WO2019198573A1 - Air discharge device - Google Patents

Abstract

An air discharge device (1) equipped with a duct portion (14) forming a flow path (18) enabling the passage of an operating airstream discharged toward a discharge recipient (2), and a hole formation portion (12) forming a discharge hole (10) serving as a discharge opening for the operating airstream on the airflow downstream side of the duct portion. The hole formation portion has a swirl generation structure (20) for generating an auxiliary swirl for which the swirl characteristics, including the swirl rotation direction and the swirl axis direction, differ from a lateral swirl generated on the downstream side of the opening of the discharge hole by the operating airstream. The swirl generation structure is formed in the hole formation portion such that the auxiliary swirl collides with the lateral swirl while having a swirl characteristic, that is, the swirl rotation direction and/or the swirl axis direction, that is different from that of the lateral swirl.

Description

Air blowing device Cross-reference to related applications

This application includes Japanese Patent Application No. 2018-76325 filed on April 11, 2018, Japanese Patent Application No. 2018-135299 filed on July 18, 2018, and October 23, 2018. Based on Japanese Patent Application No. 2018-199383 filed in Japan and Japanese Patent Application No. 2018-240807 filed on Dec. 25, 2018, the contents of which are incorporated herein by reference.

The present disclosure relates to an air blowing device that blows out airflow.

Conventionally, in order to increase the reach of the airflow that becomes the working airflow, the air provided with an auxiliary air outlet that forms a support airflow that prevents the air drawn into the working airflow around the air outlet that forms the working airflow. Nozzles are known (see, for example, Patent Document 1).

JP-A-8-318176

In order to further increase the reach of the working airflow, the present inventors diligently studied the air drawing action when the working airflow was blown out from the outlet. As a result, it was found that the air drawing action is caused by a lateral vortex generated by a shearing force due to the velocity gradient of the working airflow when the working airflow is blown out from the outlet. The transverse vortex is a vortex having a vortex center perpendicular to the flow direction of the working airflow. The center of the vortex is hereinafter also referred to as the vortex axis.

As a result of further investigation by the present inventors, in the vicinity of the outlet downstream of the blower outlet, an infinite number of transverse vortices generated in the velocity boundary layer are synthesized and developed into a large-scale one, and the air drawing action becomes stronger. I got the knowledge.

However, the above-described prior art only discloses providing an auxiliary air outlet around the air outlet, and does not show any knowledge of the inventors. For this reason, it is difficult to expect further improvement in the reach of the airflow.
An object of the present disclosure is to provide an air blowing device capable of suppressing the air drawing action of the working air current blown out from the air outlet and increasing the reach of the working air current.

According to one aspect of the present disclosure, an air blowing device includes a duct portion that forms a flow path for allowing a working air flow blown toward a blowing target, and a working air flow outlet on the air flow downstream side of the duct portion. A hole forming part for forming a blowout hole. The hole forming portion has a vortex generating structure that generates an auxiliary vortex having a vortex characteristic that is different from the lateral vortex generated on the downstream side of the outlet of the blowout hole by the working airflow, including the vortex rotation direction and the vortex axis direction. The vortex generating structure is formed in the hole forming portion so that the auxiliary vortex collides with the horizontal vortex in a state where at least one of the rotation direction of the vortex and the direction of the vortex axis has a vortex characteristic different from that of the horizontal vortex.

According to another aspect of the present disclosure, the air blowing device forms a duct portion that forms a flow path for allowing the working air flow to pass therethrough, and a blowout hole that serves as an air outlet for the working air current on the downstream side of the air flow of the duct portion. And a vortex generating structure for generating auxiliary vortices having different vortex characteristics including the rotation direction of the vortex and the direction of the vortex axis from the horizontal vortex generated on the downstream side of the outlet of the blowout hole by the working airflow. The vortex generating structure includes a plurality of vortex generators arranged side by side along the peripheral edge surrounding the blowout hole in the hole forming portion, and when the airflow passes around the vortex generator, At least one of the vortex axis directions has a structure in which an auxiliary vortex different from the horizontal vortex is generated.

In the air blowing device configured as described above, when an air flow is blown out from the blowing hole, a lateral vortex is generated by the working air flow downstream of the outlet of the blowing hole. Moreover, in the said air blowing apparatus, when an airflow is blown out from the blowing hole, an auxiliary vortex will be generated by the vortex generating structure. Since the horizontal vortex and the auxiliary vortex have different vortex characteristics, when the horizontal vortex and the auxiliary vortex collide, the development of the horizontal vortex is suppressed. As a result, the drawing-in action of the air drawn into the working airflow is suppressed, and the attenuation of the flow velocity of the working airflow is reduced, so that the reach distance of the working airflow blown out from the blowout hole is increased.
Reference numerals in parentheses attached to each component and the like indicate an example of a correspondence relationship between the component and the like and specific components described in the embodiments described later.

It is a typical perspective view of the air blowing apparatus which concerns on 1st Embodiment. It is a typical front view of the air blowing apparatus which concerns on 1st Embodiment. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. It is explanatory drawing for demonstrating the velocity gradient of the airflow in the exit downstream of the 1st blower outlet used as the 1st comparative example. It is explanatory drawing for demonstrating the state of the horizontal vortex and the working airflow in the downstream of the exit of the 1st blower outlet used as the 1st comparative example. It is explanatory drawing for demonstrating the velocity gradient of the airflow in the outlet downstream of the blowing hole of the air blowing apparatus which concerns on 1st Embodiment. It is explanatory drawing for demonstrating the state of a horizontal vortex and an auxiliary vortex in the outlet downstream of the blowing hole of the air blowing apparatus which concerns on 1st Embodiment. It is a typical perspective view of the air blowing apparatus which concerns on 2nd Embodiment. It is a typical front view of the air blowing apparatus which concerns on 2nd Embodiment. It is explanatory drawing for demonstrating the potential core of the working airflow in the downstream of the exit of the 2nd blower outlet used as the 2nd comparative example. It is a typical perspective view of the air blowing apparatus which concerns on 3rd Embodiment. It is a typical front view of the air blowing apparatus which concerns on 3rd Embodiment. In the air blowing device which concerns on 3rd Embodiment, it is drawing which compared the influence which acts on the working airflow arrival rate with and without the case where there is an auxiliary hole on the short edge side of the hole forming portion. In the air blowing device which concerns on 3rd Embodiment, it is drawing which compared the aerodynamic noise reduction effect with the case where there is an auxiliary hole by the side of the short edge of a hole formation part, and the case where it does not exist. It is a typical front view of the air blowing apparatus which concerns on the 1st modification of 3rd Embodiment. It is a typical front view of the air blowing apparatus which concerns on the 2nd modification of 3rd Embodiment. It is a typical perspective view of the air blowing apparatus which concerns on 4th Embodiment. It is a typical front view of the air blowing apparatus which concerns on 4th Embodiment. It is XIX-XIX sectional drawing of FIG. It is explanatory drawing for demonstrating the velocity gradient of the airflow in the exit downstream of the blowing hole of the air blowing apparatus which concerns on 4th Embodiment. It is explanatory drawing for demonstrating the state of the side vortex and auxiliary vortex in the downstream of the exit of the blowing hole of the air blowing apparatus which concerns on 4th Embodiment. It is explanatory drawing for demonstrating the state of the auxiliary vortex in the air flow downstream of the vortex generating structure of the air blowing apparatus which concerns on 4th Embodiment. It is a typical front view of the air blowing apparatus which concerns on the 1st modification of 4th Embodiment. It is a typical front view of the air blowing apparatus which concerns on the 2nd modification of 4th Embodiment. It is a typical front view of the air blowing apparatus which concerns on the 3rd modification of 4th Embodiment. It is a typical front view of the air blowing apparatus which concerns on the 4th modification of 4th Embodiment. FIG. 27 is a sectional view taken along line XXVII-XXVII in FIG. 26. It is a typical front view of the air blowing apparatus which concerns on the 5th modification of 4th Embodiment. FIG. 29 is a sectional view taken along line XXIX-XXIX in FIG. 28. It is a typical front view of the air blowing apparatus which concerns on 5th Embodiment. FIG. 31 is a sectional view taken along the line XXXI-XXXI in FIG. 30. It is a typical perspective view of the vortex generator which concerns on 5th Embodiment. It is explanatory drawing for demonstrating the auxiliary vortex formed downstream of the vortex generator which concerns on 5th Embodiment. It is a typical front view of the air blowing apparatus which concerns on the 1st modification of 5th Embodiment. FIG. 35 is a cross-sectional view of XXXV-XXXV in FIG. 34. It is a typical front view of the air blowing apparatus which concerns on the 2nd modification of 5th Embodiment. It is a typical front view of the air blowing apparatus which concerns on the 3rd modification of 5th Embodiment. It is a typical front view of the air blowing apparatus which concerns on the 4th modification of 5th Embodiment. FIG. 39 is a sectional view of XXXIX-XXXIX in FIG. 38. It is a typical front view of the air blowing apparatus which concerns on the 5th modification of 5th Embodiment. It is a typical perspective view of the vortex generator used as the 1st modification of 5th Embodiment. It is a typical perspective view of the vortex generator used as the 2nd modification of 5th Embodiment. It is a typical perspective view of the vortex generator used as the 3rd modification of 5th Embodiment. It is a typical perspective view of the vortex generator used as the 4th modification of 5th Embodiment. It is explanatory drawing for demonstrating the opening shape of the blowing hole of the air blowing apparatus which concerns on 6th Embodiment. It is explanatory drawing for demonstrating the blowing hole used as the 1st modification of 6th Embodiment. It is explanatory drawing for demonstrating the blowing hole used as the 2nd modification of 6th Embodiment. It is explanatory drawing for demonstrating the blowing hole used as the 3rd modification of 6th Embodiment. It is explanatory drawing for demonstrating the blowing hole used as the 4th modification of 6th Embodiment. It is explanatory drawing for demonstrating the blowing hole used as the 5th modification of 6th Embodiment. It is explanatory drawing for demonstrating the blowing hole used as the 6th modification of 6th Embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following embodiments, the same or equivalent parts as those described in the preceding embodiments are denoted by the same reference numerals, and the description thereof may be omitted. Further, in the embodiment, when only a part of the constituent elements are described, the constituent elements described in the preceding embodiment can be applied to the other parts of the constituent elements. The following embodiments can be partially combined with each other even if they are not particularly specified as long as they do not cause any trouble in the combination.

