Stator core, stator assembly, motor and household appliance

Abstract

The utility model provides a stator iron core, a stator assembly, a motor and a household appliance, the stator iron core comprises a first iron core, the first iron core comprises a first stator yoke part and a plurality of first stator tooth parts, the plurality of first stator tooth parts are arranged on the outer side of the first stator yoke part at intervals along the circumferential direction of the first stator yoke part, and the first stator yoke part encloses a first accommodating cavity; the second iron core is arranged in the first accommodating cavity and comprises a second stator yoke part and a plurality of second stator tooth parts, and the plurality of second stator tooth parts are arranged on the inner side of the second stator yoke part at intervals in the circumferential direction of the second stator yoke part; and a gap is formed between at least part of the outer side wall of the second stator yoke part and the inner side wall of the first stator yoke part. According to the structure, through the gap between the first iron core and the second iron core, magnetic field leakage on the first iron core and the second iron core can be reduced, and magnetic field interference generated when the inner stator and the outer stator work is avoided, so that the magnetic field utilization rate of the first iron core and the second iron core can be improved, and the working efficiency of the motor is improved.

Description

Technical Field

[0001] This application relates to the field of motor technology, and more specifically, to a stator core, stator assembly, motor, and household appliance. Background Technology

[0002] In the relevant scheme, the inner stator and outer stator of the dual-stator motor are either an integral structure or directly connected. Since the inner stator and outer stator are directly connected, there is a magnetic circuit connection between them. At the same time, the inner stator and outer stator will generate magnetic field interference during operation, which will affect the operation of the motor.

[0003] Therefore, how to solve the magnetic circuit interference problem between the inner and outer stators of a dual-stator motor has become an urgent problem to be solved. Utility Model Content

[0004] This application aims to at least solve the problem of magnetic field interference between the inner and outer stators in existing or related technologies when a dual-stator motor is in operation.

[0005] Therefore, the first aspect of this application is to propose a stator core.

[0006] The second aspect of this application is to propose a stator assembly.

[0007] The third aspect of this application is to propose an electric motor.

[0008] The fourth aspect of this application is to propose a household appliance.

[0009] The first aspect of this application provides a stator core, comprising: a first core, the first core including a first stator yoke and a plurality of first stator teeth, the plurality of first stator teeth being spaced apart circumferentially along the first stator yoke, the first stator teeth being disposed on the outer side of the first stator yoke, the first stator yoke forming a first receiving cavity; and a second core disposed within the first receiving cavity, the second core including a second stator yoke and a plurality of second stator teeth, the plurality of second stator teeth being spaced apart circumferentially along the second stator yoke, the second stator teeth being disposed on the inner side of the second stator yoke; wherein, at least a portion of the outer sidewall of the second stator yoke is provided with a gap between it and the inner sidewall of the first stator yoke.

[0010] The stator core proposed in this application includes a first core and a second core. The first core is an outer core, and the second core is an inner core, thus forming a double-core structure. When the stator core is used in a motor, an inner rotor can be arranged inside the inner core, so that the inner stator and inner rotor can form an inner motor. Simultaneously, an outer rotor can be arranged outside the outer core, so that the outer stator and outer rotor can form an outer motor, thus constituting a dual-shaft motor. Both the inner and outer cores include a yoke and teeth. The teeth of the inner core are located inside its yoke, and the teeth of the outer core are located outside its yoke. In use, upper windings can be wound on the teeth of the outer core and the teeth of the inner core respectively to form a double-stator structure with an inner stator and an outer stator.

[0011] In this design, at least a portion of the outer sidewall of the second stator yoke is provided with a gap between it and the inner sidewall of the first stator yoke. That is, the second stator yoke and the first stator yoke are not in complete contact in the radial direction of the stator core, and a gap is formed between them. Through this gap, mutual magnetic leakage between the first and second cores can be avoided, thereby reducing magnetic field leakage on the first and second cores and preventing magnetic field interference between the inner and outer stators during operation. This improves the magnetic field utilization rate of the first and second cores, thereby improving the working efficiency of the motor.

[0012] In any of the above embodiments, optionally, the outer sidewall of the second stator yoke is spaced apart from the inner sidewall of the first stator yoke.

[0013] In this embodiment, the outer sidewall of the second stator yoke is spaced apart from the inner sidewall of the first stator yoke. This can appropriately increase the distance between the second stator yoke and the first stator yoke, thereby minimizing magnetic field interference between the inner and outer stators during operation.

[0014] In any of the above embodiments, optionally, the gap is distributed in a ring shape along the inner sidewall of the first stator yoke.

[0015] In this embodiment, a gap is provided around the entire circumference of the first iron core and the second iron core, meaning that there is no connection between any part of the first iron core and the second iron core. This allows the first iron core and the second iron core to be completely disconnected, preventing magnetic field leakage between the first iron core and the second iron core. This minimizes magnetic field interference between the inner stator and the outer stator, resulting in higher motor efficiency.

[0016] In any of the above embodiments, optionally, the second stator yoke and the first stator yoke are arranged concentrically.

[0017] In this embodiment, the second stator yoke and the first stator yoke are concentrically arranged, that is, the inner stator and the outer stator are concentrically arranged. Of course, in other embodiments, the inner and outer stators can also be eccentrically arranged.

[0018] In any of the above embodiments, optionally, the width of the gap along the radial direction of the second stator yoke is greater than 0 mm and less than or equal to 1 mm.

[0019] In this embodiment, the gap between the first stator yoke and the second stator yoke cannot be too large. If it is too large, the overall volume of the stator core will be too large, resulting in low space utilization of the product. Therefore, the width of the gap can be less than or equal to 1 mm.

[0020] In any of the above embodiments, optionally, the width of the gap along the radial direction of the second stator yoke is greater than or equal to 0.3 mm and less than or equal to 0.7 mm.

[0021] In this embodiment, the width of the gap can be set to about 0.3mm-0.7mm. For example, the gap can be 0.5mm.

[0022] In any of the above embodiments, optionally, a non-magnetic component is provided within the gap.

[0023] In this embodiment, no material may be placed between the first iron core and the second iron core, and the first and second iron cores can be magnetically isolated by the air between them. Of course, in order to connect the first and second iron cores into one unit, a non-magnetic material can be filled between the first and second iron cores to form a non-magnetic component. In this way, magnetic isolation can be achieved between the first and second iron cores while allowing them to be connected into a whole.

