Silencing assembly and compressor

Abstract

The invention relates to the field of compressor noise reduction, and provides a noise reduction assembly and a compressor, the noise reduction assembly comprises an upper cylinder cover, the upper cylinder cover comprises a base body and an exhaust hole penetrating through the base body in the axial direction of the base body, and the base body is provided with an exhaust slope surrounding the exhaust hole; the silencer comprises a plurality of silencer air outlets, the silencer covers the upper cylinder cover, and a space defined by the silencer and the upper cylinder cover forms a silencer cavity; the at least one flow guide device is positioned in the silencer cavity and is arranged between the exhaust slope and the silencer; the flow guide device is of a convex structure; the refrigerant exhausted from the exhaust hole passes through the exhaust slope, changes the flowing direction under the action of the flow guide device, and flows out of the silencer from the silencer air outlet. According to the silencing assembly and the compressor, the flow guiding device is additionally arranged to guide the high-temperature and high-pressure refrigerant from the exhaust port, so that the airflow noise of the compressor is reduced, and the performance loss of the compressor is reduced.

Description

Technical Field

[0001] The invention relates to the field of compressor silencing, and in particular to a silencing component and a compressor. Background Art

[0002] The working cycle of a rotary compressor can be divided into three processes: suction, compression and exhaust. Airflow noise is an important noise source for rotary compressors. During the exhaust process, high-temperature and high-pressure refrigerant enters the muffler from the cylinder through the exhaust port. Because the muffler has a small volume and a sudden change in area, the airflow hits the wall, causing internal flow turbulence, resulting in performance loss and high airflow noise.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] In view of this, the present invention provides a silencer assembly and a compressor.

[0005] One aspect of the present invention provides a muffler assembly for a compressor, comprising:

[0006] An upper cylinder cover, the upper cylinder cover comprises a base body and an exhaust hole penetrating the base body along the axial direction of the base body, and the base body has an exhaust slope around the exhaust hole;

[0007] a muffler, the muffler comprising a plurality of muffler air outlets, the muffler covering the upper cylinder head, the space enclosed by the muffler and the upper cylinder head constituting a muffler cavity; and

[0008] At least one flow guide device is located in the muffler cavity and arranged between the exhaust slope and the muffler; the flow guide device is a protruding structure; the refrigerant discharged from the exhaust hole passes through the exhaust slope, changes its flow direction under the action of the flow guide device, and flows out of the muffler from the muffler outlet.

[0009] In some embodiments, the flow guide device is fixedly connected to the exhaust ramp.

[0010] In some embodiments, the guide device is fixedly connected to the muffler, and its width gradually increases in the vertical upward direction along the exhaust slope.

[0011] In some embodiments, the guide device is a sheet-like protruding structure. In the sheet-like cross-section of the guide device, the height of the guide device is h and the bottom width is l, and both satisfy h / l≧0.15.

[0012] In some embodiments, the upward direction of the sheet-shaped cross section of the guide device and parallel to the exhaust slope forms a first angle with the incoming flow direction of the refrigerant, and the absolute value range of the first angle is 0 to 60 degrees.

[0013] In some embodiments, the absolute value of the first angle ranges from 20° to 40°.

[0014] In some embodiments, a second angle is formed between the sheet-like cross-section of the guide device and the slope surface of the exhaust slope where the guide device is located, and the value range of the second angle is 45° to 135°.

[0015] In some embodiments, the second angle has a value ranging from 60° to 120°.

[0016] In some embodiments, the tail of the guide device has a third angle, and the value range of the third angle is 30° to 150°.

[0017] In some embodiments, the number of flow guide devices included in the muffler assembly is 1 to 10.

[0018] In some embodiments, when the number of the guide devices is greater than 1, the guide devices are distributed in a symmetrical fan shape.

[0019] In some embodiments, the number of flow guide devices provided by the muffler assembly is 2 to 4;

[0020] When the number of the flow guiding devices is 2 to 3, the flow guiding devices are arranged in a row;

[0021] When the number of the guide devices is 4, the guide devices are arranged in two rows.

