JP2010019183A - Axial flow fan and series axial flow fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the removal of a plurality of lead wires guided in approximate parallel to a center axis from a guide part which is provided on the outside face of the housing of an axial flow fan. <P>SOLUTION: A first axial flow fan 2 of a series axial flow fan 1 has the guide part 5 all over the length of a first housing 23. The guide part 5 has a guide groove 51 extending in parallel to the center axis J1, and a first protruded portion 521 and a second protruded portion 522 virtually covering part of the guide groove 51 while crossing the guide groove 51. Between the first and second protruded portions 521, 522, a linear clearance is formed which is inclined to a direction parallel to the center axis J1. The lead wires are arranged in the guide groove 51 via the clearance. A first front end position of the first protruded portion 521 is closer to the side of the guide groove 51 at the side of the second protruded portion 522 than a second front end position of the second protruded portion 522. This prevents the removal of the lead wires from the guide part 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an axial fan having a plurality of lead wires and a series axial fan in which a plurality of axial fans are connected.

  Conventionally, cooling fans for cooling electronic components have been provided inside the housings of various electronic devices, resulting from an increase in the amount of heat generated due to higher performance of electronic components, miniaturization of the housing, etc. As the arrangement density increases, it is required to improve the static pressure-air volume characteristics of the cooling fan. In recent years, as a cooling fan that secures sufficient static pressure and air volume, a series axial fan in which a plurality of fans are connected in series is used. In a series axial fan, a plurality of lead wires are drawn from each fan. Connected to external power supply.

  In the counter-rotating axial fan of Patent Document 1, the power supply wiring is counter-rotated between the discharge-side end of the first single axial fan and the suction-side end of the second single axial fan. Derived from within the axial fan. Further, the power supply wiring is guided to the suction side end of the first single axial flow fan through the outer surface of the case of the first single axial flow fan, and pulled out to the outside of the counter-rotating axial flow fan. It is. The first single axial fan has a linear gap that is parallel to the central axis on the outer side of the case and at the end on the suction side of the case. When pulled out, the power supply wiring is fixed on the outer surface of the case through the gap.

The fan frame disclosed in Patent Document 2 has an outer frame which is a fan housing, a base, and a rib connecting the outer frame and the base, and a plurality of power supply lines are arranged on the rib along the extending direction of the rib. A groove-shaped guide slot is provided. The outer frame is provided with an arrange slot that communicates with the guide slot and through which the power supply line is passed, and the shape of the arrange slot on the side surface of the outer frame is a straight line parallel to the central axis. The arrangement slot is located in the circumferential direction away from the guide slot, and even when an external force is applied to the power supply line, the power supply line is prevented from being detached from the arrangement slot.
JP 2004-278370 A Utility Model Registration No. 3128352

  By the way, in the single axial fan shown in Patent Document 1, the shape of the gap provided on the case on the outer surface is a straight line parallel to the central axis, so that it is parallel to the central axis on the outer surface of the case. The power supply wiring to be guided is easily detached from the outer surface through the gap. Similarly, in the fan frame shown in Patent Document 2, since the shape of the arrangement slot on the side surface of the outer frame is a straight line parallel to the central axis, the power supply line is easily detached from the arrangement slot. In the axial fan, the lead wire is detached from the housing, so that the lead wire is entangled with other devices in the device in which the axial fan is mounted.As a result, the lead wire is separated from the circuit board or the lead wire is There is a risk of disconnection.

  The present invention has been made in view of the above problems, and prevents a plurality of lead wires guided substantially parallel to the central axis on the outer surface of the housing of the axial fan from coming off from the guide portion of the housing. The purpose is to do.

  The invention according to claim 1 is an axial fan, an impeller having a plurality of blades, a motor unit that generates an air flow by rotating the impeller about a central axis, and an outer periphery of the impeller And a housing having a guide portion that guides a plurality of lead wires connected to the motor portion on the outer surface substantially parallel to the central axis, wherein the guide portion includes the plurality of lead wires. A guide groove, a first protrusion protruding from one side of the guide groove toward the other, and a second protrusion protruding from the other side of the both sides toward the one, The first protrusion and the second protrusion substantially cover at least a part of the guide groove from the one side to the other side of the both sides together with the plurality of lead wires, and the first protrusion and the second protrusion 2 protrusions and A gap is formed between the first protrusion and the second protrusion so as to longitudinally cut a region covered by the guide groove along the guide groove. The first tip is the position of the tip of the first protrusion. The position is closer to the other of the two side portions than the second tip position, which is the position of the tip of the second protrusion, or the first tip position and the second tip position are the same from the other of the two side portions. The first tip position is different from the second tip position in a direction parallel to the central axis and the first tip position is closer to the one of the both side portions than the second tip position. And the distance between the first tip position and the second tip position when the guide portion is viewed in a direction parallel to the central axis is less than the minimum diameter of the plurality of lead wires. is there.

  The invention according to claim 2 is the axial fan according to claim 1, wherein the minimum width of the gap is 80% or more and less than 100% of the maximum diameter of the plurality of lead wires.

  A third aspect of the present invention is the axial fan according to the first or second aspect, wherein the outer shape of the housing is a substantially quadrangular prism shape, and the guide portion is provided at a corner portion of the housing.

  Invention of Claim 4 is an axial-flow fan in any one of Claim 1 thru | or 3, Comprising: Each of the said 1st protrusion part and the said 2nd protrusion part protrudes toward the other protrusion part, The gap between the first protrusion and the second protrusion is a straight line that is inclined with respect to a direction parallel to the central axis.

  A fifth aspect of the present invention is the axial fan according to the fourth aspect, wherein the first tip position is closer to the other of the both side portions than the second tip position.

  A sixth aspect of the present invention is the axial fan according to any one of the first to third aspects, wherein the gap has a portion extending substantially perpendicular to a direction parallel to the central axis.