[0024] In any of the above embodiments, the first core may optionally include a plurality of first segmented cores.

[0025] In this embodiment, the first iron core, i.e., the outer iron core, can be configured as a block structure. In this case, the first iron core is formed by splicing together multiple first block iron cores. This structure makes it easier to install windings on the first iron core. At the same time, setting the first iron core as a block structure can improve the material utilization rate in the preparation of the first iron core.

[0026] For example, multiple first lamination blocks can be formed by lamination, and then the multiple first lamination blocks can be formed into a first segmented iron core. This method of preparing the first iron core makes the material utilization rate higher, thereby reducing the preparation cost of the stator iron core.

[0027] In any of the above embodiments, optionally, a first protrusion and a first groove are respectively provided on both ends of the first segmented iron core along the radial direction of the first iron core, and two adjacent first segmented iron cores are positioned and engaged through the first protrusion and the first groove.

[0028] In this embodiment, in order to ensure the connection strength and splicing position of multiple first segment iron cores during splicing, a first protrusion and a first groove can be provided at both ends of the first segment iron core. When splicing the first segment iron core, two adjacent first segment iron cores can be aligned and matched through the first protrusion and the first groove to ensure that multiple first segment iron cores can be spliced ​​together to form a first iron core more quickly.

[0029] In any of the above embodiments, optionally, the first iron core further includes a third injection molded part, and multiple first segmented iron cores are connected to form a whole through the third injection molded part.

[0030] In this embodiment, multiple first segmented iron cores can be connected together by injection molding. For example, multiple first segmented iron cores can be placed as inserts in a mold, and then a third injection molded part can be formed in the mold. In this way, multiple first segmented iron cores can be integrally injection molded with the third injection molded part, thereby realizing the splicing between multiple first segmented iron cores.

[0031] In any of the above embodiments, the second core may optionally include a plurality of second segmented cores.

[0032] In this embodiment, the second iron core, i.e., the inner iron core, can be configured as a block structure. In this case, the second iron core is formed by splicing together multiple second block iron cores. This structure makes it easier to set windings on the second iron core. At the same time, setting the second iron core as a block structure can improve the material utilization rate in the preparation of the second iron core.

[0033] For example, multiple second lamination blocks can be formed by lamination, and then the multiple second lamination blocks can be formed into a second segmented iron core. This method of preparing the second iron core makes the material utilization rate higher, thereby reducing the preparation cost of the stator iron core.

[0034] In any of the above embodiments, optionally, the second segmented iron core is provided with a second protrusion and a second groove at both ends of the second iron core along the radial direction of the second iron core, and two adjacent second segmented iron cores are positioned and engaged by the second protrusion and the second groove.

[0035] In this embodiment, in order to ensure the connection strength and splicing position of multiple second segment iron cores during splicing, a second protrusion and a second groove can be provided at both ends of the second segment iron core. When splicing the second segment iron core, two adjacent second segment iron cores can be aligned and cooperated through the second protrusion and the second groove to ensure that multiple second segment iron cores can be spliced ​​to form a second iron core more quickly.

[0036] In any of the above embodiments, the second iron core may optionally include a second injection molded part, and a plurality of first segmented iron cores are connected to form a whole through the second injection molded part.

[0037] In this embodiment, multiple second-section iron cores can be connected together by injection molding. For example, multiple second-section iron cores can be placed as inserts in a mold, and then injection molded in the mold to form a second injection molded part. In this way, multiple second-section iron cores can be integrally injection molded with the second injection molded part, thereby realizing the splicing between multiple second-section iron cores.

[0038] In any of the above embodiments, the stator core may optionally include a first injection molded part, the first core and the second core are connected through the first injection molded part, and the first core, the second core and the first injection molded part are an integral structure.

[0039] In this embodiment, to enable the first and second iron cores to be connected as a whole, the first and second iron cores can be injection molded as inserts to form a first injection molded part. This allows the first and second iron cores to be connected together through the first injection molded part. At this time, the stator iron core is a single injection molded body, thus ensuring the connection strength between the first and second iron cores.

[0040] The first stator yoke has a third protrusion and / or a third groove on its inner side and / or the second stator yoke. When the stator core is connected via the first injection molded part, the injection molded material can fill the third groove, or the third protrusion can form an embedding groove on the first injection molded part. This increases the contact area between the first injection molded part and the first and second cores, thereby improving the connection strength between the first injection molded part and the first and second cores when the stator core is connected via the injection molded part.

[0041] In any of the above embodiments, optionally, the number of first stator teeth is greater than the number of second stator teeth; and / or any two adjacent first stator teeth and first stator yokes form a stator outer slot, and any two adjacent second stator teeth and second stator yokes form a stator inner slot, wherein the number of stator outer slots is greater than the number of stator inner slots.

[0042] In this embodiment, the inner and outer stators have different numbers of teeth and slots, resulting in different pole numbers. This allows for different rotational speeds between the inner and outer rotors, thus meeting the needs of different loads. For example, the outer stator has more slots than the inner stator, enabling the outer stator to achieve low-speed, high-torque operation through its larger number of slots, while the inner stator can achieve high-speed, low-torque operation through its smaller number of slots. This allows the dual-shaft motor to output different speeds, expanding the motor's application scenarios.

[0043] The first iron core and the second iron core are formed by stamping.

[0044] For example, both the first and second iron cores are segmented iron cores. The first iron core is formed by splicing together multiple first segmented iron cores, and the second iron core is formed by splicing together multiple second segmented iron cores. The multiple first and second segmented iron cores are formed by stamping using a die combination. The inner and outer stators are manufactured by stamping using a die combination, which can reduce the die volume, improve material utilization, and lower costs.

[0045] The second aspect of this application provides a stator assembly, including the stator core provided by any of the technical solutions in the first aspect.

[0046] The stator assembly proposed according to the technical solution of this application, since it includes the stator core provided by any of the technical solutions of the first aspect, therefore, it has all the beneficial effects of the stator core provided by any of the technical solutions of the first aspect. Further details will not be elaborated here.

[0047] Furthermore, the stator assembly also includes a first winding wound on a first iron core and a second winding wound on a second iron core. The first winding and the first iron core together form the first stator, and the second winding and the second iron core together form the second stator.

[0048] Furthermore, the number of poles of the first stator is greater than the number of poles of the second stator.

