WO2016192345A1 - 洗衣机和用于洗衣机的电机 - Google Patents

洗衣机和用于洗衣机的电机 Download PDF

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Publication number
WO2016192345A1
WO2016192345A1 PCT/CN2015/096314 CN2015096314W WO2016192345A1 WO 2016192345 A1 WO2016192345 A1 WO 2016192345A1 CN 2015096314 W CN2015096314 W CN 2015096314W WO 2016192345 A1 WO2016192345 A1 WO 2016192345A1
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Prior art keywords
stator
washing machine
narrow
wide
motor
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PCT/CN2015/096314
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English (en)
French (fr)
Inventor
王飞
陈金涛
文凯平
张�浩
路星星
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广东威灵电机制造有限公司
美的威灵电机技术（上海）有限公司
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Priority claimed from CN201510293705.1A external-priority patent/CN104967269A/zh
Priority claimed from CN201520368986.8U external-priority patent/CN204633552U/zh
Application filed by 广东威灵电机制造有限公司, 美的威灵电机技术（上海）有限公司 filed Critical 广东威灵电机制造有限公司
Publication of WO2016192345A1 publication Critical patent/WO2016192345A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/04—Asynchronous induction motors for single phase current
    • H02K17/08—Motors with auxiliary phase obtained by externally fed auxiliary windings, e.g. capacitor motors

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  • the present invention relates to the field of electrical appliance manufacturing technology, and in particular to a washing machine and a motor for a washing machine.
  • the pulsator washing machine of the related art has higher cost, larger weight, and less effective internal space.
  • the pulsator washing machine in the related art has a high cost, a large weight, and a small effective space inside.
  • the inventors of the present application have found through a large amount of research and experiments that the above problem is caused by the pulsator in the related art.
  • the washing machine uses a 4-pole single-phase induction motor to drive the washing tub.
  • the synchronous speed of the motor is 1500 rpm, and the speed is reduced to 750-800 rpm by the first-stage speed reduction mechanism.
  • the corresponding output is dehydrated, and the clutch is switched to the washing state to decelerate at the first stage.
  • the second speed reduction mechanism the speed is reduced to 210-260 rpm.
  • the 4-pole single-phase induction motor has a low rotation speed, the output torque is large corresponding to the same output power, and the motor volume is proportional to the motor torque, so the motor volume is large, resulting in higher motor cost. It has a large weight and needs to occupy a large space inside the washing machine.
  • the present invention aims to solve at least one of the above technical problems in the related art to some extent.
  • the present invention proposes a washing machine which has the advantages of low cost, light weight, large internal effective space and the like.
  • the invention also proposes a motor for a washing machine which has the advantages of small volume, low cost, light weight, and capable of increasing the effective space inside the washing machine.
  • an embodiment of a first aspect of the present invention provides a washing machine including: a washing tub; and a motor for driving the tub to rotate about its rotation axis, the motor being 2 poles a single-phase induction motor, and comprising: a stator having a rotor receiving cavity; a rotor disposed in the rotor receiving cavity and magnetically coupled to the stator, wherein an inner diameter of the stator is The ratio of the minimum outer diameter of the stator is no more than 0.49.
  • the washing machine according to the embodiment of the present invention has the advantages of low cost, light weight, large internal effective space, and the like.
  • washing machine may further have the following additional technical features:
  • the rotor is a squirrel-cage rotor and the stator is a 24-slot stator.
  • the stator has a minimum outer diameter of 111-121 mm and a length along its axial direction of 32.5-37.5 mm.
  • a plurality of winding grooves are formed on an inner peripheral wall of the rotor accommodating cavity of the stator.
  • the plurality of winding slots includes a plurality of sets of narrow slots and a plurality of sets of wide slots, wherein each set of narrow slots includes a plurality of narrow slots and each set of wide slots includes a plurality of wide slots, each set of wide slots and
  • the sets of narrow grooves are alternately arranged along the circumferential direction of the inner peripheral wall of the stator.
  • the narrow groove and the wide groove have the same depth along a radial direction of the stator, and a width of the wide groove along a circumferential direction of the stator is larger than the narrow The width of the groove along the circumferential direction of the stator.
