Muffler, muffling device, and vehicle

Abstract

The utility model discloses related to the technical field of vehicle, and discloses a muffler, a muffling device and a vehicle, the muffler includes the casing, the sound absorbing structure and the blocking piece, the casing is provided with the entrance and the outlet, and the sound absorbing structure and the blocking piece are all arranged in the casing interior, the blocking piece includes the first flow guide part and the first blocking part, the first flow guide part is provided with the first flow guide channel and the first exhaust port, the first flow guide channel has the opposite first inlet and the first outlet, the first inlet is communicated with the entrance, the first blocking part covers the first outlet, the first exhaust port is located the first flow guide channel along the first flow guide channel radial one side, the first exhaust port is communicated with the first flow guide channel, and the sound absorbing structure is communicated the first exhaust port and the outlet. The technical scheme of the utility model can solve the problem of how to improve the water vapor separation effect of the muffling device and improve the flow efficiency of the gas.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to mufflers, noise reduction equipment, and vehicles. Background Technology

[0002] The noise reduction equipment in fuel cell vehicles is mainly used to discharge water vapor and liquid water generated by the cathode reaction of the fuel cell stack, as well as liquid water, nitrogen, and a small amount of hydrogen generated by the anode, to the outside of the vehicle, while reducing exhaust noise.

[0003] In existing technologies, a filter screen is installed inside the silencing equipment. The filter screen blocks water vapor and liquid water in the gas, allowing the gas to pass through normally, thereby separating the gas and water and preventing the water in the gas from affecting the silencing material in the silencing equipment.

[0004] However, the existing technology of using filters to separate water from gas is not very effective, and water adhering to the filter will increase the flow resistance of gas inside the silencer, thus affecting the flow efficiency of gas inside the silencer. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a muffler, a muffler device, and a vehicle, which aims to solve the problem of how to improve the water vapor separation effect of the muffler device and improve the gas flow efficiency.

[0006] In a first aspect, embodiments of this application provide a muffler, including a housing, a silencing structure, and a blocking member; the housing is provided with an inlet and an outlet, and the silencing structure and the blocking member are both disposed inside the housing; the blocking member includes a first guide portion and a first blocking portion, the first guide portion is provided with a first guide channel and a first exhaust port, the first guide channel has a first inlet and a first outlet opposite to each other, the first inlet is connected to the inlet, the first blocking portion covers the first outlet, the first exhaust port is located on one side of the first guide channel along the radial direction of the first guide channel, the first exhaust port is connected to the first guide channel, and the silencing structure is connected to the first exhaust port and the outlet.

[0007] According to the above technical features, when the gas entering the muffler is mixed with moisture (for ease of description, the gas mixed with moisture is referred to as the mixed fluid), it is guided to the first outlet due to inertia along the extension direction of the first flow channel. There, the mixed fluid collides with the first blocking part, blocking the water in the mixed flow, and some water adheres to the first blocking part. The smaller gas, after colliding with the first blocking part, is turbulently bounced back and flows to other locations, thus separating the gas from the water. Due to the first exhaust port, which is connected to the first flow channel, the separated gas flows out of the first flow channel through the first exhaust port. This blocking component effectively separates the gas and water in the mixed fluid, while the separated gas is not resisted by water droplets adhering to the first blocking part, resulting in lower flow resistance and effectively improving the flow efficiency of the gas within the muffler.

[0008] In one possible embodiment, the inlet and outlet are arranged along the axial direction of the first drainage channel, and the silencing structure is located on the side of the blocking member near the outlet; the blocking member, the housing, and the silencing structure enclose a drainage space, which has a first part and a second part. The first part is located on one side of the first drainage channel along the radial direction of the first drainage channel, and the second part is located between the blocking member and the silencing structure. Both the first exhaust port and the second part are connected to the first part.

[0009] Based on the above technical features, after the gas separated from the mixed fluid is released from the first exhaust port to the first part, it will flow from the first part to the second part. When the gas flows from the narrower first part to the wider second part, the gas velocity decreases, and the sound wave will be reflected at the point of abrupt change in cross-section. Some of the sound energy is reflected back to the source, reducing the noise propagating outward. In this way, the gas can be diverted in the diversion space while reducing the noise of the gas.

[0010] In one possible embodiment, the surface of the first blocking portion facing the first drainage channel includes an inclined drainage surface that covers the first outlet; along the arrangement direction of the first exhaust port pointing towards the first drainage channel, the drainage surface includes a first end and a second end arranged in sequence, and along the axial direction of the first drainage channel, the first end is closer to the first exhaust port than the second end.

[0011] According to the above technical features, when the mixed fluid impacts the first blocking part, the inclined guiding surface will guide the separated gas to the first exhaust port and release it through the first exhaust port, thereby further reducing the flow resistance of the gas separated from the mixed fluid in the first guiding channel.

