Building scene-oriented miniaturized mobile photovoltaic off-grid hydrogen production device and method

Abstract

The invention discloses a building scene-oriented miniaturized mobile photovoltaic off-grid hydrogen production device and method, and relates to the technical field of clean energy development in the building industry, and the building scene-oriented miniaturized mobile photovoltaic off-grid hydrogen production device comprises a shell, a voltage conversion module, a water electrolysis module, a water circulation module, a hydrogen separation module and a hydrogen purification module. According to the invention, a solar off-grid indirect coupling hydrogen production technology is integrated into the portable all-in-one machine, a miniaturized mobile hydrogen production terminal capable of producing hydrogen with distributed photovoltaics on the surface of a building is manufactured, new energy power consumption is realized, and meanwhile, the terminal can be used as a mobile power supply or an emergency power supply to provide stable green power for different types of building scenes. According to the invention, the solar energy light-electricity conversion characteristic is utilized, and the converted electric energy is used for electrolyzing water to prepare hydrogen, so that comprehensive development and utilization of a multi-energy integrated clean energy system for converting solar energy into electric energy, converting electric energy into hydrogen energy and the like are realized. The device is compact in structure, good in energy efficiency, high in operability and easy to carry and use.

Description

Technical Field

[0001] The present invention relates to the technical field of clean energy development in the construction industry, and in particular to a miniaturized mobile photovoltaic off-grid hydrogen production device and method for construction scenarios. Background Art

[0002] Buildings are one of the important areas of global energy consumption and carbon emissions. Buildings have a large number of idle surfaces (such as roofs and exterior walls), which are suitable for installing clean, renewable, and low-maintenance energy systems such as photovoltaics. They use solar energy to convert into electrical energy through the photovoltaic effect. They have the advantages of modularity and strong flexibility, but they also face problems such as serious abandonment of light, intermittent power generation, unstable quality, and high energy storage costs. Photovoltaic power generation is affected by weather and sunshine, and is intermittent and unstable. It cannot generate electricity at night and is heavily dependent on pumped storage and lithium-ion battery energy storage technology. The large-scale application of lithium battery energy storage in the construction field is not only costly, inefficient, and limited in life, but the battery waste disposal and recycling technology is still imperfect, and it may also have an impact on the environment.

[0003] As a secondary energy source, hydrogen energy has abundant sources, high energy density, and is clean and pollution-free. It has outstanding advantages in energy, time, and space dimensions. It can not only reduce dependence on fossil energy, but also reduce carbon emissions during construction in the engineering field, and help the sustainable development of the construction industry. As my country's photovoltaic power generation installed capacity continues to break through, its consumption demand has also increased significantly. Photohydrogen storage, as a way of using photovoltaic power generation, combines water electrolysis to produce hydrogen and hydrogen energy, can be well adapted to centralized and distributed photovoltaics. However, existing photovoltaic power generation, hydrogen production equipment, and hydrogen storage equipment are usually designed as large-scale modules, which take up a lot of space and are not suitable for the limited space and energy consumption requirements in the construction field.

[0004] In summary, a distributed energy system that can be adapted to buildings can be used as a mobile power source or emergency power source to provide stable green electricity for different types of building scenarios. At the same time, the solar-driven miniaturized mobile photovoltaic off-grid hydrogen production device with the characteristics of miniaturization and modularization undoubtedly has important scientific research and practical significance. Summary of the invention

[0005] The present invention aims to address the deficiencies of the prior art and to provide a miniaturized mobile photovoltaic off-grid hydrogen production device and method for building scenarios. The device and method expand the application scope and usage of hydrogen energy, while improving the stability and utilization rate of photovoltaic electricity, making the energy supply more low-carbon, environmentally friendly, stable and reliable.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a miniaturized mobile photovoltaic off-grid hydrogen production device for building scenes, comprising:

[0007] The housing comprises a front cover, an upper cover, a U-shaped bottom plate and a rear cover, wherein a first heat dissipation vent is provided on one side of the front cover, and a controller with a display screen and a controller bracket are provided on the other side, and the controller is fixed to the front cover through the controller bracket; a second heat dissipation vent, a water inlet and a drain hole are respectively provided on one side plate of the U-shaped bottom plate, and a hydrogen outlet hole and a hydrogen pressure relief hole are respectively provided on the other side plate; a photovoltaic panel interface module is provided on the rear cover;

