Blower device

Abstract

To provide a blower device that can deliver a wind having a large air volume and air velocity.SOLUTION: A blower device includes: a fan rotating in one direction of a circumferential direction to deliver a wind on an axial front side; and a grille including a plurality of ribs disposed on an axial rear side from the fan, arrayed in the circumferential direction, and having a spiral shape swirling in the other direction of the circumferential direction.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to a blower device. [Background technology]

[0002] Patent Document 1 discloses a circulator in which the fins of a grill on a front cover have a spiral shape, and the fins of a grill on a rear cover have a radial shape (paragraphs 0001, 0017, and 0023 and FIG. 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6363811 Summary of the Invention [Problem to be solved by the invention]

[0004] In the air circulator disclosed in Patent Document 1, a large pressure loss occurs in the grill of the rear cover, which may prevent the volume and speed of the airflow sent by the air circulator from being increased.

[0005] In view of this problem, an aspect of the present disclosure provides an air blower device capable of blowing air having a large volume and speed, for example. [Means for solving the problem]

[0006] A blower device of one embodiment of the present disclosure includes a fan that rotates in one circumferential direction and blows air forward in the axial direction, and a grill that is positioned axially rearward of the fan and has a plurality of ribs arranged in the circumferential direction and having a spiral shape winding in the other circumferential direction. [Brief description of the drawings]

[0007] [Figure 1] 1 is a perspective view illustrating a blower device according to a first embodiment, as viewed from above and to the left front; [Diagram 2] 1 is a perspective view illustrating a blower device according to a first embodiment, as viewed from above and rear on the right side; [Diagram 3] 1 is an exploded perspective view showing a schematic view of a main body included in a blower according to a first embodiment, as viewed from above and rear on the left side; [Figure 4] 1 is a cross-sectional view that diagrammatically illustrates a cross section including a central axis of a main body provided in a blower device of a first embodiment. [Diagram 5] 1 is a perspective view showing a schematic view of a main body included in a blower device according to a first embodiment, as viewed from above and rear on the left side; [Figure 6] 2 is a rear view diagrammatically illustrating a rear cover and a fan provided in the blower device of the first embodiment. FIG. [Figure 7] 2 is a cross-sectional view that diagrammatically illustrates a cross section perpendicular to the central axis of a rear cover provided in the blower device of the first embodiment. FIG. [Figure 8] FIG. 2 is a rear view diagrammatically illustrating a front cover provided in the blower device of the first embodiment. [Figure 9] 2 is a front view illustrating a schematic diagram of a rear grill and an ion generator provided in the air blower of the first embodiment. FIG. [Figure 10] 1 is an exploded perspective view showing a base, a first arm, and a second arm included in a blower device according to a first embodiment, as viewed from above and on the left front side; [Figure 11] 1 is an exploded perspective view showing a base, a first arm, and a second arm included in a blower device according to a first embodiment, as viewed from above and on the right front side; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same or equivalent elements are denoted by the same reference numerals, and duplicated descriptions will be omitted.

[0009] 1. First embodiment 1.1 Blower Fig. 1 is a perspective view of the blower device according to the first embodiment, as viewed from the upper left front side, and Fig. 2 is a perspective view of the blower device according to the first embodiment, as viewed from the upper right rear side.

[0010] The blower 1 of the first embodiment shown in Fig. 1 and Fig. 2 is a circulator that blows air with high linearity. The blower 1 may be a blower other than a circulator. For example, the blower 1 may be an electric fan, a blower built into an air conditioner, or the like.

[0011] As shown in FIGS. 1 and 2, the blower 1 includes a main body 11, a base 12, a first arm 13, a second arm 14, and a remote controller 15.

[0012] The main body 11 blows air. The main body 11 has an inlet 11a and an outlet 11b. The main body 11 blows air by sucking in air through the inlet 11a and blowing the sucked air out through the outlet 11b. The main body 11 has a cylindrical shape. The main body 11 may have a shape other than a cylindrical shape. The inlet 11a is formed across the rear bottom of the main body 11 and the rear end of the side wall of the main body 11. The outlet 11b is formed at the front bottom of the main body 11.