[0012] In one possible embodiment, the blocking member further includes a second drainage portion connected to the first blocking portion and located within the drainage space. The second drainage portion, the blocking member, and the housing form a first part, and the second drainage portion, the first blocking portion, the silencing structure, and the housing form a second part. The second drainage portion is provided with a second drainage channel that connects the first part and the second part. The silencing structure includes a silencing body and a second blocking portion. The second blocking portion is connected to one side of the silencing body along the radial direction of the first drainage channel, and the port of the second drainage channel that connects to the second part faces the second blocking portion.

[0013] Based on the above technical features, the second flow channel can guide the gas released from the first exhaust port to the second blocking part, and collide with the second blocking part, thereby causing secondary separation of gas and water, and further reducing the water content in the gas.

[0014] In one possible embodiment, along the direction from the first exhaust port to the first drainage channel, the port of the second drainage channel communicating with the first part includes a third end and a fourth end arranged in sequence. Along the axial direction of the first drainage channel, the third end is closer to the inlet than the fourth end.

[0015] Based on the above technical features, the port connecting the second drainage channel and the first part can be oriented towards the first exhaust port. When the first exhaust port releases gas, it can more easily and quickly enter the second drainage channel, further reducing the flow resistance of the gas flowing inside the muffler.

[0016] In one possible embodiment, the blocking member further includes an exhaust section, which is arranged circumferentially with the second drainage section along the first drainage channel. The exhaust section is connected to the first blocking section, and the exhaust section is provided with a second exhaust port, which connects the first part and the second part.

[0017] Based on the above technical features, the exhaust section can assist the first guide section in guiding the gas discharged from the first exhaust port to the first part to the second part, thereby avoiding an increase in flow resistance when all the gas is released from the first guide section.

[0018] In one possible embodiment, the housing includes a first inner wall surface and a second inner wall surface disposed opposite to each other along the arrangement direction of the first exhaust port and the first drainage channel, the first exhaust port facing the first inner wall surface, and a drainage channel defined between the blocking member and the second inner wall surface, the drainage channel communicating with the first drainage channel.

[0019] Based on the above technical features, this configuration can discharge the water that accumulates inside the silencer to the outside of the silencer, thus preventing excessive water accumulation inside the silencer from affecting its noise reduction performance.

[0020] In one possible embodiment, the silencing body is provided with a silencing channel and a silencing hole communicating with the silencing channel. The axial direction of the silencing channel is consistent with the axial direction of the first drainage channel. The silencing hole is located on one radial side of the silencing channel. The second blocking part is located at one end of the silencing channel near the blocking part. The end of the silencing channel away from the blocking part is connected to the outlet. The silencing structure also includes a sound-absorbing part, which is arranged around the silencing body and covers the silencing hole.

[0021] Based on the above technical features, this configuration allows the airflow released from the second drainage channel to more easily enter the silencer channel after colliding with the second blocking part, thereby reducing the flow resistance of the gas in the silencer.

[0022] Secondly, this application provides a silencing device, including the silencer provided in the first aspect of this application.

[0023] Thirdly, this application provides a vehicle that includes the muffler provided in the second aspect of this application. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application will be described below.

[0025] Figure 1 This is a schematic diagram of the structure of the noise reduction device disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the connecting component disclosed in an embodiment of this application; Figure 3 This is a schematic diagram of a muffler explosion disclosed in an embodiment of this application; Figure 4 This is a schematic diagram of the blocking member structure disclosed in an embodiment of this application; Figure 5 This is a first cross-sectional view of the muffler disclosed in an embodiment of this application; Figure 6 For this application Figure 5 The second sectional view of the EE section.

[0026] Explanation of reference numerals in the attached figures: 1. Shell; 101. Inlet; 102. Outlet; 103. First inner wall surface; 104. Second inner wall surface; 2. Silencing structure; 201. Silencing body; 202. Second blocking part; 203. Sound-absorbing component; 204. Third blocking part; 205. Fourth blocking part; 3. Blocking component; 301. First drainage section; 3011. First drainage channel; 3012. First exhaust port; 302. First blocking section; 303. Second drainage section; 3031. Plate; 3032. Pipe; 3033. Second drainage channel; 304. Exhaust section; 3041. Second exhaust port; 305. Drainage groove; 306. Limiting plate; 4. Connecting pipelines; 5. Connecting components; 501. Cathode connection port; 502. Anode gas connection port; 503. Anode liquid connection port; 6. Silencing device; 7. Pump body; 8. Tailpipe; A. Drainage space; A1. First part; A2. Second part; B. Drainage surface; C. Drainage channel; D. Noise reduction channel. Detailed Implementation

[0027] The terms "first," "second," etc., are used for descriptive purposes only and have no sequential or technical meaning, nor should they be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Directional terms used in this application, such as "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," are merely for reference to the orientation shown in the accompanying drawings. The use of directional terms is for better and clearer explanation and understanding of this application, and does not indicate the orientation of the referred device or component in an actual application scenario.