[0049] The third aspect of this application provides an electric motor, including a stator core provided by any of the technical solutions in the first aspect; and / or a stator assembly provided by any of the technical solutions in the second aspect.

[0050] The motor proposed according to the technical solution of this application, since it includes the stator core provided by any of the technical solutions of the first aspect and / or the stator assembly provided by any of the technical solutions of the second aspect, therefore, it has all the beneficial effects of the stator core provided by any of the technical solutions of the first aspect and / or the stator assembly provided by any of the technical solutions of the second aspect. Further details will not be elaborated here.

[0051] Optionally, the motor further includes: a first stator including a first iron core; a second stator including a second iron core disposed on the inner side of the first stator along the radial direction of the first stator; a first rotor, at least a portion of which is disposed on the outer side of the first stator along the radial direction of the first stator and is rotatable under the action of the first stator; and a second rotor, at least a portion of which is disposed on the inner side of the second stator along the radial direction of the second stator and is rotatable under the action of the second stator.

[0052] In this embodiment, the motor includes a first stator and a second stator, as well as a first rotor and a second rotor. The first stator is the outer stator, and the second stator is the inner stator, thus forming a double-stator structure. Simultaneously, a second rotor is disposed inside the second stator (inner stator), forming an inner rotor. The inner stator and inner rotor together form an inner motor. Conversely, a first rotor is disposed outside the first stator (outer stator), forming an outer rotor. This structure, with its inner and outer stators and rotors, constitutes a dual-axis motor. Because the inner and outer stators and rotors are radially stacked, this structure significantly reduces the product's thickness, improves its aesthetics, and lowers production costs.

[0053] In this type of motor, since the first rotor and the second rotor are independent of each other, dual-speed control of a single motor can be achieved.

[0054] Optionally, the first rotor and the second rotor can rotate in the same direction or in opposite directions, so that the rotation direction of the first rotor and the second rotor can be controlled according to different usage requirements.

[0055] In any of the above embodiments, optionally, the rotational speed of the first rotor is less than the rotational speed of the second rotor.

[0056] In this embodiment, the diameter of the first fan blade is larger than that of the second fan blade. At the same rotational speed, the air delivery capacity of the first fan blade is much greater than that of the second fan blade. This causes the strong winds from both sides to diffuse towards the center, increasing wind resistance and reducing air delivery efficiency. This application sets the rotational speed of the first rotor to be less than that of the second rotor, which is equivalent to increasing the air delivery capacity of the second fan blade, thus ensuring that the air delivery intensity is the same in the middle and on the outer sides, thereby reducing wind resistance and improving air delivery efficiency. Of course, depending on different needs, the rotational speed of the first rotor can also be greater than or equal to the rotational speed of the second rotor.

[0057] In any of the above embodiments, optionally, the motor further includes a first injection molded part, the first iron core and the second iron core are connected through the first injection molded part, and the first iron core, the second iron core and the first injection molded part are an integral structure.

[0058] In this embodiment, to enable the first and second iron cores to be connected as a whole, the first and second iron cores can be injection molded as inserts to form a first injection molded part. This allows the first and second iron cores to be connected together through the first injection molded part. At this time, the stator iron core is a single injection molded body, thus ensuring the connection strength between the first and second iron cores.

[0059] In any of the above embodiments, optionally, a gap is provided between at least a portion of the outer sidewall of the second stator yoke and the inner sidewall of the first stator yoke, and the first injection molded part includes a filling portion that fills the gap.

[0060] In this embodiment, the first injection molded part is filled into the gap, which can further prevent magnetic leakage between the first iron core and the second iron core, and avoid magnetic field interference between the inner stator and the outer stator during operation.

[0061] In any of the above embodiments, optionally, the first injection molded part includes: an injection base plate, a first iron core and a second iron core mounted on one side of the injection base plate; a first covering layer covering the outer wall surface of the first stator yoke and a plurality of first stator teeth; and a second covering layer covering the inner wall surface of the second stator yoke and a plurality of second stator teeth.

[0062] In this embodiment, the first injection molded part includes an injection base plate, a first covering layer, and a second covering layer. The injection base plate is used to support the first iron core and the second iron core. The first covering layer covers the outer wall surface of the first stator yoke and a plurality of first stator teeth, and the second covering layer covers the inner wall surface of the second stator yoke and a plurality of second stator teeth. By surrounding the two stators in all directions, magnetic field interference between the inner stator and the outer stator can be avoided during operation.

[0063] In any of the above embodiments, optionally, the motor further includes a motor end cover; the first injection molded part further includes: a positioning post, disposed on the injection molding base plate, located between the first iron core and the second iron core, the positioning post being used to limit the motor end cover.

[0064] In this embodiment, the motor also includes a motor end cover. During installation, the first stator and the second stator can be mounted on the first injection molded part. Simultaneously, to facilitate the positioning of the entire stator core assembly (composed of the first and second cores), a positioning post can be injection molded onto the first injection molded part. Specifically, the positioning post can be located between the first and second cores, for example, between the first and second stator yokes. During motor installation, the positioning post and the motor end cover can be fixed together with screws. Alternatively, they can be fixed together using snap-fit ​​mechanisms. The positioning post ensures a more stable installation of the stator core assembly (composed of the first and second cores) within the motor housing, preventing relative movement between the motor end cover and the stator core assembly.

[0065] The fourth aspect of this application provides a household appliance that includes a motor provided by any of the technical solutions in the third aspect.

[0066] The household appliance proposed according to the technical solution of this application, since it includes the motor provided by any of the technical solutions of the third aspect, therefore, has all the beneficial effects of the motor provided by any of the technical solutions of the third aspect. Further details will not be elaborated here.

[0067] Specifically, home appliances can refer to products that require fan blades, such as fans, humidifiers, or air purifiers. Of course, home appliances can also refer to other products that require dual-axis motors.

[0068] The appliance includes a first fan blade and a second fan blade; a first stator including a first iron core; a second stator including a second iron core, disposed radially on the inner side of the first stator; a first rotor, at least a portion of which is disposed radially on the outer side of the first stator and is rotatable under the action of the first stator; a second rotor, at least a portion of which is disposed radially on the inner side of the second stator and is rotatable under the action of the second stator; a first fan blade mounted on the first rotor, and a second fan blade mounted on the second rotor. Optionally, the first fan blade and the second fan blade can rotate independently.

