JP2011193574A - Motor, pump having the motor as drive source, and water heater, dishwasher and washing machine each equipped with the pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor capable of suppressing interference of magnetic lines of force from a pair of stators, a pump having the motor as a drive source, and a water heater, a dishwasher and a washing machine each equipped with the pump. <P>SOLUTION: A rotor 4 comprises first and second annular sections 41, 46 with magnets 42, 47 disposed in a circumferential direction, and a non-magnetic body (non-magnetic region) 70 formed between the first annular portion 41 and the second annular portion 46. With this configuration, the magnetic lines of force from the pair of stators 5 can be prevented from being interfered to each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a motor, a pump using the motor as a drive source, a hot water supply device equipped with the pump, a dishwasher, and a washing machine.

  Conventionally, by arranging the annular portion (magnet) of the rotor between the pole teeth of the pair of stators arranged on the inside and outside, the rotational driving force from the pair of stators is transmitted to the rotor and the motor A device with improved driving force (higher torque) is known (see, for example, Patent Document 1).

JP-A-11-285228

  However, in the above prior art, since the magnetic lines of force from the pair of stators flow so as to sandwich the annular portion of the rotor, the magnetic lines of force from each stator may interfere with each other.

  With such a configuration, there is a problem that the motor efficiency is lowered or the annular portion must be formed thick so that the magnetic field lines do not interfere with each other.

  Therefore, the present invention provides a motor capable of suppressing interference of magnetic lines of force from a pair of stators, a pump using the motor as a drive source, a hot water supply device equipped with the pump, a dishwasher, and a washing machine. With the goal.

  In order to solve this problem, in the present invention, a first annular portion in which a magnet is arranged in the circumferential direction, and a second annular portion that is provided outside the first annular portion and in which the magnet is arranged in the circumferential direction. A rotatable rotor having an annular portion, a first stator having a coil wound around a stator core having pole teeth for transmitting rotational driving force to the first annular portion, and the second annular portion. A second stator in which a coil is wound around a stator core having pole teeth for transmitting rotational driving force, and a nonmagnetic region is provided between the first annular portion and the second annular portion. It is characterized by.

  According to the present invention, the rotor is constituted by the first and second annular portions in which the magnets are arranged in the circumferential direction, and the nonmagnetic region is provided between the first annular portion and the second annular portion. It can suppress that the magnetic force line from a stator interferes.

It is sectional drawing which showed the pump concerning 1st Embodiment of this invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a disassembled perspective view of the stator core in the 1st stator shown in FIG. It is sectional drawing which showed the pump concerning 2nd Embodiment of this invention. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG. FIG. 7 is an explanatory view showing a schematic development view of the pole teeth shown in FIGS. 5 and 6 and a torque ripple characteristic diagram of a portion corresponding to the development view. It is the figure which showed the 1st modification of the motor concerning 2nd Embodiment of this invention. FIG. 10 is an explanatory view showing a schematic development view of the pole teeth shown in FIG. 9 and a torque ripple characteristic diagram of a portion corresponding to the development view. It is the figure which showed the 2nd modification of the motor concerning 2nd Embodiment of this invention, Comprising: It is explanatory drawing which shows along with the typical expanded view of a magnet, and the torque ripple characteristic figure of the site | part corresponding to it. It is the figure which showed typically the 3rd modification of the motor concerning 2nd Embodiment of this invention, (a) is the figure seen from the inlet port side of a pump, (b) is sectional drawing of (a). is there. It is the figure which showed typically the 4th modification of the motor concerning 2nd Embodiment of this invention, (a) is the figure seen from the inlet side of a pump, (b) is sectional drawing of (a). is there. It is sectional drawing which showed the pump concerning 3rd Embodiment of this invention. It is EE sectional drawing of FIG. It is FF sectional drawing of FIG. It is a schematic diagram which shows the internal structure of the dishwasher which mounts the pump of this invention. It is a circuit diagram of the hot water supply unit carrying the pump of this invention. It is a schematic diagram which shows the internal structure of the washing machine carrying the pump of this invention. It is sectional drawing which showed the 1st modification of the pump concerning 2nd Embodiment of this invention. It is sectional drawing which showed the 2nd modification of the pump concerning 2nd Embodiment of this 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 4 are views showing a pump according to a first embodiment of the present invention. First, the schematic configuration of the pump of the present embodiment will be described with reference to FIG.