[0028] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the two parts can rotate relative to each other after connection. "Sliding connection" refers to a connection where the two parts can slide relative to each other after connection.

[0029] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0030] The terms "parallel" and "perpendicular" are relative to the current technological level, not absolute mathematical definitions. Slight deviations are permissible; approximations of parallelism or perpendicularity are acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, with the angle between them ranging from 0 to 5 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, with the angle between them ranging from 85 to 95 degrees.

[0031] The term "electrical connection" refers to the flow of current or signal from one conductor to another. An electrical connection between A and B means that current or signal can flow from A to B and vice versa. This connection includes direct and indirect electrical connections. A direct electrical connection between A and B means that A and B are physically connected. An indirect electrical connection between A and B means that A and B are connected via C, where C can be at least one wire or device.

[0032] The embodiments of this application are described below with reference to the accompanying drawings.

[0033] This application provides a vehicle that includes a noise reduction device and a fuel cell. Exemplarily, the vehicle may be a cargo vehicle or a passenger vehicle.

[0034] In some embodiments, the vehicle may include a muffler and a fuel cell, with the muffler connected to the fuel cell's exhaust port. The primary function of the fuel cell is to provide the energy required by the vehicle, while the primary function of the muffler is to exhaust water and a portion of the gas from the cathode and anode inside the fuel cell, and to reduce the noise of the exhaust gas and water from the fuel cell. The components included in the vehicle of this application are not limited to fuel cells and mufflers, and can be selected according to actual conditions such as design and functional requirements.

[0035] In some possible embodiments, a fuel cell can be an electrochemical device that directly converts the chemical energy of fuel (typically hydrogen) and an oxidant (typically oxygen from the air) into electrical energy. The core structure of a fuel cell includes an anode, a cathode, and an intermediate electrolyte membrane. During operation, hydrogen is decomposed into protons and electrons by a catalyst at the anode. The protons pass through the electrolyte membrane to the cathode, while the electrons form an electric current through an external circuit, generating electrical energy. At the cathode, protons and electrons combine with oxygen to produce water and heat. The entire process involves no combustion and has high energy conversion efficiency.

[0036] In some possible embodiments, the fuel cell casing may be provided with an exhaust port, which may include a cathode exhaust port and an anode exhaust port. Both the cathode and anode exhaust ports may be connected to a silencing device, allowing water vapor and liquid water generated during the reaction inside the fuel cell cathode, as well as liquid water, small amounts of hydrogen, and nitrogen gas inside the fuel cell anode, to enter the silencing device and be mixed into a fluid mixture before being discharged. Simultaneously, the silencing device can reduce noise during gas transmission, thereby achieving noise reduction for the fuel cell.

[0037] like Figure 1 and Figure 2 As shown, in some embodiments, the silencing device includes a muffler, the main function of which is to reduce the noise of the gas emitted by the fuel cell, thereby reducing the overall noise of the vehicle and improving the user experience. In some possible embodiments, the silencing device may also include components such as a connecting pipe 4, a connecting component 5, and a silencing device 6. The connecting component can be a multi-port pipe or valve. The connecting component 5 may be provided with a cathode connection port 501, an anode gas connection port 502, an anode liquid connection port 503, and a pipe connection port. The cathode connection port 501 is connected to the cathode discharge port so that the silencing device can receive water and gas from the cathode. The anode gas connection port 502 is connected to the anode gas discharge port, and a hydrogen discharge pump may be provided between the anode gas connection port 502 and the anode gas discharge port to discharge the gas inside the anode. The anode liquid connection port 503 may be connected to the anode liquid discharge port, and a pump body 7 may be provided between the anode liquid connection port 503 and the anode liquid connection port 503. To prevent the water in the pipeline between the anolyte connection 503 and the anolyte connection 503 from freezing in a low-temperature environment, the connector of the pump body 7 can be directly inserted into the silencer. The pump body 7 can be heated by the temperature inside the silencer, thus preventing freezing inside the pump body 7.

[0038] The pipe connection port of connecting component 5 is connected to the muffler 6 via connecting pipe 4. The muffler 6 is used to suppress high-frequency noise and pressure pulses, and typically employs a reactive muffler structure. In some possible embodiments, an expansion chamber can be provided inside the muffler 6, meaning that the outer shell of the muffler 6 has an inlet and an outlet. Multiple silencing spaces are arranged inside the outer shell of the muffler 6 along the direction from the inlet to the outlet. In two adjacent silencing spaces, the size of the silencing space closer to the inlet is smaller than the size of the silencing space closer to the outlet, so that the gas continuously slows down within the muffler 6 to reduce noise at specific frequencies. The muffler 6 is connected to a muffler via connecting pipe 4. The muffler can further reduce mid-to-low frequency noise and handle residual broadband noise. The muffler may be equipped with a tailpipe 8, which communicates with the external environment, allowing the muffler to discharge water and gas emitted from the fuel cell to the outside of the vehicle. This application does not limit the specific structure of the muffler equipment; it can be selected based on cost and design considerations.

