Patent Application
20240146167
The present disclosure relates to a motor, a fan apparatus, and a refrigeration apparatus.
For example, a motor including a rotary shaft having a hollow structure is known (see Patent Document 1).
However, in the case of an outer rotor type claw-pole motor as described in Patent Document 1, it is not possible to enhance the heat radiation effect of a stator arranged outside the rotary shaft in the radial direction only by making the rotary shaft of the rotor have a hollow structure.
An object of the present disclosure is to provide a technology for improving the cooling performance of an outer rotor type claw-pole motor.
In an embodiment according to the present disclosure, there is provided
According to the present embodiment, a technology for improving the cooling performance of an outer rotor type claw-pole motor can be provided.
Further, in the above embodiment, the motor may include
Thus, according to the present embodiment, foreign matter can be prevented from entering into the space where the rotor and the stator face each other.
Further, in the above embodiment,
Thus, according to the present embodiment, the heat radiation effect of heat generated by each of the three or more stator units can be enhanced.
Further, in the above embodiment, the motor may include
Thus, according to the present embodiment, heat in the inner space of the stator can be radiated to the outside of the stator through the hole of the rotary shaft.
Further, in the above embodiment,
Thus, according to the present embodiment, heat in the inner space of the stator can be radiated to the external space through the hole and the opening of the rotary shaft.
Further, in the above embodiment,
Thus, according to the present embodiment, heat in the inner space of the stator can be radiated to the external space through the opening of the rotary shaft.
Further, in the above embodiment, the motor may further include
Thus, according to the present embodiment, the heat radiation property can be enhanced by increasing the flow rate of gas flowing in the inner space of the stator.
Further, in the above embodiment, the motor may further include
Thus, according to the present embodiment, the heat radiation property can be enhanced by enlarging the surface area of the inner peripheral surface facing the inner space of the stator.
Further, in the above embodiment, the motor may further include
Thus, according to the present embodiment, heat in the inner space of the stator can be radiated to the external space through the respective openings of the fixing member and the case.
Further, in the above embodiment, the motor may further include
Thus, according to the present embodiment, heat in the inner space of the stator can be radiated to the external space through the opening of the fixing member.
Further, in the above embodiment,
Thus, according to the present embodiment, the heat of the core, which is liable to rise in temperature due to the use of the compacted body, can be radiated to the external space through the inner space of the stator.
Further, in an embodiment according to the present disclosure, there is provided
According to the present embodiment, the cooling performance of an outer rotor type claw-pole motor used for the fan apparatus can be improved.
Further, in an embodiment according to the present disclosure, there is provided
According to the present embodiment, the cooling performance of an outer rotor type claw-pole motor used for the fan apparatus included in the refrigeration apparatus can be improved.
Embodiments will be described below with reference to the drawings.
First, the basic configuration of a motor 1 according to the present embodiment will be described with reference to
The motor 1 illustrated in
As illustrated in
As illustrated in
The rotor core 11 has, for example, a substantially cylindrical shape and is arranged so that the rotation axis AX of the motor 1 and the cylindrical axis are substantially coincident. The rotor core 11 has a length substantially equivalent to that of the stator 20 in the axial direction of the motor 1 (hereinafter, simply “axial direction”). The rotor core 11 is formed of, for example, a steel plate, cast iron, or a compacted magnetic core. In the example illustrated in
The plurality of (in this example, 20 units) permanent magnets 12 are arranged at equal intervals in the circumferential direction on the inner peripheral surface of the rotor core 11. Each of the plurality of permanent magnets 12 is formed so as to exist between substantially one end and substantially the other end of the rotor core 11 in the axial direction. The permanent magnets 12 are, for example, neodymium sintered magnets or ferrite magnets.
Each of the plurality of permanent magnets 12 is magnetized with different magnetic poles at either end in the radial direction. The two permanent magnets 12 adjacent to each other in the circumferential direction, among the plurality of permanent magnets 12, are magnetized with different magnetic poles from each other, on the inside in the radial direction facing the stator 20. Therefore, the permanent magnets 12 magnetized with N poles on the inside in the radial direction and the permanent magnets 12 magnetized with S poles on the inside in the radial direction, are alternately arranged in the circumferential direction, outside the radial direction of the stator 20.
