that the x-axis extends in the front-to-back direction, the y-axis extends in the left-to-right direction, and the z-axis extends in the up-down direction. Furthermore, the x-axis corresponds to the longitudinal direction, and at least one of the y-axis and z-axis corresponds to the lateral direction. In this embodiment, such a Cartesian coordinate system is defined.

The louver 1 in this embodiment is a member that is connected to a fan and that linearly discharges the airflow from the fan. As shown in FIG. 2, the louver 1 that extends in the longitudinal direction has a hollow structure (hollow space 2 described later) and has an air outlet 3 on the lower side. Inside the louver 1, an inner louver member (first inner louver 30 and second inner louver 40 described later) that has a substantially V-shape (effectively V-shape) in cross section in the short direction and extends in the longitudinal direction is arranged. The inner louver member guides the air flowing inside the louver 1 in the longitudinal direction to the tip of the substantially V-shape, and discharges the guided air to the outside through the air outlet 3 formed corresponding to the lower tip.

Specifically, as shown in Figures 1A and 1B, the louver 1 is composed of a first outer louver 10, a second outer louver 20, a first inner louver 30, a second inner louver 40, a number of fins 50, and a top plate 60. As will be described in detail later, the first outer louver 10 and the second outer louver 20 can be combined from the left and right directions.

(1.1 Configuration of outer louver member)
The outer louver member, which is a combination of the first outer louver 10 and the second outer louver 20, has a rectangular prism shape extending in the front-to-rear direction and has a hollow space 2 (see FIG. 2) inside. In the hollow space 2, a first inner louver 30 and a second inner louver 40 are provided as inner louver members symmetrically as viewed in the front-to-rear direction, and air flowing through the hollow space 2 is guided to the outlet opening 3 by a plurality of fins 50 attached to the inner louver member.

The first outer louver 10 is one of the components that make up the outer housing of the louver 1. As shown in Figures 1B and 2, the first outer louver 10 includes a plate-shaped upper surface 11 (formed on a surface parallel to the x-y plane) that extends in the front-rear and left-right directions, a plate-shaped outer side surface 12 (first outer side surface) (formed on a surface parallel to the x-z plane) that extends in the front-rear and up-down directions from the lower side of the left end of the upper surface 11, and a lower surface 13 (formed on a surface parallel to the x-y plane) that extends in the front-rear and left-right directions from the right side of the bottommost part of the outer side surface 12.

The first outer louver 10 also includes a plate-shaped lower end 14 (first lower end) (formed on a plane parallel to the x-z plane) that spreads in the front-to-rear and up-down directions from the upper side of the right end of the lower surface 13. In other words, the upper surface 11 and the lower surface 13 of the first outer louver 10 are configured to face each other. Also, the outer side surface 12 and the lower end 14 of the first outer louver 10 are configured to face each other.

Therefore, the first outer louver 10 has an approximately C-shape (substantially C-shape) in a cross-sectional view in the y-z plane, and has an approximately C-shaped opening 17 (first opening) extending along the front-rear direction (longitudinal direction). The opening 17 is formed between the upper end 16, which is the right end of the upper surface 11, and the upper end of the lower end 14. In other words, the first outer louver 10 has an approximately C-shape in a cross-section in the short side direction, and has an approximately C-shaped opening 17 extending along the longitudinal direction. In this way, the first outer louver 10 has a simple structure having a plate-like shape (made up of plate-shaped members), and can be easily manufactured by processing sheet metal members.

The second outer louver 20 is one of the components that make up the outer housing of the louver 1. As shown in Figures 1B and 2, the second outer louver 20 includes a plate-shaped upper surface 21 (formed on a surface parallel to the x-y plane) that extends in the front-rear and left-right directions, a plate-shaped outer side surface 22 (second outer side surface) (formed on a surface parallel to the x-z plane) that extends in the front-rear and up-down directions from the lower side of the right end of the upper surface 21, and a lower surface 23 (formed on a surface parallel to the x-y plane) that extends in the front-rear and left-right directions from the left side of the bottommost part of the outer side surface 22.

The second outer louver 20 also includes a plate-shaped lower end 24 (second lower end) (formed on a plane parallel to the x-z plane) that spreads in the front-to-rear and up-down directions from the upper side of the left end of the lower surface 23. In other words, the upper surface 21 and the lower surface 23 of the second outer louver 20 are configured to face each other. Also, the outer side surface 22 and the lower end 24 of the second outer louver 20 are configured to face each other.

Therefore, the second outer louver 20 has a substantially inverted C-shape (effectively an inverted C-shape) in a cross-sectional view in the y-z plane, and has an approximately inverted C-shaped opening 27 (second opening) extending along the front-rear direction (longitudinal direction). The opening 27 is formed between the upper end 26, which is the left end of the upper surface 21, and the upper end of the lower end 24. In other words, the second outer louver 20 has a substantially inverted C-shape in a cross-section in the short side direction, and has an approximately inverted C-shaped opening 27 extending along the longitudinal direction. In this way, the second outer louver 20 has a simple structure having a plate-like shape (made up of plate-shaped members), and can be easily manufactured by processing sheet metal members.

The first outer louver 10 and the second outer louver 20 are substantially symmetrical with respect to the z-axis when viewed in cross section in the short side direction.

As shown in FIG. 2, in the louver 1, the upper surface 21 of the second outer louver 20 is placed on top of and in contact with the upper surface 11 of the first outer louver 10, and the lower end 14 of the first outer louver 10 and the lower end 24 of the second outer louver 20 are closely opposed to each other. This combines the first outer louver 10 and the second outer louver 20. Note that either the upper surface 11 of the first outer louver 10 or the upper surface 21 of the second outer louver 20 may be on top.