[0039] like Figures 3 to 5 As shown, in some embodiments, the muffler includes a housing 1, a silencing structure 2, and a blocking member 3. The main function of the housing 1 is to support and protect the internal components of the muffler, such as the silencing structure 2 and the blocking member 3. The main function of the silencing structure 2 is to reduce noise during the flow and transmission of fuel cell gas. The housing 1 is provided with an inlet 101 and an outlet 102. In some possible embodiments, the outlet of the muffler 6 can be connected to the inlet 101 of the housing 1 through a connecting pipe 4, and the outlet 102 of the housing 1 can be connected to the tailpipe 8. Both the silencing structure 2 and the blocking member 3 are disposed inside the housing 1. For example, the silencing structure 2 can be connected to the inside of the housing 1 by bolts or slots, and the blocking member 3 can also be connected to the inside of the housing 1 by slots or bolts. This application does not limit the connection method between the silencing structure 2 and the housing 1, or the specific connection method between the blocking member 3 and the housing 1, and the choice can be made according to actual conditions such as process and cost.

[0040] The blocking member 3 includes a first diversion part 301 and a first blocking part 302. The first diversion part 301 is provided with a first diversion channel 3011 and a first exhaust port 3012. The first diversion channel 3011 has a first inlet and a first outlet. The first inlet is connected to the inlet 101. In some possible embodiments, the mixed fluid of gas and water can flow into the first inlet through the inlet 101.

[0041] The first blocking part 302 covers the first outlet, and the first exhaust port 3012 is located on one side of the first diversion channel 3011 along the radial direction of the first diversion channel 3011. When the gas entering the muffler is mixed with water (for ease of description, the gas mixed with water is referred to as the mixed fluid), it is diverted to the first outlet along the extension direction of the first diversion channel 3011 due to inertia. The mixed fluid will collide with the first blocking part 302. The water in the mixed fluid will be blocked by the first blocking part 302, and some water will adhere to the first blocking part 302. The gas with smaller mass will collide with the first blocking part 302 and be turbulently bounced back, and flow to other positions, thereby separating the gas and water. Due to the setting of the first exhaust port and the connection between the first exhaust port and the first diversion channel, the separated gas will flow out of the first diversion channel through the first exhaust port 3012. The first exhaust port 3012 is connected to the first flow channel 3011, so that the gas flowing to the first exhaust port 3012 can be directly discharged from the first exhaust port 3012. This arrangement of the blocking member 3 effectively separates the gas and water in the mixed fluid. Simultaneously, the separated gas is not hindered by water droplets adhering to the first blocking part, thus reducing the flow resistance of the separated gas and effectively improving the flow efficiency of the gas within the silencer. The silencing structure 2 connects the first exhaust port 3012 and the outlet 102, so the gas flowing to the first exhaust port 3012 can be discharged from the first exhaust port 3012 into the silencing structure 2 for silencing treatment. Subsequently, the silencing gas is discharged through the silencing structure 2 to the outlet 102 and then transferred from the outlet 102 to the tailpipe 8.

[0042] Meanwhile, the hydrogen discharge pump is activated at fixed time intervals. For example, if the time interval is 5 minutes, the hydrogen discharge pump will activate every 5 minutes, drawing mixed gas from the anode and discharging it into the silencer. Since hydrogen is introduced into the anode, the hydrogen concentration in the mixed fluid inside the silencer increases when the hydrogen discharge pump releases gas. When the hydrogen discharge pump is not activated, the hydrogen concentration in the mixed fluid inside the silencer is lower. When the mixed fluid with a higher hydrogen concentration flows to the first blocking part 302, it is blocked by the first blocking part 302, thus separating the gas with a higher hydrogen concentration. As the gas with a higher hydrogen concentration flows towards the first gas outlet, it mixes with the gas that flowed into the silencer when the hydrogen discharge pump was not activated, thereby reducing the hydrogen concentration inside the gas. Finally, it is discharged from the tailpipe 8. This arrangement ensures that the difference in hydrogen concentration between different time points in the gas discharged from the tailpipe 8 is small, thus avoiding safety issues caused by excessively high hydrogen concentration at any given time.

[0043] For example, the first drainage portion 301 can be a tubular structure, and the inner wall of the tubular structure can form a first drainage channel 3011. Alternatively, the first drainage portion 301 can be a block with a through hole, and the inner wall of the through hole can form the first drainage channel 3011. This application does not limit the specific structure of the first drainage portion 301, and the choice can be made according to actual conditions such as process and cost. For example, the first drainage portion 301 and the first blocking portion 302 can be integrally formed, or they can be welded. This application does not limit the specific structure of the first drainage portion 301 and the first blocking portion 302, and the choice can be made according to actual conditions such as materials and processes.