Each of the plurality of permanent magnets 12 may be formed of one magnet member in the axial direction, or a plurality of magnet members divided in the axial direction (for example, three corresponding to the number of members of the rotor core 11 to be stacked). In this case, the plurality of magnet members forming the permanent magnet 12 divided in the axial direction are all magnetized with the same magnetic pole on the inside in the radial direction facing the stator 20.
The plurality of permanent magnets 12 arranged in the circumferential direction may be replaced with a permanent magnet formed of one member in the circumferential direction, for example, an annular ring magnet or a plastic magnet that is magnetized with different magnetic poles alternately in the circumferential direction. In this case, the permanent magnet formed of one member in the circumferential direction may be formed of one member also in the axial direction, and may be formed of one member as a whole. The permanent magnet formed of one member in the circumferential direction may be divided into a plurality of members in the axial direction as in the case of the plurality of permanent magnets 12. When a plastic magnet formed of one member in the circumferential direction is adopted, the rotor core 11 may be omitted.
The rotary shaft member 13 has a substantially cylindrical shape, for example, and is arranged so that the rotation axis AX of the motor 1 and the cylindrical shaft center are substantially coincident. The rotary shaft member 13 is rotatably supported by bearings 25 and 26 (see
The coupling member 14 has, for example, a substantially circular disk shape that closes the open end of the substantially cylindrical shape of the rotor core 11. Thus, the rotor core 11 and the plurality of permanent magnets 12 fixed to the inner peripheral surface of the rotor core 11 can rotate about the rotation axis AX of the motor 1 with respect to the fixing member 30 in accordance with the rotation of the rotary shaft member 13.
As illustrated in
As illustrated in
The two stator cores 211 are provided so as to surround the winding wire 212. The stator cores 211 are formed of, for example, compacted magnetic cores. The stator core 211 includes a yoke portion 211A, a plurality of claw magnetic poles 211B, a yoke portion 211C, and an insertion hole 211D. The pair of stator cores 211 is sometimes referred to as “stator cores” (as represented by Japanese katakana characters).
The yoke portion 211A has an annular shape as viewed in a axial direction and a predetermined thickness in the axial direction.
The plurality of claw magnetic poles 211B are arranged at equal intervals in the circumferential direction on the outer peripheral surface of the yoke portion 211A, and each of the claw magnetic poles 211B protrudes radially outward from the outer peripheral surface of the yoke portion 211A. The claw magnetic poles 211B include a claw magnetic pole portion 211B1 and a claw magnetic pole portion 211B2.
The claw magnetic pole portion 211B1 has a predetermined width and protrudes from the outer peripheral surface of the yoke portion 211A by a predetermined length.
The claw magnetic pole portion 211B2 projects from the tip of the claw magnetic pole portion 211B1 toward the other one of the two stator cores 211 by a predetermined length in the axial direction. For example, as illustrated in
The yoke portion 211C is configured such that a portion near the inner peripheral surface of the yoke portion 211A projects toward the other one of the two stator cores 211 by a predetermined amount, and has, for example, an annular shape having an outer diameter smaller than that of the yoke portion 211A as viewed in the axial direction. Therefore, the two stator cores 211 come into contact with each other at the yoke portion 211C, and a space for accommodating the winding wire 212 is created between the two yoke portions 211A corresponding to the two stator cores 211.
The insertion member 24 is inserted into the insertion hole 211D. The insertion hole 211D is realized by the inner peripheral surfaces of the yoke portion 211A and the yoke portion 211C.
The winding wire 212 is annularly wound in the axial view. One end of the winding wire 212 is electrically connected to an external terminal, and the other end is electrically connected to a neutral point. The winding wire 212 is arranged between the two stator cores 211 (the yoke portions 211A) in the axial direction. The winding wire 212 is wound so that the inner peripheral part is radially outward from the yoke portion 211C of the pair of stator cores 211. The winding wire 212 is sometimes referred to as a “coil”.
As illustrated in
As illustrated in
The motor 1 may be driven by a two-phase armature current or by an armature current of four or more phases.