[0013] The base 12 supports the first arm 13, the second arm 14, and the remote controller 15. The base 12 has a cylindrical shape. The base 12 may have a shape other than a cylindrical shape. The base 12 has a lower surface. The base 12 is placed on an installation surface with the lower surface in contact with the installation surface.

[0014] The first arm 13 and the second arm 14 are supported by the base 12 and support the main body 11. In this way, the base 12, the first arm 13, and the second arm 14 form a stand that supports the main body 11.

[0015] The first arm 13 and the second arm 14 have a rod-like shape.

[0016] 1 and 2, the first arm 13 has a lower end 31 and an upper end 32. The second arm 14 has a lower end 41 and an upper end 42. The lower end 31 and the lower end 41 are connected to the base 12. The upper end 32 and the upper end 42 are connected to the main body 11. In this way, the first arm 13 and the second arm 14 support the main body 11 in a state in which the main body 11 is spaced upward from the base 12.

[0017] The base 12 has a width direction DW1. The width direction DW1 is a radial direction of the base 12. The main body 11 has a width direction DW2. The width direction DW2 is a radial direction of the main body 11. The width direction DW2 of the main body 11 is parallel to the width direction DW1 of the base 12. The lower end 31 and the lower end 41 are spaced apart from each other in the width direction DW1 of the base 12. The upper end 32 and the upper end 42 are spaced apart from each other in the width direction DW2 of the main body 11. As a result, the upper end 32 and the upper end 42 grip the main body 11 from the width direction DW2.

[0018] The upper end portion 32 and the upper end portion 42 pivotally support the main body 11. As a result, the upper end portion 32 and the upper end portion 42 support the main body 11 so that the main body 11 can tilt.

[0019] The remote controller 15 accepts an operation and transmits a signal corresponding to the accepted operation to the main body 11. The main body 11 receives the transmitted signal and performs an operation corresponding to the received signal.

[0020] The remote controller 15 is placed on the base 12 and can be lifted up from the base 12 .

[0021] 1.2 Main body Fig. 3 is an exploded perspective view of the main body of the blower according to the first embodiment, as viewed from the upper left rear. Fig. 4 is a cross-sectional view of the main body of the blower according to the first embodiment, the cross-section including the central axis of the main body.

[0022] As shown in FIGS. 1 to 4, the main body 11 includes a blower section 51, a rear cover 52, and a front cover 53.

[0023] The blower 51 blows air. The blower 51 draws air from a space behind the blower 51 and blows the drawn air into a space in front of the blower 51, thereby blowing air.

[0024] As shown in FIGS. 3 and 4, the blower 51 includes a fan 61, a motor 62, an ion generator 63, a housing component 64, and a support member 65.

[0025] The fan 61 has a central axis 61a and has a circumferential direction DC, a radial direction DR, and an axial direction DA. The fan 61 rotates about the central axis 61a in one direction DC1 of the circumferential direction DC to blow air to the front side in the axial direction DA.

[0026] The motor 62 supports the fan 61 so that the fan 61 can rotate about a central axis 61a, and rotates the supported fan 61 in one direction DC1 of the circumferential direction DC.

[0027] FIG. 5 is a perspective view that diagrammatically illustrates a state of a main body provided in the blower device of the first embodiment, as viewed from above and rear on the left.

[0028] 5, when the fan 61 rotates in one direction DC1 of the circumferential direction DC, the air in the space behind the fan 61 is sucked in by the fan 61 while swirling in the other direction DC2 of the circumferential direction DC, which is the opposite direction to the one direction DC1 of the circumferential direction DC. Therefore, the airflow generated by the air sucked in by the fan 61 and passing through the rear cover 52 is a swirling flow that swirls in the other direction DC2 of the circumferential direction DC.

[0029] Returning to FIG. 3 and FIG.

