Hydrogen filling device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU WENJIANG DISTRICT METEOROLOGICAL BUREAU
- Filing Date
- 2025-10-10
- Publication Date
- 2026-08-07
AI Technical Summary
[0004]本实用新型提供氢气充装装置，用于解决氢气储量耗尽或装置出现故障时，影响充气效率和生产进度的技术问题
本实用新型提供的氢气充装装置包括充气装置、储气容器以及输气管路，储气容器共设有多个，每个储气容器设置有气压检测单元，储气容器用于存储向充气装置内充装的氢气；输气管路包括主管路和多条支路，多条支路与主管路相连通，主管路连通充气装置，支路与储气容器一一对应并连通；其中，每个支路设置有进气阀，进气阀响应于气压检测单元，以在气压检测单元检测到储气容器的气压值低于第一阈值时关闭该储气容器的进气阀，在气压检测单元检测到储气容器的气压值高于第一阈值时能够打开该储气容器的进气阀。
Smart Images
Figure CN224607463U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of hydrogen filling technology, and particularly relates to a hydrogen filling device. Background Technology
[0002] In the hydrogen filling industry, an efficient and stable hydrogen supply is crucial for ensuring production continuity and product quality. Traditional hydrogen filling systems typically rely on a single storage container to store and supply hydrogen, a design that performs well when hydrogen demand is stable and the system operates without malfunctions. However, in practical applications, fluctuations in hydrogen demand, storage container capacity limitations, and potential system failures often restrict the improvement of filling efficiency due to the single storage container design.
[0003] Especially in emergency situations, when the hydrogen storage capacity of a single gas storage container is exhausted or the device malfunctions, manual intervention is required to replace the gas storage container or repair the malfunction. This is not only time-consuming and labor-intensive, but may also lead to production interruption, affecting gas filling efficiency and production progress. Utility Model Content
[0004] This utility model provides a hydrogen filling device to solve the technical problem of affecting filling efficiency and production progress when hydrogen reserves are depleted or the device malfunctions.
[0005] This utility model is achieved through the following technical solution: a hydrogen filling device, including a filling device, a gas storage container, and a gas transmission pipeline, wherein multiple gas storage containers are provided, each of which is equipped with a gas pressure detection unit, and the gas storage container is used to store hydrogen to be filled into the filling device; the gas transmission pipeline includes a main pipeline and multiple branch pipelines, the multiple branch pipelines being connected to the main pipeline, the main pipeline being connected to the filling device, and the branch pipelines corresponding to and connected to the gas storage containers one by one; wherein each branch pipeline is equipped with an inlet valve, the inlet valve responding to the gas pressure detection unit to close the inlet valve of the gas storage container when the gas pressure detection unit detects that the gas pressure value of the gas storage container is lower than a first threshold, and to open the inlet valve of the gas storage container when the gas pressure detection unit detects that the gas pressure value of the gas storage container is higher than the first threshold.
[0006] Optionally, it also includes a gas supply chamber, wherein the gas storage container is disposed in the gas supply chamber.
[0007] Optionally, there are multiple gas supply chambers, and each gas supply chamber is provided with at least one gas storage container.
[0008] Optionally, a first gas concentration detection unit is provided in the gas supply chamber, and the inlet valve responds to the first gas concentration detection unit to close the inlet valves of all branches connected to the gas storage container in the gas supply chamber when the hydrogen concentration in the gas supply chamber is higher than a second threshold.
[0009] Optionally, it also includes a first fan installed in the gas supply chamber. The first fan responds to the first gas concentration detection unit to turn on the first fan to reduce the hydrogen concentration in the gas supply chamber when the hydrogen concentration in the gas supply chamber is higher than a second threshold.
[0010] Optionally, it also includes an inflation chamber, in which the inflation device is installed.
[0011] Optionally, a second gas concentration detection unit is provided in the inflation chamber, and the air inlet valve responds to the second gas concentration detection unit to close the air inlet valves of all branches when the second hydrogen concentration in the inflation chamber is higher than a third threshold.