  As shown in FIG. 1, the pump P of the present embodiment is a pump P having a motor M as a drive source, and includes a pump case 1, a separation plate 2, an impeller 3, a rotor 4, a stator 5, And a control board 6.

  The pump case 1 and the separation plate 2 are coupled to each other, and form a pump chamber 7 as a pair. A sealing member (not shown) is interposed at the joint between the pump case 1 and the separation plate 2 from the viewpoint of ensuring the water tightness of the pump chamber 7. In the pump chamber 7, the impeller 3 and the rotor 4 are rotatably accommodated in an integrated state.

  The pump case 1 forms a pump chamber 7 together with the separation plate 2, and includes a case main body 11 that defines the pump chamber 7, a suction port 12, and a discharge port 13. The suction port 12 is opened at the center of the top surface of the case body 11 and functions as an opening for sucking liquid into the pump chamber 7. On the other hand, the discharge port 13 is provided on the side wall of the case body 11 and functions as an opening for discharging the liquid in the pump chamber 7.

  The separation plate 2 forms a pump chamber 7 together with the pump case 1 and has a function of separating the rotor 4 and the stator 5 into a watertight state.

  The impeller 3 is integrally attached to the rotor 4 and rotates together with the rotor 4. As the impeller 3 rotates, the impeller 3 sucks liquid from the suction port 12 into the pump chamber 7 and applies centrifugal force to the sucked liquid and discharges it from the discharge port 13 to the outside of the pump P.

  The rotor 4 is formed as a cylindrical body, and rotates the impeller 3. The rotor 4 of the present embodiment includes a first annular portion 41 in which a magnet 42 is disposed in the circumferential direction, and a second annular portion in which a magnet 47 is disposed in the circumferential direction provided outside the first annular portion 41. It is comprised by the part 46 and the support plate 45 to which the impeller 3 is attached. In the present embodiment, the rotor 4 rotates together with the shaft portion 48 that is rotatably supported by the shaft support portion 44 provided in the pump case 1 and the disc portion 21 of the separation plate 2. A gap (clearance) is secured between the magnets 42 and 47 and the separation plate 2 so as not to contact when the rotor 4 rotates.

  The stator 5 includes a stator core 9 having claw magnetic poles (pole teeth) 8 that transmit rotational driving force to the magnets 42 and 47 of the rotor 4, and an annular coil 10 wound around the stator core 9. Here, in the motor M of the present embodiment, details will be described later, but the stator 5 rotates to the first stator 5 </ b> A that transmits the rotational driving force to the first annular portion 41 of the rotor 4 and the second annular portion 46. A second stator 5B for transmitting a driving force, and the rotational driving force from the pair of stators 5 can be transmitted to the rotor 4 so that the driving force of the motor M can be improved (high torque). It has become.

  The control board 6 receives a signal from a position detection sensor (not shown) that detects the rotational position of the rotor 4 and controls the current that flows through the annular coil 10. Thereby, the control board 6 controls the magnetic field generated by the annular coil 10 according to the rotational position of the rotor 4. The back surface side including the control substrate 6, specifically, the entire portion excluding the pump case 1 is covered with the mold resin 15. That is, in this pump P, the separation plate 2, the stator 5, and the control board 6 are covered with the mold resin 15, thereby ensuring strength.

  In the pump P configured as described above, the annular coil 10 is energized by the control board 6, and the magnetic field generated by energization of the annular coil 10 is transmitted from the claw magnetic pole 8 of the stator 5 to the magnets 42 and 47 of the rotor 4. Then, the magnets 42 and 47 are attracted and repelled, whereby the impeller 3 provided integrally with the rotor 4 rotates together with the shaft portion 48. Then, a pump action occurs with the rotation of the impeller 3, and the liquid is sucked into the pump chamber 7 from the suction port 12, and centrifugal force is applied by the impeller 3 from the discharge hole 13 to the outside of the pump P. Discharged.

