An adaptive flow channel water electrolysis hydrogen production device

Abstract

This invention discloses an adaptive flow channel electrolysis water electrolysis hydrogen production device, relating to the field of electrolysis water electrolysis hydrogen production technology. It includes an electrolysis tank containing an electrolysis assembly and a gas collection box above the tank. The gas collection box has an exhaust pipe and an inlet pipe, the inlet pipe connecting the electrolysis tank and the gas collection box. The inlet pipe includes a first inlet section with a Venturi structure and a second inlet section containing a flexible flow channel section. An adjustment assembly is provided on the outer wall of the second inlet section, and the electrolysis tank has a pressure differential self-driven drive assembly. The first inlet section drives the drive assembly through the pressure difference generated by the flow velocity, causing the adjustment assembly to squeeze or release the flexible flow channel section, achieving stepless adaptive adjustment of the flow channel cross-section according to the hydrogen flow velocity. This invention requires no external power source and can automatically adapt to fluctuations in the gas production rate, fundamentally avoiding pressure accumulation and gas-liquid entrainment caused by excessively high flow velocity, and negative pressure backflow and gas retention caused by excessively slow flow velocity, thus improving the device's operational safety, hydrogen production efficiency, and gas purity.

Description

Technical Field

[0001] This invention relates to the field of water electrolysis for hydrogen production technology, and more particularly to an adaptive flow channel water electrolysis hydrogen production device. Background Technology

[0002] Hydrogen production through water electrolysis is a core technology for green hydrogen energy production and is widely used in new energy storage, fuel cell hydrogen supply, and other fields. The stability of gas collection and flow channel transport directly determines the safety of the device operation, gas production efficiency, and gas purity, making it a critical aspect of the water electrolysis hydrogen production system.

[0003] Currently, traditional water electrolysis hydrogen production units generally use fixed-section flow channel structures for gas collection pipelines, and the flow area of ​​the flow channel cannot be dynamically adapted to the gas production rate. In actual operation, the hydrogen production rate is prone to significant fluctuations due to factors such as electrolysis voltage, electrolyte concentration, and electrode activity. When the gas production rate is too fast and the hydrogen flow rate is too high, the fixed flow channel's flow capacity is insufficient, causing a rapid accumulation of pressure within the pipeline, leading to overpressure leaks, frequent tripping of safety valves, and other safety hazards. At the same time, high-speed airflow exacerbates gas-liquid entrainment, causing electrolyte to enter the collection system with the hydrogen, reducing hydrogen purity and corroding downstream equipment. Conversely, when the gas production rate is too slow and the hydrogen flow rate is too low, the fixed flow channel's flow area is too large, easily creating negative pressure backflow within the gas collection device. When outside air mixes with the hydrogen, it forms an explosive mixture, posing a serious safety risk. Furthermore, hydrogen stagnation within the pipeline reduces the current efficiency of the electrolyzer, accelerates electrode catalyst decay, and shortens the unit's lifespan.

[0004] While existing technologies offer improvements for optimizing electrolytic cell flow channels, such as the AEM electrolytic cell proposed in patent document CN118957613A, which uses a servo motor-driven throttling mechanism to adjust the orifice diameter of the electrolyte inlet flow channel and employs a mechanical degassing mechanism to reduce bubble blockage and improve electrolysis efficiency, this approach has significant limitations: 1. It adjusts the electrolyte liquid flow channel, not the hydrogen collection gas flow channel, thus failing to address issues like pressure imbalance, gas-liquid entrainment, and negative pressure backflow caused by hydrogen flow rate fluctuations; 2. The servo motor-driven adjustment method relies on external control commands, making it unable to adaptively adjust in real-time according to gas flow rate, and it also results in a complex structure and high energy consumption; 3. It only focuses on electrolyte circulation and defoaming, neglecting the dynamic adaptation of the gas collection flow channel, and thus cannot fundamentally address the core defect of mismatch between the fixed flow channel and the hydrogen flow rate.

