JPWO2011042975A1 - Fan motor and air conditioner equipped with the same - Google Patents

Abstract

A fan motor capable of improving design freedom while suppressing an increase in size of the fan motor itself, and an air conditioner including the fan motor are obtained. The blade 40, the rotor 10 provided on the outer peripheral portion of the blade portion 20, and the motor 40 including the stator 30 disposed on the outer peripheral side of the rotor 10 and provided with the teeth 32 on the inner peripheral surface, the stator 30 and the rotor 10, the housing 50 has a polygonal shape, and the stator 30 is disposed at at least one corner of the housing 50. The part or the whole is provided with auxiliary teeth 33 at the end.

Description

  The present invention relates to a fan motor and an air conditioner including the same.

  Conventional air conditioners have been proposed in which a propeller fan is used as a fan unit in order to make the indoor unit thinner and smaller. Such a propeller fan is provided with a boss portion having a rotation center and a blade portion having blades formed from the boss portion to the outer peripheral side. And the motor which rotates a blade | wing part is provided in the boss | hub part. That is, the motor is an outer rotor type, and the blade portion is provided on the rotor side (rotation side). For this reason, when the motor is enlarged, the size of the blades arranged outside the motor is limited, and the ventilation path is blocked. Therefore, there are problems such that a sufficient air volume cannot be obtained, the degree of freedom in design of the blade portion is small, and the fan efficiency is lowered. Further, if the size of the motor is reduced in order to secure the ventilation path, there is a problem that the efficiency of the motor itself is lowered.

  Therefore, in order to solve these problems, for example, “a magnet is annularly attached to the outer peripheral portion of the fan, and the outer surface of the magnet is sequentially arranged in the circumferential direction as N pole, S pole, N pole,. A fan motor has been proposed, in which a plurality of fixed coils are arranged on the outside and an annular yoke is provided outside the coils. Such a fan motor can make the boss portion smaller than that provided with a motor in the boss portion, so that the ventilation path can be enlarged and the blade can be made to the vicinity of the rotation axis. For this reason, the freedom degree of design of a fan motor improves. In addition, since such a fan motor can increase the rotor radius, a large torque can be obtained and an improvement in efficiency can be expected.

Japanese Patent Application Laid-Open No. 61-52181 (first page, FIG. 1)

  However, although such a fan motor (for example, refer patent document 1) can make a boss | hub part small, since a stator is arrange | positioned in the outer peripheral side whole region of a fan, the problem that a housing enlarges and a fan motor itself will become large. There was a point.

  The present invention has been made to solve the above-described problems, and includes a fan motor capable of improving the degree of design freedom while suppressing an increase in size of the fan motor itself, and the same. The purpose is to obtain an air conditioner.

  A fan motor according to the present invention includes a blade portion, a rotor provided on the outer peripheral portion of the blade portion, a motor disposed on the outer peripheral side of the rotor, and a stator provided with teeth on the inner peripheral surface, and the stator and rotor. And a housing arranged to cover the outer peripheral side of the housing, the housing is polygonal, the stator is arranged at at least one corner of the housing, and part or all of the stator is an end portion Is provided with auxiliary teeth.

  In the present invention, the stator is arranged at the corner of the polygonal housing. For this reason, the magnitude | size of a housing can be maintained to the magnitude | size comparable to the housing of the fan which has arrange | positioned the motor to the boss | hub part. And since the motor is provided in the outer peripheral side of a blade | wing part, a ventilation path can be ensured large and the design freedom of a fan motor can be improved.

  Here, by arranging the stator at the corner of the polygonal housing, the stator exists only in a part on the outer peripheral side of the rotor. For this reason, there is a concern about the occurrence of cogging due to the end of the stator. Therefore, in the present invention, auxiliary teeth are provided at some or all ends of the stator. For this reason, the cogging resulting from the edge part of a stator can be reduced.

