Motor rotor and compressor

Abstract

The utility model relates to the technical field of refrigeration equipment, in particular to a motor rotor and a compressor. An accommodating space is formed on the rotor iron core, the accommodating space circumferentially surrounds the rotor main shaft, and a balance weight assembly is arranged in the accommodating space. According to the embodiment of the invention, the counterweight is arranged in the motor rotor, so that the axial size of the compressor can be reduced, the overall size is reduced, and vibration of the compressor can be effectively inhibited.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a motor rotor and a compressor. BACKGROUND

[0002] When the piston refrigeration compressor is working, the rotor main shaft is rotated along the center axis by the motor rotor, and the rotary motion is converted into the reciprocating motion of the piston through the connecting rod connected with the eccentric connecting piece, so as to realize the compression of the refrigerant. When the rotor main shaft is rotated by the motor rotor, the rotation center is the center axis of the rotor main shaft, however, the rotation center of the eccentric connecting piece is not the above-mentioned center axis, and the gravity center of the whole of the eccentric connecting piece, the connecting rod and the piston is also not on the center axis of the rotor main shaft, thereby causing the structural parts to produce eccentric swing, resulting in vibration of the compressor.

[0003] In order to solve the problem of vibration of the compressor caused by the centrifugal force generated by the eccentric connecting piece driving the connecting rod and the piston when rotating, currently, a counterweight is usually added to the outer surface of the motor rotor or the crankshaft connecting piece, so that the overall center of mass of the motion mechanism is close to the rotor main shaft. Due to the limitation of the size of the compressor, the axial height space is limited, and the addition of the counterweight outside the motor rotor in the prior art will cause the overall size of the compressor to be too high, and insufficient counterweight will also cause the vibration of the compressor to be enhanced. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a motor rotor and a compressor, which sets the counterweight inside the motor rotor, which can not only reduce the axial size of the compressor and the overall volume, but also effectively suppress the vibration of the compressor.

[0005] The embodiment of the present application is implemented in this way:

[0006] On the one hand, the embodiment of the present application provides a motor rotor, which comprises a rotor core and a rotor main shaft; a containing space is formed on the rotor core, the containing space circumferentially surrounds the rotor main shaft, and a balance counterweight assembly is arranged in the containing space.

[0007] As an optional implementation manner, an annular groove circumferentially surrounding the rotor main shaft is formed on the rotor core, and the containing space is formed in the annular groove; the opening direction of the annular groove is consistent with the axial direction of the rotor main shaft.

[0008] As an optional implementation manner, the annular groove has two and is located at two ends of the rotor core along the extension direction of the rotor main shaft; the balance counterweight assembly has two and is respectively arranged in the two annular grooves.

[0009] As an optional implementation manner, the annular groove comprises a plurality of arc grooves, and the plurality of arc grooves are arranged at intervals around the center axis of the rotor main shaft.

[0010] As an optional implementation, the counterweight assembly comprises a plurality of counterweight blocks arranged in layers in the annular groove.

[0011] As an optional implementation, the annular groove is provided with a mounting structure for adjusting the position of the counterweight assembly, and the counterweight assembly is provided with a fixing structure connected with the mounting structure.

[0012] As an optional implementation, the mounting structure comprises at least two mounting holes formed in the annular groove, and the at least two mounting holes are arranged at intervals along the extension path of the annular groove.

[0013] In another aspect, the embodiment of the present application further provides a compressor comprising the motor rotor and the connecting rod piston assembly described above; the connecting rod piston assembly is installed at the end of the rotor main shaft away from the rotor core.

[0014] As an optional implementation, the end of the rotor main shaft is provided with an eccentric connecting piece, the eccentric connecting piece is provided with a rotating shaft, the connecting rod piston assembly comprises a connecting rod and a piston; one end of the connecting rod is connected with the rotating shaft, and the other end of the connecting rod is connected with the piston.

