JP7722766B1 - Air blower and clothing with air blower - Google Patents

Abstract

The air blower (1) includes a blade (61) that rotates to blow air, and a guard (3) that covers the blade on the downwind side of the air blowing and is formed to allow ventilation in the circumferential direction around the rotation axis of the blade. The guard has one or more airflow direction adjusting members (50) each consisting of a laminar flow introduction section (51) including a first side parallel to the rotation axis of the blade, and an airflow direction changing section (56) including a second side bent radially outward around the rotation axis and connected to the first side. The airflow direction adjusting member is adjacent to a gap (4) that serves as a flow path for the air in the radial direction, and is positioned so that the first side and the second side are in contact with the flow path for the air. Air is supplied through the guard.

Description

The present disclosure relates to a blower that uses rotation of blades to blow air toward, for example, the body, etc. The present disclosure also relates to clothing with such a blower attached to fabric.

In recent years, there have been many extremely hot days throughout the year that are uncomfortable for people. On such days, people are encouraged to drink plenty of fluids and use air conditioners appropriately to prevent heatstroke.

However, due to reasons such as the lack of air conditioning equipment or insufficient cooling, workers working outdoors in extreme heat, workers working in humid indoor environments, and people enjoying recreation, sports, or watching games under the scorching sun cannot cool down with air conditioning.

Therefore, in recent years, many clothes with air conditioning functions have been developed for people seeking to escape the summer heat. One example of such clothes is disclosed in Patent Document 1.

Patent Document 1 discloses air-conditioned clothing with an air-blowing unit attached to the fabric of the clothing. The air-conditioned clothing air-blowing unit includes a propeller that blows air and a casing that surrounds the propeller to allow ventilation. The casing includes an inner case located on the downwind side of the propeller. The inner case serves as a guard with gaps intermittently provided at multiple locations. The side of the guard is formed along the rotation axis of the propeller.

In Patent Document 1, a main body casing is inserted into an opening in the air-conditioned clothing from the outside of the clothing, and a flange of the main body is abutted against the outer periphery of the opening. A pressure member is attached from the inside of the clothing toward the main body casing. The air-conditioning clothing blowing unit is attached by fastening the main body and the pressure member together, sandwiching the clothing between the flange of the main body and the pressure member. As the propeller rotates, air passes through the gaps between adjacent guards and is blown toward the body inside the clothing.

Utility Model Registration No. 3213564

However, when the air-conditioning clothing air-blowing unit of Patent Document 1 is attached to the clothing to blow air toward the body, the distance from the fabric of the clothing to which the air-blowing unit is attached to the body behind it is only a few centimeters, and the tip of the inner case is in contact with or close to the body. On the other hand, in an air-blowing device that blows air by rotating a propeller, as in Patent Document 1, the air is generally blown from the propeller in a linear manner along the axial direction of the propeller, in a generally laminar flow.

As a result, most of the air sent from the propeller passes between the guards of the inner case, and only hits the area of the body that faces the propeller. Furthermore, the air drifting in the internal space between the clothing and the body, especially near the tip of the inner case, is adversely affected by the flow of air sent from the propeller and the air that changes direction after hitting the area of contact with the body, creating vortices and creating turbulence. Therefore, the air sent from the propeller stagnates around the inner case, preventing it from reaching a wider area within the space between the clothing and the body.

Therefore, in a blower device that blows air by rotating blades, as in Patent Document 1, there is a problem in that the user cannot receive the air blown from the blades over a wider area of the body through the gaps between the guards on the leeward side of the blades.

The present disclosure has been made to solve the above-mentioned problems, and aims to provide a blower device that can control the wind direction by rotating the blades so that the wind sent out circulates over a wider area on the downwind side of the blades, and clothing with a blower device that can improve comfort for the user by wearing this blower device.

(1) A blower device according to one aspect of the present disclosure, which has been made to solve the above-mentioned problems, includes blades that rotate to blow air, and a guard that covers the blades on the downwind side of the blown air and is formed to be breathable, and the air is supplied through the guard. The guard has one or more air direction adjusting members, and the air direction adjusting members are connected to a laminar flow introduction section that includes a first side that is parallel to the rotation axis of the blade, and an air direction changing section that includes a second side that bends radially outward around the rotation axis and connects to the first side, and in the guard, the air direction adjusting members are adjacent to a gap that forms a flow path for the air in the radial direction, and the first side and the second side are positioned so that they contact the flow path for the air.

According to this aspect, the directionality of the wind blown out from the guard is expanded compared to the conventional blower device disclosed in Patent Document 1, etc., and the wind blows out from the guard over a wider area in addition to flowing downwind along the direction of the rotation axis.

Furthermore, the air sent out from the blades does not stagnate around the guards, but flows through the gaps in the guards in a widely dispersed airflow area around the rotation axis, and around the air blower of the present disclosure. In addition, because the air sent out from the blades is distributed widely around the area around the air blower of the present disclosure, the user can receive the air supplied from the air blower not only in the central area facing the blades, but also in surrounding areas away from the central area.

(2) In the aspect described in (1) above, it is preferable that the multiple airflow direction adjustment members are arranged concentrically around the center of the rotation axis and intermittently overlap each other with the gap between them in the radial direction.

According to this aspect, the wind blown out by the rotation of the blades includes a flow along the direction of the rotation axis due to the wind direction adjustment member, and also has a flow that is sufficiently expanded in the radial direction perpendicular to the rotation axis, so that it is diffused over a wide air blowing area through the gaps in the guard.

(3) In the aspect described in (2) above, it is preferable that, for the multiple wind direction adjustment members, the angle of the second side relative to the first side increases from the radially inner side toward the radially outer side for each wind direction adjustment member.

According to this aspect, the wind blown out by the rotation of the blades includes a flow along the direction of the rotation axis due to the wind direction adjustment member, and also has a flow that is sufficiently expanded in the radial direction perpendicular to the rotation axis, so that it diffuses into a wider air blowing area through the gaps in the guard.

(4) In any one of the aspects (1) to (3) above, it is preferable that the distance between the leeward portion of the blade that is located furthest downwind and the wind-inlet end face of the laminar flow introduction portion of the wind direction adjustment member that is located furthest upwind is at most 10 mm or less.

According to this aspect, the wind sent downwind by the rotation of the blades includes a flow along the direction of the rotation axis, and the wind direction adjustment member allows the wind to be blown out in a radial direction perpendicular to the rotation axis, with a flow that is sufficiently spread out, for example, an angle of 100 to 160 (deg), as an example of the angle formed by the air blowing area STw shown in Figure 13, so that the wind is diffused from the guard into a wide air blowing area.

(5) In the aspect described in any one of (1) to (4) above, it is preferable that the wind direction adjustment member has an airflow inlet end face located most upwind of the laminar flow introduction section and the first side face connected via an R-shaped curved surface.