[0069] In this design, the household appliance includes a motor, a first fan blade, and a second fan blade. The motor includes a first stator, a second stator, a first rotor, and a second rotor. The first stator is the outer stator, and the second stator is the inner stator, thus forming a double-stator structure. Simultaneously, a second rotor is located inside the second stator (inner stator), forming an inner motor. The inner stator and inner rotor together form an inner motor. Conversely, a first rotor is located outside the first stator (outer stator), forming an outer motor. This structure, through the inner and outer stators and rotors, constitutes a dual-axis motor. This dual-axis motor can specifically drive the rotation of the first and second fan blades. Specifically, the first fan blade is mounted on the first rotor, and the first rotor, in conjunction with the first stator, enables the first rotor to rotate, thereby driving the first fan blade to rotate. The second fan blade is mounted on the second rotor, and the second rotor, in conjunction with the second stator, enables the second rotor to rotate, thereby driving the second fan blade to rotate. Compared to other dual-leaf home appliances, this structure does not use two motors, thus reducing the cost of the appliance. In addition, since the inner and outer stators and the inner and outer rotors are radially stacked in this application, the thickness of the product can be significantly reduced, improving the product's aesthetics and reducing the product's production cost.

[0070] In this type of home appliance, because the first and second rotors are independent of each other, the first and second fan blades operate independently during operation. This means that the speed and direction of rotation of both fan blades can be controlled separately. The rotation direction of the first and second fan blades can be the same or opposite, and their rotation speeds can be adjusted according to actual needs. This achieves separate control of the speed and direction of the dual fan blades without increasing the axial volume of the motor and the appliance, making the appliance's operating mode more flexible, diversifying its functions, and reducing its cost.

[0071] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0072] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0073] Figure 1 A schematic diagram of the stator core according to an embodiment of the present invention is shown;

[0074] Figure 2 This diagram shows a structural schematic of the first segmented core of the stator core according to an embodiment of the present invention.

[0075] Figure 3 This invention provides a schematic diagram of the structure of the second segmented core of the stator core according to an embodiment of the present invention.

[0076] Figure 4 One of the structural schematic diagrams of a motor according to an embodiment of the present invention is shown;

[0077] Figure 5 The second schematic diagram of the structure of the motor according to an embodiment of the present invention is shown;

[0078] Figure 6 A partial structural schematic diagram of a fan according to an embodiment of the present invention is shown;

[0079] Figure 7 This invention illustrates a combination arrangement of multiple first segmented iron cores and multiple second segmented iron cores during die-stamping according to an embodiment of the present invention;

[0080] Figure 8 The diagram shows a schematic of the structure of the first and second iron cores after plastic coating according to an embodiment of the present invention.

[0081] Figure label:

[0082] 100 Stator core, 1 First core, 10 First receiving cavity, 12 First stator yoke, 14 First stator tooth, 16 First segmented core, 162 First protrusion, 164 First groove, 2 Second core, 22 Second stator yoke, 24 Second stator tooth, 26 Second segmented core, 262 Second protrusion, 264 Second groove, 28 Third groove, 3 Gap, 4 First injection molded part, 42 First covering layer, 44 Second covering layer, 46 Positioning post, 200 Motor, 210 First rotor, 220 Second rotor, 230 Motor end cover, 300 Fan, 310 First fan blade, 320 Second fan blade. Detailed Implementation

[0083] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0084] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0085] The following reference Figures 1 to 8 This application describes stator cores, stator assemblies, motors, and household appliances provided according to some embodiments of the present application.

[0086] like Figures 1 to 3 As shown, the first aspect of this application provides a stator core 100, including a first core 1 and a second core 2. The first core 1 includes a first stator yoke 12 and a plurality of first stator teeth 14, which are spaced apart circumferentially along the first stator yoke 12 and are located on the outer side of the first stator yoke 12, which forms a first receiving cavity 10. The second core 2 is disposed within the first receiving cavity 10 and includes a second stator yoke 22 and a plurality of second stator teeth 24, which are spaced apart circumferentially along the second stator yoke 22 and are located on the inner side of the second stator yoke 22. A gap 3 is provided between at least a portion of the outer sidewall of the second stator yoke 22 and the inner sidewall of the first stator yoke 12.

[0087] The stator core 100 according to the embodiments of this application includes a first core 1 and a second core 2. The first core 1 is the outer core, and the second core 2 is the inner core, thus forming a double-core structure. When the stator core 100 is used in a motor 200, an inner rotor can be provided inside the inner core, so that the inner stator and the inner rotor can form an inner motor. At the same time, an outer rotor can be provided outside the outer core, so that the outer stator and the outer rotor can form an outer motor, thus constituting a dual-shaft motor. Both the inner and outer cores include a yoke and teeth, wherein the teeth of the inner core are located inside its yoke, and the teeth of the outer core are located outside its yoke. In use, upper windings can be wound on the teeth of the outer core and the teeth of the inner core respectively to form a double-stator structure with an inner stator and an outer stator.

[0088] In this design, at least a portion of the outer sidewall of the second stator yoke 22 is provided with a gap 3 between it and the inner sidewall of the first stator yoke 12. That is, the second stator yoke 22 and the first stator yoke 12 are not in complete contact in the radial direction of the stator core 100, and a gap 3 is formed between them. Through this gap 3, mutual magnetic leakage between the first core 1 and the second core 2 can be avoided. This reduces the magnetic field leakage on the first core 1 and the second core 2, and avoids magnetic field interference between the inner stator and the outer stator during operation. This improves the magnetic field utilization rate of the first core 1 and the second core 2, thereby improving the working efficiency of the motor 200.

[0089] In any of the above embodiments, optionally, the outer sidewall of the second stator yoke 22 and the inner sidewall of the first stator yoke 12 are spaced apart.

[0090] In this embodiment, the outer sidewall of the second stator yoke 22 and the inner sidewall of the first stator yoke 12 are spaced apart. This appropriately increases the distance between the second stator yoke 22 and the first stator yoke 12, thereby minimizing magnetic field interference between the inner and outer stators during operation. Optionally, in any of the above embodiments, as shown... Figure 1 As shown, the gap 3 is distributed in a ring shape along the inner sidewall of the first stator yoke 12.

