Blower

Abstract

To provide a blower that facilitates the routing of lead wires and reduces the time and effort required for routing lead wires when installing the blower. [Solution] The blower 100 includes a motor positioned in a through-hole 111 of the housing 10, and an impeller positioned inside the through-hole of the housing, which is rotated by the motor to generate airflow. The housing includes a plurality of stationary vanes 13 that protrude inward from the inner wall of the through-hole of the main body 11. A concave lead wire housing groove 15 extending in the axial direction is formed on the outer surface of the main body. The plurality of stationary vanes are arranged in the circumferential direction. Stationary vanes adjacent to the lead wire housing groove in the circumferential direction face the base 12 radially with a gap in between, and the remaining stationary vanes are connected to the base.

Description

Technical Field

[0001] The present invention relates to a blower device.

Background Art

[0002] Conventional blower devices rotate an impeller to generate an air flow by supplying power to the coils of a motor disposed inside a housing (see Patent Document 1 and the like). In this type of blower device, power is supplied to the coils of the motor via lead wires.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When attaching the motor to the housing, it is necessary to devise the routing of the lead wires, and the workability of routing the lead wires may be low.

[0005] Therefore, an object of the present invention is to provide a blower device that facilitates the routing of lead wires and reduces the time and labor required for routing the lead wires when the blower device is installed.

Means for Solving the Problems

[0006] An exemplary blower of the present invention comprises a housing having a through-hole that penetrates along a central axis extending vertically, a motor disposed in the through-hole of the housing, and an impeller disposed inside the through-hole of the housing and rotated by the motor to generate an axially flowing airflow into the through-hole. The housing comprises a main body having the through-hole, a base disposed inside the through-hole, and a plurality of stator vanes protruding inward from the inner wall of the through-hole of the main body. A concave lead wire housing groove extending in the axial direction is formed on the outer surface of the main body. The plurality of stator vanes are arranged in the circumferential direction. The stator vanes adjacent to the lead wire housing groove in the circumferential direction face the base radially with a gap in between, and the remaining stator vanes are connected to the base. [Effects of the Invention]

[0007] According to the exemplary present invention, the time and effort required for routing lead wires can be reduced. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a top-down perspective view of an example of a blower. [Figure 2] Figure 2 is a perspective view of the blower shown in Figure 1, viewed from below. [Figure 3] Figure 3 is an exploded perspective view of the blower shown in Figure 1. [Figure 4] Figure 4 is a cross-sectional view taken from a plane containing the central axis of the blower shown in Figure 1. [Figure 5] Figure 5 is a perspective view of the housing. [Figure 6] Figure 6 is a plan view of the housing. [Figure 7] Figure 7 is a rear view of the housing. [Figure 8] Figure 8 is a cross-sectional view including the fixing portion between the impeller and the rotor holder. [Figure 9] Figure 9 is a perspective view showing the impeller and rotor holder separated. [Figure 10] Figure 10 is a schematic perspective view showing an example of an external device utilizing a blower. [Modes for carrying out the invention]

[0009] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In this specification, the direction parallel to the central axis C1, which is the center of rotation of the impeller 30 of the blower 100, is referred to as the "axial direction," the direction perpendicular to the central axis C1 is referred to as the "radial direction," and the direction along the arc centered on the central axis C1 is referred to as the "circumferential direction." The circumferential direction is not limited to the tangential direction of the arc, but also includes directions inclined at a certain angle (for example, 45°) with respect to the tangential direction. For example, the direction along the outer circumferential surface of the main body 11 of the housing 10, which is perpendicular to the axial direction, may also be referred to as the circumferential direction.

[0010] Furthermore, in this specification, the shape and positional relationship of each part of the blower 100 will be described with the axial direction defined as vertical, the intake port 113 of the housing 10 being at the top, and the exhaust port 114 being at the bottom. Note that the vertical direction is merely a name used for explanatory purposes and does not limit the positional relationship and direction in the operating state of the blower 100.

[0011] (First Embodiment) Figure 1 is a top-down perspective view of an example of the blower 100. Figure 2 is a bottom-up perspective view of the blower 100 shown in Figure 1. Figure 3 is an exploded perspective view of the blower 100 shown in Figure 1. Figure 4 is a cross-sectional view of the blower 100 shown in Figure 1, cut by a plane containing the central axis C1. Figure 5 is a perspective view of the housing 10. Figure 6 is a plan view of the housing 10. Figure 7 is a rear view of the housing 10.

[0012] <Air blower 100> As shown in FIGS. 1 to 4, the blower device 100 according to the present embodiment includes a housing 10, a motor 20, an impeller 30, and a cover member 40. The housing 10 has a through-hole portion 111 that penetrates along a central axis C1 extending vertically. The motor 20 is disposed in the through-hole portion 111 of the housing 10. Further, the impeller 30 is disposed inside the through-hole portion 111 of the housing 10 and is rotated by the motor 20. Thereby, an air flow Afw flowing in the axial direction is generated in the through-hole portion 111. Details of each part of the blower device 100 will be described in order below.

[0013] <Housing 10> The housing 10 includes a main body portion 11, a base portion 12, a stator blade 13, and a shaft support portion 17. The housing 10 is an integrally molded resin body. Although details will be described later, the housing 10 serves as an attachment member when attaching the blower device 100 to an external device 200.

