Air supply device

Abstract

A blower device has a motor arranged in the through-hole portion of a housing, and an impeller arranged inside the through-hole portion of the housing and rotated by the motor to generate an air flow. The housing has a plurality of vanes protruding inward from the inner wall of the through-hole portion of the main body portion. A concave lead receiving groove extending in the axial direction is formed in the outer surface of the main body. The plurality of vanes are arranged in the circumferential direction. The vanes adjacent to the lead receiving groove in the circumferential direction are opposed to the base portion in the radial direction with a gap therebetween, and the remaining vanes are connected to the base portion.

Description

Technical Field

[0001] This invention relates to an air supply device. Background Technology

[0002] In existing air supply devices, airflow is generated by rotating an impeller by supplying power to the coil of a motor disposed inside the housing (see Patent Document 1, etc.). In this type of air supply device, power is supplied to the coil of the motor via a lead wire.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-145780 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] When mounting the motor into the housing, the wiring of the leads needs to be designed, and sometimes the wiring of the leads is difficult to work with.

[0008] Therefore, the object of the present invention is to provide an air supply device that can reduce the time and workload required for wiring the lead wires when installing the air supply device.

[0009] Solution for solving the problem

[0010] An exemplary air supply device of the present invention comprises: a housing having a through hole extending 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, which generates an airflow flowing axially in the through hole by being driven to rotate by the motor. The housing comprises: a main body having the through hole; a base disposed inside the through hole; and a plurality of stator blades protruding inwardly from the inner wall of the through hole of the main body. A concave wire receiving groove extending axially is formed on the outer surface of the main body. The plurality of stator blades are arranged circumferentially. The stator blades adjacent to the wire receiving groove in the circumferential direction are radially opposed to the base with a gap, and the remaining stator blades are connected to the base.

[0011] Invention Effects

[0012] According to the exemplary invention, the time and workload required for wiring can be reduced. Attached Figure Description

[0013] Figure 1 This is a perspective view of an example of an air supply device viewed from above.

[0014] Figure 2 Viewed from below Figure 1 A three-dimensional view of the air supply device shown.

[0015] Figure 3 yes Figure 1 An exploded perspective view of the air supply device shown.

[0016] Figure 4 Therefore, including Figure 1 The cross-sectional view of the central axis of the air supply device shown is cut.

[0017] Figure 5 This is a 3D view of the shell.

[0018] Figure 6 This is a top view of the casing.

[0019] Figure 7 This is the rear view of the casing.

[0020] Figure 8 It is a cross-sectional view including the fixed parts of the impeller and rotor support.

[0021] Figure 9 It is a three-dimensional view showing the impeller separated from the rotor support.

[0022] Figure 10 This is a schematic perspective view showing an example of an external device utilizing an air supply device. Detailed Implementation

[0023] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in this specification, the direction parallel to the center of rotation of the impeller 30 of the air supply device 100, i.e., the central axis C1, is referred to as the "axial direction," the direction orthogonal to the central axis C1 is referred to as the "radial direction," and the direction along an arc centered on the central axis C1 is referred to as the "circumferential direction." It should be noted that the circumferential direction is not limited to the tangent direction of the arc, but also includes directions inclined at a certain angle (e.g., 45°) relative to the tangent direction. For example, the direction along the outer circumferential surface of the main body 11 of the housing 10 is sometimes also referred to as the circumferential direction, even in directions orthogonal to the axial direction.

[0024] Furthermore, in this specification, the shape and positional relationship of each part of the air supply device 100 are described by setting the axial direction as vertical, the air intake 113 of the housing 10 as upward, and the exhaust port 114 as downward. It should be noted that the vertical direction is a name used only for description and does not limit the positional relationship and direction of the air supply device 100 in the use state.

[0025] (First Implementation)

[0026] Figure 1 This is a perspective view of an example of the air supply device 100 as viewed from above. Figure 2 Viewed from below Figure 1 A perspective view of the air supply device 100 shown. Figure 3 yes Figure 1 An exploded perspective view of the air supply device 100 shown. Figure 4 Therefore, including Figure 1 The cross-sectional view of the air supply device 100 shown is cut along the central axis C1. Figure 5 This is a three-dimensional view of the casing 10. Figure 6 This is a top view of the housing 10. Figure 7 This is a rear view of housing 10.

[0027] <Air supply device 100>

[0028] like Figures 1 to 4 As shown, the air supply device 100 of this embodiment includes a housing 10, a motor 20, an impeller 30, and a cover member 40. The housing 10 has a through hole 111 extending along a central axis C1 extending vertically. The motor 20 is disposed in the through hole 111 of the housing 10. Furthermore, the impeller 30 is disposed inside the through hole 111 of the housing 10 and is driven to rotate by the motor 20. As a result, an airflow Afw is generated that flows axially in the through hole 111. Hereinafter, details of each part of the air supply device 100 will be described in sequence.

[0029] <Shell 10>

[0030] The housing 10 has a main body 11, a base 12, a stator vane 13, and a shaft support 17. The housing 10 is a monolithic resin body. Details will be described later, but the housing 10 serves as a mounting component when the air supply device 100 is installed on the external device 200.