The interphase member 22 is provided between axially adjacent stator units 21 of different phases. The interphase member 22 is, for example, a nonmagnetic material. Thus, a predetermined distance can be secured between the two stator units 21 of different phases, and magnetic flux leakage between the two stator units 21 of different phases can be prevented. The interphase member 22 includes a UV interphase member 22A and a VW interphase member 22B.
The UV interphase member 22A is provided between the stator unit 21A of the U phase and the stator unit 21B of the V phase, which are adjacent in the axial direction. The UV interphase member 22A has, for example, a substantially cylindrical shape (substantially circular plate shape) having a predetermined thickness, and an insertion hole through which the insertion member 24 is inserted is formed in the center portion. The same may apply to the VW interphase member 22B.
The VW interphase member 22B is provided between the stator unit 21B of the V phase and the stator unit 21C of the W phase, which are adjacent in the axial direction.
The end member 23 is provided at an end part on the leading end side of the motor 1 including the plurality of stator units 21 that are stacked. Specifically, the end member 23 is provided so as to contact an edge face of the stator unit 21A, on the side opposite to the side facing the stator unit 21B in the axial direction. The end member 23 has, for example, a substantially cylindrical shape (substantially circular plate shape) having a predetermined thickness, and an insertion hole through which the insertion member 24 is inserted is formed in the center portion. The end member 23 is, for example, a nonmagnetic material. Thus, magnetic flux leakage from the stator unit 21A (specifically, the stator core 211 on the leading end side of the motor 1) can be prevented.
In the insertion member 24, the end member 23, the stator unit 21A, the UV interphase member 22A, the stator unit 21B, the VW interphase member 22B, and the stator unit 21C are inserted in order from the leading end side of the motor 1, and the leading end is fixed to the fixing member 30. The insertion member 24 has, for example, a male screw portion at the leading end and is fixed to the fixing member 30 by being fastened to the corresponding female screw portion of the fixing member 30.
The insertion member 24 has, for example, a substantially cylindrical shape, and the rotary shaft member 13 is rotatably arranged in the hole portion realized by the inner peripheral surface. The bearings 25 and 26 rotatably supporting the rotary shaft member 13 are provided at both ends of the insertion member 24 in the axial direction.
The insertion member 24 has a head having an outer diameter relatively larger than the inner diameter of the insertion hole 211D of the stator unit 21 at the leading end of the motor 1. Thus, for example, the insertion member 24 is tightened to a certain extent to the fixing member 30, so that a force in the direction from the head toward the fixing member 30 in the axial direction can be applied to the end member 23. Therefore, the plurality of the stator units 21 (the stator units 21A to 21C) and the interphase member 22 (the UV interphase member 22A, the VW interphase member 225) can be fixed to the fixing member 30 in the form of being sandwiched between the end member 23 and the fixing member 30. The strength of the compacted magnetic core is relatively low against tensile stress, while the strength against compressive stress is relatively high. Therefore, with the compressive stress being applied to the stator core 211 formed by the compacted magnetic core, the stator units 21A to 21C can be fixed to the fixing member 30.
The fixing member 30 has, for example, a substantially disk shape having an outer diameter larger than that of the rotor 10 (the rotor core 11) in the axial direction, and has a predetermined thickness in the axial direction. As illustrated in
Next, a structure unique to the motor 1 according to the first embodiment will be described with reference to
As illustrated in
The rotary shaft member 13 of the rotor 10 is arranged in the inner space 24A. Both ends of the rotary shaft member 13 in the axial direction are rotatably supported by the bearings 25 and 26 (both are examples of “one support member”) provided at both ends of the insertion member 24 in the axial direction. In the motor 1 according to the first embodiment, the inner space 24A of the insertion member 24 is in communication with the outside of the rotor 10.
Specifically, the rotary shaft member 13 arranged in the inner space 24A has a hollow structure. That is, the rotary shaft member 13 has an inner space 13A around the rotation axis AX.
The end of the rotary shaft member 13 on the side of the coupling member 14 has a hole 13B in communication with the outside of the rotor 10 and the inner space 13A.
