Exhaust integrated device and hydrogen fuel cell system having the same

Abstract

This invention discloses an integrated exhaust device and a hydrogen fuel cell system having the same. The integrated exhaust device includes a cylinder, an inlet pipe assembly, a hydrogen conduit, and an outlet pipe assembly. The inlet pipe assembly includes an inlet port pipe and multiple first partitions, with the multiple first partitions sleeved on the inlet port pipe. A first chamber is formed between the inlet end cap and the first partitions, and a second chamber is formed between two adjacent first partitions. A first through hole is provided on the inlet port pipe. The outlet end of the hydrogen conduit extends axially into at least one of the second chambers. A second through hole is provided on the hydrogen conduit. The outlet pipe assembly includes an outlet port pipe, with the inlet end of the outlet port pipe spaced apart from the outlet end of the inlet port pipe. The outlet end of the outlet port pipe is installed at the outlet. The integrated exhaust device can effectively dilute the hydrogen concentration in the exhaust gas and improve the separation effect of steam and water while ensuring noise reduction.

Description

Technical Field

[0001] This invention relates to the field of fuel cells, and more particularly to an exhaust gas integration device and a hydrogen fuel cell system having the same. Background Technology

[0002] A hydrogen fuel cell is a device that generates electricity by reacting hydrogen and oxygen from the air within a fuel cell stack; its essence is an electrochemical reaction. The fuel is hydrogen and oxygen from the air. The air side involved in the reaction is called the cathode side, and the hydrogen side is called the anode side. The only emission is water. Hydrogen energy is considered one of the ultimate clean energy sources for mankind. However, hydrogen fuel cells not only generate exhaust noise, but the water produced can easily be released into the external environment. Furthermore, the exhaust gas contains a certain amount of hydrogen, and the high hydrogen content can easily lead to safety hazards. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide an integrated exhaust device that can, while ensuring noise reduction, effectively dilute the hydrogen concentration in the exhaust gas and improve the separation effect of steam and water.

[0004] An exhaust gas integration device according to an embodiment of the present invention is used in a hydrogen fuel cell system. The exhaust gas integration device includes: a cylindrical body, the cylindrical body including a pipe body and an inlet end cap and an outlet end cap located at both ends of the pipe body, the inlet end cap having a first inlet and a second inlet, and the outlet end cap having an outlet; an intake pipe assembly, the intake pipe assembly including an intake port pipe and a plurality of first baffles, the inlet end of the intake port pipe being installed at the first inlet, the outlet end of the intake port pipe extending into the pipe body, and the plurality of first baffles being sleeved on the intake port pipe, the intake... A first chamber is formed between the end cap and the first partition, and a second chamber is formed between two adjacent first partitions. A first through hole is provided on the air inlet pipe. A hydrogen conduit is provided, with its inlet end installed at the second air inlet and its outlet end extending axially into at least one second chamber. A second through hole is provided on the hydrogen conduit. An exhaust pipe assembly is provided, including an exhaust port pipe, with its inlet end spaced apart from the outlet end of the air inlet pipe and its outlet end installed at the air outlet.

[0005] According to the exhaust integrated device of the present invention, by placing both the inlet pipe and the hydrogen conduit within the same pipe body, the exhaust gas in the hydrogen conduit and the exhaust gas in the inlet pipe can be better mixed, effectively diluting the hydrogen and preventing safety hazards caused by excessively high hydrogen concentration in the exhaust. By sleeved with multiple first baffles on the inlet pipe, a Helmholtz resonant cavity can be effectively constructed to effectively eliminate noise. By separating the inlet pipe and the outlet pipe, the airflow within the pipe body can be effectively interrupted, reducing the direct discharge of vaporized and liquid water, thereby improving the separation of vapor and water. Therefore, the exhaust integrated device of this application can effectively dilute the hydrogen concentration in the exhaust gas and improve the separation of vapor and water while ensuring noise reduction.

