Air cylinder assembly and compressor

Abstract

The invention provides an air cylinder assembly and a compressor. The air cylinder assembly comprises a crankshaft, a rotor iron core, a balance block and an air cylinder body. The crankshaft sequentially penetrates through the air cylinder body and the rotor iron core, and a containing cavity is formed between the air cylinder body and the rotor iron core. The balance block is connected with the rotor iron core and at least provided with a first eccentric part, and the mass center of the first eccentric part is located in the containing cavity; the first eccentric part comprises an annular extending section and a protruding section, the annular extending section extends outwards in the radial direction of the crankshaft, the protruding part is arranged at the end, away from the crankshaft, of the annular extending section, and an angle is formed between the extending direction of the protruding part and the extending direction of the annular extending section. According to the configuration, the first eccentric part comprising the annular extending section and the protruding section is arranged on the balance block, so that the mass center of the first eccentric part moves downwards, the size or mass of the original upper balance block and the original lower balance block can be reduced, the layout in the compressor is more compact, and the height of the compressor can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of compressors, in particular to a cylinder assembly and a compressor. Background Art

[0002] Currently, rolling rotor compressors are often compared with scroll compressors and piston compressors in the fields of refrigeration and freezing and automotive use. However, only horizontal models of rolling rotor compressors can meet the height requirements, but they cannot be well adapted in the length direction. Therefore, the vertical models of rolling rotor compressors need to be lowered in height. However, the current universal rotor lower balancing block of single-cylinder rolling rotor compressors has become an obstacle to the compressor height reduction.

[0003] by Figure 1 and Figure 2 For example, no matter whether the upper bearing spoke bracket is welded and fixed or the cylinder spoke bracket is welded and fixed, after the rotor is clamped and fixed to the crankshaft, the rotor moves downward, and the eccentricity of the rotor lower balance block and the crankshaft decreases. When the distance between the upper balance block and the lower balance block relative to the crankshaft remains unchanged, the mass needs to be increased to meet the balance. The easiest way to increase the mass is to increase the height along the axial direction of the shell. Therefore, the lower balance block in the prior art limits the development of the compressor towards a more compact internal configuration structure layout. Summary of the Invention

[0004] The object of the present invention is to provide a cylinder assembly and a compressor to solve the problem in the prior art that the lower balancing block limits the height reduction of the compressor, affecting the development of the compressor to a more compact internal configuration structure layout.

[0005] In order to achieve the above object, the present invention provides a cylinder assembly, comprising: a crankshaft, a rotor core, a balancing block and a cylinder body;

[0006] The crankshaft is sequentially passed through the cylinder body and the rotor core, the cylinder body is arranged on one side of the rotor core along the axial direction of the crankshaft, and an accommodating cavity is formed between the cylinder body and the rotor core;

[0007] The balancing block is connected to the rotor core, and the balancing block has at least a first eccentric portion, and the center of mass of the first eccentric portion is located in the accommodating cavity;

[0008] The first eccentric portion includes an annular extension section and a protruding section. The annular extension section extends outward in the radial direction of the crankshaft. The protruding section is arranged at one end of the annular extension section away from the crankshaft, and the extension direction of the protruding section is arranged at an angle to the extension direction of the annular extension section.

[0009] Optionally, the balancing block also has a second eccentric portion and a third eccentric portion, the second eccentric portion and the first eccentric portion are both arranged on the side of the rotor core close to the cylinder body, the second eccentric portion is connected to the annular extension section, and is arranged on the surface of the rotor core close to the cylinder body; the third eccentric portion is arranged on the surface of the rotor core away from the cylinder body.

[0010] Optionally, the second eccentric portion and the third eccentric portion are respectively protruding relative to the surface of the rotor core, and the second eccentric portion and the third eccentric portion are respectively arranged on both sides of the crankshaft along the radial direction of the crankshaft.

[0011] Optionally, the cylinder assembly further comprises a housing and an upper bearing;

[0012] The upper bearing is arranged on a side of the cylinder body close to the rotor core, and the upper bearing or the cylinder body is welded to the shell.

[0013] Optionally, the first eccentric portion includes at least one protruding segment, and the protruding segment and the second eccentric portion are located on the same side of the crankshaft along the radial direction of the crankshaft.

