JP2012050194A - Motor, pump, and pump drive apparatus - Google Patents

Abstract

[PROBLEMS] To provide a motor capable of achieving downsizing by routing a crossover wire of a coil winding part so as not to be provided on an end surface in the axial direction of a yoke part, and a pump using the motor as a drive source and the pump. Get the pump drive equipment.
Coil winding portions 31 are respectively provided on tooth portions 33 projecting from an inner side surface 32a of each yoke portion 32, and a connecting wire 31L of each coil winding portion 31 is connected to an inner side surface 32a of the yoke portion 32. The connecting wire 31L is routed along the inner side surface 32a.
[Selection] Figure 2

Description

  The present invention relates to a motor, a pump using the motor as a drive source, and a pump driving device equipped with the pump.

  Pump driving devices such as dishwashers, hot water supply units, and washing machines are equipped with pumps that use a motor as a drive source, and miniaturization of the motor is one means to achieve miniaturization of these pump driving devices. It becomes.

  Conventionally, as in a motor shown in Patent Document 1, for example, a magnetic pole portion is provided at a tip portion of a tooth portion protruding from a yoke portion, and a coil winding portion is provided at each tooth portion to constitute a stator. Are known.

  At this time, since the driving force of the motor depends on the facing area between the magnetic pole portion and the permanent magnet facing the magnetic pole portion, in Patent Document 1, the height in the rotation axis direction of the tooth portion provided with the coil winding portion is set. It is lower than the height of the magnetic pole part in the same direction. The coil winding portion is arranged so as not to protrude from the yoke portion and the magnetic pole portion. As a result, while maintaining the driving force of the motor, the overall height in the direction of the rotation axis including the yoke portion, the magnetic pole portion, and the coil winding portion is reduced to achieve miniaturization.

JP 2004-328971 A

  By the way, like the said conventional motor, when a stator is comprised by a yoke part, a teeth part, a magnetic pole part, and a coil winding part, the coil winding of another teeth part from the coil winding part of one teeth part When the connecting wire is routed around the section, the connecting wire is generally provided along the end surface of the yoke portion in the rotation axis direction. At this time, a holding projection such as a rib for guiding and connecting the crossover wire is provided on the end surface in the axial direction of the yoke portion, and the crossover wire is hooked on the holding projection.

  For this reason, even when the height of the tooth portion is lowered and the coil winding portion is disposed so as not to protrude from the yoke portion, the connecting wire is provided along the axial end surface of the yoke portion. There was a problem that the holding projections were bulky and it was difficult to reduce the size of the motor.

  Accordingly, the present invention provides a motor capable of achieving downsizing by arranging the crossover of the coil winding portion so as not to be provided on the end surface in the axial direction of the yoke portion, a pump using the motor as a drive source, and It aims at providing the pump drive device carrying a pump.

  In order to solve such a problem, the motor of the present invention has a permanent magnet magnetized in the circumferential direction and rotatable around an output shaft, and an outer peripheral side or inner side of the rotor. A yoke portion disposed on the circumferential side and provided along the circumferential direction of the rotor, a plurality of teeth portions projecting from the yoke portion toward the permanent magnet, and provided at the distal end portion of each tooth portion. And a stator having a coil winding portion wound around each of the teeth portions, and a connecting wire of each coil winding portion is connected to the yoke. It is characterized in that it is provided along the side surface of the portion facing the coil winding portion.

  According to the motor of the present invention, since the connecting wire of the coil winding portion is provided along the side surface facing the coil winding portion of the yoke portion, the connecting wire can be excluded from the axial end surface of the yoke portion. As a result, the axial length of the motor can be shortened, and downsizing can be achieved.

