JP2024002541A - Blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blower capable of increasing air volume which a blower flows to the outside, and suppressing an increase in manufacturing costs.

SOLUTION: A blower is equipped with a rotor 20 that can rotate about a center axis J, a stator 30 that is disposed oppositely to the rotor at an interval in a diametrical direction, an impeller portion 60 that is connected to the rotor and can rotate about the center axis, a circuit board 70 that is connected with the stator, and a case 40 that stores the rotor, the stator, the impeller portion, and the circuit board. A bottom surface 42a of the case has an air passage surface 42t configuring a part of a surface facing one side in the axial direction of an air sending passage 40a. The circuit board has an exposed surface 70f that is a surface facing the one side in the axial direction and is exposed into the air sending passage. The exposed surface configures a part of the surface turning to the one side in the axial direction of the air sending passage. In the axial direction, the exposed surface is disposed at the same position as the air passage surface.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

本発明は、送風機に関する。 The present invention relates to a blower.

家電機器、ＯＡ機器などの冷却、換気を行う送風機では、低コスト化の要望が高まっている。送風機は、周方向に配列された複数の羽根を備えるインペラと、インペラを回転させるモータと、を備える。例えば、特許文献１には、下ケーシング部材が回路基板によって構成される送風機が記載されている。 There is a growing demand for lower costs in blowers that cool and ventilate home appliances, office automation equipment, and the like. The blower includes an impeller including a plurality of blades arranged in a circumferential direction, and a motor that rotates the impeller. For example, Patent Document 1 describes a blower in which a lower casing member is formed of a circuit board.

特開２０２２－３８４８０号公報JP2022-38480A

上記のような送風機では、下ケーシング部材が板状の回路基板によって構成されるため、送風路の内部における空気の流れを滑らかにでき、送風機が外部に流す風量を高めることができるものの、下ケーシング部材が安価な樹脂によって構成される場合と比較して、送風機の製造コストが増大する。 In the above-mentioned blower, the lower casing member is composed of a plate-shaped circuit board, so the flow of air inside the air passage can be smoothed and the amount of air that the blower sends to the outside can be increased. The manufacturing cost of the blower increases compared to the case where the members are made of inexpensive resin.

本発明は、上記事情に鑑みて、送風機が外部に流す風量を高めることができるとともに、製造コストが増大することを抑制できる、送風機を提供することを目的の一つとする。 In view of the above circumstances, one of the objects of the present invention is to provide a blower that can increase the amount of air that the blower sends to the outside and can suppress an increase in manufacturing costs.

本発明の送風機の一つの態様は、中心軸を中心として回転可能なロータと、前記ロータと径方向に隙間を介して対向して配置されるステータと、前記ロータと接続され、前記中心軸を中心として回転可能なインペラ部と、前記ステータと接続される回路基板と、前記ロータ、前記ステータ、前記インペラ部、および前記回路基板を収容するケースと、を備える。前記回路基板の板面は、軸方向を向く。前記ケースは、前記ケースの内面の一部であって、前記インペラ部よりも径方向外側に位置する送風路と、軸方向一方側を向く底面を有し、前記回路基板が固定される底壁部と、を有する。前記底面は、前記送風路のうち軸方向一方側を向く面の一部を構成する風路面を有する。前記回路基板は、軸方向一方側を向く面であって、前記送風路内に露出する露出面を有する。前記露出面は、前記送風路のうち軸方向一方側を向く面の一部を構成する。軸方向において、前記露出面は、前記風路面と同じ位置に配置される。 One aspect of the blower of the present invention includes a rotor that is rotatable around a central axis, a stator that is arranged to face the rotor in a radial direction with a gap in between, and a stator that is connected to the rotor and that rotates the central axis. The present invention includes an impeller portion rotatable as a center, a circuit board connected to the stator, and a case housing the rotor, the stator, the impeller portion, and the circuit board. A board surface of the circuit board faces in the axial direction. The case is a part of the inner surface of the case, and has an air blowing passage located radially outward than the impeller portion, and a bottom surface facing one side in the axial direction, and a bottom wall to which the circuit board is fixed. It has a section and a. The bottom surface has an air passage surface that constitutes a part of the surface of the air passage that faces one side in the axial direction. The circuit board has an exposed surface that faces one side in the axial direction and is exposed in the air passage. The exposed surface constitutes a part of the surface of the air passage that faces one side in the axial direction. In the axial direction, the exposed surface is arranged at the same position as the air passage surface.

本発明の一つの態様によれば、送風機において、送風機が外部に流す風量を高めることができるとともに、製造コストが増大することを抑制できる。 According to one aspect of the present invention, in the blower, it is possible to increase the amount of air that the blower sends to the outside, and it is possible to suppress an increase in manufacturing costs.

図１は、一実施形態の送風機を示す斜視図である。FIG. 1 is a perspective view of a blower according to one embodiment. 図２は、一実施形態の送風機を示す他の斜視図である。FIG. 2 is another perspective view showing the blower of one embodiment. 図３は、一実施形態の送風機を示す断面図である。FIG. 3 is a sectional view showing a blower according to one embodiment. 図４は、一実施形態の送風機の一部を示す上面図である。FIG. 4 is a top view showing a portion of the blower of one embodiment. 図５は、一実施形態の第２ケース部材を示す上面図である。FIG. 5 is a top view showing the second case member of one embodiment. 図６は、一実施形態の送風機の一部を示す断面図であって、図４のVI－VI断面図である。FIG. 6 is a cross-sectional view showing a part of the blower of one embodiment, and is a cross-sectional view taken along line VI-VI in FIG. 図７は、一実施形態の送風機の一部を示す断面図であって、図４のVII－VII断面図である。FIG. 7 is a sectional view showing a part of the blower of one embodiment, and is a sectional view taken along line VII-VII in FIG. 4.

以下、図面を参照しながら、本発明の実施形態に係る送風機について説明する。なお、本発明の範囲は、以下の実施の形態に限定されず、本発明の技術的思想の範囲内で任意に変更可能である。また、以下の図面においては、各構成をわかりやすくするために、実際の構造と各構造における縮尺や数等を異ならせる場合がある。 Hereinafter, a blower according to an embodiment of the present invention will be described with reference to the drawings. Note that the scope of the present invention is not limited to the following embodiments, and can be arbitrarily modified within the scope of the technical idea of the present invention. Further, in the following drawings, in order to make each structure easier to understand, the scale, number, etc. of each structure may be different from the actual structure.

以下の説明において図には、適宜、Ｚ軸を示す。Ｚ軸は、以下に説明する実施形態の送風機１０の中心軸Ｊが延びる方向を示す。各図に示す中心軸Ｊは、仮想軸線である。以下の説明において、中心軸Ｊが延びる方向、つまりＺ軸と平行な方向を「軸方向」と呼ぶ。中心軸Ｊを中心とする径方向を単に「径方向」と呼ぶ。中心軸Ｊを中心とする周方向を単に「周方向」と呼ぶ。軸方向のうちＺ軸の矢印が向く側（＋Ｚ側）を「上側」または「軸方向一方側」と呼ぶ。軸方向のうちＺ軸の矢印が向く側と逆側（－Ｚ側）を「下側」または「軸方向他方側」と呼ぶ。なお、上側および下側は、単に各部の相対位置関係を説明するための名称であり、実際の配置関係等は、これらの名称で示される配置関係等以外の配置関係等であってもよい。 In the following description, the Z-axis is appropriately indicated in the figures. The Z-axis indicates the direction in which the central axis J of the blower 10 of the embodiment described below extends. The central axis J shown in each figure is a virtual axis. In the following description, the direction in which the central axis J extends, that is, the direction parallel to the Z-axis, will be referred to as the "axial direction." The radial direction centered on the central axis J is simply referred to as the "radial direction." The circumferential direction centered on the central axis J is simply referred to as the "circumferential direction." In the axial direction, the side toward which the Z-axis arrow points (+Z side) is referred to as the "upper side" or "one axial side." In the axial direction, the side opposite to the direction of the Z-axis arrow (-Z side) is called the "lower side" or the "other axial side." Note that the terms "upper side" and "lower side" are simply names used to explain the relative positional relationships of the respective parts, and the actual arrangement relationships may be other than those indicated by these names.