[0014] Optionally, the first eccentric portion includes two protruding segments, which are respectively located on both sides of the crankshaft along the radial direction of the crankshaft, and one of the protruding segments and the second eccentric portion are located on the same side of the crankshaft along the radial direction of the crankshaft, and the other protruding segment and the third eccentric portion are located on the same side of the crankshaft along the radial direction of the crankshaft.

[0015] Optionally, the cylinder assembly further comprises a housing and a lower bearing;

[0016] The lower bearing is arranged on a side of the cylinder body away from the rotor core, and the lower bearing is welded to the housing.

[0017] Optionally, the first eccentric portion includes two protruding segments, and the two protruding segments are respectively located on both sides of the crankshaft along the radial direction of the crankshaft.

[0018] Optionally, the protruding section protrudes outward in a direction close to the cylinder body.

[0019] In order to achieve the above object, the present invention also provides a compressor comprising the cylinder assembly as described above.

[0020] Compared with existing balancing blocks, the cylinder assembly and compressor provided by this application have the following advantages:

[0021] The cylinder assembly provided by the present application provides a first eccentric portion including an annular extension section and a protruding section on the balancing block, and moves the center of mass of the first eccentric portion downwardly between the rotor core and the cylinder body. Compared with existing balancing blocks, this can increase the counterweight of the lower balancing block, thereby increasing the moment of inertia and achieving a vibration reduction effect. At the same time, the addition of the first eccentric portion can also reduce the volume and mass of the original upper balancing block (equivalent to the third eccentric portion in the present application) and the lower balancing block (equivalent to the second eccentric portion in the present application), thereby making the internal layout of the compressor more compact and reducing the height of the compressor.

[0022] Furthermore, when the center of mass of the first eccentric portion is lower than the center of constraint of the upper bearing on the long axis of the crankshaft, a trend toward a dual-rotor balancing effect can be achieved; when the axial distance of the first eccentric portion is closer to the eccentric portion of the crankshaft and the center of the piston, the axial distance from the first eccentric portion to the eccentric portion of the crankshaft is shortened relative to the axial distance from the third eccentric portion to the eccentric portion of the crankshaft, which can further reduce the mass and volume of the second and third eccentric portions; when the center of mass of the first eccentric portion and the combined center of mass of the crankshaft and the piston reach static equilibrium, the second and third eccentric portions can be directly eliminated, thereby further compressing the internal layout of the compressor and making it more compact;

[0023] Furthermore, the first eccentric portion is located between the cylinder body and the rotor core, and through the arrangement of the annular extension section and multiple protruding sections, a semi-enclosed cavity is formed between the cylinder body, which can increase the rotor counterweight, improve axial vibration, and also play a role in physically isolating noise, thereby being able to cancel the muffler while compensating for the noise reduction of the absence of a muffler. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the welding fixation of the upper bearing spoke bracket in the prior art;

[0025] Figure 2 This is a schematic diagram of the welding and fixing form of the cylinder spoke bracket in the prior art;

[0026] Figure 3 A schematic diagram of the positional relationship of the center of mass of the first eccentric portion provided in an embodiment of the present invention;

[0027] Figure 4 A schematic structural diagram of a first cylinder assembly provided in an embodiment of the present invention;

[0028] Figure 5 A schematic structural diagram of a second cylinder assembly provided in an embodiment of the present invention;

[0029] Figure 6 A schematic structural diagram of a third cylinder assembly provided in an embodiment of the present invention;

[0030] The description of each reference numeral is as follows:

[0031] 10-crankshaft; 11-rotor core;

[0032] 12-balance block; 121-first eccentric portion; 122-second eccentric portion; 123-third eccentric portion; 1211-annular extension section; 1212-protruding section;

[0033] 13 - Cylinder body; 14 - Accommodation chamber; 15 - Housing; 16 - Upper bearing; 17 - Lower bearing; 18 - Piston; 19 - Notch; 20 - Refrigerant hole; 21 - Upper balance block; 22 - Lower balance block;

[0034] X-axial direction; Y-radial direction. DETAILED DESCRIPTION

[0035] To make the objects, advantages, and features of the present invention more clearly apparent, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale. They are only used to conveniently and clearly assist in illustrating the purposes of the embodiments of the present invention. In addition, the structures shown in the drawings are often part of the actual structure. In particular, different drawings may need to illustrate different focuses and sometimes use different scales.

