Silencing device

Abstract

A silencing device, comprising a housing (102), a main pipe (104) and a partition plate assembly (208). The housing (102) defines a housing cavity (205) and has a housing axis. The main pipe (104) is arranged in the housing cavity (205), the main pipe (104) defines a main pipe accommodation cavity (106) and has a pipe axis, and the pipe axis is parallel to and staggered from the housing axis. The partition plate assembly (208) is arranged between the housing (102) and the main pipe (104), and is connected to the housing (102) and the main pipe (104), such that at least four cavities (212) are formed in a space between the housing (102) and the main pipe (104). At least four communication channels (302) are provided on the main pipe (104), and the at least four communication channels (302) are arranged corresponding to the at least four cavities (212), so as to enable the at least four cavities (212) to be in communication with the main pipe accommodation cavity (106). The at least four cavities (212) are configured to be capable of silencing the fluid flowing through the main pipe (104). The silencing device maximizes the utilization of the space formed by the housing (102) and the main pipe (104), thereby reducing the consumption of production materials, and reducing the overall space used.

Description

Silencers Technical Field

[0001] The present application relates to a silencer device in the field of refrigeration. Background Art

[0002] At the exhaust end of the compressor, since the refrigerant is compressed into high-temperature and high-pressure gas, the refrigerant gas at the exhaust end generates noise and vibration. Summary of the Invention

[0003] The present application provides a silencer device, which includes a shell, a main pipe and a partition assembly. The shell defines a shell cavity and has a shell axis. The main pipe is arranged in the shell cavity, the main pipe defines a main pipe cavity and has a pipe axis, and the pipe axis is parallel to and staggered with the shell axis. The partition assembly is arranged between the shell and the main pipe, and is connected to the shell and the main pipe, so that the space between the shell and the main pipe forms at least four cavities. Wherein, at least four connecting channels are provided on the main pipe, and the at least four connecting channels are arranged corresponding to the at least four cavities, so as to connect the at least four cavities and the main pipe cavity. Wherein, the at least four cavities are configured to be able to silence the fluid flowing through the main pipe.

[0004] According to the above-mentioned muffler device, the housing includes a circumferential portion, and in a cross section perpendicular to the housing axis, the inner edge of the circumferential portion includes at least one circular arc segment, and the main pipe cavity is circular. The ratio of the maximum circular area S1 of the circumferential portion to the area S2 of the main pipe cavity is an expansion ratio S, and the expansion ratio S is greater than or equal to 5.

[0005] According to the above-mentioned muffler device, the inner edge of the circumferential portion includes an arc segment and encloses a circle. The maximum circular area S1 of the circumferential portion is the area enclosed by the inner edge of the circumferential portion.

[0006] According to the above-mentioned muffler device, the inner edge of the circumferential portion includes at least two arc segments. The maximum circular area S1 of the circumferential portion is the maximum circular area formed by the largest arc segment of the circumferential portion.

[0007] According to the above-mentioned muffler device, the housing includes a first end plate and a second end plate, the first end plate and the second end plate being arranged substantially perpendicular to the housing axis and connected to the main pipe. The baffle assembly includes at least one circumferential baffle and at least one axial baffle, the at least one circumferential baffle being arranged substantially perpendicular to the pipe axis and surrounding at least a portion of the main pipe, and the at least one axial baffle being formed to extend axially along the main pipe and connected to the first and second end plates arranged on either side of the at least one circumferential baffle.

[0008] According to the above-mentioned muffler device, the main pipe is provided with at least one first pressure relief hole, and the at least one first pressure relief hole is provided through the main pipe. The at least one first pressure relief hole and the at least four cavities are provided on opposite sides of the first end plate.

[0009] According to the above-mentioned muffler device, the main pipe is provided with at least one second pressure relief hole, the at least one second pressure relief hole is arranged through the main pipe, wherein the at least one second pressure relief hole and the at least four cavities are arranged on opposite sides of the second end plate.

[0010] According to the above-mentioned muffler device, the main pipe is provided with at least four drainage channels, and the at least four drainage channels are arranged corresponding to the at least four cavities, thereby connecting the at least four cavities and the main pipe cavity. The at least four drainage channels are configured to enable liquid in the at least four cavities to be discharged into the main pipe.

[0011] According to the above-mentioned silencer device, the at least four drainage channels are configured such that an angle between the at least four drainage channels and a horizontal plane is greater than 10°.

