WO2023233609A1 - Electric motor and air conditioner - Google Patents

Electric motor and air conditioner Download PDF

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Publication number
WO2023233609A1
WO2023233609A1 PCT/JP2022/022430 JP2022022430W WO2023233609A1 WO 2023233609 A1 WO2023233609 A1 WO 2023233609A1 JP 2022022430 W JP2022022430 W JP 2022022430W WO 2023233609 A1 WO2023233609 A1 WO 2023233609A1
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WO
WIPO (PCT)
Prior art keywords
lead wire
electric motor
component
cover component
circuit board
Prior art date
Application number
PCT/JP2022/022430
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French (fr)
Japanese (ja)
Inventor
諒伍 ▲高▼橋
隆徳 渡邉
洋樹 麻生
Original Assignee
三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2022/022430 priority Critical patent/WO2023233609A1/en
Publication of WO2023233609A1 publication Critical patent/WO2023233609A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers

Definitions

  • the present disclosure relates to an electric motor and an air conditioner.
  • An objective of the present disclosure is to prevent substrate failure by preventing water vapor from entering the substrate.
  • the electric motor of the present disclosure includes: stator and a circuit board; a molded resin covering the stator and the circuit board; a lead wire connected to the circuit board; and a cover part that covers a part of the lead wire, A part of the cover component is fixed by the mold resin, and another part of the cover component is exposed outside the mold resin, a first end of the lead wire is fixed to the circuit board; a second end of the lead wire extends outside the cover component; the portion of the lead wire between the first end and the second end is provided within the cover component;
  • the angle formed by the direction in which the lead wire extends from the mold resin to the inside of the cover component and the direction in which the lead wire extends from the inside of the cover component to the outside of the cover component is defined as ⁇ 1.
  • the air conditioner of the present disclosure includes: indoor unit and an outdoor unit connected to the indoor unit;
  • the indoor unit, the outdoor unit, or each of the indoor unit and the outdoor unit includes the electric motor.
  • FIG. 1 is a cross-sectional view schematically showing an electric motor according to Embodiment 1.
  • FIG. FIG. 3 is a side view schematically showing a stator.
  • FIG. 2 is a front view schematically showing a stator.
  • FIG. 2 is a front view schematically showing a circuit board (also simply referred to as a "board") fixed to a stator.
  • FIG. 2 is a cross-sectional view of a lead wire provided within the cover component shown in FIG. 1;
  • FIG. 3 is a cross-sectional view schematically showing the internal structure of the cover component. It is a figure which shows roughly an example of a cover component.
  • FIG. 3 is a cross-sectional view schematically showing an electric motor according to modification example 1.
  • Figure 9 schematically shows a tube held in the cover part shown in Figure 8;
  • FIG. 2 is a diagram schematically showing the configuration of an air conditioner according to a second embodiment.
  • Embodiment 1 The electric motor 1 according to the first embodiment will be described below.
  • the z-axis direction (z-axis) indicates a direction parallel to the axis A1 of the electric motor 1
  • the x-axis direction (x-axis) indicates a direction orthogonal to the z-axis direction.
  • the y-axis direction (y-axis) indicates a direction perpendicular to both the z-axis direction and the x-axis direction.
  • the axis A1 is the rotation center of the rotor 2, that is, the rotation axis of the rotor 2.
  • the direction parallel to the axis A1 is also referred to as the "axial direction of the rotor 2" or simply the “axial direction.”
  • the radial direction is the radial direction of the rotor 2, stator 3, or stator core 31, and is a direction perpendicular to the axis A1.
  • the xy plane is a plane perpendicular to the axial direction.
  • Arrow D1 indicates a circumferential direction centered on axis A1.
  • the circumferential direction of the rotor 2, stator 3, or stator core 31 is also simply referred to as the "circumferential direction.”
  • FIG. 1 is a sectional view schematically showing an electric motor 1 according to the first embodiment.
  • the electric motor 1 includes a rotor 2, a stator 3, a circuit board 4, a lead wire 5 connected to the circuit board 4, a molded resin 6 covering the stator 3 and the circuit board 4, and bearings 7a and 7b. It has a cover component 9 that covers a part of the lead wire 5.
  • the electric motor 1 further includes a bracket 8a.
  • the bracket 8a is fixed to the end of the molded resin 6 in the axial direction by press-fitting or screwing.
  • the bracket 8a is preferably made of metal or resin.
  • the bracket 8a When the bracket 8a is made of metal, the bracket 8a also functions as a heat sink, so the heat dissipation efficiency of the entire electric motor 1 is improved.
  • the bracket 8a When the bracket 8a is made of aluminum, the thermal conductivity of the bracket 8a can be increased, and the heat dissipation efficiency of the electric motor 1 as a whole can be further improved.
  • the bearings 7a and 7b may be held by the bracket 8a. In this case, it is possible to prevent electrolytic corrosion from occurring between the bearings 7a, 7b and the bracket 8a. As a result, vibration and noise in the electric motor 1 can be reduced.
  • the bracket 8a is made of resin, the bracket 8a may be formed as a part of the molded resin 6. Even in this case, occurrence of electrolytic corrosion between the bearings 7a, 7b and the bracket 8a can be prevented, and vibration and noise in the electric motor 1 can be reduced.
  • the electric motor 1 is, for example, a permanent magnet synchronous motor, but is not limited thereto.
  • Bearings 7a and 7b rotatably support shaft 22 of rotor 2.
  • the rotor 2 is rotatably arranged inside the stator 3. An air gap exists between the rotor 2 and the stator 3.
  • the rotor 2 has a rotor core 21 and a shaft 22.
  • the rotor 2 is rotatable around a rotation axis (ie, axis A1).
  • the rotor 2 may further include permanent magnets to form the magnetic poles of the rotor 2.
  • FIG. 2 is a side view schematically showing the stator 3.
  • FIG. 3 is a front view schematically showing the stator 3.
  • FIG. 2 is a side view schematically showing the stator 3.
  • FIG. 3 is a front view schematically showing the stator 3.
  • the stator 3 includes a stator core 31, at least one winding 32 (also referred to as a stator winding), and at least one insulating section 33.
  • the stator core 31 has at least one tooth 311.
  • stator core 31 has a plurality of teeth 311.
  • the stator core 31 is formed of a plurality of electromagnetic steel plates laminated in the axial direction.
  • each of the plurality of electromagnetic steel sheets is formed into a predetermined shape by a punching process.
  • These electromagnetic steel plates are fixed to each other by caulking, welding, adhesion, or the like.
  • the winding 32 is, for example, a magnet wire.
  • the winding 32 is wound around an insulating part 33.
  • a coil is formed by winding the winding 32 around the insulating part 33.
  • the winding 32 is electrically connected to a terminal 32a (also referred to as a winding terminal).
  • the end of the winding 32 is hooked onto the hook portion of the terminal 32a, and is fixed to the terminal 32a by fusing or soldering.
  • the terminal 32a is fixed to the insulating part 33 and electrically connected to the circuit board 4.
  • the insulating portion 33 is provided on each tooth 311, for example.
  • the insulating section 33 is combined with each tooth 311.
  • the insulating section 33 has at least one fixing section 331 that fixes the circuit board 4 .
  • the insulating portion 33 is, for example, a thermoplastic resin such as polybutylene terephthalate (PBT).
  • PBT polybutylene terephthalate
  • the insulating section 33 electrically insulates the stator core 31 (specifically, each tooth 311 of the stator core 31) and the winding 32.
  • the insulating portion 33 is molded integrally with the stator core 31.
  • the insulating portion 33 may be formed in advance and the formed insulating portion 33 may be combined with the stator core 31.
  • FIG. 4 is a front view schematically showing the circuit board 4 fixed to the stator 3.
  • the circuit board 4 has a positioning hole 43 (also simply referred to as a "hole") that engages with the fixing part 331 (specifically, the protrusion 331a) of the insulating part 33.
  • the circuit board 4 is fixed to the stator 3, for example.
  • the fixing part 331 of the insulating part 33 has a protrusion 331a and a support part 331b.
  • the protrusion 331a is inserted into a positioning hole 43 formed in the circuit board 4.
  • the protrusion 331a is fixed to the circuit board 4 (specifically, the positioning hole 43) by a fixing method such as thermal welding or ultrasonic welding.
  • the circuit board 4 is fixed to the insulating section 33.