[0036] As used in this specification, the singular forms "a", "an", and "the" include plural referents, the term "or" is generally used to include "and / or", the term "several" is generally used to include "at least one", and the term "at least two" is generally used to include "two or more". In addition, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first", "second", and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "proximal end" and "distal end" generally refer to two corresponding parts, which include not only endpoints, and the terms "mounted", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between two elements. In addition, as used in this specification, an element disposed on another element generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the connection, coupling, cooperation or transmission between the two elements may be direct or indirect through an intermediate element, and it cannot be understood as indicating or implying a spatial positional relationship between the two elements, that is, one element may be in any orientation such as inside, outside, above, below or to one side of another element, unless otherwise clearly indicated in the content. The terms "upper", "lower", "top" and "bottom" are generally relative positional relationships arranged in the direction of gravity; the terms "vertical" and "vertical direction" generally refer to the direction of gravity, which is generally perpendicular to the ground, and "horizontal" and "horizontal plane direction" generally refer to the direction parallel to the ground; for ordinary technicians in this field, the specific meanings of the above terms in this specification can be understood according to specific circumstances.

[0037] The object of the present invention is to provide a cylinder assembly and a compressor to solve the problem in the prior art that the lower balancing block limits the height reduction of the compressor, affecting the development of the compressor to a more compact internal configuration structure layout.

[0038] Those skilled in the art will understand that in existing compressors, upper and lower balancing blocks are usually used, and are respectively arranged on both sides of the rotor core along the axial direction of the crankshaft, and are also respectively arranged on both sides of the crankshaft along the radial direction of the crankshaft, so as to achieve balance. Figure 1 and Figure 2For example, after the rotor core 11 and the crankshaft 10 are clamped and fixed, the eccentric distance between the lower balancing block 22 and the crankshaft 10 is shorter, and the lever arm is correspondingly reduced. When the relative position between the upper balancing block 21 and the lower balancing block 22 remains unchanged, the weight of the lower balancing block 22 needs to be increased to meet the balancing requirement. The weight of the lower balancing block 22 is closely related to its density and volume. Without changing the material of the lower balancing block 22, the only way to increase its weight is to increase the volume of the lower balancing block 22. Regardless of whether the upper bearing spoke bracket is welded and fixed or the cylinder spoke bracket is welded and fixed, increasing the volume of the lower balancing block 22 will inevitably occupy more axial space, thereby affecting the height of the compressor, making it impossible for the compressor to develop into a more compact layout structure. Based on this, the present application provides a rotor assembly and a compressor, which reduces the volume of the original upper and lower balancing blocks by setting a first eccentric portion having an annular extension section and a protruding section, and moving the center of mass of the first eccentric portion downward and setting it between the rotor core and the cylinder body, thereby effectively avoiding the restriction of the lowering of the compressor by the lower balancing block, so that a more compact layout design can be achieved inside the compressor.

[0039] Please refer to Figures 3 to 6 The present invention provides a cylinder assembly, comprising: a crankshaft 10, a rotor core 11, a balancing weight 12 and a cylinder body 13; the crankshaft 10 is sequentially passed through the cylinder body 13 and the rotor core 11, the cylinder body 13 is arranged on one side of the rotor core 11 along the axial direction X of the crankshaft 10, and a accommodating cavity 14 is formed between the cylinder body 13 and the rotor core 11; the balancing weight 12 is connected to the rotor core 11, and the balancing weight 12 has at least a first eccentric portion 121, and the center of mass of the first eccentric portion 121 is located in the accommodating cavity 14; the first eccentric portion 121 includes an annular extension section 1211 and a protruding section 1212, the annular extension section 1211 extends outward along the radial direction Y of the crankshaft 10, the protruding section is arranged at the end of the annular extension section 1211 away from the crankshaft 10, and the extending direction of the protruding section is arranged at an angle to the extending direction of the annular extension section 1211. It should be noted that, in this embodiment, the first eccentric portion 121 is usually provided on the original lower balancing block 22 (in Figures 3 to 6 The second eccentric portion 122 is located in the middle, and the original upper balance block 21 is Figures 3 to 6 The third eccentric portion 123 in Figure 3In the illustrated example, the first eccentric portion 121 is provided with an annular extension section 1211 extending outward along the radial direction Y of the crankshaft 10. A protruding section 1212 is provided at the end of the annular extension section 1211 away from the crankshaft 10. Therefore, the eccentricity L1 of the first eccentric portion 121 is greater than the eccentricity L2 of the existing second eccentric portion 122. While maintaining static balance, the mass or volume of the existing second eccentric portion 122 and third eccentric portion 123 can be reduced. When the protruding section 1212 of the first eccentric portion 121 is coplanar with the crankshaft 10 or piston 18, the center of mass of the first eccentric portion 121 and the combined center of mass of the crankshaft 10 and piston 18 meet the static balance requirement. In this case, the second eccentric portion 122 and third eccentric portion 123 can be eliminated, and only the first eccentric portion 121 can be provided.

