A motor for a refrigerator compressor

Abstract

The application relates to a motor for a refrigerator compressor and belongs to the technical field of compressor motors. The motor comprises a stator and a rotor used in cooperation with the stator, the stator comprises a plurality of iron core punching sheets stacked up and down, the iron core punching sheets comprise first silicon steel sheets with corners and second silicon steel sheets with notched corners, a plurality of the second silicon steel sheets are stacked above a plurality of the first silicon steel sheets, and the corners of the stator have sunken mounting notches. The crankcase of a fixed-frequency compressor and the crankcase of a variable-frequency compressor are two kinds of materials, and the main difference lies in the connecting column of the crankcase. The connecting column of the crankcase of the application is inserted into the sunken mounting notches of the stator, the conventional idea is broken, the crankcase of the fixed-frequency compressor can also be applied to the technical scheme of the application, and the management of the materials is reduced.

Description

Technical Field

[0001] This application relates to the technical field of compressor motors, and more particularly to a motor for a refrigerator compressor. Background Technology

[0002] The refrigerator compressor is the core component of the refrigeration system. Its main function is to draw in low-temperature, low-pressure refrigerant gas, compress it into low-temperature, high-pressure gas, and then send it to the condenser, thereby driving the entire refrigeration cycle.

[0003] The motor is a key component inside the compressor. The motor mainly consists of a stator, a rotor, and terminals. The stator is made of laminated silicon steel sheets with coils wound with copper or aluminum enameled wire embedded on it. The stator is connected to the crankcase inside the compressor. The rotor is also made of laminated silicon steel sheets and has copper bars and short-circuit rings cast on it, forming a squirrel-cage structure. The rotating magnetic field of the stator cuts the copper bars on the rotor, generating an induced current, which in turn generates a magnetic field. The terminals connect the internal motor windings to the external circuit.

[0004] In related technologies, refrigerators are divided into inverter and fixed frequency types, and correspondingly, inverter refrigerators and fixed frequency refrigerators use different compressors.

[0005] Regarding the technologies mentioned above, one of the main differences between variable frequency compressors and fixed frequency compressors lies in the crankcase. Different types of compressors use different crankcases, which increases the cost of material management. Summary of the Invention

[0006] In order to reduce the material management cost of crankcase, this application provides a motor for refrigerator compressor.

[0007] This application provides a motor for a refrigerator compressor, which adopts the following technical solution:

[0008] An electric motor for a refrigerator compressor includes a stator and a rotor that cooperates with the stator, the stator including a plurality of stacked iron core laminations;

[0009] The core lamination includes a first silicon steel sheet with corners and a second silicon steel sheet with notches at the corners. A plurality of second silicon steel sheets are stacked on top of a plurality of first silicon steel sheets, so that the corners of the stator have recessed mounting notches.

[0010] By adopting the above technical solution, during use, several second silicon steel sheets are stacked on top of several first silicon steel sheets, so that the corners of the stator have sunken installation notches. The crankcase of the fixed-frequency compressor and the crankcase of the variable-frequency compressor are two different specifications of materials. The main difference lies in the connecting column of the crankcase. The connecting column of the crankcase in this application is inserted into the sunken installation notch of the stator, which breaks away from the conventional thinking and allows the crankcase of the fixed-frequency compressor to be used in the technical solution of this application, reducing material management.

[0011] Optionally, the mounting notch has several abutment surfaces that rely on the crankcase.

[0012] By adopting the above technical solution, when the connecting column of the crankcase is inserted into the installation notch, the connecting column comes into contact with the abutment surface. Through the action of the abutment surface, the crankcase is not easy to rotate.

[0013] Optionally, the first silicon steel sheet has screw holes.

[0014] By adopting the above technical solution, when the stator is connected to the crankcase, the connecting post of the crankcase is inserted into the mounting notch of the stator, and then the screw is inserted into the screw hole and inserted into the connecting post of the crankcase. The stator and the crankcase are then connected by the screw.

[0015] Optionally, the thickness of the second silicon steel sheet is 10-20 mm.

[0016] Optionally, a winding aid is provided on the end face of the stator near the crankcase, and part of the winding aid enters the crankcase.

[0017] By adopting the above technical solution, after the connecting column of the crankcase is connected to the stator, the winding auxiliary component of the stator can enter the crankcase to a certain extent, minimizing the gap between the stator and the crankcase, thereby reducing the overall height of the compressor.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] 1. The crankcases of fixed-frequency compressors and variable-frequency compressors are made of two different specifications of materials. The main difference lies in the connecting column of the crankcase. The connecting column of the crankcase in this application is inserted into the installation notch of the stator, which breaks away from conventional thinking and allows the crankcase of fixed-frequency compressors to be used in the technical solution of this application, reducing material management.

[0020] 2. The recessed mounting notch can shorten the screw length, reduce weight, and lower costs;

[0021] 3. After the crankcase connecting column is connected to the stator, the stator winding auxiliary parts can enter the crankcase to a certain extent, minimizing the gap between the stator and the crankcase, thereby reducing the overall height of the compressor. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the state after the crankcase and motor are connected in an embodiment of this application.