[0014] <Main body portion 11> The main body portion 11 has a rectangular parallelepiped shape, and the main body portion is square when viewed in the axial direction. The main body portion 11 has a through-hole portion 111. The main body portion 11 has four side surfaces. And a corner portion 112 is formed at a portion sandwiched between adjacent side surfaces 110. As shown in FIGS. 1 and 2, the main body portion 11 has four corner portions 112, and each corner portion 112 extends along the central axis C1.

[0015] The through-hole portion 111 is provided at the center of the main body portion 11 when viewed from the axial direction and has a cylindrical shape that penetrates in the axial direction. The center line of the through-hole portion 111 coincides with the central axis C1. The upper end in the axial direction of the through-hole portion 111 is an intake port 113, and the lower end is an exhaust port 114. Then, when the impeller 30 rotates, the air sucked from the intake port 113 becomes the air flow Afw and is exhausted from the exhaust port 114.

[0016] On side surfaces 110a and 110b that sandwich corner portion 112a, which is one of the four corner portions 112 provided on the main body portion 11, recesses 14 that are recessed more than other portions are formed. The recesses 14 are formed across side surfaces 110a and 110b that sandwich corner portion 112a. As shown in FIGS. 1 and 2, in the blower device 100 according to the present embodiment, it is formed from corner portion 112a of side surface 110a to approximately the center of side surface 110a in plan view. Similarly, it is formed from corner portion 112a of side surface 110b to approximately the center of side surface 110b in plan view. And the recesses 14 are continuously formed from the upper end to the lower end in the axial direction of the main body portion 11. Note that the depth of the recesses 14 is the same as or greater than the thickness of the cover member 40.

[0017] Although details will be described later, the cover member 40 is attached to the recesses 14. In the case of a configuration in which the cover member 40 is attached to both axial ends, the recesses 14 may be provided at least at both axial ends.

[0018] Also, the main body portion 11 has a lead wire accommodation groove 15 formed on side surface 110 and a lead wire pressing portion 16. The lead wire accommodation groove 15 is formed on side surface 110a. The lead wire accommodation groove 15 is formed at an end portion on the side closer to corner portion 112a of side surface 110a. The lead wire accommodation groove 15 has a concave shape that is recessed radially inward from side surface 110a and is formed to penetrate from the upper end to the lower end in the axial direction of the main body portion 11. That is, a concave-shaped lead wire accommodation groove 15 that extends in the axial direction is formed on side surface 110 of the main body portion 11. That is, the lead wire accommodation groove 15 is formed over the entire axial length of the main body portion 11.

[0019] In the lead wire accommodation groove 15, a lead wire 25, which will be described later and supplies power to the motor 20, is arranged. That is, the lead wire accommodation groove 15 has a cross-sectional shape and size capable of accommodating the lead wire 25.

[0020] As shown in Figures 1 and 2, the lead wire retaining portion 16 is provided at the upper and lower ends in the axial direction of the lead wire housing groove 15. The lead wire retaining portion 16 covers a part of the opening in the direction intersecting the axial direction of the lead wire housing groove 15, that is, a part of the opening formed on the side surface 110a. In other words, the lead wire retaining portion 16 is formed on the main body portion 11 and covers a part of the opening 151 in the direction intersecting the axial direction of the lead wire housing groove 15. The lead wire retaining portion 16 holds down the lead wire 25 that tries to move out of the lead wire housing groove 15, thereby preventing the lead wire 25 from moving out. To further explain, the outer surface of the lead wire retaining portion 16 is flush with the recess 14 on the side surface 110a.

[0021] The lead wire retainer portion 16 is beam-shaped and extends from one end to the other of the opening of the lead wire housing groove 15. A gap is formed between the tip of the lead wire retainer portion 16 and the other end of the opening 151 of the lead wire housing groove 15, and this gap is the lead wire passage portion 161. The lead wire 25 is inserted into the lead wire housing groove 15 via the lead wire passage portion 161. The lead wire passage portion 161 is a gap that connects the lead wire housing groove 15 to the outside in the portion adjacent to the lead wire retainer portion 16 in the circumferential direction. In other words, the lead wire retainer portion 16 and the lead wire passage portion 161 are provided at least at both ends in the axial direction.

[0022] This configuration allows the lead wires 25 to be easily routed toward the opposite side of the base portion 12 of the main body 11. Furthermore, it prevents the lead wires 25 housed in the lead wire housing groove 15 from separating from the main body 11. Therefore, the lead wires 25 can be bundled together during transport and installation of the blower 100, improving work efficiency.

[0023] A groove 181 that is recessed in the axial direction is formed on the lower surface 18 of the axially lower end of the main body 11. The groove 181 connects the axially lower end of the lead wire housing groove 15 to the axially lower end of the through hole 111. The lead wire 25 is inserted into the groove 181. In other words, the lead wire 25 that crosses the through hole 111 is routed into the groove 181 and then routed into the lead wire housing groove 15.

[0024] <Base section 12> The base portion 12 is provided inside the through-hole portion 111 of the main body portion 11. More specifically, the base portion 12 is provided at the lower axial end of the through-hole portion 111. The base portion 12 has a bottom plate portion 121 and a side wall portion 122. The bottom plate portion 121 is disc-shaped. The bottom plate portion 121 is provided below the through-hole portion 111 and supports the motor 20. The outer circumferential surface of the bottom plate portion 121 and the inner circumferential surface of the through-hole portion 111 are arranged with a radial gap between them. The gap between the through-hole portion 111 and the base portion 12 is an exhaust port 114 that exhausts the airflow Afw (see Figure 4) to the outside.