(First embodiment)
This embodiment will be described with reference to FIGS. The air blowing device 1 of this embodiment is applied to an air outlet of an air conditioning unit that air-conditions a vehicle interior. And the blower outlet of an air-conditioning unit is provided inside the instrument panel or the instrument panel.

As shown in FIGS. 1 to 3, the air blowing device 1 serves as a duct portion 14 that forms a flow path 18 for allowing the working airflow Waf blown toward the blowing target 2 to pass therethrough, and a blowout port for the working airflow Waf. A hole forming portion 12 that forms the blowout hole 10 and a flange portion 40 are included.

The duct part 14 is a cylindrical member. The portion of the duct portion 14 upstream of the air flow is fitted into an air outlet of an air conditioning unit (not shown), and the portion of the air flow downstream side is connected to the outer periphery of the hole forming portion 12. A flow path 18 is formed inside the duct portion 14.

The hole forming part 12 is positioned on the air flow downstream side of the duct part 14. The hole formation part 12 is comprised by the cylinder shape so that air can be blown out.

The blowout hole 10 is opened as a single hole at the end of the hole forming portion 12. The blowing hole 10 has an opening shape that opens toward the blowing target 2 in order to blow out the working airflow Waf.

The opening shape of the blowout hole 10 is a flat shape. Here, the flat shape is a shape in which a pair of long edge portions 102 facing in the direction of the short axis Ss and a pair of short edge portions 104 facing in the direction of the long axis Ls are connected. The short axis Ss is orthogonal to the long axis Ls. The blow hole 10 is formed such that the short edge portion 104 is shorter than the long edge portion 102. The short axis Ss is a center line that passes through the respective center points of the opposed long edge portions 102, and the long axis Ls is a center line that passes through the respective center points of the opposed short edge portions 104.

The flat shape is, for example, an elliptical shape formed by combining a circular arc and a straight line, an elliptical shape formed by combining a circular arc having a large curvature radius and a circular arc having a small curvature radius, or a polygonal shape such as a hexagon combined with a straight line. Including a rectangular shape with rounded corners. Moreover, the shape of the long edge part 102 and the short edge part 104 is not limited to a straight line or a circular arc, and there may be an unevenness | corrugation.

As shown in FIG. 2, the opening shape of the blowout hole 10 includes a pair of long edges 102 extending linearly in the direction of the short axis Ss, and a pair of short edges 104 extending in an arc shape in the direction of the long axis Ls. Are formed in a row. The short edge portion 104 is a substantially semicircular arc, and the diameter thereof is smaller than that of the long edge portion 102.

More specifically, the peripheral edge portion 100 surrounding the blowout hole 10 includes a first edge portion 102a and a second edge portion 102b that face each other with a predetermined gap therebetween, and a first edge portion 102a and a second edge portion. It is comprised by the 3rd edge part 104a and the 4th edge part 104b which connect the both ends of 102b. The 3rd edge part 104a is a site | part which connects the ends of the 1st edge part 102a and the 2nd edge part 102b. The fourth edge 104b is a part that connects the other ends of the first edge 102a and the second edge 102b.

The first edge portion 102a and the second edge portion 102b extend in a straight line with a certain interval. The first edge portion 102a and the second edge portion 102b are longer in length along the edge than the third edge portion 104a and the fourth edge portion 104b, and the distance between the third edge portion 104a and the fourth edge portion 104b. It is opposed at a smaller interval. The first edge portion 102a and the second edge portion 102b constitute the pair of long edge portions 102 described above.

Further, the third edge 104a and the fourth edge 104b are curved in an arc shape. The third edge portion 104a and the fourth edge portion 104b are shorter in length along the edge than the first edge portion 102a and the second edge portion 102b, and the distance between the first edge portion 102a and the second edge portion 102b. It is opposed at a larger interval. The third edge portion 104a and the fourth edge portion 104b constitute the pair of short edge portions 104 described above.

The hole forming part 12 has a plurality of auxiliary holes 202 formed as the vortex generating structure 20. Specifically, the plurality of auxiliary holes 202 are formed along the pair of long edge portions 102 and the pair of short edge portions 104 along the entire peripheral edge portion 100 of the blowout hole 10 with a certain interval. Yes.

The area of the opening of the auxiliary hole 202 is smaller than the area of the opening of the blowing hole 10. The auxiliary hole 202 has a circular shape. As shown in FIG. 3, the auxiliary hole 202 is formed through the inside of the hole forming portion 12 along the extending direction of the flow path 18. The hole forming portion 12 may be formed so that the upstream side of the air flow extends to the flange portion 40. In this case, the auxiliary hole 202 is formed through the hole forming portion 12 to the flange portion 40.

The flange portion 40 is provided so as to protrude from the duct portion 14 with respect to the outer periphery of the duct portion 14. The flange portion 40 is configured by a rectangular member with rounded corners. The flange part 40 is a member for attaching with respect to the instrument panel which is not shown in figure. The flange portion 40 is attached to the instrument panel by a connecting member such as a screw in a state where the upstream portion of the duct portion 14 is fitted to the air outlet of the air conditioning unit. The flange portion 40 is provided with through holes 402 through which connecting members such as screws are passed in the vicinity of the four corners forming the corner portions.

Each of the hole formation part 12, the duct part 14, and the flange part 40 which comprises the air blowing apparatus 1 is comprised with resin. The hole forming portion 12, the duct portion 14, and the flange portion 40 are formed of an integrally molded product that is integrally formed by a molding technique such as injection molding. In addition, the hole formation part 12, the duct part 14, and the flange part 40 may be comprised in the part separately. The air blowing device 1 configured as described above is installed on an instrument panel (not shown) as described above.

Here, the air blowing device 1 is attached to the air conditioning unit inside the instrument panel installed at the foremost part in the passenger compartment. In this case, the conditioned air whose temperature is adjusted by the air conditioning unit is blown out from the air blowing device 1. At this time, the conditioned air may not only be used for air conditioning of the entire vehicle interior, but may be required to be directly blown out to passengers in the vehicle interior. In this case, it is necessary not only to blow out to the occupants of the driver seat in the front row in the vehicle interior, but also to blow out to the occupants of the rear seat in the rear row, and the working airflow Waf is required to increase the reach distance.

Therefore, the present inventors examined a factor that shortens the reach of the working airflow Waf. In the vicinity of the outlet downstream of the blowout hole 10, the innumerable lateral vortex Vt generated in the velocity boundary layer BL is synthesized and developed into a large-scale one, so that the air drawing action becomes stronger. The knowledge that it becomes one of the factors for shortening the reach of Waf was obtained.

The air drawing action is caused by the lateral vortex Vt generated by the shearing force due to the velocity gradient of the working airflow Waf when the working airflow Waf is blown out. Hereinafter, the horizontal vortex Vt generated by the air drawing action and the working airflow Waf will be described with reference to FIGS. 4 and 5.

FIG. 4 is a schematic view showing a first outlet serving as a first comparative example of the air blowing device 1 of the present embodiment. The opening shape of the blowout hole 10 of the first blowout port is an oval shape formed by combining a circular arc and a straight line. In addition, in the 1st comparative example, the thing equivalent to the auxiliary hole 202 is not provided in the hole formation part 12 of a 1st blower outlet.

As shown in FIG. 4, when an airflow is blown out from the blowout hole 10 of the duct portion 14, a speed difference between the airflow from the blowout hole 10 and the air stationary around the airflow is provided downstream of the blowout hole 10. As a result, the velocity boundary layer BL is formed. The velocity boundary layer BL is a layer that is affected by stationary air among the airflows blown from the blowout holes 10.

In the velocity boundary layer BL, an infinite number of transverse vortices Vt are generated by the shearing force due to the velocity gradient, as shown in FIG. According to the study by the present inventors, it has been found that the inducing action of air becomes stronger when the innumerable transverse vortex Vt generated in the velocity boundary layer BL is synthesized and developed into a large scale.

The present inventors collide an auxiliary vortex Vs having a vortex characteristic different from that of the horizontal vortex Vt with the lateral vortex Vt generated in the velocity boundary layer BL of the working airflow Waf in a state where the vortex characteristics are different, thereby causing the lateral vortex Vt to collide. Therefore, it was considered that the reach of the working airflow Waf can be increased. Therefore, the vortex generating structure 20 for generating the auxiliary vortex Vs is formed in the hole forming portion 12.

Here, the vortex characteristics indicate the vortex flow state including the vortex rotation direction, vortex axis direction, vortex flow velocity, fluid viscosity, vortex radius, and the like.

The state of the working airflow Waf downstream of the outlet of the air outlet 10 of the air outlet 1 according to the first embodiment will be described with reference to FIGS.

In the air blowing device 1 of the present embodiment, when the conditioned air whose temperature has been adjusted by the air conditioning unit flows into the duct portion 14, the conditioned air flows into the blowing hole 10 and the auxiliary hole 202 through the flow path 18.

