Refrigerator motor stator and motor

Abstract

The application relates to the field of refrigerator refrigeration compressor motors, and is a refrigerator motor stator and a motor manufacturing process method, which comprises a stator core and a coil, the stator core is formed with a core slot, the coil is arranged in the core slot and covers the upper and lower two end faces of the stator core, the upper and lower two end faces of the stator core and the inner surface of the core slot are uniformly sprayed with an insulating material film, the film thickness is between 0.15-0.25 mm, and the part of the coil extending to the outside of the core slot is attached to the upper and lower end faces of the core. According to the application, the insulating paper in the wire slot is replaced by the sprayed insulating film, meanwhile, the upper and lower end faces of the stator core are also sprayed with the insulating film, the part of the coil extending to the outside of the wire slot can be closer to the upper and lower end faces of the stator core or attached to the end faces of the core, and therefore the length of the coil in the core is shortened.

Description

Technical Field

[0001] This application relates to the technical field of refrigerator motors, and in particular to a motor stator and a motor. Background Technology

[0002] In an electric motor, the main function of the stator is to generate a rotating magnetic field. The stator has a central hole to accommodate the rotor, and slots are formed on the stator. The coils are wound within these slots, and when energized, they act as the rotating magnetic field. Electrical isolation must be maintained between the stator core and the coils to prevent winding current from directly passing through the core and causing a short circuit, which could damage the equipment or lead to a safety accident.

[0003] In related technologies, insulating paper is typically placed inside the wire groove to separate the coil from the iron core, such as... Figure 1 As shown, to ensure insulation, the insulating paper typically extends 6-10mm beyond the wire slot, maintaining a certain distance between the portion of the coil outside the slot and the upper and lower ends of the iron core. From a motor design perspective, the extended portion of the insulating paper results in more coil being wound around the iron core, increasing production costs and reducing motor efficiency. Summary of the Invention

[0004] In order to improve motor efficiency and reduce production costs, this application provides a refrigerator motor stator and motor.

[0005] The refrigerator motor stator provided in this application adopts the following technical solution: A refrigerator motor stator includes an iron core and a coil. The iron core has a core groove, the coil is wound in the core groove and covers the upper and lower end faces of the iron core, and the upper and lower end faces of the iron core are covered with an insulating film. The portion of the coil extending outside the core groove is attached to the upper and lower end faces of the iron core.

[0006] Optionally, the inner wall of the core slot of the iron core is covered with an insulating film, and the insulating film is connected to the insulating film covering the upper and lower end faces of the iron core to separate the coil from the iron core.

[0007] Optionally, the insulating film on the upper and lower end faces of the iron core and inside the core groove is made of polybutylene terephthalate.

[0008] Optionally, the core is formed by stacking several silicon steel sheets arranged sequentially along its axial direction.

[0009] Optionally, a heat dissipation groove is formed on the outer peripheral surface of the iron core, the heat dissipation groove extends along the axial direction of the iron core and has a circular arc cross-section.

[0010] This application also provides an electric motor comprising a refrigerator motor stator as described above.

[0011] In summary, this application includes at least one of the following beneficial technical effects: 1. By replacing the insulating paper in the slot with a film, and simultaneously covering the upper and lower end faces of the stator core with a film, the portion of the coil extending outside the slot can be closer to the upper and lower end faces of the stator core, thereby shortening the coil length, thus reducing design costs and improving motor efficiency. 2. Reducing the height of the motor also reduces the height of the compressor, thus lowering structural design costs; 3. Laminating the inside of the cable tray can increase the effective usable area inside the tray by approximately 7%; 4. The reduced height of the motor leads to a reduced height of the compressor, which increases the effective volume of the refrigeration appliance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a motor stator in the existing technology.

[0013] Figure 2 This is a schematic diagram of the structure of the motor stator in Embodiment 1 of this application.

[0014] Figure 3 This is a schematic diagram of the motor stator in Embodiment 2 of this application.