  • the support portion 331b supports the circuit board 4 in the axial direction and positions the circuit board 4 in the axial direction.
  • the circuit board 4 is located on one end side of the stator 3 in the axial direction of the stator 3.
  • the circuit board 4 includes a drive circuit 42.
  • the drive circuit 42 is fixed to the circuit board 4.
  • the drive circuit 42 is a circuit for controlling the rotation of the rotor 2.
  • the drive circuit 42 includes, for example, a drive element 42a and a Hall IC (Integrated Circuit) 42b.
  • the drive element 42a is, for example, a power transistor.
  • the Hall IC 42b detects magnetic flux from the rotor 2 in order to detect the rotational position of the rotor 2.
  • the lead wire 5 has a first end 51 that is one end of the lead wire 5, and a second end 52 that is the other end of the lead wire 5.
  • lead wire 5 is directly connected to circuit board 4 .
  • the first end 51 of the lead wire 5 is fixed to the circuit board 4.
  • the first end 51 is covered with mold resin 6.
  • the second end 52 of the lead wire 5 is exposed outside the mold resin 6 and the cover component 9. A portion of the lead wire 5 between the first end 51 and the second end 52 is provided within the cover part 9 .
  • the mold resin 6 is a resin that covers the stator 3 and the circuit board 4.
  • the mold resin 6 is, for example, a thermosetting resin such as bulk molding compound (BMC).
  • BMC bulk molding compound
  • Bulk molding compounds are suitable for insert molding because they allow low pressure molding.
  • the mold resin 6 may be a thermoplastic resin such as polyphenylene sulfide (PPS).
  • PPS polyphenylene sulfide
  • stator core 31, the winding 32, the insulating part 33, and the mold resin 6 are integrally molded.
  • the stator core 31, the winding 32, the insulating section 33, and the molded resin 6 are integrated as one component (also referred to as a molded stator).
  • stator core 31, the winding 32, the insulating section 33, and the circuit board 4 are integrally molded with the mold resin 6.
  • the molded stator and the circuit board 4 are integrated as one component.
  • a part of the cover part 9 is fixed by the molded resin 6, and the other part of the cover part 9 is exposed outside the molded resin 6.
  • FIG. 5 is a sectional view showing the lead wire 5 provided in the cover component 9 shown in FIG.
  • the angle ⁇ 1 is the angle formed by the direction in which the lead wire 5 extends from the mold resin 6 into the inside of the cover component 9 and the direction in which the lead wire 5 extends from the inside of the cover component 9 to the outside of the cover component 9. .
  • the lead wire 5 is held by the cover component 9 so that ⁇ 1 ⁇ 135 degrees is satisfied.
  • ⁇ 2 is expressed as "180 degrees - ⁇ 1 degree". Therefore, the lead wire 5 is held by the cover component 9 so that 45 degrees ⁇ ⁇ 2 is satisfied.
  • the angle ⁇ 1 may be ⁇ 1 ⁇ 90 degrees. Furthermore, the angle ⁇ 1 may be ⁇ 1 ⁇ 90 degrees.
  • the cover component 9 is made of resin, for example.
  • FIG. 6 is a sectional view schematically showing the internal structure of the cover component 9.
  • the cover component 9 has a cavity 9A through which a portion of the lead wire 5 extends.
  • the lead wire 5 is curved within the cavity 9A.
  • at least one of the first component 91 and the second component 92 has a groove 9B into which a portion of the lead wire 5 is fitted.
  • the cavity 9A is formed by a groove 9B.
  • FIG. 7 is a diagram schematically showing an example of the cover component 9.
  • the cover component 9 is composed of a plurality of components.
  • the cover component 9 includes a first component 91 that covers a portion of the lead wire 5 and a second component 92 that covers a portion of the lead wire 5. In this case, a portion of the lead wire 5 is covered with the first component 91 and the second component 92.
  • the second component 92 is combined with the first component 91.
  • first part 91 and second part 92 are engaged with each other.
  • FIG. 8 is a cross-sectional view schematically showing the electric motor 1 according to the first modification.
  • FIG. 9 schematically shows the tube 93 held by the cover part 9 shown in FIG.
  • the electric motor 1 according to the first modification has a tube 93 that covers a part of the lead wire 5.
  • the tube 93 is sandwiched between a first part 91 and a second part 92.
  • a part of the cover part 9 is fixed by the molded resin 6, and the other part of the cover part 9 is exposed outside the molded resin 6. That is, the lead wire 5 extends from the outside of the electric motor 1 through the cover component 9 and into the molded resin 6, and the first end 51 of the lead wire 5 is fixed to the circuit board 4. .
  • the lead wire 5 is curved within the cover part 9. That is, the direction in which the lead wire 5 extends from the outside of the motor 1 into the inside of the cover component 9 is different from the direction in which the lead wire 5 extends from the inside of the cover component 9 into the inside of the molded resin 6. ing.
  • the cover component 9 is composed of multiple components, a part of the lead wire 5 can be easily placed inside the cover component 9. As a result, the electric motor 1 can be manufactured efficiently.
  • the cover part 9 When the cover part 9 is composed of a first part 91 and a second part 92, a part of the lead wire 5 can be held by the first part 91 and the second part 92. In other words, the position of the cover component 9 can be fixed with respect to the lead wire 5, and the electric motor 1 can be manufactured efficiently. Furthermore, the curve of the lead wire 5 can be easily maintained.
  • the position of the lead wire 5 in the cover component 9 can be easily fixed.
  • the electric motor 1 can be manufactured efficiently.
  • the curve of the lead wire 5 can be easily maintained.
  • the first part 91 and the second part 92 When the first part 91 and the second part 92 are engaged with each other, a part of the lead wire 5 can be easily held by the first part 91 and the second part 92. Furthermore, in the manufacturing process of the electric motor 1, the first part 91 and the second part 92 can be easily combined.
  • the cover component 9 has a cavity 9A
  • a part of the lead wire 5 is provided within the cavity 9A. That is, the lead wire 5 passes through the cavity 9A.
  • the cavity 9A it is desirable that a portion of the lead wire 5 not be in contact with the inner wall of the cover component 9.
  • the cover part 9 is made of resin.
  • the cover component 9 can be easily manufactured into various shapes.
  • the tube 93 When part of the lead wire 5 is covered by the tube 93 within the cover component 9, the part of the lead wire 5 can be protected by the tube 93. Furthermore, since the tube 93 can be fixed to the cover component 9 together with the lead wire 5, the electric motor 1 can be manufactured efficiently.
  • Embodiment 2 An air conditioner 10 (also referred to as a refrigeration air conditioner or a refrigeration cycle device) according to a second embodiment will be described.
  • FIG. 10 is a diagram schematically showing the configuration of an air conditioner 10 according to the second embodiment.
  • the air conditioner 10 includes an indoor unit 11 as a blower (also referred to as a first blower), and an outdoor unit 13 as a blower (also referred to as a second blower) connected to the indoor unit 11. has.
  • the air conditioner 10 includes an indoor unit 11, a refrigerant pipe 12, and an outdoor unit 13.
  • the outdoor unit 13 is connected to the indoor unit 11 through the refrigerant pipe 12.
  • the indoor unit 11 includes an electric motor 11a (for example, the electric motor 1 according to the first embodiment), an air blower 11b that blows air by being driven by the electric motor 11a, and a housing 11c that covers the electric motor 11a and the air blower 11b.
  • the blowing section 11b has, for example, a blade 11d driven by an electric motor 11a.
  • the blade 11d is fixed to the shaft of the electric motor 11a and generates an airflow.
  • the outdoor unit 13 includes an electric motor 13a (for example, the electric motor 1 according to the first embodiment), an air blower 13b, a compressor 14, a heat exchanger (not shown), an air blower 13b, a compressor 14, and a heat exchanger 13b, a compressor 14, and a heat exchanger (not shown). It has a housing 13c that covers the exchanger.
  • the blower section 13b blows air by being driven by the electric motor 13a.
  • the blower section 13b has, for example, a blade 13d driven by an electric motor 13a.
  • the blade 13d is fixed to the shaft of the electric motor 13a and generates an airflow.
  • the compressor 14 includes an electric motor 14a (for example, the electric motor 1 according to the first embodiment), a compression mechanism 14b (for example, a refrigerant circuit) driven by the electric motor 14a, and a housing 14c that covers the electric motor 14a and the compression mechanism 14b.
