Hydrogen-related environment chamber

Abstract

The invention relates to a hydrogen-related environmental chamber, which comprises a hydrogen-related environmental chamber body, the hydrogen-related environmental chamber body is provided with a sample test chamber, and the sample test chamber is internally provided with a hydrogen concentration sensor and an oxygen concentration sensor; one end of the air inlet pipeline is communicated with the sample testing chamber, the air inlet pipeline is provided with an air stop valve and an inert gas stop valve, and the air stop valve and the inert gas stop valve are communicated in parallel; one end of the exhaust pipeline is communicated with the sample testing chamber, and the exhaust pipeline is provided with an exhaust stop valve. Compared with a fresh air dilution method, the use of the inert gas is more efficient, especially during large-scale leakage, the dangerous situation can be rapidly controlled, the improved scheme can effectively deal with large-scale hydrogen leakage, the explosion risk is remarkably reduced, the use of the inert gas is more efficient, and the use amount of fresh air can be reduced.

Description

Technical Field

[0001] The present application relates to the field of hydrogen-related environmental testing, and specifically to a hydrogen-related environmental chamber. Background Art

[0002] Hydrogen is a colorless, odorless, chemically active, and highly flammable gas with a wide explosion range and low ignition energy. The explosion limit of hydrogen in air is 4.0% to 75.6%, and the minimum ignition energy in air is only 0.019mJ.

[0003] In related technologies, with the rapid development of the hydrogen energy industry, the demand for hydrogen-related environmental testing has increased rapidly. Faced with hydrogen, which has active chemical properties and is highly flammable, traditional hydrogen-related environmental chambers often use fresh air dilution as a hydrogen-related explosion-proof method. When a hydrogen leak is detected, this method reduces the volume concentration of hydrogen by introducing a large amount of fresh air to maintain it below the lower explosion limit of hydrogen (4.0%), and reduces the risk of hydrogen explosion by controlling the concentration of hydrogen through forced ventilation.

[0004] However, when faced with hydrogen leaks, traditional hydrogen-related environmental chambers still have the risk of explosion due to the limited dilution effect of fresh air. Summary of the Invention

[0005] The present application provides a hydrogen-related environmental chamber, which can solve the problem that in the case of hydrogen leakage, traditional hydrogen-related environmental chambers still have the risk of explosion due to the limited dilution effect of fresh air.

[0006] The present invention provides a hydrogen environment chamber, which includes:

[0007] A hydrogen-related environmental chamber body, wherein the hydrogen-related environmental chamber body is provided with a sample test chamber, wherein a hydrogen concentration sensor and an oxygen concentration sensor are installed in the sample test chamber;

[0008] An air inlet pipeline, one end of which is connected to the sample testing chamber, the air inlet pipeline being equipped with an air shut-off valve and an inert gas shut-off valve, the air shut-off valve and the inert gas shut-off valve being connected in parallel;

[0009] An exhaust pipeline, one end of which is connected to the sample testing chamber, and an exhaust stop valve is installed in the exhaust pipeline.

[0010] In one embodiment, the hydrogen-related environment chamber further comprises:

[0011] A temperature and humidity circulation regulating system, wherein the output end and the input end of the temperature and humidity circulation regulating system are communicated with the sample testing chamber.

[0012] In one embodiment, the temperature and humidity cycle control system includes:

[0013] A circulating air duct, the output end and the input end of the circulating air duct are communicated with the sample test chamber;

[0014] A dehumidifier, the dehumidifier is installed in the circulating air duct.

[0015] In one embodiment, the temperature and humidity circulation regulation system further includes:

[0016] A water collecting tray, the water collecting tray is communicated with the dehumidifier.

[0017] In one embodiment, the temperature and humidity circulation regulation system further includes:

[0018] A first circulating fan and a second circulating fan, the first circulating fan and the second circulating fan are installed in the circulating air duct.

[0019] In one embodiment, the temperature and humidity circulation regulation system further includes:

[0020] A refrigeration system, the refrigeration evaporator of the refrigeration system is installed in the circulating air duct.