[0012] According to the above-mentioned noise reduction device, the at least four cavities are configured to reduce noise at different frequencies.

[0013] According to the above-mentioned silencer device, the frequency of the silenced sound is determined based on the volume of the at least four cavities, the flow area of ​​the at least four connecting channels, the flow area and channel length of the at least four drainage channels, and the length of the at least four connecting channels in the at least four cavities.

[0014] The muffler device of the present application fully utilizes the space formed by the housing and the main pipe, staggering the axes of the housing and the main pipe to maximize the use of space and form a cavity for muffler. This not only reduces the use of production materials, but also reduces the overall usable space of the unit, whether the muffler is installed on the outlet pipe of the compressor or at the outlet inside the compressor, effectively reducing the vibration and noise energy of the screw compressor and refrigeration system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The features and advantages of the present application may be better understood by reading the following detailed description with reference to the accompanying drawings, in which like reference numerals represent like parts throughout:

[0016] FIG1A is a perspective view of the muffler of the present application as viewed from the right front;

[0017] FIG1B is a perspective view of the muffler shown in FIG1A as viewed from the left front;

[0018] FIG2 is an exploded view of the muffler shown in FIG1A ;

[0019] FIG3A is a perspective view of the main tube and baffle assembly;

[0020] FIG3B is a rear view of the main tube and baffle assembly;

[0021] FIG4A is a cross-sectional view of the muffler shown in FIG1A taken along line AA in FIG3B;

[0022] FIG4B is a cross-sectional view of the muffler device shown in FIG1A along the center line BB in FIG3B;

[0023] FIG5 is a cross-sectional view of another embodiment of the muffler device of the present application along the center line BB of FIG3B;

[0024] FIG6A is a perspective view of a muffler pipe assembly formed by connecting the muffler device of the present application to a pipe;

[0025] FIG6B is an exploded view of the muffler duct assembly shown in FIG6A as viewed from the right front;

[0026] FIG6C is an exploded view of the muffler duct assembly shown in FIG6A as viewed from the left front;

[0027] FIG. 7 is an axial cross-sectional view of the muffler duct assembly shown in FIG. 6A . DETAILED DESCRIPTION

[0028] The various embodiments of the present application will be described below with reference to the accompanying drawings which form a part of this specification. In the following drawings, the same parts use the same figure numbers.

[0029] FIG1A is a perspective view of the muffler of the present application as viewed from the right front. FIG1B is a perspective view of the muffler shown in FIG1A as viewed from the left front. As shown in FIG1A-1B , the muffler includes a housing 102, a main pipe 104, and a baffle assembly 208 (see FIG2 ). The main pipe 104 is disposed within the housing 102. The baffle assembly 208 is disposed between the housing 102 and the main pipe 104. The main pipe 104 is a circular pipe that defines a main pipe cavity 106 and has a pipe axis X.

[0030] Figure 2 is an exploded view of the silencer shown in Figure 1A. As shown in Figure 2, the housing 102 includes a circumferential portion 222, a first end plate 224, and a second end plate 226. The circumferential portion 222 is a circular tube. In this embodiment, the circumferential portion 222 is a circular tube with a single diameter. The circumferential portion 222 has a housing axis Y. The housing axis Y is parallel to and offset from the tube axis X. In other words, the housing axis Y and the tube axis X are parallel and non-coincident. In this embodiment, the tube axis X is located below the housing axis Y, resulting in a roughly crescent-shaped space between the housing 102 and the main tube 104. The first and second end plates 224, 226 are roughly circular, matching the circumferential portion 222. The first and second end plates 224, 226 are arranged substantially perpendicular to the housing axis Y. The first and second end plates 224, 226 are connected to the circumferential portion 222 at both ends, enclosing the circumferential portion 222 to form the housing cavity 205. The main pipe 104 passes through the housing 102 and extends beyond the first end plate 224 and the second end plate 226 at both ends along the pipe axis X.

