Silencer and compressor

Abstract

The invention provides a silencer and a compressor. The silencer comprises a cavity-shaped part, the cavity-shaped part comprises a cover plate and a side wall arranged on one side of the cover plate, the side wall is arranged in the circumferential direction of the cover plate, and at least one exhaust cavity is defined by the cover plate and the side wall; the at least one drainage part is arranged on the side, close to the side wall, of the cover plate, and the drainage part extends in the direction away from the cover plate and does not make contact with the side wall; and one end of at least one drainage part points to the shaft hole direction of the cover plate and is used for guiding airflow to orderly flow to an exhaust chamber of the silencer for exhausting. According to the silencer, the drainage part is arranged on the cover plate of the silencer, the drainage part guides airflow passing through the two sides of the drainage part to orderly flow towards the exhaust cavity of the silencer, the energy loss of the ordered airflow is small, airflow pulsation is reduced, then the pressure loss of the airflow can be reduced, noise generated by airflow pulsation is reduced, and the service life of the silencer is prolonged. And the noise reduction effect of the silencer is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and particularly to a silencer and a compressor. Background Art

[0002] With the development of society and the improvement of residents' living standards, people pay more and more attention to the noise of household appliances, and noise has also become an important indicator for measuring the quality of compressors in refrigeration equipment such as refrigerators. The noise of refrigeration equipment is mainly caused by the refrigeration compressor, and the noise of the compressor mainly consists of three parts: air flow pulsation noise, mechanical noise, and electromagnetic noise. Among them, the air flow pulsation noise accounts for the largest proportion and is the main noise source of the compressor.

[0003] During the operation of the compressor, high-speed air flow is intermittently discharged. When the air flow is discharged from the exhaust hole of the cylinder, it will cause pressure pulsation, resulting in noise of the compressor. Currently, the main noise reduction method is to use a silencer. The noise reduction process of the silencer is as follows: the valve plate on the compressor is periodically opened, the refrigerant air flow is discharged from the cylinder, and then flows into the cavity of the silencer to achieve noise reduction. The existing noise reduction structure is that the air flow enters the silencer from the air outlet at the upper end of the flange, and then is discharged into the compressor housing through the exhaust hole at the upper end of the silencer. However, most current silencers reduce noise by increasing the number of noise reduction cavities or forming an internal Helmholtz resonance cavity, that is, reducing noise based on the principle of reactive noise reduction. This will increase the pressure loss of the refrigerant air flow and lack the suppression of the regenerative noise of the silencer. Summary of the Invention

[0004] Aiming at the problems in the prior art, the purpose of the present invention is to provide a silencer and a compressor. A diversion part is provided in the silencer as a diversion structure to guide the air flow to flow orderly, so as to reduce the pressure loss of the air flow and the noise generated by air flow pulsation, and improve the noise reduction effect of the silencer.

[0005] An embodiment of the present invention provides a silencer for use in a compressor, including:

[0006] A cavity part, including a cover plate and a side wall provided on one side of the cover plate. The side wall is arranged along the circumferential direction of the cover plate, and the cover plate and the side wall enclose at least one exhaust cavity;

[0007] At least one diversion part is provided on the side of the cover plate close to the side wall. The diversion part extends in a direction away from the cover plate and does not contact the side wall; one end of at least one of the diversion parts points to the direction of the shaft hole of the cover plate for guiding the air flow to exhaust into the exhaust cavity of the silencer.

[0008] In some embodiments, the height of the diversion part is not higher than 0.8 times the height of the side wall.

[0009] In some embodiments, the side wall includes a recessed portion that is concave toward the shaft hole, and a narrow channel is formed between the recessed portion and the shaft hole. The drainage portion guides the air flow through the narrow channel into the exhaust chamber for exhaust.

[0010] In some embodiments, each of the drainage portions includes an arc-shaped sheet structure.

[0011] In some embodiments, the included angle between the tangent line on the side of the arc-shaped sheet structure close to the shaft hole and the mid-perpendicular plane of the narrow channel closest to it ranges from -60° to 60°.