In other words, the top surface 11 of the first outer louver 10 and the top surface 21 of the second outer louver 20 are arranged parallel to each other and are configured to be in surface contact in the up-down direction. Here, surface contact refers to a state in which the two components overlap uniformly (over substantially the entire area) in the longitudinal direction (x-axis) and by 10 mm or more in the short direction (y-axis) when viewed from the perpendicular direction (z-axis direction or -z-axis direction) of the contact surface.

On the other hand, in the louver 1, the lower end 14 of the first outer louver 10 and the lower end 24 of the second outer louver 20 are arranged so as to be parallel to each other with a predetermined distance in cross section in the short direction (see FIG. 2). As a result, by combining the first outer louver 10 and the second outer louver 20, it is possible to form a louver 1 having a substantially rectangular prism shape (including a rectangular prism shape) extending in the front-to-rear direction. A hollow space 2 is formed inside the louver 1 formed by this combination. In other words, the hollow space 2 is formed by combining the opening 17 of the first outer louver 10 and the opening 27 of the second outer louver 20 so that they face each other.

In the louver 1, when the first outer louver 10 and the second outer louver 20 are combined, the first outer louver 10 and the second outer louver 20 are fixed by fastening using screws at the threaded portion 18 provided on the upper surface 11 and the threaded portion 28 provided on the upper surface 21 (see Figures 1A and 1B).

In addition, in the louver 1, when the first outer louver 10 and the second outer louver 20 are combined, the lower end 14 of the first outer louver 10 and the lower end 24 of the second outer louver 20 are arranged parallel to each other with a predetermined gap between them (see FIG. 2). As a result, the opening lower end 15, which is the lower end of the lower end 14 of the first outer louver 10, and the opening lower end 25, which is the lower end of the lower end 24 of the second outer louver 20, are arranged at a distance from each other, and the blow-out opening 3 is formed in this spaced apart portion.

In other words, the blow-out opening 3 is formed by opposing the lower end 14 of the first outer louver 10 to the lower end 24 of the second outer louver 20. In other words, the lower end 14 of the first outer louver 10 and the lower end 24 of the second outer louver 20 form end faces in a state where they are erected vertically upward from the lower surface 13 and the lower surface 23, respectively, and constitute the blow-out opening 3.

The air outlet 3, which will be described in detail later, is a slit-shaped opening that extends in the x-axis direction when the outer louver member is viewed in the z-axis direction from below, and blows out air circulating through the air passage 4 inside the hollow space 2 to the outside. It is also referred to as an "air outlet." The air outlet 3 has a shape that extends along the longitudinal direction (x-axis direction).

Also, as shown in Figures 1A and 1B, when the first outer louver 10 and the second outer louver 20 are combined, the end of the front y-z surface is open, and the end of the rear y-z surface is sealed by a plate-shaped top plate 60.

When the first outer louver 10 and the second outer louver 20 are combined, the front opening is connected to a fan (not shown), and the airflow from the fan enters the hollow space 2 from the front opening. Therefore, an air passage 4 leading to the blowing opening 3 is arranged in the hollow space 2.

The top plate 60 is a member that closes one of the openings (e.g., the rear opening) at both ends of the longitudinal direction of the louver 1. The top plate 60 is fixed to the first outer louver 10 and the second outer louver 20 by screwing or the like.

(1.2 Configuration of inner louver member)
Next, the inner louver members (first inner louver 30 and second inner louver 40) that guide the air circulating inside the louver 1 toward the air outlet opening 3 will be described with reference to FIG. 2 and FIG. 3A to FIG. 3C.

FIG. 3A is a perspective view of the first inner louver 30, FIG. 3B is a perspective view of the second inner louver 40, and FIG. 3C is a cross-sectional view of the inner louver member in the short direction.

In the louver 1, a first inner louver 30 and a second inner louver 40 are installed relative to the first outer louver 10 and the second outer louver 20, respectively, as inner louver members that guide the air circulating inside toward the air outlet opening 3.

The first inner louver 30 is a member that is attached to the first outer louver 10. As shown in Figures 2, 3A, and 3C, the first inner louver 30 has three straight portions in a cross-sectional view in the y-z plane, and is configured to extend in the front-to-rear direction. Specifically, the first inner louver 30 is configured to have a first lower end portion 31, a first upper end portion 32, and a first straightening portion 33.

The first lower end 31 has a plate-like shape that extends in the front-rear and up-down directions and is parallel to the x-z plane. As shown in FIG. 2, the first lower end 31 is the portion of the first inner louver 30 that comes into surface contact with the lower end 14 of the first outer louver 10.

The first upper end 32 has a plate-like shape that extends in the front-rear and up-down directions and is parallel to the x-z plane. As shown in FIG. 2, the first upper end 32 is the portion of the first inner louver 30 that comes into surface contact with the outer side surface 12 of the first outer louver 10.

The first straightening portion 33 connects the top of the first lower end 31 and the bottom of the first upper end 32 in a cross-sectional view in the y-z plane, and has a plate-like shape that extends in the front-to-rear direction. The first straightening portion 33 is a portion on the first inner louver 30 side of the inner louver member that guides the air flowing inside the louver 1 toward the outlet opening 3. The first straightening portion 33 has multiple first slits 34 at predetermined intervals in the front-to-rear direction for inserting fins 50 (described later) in the -z axis direction (downward) (see FIG. 3A).