  Next, the motor M, which is a characteristic part of the present embodiment, will be described in detail with reference to FIGS.

  As described above, the motor M of the present embodiment includes the rotatable rotor 4 having the first annular portion 41 and the second annular portion 46, and the first rotational force transmitted to the first annular portion 41. The stator 5A and the second stator 5B that transmits the rotational driving force to the second annular portion 46 are mainly configured.

  Here, in the present embodiment, a nonmagnetic body 70 as a nonmagnetic region is provided between the first annular portion 41 and the second annular portion 46 of the rotor 4, and the first annular portion 41 has a first inner portion. By disposing the stator 5A and disposing the second stator 5B outside the second annular portion 46, the lines of magnetic force generated from the pair of stators 5 can be suppressed from interfering with each other.

  Specifically, the magnet 42 of the first annular portion 41 has a plurality of N poles and S poles (in this embodiment, four poles each having an eight pole structure), and the phase of the magnetic poles is between the magnets 42. They are arranged 45 degrees apart along the direction. The first stator 5 </ b> A is configured by winding an annular coil 53 around a stator core 51 having a plurality of claw magnetic poles (pole teeth) 52 arranged to face the magnet 42.

  On the other hand, the magnet 47 of the second annular portion 46 has a plurality of N poles and S poles (in this embodiment, four by eight), and the phase of the magnetic poles along the circumferential direction is between the magnets 47. Are arranged 45 degrees apart. The second stator 5 </ b> B is configured by winding an annular coil 63 around a stator core 61 having a plurality of claw magnetic poles 62 arranged to face the magnet 47.

  As shown in FIG. 4, the stator core 61 includes a first core 61A and a second core 61B having substantially the same shape. The first and second cores 61A and 61B include a cylindrical portion 65 (65A and 65B), and the claw magnetic poles 62 (62A and 62B) described above are arranged at equal intervals along the circumferential direction inside the cylindrical portion 65. Each is provided with a plurality (four in this embodiment). That is, the motor M of the present embodiment is configured as a claw pole type motor using claw magnetic poles 62 extending in the axial direction as pole teeth.

  The claw magnetic poles 62 are integrated by connecting their base portions 67 (67A, 67B) to the peripheral edge of the cylindrical portion 65 via connecting portions 66 (66A, 66B). Further, the axial length of the claw magnetic pole 62 is longer than the axial length of the cylindrical portion 65.

  When the first core 61A and the second core 61B described above are assembled and integrated as the stator core 61 shown in FIG. 1, the claw magnetic pole 62A of the first core 61A is connected to the second core 61B. The claw magnetic pole 62B of the second core 41 is inserted between the adjacent claw magnetic poles 62A, and the claw magnetic pole 62B of the second core 41 is inserted between the adjacent claw magnetic poles 62A of the first core 61A.

  That is, the claw magnetic poles 62A of the first core 61A and the claw magnetic poles 62B of the second core 61B are alternately arranged at equal intervals along the circumferential direction.

  On the other hand, the stator core 51 is similarly arranged with a plurality (eight in this embodiment) of claw magnetic poles 52 arranged alternately at equal intervals along the circumferential direction. On the contrary, it is provided on the outer peripheral surface side.

  In the motor M of this embodiment configured as described above, the magnetic flux generated by energizing the annular coils 53 and 63 can be efficiently transmitted between the claw magnetic poles 52 and 62 and the magnets 42 and 47. it can.

  Then, as shown in FIG. 3, the lines of magnetic force from the pair of stators 5 flow so as to sandwich the annular portions (first and second annular portions 41, 46) of the rotor 4 as in the prior art. In the embodiment, the nonmagnetic material 70 provided between the first annular portion 41 and the second annular portion 46 prevents the magnetic lines of force from the first and second stators 5A and 5B from interfering with each other. can do.

  In the rotor 4 of this embodiment, a ring member using, for example, aluminum, nonmagnetic stainless steel, synthetic resin (plastic) or the like as the nonmagnetic material 70 is interposed between the first annular portion 41 and the second annular portion 46. It can be formed by bonding.