[0006] In addition, the exhaust integrated device of the present invention may also have the following additional technical features:

[0007] In some embodiments of the present invention, the air intake pipe assembly further includes: a blocking plate, the blocking plate being installed at the outlet end of the air intake pipe to block the air outlet of the air intake pipe; a second partition plate, the second partition plate being sleeved on the outlet end of the air intake pipe, a third chamber being formed between the first partition plate and the second partition plate, and a third through hole being provided on the second partition plate.

[0008] Optionally, the air outlet pipe assembly further includes a third partition, which is sleeved over the air inlet end of the air outlet pipe, and a fourth chamber is formed between the third partition and the second partition.

[0009] Optionally, a fifth chamber is constructed between the third partition and the vent end cap, and a fourth through hole is provided on the vent pipe in the fifth chamber.

[0010] Optionally, the first partition, the second partition, and the third partition are all provided with drainage grooves, and the exhaust integrated device further includes a drain pipe, which is connected to the drainage groove.

[0011] Optionally, the drain pipe is disposed between the second partition and the third partition, and / or, the drain pipe is disposed between the third partition and the vent cap.

[0012] In some embodiments of the present invention, the number of first through holes in a plurality of second chambers gradually increases in the direction from the inlet end of the air inlet pipe to the outlet end of the air inlet pipe.

[0013] Optionally, the number of first through holes in the first chamber is less than the number of first through holes in the second chamber.

[0014] In some embodiments of the present invention, three first partitions are provided, and the three first partitions are evenly spaced apart along the axial direction.

[0015] The present invention also proposes a hydrogen fuel cell system having the exhaust gas integration device described in the above embodiments.

[0016] According to the present invention, the hydrogen fuel cell system can effectively reduce the hydrogen content emitted by the hydrogen fuel cell system by providing the exhaust integration device of the above embodiment, and improve the gas-water separation effect while eliminating noise.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of the exhaust integrated device according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the hydrogen conduit of the exhaust integrated device according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the drain pipe of the exhaust integrated device according to an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the first partition of the exhaust integrated device according to an embodiment of the present invention, which is not in conjunction with the hydrogen duct.

[0023] Figure 5 This is a schematic diagram of the structure of the first partition plate of the exhaust integrated device according to an embodiment of the present invention, which is used in conjunction with the hydrogen duct.

[0024] Figure label:

[0025] Exhaust integrated device 100

[0026] Pipe body 11, Inlet end cap 12, Outlet end cap 13

[0027] Air inlet pipe 21, first baffle 22, second baffle 23, blocking plate 24

[0028] Hydrogen conduit 31

[0029] Vent pipe 41, third partition 42

[0030] First chamber 51, Second chamber 52, Third chamber 53, Fourth chamber 54, Fifth chamber 55

[0031] First through hole 61, second through hole 62, third through hole 62, fourth through hole 64

[0032] Drainage channel 71, drainage pipe 72. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] The following is for reference. Figures 1-5 An exhaust integrated device 100 according to an embodiment of the present invention is described.

[0037] The exhaust gas integration device 100 according to an embodiment of the present invention is used in a hydrogen fuel cell system. The hydrogen fuel cell system includes a hydrogen fuel cell, which is described here. A hydrogen fuel cell is a device that generates electricity by reacting hydrogen and oxygen from the air within a fuel cell stack; its essence is an electrochemical reaction. The fuel is hydrogen and oxygen from the air. The air side participating in the reaction is called the cathode side, and the hydrogen side participating in the reaction is called the anode side. The only emission is water. Hydrogen energy is considered one of the ultimate clean energy sources for mankind and is a major strategic direction for the energy structure transformation of various countries. For the exhaust gas system of the hydrogen fuel cell cathode, due to its special characteristics, its design often needs to consider functions such as noise reduction, gas-water separation, and drainage. In some cases, it also needs to have a water storage function to meet specific needs.