The first slit 34 is provided in the first straightening section 33 and is provided on the first lower end 31 side of the first straightening section 33, that is, up to the top of the first lower end 31. The fin 50 is inserted into the first slit 34 (see Figures 1B and 2).

As described above, the first inner louver 30 is configured to have a first lower end portion 31 that is in surface contact with the lower end portion 14 of the first outer louver 10, a first upper end portion 32 that is in surface contact with the outer side surface 12 that faces the lower end portion 14 of the first outer louver 10, and a first straightening portion 33 that connects the first lower end portion 31 and the first upper end portion 32.

As described above, the first inner louver 30 has a simple structure formed in a plate shape, and can be easily manufactured by processing sheet metal members. The first inner louver 30 is installed on the first outer louver 10, and has the function of directing air circulating through the hollow space 2 to the air outlet opening 3 when viewed in cross section in the short side direction.

The second inner louver 40 has a structure (mirror image) that is substantially symmetrical with the first inner louver 30 with respect to the z-axis when viewed in cross section in the short direction.

The second inner louvers 40 are components attached to the second outer louvers 20. As shown in Figures 2, 3B, and 3C, the second inner louvers 40 have three straight line portions in a cross-sectional view in the y-z plane (cross-sectional view in the short direction) and are configured to extend in the front-to-rear direction. Specifically, the second inner louvers 40 are configured to have a second lower end portion 41, a second upper end portion 42, and a second straightening portion 43.

The second lower end 41 has a plate-like shape that extends in the front-rear and up-down directions and is parallel to the x-z plane. As shown in FIG. 2, the second lower end 41 is the portion of the second inner louver 40 that comes into surface contact with the lower end 24 of the second outer louver 20.

The second upper end 42 has a plate-like shape that extends in the front-rear and up-down directions and is parallel to the x-z plane. As shown in FIG. 2, the second upper end 42 is the portion of the second inner louver 40 that comes into surface contact with the outer side surface 22 of the second outer louver 20.

The second straightening portion 43 connects the top of the second lower end 41 and the bottom of the second upper end 42 in a cross-sectional view in the y-z plane, and has a plate-like shape that extends in the front-to-rear direction. The second straightening portion 43 is a portion on the second inner louver 40 side of the inner louver member that guides the air flowing inside the louver 1 toward the outlet opening 3. The second straightening portion 43 has a plurality of second slits 44 at predetermined intervals in the front-to-rear direction for inserting fins 50 (described later) in the -z axis direction (downward) (see FIG. 3B).

The second slit 44 is provided in the second straightening section 43 and is provided on the second lower end 41 side of the second straightening section 43, that is, up to the top of the second lower end 41. The fin 50 is inserted into the second slit 44 (see Figures 1B and 2).

Here, the first slit 34 and the second slit 44 are provided at positions that are linearly symmetrical to each other across the air outlet 3 when viewed in the longitudinal direction, and are configured so that one (common) fin 50 is inserted through them.

As described above, the second inner louver 40 is configured to have a second lower end portion 41 that is in surface contact with the lower end portion 24 of the second outer louver 20, a second upper end portion 42 that is in surface contact with the outer side surface 22 that faces the lower end portion 24 of the second outer louver 20, and a second straightening portion 43 that connects the second lower end portion 41 and the second upper end portion 42.

As such, the second inner louvers 40 have a simple structure formed in a plate shape, and can be easily manufactured by processing sheet metal members. The second inner louvers 40 are installed on the second outer louvers 20, and have the function of directing air circulating through the hollow space 2 to the air outlet openings 3 when viewed in cross section in the short side direction.

When the first outer louver 10 and the second outer louver 20 are combined, the air outlet opening 3 is disposed below the inner louver member as shown in FIG. 3C. In a cross-sectional view in the short side direction, the first inner louver 30 and the second inner louver 40 are disposed symmetrically with respect to the air outlet opening 3. In other words, in a cross-sectional view in the short side direction, the first lower end portion 31 and the second lower end portion 41, the first upper end portion 32 and the second upper end portion 42, and the first straightening portion 33 and the second straightening portion 43 are each disposed symmetrically with respect to the air outlet opening 3.

Furthermore, in the louver 1, as shown in Figures 2 and 3C, in a cross-sectional view in the y-z plane, the first and second

flow straightening sections

33 and 43 of the inner louver member are configured so that the hollow space 2 gradually narrows toward the air outlet opening 3. In other words, the distance between the top of the first lower end 31 and the top of the second lower end 41 is narrower than the distance between the bottom of the first upper end 32 and the bottom of the second upper end 42. In other words, the separation distance between the first lower end 31 and the second lower end 41 is configured to be smaller than the separation distance between the first upper end 32 and the second upper end 42.

(1.3 Fin Configuration)
Next, the fins 50 attached to the inner louver members (first inner louvers 30 and second inner louvers 40) will be described with reference to Figs. 2, 4A and 4B.

FIG. 4A is a schematic diagram of the fin 50, and FIG. 4B is an enlarged perspective view of the portion of the fin 50 that is inserted into the inner louver member.

The fins 50 are installed at multiple locations along the length of the inner louver member, and serve to divide a portion of the hollow space 2 (the space portion where the first inner louver 30 and the second inner louver 40 are arranged opposite each other) into multiple parts along the length, while also maintaining a constant opening width of the air outlet 3.

Specifically, as shown in FIG. 4A, the fin 50 has a plate-like shape (parallel to the y-z plane) that extends in the vertical and horizontal directions. The vertical length of the fin 50 is slightly shorter than the combined vertical length of the first lower end 31 and the first straightening portion 33 of the first inner louver 30 (see FIG. 2).

