Impeller and electronic apparatus

Abstract

To provide an impeller which can achieve improvement of ventilation efficiency and reduction of noise, and to provide an electronic device.SOLUTION: An impeller 100 includes: a plurality of blades 101; an annular inner periphery part 102 disposed at the inner side of the blades 101; and a flat plate-like base 110 connecting the annular inner periphery part 102 with the blades 101. The flat plate-like base 110 includes: a frame 111 connected to the blades 101; and a plurality of spokes 112 extending from the frame 111 to the annular inner periphery part 102. An electronic device 1 includes the impeller 100, a motor M, and a housing 30.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to an impeller and an electronic device, and more particularly to an impeller and an electronic device including the impeller. [Background technology]

[0002] As an electronic device equipped with an impeller, for example, the electronic device described in Patent Document 1 is known. The electronic device described in Patent Document 1 is a blower, so-called a sirocco fan or a blower. The impeller mounted on this electronic device includes a plurality of blades extending along the direction of the rotation shaft of the motor, and an impeller body that is a circular, ring-shaped plate-like member. The plurality of blades are attached to the outer peripheral side portion of the impeller body along the circumferential direction of the impeller body. The rotation shaft of the motor is disposed inside the impeller body. In addition, a plurality of holes are formed between the inner peripheral surface of the impeller body and the portion to which the plurality of blades are attached, that is, in the approximately central portion in the radial direction of the impeller body, penetrating the impeller body in the direction of the rotation shaft. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2006-137141 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, in electronic devices (blower) such as that described in Patent Document 1 above, there is a demand for improving the blowing efficiency and for suppressing noise generated when the impeller hits the blades against the wind passing through the above-mentioned holes in the impeller body as the impeller rotates.

[0005] Therefore, an object of the present invention is to provide an impeller and an electronic device that can achieve improved air blowing efficiency and reduced noise. [Means for solving the problem]

[0006] The impeller of the present invention comprises a plurality of blades, an annular inner periphery arranged inside the plurality of blades, and a flat base connecting the annular inner periphery and the plurality of blades, the flat base including a frame connecting the plurality of blades and a plurality of spokes extending from the frame toward the annular inner periphery.

[0007] Such an impeller may further include at least one of the following features.

[0008] An opening may be provided between two adjacent spokes among the plurality of spokes, in which case a portion of the opening on the side of the plurality of blades may protrude toward the plurality of blades.

[0009] A width of the spokes on the blade side may be greater than a width of the spokes on the annular inner peripheral portion side.

[0010] The spokes may be arranged in non-rotationally symmetric positions relative to the vanes.

[0011] The number of the plurality of spokes and the number of the plurality of vanes may be different.

[0012] The above-mentioned impeller may have an annular outer periphery, and the plurality of blades may be connected to the annular outer periphery.

[0013] The plurality of blades may have a shape whose longitudinal direction is the axial direction, and the annular inner peripheral portion may have a cylindrical shape.

[0014] Moreover, an electronic device according to the present invention includes the above-mentioned impeller, a motor, and a housing. [Brief description of the drawings]

[0015] [Figure 1]1 is a perspective view illustrating an example of an electronic device according to an embodiment of the present invention. [Diagram 2] 2 is a plan view of a housing of the electronic device shown in FIG. 1, as viewed from one side in the axial direction. [Diagram 3] 3 is a cross-sectional view taken along the axial direction of the housing shown in FIG. 2, with a portion thereof being simplified. [Figure 4] FIG. 2 is a perspective view showing an impeller according to an embodiment of the present invention. [Diagram 5] 5 is a plan view of the impeller shown in FIG. 4 as viewed from one side in the axial direction. [Figure 6] 5 is a bottom view of the impeller shown in FIG. 4 as viewed from the other axial side. [Figure 7] 5 is a front view of the impeller shown in FIG. 4 as viewed from one radial direction. [Figure 8] FIG. 5 is a cross-sectional view along the axial direction of the impeller shown in FIG. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, embodiments for carrying out the impeller and electronic device according to the present invention will be illustrated with reference to the accompanying drawings. The embodiments illustrated below are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The present invention can be modified or improved from the following embodiments without departing from the spirit of the present invention. In addition, in the above-mentioned attached drawings, the dimensions of each component may be exaggerated or reduced, or hatching may be omitted, in order to facilitate understanding.

