A new motor for a refrigerator compressor

Abstract

The application relates to a novel motor of 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, each of the iron core punching sheets is cylindrical, and the end face of the stator away from a crankcase is provided with a plurality of connecting sheets connected with the crankcase, the connecting sheets are arranged in a circle and are arranged at intervals. The iron core punching sheet is cylindrical, the four corners of the iron core punching sheet are removed, so that the volume of the iron core punching sheet is reduced, and the weight of the stator is reduced; and the stator is connected with the crankcase through the connecting sheets.

Description

Technical Field

[0001] This application relates to the technical field of compressor motors, and in particular to a novel 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, see Figure 1 The silicon steel sheet of the stator includes an integrally formed lamination body 5 and mounting angles 6. The lamination body has holes for the rotor 3 to pass through. There can be two, three or four mounting angles 6. Each mounting angle 6 is punched with a fixing hole 7 for a mounting screw. Several mounting angles 6 are located around the lamination body and are arranged at intervals.

[0005] Regarding the aforementioned technologies, the increased installation angle of the stator increases the area of ​​the silicon steel sheets, making the overall weight of the stator heavier. Summary of the Invention

[0006] In order to reduce the volume of the iron core laminations and lighten the weight of the stator, this application provides a novel motor for a refrigerator compressor.

[0007] This application provides a novel motor for a refrigerator compressor, which adopts the following technical solution: A novel motor for a refrigerator compressor includes a stator and a rotor that works in conjunction with the stator. The stator includes a plurality of stacked iron core laminations, each of which is cylindrical. The end face of the stator away from the crankcase is provided with a plurality of connecting plates that connect to the crankcase. The plurality of connecting plates are spaced apart and arranged in a circular pattern.

[0008] By adopting the above technical solution, the core lamination is cylindrical, and the four corners of the core lamination are removed, thereby reducing the volume of the core lamination and reducing the weight of the stator; the stator is connected to the crankcase through connecting plates.

[0009] Optionally, the connecting piece includes an integrally formed fixing part and a mounting part, the fixing part being fixedly connected to the stator, and the mounting part having a mounting hole for connecting to the crankcase.

[0010] By adopting the above technical solution, when the motor is connected to the crankcase, the connecting column of the crankcase abuts against the mounting part, and then the screw is inserted into the mounting hole and screwed into the connecting column. The connecting column is connected to the mounting part by the screw, thereby connecting the crankcase and the motor.

[0011] Optionally, the outer ring of the stator is provided with an insert block that is embedded in the crankcase.

[0012] By adopting the above technical solution, the connecting column is provided with an insert groove for inserting the insert block. When the stator is connected to the crankcase, after the connecting column abuts against the mounting part, the insert block is inserted into the insert groove, making it difficult for the crankcase to rotate, and the connection between the stator and the crankcase is more secure.

[0013] Optionally, multiple insert blocks are provided, and the multiple insert blocks are arranged at intervals around the stator.

[0014] By adopting the above technical solution, multiple insert blocks are connected to multiple connecting posts, making the connection between the stator and the crankcase more secure and stable.

[0015] Optionally, the mounting block is a dovetail block.

[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 connecting plate, 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] Optionally, the rotor includes an iron core body with a stepped hole in the middle and a plurality of magnets wound around the iron core body, wherein the upper end face of the iron core body is lower than the upper end face of the magnets.

[0019] By adopting the above technical solution, the amount of silicon steel sheets in the core body is reduced, that is, the height of the core body is reduced (reduced by 10-20mm), and the upper end face of the core body is lower than the upper end face of the magnet sheet, so that the protrusion will not rub against the core body; thus, the consumption of silicon steel sheets is reduced and the weight of the compressor is reduced.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. The core laminations are cylindrical. The four corners of the core laminations are removed to reduce the volume of the core laminations and reduce the weight of the stator. The stator is connected to the crankcase via connecting plates. 2. After the connecting column of the crankcase is connected to the connecting plate, the winding auxiliary parts 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; 3. Reduce the amount of silicon steel sheets in the core body, i.e., reduce the height of the core body (by 10-20mm), and make the upper surface of the core body lower than the upper surface of the magnet sheet so that the protrusions will not rub against the core body; thus, reduce the consumption of silicon steel sheets and lighten the weight of the compressor. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of silicon steel sheet in the background art of this application.

