TW201817978A - Electrically operated air blower, electric vacuum cleaner, and hand dryer - Google Patents

Abstract

Provided are an electrically operated air blower having improved efficiency, and an electric vacuum cleaner and a hand dryer provided with this electrically operated air blower. The electrically operated air blower is provided with an electrical operation part, a centrifugal impeller, a main plate (11), and a plurality of stator vanes (12). Each of the plurality of stator vanes (12) has an inlet mounting angle formed on a cross-section by a line tangent to a center line passing through an inner peripheral end and a tangent line that, in the inner peripheral end, adjoins an arc which passes through the inner peripheral end and is centered about a rotational center (O) passing through the inner peripheral end. In each of the plurality of stator vanes (12), a first inlet mounting angle in a first cross-section perpendicular to an extension direction is positioned further from a first surface (11A) of the main plate (11) than is the first cross-section, and is smaller than a second inlet mounting angle in a second cross-section perpendicular to the extension direction.

Description

   Electric hair dryer, electric vacuum cleaner and dryer   

The invention relates to an electric hair dryer, an electric vacuum cleaner and a hand dryer.

In the past, electric hair dryers for electric vacuum cleaners have been known. The electric hair dryer mainly includes a telecentric impeller fixed on a rotating shaft rotated by a motor, and a diffuser formed on a downstream side of the telecentric impeller. The telecentric impeller includes a protruding portion and a plurality of moving wings formed on the suction port side of the protruding portion. The diffuser includes a base plate (main plate) formed between the motor and the telecentric impeller, a plurality of stationary vanes formed on the substrate on the intake port side, and a plurality of return stationary vanes formed on the motor side. The diffuser makes the flow changing portion from the stationary blade side to the stationary blade side slightly spiral to reduce the ventilation resistance (for example, refer to Japanese Patent Application Laid-Open No. 2010-249038 (Patent Document 1)).

Generally, in the electric hair dryer, the flow velocity of the gas blown from the telecentric impeller varies depending on the position in which the rotation axis extends. Specifically, the flow velocity of the gas flowing out from the plurality of moving blades through the position close to the protruding portion in the extension direction becomes larger than that of the gas flowing out from the plurality of moving blades through the position away from the projection in the extending direction. The absolute flow rate (hereinafter referred to as the flow rate) is slower. The outflow direction of the gas blown from the telecentric impeller varies according to its flow velocity. Therefore, the outflow angle between the outflow direction of the gas blown from the telecentric impeller and the rotation direction of the rotation shaft varies depending on the position in the above-mentioned extension direction.

    [Advanced technical literature]    

Patent Document 1: Japanese Patent Application Laid-Open No. 2010-249038

In the conventional electric hair dryer, the center line of each of the plurality of stationary blades in a cross section perpendicular to the extending direction has an inner peripheral end portion located closest to the rotation axis and an outer peripheral end portion located farthest from the rotation axis. Then, each of the plurality of static wings has a tangent line tangent to the center line at the inner peripheral end portion and a tangent line tangent to the arc at the inner peripheral end portion with the rotation axis as the center and passing through the inner peripheral end portion, The entrance angle formed by the two in the cross section. Then, in the conventional electric hair dryer, the entrance setting angle of each of the plurality of stationary blades is formed constant regardless of the position of the cross section in the extending direction of the rotation shaft.

Therefore, in the conventional inlet angle of the electric hair dryer, at least a part of the extension direction does not correspond to the outflow angle, and at least a part of the gas blown out from the telecentric impeller cannot flow along the static wing. For example, when the inlet installation angle is formed along the outflow direction of the gas flowing out between the plurality of moving blades at a position away from the protrusion in the extension direction, the movement angle from the plurality of movements in the extension direction is near the protrusion. Gas flowing between the wings cannot flow along the shape of the above-mentioned static wings. Therefore, the flow of gas is disturbed between a plurality of static wings, and a local countercurrent is generated. As a result, in the conventional electric hair dryer, it is difficult to improve efficiency. In particular, in the conventional electric blower with a reduced diameter, there is a problem that the efficiency is greatly reduced due to the above-mentioned disturbance between a plurality of static wings.

In order to solve the above problems, the present invention aims to provide an electric hair dryer with improved efficiency, an electric vacuum cleaner provided with the electric hair dryer, and a hand dryer.

The electric hair dryer of the present invention includes: an electric part including a motor and a rotating shaft rotated by the motor; a telecentric impeller connected to the rotating shaft; a main board arranged between the motor and the telecentric impeller in an extension direction of the rotating shaft; and a plurality of The stationary blade is formed to surround the telecentric impeller in a direction intersecting the extending direction of the rotation axis. The main plate has a first surface that extends in the intersection direction and is located on the telecentric impeller side in the extension direction. Each of the plurality of static wings is connected to the first surface. In the extension direction, the center line of each of the plurality of static wings on a cross section perpendicular to the extension direction has an inner peripheral end portion located closest to the rotation axis and an outer periphery located farthest from the rotation axis. Ends. Each of the plurality of static wings has an entrance setting angle, and the entrance setting angle is a tangent line tangent to the inner peripheral end portion of the center line and an inner peripheral end of a circular arc that passes through the inner peripheral end portion with the rotation axis as the center. The tangent of the two tangents, the angle formed by the two tangents on the section. In each of the plurality of static wings, the entrance setting angle on the first section perpendicular to the extending direction is farther from the first surface than the first section, and at the second second perpendicular to the extending direction. The entrance setting angle on the section is small.

According to the present invention, in each of the plurality of static wings, the entrance setting angle on the first section perpendicular to the extending direction of the rotation axis is farther from the first surface than the first section, and is perpendicular to the first section. The entrance setting angle on the second cross section in the extending direction is small. Therefore, according to the electric hair dryer of the present invention, compared with the conventional electric hair dryer, it is possible to suppress the formation of the flow of the gas that cannot flow into the plurality of stationary wings along the inlet installation angle. Therefore, according to the present invention, it is possible to provide an electric hair dryer with improved efficiency, and an electric vacuum cleaner and a hand dryer provided with the electric hair dryer.