  As described above, in the present embodiment, the rotor 4 is constituted by the first and second annular portions 41 and 46 in which the magnets 42 and 47 are arranged in the circumferential direction. Since the nonmagnetic material (nonmagnetic region) 70 is provided between the annular portion 46, it is possible to suppress interference of magnetic lines of force from the pair of stators 5.

  In particular, in the present embodiment, a nonmagnetic body 70 as a nonmagnetic region is provided between the first annular portion 41 and the second annular portion 46 of the rotor 4, and the first stator is disposed inside the first annular portion 41. 5A is arranged, and the second stator 5B is arranged outside the second annular portion 46. Therefore, the magnetic lines of force from the pair of stators 5 flow so as to sandwich the annular portions (first and second annular portions 41 and 46) of the rotor 4 as in the conventional technique. Since interference can be suppressed, there is an advantage that the annular portions (first and second annular portions 41 and 46) of the rotor 4 can be configured to be thinner in the radial direction than in the prior art.

  In the present embodiment, since the pole teeth of the first and second stators 5A and 5B are the claw magnetic poles 52 and 62, the thickness of the stator itself can be reduced.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to the drawings. 5 to 7 are diagrams showing a pump using the motor according to the present embodiment as a drive source.

  The pump P <b> 1 of the present embodiment is similar to the first embodiment described above in that the rotatable rotor 4 having the first annular portion 41 and the second annular portion 46, and the rotational driving force to the first annular portion 41. The motor M1 mainly composed of the first stator 5A for transmitting and the second stator 5B for transmitting the rotational driving force to the second annular portion 46 is used as a driving source.

  Here, the main difference of the present embodiment from the first embodiment is that the first annular portion 41 and the second annular portion 41 are provided as nonmagnetic regions provided between the first annular portion 41 and the second annular portion 46. The space portion 80 is provided between the annular portion 46. In the present embodiment, the first stator 5A is disposed in the space portion 80, and the claw magnetic pole 52 of the first stator 5A is disposed opposite to the magnet 42 of the first annular portion 41, and the second annular shape. The second stator 5B is disposed outside the portion 46, and the claw magnetic pole 62 of the second stator 5B is disposed opposite to the magnet 47 of the second annular portion 46. Therefore, in this embodiment, the claw magnetic pole 52 of the first stator 5A is provided on the inner peripheral surface side.

  In the motor M1 of the present embodiment configured as described above, the magnetic flux generated by energizing the annular coils 53 and 63 is converted into the claw magnetic poles 52 and 62 and the magnets 42 and 47 in the same manner as in the first embodiment. Can be efficiently transmitted to and from.

  And in this embodiment, as shown in FIG. 7, it has arrange | positioned in the direction of the magnetic force line which generate | occur | produces from the 1st stator 5A provided in the space part 80 as a nonmagnetic area | region, and the 2nd annular part 46 outer side. Since the direction of the magnetic force lines generated from the second stator 5B can be made the same direction, the magnetic force lines from the first and second stators 5A and 5B can be prevented from interfering with each other.

  As described above, according to the motor M1 of the present embodiment, the space portion (nonmagnetic) provided between the first annular portion 41 and the second annular portion 46 as in the first embodiment. The region 80 can suppress interference of the magnetic lines of force from the pair of stators 5.

  In particular, in the present embodiment, a space portion 80 as a nonmagnetic region is provided between the first annular portion 41 and the second annular portion 46 of the rotor 4, and the first stator 5 </ b> A is disposed in the space portion 80. The pawl magnetic pole 52 of the first stator 5A is disposed opposite to the magnet 42 of the first annular portion 41, and the second stator 5B is disposed outside the second annular portion 46, so that the second stator 5B is disposed. The claw magnetic pole 62 is disposed opposite to the magnet 47 of the second annular portion 46. Therefore, the direction of the lines of magnetic force generated from the first stator 5A and the direction of the lines of magnetic force generated from the second stator 5B can be the same direction (that is, a direction not interfering with each other). Therefore, the motor efficiency can be improved.