  The invention according to claim 7 is the axial fan according to claim 6, wherein the first protrusion and the second protrusion are arranged in a direction parallel to the central axis, and the gap is A portion between the other of the two side portions and the tip of the first protruding portion, a portion between the first protruding portion and the second protruding portion, and the one of the both side portions and the second It has a site | part between the said front-end | tips of a protrusion part.

  The invention according to claim 8 is the axial fan according to any one of claims 1 to 7, wherein the guide groove, the first protrusion, and the second protrusion are the plurality of lead wires. It is provided at the end of the housing that is drawn out from the outer surface of the housing to the outside of the housing.

  The invention according to claim 9 is an in-line axial fan, and the axial fan according to any one of claims 1 to 7 and another connected to the axial fan along the central axis An axial fan is provided, and a plurality of lead wires of the other axial fan are guided on the outer surface of the axial fan by the guide unit together with the lead wires of the axial fan.

  The invention according to claim 10 is an inline axial fan, comprising: the axial fan according to claim 8; and another axial fan connected to the axial fan along the central axis. The axial fan in the vicinity of a boundary between an end portion of the housing of the axial fan facing the other axial fan and an end portion of the housing of the other axial fan facing the axial fan. A lead wire outlet for guiding the plurality of lead wires and the plurality of lead wires of the other axial fan from the inside of the axial fan and the other axial fan to the outer surface of the housing is provided, The plurality of lead wires of the other axial fan are guided by the guide portion together with the plurality of lead wires of the axial fan.

  According to the present invention, it is possible to prevent a plurality of lead wires from being detached from the guide portion. In the invention of claim 2, the lead wire is disposed in the guide groove through the gap without being excessively pressed, and the lead wire is reliably prevented from coming off from the housing through the gap. In the invention of claim 4, the lead wire can be easily arranged in the guide groove when the lead wire is attached.

  In the inventions of claims 5 to 7, it is more reliably prevented that the lead wire is detached from the guide portion. In the invention of claim 8, the first projecting portion and the second projecting portion are connected to the outside. By being provided at the end portion on the drawer side of the housing that is pulled out, the lead wire is more stably fixed.

  FIG. 1 is a perspective view showing a serial axial fan 1 according to a first embodiment of the present invention. The serial axial fan 1 is used as a cooling fan for air-cooling electronic devices such as servers. The serial axial fan 1 is connected to the lower side of the first axial fan 2 along the first axial fan 2 disposed on the upper side in FIG. 1 and the central axis J1 of the first axial fan 2. A biaxial fan 3 is provided, and the central axis J 1 coincides with the central axis of the second axial fan 3.

  The serial axial fan 1 is a so-called counter-rotating axial fan, and air is taken in from the upper side in FIG. 1 (that is, the upper side of the first axial fan 2), and the lower side (that is, the second axial flow). An air flow in the direction of the central axis J1 is generated so as to be sent to the lower side of the fan 3. In the following description, in the direction of the central axis J1, the upper side in FIG. 1 that is the side from which air is taken is called the “intake side” or simply “upper side”, and the lower side in FIG. Is called “exhaust side” or simply “lower side”. The expressions “upper” and “lower” do not necessarily coincide with the upper and lower sides with respect to the direction of gravity.

  The first axial fan 2 has two first lead wires 41 that are connected to the first motor unit in the first axial fan 2 and are used for power supply and control signal transmission. The biaxial fan 3 has two second lead wires 42 connected to the second motor unit in the second axial fan 3. The first lead wire 41 and the second lead wire 42 are guided from the lower end of the first housing 23 of the first axial fan 2 and provided on the outer surface 234 of the first housing 23 (details will be described later). .) Is guided substantially parallel to the central axis J1, and is drawn out from the serial axial fan 1. The first lead wire 41 and the second lead wire 42 are bundled by the bundling member 9 above the first housing 23 and connected to an external power source (not shown). In the following description, the two first lead wires 41 and the two second lead wires 42 are collectively referred to as “lead wire group 4” as appropriate, and the first lead wire 41 and the second lead wire 42 are not distinguished. The two lead wires are simply called “lead wires”.

  FIG. 2 is a longitudinal sectional view of the serial axial fan 1 cut along a plane including the central axis J1. The first axial fan 2 includes a first impeller 21, a first motor part 22 that rotates the first impeller 21 around the central axis J1, a first housing 23 that surrounds the outer periphery of the first impeller 21, and a first motor part. The first housing 23 is connected to the first motor unit 22 by the first support rib 24. The first housing 23 is formed together with the first support ribs 24 by resin injection molding. In FIG. 2, for the convenience of illustration, the schematic shapes of the first blade 211 and the first support rib 24 of the first impeller 21 are shown on the left and right of the central axis J1. Further, the first motor unit 22 is shown exaggeratedly large, and illustration of parallel oblique lines with respect to the cross section of each component is omitted. The second axial flow fan 3 is also illustrated by the same method.

  The first impeller 21 is covered with a substantially cylindrical cup 212 that covers the outside of the first motor unit 22, and extends radially outward from the outer surface of the cup 212, and is arranged at a constant pitch in the circumferential direction. A plurality of first blades 211 are provided. The first motor unit 22 includes a first rotor unit 221 that is a rotating body and a first stator unit 222 that is a fixed body, and the first rotor unit 221 is located above the first stator unit 222 along the central axis J1. Located in.

  The first rotor portion 221 includes a substantially cylindrical metal yoke 2211 with a center axis J1 as a center, a substantially cylindrical field magnet 2212 fixed to the inside of the yoke 2211, and an upper center of the yoke 2211. A shaft 2213 projecting downward from the shaft. The first rotor portion 221 is an integral part of the first impeller 21 when the yoke 2211 is covered with the cup 212.