1‧‧‧ Electric hair dryer

2‧‧‧ Electric Department

3‧‧‧ rotor

4‧‧‧ stator

5‧‧‧ shaft

6‧‧‧ Telecentric Impeller

7‧‧‧ hub

8‧‧‧ moving wings

10‧‧‧ diffuser

11‧‧‧ Motherboard

11A‧‧‧Part 1

11B‧‧‧Part 2

12‧‧‧Jingyi

12A‧‧‧Part 1

12B‧‧‧Part 2

13‧‧‧ Return to Jingyi

14‧‧‧fan cover

15‧‧‧carriage

16‧‧‧Exhaust

17‧‧‧ Suction port

18‧‧‧flare

19‧‧‧Motor frame

20‧‧‧ Spit Out

21‧‧‧ Clearance

100‧‧‧ Electric Vacuum Cleaner

101‧‧‧Vacuum cleaner body

102‧‧‧tube

103‧‧‧ extension tube

104‧‧‧Inhaler

105‧‧‧ Dust collection department

107‧‧‧Exhaust

108‧‧‧ rear wheels

110‧‧‧dryer

111‧‧‧shell

112‧‧‧Hand insertion section

113‧‧‧Water receiving department

114‧‧‧ Suction port

115‧‧‧Nozzle

A1, A2, B1, B2‧‧‧ Shape line

FEA‧‧‧The first end

BEA‧‧‧ 2nd end

FEB‧‧‧ 3rd end

BEB‧‧‧ 4th end

CLA‧‧‧The first center line

CLB‧‧‧ 2nd center line

TFA‧‧‧1st tangent

TFB‧‧‧Third Tangent

TBA‧‧‧5th tangent

TBB‧‧‧7th tangent

T1‧‧‧2nd and 4th tangent

T2‧‧‧6th tangent

T3‧‧‧8th tangent

T4‧‧‧9th tangent

T5‧‧‧Tenth tangent

T6‧‧‧11th tangent, 12th tangent

CI1‧‧‧1st arc, 2nd arc

CI2‧‧‧The third arc

CI3‧‧‧The fourth arc

CI4‧‧‧The fifth arc

CI5‧‧‧The sixth arc

CI6‧‧‧7th arc, 8th arc

O‧‧‧ rotation center

θ _IA ‧‧‧ 1st entrance setting angle, 3rd entrance setting angle

θ _IB ‧‧‧ 2nd entrance setting angle, 4th entrance setting angle

θ _OA ‧‧‧ 1st exit setting angle, 3rd exit setting angle

θ _OB ‧‧‧ 2nd exit setting angle, 4th exit setting angle

FIG. 1 is a cross-sectional view of the electric hair dryer according to Embodiment 1 along the extension direction of the rotation axis.

Fig. 2 is a perspective view showing a diffuser according to a first embodiment.

FIG. 3 shows the entrance installation angle and the exit installation angle of the stationary wing of the first embodiment.

Fig. 4 is a graph showing a rate of change of the entrance installation angle of the stationary wing of the first embodiment.

FIG. 5 shows the absolute velocity distribution of the gas blown out from the telecentric impeller of Embodiment 1 obtained by fluid analysis.

Fig. 6 shows the entrance installation angle and the exit installation angle of the stationary wing of the second embodiment.

Fig. 7 is a perspective view showing a diffuser according to a third embodiment.

FIG. 8 shows a stationary wing of Embodiment 3.

FIG. 9 shows the rate of change of the entrance setting angle of the stationary wing of the implementation mode 4. FIG.

Fig. 10 is a graph showing a rate of change of the exit installation angle of the stationary wing of the embodiment 4;

FIG. 11 is a cross-sectional view of a portion located on the inner peripheral side of the stationary blade of Embodiment 4 along the extension direction of the rotation axis.

FIG. 12 is a cross-sectional view of a portion located on the outer peripheral side of the stationary blade of Embodiment 4 along the extending direction of the rotation axis.

Fig. 13 is a schematic diagram showing an electric vacuum cleaner according to a fifth embodiment.

Fig. 14 is a schematic diagram showing a dryer in the sixth embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same or equivalent parts in the following drawings are denoted by the same symbols, and descriptions thereof are omitted.

    Implementation type 1         <Structure of Electric Hair Dryer>    

An electric hair dryer according to a first embodiment will be described with reference to FIGS. 1 to 4. The arrow in FIG. 1 illustrates a part of the flow of the gas in the electric hair dryer.

As shown in FIG. 1, an electric hair dryer 1 according to an embodiment of the present invention mainly includes an electric unit 2, a telecentric impeller 6, and a diffuser 10.

The electric part 2 includes a rotor 3 and a stator 4 as motors, and a rotating shaft 5 (rotation shaft) as an output shaft connected to the rotor 3. The electric part 2 rotates the telecentric impeller 6 via a rotation shaft 5 (rotation shaft). Hereinafter, the extension direction of the rotation shaft 5 (the extension direction of the rotation center O indicated by a dotted line in the first figure) is simply referred to as the extension direction. Hereinafter, a radial direction that is perpendicular to the extending direction and extends from the center of the rotation shaft 5 to the outer peripheral side is simply referred to as a radial direction. Hereinafter, in the extending direction, the suction side of the electric hair dryer 1 is referred to as a front side, and the opposite side to the suction side is referred to as a rear side.

The telecentric impeller 6 includes a hinge 7 and a plurality of moving wings 8. The planar shape of the hub 7 is circular. The central portion of the hub 7 in the radial direction protrudes more forward than the outer peripheral portion of the hub 7 on the outer peripheral side than the central portion in the radial direction. The plurality of moving blades 8 are provided at intervals from each other in a rotation direction perpendicular to the extending direction.

The diffuser 10 is disposed on the downstream side of the telecentric impeller 6 in the flow path of the gas formed in the electric blower 1. The diffuser 10 is composed of a main plate 11, a plurality of stationary blades 12, a return stationary blade 13, a fan cover 14, and a bracket 15.

The main plate 11 is disposed between the telecentric impeller 6 and the motor. The main plate 11 is arranged on the downstream side of the telecentric impeller 6. The main plate 11 is arranged on the outer peripheral side of the telecentric impeller 6 in the radial direction. The main board 11 includes a first surface 11A and a second surface 11B. The first surface 11A extends in the intersection direction and is located on the telecentric impeller 6 side (front side) in the extension direction. The second surface 11B extends in the intersection direction and is located on the motor side (rear side) in the extension direction. When viewed from the extending direction, the outer shape of the main board 11 is circular. When viewed from the extending direction, the planar shape of the main board 11 is, for example, a ring shape.

The plurality of static wings 12 are connected to the first surface 11A of the main board 11. Each of the plurality of stationary blades 12 is formed on the outer peripheral side of the plurality of movable blades 8 in the radial direction. The plurality of stationary blades 12 are formed at intervals from each other in the rotation direction. The detailed structure of the plurality of static wings 12 will be described later. A plurality of return static wings 13 are connected to the second surface 11B of the main board 11. The plurality of return static blades 13 are formed at intervals from each other in the above-mentioned rotation direction.

The fan cover 14 is formed so as to include a telecentric impeller 6 and a plurality of stationary blades 12. The fan cover 14 is provided outside the plurality of moving wings 8 and the plurality of static wings 12 in the extending direction. The fan cover 14 is provided outside the main board 11 in the radial direction. A gap 21 is formed between the main plate 11 and the fan cover 14 to connect a gas flow path between the stationary blades 12 and a gas flow path between the stationary blades 13. In the gap 21, the flow direction of the gas is reversed. At the center of the fan cover 14, a bell mouth 18 is provided at a position facing the suction port 17 of the telecentric impeller 6 to regulate the opening.