As shown in FIG. 4A, the fin 50 has a first inner contact portion 51, a second inner contact portion 52, a first protruding portion 53, a second protruding portion 54, a first notch portion 55, and a second notch portion 56.

The first inner contact portion 51 is part of the upper edge of the fin 50 on the first inner louver 30 side (left side) when viewed from the front. As shown in FIG. 2, the first inner contact portion 51 is machined at an angle that is parallel to the plane of the first straightening portion 33 of the first inner louver 30, and when the fin 50 is attached to the inner louver member, the entire first inner contact portion 51 is fixed in close contact with the first straightening portion 33.

The second inner contact portion 52 is part of the upper edge of the fin 50 on the second inner louver 40 side (right side) when viewed from the front. As shown in FIG. 2, the second inner contact portion 52 is machined at an angle parallel to the plane of the second straightening portion 43 of the second inner louver 40, and when the fin 50 is attached to the inner louver member, the entire second inner contact portion 52 is fixed in close contact with the second straightening portion 43.

As shown in FIG. 4A, the first protrusion 53 protrudes in a triangular shape in a direction extending to the left of the extension line of the first inner contact portion 51. As a result, when the fin 50 is inserted from above into the first slit 34 of the first inner louver 30, the first protrusion 53 protrudes to the back side of the first straightening portion 33 (the side not facing the hollow space 2) as shown in FIG. 2.

In other words, the first protrusion 53 serves as a mechanism for preventing the fin 50 from slipping out upward and coming off the first slit 34 when the fin 50 is inserted from above into the first slit 34 of the first inner louver 30.

As shown in FIG. 4A, the second protrusion 54 protrudes in a triangular shape in a direction extending to the right of the extension line of the second inner contact portion 52. As a result, when the fin 50 is inserted from above into the second slit 44 of the second inner louver 40, the second protrusion 54 protrudes to the back side of the second straightening portion 43 (the side not facing the hollow space 2) as shown in FIG. 2 and FIG. 4B.

In other words, the second protrusion 54 acts as a mechanism for preventing the fin 50 from slipping out of the second slit 44 upward when the fin 50 is inserted from above into the second slit 44 of the second inner louver 40.

The shapes of the first protrusion 53 and the second protrusion 54 are not limited to the triangular shape described above, and may be other shapes. In addition, various other means for preventing the first protrusion 53 and the second protrusion 54 can be used as the mechanism for preventing the first protrusion 53 and the second protrusion 54 from coming off.

The first cutout 55 is provided on the left side of the lower end of the fin 50, as shown in FIG. 4A. When the fin 50 is inserted from above into the first slit 34 of the first inner louver 30, the first cutout 55 is positioned to sandwich the lower end 14 of the first outer louver 10 and the first lower end 31 of the first inner louver 30, as shown in FIG. 2.

In other words, the first cutout 55 is processed to have a width approximately equal to the combined thickness of the lower end 14 of the first outer louver 10 and the first lower end 31 of the first inner louver 30. The vertical depth (length) of the first cutout 55 is slightly shorter than the length of the first lower end 31 of the first inner louver 30. In other words, the length is such that the lower end of the fin 50 does not come into contact with the lower surface 13 of the first outer louver 10. This improves the cleanability of the air outlet opening 3, and also improves safety since the fin 50 does not protrude outside the device.

The second cutout 56 is provided on the right side of the lower end of the fin 50, as shown in FIG. 4A. When the fin 50 is inserted from above into the second slit 44 of the second inner louver 40, the second cutout 56 is positioned to sandwich the lower end 24 of the second outer louver 20 and the second lower end 41 of the second inner louver 40, as shown in FIG. 2.

In other words, the second cutout 56 is processed to have a width approximately equal to the combined thickness of the lower end 24 of the second outer louver 20 and the second lower end 41 of the second inner louver 40. The vertical depth (length) of the second cutout 56 is slightly shorter than the length of the second lower end 41 of the second inner louver 40. In other words, the length is such that the lower end of the fin 50 does not come into contact with the lower surface 23 of the second outer louver 20. This improves the cleanability of the air outlet 3, and also improves safety since the fin 50 does not protrude outside the device.

To explain again, in the louver 1, as shown in Figures 2 and 4B, the fin 50 is inserted from the upper side of the first inner louver 30 and the second inner louver 40, penetrating the first slit 34 and the second slit 44, until the first protrusion 53 and the second protrusion 54 protrude from the first slit 34 and the second slit 44, respectively. Then, the first straightening portion 33 of the first inner louver 30 comes into contact with the first inner contact portion 51 of the fin 50, and the second straightening portion 43 of the second inner louver 40 comes into contact with the second inner contact portion 52 of the fin 50.

Furthermore, the lower end 14 of the first outer louver 10 and the first lower end 31 of the first inner louver 30 are inserted into the first cutout 55. The lower end 24 of the second outer louver 20 and the second lower end 41 of the second inner louver 40 are inserted into the second cutout 56.

The distance between the top of the first slit 34 and the top of the second slit 44 is configured to be a few millimeters smaller than the distance between the first protrusion 53 and the second protrusion 54 of the fin 50, so that simply by inserting the fin, the first protrusion 53 and the second protrusion 54 exert a retaining function, preventing the fin 50 from coming off the first inner louver 30 and the second inner louver 40.

Furthermore, the lower end 14 of the first outer louver 10 and the first lower end 31 of the first inner louver 30 are clamped in the first cutout 55, and the lower end 24 of the second outer louver 20 and the second lower end 41 of the second inner louver 40 are clamped in the second cutout 56. This limits the left-right positional shift of each component, and the width of the blow-out opening 3 can be kept constant. In other words, the distance between the opening lower end 15 of the first outer louver 10 and the opening lower end 25 of the second outer louver 20 can be kept constant.

