Air blowing device

Abstract

To provide an air blower which can lengthen an arrival distance of an air flow blown out of a main flow channel, even when obliquely blowing out the air flow.SOLUTION: A flow channel formation part 2 has an upstream side flow channel 21 in which air flows, and a downstream side flow channel 22 communicating with the downstream side of the upstream side flow channel 21. An air flow adjustment part 3 has a plurality of fins 32 for adjusting a direction of an air flow blown out of the downstream side flow channel 22, and a sub-flow channel formation part 33 for forming a plurality of sub-flow channels 35 on the inner wall side of the downstream side flow channel 22 out of the plurality of fins 32. The flow channel formation part 2 is configured so that the outer width of the air flow adjustment part 3 is larger than the inner width of a part having a minimum flow channel width out of the upstream side flow channel 21. An air blower 1 is configured so that inlet openings 36 of the sub-flow channels 35 are seen at an inner side of the upstream side flow channel 21, when the air flow adjustment part 3 is seen from the upstream side flow channel 21 as a maximum rotation state where the rotation angle of the air flow adjustment part 3 becomes maximum.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an air blowing device.

Background Art

[0002] Conventionally, an air blowing device used as an air outlet for blowing conditioned air into a vehicle interior from an air conditioner or the like mounted on a vehicle is known.

[0003] The air blowing device described in Patent Document 1 has a configuration in which an air flow adjusting unit that changes the direction of the air flow blown into the vehicle interior is accommodated inside a flow path forming unit that forms a flow path through which air flows. In Patent Document 1, the flow path forming unit is referred to as a base unit, and the air flow adjusting unit is referred to as a grill unit. In the air flow adjusting unit, a main flow path is formed in the central portion, and a plurality of sub-flow paths are formed so as to surround the outside of the main flow path. Thereby, this air blowing device suppresses the drawing action in which air outside the main flow is drawn into the main flow blown out from the main flow path by the assisting air flow blown out from the sub-flow paths, thereby increasing the reach distance of the main flow.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, Patent Document 1 describes a configuration in which the rotation angle of the airflow adjustment unit with respect to the flow path centerline of the flow path forming unit is relatively small, and does not consider the case where the rotation angle of the airflow adjustment unit is large. For example, in a configuration in which the rotation angle of the airflow adjustment unit is larger than that shown in Patent Document 1, when the airflow adjustment unit is viewed from the upstream side of the flow path of the flow path forming unit, the entire inlet opening of the sub-flow path is located outside the inner wall of the upstream flow path, and the entire inlet opening of the sub-flow path becomes invisible. In that case, the amount of air flowing into the sub-flow path decreases, and the supporting airflow blown out from the sub-flow path also decreases, so the effect of lengthening the reach of the main flow path is not obtained, and the reach of the main flow path becomes shorter.

[0006] In view of the above, the present invention aims to provide an air blowing device that can increase the reach of the airflow blown out from the main flow path, even when the airflow is blown out at an angle. [Means for solving the problem]

[0007] To achieve the above objective, the invention according to claim 1 comprises an air blowing device, a flow path forming unit and an airflow adjustment unit. The flow path forming unit has an upstream flow path through which air flows, and a downstream flow path communicating with the downstream side of the upstream flow path. The airflow adjustment unit has a plurality of fins that adjust the direction of the airflow blown out from the downstream flow path, and a sub-flow path forming unit that forms a sub-flow path on the inner wall side of the downstream flow path among the fins, and is provided so as to be rotatable about a predetermined axis within the downstream flow path. Here, the outer width of the airflow adjustment unit is configured to be larger than the inner width of the portion of the upstream flow path where the flow path width is smallest. The airflow adjustment unit is displaceable between a standard state in which air is blown out along the center line of the flow path forming unit and a rotated state in which air is blown out at an angle to the center line of the flow path by rotating at a predetermined angle around the axis from the standard state. When the air blowing device is in the maximum rotation state in which the rotation angle of the airflow adjustment unit is at its maximum, and the airflow adjustment unit is viewed from the upstream flow path parallel to the center line of the flow path, at both ends of the fin The configuration is such that the inlet opening of the secondary channel is visible inside the inner wall of the upstream channel. Furthermore, the secondary channel forming section forms the secondary channel in at least one of the multiple fins. Furthermore, in the state where the fins are parallel to the flow channel centerline, the fins on which the sub-flow channel forming section is provided have an inclined section that slopes toward the flow channel centerline in the standard state, moving upstream from the sub-flow channel forming section. When the airflow adjustment section is viewed parallel to the flow channel centerline from the upstream flow channel, the inclined section does not obscure the inlet openings of the sub-flow channels at both ends of the fins, from the standard state to the maximum rotation state, and the inlet openings of the sub-flow channels are visible inside the inner wall of the upstream flow channel.