The bracket 15 is formed so as to connect the fan cover 14 and include a return static blade 13 therein. Discharge ports 16 are formed at a plurality of positions on the bracket 15, and air passing through the telecentric impeller 6 and the diffuser 10 in this order is discharged. A motor outer frame 19 that connects the bracket 15 and includes the electric unit 2 is provided below the bracket 15. A plurality of positions on the motor outer frame 19 are formed with discharge ports 20 for sequentially discharging air passing through the telecentric impeller 6, the diffuser 10, and the electric unit 2.

Next, a detailed structure of the plurality of static wings 12 will be described with reference to FIGS. 1 to 4. As shown in FIGS. 1 and 2, each of the plurality of stationary wings 12 includes a first portion 12A and a second portion 12B. The first portion 12A is an end located on the rear side in the extending direction. The second portion 12B is an end portion located on the front side in the extending direction. The first portion 12A is a part of the stationary blade 12 connected to the first surface 11A of the main board 11. From a different point of view, the first portion 12A is a part of the static wing 12 and has a first cross section perpendicular to the extending direction. The first cross section is a cross section formed on the same surface as the first surface 11A. The second portion 12B is, for example, a part of the stationary blade 12 connected to the fan cover 14. From a different point of view, the second portion 12B is a part of the stationary blade 12 and has a second cross section perpendicular to the extending direction. The second cross section is located at a distance from the length of the stationary blade 12 in the extending direction of the first surface 11A than the first cross section. FIG. 3 shows the first portion 12A and the second portion 12B projected on a plane parallel to the first cross section and the second cross section. In Fig. 3, only a part of the plurality of static wings 12 is drawn. The cross-sectional shape of the first portion 12A perpendicular to the extending direction is, for example, equal to the cross-sectional shape of the second portion 12B perpendicular to the extending direction.

As shown in FIG. 3, the centerline CLA of the first portion 12A has a first end portion FEA (inner peripheral end portion) located at the position closest to the rotation center O, and a second end portion located at the position farthest from the rotation center O. BEA (peripheral end). The first centerline CLA is a line that connects the center of a circle inscribed in the first portion 12A in the above-mentioned rotation direction and the center of the circle in the outside of the first portion 12A. The first center line CLA is formed in an arc shape, for example. The first end portion FEA is formed rearward in the rotation direction than the second end portion BEA.

As shown in FIG. 3, the second portion 12B and the second center line CLB have a third end portion FEB (inner peripheral end portion) located closest to the rotation center O and a fourth end located farthest from the rotation center O. Part BEB (outer peripheral end part). The second center line CLB is a line that connects the center of a circle inscribed in the second portion 12B in the above-mentioned rotation direction and the center of the circle in the shape line located behind the second portion 12B. The second center line CLB is formed in an arc shape, for example. The third end portion FEB is formed rearward in the rotation direction than the fourth end portion BEB.

As shown in FIG. 3, regarding the first portion 12A, the first tangent line TFA and the second tangent line T1 are considered. The first tangent line TFA is a tangent line that passes through the first centerline CLA of the first portion 12A of the first end portion FEA. The second tangent line T1 is a tangent line that passes through the first end portion FEA and passes through the first arc F1 of the first end portion FEA with the rotation center O as the center. A first entrance setting angle θ _IA is formed between the first tangent line TFA and the second tangent line T1 on the first cross section.

As shown in FIG. 3, regarding the second portion 12B, a third tangent TFB and a fourth tangent T1 are considered. The third tangent line TFB is a tangent line that passes through the second center line CLB of the second portion 12B of the third end portion FEB. The fourth tangent line T1 is a tangent line passing through the third end FEB and passing through the second arc CI1 with the center of rotation O as the center and passing through the third end FEB. The fourth tangent line overlaps with the second tangent line when viewed from the extension direction, and thus is indicated by T1 in the third figure. The second arc is overlapped with the first arc CI1 when viewed in the extension direction, so it is represented by CI1 in the third figure. A second entry setting angle θ _IB is formed between the third tangent line TFB and the fourth tangent line T1 on the second cross section.

As shown in FIG. 3, regarding the first portion 12A, the fifth tangent line TBA and the sixth tangent line T2 are considered. The fifth tangent line TBA is a tangent line that passes through the first center line CLA of the second end BEA. The sixth tangent line T2 is a tangent line that passes through the second end portion BEA and passes through the center of rotation O as the center and passes through the third arc CI2 of the second end portion BEA. A first exit setting angle θ _OA is formed between the fifth tangent line TBA and the sixth tangent line T2 on the first cross section.

As shown in FIG. 3, regarding the second portion 12B, the seventh tangent TBB and the eighth tangent T3 are considered. The seventh tangent line TBB is a tangent line that passes through the second center line CLB of the fourth end portion BEB. The eighth tangent line T3 passes through the fourth end portion BEB, and the tangent line passes through the fourth arc CI3 with the center of rotation O as the center and passes through the fourth end portion BEB. A second exit setting angle θ _OB is formed between the seventh tangent line TBB and the eighth tangent line T3 on the second cross section.

As shown in FIG. 3, each of the plurality of stationary wings 12 constitutes a first entrance installation angle θ _IA smaller than a second entrance installation angle θ _IB . Each of the plurality of stationary wings 12 constitutes a first exit installation angle θ _OA that is smaller than a second exit installation angle θ _OB . In the plurality of stationary blades 12, the first end portion FEA and the third end portion FEB are overlapped in the extending direction. In the plurality of stationary blades 12, the second end portion BEA is formed forward than the fourth end portion BEB in the above-mentioned rotation direction. In the plurality of stationary blades 12, the second end portion BEA is formed inwardly of the fourth end portion BEAB in the radial direction.

In an arbitrary cross section perpendicular to the extending direction, the entrance setting angle of each of the plurality of stationary blades 12 can be defined in the same manner as the first entrance setting angle θ _IA and the second entrance setting angle θ _IB . In any section perpendicular to the extending direction, the exit installation angle of each of the plurality of stationary blades 12 can be defined in the same manner as the first exit installation angle θ _OA and the second exit installation angle θ _OB . Then, regarding each of the plurality of static wings 12, when considering any two cross sections perpendicular to the above-mentioned extending direction, the entrance setting angle on the cross section on the side closer to the first surface 11A will be larger than that on the side on the side. The entrance setting angle of the cross section whose cross section is further away from the first surface 11A is small.

As shown in FIG. 2 and FIG. 3, among the plurality of static wings 12, the portion located on the outer peripheral side from the inner peripheral end portion, for example, moves from the first portion 12A toward the second portion in the extending direction. The part 12B advances and inclines toward the rear side in the rotation direction. In each of the plurality of static wings 12, the entrance setting angle on the third section located between the first section and the second section and perpendicular to the extending direction may exceed the first entrance setting angle θ _IA , for example. In addition, the second entrance setting angle θ _{IB is} less than. In each of the plurality of stationary blades 12, the exit installation angle in the third section may exceed the first exit installation angle θ _OA and be less than the second exit installation angle θ _{OB, for example} .