[0030] The ion generator 63 generates ions. The ion generator 63 is disposed on the rear side of the fan 61 in the axial direction DA, at a position offset from the central axis 61a. As a result, the ion generator 63 is disposed in an airflow generated by air sucked by the fan 61. As a result, the ion generator 63 generates ions in the air sucked by the fan 61. As a result, the blower 1 supplies air containing ions.

[0031] The housing component 64, the rear cover 52, and the front cover 53 constitute a housing 71. The housing 71 houses the fan 61, the motor 62, the ion generator 63, and the support member 65. The housing component 64 has a cylindrical shape. The housing component 64 is disposed coaxially with the fan 61 and the motor 62.

[0032] The housing component 64 has an inner circumferential surface 64a. The support member 65 is connected to the inner circumferential surface 64a. The support member 65 supports the motor 62. The motor 62 supports the ion generator 63. As a result, the housing component 64 supports the motor 62 via the support member 65 in a state in which the housing 71 houses the motor 62. Furthermore, the housing component 64 supports the ion generator 63 via the support member 65 and the motor 62 in a state in which the housing 71 houses the ion generator 63.

[0033] The rear cover 52 covers the rear side of the blower unit 51. The rear cover 52 allows air drawn in by the blower unit 51 to pass through. The rear cover 52 prevents the user's fingers or the like from entering the blower unit 51 from the rear side thereof. The rear cover 52 is connected to the rear end of the housing component 64.

[0034] The front cover 53 covers the front side of the blower unit 51. The front cover 53 allows air blown out by the blower unit 51 to pass through. The front cover 53 prevents the user's fingers, etc. from entering the blower unit 51 from the front side thereof. The front cover 53 is connected to the front end of the housing component 64.

[0035] 1.3 Rear cover FIG. 6 is a rear view that diagrammatically illustrates a rear cover and a fan provided in the blower device of the first embodiment.

[0036] 1 to 4 and 6, the rear cover 52 includes a rear grill 81. The rear grill 81 includes a bottom portion 91 and a side portion 92.

[0037] The bottom 91 constitutes the rear bottom of the main body 11. The bottom 91 has a perforated disk shape. A central portion of the bottom 91 overlaps with the fan 61 in a rear view. An edge of the bottom 91 does not overlap with the fan 61 in a rear view. The bottom 91 is disposed rearward of the fan 61 in the axial direction DA.

[0038] The side portion 92 constitutes the rear portion of the side wall of the main body 11. The side portion 92 has a perforated cylindrical shape. The side portion 92 extends forward in the axial direction DA from an edge of the bottom portion 91. The side portion 92 does not overlap with the fan 61 in rear view because it extends in the axial direction DA from an edge of the bottom portion 91 that does not overlap with the fan 61 in rear view. The side portion 92 is positioned outward in the radial direction DR from the fan 61.

[0039] 1.1 Bottom of rear grill 6, the bottom portion 91 includes a plate-like structure 101, a first annular bone 102, a second annular bone 103, and a plurality of bones 104. The bottom portion 91 is formed with an opening 91a.

[0040] The plate-like structure 101, the first annular bone 102, the second annular bone 103, and the multiple bones 104 are disposed rearward in the axial direction DA from the fan 61. The opening 91a of the bottom 91 is disposed rearward in the axial direction DA from the fan 61. The opening 91a allows an airflow generated by air sucked by the fan 61 and passing through the rear cover 52 to pass through.

[0041] The plate-like structure 101 is disposed at the center of the radial direction DR. The plate-like structure 101 has a disk-like shape. The plate-like structure 101 may have a plate-like shape other than a disk-like shape. As illustrated in FIG. 4, the plate-like structure 101 has a first main surface 101a and a second main surface 101b. The first main surface 104a and the second main surface 101b are on opposite sides to each other. The first main surface 104a and the second main surface 101b face the front side and the rear side, respectively, of the axial direction DA. The plate-like structure 101 is curved. The first main surface 104a is a convex surface. The second main surface 101b is a concave surface.

[0042] Returning to FIG. 6, the explanation will be continued.