[0005] In summary, existing water electrolysis hydrogen production devices generally suffer from many shortcomings, such as the inability of the gas flow channel to adaptively adjust, the flow rate fluctuations easily causing safety and efficiency problems, existing improvement schemes only targeting the liquid flow channel, and the lack of fluid self-driven adaptive adjustment capabilities.

[0006] To address this, the present invention proposes an adaptive flow channel electrolysis hydrogen production device. By sensing changes in hydrogen flow rate in real time through a Venturi structure, and using pipeline pressure difference to self-drive adjustment of the flexible flow channel cross-section, dynamic stepless adaptation between the flow area and hydrogen flow rate is achieved. This fundamentally solves problems such as pressure accumulation and gas-liquid entrainment caused by excessive flow rate, and negative pressure backflow and gas retention caused by excessively slow flow rate, significantly improving the device's operational safety, gas production stability, and hydrogen production efficiency. Summary of the Invention

[0007] This application is made in view of the above and other ideas.

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a water electrolysis hydrogen production device that is self-driven by Venturi pressure difference and adaptively adjusts the flow channel cross-section. It requires no external power, automatically adapts to fluctuations in hydrogen flow rate, and eliminates problems such as pressure accumulation, gas-liquid entrainment, negative pressure backflow, and gas retention.

[0009] The technical solution adopted to solve the technical problem of the present invention is to provide an adaptive flow channel electrolysis water electrolysis hydrogen production device; comprising an electrolysis tank, wherein an electrolysis component for electrolysis water electrolysis hydrogen production is provided inside the electrolysis tank, and a gas collecting box for collecting hydrogen and oxygen is provided above the electrolysis tank, characterized in that: the gas collecting box is provided with an exhaust pipe and an intake pipe, the intake pipe connecting the electrolysis tank and the gas collecting box; the intake pipe includes a first venturi-type intake section and a second intake section connected in sequence, the second intake section having a flexible flow channel section; the outer wall of the second intake section is provided with an adjustment component for adjusting the flow cross section of the flexible flow channel section; the electrolysis tank is provided with a differential pressure drive component, the differential pressure drive component being connected to the first intake section and being drivenly connected to the adjustment component, so as to drive the adjustment component to operate according to the hydrogen flow rate and pressure difference, thereby realizing adaptive adjustment of the flow cross section of the flexible flow channel section.

[0010] Furthermore, the first intake section is a Venturi structure, including an inlet section, a Venturi throat section, and a diffuser section arranged sequentially from bottom to top; the differential pressure drive component is connected to the Venturi throat section and the diffuser section respectively.

[0011] Furthermore, the second air intake section includes a front interface section, a rear interface section, and the flexible flow channel section connecting the two.

[0012] Furthermore, the adjustment assembly includes a front disc fixed to the front interface section, a rear disc fixed to the rear interface section, and an adjustment rotating cylinder rotatably disposed between the front disc and the rear disc; the front disc is pivotally connected to a plurality of arc-shaped extrusion blocks, and the adjustment rotating cylinder is hinged to the arc-shaped extrusion blocks via a transmission connecting rod.

[0013] Furthermore, the rear disc body is provided with a limiting protrusion, and the adjusting rotating cylinder is provided with an arc-shaped limiting groove that cooperates with the limiting protrusion.

[0014] Furthermore, the differential pressure drive assembly includes a drive gear, a transmission rack, a differential pressure drive cylinder, a piston rod, and a separating piston; the separating piston divides the differential pressure drive cylinder into a first chamber and a second chamber, which are respectively connected to the first air intake section through pipelines.

[0015] Furthermore, the differential pressure driving component also includes a first connecting pipe and a second connecting pipe; the first connecting pipe connects the Venturi throat section and the first cavity, and the second connecting pipe connects the diffuser section and the second cavity, so as to indirectly detect the hydrogen flow rate through the change of pressure difference.

[0016] Furthermore, the piston rod is fitted with a return spring, which is used to push the separating piston to return to its original position.

[0017] Furthermore, the electrolysis assembly includes a diaphragm, a battery, a positive electrode rod, and a negative electrode rod; the electrolysis tank is divided into two chambers by the diaphragm, with the positive electrode rod and the negative electrode rod extending into the two chambers respectively.

