Fuel cell tail emission hydrogen elimination system for forklift and fuel cell engine

Abstract

The utility model relates to the technical field of hydrogen fuel cells, and discloses a fuel cell tail exhaust hydrogen elimination system for a forklift truck and a fuel cell engine, the fuel cell tail exhaust hydrogen elimination system for the forklift truck comprises a tail exhaust hydrogen elimination device body, the inner wall of the tail exhaust hydrogen elimination device body is enclosed to form a containing cavity, and the containing cavity is used for containing tail exhaust gas from the fuel cell engine; the discharging device is connected with the tail discharging and hydrogen eliminating device body, and the discharging device is used for selectively communicating the containing cavity with the outside; the positioning device is used for acquiring the real-time position of the forklift and / or judging whether the forklift is located in the target space or not and generating a real-time position signal; the control unit is in electric connection and / or communication connection with the positioning device and the discharging device, and the control unit is used for controlling starting and stopping of the discharging device based on the real-time position signal. According to the fuel cell tail emission hydrogen elimination system for the forklift, the explosion risk caused by the fact that hydrogen in the tail emission of a fuel cell engine is accumulated in a closed space is avoided.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen fuel cell technology, specifically to a hydrogen removal system for fuel cell exhaust in forklifts and a fuel cell engine. Background Technology

[0002] Hydrogen fuel cells are widely used in various vehicles due to their high energy conversion efficiency, rapid response, and zero emissions. Forklifts, as industrial handling vehicles, are used for loading, unloading, and short-distance transportation of palletized goods.

[0003] Applying fuel cell engines to forklifts offers advantages such as fast hydrogen refueling, zero emissions, and clean and environmentally friendly practices. However, since forklifts primarily operate in enclosed workshops, the exhaust gases from fuel cell engines cannot be directly released into the atmosphere. Otherwise, hydrogen may accumulate, posing a flammable and explosive risk. Utility Model Content

[0004] In view of this, the present invention provides a hydrogen removal system for fuel cell exhaust in forklifts and a fuel cell engine to solve the problem that hydrogen in the exhaust of fuel cell engines in forklifts can easily accumulate in enclosed spaces and cause an explosion risk.

[0005] In a first aspect, this utility model provides a hydrogen removal system for fuel cell exhaust in forklifts, comprising:

[0006] The exhaust hydrogen elimination device body has an inner wall that forms a receiving cavity, which is used to contain the exhaust gas from the fuel cell engine.

[0007] The emission device is connected to the main body of the tail exhaust hydrogen removal device. The emission device is used to selectively connect the containment chamber to the outside.

[0008] A positioning device is used to acquire the real-time position of the forklift and / or determine whether the forklift is within the target space, and to generate a real-time position signal;

[0009] The control unit is electrically and / or communicatively connected to the positioning device and the emission device. The control unit is used to control the opening and closing of the emission device based on real-time position signals. The control unit controls the emission device to open only when the forklift is in the target space.

[0010] Beneficial effects: The hydrogen elimination system for fuel cell exhaust in forklifts provided by this utility model, under normal operating conditions, when the forklift is running in a closed space, the exhaust gas from the fuel cell engine is discharged into the receiving chamber of the hydrogen elimination device. The pressure, hydrogen concentration, and liquid level in the receiving chamber are all below the set threshold, the emission device is in the closed state, and the hydrogen elimination device does not discharge hydrogen. When the forklift leaves the closed space, only when the positioning device detects that the forklift is in the target space, the control unit controls the emission device to open based on the real-time position signal of the forklift, so that the receiving chamber is connected to the outside, thereby draining the liquid water and gas in the receiving chamber, realizing the function of automatic emission of the forklift within the set area, and avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust gas of the fuel cell engine in the closed space.

[0011] In one optional embodiment, the emission device includes a first valve and a second valve, both of which are connected to the main body of the tail exhaust hydrogen elimination device. The first valve is used to selectively discharge hydrogen gas in the containment chamber to the outside, and the second valve is used to selectively discharge liquid in the containment chamber to the outside.

