Compressor

Abstract

The utility model provides a compressor, which comprises a compression structure used for compressing gas, and further comprises a shell provided with a containing cavity used for containing the compression structure; at least part of the liquid separation structure is arranged in the containing cavity, the liquid separation structure is provided with a gas inlet part, a liquid separation cavity and a gas outlet part, the gas inlet part and the gas outlet part are both communicated with the liquid separation cavity, the gas inlet part is used for being communicated with external equipment so as to convey gas of the external equipment into the liquid separation cavity, and the gas outlet part is communicated with a gas inlet of the compression structure; and the gas subjected to liquid separation by the liquid separation cavity is fed into the compression structure. The compressor effectively solves the problems that a compressor in the prior art is large in size and noise.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and more specifically, to a compressor. Background Technology

[0002] Currently, rotary compressors are widely used in air conditioning or refrigeration systems due to their advantages of high efficiency, reliability, simple structure and small size. However, during the use of air conditioning or refrigeration systems, refrigerant may enter the compressor, which can lead to compressor damage and increase production costs.

[0003] In existing technology, to prevent refrigerant from entering the compressor, manufacturers install a distributor between the compressor and the air conditioner evaporator. This distributor separates the liquid entrained in the compressor's return gas, thus preventing liquid from entering the compressor. Specifically, the distributor is mounted on a bracket and pressure plate, which are then fixed to the compressor housing with screws, or the bracket and pressure plate are welded to the compressor housing to secure the distributor.

[0004] However, fixing the distributor to the compressor housing makes the compressor bulky, taking up a lot of space, and also shifts the compressor's center of gravity, creating an unbalanced force. This causes the compressor to vibrate significantly during operation, increasing the compressor's vibration and noise. Utility Model Content

[0005] The main objective of this invention is to provide a compressor that solves the problems of large size and high noise in existing compressors.

[0006] To achieve the above objectives, this utility model provides a compressor, including a compression structure for compressing gas. The compressor further includes: a housing having a receiving cavity for accommodating the compression structure; and a liquid distribution structure, at least a portion of which is disposed within the receiving cavity. The liquid distribution structure has an inlet, a liquid distribution chamber, and an outlet. Both the inlet and outlet are connected to the liquid distribution chamber. The inlet is used to communicate with an external device to deliver gas from the external device into the liquid distribution chamber. The outlet is connected to the inlet of the compression structure to deliver gas that has been separated by the liquid distribution chamber into the compression structure.

[0007] Furthermore, the receiving cavity includes a storage cavity for containing the lubricating medium, and at least a partial compression structure and at least a partial dispensing structure are located within the storage cavity.

[0008] Furthermore, the liquid separation structure includes a main body, which is tubular, and the liquid separation chamber is the cavity of the main body.

[0009] Furthermore, at least a portion of the main body extends along a predetermined trajectory; wherein the predetermined trajectory is either straight or curved.

[0010] Furthermore, at least a portion of the main body extends along a predetermined trajectory, which is arc-shaped; and / or, the main body extends circumferentially along the inner wall of the shell.

[0011] Furthermore, at least a portion of the outer surface of the main body is in contact with the inner wall of the housing, or at least a portion of the outer surface of the main body is at a predetermined distance from the inner wall of the housing.

[0012] Furthermore, the liquid separation structure also includes: a suction pipe, one end of which is connected to an external device and the other end of which is connected to an air inlet, so as to deliver the gas from the external device to the air inlet; and a fixing pipe, which is installed on the housing, one end of which is sleeved on the air inlet and the other end of which is sleeved on the suction pipe.

[0013] Furthermore, the liquid separation structure also includes a filter section, which is fitted onto the air inlet section to filter the gas entering the air inlet section through the suction pipe.

[0014] Furthermore, the air intake has a connecting port, and the filter includes a fixing member and a filter element. The fixing member is sleeved on the air intake, and the filter element is disposed on the fixing member and covers the connecting port. The filter element is arc-shaped and protrudes in a direction away from the connecting port.

