Hydrogen preservation box and hydrogen generation method

Abstract

The invention relates to the technical field of hydrogen preservation, in particular to a hydrogen preservation box and a hydrogen production method, the hydrogen preservation box comprises a detachable protective outer frame, a sealing door, a hydrogen production main body and a storage preservation main body, the hydrogen production main body is fixedly connected to the bottom end of the storage preservation main body, and the detachable protective outer frame is fixedly mounted on the hydrogen production main body and the storage preservation main body through bolts. Food can be conveniently stored in a classified mode through the arranged storage fresh-keeping main body, taking and placing are convenient, hydrogen can be conveyed into the storage fresh-keeping main body through the arranged hydrogen production main body for fresh keeping, the hydrogen content of all areas in the storage fresh-keeping main body can be accurately detected, and the storage fresh-keeping effect is good. Therefore, the hydrogen generated in the hydrogen production main body can be accurately supplemented, so that the hydrogen content of each area in the storage and fresh-keeping main body meets the fresh-keeping requirement, and food placed in the storage and fresh-keeping main body can be stably subjected to fresh-keeping treatment for a long time.

Description

Technical Field

[0001] This invention relates to the field of hydrogen preservation technology, specifically a hydrogen preservation box and a method for generating hydrogen. Background Technology

[0002] Food preservation technologies mainly include low-temperature refrigeration, vacuum packaging, and chemical preservative treatment. Low-temperature refrigeration is energy-intensive and can easily cause food to freeze. Vacuum packaging has strict equipment requirements and cannot completely inhibit microbial growth. Chemical preservatives pose safety hazards. Hydrogen, as a reducing gas, has the potential to inhibit oxidation reactions and microbial activity, thus playing a role in preservation. However, existing technologies make it difficult to conveniently prepare hydrogen as needed and apply it rationally in the food preservation or transportation process, and the hydrogen concentration inside the container cannot be replenished in a timely manner, resulting in poor preservation effects. Therefore, it is necessary to develop a preservation box that integrates hydrogen storage and preparation functions, along with a corresponding hydrogen production method, to effectively maintain the hydrogen concentration inside the box, thereby achieving the preservation of stored fruits, vegetables, and other foods. Summary of the Invention

[0003] To address the problems in the prior art, the present invention provides a hydrogen preservation box and a method for generating hydrogen.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a hydrogen preservation box and a hydrogen generation method, comprising a detachable protective frame, a sealing door, a hydrogen production body, and a storage and preservation body. The hydrogen production body is fixedly connected to the bottom end of the storage and preservation body. The detachable protective frame is fixedly installed on the hydrogen production body and the storage and preservation body by bolts, and the hydrogen production body and the storage and preservation body are located inside the detachable protective frame. The sealing door is rotatably installed on the outer end of the detachable protective frame. The storage and preservation body includes a hydrogen detection and filling section, a longitudinal slot, a preservation box, a sliding placement platform, and a limiting support plate. Three limiting support plates are provided, and the three limiting support plates are evenly fixedly arranged inside the preservation box. The bottom end of the sliding placement platform is slidably engaged with the limiting support plate. The longitudinal slot is evenly opened through both sides of the preservation box. Three hydrogen detection and filling sections are provided, and the three hydrogen detection and filling sections are evenly distributed on the preservation box.

[0005] Preferably, the sides of the preservation box are evenly provided with transverse slots, and the transverse slots are located below the longitudinal slots. The sides of the preservation box are evenly fixedly installed with first electric push rods. The side end of the sliding placement platform is slidably engaged inside the transverse slots, and the front end of the first electric push rod is fixedly connected to the side end of the sliding placement platform. The outer side end of the sliding placement platform is fixedly installed with a partition protrusion.

[0006] Preferably, the detection hydrogenation unit includes a first fixed limiting plate, a first dual-head motor, a limiting plate, a first drive gear, a first moving toothed plate, an L-shaped fixed connecting frame, a conveying limiting tube, a first connecting tube, a nozzle, and a sliding block. The conveying limiting tubes are mirror-symmetrically distributed. The first connecting tube is fixedly connected to the outer end of the conveying limiting tube, and the nozzle communicates with the interior of the conveying limiting tube. The L-shaped fixed connecting frame is fixedly connected to the inner end of the conveying limiting tube. The limiting plates are symmetrically arranged. The inner end of the first moving toothed plate is slidably engaged with the interior of the limiting plate. The L-shaped fixed connecting frame is fixedly connected to the side end of the first moving toothed plate opposite to the limiting plate. The first dual-head motor is fixedly mounted on the first fixed limiting plate. The first drive gear is rotatably engaged with the first fixed limiting plate, and the drive end of the first dual-head motor is fixedly connected to the middle of the first drive gear. The first drive gear meshes with the first moving toothed plate. The sliding block is symmetrically fixedly connected to the inner side of the conveying limiting tube, and the nozzle is opened on the sliding block.