[0012] Beneficial effects: Under normal operating conditions, both the first and second valves are closed. The control unit controls the first valve to open only when the positioning device detects that the forklift is in the target space, thereby releasing the hydrogen in the containment chamber to the outside and ensuring the safe and stable operation of the system. The control unit controls the second valve to open, thereby releasing the liquid in the containment chamber to the outside, which helps maintain the performance of the fuel cell and extend the system life.

[0013] In one alternative embodiment, the hydrogen removal system for fuel cell exhaust in forklifts further includes a pressure sensor, which is electrically and / or communicatively connected to the control unit, and is used to monitor the pressure within the containment chamber.

[0014] The hydrogen removal system for fuel cells in forklifts also includes an alarm device, which is electrically and / or communicatively connected to the control unit. When the actual pressure value monitored by the pressure sensor exceeds the set pressure threshold, the control unit activates the alarm device.

[0015] Beneficial effects: By setting a pressure sensor, the pressure inside the containment chamber can be monitored in real time. Once the pressure inside the containment chamber exceeds the set pressure threshold, the control unit controls the alarm device to be activated based on the pressure signal, thereby reminding the driver to drive the forklift out of the enclosed space and to the target space. Only when the forklift is in the target space, the control unit controls the emission device to be activated, avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust of the fuel cell engine in the enclosed space.

[0016] In one alternative implementation, when the actual pressure value monitored by the pressure sensor is greater than a set pressure threshold, the control unit controls the first valve and / or the second valve to open if and only if the forklift is in the target space.

[0017] Beneficial effects: When the actual pressure value monitored by the pressure sensor is greater than the set pressure threshold, if the forklift is not yet in the target space, the emission device remains closed; only when the forklift is in the target space, the control unit controls the first valve and / or the second valve to open, realizing the function of automatic emission of the forklift within the set area, effectively avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust of the fuel cell engine in a closed space.

[0018] In one alternative embodiment, the hydrogen removal system for fuel cell exhaust in forklifts further includes a hydrogen concentration sensor, which is electrically and / or communicatively connected to the control unit, and is used to monitor the hydrogen concentration in the containment cavity.

[0019] When the actual hydrogen concentration value monitored by the hydrogen concentration sensor is greater than the set hydrogen concentration threshold, the control unit activates the alarm device.

[0020] Beneficial effects: By setting up a hydrogen concentration sensor, the hydrogen concentration in the containment cavity can be monitored in real time. Once the hydrogen concentration in the containment cavity exceeds the set hydrogen concentration threshold, the control unit activates the alarm device to remind the driver to drive the forklift out of the enclosed space and to the target space. Only when the forklift is in the target space, the control unit activates the emission device to achieve automatic hydrogen discharge from the forklift within the set area, thus avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust of the fuel cell engine in the enclosed space.

[0021] In one alternative implementation, when the actual hydrogen concentration value monitored by the hydrogen concentration sensor is greater than the set hydrogen concentration threshold, the control unit controls the first valve to open if and only if the forklift is in the target space.

[0022] Beneficial effects: When the actual hydrogen concentration value monitored by the hydrogen concentration sensor is greater than the set hydrogen concentration threshold, if the forklift is not yet in the target space, the first valve remains closed; the control unit controls the first valve to open only when the forklift is in the target space, effectively avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust of the fuel cell engine in a closed space.

[0023] In one optional embodiment, the hydrogen removal system for fuel cell exhaust in forklifts further includes an air compressor, which is electrically and / or communicatively connected to the control unit, and the output end of the air compressor is connected to the exhaust hydrogen removal device body.

[0024] The hydrogen removal system for fuel cell exhaust in forklifts also includes a third valve, which is electrically and / or communicatively connected to the control unit. The third valve is used to selectively connect the output of the air compressor to the housing.

[0025] When the actual hydrogen concentration value monitored by the hydrogen concentration sensor is greater than the set hydrogen concentration threshold, the control unit controls the third valve to open.