[0022] Figure 2 This is a schematic diagram of the structure after the crankcase and stator are connected in an embodiment of this application.

[0023] Figure 3 This is a schematic diagram of the structure after the stator and rotor are connected in an embodiment of this application.

[0024] Figure 4 This is a structural schematic diagram from another perspective of the crankcase and stator connection in an embodiment of this application.

[0025] Figure 5 This is an exploded view of the crankcase and stator in an embodiment of this application.

[0026] Figure 6 This is a schematic diagram of the rotor structure in an embodiment of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Crankcase; 11. Connecting column; 12. Protruding column; 13. Reinforcing rib; 14. Insert groove; 2. Stator; 21. Iron core lamination; 22. Winding auxiliary component; 23. Insert block; 3. Rotor; 31. Iron core body; 32. Magnet piece; 33. Stepped hole; 4. Connecting piece; 41. Fixing part; 42. Mounting part; 43. Mounting hole; 5. Lamination body; 6. Mounting angle; 7. Fixing hole. Detailed Implementation

[0028] The present application will be further described in detail below with reference to the accompanying drawings.

[0029] This application discloses a novel motor for a refrigerator compressor.

[0030] See Figure 2 In this embodiment, the refrigerator compressor is an inverter compressor. The compressor includes a motor and a crankcase 1. The crankcase 1 has four connecting columns 11. The motor is connected to the connecting columns 11 of the crankcase 1, and the crankshaft inside the crankcase 1 extends into the rotor 3 of the motor.

[0031] See Figure 2and Figure 3 The motor includes a stator 2 and a rotor 3, which work together.

[0032] Specifically, the stator 2 includes multiple stacked core laminations 21 (not shown in the diagram due to their dense stacking). The core laminations 21 are made of silicon steel sheets, and each core lamination 21 is cylindrical. Compared to the previous core laminations 21, the mounting angle 6 is reduced, and the material width of the core laminations 21 is decreased, thereby reducing the consumption of silicon steel sheets and lowering costs.

[0033] A winding auxiliary component 22 is provided on the end face of the stator 2 near the crankcase 1. The winding auxiliary component 22 is coaxially arranged with the stator 2. The coil of the stator 2 is wound on the winding auxiliary component 22. The winding auxiliary component 22 is connected to the stator 2 through the wound coil, so that the coil is higher than the stator 2.

[0034] See Figure 4 The stator 2 has several connecting pieces 4 on its end face away from the crankcase 1. These connecting pieces 4 are connected to the connecting column 11 of the crankcase 1, thereby connecting the stator 2 to the crankcase 1. The number of connecting pieces 4 is set according to the actual situation. In this embodiment, four connecting pieces 4 are provided. The four connecting pieces 4 are spaced apart and arranged in a circle with the axis of the stator 2 as the center.

[0035] Each connecting piece 4 includes an integrally formed fixing part 41 and mounting part 42. The fixing part 41 is fixedly connected to the stator 2 by screws or welding. The mounting part 42 has mounting holes 43 for screws to pass through. When the motor is connected to the crankcase 1, the connecting post 11 of the crankcase 1 abuts against the mounting part 42. Then, screws are inserted into the mounting holes 43 and screwed into the connecting post 11. The connecting post 11 is connected to the mounting part 42 by screws, thereby connecting the crankcase 1 to the motor.

[0036] When the connecting column 11 of the crankcase 1 is connected to the connecting piece 4, the winding auxiliary part 22 of the stator 2 can enter the crankcase 1 to a certain extent, minimizing the gap between the stator 2 and the crankcase 1, thereby reducing the overall height of the compressor.

[0037] See Figure 5 To ensure a more secure connection between the stator 2 and the crankcase 1, each core lamination 21 has an integrally stamped protrusion on its outer ring. Multiple core laminations 21 are stacked on top of each other, forming an insert block 23 on the outer ring of the stator. The two ends of the insert block 23 are flush with the two end faces of the stator 2. The connecting post 11 has an insert groove 14 for the insert block 23 to be inserted. When the stator 2 is connected to the crankcase 1, after the connecting post 11 abuts against the mounting part 42, the insert block 23 is engaged in the insert groove 14, making it less likely for the crankcase 1 to rotate and ensuring a more secure connection between the stator 2 and the crankcase 1.