[0044] like Figures 3 to 5 As shown, in some embodiments, the inlet 101 and the outlet 102 are arranged along the axial direction of the first drainage channel 3011, and the silencing structure 2 is located on the side of the blocking member 3 near the outlet 102. It can be understood that the blocking member 3 and the silencing structure 2 are arranged in sequence along the direction from the inlet 101 to the outlet 102. The blocking member 3, the housing 1, and the silencing structure 2 enclose a drainage space A. The drainage space A has a first part A1 and a second part A2. The first part A1 is located on one side of the first drainage channel 3011 along the radial direction of the first drainage channel 3011. Therefore, the radial dimension of the first part A1 along the first drainage channel 3011 is the distance between the first drainage part 301 and the housing 1. The second part A2 is located between the blocking member 3 and the silencing structure 2. Therefore, the radial dimension of the second part A2 along the first drainage channel 3011 can be the distance between two opposing inner walls of the housing 1 arranged radially along the first drainage channel 3011. Therefore, the radial dimension of the first part A1 along the first drainage channel 3011 is smaller than the radial dimension of the second part A2 along the first drainage channel 3011.

[0045] Both the first exhaust port 3012 and the second part A2 are connected to the first part A1, so that the gas discharged from the first exhaust port 3012 can flow through the first part A1 to the second part A2 along the axial direction of the first drainage channel 3011 and enter the silencing structure 2. After the gas separated from the mixed fluid is released from the first exhaust port 3012 to the first part A1, it will flow from the first part A1 to the second part A2. When the gas flows from the narrower first part A1 to the wider second part A2, the gas velocity decreases, and the sound wave will be reflected at the abrupt change in cross-section. Some of the sound energy is reflected back to the source, reducing the noise propagating outward. In this way, the gas can be drained in the drainage space A while reducing the noise of the gas.

[0046] like Figures 3 to 5As shown, in some embodiments, the surface of the first blocking portion 302 facing the first drainage channel 3011 includes an inclined drainage surface B, which covers the first outlet. In some possible embodiments, the first blocking portion 302 can be a plate-like structure, and the first blocking portion 302 can be inclined relative to the first drainage channel 3011. Simultaneously, the first outlet can also be inclined, so that one side of the plate surface of the first blocking portion 302 can cover the first outlet, and this plate surface can serve as the drainage surface B. In other possible embodiments, the first blocking portion 302 may also have a block-like structure with an inclined surface on one side facing the first drainage channel 3011. This block-like structure can extend into the interior of the first drainage channel 3011. This application does not limit the specific structure of the first blocking portion 302; it can be selected according to design and cost considerations.

[0047] Along the arrangement direction of the first exhaust port 3012 pointing to the first drainage channel 3011, the drainage surface B includes a first end and a second end arranged sequentially. Along the axial direction of the first drainage channel 3011, the first end is closer to the first exhaust port 3012 than the second end. For example, taking the first blocking part 302 as a plate-shaped structure, the first end of the drainage surface B of the first blocking part 302 is closer to the first exhaust port 3012 than the second end, while the second end of the drainage surface B of the first blocking part 302 is closer to the silencing structure 2 than the first end, so that the first blocking part 302 is in an inclined state, thereby making the plate surface of the first blocking part 302 facing the first drainage channel 3011 as the drainage surface B inclined. With this configuration, when the mixed fluid impacts the first blocking part 302, the inclined guiding surface B will guide the separated gas to the first exhaust port 3012 and release it through the first exhaust port 3012, thereby further reducing the flow resistance of the gas separated from the mixed fluid in the first guiding channel 3011.

[0048] In some possible embodiments, when the muffler is installed on the vehicle, the first exhaust port can be positioned upwards. Similarly, the gap between the end face of the first guide portion 301 away from the bottom of the vehicle and the housing 1 can form the first part A1. With this configuration, when the mixed fluid collides with the first blocking portion 302, the gas separated from the mixed fluid can be guided to the first exhaust port 3012 by the guide surface B, while the water, due to its larger mass, will slide downwards along the guide surface B under the action of gravity, so that the separated water gathers at the bottom of the first guide channel 3011. Thus, while achieving the separation of water and gas in the mixed fluid, it also facilitates the collection of the separated water.

[0049] like Figures 3 to 5As shown, in some embodiments, the blocking member 3 further includes a second drainage portion 303, which is connected to the first blocking portion 302 and located within the drainage space A. The second drainage portion 303, the blocking member 3, and the housing 1 form a first part A1. The second drainage portion 303 can divide the drainage space A. In some possible embodiments, the second drainage portion 303 can be disposed on the side of the first blocking portion 302 away from the bottom of the vehicle, so that the second drainage portion 303, the first drainage portion 301, the inner wall of the housing 1 opposite to the second drainage portion 303, and the interior of the housing 1 opposite to the first drainage portion 301 enclose the first part A1. The second drainage portion 303, the first blocking portion 302, the silencing structure 2, and the housing 1 enclose the first part A1. This can be understood as the second drainage portion 303, the first blocking portion 302, the silencing structure 2, and the inner wall of the housing 1 along the direction perpendicular to the axis of the first drainage channel 3011 enclose the second part A2.