The above-mentioned fins 50 are attached at multiple locations at predetermined intervals along the longitudinal direction of the louver 1. As a result, the first outer louver 10, second outer louver 20, first inner louver 30, and second inner louver 40 constituting the louver 1 interact with each other to be securely fixed over the entire longitudinal area. In addition, the distance between the opening lower end 15 of the first outer louver 10 and the opening lower end 25 of the second outer louver 20 can be kept constant over the entire longitudinal area.

In this way, the fins 50 divide a portion of the hollow space 2 (the space portion where the first inner louver 30 and the second inner louver 40 are arranged opposite each other) into multiple portions in the longitudinal direction, while maintaining a constant opening width of the air outlet opening 3.

(2. Air flow inside the louvers)
Next, with reference to FIG. 5, a description will be given of the flow of air circulating inside the louver 1 when the louver 1 is installed so that air from a fan (not shown) is introduced into the louver 1.

Figure 5 is a schematic diagram showing the airflow path inside the louver 1. Figure 5 shows the state in which air introduced into the inside of the louver 1 flows from the front side to the rear side (in the negative x-axis direction).

Louver 1 has a hollow space 2 inside. When air from the fan is introduced into louver 1, the air from the fan (airflow AF0) flows from the front to the rear in hollow space 2. In other words, hollow space 2 functions as an air passage 4 for airflow AF0.

Since the airflow AF0 is air (high-pressure air) that has been pressurized (compressed) by the fan, the airflow AF0 flowing through air passage 4 flows toward the atmospheric space, which has a lower pressure. In other words, the airflow AF0 flowing through air passage 4 passes through the blow-out opening 3 and is blown out into the atmospheric space.

More specifically, as shown in FIG. 5, when air (airflow AF0) is supplied from the front to the rear by a fan (not shown) into air passage 4, airflow AF0 is blown downward as blown airflow AF1 through outlet opening 3. At this time, due to the presence of multiple fins 50, each fin 50 exhibits a straightening function, and the air blown from outlet opening 3 can be blown more uniformly along the longitudinal direction than in the case where there are no fins 50.

In addition, as the airflow AF0 travels from the top to the bottom, the first and second straightening sections 33 and 34 (not shown in FIG. 5) gradually narrow the air passage width (the width of the hollow space 2) toward the outlet opening 3, suppressing flow disturbances and enabling air to be blown efficiently.

(3. Effects, etc.)
As described above, according to the louver 1 of the present embodiment, the following effects can be obtained.

(1) The louver 1 comprises a first outer louver 10 having an approximately C-shape (substantially C-shape) in cross section in the short side direction and an approximately C-shaped opening 17 (first opening) extending along the longitudinal direction, a second outer louver 20 having an approximately inverted C-shape (substantially inverted C-shape) in cross section in the short side direction and an approximately inverted C-shaped opening 27 (second opening) extending along the longitudinal direction, a hollow space 2 formed by combining the opening 17 of the first outer louver 10 and the opening 27 of the second outer louver 20 in an opposing relationship, and a lower end of the opening 17 of the first outer louver 10. The air outlet 3 is formed by opposing a lower end 14 (first lower end) of the first outer louver 10 to a lower end 24 (second lower end) of an opening 27 of the second outer louver 20, a first inner louver 30 that is installed on the first outer louver 10 and that, in a cross-sectional view in the short side direction, guides air flowing through the hollow space 2 to the air outlet 3, a second inner louver 40 that is installed on the second outer louver 20 and that, in a cross-sectional view in the short side direction, guides air flowing through the hollow space 2 to the air outlet 3, and a plurality of fins 50 that divide a part of the hollow space 2 into a plurality of spaces in the longitudinal direction and keep the opening width of the air outlet 3 constant. The lower end 14 of the first outer louver 10 and the lower end 24 of the second outer louver 20 are each erected vertically upward to form the air outlet 3. The first inner louver 30 has a first lower end 31 that is in surface contact with the lower end 14 of the first outer louver 10, a first upper end 32 that is in surface contact with the outer side surface 12 that faces the lower end 14 of the first outer louver 10, and a first straightening portion 33 that connects the first lower end 31 and the first upper end 32. The second inner louver 40 has a second lower end 41 that is in surface contact with the lower end 24 of the second outer louver 20, a second upper end 42 that is in surface contact with the outer side surface 22 that faces the lower end 24 of the second outer louver 20, and a second straightening portion 43 that connects the second lower end 41 and the second upper end 42.

By adopting such a configuration, the first outer louver 10 and the first inner louver 30 are fixed in surface contact, and the second outer louver 20 and the second inner louver 40 are fixed in surface contact, by a simple combination structure of each component. Therefore, when air is circulated through the louver 1, air leakage from the hollow space 2 formed inside can be suppressed, and an increase in noise caused by air leakage can be suppressed. In other words, the louver 1 can reduce the complexity of its shape and reduce the risk of increased noise.

In addition, each component (first outer louver 10, second outer louver 20, first inner louver 30, and second inner louver 40) can be manufactured from sheet metal parts that have no curved sections when viewed in cross section in the short direction, which simplifies the manufacturing process compared to conventional air blower cylinders (louvers) and reduces manufacturing costs by eliminating the need for molds, etc.

(2) The multiple fins 50 may be configured to be arranged so as to divide the portion of the hollow space 2 where the first inner louver 30 and the second inner louver 40 are arranged opposite each other into multiple spaces in the longitudinal direction.