1 is an external perspective view showing a fan motor according to Embodiment 1 of the present invention. 1 is an assembled perspective view of a fan motor according to Embodiment 1 of the present invention. It is a front view which shows the stator which concerns on Embodiment 1 of this invention. It is a characteristic view which shows the auxiliary teeth width dependence of cogging in the fan motor which concerns on Embodiment 1 of this invention. It is a front view which shows the fan motor which concerns on Embodiment 2 of this invention. It is a front view which shows the fan motor which concerns on Embodiment 3 of this invention. It is a front view which shows the stator which concerns on Embodiment 3 of this invention. It is a front view which shows another example of the stator which concerns on Embodiment 3 of this invention. It is a front view which shows the fan motor which concerns on Embodiment 4 of this invention. It is a front view which shows the fan motor which concerns on Embodiment 5 of this invention. It is a front view which shows the fan motor which concerns on Embodiment 6 of this invention. It is a longitudinal cross-sectional view which shows an example of the air conditioner which concerns on Embodiment 7 of this invention.

Embodiment 1 FIG.
FIG. 1 is an external perspective view showing a fan motor according to Embodiment 1 of the present invention. FIG. 2 is an assembled perspective view of the fan motor. FIG. 3 is a front view showing a stator of the fan motor.

  The fan motor 100 has an axial flow fan structure, and includes a motor 40 including a blade portion 20, a rotor 10, and a stator 30, a housing 50, and the like.

The housing 50 has a substantially rectangular frame shape, and the blade portion 20 is provided inside.
The blade portion 20 includes a boss portion 22 and a plurality of blades 21. The boss portion 22 is a rotation center of the blade portion 20, and the blade 21 is formed on the outer peripheral portion thereof. A substantially annular ring 23 is formed on the outer periphery of the blade 21. The blade portion 20 (the blade 21, the boss portion 22, and the ring 23) is integrally formed of, for example, a resin material. A rotating shaft and a bearing (not shown) into which the rotating shaft is inserted are arranged inside the boss portion 22. The outer peripheral portion of the bearing is held by a housing 50, for example.
In addition, the material which forms the blade | wing part 20 should just be a material which can ensure the rigidity which does not deform | transform by not only a resin material but magnetic attraction (magnetic attraction between the rotor 10 and the stator 30), air resistance, etc. . For example, the material forming the blade portion 20 may be a metal material or the like.

  The rotor 10 is provided on the outer peripheral surface of the ring 23 of the blade portion 20. The rotor 10 includes a magnet 11 and a rotor core 12. The rotor core 12 has a substantially annular shape and is provided on the outer peripheral surface of the ring 23. The magnet 11 has a substantially annular shape, and is provided on the outer peripheral surface of the rotor core 12.

  The magnet 11 is a rubber magnet having a thickness of 1.5 mm and a residual magnetic flux density of 0.245 T, for example. The magnet 11 has a flat plate shape, and the orientation of the magnet 11 is normal parallel magnetization, and 32 poles are magnetized. The magnet 11 is wound around and adhered to the outer peripheral surface of the rotor core 12. In the first embodiment, the axial width of the magnet 11 (the width in the rotational axis direction of the blade portion 20) is, for example, 10 mm, and is matched with the axial width of the stator 30.

  Note that the magnet 11 may be a rare earth sintered magnet, a plastic magnet, a ferrite magnet, or the like. Further, the method of fixing the magnet 11 to the rotor core 12 is not limited to the method of the first embodiment. For example, the magnet 11 may be formed in a substantially annular shape, and the rotor core 12 may be fitted on the inner peripheral surface of the magnet 11. Further, for example, the magnet 11 may be divided into a plurality of segments, and these segments may be attached to the outer peripheral surface of the rotor core 12. When the magnet 11 is divided into a plurality of segments, the circumferential width of each segment may be made smaller than the pole pitch, and a space may be provided between the segments. Further, for example, when the blade portion 20 is used at a high speed, it may be fixed from the outside of the magnet 11 with a nonmagnetic material such as glass epoxy (glass fiber + epoxy resin). Further, for example, the axial width of the magnet 11 may be made larger than the axial width of the stator 30 to cause overhang. Thereby, the magnetic flux leakage from the axial direction edge part of the stator 30 can be suppressed.