[0025] The side wall portion 122 protrudes upward along the axial direction from the outer edge of the bottom plate portion 121. The side wall portion 122 is formed along the circumferential direction, and a discontinuous notch portion 123 is provided in a part of the side wall portion 122 in the circumferential direction.

[0026] The notch 123 is formed overlapping the corner 112a in the circumferential direction. The lead wire housing groove 15 is formed at the end of the side surface 110a on the corner 112a side, which is located next to the corner 112a where the circumferential position of the notch 123 overlaps.

[0027] A circuit board 24 for the motor 20, which will be described later, is placed on the base portion 12. The lead wires 25 connected to the circuit board 24 cross the exhaust port 114 and are placed inside the lead wire housing groove 15. The side wall portion 122 has a notch 123, and the lead wires 25 are pulled out radially outward from the base portion 12 through the notch 123. In other words, the lead wires 25 are pulled out at the notch 123. This prevents the lead wires 25 from being routed at an unnatural angle compared to when they are routed through the upper part of the side wall portion 122.

[0028] <Silent Wing 13> The housing 10 has 11 stator vanes 13 that project radially inward from the inner wall of the through-hole 111 of the main body 11. Note that the number of stator vanes 13 is not limited to 11. That is, multiple stator vanes 13 project inward from the inner wall of the through-hole 111 of the main body 11. The 11 stator vanes 13 are arranged at equal intervals in the circumferential direction. The 11 stator vanes 13 are arranged at equal intervals in the circumferential direction, but are not limited to this. That is, multiple stator vanes 13 are arranged in the circumferential direction. The stator vanes 13 convert the circumferential velocity component of the airflow Afw generated by the impeller 30 into an axial velocity component. In other words, the stator vanes 13 rectify the circumferentially flowing airflow Afw into an axially flowing airflow.

[0029] Ten of the eleven stator vanes 13 are first stator vanes 131, and one is a second stator vane 132. The stator vane 13 positioned radially adjacent to the notch 123 is the second stator vane 132. More specifically, in a plan view, the second stator vane 132 is the stator vane 13 of the eleven stator vanes 13 that is circumferentially adjacent to the lead wire housing groove 15. The second stator vane 132 faces the base portion 12 radially via a gap 115, while the remaining stator vane 13, the first stator vane 131, is connected to the base portion 12.

[0030] This allows the lead wire 25, which is pulled out through the notch 123, to be routed through the gap 115. The lead wire 25 is then positioned below the second stationary vane 132 and routed across the exhaust port 114. In this way, the presence of the gap 115 makes it easy to route the lead wire 25.

[0031] By configuring the stationary vane 13 in this way, the ease of wiring the lead wires 25 for supplying power to the motor 20 is improved, reducing the time and effort required to manufacture the blower 100. Furthermore, because the lead wires 25 can be precisely wired to the designated positions, contact between the lead wires 25 and rotating parts such as the motor 20 and impeller 30 can be suppressed.

[0032] Furthermore, the radially inward end of the first stator vane 131 is connected to the side wall portion 122 of the base portion 12. As a result, the first stator vane 131 straightens the airflow Afw and also acts as a rib to hold the base portion 12. And because the base portion 12 is held by the 10 first stator vanes 131, the base portion 12 is firmly held to the main body portion 11.

[0033] <Shaft support part 17> The shaft support portion 17 is attached to the base portion 12. The shaft support portion 17 holds the stator 23 of the motor 20 and rotatably supports the shaft 21. The shaft support portion 17 has a support sleeve 170, a first bearing 171, and a second bearing 172.

[0034] The support sleeve 170 is fixed to the center of the axial upper surface 120 of the bottom plate portion 121 of the base portion 12 when viewed in the axial direction. The fixing of the support sleeve 170 to the bottom plate portion 121 can be, for example, press-fitting, bonding, welding, etc., but is not limited to these. A wide range of fixing methods that can firmly secure the support sleeve 170 to the bottom plate portion 121 can be employed.

[0035] The support sleeve 170 is cylindrical and extends in the axial direction. The stator 23 is fixed to the outer surface of the support sleeve 170. Inside the support sleeve 170, the first bearing 171 and the second bearing 172 are fixed at an axial distance from each other. The centers of the first bearing 171 and the second bearing 172 coincide with the central axis C1. In the blower 100 of this embodiment, the first bearing 171 and the second bearing 172 are ball bearings, but are not limited to these. For example, as bearings, fluid bearings, sliding bearings, etc., can be widely used, as long as they are capable of rotatably supporting the shaft 21 relative to the support sleeve 170.

[0036] <Motor 20> The motor 20 includes a shaft 21, a rotor 22, a stator 23, a circuit board 24, and lead wires 25. The motor 20 supplies current to a coil 233 of the stator 23 (described later), causing the rotor 22, which is fixed to the shaft 21, to rotate together with the shaft 21 around the central axis C1. The motor 20 is an outer rotor type motor in which the rotor 22, which is located radially outward from the stator 23, rotates; however, it may also be an inner rotor type motor as long as it can rotate the impeller 30.