With this configuration, the straightening function of the fins 50 allows the air blown from the outlet opening 3 to be blown more evenly along the longitudinal direction than in the absence of the fins 50.

(3) In the louver 1, the first and

second straightening sections

33 and 43 are arranged symmetrically with respect to each other across the air outlet 3 when viewed in cross section in the short side direction, and the hollow space 2 may be configured such that the width of the hollow space 2 gradually narrows toward the air outlet 3 due to the first and

second straightening sections

33 and 43 when viewed in cross section in the short side direction.

As a result, when the airflow AF0 moves from the top to the bottom, it is possible to suppress turbulence and the like, and a stable airflow AF1 can be blown out from the outlet 3. In other words, the louver 1 can efficiently blow the airflow AF1 out from the outlet 3.

(4) The vertical length of each of the multiple fins 50 may be shorter than the sum of the vertical lengths of the first lower end 31 and first straightening portion 33 of the first inner louver 30 and the sum of the vertical lengths of the second lower end 41 and second straightening portion 43 of the second inner louver 40, and may be such that the lower end of each of the multiple fins 50 does not come into contact with the lower surface 13 of the first outer louver 10 and the lower surface 23 of the second outer louver 20.

This configuration further improves the ease of cleaning the air outlet 3, and also improves safety since the fins 50 do not protrude outside the device.

(5) In the louver 1, the first inner louver 30 and the second inner louver 40 each have a plurality of first slits 34 and second slits 44 for inserting a plurality of fins 50, and each of the plurality of fins 50 may be provided with a mechanism for preventing the fins from falling out of the plurality of first slits 34 and second slits 44 of the first inner louver 30 and the second inner louver 40, respectively.

Furthermore, this prevents the fins 50 from coming off the first slits 34 and the second slits 44, so that the first outer louvers 10, the second outer louvers 20, the first inner louvers 30, and the second inner louvers 40 that make up the louver 1 interact with each other to securely fix them in place, thereby keeping the opening width of the air outlet 3 constant.

(6) Each of the multiple fins 50 has a first inner contact portion 51 configured to be parallel to the plane of the first straightening portion 33 of the first inner louver 30, a second inner contact portion 52 configured to be parallel to the plane of the second straightening portion 43 of the second inner louver 40, a first protrusion portion 53 that protrudes outward from the extension line of the first inner contact portion 51, and a second protrusion portion 54 that protrudes outward from the extension line of the second inner contact portion 52, and the anti-slip mechanism may be formed by the first protrusion portion 53 and the second protrusion portion 54.

This configuration makes it possible to realize an anti-disconnection mechanism with a simpler configuration.

(7) Each of the multiple fins 50 may have a first notch 55 provided at the lower end of each of the multiple fins 50 and configured to sandwich the first lower end 14 of the first outer louver 10 and the first lower end 31 of the first inner louver 30, and a second notch 56 provided at the lower end of each of the multiple fins 50 and configured to sandwich the second lower end 24 of the second outer louver 20 and the second lower end 41 of the second inner louver 40.

This configuration also limits the left-right positional deviation of each component, allowing the width of the air outlet opening 3 to be kept constant.

(4. Example of application to a blower)
Next, a blower device 100, which is an application example of the louver 1, will be illustrated with reference to FIG.

FIG. 6 is a schematic perspective view of a blower device 100 using multiple louvers 1 according to an application example.

The blower device 100 is placed in an indoor space such as an office, and generates an airflow that blows from one side of the space to the opposite side. The blower device 100 in this application example generates an airflow that blows from the ceiling surface side to the floor surface side.

Specifically, as shown in FIG. 6, the air blower 100 includes a plurality of louvers 1, an intake port 102, a blower 103, and an air passage (not shown). Note that in the application example, eight louvers 1 according to the embodiment are used as the plurality of louvers 1, but the number of louvers 1 in the present disclosure is not limited to this number.

Each of the multiple louvers 1 is installed so as to stand upright in the horizontal direction (x direction) from the wall surface 101. The end of each of the multiple louvers 1 on the wall surface 101 side is connected to the wall surface 101 so that air is introduced from the blower 103 via an air passage. The end of each louver 1 opposite the wall surface 101 is blocked by a top plate 60.

The multiple louvers 1 are arranged so that, in a cross-section of the short side of each louver 1 (cross-section of the y-z plane), the undersides of the air outlets 3 of each louver 1 (a linear surface in the longitudinal direction having a predetermined width) are located in the same plane (in this example, in a plane parallel to the x-y plane) (see Figure 7). The multiple louvers 1 are also arranged parallel to each other in the x-axis direction with a predetermined distance between them in the y-axis direction. In other words, the multiple louvers 1 are arranged side by side with gaps between them so that the undersides of the respective air outlets 3 are located on the same plane.

The intake port 102 is an opening for taking in air into the interior of the wall surface 101. The intake port 102 is located below the wall surface 101, and draws in air in the space in front of the intake port 102. Here, the "below" position where the intake port 102 is provided on the wall surface 101 refers to the area on the wall surface 101 that is closer to the floor than the head of a person seated in an indoor space, and more specifically, refers to the area on the wall surface 101 that is 130 cm above the floor. The intake port 102 is rectangular, for example, as shown in FIG. 7.

The blower 103 is a known turbo machine such as a centrifugal blower. The blower 103 is installed inside the wall surface 101, and blows air drawn in from the suction port 102 to each of the multiple louvers 1 through an air passage inside the wall surface 101. In this application example, four blowers 103 are installed, and the airflow generated by one blower 103 is transported to two louvers 1. The blowers 103 may also be installed outside the wall surface 101 (for example, in the space on the opposite side of the wall surface 101 from the side on which the louvers 1 are installed).