  • an electric motor 14a for example, the electric motor 1 according to the first embodiment
  • a compression mechanism 14b for example, a refrigerant circuit driven by the electric motor 14a
  • a housing 14c that covers the electric motor 14a and the compression mechanism 14b.
  • At least one of the indoor unit 11 and the outdoor unit 13 includes the electric motor 1 described in the first embodiment. That is, the indoor unit 11, the outdoor unit 13, or each of the indoor unit 11 and the outdoor unit 13 includes the electric motor 1 described in the first embodiment.
  • the electric motor 1 described in Embodiment 1 is applied to at least one of the electric motor 11a and the electric motor 13a as a drive source of the air blower. That is, the electric motor 1 described in the first embodiment is applied to the indoor unit 11, the outdoor unit 13, or each of the indoor unit 11 and the outdoor unit 13.
  • the electric motor 1 described in the first embodiment may be applied to the electric motor 14a of the compressor 14.
  • the air conditioner 10 can perform air conditioning such as a cooling operation in which cold air is blown from the indoor unit 11 and a heating operation in which warm air is blown.
  • the electric motor 11a is a drive source for driving the blower section 11b.
  • the blowing section 11b can blow the conditioned air.
  • the electric motor 11a is fixed to the housing 11c of the indoor unit 11 with, for example, screws.
  • the electric motor 13a is fixed to the housing 13c of the outdoor unit 13 with, for example, screws.
  • the electric motor 1 described in the first embodiment is applied to at least one of the electric motor 11a and the electric motor 13a, so that the same advantages as those described in the first embodiment are obtained. be able to. As a result, failure of the air conditioner 10 can be prevented.
  • the electric motor 1 according to the first embodiment when used as a drive source for a blower (for example, the indoor unit 11), the same advantages as described in the first embodiment can be obtained. As a result, failure of the blower can be prevented.
  • the blower having the electric motor 1 according to the first embodiment and the blades (for example, the blades 11d or 13d) driven by the electric motor 1 can be used alone as a device for blowing air. This blower can also be applied to devices other than the air conditioner 10.
  • the electric motor 1 according to the first embodiment is used as the drive source for the compressor 14, the same advantages as described in the first embodiment can be obtained. As a result, failure of the compressor 14 can be prevented.
  • the electric motor 1 described in Embodiment 1 can be installed in equipment having a drive source, such as a ventilation fan, home appliances, or a machine tool.

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  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

This electric motor (1) includes a stator (3), a circuit board (4), a mold resin (6) covering the stator (3) and the circuit board (4), a lead wire (5) connected to the circuit board (4), and a cover component (9) covering a portion of the lead wire (5). A first end (51) of the lead wire (5) is fixed to the circuit board (4). A second end (52) of the lead wire (5) protrudes to the outside of the cover component (9). A portion of the lead wire (5) is provided inside the cover component (9). When the angle formed between a direction in which the lead wire (5) extends from the mold resin (6) to the inside of the cover component (9), and a direction in which the lead wire (5) extends from the inside of the cover component (9) to the outside of the cover component (9) is defined as θ1, the lead wire (5) is held by the cover component (9) so as to satisfy θ1<135 degrees.

Description

電動機及び空気調和機Electric motor and air conditioner
　本開示は、電動機及び空気調和機に関する。 The present disclosure relates to an electric motor and an air conditioner.
　一般に、回路基板にリード線が接続された電動機が知られている（例えば、特許文献１参照）。 In general, electric motors in which lead wires are connected to a circuit board are known (for example, see Patent Document 1).
特開平５－３１６６８２号公報Japanese Patent Application Publication No. 5-316682
　しかしながら、従来の技術では、水蒸気がリード線とモールド樹脂との間の隙間を通して基板に到達し、この水蒸気が基板の故障を引き起こす場合がある。 However, in the conventional technology, water vapor reaches the substrate through the gap between the lead wire and the molding resin, and this water vapor may cause failure of the substrate.
　本開示の目的は、基板への水蒸気の浸入を防止することにより、基板の故障を防止することである。 An objective of the present disclosure is to prevent substrate failure by preventing water vapor from entering the substrate.
　本開示の電動機は、
　ステータと、
　回路基板と、
　前記ステータ及び前記回路基板を覆っているモールド樹脂と、
　前記回路基板に接続されたリード線と、
　前記リード線の一部を覆うカバー部品と
　を備え、
　前記カバー部品の一部は前記モールド樹脂によって固定されており、前記カバー部品の他の部分は前記モールド樹脂の外に出ており、
　前記リード線の第１の端部は、前記回路基板に固定されており、
　前記リード線の第２の端部は、前記カバー部品の外に出ており、
　前記第１の端部と前記第２の端部との間の前記リード線の前記一部は、前記カバー部品内に設けられており、
　前記リード線が前記モールド樹脂から前記カバー部品の内部に延在する方向と、前記リード線が前記カバー部品の前記内部から前記カバー部品の前記外に延在する方向とが成す角度をθ１としたとき、θ１＜１３５度を満たすように前記リード線が前記カバー部品によって保持されている。
　本開示の空気調和機は、
　室内機と、
　前記室内機に接続される室外機と
　を備え、
　前記室内機、前記室外機、又は前記室内機及び前記室外機の各々は、前記電動機を有する。 The electric motor of the present disclosure includes:
stator and
a circuit board;
a molded resin covering the stator and the circuit board;
a lead wire connected to the circuit board;
and a cover part that covers a part of the lead wire,
A part of the cover component is fixed by the mold resin, and another part of the cover component is exposed outside the mold resin,
a first end of the lead wire is fixed to the circuit board;
a second end of the lead wire extends outside the cover component;
the portion of the lead wire between the first end and the second end is provided within the cover component;
The angle formed by the direction in which the lead wire extends from the mold resin to the inside of the cover component and the direction in which the lead wire extends from the inside of the cover component to the outside of the cover component is defined as θ1. At this time, the lead wire is held by the cover component so that θ1<135 degrees.
The air conditioner of the present disclosure includes:
indoor unit and
an outdoor unit connected to the indoor unit;
The indoor unit, the outdoor unit, or each of the indoor unit and the outdoor unit includes the electric motor.
　本開示によれば、基板への水蒸気の浸入を防止することができ、基板の故障を防止することができる。 According to the present disclosure, it is possible to prevent water vapor from entering the substrate, and it is possible to prevent failure of the substrate.
実施の形態１に係る電動機を概略的に示す断面図である。1 is a cross-sectional view schematically showing an electric motor according to Embodiment 1. FIG. ステータを概略的に示す側面図である。FIG. 3 is a side view schematically showing a stator. ステータを概略的に示す正面図である。FIG. 2 is a front view schematically showing a stator. ステータに固定された回路基板（単に「基板」とも称する）を概略的に示す正面図である。FIG. 2 is a front view schematically showing a circuit board (also simply referred to as a "board") fixed to a stator. 図１に示される、カバー部品内に設けられたリード線を示す断面図である。FIG. 2 is a cross-sectional view of a lead wire provided within the cover component shown in FIG. 1; カバー部品の内部の構造を概略的に示す断面図である。FIG. 3 is a cross-sectional view schematically showing the internal structure of the cover component. カバー部品の一例を概略的に示す図である。It is a figure which shows roughly an example of a cover component. 変形例１に係る電動機を概略的に示す断面図である。FIG. 3 is a cross-sectional view schematically showing an electric motor according to modification example 1. 図８に示されるカバー部品に保持されたチューブを概略的に示す図である。Figure 9 schematically shows a tube held in the cover part shown in Figure 8; 実施の形態２に係る空気調和機の構成を概略的に示す図である。FIG. 2 is a diagram schematically showing the configuration of an air conditioner according to a second embodiment.
実施の形態１．
　実施の形態１に係る電動機１について以下に説明する。
　各図に示されるｘｙｚ直交座標系において、ｚ軸方向（ｚ軸）は、電動機１の軸線Ａ１と平行な方向を示し、ｘ軸方向（ｘ軸）は、ｚ軸方向に直交する方向を示し、ｙ軸方向（ｙ軸）は、ｚ軸方向及びｘ軸方向の両方に直交する方向を示す。軸線Ａ１は、ロータ２の回転中心、すなわち、ロータ２の回転軸である。軸線Ａ１と平行な方向は、「ロータ２の軸方向」又は単に「軸方向」とも称する。径方向は、ロータ２、ステータ３、又はステータコア３１の半径方向であり、軸線Ａ１と直交する方向である。ｘｙ平面は、軸方向と直交する平面である。矢印Ｄ１は、軸線Ａ１を中心とする周方向を示す。ロータ２、ステータ３、又はステータコア３１の周方向を、単に「周方向」とも称する。 Embodiment 1.
