Silencer of air compressor and air compressor

Abstract

The embodiment of the utility model provides a silencer of an air compressor and the air compressor. The shell is provided with an inner cavity, an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the inner cavity; the plurality of plate-shaped noise reduction structures are arranged in the inner cavity, the plurality of plate-shaped noise reduction structures define at least one airflow channel in the inner cavity, and the at least one airflow channel is communicated with the air inlet and the air outlet respectively; at least one side plate face of the plate-shaped noise reduction structure is of a flat plate-shaped structure, the plate-shaped noise reduction structure comprises a sound absorption body and a cover body, the sound absorption body comprises a plurality of sound absorption material blocks which are regularly arranged, the cover body wraps at least part of the surface of the sound absorption body, and at least part of the area of the cover body is provided with holes. In this way, the sound-absorbing material blocks can be arranged according to a certain rule, so that a sound-absorbing body with a relatively large size can be easily formed, and the sound attenuation effect can be improved. Due to the fact that the size of the sound-absorbing material block is relatively small and the shape is regular, the production difficulty can be reduced, the production efficiency can be improved, and the production cost can be reduced.

Description

Technical Field

[0001] The exemplary embodiments of the present application generally relate to the field of air compressors, and particularly to a muffler for an air compressor and an air compressor. Background Art

[0002] A muffler is usually arranged in the air flow pipeline system of an air compressor, such as the intake end, the exhaust end, the blow-off end, etc., to reduce the noise generated when the air flow pressure of the air compressor changes rapidly. Mufflers are usually divided into reactive mufflers and resistive mufflers. A reactive muffler is usually provided with spatial structures such as chambers and channels, and through these spatial structures, sound waves are reflected, interfered or diffracted to consume or weaken the energy of the sound waves, so as to reduce the noise level. A resistive muffler uses sound-absorbing materials to absorb the sound energy to reduce the noise level. The monomer size of the sound-absorbing material of the traditional resistive muffler is large, and it is easy to deform after being used for a period of time, the sound absorption effect deteriorates, the production and maintenance costs are relatively high, and the sound absorption effect for high-frequency noise needs to be improved. Summary of the Utility Model

[0003] The purpose of the present application is to provide a muffler for an air compressor and an air compressor to solve or at least partially solve the above problems and / or other potential problems existing in the traditional muffler.

[0004] The first aspect of the present application provides a muffler for an air compressor. The muffler for the air compressor includes: a housing having an inner cavity, and an air inlet and an air outlet communicating with the inner cavity; a plurality of plate-shaped muffling structures arranged in the inner cavity, at least one side plate surface of the plate-shaped muffling structure being a flat plate structure, and the plurality of plate-shaped muffling structures defining at least one air flow channel in the inner cavity, and at least one air flow channel communicating with the air inlet and the air outlet respectively; the plate-shaped muffling structure includes a sound absorber and a cover body, the sound absorber includes a plurality of regularly arranged sound-absorbing material blocks, the cover body covers at least part of the surface of the sound absorber, and at least part of the area of the cover body is provided with holes.

[0005] In some embodiments, the plurality of plate-shaped muffling structures are arranged along the thickness direction of the plate-shaped muffling structure, and there is a gap between two adjacent plate-shaped muffling structures to form an air flow channel through the gap.

[0006] In some embodiments, the opposite plate surfaces of two adjacent plate-shaped muffling structures are flat plate structures and are parallel to each other.

[0007] In some embodiments, the housing includes a first cylindrical structure, and the plurality of plate-shaped muffling structures are arranged at intervals along the radial direction of the first cylindrical structure, and each plate-shaped muffling structure extends along the axial direction of the first cylindrical structure to form an air flow channel extending along the axial direction of the first cylindrical structure.

[0008] In some embodiments, the plurality of plate-shaped sound-absorbing structures include a first plate-shaped sound-absorbing structure disposed adjacent to one side wall of the inner cavity and a second plate-shaped sound-absorbing structure disposed adjacent to the opposite side wall of the inner cavity.

[0009] In some embodiments, the plurality of plate-shaped sound-absorbing structures further include a third plate-shaped sound-absorbing structure located between the first plate-shaped sound-absorbing structure and the second plate-shaped sound-absorbing structure.