[0026] Beneficial effects: Under normal operating conditions, when the forklift is running in an enclosed space, the exhaust gas from the fuel cell engine is discharged into the containment chamber of the hydrogen elimination device. The first, second, and third valves are all closed, and the pressure, hydrogen concentration, and liquid level in the containment chamber are all below the set threshold. When the actual hydrogen concentration value monitored by the hydrogen concentration sensor exceeds the set hydrogen concentration threshold, the control unit activates the alarm device. At the same time, the control unit starts or accelerates the air compressor, and the control unit opens the third valve, allowing fresh air to be introduced into the containment chamber through the air compressor. This reduces the actual hydrogen concentration value in the containment chamber to below the set hydrogen concentration threshold, ensuring stable operation of the system.

[0027] In one alternative embodiment, the hydrogen removal system for fuel cell exhaust in forklifts further includes a liquid level sensor, which is electrically and / or communicatively connected to the control unit, and is used to monitor the liquid level in the containment chamber.

[0028] When the actual liquid level value monitored by the liquid level sensor is greater than the set liquid level threshold, the control unit activates the alarm device.

[0029] Beneficial effects: By setting up a liquid level sensor, the liquid level in the containment cavity can be monitored in real time. When the liquid level sensor detects that the actual liquid level in the containment cavity is greater than the set liquid level threshold, the control unit controls the alarm device to be activated, thereby reminding the driver to drive the forklift out of the enclosed space and to the target space. Only when the forklift is in the target space, the control unit controls the discharge device to be activated, thereby realizing the automatic drainage of the forklift in the set area and avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust of the fuel cell engine in the enclosed space.

[0030] In one alternative implementation, when the actual liquid level value monitored by the liquid level sensor is greater than the set liquid level threshold, the control unit controls the second valve to open if and only if the forklift is in the target space.

[0031] Beneficial effects: When the actual liquid level value monitored by the liquid level sensor is greater than the set liquid level threshold, if the forklift is not yet in the target space, the second valve remains closed; the control unit controls the second valve to open only when the forklift is in the target space, effectively avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust of the fuel cell engine in a closed space.

[0032] In one alternative embodiment, the inner wall of the exhaust hydrogen removal device body is provided with a sound-absorbing layer, which is made of sound-absorbing material.

[0033] Beneficial effects: It can effectively reduce exhaust noise and improve comfort.

[0034] Secondly, this utility model also provides a fuel cell engine, including: a fuel cell engine body, and a hydrogen removal system for fuel cell exhaust in forklifts as described above.

[0035] Beneficial effects: The fuel cell engine of the second aspect includes the hydrogen elimination system for fuel cell exhaust of the forklift of the first aspect, and therefore, the fuel cell engine of the second aspect includes all the beneficial effects of the hydrogen elimination system for fuel cell exhaust of the forklift of the first aspect. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a control principle diagram of a hydrogen removal system for fuel cell exhaust in a forklift, according to an embodiment of the present invention.

[0038] Figure 2 This is a schematic diagram illustrating the working principle of a hydrogen removal system for fuel cells in forklifts, according to an embodiment of this utility model.

[0039] Figure 3 This is a schematic diagram of the internal structure of the exhaust hydrogen elimination device body of a fuel cell exhaust hydrogen elimination system for forklifts, according to an embodiment of this utility model.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10. Main body of the tail exhaust hydrogen removal device; 100. Receiving cavity; 11. Sound-absorbing layer;

[0042] 20. Discharge device; 21. First valve; 22. Second valve;

[0043] 30. Positioning device;

[0044] 40. Control unit;

[0045] 51. Pressure sensor; 52. Hydrogen concentration sensor; 53. Liquid level sensor;

[0046] 60. Alarm device;

[0047] 70. Air compressor; 71. Third valve. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0049] The following is combined Figures 1 to 3 The following describes embodiments of the present invention.

