Compressor and electrical appliance

Abstract

The application relates to a compressor and an electrical appliance, the compressor comprising: a body structure; a cylinder sleeve movably mounted on the body structure in a first direction; a piston, one end of which is located in the cylinder sleeve, the other end of which is movably mounted on the body structure and can be controlled to do eccentric motion around an eccentric axis; wherein the first direction, the axis direction of the cylinder sleeve and the eccentric axis direction are coplanar and non-intersecting. When one end of the piston does eccentric motion, drives the other end of the piston to do reciprocating motion in the cylinder sleeve, the thrust generated by the piston head of the piston to the cylinder sleeve will make the piston do reciprocating motion in the first direction on the body structure, thereby relieving the uneven stress between the piston and the cylinder sleeve, reducing the generation of noise and vibration, and improving the user experience.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a compressor and electrical equipment. Background Technology

[0002] An oxygen concentrator is a type of machine that produces oxygen. It separates oxygen and nitrogen based on the difference in the adsorption capacity of adsorbents for oxygen and nitrogen in the air. When air is compressed by a compressor and enters an adsorption tower containing adsorbents such as molecular sieves, the different adsorption properties of molecular sieves for oxygen and nitrogen under different pressures are utilized. The adsorption and separation process of oxygen and nitrogen is completed under pressure, and the adsorbed nitrogen is desorbed under depressurization.

[0003] Currently, the compressors in oxygen concentrators typically use piston motion to produce high-pressure gas. When the oxygen concentrator is working, the compressor piston is driven by the motor shaft, causing the piston to reciprocate within the cylinder liner. However, the driving force on the piston from the motor shaft is not in a fixed direction, resulting in uneven force distribution between the piston and the cylinder liner. This ultimately leads to significant noise and vibration during the piston's movement within the cylinder liner, reducing the user experience. Summary of the Invention

[0004] Therefore, it is necessary to provide a compressor and electrical equipment to address the problem of significant noise and vibration generated during the piston's movement within the cylinder liner.

[0005] A compressor, comprising:

[0006] Organism structure;

[0007] The cylinder liner is movably mounted on the machine body structure along a first direction;

[0008] The piston has one end located inside the cylinder liner and the other end movably mounted on the machine body structure, and can perform eccentric motion controllably around an eccentric axis.

[0009] Wherein, the first direction, the axial direction of the cylinder liner, and the eccentric axial direction are all coplanar and do not intersect.

[0010] In one embodiment, the engine block structure includes a cylinder head assembly and a base assembly, with one end of the piston away from the cylinder liner movably mounted on the base assembly, the cylinder head assembly being connected to the base assembly, and both ends of the cylinder liner being movably mounted on the cylinder head assembly and the base assembly along the first direction in the axial direction.

[0011] In one embodiment, the cylinder head assembly has a first guide portion, and the piston has a first limiting portion, which can cooperate with the first guide portion and limit the range of movement of the cylinder liner in the first direction.

[0012] In one embodiment, the cylinder head assembly includes a valve plate mounted on the end of the cylinder liner away from the base assembly, and the valve plate has a first guide portion.

[0013] In one embodiment, the first guide portion is a limiting groove formed on the inner wall of the valve plate, the limiting groove extending longitudinally along a first direction, and the first limiting portion is a limiting block protruding from the circumferential side wall of the cylinder liner, the limiting block extending into the limiting groove.

[0014] In one embodiment, the limiting groove includes two grooves, which are symmetrically arranged on both sides of the valve plate in the direction of the eccentric axis.

[0015] The limiting block includes two blocks, which are symmetrically arranged on both sides of the cylinder liner in the direction of the eccentric axis, and each block extends into one of the limiting grooves.

[0016] In one embodiment, the cylinder head assembly further includes a seal disposed between the valve plate and the cylinder liner. The seal has two first buffer portions, which are spaced apart on both sides of the cylinder liner along a first direction. Each buffer portion is located on the movement path of the cylinder liner in the first direction.

[0017] In one embodiment, the base assembly has a second guide portion, and the piston has a second limiting portion. The second limiting portion can cooperate with the second guide portion and limit the range of movement of the cylinder liner in the first direction.