[0012] Optionally, the system also includes a second fan installed in the inflation chamber. The second fan responds to the second gas concentration detection unit to turn on the second fan to reduce the hydrogen concentration in the inflation chamber when the hydrogen concentration in the inflation chamber is higher than a third threshold.
[0013] Optionally, it also includes a warning light, which is responsive to the first gas concentration detection unit and the second gas concentration detection unit. The warning light is activated when the first gas concentration detection unit detects a concentration higher than a second threshold or the second gas concentration detection unit detects a concentration higher than a third threshold.
[0014] Optionally, it also includes a buzzer, which responds to the first gas concentration detection unit and the second gas concentration detection unit. The buzzer is activated when the first gas concentration detection unit detects a concentration higher than a second threshold or the second gas concentration detection unit detects a concentration higher than a third threshold.
[0015] Compared with the prior art, this utility model has the following advantages: The hydrogen filling device provided by this utility model includes a filling device, a gas storage container, and a gas transmission pipeline. Multiple gas storage containers are provided, each equipped with a pressure detection unit. The gas storage containers are used to store hydrogen to be filled into the filling device. The gas transmission pipeline includes a main pipeline and multiple branch pipelines, with the branch pipelines connected to the main pipeline. The main pipeline connects to the filling device, and each branch pipeline corresponds to and is connected to a gas storage container. Each branch pipeline is equipped with an inlet valve, which responds to the pressure detection unit. The inlet valve closes when the pressure detection unit detects that the pressure value of the gas storage container is lower than a first threshold, and opens when the pressure detection unit detects that the pressure value of the gas storage container is higher than the first threshold.
[0016] With the above structure, the hydrogen filling device provided by this utility model fills the target container with hydrogen through a filling device. During filling, when the pressure detection unit detects that the pressure value in the corresponding storage container is higher than a first threshold, the inlet valve is opened, and the hydrogen in the storage container is delivered to the target container through the gas delivery pipeline and the inlet valve. When the pressure detection unit detects that the pressure value in the corresponding storage container is lower than the first threshold, the inlet valve is closed, thereby filling the target container with a suitable storage container with sufficient hydrogen. Therefore, this hydrogen filling device can automatically switch the storage container for hydrogen delivery by opening and closing the inlet valve according to the pressure value of the storage container, thereby improving the filling efficiency. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the hydrogen filling device provided by this utility model; Figure 2 This is a process flow diagram of the hydrogen filling device provided by this utility model.
[0019] In the picture: 1-Inflation device; 2-Gas storage container; 3-Gas pressure detection unit; 4-Gas pipeline; 41-Main pipeline; 42-Branch pipeline; 5-Inlet valve; 6-Gas supply chamber; 7-First gas concentration detection unit; 8-First fan; 9-Inflation chamber; 10-Second gas concentration detection unit; 11-Second fan; 12-Warning light; 13-Buzzer; 14-Target container; 15-Valve; 16-Break-off valve. Detailed Implementation
[0020] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and 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 this application.
[0021] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0022] In the description of this application, it should be noted that, unless otherwise expressly 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0024] Example This utility model provides a hydrogen filling device to solve the technical problem of affecting filling efficiency and production progress when hydrogen reserves are depleted or the device malfunctions. The device comprises a filling unit 1, a gas storage container 2, and a gas delivery pipeline 4, wherein: like Figure 1 As shown, the filling device includes at least one filling unit for filling hydrogen into the target container 14. Each filling unit is equipped with a valve 15 for controlling the filling process of the target container 14 and realizing the control of filling on and off.
[0025] like Figure 1As shown, there are multiple gas storage containers 2. The gas storage containers 2 are used to store hydrogen. Each gas storage container 2 is equipped with a gas pressure detection unit 3. The gas pressure detection unit 3 can monitor the hydrogen pressure in the gas storage container 2 in real time, thereby indirectly determining the remaining hydrogen in the gas storage container 2. The gas pressure detection unit 3 can use a pressure sensor to accurately measure the hydrogen pressure in the gas storage container 2. Based on the preset hydrogen remaining threshold, the capacity of the current gas storage container 2 is determined.