周方向は、各図において矢印θで示される。周方向のうち矢印θが向く側（＋θ側）を「周方向一方側」と呼ぶ。周方向のうち矢印θが向く側と逆側（－θ側）を「周方向他方側」と呼ぶ。周方向一方側は、上側から見て中心軸Ｊ回りに反時計回りに進む側である。周方向他方側は、上側から見て中心軸Ｊ回りに時計回りに進む側である。 The circumferential direction is indicated by an arrow θ in each figure. The side in the circumferential direction toward which the arrow θ faces (+θ side) is referred to as "one side in the circumferential direction." The side in the circumferential direction opposite to the side toward which the arrow θ points (-θ side) is referred to as "the other side in the circumferential direction." One side in the circumferential direction is a side that moves counterclockwise around the central axis J when viewed from above. The other side in the circumferential direction is the side that moves clockwise around the central axis J when viewed from above.

図１および図２に示す本実施形態の送風機１０は、モータ１５と、インペラ部６０と、を備える。本実施形態において、送風機１０は、インペラ部６０が中心軸Ｊを中心に回転することによって、空気を径方向外側に向かって送り出す遠心ファンである。 The blower 10 of this embodiment shown in FIGS. 1 and 2 includes a motor 15 and an impeller section 60. In this embodiment, the blower 10 is a centrifugal fan that sends air radially outward by having an impeller portion 60 rotate around a central axis J.

図３に示すように、インペラ部６０は、カップ部６０ａと、羽根６４と、環状部６５と、を有する。カップ部６０ａは、ロータ２０およびステータ３０を内部に収容する。カップ部６０ａは、インペラ天壁部６１と、インペラ円筒部６２と、曲面部６３と、を有する。インペラ天壁部６１は、モータ１５の上側に配置される。インペラ天壁部６１には、インペラ天壁部６１を軸方向に貫通するインペラ貫通孔６１ａが設けられる。軸方向に見て、インペラ貫通孔６１ａは、中心軸Ｊを中心とする略円形状である。インペラ円筒部６２は、中心軸Ｊを中心とする略円筒状である。インペラ円筒部６２の上側の端部は、インペラ天壁部６１の下側の端部と繋がる。曲面部６３は、径方向内側に向けて凸となる曲面状である。曲面部６３の上側の端部は、インペラ円筒部６２の下側の端部と繋がる。 As shown in FIG. 3, the impeller portion 60 includes a cup portion 60a, blades 64, and an annular portion 65. Cup portion 60a accommodates rotor 20 and stator 30 therein. The cup portion 60a includes an impeller top wall portion 61, an impeller cylindrical portion 62, and a curved surface portion 63. The impeller top wall portion 61 is arranged above the motor 15. The impeller top wall portion 61 is provided with an impeller through hole 61a that penetrates the impeller top wall portion 61 in the axial direction. When viewed in the axial direction, the impeller through hole 61a has a substantially circular shape centered on the central axis J. The impeller cylindrical portion 62 has a substantially cylindrical shape centered on the central axis J. The upper end of the impeller cylindrical part 62 is connected to the lower end of the impeller top wall part 61. The curved surface portion 63 has a curved shape that is convex toward the inside in the radial direction. The upper end of the curved surface portion 63 is connected to the lower end of the impeller cylindrical portion 62 .

図１に示すように、羽根６４は、周方向に沿って間隔をあけて複数設けられる。図３に示すように、各羽根６４それぞれの径方向内側の端部のうち下側の端部は、曲面部６３の径方向外側の端部と繋がる。図示は省略するが、各羽根６４は、それぞれ、軸方向に見て、径方向内側から径方向外側に向かうに従って、周方向一方側に位置する曲面状である。環状部６５は、中心軸Ｊを中心とする円環状である。環状部６５は、複数の羽根６４の上側の端部のうち径方向外側の部分と繋がる。なお、本実施形態において、インペラ部６０は、中心軸Ｊ回りに周方向他方側に向けて回転する。 As shown in FIG. 1, a plurality of blades 64 are provided at intervals along the circumferential direction. As shown in FIG. 3 , the lower end of the radially inner end of each blade 64 is connected to the radially outer end of the curved surface portion 63 . Although not shown, each blade 64 has a curved surface that is located on one side in the circumferential direction from the radially inner side to the radially outer side when viewed in the axial direction. The annular portion 65 has an annular shape centered on the central axis J. The annular portion 65 is connected to a radially outer portion of the upper end portions of the plurality of blades 64 . In addition, in this embodiment, the impeller part 60 rotates toward the other side in the circumferential direction around the central axis J.

モータ１５は、ケース４０と、スリーブ５０と、ロータ２０と、シャフト２３と、ステータ３０と、回路基板７０と、を備える。 The motor 15 includes a case 40, a sleeve 50, a rotor 20, a shaft 23, a stator 30, and a circuit board 70.

ケース４０は、スリーブ５０、ロータ２０、シャフト２３、ステータ３０、および回路基板７０を内部に収容する。本実施形態において、ケース４０は、樹脂製である。ケース４０は、第１ケース部材４１と、第２ケース部材４２と、を有する。 Case 40 accommodates sleeve 50, rotor 20, shaft 23, stator 30, and circuit board 70 therein. In this embodiment, the case 40 is made of resin. Case 40 includes a first case member 41 and a second case member 42.

第１ケース部材４１は、第１側壁部４１ａと、天壁部４１ｂと、第１開口部４１ｃと、第１固定部４１ｅと、を有する。第１側壁部４１ａは、軸方向に延びる略円筒状である。第１側壁部４１ａは、下側に開口する。第１側壁部４１ａは、インペラ部６０の上側の部分を径方向外側から囲む。天壁部４１ｂは、略円環板状である。天壁部４１ｂの板面は、軸方向を向いている。天壁部４１ｂの径方向外側の端部は、第１側壁部４１ａの上側の端部と繋がる。天壁部４１ｂには、吸気口４１ｄが設けられる。吸気口４１ｄは、天壁部４１ｂを軸方向に貫通する孔である。図１に示すように、第１開口部４１ｃは、周方向他方側に開口する。第１固定部４１ｅは、第１側壁部４１ａから径方向外側に突出する。第１ケース部材４１の内面のうち、インペラ部６０よりも径方向外側に位置する部分は、後述する送風路４０ａの上側の部分を構成する。 The first case member 41 has a first side wall portion 41a, a top wall portion 41b, a first opening portion 41c, and a first fixing portion 41e. The first side wall portion 41a has a substantially cylindrical shape extending in the axial direction. The first side wall portion 41a opens downward. The first side wall portion 41a surrounds the upper portion of the impeller portion 60 from the outside in the radial direction. The top wall portion 41b has a substantially annular plate shape. The plate surface of the top wall portion 41b faces in the axial direction. A radially outer end of the ceiling wall portion 41b is connected to an upper end of the first side wall portion 41a. The ceiling wall portion 41b is provided with an air intake port 41d. The intake port 41d is a hole that passes through the ceiling wall portion 41b in the axial direction. As shown in FIG. 1, the first opening 41c opens on the other side in the circumferential direction. The first fixing portion 41e projects radially outward from the first side wall portion 41a. A portion of the inner surface of the first case member 41 located radially outward from the impeller portion 60 constitutes an upper portion of the air passage 40a, which will be described later.

図３に示すように、第２ケース部材４２は、第２側壁部４２ａと、底壁部４２ｃと、第２開口部４２ｂと、第２固定部４２ｖと、を有する。第２側壁部４２ａは、軸方向に延びる略円筒状である。第２側壁部４２ａは、上側に開口する。第２側壁部４２ａは、インペラ部６０の下側の部分を径方向外側から囲む。第２側壁部４２ａの上側の端部は、第１側壁部４１ａの下側の端部と固定される。 As shown in FIG. 3, the second case member 42 includes a second side wall portion 42a, a bottom wall portion 42c, a second opening portion 42b, and a second fixing portion 42v. The second side wall portion 42a has a substantially cylindrical shape extending in the axial direction. The second side wall portion 42a opens upward. The second side wall portion 42a surrounds the lower portion of the impeller portion 60 from the outside in the radial direction. The upper end of the second side wall 42a is fixed to the lower end of the first side wall 41a.