  • a ratio of a cross-sectional area of the wide groove along an axial direction perpendicular to the stator to a cross-sectional area of the narrow groove along an axial direction perpendicular to the stator is not less than 1.36 :1.
  • a central angle of the adjacent narrow slots of each of the narrow slots along a radial central axis of the stator is less than or equal to 14°, and each of the sets of wide slots is adjacent a central angle of the wide groove along a radial central axis of the stator is greater than or equal to 17°, adjacent to a central angle of the narrow groove and the wide groove along a radial central axis of the stator It is 14°-16°.
  • the narrow slots are 4 sets and the set of narrow slots comprises 4 narrow slots
  • the wide slots are 4 sets and the set of wide slots comprises 2 wide slots.
  • one of the main phase winding and the sub-phase winding is wound in the narrow slot, and one or two of the main phase winding and the sub-phase winding are wound in the wide slot. Phase winding.
  • the washing machine is a pulsator washing machine.
  • An embodiment of a second aspect of the present invention provides a motor for a washing machine, the motor being a 2-pole single-phase induction motor, and comprising: a stator having a rotor receiving cavity; a rotor, the rotor being disposed at The rotor housing cavity is magnetically coupled to the stator, wherein a ratio of an inner diameter of the stator to a minimum outer diameter of the stator is no greater than 0.49:1.
  • the motor for a washing machine has the advantages of small size, low cost, light weight, and capable of increasing the effective space inside the washing machine.
  • FIG. 1 is a schematic structural view of a motor of a washing machine in accordance with an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a stator of a motor of a washing machine in accordance with an embodiment of the present invention.
  • motor 1 stator 10
  • rotor accommodating chamber 11 narrow groove 12
  • wide groove 13 rotor 20.
  • the present invention is based on the discovery of the following facts and problems by the inventors of the present application:
  • the pulsator washing machine in the related art has a high cost, a large weight, and a small effective space inside.
  • the inventors of the present application have found through a large amount of research and experiments that the above problem is caused by the pulsator in the related art.
  • the washing machine uses a 4-pole single-phase induction motor to drive the washing tub.
  • the synchronous speed of the motor is about 1500 rpm, and the speed is reduced to 750-800 rpm by the first-stage speed reduction mechanism.
  • the corresponding output is dehydrated, and the clutch is switched to the washing state.
  • the second stage is decelerated to about 210-260 rpm.
  • the 4-pole single-phase induction motor has a low rotation speed, the output torque is large corresponding to the same output power, and the motor volume is proportional to the motor torque, so the motor volume is large, resulting in higher motor cost. It has a large weight and needs to occupy a large space inside the washing machine.
  • a washing machine As shown in FIGS. 1 and 2, a washing machine according to an embodiment of the present invention includes a washing tub (not shown) and a motor 1.
  • the motor 1 is used to drive the tub to rotate about its axis of rotation, the axis of rotation of the tub being oriented in a vertical direction, which is based on the vertical direction of the washing machine in normal use.
  • the motor 1 is a 2-pole single-phase induction motor, and specifically, the motor 1 includes a stator 10 and a rotor 20.
  • the stator 10 has a rotor housing chamber 11.
  • the rotor 20 is disposed within the rotor housing cavity 11 and is magnetically coupled to the stator 10.
  • the ratio of the inner diameter ID of the stator 10 to the minimum outer diameter OD of the stator 10 is not more than 0.49, that is, ID: OD ⁇ 0.49:1.
  • the motor 1 for driving the washing tub adopts a 2-pole single-phase induction motor, and the synchronous rotation speed is increased to about 3000 rpm, and the rated rotation speed is 1900-2700 rpm, correspondingly reducing the reduction ratio of the primary reduction mechanism.
  • the output torque of the motor 1 is reduced by about half at the same output power, thereby reducing the volume of the motor 1 by about 20%.
  • the weight and cost of the motor 1 are reduced, thereby reducing the weight and cost of the washing machine, and increasing the internal effective space of the washing machine.
  • the ratio of the inner diameter ID to the minimum outer diameter OD of the stator 10 of the motor 1 is less than or equal to 0.49, and the ratio of the stator core and the winding is optimally obtained under the same axial length of the stator core.