According to this aspect, when the wind trying to flow into the gap approaches the first side, the pressure loss of the airflow is reduced, the curved surface suppresses the generation of vortices, and the wind flows toward the second side.

(6) In the aspect described in any one of (1) to (5) above, it is preferable that the first side and the second side of the airflow direction adjustment member are connected via an R-shaped curved surface.

According to this aspect, when the wind that has flowed into the gap flows from the first side toward the second side, the pressure loss of the airflow is reduced as it approaches the second side and passes through the gap, and the generation of vortices is suppressed at the curved surface, allowing the wind to be supplied to the outside.

(7) In the aspect described in any one of (1) to (6) above, it is preferable that a drive unit is provided for rotating the blades, and the guard is formed on the outer periphery of the drive unit located at the center in the radial direction.

According to this aspect, the drive unit is located in a portion of the blower device that does not blow out air using the blades, so the entire blower device can be made compact.

(8) In addition, in another aspect of the present disclosure, clothing with an air blower, which has been made to solve the above problem, is characterized in that a fan unit that blows air is attached to the fabric of the clothing, and the fan unit is an air blower described in any one of (1) to (5) above.

According to this aspect, the clothing with a blower can be used by people who particularly need cool air, such as workers who work outdoors in extreme heat, workers who work in humid indoor environments while wearing work clothes, and people who engage in recreational activities, sports, or watching events under the blazing sun. Clothing with a blower improves comfort for the wearer compared to clothing with a blower according to the prior art.

Therefore, the air blower according to the present disclosure has the excellent effect of being able to control the direction of the air blown by the rotation of the blades so that the air flows over a wider area on the downwind side of the blades.Furthermore, the clothing with an air blower according to the present disclosure has the excellent effect of improving comfort for the user.

1 is a side view showing a blower device according to an embodiment. FIG. 2 is a plan view of the blower device shown in FIG. 1 as viewed from the intake side. FIG. 2 is a plan view of the blower device shown in FIG. 1 as viewed from the blowing side. FIG. 2 is a perspective view of the blower device shown in FIG. 1 as viewed from the blowing side. FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3, showing a part of the side view. FIG. 2 is an exploded perspective view of the blower device shown in FIG. 1 . 4 is an explanatory diagram showing a plan view of a fixed guide formed in the blower device according to the embodiment; FIG. This is an explanatory diagram showing the state in which the protrusion is engaged with the fixed guide in the blower device of the embodiment, and shows the case of fixed position A where the flange of the intake side case part and the flange of the blower side case part are furthest apart. Similar to Figure 8, this is an explanatory diagram showing the state in which the protrusion is engaged with the fixed guide, and shows the case of fixed position B where the flange of the intake side case part and the flange of the blower side case part are closest to each other. Similar to Figures 8 and 9, this is an explanatory diagram showing the state in which the protrusion is engaged with the fixed guide, and shows the case of fixed position C in which the flange of the intake side case part and the flange of the blower side case part are spaced apart at a position intermediate between fixed positions A and B. FIG. 6 is a diagram showing a main part of FIG. 5 . 4 is a cross-sectional view of an airflow direction adjusting member formed in the air blower according to the embodiment; FIG. 5 is a schematic diagram showing the flow of air through a guard when air is blown by the blower device according to the embodiment. FIG. 10 is a schematic diagram showing the flow of air through a guard when air is blown by a blower according to a comparative example. FIG. 1 is an explanatory diagram illustrating a schematic view of clothing with a blower according to an embodiment. 1 is a schematic side view showing how to attach the air blower according to the embodiment to the fabric of clothing with an air blower. FIG. 1 is a schematic perspective view showing how to attach an air blower according to an embodiment to the fabric of clothing with an air blower; FIG. This is a cross-sectional view taken along the line BB in FIG. 15, and is a schematic diagram showing the flow of air blowing out through the guard in the space between the clothing and the body.

The following describes in detail an embodiment of an air blower and clothing with an air blower according to the present disclosure. The air blower according to the present disclosure is a fan unit that rotates blades to supply air toward, for example, the body through a guard. Body temperature regulating clothing according to the present disclosure is configured by attaching an air blower according to the present disclosure to the fabric as a fan unit that blows air, and is capable of blowing air toward the body by this air blower.

First, the configuration of the air blower 1 will be described. Fig. 1 is a side view showing an air blower according to an embodiment. Fig. 2 is a plan view of the air blower shown in Fig. 1 as seen from the intake side, and Fig. 3 shows a plan view as seen from the air blowing side. Fig. 4 is a perspective view of the air blower shown in Fig. 1 as seen from the air blowing side. Fig. 5 is a cross-sectional view taken along the line A-A in Fig. 3, showing a portion as seen from the side. Fig. 6 is an exploded perspective view of the air blower shown in Fig. 1.

In the blower 1 according to this embodiment, the vertical direction in Fig. 1 is defined as the axial direction AX along the axis C, and in Fig. 2, the direction perpendicular to the axial direction AX is defined as the radial direction RD, and the circumferential direction around the axis C along the axial direction AX is defined as the circumferential direction CR, and the directions defined in Fig. 1 and Fig. 2 are also used in Fig. 3 and subsequent figures. In addition, the power supply, electrical wiring, connectors, etc. necessary for the blower 1 are not shown in the figures.

As shown in FIGS. 1 to 6, the blower 1 includes a case body 2, a blade body 60, a drive unit 70, and the like.

<About the Wing Body 60 and the Drive Unit 70>
5 and 6, the blade body 60 is composed of a boss portion 62 and blades 61. The blade body 60 is a propeller fan that can be rotated around a rotation shaft 71 disposed on the axis C by a drive unit 70 that includes the rotation shaft 71, its bearing, an electric motor, etc. The blade body 60 and the drive unit 70 are housed in the case internal space 30S.

A power supply connection section 72 is provided in the blower-side case section 30. The power supply connection section 72 is formed so as to be detachable from a power supply-side connection member (not shown), such as a plug, that electrically connects to a power source, and the drive section 70 is energized via the power source by electrical conduction between the power supply-side connection member and the power supply connection section 72.

In this embodiment, nine blades 61 are connected to the boss portion 62. The number of blades 61 connected to the boss portion 62 is not limited to nine, and may be, for example, five, seven, or an odd number greater than nine. This is because when the blade body is made up of an odd number of blades, vibrations that occur when the blades rotate are reduced compared to when an even number of blades are used.

Furthermore, when the number of blades 61 is increased from 5 to, for example, 7 or 9, the twist angle of each blade 61 connecting to the boss portion 62 inevitably becomes larger compared to when the number is 5. When the twist angle of the blade 61 becomes larger, the air is sent out from almost the entire surface area of the blade 61, making it easier to make the air pressure distribution on the surface of the blade 61 more uniform, and also reducing noise during air blowing.