[0091] In this embodiment, a gap 3 is provided around the entire circumference of the first iron core 1 and the second iron core 2, that is, there is no connection between any part of the first iron core 1 and the second iron core 2, so that the first iron core 1 and the second iron core 2 can be completely disconnected, avoiding magnetic field leakage between the first iron core 1 and the second iron core 2. This can minimize magnetic field interference between the inner stator and the outer stator, making the motor 200 more efficient.

[0092] In any of the above embodiments, optionally, as Figure 1As shown, the second stator yoke 22 and the first stator yoke 12 are concentrically arranged. That is, the inner stator and the outer stator are concentrically arranged. Of course, in other designs, the inner and outer stators can also be eccentrically arranged.

[0093] In any of the above embodiments, optionally, the width of the gap 3 along the radial direction of the second stator yoke 22 is greater than 0 mm and less than or equal to 1 mm.

[0094] In this embodiment, the gap 3 between the first stator yoke 12 and the second stator yoke 22 cannot be too large. If it is too large, the overall volume of the stator core 100 will be too large, resulting in low space utilization of the product. Therefore, the width of the gap 3 can be less than or equal to 1 mm.

[0095] In any of the above embodiments, optionally, the width of the gap 3 along the radial direction of the second stator yoke 22 is greater than or equal to 0.3 mm and less than or equal to 0.7 mm.

[0096] In this embodiment, the width of the gap 3 can be set to about 0.3mm-0.7mm. For example, the gap 3 can be 0.5mm.

[0097] In any of the above embodiments, a non-magnetic component may optionally be provided within the gap 3.

[0098] In this embodiment, no material may be placed between the first iron core 1 and the second iron core 2, and the first iron core 1 and the second iron core 2 can be magnetically isolated by the air between them. Of course, in order to connect the first iron core 1 and the second iron core 2 into one unit, a non-magnetic material can also be filled between the first iron core 1 and the second iron core 2 to form a non-magnetic component. In this way, magnetic isolation can be formed between the first iron core 1 and the second iron core 2, while the first iron core 1 and the second iron core 2 can be connected into a whole.

[0099] In any of the above embodiments, optionally, as Figure 1 and Figure 2 As shown, the first iron core 1 includes a plurality of first segmented iron cores 16.

[0100] In this embodiment, the first iron core 1, i.e., the outer iron core, can be configured as a block structure. In this case, the first iron core 1 is formed by splicing together multiple first block iron cores 16. This structure makes it easier to set windings on the first iron core 1. At the same time, setting the first iron core 1 as a block structure can improve the material utilization rate in the preparation of the first iron core 1.

[0101] For example, multiple first lamination blocks can be formed by lamination, and then the multiple first lamination blocks can be formed into a first segmented iron core 16. This method of preparing the first iron core 1 makes the material utilization rate higher, thereby reducing the preparation cost of the stator iron core 100.

[0102] In any of the above embodiments, optionally, as Figure 2 As shown, the first segmented iron core 16 is provided with a first protrusion 162 and a first groove 164 at both ends of the first iron core 1 along the radial direction. Two adjacent first segmented iron cores 16 are positioned and engaged by the first protrusion 162 and the first groove 164.

[0103] In this embodiment, in order to ensure the connection strength and splicing position of the multiple first segment iron cores 16 during splicing, a first protrusion 162 and a first groove 164 can be respectively provided at both ends of the first segment iron core 16. When splicing the first segment iron core 16, two adjacent first segment iron cores 16 can be aligned and cooperated through the first protrusion 162 and the first groove 164 to ensure that the multiple first segment iron cores 16 can be spliced ​​to form the first iron core 1 more quickly.

[0104] In any of the above embodiments, the first iron core 1 may optionally include a third injection molded part, and a plurality of first segmented iron cores 16 are connected to form an integral unit through the third injection molded part.

[0105] In this embodiment, multiple first segmented iron cores 16 can be connected together by injection molding. For example, multiple first segmented iron cores 16 can be placed in a mold as inserts, and then a third injection molded part can be formed in the mold. In this way, multiple first segmented iron cores 16 can be integrally injection molded with the third injection molded part, thereby realizing the splicing between multiple first segmented iron cores 16.

[0106] In any of the above embodiments, optionally, as Figure 1 and Figure 3 As shown, the second iron core 2 includes multiple second segmented iron cores 26.

[0107] In this embodiment, the second iron core 2, i.e., the inner iron core, can be configured as a block structure. In this case, the second iron core 2 is formed by splicing together multiple second block iron cores 26. This structure makes it easier to set windings on the second iron core 2. At the same time, setting the second iron core 2 as a block structure can improve the material utilization rate in the preparation of the second iron core 2.

[0108] For example, multiple second lamination blocks can be formed by lamination, and then the multiple second lamination blocks can be formed into a second segmented core 26. This method of preparing the second core 2 makes the material utilization rate higher, thereby reducing the preparation cost of the stator core 100.

[0109] In any of the above embodiments, optionally, as Figure 3 As shown, the second segmented iron core 26 is provided with a second protrusion 262 and a second groove 264 at both ends of the second iron core 2 along the radial direction. Two adjacent second segmented iron cores 26 are positioned and engaged by the second protrusion 262 and the second groove 264.

[0110] In this embodiment, in order to ensure the connection strength and splicing position of the multiple second segment iron cores 26 during splicing, a second protrusion 262 and a second groove 264 can be respectively provided at both ends of the second segment iron core 26. When splicing the second segment iron core 26, two adjacent second segment iron cores 26 can be aligned and cooperated through the second protrusion 262 and the second groove 264 to ensure that the multiple second segment iron cores 26 can be spliced ​​to form the second iron core 2 more quickly.

[0111] In any of the above embodiments, the second iron core 2 may optionally include a second injection molded part, and a plurality of first segmented iron cores 16 are connected to form an integral unit through the second injection molded part.

[0112] In this embodiment, multiple second segmented iron cores 26 can be connected together by injection molding. For example, multiple second segmented iron cores 26 can be placed in a mold as inserts, and then injection molded in the mold to form a second injection molded part. In this way, multiple second segmented iron cores 26 can be integrally injection molded with the second injection molded part, thereby realizing the splicing between multiple second segmented iron cores 26.

[0113] In any of the above embodiments, the stator core 100 may optionally include a first injection molded part, the first core 1 and the second core 2 are connected through the first injection molded part, and the first core 1, the second core 2 and the first injection molded part are an integral structure.