[0050] The second drainage section 303 is provided with a second drainage channel 3033, which connects the first part A1 and the second part A2. In some possible embodiments, the second drainage section 303 may be composed of a plate 3031 and a tube 3032. The plate 3031 is connected to the first blocking part 302 to divide the drainage space A into the first part A1 and the second part A2. The tube 3032 may be inserted through the plate 3031 to connect the first part A1 and the second part A2. The inner wall of the tube 3032 may form the second drainage channel 3033. In other possible embodiments, the second drainage section 303 may also be a sealing element with an opening. This application does not limit the specific structure of the second drainage section 303, and it can be selected according to the actual situation such as design and cost.

[0051] The silencing structure 2 includes a silencing body 201 and a second blocking part 202. The main function of the silencing body 201 is to reduce gas noise. The second blocking part 202 is connected to one side of the silencing body 201 along the radial direction of the first drainage channel 3011. In some possible embodiments, the second blocking part 202 may be located on the side of the silencing body 201 away from the bottom of the vehicle. For example, the second blocking part 202 may be a baffle plate or a baffle block. The port of the second drainage channel 3033 communicating with the second part A2 faces the second blocking part 202, so that the second drainage channel 3033 can guide the gas released from the first exhaust port 3012 to the second blocking part 202 and collide with the second blocking part 202, thereby causing secondary separation of gas and water, further reducing the water content in the gas. In other possible embodiments, the second blocking part 202 may be provided with reinforcing ribs to prevent the second blocking part 202 from being damaged by long-term gas impact.

[0052] In some possible embodiments, a limiting plate 306 may be provided on the side of the first blocking part 302 away from the first draining part 301. One end of the limiting plate 306 is connected to the first blocking part 302, and the other end of the limiting plate 306 abuts against the silencing body 201. This can limit the distance between the first blocking part 302 and the second draining part 303 and the silencing structure 2, so as to ensure that the size of the second part A2 is larger than the size of the first part A1.

[0053] like Figures 3 to 5 As shown, in some embodiments, along the direction from the first exhaust port 3012 to the first drainage channel 3011, the port of the second drainage channel 3033 communicating with the first portion A1 includes a third end and a fourth end arranged sequentially. Along the axial direction of the first drainage channel 3011, the third end is closer to the inlet 101 than the fourth end. In some possible embodiments, the third end of the port of the second drainage channel 3033 communicating with the first portion A1 is closer to the inlet 101 than the fourth end, while the fourth end of the port of the second drainage channel 3033 communicating with the first portion A1 is closer to the second blocking portion 202 than the third end. This makes the port of the second drainage channel 3033 communicating with the first portion A1 inclined, allowing the port of the second drainage channel 3033 communicating with the first portion A1 to face the first exhaust port 3012. When the first exhaust port 3012 releases gas, it can more easily and quickly enter the second drainage channel 3033, further reducing the flow resistance of the gas flowing inside the muffler.

[0054] In some possible embodiments, the plate 3031 of the second drainage section 303 may be inclined, and the inclination angle of the plate 3031 may be the same as the inclination angle of the first blocking section 302. The port of the tube 3032 near the inlet 101 may be located on the plate surface of the plate 3031 near the inlet 101, so that the port of the tube 3032 near the inlet 101 faces the first exhaust port 3012. This application does not limit the specific structure of the second drainage section 303, and the choice can be made according to actual conditions such as cost and design.

[0055] like Figure 5 and Figure 6 As shown, in some embodiments, the housing 1 includes a first inner wall surface 103 and a second inner wall surface 104 disposed opposite to each other along the arrangement direction of the first exhaust port 3012 and the first drainage channel 3011. In some possible embodiments, the silencing structure 2 and the blocking member 3 are both located between the first inner wall surface 103 and the second inner wall surface 104. The first inner wall surface 103 may be located on the side of the blocking member 3 away from the bottom of the vehicle, while the second inner wall surface 104 may be located on the side of the blocking member 3 closer to the bottom of the vehicle. The first exhaust port 3012 faces the first inner wall surface 103, that is, the first exhaust port 3012 is located on the side of the first drainage channel 3011 away from the bottom of the vehicle.

