JP5456170B2 - Fan motor and air conditioner equipped with the same - Google Patents

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 mainly an outer rotor type, and a blade portion is provided on the rotor side (rotation side). For this reason, when a motor is enlarged, the magnitude | size of the blade | wing arrange | positioned on the outer side of a motor will be restrict | limited, and the ventilation path will be 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.

  In order to solve these problems, for example, “a radial sleeve bearing 21 a and a thrust rolling bearing 21 b are arranged on the stator substrate 20 in the vertical direction, and the bearing portion 21 is rotatably supported by the bearing portion 21. A rotating main portion having a blade portion 23 integral with the rotating shaft 22 and an annular magnet 24 having 16 poles of driving magnetic poles in the outer peripheral direction of the blade portion 23 are fixed. Are formed of a synthetic resin or the like, and are formed on the stator substrate 20 with three magnets facing the magnet 24 at a predetermined interval. An armature portion 27 including a laminated armature core 25 formed in an E shape from the teeth and an armature coil 26 wound around each tooth is concentratedly arranged. For example a fan motor that Patent Document 1) has been proposed. 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 close to the rotating shaft. 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.

JP-A-8-298763 (paragraphs 0010 and 0012, FIG. 1)

  However, although such a fan motor (see, for example, Patent Document 1) can reduce the boss portion, since the stator is arranged as a set of U phase, V phase, and W phase on a part of the outer periphery of the fan, both ends of the stator are arranged. There is a problem that the magnetic resistance of the phase arranged at the center is smaller than that of the phase arranged at the center (tooth), resulting in magnetic imbalance. In addition, such a fan motor (see, for example, Patent Document 1) causes an imbalance of electromagnetic excitation force between the stator and the rotor, which does not occur in a general motor configuration in which the stator is disposed around the entire periphery of the rotor. There was a problem. For this reason, such a fan motor (for example, refer patent document 1) had the problem that torque ripple, noise, vibration, etc. will increase, and the problem that the efficiency of a fan motor will fall.

  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 eliminating the magnetic imbalance between the phases. The purpose is to obtain an air conditioner.

A fan motor according to the present invention has a three-phase structure including a blade portion, a rotor provided on the outer peripheral portion of the blade portion, and a stator that is disposed on the outer peripheral side of the rotor via a gap and that is provided with teeth on the inner peripheral surface. A fan motor comprising a motor and a housing arranged so as to cover the outer peripheral side of the stator and the rotor , wherein the stator is arranged to face a part of the outer periphery of the rotor, and is provided in the stator Holes for increasing the magnetic resistance are formed on both sides of the base of the tooth having the lower magnetic resistance among the teeth .

  In addition, the air conditioner according to the present invention includes 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, and the above-described housing housed in the housing. The fan motor and a heat exchanger housed in a housing and exchanging heat from indoor air to obtain conditioned air are provided.

  In the present invention, since the magnetic resistance of the teeth having low magnetic resistance is increased, the magnetic resistance between the three phases can be balanced. Since the means for balancing the magnetic resistance can be implemented for each stator, it is also possible to use in-phase coils of a plurality of stators connected in parallel.

It is an external appearance perspective view which shows the fan motor which concerns on Embodiment 1 of this invention. It is an assembly perspective view of the fan motor concerning 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 front view which shows the stator which concerns on Embodiment 2 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 the stator which concerns on Embodiment 4 of this invention. It is a front view which shows the stator which concerns on Embodiment 5 of this invention. It is a front view which shows the stator 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 showing the fan motor. FIG. 3 is a front view showing the stator of the fan motor.

  The fan motor 100 has an axial fan structure, and includes a motor 40 including a blade portion 20, a rotor 10, and a stator portion 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 is not only a resin material, but if it is a material which can ensure the rigidity which does not deform | transform by magnetic attractive force (magnetic attractive force between the rotor 10 and the stator part 30), air resistance, etc. Good. 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. In addition, the magnet 11 may have a segment shape separated for each pole, or may have a substantially annular shape in which the poles are not magnetized.

  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 set to 10 mm, for example, and is matched with the axial width of the stator portion 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 into 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 20 is used while being rotated 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). For example, the magnet 11 (which may include the rotor core 12) may be embedded using a resin material that forms the blade portion 20 without being limited to the segment shape (two-color molding or the like). Further, for example, the axial width of the magnet 11 may be made larger than the axial width of the stator portion 30 to cause overhang. Thereby, the magnetic flux leakage from the axial direction edge part of the stator part 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 employed 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. In addition, when the rotor 10 is deformed due to insufficient rigidity of the rotor 10 and noise is generated, it is preferable to reinforce by providing the rotor core 12.