  The rotor core 12 is obtained by laminating and bonding electromagnetic steel sheets and processing them into a ring shape. As the material of the rotor core 12, a thick iron core and other magnetic materials can be adopted in addition to the electromagnetic steel sheet. In addition, when the orientation of the magnet 11 is the Hullback orientation, the magnetic path does not come to the inner side (blade part 20 side), so the rotor core 12 does not have to be provided. Since the rotor core 12 is a magnetic body, it is generally heavy. For this reason, weight reduction of the fan motor 100 can be achieved by not providing the rotor core 12. Note that the rotor 10 may be deformed due to insufficient rigidity of the rotor 10 to generate noise. In such a case, the rotor core 12 may be provided.

  As shown in FIG. 3, the stator 30 includes a substantially L-shaped stator core 31. The angle formed by both outer peripheral surfaces of the stator core 31 is substantially the same angle (approximately 90 °) as the corner of the housing 50 to which the stator 30 is attached. Teeth 32 is provided on the inner peripheral surface of the stator core 31 (the surface facing the blade portion 20). Since motor 40 of the first embodiment is a three-phase motor, three teeth 32 (U-phase teeth 32a, V-phase teeth 32b, and W-phase teeth 32c) are provided on the inner peripheral surface of stator core 31. . A coil (not shown) is wound around the U-phase teeth 32a, the V-phase teeth 32b, and the W-phase teeth 32c. In addition, auxiliary teeth 33 are provided at both ends of the stator core 31 on the inner peripheral surface side. As with the rotor core 12, the stator 30 is formed by laminating electromagnetic steel sheets into the shape shown in FIG. 3 by wire cutting or the like. The stator 30 may be formed of a thick iron core or other magnetic material.

These stators 30 are provided at two opposite corners of the housing 50. That is, the housing 50 is provided so as to cover the outer peripheral side of the motor 40 (the rotor 10 and the stator 30). When the stator 30 is attached to the corners of the housing 50, both outer peripheral surfaces of the stator core 31 are brought into contact with (in contact with) the corners of the housing 50 (more specifically, both side surfaces adjacent to the corners). Further, the back surface of the stator core 31 is brought into contact with (in contact with) the step portion 51 of the housing 50. Thereby, the stator 30 is positioned at the corner of the housing 50. In this state, screws or the like (not shown) are inserted from the fixing holes 34 to fix the stator 30 to the corners of the housing 50.
In a state where the stator 30 is fixed to the corner portion of the housing 50, the tip portions of the U-phase teeth 32a, the V-phase teeth 32b, the W-phase teeth 32c and the auxiliary teeth 33, and the outer peripheral surface of the magnet 11 of the rotor 10 A certain gap is formed between them.

The position where the stator 30 is provided is not limited to the position shown in the first embodiment. For example, the stator 30 may be provided at one corner of the housing 50. Further, for example, the stator 30 may be provided at three corners of the housing 50. Further, for example, the stator 30 may be provided at all corners (four locations) of the housing 50.
In the first embodiment, the stator 30 is provided at the opposite corners of the housing 50 in order to balance the magnetic attractive force generated between the rotor 10 and the stator 30. By providing the stator 30 at the opposite corners of the housing 50, it is possible to suppress vibration when the blade portion 20 rotates, and to suppress noise generated when the blade portion 20 rotates. .

  In the fan motor 100 configured as described above, since the stator 30 is arranged at the corner of the housing 50, each side of the housing 50 can be brought close to the vicinity of the outer peripheral portion of the rotor 10. Therefore, the fan motor 100 can be produced in the same size as a conventional fan in which a motor is arranged in the boss portion. Further, since the motor 40 (the rotor 10 and the stator 30) is provided on the outer peripheral side of the blade portion 20, a large ventilation path can be secured and the degree of freedom in designing the fan motor 100 can be improved.

  Here, in the fan motor 100 according to the first embodiment, the stator 30 exists only in part of the outer peripheral side of the rotor 10. For this reason, when the blade | wing part 20 rotates, we are anxious about generation | occurrence | production of the cogging resulting from the edge part of the stator 30. FIG. The cogging due to the end portion is generated by an attractive force generated between the teeth 32 (U-phase teeth 32 a and W-phase teeth 32 c) provided on the end portion side of the stator 30 and the magnet 11 of the rotor 10. Then, the cogging (torque pulsation) caused by the end of the stator 30 is twice the number of magnetic poles of the magnet 11 when the rotor 10 makes one rotation (2f component in terms of electrical angle).