  • the cost is the lowest. If the ratio is greater than 0.49, although the slot area is enough to put more windings, the stator core yoke will be reduced, which will increase the saturation of the magnetic circuit. If the performance is guaranteed, the axial length of the stator core needs to be increased. This will increase the cost of the stator core and increase the amount of windings.
  • the washing machine according to the embodiment of the present invention has the advantages of low cost, light weight, large internal effective space, and the like.
  • a washing machine in accordance with an embodiment of the present invention includes a washing tub and a motor 1.
  • the washing machine is a pulsator washing machine.
  • the rotor 20 is a squirrel-cage rotor
  • the stator 10 is a 24-slot stator.
  • a 24-slot stator is used, and the winding scheme can realize concentric windings with pitches of 5 slots, 7 slots, 9 slots and 11 slots.
  • the winding has a small harmonic content and is advantageous for vibration noise, and the pitch is 7
  • the amount of windings will be reduced.
  • the stator 10 has an inner diameter ID of 55-57 mm, the stator 10 has a minimum outer diameter OD of 111-121 mm, and the stator 10 has a length in the axial direction of 32.5-37.5 mm.
  • the inner diameter ID of the stator 10 is 56 mm, the minimum outer diameter OD of the stator 10 is 120 mm, and the length of the stator 10 in the axial direction thereof is 35 mm.
  • the inner diameter, the outer diameter and the axial length range can make the stator core amount and the winding amount ratio optimal, and the motor 1 has the smallest volume and the lowest cost.
  • the outer contour of the stator 10 is circular, and a plurality of winding grooves are formed on an inner peripheral wall of the rotor accommodating cavity 11 of the stator 10, the plurality of The winding groove includes a plurality of sets of narrow grooves 12 and a plurality of sets of wide grooves 13.
  • Each set of narrow slots 12 includes a plurality of narrow slots 12 and each set of wide slots 13 includes a plurality of wide slots 13, the narrow slots 12 and the wide slots 13 having the same depth along the radial direction of the stator 10, and the wide slots 13 along the stator
  • the width of the circumferential direction of 10 is greater than the width of the narrow groove 12 along the circumferential direction of the stator 10.
  • Each set of wide grooves 13 and each set of narrow grooves 12 are alternately arranged along the circumferential direction of the inner peripheral wall of the stator 10.
  • the narrow slot 12 is surrounded by a phase winding of the main phase winding and the secondary phase winding, and the wide slot 13 is wound with one phase or two phase windings of the main phase winding and the secondary phase winding.
  • the cross-sectional area of the wide groove 13 along the axial direction perpendicular to the stator 10 can be made larger than the width of the narrow groove 12 in the axial direction perpendicular to the stator 10 while ensuring the radial thickness of the yoke portion of the stator 10.
  • the cross-sectional area thereby not only facilitating the number of winding turns placed in the wide groove 13 more than the number of winding turns placed in the narrow groove 12, but also avoids saturation of the magnetic field and affects the magnetic circuit.
  • the ratio of the cross-sectional area of the wide groove 13 along the axial direction perpendicular to the stator 10 to the cross-sectional area of the narrow groove 12 along the axial direction perpendicular to the stator 10 is not less than 1.36:1.
  • the number of turns in each winding slot is different, thereby making it possible to have a larger number of winding grooves with a larger number of turns and a winding with fewer turns.
  • the trough has a smaller trough area.
  • the central angle ⁇ of the adjacent narrow slots 12 of each of the narrow slots 12 along the radial central axis of the stator 10 is less than or equal to 14°, and the radial direction of the adjacent wide slots 13 of each set of wide slots 13 along the stator 10
  • the central angle ⁇ of the central axis is greater than or equal to 17°, and the central angle ⁇ of the adjacent narrow groove and the wide groove along the radial central axis of the stator 10 is 14°-16°, preferably, each set is narrow
  • the central angle ⁇ of the adjacent narrow grooves 12 in the groove 12 along the radial central axis of the stator 10 is 14°, and the central axis of the adjacent wide grooves 13 of each of the wide grooves 13 along the radial direction of the stator 10
  • the central angle ⁇ is 17°, and the central angle ⁇ of the adjacent narrow groove and the wide groove along the radial center axis of the stator 10 is 15.5°.
  • the narrow slots 12 are four sets and each set of narrow slots 12 includes four narrow slots 12.