  The first stator portion 222 includes a base portion 2221 having an opening at the center, a substantially cylindrical bearing holding portion 2222 protruding upward from the center of the base portion 2221, an armature 2223 attached to the outer periphery of the bearing holding portion 2222, and A circuit board 2224 electrically connected to the armature 2223 is provided below the armature 2223. The base portion 2221 is fixed to the substantially cylindrical inner surface of the first housing 23 via the first support rib 24 and holds each portion of the first stator portion 222. The armature 2223 is opposed to the field magnet 2212 in the radial direction centered on the central axis J1, and generates a torque centered on the central axis J1 between the armature 2223 and the field magnet 2212. Ball bearings 2225 and 2226, which are bearing mechanisms, are provided at the upper and lower portions in the direction of the central axis J1 inside the bearing holding portion 2222, and the shaft 2213 inserted into the bearing holding portion 2222 can be rotated by the ball bearings 2225 and 2226. Supported.

  The second axial fan 3 has substantially the same shape as the first axial fan 2 inverted up and down, and is centered on the second impeller 31 adjacent to the first impeller 21 and the central axis J1 along the central axis J1. As a second motor part 32 that rotates the second impeller 31, a second housing 33 that surrounds the outer periphery of the second impeller 31, and a plurality of second support ribs 34 that support the second motor part 32. The second housing 33 is connected to the second motor portion 32 by a second support rib 34 and is formed by resin injection molding together with the second support rib 34. The second housing 33 is connected to the first housing 23 along the central axis J1. The second impeller 31 extends from the outer surface of the cup 312 outward in the radial direction about the bottomed substantially cylindrical cup 312 and the central axis J1, and is arranged at a plurality of second pitches arranged at equal pitches in the circumferential direction. A wing 311 is provided.

  The second motor unit 32 has substantially the same structure as the first motor unit 22 and includes a second rotor unit 321 that is a rotating body and a second stator unit 322 that is a fixed body. The stator part 322 is located above the second rotor part 321. The second rotor portion 321 includes a bottomed substantially cylindrical yoke 3211 centered on the central axis J1, a substantially cylindrical field magnet 3212 fixed to the inside of the yoke 3211, and an upper side from the center of the yoke 3211. A protruding shaft 3213 is provided.

  The second stator portion 322 has a base portion 3221, a bearing holding portion 3222 that protrudes downward from the center of the base portion 3221, ball bearings 3225 and 3226 that are held up and down in the bearing holding portion 3222, and an outer periphery of the bearing holding portion 3222. An armature 3223 to be attached and a circuit board 3224 disposed on the upper side of the armature 3223 are provided. The armature 3223 and the field magnet 3212 face each other in the radial direction around the central axis J1 and generate torque.

  In the serial axial fan 1, the first motor unit 22 of the first axial fan 2 rotates the first impeller 21 to generate an air flow in the direction of the central axis J <b> 1, and the second axial fan 3 The two-motor unit 32 rotates the second impeller 31 in the direction opposite to the rotation of the first impeller 21 to generate a flow in the same direction as the air flow by the first impeller 21. Thereby, the static pressure is improved while ensuring a sufficient air volume.

  FIG. 3 is a bottom view of the first axial fan 2 as viewed from the exhaust side, and the first impeller 21 is omitted. As shown in FIG. 3, the lower end 232 of the first housing 23 facing the second axial fan 3 is substantially square, and as shown in FIG. 1, the upper end 231 of the first housing 23 is also substantially square. The outer shape of the first housing 23 connecting the contours of both end portions 231 and 232 has a substantially quadrangular prism shape. As shown in FIG. 3, one of the four corners 233 of the lower end 232 is located at the upper right in FIG. 3 (the corner on the right front side in FIG. 1, and is denoted by reference numeral 233 a). Is provided with a notch-shaped first recess 2331 that is recessed upward. The base portion 2221 supported by the first support rib 24 has a notch 2221a, and the first lead wire 41 connected to the circuit board 2214 is drawn toward the first recess 2331 via the notch 2221a.

  FIG. 4 is a plan view of the second axial fan 3 as viewed from the intake side, and the second impeller 31 is omitted. Similar to the first housing 23 shown in FIG. 3, the upper end 331 of the second housing 33 facing the first axial fan 2 is substantially square, and the lower end 332 is also substantially square as shown in FIG. The external shape of the second housing 33 connecting the contours of both end portions 331 and 332 has a substantially quadrangular prism shape. As shown in FIG. 4, among the four corner portions 333 of the upper end portion 331, one corner portion located at the lower right in FIG. 4 (the corner portion on the right front side in FIG. 1 is denoted by reference numeral 333a). A notch-shaped second recess 3331 that is recessed downward is provided. The base portion 3221 supported by the second support rib 34 has a notch 3221a, and the second lead wire 42 connected to the circuit board 3214 is drawn out toward the second recess 3331 through the notch 3221a.

  FIG. 5 is a perspective view of the first axial fan 2. On the outer surface 234 between the both end portions 231 and 232 of the first housing 23, regions located below the four corner portions 233 and 233 a of the lower end portion 232 (hereinafter, referred to as “corner outer surface 2341”), respectively. A region between two adjacent corner outer surfaces 2341 (hereinafter referred to as “center outer surface 2342”) that is a part of a cylindrical surface centered on the central axis J1 is a plane parallel to the central axis J1. Is done. The above-described guide portion 5 of the first housing 23 is along the corner portion of the upper end portion 231 corresponding to the corner portion 233a on the right front side in FIG. 5 of the lower end portion 232, the corner outer surface 2341 on the right front side, and the corner portion 233a. Provided. That is, the guide portion 5 is provided over the entire length of the first housing 23 at one corner portion of a substantially square columnar outer shape formed by connecting the contours of both end portions 231 and 232 of the first housing 23.

  The guide portion 5 includes a guide groove 51 extending parallel to the central axis J1 over the entire length of the first housing 23, a first protrusion 521 and a second protrusion 522 located on the guide groove 51 at the upper end 231; A plate-like protruding portion 53 (hereinafter referred to as “lower protruding portion 53”) that is located on the guide groove 51 at the lower end portion 232 and is used for locking the lead wire group 4 is provided. In the following description, an edge portion parallel to the central axis J1 located at the boundary between the guide groove 51 and the central outer surface 2342 on the near side in FIG. 5 is referred to as a “first side portion 511”. The edge portion extending in parallel with the central axis J1 on the opposite side is referred to as a “second side portion 512”. The lower protrusion 53 extends from the first side 511 so as to substantially cross the guide groove 51, and a slight gap is provided between the lower protrusion 53 and the second side 512.

