Compressor pump and compressor

Abstract

The present invention provides a compressor pump body and a compressor. The compressor pump body includes a crankshaft, a first flange and a cylinder, the first flange and the cylinder are both sleeved on the crankshaft, and the first flange is located above the cylinder; an exhaust port is provided on the first flange; the compressor pump body also includes: a muffler structure, including an outer shell and an outlet of the muffler structure, the outer shell cover is provided on the first flange and forms a first throttling channel with the first flange, and the exhaust port is connected to the first throttling channel; a second throttling channel is formed between the first flange and the cylinder, the second throttling channel has an expansion chamber, and the second throttling channel is connected to the first throttling channel, so that the refrigerant discharged from the exhaust port passes through the first throttling channel and the second throttling channel in sequence and then is discharged from the outlet of the muffler structure. The compressor pump body of the present invention solves the problem of low transmission loss of the muffler in the prior art in a wider frequency range.

Description

Technical Field

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

[0002] The rolling rotor compressor realizes refrigerant compression through the pump body structure, compressing the refrigerant from a low temperature and low pressure state to a high temperature and high pressure state, and discharges it through the exhaust port of the pump body structure. During the exhaust process, due to the high refrigerant pressure, a strong airflow impact force and pressure pulsation are generated, causing a wide-band pneumatic noise; the airflow impact force and pressure pulsation during the exhaust process act on the mechanical structure of the compressor at the same time to generate mechanical noise; and the exhaust pressure pulsation will be transmitted to the air conditioner indoor unit with the flow of refrigerant, causing air conditioning transmission sound. Therefore, the quality of exhaust pressure pulsation control is directly related to the sound quality of the compressor and air conditioner.

[0003] At present, rolling rotor compressors mainly control exhaust pressure pulsation by designing a resistant silencer at the exhaust port. However, the existing silencer design has many shortcomings: First, the existing silencer design is affected by the installation height of the compressor motor and the limit screws of the pump body, resulting in a low transmission loss of the existing silencer in certain frequency bands; Second, the existing silencers are mainly in two forms: upper exhaust and side exhaust. The exhaust airflow impact force and pressure pulsation of the upper exhaust silencer directly act on the motor rotor, causing the compressor rotor to run unstable and generate electromagnetic noise. The exhaust airflow impact force of the side exhaust silencer acts on the shell, causing the refrigerant oil return in the compressor to be blocked, resulting in a decrease in the oil volume in the compressor, an increase in power and a decrease in energy efficiency. The oil volume in the system refrigerant cycle increases, the heat exchange efficiency decreases, and the system energy efficiency decreases. Summary of the invention

[0004] The main purpose of the present invention is to provide a compressor pump body and a compressor to solve the problem of low transmission loss of the muffler in the prior art within a wider frequency range.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a compressor pump body is provided, including a crankshaft, a first flange and a cylinder, the first flange and the cylinder are both mounted on the crankshaft, and the first flange is located above the cylinder; an exhaust port is arranged on the first flange; the compressor pump body also includes: a silencer structure, including an outer shell and an outlet of the silencer structure, the outer shell cover is arranged on the first flange and forms a first throttling channel with the first flange, and the exhaust port is connected with the first throttling channel; a second throttling channel is formed between the first flange and the cylinder, the second throttling channel has an expansion chamber, and the second throttling channel is connected with the first throttling channel, so that the refrigerant discharged from the exhaust port passes through the first throttling channel and the second throttling channel in sequence and is discharged from the outlet of the silencer structure.

[0006] Furthermore, the second throttling channel includes a first connecting channel, one end of the first connecting channel is connected to the first throttling channel, and the other end of the first connecting channel is connected to the expansion chamber; the flow cross-sectional area of ​​the first connecting channel is smaller than the flow cross-sectional area of ​​the expansion chamber.

[0007] Furthermore, the second throttling channel includes at least two expansion chambers, at least two expansion chambers are arranged at intervals, and two adjacent expansion chambers are connected through a second connecting channel; the flow cross-sectional area of ​​the second connecting channel is smaller than the flow cross-sectional area of ​​the expansion chamber.