[0018] In one embodiment, the base assembly includes a base body, one end of the cylinder liner away from the cylinder head assembly is mounted on the base body, the piston is movably mounted on the base body, and the base body is provided with a second guide portion.

[0019] In one embodiment, the second guide portion is a strip-shaped hole formed on the base body, the strip-shaped hole extending longitudinally along a first direction, and the second limiting portion is a limiting post installed on the cylinder liner, the limiting post extending into the strip-shaped hole.

[0020] In one embodiment, a plurality of limiting posts are provided on one end face of the cylinder liner facing the base body, and the plurality of limiting posts are spaced apart around the axis of the cylinder liner;

[0021] The base body has multiple strip holes. When the cylinder liner is installed on the base body, each of the limiting posts passes through one of the strip holes.

[0022] In one embodiment, the base assembly further includes a base pad, which is installed between the cylinder liner and the base body, and the base pad has an clearance hole, through which the limiting post passes.

[0023] In one embodiment, the base pad is further provided with a plurality of second buffer portions, which are spaced apart around the cylinder liner in the circumferential direction, and each of the second buffer portions is located on the movement path of the cylinder liner in the first direction.

[0024] An electrical appliance comprising a compressor as described in any of the preceding claims.

[0025] The compressor described above is movably mounted on the machine body structure via a cylinder liner in the first direction X, giving the cylinder liner a certain range of motion. When one end of the piston makes an eccentric movement, driving the other end of the piston to reciprocate within the cylinder liner, the thrust generated by the piston head on the cylinder liner causes the piston to reciprocate along the first direction on the machine body structure. This alleviates the uneven force distribution between the piston and the cylinder liner, reduces noise and vibration, and improves the user experience. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the compressor piston moving to the bottom dead center in some embodiments of this application.

[0027] Figure 2 for Figure 1 A schematic diagram of the compressor piston moving from bottom dead center to top dead center in the embodiment.

[0028] Figure 3 for Figure 1 A schematic diagram of the compressor piston moving to top dead center in the embodiment.

[0029] Figure 4 for Figure 1 A schematic diagram of the compressor piston moving from top dead center to bottom dead center in the embodiment.

[0030] Figure 5 for Figure 1 A schematic diagram of the compressor cylinder liner in the embodiment.

[0031] Figure 6 for Figure 1 A schematic diagram of the valve plate of the compressor in the embodiment.

[0032] Figure 7 for Figure 1 A schematic diagram of the compressor's sealing gasket in the embodiment.

[0033] Figure 8 for Figure 1A schematic diagram of the compressor base body in the embodiment.

[0034] Figure 9 for Figure 1 A schematic diagram of the compressor's base pad structure in the embodiment.

[0035] Explanation of reference numerals in the attached figures:

[0036] Cylinder liner 10; First limiting part 11; Second limiting part 12; Limiting block 13; Limiting post 14;

[0037] Piston 20; Piston head 21; Connecting rod 22;

[0038] Cylinder head assembly 30; first guide portion 31; valve plate 32; cylinder head body 33; limiting groove 34; seal 35; first buffer portion 36;

[0039] Base assembly 40; second guide part 41; base body 42; strip hole 43; bottom pad 44; second buffer part 45; clearance hole 46;

[0040] First direction X. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are 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" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, 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 application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0047] See Figure 1 , Figure 1This diagram illustrates the structure of a compressor according to one embodiment of this application. The compressor provided in this embodiment includes a body structure, a cylinder liner 10, and a piston 20. The cylinder liner 10 is movably mounted on the body structure along a first direction X. One end of the piston 20 is located inside the cylinder liner 10, and the other end is movably mounted on the body structure, and can be controllably eccentrically moved around an axis. The first direction X, the axial direction of the cylinder liner 10, and the eccentric axis direction are all coplanar and do not intersect. Specifically... Figure 1 In the embodiment, the first direction X is the left-right direction, the axis direction of the cylinder liner 10 is the up-down direction, and the eccentric axis direction is the direction perpendicular to the paper. When the end of the piston 20 located outside the cylinder liner 10 makes an eccentric movement around the eccentric axis, the end of the piston 20 located inside the cylinder liner 10 will move along the axis direction of the cylinder liner 10.