Next, the air flow in a blower device 100 using multiple louvers 1 according to an application example will be described with reference to FIG. 7.

FIG. 7 is a front view showing the airflow in the blower device 100.

When the blower 103 in the blower device 100 starts blowing air, air is sucked in through the intake port 102, and the sucked air is supplied to each of the multiple louvers 1.

The air supplied to the louver 1 (airflow AF0 described above) flows through the inside of the louver 1 (hollow space 2) and is blown out from the outlet opening 3 as the outlet airflow AF1. When the outlet airflow AF1 is blown out from the outlet opening 3, an induced airflow AF2 is generated in the gaps between the louvers 1 as it is pulled by the outlet airflow AF1. The outlet airflow AF1 and the induced airflow AF2 then combine to generate an airflow AF3 that is linear overall. In other words, the blower device 100 can blow out the downflow airflow AF3 as a surface airflow with a uniform wind speed distribution.

As described above, the blower device 100 using multiple louvers 1 according to this application example can provide the following effects.

(8) The blower device 100 includes a plurality of louvers 1 and a blower 103 that blows air to each of the plurality of louvers 1. The plurality of louvers 1 are arranged side by side with gaps between them so that the lower surfaces of the blow-out openings 3 of the plurality of louvers 1 are positioned on the same plane, and are configured so that an induced airflow AF2 induced by the blow-out airflow AF1 blown from the blow-out openings 3 passes through the gaps.

This allows the blower device 100 to generate a uniform airflow AF3 (surface airflow) with no unevenness in wind speed.

(9) In addition, the multiple louvers 1 may be attached to the wall surface 101, and the intake port 102, which is an opening for taking in air, may be attached to an area of the wall surface 101 at a height of 130 cm or less from the floor surface.

Furthermore, with this configuration, the air inlet 102 can be installed closer to the floor than the head of a seated person in an indoor space, allowing for efficient air circulation or air conditioning, etc.

(5. Modifications)
In the blower device 100 using multiple louvers 1 in the application example, eight louvers 1 are arranged in parallel, but in order to increase the longitudinal length of the louvers 1, each of the multiple louvers 1 may be formed by connecting multiple (for example, two) louvers 1 to form an air passage 4 (hollow space 2).

Below, a modified example of such a connecting louver 1x will be described using Figures 8A and 8B.

FIG. 8A is a schematic perspective view of a connecting louver 1x that connects two

louvers

1a and 1b, and FIG. 8B is an enlarged perspective view of the connecting portion of the connecting louver 1x.

As shown in FIG. 8A, connecting louver 1x is configured by connecting end 70a of louver 1a and end 70b of louver 1b, which are opposed in the longitudinal direction (x direction). Louver 1a and louver 1b basically have the same structure as louver 1 according to the embodiment. In the example of FIG. 8A, the end opposite end 70a of louver 1a is blocked by top plate 60a, and louver 1b does not have a top plate 60 and is configured so that air is supplied from the end opposite end 70b.

More specifically, as shown in FIG. 8B, the connecting louver 1x has a connecting member 71b attached to end 70b of louver 1b, which protrudes longitudinally from the inside of end 70b. By inserting and connecting this connecting member 71b into the inside of end 70a of louver 1a, louver 1a and louver 1b are connected and fixed together. This also connects the hollow spaces 2 together. Note that the configuration of the connecting member is not limited to the above example, and a configuration in which the ends are connected from the outside, or various other configurations, can be used.

Here, end 70a of louver 1a corresponds to the "longitudinal end of one outer louver member composed of a first outer louver and a second outer louver" in the claims, and end 70b of louver 1b corresponds to the "longitudinal end of the other outer louver member" in the claims. In other words, in the connecting louver 1x, the longitudinal end of one of the first outer louver and the second outer louver can be said to be configured to be connectable to the longitudinal end of the other of the first outer louver and the second outer louver via a connecting member.

As described above, the modified connecting louver 1x provides the following advantages.

(10) The connecting louver 1x may be configured by connecting an end 70a of a louver 1a (the longitudinal end of one outer louver member composed of a first outer louver 10 and a second outer louver 20) to an end 70b of another louver 1b (the longitudinal end of another outer louver member) via a connecting member 71b.

As a result, it is possible to construct louvers with different lengths in the longitudinal direction using the basic drawing for one louver, and the length can be freely set for each installation environment of the louvers. In this case, by connecting louvers of a length that can be manufactured in one go using sheet metal parts, it is possible to manufacture connected louvers 1x of the required length at low cost.

(11) The connecting member 71b may be a member that is provided at the longitudinal end 70a of one outer louver member, protrudes in the longitudinal direction, and is inserted into the inside of the end 70b of the other outer louver member.

This configuration also makes it possible to create a connecting louver 1x with a simple structure and good design.

As described above, the embodiments, application examples, and modifications have been described as examples of the technology disclosed in this application. However, the technology in this disclosure is not limited to these, and can be applied to forms in which changes, substitutions, additions, omissions, etc. have been made. It is also possible to combine the components described in the above embodiments, application examples, and modifications to create new embodiments. Note that the above-described embodiments are intended to illustrate the technology in this disclosure, and various changes, substitutions, additions, omissions, etc. can be made within the scope of the claims or their equivalents.

This disclosure reduces the complexity of the shape of louvers that blow out airflow, and is applicable to louvers that have the risk of increasing noise.