  Therefore, for example, when two auxiliary teeth 33 are provided, the distance between the auxiliary teeth 33 is (2m−1) τ / 2 (where m is a positive integer and τ is the pole pitch of the magnetic poles of the magnet 11). Thus, cogging caused by the end of the stator 30 can be offset and reduced. However, this is an ideal state in which the circumferential distribution of the gap magnetic flux by the magnetic poles is a sine wave, and is limited to, for example, the case where the magnet 11 is magnetized in the Halbach orientation. That is, when the magnet 11 is magnetized in a radial orientation, a parallel orientation, or the like, a harmonic component is included in the distribution of the gap magnetic flux (in addition to the 2f component in terms of electrical angle, higher order components such as the 4f component are also included). Superimposed). For this reason, the distance between the auxiliary teeth 33 suitable for suppressing cogging caused by the end of the stator 30 varies depending on the configuration of the motor 40. Therefore, in order to cancel out the n-fold component of cogging caused by the end of the stator 30, the distance between the auxiliary teeth 33 may be (nm-1) τ / 2 instead of the above formula. However, it is difficult to cancel all the components of cogging caused by the end of the stator 30 at the same time.

Therefore, in the first embodiment, magnetic field analysis is performed to obtain a suitable distance between the auxiliary teeth 33 in order to suppress cogging caused by the end portion of the stator 30. Note that the distance between the auxiliary teeth 33 may be the distance between the auxiliary teeth 33 provided on different stators 30.
FIG. 4 is a characteristic diagram showing the auxiliary teeth width dependence of cogging in the fan motor according to Embodiment 1 of the present invention. As shown in FIG. 5, when the tip width of the auxiliary teeth 33 (the width from the tip of one auxiliary tooth 33 to the tip of the other auxiliary tooth 33) is 15 ° in electrical angle, cogging is minimized. . Therefore, in Embodiment 1, the width between the auxiliary teeth 33 provided at both ends of the stator 30 is set to 15 ° in electrical angle. The slot opening width L1 between the auxiliary teeth 33 and the teeth 32 is set to be the same as the slot opening width L2 between the teeth 32 (FIG. 3).

Moreover, the corner | angular part of the housing 50 in which the stator 30 is arrange | positioned is not fan-shaped (substantially circular arc shape) in the inner peripheral side shape. For this reason, when the stator 30 is arranged at the corner of the housing 50, magnetic imbalance occurs.
For example, when the U-phase teeth 32a, the V-phase teeth 32b, and the W-phase teeth 32c are arranged side by side in the circumferential direction (rotational direction of the rotor 10) as in the first embodiment, the V-phase teeth Vb and the V-phase teeth 32b Since the teeth 32 are adjacent to each other between the phase and the W phase, the magnetic resistance of the magnetic circuit is small. On the other hand, between the U-phase and the W-phase, the distance between the teeth 32 is long, so the magnetic resistance of the magnetic circuit increases. For this reason, the U-phase teeth 32a and the W-phase teeth 32c may have higher magnetic resistance than the V-phase teeth 32b. Therefore, there is a difference between the interlinkage magnetic flux of the U-phase teeth 32a and the W-phase teeth 32c and the interlinkage magnetic flux of the V-phase teeth 32b.

  However, in the first embodiment, the auxiliary teeth 33 are provided adjacent to the U-phase teeth 32a and the W-phase teeth 32c. For this reason, in addition to the magnetic circuit passing through the teeth 32 of each phase, a magnetic circuit via the auxiliary teeth 33 is newly added. Therefore, the interlinkage magnetic flux of the U-phase teeth 32a and the W-phase teeth 32c increases, and the difference from the interlinkage magnetic flux of the V-phase teeth 32b can be reduced.

  In the first embodiment, the coils wound around each of the U-phase teeth 32a, the V-phase teeth 32b, and the W-phase teeth 32c are connected to the drive circuit by Y connection (not shown). The in-phase coils of different stators 30 are connected in series. And it is driven by two-phase energization sensorless drive. The coil connection method and the energization method are not limited to this. For example, the coils wound around each of the U-phase teeth 32a, the V-phase teeth 32b, and the W-phase teeth 32c may be connected to the drive circuit by Δ connection. The energization of the coil may be a sine wave (sine wave drive). A rotational position sensor that detects the position of the rotor 10 may be installed.

