CN112483396A

CN112483396A - Compressor pump body and compressor

Info

Publication number: CN112483396A
Application number: CN202011503764.4A
Authority: CN
Inventors: 张科; 叶晓飞; 康炎平
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai; Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-03-12

Abstract

The invention provides a compressor pump body and a compressor. The compressor pump body comprises a crankshaft, a first flange and a cylinder, wherein the first flange and the cylinder are sleeved on the crankshaft, and the first flange is positioned above the cylinder; an exhaust port is arranged on the first flange; the compressor pump body still includes: the silencing structure comprises a shell and a silencing structure outlet, the shell is covered on the first flange and forms a first throttling channel with the first flange, and the exhaust port is communicated with the first throttling channel; a second throttling channel is formed between the first flange and the cylinder and is provided with an expansion chamber, and the second throttling channel is communicated with the first throttling channel, so that the refrigerant discharged from the exhaust port sequentially passes through the first throttling channel and the second throttling channel and then is discharged from an outlet of the silencing structure. The compressor pump body solves the problem that the silencer in the prior art is low in transmission loss in a wide frequency range.

Description

Compressor pump body and compressor

Technical Field

The invention relates to the field of compressors, in particular to a compressor pump body and a compressor.

Background

The rolling rotor compressor compresses a refrigerant through a pump body structure, compresses the refrigerant from a low-temperature low-pressure state to a high-temperature high-pressure state, and discharges the refrigerant through an exhaust port of the pump body structure, and strong airflow impact force and pressure pulsation are generated due to high pressure of the refrigerant in the exhaust process to cause wide-frequency-band pneumatic noise; the air flow impact force and the pressure pulsation in the exhaust process simultaneously act on the mechanical structure of the compressor to generate mechanical noise; and the exhaust pressure pulsation and the conference are transmitted to an air conditioner indoor unit along with the flowing of the refrigerant to cause the transmission sound of the air conditioner. Therefore, the quality of the exhaust pressure pulsation control is directly related to the sound quality of the compressor and the air conditioner.

At present, the rolling rotor compressor mainly controls exhaust pressure pulsation by designing a resistant muffler at an exhaust port, however, the existing muffler design has more defects: the design of the existing silencer is influenced by the installation height of a compressor motor and a pump body limiting screw, so that the transmission loss of the existing silencer in certain frequency bands is low; the existing silencer mainly has two forms of upper exhaust and side exhaust, the impact force of exhaust airflow of the upper exhaust silencer and pressure pulsation directly act on a motor rotor to cause unstable operation of a compressor rotor to generate electromagnetic noise, the impact force of the exhaust airflow of the side exhaust silencer acts on a shell to cause oil return of refrigeration oil in the compressor to be blocked, so that the oil quantity in the compressor is reduced, the power is increased, the energy efficiency is reduced, the oil quantity in refrigerant circulation of a system is increased, the heat exchange efficiency is reduced, and the energy efficiency of the system is reduced.

Disclosure of Invention

The invention mainly aims to provide a compressor pump body and a compressor, and aims to solve the problem that a silencer in the prior art is low in transmission loss in a wide frequency range.

In order to achieve the above object, according to one aspect of the present invention, there is provided a compressor pump body, including a crankshaft, a first flange and a cylinder, wherein 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 arranged on the first flange; the compressor pump body still includes: the silencing structure comprises a shell and a silencing structure outlet, the shell is covered on the first flange and forms a first throttling channel with the first flange, and the exhaust port is communicated with the first throttling channel; a second throttling channel is formed between the first flange and the cylinder and is provided with an expansion chamber, and the second throttling channel is communicated with the first throttling channel, so that the refrigerant discharged from the exhaust port sequentially passes through the first throttling channel and the second throttling channel and then is discharged from an outlet of the silencing structure.

Further, the second throttling passage comprises a first communicating passage, one end of the first communicating passage is communicated with the first throttling passage, and the other end of the first communicating passage is communicated with the expansion chamber; the flow cross-sectional area of the first communication passage is smaller than the flow cross-sectional area of the expansion chamber.

Furthermore, the second throttling channel comprises at least two expansion chambers which are arranged at intervals, and two adjacent expansion chambers are communicated through a second communication channel; the flow cross-sectional area of the second communication passage is smaller than the flow cross-sectional area of the expansion chamber.