[0008] According to this, when viewing the airflow adjustment unit from the upstream flow path parallel to the flow path centerline, the air blowing device is configured such that the inlet opening of the secondary flow path is visible (in other words, exposed) even when the airflow adjustment unit is at its maximum rotational state. Therefore, even when the airflow adjustment unit is at its maximum rotational state, a decrease in the amount of air flowing from the upstream flow path to the secondary flow path is prevented, and the amount of air flowing into the secondary flow path is ensured. Consequently, even when this air blowing device blows air at an angle to the flow path centerline of the flow path forming unit, it maintains the effect of the supporting airflow blown from the secondary flow path and suppresses the air-drawing effect on the main flow path, thereby increasing the reach of the main flow path.

[0009] The reference numerals in parentheses attached to each component indicate an example of the correspondence between that component and the specific components described in the embodiments described later. [Brief explanation of the drawing]

[0010] [Figure 1] This is a cross-sectional view showing the maximum downward rotation state of the airflow adjustment unit in the air blowing device according to the first embodiment. [Figure 2] This is a cross-sectional view along line II-II in Figure 1. [Figure 3] This is a perspective view showing a part of the airflow adjustment section of the air blowing device according to the first embodiment. [Figure 4] This is a cross-sectional view showing the standard state of the airflow adjustment section in the air blowing device according to the first embodiment. [Figure 5] This is an explanatory diagram illustrating the state of the airflow discharged from the air blowing device of the first comparative example. [Figure 6] This is an explanatory diagram illustrating the state of the airflow discharged from the air blowing device according to the first embodiment. [Figure 7] This is a cross-sectional view showing the maximum downward rotation state of the airflow adjustment section in the air blowing device of the second comparative example. [Figure 8] This is a cross-sectional view along the line VIII-VIII in Figure 7. [Figure 9]It is a sectional view showing the downward maximum rotation state of the airflow adjustment unit in the air blowing device according to the second embodiment. [Figure 10] It is a sectional view taken along the line X-X of FIG. 9. [Figure 11] It is a sectional view showing the downward maximum rotation state of the airflow adjustment unit in the air blowing device according to the third embodiment. [Figure 12] It is a sectional view taken along the line XII-XII of FIG. 11. [Figure 13] It is a perspective view showing a part of the airflow adjustment unit provided in the air blowing device according to the third embodiment. [Figure 14] It is a sectional view showing the downward maximum rotation state of the airflow adjustment unit in the air blowing device according to the fourth embodiment. [Figure 15] It is a sectional view taken along the line XV-XV of FIG. 14. [Figure 16] It is a perspective view showing a part of the airflow adjustment unit provided in the air blowing device according to the fourth embodiment.

Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other are denoted by the same reference numerals, and the description thereof will be omitted.

[0012] (First Embodiment) The first embodiment will be described with reference to the drawings. In the first embodiment, an example will be described in which the air blowing device of the present disclosure is used as an air outlet for blowing conditioned air into the vehicle interior from an air conditioner (not shown) mounted on the vehicle. The air blowing device is installed, for example, on the instrument panel of the vehicle. This air blowing device is also called a register.

[0013] As shown in FIG. 1, the air blowing device 1 includes a flow path forming portion 2 that forms a flow path through which air flows, and an air flow adjusting portion 3 provided inside the flow path forming portion 2. The air flow adjusting portion 3 is also called a barrel portion. In each figure, the vertical direction in the state where the air blowing device 1 is mounted on a vehicle is indicated by arrows marked with "up" and "down".

