Hydrogen production device

Abstract

An embodiment of the present application provides a hydrogen production device. The device includes: a tank body having a hollow cavity and an air outlet; a filter element disposed in the cavity with one end of the filter element fixed to one end of the tank body, dividing the cavity into a first sub-cavity and a second sub-cavity at least partially sleeved outside the first sub-cavity to allow gas molecules to pass through and block liquid molecules, the first sub-cavity being communicated with the air outlet, and the second sub-cavity being used to accommodate raw materials; a purification box disposed in the first sub-cavity, having at least one first air hole on a side facing the air outlet and at least one second air hole on a side facing the filter element, and a purification agent is provided in the purification box. The embodiment of the present application realizes that the liquid and the air outlet are located in different sub-cavities respectively, so as to keep the air outlet channel unblocked in various application scenarios and avoid the problems of unsmooth air outlet or blockage under the action of the internal liquid flow; and the gas is purified by the purification agent to avoid the degradation of the use performance or the attenuation of the service life of the fuel cell stack at the rear end.

Description

Technical Field

[0001] This application relates to the technical field of hydrogen production, and more particularly, to a hydrogen production device. Background Art

[0002] Hydrogen energy is a key type of secondary energy, and all walks of life have great hopes for the research and use of hydrogen energy. The combination of hydrogen energy and fuel cells is particularly suitable for portable clean energy products, which can replace the old traditional working batteries and generator equipment and be widely used in multiple industrial fields. The key problem restricting the development of hydrogen fuel cells is hydrogen production technology. The main requirements of the hydrogen production system include high safety and stability, large hydrogen storage density, low cost, and convenient application. Currently, hydrogen storage technologies are usually classified into: electrolytic water hydrogen production, fossil raw material hydrogen production, biological hydrogen production, solar direct photoelectric hydrogen production, solid hydrolysis hydrogen production, etc. Among them, solid hydrolysis hydrogen production has the advantages of high purity of the produced hydrogen, no need for purification, controllable hydrogen production rate, etc. At the same time, solid raw materials, such as sodium borohydride, etc., all have a high hydrogen storage density and are considered a hydrogen production technology with great application prospects.

[0003] For example, Chinese Patent Application CN111788149A discloses a portable device for producing hydrogen using a hydrogen precursor and a liquid, which includes: a main enclosure for receiving the hydrogen precursor and the liquid; an additional chamber for collecting the hydrogen produced therefrom; a separation membrane that defines the main enclosure relative to the additional chamber; and a device for discharging hydrogen from the additional chamber. The device includes a heat exchange device disposed on at least a part of the outer periphery of the main enclosure. The device has the following advantages: (1) It provides a device with a small volume and small mass while ensuring reliable hydrogen production; (2) The device can ensure effective separation between the initial product of the reaction and the produced hydrogen; (3) The device can control the temperature of the reaction area; (4) The device has a simple structure and convenient operation.

[0004] However, the existing hydrogen production devices that produce hydrogen using a hydrogen precursor and a liquid as described above all have some drawbacks that need to be solved. Specifically, they are: (1) Based on the application scenarios of portable hydrogen production devices, there will inevitably be situations where the device is tilted or even upside down. In this case, the setting of the single-side end air outlet will cause poor air outlet or blockage under the action of the internal liquid flow, resulting in the hydrogen generated inside being unable to be discharged in time, and the internal pressure exceeding the pressure resistance range of the device may cause an explosion, threatening the personal safety of the users. (2) A large amount of water vapor is generated during the hydrogen release process of common hydrolysis materials, which carries ionic compounds, causing functional attenuation of the fuel cell stack and affecting the service life. Therefore, it is necessary to efficiently purify the produced gas. Summary of the Invention

[0005] In view of the disadvantages of the existing methods, the present application provides a hydrogen production device to solve the technical problems in the prior art that the setting of the air outlet at one side end will cause poor air outlet or blockage under the action of the flow of the internal liquid, and a large amount of water vapor will be generated during the hydrogen release process, carrying ionic compounds, resulting in the functional attenuation of the fuel cell stack and affecting the service life.