[0017] Fig. 1 is a perspective view showing an example of an electronic device according to the present embodiment. As shown in Fig. 1, the electronic device 1 according to the present embodiment is a dryer. The electronic device 1 includes a handle 10, a base 20, a housing 30, and a nozzle 40.

[0018] The handle 10 is a part that the user holds in his / her hand when using the electronic device 1, and is a rod-shaped member having a predetermined length. Although not shown, the handle 10 is provided with operating parts such as a power switch and an operating switch. The handle 10 has a circular or elliptical cross-sectional shape, and has an outer shape in which the central part is more bulging than both ends in the longitudinal direction of the handle 10. The handle 10 is attached integrally to the base 20. However, this is not limited thereto, and the handle 10 may be attached to the base 20 in a detachable manner, or may be attached in a foldable manner.

[0019] The base 20 is a member on which the housing 30 and a part of the nozzle 40 are placed. The base 20 has a curved planar shape, and more specifically, has a horseshoe shape in plan view. The base 20 is a plate-like member having a predetermined thickness (length in the longitudinal direction of the handle 10) and is formed of metal, resin, or the like. In the longitudinal direction of the handle 10, the entire housing 30 and the introduction part 41 of the nozzle 40 are placed on an end face 20a on one side of the base 20. The introduction part 41 is a part of the nozzle 40 on the housing 30 side. On the other hand, in the longitudinal direction of the handle 10, the handle 10 is attached to an end face 20b on the other side of the base 20. Various electronic components are accommodated inside the base 20. These electronic components include a circuit board electrically connected to the impeller 100 described later and a heater (not shown) provided in the space inside the nozzle 40.

[0020] The housing 30 is a cylindrical member made of metal, resin, etc. The housing 30 has a cylindrical housing main body 31 and an outlet portion 32 integrally joined with the housing main body 31.

[0021] In the longitudinal direction of the handle 10, the housing body 31 has an opening 31h with a diameter smaller than the outer shape (for example, the outer diameter) of the housing body 31 on the opposite side to the base 20 side. Air outside the electronic device 1 is introduced into the inside of the housing 30 through the opening 31h of the housing body 31. In this way, the opening 31h functions as an air suction port for the electronic device 1. The opening 31h is formed integrally with the three spokes 31u, and gas flows into the inside of the housing 30 through the gaps between the three spokes 31u. These three spokes 31u extend so as to cross the opening 31h. Note that a mesh-like net-like member (not shown) may be attached to the opening 31h to prevent fingers or the like from entering between the three spokes 31u. In addition, the number of spokes 31u is not limited to three, and may be any number as long as it is more than one.

[0022] FIG. 2 is a plan view of the housing 30 as viewed from one side (the opening 31h side) in the longitudinal direction of the handle 10. Note that in FIG. 2, the three spokes 31u are omitted. As shown in FIG. 2, an impeller 100 is provided in the space inside the housing main body 31. In this embodiment, the impeller 100 is a so-called sirocco fan. That is, as the impeller 100 rotates, air outside the electronic device 1 flows into the inside of the housing main body 31 through the opening 31h. This flowed-in air is converted into a fluid having a predetermined level of wind pressure and air volume (hereinafter referred to as "wind AR") by the impeller 100 rotating, for example, counterclockwise as viewed from one side in the longitudinal direction of the handle 10.