[0014] The flow path forming portion 2 is a cylindrical member that constitutes the outer shell of the air blowing device 1, and forms a flow path through which air flows inside it. As the shape of the flow path forming portion 2, various shapes such as a rectangular tube shape or a cylindrical shape can be adopted, for example. The flow path forming portion 2 has an upstream side flow path 21 into which air-conditioning air flows from an air-conditioning device (not shown) and a downstream side flow path 22 that communicates with the downstream side of the upstream side flow path 21. The upstream side flow path 21 and the downstream side flow path 22 are continuously formed integrally.

[0015] In the first embodiment, the inner width D1 of the upstream side flow path 21 is substantially constant. The downstream side flow path 22 has a widened portion 23 whose inner width gradually increases from the upstream side to the downstream side, and an outlet portion 24 provided downstream of the widened portion 23.

[0016] The air flow adjusting portion 3 is provided rotatably around a predetermined axis Ax inside the downstream side flow path 22. As shown in FIGS. 1 to 3, the air flow adjusting portion 3 has an inner cylinder 31, fins 32, a sub-flow path forming portion 33, and the like.

[0017] The inner cylinder 31 is a member that constitutes the outer frame of the air flow adjusting portion 3. The outer width D2 of the inner cylinder 31 (that is, the outer width D2 of the air flow adjusting portion 3) is formed larger than the inner width D1 of the upstream side flow path 21. And the air flow adjusting portion 3 is rotatable around a predetermined axis Ax inside the downstream side flow path 22.

[0018] Figure 4 shows the standard state in which the airflow adjustment unit 3 blows airflow along the flow path centerline CL of the flow path forming unit 2. On the other hand, Figure 1 shows the maximum rotation state in which the rotation angle is maximum downwards, among the rotation states in which the airflow adjustment unit 3 rotates by a predetermined angle around the axis Ax from the standard state and blows airflow at an angle to the flow path centerline CL. The airflow adjustment unit 3 is configured so that the inner cylinder 31, fins 32, and sub-flow path forming unit 33 rotate as a single unit from the standard state to the maximum rotation state.

[0019] The fins 32 are plate-shaped members used to adjust the direction of the airflow blown into the vehicle interior from the downstream flow path 22 of the air blowing device 1. Multiple fins 32 are arranged in the depth direction of the paper in Figure 1 (i.e., the vehicle width direction). Each of the multiple fins 32 is configured to change angle in the vehicle width direction. In addition, as the angle of the multiple fins 32 changes in the vehicle width direction, the multiple sub-flow path forming sections 33, which are integrally formed with the multiple fins 32, also change angle in the vehicle width direction.

[0020] When the fins 32 are parallel to the flow channel centerline CL, the surface of the fins 32 that faces perpendicular to the axis Ax is provided with an inclined portion 34 that slopes upstream toward the flow channel centerline CL from the middle of the sub-flow channel forming portion 33 in the reference state shown in Figure 4. The reason for providing the inclined portion 34 on the surface of the fins 32 that faces perpendicular to the axis Ax will be explained later.

[0021] The sub-channel forming section 33 is provided on the inner wall side of the downstream channel 22 of the fin 32. The sub-channel forming section 33 forms a sub-channel 35 through which air flows on the inner wall side of the downstream channel 22. The sub-channel forming section 33 is provided on multiple fins 32. Therefore, the air blown out from each of the multiple sub-channels 35 formed by the multiple sub-channel forming sections 33 (hereinafter referred to as "supporting airflow") flows so as to surround the main flow that is blown into the vehicle interior from the downstream channel 22 of the air blowing device 1.

[0022] To explain the effect of the assisting airflow blown out from the auxiliary channel 35, we will first describe the first comparative example air blowing device 101, which does not have the auxiliary channel 35.

[0023] Figure 5 shows the state of the airflow discharged from the air blowing device 101 of the first comparative example. The air blowing device 101 of the first comparative example has the same configuration as the air blowing device 1 of the first embodiment described above, except that it does not have a sub-channel forming section 33 and a sub-channel 35.