As shown in FIG. 6, when the working airflow Waf is blown out from the blowout hole 10, a velocity boundary layer BL of the working airflow Waf is formed downstream of the outlet of the blowout hole 10. The velocity boundary layer BL extends so as to be continuous with the inner wall surface 110 of the blowing hole 10 at the downstream side of the outlet of the blowing hole 10. As a result, innumerable transverse vortices Vt are generated downstream of the outlet of the blowout hole 10.

As shown in FIG. 7, the countless transverse vortex Vt generated downstream of the outlet of the blow hole 10 has a vortex axis that intersects the flow direction of the working air flow Waf, and goes straight in the same direction as the flow direction of the working air flow Waf. In addition to the component, it has a rotation component from the inside to the outside of the blowing hole 10.

Further, when the auxiliary airflow Saf is blown out from the auxiliary hole 202, the velocity boundary layer BL of the auxiliary airflow Saf is formed on the downstream side of the outlet of the auxiliary hole 202. The velocity boundary layer BL extends so as to be continuous with the inner wall surface 210 of the auxiliary hole 202 at the downstream side of the outlet of the auxiliary hole 202. Thereby, innumerable auxiliary vortices Vs are generated on the downstream side of the outlet of the auxiliary hole 202.

The countless auxiliary vortex Vs generated downstream of the auxiliary hole 202 has a vortex axis that intersects the flow direction of the auxiliary airflow Saf, and in addition to the straight component that goes in the same direction as the flow direction of the auxiliary airflow Saf, 202 has a rotational component from the inside to the outside. A part of the auxiliary vortex Vs differs from the transverse vortex Vt in at least the direction of rotation of the vortex characteristics. The flow direction of the auxiliary airflow Saf is the same flow direction as that of the working airflow Waf.

For this reason, at the outlet downstream of the auxiliary hole 202 (that is, downstream of the outlet hole 10), the auxiliary vortex Vs having a different vortex rotation direction collides with the horizontal vortex Vt. When the horizontal vortex Vt and the auxiliary vortex Vs collide, the horizontal vortex Vt is greatly disturbed, so that it is difficult to synthesize the horizontal vortex Vt. That is, the development of the lateral vortex Vt generated downstream of the outlet of the blow hole 10 is suppressed. As a result, the air draw-in effect in the working airflow Waf is suppressed, so that the working airflow Waf has a long reach.

In the air blowing device 1 described above, the vortex generating structure 20 is realized by the auxiliary holes 202 formed in the hole forming portion 12. Thereby, the drawing-in action of the air drawn into the working airflow Waf is suppressed, and the attenuation of the flow velocity of the working airflow Waf is reduced, so that the working airflow Waf has a long reach.

In addition, when the conditioned air whose temperature is adjusted by the air conditioning unit is blown out from the blow hole 10 as the working air current Waf, the working air current Waf suppresses the air pull-in action from the surroundings, so that the temperature change of the working air current Waf can be suppressed. it can. That is, according to the air blowing device 1 of the present embodiment, an airflow having an appropriate temperature can be reached at a desired location, which is particularly effective in realizing spot-like air conditioning in the passenger compartment.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. This embodiment is different from the first embodiment in that a plurality of auxiliary holes 202 are formed to be biased toward the edge of the long edge portion 102. In the present embodiment, portions different from the first embodiment will be mainly described, and description of portions similar to the first embodiment may be omitted.

As shown in FIGS. 8 and 9, the opening shape of the blowout hole 10 includes a pair of long edges 102 extending linearly in the direction of the short axis Ss and a pair of short edges extending in an arc shape in the direction of the long axis Ls. It is a flat shape formed continuously with the portion 104.

In addition, the number of the plurality of auxiliary holes 202 formed along the peripheral edge portion 100 surrounding the blowing hole 10 is a pair of long edge portions as compared with the number formed along the edge sides of the pair of short edge portions 104. Many are formed along the edge side of 102. That is, the ratio of the openings of the plurality of auxiliary holes 202 in the hole forming portion 12 is larger than the ratio per predetermined area in the entire pair of short edges 104 side in the entire pair of long edges 102 side. The area per predetermined area is larger.

Here, when the opening shape of the blowout hole 10 is a flat shape, when the working airflow Waf is blown out from the blowout hole 10, a lateral vortex Vt is generated downstream of the short edge portion 104 and downstream of the long edge portion 102. . As a result of intensive studies by the present inventors, the lateral vortex Vt generated downstream of the outlet of the short edge portion 104 reaches the arrival of the working airflow Waf as compared with the lateral vortex Vt generated downstream of the outlet of the long edge portion 102. It was found that the effect on distance was small.

This is because the lateral vortex Vt generated downstream of the short edge 104 is separated from the potential core P of the working airflow Waf as compared to the lateral vortex Vt generated downstream of the long edge 102. I think that. That is, the reach distance of the working airflow Waf is the distance from the lateral vortex Vt generated downstream of the outlet of the long edge portion 102 and the lateral vortex Vt generated downstream of the outlet of the short edge portion 104 and the potential airflow Waf from the potential core P. It seems to be affected. According to such an idea, the lateral vortex Vt generated downstream of the outlet of the long edge portion 102 has an influence on the reach of the working airflow Waf as compared with the lateral vortex Vt generated downstream of the outlet of the short edge portion 104. Can be said to be large.

Therefore, the present inventors have the case where the auxiliary holes 202 are formed along the entire peripheral edge portion 100 of the blowout hole 10 even when the plurality of auxiliary holes 202 are formed to be biased toward the edge of the long edge portion 102. It was considered that the reach of the working airflow Waf was comparable.

Hereinafter, the potential core P will be described with reference to FIG. FIG. 10 is an explanatory diagram for explaining the potential core P of the airflow at the outlet downstream of the second outlet, which is the second comparative example. The opening shape of the blowout hole 10 of the second blowout port is formed in an oval shape having a shape obtained by combining a circular arc and a straight line. The auxiliary hole 202 is not formed in the peripheral edge portion 100 of the outlet hole 10 of the second outlet.

As shown in FIG. 10, when the working airflow Waf is blown out from the blowing hole 10, countless transverse vortices Vt are generated along the peripheral edge portion 100 of the blowing hole 10 downstream of the outlet hole 10. Then, as the distance from the blow hole 10 increases, the horizontal vortex Vt develops by combining innumerable horizontal vortices Vt, and the action of drawing air becomes stronger. As a result, the wind speed of the working airflow Waf decreases.

Here, at the outlet downstream of the blowout hole 10, a potential core P that is a region where the airflow is less disturbed and the airflow speed and airflow pressure are stable is generated around the blowout hole 10. The potential core P is a region that is not easily affected by ambient air. Therefore, the working airflow Waf is unlikely to decrease in wind speed in the potential core P, and has the longest reach.

Here, the potential core P becomes smaller as the cross-sectional shape in the direction orthogonal to the flow direction of the working airflow Waf moves away from the blowout hole 10. Further, when the shape of the blowout hole 10 is a flat shape, the potential core P converges from a flat shape toward the downstream of the flow of the working air flow Waf to a circular shape toward the center of the flat shape. .

On the other hand, since the plurality of lateral vortices Vt generated downstream of the outlet hole 10 are generated along the inner wall surface 110 of the outlet hole 10, the plurality of lateral vortices Vt have a flat shape close to the shape of the outlet hole 10. To spread. Therefore, the lateral vortex Vt generated downstream of the short edge 104 is generated at a position farther from the potential core P than the lateral vortex Vt generated downstream of the long edge 102.

The present inventors collide an auxiliary vortex Vs having a vortex characteristic different from that of the horizontal vortex Vt into the lateral vortex Vt generated downstream of the outlet of the long edge portion 102 in a state where the vortex characteristic is different, thereby We thought that the reach could be increased. Therefore, the present inventors decided to form the plurality of auxiliary holes 202 so as to be biased toward the edge side of the long edge portion 102.

In this embodiment, since the opening shape of the blowing hole 10 is a flat shape, the lateral vortex Vt generated downstream of the outlet of the short edge portion 104 is compared with the lateral vortex Vt generated downstream of the outlet of the long edge portion 102. It is generated at a position away from the potential core P of the working airflow Waf. Therefore, the lateral vortex Vt generated downstream of the short edge portion 104 has less influence on the reach of the working airflow Waf than the lateral vortex Vt generated downstream of the long edge portion 102.

The plurality of auxiliary holes 202 are formed so as to be biased toward the edge sides of the pair of long edge portions 102. The auxiliary vortex Vs generated downstream of the auxiliary hole 202 collides with the horizontal vortex Vt generated downstream of the pair of long edge portions 102 in a state where the vortex rotation direction is different. When the lateral vortex Vt having a large influence on the reach of the working airflow Waf collides with the auxiliary vortex Vs, the lateral vortex Vt is greatly disturbed, so that it is difficult to synthesize the lateral vortex Vt. As a result, the air pulling action in the working airflow Waf is suppressed, so that the working airflow Waf has a long reach.

Here, when the lateral vortex Vt collides with the auxiliary vortex Vs, aerodynamic noise is generated by the collision of the lateral vortex Vt and the auxiliary vortex Vs. In the present embodiment, the number of the plurality of auxiliary holes 202 is less on the edge side of the pair of short edges 104 than in the first embodiment. Therefore, compared with the case where it forms along the whole peripheral part 100 of the blowing hole 10, the collision of the horizontal vortex Vt and the auxiliary vortex Vs can be suppressed. As a result, it is possible to reduce aerodynamic noise caused by the collision between the lateral vortex Vt and the auxiliary vortex Vs while increasing the reach distance of the working airflow Waf.