[0023] The outlet portion 32 is a portion that connects the housing body 31 and a nozzle 40, which will be described later. The nozzle 40 is attached to an end face 32a of the outlet portion 32 opposite to the housing body 31. When the impeller 100 rotates, the wind AR flows inside the outlet portion 32 toward the end face 32a.

[0024] 1 again, the nozzle 40 is attached to the end surface 32a of the outlet portion 32. The direction in which the outlet portion 32 extends is parallel to the longitudinal direction of the nozzle 40. The wind AR flows through the outlet portion 32 inside the nozzle 40 along the longitudinal direction of the nozzle 40. In other words, the longitudinal direction of the nozzle 40 is the flow direction X of the wind AR.

[0025] The nozzle 40 is a cylindrical member made of resin or the like. The nozzle 40 heats the wind AR flowing in from the outlet portion 32 of the housing 30 with a heater (not shown) provided in the inner space, and discharges the wind AR to the outside as hot air. The nozzle 40 has an introduction portion 41 connected to the outlet portion 32 of the housing 30, and a nozzle main body portion 42 formed integrally with the introduction portion 41.

[0026] The introduction portion 41 has an end face 41a that is coupled to the end face 32a of the outlet portion 32 of the housing 30. The introduction portion 41 has a cylindrical truncated cone shape or a cylindrical approximately truncated cone shape. The width of the introduction portion 41 (the length in the direction perpendicular to the flow direction X and the longitudinal direction of the handle 10) gradually increases from the end face 41a toward the nozzle main body 42. The introduction portion 41 has an end face 41b that has the same outer shape (e.g., outer diameter) as the outer shape (e.g., outer diameter) of the end face 42a of the nozzle main body 42 on the housing 30 side.

[0027] The nozzle body 42 is a cylindrical or substantially cylindrical member made of resin or the like. The width of the nozzle body 42 gradually decreases toward the opening 42b on the opposite side of the housing 30 in the flow direction X. That is, in this embodiment, the diameter of the opening 42b is slightly smaller than the diameter of the end face 42a of the nozzle body 42. The hot air AR is discharged to the outside from the opening 42b. Therefore, the opening 42b functions as an outlet of the electronic device 1.

[0028] Next, the impeller 100 and the motor M will be described in detail.

[0029] FIG. 3 is a cross-sectional view of the housing 30 cut along the longitudinal direction of the handle 10, and shows a simplified view of a part of the housing 30 and the like. As shown in FIG. 3, the impeller 100 and the motor M are housed inside the housing 30. The shaft 16 is disposed in the center of the space inside the impeller 100. The shaft 16 extends parallel to the longitudinal direction of the handle 10 (see FIG. 1). Hereinafter, the direction in which the shaft 16 extends is referred to as the "axial direction". The opening 31h (air suction port) of the housing 30 is formed on one side surface of the housing 30 in the axial direction. Hereinafter, the opening 31h side in the axial direction may be referred to as the "upper" side for convenience, and the opposite side of the opening 31h side in the axial direction may be referred to as the "lower" side for convenience.

[0030] FIG. 4 is a perspective view of the impeller 100 as viewed from one side in the axial direction. FIG. 5 is a plan view of the impeller 100 as viewed from one side in the axial direction. FIG. 6 is a bottom view of the impeller 100 as viewed from the other side in the axial direction. FIG. 7 is a front view of the impeller 100 as viewed from one direction in the radial direction perpendicular to the axial direction. FIG. 8 is a cross-sectional view of the impeller 100 along the axial direction. In this embodiment, when the impeller 100 is viewed from the radial direction, it can be seen in the same way from any direction in the radial direction. That is, the rear view, right side view, and left side view of the impeller 100 are the same as the front view.

[0031] As shown in Figures 4 to 8, the impeller 100 has a generally cylindrical shape extending in the axial direction. The impeller 100 includes a plurality of blades 101, an inner peripheral portion 102, a base 110, and an outer peripheral portion 103. The inner peripheral portion 102, the base 110, and the outer peripheral portion 103 are formed concentrically. Each component of the impeller 100, such as the plurality of blades 101, the inner peripheral portion 102, the base 110, and the outer peripheral portion 103, may be integrally molded using, for example, resin or the like.