[0024] As shown in Figure 5, in the air blowing device 101 of the first comparative example, when airflow (hereinafter referred to as "main stream") is blown into the vehicle interior from the downstream flow path 22, countless transverse vortices Vt are generated due to the velocity difference between the blown-out main stream and the stationary air surrounding it. These transverse vortices Vt diffuse the main stream, and stationary air surrounding the main stream is drawn into it, shortening the reach of the main stream. Furthermore, when transverse vortices Vt combine, they develop into larger transverse vortices Vt, further shortening the reach of the main stream. In addition, when stationary air surrounding the main stream is drawn into it, the temperature or humidity of the main stream changes. Therefore, it becomes difficult for airflow adjusted to the appropriate temperature or humidity to reach the desired space.

[0025] In contrast, the air blowing device 1 of this embodiment provides the following effects through the assisting airflow blown from the sub-channel 35. Specifically, as shown in Figure 6, in the air blowing device 1 of this embodiment, the assisting airflow blown from the sub-channel 35 flows outside the main flow that is blown into the vehicle interior from the downstream channel 22. As a result, the transverse vortex Vt formed in the main flow is disturbed by the assisting airflow, and the development of the transverse vortex Vt is suppressed. This suppresses the diffusion of the main flow and the drawing of stationary air around the main flow into the main flow, thereby increasing the reach of the main flow. Furthermore, when the development of the transverse vortex Vt is suppressed, stationary air around the main flow is less likely to be drawn into the main flow, making it easier for airflow adjusted to the appropriate temperature or humidity to reach the desired space.

[0026] By the way, even if the air blowing device 1 has a sub-flow channel 35, if the airflow adjustment unit 3 is in its maximum rotation state and the airflow adjustment unit 3 is viewed from the upstream flow channel 21, and the inlet opening 36 of the sub-flow channel 35 is not visible, it is conceivable that the amount of air flowing into the sub-flow channel 35 will decrease.

[0027] Figures 7 and 8 show the air blowing device 102 of the second comparative example for comparison with the first embodiment. In Figure 7, the position of the inclined portion 34 described in the first embodiment is indicated by a dashed line within the fins 32 of the air blowing device 102 of the second comparative example.

[0028] As shown in Figures 7 and 8, in the air blowing device 102 of the second comparative example, the surface 331 on the flow path centerline CL side of the inner wall of the sub-flow path forming section 33 is located closer to the inner cylinder 31 than the inclined section 34 described in the first embodiment. Therefore, as shown in Figure 8, when the airflow adjustment section 3 is in its maximum rotation state and viewed from the upstream flow path 21, the inlet opening 36 of the sub-flow path 35 is hidden from view by the flow path forming section 2. In this state, the amount of air flowing into the sub-flow path 35 decreases, and the supporting airflow blown out from the sub-flow path 35 also decreases, so the effect of lengthening the reach of the main flow path is not obtained, and problems arise such as the reach of the main flow path becoming shorter.

[0029] In contrast to the air blowing device 102 of the second comparative example, the air blowing device 1 of the first embodiment has the following configuration and thus provides advantageous effects.

[0030] In the first embodiment, when the airflow adjustment unit 3 is in its maximum rotation state, and the airflow adjustment unit 3 is viewed from the upstream flow path 21 parallel to the flow path centerline CL, the inlet opening 36 of the sub-flow path 35 is visible inside the inner wall of the upstream flow path 21. Therefore, even when the airflow adjustment unit 3 is in its maximum rotation state, a decrease in the amount of air flowing from the upstream flow path 21 to the sub-flow path 35 is prevented, and the amount of air flowing into the sub-flow path 35 is ensured. Consequently, even when the airflow is blown out at an angle to the flow path centerline CL of the flow path forming unit 2, the air blowing device 1 of the first embodiment maintains the effect of the supporting airflow blown out from the sub-flow path 35 and suppresses the air-drawing effect on the main flow, thereby increasing the reach of the main flow.

[0031] Furthermore, as shown in Figures 1 to 4, in the first embodiment, an inclined portion 34 is provided on the surface of the fin 32 on which the sub-channel forming portion 33 is provided, which faces perpendicular to the axis Ax, and is inclined toward the channel centerline CL toward the upstream side from the sub-channel forming portion 33. The inclined portion 34 is located in the channel center of the sub-channel forming portion 33. line CL The side inner wall is shaved away, and the sub-flow channel forming section 33 is inclined towards the upstream side and toward the flow channel centerline CL from the middle of the section. Therefore, in this embodiment, when the airflow adjustment section 3 is viewed from the upstream flow channel 21 parallel to the flow channel centerline CL, the airflow adjustment section 3 is configured such that the inclined section 34 does not hide the inlet opening 36 of the sub-flow channel 35, and the inlet opening 36 of the sub-flow channel 35 is visible inside the inner wall of the upstream flow channel 21, from the standard state to the maximum rotation state.