(Modification of the second embodiment)
In the above-described second embodiment, the example in which the auxiliary hole 202 having the same shape and size is formed to be biased toward the edge side of the long edge portion 102 has been described, but the present invention is not limited to this. For example, the auxiliary hole 202 formed on the edge side of the short edge portion 104 is longer than the edge side of the pair of short edge portions 104 so that the auxiliary vortex Vs is easily generated on the edge side of the pair of long edge portions 102. The auxiliary hole 202 formed on the edge side of the edge 102 may be different in shape and size. Specifically, the auxiliary hole 202 formed on the edge side of the short edge portion 104 has one larger than the auxiliary hole 202 formed on the edge side of the long edge portion 102 and the other formed smaller, One may be formed in a circular shape and the other may be formed in a polygonal shape.

The vortex characteristics of the lateral vortex Vt generated downstream of the outlet of the auxiliary hole 202 vary depending on the shape and size of the auxiliary hole 202. For this reason, it is desirable that the shape and size of the auxiliary hole 202 be appropriately set according to the use application of the air blowing device 1.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. This embodiment is different from the second embodiment in that a plurality of auxiliary holes 202 are formed on the edge side of the long edge portion 102 and are not formed on the edge sides of the pair of short edge portions 104. In the present embodiment, portions different from those in the second embodiment will be mainly described, and description of portions similar to those in the second embodiment may be omitted.

Specifically, as shown in FIGS. 11 and 12, the plurality of auxiliary holes 202 are not formed along the edge sides of the pair of short edges 104, but along the edges of the pair of long edges 102. Only formed.

In the present embodiment, the auxiliary vortex Vs generated along the pair of long edges 102 collides with the lateral vortex Vt generated downstream of the long edge 102, thereby generating downstream of the long edge 102. Development of the transverse vortex Vt can be suppressed.

Here, FIG. 13 shows the reach of the working airflow Waf when the auxiliary hole 202 is formed along the edge side of the pair of short edges 104 and when the auxiliary hole 202 is not formed. The left graph of FIG. 13 shows the arrival rate of the working airflow Waf when the auxiliary hole 202 is formed, and the right graph of FIG. 13 shows the arrival rate of the working airflow Waf when the auxiliary hole 202 is not formed. Show. As shown in FIG. 13, the reach of the working airflow Waf is the same when the auxiliary hole 202 is formed along the edge side of the pair of short edges 104 and when the auxiliary hole 202 is not formed.

FIG. 14 shows aerodynamic noise generated by the collision of the lateral vortex Vt and the auxiliary vortex Vs when the auxiliary hole 202 is formed along the edge side of the pair of short edges 104 and when the auxiliary hole 202 is not formed. The left graph of FIG. 14 shows aerodynamic noise when the auxiliary hole 202 is formed, and the right graph of FIG. 14 shows aerodynamic noise when the auxiliary hole 202 is not formed. As shown in FIG. 14, when the auxiliary hole 202 is not formed along the edge side of a pair of short edge part 104, aerodynamic noise can be reduced compared with the case where the auxiliary hole 202 is formed.

Here, the instrument panel is required to be downsized from the viewpoint of expansion of the passenger compartment and design. In addition, the instrument panel tends to be provided with a large information device for displaying a vehicle state or the like at a center portion in the vehicle width direction or a portion facing the passenger in the vehicle front-rear direction. Therefore, it is necessary to take measures such as making the blow hole 10 thin.

According to the present embodiment, the auxiliary hole 202 is not formed along the edge sides of the pair of short edges 104. Therefore, in the hole forming portion 12, the forming portion for forming the auxiliary hole 202 is unnecessary on the edge side of the pair of short edge portions 104. As a result, the hole forming portion 12 and the duct portion 14 can be formed smaller than those in the first embodiment and the second embodiment, and an effect of improving the degree of freedom of installation and the degree of freedom of mounting of the air blowing device 1 can be obtained. it can.

(Modification of the third embodiment)
In the third embodiment described above, an example in which the auxiliary hole 202 is formed in a circular shape has been described. However, the present invention is not limited to this. For example, as shown in the first modification of FIG. 15, the auxiliary hole 202 may be formed in a slit shape.

Moreover, in the above-mentioned 3rd Embodiment, about the opening shape of the blowing hole 10, a pair of long edge part 102 extended linearly in the direction of the short axis Ss, and a pair of short edge extended in circular arc shape in the direction of the long axis Ls Although the example in which the portion 104 is formed continuously is described, it is not limited to this. For example, as shown in the second modification of FIG. 16, the opening shape of the blowout hole 10 includes a pair of long edge portions 102 extending in the short axis Ss direction and a pair of short edge portions 104 extending in the long axis Ls direction. They may all be connected in a straight line and formed in a rectangular shape.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIGS. In the present embodiment, the vortex generating structure 20 is the first embodiment in that the concave portions 206 and the convex portions 208 are alternately arranged along the peripheral edge portion 100 including the blowout hole 10 in the hole forming portion 12. It is different from the form. In the present embodiment, portions different from the first embodiment will be mainly described, and description of portions similar to the first embodiment may be omitted.

As shown in FIGS. 17 and 18, the vortex generating structure 20 includes a plurality of concave and convex portions 204 in which concave portions 206 and convex portions 208 are alternately arranged along the peripheral edge portion 100 including the blowout hole 10 in the hole forming portion 12. Is formed. Further, the opening shape of the blowout hole 10 is formed by a pair of sawtooth-shaped long edges 102 extending in the direction of the short axis Ss and a pair of short edges 104 extending in an arc shape in the direction of the long axis Ls. It is a flat shape. Here, the sawtooth shape is a shape in which the bases of a plurality of triangles are continuously arranged.

Specifically, the triangle is a substantially isosceles triangle having one base and two equal sides, and the base is arranged along the long edge portion 102 without a gap. Further, the vertices of the substantially isosceles triangle are formed so as to protrude from the pair of long edge portions 102 toward the vertices of the substantially isosceles triangle of the opposing long edge portion 102. The area of each approximately isosceles triangle is smaller than the area of the opening of the blow hole 10 so as not to hinder the flow of the working airflow Waf blown from the blow hole 10.

Further, the plurality of concavo-convex portions 204 are not formed along the edge sides of the pair of short edge portions 104 but are formed only along the edge sides of the pair of long edge portions 102.

Note that the plurality of uneven portions 204 may be formed along the short edge portion 104 in addition to the long edge portion 102.

The cross section of the blowout hole 10 will be described with reference to FIG. As shown in FIG. 19, the plurality of concavo-convex portions 204 are configured in a plate shape having a thickness in the air flow direction. That is, the plurality of concavo-convex portions 204 have a rectangular shape when the cross section is the cross section.

In addition, the plate surface on the downstream side of the air flow of the plurality of concave and convex portions 204 is flush with the end surface on the downstream side of the air flow in the portion of the hole forming portion 12 where the peripheral edge portion 100 is formed. In other words, the plurality of concavo-convex portions 204 have a plate surface on the downstream side of the air flow that is flush with an end surface of the hole forming portion 12 where the blowout holes 10 are opened.

The states of the working airflow Waf, the lateral vortex Vt, and the auxiliary vortex Vs downstream of the outlet hole 10 of the air blowing device 1 according to the fourth embodiment will be described with reference to FIGS.

In the air blowing device 1 of the present embodiment, when the conditioned air whose temperature has been adjusted by the air conditioning unit flows into the duct portion 14, the conditioned air flows into the blowing hole 10 through the flow path 18.

As shown in FIG. 20, when the working airflow Waf is blown out from the blowout hole 10, the velocity boundary layer BL is formed. As a result, innumerable transverse vortices Vt are generated downstream of the outlet of the blowout hole 10.

As shown in FIG. 21, the countless transverse vortex Vt generated downstream of the outlet of the blow hole 10 has a vortex axis that intersects the flow direction of the working air flow Waf and goes straight in the same direction as the flow direction of the working air flow Waf. In addition to the component, it has a rotation component from the inside to the outside of the blowing hole 10.

Further, when the working airflow Waf is blown out from the gaps between the plurality of uneven portions 204 having a substantially isosceles triangle shape, countless auxiliary vortices Vs are generated on the downstream side of the air flow of the plurality of uneven portions 204.

As shown in FIG. 22, innumerable auxiliary vortices Vs are generated on the downstream side of the air flow of the plurality of concave and convex portions 204 having a substantially isosceles triangle shape and on the respective equilateral sides of the substantially isosceles triangle. The auxiliary vortex Vs has a vortex axis perpendicular to the equilateral sides of a substantially isosceles triangle. Further, the rotation directions of the auxiliary vortex Vs generated on the respective equilateral sides of the substantially isosceles triangle are opposite to each other. That is, innumerable auxiliary vortices Vs have different vortex characteristics and at least the vortex rotation direction and vortex axis direction of the transverse vortex Vt.

For this reason, the auxiliary vortex Vs having a different vortex rotation direction and vortex axis from the lateral vortex Vt collides with the lateral vortex Vt at the outlet downstream of the blowout hole 10, which is downstream of the uneven portion 204. When the horizontal vortex Vt and the auxiliary vortex Vs collide, the horizontal vortex Vt is greatly disturbed, so that it is difficult to synthesize the horizontal vortex Vt. That is, the development of the lateral vortex Vt generated downstream of the outlet of the blow hole 10 is suppressed. As a result, the air draw-in effect in the working airflow Waf is suppressed, so that the working airflow Waf has a long reach.

Further, in the present embodiment, the plurality of uneven portions 204 are not formed along the edge sides of the pair of short edges 104 but are formed only along the edges of the pair of long edges 102. Therefore, the collision of the lateral vortex Vt and the auxiliary vortex Vs can be suppressed as compared with the case where the plurality of uneven portions 204 are formed along the entire peripheral edge portion 100. Thereby, the aerodynamic noise generated by the collision of the lateral vortex Vt and the auxiliary vortex Vs can be reduced while increasing the reach distance of the working airflow Waf.