[0032] The inner peripheral portion 102 is a portion of the impeller 100 that is on the inner peripheral side in the radial direction of the impeller 100. The inner peripheral portion 102 has a cylindrical shape and is annular when viewed from the axial direction, more specifically, is annular.

[0033] As shown in FIG. 8, in this embodiment, the inner peripheral portion 102 is formed in a stepped shape and includes a cylindrical portion 102B extending along the axial direction and a top portion 102A extending radially inward from the upper end of the cylindrical portion 102B in the axial direction. The cylindrical portion 102B includes, from top to bottom, a small diameter portion 102B1, an expanded diameter portion 102B2, and a large diameter portion 102B3. The top portion 102A is connected to the upper end of the small diameter portion 102B1. The connection portion between the small diameter portion 102B1 and the top portion 102A is a portion 102Fc inclined at an angle of approximately 45°. The expanded diameter portion 102B2 is formed so that the diameter expands from the top to the bottom. The small diameter portion 102B1 is connected to the upper end of the expanded diameter portion 102B2, and the large diameter portion 102B3 is connected to the lower end of the expanded diameter portion 102B2.

[0034] 3, the shaft 16 is inserted axially into a space inside the inner circumferential portion 102 formed by an inner circumferential surface 102a1 of the top portion 102A of the inner circumferential portion 102 and an inner circumferential surface 102b1 of the cylindrical portion 102B, and is supported by the top portion 102A via a connecting portion 17. Note that the connecting portion 17 may be integrally formed with the inner circumferential portion 102.

[0035] As shown in FIG. 3, the motor M is housed inside the inner periphery 102 of the impeller 100. The motor M is disposed between the cylindrical portion 102B of the inner periphery 102 and the shaft 16 in the radial direction of the impeller 100. The motor M includes a rotor 21, a bearing housing 23, two bearings 24, 24, and a stator 25. The bearing housing 23 is integrally formed on the lower surface 31d of the housing 30. The bearing housing 23 is formed in a cylindrical shape, and the two bearings 24, 24 are supported inside the bearing housing 23 in a state separated from each other in the axial direction. The shaft 16 is disposed inside the inner rings of the two bearings 24, 24. The stator 25 is fixed to the outer periphery surface of the bearing housing 23. The stator 25 includes a stator core 26 fixed to the outer periphery surface of the bearing housing 23 and a plurality of coils 27 wound around the stator core 26. The rotor 21 includes a connection portion 17, an inner circumferential portion 102, and a magnet 22 fixed to an inner circumferential surface 102b1 of a cylindrical portion 102B of the inner circumferential portion 102. The rotor 21 and the shaft 16 rotate relative to the stator 25 due to magnetic interaction between the coil 27 of the stator 25 and the magnet 22 of the rotor 21. The inner circumferential portion 102 functions as a rotor core of the rotor 21, and the rotation of the inner circumferential portion 102 rotates the base 110 and the multiple blades 101. In this manner, the impeller 100 is rotated by the motor M.

[0036] As shown in FIG. 6, a surface 102Bb on the other side of the cylindrical portion 102B in the axial direction (i.e., the lower surface 102Bb of the inner peripheral portion 102) is provided with a plurality of recesses 102Bc recessed upward from the lower surface 102Bb by a predetermined length from the position of the inner peripheral surface 102b1 of the cylindrical portion 102B to a roughly middle position in the radial direction of the lower surface 102Bb. These recesses 102Bc are formed at roughly equal intervals over the entire length of the lower surface 102Bb in the circumferential direction. By forming such recesses 102Bc, it is possible to reduce the weight of the inner peripheral portion 102 while maintaining the strength of the inner peripheral portion 102. In addition, it is possible to ensure the balance of the impeller 100 by placing a weight (member) in the recesses 102Bc.