A plurality of through holes 13C in communication with the inner side (the inner space 13A) and the outside (the inner space 24A) of the rotary shaft member 13, are formed in the wall portion of the rotary shaft member 13.
Thus, in the motor 1 according to the first embodiment, the inner space 24A is in communication with the outside of the rotor 10 through the through holes 13C, the inner space 13A, and the hole 13B of the rotary shaft member 13.
Therefore, in the motor 1 according to the first embodiment, as illustrated in
In particular, the motor 1 according to the first embodiment is an outer rotor type claw-pole motor, and because the winding wire 212 is surrounded by the stator cores 211, the heat generated by the winding wire 212 is easily transmitted to the insertion member 24 through the stator cores 211, so that the heat generated by the winding wire 212 can be radiated more efficiently by cooling the insertion member 24.
The end of the rotary shaft member 13 on the side of the fixing member 30 has an opening 13D. The opening 13D is in communication with the external space. Thus, the rotary shaft member 13 is able to discharge the gas, which has been sucked in through the hole 13B and warmed in the inner space 24A by the heat generated by the stator 20, from the opening 13D to the external space. Therefore, the motor 1 according to the first embodiment can efficiently cool the insertion member 24 from the inside.
The motor 1 according to the first embodiment further includes a case 40. The case 40 is fixed, in the axial direction, to the surface on the opposite side to the surface on which the stator 20 of the fixing member 30 is fixed. The case 40 has a cylindrical shape with an outer diameter substantially equal to the outer diameter of the rotor 10. The case 40 has a hollow structure. A drive circuit 44 configured to supply power to the winding wire 212 is arranged inside the case 40. An opening 42 piercing the case 40 in the axial direction is formed in the central portion (around the rotation axis AX) of the case 40. The opening 42 is in communication with the opening 13D of the rotary shaft member 13. The inner diameter of the opening 42 is larger than that of the opening 13D of the rotary shaft member 13. Thus, the opening 42 does not prevent gas from being discharged from the opening 13D into the external space. In the motor 1 according to the first embodiment, gas flows through the opening 42, thereby cooling the case 40 and the drive circuit 44 provided inside the case 40.
In the motor 1 according to the first embodiment, the space where the rotor 10 (the inner peripheral surface of the permanent magnet 12) and the stator 20 (the outer peripheral surface of the stator core 211) face each other, and the inner space 24A of the stator 20, are shielded by the bearings 25 and 26 provided at both ends of the insertion member 24. That is, the bearings 25 and 26 function as “shielding members”. Thus, the motor 1 according to the first embodiment can prevent foreign matter contained in the gas introduced into the inner space 24A, from entering the space where the rotor 10 (the inner peripheral surface of the permanent magnet 12) and the stator 20 (the outer peripheral surface of the stator core 211) face each other, while cooling the insertion member 24 from the inside by the gas introduced into the inner space 24A.
Further, the motor 1 according to the first embodiment has the inner space 24A separated from the stator 20 only by the insertion member 24 capable of heat transfer. That is, the motor 1 according to the first embodiment has no member having high thermal resistance such as a bearing between the inner space 24A and the stator 20. Thus, the motor 1 according to the first embodiment can enhance the heat radiation effect of the stator 20 according to the gas flowing in the inner space 24A.
Next, a structure unique to the motor 1 according to the second embodiment will be described with reference to
As illustrated in
Therefore, as illustrated in
Thus, in the motor 1 according to the second embodiment, the inner space 24A is directly in communication with the outside of the rotor 10 through the hole 13B of the rotary shaft member 13.
Therefore, in the motor 1 according to the second embodiment, the gas sucked in through the hole 13B of the rotary shaft member 13 flows through the inner space 24A while directly contacting the inner peripheral surface facing the inner space 24A of the insertion member 24, so that the insertion member 24 can be cooled directly from the inside.
Further, in the motor 1 according to the second embodiment, the bearing 26 is not provided at the end of the insertion member 24 on the side of the fixing member 30, and the motor 1 has the opening 24B at the end, and the inner diameter of the opening 24B and the inner diameter of the opening 42 of the case 40 are equal to each other, and, therefore, the gas warmed in the inner space 24A by the heat generated by the stator 20 can be efficiently discharged to the external space through the opening 24B and the opening 42.
