A fuel cell hydrogen exhaust device

Abstract

The present invention discloses a fuel cell hydrogen exhaust device, comprising an air guide cylinder, a mixing cylinder connected to one end of the air guide cylinder, a preliminary filter cylinder connected to one end of the mixing cylinder through a first connecting pipe, and a hydrogen purification collection cylinder connected to one end of the preliminary filter cylinder through a second connecting pipe; one side of the air guide cylinder is connected with an air guide pipe, and relates to the technical field of fuel cells. The present invention can drive the gas inside the air guide cylinder and the mixing cylinder to mix through the cooperation between the air guide pipe, a rotating rod and a stirring blade, thereby reducing the overall hydrogen concentration, avoiding the problem of excessively high hydrogen concentration in a local area, preventing the generation of high-concentration hydrogen at the exhaust port, and improving safety; and gas will only be generated when a hydrogen fuel cell vehicle is running, that is, when there is gas flowing in the air guide pipe, the rotating impeller will be driven to rotate, which replaces the transmission through a fan or other driving device to drive the rotating impeller to work, saving costs.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a hydrogen exhaust device for a fuel cell. Background Art

[0002] The working principle of fuel cell vehicles is that hydrogen as fuel undergoes a redox chemical reaction with oxygen in the atmosphere in the fuel cell carried by the vehicle, generating electricity to drive the motor, which in turn drives the mechanical transmission structure in the vehicle, and then drives the front axle (or rear axle) and other walking mechanical structures of the vehicle to work, thereby driving the electric vehicle forward. The core component is the fuel cell. The reaction of the fuel cell will produce very little carbon dioxide and nitrogen oxides, and the byproduct is mainly water, so it is called a green new environmentally friendly vehicle.

[0003] A Chinese patent has disclosed a hydrogen fuel cell vehicle exhaust device (202010729090.3), comprising a cylinder and a connecting pipe fixed at the middle position of the left end of the cylinder, a conical cover arranged larger on the left and smaller on the right is provided at the right end of the cylinder, a fixing ring is provided on the annular outer side of the cylinder, the left end of the conical cover is threadedly connected to the fixing ring, at least two fixing plates are equidistantly fixed between the fixing ring and the left part of the cylinder, the middle position inside the cylinder is rotatably connected to the main shaft arranged on the left and right, fixed covers are provided at both left and right ends of the main shaft, and the two fixed covers are respectively arranged inside the cylinder and inside the conical cover, and at least four fan blades are equidistantly fixedly connected to the annular outer end of the fixing cover. Compared with the prior art, the present invention has the following beneficial effects: hydrogen and water vapor in the exhaust gas are evenly mixed through the fan blades, and the exhaust gas is also mixed with the outside air, thereby reducing the hydrogen concentration in the exhaust gas, preventing the generation of high-concentration hydrogen at the exhaust port, and improving safety.

[0004] A Chinese patent has disclosed a hydrogen fuel cell vehicle exhaust mixing device (201910294265.X), including a connecting pipe, one end of which is connected to one end of a hydrogen mixer, and the other end of the hydrogen mixer is connected to an exhaust tail pipe; the hydrogen mixer includes an outer cylinder, a shunt pipe is arranged in the middle of the outer cylinder, a front fixing ring is arranged in one end of the shunt pipe, a rear fixing ring is arranged in the other end of the shunt pipe, a front swirl blade is arranged in the front fixing ring, and a rear swirl blade is arranged in the rear fixing ring, one end of the outer cylinder and one end of the front fixing ring are connected to the front end cover, and the other end of the outer cylinder and the other end of the rear fixing ring are connected to the rear end cover. The present invention adds a hydrogen mixing device, which can evenly mix hydrogen and water vapor when the exhaust gas is discharged, thereby reducing the overall hydrogen concentration; the hydrogen mixing device adopts a double swirl blade structure, which has a stronger mixing ability and produces a more obvious swirl effect; the present invention can use a lightweight plastic material to reduce the cost of the exhaust device. Summary of the invention

[0005] The present invention proposes a fuel cell hydrogen exhaust device to solve the problem that in order to reduce the excessive hydrogen in a local area of ​​the exhaust pipe, a driving unit and a mixing mechanism are needed to drive the gas inside the exhaust pipe to mix, resulting in excessively high exhaust costs and the inability to collect the exhausted gas.