[0048] Specifically, the compressor also includes a motor shaft, and the piston 20 includes a piston head 21 and a connecting rod 22. The piston head 21 is located inside the cylinder liner 10, and the circumferential sidewall of the piston head 21 is in sealed contact with the inner wall of the cylinder liner 10. One end of the connecting rod 22 is hinged to the piston head 21, and the other end is connected to the motor shaft so that the motor shaft drives one end of the connecting rod 22 to make eccentric movements around the eccentric axis. The connecting rod 22 will then drive the piston head 21 to make repeated movements inside the cylinder liner 10, thereby compressing the gas inside the cylinder liner 10.

[0049] Among them, see Figure 1 , Figure 2 and Figure 3 During the movement of piston 20 from bottom dead center to top dead center, when piston head 21 moves to the middle of cylinder liner 10, one end of connecting rod 22 is in an eccentric state. Piston head 21 will tilt along with connecting rod 22, resulting in piston head 21 exerting a thrust on one side of cylinder liner 10. Figure 2 As shown, this results in uneven force distribution between the piston 20 and the cylinder liner 10, leading to significant noise and vibration. Similarly, see [reference needed]. Figure 2 , Figure 3 and Figure 4 As the piston 20 moves from top dead center to bottom dead center, the piston head 21 will exert a thrust on the other side of the cylinder liner 10, such as... Figure 3 As shown, this will also cause uneven force distribution between the piston 20 and the cylinder liner 10, resulting in greater noise and vibration.

[0050] The cylinder liner 10 is movably mounted on the engine block structure in the first direction X, giving it a certain range of motion. When one end of the piston 20 makes an eccentric movement, causing the other end of the piston 20 to reciprocate within the cylinder liner 10, the thrust generated by the piston head 21 of the piston 20 on the cylinder liner 10 will cause the piston 20 to reciprocate along the first direction X on the engine block structure. This alleviates the uneven force distribution between the piston 20 and the cylinder liner 10, reduces noise and vibration, and improves the user experience.

[0051] In some embodiments of this application, the body structure includes a base assembly 40 and a cylinder head assembly 30. The end of the piston 20 away from the base assembly 40 is movably mounted on the base assembly 40, that is, one end of the connecting rod 22 is movably mounted on the base assembly 40 to perform eccentric motion around the eccentric axis. The motor shaft is also mounted on the base assembly 40 to drive the piston 20 to move.

[0052] The cylinder head assembly 30 is connected to the base assembly 40. The cylinder liner 10 is movably mounted on the cylinder head assembly 30 and the base assembly 40 at both ends in the first direction X along the axial direction. The base assembly 40 is used to support the cylinder liner 10. The cylinder head assembly 30 is used to cover the cylinder liner 10 and seal one end of the cylinder liner 10 so that the movement of the piston 20 in the cylinder liner 10 can compress the air in the cylinder liner 10. The compressed air can be discharged from the compressor through the cylinder head assembly 30.

[0053] In some embodiments, a first guide portion 31 is provided on the cylinder head assembly 30, and a first limiting portion 11 is provided on the piston 20. The first limiting portion 11 can cooperate with the first guide portion 31 and limit the movement range of the cylinder liner 10 in the first direction X. This prevents the cylinder liner 10 from moving beyond its range, causing it to collide with other components on the engine block structure and resulting in damage to the cylinder liner 10.

[0054] In some specific embodiments, the cylinder head assembly 30 includes a cylinder head body 33 and a valve plate 32. The valve plate 32 is installed at the end of the cylinder liner 10 away from the base assembly 40. The cylinder head body 33 is installed on the valve plate 32 and connected to the base assembly 40 by bolts or other fasteners, thereby pressing the valve plate 32 onto the cylinder liner 10 so that the valve plate 32 can seal the cylinder liner 10. In addition, the valve plate 32 is also provided with a gas valve. When the compressor reciprocates, the intake and gas valves open and close alternately to realize the cycle of intake, compression and exhaust.