Next, a structure unique to the motor 1 according to the third embodiment will be described with reference to
As illustrated in
The rotating blade 51 is provided closer to the fixing member 30 than the end of the rotary shaft member 13 on the fixing member 30 side, in the inner space 24A.
The rotary shaft 52 is a rod-shaped member arranged on the rotation axis AX in the inner space 13A of the rotary shaft member 13. The rotating blade 51 is fixed to an end part of the rotary shaft 52 on the side of the fixing member 30.
The base part 53 is a disc-shaped member and is fixed to a central part on the outer surface of the coupling member 14 so that the center thereof is located at the rotation axis AX. The base part 53 rotatably supports an end part of the rotary shaft 52 on the side of the coupling member 14. The base part 53 is arranged so as to cover the hole 13B of the rotary shaft member 13, but has a plurality of openings 53A so as to introduce outside air into the hole 13B.
In the motor 1 according to the third embodiment, outside air is forcibly sucked in through the hole 13B by rotating the fan 50 integrally with the rotor 10, and the outside air is guided to the inner space 24A of the insertion member 24 through the inner space 13A of the rotary shaft member 13. Thus, compared with the motor 1 according to the second embodiment, the motor 1 according to the third embodiment can increase the flow rate of gas flowing through the inner space 24A of the insertion member 24, thereby further enhancing the cooling effect of the stator 20.
Next, a structure unique to the motor 1 according to the fourth embodiment will be described with reference to
As illustrated in
In the example illustrated in
The motor 1 according to the fourth embodiment can expand the surface area of the inner peripheral surface facing the inner space 24A of the insertion member 24, by having the heat radiation fin 60. Therefore, the motor 1 according to the fourth embodiment can enhance the heat radiation effect according to the gas sucked in through the hole 13B and flowing through the inner space 24A, thereby further enhancing the cooling effect of the stator 20.
The heat radiation fin 60 may be integrally formed with the insertion member 24 or may be a separate member from the insertion member 24. The shape, arrangement, and number of the heat radiation fins 60 are not limited to those illustrated in
Next, a structure unique to the motor 1 according to the fifth embodiment will be described with reference to
As illustrated in
Thus, in the motor 1 according to the fifth embodiment, the fan 50 rotates integrally with the rotor 10 so that the outside air is forcibly sucked in through the hole 13B, and the outside air is guided to the inner space 24A of the insertion member 24 through the inner space 13A of the rotary shaft member 13. Thus, the flow rate of gas flowing through the inner space 24A of the insertion member 24 can be increased in the motor 1 according to the fifth embodiment in comparison with the configuration without the fan 50, and thus the cooling effect of the stator 20 can be further enhanced.
Further, the motor 1 according to the fifth embodiment includes the heat radiation fin 60, and, therefore, the surface area of the inner peripheral surface facing the inner space 24A of the insertion member 24 can be enlarged. Therefore, in the motor 1 according to the fifth embodiment, the heat radiation effect can be enhanced according to the gas sucked in through the hole 13B and flowing through the inner space 24A, and thus the cooling effect of the stator 20 can be further enhanced.
Next, a structure unique to the motor 1 according to the sixth embodiment will be described with reference to
As illustrated in
However, as illustrated in
The motor 1 according to the sixth embodiment has a plurality of openings 70, so that the gas sucked in through the holes 13B and warmed by flowing through the inner space 24A can be discharged from each of the plurality of openings 70 to the external space of the fixing member 30. Thus, the motor 1 according to the sixth embodiment makes it difficult for the warmed gas to stay in the inner space 24A, so that the heat radiation effect according to the gas flowing through the inner space 24A can be enhanced.
Next, with reference to
The refrigeration apparatus 400 illustrated in
The cooling unit 420 is provided inside the chamber. The cooling unit 420 includes a usage heat exchanger 421 and an in-chamber fan 422 (an example of a “fan apparatus”). The usage heat exchanger 421 cools the air inside a chamber by a flowing refrigerant supplied from the outdoor unit 410 through a piping 401. The in-chamber fan 422 blows the air cooled by the usage heat exchanger 421 into the chamber by rotating the impeller.