[0026] The gas pipeline includes a main pipeline 41 and multiple branch pipelines 42, such as... Figure 1 As shown, one end of the main pipeline 41 is connected to the filling device 1, and the other end is connected to multiple branch pipelines 42. One end of each branch pipeline 42 is connected to the main pipeline 41, and the other end is connected to each gas storage container 2 in a corresponding manner. This ensures that each gas storage container 2 can be connected to the main pipeline 41 through an independent branch pipeline 42 to achieve hydrogen delivery. During the filling process, when the pressure detection unit 3 determines that the remaining hydrogen in the gas storage container 2 that is currently delivering hydrogen is insufficient, the hydrogen in other gas storage containers 2 enters the main pipeline 41 through their corresponding branch pipelines 42 and is delivered to the target container 14. Since the branch pipelines 42 correspond one-to-one with the gas storage containers 2, each gas storage container 2 can independently deliver hydrogen to the main pipeline 41 without interfering with each other. This not only improves the filling efficiency but also reduces the risk of production interruption due to the depletion of gas storage containers 2.
[0027] like Figure 1 As shown, each branch 42 is equipped with an intake valve 5. The intake valve 5 responds to the pressure detection unit 3. Specifically, when the pressure detection unit 3 detects that the pressure value of the gas storage container 2 is higher than a preset first threshold, the intake valve 5 corresponding to that gas storage container 2 can be opened, thereby allowing the hydrogen inside to be transported to the filling device 1 through the gas delivery pipeline 4. When the pressure detection unit 3 detects that the pressure value of a certain gas storage container 2 is lower than the first threshold, it closes the intake valve 5 corresponding to that gas storage container 2, and at the same time, opens the intake valves 5 corresponding to other gas storage containers 2 with pressure values higher than the first threshold, thereby realizing the supply of hydrogen. The automatic switching of the gas storage container 2 improves the filling efficiency and reduces the risk of production interruption due to the depletion of the gas storage container 2. The specific value of the first threshold should be determined according to different gas storage containers 2 and usage requirements. The first threshold should be set within the gas pressure range in which the gas storage container 2 can safely and stably provide enough hydrogen for the filling device 1. If the gas pressure value of the gas storage container 2 is lower than the first threshold, the operator should replace or refill it in time. The gas storage container 2 should be inspected and maintained regularly to ensure that it is always in good working condition and provides a stable hydrogen supply for the hydrogen filling device.
[0028] With the above structure, the hydrogen filling device provided by this utility model fills the target container 14 with hydrogen through the filling device 1. During filling, when the pressure detection unit 3 detects that the pressure value in the corresponding gas storage container 2 is higher than the first threshold, it opens the inlet valve 5. The hydrogen in the gas storage container 2 is then transported to the target container 14 through the gas delivery pipe and the inlet valve 5. When the pressure detection unit 3 detects that the pressure value in the corresponding gas storage container 2 is lower than the first threshold, the inlet valve 5 closes the corresponding gas storage container 2, thereby filling the target container 14 with a suitable gas storage container 2 that has sufficient hydrogen. Therefore, this hydrogen filling device can automatically switch the gas storage container 2 that delivers hydrogen by opening and closing the inlet valve 5 according to the pressure value of the gas storage container 2, thereby improving the filling efficiency.
[0029] An optional implementation of this embodiment is as follows: To facilitate the replacement of hydrogen storage gas with insufficient pressure, the hydrogen filling device further includes a gas supply chamber 6, such as... Figure 1 As shown, the gas supply chamber 6 is used to accommodate and fix the gas storage container 2. When replacing the gas storage container 2, the operator can operate in the gas supply chamber 6, which facilitates the replacement or refilling of the gas storage container 2 with insufficient gas pressure without having to shut down or disassemble the entire hydrogen filling device. The gas supply chamber 6 is used to isolate the gas storage container 2 from the external environment, reducing potential safety hazards. The operator can perform the replacement and maintenance of the gas storage container 2 more safely and conveniently.