[0008] A voltage conversion module includes a step-down or step-up DC / DC converter and a converter fixing bracket, wherein the DC / DC converter is mounted on the rear cover plate through the converter fixing bracket;

[0009] A water electrolysis module, comprising a PEM electrolyzer, a water flow meter, a first hydrogen outlet, a water supply pipeline, a water return pipeline and an electrolyzer fixing bracket, wherein the PEM electrolyzer is mounted on a rear cover plate via the electrolyzer fixing bracket;

[0010] A water circulation module, including a water tank, a water circulation pump, an exhaust hole, a water circulation pipeline, a water inlet pipeline, a drainage pipeline, and a water tank fixing bracket. The water tank is mounted on the rear cover plate through the water tank fixing bracket. The water circulation pump is connected to the top of the water tank and is connected to the PEM electrolyzer through a water supply pipeline and a return pipeline. A water flow meter is installed on the water supply pipeline. The exhaust hole is set on the top of the water circulation pump. The water inlet pipeline and the drainage pipeline are connected to one side of the water tank and are respectively connected to an external water source through the water inlet hole and the drainage hole.

[0011] A hydrogen separation module, comprising a hydrogen-water separator, a second hydrogen outlet path, and a hydrogen-water separator fixing bracket, wherein the hydrogen-water separator is mounted on a rear cover plate through the hydrogen-water separator fixing bracket, the first hydrogen outlet path is connected between the PEM electrolyzer and the top of the hydrogen-water separator, and the water circulation pipeline is connected between the hydrogen-water separator and the bottom of the water tank;

[0012] A hydrogen purification module, comprising a drying device, a third hydrogen outlet, a mass flow controller, a purification device, a fourth hydrogen outlet, a pressure gauge, a pressure relief valve, a hydrogen valve, and a hydrogen purification module fixing bracket, wherein the drying device and the purification device are mounted on a rear cover plate through the hydrogen purification module fixing bracket, the second hydrogen outlet is connected between the hydrogen-water separator and the top of the drying device, the third hydrogen outlet is connected between the drying device and the bottom of the purification device, the mass flow controller is mounted on the third hydrogen outlet, the fourth hydrogen outlet is connected to the top of the purification device, one end of the fourth hydrogen outlet passes through the hydrogen outlet hole and is equipped with a hydrogen valve, and the other end is connected with a pressure gauge, the fourth hydrogen outlet is connected with a hydrogen pressure relief pipeline, and the hydrogen pressure relief pipeline passes through the hydrogen pressure relief hole and is equipped with a pressure relief valve;

[0013] The DC / DC converter and the controller, the photovoltaic panel interface module, and the PEM electrolyzer are connected through circuits; the controller and the electrolyzer, the water flow meter, the water circulation pump, the hydrogen-water separator, the drying device, the mass flow controller, the purification device, and the pressure gauge are connected.

[0014] In particular, the photovoltaic panel interface module is provided with several different types of interfaces for adapting to the power interface forms of different photovoltaic panels.

[0015] Particularly, the controller bracket is a pair of right-angle plates installed on the inner side of the front cover plate, and the controller is fixed on the opposite surfaces of the two right-angle plates.

[0016] In particular, the converter fixing bracket includes a first pad installed on the front side of the rear cover plate, first support rods are vertically arranged at four corners of the front side of the first pad, a first fixing plate is arranged at the end of the first support rod, and the DC / DC converter is fixed on the first fixing plate.

[0017] Particularly, the electrolytic cell fixing bracket comprises a second pad installed on the front side of the rear cover plate, second support rods are vertically arranged at the four corners of the front side of the second pad, a second fixing plate is arranged at the end of the second support rod, and the PEM electrolytic cell is fixed on the second fixing plate.

[0018] Particularly, the water tank fixing bracket comprises a third pad installed on the front side of the rear cover plate, a U-shaped third fixing plate is vertically arranged on the front side of the third pad, and the water tank is fixed in the third fixing plate.

[0019] In particular, the hydrogen-water separator fixing bracket includes a fourth pad installed on the front side of the rear cover plate, a third support rod is vertically provided at the top and bottom of the front side of the fourth pad, a semicircular first fixing ring plate is provided at the end of the third support rod, and the hydrogen-water separator is fixed in the first fixing ring plate.

[0020] In particular, the hydrogen purification module fixing bracket includes a fifth pad installed on the front side of the rear cover plate, a pair of fourth support rods are vertically provided at both ends of the front side of the fifth pad, a semicircular second fixing ring plate is provided at the end of the fourth support rod, and the drying device and the purification device are respectively installed in the corresponding second fixing ring plates.