  As described above, in the fan motor 100 configured as described above, since the stator 30 is disposed at the corner of the housing 50, each side of the housing 50 can be brought close to the vicinity of the outer peripheral portion of the rotor 10. Therefore, the fan motor 100 can be produced in the same size as a conventional fan in which a motor is arranged in the boss portion. Further, since the motor 40 (the rotor 10 and the stator 30) is provided on the outer peripheral side of the blade portion 20, a large ventilation path can be secured and the degree of freedom in designing the fan motor 100 can be improved. Further, since the auxiliary teeth 33 are provided at both ends of the stator 30, cogging caused by the ends of the stator 30 can be reduced. Therefore, noise when the fan motor 100 is driven can be reduced.

  In addition, since the stator 30 is arranged at a plurality of corners of the housing 50 (two corners in the first embodiment), the motor is compared with the case where the stator 30 is provided only at one location of the housing 50. A torque of 40 can be increased.

  Further, since the stator 30 is provided at the opposite corners of the housing 50, the magnetic attractive force generated between the rotor 10 and the stator 30 can be balanced. For this reason, it can suppress vibrating when the blade | wing part 20 rotates, and the noise at the time of driving the fan motor 100 can be reduced.

  Further, since the stator 30 is disposed so as to be in contact with the two side surfaces adjacent to the corner portion of the housing 50, the positional accuracy of the stator 30 with respect to the rotor 10 is improved.

  The slot opening width L1 between the auxiliary teeth 33 and the teeth 32 is set to be the same as the slot opening width L2 between the teeth 32. For this reason, the cogging caused by the slot opening width between the auxiliary teeth 33 and the teeth 32 is the same as the cogging caused by the slot opening width between the teeth 32. Therefore, it becomes easy to take measures against cogging caused by the opening width between the teeth.

  In addition, since the motor 40 is a three-phase motor, a highly efficient fan motor 100 can be obtained as compared with a fan motor using a single-phase motor.

The stator 30 is provided with one U-phase tooth 32a, one V-phase tooth 32b, and one W-phase tooth 32c, but a plurality of U-phase teeth 32a, V-phase teeth 32b, and W-phase teeth 32c are provided. You may provide in the stator 30. FIG.
In the first embodiment, the slot combination of the motor 40 (the rotor 10 and the stator 30) is not shown, but the slot combination of the motor 40 is not particularly limited. For example, the slot combination of the motor 40 may be 2: 3, 4: 3, 8: 9, or the like.

Embodiment 2. FIG.
For example, the arrangement position of the stator 30 and the formation position of the auxiliary teeth 33 may be as follows. In the second embodiment, items not particularly described are the same as those in the first embodiment.

FIG. 5 is a front view showing a fan motor according to Embodiment 2 of the present invention.
The fan motor 101 according to the second embodiment is provided with stators (one stator 30 and three stators 30a) at all corners (four locations) of the housing 50. Of the stators, one stator 30 is provided with auxiliary teeth 33 at both ends thereof, and the other three stators 30a are not provided with auxiliary teeth. These points are differences between the fan motor 101 according to the second embodiment and the fan motor 100 according to the second embodiment. Other configurations are the same.
That is, the fan motor 101 cancels and reduces cogging caused by the end portions of the stator 30 and the stator 30a by the auxiliary teeth provided at both end portions of the stator 30.

  The fan motor 101 configured as described above has twice as many (four) stators (one stator 30, three stators) as the fan motor 100 according to the first embodiment in which the two stators 30 are provided. A stator 30a) is provided. For this reason, the torque generation location is twice that of the fan motor 100 according to the first embodiment. That is, when the same current flows through the coil, the torque generated in fan motor 101 according to the second embodiment is double the torque generated in fan motor 100 according to the first embodiment. Therefore, the fan motor 101 according to the second embodiment can be made thinner and smaller than the fan motor 100 according to the first embodiment. For example, when the fan motor 100 according to the first embodiment and the fan motor 101 according to the second embodiment are manufactured to have the same torque, the fan motor 101 according to the second embodiment has the rotor core 12 and the stator ( The laminated thickness of the electromagnetic steel plates of the stator 30 and the stator 30) is set to ½ of the laminated thickness of the electromagnetic steel plates of the rotor core 12 of the fan motor and the stator (the stator 30 and the stator 30) according to the first embodiment. Can do.