[0031] As shown in FIG2 , the muffler device further includes a baffle assembly 208. The baffle assembly 208 is disposed between the shell 102 and the main pipe 104 and is connected to the shell 102 and the main pipe 104. The baffle assembly 208 includes two circumferential baffles and three axial baffles, thereby dividing the space between the shell 102 and the main pipe 104 into twelve chambers 212. Each circumferential baffle is substantially perpendicular to the pipe axis X and the shell axis Y and is disposed around the main pipe 104. In other words, each circumferential baffle connects the circumferential portion 222 and the main pipe 104 in a radial direction of the pipe axis X. Each axial baffle extends along the pipe axis X and connects the first end plate 224 and the second end plate 226. In addition, each axial baffle extends radially along the pipe axis X and connects the circumferential portion 222 and the main pipe 104.

[0032] It should be noted that in this embodiment, the main pipe 104 is surrounded by the circumferential portion 222 of the housing 102, so the circumferential partition is disposed around the main pipe 104. However, in other embodiments, the main pipe 104 may be disposed tangentially to the circumferential portion 222, so the circumferential partition only needs to be disposed around a portion of the main pipe 104.

[0033] In the present application, the partition assembly 208, the first end plate 224 and the second end plate 226 are integrally formed. However, in other embodiments, the partition assembly 208, the first end plate 224 and the second end plate 226 may be connected together by other connection methods such as welding.

[0034] Figure 3A is a perspective view of the main pipe 104 and baffle assembly 208 from the front, and Figure 3B is a rear view of the main pipe 104 and baffle assembly 208. As shown in Figures 3A and 3B, in the present invention, baffle assembly 208 includes a first circumferential baffle 311, a second circumferential baffle 312, a first axial baffle 321, a second axial baffle 322, and a third axial baffle 323. The first circumferential baffle 311 and the second circumferential baffle 312 are evenly spaced along the casing axis Y between the first end plate 224 and the second end plate 226. The angles formed between the first axial baffle 321 and the second axial baffle 322 and the pipe axis X are equal to the angles formed between the second axial baffle 322 and the third axial baffle 323 and the pipe axis X.

[0035] As shown in Figures 3A and 3B, twelve communication channels 302 are provided on the main pipe 104. These twelve communication channels 302 correspond to the twelve cavities 212, allowing the twelve cavities 212 to communicate with the main pipe cavity 106. When gas (e.g., refrigerant gas) flows through the main pipe 104, the pulse energy in the gas can enter the communication channels 302 and stimulate the gas in the corresponding cavities 212 to resonate, thereby dissipating the pressure pulsation energy and achieving noise reduction. Thus, the twelve cavities 212 can muffle the gas flowing through the main pipe 104.

[0036] As shown in Figure 3B, twelve drainage channels 304 are also provided on the main pipe 104. The twelve drainage channels 304 are respectively provided corresponding to the twelve cavities 212, so that the twelve cavities 212 are connected to the main pipe cavity 106. When the gas (for example, refrigerant gas) in the main pipe 104 is mixed with a small amount of liquid (for example, lubricating oil droplets) and enters the cavity 212 through the connecting channel 302, the liquid can be discharged from the cavity 212 back to the main pipe 104 through the drainage channel. In one embodiment of the present application, the drainage channel 304 is a through hole provided on the main pipe 104, and is provided at the lowest point (i.e., the bottom) of the cavity 212 to which it corresponds. The cross-sectional areas of the drainage channel 304 and the connecting channel 302 are both circular. The drainage channel 304 is formed by drilling a hole on the main pipe 104.

[0037] Figure 4A is a cross-sectional view of the silencer shown in Figure 1A along the center line AA of Figure 3B, showing multiple connecting channels 302 of different structures. As shown in Figure 4A, four of the twelve connecting channels 302 are respectively shown as: connecting channel 401, connecting channel 402, connecting channel 403 and connecting channel 404. Among them, the connecting channel 402 is a through hole provided on the main pipe 104. In one embodiment of the present application, the connecting channel 402 is formed by drilling a hole on the main pipe 104. The connecting channel 401, the connecting channel 403 and the connecting channel 404 are formed by a circular tube. Specifically, a connecting through hole 410 is provided on the main pipe 104, and the circular tube surrounds the connecting through hole 410 and extends a distance toward the cavity 212. In the present application, each cavity 212 is configured to silence sounds of different frequencies. The frequency of the sound to be silenced is determined based on the volume of the cavity 212, the flow area of ​​the communication channel 302 (i.e., the cross-sectional area of ​​the communication channel 302), the flow area of ​​the drainage channel 304 (i.e., the cross-sectional area of ​​the drainage channel 304), the channel length of the drainage channel 304 (i.e., the wall thickness of the main pipe 104), and the length of the communication channel 302 in the cavity 212. It will be appreciated that in other embodiments, at least two cavities 212 may also silence the same frequency.