[0008] Furthermore, the first flange has a first end face and a second end face arranged opposite to each other, and the first end face is located above the second end face; a first recessed portion, a second recessed portion and a third recessed portion are arranged on the cylinder, the first recessed portion and the second end face form an expansion chamber, the second recessed portion and the second end face form a first connecting channel, and the third recessed portion and the second end face form a second connecting channel.

[0009] Furthermore, the first flange has a first end face and a second end face which are arranged opposite to each other, and the first end face is located above the second end face; the outer shell cover is arranged on the first end face; the exhaust port is located on the first end face, and the outer shell cover is arranged on the exhaust port.

[0010] Furthermore, the silencer structure has a first throttling channel outlet connected to the first throttling channel and a second throttling channel inlet connected to the first connecting channel, the first throttling channel outlet is arranged on the first end surface, the second throttling channel inlet is arranged on the second end surface, and the first throttling channel outlet and the second throttling channel inlet are connected.

[0011] Furthermore, the outlet of the sound-absorbing structure is arranged on the side wall of the first flange, and the outlet of the sound-absorbing structure is arranged opposite to the skirt of the first flange.

[0012] Furthermore, the first flange has a first end face and a second end face that are arranged opposite to each other, and the first end face is located above the second end face; a fourth recessed portion is arranged on the first flange, and the fourth recessed portion forms a connecting port and an outlet of the silencer structure, and the connecting port and the outlet of the silencer structure are connected, and the connecting port is located on the second end face, and the connecting port is connected to the second throttling channel.

[0013] Furthermore, the first flange is an upper flange of the compressor pump body, the compressor pump body also includes a lower flange, the lower flange is arranged below the upper flange, and the cylinder is arranged between the upper flange and the lower flange.

[0014] According to another aspect of the present invention, a compressor is provided, comprising a compressor pump body, wherein the compressor pump body is the above-mentioned compressor pump body.

[0015] The compressor pump body of the present invention includes a crankshaft, a first flange, a cylinder and a silencer structure. The compressor pump body is provided with a silencer structure so that the high-temperature and high-pressure refrigerant discharged through the exhaust port enters the first throttling channel. After the throttling effect of the first throttling channel, the high-temperature and high-pressure refrigerant will weaken the pressure pulsation in a certain frequency band; then, the high-temperature and high-pressure refrigerant enters the second throttling channel, and after passing through the expansion chamber, the exhaust pressure pulsation in some frequency bands can be further weakened; in this way, after throttling through the first throttling channel, the exhaust pressure pulsation of the refrigerant is still large at certain frequencies, that is, the transmission loss is small, and the exhaust pressure pulsation at the corresponding frequency can be weakened by setting the expansion chamber, so that the silencer structure has high transmission loss in a wider frequency range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of an embodiment of a compressor pump body according to the present invention is shown;

[0018] Figure 2 Shows Figure 1 A cross-sectional view of the compressor pump body at section AA;

[0019] Figure 3 Shows Figure 1 A cross-sectional view of the compressor pump body at section BB;

[0020] Figure 4 A schematic diagram showing a bottom view of a first flange of a compressor pump body according to the present invention;

[0021] Figure 5 A bottom view of a first flange of a compressor pump body according to the present invention is shown;

[0022] Figure 6 A schematic structural diagram of a cylinder of a compressor pump body according to the present invention is shown;

[0023] Figure 7 Shows Figure 6 A cross-sectional view of the cylinder of the compressor pump body at the CC section;

[0024] Figure 8 shows a cross-sectional view of an embodiment of a compressor according to the present invention;

[0025] Fig. 9 A schematic diagram showing a flow path of a refrigerant in a compressor according to the present invention;

[0026] Fig.10A comparison diagram of the transmission loss of the muffler in the prior art and the muffler structure of the present invention is shown.