[0022] In some embodiments, the flow guide device is a V-shaped protruding structure, and the refrigerant flows through the flow guide device from the bottom end to the top end of the V.

[0023] In some embodiments, the upper cylinder head further includes a valve seat, which is recessed in the base along the axial direction of the base, the exhaust hole is located in the valve seat, and the exhaust hole is inclined toward the outside of the base along the exhaust slope from the bottom to the top.

[0024] In some embodiments, the upper cylinder cover also includes a valve plate, which is located on the valve seat. The valve plate can cover the exhaust hole in an openable and closable manner. When the pressure in the cylinder of the compressor is greater than the pressure provided by the valve plate, the refrigerant is discharged through the exhaust hole.

[0025] In some embodiments, the substrate includes a plurality of waist-shaped holes penetrating the substrate and distributed along the circumference of the substrate.

[0026] In some embodiments, the base includes a plurality of threaded holes penetrating the base and distributed along the circumference of the base, and the upper cylinder cover is detachably connected to the cylinder of the compressor through the plurality of threaded holes.

[0027] Another aspect of the present invention provides a compressor, comprising: a cylinder, a lower cylinder head and any one of the above-mentioned silencer components.

[0028] The beneficial effects of the present invention compared with the prior art include at least:

[0029] The silencer assembly and compressor of the present invention add a guide device at the exhaust slope of the upper cylinder head to guide the high-temperature and high-pressure refrigerant coming out of the exhaust port, thereby preventing the high-speed refrigerant from colliding with the inner wall of the muffler, allowing the refrigerant to flow in an orderly manner, thereby reducing the airflow noise of the compressor and reducing the performance loss of the compressor.

[0030] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification are used to explain the principles of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0032] Figure 1 A schematic diagram showing the structure of an upper cylinder cover in one embodiment of the present invention is shown;

[0033] Figure 2 The noise reduction assembly of the present invention is shown in Figure 1 Schematic diagram of the AA section;

[0034] Figure 3 A schematic diagram showing an upper cylinder cover and a flow guide device in an embodiment of the present invention;

[0035] Figure 4 A schematic diagram showing an upper cylinder cover and another flow guide device in one embodiment of the present invention;

[0036] Figure 5 A schematic diagram showing an upper cylinder cover and another flow guide device in one embodiment of the present invention;

[0037] Figure 6 A schematic diagram showing the relationship between three angles of the flow guiding device of the present invention;

[0038] Figure 7 A schematic diagram showing a flow guiding device of the present invention;

[0039] Figure 8 A schematic diagram showing another flow guiding device of the present invention;

[0040] Fig. 9 A schematic diagram showing another flow guiding device of the present invention;

[0041] Fig.10 A schematic diagram showing another flow guiding device of the present invention;

[0042] Fig.11 A schematic diagram showing an upper cylinder cover and another flow guide device in one embodiment of the present invention;

[0043] Fig.12 The acoustic response test diagram in the exhaust chamber of the compressor of the present invention and the prior art is shown.

[0044] Reference numerals:

[0045] 10 Upper cylinder head

[0046] 11. Matrix

[0047] 111 Exhaust ramp

[0048] 112 waist hole

[0049] 113 threaded hole

[0050] 12 Exhaust holes

[0051] 13 Valve seat

[0052] 20 Silencer

[0053] 30. Diversion device

[0054] α First angle

[0055] β Second angle

[0056] γ The third angle DETAILED DESCRIPTION

[0057] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0058] The words "first", "second" and the like used in the specific description do not indicate any order, quantity or importance, but are only used to distinguish different components. In addition, in the description of the present invention, the orientation or position relationship indicated by the terms "upper" and "lower" are based on the orientation or position relationship shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0059] It should be noted that, in the absence of conflict, the embodiments of the present invention and features in different embodiments may be combined with each other.