[0032] Incidentally, as indicated by the symbol T in Figure 16, which will be referenced in the fourth embodiment described later, it is also possible to form the inclined portion 34 within the range of the thickness of the portion 332 on the fin 32 side of the subflow channel forming portion 33. That is, in the first embodiment, as shown in Figure 3, the inclined portion 34 is formed within the range of the thickness of the portion 332 on the fin 32 side, so the pressure loss of the airflow passing through the airflow adjustment portion 3 does not worsen.

[0033] Furthermore, even if the fin 32 is made longer upstream of the sub-channel forming section 33, when the airflow adjustment section 3 is viewed from the upstream channel 21 parallel to the channel centerline CL, the inclined section 34 does not obscure the inlet opening 36 of the sub-channel 35, and the configuration allows the inlet opening 36 of the sub-channel 35 to be seen as being wider toward the channel centerline CL.

[0034] Furthermore, the air blowing device 1 of this embodiment allows for a larger rotation angle of the airflow adjustment unit 3 compared to the air blowing device 1 described in Patent Document 1. When the airflow adjustment unit 3 is viewed from the upstream flow path 21, even when the airflow adjustment unit 3 is in its maximum rotation state, the inclined portion 34 does not obscure the inlet opening 36 of the sub-flow path 35, and the inlet opening 36 of the sub-flow path 35 is visible, expanding towards the flow path centerline CL.

[0035] (Second Embodiment) A second embodiment will now be described. The second embodiment is a modification of the configuration of the flow path forming section 2 compared to the first embodiment, and is otherwise the same as the first embodiment. Therefore, only the parts that differ from the first embodiment will be described.

[0036] As shown in Figure 9, in the second embodiment, the upstream channel 21 of the channel forming section 2 has a constricted section 25 configured such that the channel width gradually decreases from the upstream side toward the downstream channel 22. Specifically, the inner width D1 of the section of the upstream channel 21 where the channel width is smallest is smaller than the inner width D3 of the upstream section of the upstream channel 21. The section of the upstream channel 21 where the channel width is smallest corresponds to the connection point between the constricted section 25 of the upstream channel 21 and the downstream channel 22.

[0037] In the second embodiment, as in the first embodiment, the outer width D2 of the inner cylinder 31 that constitutes the outer shell of the airflow adjustment section 3 (i.e., the outer width D2 of the airflow adjustment section 3) is formed to be larger than the inner width D1 of the portion of the upstream flow path 21 where the flow path width is smallest.

[0038] As in the second embodiment, when the upstream channel 21 has a constricted section 25, the air flowing from near the inner wall of the upstream channel 21 to the downstream channel 22 is directed toward the channel centerline CL, which raises concerns that the amount of air flowing into the subchannel 35 will decrease. However, even in that case, in the second embodiment, as shown in Figure 10, when the airflow adjustment unit 3 is viewed from the upstream flow path 21 parallel to the flow path centerline CL, the inlet opening 36 of the sub-flow path 35 is visible. Therefore, a sufficient amount of air flows into the sub-flow path 35 is ensured. Consequently, in a flow path configuration like that of the second embodiment, making the inlet opening 36 of the sub-flow path 35 visible is more effective. As a result, the air blowing device 1 of the second embodiment, like the first embodiment, maintains the effect of the supporting airflow blown out from the sub-flow path 35 and suppresses the air-drawing effect into the main flow path, thereby increasing the reach of the main flow path.

[0039] (Third embodiment) A third embodiment will now be described. The third embodiment is a modification of the configuration of the airflow adjustment unit 3 compared to the first embodiment, etc., and is otherwise the same as the first embodiment, etc. Therefore, only the parts that differ from the first embodiment, etc. will be described.