[0027] The above drawings include the following reference numerals:

[0028] 10. crankshaft; 20. first flange; 21. first end face; 22. second end face; 23. exhaust port; 24. skirt; 25. fourth recessed portion; 30. cylinder; 31. first recessed portion; 32. second recessed portion; 33. third recessed portion; 40. muffler structure; 41. housing; 42. muffler structure outlet; 43. first throttling channel; 44. second throttling channel; 441. expansion chamber; 442. first communicating channel; 443. second communicating channel; 45. first throttling channel outlet; 46. second throttling channel inlet; 47. communicating port; 50. lower flange;

[0029] 12. Roller; 13. Screw; 14. Refrigeration oil;

[0030] 1. Dispenser components; 2. Upper cover assembly; 3. Shell assembly; 4. Rotor assembly; 5. Stator assembly; 6. Compressor pump body; 7. Lower cover; 8. Upper exhaust port; 9. Side exhaust port. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] The present invention provides a compressor pump body, please refer to Figures 1 to 9, including a crankshaft 10, a first flange 20 and a cylinder 30, the first flange 20 and the cylinder 30 are both sleeved on the crankshaft 10, and the first flange 20 is located above the cylinder 30; an exhaust port 23 is provided on the first flange 20; the compressor pump body also includes: a silencer structure 40, including a shell 41 and a silencer structure outlet 42, the shell 41 is covered on the first flange 20 and forms a first throttling channel 43 with the first flange 20, and the exhaust port 23 is connected to the first throttling channel 43; a second throttling channel 44 is formed between the first flange 20 and the cylinder 30, the second throttling channel 44 has an expansion chamber 441, and the second throttling channel 44 is connected to the first throttling channel 43, so that the refrigerant discharged from the exhaust port 23 passes through the first throttling channel 43 and the second throttling channel 44 in sequence and is discharged from the silencer structure outlet 42.

[0035] The compressor pump body of the present invention includes a crankshaft 10, a first flange 20, a cylinder 30 and a silencer structure 40. The compressor pump body is provided with a silencer structure 40 so that the high-temperature and high-pressure refrigerant discharged through the exhaust port 23 enters the first throttling channel 43. The high-temperature and high-pressure refrigerant will weaken the pressure pulsation of a certain frequency band after the throttling effect of the first throttling channel 43; then, the high-temperature and high-pressure refrigerant enters the second throttling channel 44, and can further weaken the exhaust pressure pulsation of some frequency bands after passing through the expansion chamber 441; in this way, after throttling through the first throttling channel 43, the exhaust pressure pulsation of the refrigerant is still large at certain frequencies, that is, the transmission loss is small, and the exhaust pressure pulsation at the corresponding frequency can be weakened by setting the expansion chamber 441, so that the silencer structure has high transmission loss within a wider frequency range.

[0036] In this embodiment, the second throttling channel 44 includes a first communicating channel 442, one end of the first communicating channel 442 is connected to the first throttling channel 43, and the other end of the first communicating channel 442 is connected to the expansion chamber 441; the flow cross-sectional area of ​​the first communicating channel 442 is smaller than the flow cross-sectional area of ​​the expansion chamber 441. Such a setting enables the muffler structure to have a high transmission loss in a wider frequency range.

[0037] In this embodiment, the second throttling channel 44 includes at least two expansion chambers 441, at least two expansion chambers 441 are arranged at intervals, and two adjacent expansion chambers 441 are connected through a second connecting channel 443; the flow cross-sectional area of ​​the second connecting channel 443 is smaller than the flow cross-sectional area of ​​the expansion chamber 441. Such an arrangement enables the muffler structure to have a high transmission loss in a wider frequency range.

[0038] In one embodiment, the second throttling passage 44 includes two expansion chambers 441. Such a setting ensures that the muffler structure has high transmission loss in a wider frequency range and has strong feasibility.

[0039] Specifically, the key dimensions of the expansion chamber can be designed according to specific conditions to reduce the exhaust pressure pulsation at the corresponding frequency, so that the muffler structure has high transmission loss in a wider frequency range. The key dimensions of the expansion chamber are the flow cross-sectional area of ​​the expansion chamber. In one embodiment, the key dimensions of the expansion chamber are: Figure 6 and Figure 7 The expansion chamber inner radius R1, the expansion chamber outer radius R2 and the expansion chamber depth H1 are calculated, that is, the value of (R2-R1)*H1, the expansion ratio of the expansion chamber is changed, the maximum transmission loss frequency of the expansion chamber is adjusted, and the maximum transmission loss frequency of the expansion chamber is adjusted to the minimum frequency of the first throttling channel 43, so that the transmission loss of the first throttling channel 43 and the second throttling channel 44 are complementary, so that the silencer structure has a higher transmission loss in a wide frequency band. After simulating the transmission loss of the silencer structure, the transmission loss of the silencer structure in the entire wide frequency band of 1K-3K is significantly higher than that of the existing solution, such as Fig.10 shown.