REFERENCE SIGNS

LIST

1, 1a, 1b Louver 1x Connecting louver 2 Hollow space 3 Air outlet opening 4 Air passage 10 First outer louver 11 Upper surface 12 Outer side surface 13 Lower surface 14 Lower end 15 Opening lower end 16 Upper end 17 Opening 18 Screw section 20 Second outer louver 21 Upper surface 22 Outer side surface 23 Lower surface 24 Lower end 25 Opening lower end 26 Upper end 27 Opening 28 Screw section 30 First inner louver 31 First lower end 32 First upper end 33 First flow straightening section 34 First slit 40 Second inner louver 41 Second lower end 42 Second upper end 43 Second flow straightening section 44 Second slit 50 Fin 51 First inner contact section 52 Second inner contact section 53 First protrusion 54 Second protrusion 55 First notch 56 Second notch 60 Top plate

60a Top plate

70a, 70b End 71b Connecting member 100 Blower device 101 Wall surface 102 Intake port 103 Blower AF0 Air flow AF1 Discharge air flow AF2 Induced air flow AF3 Air flow

Claims

a first outer louver having a substantially C-shape in a cross-sectional view in a short side direction, and a first opening of the substantially C-shape extending along a long side direction;
a second outer louver having a substantially inverted C-shape in a cross-sectional view in the short side direction, and a second opening of the substantially inverted C-shape extending along the long side direction;
a hollow space formed by combining the first opening of the first outer louver and the second opening of the second outer louver in an opposing relationship;
an air outlet formed by opposing a first lower end of the first opening of the first outer louver and a second lower end of the second opening of the second outer louver;
a first inner louver that is installed on the first outer louver and that guides air circulating through the hollow space to the outlet opening in a cross-sectional view in the short side direction;
A second inner louver is installed on the second outer louver and guides the air flowing through the hollow space to the air outlet opening in a cross-sectional view in the short side direction.
A plurality of fins that divide a portion of the hollow space into a plurality of spaces in the longitudinal direction and maintain a constant opening width of the blow-out opening;
Equipped with
the first lower end portion of the first outer louver and the second lower end portion of the second outer louver are each erected vertically upward to form the blow-out opening,
the first inner louver has a first lower end portion in surface contact with the first lower end portion of the first outer louver, a first upper end portion in surface contact with a first outer side surface facing the first lower end portion of the first outer louver, and a first straightening portion connecting the first lower end portion and the first upper end portion,
The second inner louver has a second lower end portion in surface contact with the second lower end portion of the second outer louver, a second upper end portion in surface contact with a second outer side surface facing the second lower end portion of the second outer louver, and a second straightening portion connecting the second lower end portion and the second upper end portion.
louver.
The plurality of fins are arranged so as to divide a space portion in which the first inner louver and the second inner louver are arranged opposite to each other in the hollow space into the plurality of spaces in the longitudinal direction.
The louver of claim 1 .
The first and second rectifying portions are arranged symmetrically with respect to each other across the outlet opening in a cross-sectional view in the short side direction,
The hollow space is configured such that, in a cross-sectional view in the short side direction, a width of the hollow space is gradually narrowed toward the air outlet opening by the first rectifying portion and the second rectifying portion.
The louver of claim 1 .
the vertical length of each of the plurality of fins is shorter than the sum of the vertical lengths of the first lower end portion and the first straightening portion of the first inner louver and the sum of the vertical lengths of the second lower end portion and the second straightening portion of the second inner louver, and the lower end of each of the plurality of fins is not in contact with the lower surface of the first outer louver and the lower surface of the second outer louver.
The louver of claim 1 .
the first inner louver and the second inner louver each have a plurality of slits into which the plurality of fins are inserted,
Each of the plurality of fins is provided with a mechanism for preventing the first inner louver and the second inner louver from coming out of each of the plurality of slits.
The louver of claim 1 .
Each of the plurality of fins is
A first inner contact portion configured to be parallel to a plane of the first flow straightening portion of the first inner louver;
A second inner contact portion configured to be parallel to a plane of the second flow straightening portion of the second inner louver;
a first protruding portion protruding outward from an extension line of the first inner contact portion;
a second protruding portion protruding outward from an extension line of the second inner contact portion,
The fall-off prevention mechanism is constituted by the first protrusion and the second protrusion.
The louver of claim 5.
Each of the plurality of fins is
a first cutout portion provided at a lower end of each of the plurality of fins and configured to sandwich the first lower end of the first outer louver and the first lower end of the first inner louver;
a second cutout portion provided at the lower end portion of each of the plurality of fins and configured to sandwich the second lower end portion of the second outer louver and the second lower end portion of the second inner louver;
The louver of claim 1 .
an end portion in the longitudinal direction of one outer louver member composed of the first outer louver and the second outer louver is configured to be connectable to an end portion in the longitudinal direction of another outer louver member via a connecting member;
The louver of claim 1 .
the connecting member is a member provided at an end portion of the one outer louver member in the longitudinal direction, protruding in the longitudinal direction, and inserted into an inner side of an end portion of the other outer louver member;
The louver of claim 8.
A plurality of louvers according to claim 1 are provided,
A fan is provided to blow air to each of the plurality of louvers,
The plurality of louvers are arranged side by side with gaps therebetween so that the lower surfaces of the air outlet openings of the respective louvers are positioned on the same plane,
The gap is configured so that induced air induced by the blown air blown from the blowing opening passes through the gap.
Blower device.
The plurality of louvers are attached to a wall surface,
The air intake, which is an opening for taking in air, is attached to an area of the wall at a height of 130 cm or less from the floor surface.
The blower device according to claim 10.