Further, the first flange is provided with a first end face and a second end face which are oppositely arranged, and the first end face is positioned above the second end face; the cylinder is provided with a first depressed part, a second depressed part and a third depressed part, the first depressed part and the second end surface form an expansion chamber, the second depressed part and the second end surface form a first communication channel, and the third depressed part and the second end surface form a second communication channel.

Further, the first flange is provided with a first end face and a second end face which are oppositely arranged, and the first end face is positioned above the second end face; the shell is covered on the first end surface; the exhaust port is located on the first end face, and the shell cover is arranged on the exhaust port.

Furthermore, the silencing structure is provided with a first throttling channel outlet communicated with the first throttling channel and a second throttling channel inlet communicated with the first communicating channel, the first throttling channel outlet is arranged on the first end face, the second throttling channel inlet is arranged on the second end face, and the first throttling channel outlet is communicated with the second throttling channel inlet.

Further, the outlet of the silencing structure is arranged on the side wall of the first flange, and the outlet of the silencing structure is arranged opposite to the skirt edge of the first flange.

Further, the first flange is provided with a first end face and a second end face which are oppositely arranged, and the first end face is positioned above the second end face; and a fourth recessed part is arranged on the first flange, a communication port and a silencing structure outlet are formed in the fourth recessed part, the communication port is communicated with the silencing structure outlet, the communication port is positioned on the second end surface, and the communication port is communicated with the second throttling channel.

Further, the first flange is an upper flange of the compressor pump body, the compressor pump body further comprises a lower flange, the lower flange is arranged below the upper flange, and the air cylinder is arranged between the upper flange and the lower flange.

According to another aspect of the present invention, there is provided a compressor comprising a compressor pump body, wherein the compressor pump body is the above compressor pump body.

The compressor pump body comprises a crankshaft, a first flange, a cylinder and a silencing structure, wherein the silencing structure is arranged on the compressor pump body, so that a high-temperature and high-pressure refrigerant discharged through an exhaust port enters a first throttling channel, and the high-temperature and high-pressure refrigerant can weaken pressure pulsation of a certain frequency band after being throttled by the first throttling channel; then, the high-temperature and high-pressure refrigerant enters a second throttling channel and passes through an expansion chamber to further weaken the exhaust pressure pulsation of partial frequency range; therefore, the refrigerant exhaust pressure pulsation after being throttled by the first throttling channel is still larger at certain frequencies, namely the transmission loss is small, and the exhaust pressure pulsation at the corresponding frequency can be weakened through the arrangement of the expansion chamber, so that the silencing structure has high transmission loss in a wider frequency range.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

figure 1 shows a schematic structural view of an embodiment of a compressor pump body according to the invention;

FIG. 2 shows a cross-sectional view at section A-A of the compressor pump body of FIG. 1;

FIG. 3 shows a cross-sectional view at section B-B of the compressor pump body of FIG. 1;

FIG. 4 shows a schematic view from below of a first flange of the compressor pump body according to the invention;

FIG. 5 shows a bottom view of the first flange of the compressor pump body according to the invention;

figure 6 shows a schematic structural view of the cylinder of the compressor pump body according to the invention;

FIG. 7 shows a section at C-C of the cylinder of the compressor pump body in FIG. 6;

FIG. 8 shows a cross-sectional view of an embodiment of a compressor according to the present invention;

fig. 9 is a schematic view illustrating a flow path of a refrigerant in a compressor according to the present invention;

fig. 10 shows a comparison of transmission loss of a muffler in the prior art and a sound deadening structure of the present invention.

Wherein the figures include the following reference numerals:

10. a crankshaft; 20. a first flange; 21. a first end face; 22. a second end face; 23. an exhaust port; 24. a skirt edge; 25. a fourth recess; 30. a cylinder; 31. a first recess; 32. a second recess; 33. a third recessed portion; 40. a sound deadening structure; 41. a housing; 42. an outlet of the silencing structure; 43. a first throttle channel; 44. a second throttling passage; 441. an expansion chamber; 442. a first communicating passage; 443. a second communicating passage; 45. a first throttling passage outlet; 46. a second throttling passage inlet; 47. a communication port; 50. a lower flange;

12. a roller; 13. a screw; 14. a refrigeration oil;