  • the wide slots 13 are 4 sets and each set of wide slots 13 includes 2 wide slots 13.
  • the narrow slots 12 are 16 and every 4 narrow slots 12 are continuously arranged along the circumferential direction of the stator 10, the wide slots 13 are 8 and each 2 wide slots 13 are along the stator 10.
  • the circumferential direction is continuously arranged, that is, the arrangement of the narrow groove 12 and the wide groove 13 in the circumferential direction of the stator 10 is 4 narrow grooves 12, 2 wide grooves 13, 4 narrow grooves 12, 2 wide grooves 13, 4 The narrow groove 12, the two wide grooves 13, the four narrow grooves 12, and the two wide grooves 13.
  • the motor 1 is a 2-pole single-phase induction motor, specifically including a stator 10 and a rotor 20.
  • the stator 10 has a rotor housing chamber 11.
  • the rotor 20 is disposed within the rotor housing cavity 11 and is magnetically coupled to the stator 10.
  • the ratio of the inner diameter ID of the stator 10 to the minimum outer diameter OD of the stator 10 is not more than 0.49:1.
  • the motor 1 for a washing machine has the advantages of low cost, light weight, small size, and an increase in the effective space inside the washing machine.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” and “second” may include one or more of the features either explicitly or implicitly.
  • the meaning of "a plurality” is at least two, such as two, three, etc., unless specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed” and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements.
  • installation can be understood on a case-by-case basis.
  • the first feature "on” or “under” the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them.
  • the first feature "above”, “above” and “above” the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature includes the first feature directly below and below the second feature, or merely the first feature level being less than the second feature.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