[0037] <Shaft 21> The shaft 21 is cylindrical. The shaft 21 is rotatably supported on the support sleeve 170 by the first bearing 171 and the second bearing 172. As a result, the shaft 21 is rotatably supported on the base portion 12, i.e., the housing 10, about its central axis C1.

[0038] <Rotor 22> The rotor 22 includes a rotor holder 221, a rotor magnet 224, and a shaft fixing member 225. The rotor holder 221 includes a rotor top plate portion 222 and a rotor cylindrical portion 223. The rotor top plate portion 222 is disc-shaped, extending radially from the central axis C1. The rotor cylindrical portion 223 is cylindrical, extending axially downward from the radial outer edge of the rotor top plate portion 222.

[0039] In other words, the motor 20 has a rotor holder 221 that is a covered cylindrical shape extending in the axial direction and has a rotor top plate portion 222 at its upper part.

[0040] The rotor magnet 224 is cylindrical in shape with alternating north and south poles magnetized in the circumferential direction. The rotor magnet 224 may be integrally molded from, for example, a resin containing magnetic powder, or it may be formed by arranging multiple magnets in the circumferential direction and fixing them with resin or the like. The rotor magnet 224 is fixed to the inner circumferential surface of the rotor cylinder portion 223.

[0041] The rotor holder 221 is formed from a magnetic material such as iron or nickel. Thus, the rotor holder 221 functions as a back yoke for the rotor magnet 224. While press-fitting and adhesive bonding are possible methods for fixing the rotor magnet 224 to the rotor cylinder 223, the method is not limited to these. A wide range of methods can be used to firmly fix the rotor magnet 224 to the rotor cylinder 223.

[0042] The rotor top plate portion 222 has a central hole 226, a first fixing hole 227, and a second fixing hole 228. The center of the central hole 226 coincides with the central axis C1, and a shaft fixing member 225 is attached to the central hole 226. The shaft 21 is then fixed to the rotor top plate portion 222 via the shaft fixing member 225. In this way, the shaft 21 and the rotor 22 are fixed together.

[0043] As shown in Figure 3, both the first fixing hole 227 and the second fixing hole 228 are cylindrical in shape and extend in the axial direction. The cross-sectional shape and size of the cut surfaces perpendicular to the axial direction of the first fixing hole 227 and the second fixing hole 228 are the same. The centers of the first fixing hole 227 and the second fixing hole 228 are located on a pitch circle with a common radius centered on the central axis C1, and are arranged alternately in the circumferential direction. The first fixing hole 227 and the second fixing hole 228 are arranged at equal intervals in the circumferential direction.

[0044] The first fixing hole 227 and the second fixing hole 228 are used to insert and fix the first protrusion 313 and the second protrusion 314 of the impeller 30, which will be described later.

[0045] <Stata 23> The stator 23 includes a stator core 231, an insulator 232, and a coil 233. In this case, the stator core 231 has a structure made of laminated electrical steel sheets. Alternatively, the stator core 231 may be a single component formed by powder firing or casting.

[0046] The stator core 231 has a through-hole in its center that penetrates axially when viewed from the axial direction. The support sleeve 170 is fixed inside the through-hole of the stator core 231. The fixing of the stator core 231 and the support sleeve 170 can be, for example, press-fitting, bonding, welding, etc., but is not limited to these. A wide range of fixing methods that can firmly fix the support sleeve 170 and the stator core 231 can be used. The support sleeve 170 is fixed to the bottom plate portion 121 of the base portion 12. Therefore, the stator core 231 is fixed inside the through-hole portion 111 of the housing 10.

[0047] The insulator 232 is, for example, a molded resin body. The insulator 232 covers at least the teeth of the stator core 231. Then, a wire is wrapped around the teeth covered by the insulator 232 from above the insulator 232 to form the coil 233.

[0048] The support sleeve 170 passes through a through hole 240 provided in the substrate 24. This fixes the substrate 24 to the support sleeve 170. As shown in Figure 4, the substrate 24 is positioned axially between the stator 23 and the bottom plate 121. Lead wires 25 are connected to the substrate 24. The lead wires 25 are connected to an external power supply unit, such as a battery. Power from the power supply unit is supplied to the substrate 24 via the lead wires 25. The substrate 24 contains circuits, such as a driver circuit, that supply the appropriate current to each coil 233 at the appropriate timing. The substrate 24 and the coils 233 are connected by a busbar 26.

[0049] <Impeller 30> As shown in Figures 1 and 2, the impeller 30 comprises a cup portion 31 and a plurality of rotor blades 32. The impeller 30 is a molded resin body. The impeller 30 is an axial flow fan that generates airflow in the axial direction.

[0050] <Composition of cup section 31> The cup portion 31 comprises a cup top plate portion 311 and a cup cylindrical portion 312. The cup top plate portion 311 is a disc shape that expands radially. The cup cylindrical portion 312 is a cylinder shape that extends axially downward from the radial outer edge of the cup top plate portion 311. The cup portion 31 is fixed to the outside of the rotor holder 221.