  As shown in FIG. 3, the stator unit 30 includes a plurality of stators 30a (two in the first embodiment). Each stator 30a includes a stator core 31 whose outer peripheral surface is substantially L-shaped. The angle formed by the outer peripheral surface of the stator core 31 is substantially the same angle (approximately 90 °) as the corner of the housing 50 to which the stator 30a 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. That is, the stator core 31 is formed by a substantially L-shaped core back 31a and teeth 32 (U-phase teeth 32a, V-phase teeth 32b, and W-phase teeth 32c).

  A coil (not shown) is wound around the U-phase teeth 32a, the V-phase teeth 32b, and the W-phase teeth 32c. Further, auxiliary teeth 33 are provided on both inner ends of the stator core 31 on the inner peripheral surface side. Thereby, when the U-phase teeth 32a and the W-phase teeth 32c are energized, a magnetic circuit via the auxiliary teeth 33 is newly added. For this reason, 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. Although the motor can be configured without the auxiliary teeth 33, the provision of the auxiliary teeth 33 can further suppress cogging and the like. As with the rotor core 12, the stator 30a is formed by laminating electromagnetic steel sheets into the shape shown in FIG. 3 by wire cutting or the like. The stator 30a may be formed of a thick iron core or other magnetic material.

  These stators 30 a 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 portion 30). When attaching the stator 30 a to the corner of the housing 50, the outer peripheral surface of the stator core 31 is brought into contact with (in contact with) the corner of the housing 50 (more specifically, both side surfaces adjacent to the corner). Further, the back surface of the stator core 31 is brought into contact (contacted) with the step portion 51 of the housing 50. As a result, the stator 30 a is positioned at the corner of the housing 50. In this state, a screw or the like (not shown) is inserted from the fixing hole 34 to fix the stator 30 a to the corner of the housing 50.

  In a state where the stator 30a 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. When the stator 30a is fixed to the corner of the housing 50, the q axis of the rotor 10 is aligned with the center of the V-phase teeth 32b of both stators 30a. In other words, both stators 30a are arranged at positions separated by an integral multiple of 360 ° in electrical angle.

The position where the stator 30a is provided is not limited to the position shown in the first embodiment. For example, the stator 30 a may be provided at one corner of the housing 50. Further, for example, the stator 30 a may be provided at three corners of the housing 50. Further, for example, the stator 30a may be provided at all corners (four locations) of the housing 50.
In the first embodiment, the stator 30 a is provided at the opposite corner of the housing 50 in order to balance the magnetic attractive force generated between the rotor 10 and the stator portion 30. That is, in the first embodiment, both the stators 30a are arranged symmetrically with respect to the rotation axis of the blade portion 20 (that is, the rotation axis of the rotor 10). By providing the stator 30a at the opposite corners of the housing 50, torque ripple of the motor 40, vibration when the blade part 20 rotates, noise generated when the blade part 20 rotates, and the like can be suppressed.

  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 (rotation direction of the rotor 10) as in the first embodiment, the U-phase-V phase and the V-phase-W Since the teeth 32 are adjacent to each other between the phases, 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 flux linkage between the U-phase teeth 32a and the W-phase teeth 32c and the flux linkage between the V-phase teeth 32b.

  Therefore, in the first embodiment, a substantially triangular hole 35 is formed in the core back 31a near the base of the V-phase tooth 32b. By forming this hole 35, the magnetic resistance between the V-phase teeth 32b and the U-phase teeth 32a and between the V-phase teeth 32b and the W-phase teeth 32c is increased, and the magnetic force between the U-phase teeth 32a and the W-phase teeth 32c is increased. Can be equivalent to resistance. Although the hole 35 is formed in a substantially triangular shape in the first embodiment, the shape of the hole 35 may be an arbitrary shape. In the first embodiment, the fixing hole 34 is formed as a hole for fixing the stator 32 a to the housing 50. However, the hole 35 may be used as a hole for fixing the stator 32 a to the housing 50. Good. Since the hole 35 is also used as a fixing hole in this manner, the shape of the stator 30a can be simplified, and the cost of the stator 30a can be reduced.

  As described above, by making the magnetic resistances of the respective phases (each tooth 32) the same as described above, the magnetic imbalance between the respective phases can be eliminated. At that time, since a means for reducing the cross-sectional area of the U-phase teeth 32a and the W-phase teeth 32c is not used, a value corresponding to the original magnetic resistance can be secured.