[0055] Among them, see Figure 5 and Figure 6The valve plate 32 is provided with a first guide portion 31. Since the valve plate 32 is in direct contact with the end of the cylinder liner 10, setting the first guide portion 31 on the valve plate 32 can facilitate the first guide portion 31 to cooperate with the first limiting portion 11 of the cylinder liner 10 and play a good limiting role.

[0056] Specifically, the first guide portion 31 is a limiting groove 34 formed on the inner wall of the valve plate 32, extending longitudinally along the first direction X. The first limiting portion 11 is a limiting block 13 protruding from the circumferential side wall of the cylinder liner 10, extending into the limiting groove 34. The movement of the limiting block 13 within the limiting groove 34 limits the range of motion of the cylinder liner 10. It is understood that the cooperation between the first limiting portion 11 and the first guide portion 31 can be, but is not limited to, the aforementioned limiting groove 34 and limiting block 13. Alternatively, the first limiting portion 11 can abut against two first guide portions 31 spaced apart along the first direction X to limit the movement of the first limiting portion 11, thereby limiting the movement of the cylinder liner 10.

[0057] Furthermore, the limiting groove 34 includes two grooves, which are symmetrically arranged on both sides of the valve plate 32 in the eccentric axis direction. The limiting block 13 also includes two grooves, which are symmetrically arranged on both sides of the cylinder liner 10 in the eccentric axis direction, and each extends into one of the limiting grooves 34. Thus, during the movement of the cylinder liner 10, both sides of the cylinder liner 10 can be limited by the corresponding limiting grooves 34, which not only improves the limiting effect of the cylinder liner 10 but also makes its movement smoother.

[0058] In some embodiments, see Figure 7 To improve the sealing between the valve plate 32 and the cylinder liner 10, the cylinder head assembly 30 also includes a seal 35. The seal 35 is sealed between the valve plate 32 and the cylinder liner 10 to seal the gap between them. The seal 35 has two first buffer portions 36, which are spaced apart along a first direction X on both sides of the cylinder liner 10. Each buffer portion is located on the movement path of the cylinder liner 10 in the first direction X.

[0059] Thus, during the movement of the cylinder liner 10, the movement range of the cylinder liner 10 in the first direction X is limited by the aforementioned guide groove and limiting block 13. When the cylinder liner 10 moves to or has already moved to the limit position in the first direction X, the cylinder liner 10 will contact one of the first buffer parts 36 to prevent the cylinder liner 10 from impacting the valve plate 32 and causing damage to the cylinder liner 10 or the valve plate 32. At the same time, the first buffer part 36 can also buffer the movement of the cylinder liner 10, reducing the noise and vibration generated by the movement of the cylinder liner 10.

[0060] In some embodiments of this application, see [reference] Figure 8The base assembly 40 has a second guide portion 41, and the piston 20 has a second limiting portion 12. The second limiting portion 12 can cooperate with the second guide portion 41 to limit the movement range of the cylinder liner 10 in the first direction X. Thus, the first guide portion 31 on the cylinder head assembly 30 limits the movement range of the top end of the cylinder liner 10 in the first direction X, and the second guide portion 41 on the base assembly 40 limits the movement range of the bottom end of the cylinder liner 10 in the first direction X. The combination of the two results in a better limitation effect on the movement range of the cylinder liner 10, and also makes the movement of the cylinder liner 10 smoother.

[0061] In some embodiments, the base assembly 40 includes a base body 42, with one end of the cylinder liner 10 away from the cylinder head assembly 30 mounted on the base body 42. The base body 42 not only serves to mount the cylinder liner 10 but also provides mounting and movement space for the motor shaft and the eccentric movement of the piston 20. The base body 42 is also connected to the cylinder head body 33 via bolts or other fasteners, causing the cylinder head body 33 to press the cylinder liner 10 onto the base body 42. A second guide portion 41 is provided on the base body 42 to limit the movement of the bottom end of the cylinder liner 10 in the first direction X.