FIG. 1 is a cross-sectional view schematically showing a pump using the motor according to the first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view taken along line II in FIG. FIG. 3 is an enlarged cross-sectional view of a portion II in FIG. 4 is a cross-sectional view taken along line III-III in FIG. FIG. 5 is a perspective view showing the stator shown in FIG. 3 without a coil winding portion. FIG. 6 is a perspective view of the stator shown in FIG. FIG. 7 is a reference perspective view showing a conventional stator. FIG. 8 is a cross-sectional view corresponding to FIG. 3 showing the stator of the motor according to the second embodiment of the present invention. FIG. 9 is a cross-sectional view taken along line IV-IV in FIG. 10 is a cross-sectional view taken along the line VV in FIG. FIG. 11 is a cross-sectional view corresponding to FIG. 3 showing the stator of the motor according to the third embodiment of the present invention. 12 is a cross-sectional view taken along line VI-VI in FIG. 13 is a perspective view of the stator shown in FIG. FIG. 14 is a cross-sectional view corresponding to FIG. 3 showing the stator of the motor according to the fourth embodiment of the present invention. 15 is a cross-sectional view taken along line VII-VII in FIG. 16 is a cross-sectional view taken along line VIII-VIII in FIG. FIG. 17 is a cross-sectional view schematically showing the internal structure of a dishwasher equipped with the pump of the present invention. FIG. 18 is a system diagram schematically showing a hot water supply unit equipped with the pump of the present invention. FIG. 19 is a cross-sectional view schematically showing the internal structure of a washing machine equipped with the pump of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that similar components are included in the following embodiments. Therefore, in the following, common reference numerals are given to those similar components, and redundant description is omitted.

[First Embodiment]
1 to 6 are views showing a first embodiment of the present invention. FIG. 1 shows a pump P, and FIGS. 2 to 6 show a motor M that drives the pump P. FIG.

  As shown in FIG. 1, the pump P includes an impeller 110 that is rotated by the output shaft 11 of the motor M, a pump chamber 120 that houses the impeller 110, and a pump case 121 that forms an outline of the pump chamber 120. Are generally configured.

  On the other hand, as shown in FIGS. 1 and 2, the motor M is generally configured by including a rotor 20 having a permanent magnet 21 and a stator 30 having a coil winding portion 31, and energizes the coil winding portion 31. As a result, the output shaft 11 rotates together with the rotor 20.

  The pump case 121 is formed with a suction port 122 that communicates with the central portion of the pump chamber 120 and a discharge port 123 that communicates with the outer periphery of the pump chamber 120, and is sucked from the suction port 122 by the rotation of the impeller 110. Liquid such as water is discharged from the discharge port 123.

  The motor M is disposed on the side opposite to the suction port 122 with respect to the impeller 110, and the motor M and the pump chamber 120 are partitioned liquid-tightly by the separation plate 130. And the outer peripheral part of the separation plate 130 is liquid-tightly connected to the pump case 121 via a sealing material (not shown).

  In addition, a housing chamber 131 for rotatably housing the rotor 20 having the permanent magnet 21 is recessed in the central portion of the separation plate 130, and the rotor 20 and the stator 30 are liquid-tight by the housing chamber 131. It is partitioned.

  The rotor 20 includes a cylindrical rotor body 22, a permanent magnet 21 that is provided on the outer wall of the rotor body 22 and is multipolarly magnetized in the circumferential direction, and a support plate 23 to which the impeller 110 is attached. In this embodiment, the rotor 20 rotates together with the output shaft 11 that is rotatably supported by a shaft support portion 121 a provided in the pump case 121 and an end plate 131 a of the storage chamber 131. In the present embodiment, the stator 30 is concentrically disposed on the outer peripheral side of the rotor 20, thereby constituting the motor M having an inner rotor structure.

  As shown in FIGS. 3 and 4, the stator 30 includes a yoke portion 32 provided along the circumferential direction of the rotor 20, and a plurality of teeth portions 33 protruding from the yoke portion 32 toward the permanent magnet 21. A magnetic pole portion 34 provided at the tip of each tooth portion 33 and disposed opposite to the magnetized surface 21a of the permanent magnet 21; and a coil winding portion 31 wound around each tooth portion 33. Composed.