[0015] As an optional implementation, the compressor housing is further provided, one side of the extension direction of the connecting rod is close to the eccentric connecting piece, and the other side of the extension direction of the connecting rod is close to the inner wall of the compressor housing.

[0016] The beneficial effects of the embodiment of the present application include:

[0017] The embodiment of the present application provides a motor rotor comprising a rotor core and a rotor main shaft; the rotor core forms a containing space, the containing space circumferentially surrounds the rotor main shaft, and a counterweight assembly is arranged in the containing space. The embodiment of the present application directly adjusts the mass center distribution of the motor rotor by embedding the counterweight assembly in the rotor core, so that the overall mass center of the structure tends to the central axis when the rotor main shaft rotates, and the centrifugal force of the eccentric connecting rod mechanism is offset. The embodiment of the present application can avoid the axial space occupation of the external counterweight, and effectively reduce the overall height of the compressor. In addition, the counterweight assembly of the embodiment of the present application rotates integrally with the rotor core, the dynamic balance response is faster, and the vibration suppression effect is improved.

[0018] The embodiment of the present application further provides a compressor comprising the motor rotor and the connecting rod piston assembly described above; the connecting rod piston assembly is installed at the end of the rotor main shaft away from the rotor core. The motor rotor of the embodiment of the present application embeds the counterweight without external counterweight blocks, the eccentric connecting piece and the rotating shaft are directly integrated at the end of the main shaft, and the redundant axial space of the traditional crankshaft structure is saved. In addition, the embodiment of the present application can effectively reduce the vibration amplitude. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those of ordinary skill in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 Fig. 1 is a structural schematic diagram of a motor rotor according to an embodiment of the present application;

[0021] Figure 2 Fig. 2 is another structural schematic diagram of a motor rotor according to an embodiment of the present application;

[0022] Figure 3 Fig. 3 is a third structural schematic diagram of a motor rotor according to an embodiment of the present application;

[0023] Figure 4 Fig. 4 is a fourth structural schematic diagram of a motor rotor according to an embodiment of the present application.

[0024] Fig. 5 is a structural schematic diagram of a motor rotor according to another embodiment of the present application;

[0025] 100 - motor rotor; 101 - rotor core; 102 - rotor main shaft; 103 - balance weight assembly;

[0026] 104 - annular groove; 105 - weight block; 106 - fixing structure; 107 - mounting hole; 108 - connecting rod piston assembly; 109 - eccentric connecting piece; 110 - rotating shaft; 111 - connecting rod; 112 - piston. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art on the basis of the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0029] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] When a reciprocating refrigeration compressor is working, the motor rotor drives the rotor shaft to rotate along the central axis. This rotational motion is converted into the reciprocating motion of the piston via a connecting rod connected to an eccentric connector, thus compressing the refrigerant. While the motor rotor drives the rotor shaft to rotate, the center of rotation is the central axis of the rotor shaft. However, the center of rotation of the eccentric connector is not the aforementioned central axis, and the center of gravity of the eccentric connector, connecting rod, and piston as a whole is not on the central axis of the rotor shaft. This causes structural components to wobble, resulting in vibration of the entire compressor.

[0032] To address the compressor vibration caused by centrifugal force generated when the eccentric connector drives the connecting rod and piston during rotation, current methods typically involve adding counterweights to the outer surface of the motor rotor or crankshaft connector to bring the overall center of gravity of the moving mechanism closer to the rotor's main shaft. However, due to the limitations of the compressor's external dimensions and the limited axial height space, adding counterweights to the outside of the motor rotor in existing technologies results in an excessively tall compressor, while insufficient counterweights lead to increased compressor vibration.

[0033] To address the aforementioned technical problems, this application provides an embodiment of a motor rotor 100 and a compressor.

[0034] Reference Figure 1 and Figure 2 As shown, this application embodiment provides a motor rotor 100, including a rotor core 101 and a rotor main shaft 102; an accommodating space is formed on the rotor core 101, the accommodating space surrounds the rotor main shaft 102 in the circumferential direction, and a balance counterweight assembly 103 is disposed in the accommodating space.