[0037] As shown in Figs. 4 to 6, the base 110 is formed in a flat, annular shape and extends in the radial direction. The base 110 is connected to the outer circumferential surface of the tube portion 102B of the inner circumferential portion 102. More specifically, an inner peripheral edge 110b of the base 110 is connected to an outer circumferential surface 102B3a of the large diameter portion 102B3 of the outer circumferential surface of the tube portion 102B. A plurality of blades 101 are connected to an outer circumferential edge 110C of the base 110. That is, the flat base 110 connects the annular inner circumferential portion 102 and the plurality of blades 101.

[0038] The base 110 is formed with a plurality of recesses 110a cut out from the position of the inner peripheral edge 110b to a predetermined position in the radial direction of the base 110. In each of the recesses 110a, an end 110a1 on the outer peripheral side (the outer peripheral edge 110C side) of the recess 110a is located inside the outer peripheral edge 110C of the base 110. In this embodiment, each of these recesses 110a is formed with the same shape and size, and is formed at equal intervals over the entire length in the circumferential direction of the base 110. Note that the multiple recesses 110a do not have to be formed with the same shape and size, and do not have to be formed at equal intervals over the entire length in the circumferential direction of the base 110.

[0039] The outer peripheral side (outer peripheral edge 110C side) of the recess 110a is formed so as to protrude toward the side of the plurality of blades 101 when viewed from the axial direction. In this embodiment, the recess 110a is composed of a first portion 110a2 having a rectangular area and a second portion 110a3 having a triangular (e.g., isosceles) area including an end portion 110a1 on the outer peripheral side (outer peripheral edge 110C side), and the recess 110a is formed in a shape having a pentagonal area. More specifically, in the radial direction, the recess 110a is formed so that an end portion 110a1 of the second portion 110a3 protrudes toward the side of the plurality of blades 101. This end portion 110a1 is a portion that forms an obtuse angle. In the base 110 of this embodiment, an opening H surrounded by the recess 110a and the outer peripheral surface 102B3a of the inner peripheral portion 102 is formed. The opening H formed in the base 110 reaches the inner peripheral edge 110b of the base 110. The opening H includes a rectangular first region H1 defined by the first portion 110a2 and a triangular (for example, isosceles) second region H2 defined by the second portion 110a3. The second region H2 protrudes toward the outer peripheral side (the side of the plurality of blades 101) of the impeller 100 toward the end 110a1 on the outer peripheral side of the recess 110a. That is, when viewed from the axial direction, the outer peripheral side (the outer peripheral edge 110C side) of the opening H is formed to protrude toward the side of the plurality of blades 101. Thus, in this embodiment, the opening H includes the second region H2 protruding toward the outer peripheral edge 110C side, so that the opening H is expanded toward the outer peripheral edge 110C side.

[0040] Focusing on two openings H adjacent to each other in the circumferential direction of the base 110, the first portion 110a2 of the recess 110a forming the opening H on one side and the first portion 110a2 of the recess 110a forming the opening H on the other side are separated by spokes 112 that are part of the base 110. That is, the base 110 includes a plurality of spokes 112, and an opening H is provided between the spokes 112, 112 adjacent to each other in the circumferential direction among the plurality of spokes 112. In this embodiment, the base 110 has 23 spokes 112. Each of the plurality of spokes 112 extends from the inner peripheral edge 110b of the base 110 toward the outer periphery side of the impeller 100 to the position of a connection portion 110a4 between the first portion 110a2 and the second portion 110a3 of the recess 110a.

[0041] The base 110, except for the spokes 112, is a frame 111 formed in a flat plate shape and a ring shape. The frame 111 is surrounded by the outer peripheral edge 110C of the base 110, the second portion 110a3 of the recess 110a, and a line BL connecting two adjacent connection portions 110a4 in the circumferential direction. In Figs. 5 and 6, one of the lines BL is shown by a dashed line to avoid blurring of the figures. The blades 101 are connected to the frame 111. The spokes 112 each extend from the frame 111 toward the inner peripheral portion 102.