As shown in FIG. 4, the entrance installation angle of the plurality of stationary blades 12 changes at a constant ratio in accordance with the position in the extending direction (the height relative to the first surface 11A), for example. In addition, the horizontal axis of FIG. 4 shows the position in the extending direction of the plurality of stationary blades 12, and the vertical axis of FIG. 4 shows the entrance setting angle at the position. Similarly, the exit installation angle of the plurality of stationary blades 12 changes at a constant ratio in accordance with the position in the extending direction (the height relative to the first surface 11A).

In the plurality of static wings 12, each of the plurality of first end portions FEA is disposed on the first arc CI1, and each of the plurality of third end portions FEB is disposed on the second arc CI1. In the plurality of static wings 12, each of the plurality of second end portions BEA is disposed on the third arc CI2, and each of the plurality of fourth end portions BEA is disposed on the fourth arc CI3.

As shown in FIGS. 1 and 2, the outer diameter L1 of the plurality of stationary blades 12 is larger than the outer diameter L2 of the main plate 11. The outer diameter L1 of the plurality of static wings 12 is equal to the diameter of a circle formed by the parts located on the outermost side in the radial direction of the second portion 12B of the plurality of static wings 12 and is slightly equal to diameter. The outer diameter L2 of the main plate 11 is equal to or larger than the diameter of the first arc CI1. The outer diameter L2 of the main plate 11 is less than the diameter of the fourth arc CI3.

As shown in FIG. 3, in a cross section perpendicular to the extending direction, the center of curvature of the outline of each of the plurality of static wings 12 located in the forward direction in the rotation direction is closer than the forward outline. Ahead. In the cross section, the center of curvature of the outline of each of the plurality of stationary blades 12 located rearward in the rotation direction is located further forward than the forward outline. The distance between the contour line located in the forward direction and the contour line located in the rear direction of the stationary blade 12 in other words, the thickness of the stationary blade 12 is slightly equal in the extending direction of the centerline.

    <Operation of Electric Hair Dryer>    

As shown in FIG. 1, the electric hair dryer 1 rotates the rotating shaft 5 when power is supplied to the electric unit 2. As the rotation shaft 5 rotates, the telecentric impeller 6 attached to the rotation shaft 5 rotates and sucks air from the suction port 17. The air sucked into the electric blower 1 by the telecentric impeller 6 is boosted and increased in speed by the telecentric impeller 6 and moves outward in the radial direction while rotating. The air discharged from the telecentric impeller 6 is decelerated and boosted between the plurality of stationary blades 12 of the diffuser 10. After that, the gas flowing between the plurality of static wings 12 flows out to the gap 21. A part of the gas flowing out of the gap 21 is guided to the side of the electric unit 2 by the return static wing 13 and is discharged from the outlet 20 to the outside of the electric blower 1. The remainder of the gas flowing out of the gap 21 is discharged from the discharge port 16 to the outside of the electric blower 1.

    <Effects of electric hair dryer>    

As shown in FIGS. 1 to 4, the electric hair dryer 1 includes an electric unit including a rotating shaft 5, a telecentric impeller 6 connected to the rotating shaft 5, a main plate 11 disposed between the motor and the telecentric impeller 6, and a direction intersecting with the extending direction. A plurality of stationary blades 12 are formed to surround the telecentric impeller 6. The main plate 11 has a first surface 11A extending in the intersection direction and located on the telecentric impeller 6 side in the extension direction. Each of the plurality of static wings 12 is connected to the first surface 11A. The center line of each of the plurality of stationary blades 12 on a cross section perpendicular to the extending direction has an inner peripheral end portion located closest to the rotation axis 5 and an outer peripheral end located farthest from the rotation axis 5. unit. Each of the plurality of static wings 12 has a tangent line that is tangent to the center line at the inner peripheral end portion, and a tangent line that is tangent to the inner peripheral end portion with an arc that passes through the inner peripheral end portion around the rotation axis 5 The tangent sets an angle at the entrance formed by the cross section. In each of the plurality of static wings 12, the first entrance angle θ _IA on the first section perpendicular to the extension direction is located farther away from the first surface 11A than the first section and is perpendicular to The second entrance installation angle θ _IB on the second section in the extending direction is small.

As shown in FIG. 5, in the electric hair dryer 1, the flow velocity of the gas blown out from the telecentric impeller 6 shows a distribution according to the position in the extending direction. The velocity of gas blown out from a region relatively close to the hub 7 (see FIG. 1) in the direction of extension is higher than the velocity of gas blown from a region relatively farther from the hub 7 (see FIG. 1) in the direction of extension slow.

The outflow direction of the gas blown from the telecentric impeller 6 varies depending on the flow velocity of the gas. Considering the velocity of the gas blown from the telecentric impeller 6 into the velocity component along the radial direction and the velocity component along the rotational direction, the velocity component along the radial direction decreases as it moves toward the stationary blade 12. The proportion of the components in the rotation direction is gradually increased. Therefore, the outflow angle of the gas blown from the telecentric impeller 6 and the outflow angle between the outflow direction and the rotation direction will form a small angle. From the gas blown out from the telecentric impeller 6 at a lower speed, the outflow angle between the outflow direction and the outflow angle formed by the above-mentioned rotation direction will form a smaller angle. That is to say, the outflow angle of the gas blown out from the area relatively close to the hub 7 in the above-mentioned extension direction will advance toward the static wing 12 as compared with the gas blown out relatively from the area of the hub 7 in the above-mentioned extension direction. Outflow angle is smaller.

This speed distribution (outflow angle distribution) will depend on the structure of the telecentric impeller, and the conventional electric hair dryer will show the same speed. In the conventional electric hair dryer, the inlet setting angles of the plurality of stationary wings are kept constant regardless of the position of the extension direction, and are not designed in consideration of the velocity distribution of the gas blown from the telecentric impeller. Therefore, the gas flow between the plurality of stationary wings in the conventional electric hair dryer is disordered, and it is difficult to improve the efficiency. In particular, in a conventional electric hair dryer with a reduced diameter, the above-mentioned disturbance causes a significant decrease in efficiency. In the small-sized electric hair dryer, the telecentric impeller, the main board and the fan cover are all reduced in diameter. The outflow angle of the gas blown from the small-diameter telecentric impeller becomes larger than the outflow angle of the gas blown from the large-diameter telecentric impeller. Therefore, in a small-diameter electric hair dryer, the gas having a larger outflow angle and exhibiting the velocity distribution flows into the static wing that forms a certain entrance setting angle without being affected by the position of the extension direction. Disturbance makes efficiency even worse.

On the other hand, in the electric blower 1, the installation angle of the plurality of stationary blades 12 is designed in consideration of the velocity distribution of the gas blown out from the telecentric impeller, and varies depending on the position in the extending direction.