[0006] Specifically, the present invention provides a fuel cell hydrogen exhaust device, comprising an air guide cylinder, a mixing cylinder connected to one end of the air guide cylinder, a preliminary filter cylinder connected to one end of the mixing cylinder through a first connecting pipe, and a hydrogen purification collection cylinder connected to one end of the preliminary filter cylinder through a second connecting pipe;

[0007] One side of the air guide cylinder is connected to an air guide pipe, and a rotating mechanism is provided between the air guide cylinder and the mixing cylinder, wherein the rotating mechanism comprises a rotating rod rotating at the center of the inner wall of the air guide cylinder and one end of which extends into the mixing cylinder, a rotating impeller fixed outside the rotating rod and located inside the air guide cylinder, and a stirring blade fixed outside the rotating rod and located inside the mixing cylinder;

[0008] The airflow generated during the driving of the hydrogen fuel cell vehicle enters the air cylinder through the air duct, and then enters the mixing cylinder from the air cylinder for mixing. In the process of the gas entering the air cylinder from the air duct, the rotating impeller is driven to rotate, thereby driving the rotating rod to rotate, and the rotating rod drives the stirring blade to rotate. The connecting end of the air duct and the air cylinder is located at the lower end of the center of the air cylinder, ensuring that the air outlet end of the air duct blows toward the lower end of one side of the rotating impeller. When gas is blown into the air duct, the rotating impeller can be driven to rotate.

[0009] Preferably, a buffer ventilation plate is provided on the outer surface of the rotating rod and between the gas guide cylinder and the mixing cylinder, the area between the buffer ventilation plate and the rotating impeller is the area with the highest gas concentration, a hydrogen density detector is provided on one side of the inner wall of the gas guide cylinder, the top of the gas guide cylinder is connected to a balance pipe, and an electric gas control valve is provided on the balance pipe.

[0010] Preferably, the air guide cylinder and the mixing cylinder are both configured to be cylindrical, the cross-sectional radius of the mixing cylinder is larger than the cross-sectional radius of the air guide cylinder, and the inner cavity of the mixing cylinder is configured to be conical, and the size of the inner cavity of the mixing cylinder gradually increases from one end close to the air guide cylinder to the end away from the air guide cylinder.

[0011] Preferably, a fixing sleeve is provided on the outer surface of the rotating rod, and two ends of the fixing sleeve are respectively connected to two sides of the inner wall of the mixing barrel, and the rotating rod is rotatably connected to the center of the fixing sleeve.

[0012] Preferably, the interior of the preliminary filter cartridge is filled with a condensation breathable layer, a plurality of breathable holes are evenly opened on the condensation breathable layer, and the material of the condensation breathable layer is a transparent heat-insulating material that has a condensation effect on gas.

[0013] Preferably, an activated carbon adsorption layer and a hydrogen separation membrane are arranged above the inner cavity of the hydrogen purification collection cylinder, and the hydrogen separation membrane is arranged above the activated carbon adsorption layer, and the top of the hydrogen purification collection cylinder is connected to a hydrogen exhaust pipe.

[0014] Preferably, the bottom of the hydrogen purification collection cylinder is connected to a water vapor collection box through a drain pipe, and a one-way valve is provided on the drain pipe.

[0015] Preferably, a connecting conduit is provided inside the hydrogen purification collection cylinder and at an end thereof which is in communication with the second connecting pipe, and a plurality of through holes are evenly formed on the outer surface of the connecting conduit.

[0016] Preferably, a plurality of ventilation holes are evenly opened inside the activated carbon adsorption layer, and the ventilation holes are arranged in a cone shape, and the diameter of the ventilation holes gradually decreases from bottom to top.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0018] The present invention can drive the mixing of gases inside the air guide cylinder and the mixing cylinder through the cooperation between the air guide pipe, the rotating rod and the stirring blade, thereby reducing the overall hydrogen concentration, avoiding the problem of excessively high hydrogen concentration in local areas, preventing the generation of high-concentration hydrogen at the discharge port, and improving safety; and gas will only be generated when the hydrogen fuel cell vehicle is running, that is, when there is gas flowing in the air guide pipe, the rotating impeller will be driven to rotate, replacing the transmission through the fan or other driving device to drive the rotating impeller to work, saving costs, and the rotating rod mechanism will only start to operate when the hydrogen fuel cell vehicle is running, and the rotating mechanism will automatically stop working when no gas is generated, reducing the loss of the rotating mechanism.