  At this time, as shown in FIGS. 4 and 5, the height h <b> 2 between the upper and lower end surfaces 34 a and 34 b along the output shaft 11 of the magnetic pole portion 34 (hereinafter referred to as the axial direction) is the axial direction of the yoke portion 32. Is substantially equal to the height h1 between the upper and lower end surfaces 32b and 32c, and the area of the magnetic pole portion 34 facing the permanent magnet 21 is set large. Thereby, the torque generated between the magnetic pole part 34 and the permanent magnet 21 is increased.

  Further, the height h3 between the upper and lower end surfaces 33a, 33b in the axial direction of the teeth portion 33 is at least the height h1 of the yoke portion 32 and the height h2 of the magnetic pole portion 34 corresponding to the thickness around which the coil winding portion 31 is wound. Is formed smaller. Thereby, as shown in FIG. 6, when the coil winding portion 31 is disposed in the teeth portion 33, the coil winding portion 31 is prevented from protruding in the axial direction from the yoke portion 32 and the magnetic pole portion 34, The motor M is downsized.

  Therefore, the stator 30 is configured such that the yoke portion 32, the tooth portion 33, and the magnetic pole portion 34 excluding the coil winding portion 31 have shapes as shown in FIG. At this time, the yoke part 32, the teeth part 33, and the magnetic pole part 34 are formed by laminating a plurality (for example, 20 to 30 sheets) of thin plate materials made of a soft magnetic material such as iron in the axial direction of the pump P.

  As shown in FIG. 2, the yoke portion 32 is arranged in a polygonal shape along the circumferential direction of the rotor 4, and the tooth portion 33 and the magnetic pole portion 34 are arranged at six locations in the circumferential direction of the inner side surface 32 a of the yoke portion 32. Projecting toward the permanent magnet 21. At this time, in the present embodiment, the overall shape of the yoke portion 32 is a substantially regular hexagonal shape, but is not limited to this shape, and may be formed in a substantially annular shape, for example.

  The magnetic pole portions 34 respectively projecting from the yoke portion 32 are arranged to face each other with a slight gap on the outer periphery of the permanent magnet 21 via the separation plate 130. In the present embodiment, the stator 30 is provided with six magnetic pole portions 34, whereas the permanent magnet 21 has a configuration in which four poles are magnetized in the circumferential direction.

  In addition, the coil winding portion 31 is wound around the teeth portion 33. As shown in FIG. 3, a thin plate made of an insulating material such as a synthetic resin is provided between the teeth portion 33 and the coil winding portion 31. The protective layer 35 is interposed for insulation. At this time, as shown in FIG. 6, the inner side surface 32a and the upper and lower end surfaces 32b and 32c of the yoke portion 32 are continuously covered with the protective layer 35, and the inner side surface 34c of the magnetic pole portion 34 and the upper and lower end surfaces 34a and 34b The circumferential end faces 34d and 34e are also continuously covered by the protective layer 35.

  As shown in FIG. 1, the motor M includes a control board 36, which receives a signal from a position detection sensor (not shown) that detects the rotational position of the rotor 20 and receives the coil winding portion 31. The current that flows through is controlled. Thereby, the control board 36 controls the magnetic field generated in the magnetic pole part 34 according to the rotational position of the rotor 20.

  The stator 30 and the control board 36 existing on the opposite side of the pump chamber 120 with the separation plate 130 as a boundary are entirely covered with the mold resin 40. Thereby, the stator 30 and the control board 36 are integrated with the separation plate 130 and the pump case 121 through the mold resin 40, and the strength of the entire pump P including the motor M is ensured.

  By the way, the coil winding part 31 provided in the teeth part 33 of the stator 30 is provided with a connecting wire 31L that connects the coil winding part 31 and the other coil winding part 31. It is routed between the coil winding portions 31 and wired.

  Here, in the present embodiment, as shown in FIGS. 2 and 3, the crossover wire 31 </ b> L of each coil winding portion 31 is provided on the inner side surface 32 a that is the side surface facing the coil winding portion 31 of the yoke portion 32. Thus, the crossover wire 31L is routed so that unnecessary tension is not generated along the inner side surface 32a.