[0042] 5 and 6, in this embodiment, the width W1 of each of the multiple spokes 112 on the frame 111 side is larger than the width W2 of the spokes 112 on the inner circumferential portion 102 side. Note that the "width" here means the length of the spokes 112 in the circumferential direction of the base 110. In this manner, in this embodiment, the spokes 112 are formed so that the width gradually increases from the inner circumferential side to the outer circumferential side of the impeller 100, so that the strength of the portion of the spokes 112 connected to the frame 111 to which the multiple blades 101 are connected is particularly enhanced. However, the width W1 of the spokes 112 on the frame 111 side may be equal to or smaller than the width W2 of the spokes 112 on the inner circumferential portion 102 side.

[0043] As shown in Figs. 4 to 7, the blades 101 are formed to have the same shape and size, and are arranged at predetermined intervals (for example, at equal intervals) around the entire circumference of the outer peripheral edge 110C of the base 110. In this embodiment, 39 blades 101 are connected to the frame 111 of the base 110. Thus, in this embodiment, the number of the blades 101 (39) is different from the number of the spokes 112 (23), and thus the spokes 112 are arranged in positions that are non-rotationally symmetrical with respect to the blades 101. Each of the blades 101 has a shape whose longitudinal direction is the axial direction, and as shown in Fig. 7 in particular, extends from the base 110 to both one side (upper side) and the other side (lower side) in the axial direction.

[0044] As shown in FIG. 6, each of the blades 101 is convex in the clockwise direction when viewed from below in the axial direction (convex in the counterclockwise direction when viewed from above in the axial direction), and has a curved arc shape. When attention is paid to a straight line RL extending in the radial direction of the impeller 100 from the center C of the impeller 100 through the inner peripheral end 101a of the blade 101, the outer end 101b of the blade 101 (the outer peripheral side of the impeller 100) is not on the straight line RL, but is shifted from the straight line RL in the circumferential direction of the base 110. In this embodiment, when viewed from below in the axial direction, the outer end 101b of the blade 101 is shifted from the straight line RL in the counterclockwise direction. In other words, when viewed from above in the axial direction, the end 101b is shifted from the straight line RL in the clockwise direction. On the other hand, when rotating the impeller 100 in the opposite direction, the side from which the semicircular blade 101 protrudes and the side on which the end 101b of the blade 101 deviates from the straight line RL may be opposite to the side when the impeller 100 rotates counterclockwise.

[0045] However, the shape and arrangement of the plurality of blades 101 as described above are not essential and may be changed as appropriate.

[0046] As shown in FIG. 4, FIG. 5, and FIG. 7, the outer peripheral portion 103 of the impeller 100 is located on the opposite side to the inner peripheral portion 102 side with respect to the multiple spokes 112 in the radial direction of the impeller 100. The outer peripheral portion 103 has a double annular shape when viewed from the axial direction. The outer peripheral portion 103 is connected to one (upper) end of each of the multiple blades 101 in the axial direction. That is, the multiple blades 101 are connected to the annular outer peripheral portion 103. In this way, the upper ends of the multiple blades 101 are connected by the outer peripheral portion 103, thereby suppressing deformation and damage of the multiple blades 101 due to wind pressure and the like when the impeller 100 rotates. The outer peripheral portion 103 includes an annular small diameter portion 103A located on the inner peripheral side of the impeller 100 and an annular large diameter portion 103B located on the outer peripheral side of the impeller 100. The diameter of the large diameter portion 103B is larger than the diameter of the small diameter portion 103A. The small diameter portion 103A and the large diameter portion 103B are integrally molded, and between the small diameter portion 103A and the large diameter portion 103B, a recessed portion 103C recessed toward the other side (lower side) in the axial direction is formed. The recessed portions 103C are formed at predetermined intervals (e.g., equal intervals) over the entire length in the circumferential direction of the outer circumferential portion 103. By forming such recessed portions 103C, the outer circumferential portion 103 may be made lighter while maintaining its strength. In addition, a weight (member) may be placed in the recessed portion 102Bc to ensure the balance of the impeller 100. It is not necessary to form the recessed portions 103C.