[0043] The first annular bone 102 is disposed outside in the radial direction DR from the plate-like structure 101. The first annular bone 102 has an annular shape.

[0044] The second annular bone 103 is disposed outward in the radial direction DR from the first annular bone 102. The second annular bone 103 has an annular shape.

[0045] The bones 104 are arranged in the circumferential direction DC. The bones 104 have a spiral shape that winds in the other direction DC2 of the circumferential direction DC. Therefore, each bone 104 included in the bones 104 bends in one direction DC1 of the circumferential direction DC as it moves outward in the radial direction DR.

[0046] The airflow passing through the multiple ribs 104 is a swirling flow that swirls in the other direction DC2 of the circumferential direction DC. By making the shape of the multiple ribs 104, through which the swirling flow that swirls in the other direction DC2 of the circumferential direction DC passes, into a spiral shape that winds in the other direction DC2 of the circumferential direction DC, it is possible to reduce pressure loss that occurs in the rear grill 81. For this reason, it is possible to provide a blower device 1 that has a large air volume and air speed.

[0047] In a prototype of a blower equipped with multiple ribs having a spiral shape wound in one direction DC1 in the circumferential direction DC, the air volume was 18.24 m 3 / min, and the wind speed at the center was 4.89 m / s. In contrast, in the prototype of the blower 1 including the multiple ribs 104 having a spiral shape wound in the other direction DC2 of the circumferential direction DC, the air volume was 22.45 m 3 / min, and the wind speed at the center was 5.56 m / s.

[0048] The winding of the bones 104 in the other direction DC2 of the circumferential direction DC is gentle so that the airflow passing through the bones 104 does not become a vortex airflow. This allows the ions generated by the ion generator 63 to be distributed in a well-balanced manner. In addition, the winding is gentle so that the opening area of ​​the rear grille 81 does not become too small.

[0049] Each bone 104 has a plate-like shape. Each bone 104 has a first main surface 104a and a second main surface 104b. The first main surface 104a and the second main surface 104b are on opposite sides to each other. The first main surface 104a and the second main surface 104b are parallel to the axial direction DA. Therefore, each bone 104 acts as an airflow guide plate that guides the airflow.

[0050] The plurality of bones 104 includes a first bone 111 and a second bone 112 .

[0051] An inner end of the first bone 111 is connected to the plate-like structure 101. An intermediate portion of the first bone 111 is connected to the first annular bone 102. An outer end of the first bone 111 is connected to the second annular bone 103. As a result, the first bone 111 extends outward in the radial direction DR from the first radial position where the plate-like structure 101 is disposed, passes through the radial position where the first annular bone 102 is disposed, and reaches the radial position where the second annular bone 103 is disposed.

[0052] The inner end of the second bone 112 is disposed between the plate-like structure 101 and the first annular bone 102. The middle part of the second bone 112 is connected to the first annular bone 102. The outer end of the second bone 112 is connected to the second annular bone 103. As a result, the second bone 112 extends outward in the radial direction DR from a second radial position between the first radial position where the plate-like structure 101 is disposed and the radial position where the first annular bone 102 is disposed, and reaches the radial position where the second annular bone 103 is disposed via the radial position where the first annular bone 102 is disposed.

[0053] In this way, the first bone 111 extends outward in the radial direction DR from the first radial position, and the second bone 112 extends outward in the radial direction DR from the second radial position that is outward of the first radial position in the radial direction DR, thereby reducing the number of bones 104 present on the inside of the radial direction DR where the bones 104 adjacent in the circumferential direction approach each other, and increasing the number of bones 104 present on the outside of the radial direction DR where the bones 104 adjacent in the circumferential direction move away from each other. This makes it possible to simultaneously reduce the size of each of the multiple openings 91a formed in the bottom 91 and increase the opening area of ​​the bottom 91. This makes it possible to simultaneously prevent the user's fingers or the like from entering through the multiple openings 91a and reduce the pressure loss occurring in the rear grille 81.