  Next, a modified example of the motor M1 according to the present embodiment will be described with reference to FIGS. FIG. 8 is an explanatory view showing a schematic development view of the claw magnetic poles 52 and 62 of the first and second stators 5A and 5B shown in FIG. 6 and a torque ripple characteristic diagram corresponding to the developed side by side.

  As shown in FIG. 8, in the motor M1 of the present embodiment, the claw magnetic pole 52 of the first stator 5A serving as the first phase and the claw magnetic pole 62 of the second stator 5B serving as the second phase are arranged in the circumferential direction. , The gaps S overlap each other, and a large variation K as shown in the torque ripple characteristic T may occur. And this big fluctuation | variation K will cause generation | occurrence | production of the cogging torque which brings about a vibration and noise.

  9 and 10, the claw magnetic pole 52 of the first stator 5A and the claw magnetic pole 62 of the second stator 5B are arranged at positions shifted between the respective phases in the circumferential direction. Like to do.

  Specifically, as shown in FIG. 10, the claw magnetic pole 52 of the first stator 5A and the claw magnetic pole 62 of the second stator 5B are arranged so as to be shifted by 90 degrees in electrical angle. Therefore, the claw magnetic pole 62 of the second stator 5B is disposed in the gap S1 between the adjacent claw magnetic poles 52 of the first stator 5A, and the second gap between the claw magnetic poles 62 of the second stator 5B is A claw magnetic pole 52 of one stator 5A is arranged.

  With such an arrangement of the claw magnetic poles 52 and 62, even if the magnetic resistance between the claw magnetic pole 52 of the first stator 5A of the first phase 5A and the rotor 4 is different between the magnetic pole part and the gap part, Since the claw magnetic poles 62 of the second stator 5B of the second phase are arranged corresponding to the gaps S1 of the second stator 5B, the magnetic resistance between the claw magnetic poles 62 of the second stator 5B and the rotor 4 is reduced. Therefore, the variation K1 as shown in the torque ripple characteristic T1 can be reduced.

  As described above, according to the motor M2 of the first modification, the claw magnetic pole 52 of the first stator 5A and the claw magnetic pole 62 of the second stator 5B are shifted to each other in the circumferential direction between the phases. Since it arrange | positions, the pulsation of the torque waveform of each phase is canceled, and a torque ripple can be reduced. That is, as shown in the torque ripple characteristic T1 of FIG. 10, the fluctuation K1 occurring in the torque ripple can be reduced by the height H compared to FIG. 6, thereby suppressing the occurrence of cogging torque and vibration. And noise can be reduced.

  FIG. 11 is a view showing a motor M3 according to a second modification, and is an explanatory view showing a schematic developed view of a magnet and a torque ripple characteristic view of a portion corresponding to the developed view.

  In the motor M3 of the second modification, as a means for reducing the torque ripple, the magnet 42 of the first annular portion 41 and the magnet 47 of the second annular portion 46 are arranged at positions shifted between the respective phases in the circumferential direction. It is a thing.

  Specifically, as shown in FIG. 11, the claw magnetic poles 52 of the first stator 5A and the claw magnetic poles 62 of the second stator 5B are arranged at the same position in the circumferential direction, and the first phase is the first phase. The magnet 42 of the first annular portion 41 and the magnet 47 of the second annular portion 46 serving as the second phase are arranged so as to be shifted by 90 degrees in electrical angle. Therefore, the magnet 47 of the second annular portion 46 is disposed in the gap S3 between the adjacent magnets 42 of the first annular portion 41, and the first annular portion is disposed in the gap S4 between the adjacent magnets 47 of the second annular portion 46. 41 magnets 42 are arranged.

  As described above, according to the motor M3 of the second modified example, the magnet 42 of the first annular portion 41 and the magnet 47 of the second annular portion 46 are arranged at positions shifted between the respective phases in the circumferential direction. Since it did in this way, the pulsation of the torque waveform of each phase is canceled, and a torque ripple can be reduced. That is, as shown in the torque ripple characteristic T2 in FIG. 11, the fluctuation K2 occurring in the torque ripple can be reduced by the height H1 compared to FIG. 6, thereby suppressing the occurrence of cogging torque and vibration. And noise can be reduced.