[0021] In one embodiment, the temperature and humidity circulation regulation system further includes:

[0022] A humidifier, the humidifier is installed in the circulating air duct.

[0023] In one embodiment, the temperature and humidity circulation regulation system further includes:

[0024] A heater, the heater is installed in the circulating air duct.

[0025] In one embodiment, an inflation device is installed on the intake pipeline, and an exhaust fan and a check valve are installed on the exhaust pipeline.

[0026] In one embodiment, a temperature sensor, a pressure sensor and a humidity sensor are installed in the sample test chamber.

[0027] The beneficial effects brought by the technical solutions provided by the embodiments of the present application include:

[0028] When conducting hydrogen-related tests, after the sample is installed, close the hatch. At this time, a sealed environment is formed inside the chamber, which is not connected to the outside. Replace the air inside the chamber with inert gas by means of the intake pipeline and the inert gas isolation valve, and then close the exhaust pipeline. Start the temperature and humidity circulation regulation system to control the temperature and humidity of the gas inside the chamber. When the environmental conditions inside the chamber meet the requirements, the hydrogen-related test can be started. Since hydrogen is extremely flammable and explosive in air, but it cannot burn or explode in an inert gas environment due to the lack of an oxidizer. At the same time, hydrogen will not react with the inert gas under the temperature, humidity, and pressure conditions that the environmental chamber can reach. Therefore, it is safe to conduct hydrogen-related tests after the environmental chamber is filled with inert gas. Even if hydrogen leaks, it will not cause combustion or explosion, achieving safety and explosion protection. The method adopted in this application is to fill the inside of the environmental chamber with inert gas during operation to achieve hydrogen explosion protection. Since hydrogen cannot burn or explode in an inert gas environment, even if hydrogen leaks inside the environmental chamber, there will be no risk of combustion or explosion, fundamentally solving the risk of combustion and explosion caused by hydrogen leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 It is a schematic diagram of the internal structure of a hydrogen-related environmental chamber.

[0031] In the figure: 1. Hydrogen-related environmental chamber body; 101. Sample test chamber; 102. Hatch; 2. Hydrogen concentration sensor; 3. Oxygen concentration sensor; 4. Intake pipeline; 5. Air isolation valve; 6. Inert gas isolation valve; 7. Exhaust pipeline; 8. Exhaust isolation valve; 9. Temperature and humidity circulation regulation system; 901. Circulation air duct; 902. Dehumidifier; 903. Water collection tray; 904. First circulation fan; 905. Second circulation fan; 906. Refrigeration system; 9061. Refrigeration evaporator; 907. Humidifier; 908. Heater; 10. Inflation device; 11. Exhaust fan; 12. Check valve; 13. Temperature sensor; 14. Pressure sensor; 15. Humidity sensor; 16. Test sample. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0033] The embodiment of this application provides a hydrogen-related environment chamber, which can solve the problem that there is still an explosion risk in the traditional hydrogen-related environment chamber due to the limited fresh air dilution effect in the face of hydrogen leakage.

[0034] As Figure 1 shown, the embodiment of this application provides a hydrogen-related environment chamber, which includes: a hydrogen-related environment chamber body 1. A sample test chamber 101 is provided in the hydrogen-related environment chamber body 1. The test sample is placed in the sample test chamber 101. A hydrogen concentration sensor 2 and an oxygen concentration sensor 3 are installed in the sample test chamber 101; an intake pipeline 4, one end of the intake pipeline 4 is communicated with the sample test chamber 101. An air shut-off valve 5 and an inert gas shut-off valve 6 are installed on the intake pipeline 4, and the air shut-off valve 5 and the inert gas shut-off valve 6 are connected in parallel; an exhaust pipeline 7, one end of the exhaust pipeline 7 is communicated with the sample test chamber 101. An exhaust shut-off valve 8 is installed on the exhaust pipeline 7.