[0056] A drainage channel C is defined between the blocking member 3 and the second inner wall surface 104. In some possible embodiments, the blocking member 3 and the second inner wall surface 104 may be spaced apart along the arrangement direction of the first exhaust port 3012 and the first drainage channel 3011, so that the blocking member 3 and the second inner wall surface 104 enclose the drainage channel C. Simultaneously, the silencing body 201 and the second inner wall surface 104 may also be spaced apart along the arrangement direction of the first exhaust port 3012 and the first drainage channel 3011, so that the drainage channel C extends to the outlet 102, thereby allowing the water blocked by the first blocking member 302 to be guided by the drainage channel C to the outlet 102 and discharged outside the silencer. In some possible embodiments, a pipe may also be provided between the blocking member 3 and the second inner wall surface 104 to form the drainage channel C. This application does not limit the specific configuration of the drainage channel C, and it can be selected according to actual conditions such as cost and design.

[0057] The drainage channel C is connected to the first diversion channel 3011. In some possible embodiments, a drainage groove 305 can be opened on the side of the first diversion part 301 near the second inner wall surface 104. The drainage groove 305 is connected to both the first diversion channel 3011 and the drainage channel C. When the mixed fluid flows into the first diversion channel 3011, most of the water can flow directly from the drainage groove 305 into the drainage channel C. The water mist carried in the gas and the water impacted by the first blocking part 302 due to inertial impact will be blocked and slowed down by the first blocking part 302, and then flow from the drainage groove 305 into the drainage channel C. This application does not limit the specific structure of the drainage groove 305 and the drainage channel C, and can be selected according to the actual situation such as design and cost. At the same time, the water intercepted by the second blocking part 202 can flow along the first blocking part 302 and the side wall of the housing 1 through the gap between the blocking member 3 and the silencing structure 2 into the drainage channel C. This arrangement can discharge the water accumulated inside the silencer to the outside of the silencer, avoiding excessive water accumulation inside the silencer and affecting the silencing performance of the silencer.

[0058] like Figures 3 to 6 As shown, in some embodiments, the silencing body 201 is provided with a silencing channel D and a silencing hole communicating with the silencing channel D. The silencing hole is located on one radial side of the silencing channel D. In some possible embodiments, the silencing body 201 can be a silencing tube, and multiple silencing holes can be opened on the inner wall of the silencing tube. The axial direction of the silencing channel D is consistent with the axial direction of the first drainage channel 3011, so that the airflow can enter from one end of the silencing tube and be reflected, interfered with, and resonated within the silencing tube to reduce the noise of the airflow. At the same time, the end of the silencing channel D away from the blocking member 3 is connected to the outlet 102, so that the silencing airflow can be discharged from the outlet 102.

[0059] The end port of the silencing channel D near the blocking member 3 is used to allow the airflow in the second part A2 to flow into the interior of the silencing channel D. The second blocking part 202 is located at the end port of the silencing channel D near the blocking member 3, which allows the second blocking part 202 to be located closer to the air inlet port of the silencing channel D. This arrangement allows the airflow released from the second flow channel 3033 to enter the silencing channel D more easily after colliding with the second blocking part 202, thereby reducing the flow resistance of the gas in the muffler.

[0060] The silencing structure 2 also includes a sound-absorbing component 203, which surrounds the silencing body 201 and covers the silencing holes. For example, the sound-absorbing component 203 can be aluminum silicate fiber cotton, rock wool, or ceramic fiber cotton, etc. This application does not limit the specific type of the sound-absorbing component 203; it can be selected according to silencing requirements and cost considerations. In some possible embodiments, the silencing structure 2 may also include a third blocking part 204, which is connected to the silencing body 201. The third blocking part 204 and the second blocking part 202 can be spaced apart along the axis of the first drainage channel 3011, so that the second blocking part 202, the third blocking part 204, the silencing body 201, and the housing 1 enclose a space for the sound-absorbing component 203, and the sound-absorbing component 203 can be disposed within this space. Since the gas entering the silencing body 201 has been dehydrated by passing through the first blocking part 302 and the second blocking part 202, the sound-absorbing component 203 can be prevented from being wetted by the moisture in the gas, which effectively increases the performance and service life of the sound-absorbing component 203.

[0061] like Figure 4 As shown, in some embodiments, the blocking member 3 further includes an exhaust section 304. The exhaust section 304 and the second drainage section 303 are arranged circumferentially along the first drainage channel 3011. The exhaust section 304 is connected to the first blocking section 302. The exhaust section 304 is provided with a second exhaust port 3041, which connects the first part A1 and the second part A2. With this arrangement, the exhaust section 304 can assist the first drainage section 301 in guiding the gas discharged from the first exhaust port 3012 into the first part A1 to the second part A2, avoiding an increase in flow resistance when all the gas is released from the first drainage section 301. A fourth blocking part 205 can also be provided. The fourth blocking part 205 can be provided on one side of the silencing body 201 along the radial direction of the first drainage channel 3011, and the fourth blocking part 205 can be provided at a distance from the second blocking part 202 along the circumference of the first drainage channel 3011. The second exhaust port 3041 can face the fourth blocking part 205 so that the gas discharged from the second exhaust port 3041 can collide with the fourth blocking part 205 to further separate the gas and water.