  12 and 13 are diagrams schematically showing motors M4 and M5 according to the third and fourth modified examples, in which (a) is a view as seen from the suction port 12 side of the pump P1, and (b) is a diagram. It is sectional drawing of (a).

  In the motor M4 of the third and fourth modified examples, the magnet 42 of the first annular portion 41 and the magnet 47 of the second annular portion 46 are configured to have substantially the same volume.

  That is, in the third modification shown in FIG. 12, by adjusting the width of the magnet 42 of the first annular portion 41 and the magnet 47 of the second annular portion 46, the volume (2πc × ah) of the magnet 42 is The volume (2πd × bh) of the two annular portions 46 is substantially equal. In the fourth modification shown in FIG. 13, the magnet 42 of the first annular portion 41 and the magnet 47 of the second annular portion 46 are used. Is adjusted so that the volume (2πf × ej) of the magnet 42 and the volume (2πi × gk) of the second annular portion 46 are substantially equal.

  As described above, according to the motors M4 and M5 of the third and fourth modifications, the magnet 42 of the first annular portion 41 and the magnet 47 of the second annular portion 46 have substantially the same volume. Thus, the working torque of the first annular portion 41 and the second annular portion 42 can be made substantially equal and can be rotated in a balanced manner.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to the drawings. 14 to 16 are views showing a pump using the motor according to the present embodiment as a drive source.

  The pump P2 of the present embodiment rotates in the same manner as in the first and second embodiments, the rotatable rotor 4 having the first annular portion 41 and the second annular portion 46, and the first annular portion 41. A motor M6 mainly composed of a first stator 5A for transmitting a driving force and a second stator 5B for transmitting a rotational driving force to the second annular portion 46 is used as a driving source.

  Here, the main difference of the present embodiment from the first embodiment is that the first annular portion 41 and the second annular portion 41 are provided as nonmagnetic regions provided between the first annular portion 41 and the second annular portion 46. The space portion 80A is provided between the annular portion 46 and the annular portion 46. In this embodiment, the first and second stators 5A and 5B are disposed in the space 80A, and the claw magnetic poles 52 of the first stator 5A are disposed to face the magnet 42 of the first annular portion 41. The point that the claw magnetic pole 62 of the second stator 5B is disposed opposite to the magnet 47 of the second annular portion 46 is different from the second embodiment. Therefore, in this embodiment, the claw magnetic pole 52 of the first stator 5A is provided on the inner peripheral surface side, and the claw magnetic pole 62 of the second stator 5B is provided on the outer peripheral surface side.

  In the motor M6 of the present embodiment configured as described above, the magnetic flux generated by energizing the annular coils 53 and 63 is converted into the claw magnetic poles 52 and 62 and the magnet in the same manner as in the first and second embodiments. It is possible to efficiently transmit between 42 and 47.

  And in this embodiment, as shown in FIG. 16, the direction of the magnetic force line which generate | occur | produces from the 1st stator 5A provided in space part 80A as a nonmagnetic area | region, and the 2nd similarly provided in space part 80A Since the direction of the magnetic lines of force generated from the stator 5B can be made opposite, it is possible to suppress the magnetic lines of force from the first and second stators 5A and 5B from interfering with each other.

  As described above, according to the motor M6 of the present embodiment, the space portion provided between the first annular portion 41 and the second annular portion 46 as in the first and second embodiments. (Nonmagnetic region) 80A can suppress interference of magnetic lines of force from the pair of stators 5.

  In particular, in the present embodiment, a space portion 80A as a nonmagnetic region is provided between the first annular portion 41 and the second annular portion 46 of the rotor 4, and the first and second stators 5A, 5B, the pawl magnetic pole 52 of the first stator 5A is disposed opposite to the magnet 42 of the first annular portion 41, and the pawl magnetic pole 62 of the second stator 5B is disposed opposite to the magnet 47 of the second annular portion 46. I am trying to let them. Therefore, the direction of the lines of magnetic force generated from the first stator 5A and the direction of the lines of magnetic force generated from the second stator 5B can be opposite directions (that is, directions that do not interfere with each other).