[0031] <Main Body Section 11>

[0032] The main body 11 is cuboid in shape, and square when viewed axially. The main body 11 has a through hole 111. The main body 11 has four side surfaces. Furthermore, corner portions 112 are formed in the portions sandwiched between adjacent side surfaces 110. Figure 1 , Figure 2 As shown, the main body 11 has four corner portions 112, each of which extends along the central axis C1.

[0033] The through-hole 111, when viewed axially, is located at the center of the main body 11 and is a cylindrical shape that extends axially. The centerline of the through-hole 111 coincides with the central axis C1. The upper end of the through-hole 111 is the intake port 113, and the lower end is the exhaust port 114. Furthermore, as the impeller 30 rotates, the air drawn in through the intake port 113 becomes airflow Afw and is discharged through the exhaust port 114.

[0034] A recess 14, which is recessed from other parts, is formed on the side surface 110a and side surface 110b of one of the four corner portions 112 located on the main body portion 11. The recess 14 is formed to span across the side surface 110a and side surface 110b that sandwich the corner portion 112a. Figure 1 , Figure 2 As shown, in the air supply device 100 of this embodiment, the recess 14, in a top view, extends from the corner 112a of the side surface 110a to approximately the center of the side surface 110a. Similarly, in a top view, the recess 14 extends from the corner 112a of the side surface 110b to approximately the center of the side surface 110b. Furthermore, the recess 14 is continuously formed from the upper end to the lower end of the main body portion 11 in the axial direction. It should be noted that the depth of the recess 14 is equal to or greater than the thickness of the cover member 40.

[0035] Details will be described later, but a cover member 40 is installed in the recess 14. In the case where the cover member 40 is installed at both ends in the axial direction, the recess 14 may be provided at least at both ends in the axial direction.

[0036] Furthermore, the main body 11 has a lead wire storage groove 15 and a lead wire pressing portion 16 formed on the side surface 110a. The lead wire storage groove 15 is formed on the side surface 110a. The lead wire storage groove 15 is formed at the end of the side surface 110a near the corner 112a. The lead wire storage groove 15 is a concave shape that is recessed radially inward from the side surface 110a, and is formed to extend from the upper end to the lower end of the main body 11 in the axial direction. That is, a concave lead wire storage groove 15 extending in the axial direction is formed on the side surface 110 of the main body 11. That is, the lead wire storage groove 15 is formed along the entire axial length of the main body 11.

[0037] The lead wire 25, which supplies power to the motor 20 (described later), is disposed in the lead wire storage slot 15. That is, the lead wire storage slot 15 has a cross-sectional shape and size that can accommodate the lead wire 25.

[0038] like Figure 1 , Figure 2 As shown, the lead pressing portion 16 is provided at the upper and lower ends of the lead receiving groove 15 along the axial direction. The lead pressing portion 16 covers a portion of the opening of the lead receiving groove 15 in the direction intersecting the axial direction, that is, a portion of the opening formed on the side surface 110a. That is, the lead pressing portion 16 is formed on the main body portion 11 and covers a portion of the opening 151 of the lead receiving groove 15 in the direction intersecting the axial direction. The lead pressing portion 16 presses the lead 25 that is about to move outward from the lead receiving groove 15, and suppresses the lead 25 from moving outward. To further explain, the outer surface of the lead pressing portion 16 is on the same plane as the recess 14 of the side surface 110a.

[0039] The lead wire pressing portion 16 is beam-shaped, extending from one end of the opening of the lead wire receiving groove 15 towards the other end. Furthermore, a gap is formed between the top end of the lead wire pressing portion 16 and the other end of the opening 151 of the lead wire receiving groove 15; this gap is the lead wire passing portion 161. The lead wire 25 is inserted into the lead wire receiving groove 15 via the lead wire passing portion 161. The lead wire passing portion 161 is a gap that connects the lead wire receiving groove 15 to the outside at a portion adjacent to the lead wire pressing portion 16 in the circumferential direction. That is, the lead wire pressing portion 16 and the lead wire passing portion 161 are provided at least at both ends in the axial direction.

[0040] With this configuration, the lead wire 25 can be easily routed toward the side of the main body 11 opposite to the base 12. Furthermore, it prevents the lead wire 25 stored in the lead wire storage groove 15 from detaching from the main body 11. Therefore, the lead wire 25 can be neatly organized during the handling and installation of the air supply device 100, thus improving workability.

[0041] A recessed groove 181 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 receiving groove 15 to the axially lower end of the through hole 111. A lead wire 25 is inserted into the groove 181. That is, the lead wire 25, which traverses the through hole 111, is routed into the groove 181 and into the lead wire receiving groove 15.

[0042] <Base 12>

[0043] The base 12 is located inside the through hole 111 of the main body 11. Further, the base 12 is located at the lower axial end of the through hole 111. The base 12 has a base plate 121 and a sidewall 122. The base plate 121 is circular. The base plate 121 is located at the lower part of the through hole 111 and supports the motor 20. The outer peripheral surface of the base plate 121 and the inner peripheral surface of the through hole 111 are arranged radially with a gap. The gap between the through hole 111 and the base 12 is such that the airflow Afw (refer to...) Figure 4 ) Exhaust port 114 that is discharged to the outside.