[0010] In some embodiments, the third plate-shaped sound-absorbing structure includes two sound-absorbing bodies arranged in a stacked manner and a partition located between the two sound-absorbing bodies. One sound-absorbing body faces the first plate-shaped sound-absorbing structure, and the other sound-absorbing body faces the second plate-shaped sound-absorbing structure.

[0011] In some embodiments, the housing further includes a first cylindrical structure, a second cylindrical structure, and a third cylindrical structure. The plurality of plate-shaped sound-absorbing structures are disposed within the first cylindrical structure. An air inlet is provided at one end of the second cylindrical structure, and the other end of the second cylindrical structure is connected to one end of the first cylindrical structure. An air outlet is provided at one end of the third cylindrical structure, and the other end of the third cylindrical structure is connected to the other end of the first cylindrical structure.

[0012] In some embodiments, a first flange is provided at one end of the second cylindrical structure, and a second flange is provided at one end of the third cylindrical structure.

[0013] In some embodiments, the sound-absorbing material blocks are regularly arranged along the length direction and / or the width direction of the plate-shaped sound-absorbing structure. The length direction and the width direction are perpendicular to the thickness direction of the plate-shaped sound-absorbing structure, and the length direction and the width direction are perpendicular to each other.

[0014] In some embodiments, at least part of the sound-absorbing material blocks of the sound-absorbing body are metal rubber blocks.

[0015] In some embodiments, the inner cavity has a first space and a second space. The first space has a first temperature range, and the second space has a second temperature range. The first temperature range is higher than the second temperature range. The sound-absorbing material blocks of the sound-absorbing body located in the first space are metal rubber blocks, and the sound-absorbing material blocks of the sound-absorbing body located in the second space are sponge blocks.

[0016] In some embodiments, the cover body at least covers the surface of the sound-absorbing body adjacent to the air flow channel.

[0017] In some embodiments, it further includes at least one positioning bracket. The at least one positioning bracket is disposed in the inner cavity, and the at least one positioning bracket is respectively connected to the housing and the plurality of plate-shaped sound-absorbing structures to position the plurality of plate-shaped sound-absorbing structures in the inner cavity.

[0018] The second aspect of the present application provides an air compressor, including the muffler of the air compressor as described above.

[0019] In the silencer of the air compressor of the embodiment of the present application, the sound-absorbing body inside the plate-like sound-absorbing structure is formed by a plurality of regularly arranged sound-absorbing material blocks. Under the covering of the cover body, the overall shape of the plurality of sound-absorbing material blocks can be maintained, so that the plate-like sound-absorbing structure as a whole is in the shape of a plate or approximately in the shape of a plate. In this way, a relatively large overall sound-absorbing body can be formed by arranging sound-absorbing material blocks with relatively small individual sizes and relatively regular shapes according to a certain rule, so that the size of the sound-absorbing body is no longer limited by the production and processing technology and the difficulty of processing, which is conducive to improving the sound-absorbing effect. Since the individual sizes of the sound-absorbing material blocks are relatively small and the shapes are relatively regular, the production difficulty can be reduced, which is conducive to improving the production efficiency, and then to reducing the production cost. Moreover, under the covering of the cover body, the small-sized sound-absorbing material blocks are not easily deformed, which is conducive to maintaining the sound-absorbing effect. Even if some of the sound-absorbing material blocks are deformed, they can be replaced in a targeted manner, which is conducive to reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other features, advantages and aspects of the embodiments of the present application will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0021] Figure 1 A perspective view of a muffler of an air compressor according to some embodiments of the present application is shown;

[0022] Figure 2 and Figure 3 The three-dimensional cross-sectional views of the muffler of the air compressor according to some embodiments of the present application are shown respectively at different viewing angles;

[0023] Figure 4 and Figure 5 Cross-sectional views of a muffler of an air compressor according to some embodiments of the present application at different viewing angles are respectively shown;

[0024] Figure 6 A schematic diagram of the internal structure of a muffler of an air compressor according to some embodiments of the present application is shown;

[0025] Figure 7 A perspective view showing a sound absorbing body of a first plate-shaped sound-absorbing structure according to some embodiments of the present application; and

[0026] Figure 8 A three-dimensional view of a sound absorbing body of a third plate-shaped sound-absorbing structure according to some embodiments of the present application is shown.