[0038] Figure 4B is a cross-sectional view of the muffler shown in Figure 1A along line BB in Figure 3B, illustrating multiple drainage channels 304 of varying configurations. As shown in Figure 4B, four of the twelve drainage channels 304 are depicted as drainage channel 411, drainage channel 412, drainage channel 413, and drainage channel 414. Drain channels 411, 412, 413, and 414 are all through holes disposed on main pipe 104. The drainage channels 304 are configured such that each drainage channel 304 forms an angle greater than 10° with the horizontal plane. In other words, the bottom surface of each drainage channel 304 forms an angle greater than 10° with the horizontal plane. In the embodiment of the present application, the cross-sections of the drainage channel 411, the drainage channel 412, the drainage channel 413 and the drainage channel 414 are all circular, so that in the axial section of the muffler perpendicular to the pipe axis X and the shell axis Y, the angle between the bottom edge of the drainage channel 411, the drainage channel 412, the drainage channel 413 and the drainage channel 414 and the horizontal plane is greater than 10°. For example, the angle between the drainage channel 411 and the horizontal plane is The angle between the drainage channel 412 and the horizontal plane is 11°. is 30°.

[0039] As shown in Figures 4A-4B, the baffle assembly 208 also includes a filler 420. The filler 420 is disposed below the main pipe 104 and connected to the main pipe 104. The filler 420 fills the bottom of the housing cavity 205, thereby ensuring that the bottoms of the two cavities 212 located at the bottom are flat, thereby facilitating the flow of liquid within the cavities 212 out of the cavities 212 through drainage channels (e.g., drainage channel 411 and drainage channel 414). In one embodiment, the filler 420 is configured such that the angle between the bottom surface of the cavity 212 and the horizontal plane is greater than 10°, thereby forming a continuous inclined surface between the upper surface of the filler 420 and the bottom surface of the drainage channel 304. As a result, each cavity 212 has an outer surface and an inner surface formed by the inner surface of the circumferential portion 222 and the outer surface of the main pipe 104, and two side surfaces located between the outer and inner surfaces are formed by the baffle assembly 208. The filling piece 420 can prevent the space below the main pipe 104 from being used to dispose the cavity 212 , thereby facilitating the drainage of the liquid in the cavity 212 .

[0040] As shown in Figures 4A and 4B, on the axial cross-section of the silencer perpendicular to the pipe axis X and the shell axis Y, the ratio of the maximum circular area S1 of the circumferential portion 222 to the area S2 of the main pipe cavity 106 is an expansion ratio S, and the expansion ratio S is greater than or equal to 5, so that each cavity 212 has a good silencer effect.

[0041] In the present application, on an axial cross-section of the silencer perpendicular to the tube axis X and the shell axis Y, the inner edge of the circumferential portion 222 includes an arc segment and encloses a circle. In addition, for the circumferential portion 222, on any axial cross-section, the radius of the inner edge of the circumferential portion 222 is a constant. That is, in the axial direction of the tube axis X and the shell axis Y, the radius of the inner edge of the circumferential portion 222 is the same. Thus, the maximum circular area S1 of the circumferential portion 222 is the area enclosed by the inner edge of the circumferential portion 222. On an axial cross-section of the silencer perpendicular to the tube axis X and the shell axis Y, the main pipe cavity 106 is circular.

[0042] Figure 5 is a cross-sectional view along the center line BB of Figure 3B of another embodiment of the silencer of the present application, to illustrate different calculation methods of the maximum circular area S1 of the circumferential portion 222. The silencer in Figure 5 is roughly similar to the silencer in Figures 1A to 4B, and the similarities are not repeated here. The difference is that the circumferential portion 222 includes two arc segments, namely the first arc segment 501 and the second arc segment 502. The first arc segment 501 and the second arc segment 502. The diameter of the first arc segment 501 is smaller than the diameter of the second arc segment 502. Among them, the first axial partition 321 and the third axial partition 323 are located at the intersection of the first arc segment 501 and the second arc segment 502, so for any of the four cavities, the outer surface of the cavity is continuous. In this embodiment, the maximum circular area S1 of the circumferential portion 222 is the maximum circular area formed by the largest arc segment of the circumferential portion 222. In other words, because the diameter of the first arc segment 501 is smaller than the diameter of the second arc segment 502, the largest arc segment of the circumferential portion 222 is the second arc segment 502. Therefore, the maximum circular area S1 of the circumferential portion 222 is the area of ​​a circle based on the diameter of the second arc segment 502 (shown by a dotted line in FIG. 5 ).