[0006] An embodiment of the present application provides a hydrogen production device, including:

[0007] A tank body having a hollow cavity, and the tank body is provided with an air outlet;

[0008] A filter element is disposed in the cavity, and one end of the filter element is fixed to one end of the tank body. The filter element divides the cavity into a first sub-cavity and a second sub-cavity at least partially sleeved outside the first sub-cavity to allow gas molecules to pass through and block liquid molecules. The first sub-cavity is communicated with the air outlet, and the second sub-cavity is used to accommodate raw materials;

[0009] A purification box is disposed in the first sub-cavity. At least one first air hole is provided on the side of the purification box facing the air outlet, and at least one second air hole is provided on the side of the purification box facing the filter element. A purification agent is provided in the purification box.

[0010] In some embodiments of the present application, the filter element includes a cylindrical frame and a filter membrane fixed to the cylindrical frame;

[0011] The cylindrical frame includes a plurality of straight pipes parallel to each other and a plurality of annular pipes connected to the straight pipes. The axial direction of the straight pipes is perpendicular to the plane where the annular pipes are located.

[0012] In some embodiments of the present application, the purification box includes a cylindrical outer shell;

[0013] The cylindrical outer shell includes a first end face facing the air outlet, a second end face facing the filter element, and a first annular side wall connecting the first end face and the second end face;

[0014] Wherein, the first air hole is provided on the first end face, and the second air hole is provided on the second end face.

[0015] In some embodiments of the present application, the orthographic projection of the first air hole on the second end face is separated from the second air hole, and the orthographic projection of the first air hole is located outside the center of the second air hole far from the second end face.

[0016] In some embodiments of the present application, the purification box further includes a first inner wall fixed to the first end face and a second inner wall fixed to the second end face;

[0017] The orthographic projection of the first inner wall on the second end face is separated from the orthographic projection of the second inner wall on the second end face. The orthographic projection of the first inner wall is located outside the orthographic projection of the second inner wall away from the center of the circle of the second end face. The heights of both the first inner wall and the second inner wall are less than the distance between the first end face and the second end face.

[0018] In some embodiments of the present application, a plurality of the first air holes form an annular air hole area, and a plurality of the second air holes form a circular air hole area. The orthographic projections of both the first inner wall and the second inner wall on the second end face are annular;

[0019] The centers of the annular air hole area, the orthographic projection of the first inner wall, the orthographic projection of the second inner wall, and the circular air hole area are the same, and the radii decrease in sequence.

[0020] In some embodiments of the present application, the tank body includes a cylinder body and an end cover assembly threadedly connected to the cylinder body;

[0021] The end cover assembly includes an end cover, a gland, and a filter cover. The filter cover and the gland are arranged on opposite sides of the filter element. The gland and the end cover are arranged on opposite sides of the purification box. The air outlet is arranged on the end cover.

[0022] In some embodiments of the present application, a first ventilation opening is provided on the filter cover, and a second ventilation opening is provided on the gland. The orthographic projection of the second ventilation opening on the purification box at least partially coincides with the second air hole, and the orthographic projection of the air outlet on the purification box at least partially coincides with the first air hole.

[0023] In some embodiments of the present application, the filter cover includes a second annular side wall and a third end face covering one end of the second annular side wall;

[0024] The second annular side wall and the third end face form a third sub-chamber, and at least a part of the filter element is located in the third sub-chamber.

[0025] In some embodiments of the present application, the gland includes a bottom surface and a third annular side wall located on the side of the bottom surface close to the end cover;

[0026] A threaded hole is provided on the side of the bottom surface facing the filter cover and is threadedly connected to the filter cover. A turnbuckle is provided on the outer side of the third annular side wall away from the axis and is rotationally buckled to the end cover.