[0012] In some embodiments, each of the drainage portions includes a first arc-shaped sheet structure and a second arc-shaped sheet structure, and the concave surfaces of the first arc-shaped sheet structure and the second arc-shaped sheet structure face in opposite directions.

[0013] In some embodiments, a shaft hole is provided at the center of the cover plate. The cover plate includes a plurality of petal-shaped structures that are evenly distributed circumferentially around the shaft hole. The cover plate and the side wall enclose a plurality of connected petal-shaped chambers. At least one exhaust hole is provided in one of the chambers, and the drainage portion is provided in at least one of the chambers without the exhaust hole.

[0014] In some embodiments, the drainage portion is an arc-shaped three-dimensional structure, and the width of the side of the drainage portion facing away from the cover plate is smaller than the width of the side of the drainage portion close to the cover plate.

[0015] In some embodiments, the included angle between the tangent line on the side of the arc-shaped three-dimensional structure close to the shaft hole and the mid-perpendicular plane of the narrow channel closest to it ranges from -60° to 60°.

[0016] An embodiment of the present invention further provides a compressor, including a flange installed on a cylinder and the silencer as described above. The silencer is provided on the flange and is communicated with the outlet of the flange.

[0017] An embodiment of the present invention further provides a compressor, including a flange installed on a cylinder and the silencer as described above. The silencer is provided on the flange and is communicated with the outlet of the flange.

[0018] The silencer and the compressor provided by the present invention have the following advantages:

[0019] By providing a drainage portion on the cover plate of the silencer, the drainage portion guides the air flow on both sides of it to flow orderly toward the exhaust chamber of the silencer. The energy loss of the orderly air flow is small and the air flow pulsation is reduced. Furthermore, the pressure loss of the air flow can be reduced, the noise generated by the air flow pulsation can be reduced, and the noise reduction effect of the silencer can be improved. Description of the Drawings

[0020] Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0021] Figure 1 is a schematic diagram of a muffler provided by one embodiment of the present invention;

[0022] Figure 2 Is equipped with Figure 1 A partial top view of the compressor with a muffler;

[0023] Figure 3 is a schematic diagram of a muffler provided by another embodiment of the present invention;

[0024] Figure 4 The compressor is provided with a conventional muffler, Figure 1 The compressor and the silencer settings shown Figure 3 The noise comparison chart of the compressor when the muffler is running is shown;

[0025] Figure 5 The compressor is provided with a conventional muffler, Figure 1 The compressor and the silencer settings shown Figure 3 The comparison diagram of the exhaust pressure loss of the compressor with the muffler is shown.

[0026] Reference numerals:

[0027] 10 Cavity Department

[0028] 11 Cover

[0029] 111 shaft hole

[0030] 112 exhaust vent

[0031] 12 Sidewall

[0032] 121 Depression

[0033] 20 Drainage

[0034] 21 First curved sheet structure

[0035] 22 Second curved sheet structure

[0036] 30 Installation

[0037] 31 mounting holes DETAILED DESCRIPTION

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures and thus their repetitive description will be omitted.

[0039] In the description of this application, the references to the expressions such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics represented in connection with the embodiment or example are included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics represented can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples represented in this application and the features of different embodiments or examples.

[0040] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically and clearly defined.

[0041] It should be further understood that the terms "comprising" and "including" indicate the presence of the features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or meaning any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C". An exception to this definition occurs only when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0042] To solve the problems in the prior art, an embodiment of the present invention provides a muffler for a compressor. Figure 1 is a schematic diagram of the muffler provided by an embodiment of the present invention; Figure 2 is provided with Figure 1 of the muffler of the compressor partial top view. As Figure 1 and Figure 2As shown, the compressor includes a cavity portion 10 and at least one air guiding portion 20. Specifically, the cavity portion 10 includes a cover plate 11 and a side wall 12 provided on one side of the cover plate 11. The side wall 12 is arranged along the circumferential direction of the cover plate 11. The cover plate 11 and the side wall 12 enclose at least one exhaust chamber. The air guiding portion 20 is provided on the side of the cover plate 11 close to the side wall 12. The air guiding portion 20 extends in a direction away from the cover plate 11 and does not contact the side wall 12. One end of the air guiding portion 20 points in the direction of the shaft hole 111 of the cover plate 11, and is used to guide the air flow to flow orderly into the exhaust chamber of the muffler for exhausting.