[0044] The sidewall portion 122 protrudes upward along the axial direction from the outer edge of the base plate portion 121. The sidewall portion 122 is formed in the circumferential direction, and a notch portion 123 that is discontinuous in the circumferential direction is provided in a portion of the sidewall portion 122.

[0045] The notch 123 is formed to overlap with the corner 112a in the circumferential direction. Furthermore, the circumferential position of the lead wire receiving groove 15 is formed at the end of the corner 112a side of the side surface 110a arranged next to the corner 112a which overlaps with the notch 123 in the circumferential direction.

[0046] The base plate 24, described later, houses the motor 20 within the base 12. Furthermore, the lead wire 25, connected to the base plate 24, passes through the exhaust port 114 and is disposed inside the lead wire storage groove 15. A notch 123 is provided in the sidewall portion 122, through which the lead wire 25 is pulled out radially outward from the base 12. That is, the lead wire 25 is pulled out through the notch 123. Therefore, compared to the case where the lead wire 25 is pulled out through the upper part of the sidewall portion 122, it is possible to prevent the lead wire 25 from being routed at an unreasonable angle.

[0047] <Jingye 13>

[0048] The housing 10 has eleven stator blades 13 that protrude radially inward from the inner wall of the through hole 111 of the main body 11. It should be noted that the stator blades 13 are not limited to eleven. That is, multiple stator blades 13 can protrude inward from the inner wall of the through hole 111 of the main body 11. The eleven stator blades 13 are arranged at equal intervals in the circumferential direction. The eleven stator blades 13 are arranged at equal intervals in the circumferential direction, but are not limited to this. That is, multiple stator blades 13 can be arranged circumferentially. The stator blades 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 blades 13 rectify the circumferentially flowing airflow Afw into an axially oriented airflow.

[0049] Of the eleven stationary blades 13, ten are first stationary blades 131, and one is a second stationary blade 132. The stationary blade 13 located radially adjacent to the notch 123 is the second stationary blade 132. To further explain, from a top view, the stationary blade 13 adjacent circumferentially to the lead wire receiving groove 15 is the second stationary blade 132. The second stationary blade 132 is radially opposite to the base 12 via the gap 115, and the remaining stationary blade 13, namely the first stationary blade 131, is connected to the base 12.

[0050] Therefore, the lead wire 25, which is pulled out through the notch 123, can be wired through the gap 115. Moreover, the lead wire 25 is positioned below the second stator 132 and is wired across the exhaust port 114. In this way, the lead wire 25 can be easily wired by having the gap 115.

[0051] By constructing the stator blade 13 in this way, the wiring workability of the lead wire 25 used to supply power to the motor 20 can be improved, and the amount of work and time required to manufacture the air supply device 100 can be reduced. In addition, the lead wire 25 can be accurately wired in a defined position, thus suppressing contact between the lead wire 25 and rotating parts such as the motor 20 and impeller 30.

[0052] Furthermore, the radially inner end of the first stator vane 131 is connected to the sidewall portion 122 of the base 12. Thus, the first stator vane 131 straightens the airflow Afw and also acts as a rib to hold the base 12 in place. Moreover, the base 12 is held securely to the main body 11 by the ten first stator vanes 131.

[0053] <Shaft support section 17>

[0054] The shaft support portion 17 is mounted on the base portion 12. Furthermore, the shaft support portion 17 holds the stator 23 of the motor 20 and supports the support shaft 21 so that it can rotate. The shaft support portion 17 includes a support sleeve 170, a first bearing 171, and a second bearing 172.

[0055] When viewed axially, the support sleeve 170 is fixed to the central portion of the axial upper surface 120 of the base plate portion 121 of the base 12. It should be noted that the support sleeve 170 can be fixed to the base plate portion 121 by, for example, pressing, bonding, or welding, but is not limited to these methods. Any method that can securely fix the support sleeve 170 to the base plate portion 121 can be widely used.

[0056] The support sleeve 170 is a cylindrical shape extending axially. A stator 23 is fixed to the outer surface of the support sleeve 170. Inside the support sleeve 170, a first bearing 171 and a second bearing 172 are fixed axially spaced apart. The centers of the first bearing 171 and the second bearing 172 overlap with the central axis C1. In the air supply device 100 of this embodiment, the first bearing 171 and the second bearing 172 are ball bearings, but are not limited thereto. For example, fluid bearings, sliding bearings, and other structures that can support the support shaft 21 rotatably relative to the support sleeve 170 can be widely used as bearings.

[0057] <Motor 20>

[0058] Motor 20 includes a shaft 21, a rotor 22, a stator 23, a base plate 24, and leads 25. In motor 20, by supplying current to the coils 233 of the stator 23 (described later), the rotor 22, fixed to the shaft 21, rotates together with the shaft 21 around the central axis C1. Motor 20 is an external rotor type motor in which the rotor 22 rotates radially outside the stator 23, but it can also be an internal rotor type motor as long as the impeller 30 can be rotated.

[0059] <Axis 21>

[0060] Shaft 21 is cylindrical. Shaft 21 is supported by a first bearing 171 and a second bearing 172 and is rotatable relative to the support sleeve 170. Thus, shaft 21 is supported so that it can rotate about the central axis C1 relative to the base 12, i.e., the housing 10.