  FIG. 6 is an enlarged view showing the first protruding portion 521 and the second protruding portion 522 of the guide portion 5, and also shows the lead wire group 4. As shown in FIG. 6, the first protrusion 521 protrudes toward the second protrusion 522, and the second protrusion 522 protrudes toward the first protrusion 521. That is, each of the first protrusion 521 and the second protrusion 522 protrudes toward the other protrusion. In the guide part 5, the 1st protrusion part 521 and the 2nd protrusion part 522 are made into the plate shape parallel to the direction where the guide groove 51 extends, and adjoins along the external shape of the 1st housing 23 (refer FIG. 5). Further, a part of the guide groove 51 in the extending direction of the guide groove 51 is substantially covered by the first protrusion 521 and the second protrusion 522 so as to cross the guide groove 51.

  The edge of the first protrusion 521 on the second protrusion 522 side and the edge of the second protrusion 522 on the first protrusion 521 side are inclined so as to approach the first side 511 of the guide groove 51 downward. The two edges are parallel to each other. Further, the position of the tip 5211 of the first protrusion 521 on the second protrusion 522 side (hereinafter referred to as “first tip position”) is the position of the tip 5221 of the second protrusion 522 on the first protrusion 521 side. (Hereinafter referred to as “second tip position”) closer to the second side portion 512.

  The gap 541 formed between the first protrusion 521 and the second protrusion 522 is a straight line inclined with respect to a direction parallel to the central axis J1 (see FIG. 5), and the width H1 of the gap 541 That is, the shortest distance between the edge of the first protrusion 521 on the second protrusion 522 side and the edge of the second protrusion 522 on the first protrusion 521 side is one lead wire in the lead wire group 4. Is slightly smaller than the diameter D. Specifically, the width H1 is not less than 80% and less than 100% of the diameter D of the lead wire. When the lead wires have different diameters, the width H1 is 80% or more and less than 100% of the maximum diameter of the lead wire group 4.

  As shown in FIG. 1, in the series axial flow fan 1, the first recess 2331 (see FIG. 3) that is recessed upward at the lower end 232 of the first housing 23 and the upper end 331 of the second housing 33. The second recess 3331 (see FIG. 4) that is recessed downwards leads to the vicinity of the boundary (which may include a boundary) between the lower end 232 of the first housing 23 and the upper end 331 of the second housing 33. An outlet 55 is formed, and the lead wire group 4 is led out from the inside of the first axial fan 2 and the second axial fan 3 onto the outer surface 234 of the first housing 23 by the lead wire outlet 55. Furthermore, the lead wire group 4 is formed on the outer surface 234 of the first housing 23 between the lower protrusion 53 of the guide 5 and the guide groove 51, and between the first protrusion 521 and the second protrusion 522 and the guide groove. 51 is guided substantially parallel to the central axis J <b> 1 through the space 51, and is drawn out of the first housing 23.

  In the guide portion 5, the lead wire group 4 is locked by the lower protruding portion 53 in the vicinity of the lower end portion 232 of the first housing 23, and is locked by the first protruding portion 521 and the second protruding portion 522 at the upper end portion 231. As a result, the lead wire group 4 is fixed on the outer surface 234 of the first housing 23. As described above, since the first tip position of the first projecting portion 521 shown in FIG. 6 is located closer to the second side portion 512 than the second tip position of the second projecting portion 522, the center axis J1 is substantially omitted. The lead wire group 4 guided in parallel is prevented from being detached from the first housing 23 via the gap 541. Thus, by providing the guide part 5, even if it is the serial type axial flow fan 1 in which many lead wires are guided, a lead wire is stably guided.

  When the lead wire group 4 is fixed to the guide portion 5 of the first housing 23, first, in each of the first housing 23 and the second housing 33 before assembly, as shown in FIG. 41 is pulled out from the inside of the first housing 23 through the first recess 2331, and the second lead wire 42 is pulled out from the inside of the second housing 33 through the second recess 3331 as shown in FIG.

  Next, as shown in FIG. 7, the lower end 232 of the first housing 23 and the upper end 331 of the second housing 33 are overlapped with each other. Thereby, the lead wire outlet 55 is formed between the first housing 23 and the second housing 33, and the position of the lead wire group 4 in the lead wire outlet 55 is fixed. As a result, the movement of the lead wire group 4 inside the first housing 23 and the second housing 33 is limited.

  In the lower end portion 232 of the first housing 23, the lead wire group 4 is disposed between the lower protruding portion 53 and the guide groove 51 via a gap between the lower protruding portion 53 and the second side portion 512. Is done. Further, at the upper end portion 231, the lead wires of the lead wire group 4 are passed through the gap 541 one by one while elastically deforming the resin covering portion covering the conducting wires, and the first protruding portion 521 and the second protruding portion 522. And the guide groove 51. As described above, since the width H1 of the gap 541 (see FIG. 6) is set in a range of 80% or more and less than 100% of the lead wire diameter D, the lead wire may be excessively compressed in the gap 541. Is prevented. Through the above operation, the lead wire group 4 is fixed onto the outer surface 234 of the first housing 23 as shown in FIG. Thereafter, the first lead wire 41 and the second lead wire 42 are bundled together by the bundling member 9 above the first housing 23.

  As described above, the structure of the serial axial fan 1 according to the first embodiment and the fixing work of the lead wire group 4 have been described. In the serial axial fan 1, the first tip position of the first protrusion 521 is Since the second projecting portion 522 is closer to the second side portion 512 than the second tip position, the lead wire group 4 guided in a direction substantially parallel to the central axis J1 is prevented from being detached from the guiding portion 5. . Further, even when a force is applied to the lead wire group 4 in the direction away from the guide groove 51, the width H1 of the gap 541 is slightly smaller than the diameter D of the lead wire, so that the lead wire group 4 is separated from the gap. The detachment from the first housing 23 via 541 is more reliably prevented.