[0019] The cooperation between the electric gas control valve, the balance tube and the hydrogen density detector arranged in the present invention can detect the safety factor of the hydrogen concentration in the area with the highest gas concentration. When the detected hydrogen concentration exceeds the standard safety threshold, the electric gas control valve will be opened to allow the safety gas to enter the gas cylinder from the balance tube, thereby reducing the hydrogen concentration inside the gas cylinder, so that the hydrogen concentration in the area with the highest hydrogen concentration between the gas cylinder and the mixing cylinder is controlled below the hydrogen standard threshold, thereby ensuring the safety of the hydrogen discharge process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a schematic structural diagram of a hydrogen exhaust device for a fuel cell according to the present invention.

[0021] Figure 2 This is a structural cross-sectional view of a fuel cell hydrogen exhaust device of the present invention.

[0022] Figure 3The present invention is a schematic diagram of the structure of the interior of a hydrogen purification collection cylinder in a fuel cell hydrogen exhaust device.

[0023] Figure 4 The figure is a schematic structural diagram of a rotating mechanism in a fuel cell hydrogen exhaust device of the present invention.

[0024] Figure 5 for Figure 2 A partial enlarged view of point A in the middle.

[0025] 1. Air guide cylinder; 2. Mixing cylinder; 3. First connecting pipe; 4. Preliminary filter cylinder; 5. Second connecting pipe; 6. Hydrogen purification collection cylinder; 7. Air guide tube; 8. Rotating rod; 9. Rotating impeller; 10. Buffer ventilation plate; 11. Hydrogen density detector; 12. Balance pipe; 13. Electric gas control valve; 14. Fixing kit; 15. Condensation breathable layer; 16. Several breathable holes; 17. Activated carbon adsorption layer; 18. Hydrogen separation membrane; 19. Hydrogen exhaust pipe; 20. Drain pipe; 21. Water vapor collection box; 22. One-way valve; 23. Stirring blade; 24. Connecting duct; 25. Through hole; 26. Vent hole. DETAILED DESCRIPTION

[0026] The scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The present invention provides a fuel cell hydrogen exhaust device, referring to Figure 1 and Figure 2 , comprising an air guide cylinder 1, a mixing cylinder 2 connected to one end of the air guide cylinder 1, a preliminary filter cylinder 4 connected to one end of the mixing cylinder 2 through a first connecting pipe 3, and a hydrogen purification collection cylinder 6 connected to one end of the preliminary filter cylinder 4 through a second connecting pipe 5;

[0028] One side of the air guide cylinder 1 is connected with an air guide pipe 7, and a rotating mechanism is provided between the air guide cylinder 1 and the mixing cylinder 2, the rotating mechanism comprising a rotating rod 8 rotating at the center of the inner wall of the air guide cylinder 1 and one end extending to the inside of the mixing cylinder 2, a rotating impeller 9 fixed to the outside of the rotating rod 8 and located inside the air guide cylinder 1, and a stirring blade 23 fixed to the outside of the rotating rod 8 and located inside the mixing cylinder 2;

[0029] The airflow generated during the driving of the hydrogen fuel cell vehicle enters the air cylinder 1 through the air duct 7, and then enters the mixing cylinder 2 from the air cylinder 1 for mixing. In the process of the gas entering the air cylinder 1 from the air duct 7, the rotating impeller 9 is driven to rotate, thereby driving the rotating rod 8 to rotate, and the rotating rod 8 drives the stirring blade 23 to rotate. The connecting end of the air duct 7 and the air cylinder 1 is located at the lower end position of the center of the air cylinder 1, ensuring that the air outlet end of the air duct 7 blows toward the lower end of one side of the rotating impeller 9. When gas is blown into the air duct 7, it can drive the rotating impeller 9 to rotate.