[0030] An optional implementation of this embodiment is as follows: There are multiple air supply chambers 6, such as... Figure 1 As shown, each gas supply chamber 6 has at least one gas storage container 2. The gas storage containers 2 are separated by multiple gas supply chambers 6. When the hydrogen in the gas storage container 2 in one gas supply chamber 6 is exhausted, it can be immediately switched to another gas supply chamber 6 to continue supplying gas, thereby avoiding the problem of gas supply interruption, ensuring the continuity and stability of the hydrogen filling process, and improving work efficiency. At the same time, when replacing the gas storage container 2, the operator can operate in a relatively independent space, avoiding the need to replace it directly in the hydrogen transportation environment, thus reducing safety hazards.
[0031] An optional implementation of this embodiment is as follows: A first gas concentration detection unit 7 is installed in the gas supply chamber 6, such as... Figure 1As shown, the first gas concentration detection unit 7 can detect the hydrogen concentration in the gas supply chamber 6 in real time to ensure the safety and stability of the hydrogen filling process. When the hydrogen concentration in the gas supply chamber 6 rises abnormally, there may be hydrogen leakage or other safety hazards. The opening and closing status of the inlet valve 5 responds to the detection result of the first gas concentration detection unit 7. When the hydrogen concentration in the gas supply chamber 6 is higher than the preset second threshold, the inlet valve 5 is closed. At this time, the inlet valves 5 of all branches 42 connected to the gas storage container 2 in the gas supply chamber 6 will be closed to cut off the further supply of hydrogen, thereby reducing the risk of hydrogen leakage. The specific hydrogen concentration value of the second threshold should be determined according to different usage environments and usage requirements.
[0032] An optional implementation of this embodiment is as follows: To improve the safety of the hydrogen filling device and reduce the risk of hydrogen concentration in the gas supply chamber 6, the hydrogen filling device further includes a first fan 8, such as... Figure 1 As shown, the first fan 8 is installed in the gas supply chamber 6. The first fan 8 can be an explosion-proof fan. The first fan 8 responds to the first gas concentration detection unit 7. When the first gas concentration detection unit 7 detects that the hydrogen concentration in the gas supply chamber 6 is higher than the preset second threshold, the inlet valve 5 is closed, the first fan 8 is activated and starts to work. By accelerating the flow and diffusion of hydrogen in the gas supply chamber 6, the first fan 8 can effectively reduce the hydrogen concentration, thereby reducing hydrogen leakage and accumulation in the gas supply chamber 6, and providing operators with a safer and more reliable working environment.
[0033] An optional implementation of this embodiment is as follows: To improve the overall efficiency and safety of the hydrogen filling device, the hydrogen filling device further includes a filling chamber 9, such as... Figure 1 As shown, the inflation chamber 9 is an independent space used to install the inflation device 1. By installing the inflation device 1 in the independent inflation chamber 9, both can be operated and maintained independently. During the inflation process, the inflation device 1 in the inflation chamber 9 can focus on inflating the target container 14, while the gas storage container 2 in the gas supply chamber 6 is responsible for storing and supplying hydrogen. After the gas storage container 2 discharges hydrogen, the operator can replace or refill the gas storage container 2 with insufficient hydrogen without affecting the gas supply to the gas storage containers 2 in other gas supply chambers 6, or affecting the inflation device 1 in the inflation chamber 9 inflating the target container 14. This division of labor optimizes the hydrogen filling process and improves work efficiency. At the same time, it isolates the heat, vibration and noise that may be generated during the inflation process, so that the gas supply chamber 6 and the inflation chamber 9 do not interfere with each other.
[0034] An optional implementation of this embodiment is as follows: To improve the safety of the hydrogen filling device, such as... Figure 1As shown, this hydrogen filling device also includes a second gas concentration detection unit 10, which monitors the hydrogen concentration in the filling chamber 9. The opening and closing status of the inlet valve 5 responds to the detection result of the second gas concentration detection unit 10. When the hydrogen concentration in the filling chamber 9 is higher than a preset third threshold, the inlet valves 5 of all branches 42 connected to the filling chamber 9 are closed to cut off the further supply of hydrogen, thereby preventing the risk of hydrogen leakage and accumulation and improving the safety of the hydrogen filling process. The specific hydrogen concentration value of the third threshold should be determined according to different usage environments and usage requirements. A circuit breaker valve 16 is also installed on the main pipeline. The circuit breaker valve 16 responds to the second gas concentration detection unit 10. When the hydrogen concentration in the filling chamber 9 is higher than the preset third threshold, the circuit breaker valve 16 is closed to prevent hydrogen from continuing to be transported through the main pipeline, thereby reducing the further increase of hydrogen concentration in the filling chamber 9.