[0023] Figure 2 This is a schematic diagram of the stator structure in an embodiment of this application.

[0024] Explanation of reference numerals in the attached drawings: 1. Crankcase; 11. Connecting column; 2. Stator; 21. Core lamination; 22. First silicon steel sheet; 23. Second silicon steel sheet; 24. Mounting notch; 25. Screw hole; 26. Winding auxiliary component; 27. Abutment surface; 3. Rotor. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] This application discloses a motor for a refrigerator compressor.

[0027] Reference Figure 1 The compressor includes a motor and a crankcase 1. The crankcase 1 has a connecting column 11. The motor is connected to the connecting column 11 of the crankcase 1, and the crankshaft inside the crankcase 1 extends into the rotor of the motor.

[0028] The motor includes a stator 2 and a rotor, with the rotor passing through the stator 2 and working in conjunction with it.

[0029] See Figure 2 The stator 2 includes multiple stacked iron core laminations 21 (not shown in the diagram due to their dense stacking), and the iron core laminations 21 are made of silicon steel sheets.

[0030] The core lamination 21 includes a plurality of first silicon steel sheets 22 and a plurality of second silicon steel sheets 23. The first silicon steel sheets 22 have four corners, and the corners of the second silicon steel sheets 23 have notches. In use, the plurality of second silicon steel sheets 23 are stacked on top of the plurality of first silicon steel sheets 22, so that the corners of the stator 2 have recessed mounting notches 24. Generally, the second silicon steel sheets 23 have four corners, and all four corners have notches. In other embodiments, the number of notches may be two or three to accommodate different styles of crankcases.

[0031] The first silicon steel sheet 22 has screw holes 25, through which screws for connection with the crankcase 1 are inserted.

[0032] When the stator 2 is connected to the crankcase 1, the connecting post 11 of the crankcase 1 is inserted into the mounting notch 24 of the stator 2, and then the screw is inserted into the screw hole 25 and inserted into the connecting post 11 of the crankcase 1. The stator 2 is then connected to the crankcase 1 by the screw.

[0033] A winding auxiliary component 26 is provided on the end face of the stator 2 near the crankcase 1. The winding auxiliary component 26 is coaxially arranged with the stator 2. The coil of the stator 2 is wound on the winding auxiliary component 26. The winding coil connects the winding auxiliary component 26 to the stator 2, so that the coil is higher than the stator 2. In this application, when the stator 2 is connected to the connecting post 11 of the crankcase 1, part of the winding auxiliary component 26 enters the crankcase 1.

[0034] Compared to a conventional stator, the recessed mounting notch 24 shortens the screw length, reduces weight, and lowers costs. Typically, the crankcase 1 of a fixed-frequency compressor and the crankcase 1 of a variable-frequency compressor are made of different materials, differing mainly in the connecting column 11 of the crankcase 1. In this application, the connecting column 11 of the crankcase 1 is inserted into the recessed mounting notch 24 of the stator 2, breaking with conventional thinking and allowing the crankcase 1 of a fixed-frequency compressor to be used in the technical solution of this application, reducing material management. Simultaneously, when the connecting column 11 of the crankcase 1 is connected to the stator 2, the winding auxiliary component 26 of the stator 2 can, to some extent, enter the crankcase 1, minimizing the gap between the stator 2 and the crankcase 1, thereby reducing the overall height of the compressor.

[0035] The mounting notch 24 has several abutment surfaces 27 that rely on the crankcase 1. When the connecting post 11 of the crankcase 1 is inserted into the mounting notch 24, the connecting post 11 contacts the abutment surfaces 27. Through the action of the abutment surfaces 27, the crankcase 1 is not easily rotated.

[0036] Generally, the thickness of several second silicon steel sheets 23 after stacking is 10-20mm, so that the depth of the installation notch 24 is 10-20mm. The number of second silicon steel sheets 23 and the thickness after stacking are set according to the actual situation.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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 motor for a refrigerator compressor, characterized in that: Includes a stator (2) and a rotor used in conjunction with the stator (2), the stator (2) comprising a plurality of stacked iron core laminations (21). The core lamination (21) includes a first silicon steel sheet (22) with corners and a second silicon steel sheet (23) with notches at the corners. A plurality of second silicon steel sheets (23) are stacked on top of a plurality of first silicon steel sheets (22), so that the corners of the stator (2) have recessed mounting notches (24).

2. The motor for a refrigerator compressor according to claim 1, characterized in that: The mounting notch (24) has several contact surfaces (27) that abut against the crankcase (1).

3. The motor for a refrigerator compressor according to claim 1, characterized in that: The first silicon steel sheet (22) has screw holes (25).

4. The motor for a refrigerator compressor according to claim 1, characterized in that: The stacking thickness of the second silicon steel sheet (23) is 10-20 mm.

5. The motor for a refrigerator compressor according to claim 1, characterized in that: The stator (2) is provided with a winding auxiliary component (26) on the end face near the crankcase (1), and part of the winding auxiliary component (26) enters the crankcase (1).

Images