[0027] The beneficial technical effects brought by the technical solution provided in the embodiment of the present application include: the hydrogen production device uses a filter element to allow gas molecules to pass through and block liquid molecules, so that the liquid generated in the hydrogen production reaction and the gas outlet are located in different sub-chambers respectively. Therefore, the gas outlet channel can be kept unblocked in the application scenarios where the device is tilted or even turned upside down, avoiding the problems of poor gas outlet or blockage in the reactor structure with a conventional single-sided end gas outlet under the action of the internal liquid flow, and ensuring safe and stable hydrogen supply; also, a purification box filled with a purifying agent is arranged between the second sub-chamber and the gas outlet to purify the gas generated in the hydrogen production reaction, avoiding the degradation of the service performance or the attenuation of the service life of the back-end fuel cell stack caused by the impurities carried by the generated water vapor.

[0028] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or can be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments in conjunction with the drawings, in which:

[0030] Figure 1 is a schematic structural diagram of a hydrogen production device provided by an embodiment of the present application;

[0031] Figure 2 is a schematic structural diagram of a filter element provided by an embodiment of the present application;

[0032] Figure 3 is a schematic structural diagram of a purification box provided by an embodiment of the present application;

[0033] Figure 4 is a schematic cross-sectional diagram of a purification box provided by an embodiment of the present application.

[0034] Markings in the figure:

[0035] 1 - tank body; 2 - filter element; 3 - purification box;

[0036] 4 - end cover; 5 - gland; 6 - filter cover;

[0037] 21 - straight pipe; 22 - annular pipe;

[0038] 31 - first air hole; 32 - second air hole; 33 - first inner wall; 34 - second inner wall. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The embodiments of the present application will be described below with reference to the drawings in the present application. It should be understood that the embodiments described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0040] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the above" and "the" used herein may also include the plural forms. It should be further understood that the term "including" used in the specification of this application means the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence of other features, information, data, steps, operations, elements, components and / or combinations thereof supported by the art. It should be understood that when we say an element is "connected" or "coupled" to another element, this element can be directly connected or coupled to the other element, or it can mean that this element and the other element establish a connection relationship through an intermediate element. In addition, the "connection" or "coupling" used herein can include wireless connection or wireless coupling.

[0041] To make the objectives, technical solutions and advantages of this application clearer, the following will further describe the embodiments of this application in detail with reference to the accompanying drawings. It should be noted that the following embodiments can be referenced, learned from or combined with each other. For the same terms, similar features and similar implementation steps in different embodiments, they will not be described repeatedly.

[0042] The embodiment of this application provides a hydrogen production device, as Figure 1 shown Figure 1 is a schematic structural diagram of a hydrogen production device provided by the embodiment of this application. The hydrogen production device includes:

[0043] A tank body 1, having a hollow cavity, and the tank body 1 is provided with an air outlet.

[0044] A filter element 2, which is disposed in the cavity and one end of the filter element 2 is fixed to one end of the tank body 1. The filter element 2 divides the cavity into a first sub-cavity and a second sub-cavity that at least partially sleeves outside the first sub-cavity, so as to allow gas molecules to pass through and block liquid molecules. The first sub-cavity is communicated with the air outlet, and the second sub-cavity is used to accommodate raw materials.

[0045] A purification box 3, which is disposed in the first sub-cavity. At least one first air hole 31 is opened on the side of the purification box 3 facing the air outlet, and at least one second air hole 32 is opened on the side of the purification box 3 facing the filter element 2. A purification agent is disposed in the purification box 3.

[0046] In the embodiments of the present application, the hydrogen production device utilizes the filter element 2 to allow gas molecules to pass through while blocking liquid molecules, so that the liquid generated in the hydrogen production reaction and the gas outlet are located in different sub-chambers. When the hydrogen production device is in an application scenario of being tilted or even turned upside down, the liquid level changes from covering the bottom surface of the tank body 1 to covering the side wall or the top surface of the tank body 1. The filter element is a cylindrical structure with a hollow channel inside. At least part of the second sub-chamber is sleeved outside the first sub-chamber. The liquid level submerges the side wall or the top surface of the tank body 1, and at least part of the filter element 2 protrudes from the liquid level. Gas molecules can still pass through the filter element 2 and enter the first sub-chamber, so that the gas outlet channel can be kept unblocked in the application scenario where the device is tilted or even turned upside down, avoiding the problems of poor gas outlet or blockage in the conventional reactor structure with a single-side end gas outlet under the action of the internal liquid flow, and ensuring safe and stable hydrogen supply; and by arranging a purification box 3 filled with a purification agent between the second sub-chamber and the gas outlet, the gas generated in the hydrogen production reaction is purified, avoiding the reduction of the service performance or the attenuation of the service life of the rear-end fuel cell stack caused by the impurities carried by the generated water vapor.