[0043] It can be understood that, although the present application shows a circumferential portion 222 including one arc segment and two arc segments, the circumferential portion 222 including at least one arc segment is within the protection scope of the present application.

[0044] It can also be understood that although the silencer device in the present application is shown to include a specific number of cavities 212, connecting channels 302 and drainage channels 304, silencer devices including at least four cavities 212, corresponding at least four connecting channels 302 and corresponding at least four drainage channels 304 are all within the scope of protection of the present application.

[0045] The inventors of this application have discovered that, in the prior art, the muffler cavities in the muffler are arranged in a single direction (e.g., along the axial direction of the muffler), resulting in a relatively large volume of the muffler. This not only increases the use of production materials, but also increases the overall space required for the unit (e.g., when arranged on the outlet pipe of the compressor).

[0046] The muffler device of the present application fully utilizes the space formed by the housing and the main pipe, staggering the axes of the housing and the main pipe to maximize the use of space and form a cavity for muffler. This not only reduces the use of production materials, but also reduces the overall usable space of the unit, regardless of whether the muffler device is installed on the outlet pipe of the compressor or at the outlet inside the compressor.

[0047] The inventors of this application also discovered that, in the prior art, refrigeration systems containing screw compressors generate more significant noise and vibration than centrifugal units. Specifically, at the exhaust end of a screw compressor, the refrigerant is compressed into a high-temperature, high-pressure gas by the rotating meshing of the male and female screws, and periodically discharged into the exhaust chamber through internal exhaust holes. Therefore, the refrigerant gas at the exhaust end contains strong pressure pulsation energy, which generates noise and vibration. Therefore, when the silencer of this application is installed within a screw compressor or on the outlet pipe of a screw compressor, it can effectively reduce the vibration and noise energy of the screw compressor and the refrigeration system.

[0048] Figure 6A is a perspective view of a silencer pipe assembly formed by connecting the silencer device of the present application to a pipe, Figure 6B is an exploded view of the silencer pipe assembly shown in Figure 6A as viewed from the right front, and Figure 6C is an exploded view of the silencer pipe assembly shown in Figure 6A as viewed from the left front. As shown in Figure 6A, the silencer pipe assembly includes a silencer 600, a first pipe assembly 601, a second pipe assembly 602, a first connecting assembly 611, and a second connecting assembly 612. The first pipe assembly 601 and the second pipe assembly 602 are respectively arranged on opposite sides of the silencer 600 and are connected to the silencer 600 via the first connecting assembly 611 and the second connecting assembly 612. In the present application, the first connecting assembly 611 and the second connecting assembly 612 each include several bolts. The first pipe assembly 601, the silencer 600, and the second pipe assembly 602 that cooperate therewith are provided with corresponding holes to achieve connection. In other embodiments, the first pipe assembly 601 and the second pipe assembly 602 may also be connected to the silencer 600 through other connection methods (eg, welding, integral molding, etc.).

[0049] As shown in Figures 6B and 6C, the first pipe assembly 601 includes a first flange body 622 and a first pipe 621 that are connected. A first channel 623 is provided on the first flange body 622 and the first pipe 621 and passes through the first flange body 622 and the first pipe 621. When the first flange body 622 is connected to the housing 102, the first channel 623 communicates with the main pipe cavity 106. Similarly, the second pipe assembly 602 includes a second flange body 632 and a second pipe 631 that are connected. A second channel 633 is provided on the second flange body 632 and the second pipe 631 and passes through the second flange body 632 and the second pipe 631. When the second flange body 632 is connected to the housing 102, the second channel 633 communicates with the main pipe cavity 106.