[0038] Fuel cell exhaust noise, as one of the main noise sources in the fuel cell stack system, differs from the exhaust noise characteristics of traditional gasoline vehicles. Hydrogen fuel cell exhaust noise generally lacks order and is primarily broadband, high-frequency airflow noise. Therefore, the design of hydrogen fuel cell exhaust systems must differ from that of traditional gasoline vehicles. Currently, the main problem is insufficient research on hydrogen fuel cell exhaust noise. The silencing frequency of the muffler is mismatched with the exhaust noise source frequency, resulting in poor silencing effects and an inability to effectively reduce exhaust noise. Some manufacturers even choose not to install exhaust mufflers. During operation, hydrogen fuel cells require maintaining high pressure within the stack, primarily controlled by the exhaust back pressure valve on the cathode side. Airflow through the valve generates flow noise, especially under high-power, high-load conditions requiring large flow rates and high stack pressure. At this time, the exhaust back pressure valve opening is very small, resulting in very high airflow velocity and making the high-frequency, broadband airflow noise very noticeable, typically exceeding 120dB. Subjectively, the sound is harsh and unbearable.

[0039] During operation, a small amount of vaporized water and nitrogen diffuses back from the cathode side to the anode side within the hydrogen fuel cell stack. Depending on the hydrogen concentration, the anode side requires periodic, intermittent exhaust gas discharge. Unreacted hydrogen is also discharged along with vaporized and liquid water, as well as small amounts of impurity gases. Hydrogen can explode at a certain concentration in air. To prevent the discharged hydrogen from reaching an explosive concentration (generally less than 4%), the hydrogen-containing exhaust gas must be diluted before release.

[0040] Furthermore, when hydrogen fuel cells are operating, the cathode-side emissions mainly consist of air, steam, liquid water, and a small amount of hydrogen. Generally, the water in the emissions needs to be separated for centralized discharge or stored and collected for secondary use. This necessitates the design of a steam-water separation structure to separate the water. Designing a separate steam-water separation structure requires additional water separation components, increasing costs. Many manufacturers, in an effort to save costs, even omit steam-water separation altogether, directly discharging the water from the exhaust gas into the external environment. This not only wastes water but also, in cold winter conditions, can cause roads to freeze, increasing the risk of traffic accidents.

[0041] The exhaust gas integrated device 100 of this application integrates the gas-water separation function into the muffler by utilizing the muffler's acoustic structure, without adding a separate gas-water separation device. It also integrates the hydrogen dilution function and the gas-water separation function into the muffler's noise reduction structure. This improves system reliability, reduces costs, saves space, and facilitates exhaust system installation. The following description uses the application of the exhaust gas integrated device 100 in a hydrogen fuel cell system as an example. However, it should be noted that the exhaust gas integrated device 100 can be applied not only to hydrogen fuel cell systems but also to other environments requiring the mixing of two gases (e.g., hydrogen and exhaust gas) and the separation of water from these gases. Therefore, this application does not limit the application environment or equipment of the exhaust gas integrated device 100.

[0042] like Figure 1 As shown, the exhaust integrated device 100 according to an embodiment of the present invention includes a cylinder, an intake pipe assembly, a hydrogen conduit 31, and an exhaust pipe assembly. The cylinder includes a pipe body 11 and an intake end cap 12 and an exhaust end cap 13 located at both ends of the pipe body 11. The intake end cap 12 has a first intake port and a second intake port, and the exhaust end cap 13 has an exhaust port. The intake pipe assembly includes an intake port pipe 21 and a plurality of first baffles 22. The inlet end of the intake port pipe 21 is installed at the first intake port, and the outlet end of the intake port pipe 21 extends into the pipe body 11. The plurality of first baffles 22 are sleeved on the intake port pipe 21. A first chamber 51 is formed between the air inlet end cap 12 and the first partition 22, and a second chamber 52 is formed between two adjacent first partitions 22. A first through hole 61 is provided on the air inlet pipe 21. The inlet end of the hydrogen conduit 31 is installed at the second air inlet. The outlet end of the hydrogen conduit 31 extends axially into at least one second chamber 52. A second through hole 62 is provided on the hydrogen conduit 31. The exhaust pipe assembly includes an exhaust pipe 41. The inlet end of the exhaust pipe 41 is spaced apart from the outlet end of the air inlet pipe 21. The outlet end of the exhaust pipe 41 is installed at the exhaust port.