The electric motor 1 according to the first embodiment will be described below.
In the xyz orthogonal coordinate system shown in each figure, the z-axis direction (z-axis) indicates a direction parallel to the axis A1 of the electric motor 1, and the x-axis direction (x-axis) indicates a direction orthogonal to the z-axis direction. , the y-axis direction (y-axis) indicates a direction perpendicular to both the z-axis direction and the x-axis direction. The axis A1 is the rotation center of the rotor 2, that is, the rotation axis of the rotor 2. The direction parallel to the axis A1 is also referred to as the "axial direction of the rotor 2" or simply the "axial direction." The radial direction is the radial direction of the rotor 2, stator 3, or stator core 31, and is a direction perpendicular to the axis A1. The xy plane is a plane perpendicular to the axial direction. Arrow D1 indicates a circumferential direction centered on axis A1. The circumferential direction of the rotor 2, stator 3, or stator core 31 is also simply referred to as the "circumferential direction."
　図１は、実施の形態１に係る電動機１を概略的に示す断面図である。
　電動機１は、ロータ２と、ステータ３と、回路基板４と、回路基板４に接続されたリード線５と、ステータ３及び回路基板４を覆っているモールド樹脂６と、ベアリング７ａ，７ｂと、リード線５の一部を覆うカバー部品９とを有する。 FIG. 1 is a sectional view schematically showing an electric motor 1 according to the first embodiment.
The electric motor 1 includes a rotor 2, a stator 3, a circuit board 4, a lead wire 5 connected to the circuit board 4, a molded resin 6 covering the stator 3 and the circuit board 4, and bearings 7a and 7b. It has a cover component 9 that covers a part of the lead wire 5.
　図１に示される例では、電動機１は、さらに、ブラケット８ａを有する。例えば、ブラケット８ａは、圧入又はねじで、軸方向におけるモールド樹脂６の端部に固定されている。ブラケット８ａは、金属又は樹脂で作られていることが望ましい。 In the example shown in FIG. 1, the electric motor 1 further includes a bracket 8a. For example, the bracket 8a is fixed to the end of the molded resin 6 in the axial direction by press-fitting or screwing. The bracket 8a is preferably made of metal or resin.
　ブラケット８ａが金属で作られている場合、ブラケット８ａが放熱板の働きも有するため、電動機１全体の放熱効率が向上する。ブラケット８ａがアルミニウムで作られている場合、ブラケット８ａの熱伝導率を高めることができ、電動機１全体の放熱効率をより高めることができる。 When the bracket 8a is made of metal, the bracket 8a also functions as a heat sink, so the heat dissipation efficiency of the entire electric motor 1 is improved. When the bracket 8a is made of aluminum, the thermal conductivity of the bracket 8a can be increased, and the heat dissipation efficiency of the electric motor 1 as a whole can be further improved.
　ブラケット８ａが樹脂で作られている場合、ベアリング７ａ，７ｂがブラケット８ａによって保持されてもよい。この場合、ベアリング７ａ，７ｂとブラケット８ａとの間における電食の発生を防ぐことができる。その結果、電動機１における振動及び騒音を低減することができる。 If the bracket 8a is made of resin, the bearings 7a and 7b may be held by the bracket 8a. In this case, it is possible to prevent electrolytic corrosion from occurring between the bearings 7a, 7b and the bracket 8a. As a result, vibration and noise in the electric motor 1 can be reduced.
　ブラケット８ａが樹脂で作られている場合、ブラケット８ａは、モールド樹脂６の一部として形成されてもよい。この場合でも、ベアリング７ａ，７ｂとブラケット８ａとの間における電食の発生を防ぐことができ、電動機１における振動及び騒音を低減することができる。 If the bracket 8a is made of resin, the bracket 8a may be formed as a part of the molded resin 6. Even in this case, occurrence of electrolytic corrosion between the bearings 7a, 7b and the bracket 8a can be prevented, and vibration and noise in the electric motor 1 can be reduced.
　電動機１は、例えば、永久磁石同期電動機であるが、これに限定されない。ベアリング７ａ及び７ｂは、ロータ２のシャフト２２を回転自在に支持する。 The electric motor 1 is, for example, a permanent magnet synchronous motor, but is not limited thereto. Bearings 7a and 7b rotatably support shaft 22 of rotor 2.
　ロータ２は、ステータ３の内側に回転可能に配置されている。ロータ２とステータ３との間には、エアギャップが存在する。ロータ２は、ロータコア２１と、シャフト２２とを有する。ロータ２は、回転軸（すなわち、軸線Ａ１）を中心として回転可能である。ロータ２は、さらに、ロータ２の磁極を形成するための永久磁石を有してもよい。 The rotor 2 is rotatably arranged inside the stator 3. An air gap exists between the rotor 2 and the stator 3. The rotor 2 has a rotor core 21 and a shaft 22. The rotor 2 is rotatable around a rotation axis (ie, axis A1). The rotor 2 may further include permanent magnets to form the magnetic poles of the rotor 2.
　図２は、ステータ３を概略的に示す側面図である。
　図３は、ステータ３を概略的に示す正面図である。 FIG. 2 is a side view schematically showing the stator 3. As shown in FIG.
FIG. 3 is a front view schematically showing the stator 3. As shown in FIG.
　ステータ３は、ステータコア３１と、少なくとも１つの巻線３２（ステータ巻線とも称する）と、少なくとも１つの絶縁部３３とを有する。 The stator 3 includes a stator core 31, at least one winding 32 (also referred to as a stator winding), and at least one insulating section 33.
　ステータコア３１は、少なくとも１つのティース３１１を有する。本実施の形態では、ステータコア３１は、複数のティース３１１を有する。例えば、ステータコア３１は、軸方向に積層された複数の電磁鋼板で形成されている。この場合、複数の電磁鋼板の各々は、打ち抜き処理によって、予め定められた形状に形成される。これらの電磁鋼板は、かしめ、溶接、又は接着等によって互いに固定される。 The stator core 31 has at least one tooth 311. In this embodiment, stator core 31 has a plurality of teeth 311. For example, the stator core 31 is formed of a plurality of electromagnetic steel plates laminated in the axial direction. In this case, each of the plurality of electromagnetic steel sheets is formed into a predetermined shape by a punching process. These electromagnetic steel plates are fixed to each other by caulking, welding, adhesion, or the like.
　巻線３２は、例えば、マグネットワイヤーである。巻線３２は、絶縁部３３に巻かれている。巻線３２が、絶縁部３３に巻回されることによりコイルが形成される。巻線３２は、端子３２ａ（巻線端子とも称する）と電気的に接続されている。図２に示される例では、巻線３２の端部は、端子３２ａのフック部に引っ掛けられており、ヒュージング又は半田によって端子３２ａに固定されている。端子３２ａは、絶縁部３３に固定されており、回路基板４と電気的に接続されている。 The winding 32 is, for example, a magnet wire. The winding 32 is wound around an insulating part 33. A coil is formed by winding the winding 32 around the insulating part 33. The winding 32 is electrically connected to a terminal 32a (also referred to as a winding terminal). In the example shown in FIG. 2, the end of the winding 32 is hooked onto the hook portion of the terminal 32a, and is fixed to the terminal 32a by fusing or soldering. The terminal 32a is fixed to the insulating part 33 and electrically connected to the circuit board 4.
　絶縁部３３は、例えば、各ティース３１１に設けられている。例えば、絶縁部３３は、各ティース３１１と組み合わされている。絶縁部３３は、回路基板４を固定する少なくとも１つの固定部３３１を有する。絶縁部３３は、例えば、ポリブチレンテレフタレート（ＰＢＴ）等の熱可塑性樹脂である。絶縁部３３は、ステータコア３１（具体的には、ステータコア３１の各ティース３１１）を及び巻線３２を電気的に絶縁する。例えば、絶縁部３３は、ステータコア３１と一体に成形される。ただし、予め絶縁部３３を成形し、成形された絶縁部３３をステータコア３１と組み合わせてもよい。 The insulating portion 33 is provided on each tooth 311, for example. For example, the insulating section 33 is combined with each tooth 311. The insulating section 33 has at least one fixing section 331 that fixes the circuit board 4 . The insulating portion 33 is, for example, a thermoplastic resin such as polybutylene terephthalate (PBT). The insulating section 33 electrically insulates the stator core 31 (specifically, each tooth 311 of the stator core 31) and the winding 32. For example, the insulating portion 33 is molded integrally with the stator core 31. However, the insulating portion 33 may be formed in advance and the formed insulating portion 33 may be combined with the stator core 31.