[0050] The silencer 600 shown in Figures 6A and 6C is roughly similar to the silencer shown in Figures 1A to 4B, and the similarities are not repeated here. The difference is that three first pressure relief holes 641 and three second pressure relief holes 642 are also provided on the main pipe 104 of the silencer 600. The first pressure relief holes 641 and the second pressure relief holes 642 are arranged through the main pipe 104, so that the fluid inside and outside the main pipe 104 can be connected. More specifically, the first pressure relief holes 641 and the second pressure relief holes 642 extend through the main pipe 104 perpendicular to the pipe axis X. Among them, the three first pressure relief holes 641 and the cavity 212 are arranged on opposite sides of the first end plate 224. The three second pressure relief holes 642 and the cavity 212 are arranged on opposite sides of the second end plate 226.

[0051] It is understandable that, although the present application shows that three first pressure relief holes 641 and three second pressure relief holes 642 are provided on the main pipe 104 , at least one first pressure relief hole 641 and at least one second pressure relief hole 642 are within the protection scope of the present application.

[0052] Figure 7 is an axial cross-sectional view of the muffler duct assembly shown in Figure 6A. As shown in Figure 7, when the muffler 600, first duct assembly 601, second duct assembly 602, first connecting assembly 611, and second connecting assembly 612 are installed, a first pressure balance chamber 711 is formed between the second end plate 226 of the muffler 600 and the first duct assembly 601, communicating with the three first pressure relief holes 641. A second pressure balance chamber 712 is formed between the first end plate 224 of the muffler 600 and the second duct assembly 602, communicating with the three second pressure relief holes 642.

[0053] As shown in Figure 7, the muffler pipe assembly also includes a first seal 701 and a second seal (not shown). The first seal 701 is arranged between the first pipe assembly 601 and the muffler 600. The second seal is arranged between the second pipe assembly 602 and the muffler 600. The second seal is arranged in a similar manner to the first seal 701. The structure and arrangement of the first seal 701 are used as an example to describe the seals below:

[0054] As shown in FIG7 , the first seal 701 is a sealing ring. The first seal 701 is disposed between the first pipe assembly 601 and the muffler 600 and surrounds the second passage 633 and the main pipe cavity 106. More specifically, one side of the first seal 701 abuts against the sidewall of the first pipe assembly 601, and the other side of the first seal 701 abuts against the end of the main pipe 104 of the muffler 600, thereby preventing the fluid (e.g., refrigerant gas) flowing in the main pipe 104 from passing through the first seal 701 and entering the first pressure balance chamber 711.

[0055] The following describes the details of the flow of gas carrying a small amount of liquid in the muffler pipe assembly with reference to FIG7 :

[0056] For example, when the muffler pipe assembly is installed and gas carrying a small amount of liquid enters the muffler device 600 from the second channel 633, the gas and the small amount of liquid can enter the cavity 212 through the connecting channel 302 of the main pipe 104. This allows the pressure pulsation energy contained in the gas in the second channel 633 to be dissipated through the resonance of the gas in the cavity 212, thereby achieving noise reduction. The small amount of liquid that enters the cavity 212 through the connecting channel 302 is deposited in the cavity 212 due to gravity and returns to the main pipe cavity 106 through the drainage channel 304 located at the bottom of the cavity 212. The small amount of liquid can continue to be carried forward by the gas in the main pipe cavity 106 until it flows out of the muffler pipe assembly.

[0057] When the pressure of the gas flowing into the silencer duct assembly suddenly increases, a portion of the gas flowing through the silencer 600 can enter the first pressure balance chamber 711 and the second pressure balance chamber 712 respectively through the first pressure relief hole 641 and the second pressure relief hole 642. The gas in the first pressure balance chamber 711 and the second pressure balance chamber 712 is balanced with the pressure in the cavity 212 at both ends of the silencer 600, thereby avoiding a sudden change in pressure acting on the first end plate 224 and the second end plate 226 of the silencer 600 when the gas pressure suddenly increases.

[0058] Figures 6A, 6C, and 7 illustrate how the muffler of the present application is connected to a pipe. In other embodiments, the muffler of the present application, as shown in Figure 1A, can also be directly disposed at the exhaust port within the compressor. In other words, the muffler of the present application can be integrated with the compressor as an internal component.

[0059] Although the present disclosure has been described in conjunction with the examples of the embodiments outlined above, various alternatives, modifications, variations, improvements and / or substantial equivalents, whether known or now or foreseeable in the near future, may be apparent to those skilled in the art. In addition, the technical effects and / or technical problems described in this specification are exemplary and not restrictive; so the disclosures in this specification may be used to solve other technical problems and have other technical effects and / or may solve other technical problems. Therefore, the examples of the embodiments of the present disclosure set out above are intended to be illustrative and not restrictive. Various changes may be made without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to include all known or earlier developed alternatives, modifications, variations, improvements and / or substantial equivalents.