1. a dispenser component; 2. an upper cover assembly; 3. a housing assembly; 4. a rotor assembly; 5. a stator assembly; 6. a compressor pump body; 7. a lower cover; 8. an upper vent; 9. a side exhaust port.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The invention provides a pump body of a compressor, please refer to fig. 1 to 9, which comprises a crankshaft 10, a first flange 20 and a cylinder 30, wherein the first flange 20 and the cylinder 30 are sleeved on the crankshaft 10, and the first flange 20 is positioned above the cylinder 30; the first flange 20 is provided with an exhaust port 23; the compressor pump body still includes: the silencing structure 40 comprises a shell 41 and a silencing 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 communicated with the first throttling channel 43; a second throttling passage 44 is formed between the first flange 20 and the cylinder 30, the second throttling passage 44 has an expansion chamber 441, and the second throttling passage 44 is communicated with the first throttling passage 43, so that the refrigerant discharged from the exhaust port 23 passes through the first throttling passage 43 and the second throttling passage 44 in sequence and is discharged from the sound-deadening structure outlet 42.

The compressor pump body comprises a crankshaft 10, a first flange 20, a cylinder 30 and a silencing structure 40, wherein the silencing structure 40 is arranged on the compressor pump body, so that a high-temperature and high-pressure refrigerant discharged through an exhaust port 23 enters a first throttling channel 43, and the high-temperature and high-pressure refrigerant can weaken pressure pulsation of a certain frequency band after being throttled by the first throttling channel 43; then, the high-temperature and high-pressure refrigerant enters the second throttling channel 44, and the exhaust pressure pulsation of a part of frequency bands can be further weakened after passing through the expansion chamber 441; thus, the refrigerant discharge pressure pulsation after being throttled by the first throttling passage 43 is still large at certain frequencies, that is, the transmission loss is small, and the discharge pressure pulsation at the corresponding frequency can be weakened by the arrangement of the expansion chamber 441, so that the sound attenuation structure has high transmission loss in a wide frequency range.

In the present embodiment, the second throttle passage 44 includes a first communicating passage 442, one end of the first communicating passage 442 communicates with the first throttle passage 43, and the other end of the first communicating passage 442 communicates with the expansion chamber 441; the flow cross-sectional area of the first communication passage 442 is smaller than the flow cross-sectional area of the expansion chamber 441. Such an arrangement allows the sound-deadening structure to have a high transmission loss in a wide frequency range.

In the present embodiment, the second throttle passage 44 includes at least two expansion chambers 441, the at least two expansion chambers 441 are disposed at intervals, and adjacent two expansion chambers 441 are communicated with each other through a second communication passage 443; the flow cross-sectional area of the second communication passage 443 is smaller than the flow cross-sectional area of the extension chamber 441. Such an arrangement allows the sound-deadening structure to have a high transmission loss in a wide frequency range.

In one embodiment, the second throttling passage 44 includes two expansion chambers 441. The arrangement ensures that the silencing structure has high transmission loss in a wider frequency range, and has stronger implementability.

Specifically, the critical dimension of the expansion chamber can be designed according to specific situations, exhaust pressure pulsation at corresponding frequency is weakened, and the sound attenuation structure has high transmission loss in a wide frequency range. Wherein, the key size of the expansion chamber is the flow cross-sectional area of the expansion chamber. In one embodiment, the critical dimensions of the expansion chamber are calculated from the expansion chamber inner radius R1, the expansion chamber outer radius R2, and the expansion chamber depth H1 in fig. 6 and 7, i.e., (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 losses of the first throttling channel 43 and the second throttling channel 44 are complemented, and the sound-deadening structure has a high transmission loss in a wide frequency band. Through the transmission loss of the simulated silencing structure, the transmission loss of the silencing structure in the whole wide frequency band of 1K-3K is obviously higher than that of the existing scheme, as shown in figure 10.

Wherein, curve No. 1 in fig. 10 is a transmission loss value of the silencing structure of the present application in a wide frequency band, and curve No. 2 is a transmission loss value of the conventional silencer in a wide frequency band; specifically, the horizontal axis represents a frequency band, and the vertical axis represents a transmission loss.

In the present embodiment, the first flange 20 has a first end face 21 and a second end face 22 which are oppositely arranged, and the first end face 21 is located above the second end face 22; the cylinder 30 is provided with a first recess 31, a second recess 32, and a third recess 33, the first recess 31 and the second end face 22 forming an expansion chamber 441, the second recess 32 and the second end face 22 forming a first communication passage 442, and the third recess 33 and the second end face 22 forming a second communication passage 443. Specifically, the first recess 31, the second recess 32, and the third recess 33 are all grooves. This arrangement optimizes the flow path of the second choke passage 44.