[0021] A miniaturized mobile photovoltaic off-grid hydrogen production method for building scenarios, using a miniaturized mobile photovoltaic off-grid hydrogen production device for building scenarios, includes the following steps:

[0022] S1. Under sunlight irradiation conditions, the photovoltaic panel is connected to the hydrogen production device through the photovoltaic panel interface module;

[0023] S2. Turn on the controller and confirm that the working environment meets the relevant safety requirements and the equipment operating conditions;

[0024] S3. Confirm that the pressure relief valve is in the closed state, open the hydrogen valve and connect the hydrogen storage bottle;

[0025] S4. Inject pure water required for the working water level into the water tank through the water inlet pipe, turn on the water circulation pump to allow the pure water to enter the PEM electrolyzer, and after no bubbles emerge from the return water pipe, operate the controller to turn on the power supply of the PEM electrolyzer;

[0026] S5. After the PEM electrolyzer is powered on, the controller is operated to gradually increase the current load until the rated current is reached. The oxygen generated at the anode during the electrolysis of water enters the water tank through the return pipe, and then is discharged into the air through the exhaust hole, the first heat dissipation exhaust hole, and the second heat dissipation exhaust hole. The hydrogen generated at the cathode during the electrolysis of water passes through the hydrogen-water separator, the drying device, and the purification device in sequence and enters the hydrogen bottle for storage;

[0027] S6. After the hydrogen production device is finished working, the PEM electrolyzer power supply, hydrogen storage bottle and hydrogen valve are turned off through the controller, and the water in the water tank is discharged through the drainage pipeline;

[0028] S7. Turn off the controller and unplug the photovoltaic panel connection wires.

[0029] The beneficial effects of the present invention are:

[0030] 1. The present invention integrates the solar off-grid indirect coupling hydrogen production technology into a portable all-in-one machine, forming a miniaturized mobile hydrogen production terminal that can produce hydrogen with distributed photovoltaics on the surface of a building under lighting conditions.

[0031] 2. The present invention connects photovoltaic and electrolyzer through power electronic equipment, optimizes system efficiency, dynamically adjusts power input under different lighting conditions, ensures the optimal power of the electrolyzer during hydrogen production, and effectively improves the efficiency and economy of hydrogen production.

[0032] 3. The present invention realizes photovoltaic power consumption, solves the problem of abandoned light through the light hydrogen storage solution, and can be used as a mobile power source or backup power source to provide stable green electricity for different building scenarios.

[0033] 4. The present invention combines photovoltaic panels and hydrogen fuel cell systems to meet the power supply needs of temporary buildings or emergency housing in natural disasters and extreme environments without city power or in off-grid conditions. It has low cost and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the location of the photovoltaic panel interface module of the present invention;

[0036] Figure 3 It is a schematic diagram of the explosion structure of the shell of the present invention;

[0037] Figure 4 It is a schematic diagram of the structure of the converter fixing bracket, the electrolyzer fixing bracket, the electrolyzer fixing bracket, the water tank fixing bracket, the hydrogen-water separator fixing bracket, and the hydrogen purification module fixing bracket of the present invention;

[0038] Figure 5 It is a schematic diagram of the internal structure of the present invention;

[0039] In the figure:

[0040] 1-housing; 11-front cover; 111-first heat dissipation vent; 112-controller; 113-controller bracket; 12-upper cover; 13-U-shaped bottom plate; 131-second heat dissipation vent; 132-water inlet; 133-drainage hole; 14-rear cover; 141-photovoltaic panel interface module;

[0041] 2-voltage conversion module; 21-DC / DC converter; 22-converter fixing bracket; 221-first pad; 222-first support rod; 223-first fixing plate;

[0042] 3-water electrolysis module; 31-PEM electrolyzer; 32-water flow meter; 33-first hydrogen outlet; 34-water supply pipeline; 35-water return pipeline; 36-electrolyzer fixing bracket; 361-second pad; 362-second support rod; 363-second fixing plate;

[0043] 4-water circulation module; 41-water tank; 42-water circulation pump; 43-exhaust hole; 44-water circulation pipeline; 45-water inlet pipeline; 46-drainage pipeline; 47-water tank fixing bracket; 471-third pad; 472-third fixing plate;