Moreover, in this embodiment, since the several uneven | corrugated | grooved part 204 is formed only along the edge side of a pair of long edge part 102, the edge side of a pair of short edge part 104 is for forming the uneven | corrugated | grooved part 204. A forming part is unnecessary. Thereby, compared with the case where the several uneven | corrugated | grooved part 204 is formed along the whole peripheral part 100, the hole formation part 12 and the duct part 14 can be formed small, and installation of the air blowing apparatus 1 is free. The effect of improving the degree of freedom and mounting can be obtained.

Further, the plurality of concavo-convex portions 204 are configured as a plate having a thickness in the air flow direction. Accordingly, for example, the auxiliary vortex Vs is likely to be generated when the airflow passes between the concavo-convex portions 204 as compared to a case where the plurality of concavo-convex portions 204 are formed to extend to the flange portion 40, for example. Thereby, the drawing-in action of the air drawn into the working airflow Waf is suppressed, and the working airflow Waf has a long reach distance.

In addition, the plurality of concavo-convex portions 204 have a plate surface on the downstream side of the air flow that is flush with an end surface on the downstream side of the air flow at a portion forming the peripheral edge portion 100 in the hole forming portion 12. According to this, the position where the auxiliary vortex Vs is generated by the concavo-convex portion 204 approaches the position where the horizontal vortex Vt starts to occur in the hole forming portion 12, and the auxiliary vortex Vs easily collides with the horizontal vortex Vt. Can be sufficiently suppressed.

(Modification of the fourth embodiment)
In the fourth embodiment described above, the example in which the plurality of uneven portions 204 are formed in a sawtooth shape in which substantially isosceles triangles are continuously arranged has been described. However, the present invention is not limited to this. For example, as shown in the first modified example of FIG. 23, the plurality of uneven portions 204 may be formed in a rectangular shape. Moreover, as shown in the 2nd modification of FIG. 24, the shape of the some uneven | corrugated | grooved part 204 may be formed in circular arc shape. Moreover, as shown in the 3rd modification of FIG. 25, the shape of the some uneven | corrugated | grooved part 204 may be formed in a wave shape. Moreover, the shape of the plurality of concavo-convex portions 204 may be formed in a substantially regular triangle shape or a substantially right triangle shape. In addition, the shape of the plurality of concave and convex portions 204 may be formed by combining triangular shapes, rectangular shapes, arc shapes, wave shapes, and the like. Further, the concave portion 206 and the convex portion 208 may be formed side by side with a certain gap.

Further, in the above-described fourth embodiment, an example in which the vertices of approximately isosceles triangles are formed so as to protrude toward the vertices of approximately isosceles triangles of the opposed long edge portions 102 in the plurality of uneven portions 204 is described. However, it is not limited to this. For example, as shown in a fourth modification of FIG. 26, the apex of a substantially isosceles triangle may be formed inside the duct portion 14 so as to protrude in the upstream direction of the air flow. Specifically, as shown in FIG. 27 regarding the cross section of the fourth modified example, the plurality of uneven portions 204 may be formed to be inclined in the air flow upstream direction of the duct portion 14. Moreover, as shown in the 5th modification of FIG. 28, the vertex of a substantially isosceles triangle may protrude outside the duct part 14 toward the air flow downstream direction. Specifically, as shown in FIG. 29 regarding the cross section of the fifth modified example, the plurality of uneven portions 204 may be formed to be inclined in the air flow downstream direction of the duct portion 14.

In the above-described fourth embodiment, the example in which the plurality of concave and convex portions 204 are formed in a plate shape has been described. However, the present invention is not limited to this. For example, if the shape of the plurality of concavo-convex portions 204 on the opening side of the blowout hole 10 is a triangular shape, the shape of the inner portion of the hole forming portion 12 is a triangular pyramid or a triangular prism shape, and the like from the end of the hole forming portion 12 It may be formed by extending the inside of the duct portion 14 toward the air flow upstream.

Moreover, although the example in which the shape of the plurality of concavo-convex portions 204 is formed to protrude toward the inside of the blowout hole 10 has been described, it is not limited thereto. The plurality of concavo-convex portions 204 are formed to be recessed from the peripheral edge portion 100 of the blowout hole 10 toward the outside of the blowout hole 10, or the plurality of concavo-convex portions 204 are formed to protrude outward from the blowout hole 10. It may be formed by alternately arranging noodles.

In the above-described fourth embodiment, the vortex generating structure 20 has been described with respect to the example including the plurality of uneven portions 204, but is not limited thereto. The vortex generating structure 20 may include a plurality of auxiliary holes 202 exemplified in the first embodiment in addition to the plurality of uneven portions 204.

(Fifth embodiment)
Next, a fifth embodiment will be described with reference to FIGS. The present embodiment is different from the first embodiment in that the vortex generating structure 20 has a structure including a plurality of vortex generators 22. In the present embodiment, portions different from the first embodiment will be mainly described, and description of portions similar to the first embodiment may be omitted.

30, the vortex generating structure 20 is formed by a plurality of vortex generators 22 arranged side by side along the peripheral edge portion 100 including the blowout hole 10 in the hole forming portion 12. Moreover, the opening shape of the blowout hole 10 is a flat shape, and is formed by a pair of long edge portions 102 extending linearly and a pair of short edge portions 104 extending in an arc shape.

The plurality of vortex generators 22 are formed of a disk-shaped member having a circular shape when viewed from the opening direction of the blowout hole 10. The plurality of vortex generators 22 are arranged side by side along the peripheral edge portion 100 including the blowout hole 10 at equal intervals inside the blowout hole 10. The plurality of vortex generators 22 have a smaller area than the area of the opening of the blowout hole 10 so as not to hinder the flow of the working airflow Waf blown from the blowout hole 10. The plurality of vortex generators 22 may be arranged side by side along the peripheral edge 100 including the blowout holes 10 at unequal intervals inside the blowout holes 10.

The plurality of vortex generators 22 are supported by a support portion 23 extending in a predetermined direction orthogonal to the opening direction of the blow hole 10 inside the blow hole 10 so as not to directly contact the peripheral edge portion 100. . Specifically, each of the plurality of vortex generators 22 is connected to a tip portion of a rod-like support portion 23 that protrudes inward from the peripheral edge portion 100.

Further, the plurality of vortex generators 22 are arranged so as to be biased toward the edge sides of the pair of long edge portions 102 rather than the edge sides of the pair of short edge portions 104. Specifically, the plurality of vortex generators 22 are not disposed along the edge sides of the pair of short edges 104 but are disposed along the edges of the pair of long edges 102. The plurality of vortex generators 22 may be formed along the short edge portion 104 in addition to the long edge portion 102.

As shown in FIG. 31, the plurality of vortex generators 22 are configured by a plate-like member having a thickness in the opening direction of the blowout hole 10. Specifically, as shown in FIG. 32, the plurality of vortex generators 22 are circular when viewed from the opening direction of the blowing hole 10 and are viewed from a direction orthogonal to the opening direction of the blowing hole 10. It is comprised with the disk-shaped member used as a square shape.

Also, the plate surface on the downstream side of the air flow of the plurality of vortex generators 22 is flush with the end surface on the downstream side of the air flow of the hole forming portion 12 where the peripheral edge portion 100 is formed. In other words, in the plurality of vortex generators 22, the plate surface on the downstream side of the air flow is flush with the end surface of the hole forming portion 12 where the blowout hole 10 opens.

In the air blowing device 1 configured as described above, when the conditioned air whose temperature is adjusted by the air conditioning unit flows into the duct portion 14, the conditioned air flows into the blowing hole 10 through the flow path 18. Then, when the working airflow Waf is blown out from the blowing hole 10, innumerable transverse vortices Vt are generated downstream of the outlet of the blowing hole 10.

In the air blowing device 1 of the present embodiment, a plurality of vortex generators 22 are arranged inside the blowing hole 10. For this reason, a part of the conditioned air flowing into the blowout hole 10 through the flow path 18 is blown into the room after passing around the plurality of vortex generators 22. When the conditioned air passes around the plurality of vortex generators 22, the airflow flowing along the plate surface of the vortex generators 22 is peeled off from the outer edge, so that all-round separated vortices having various vortex axes are generated. . Thereby, as shown in FIG. 33, innumerable auxiliary vortices Vs are generated on the downstream side of the air flow of the plurality of vortex generators 22. The auxiliary vortex Vs is generated on the downstream side of the air flow of the vortex generator 22. The auxiliary vortex Vs differs from the transverse vortex Vt in vortex characteristics at least in the direction of the vortex rotation and the direction of the vortex axis.

Therefore, on the downstream side of the outlet of the blowout hole 10, the auxiliary vortex Vs whose vortex rotation direction and vortex axis direction are different from the horizontal vortex Vt collides with the horizontal vortex Vt. When the horizontal vortex Vt and the auxiliary vortex Vs collide, the horizontal vortex Vt is greatly disturbed, so that it is difficult to synthesize the horizontal vortex Vt. That is, the development of the lateral vortex Vt generated downstream of the outlet of the blow hole 10 is suppressed. As a result, the air draw-in effect in the working airflow Waf is suppressed, so that the working airflow Waf has a long reach.

Further, the plurality of vortex generators 22 are arranged along the edge sides of the pair of long edges 102 and are not arranged on the edges of the pair of short edges 104. For this reason, compared with the case where the some vortex generator 22 is formed along the whole peripheral part 100, the collision of the horizontal vortex Vt and the auxiliary vortex Vs can be suppressed. Thereby, the aerodynamic noise generated by the collision of the lateral vortex Vt and the auxiliary vortex Vs can be reduced. Moreover, the reduction of the opening area of the blowing hole 10 accompanying the addition of the plurality of vortex generators 22 can be suppressed.

Here, if the vortex generator 22 is formed directly with respect to the peripheral portion 100, an air flow does not occur at the portion where the vortex generator 22 and the peripheral portion 100 are in direct contact, and therefore the auxiliary vortex Vs cannot be generated.