[0040] As shown in Figures 11 and 12, in the third embodiment, the connection point 39 between the sub-channel forming section 33 and the fin 32 is located downstream (i.e., towards the outlet) of the upstream end 38 of the inner cylinder 31. Furthermore, the inclined portion 34 on the surface of the fin 32 facing perpendicular to the axis Ax extends from the connection point 39 between the sub-channel forming section 33 and the fin 32 to the central upstream portion 40 of the fin. Also, as shown in Figure 13, the upstream surface 37 of the sub-channel forming section 33 is inclined downstream (i.e., towards the outlet) from the inner cylinder 31 toward the channel center axis.

[0041] As shown in Figure 12, in the third embodiment as well, when the airflow adjustment unit 3 is in its maximum rotation state, at which point its rotation angle is at its maximum, the inlet opening 36 of the sub-channel 35 is visible inside the inner wall of the upstream channel 21 when the airflow adjustment unit 3 is viewed from the upstream channel 21. Therefore, even when the airflow adjustment unit 3 is in its maximum rotation state, a decrease in the amount of air flowing from the upstream channel 21 to the sub-channel 35 is prevented, and the amount of air flowing into the sub-channel 35 is ensured. Consequently, even when the airflow is blown out at an angle to the channel centerline CL of the channel forming unit 2, the effect of the supporting airflow blown out from the sub-channel 35 is maintained, and the effect of drawing air into the main channel is suppressed, thereby increasing the reach of the main channel.

[0042] Furthermore, the third embodiment can also achieve the same effects and advantages as the first and second embodiments described above.

[0043] (Fourth Embodiment) Next, we will describe the fourth embodiment. The fourth embodiment also has a modified configuration of the airflow adjustment unit 3 compared to the first embodiment, etc., and is otherwise the same as the first embodiment, etc., so only the parts that differ from the first embodiment, etc. will be described.

[0044] As shown in Figures 14 to 16, in the fourth embodiment, the length of the sub-channel 35 is shorter than the length of the sub-channel 35 described in the first to third embodiments. Specifically, the upstream end 38 of the inner cylinder 31 is located downstream (i.e., on the outlet side) compared to the upstream end 38 of the inner cylinder 31 described in the first to third embodiments. Also, the inclined portion 34 provided on the surface of the fin 32 that faces perpendicular to the axis Ax is formed from the connection point 39 between the sub-channel forming portion 33 and the fin 32 to the central upstream portion 40 of the fin, similar to the third embodiment.

[0045] As shown in Figure 15, in the fourth embodiment as well, when the airflow adjustment unit 3 is in its maximum rotation state, with the rotation angle of the airflow adjustment unit 3 being at its maximum, the inlet opening 36 of the sub-channel 35 is visible inside the inner wall of the upstream channel 21 when viewed from the upstream channel 21. Therefore, even when the airflow adjustment unit 3 is in its maximum rotation state, a decrease in the amount of air flowing from the upstream channel 21 to the sub-channel 35 is prevented, and the amount of air flowing into the sub-channel 35 is ensured. Consequently, even when the airflow is blown out at an angle to the channel centerline CL of the channel forming unit 2, the effect of the supporting airflow blown out from the sub-channel 35 is maintained, and the effect of drawing air into the main channel is suppressed, thereby increasing the reach of the main channel.

[0046] Furthermore, as indicated by the symbol T in Figure 16, in the fourth embodiment as well, the inclined portion 34 may be formed within the thickness range of the portion 332 on the fin 32 side of the sub-flow channel forming portion 33. Even in this way, when the airflow adjustment unit 3 is viewed from the upstream flow channel 21 in the maximum rotation state where the rotation angle of the airflow adjustment unit 3 is at its maximum, the inlet opening 36 of the sub-flow channel 35 can be seen to be inside the inner wall of the upstream flow channel 21. Therefore, the fourth embodiment can also achieve the same effects as the first to third embodiments.

[0047] (Other embodiments) In the embodiments described above, the air blowing device 1 was described as being used as an outlet for blowing conditioned air into the vehicle interior from an air conditioning system, etc. However, it is not limited to this and can be used for various purposes, such as an outlet for a ventilation system or an outlet for a humidifier.