[0035] An optional implementation of this embodiment is as follows: To improve the safety of the hydrogen filling device, such as... Figure 1 As shown, this hydrogen filling device also includes a second blower 11, which is an air flow device. The second blower 11 can be an explosion-proof blower, used to accelerate the flow and diffusion of hydrogen in the filling chamber 9, thereby reducing the hydrogen concentration. The opening and closing state of the second blower 11 is in response to the detection result of the second gas concentration detection unit 10. When the hydrogen concentration in the filling chamber 9 is higher than a preset third threshold, the air inlet valve 5 is closed to cut off the further supply of hydrogen and trigger the start of the second blower 11. By accelerating the flow and diffusion of hydrogen in the filling chamber 9, the second blower 11 can effectively reduce the hydrogen concentration, thereby reducing the risk of hydrogen leakage and accumulation. More preferably, flame arresters can be installed on the main pipeline 41 and each branch pipeline 42 to block flames or high-temperature hydrogen from passing through. Pressure relief valves can be installed on the main pipeline 41 and each branch pipeline 42 to relieve pressure under abnormal high pressure in the hydrogen pipeline, thereby improving the safety of use.
[0036] An optional implementation of this embodiment is as follows: To improve the safety of the hydrogen filling device, such as... Figure 1As shown, this hydrogen filling device also includes a warning light 12, which is a visual alarm device. When an abnormal gas concentration is detected, it can alert the operator by emitting light and take corresponding measures. The number of warning lights 12 can be configured according to actual needs to ensure that the operator can clearly see the alarm signal when the gas concentration is abnormal. Specifically, when either the first gas concentration detection unit 7 or the second gas concentration detection unit 10 detects an abnormal gas concentration, the warning light 12 lights up and emits a corresponding alarm light to alert the operator that the gas concentration in the filling chamber 9 is abnormal. The warning light 12 is usually installed in an easily observable and identifiable location, such as a conspicuous location inside or outside the gas supply chamber 6 and the filling chamber 9, or within the operator's line of sight. In this way, once the gas concentration is abnormal, the operator can quickly notice the alarm signal and take corresponding countermeasures.
[0037] An optional implementation method of this embodiment is as follows: Figure 1 As shown, it also includes a buzzer 13, which is an audible alarm device. When an abnormal gas concentration is detected, it can emit a sound to alert the operator and prompt them to take appropriate measures. The sound of the buzzer 13 can be set to a specific frequency and pitch to ensure that the operator can clearly hear the alarm signal when the gas concentration is abnormal. Specifically, the buzzer 13 responds to the first gas concentration detection unit 7 or the second gas concentration detection unit 10. When the first gas concentration detection unit 7 in the gas supply chamber 6 detects that the gas concentration is higher than a preset second threshold, or when the second gas concentration detection unit 10 in the gas filling chamber 9 detects that the gas concentration is higher than a preset third threshold, the buzzer 13 will immediately emit an audible alarm to alert the operator that the gas concentration in the gas supply chamber 6 is abnormal and that there may be a gas leak or other safety hazards. The audible alarm can be a continuous buzzing sound or an intermittent alarm sound to attract the operator's attention. The frequency and pitch of the buzzer 13's audible alarm can be distinguished according to the gas concentration detected by the first gas concentration detection unit 7 or the second gas concentration detection unit 10 so that the operator can distinguish the source of the alarm.
