Wind direction adjustment device

Abstract

To provide a wind direction adjustment device that improves airflow distribution performance using fins. [Solution] The wind direction adjustment device 1 comprises a case body 3 that partitions an air passage 5 inside and has an outlet 9 for blowing out air that has passed through the air passage 5, and a downstream fin 21 that has a pivot axis A2 in a predetermined direction intersecting the airflow direction of the air passage 5 and is rotatably positioned in the air passage 5 facing the outlet 9. The case body 3 has inclined portions 11 on its inner surfaces facing each other in a predetermined direction, which are inclined toward the outlet 9 in a direction intersecting the airflow direction and the predetermined direction. The downstream fin 21 has an inclined surface 30 that is inclined along the inclined portion 11 at a position opposite to each inclined portion 11. The inclined portion 11 has a constant gap portion 32 that is shaped so that the gap with the inclined surface 30 is substantially constant within the rotation range of the downstream fin 21.

Description

Technical Field

[0001] The present invention relates to an air direction adjusting device provided with fins rotatably arranged in an air passage facing an air outlet.

Background Art

[0002] Conventionally, in an air direction adjusting device, a case body partitioning the inside of an air passage has an inclined portion that tapers vertically from the upstream side of the air passage toward the air outlet which is the downstream end, and by distributing air in the vertical direction by these inclined portions and horizontal fins arranged in the air passage, while ensuring the air distribution performance in the vertical direction, the air outlet is made horizontally long and less conspicuous (for example, see Patent Document 1).

[0003] In such an air direction adjusting device, for air distribution in the left - right direction, vertical fins are provided. The vertical fins are preferably arranged facing the air outlet in order to suppress the diffusion of the air hitting the inclined portion. Further, in order to more effectively suppress the influence of the air hitting the inclined portion, it is desirable that the side edge portion on the downstream side of the vertical fin has a shape inclined along the upper and lower inclined portions.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the above - described configuration, when the vertical fins are swung left and right, the gap between the inclined portion and the inclined portion of the vertical fins becomes larger than when the vertical fins are in the neutral position, so that the air hits the inclined surface of the inclined portion, and there is a concern that air leakage occurs from the gap and the air diffuses.

[0006] This invention has been made in view of these points, and aims to provide a wind direction adjustment device that improves the airflow distribution performance using fins. [Means for solving the problem]

[0007] An airflow adjustment device according to an aspect of the present invention comprises a case body that partitions an air passage internally and has an outlet for blowing out air that has passed through the air passage, and a fin that has a pivot axis in a predetermined direction intersecting the airflow direction of the air passage and is rotatably arranged in the air passage facing the outlet, wherein the case body has inclined portions on its inner surfaces facing the predetermined direction, which are inclined toward the outlet in a direction intersecting the airflow direction and the predetermined direction, and the fin has an inclined surface inclined along the inclined portion at a position opposite to each inclined portion, and the inclined portion has a constant gap portion formed in such a shape that the gap with the inclined surface is substantially constant within the rotation range of the fin. [Effects of the Invention]

[0008] According to the present invention, the airflow performance of the fins can be improved. [Brief explanation of the drawing]

[0009] [Figure 1] This is a central end view showing a wind direction adjustment device according to the first embodiment of the present invention. [Figure 2] (a) is a perspective view showing a part of the wind direction adjustment device, and (b) is a plan view showing a part of the wind direction adjustment device. [Figure 3] This is a front view showing the inclined portion of the case body of the airflow direction adjustment device as seen from the upstream side of the air passage. [Figure 4] This is a perspective view of the wind direction adjustment device shown above. [Figure 5] The image shows a part of the wind direction adjustment device according to a second embodiment of the present invention, where (a) is a front view showing an enlarged part of (b), and (b) is a front view showing the inclined portion of the case body of the wind direction adjustment device from the upstream side of the ventilation passage. [Figure 6]This is a front view showing a portion of the inclined section of the case body of the wind direction adjustment device according to the third embodiment of the present invention, enlarged from the upstream side of the ventilation passage. [Figure 7] This is a front view showing a portion of the inclined section of the case body of the wind direction adjustment device according to the third embodiment of the present invention, enlarged from the upstream side of the ventilation passage. [Modes for carrying out the invention]