[0054] The inner end of the second bone 112 is disposed between the plate-like structure 101 and the first annular bone 102. Therefore, the second bone 112 protrudes inward in the radial direction DR from the first annular bone 102. This allows the second bone 112 to be disposed at the edge of the region inside the first annular bone 102 in the radial direction DR, but not at the center of the region. This allows the second bone 112 to be disposed at the edge of the region where the first bones 111 adjacent to each other in the circumferential direction DC move away from each other, and the second bone 112 to be not disposed at the center of the region where the first bones 111 adjacent to each other in the circumferential direction DC move closer to each other. This allows both reducing the size of each of the multiple openings 91a formed in the region and increasing the opening area of ​​the region. This allows both preventing the user's fingers or the like from entering through the multiple openings 91a and reducing the pressure loss occurring in the region. The length by which the second bone 112 protrudes from the first annular bone 102 is made small so that the open area of ​​that region is sufficiently large.

[0055] 1.2 Side of rear grille FIG. 7 is a cross-sectional view that diagrammatically illustrates a cross section perpendicular to the central axis of the rear cover provided in the blower of the first embodiment.

[0056] 6 and 7, the side portion 92 includes an annular structure 121 and a plurality of side bones 122. The side portion 92 includes an opening 92a formed therein.

[0057] The annular structure 121 and the multiple side bones 122 are disposed outward in the radial direction DR from the fan 61. The opening 92a of the side portion 92 is disposed outward in the radial direction DR from the fan 61. The opening 92a allows an airflow generated by air sucked by the fan 61 and passing through the rear cover 52 to pass through.

[0058] The annular structure 121 has an annular shape. The annular structure 121 has a diameter that matches the diameter of the rear end portion of the housing component 64. The annular structure 121 is connected to the rear end portion of the housing component 64.

[0059] The side bones 122 are arranged in the circumferential direction DC. Front ends of the side bones 122 are connected to the annular structure 121. Rear ends of the side bones 122 are connected to the second annular bone 103. The side bones 122 are continuous with the bones 104, respectively.

[0060] Each of the side bones 122 included in the plurality of side bones 122 has a plate-like shape. Each side bone 122 has a first main surface 122a and a second main surface 122b. The first main surface 122a and the second main surface 122b are on opposite sides to each other. The first main surface 122a faces in a direction inclined from the other direction DC2 of the circumferential direction DC to the outside in the radial direction DR. The second main surface 122b faces in a direction inclined from one direction DC1 of the circumferential direction DC to the inside in the radial direction DR.

[0061] The airflow passing through the multiple side bones 122 is a swirling flow that swirls in the other direction DC2 of the circumferential direction DC. The first main surface 122a of each side bone 122 faces in a direction inclined from the other direction DC2 of the circumferential direction DC to the outside of the radial direction DR, and the second main surface 122b of each side bone 122 faces in a direction inclined from one direction DC1 of the circumferential direction DC to the inside of the radial direction DR, thereby making it possible to reduce pressure loss occurring in the side portion 92. For this reason, it is possible to provide a blower 1 that has a large air volume and air speed.

[0062] 1.3 Front cover As shown in FIGS. 1 to 4 , the front cover 53 includes a front grill 131 and a tubular structure 132 .

[0063] The front grill 131 constitutes the front bottom of the main body 11. The front grill 131 has a perforated circular plate shape. A central portion of the front grill 131 overlaps with the fan 61 in a rear view. An edge portion of the front grill 131 does not overlap with the fan 61 in a rear view. The front grill 131 is disposed forward of the fan 61 in the axial direction DA.

[0064] The tubular structure 132 constitutes the front end of the side wall of the main body 11. The tubular structure 132 has a cylindrical shape. The tubular structure 132 extends rearward in the axial direction DA from an edge of the front grill 131. The tubular structure 132 does not overlap with the fan 61 in rear view because it extends in the axial direction DA from an edge of the front grill 131 that does not overlap with the fan 61 in rear view. The tubular structure 132 is disposed outward in the radial direction DR from the fan 61.