  As shown in FIG. 3, the inner side surface 32a is provided with a rib 37 as a holding projection for routing and guiding the crossover wire 31L. In this case, the ribs 37 are located on both sides of the coil winding portion 31 and are provided at two locations on the drawing wire side and the take-out side of the connecting wire 31L, and the connecting wire 31L is hooked on the rib 37 to thereby connect the connecting wire 31L. 31L shaking can be suppressed.

  That is, in the conventional coil winding portion 31 ′, as shown in FIG. 7, the crossover wire 31L ′ is guided by the rib 37 ′ provided on the upper end surface 32b ′ of the yoke portion 32 ′, and the upper end surface 32b ′. Is routed along. Reference numeral 34 'denotes a magnetic pole portion. On the other hand, in the coil winding portion 31 of the present embodiment, as shown in FIG. 6, the crossover wire 31 </ b> L is routed and guided to the rib 37 provided on the inner side surface 32 a of the yoke portion 32. Of course, the ribs 37 and 37 'are provided in the vicinity of the coil winding portions 31 and 31' in both the present embodiment and the conventional one.

  With the above configuration, according to the motor M of the first embodiment, the connecting wire 31 </ b> L of the coil winding portion 31 provided on the tooth portion 33 of the stator 30 faces the coil winding portion 31 of the yoke portion 32. 32a is provided along the line 32a. Thereby, since the crossover wire 31L can be excluded from the axial end faces 32b and 32c of the yoke portion 32, the axial length of the motor M can be shortened to achieve miniaturization.

  In this case, a rib 37 is also provided on the inner side surface 32 a of the yoke portion 32 to guide and guide the crossover wire 31 </ b> L in the vicinity of the coil winding portion 31. Thereby, coupled with the provision of the connecting wire 31L along the inner surface 32a, the axial length of the motor M can be further shortened to achieve further miniaturization.

  Furthermore, according to the pump P of the present embodiment, since the motor M described above is used as a drive source, the size of the motor P can be reduced by downsizing the motor M.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to the drawings. 8-10 is the figure which showed the stator of the motor concerning this embodiment.

  The main difference between the present embodiment and the first embodiment is that a partition plate serving as a partition member is provided between the crossover wire 31L and the coil winding portion 31 without the rib 37 and prevents contact between the two. 38 is provided.

  That is, as shown in FIGS. 8 and 9, the partition plate 38 is fitted to the outside of the tooth portion 33 with a distance S corresponding to at least the diameter of the crossover wire 31 </ b> L from the inner surface 32 a of the yoke portion 32. . The partition plate 38 is formed in a thin plate shape by an insulating material such as a synthetic resin, and the outer shape thereof is a rectangular shape along the cross-sectional shape of the teeth portion 33 as shown in FIG. A rectangular opening 38a for concentrating the teeth 33 is formed concentrically at the center of the partition plate 38.

  At this time, as shown in the figure, a slit 38b is formed at an appropriate portion of the peripheral edge of the partition plate 38 to communicate the outer end of the partition plate 38 with the inside of the rectangular opening 38a. The connecting wire 31L of the coil winding portion 31 is drawn or taken out between the partition plate 38 and the inner side surface 32a of the yoke portion 32 through 38b.

  With the above configuration, according to the motor M of the second embodiment, since the partition plate 38 is provided between the crossover wire 31L and the coil winding portion 31, the crossover wire 31L directly contacts the coil winding portion 31. Can be avoided. Accordingly, when the connecting wire 31L is drawn into the coil winding portion 31 along the inner side surface 32a of the yoke portion 32 or pulled out from the coil winding portion 31, the connecting wire 31L is rubbed against the coil winding portion 31 so that both of them are rubbed. It can suppress that it short-circuits or the crossover 31L is disconnected.

  Further, in this embodiment, since the slit 38b is formed in the partition plate 38, when the connecting wire 31L and the coil winding portion 31 are partitioned by the partition plate 38, the connecting wire 31L can be easily pulled in and taken out. Become. At this time, the slit 38b has a function of holding the crossover wire 31L.