[0040] As an optional embodiment, by configuring the first eccentric portion 121 as an end ring member comprising an annular extension section 1211 and a protruding section 1212, the counterweight of the rotor core 11 is increased, while the moment of inertia is also increased, thereby achieving a vibration reduction effect. As those skilled in the art will understand, moment of inertia is a measure of the inertia of a rigid body when rotating about an axis, and its value depends on the object's shape, mass distribution, and the position of the axis of rotation. Inertia is the property of a rotating object to maintain uniform circular motion or remain stationary. For example, for an annular cylinder, the larger the ratio of its inner diameter to its outer diameter, the better its rotational balance performance. In this configuration, the first eccentric portion 121 is set as an end ring component, which can increase the counterweight of the rotor core 11 and at the same time increase the moment of inertia, having a similar effect to a gyroscope, and can correct the rotation path of the compressor during operation, thereby reducing vibration; in addition, the setting of the first eccentric portion 121 increases the eccentric distance, so that the mass or volume of the original second eccentric portion 122 and the third eccentric portion 123 can also be reduced, further realizing the compact layout of the internal structure of the compressor.

[0041] Please continue to refer to Figures 3 to 6In an optional embodiment, the balancing weight 12 further includes a second eccentric portion 122 and a third eccentric portion 123. The second eccentric portion 122 and the first eccentric portion 121 are both disposed on a side of the rotor core 11 close to the cylinder body 13. The second eccentric portion 122 is connected to the annular extension 1211 and disposed on a surface of the rotor core 11 close to the cylinder body 13; the third eccentric portion 123 is disposed on a surface of the rotor core 11 away from the cylinder body 13. Furthermore, the second eccentric portion 122 and the third eccentric portion 123 are each disposed protruding relative to the surface of the rotor core 11 and are disposed on both sides of the crankshaft 10 along the radial direction Y of the crankshaft 10. It should be noted that the second eccentric portion 122 in this embodiment is equivalent to the lower balancing weight 22 in the prior art, and the third eccentric portion 123 is equivalent to the upper balancing weight 21 in the prior art. Both are respectively disposed on either side of the rotor core 11 along the axial direction X of the crankshaft 10, and are also respectively disposed on either side of the crankshaft 10 along the radial direction Y of the crankshaft 10, and both protrude from the surface of the rotor core 11. With this configuration, the second eccentric portion 122 and the third eccentric portion 123 can generate relative eccentric torque when the rotor core 11 begins to rotate driven by the crankshaft 10, thereby balancing the torque generated during rotation and reducing the probability of compressor damage.

[0042] Please refer to Figures 4 and 5 , the cylinder assembly also includes a housing 15 and an upper bearing 16; the upper bearing 16 is arranged on the side of the cylinder body 13 close to the rotor core 11, and the upper bearing 16 or the cylinder body 13 is welded to the housing 15. Furthermore, the first eccentric portion 121 includes at least one protruding segment 1212, and the protruding segment 1212 and the second eccentric portion 122 are located on the same side of the crankshaft 10 along the radial direction Y of the crankshaft 10. Further, the first eccentric portion 121 includes two protruding segments 1212, and the two protruding segments 1212 are respectively located on both sides of the crankshaft 10 along the radial direction Y of the crankshaft 10, and one of the protruding segments 1212 and the second eccentric portion 122 are located on the same side of the crankshaft 10 along the radial direction Y of the crankshaft 10, and the other protruding segment 1212 and the third eccentric portion 123 are located on the same side of the crankshaft 10 along the radial direction Y of the crankshaft 10. As an alternative embodiment, in Figure 4In the illustrated example, the upper bearing 16 is welded to the housing 15, and the balancing weight 12 is provided with a first eccentric portion 121, a second eccentric portion 122, and a third eccentric portion 123. The first eccentric portion 121 is connected to the second eccentric portion 122, and an annular extension 1211 of the first eccentric portion 121 extends outward from the end of the second eccentric portion 122 away from the rotor core 11, causing the center of mass of the first eccentric portion 121 to extend toward the inner wall of the housing 15 in the radial direction Y, thereby increasing the eccentricity. The protruding portion 1212 is provided to further extend the center of mass downward in the axial direction X, thereby reducing the eccentricity of the first eccentric portion 121 and the axial distance X between the eccentric center of mass and the combined eccentric center of mass of the eccentric portion of the crankshaft 10 and the piston 18. By appropriately adjusting the volume or mass of the first eccentric portion 121, overall balance can be achieved and vibration reduced. At the same time, increasing the volume or mass of the first eccentric portion 121 can also correspondingly reduce the volume or mass of the second eccentric portion 122 and the third eccentric portion 123 in the prior art, thereby achieving the effect of reducing the overall height of the compressor, so that the internal structure of the compressor can achieve a more compact layout. Figure 4 In the embodiment, the protruding section 1212 is only provided at one end of the annular extension section 1211. In other embodiments, two protruding sections 1212 may be symmetrically provided along the radial direction Y of the crankshaft 10. Those skilled in the art may reasonably configure the number of the protruding sections 1212 according to the actual stress conditions.