[0062] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims. Those skilled in the art can understand that implementing all or part of the processes of the above embodiments and making equivalent changes according to the claims of this application still fall within the scope of this application.

Claims

1. A silencer, characterized in that, include: The shell (1), the sound-absorbing structure (2), and the blocking component (3) are all components of the shell. The housing (1) is provided with an inlet (101) and an outlet (102), and the silencing structure (2) and the blocking member (3) are both provided inside the housing (1); The blocking member (3) includes a first diversion part (301) and a first blocking part (302). The first diversion part (301) is provided with a first diversion channel (3011) and a first exhaust port (3012). The first diversion channel (3011) has a first inlet and a first outlet. The first inlet is connected to the inlet (101). The first blocking part (302) covers the first outlet. The first exhaust port (3012) is located on one side of the first diversion channel (3011) along the radial direction of the first diversion channel (3011). The first exhaust port (3012) is connected to the first diversion channel (3011). The silencing structure (2) connects the first exhaust port (3012) and the outlet (102).

2. The silencer according to claim 1, characterized in that, The inlet (101) and the outlet (102) are arranged along the axial direction of the first drainage channel (3011), and the silencing structure (2) is located on the side of the blocking member (3) near the outlet (102); The blocking member (3), the housing (1), and the silencing structure (2) enclose a drainage space (A). The drainage space (A) has a first part (A1) and a second part (A2). The first part (A1) is located on one side of the first drainage channel (3011) along the radial direction of the first drainage channel (3011). The second part (A2) is located between the blocking member (3) and the silencing structure (2). The first exhaust port (3012) and the second part (A2) are both connected to the first part (A1).

3. The silencer according to claim 1, characterized in that, The surface of the first blocking part (302) facing the first drainage channel (3011) includes an inclined drainage surface (B), which covers the first outlet; along the arrangement direction of the first exhaust port (3012) pointing to the first drainage channel (3011), the drainage surface (B) includes a first end and a second end arranged in sequence, and along the axial direction of the first drainage channel (3011), the first end is closer to the first exhaust port (3012) than the second end.

4. The silencer according to claim 2, characterized in that, The blocking member (3) further includes a second drainage part (303), which is connected to the first blocking part (302) and is located in the drainage space (A). The second drainage part (303), the blocking member (3), and the housing (1) form the first part (A1), and the second drainage part (303), the first blocking part (302), the sound-absorbing structure (2), and the housing (1) form the second part (A2). The second drainage section (303) is provided with a second drainage channel (3033), which connects the first part (A1) and the second part (A2); The noise reduction structure (2) includes a noise reduction body (201) and a second blocking part (202). The second blocking part (202) is connected to one side of the noise reduction body (201) along the radial direction of the first drainage channel (3011). The port of the second drainage channel (3033) communicating with the second part (A2) faces the second blocking part (202).

5. The silencer according to claim 4, characterized in that, Along the direction from the first exhaust port (3012) to the first drainage channel (3011), the port of the second drainage channel (3033) that communicates with the first part (A1) includes a third end and a fourth end arranged in sequence. Along the axial direction of the first drainage channel (3011), the third end is closer to the inlet (101) than the fourth end.

6. The silencer according to claim 4, characterized in that, The blocking member (3) further includes an exhaust section (304), which is arranged circumferentially with the second drainage section (303) along the first drainage channel (3011). The exhaust section (304) is connected to the first blocking section (302). The exhaust section (304) is provided with a second exhaust port (3041), which connects the first part (A1) and the second part (A2).

7. The silencer according to any one of claims 1-6, characterized in that, The housing (1) includes a first inner wall surface (103) and a second inner wall surface (104) arranged opposite to each other along the arrangement direction of the first exhaust port (3012) and the first drainage channel (3011). The first exhaust port (3012) faces the first inner wall surface (103). A drainage channel (C) is defined between the blocking member (3) and the second inner wall surface (104). The drainage channel (C) communicates with the first drainage channel (3011).

8. The silencer according to claim 4, characterized in that, The silencing body (201) is provided with a silencing channel (D) and a silencing hole communicating with the silencing channel (D). The axial direction of the silencing channel (D) is consistent with the axial direction of the first drainage channel (3011). The silencing hole is located on one side of the radial direction of the silencing channel (D). The second blocking part (202) is located at one end of the silencing channel (D) near the blocking member (3). The end of the silencing channel (D) away from the blocking member (3) is connected to the outlet (102). The silencing structure (2) further includes a sound-absorbing component (203), which is arranged around the silencing body (201) and covers the silencing hole.

9. A noise reduction device, characterized in that, Includes the silencer as described in any one of claims 1-8.

10. A vehicle, characterized in that, It includes a fuel cell and the silencing device as described in claim 9, wherein the silencing device is connected to the exhaust port of the fuel cell.

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