[0065] 1.4 Front grille FIG. 8 is a rear view that typically illustrates a front cover provided in the blower device of the first embodiment.

[0066] 8, the front grille 131 includes a plate-like structure 141, an annular bone 142, and a plurality of front bones 143. The front grille 131 is formed with an opening 131a.

[0067] The plate-like structure 141, the annular bone 142, and the multiple front bones 143 are disposed forward in the axial direction DA from the fan 61. The opening 131a of the front grill 131 is disposed forward in the axial direction DA from the fan 61. The opening 131a allows an airflow generated by air blown out by the fan 61 and passing through the front cover 53 to pass through.

[0068] The plate-like structure 141 is disposed at the center in the radial direction DR. The plate-like structure 141 has a rectangular plate shape. The plate-like structure 141 may have a plate shape other than the rectangular plate shape.

[0069] The annular bone 142 is disposed outward in the radial direction DR from the plate-like structure 141. The annular bone 142 has an annular shape.

[0070] The multiple front bones 143 are arranged in the circumferential direction DC. The multiple front bones 143 have a spiral shape wound in one direction DC1 of the circumferential direction DC. Therefore, each front bone 143 included in the multiple front bones 143 bends in the other direction DC2 of the circumferential direction DC as it moves toward the outside in the radial direction DR.

[0071] By forming the front bones 143 in a spiral shape wound in one direction DC1 of the circumferential direction DC, the airflow that has passed through the front grill 131 can be gathered near the central axis 61a. This makes it possible to provide a blower device 1 that can blow air with high linearity.

[0072] In order to make the winding of the circumferential direction DC of the multiple bones 104 in the other direction DC2 gentler, the winding of the circumferential direction DC of the multiple bones 104 in the other direction DC2 is made gentler than the winding of the circumferential direction DC in one direction DC1 of the multiple anterior bones 143. For this reason, the amount of bending of the circumferential direction DC in one direction DC1 at a specific radial position of the multiple bones 104 is made smaller than the amount of bending of the circumferential direction DC in the other direction DC2 at the specific radial position of the multiple anterior bones 143.

[0073] Each front bone 143 has a plate-like shape. Each front bone 143 has a first main surface 143a and a second main surface 143b. The first main surface 143a and the second main surface 143b are on opposite sides to each other. The first main surface 143a and the second main surface 143b are parallel to the axial direction DA. Each front bone 143 serves as an airflow guide plate that guides the airflow passing through the openings 131a formed by the multiple front bones 143 in the axial direction DA.

[0074] 1.5 Ion generator and rear grille arrangement FIG. 9 is a front view that typically illustrates a rear grill and an ion generator that are provided in the air blower of the first embodiment.

[0075] As shown in Figs. 1 to 4, the rear grill 81 has a perforated bowl shape. Therefore, an internal bowl space is formed in the rear grill 81. The ion generator 63 is disposed in the internal bowl space. Therefore, as shown in Figs. 1 to 4 and 9, the rear grill 81 includes a first portion 151 disposed on the rear side of the ion generator 63 in the axial direction DA and a second portion 152 disposed on the outside of the ion generator 63 in the radial direction DR. A first opening 151a is formed in the first portion 151. A second opening 152a is formed in the second portion 152. The first portion 151 is a part of the bottom portion 91. The second portion 152 is a part of the side portion 92. Therefore, the second portion 152 is disposed on the outside of the plurality of bones 104 in the radial direction DR. The first opening 151a is a part of the opening 91a. The second opening 152a is a part of the opening 92a. This allows the ion generator 63 to generate ions in the air that is circulated by the airflow that has passed through the first opening 151a and the airflow that has passed through the second opening 152a. This allows the blower 1 to efficiently send out the generated ions. This allows the blower 1 to supply air with a high ion concentration.

[0076] 1.6 Structure of the ion generator As shown in FIG. 9, the ion generator 63 includes a power source 161 , an electrode 162 and a containing structure 163 .