[Fourth Embodiment]
The fourth embodiment is an example in which a pump using the motor of the present invention (for example, the first modified example of the second embodiment) as a drive source is used for hot water supply equipment. FIG. 17 shows the dishwasher 100, in which water or hot water is supplied from the water supply port 101 to the water storage tank 102. The water or hot water supplied to the water storage tank 102 is sent from the water storage tank 102 to the nozzle 103 by the cleaning pump P1, and the tableware 104 arranged in the dishwasher 100 is cleaned by ejecting water or hot water from the nozzle 103. It is like that.

  In this embodiment, the washed water or hot water falls downward and is stored in the water storage tank 102, and is sent again to the nozzle 103 by the water purification pump P1. Then, after circulating cleaning for a predetermined time, the water in the water storage tank 102 is drained by stopping the cleaning pump P1 and operating the drain pump P2.

  Next, after supplying water or warm water to the water storage tank 102 again from the water supply port 101, the washing pump P1 is operated for a predetermined time to perform rinsing. Thereafter, the cleaning pump P1 is stopped and the drainage pump P2 is operated to drain the water or hot water in the water storage tank 102. The tableware 104 arranged in the dishwasher 100 is washed by rinsing by repeating the above operation several times.

  In this embodiment, the pump according to the present invention (pump using the motor of the second modification of the second embodiment as a drive source) is used for the washing pump P1 and the drainage pump P2 described above. Thus, according to this embodiment, the dishwasher 100 with low vibration and noise can be provided by configuring the washing pump P1 and the drainage pump P2 using the pump of the present invention.

[Fifth Embodiment]
The fifth embodiment is an example in which a pump using the motor of the present invention (first modification of the second embodiment) as a drive source is used for hot water supply equipment. FIG. 18 shows a schematic diagram of an eco cute system of a hot water supply unit 200 which is a hot water supply device. This hot water supply unit 200 can be used for eco-cute, gas hot water supply equipment, cogeneration, and the like.

  The hot water supply unit 200 includes a heat pump unit 201, a hot water storage unit 202, a bath 203, a floor heating 204, a reheating heat exchanger 205, a heating heat exchanger 206, and the like.

  Further, the hot water supply unit 200 is provided with a hot water faucet 207 for storing the kitchen and the bathroom and an auxiliary tank 208 for accumulating hot water, and a pressure reducing valve 210 is provided downstream of the water supply port 209 and the floor heating 204 is provided. Is provided with a thermal valve 211. Further, a plurality of mixing valves 212 and safety valves 213 are provided in each pipe.

  And while driving a plurality of pumps P4, P5, P6, P7, P8, and controlling each of the above valves, water and hot water are supplied to a desired temperature, It can be supplied at a flow rate.

  In the fifth embodiment, the pumps according to the present invention (pumps using the motor of the first modification of the second embodiment as a drive source) are used for the above-described pumps P4 to P8. Thus, according to this embodiment, the hot water supply unit 300 having low vibration and low noise can be obtained by configuring each of the pumps P4 to P8 using the pump of the present invention in the hot water supply unit 200.

[Sixth Embodiment]
The sixth embodiment is an example in which a pump using the motor of the present invention (first modification of the second embodiment) as a drive source is used in a washing machine. FIG. 19 shows the washing machine 300. In the washing machine 300, the washing tub 301 is rotationally controlled by a motor (not shown), and the washing tub 301 is rotated and water in the washing machine 300 is circulated by the circulation pump P3 to wash clothes and the like. Like to do.

  In the washing machine 300 of the present embodiment, the pump according to the present invention (a pump using the motor of the first modification of the second embodiment as a drive source) is used as the circulation pump P3 described above. Thus, according to this embodiment, the washing machine 300 with low vibration and low noise can be obtained by configuring the circulation pump P3 using the pump of the present invention.