  In addition, since cogging caused by the end portions of the stator 30 and the stator 30a is offset and reduced by the auxiliary teeth 33 provided in one stator (stator 30), the remaining three stators (stator 30a) have auxiliary teeth. 33 is no longer needed. For this reason, the fan motor 101 can be reduced in weight. Moreover, if the space vacated by reducing the auxiliary teeth 33 is used as an installation space for the stator core and the coil, iron loss and copper loss of the stator 30a can be reduced.

Embodiment 3 FIG.
Further, the arrangement position of the stator 30 and the formation position of the auxiliary teeth 33 may be set as follows, for example. In Embodiment 3, items that are not particularly described are the same as those in Embodiment 1 or Embodiment 2.

FIG. 6 is a front view showing a fan motor according to Embodiment 3 of the present invention. FIG. 7 is a front view showing the stator.
In the fan motor 102 according to the third embodiment, auxiliary teeth 33 are provided only at one end of the stator 30b. Other configurations are the same as those of the fan motor 100 according to the first embodiment.

  More specifically, among the stators 30b provided at opposite corners of the housing 50, one stator 30b (the upper right stator 30b in FIG. 6) is provided with auxiliary teeth 33 so as to be adjacent to the W-phase teeth 32c. ing. Of the stators 30b provided at the opposite corners of the housing 50, the other stator 30b (lower left stator 30b in FIG. 6) is provided with auxiliary teeth 33 so as to be adjacent to the U-phase teeth 32a. .

These stators 30b have the same shape as shown in FIG. That is, the upper right stator 30b in FIG. 6 is provided at the corner of the housing 50 so that the surface of FIG. Further, the lower left stator 30b in FIG. 6 is provided at the corner of the housing 50 so that the front surface in FIG.
Thereby, the stator 30b of the same shape can be used.

When using the stator 30b in which the auxiliary teeth 33 are provided only at one end of the stator 30b, only one of the U-phase teeth 32a and the W-phase teeth 32c is used depending on the connection method of the coils wound around the teeth. Linkage magnetic flux does not increase.
In the fan motor 102 according to the third embodiment, in-phase coils of different stators 30b are connected in series. Thereby, linkage flux can be increased in both the U-phase teeth 32a and the W-phase teeth 32c.

  In addition, since the auxiliary teeth 33 are provided only at one end of the stator 30b, a space is generated at the other end. For this reason, for example, as shown in FIG. 8, in order to use this space, the root interval of the teeth 32 may be widened in the space direction. Thereby, the range which can wind a coil can be increased. Since the coil cross-sectional area increases, the coil resistance can be reduced and the copper loss can be reduced.

Embodiment 4 FIG.
By making the shape of the housing as follows, the fan motor can be further downsized. In the fourth embodiment, items that are not particularly described are the same as those in the first to third embodiments.

FIG. 9 is a front view showing a fan motor according to Embodiment 4 of the present invention.
In the fan motor 103 according to the fourth embodiment, the corner portion of the housing 50a where the stator 30b is not provided is deleted. Thereby, the shape of the housing 50a is substantially hexagonal. Other configurations are the same as those of the fan motor 102 according to the third embodiment.

  In the fan motor 103 thus latticed, the corner portion of the housing 50a where the stator 30b is not provided is deleted, so that the fan motor can be further downsized.

Embodiment 5 FIG.
Further, the shape of the housing may be as follows. In the fifth embodiment, items that are not particularly described are the same as those in the first to fourth embodiments.

FIG. 10 is a front view showing a fan motor according to Embodiment 5 of the present invention.
The fan motor 104 according to the fifth embodiment is a substantially triangular housing 50b. Moreover, the stator 30c is provided in all the corner | angular parts of the housing 50b, for example. The stator 30c is provided with auxiliary teeth 33 at both ends thereof. Further, in the stator 30c, an angle formed by both outer peripheral surfaces of the stator core 31 is substantially the same angle (approximately 60 °) as a corner portion of the housing 50b.

  In the fan motor 104 configured as described above, the present invention can be implemented even when the housing has a triangular shape due to the space where the fan motor is arranged.