[0040] in, Fig.10 Curve 1 in the figure is the transmission loss value of the silencer structure of the present application within a wide frequency band, and curve 2 is the transmission loss value of the existing silencer within a wide frequency band; specifically, the horizontal axis represents the frequency band, and the vertical axis represents the transmission loss.

[0041] In this embodiment, the first flange 20 has a first end face 21 and a second end face 22 that are arranged opposite to each other, and the first end face 21 is located above the second end face 22; the cylinder 30 is provided with a first recessed portion 31, a second recessed portion 32 and a third recessed portion 33, the first recessed portion 31 and the second end face 22 form an expansion chamber 441, the second recessed portion 32 and the second end face 22 form a first connecting passage 442, and the third recessed portion 33 and the second end face 22 form a second connecting passage 443. Specifically, the first recessed portion 31, the second recessed portion 32 and the third recessed portion 33 are all grooves. Such a setting optimizes the flow path of the second throttling passage 44.

[0042] In this embodiment, the first flange 20 has a first end face 21 and a second end face 22 that are oppositely arranged, the first end face 21 is located above the second end face 22, and the outer shell 41 is covered on the first end face 21; the exhaust port 23 is located on the first end face 21, and the outer shell 41 is covered on the exhaust port 23.

[0043] In this embodiment, the muffler structure 40 has a first throttle channel outlet 45 connected to the first throttle channel 43 and a second throttle channel inlet 46 connected to the first connecting channel 442. The first throttle channel outlet 45 is arranged on the first end surface 21, and the second throttle channel inlet 46 is arranged on the second end surface 22. The first throttle channel outlet 45 is connected to the second throttle channel inlet 46. Specifically, a third connecting channel is arranged on the first flange 20, and the first throttle channel outlet 45 and the second throttle channel inlet 46 are connected through the third connecting channel.

[0044] In this embodiment, the silencer structure outlet 42 is arranged on the side wall of the first flange 20, and the silencer structure outlet 42 is arranged opposite to the skirt 24 of the first flange 20. Such an arrangement enables the refrigerant after throttling through the first throttling channel 43 and the second throttling channel 44 to be discharged from the silencer structure outlet 42 and directly act on the skirt 24, without affecting the operation of the motor rotor of the compressor and the oil return inside the compressor, thereby improving the noise level and energy efficiency of the compressor, and solving the problems of electromagnetic noise generated by exhaust pulsation at the outlet of the existing muffler or lack of oil in the compressor.

[0045] In this embodiment, the first flange 20 has a first end face 21 and a second end face 22 that are arranged opposite to each other, and the first end face 21 is located above the second end face 22; the first flange 20 is provided with a fourth recessed portion 25, and the fourth recessed portion 25 forms a communication port 47 and a muffler structure outlet 42, and the communication port 47 is connected to the muffler structure outlet 42, and the communication port 47 is located on the second end face 22, and the communication port 47 is connected to the second throttling channel 44. Such an arrangement realizes that the muffler structure outlet 42 is connected to the second throttling channel 44.

[0046] Specifically, the communication port 47 is communicated with the last expansion chamber 441 of the at least two expansion chambers 441 , and the last expansion chamber 441 refers to the last expansion chamber 441 through which the refrigerant flows.

[0047] In this embodiment, the first flange 20 is an upper flange of the compressor pump body. The compressor pump body further includes a lower flange 50 . The lower flange 50 is arranged below the upper flange. The cylinder 30 is arranged between the upper flange and the lower flange 50 .