[0061] <Rotor 22>

[0062] The rotor 22 has a rotor support 221, a rotor magnet 224, and a shaft fixing member 225. The rotor support 221 has a rotor top plate portion 222 and a rotor cylinder portion 223. The rotor top plate portion 222 is a circular plate extending radially from the central axis C1. The rotor cylinder portion 223 is a cylinder extending axially downward from the radial outer edge of the rotor top plate portion 222.

[0063] That is, the motor 20 has a rotor support 221, which is a covered cylindrical shape having a rotor top plate portion 222 on its upper part and extending axially.

[0064] The rotor magnet 224 is a cylindrical shape with N and S poles alternately magnetized in the circumferential direction. The rotor magnet 224 can be, for example, integrally molded from a resin mixed with magnetic powder, or formed by arranging multiple magnets circumferentially and fixing them with resin or the like. The rotor magnet 224 is fixed to the inner circumferential surface of the rotor cylinder 223.

[0065] The rotor support 221 is formed of a magnetic material such as iron or nickel. Thus, the rotor support 221 serves as a back yoke for the rotor magnet 224. It should be noted that methods for securely fixing the rotor magnet 224 to the rotor cylinder 223 include pressing and bonding, but are not limited to these. A wide range of methods can be used to securely fix the rotor magnet 224 to the rotor cylinder 223.

[0066] 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 overlaps with the central shaft C1, and a shaft fixing member 225 is installed in the central hole 226. Furthermore, the shaft 21 is fixed to the rotor top plate portion 222 via the shaft fixing member 225. Thus, the shaft 21 and the rotor 22 are fixed.

[0067] like Figure 3 As shown, both the first fixing hole 227 and the second fixing hole 228 are cylindrical shapes extending axially. The cross-sectional shapes and sizes of the first fixing hole 227 and the second fixing hole 228, when cut perpendicular to the axial direction, are identical. Furthermore, 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 they are arranged alternately in the circumferential direction. Moreover, the first fixing hole 227 and the second fixing hole 228 are arranged at equal intervals in the circumferential direction.

[0068] The first protrusion 313 and the second protrusion 314 of the impeller 30, described later, are respectively inserted into and fixed in the first fixing hole 227 and the second fixing hole 228.

[0069] <Stator 23>

[0070] The stator 23 has a stator core 231, an insulator 232, and a coil 233. Here, the stator core 231 is a structure formed by stacking electromagnetic steel sheets. Alternatively, the stator core 231 can also be a single component formed by powder sintering, casting, or other processes.

[0071] The stator core 231 has a through hole extending axially through its central portion when viewed from the axial direction. Furthermore, a 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 achieved by, for example, pressing, bonding, or welding, but is not limited to these methods. Any fixing method that can securely fix the support sleeve 170 to the stator core 231 can be widely adopted. The support sleeve 170 is fixed to the base plate portion 121 of the base 12. Therefore, the stator core 231 is fixed within the through hole portion 111 of the housing 10.

[0072] The insulator 232 is, for example, a molded resin body. The insulator 232 at least covers the teeth of the stator core 231. Furthermore, a wire is wound from the top of the insulator 232 towards the teeth covered by the insulator 232, thereby forming a coil 233.

[0073] A support sleeve 170 is disposed through a through hole 240 in the substrate 24. Thus, the substrate 24 is fixed to the support sleeve 170. Figure 4 As shown, the substrate 24 is axially disposed between the stator 23 and the base plate 121. Leads 25 are connected to the substrate 24. The leads 25 are connected to an external power source such as a battery. Power from the power source is supplied to the substrate 24 via the leads 25. The substrate 24 contains, for example, a drive circuit that supplies appropriate current to each coil 233 at appropriate timing. Furthermore, the substrate 24 and the coils 233 are connected via a busbar 26.

[0074] <Impeller 30>

[0075] like Figure 1 , Figure 2 As shown, the impeller 30 includes a cup portion 31 and multiple moving 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.

[0076] <Composition of Cup Part 31>

[0077] The cup portion 31 includes a cup top plate portion 311 and a cup cylinder portion 312. The cup top plate portion 311 is a circular plate that extends radially. The cup cylinder portion 312 is a cylinder 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 support 221.

[0078] The cup portion 312 contacts the outer peripheral surface of the rotor cylinder portion 223. It should be noted that the cup portion 31 can be fixed to the rotor support 221 by fixing only the rotor top plate portion 222 and the cup top plate portion 311; alternatively, the rotor cylinder portion 223 and the cup portion 312 can also be fixed. This provides a more secure fixation between the cup portion 31 and the rotor support 221. In the air supply device 100 of this embodiment, the axially lower end face of the cup portion 312 and the upper end face of the side wall portion 122 of the base 12 are axially opposed. A gap is formed between the cup portion 312 and the side wall portion 122 in the axial direction.

[0079] That is, the impeller 30 has a cup portion 31, which is a covered cylindrical shape having a cup top plate portion 311 at the top and extending axially.

[0080] <Impeller 30-axis rotor 22 fixing>

[0081] The details of fixing the cup portion 31 of the impeller 30 to the rotor support 221 of the rotor 22 are explained with reference to the accompanying drawings. Figure 8 It is a cross-sectional view including the fixed part of the impeller 30 and the rotor support 221. Figure 9 This is a three-dimensional view showing the impeller 30 separated from the rotor support 221.