[0047] The second sub-chamber contains hydrogen production raw materials. The hydrogen production raw materials include a fuel pack and an appropriate amount of water. The materials contained in the fuel pack include, but are not limited to, hydrolysis materials such as sodium borohydride, aluminum, and magnesium hydride. The water used includes, but is not limited to, common water sources such as tap water, lake water, river water, rainwater, and seawater. It is recommended that the added water volume does not exceed 2 / 3 of the volume of the second sub-chamber. The hydrogen production raw materials react in the second sub-chamber to generate gas and liquid. Since the filter element 2 blocks the first sub-chamber and the second sub-chamber, realizing selective permeation of gas molecules and blocking of liquid molecules, the liquid molecules cannot enter the first sub-chamber through the filter element 2 and remain in the second sub-chamber, while the gas molecules can enter the first sub-chamber through the filter element 2 and then be discharged through the gas outlet. In the path of the gas molecules from the first sub-chamber through the gas outlet, they will pass through the purification box 3 filled with a purification agent. The purification agent includes soda lime, quicklime, anhydrous calcium chloride, silica gel, molecular sieve, etc. The water molecules and ionic compounds that are not completely blocked by the filter element 2 in the mixed gas generated by the hydrogen production reaction are blocked on the side of the purification box 3 close to the second sub-chamber, and only hydrogen gas or a mixed gas mainly composed of high-purity hydrogen gas diffuses to the side of the purification box 3 close to the gas outlet. High-purity hydrogen gas refers to hydrogen gas with a purity of not less than 99.99%.

[0048] In some embodiments of the present application, as Figure 2 shown, Figure 2 is a schematic structural diagram of a filter element provided by an embodiment of the present application. The filter element 2 includes a cylindrical frame and a filter membrane fixed on the cylindrical frame;

[0049] The cylindrical frame includes a plurality of straight pipes 21 parallel to each other, and a plurality of annular pipes 22 connected to the straight pipes 21. The axial direction of the straight pipes 21 is perpendicular to the plane where the annular pipes 22 are located.

[0050] In this embodiment, the filter element 2 has a hollow channel, and an air exchange channel is provided on one side close to the air outlet. The filter membrane in the filter element 2 has a large area in contact with the gas in the second sub-chamber, and the gas in the second sub-chamber enters the first sub-chamber through the filter membrane. On one side of the filter element 2 close to the air outlet, a substrate is provided that extends radially outward and is integrated with the frame in the filter element 2. The substrate is fixedly connected to the tank body 1, thereby installing and fixing the filter element 2.

[0051] Optionally, the filter element 2 includes a cubic frame or a conical frame.

[0052] Optionally, the material of the cylindrical frame includes a polymer material.

[0053] In some embodiments of the present application, as Figure 3 shown, Figure 3 is a schematic structural diagram of a purification box provided by an embodiment of the present application. The purification box 3 includes a cylindrical outer shell;

[0054] The cylindrical outer shell includes a first end face facing the air outlet side, a second end face facing the filter element 2 side, and a first annular side wall connecting the first end face and the second end face;

[0055] Among them, the first air hole 31 is opened on the first end face, and the second air hole 32 is opened on the second end face.

[0056] In this embodiment, the connection between the first sub-chamber and the second sub-chamber is defined as the air inlet. The purification box 3 is arranged in the first sub-chamber and is located between the air inlet and the air outlet. The gas at the air inlet first passes through the second air hole 32 of the purification box 3, then passes through the first air hole 31 of the purification box 3, and finally the gas discharged from the air outlet passes through the secondary filtration of the purification box 3, leaving impurities such as ionic compounds and water molecules not completely blocked by the filter element 2 in the first sub-chamber, preventing the above-mentioned impurities from being discharged from the air outlet and causing the function attenuation of the fuel cell and affecting the service life.