[0007] Preferably, hydrogen sensors are symmetrically fixedly installed on the conveying limiting pipe, and the hydrogen sensors are located on the sliding block. Circulating fans are uniformly fixedly installed inside the preservation box.

[0008] Preferably, the hydrogen production body includes fixed mounting bolts, a second connecting pipe, a fixed limiting frame, a first solenoid valve, a delivery pipe, a limiting slot, a storage tank, a second movable toothed plate, a fixed mounting plate, a PTC ceramic heating element, a storage tank, a sealing cap, a second dual-head motor, a second fixed limiting plate, a sliding plate, a second drive gear, a third connecting pipe, and a second solenoid valve. The fixed mounting bolts are evenly threaded into the fixed limiting frame. The limiting slot is formed on both sides of the fixed limiting frame. The fixed mounting plate is fixedly connected to the bottom of both sides of the PTC ceramic heating element and is fixedly installed at the bottom of the fixed limiting frame by bolts. The sliding plate is fixedly connected to both sides of the storage tank. The sealing cap is threaded in the middle of the outer end of the storage tank. The bottom surface of the storage tank is flush with the PTC ceramic heating element. The upper surface of the heating element is attached to the surface of the storage tank. The second moving toothed plate is fixedly installed on the upper sides of the storage tank by bolts. The storage tank is located directly above the storage tank. The conveying pipe is evenly fixedly installed on both sides of the storage tank. The first solenoid valve is fixedly installed on the upper part of the outer end of the conveying pipe. The second connecting pipe is fixedly connected to the first solenoid valve. The second solenoid valve is fixedly installed in the middle of the upper end and the middle of the bottom end of the storage tank. The third connecting pipe is fixedly installed in the middle of the second solenoid valve. The second fixed limiting plate is fixedly installed in the upper part of the fixed limiting frame. The second dual-head motor is fixedly installed on the second fixed limiting plate. The second drive gear is rotatably engaged on the second fixed limiting plate. The drive end of the second dual-head motor is fixedly connected to the middle of the second drive gear.

[0009] Preferably, the second drive gear meshes with the second movable gear plate, the conveying pipe is inserted through and fixedly positioned at the side of the fixed limiting frame, the storage tank is fixedly installed inside the upper part of the fixed limiting frame, and the sliding plate is slidably engaged with the limiting slot.

[0010] Preferably, the fixed limiting frame is fixedly connected to the bottom of the preservation box by the fixed mounting bolts, the third connecting pipe provided at the bottom of the storage tank is connected to the third connecting pipe provided at the top of the storage tank by a flexible hose, and the evenly distributed second connecting pipes are respectively connected to the first connecting pipes by flexible hoses.

[0011] Preferably, the sliding block is slidably disposed inside the longitudinal slot, the limiting plate and the first fixed limiting plate are fixedly installed on the preservation box, and the storage tank contains rare earth hydrogen storage material.

[0012] Preferably, pressure sensors are uniformly fixedly installed on both sides of the storage tank, and temperature sensors are uniformly fixedly installed on both sides of the upper end of the PTC ceramic heating element.

[0013] A method for generating hydrogen includes the following steps: S1. Material Preparation The rare earth hydrogen storage alloy (LaNi5 series) in the storage tank (37) was pretreated for 3 cycles in a 0.5MPa hydrogen atmosphere to form a stable hydride; S2, Start the hydrogen production reaction The PTC ceramic heating element (36) is heated to 50-80℃, triggering the decomposition of hydrogen in the alloy; The pressure sensor (32) monitors the pressure inside the storage tank (37) in real time and controls the temperature to keep the pressure stable at 0.3-0.5 MPa; S3, Hydrogen Collection and Temporary Storage Open the second solenoid valve between the storage tank and the storage tank, and the generated hydrogen gas is transported to the storage tank for temporary storage through the third connecting pipe. The pressure sensor monitors the hydrogen pressure in the storage tank in real time to ensure safe storage and timely replenishment. S4, Hydrogen is transferred to the preservation box. Based on the detection data from the hydrogen sensor inside the refrigerator, the corresponding first solenoid valve is opened, and hydrogen is delivered through the delivery pipe, the second connecting pipe, and the hose to the first connecting pipe of the hydrogen refueling unit, and finally injected into the designated area of ​​the refrigerator through the nozzle.

[0014] This invention has at least the following beneficial effects: I. This invention allows for convenient categorized storage and retrieval of food through its storage and preservation unit. The hydrogen generation unit supplies hydrogen to the storage and preservation unit for preservation, and the hydrogen content in each area within the unit can be precisely detected. This allows for precise replenishment of hydrogen generated by the hydrogen generation unit, ensuring that the hydrogen content in each area of ​​the storage and preservation unit meets preservation requirements. Consequently, food placed inside the storage and preservation unit can be stably preserved for an extended period.