[0044] 5-hydrogen separation module; 51-hydrogen-water separator; 52-second hydrogen outlet; 53-hydrogen-water separator fixing bracket; 531-fourth pad; 532-third support rod; 533-first fixing ring plate;

[0045] 6-hydrogen purification module; 61-drying device; 62-third hydrogen outlet; 63-mass flow controller; 64-purification device; 65-fourth hydrogen outlet; 651-hydrogen pressure relief pipeline; 66-pressure gauge; 67-pressure relief valve; 68-hydrogen valve; 69-hydrogen purification module fixing bracket; 691-fifth pad; 692-fourth support rod; 693-second fixed ring plate;

[0046] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0048] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0049] like Figure 1-Figure 5 As shown, the miniaturized mobile photovoltaic off-grid hydrogen production device for building scenarios includes:

[0050] The shell 1 includes a front cover plate 11, an upper cover plate 12, a U-shaped bottom plate 13 and a rear cover plate 14. A first heat dissipation exhaust hole 111 is provided on one side of the front cover plate 11, and a controller 112 with a display screen and a controller bracket 113 are provided on the other side. The controller 112 is fixed to the front cover plate 11 through the controller bracket 113. The controller bracket 113 is a pair of right-angle plates installed on the inner side of the front cover plate 11, and the controller 112 is fixed on the opposite surfaces of the two right-angle plates; a second heat dissipation exhaust hole 131, a water inlet hole 132, and a drain hole 133 are respectively provided on one side plate of the U-shaped bottom plate 13, and a hydrogen outlet hole 134 and a hydrogen pressure relief hole 135 are respectively provided on the other side plate; a photovoltaic panel interface module 141 is provided on the rear cover plate 14, which is used to connect the solar photovoltaic panel and then transmit electrical energy to the hydrogen production device; a plurality of different types of interfaces are provided on the photovoltaic panel interface module 141, which are used to adapt to the power interface forms of different photovoltaic panels.

[0051] Specifically, the photovoltaic panel interface module 141 can be provided with three different interface types, which can be connected to the photovoltaic panel circuit installed on the surface of the building (such as the roof, exterior wall, etc.), and the electric energy generated by the photovoltaic panel under the sunlight can be used as the power source of the hydrogen production device to drive the operation of the controller 112 and the hydrogen production process, thereby realizing the efficient utilization of green energy and the production of clean hydrogen.

[0052] The voltage conversion module 2 includes a step-down or step-up DC / DC converter 21 and a converter fixing bracket 22. The DC / DC converter 21 is installed on the rear cover 14 through the converter fixing bracket 22; the converter fixing bracket 22 includes a first pad 221 installed on the front side of the rear cover 14, and the front side of the first pad 221 is provided with four corners at which first support rods 222 are vertically provided. The end of the first support rod 222 is provided with a first fixing plate 223, and the DC / DC converter 21 is fixed on the first fixing plate 223.

[0053] The water electrolysis module 3 includes a PEM electrolyzer 31, a water flow meter 32, a first hydrogen outlet 33, a water supply pipeline 34, a return water pipeline 35 and an electrolyzer fixing bracket 36. The PEM electrolyzer 31 is installed on the rear cover plate 14 through the electrolyzer fixing bracket 36; the electrolyzer fixing bracket 36 includes a second pad 361 installed on the front side of the rear cover plate 14, and second support rods 362 are vertically provided at the four corners of the front side of the second pad 361. A second fixing plate 363 is provided at the end of the second support rod 362, and the PEM electrolyzer 31 is fixed on the second fixing plate 363.

[0054] Specifically, a step-down or step-up DC / DC converter 21 is used to connect the photovoltaic panel interface module 141 and the PEM electrolyzer 31, dynamically adjust the power input under different lighting conditions, optimize the system efficiency, and achieve effective transmission and regulation of power. The DC / DC converter 21 steps up or steps down the direct current output by the photovoltaic panel according to actual needs, and uses pulse width modulation (PWM) technology to adjust the duty cycle to ensure that the power can provide the optimal power for the PEM electrolyzer 31.