[0035] In this embodiment, a hydrogen concentration sensor 2 and an oxygen concentration sensor 3 are installed in the sample test chamber 101 of the hydrogen-related environment chamber body 1. This improvement realizes the real-time monitoring of the hydrogen and oxygen concentrations in the chamber, provides data support for timely response to hydrogen leakage, and can also monitor the oxygen concentration to provide oxygen concentration data support when personnel enter and exit the chamber to avoid risks such as asphyxiation of personnel. At the same time, it also avoids the explosion risk caused by the entry of oxygen into the chamber due to the leakage of the chamber body in some extreme cases, resulting in hydrogen leakage in the hydrogen-related test chamber. When conducting a hydrogen-related test, after the sample is installed, a closed environment is formed in the chamber and is not connected to the outside. The gas in the chamber is replaced with an inert gas through the intake pipeline and the inert gas cut-off valve, and then the exhaust pipeline is closed. When the chamber environment meets the requirements, the hydrogen-related test can be started. Since hydrogen is extremely flammable and explosive in air, but hydrogen cannot burn and explode in an inert gas environment due to the lack of an oxidant, it is safe to conduct a hydrogen-related test after the environment chamber is filled with an inert gas. Even if hydrogen leakage occurs, it will not cause combustion and explosion, achieving safe explosion protection. The method of filling the inside of the environment chamber with an inert gas during operation is used to achieve hydrogen explosion protection. Since hydrogen cannot burn and explode in an inert gas environment, even if hydrogen leakage occurs in the environment chamber, there will be no risk of combustion and explosion, fundamentally solving the combustion and explosion risk brought by hydrogen leakage. An exhaust cut-off valve 8 is installed on the exhaust pipeline 7, so that the gas discharge in the chamber can be precisely controlled. In an emergency, the exhaust cut-off valve 8 can be quickly opened to accelerate the discharge of the gas in the chamber, further shortening the time for the hydrogen concentration to drop to the safe range. By monitoring the hydrogen concentration in real time and responding quickly.

[0036] In one embodiment, as Figure 1 shown, the hydrogen-related environment chamber further includes: a temperature and humidity circulation regulation system 9, and the output end and the input end of the temperature and humidity circulation regulation system 9 are communicated with the sample test chamber 101.

[0037] In this embodiment, the temperature and humidity circulation regulation system 9 in the hydrogen-related environment chamber is a system communicated with the sample test chamber 101, and is used to regulate the temperature and humidity in the chamber. The temperature and humidity circulation regulation system 9 sends the gas with appropriate regulated temperature and humidity into the sample test chamber 101 through its output end. At the same time, its input end is communicated with the sample test chamber 101, and the gas in the chamber can be extracted for circulation regulation to ensure that the chamber environment meets specific test requirements. Such a design enables the hydrogen-related environment chamber to provide a stable and controllable temperature and humidity environment during the hydrogen-related test, thereby improving the accuracy and reliability of the test.

[0038] In one embodiment, as Figure 1As shown in the figure, the temperature and humidity circulation regulation system 9 includes: a circulation air duct 901, the output end and the input end of the circulation air duct 901 are communicated with the sample test chamber 101; a dehumidifier 902, the dehumidifier 902 is installed in the circulation air duct 901. Exemplarily, the dehumidifier 902 is installed near the input port of the circulation air duct 901.

[0039] In this embodiment, in the temperature and humidity circulation regulation system 9 of the hydrogen-containing environment chamber, the circulation air duct 901 is responsible for the circulation of gas, while the dehumidifier 902 is used to regulate the humidity in the chamber. As the core component of the temperature and humidity circulation regulation system, both the output end and the input end of the circulation air duct 901 are connected to the sample test chamber 101. In this way, the circulation air duct 901 can extract the gas in the chamber, and after being processed, send it back into the chamber to form a closed circulation system. This design helps to maintain the stability and consistency of the chamber environment. The dehumidifier 902 is installed in the circulation air duct 901, and its main function is to remove the excess moisture in the circulating gas, thereby regulating the humidity in the chamber. When the humidity in the chamber is too high, the dehumidifier 902 will start to work, absorb and remove the moisture in the circulating gas, and reduce the humidity in the chamber to the set range. In this way, it can be ensured that when the hydrogen-containing environment chamber conducts hydrogen-containing tests, the humidity environment in the chamber meets specific test requirements. To sum up, the temperature and humidity circulation regulation system 9 realizes the precise control of the temperature and humidity in the hydrogen-containing environment chamber through the coordinated work of the circulation air duct 901 and the dehumidifier 902, providing a stable and controllable environmental condition for the hydrogen-containing test.