底壁部４２ｃは、径方向に広がる略円環板状である。底壁部４２ｃの板面は、軸方向を向いている。底壁部４２ｃの径方向外側の端部は、第２側壁部４２ａの下側の端部と繋がる。底壁部４２ｃは、底面４２ｓと、基板収容部４２ｄと、底壁凹部４２ｅと、底壁中央孔４２ｈと、基板固定部４２ｎと、底壁孔部４２ｒと、を有する。第２ケース部材４２の内面のうち、インペラ部６０よりも径方向外側に位置する部分は、送風路４０ａの下側の部分を構成する。上述のように、第１ケース部材４１の内面のうち、インペラ部６０よりも径方向外側に位置する部分は、送風路４０ａの上側の部分を構成する。すなわち、ケース４０は、ケース４０の内面の一部であって、インペラ部６０よりも径方向外側に位置する送風路４０ａを有する。 The bottom wall portion 42c has a substantially annular plate shape that extends in the radial direction. The plate surface of the bottom wall portion 42c faces in the axial direction. A radially outer end of the bottom wall 42c is connected to a lower end of the second side wall 42a. The bottom wall portion 42c includes a bottom surface 42s, a substrate accommodating portion 42d, a bottom wall recess 42e, a bottom wall center hole 42h, a substrate fixing portion 42n, and a bottom wall hole 42r. A portion of the inner surface of the second case member 42 located radially outward from the impeller portion 60 constitutes a lower portion of the air passage 40a. As described above, the portion of the inner surface of the first case member 41 located radially outward from the impeller portion 60 constitutes the upper portion of the air passage 40a. That is, the case 40 has an air passage 40a that is a part of the inner surface of the case 40 and is located radially outward from the impeller portion 60.

底面４２ｓは、底壁部４２ｃの内面のうち、上側、すなわち軸方向一方側を向く面である。底面４２ｓは、インペラ部６０よりも下側に位置する。本実施形態において、底面４２ｓは、中心軸Ｊと直交する方向に広がる平面である。図４に示すように、底面４２ｓは、風路面４２ｔと、第１対向面４２ｕと、を有する。風路面４２ｔは、底面４２ｓの一部であって、インペラ部６０よりも径方向外側に位置する部分である。風路面４２ｔは、送風路４０ａのうち上側、すなわち軸方向一方側を向く面の一部を構成する。第１対向面４２ｕは、底面４２ｓの一部であって、インペラ部６０と軸方向に対向する部分である。軸方向に見て、第１対向面４２ｕは、中心軸Ｊを中心とする略円環状である。 The bottom surface 42s is a surface of the inner surface of the bottom wall portion 42c that faces upward, that is, on one side in the axial direction. The bottom surface 42s is located below the impeller portion 60. In this embodiment, the bottom surface 42s is a plane that extends in a direction perpendicular to the central axis J. As shown in FIG. 4, the bottom surface 42s has an air passage surface 42t and a first opposing surface 42u. The air passage surface 42t is a part of the bottom surface 42s and is located radially outward from the impeller portion 60. The air passage surface 42t constitutes a part of the surface of the air passage 40a that faces the upper side, that is, one side in the axial direction. The first opposing surface 42u is a part of the bottom surface 42s and is a part that faces the impeller part 60 in the axial direction. When viewed in the axial direction, the first opposing surface 42u has a substantially annular shape centered on the central axis J.

図３に示すように、基板収容部４２ｄは、底面４２ｓから下側、すなわち軸方向他方側に窪む穴である。基板収容部４２ｄは、基板支持面４２ｆを有する。基板支持面４２ｆは、基板収容部４２ｄの内面のうち、上側、すなわち軸方向一方側を向く面である。図５に示すように、基板収容部４２ｄは、第１収容部４２ｊと、第２収容部４２ｋと、を有する。軸方向に見て、第１収容部４２ｊは、基板収容部４２ｄのうち、中心軸Ｊの周囲を囲む部分である。第２収容部４２ｋは、第１収容部４２ｊから径方向外側に向けて延びている。第１収容部４２ｊの内部と第２収容部４２ｋの内部とは、互いに径方向に繋がる。図３に示すように、底壁凹部４２ｅは、基板支持面４２ｆから下側に窪む穴である。底壁中央孔４２ｈは、底壁部４２ｃを軸方向に貫通する孔である。軸方向に見て、底壁中央孔４２ｈは、中心軸Ｊを中心とする略円形状である。底壁中央孔４２ｈの内周面には、径方向外側に窪む２個の溝４２ｉが設けられる。各溝４２ｉは、それぞれ、周方向に延びる。各溝４２ｉは、互いに軸方向に並んで設けられる。 As shown in FIG. 3, the substrate accommodating portion 42d is a hole depressed downward from the bottom surface 42s, that is, toward the other side in the axial direction. The substrate accommodating portion 42d has a substrate support surface 42f. The substrate support surface 42f is a surface of the inner surface of the substrate accommodating portion 42d that faces upward, that is, on one side in the axial direction. As shown in FIG. 5, the substrate accommodating section 42d includes a first accommodating section 42j and a second accommodating section 42k. When viewed in the axial direction, the first accommodating portion 42j is a portion of the substrate accommodating portion 42d that surrounds the center axis J. The second accommodating portion 42k extends radially outward from the first accommodating portion 42j. The inside of the first accommodating part 42j and the inside of the second accommodating part 42k are connected to each other in the radial direction. As shown in FIG. 3, the bottom wall recess 42e is a hole depressed downward from the substrate support surface 42f. The bottom wall center hole 42h is a hole that passes through the bottom wall portion 42c in the axial direction. When viewed in the axial direction, the bottom wall central hole 42h has a substantially circular shape centered on the central axis J. Two grooves 42i recessed radially outward are provided on the inner peripheral surface of the bottom wall central hole 42h. Each groove 42i extends in the circumferential direction. The grooves 42i are arranged in parallel with each other in the axial direction.

基板固定部４２ｎは、軸方向に突出する柱状である。図５に示すように、本実施形態において、基板固定部４２ｎは、２個設けられる。一方の基板固定部４２ｎは、底壁凹部４２ｅの上側を向く面から上側、すなわち軸方向一方側に突出する。他方の基板固定部４２ｎは、基板支持面４２ｆから上側に突出する。図４に示すように、各基板固定部４２ｎは、第１貫通孔７０ｃを挟んで互いに径方向に対向する位置に配置される。軸方向に見て、各基板固定部４２ｎは、それぞれ、インペラ部６０と重なる。図３に示すように、底壁孔部４２ｒは、底壁部４２ｃを軸方向に貫通する孔である。図５に示すように、底壁孔部４２ｒは、第１収容部４２ｊの径方向外側の部分に設けられる。 The board fixing portion 42n has a columnar shape that projects in the axial direction. As shown in FIG. 5, in this embodiment, two substrate fixing parts 42n are provided. One substrate fixing portion 42n protrudes upward from the upper side of the bottom wall recess 42e, that is, toward one side in the axial direction. The other board fixing part 42n protrudes upward from the board support surface 42f. As shown in FIG. 4, each board fixing part 42n is arranged at a position facing each other in the radial direction with the first through hole 70c interposed therebetween. When viewed in the axial direction, each board fixing part 42n overlaps with the impeller part 60, respectively. As shown in FIG. 3, the bottom wall hole 42r is a hole that passes through the bottom wall 42c in the axial direction. As shown in FIG. 5, the bottom wall hole 42r is provided in a radially outer portion of the first accommodating portion 42j.

図１に示すように、第２開口部４２ｂは、周方向一方側に開口する。軸方向に見て、第２開口部４２ｂは、第１開口部４１ｃと重なる。第１開口部４１ｃと第２開口部４２ｂとは、排気口４０ｂを構成する。送風路４０ａを周方向一方側に向けて流れる空気は、排気口４０ｂを介して、送風機１０の外部に流れ出る。図２に示すように、第２固定部４２ｖは、第２側壁部４２ａから径方向外側に突出する。送風機１０は、図示しないネジ等によって家電機器等に固定される。 As shown in FIG. 1, the second opening 42b opens on one side in the circumferential direction. The second opening 42b overlaps the first opening 41c when viewed in the axial direction. The first opening 41c and the second opening 42b constitute an exhaust port 40b. Air flowing toward one side in the circumferential direction through the air passage 40a flows out of the air blower 10 via the exhaust port 40b. As shown in FIG. 2, the second fixing portion 42v protrudes radially outward from the second side wall portion 42a. The blower 10 is fixed to a home appliance or the like using screws (not shown) or the like.