[0043] Before explaining the beneficial effects of the muffler provided by the embodiments of the present invention, a further introduction to the overall structure of the muffler is made. Refer to Figure 1 and Figure 2 , a shaft hole 111 is provided at the center of the cover plate 11. The cover plate 11 includes a plurality of petal-shaped structures evenly distributed in the circumferential direction around the shaft hole 111. The cover plate 11 and the side wall 12 enclose a plurality of connected petal-shaped chambers. At least one exhaust hole 112 is provided in at least one chamber, and an air guiding portion 20 is provided in at least one chamber without an exhaust hole 112. Exemplarily, in this embodiment, the cover plate 11 includes four petal-shaped structures evenly distributed in the circumferential direction around the shaft hole 111. Therefore, the cover plate 11 and the side wall 12 enclose four connected petal-shaped chambers. Among them, exhaust holes 112 are provided in two relatively arranged chambers, and the chambers with exhaust holes 112 are exhaust chambers. In the other two relatively arranged chambers, there are no exhaust holes 112, but air guiding portions 20 are provided inside the chambers. The air guiding portion 20 is used to direct the disordered air flow entering the chamber where the air guiding portion 20 is located in an orderly manner, so that the air flow flows orderly into the chamber with an exhaust hole 112, and finally is discharged outside the muffler through the exhaust hole 112. It should be noted that the structure of the muffler is not limited to the structure shown in the drawings. For example, the muffler may include only one chamber, or connected petal-shaped chambers such as two, three, five, etc. The number of exhaust holes 112 is not limited to the two shown above, and the position of the exhaust holes 112 is also not limited to the position shown above. The number, shape of the petal-shaped chambers of the muffler, and the position and number of the exhaust holes 112 can be set according to actual needs.

[0044] Furthermore, please refer to Figure 2 , the side wall 12 includes a concave portion 121 that is concave inward in the direction close to the shaft hole 111. A narrow channel is formed between the concave portion 121 and the shaft hole 111. The air guiding portion 20 guides the air flow to enter the exhaust chamber through the narrow channel (as shown in Figure 2The air is exhausted in the direction of the arrow shown in the figure. When the muffler is arranged on the flange of the compressor cylinder, the bearing on the crankshaft is provided at the shaft hole 111. When the airflow enters the interior of the cavity portion 10, part of the airflow enters the chamber where the guide portion 20 is located. Since one end of the guide portion 20 points to the position where the shaft hole 111 is located, the guide portion 20 will guide the airflow to flow in an orderly manner in the direction of the shaft hole 111, and then flow to the slit between the side wall 12 of the muffler and the bearing, and further flow to the exhaust chamber where the exhaust hole 112 is located, and finally the airflow is discharged from the exhaust hole 112. The energy loss of the ordered airflow is small, thereby reducing the pressure loss of the airflow, and the airflow pulsation of the ordered airflow is reduced, thereby reducing the noise generated by the airflow pulsation. Therefore, by arranging the guide portion 20 inside the cavity portion 10 and guiding the disordered airflow to flow in an orderly manner into the exhaust chamber, the pressure loss of the airflow can be reduced, the airflow pulsation can be reduced, the noise can be reduced, and the noise reduction effect of the muffler can be improved.

[0045] Furthermore, the height of the drainage portion 20 is no greater than 0.8 times the height of the sidewall 12. If the drainage portion 20 is too high, it can easily cause poor airflow within the muffler, making exhaust difficult. If the drainage portion 20 is too low, it can hinder the orderly flow of air within the cavity 10, reducing the noise reduction effect of the muffler. By properly setting the height of the drainage portion 20, the airflow is guided to flow orderly into the exhaust cavity for exhaust, thereby improving the noise reduction effect of the muffler.