[0040] In one embodiment, as Figure 1 shown, the temperature and humidity circulation regulation system 9 further includes: a water accumulation tray 903, the water accumulation tray 903 is installed outside the hydrogen-containing environment chamber body 1 and is communicated with the dehumidifier 902.

[0041] In this embodiment, in the temperature and humidity circulation regulation system 9 of the hydrogen-containing environment chamber, a water accumulation tray 903 communicated with the dehumidifier 902 is included. The main function of the water accumulation tray 903 is to collect the condensed water generated by the dehumidifier 902 during the dehumidification process. When the circulating gas passes through the dehumidifier 902, the moisture in it will be condensed into liquid water, and then these liquid waters will flow into the water accumulation tray 903. The design of the water accumulation tray 903 ensures that the condensed water can be effectively collected, avoiding problems that may be caused by the random flow of condensed water in the system, such as corroding equipment and affecting system performance. In addition, the water accumulation tray 903 needs to be cleaned regularly to prevent problems such as overflow or bacteria breeding caused by excessive water accumulation. This design detail reflects the comprehensiveness and meticulousness of the hydrogen-containing environment chamber in temperature and humidity regulation, ensuring the stability and reliability of the chamber environment.

[0042] In one embodiment, as Figure 1As shown, the temperature and humidity circulation regulation system 9 further includes: a first circulation fan 904 and a second circulation fan 905, which are installed in the circulation air duct 901.

[0043] In this embodiment, the main functions of the first circulation fan 904 and the second circulation fan 905 are to promote the flow of the gas in the circulation air duct 901, thereby accelerating the regulation process of the temperature and humidity in the cabin. By the rotation of the fans, a certain air flow can be generated, enabling the gas in the cabin to be continuously extracted and passed through processing equipment such as the dehumidifier 902, and then returned to the cabin. Such a circulation process helps to maintain the stability and consistency of the cabin environment. In addition, the coordinated operation of the first circulation fan 904 and the second circulation fan 905 can also improve the efficiency of temperature and humidity regulation. When the cabin environment needs to be adjusted quickly, the rotation speed of the fans can be increased to accelerate the gas circulation speed, so as to reach the target temperature and humidity faster. Conversely, when the cabin environment is close to the target value, the rotation speed of the fans can be appropriately reduced to reduce energy consumption and maintain the stability of the cabin environment.

[0044] In one implementation, as Figure 1 shown, the temperature and humidity circulation regulation system 9 further includes: a refrigeration system 906, and the refrigeration evaporator 9061 of the refrigeration system 906 is installed in the circulation air duct 901, and the refrigeration evaporator 9061 can be installed between the first circulation fan 904 and the second circulation fan 905.

[0045] In this embodiment, such a design enables the refrigeration evaporator 9061 to directly cool the gas in the circulation air duct 901, thereby effectively regulating the temperature in the cabin. The refrigeration evaporator 9061 absorbs the heat in the circulating gas, reduces its temperature, and then returns the cooled gas to the cabin to achieve the effect of cooling. In addition, the addition of the refrigeration system 906 enhances the functionality and flexibility of the temperature and humidity circulation regulation system 9. It can not only work in coordination with components such as the dehumidifier 902 and the circulation fans to jointly maintain the stability and consistency of the cabin environment, but also independently adjust the temperature in the cabin according to actual needs to meet different test requirements.

[0046] In one implementation, as Figure 1 shown, the temperature and humidity circulation regulation system 9 further includes: a humidifier 907, and the humidifier 907 is installed in the circulation air duct 901, and the humidifier 907 is installed near the output port of the circulation air duct 901.