[0048] In the embodiments described above, the air blowing device 1 was described as blowing air downwards when the airflow adjustment unit 3 was in its maximum downward rotation state. However, it is not limited to this, and for example, it is also possible for the airflow adjustment unit 3 to blow air upwards when it is in its maximum upward rotation state. Furthermore, the air blowing device 1 can also blow air in a state intermediate between the maximum downward rotation state and the maximum upward rotation state.

[0049] In the embodiments described above, the axis of rotation Ax of the airflow adjustment unit 3 was described as being in the vehicle width direction (depth direction in Figure 1, etc.), but it is not limited to this and may be in a direction other than the vehicle width direction. Also, if the outer flow path 22 of the flow path forming unit 2 is cylindrical and the inner cylinder 31 of the airflow adjustment unit 3 is also cylindrical, the airflow adjustment unit 3 may be configured to rotate inside the outer flow path 22 about the flow path centerline CL.

[0050] The present invention is not limited to the embodiments described above, and can be modified as appropriate within the scope of the claims. Furthermore, the embodiments described above are not unrelated to each other, and can be combined as appropriate, except in cases where the combination is clearly impossible. In addition, it goes without saying that the elements constituting the embodiments are not necessarily essential, except in cases where they are explicitly stated to be particularly essential or where they are clearly considered essential in principle. Furthermore, in the embodiments described above, when numerical values ​​such as the number, numerical values, quantities, or ranges of the components of the embodiments are mentioned, the invention is not limited to those specific numbers, except in cases where they are explicitly stated to be particularly essential or where they are clearly limited to a specific number in principle. Furthermore, when the shapes, positional relationships, etc., of the components, etc., are mentioned in the embodiments described above, the invention is not limited to those shapes, positional relationships, etc., except in cases where they are explicitly stated to be particularly essential or where they are clearly limited to a specific shape, positional relationship, etc., in principle. [Explanation of symbols]

[0051] 1. Air blowing device 2. Flow channel forming section 3. Airflow adjustment section 22 Upstream flow path 22 Downstream flow path 32 fins 33 Sub-channel forming part 35 Subchannel 36 Inlet opening CL channel centerline

Claims

1. A flow path forming section (2) having an upstream flow path (21) through which air flows, and a downstream flow path (22) that communicates with the downstream side of the upstream flow path, An air blowing device comprising: a plurality of fins (32) for adjusting the direction of the airflow blown out from the downstream flow path; and an airflow adjustment unit (3) which has a sub-flow path forming unit (33) among the fins that forms a sub-flow path (35) on the inner wall side of the downstream flow path, and which is rotatably mounted within the downstream flow path around a predetermined axis (Ax), The outer width (D2) of the airflow adjustment section is configured to be larger than the inner width (D1) of the portion of the upstream flow path where the flow path width is smallest. The airflow adjustment unit is displaceable between a standard state in which it blows airflow along the center line (CL) of the flow path forming unit and a rotational state in which it rotates by a predetermined angle around the axis from the standard state to blow airflow diagonally with respect to the center line of the flow path. In the maximum rotation state where the rotation angle of the airflow adjustment unit is at its maximum, when the airflow adjustment unit is viewed from the upstream flow path parallel to the center line of the flow path, the inlet openings (36) of the sub-flow paths at both ends of the fins are visible inside the inner wall of the upstream flow path. The sub-channel forming section forms the sub-channel in at least one of the plurality of fins, When the fin is in a state parallel to the center line of the flow path, the surface of the fin on which the sub-flow path forming portion is provided, which faces perpendicular to the axis, is provided with an inclined portion (34) that, in the reference state, slopes toward the center line of the flow path toward the upstream side from the sub-flow path forming portion. An air blowing device in which, when the airflow adjustment section is viewed from the upstream flow path parallel to the center line of the flow path, the inclined section does not obscure the inlet openings of the sub-flow paths at both ends of the fins, from the reference state to the maximum rotation state, and the inlet openings of the sub-flow paths are visible inside the inner wall of the upstream flow path.

2. The air blowing device according to claim 1, wherein the upstream flow path has a constricted section (25) in which the flow path width gradually decreases from the upstream side toward the downstream flow path.

3. The air blowing device according to claim 1 or 2, wherein the inclined portion is inclined toward the flow channel centerline from the middle of the sub-flow channel forming portion toward the upstream side, by cutting away the inner wall of the sub-flow channel forming portion toward the flow channel centerline.

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