[0050] According to an embodiment of the present invention, in one aspect, a hydrogen removal system for fuel cell exhaust in forklifts is provided, comprising:

[0051] For the exhaust hydrogen removal device body 10, please refer to [link / reference]. Figure 3 As shown, its inner wall encloses to form a receiving cavity 100, which is used to receive exhaust gas from the fuel cell engine.

[0052] For emission device 20, please refer to Figure 2 As shown, the emission device 20 is connected to the tail exhaust hydrogen elimination device body 10, and the emission device 20 is used to selectively connect the receiving cavity 100 to the outside.

[0053] Positioning device 30, please combine them together. Figure 1 As shown, the positioning device 30 is used to acquire the real-time position of the forklift and / or determine whether the forklift is within the target space, and generate a real-time position signal;

[0054] Control unit 40 is electrically and / or communicatively connected to positioning device 30 and emission device 20. Control unit 40 is used to control the opening and closing of emission device 20 based on real-time position signals. Control unit 40 controls emission device 20 to open if and only if the forklift is in the target space.

[0055] It should be noted that, due to the risk of hydrogen gas accumulating and exploding in enclosed spaces, the target space in this paper refers to an open area and / or spacious area distinct from enclosed spaces, in order to avoid the risk of hydrogen gas accumulating and exploding in enclosed spaces. The positioning device 30 can employ a Wi-Fi Based Radio Frequency Identification (RFID) Real Time Location System (Wi-Fi RTT), an Ultra-Wideband Real Time Location System (UWB), a Light Detection and Ranging based Positioning System (LiDAR), a Simultaneous Localization and Mapping (SLAM) system, a Global Positioning System (GPS), and / or an Electronic Fence (EF). The control unit 40 can employ a Fuel Cell System Controller (FCU).

[0056] The hydrogen elimination system for fuel cell exhaust in forklifts provided by this utility model operates normally. When the forklift is running in a closed space, the exhaust gas from the fuel cell engine is discharged into the receiving cavity 100 of the exhaust hydrogen elimination device body 10. The pressure, hydrogen concentration, and liquid level in the receiving cavity 100 are all below a set threshold, the emission device 20 is closed, and the exhaust hydrogen elimination device body 10 does not discharge hydrogen. When the forklift leaves the closed space, the control unit 40 controls the emission device 20 to open based on the real-time position signal of the forklift, only when the positioning device 30 detects that the forklift is in the target space. This allows the receiving cavity 100 to connect with the outside, thereby emptying the liquid water and gas in the receiving cavity 100. This achieves the function of automatic emission within the set area, avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust gas of the fuel cell engine in a closed space.

[0057] In some embodiments, see Figure 2 As shown, the emission device 20 includes a first valve 21 and a second valve 22. Both the first valve 21 and the second valve 22 are connected to the tail exhaust hydrogen elimination device body 10. The first valve 21 is used to selectively discharge hydrogen in the containment chamber 100 to the outside, and the second valve 22 is used to selectively discharge liquid in the containment chamber 100 to the outside.

[0058] Under normal operating conditions, both the first valve 21 and the second valve 22 are closed. The control unit 40 controls the first valve 21 to open only when the positioning device 30 detects that the forklift is in the target space, thereby releasing the hydrogen in the containment cavity 100 to the outside and ensuring the safe and stable operation of the system. The control unit 40 controls the second valve 22 to open, thereby releasing the liquid in the containment cavity 100 to the outside, which is beneficial to maintaining the performance of the fuel cell and extending the system life.

[0059] In some embodiments, please combine Figure 1 and Figure 2 As shown, the hydrogen removal system for fuel cell exhaust in forklifts also includes a pressure sensor 51, which is electrically and / or communicatively connected to the control unit 40. The pressure sensor 51 is used to monitor the pressure in the containment cavity 100 and generate a pressure signal.

[0060] The hydrogen removal system for fuel cell exhaust in forklifts also includes an alarm device 60, which is electrically and / or communicatively connected to the control unit 40. When the actual pressure value monitored by the pressure sensor 51 is greater than the set pressure threshold, the control unit 40 controls the alarm device 60 to open.