図３に示すように、スリーブ５０は、軸方向に延びる略円筒状である。スリーブ５０の下側の端部は、底壁中央孔４２ｈの内部に配置され、ケース４０に固定される。スリーブ５０の内周面には、軸受９１，９２が保持され、軸受９１とインペラ部６０との間には、軸受９１を下側に押圧するコイルばね９４が設けられる。 As shown in FIG. 3, the sleeve 50 has a substantially cylindrical shape extending in the axial direction. The lower end of the sleeve 50 is placed inside the bottom wall center hole 42h and fixed to the case 40. Bearings 91 and 92 are held on the inner peripheral surface of the sleeve 50, and a coil spring 94 that presses the bearing 91 downward is provided between the bearing 91 and the impeller portion 60.

ロータ２０は、ロータケース２１と、磁石２２と、を備える。ロータ２０は、中心軸Ｊを中心として回転可能である。ロータケース２１は、中心軸Ｊを中心として軸方向に延びるケース円筒部２１ａと、ケース円筒部２１ａの上側の端部から径方向内側に延びるケース円環部２１ｂと、を有する。ロータケース２１は、インペラ部６０の内部に配置される。ケース円筒部２１ａの上側の部分は、インペラ円筒部６２の内周面に固定される。これにより、インペラ部６０は、ロータ２０と接続される。磁石２２は、ケース円筒部２１ａの内周面に固定される。磁石２２は、周方向に沿って複数の磁極が設けられる。 The rotor 20 includes a rotor case 21 and a magnet 22. The rotor 20 is rotatable around a central axis J. The rotor case 21 has a case cylindrical portion 21a that extends in the axial direction about the central axis J, and a case annular portion 21b that extends radially inward from the upper end of the case cylindrical portion 21a. Rotor case 21 is arranged inside impeller section 60 . The upper portion of the case cylindrical portion 21 a is fixed to the inner circumferential surface of the impeller cylindrical portion 62 . Thereby, the impeller section 60 is connected to the rotor 20. The magnet 22 is fixed to the inner peripheral surface of the case cylindrical portion 21a. The magnet 22 is provided with a plurality of magnetic poles along the circumferential direction.

シャフト２３は、中心軸Ｊに沿って軸方向に延びる略円柱状である。シャフト２３の上側の部分は、インペラ貫通孔６１ａに接続される。これにより、シャフト２３は、インペラ部６０と固定される。シャフト２３は、軸受９１，９２によって、中心軸Ｊを中心として回転自在に支持される。これにより、シャフト２３、インペラ部６０、およびロータ２０が、中心軸Ｊを中心として回転可能になる。 The shaft 23 has a substantially cylindrical shape that extends in the axial direction along the central axis J. The upper portion of the shaft 23 is connected to the impeller through hole 61a. Thereby, the shaft 23 is fixed to the impeller section 60. The shaft 23 is supported by bearings 91 and 92 so as to be rotatable about the central axis J. Thereby, the shaft 23, the impeller part 60, and the rotor 20 become rotatable around the central axis J.

ステータ３０は、ロータ２０の径方向内側に位置する。ステータ３０は、ロータ２０と径方向に隙間をあけて対向して配置される。ステータ３０は、ステータコア３１と、インシュレータ３２と、コイル３３と、を備える。ステータコア３１は、中心軸Ｊを中心とする略円環状である。ステータコア３１は、スリーブ５０の外周面に固定される。 The stator 30 is located inside the rotor 20 in the radial direction. The stator 30 is arranged to face the rotor 20 with a gap in the radial direction. Stator 30 includes a stator core 31, an insulator 32, and a coil 33. The stator core 31 has a substantially annular shape centered on the central axis J. Stator core 31 is fixed to the outer peripheral surface of sleeve 50.

回路基板７０は、コイル３３に供給される電流を制御する。回路基板７０は、コイル３３に電気的に接続される。つまり、回路基板７０は、ステータ３０と接続される。回路基板７０は、中心軸Ｊと直交する方向に沿って延びる板状である。回路基板７０の板面は、軸方向を向いている。回路基板７０は、インペラ部６０の下側に配置される。回路基板７０は、基板収容部４２ｄの内部に収容される。回路基板７０は、露出面７０ｆと、第２対向面７０ｇと、を有する。 Circuit board 70 controls the current supplied to coil 33. Circuit board 70 is electrically connected to coil 33. That is, the circuit board 70 is connected to the stator 30. The circuit board 70 has a plate shape extending along a direction perpendicular to the central axis J. The board surface of the circuit board 70 faces in the axial direction. The circuit board 70 is arranged below the impeller section 60. The circuit board 70 is housed inside the board housing section 42d. The circuit board 70 has an exposed surface 70f and a second opposing surface 70g.

図４に示すように、露出面７０ｆは、回路基板７０の上側、すなわち軸方向一方側を向く面のうち、インペラ部６０よりも径方向外側に位置する部分である。露出面７０ｆは、送風路４０ａ内に露出する。本実施形態において、送風路４０ａのうち上側を向く面は、風路面４２ｔおよび露出面７０ｆによって構成される。つまり、露出面７０ｆは、送風路４０ａのうち上側を向く面の一部を構成する。 As shown in FIG. 4, the exposed surface 70f is a portion of the upper side of the circuit board 70, that is, the surface facing one side in the axial direction, which is located on the outer side in the radial direction than the impeller portion 60. The exposed surface 70f is exposed within the air passage 40a. In this embodiment, the surface of the air passage 40a facing upward is constituted by an air passage surface 42t and an exposed surface 70f. In other words, the exposed surface 70f constitutes a part of the surface of the air passage 40a that faces upward.

図４に示す矢印ＡＦは、空気が流れる向きを示す。インペラ部６０が中心軸Ｊを中心として周方向一方側に向けて回転すると、複数の羽根６４によって、インペラ部６０から径方向外側に空気が送り出され、図３に示す吸気口４１ｄを介して、空気が送風機１０の内部に取り込まれる。同時に、図４に示すように、インペラ部６０の径方向外側から送り出された空気は、送風路４０ａの内部を周方向一方側に向けて流れる。送風路４０ａの内部を周方向一方側に向けて流れる空気は、排気口４０ｂを介して、送風機１０の外部に送り出される。本実施形態における送風路４０ａは、ケース４０の内面のうちインペラ部６０よりも径方向外側に位置する部分、および、露出面７０ｆによって構成される。 Arrow AF shown in FIG. 4 indicates the direction in which air flows. When the impeller part 60 rotates toward one side in the circumferential direction around the central axis J, air is sent out radially outward from the impeller part 60 by the plurality of blades 64, and through the air intake port 41d shown in FIG. Air is taken into the interior of the blower 10. At the same time, as shown in FIG. 4, the air sent out from the radially outer side of the impeller portion 60 flows inside the air passage 40a toward one side in the circumferential direction. The air flowing inside the air passage 40a toward one side in the circumferential direction is sent out to the outside of the blower 10 via the exhaust port 40b. The air passage 40a in this embodiment is configured by a portion of the inner surface of the case 40 that is located radially outward from the impeller portion 60, and an exposed surface 70f.

図６に示すように、軸方向において、露出面７０ｆは、風路面４２ｔと同じ位置に配置される。そのため、露出面７０ｆが風路面４２ｔに対して軸方向に突出することを抑制できる。これにより、送風路４０ａのうち上側を向く面に段差が生じることを抑制でき、送風路４０ａのうち上側を向く面の全体を滑らかな面にしやすい。よって、本実施形態では、送風路４０ａの内部における空気の流れが、風路面４２ｔと露出面７０ｆとの境界の上側を通過する際に乱れることを抑制できる。したがって、送風路４０ａの内部における空気の流れを滑らかにでき、送風機１０が外部に流す風量を高めることができる。
また、送風路４０ａの上側を向く面が、安価な樹脂で構成される第２ケース部材４２の風路面４２ｔおよび回路基板７０の露出面７０ｆによって構成されるため、送風路４０ａの上側を向く面が回路基板７０の上側を向く面のみで構成される場合と比較して、送風機１０の製造コストが増大することを抑制できる。
更に、回路基板７０の露出面７０ｆを、送風路４０ａの上側を向く面の一部として利用するため、回路基板７０よりも径方向外側に送風路４０ａを設ける構成と比較すると、径方向において、送風機１０の小型化を図ることができる。 As shown in FIG. 6, the exposed surface 70f is arranged at the same position as the air passage surface 42t in the axial direction. Therefore, it is possible to suppress the exposed surface 70f from protruding in the axial direction with respect to the air passage surface 42t. Thereby, it is possible to suppress the occurrence of a step on the upwardly facing surface of the airflow path 40a, and it is easy to make the entire upwardly facing surface of the airflow path 40a a smooth surface. Therefore, in this embodiment, the flow of air inside the air passage 40a can be prevented from being disturbed when passing above the boundary between the air passage surface 42t and the exposed surface 70f. Therefore, the flow of air inside the air passage 40a can be made smooth, and the amount of air that the blower 10 sends to the outside can be increased.
Further, since the upward facing surface of the air passage 40a is constituted by the air passage surface 42t of the second case member 42 made of inexpensive resin and the exposed surface 70f of the circuit board 70, the upward facing surface of the air passage 40a It is possible to suppress an increase in the manufacturing cost of the blower 10 compared to a case where the air blower 10 is formed of only the upwardly facing surface of the circuit board 70.
Furthermore, since the exposed surface 70f of the circuit board 70 is used as a part of the upwardly facing surface of the air passage 40a, compared to a configuration in which the air passage 40a is provided radially outward than the circuit board 70, in the radial direction, The blower 10 can be made smaller.