[0057] In some embodiments of the present application, the orthographic projection of the first air hole 31 on the second end face is separated from the second air hole 32, and the orthographic projection of the first air hole 31 is located outside the center of the second air hole 32 far from the second end face.

[0058] In this embodiment, the positions of the first air hole 31 and the second air hole 32 are offset in the horizontal direction. Compared with the embodiment where the orthographic projection of the first air hole 31 coincides with the second air hole 32, the residence time of the mixed gas in the purification box 3 is extended, the contact area between the mixed gas and the purification agent is increased, and the filtering effect of the purification box 3 is more sufficient.

[0059] In some embodiments of the present application, as Figure 4 shown, Figure 4A cross-sectional schematic diagram of a purification cartridge provided by an embodiment of the present application. The purification cartridge 3 further includes a first inner wall 33 fixed to the first end face and a second inner wall 34 fixed to the second end face;

[0060] The orthographic projection of the first inner wall 33 on the second end face is separated from the orthographic projection of the second inner wall 34 on the second end face. The orthographic projection of the first inner wall 33 is located outside the orthographic projection of the second inner wall 34 away from the center of the circle of the second end face. The heights of both the first inner wall 33 and the second inner wall 34 are less than the distance between the first end face and the second end face.

[0061] Based on the above embodiment, a plurality of inner walls are provided between the first air hole 31 and the second air hole 32. The height of each inner wall is less than the distance between the first end face and the second end face. That is, the inner wall has a certain shielding effect on the mixed gas, but there are openings and it does not form a complete enclosure.

[0062] The mixed gas enters the purification cartridge 3 from the second air hole 32, first passes through the opening between the second inner wall 34 and the first end face, then passes through the opening between the first inner wall 33 and the second end face, and finally is discharged from the purification cartridge 3 through the second air hole 21. The mixed gas reciprocates multiple times in the purification cartridge 3, further prolonging the residence time of the mixed gas in the purification cartridge 3 and increasing the contact area between the mixed gas and the purification agent, making the filtering effect of the purification cartridge 3 more sufficient.

[0063] In another embodiment of the present application, the hydrogen production device further includes a third inner wall and even more than three inner walls in addition to the first inner wall 33 and the second inner wall 34. The reciprocating times of the mixed gas in the purification cartridge increase, the path distance becomes longer, the residence time becomes longer, and the filtering effect is further improved.

[0064] In some embodiments of the present application, a plurality of the first air holes 31 form an annular air hole area, a plurality of the second air holes 32 form a circular air hole area, and the orthographic projections of the first inner wall 33 and the second inner wall 34 on the second end face are both annular;

[0065] The centers of the annular air hole area, the orthographic projection of the first inner wall 33, the orthographic projection of the second inner wall 34, and the circular air hole area are the same, and the radii decrease in sequence.

[0066] In this embodiment, the profile of the purification cartridge 3 is set to be cylindrical. In the cross-sectional direction parallel to the first end face or the second end face, a plurality of second air holes 32 are evenly distributed in the circular air hole area covering the center of the circle. A plurality of first air holes 31 form an annular air hole area concentric with the circular air hole area. The orthographic projections of the first inner wall 33 and the second inner wall 34 are located between the circular air hole area and the annular air hole area.

[0067] In some embodiments of the present application, the tank body 1 includes a cylindrical body and an end cover assembly threadedly connected to the cylindrical body;

[0068] The end cover assembly includes an end cover 4, a gland 5, and a filter cover 6. The filter cover 6 and the gland 5 are disposed on opposite sides of the filter element 2, and the gland 5 and the end cover 4 are disposed on opposite sides of the purification box 3. The air outlet is disposed on the end cover 4.