[0027] Description of reference numerals:

[0028] 10 - Housing; 11 - Inner cavity; 12 - Air inlet; 13 - Air outlet; 14 - First cylindrical structure; 15 - Second cylindrical structure; 16 - Third cylindrical structure; 17 - First flange; 18 - Second flange;

[0029] 20 - Plate-shaped sound-absorbing structure; 21 - First plate-shaped sound-absorbing structure; 22 - Second plate-shaped sound-absorbing structure; 23 - Third plate-shaped sound-absorbing structure; 24 - Sound-absorbing body; 25 - Sound-absorbing material block; 26 - Cover; 27 - Partition; 28 - Air flow channel;

[0030] 30 - Positioning bracket. Detailed implementation

[0031] Hereinafter, the preferred embodiments of the present application will be described in more detail with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0032] As used herein, the term "including" and its variants mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects.

[0033] An embodiment of the present application provides a muffler for an air compressor. Refer to Figures 1 to 6 As shown, the muffler of the air compressor according to the embodiment of the present application includes a housing 10 and a plurality of plate-shaped sound-absorbing structures 20.

[0034] The housing 10 has an inner cavity 11, and an air inlet 12 and an air outlet 13 communicating with the inner cavity 11. Alternatively or additionally, the housing 10 may include a cylindrical structure, and the inner cavity 11 having a cylindrical or approximately cylindrical shape may be provided inside the cylindrical structure, and the air inlet 12 and the air outlet 13 may be respectively provided at both ends of the cylindrical structure. Of course, the above-mentioned housing 10 is only exemplary, and in actual application, the housing 10 can be constructed into any appropriate shape according to actual needs. The present application makes no limitation in this regard.

[0035] A plurality of plate-shaped sound-absorbing structures 20 are provided in the inner cavity 11. At least one side plate surface of the plate-shaped sound-absorbing structure 20 can be a flat plate structure, which should be understood that at least one side plate surface of the plate-shaped sound-absorbing structure 20 can be a flat plate structure or approximately a flat plate structure. In some embodiments, one or both sides of the plurality of plate-shaped sound-absorbing structures 20 close to the air flow channel 28 are flat plate structures or approximately flat plate structures. In some embodiments, one or both sides of the plurality of plate-shaped sound-absorbing structures 20 close to the inner cavity wall are designed to fit the inner cavity wall. The plurality of plate-shaped sound-absorbing structures 20 define at least one air flow channel 28 in the inner cavity 11, and at least one air flow channel 28 communicates with the air inlet 12 and the air outlet 13 respectively. Alternatively or additionally, the gas flow can be defined by the plurality of plate-shaped sound-absorbing structures 20, or can be jointly defined by the plurality of plate-shaped sound-absorbing structures 20 and the cavity wall of the inner cavity 11. The extending direction of the air flow channel 28 can be the same as the extending direction of the inner cavity 11. Exemplarily, when the inner cavity 11 is cylindrical, the air flow channel 28 can extend along the axial direction of the inner cavity 11.

[0036] The plate-shaped sound-absorbing structure 20 includes a sound-absorbing body 24 and a cover body 26. The sound-absorbing body 24 includes a plurality of regularly arranged sound-absorbing material blocks. It should be understood that the regular arrangement here can include that a plurality of sound-absorbing material blocks 25 are arranged according to any appropriate rule to form the sound-absorbing body 24. Alternatively or additionally, the plurality of sound-absorbing material blocks 25 can be regularly arranged in one direction or in multiple directions. The cover body 26 covers at least part of the surface of the sound-absorbing body 24. At least part of the area of the cover body 26 is provided with holes. Through the cover body 26, the sound-absorbing material blocks 25 can be gathered to maintain the shape of the sound-absorbing body 25, and the sound-absorbing material blocks 25 can be protected to a certain extent to avoid the air flow from damaging the sound-absorbing material blocks 25. Alternatively or additionally, holes can be deployed in the entire area of the cover body 26, or holes can be deployed in a partial area of the cover body 26. For example, holes can be deployed in the area of the cover body 26 close to the air flow channel 28 to facilitate the sound waves in the air flow channel 28 to enter the sound-absorbing body 24. In some embodiments, the cover body 26 can at least protect the surface of the sound-absorbing body 24 close to the air flow channel 28 to avoid the air flow from damaging the sound-absorbing body 24.