[0018] Furthermore, the electrolysis tank is equipped with a water supply pipe for replenishing the electrolyzed water.

[0019] Compared with the prior art, the advantages of the technical solution of this application include at least the following: 1. This invention uses a Venturi structure as a flow velocity sensing unit, and utilizes the strong coupling relationship between the hydrogen flow velocity change and the throat-diffusion section pressure difference change to accurately and in real time sense the gas production rate fluctuation; and uses this pressure difference as a power source to drive the pressure difference drive component, and link the adjustment component to realize the continuous stepless adaptive adjustment of the flow cross section of the flexible flow channel, so that the flow channel capacity matches the hydrogen flow velocity in real time, fundamentally solving the common industry problem of mismatch between fixed flow channels and gas production rate; 2. The invention relies entirely on the fluid pressure difference of the intake pipe to achieve regulation and execution, eliminating the need for external power and control components such as servo motors and electronic control units. This simplifies the structure, reduces energy consumption, and increases operational reliability, significantly reducing the cost of device operation and maintenance. 3. When the flow velocity in the air inlet channel is too fast, the present invention automatically expands the flow cross section to alleviate pressure accumulation and suppress gas-liquid entrainment; when the flow velocity is too slow, it automatically reduces the flow cross section to avoid negative pressure backflow and eliminate gas retention, fully covering fluctuating operating conditions and significantly improving the operating safety of the device and the stability of gas collection. 4. This invention, in conjunction with a limiting structure and a return spring, achieves adjustment stroke limitation and automatic reset, ensuring precise and controllable adjustment of the flow cross section, rapid response, no drift during long-term operation, and guaranteeing adjustment accuracy and device lifespan; 5. The electrolysis chamber of this invention uses a diaphragm to achieve preliminary separation of hydrogen and oxygen, and is combined with a dynamic adaptive flow channel to optimize the electrolysis reaction fluid environment, reduce the interference of gas retention on the electrode reaction, and effectively improve the electrolysis current efficiency and the purity of hydrogen products.

[0020] The embodiments of this application can achieve other advantageous technical effects not listed one by one. These other technical effects may be partially described below and can be expected and understood by those skilled in the art after reading this application. Attached Figure Description

[0021] The above-described features and advantages, as well as other features and advantages, and the ways in which they are implemented, of these embodiments will become more apparent and the embodiments of this application will be better understood by referring to the following description in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the front structure of the present invention; Figure 3 For along Figure 2 A schematic diagram of the cross-sectional structure along the center section AA; Figure 4 This is a schematic diagram of the transverse cross-sectional structure of the electrolysis box in this invention; Figure 5 This is a schematic diagram of the connection structure between the intake pipe and the regulating component in this invention; Figure 6 for Figure 5 A schematic diagram of the structure in the forward view direction; Figure 7 For along Figure 6 A schematic diagram of the cross-sectional structure along the center section BB; Figure 8 for Figure 5 A schematic diagram of the structure from a side view; Figure 9 For along Figure 8 A schematic diagram of the cross-sectional structure of the center section CC.

[0022] In the diagram: 1 - Electrolysis tank, 2 - Support, 3 - Diaphragm, 4 - Battery box, 5 - Battery, 6 - Positive electrode rod, 7 - Negative electrode rod, 8 - Water supply pipe, 9 - Gas collection box, 10 - Exhaust pipe, 11 - Exhaust valve, 12 - First air intake section, 121 - Inlet section, 122 - Venturi throat section, 123 - Diffusion section, 13 - Second air intake section, 131 - Front interface section, 132 - Flexible flow channel section, 133 - Rear interface section, 14 - Adjustment assembly, 141 - Front disc, 142 - Rear disc, 143 - Adjustment rotating cylinder, 144 - Arc-shaped extrusion block, 145 - Transmission connecting rod, 146 - Arc-shaped limiting groove, 147 - Limiting protrusion, 15 - Differential pressure drive assembly, 151 - Drive gear, 152 - 153 - Drive gear, 154 - Mounting base, 155 - Differential pressure drive cylinder, 156 - Piston rod, 157 - Separating piston, 158 - First cavity, 159 - Second cavity, 1510 - Return spring, 1511 - Drive rack, 1512 - First connecting pipe, 1513 - Second connecting pipe. Detailed Implementation

[0023] The details of one or more embodiments of this application will be set forth in the following description of the accompanying drawings and specific embodiments. Other features, objects, and advantages of this application will become clear from these descriptions, drawings, and claims.