[0047] In this embodiment, the temperature and humidity circulation regulation system 9 includes a humidifier 907, and the humidifier 907 is installed in the circulation air duct 901. Such a design enables the humidifier 907 to directly humidify the gas in the circulation air duct 901, thereby effectively regulating the humidity in the cabin. When the ambient humidity in the cabin is lower than the target value, the humidifier 907 will be activated, increasing its humidity by releasing water vapor into the circulating gas, and then sending the humidified gas back into the cabin to achieve the effect of humidification. In addition, the combination of the humidifier 907 and the circulation air duct 901 also improves the overall performance and efficiency of the temperature and humidity circulation regulation system 9. It can not only work in coordination with components such as the refrigeration system 906 and the dehumidifier 902 to jointly maintain the stability and consistency of the cabin environment, but also independently adjust the humidity in the cabin according to actual needs to meet different test or application requirements.

[0048] In one embodiment, as Figure 1 shown, the temperature and humidity circulation regulation system 9 further includes: a heater 908, the heater 908 is installed in the circulation air duct 901, and the heater 908 is located between the second circulation fan 905 and the refrigeration evaporator 9061.

[0049] In this embodiment, such a design enables the heater 908 to directly heat the gas in the circulation air duct 901, thereby effectively regulating the temperature in the cabin. When the ambient temperature in the cabin is lower than the target value, the heater 908 will be activated, increasing its temperature by releasing heat into the circulating gas, and then sending the heated gas back into the cabin to achieve the effect of temperature increase. The addition of the heater 908 further enhances the functionality and flexibility of the temperature and humidity circulation regulation system 9. It can not only work in coordination with components such as the refrigeration system 906, the dehumidifier 902, and the humidifier 907 to jointly maintain the stability and consistency of the cabin environment, but also independently adjust the temperature in the cabin according to actual needs to meet different test or application requirements. For example, when testing specific environmental conditions such as high temperature and high humidity or low temperature and low humidity are required, the heater 908 can cooperate with other components to precisely control the temperature and humidity in the cabin to ensure the accuracy and reliability of the test results.

[0050] In one embodiment, as Figure 1 shown, an inflation device 10 is installed on the intake pipeline 4, and an exhaust fan 11 and a check valve 12 are installed on the exhaust pipeline 7.

[0051] In this embodiment, the inflation device 10 is installed in the intake pipeline 4, which can provide a stable gas source for the system and ensure that the gas pressure in the system is maintained within the required range. This is particularly important for systems that require precise control of gas pressure and flow rate. The exhaust fan 11 on the exhaust pipeline 7 is responsible for discharging the gas in the system to maintain the gas flow and renewal in the system. The operation of the exhaust fan 11 can ensure that the gas in the system does not accumulate or stagnate, thus keeping the system clean and operating efficiently. In addition, a check valve 12 is installed on the exhaust pipeline 7. The main function of the check valve 12 is to prevent gas backflow, that is, to prevent the gas in the system from flowing back into the system when the exhaust fan 11 stops working or fails. This can not only protect the system from damage caused by gas backflow, but also ensure the safety and stability of the system.

[0052] In one embodiment, as Figure 1 shown, a temperature sensor 13, a pressure sensor 14, and a humidity sensor 15 are installed in the sample test chamber 101.

[0053] In this embodiment, the temperature sensor 13 can measure the temperature in the chamber in real time to ensure that the temperature is controlled within the required range, which is crucial for many tests that require specific temperature conditions. The pressure sensor 14 is used to monitor the gas pressure in the chamber to ensure that the pressure conditions meet the test requirements, especially in tests involving gas exchange or pressure changes. The humidity sensor 15 is responsible for measuring the humidity level in the chamber, which is particularly important for test environments that require humidity control.

[0054] In one embodiment, as Figure 1 shown, the hydrogen-related environment chamber body 1 is equipped with a chamber door 102.