  Further, the first protrusion 521 and the second protrusion 522 (and a part of the guide groove 51) are connected to the upper end 231 of the first housing 23, that is, the lead wire group 4 from the outer surface 234 of the first housing 23 to the first. The lead wire group 4 is stably fixed by being provided at the end of the lead-out side that is drawn out of the housing 23. Since the gap 541 of the guide portion 5 is linearly inclined, the work of passing the lead wire through the gap 541 is easily performed when the lead wire is attached, and the lead wire group 4 is easily arranged in the guide groove 51.

  FIG. 8 is a view showing another example of the first protrusion 521 and the second protrusion 522, and corresponds to FIG. Each of the first projecting portion 521 and the second projecting portion 522 of the guide portion 5 has a plate shape parallel to the direction in which the guide groove 51 extends, similarly to the first projecting portion 521 and the second projecting portion 522 shown in FIG. Yes, protruding toward the other protrusion. Further, the gap 541 formed between the first protrusion 521 and the second protrusion 522 is a straight line inclined with respect to a direction parallel to the central axis J1 (see FIG. 1), and the gap 541 is inclined. Thus, the first tip position of the tip 5211 of the first protrusion 521 and the second tip position of the tip 5221 of the second protrusion 522 are different in the direction parallel to the central axis J1.

  In the guide portion 5, the first tip position of the tip 5211 of the first protrusion 521 is closer to the first side 511 of the guide groove 51 than the second tip position of the tip 5221 of the second protrusion 522. That is, the first protrusion 521 and the second protrusion 522 are provided so as not to overlap each other in the direction parallel to the central axis J1.

  The width H1 of the gap 541 is 80% or more and less than 100% of the diameter D of one lead wire in the lead wire group 4. Therefore, the distance H2 between the first tip position of the first protrusion 521 and the second tip position of the second protrusion 522 when the guide part 5 is viewed in a direction parallel to the central axis J1, that is, the first The distance in the direction perpendicular to the central axis J1 between the tip 5211 of the protrusion 521 and the tip 5221 of the second protrusion 522 is smaller than the diameter D of the lead wire. When the lead wires have different diameters, the width H1 of the gap 541 is 80% or more and less than 100% of the maximum diameter of the lead wire group 4.

  In the guide portion 5, the width H <b> 1 of the gap 541 is slightly smaller than the lead wire diameter D, so that the lead wire group 4 is prevented from being detached from the gap 541. Even if the width H1 of the gap 541 is equal to or larger than the lead wire diameter D, the distance H2 is substantially parallel to the central axis J1 if the distance H2 is smaller than the lead wire diameter D. The lead wire group 4 guided in the direction is prevented from being detached from the guide portion 5. When the lead wires have different diameters, the distance H2 is less than the minimum diameter of the lead wire group 4.

  FIG. 9 is a view showing still another example of the first projecting portion 521 and the second projecting portion 522. The shape of the first protrusion 521 and the second protrusion 522 shown in FIG. 9 is substantially the same as that of the first protrusion 521 and the second protrusion 522 shown in FIG. 6, and the first end 5211 of the first protrusion 521 is the first. The tip position is closer to the second side portion 512 of the guide groove 51 than the second tip position of the tip 5221 of the second protrusion 522.

  Further, the first protrusion 521 and the second protrusion 522 shown in FIG. 9 are located farther from each other than the first protrusion 521 and the second protrusion 522 shown in FIG. The width H1 of the gap 541 formed between the two protrusions 522 is made larger than the diameter D of one lead wire in the lead wire group 4. Thereby, when the lead wire group 4 is fixed to the guide portion 5, the lead wires can be easily passed through the gap 541, and the lead wires are prevented from being damaged. When the lead wires have different diameters, the width H1 of the gap 541 is made larger than the maximum diameter of the lead wire group 4.

  In the guide portion 5, the first tip position of the tip 5211 of the first protrusion 521 is closer to the second side portion 512 of the guide groove 51 than the second tip position of the tip 5221 of the second protrusion 522. The line group 4 is prevented from coming off from the guide portion 5.

  FIG. 10 is an enlarged view of a part of the guide section 5 of the serial axial fan according to the second embodiment, and corresponds to FIG. The lead wire group 4 is not shown. The guide part 5 has a first protrusion part 521a and a second protrusion part 522a having shapes different from the first protrusion part 521 and the second protrusion part 522 shown in FIG. 6, and the first protrusion part 521a and the second protrusion part. 522a is arranged slightly spaced apart in a direction parallel to the central axis J1 (see FIG. 1). The other structure of the guide unit 5 is the same as that of the guide unit 5 shown in FIG. 5, and the other structure of the series axial fan according to the second embodiment is the same as that of the series axial fan 1. In the following description, the same components are denoted by the same reference numerals.

  In the guide part 5, the first protrusion 521 a protrudes from the first side 511 of the guide groove 51 toward the second side 512, and the second protrusion 522 a extends from the second side 512 to the first side 511. The edge on the second side 512 side of the first protrusion 521a and the edge on the first side 511 side of the second protrusion 522a are each parallel to the central axis J1. Hereinafter, the edge on the second side 512 of the first protrusion 521a is referred to as the “tip 5211a” of the first protrusion 521a, and the edge on the first side 511 side of the second protrusion 522a is the second protrusion 522a. Called “tip 5221a”.