[0030] Specifically, the air duct 7 is first connected to the exhaust gas path of the hydrogen fuel cell vehicle. During the driving of the hydrogen fuel cell vehicle, the outside air will generate an airflow and enter the air cylinder 1 through the air duct 7. When entering the mixing cylinder 2 from the air cylinder 1, the gas is mixed. In the process of entering the air cylinder 1 from the air duct 7, the impeller 9 is driven to rotate, thereby driving the rotating rod 8 to rotate. The rotating rod 8 drives the stirring blade 23 to rotate, thereby driving the gas inside the air cylinder 1 and the mixing cylinder 2 to mix, thereby reducing the overall hydrogen concentration, avoiding the problem of excessive hydrogen concentration in local areas, preventing the generation of high-concentration hydrogen at the discharge port, and improving safety. The mixed gas is filtered through the preliminary filter cylinder 4 to filter out water vapor and some impurities in the hydrogen. The gas after preliminary filtration is further improved by the hydrogen purification collection cylinder 6.

[0031] It is explained here that gas is only generated when the hydrogen fuel cell vehicle is running, that is, when there is gas flowing in the air duct 7, the impeller 9 is driven to rotate, which replaces the transmission through the fan or other driving device to drive the impeller 9 to work, saving costs. Moreover, the rotating rod mechanism starts to operate when the battery vehicle is running, and the rotating mechanism will automatically stop working when no gas is generated, reducing the loss of the rotating mechanism.

[0032] In another preferred embodiment, referring to Figure 2 and Figure 5 A buffer ventilation plate 10 is provided on the outer surface of the rotating rod 8 and between the gas guide cylinder 1 and the mixing cylinder 2. The area between the buffer ventilation plate 10 and the rotating impeller 9 is the area with the highest gas concentration. A hydrogen density detector 11 is provided on one side of the inner wall of the gas guide cylinder 1. A balance pipe 12 is connected to the top of the gas guide cylinder 1, and an electric gas control valve 13 is provided on the balance pipe 12.

[0033] Specifically, when the hydrogen fuel cell vehicle is running, the exhaust gas path of the hydrogen fuel cell vehicle introduces gas through the air duct 7, and the hydrogen density detector 11 can detect the concentration of hydrogen inside the mixing cylinder 2. When the detected hydrogen concentration exceeds the standard safety threshold, the electric gas control valve 13 will be opened to allow safety gas to enter the air cylinder 1 from the balance pipe 12, thereby reducing the hydrogen concentration inside the air cylinder 1 and controlling the hydrogen concentration in the area with the highest hydrogen concentration between the air cylinder 1 and the mixing cylinder 2 to be below the standard hydrogen threshold.

[0034] In another preferred embodiment, referring to Figure 3 The air guide cylinder 1 and the mixing cylinder 2 are both set to be cylindrical, the cross-sectional radius of the mixing cylinder 2 is larger than the cross-sectional radius of the air guide cylinder 1, and the inner cavity of the mixing cylinder 2 is set to be conical, and the inner cavity size of the mixing cylinder 2 gradually increases from the end close to the air guide cylinder 1 to the end away from the air guide cylinder 1.

[0035] Under the condition of ensuring the safety of hydrogen concentration inside the gas guide cylinder 1, the mixed gas is transmitted from the cavity of the conical mixing cylinder 2. During the transmission process of the cavity of the conical mixing cylinder 2, the concentration of the mixed gas will gradually decrease. At the same time, during the gas transmission process, the stirring blades 23 outside the rotating rod 8 drive the gas inside the mixing cylinder 2 to stir evenly, thereby further ensuring the safety of the exhaust device. Since the mass of hydrogen is relatively light, the accumulation of hydrogen above the inner cavity of the mixing cylinder 2 can be avoided.

[0036] In another preferred embodiment, referring to Figure 4 A fixing sleeve 14 is disposed on the outer surface of the rotating rod 8 , and two ends of the fixing sleeve 14 are respectively connected to two sides of the inner wall of the mixing barrel 2 , and the rotating rod 8 is rotatably connected to the center of the fixing sleeve 14 .

[0037] Specifically, when the gas entering the air duct 7 enters the air cylinder 1 and drives the rotating impeller 9 to rotate, one end of the rotating rod 8 is rotatably connected to the inner wall of the air cylinder 1, and the rotating rod 8 arranged in the mixing cylinder 2 is rotatably connected to the fixing kit 14, thereby ensuring the stability of the rotation of the rotating rod 8.