一种洗衣机和用于洗衣机的电机(1)，所述洗衣机包括：洗衣桶；以及用于驱动所述洗衣桶绕其旋转轴线转动的电机(1)，所述电机(1)为2极单相感应电机，且包括：定子(10)，所述定子(10)具有转子容纳腔(11)；转子(20)，所述转子(20)设置在所述转子容纳腔(11)内并与所述定子(10)磁耦合，其中，所述定子(10)的内直径与所述定子(10)的最小外直径的比值不大于0.49。

Description

洗衣机和用于洗衣机的电机 技术领域
本发明涉及电器制造技术领域，具体而言，涉及一种洗衣机和用于洗衣机的电机。
背景技术
相关技术中的波轮洗衣机，成本较高，重量较大，且内部的有效空间较小。
发明内容
本发明是基于本申请的发明人对以下事实和问题的发现作出的：
相关技术中的波轮洗衣机，成本较高，重量较大，且内部的有效空间较小，本申请的发明人通过大量的研究和实验发现，导致上述问题的原因在于，相关技术中的波轮洗衣机采用4极单相感应电机驱动洗衣桶，该电机的同步转速为1500rpm，经一级减速机构减速到750-800rpm左右，其对应输出为脱水状态，通过离合器切换到洗涤状态，在一级减速的基础上再经二级减速机构减速到210-260rpm左右。由于4极单相感应电机的转速较低，对应相同的输出功率，其输出转矩就要较大，而电机体积与电机转矩成正比，因此电机体积会较大，从而导致电机成本较高、重量较大，且需要占用洗衣机内部较大的空间。
本发明旨在至少在一定程度上解决相关技术中的上述技术问题之一。为此，本发明提出一种洗衣机，该洗衣机具有成本低、重量轻、内部有效空间较大等优点。
本发明还提出一种具有体积小、成本低、重量轻、能够增大洗衣机内部有效空间等优点的用于洗衣机的电机。
为实现上述目的，根据本发明的第一方面的实施例提出一种洗衣机，所述洗衣机包括：洗衣桶；以及用于驱动所述洗衣桶绕其旋转轴线转动的电机，所述电机为2极单相感应电机，且包括：定子，所述定子具有转子容纳腔；转子，所述转子设置在所述转子容纳腔内并与所述定子磁耦合，其中，所述定子的内直径与所述定子的最小外直径的比值不大于0.49。
根据本发明实施例的洗衣机具有成本低、重量轻、内部有效空间较大等优点。
另外，根据本发明上述实施例的洗衣机还可以具有如下附加的技术特征：
根据本发明的一个实施例，所述转子为鼠笼转子，所述定子为24槽定子。
根据本发明的一个实施例，所述定子的最小外直径为111-121毫米、沿其轴向方向的长度为32.5-37.5毫米。
根据本发明的一个实施例，所述定子的转子容纳腔的内周壁上形成有多个绕线槽，所 述多个绕线槽包括多组窄槽和多组宽槽，其中，所述每组窄槽包括多个窄槽且所述每组宽槽包括多个宽槽，所述每组宽槽和所述每组窄槽沿所述定子的内周壁的周向交替设置。
根据本发明的一个实施例，所述窄槽和所述宽槽沿着所述定子的径向方向的深度相同，且所述宽槽沿着所述定子的周向方向的宽度大于所述窄槽沿着所述定子的周向方向的宽度。
根据本发明的一个实施例，所述宽槽沿着垂直于所述定子的轴向的横截面面积与所述窄槽沿着垂直于所述定子的轴向的横截面面积之比不小于1.36:1。
根据本发明的一个实施例，所述每组窄槽中相邻所述窄槽的沿着所述定子的径向的中心轴线的圆心角小于等于14°，所述每组宽槽中相邻所述宽槽的沿着所述定子的径向的中心轴线的圆心角大于等于17°，相邻所述窄槽和所述宽槽的沿着所述定子的径向的中心轴线的圆心角为14°-16°。
根据本发明的一个实施例，所述窄槽为4组且所述每组窄槽包括4个窄槽，所述宽槽为4组且所述每组宽槽包括2个宽槽。
根据本发明的一个实施例，所述窄槽内绕置有主相绕组和副相绕组中的一相绕组，所述宽槽内绕置有主相绕组和副相绕组中的一相或两相绕组。
根据本发明的一个实施例，所述洗衣机为波轮洗衣机。
根据本发明的第二方面的实施例提出一种用于洗衣机的电机，所述电机为2极单相感应电机，且包括：定子，所述定子具有转子容纳腔；转子，所述转子设置在所述转子容纳腔内并与所述定子磁耦合，其中，所述定子的内直径与所述定子的最小外直径的比值不大于0.49:1。
根据本发明实施例的用于洗衣机的电机具有体积小、成本低、重量轻、能够增大洗衣机内部有效空间等优点
附图说明
图1是根据本发明实施例的洗衣机的电机的结构示意图。
图2是根据本发明实施例的洗衣机的电机的定子的结构示意图。
附图标记：电机1、定子10、转子容纳腔11、窄槽12、宽槽13、转子20。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。