  Of course, even in the present embodiment, the connecting wire 31L of each coil winding portion 31 is provided on the inner surface 32a of the yoke portion 32, and the connecting wire 31L is routed along the inner surface 32a. In this case, the motor M can be downsized.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to the drawings. FIGS. 11-13 is the figure which showed the stator of the motor concerning this embodiment.

  The main difference of this embodiment from the first embodiment is that, as shown in FIG. 11, the crossover wire 31 </ b> L of each coil winding portion 31 is a side surface facing the coil winding portion 31 of the magnetic pole portion 34. This is because it is provided on the inner side surface 34c (the reverse side surface opposite to the permanent magnet 21), and the connecting wire 31L is routed along the inner side surface 34c.

  Further, as shown in FIG. 11, the inner side surface 34c is provided with a rib 37A as a holding projection for routing and guiding the crossover wire 31L as in the first embodiment. Even in this case, the rib 37A is located on both sides of the coil winding portion 31, and is provided with two places on the connecting wire 31L on the drawing side and on the extracting side, and the connecting wire 31L is hooked on the rib 37A. As a result, the wobbling of the crossover line 31L can be suppressed. In addition, as shown in FIG. 11, the rib 37 may be provided in the inner surface 32a of the yoke part 32 as needed.

  Also in the present embodiment, as shown in FIG. 12, the height h2 of the magnetic pole portion 34 is substantially equal to the height h1 of the yoke portion 32 in order to ensure a large area of the magnetic pole portion 34. Further, as in the first embodiment, a protective layer 35 is interposed between the tooth portion 33 and the coil winding portion 31, and the inner side surface 32a, upper and lower end surfaces 32b and 32c of the yoke portion 32, and the magnetic pole portion 34. The inner side surface 34c, upper and lower end surfaces 34a, 34b, and circumferential end surfaces 34d, 34e are also continuously covered with the protective layer 35.

  With the above configuration, according to the motor M of the third embodiment, the crossover wire 31 </ b> L of the coil winding portion 31 is provided along the inner side surface 34 c facing the coil winding portion 31 of the magnetic pole portion 34. As a result, the crossover wire 31L can be excluded from the axial end faces 32b, 32c of the yoke portion 32 as in the first embodiment, so that the axial length of the motor M can be shortened and miniaturization can be achieved.

  Even in this case, since the rib 37A for guiding the crossover wire 31L in the vicinity of the coil winding portion 31 is also provided on the inner side surface 34c of the magnetic pole portion 34, the axial length of the motor M is further increased. It can be shortened to achieve further miniaturization.

  Furthermore, by configuring the pump P using the motor M of the present embodiment described above as a drive source, the pump P itself can be reduced in size.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to the drawings. 14-16 is the figure which showed the stator of the motor concerning this embodiment.

  The main difference between the present embodiment and the third embodiment is that a partition plate as a partition member is provided between the crossover wire 31L and the coil winding portion 31 to prevent contact between them without providing the rib 37A. 38A is provided.

  That is, as shown in FIG. 14 and FIG. 15, the partition plate 38 </ b> A is fitted to the outside of the tooth portion 33 with a distance S corresponding to at least the diameter of the connecting wire 31 </ b> L from the inner side surface 34 c of the magnetic pole portion 34. . This partition plate 38A is formed into a thin plate shape by an insulating material such as synthetic resin, and its outer shape is a rectangular shape along the cross-sectional shape of the tooth portion 33 as in the second embodiment, as shown in FIG. ing. A rectangular opening 38a for fitting to the tooth portion 33 is formed concentrically at the center of the partition plate 38A.

  At this time, as shown in the figure, a slit 38b is formed at an appropriate portion of the peripheral edge of the partition plate 38A to communicate the outer end of the partition plate 38A and the inner side of the rectangular opening 38a. The crossover wire 31L of the coil winding portion 31 is drawn or taken out between the partition plate 38A and the inner side surface 34c of the magnetic pole portion 34 through 38b.