[0046] Furthermore, if Figure 1 and Figure 2 As shown, in this embodiment, the guide portion 20 is an arc-shaped sheet structure. The arc-shaped sheet structure can provide an orderly flow direction for the airflow, reduce the flow resistance of the airflow, improve the smoothness of the airflow, and enhance the noise reduction effect of the muffler.

[0047] Furthermore, if Figure 2 As shown, the angle θ between the tangent of the arcuate sheet structure on the side closest to the axial hole 111 (i.e., the tail of the arcuate sheet structure) and the perpendicular midplane of the closest narrow passage ranges from -60° to 60°. By properly positioning the arcuate sheet structure on the cover plate 11, the orderly flow of airflow to the exhaust chamber is improved, thereby enhancing the accuracy of the flow direction.

[0048] Further, Figure 3 FIG. 1 shows a schematic diagram of a muffler provided by another embodiment of the present invention. Figure 3 As shown, the airflow guide portion 20 includes a first curved sheet structure 21 and a second curved sheet structure 22. The concave surfaces of the first curved sheet structure 21 and the second curved sheet structure 22 face opposite each other and are arranged in a figure-eight shape. The angles between the two curved sheet structures and the shaft hole 111 both meet the aforementioned radial angle range between the curved sheet structures and the shaft hole 111, thereby improving the accuracy of guiding the airflow to the exhaust chamber in an orderly manner.

[0049] Further, in other embodiments of the present invention, the drainage part 20 may also be set as an arc-shaped three-dimensional structure, and the width of the side of the drainage part 20 facing away from the cover plate 11 is smaller than the width of the side of the drainage part 20 close to the cover plate 11. For example, the side of the drainage part 20 close to the cover plate 11 may be set as a sharp angle or a rounded corner and other structures. Further, the included angle range between the tangent line of the arc-shaped three-dimensional structure close to the shaft hole 111 and the vertical plane of the narrowest channel closest to it is -60° to 60°. By reasonably setting the angular position of the arc-shaped three-dimensional structure on the cover plate 11, the fluidity of the air flow flowing orderly to the position where the exhaust chamber is located is improved, and the accuracy of the diversion direction is improved.

[0050] To further confirm the beneficial effects of the muffler provided by the embodiments of the present invention, a simulation experiment is set up to calculate the noise and pressure loss of the compressor with the muffler of the prior art and the compressor with the muffler of the embodiments of the present invention during operation, and make a comparison. Figure 4 Shows a compressor equipped with a muffler of the prior art, equipped with Figure 1 The compressor with the muffler shown and equipped with Figure 3 The noise comparison diagram of the compressor with the muffler shown; Figure 5 Shows a compressor equipped with a muffler of the prior art, equipped with Figure 1 The compressor with the muffler shown and equipped with Figure 3 The exhaust pressure loss comparison diagram of the compressor with the muffler shown.

[0051] As Figure 4 Shown, the abscissa of the noise comparison diagram is the frequency, with the unit of Hz; the ordinate is the sound amplitude, with the unit of dB. According to Figure 4 It can be obtained that compared with the compressor equipped with the muffler in the prior art, the sound amplitudes of the compressors equipped with the mufflers of the two embodiments of the present invention are significantly lower in the frequency bands below 1000 Hz and above 2000 Hz. Therefore, it shows that the muffler provided by the embodiments of the present invention has obvious noise reduction effects.

[0052] As Figure 5 Shown, the abscissa of the pressure loss comparison diagram is the scheme type, and the ordinate is the pressure loss percentage. As Figure 5 Shown, compared with the compressor equipped with the muffler in the prior art, the pressure loss percentages of the compressors equipped with the mufflers of the two embodiments of the present invention are significantly smaller. Therefore, it shows that the muffler provided by the embodiments of the present invention has a small pressure loss during exhaust.