[0043] Further combine with the appendix Figure 1In a specific example, the inlet end of the air inlet pipe 21 is connected to the cathode pipe of the hydrogen fuel cell system, thereby allowing the exhaust gas (containing air, water vapor, liquid water, and a small amount of hydrogen) in the cathode pipe to enter the air inlet pipe 21. The inlet end of the hydrogen conduit 31 is connected to the anode pipe of the hydrogen fuel cell system, allowing the exhaust gas (containing hydrogen) in the anode pipe to enter the hydrogen conduit 31. The exhaust gas in the hydrogen conduit 31 can enter the first chamber 51 or the second chamber 52 through the second through hole 62, and the exhaust gas in the air inlet pipe 21 can enter the first chamber 51 or the second chamber 52 through the first through hole 61. Within the second chamber 52, the exhaust gas in the hydrogen conduit 31 and the exhaust gas in the inlet pipe 21 can be better mixed. In addition, the first chamber 51 and at least one second chamber 52 are perforated resonant cavities, employing the principle of reactive noise reduction. Based on the Helmholtz resonance principle, the noise reduction frequency of each chamber is controlled by designing the wall thickness of the inlet pipe 21 and the number of noise reduction holes (i.e., first through holes 61) arranged in the first chamber 51 and at least one second chamber 52. This allows the noise reduction frequency of each chamber to increase sequentially along the axial direction (i.e., from left to right), effectively eliminating frequencies below 2500Hz.

[0044] In addition, the air inlet pipe 21 and the air outlet pipe 41 are spaced apart in this application, which can effectively interrupt the airflow in the pipe body 11, reduce the direct discharge of vapor water and liquid water, and thus improve the separation effect of vapor and water.

[0045] According to an embodiment of the present invention, the exhaust integrated device 100, by arranging both the inlet pipe 21 and the hydrogen conduit 31 within the same pipe body 11, allows for better mixing of the exhaust gas in the hydrogen conduit 31 and the exhaust gas in the inlet pipe 21. This effectively dilutes the hydrogen and prevents excessively high hydrogen concentrations from causing safety hazards. By sleeved with multiple first baffles 22 on the inlet pipe 21, a Helmholtz resonance cavity can be effectively constructed to effectively eliminate noise. By separating the inlet pipe 21 and the outlet pipe 41, the airflow within the pipe body 11 can be effectively interrupted, reducing the direct discharge of vaporized and liquid water, thereby improving the separation of vapor and water. Therefore, the exhaust integrated device 100 of this application can effectively dilute the hydrogen concentration in the exhaust gas and improve the separation of vapor and water while ensuring noise reduction.

[0046] In some embodiments of the present invention, the intake pipe assembly further includes a blocking plate 24 and a second partition plate 23. The blocking plate 24 is installed at the outlet end of the intake pipe 21 to block the outlet of the intake pipe 21. The second partition plate 23 is sleeved on the outlet end of the intake pipe 21. A third chamber 53 is formed between the first partition plate 22 and the second partition plate 23. A third through hole 63 is provided on the second partition plate 23. (See attached drawing) Figure 1As shown, the installation of the blocking plate 24 at the outlet of the air inlet pipe 21 can effectively change the direction of airflow, ensuring that all gas in the air inlet pipe 21 is discharged from the first through hole 61 to the third chamber 53, and then flows from the third through hole 63 to the outlet. This further improves the steam-water separation effect. Specifically, steam-water separation can be divided into four processes: First, due to the blocking effect of the blocking plate 24, some steam and water are separated from the gas entering the air inlet pipe 21; second, due to the blocking effect, some steam and water are separated from the gas as it passes through the first through hole 61 of the third chamber 53; third, the gas entering the third chamber 53 is directly sprayed onto the inner surface of the cylinder, and because the cylinder and the external environment continuously exchange heat, the temperature will be lower than the exhaust temperature, so some moisture in the gas will also be released, achieving the effect of steam-water separation; fourth, some steam and water are separated as the gas passes through the third through hole 63, thus separating a large amount of steam and water in this process.