[0114] In this embodiment, to enable the first core 1 and the second core 2 to be connected as a whole, the first core 1 and the second core 2 can be injection molded into a first injection molded part as inserts. This allows the first core 1 and the second core 2 to be connected together through the first injection molded part. At this time, the stator core 100 is a single injection molded body, which ensures the connection strength between the first core 1 and the second core 2.

[0115] The inner side of the first stator yoke 12 and / or the outer side of the second stator yoke 22 are provided with a third protrusion and / or a third groove 28 (e.g., Figure 3 (As shown). When the stator core 100 is connected via the first injection molded part, the injection molding material can fill the third groove 28, or the third protrusion can form an embedding groove on the first injection molded part, thereby increasing the contact area between the first injection molded part and the first core 1 and the second core 2. Thus, the third protrusion and / or the third groove 28 can improve the connection strength between the first injection molded part and the first core 1 and the second core 2 when the stator core 100 is connected via the injection molded part.

[0116] In any of the above embodiments, optionally, as Figure 1As shown, the number of first stator teeth 14 is greater than the number of second stator teeth 24; and / or any two adjacent first stator teeth 14 and first stator yoke 12 form a stator outer groove, and any two adjacent second stator teeth 24 and second stator yoke 22 form a stator inner groove, and the number of stator outer grooves is greater than the number of stator inner grooves.

[0117] In this embodiment, the inner and outer stators have different numbers of teeth and slots, resulting in different pole numbers. This allows for different rotational speeds between the inner and outer rotors, thus meeting the needs of different loads. For example, the outer stator has more slots than the inner stator, enabling the outer stator to achieve low-speed, high-torque operation through more slots, while the inner stator can achieve high-speed, low-torque operation through fewer slots. This allows the dual-shaft motor to output different speeds, thereby expanding the application scenarios of the motor 200.

[0118] The first iron core 1 and the second iron core 2 are formed by stamping.

[0119] For example, both the first iron core 1 and the second iron core 2 are segmented iron cores. The first iron core 1 is formed by splicing together multiple first segmented iron cores 16, and the second iron core 2 is formed by splicing together multiple second segmented iron cores 26. The multiple first segmented iron cores 16 and the multiple second segmented iron cores 26 are formed by stamping using a die combination. The inner and outer stators are formed by stamping using a die combination, which can reduce the die volume, improve material utilization, and reduce costs.

[0120] In combined stamping, it is possible to first... Figure 7 As shown, multiple first segmented iron cores 16 and multiple second segmented iron cores 26 are arranged in combination, and then a stamping mold is prepared based on the structure after the combination arrangement. Then, multiple first segmented iron cores 16 and multiple second segmented iron cores 26 can be stamped and processed in one go based on the prepared stamping mold.

[0121] like Figure 1 As shown, an embodiment of the second aspect of this application provides a stator assembly including the stator core 100 provided in any embodiment of the first aspect.

[0122] The stator assembly proposed according to the embodiments of this application, since it includes the stator core 100 provided in any embodiment of the first aspect, therefore, has all the beneficial effects of the stator core 100 provided in any embodiment of the first aspect. Further details will not be elaborated here.

[0123] Furthermore, the stator assembly also includes a first winding wound on a first iron core 1 and a second winding wound on a second iron core 2. The first winding and the first iron core 1 together form the first stator, and the second winding and the second iron core 2 together form the second stator.

[0124] Furthermore, the number of poles of the first stator is greater than the number of poles of the second stator.

[0125] like Figure 4 , Figure 5 and Figure 8 As shown, an embodiment of the third aspect of this application provides an electric motor 200, including a stator core 100 provided in any embodiment of the first aspect; and / or a stator assembly provided in any embodiment of the second aspect.

[0126] The motor 200 proposed according to the embodiments of this application, since it includes the stator core 100 provided in any embodiment of the first aspect and / or the stator assembly provided in any embodiment of the second aspect, therefore, it has all the beneficial effects of the stator core 100 provided in any embodiment of the first aspect and / or the stator assembly provided in any embodiment of the second aspect. Further details will not be elaborated here.

[0127] Optionally, such as Figure 4 , Figure 5 and Figure 8 As shown, the motor 200 further includes: a first stator, including a first iron core 1; a second stator, including a second iron core 2, disposed on the inner side of the first stator along the radial direction of the first stator; a first rotor 210, at least a portion of which is disposed on the outer side of the first stator along the radial direction of the first stator and is rotatable under the action of the first stator; and a second rotor 220, at least a portion of which is disposed on the inner side of the second stator along the radial direction of the second stator and is rotatable under the action of the second stator.

[0128] In this embodiment, the motor 200 includes a first stator and a second stator, as well as a first rotor 210 and a second rotor 220. The first stator is the outer stator, and the second stator is the inner stator, thus forming a double-stator structure. Simultaneously, a second rotor 220 is disposed inside the second stator (inner stator), forming an inner motor 200. Conversely, a first rotor 210 is disposed outside the first stator (outer stator), forming an outer motor 200. This structure, with its inner and outer stators and rotors, constitutes a dual-axis motor 200. Because the inner and outer stators and rotors are radially stacked, this structure significantly reduces the product's thickness, improves its aesthetics, and lowers production costs.

[0129] In this type of motor 200, since the first rotor 210 and the second rotor 220 are independent of each other, dual-speed control of a single motor 200 can be achieved.

[0130] Optionally, the first rotor 210 and the second rotor 220 may rotate in the same direction or in opposite directions, so that the rotation direction of the first rotor 210 and the second rotor 220 can be controlled according to different usage requirements.

[0131] In any of the above embodiments, optionally, the rotational speed of the first rotor 210 is less than the rotational speed of the second rotor 220.

[0132] In this embodiment, the diameter of the first blade 310 is significantly larger than that of the second blade 320. At the same rotational speed, the air delivery capacity of the first blade 310 is much greater than that of the second blade 320. This causes the strong winds from both sides to diffuse towards the center, increasing wind resistance and reducing air delivery efficiency. This application sets the rotational speed of the first rotor 210 to be less than that of the second rotor 220, which effectively increases the air delivery capacity of the second blade 320, ensuring that the air delivery intensity is the same in the middle and on the outer sides, thereby reducing wind resistance and improving air delivery efficiency. Of course, depending on different needs, the rotational speed of the first rotor 210 can also be greater than or equal to the rotational speed of the second rotor 220.