[0015] Furthermore, at least a portion of the main body is an arc-shaped structure, with the central axis of the arc-shaped structure coaxial with the central axis of the shell, and the diameter D1 of the central axis of the arc-shaped structure and the diameter D2 of the inner wall of the shell satisfying the following condition: 0.85D2≤D1≤0.95D2.

[0016] Furthermore, the diameter D3 of the arc structure satisfies the following condition with respect to the diameter D2: 0.1D2≤D3≤0.15D2.

[0017] Furthermore, the thickness T of the tube wall of the main body satisfies: 1.2mm≤T≤1.5mm.

[0018] Furthermore, the compression structure includes a cylinder and a piston. The cylinder is installed in the receiving cavity and has an air inlet, a central cavity, and an exhaust port. Both the air inlet and the exhaust port are connected to the central cavity. The air inlet is connected to the air outlet. The piston is rotatably disposed in the central cavity to compress the gas in the central cavity. The air outlet is interference-fitted with the air inlet.

[0019] The present invention provides a compressor comprising a compression structure for compressing gas, and further comprising: a housing having a receiving cavity for accommodating the compression structure; and a liquid distribution structure, at least partially disposed within the receiving cavity, comprising an inlet section, a liquid distribution chamber, and an outlet section. Both the inlet and outlet sections are connected to the liquid distribution chamber. The inlet section is used to communicate with external equipment to deliver gas from the external equipment into the liquid distribution chamber. The outlet section is connected to the inlet of the compression structure to deliver gas separated by the liquid distribution chamber into the compression structure. This method of embedding the liquid distribution structure within the storage cavity effectively utilizes the space of the storage cavity. Compared to traditional external liquid distribution structures, it reduces the space occupied by the compressor, decreases the overall volume of the compressor, achieves a miniaturized design, avoids center of gravity shift, results in a more uniform overall mass distribution, reduces compressor imbalance, lowers noise during operation, and ensures dynamic balance and operational stability, thereby solving the problems of large compressor size and high noise levels in existing technologies. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A perspective view of the overall structure of an embodiment of the compressor according to the present invention is shown;

[0022] Figure 2 It shows Figure 1 Top view of the compressor in the middle;

[0023] Figure 3 It shows Figure 2 A cross-sectional view of the compressor at point AA;

[0024] Figure 4 It shows Figure 3 A magnified view of a portion of the image;

[0025] Figure 5 It shows Figure 3 Sectional view at BB.

[0026] The above figures include the following reference numerals:

[0027] 1. Lubricating medium;

[0028] 10. Shell; 11. Receiving cavity; 12. Storage cavity;

[0029] 20. Compression structure; 21. Cylinder; 211. Air inlet; 212. Central cavity; 22. Piston;

[0030] 30. Liquid separation structure; 31. Air inlet; 311. Connecting port; 32. Air outlet; 33. Main body; 331. Liquid separation chamber; 34. Suction pipe; 35. Fixing pipe; 36. Filter section; 361. Fixing component; 362. Filter component. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0033] In this utility model, unless otherwise stated, directional terms such as "upper" and "lower" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" are generally used in relation to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0034] To address the issues of large size and high noise levels in existing compressors, this application provides a compressor.

[0035] like Figures 1 to 5 As shown, the compressor includes a compression structure 20 for compressing gas, a housing 10, and a liquid distribution structure 30. The housing 10 has a receiving cavity 11 for accommodating the compression structure 20. At least a portion of the liquid distribution structure 30 is disposed within the receiving cavity 11. The liquid distribution structure 30 has an inlet 31, a liquid distribution chamber 331, and an outlet 32. Both the inlet 31 and the outlet 32 ​​communicate with the liquid distribution chamber 331. The inlet 31 is used to communicate with external equipment to deliver gas from the external equipment into the liquid distribution chamber 331. The outlet 32 ​​communicates with the inlet 211 of the compression structure 20 to deliver the gas that has been liquidated through the liquid distribution chamber 331 into the compression structure 20.