　図４は、ステータ３に固定された回路基板４を概略的に示す正面図である。
　回路基板４は、絶縁部３３の固定部３３１（具体的には、突起３３１ａ）と係合する位置決め穴４３（単に「穴」とも称する）を有する。回路基板４は、例えば、ステータ３に固定される。 FIG. 4 is a front view schematically showing the circuit board 4 fixed to the stator 3.
The circuit board 4 has a positioning hole 43 (also simply referred to as a "hole") that engages with the fixing part 331 (specifically, the protrusion 331a) of the insulating part 33. The circuit board 4 is fixed to the stator 3, for example.
　絶縁部３３の固定部３３１は、突起３３１ａと支持部３３１ｂとを有する。突起３３１ａは、回路基板４に形成された位置決め穴４３に挿入されている。例えば、突起３３１ａは、熱溶着、超音波溶着などの固定方法で回路基板４（具体的には、位置決め穴４３）に固定される。その結果、回路基板４が絶縁部３３に固定される。支持部３３１ｂは、回路基板４を軸方向に支持し、軸方向において回路基板４を位置決めする。回路基板４は、ステータ３の軸方向におけるステータ３の一端側に位置している。 The fixing part 331 of the insulating part 33 has a protrusion 331a and a support part 331b. The protrusion 331a is inserted into a positioning hole 43 formed in the circuit board 4. For example, the protrusion 331a is fixed to the circuit board 4 (specifically, the positioning hole 43) by a fixing method such as thermal welding or ultrasonic welding. As a result, the circuit board 4 is fixed to the insulating section 33. The support portion 331b supports the circuit board 4 in the axial direction and positions the circuit board 4 in the axial direction. The circuit board 4 is located on one end side of the stator 3 in the axial direction of the stator 3.
　回路基板４は、駆動回路４２を含む。駆動回路４２は、回路基板４に固定されている。駆動回路４２は、ロータ２の回転を制御するための回路である。駆動回路４２は、例えば、駆動素子４２ａ及びホールＩＣ（Ｉｎｔｅｇｒａｔｅｄ　Ｃｉｒｃｕｉｔ）４２ｂを含む。 The circuit board 4 includes a drive circuit 42. The drive circuit 42 is fixed to the circuit board 4. The drive circuit 42 is a circuit for controlling the rotation of the rotor 2. The drive circuit 42 includes, for example, a drive element 42a and a Hall IC (Integrated Circuit) 42b.
　駆動素子４２ａは、例えば、パワートランジスタである。ホールＩＣ４２ｂは、ロータ２の回転位置を検出するために、ロータ２からの磁束を検出する。 The drive element 42a is, for example, a power transistor. The Hall IC 42b detects magnetic flux from the rotor 2 in order to detect the rotational position of the rotor 2.
　図１に示されるように、リード線５は、リード線５の一端部である第１の端部５１と、リード線５の他端部である第２の端部５２とを有する。本実施の形態では、リード線５は、回路基板４に直接接続されている。具体的には、リード線５の第１の端部５１は、回路基板４に固定されている。図１に示される例では、第１の端部５１は、モールド樹脂６で覆われている。リード線５の第２の端部５２は、モールド樹脂６及びカバー部品９の外に出ている。第１の端部５１と第２の端部５２との間のリード線５の一部は、カバー部品９内に設けられている。 As shown in FIG. 1, the lead wire 5 has a first end 51 that is one end of the lead wire 5, and a second end 52 that is the other end of the lead wire 5. In this embodiment, lead wire 5 is directly connected to circuit board 4 . Specifically, the first end 51 of the lead wire 5 is fixed to the circuit board 4. In the example shown in FIG. 1, the first end 51 is covered with mold resin 6. The second end 52 of the lead wire 5 is exposed outside the mold resin 6 and the cover component 9. A portion of the lead wire 5 between the first end 51 and the second end 52 is provided within the cover part 9 .
　モールド樹脂６は、ステータ３及び回路基板４を覆っている樹脂である。モールド樹脂６は、例えば、バルクモールディングコンパウンド（ＢＭＣ）などの熱硬化性樹脂である。バルクモールディングコンパウンドは、低圧成形を可能にするため、インサート成形に適している。モールド樹脂６としてバルクモールディングコンパウンドを用いた場合、金型を用いてモールド樹脂６の成形を行うときに、回路基板４又はステータコア３１などのインサート物の変形を防止することができ、電動機１の品質を向上させることができる。 The mold resin 6 is a resin that covers the stator 3 and the circuit board 4. The mold resin 6 is, for example, a thermosetting resin such as bulk molding compound (BMC). Bulk molding compounds are suitable for insert molding because they allow low pressure molding. When a bulk molding compound is used as the mold resin 6, deformation of inserts such as the circuit board 4 or the stator core 31 can be prevented when molding the mold resin 6 using a mold, and the quality of the electric motor 1 can be improved. can be improved.
　モールド樹脂６は、ポリフェニレンスルファイド（ＰＰＳ）などの熱可塑性樹脂でもよい。 The mold resin 6 may be a thermoplastic resin such as polyphenylene sulfide (PPS).
　ステータコア３１、巻線３２、及び絶縁部３３、モールド樹脂６で一体に成形されている。言い換えると、ステータコア３１、巻線３２、絶縁部３３、及びモールド樹脂６は、１つの構成要素（モールド固定子とも称する）として一体化されている。 The stator core 31, the winding 32, the insulating part 33, and the mold resin 6 are integrally molded. In other words, the stator core 31, the winding 32, the insulating section 33, and the molded resin 6 are integrated as one component (also referred to as a molded stator).
　本実施の形態では、ステータコア３１、巻線３２、絶縁部３３、及び回路基板４は、モールド樹脂６で一体に成形されている。言い換えると、モールド固定子及び回路基板４は、１つの構成要素として一体化されている。 In this embodiment, the stator core 31, the winding 32, the insulating section 33, and the circuit board 4 are integrally molded with the mold resin 6. In other words, the molded stator and the circuit board 4 are integrated as one component.
　カバー部品９の一部はモールド樹脂６によって固定されており、カバー部品９の他の部分はモールド樹脂６の外に出ている。 A part of the cover part 9 is fixed by the molded resin 6, and the other part of the cover part 9 is exposed outside the molded resin 6.
　図５は、図１に示される、カバー部品９内に設けられたリード線５を示す断面図である。
　角度θ１は、リード線５がモールド樹脂６からカバー部品９の内部に延在する方向と、リード線５がカバー部品９の内部からカバー部品９の外に延在する方向とが成す角度である。この場合、θ１＜１３５度を満たすようにリード線５がカバー部品９によって保持されている。θ２は、「１８０度－θ１度」で示される。したがって、４５度＜θ２を満たすようにリード線５がカバー部品９によって保持されている。 FIG. 5 is a sectional view showing the lead wire 5 provided in the cover component 9 shown in FIG.
The angle θ1 is the angle formed by the direction in which the lead wire 5 extends from the mold resin 6 into the inside of the cover component 9 and the direction in which the lead wire 5 extends from the inside of the cover component 9 to the outside of the cover component 9. . In this case, the lead wire 5 is held by the cover component 9 so that θ1<135 degrees is satisfied. θ2 is expressed as "180 degrees - θ1 degree". Therefore, the lead wire 5 is held by the cover component 9 so that 45 degrees < θ2 is satisfied.
　角度θ１は、θ１≦９０度でもよい。さらに、角度θ１は、θ１＜９０度でもよい。 The angle θ1 may be θ1≦90 degrees. Furthermore, the angle θ1 may be θ1<90 degrees.
　カバー部品９は、例えば、樹脂で作られている。 The cover component 9 is made of resin, for example.