[0015] II. This invention enables efficient and safe hydrogen production using rare-earth hydrogen storage materials, avoiding the risks associated with high-pressure hydrogen storage. Precise temperature control during heating ensures stable and safe reaction during hydrogen release. Intelligent gas management and precise regional hydrogen supply are achieved. A hydrogen sensor is linked to the hydrogen refueling unit, and a first dual-head motor drives the nozzle to move within a longitudinal slot, scanning and replenishing low-concentration areas. Once the hydrogen concentration reaches the target, the solenoid valve and heating automatically shut off, saving energy and reducing consumption. The modular and maintainable design allows for the sliding and disassembly of the storage tank, facilitating the replenishment or replacement of rare-earth hydrogen storage materials. The hydrogen production unit is bolted to the preservation box for quick separation during maintenance, improving preservation efficiency and enabling independent hydrogen supply to different zones. Each sliding placement platform corresponds to the detection and refueling unit, preventing insufficient concentration in certain areas due to fruit and vegetable stacking. A circulating fan provides forced convection, solving the problem of uneven hydrogen distribution caused by low hydrogen density. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and examples.

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the main body disassembly structure in this invention; Figure 3 This is a schematic diagram of the internal structure of the main body in this invention; Figure 4 This is a schematic diagram of the main structure for storage and preservation in this invention; Figure 5 This is a side-view perspective three-dimensional structural diagram of the storage and preservation body in this invention; Figure 6 This is a schematic diagram of the detection hydrogenation section in this invention; Figure 7 This is a schematic diagram of the main hydrogen production structure in this invention; Figure 8 This is a schematic diagram of the internal structure of the hydrogen production body in this invention; Figure 9 This is a schematic diagram showing the internal structure of the hydrogen production unit in this invention.

[0018] In the diagram: 1. Detachable protective frame; 2. Sealed door; 3. Hydrogen production main body; 4. Storage and preservation main body; 5. First electric push rod; 6. Horizontal slot; 7. Hydrogen detection and refueling section; 8. Vertical slot; 9. Preservation box; 10. Sliding placement platform; 11. Partition plate; 12. Limiting support plate; 13. First fixed limiting plate; 14. First dual-head motor; 15. Limiting plate; 16. First drive gear; 17. First moving gear plate; 18. L-shaped fixed connecting frame; 19. Conveying limiting pipe; 20. First connecting pipe; 22. Nozzle; 23. Sliding bracket. 24. Hydrogen sensor; 25. Fixing bolt; 26. Second connecting pipe; 27. Fixing limit frame; 28. First solenoid valve; 29. ​​Delivery pipe; 30. Limiting slot; 31. Storage tank; 32. Pressure sensor; 33. Second moving toothed plate; 34. Fixing plate; 35. Temperature sensor; 36. PTC ceramic heating element; 37. Storage tank; 38. Sealing cover; 39. Second dual-head motor; 40. Second fixing limit plate; 41. Sliding plate; 42. Second drive gear; 43. Third connecting pipe; 44. Second solenoid valve. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0020] like Figure 1-5 As shown, the present invention discloses a hydrogen preservation box and a hydrogen generation method, comprising a detachable protective frame 1, a sealing door 2, a hydrogen production body 3, and a storage and preservation body 4. The hydrogen production body 3 is fixedly connected to the bottom end of the storage and preservation body 4. The detachable protective frame 1 is fixedly installed on the hydrogen production body 3 and the storage and preservation body 4 by bolts, and the hydrogen production body 3 and the storage and preservation body 4 are located inside the detachable protective frame 1. The sealing door 2 is rotatably installed on the outer end of the detachable protective frame 1. The storage and preservation body 4 includes a detection and hydrogen filling section 7, a longitudinal slot 8, a preservation box 9, a sliding placement platform 10, and a limiting support plate 12. Three limiting support plates 12 are provided, and the three limiting support plates 12 are evenly fixedly arranged inside the preservation box 9. The bottom end of the sliding placement platform 10 is slidably engaged with the limiting support plate 12. The longitudinal slot 8 is evenly opened through both sides of the preservation box 9. Three detection and hydrogen filling sections 7 are provided, and the three detection and hydrogen filling sections 10 are evenly fixedly arranged inside the preservation box 9. The hydrogenation unit 7 is evenly distributed on the preservation box 9. The preservation box 9 has horizontal slots 6 evenly arranged on both sides, and the horizontal slots 6 are located below the vertical slots 8. The first electric push rods 5 are evenly fixedly installed on both sides of the preservation box 9. The side end of the sliding placement platform 10 is slidably engaged in the interior of the horizontal slots 6, and the front end of the first electric push rod 5 is fixedly connected to the side end of the sliding placement platform 10. The outer side end of the sliding placement platform 10 is fixedly installed with a baffle plate 11. The first electric push rod 5 can make the sliding placement platform 10 slide outward from the interior of the preservation box 9 along the horizontal slots 6, so that food, vegetables, fruits and other items that need to be preserved can be conveniently placed on the sliding placement platform 10. After placement, the first electric push rod 5 can make the sliding placement platform 10 slide back into the interior of the preservation box 9. The sliding placement platform 10 is evenly arranged inside the preservation box 9 so that food can be separated and fully preserved or stored.