[0055] The water circulation module 4 includes a water tank 41, a water circulation pump 42, an exhaust hole 43, a water circulation pipeline 44, a water inlet pipeline 45, a drain pipeline 46, and a water tank fixing bracket 47. The water tank 41 is installed on the rear cover 14 through the water tank fixing bracket 47. The water tank fixing bracket 47 includes a third pad 471 installed on the front side of the rear cover 14. A U-shaped third fixing plate 472 is vertically provided on the front side of the third pad 471. The water tank 41 is fixed in the third fixing plate 472; the water circulation pump 42 is connected to the top of the water tank 41 and is connected to the PEM electrolyzer 31 through the water supply pipeline 34 and the return water pipeline 35. The water flow meter 32 is installed on the water supply pipeline 34. The exhaust hole 43 is set on the top of the water circulation pump 42. The water inlet pipeline 45 and the drain pipeline 46 are connected to one side of the water tank 41 and are connected to the external water source through the water inlet hole 132 and the drain hole 133 respectively.

[0056] Specifically, the anode side of the PEM electrolyzer 31 is connected to a water tank 41 and a water circulation pump 42. The circulating water follows the principle of bottom-in and top-out, passing through the water tank 41, the water circulation pump 42, the water supply pipeline 34, the PEM electrolyzer 31, and the return pipeline 35, and finally returns to the water tank 41 to complete a whole water circuit cycle.

[0057] When the PEM electrolyzer 31 is working, the hydrogen generated by electrolyzing water at the cathode enters the hydrogen-water separator 51 through the first hydrogen outlet 33, and the water vapor therein returns to the water tank 41 through the water circulation path 53, and is supplied to the PEM electrolyzer 31 again by the water circulation pump 42. When the PEM electrolyzer 31 is working, the oxygen generated by electrolyzing water at the anode enters the water tank 41 through the return water pipeline 35, and is then discharged into the air through the exhaust hole 43, the first heat dissipation exhaust hole 111 and the second heat dissipation exhaust hole 131.

[0058] The hydrogen separation module 5 includes a hydrogen-water separator 51, a second hydrogen outlet path 52, and a hydrogen-water separator fixing bracket 53. The hydrogen-water separator 51 is installed on the rear cover plate 14 through the hydrogen-water separator fixing bracket 53. The hydrogen-water separator fixing bracket 53 includes a fourth pad 531 installed on the front side of the rear cover plate 14. The third support rod 532 is vertically provided at the top and bottom of the front side of the fourth pad 531. A semicircular first fixing ring plate 533 is provided at the end of the third support rod 532. The hydrogen-water separator 51 is fixed in the first fixing ring plate 533. The first hydrogen outlet path 33 is connected between the PEM electrolyzer 31 and the top of the hydrogen-water separator 51. The water circulation pipeline 44 is connected between the hydrogen-water separator 51 and the bottom of the water tank 41.

[0059] Specifically, before starting hydrogen production, pure water required for the working water level is injected into the water tank 41 through the water inlet hole 132 on the U-shaped bottom plate 13, and after hydrogen production is completed, the water in the water tank 41 is discharged through the drain hole 133 on the U-shaped bottom plate 13. The water in the water tank 41 enters the PEM electrolyzer 31 through the water supply pipeline 34, the hydrogen generated after the reaction enters the hydrogen-water separator 51 through the first hydrogen outlet 33, the generated oxygen and unreacted water return to the water tank 41 through the return water pipeline 35, and the hydrogen separated from the water enters the hydrogen drying device 61 through the second hydrogen outlet 52.

[0060] The hydrogen purification module 6 includes a drying device 61, a third hydrogen outlet 62, a mass flow controller 63, a purification device 64, a fourth hydrogen outlet 65, a pressure gauge 66, a pressure relief valve 67, a hydrogen valve 68, and a hydrogen purification module fixing bracket 69. The drying device 61 and the purification device 64 are installed on the rear cover plate 14 through the hydrogen purification module fixing bracket 69. The hydrogen purification module fixing bracket 69 includes a fifth pad 691 installed on the front side of the rear cover plate 14. A pair of fourth support rods 692 are vertically arranged at both ends of the front side of the fifth pad 691. A semicircular second fixing ring plate 693 is arranged at the end of the fourth support rod 692. The drying device 61 and the purification device 64 are respectively installed in the corresponding second fixed ring plate 693, the second hydrogen derivation path 52 is connected between the hydrogen-water separator 51 and the top of the drying device 61, the third hydrogen derivation path 62 is connected between the drying device 61 and the bottom of the purification device 64, the mass flow controller 63 is installed on the third hydrogen derivation path 62, the fourth hydrogen derivation path 65 is connected to the top of the purification device 64, one end of the fourth hydrogen derivation path 65 passes through the hydrogen derivation hole 134 and is equipped with a hydrogen valve 68, and the other end is connected to a pressure gauge 66, the fourth hydrogen derivation path 65 is connected to a hydrogen pressure relief pipeline 651, and the hydrogen pressure relief pipeline 651 passes through the hydrogen pressure relief hole 135 and is equipped with a pressure relief valve 67.