[0055] In summary, the working principle of this application is fully described here:

[0056] I. When conducting a conventional non-hydrogen-related test

[0057] After placing the test sample 16 into the sample test chamber 101 through the hatch 102, close the hatch 102. Since it is a conventional non-hydrogen-related environment test and there is no risk of hydrogen leakage in the chamber, there is no need to perform an inert gas replacement operation on the environmental chamber. At this time, the intake and exhaust pipelines can be closed by closing the relevant stop valves on the intake pipeline 4 and the exhaust pipeline 7, thereby closing the air and inert gas supply. Set the relevant indicators of the environmental chamber to the required environmental conditions, and start the temperature and humidity circulation regulation system 9. At this time, the first circulation fan 904 and the second circulation fan 905 start to work, sucking the gas in the sample test chamber 101 into the temperature and humidity circulation regulation system 9 for temperature and humidity adjustment and then sending it back to the sample test chamber 101 again, so that the environment in the sample test chamber 101 meets the set indicators. The temperature and humidity circulation regulation system 9 adjusts the humidity of the gas in the chamber in real time through the dehumidifier 902 and the humidifier 907, monitors the humidity index in the sample test chamber 101 through the humidity sensor 15 installed at the top of the sample test chamber 101, and forms a closed-loop circuit with the temperature and humidity circulation regulation system 9 to more quickly and accurately adjust and control the humidity of the gas in the chamber. The temperature and humidity circulation regulation system 9 adjusts the temperature of the gas in the chamber in real time through the refrigeration system 906 and the heater 908, monitors the temperature index in the sample test chamber 101 through the temperature sensor 13 installed at the top of the sample test chamber 101 and forms a closed-loop circuit with the temperature and humidity circulation regulation system 9 to more quickly and accurately adjust and control the temperature of the gas in the chamber.

[0058] II. When performing a hydrogen-related test

[0059] After placing the test sample 16 into the sample test chamber 101 through the hatch 102, close the hatch 102. Since the hydrogen-related environmental chamber body 1 is a sealed chamber body, after closing the hatch 102, it can be ensured that the environment inside the chamber is not connected to the outside of the chamber, ensuring the stability and sealing of the environment inside the chamber.

[0060] Before the test starts, first purge and displace the hydrogen-related environmental chamber body 1 with inert gas. Shut off the exhaust shut-off valve 8 to close the exhaust pipe 7, open the inert gas shut-off valve 6, and shut off the air shut-off valve 5 to open the intake pipe 4. Fill the inside of the hydrogen-related environmental chamber body 1 with inert gas of a certain volume and pressure through the charging device 10. Then shut off the inert gas shut-off valve 6 and the air shut-off valve 5 to close the intake pipe 4, open the exhaust shut-off valve 8 and the exhaust fan 11 to open the exhaust pipe 7, and discharge the mixed gas in the chamber. Repeat the above process multiple times until the oxygen concentration sensor 3 in the chamber monitors that the oxygen concentration in the chamber is close to zero, then stop the inert gas purge and displacement. Then, fill the environmental chamber with inert gas for protective gas. Shut off the exhaust shut-off valve 8 and the exhaust fan 11 to close the exhaust pipe 7, open the inert gas shut-off valve 6, and shut off the air shut-off valve 5 to open the intake pipe 4. Fill the inside of the environmental chamber with inert gas of a certain volume and pressure through the charging device 10, and ensure that the inert gas pressure in the chamber is within one standard atmosphere or within the gas pressure range required by the test. After the inert gas pressure in the chamber is within the gas pressure range required by the test, shut off the inert gas shut-off valve 6 and the air shut-off valve 5 to close the intake pipe 4, so that the environment inside the chamber is not connected to the environment outside the chamber, and ensure the independent stability of the environment inside the chamber.

[0061] During the test, start the environmental chamber according to the temperature and humidity indicators required by the test. At this time, the first circulation fan 904 and the second circulation fan 905 start to work, draw the gas inside the sample test chamber 101 into the circulation air duct 901 of the temperature and humidity circulation regulation system 9, and then pass through the dehumidifier 902, the refrigeration system 906, the heater 908, and the humidifier 907 for temperature and humidity regulation, and then send it back to the sample test chamber 101. During this process, monitor the environmental temperature and humidity indicators inside the sample test chamber 101 through the temperature sensor 13, pressure sensor 14, and humidity sensor 15 installed at the top of the sample test chamber 101, and form a closed-loop circuit with the temperature and humidity circulation regulation system 9 to more quickly and accurately adjust and control the temperature and humidity of the gas in the chamber, so that the environment inside the sample test chamber 101 meets the set indicators.