[0051] The cup cylinder portion 312 is in contact with the outer circumferential surface of the rotor cylinder portion 223. The cup portion 31 and the rotor holder 221 may be fixed only to the rotor top plate portion 222 and the cup top plate portion 311, or in addition to the above, the rotor cylinder portion 223 and the cup cylinder portion 312 may also be fixed. This allows for a more secure fixation between the cup portion 31 and the rotor holder 221. In the blower 100 of this embodiment, the axial lower end surface of the cup cylinder portion 312 faces the upper end surface of the side wall portion 122 of the base portion 12 in the axial direction. A gap is formed between the cup cylinder portion 312 and the side wall portion 122 in the axial direction.

[0052] In other words, the impeller 30 has a cup-shaped cylindrical cup portion 31 with a lid that extends axially and has a cup-top portion 311 at its upper part.

[0053] <Fixing impeller 30 to rotor 22> Details of how the cup portion 31 of the impeller 30 and the rotor holder 221 of the rotor 22 are fixed together will be described with reference to the drawings. Figure 8 is a cross-sectional view including the fixing portion between the impeller 30 and the rotor holder 221. Figure 9 is a perspective view showing the impeller 30 and the rotor holder 221 separated.

[0054] As shown in Figure 8, the rotor holder 221 is fixed inside the cup portion 31. As shown in Figures 8 and 9, the cup top portion 311 of the cup portion 31 has a plurality of first protrusions 313 and a plurality of second protrusions 314. In the blower 100 of this embodiment, five first protrusions 313 are provided on the cup top portion 311. However, the number of first protrusions 313 is not limited to five. The five first protrusions 313 project axially from the axial lower surface 311a of the cup top portion 311. That is, the cup top portion 311 has a plurality of solid first protrusions 313 that project axially from the axial lower surface. The first protrusions 313 have contact portions 315 that extend radially outward from the axial end.

[0055] The contact portion 315 is formed on the first protrusion 313, but it may also be formed on the second protrusion 314. That is, at least a portion of the first protrusion 313 and the second protrusion 314 has a contact portion 315 that extends radially outward.

[0056] The first projection 313 is inserted into a first fixing hole 227 provided in the rotor top plate portion 222 of the rotor holder 221. That is, the rotor top plate portion 222 has a first fixing hole 227 that penetrates axially and into which the first projection 313 fits. The first projection 313 is positioned in contact with the first fixing hole 227. A contact portion 315 is formed on the portion of the first projection 313 that penetrates the first fixing hole 227. The contact portion 315 contacts the edge of the first fixing hole 227 on the axial lower surface 222a of the rotor top plate portion 222. That is, the contact portion 315 contacts the lower surface of the rotor top plate portion 222.

[0057] This makes it difficult for the cup portion 31 to separate from the rotor holder 221. In other words, the impeller 30 and the rotor holder 221 can be firmly fixed with a simple configuration. This improves workability and reduces the effort and time required for manufacturing. The contact portion 315 can be configured to expand outward after the first protrusion 313 is inserted into the first fixing hole 227. For example, the rotor holder 221 can be molded using an insert molding method when molding the cup portion 31. However, it is not limited to this method. For example, the tip of the first protrusion 313, which is made of resin, may be heated and melted to form the contact portion 315.

[0058] Furthermore, in the blower 100 of this embodiment, five second protrusions 314 are provided on the cup top plate portion 311. However, the number of second protrusions 314 is not limited to five. The five second protrusions 314 protrude axially from the axial lower surface 311a of the cup top plate portion 311. The second protrusions 314 have through holes 316 that penetrate axially. That is, the second protrusions 314 protrude axially from the axial lower surface 311a of the cup top plate portion 311 and penetrate through to the upper surface of the cup top plate portion 311.

[0059] The second projection 314 is inserted into a second fixing hole 228 provided in the rotor top plate portion 222 of the rotor holder 221. The outer circumferential surface of the second projection 314 is positioned in contact with the inner circumferential surface of the second fixing hole 228. In other words, the rotor holder 221 has a second fixing hole 228 that penetrates axially and into which the second projection 314 fits.

[0060] This configuration allows air inside the motor 20 to flow out through the through-hole 316 of the second protrusion 314. This improves the heat dissipation efficiency of the motor 20 and allows the impeller 30 and rotor holder 221 to be fixed with a simple configuration. As a result, workability is improved, and the time and effort required for manufacturing can be reduced.

[0061] In the blower 100 of this embodiment, the cross-sectional shape perpendicular to the axial direction of the portion of the first protrusion 313 located inside the first fixing hole 227 is the same as the cross-sectional shape perpendicular to the axial direction of the portion of the second protrusion 314 located inside the second fixing hole 228. Furthermore, the cross-sectional shape perpendicular to the axial direction of the first fixing hole 227 is the same as the cross-sectional shape perpendicular to the axial direction of the second fixing hole 228.

[0062] In the blower 100 of this embodiment, the first protrusion 313 and the second protrusion 314 are arranged alternately in the circumferential direction, and adjacent first protrusions 313 and second protrusions 314 are arranged at equal intervals in the circumferential direction. With this configuration, the first protrusion 313 can be inserted into the second fixing hole 228, and the second protrusion 314 can be inserted into the first fixing hole 227.

[0063] In addition, the first protrusions 313 and the second protrusions 314 may not be arranged alternately. Even in such cases, it is possible to insert the first protrusion 313 into the second fixing hole 228 and the second protrusion 314 into the first fixing hole 227. That is, when at least one of the first protrusions 313 is inserted into the second fixing hole 228, at least one of the second protrusions 314 may be inserted into the first fixing hole 227.