[0061] By setting a pressure sensor 51, the pressure inside the containment cavity 100 is monitored in real time. Once the pressure inside the containment cavity 100 exceeds the set pressure threshold, the control unit 40 controls the alarm device 60 to be activated based on the pressure signal, thereby reminding the driver to drive the forklift away from the enclosed space and to the target space. Only when the forklift is in the target space, the control unit 40 controls the emission device 20 to be activated, thus avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust of the fuel cell engine in the enclosed space.

[0062] In some embodiments, when the actual pressure value monitored by the pressure sensor 51 is greater than a set pressure threshold, the control unit 40 controls the first valve 21 and / or the second valve 22 to open if and only if the forklift is in the target space.

[0063] When the actual pressure value monitored by the pressure sensor 51 is greater than the set pressure threshold, if the forklift is not yet in the target space, the emission device 20 remains closed; if and only if the forklift is in the target space, the control unit 40 controls the first valve 21 and / or the second valve 22 to open, so as to realize the function of automatic emission of the forklift in the set area, effectively avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust of the fuel cell engine in the closed space.

[0064] In some embodiments, please combine Figure 1 and Figure 2As shown, the hydrogen removal system for fuel cell exhaust in forklifts also includes a hydrogen concentration sensor 52, which is electrically and / or communicatively connected to the control unit 40. The hydrogen concentration sensor 52 is used to monitor the hydrogen concentration in the containment cavity 100.

[0065] When the actual hydrogen concentration value monitored by the hydrogen concentration sensor 52 is greater than the set hydrogen concentration threshold, the control unit 40 controls the alarm device 60 to be activated.

[0066] By setting a hydrogen concentration sensor 52, the hydrogen concentration in the containment cavity 100 is monitored in real time. Once the hydrogen concentration in the containment cavity 100 exceeds the set hydrogen concentration threshold, the control unit 40 controls the alarm device 60 to be activated, thereby reminding the driver to drive the forklift out of the enclosed space and to the target space. Only when the forklift is in the target space, the control unit 40 controls the emission device 20 to be activated, thereby realizing the automatic hydrogen emission of the forklift within the set area and avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust of the fuel cell engine in the enclosed space.

[0067] In some embodiments, when the actual hydrogen concentration value monitored by the hydrogen concentration sensor 52 is greater than the set hydrogen concentration threshold, the control unit 40 controls the first valve 21 to open if and only if the forklift is in the target space.

[0068] When the actual hydrogen concentration value monitored by the hydrogen concentration sensor 52 is greater than the set hydrogen concentration threshold, if the forklift is not yet in the target space, the first valve 21 remains closed; if and only if the forklift is in the target space, the control unit 40 controls the first valve 21 to open, effectively avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust of the fuel cell engine in the enclosed space.

[0069] In some embodiments, see Figure 2 As shown, the hydrogen elimination system for fuel cell exhaust in forklifts also includes an air compressor 70, which is electrically and / or communicatively connected to the control unit 40, and the output end of the air compressor 70 is connected to the exhaust hydrogen elimination device body 10.

[0070] Please combine them together Figure 1 As shown, the hydrogen removal system for fuel cell exhaust in forklifts also includes a third valve 71, which is electrically and / or communicatively connected to the control unit 40. The third valve 71 is used to selectively connect the output end of the air compressor 70 to the receiving cavity 100.

[0071] When the actual hydrogen concentration value monitored by the hydrogen concentration sensor 52 is greater than the set hydrogen concentration threshold, the control unit 40 controls the third valve 71 to open.

[0072] Under normal operating conditions, when the forklift is running in an enclosed space, the exhaust gas from the fuel cell engine is discharged into the containment chamber 100 of the exhaust hydrogen elimination device body 10. The first valve 21, the second valve 22, and the third valve 71 are all closed, and the pressure, hydrogen concentration, and liquid level in the containment chamber 100 are all below the set threshold. When the actual hydrogen concentration value monitored by the hydrogen concentration sensor 52 is greater than the set hydrogen concentration threshold, the control unit 40 controls the alarm device 60 to open. At the same time, the control unit 40 controls the air compressor 70 to start or accelerate, and the control unit 40 controls the third valve 71 to open, so that fresh air is introduced into the containment chamber 100 through the air compressor 70, thereby reducing the actual hydrogen concentration value in the containment chamber 100 to below the set hydrogen concentration threshold, ensuring the stable operation of the system.