[0024] It should be understood that the illustrated and described embodiments are not limited in application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the accompanying drawings. The illustrated embodiments may be other embodiments and can be implemented or performed in various ways. The examples are provided by way of explanation rather than limitation of the disclosed embodiments. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of this application without departing from the scope or spirit of this disclosure. For example, features illustrated or described as part of one embodiment may be used with another embodiment to still produce another embodiment. Therefore, this disclosure covers such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0025] Similarly, it is understood that the phrases and terms used in this document are for descriptive purposes and should not be considered restrictive. The use of “including,” “contains,” or “has,” and their variations, in this document is intended to include, in an open-ended manner, the items listed thereafter, their equivalents, and any additional items.

[0026] The present application will now be described in more detail with reference to various embodiments and examples of several aspects thereof.

[0027] One of the objectives of the embodiments described below is to address the aforementioned deficiencies, as well as other problems.

[0028] Example: Please refer to Figure 1-9 As shown, an adaptive flow channel electrolysis water electrolysis hydrogen production device includes an electrolysis tank 1, an electrolysis component for electrolyzing water to produce hydrogen is provided inside the electrolysis tank 1, a gas collecting box 9 for collecting hydrogen and oxygen generated by electrolysis is provided above the electrolysis tank 1, an exhaust pipe 10 and an inlet pipe are provided on the gas collecting box 9, an exhaust valve 11 is provided on the exhaust pipe 10, and the end of the inlet pipe away from the gas collecting box 9 is connected to the electrolysis tank 1. The intake pipe includes a first intake section 12 and a second intake section 13 that are interconnected. The end of the first intake section 12 away from the second intake section 13 is connected to the electrolysis tank 1, and the end of the second intake section 13 away from the first intake section 12 is connected to the gas collecting box 9. The second intake section 13 includes a front interface section 131 connected to the first intake section 12 and a rear interface section 133 connected to the gas collecting box 9. A flexible section 132 is provided between the front interface section 131 and the rear interface section 133. The outer wall of the second intake section 13 is provided with a regulating device for adjusting the expansion or contraction of the flexible section 132. The section assembly 14 and the adjustment assembly 14 include a front disc body 141 connected to the front interface section 131, a rear disc body 142 connected to the rear interface section 133, and a rotating cylinder 143 rotatably mounted between the front disc body 141 and the rear disc body 142. Multiple arc-shaped pressure blocks 144 are rotatably mounted on the end face of the front disc body 141. The inner wall of the rotating cylinder 143 is hinged with the same number of transmission connecting rods 145 as the number of arc-shaped pressure blocks 144. The free end of the transmission connecting rod 145 is hinged to the adjacent arc-shaped pressure block 144. The electrolysis tank 1 is also provided with a drive assembly 15 for driving the rotating cylinder 143 to rotate.