[0047] Optionally, refer to the appendix. Figure 1 As shown, the vent pipe assembly also includes a third baffle 42, which is sleeved over the air inlet end of the vent pipe 41. A fourth chamber 54 is constructed between the third baffle 42 and the second baffle 23. Thus, when the gas passes through the third through hole 63, a portion of it can be sprayed onto the third baffle 42, thereby further separating the steam and water. Then, the gas is bent radially along the pipe body 11 to enter the vent pipe 41 from the air inlet. Since a closed fourth chamber 54 is constructed between the third baffle 42 and the vent end cap 13, a portion of the gas can pass through the third through hole 63 into the fourth chamber 54 for further separation of steam and water. After the above-mentioned layers of steam and water separation, the gas can be discharged from the vent pipe outlet of the vent pipe 41.

[0048] Further, see Appendix Figure 1 As shown, a fifth chamber 55 is constructed between the third partition 42 and the gas outlet cap 13. A fourth through hole 64 is provided on the gas outlet pipe 41 in the fifth chamber 55. Thus, the gas entering the gas outlet pipe 41 can also pass through the fourth through hole 64 into the fifth chamber 55, thereby further increasing the gas flow path and further realizing the separation of steam and water.

[0049] In addition, it should be noted that the above process involves not only the separation of the soda and water, but also the thorough mixing of hydrogen to achieve sufficient dilution of the hydrogen, thereby allowing the uniformly diluted exhaust gas to be discharged, which can further reduce the hydrogen content in the exhaust gas.

[0050] In some embodiments of the present invention, reference is made to the appendix. Figure 1 , Figure 4 and Figure 5As shown, the first partition 22, the second partition 23 and the third partition 42 are all provided with drainage grooves 71. The exhaust integrated device 100 also includes a drain pipe 72, which is connected to the drainage groove 71. Thus, when the steam and water are separated, the liquid water collects in the pipe body 11 and can then pass through the drainage groove 71 and finally be discharged from the drain pipe 72. The structure is simple and the drainage effect is good.

[0051] Optionally, the drain pipe 72 is disposed between the second partition 23 and the third partition 42, and / or, the drain pipe 72 is disposed between the third partition 42 and the vent end cap 13. (See attached diagram) Figure 1 As shown in a specific example, there are two drain pipes 72. One drain pipe 72 is located between the second partition 23 and the third partition 42, and the other drain pipe 72 is located between the third partition 42 and the vent end cap 13. This not only allows for better drainage of the collected water, but also reduces the number of drain pipes 72.

[0052] Optionally, in the direction from the inlet end to the outlet end of the air inlet pipe 21, the number of first through holes 61 in the plurality of second chambers 52 gradually increases, thereby, referring to the attached... Figure 1 As shown, the silencing frequencies of the multiple second chambers 52 increase sequentially from left to right, which can improve the silencing effect.

[0053] Optionally, the number of first through holes 61 in the first chamber 51 is less than the number of first through holes 61 in the second chamber 52. This allows for the layering of noise reduction frequencies to further improve the noise reduction effect.

[0054] Among them, reference appendix Figure 1 As shown, it should also be noted that the first chamber 51 has one, the second chamber 52 has two, the number of first through holes 61 in the third chamber 53 is unrelated to the number of first through holes 61 in the first chamber 51, and the number of first through holes 61 in the third chamber is unrelated to the number of first through holes 61 in the second chamber 52. The number of first through holes 61 in the third chamber 53 is not only to satisfy the airflow function, but also to adjust the back pressure. That is, under the premise of satisfying the back pressure, the number of first through holes 61 in the third chamber 53 can be freely designed and is not restricted here.

[0055] Furthermore, the number of fourth through holes 64 in the fifth chamber 55 is mainly for eliminating high-frequency noise. Generally, more fourth through holes 64 are designed, and the more fourth through holes 64 there are, the better the effect of eliminating high-frequency noise.

[0056] This application does not impose any restrictions on the lengths of the first chamber 51, the second chamber 52, the third chamber 53, the fourth chamber 54, and the fifth chamber 55. They can be freely designed according to the silencing frequency. The length of the third chamber 53 can be designed according to the back pressure requirements. That is, if a lower back pressure is required, the third chamber 53 can be made longer, or more first through holes 61 can be designed. If a higher back pressure is required, the third chamber 53 can be made shorter, or fewer first through holes 61 can be designed.