[0064] This configuration allows the impeller 30 and rotor holder 221 to be fixed together even if they are misaligned in the circumferential direction. This improves workability and reduces the time and effort required for manufacturing. Furthermore, by rotating and fixing the impeller 30 and rotor holder 221 in the circumferential direction, any misalignment in the circumferential weight balance between the impeller 30 and rotor holder 221 can be compensated for. This optimizes the rotational balance of the impeller 30, thereby reducing vibration and noise.

[0065] <Rotating blade 32> Multiple rotor blades 32 are provided on the outer circumferential surface of the cup portion 31. The multiple rotor blades 32 are arranged in the circumferential direction. In the blower 100 of this embodiment, the rotor blades 32 are arranged at equal intervals on the outer surface of the cup portion 31. The rotor blades 32 are integrally molded with the cup portion 31. The upper part of the rotor blades 32 is positioned forward in the rotational direction relative to the lower part. As a result, when the impeller 30 rotates, an airflow Afw having velocity components in the axial downward and circumferential directions is generated. The airflow Afw is rectified by the stationary blades 13, which convert the circumferential velocity component into a component directed axially downward. The rectified airflow Afw is then discharged to the outside of the blower 100 from the exhaust port 114 of the through hole 111.

[0066] <Cover member 40> The cover member 40 is attached to the recess 14. The cover member 40 is positioned to overlap the lead wire passage portion 161 provided at the lower end in the axial direction. The cover member 40 closes the lead wire passage portion 161. As a result, the lead wire 25 is prevented from unintentionally coming out of the lead wire passage portion 161. In other words, the cover member 40 closes a part of the radial opening 151 of the lead wire housing groove 15. The depth of the recess 14 is the same as the thickness of the cover member 40. As a result, when the cover member 40 is attached, the outer surface of the cover member 40 becomes flush with the parts of the side surfaces 110a and 110b of the housing 10 other than the recess 14. Note that the depth of the recess 14 may be greater than or equal to the thickness of the cover member 40. In other words, the recess 14 is formed in at least the portion of the side surface 110 of the main body portion 11 to which the cover member 40 is attached, and the depth of the recess 14 is greater than or equal to the thickness of the cover member 40.

[0067] To explain further, the recess 14 is formed across two side surfaces 110a and 110b that sandwich the corner 112a, whose circumferential position coincides with the notch 123. The cover member 40 is positioned across the two side surfaces 110a and 110b that sandwich the corner 112a, whose circumferential position coincides with the lead wire housing groove 15.

[0068] With this configuration, the cover member 40 is positioned across the two sides 110a and 110b that sandwich the corner 112a, making it difficult for the cover member 40 to detach from the main body 11. This prevents the lead wires 25 from detaching from the lead wire housing grooves 15.

[0069] In the blower 100 of this embodiment, the cover member 40 is attached in a position that covers the lead wire passage portion 161 adjacent to the lead wire retaining portion 16 provided at the lower end in the axial direction. However, it is not limited to this. For example, the cover member 40 may be attached in a position that covers the lead wire passage portion 161 at the upper end. In this case, the cover member 40 may also be attached in a position that covers the lead wire passage portion 161 at the lower end. That is, the cover member may be provided at least at both ends in the axial direction.

[0070] Furthermore, the cover member 40 may be attached in a position that covers a portion of the lead wire housing groove 15 other than the lead wire passage portion 161. Moreover, the cover member 40 may cover the entire axial length of the opening 151 of the lead wire housing groove 15.

[0071] Furthermore, the cover member 40 may be made of resin, and the fixing method can include fixing by fitting the protrusions into the recesses, adhesive bonding, or welding. In addition, any other method that allows the cover member 40 to be attached and detached and firmly fixed can be widely adopted. Moreover, the cover member 40 may be made of tape-like material.

[0072] By attaching the cover member 40, it is possible to prevent the lead wire 25 from coming out of the lead wire housing groove 15. In addition, by positioning the cover member 40 in the recess 14, the outer surface of the cover member 40 can be made flush with the side surface 110 of the main body 11. As a result, the unevenness of the mounting surface of the main body 11 is suppressed, and the cover member 40 is prevented from coming out when sliding.

[0073] <Regarding the wiring of lead wire 25> During the assembly of the blower 100, the lead wire 25 is attached to the substrate 24. After the substrate 24 is fixed to the support sleeve 170, the lead wire 25 is pulled radially outward from the side wall portion 122 of the bottom plate portion 121. The lead wire 25 is then routed axially downward along the bottom plate portion 121 through the gap between the second stator vane 132 and the bottom plate portion 121. The lead wire 25 then crosses the through hole portion 111 radially axially below the second stator vane 132 and is positioned in the groove 181. The tip of the lead wire 25 positioned in the groove 181 is positioned outside the main body portion 11 at one end. Subsequently, the lead wire 25 is passed through lead wire passage portions 161 provided at the lower and upper ends in the axial direction and housed inside the lead wire housing groove 15. In this state, the cover member 40 is attached to the recess 14. This prevents the lead wires 25 from protruding out of the lead wire housing groove 15.