[0035] It should be noted that a circumferentially surrounding space is formed on the rotor core 101 around the rotor main shaft 102. This space can be used to accommodate the counterweight assembly 103 without increasing the external dimensions of the compressor, thus optimizing the use of internal space.

[0036] The accommodation space can be formed by a hollow chamber or a groove structure.

[0037] The accommodation space of the embodiment of the present application is directly embedded in the rotor core 101, avoiding the axial space occupation of the external counterweight, and breaking through the height limitation of the compressor caused by the traditional external counterweight. The circumferential surrounding design allows the balance weight assembly 103 to be distributed at multiple angles in the circumferential direction, facilitating accurate adjustment of the mass center position and adapting to the balance requirements of different eccentric conditions.

[0038] It should be noted that the balance weight assembly 103 is arranged in the accommodation space, and the balance weight assembly 103 can rotate synchronously with the rotor core 101.

[0039] The embodiment of the present application can realize dynamic correction of the mass center. The balance weight assembly 103 is directly integrated in the rotor core 101. By adjusting the mass distribution of the balance weight assembly 103, the overall mass center of the motor rotor 100 tends to approach the central axis of the rotor shaft 102, offsetting the centrifugal force of the eccentric connecting rod 111 mechanism and suppressing vibration from the vibration source. The balance weight assembly 103 of the embodiment of the present application rotates integrally with the rotor core 101, without the need for additional transmission links, real-time synchronous compensation of centrifugal force, faster response speed, and significantly improved vibration suppression effect.

[0040] The embodiment of the present application can realize lightweight structure. By embedding the counterweight, the traditional external counterweight block 105 can be replaced, and part of the redundant structure inside the rotor core 101 can also be replaced, reducing the overall weight and improving energy efficiency.

[0041] The person skilled in the art can arrange the accommodation space and the rotor shaft 102 coaxially according to the need, and the balance weight assembly 103 is symmetrically distributed around the shaft.

[0042] It should be noted that the symmetric distribution of the balance weight assembly 103 can eliminate the radial unbalanced moment during rotation, reduce the additional load of the shaft bearing, and prolong the service life. The above-mentioned arrangement of the embodiment of the present application is beneficial to improving the thermal stability of the structure. The built-in balance weight assembly 103 avoids the problem of thermal deformation caused by temperature change of the external counterweight, and ensures the stability of long-term operation.

[0043] The person skilled in the art can adjust or modularize the balance weight assembly 103 according to the need, such as increasing or decreasing the counterweight block 105 and adjusting the installation angle. It should be noted that the embodiment of the present application can flexibly adjust the counterweight according to the eccentric mechanism parameters of different compressor models, and has strong universality.

[0044] It should be noted that the balancing counterweight component 103 in this embodiment can be made of high-density materials, such as tungsten alloy blocks or lead blocks. High-density materials provide greater mass within a limited space, reduce volume occupation, and further improve the balancing effect.

[0045] Compared to traditional technologies, the embodiments of this application feature space compression, eliminating external counterweights and reducing the axial height of the compressor to meet the requirements of compact equipment. The embodiments of this application improve the accuracy of center of gravity correction, effectively reduce vibration amplitude, and significantly lower noise levels. The embodiments of this application can reduce vibration energy loss, improve mechanical efficiency, and extend bearing life. Furthermore, the embodiments of this application can reduce the processing and installation of external counterweights, lowering manufacturing costs.

[0046] This embodiment of the application directly adjusts the center of mass distribution of the motor rotor 100 by embedding the counterweight assembly inside the rotor core 101. This makes the overall center of mass of the structure approach the central axis when the rotor main shaft 102 rotates, thus counteracting the centrifugal force of the eccentric connecting rod 111 mechanism. This embodiment of the application avoids the axial space occupation of external counterweights, effectively reducing the overall height of the compressor. In addition, the balance counterweight assembly 103 of this embodiment of the application rotates integrally with the rotor core 101, resulting in faster dynamic balance response and improved vibration suppression effect.