[0010] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

[0011] In Figure 4, 1 is an airflow adjustment device. The airflow adjustment device 1 is also called an air outlet, ventilator, register, etc., and adjusts the direction of airflow from an air conditioning system, etc. To clarify the explanation below, the airflow adjustment device 1 is defined as having a front side, front side, or near side on the leeward side from which the air is blown out, and a rear side, back side, or far side on the opposite side, i.e., the windward side from which the air is received. The directions are defined as the left-right direction or width direction and the up-down direction when viewed from the front. In this embodiment, the airflow adjustment device 1 is applied to an air conditioning system for a vehicle such as an automobile. The airflow adjustment device 1 may be placed in any position, but in the drawing, it is assumed that the arrow FR side is the front side, the arrow RR side is the rear side, the arrow L side is the left side, the arrow R side is the right side, the arrow U side is the top side, and the arrow D side is the bottom side. These directions are illustrated as examples only and may be changed as appropriate depending on the installation position and orientation of the airflow adjustment device 1.

[0012] The airflow adjustment device 1 comprises a case body 3. The case body 3 is formed in a cylindrical shape with side walls 4. In this embodiment, the side walls 4 are formed in a cylindrical shape in the front-rear direction. In the illustrated example, the side walls 4 are formed in a rectangular cylindrical shape. The ventilation passage 5 is enclosed inside by the side walls 4. The direction parallel to the central axis of the side walls 4 is the ventilation direction of the ventilation passage 5. In this embodiment, the ventilation direction of the ventilation passage 5 is in the front-rear direction, and air is ventilated from rear to front. That is, in the ventilation passage 5, the rear side is the upstream side in the ventilation direction, and the front side is the downstream side in the ventilation direction.

[0013] The side wall 4 has a predetermined length in the ventilation direction of the ventilation passage 5. In this embodiment, the side wall 4 is flattened in the vertical direction and elongated in the horizontal direction, i.e., horizontally elongated. Therefore, the air direction adjustment device 1 is formed in a horizontal, thin shape. The side wall 4 integrally has a pair of side wall sections 6 that face each other across the central part of the ventilation passage 5, i.e., the central axis of the side wall 4 or the case body 3, and a pair of end wall sections 7 that connect these pairs of side wall sections 6. The pair of side wall sections 6 face each other in the horizontal direction, and the pair of end wall sections 7 face each other in the vertical direction. The rear end, which is one end of the pair of side wall sections 6,6 and the pair of end wall sections 7,7, surrounds the inlet 8 that receives air into the ventilation passage 5, and the front end, which is the other end of the pair of side wall sections 6,6 and the pair of end wall sections 7,7, surrounds the outlet 9 that blows air out of the ventilation passage 5. In other words, the rear end of the case body 3 is an inlet 8 that receives air into the ventilation passage 5, and the front end of the case body 3 is an outlet 9 that blows air out of the ventilation passage 5. The ventilation passage 5 is formed between the inlet 8 and the outlet 9, connecting them. The outlet 9 has a horizontally elongated shape, being narrow vertically and wide horizontally. The upper and lower opening edges of the outlet 9 may be inclined to widen towards the downstream side.

[0014] The side wall portions 6, 6 have an enlarged portion 10 at the front end portion that demarcates the air outlet 9, that is, at the downstream end of the ventilation passage 5. The enlarged portion 10 is formed such that at least the inner surface that demarcates the ventilation passage 5 is gradually inclined toward the downstream side and toward the wind axis side, that is, toward the central axis side of the case body 3, and the cross-sectional area gradually increases toward the left and right toward the air outlet 9. In other words, the enlarged portion 10 is formed in an expanding shape toward the air outlet 9. The enlarged portion 10 is not an essential component.

[0015] As shown in Figures 1 and 4, the end wall portions 7, 7 have an inclined portion 11 at the front end connected to the outlet 9, that is, at the downstream end of the ventilation passage 5. The inclined portion 11 is a tapered portion formed such that at least the inner surface that partitions the ventilation passage 5 is gradually inclined toward the downstream side towards the air axis side, that is, toward the central axis side of the case body 3, and the cross-sectional area gradually narrows vertically toward the outlet 9.

[0016] Also, the end walls 7, 7 are connected to the upstream end of the inclined portion 11 and have a cylindrical portion 12 which is a general portion. The cylindrical portion 12 is located along the front-rear direction in which the end walls 7, 7 are in the ventilation direction with respect to each other and are parallel or substantially parallel, and is formed in a cylindrical shape having a constant or substantially constant cross-sectional area. Therefore, the ventilation passage 5 is formed such that the cross-sectional area gradually decreases from the cylindrical portion 12 through the inclined portion 11 to the air outlet 9.