[0021] like Figure 6As shown, the detection hydrogenation unit 7 includes a first fixed limiting plate 13, a first dual-head motor 14, a limiting plate 15, a first drive gear 16, a first moving gear plate 17, an L-shaped fixed connecting frame 18, a conveying limiting pipe 19, a first connecting pipe 20, a nozzle 22, and a sliding block 23. The conveying limiting pipe 19 is mirror-symmetrically distributed. The first connecting pipe 20 is fixedly connected to the outer end of the conveying limiting pipe 19, and the nozzle 22 communicates with the interior of the conveying limiting pipe 19. The L-shaped fixed connecting frame 18 is fixedly connected to the inner end of the conveying limiting pipe 19. The limiting plates 15 are symmetrically arranged. The inner end of the first moving gear plate 17 is slidably engaged with the interior of the limiting plate 15. The L-shaped fixed connecting frame 18 is fixedly connected to the side end of the first moving gear plate 17 away from the limiting plate 15. The first dual-head motor 14 is fixedly mounted on the first fixed limiting plate 13. The first drive gear 16 is rotatably engaged with the first fixed limiting plate 13, and the drive end of the first dual-head motor 14 is connected to the first fixed limiting plate 13. A drive gear 16 is fixedly connected in the middle, and the first drive gear 16 meshes with the first moving toothed plate 17. A sliding block 23 is symmetrically fixedly connected to the inside of the conveying limit tube 19. A nozzle 22 is opened on the sliding block 23. When the first dual-head motor 14 is started, it can drive the first drive gear 16 at both ends to rotate in opposite directions. At this time, the first drive gear 16 rotating in opposite directions can drive the first moving toothed plate 17 to move slowly up and down along the limit plate 15. Thus, with the help of the L-shaped fixed connecting frame 18, the conveying limit tube 19 and the hydrogen sensor 24 can slide on the preservation box 9. The hydrogen content of different areas of the preservation box 9 can be scanned and detected. When the hydrogen content of a certain area is low, the first solenoid valve 28 at the corresponding position opens and accurately delivers hydrogen to the designated area inside the preservation box 9 through the second connecting pipe 26 and the conveying hose. This can ensure that the hydrogen content inside the preservation box 9 is uniform and meets the requirements of long-term stable preservation.

[0022] Hydrogen sensors 24 are symmetrically fixedly installed on the conveying limit pipe 19, and the hydrogen sensors 24 are located on the sliding block 23. A circulating fan is uniformly fixedly installed inside the fresh food box 9, which can make the hydrogen distribution inside the fresh food box 9 uniform.

[0023] like Figure 7-9As shown, the hydrogen production body 3 includes a fixing bolt 25, a second connecting pipe 26, a fixing limit frame 27, a first solenoid valve 28, a delivery pipe 29, a limit slot 30, a storage tank 31, a second moving toothed plate 33, a fixing mounting plate 34, a PTC ceramic heating element 36, a storage tank 37, a sealing cover 38, a second double-headed motor 39, a second fixing limit plate 40, a sliding plate 41, a second drive gear 42, a third connecting pipe 43, and a second solenoid valve 44. The fixing bolt 25 is evenly threaded onto the fixing limit frame 27, and the limit slot... 30 is formed on both sides inside the fixed limiting frame 27. The fixed mounting plate 34 is fixedly connected to the bottom of both sides of the PTC ceramic heating element 36, and the fixed mounting plate 34 is fixedly installed on the bottom inside the fixed limiting frame 27 by bolts. The sliding plate 41 is fixedly connected to both sides of the storage tank 37. The sealing cover 38 is threaded in the middle of the outer end of the storage tank 37. The bottom end face of the storage tank 37 is in contact with the upper end face of the PTC ceramic heating element 36. The second moving toothed plate 33 is fixedly installed on the upper ends of both sides of the storage tank 37 by bolts. The storage tank 31 is set in the storage tank. Above the storage tank 37, the conveying pipes 29 are evenly and fixedly installed on both sides of the storage tank 31. The first solenoid valve 28 is fixedly installed on the upper part of the outer end of the conveying pipe 29. The second connecting pipe 26 is fixedly connected to the first solenoid valve 28. The second solenoid valve 44 is fixedly installed in the middle of the upper end of the storage tank 37 and the middle of the bottom end of the storage tank 31. The third connecting pipe 43 is fixedly installed in the middle of the second solenoid valve 44. The second fixed limiting plate 40 is fixedly installed inside the upper end of the fixed limiting frame 27. The second double-head motor 39 is fixedly installed on the second fixed limiting plate 40. The second drive gear 42 is rotatably engaged with the second fixed limiting plate 40, and the drive end of the second double-head motor 39 is fixedly connected to the middle of the second drive gear 42. Starting the second double-head motor 39 can drive the second drive gear 42 to rotate, thereby allowing the storage tank 37 and the sliding plate 41 to be discharged outward along the inside of the limiting groove 30 by means of the second moving tooth plate 33. Thus, by screwing on the sealing cap 38, the inside of the storage tank 37 can be cleaned and rare earth hydrogen storage materials (such as LaNi5, MmNi5, etc.) that have undergone hydrogen absorption reaction can be added.