[0048] During specific implementation, after the cylinder 30 compresses the refrigerant, the high-temperature and high-pressure refrigerant enters the first throttling channel 43 through the exhaust port 23 of the first flange 20. The high-temperature and high-pressure refrigerant passing through the first throttling channel 43 will weaken the pressure pulsation in a certain frequency band; then, the high-temperature and high-pressure refrigerant passes through the first throttling channel outlet 45 and then enters the second throttling channel 44 through the second throttling channel inlet 46; after throttling through the first throttling channel 43, the exhaust pressure pulsation of the refrigerant is still large at certain frequencies (small transmission loss), and the exhaust pressure pulsation at the corresponding frequency can be weakened by setting two expansion chambers 441, so that the silencer structure has high transmission loss in a wider frequency range.

[0049] In specific implementation, the refrigeration oil circulation circuit inside the compressor is as follows Fig. 9 As shown, the rotor assembly 4 drives the crankshaft 10 to rotate and pump the refrigeration oil 14 from the lower part of the shell assembly 3 to the top of the crankshaft 10, and then the refrigeration oil is thrown to the inner wall of the shell assembly 3 under the action of the centrifugal force of the rotor assembly 4, and then flows down along the inner wall of the shell assembly 3 to the lower part of the shell assembly 3 to form a closed oil circuit. In the existing side discharge scheme of the muffler, the high-pressure refrigerant discharged from the side exhaust port 9 directly acts on the inner wall of the shell assembly 3 to prevent the refrigeration oil from refrigerating, resulting in oil shortage inside the compressor, higher compressor power, and reduced energy efficiency; in the existing upper discharge scheme, the high-pressure refrigerant discharged from the upper exhaust port 8 directly acts on the rotor assembly 4, resulting in unstable rotor operation and electromagnetic noise. The silencer structure of the present application designs the outlet on the side of the first flange 20, and the discharged high-pressure refrigerant directly acts on the skirt 24 of the first flange, which will not affect the refrigeration oil refrigeration inside the compressor, nor will it impact the rotor assembly to cause the rotor assembly to run unstable and generate electromagnetic noise, which can effectively improve the energy efficiency of the compressor and reduce the noise of the compressor.

[0050] In this embodiment, the compressor pump body further includes a roller 12 and a screw 13 .

[0051] The present application reasonably designs a silencer structure under limited space, controls exhaust pressure pulsation, does not introduce other noise, and ensures energy efficiency to improve the performance of the compressor and air conditioner.

[0052] The beneficial effects of the present application are: 1. The refrigerant first passes through the first throttling channel 43 and then through the second throttling channel 44. The transmission losses of the first throttling channel 43 and the second throttling channel 44 complement each other, so that the silencer structure 40 has high transmission losses in a wider frequency range; 2. The outlet position of the silencer structure 40 is optimized, which solves the electromagnetic noise caused by exhaust impact force and pressure pulsation and the problem of compressor oil return obstruction, thereby improving the sound quality and energy efficiency of the compressor and air conditioner.

[0053] The present invention also includes a compressor, please refer to Figure 8 and Fig. 9 , including a compressor pump body 6, wherein the compressor pump body 6 is the compressor pump body in the above embodiment.

[0054] Specifically, the compressor further includes a liquid distributor component 1 , an upper cover assembly 2 , a housing assembly 3 , a rotor assembly 4 , a stator assembly 5 , and a lower cover 7 .

[0055] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0056] The compressor pump body of the present invention includes a crankshaft 10, a first flange 20, a cylinder 30 and a silencer structure 40. The compressor pump body is provided with a silencer structure 40 so that the high-temperature and high-pressure refrigerant discharged through the exhaust port 23 enters the first throttling channel 43. The high-temperature and high-pressure refrigerant will weaken the pressure pulsation of a certain frequency band after the throttling effect of the first throttling channel 43; then, the high-temperature and high-pressure refrigerant enters the second throttling channel 44, and can further weaken the exhaust pressure pulsation of some frequency bands after passing through the expansion chamber 441; in this way, after throttling through the first throttling channel 43, the exhaust pressure pulsation of the refrigerant is still large at certain frequencies, that is, the transmission loss is small, and the exhaust pressure pulsation at the corresponding frequency can be weakened by setting the expansion chamber 441, so that the silencer structure has high transmission loss within a wider frequency range.