[0017] In the present embodiment, further, the end walls 7, 7 are connected to the upstream end of the cylindrical portion 12 and have an upstream inclined portion 13. At least the inner surface partitioning the ventilation passage 5 of the upstream inclined portion 13 gradually inclines in a direction away from the wind axis side toward the downstream side. That is, the upstream inclined portion 13 has an inclination direction opposite to that of the inclined portion 11, and is an enlarged portion formed such that the cross-sectional area gradually widens vertically toward the cylindrical portion 12.

[0018] Also, in the illustrated example, the end walls 7, 7 have an upstream cylindrical portion 14 at the rear end connected to the inlet 8, that is, at the position of the upstream end of the ventilation passage 5. The upstream cylindrical portion 14 is connected to the upstream end of the upstream inclined portion 13. The upstream cylindrical portion 14 is located along the front-rear direction in which the end walls 7, 7 are in the ventilation direction with respect to each other and are parallel or substantially parallel, and is formed in a cylindrical shape having a constant or substantially constant cross-sectional area.

[0019] Therefore, in the present embodiment, in the case body 3, the upstream cylindrical portion 14, the upstream inclined portion 13, the cylindrical portion 12, and the inclined portion 11 are arranged in this order from the inlet 8 which is the upstream end to the air outlet 9 which is the downstream end. Note that the upstream cylindrical portion 14 and the upstream inclined portion 13 are not essential components.

[0020] Also, inside the case body 3, a ventilation path branching portion 15 for branching the ventilation path 5 is arranged. The ventilation path branching portion 15 is arranged coaxially with the case body 3, and branches the ventilation path 5 into, for example, two air passage portions 5a and 5b in the vertical direction. For example, the ventilation path branching portion 15 is located inside the cylindrical portion 12, and branches the ventilation path 5 vertically in a portion extending from the position of the upstream inclined portion 13 to the cylindrical portion 12.

[0021] The case body 3 may be integrally formed or may be formed by combining a plurality of members. In the present embodiment, the case body 3 includes a case body main body portion 17 and a finisher 18 which is a design portion attached to the front end portion of the case body main body portion 17. The air inlet 8, the upstream cylindrical portion 14, the upstream inclined portion 13, and the cylindrical portion 12 are formed in the case body main body portion 17, and the enlarged portion 10, the inclined portion 11, and the air outlet 9 are formed in the finisher 18.

[0022] As shown in FIG. 1, in the case body 3, an upstream fin 20 and a downstream fin 21 which is also a fin are arranged at positions in the ventilation path 5. The fins 20 and 21 are also called louvers. The fins 20 and 21 adjust the wind direction of the air-conditioning air blown out from the air outlet 9 by rotating as it passes through the ventilation path 5.

[0023] The upstream fin 20 is also called a rear fin, etc. The upstream fin 20 is formed in a plate shape, has a rotation axis A1 along the left-right direction, is arranged with the plate thickness direction as the up-down direction, and is a lateral fin that can rotate in the up-down direction intersecting or perpendicular to the front-rear direction, which is the ventilation direction. That is, each main surface of the upstream fin 20 is a flow straightening surface or guide surface that guides the air. The upstream fin 20 has a rotating part on the rotation axis A1 that is rotatably supported by a rotating receiving part on the case body 3 side. The rotating part and the rotating receiving part are formed, for example, with one being a shaft part and the other being a hole or recess. Rotating parts are located on both the left and right sides of the upstream fin 20, and both of these rotating parts may be shaft parts, holes or recesses, or one rotating part may be a shaft part and the other rotating part may be a hole or recess. The rotating receiving part may be formed on the side wall 6 of the case body 3, or on a receiving member such as a spacer attached to the case body 3.

[0024] The upstream fin 20 works in cooperation with the inclination of the inclined section 11 to adjust the vertical direction of the airflow that passes through the air passage 5 and is blown out from the outlet 9. In this embodiment, only one upstream fin 20 is provided, but it is not limited to this, and multiple fins may be provided. The downstream end of the upstream fin 20 is close to the air passage branch section 15, and at this downstream end position, it has a pivot axis A1 (rotating section) in the vertical center. The upstream side of the upstream fin 20 extends into the upstream cylindrical section 14. The rotation of the upstream fin 20 controls the distribution balance of the air received from the inlet 8 into the air passage 5 to the air passage sections 5a and 5b, and at the position where the upstream fin 20 is rotated to its maximum extent (shown by a dashed line in Figure 1), the inlet 8 selectively communicates with either the air passage section 5a or the air passage section 5b.