　図６は、カバー部品９の内部の構造を概略的に示す断面図である。
　カバー部品９は、リード線５の一部が延在する空洞部９Ａを有する。リード線５は、空洞部９Ａ内で湾曲している。図６に示される例では、第１の部品９１又は第２の部品９２の少なくとも一方は、リード線５の一部がはめ込まれる溝９Ｂを有する。この場合、空洞部９Ａは、溝９Ｂによって形成されている。 FIG. 6 is a sectional view schematically showing the internal structure of the cover component 9. As shown in FIG.
The cover component 9 has a cavity 9A through which a portion of the lead wire 5 extends. The lead wire 5 is curved within the cavity 9A. In the example shown in FIG. 6, at least one of the first component 91 and the second component 92 has a groove 9B into which a portion of the lead wire 5 is fitted. In this case, the cavity 9A is formed by a groove 9B.
　図７は、カバー部品９の一例を概略的に示す図である。
　カバー部品９は、複数の部品で構成されている。図７に示される例では、カバー部品９は、リード線５の一部を覆う第１の部品９１と、リード線５の一部を覆う第２の部品９２とを有する。この場合、リード線５の一部は、第１の部品９１と第２の部品９２とで覆われている。 FIG. 7 is a diagram schematically showing an example of the cover component 9. As shown in FIG.
The cover component 9 is composed of a plurality of components. In the example shown in FIG. 7, the cover component 9 includes a first component 91 that covers a portion of the lead wire 5 and a second component 92 that covers a portion of the lead wire 5. In this case, a portion of the lead wire 5 is covered with the first component 91 and the second component 92.
　図７に示される例では、第２の部品９２は、第１の部品９１と組み合わされている。例えば、第１の部品９１及び第２の部品９２は、互いに係合している。 In the example shown in FIG. 7, the second component 92 is combined with the first component 91. For example, first part 91 and second part 92 are engaged with each other.
変形例１．
　本実施の形態に係る電動機１の他の例としての変形例１に係る電動機１を以下に説明する。
　図８は、変形例１に係る電動機１を概略的に示す断面図である。
　図９は、図８に示されるカバー部品９に保持されたチューブ９３を概略的に示す図である。
　変形例１に係る電動機１は、リード線５の一部を覆うチューブ９３を有する。チューブ９３は、第１の部品９１及び第２の部品９２によって挟まれている。 Modification example 1.
The electric motor 1 according to Modification 1 as another example of the electric motor 1 according to the present embodiment will be described below.
FIG. 8 is a cross-sectional view schematically showing the electric motor 1 according to the first modification.
FIG. 9 schematically shows the tube 93 held by the cover part 9 shown in FIG.
The electric motor 1 according to the first modification has a tube 93 that covers a part of the lead wire 5. The tube 93 is sandwiched between a first part 91 and a second part 92.
〈本実施の形態の利点〉
　一般に、回路基板に水が付着すると、回路基板のショートに起因する電動機の故障が発生する。特に、リード線の一端が基板に直接接続されている場合、リード線の他端が電動機の外部に露出しているので、リード線を伝って回路基板に水が付着することを防ぐことが重要である。特に、水蒸気に含まれる粒子は、水に含まれる粒子に比べて細かい。したがって、基板がモールド樹脂で覆われている電動機では、水蒸気がリード線とモールド樹脂との間の隙間を通して回路基板に到達しやすい。 <Advantages of this embodiment>
Generally, when water adheres to a circuit board, a motor failure occurs due to a short circuit on the circuit board. In particular, when one end of the lead wire is directly connected to the circuit board, the other end of the lead wire is exposed to the outside of the motor, so it is important to prevent water from adhering to the circuit board through the lead wire. It is. In particular, the particles contained in water vapor are finer than those contained in water. Therefore, in a motor whose board is covered with molded resin, water vapor easily reaches the circuit board through the gap between the lead wire and the molded resin.
　これに対して、本実施の形態では、カバー部品９の一部はモールド樹脂６によって固定されており、カバー部品９の他の部分はモールド樹脂６の外に出ている。すなわち、リード線５は、電動機１の外部からカバー部品９内を介してモールド樹脂６の内部に延在しており、リード線５の第１の端部５１は回路基板４に固定されている。リード線５は、カバー部品９内で湾曲している。すなわち、リード線５が電動機１の外部からカバー部品９の内部に延在している方向と、リード線５がカバー部品９の内部からモールド樹脂６の内部に延在している方向とが異なっている。 On the other hand, in the present embodiment, a part of the cover part 9 is fixed by the molded resin 6, and the other part of the cover part 9 is exposed outside the molded resin 6. That is, the lead wire 5 extends from the outside of the electric motor 1 through the cover component 9 and into the molded resin 6, and the first end 51 of the lead wire 5 is fixed to the circuit board 4. . The lead wire 5 is curved within the cover part 9. That is, the direction in which the lead wire 5 extends from the outside of the motor 1 into the inside of the cover component 9 is different from the direction in which the lead wire 5 extends from the inside of the cover component 9 into the inside of the molded resin 6. ing.
　この構成により、カバー部品９内において、リード線５とカバー部品９との間の隙間が存在する場合であっても、その隙間は湾曲している。言い換えると、カバー部品９内において水蒸気が通過し得る経路が湾曲している。したがって、水蒸気が、電動機１の外部からカバー部品９内に入り込んだ場合でも、水蒸気がカバー部品９の内部で止まり、水蒸気が回路基板４に到達することを防ぐことができる。 With this configuration, even if a gap exists between the lead wire 5 and the cover component 9 within the cover component 9, the gap is curved. In other words, the path through which water vapor can pass within the cover component 9 is curved. Therefore, even if water vapor enters the cover component 9 from the outside of the electric motor 1, the water vapor stops inside the cover component 9 and can be prevented from reaching the circuit board 4.
　さらに、θ１＜１３５度を満たすようにリード線５がカバー部品９によって保持されている場合、水蒸気が回路基板４に到達することを効果的に防ぐことができる。 Further, when the lead wire 5 is held by the cover component 9 so that θ1<135 degrees is satisfied, water vapor can be effectively prevented from reaching the circuit board 4.
　カバー部品９が複数の部品で構成されている場合、リード線５の一部をカバー部品９内に容易に配置することができる。その結果、電動機１を効率的に製造することができる。 When the cover component 9 is composed of multiple components, a part of the lead wire 5 can be easily placed inside the cover component 9. As a result, the electric motor 1 can be manufactured efficiently.
　カバー部品９が第１の部品９１と第２の部品９２とで構成されている場合、リード線５の一部を、第１の部品９１と第２の部品９２とで保持することができる。言い換えると、リード線５に対してカバー部品９の位置を固定することができ、電動機１を効率的に製造することができる。さらに、リード線５の湾曲を容易に維持することができる。 When the cover part 9 is composed of a first part 91 and a second part 92, a part of the lead wire 5 can be held by the first part 91 and the second part 92. In other words, the position of the cover component 9 can be fixed with respect to the lead wire 5, and the electric motor 1 can be manufactured efficiently. Furthermore, the curve of the lead wire 5 can be easily maintained.
　第１の部品９１又は第２の部品９２の少なくとも一方が溝９Ｂを有する場合、カバー部品９におけるリード線５の位置を容易に固定することができる。その結果、電動機１を効率的に製造することができる。さらに、リード線５の湾曲を容易に維持することができる。 When at least one of the first component 91 and the second component 92 has the groove 9B, the position of the lead wire 5 in the cover component 9 can be easily fixed. As a result, the electric motor 1 can be manufactured efficiently. Furthermore, the curve of the lead wire 5 can be easily maintained.
　第１の部品９１及び第２の部品９２が互いに係合している場合、リード線５の一部を、第１の部品９１と第２の部品９２とで容易に保持することができる。さらに、電動機１の製造工程において、第１の部品９１と第２の部品９２とを容易に組み合わせることができる。 When the first part 91 and the second part 92 are engaged with each other, a part of the lead wire 5 can be easily held by the first part 91 and the second part 92. Furthermore, in the manufacturing process of the electric motor 1, the first part 91 and the second part 92 can be easily combined.