  Although the slot combination of the motor 40 (the rotor 10 and the stator unit 30) is not shown in the first embodiment, 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. As a motor driving method, a general motor driving method such as vector control or 120 ° energization can be applied. Sensorless driving is possible, but if necessary, driving with a sensor with a position sensor such as a Hall IC is also possible.

Embodiment 2. FIG.
In the first embodiment, the magnetic imbalance between the phases is eliminated by forming the holes 35. However, even if the stator is formed as follows, the magnetic imbalance between the phases can be eliminated. . The fan motor 100 according to the second embodiment is different from the fan motor 100 according to the first embodiment only in the shape of the stator. For this reason, items not particularly described are the same as those in the first embodiment.

FIG. 4 is a front view showing a stator according to Embodiment 2 of the present invention.
In the stator 30b according to the second embodiment, a hole is formed in the core back near the root of the V-phase teeth 32b, as in the first embodiment. However, the stator 30b according to the second embodiment has two holes (hole 36 and hole 37). These holes 36 and 37 are disposed at two corners of the connecting portion between the V-phase teeth 32b and the core back 31a (in other words, both sides near the root of the V-phase teeth 32b). Since the magnetic flux flowing through the V-phase teeth 32b passes through the U-phase teeth 32a or the W-phase teeth 32c, a large amount of magnetic flux flows in the vicinity of the two corners of the connection portion between the V-phase teeth 32b and the core back 31a. By arranging the holes 36 and 37 there to prevent the flow of magnetic flux, the magnetic resistance between the V-phase teeth 32b and the U-phase teeth 32a and between the V-phase teeth 32b and the W-phase teeth 32c is effectively increased. can do.

  As described above, by forming the stator 32b as in the second embodiment, the magnetic resistance between the V-phase teeth 32b and the U-phase teeth 32a and between the V-phase teeth 32b and the W-phase teeth 32c is also reduced to the U-phase teeth 32a-W. The magnetic resistance between the phase teeth 32c can be made equal, and the magnetic imbalance between the phases can be eliminated.

Embodiment 3 FIG.
Further, for example, even if the stator is formed as follows, it is possible to eliminate the magnetic imbalance between the phases. The fan motor 100 according to the third embodiment is different from the fan motor 100 according to the first embodiment only in the shape of the stator. For this reason, items not particularly described are the same as those in the first embodiment.

FIG. 5 is a front view showing a stator according to Embodiment 3 of the present invention.
In the stator 30c according to the third embodiment, the root of the V-phase teeth 32b and the caulking portion 38 near the core back connection portion are caulked. Since the caulking portion does not easily flow the magnetic flux, the same effect as that obtained when the hole (for example, the hole 35 of the first embodiment) is formed. For this reason, as in the first embodiment, the magnetic resistance between the V-phase teeth 32b and the U-phase teeth 32a and between the V-phase teeth 32b and the W-phase teeth 32c is equal to the magnetic resistance between the U-phase teeth 32a and the W-phase teeth 32c. It can be made equivalent, and the magnetic imbalance between each phase can be eliminated. In addition, the location to which caulking is applied is not limited to one location. When the change in magnetic resistance due to caulking is small, caulking may be applied to a plurality of locations to enhance the effect of increasing the magnetic resistance. Further, by using caulking instead of holes, the adhesive strength of the electromagnetic steel sheet can be improved at the same time.

Embodiment 4 FIG.
Further, for example, even if the stator is formed as follows, it is possible to eliminate the magnetic imbalance between the phases. The fan motor 100 according to the fourth embodiment is different from the fan motor 100 according to the first embodiment only in the shape of the stator. For this reason, items not particularly described are the same as those in the first embodiment.

FIG. 6 is a front view showing a stator according to Embodiment 4 of the present invention.
In stator 30d according to the fourth embodiment, tip width A of V-phase teeth 32b is narrower than tip width B of U-phase teeth 32a and W-phase teeth. As a result, the short-pitch winding coefficient (that is, the winding coefficient) is reduced only for the V phase. For this reason, there exists an effect similar to the magnetic resistance of V phase teeth 32b becoming large, and a magnetic imbalance can be eliminated. Further, by thinning the tip of the V-phase tooth 32b as in the stator 30d according to the fourth embodiment, there is an effect that the coil can be easily wound around the V-phase tooth 32b. Further, since fine adjustment such as cutting the tip of the V-phase teeth 32b can be performed while looking at the characteristics after the stator 30d is completed, an effect that it is easy to cope with individual variations of each stator 30d can be obtained.