On the other hand, the plurality of vortex generators 22 of the present embodiment extend in a predetermined direction orthogonal to the opening direction of the blow hole 10 inside the blow hole 10 so as not to be in direct contact with the peripheral edge portion 100. It is supported by the support part 23. Thus, if it is set as the structure which supports the vortex generator 22 with the support part 23, the vortex generator 22 can be spaced apart from the peripheral part 100. FIG. As a result, the auxiliary vortex Vs can be generated in substantially the entire outer peripheral edge of the vortex generator 22. For this reason, even if a lateral vortex Vt is generated between the vortex generator 22 and the peripheral edge 100, the development of the lateral vortex Vt can be suppressed by the auxiliary vortex Vs generated at the outer periphery of the vortex generator 22. it can.

Further, the plurality of vortex generators 22 are configured by a plate-like member having a thickness in the opening direction of the blowout hole 10. According to this, the auxiliary vortex Vs is easily generated when the airflow passes between the vortex generators 22. As a result, the auxiliary vortex Vs can easily collide with the horizontal vortex Vt, so that the development of the horizontal vortex Vt can be sufficiently suppressed.

Particularly, in the plurality of vortex generators 22, the plate surface on the downstream side of the air flow is flush with the end surface on the downstream side of the air flow of the portion forming the peripheral edge 100 in the hole forming portion 12. According to this, the position where the auxiliary vortex Vs is generated by the vortex generator 22 approaches the position where the horizontal vortex Vt starts to be generated in the hole forming portion 12, and the auxiliary vortex Vs easily collides with the horizontal vortex Vt. The development of Vt can be sufficiently suppressed.

(Modification of the fifth embodiment)
In the fifth embodiment described above, the plurality of vortex generators 22 are illustrated as being connected to the distal end portion of the rod-like support portion 23 protruding inward from the peripheral edge portion 100, but the present invention is not limited to this. The plurality of vortex generators 22 are, for example, L-shaped extending from the inner wall surface of the duct portion 14 forming the flow path 18 toward the blowout hole 10 as shown in the first modification of FIGS. 34 and 35. It may be supported by the support part 23.

In the above-described fifth embodiment, the example in which each of the plurality of vortex generators 22 is supported by separate support portions 23 is illustrated, but the present invention is not limited to this. For example, as shown in the second modified example of FIG. 36, at least a part of the plurality of vortex generators 22 may be supported by a support portion 23 that extends along the extending direction of the pair of long edge portions 102. Good.

Further, for example, as shown in a third modification of FIG. 37, the plurality of vortex generators 22 are supported by a support portion 23 at least partially extending in a direction orthogonal to the extending direction of the pair of long edge portions 102. May be.

As shown in the fourth modified example of FIGS. 38 and 39, when the louver 24 for adjusting the air direction or the air volume is arranged inside the blow hole 10 or the flow path 18, the louver 24 A plurality of vortex generators 22 may be supported. In this case, the louver 24 constitutes a support portion that supports the plurality of vortex generators 22. According to this, even if the attitude of the louver 24 is changed to change the wind direction or the like, the attitude of the plurality of vortex generators 22 can be changed following the change. That is, it is possible to change the postures of the plurality of vortex generators 22 in accordance with the change in wind direction without providing a dedicated mechanism.

In the above-described fifth embodiment, the plurality of vortex generators 22 are configured by a plate-like member having a thickness in the opening direction of the blowout hole 10, and the blowout hole 10 is opened in the hole forming portion 12. Although the example which is flush with the end face is illustrated, the present invention is not limited to this. That is, even when the plurality of vortex generators 22 are configured by plate-like members, the plate surface may not be flush with the end surface of the hole forming portion 12 where the blowing holes 10 are opened. Good. In addition, the plurality of vortex generators 22 may be arranged side by side in the opening direction of the blowout hole 10 as shown in the fifth modification of FIG. In this case, the plurality of vortex generators 22 may be arranged so as to overlap each other in the opening direction of the blowout hole 10 or may be arranged so as not to overlap each other.

In the fifth embodiment described above, the plurality of vortex generators 22 are illustrated as being formed of a disk-shaped member having a circular shape when viewed from the opening direction of the blowout hole 10, but the present invention is not limited to this. For example, the plurality of vortex generators 22 may be formed of a member whose shape when the plurality of vortex generators 22 are viewed from the opening direction of the blowout hole 10 is an ellipse or a polygon. In addition, the plurality of vortex generators 22 may be configured by a member whose shape viewed from a direction orthogonal to the opening direction of the blowout hole 10 is a circular shape, a conical shape, or a polygonal shape, for example.

For example, the plurality of vortex generators 22 may be composed of spheres 221 as shown in the first modification of FIG. Further, the plurality of vortex generators 22 may be configured by polyhedrons such as an octahedron 222 shown in the second modification of FIG. 42 and a hexahedron 223 shown in the third modification of FIG. 43. Furthermore, the plurality of vortex generators 22 may be configured by a mesh-like body 224 formed in a mesh shape, as shown in the fourth modified example of FIG.

In the above-described fifth embodiment, the vortex generating structure 20 has been described with respect to the example constituted by a plurality of vortex generators 22, but is not limited thereto. The vortex generating structure 20 may be configured to include at least one of the plurality of auxiliary holes 202 and the plurality of uneven portions 204 in addition to the plurality of vortex generators 22.

(Sixth embodiment)
Next, a sixth embodiment will be described with reference to FIG. The air blowing device 1 of the present embodiment is different from the third embodiment in the opening shape of the blowing holes 10. In the present embodiment, portions different from the third embodiment will be mainly described, and description of portions similar to the third embodiment may be omitted.

As shown in FIG. 45, the blowout hole 10 includes a first edge 102 a and a second edge 102 b that constitute a pair of long edges 102, and a third edge 104 a and a second edge that constitute a pair of short edges 104. It consists of four edges 104b.

The first edge portion 102a and the second edge portion 102b are different from each other in the direction of the long axis Ls. In other words, the first edge portion 102a and the second edge portion 102b are curved so that the interval at the central portion in the direction of the long axis Ls is smaller than the interval at both ends in the direction of the long axis Ls.

On the other hand, the third edge portion 104a and the fourth edge portion 104b are curved so that the interval at the central portion in the direction of the short axis Ss is larger than the interval at both ends in the direction of the short axis Ss. The third edge portion 104a and the fourth edge portion 104b are shorter in length along the edge than the first edge portion 102a and the second edge portion 102b, and the first edge portion 102a and the second edge portion 102b. It is opposed at an interval larger than the interval.

The third edge portion 104a is connected to one end of the first edge portion 102a and the second edge portion 102b so that the connection portion between the first edge portion 102a and the second edge portion 102b has a roundness. Similarly, the fourth edge portion 104b is connected to the other ends of the first edge portion 102a and the second edge portion 102b so that the connection portion between the first edge portion 102a and the second edge portion 102b is rounded. Yes.

Although the blowout hole 10 configured as described above has a distorted shape with respect to the oval shape, the connection between the first edge portion 102a and the second edge portion 102b and the third edge portion 104a and the fourth edge portion 104b. The part is rounded. For this reason, the development of the lateral vortex Vt in the vicinity of the outlet downstream of the outlet hole 10 is easily suppressed as compared with the outlet hole 10 including a corner portion.

(Modification of the sixth embodiment)
In the above-described sixth embodiment, the blowout holes 10 that are curved so that the distance between the central portions of the first edge portion 102a and the second edge portion 102b is smaller than the distance between both end portions in the direction of the long axis Ls. Although illustrated, it is not limited to this.

For example, as shown in the first modification of FIG. 46, the first edge portion 102a and the second edge portion 102b of the blowout hole 10 are spaced from each other at both ends in the direction of the long axis Ls. You may curve so that it may become larger than the space | interval in a part.

Further, for example, as shown in the second modification of FIG. 47, the first edge portion 102a and the second edge portion 102b of the blowout hole 10 are spaced apart at one end side in the direction of the long axis Ls. You may curve so that it may become larger than the space | interval in the other end side.

Further, for example, as shown in the third modification of FIG. 48, the blowout hole 10 has the first edge 102a and the second edge 102b because the first edge 102a and the second edge 102b are curved in the same direction. The interval between the edges 102b may be kept constant.

For example, as shown in the fourth modification of FIG. 49, the blowout hole 10 has the first edge portion 102 a and the second edge portion 102 b refracted in the same direction by the first edge portion 102 a and the second edge portion 102 b. The interval between the edges 102b may be kept constant.

Further, for example, as shown in the fifth modified example of FIG. 50, the blowout hole 10 is provided with recesses 102c and 102d that are recessed so as to be away from the first edge 102a and the second edge 102b. May be.

Further, for example, as shown in the sixth modification of FIG. 51, the blowout hole 10 is provided with protrusions 102e and 102f protruding so as to approach the first edge 102a and the second edge 102b. May be.

Here, each of the above-described modified examples exemplifies a part of the opening shape of the blowing hole 10, and a shape other than the above-described shape may be adopted as the opening shape of the blowing hole 10.

Moreover, in 6th Embodiment and its modification, although the vortex generating structure 20 illustrated the opening shape of the blowing hole 10 in the air blowing apparatus 1 comprised with the some auxiliary hole 202, it is not limited to this. The opening shape of the blowout hole 10 shown in the sixth embodiment and its modification can also be applied to the air blowing device 1 in which the vortex generating structure 20 includes a plurality of concavo-convex portions 204 and a plurality of vortex generators 22. .
(Other embodiments)
As mentioned above, although typical embodiment of this indication was described, this indication is not limited to the above-mentioned embodiment, for example, can be variously changed as follows.