[0057] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0058] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A compressor pump body, characterized in that: The compressor comprises a crankshaft (10), a first flange (20) and a cylinder (30), wherein the first flange (20) and the cylinder (30) are both sleeved on the crankshaft (10), and the first flange (20) is located above the cylinder (30); an exhaust port (23) is provided on the first flange (20); and the compressor pump body further comprises: A silencer structure (40), comprising a shell (41) and a silencer structure outlet (42), wherein the shell (41) is covered on the first flange (20) and forms a first throttling channel (43) with the first flange (20), and the exhaust port (23) is in communication with the first throttling channel (43); A second throttling channel (44) is formed between the first flange (20) and the cylinder (30), the second throttling channel (44) having an expansion chamber (441), and the second throttling channel (44) is connected to the first throttling channel (43), so that the refrigerant discharged from the exhaust port (23) passes through the first throttling channel (43) and the second throttling channel (44) in sequence and is then discharged from the silencer structure outlet (42); The sound-absorbing structure outlet (42) is arranged on the side wall of the first flange (20), and the sound-absorbing structure outlet (42) is arranged opposite to the skirt (24) of the first flange (20); The first flange (20) has a first end face (21) and a second end face (22) which are arranged opposite to each other, and the first end face (21) is located above the second end face (22); a fourth recessed portion (25) is provided on the first flange (20), and the fourth recessed portion (25) forms a connecting port (47) and the silencer structure outlet (42), and the connecting port (47) is connected to the silencer structure outlet (42); the connecting port (47) is located on the second end face (22), and the connecting port (47) is connected to the second throttling channel (44).

2. The compressor pump body according to claim 1, characterized in that: The second throttling channel (44) comprises a first communicating channel (442), one end of the first communicating channel (442) is connected to the first throttling channel (43), and the other end of the first communicating channel (442) is connected to the expansion chamber (441); The flow cross-sectional area of ​​the first connecting channel (442) is smaller than the flow cross-sectional area of ​​the expansion chamber (441).

3. The compressor pump body according to claim 2, characterized in that: The second throttling channel (44) comprises at least two expansion chambers (441), the at least two expansion chambers (441) are arranged at intervals, and two adjacent expansion chambers (441) are connected via a second communication channel (443); The flow cross-sectional area of ​​the second connecting channel (443) is smaller than the flow cross-sectional area of ​​the expansion chamber (441).

4. The compressor pump body according to claim 3, characterized in that: The first flange (20) has a first end face (21) and a second end face (22) which are arranged opposite to each other, and the first end face (21) is located above the second end face (22); the cylinder (30) is provided with a first recessed portion (31), a second recessed portion (32) and a third recessed portion (33), the first recessed portion (31) and the second end face (22) form the expansion chamber (441), the second recessed portion (32) and the second end face (22) form the first connecting channel (442), and the third recessed portion (33) and the second end face (22) form the second connecting channel (443).

5. The compressor pump body according to claim 2, characterized in that: The first flange (20) has a first end face (21) and a second end face (22) which are arranged opposite to each other, and the first end face (21) is located above the second end face (22); the outer shell (41) is covered on the first end face (21); the exhaust port (23) is located on the first end face (21), and the outer shell (41) is covered on the exhaust port (23).

6. The compressor pump body according to claim 5, characterized in that: The silencer structure (40) comprises a first throttling channel outlet (45) connected to the first throttling channel (43) and a second throttling channel inlet (46) connected to the first connecting channel (442); the first throttling channel outlet (45) is arranged on the first end surface (21), the second throttling channel inlet (46) is arranged on the second end surface (22), and the first throttling channel outlet (45) and the second throttling channel inlet (46) are connected.

7. The compressor pump body according to any one of claims 1 to 6, characterized in that: The first flange (20) is an upper flange of the compressor pump body, and the compressor pump body further comprises a lower flange (50), wherein the lower flange (50) is arranged below the upper flange, and the cylinder (30) is arranged between the upper flange and the lower flange (50).

8. A compressor, comprising a compressor pump body (6), characterized in that: The compressor pump body (6) is the compressor pump body according to any one of claims 1 to 7.

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