[0024] The second drive gear 42 meshes with the second moving gear plate 33. The conveying pipe 29 is inserted through the fixed limiting frame 27 and distributed on the side of the fixed limiting frame 27. The storage tank 31 is fixedly installed inside the upper part of the fixed limiting frame 27. The sliding plate 41 is slidably engaged with the limiting slot 30. The fixed limiting frame 27 is fixedly connected to the bottom of the preservation box 9 by the fixed mounting bolts 25. The third connecting pipe 43 at the bottom of the storage tank 31 is connected to the third connecting pipe 43 at the upper part of the storage tank 37 by a hose. The evenly distributed second connecting pipes 26 are connected to the first connecting pipes 20 by hoses respectively. The hoses can be used to ensure stable conveying without affecting movement.

[0025] The sliding block 23 is slidably disposed inside the longitudinal slot 8. The limiting plate 15 and the first fixed limiting plate 13 are fixedly installed on the preservation box 9. The storage tank 37 contains rare earth hydrogen storage material, which can generate hydrogen gas when heated.

[0026] The working principle of Example 1 is as follows: During use, after the sealed door 2 is opened, the control panel on one side of the detachable protective frame 1 can be used to make the first electric push rod 5 at the corresponding position run. The first electric push rod 5 can make the sliding placement platform 10 slide out from the inside of the fresh food box 9 along the transverse slot 6, so that food, vegetables, fruits and other items that need to be kept fresh can be placed on the sliding placement platform 10. After the items are placed, the first electric push rod 5 can be used to make the sliding placement platform 10 slide back into the inside of the fresh food box 9. The sliding placement platforms 10 are evenly arranged inside the fresh food box 9 so that food can be separated and placed or stored in a way that ensures freshness. During the transport and storage process, the PTC ceramic heating element 36 is first activated to heat the bottom of the storage tank 37. The heating temperature is controlled at 50-80℃. At this time, the rare earth hydrogen storage material stored inside the storage tank 37 decomposes into metal and hydrogen under the heating conditions. The second solenoid valve 44 installed on the storage tank 31 and the storage tank 37 is opened, allowing the generated hydrogen to be transported into the storage tank 31. Then, it is transported through the transport pipe 29, the second connecting pipe 26, and the transport hose to the first connecting pipe 20 and the transport limiting pipe 19 in each detection hydrogenation unit 7. Finally, it is discharged from the nozzle 22. Hydrogen gas is supplied to the interior of the preservation box 9, thereby preserving the food stored inside. The evenly distributed hydrogen sensors 24 can detect the hydrogen content in different areas of the preservation box 9 in real time. When the hydrogen content inside the preservation box 9 meets the preservation requirements, the first solenoid valve 28 closes, and the PTC ceramic heating element 36 stops operating. The generated hydrogen can then be temporarily stored in the storage tank 31. During use, the evenly distributed hydrogen supply and detection units 7 can adjust the sliding placement platform 10 at corresponding positions. The hydrogen content in the surrounding area is automatically scanned and detected. Activating the first dual-head motor 14 drives the first drive gears 16 at both ends to rotate in opposite directions. This rotation of the first drive gears 16 causes the first moving gear plate 17 to slowly move up and down along the limiting plate 15. This, combined with the L-shaped fixed connecting frame 18, causes the conveying limiting tube 19 and the hydrogen sensor 24 to slide on the preservation box 9. This allows for scanning and detection of hydrogen content in different areas of the preservation box 9. When a low hydrogen content is detected in a certain area, the first solenoid valve 28 at the corresponding location opens, connecting the second connecting tube 26 and the conveying hose. Hydrogen is precisely delivered to the designated area inside the preservation box 9, ensuring a uniform hydrogen content inside the box and meeting the requirements for long-term stable preservation. It can also automatically and precisely replenish and add hydrogen. Activating the second dual-head motor 39 drives the second drive gear 42 to rotate, which, with the help of the second moving gear plate 33, allows the storage tank 37 and the sliding plate 41 to discharge outwards along the limiting groove 30. By screwing on the sealing cap 38, the interior of the storage tank 37 can be cleaned and rare earth hydrogen storage materials (such as LaNi5, MmNi5, etc.) that have undergone hydrogen absorption reactions can be added. Example

[0027] Based on Example 1, such as Figure 8 and Figure 9 As shown, pressure sensors 32 are evenly fixedly installed on both sides of the storage tank 31, and temperature sensors 35 are evenly fixedly installed on both sides of the upper end of the PTC ceramic heating element 36.