The gas blown out from the area relatively close to the hub 7 (refer to FIG. 1) in the extending direction flows into the area relatively close to the first surface 11A between the plurality of static wings 12. The gas blown out from the area relatively far from the hub 7 (refer to FIG. 1) in the extending direction flows into the area between the plurality of static wings 12 relatively far from the first surface 11A of the main board 11. Then, the entrance setting angle obtained from the shape of the static wing 12 on a section relatively close to the first surface 11A and perpendicular to the extending direction is smaller than the static angle on the section relatively far from the first surface 11A and perpendicular to the extending direction. The entrance setting angle obtained by the shape of the wing 12 is small. For example, the first entrance setting angle θ _IA is smaller than the second entrance setting angle θ _IB .

Therefore, the plurality of stationary wings 12 of the electric hair dryer 1 can be formed along the outflow direction of the gas that passes through the position near the hub 7 in the above-mentioned extension direction and flows out from between the plurality of rotor blades 7 and can pass along the above-mentioned extension direction. It is formed away from the position of the hub 7 and formed in the outflow direction of the gas flowing out between the plurality of moving wings. As a result, in the electric hair dryer 1, the gas blown out from the telecentric impeller 6 can flow in the diffuser 10 along the stationary blade 12. Therefore, compared with the conventional electric hair dryer, the electric hair dryer 1 can suppress the occurrence of flowing peeling, reduce the collision loss, and improve the efficiency. In particular, the electric hair dryer 1 can be provided with a plurality of stationary blades 12 even when the diameter is reduced, and these stationary blades 12 show an inlet installation angle corresponding to the outflow angle of the gas blown from the reduced-diameter telecentric impeller 6. Therefore, the electric hair dryer 1 has high efficiency even when the diameter is reduced.

Each of the plurality of stationary wings 12 of the electric hair dryer 1 is located between the first cross section and the second cross section, and the entrance setting angle on the third cross section perpendicular to the extending direction may exceed the first cross section. 1 entrance setting angle θ _IA but less than the second entrance setting angle θ _IB .

The plurality of stationary blades 12 of the electric hair dryer 1 are more appropriately formed in accordance with the speed distribution shown in FIG. 5. For example, the plurality of stationary blades 12 can be formed along the outflow direction of the gas flowing out of the plurality of moving blades 8 by moving away from the hinge 7 and the fan cover 14 in the extending direction. As a result, the electric hair dryer 1 is more efficient than the conventional electric hair dryer.

As shown in FIG. 3, in the electric hair dryer 1, each of the plurality of stationary wings 12 has a tangent line tangent to the center line at the outer peripheral end portion, and has a rotation center O as a center and passes through the outer peripheral end portion. The tangent of the circular arc at the outer peripheral end portion is tangent, and the two tangent lines set an angle at the exit formed on the cross section. In each of the plurality of stationary wings 12, the first exit installation angle θ _OA on the first cross section is smaller than the second exit installation angle θ _OB on the second cross section.

Therefore, when the gas flowing between the plurality of static wings 12 flows into the space between the static wings 13 through the gap 21, the gas flowing out from the plurality of static wings 12 near the first surface 11A can collide with the fan. The cover 14 flows between the return static wings 13. As a result, the electric blower 1 has a lower ventilation resistance than the conventional electric blower.

In the above-mentioned electric hair dryer 1, in a cross section perpendicular to the extending direction, each of the plurality of stationary blades 12 has a slightly arc shape on one side and the other side in the rotation direction. Therefore, the flow path of the gas formed between the plurality of stationary wings 12 does not expand sharply on the way, but is smoothly formed from the upstream side between the inner peripheral ends to the downstream side between the outer peripheral ends. . As a result, in the electric hair dryer 1 described above, it is possible to suppress a lower-speed gas stall among the gases flowing between the plurality of stationary blades 12.

In the electric hair dryer 1 described above, the outer shape of the main board 11 is circular when viewed from the extending direction. Therefore, an end portion located on the inner peripheral side of the gap 21 is formed in a ring shape. As a result, in the electric hair dryer 1 described above, the ventilation resistance of the gap 21 is further reduced. The outer shape of the main board 11 when viewed from the extending direction is not limited to a circular shape, and may be a slightly circular shape. Slightly circular means shapes other than circular, oval, and the like. The external shape of the main board when viewed from the extending direction may be a polygon such as a regular twelve corner.

In the electric hair dryer 1 described above, the outer diameter L1 of the plurality of stationary blades 12 is larger than the outer diameter L2 of the main plate 11. In such an electric hair dryer 1, although a gap 21 is formed between the main plate 11 and the fan cover 14 to turn the flow direction of the gas, a portion of the outer peripheral end portion of the plurality of stationary blades 12 located away from the main plate 11. Will be formed closer to the fan cover 14. Therefore, the static pressure rise rate of the electric hair dryer 1 is increased, the ventilation resistance is reduced, and the efficiency is high. The outer diameter of the plurality of stationary blades 12 may be equal to the outer diameter of the main plate 11.

In addition, in each of the plurality of static wings 12, the third entrance setting angle may be at least the first entrance setting angle _θIA or more and the second entrance installation angle θ _IB or less. In addition, in each of the plurality of stationary wings 12, the third exit installation angle may be at least the first exit installation angle θ _OA or more and the second exit installation angle θ _OB or less.

    Implementation type 2    

An electric hair dryer according to a second embodiment will be described with reference to FIG. 6. The electric hair dryer according to the second embodiment basically has the same structure as the electric hair dryer 1 according to the first embodiment. However, the second end portion BEA and the fourth end portion BEB of the plurality of stationary wings 12 overlap each other in the extending direction. Different from implementation mode 1. In FIG. 6, similarly to FIG. 3, the first portion 12A and the second portion 12B that are superimposed and projected onto a plane parallel to the first cross section and the second cross section are shown.

As shown in FIG. 6, the electric hair dryer according to the embodiment 2 is also similar to the electric hair dryer 1 in that the entrance setting angle of the cross section on the side close to the first surface 11A (see FIG. 1) is farther from the first surface. The entrance setting angle of the cross section of the other side of 11A is small.

As shown in FIG. 6, regarding the first portion 12A, the first tangent line TFA and the ninth tangent line T4 are considered. The first tangent line TFA is a tangent line that passes through the first centerline CLA of the first portion 12A of the first end portion FEA. The ninth tangent line T4 is a tangent line that passes through the first end FEA and passes through the center O of rotation O and passes through the fifth arc CI4 of the first end FEA. A third entry setting angle θ _IA is formed between the first tangent line TFA and the ninth tangent line T4 on the first cross section.

As shown in FIG. 6, regarding the second portion 12B, a third tangent TFB and a tenth tangent T5 are considered. The third tangent line TFB is a tangent line that passes through the second center line CLB of the second portion 12B of the third end portion FEB. The tenth tangent line T5 is a tangent line that passes through the third end FEB and passes the center of rotation O as the center and passes the sixth arc CI5 of the third end FEB. A fourth entry setting angle θ _IB is formed between the third tangent line TFB and the tenth tangent line T5 on the second cross section.