[0038] In another preferred embodiment, referring to Figure 2 The interior of the preliminary filter cartridge 4 is filled with a condensation breathable layer 15, on which a plurality of breathable holes 16 are evenly provided. The material of the condensation breathable layer is a transparent heat-insulating material, which has a condensation effect on the gas.

[0039] Specifically, when the mixed gas enters the preliminary filter cartridge 4 from the first connecting pipe 3, the gas passes through the air holes 16 on the condensation air permeable layer 15 set inside the preliminary filter cartridge 4. When the mixed gas passes through the condensation air permeable layer 15, the water vapor in the mixed gas liquefies into water, and the liquefied water and hydrogen flow further along the bottom of the preliminary filter cartridge 4 together.

[0040] In another preferred embodiment, referring to Figure 3 An activated carbon adsorption layer 17 and a hydrogen separation membrane 18 are arranged above the inner cavity of the hydrogen purification collection cylinder 6, and the hydrogen separation membrane 18 is arranged above the activated carbon adsorption layer 17. The top of the hydrogen purification collection cylinder 6 is connected to a hydrogen exhaust pipe 19.

[0041] Specifically, after liquefaction in the preliminary filter cartridge 4, water and hydrogen enter the hydrogen purification collection cartridge 6 along the second connecting pipe 5. Under the action of the activated carbon adsorption layer 17, the unliquefied water vapor in the hydrogen can be further absorbed to ensure the purity of the hydrogen purification. The hydrogen is further purified by the hydrogen separation membrane. The hydrogen separation membrane utilizes the different solubilities and diffusion coefficients of various gases in the membrane, resulting in different relative permeation parameter rates of different gases in the membrane. Therefore, the hydrogen separation membrane can be used to separate other gases in the gas, such as oxygen, nitrogen, hydrogen sulfide, etc., to further improve the purity of the hydrogen.

[0042] The hydrogen exhaust pipe 19 is a PVC high-strength explosion-proof pipe, which can ensure the safety of hydrogen collection.

[0043] In another preferred embodiment, referring to Figure 2 The bottom of the hydrogen purification collection cylinder 6 is connected to a water vapor collection box 21 through a drain pipe 20 , and a one-way valve 22 is provided on the drain pipe 20 .

[0044] After the water enters the hydrogen purification collection cylinder 6 through the second connecting pipe 5 , it flows into the water vapor collection box 21 along the drain pipe 20 for collection. The one-way valve 22 is set to prevent the water vapor from being vaporized again and returning to the hydrogen purification collection cylinder 6 .

[0045] In another preferred embodiment, referring to Figure 3 A connecting conduit 24 is provided inside the hydrogen purification collection cylinder 6 and at its end portion which is connected to the second connecting pipe 5 , and a plurality of through holes 25 are evenly formed on the outer surface of the connecting conduit 24 .

[0046] Specifically, the gas and water enter the connecting conduit 24 through the second connecting pipe 5 , the water flows downward through the through hole 25 at the bottom of the connecting conduit 24 , and the gas flows upward through the through hole 25 at the top of the connecting conduit 24 .

[0047] In another preferred embodiment, referring to Figure 3 A plurality of vent holes 26 are evenly arranged inside the activated carbon adsorption layer 17, and the vent holes 26 are configured to be conical, and the diameter of the vent holes 26 gradually decreases from bottom to top.

[0048] The provision of the conical vent holes 26 can increase the contact area between the gas and the activated carbon adsorption layer 17, thereby increasing the adsorption degree of the activated carbon adsorption layer 17 to water vapor and ensuring the purity of the collected hydrogen.