[0074] <Use of blower 100> Figure 10 is a schematic perspective view showing an example of an external device 200 utilizing a blower 100. The external device 200 shown in Figure 10 is a rack-type server device. The external device 200 has a mounting section 201 on its rear surface 200b for introducing airflow to cool the internal equipment. The blower 100 is attached to the mounting section 201. The blower 100 is attached to the mounting section 201 by moving in the axial direction. The airflow Afw generated by the operation of the blower 100 forces outside air into the external device 200. This cools the memory, CPU, and other equipment located inside the external device 200.

[0075] In the blower 100, by attaching the cover member 40 to the recess 14, the outer circumferential surface of the part of the main body 11 other than the recess 14 becomes flush with the outer circumferential surface of the cover member 40. This prevents the cover member 40 from catching on the inner circumferential surface of the mounting part 201 when the blower 100 is attached to the mounting part 201 of the external device 200. As a result, even if the mounting part 201 is shaped to be in close contact with the main body 11, it is possible to prevent the cover member 40 from coming off or the lead wire 25 from being pinched between the external device 200 and the main body 11. Consequently, because the mounting part 201 is in close contact with the main body 11, airflow leakage is suppressed, and the airflow Afw from the blower 100 can be efficiently drawn into the interior of the external device 200. For example, when the airflow Afw is used to cool the equipment inside the external device 200, it is possible to increase the cooling efficiency.

[0076] In this embodiment, a rack-type server device is given as the external device 200, but it is not limited to this. The blower device 100 of this embodiment can be widely used in devices that have a configuration for introducing airflow into the interior.

[0077] <Summary> The present invention has the following configuration.

[0078] (1) A housing having a through-hole that penetrates along a central axis extending vertically, A motor is positioned in the through-hole of the housing, The housing comprises an impeller positioned inside the through-hole and rotated by the motor to generate an axially flowing airflow into the through-hole, The aforementioned housing is The main body portion having the through hole portion, A base portion is disposed inside the through-hole, The main body has a plurality of stationary vanes that protrude inward from the inner wall of the through-hole, The outer surface of the main body has a concave lead wire housing groove that extends in the axial direction. Multiple stator vanes are arranged in the circumferential direction, A blower in which the stationary vanes adjacent to the lead wire housing groove in the circumferential direction face the base portion radially with a gap in between, and the remaining stationary vanes are connected to the base portion.

[0079] (2) The base portion is A disc-shaped bottom plate portion is positioned below the through-hole portion and supports the motor, It has a side wall portion that extends upward from the outer edge of the bottom plate portion, The side wall portion is discontinuous in the circumferential direction and has a notch through which the motor's lead wires are pulled out. The blower according to (1), wherein the stator vanes adjacent to the notch in the radial direction face the base portion radially with a gap in between, and the remaining stator vanes are connected to the side wall portion.

[0080] (3) A lead wire retaining portion is formed in the main body and covers a part of the opening in a direction intersecting the axial direction of the lead wire housing groove, The blower according to (1) or (2), having a lead wire passage portion that connects the lead wire housing groove to the outside in a portion adjacent to the lead wire retaining portion in the circumferential direction.

[0081] (4) The device further includes a cover member that closes a portion of the radial opening of the lead wire housing groove, The blower according to any one of (1) to (3), wherein a recess having a depth greater than or equal to the thickness of the cover member is formed in at least the portion of the outer surface of the main body to which the cover member is attached.

[0082] (5) The main body is square in shape when viewed in the axial direction. The circumferential position of the lead wire housing groove coincides with the corner of the main body, The recess is formed across two sides that straddle the corner where the circumferential position overlaps with the lead wire housing groove. The blower according to any one of (1) to (4), wherein the cover member is arranged across two sides that straddle a corner whose circumferential position overlaps with the lead wire housing groove.

[0083] (6) The lead wire housing groove is formed along the entire axial length of the main body, The blower according to (3), wherein the lead wire retaining portion and the lead wire passing portion are provided at least at both ends in the axial direction.

[0084] (7) The lead wire housing groove is formed along the entire axial length of the main body, The blower according to (4), wherein the recess and cover member are provided at least at both ends in the axial direction.

[0085] (8) The impeller is, It has a cup-shaped cup section with a top plate at the top and a lidded cylindrical cup section that extends in the axial direction, The aforementioned motor is It has a rotor top plate at the top and is a covered cylindrical shape extending in the axial direction, and has a rotor holder fixed inside the cup portion, The aforementioned cup top plate is, Multiple solid first protrusions projecting axially from the axial lower surface, It has a plurality of cylindrical second protrusions that project axially from the axial lower surface and penetrate through the upper surface of the cup top plate, The rotor top plate portion is, A first fixing hole that penetrates axially and into which the first protrusion is fitted, A blower according to any one of (1) to (7), having a second fixing hole that penetrates axially and into which the second projection is fitted.

[0086] (9) At least a portion of the first and second protrusions has a contact portion that extends radially outward, The blower according to (8), wherein the contact portion is in contact with the lower surface of the rotor top plate portion.