[0073] In some embodiments, please combine Figure 1 and Figure 2 As shown, the hydrogen removal system for fuel cell exhaust in forklifts also includes a liquid level sensor 53, which is electrically and / or communicatively connected to the control unit 40. The liquid level sensor 53 is used to monitor the liquid level in the containment cavity 100.

[0074] When the actual liquid level value monitored by the liquid level sensor 53 is greater than the set liquid level threshold, the control unit 40 controls the alarm device 60 to be activated.

[0075] By setting a liquid level sensor 53, the liquid level in the containment cavity 100 is monitored in real time. When the liquid level sensor 53 detects that the actual liquid level in the containment cavity 100 is greater than the set liquid level threshold, the control unit 40 controls the alarm device 60 to be activated, thereby reminding the driver to drive the forklift away from the enclosed space and to the target space. Only when the forklift is in the target space, the control unit 40 controls the discharge device 20 to be activated, thereby realizing automatic drainage of the forklift in the set area and avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust of the fuel cell engine in the enclosed space.

[0076] In some embodiments, when the actual liquid level value monitored by the liquid level sensor 53 is greater than the set liquid level threshold, the control unit 40 controls the second valve 22 to open if and only if the forklift is in the target space.

[0077] When the actual liquid level value monitored by the liquid level sensor 53 is greater than the set liquid level threshold, if the forklift is not yet in the target space, the second valve 22 remains closed; if and only if the forklift is in the target space, the control unit 40 controls the second valve 22 to open, effectively avoiding the risk of explosion caused by the accumulation of hydrogen in the exhaust of the fuel cell engine in the enclosed space.

[0078] In some embodiments, see Figure 3As shown, the inner wall of the exhaust hydrogen elimination device body 10 is provided with a sound-absorbing layer 11, which is made of sound-absorbing material and can effectively reduce exhaust noise and improve comfort.

[0079] Furthermore, the sound-absorbing layer 11 can be made of ceramic fiber sound-absorbing material, heat-resistant alloy sound-absorbing board, high-temperature sound-absorbing cotton, or membrane sound-absorbing material, which can not only effectively reduce exhaust noise, but also withstand high-temperature environments.

[0080] According to an embodiment of the present invention, another aspect provides a fuel cell engine, comprising: a fuel cell engine body, and a fuel cell exhaust hydrogen removal system for forklifts as described above.

[0081] The fuel cell engine in this embodiment includes the aforementioned hydrogen elimination system for fuel cell exhaust in for forklifts. Therefore, the fuel cell engine in this embodiment includes all the beneficial effects of the aforementioned hydrogen elimination system for fuel cell exhaust in forklifts.

[0082] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A hydrogen removal system for fuel cell exhaust in forklifts, characterized in that, include: The exhaust hydrogen removal device body (10) has an inner wall that encloses a receiving cavity (100) for receiving exhaust gas from the fuel cell engine. The emission device (20) is connected to the tail exhaust hydrogen elimination device body (10), and the emission device (20) is used to selectively connect the receiving cavity (100) to the outside. The positioning device (30) is used to acquire the real-time position of the forklift and / or determine whether the forklift is in the target space, and generate a real-time position signal; The control unit (40) is electrically and / or communicatively connected to the positioning device (30) and the discharge device (20), and the control unit (40) is used to control the opening and closing of the discharge device (20) based on the real-time position signal; the control unit (40) controls the discharge device (20) to open if and only if the forklift is in the target space.