[0037] During the actual use process, the air flow flows into the inner cavity 11 of the housing 10 from the air inlet 12 and enters the at least one air flow channel 28. The sound waves generated by the air flow can pass through the holes on the cover body 26. During the process of passing through the holes, the sound waves can generate friction with the holes, and part of the energy of the sound waves will be converted into heat energy, thereby reducing the noise intensity. After passing through the holes, the sound waves are transmitted into the sound-absorbing material blocks 25, and friction and collision occur with the sound-absorbing material blocks 25. Part of the energy of the sound waves is absorbed by the sound-absorbing material blocks 25 to further reduce the noise intensity. Finally, the air flow flows out of the inner cavity 11 through the air outlet 13.

[0038] In the silencer of the air compressor of the embodiment of the present application, the sound absorbing body 24 inside the plate-shaped sound-absorbing structure 20 is formed by a plurality of regularly arranged sound-absorbing material blocks 25. Under the covering of the cover 26, the overall shape of the plurality of sound-absorbing material blocks 25 can be maintained, so that the plate-shaped sound-absorbing structure 20 is flat or approximately flat as a whole. In this way, a relatively large sound-absorbing body 24 can be formed by arranging the sound-absorbing material blocks 25 with relatively small size and relatively regular shape according to a certain rule, so that the size of the sound-absorbing body 24 is no longer restricted by the production and processing technology and the difficulty of processing, which is conducive to improving the sound-absorbing effect. Since the size of the sound-absorbing material blocks 25 is relatively small and the shape is relatively regular, the production difficulty can be reduced, which is conducive to improving the production efficiency, and then to reducing the production cost. Moreover, under the covering of the cover 26, the small-sized sound-absorbing material blocks 25 are not easy to deform, which is conducive to maintaining the sound-absorbing effect. Even if some of the sound-absorbing material blocks 25 are deformed, they can be replaced in a targeted manner, which is conducive to reducing the maintenance cost.

[0039] In some embodiments, a plurality of plate-like sound-absorbing structures 20 are arranged along the thickness direction of the plate-like sound-absorbing structures 20, and there is a gap between two adjacent plate-like sound-absorbing structures 20, so as to form an airflow channel 28 through the gap. In this way, the arrangement direction of the plurality of plate-like sound-absorbing structures 20 is regular, and a relatively regular airflow channel 28 can be formed, which is conducive to reducing the resistance to the airflow. Figure 2 and Figure 3 The Y-axis direction is the thickness direction of the multiple plate-like silencer structures 20. The multiple plate-like silencer structures 20 can be arranged in sequence along the Y-axis direction, and there is a gap between any two adjacent plate-like silencer structures 20, through which the airflow channel 28 is formed.

[0040] In some embodiments, the relative plate surfaces of two adjacent plate-like sound-absorbing structures 20 are flat plate-like structures and are parallel to each other. In this way, an airflow channel 28 with a uniform width can be formed between the two adjacent plate-like sound-absorbing structures 20, which is beneficial to improving the stability of the airflow and reducing the resistance of the airflow. Of course, according to actual needs, the relative plate surfaces of two adjacent plate-like sound-absorbing structures 20 can also be constructed to be non-parallel to each other, and it should not be understood that the relative plate surfaces of two adjacent plate-like sound-absorbing structures 20 are limited to being parallel to each other.

[0041] In some embodiments, the combination of 1 to Figure 5 As shown, the housing 10 includes a first cylindrical structure 14. A plurality of plate-like muffler structures 20 are arranged at intervals along the radial direction of the first cylindrical structure 14, and each plate-like muffler structure 20 extends along the axial direction of the first cylindrical structure 14 to form an air flow channel 28 extending along the axial direction of the first cylindrical structure 14. For example, Figure 3As shown, the radial direction of the first cylindrical structure 14 can be parallel to the Y-axis direction, and multiple plate-shaped sound-absorbing structures can be arranged at intervals along the Y-axis direction. In this way, not only can the plate-shaped sound-absorbing structure 20 itself maintain a relatively regular shape, thereby reducing the production difficulty, but also a straight air flow channel 28 can be formed, which is beneficial to reducing the resistance to the air flow.