  In the guide portion 5, the first tip position, which is the position of the tip 5211a of the first protrusion 521a, is higher in the direction perpendicular to the central axis J1 than the second tip position, which is the position of the tip 5221a of the second protrusion 522. Close to the two sides 512. A gap 541a extending along the guide groove 51 from the lower end of the second protrusion 522a to the upper end of the first protrusion 521a is formed around the first protrusion 521a and the second protrusion 522a. The gap 541a extends between the first projecting portion 521a and the second projecting portion 522a substantially perpendicularly to the direction parallel to the central axis J1, and from the one end of the portion 5411 to the second side portion 512 and the first projecting portion 521a. A portion 5412 extending in a direction parallel to the central axis J1 between the protruding portion 521a and the tip 5211a, and between the other end of the portion 5411 between the first side portion 511 and the tip 5221a of the second protruding portion 522a. A portion 5413 extending in a direction parallel to the central axis J1 is provided.

  In the gap 541a, the width H3 of the portion 5411 (that is, the shortest distance between the first protrusion 521a and the second protrusion 522a) in the direction parallel to the central axis J1 (the vertical direction in FIG. 10) is the central axis J1. Are smaller than the widths H4 and H5 of the portions 5412 and 5413 in the direction perpendicular to the horizontal direction (FIG. 10), and the width H3 of the portion 5411 is the diameter of one lead wire in the lead wire group 4 (FIG. 6). Larger than reference). That is, the minimum width of the gap 541a is made larger than the diameter of the lead wire. When the lead wires have different diameters, the minimum width of the gap 541a is slightly larger than the maximum diameter of the lead wire group 4 (the same applies to the third embodiment described later).

  In the series axial fan, the lead wire group 4 is guided substantially parallel to the central axis J1 through the space between the first protrusion 521a and the second protrusion 522a and the guide groove 51, as in FIG. The first protrusion 521a and the second protrusion 522a lock the lead wire group 4 so that the lead wire group 4 is fixed on the outer surface 234 (see FIG. 5) of the first housing 23.

  When the lead wire group 4 is fixed to the guide portion 5, as shown in FIG. 7, the lead wire group 4 is led out from the lead wire outlet 55, and the lead wire group 4 is at the lower end 232 of the first housing 23. It arrange | positions between the lower side protrusion part 53 and guide groove 51 which are provided in this. Then, the lead wires of the lead wire group 4 are passed one by one through the gap 541 a shown in FIG. 10, and the lead wire group 4 is disposed between the first protrusion 521 a and the second protrusion 522 a and the guide groove 51. .

  In the second embodiment, the first protrusion 521a and the second protrusion 522a are arranged in a direction parallel to the central axis J1, and the tip 5211a of the first protrusion 521a is the tip 5221a of the second protrusion 522a. By being closer to the second side portion 512, a gap 541a having a portion 5411 extending perpendicularly to the direction parallel to the central axis J1 is formed, so that it is guided substantially parallel to the central axis J1. It is reliably prevented that the lead wire group 4 is detached from the guide portion 5. Further, since the minimum width of the gap 541a (that is, the width H3) is made larger than the diameter of the lead wire, the lead wire is easily passed through the gap 541a. As a result, the lead wire group 4 is easily fixed on the outer surface 234 of the first housing 23.

  FIG. 11 is an enlarged view of a part of the guide portion 5 of the serial axial fan according to the third embodiment. The guide part 5 has a first protrusion part 521b and a second protrusion part 522b having shapes different from the first protrusion part 521 and the second protrusion part 522 shown in FIG. 6, and the first protrusion part 521b and the second protrusion part. 522b extends toward the other protrusion. The other structure of the guide part 5 is the same as that of the guide part 5 shown in FIG. In the following description, the same components are denoted by the same reference numerals.

  The first projecting portion 521b has a stepped shape in which the width in the direction parallel to the central axis J1 from the first side portion 511 to the second side portion 512 of the guide groove 51 decreases by two steps upward. In addition, the second projecting portion 522b has a stepped shape in which the width in the direction parallel to the central axis J1 from the second side portion 512 of the guide groove 51 toward the first side portion 511 is reduced by two steps downward. Yes. Hereinafter, the edge of the first protruding portion 521b on the second side portion 512 side is referred to as the “tip 5211b” of the first protruding portion 521b, and the edge of the second protruding portion 522b on the first side portion 511 side is referred to as the second protruding portion 522b. Is referred to as “tip 5221b”.

  The first tip position, which is the position of the tip 5211b of the first protrusion 521b, is closer to the second side portion 512 than the second tip position, which is the position of the tip 5221b of the second protrusion 522b. Further, a gap 541b extending from the lower end to the upper end of the first protrusion 521b and the second protrusion 522b is formed between the first protrusion 521b and the second protrusion 522b, and the gap 541b is the first protrusion 521b. In the middle from the lower end to the upper end of the second projecting portion 522b, it goes to the right in FIG. 11 twice. That is, the gap 541b includes three minute portions extending in parallel to the central axis J1 and two other minute portions extending in a direction parallel to the central axis J1 between the three portions. The minimum width of the gap 541b (the minimum of the widths of the five portions) is made larger than the diameter D (see FIG. 6) of one lead wire in the lead wire group 4.

  Also in the third embodiment, since the minimum width of the gap 541b is made larger than the diameter D of the lead wires, the lead wires can be easily placed in the gap 541b when the lead wire group 4 is fixed to the guide groove 51. Passed. Further, since the gap 541b has a portion extending perpendicularly to the direction parallel to the central axis J1, the lead wire group 4 is reliably prevented from coming off the guide portion 5.

  FIG. 12 is a bottom view showing an axial fan 1a according to the fourth embodiment, and FIG. 13 is a side view of the axial fan 1a. As shown in FIG. 12, in the axial fan 1a, the shape of the lower end 232 of the housing 23a is substantially circular. Similarly, the shape of the upper end 231 of the housing 23a shown in FIG. The outer shape of the housing 23a connecting the outlines of 231 and 232 is substantially cylindrical. The structure of the axial fan 1a other than the housing 23a is substantially the same as that of the first axial fan 2 shown in FIG. 5, and the same reference numerals are given to the same components as those of the first axial fan 2 in the following description.