[0069] In this embodiment, a threaded mechanical connection is adopted between the filter cover 6 and the gland 5 to fix the filter element 2 and form an air outlet channel. A snap-on mechanical connection is adopted between the gland 5 and the end cover 4 to form a purification chamber space for fixing the purification box 3.

[0070] In some embodiments of the present application, a first ventilation port is formed on the filter cover 6, a second ventilation port is formed on the gland 5, a positive projection of the second ventilation port on the purification box 3 at least partially coincides with the second air hole 32, and a positive projection of the air outlet on the purification box 3 at least partially coincides with the first air hole 31.

[0071] In this embodiment, the mixed gas in the second sub-chamber first enters the filter element 2 through the first ventilation port on the filter cover 6, and then enters the purification box 3 through the second ventilation port on the gland 5, and is discharged from the air outlet through the first air hole 31 and the second air hole 32 of the purification box 3 in sequence.

[0072] The air outlet of the tank body 1 is located on the end cover 4. A concave hole is provided on the inner side surface of the end cover 4. There is a gap between the concave hole, that is, the end cover 4 and the purification box 3. The aperture of the concave hole can cover all the first air holes 31 on the end face of the purification box 3. Hydrogen can reach the air outlet through the gap in the concave hole from the first air hole 31.

[0073] In some embodiments of the present application, the filter cover 6 includes a second annular side wall and a third end face covering one end of the second annular side wall;

[0074] The second annular side wall and the third end face form a third sub-chamber, and at least a part of the filter element 2 is located in the third sub-chamber.

[0075] In this embodiment, the filter cover 6 is of a long cylindrical structure. The second annular side wall and the third end face form a passage that is only closed at one end. The height of the filter cover 6 is less than the depth of the cylindrical body in the tank body 1. On this basis, it can be adjusted according to the required water consumption. The side wall of the filter cover 6 is provided with a first ventilation port to connect the second sub-chamber with the air passage in the filter cover 6. The inner diameter of the cylinder of the filter cover 6 is slightly larger than the outer diameter of the cylindrical frame of the filter element 2. The third sub-chamber of the filter cover 6 is used to accommodate at least a part of the filter element 2, and a reserved gap facilitates installation and replacement.

[0076] In some embodiments of the present application, the gland 5 includes a bottom surface and a third annular side wall located on the side of the bottom surface close to the end cap 4;

[0077] A threaded hole is provided on the side of the bottom surface facing the filter cover 6 and is threadedly connected to the filter cover 6. A snap button is provided on the outer side of the third annular side wall away from the axis and is snap-connected to the end cap 4.

[0078] In this embodiment, the bottom surface of the gland 5 is provided with a threaded hole for connecting the filter cover 6; a groove is provided on the end surface of the gland 5 for positioning and placing the purification cartridge 3; a snap button is provided outside the groove for connecting the end cap 4.

[0079] Compared with the prior art, by applying the embodiments of the present application, at least the following beneficial effects can be achieved: The hydrogen production device uses the filter element 2 to pass gas molecules and block liquid molecules, so that the liquid generated in the hydrogen production reaction and the air outlet are located in different sub-chambers respectively. Therefore, the air outlet channel can be kept unobstructed in the application scenarios where the device is tilted or even turned upside down, avoiding the problems of unsmooth air outlet or blockage in the reactor structure with a conventional single-sided end air outlet under the action of the internal liquid flow, and ensuring safe and stable hydrogen supply; also, a purification cartridge 3 filled with a purification agent is provided between the second sub-chamber and the air outlet to purify the gas generated in the hydrogen production reaction, avoiding the decline in the use performance or the attenuation of the service life of the rear-end fuel cell stack caused by the impurities carried by the generated water vapor; and a reciprocating gas path channel is provided in the purification to extend the residence time of the mixed gas in the purification cartridge 3 and increase the contact area between the mixed gas and the purification agent, making the filtering effect of the purification cartridge 3 more sufficient; all components and consumables in the hydrogen production device adopt an assembled structure, which is easy to operate during use, and the consumables are convenient to carry and replace, suitable for carrying and using in various outdoor scenarios.