[0133] In any of the above embodiments, optionally, as Figure 8 As shown, the motor 200 also includes a first injection molded part 4. The first iron core 1 and the second iron core 2 are connected through the first injection molded part 4. The first iron core 1, the second iron core 2 and the first injection molded part 4 are an integral structure.

[0134] In this embodiment, to enable the first core 1 and the second core 2 to be connected as a whole, the first core 1 and the second core 2 can be injection molded into a first injection molded part 4 as inserts. This allows the first core 1 and the second core 2 to be connected together through the first injection molded part 4. At this time, the stator core 100 is a single injection molded body, which ensures the connection strength between the first core 1 and the second core 2.

[0135] In any of the above embodiments, optionally, as Figure 8 As shown, a gap 3 is provided between at least a portion of the outer sidewall of the second stator yoke 22 and the inner sidewall of the first stator yoke 12, and the first injection molded part 4 includes a filling part that fills the gap 3.

[0136] In this embodiment, the first injection molded part 4 is filled into the gap 3. This can further prevent magnetic leakage between the first iron core 1 and the second iron core 2, and prevent magnetic field interference between the inner stator and the outer stator during operation.

[0137] In any of the above embodiments, optionally, as Figure 8As shown, the first injection molded part 4 includes: an injection base plate, a first iron core 1 and a second iron core 2 mounted on one side of the injection base plate; a first covering layer 42 covering the outer wall surface of the first stator yoke 12 and a plurality of first stator teeth 14; and a second covering layer 44 covering the inner wall surface of the second stator yoke 22 and a plurality of second stator teeth 24.

[0138] In this embodiment, the first injection molded part 4 includes an injection base plate, a first covering layer 42, and a second covering layer 44. The injection base plate is used to support the first iron core 1 and the second iron core 2. The first covering layer 42 covers the outer wall surface of the first stator yoke 12 and the plurality of first stator teeth 14, and the second covering layer 44 covers the inner wall surface of the second stator yoke 22 and the plurality of second stator teeth 24. By surrounding the two stators in all directions, magnetic field interference between the inner stator and the outer stator can be avoided during operation.

[0139] In any of the above embodiments, optionally, as Figure 8 As shown, the motor 200 also includes a motor end cover 230; the first injection molded part 4 also includes a positioning post 46, which is disposed on the injection molding base plate and located between the first iron core 1 and the second iron core 2. The positioning post 46 is used to limit the motor end cover 230.

[0140] In this embodiment, the motor 200 also includes a motor end cover 230. During installation, the first stator and the second stator can be mounted on the first injection molded part 4. Simultaneously, to facilitate the positioning of the entire stator core 100 assembly (composed of the first core 1 and the second core 2), a positioning post 46 can be injection molded onto the first injection molded part 4. Specifically, the positioning post 46 can be located between the first core 1 and the second core 2, for example, between the first stator yoke 12 and the second stator yoke 22. When installing the motor 200, the positioning post 46 and the motor end cover 230 can be fixed together with screws. Alternatively, the positioning post 46 and the motor end cover 230 can be fixed together with snap-fit ​​fasteners. By fixing the positioning post 46, the stator core 100 assembly, composed of the first core 1 and the second core 2, can be installed more stably within the motor 200 housing, preventing relative movement between the motor end cover 230 and the stator core 100 assembly.

[0141] An embodiment of the fourth aspect of this application provides a household appliance including a motor 200 provided in any embodiment of the third aspect.

[0142] The household appliance proposed according to the embodiments of this application, since it includes the motor 200 provided in any embodiment of the third aspect, therefore has all the beneficial effects of the motor 200 provided in any embodiment of the third aspect. Further details will not be elaborated here.

[0143] Specifically, home appliances can refer to products that require fan blades, such as fans 300, humidifiers, or air purifiers. Of course, home appliances can also refer to other products that require dual-axis motors 200.

[0144] Among them, such as Figure 6 As shown, the household appliance includes a first fan blade 310 and a second fan blade 320; a first stator including a first iron core 1; a second stator including a second iron core 2, disposed on the inner side of the first stator along the radial direction; a first rotor 210, at least a portion of which is disposed on the outer side of the first stator along the radial direction and is rotatable under the action of the first stator; a second rotor 220, at least a portion of which is disposed on the inner side of the second stator along the radial direction and is rotatable under the action of the second stator; the first fan blade 310 is mounted on the first rotor 210, and the second fan blade 320 is mounted on the second rotor 220. Optionally, the first fan blade 310 and the second fan blade 320 can rotate independently.

[0145] In this design, the household appliance includes a motor 200, a first fan blade 310, and a second fan blade 320. The motor 200 includes a first stator and a second stator, as well as a first rotor 210 and a second rotor 220. The first stator is the outer stator, and the second stator is the inner stator, thus forming a double-stator structure. Simultaneously, a second rotor 220 is disposed inside the second stator (inner stator), forming an inner motor 200. Conversely, a first rotor 210 is disposed outside the first stator (outer stator), forming an outer motor 200. This structure, through the inner and outer stators and rotors, constitutes a dual-axis motor 200. This dual-axis motor 200 can specifically drive the rotation of the first fan blade 310 and the second fan blade 320. Specifically, the first fan blade 310 is mounted on the first rotor 210. The first rotor 210 cooperates with the first stator to rotate, thereby driving the first fan blade 310 to rotate. The second fan blade 320 is mounted on the second rotor 220. The second rotor 220 cooperates with the second stator to rotate, thereby driving the second fan blade 320 to rotate. Compared with other double-blade household appliances, this structure does not use two motors 200, thus reducing the cost of the appliance. Furthermore, in this application, since the inner and outer stators and rotors are radially stacked, the product thickness can be significantly reduced, improving the product's aesthetics and lowering production costs.

[0146] In this type of home appliance, since the first rotor 210 and the second rotor 220 are independent of each other, the first fan blade 310 and the second fan blade 320 are also independent during operation. That is, the rotational speed and direction of the first fan blade 310 and the second fan blade 320 can be controlled separately. The rotational direction of the first fan blade 310 and the second fan blade 320 can be in the same direction or opposite directions, and their rotational speeds can also be adjusted according to actual needs. This achieves separate control of the rotational speed and direction of the two fan blades without increasing the axial volume of the motor 200 and the home appliance, making the operating mode of the home appliance more flexible, diversifying its functions, and reducing its cost.

[0147] The following describes a core structure with inner and outer double stators.