[0087] (10) The cross-sectional shape perpendicular to the axial direction of the portion of the first protrusion that is positioned inside the first fixing hole is the same as the cross-sectional shape perpendicular to the axial direction of the portion of the second protrusion that is positioned inside the second fixing hole. The cross-sectional shape of the first fixing hole perpendicular to the axial direction and the cross-sectional shape of the second fixing hole perpendicular to the axial direction are the same. The blower according to (8) or (9), wherein at least one of the first protrusions is inserted into the second fixing hole. [Explanation of symbols]

[0088] 100 Blower 200 External device 200b back 201 Mounting section 10 Housing 11 Main body 110 Side view 110a side 110b side 111 Through hole 111 Through hole 112 corners 112a Corner 113 Air intake 114 Exhaust vent 115 gap 12 Base section 120 Top 121 Bottom plate part 122 Side wall section 123 Notch 13 Static Wings 131 First Stable Wing 132 Second Stable Wing 14 recess 141 Base 15 Lead wire housing groove 151 Aperture 16 Lead wire retaining part 161 Lead wire passage section 17 Shaft support part 170 Support Sleeve 171 First bearing 172 Second bearing 18 Bottom side 181 Recessed groove 20 motors 21 Shaft 22 rotors 221 Rotor holder 222 Rotor top plate section 223 Rotor cylinder section 224 Rotor Magnet 225 Shaft fixing member 226 Center hole 227 1st fixing hole 228 2nd fixing hole 23 Status 231 Stator Core 232 Insulators 233 coils 24 circuit boards 240 through holes 25 Lead wires 26 Bus Bar 30 Impeller 31 Cup section 311 Cup top section 312 Cup tube section 313 1st protrusion 314 Second protrusion 315 Contact area 316 Through hole 32 Moving blade 40 Cover component Afw airflow

Claims

1. A housing having a through-hole that penetrates along a central axis extending vertically, A motor is positioned in the through-hole of the housing, The housing comprises an impeller positioned inside the through-hole and rotated by the motor to generate an axially flowing airflow into the through-hole, The aforementioned housing is The main body portion having the through hole portion, A base portion is disposed inside the through-hole, The main body has a plurality of stationary vanes that protrude inward from the inner wall of the through-hole, The outer surface of the main body has a concave lead wire housing groove that extends in the axial direction. Multiple stator vanes are arranged in the circumferential direction, A blower in which the stationary vanes adjacent to the lead wire housing groove in the circumferential direction face the base portion radially with a gap in between, and the remaining stationary vanes are connected to the base portion.

2. The base portion is A disc-shaped bottom plate portion is positioned below the through-hole portion and supports the motor, It has a side wall portion that extends upward from the outer edge of the bottom plate portion, The side wall portion is discontinuous in the circumferential direction and has a notch through which the motor's lead wires are pulled out. The blower according to claim 1, wherein the stator vanes adjacent to the notch in the radial direction face the base portion radially with a gap in between, and the remaining stator vanes are connected to the side wall portion.

3. A lead wire retaining portion is formed in the main body and covers a part of the opening in a direction intersecting the axial direction of the lead wire housing groove, The blower according to claim 1, further comprising a lead wire passage portion connecting the lead wire housing groove to the outside in a portion adjacent to the lead wire retaining portion in the circumferential direction.

4. The device further includes a cover member that closes a portion of the radial opening of the lead wire housing groove, The blower according to claim 1, wherein a recess having a depth greater than or equal to the thickness of the cover member is formed in at least the portion of the outer surface of the main body to which the cover member is attached.

5. The main body is square in shape when viewed in the axial direction. The circumferential position of the lead wire housing groove coincides with the corner of the main body, The recess is formed across two sides that straddle the corner where the circumferential position overlaps with the lead wire housing groove. The blower according to claim 4, wherein the cover member is arranged across two sides that straddle a corner whose circumferential position overlaps with the lead wire housing groove.

6. The lead wire housing groove is formed along the entire axial length of the main body, The blower according to claim 3, wherein the lead wire retaining portion and the lead wire passing portion are provided at least at both ends in the axial direction.

7. The lead wire housing groove is formed along the entire axial length of the main body, The blower according to claim 4, wherein the recess and cover member are provided at least at both ends in the axial direction.

8. The impeller is, It has a cup-shaped cup section with a top plate at the top and a lidded cylindrical cup section that extends in the axial direction, The aforementioned motor is It has a rotor top plate at the top and is a covered cylindrical shape extending in the axial direction, and has a rotor holder fixed inside the cup portion, The aforementioned cup top plate is, Multiple solid first protrusions projecting axially from the axial lower surface, It has a plurality of cylindrical second protrusions that project axially from the axial lower surface and penetrate through the upper surface of the cup top plate, The rotor top plate portion is, A first fixing hole that penetrates axially and into which the first protrusion is fitted, The blower according to claim 1, further comprising a second fixing hole that penetrates axially and into which the second protrusion is fitted.

9. At least a portion of the first and second protrusions has a contact portion that extends radially outward, The blower according to claim 8, wherein the contact portion is in contact with the lower surface of the rotor top plate portion.

10. The cross-sectional shape perpendicular to the axial direction of the portion of the first protrusion that is positioned inside the first fixing hole is the same as the cross-sectional shape perpendicular to the axial direction of the portion of the second protrusion that is positioned inside the second fixing hole. The cross-sectional shape of the first fixing hole perpendicular to the axial direction and the cross-sectional shape of the second fixing hole perpendicular to the axial direction are the same. The blower according to claim 8 or 9, wherein at least one of the first protrusions is inserted into the second fixing hole.

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