[0082] like Figure 8 As shown, the rotor support 221 is fixed inside the cup portion 31. Figure 8 , Figure 9 As shown, the cup top plate portion 311 of the cup portion 31 has a plurality of first protrusions 313 and a plurality of second protrusions 314. In the air supply device 100 of this embodiment, five first protrusions 313 are provided in the cup top plate portion 311. It should be noted that the number of first protrusions 313 is not limited to five. The five first protrusions 313 protrude axially from the axial lower surface 311a of the cup top plate portion 311. That is, the cup top plate portion 311 has a plurality of solid first protrusions 313 protruding axially from the axial lower surface. The first protrusions 313 have contact portions 315 that extend radially outward from the axial end.

[0083] It should be noted that 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 extending radially outward.

[0084] The first protrusion 313 is inserted into the first fixing hole 227 of the rotor top plate portion 222 provided in the rotor support 221. That is, the rotor top plate portion 222 has a first fixing hole 227 that extends axially for the first protrusion 313 to be inserted. The first protrusion 313 is configured to contact the first fixing hole 227. A contact portion 315 is formed in the portion of the first protrusion 313 that extends through 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.

[0085] Therefore, the cup portion 31 is not easily separated from the rotor support 221. That is, the impeller 30 and rotor support 221 can be securely fixed with a simple configuration. This improves workability and reduces the amount of work and time required for manufacturing. It should be noted that the contact portion 315 only needs to be configured to extend outwards after the first protrusion 313 is inserted into the first fixing hole 227. For example, the rotor support 221 can be inserted during the molding of the cup portion 31. However, it is not limited to this method. For example, the contact portion 315 can be formed by heating and melting the tip of the first protrusion 313, which is formed of resin.

[0086] Furthermore, in the air supply device 100 of this embodiment, five second protrusions 314 are provided on the cup top plate portion 311. It should be noted that the number of second protrusions 314 is not limited to five. The five second protrusions 314 protrude axially from the axially lower surface 311a of the cup top plate portion 311. Each second protrusion 314 has a through hole 316 extending axially. That is, the second protrusions 314 protrude axially from the axially lower surface 311a of the cup top plate portion 311 and extend through the upper surface of the cup top plate portion 311.

[0087] The second protrusion 314 is inserted into the second fixing hole 228 provided in the rotor top plate portion 222 of the rotor support 221. The outer peripheral surface of the second protrusion 314 is configured to contact the inner peripheral surface of the second fixing hole 228. That is, the rotor support 221 has a second fixing hole 228 that extends axially for the second protrusion 314 to be inserted.

[0088] This configuration allows air inside the motor 20 to flow out through the through hole 316 in the second protrusion 314. This improves the heat dissipation efficiency of the motor 20 and allows for a simple mounting of the impeller 30 and rotor support 221. Consequently, workability is improved, reducing the amount of work and time required for manufacturing.

[0089] In the air supply device 100 of this embodiment, the cross-sectional shape orthogonal to the axial direction of the portion of the first protrusion 313 disposed inside the first fixing hole 227 is the same as the cross-sectional shape orthogonal to the axial direction of the portion of the second protrusion 314 disposed inside the second fixing hole 228. Furthermore, the cross-sectional shape orthogonal to the axial direction of the first fixing hole 227 is the same as the cross-sectional shape orthogonal to the axial direction of the second fixing hole 228.

[0090] In the air supply device 100 of this embodiment, the first protrusion 313 and the second protrusion 314 are alternately arranged 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.

[0091] It should be noted that sometimes the first protrusion 313 and the second protrusion 314 are not alternately configured. Even in this case, 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. That is, when at least one first protrusion 313 is inserted into the second fixing hole 228, at least one second protrusion 314 can be inserted into the first fixing hole 227.

[0092] With this configuration, the impeller 30 and rotor support 221 can be fixed even when they are circumferentially misaligned. This improves operability and reduces the amount of work and time required for manufacturing. Furthermore, by fixing the impeller 30 and rotor support 221 by rotating them circumferentially, any deviation in the circumferential weight balance of the impeller 30 and rotor support 221 can be offset. This optimizes the rotational balance of the impeller 30 and reduces vibration and noise.

[0093] <Moving Leaf 32>

[0094] A plurality of moving blades 32 are provided on the outer peripheral surface of the cup portion 31. The plurality of moving blades 32 are arranged circumferentially. In the air supply device 100 of this embodiment, the moving blades 32 are arranged at equal intervals on the outer surface of the cup portion 31. The moving blades 32 are integrally formed with the cup portion 31. The upper part of the moving blades 32 is positioned in front of the lower part in the rotation direction. As a result, when the impeller 30 rotates, an airflow Afw with velocity components in the axial downward direction and the circumferential direction is generated. The circumferential velocity component is converted into a component in the axial downward direction by the stationary blade 13, thereby rectifying the airflow Afw. Moreover, the rectified airflow Afw is discharged from the exhaust port 114 of the through hole portion 111 to the outside of the air supply device 100.