In the fifth embodiment, the stator 30c is provided at all corners of the housing 50b. However, the stator 30c may be provided at some corners of the housing 50b. In the fifth embodiment, in order to balance the magnetic attractive force generated between the rotor 10 and the stator 30c, the stator 30c is provided at all corners of the housing 50b.
Further, the auxiliary teeth 33 need not be provided in all the stators 30c, and may be provided in some of the stators 30c. The auxiliary teeth 33 may be provided one by one on different stators 30c.

Embodiment 6 FIG.
Further, the shape of the housing may be as follows. In the sixth embodiment, items not particularly described are the same as those in the first to fifth embodiments.

FIG. 11 is a front view showing a fan motor according to Embodiment 6 of the present invention.
The fan motor 104 according to the sixth embodiment is a substantially hexagonal housing 50c, for example. Moreover, the stator 30d is provided in all the corner | angular parts of the housing 50c, for example. The stator 30d is provided with auxiliary teeth 33 at both ends thereof. Further, in the stator 30d, an angle formed by both outer peripheral surfaces of the stator core 31 is substantially the same angle (approximately 120 °) as a corner portion of the housing 50c.

As described above, as can be seen from the first to sixth embodiments, the present invention can be implemented as long as it is a fan motor including a polygonal housing. For example, the housing may be octagonal.
In the first to sixth embodiments, the stator (stator 30 to stator 30d) is provided so as to balance the magnetic attractive force generated between the rotor and the stator. However, the magnetism generated between the rotor and the stator is provided. A stator may be provided at a position where the balance of the suction force is lost. For example, in a polygonal housing having an even number of corners, a stator may be provided at a corner portion at an asymmetric position (corner portion at a position not facing).
If there is room in the arrangement space of the stator 30, a plurality of U-phase teeth 32a, V-phase teeth 32b, and W-phase teeth 32c may be provided on the stator.

Embodiment 7 FIG.
In the seventh embodiment, an example in which the fan motor shown in the first to sixth embodiments is used in an air conditioner will be described.

FIG. 12 is a longitudinal sectional view showing an example of an air conditioner according to Embodiment 7 of the present invention. FIG. 12 shows an example in which the fan motor 100 according to Embodiment 1 is used for an indoor unit 200 of an air conditioner. FIG. 12 shows the left side of the figure as the front side of the indoor unit 200. Based on FIG. 12, the structure of the indoor unit 200 will be described.
Of course, the fan motor shown in the second to sixth embodiments may be used as the fan motor of the indoor unit 200.

  The indoor unit 200 supplies conditioned air to an air-conditioning target area such as a room by using a refrigeration cycle that circulates refrigerant. This indoor unit 200 mainly includes a casing 110 in which an inlet 111 for sucking indoor air into the interior and an outlet 115 for supplying conditioned air to an air-conditioning target area are formed, and the interior of the casing 110 The fan motor 100 that sucks room air from the suction port 111 and blows air-conditioned air from the air outlet 115, and the air path from the suction port 111 to the fan motor 100, and exchanges heat between the refrigerant and the room air. And a heat exchanger 114 that produces conditioned air.

  The inlet 111 is formed in the upper part of the housing 110. The air outlet 115 is formed in the lower part of the housing 110 (more specifically, the lower side of the front surface of the housing 110). The fan motor 100 is disposed on the downstream side of the suction port 111 and on the upstream side of the heat exchanger 114. Further, for example, three fan motors 100 are arranged in the direction perpendicular to the paper surface. Note that the number of fan motors 100 installed is merely an example. What is necessary is just to change suitably the installation number of the fan motor 100 according to the required air volume.

  The heat exchanger 114 is disposed on the leeward side of the fan motor 100. The heat exchanger 114 includes a front side heat exchanger 114 a disposed on the front side of the housing 110 and a back side heat exchanger 114 b disposed on the back side of the housing 110. As this heat exchanger 114, for example, a fin tube heat exchanger or the like may be used. The suction port 111 is provided with a grill 112 and a filter 113. Furthermore, the blower outlet 115 is provided with a mechanism for controlling the blowing direction of the airflow, such as a vane (not shown).