[0062] After the test, first, purge and replace the air in the environmental chamber. Close the test sample 16, cut off the hydrogen supply source of the test sample 16, and close the temperature and humidity circulation control system 9. Keep the intake pipeline 4 closed. Open the exhaust shut-off valve 8 to open the exhaust pipeline 7, and turn on the exhaust fan 11 to exhaust the anaerobic inert gas in the chamber outside the chamber. When the gas pressure in the chamber drops to the lowest air pressure that the exhaust fan 11 can create, turn off the exhaust shut-off valve 8 and turn off the exhaust fan 11 to close the exhaust pipeline 7. At this time, open the air shut-off valve 5 and turn off the inert gas shut-off valve 6 to open the intake pipeline 4. Fill the inside of the environmental chamber with air of a certain volume and pressure through the inflation device 10. Then turn off the inert gas shut-off valve 6 and turn off the air shut-off valve 5 to close the intake pipeline 4. Open the exhaust shut-off valve 8 and turn on the exhaust fan 11 again to open the exhaust pipeline 7 to exhaust the mixed gas in the chamber. Repeat the above process multiple times until the oxygen concentration sensor 3 in the chamber monitors that the oxygen concentration in the chamber is close to the oxygen concentration in the air, and then stop the air replacement. Finally, turn off all components and open the chamber door 102 to take out the test sample 16.

[0063] During this process, since the inside of the environmental chamber is filled with inert gas and is isolated from the external environment, the inside of the environmental chamber is always in a state of protection by anaerobic inert gas. Hydrogen cannot burn and explode in an inert gas environment. Therefore, even if there is any scale of hydrogen leakage inside the environmental chamber, it will not cause the risk of combustion and explosion.

[0064] III. When hydrogen leakage occurs inside the chamber during a hydrogen-related test

[0065] When the hydrogen concentration sensor 2 installed at the top of the sample test chamber 101 detects hydrogen leakage inside the chamber, a comprehensive judgment can be made based on the hydrogen leakage amount and the working state of the sample. Usually, when the hydrogen leakage is small, it is generally due to the loose connection of the pipeline interface, which does not affect the test. At this time, since the inside of the chamber is already an inert gas environment, the hydrogen leakage will not explode either, and the test can continue. If it is a traditional environmental chamber, it will be necessary to stop the machine for maintenance at this time; when the hydrogen leakage is large, it is generally due to pipeline damage, etc. At this time, the pipeline pressure will decrease, resulting in insufficient sample pressure and the sample cannot operate. Therefore, it is necessary to stop the machine, and the test can be stopped according to the hydrogen leakage shutdown handling method.

[0066] First, purge and replace the environmental chamber with inert gas, cut off the hydrogen source supply of the test sample 16 to ensure that no new hydrogen enters the chamber. Shut down the test sample 16 according to the sample shutdown operation steps. Keep the inert gas shut-off valve 6 and the air shut-off valve 5 in the off state to ensure that the intake pipe 4 is closed. Open the exhaust shut-off valve 8 to open the exhaust pipe 7. Turn on the exhaust fan 11 to exhaust the hydrogen-containing gas in the chamber outside the chamber. When the gas pressure in the chamber drops to the lowest air pressure that the exhaust fan 11 can create, shut off the exhaust shut-off valve 8 and turn off the exhaust fan 11 to close the exhaust pipe 7. At this time, open the inert gas shut-off valve 6 and shut off the air shut-off valve 5 to open the intake pipe 4. Fill a certain volume and pressure of inert gas into the environmental chamber through the filling device 10. Then shut off the inert gas shut-off valve 6 and shut off the air shut-off valve 5 to close the intake pipe 4. Open the exhaust shut-off valve 8 and turn on the exhaust fan 11 again to open the exhaust pipe 7 and discharge the mixed gas in the chamber. Repeat the above process multiple times until the hydrogen concentration sensor 2 in the chamber monitors that the hydrogen concentration in the chamber is close to zero, and then stop the inert gas purge and replacement.