[0028] In implementing this embodiment, the temperature sensor 35 can uniformly regulate the temperature of the bottom of the storage tank 37 heated by the PTC ceramic heating element 36, and detect and control the temperature of the hydrogen generated in real time, so that the hydrogen can be generated stably and the temperature will not be too high and cause danger. The pressure sensor 32 can detect the pressure value inside the storage tank 31, which can help detect the amount of hydrogen stored inside the storage tank 31, and can replenish and buffer it in a timely manner.

[0029] A method for generating hydrogen includes the following steps: S1. Material Preparation The rare earth hydrogen storage alloy (LaNi5 series) in the storage tank (37) was pretreated for 3 cycles in a 0.5MPa hydrogen atmosphere to form a stable hydride; S2, Start the hydrogen production reaction The PTC ceramic heating element (36) is heated to 50-80℃, triggering the decomposition of hydrogen in the alloy; The pressure sensor (32) monitors the pressure inside the storage tank (37) in real time and controls the temperature to keep the pressure stable at 0.3-0.5 MPa; S3, Hydrogen Collection and Temporary Storage The second solenoid valve 44 between storage tank 37 and storage tank 31 is opened, and the generated hydrogen gas is transported to storage tank 31 for temporary storage through the third connecting pipe 43. The pressure sensor 32 monitors the hydrogen pressure in storage tank 31 in real time to ensure safe storage and timely replenishment. S4, Hydrogen is transferred to the preservation box. Based on the detection data of the hydrogen sensor 24 inside the preservation box 9, the corresponding first solenoid valve 28 is opened, and hydrogen is delivered to the first connecting pipe 20 of the detection hydrogenation unit 7 through the delivery pipe 29, the second connecting pipe 26 and the hose, and finally injected into the designated area of ​​the preservation box 9 through the nozzle 22.

[0030] This solution can be enhanced in several aspects: Example

[0031] A three-dimensional sensor network is constructed inside the preservation box (9). Redundant hydrogen sensors (24) are deployed at the top, middle and bottom, and an oxygen sensor is added to realize real-time dynamic monitoring of hydrogen and oxygen concentration in the space. The system executes a precise control strategy based on the monitoring data: when the hydrogen concentration is lower than the preservation set value (e.g., <3%), the hydrogen production body (3) is started to inject hydrogen through the bottom nozzle (22) to optimize the diffusion efficiency by utilizing the hydrogen floating characteristics. When the hydrogen concentration is close to the deflagration threshold (e.g., >3.5%) or the oxygen concentration is too high (e.g., >10%), the newly added top nitrogen valve is immediately opened to inject inert gas for dilution. At the same time, the upgraded bidirectional vortex fan in the box works with the guide hole on the side wall of the sliding placement platform (10) to form a forced circulation airflow to ensure that the hydrogen and oxygen distribution uniformity error is less than 2%. The pressure sensor (32) monitors the pressure of the storage tank (31) in real time. If the pressure exceeds the safety threshold (e.g., 1.5MPa), the pressure relief valve is triggered to exhaust gas to the external water seal device to form a closed-loop control. Example

[0032] To address the tendency of hydrogen to leak, multiple physical and material barriers are implemented: the sealing door (2) uses a double-layer magnetic fluid sealing ring instead of ordinary rubber, significantly improving the sealing level (leakage rate <0.01Pa·m³ / s); all pipeline interfaces (such as the second connecting pipe (26)) are upgraded to metal snap-ceramic composite sealing joints; the detachable protective outer frame (1) is lined with metal organic framework (MOFs) material to actively adsorb escaped hydrogen molecules; the walls of the food storage box (9) are made of aluminum alloy substrate and coated with SiO2 / TiO2 nanocomposite hydrogen barrier coating, reducing the material permeability to 1 / 50 of the traditional design; a distributed hydrogen detector is installed around the equipment. Once the ambient hydrogen concentration is detected to exceed the safety limit (such as 1%), the equipment can automatically cut off the power supply of the hydrogen production body (3), start the negative pressure exhaust system and trigger an audible and visual alarm within 3 seconds, forming active environmental protection. Example

[0033] Before operation, the necessity of opening the door must be assessed. For non-essential operations, visual inspection should be conducted through a borosilicate laser welding observation window with high light transmittance (92%) and high pressure resistance (0.5MPa). If opening the door is necessary, the operator must verify their identity through facial recognition. The door opening process must be strictly timed and an airflow barrier must be maintained to prevent a large influx of external air. After the door is closed, the system will automatically execute a vacuuming procedure to remove residual air. Then, a step-by-step hydrogen injection procedure will be executed: first, nitrogen gas will be injected for replacement, then low-concentration hydrogen gas will be gradually introduced, and finally adjusted to the target preservation concentration (e.g., 1.5-3.5%) to ensure the safe reconstruction of the internal environment after each operation. Example