[0029] Specifically, electrolysis produces gas: the electrolysis components in the electrolysis tank 1 are the core of hydrogen production. The battery 5 supplies power to the two chambers separated by the diaphragm 3 through the positive electrode 6 and the negative electrode 7, causing the electrolyte to undergo an electrochemical reaction to generate hydrogen and oxygen; gas transportation: the gas generated by electrolysis is transported through an inlet pipe route connecting the first inlet section 12 and the second inlet section 13. The first inlet section 12 is connected to the electrolysis tank 1, and the second inlet section 13 is connected to the gas collection box 9. Finally, the gas is collected in the gas collection box 9 and discharged controllably through the exhaust pipe 10 and the exhaust valve 11; dynamic flow regulation: the second inlet section 1 3. A deformable air supply channel is formed by the front interface section 131, the flexible section 132, and the rear interface section 133. The front disc 141 and the rear disc 142 of the adjusting component 14 are fixed to the front interface section 131 and the rear interface section 133, respectively. The rotating cylinder 143 is rotatably installed between the two discs. Its inner wall is hinged to the arc-shaped pressure block 144 on the front disc 141 through the transmission connecting rod 145. The driving component 15 drives the rotating cylinder 143 to rotate, and drives the arc-shaped pressure block 144 to open and close through the transmission connecting rod 145, thereby squeezing or releasing the flexible section 132 and changing the flow cross section of the second air intake section 13.

[0030] As a technical optimization of the present invention, a limiting post 147 is fixedly installed on the outer edge of the end face of the rear disc body 142, and a limiting groove 146 is opened on the rotating cylinder 143. The limiting post 147 is inserted into the inside of the limiting groove 146, and the curvature of the limiting groove 146 is the same as the curvature of the rotating cylinder 143.

[0031] Specifically, when the drive assembly 15 drives the rotating cylinder 143 to rotate, the limiting post 147 slides along the limiting groove 146 to limit the maximum rotation angle of the rotating cylinder 143 and prevent it from rotating excessively.

[0032] As a technical optimization of the present invention, multiple arc-shaped pressure blocks 144 are evenly distributed along the circumferential direction of the front disc body 141. One end of each arc-shaped pressure block 144 is pivotally connected to the front disc body 141 through a rotating shaft. The multiple arc-shaped pressure blocks 144 move through the rotating cylinder 143 and the transmission connecting rod 145 to form a central channel in a closed or open state.

[0033] Specifically, when the rotating cylinder 143 rotates, the arc-shaped pressure block 144 is synchronously driven to rotate around the rotating shaft through the transmission connecting rod 145. When it rotates to the preset angle, the central channel flow section of the multiple arc-shaped pressure blocks 144 is minimized when they are spliced ​​together to form a closed state. When rotating in the opposite direction, the arc-shaped pressure block 144 opens outward to form the central channel flow section of the open state, which is maximized and can realize continuous stepless adjustment of the flow section.

[0034] As a technical optimization of the present invention, the drive assembly 15 includes a gear 151 rotatably mounted below the rear disc body 142, teeth 152 meshing with the gear 151 are provided on the outer wall of the rotating cylinder 143, a cylinder body 154 is mounted on the electrolysis tank 1, a piston rod 155 sliding along its axial direction is provided inside the cylinder body 154, a rack 1510 meshing with the gear 151 is mounted at the front end of the piston rod 155, a piston plate 156 is mounted in the middle of the piston rod 155, the piston plate 156 is slidably connected in the cylinder body 154, and the inner cavity of the cylinder body 154 is divided into two independent and sealed first cavities 157 and second cavities 158 by the piston plate 156, a first connecting pipe 1511 and a second connecting pipe 1512 are connected on the outer wall of the cylinder body 154, the first connecting pipe 1511 communicates to the inside of the first cavity 157, and the second connecting pipe 1512 communicates to the inside of the second cavity 158.

[0035] Specifically, the power source is obtained as follows: the cylinder body 154 is fixed to the electrolysis tank 1 by the mounting base 153, and the internal piston plate 156 divides it into a sealed first chamber 157 and a second chamber 158. The first connecting pipe 1511 and the second connecting pipe 1512 respectively connect the two chambers to the intake pipe, which can sense the pressure change in the intake pipe; the power transmission is as follows: the pressure change in the intake pipe pushes the piston plate 156 to drive the piston rod 155 to slide axially, and the rack 1510 at the front end of the piston rod 155 meshes with the gear 151, converting the linear motion into the rotational motion of the gear 151; the drive and flow regulation are as follows: the gear 151 meshes with the teeth 152 on the outer wall of the rotating cylinder 143, driving the rotating cylinder 143 to rotate, and finally realizing the automatic flow regulation of the regulating component 14.