  As shown in FIG. 13, a portion between both end portions 231 and 232 of the housing 23a has a substantially cylindrical shape centering on the central axis J1 (hereinafter, this portion is referred to as a “cylindrical portion”), and an upper end portion. Reference numeral 231 denotes a truncated cone shape whose diameter gradually decreases toward the cylindrical portion (that is, downward), and the lower end portion 232 has a truncated cone shape whose diameter gradually decreases toward the cylindrical portion (that is, upward). It is made into a shape. Hereinafter, the outer surface of the cylindrical portion and the upper end portion 231 and the lower end portion 232 will be referred to as an “outer surface 234a” of the housing 23a. As shown in FIGS. 12 and 13, the lower end 232 is formed with a recess 2332 extending in the radial direction around the central axis J1 and recessed upward from the lower end. As shown in FIG. It is located radially outward of the lower right support rib 24 in FIG.

  As shown in FIG. 14, at the outer edge portion of the upper end portion 231 of the housing 23a, a guide portion 5a for guiding the lead wire group 4 substantially parallel to the central axis J1 is provided on the outer surface 234a (see FIG. 13). The portion 5a includes a guide groove 51a that extends parallel to the central axis J1 and in which the lead wire group 4 is disposed, and a first protrusion 521c and a second protrusion 522c that substantially cover the guide groove 51a. In addition, as shown in FIG. 13, the guide part 5a and the recessed part 2332 are located in a direction parallel to the central axis J1.

  As shown in FIG. 14, the edge of the first protrusion 521c on the second protrusion 522c side and the edge of the second protrusion 522c on the first protrusion 521c side are respectively the first housing 23 shown in FIG. Similar to the protrusions 521 and the second protrusions 522, they are parallel to each other. Furthermore, the first tip position, which is the position of the tip 5211 of the first protrusion 521c, is one of the two side portions 511, 512 of the guide groove 51a than the second tip position, which is the position of the tip 5221 of the second protrusion 522c. It is made close to the side portion 512 on the second projecting portion 522c side.

  Further, the gap 541c formed between the first protrusion 521c and the second protrusion 522c is a straight line inclined with respect to the direction parallel to the central axis J1, and the width H6 of the gap 541, that is, the first The shortest distance between the edge of the protrusion 521c on the second protrusion 522c side and the edge of the second protrusion 522c on the first protrusion 521c is 80% or more and less than 100% of the lead wire diameter. When the lead wires have different diameters, the width H6 of the gap 541 is 80% or more and less than 100% of the maximum diameter of the lead wire group 4.

  In the axial fan 1a, the first protrusion 521c and the second protrusion 522c lock the lead wire group 4, so that the lead wire group 4 is fixed on the outer surface 234a of the housing 23a as shown in FIG. Is done.

  When the lead wire group 4 is fixed to the guide portion 5a, as shown in FIG. 12, first, the lead wire group 4 extends from the base portion 2221 along the lower right support rib 24 shown in FIG. It is guided to the recess 2332 of the lower end 232, and is guided from the inside of the housing 23 a via the recess 2332. Then, the lead wires of the lead wire group 4 are passed one by one through the gap 541c shown in FIG. 14, and the lead wire group 4 is disposed between the first and second protrusions 521c and 522c and the guide groove 51a. .

  Also in the fourth embodiment, since the first tip position of the first projecting portion 521c is located on the second side portion 512 side with respect to the second tip position of the second projecting portion 522c, the first projecting portion 521c is substantially parallel to the central axis J1. The guided lead wire group 4 is prevented from coming off the guide portion 5a. Furthermore, by setting the width H6 of the gap 541 to be 80% or more and less than 100% of the lead wire diameter, the lead wire is reliably prevented from coming off the guide portion 5a, and the lead wire is passed through the gap 541c. In this case, the lead wire is prevented from being excessively pressed.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the first embodiment, the first protruding portion 521 that protrudes from the first side portion 511 of the guide groove 51 toward the second side portion 512 (that is, from one side to the other side). The second tip position and the second side portion of the second projecting portion 522 projecting from the second side portion 512 toward the first side portion 511 (that is, from the other side to the other side). The same distance from 512 may be used. Even in this case, the lead wire group 4 is prevented from coming off the guide portion 5 through the gap 541 (the same applies to the fourth embodiment).

  The pair of first protrusions and second protrusions described in the above embodiment may be provided at the position of the lower protrusion 53. When the lead wire group 4 is drawn from the exhaust side of the serial axial fan 1, a guide portion having a structure in which the guide portion 5 is turned upside down may be provided in the second housing 33.

  In the first to third embodiments, the guide portion 5 is provided over the entire length of the first housing 23, but the guide portion 5 is the upper end portion of the first housing 23 as in the fourth embodiment. 231 may be provided only at one corner. In this case, for example, in the guide portion 5, the guide groove 51 is provided only in the upper end portion 231, and almost the entire guide groove 51 is covered with the first and second protrusions. As described above, in the guide portion 5, the first protrusion portion and the second protrusion portion together with the lead wire group 4, at least part of the guide groove 51 extends from the first side portion 511 to the second side portion 512 (that is, the guide groove 51. The lead wire group 4 can be fixed onto the outer side surface 234 of the first housing 23 by covering substantially from one side to the other side of the two sides.

  In the above embodiment, the gap formed between the first protrusion and the second protrusion or between the protrusion and the side of the guide groove, in other words, by the first protrusion and the second protrusion. The gap that vertically cuts the area covered with the guide groove along the guide groove is not limited to the one shown in FIGS. 6, 10, 11 and the like, and is a combination of parts extending in various directions in the area. May be. Preferably, the minimum width of the gap (the shortest distance between the first protrusion and the second protrusion) is in the range of 80% or more and less than 100% of the maximum diameter of the lead wire group 4. In the second and third embodiments, the minimum width of the gaps 541a and 541b is made larger than the diameter of the lead wire, but the lead wire diameter (the lead wire group 4 when the lead wire diameters are different). 80% or more of the maximum diameter) and less than 100%.