[0025] The rotation angle of the upstream fin 20 is controlled by the upstream control unit 23 shown in Figure 4. The upstream control unit 23 may be electrically operated or manually operated. In this embodiment, the upstream control unit 23 has a motor 23a, such as a stepping motor, which is a drive unit, and the motor 23a is connected to the rotating part of the upstream fin 20 shown in Figure 1 to rotate the upstream fin 20.

[0026] The downstream fin 21 is also called a front fin, etc. The downstream fin 21 is formed in a plate shape and is located downstream of the upstream fin 20 in the ventilation direction, i.e., in front of it. It has a rotation axis A2 in a predetermined direction that intersects or is perpendicular to the rotation axis A1 of the upstream fin 20, in this embodiment it is in the vertical direction, and is a vertical fin that can rotate in the left and right directions that intersect or are perpendicular to the front-to-back direction, which is the ventilation direction, and the up-to-down direction, which is the airflow direction by the upstream fin 20, with the plate thickness direction being the left-to-right direction. In other words, each main surface of the downstream fin 21 is a flow-straightening surface or guide surface that guides the air. The downstream fin 21 has a rotating part 26 on the rotation axis A2 that is rotatably supported by a rotating receiving part 25 on the case body 3 side. The rotating part 26 and the rotating receiving part 25 are formed, for example, one being a shaft part and the other being a hole part or recess part. In this embodiment the rotating part 26 is a shaft part and the rotating receiving part 25 is a hole part. The rotating portion 26 is located above and below the downstream fin 21. However, it is not limited to this configuration; the rotating portion 26 may be a hole or recess, and the rotating receiving portion 25 may be a shaft, or one rotating portion 26 may be a shaft and the other rotating portion 26 may be a hole or recess. In the illustrated example, the rotating receiving portion 25 is formed on a receiving member 27 such as a spacer attached to the case body 3, but it is not limited to this configuration; it may also be formed on the end wall portion 7 of the case body 3.

[0027] The downstream fins 21 adjust the left-right direction of the airflow that passes through the ventilation passage 5 and is blown out from the outlet 9. In this embodiment, there are multiple downstream fins 21, for example five, but the number is not limited to this, and any number can be set according to the width of the outlet 9. The downstream fins 21 have their upstream end located inside the cylindrical part 12 and their downstream end located inside the inclined part 11 facing the outlet 9, and the cylindrical part 12 has a pivot axis A2 (rotating part 26) at a position between these upstream and downstream ends. The rotation of the downstream fins 21 controls the left-right direction of the airflow from the outlet 9. In this embodiment, the downstream fin 21 has a straightening section 21a located in the air passage section 5a and a straightening section 21b located in the air passage section 5b. By controlling the left-right direction of the air distributed to the air passage sections 5a and 5b by the upstream fin 20 using the straightening sections 21a and 21b, the left-right direction of the air coming out of the outlet 9 where they merge is controlled.

[0028] The downstream fin 21 has inclined surfaces 30 formed vertically that are inclined in line with the inclination of the inclined section 11. The inclined surfaces 30 are inclined toward the front, which is the downstream side, toward the central part in the vertical direction, which is the wind axis side of the air passage 5. The inclined surfaces 30 are located from a position in front of the rotation axis A2 (rotating section 26) to the front end, which is the downstream end of the downstream fin 21. The inclination angle of the inclined surfaces 30 is set so that it is approximately equal to the inclination of the inclined section 11 when the downstream fin 21 is in the neutral position, that is, when it is not rotating in the left-right direction. Therefore, when the downstream fin 21 rotates from the neutral position in the left-right direction, the inclination direction of the inclined section 11 and the inclination direction of the inclined surfaces 30 no longer coincide.