[0062] Specifically, the second guide portion 41 is a strip-shaped hole 43 formed on the base body 42, extending longitudinally along the first direction X. The second limiting portion 12 is a limiting post 14 mounted on the cylinder liner 10, extending into the strip-shaped hole 43. The movement of the limiting post 14 within the strip-shaped hole 43 limits the movement of the cylinder liner 10 in the first direction X. Similar to the first guide portion 31, the cooperation between the second limiting portion 12 and the second guide portion 41 can be, but is not limited to, the aforementioned limiting groove 34 and limiting block 13. Alternatively, the second limiting portion 12 can abut against two second guide portions 41 spaced apart along the second direction to restrict the movement of the second limiting portion 12, thereby restricting the movement of the cylinder liner 10.

[0063] Furthermore, a plurality of limiting posts 14 are provided on the side end face of the cylinder liner 10 facing the base body 42, and the plurality of limiting posts 14 are spaced apart around the axis of the cylinder liner 10. The base body 42 has a plurality of slotted holes 43, and when the cylinder liner 10 is installed on the base body 42, each limiting post 14 passes through one of the slotted holes 43. Thus, by the movement of the plurality of limiting posts 14 within the plurality of slotted holes 43, multiple parts at the bottom end of the cylinder liner 10 are limited, which not only improves the limiting effect of the cylinder liner 10 but also makes the movement of the cylinder liner 10 smoother.

[0064] Specifically Figure 1In this embodiment, the base body 42 has a mounting surface for mounting the cylinder liner 10. The mounting surface has a movable hole for the piston 20 to move. The mounting surface has a plurality of strip holes 43, all of which are arranged around the movable hole. The limiting post 14 is also arranged on the end face of the cylinder liner 10, so that after the cylinder liner 10 is mounted on the mounting surface, each limiting post 14 on the end face of the cylinder liner 10 can extend into the strip hole 43, and the end face of the cylinder liner 10 can form good contact with the mounting surface, ensuring the support effect of the base body 42 on the cylinder liner 10.

[0065] Specifically, in some embodiments, see [link to relevant documentation]. Figure 9 The base assembly 40 also includes a base pad 44, which is installed between the cylinder liner 10 and the base body 42 to prevent the cylinder liner 10 from directly contacting the base body 42. The base pad 44 is also provided with clearance holes 46, which are the same number as the strip holes 43 and correspond one-to-one. Each limiting post 14 passes through the clearance hole 46 and enters the corresponding strip hole 43.

[0066] The base pad 44 is further provided with multiple second buffer portions 45, which are spaced apart circumferentially around the cylinder liner 10, and each second buffer portion 45 is located on the movement path of the cylinder liner 10 in the first direction X. Thus, when the cylinder liner 10 moves to or nears its limit position in the first direction X, it will contact at least one of the second buffer portions 45, preventing the cylinder liner 10 from impacting the base body 42 and causing damage. Simultaneously, the second buffer portions 45 also buffer the movement of the cylinder liner 10, reducing noise and vibration generated by its movement.

[0067] Specifically Figure 1 In one embodiment, the second buffer part 45 includes four parts, which are arranged circumferentially around the cylinder liner 10. When the cylinder liner 10 moves to a near limit position in the first direction X, the cylinder liner 10 will contact two second buffer parts 45 located on the same side to buffer and limit the movement of the cylinder liner 10 through the two second buffer parts 45.

[0068] This application also provides a household appliance, which includes a compressor as described in any of the above embodiments. The compressor is movably mounted on the machine body structure via a cylinder liner 10 in a first direction X, so that the cylinder liner 10 has a certain range of motion. When one end of the piston 20 makes an eccentric movement, driving the other end of the piston 20 to reciprocate within the cylinder liner 10, the thrust generated by the piston head 21 of the piston 20 on the cylinder liner 10 will cause the piston 20 to reciprocate along the first direction X on the machine body structure, thereby alleviating the uneven force between the piston 20 and the cylinder liner 10, reducing the noise and vibration generated during the operation of the household appliance, and improving the user experience.

[0069] Optionally, the aforementioned household appliance is an oxygen concentrator. The oxygen concentrator uses a compressor to reduce noise and vibration during oxygen production, thus improving the user experience and extending the lifespan of the device. It should be noted that the aforementioned electrical equipment can also include refrigerators, air conditioners, and other household or commercial appliances with compressors; no limitation is made here.