In the above-described embodiment, the example in which the auxiliary hole 202 is formed in a circular shape has been described. However, the present invention is not limited to this. For example, the auxiliary hole 202 may have an elliptical shape or a polygonal shape. In addition, as shown in the first modification of the third embodiment, the shape of the auxiliary hole 202 may be formed in a slit shape.

In the above-described embodiment, the opening shape of the blowout hole 10 has been described with respect to an example in which a pair of linear long edge portions 102 and a pair of arcuate short edge portions 104 are continuously formed. It is not limited to this. For example, the opening shape of the blowout hole 10 may be formed by connecting a pair of arc-shaped long edges 102 and a pair of straight short edges 104. Further, as shown in the second modified example of the third embodiment, it may be formed in a rectangular shape including a pair of straight long edges 102 and a pair of straight short edges 104.

In the above-described embodiment, the example in which the shape of the blowout hole 10 is a flat shape has been described. However, the present invention is not limited to this. For example, the opening shape of the blowout hole 10 may be formed in a circular shape, an elliptical shape, or a polygonal shape.

In the above-described embodiment, it is needless to say that elements constituting the embodiment are not necessarily indispensable except for the case where it is clearly indicated that the element is essential and the case where the element is clearly considered to be essential in principle.

In the above-described embodiment, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is particularly limited to a specific number when clearly indicated as essential and in principle. Except in some cases, the number is not limited.

In the above embodiment, when referring to the shape, positional relationship, etc. of the component, etc., the shape, positional relationship, etc. unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to etc.

(Summary)
According to the 1st viewpoint shown by one part or all part of the above-mentioned embodiment, an air blowing apparatus has the duct part which forms the flow path for allowing a working air current to pass through, and the air flow downstream of a duct part. A hole forming part for forming a blowout hole serving as a blowout port for the working airflow is provided. This hole forming portion has a vortex generating structure for generating auxiliary vortices having different vortex characteristics including the rotational direction of the vortex and the direction of the vortex axis from the lateral vortex. This vortex generating structure is formed in the hole forming portion so that the auxiliary vortex collides with the horizontal vortex in a state where at least one of the rotation direction of the vortex and the direction of the vortex axis has a vortex characteristic different from that of the horizontal vortex.

According to the second aspect, the vortex generating structure includes a plurality of auxiliary holes formed side by side along the peripheral edge surrounding the blowout hole, and the airflow blown from the plurality of auxiliary holes causes at least the horizontal vortex to The structure is such that auxiliary vortices with different vortex rotation directions are generated. By causing the auxiliary vortex generated by this structure to collide with the horizontal vortex, the development of the horizontal vortex can be suppressed. Thereby, the drawing-in action of the air drawn into the working airflow blown out from the blowing hole is suppressed, and the working airflow blown out from the blowing hole has a long reach distance.

According to the third aspect, the peripheral portion connects the first edge and the second edge extending opposite to each other at a predetermined interval, and one end of each of the first edge and the second edge. And a fourth edge that connects the other ends of the first edge and the second edge. The first edge portion and the second edge portion constitute a pair of long edge portions that face each other at an interval smaller than the interval between the third edge portion and the fourth edge portion. The third edge and the fourth edge constitute a pair of short edges facing each other at a larger interval than the interval between the first edge and the second edge. The plurality of auxiliary holes are formed on the edge side of the pair of long edge portions so that the plurality of auxiliary vortices are less likely to be generated on the edge side of the pair of short edge portions than the edge side of the pair of long edge portions. It is formed unevenly. According to this, since the collision of the lateral vortex and the auxiliary vortex can be suppressed as compared with the case where the auxiliary hole is formed along the entire peripheral portion of the outlet hole, the lateral vortex and Aerodynamic noise generated by the collision of the auxiliary vortex can be reduced.

According to the fourth aspect, the blowout hole has a flat opening shape, and the peripheral part of the blowout hole includes a pair of long edges and a pair of short edges connected to the pair of long edges, The plurality of auxiliary holes are formed so as to be biased toward the edge sides of the pair of long edge portions. Thereby, compared with the case where an auxiliary hole is formed along the whole peripheral part of a blowing hole, the collision of a horizontal vortex and an auxiliary vortex can be suppressed. As a result, it is possible to reduce the aerodynamic noise caused by the collision of the lateral vortex and the auxiliary vortex while increasing the reach of the working airflow.

According to the fifth aspect, the plurality of auxiliary holes are formed on the edge sides of the pair of long edges and are not formed on the edges of the pair of short edges. Thereby, in the hole formation part, the formation part for forming an auxiliary hole becomes unnecessary on the edge side of a pair of short edge part. As a result, the aerodynamic noise can be reduced and the hole forming portion can be reduced while increasing the reach of the working airflow, and the effect of improving the degree of freedom in installing and mounting the air blowing device can be obtained.

According to the sixth aspect, the vortex generating structure includes a plurality of concave and convex portions formed by alternately arranging concave portions and convex portions along a peripheral edge portion including the blowout holes, and an air current is generated between the concave and convex portions. When passing, the transverse vortex has a structure in which auxiliary vortices having different vortex rotation directions and vortex axis directions are generated. By causing the auxiliary vortex generated by this structure to collide with the lateral vortex that greatly collapses the working airflow, the development of the lateral vortex can be suppressed. Thereby, the drawing-in action of the air drawn into the working airflow blown out from the blowing hole is suppressed, and the working airflow blown out from the blowing hole has a long reach distance.

According to the seventh aspect, the peripheral portion connects the first edge and the second edge extending opposite to each other at a predetermined interval, and one end of each of the first edge and the second edge. And a fourth edge that connects the other ends of the first edge and the second edge. The first edge portion and the second edge portion constitute a pair of long edge portions that face each other at an interval smaller than the interval between the third edge portion and the fourth edge portion. The third edge and the fourth edge constitute a pair of short edges facing each other at a larger interval than the interval between the first edge and the second edge. The plurality of concavo-convex portions are arranged on the edge side of the pair of long edge portions so that the plurality of auxiliary vortices are less likely to be generated on the edge side of the pair of short edge portions than the edge side of the pair of long edge portions. It is formed unevenly. According to this, the collision of the lateral vortex and the auxiliary vortex can be suppressed as compared with the case where the concavo-convex portion is formed along the entire peripheral edge of the blowout hole. Aerodynamic noise generated by the collision of the auxiliary vortex can be reduced.

According to the eighth aspect, the blowout hole has a flat opening shape, and the peripheral portion of the blowout hole includes a pair of long edges and a pair of short edges connected to the pair of long edges, The plurality of uneven portions are formed so as to be biased toward the edge sides of the pair of long edge portions. Thereby, compared with the case where an uneven | corrugated | grooved part is formed along the whole peripheral part of a blowing hole, the collision of a horizontal vortex and an auxiliary vortex can be suppressed. As a result, it is possible to reduce the aerodynamic noise caused by the collision of the lateral vortex and the auxiliary vortex while increasing the reach of the working airflow.

According to the ninth aspect, the plurality of concavo-convex portions are formed on the edge sides of the pair of long edge portions and are not formed on the edge sides of the pair of short edge portions. Thereby, in the hole formation part, the formation part for forming an uneven | corrugated | grooved part becomes unnecessary on the edge side of a pair of short edge part. As a result, the aerodynamic noise can be reduced and the hole forming portion can be reduced while increasing the reach of the working airflow, and the effect of improving the degree of freedom in installing and mounting the air blowing device can be obtained.

According to the 10th viewpoint, the several uneven | corrugated | grooved part is comprised by the plate shape which has thickness in an air flow direction. Thereby, compared with the case where the several uneven | corrugated | grooved part is formed so that it may extend | extend to a flange part, it becomes easy to generate | occur | produce an auxiliary | assistant vortex when an airflow passes between uneven | corrugated | grooved parts. Thereby, the drawing-in action of the air drawn into the working airflow blown out from the blowing hole is suppressed, and the reach distance of the working airflow blown out from the blowing hole becomes long.

According to the eleventh aspect, in the plurality of concave and convex portions, the plate surface on the downstream side in the air flow is flush with the end surface on the downstream side in the air flow of the portion forming the peripheral edge in the hole forming portion. According to this, since the position where the auxiliary vortex is generated by the uneven portion approaches the position where the horizontal vortex starts to occur in the hole forming portion and the auxiliary vortex easily collides with the horizontal vortex, the development of the horizontal vortex is sufficiently suppressed. be able to.

According to the twelfth aspect, the vortex generating structure includes a plurality of vortex generators arranged side by side along the peripheral edge surrounding the blowout hole in the hole forming portion. In the vortex generating structure, when the airflow passes around the vortex generator, the auxiliary vortex is generated in which at least one of the vortex rotation direction and the vortex axis direction is different from the horizontal vortex. By causing the auxiliary vortex generated by this structure to collide with the lateral vortex that greatly collapses the working airflow, the development of the lateral vortex can be suppressed. Thereby, the drawing-in action of the air drawn into the working airflow blown out from the blowing hole is suppressed, and the working airflow blown out from the blowing hole has a long reach distance.

According to the thirteenth aspect, the plurality of vortex generators are supported by the support portion inside the blowout hole so as not to directly contact the peripheral edge portion. Thus, if it is set as the structure which supports a vortex generator with a support part, a vortex generator can be spaced apart from a peripheral part. As a result, an auxiliary vortex can be generated between the vortex generator and the peripheral portion, so that even if a horizontal vortex is generated between the vortex generator and the peripheral portion, the development of the horizontal vortex is suppressed. be able to.