　カバー部品９が空洞部９Ａを有する場合、リード線５の一部は、空洞部９Ａ内に設けられている。すなわち、空洞部９Ａをリード線５が通っている。空洞部９Ａにおいて、リード線５の一部は、カバー部品９の内壁に接触していないことが望ましい。この構成により、水が、電動機１の外からカバー部品９の内部に入り込んだ場合でも、空洞部９Ａに水を溜めることができる。その結果、水が電動機１の外からカバー部品９の内部に入り込んだ場合でも、水が空洞部９Ａで止まり、水が回路基板４に到達することを防ぐことができる。 When the cover component 9 has a cavity 9A, a part of the lead wire 5 is provided within the cavity 9A. That is, the lead wire 5 passes through the cavity 9A. In the cavity 9A, it is desirable that a portion of the lead wire 5 not be in contact with the inner wall of the cover component 9. With this configuration, even if water enters the inside of the cover component 9 from outside the electric motor 1, the water can be stored in the cavity 9A. As a result, even if water enters the inside of the cover component 9 from outside the electric motor 1, the water stops in the cavity 9A and can be prevented from reaching the circuit board 4.
　リード線５が空洞部９Ａ内で湾曲している場合、カバー部品９内において水蒸気が通過し得る経路が湾曲している。したがって、水蒸気が、電動機１の外部からカバー部品９内に入り込んだ場合でも、水蒸気がカバー部品９の内部で止まり、水蒸気がリード線５とモールド樹脂６との間の隙間を通して回路基板４に到達することを防ぐことができる。 When the lead wire 5 is curved within the cavity 9A, the path through which water vapor can pass within the cover component 9 is curved. Therefore, even if water vapor enters the cover part 9 from outside the motor 1, the water vapor stops inside the cover part 9 and reaches the circuit board 4 through the gap between the lead wire 5 and the molded resin 6. can be prevented from happening.
　カバー部品９が樹脂で作られていることが望ましい。この場合、カバー部品９を様々な形状に容易に作製することができる。 It is desirable that the cover part 9 is made of resin. In this case, the cover component 9 can be easily manufactured into various shapes.
　カバー部品９内においてリード線５の一部がチューブ９３によって覆われている場合、リード線５の一部をチューブ９３で保護することができる。さらに、リード線５と共にチューブ９３をカバー部品９に固定することができるので、電動機１を効率的に製造することができる。 When part of the lead wire 5 is covered by the tube 93 within the cover component 9, the part of the lead wire 5 can be protected by the tube 93. Furthermore, since the tube 93 can be fixed to the cover component 9 together with the lead wire 5, the electric motor 1 can be manufactured efficiently.
　チューブ９３が第１の部品９１及び第２の部品９２によって挟まれている場合、カバー部品９の開口におけるリード線５とカバー部品９との間の隙間を小さくすることができる。その結果、水蒸気が、電動機１の外部からカバー部品９内に入り込むことを効果的に防ぐことができる。 When the tube 93 is sandwiched between the first component 91 and the second component 92, the gap between the lead wire 5 and the cover component 9 at the opening of the cover component 9 can be reduced. As a result, water vapor can be effectively prevented from entering the cover component 9 from the outside of the electric motor 1.
実施の形態２．
　実施の形態２に係る空気調和機１０（冷凍空調装置又は冷凍サイクル装置とも称する）について説明する。
　図１０は、実施の形態２に係る空気調和機１０の構成を概略的に示す図である。 Embodiment 2.
An air conditioner 10 (also referred to as a refrigeration air conditioner or a refrigeration cycle device) according to a second embodiment will be described.
FIG. 10 is a diagram schematically showing the configuration of an air conditioner 10 according to the second embodiment.
　実施の形態２に係る空気調和機１０は、送風機（第１の送風機とも称する）としての室内機１１と、室内機１１に接続される送風機（第２の送風機とも称する）としての室外機１３とを有する。 The air conditioner 10 according to the second embodiment includes an indoor unit 11 as a blower (also referred to as a first blower), and an outdoor unit 13 as a blower (also referred to as a second blower) connected to the indoor unit 11. has.
　本実施の形態では、空気調和機１０は、室内機１１と、冷媒配管１２と、室外機１３とを有する。例えば、室外機１３は、冷媒配管１２を通して室内機１１に接続される。 In this embodiment, the air conditioner 10 includes an indoor unit 11, a refrigerant pipe 12, and an outdoor unit 13. For example, the outdoor unit 13 is connected to the indoor unit 11 through the refrigerant pipe 12.
　室内機１１は、電動機１１ａ（例えば、実施の形態１に係る電動機１）と、電動機１１ａによって駆動されることにより、送風する送風部１１ｂと、電動機１１ａ及び送風部１１ｂを覆うハウジング１１ｃとを有する。送風部１１ｂは、例えば、電動機１１ａによって駆動される羽根１１ｄを有する。例えば、羽根１１ｄは、電動機１１ａのシャフトに固定されており、気流を生成する。 The indoor unit 11 includes an electric motor 11a (for example, the electric motor 1 according to the first embodiment), an air blower 11b that blows air by being driven by the electric motor 11a, and a housing 11c that covers the electric motor 11a and the air blower 11b. . The blowing section 11b has, for example, a blade 11d driven by an electric motor 11a. For example, the blade 11d is fixed to the shaft of the electric motor 11a and generates an airflow.
　室外機１３は、電動機１３ａ（例えば、実施の形態１に係る電動機１）と、送風部１３ｂと、圧縮機１４と、熱交換器（図示しない）と、送風部１３ｂ、圧縮機１４、及び熱交換器を覆うハウジング１３ｃとを有する。送風部１３ｂは、電動機１３ａによって駆動されることにより、送風する。送風部１３ｂは、例えば、電動機１３ａによって駆動される羽根１３ｄを有する。例えば、羽根１３ｄは、電動機１３ａのシャフトに固定されており、気流を生成する。圧縮機１４は、電動機１４ａ（例えば、実施の形態１に係る電動機１）と、電動機１４ａによって駆動される圧縮機構１４ｂ（例えば、冷媒回路）と、電動機１４ａ及び圧縮機構１４ｂを覆うハウジング１４ｃとを有する。 The outdoor unit 13 includes an electric motor 13a (for example, the electric motor 1 according to the first embodiment), an air blower 13b, a compressor 14, a heat exchanger (not shown), an air blower 13b, a compressor 14, and a heat exchanger 13b, a compressor 14, and a heat exchanger (not shown). It has a housing 13c that covers the exchanger. The blower section 13b blows air by being driven by the electric motor 13a. The blower section 13b has, for example, a blade 13d driven by an electric motor 13a. For example, the blade 13d is fixed to the shaft of the electric motor 13a and generates an airflow. The compressor 14 includes an electric motor 14a (for example, the electric motor 1 according to the first embodiment), a compression mechanism 14b (for example, a refrigerant circuit) driven by the electric motor 14a, and a housing 14c that covers the electric motor 14a and the compression mechanism 14b. have
　空気調和機１０において、室内機１１及び室外機１３の少なくとも１つは、実施の形態１で説明した電動機１を有する。すなわち、室内機１１、室外機１３、又は室内機１１及び室外機１３の各々は、実施の形態１で説明した電動機１を有する。具体的には、送風部の駆動源として、電動機１１ａ又は電動機１３ａの少なくとも一方に、実施の形態１で説明した電動機１が適用される。すなわち、室内機１１、室外機１３、又は室内機１１及び室外機１３の各々に、実施の形態１で説明した電動機１が適用される。圧縮機１４の電動機１４ａに、実施の形態１で説明した電動機１を適用してもよい。 In the air conditioner 10, at least one of the indoor unit 11 and the outdoor unit 13 includes the electric motor 1 described in the first embodiment. That is, the indoor unit 11, the outdoor unit 13, or each of the indoor unit 11 and the outdoor unit 13 includes the electric motor 1 described in the first embodiment. Specifically, the electric motor 1 described in Embodiment 1 is applied to at least one of the electric motor 11a and the electric motor 13a as a drive source of the air blower. That is, the electric motor 1 described in the first embodiment is applied to the indoor unit 11, the outdoor unit 13, or each of the indoor unit 11 and the outdoor unit 13. The electric motor 1 described in the first embodiment may be applied to the electric motor 14a of the compressor 14.
　空気調和機１０は、例えば、室内機１１から冷たい空気を送風する冷房運転、温かい空気を送風する暖房運転などの空調を行うことができる。室内機１１において、電動機１１ａは、送風部１１ｂを駆動するための駆動源である。送風部１１ｂは、調整された空気を送風することができる。 The air conditioner 10 can perform air conditioning such as a cooling operation in which cold air is blown from the indoor unit 11 and a heating operation in which warm air is blown. In the indoor unit 11, the electric motor 11a is a drive source for driving the blower section 11b. The blowing section 11b can blow the conditioned air.