Furthermore, when the number of blades 61 is 7 or 9, the distance between adjacent blades 61 is smaller than when there are 5. Therefore, it is possible to minimize interruptions in the airflow continuously blown out from each blade 61, even if only slightly, and the wind becomes a smooth airflow with controlled strength, and is blown out in a manner that feels gentle on the skin of the person receiving the wind.

<Regarding the intake side case portion 10>
The case body 2 is composed of an intake side case portion 10 and a blower side case portion 30. The intake side case portion 10 has an intake side flange 11, an intake side peripheral wall portion 12, an intake portion 13, and the like.

The intake side flange 11 is formed in an annular shape, and the inner circumferential side of this intake side flange 11 forms the intake section 13. The intake section 13 has an intake port 14 that takes in air AR into the case main body 2. In this embodiment, as shown in Figures 1 and 5, the intake section 13 is formed in a shape that gently rises from the inner circumferential side of the intake side flange 11 toward the center passing through the axis C, with a height difference M of, for example, about 3 mm.

However, it is preferable that the height difference M of the intake section 13 is closer to 0 mm. As will be described later, when the air blower 1 is attached to clothing, if the height difference M of the intake section is, for example, 10 mm or more, the intake section of the air blower device is likely to come into contact with obstacles or the like present in the vicinity.

In addition, the movement of the wearer of this clothing is affected by the protrusion of the intake section of the air blower. For this reason, if the intake section 13 of the intake side case 10 has a flatter shape, it becomes easier to avoid contact with surrounding obstacles, etc., and it is possible to reduce adverse effects on the movement of the wearer of the clothing.

The intake-side peripheral wall portion 12 is integral with the intake-side flange 11 and stands cylindrically from the radially inner peripheral edge of the intake-side flange 11. As shown in Figures 5 and 6, the outer peripheral surface 12a of the intake-side peripheral wall portion 12 is provided with protrusions 20 in a distributed arrangement at multiple locations in the circumferential direction and the axial direction AX.

<About the blower-side case portion 30>
1 and 3 to 6, the air-blowing-side case 30 includes a guard 3, an air-blowing-side flange 31, an air-blowing-side peripheral wall 32, and a case internal space 30S surrounded by the air-blowing-side peripheral wall 32. The air-blowing-side flange 31 is formed in an annular shape. The air-blowing-side peripheral wall 32 is integral with the air-blowing-side flange 31 and extends cylindrically from the inner periphery of the air-blowing-side flange 31.

The outer peripheral surface 32a of the blower-side peripheral wall 32 has a grip portion 33 formed around the entire circumference in the circumferential direction CR, with concave and convex portions alternately repeating. This allows the user of the blower device 1 to firmly grasp the grip portion 33 with their fingers without slipping when manually rotating the blower-side case 30 relative to the intake-side case 10 around the axis C. This makes it easy for the user to rotate the blower-side case 30 with their fingers.

<Assembling the Intake Side Case 10 and the Air Blower Side Case 30>
7 is a plan view of a fixed guide formed in the blower according to the embodiment. As shown in FIGS. 6 and 7, a plurality of fixed guides 40 are disposed on the inner peripheral surface 32b of the blower-side peripheral wall 32. The diameter of the inner peripheral surface 32b of the blower-side peripheral wall 32 is larger than the outer diameter of the protrusions 20 provided on the outer peripheral surface 12a of the intake-side peripheral wall 12, allowing the protrusions 20 and the fixed guides 40 to engage with each other.

7 , when viewed from the axial direction AX, the fixed guide 40 extends between one end 41 a and the other end 40 b in an arc shape that follows the inner circumferential surface 32 b of the blower-side peripheral wall portion 32, and when viewed from the radial direction RD, is inclined at an angle Φ from the horizontal. In the fixed guide 40, the one end 41 a and the other end 40 b have a height difference H in the axial direction AX. The multiple fixed guides 40 are spaced apart in the axial direction AX at a predetermined pitch that matches the dimensions of the protrusions 20 and are arranged in an intermittent manner.

The fixed guide 40 has a stopper 44 at the other end 40b on the sliding side of the protrusion piece 20 formed on the outer peripheral surface 12a of the intake side peripheral wall portion 12, and in the lead direction Le, from one end 41a side, via the introduction surface 41, the first regulating surface 43a, the first holding surface 42a, the second regulating surface 43b, the second holding surface 42b, the third regulating surface 43c, the third holding surface 42c, the fourth regulating surface 43d, the fourth holding surface 42d, the fifth regulating surface 43e, and the fifth holding surface 42e, in that order.

The first holding surface 42a, the second holding surface 42b, the third holding surface 42c, the fourth holding surface 42d, and the fifth holding surface 42e are formed in a smooth surface shape and serve as surfaces for holding the protruding piece 20. The first restricting surface 43a, the second restricting surface 43b, the third restricting surface 43c, the fourth restricting surface 43d, and the fifth restricting surface 43e are formed in a mountain shape protruding from the first holding surface 42a, the second retaining surface 42b, the third retaining surface 42c, the fourth retaining surface 42d, and the fifth retaining surface 42e.

The first restricting surface 43 a, the second restricting surface 43 b, the third restricting surface 43 c, the fourth restricting surface 43 d, and the fifth restricting surface 43 e and the stopper 44 restrict movement of the protrusion 20 arranged on the holding surface such as the first holding surface 42 a in the lead direction Le from both sides of the protrusion 20. In addition, the movement of the protrusion 20 arranged on the holding surface such as the first holding surface 42 a is restricted in the axial direction AX by contact with the adjacent fixed guide 40.

In the blower device 1, the intake-side peripheral wall 12 of the intake-side case 10 is inserted into the case internal space 30S of the blower-side case 30, and while the intake-side case 10 and the blower-side case 30 rotate relatively around the axis C, the protrusions 20 of the intake-side case 10 and the fixed guides 40 of the blower-side case 30 are engaged and positioned. In this way, the intake-side case 10 and the blower-side case 30 are assembled.

In the blower device 1, the axial separation distance AX between the intake side flange 11 of the intake side case portion 10 and the blower side flange 31 of the blower side case portion 30 changes depending on the position of the holding surface that holds the protrusion piece 20, among the first holding surface 42a, second holding surface 42b, third holding surface 42c, fourth holding surface 42d, and fifth holding surface 42e on the fixed guide 40.

Figure 8 is an explanatory diagram showing the state in which the protrusion is engaged with the fixed guide in the blower device of the embodiment, and shows the case of fixed position A, where the flange of the intake side case part and the flange of the blower side case part are furthest apart.

As an example, as shown in Figure 8, when the protrusion piece 20 sliding from the introduction surface 41 is positioned by the fixed guide 40 and the first retaining surface 42a located between the first regulating surface 43a and the second regulating surface 43b, the intake side flange 11 and the blowing side flange 31 are at fixed position A, where they are separated by the largest flange-to-flange distance K1.