The outdoor unit 410 is provided outside the chamber. The outdoor unit 410 includes a compression device 411, an outdoor heat exchanger 412, and an outdoor fan 413 (an example of a “fan apparatus”). The compression device 411 compresses a refrigerant supplied from the cooling unit 420 through the piping 401. As the refrigerant compressed by the compression device 411 flows, the outdoor heat exchanger 412 releases the heat of the refrigerant to the outside air. The outdoor fan 413 blows the outside air heated by the outdoor heat exchanger 412 by rotating the impeller.
In the refrigeration apparatus 400 according to the present embodiment, the motor 1 of any of the first to sixth embodiments may be used for rotatably driving the impeller provided in the in-chamber fan 422. Thus, the refrigeration apparatus 400 according to the present embodiment can improve the cooling performance of the motor 1 for rotatably driving the impeller provided in the in-chamber fan 422.
In the refrigeration apparatus 400 according to the present embodiment, the motor 1 of any of the first to sixth embodiments may be used for rotatably driving the impeller provided in the outdoor fan 413. Thus, the refrigeration apparatus 400 according to the present embodiment can improve the cooling performance of the motor 1 for rotatably driving the impeller provided in the outdoor fan 413.
Next, the functions of the motor 1 according to the present embodiment will be described.
The motor 1 according to the present embodiment is provided with the rotor 10 rotatably arranged around the rotation axis AX, and the stator 20 having the claw-pole-type stator unit 21 including the winding wire 212 arranged inside the rotor 10 and wound annularly around the rotation axis AX, and the stator cores 211 provided to surround the winding wire 212, and the stator 20 has the inner space 24A which is in communication with the outside of the rotor 10 around the rotation axis AX and is provided across the heat-transferable insertion member 24 from the stator 20, and which can radiate heat to the inner space 24A.
Thus, the motor 1 according to the present embodiment can radiate heat generated by the stator 20 (the winding wire 212) to the outside of the rotor 10 through the inner space 24A. Therefore, the motor 1 according to the present embodiment can improve the cooling performance of the motor 1, which is an outer rotor type claw-pole motor.
The motor 1 according to the present embodiment may have the bearing 25 (shielding member) for shielding the space where the rotor 10 and the stator 20 face each other and the inner space 24A of the stator 20.
Thus, the motor 1 according to the present embodiment can prevent foreign matter contained in the gas introduced into the inner space 24A, from entering the space where the rotor 10 and the stator 20 face each other, with the bearing 25, while cooling the stator 20 by the gas introduced into the inner space 24A.
In the motor 1 according to the present embodiment, the stator 20 may have three or more stator units 21 stacked in the axial direction of the rotation axis AX.
Thus, the motor 1 according to the present embodiment can radiate the heat generated by each of the three or more stator units 21 to the outside of the rotor 10 through the inner space 24A.
Further, the motor 1 according to the present embodiment may have the rotary shaft member 13 which is rotatably configured around the rotation axis AX and rotates integrally with the rotor 10, and the rotary shaft member 13 may have the hole 13B which allows the outside of the rotor 10 to be in communication with the inner space 24A of the stator 20.
Thus, the motor 1 according to the present embodiment can radiate heat generated by the stator 20 (the winding wire 212) to the outside of the rotor 10 through the inner space 24A and the hole 13B of the rotary shaft member 13.
In the motor 1 according to the present embodiment, the rotary shaft member 13 may include the bearing 25 (one supporting member) provided at one end in the axial direction of the rotation axis AX, the hole 13B provided at one end in the axial direction of the rotation axis AX and rotatably supported by the bearing 26 (one supporting member) provided at the other end in the axial direction of the rotation axis AX, and the opening 13D provided at the other end in the axial direction of the rotation axis AX and allowing the inner space 24A of the stator 20 to be in communication with the external space.
Thus, the motor 1 according to the present embodiment can radiate heat generated by the stator 20 (the winding wire 212) to the outside of the rotor 10 through the inner space 24A, the hole 13B of the rotary shaft member 13, and the opening 13D of the rotary shaft member 13.