　室内機１１において、電動機１１ａは、例えば、ねじによって室内機１１のハウジング１１ｃに固定されている。室外機１３において、電動機１３ａは、例えば、ねじによって室外機１３のハウジング１３ｃに固定されている。 In the indoor unit 11, the electric motor 11a is fixed to the housing 11c of the indoor unit 11 with, for example, screws. In the outdoor unit 13, the electric motor 13a is fixed to the housing 13c of the outdoor unit 13 with, for example, screws.
　実施の形態２に係る空気調和機１０では、電動機１１ａ又は電動機１３ａの少なくとも一方に、実施の形態１で説明した電動機１が適用されるので、実施の形態１で説明した利点と同じ利点を得ることができる。その結果、空気調和機１０の故障を防ぐことができる。 In the air conditioner 10 according to the second embodiment, the electric motor 1 described in the first embodiment is applied to at least one of the electric motor 11a and the electric motor 13a, so that the same advantages as those described in the first embodiment are obtained. be able to. As a result, failure of the air conditioner 10 can be prevented.
　さらに、送風機（例えば、室内機１１）の駆動源として、実施の形態１に係る電動機１が用いられる場合、実施の形態１で説明した利点と同じ利点を得ることができる。その結果、送風機の故障を防ぐことができる。実施の形態１に係る電動機１と電動機１によって駆動される羽根（例えば、羽根１１ｄ又は羽根１３ｄ）とを有する送風機は、送風する装置として単独で用いることができる。この送風機は、空気調和機１０以外の機器にも適用可能である。 Furthermore, when the electric motor 1 according to the first embodiment is used as a drive source for a blower (for example, the indoor unit 11), the same advantages as described in the first embodiment can be obtained. As a result, failure of the blower can be prevented. The blower having the electric motor 1 according to the first embodiment and the blades (for example, the blades 11d or 13d) driven by the electric motor 1 can be used alone as a device for blowing air. This blower can also be applied to devices other than the air conditioner 10.
　さらに、圧縮機１４の駆動源として、実施の形態１に係る電動機１が用いられる場合、実施の形態１で説明した利点と同じ利点を得ることができる。その結果、圧縮機１４の故障を防ぐことができる。 Furthermore, when the electric motor 1 according to the first embodiment is used as the drive source for the compressor 14, the same advantages as described in the first embodiment can be obtained. As a result, failure of the compressor 14 can be prevented.
　実施の形態１で説明した電動機１は、空気調和機１０以外に、換気扇、家電機器、又は工作機など、駆動源を有する機器に搭載できる。 In addition to the air conditioner 10, the electric motor 1 described in Embodiment 1 can be installed in equipment having a drive source, such as a ventilation fan, home appliances, or a machine tool.
　以上に説明した各実施の形態における特徴及び各変形例における特徴は、互いに組み合わせることができる。 The features of each embodiment and the features of each modification described above can be combined with each other.
　１，１１ａ，１３ａ，１４ａ　電動機、　２　ロータ、　３　ステータ、　４　回路基板、　５　リード線、　６　モールド樹脂、　７ａ，７ｂ　ベアリング、　８ａ　ブラケット、　９　カバー部品、　９Ａ　空洞部、　１０　空気調和機、　１１　室内機、　１２　冷媒配管、　１３　室外機、　３１　ステータコア、　３２　巻線、　３３　絶縁部、　４２　駆動回路、　５１　第１の端部、　５２　第２の端部、　９１　第１の部品、　９２　第２の部品、　９３　チューブ。 1, 11a, 13a, 14a electric motor, 2 rotor, 3 stator, 4 circuit board, 5 lead wire, 6 molded resin, 7a, 7b bearing, 8a bracket, 9 cover parts, 9A cavity, 10 Air conditioner, 11 Indoor machine, 12 refrigerant piping, 13 outdoor unit, 31 stator core, 32 winding, 33 insulation section, 42 drive circuit, 51 first end, 52 second end, 91 first part, 92 second part , 93 tube.

Claims (10)

  1. 　ステータと、
    　回路基板と、
    　前記ステータ及び前記回路基板を覆っているモールド樹脂と、
    　前記回路基板に接続されたリード線と、
    　前記リード線の一部を覆うカバー部品と
    　を備え、
    　前記カバー部品の一部は前記モールド樹脂によって固定されており、前記カバー部品の他の部分は前記モールド樹脂の外に出ており、
    　前記リード線の第１の端部は、前記回路基板に固定されており、
    　前記リード線の第２の端部は、前記カバー部品の外に出ており、
    　前記第１の端部と前記第２の端部との間の前記リード線の前記一部は、前記カバー部品内に設けられており、
    　前記リード線が前記モールド樹脂から前記カバー部品の内部に延在する方向と、前記リード線が前記カバー部品の前記内部から前記カバー部品の前記外に延在する方向とが成す角度をθ１としたとき、θ１＜１３５度を満たすように前記リード線が前記カバー部品によって保持されている
    　電動機。     stator and
    a circuit board;
    a molded resin covering the stator and the circuit board;
    a lead wire connected to the circuit board;
    and a cover part that covers a part of the lead wire,
    A part of the cover component is fixed by the mold resin, and another part of the cover component is exposed outside the mold resin,
    a first end of the lead wire is fixed to the circuit board;
    a second end of the lead wire extends outside the cover component;
    the portion of the lead wire between the first end and the second end is provided within the cover component;
    The angle formed by the direction in which the lead wire extends from the mold resin to the inside of the cover component and the direction in which the lead wire extends from the inside of the cover component to the outside of the cover component is defined as θ1. In the electric motor, the lead wire is held by the cover part so as to satisfy θ1<135 degrees.
  2. 　カバー部品は、
    　前記リード線の前記一部を覆う第１の部品と、
    　前記第１の部品と組み合わされており、前記リード線の前記一部を覆う第２の部品と
    　を有する電動機。     The cover parts are
    a first component that covers the part of the lead wire;
    a second component that is combined with the first component and covers the part of the lead wire.
  3. 　前記第１の部品又は前記第２の部品の少なくとも一方は、前記リード線の前記一部がはめ込まれる溝を有する請求項２に記載の電動機。 The electric motor according to claim 2, wherein at least one of the first component and the second component has a groove into which the part of the lead wire is fitted.
  4. 　前記第１の部品及び前記第２の部品は、互いに係合している請求項２又は３に記載の電動機。 The electric motor according to claim 2 or 3, wherein the first part and the second part are engaged with each other.
  5. 　前記カバー部品は、前記リード線の前記一部が延在する空洞部を有する請求項２から４のいずれか１項に記載の電動機。 The electric motor according to any one of claims 2 to 4, wherein the cover component has a hollow portion through which the part of the lead wire extends.
  6. 　前記リード線は、前記空洞部内で湾曲している請求項５に記載の電動機。 The electric motor according to claim 5, wherein the lead wire is curved within the cavity.
  7. 　前記リード線の前記一部を覆うチューブをさらに備える請求項１から６のいずれか１項に記載の電動機。 The electric motor according to any one of claims 1 to 6, further comprising a tube that covers the part of the lead wire.
  8. 　前記リード線の前記一部を覆うチューブをさらに備え、
    　前記チューブは、前記第１の部品及び前記第２の部品によって挟まれている
    　請求項２から６のいずれか１項に記載の電動機。     further comprising a tube that covers the part of the lead wire,
    The electric motor according to any one of claims 2 to 6, wherein the tube is sandwiched between the first component and the second component.
  9. 　前記カバー部品は、樹脂で作られている請求項１から８のいずれか１項に記載の電動機。 The electric motor according to any one of claims 1 to 8, wherein the cover part is made of resin.
  10. 　室内機と、
    　前記室内機に接続される室外機と
    　を備え、
    　前記室内機、前記室外機、又は前記室内機及び前記室外機の各々は、請求項１から９のいずれか１項に記載の電動機を有する
    　空気調和機。     indoor unit and
    an outdoor unit connected to the indoor unit;
    The indoor unit, the outdoor unit, or each of the indoor unit and the outdoor unit includes the electric motor according to any one of claims 1 to 9. An air conditioner.
PCT/JP2022/022430 2022-06-02 2022-06-02 Electric motor and air conditioner WO2023233609A1 (en)

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WO2022079837A1 (en) * 2020-10-14 2022-04-21 三菱電機株式会社 Electric motor, blower, and air conditioner

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0321954U (en) * 1989-03-07 1991-03-06
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