[0043] Accordingly, in another alternative embodiment, please refer to Figure 5 The cylinder body 13 is welded to the housing 15, and the balancing block 12 is provided with a first eccentric portion 121, a second eccentric portion 122 and a third eccentric portion 123, wherein the first eccentric portion 121 is connected to the second eccentric portion 122, and the annular extension section 1211 of the first eccentric portion 121 extends outward from one end of the second eccentric portion 122 away from the rotor core 11, and a protruding section 1212 is provided at one end of the annular extension section 1211, so that the center of mass of the first eccentric portion 121 moves downward, achieving the purpose of reducing the volume or mass of the second eccentric portion 122 and the third eccentric portion 123 in the prior art, thereby realizing a compact layout of the compressor. Figure 5In the embodiment, the protruding section 1212 is provided only at one end of the annular extension section 1211. In other embodiments, two protruding sections 1212 may be symmetrically provided along the crankshaft 10, and this embodiment does not limit this. It should be noted that because the upper bearing 16 is closer to the rotor core 11 than the cylinder body 13, when the upper bearing 16 is welded to the housing 15, the extension space of the protruding section 1212 is smaller than the extension space when the cylinder body 13 is welded to the housing 15. That is, when the upper bearing 16 is welded to the housing 15, the center of mass of the first eccentric portion 121 is higher than the center of mass of the first eccentric portion 121 when the cylinder body 13 is welded to the housing 15. Therefore, the height-lowering effect of the upper bearing 16 on the compressor when welded to the housing 15 is not as good as the height-lowering effect of the compressor when the cylinder body 13 is welded to the housing 15.

[0044] Please refer to Figure 6 As an optional embodiment, the cylinder assembly further includes a housing 15 and a lower bearing 17; the lower bearing 17 is disposed on the side of the cylinder body 13 away from the rotor core 11, and the lower bearing 17 is welded to the housing 15. Furthermore, the first eccentric portion 121 includes two protruding sections 1212, and the two protruding sections 1212 are respectively located on both sides of the crankshaft 10 along the radial direction Y of the crankshaft 10. It should be noted that in Figure 6 In the illustrated example, the lower bearing 17 is welded to the housing 15, and the balancing weight 12 is provided with a first eccentric portion 121, a second eccentric portion 122, and a third eccentric portion 123. Under certain conditions (for details, refer to the following description), only the first eccentric portion 121 may be provided. Since the distance between the lower bearing 17 and the rotor core 11 is relatively far, the extension space left for the protruding section 1212 is relatively large. Therefore, when the lower bearing 17 is welded to the housing 15, the first eccentric portion 121 is provided. Figure 4 and Figure 5 The examples shown in the embodiment have more technical effects, as follows:

[0045] 1) with Figure 4 and Figure 5 Compared with the shown example, the center of mass of the first eccentric portion 121 can be further moved downward, which can not only further increase the counterweight of the rotor core 11 and increase the moment of inertia to maintain stability during rotation, but also reduce the volume or mass of the second eccentric portion 122 and the third eccentric portion 123; the center of mass of the first eccentric portion 121 can be lower than the constraint center of the upper bearing 16 on the long axis of the crankshaft 10, which can develop towards a dual-rotor balancing effect, and the closer the center of mass of the first eccentric portion 121 is to the center of the eccentric portion of the crankshaft 10 and the piston 18 in the axial direction X, the eccentric distance can be shortened, and the mass or volume of the second eccentric portion 122 and the third eccentric portion 123 can be further reduced.