[0047] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, as an optional implementation, an annular groove 104 is formed on the rotor core 101, which surrounds the rotor main shaft 102 in a circumferential direction, and an accommodating space is formed in the annular groove 104; the opening direction of the annular groove 104 is consistent with the axial direction of the rotor main shaft 102.

[0048] It should be noted that, in this embodiment of the application, an annular groove 104 is formed on the rotor core 101, circumferentially surrounding the rotor main shaft 102. The groove is continuously or segmented along the circumferential direction, forming an annular placement space coaxial with the main shaft. The opening direction of the annular groove 104 is consistent with the axial direction of the rotor main shaft 102, that is, the groove extends axially and the opening faces the rotor end face, such as the upper and lower end faces.

[0049] In this embodiment, the counterweight assembly 103 is embedded in the annular groove 104, and can be continuously distributed or symmetrically arranged in segments along the circumference of the annular groove 104. In this embodiment, the annular groove 104 can be designed to be coaxial with the rotor spindle 102 to ensure that the rotation trajectory of the counterweight assembly is consistent with the rotation center of the spindle.

[0050] Technical effects of the embodiments of this application:

[0051] The embodiments of this application improve assembly convenience. The opening direction of the annular groove 104 is consistent with the axis of the main shaft, allowing the counterweight assembly to be directly embedded into the groove from the rotor end face. The balance counterweight assembly 103 can be inserted axially, greatly simplifying the assembly process. The effects of the embodiments of this application are to reduce the complexity of the production process and improve production efficiency.

[0052] This embodiment of the application compresses the axial space and distributes the counterweight assembly 103 axially, making full use of the radial space of the rotor core 101 and avoiding the additional occupation of the compressor height by the traditional axial external counterweight block 105. This embodiment of the application enables a further reduction in the overall height of the compressor, adapting to the needs of modern equipment, such as small large-capacity refrigerators and portable refrigeration devices.

[0053] In this embodiment, the annular groove 104 surrounds the main shaft circumferentially, allowing the counterweight components to be evenly distributed along the circumference, forming symmetrical mass compensation and precisely counteracting the centrifugal force generated by the eccentric mechanism. The annular groove 104 allows the counterweight components 103 to be flexibly added or removed at different angular positions, such as by installing high-density alloy blocks in sections to adapt to the balance requirements under different operating conditions. This embodiment enhances the adaptability of the compressor and can dynamically optimize the vibration suppression effect for different speeds or loads. For example, multiple counterweight components 103 are arranged circumferentially at intervals within the annular groove 104.

[0054] The embodiments of this application can avoid the risk of external counterweight falling off by using the built-in balance counterweight component 103, which is suitable for industrial scenarios that are sensitive to vibration or operate continuously for a long time.

[0055] Reference Figure 3 As shown, in one optional embodiment, there are two annular grooves 104, located at both ends of the rotor core 101 along the extension direction of the rotor main shaft 102; there are two counterweight assemblies 103, which are respectively disposed in the two annular grooves 104. The annular grooves 104 include multiple arc-shaped grooves, which are arranged at intervals around the central axis of the rotor main shaft 102.

[0056] It should be noted that, in this embodiment of the application, two annular grooves 104 are respectively formed at both ends of the rotor core 101 along the main shaft extension direction, such as the upper and lower ends, to form symmetrically distributed accommodating spaces. Each annular groove 104 is composed of multiple arc-shaped grooves, which are arranged at intervals around the central axis of the main shaft to form a discontinuous annular structure. For example, the annular groove 104 can be divided into 4-8 arc-shaped grooves distributed at equal angles.

[0057] The two balance weight assemblies 103 are respectively embedded in the two annular grooves 104, each of which contains a plurality of independent weight units matched with the arc-shaped grooves, such as arc-shaped weight blocks 105. The weight units are distributed at interval positions along the annular grooves 104, and the number and angle of the weight units can be selectively filled or adjusted.