[0034] Multiple safety safeguards are implemented inside the hydrogen production unit (3): redundant temperature sensors (35) are installed in the heating area of ​​the storage tank (37), and the power supply of the PTC ceramic heating element (36) is immediately cut off when the detected temperature exceeds the safety limit (e.g., 310℃); phosphate flame retardant microcapsules are added to the hydrogen production unit, which automatically release to inhibit the reaction when abnormal and violent decomposition occurs; a palladium (Pd) catalyst burner is added to the outlet end of the storage tank (31) to convert residual oxygen into harmless water vapor through catalytic reaction (2H2 + O2 → 2H2O), eliminating the combustion aid in the transported hydrogen; molecular sieve desiccant is filled in the transport pipe (29) to strictly control the humidity in the pipeline to be below 10% RH, greatly reducing the risk of electrostatic ignition and blocking safety hazards from the source of hydrogen production and the transport process.

[0035] This solution achieves a revolutionary safety improvement by systematically integrating the above technologies: the risk of explosion is completely eliminated—the hydrogen concentration inside the container is always stably controlled within a safe range (1.5-3.5%, far from the 4% lower explosive limit), and the oxygen concentration is maintained at ≤5% through nitrogen dilution; the risk of hydrogen leakage is significantly reduced, providing a reliable guarantee for the practical application of hydrogen preservation technology.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydrogen preservation box, comprising a detachable protective outer frame (1), a sealed door (2), a hydrogen production body (3), and a storage and preservation body (4), characterized in that: The hydrogen production body (3) is fixedly connected to the bottom end of the storage and preservation body (4). The detachable protective frame (1) is fixedly installed on the hydrogen production body (3) and the storage and preservation body (4) by bolts. The hydrogen production body (3) and the storage and preservation body (4) are located inside the detachable protective frame (1). The sealing door (2) is rotatably installed on the outer end of the detachable protective frame (1). The storage and preservation body (4) includes a hydrogen detection and addition section (7), a longitudinal slot (8), and a preservation box (9). The container includes a sliding placement platform (10) and a limiting support plate (12). Three limiting support plates (12) are provided and are evenly fixed inside the food preservation box (9). The bottom end of the sliding placement platform (10) is slidably engaged with the limiting support plate (12). The longitudinal slots (8) are evenly opened through both sides of the food preservation box (9). Three detection hydrogenation parts (7) are provided and are evenly distributed on the food preservation box (9).

2. The hydrogen preservation box according to claim 1, characterized in that: The preservation box (9) is provided with transverse slots (6) evenly on both sides, and the transverse slots (6) are located below the longitudinal slots (8). The preservation box (9) is fixedly installed with first electric push rods (5) evenly on both sides. The side end of the sliding placement platform (10) is slidably engaged inside the transverse slots (6), and the front end of the first electric push rod (5) is fixedly connected to the side end of the sliding placement platform (10). The outer side end of the sliding placement platform (10) is fixedly installed with a partition protrusion (11).

3. A hydrogen preservation box according to claim 2, characterized in that: The detection hydrogenation unit (7) includes a first fixed limiting plate (13), a first dual-head motor (14), a limiting plate (15), a first drive gear (16), a first moving toothed plate (17), an L-shaped fixed connecting frame (18), a delivery limiting tube (19), a first connecting tube (20), a nozzle (22), and a sliding block (23). The delivery limiting tube (19) is mirror-symmetrically distributed. The first connecting tube (20) is fixedly connected to the outer end of the delivery limiting tube (19), and the nozzle (22) communicates with the interior of the delivery limiting tube (19). The L-shaped fixed connecting frame (18) is fixedly connected to the inner end of the delivery limiting tube (19). The limiting plates (15) are symmetrically arranged. The inner end of the first moving toothed plate (17) is... The side end is slidably engaged inside the limiting plate (15). The L-shaped fixed connecting bracket (18) is fixedly connected to the side end of the first moving toothed plate (17) away from the limiting plate (15). The first double-headed motor (14) is fixedly installed on the first fixed limiting plate (13). The first drive gear (16) is rotatably engaged on the first fixed limiting plate (13). The drive end of the first double-headed motor (14) is fixedly connected to the middle of the first drive gear (16). The first drive gear (16) is meshed with the first moving toothed plate (17). The sliding block (23) is symmetrically fixedly connected to the inside of the conveying limiting tube (19). The nozzle (22) is opened on the sliding block (23).

4. A hydrogen preservation box according to claim 3, characterized in that: Hydrogen sensors (24) are symmetrically fixedly installed on the conveying limit tube (19), and the hydrogen sensors (24) are located on the sliding block (23). A circulating fan is uniformly fixedly installed inside the preservation box (9).