Embodiment 5 FIG.
Further, for example, even if the stator is formed as follows, it is possible to eliminate the magnetic imbalance between the phases. The fan motor 100 according to the fifth embodiment is different from the fan motor 100 according to the first embodiment only in the shape of the stator. For this reason, items not particularly described are the same as those in the first embodiment.

FIG. 7 is a front view showing a stator according to Embodiment 5 of the present invention.
In the stator 30e according to the fifth embodiment, the radius of the tip of the V-phase teeth 32b is larger than the radius of the tips of the U-phase teeth 32a and the W-phase teeth 32c by C shown in FIG. That is, the gap formed between the V-phase teeth 32b and the rotor 10 is larger than the gap formed between the U-phase teeth 32a and the W-phase teeth 32c and the rotor 10 by C shown in FIG. Yes. Thereby, the magnetic resistance of the V-phase teeth 32b is increased, and the magnetic imbalance between the phases can be eliminated.

Embodiment 6 FIG.
Further, for example, even if the stator is formed as follows, it is possible to eliminate the magnetic imbalance between the phases. The fan motor 100 according to the sixth embodiment is different from the fan motor 100 according to the first embodiment only in the shape of the stator. For this reason, items not particularly described are the same as those in the first embodiment.

FIG. 8 is a front view showing a stator according to Embodiment 6 of the present invention.
In the stator 30f according to the sixth embodiment, the length of the V-phase teeth 32b is longer than that of the U-phase teeth 32a and the W-phase teeth 32c. Thereby, the magnetic resistance of the V-phase teeth 32b is increased, and the magnetic imbalance between the phases can be eliminated.
The length of the V-phase teeth 32b is, for example, the magnetic resistance between the V-phase teeth 32b and the U-phase teeth 32a, the magnetic resistance between the V-phase teeth 32b and the W-phase teeth 32c, and the U-phase teeth 32a-W-phase teeth. What is necessary is just to adjust so that the magnetic resistance between 32c may become substantially the same.

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

FIG. 9 is a longitudinal sectional view showing an example of an air conditioner according to Embodiment 7 of the present invention. FIG. 9 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. 9 shows the left side of the drawing as the front side of the indoor unit 200. Based on FIG. 9, the configuration of the indoor unit 200 will be described.
Of course, the fan motor shown in the second to fourth 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 indoor air from the suction port 111 and blows conditioned air from the blower outlet 115, and the air path from the suction port 111 to the fan motor 100, and exchanges heat between the refrigerant and the indoor 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 orthogonal to the paper surface. 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 air volume etc. which are requested | required.

  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 reduced in thickness as compared with a conventional fan motor in which a motor is connected to a boss of a blade portion and a conventional fan motor in which a stator is disposed in the entire outer peripheral portion of the blade portion, and the area of the blade 21 is increased. can do. 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.

  Moreover, in the indoor unit 200 (air conditioner) configured as described above, the fan motor 100 shown in the first embodiment is used. For this reason, compared with the indoor unit which mounts the conventional fan motor by which the stator was provided in a part of outer peripheral part of the blade | wing part, a noise, a vibration, etc. can be prevented.

  In the seventh embodiment, the fan motor 100 is disposed on the leeward side of the heat exchanger 114, but the fan motor 100 may be disposed on the leeward side of the heat exchanger 114.

  10 rotor, 11 magnet, 12 rotor core, 20 blade part, 21 blade, 22 boss part, 23 ring, 30 stator part, 30a-30f stator, 31 stator core, 31a core back, 32 teeth, 32a U-phase tooth, 32b V-phase Teeth, 32c W-phase teeth, 33 Auxiliary teeth, 34 Fixing holes, 35 holes, 36 holes, 37 holes, 38 Caulking section, 40 Motor, 50 Housing, 100 Fan motor, 110 Housing, 111 Inlet, 112 Grill, 113 filter, 114 heat exchanger, 114a front side heat exchanger, 114b back side heat exchanger, 115 air outlet, 200 indoor unit (air conditioner).

Claims (4)

The wings,
A rotor provided on the outer peripheral portion of the blade portion, and a three-phase 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 stator is
Arranged to face part of the outer periphery of the rotor,
A fan motor, wherein holes for increasing the magnetic resistance are formed on both sides of the teeth having a lower magnetic resistance among the teeth provided in the stator. Comprising at least two stators;
The fan motor according to claim 1, wherein the stators are arranged symmetrically with respect to the rotation axis of the blade portion. The fan motor according to claim 1 , wherein auxiliary teeth are provided at an end of the stator. 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 3 , housed in the housing,
A heat exchanger housed in the housing, and heat-exchanging the indoor air to form the conditioned air;
An air conditioner characterized by comprising:

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