[0095] <Cover Component 40>

[0096] The cover member 40 is mounted on the recess 14. Furthermore, the cover member 40 is configured to overlap with the lead wire passage portion 161 located at the axial lower end. The lead wire passage portion 161 is blocked by the cover member 40. As a result, it is possible to prevent the lead wire 25 from accidentally detaching from the lead wire passage portion 161. That is, the cover member 40 blocks a portion of the radial opening 151 of the lead wire receiving groove 15. Moreover, the depth of the recess 14 is the same as the thickness of the cover member 40. Therefore, when the cover member 40 is installed, the outer surface of the cover member 40 is on the same plane as the portion of the side surfaces 110a and 110b of the housing 10 other than the recess 14. It should be noted that the depth of the recess 14 may also be greater than or equal to the thickness of the cover member 40. That is, the recess 14 is formed on at least the portion of the side surface 110 of the main body portion 11 where the cover member 40 is mounted, and the depth of the recess 14 is greater than or equal to the thickness of the cover member 40.

[0097] To further explain, the recess 14 is formed to span the two side surfaces 110a and 110b of the corner 112a that overlaps with the notch 123 in a circumferential position. The cover member 40 is arranged to span the two side surfaces 110a and 110b of the corner 112a that overlaps with the lead wire storage groove 15 in a circumferential position.

[0098] With this configuration, the cover member 40 is positioned to span the two sides 110a and 110b that sandwich the corner portion 112a, thus making it difficult for the cover member 40 to detach from the main body portion 11. This, in turn, prevents the lead wire 25 from detaching from the lead wire storage groove 15.

[0099] It should be noted that in the air supply device 100 of this embodiment, the cover member 40 is installed at a position covering the lead wire passage portion 161 adjacent to the lead wire pressing portion 16 located at the lower end in the axial direction. However, it is not limited to this. For example, the cover member 40 may be installed at a position covering the lead wire passage portion 161 at the upper end. In this case, the cover member 40 may also be installed at a position covering the lead wire passage portion 161 at the lower end. That is, the cover member may also be provided at least at both ends in the axial direction.

[0100] Furthermore, regarding the cover member 40, it may be installed at a location other than the lead wire passage portion 161 that covers a portion of the lead wire storage groove 15. Moreover, the cover member 40 may also cover the entire axial length of the opening 151 of the lead wire storage groove 15.

[0101] Furthermore, the cover member 40 can be a resin component, and its fixing method is to fix it by embedding the protrusion into the recess, such as by bonding or welding. In addition, even with other methods, methods that allow for detachment and secure fixing of the cover member 40 can be widely adopted. Moreover, the cover member 40 can also be a strip-shaped component.

[0102] By installing the cover member 40, the lead wire 25 can be prevented from detaching from the lead wire storage groove 15. Furthermore, by positioning the cover member 40 within 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. This suppresses unevenness on the mounting surface of the main body 11, thus preventing the cover member 40 from detaching during sliding.

[0103] <Regarding the wiring of lead 25>

[0104] When assembling the air supply device 100, the lead wire 25 is mounted on the base plate 24. Then, after fixing the base plate 24 to the support sleeve 170, the lead wire 25 is pulled radially outward from the side wall portion 122 of the base plate portion 121. Then, the lead wire 25 is routed axially downward along the base plate portion 121 from the gap between it and the base plate portion 121 of the second stationary vane 132. Then, the lead wire 25 passes radially through the through hole portion 111 axially downward of the second stationary vane 132 and is disposed in the groove 181. Then, one end of the lead wire 25 disposed in the groove 181 is disposed outside the main body portion 11. Afterward, the lead wire 25 passes through the lead wire passage portion 161 provided at the lower and upper ends axially and is stored inside the lead wire storage groove 15. In this state, the cover member 40 is mounted on the recess 14. This prevents the lead wire 25 from protruding outward from the lead wire storage groove 15.

[0105] <Utilization of the air supply device 100>

[0106] Figure 10 This is a schematic perspective view showing an example of an external device 200 utilizing the air supply device 100. Figure 10 The external device 200 shown is a rack-mount server device. The external device 200 has a mounting portion 201 on its rear side 200b, which is used to introduce airflow for cooling internal equipment. An air supply device 100 is mounted in the mounting portion 201. The air supply device 100 is mounted to the mounting portion 201 by axial movement. External air is forced into the external device 200 by the airflow Afw generated by the operation of the air supply device 100. As a result, devices such as memory and CPU located inside the external device 200 are cooled.

[0107] In the air supply device 100, by installing the cover member 40 in the recess 14, the outer peripheral surface of the portion of the main body 11 other than the recess 14 becomes the same plane as the outer peripheral surface of the cover member 40. Therefore, when the air supply device 100 is installed on the mounting portion 201 of the external device 200, the cover member 40 is prevented from getting stuck on the inner peripheral surface of the mounting portion 201. Thus, even if the mounting portion 201 is designed to fit snugly against the main body 11, the cover member 40 is prevented from falling off or the lead wire 25 from being clamped between the external device 200 and the main body 11. As a result, the mounting portion 201 fits snugly against the main body 11, thus suppressing airflow leakage, thereby efficiently drawing the airflow Afw generated by the air supply device 100 into the interior of the external device 200. For example, when using the airflow Afw to cool the equipment inside the external device 200, cooling efficiency can be improved.

[0108] It should be noted that, in this embodiment, rack-mount server devices can be listed as external devices 200, but are not limited to them. The air supply device 100 of this embodiment can be widely used in devices that have a configuration that allows airflow to enter the interior.