[0080] In the description of the present application, the directions or position relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are the exemplary directions or position relationships based on the drawings, which are for the convenience of describing or simplifying the embodiments of the present application, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0081] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0082] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0083] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0084] The above are only some implementation manners of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical concept of the present application, other similar implementation means based on the technical idea of the present application also belong to the protection scope of the embodiments of the present application.

Claims

1. A hydrogen production device, characterized in that, it comprises: a tank body having a hollow cavity, and an air outlet is provided on the tank body; a filter element, which is placed inside the cavity and one end of the filter element is fixed to one end of the tank body. The filter element divides the cavity into a first sub-cavity and a second sub-cavity at least partially sleeved outside the first sub-cavity to allow gas molecules to pass through and block liquid molecules. The first sub-cavity is communicated with the air outlet, and the second sub-cavity is used to accommodate raw materials. The filter element includes a cylindrical frame and a filter membrane fixed on the cylindrical frame; a purification box, which is placed inside the first sub-cavity. At least one first air hole is provided on one side of the purification box facing the air outlet, and at least one second air hole is provided on one side of the purification box facing the filter element. A purifying agent is arranged in the purification box, and the purification box includes a cylindrical outer shell; the cylindrical outer shell includes a first end face facing the air outlet side, a second end face facing the filter element side, and a first annular side wall connecting the first end face and the second end face; the first air hole is opened on the first end face, and the second air hole is opened on the second end face; the orthographic projection of the first air hole on the second end face is separated from the second air hole, and the orthographic projection of the first air hole is located outside the center of the second air hole away from the second end face.

2. The hydrogen production device according to claim 1, characterized in that, the cylindrical frame includes a plurality of straight pipes parallel to each other and a plurality of annular pipes connected to the straight pipes, and the axial direction of the straight pipes is perpendicular to the plane where the annular pipes are located.

3. The hydrogen production device according to claim 1, characterized in that, the purification box further includes a first inner wall fixed to the first end face and a second inner wall fixed to the second end face; the orthographic projection of the first inner wall on the second end face is separated from the orthographic projection of the second inner wall on the second end face, and the orthographic projection of the first inner wall is located outside the orthographic projection of the second inner wall away from the center of the second end face. The heights of the first inner wall and the second inner wall are both less than the distance between the first end face and the second end face.

4. The hydrogen production device according to claim 3, characterized in that, a plurality of the first air holes form an annular air hole area, a plurality of the second air holes form a circular air hole area, and the orthographic projections of the first inner wall and the second inner wall on the second end face are both annular; the centers of the annular air hole area, the orthographic projection of the first inner wall, the orthographic projection of the second inner wall, and the circular air hole area are the same, and the radii decrease in sequence.

5. The hydrogen production device according to claim 1, characterized in that, the tank body includes a cylinder body and an end cover assembly threadedly connected to the cylinder body; the end cover assembly includes an end cover, a gland, and a filter cover. The filter cover and the gland are arranged on opposite sides of the filter element, the gland and the end cover are arranged on opposite sides of the purification box, and the air outlet is arranged on the end cover.

6. The hydrogen production device according to claim 5, characterized in that, A first ventilation opening is formed in the filter cover, a second ventilation opening is formed in the pressing cover, a positive projection of the second ventilation opening on the purification box coincides with at least a part of the second air hole, and a positive projection of the air outlet on the purification box coincides with at least a part of the first air hole.

7. The hydrogen production device according to claim 5, characterized in that the filter cover includes a second annular side wall and a third end surface covering one end of the second annular side wall; a third sub-cavity is formed by the second annular side wall and the third end surface, and at least a part of the filter element is located in the third sub-cavity.

8. The hydrogen production device according to claim 5, characterized in that the pressing cover includes a bottom surface and a third annular side wall located on a side of the bottom surface close to the end cover; threaded holes are provided on a side of the bottom surface facing the filter cover and are threadedly connected to the filter cover, and a snap button is provided on an outer side of the third annular side wall away from the axis and is snap-connected to the end cover.

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