[0042] In some embodiments, in cooperation with Figure 1 , Figure 2 and Figure 5 As shown, the housing 10 may further include a second cylindrical structure 15 and a third cylindrical structure 16. An air inlet 12 is provided at one end of the second cylindrical structure 15, the other end of the second cylindrical structure 15 is connected to one end of the first cylindrical structure 14, an air outlet 13 is provided at one end of the third cylindrical structure 16, and the other end of the third cylindrical structure 16 is connected to the other end of the first cylindrical structure 14. In this way, the air flow first flows into the second cylindrical structure 15 through the air inlet 12, and then flows into each air flow channel 28 through the second cylindrical structure 15, and the flow rate and pressure of each air flow channel 28 can be kept balanced. After flowing out of each air flow channel 28, it flows into the third cylindrical structure 16, and after mixing in the third cylindrical structure 16, it flows out through the air outlet 13, which is beneficial to improving the stability of exhaust.

[0043] Alternatively or additionally, the axes of the first cylindrical structure 14, the second cylindrical structure 15, and the third cylindrical structure 16 can coincide to achieve the centering of the cylindrical cavities of the first cylindrical structure 14, the second cylindrical structure 15, and the third cylindrical structure 16, which is beneficial to reducing the resistance to the air flow.

[0044] Alternatively or additionally, a first flange 17 is provided at one end of the second cylindrical structure 15, and a second flange 18 is provided at one end of the third cylindrical structure 16. In this way, the muffler can be connected to the intake pipeline structure and the exhaust pipeline structure through the first flange 17 and the second flange 18 respectively. It should be noted that the intake pipeline structure and the exhaust pipeline structure here can be pipes or corresponding interfaces on the equipment, and the intake pipeline structure and the exhaust pipeline structure are not limited here.

[0045] In some embodiments, in cooperation with Figures 2 to 5 As shown, the multiple plate-shaped sound-absorbing structures 20 may include a first plate-shaped sound-absorbing structure 21 disposed close to one side wall of the inner cavity 11 and a second plate-shaped sound-absorbing structure 22 disposed close to the other side wall opposite to the inner cavity 11. In this way, an air flow channel 28 can be formed between the first plate-shaped sound-absorbing structure 21 and the second plate-shaped sound-absorbing structure 22.

[0046] Alternatively or additionally, the plurality of plate-shaped sound-absorbing structures may further include a third plate-shaped sound-absorbing structure 23 located between the first plate-shaped sound-absorbing structure 21 and the second plate-shaped sound-absorbing structure 22. In this way, an air flow channel 28 can be formed between the first plate-shaped sound-absorbing structure 21 and the third plate-shaped sound-absorbing structure 23, and between the third plate-shaped sound-absorbing structure 23 and the second plate-shaped sound-absorbing structure 22 respectively, which is beneficial to improving the sound-absorbing effect. Of course, the above examples are only exemplary. In actual applications, other numbers of plate-shaped sound-absorbing structures 20 can also be set, and the number of plate-shaped sound-absorbing structures 20 is not limited here.

[0047] Exemplarily, equipped with Figures 3 to 6 As shown, the surface of the sound absorber 24 of the first plate-shaped sound-absorbing structure 21 opposite to the third plate-shaped sound-absorbing structure 23 is a plane, and the surface of the sound absorber 24 opposite to one side wall of the inner cavity 11 is an arc surface and matches the shape of one side wall of the inner cavity 11, so as to be able to fit with the side wall of the inner cavity 11. The cover 26 of the first plate-shaped sound-absorbing structure 21 can cover the top surface, the surface opposite to the third plate-shaped sound-absorbing structure 23, and the bottom surface of the sound absorber 24. The second plate-shaped sound-absorbing structure 22 is symmetric with the first plate-shaped sound-absorbing structure 21 along the axis of the first cylindrical structure 14. The inner wall fitting design of the first plate-shaped sound-absorbing structure 21 and the second plate-shaped sound-absorbing structure 22 enables the first plate-shaped sound-absorbing structure 21 and the second plate-shaped sound-absorbing structure 22 to have a better sound-absorbing effect on the noise in a relatively high frequency range.