According to the fourteenth aspect, the peripheral portion connects the first edge and the second edge extending opposite to each other at a predetermined interval, and one end of each of the first edge and the second edge. And a fourth edge that connects the other ends of the first edge and the second edge. The first edge portion and the second edge portion constitute a pair of long edge portions that face each other at an interval smaller than the interval between the third edge portion and the fourth edge portion. The third edge and the fourth edge constitute a pair of short edges facing each other at a larger interval than the interval between the first edge and the second edge. The plurality of vortex generators are arranged on the edge side of the pair of long edges so that a plurality of auxiliary vortices are less likely to be generated on the edge side of the pair of short edges compared to the edges of the pair of long edges. It is formed to be biased. According to this, since the collision of the horizontal vortex and the auxiliary vortex can be suppressed as compared with the case where the vortex generator is formed along the entire peripheral edge of the blowout hole, And aerodynamic noise generated by the collision of the auxiliary vortex can be reduced.

According to the fifteenth aspect, the plurality of vortex generators are formed on the edge sides of the pair of long edges and are not formed on the edges of the pair of short edges. According to this, it is possible to suppress a decrease in the opening area of the blowout hole due to the addition of the plurality of vortex generators.

According to the sixteenth aspect, the plurality of vortex generators are constituted by plate-like members having a thickness in the opening direction of the blowout holes. According to this, an auxiliary vortex is easily generated when the airflow passes between the vortex generators. As a result, the auxiliary vortex easily collides with the horizontal vortex, so that the development of the horizontal vortex can be sufficiently suppressed. In addition, an opening direction is a normal line direction of the surface enclosed by the edge part of a blowing hole.

According to the seventeenth aspect, in the plurality of vortex generators, the plate surface on the downstream side of the air flow is flush with the end surface on the downstream side of the air flow of the portion forming the peripheral edge in the hole forming portion. According to this, the position where the auxiliary vortex is generated by the vortex generator is close to the position where the horizontal vortex begins to occur in the hole forming part, and the auxiliary vortex easily collides with the horizontal vortex. can do.

Claims (17)

1. An air blowing device,
   A duct portion (14) that forms a flow path (18) for passing a working air flow blown toward the blow target (2);
   A hole forming portion (12) that forms a blowout hole (10) serving as a blowout port for the working airflow on the air flow downstream side of the duct portion;
   The hole forming section generates a vortex generating structure (20) that generates an auxiliary vortex having a vortex characteristic different from a lateral vortex generated on the downstream side of the outlet of the blowout hole by the working airflow, including a vortex rotation direction and a vortex axis direction. Have
   The vortex generating structure is formed in the hole forming portion so that the auxiliary vortex collides with the horizontal vortex in a state where at least one of the rotational direction of the vortex and the direction of the vortex axis has the vortex characteristic different from the horizontal vortex. Air blowing device.
2. The vortex generating structure includes a plurality of auxiliary holes (202) formed side by side along a peripheral edge (100) surrounding the blowout hole in the hole forming portion, and an air flow blown out from the plurality of auxiliary holes The air blowing device according to claim 1, wherein a plurality of auxiliary vortices are generated in which at least one of a rotation direction of the vortex and a direction of the vortex axis is different from the horizontal vortex.
3. Of the hole forming portion, a peripheral portion surrounding the blowout hole includes a first edge portion (102a) and a second edge portion (102b) extending opposite to each other at a predetermined interval, and the first edge portion and There is a third edge (104a) that connects one end of each of the second edges, and a fourth edge (104b) that connects the other ends of each of the first and second edges. And
   The first edge and the second edge constitute a pair of long edges facing each other at an interval smaller than the interval between the third edge and the fourth edge,
   The third edge and the fourth edge constitute a pair of short edges facing each other at a larger interval than the interval between the first edge and the second edge,
   The plurality of auxiliary holes generate a plurality of auxiliary vortices on the edge side of the pair of short edge portions compared to the edge side of the pair of long edge portions in the peripheral edge portion surrounding the blowout hole in the hole forming portion. The air blowing device according to claim 2, wherein the air blowing device is formed so as to be biased toward an edge side of the pair of long edge portions so as to be difficult to perform.
4. The blowing hole has a flat opening shape,
   Of the hole forming portion, a peripheral portion surrounding the blowout hole is a pair of long edge portions (102) facing the short axis direction of the blowout hole and facing the long axis direction, A pair of short edges (104) that are continuous with the long edges and are shorter than the pair of long edges,
   The plurality of auxiliary holes generate a plurality of auxiliary vortices on the edge side of the pair of short edge portions compared to the edge side of the pair of long edge portions in the peripheral edge portion surrounding the blowout hole in the hole forming portion. The air blowing device according to claim 2, wherein the air blowing device is formed so as to be biased toward an edge side of the pair of long edge portions so as to be difficult to perform.
5. The air blowing device according to claim 3 or 4, wherein the plurality of auxiliary holes are formed on an edge side of the pair of long edge portions and are not formed on an edge side of the pair of short edge portions.
6. The vortex generating structure includes a plurality of concave and convex portions (204) formed by alternately arranging concave portions (206) and convex portions (208) along a peripheral portion surrounding the blowing hole in the hole forming portion. The auxiliary vortex is generated in which at least one of the rotation direction of the vortex and the direction of the vortex axis is different from the transverse vortex when the airflow passes between the uneven portions. The air blowing device described in 1.
7. Of the hole forming portion, a peripheral portion surrounding the blowout hole includes a first edge portion (102a) and a second edge portion (102b) extending opposite to each other at a predetermined interval, and the first edge portion and There is a third edge (104a) that connects one end of each of the second edges, and a fourth edge (104b) that connects the other ends of each of the first and second edges. And
   The first edge and the second edge constitute a pair of long edges facing each other at an interval smaller than the interval between the third edge and the fourth edge,
   The third edge and the fourth edge constitute a pair of short edges facing each other at a larger interval than the interval between the first edge and the second edge,
   The plurality of concavo-convex portions generate a plurality of auxiliary vortices on the edge side of the pair of short edge portions, compared to the edge side of the pair of long edge portions, in the peripheral portion surrounding the blowing hole in the hole forming portion. The air blowing device according to claim 6, wherein the air blowing device is formed so as to be biased toward an edge side of the pair of long edge portions so as to be difficult to perform.
8. The blowing hole has a flat opening shape,
   Of the hole forming portion, a peripheral portion surrounding the blowout hole is a pair of long edge portions (102) facing the short axis direction of the blowout hole and facing the long axis direction, A pair of short edges (104) that are continuous with the long edges and are shorter than the pair of long edges,
   The plurality of concavo-convex portions generate a plurality of auxiliary vortices on the edge side of the pair of short edge portions, compared to the edge side of the pair of long edge portions, in the peripheral portion surrounding the blowing hole in the hole forming portion. The air blowing device according to claim 6, wherein the air blowing device is formed so as to be biased toward an edge side of the pair of long edge portions so as to be difficult to perform.
9. The air blowing device according to claim 7 or 8, wherein the plurality of concave and convex portions are formed on the pair of long edge portions and are not formed on the pair of short edge portions.
10. 10. The air blowing device according to claim 6, wherein the plurality of concave and convex portions protrude toward the inside of the blowing hole and are formed in a plate shape.
11. 11. The plurality of concave and convex portions have a plate surface on the downstream side of the air flow that is flush with an end surface on the downstream side of the air flow in a portion of the hole forming portion that forms a peripheral portion surrounding the blowout hole. The air blowing device described in 1.
12. An air blowing device,
    A duct portion (14) that forms a flow path (18) for passing a working air flow blown toward the blow target (2);
    A hole forming portion (12) for forming a blowout hole (10) serving as a blowout port for the working airflow on the air flow downstream side of the duct portion;
    A vortex generating structure (20) for generating auxiliary vortices having different vortex characteristics including the rotational direction of the vortex and the direction of the vortex axis from the lateral vortex generated on the outlet downstream side of the outlet hole by the working airflow;
    The vortex generating structure includes a plurality of vortex generators (22) arranged side by side along a peripheral edge portion (100) surrounding the blowout hole in the hole forming portion, and an air current is generated around the vortex generator. An air blowing device having a structure in which, when passing, at least one of a rotating direction of a vortex and a direction of a vortex axis generates the auxiliary vortex different from the horizontal vortex.
13. The plurality of vortex generators are supported by support portions (23, 24) on the inner side of the blowout hole so as not to directly contact a peripheral portion surrounding the blowout hole in the hole forming portion. Item 13. The air blowing device according to Item 12.
14. Of the hole forming portion, a peripheral portion surrounding the blowout hole includes a first edge portion (102a) and a second edge portion (102b) extending opposite to each other at a predetermined interval, and the first edge portion and There is a third edge (104a) that connects one end of each of the second edges, and a fourth edge (104b) that connects the other ends of each of the first and second edges. And
    The first edge and the second edge constitute a pair of long edges facing each other at an interval smaller than the interval between the third edge and the fourth edge,
    The third edge and the fourth edge constitute a pair of short edges facing each other at a larger interval than the interval between the first edge and the second edge,
    The plurality of vortex generators includes a plurality of auxiliary vortices on an edge side of the pair of short edges compared to an edge side of the pair of long edges in a peripheral edge surrounding the outlet hole in the hole forming portion. The air blowing device according to claim 12 or 13, wherein the air blowing device is formed so as to be biased toward an edge side of the pair of long edge portions so as not to be generated.
15. The air blowing device according to claim 14, wherein the plurality of vortex generators are formed on an edge side of the pair of long edge portions and are not formed on an edge side of the pair of short edge portions.
16. The air blowing device according to any one of claims 12 to 15, wherein the plurality of vortex generators are configured by a plate-like member having a thickness in an opening direction of the blowing hole.
17. The plurality of vortex generators have a plate surface on the downstream side of the air flow that is flush with an end surface on the downstream side of the air flow in a portion of the hole forming portion that forms a peripheral portion surrounding the blowout hole. 16. The air blowing device according to 16.

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