[0057] In some embodiments of the present invention, three first partitions 22 are provided, and the three first partitions 22 are evenly spaced apart along the axial direction, thereby better controlling the noise reduction frequency.

[0058] The present invention also proposes a hydrogen fuel cell system having the exhaust gas integration device 100 of the above embodiments.

[0059] According to the present invention, by providing the exhaust integration device 100 of the above embodiment, the hydrogen content emitted by the hydrogen fuel cell system can be effectively reduced, and the effect of gas-water separation can be improved while eliminating noise.

[0060] Other configurations and operations of the hydrogen fuel cell system and exhaust integration device 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0061] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An integrated exhaust device for a hydrogen fuel cell system, characterized in that, include: The cylinder includes a tube (11) and an air inlet cap (12) and an air outlet cap (13) located at both ends of the tube (11). The air inlet cap (12) has a first air inlet and a second air inlet, and the air outlet cap (13) has an air outlet. An air intake pipe assembly includes an air intake pipe (21) and a plurality of first partitions (22). The inlet end of the air intake pipe (21) is installed at the first air inlet, and the outlet end of the air intake pipe (21) extends into the pipe body (11). A plurality of first partitions (22) are sleeved on the air intake pipe (21). A first chamber (51) is formed between the air intake end cap (12) and the first partitions (22). A second chamber (52) is formed between two adjacent first partitions (22). A first through hole (61) is provided on the air intake pipe (21). Hydrogen conduit (31), the inlet end of the hydrogen conduit (31) is installed in the second gas inlet, the outlet end of the hydrogen conduit (31) extends axially into at least one second chamber (52), and the hydrogen conduit (31) is provided with a second through hole (62); An exhaust pipe assembly, comprising an exhaust port pipe (41), wherein the inlet end of the exhaust port pipe (41) is spaced apart from the outlet end of the intake port pipe (21), and the outlet end of the exhaust port pipe (41) is installed at the exhaust port; the intake pipe assembly further comprises: A blocking plate (24) is installed at the outlet end of the air inlet pipe (21) to block the air outlet of the air inlet pipe (21); The second partition (23) is sleeved on the outlet end of the air inlet pipe (21). A third chamber (53) is formed between the first partition (22) and the second partition (23). A third through hole (63) is provided on the second partition (23). The installation of the blocking plate (24) at the outlet of the air inlet pipe (21) can change the direction of airflow, so that the gas in the air inlet pipe (21) is discharged from the first through hole (61) to the third chamber (53), and then flows from the third through hole (63) to the outlet.

2. The exhaust system according to claim 1, characterized in that, The air outlet pipe assembly also includes a third partition (42), which is sleeved on the air inlet end of the air outlet pipe (41), and a fourth chamber (54) is formed between the third partition (42) and the second partition (23).

3. The exhaust system according to claim 2, characterized in that, A fifth chamber (55) is constructed between the third partition (42) and the vent end cap (13), and a fourth through hole (64) is provided on the vent pipe (41) in the fifth chamber (55).

4. The exhaust system according to claim 3, characterized in that, The first partition (22), the second partition (23) and the third partition (42) are all provided with drainage grooves (71), and the exhaust integrated device also includes a drain pipe (72), which is connected to the drainage groove (71).

5. The exhaust system according to claim 4, characterized in that, The drain pipe (72) is disposed between the second partition (23) and the third partition (42), and / or the drain pipe (72) is disposed between the third partition (42) and the vent cap (13).

6. The exhaust system according to claim 1, characterized in that, In the direction from the inlet end of the air inlet pipe (21) to the outlet end of the air inlet pipe (21), the number of the first through holes (61) in the plurality of second chambers (52) gradually increases.

7. The exhaust system according to claim 1, characterized in that, The number of first through holes (61) in the first chamber (51) is less than the number of first through holes (61) in the second chamber (52).

8. The exhaust system according to claim 1, characterized in that, There are three first partitions (22), and the three first partitions (22) are evenly spaced apart along the axial direction.

9. A hydrogen fuel cell system, characterized in that, The exhaust integrated device includes any one of claims 1-8.

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