[0036] Using the technical solution of this embodiment, the compressor includes a compression structure 20 for compressing gas, and the compressor also includes: a housing 10 having a receiving cavity 11 for receiving the compression structure 20; and a liquid distribution structure 30, at least partially disposed in the receiving cavity 11. The liquid distribution structure 30 has an air inlet 31, a liquid distribution chamber 331, and an air outlet 32. Both the air inlet 31 and the air outlet 32 ​​are connected to the liquid distribution chamber 331. The air inlet 31 is used to communicate with an external device to deliver gas from the external device to the liquid distribution chamber 331. The air outlet 32 ​​is connected to the air inlet 211 of the compression structure 20 to send the gas that has been liquidated by the liquid distribution chamber 331 into the compression structure 20. In this way, the liquid distribution structure 30 is built into the storage cavity 12, which effectively utilizes the space of the storage cavity 12. Compared with the traditional external liquid distribution structure 30, it reduces the space occupied by the compressor, reduces the overall volume of the compressor, realizes the overall miniaturization design of the compressor, and avoids the phenomenon of the compressor's center of gravity shift. This makes the overall mass distribution of the compressor more uniform, reduces the unbalance of the compressor, reduces the noise during the operation of the compressor, and ensures the dynamic balance and operational stability of the compressor. Thus, it solves the problem of large compressor size and noise in the prior art.

[0037] In this embodiment, the liquid separation structure 30 is a gas-liquid separator.

[0038] In this embodiment, the external device is an evaporator.

[0039] In this embodiment, the gas is a refrigerant.

[0040] like Figure 3 As shown, the receiving cavity 11 includes a storage cavity 12 for containing the lubricating medium 1, and at least a portion of the compression structure 20 and at least a portion of the liquid distribution structure 30 are located within the storage cavity 12. This arrangement, where the liquid distribution structure 30 is immersed in the lubricating medium 1, serves two purposes: firstly, it utilizes the refrigerant in the liquid distribution structure 30 to lower the temperature of the lubricating medium 1, ensuring its heat dissipation effect and thus guaranteeing the compressor's heat dissipation reliability and improving its operational reliability; secondly, it utilizes the temperature of the lubricating medium 1 to accelerate the evaporation of the liquid refrigerant in the liquid distribution structure 30, ensuring its liquid distribution performance and further preventing liquid slugging in the compressor, further improving its operational reliability. Simultaneously, the arrangement where the compression structure 20 is immersed in the lubricating medium 1 enables the lubricating medium 1 to lubricate and cool the components of the compression structure 20, improving its operational stability and reliability.

[0041] In this embodiment, the lubricating medium 1 is lubricating oil.

[0042] Specifically, the refrigerant in the liquid separation structure 30 can reduce the temperature of the lubricating oil, prevent overheating of the friction surfaces between compressor components, ensure the formation of a normal oil film thickness, and guarantee the lubrication and cooling of the compressor components.

[0043] In this embodiment, the storage cavity 12 is located below the receiving cavity 11. This arrangement makes the compressor structure more compact, improves the space utilization of the compressor, and further ensures the miniaturization of the compressor design.

[0044] like Figure 3 and Figure 5 As shown, the liquid distribution structure 30 includes a main body 33, which is tubular, and the liquid distribution chamber 331 is the cavity of the main body 33. This tubular arrangement of the main body 33 facilitates refrigerant transport, ensuring smooth refrigerant delivery. Furthermore, it increases the contact area between the main body 33 and the lubricating medium 1, improving not only the cooling effect of the refrigerant on the lubricating medium 1 within the liquid distribution chamber 331 but also the evaporation efficiency of the liquid refrigerant, further enhancing the operational reliability of the compressor.

[0045] Specifically, at least a portion of the main body 33 extends along a preset trajectory. This preset trajectory can be straight or curved. This arrangement allows for more flexible and diverse processing methods for the main body 33, improving both the processing and installation flexibility of the workers.

[0046] Optionally, at least a portion of the main body 33 extends along a preset trajectory, which is arc-shaped; and / or, the main body 33 extends circumferentially along the inner wall of the housing 10. In this way, the above arrangement achieves both processing flexibility for the main body 33 and a shape match between the main body 33 and the housing 10, improving the compressor's balance and operational stability.