回路基板７０の下側、すなわち軸方向他方側を向く面の一部は、基板支持面４２ｆと接触する。よって、本実施形態によれば、軸方向において、露出面７０ｆの位置を、風路面４２ｔの位置と同じ位置に精度良く配置できる。そのため、送風路４０ａの上側を向く面をより好適に滑らかな面にしやすい。したがって、送風路４０ａの内部における空気の流れをより好適に滑らかにでき、送風機１０が外部に流す風量をより高めることができる。 A portion of the lower side of the circuit board 70, that is, the surface facing the other side in the axial direction, contacts the board support surface 42f. Therefore, according to this embodiment, in the axial direction, the exposed surface 70f can be accurately placed at the same position as the air passage surface 42t. Therefore, it is easier to make the surface facing upward of the air passage 40a more suitably smooth. Therefore, the flow of air inside the air passage 40a can be made smoother, and the amount of air that the blower 10 sends to the outside can be further increased.

なお、本明細書において「軸方向において、或る面は、他の面と同じ位置に配置される」とは、軸方向において或る面が厳密に他の面と同じ位置に配置される場合に限られず、軸方向において或る面が他の面と略同じ位置に配置される場合も含む。「軸方向において或る面が他の面と略同じ位置に配置される場合」とは、例えば、各面同士の軸方向の位置が各部材の寸法公差および組立公差等によって僅かに異なる場合を含む。 In addition, in this specification, "a certain surface is arranged at the same position as another surface in the axial direction" refers to a case where a certain surface is arranged at exactly the same position as another surface in the axial direction. However, the present invention is not limited to this, and includes a case where a certain surface is arranged at approximately the same position as another surface in the axial direction. "A case where a certain surface is arranged at approximately the same position as another surface in the axial direction" refers to, for example, a case where the axial position of each surface differs slightly due to dimensional tolerances and assembly tolerances of each member, etc. include.

具体的に、本実施形態において「軸方向において、露出面７０ｆは、風路面４２ｔと同じ位置に配置される」とは、軸方向において露出面７０ｆが厳密に風路面４２ｔと同じ位置に配置される場合に限られず、軸方向において露出面７０ｆが風路面４２ｔと略同じ位置に配置される場合も含む。つまり、各図においては、露出面７０ｆと風路面４２ｔが厳密に軸方向において同じ位置にある場合を示しているが、「軸方向において、露出面７０ｆは、風路面４２ｔと同じ位置に配置される」とは、露出面７０ｆの軸方向の位置と風路面４２ｔの軸方向の位置とが、略同じ範囲内において僅かに互いに異なっていてもよい。この場合、例えば、露出面７０ｆの軸方向の位置と風路面４２ｔの軸方向の位置の差が、軸方向と直交する方向において回路基板７０と基板収容部４２ｄとの間に生じる隙間以下である。略同じ範囲内において露出面７０ｆと風路面４２ｔとの軸方向の位置が異なっていても、風路面４２ｔと露出面７０ｆとの境界の上側を通過する空気の流れの乱れは十分に抑制できる。 Specifically, in this embodiment, "the exposed surface 70f is arranged at the same position as the air passage surface 42t in the axial direction" means that the exposed surface 70f is arranged at exactly the same position as the air passage surface 42t in the axial direction. The present invention is not limited to the case where the exposed surface 70f is arranged at substantially the same position as the air passage surface 42t in the axial direction. In other words, each figure shows a case where the exposed surface 70f and the air duct surface 42t are located at the same position in the axial direction, but "the exposed surface 70f is located at the same position as the air duct surface 42t in the axial direction." This may mean that the axial position of the exposed surface 70f and the axial position of the air passage surface 42t may be slightly different from each other within substantially the same range. In this case, for example, the difference between the axial position of the exposed surface 70f and the axial position of the air passage surface 42t is less than or equal to the gap that occurs between the circuit board 70 and the board accommodating portion 42d in the direction perpendicular to the axial direction. . Even if the axial positions of the exposed surface 70f and the air passage surface 42t are different within substantially the same range, disturbances in the flow of air passing above the boundary between the air passage surface 42t and the exposed surface 70f can be sufficiently suppressed.

なお、露出面７０ｆの軸方向の位置と風路面４２ｔの軸方向の位置とが互いに略同じ範囲内で僅かに異なる場合には、露出面７０ｆが風路面４２ｔの上側に位置する場合と比較して、露出面７０ｆが風路面４２ｔの下側に位置する場合の方が、風路面４２ｔと露出面７０ｆとの境界の上側を通過する空気の流れの乱れをより小さくできる。そのため、露出面７０ｆと風路面４２ｔとの軸方向の位置が互いに略同じで僅かに異なる場合には、露出面７０ｆが風路面４２ｔの下側に位置した方が好ましい。 Note that when the axial position of the exposed surface 70f and the axial position of the air passage surface 42t are slightly different within approximately the same range, compared to the case where the exposed surface 70f is located above the air passage surface 42t. Therefore, when the exposed surface 70f is located below the air path surface 42t, turbulence in the air flow passing above the boundary between the air path surface 42t and the exposed surface 70f can be made smaller. Therefore, when the axial positions of the exposed surface 70f and the air passage surface 42t are substantially the same and slightly different from each other, it is preferable that the exposed surface 70f is located below the air passage surface 42t.

図４に示すように、第２対向面７０ｇは、回路基板７０の上側、すなわち軸方向一方側を向く面のうち、インペラ部６０と軸方向に対向する部分である。図７に示すように、軸方向において、第２対向面７０ｇは、第１対向面４２ｕと同じ位置に配置される。よって、本実施形態によれば、軸方向において、ケース４０の第１対向面４２ｕおよび回路基板７０の第２対向面７０ｇと、インペラ部６０との間の隙間の寸法を小さくできるため、軸方向において、送風機１０の小型化を図ることができる。 As shown in FIG. 4, the second opposing surface 70g is a portion of the surface facing the upper side of the circuit board 70, that is, one side in the axial direction, that faces the impeller portion 60 in the axial direction. As shown in FIG. 7, the second opposing surface 70g is arranged at the same position as the first opposing surface 42u in the axial direction. Therefore, according to the present embodiment, the size of the gap between the impeller portion 60 and the first opposing surface 42u of the case 40 and the second opposing surface 70g of the circuit board 70 can be reduced in the axial direction. In this case, the blower 10 can be made smaller.

図４に示すように、回路基板７０は、第１基板部７０ａと、第２基板部７０ｂと、を有する。第１基板部７０ａは、回路基板７０のうち、中心軸Ｊを囲む部分である。第１基板部７０ａは、第１収容部４２ｊの内部に収容される。軸方向に見て、第１基板部７０ａは、インペラ部６０と重なる。第１基板部７０ａの外縁部は、基板収容部４２ｄの内側面と間隔Ｇ１をあけて配置される。つまり、回路基板７０の外縁部のうち軸方向に見てインペラ部６０と重なる部分は、基板収容部４２ｄの内側面と間隔Ｇ１をあけて配置される。第１基板部７０ａには、第１貫通孔７０ｃおよび貫通部７０ｄが設けられる。 As shown in FIG. 4, the circuit board 70 includes a first board part 70a and a second board part 70b. The first board portion 70a is a portion of the circuit board 70 that surrounds the central axis J. The first substrate section 70a is housed inside the first housing section 42j. The first substrate portion 70a overlaps the impeller portion 60 when viewed in the axial direction. The outer edge of the first substrate portion 70a is spaced apart from the inner surface of the substrate accommodating portion 42d by a gap G1. That is, the portion of the outer edge of the circuit board 70 that overlaps the impeller portion 60 when viewed in the axial direction is spaced apart from the inner surface of the board accommodating portion 42d with a gap G1. The first substrate portion 70a is provided with a first through hole 70c and a through portion 70d.