[0061] Specifically, after being dried by the drying device 61, the hydrogen enters the purification device 64 through the third hydrogen outlet 62 equipped with the mass flow controller 63, and the hydrogen flow is controlled by the controller 112. After being purified by the purification device 64, the pressure of the hydrogen is measured by the pressure gauge 66, and the current pressure is displayed by the controller 112. When the pressure exceeds the limit, the pressure relief valve 67 can be used to release the pressure. The hydrogen valve 68 is opened to connect the hydrogen storage bottle to realize the storage of gaseous hydrogen, and it can be used as a mobile power source or backup power source to provide stable green electricity for different building scenes.

[0062] The DC / DC converter 21 and the controller 112, the photovoltaic panel interface module 141, and the PEM electrolyzer 31 are connected via a circuit; the controller 112 and the electrolyzer 31, the water flow meter 32, the water circulation pump 42, the hydrogen-water separator 51, the drying device 61, the mass flow controller 63, the purification device 64, and the pressure gauge 66 are connected.

[0063] Specifically, the controller 112 has built-in sensors and mounting devices, which display the measurement results in real time and automatically stop the hydrogen production process when a specific pressure, voltage, temperature or gas concentration is detected.

[0064] All pipeline connections are firm and reliable, with suitable resistance to temperature, pressure and water. Materials in contact with water are corrosion-resistant, oxidation-resistant and high-temperature-resistant.

[0065] A miniaturized mobile photovoltaic off-grid hydrogen production method for building scenarios, using a miniaturized mobile photovoltaic off-grid hydrogen production device for building scenarios, includes the following steps:

[0066] S1. Under sunlight irradiation conditions, the photovoltaic panel is connected to the hydrogen production device through the photovoltaic panel interface module 141;

[0067] S2. Turn on the controller 112 and confirm that the working environment meets the relevant safety requirements and the equipment operation conditions;

[0068] S3, confirm that the pressure relief valve 67 is in a closed state, open the hydrogen valve 68 to connect the hydrogen storage bottle;

[0069] S4, inject pure water required for the working water level into the water tank 41 through the water inlet pipe 45, turn on the water circulation pump 42, let the pure water enter the PEM electrolyzer 31, and after no bubbles emerge from the return water pipe 35, operate the controller 112 to turn on the power supply of the PEM electrolyzer 31;

[0070] S5. After the PEM electrolyzer 31 is powered on, the controller 112 is operated to gradually increase the current load until the rated current is reached. The oxygen generated at the anode during the electrolysis of water enters the water tank 41 through the return pipe 35, and then is discharged into the air through the exhaust hole 43, the first heat dissipation exhaust hole 111 and the second heat dissipation exhaust hole 131. The hydrogen generated at the cathode during the electrolysis of water passes through the hydrogen-water separator 51, the drying device 61 and the purification device 64 in sequence and enters the hydrogen bottle for storage;

[0071] S6, the hydrogen production device is finished, the power supply of the PEM electrolyzer 31, the hydrogen storage bottle and the hydrogen valve 68 are turned off through the controller 112, and the water in the water tank 41 is discharged through the drainage pipeline 46;

[0072] S7, turn off the controller 112, and unplug the photovoltaic panel connection line.

[0073] The present invention integrates the off-grid indirect coupling hydrogen production technology of solar energy into a portable all-in-one machine, creating a miniaturized mobile hydrogen production terminal that can produce hydrogen with distributed photovoltaics on the surface of buildings, realizing the consumption of new energy electricity and being able to be used as a mobile power source or emergency power source to provide stable green electricity for different types of building scenes, improving the stability and utilization rate of photovoltaic electricity, and making the energy supply more low-carbon, environmentally friendly, stable and reliable. The present invention utilizes the photoelectric conversion characteristics of solar energy, and uses the converted electric energy for the electrolysis of water to produce hydrogen, thereby realizing the comprehensive development and utilization of a clean energy system that integrates multiple energies such as the conversion of solar energy into electric energy and the conversion of electric energy into hydrogen energy. The present invention has a compact structure, good energy efficiency, strong operability, and is easy to carry and use.