[0148] Traditional dual-rotor motors, as shown above, have an inner stator and an outer stator that are either integrally formed or directly connected. They are stamped together, resulting in low material utilization. Since the inner and outer stators are directly connected, there is a magnetic circuit connection. During operation, the inner and outer rotor motors will generate magnetic field interference, affecting operation.

[0149] To address the aforementioned problems, this application proposes a double-stator core with an inner and outer shaft, wherein a gap is provided between the inner and outer double-axis stator cores. Its specific structure is as follows: Figure 1 As shown.

[0150] Furthermore, the inner stator consists of multiple segmented iron cores (the structure of which is as follows) Figure 3 The outer stator is formed by splicing together multiple segmented iron cores (as shown). Figure 2 (As shown) are formed by splicing together.

[0151] The beneficial effects of the motor provided in this embodiment are as follows:

[0152] 1. The inner and outer stators are not directly connected, which can reduce leakage flux, improve motor operating efficiency, and reduce interference between the two motors.

[0153] 2. The motor adopts a segmented structure, which allows the motor to use a segmented external winding process, increasing the winding speed from a maximum of 1400rpm to a maximum of 7000rpm, and significantly improving winding efficiency.

[0154] 3. The inner and outer stators are matched with different numbers of slots, which can realize a low-speed, high-torque motor solution with a multi-slot outer stator and a high-speed, low-torque motor solution with a fewer slots in the inner stator.

[0155] 4. The inner and outer stators can be divided into sections and then injection molded into a whole through the plastic coating process, which makes the sectioned stator more convenient.

[0156] The motor can be an internal synchronous motor, an external asynchronous motor, or an internal asynchronous motor and an external synchronous motor.

[0157] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0158] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator core characterized by, include: The first iron core includes a first stator yoke and a plurality of first stator teeth. The plurality of first stator teeth are arranged circumferentially spaced along the first stator yoke. The first stator teeth are located on the outer side of the first stator yoke, and the first stator yoke forms a first receiving cavity. The second iron core is disposed in the first receiving cavity. The second iron core includes a second stator yoke and a plurality of second stator teeth. The plurality of second stator teeth are arranged circumferentially spaced along the second stator yoke, and the second stator teeth are disposed on the inner side of the second stator yoke. Wherein, at least a portion of the outer sidewall of the second stator yoke is provided with a gap between the inner sidewall of the first stator yoke.

2. The stator core according to claim 1, characterized by The outer sidewall of the second stator yoke is spaced apart from the inner sidewall of the first stator yoke.

3. The stator core of claim 1, characterized by The second stator yoke and the first stator yoke are arranged concentrically.

4. The stator core according to claim 1, characterized in that, Along the radial direction of the second stator yoke, the width of the gap is greater than or equal to 0.3 mm and less than or equal to 0.7 mm.

5. The stator core according to claim 1, characterized in that, The first iron core includes a plurality of first segmented iron cores. Each of the first segmented iron cores has a first protrusion and a first groove at both ends radially disposed on the first iron core. Adjacent first segmented iron cores are positioned and engaged by the first protrusion and the first groove; and / or The second iron core includes a plurality of second segmented iron cores. The two ends of the second segmented iron cores arranged radially along the second iron core are respectively provided with a second protrusion and a second groove. Two adjacent second segmented iron cores are positioned and engaged by the second protrusion and the second groove.

6. The stator core according to any one of claims 1 to 5, characterized in that, The stator core also includes a first injection molded part, and the first core and the second core are connected through the first injection molded part. The first core, the second core and the first injection molded part are an integral structure.

7. The stator core according to any one of claims 1 to 5, characterized in that, The number of first stator teeth is greater than the number of second stator teeth; and / or Any two adjacent first stator teeth and the first stator yoke form a stator outer slot, and any two adjacent second stator teeth and the second stator yoke form a stator inner slot. The number of stator outer slots is greater than the number of stator inner slots.

8. A stator assembly, characterized in that, Includes the stator core as described in any one of claims 1 to 7.

9. An electric motor, characterized in that, include: Stator core as described in any one of claims 1 to 7; and / or The stator assembly as described in claim 8.

10. The motor according to claim 9, characterized in that, Also includes: The first stator includes the first iron core; The second stator, including the second iron core, is disposed on the inner side of the first stator along the radial direction of the first stator; A first rotor, at least a portion of which is disposed on the outside of the first stator along the radial direction of the first stator, is capable of rotating under the action of the first stator; The second rotor, at least a portion of which is disposed inside the second stator along the radial direction of the second stator, is capable of rotating under the action of the second stator; The first rotor and the second rotor rotate in the same direction or in opposite directions.

11. The motor according to claim 10, characterized in that, The rotational speed of the first rotor is less than that of the second rotor.

12. The motor according to claim 10, characterized in that, The motor also includes a first injection molded part, and the first iron core and the second iron core are connected through the first injection molded part. The first iron core, the second iron core and the first injection molded part are an integral structure.

13. The motor according to claim 12, characterized in that, A gap is provided between at least a portion of the outer sidewall of the second stator yoke and the inner sidewall of the first stator yoke, and the first injection molded part includes a filling portion that fills the gap.

14. The motor according to claim 12, characterized in that, The first injection molded part includes: Injection molding base plate, the first iron core and the second iron core are installed on one side of the injection molding base plate; The first covering layer covers the outer wall surface of the first stator yoke and the plurality of first stator teeth; The second covering layer covers the inner wall surface of the second stator yoke and the plurality of second stator teeth.

15. The motor according to claim 12, characterized in that, The motor also includes a motor end cover; The first injection molded part also includes a positioning post, which is located between the first iron core and the second iron core, and is used to limit the position of the motor end cover.

16. A household appliance, characterized in that, include: The motor as described in any one of claims 9 to 15.

17. The household appliance according to claim 16, characterized in that, Also includes: First blade and second blade; The first stator includes the first iron core; The second stator, including the second iron core, is disposed on the inner side of the first stator along the radial direction of the first stator; A first rotor, at least a portion of which is disposed on the outside of the first stator along the radial direction of the first stator, is capable of rotating under the action of the first stator; The second rotor, at least a portion of which is disposed inside the second stator along the radial direction of the second stator, is capable of rotating under the action of the second stator; The first fan blade is mounted on the first rotor, and the second fan blade is mounted on the second rotor.

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