[0058] It should be noted that the balance weight assemblies of the two annular grooves 104 at both ends form a symmetrical mass distribution, which can simultaneously compensate for the centrifugal force generated by the eccentric mechanism at different axial positions and eliminate the axial eccentricity torque caused by insufficient weight on one side. The effect achieved is that the vibration amplitude of the compressor is further reduced, the radial and axial loads of the main shaft bearing are balanced, and the service life is prolonged.

[0059] It should be noted that the embodiment of the present application improves the flexibility of adjustment through split arc-shaped groove design. Each annular groove 104 is composed of a plurality of arc-shaped grooves arranged at intervals, allowing the number of weight units to be increased or decreased at specific angular positions. For example, only weight blocks 105 are added in the direction of maximum centrifugal force. The effect achieved is that the balance adjustment precision is improved, and directional compensation can be performed for different compressor model eccentric mechanism parameters, with stronger adaptability.

[0060] Among them, the interval design of the arc-shaped grooves makes the weight units discontinuously distributed, avoiding the overall mass of the rotor core 101 being too large due to full-circle weighting, and achieving the dual goals of "precise vibration reduction + lightweight". The embodiment of the present application can reduce the rotor moment of inertia, improve the motor start-stop response speed, and be beneficial to energy saving.

[0061] The embodiment of the present application optimizes space utilization through an axial double-groove structure, so that the radial space is released. The weight mass is dispersed to both ends of the rotor along the axial direction, avoiding the increase of the rotor radial size caused by unilateral weight concentration. The embodiment of the present application reduces the radial space occupation of the compressor, which is suitable for narrow installation environment.

[0062] It should be noted that different arc-shaped grooves can be filled with weight blocks 105 of different densities, such as tungsten alloy weight blocks 105 at one end and lead-based weight blocks 105 at the other end, to adapt to the contradiction between space and weight demand. In a limited groove volume, better centroid correction is achieved.

[0063] The embodiment of the present application realizes high-precision and high-flexibility dynamic balance adjustment in a limited space through the design of axial double-groove + split arc-shaped weight, which is especially suitable for advanced refrigeration compressors with strict requirements on space, noise and working condition adaptability, and provides core technical support for the next generation of ultra-compact and low-vibration refrigeration systems.

[0064] For example, with reference to Figure 3As shown, the balance weight assembly 103 comprises a plurality of balance weights 105 arranged in a stack in the annular groove 104. The specific material of the balance weights 105 can be selected by those skilled in the art as required.

[0065] With reference to Figure 2 As an optional embodiment, the annular groove 104 is provided with a mounting structure for adjusting the position of the balance weight assembly 103, and the balance weight assembly 103 is provided with a fixing structure 106 connected with the mounting structure.

[0066] The mounting structure comprises at least two mounting holes 107 formed in the annular groove 104, and the at least two mounting holes 107 are arranged at intervals along the extension path of the annular groove 104.

[0067] It should be noted that the mounting holes 107 can be a plurality of circular holes arranged at intervals, and the fixing structure 106 is a bolt or a locking pin structure. The position adjustment of the balance weight assembly 103 can be realized by fixing the balance weight assembly 103 on the circular holes at different positions through the bolts.

[0068] It should be noted that the mounting holes 107 can also be arranged as waist-shaped holes to facilitate position adjustment.

[0069] It should be noted that with reference to Figure 4 As shown, a small number of balance weights 105 can also be arranged outside the motor rotor 100 as required, and the vibration control of the compressor can be realized in combination with the built-in balance weight 105 scheme.

[0070] With reference to Figure 1 In order to Figure 4 As shown, the application further provides a compressor comprising the above motor rotor 100 and a connecting rod piston assembly 108; the connecting rod piston assembly 108 is installed at the end of the rotor shaft 102 away from the rotor core 101.