Like Figure 8, Figure 9 is an explanatory diagram showing the state in which the protrusion is engaged with the fixed guide, and shows the case of fixed position B, where the flange of the intake side case part and the flange of the blower side case part are closest to each other.

Also, as shown in Figure 9, when the protrusion piece 20 is positioned by the fixed guide 40 and the fifth retaining surface 42e located between the fifth regulating surface 43e and the stopper 44, the intake side flange 11 and the blowing side flange 31 are spaced apart at the smallest flange-to-flange distance K5 (K5 < K1) to form a fixed position B.

Figure 10, like Figures 8 and 9, is an explanatory diagram showing the state in which the protrusion is engaged with the fixed guide, and shows the case in which the flange of the intake side case part and the flange of the blower side case part are spaced apart at a fixed position C intermediate between fixed positions A and B.

Also, as shown in Figure 10, when the protrusion piece 20 is positioned by the fixed guide 40 and the third retaining surface 42c located between the third regulating surface 43c and the fourth regulating surface 43d, the intake side flange 11 and the blowing side flange 31 are at fixed position C, separated by a flange-to-flange distance K3 (K5 < K3 < K1) which is between the flange-to-flange distance K1 and the flange-to-flange distance K5.

In this way, the air blower 1 can change the axial distance AX between the intake-side flange 11 of the intake-side case 10 and the air blowing-side flange 31 of the air blowing-side case 30. Therefore, when the air blower 1 is attached by sandwiching the peripheral portion 103 of the fabric 101 between the intake-side flange 11 and the air blowing-side flange 31, as in the case of clothing with an air blower 100 described below, the thickness of the gripped portion, such as the peripheral portion 103, that can be sandwiched can accommodate a wide range of thicknesses.

As shown in Figure 6, the blower device 1 of this embodiment is configured in such a manner that the protrusion piece 20 is provided on the outer peripheral surface 12a of the intake side peripheral wall portion 12 of the intake side case portion 10, and the fixed guide 40 is provided on the inner peripheral surface 32b of the blower side peripheral wall portion 32.

However, the blower device may also be configured in a structure in which a protrusion such as protrusion 20 is provided on the outer peripheral surface of the blower side peripheral wall portion, and a fixed guide such as fixed guide 40 is provided on the outer peripheral surface of the intake side peripheral wall portion of the intake side case portion.

Furthermore, the blower device 1 according to this embodiment is structured so that the intake side case portion 10 and the blower side case portion 30 are positioned and assembled by the engagement between the protruding pieces 20 and the fixed guides 40 .

However, the blower device may also be configured in a structure in which the intake side case part and the blower side case part are fixed and assembled, for example, by screwing, fitting, or fastening the screws between the intake side case part and the blower side case part, and the means for fixing the intake side case part and the blower side case part is not particularly limited and can be modified in various ways.

In addition, the blower device 1 of this embodiment is structured so that the intake side peripheral wall portion 12 of the intake side case portion 10 is inserted inside the blower side peripheral wall portion 32 of the blower side case portion 30, thereby assembling the intake side case portion 10 and the blower side case portion 30.

However, in the blower device 1, the blower device according to the present disclosure may be configured so that the blower side wall portion of the blower side case portion is inserted inside the intake side wall portion of the intake side case portion, and the intake side case portion and the blower side case portion are assembled together, so that the insertion side member is on the blower side wall portion 32 side.

<About Guard 3>
4 to 6, the guard 3 is formed on the outer periphery of the drive unit 70, which is located at the center in the radial direction RD and on the opposite side of the blowing-side flange 31 in the axial direction AX. The guard 3 covers the blades 61 that blow air by rotation and the leeward side Fd of the blown air, and allows ventilation through the gap 4. The guard 3 is formed in a manner that covers the case internal space 30S surrounded by the blowing-side peripheral wall 32 from the inner periphery of the blowing-side peripheral wall 32 toward the center passing through the axis C. The air blown out from the blades 61 passes through the guard 3 and is supplied to the outside.

Fig. 11 is a diagram showing the main part of Fig. 5. Fig. 12 is a diagram showing a cross section of an airflow direction adjusting member formed in the air blower according to the embodiment.

The guard 3 has one or more airflow direction adjusting members 50, and in this embodiment, as shown in Figures 3 to 12, three airflow direction adjusting members 50A, 50B, 50C (50) are formed on the guard 3.

11 and 12, each of the three airflow direction adjustment members 50A, 50B, 50C (50) comprises a laminar flow introduction section 51 and an airflow direction changing section 56. The laminar flow introduction section 51 is a plate-shaped section including a first side surface 52 (52A, 52B) that is arranged parallel to the rotation axis 71 of the blade body 60, i.e., along the axial direction AX.

11 and 12, the airflow direction changing section 56 is formed in a manner that it is integrally connected to the laminar flow introduction section 51. The airflow direction changing section 56 is a plate-shaped portion that includes second side surfaces 57 (57A, 57B) that are bent from the first side surfaces 52 (52A, 52B) toward the outside in the radial direction RD (to the right in the left-right direction in FIG. 11) about the axis C.

In the guard 3, all three airflow direction adjustment members 50A, 50B, 50C (50) are arranged in an arc shape in the circumferential direction CR centered on the axis C. The three airflow direction adjustment members 50A, 50B, 50C (50) are arranged concentrically about the axis C and intermittently overlap with gaps 4 in between in the radial direction RD.

11 and 12, each of the airflow direction adjustment members 50A, 50B, 50C (50) is adjacent to the gap 4 that forms the airflow path FL in the radial direction RD. In each of the airflow direction adjustment members 50A, 50B, 50C (50), the first side surface 52 and the second side surface 57 are disposed in positions that contact the airflow path FL.

Furthermore, in the three airflow direction adjustment members 50A, 50B, 50C (50), as shown in Figures 11 and 12, the bending angle θ, which is the angle of the second side 57 relative to the first side 52, increases from the inner side in the radial direction RD (left side in the left-right direction in Figure 11) to the outer side in the radial direction RD (right side in the left-right direction in Figure 11) for each airflow direction adjustment member 50.

Specifically, when there are three airflow direction adjustment members 50 on the guard 3, as shown in Figures 11 and 12, the bending angle θ1 (deg) of the first airflow direction adjustment member 50A (50) located closest to the axis C is, for example, 0≦θ1≦50, and in this embodiment, the bending angle θ1 = 45 (deg).

Furthermore, the bending angle θ2 (deg) of the second airflow direction adjustment member 50B (50) adjacent to the first airflow direction adjustment member 50A is, for example, 0≦θ2≦70, and in this embodiment, the bending angle θ2=60 (deg). Furthermore, the bending angle θ3 (deg) of the third airflow direction adjustment member 50C (50) disposed at the position furthest from the axis C is, for example, 0≦θ3≦90, and in this embodiment, the bending angle θ3=75 (deg).