[0036] As a technical optimization of the present invention, a return spring 159 is sleeved on the outer wall of the piston rod 155. One end of the return spring 159 is connected to the inner wall of the first cavity 157, and the other end of the return spring 159 is connected to the piston plate 156. Under the initial elastic force of the return spring 159, the piston plate 156 is pushed to the middle of the cylinder 154.

[0037] Specifically, when the change in hydrogen flow rate causes a change in the pressure difference in the intake pipe, the piston plate 156 slides against the elastic force of the return spring 159; when the flow rate returns to stability and the pressure difference disappears, the elastic force of the return spring 159 pushes the piston plate 156 to reset, causing the rack 1510, gear 151 and rotating cylinder 143 to return to their initial state, so that the flow cross section is adapted to a stable flow rate.

[0038] As a technical optimization of the present invention, the first intake section 12 includes an inlet section 121, a throat section 122 and a diffuser section 123 arranged sequentially from bottom to top. The inlet section 121 is connected to the electrolysis tank 1, the diffuser section 123 is connected to the front interface section 131, the end of the first connecting pipe 1511 away from the cylinder body 154 is connected to the inside of the throat section 122, and the end of the second connecting pipe 1512 away from the cylinder body 154 is connected to the inside of the diffuser section 123.

[0039] Specifically, the first intake section 12 adopts a Venturi structure, with the inlet section 121 connected to the electrolyzer 1 and the diffuser section 123 connected to the front interface section 131 of the second intake section 13. According to the Venturi effect, the faster the hydrogen flow rate, the lower the pressure in the throat section 122 and the higher the pressure in the diffuser section 123, and the pressure difference between the two fluctuates regularly with the flow rate. The first connecting pipe 1511 transmits the pressure of the throat section 122 to the first chamber 157 of the cylinder 154, and the second connecting pipe 1512 transmits the pressure of the diffuser section 123 to the second chamber 158. The change in pressure difference accurately reflects the hydrogen flow rate, providing a real-time and accurate flow adjustment signal for the drive component 15.

[0040] As a technical optimization of the present invention, an mounting base 153 is fixedly installed on the top of the electrolysis tank 1, and the cylinder body 154 is fixedly installed on the mounting base 153.

[0041] Specifically, a mounting base 153 is fixed on the top of the electrolysis tank 1, and the cylinder 154 of the drive assembly 15 is fixed on the mounting base 153, so that the cylinder 154 and the electrolysis tank 1 remain relatively stationary, ensuring the structural stability when the piston rod 155 slides and the rack 1510 meshes with the gear 151.

[0042] As a technical optimization of the present invention, the electrolysis assembly includes a support 2 and a battery box 4 installed on the bottom surface of the electrolysis tank 1. A storage battery 5 is installed inside the battery box 4. The interior of the electrolysis tank 1 is divided into two chambers by a diaphragm 3. A positive electrode rod 6 is connected to the positive terminal of the storage battery 5, and a negative electrode rod 7 is connected to the negative terminal of the storage battery 5. The positive electrode rod 6 and the negative electrode rod 7 extend into the two chambers respectively.

[0043] Specifically, the electrolysis assembly consists of a support 2, a battery box 4, a storage battery 5, a positive electrode rod 6, a negative electrode rod 7, and a diaphragm 3. The support 2 is installed on the bottom surface of the electrolysis tank 1 to support the battery box 4 and the storage battery 5 inside. The diaphragm 3 divides the inside of the electrolysis tank 1 into two independent chambers. The positive electrode of the storage battery 5 is connected to the positive electrode rod 6, and the negative electrode is connected to the negative electrode rod 7. The two electrode rods extend into the two chambers respectively. After being energized, oxygen evolution and hydrogen evolution reactions occur in the two chambers respectively. The diaphragm 3 prevents hydrogen and oxygen from mixing, thus achieving preliminary gas separation.

[0044] As a technical optimization of the present invention, a water inlet corresponding to two chambers is provided on the back of the electrolysis tank 1, and a water inlet pipe 8 is connected inside the water inlet.