[0015] Reference numerals in the attached diagram: 1. Iron core; 2. Core groove; 3. Insulating film; 4. Insulating paper; 5. Heat dissipation groove. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 2-3 This application will be described in further detail. Example 1

[0017] This application discloses a refrigerator motor stator. (Refer to...) Figure 2 The motor stator includes an iron core 1 and coils (not shown in the attached diagram). The iron core 1 is generally cylindrical, with a central hole for accommodating the rotor. Several core slots 2 are formed on the inner side of the iron core 1. Each core slot 2 extends along the axial direction of the iron core 1 and passes through the upper and lower end faces of the iron core 1. The core slots 2 are evenly distributed around the central axis of the iron core 1. The coils are wound in the core slots 2 in a specific manner. The part of the coils extending outside the core slots 2 passes through the upper and lower end faces of the iron core 1, thus forming the motor stator. The iron core 1 is made of several silicon steel sheets stacked sequentially along its axial direction. Heat dissipation grooves 5 are formed on the outer circumferential surface of the iron core 1. The heat dissipation grooves 5 extend along the axial direction of the iron core 1 and have an arc-shaped cross-section. By forming heat dissipation grooves 5, the heat dissipation area of ​​the motor stator can be increased, thereby improving its heat dissipation effect.

[0018] Reference Figure 2An insulating film 4 is sprayed inside the core slot 2, adhering tightly to the inner wall of the core slot 2 and extending to both ends flush with the upper and lower end faces of the iron core 1. An insulating film 3 covers the upper and lower end faces of the iron core 1. When the coil is wound, the portion of the coil located inside the core slot 2 is surrounded by the insulating film 3, separating the coil from the inner wall of the core slot 2; the portion of the coil located outside the core slot 2 is close to the insulating film 3 covering the upper and lower end faces of the iron core 1. Ultimately, this completely isolates the coil from the iron core 1, maintaining electrical isolation and preventing winding current from flowing through the iron core 1 and causing a short circuit.

[0019] When the above structure is adopted, since the upper and lower end faces of the iron core 1 are covered with insulating film 3, the insulating film in the core groove 2 can be shortened to be flush with the upper and lower end faces of the iron core 1. When the coil is wound, the coil can be attached to the surface of the iron core 1, thereby shortening the coil length, which can improve the motor efficiency by 2%-3% and reduce the weight of the enameled wire by 3%.

[0020] Preferably, the insulating film 3 covering the upper and lower end faces of the iron core 1 is made of polybutylene terephthalate. The refrigerator motor stator of this embodiment has at least the following advantages.

[0021] After the upper and lower end faces of the iron core 1 are covered with film, the height of the coil wound on the iron core 1 is shortened, which can reduce the weight of the coil, reduce the design cost, reduce the design height of the iron core, and improve the efficiency of the motor.

[0022] This application also provides a motor including the above-mentioned refrigerator motor stator, which may further include structures or components such as a rotor, rotor shaft and housing.

[0023] Similarly, the components included in the "components," "mechanisms," and "devices" of this disclosure can also be flexibly combined. They can be modularly produced according to actual needs and assembled as an independent module; or they can be assembled separately to form a module in this device. The division of the above-mentioned components in this disclosure is only one embodiment for ease of reading and is not intended to limit the scope of protection of this disclosure. Any technical solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this disclosure.

[0024] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0025] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0027] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0029] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A refrigerator motor stator, comprising an iron core (1) and a coil, wherein a core groove (2) is formed on the iron core (1), and the coil is wound in the core groove (2) and covers the upper and lower end faces of the iron core (1), characterized in that: The upper and lower end faces of the iron core (1) are covered with insulating film (3), and the part of the coil extending outside the core groove (2) is attached to the upper and lower end faces of the iron core (1); the iron core (1) is made of several silicon steel sheets stacked in sequence along its axial direction; a heat dissipation groove (5) is provided on the outer circumferential surface of the iron core (1), and the heat dissipation groove (5) extends along the axial direction of the iron core (1) and has a circular arc cross-section.

2. The refrigerator motor stator of claim 1, wherein: The inner wall of the core groove (2) formed by the iron core (1) is covered with an insulating film (3). The insulating film (3) is connected to the insulating film (3) on the upper and lower end faces of the iron core (1) to separate the coil from the iron core (1).

3. The refrigerator motor stator of claim 2, wherein: The insulating film (3) on the upper and lower end faces of the iron core (1) and in the core groove (2) is made of polybutylene terephthalate.

4. An electric machine characterized by: It includes a refrigerator motor stator as described in any one of claims 1-3.

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