In addition, the bending angles θ1 = 45 (deg), θ2 = 60 (deg), and θ3 = 75 (deg) set by the three airflow direction adjustment members 50A, 50B, 50C (50) are not limited to any particular value and can be changed as appropriate.

Here, the number of airflow direction adjustment members 50 is defined as n (0<n). When there are multiple airflow direction adjustment members 50, as shown in Figures 11 and 12, the airflow direction adjustment member 50 located closest to the axis C is defined as the first airflow direction adjustment member 50, with x = 1. Furthermore, the airflow direction adjustment member 50 located farthest from the axis C is defined as x = n, with x = n representing the nth airflow direction adjustment member 50. The magnitude of the bending angle θ (deg) of the airflow direction adjustment member 50 is defined as y (0≦y≦90), where y is a linear function of the variable x. Note that a (0<a) is a coefficient, and b (0≦b≦90) is a constant representing the angle (deg).

Based on these assumptions, the bending angle θ of the airflow direction adjusting member 50 is set by the following equation (1).
y=a*x+b...Formula (1)

In other words, regardless of the number of wind direction adjustment members 50 arranged on the guard 3, the bending angle θ of the second side surface 57 relative to the first side surface 52 of the wind direction adjustment member 50 needs to satisfy the condition 0≦θ≦90 (deg), as shown in equation (1), and the second side surface 57 needs to be bent relative to and connected to the first side surface 52 in accordance with the direction in which the air blown from the blades 61 flows.

In addition, the wind direction adjustment member may be configured so that a rotation mechanism is provided between the laminar flow introduction section and the wind direction changing section, and the wind direction changing section rotates relative to the laminar flow introduction section, thereby allowing the magnitude of the bending angle θ of the second side surface that forms with the first side surface to be freely changed.

In all three airflow direction adjustment members 50A, 50B, 50C (50), as shown in Figures 11 and 12, the airflow inlet end face 53, which is located most windward in the laminar flow introduction section 51, is connected to the first side face 52 (52A, 52B) via an R-shaped inlet curved surface 54.

The radius of curvature of the inlet-side curved surface 54 is a ratio of the distance (thickness) between the opposing first side surfaces 52A and 52B in Fig. 12, and is, for example, a size equivalent to 10 to 50%. In this embodiment, the radius of curvature of the inlet-side curved surface 54 is approximately 30% of the thickness between the first side surfaces 52A and 52B.

The airflow inlet side end face 53 and the first side face 52A, and the airflow inlet side end face 53 and the first side face 52B may be connected by a C-chamfered surface.

Furthermore, in the three airflow direction adjustment members 50A, 50B, 50C (50), the first side 52A (52) and the second side 57A (57), which are located on the outer side in the radial direction RD (right side in the left-right direction in Figure 12), are connected via an R-shaped bent side curved surface 58.

The radius of curvature of bent-side curved surface 58 is a ratio of the distance (thickness) between opposing second side surfaces 57A and 57B in Fig. 12, and is, for example, a size equivalent to 50 to 90%. In this embodiment, the radius of curvature of bent-side curved surface 58 is approximately 80% of the thickness between second side surfaces 57A and 57B.

The first side surface 52A and the second side surface 57A may be connected by a flat surface.

<Regarding the positional relationship between the airflow direction adjustment member 50 and the blades 61>
11 , in the blower 1, the three airflow direction adjustment members 50A, 50B, 50C (50) are arranged on the downwind side Fd of the blade 61 of the blade main body 60. In the axial direction AX, the distance between the blade downwind portion 61X of the blade 61, which is located on the downwind side Fd, and the wind inlet side end face 53 of the laminar flow introduction portion 51 of the airflow direction adjustment member 50, which is located on the windward side Fw, is at most 10 mm or less.

Specifically, in the case of the first airflow direction adjustment member 50A (50), which is located closest to the axis C among the three airflow direction adjustment members 50A, 50B, 50C (50), the distance Da between the blade downwind portion 61X and the airflow inlet side end face 53 is approximately 7 mm. In addition, in the case of the third airflow direction adjustment member 50C (50), which is located farthest from the axis C, the distance Dc between the blade downwind portion 61X and the airflow inlet side end face 53 is approximately 2 mm.

<About the verification experiment>
The present applicant conducted an experiment to investigate the effect that differences in the separation distance between the airflow direction adjusting member 50 and the blades 61 have on the airflow blown from the blades 61. The experiment used the blower device 1 according to the embodiment and the blower device 1X according to the comparative example, and confirmed how the state of the airflow blown from the blades 61 through the guard 3 differed between the embodiment and the comparative example.

For both the air blower 1 and the air blower 1X, the subjects stood at a position several centimeters away from the guard 3 and felt the behavior of the air AR blown out through the gap 4 of the guard 3 with their own bodies, and based on this sensory evaluation, they confirmed and compared the differences in the state of the airflow between the air blower 1 according to the example and the air blower 1X according to the comparative example. Fig. 13 is a schematic diagram showing the flow of air through the guard when blown by the air blower according to the example, and Fig. 14 is a schematic diagram showing the flow of air through the guard when blown by the air blower according to the comparative example.

13 , in the blower 1 according to the embodiment, the separation distance D1c between points X and P in the axial direction AX is the aforementioned separation distance Dc = approximately 2 mm. Point X is any point located on a horizontal line passing through the downwind portion 61X of the blade 61 in the radial direction RD. Point P is any point located on a horizontal line passing through the airflow inlet end surface 53 of the third airflow direction adjustment member 50C in the radial direction RD.

On the other hand, in the blower device 1X according to the comparative example, the separation distance D2c between points X and Q in the axial direction AX exceeds 10 mm. Point X is any point located on a horizontal line passing through the downwind portion 61X of the blade 61 in the radial direction RD. Point Q is any point located on a horizontal line passing through the wind-inlet-side end surface 53 of the third airflow direction adjustment member 50C in the radial direction RD.

(Experimental results)
The experimental results are shown in Figures 13 and 14. In the case of the blower 1 according to the embodiment, as shown in Figure 13, the airflow AR sent out from the blades 61 passed through the gap 4, and due to the airflow direction adjusting member 50, the airflow AR was blown out from the guard 3 in a diffused manner into a wide airflow region STw, including a flow along the axial direction AX and a flow that was sufficiently spread out in the radial direction RD. The angle formed by the airflow region STw was, for example, approximately 100 to 150 degrees.

14, in the case of the blower 1X according to the comparative example, the airflow AR sent out from the blades 61 passes through the gap 4 and is blown out by the airflow direction adjusting member 50 in the form of a flow in the axial direction AX and a flow that does not sufficiently spread in the radial direction RD, and in the form of an airflow region STn that is hardly diffused from the guard 3, as compared to the example. The angle formed by the airflow region STn was, for example, about 40 to 60 degrees.