As shown in FIG. 6, regarding the first portion 12A, a fifth tangent line TBA and an eleventh tangent line T6 are considered. The fifth tangent line TBA is a tangent line that passes through the first center line CLA of the second end BEA. The eleventh tangent line T6 is a tangent line passing through the second end BEA and centering the rotation center O and passing through the seventh arc CI6 of the second end BEA. A third exit installation angle θ _OA is formed between the fifth tangent line TBA and the eleventh tangent line T6 in the first cross section.

As shown in FIG. 6, regarding the second portion 12B, a seventh tangent TBB and a twelfth tangent T6 are considered. The seventh tangent line TBB is a tangent line that passes through the second center line CLB of the fourth end portion BEB. The twelfth tangent line T6 passes through the fourth end portion BEB, and the tangent line passes through the center of rotation O as the center and passes through the eighth arc CI6 of the fourth end portion BEB. The twelfth tangent line overlaps the eleventh tangent line T6 when viewed from the extension direction. Therefore, it is indicated by T6 in FIG. 6. The eighth arc overlaps the seventh arc CI6 when viewed from the extension direction. Therefore, the sixth arc is represented by CI6 in FIG. 6. A fourth exit setting angle θ _OB is formed between the seventh tangent line TBB and the twelfth tangent line T6 on the second cross section.

As shown in FIG. 6, each of the plurality of stationary wings 12 constitutes a third entrance installation angle θ _IA smaller than a fourth entrance installation angle θ _IB . Each of the plurality of stationary wings 12 constitutes a third exit installation angle θ _OA that is smaller than a fourth exit installation angle θ _OB . In the plurality of static wings 12, the second end portion BEA and the fourth end portion BEB of the plurality of static wings 12 overlap with each other in the extending direction. In the plurality of static wings 12, the first end portion FEA is formed rearward in the rotation direction than the third end portion FEB, and is formed on the outer side in the radial direction.

Therefore, the electric hair dryer of the second embodiment can achieve the same effect as the electric hair dryer 1.

    Implementation type 3    

An electric hair dryer according to a third embodiment will be described with reference to FIGS. 7 and 8. The electric hair dryer according to the third embodiment basically has the same structure as the electric hair dryer 1 according to the first embodiment, but the cross-sectional shape of the plurality of stationary blades 12 is different from that of the electric hair dryer 1.

As shown in FIG. 7 and FIG. 8, in a cross section perpendicular to the extending direction, the center of curvature of the outer shape line on the one side in the rotation direction of each of the plurality of stationary blades 12 is located more than the outer shape of that side The line is closer to the profile line side on the other side. In the above-mentioned section, the center of curvature of the contour line on the other side in the rotation direction of each of the plurality of static wings 12 is located on the contour line side of the one side than the contour line on the other side.

For example, the first portion 12A has a center of curvature of the outer contour line A1 located forward in the rotation direction, and is located further to the rear side than the outer contour line A1 in the rotation direction. The center of curvature of the outer shape line B1 that is located forward in the rotation direction of the second portion 12B is located further to the rear side than the outer shape line B1 in the rotation direction. In other words, a surface of the plurality of stationary blades 12 that is located forward of the rotation direction and extends from the inner peripheral end portion to the outer peripheral end portion has a convex shape that faces forward in the rotation direction.

The first portion 12A has a center of curvature of an outer shape line A2 located rearward in the rotation direction, and is located further forward than the outer shape line A2 in the rotation direction. The center of curvature of the outer line B2 of the second portion 12B, which is located rearward in the rotation direction, is located further forward than the outer line B2 in the rotation direction. In other words, a surface of the plurality of stationary blades 12 that is located rearward in the rotation direction and extends from the inner peripheral end portion to the outer peripheral end portion is formed in a convex shape toward the rear in the rotational direction. The distance between the contour line of the stationary blade 12 located in the forward direction in the rotation direction and the contour line located in the rear direction, in other words, the thickness of the stationary blade 12 is the thickest at the central portion in the radial direction.

By doing so, the gas flow shown by the dotted arrows and the realization arrows in FIG. 8 can be realized. As a result, in the electric hair dryer according to Embodiment 3, the center of curvature of the outer shape line A1 located in the forward direction in the rotation direction is closer to the front side in the rotation direction than the outer shape line A1 in the first portion 12A. Downward (refer to FIG. 3), flow separation at the exit side (outer peripheral side) of the flow path formed between the plurality of stationary blades 12 is suppressed. As a result, in the electric hair dryer according to the third embodiment, the ventilation resistance of the flow path formed between the plurality of static wings 12 is reduced, and the rate of increase in static pressure is increased, so that the efficiency is high.

    Implementation type 4    

An electric hair dryer according to a fourth embodiment will be described with reference to FIGS. 9 to 12. The electric hair dryer according to the fourth embodiment basically has the same structure as the electric hair dryer 1 according to the first embodiment. However, the rate of change in the inlet setting angle of each of the plurality of stationary wings 12 is determined by the position in the extending direction. This is different. The horizontal axis of FIG. 9 shows the position of the plurality of stationary blades 12 in the above-mentioned extending direction, and the vertical axis of FIG. 9 shows the above-mentioned setting angle of the position. The horizontal axis of FIG. 10 shows the position of the plurality of stationary blades 12 in the extending direction, and the vertical axis of FIG. 10 shows the exit installation angle at the position.

The rate of change of the entrance setting angle described above shows a tendency in FIG. 9. For example, the rate of change of the entrance installation angle between the first section and the third section is the difference between the entrance installation angle on the first section and the entrance installation angle on the third section, relative to the above. The ratio of the distance between the first cross section and the third cross section in the extending direction is calculated.

The change in the change rate of the inlet installation angle described above shows the tendency in FIG. 9. For example, the rate of change of the entrance installation angle between the third section and the second section is the difference between the entrance installation angle on the third section and the entrance installation angle on the second section, relative to the above. The ratio of the distance between the third cross section and the second cross section in the extending direction is calculated. The rate of change of the entrance installation angle between the third section and the second section is different from the rate of change of the entrance installation angle between the first section and the third section.

The rate of change of the entrance setting angle is set based on the speed distribution shown in FIG. 5. For example, the rate of change of the entrance setting angle near the first surface 11A side in the extension direction is larger than the rate of change of the entrance installation angle away from the first surface 11A side in the extension direction. E.g. The rate of change of the entrance setting angle between the first section and the third section is larger than the rate of change of the entrance setting angle between the third section and the second section. By setting the change rate of the entrance installation angle based on the speed distribution, the collision loss at the inner peripheral end portion of the stationary blade 12 can be more effectively reduced.

The rate of change of the inlet setting angle shows the tendency of the curve in FIG. 10. For example, the rate of change of the exit setting angle between the first section and the third section is the difference between the exit setting angle on the first section and the exit setting angle on the third section, relative to The ratio of the distance between the first cross section and the third cross section in the extending direction is calculated.