首先，本发明是基于本申请的发明人对以下事实和问题的发现作出的：
相关技术中的波轮洗衣机，成本较高，重量较大，且内部的有效空间较小，本申请的发明人通过大量的研究和实验发现，导致上述问题的原因在于，相关技术中的波轮洗衣机采用4极单相感应电机驱动洗衣桶，该电机的同步转速为1500rpm左右，经一级减速机构减速到750-800rpm左右，其对应输出为脱水状态，通过离合器切换到洗涤状态，在一级减速的基础上再经二级减速到210-260rpm左右。由于4极单相感应电机的转速较低，对应相同的输出功率，其输出转矩就要较大，而电机体积与电机转矩成正比，因此电机体积会较大，从而导致电机成本较高、重量较大，且需要占用洗衣机内部较大的空间。
下面参考附图描述根据本发明实施例的洗衣机。
如图1和图2所示，根据本发明实施例的洗衣机包括洗衣桶(图中未示出)和电机1。
电机1用于驱动所述洗衣桶绕其旋转轴线转动，所述洗衣桶的旋转轴线沿竖直方向定向，所述竖直方向以洗衣机正常使用时的竖直方向为准。电机1为2极单相感应电机，具体地，电机1包括定子10和转子20。定子10具有转子容纳腔11。转子20设置在转子容纳腔11内并与定子10磁耦合。其中，定子10的内直径ID与定子10的最小外直径OD的比值不大于0.49，即ID：OD≤0.49：1。
根据本发明实施例的洗衣机，用于驱动所述洗衣桶的电机1采用2极单相感应电机，其同步转速提高到3000rpm左右，额定转速为1900-2700rpm，相应将一级减速机构的减速比从1.72左右增大至2.5-3.5，经一级减速机构减速到750-800rpm左右，其对应输出为脱水状态，通过离合器切换到洗涤状态，其在一级减速的基础上再经二级减速机构减速到210-260rpm左右。
由于电机1相比相关技术中洗衣机的电机的转速提高了一倍左右，在相同输出功率下，电机1的输出转矩减小了一半左右，由此可以减小电机1体积约20％左右，减小电机1的重量和成本，从而减小洗衣机的重量和成本，增大洗衣机的内部有效空间。
并且，电机1的定子10，其内直径ID与最小外直径OD的比值小于或等于0.49，采用该比例可以使得在相同的定子铁芯轴向长度下，定子铁芯和绕组的用量比例最佳，成本最低，若该比值大于0.49，虽然槽面积足够放入更多的绕组，但是定子铁芯轭部会减小，会增加磁路饱和程度，若保证性能，则需增加定子铁芯轴向长度，这样就会增加定子铁芯成本，绕组用量也会增加。
因此，根据本发明实施例的洗衣机具有成本低、重量轻、内部有效空间较大等优点。
下面参考附图描述根据本发明具体实施例的洗衣机。
在本发明的一些具体实施例中，如图1和图2所示，根据本发明实施例的洗衣机包括洗衣桶和电机1。具体而言，所述洗衣机为波轮洗衣机。
其中，转子20为鼠笼转子，定子10为24槽定子。对于2极电机，采用24槽定子，绕组方案可以实现节距为5槽、7槽、9槽和11槽的同心式绕组，该绕组谐波含量小，对振动噪声有利，此外节距为7槽、9槽、11槽的同心式绕组，绕组用量会有所降低。
可选地，定子10的内直径ID为55-57毫米，定子10的最小外直径OD为111-121毫米，定子10的沿其轴向方向的长度为32.5-37.5毫米。优选地，定子10的内直径ID为56毫米，定子10的最小外直径OD为120毫米，定子10的沿其轴向方向的长度为35毫米。该内直径、外直径以及轴向长度范围可以使得定子铁芯用量和绕组用量比例最佳，保证电机1体积最小、成本最低。
在本发明的一些具体示例中，如图1和图2所示，定子10的外轮廓为圆形，定子10的转子容纳腔11的内周壁上形成有多个绕线槽，所述多个绕线槽包括多组窄槽12和多组宽槽13。每组窄槽12包括多个窄槽12且每组宽槽13包括多个宽槽13，窄槽12和宽槽13沿着定子10的径向方向的深度相同，且宽槽13沿着定子10的周向方向的宽度大于窄槽12沿着定子10的周向方向的宽度。每组宽槽13和每组窄槽12沿定子10的内周壁的周向交替设置。其中，窄槽12内绕置有主相绕组和副相绕组中的一相绕组，宽槽13内绕置有主相绕组和副相绕组中的一相或两相绕组。
由此可以在保证定子10的轭部的径向厚度的情况下，使宽槽13沿着垂直于定子10的轴向的横截面面积大于窄槽12沿着垂直于定子10的轴向的横截面面积，由此不仅可以便于宽槽13中放置的绕组匝数多于窄槽12中放置的绕组匝数，而且可以避免磁场饱和而影响磁路。
可选地，宽槽13沿着垂直于定子10的轴向的横截面面积与窄槽12沿着垂直于定子10的轴向的横截面面积之比不小于1.36:1。对于同心式正弦绕组，每个绕线槽内的绕组匝数不同，由此可以使装有匝数较多的绕线槽具有较大的槽面积，且使装有匝数较少的绕线槽具有较小的槽面积。