(Consideration)
As shown in Figures 13 and 14, in both the blower device 1 of the embodiment and the blower device 1X of the comparative example, the rotation of the blades 61 in the rotation direction RT sends wind AR to the downwind side Fd and blows it toward the body through the gap 4 in the guard 3.

13, in the blower 1 according to the embodiment, the separation distance D1c between point X and point P is approximately 2 mm, which is equal to or less than 10 mm, which is a guideline for maintaining a generally good laminar flow state F1. As a result, the air AR sent out from the blade 61 tends to flow into the gap 4 while maintaining a generally good laminar flow state F1 from point X until it reaches point P.

When the wind AR flows toward the downwind side Fd while remaining in a generally laminar flow state F1 and enters the gap 4 of the guard 3, the wind AR flows in a straight airflow state along the first side surface 52 of the laminar flow inlet portion 51 in the wind direction adjustment member 50 toward the wind direction variable portion 56. Then, when the wind AR in a straight airflow state approaches the wind direction variable portion 56, it hits the second side surface 57 that is bent outward in the radial direction RD (the side away from the axis C in FIG. 13 ), and the direction of the wind AR changes to a direction along the second side surface 57.

In addition, for the three wind direction adjustment members 50A, 50B, 50C (50), the bending angle θ of each wind direction adjustment member 50 is larger for the second wind direction adjustment member 50B than for the first wind direction adjustment member 50A, and is larger for the third wind direction adjustment member 50C than for the second wind direction adjustment member 50B.

Therefore, when the wind AR in a straight airflow state reaches each wind direction variable section 56 of the three wind direction adjustment members 50A, 50B, 50C (50), in the first wind direction adjustment member 50A, the wind AR hits the second side surface 57, which is bent at a bending angle θ1 = 45 (deg) toward the outside of the radial direction RD phase (the side away from the axis C in Figure 13), and flows along the second side surface 57, changing the direction of the wind AR.

Similarly, in the second wind direction adjustment member 50B, the wind AR hits the second side surface 57, which is bent outward in the radial direction RD at a bending angle θ2 = 60 (deg), and flows along the second side surface 57, causing the direction of the wind AR to change more significantly compared to the case of the first wind direction adjustment member 50A.

Similarly, in the third wind direction adjustment member 50C, the wind AR hits the second side surface 57, which is bent outward in the radial direction RD phase at a bending angle θ3 = 75 (deg), and flows along the second side surface 57, causing the direction of the wind AR to change more significantly compared to the case of the second wind direction adjustment member 50B.

Therefore, in the blower device 1 of the embodiment, as shown in Figure 13, it is thought that the wind AR is blown out through the gap 4 by the wind direction adjustment member 50 in a manner that includes a flow along the axial direction AX and also has sufficient expansion toward the radial direction RD, and is diffused from the guard 3 into a wide blowing area STw.

14, in the blower device 1X according to the comparative example, the separation distance D2c between point X and point Q exceeds 10 mm, which is the guideline for maintaining the laminar flow state F1 in a satisfactory manner. In the case of the comparative example, when the wind AR is sent out from the blades 61, it is presumed that the laminar flow state F1 is generally maintained between point X and point Q, up to point P, which is just before point Q.

However, once the wind AR sent out from the blades 61 passes point P, which is a target point where the laminar flow state F1 can be maintained well, the airflow of the wind AR is likely to become turbulent between point P and point Q. As a result, the airflow of the wind AR cannot maintain the laminar flow state F1 and becomes an airflow accompanied by, for example, vortices, making it difficult for the wind AR to flow straight to the downwind side Fd toward the three wind direction adjustment members 50A, 50B, 50C (50).

That is, the main factor causing turbulence in the airflow is that, strictly speaking, while the wind AR is being blown due to the rotation of the blade body 60, the airflow is sent intermittently to the downwind side Fd from each blade 61. At this time, the airflows sent from adjacent blades 61 with a time lag become such that the flow directions of the airflow sent first and the airflow sent afterwards become significantly different from each other once they reach a position beyond point P.

Therefore, when the airflow sent earlier and the airflow sent later join together, a vortex is generated in the flow of the wind AR. The generated vortex disturbs the airflow of the wind AR, making it impossible to maintain the laminar flow state F1 properly. Furthermore, when the wind AR sent out from the blade 61 passes point P and gradually moves away from the blade 61, the airflow becomes more susceptible to adverse effects caused by disturbances due to atmospheric conditions, such as the outside air around the rotating blade body 60, making it difficult to maintain the laminar flow state F1.

For this reason, even if the wind AR is blown from the blades 61 in a laminar flow state F1, by the time it reaches the three wind direction adjustment members 50A, 50B, 50C (50) and flows into the gap 4 of the guard 3, the wind AR has already become a turbulent airflow state accompanied by vortices, etc., i.e., a turbulent flow state F2.

When the wind AR in the turbulent state F2 flows into the gap 4 and passes through the wind direction changing section 56 from the laminar flow inlet section 51 in the wind direction adjusting member 50, even if the wind AR hits the second side surface 57 that is bent outward in the radial direction RD (the side away from the axis C in FIG. 14 ), it is unlikely to flow along the second side surface 57. Therefore, in the wind direction adjusting member 50, the direction of the wind AR is less likely to change along the second side surface 57 than in the case of the embodiment.

Therefore, in the blower device 1X of the comparative example, the wind AR is blown out through the gap 4 by the wind direction adjustment member 50 in a flow toward the axial direction AX and a flow that does not spread sufficiently in the radial direction RD, and it is thought that this is in a form of a blowing area STn that is not sufficiently diffused from the guard 3 compared to the case of the example.

<Overview of clothing 100 with air blower>
Next, an overview of the clothing with a fan 100 will be briefly explained using Figures 15 and 18. Figure 15 is an explanatory diagram showing a schematic diagram of clothing with a fan according to an embodiment. Figure 18 is a cross-sectional view taken along the line B-B in Figure 15, showing the flow of air blowing through the guard in the space between the clothing and the body.

15 to 18, clothing 100 with an air blower is formed by attaching the air blower 1 according to the present embodiment as a fan unit for blowing air to fabric 101 constituting a vest, as an example. Clothing 100 with an air blower is configured so that air blower 1 can blow air AR toward the body BS of a user HM.

The clothing 100 with a blower is used by people who particularly require cool air, such as workers who work outdoors in extreme heat, workers who work in indoor, humid environments while wearing work clothes, and people who engage in recreational activities, sports, or watching games under the scorching sun.