[0067] Then, purge and replace the environmental chamber with air. When it is ensured that no new hydrogen leaks in the chamber and the current hydrogen concentration in the chamber is close to zero, perform air purge and replacement on the chamber. Open the air shut-off valve 5 and shut off the inert gas shut-off valve 6 to open the intake pipe 4. Fill a certain volume and pressure of air into the environmental chamber through the filling device 10. Then shut off the inert gas shut-off valve 6 and shut off the air shut-off valve 5 to close the intake pipe 4. Open the exhaust shut-off valve 8 and turn on the exhaust fan 11 again to open the exhaust pipe 7 and discharge the mixed gas in the chamber. Repeat the above process multiple times at this time until the oxygen concentration sensor 3 in the chamber monitors that the oxygen concentration in the chamber is close to the oxygen concentration in the air, and then stop the air replacement. Finally, turn off all components, open the chamber door 102, and take out the test sample.

[0068] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0069] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0070] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A hydrogen-related environmental chamber, characterized in that, It includes: A hydrogen-related environment chamber body (1), the hydrogen-related environment chamber body (1) is provided with a sample test chamber (101), and a hydrogen concentration sensor (2) and an oxygen concentration sensor (3) are installed in the sample test chamber (101); An intake pipeline (4), one end of the intake pipeline (4) is communicated with the sample test chamber (101), an air shut-off valve (5) and an inert gas shut-off valve (6) are installed on the intake pipeline (4), and the air shut-off valve (5) and the inert gas shut-off valve (6) are connected in parallel; An exhaust pipeline (7), one end of the exhaust pipeline (7) is communicated with the sample test chamber (101), and an exhaust shut-off valve (8) is installed on the exhaust pipeline (7).

2. The hydrogen-related environment chamber according to claim 1, wherein The hydrogen-related environment chamber further includes: A temperature and humidity circulation regulation system (9), the output end and the input end of the temperature and humidity circulation regulation system (9) are communicated with the sample test chamber (101).

3. The hydrogen-related environment chamber according to claim 2, wherein The temperature and humidity circulation regulation system (9) includes: A circulation air duct (901), the output end and the input end of the circulation air duct (901) are communicated with the sample test chamber (101); A dehumidifier (902), the dehumidifier (902) is installed in the circulation air duct (901).

4. The hydrogen-related environment chamber according to claim 3, wherein The temperature and humidity circulation regulation system (9) further includes: A water accumulation tray (903), the water accumulation tray (903) is communicated with the dehumidifier (902).

5. The hydrogen-related environment chamber according to claim 3, wherein The temperature and humidity circulation regulation system (9) further includes: A first circulation fan (904) and a second circulation fan (905), the first circulation fan (904) and the second circulation fan (905) are installed in the circulation air duct (901).

6. The hydrogen-related environment chamber according to claim 3, wherein The temperature and humidity circulation regulation system (9) further includes: A refrigeration system (906), a refrigeration evaporator (9061) of the refrigeration system (906) is installed in the circulation air duct (901).

7. The hydrogen-related environment chamber according to claim 3, wherein The temperature and humidity circulation regulation system (9) further includes: A humidifier (907), the humidifier (907) is installed in the circulation air duct (901).

8. The hydrogen-related environment chamber according to claim 3, wherein The temperature and humidity circulation regulation system (9) further includes: A heater (908), the heater (908) is installed in the circulation air duct (901).

9. The hydrogen-related environment chamber according to claim 1, wherein An inflation device (10) is installed on the intake pipeline (4), and an exhaust fan (11) and a check valve (12) are installed on the exhaust pipeline (7).

10. The hydrogen-related environment chamber according to claim 1, wherein A temperature sensor (13), a pressure sensor (14), and a humidity sensor (15) are installed in the sample test chamber (101).

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