  In the above embodiment, the second lead wire 42 is led out from the upper end portion 331 of the second housing 33, but may be led out from the lower end portion 332 of the second housing 33. Thus, the second lead wire 42 can be guided on the outer surface 234 of the first housing 23 together with the first lead wire 41.

  In the above embodiment, the number of lead wires may be other numbers as long as it is two or more. The guide part 5 may be provided in a series axial fan in which three or more axial fans are connected in series, and is preferably a shaft located at the end of the lead group 4 of the series axial fan on the lead-out side. Provided in the flow fan. In the above embodiment, the rotation direction of the first impeller 21 and the rotation direction of the second impeller 31 of the serial axial fan 1 may be the same.

It is a perspective view showing a series type axial flow fan concerning a 1st embodiment. It is sectional drawing of the serial type axial flow fan which concerns on 1st Embodiment. It is a bottom view of the 1st axial flow fan. It is a top view of a 2nd axial flow fan. It is a perspective view of a 1st axial flow fan. It is a figure which expands and shows a guide part. It is a perspective view of a serial type axial flow fan. It is a figure which shows the other example of a 1st protrusion part and a 2nd protrusion part. It is a figure which shows the further another example of a 1st protrusion part and a 2nd protrusion part. It is a figure which expands and shows the guide part of the serial type axial flow fan which concerns on 2nd Embodiment. It is a figure which expands and shows the guide part of the series type axial flow fan which concerns on 3rd Embodiment. It is a bottom view of the axial-flow fan which concerns on 4th Embodiment. It is a side view of the axial-flow fan which concerns on 4th Embodiment. It is a figure which expands and shows the guide part of an axial-flow fan.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inline axial fan 1a Axial fan 2 1st axial fan 3 2nd axial fan 4 Lead wire group 5, 5a Guide part 21 1st impeller 22 1st motor part 23 1st housing 31 2nd impeller 32 2nd 2 motor portion 33 second housing 41 first lead wire 42 second lead wire 51, 51a guide groove 55 lead wire outlet 211 first blade 231 upper end portion 231 (first housing) lower end portion 233 (first housing) , 233a (first housing) corner 234 (first housing) outer surface 234a (housing) outer surface 311 second blade 331 (second housing) upper end 333, 333a (second housing) corner 511 1st side part 512 2nd side part 521,521a-521c 1st protrusion part 522,522a-522c 2nd protrusion part 541 541a to 541c gap 5211 (first protrusion) tip 5221 (second protrusion) tip J1 central axis

Claims (10)

An axial fan,
An impeller having a plurality of wings;
A motor unit that generates an air flow by rotating the impeller around a central axis;
A housing that surrounds the outer periphery of the impeller and has a guide portion that guides a plurality of lead wires connected to the motor portion on the outer surface substantially parallel to the central axis;
With
The guide part is
A guide groove in which the plurality of lead wires are disposed;
A first projecting portion projecting from one side of the both sides of the guide groove toward the other, and a second projecting portion projecting from the other side of the both sides toward the one side;
With
By the first protrusion and the second protrusion, at least a part of the guide groove is substantially covered from the one side to the other side of the both sides together with the plurality of lead wires,
A gap is formed between the first projecting portion and the second projecting portion to vertically cut the region covered by the first projecting portion and the second projecting portion along the guide groove.
The first tip position, which is the tip position of the first protrusion, is closer to the other of the two side portions than the second tip position, which is the position of the tip of the second protrusion, or the first tip position and The second tip position is at the same distance from the other of the side portions;
Alternatively, the first tip position is closer to the one of the side portions than the second tip position, and the first tip position and the second tip position are different in a direction parallel to the central axis. The distance between the first tip position and the second tip position when the guide portion is viewed in a direction parallel to the central axis is less than the minimum diameter of the plurality of lead wires. An axial fan. The axial fan according to claim 1,
An axial fan, wherein a minimum width of the gap is 80% or more and less than 100% of a maximum diameter of the plurality of lead wires. The axial fan according to claim 1 or 2,
The outer shape of the housing is a substantially quadrangular prism,
The axial flow fan, wherein the guide portion is provided at a corner portion of the housing. An axial fan according to any one of claims 1 to 3,
Each of the first protrusion and the second protrusion protrudes toward the other protrusion,
The axial fan, wherein the gap between the first protrusion and the second protrusion is linear with respect to a direction parallel to the central axis. The axial fan according to claim 4,
The axial fan according to claim 1, wherein the first tip position is closer to the other of the both side portions than the second tip position. An axial fan according to any one of claims 1 to 3,
The axial fan according to claim 1, wherein the gap has a portion extending substantially perpendicular to a direction parallel to the central axis. The axial fan according to claim 6,
The first protrusion and the second protrusion are arranged in a direction parallel to the central axis, and the gap is a portion between the other of the both side portions and the tip of the first protrusion, An axial fan having a portion between the first protrusion and the second protrusion, and a portion between the one of the two side portions and the tip of the second protrusion. An axial fan according to any one of claims 1 to 7,
The guide groove, the first projecting portion, and the second projecting portion are provided at an end portion of the housing from which the plurality of lead wires are drawn out from the outer side surface of the housing to the outside of the housing. Axial fan to play. A series axial fan,
An axial fan according to any one of claims 1 to 7,
Another axial fan connected to the axial fan along the central axis;
With
A plurality of lead wires of the other axial fan are guided on the outer surface of the axial fan by the guide portion together with the lead wires of the axial fan. Current fan. A series axial fan,
An axial fan according to claim 8,
Another axial fan connected to the axial fan along the central axis;
With
In the vicinity of a boundary between an end portion of the housing of the axial flow fan facing the other axial flow fan and an end portion of the housing of the other axial flow fan facing the axial flow fan, the axial flow fan A lead wire outlet for guiding a plurality of lead wires and a plurality of lead wires of the other axial fan from the inside of the axial fan and the other axial fan onto the outer surface of the housing is provided;
The series axial fan, wherein the plurality of lead wires of the other axial fan are guided by the guide portion together with the plurality of lead wires of the axial fan.

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