[0070] 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.

[0071] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A compressor, characterized in that, The compressor includes: Organism structure; Cylinder liner (10) is movably mounted on the engine block structure along a first direction (X); The piston (20) has one end located inside the cylinder liner (10) and the other end movably mounted on the machine body structure, and can perform eccentric motion around an eccentric axis in a controlled manner; Wherein, the first direction (X) is perpendicular to the axial direction of the cylinder liner (10); The engine body structure includes a cylinder head assembly (30) and a base assembly (40). The piston (20) is movably mounted on the base assembly (40) at one end away from the cylinder liner (10). The cylinder head assembly (30) is connected to the base assembly (40). The cylinder liner (10) is movably mounted on the cylinder head assembly (30) and the base assembly (40) at both ends in the axial direction along the first direction (X). The cylinder head assembly (30) has a first guide portion (31), and the piston (20) has a first limiting portion (11). The first limiting portion (11) can cooperate with the first guide portion (31) and limit the range of movement of the cylinder liner (10) in the first direction (X). The base assembly (40) is provided with a second guide portion (41), and the piston (20) is provided with a second limiting portion (12). The second limiting portion (12) can cooperate with the second guide portion (41) and limit the movement range of the cylinder liner (10) in the first direction (X). The cylinder head assembly (30) includes a valve plate (32), which is mounted on the end of the cylinder liner (10) away from the base assembly (40), and a first guide portion (31) is provided on the valve plate (32). The first guide part (31) is a limiting groove (34) opened on the inner wall of the valve plate (32). The limiting groove (34) extends longitudinally along the first direction (X). The first limiting part (11) is a limiting block (13) protruding from the circumferential side wall of the cylinder liner (10). The limiting block (13) extends into the limiting groove (34).

2. The compressor according to claim 1, characterized in that, The limiting groove (34) includes two, and the two limiting grooves (34) are symmetrically arranged on both sides of the valve plate (32) in the direction of the eccentric axis; The limiting block (13) includes two blocks, which are symmetrically arranged on both sides of the cylinder liner (10) in the direction of the eccentric axis and extend into one of the limiting grooves (34).

3. The compressor according to claim 1, characterized in that, The cylinder head assembly (30) also includes a seal (35), which is sealed between the valve plate (32) and the cylinder liner (10). The seal (35) has two first buffer portions (36) which are arranged at intervals along the first direction (X) on both sides of the cylinder liner (10). Each buffer portion is located on the movement path of the cylinder liner (10) in the first direction (X).

4. The compressor according to claim 1, characterized in that, The base assembly (40) includes a base body (42), one end of the cylinder liner (10) away from the cylinder head assembly (30) is mounted on the base body (42), the piston (20) is movably mounted on the base body (42), and the base body (42) is provided with a second guide portion (41).

5. The compressor according to claim 4, characterized in that, The second guide part (41) is a strip hole (43) opened on the base body (42), the strip hole (43) extends longitudinally along the first direction (X), and the second limiting part (12) is a limiting post (14) installed on the cylinder liner (10), the limiting post (14) extends into the strip hole (43).

6. The compressor according to claim 5, characterized in that, The cylinder liner (10) is provided with a plurality of limiting posts (14) on one end face facing the base body (42), and the plurality of limiting posts (14) are spaced apart around the axis of the cylinder liner (10). The base body (42) has multiple strip holes (43). When the cylinder liner (10) is installed on the base body (42), each of the limiting posts (14) passes through one of the strip holes (43).

7. The compressor according to claim 5, characterized in that, The base assembly (40) also includes a base pad (44), which is installed between the cylinder liner (10) and the base body (42), and the base pad (44) has a clearance hole (46), through which the limiting post (14) passes.

8. The compressor according to claim 7, characterized in that, The base pad (44) is also provided with a plurality of second buffer parts (45), which are arranged circumferentially around the cylinder liner (10), and each second buffer part (45) is located on the movement path of the cylinder liner (10) in the first direction (X).

9. An electrical appliance, characterized in that, Includes the compressor as described in any one of claims 1-8.

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