[0060] The inventor of this case has provided a solution to the problems existing in the prior art through careful and in-depth research. Figure 1 and 2 As shown, Figure 1 A schematic diagram showing the structure of an upper cylinder cover in one embodiment of the present invention is shown; Figure 2 The noise reduction assembly of the present invention is shown in Figure 1 Schematic diagram of the AA section in the figure. The present invention discloses a muffler assembly and a compressor. The muffler assembly is used for a compressor, and specifically comprises: an upper cylinder head 10, the upper cylinder head 10 comprises a base 11 and an exhaust hole 12 penetrating the base 11 along the axial direction of the base 11, and the base 11 has an exhaust slope 111 around the exhaust hole 12; a muffler 20, the muffler 20 comprises a plurality of muffler 20 outlets, the muffler 20 is covered on the upper cylinder head 10, and the space enclosed by the muffler 20 and the upper cylinder head 10 constitutes the muffler 20 cavity; and at least one guide device 30, the guide device 30 is located in the muffler 20 cavity, and is arranged between the exhaust slope 111 and the muffler 20; the guide device 30 is a protruding structure; the refrigerant discharged from the exhaust hole 12 passes through the exhaust slope 111, and changes its flow direction under the action of the guide device 30, and flows out of the muffler 20 from the muffler 20 outlet. The silencer assembly and compressor of the present invention add a guide device 30 at the exhaust slope 111 of the upper cylinder head 10 to guide the high-temperature and high-pressure refrigerant coming out of the exhaust hole 12, thereby preventing the high-speed refrigerant from colliding with the inner wall of the muffler 20, allowing the refrigerant to flow in an orderly manner, thereby reducing the airflow noise of the compressor and reducing the performance loss of the compressor.

[0061] The present invention is further described below in conjunction with the accompanying drawings.

[0062] refer to Figures 1 to 5 as well as Fig.11 , Figure 3 A schematic diagram showing an upper cylinder cover and a flow guide device in an embodiment of the present invention; Figure 4 A schematic diagram showing an upper cylinder cover and another flow guide device in one embodiment of the present invention; Figure 5A schematic diagram showing an upper cylinder cover and another flow guide device in one embodiment of the present invention is shown. Fig.11 A schematic diagram of an upper cylinder head and another flow guide device in an embodiment of the present invention is shown. According to one aspect of the present invention, a muffler assembly is disclosed, which is used for a compressor and specifically comprises at least: an upper cylinder head 10, a muffler 20 and at least one flow guide device 30.

[0063] In some embodiments, the upper cylinder head 10 includes a base 11 and an exhaust hole 12 that penetrates the base 11 along the axial direction of the base 11, and the base 11 has an exhaust slope 111 around the exhaust hole 12. Generally, the base of the upper cylinder head used for the compressor is annular to match the overall shape of the compressor. The exhaust hole 12 is located at a point off-center of the base 11, and the axial direction of the base 11 is also the axial direction of the compressor. The exhaust slope 111 semi-surrounds the exhaust hole 12, and the semi-surrounded position of the exhaust slope 111 completely covers the direction of the refrigerant outflow, so that after the refrigerant flows out of the exhaust hole 12, it is discharged upward through the exhaust slope 111. In addition, the exhaust slope 111 can be a smooth curved surface, or it can be a combination of multiple planes, or other forms.

[0064] In some embodiments, the upper cylinder head 10 further includes a valve seat 13, which is recessed in the axial direction of the base 11. That is, the valve seat 13 is formed by opening a groove on the upper surface of the base 12, and a part of the bottom of the groove is the valve seat 13. The exhaust slope 111 is the inclined inner wall of the groove of the valve seat 13, and the other inner walls of the groove can be parallel to the axial direction of the base 11, or there can be a certain angle, without limitation. The exhaust hole 12 is located in the valve seat 13. In a preferred embodiment, the exhaust hole 12 is inclined toward the outside of the base 11 along the direction from the bottom to the top of the exhaust slope 111, that is, there is a certain angle between the axial direction of the exhaust hole 12 from bottom to top and the axial direction of the base 11. In a more preferred embodiment, the inclination direction of the exhaust hole 12 matches the inclination direction of the exhaust slope 111 to reduce the collision between the refrigerant flow and the base 11 and components such as the muffler 20, so as to reduce power consumption and reduce noise.

[0065] In some embodiments, the upper cylinder head 10 further includes a valve plate (not shown in the figure), which is located on the valve seat 13 and can cover the exhaust hole 12 in an openable and closable manner. Generally, the valve plate is elastic, and one end of the valve plate is detachably arranged on the end of the valve seat 13 away from the exhaust hole, and the other end of the valve plate closes the exhaust hole 12. The valve seat is subjected to the air pressure in the working chamber and the air pressure of the external environment. When the pressure difference is greater than a certain critical value, the end of the valve plate located on the exhaust hole 12 is lifted and opens the exhaust hole 12 to discharge the gas.

[0066] In some embodiments, the base 11 includes a plurality of waist-shaped holes 114 that penetrate the base 11 and are distributed along the circumference of the base 11. The plurality of waist-shaped holes 114 may be of the same shape and size or may be different. The working chamber of the compressor includes an air intake chamber and a compression chamber. During the operation of the compressor, most of the cylinder is immersed in the oil pool. The area of ​​the waist-shaped holes 114 can be filled with the oil pool, which is conducive to the heat dissipation of the high temperature in the compression chamber to the oil pool.

[0067] In some embodiments, the base 11 includes a plurality of threaded holes 115 that penetrate the base 11 and are distributed along the circumference of the base 11, and the upper cylinder head 10 is detachably connected to the cylinder of the compressor through the plurality of threaded holes 115. The threaded holes 115 are closer to the axis of the base 11 than the waist-shaped holes 114. Specifically, the cylinder is also provided with a plurality of threaded holes, and the threaded holes on the cylinder correspond one-to-one to the threaded holes 115 on the base 11, and then the two are detachably connected by bolts.

[0068] In some embodiments, reference Figure 1 and 2 The muffler 20 includes a plurality of muffler outlets (not shown in the figure), which can be opened on the side of the muffler 20 or on the top surface of the muffler 20. The muffler 20 covers the upper cylinder head 10, and the space enclosed by the muffler 20 and the upper cylinder head 10 constitutes a muffler cavity. After the gas is discharged from the exhaust hole 12, it passes through the muffler cavity and is discharged from the muffler outlet. The muffler 20 is used to eliminate the noise generated by the compressor during operation, especially the noise generated when the gas is discharged from the exhaust hole 12.

[0069] refer to Figures 2 to 10 , Figure 6 A schematic diagram showing the relationship between three angles of the flow guiding device of the present invention; Figure 7 A schematic diagram showing a flow guiding device of the present invention; Figure 8 A schematic diagram showing another flow guiding device of the present invention; Fig. 9 A schematic diagram showing another flow guiding device of the present invention; Fig.10 A schematic diagram showing yet another flow guiding device of the present invention.

[0070] In some embodiments, the guide device 30 is located in the muffler cavity, arranged between the exhaust slope 111 and the muffler 20, and guides the gas discharged from the exhaust hole 12. The refrigerant discharged from the exhaust hole 12 passes through the exhaust slope 111, changes its flow direction under the action of the guide device 30, and flows out of the muffler 20 from the muffler outlet.

[0071] like Figures 6 to 10As shown, in some embodiments, the guide device 30 is a sheet structure. Preferably, in the sheet cross section of the guide device 30, the height of the guide device 30 is h, and the bottom width is l, and the two satisfy h / l≧0.15. When the height h and the bottom width l satisfy the above relationship, the noise reduction effect is better.

[0072] In some embodiments, the guide device 30 is fixedly connected to the exhaust slope 111. Preferably, its width gradually decreases in the vertical upward direction along the exhaust slope 111. That is, the guide device 30 is a triangle, a quasi-triangle, a trapezoid or a quasi-trapezoidal shape, and the bottom end of the guide device 30 is located on the exhaust slope 111, and the top end of the guide device 30 is above the bottom end. Optionally, its width does not change in the vertical upward direction along the exhaust slope 111. That is, the guide device 30 is a parallelogram or a quasi-parallelogram.

[0073] In some embodiments, the guide device 30 is fixedly connected to the muffler 20. The width of the guide device 30 gradually increases in the vertically upward direction along the exhaust slope 111. That is, the bottom end of the guide device 30 is located on the muffler 20, and the bottom end of the guide device 30 is above the top end. The optional shape of the guide device 30 is the same as the above embodiment.

[0074] The flow guide device 30 can be manufactured separately and then fixedly connected to the exhaust slope 111 or the muffler 20. In this case, the flow guide device 30 can be made of metal material or non-metal material that has passed the compatibility test. The flow guide device 30 can also be manufactured together with the exhaust slope 111 or the muffler 20, and integrally formed to simplify the manufacturing process. In this case, the flow guide device 30 is made of the same material as the exhaust slope 111 or the muffler 20.

[0075] In some embodiments, the direction of the sheet cross section of the flow guide device 30 is different from the direction of the refrigerant flow, and it plays a guiding role on the refrigerant. The sheet cross section of the flow guide device 30 and the upward direction parallel to the exhaust slope 111 form a first angle α with the direction of the refrigerant flow, and the absolute value range of the first angle α is 0 to 60°. Preferably, the absolute value range of the first angle α is 20° to 40°. The first angle α adopts the above range to better control the flow of the refrigerant, reduce the drag coefficient, and increase the lift coefficient of the refrigerant flow, so that the separation of the refrigerant is delayed, the flow is smoother, the performance loss of the compressor is reduced, and the noise of the refrigerant flow is reduced.

[0076] In some embodiments, the sheet cross section of the flow guide device 30 forms a second angle β with the exhaust slope 111 or the muffler 20, that is, the flow guide device 30 may not be perpendicular to the exhaust slope 111 or the muffler 20. Specifically, the sheet cross section of the flow guide device 30 forms a second angle β with the slope surface of the exhaust slope 111 where the flow guide device 30 is located, or the sheet cross section of the flow guide device 30 forms a second angle β with the plane of the connection of the muffler 20 where the flow guide device 30 is located, and the value range of the second angle β is 45° to 135°. Preferably, the value range of the second angle β is 60° to 80° or 100° to 120°. The second angle β adopts the above range to better control the flow of the refrigerant, reduce the drag coefficient, and increase the lift coefficient of the refrigerant flow, so that the separation of the refrigerant is delayed, the flow is smoother, the performance loss of the compressor is reduced, and the noise of the refrigerant flow is reduced.

[0077] In some embodiments, the tail of the flow guide device 30 has a third angle γ, and the value range of the third angle γ is 30° to 150°. The third angle γ in the above range can better control the flow of the refrigerant, reduce the drag coefficient, and increase the lift coefficient of the refrigerant flow, so that the separation of the refrigerant is delayed, the flow is smoother, the performance loss of the compressor is reduced, and the noise of the refrigerant flow is reduced.

[0078] In some embodiments, the number of guide devices 30 of the silencer assembly may be 1 to 10. When the number of guide devices 30 is greater than 1, these guide devices 30 may be of the same shape or of different shapes. Preferably, at this time, multiple guide devices 30 are of the same shape. In addition, when the number of guide devices 30 is greater than 1, multiple guide devices 30 may be distributed in parallel, and at this time, the first angle α of each guide device 30 is the same, but the second angle β may be the same or different. Preferably, at this time, the first angle α and the second angle β of multiple guide devices 30 are the same. Multiple guide devices 30 may also be distributed in a symmetrical fan-shaped manner. At this time, the first angle α and the second angle β of each guide device 30 may be the same or different. For example, when there are two guide devices 30, the first angle α of the two guide devices 30 may be 20°, but the bottom edges of the two guide devices 30 are symmetrically distributed with respect to the direction of the refrigerant flow, rather than in parallel. Of course, the first angles α of the two flow guide devices 30 may also be different, but the bottom sides of the flow guide devices 30 deviate in opposite directions with respect to the flow direction of the refrigerant. The second angles β of the two flow guide devices 30 may be 60° and 120°, at which time the tops of the two flow guide devices 30 deviate from or approach each other with respect to the flow direction of the refrigerant. The second angles β of the two flow guide devices 30 may also be 60° and 80° or 100° and 120°, at which time the tops of the two flow guide devices 30 deviate toward the same side with respect to the flow direction of the refrigerant. Preferably, at this time, the first angles α of the plurality of flow guide devices 30 are the same, and the second angles β of the two symmetrically distributed flow guide devices 30 are the same or add up to 180°. In some preferred embodiments, the number of flow guide devices 30 provided by the muffler assembly is 2 to 4. When the number of the flow guide devices 30 is 2 to 3, the flow guide devices 30 are arranged in a row, and the plurality of flow guide devices 30 may be distributed in parallel or in a symmetrical fan-shaped distribution. When the number of the guide devices 30 is 4, the guide devices 30 are arranged in two rows, which can be distributed in parallel or in a symmetrical fan-shaped distribution. The specific arrangement can refer to the above content and will not be repeated. The guide device 30 can divide the flow channel of the refrigerant into finer parts, improve the flow of the refrigerant, reduce the regeneration noise, and especially reduce the noise of medium and low frequencies.

[0079] like Fig.11As shown, in some embodiments, the flow guide device 30 is a V-shaped protruding structure, and the refrigerant flows through the flow guide device 30 from the bottom end of the V to the top end. Optionally, the flow guide device 30 of the V-shaped protruding structure can be regarded as being composed of two flow guide devices 30 of sheet-like structures spliced ​​together. At this time, the parameters of the flow guide device 30 of the V-shaped protruding structure can refer to the flow guide device 30 of the sheet-like structure, which will not be repeated here. Preferably, when the flow guide device 30 of the V-shaped protruding structure is fixedly connected to the exhaust slope 111, its cross-sectional area gradually decreases in the vertical upward direction of the exhaust slope 111. When the flow guide device 30 of the V-shaped protruding structure is fixedly connected to the muffler 20, its cross-sectional area gradually decreases in the vertical downward direction of the muffler 20.

[0080] In some other embodiments, the flow guiding device 30 may be crescent-shaped, and the refrigerant flows through the flow guiding device 30 from the thickest end of the crescent to the tip of the crescent.

[0081] Another aspect of the present invention provides a compressor, comprising: a cylinder, a lower cylinder head and the above-mentioned muffler assembly. The upper cylinder head and the lower cylinder head of the muffler assembly are respectively arranged at the two ends of the cylinder along the axial direction of the cylinder to form a compression chamber for compressing refrigerant. The axial direction of the base 11 of the muffler assembly is parallel to the axial direction of the cylinder. The exhaust hole 12 is connected to the compression chamber. Since the compressor includes the muffler assembly as described above. Therefore, the compressor also has the beneficial effects brought by the muffler assembly. Specifically, please refer to Fig.12 , Fig.12 The acoustic response test diagram of the exhaust chamber of the compressor of the present invention and the prior art is shown. The test is obtained by introducing airflow into the compressor, testing the acoustic response of multiple points inside, and summing the results. Compared with the prior art, the compressor of the present invention can reduce the acoustic response in the muffler cavity by adding a flow guide device 30, thereby reducing noise. Those skilled in the art can set other components and structures of the compressor according to the actual prior art, and the specific working principle and other components and structures of the compressor are not described in detail here.

[0082] In summary, the silencer assembly and compressor of the present invention, by adding a guide device at the exhaust slope of the upper cylinder head, guides the high-temperature and high-pressure refrigerant coming out of the exhaust port, thereby preventing the high-speed refrigerant from colliding with the inner wall of the muffler, allowing the refrigerant to flow in an orderly manner, thereby reducing the airflow noise of the compressor and reducing the performance loss of the compressor.

[0083] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A silencer assembly for a compressor, characterized in that: include: An upper cylinder cover, the upper cylinder cover comprises a base body and an exhaust hole penetrating the base body along the axial direction of the base body, and the base body has an exhaust slope around the exhaust hole; a muffler, the muffler comprising a plurality of muffler air outlets, the muffler covering the upper cylinder head, the space enclosed by the muffler and the upper cylinder head constituting a muffler cavity; and At least one flow guide device is located in the muffler cavity and arranged between the exhaust slope and the muffler; the flow guide device is a protruding structure; the refrigerant discharged from the exhaust hole passes through the exhaust slope, changes its flow direction under the action of the flow guide device, and flows out of the muffler from the muffler outlet.

2. The sound-absorbing assembly according to claim 1, characterized in that: The flow guide device is fixedly connected to the exhaust slope.

3. The sound-absorbing assembly according to claim 1, characterized in that: The flow guide device is fixedly connected to the muffler, and its width gradually increases in the vertical upward direction along the exhaust slope.

4. The sound-absorbing assembly according to claim 1, characterized in that: The guide device is a sheet-like protruding structure. In the sheet-like cross section of the guide device, the height of the guide device is h and the bottom width is l, and the two satisfy h / l≧0.

15.

5. The sound-absorbing assembly according to claim 4, characterized in that: The upward direction of the sheet-shaped cross section of the guide device and parallel to the exhaust slope forms a first angle with the incoming flow direction of the refrigerant, and the absolute value range of the first angle is 0 to 60 degrees.

6. The sound-absorbing assembly according to claim 5, characterized in that: The absolute value range of the first angle is 20° to 40°.

7. The sound-absorbing assembly according to claim 4, characterized in that: A second angle is formed between the sheet-shaped cross section of the guide device and the slope surface of the exhaust slope where the guide device is located, and the value range of the second angle is 45° to 135°.

8. The sound-absorbing assembly according to claim 7, characterized in that: The value range of the second angle is 60° to 120°.

9. The sound-absorbing assembly according to claim 4, characterized in that: The tail of the flow guide device has a third angle, and the value range of the third angle is 30° to 150°.

10. The sound-absorbing assembly according to claim 4, characterized in that: The number of the flow guide devices of the muffler assembly is 1 to 10.

11. The sound-absorbing assembly according to claim 10, characterized in that: When the number of the guide devices is greater than one, the guide devices are distributed in a symmetrical fan shape.

12. The sound-absorbing assembly according to claim 10, characterized in that: The number of flow guide devices of the muffler assembly is 2 to 4; When the number of the flow guiding devices is 2 to 3, the flow guiding devices are arranged in a row; When the number of the guide devices is 4, the guide devices are arranged in two rows.

13. The sound-absorbing assembly according to claim 1, characterized in that: The flow guide device is a V-shaped protruding structure, and the refrigerant flows through the flow guide device from the bottom end to the top end of the V.

14. The sound-absorbing assembly according to claim 1, characterized in that: The upper cylinder cover also includes a valve seat, which is recessed in the base along the axial direction of the base, and the exhaust hole is located in the valve seat. The exhaust hole is inclined toward the outside of the base along the exhaust slope from the bottom end to the top end.

15. The sound-absorbing assembly according to claim 14, characterized in that: The upper cylinder cover also includes a valve plate, which is located on the valve seat. The valve plate can cover the exhaust hole in an openable and closable manner. When the pressure in the cylinder of the compressor is greater than the pressure provided by the valve plate, the refrigerant is discharged through the exhaust hole.

16. The sound-absorbing assembly according to claim 1, characterized in that: The base body includes a plurality of waist-shaped holes penetrating the base body and distributed along the circumference of the base body.

17. The sound attenuation assembly according to claim 1, characterized in that: The base body comprises a plurality of threaded holes penetrating the base body and distributed along the circumference of the base body, and the upper cylinder cover is detachably connected to the cylinder of the compressor through the plurality of threaded holes.

18. A compressor, characterized in that: include: A cylinder, a lower cylinder head and a silencer assembly according to any one of claims 1 to 17.

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