[0074] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] The above is an exemplary description of the present invention. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A miniaturized mobile photovoltaic off-grid hydrogen production device for building scenes, characterized in that: include: A housing (1) comprises a front cover (11), an upper cover (12), a U-shaped bottom plate (13) and a rear cover (14); a first heat dissipation exhaust hole (111) is provided on one side of the front cover (11), and a controller (112) with a display screen and a controller bracket (113) are provided on the other side; the controller (112) is fixed to the front cover (11) via the controller bracket (113); a second heat dissipation exhaust hole (131), a water inlet hole (132) and a water discharge hole (133) are respectively provided on one side plate of the U-shaped bottom plate (13), and a hydrogen outlet hole (134) and a hydrogen pressure relief hole (135) are respectively provided on the other side plate; and a photovoltaic panel interface module (141) is provided on the rear cover (14); A voltage conversion module (2) comprises a step-down or step-up DC / DC converter (21) and a converter fixing bracket (22), wherein the DC / DC converter (21) is mounted on the rear cover plate (14) via the converter fixing bracket (22); A water electrolysis module (3) comprises a PEM electrolyzer (31), a water flow meter (32), a first hydrogen outlet (33), a water supply pipeline (34), a water return pipeline (35) and an electrolyzer fixing bracket (36), wherein the PEM electrolyzer (31) is mounted on the rear cover plate (14) via the electrolyzer fixing bracket (36); A water circulation module (4), comprising a water tank (41), a water circulation pump (42), an exhaust hole (43), a water circulation pipeline (44), a water inlet pipeline (45), a drainage pipeline (46), and a water tank fixing bracket (47), wherein the water tank (41) is mounted on the rear cover plate (14) via the water tank fixing bracket (47), the water circulation pump (42) is connected to the top of the water tank (41) and is connected to the PEM electrolyzer (31) via a water supply pipeline (34) and a water return pipeline (35), the water flow meter (32) is mounted on the water supply pipeline (34), the exhaust hole (43) is arranged on the top of the water circulation pump (42), the water inlet pipeline (45) and the drainage pipeline (46) are connected to one side of the water tank (41) and are connected to an external water source via the water inlet hole (132) and the drainage hole (133) respectively; A hydrogen separation module (5) comprises a hydrogen-water separator (51), a second hydrogen outlet path (52), and a hydrogen-water separator fixing bracket (53); the hydrogen-water separator (51) is mounted on a rear cover plate (14) via the hydrogen-water separator fixing bracket (53); the first hydrogen outlet path (33) is connected between the PEM electrolyzer (31) and the top of the hydrogen-water separator (51); and the water circulation pipeline (44) is connected between the hydrogen-water separator (51) and the bottom of a water tank (41); A hydrogen purification module (6) comprises a drying device (61), a third hydrogen outlet (62), a mass flow controller (63), a purification device (64), a fourth hydrogen outlet (65), a pressure gauge (66), a pressure relief valve (67), a hydrogen valve (68), and a hydrogen purification module fixing bracket (69). The drying device (61) and the purification device (64) are mounted on the rear cover plate (14) via the hydrogen purification module fixing bracket (69). The second hydrogen outlet (52) is connected between the hydrogen-water separator (51) and the top of the drying device (61). The third hydrogen outlet (52) is connected between the hydrogen-water separator (51) and the top of the drying device (61). (62) is connected between the drying device (61) and the bottom of the purification device (64), the mass flow controller (63) is installed on the third hydrogen outlet path (62), the fourth hydrogen outlet path (65) is connected to the top of the purification device (64), one end of the fourth hydrogen outlet path (65) passes through the hydrogen outlet hole (134) and is installed with a hydrogen valve (68), and the other end is connected to a pressure gauge (66), the fourth hydrogen outlet path (65) is connected to a hydrogen pressure relief pipeline (651), and the hydrogen pressure relief pipeline (651) passes through the hydrogen pressure relief hole (135) and is installed with a pressure relief valve (67); The DC / DC converter (21) is connected to the controller (112), the photovoltaic panel interface module (141), and the PEM electrolyzer (31) via a circuit; the controller (112) is connected to the electrolyzer (31), the water flow meter (32), the water circulation pump (42), the hydrogen-water separator (51), the drying device (61), the mass flow controller (63), the purification device (64), and the pressure gauge (66).

2. The miniaturized mobile photovoltaic off-grid hydrogen production device for building scenes according to claim 1 is characterized in that: The photovoltaic panel interface module (141) is provided with a plurality of different types of interfaces for adapting to the power interface forms of different photovoltaic panels.