  With the above configuration, according to the motor M of the fourth embodiment, since the partition plate 38A is provided between the crossover wire 31L and the coil winding portion 31, the crossover wire 31L directly contacts the coil winding portion 31. Can be avoided. Thereby, when the connecting wire 31L is drawn into the coil winding portion 31 along the inner side surface 34c of the magnetic pole portion 34 or pulled out from the coil winding portion 31, the connecting wire 31L is rubbed against the coil winding portion 31 so that both of them are rubbed. It can suppress that it short-circuits or the crossover 31L is disconnected.

  In the present embodiment, since the slit 38b is formed in the partition plate 38A, when the connecting wire 31L and the coil winding portion 31 are partitioned by the partition plate 38A, the connecting wire 31L can be easily pulled in and taken out. Become. Even in this case, the slit 38b has a function of holding the crossover wire 31L.

  Of course, even in the present embodiment, the connecting wire 31L of each coil winding portion 31 is provided on the inner side surface 34c of the magnetic pole portion 34, and the connecting wire 31L is routed along the inner side surface 34c. In this case, the motor M can be downsized.

[Fifth Embodiment]
5th Embodiment demonstrates the dishwasher as a pump drive device carrying the pump of this invention. FIG. 17 is a diagram illustrating a dishwasher according to the present embodiment.

  In the dishwasher 200, water or hot water is supplied from the water supply port 201 to the water storage tank 202, and the water or hot water supplied to the water storage tank 202 is sent to the nozzle 203 by the cleaning pump P1, and water or The tableware 204 set in the dishwasher 200 is washed by jetting warm water.

  In the present embodiment, the washed water or hot water falls downward and is stored in the water storage tank 202, and is sent again to the nozzle 203 by the cleaning pump P1. Then, after circulating and cleaning for a predetermined time, the water or hot water in the water storage tank 202 is drained by stopping the cleaning pump P1 and operating the drain pump P2.

  Next, after supplying water or warm water from the water supply port 201 to the water storage tank 202 again, rinsing is performed by operating the cleaning pump P1 for a predetermined time, and then the cleaning pump P1 is stopped and the drainage pump P2 is operated. The water or hot water in the water storage tank 202 is drained. The tableware 204 set in the dishwasher 200 is washed by rinsing by repeating the above operation several times.

  Here, in this embodiment, the miniaturized pump P of the first embodiment is used for the washing pump P1 and the drainage pump P2 described above. Thus, the dishwasher 200 of this embodiment can be downsized by configuring the washing pump P1 and the drainage pump P2 using the miniaturized pump P. Further, by effectively utilizing the shape of the pump P that has been thinned using the motor M, it is possible to expand the tableware storage space.

  In this embodiment, any of the motors M shown in the second to fourth embodiments can be used as the motors used for the pumps P1 and P2. Even in this case, the same effect can be obtained. Can be played.

[Sixth Embodiment]
In the sixth embodiment, a hot water supply unit as a pump driving device equipped with the pump of the present invention will be described. FIG. 18 is a view showing a hot water supply unit according to the present embodiment.

  The hot water supply unit 300 will be described by taking as an example a hot water supply system using a heat pump using CO2 as a refrigerant, which can reduce power consumption and is environmentally friendly.

  That is, the hot water supply unit 300 includes a heat pump 301, a hot water storage unit 302, a bath 303, a floor heating 304, a cooking heat exchanger 305, a heating heat exchanger 306, and the like. In addition, the hot water supply unit 300 is provided with a hot water faucet 307 for kitchen and washing and an auxiliary tank 308 for storing hot water, and a pressure reducing valve 310 is provided downstream of the water supply port 309 and a floor heating 304 is provided. A thermal valve 311 is provided. Furthermore, a plurality of mixing valves 312 and safety valves 313 are provided in each pipe.

  The pumps P4, P5, P6, P7, and P8 are driven and the above-described valves 310, 311, 312, and 313 are controlled, so that water is supplied to the bath 303, the hot water faucet 307 for the kitchen and the bathroom, and the like. Hot water can be supplied at a desired temperature and flow rate.