  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 second embodiment, nothing is provided around the shaft portion 48, but the bearing portion 49 is fixed to the separation plate 2 as in the pump P3 of the first modification shown in FIG. The shaft portion 48 that is rotatably supported by the shaft support portion 44 and the shaft support portion 44A may be rotated via the bearing portion 49.

  Further, like the pump P4 of the second modified example shown in FIG. 21, the bearing portion 49A is integrally provided on the support plate 45 of the rotor 4, and the shaft portion is inserted and fitted into the shaft support portion 44B and the shaft support portion 44C. As the fixed shaft 48A, the rotor 4 may be rotated through the bearing portion 49A.

  Thus, by providing the bearing portions 49 and 49A that support the shaft portions 48 and 48A of the rotor 4, it is possible to provide the pumps P3 and P4 with low vibration and low noise.

  Moreover, in the said 2nd Embodiment, although it was set as the 2 phase structure of the 1st stator 5A and the 2nd stator 5B, it is good also as a 3 phase or more.

  In the first to third embodiments, the claw pole type iron core using the claw magnetic pole 8 extending in the axial direction of the rotor 4 is used as the pole teeth of the first and second stators 5A and 5B. For example, a laminated iron core may be used.

4 rotor 5 stator 5A first stator 5B second stator 41 first annular portion 42 magnet 46 second annular portion 47 magnet 51 stator core 52 annular coil (coil)
53 pole teeth 70 non-magnetic material (non-magnetic region)
80, 80A space (nonmagnetic region)
100 dishwasher 200 washing machine 300 hot water supply unit M motor P pump

Claims (13)

A rotatable rotor having a first annular portion in which a magnet is disposed in a circumferential direction, and a second annular portion that is provided outside the first annular portion and in which a magnet is disposed in a circumferential direction;
A first stator having a coil wound around a stator core having pole teeth for transmitting rotational driving force to the first annular portion;
A second stator in which a coil is wound around a stator core having pole teeth that transmit rotational driving force to the second annular portion,
A motor comprising a nonmagnetic region provided between the first annular portion and the second annular portion. The nonmagnetic region is a nonmagnetic material disposed between the first annular portion and the second annular portion,
The first stator is disposed inside the first annular portion, and the pole teeth of the first stator are disposed opposite to the magnet of the first annular portion,
The said 2nd stator is arrange | positioned on the outer side of the said 2nd annular part, The pole tooth of the said 2nd stator is arrange | positioned facing the magnet of the said 2nd annular part, The Claim 1 characterized by the above-mentioned. motor. The nonmagnetic region is a space portion interposed between the first annular portion and the second annular portion,
The first stator is disposed in the space, and the pole teeth of the first stator are disposed opposite to the magnet of the first annular portion,
The said 2nd stator is arrange | positioned on the outer side of the said 2nd annular part, The pole tooth of the said 2nd stator is arrange | positioned facing the magnet of the said 2nd annular part, The Claim 1 characterized by the above-mentioned. motor. The nonmagnetic region is a space portion interposed between the first annular portion and the second annular portion,
The first and second stators are disposed in the space, and the pole teeth of the first stator are disposed opposite to the magnets of the first annular portion, and the pole teeth of the second stator are disposed in the second space. The motor according to claim 1, wherein the motor is disposed so as to face the magnet of the annular portion.   5. The motor according to claim 1, wherein pole teeth of the first and second stators are claw magnetic poles extending in an axial direction of the rotor.   The pole teeth of the first stator and the pole teeth of the second stator are arranged at positions shifted between the respective phases in the circumferential direction. Motor.   The motor according to any one of claims 1 to 5, wherein the magnet of the first annular portion and the magnet of the second annular portion are arranged at positions shifted between the respective phases in the circumferential direction. .   The motor according to any one of claims 1 to 7, wherein the magnet of the first annular portion and the magnet of the second annular portion are configured to have substantially the same volume.   A pump using the motor according to any one of claims 1 to 8 as a drive source.   The pump according to claim 9, further comprising a bearing portion that supports a shaft portion of the rotor.   A hot-water supply device comprising the pump according to claim 9 or 10.   A dishwasher equipped with the pump according to claim 9 or 10.   A washing machine comprising the pump according to claim 9 or 10.

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