[0047] Optionally, at least a portion of the outer surface of the main body 33 is in contact with the inner wall of the housing 10, or a predetermined distance is maintained between at least a portion of the outer surface of the main body 33 and the inner wall of the housing 10. This allows workers to weld a portion of the outer surface of the main body 33 to the inner wall of the housing 10, ensuring installation stability of the main body 33 and reliable refrigerant delivery. It also allows the main body 33 to be immersed in the lubricating medium 1, which supports the main body 33, reducing the processing steps for workers and improving their work efficiency and ease of installation.

[0048] like Figures 1 to 4As shown, the liquid-dispensing structure 30 also includes an intake pipe 34 and a fixed pipe 35. One end of the intake pipe 34 is connected to an external device, and the other end is connected to the air inlet 31 to deliver gas from the external device to the air inlet 31. The fixed pipe 35 is mounted on the housing 10, with one end sleeved on the air inlet 31 and the other end sleeved on the intake pipe 34. In this way, the liquid-dispensing structure 30 achieves communication between the air inlet 31 and the external device through the intake pipe 34. Simultaneously, the arrangement of the intake pipe 34 allows for the pre-separation of liquid refrigerant in the refrigerant during its entry into the air inlet 31, reducing the burden on the liquid-dispensing chamber 331 and improving the liquid-dispensing efficiency of the liquid-dispensing structure 30. Meanwhile, the fixed pipe 35 serves two purposes: firstly, it connects the suction pipe 34 to the inlet section 31, ensuring reliable refrigerant delivery; secondly, it secures the suction pipe 34 and the inlet section 31, preventing them from shaking due to external forces and improving the stability and reliability of refrigerant delivery. Furthermore, the fixed pipe 35 not only seals the connection between the suction pipe 34 and the inlet section 31 but also seals the inlet section 31 against the housing 10, preventing refrigerant leakage and ensuring the sealing reliability of the liquid distribution structure 30.

[0049] In this embodiment, the suction pipe 34 is welded to the fixed pipe 35.

[0050] like Figure 3 and Figure 4 As shown, the liquid distribution structure 30 also includes a filter section 36, which is fitted onto the air inlet section 31 to filter the gas entering the air inlet section 31 via the suction pipe 34. This arrangement of the filter section 36 filters the refrigerant, ensuring that the refrigerant entering the liquid distribution chamber 331 is cleaner, thus guaranteeing the internal cleanliness of the compressor and extending its service life. Simultaneously, the arrangement of the filter section 36 also allows liquid refrigerant to adhere to the filter section 36, further reducing the load on the liquid distribution chamber 331 and improving the liquid distribution efficiency of the liquid distribution structure 30.

[0051] like Figure 4As shown, the air intake 31 has a connecting port 311, and the filter 36 includes a fixing member 361 and a filter element 362. The fixing member 361 is sleeved on the air intake 31, and the filter element 362 is disposed on the fixing member 361 and covers the connecting port 311. The filter element 362 is arc-shaped and protrudes in a direction away from the connecting port 311. In this way, the filter 36 is connected to the air intake 31 through the fixing member 361, and the filter 36 filters the refrigerant through the filter element 362, ensuring the filtration reliability of the filter 36. At the same time, the arc-shaped design of the filter element 362 and its protrusion in a direction away from the connecting port 311 allows the filter element 362 to filter impurities while preventing the accumulation of impurities, reducing the frequency of cleaning and replacement of the filter element 362, extending the service life of the filter element 362, and thus extending the service life of the filter 36.

[0052] In this embodiment, the filter element 362 is a filter screen.

[0053] like Figure 5 As shown, at least a portion of the main body 33 is an arc-shaped structure. The central axis of the arc-shaped structure is coaxial with the central axis of the housing 10. The diameter D1 of the central axis of the arc-shaped structure and the diameter D2 of the inner wall of the housing 10 satisfy the following relationship: 0.85D2≤D1≤0.95D2. Thus, a portion of the main body 33 is tubular and arc-shaped, surrounding the storage cavity 12. This extends the movement path of the refrigerant in the liquid distribution cavity 331, increases the gas-liquid separation area, improves the gas-liquid separation effect, and ensures smooth refrigerant delivery. Simultaneously, the ratio of D1 to D2 improves the internal utilization rate of the housing 10, ensuring the compatibility between the main body 33 and the interior of the housing 10, thereby improving the operational stability of the compressor. Furthermore, it provides sufficient space in the liquid distribution cavity 331 to store liquid refrigerant, improving the storage reliability of the liquid distribution cavity 331.