第１貫通孔７０ｃは、第１基板部７０ａを軸方向に貫通する孔である。軸方向に見て、第１貫通孔７０ｃは、中心軸Ｊを中心とする円形状である。図３に示すように、第１貫通孔７０ｃには、スリーブ５０およびシャフト２３が軸方向に通される。図４に示すように、貫通部７０ｄは、第１基板部７０ａの径方向外側の部分に設けられる。貫通部７０ｄは、第１基板部７０ａを軸方向に貫通する。貫通部７０ｄは、径方向に延びており、径方向外側に開口している。貫通部７０ｄには、基板固定部４２ｎが圧入される。 The first through hole 70c is a hole that passes through the first substrate portion 70a in the axial direction. When viewed in the axial direction, the first through hole 70c has a circular shape centered on the central axis J. As shown in FIG. 3, the sleeve 50 and the shaft 23 are passed through the first through hole 70c in the axial direction. As shown in FIG. 4, the penetrating portion 70d is provided in a radially outer portion of the first substrate portion 70a. The penetrating portion 70d passes through the first substrate portion 70a in the axial direction. The penetrating portion 70d extends in the radial direction and opens outward in the radial direction. The board fixing portion 42n is press-fitted into the penetrating portion 70d.

第２基板部７０ｂは、回路基板７０のうち、第１基板部７０ａから径方向外側に突出する部分である。第２基板部７０ｂは、第２収容部４２ｋの内部に収容される。軸方向に見て、第２基板部７０ｂの径方向外側の部分は、インペラ部６０の径方向外側に配置される。第２基板部７０ｂは、複数の接続部７２と、第２貫通孔７０ｅと、を有する。複数の接続部７２は、それぞれ、第２基板部７０ｂを軸方向に貫通する孔と、孔の周囲を囲むランド部と、を有する。第２貫通孔７０ｅは、第２基板部７０ｂを軸方向に貫通する孔である。第２貫通孔７０ｅには、基板固定部４２ｎが圧入される。また、上述のように貫通部７０ｄには、基板固定部４２ｎが圧入される。これらにより、回路基板７０は、底壁部４２ｃに固定される。また、本実施形態の送風機１０の製造工程では、回路基板７０を保持し、回路基板７０を少なくとも軸方向に移動可能な図示しない自動組立機によって、第２ケース部材４２の上側から回路基板７０を下側に移動させ、貫通部７０ｄおよび第２貫通孔７０ｅそれぞれに、基板固定部４２ｎを圧入して、回路基板７０を底壁部４２ｃに固定する。よって、本実施形態によれば、回路基板７０が底壁部４２ｃと圧入によって固定されるため、例えば、ネジなどの部材によって、回路基板７０を底壁部４２ｃに固定する場合と比較して、回路基板７０を底壁部４２ｃに固定する工数を低減できるとともに、送風機１０の部品点数を低減できる。したがって、送風機１０の製造工数および製造コストを低減できる。また、本実施形態によれば、ネジによって回路基板７０を底壁部４２ｃに固定する場合と比較すると、自動組立機にネジを締め付けるための機構を設ける必要が無く、自動組立機の構成を簡略化できる。したがって、自動組立機のコストを低減でき、送風機１０の製造コストを低減できる。 The second board portion 70b is a portion of the circuit board 70 that protrudes radially outward from the first board portion 70a. The second substrate section 70b is housed inside the second housing section 42k. When viewed in the axial direction, the radially outer portion of the second substrate portion 70b is arranged radially outwardly of the impeller portion 60. The second substrate portion 70b has a plurality of connection portions 72 and a second through hole 70e. Each of the plurality of connecting parts 72 has a hole passing through the second substrate part 70b in the axial direction and a land part surrounding the hole. The second through hole 70e is a hole that passes through the second substrate portion 70b in the axial direction. The substrate fixing portion 42n is press-fitted into the second through hole 70e. Further, as described above, the board fixing part 42n is press-fitted into the through part 70d. With these, the circuit board 70 is fixed to the bottom wall portion 42c. Further, in the manufacturing process of the blower 10 of this embodiment, the circuit board 70 is mounted from above the second case member 42 by an automatic assembly machine (not shown) that can hold the circuit board 70 and move the circuit board 70 at least in the axial direction. The circuit board 70 is moved downward, and the board fixing parts 42n are press-fitted into the through-holes 70d and the second through-holes 70e, respectively, to fix the circuit board 70 to the bottom wall part 42c. Therefore, according to the present embodiment, since the circuit board 70 is fixed to the bottom wall part 42c by press fitting, compared to the case where the circuit board 70 is fixed to the bottom wall part 42c with a member such as a screw, for example, The number of man-hours for fixing the circuit board 70 to the bottom wall portion 42c can be reduced, and the number of parts of the blower 10 can be reduced. Therefore, the number of manufacturing steps and manufacturing cost of the blower 10 can be reduced. Furthermore, according to the present embodiment, compared to the case where the circuit board 70 is fixed to the bottom wall portion 42c with screws, there is no need to provide the automatic assembly machine with a mechanism for tightening the screws, and the configuration of the automatic assembly machine is simplified. can be converted into Therefore, the cost of the automatic assembly machine can be reduced, and the manufacturing cost of the blower 10 can be reduced.

また、上述のように、基板固定部４２ｎは、インペラ部６０と重なる。よって、本実施形態によれば、例えば、ネジによって、回路基板７０を底壁部４２ｃに固定する場合と比較して、基板固定部４２ｎにはネジ頭に相当する部分が無いため、軸方向において、回路基板７０とインペラ部６０との間の隙間の寸法を小さくできる。したがって、軸方向において、送風機１０の小型化を図ることができる。 Further, as described above, the board fixing part 42n overlaps with the impeller part 60. Therefore, according to the present embodiment, compared to the case where the circuit board 70 is fixed to the bottom wall part 42c with screws, for example, since the board fixing part 42n does not have a part corresponding to a screw head, , the size of the gap between the circuit board 70 and the impeller section 60 can be reduced. Therefore, the size of the blower 10 can be reduced in the axial direction.

本実施形態において、第２基板部７０ｂの外縁部のうちインペラ部６０よりも径方向外側の部分は、第２収容部４２ｋの内側面に隙間嵌めされる。つまり、回路基板７０の外縁部のうちインペラ部６０よりも径方向外側の部分は、基板収容部４２ｄの内側面に隙間嵌めされる。よって、本実施形態によれば、送風路４０ａにおいて、回路基板７０の外縁部と、基板収容部４２ｄの内側面との間の隙間の寸法を小さくでき、送風路４０ａの内部を流れる空気が、回路基板７０と基板収容部４２ｄとの間に入りこむことを抑制できる。そのため、風路面４２ｔと露出面７０ｆとの境界の上側を通過する際に、空気の流れが乱れることを抑制できる。よって、送風路４０ａの内部における空気の流れを滑らかにでき、送風機１０が外部に流す風量を高めることができる。 In this embodiment, a portion of the outer edge portion of the second substrate portion 70b that is radially outer than the impeller portion 60 is fit into the inner surface of the second accommodating portion 42k. That is, a portion of the outer edge of the circuit board 70 that is radially outer than the impeller portion 60 is fit into the inner surface of the board accommodating portion 42d. Therefore, according to the present embodiment, in the air passage 40a, the size of the gap between the outer edge of the circuit board 70 and the inner surface of the board accommodating portion 42d can be reduced, and the air flowing inside the air passage 40a can be reduced. It is possible to prevent the circuit board from getting between the circuit board 70 and the board accommodating portion 42d. Therefore, it is possible to suppress disturbance of the air flow when passing above the boundary between the air path surface 42t and the exposed surface 70f. Therefore, the flow of air inside the air passage 40a can be made smooth, and the amount of air that the blower 10 sends to the outside can be increased.