In the embodiment, the first flange 20 has a first end face 21 and a second end face 22 which are oppositely arranged, the first end face 21 is located above the second end face 22, and the housing 41 is covered on the first end face 21; the exhaust port 23 is located on the first end surface 21, and the housing 41 covers the exhaust port 23.

In the present embodiment, the sound deadening structure 40 has a first throttle passage outlet 45 communicating with the first throttle passage 43 and a second throttle passage inlet 46 communicating with the first communicating passage 442, the first throttle passage outlet 45 being provided on the first end face 21, the second throttle passage inlet 46 being provided on the second end face 22, the first throttle passage outlet 45 and the second throttle passage inlet 46 communicating with each other. Specifically, the first flange 20 is provided with a third communication passage, and the first throttling passage outlet 45 and the second throttling passage inlet 46 are communicated through the third communication passage.

In this embodiment, the sound attenuating structure outlet 42 is disposed on the sidewall of the first flange 20, and the sound attenuating structure outlet 42 is disposed opposite the skirt 24 of the first flange 20. Due to the arrangement, the refrigerant throttled by the first throttling channel 43 and the second throttling channel 44 is discharged by the outlet 42 of the silencing structure and then directly acts on the skirt edge 24, the operation of a motor rotor of the compressor and the oil return inside the compressor are not influenced, the noise level and the energy efficiency of the compressor are improved, and the problem of electromagnetic noise generated by the exhaust pulsation of the outlet of the existing silencer or oil shortage in the compressor is solved.

In the present embodiment, the first flange 20 has a first end face 21 and a second end face 22 which are oppositely arranged, 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, the fourth recessed portion 25 forms a communication port 47 and a sound-deadening structure outlet 42, the communication port 47 is communicated with the sound-deadening structure outlet 42, the communication port 47 is located on the second end surface 22, and the communication port 47 is communicated with the second throttling passage 44. This arrangement achieves that the sound-deadening structure outlet 42 communicates with the second throttle passage 44.

Specifically, the communication port 47 communicates 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.

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 disposed below the upper flange, and the cylinder 30 is disposed between the upper flange and the lower flange 50.

In 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, and the high-temperature and high-pressure refrigerant can weaken pressure pulsation of a certain frequency band through the first throttling channel 43; 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; the refrigerant discharge pressure pulsation after being throttled by the first throttling passage 43 is still large (transmission loss is small) at some frequencies, and the discharge pressure pulsation at the corresponding frequency can be weakened by the arrangement of the two expansion chambers 441, so that the silencing structure has high transmission loss in a wide frequency range.

In specific implementation, as shown in fig. 9, the rotor assembly 4 drives the crankshaft 10 to rotate so as to pump the refrigerant oil 14 from the lower portion of the housing assembly 3 to the top of the crankshaft 10, and then the refrigerant oil is thrown to the inner wall of the housing assembly 3 under the centrifugal force of the rotor assembly 4, and then flows down to the lower portion of the housing assembly 3 along the inner wall of the housing assembly 3 to form a closed oil path. In the existing silencer side-exhaust scheme, high-pressure refrigerant exhausted from a side exhaust port 9 directly acts on the inner wall of a shell assembly 3 to prevent backflow of refrigeration oil, so that the inside of a compressor is lack of oil, the power of the compressor is high, and the energy efficiency is reduced; in the existing upper discharging scheme, the high-pressure refrigerant discharged from the upper discharging port 8 directly acts on the rotor assembly 4, so that the rotor is unstable in operation and generates electromagnetic noise. The utility model provides a amortization structure is with export design on the side of first flange 20, and on the shirt rim 24 of first flange was directly acted on to exhaust high pressure refrigerant, can not influence the backward flow of the inside refrigeration oil of compressor, can not assault the rotor subassembly yet and lead to the unstable electromagnetic noise that produces of rotor subassembly operation, can effectively improve the compressor efficiency, reduces the compressor noise.

In this embodiment, the compressor pump body also comprises rollers 12 and screws 13.

The noise reduction structure is reasonably designed under the condition that the space is limited, exhaust pressure pulsation is controlled, other noises are not introduced, and the performance of the compressor and the air conditioner is improved under the condition of ensuring the energy efficiency.