5. A hydrogen preservation box according to claim 4, characterized in that: The hydrogen production body (3) includes a fixing bolt (25), a second connecting pipe (26), a fixing limit frame (27), a first solenoid valve (28), a delivery pipe (29), a limit slot (30), a storage tank (31), a second moving toothed plate (33), a fixing plate (34), a PTC ceramic heating element (36), a storage tank (37), a sealing cover (38), a second dual-head motor (39), a second fixing limit plate (40), a sliding plate (41), a second drive gear (42), a third connecting pipe (43), and a second solenoid valve (44). Bolts (25) are evenly threaded into the fixed limiting frame (27). The limiting slots (30) are opened on both sides of the inside of the fixed limiting frame (27). The fixed mounting plate (34) is fixedly connected to the bottom of both sides of the PTC ceramic heating element (36), and the fixed mounting plate (34) is fixedly installed on the bottom inside of the fixed limiting frame (27) by bolts. The sliding plate (41) is fixedly connected to both sides of the storage tank (37). The sealing cap (38) is threaded in the middle of the outer end of the storage tank (37). The storage tank (37) The bottom end face of the second movable toothed plate (33) is attached to the upper end face of the PTC ceramic heating element (36). The second movable toothed plate (33) is fixedly installed on the upper ends of both sides of the storage tank (37) by bolts. The storage tank (31) is located directly above the storage tank (37). The conveying pipe (29) is evenly fixedly installed on both sides of the storage tank (31). The first solenoid valve (28) is fixedly installed on the upper part of the outer end of the conveying pipe (29). The second connecting pipe (26) is fixedly connected to the first solenoid valve (28). The second solenoid valve (44) is fixedly installed on the upper end of the storage tank (37). The upper middle part of the storage tank (37) and the lower middle part of the storage tank (31), and the third connecting pipe (43) is fixedly installed in the middle of the second solenoid valve (44), the second fixed limiting plate (40) is fixedly installed in the upper part of the fixed limiting frame (27), the second double-head motor (39) is fixedly installed on the second fixed limiting plate (40), the second drive gear (42) is rotated and engaged on the second fixed limiting plate (40), and the drive end of the second double-head motor (39) is fixedly connected to the middle part of the second drive gear (42).

6. A hydrogen preservation box according to claim 5, characterized in that: The second drive gear (42) meshes with the second moving toothed plate (33), the conveying pipe (29) is inserted through the fixed limiting frame (27) and distributed on the side end of the fixed limiting frame (27), the storage tank (31) is fixedly installed inside the upper end of the fixed limiting frame (27), and the sliding plate (41) is slidably engaged with the limiting slot (30).

7. A hydrogen preservation box according to claim 6, characterized in that: The fixed limiting frame (27) is fixedly connected to the bottom of the food storage box (9) by the fixed mounting bolt (25). The third connecting pipe (43) at the bottom of the storage tank (31) is connected to the third connecting pipe (43) at the top of the storage tank (37) by a hose. The evenly distributed second connecting pipes (26) are connected to the first connecting pipe (20) by hoses respectively.

8. A hydrogen preservation box according to claim 7, characterized in that: The sliding block (23) is slidably disposed inside the longitudinal slot (8), the limiting plate (15) and the first fixed limiting plate (13) are fixedly installed on the preservation box (9), and the storage tank (37) contains rare earth hydrogen storage material.

9. A hydrogen preservation box according to claim 8, characterized in that: Pressure sensors (32) are uniformly fixedly installed on both sides of the storage tank (31), and temperature sensors (35) are uniformly fixedly installed on both sides of the upper end of the PTC ceramic heating element (36).

10. A method for generating hydrogen, applicable to the hydrogen preservation box described in claim 9, characterized in that, Includes the following steps: S1. Material Preparation The rare earth hydrogen storage alloy (LaNi5 series) in the storage tank (37) was pretreated for 3 cycles in a 0.5MPa hydrogen atmosphere to form a stable hydride; S2, Start the hydrogen production reaction The PTC ceramic heating element (36) is heated to 50-80℃, triggering the decomposition of hydrogen in the alloy; The pressure sensor (32) monitors the pressure inside the storage tank (37) in real time and controls the temperature to keep the pressure stable at 0.3-0.5 MPa; The output flow rate is precisely adjusted using a mass flow controller; S3, Hydrogen Collection and Temporary Storage Open the second solenoid valve (44) between the storage tank (37) and the storage tank (31), and the generated hydrogen gas is transported to the storage tank (31) for temporary storage through the third connecting pipe (43). The pressure sensor (32) monitors the hydrogen pressure in the storage tank (31) in real time to ensure safe storage and timely replenishment. S4, Hydrogen is transferred to the preservation box. Based on the detection data of the hydrogen sensor (24) inside the preservation box (9), the corresponding first solenoid valve (28) is opened, and hydrogen is delivered to the first connecting pipe (20) of the detection hydrogenation unit (7) via the delivery pipe (29), the second connecting pipe (26) and the hose, and finally injected into the designated area of ​​the preservation box (9) through the nozzle (22).

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