3. The miniaturized mobile photovoltaic off-grid hydrogen production device for building scenes according to claim 1 is characterized in that: The controller bracket (113) is a pair of right-angle plates installed on the inner side of the front cover plate (11), and the controller (112) is fixed on the opposite surfaces of the two right-angle plates.

4. The miniaturized mobile photovoltaic off-grid hydrogen production device for building scenes according to claim 1 is characterized in that: The converter fixing bracket (22) comprises a first pad (221) mounted on the front side of the rear cover plate (14); first support rods (222) are vertically arranged at four corners of the front side of the first pad (221); a first fixing plate (223) is arranged at the end of the first support rod (222); and the DC / DC converter (21) is fixed on the first fixing plate (223).

5. The miniaturized mobile photovoltaic off-grid hydrogen production device for building scenes according to claim 1 is characterized in that: The electrolytic cell fixing bracket (36) comprises a second pad (361) mounted on the front side of the rear cover plate (14), second support rods (362) are vertically arranged at the four corners of the front side of the second pad (361), and a second fixing plate (363) is arranged at the end of the second support rod (362), and the PEM electrolytic cell (31) is fixed on the second fixing plate (363).

6. The miniaturized mobile photovoltaic off-grid hydrogen production device for building scenes according to claim 1 is characterized in that: The water tank fixing bracket (47) comprises a third pad (471) mounted on the front side of the rear cover plate (14), a U-shaped third fixing plate (472) is vertically provided on the front side of the third pad (471), and the water tank (41) is fixed in the third fixing plate (472).

7. The miniaturized mobile photovoltaic off-grid hydrogen production device for building scenes according to claim 1 is characterized in that: The hydrogen-water separator fixing bracket (53) comprises a fourth pad (531) mounted on the front side of the rear cover plate (14); third support rods (532) are vertically provided at the top and bottom of the front side of the fourth pad (531); a semicircular first fixing ring plate (533) is provided at the end of the third support rod (532); and the hydrogen-water separator (51) is fixed within the first fixing ring plate (533).

8. The miniaturized mobile photovoltaic off-grid hydrogen production device for building scenes according to claim 1 is characterized in that: The hydrogen purification module fixing bracket (69) comprises a fifth pad (691) mounted on the front side of the rear cover plate (14); a pair of fourth support rods (692) are vertically provided at both ends of the front side of the fifth pad (691); a semicircular second fixing ring plate (693) is provided at the end of the fourth support rod (692); and the drying device (61) and the purification device (64) are respectively mounted in the corresponding second fixing ring plates (693).

9. A miniaturized mobile photovoltaic off-grid hydrogen production method for building scenes, using the miniaturized mobile photovoltaic off-grid hydrogen production device for building scenes as claimed in claim 1, characterized in that: The following steps are involved: S1. Under sunlight irradiation conditions, the photovoltaic panel is connected to the hydrogen production device through the photovoltaic panel interface module (141); S2. The controller (112) is turned on to confirm that the working environment meets the relevant safety requirements and the equipment operation conditions; S3, confirm that the pressure relief valve (67) is in a closed state, open the hydrogen valve (68) and connect the hydrogen storage bottle; S4, injecting pure water required for the working water level into the water tank (41) through the water inlet pipe (45), turning on the water circulation pump (42) to allow the pure water to enter the PEM electrolyzer (31), and after no bubbles emerge from the return pipe (35), operating the controller (112) to turn on the power supply of the PEM electrolyzer (31); S5. After the PEM electrolyzer (31) is powered on, the controller (112) is operated to gradually increase the current load until the rated current is reached. The oxygen generated at the anode during the electrolysis of water enters the water tank (41) through the return pipe (35) and is then discharged into the air through the exhaust hole (43), the first heat dissipation exhaust hole (111) and the second heat dissipation exhaust hole (131). The hydrogen generated at the cathode during the electrolysis of water passes through the hydrogen-water separator (51), the drying device (61) and the purification device (64) in sequence and enters the hydrogen bottle for storage; S6, when the operation of the hydrogen production device is finished, the power supply of the PEM electrolyzer (31), the hydrogen storage bottle and the hydrogen valve (68) are turned off through the controller (112), and the water in the water tank (41) is discharged through the drainage pipeline (46); S7. Turn off the controller (112) and unplug the photovoltaic panel connection wires.

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