[0047] As described above, the impeller 100 according to this embodiment includes a plurality of blades 101, an annular inner circumferential portion 102 disposed inside the plurality of blades 101, and a flat base 110 connecting the annular inner circumferential portion 102 and the plurality of blades 101. In the impeller 100, the flat base 110 includes a frame 111 connecting the plurality of blades 101, and a plurality of spokes 112 extending from the frame 111 toward the annular inner circumferential portion 102.

[0048] According to such an impeller 100, since it has a plurality of spokes 112 extending from the frame 111 toward the annular inner circumferential portion 102, an opening H is formed between two adjacent spokes 112, extending from the inner circumferential portion 102 to a predetermined position in the radial direction of the flat base 110. That is, according to the impeller 100, a plurality of openings H are formed in the flat base 110. By mounting such an impeller 100 on, for example, the electronic device 1, the air sucked from the opening 31h (air suction port) of the electronic device 1 can pass through these openings H to both sides in the axial direction with the base 110 as a reference. Therefore, according to the impeller 100 and the electronic device 1 equipped with the impeller 100, the amount of wind AR discharged from the opening 42b by the rotation of the impeller 100 can be increased, and the air blowing efficiency of the electronic device can be improved.

[0049] As described above, each of the multiple openings H is formed from the inner periphery 102 (i.e., the inner periphery 110b of the base 110), and therefore the area of ​​the openings H is larger than when the openings H do not reach the inner periphery 110b. Therefore, the amount of air passing through the openings H increases, and the air blowing efficiency of the electronic device can be further improved.

[0050] Furthermore, according to impeller 100 of the present embodiment, the region (second region H2) on the outer circumferential edge 110C side of opening H protrudes toward the side of the plurality of blades 101, so opening H is expanded toward outer circumferential part 103 of impeller 100. Therefore, the amount of air passing through opening H is further increased, and the air blowing efficiency of the electronic device can be further improved.

[0051] On the other hand, each of the multiple openings H is separated from the outer peripheral edge 110C of the base 110 via the frame 111 of the base 110, and does not reach the outer peripheral edge 110C. In this way, in the impeller 100, the flat frame 111 is interposed between the base 110 and the outer peripheral edge 110C, so that the area of ​​the openings H is prevented from becoming excessively large. And, according to the impeller 100, since the area of ​​the openings H is not excessively large, the amount of air passing through the openings H is prevented from becoming excessive. Therefore, even if the blades 101 hit the air passing through the openings H, the noise generated by the blades 101 interfering with the air is reduced.

[0052] In this way, the impeller 100 of this embodiment makes it possible to improve the air blowing efficiency and reduce noise of an electronic device, and the electronic device 1 equipped with such an impeller 100 makes it possible to improve the air blowing efficiency and reduce noise.

[0053] In addition, the area of ​​the opening H increases as the radial position of the outer end of the opening H (i.e., the outer end 110a1 of the recess 110a) approaches the outer peripheral edge 110C of the base 110, which promotes improvement of the air blowing efficiency. On the other hand, the area of ​​the flat frame 111 increases as the radial position of the outer end 110a1 of the recess 110a approaches the inner peripheral edge 110b of the base 110, which promotes noise reduction. Therefore, in light of effectively promoting both improvement of the air blowing efficiency and noise reduction, as shown in Figs. 5 and 6, the ratio X1 / X2 of the radial distance X1 from the inner peripheral edge 110b of the base 110 to the outer end 110a1 of the recess 110a to the radial distance X2 from the outer peripheral edge 110C of the base 110 to the end 110a1 may be, for example, 1 or more and 3 or less.