  Here, in this embodiment, the downsized pump P of the first embodiment is used for the above-described pumps P4 to P8. As described above, the hot water supply unit 300 of the present embodiment is configured with the pumps P4 to P8 using the downsized pump P, whereby the hot water supply unit 300 can be reduced in size.

  In addition, in this embodiment, it can apply not only to the hot water supply unit 300 which is the electric hot water supply system using the heat pump mentioned above, but also to a gas hot water supply system and a cogeneration system, The same effect is obtained by using the said pump P. Can be played.

  Moreover, even in this embodiment, any of the motors M shown in the second to fourth embodiments can be used as the motor used for the pumps P4, P5, P6, P7, and P8. Even in this case, the same effect can be obtained.

[Seventh Embodiment]
In the seventh embodiment, a washing machine as a pump drive device equipped with the pump of the present invention will be described. FIG. 19 is a diagram illustrating the washing machine according to the present embodiment.

  In the washing machine 400, the washing tub 401 is rotationally controlled by a motor (not shown), and the laundry tub 401 is rotated, and the water in the washing machine 400 is circulated by the circulation pump P3 to wash clothes and the like. Is called.

  Here, in this embodiment, the miniaturized pump P of the first embodiment is used for the circulation pump P3 described above. As described above, the washing machine 400 according to this embodiment includes the circulation pump P3 using the miniaturized pump P, whereby the washing machine 400 can be reduced in size. In addition, the laundry tub 401 can be enlarged by effectively utilizing the downsized pump shape.

  Even in the present embodiment, any of the motors M shown in the second to fourth embodiments can be used as the motor used in the pump P3. There is an effect.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, in the above embodiment, the pump using an inner rotor structure motor as a drive source has been described as an example. However, the present invention is not limited to this inner rotor structure, and the present invention is applicable to an outer rotor structure motor configuration. The invention can be applied. In this case, the connecting wire of each coil winding part is provided along the outer surface facing the coil winding part of the yoke part.

DESCRIPTION OF SYMBOLS 11 Output shaft 20 Rotor 21 Permanent magnet 30 Stator 31 Coil winding part 31L Crossover 32 York part 32a Inner side surface of yoke part (side surface facing coil winding part)
33 Teeth portion 34 Magnetic pole portion 34c Inner side surface of magnetic pole portion (side surface facing coil winding portion)
37, 37A Rib (holding projection)
38, 38A Partition plate (partition member)
200 Dishwasher (pump drive equipment)
300 Hot water supply unit (pump drive device)
400 Washing machine (pump drive device)
M motor P pump

Claims (6)

A rotor having a permanent magnet magnetized in the circumferential direction and rotatable about the output shaft;
A yoke portion disposed on the outer peripheral side or inner peripheral side of the rotor and provided along the circumferential direction of the rotor, a plurality of tooth portions protruding from the yoke portion toward the permanent magnet, and each of the tooth portions In a motor including a magnetic pole portion provided at a tip portion and disposed opposite to a magnetized surface of the permanent magnet and a coil winding portion wound around each tooth portion,
The motor according to claim 1, wherein the connecting wire of each coil winding portion is provided along a side surface of the yoke portion facing the coil winding portion. A rotor having a permanent magnet magnetized in the circumferential direction and rotatable about the output shaft;
A yoke portion disposed on the outer peripheral side or inner peripheral side of the rotor and provided along the circumferential direction of the rotor, a plurality of tooth portions protruding from the yoke portion toward the permanent magnet, and each of the tooth portions In a motor including a magnetic pole portion provided at a tip portion and disposed opposite to a magnetized surface of the permanent magnet and a coil winding portion wound around each tooth portion,
A motor characterized in that the connecting wire of each coil winding part is provided along a side surface of the magnetic pole part facing the coil winding part.   The motor according to claim 1, wherein a holding projection is provided on the side surface to hold and guide the connecting wire.   The motor according to any one of claims 1 to 3, wherein a partition member is provided between the connecting wire and the coil winding portion to prevent contact between the two.   A pump using the motor according to any one of claims 1 to 4 as a drive source.   6. A pump driving device comprising the pump according to claim 5 mounted thereon.

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