[0049] The above are only partial or preferred embodiments of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A fuel cell hydrogen exhaust device, characterized in that: It comprises an air guide cylinder (1), a mixing cylinder (2) connected to one end of the air guide cylinder (1), a preliminary filter cylinder (4) connected to one end of the mixing cylinder (2) via a first connecting pipe (3), and a hydrogen purification collection cylinder (6) connected to one end of the preliminary filter cylinder (4) via a second connecting pipe (5); One side of the air guide cylinder (1) is connected to an air guide pipe (7), and a rotating mechanism is provided between the air guide cylinder (1) and the mixing cylinder (2), the rotating mechanism comprising a rotating rod (8) rotating at the center of the inner wall of the air guide cylinder (1) and with one end extending into the interior of the mixing cylinder (2), a rotating impeller (9) fixed to the outside of the rotating rod (8) and located inside the air guide cylinder (1), and a stirring blade (23) fixed to the outside of the rotating rod (8) and located inside the mixing cylinder (2); The airflow generated during the driving of the hydrogen fuel cell vehicle enters the air cylinder (1) through the air pipe (7), and then enters the mixing cylinder (2) from the air cylinder (1) for mixing. In the process of the gas entering the air cylinder (1) from the air pipe (7), the rotating impeller (9) is driven to rotate, thereby driving the rotating rod (8) to rotate, and the rotating rod (8) drives the stirring blade (23) to rotate. The connecting end of the air pipe (7) and the air cylinder (1) is located at the lower end of the center of the air cylinder (1), ensuring that the air outlet end of the air pipe (7) blows toward the lower end of one side of the rotating impeller (9). When gas is blown into the air pipe (7), the rotating impeller (9) can be driven to rotate.

2. A fuel cell hydrogen exhaust device according to claim 1, characterized in that: A buffer ventilation plate (10) is provided on the outer surface of the rotating rod (8) and between the gas guide cylinder (1) and the mixing cylinder (2); the area between the buffer ventilation plate (10) and the rotating impeller (9) is the area with the highest gas concentration; a hydrogen density detector (11) is provided on one side of the inner wall of the gas guide cylinder (1); a balance pipe (12) is connected to the top of the gas guide cylinder (1), and an electric gas control valve (13) is provided on the balance pipe (12).

3. A fuel cell hydrogen exhaust device according to claim 1, characterized in that: The air guide cylinder (1) and the mixing cylinder (2) are both arranged in a cylindrical shape, the cross-sectional radius of the mixing cylinder (2) is larger than the cross-sectional radius of the air guide cylinder (1), and the inner cavity of the mixing cylinder (2) is arranged in a conical shape, with the inner cavity size of the mixing cylinder (2) gradually increasing from one end close to the air guide cylinder (1) to one end away from the air guide cylinder (1).

4. A fuel cell hydrogen exhaust device according to claim 1, characterized in that: The outer surface of the rotating rod (8) is provided with a fixing sleeve (14), and the two ends of the fixing sleeve (14) are respectively connected to the two sides of the inner wall of the mixing barrel (2), and the rotating rod (8) is rotatably connected to the center of the fixing sleeve (14).

5. A fuel cell hydrogen exhaust device according to claim 1, characterized in that: The interior of the preliminary filter cartridge (4) is filled with a condensation breathable layer (15), on which a plurality of breathable holes (16) are evenly arranged. The material of the condensation breathable layer (15) is a transparent heat-insulating material that has a condensing effect on gas.

6. A fuel cell hydrogen exhaust device according to claim 1, characterized in that: An activated carbon adsorption layer (17) and a hydrogen separation membrane (18) are arranged above the inner cavity of the hydrogen purification collection cylinder (6), and the hydrogen separation membrane (18) is arranged above the activated carbon adsorption layer (17). The top of the hydrogen purification collection cylinder (6) is connected to a hydrogen exhaust pipe (19).

7. A fuel cell hydrogen exhaust device according to claim 1, characterized in that: The bottom of the hydrogen purification collection cylinder (6) is connected to a water vapor collection box (21) via a drainage pipe (20), and a one-way valve (22) is provided on the drainage pipe (20).

8. A fuel cell hydrogen exhaust device according to claim 1, characterized in that: A connecting conduit (24) is provided inside the hydrogen purification collection cylinder (6) and at an end thereof which is in communication with the second connecting pipe (5), and a plurality of through holes (25) are evenly provided on the outer surface of the connecting conduit (24).

9. A fuel cell hydrogen exhaust device according to claim 6, characterized in that: A plurality of ventilation holes (26) are evenly arranged inside the activated carbon adsorption layer (17), and the ventilation holes (26) are arranged in a cone shape, and the diameter of the ventilation holes (26) gradually decreases from bottom to top.

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