The form of the fabric 101 is not limited to a vest and can be variously modified. Fig. 15 shows the clothing 100 with air blowers 1 attached thereto, but the number of air blowers 1 attached to the fabric 101 is merely two, and is not limited to this embodiment and can be modified as appropriate.

15 to 18, when attaching the air blower 1 to the clothing 100 with the air blower, the air intake side peripheral wall 12 of the air intake side case 10 is inserted from the outside of the clothing fabric 101 into an opening 102 drilled in the clothing fabric 101. With the air intake side flange 11 of the air intake side case 10 in contact with a peripheral edge 103 formed by increasing rigidity on the outer periphery of the opening 102, the air blowing side case 30 is positioned between the body BS of the user HM and the inside of the clothing fabric 101, with the air blowing side flange 31 facing the inside of the clothing fabric 101.

The intake-side peripheral wall 12 of the intake-side case 10, which has been inserted through the opening 102, is located between the body BS of the user HM and the inside of the clothing material 101. This intake-side peripheral wall 12 is inserted inside the blower-side peripheral wall 32 of the blower-side case 30. Then, by rotating the intake-side case 10 and the blower-side case 30 relatively around the axis C, the protrusion 20 of the intake-side case 10 and the fixed guide 40 of the blower-side case 30 are engaged, and the intake-side case 10 and the blower-side case 30 are assembled together.

Thus, the peripheral portion 103 of the fabric 101 is sandwiched between the intake side flange 11 of the intake side case portion 10 and the blowing side flange 31 of the blowing side case portion 30, as shown in Figure 18, and the blower device 1 is attached to the fabric 101 of the clothing 100 with a blower device.

Next, the operation and effects of the air blower 1 and the clothing with an air blower according to this embodiment will be described.

The air blower 1 according to this embodiment has a blade 61 that rotates to blow air AR, and a guard 3 that covers the periphery of the blade 61 and the like on the leeward side Fd of the blown air and is formed to be breathable, and in the air blower 1, the guard 3 has one or more (three in this embodiment) airflow direction adjusting members 50A, 50B, 50C (50), and the airflow direction adjusting member 50 has a laminar flow introduction portion 51 that includes a first side 52 that is parallel to a rotation axis 71 of the blade 61, and a second side 52 that is parallel to the rotation axis 71. The guard 3 is characterized in that the wind direction adjusting members 50A, 50B, 50C (50) are adjacent to the gap 4 that forms the airflow path FL in the radial direction RD, and the first side 52 (52A, 52B) and the second side 57 (57A, 57B) are arranged in a position that contacts the airflow path FL.

Due to this feature, the directionality of the wind AR blown out from the guard 3 is increased compared to the blower device relating to the conventional technology described in Patent Document 1, etc., and the wind AR blows out from the guard 3 over a wider area in addition to flowing along the axial direction AX on the downwind side Fd.

18, in a case where the air blower 1 is attached to the fabric 101 and the air AR is blown to the body BS from the air blower 1, the distance from the fabric 101 to which the air blower 1 is attached to the body BS behind it is only a few centimeters. When the air blower 1 is used under such circumstances, the guard tip 3a of the guard 3 comes into contact with or close to the body BS.

In conventional air blowers such as those described in Patent Document 1, the air sent out from the propeller flows in a straight line along the axial direction of the propeller, passing through the gap in the guard located furthest downwind and being supplied to the body. As a result, the air mainly hits only the body-side contact area opposite the propeller. Moreover, the airflow in the internal space between the fabric and the body, particularly near the tip of the guard, becomes turbulent due to the mutual adverse effects of the airflow sent from the propeller and the airflow that changes direction after hitting the body-side contact area, generating vortices.

Therefore, in conventional air blowing devices, the air blown from the propeller tends to stagnate around the guard and does not reach a wide area from the air blowing device to the surrounding area within the space between the clothing fabric and the body.

In contrast to this, in the air blower 1 according to this embodiment, as shown in Fig. 13 etc., the direction of the airflow AR sent out from the blades 61 is changed by the airflow direction adjusting member 50 in the circulation path FL according to the bending angle θ of the second side surface 57 of the airflow direction changing part 56. Therefore, as shown in Fig. 18 as an example, even if the air blower 1 attached to the fabric 101 sends out the airflow AR into a narrow space formed only a few centimeters from the body BS, the airflow AR can reach a wide area from the air blower 1 to the surrounding area.

Furthermore, as shown in Figures 13 and 18, the wind AR sent out from the blades 61 does not stagnate around the guard 3, but flows through the gaps 4 in the guard 3 and around the blower device 1 in a widely diffused blowing area STw centered on the axis C.

In addition, the wind AR sent out from the blades 61 is distributed widely over the area surrounding the blower 1. Therefore, the user HM can receive the wind AR supplied from the blower 1 not only in the central area of the body BS facing the blade body 60, but also in surrounding areas away from the central area, improving the comfort of the user HM.

Therefore, according to the blower device 1 of this embodiment, the rotation of the blades 61 has the excellent effect of being able to control the wind direction so that the blown wind AR circulates over a wider area on the downwind side FD of the blades 61.

Furthermore, the blower device 1 according to this embodiment is characterized in that the three air direction adjustment members 50A, 50B, 50C (50) are arranged concentrically with the axis C of the rotating shaft 71 and intermittently overlap with a gap 4 in the radial direction RD.

Due to this feature, the wind AR sent out by the rotation of the blades 61 includes a flow along the axial direction AX due to the wind direction adjustment member 50, and also has a flow that is sufficiently expanded toward the radial direction RD, so that it diffuses into a wide air blowing area STw through the gap 4 of the guard 3.

In addition, the blower device 1 according to this embodiment is characterized in that the angle of the second side 57A (57) relative to the first side 52A (52) of each of the three airflow direction adjustment members 50A, 50B, 50C (50) increases from the inner side in the radial direction RD toward the outer side in the radial direction RD for each of the airflow direction adjustment members 50A, 50B, 50C (50).

Due to this feature, the wind AR sent out by the rotation of the blades 61 includes a flow along the axial direction AX due to the wind direction adjustment member 50, and also has a flow that is sufficiently expanded toward the radial direction RD, so that it diffuses into a wide air blowing area STw through the gap 4 of the guard 3.

In addition, the blower device 1 of this embodiment is characterized in that the distance Dc between the blade downwind portion 61P of the blade 61, which is located on the most downwind side Fd, and the wind inlet side end face 53 of the laminar flow introduction portion 51 of the wind direction adjustment member 50, which is located on the most upwind side Fw, is at most 10 mm or less.

Due to this feature, when the wind AR is sent out to the downwind side Fd by the rotation of the blades 61, the wind direction adjustment member 50 allows the wind AR to be blown out from the guard 3 in a diffused manner over a wide air blowing area STw, with a flow that includes a flow along the axial direction AX and is sufficiently expanded toward the radial direction RD.