[0048] The sound absorber 24 of the third plate-shaped sound-absorbing structure 23 is in the shape of a flat cuboid, and the surfaces of the sound absorber 24 of the third plate-shaped sound-absorbing structure 23 opposite to the first plate-shaped sound-absorbing structure 21 and the second plate-shaped sound-absorbing structure 22 are both planes and are both rectangular. The cover 26 of the third plate-shaped sound-absorbing structure 23 covers the top surface, the bottom surface, and the surfaces opposite to the first plate-shaped sound-absorbing structure 21 and the second plate-shaped sound-absorbing structure 22, which is convenient for installing the sound absorber 24 on the cover 26 later. There is a certain gap between the top surface and the bottom surface of the third plate-shaped sound-absorbing structure 23 and the cavity wall of the inner cavity 11, which is beneficial to the sound-absorbing effect of the muffler on the noise in a relatively low frequency range, and is beneficial to saving sound-absorbing materials and improving production efficiency.

[0049] In some embodiments, cooperate with Figure 4 、 Figure 5 and Figure 8As shown, the third plate-shaped sound-absorbing structure 23 includes two sound-absorbing bodies 24 arranged in a stacked manner and a partition 27 disposed between the two sound-absorbing bodies 24. One of the sound-absorbing bodies 24 faces the first plate-shaped sound-absorbing structure 23, and the other sound-absorbing body 24 faces the second plate-shaped sound-absorbing structure 24. In this way, it can ensure that the air flow channels 28 on both sides of the third plate-shaped sound-absorbing structure 23 have good sound-absorbing effects, and the partition 27 can support the sound-absorbing material blocks 25 of the sound-absorbing body 24 to improve the stability of the sound-absorbing body 24. The partition 27 can also block the air flow and sound waves, prevent the air flow from passing through the plate-shaped sound-absorbing structure 20, so as to reduce the resistance to the air flow, reduce the gas pressure drop, and can also prevent the sound waves from passing through the plate-shaped sound-absorbing structure 20 to a certain extent, so as to improve the sound-absorbing effect on high-frequency noise.

[0050] In some embodiments, the plurality of sound-absorbing material blocks 25 of the sound-absorbing body 24 can be regularly arranged along the length direction and / or the width direction of the plate-shaped sound-absorbing structure 20. The length direction and the width direction are perpendicular to the thickness direction of the plate-shaped sound-absorbing structure 20, and the length direction and the width direction are perpendicular to each other. In this way, the plurality of sound-absorbing material blocks 25 are arranged in an approximate grid pattern, which is beneficial to improving the consistency of the plurality of sound-absorbing material blocks 25, and thus is beneficial to improving the production efficiency and reducing the production cost.

[0051] Exemplarily, as Figure 7 shown, Figure 7 shows a perspective view of the sound-absorbing body 24 of the first plate-shaped sound-absorbing structure 21 according to some embodiments of the present application. The thickness direction of the first plate-shaped sound-absorbing structure 21 is Figure 7 the Y-axis direction in Figure 7 the X-axis direction in the first plate-shaped sound-absorbing structure 21, and the width direction of the first plate-shaped sound-absorbing structure 21 is Figure 7 the Z-axis direction in

[0052] Also for example, as Figure 8 shown, Figure 8 shows a perspective view of the sound-absorbing body 24 of the third plate-shaped sound-absorbing structure 23 according to some embodiments of the present application. The third plate-shaped sound-absorbing structure 23 includes two stacked sound-absorbing bodies 24, and both sound-absorbing bodies 24 are in the shape of a flat cuboid. The thickness direction of the third plate-shaped sound-absorbing structure 23 is Figure 8 the Y-axis direction in Figure 8 the X-axis direction in the third plate-shaped sound-absorbing structure 23, and the width direction of the third plate-shaped sound-absorbing structure 23 is Figure 8the Z-axis therein. The multiple sound-absorbing material blocks 25 of the two sound-absorbing bodies 24 are all flat cuboid shapes. The multiple sound-absorbing material blocks 25 are arranged along the Figure 8 X-axis direction and the Z-axis direction therein.

[0053] In some embodiments, at least some of the sound-absorbing material blocks 25 of the sound-absorbing body 24 are metal rubber blocks. The metal rubber blocks herein refer to porous block structures with a certain elasticity formed by pressing (such as stamping or rolling, etc.) metal wires. By providing the metal rubber blocks, a better sound absorption effect can be formed on high-frequency noise, and the metal rubber blocks have the characteristic of high temperature resistance, so that the muffler can be applied to high-temperature environments or used for reducing the noise of high-temperature gases. Alternatively or additionally, the sound-absorbing body 24 may include multiple metal rubber blocks with different densities. By providing metal rubber blocks with different densities, noises in different frequency bands can be eliminated to increase the frequency band range that the muffler can cover.