Claims

1. A muffler (100), characterized in that: The muffler (100) comprises: a housing (102) defining a housing cavity (205) and having a housing axis; a main pipe (104), the main pipe (104) being disposed in the housing cavity (205), the main pipe (104) defining a main pipe chamber (106) and having a pipe axis, the pipe axis being parallel to and staggered with the housing axis; and a baffle assembly (208), the baffle assembly (208) being disposed between the shell (102) and the main pipe (104) and connected to the shell (102) and the main pipe (104), such that the space between the shell (102) and the main pipe (104) forms at least four cavities (212); The main pipe (104) is provided with at least four communication channels (302), and the at least four communication channels (302) are arranged corresponding to the at least four cavities (212), thereby connecting the at least four cavities (212) and the main pipe cavity (106); The at least four cavities (212) are configured to muffle the fluid flowing through the main pipe (104).

2. The muffler device (100) according to claim 1, characterized in that: The housing (102) includes a circumferential portion (222), and in a cross section perpendicular to the housing axis, an inner edge of the circumferential portion (222) includes at least one arc segment, and the main pipe cavity (106) is circular; The ratio of the maximum circular area S1 of the circumferential portion (222) to the area S2 of the main pipe cavity (106) is an expansion ratio S, and the expansion ratio S is greater than or equal to 5.

3. The muffler device (100) according to claim 2, characterized in that: The inner edge of the circumferential portion (222) includes an arc segment and encloses a circle; The maximum circular area S1 of the circumferential portion (222) is the area enclosed by the inner edge of the circumferential portion (222).

4. The muffler device (100) according to claim 2, characterized in that: The inner edge of the circumferential portion (222) includes at least two arc segments; The maximum circular area S1 of the circumferential portion (222) is the maximum circular area formed by the largest arc segment of the circumferential portion (222).

5. The muffler device (100) according to claim 2, characterized in that: The housing (102) includes a first end plate (224) and a second end plate (226), wherein the first end plate (224) and the second end plate (226) are arranged substantially perpendicular to the housing axis and connected to the main pipe (104); The baffle assembly (208) includes at least one circumferential baffle and at least one axial baffle, wherein the at least one circumferential baffle is substantially perpendicular to the pipe axis and is disposed around at least a portion of the main pipe (104), and the at least one axial baffle is formed along the axial direction of the main pipe (104) and is connected to the first end plate (224) and the second end plate (226) disposed on both sides of the at least one circumferential baffle.

6. The muffler device (100) according to claim 5, characterized in that: At least one first pressure relief hole (641) is provided on the main pipe (104), and the at least one first pressure relief hole (641) is provided through the main pipe (104); Wherein, the at least one first pressure relief hole (641) and the at least four cavities (212) are arranged on opposite sides of the first end plate (224).

7. The muffler device (100) according to claim 6, characterized in that: At least one second pressure relief hole (642) is provided on the main pipe (104), and the at least one second pressure relief hole (642) is provided through the main pipe (104); Wherein, the at least one second pressure relief hole (642) and the at least four cavities (212) are arranged on opposite sides of the second end plate (226).

8. The muffler device (100) according to claim 1, characterized in that: The main pipe (104) is provided with at least four drainage channels (304), and the at least four drainage channels (304) are arranged corresponding to the at least four cavities (212), thereby connecting the at least four cavities (212) and the main pipe cavity (106); The at least four drainage channels (304) are configured to enable the liquid in the at least four cavities (212) to be discharged to the main pipe (104).

9. The muffler device (100) according to claim 8, characterized in that: The at least four drainage channels (304) are configured such that an angle between the at least four drainage channels (304) and a horizontal plane is greater than 10°.

10. The muffler device (100) according to claim 1, characterized in that: The at least four cavities (212) are configured to muffle sounds of different frequencies.

11. The muffler device (100) according to claim 8, characterized in that: The frequency of the silenced sound is determined based on the volume of the at least four cavities (212), the flow area of ​​the at least four communication channels (302), the flow area and channel length of the at least four drainage channels (304), and the length of the at least four communication channels (302) in the at least four cavities (212).

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