また、本実施形態によれば、上述のように、回路基板７０の外縁部のうち軸方向に見てインペラ部６０と重なる部分は、基板収容部４２ｄの内側面と間隔Ｇ１をあけて配置される。また、間隔Ｇ１は、回路基板７０の外縁部のうちインペラ部６０よりも径方向外側の部分と基板収容部４２ｄの内側面との間隔Ｇ２よりも大きい。よって、基板収容部４２ｄおよび回路基板７０に周方向および径方向の寸法ばらつきがあっても、間隔Ｇ１によって、係る寸法ばらつきを吸収できるため、回路基板７０を基板収容部４２ｄの内部に容易に挿入でき、回路基板７０を底壁部４２ｃに容易に固定できる。したがって、回路基板７０を底壁部４２ｃに固定する工程の工数が増大することを抑制でき、送風機１０の製造工数が増大することを抑制できる。 Further, according to the present embodiment, as described above, the portion of the outer edge of the circuit board 70 that overlaps with the impeller portion 60 when viewed in the axial direction is arranged with a gap G1 from the inner surface of the board accommodating portion 42d. Ru. Moreover, the distance G1 is larger than the distance G2 between the portion of the outer edge of the circuit board 70 that is radially outer than the impeller portion 60 and the inner surface of the board accommodating portion 42d. Therefore, even if there are dimensional variations in the board accommodating part 42d and the circuit board 70 in the circumferential direction and the radial direction, such dimensional variations can be absorbed by the gap G1, so that the circuit board 70 can be easily inserted into the board accommodating part 42d. Therefore, the circuit board 70 can be easily fixed to the bottom wall portion 42c. Therefore, it is possible to suppress an increase in the number of man-hours for the process of fixing the circuit board 70 to the bottom wall portion 42c, and it is possible to suppress an increase in the number of man-hours for manufacturing the blower 10.

図３に示すように、回路基板７０には、第１電子部品８０および第２電子部品８１が固定される。図２に示すように、第１電子部品８０は、底壁部４２ｃから下側に突出する。本実施形態において、第１電子部品８０は、コネクタである。なお第１電子部品８０は、コネクタ以外の電子部品であってもよい。第２電子部品８１は、回路基板７０の下側を向く面に固定される。第２電子部品８１は、底壁凹部４２ｅの内部に収容される。本実施形態において、第２電子部品８１は、複数の電子部品を含む。第２電子部品８１は、コンデンサおよびトランジスタなどの電子部品である。 As shown in FIG. 3, a first electronic component 80 and a second electronic component 81 are fixed to the circuit board 70. As shown in FIG. 2, the first electronic component 80 protrudes downward from the bottom wall portion 42c. In this embodiment, the first electronic component 80 is a connector. Note that the first electronic component 80 may be an electronic component other than a connector. The second electronic component 81 is fixed to the surface of the circuit board 70 facing downward. The second electronic component 81 is housed inside the bottom wall recess 42e. In this embodiment, the second electronic component 81 includes a plurality of electronic components. The second electronic component 81 is an electronic component such as a capacitor and a transistor.

以上に、本発明の一実施形態を説明したが、実施形態における各構成およびそれらの組み合わせ等は一例であり、本発明の趣旨から逸脱しない範囲内で、構成の付加、省略、置換およびその他の変更が可能である。また、本発明は実施形態によって限定されることはない。例えば、上述した実施形態に示した送風機の用途は、特に限定されない。 Although one embodiment of the present invention has been described above, each structure and combination thereof in the embodiment is merely an example, and any addition, omission, substitution, or other modification of the structure may be made without departing from the spirit of the present invention. Changes are possible. Moreover, the present invention is not limited by the embodiments. For example, the use of the blower shown in the embodiment described above is not particularly limited.

軸方向において、底壁部の風路面と、回路基板の露出面とが同じ位置に配置されるならば、回路基板の軸方向他方側を向く面を基板支持面に接触させる必要は無く、回路基板の軸方向他方側を向く面は、基板支持面と軸方向に隙間をあけて配置されてもよい。 If the air passage surface of the bottom wall and the exposed surface of the circuit board are arranged at the same position in the axial direction, there is no need for the surface of the circuit board facing the other side in the axial direction to contact the board support surface, and the circuit The surface of the substrate facing the other side in the axial direction may be arranged with a gap in the axial direction from the substrate supporting surface.

また、送風路４０ａの内部における空気の流れを滑らかにできるならば、回路基板の外縁部のうちインペラ部よりも径方向外側の部分は、基板収容部の内側面に隙間嵌めされる必要はなく、隙間をあけて配置されていてもよい。これにより、回路基板を底壁部に固定する工程において、回路基板を基板収容部の内部により容易に挿入でき、送風機の製造工数を抑制できる。また、回路基板の外縁部のうち軸方向に見てインペラ部と重なる部分は、基板収容部の内側面と隙間嵌めされていてもよい。これにより、周方向および径方向において、底壁部に対する回路基板の位置をより精度良く決めることができる。 Furthermore, if the air flow inside the air passage 40a can be made smooth, the part of the outer edge of the circuit board that is radially outer than the impeller part does not need to be fitted into the inner surface of the board accommodating part. , may be arranged with a gap between them. Thereby, in the process of fixing the circuit board to the bottom wall part, the circuit board can be more easily inserted into the board accommodating part, and the number of steps for manufacturing the blower can be suppressed. Furthermore, a portion of the outer edge of the circuit board that overlaps the impeller portion when viewed in the axial direction may be fitted with a clearance on the inner surface of the board accommodating portion. Thereby, the position of the circuit board relative to the bottom wall portion can be determined with higher accuracy in the circumferential direction and the radial direction.

なお、本技術は以下のような構成をとることが可能である。
（１）中心軸を中心として回転可能なロータと、前記ロータと径方向に隙間を介して対向して配置されるステータと、前記ロータと接続され、前記中心軸を中心として回転可能なインペラ部と、前記ステータと接続される回路基板と、前記ロータ、前記ステータ、前記インペラ部、および前記回路基板を収容するケースと、を備え、前記回路基板の板面は、軸方向を向き、前記ケースは、前記ケースの内面の一部であって、前記インペラ部よりも径方向外側に位置する送風路と、軸方向一方側を向く底面を有し、前記回路基板が固定される底壁部と、を有し、前記底面は、前記送風路のうち軸方向一方側を向く面の一部を構成する風路面を有し、前記回路基板は、軸方向一方側を向く面であって、前記送風路内に露出する露出面を有し、前記露出面は、前記送風路のうち軸方向一方側を向く面の一部を構成し、軸方向において、前記露出面は、前記風路面と同じ位置に配置される、送風機。
（２） 前記底面は、前記インペラ部と軸方向に対向する第１対向面を有し、前記回路基板は、軸方向一方側を向く面であって、前記インペラ部と軸方向に対向する第２対向面を有し、軸方向において、前記第２対向面は、前記第１対向面と同じ位置に配置される、（１）に記載の送風機。
（３） 前記底壁部は、軸方向他方側に窪む基板収容部を有し、前記回路基板は、前記基板収容部の内部に収容される、（１）または（２）に記載の送風機。
（４） 前記基板収容部は、軸方向一方側を向く基板支持面を有し、前記基板支持面の少なくとも一部は、前記回路基板の軸方向他方側を向く面と接触する、（３）に記載の送風機。
（５） 前記回路基板の外縁部のうち前記インペラ部よりも径方向外側の部分は、前記基板収容部の内側面に隙間嵌めされる、（３）または（４）に記載の回路基板。
（６） 前記回路基板の外縁部のうち軸方向に見て前記インペラ部と重なる部分は、前記基板収容部の内側面と間隔をあけて配置され、前記間隔は、前記回路基板の外縁部のうち前記インペラ部よりも径方向外側の部分と前記基板収容部の内側面との隙間よりも大きい、（３）から（５）のいずれか一項に記載の送風機。
（７） 前記底壁部は、軸方向一方側に突出する基板固定部を有し、前記回路基板は、前記回路基板を軸方向に貫通する貫通孔を有し、前記基板固定部は、前記貫通孔に圧入されている、（１）から（６）のいずれか一項に記載の送風機。
（８） 軸方向に見て、前記基板固定部は、前記インペラ部と重なる、（７）に記載の送風機。 Note that the present technology can have the following configuration.
(1) A rotor rotatable about a central axis, a stator disposed radially opposite the rotor with a gap in between, and an impeller connected to the rotor and rotatable about the central axis. a circuit board connected to the stator; and a case accommodating the rotor, the stator, the impeller section, and the circuit board, the board surface of the circuit board facing the axial direction, and the case housing the circuit board. is a part of the inner surface of the case, and has an air blowing passage located radially outward than the impeller portion, and a bottom wall portion facing one side in the axial direction, to which the circuit board is fixed; , the bottom surface has an air passage surface that constitutes a part of the surface of the air passage that faces one side in the axial direction, and the circuit board has a surface that faces one side in the axial direction, It has an exposed surface exposed in the air passage, the exposed surface constitutes a part of the surface facing one side in the axial direction of the air passage, and in the axial direction, the exposed surface is the same as the air passage surface. The blower is placed in position.
(2) The bottom surface has a first opposing surface that faces the impeller section in the axial direction, and the circuit board has a first opposing surface that faces one side in the axial direction, and the circuit board has a first opposing surface that faces the impeller section in the axial direction. The blower according to (1), which has two opposing surfaces, and in the axial direction, the second opposing surface is arranged at the same position as the first opposing surface.
(3) The blower according to (1) or (2), wherein the bottom wall part has a board accommodating part recessed on the other side in the axial direction, and the circuit board is housed inside the board accommodating part. .
(4) The board accommodating portion has a board support surface facing one side in the axial direction, and at least a portion of the board support surface contacts the surface of the circuit board facing the other side in the axial direction. The blower described in .
(5) The circuit board according to (3) or (4), wherein a portion of the outer edge portion of the circuit board that is radially outer than the impeller portion is fit into the inner surface of the board housing portion.
(6) A portion of the outer edge of the circuit board that overlaps with the impeller when viewed in the axial direction is spaced apart from the inner surface of the board accommodating portion, and the space is equal to or smaller than the outer edge of the circuit board. The blower according to any one of (3) to (5), wherein the gap is larger than a gap between a portion radially outer than the impeller portion and an inner surface of the substrate accommodating portion.
(7) The bottom wall portion has a board fixing part that protrudes to one side in the axial direction, the circuit board has a through hole passing through the circuit board in the axial direction, and the board fixing part has a board fixing part that protrudes to one side in the axial direction; The blower according to any one of (1) to (6), which is press-fitted into the through hole.
(8) The blower according to (7), wherein the board fixing part overlaps the impeller part when viewed in the axial direction.