[0109] Summary

[0110] The present invention has the following structure. (1)

[0112] An air supply device, the air supply device having:

[0113] The housing has a through hole extending along a central axis that extends vertically;

[0114] A motor is disposed in the through-hole portion of the housing; and

[0115] An impeller, disposed inside the through-hole of the housing, generates an axial airflow within the through-hole by being driven to rotate by the motor.

[0116] The housing has:

[0117] The main body has the through hole portion;

[0118] The base is disposed inside the through hole; and

[0119] Multiple stationary blades protrude inward from the inner wall of the through hole in the main body.

[0120] A concave lead wire receiving groove extending along the axial direction is formed on the outer surface of the main body.

[0121] The plurality of the aforementioned still blades are arranged in the circumferential direction.

[0122] The stationary blades adjacent to the lead wire receiving groove in the circumferential direction are radially opposed to the base with a gap, and the remaining stationary blades are connected to the base. (2)

[0124] According to the air supply device described in (1), wherein,

[0125] The base has:

[0126] A circular base plate is disposed below the through hole to support the motor; and

[0127] The sidewall portion extends upward from the outer edge of the base plate portion.

[0128] The sidewall portion is discontinuous in the circumferential direction and has a notch for pulling out the motor lead wire.

[0129] The stationary blades adjacent to the notch in the radial direction are opposed to the base in the radial direction with a gap, and the remaining stationary blades are connected to the sidewall portion. (3)

[0131] According to the air supply device described in (1) or (2), wherein,

[0132] The air supply device has:

[0133] A lead wire pressing portion is formed on the main body to cover a portion of the opening in the direction intersecting the axial direction of the lead wire receiving groove; and

[0134] The lead wire passing section connects the lead wire receiving groove to the outside at a portion adjacent to the lead wire pressing section in the circumferential direction. (4)

[0136] According to any one of (1) to (3) the air supply device, wherein,

[0137] The air supply device also has a cover member that blocks a portion of the radial opening of the lead wire receiving groove.

[0138] At least a portion of the outer surface of the main body on which the cover member is mounted has a recess with a depth greater than or equal to the thickness of the cover member. (5)

[0140] According to any one of (1) to (4) the air supply device, wherein,

[0141] The main body is square when viewed axially.

[0142] The circumferential position of the lead wire storage groove overlaps with the corner of the main body.

[0143] The recess is formed by spanning two sides of the corner that overlaps with the lead wire storage groove in the circumferential direction.

[0144] The cover component is arranged on both sides of the corner that overlaps with the lead wire storage groove in the circumferential position. (6)

[0146] According to the air supply device described in (3), wherein,

[0147] The lead wire storage groove is formed along the entire axial length of the main body.

[0148] The lead wire pressing portion and the lead wire passing portion are provided at least at both ends in the axial direction. (7)

[0150] According to the air supply device described in (4), wherein,

[0151] The lead wire storage groove is formed along the entire axial length of the main body.

[0152] The recess and cover components are provided at least at both ends in the axial direction. (8)

[0154] The air supply device according to any one of (1) to (7), wherein,

[0155] The impeller has a cup portion, which is a covered cylindrical shape with a cup top plate at the top and extending axially.

[0156] The motor has a rotor support, which is a covered cylindrical shape with a rotor top plate at the top and extending axially, and is fixed inside the cup portion.

[0157] The cup top plate has:

[0158] Multiple solid first protrusions protrude axially from the axially lower surface; and

[0159] Multiple cylindrical second protrusions protrude axially from the lower axial surface and penetrate through the upper surface of the cup top plate.

[0160] The rotor top plate portion has:

[0161] A first fixing hole, extending axially, is provided for the insertion of the first protrusion; and

[0162] The second fixing hole extends axially to allow the second protrusion to be inserted. (9)

[0164] According to the air supply device described in (8), wherein,

[0165] At least a portion of the first protrusion and the second protrusion have contact portions that extend radially outward.

[0166] The contact portion contacts the lower surface of the rotor top plate. (10)

[0168] According to the air supply device described in (8) or (9), wherein,

[0169] The cross-sectional shape orthogonal to the axial direction of the portion of the first protrusion disposed inside the first fixing hole is the same as the cross-sectional shape orthogonal to the axial direction of the portion of the second protrusion disposed inside the second fixing hole.

[0170] The cross-sectional shape of the first fixing hole, orthogonal to the axial direction, is the same as that of the second fixing hole, orthogonal to the axial direction.

[0171] When at least one of the first protrusions is inserted into the second fixing hole, at least one of the second protrusions is inserted into the first fixing hole.