[0071] The end of the rotor shaft 102 is provided with an eccentric connecting piece 109, the eccentric connecting piece 109 is provided with a rotating shaft 110, and the connecting rod piston assembly 108 comprises a connecting rod 111 and a piston 112; one end of the connecting rod 111 is connected with the rotating shaft 110, and the other end is connected with the piston 112.

[0072] The compressor further comprises a compressor housing, one side of the extension direction of the connecting rod 111 is close to the eccentric connecting piece 109, and the other side of the extension direction is close to the inner wall of the compressor housing.

[0073] The compression and the above-mentioned motor rotor 100 of the embodiment of the present application have a built-in double annular groove 104 counterweight to offset the centrifugal force of the eccentric mechanism, and the offset amount of the rotation center of the eccentric connecting piece 109 and the center axis of the main shaft is accurately controlled. The motor rotor 100 of the embodiment of the present application has a built-in counterweight without an external counterweight block 105, the eccentric connecting piece 109 and the rotating shaft 110 are directly integrated at the end of the main shaft, and the redundant axial space of the traditional crankshaft structure is saved. In addition, the embodiment of the present application can effectively reduce the vibration amplitude.

[0074] It should be noted that the embodiment of the present application is used for an ultra-thin household refrigerator, and can utilize the axial height compression characteristics to adapt to the narrow space at the back of the refrigerator, and reduce the thickness of the whole machine. It is also suitable for new energy automobile air conditioners and industrial low-temperature refrigerators.

[0075] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An electric machine rotor, characterized in that, The rotor core (101) is provided with a containing space which circumferentially surrounds the rotor main shaft (102), and the balance weight assembly (103) is arranged in the containing space.

2. The electric machine rotor of claim 1, wherein, The rotor core (101) is provided with an annular groove (104) which circumferentially surrounds the rotor main shaft (102), and the containing space is formed in the annular groove (104); the opening direction of the annular groove (104) is consistent with the axial direction of the rotor main shaft (102).

3. The motor rotor of claim 2, wherein, The annular groove (104) is provided with two annular grooves which are respectively arranged at the two ends of the rotor core (101) along the extension direction of the rotor main shaft (102); the balance weight assembly (103) is provided with two balance weight assemblies which are respectively arranged in the two annular grooves (104).

4. The motor rotor of claim 2, wherein, The annular groove (104) is provided with a plurality of arc grooves which are arranged at intervals around the central axis of the rotor main shaft (102).

5. The electrical machine rotor according to any of claims 2-4, characterized in that, The balance weight assembly (103) is provided with a plurality of balance weight blocks (105) which are arranged in the annular groove (104) in a stacked manner.

6. The electrical machine rotor according to any of claims 2-4, characterized in that, The annular groove (104) is provided with a mounting structure which is used for adjusting the position of the balance weight assembly (103), and the balance weight assembly (103) is provided with a fixing structure (106) which is connected with the mounting structure.

7. The electric machine rotor of claim 6, wherein, The mounting structure is provided with at least two mounting holes (107) which are arranged in the annular groove (104) at intervals along the extension path of the annular groove (104).

8. A compressor characterized by, The motor rotor (100) is provided with a connecting rod piston assembly (108) which is arranged at the end of the rotor main shaft (102) which is away from the rotor core (101).

9. The compressor of claim 8, wherein, The end of the rotor main shaft (102) is provided with an eccentric connecting piece (109), the eccentric connecting piece (109) is provided with a rotating shaft (110), the connecting rod piston assembly (108) is provided with a connecting rod (111) and a piston (112), one end of the connecting rod (111) is connected with the rotating shaft (110), and the other end of the connecting rod (111) is connected with the piston (112).

10. The compressor of claim 9, wherein, The compressor housing is further provided, and one side of the connecting rod (111) is close to the eccentric connecting piece (109), and the other side of the connecting rod (111) is close to the inner wall of the compressor housing.

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