The beneficial effect of this application does: 1. the refrigerant passes through the first throttling channel 43 and then passes through the second throttling channel 44, and the transmission losses of the first throttling channel 43 and the second throttling channel 44 are mutually supplemented, so that the silencing structure 40 has high transmission loss in a wider frequency range; 2. the outlet position of the silencing structure 40 is optimized, the problems of electromagnetic noise and blocked oil return of the compressor caused by exhaust impact force and pressure pulsation are solved, and the sound quality and the energy efficiency of the compressor and the air conditioner are improved.

The present invention further includes a compressor, please refer to fig. 8 and 9, which includes a compressor pump body 6, wherein the compressor pump body 6 is the compressor pump body in the above embodiments.

Specifically, the compressor further comprises a liquid distributor component 1, an upper cover component 2, a shell component 3, a rotor component 4, a stator component 5 and a lower cover 7.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The compressor pump body is characterized by comprising a crankshaft (10), a first flange (20) and a cylinder (30), wherein the first flange (20) and the cylinder (30) are sleeved on the crankshaft (10), and the first flange (20) is positioned above the cylinder (30); an exhaust port (23) is arranged on the first flange (20); the compressor pump body still includes:

the silencing structure (40) comprises a shell (41) and a silencing structure outlet (42), the shell (41) is arranged on the first flange (20) in a covering mode and forms a first throttling channel (43) with the first flange (20), and the exhaust port (23) is communicated 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) is provided with an expansion chamber (441), and the second throttling channel (44) is communicated with 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 then is discharged from the sound attenuation structure outlet (42).

2. The compressor pump body according to claim 1, wherein the second throttling passage (44) comprises a first communication passage (442), one end of the first communication passage (442) communicating with the first throttling passage (43), the other end of the first communication passage (442) communicating with the expansion chamber (441);

the first communication passage (442) has a flow cross-sectional area smaller than that of the expansion chamber (441).

3. The compressor pump body according to claim 2, wherein the second throttling channel (44) comprises at least two expansion chambers (441), the at least two expansion chambers (441) are arranged at intervals, and adjacent two expansion chambers (441) are communicated with each other through a second communication channel (443);

the flow cross-sectional area of the second communication passage (443) is smaller than the flow cross-sectional area of the expansion chamber (441).

4. The compressor pump body according to claim 3, wherein the first flange (20) has a first end face (21) and a second end face (22) arranged opposite, the first end face (21) being located above the second end face (22); a first recess (31), a second recess (32), and a third recess (33) are provided on the cylinder (30), the first recess (31) and the second end face (22) forming the expansion chamber (441), the second recess (32) and the second end face (22) forming the first communication passage (442), and the third recess (33) and the second end face (22) forming the second communication passage (443).

5. The compressor pump body according to claim 2, wherein the first flange (20) has a first end face (21) and a second end face (22) arranged opposite, the first end face (21) being located above the second end face (22); the shell (41) is covered on the first end face (21); the exhaust port (23) is located on the first end face (21), and the housing (41) covers the exhaust port (23).

6. Compressor pump body according to claim 5, wherein the silencing structure (40) has a first throttling channel outlet (45) communicating with the first throttling channel (43) and a second throttling channel inlet (46) communicating with the first communication channel (442), the first throttling channel outlet (45) being provided on the first end face (21), the second throttling channel inlet (46) being provided on the second end face (22), the first throttling channel outlet (45) and the second throttling channel inlet (46) being in communication.

7. Compressor pump body according to claim 1, characterized in that the silencing structure outlet (42) is provided on the side wall of the first flange (20), the silencing structure outlet (42) being provided opposite the skirt (24) of the first flange (20).

8. The compressor pump body according to claim 7, wherein the first flange (20) has a first end face (21) and a second end face (22) arranged opposite, the first end face (21) being located above the second end face (22); the first flange (20) is provided with a fourth sunken portion (25), the fourth sunken portion (25) forms a communication opening (47) and the sound attenuation structure outlet (42), the communication opening (47) is communicated with the sound attenuation structure outlet (42), the communication opening (47) is located on the second end face (22), and the communication opening (47) is communicated with the second throttling channel (44).

9. The compressor pump body according to any one of claims 1 to 8, wherein the first flange (20) is an upper flange of the compressor pump body, the compressor pump body further comprising a lower flange (50), the lower flange (50) being arranged below the upper flange, the cylinder (30) being arranged between the upper flange and the lower flange (50).

10. Compressor comprising a compressor pump body (6), characterized in that said compressor pump body (6) is a compressor pump body according to any one of claims 1 to 9.