2. The hydrogen removal system for fuel cell exhaust in forklifts according to claim 1, characterized in that, The emission device (20) includes a first valve (21) and a second valve (22). Both the first valve (21) and the second valve (22) are connected to the main body (10) of the tail exhaust hydrogen elimination device. The first valve (21) is used to selectively discharge hydrogen in the containment cavity (100) to the outside, and the second valve (22) is used to selectively discharge liquid in the containment cavity (100) to the outside.

3. The hydrogen removal system for fuel cell exhaust in forklifts according to claim 2, characterized in that, The hydrogen removal system for fuel cell exhaust in forklifts also includes a pressure sensor (51), which is electrically and / or communicatively connected to the control unit (40). The pressure sensor (51) is used to monitor the pressure in the containment cavity (100). The hydrogen removal system for fuel cell exhaust in forklifts also includes an alarm device (60), which is electrically and / or communicatively connected to the control unit (40). When the actual pressure value monitored by the pressure sensor (51) is greater than the set pressure threshold, the control unit (40) controls the alarm device (60) to open.

4. The hydrogen removal system for fuel cell exhaust in forklifts according to claim 3, characterized in that, When the actual pressure value monitored by the pressure sensor (51) is greater than the set pressure threshold, the control unit (40) controls the first valve (21) and / or the second valve (22) to open if and only if the forklift is in the target space.

5. The hydrogen removal system for fuel cell exhaust in forklifts according to claim 3, characterized in that, The hydrogen removal system for fuel cell exhaust in forklifts also includes a hydrogen concentration sensor (52), which is electrically and / or communicatively connected to the control unit (40). The hydrogen concentration sensor (52) is used to monitor the hydrogen concentration in the containment cavity (100). When the actual hydrogen concentration value monitored by the hydrogen concentration sensor (52) is greater than the set hydrogen concentration threshold, the control unit (40) controls the alarm device (60) to turn on.

6. The hydrogen removal system for fuel cell exhaust in forklifts according to claim 5, characterized in that, When the actual hydrogen concentration value monitored by the hydrogen concentration sensor (52) is greater than the set hydrogen concentration threshold, the control unit (40) controls the first valve (21) to open if and only if the forklift is in the target space.

7. The hydrogen removal system for fuel cell exhaust in forklifts according to claim 5, characterized in that, The hydrogen elimination system for fuel cell exhaust in forklifts also includes an air compressor (70), which is electrically and / or communicatively connected to the control unit (40), and the output end of the air compressor (70) is connected to the exhaust hydrogen elimination device body (10). The hydrogen removal system for fuel cell exhaust in forklifts also includes a third valve (71), which is electrically and / or communicatively connected to the control unit (40). The third valve (71) is used to selectively connect the output end of the air compressor (70) to the receiving cavity (100). When the actual hydrogen concentration value monitored by the hydrogen concentration sensor (52) is greater than the set hydrogen concentration threshold, the control unit (40) controls the third valve (71) to open.

8. The hydrogen removal system for fuel cell exhaust in forklifts according to claim 3, characterized in that, The hydrogen removal system for fuel cell exhaust in forklifts also includes a liquid level sensor (53), which is electrically and / or communicatively connected to the control unit (40). The liquid level sensor (53) is used to monitor the liquid level in the containment cavity (100). When the actual liquid level value monitored by the liquid level sensor (53) is greater than the set liquid level threshold, the control unit (40) controls the alarm device (60) to turn on.

9. The hydrogen removal system for fuel cell exhaust in forklifts according to claim 8, characterized in that, When the actual liquid level value monitored by the liquid level sensor (53) is greater than the set liquid level threshold, the control unit (40) controls the second valve (22) to open if and only if the forklift is in the target space.

10. The hydrogen removal system for fuel cell exhaust in forklifts according to any one of claims 1-9, characterized in that, The inner wall of the tail exhaust hydrogen elimination device body (10) is provided with a sound-absorbing layer (11), which is made of sound-absorbing material.

11. A fuel cell engine, characterized in that, include: The fuel cell engine body, and the fuel cell exhaust hydrogen removal system for forklifts as described in any one of claims 1 to 10.

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