In the motor 1 according to the present embodiment, the rotary shaft member 13 is rotatably supported by the bearing 25 (one supporting member) provided at one end in the axial direction of the rotation axis AX, and may include the opening 13D provided at the other end in the axial direction of the rotation axis AX allowing the inner space 24A of the stator 20 to be in communication with external space.
Thus, the motor 1 according to the present embodiment can be configured such that no components are arranged in the inner space 24A of the stator 20, and, therefore, gas flowing in the inner space 24A can be directly brought into contact with the inner peripheral surface facing the inner space 24A of the stator 20, and thus the stator 20 can be directly cooled from the inside.
Further, the motor 1 according to the present embodiment may have the fan 50 arranged in the inner space 24A of the stator 20 and rotated integrally with the rotary shaft member 13.
Thus, the motor 1 according to the present embodiment can increase the flow rate of gas flowing in the inner space 24A of the stator 20 by rotating the fan 50 integrally with the rotary shaft member 13, thereby further enhancing the cooling effect of the stator 20.
Further, the motor 1 according to the present embodiment may include the heat radiation fin 60 on the inner peripheral surface facing the inner space 24A of the stator 20.
Thus, the motor 1 according to the present embodiment can expand the surface area of the inner peripheral surface facing the inner space 24A of the stator 20 by the heat radiation fin 60, thereby further enhancing the cooling effect of the stator
Further, the motor 1 according to the present embodiment includes the fixing member 30 for supporting the stator 20 and the case 40 for housing the drive circuit 44 mounted on the fixing member 30, and is configured to supply power to the winding wire 212, and each of the fixing member 30 and the case 40 may have openings 24B and 42 for allowing the inner space 24A of the stator 20 to be in communication with the external space.
Thus, the motor 1 according to the present embodiment can radiate heat generated by the stator 20 (the winding wire 212) to the external space through the inner space 24A, the opening 24B of the fixing member 30, and the opening 42 of the case 40.
Further, the motor 1 according to the present embodiment includes the fixing member 30 for supporting the stator 20 and the case 40 for housing the drive circuit 44 mounted on the fixing member 30, and is configured to supply power to the winding wire 212, and the fixing member 30 may include the opening 70 for allowing the inner space 24A of the stator 20 to be in communication with the external space of the fixing member 30, by penetrating the fixing member 30 in the radial direction of the rotation axis AX.
Thus, the motor 1 according to the present embodiment can radiate heat generated by the stator 20 (the winding wire 212) to the external space through the inner space 24A and the opening 70.
In the motor 1 according to the present embodiment, the stator core 211 of the stator unit 21 may be a compacted body formed by compressing magnetic powder.
Thus, the motor 1 according to the present embodiment can radiate the heat of the stator core 211, which is easily heated by receiving the heat generated by the winding wire 212 by using the compacted body, to the outside of the rotor 10 through the inner space 24A.
Further, the motor 1 according to the present embodiment may be used to rotatably drive the impeller in a fan apparatus equipped with the impeller that rotates to blow air.
Thus, the motor 1 according to the present embodiment can enhance the heat radiation effect of the motor 1 that rotatably drives the impeller in the fan apparatus.
Further, the refrigeration apparatus 400 according to the present embodiment may be provided with the above-mentioned fan apparatus.
Thus, the refrigeration apparatus 400 according to the present embodiment can enhance the heat radiation effect of the motor 1 that rotatably drives the impeller of the fan apparatus device (for example, the outdoor fan 413, the in-chamber fan 422, etc.) provided in the refrigeration apparatus 400.
Although the embodiments have been described above, it will be understood that various changes in modes and details are possible without departing from the purpose and scope of the claims.
In the example illustrated in
In the motor 1 illustrated in
Therefore, in the motor 1 illustrated in
The slit 24C is not limited to a shape extending linearly in the axial direction, and may have other shapes. The slits 24C may be arranged not only in the circumferential direction but also in the axial direction. The slits 24C may also be referred to as “through holes”.
The present international application is based upon and claims priority to Japanese Patent Application No. 2021-054832 filed on Mar. 29, 2021, the entire contents of which are incorporated herein by reference.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2021-054832 | Mar 2021 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2022/014707 | 3/25/2022 | WO |