[0054] Specifically, the diameters D3 and D2 of the arc-shaped structure satisfy the following condition: 0.1D2≤D3≤0.15D2. This arrangement optimizes the pipe diameter of the main body 33, reduces its suction resistance, improves the reliability and stability of refrigerant delivery, and also reduces the compressor's power consumption.

[0055] Specifically, the wall thickness T of the main body 33 satisfies: 1.2mm ≤ T ≤ 1.5mm. This design ensures the structural strength and rigidity of the main body 33, achieving its durability. It also guarantees the reliability of heat exchange between the main body 33 and the lubricating medium 1, ensuring the reliable heat dissipation of the lubricating medium 1, and the reliable evaporation of the liquid refrigerant in the liquid distribution chamber 331. Furthermore, this design facilitates the assembly and welding of the main body 33, ensuring its reliable installation.

[0056] like Figure 3 As shown, the compression structure 20 includes a cylinder 21 and a piston 22. The cylinder 21 is installed in the receiving cavity 11 and has an inlet 211, a central cavity 212, and an outlet. Both the inlet 211 and the outlet are connected to the central cavity 212. The inlet 211 is connected to the outlet 32. The piston 22 is rotatably disposed in the central cavity 212 to compress the gas in the central cavity 212. The outlet 32 ​​is interference-fitted with the inlet 211. In this way, the compression structure 20 achieves connection with the outlet 32 ​​of the liquid distribution structure 30 through the inlet 211 of the cylinder 21, ensuring that the refrigerant is delivered to the central cavity 212. At the same time, the interference fit between the outlet 32 ​​and the inlet 211 ensures the stability of the connection between the liquid distribution structure 30 and the cylinder 21, avoids gas leakage, and further improves the gas sealing performance. Meanwhile, the compression structure 20 compresses the refrigerant in the central cavity 212 through the piston 22, thus ensuring the compression reliability of the compression structure 20.

[0057] Specifically, during the operation of the refrigeration system, the low-temperature, low-pressure refrigerant evaporated by the evaporator enters the filter section 36 through the suction pipe 34. After being filtered by the filter section 36, it enters the liquid distribution chamber 331 through the intake section 31. In the liquid distribution chamber 331, the liquid refrigerant in the low-temperature, low-pressure refrigerant is deposited in the liquid distribution chamber 331 due to density differences and gravity. At the same time, the lubricating medium 1 can assist in heating the liquid refrigerant, improving the separation efficiency of the low-temperature, low-pressure refrigerant, and the low-temperature, low-pressure refrigerant can also reduce the temperature of the lubricating medium 1. Afterward, the gaseous refrigerant enters the intake port 211 of the cylinder 21 through the exhaust section 32 and enters the central cavity 212. The piston 22 rotates in the central cavity 212 to compress the low-temperature, low-pressure gaseous refrigerant in the central cavity 212 into a high-temperature, high-pressure gaseous refrigerant, which is then discharged through the exhaust port, thus completing one compression cycle of the compressor.

[0058] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0059] The compressor includes a compression structure for compressing gas, and further includes: a housing having a receiving cavity for housing the compression structure; and a liquid distribution structure, at least partially disposed within the receiving cavity, having an inlet, a liquid distribution chamber, and an outlet. Both the inlet and outlet are connected to the liquid distribution chamber. The inlet is used to communicate with external equipment to deliver gas from the external equipment into the liquid distribution chamber, and the outlet is connected to the inlet of the compression structure to deliver gas separated by the liquid distribution chamber into the compression structure. This method of integrating the liquid distribution structure into the storage cavity effectively utilizes the space of the storage cavity. Compared to traditional external liquid distribution structures, it reduces the space occupied by the compressor, decreases the overall volume of the compressor, achieves a miniaturized design, avoids center of gravity shift, results in a more uniform overall mass distribution, reduces compressor imbalance, lowers noise during operation, and ensures dynamic balance and operational stability, thereby solving the problems of large compressor size and high noise levels in existing technologies.