[0029] Therefore, in this embodiment, as shown in Figures 1, 2(a), 2(b), and 3, a constant gap portion 32 is formed on the inclined portion 11, which has a shape that keeps the gap with the inclined surface 30 substantially constant throughout the entire rotation range of the downstream fin 21. The constant gap portion 32 is formed on the back side of the inclined portion 11, that is, on the inner surface side that divides the ventilation passage 5 and faces the inclined surface 30, corresponding to the downstream fin 21. For example, the constant gap portion 32 is formed as an arc-shaped counterbore that is recessed along the trajectory of the inclined portion 11 in the rotation range of the downstream fin 21. That is, the constant gap portion 32 in this embodiment is formed in the shape of a truncated cone with the rotation axis A2 as its central axis. The constant gap portion 32 has a shape in which the central part in the left-right direction corresponding to the neutral position of the downstream fin 21 is located at the front, and from that position it gradually curves towards the rear in the left-right direction. In this embodiment, since a constant gap portion 32 is formed corresponding to each of the multiple downstream fins 21, the multiple constant gap portions 32 are connected in the left-right direction to form a wavy surface on the inclined portion 11.

[0030] The rotation angle of the downstream fin 21 is controlled by the downstream control unit 35 shown in Figure 4. The downstream control unit 35 may be electrically operated or manually operated. In this embodiment, the downstream control unit 35 has a motor 35a, such as a stepping motor, which is a drive unit, and the motor 35a is connected to the rotation part 26 of one of the downstream fins 21 shown in Figure 1 to rotate the downstream fin 21. In this embodiment, multiple downstream fins 21 are connected by a link 36, and in conjunction with the rotation of one of the downstream fins 21 rotated by the downstream control unit 35, the remaining downstream fins 21 rotate in the same direction while maintaining substantially parallelism. In the illustrated example, the link 36 is axially connected to the connecting part 21c between the rectifier parts 21a and 21b and is housed within the ventilation branch part 15. Furthermore, the position of the link 36 is covered from the front by a cover 38 attached between the rectifier parts 21a and 21b, so that it cannot be seen from the outlet 9 side. As shown in Figure 4, the cover 38 has a rectangular shape that is elongated in the left-right direction along the opening shape of the air outlet 9, and is arranged across multiple downstream fins 21.

[0031] The airflow adjustment device 1 is positioned with its inlet 8 connected to the air conditioning unit. The conditioned air from the air conditioning unit passes through the inlet 8 and the ventilation passage 5, is distributed by the upstream fin 20 and the downstream fin 21, and is blown out from the outlet 9.

[0032] The wind direction adjustment device 1 of this embodiment allows for the blowing of conditioned air in any direction by combining vertical air distribution by the upstream fin 20 and inclined section 11 and horizontal air distribution by the downstream fin 21.

[0033] First, regarding the vertical airflow distribution, when the upstream fin 20 is in the neutral position (shown by the solid line in Figure 1), the conditioned air introduced into the ventilation passage 5 from the inlet 8 is guided by the horizontal upstream fin 20 and distributed evenly or nearly evenly to the air passages 5a and 5b. After passing through the air passages 5a and 5b, it is blown out from the outlet 9 along the slope of the upper and lower inclined sections 11, canceling out the directional differences and causing the air to blow straight forward from the outlet 9. Furthermore, when the upstream control unit 23 rotates the upstream fin 20 vertically around the rotation axis A1, the balance of air distribution to the air passages 5a and 5b changes, causing the directional component on the side with the relatively larger distribution balance to become stronger, resulting in vertical directionality in the conditioned air blown out from the outlet 9.

[0034] Furthermore, regarding the lateral airflow distribution, the downstream control unit 35 rotates the downstream fin 21 in the left-right direction around the rotation axis A2. As a result, the conditioned air that has passed through the air passages 5a and 5b is straightened by the downstream fin 21, and the direction in which it is blown out from the outlet 9 is controlled according to the rotation angle of the downstream fin 21.

[0035] In this embodiment, by providing a constant gap portion 32 in the inclined portion 11, even when the downstream fin 21 is rotated arbitrarily in the left-right direction, the gap between the front end of the inclined surface 30, which is the tip of the downstream fin 21 on the outlet 9 side, and the edge of the inclined portion 11 on the outlet 9 side can be kept at a substantially constant minimum gap. As a result, conditioned air is less likely to leak out of the gap in any direction, and the diffusion of conditioned air in the inclined portion 11 due to this leakage can be suppressed, thereby improving the left-right air distribution performance of the downstream fin 21.

[0036] Furthermore, by forming the constant gap portion 32 in an arc shape that is recessed along the trajectory of the inclined surface 30 within the rotation range of the downstream fin 21, the gap between the front end of the inclined surface 30, which is the tip of the downstream fin 21 on the outlet 9 side, and the end edge of the inclined portion 11 on the outlet 9 side can be reliably maintained at a substantially constant minimum gap, regardless of the position the downstream fin 21 is rotated to within its rotation range.