[0053] The embodiments of the present invention also provide a compressor, including a flange installed on the cylinder and a muffler, and the muffler is arranged on the flange and communicated with the outlet on the flange. Specifically, as Figures 1 to 3As shown in the figure, the silencer is further provided with a mounting portion 30. The mounting portion 30 is provided with a mounting hole 31. The fixing member passes through the mounting hole 31, and the silencer can be mounted on the flange. The compressor of this embodiment has the above-mentioned silencer, so all the technical effects of the above-mentioned silencer can be obtained, which will not be elaborated here.

[0054] In summary, the silencer and the compressor provided by the present invention have the following advantages:

[0055] When the silencer is arranged on the flange of the compressor cylinder, the bearing on the crankshaft is arranged at the shaft hole. When the air flow enters the interior of the cavity portion, part of the air flow enters the chamber where the guiding portion is located. Since one end of the guiding portion points to the position where the shaft hole is located, the guiding portion will guide the air flow to flow orderly in the direction of the shaft hole, and then flow into the slit between the side wall of the silencer and the bearing, and further flow into the exhaust chamber where the exhaust hole is located. Finally, the air flow discharges from the exhaust hole. The energy loss of the orderly air flow is small, thereby reducing the pressure loss of the air flow. The air flow pulsation of the orderly air flow is reduced, thereby reducing the noise generated by the air flow pulsation. Therefore, by arranging the guiding portion inside the cavity portion to guide the disorderly air flow to flow orderly into the exhaust chamber, the pressure loss of the air flow can be reduced, the air flow pulsation can be reduced, the noise can be reduced, and the noise reduction effect of the silencer can be improved.

[0056] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A muffler, characterized in that, For use in a compressor, comprising: A cavity portion, including a cover plate and a side wall provided on one side of the cover plate. The side wall is arranged along the circumferential direction of the cover plate, and the cover plate and the side wall enclose at least one exhaust chamber; At least one drainage portion, provided on the side of the cover plate close to the side wall. The drainage portion extends in a direction away from the cover plate and does not contact the side wall; one end of at least one of the drainage portions points in the direction of the shaft hole of the cover plate, and is used to guide the air flow to flow orderly into the exhaust chamber of the muffler for exhaust.

2. The silencer according to claim 1, characterized in that, The height of the drainage portion is not higher than 0.8 times the height of the side wall.

3. The silencer according to claim 1, wherein, The side wall includes a concave portion that is concave towards the shaft hole. A narrow channel is formed between the concave portion and the shaft hole. The drainage portion guides the air flow through the narrow channel into the exhaust chamber for exhaust.

4. The silencer according to claim 3, wherein, Each of the drainage portions includes an arc-shaped sheet structure.

5. The silencer according to claim 4, characterized in that, The included angle range between the tangent line on the side of the arc-shaped sheet structure close to the shaft hole direction and the vertical plane of the narrow channel closest to it is -60° to 60°.

6. The silencer according to claim 1, characterized in that, Each of the drainage portions includes a first arc-shaped sheet structure and a second arc-shaped sheet structure, and the concave surfaces of the first arc-shaped sheet structure and the second arc-shaped sheet structure face in opposite directions.

7. The muffler according to claim 1, wherein A shaft hole is provided at the center of the cover plate. The cover plate includes a plurality of petal-shaped structures evenly distributed circumferentially around the shaft hole. The cover plate and the side wall enclose a plurality of connected petal-shaped chambers. At least one exhaust hole is provided in at least one of the chambers, and the drainage portion is provided in at least one of the chambers without the exhaust hole.

8. The silencer according to claim 3, characterized in that, The drainage portion is an arc-shaped three-dimensional structure, and the width of the side of the drainage portion away from the cover plate is smaller than the width of the side of the drainage portion close to the cover plate.

9. The silencer according to claim 8, wherein, The included angle range between the tangent line on the side of the arc-shaped three-dimensional structure close to the shaft hole and the vertical plane of the narrow channel closest to it is -60° to 60°.

10. A compressor, characterized in that, Comprising a flange installed on the cylinder and a muffler according to any one of claims 1 to 9. The muffler is provided on the flange and is communicated with the outlet of the flange.

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