[0060] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0061] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0062] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A compressor comprising a compression structure (20) for compressing gas, characterized in that, The compressor also includes: The housing (10) has a receiving cavity (11) for receiving the compression structure (20); The liquid separation structure (30) is at least partially disposed within the receiving cavity (11). The liquid separation structure (30) has an air inlet (31), a liquid separation chamber (331), and an air outlet (32). The air inlet (31) and the air outlet (32) are both connected to the liquid separation chamber (331). The air inlet (31) is used to connect with an external device to deliver gas from the external device into the liquid separation chamber (331). The air outlet (32) is connected to the air inlet (211) of the compression structure (20) to deliver the gas separated by the liquid separation chamber (331) into the compression structure (20).

2. The compressor according to claim 1, characterized in that, The receiving cavity (11) includes a storage cavity (12) for receiving the lubricating medium (1), and at least a portion of the compression structure (20) and at least a portion of the liquid distribution structure (30) are located within the storage cavity (12).

3. The compressor according to claim 1, characterized in that, The liquid separation structure (30) includes a main body (33), which is tubular, and the liquid separation chamber (331) is the cavity of the main body (33).

4. The compressor according to claim 3, characterized in that, At least a portion of the main body (33) extends along a preset trajectory; wherein the preset trajectory is either straight or curved.

5. The compressor according to claim 3, characterized in that, At least a portion of the main body (33) extends along a preset trajectory, the preset trajectory being arc-shaped; and / or, the main body (33) extends circumferentially along the inner wall of the housing (10).

6. The compressor according to claim 3, characterized in that, At least a portion of the outer surface of the main body (33) is in contact with the inner wall of the housing (10), or there is a predetermined distance between at least a portion of the outer surface of the main body (33) and the inner wall of the housing (10).

7. The compressor according to claim 1, characterized in that, The liquid separation structure (30) also includes: The suction pipe (34) has one end connected to the external device and the other end connected to the air inlet (31) to deliver the gas from the external device to the air inlet (31). A fixing tube (35) is provided on the housing (10). One end of the fixing tube (35) is sleeved on the air inlet (31), and the other end of the fixing tube (35) is sleeved on the air intake tube (34).

8. The compressor according to claim 7, characterized in that, The liquid separation structure (30) further includes a filter section (36), which is sleeved on the air inlet section (31) for filtering the gas entering the air inlet section (31) through the suction pipe (34).

9. The compressor according to claim 8, characterized in that, The air intake (31) has a connecting port (311), and the filter (36) includes a fixing member (361) and a filter (362). The fixing member (361) is sleeved on the air intake (31), and the filter (362) is disposed on the fixing member (361) and covers the connecting port (311). The filter (362) is arc-shaped and protrudes in a direction away from the connecting port (311).

10. The compressor according to claim 3, characterized in that, At least a portion of the main body (33) is an arc-shaped structure, the central axis of the arc-shaped structure is coaxial with the central axis of the shell (10), and the diameter D1 of the central axis of the arc-shaped structure and the diameter D2 of the inner wall of the shell (10) satisfy the following: 0.85D2≤D1≤0.95D2.

11. The compressor according to claim 10, characterized in that, The diameter D3 of the arc structure and the diameter D2 satisfy the following condition: 0.1D2≤D3≤0.15D2.

12. The compressor according to claim 3, characterized in that, The thickness T of the tube wall of the main body (33) satisfies: 1.2mm≤T≤1.5mm.

13. The compressor according to claim 1, characterized in that, The compression structure (20) includes a cylinder (21) and a piston (22). The cylinder (21) is installed in the receiving cavity (11). The cylinder (21) has an air inlet (211), a central cavity (212), and an exhaust port. The air inlet (211) and the exhaust port are both connected to the central cavity (212). The air inlet (211) is connected to the air outlet (32). The piston (22) is rotatably disposed in the central cavity (212) for compressing the gas in the central cavity (212). The air outlet (32) is interference-fitted with the air inlet (211).

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