[0038] Multiple mounting blocks 23 can be provided. In this embodiment, four mounting blocks 23 are provided, and the four mounting blocks 23 are arranged at intervals around the stator 2 with the axis of the stator 2 as the center.

[0039] Furthermore, the insert block 23 is a dovetail block with a dovetail-shaped cross section, and the insert groove is a dovetail groove; when the stator 2 is connected to the crankcase 1, the crankcase 1 moves from top to bottom toward the stator 2, and the insert block 23 slowly gets into the insert groove 14 from the opening of the dovetail groove.

[0040] See Figure 5 and Figure 6 The rotor 3 includes an iron core body 31 and magnet plates 32. The iron core body 31 is made of stacked silicon steel sheets, with a stepped hole 33 in the middle, through which the crankshaft of the crankcase 1 passes. Several magnet plates 32 are arranged around and attached to the outer ring of the iron core body 31 at intervals. The crankcase 1 has a protrusion 12 with a through hole through which the crankshaft passes. When the protrusion 12 is coaxially inserted into the stepped hole 33, the crankshaft also passes into the through hole, thus inserting the crankshaft into the rotor 3.

[0041] The actual protruding post 12 has a thicker bottom or is equipped with a reinforcing rib 13. Now, because the connecting post 11 is connected to the connecting piece 4, the gap between the stator 2 and the crankcase 1 is reduced. If it is still installed in the original way, after the protruding post 12 extends into the rotor 3, the thicker part of the bottom of the protruding post 12 or the reinforcing rib 13 will abut against the iron core body 31 and generate friction when the rotor 3 rotates.

[0042] To solve this problem, this application reduces the silicon steel sheet of the core body 31 while keeping the magnet sheet 32 ​​unchanged. Specifically, it lowers the height of the core body 31 (by 10-20 mm), and the upper surface of the core body 31 is lower than the upper surface of the magnet sheet 32, so that the protrusion 12 will not rub against the core body 31. This reduces the consumption of silicon steel sheets and lightens the weight of the compressor.

[0043] The implementation principle of a novel motor for a refrigerator compressor according to an embodiment of this application is as follows: When connecting the crankcase 1 to the motor, the stator 2 and the rotor 3 are connected in advance, and then the stator 2 is placed into the crankcase 1. The insert block 23 is inserted into the insert groove 14 from the slot and moves continuously in the insert groove 14 until the connecting column 11 abuts against the mounting part 42 of the connecting piece 4. A screw is inserted through the mounting part 42 and screwed into the connecting column 11. The crankcase 1 and the motor are connected by the screw.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A novel motor for a refrigerator compressor, characterized in that: The stator (2) includes a stator (2) and a rotor (3) used in conjunction with the stator (2). The stator (2) includes a plurality of stacked iron core laminations (21), each of which is cylindrical. The end face of the stator (2) away from the crankcase (1) is provided with a plurality of connecting pieces (4) that are connected to the crankcase (1). The plurality of connecting pieces (4) are spaced apart and arranged in a circular pattern.

2. The novel motor for a refrigerator compressor according to claim 1, characterized in that: The connecting piece (4) includes an integrally formed fixing part (41) and a mounting part (42). The fixing part (41) is fixedly connected to the stator (2), and the mounting part (42) has a mounting hole (43) for connecting to the crankcase (1).

3. A novel motor for a refrigerator compressor according to claim 1, characterized in that: The outer ring of the stator (2) is provided with an insert block (23) that is embedded in the crankcase (1).

4. A novel motor for a refrigerator compressor according to claim 3, characterized in that: Multiple insert blocks (23) are provided, and multiple insert blocks (23) are arranged at intervals around the stator (2).

5. A novel motor for a refrigerator compressor according to claim 3, characterized in that: The mounting block (23) is a dovetail block.

6. A novel motor for a refrigerator compressor according to claim 1, characterized in that: The stator (2) is provided with a winding auxiliary component (22) on the end face near the crankcase (1), and part of the winding auxiliary component (22) enters the crankcase (1).

7. A novel motor for a refrigerator compressor according to claim 1, characterized in that: The rotor (3) includes an iron core body (31) with a stepped hole (33) in the middle and a plurality of magnet pieces (32) wound around the iron core body (31). The upper end face of the iron core body (31) is lower than the upper end face of the magnet pieces (32).

Images