Here, the flow of air in the indoor unit 200 will be briefly described.
First, room air flows into the indoor unit 200 from the suction port 111 formed in the upper part of the housing 110 by the fan motor 100. At this time, dust contained in the air is removed by the filter 113. When this indoor air passes through the heat exchanger 114, it is heated or cooled by the refrigerant flowing in the heat exchanger 114 to become conditioned air. The conditioned air is blown out of the indoor unit 200 from the air outlet 115 formed in the lower part of the housing 110, that is, to the air-conditioning target area.

  In the indoor unit 200 (air conditioner) configured as described above, the fan motor 100 described in the first embodiment is used. The fan motor 100 can be made thinner than a conventional propeller fan, and the area of the blade 21 can be increased. For this reason, the indoor unit 200 according to Embodiment 7 can be made thinner and smaller than the conventional indoor unit. Further, when the indoor unit 200 according to Embodiment 7 is manufactured in the same size as the conventional indoor unit, an indoor unit having a larger air volume than the conventional indoor unit can be obtained.

  10 rotors, 11 magnets, 12 rotor cores, 20 blades, 21 blades, 22 bosses, 23 rings, 30 stators, 30a to 30d stators, 31 stator cores, 32 teeth, 32a U-phase teeth, 32b V-phase teeth, 32c W-phase teeth, 33 auxiliary teeth, 34 fixing holes, 40 motor, 50 housing, 50a-50c housing, 51 steps, 100-105 fan motor, 110 housing, 111 inlet, 112 grill, 113 filter, 114 heat Exchanger, 114a Front side heat exchanger, 114b Back side heat exchanger, 115 outlet, 200 Indoor unit (air conditioner).

Fan motor according to the present invention, and the blade portion, is disposed with a gap rotor, and the outer periphery of the rotor provided on the outer peripheral portion of the blade part, the three-phase having a stator teeth on the inner peripheral surface is provided In a fan motor having a motor and a housing arranged to cover the outer peripheral side of the stator and the rotor, the housing is polygonal, and the stator is arranged at two or more corners of the housing for every three phases. Auxiliary teeth are provided at all end portions of the stator.

Claims (11)

The wings,
A rotor provided on the outer peripheral portion of the blade portion, and a motor having a stator disposed on the outer peripheral side of the rotor via a gap and provided with teeth on the inner peripheral surface;
A housing disposed so as to cover the outer peripheral side of the stator and the rotor;
In the fan motor with
The housing has a polygonal shape;
The stator is disposed at at least one corner of the housing;
A part or all of the stator is provided with an auxiliary tooth at an end thereof.   The fan motor according to claim 1, wherein the stator is provided at at least two corners of the housing.   3. The fan motor according to claim 2, wherein at least two of the stators provided with the auxiliary teeth at an end thereof are provided with an auxiliary tooth at one end thereof. 4.   2. The fan motor according to claim 1, wherein at least one of the stators provided with the auxiliary teeth at end portions thereof is provided with auxiliary teeth at both end portions. Comprising at least two stators;
The fan motor according to claim 1, wherein at least two of the stators are provided at opposite corners. At least two of the stators provided with auxiliary teeth at one end have the same shape,
Some of these stators
The fan motor according to claim 3, wherein the fan motor is provided at a corner portion of the housing opposite to the front and back sides. The stator is
The fan motor according to claim 1, wherein the fan motor is fixed in contact with two side portions adjacent to a corner portion of the housing. The stator provided with the auxiliary teeth includes a plurality of the teeth,
The slot opening width between the auxiliary teeth and the teeth adjacent to the auxiliary teeth is:
The fan motor according to claim 1, wherein the fan motor has the same slot opening width between the plurality of teeth.   The fan motor according to claim 1, wherein the motor is a three-phase motor. The motor is a three-phase motor;
A plurality of the stators having a plurality of teeth around which coils of each phase are wound,
The fan motor according to claim 1, wherein in-phase coils provided in different stators are connected in series. A housing formed with a suction port for sucking indoor air into the interior and a blowout port for supplying conditioned air to the air-conditioning target area;
The fan motor according to any one of claims 1 to 10, housed in the housing,
An air conditioner, comprising: a heat exchanger disposed in an air path from the suction port to the fan motor, wherein the indoor air is heat-exchanged to form the conditioned air.

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