[0037] Next, a second embodiment will be described with reference to Figure 5. Note that components and operations similar to those in the first embodiment are denoted by the same reference numerals and their descriptions are omitted.

[0038] As shown in Figures 5(a) and 5(b), in this embodiment, a plurality of dimples 40 are formed in the constant gap portion 32. The dimples 40 are recessed relative to the reference surface of the constant gap portion 32. Numerous dimples 40 are formed in each constant gap portion 32. The arrangement of these dimples 40 can be set arbitrarily, but for example, they are arranged at equal or approximately equal intervals so as to be evenly or approximately evenly distributed in the constant gap portion 32. In the illustrated example, the dimples 40 are arranged in multiple rows on the left and right sides of each constant gap portion 32, and the dimples 40 in adjacent rows on the left and right are offset in the front-to-back direction. In this embodiment, the dimples 40 are formed in a spherical shape recessed relative to the reference surface of the constant gap portion 32, and the opening of the reference surface is circular. In the illustrated example, each dimple 40 is formed to be the same or approximately the same shape.

[0039] In this way, by forming dimples 40 on the inclined portion 11, the dimples 40 can suppress turbulence caused by vortices in the air conditioning air hitting the inclined portion 11, thereby further improving the lateral air distribution performance of the downstream fins 21.

[0040] Furthermore, the opening shape of the dimple 40 on the reference surface of the constant gap section 32 is not limited to a circular shape, but can be any shape. For example, it may be formed as a quadrilateral shape with sides in the front-rear and left-right directions, as in the third embodiment shown in Figure 6, or as a hexagonal shape, as in the fourth embodiment shown in Figure 7. Also, each dimple 40 does not need to be the same or substantially the same shape. Even in these cases, the dimple 40 can suppress turbulence caused by vortices in the air conditioning air hitting the inclined section 11, thereby improving the left-right air distribution performance by the downstream fin 21 and achieving the same effects as in the second embodiment.

[0041] Furthermore, in each of the above embodiments, the constant gap portion 32 is not limited to a truncated conical surface, but may be formed in any shape such that the gap with the inclined surface 30 is substantially constant within the rotational range of the downstream fin 21.

[0042] Furthermore, although the wind direction adjustment device 1 is shown as horizontal, it may also be a vertical type with the shape and arrangement of the above-mentioned parts rotated 90° around the front-to-back axis.

[0043] Furthermore, although an example was given in which the upstream control unit 23 and the downstream control unit 35 are configured separately, they may also be configured integrally so that the forward and reverse rotation of a single drive unit performs the roles of both the upstream control unit 23 and the downstream control unit 35.

[0044] Furthermore, the wind direction adjustment device 1 is not limited to automobiles, but may be used for any other purpose. [Industrial applicability]

[0045] The present invention can be suitably used, for example, as an airflow direction adjustment device for the air conditioning system of an automobile. [Explanation of symbols]

[0046] 1 Wind direction adjustment device 3 Case Body 5. Ventilation channel 9 Air outlet 11 Slope 21 fins, downstream fins 30 Slope 32 Fixed gap 40 dimples A2 Rotation axis

Claims

1. A case body having an internally partitioned ventilation passage and an outlet for blowing out the air that has passed through the ventilation passage, The fins are rotatably positioned in the ventilation passage facing the outlet, having a pivot axis in a predetermined direction intersecting the ventilation direction of the ventilation passage, The case body has inclined portions on its inner surfaces facing the predetermined direction, which are inclined toward the air outlet in a direction intersecting the ventilation direction and the predetermined direction. The fin has an inclined surface that is inclined along the inclined portion at a position opposite to each of the inclined portions, The inclined portion includes a gap-constant portion formed in such a shape that the gap with the inclined surface remains substantially constant within the rotational range of the fin. A wind direction adjustment device characterized by the following features.

2. The constant gap section is formed in an arc shape that is recessed along the trajectory of the inclined surface within the rotation range of the fin. The wind direction adjustment device according to claim 1, characterized in that it is a wind direction adjustment device.

3. The gap-fixed section has multiple dimples. The wind direction adjustment device according to claim 1 or 2, characterized in that it is a wind direction adjustment device.

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