[0054] In some embodiments, a part of the sound-absorbing material blocks 25 of the sound-absorbing body 24 are metal rubber blocks, and another part of the sound-absorbing material blocks 25 of the sound-absorbing body 24 are sponge blocks. In this way, the sound absorption effect, high temperature resistance characteristics, and production cost can be taken into account. Alternatively or additionally, the inner cavity 11 has a first space and a second space. The first space has a first temperature range, and the second space has a second temperature range. The first temperature range is higher than the second temperature range; the sound-absorbing material blocks 25 of the sound-absorbing body 24 located in the first space are metal rubber blocks, and the sound-absorbing material blocks of the sound-absorbing body 24 located in the second space are sponge blocks. The first temperature range may be the working temperature range of the first space during the operation of the muffler, or the temperature range that the first space may have during the production and processing of the muffler. Similarly, the second temperature range may be the temperature range of the first space during the operation of the muffler, or the temperature range that the first space may have during the production and processing of the muffler. The first space and the second space here may be continuous spaces or discontinuous spaces. There may be an obvious dividing line between the first space and the second space, or there may be no obvious dividing line. The inner cavity 11 is not limited to including the first space and the second space, and may also include other controls outside the first space and the second space, such as a third space, a fourth space, etc. The embodiments of the present disclosure do not limit this.

[0055] For example, during the production and processing of the muffler, welding is required at both ends of the housing 10. The temperature of the space near both ends of the housing 10 in the inner cavity 11 is relatively high, and the temperature of the space near the middle of the housing 10 in the inner cavity 11 is relatively low. The space near both ends of the housing 10 in the inner cavity 11 can be used as the first space, and the space near the middle of the housing 11 in the inner cavity 11 can be used as the second space. Metal rubber blocks can be arranged near both ends of the inner cavity 11, and sponge blocks can be arranged in the middle of the inner cavity 11.

[0056] In some embodiments, in cooperation with Figure 2 , Figure 4 and Figure 6 as shown, the muffler may further include at least one positioning bracket 30. The at least one positioning bracket 30 is disposed in the inner cavity 11, and the at least one positioning bracket 30 is respectively connected to the housing 10 and the plurality of plate-shaped muffling structures 20 to position the plurality of plate-shaped muffling structures 20 in the inner cavity 11. In this way, the stability of the muffler can be improved.

[0057] Alternatively or additionally, as Figure 6 shown, the muffler may include two positioning brackets 30. The two positioning brackets 30 may be disposed in the first cylindrical structure 14 and respectively near both ends of the first cylindrical structure 14, and the two positioning brackets 30 may confine the plurality of plate-shaped muffling structures 20 between the two positioning brackets 30.

[0058] Exemplarily, as Figure 6 shown, the positioning bracket 30 may include an annular frame and a cross-shaped bracket located inside the annular frame. The positioning bracket 30 may be connected to the first cylindrical structure 14 through the annular frame. Both ends of the first plate-shaped muffling structure 21 and the second plate-shaped muffling structure 22 may be respectively connected to the annular frames of the two positioning brackets 30, and both ends of the third plate-shaped muffling structure 23 may be respectively connected to the cross-shaped brackets of the two positioning brackets 30.

[0059] The embodiment of the present application also provides an air compressor, including the muffler described in any of the above embodiments. The muffler may be disposed at the air outlet of the air compressor or at the air outlet of the exhaust pipe of the air compressor, etc. Since the above muffler has a relatively low production cost and has excellent muffling effects, applying the above muffler is beneficial to reducing the production cost of the air compressor and is beneficial to reducing the noise level of the air compressor.

[0060] The above has described the embodiments of the present application. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the disclosed embodiments.