[0077] The power supply 161 generates a high voltage and applies the generated high voltage to the electrode 162 .

[0078] The electrode 162 generates a discharge due to the applied high voltage, and the generated discharge generates ions.

[0079] The housing structure 163 has an internal space 163a and an opening 163b. The internal space 163a houses the electrode 162. The opening 163b exposes the internal space 163a toward the outside in the radial direction DR. This allows easy access to the internal space 163a via the opening 163b when the rear grill 81 is removed. This allows easy cleaning of the electrode 162 housed in the internal space 163a.

[0080] 1.7 Connecting the Arm to the Base Fig. 10 is an exploded perspective view showing a base, a first arm, and a second arm of the blower of the first embodiment as viewed from the upper left front side. Fig. 11 is an exploded perspective view showing a base, a first arm, and a second arm of the blower of the first embodiment as viewed from the upper right front side.

[0081] As shown in Figures 10 and 11, the base 12 has an outer peripheral surface 12b. A first groove 12c and a second groove 12d are formed in the base 12. The first groove 12c and the second groove 12d are formed in the outer peripheral surface 12b. The first groove 12c and the second groove 12d are spaced apart from each other in the width direction DW1. The outer peripheral surface 12b has a first bottom surface 12e and a second bottom surface 12f that define the first groove 12c and the second groove 12d, respectively. The first bottom surface 12e and the second bottom surface 12f face one direction and the other direction of the width direction DW1, respectively.

[0082] The lower end 31 and the lower end 41 have shapes that fit the shapes of the first groove 12c and the second groove 12d of the base 12, respectively. The lower end 31 and the lower end 41 are inserted into the first groove 12c and the second groove 12d, respectively. As a result, the lower end 31 and the lower end 41 are fixed to the base 12. The lower end 31 and the lower end 41 are screwed to the base 12. The lower end 31 and the lower end 41 have contact surfaces 31a and 41a, respectively. The contact surfaces 31a and 41a face the other side and one side in the width direction DW1. The contact surfaces 31a and 41a are in surface contact with the first bottom surface 12e and the second bottom surface 12f of the base 12, respectively. As a result, it is possible to suppress the first arm 13 and the second arm 14 from moving in the width direction DW1. This makes it possible to suppress lateral vibration of the first arm 13 and the second arm 14. The lower end 31 and the lower end 41 are accommodated in the first groove 12c and the second groove 12d, respectively, and do not protrude from the first groove 12c and the second groove 12d in the width direction DW1.

[0083] The base 12 has an upper surface 12a. The first groove 12c and the second groove 12d of the base 12 are formed along the upper surface 12a. This allows the lower end 31 and the lower end 41 to be inserted into the first groove 12c and the second groove 12d, respectively, from the upper surface 12a side. This allows the area occupied by the base 12 to be reduced.

[0084] 1.8 Arm bending 10 and 11, the first arm 13 and the second arm 14 have a curved rod shape. Therefore, the first arm 13 has a curved portion 33. The second arm 14 has a curved portion 43.

[0085] The curved portion 33 is located midway between the lower end 31 connected to the base 12 and the upper end 32 connected to the main body 11. The curved portion 43 is located midway between the lower end 41 connected to the base 12 and the upper end 42 connected to the main body 11. The first arm 13 is curved at the curved portion 33. The second arm 14 is curved at the curved portion 43. This provides the first arm 13 and the second arm 14 with greater strength than an arm having a straight rod shape.

[0086] The curved portion 33 is formed above the base 12. The first arm 13 extends upward from the lower end 31 to the lower end of the curved portion 33, bends outward at the curved portion 33, and extends upward from the upper end of the curved portion 33 to the upper end 32. The curved portion 43 is formed above the base 12. The second arm 14 extends upward from the lower end 41 to the lower end of the curved portion 43, bends outward at the curved portion 43, and extends upward from the upper end of the curved portion 43 to the upper end 42. This allows the width of the base 12 to be smaller than the width of the main body 11. In addition, it is possible to prevent the first arm 13 and the second arm 14 from protruding in the width direction DW1 within the height range where the base 12 exists. This allows the area occupied by the base portion consisting of the base 12, the lower end 31, and the lower end 41 to be reduced.