Furthermore, in the blower device 1 according to this embodiment, the wind direction adjustment member 50 is characterized in that the wind inlet end face 53 of the laminar flow introduction section 51, which is located most upwind, and the first side face 52 are connected via an R-shaped inlet curved surface 54.

Due to this feature, when the wind AR attempting to flow into the gap 4 approaches the first side surface 52, the pressure loss of the airflow is reduced, the generation of vortices is suppressed at the inlet side curved surface 54, and the wind AR flows toward the second side surface 57.

In addition, in the blower device 1 of this embodiment, the air direction adjustment member 50 is characterized in that the first side surface 52 and the second side surface 57 are connected via an R-shaped bent side curved surface 58.

Due to this feature, when the wind AR that has flowed into the gap 4 flows from the first side surface 52 toward the second side surface 57, the pressure loss of the airflow is reduced as it approaches the second side surface 57 and passes through the gap 4, and the generation of vortices is suppressed at the bent side curved surface 58, allowing the wind AR to be supplied to the outside.

In addition, the blower device 1 of this embodiment is characterized in that it is equipped with a drive unit that rotates the blades, and the guard 3 is formed on the outer periphery of the drive unit 70 that is arranged in the center of the radial direction RD.

Due to this feature, the drive unit 70 is a part of the blower 1 that does not blow out the wind AR from the blades 61, so the blower 1 is compact and easy to use for the user.

Furthermore, the clothing with an air blower 100 according to this embodiment is characterized in that a fan unit that blows air is attached to the fabric 101, and in the clothing with an air blower that can blow air toward the body using the fan unit, the fan unit is the air blower 1 according to this embodiment.

This feature makes the clothing with air blowers 100 suitable for people who particularly need cool air, such as workers who work outdoors in extreme heat, workers who work in humid indoor environments while wearing work clothes, and people who engage in recreational activities, sports, or watching sports under the blazing sun. The clothing with air blowers 100 improves the comfort of the wearer HM compared to clothing with air blowers according to the prior art.

Therefore, the clothing with a blower 100 according to this embodiment has the excellent effect of improving the comfort of the user HM wearing the clothing by the air AR blown from the blower 1.

Although the present disclosure has been described above in accordance with the embodiments, the present disclosure is not limited to the above embodiments and can be modified and applied as appropriate within the scope of the gist thereof.

For example, in the embodiment, the blower fan that blows air by rotating blades is a propeller fan made up of the blade body 60. However, the blower fan may be, other than a propeller fan made up of the blade body 60, an axial flow fan, a turbo fan, a sirocco fan, or the like that is made up of a structure different from the blade body 60.

Furthermore, in the embodiment, a guard 3 having three wind direction adjustment members 50 formed thereon is described, but the number of wind direction adjustment members provided on the guard is not limited to three, and may be, for example, one or four or more, and can be changed as appropriate.

1 blower device 3 guard 4 gap 50, 50A, 50B, 50C airflow direction adjusting member 51 laminar flow introduction portion 52, 52A, 52B first side surface 53 airflow inlet side end surface 54 inlet side curved surface (curved surface)
56: Airflow direction changing portion 57, 57A, 57B: Second side surface 58: Bending side curved surface (curved surface)
61 Blade 61P Blade downwind portion 71 Rotation shaft 70 Moving part 100 Clothing with air blower 101 Clothing fabric BS Body CR Circumferential direction RD Radial direction AR Wind FL Air flow path Fd Downwind side Fw Upwind side Dc, D1c, D2c Separation distance θ Bending angle (angle between the first side and the second side)

Claims (7)

A blower device is attached to clothing and sends outside air to the body side of the clothing, the blower having blades that rotate to send air, and a guard that covers the blades on the leeward side of the blown air and is formed to be breathable, and the air is supplied by passing through the guard,
the guard has a plurality of wind direction adjustment members and ribs supporting the wind direction adjustment members, and the wind direction adjustment members are connected to a laminar flow introduction section including a first side surface parallel to the rotation axis of the blade, and a wind direction changing section including a second side surface bent radially outward around the rotation axis and connecting to the first side surface on the downwind side in the axial direction along the rotation axis,
In the guard, the airflow direction adjusting member is disposed in a state in which it is connected to and crosses the rib formed in the radial direction, and is adjacent to a gap that serves as a flow path for air in the radial direction, and the first side surface and the second side surface are disposed at a position where they contact the flow path for air;
In the plurality of airflow direction adjustment members, an angle of the second side surface relative to the first side surface increases from the radially inner side toward the radially outer side for each of the airflow direction adjustment members;
In the airflow direction adjustment member, the laminar flow introduction portion is formed in a manner extending toward the blade side more than the rib in the axial direction;
the plurality of airflow direction adjustment members include a first airflow direction adjustment member disposed closest to the rotation axis in the radial direction and a second airflow direction adjustment member disposed farthest from the rotation axis,
In the axial direction and on the downwind side of the blade, among the plurality of airflow direction adjustment members, the laminar flow introduction portion of the first airflow direction adjustment member is arranged at a position farthest from the blade, and the laminar flow introduction portion of the second airflow direction adjustment member is arranged at a position closest to the blade,
the airflow direction changing portion of the first airflow direction adjustment member is disposed at a position farthest from the blade, and the airflow direction changing portion of the second airflow direction adjustment member is disposed at a position closest to the blade;
When attached to the clothing, the wind sent out from the wings is made to flow into the gap in a straight airflow state toward the plurality of wind direction adjustment members, so that the wind that has passed through the gap is sent into the space between the clothing side and the body side by the plurality of wind direction adjustment members in a flow that spreads radially outward from the gap.
A blower device characterized by the above. The blower device according to claim 1,
The plurality of airflow direction adjustment members are arranged concentrically about the center of the rotation shaft and overlap each other intermittently with the gap in between in the radial direction;
A blower device characterized by the above. The blower device according to claim 1,
a distance between a leeward portion of the blade, which is located on the leeward side, and a wind-inlet-side end face of the laminar flow introduction portion of the airflow direction adjustment member, which is located on the windward side, is at most 10 mm or less;
A blower device characterized by the above. The blower device according to claim 1,
In the airflow direction adjustment member, an airflow inlet end surface located most windward of the laminar flow introduction portion and the first side surface are connected via an R-shaped curved surface;
A blower device characterized by the above. The blower device according to claim 1,
In the airflow direction adjustment member, the first side surface and the second side surface are connected via an R-shaped curved surface;
A blower device characterized by the above. The blower device according to claim 1,
a drive unit that rotates the blades,
the guard is formed on the outer periphery of the drive part disposed at the center in the radial direction;
A blower device characterized by the above. A fan unit for blowing air is attached to the fabric of the garment, and the fan unit can blow air toward the body.
The fan unit is a blower device according to any one of claims 1 to 6.
Clothing with a blower, characterized by: