Silencing assembly and compressor

Abstract

The present application relates to the compressor silencing field, provide a kind of silencing assembly and compressor, silencing assembly includes: a upper cylinder cover, the upper cylinder cover includes base body and exhaust hole along the axial direction of base body and through base body, base body around exhaust hole has a exhaust ramp;A silencer, the silencer includes several silencer gas outlet, silencer is covered on the upper cylinder cover, the space surrounded by silencer and upper cylinder cover constitutes silencer cavity;And at least one flow guide device, flow guide device is located in silencer cavity, and is arranged between exhaust ramp and silencer;Flow guide device is convex structure;The refrigerant discharged from exhaust hole passes through exhaust ramp, changes flow direction under the action of flow guide device, flows out from silencer gas outlet from silencer.The silencing assembly and compressor of the present application, by increasing flow guide device, the high-temperature high-pressure refrigerant from exhaust port is guided, to reduce the airflow noise of compressor, reduce the performance loss of compressor.

Description

Technical Field

[0001] This invention relates to the field of compressor noise reduction, and more specifically, to a noise reduction assembly and a compressor. Background Technology

[0002] The working cycle of a rotary compressor can be divided into three processes: intake, compression, and exhaust. Airflow noise is a significant noise source for rotary compressors. During the exhaust process, high-temperature, high-pressure refrigerant enters the muffler from the cylinder through the exhaust port. Because the muffler has a small volume and abrupt changes in area, the airflow impacts the walls, causing internal turbulence, resulting in performance loss and significant airflow noise.

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

[0004] In view of this, the present invention provides a noise reduction component and a compressor.

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

[0006] An upper cylinder head, the upper cylinder head including a base and an exhaust port that extends through the base along the axial direction of the base, the base having an exhaust ramp around the exhaust port;

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

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

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

[0010] In some embodiments, the flow guiding device is fixedly connected to the muffler, and its width gradually increases in the direction perpendicular to the upward direction of the exhaust ramp.

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

[0012] In some embodiments, the direction of the flow guide device through the sheet-like cross-section and parallel to the upward direction of the exhaust ramp forms a first angle with the direction of refrigerant flow, and the absolute value of the first angle ranges from 0 to 60°.

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

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

[0015] In some embodiments, the numerical range of the second included angle is 60° to 120°.

[0016] In some embodiments, the tail of the flow guiding device has a third included angle, the value of which ranges from 30° to 150°.

[0017] In some embodiments, the silencing assembly has 1 to 10 flow guiding devices.

[0018] In some embodiments, when the number of the flow guiding devices is greater than one, the flow guiding devices are arranged in a symmetrical fan-shaped distribution.

[0019] In some embodiments, the noise reduction assembly has 2 to 4 flow guiding devices;

[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 flow guiding devices is 4, the flow guiding devices are arranged in two rows.

[0022] In some embodiments, the flow guiding device is a V-shaped protruding structure, and the refrigerant flows through the flow guiding 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, and the exhaust port is located in the valve seat, the exhaust port being inclined outward from the base along the exhaust ramp from the bottom end to the top end.

[0024] In some embodiments, the upper cylinder head further includes a valve plate located on the valve seat, the valve plate being able to open and close cover the exhaust port, and when the cylinder pressure of the compressor is greater than the pressure provided by the valve plate, the refrigerant is discharged through the exhaust port.

[0025] In some embodiments, the substrate includes a plurality of waist-shaped holes that penetrate the substrate and are distributed circumferentially along the substrate.

[0026] In some embodiments, the base includes a plurality of threaded holes that penetrate the base and are distributed circumferentially along the base, and the upper cylinder head 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 a muffler assembly as described in any of the preceding claims.

[0028] The beneficial effects of this invention compared to the prior art include at least the following:

[0029] The silencing assembly and compressor of the present invention, by adding a flow guiding device at the exhaust ramp of the upper cylinder head, guide the high-temperature and high-pressure refrigerant coming out of the exhaust port, thereby avoiding the high-speed refrigerant from impacting the inner wall of the muffler, so that the refrigerant flows in an orderly manner, thereby reducing the airflow noise of the compressor and reducing the performance loss of the compressor.

[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0032] Figure 1 This diagram shows a structural schematic of the upper cylinder head in one embodiment of the present invention;

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

[0034] Figure 3 This diagram shows an upper cylinder head and a flow guiding device in one embodiment of the present invention;

[0035] Figure 4 This diagram shows an upper cylinder head and another flow guiding device in one embodiment of the present invention;

[0036] Figure 5 This diagram shows an upper cylinder head and another type of flow guiding device in one embodiment of the present invention;

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

[0038] Figure 7 A schematic diagram of a flow guiding device according to the present invention is shown;

[0039] Figure 8 A schematic diagram of another flow guiding device according to the present invention is shown;

[0040] Figure 9 A schematic diagram of another flow guiding device according to the present invention is shown;

[0041] Figure 10 A schematic diagram of another flow guiding device according to the present invention is shown;

[0042] Figure 11 This diagram shows an upper cylinder head and another type of flow guiding device in one embodiment of the present invention;

[0043] Figure 12 The diagram shows the acoustic response test results of the compressor in the exhaust chamber of the present invention and the prior art.

[0044] Figure label:

[0045] 10. Upper cylinder head

[0046] 11 Matrix

[0047] 111 Exhaust ramp

[0048] 112 Waist-shaped hole

[0049] 113 Threaded hole

[0050] 12 Exhaust ports

[0051] 13 Valve seat

[0052] 20 silencers

[0053] 30. Flow guiding device

[0054] α First included angle

[0055] β Second included angle

[0056] γ third angle Detailed Implementation

[0057] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0058] The use of terms such as "first," "second," and similar terms in the specific description does not indicate any order, quantity, or importance, but is merely used to distinguish different components. Furthermore, in the description of this invention, terms such as "upper," "lower," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention.

[0059] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features in different embodiments can be combined with each other.

[0060] Through meticulous and in-depth research, the inventors in this case have provided a solution to the problems existing in the prior art. For example... Figure 1 and 2 As shown, Figure 1 This diagram shows a structural schematic of the upper cylinder head in one embodiment of the present invention; Figure 2 The noise reduction assembly of the present invention is shown in Figure 1 A schematic diagram of section AA. This invention discloses a muffler assembly and a compressor. The muffler assembly, used in the compressor, specifically includes: an upper cylinder head 10, comprising a base 11 and an exhaust port 12 extending axially through the base 11; an exhaust ramp 111 surrounding the exhaust port 12; a muffler 20, comprising a plurality of muffler outlets, the muffler 20 covering the upper cylinder head 10, the space formed by the muffler 20 and the upper cylinder head 10 constituting a muffler 20 cavity; and at least one flow guiding device 30, located within the muffler 20 cavity and arranged between the exhaust ramp 111 and the muffler 20; the flow guiding device 30 is a protruding structure; refrigerant discharged from the exhaust port 12 passes through the exhaust ramp 111, changes its flow direction under the action of the flow guiding device 30, and flows out of the muffler 20 from the exhaust port. The silencing assembly and compressor of the present invention, by adding a flow guiding device 30 at the exhaust ramp 111 of the upper cylinder head 10, guides the high-temperature and high-pressure refrigerant coming out of the exhaust port 12, thereby preventing the high-speed refrigerant from impacting the inner wall of the muffler 20, so that the refrigerant flows in an orderly manner, thereby reducing the airflow noise of the compressor and reducing the performance loss of the compressor.

[0061] The present invention will be further described below with reference to the accompanying drawings.

[0062] refer to Figures 1 to 5 as well as Figure 11 , Figure 3 This diagram shows an upper cylinder head and a flow guiding device in one embodiment of the present invention; Figure 4 This diagram shows an upper cylinder head and another flow guiding device in one embodiment of the present invention; Figure 5This diagram shows an upper cylinder head and a flow guiding device in one embodiment of the present invention. Figure 11 The diagram shows an upper cylinder head and another flow guiding device in one embodiment of the present invention. According to one aspect of the present invention, a muffler assembly for a compressor is disclosed, specifically comprising at least: an upper cylinder head 10, a muffler 20, and at least one flow guiding device 30.

[0063] In some embodiments, the upper cylinder head 10 includes a base 11 and an exhaust port 12 extending through the base 11 along its axial direction. The base 11 has an exhaust ramp 111 surrounding the exhaust port 12. Generally, the base of the upper cylinder head used in compressors is annular to match the overall shape of the compressor. The exhaust port 12 is located off-center from the base 11, and the axial direction of the base 11 is also the axial direction of the compressor. The exhaust ramp 111 partially surrounds the exhaust port 12, and the semi-enclosed position of the exhaust ramp 111 completely covers the direction of refrigerant flow, so that after the refrigerant flows out of the exhaust port 12, it is discharged upward through the exhaust ramp 111. Furthermore, the exhaust ramp 111 can be a smooth curved surface, or it can be composed of multiple planes joined together, or other forms.

[0064] In some embodiments, the upper cylinder head 10 further includes a valve seat 13, which is recessed into the base 11 along its axial direction. That is, the valve seat 13 is formed by creating a groove on the upper surface of the base 12, with a portion of the bottom of the groove serving as the valve seat 13. The exhaust ramp 111 is the inclined inner wall of the groove in the valve seat 13. Other inner walls of the groove can be parallel to the axial direction of the base 11 or have a certain angle, without limitation. The exhaust port 12 is located in the valve seat 13. In a preferred embodiment, the exhaust port 12 is inclined outward from the base 11 along the exhaust ramp 111 from bottom to top, meaning that the upward axial direction of the exhaust port 12 has a certain angle with the axial direction of the base 11. In a more preferred embodiment, the inclination direction of the exhaust port 12 matches the inclination direction of the exhaust ramp 111 to reduce collisions between the refrigerant and components such as the base 11 and the muffler 20, thereby reducing power consumption and noise.

[0065] In some embodiments, the upper cylinder head 10 further includes a valve plate (not shown) located on the valve seat 13, which can be opened and closed to cover the exhaust port 12. Generally, the valve plate is elastic, with one end detachably disposed on the end of the valve seat 13 away from the exhaust port, and the other end of the valve plate closing the exhaust port 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 port 12 tilts up and opens the exhaust port 12, allowing gas to be discharged.

[0066] In some embodiments, the substrate 11 includes a plurality of oblong holes 114 that penetrate the substrate 11 and are distributed circumferentially along the substrate 11. The plurality of oblong holes 114 may be the same in shape and size or may be different. The working chamber of the compressor includes an intake chamber and a compression chamber. During the operation of the compressor, most of the cylinder is immersed in the oil sump. The area of ​​the oblong holes 114 can fill the oil sump, which is beneficial for the high temperature in the compression chamber to dissipate heat to the oil sump.

[0067] In some embodiments, the base 11 includes a plurality of threaded holes 115 penetrating the base 11 and distributed circumferentially along the base 11. The upper cylinder head 10 is detachably connected to the compressor cylinder through the plurality of threaded holes 115. The threaded holes 115 are closer to the axis of the base 11 than the oblong holes 114. Specifically, the cylinder is also provided with a plurality of threaded holes, the threaded holes on the cylinder corresponding one-to-one with 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 several muffler outlets (not shown in the figure), which can be located on the side or top 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 the muffler cavity. After the gas is discharged from the exhaust port 12, it passes through the muffler cavity and exits from the muffler outlets. The muffler 20 is used to eliminate the noise generated by the compressor during operation, especially the noise generated when gas is discharged from the exhaust port 12.

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

[0070] In some embodiments, the flow guiding device 30 is located within the muffler cavity and arranged between the exhaust ramp 111 and the muffler 20 to guide the gas discharged from the exhaust port 12. The refrigerant discharged from the exhaust port 12 passes through the exhaust ramp 111, and its flow direction is changed by the flow guiding device 30, flowing out of the muffler 20 from the muffler outlet.

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

[0072] In some embodiments, the flow guide 30 is fixedly connected to the exhaust ramp 111. Preferably, its width gradually decreases along the vertical upward direction of the exhaust ramp 111. That is, the flow guide 30 is triangular, triangular-like, trapezoidal, or trapezoidal, etc., and the bottom end of the flow guide 30 is located on the exhaust ramp 111, while the top end of the flow guide 30 is above the bottom end. Optionally, its width remains constant along the vertical upward direction of the exhaust ramp 111. That is, the flow guide 30 is parallelogram or parallelogram-like, etc.

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

[0074] The flow guide device 30 can be manufactured separately and then fixedly connected to the exhaust ramp 111 or the muffler 20. In this case, the flow guide device 30 can be made of metal or non-metallic materials that have passed compatibility testing. Alternatively, the flow guide device 30 can be manufactured together with the exhaust ramp 111 or the muffler 20, forming a single piece to simplify the manufacturing process. In this case, the flow guide device 30 and the exhaust ramp 111 or the muffler 20 are made of the same material.

[0075] In some embodiments, the direction of the sheet-like cross-section of the flow guiding device 30 is different from the direction of refrigerant flow, and it guides the refrigerant flow. A first angle α is formed between the sheet-like cross-section of the flow guiding device 30 and the direction parallel to the upward direction of the exhaust ramp 111, and the direction of refrigerant flow. The absolute value of the first angle α ranges from 0 to 60°. Preferably, the absolute value of the first angle α ranges from 20° to 40°. Using the above-mentioned range for the first angle α allows for better control of the refrigerant flow, reduces the drag coefficient, increases the lift coefficient of the refrigerant flow, delays refrigerant separation, makes the flow smoother, reduces compressor performance loss, and lowers refrigerant flow noise.

[0076] In some embodiments, the sheet-like cross-section of the flow guide 30 forms a second included angle β with the exhaust ramp 111 or the muffler 20, meaning the flow guide 30 may not be perpendicular to the exhaust ramp 111 or the muffler 20. Specifically, the second included angle β is formed between the sheet-like cross-section of the flow guide 30 and the slope surface of the exhaust ramp 111 where the flow guide 30 is located, or between the sheet-like cross-section of the flow guide 30 and the plane at the connection point of the flow guide 30 with the muffler 20. The value range of the second included angle β is 45° to 135°. Preferably, the value range of the second included angle β is 60° to 80° or 100° to 120°. Using the above range for the second included angle β allows for better control of the refrigerant flow, reduces the drag coefficient, increases the lift coefficient of the refrigerant flow, delays refrigerant separation, makes the flow smoother, reduces compressor performance loss, and reduces refrigerant flow noise.

[0077] In some embodiments, the tail of the flow guiding device 30 has a third included angle γ, the value of which ranges from 30° to 150°. Using the above-mentioned range for the third included angle γ allows for better control of the refrigerant flow, reduces the drag coefficient, increases the lift coefficient of the refrigerant flow, delays refrigerant separation, makes the flow smoother, reduces compressor performance loss, and lowers refrigerant flow noise.

[0078] In some embodiments, the number of flow guiding devices 30 in the silencing assembly can be 1 to 10. When the number of flow guiding devices 30 is greater than one, these flow guiding devices 30 can be of the same shape or different shapes. Preferably, in this case, the multiple flow guiding devices 30 are of the same shape. Furthermore, when the number of flow guiding devices 30 is greater than one, the multiple flow guiding devices 30 can be arranged in parallel. In this case, the first included angle α of each flow guiding device 30 is the same, but the second included angle β can be the same or different. Preferably, in this case, the first included angle α and the second included angle β of the multiple flow guiding devices 30 are the same. The multiple flow guiding devices 30 can also be arranged in a symmetrical fan-shaped distribution. In this case, the first included angle α and the second included angle β of each flow guiding device 30 can be the same or different. For example, when there are two flow guiding devices 30, the first included angle α of both flow guiding devices 30 can be 20°, but the bottom edges of the two flow guiding devices 30 are symmetrically distributed with respect to the direction of refrigerant flow, rather than parallelly distributed. Of course, the first included angle α of the two flow guiding devices 30 can also be different, but the bottom edge of the flow guiding device 30 is deviated in opposite directions with respect to the refrigerant flow direction. The second included angle β of the two flow guiding devices 30 can be 60° and 120°, in which case the top edges of the two flow guiding devices 30 are either opposite or close with respect to the refrigerant flow direction. The second included angle β of the two flow guiding devices 30 can also be 60° and 80° or 100° and 120°, in which case the top edges of the two flow guiding devices 30 are offset to the same side with respect to the refrigerant flow direction. Preferably, the first included angle α of the multiple flow guiding devices 30 is the same, and the second included angle β of the two symmetrically distributed flow guiding devices 30 is the same or adds up to 180°. In some preferred embodiments, the silencing assembly has 2 to 4 flow guiding devices 30. When the number of flow guiding devices 30 is 2 to 3, the flow guiding devices 30 are arranged in a row, and the multiple flow guiding devices 30 can be distributed in parallel or in a symmetrical fan-shaped distribution. When there are four flow guiding devices 30, they are arranged in two rows, which can be parallel or symmetrically fan-shaped. The specific arrangement is described above and will not be repeated here. The flow guiding devices 30 can further divide the refrigerant flow path, improve refrigerant flow, and reduce regeneration noise, especially low- and mid-frequency noise.

[0079] like Figure 11As shown, in some embodiments, the flow guiding device 30 has a V-shaped protruding structure, and the refrigerant flows through the flow guiding device 30 from the bottom to the top of the V. Optionally, the V-shaped protruding flow guiding device 30 can be considered as being formed by splicing two sheet-like flow guiding devices 30. In this case, the parameters of the V-shaped protruding flow guiding device 30 can be referred to the sheet-like flow guiding device 30, which will not be repeated here. Preferably, when the V-shaped protruding flow guiding device 30 is fixedly connected to the exhaust ramp 111, its cross-sectional area gradually decreases in the direction vertically upward along the exhaust ramp 111. When the V-shaped protruding flow guiding device 30 is fixedly connected to the muffler 20, its cross-sectional area gradually decreases in the direction vertically downward along the muffler 20.

[0080] In some other embodiments, the flow guiding device 30 can 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 aforementioned muffler assembly. The upper and lower cylinder heads of the muffler assembly are respectively disposed at both ends of the cylinder along the axial direction of the cylinder, forming 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. An exhaust port 12 communicates with the compression chamber. Since the compressor includes the muffler assembly as described above, the compressor also has the beneficial effects brought by the muffler assembly. Specifically, see [link to relevant documentation]. Figure 12 , Figure 12 The diagram shows the acoustic response test results within the exhaust chamber of the compressor of the present invention and the prior art. This test involves introducing airflow into the compressor and testing the acoustic response at multiple points inside, then summing the results. Compared to the prior art, the compressor of the present invention, by adding the airflow guiding device 30, can reduce the acoustic response within the muffler cavity, thereby reducing noise. Those skilled in the art can modify other components and structures of the compressor according to actual prior art; the specific working principle of the compressor and other components and structures are not described in detail here.

[0082] In summary, the muffler assembly and compressor of the present invention, by adding a flow guiding device at the exhaust ramp of the upper cylinder head, guide the high-temperature and high-pressure refrigerant coming out of the exhaust port, thereby preventing the high-speed refrigerant from impacting the inner wall of the muffler, so that the refrigerant flows in an orderly manner, thereby reducing the airflow noise of the compressor and reducing the performance loss of the compressor.

[0083] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A sound attenuation assembly for a compressor, comprising: include: An upper cylinder head, the upper cylinder head including a base and an exhaust port that extends through the base along the axial direction of the base, the base having an exhaust ramp around the exhaust port; A muffler, comprising a plurality of muffler outlets, the muffler covering the upper cylinder head, the space enclosed by the muffler and the upper cylinder head forming a muffler cavity; and At least one flow guiding device is located within the muffler cavity and arranged between the exhaust ramp and the muffler; the flow guiding device is disposed on the slope of the exhaust ramp; the flow guiding device has a protruding structure; the refrigerant discharged from the exhaust port passes through the exhaust ramp and changes its flow direction under the action of the flow guiding device, avoiding the refrigerant from impacting the inner wall of the muffler, so that the refrigerant flows in an orderly manner and flows out of the muffler from the exhaust port.

2. The sound attenuation assembly of claim 1, wherein, The flow guiding device is fixedly connected to the exhaust ramp.

3. The sound attenuation assembly of claim 1, wherein, The flow guiding device is a sheet-like protruding structure. In the sheet-like cross-section of the flow guiding device, the height of the flow guiding device is h and the bottom width is l, and the two satisfy h / l≧0.

15.

4. The sound attenuation assembly of claim 3, wherein, The flow path passes through the sheet-like cross-section of the flow guide device and forms a first angle with the direction of refrigerant flow in the direction parallel to the upward direction of the exhaust slope. The absolute value of the first angle ranges from 0 to 60°.

5. The sound attenuation assembly of claim 4, wherein, The absolute value of the first included angle ranges from 20° to 40°.

6. The sound attenuation assembly of claim 3, wherein, The sheet-like cross-section of the flow guiding device forms a second angle with the slope of the exhaust ramp where the flow guiding device is located, and the value of the second angle ranges from 45° to 135°.

7. The sound attenuation assembly of claim 6, wherein, The second included angle has a numerical range of 60° to 120°.

8. The sound attenuation assembly of claim 3, wherein, The tail of the flow guiding device has a third included angle, the value of which is in the range of 30° to 150°.

9. The sound attenuation assembly of claim 3, wherein, The number of flow guiding devices in the noise reduction assembly is 1 to 10.

10. The sound attenuation assembly of claim 9, wherein, When the number of the flow guiding devices is greater than one, the flow guiding devices are distributed in a symmetrical fan shape.

11. The sound attenuation assembly of claim 9, wherein, The noise reduction assembly has 2 to 4 flow guiding devices; 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 flow guiding devices is 4, the flow guiding devices are arranged in two rows.

12. The sound attenuation assembly of claim 1, wherein, The flow guiding device has a V-shaped protruding structure, and the refrigerant flows through the flow guiding device from the bottom end to the top end of the V.

13. The sound attenuation assembly of claim 1, wherein, The upper cylinder head also includes a valve seat, which is recessed in the base along the axial direction of the base. The exhaust port is located in the valve seat and is inclined outward from the base along the exhaust ramp from the bottom to the top.

14. The sound attenuation assembly of claim 13, wherein, The upper cylinder head also includes a valve plate located on the valve seat. The valve plate can be opened and closed to cover the exhaust port. When the cylinder pressure of the compressor is greater than the pressure provided by the valve plate, the refrigerant is discharged through the exhaust port.

15. The sound attenuation assembly of claim 1, wherein, The substrate includes a plurality of waist-shaped holes that penetrate the substrate and are distributed circumferentially along the substrate.

16. The sound attenuation assembly of claim 1, wherein, The base includes a plurality of threaded holes that penetrate the base and are distributed circumferentially along the base, and the upper cylinder head is detachably connected to the cylinder of the compressor through the plurality of threaded holes.

17. A compressor characterized by, include: Cylinder, lower cylinder head, and muffler assembly according to any one of claims 1 to 16.

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