１０…送風機、２０…ロータ、３０…ステータ、４０…ケース、４０ａ…送風路、４２ｃ…底壁部、４２ｄ…基板収容部、４２ｆ…基板支持面、４２ｎ…基板固定部、４２ｓ…底面、４２ｔ…風路面、４２ｕ…第１対向面、６０…インペラ部、７０…回路基板、７０ｄ…貫通孔（貫通部）、７０ｅ…貫通孔（第２貫通孔）、７０ｆ…露出面、７０ｇ…第２対向面、Ｇ１…間隔、Ｇ２…間隔、Ｊ…中心軸 DESCRIPTION OF SYMBOLS 10...Blower, 20...Rotor, 30...Stator, 40...Case, 40a...Blower path, 42c...Bottom wall part, 42d...Board storage part, 42f...Board support surface, 42n...Board fixing part, 42s...Bottom surface, 42t ...Air passage surface, 42u...First opposing surface, 60...Impeller part, 70...Circuit board, 70d...Through hole (penetration part), 70e...Through hole (second through hole), 70f...Exposed surface, 70g...Second Opposing surface, G1...distance, G2...distance, J...center axis

Claims (8)

中心軸を中心として回転可能なロータと、
前記ロータと接続され、前記中心軸を中心として回転可能なインペラ部と、
前記ロータと径方向に隙間を介して対向して配置されるステータと、
前記ステータと接続される回路基板と、
前記ロータ、前記ステータ、前記インペラ部、および前記回路基板を収容するケースと、
を備え、
前記回路基板の板面は、軸方向を向き、
前記ケースは、
前記ケースの内面の一部であって、前記インペラ部よりも径方向外側に位置する送風路と、
軸方向一方側を向く底面を有し、前記回路基板が固定される底壁部と、
を有し、
前記底面は、前記送風路のうち軸方向一方側を向く面の一部を構成する風路面を有し、
前記回路基板は、軸方向一方側を向く面であって、前記送風路内に露出する露出面を有し、
前記露出面は、前記送風路のうち軸方向一方側を向く面の一部を構成し、
軸方向において、前記露出面は、前記風路面と同じ位置に配置される、送風機。 a rotor that can rotate around a central axis;
an impeller unit connected to the rotor and rotatable about the central axis;
a stator arranged to face the rotor in a radial direction with a gap therebetween;
a circuit board connected to the stator;
a case that accommodates the rotor, the stator, the impeller section, and the circuit board;
Equipped with
The board surface of the circuit board is oriented in the axial direction,
The case is
an air passage that is a part of the inner surface of the case and is located radially outer than the impeller portion;
a bottom wall portion having a bottom surface facing one side in the axial direction and to which the circuit board is fixed;
has
The bottom surface has an air passage surface that constitutes a part of a surface facing one side in the axial direction of the air passage,
The circuit board has an exposed surface that faces one side in the axial direction and is exposed in the air passage,
The exposed surface constitutes a part of the surface facing one side in the axial direction of the air passage,
In the blower, the exposed surface is arranged at the same position as the air path surface in the axial direction. 前記底面は、前記インペラ部と軸方向に対向する第１対向面を有し、
前記回路基板は、軸方向一方側を向く面であって、前記インペラ部と軸方向に対向する第２対向面を有し、
軸方向において、前記第２対向面は、前記第１対向面と同じ位置に配置される、請求項１に記載の送風機。 The bottom surface has a first opposing surface that faces the impeller portion in the axial direction,
The circuit board has a second opposing surface that faces one side in the axial direction and that faces the impeller portion in the axial direction,
The blower according to claim 1, wherein the second opposing surface is located at the same position as the first opposing surface in the axial direction. 前記底壁部は、軸方向他方側に窪む基板収容部を有し、
前記回路基板は、前記基板収容部の内部に収容される、請求項１または２に記載の送風機。 The bottom wall portion has a substrate accommodating portion recessed on the other side in the axial direction,
The blower according to claim 1 or 2, wherein the circuit board is housed inside the board housing section. 前記基板収容部は、軸方向一方側を向く基板支持面を有し、
前記基板支持面の少なくとも一部は、前記回路基板の軸方向他方側を向く面と接触する、請求項３に記載の送風機。 The substrate accommodating portion has a substrate support surface facing one side in the axial direction,
The blower according to claim 3, wherein at least a portion of the substrate support surface contacts a surface facing the other axial side of the circuit board. 前記回路基板の外縁部のうち前記インペラ部よりも径方向外側の部分は、前記基板収容部の内側面に隙間嵌めされる、請求項３に記載の送風機。 The blower according to claim 3, wherein a portion of the outer edge of the circuit board that is radially outer than the impeller portion is fit into an inner surface of the board accommodating portion. 前記回路基板の外縁部のうち軸方向に見て前記インペラ部と重なる部分は、前記基板収容部の内側面と間隔をあけて配置され、
前記間隔は、前記回路基板の外縁部のうち前記インペラ部よりも径方向外側の部分と前記基板収容部の内側面との隙間よりも大きい、請求項５に記載の送風機。 A portion of the outer edge of the circuit board that overlaps the impeller portion when viewed in the axial direction is spaced apart from the inner surface of the board accommodating portion,
The blower according to claim 5, wherein the gap is larger than a gap between a portion of the outer edge of the circuit board that is radially outer than the impeller portion and an inner surface of the board storage portion. 前記底壁部は、軸方向一方側に突出する基板固定部を有し、
前記回路基板は、前記回路基板を軸方向に貫通する貫通孔を有し、
前記基板固定部は、前記貫通孔に圧入されている、請求項１または２に記載の送風機。 The bottom wall portion has a substrate fixing portion protruding to one side in the axial direction,
The circuit board has a through hole that passes through the circuit board in an axial direction,
The blower according to claim 1 or 2, wherein the substrate fixing part is press-fitted into the through hole. 軸方向に見て、前記基板固定部は、前記インペラ部と重なる、請求項７に記載の送風機。 The blower according to claim 7, wherein the substrate fixing part overlaps the impeller part when viewed in the axial direction.

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