The change in the change rate of the exit installation angle described above shows the tendency in FIG. 10. For example, the rate of change of the exit setting angle between the third section and the second section is different from the rate of change of the exit setting angle between the first section and the third section.

The rate of change of the exit setting angle is set based on the speed distribution shown in FIG. 5. For example, the rate of change of the exit setting angle near the first surface 11A side in the extension direction is larger than the rate of change of the exit installation angle away from the first surface 11A side in the extension direction. E.g. The rate of change of the exit setting angle between the first section and the third section is larger than the rate of change of the exit setting angle between the third section and the second section. By setting the rate of change of the exit installation angle based on the speed distribution, the ventilation resistance between the gaps 21 can be reduced more effectively.

The electric hair dryer according to the fourth embodiment having the above-mentioned structure has high efficiency. The change tendency of the change rate of the inlet installation angle and the change tendency of the change rate of the outlet installation angle can be arbitrarily set in accordance with the speed distribution.

The rate of change of the entrance installation angle on the side of the first surface 11A in the extending direction may be smaller than the rate of change of the entrance installation angle on the side of the first surface 11A in the extension direction. In this case, the portion of the stationary blade 12 located on the inner peripheral side in the radial direction has a cross-sectional shape as shown in FIG. 11. The rate of change of the exit setting angle on the side of the first surface 11A in the extending direction may be smaller than the rate of change of the exit setting angle on the side of the first surface 11A away from the first surface. In this case, the portion of the stationary blade 12 located on the outer peripheral side in the radial direction has a cross-sectional shape as shown in FIG. 12.

    Implementation type 5         <Structure of Electric Vacuum Cleaner>    

The electric vacuum cleaner 100 according to the fifth embodiment will be described with reference to FIG. 13. The electric vacuum cleaner 100 includes at least one of the electric hair dryers of Embodiments 1 to 3. The electric vacuum cleaner 100 includes, for example, an electric vacuum cleaner body 101, a suction tool 104, a dust collection unit 105, and the electric hair dryer 1 described above. The electric vacuum cleaner 101 is provided with a discharge port 107. The suction tool 104 is connected to the electric vacuum cleaner body 101 through a pipe 102 and an extension pipe 103 serving as a pipeline, and sucks air in a part to be cleaned. The tube 102 is connected to the electric cleaner body 101. The extension tube 103 is connected to the front end side of the tube 102. The suction tool 104 is connected to a front end portion of the extension tube 103.

The dust collection unit 105 is provided inside the electric vacuum cleaner body 101 and communicates with the suction tool 104 to store dust of the sucked air. The electric hair dryer 1 is provided inside the electric vacuum cleaner 101 and sucks air from the suction tool 104 to the dust collection unit 105. The electric hair dryer 1 is the electric hair dryer according to the embodiment of the present invention described above. The exhaust port 107 is provided at the rear of the electric cleaner body 101 and exhausts the air collected by the dust collecting unit 105 to the outside of the electric cleaner body 101.

A rear wheel 108 is arranged on the side of the electric cleaner body 101 on the rear side in the running direction. A front wheel (not shown) is provided on the lower side of the electric cleaner body 101 on the front side in the running direction.

    <Operation of Electric Vacuum Cleaner>    

Next, the operation of the electric vacuum cleaner will be described with reference to FIG. 13. In the electric vacuum cleaner configured as described above, when power is supplied to the electric section 2 of the electric hair dryer 1, the rotating shaft 5 (see FIG. 1) is rotated. As shown in FIG. 1, by the rotation of the rotating shaft 5, the telecentric impeller 6 fixed to the rotating shaft 5 rotates and sucks air from the suction port 17. Thereby, through the pipe 102, the extension pipe 103, and the suction tool 104 connected to the electric cleaner body 101 shown in FIG. 13, the air to be cleaned is sucked into the electric cleaner body 101. The air sucked into the electric vacuum cleaner body 101 is collected in the dust collection unit 105.

After that, the air discharged from the dust collecting unit 105 is sucked from the suction port 17 of the electric hair dryer 1 as shown in FIG. 1. The air sucked into the electric hair dryer 1 is boosted, accelerated, swiveled by the telecentric impeller 6, and advances radially outward. Most of the air discharged from the telecentric impeller 6 is decelerated and boosted between the wings of the plurality of stationary wings 12. After that, the air is discharged from the discharge port 16 and the discharge port 20 to the outside of the electric blower 1. Then, the air is discharged to the outside of the electric cleaner body 101 from the discharge port 107 provided in the electric cleaner body 101 shown in FIG. 13.

    <Effects of electric vacuum cleaner>    

Since the electric vacuum cleaner 100 uses the high-efficiency electric hair dryer 1, it is possible to obtain an electric vacuum cleaner having a high suction work rate.

In addition, the electric vacuum cleaner 100 may be provided with the electric hair dryer of Embodiments 2 to 4. This can also improve the suction work rate of the electric vacuum cleaner 100.

In addition, as the electric vacuum cleaner 100, the cylindrical vacuum cleaner in which the electric vacuum cleaner body 101 is connected to the tube 102 and the extension pipe 103 has been described, but other types of electric vacuum cleaners may be used. For example, an electric hair dryer of any of Embodiments 1 to 4 described above can be applied to a wireless electric vacuum cleaner or a stick-type electric vacuum cleaner to which an electric vacuum cleaner body is connected to an extension pipe.

    Implementation type 6         <Structure of the dryer>    

Next, the dryer 110 according to the fifth embodiment will be described with reference to FIG. 14. The dryer 110 includes at least one of the electric hair dryers of the implementation modes 1 to 3. The dryer 110 includes, for example, an electric hair dryer 1, a casing 111 as a main body, a hand insertion portion 112, a water receiving portion 113, an air inlet 114, and a nozzle 115. The hand dryer includes an electric hair dryer 1 in a casing 111. In the hand dryer, by inserting a hand into the hand insertion portion 112 located above the water receiving portion 113, the wind from the electric hair dryer 1 blows water away from the hand. The blown water is stored from the water receiving section 113 to a water-drawing container (not shown).

The casing 111 forming the casing of the hand dryer has a hand insertion opening on the front side. The housing 111 includes a hand insertion portion 112 as a processing space for continuing the hand insertion opening. The hand insertion portion 112 allows a user to insert a hand. The hand insertion portion 112 is formed in the lower portion of the front surface of the casing 111 and forms an open groove-shaped recessed portion that is open at the front and both sides. The water receiving portion 113 is configured to form a lower portion of the hand insertion portion 112. The upper part of the hand insertion part 112 is provided with the nozzle 115 which blows high-speed air toward the hand insertion part 112 downward. An air inlet 114 is provided under the casing 111.

The inner space of the casing 111 is provided with an electric hair dryer 1. This electric hair dryer 1 is driven by, for example, electric power supplied from the outside or electric power supplied from a power source such as a battery disposed inside the casing 111. In this space, there are provided an intake air passage that communicates with the intake side of the electric hair dryer 1 and an intake port 114 provided on the side of the casing 111, and an exhaust air that communicates with the exhaust side of the electric hair dryer 1 and the nozzle 115. road.