[0087] The present disclosure is not limited to the above-described embodiments, and may be replaced with a configuration that is substantially the same as the configuration shown in the above-described embodiments, a configuration that has the same action and effect, or a configuration that can achieve the same purpose. [Explanation of symbols]

[0088] 1 blower, 11 main body, 11a intake port, 11b outlet port, 12 base, 12a upper surface, 12b outer peripheral surface, 12c first groove, 12d second groove, 12e first bottom surface, 12f second bottom surface, 13 first arm, 14 second arm, 15 remote controller, 31 lower end, 31a contact surface, 32 upper end, 33 curved portion, 41 lower end, 41a contact surface, 42 upper end, 43 curved portion, 51 blower, 52 rear cover, 53 front cover, 61 fan, 61a central axis, 62 motor, 63 ion generator, 64 housing component, 64a inner peripheral surface, 65 support member, 71 housing, 81 rear grill, 91 bottom, 91a opening, 92 Side, 92a, opening, 101, plate-like structure, 101a, first main surface, 101b, second main surface, 102, first annular bone, 103, second annular bone, 104, bone, 104a, first main surface, 104b, second main surface, 111, first bone, 112, second bone, 121, annular structure, 122, side bone, 122a, first main surface, 122b, second main surface, 131, front grill, 131a, opening, 132, tubular structure, 141, plate-like structure, 142, annular bone, 143, front bone, 143a, first main surface, 143b, second main surface, 151, first portion, 151a, first opening, 152, second portion, 152a, second opening, 161, power source, 162, electrode, 163 Housing structure, 163a internal space, 163b opening, DW1 width direction, DW2 width direction, DC circumferential direction, DR radial direction, DA axial direction, DC1 one direction, DC2 other direction.

Claims

1. A fan that rotates in one circumferential direction and blows air toward the front side in the axial direction; a grille including a plurality of ribs arranged in the circumferential direction and having a spiral shape that winds in the other direction of the circumferential direction, the grille being disposed rearward of the fan in the axial direction; A blower device comprising:

2. The airflow passing through the plurality of bones is a swirling flow swirling in the other direction. The blower device according to claim 1 .

3. The plurality of bones includes a first bone extending radially outward from a first radial position, and a second bone extending radially outward from a second radial position that is located on the outer side of the first radial position. The blower device according to claim 1 or 2.

4. The grill comprises an annular bone having an annular shape; The second bone protrudes radially inward from the annular bone. The blower device according to claim 3.

5. The grill has a side portion that does not overlap with the fan in a rear view and extends in the axial direction, The side portion includes a plurality of side bones arranged in the circumferential direction, Each of the side bones has a plate-like shape and has a first main surface facing in a direction inclined radially outward from the other direction and a second main surface facing in a direction inclined radially inward from the one direction. The blower device according to claim 1 or 2.

6. a front grille including a plurality of front bones arranged forward of the fan, arranged in the circumferential direction, and having a spiral shape wound in one direction; The blower device according to claim 1 or 2.

7. The winding of the bones in the other direction is gentler than the winding of the anterior bones in the one direction. The blower device according to claim 6.

8. An ion generator; a housing having the grill and accommodating the fan and the ion generator; The blower device according to claim 1 or 2, comprising:

9. The grill includes a first portion disposed on the rear side with respect to the ion generator and having a first opening formed therein, and a second portion disposed on the radially outer side with respect to the ion generator and the plurality of bones and having a second opening formed therein. The blower device according to claim 8.

10. The ion generator includes an electrode, and a housing structure having an internal space for housing the electrode and an opening for exposing the internal space toward the outside in a radial direction. The blower device according to claim 8.

11. The grille is disposed at the radial center and has a plate-like structure having a circular disk shape and a concave surface facing the rear side. The blower device according to claim 1 or 2.

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