[0046] 2) When the center of mass of the first eccentric portion 121 is on the same horizontal plane as the eccentric portion of the crankshaft 10 or the piston 18, the center of mass of the first eccentric portion 121 and the combined center of mass of the crankshaft 10 and the piston 18 meet the static balance condition, and the second eccentric portion 122 and the third eccentric portion 123 can be eliminated, with only the first eccentric portion 121 being provided. Those skilled in the art will appreciate that in dynamic balancing, in addition to the centrifugal balance of the eccentric portion of the crankshaft 10 and the piston 18, which needs to be satisfied by the first eccentric portion 121, the gas forces generated by the blades, piston 18, springs, and high and low pressure differentials can be adjusted by appropriately adjusting the second eccentric portion 122 and the third eccentric portion 123 to meet the requirements of tangential vibration reduction. In this case, the mass counterweight of the first eccentric portion 121 can further reduce axial X vibration.

[0047] 3) The end ring structure formed by the first eccentric portion 121 and the upper bearing 16, flange and cylinder body 13 envelop a cavity, which can form a local cavity mode while reducing the overall height by eliminating the muffler, covering the upper bearing flange to a certain extent, producing a physical noise isolation effect, thereby compensating for the noise reduction measures after the muffler is eliminated.

[0048] 4) The notch 19 formed by the second eccentric portion 122 (see Figure 6 ), which can guide the exhaust airflow of the valve plate to the lower end of the motor winding through centrifugal action, and then bend it through the gap between the stator and rotor to exhaust, thereby reducing the temperature of the motor winding and also achieving the oil filtering effect.

[0049] 5) The end ring structure formed by the first eccentric portion 121 is connected to the notch 19 at the connection between the lower end surface of the rotor core 11 and the refrigerant through hole 20 of the rotor core 11, which can quickly extract air from the horizontal oil hole at the upper end of the upper bearing 16 of the crankshaft 10, ensuring the reliability of the right side lifting of the pump oil.

[0050] As an optional embodiment, the protruding section 1212 protrudes outward toward the cylinder body 13. In this embodiment, the protruding section 1212 protrudes along the axial direction X of the crankshaft 10 toward the cylinder body 13. In other embodiments, the protruding section 1212 may also protrude outward in a direction that is angled with the axial direction X of the crankshaft 10, as long as the center of mass of the first eccentric portion 121 can be moved downward between the rotor core 11 and the cylinder body 13.

[0051] To achieve the above-mentioned object, the present invention further provides a compressor comprising the cylinder assembly described above. With such a configuration, the first eccentric portion 121 is provided to shift the center of mass of the first eccentric portion 121 downward, thereby reducing the mass or volume of the existing second eccentric portion 122 and third eccentric portion 123, thereby reducing the overall height of the compressor, thereby enabling the compressor to meet the application requirements of more scenarios.

[0052] In summary, in the cylinder assembly and the compressor provided in the embodiments of the present invention, the cylinder assembly includes: a crankshaft, a rotor core, a balancing block and a cylinder body; the crankshaft is sequentially passed through the cylinder body and the rotor core, the cylinder body is arranged on one side of the rotor core along the axial direction of the crankshaft, and a accommodating cavity is formed between the cylinder body and the rotor core; the balancing block is connected to the rotor core, and the balancing block has at least a first eccentric portion, and the center of mass of the first eccentric portion is located in the accommodating cavity; the first eccentric portion includes an annular extension section and a protruding section, the annular extension section extends outward along the radial direction of the crankshaft, and the protruding portion is arranged at an end of the annular extension section away from the crankshaft, and the extension direction of the protruding portion is set at an angle to the extension direction of the annular extension section.

[0053] With this configuration, by providing a first eccentric portion including an annular extension section and a protruding section on the balancing block, and moving the center of mass of the first eccentric portion downwardly between the rotor core and the cylinder body, the counterweight of the lower balancing block can be increased compared to existing balancing blocks, thereby increasing the moment of inertia and achieving a vibration reduction effect. At the same time, the addition of the first eccentric portion can also reduce the volume and mass of the original upper balancing block (equivalent to the third eccentric portion in this application) and the lower balancing block (equivalent to the second eccentric portion in this application), thereby making the internal layout of the compressor more compact and reducing the height of the compressor.