[0038] In summary, the hydrogen filling device provided by this utility model fills the target container 14 with hydrogen through the filling device 1. During filling, when the pressure detection unit 3 detects that the pressure value in the corresponding gas storage container 2 is higher than the first threshold, the inlet valve 5 is opened, and the hydrogen in the gas storage container 2 is transported to the target container 14 through the gas delivery pipe and the inlet valve 5. When the pressure detection unit 3 detects that the pressure value in the corresponding gas storage container 2 is lower than the first threshold, the inlet valve 5 is closed, thereby filling the target container 14 with the gas storage container 2 with sufficient hydrogen. When the hydrogen concentration in the gas supply chamber 6 is higher than the preset second threshold or the hydrogen concentration in the filling chamber 9 is higher than the third threshold, the inlet valve 5 is closed. At the same time, the first fan 8 and the second fan 11 are started, the warning light 12 is lit, and the corresponding alarm light is emitted. The buzzer 13 will emit an audible alarm to remind the operator that the gas concentration in the filling chamber 9 is abnormal. Therefore, the hydrogen filling device can open and close the inlet valve 5 by adjusting the gas pressure of the gas storage container 2, thereby automatically switching the gas storage container 2 that transports hydrogen and improving the filling efficiency.
[0039] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A hydrogen filling device, characterized in that, include: Inflation device; Multiple gas storage containers, each equipped with a gas pressure detection unit, the gas storage containers being used to store hydrogen gas to be filled into the gas filling device; The gas pipeline includes a main pipeline and multiple branch pipelines, the multiple branch pipelines being connected to the main pipeline, the main pipeline being connected to the gas filling device, and the branch pipelines being corresponding to and connected to the gas storage container one by one; Each branch is provided with an air inlet valve, which responds to the air pressure detection unit to close the air inlet valve of the air storage container when the air pressure detection unit detects that the air pressure value of the air storage container is lower than a first threshold, and to open the air inlet valve of the air storage container when the air pressure detection unit detects that the air pressure value of the air storage container is higher than the first threshold.
2. The hydrogen filling device according to claim 1, characterized in that, Also includes: A gas supply chamber, wherein the gas storage container is disposed within the gas supply chamber.
3. The hydrogen filling device according to claim 2, characterized in that, There are multiple gas supply chambers, and each gas supply chamber is equipped with at least one gas storage container.
4. The hydrogen filling device according to claim 2, characterized in that, The gas supply chamber is equipped with a first gas concentration detection unit. The inlet valve responds to the first gas concentration detection unit to close the inlet valves of all branches connected to the gas storage container in the gas supply chamber when the hydrogen concentration in the gas supply chamber is higher than a second threshold.
5. The hydrogen filling device according to claim 4, characterized in that, Also includes: A first fan is installed in the gas supply chamber. The first fan responds to the first gas concentration detection unit to turn on the first fan to reduce the hydrogen concentration in the gas supply chamber when the hydrogen concentration in the gas supply chamber is higher than a second threshold.
6. The hydrogen filling device according to claim 4, characterized in that, Also includes: An inflation chamber, wherein the inflation device is installed in the inflation chamber.
7. The hydrogen filling device according to claim 6, characterized in that, The inflation chamber is equipped with a second gas concentration detection unit. The air inlet valve responds to the second gas concentration detection unit to close the air inlet valves of all branches when the hydrogen concentration in the inflation chamber is higher than a third threshold.
8. The hydrogen filling device according to claim 7, characterized in that, Also includes: A second fan is installed in the inflation chamber. The second fan responds to the second gas concentration detection unit to turn on the second fan to reduce the hydrogen concentration in the inflation chamber when the hydrogen concentration in the inflation chamber is higher than a third threshold.
9. The hydrogen filling device according to claim 7, characterized in that, Also includes: The warning light is activated in response to the first gas concentration detection unit and the second gas concentration detection unit. The warning light is activated when the first gas concentration detection unit detects a concentration higher than a second threshold or the second gas concentration detection unit detects a concentration higher than a third threshold.
10. The hydrogen filling device according to claim 7, characterized in that, Also includes: The buzzer is responsive to the first gas concentration detection unit and the second gas concentration detection unit. When the first gas concentration detection unit detects a concentration higher than a second threshold or the second gas concentration detection unit detects a concentration higher than a third threshold, the buzzer is activated.