[0172] Explanation of reference numerals in the attached figures:

[0173] 100: Air supply device;

[0174] 200: External device;

[0175] 200b: Reverse side;

[0176] 201: Installation Department;

[0177] 10: Shell;

[0178] 11: Main body;

[0179] 110: Side view;

[0180] 110a: Side view;

[0181] 110b: Side view;

[0182] 111: Through hole section;

[0183] 111: Through hole;

[0184] 112: Corner;

[0185] 112a: Corner;

[0186] 113: Intake port;

[0187] 114: Exhaust port;

[0188] 115: Gap;

[0189] 12: Base;

[0190] 120: Upper surface;

[0191] 121: Base plate section;

[0192] 122: Side wall portion;

[0193] 123: Notch;

[0194] 13: Quiet Leaf;

[0195] 131: First still leaf;

[0196] 132: Second still leaf;

[0197] 14: concave part;

[0198] 141: Bottom;

[0199] 15: Lead wire storage slot;

[0200] 151: Opening;

[0201] 16: Lead wire pressing section;

[0202] 161: Lead wire passage section;

[0203] 17: Shaft support section;

[0204] 170: Support sleeve;

[0205] 171: First bearing;

[0206] 172: Second bearing;

[0207] 18: Lower surface;

[0208] 181: Groove;

[0209] 20: Motor;

[0210] 21: Axis;

[0211] 22: Rotor;

[0212] 221: Rotor support;

[0213] 222: Rotor top plate;

[0214] 223: Rotor cylinder section;

[0215] 224: Rotor magnet;

[0216] 225: Shaft fixing component;

[0217] 226: Center hole;

[0218] 227: First fixing hole;

[0219] 228: Second fixing hole;

[0220] 23: Stator;

[0221] 231: Stator core;

[0222] 232: Insulator;

[0223] 233: Coil;

[0224] 24: Substrate;

[0225] 240: Through hole;

[0226] 25: Lead wire;

[0227] 26: Busbar;

[0228] 30: Impeller;

[0229] 31: Cup section;

[0230] 311: Cup top plate;

[0231] 312: Cup-shaped part;

[0232] 313: First protrusion;

[0233] 314: Second protrusion;

[0234] 315: Contact Department;

[0235] 316: Through hole;

[0236] 32: Moving leaves;

[0237] 40: Cover components;

[0238] Afw: airflow.

Claims

1. An air supply device, the air supply device comprising: The housing has a through hole extending along a central axis that extends vertically; A motor is disposed in the through hole portion of the housing; and An impeller, disposed inside the through-hole of the housing, generates an axial airflow within the through-hole by being driven to rotate by the motor. The housing has: The main body has the through hole portion; The base is disposed inside the through hole; and Multiple stationary blades protrude inward from the inner wall of the through hole in the main body. A concave lead wire receiving groove extending along the axial direction is formed on the outer surface of the main body. The plurality of the aforementioned still blades are arranged in the circumferential direction. The stationary blades adjacent to the lead wire receiving groove in the circumferential direction are radially opposed to the base with a gap, and the remaining stationary blades are connected to the base.

2. The air supply device according to claim 1, wherein, The base has: A circular base plate is disposed below the through hole to support the motor; and The sidewall portion extends upward from the outer edge of the base plate portion. The sidewall portion is discontinuous in the circumferential direction and has a notch for pulling out the motor lead wire. The stationary blades adjacent to the notch in the radial direction are opposed to the base in the radial direction with a gap, and the remaining stationary blades are connected to the sidewall portion.

3. The air supply device according to claim 1, wherein, The air supply device has: A lead wire pressing portion is formed on the main body portion to cover a portion of the opening in the direction intersecting the axial direction of the lead wire storage groove; and The lead wire passing section connects the lead wire receiving groove to the outside at a portion adjacent to the lead wire pressing section in the circumferential direction.

4. The air supply device according to claim 1, wherein, The air supply device also has a cover member that blocks a portion of the radial opening of the lead wire receiving groove. At least a portion of the outer surface of the main body on which the cover member is mounted has a recess with a depth greater than or equal to the thickness of the cover member.

5. The air supply device according to claim 4, wherein, The main body is square when viewed axially. The circumferential position of the lead wire storage groove overlaps with the corner of the main body. The recess is formed by spanning two sides of the corner that overlaps with the lead wire storage groove in the circumferential direction. The cover component is arranged on both sides of the corner that overlaps with the lead wire storage groove in the circumferential position.

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

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

8. The air supply device according to claim 1, wherein, The impeller has a cup portion, which is a covered cylindrical shape with a cup top plate at the top and extending axially. The motor has a rotor support, which is a covered cylindrical shape with a rotor top plate at the top and extending axially, and is fixed inside the cup portion. The cup top plate has: Multiple solid first protrusions protrude axially from the axial lower surface; as well as Multiple cylindrical second protrusions protrude axially from the lower axial surface and penetrate through the upper surface of the cup top plate. The rotor top plate portion has: A first fixing hole, extending axially, is provided for the insertion of the first protrusion; and The second fixing hole extends axially to allow the second protrusion to be inserted.

9. The air supply device according to claim 8, wherein, At least a portion of the first protrusion and the second protrusion have contact portions that extend radially outward. The contact portion contacts the lower surface of the rotor top plate.

10. The air supply device according to claim 8 or 9, wherein, The cross-sectional shape orthogonal to the axial direction of the portion of the first protrusion disposed inside the first fixing hole is the same as the cross-sectional shape orthogonal to the axial direction of the portion of the second protrusion disposed inside the second fixing hole. The cross-sectional shape of the first fixing hole, orthogonal to the axial direction, is the same as that of the second fixing hole, orthogonal to the axial direction. When at least one of the first protrusions is inserted into the second fixing hole, at least one of the second protrusions is inserted into the first fixing hole.

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