[0054] Furthermore, when the center of mass of the first eccentric portion is lower than the center of constraint of the upper bearing on the long axis of the crankshaft, a trend toward a dual-rotor balancing effect can be achieved; when the axial distance of the first eccentric portion is closer to the eccentric portion of the crankshaft and the center of the piston, the axial distance from the first eccentric portion to the eccentric portion of the crankshaft is shortened relative to the axial distance from the third eccentric portion to the eccentric portion of the crankshaft, which can further reduce the mass and volume of the second and third eccentric portions; when the center of mass of the first eccentric portion and the combined center of mass of the crankshaft and the piston reach static equilibrium, the second and third eccentric portions can be directly eliminated, thereby further compressing the internal layout of the compressor and making it more compact;

[0055] Furthermore, the first eccentric portion is located between the cylinder body and the rotor core, and through the arrangement of the annular extension section and multiple protruding sections, a semi-enclosed cavity is formed between the cylinder body, which can increase the rotor counterweight, improve axial vibration, and also play a role in physically isolating noise, thereby being able to cancel the muffler while compensating for the noise reduction of the absence of a muffler.

[0056] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A cylinder assembly, characterized in that: include: Crankshaft, rotor core, balance block and cylinder body; The crankshaft is sequentially passed through the cylinder body and the rotor core, the cylinder body is arranged on one side of the rotor core along the axial direction of the crankshaft, and an accommodating cavity is formed between the cylinder body and the rotor core; The balancing block is connected to the rotor core, and the balancing block has at least a first eccentric portion, and the center of mass of the first eccentric portion is located in the accommodating cavity; The first eccentric portion includes an annular extension section and a protruding section. The annular extension section extends outward in the radial direction of the crankshaft. The protruding section is arranged at one end of the annular extension section away from the crankshaft, and the extension direction of the protruding section is arranged at an angle to the extension direction of the annular extension section.

2. The cylinder assembly according to claim 1, wherein: The balancing block also has a second eccentric portion and a third eccentric portion. The second eccentric portion and the first eccentric portion are both arranged on the side of the rotor core close to the cylinder body. The second eccentric portion is connected to the annular extension section and is arranged on the surface of the rotor core close to the cylinder body; the third eccentric portion is arranged on the surface of the rotor core away from the cylinder body.

3. The cylinder assembly according to claim 2, wherein: The second eccentric portion and the third eccentric portion are respectively arranged to protrude relative to the surface of the rotor core, and the second eccentric portion and the third eccentric portion are respectively arranged on both sides of the crankshaft along the radial direction of the crankshaft.

4. The cylinder assembly according to claim 2, wherein: The cylinder assembly also includes a housing and an upper bearing; The upper bearing is arranged on a side of the cylinder body close to the rotor core, and the upper bearing or the cylinder body is welded to the shell.

5. The cylinder assembly according to claim 4, wherein: The first eccentric portion includes at least one protruding segment, and the protruding segment and the second eccentric portion are located on the same side of the crankshaft in the radial direction of the crankshaft.

6. The cylinder assembly according to claim 5, wherein: The first eccentric portion includes two protruding segments, and the two protruding segments are respectively located on both sides of the crankshaft along the radial direction of the crankshaft, and one of the protruding segments and the second eccentric portion are located on the same side of the crankshaft along the radial direction of the crankshaft, and the other protruding segment and the third eccentric portion are located on the same side of the crankshaft along the radial direction of the crankshaft.

7. The cylinder assembly according to claim 1 or 2, characterized in that: The cylinder assembly also includes a housing and a lower bearing; The lower bearing is arranged on a side of the cylinder body away from the rotor core, and the lower bearing is welded to the housing.

8. The cylinder assembly according to claim 7, wherein: The first eccentric portion includes two protruding segments, and the two protruding segments are respectively located on both sides of the crankshaft along the radial direction of the crankshaft.

9. The cylinder assembly according to claim 1, wherein: The protruding section protrudes outward toward a direction close to the cylinder body.

10. A compressor, characterized in that: The invention comprises the cylinder assembly according to any one of claims 1 to 9.

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