A heater may be provided near the upstream side of the exhaust air passage than the nozzle 115 to heat and warm the air discharged from the electric blower 1. Further, a circuit board including a hand sensor and an LED for lighting may be provided on the back side of the nozzle 115 serving as a blow-out port and inside the housing 111. The hand sensor detects the presence or absence of a hand in the hand insertion portion 112. When a hand insertion is detected in the hand insertion portion 112, an illumination LED as a lighting means illuminates the hand insertion portion 112.

    <Operation of the dryer>    

Next, the operation when used for drying hands will be described. When the power switch of the electric appliance used as the hand dryer is turned on, a control circuit or the like disposed in the casing 111 is energized, and a handy state (hereinafter referred to as a standby state) capable of drying hands is obtained. Then, the user inserts a wet hand from the hand insertion mouth until the vicinity of the wrist enters the hand insertion portion 112, and the hand sensor detects the insertion of the hand. As a result, the control circuit makes the electric hair dryer operate.

When the electric hair dryer 1 operates, air outside the dryer is sucked in through the air inlet 114. The air sucked from the suction port 114 is sucked into the suction side of the electric hair dryer 1. The electric blower 1 converts air sucked from the intake side to high-pressure air and exhausts it from the exhaust side. The exhausted high-speed air reaches the nozzle 115 through the exhaust air path, and is converted into a high-speed air flow having high motion energy. The high-speed air flow is blown downward from the nozzle 115 into the hand insertion portion 112. The high-speed air stream blown from the nozzle 115 hits the wet hand inserted into the hand insertion portion 112, and peels off the moisture attached to the hand from the surface of the hand and blows away. In this way, you can dry your hands. In addition, when a heater switch (not shown) provided in the housing 111 is turned on, the heater is energized and high-pressure air passing through the exhaust air passage is heated. Therefore, warm air is blown from the nozzle, and a good user feeling can be maintained even in winter and the like.

After the hand drying process is completed, the hand is extended from the hand insertion portion 112, the hand sensor detects the detachment of the hand, and the electric hair dryer is stopped. The water droplets blown from the hand are accommodated in the water receiving portion 113 of the forward tilt structure.

    <The effect of the dryer>    

The above-mentioned dryer 110 uses the above-mentioned high-efficiency electric hair dryer 1 and thus has high efficiency.

In addition, the dryer 110 may use an electric hair dryer of the second to fourth embodiments. In this way, the hand dryer 110 also has high efficiency.

The embodiments of the present invention have been described above, but the above embodiments can be modified in various ways. The scope of the present invention is not limited to the aforementioned embodiments. The scope of the present invention is expressed by the scope of the patent application, and all changes within the scope are included in the present invention in a meaning that is equal to the scope of the patent application.

    Industrial availability    

The present invention can be advantageously applied to a machine using a telecentric electric hair dryer, such as a household or business electric vacuum cleaner, a hand dryer, or the like.

Claims (10)

    An electric hair dryer includes: an electric part including a motor and a rotating shaft rotated by the motor; a telecentric impeller connected to the rotating shaft; a main board disposed between the electric motor and the telecentric impeller; and a plurality of static wings, and The extension direction of the rotation axis intersects the telecentric impeller, and the main board has a first surface extending in the intersection direction and located on the telecentric impeller side in the extension direction. Each of the plurality of static wings One is connected to the first surface, the centerline of each of the plurality of static wings on a section perpendicular to the extension direction has an inner peripheral end portion located closest to the rotation axis and located farthest from the The outer peripheral end portion of the position of the rotation shaft, each of the plurality of static wings has an entrance setting angle, the entrance setting angle being a tangent line passing through the center line of the inner peripheral end portion, and passing through the inner peripheral end portion and the A tangent line tangential to the arc at the inner peripheral end with the rotation axis as the center, and the angle formed by the two tangent lines. In each of the plurality of static wings, the first The entrance setting angle on the first cross section is smaller than the entrance setting angle on the second cross section perpendicular to the extending direction, and is located farther from the first surface than the first cross section.         The electric hair dryer according to item 1 of the patent application scope, wherein each of the plurality of static wings has an exit setting angle, the exit setting angle being a tangent line passing through the centerline of the outer peripheral end portion and passing through the outer peripheral end portion Tangent to the arc centered on the axis of rotation and passing through the peripheral end, the angle formed by these two tangents, each of the plurality of static wings on the first section The exit installation angle is smaller than the exit installation angle on the second cross section.         The electric hair dryer according to item 1 or 2 of the scope of patent application, wherein, in a cross section perpendicular to the extending direction, each of the plurality of stationary blades has a contour line on one side in the rotation direction of the telecentric impeller and The contour line on the other side is slightly arc-shaped.         The electric hair dryer according to item 3 of the scope of patent application, wherein the center of curvature of the contour line of the one side is located closer to the contour line of the other side than the contour line of the one side, The center of curvature is located on the contour line side of the other side than the contour line of the other side.         The electric hair dryer according to item 1 of the scope of patent application, wherein the external shape of the main board is slightly circular when viewed from the extending direction.         The electric hair dryer according to item 1 of the patent application scope, wherein an outer diameter of the plurality of static wings is larger than an outer diameter of the main plate.         The electric hair dryer according to item 1 of the scope of patent application, wherein each of the plurality of static wings is located between the first section and the second section and on a third section perpendicular to the extending direction. The entrance installation angle exceeds the entrance installation angle on the first section, but is not satisfied with the entrance installation angle on the second section.         The electric hair dryer according to item 7 of the scope of patent application, wherein a difference between the entrance setting angle on the first section and the entrance setting angle on the third section is relative to the first section and the third section. The ratio of the distance of the section in the extension direction is different from the entrance setting angle on the third section and the entrance setting angle on the second section with respect to the third section and the second section. The ratio of the distances in the extending direction is different.         An electric vacuum cleaner includes: an electric vacuum cleaner body; a suction device connected to the electric vacuum cleaner body by a pipe to attract air at a part to be cleaned; a dust collecting part is provided inside the electric vacuum cleaner body and communicates with the suction tool to store The dust of the sucked air; and the electric hair dryer as described in the first item of the patent application scope, which is arranged inside the electric vacuum cleaner body and draws air from the suction tool to the dust collecting part, wherein the electric vacuum cleaner body is outside, A discharge port is provided to discharge the air collected by the dust collection unit to the outside of the electric cleaner body.         A hand dryer includes a main body including a hand insertion portion, which is an opening portion where a user inserts a hand; and the electric hair dryer according to item 1 of the scope of patent application, which is disposed inside the main body, The body is formed with an air inlet for the electric hair dryer to suck in external air, and an air outlet for blowing out the external air sent from the electric hair dryer toward the hand insertion portion.