每组窄槽12中相邻窄槽12的沿着定子10的径向的中心轴线的圆心角α小于等于14°，每组宽槽13中相邻宽槽13的沿着定子10的径向的中心轴线的圆心角γ大于等于17°，相邻所述窄槽和所述宽槽的沿着定子10的径向的中心轴线的圆心角β为14°-16°优选地，每组窄槽12中相邻窄槽12的沿着定子10的径向的中心轴线的圆心角α为14°，每组宽槽13中相邻宽槽13的沿着定子10的径向的中心轴线的圆心角γ为17°，相邻所述窄槽和所述宽槽的沿着定子10的径向的中心轴线的圆心角β为15.5°。
在本发明的一些具体实施例中，如图1和图2所示，窄槽12为4组且每组窄槽12包括4个窄槽12。宽槽13为4组且每组宽槽13包括2个宽槽13。换言之，窄槽12为16个且每4个窄槽12沿定子10的周向连续排列，宽槽13为8个且每2个宽槽13沿定子10的 周向连续排列，即窄槽12和宽槽13在定子10的周向上的排列方式依次为4个窄槽12、2个宽槽13、4个窄槽12、2个宽槽13、4个窄槽12、2个宽槽13、4个窄槽12、2个宽槽13。
根据本发明实施例的洗衣机的其他构成以及操作对于本领域普通技术人员而言都是已知的，这里不再详细描述。
下面参考附图描述根据本发明实施例的用于洗衣机的电机1。
如图1和图2所示，根据本发明实施例的电机1为2极单相感应电机，具体包括定子10和转子20。
定子10具有转子容纳腔11。转子20设置在转子容纳腔11内并与定子10磁耦合。其中，定子10的内直径ID与定子10的最小外直径OD的比值不大于0.49:1。
根据本发明实施例的用于洗衣机的电机1具有成本低、重量轻、体积小、能够增大洗衣机内部有效空间等优点
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。此外，本领域的技术人员可以将本说明书中描述的不同实施例或示例进行接合和组合。
尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (11)

  1. 一种洗衣机，其特征在于，包括：
    洗衣桶；以及
    用于驱动所述洗衣桶绕其旋转轴线转动的电机，所述电机为2极单相感应电机，且包括：
    定子，所述定子具有转子容纳腔；
    转子，所述转子设置在所述转子容纳腔内并与所述定子磁耦合，其中，所述定子的内直径与所述定子的最小外直径的比值不大于0.49。
  2. 根据权利要求1所述的洗衣机，其特征在于，所述转子为鼠笼转子，所述定子为24槽定子。
  3. 根据权利要求1所述的洗衣机，其特征在于，所述定子的最小外直径为111-121毫米、沿其轴向方向的长度为32.5-37.5毫米。
  4. 根据权利要求1所述的洗衣机，其特征在于，所述定子的转子容纳腔的内周壁上形成有多个绕线槽，所述多个绕线槽包括多组窄槽和多组宽槽，其中，所述每组窄槽包括多个窄槽且所述每组宽槽包括多个宽槽，所述每组宽槽和所述每组窄槽沿所述定子的内周壁的周向交替设置。
  5. 根据权利要求4所述的洗衣机，其特征在于，所述窄槽和所述宽槽沿着所述定子的径向方向的深度相同，且所述宽槽沿着所述定子的周向方向的宽度大于所述窄槽沿着所述定子的周向方向的宽度。
  6. 根据权利要求4所述的洗衣机，其特征在于，所述宽槽沿着垂直于所述定子的轴向的横截面面积与所述窄槽沿着垂直于所述定子的轴向的横截面面积之比不小于1.36:1。
  7. 根据权利要求4所述的洗衣机，其特征在于，所述每组窄槽中相邻所述窄槽的沿着所述定子的径向的中心轴线的圆心角小于等于14°，所述每组宽槽中相邻所述宽槽的沿着所述定子的径向的中心轴线的圆心角大于等于17°，相邻所述窄槽和所述宽槽的沿着所述定子的径向的中心轴线的圆心角为14°-16°。
  8. 根据权利要求4所述的洗衣机，其特征在于，所述窄槽为4组且所述每组窄槽包括4个窄槽，所述宽槽为4组且所述每组宽槽包括2个宽槽。
  9. 根据权利要求4所述的洗衣机，其特征在于，所述窄槽内绕置有主相绕组和副相绕组中的一相绕组，所述宽槽内绕置有主相绕组和副相绕组中的一相或两相绕组。
  10. 根据权利要求1-9中任一项所述的洗衣机，其特征在于，所述洗衣机为波轮洗衣 机。
  11. 一种用于洗衣机的电机，其特征在于，所述电机为2极单相感应电机，且包括：
    定子，所述定子具有转子容纳腔；
    转子，所述转子设置在所述转子容纳腔内并与所述定子磁耦合，其中，所述定子的内直径与所述定子的最小外直径的比值不大于0.49:1。
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