[0054] Although the present invention has been described above by taking the above embodiment as an example, the present invention is not limited to this.

[0055] For example, in the above embodiment, an example has been described in which the opening H is formed in a pentagon, but the shape of the opening H is not limited to this. For example, the shape of the opening H may be a trapezoid, and the opening H having a trapezoidal shape is formed by a rectangular first region H1 and an outer portion protruding toward the side of the multiple blades 101. The shape of the opening H may be a polygon such as a hexagon, or may be a semicircle protruding toward the side of the multiple blades 101. The opening H having a polygonal or semicircular shape is formed by at least an outer portion protruding toward the side of the multiple blades 101.

[0056] In the above embodiment, an example has been described in which the opening H is formed on the outer peripheral edge 110C side so as to protrude toward the plurality of blades 101 when viewed in the axial direction, but the opening H does not have to be formed so that the outer peripheral side protrudes toward the plurality of blades 101 when viewed in the axial direction. For example, the entire opening H may be formed in the rectangular first region H1. Even in this case, the opening H reaches the inner peripheral edge 110b of the base 110, so that the area of ​​the opening H is large and the air blowing efficiency can be improved.

[0057] In the above embodiment, the impeller 100 includes the outer circumferential portion 103, but the outer circumferential portion 103 may be omitted. In this case, the weight of the impeller 100 can be reduced.

[0058] Furthermore, in the above-described embodiment, the nozzle main body 42 has a shape that narrows from the end face 42a on the housing 30 side toward the opening 42b on the opposite side to the housing 30 side, but is not limited to this, and may have a shape that widens from the end face 42a on the housing 30 side toward the opening 42b on the opposite side to the housing 30 side.

[0059] In addition, in the above embodiment, an example was described in which the electronic device 1 is a dryer. However, if an impeller such as the impeller 100 described above can be mounted, the electronic device 1 may be applied to a blower that blows gas, such as a fan motor.

[0060] In addition, those skilled in the art can appropriately modify the impeller and electronic device of the present invention in accordance with conventionally known knowledge. As long as the configuration of the present invention is still provided even after such modification, it is of course included in the scope of the present invention. [Explanation of symbols]

[0061] 1...electronic device, 30...housing, 100...impeller, 101...blade, 102...inner circumference, 103...outer circumference, 110...base, 111...frame, 112...spokes, H...opening, M...motor

Claims

1. Multiple feathers, An annular inner circumference is arranged inside the aforementioned plurality of wings, A flat plate-shaped base connects the annular inner circumference and the plurality of blades. Equipped with, The impeller comprises a flat base including a frame connected to the plurality of blades and a plurality of spokes extending from the frame toward the annular inner circumference.

2. The impeller according to claim 1, wherein there is an opening between two adjacent spokes among the plurality of spokes.

3. The impeller according to claim 2, wherein a portion of the opening on the side of the plurality of blades protrudes toward the plurality of blades.

4. The impeller according to any one of claims 1 to 3, wherein the width of the spokes on the plurality of blade sides is greater than the width of the spokes on the annular inner circumference side.

5. The impeller according to any one of claims 1 to 3, wherein the plurality of spokes are arranged in positions that are not rotationally symmetric with respect to the plurality of blades.

6. An impeller according to any one of claims 1 to 3, wherein the number of spokes and the number of blades are different.

7. It has a ring-shaped outer periphery, The impeller according to any one of claims 1 to 3, wherein the plurality of blades are connected to the annular outer circumference.

8. The aforementioned plurality of blades have a shape with the axial direction as the longitudinal direction, The impeller according to any one of claims 1 to 3, wherein the annular inner circumference has a cylindrical shape.

9. An electronic device comprising an impeller according to any one of claims 1 to 3, a motor, and a housing.

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