Claims

1. A silencer for an air compressor, characterized in that, Comprising: A housing having an inner cavity, and an air inlet and an air outlet communicating with the inner cavity; A plurality of plate-shaped sound-absorbing structures disposed in the inner cavity, the plurality of plate-shaped sound-absorbing structures defining at least one air flow channel in the inner cavity, the at least one air flow channel communicating with the air inlet and the air outlet respectively; at least one side plate surface of the plate-shaped sound-absorbing structure is a flat plate structure, the plate-shaped sound-absorbing structure includes a sound-absorbing body and a cover body, the sound-absorbing body includes a plurality of regularly arranged sound-absorbing material blocks, the cover body covers at least a part of the surface of the sound-absorbing body, and at least a part of the area of the cover body is provided with holes.

2. The silencer of the air compressor according to claim 1, characterized in that, The plurality of plate-shaped sound-absorbing structures are arranged along the thickness direction of the plate-shaped sound-absorbing structure, and there is a gap between two adjacent plate-shaped sound-absorbing structures to form the air flow channel through the gap.

3. The silencer of the air compressor according to claim 2, characterized in that, The opposite plate surfaces of two adjacent plate-shaped sound-absorbing structures are flat plate structures and are parallel to each other.

4. The silencer of the air compressor according to claim 2, wherein, The housing includes a first cylindrical structure, the plurality of plate-shaped sound-absorbing structures are arranged at intervals along the radial direction of the first cylindrical structure, and each of the plate-shaped sound-absorbing structures extends along the axial direction of the first cylindrical structure to form the air flow channel extending along the axial direction of the first cylindrical structure.

5. The silencer of the air compressor according to claim 4, wherein, The plurality of plate-shaped sound-absorbing structures include a first plate-shaped sound-absorbing structure disposed close to one side wall of the inner cavity and a second plate-shaped sound-absorbing structure disposed close to the opposite side wall of the inner cavity.

6. The silencer of the air compressor according to claim 5, characterized in that, The plurality of plate-shaped sound-absorbing structures further include a third plate-shaped sound-absorbing structure located between the first plate-shaped sound-absorbing structure and the second plate-shaped sound-absorbing structure.

7. The silencer of the air compressor according to claim 6, characterized in that, The third plate-shaped sound-absorbing structure includes two sound-absorbing bodies stacked and a partition located between the two sound-absorbing bodies, one sound-absorbing body is opposite to the first plate-shaped sound-absorbing structure, and the other sound-absorbing body is opposite to the second plate-shaped sound-absorbing structure.

8. The silencer of the air compressor according to any one of claims 1-7, characterized in that, The housing further includes a first cylindrical structure, a second cylindrical structure and a third cylindrical structure, the plurality of plate-shaped sound-absorbing structures are disposed in the first cylindrical structure, one end of the second cylindrical structure is provided with the air inlet, the other end of the second cylindrical structure is connected to one end of the first cylindrical structure, one end of the third cylindrical structure is provided with the air outlet, and the other end of the third cylindrical structure is connected to the other end of the first cylindrical structure.

9. The silencer of the air compressor according to claim 8, characterized in that, One end of the second cylindrical structure is provided with a first flange, and one end of the third cylindrical structure is provided with a second flange.

10. The muffler of the air compressor according to claim 1, characterized in that, The sound-absorbing material blocks are regularly arranged along the length direction and / or the width direction of the plate-shaped sound-absorbing structure, the length direction and the width direction are perpendicular to the thickness direction of the plate-shaped sound-absorbing structure, and the length direction and the width direction are perpendicular to each other.

11. The muffler of the air compressor according to claim 1, characterized in that, At least part of the sound-absorbing material blocks of the sound-absorbing body are metal rubber blocks.

12. The silencer of the air compressor according to claim 11, characterized in that, The inner cavity has a first space and a second space, the first space has a first temperature range, the second space has a second temperature range, the first temperature range is higher than the second temperature range; the sound-absorbing material blocks of the sound-absorbing body located in the first space are metal rubber blocks, and the sound-absorbing material blocks of the sound-absorbing body located in the second space are sponge blocks.

13. The silencer of the air compressor according to claim 1, characterized in that, The cover body covers at least the surface of the sound-absorbing body close to the air flow channel.

14. The silencer of the air compressor according to claim 1, characterized in that, It further includes at least one positioning bracket, the at least one positioning bracket is disposed in the inner cavity, and the at least one positioning bracket is respectively connected to the housing and the plurality of plate-shaped sound-absorbing structures to position the plurality of plate-shaped sound-absorbing structures in the inner cavity.

15. An air compressor, characterized in that, It includes a silencer according to any one of claims 1 to 14.

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