[0045] Specifically, the water supply pipe 8 can replenish the electrolytic water in the two chambers of the electrolysis tank 1 during the electrolysis hydrogen production process.

[0046] The overall working principle is as follows: The electrolysis unit is the core of hydrogen production. A support 2 mounted on the bottom of the electrolysis tank 1 supports the battery box 4. The battery 5 inside the battery box 4 provides the electrical energy required for electrolysis. The electrolysis tank 1 is divided into two independent chambers by a diaphragm 3. The positive terminal of the battery 5 is connected to the positive electrode rod 6, and the negative terminal is connected to the negative electrode rod 7, with the positive electrode rod 6 and negative electrode rod 7 extending into the two chambers respectively. After electrolyte is injected into the electrolysis tank 1, the battery 5 supplies power to cause an electrochemical reaction between the positive electrode rod 6 and the negative electrode rod 7, decomposing water to produce hydrogen and oxygen. The diaphragm 3 achieves preliminary separation of hydrogen and oxygen, preventing premature mixing of the gases.

[0047] Hydrogen and oxygen produced by electrolysis are transported to the gas collection box 9 through the intake pipe. The intake pipe consists of a first intake section 12 and a second intake section 13 that are interconnected. The gas first enters through the inlet section 121 of the first intake section 12, flows through the throat section 122 and the diffuser section 123 in sequence, and then connects with the front interface section 131 of the second intake section 13 through the diffuser section 123 of the first intake section 12 to enter the second intake section 13. Finally, it enters the gas collection box 9 through the rear interface section 133. The collected gas can be discharged as needed through the exhaust pipe 10 and the exhaust valve 11.

[0048] In the dynamic adjustment stage for flow rate adaptation, the flow cross-section of the second intake section 13 is dynamically adjusted through the linkage of the adjustment component 14 and the drive component 15 to adapt to fluctuations in hydrogen flow rate. The first intake section 12 adopts a Venturi structure with an inlet section 121, a throat section 122, and a diffuser section 123. Changes in hydrogen flow rate will cause changes in the pressure difference between the throat section 122 and the diffuser section 123. The first connecting pipe 1511 of the drive component 15 transmits the internal pressure of the throat section 122 to the first cavity 157 of the cylinder 154, and the second connecting pipe 1512 transmits the internal pressure of the diffuser section 123 to the second cavity 158 of the cylinder 154, thereby achieving dynamic adjustment of the hydrogen flow rate. Indirect detection of gas flow rate: The cylinder 154 is fixed to the top of the electrolysis tank 1 by the mounting base 153. Its interior is divided into a sealed first chamber 157 and a second chamber 158 by the piston plate 156. When the hydrogen flow rate is too fast, i.e., the reaction is too fast, the pressure difference between the throat section 122 and the diffuser section 123 increases, pushing the piston plate 156 to compress the return spring 159 and slide along the axial direction of the cylinder 154. When the hydrogen flow rate is too slow, i.e., the reaction is too slow, the pressure difference decreases, and the return spring 159 pushes the piston plate 156 to return to its original position. The sliding of the piston plate 156 drives the piston rod 155 to move synchronously, thereby driving the rack 1510 at the front end of the piston rod 155 to move. 10 meshes with gear 151, which is rotatably mounted below the rear disc 142, converting linear motion into rotational motion of gear 151; gear 151 meshes with teeth 152 on the outer wall of rotating cylinder 143, driving rotating cylinder 143 to rotate between front disc 141 and rear disc 142. A transmission connecting rod 145 hinged to the inner wall of rotating cylinder 143 is hinged to an arc-shaped pressure block 144 pivotally connected to the end face of front disc 141, and multiple arc-shaped pressure blocks 144 are evenly distributed along the circumference of front disc 141. When rotating cylinder 143 rotates, the transmission connecting rod 145 drives the arc-shaped pressure blocks 144 to rotate around the axis of rotation; when the flow rate is too high, the arc-shaped pressure blocks 144 open to form a larger... The central channel expands by releasing the flexible section 132, increasing the flow cross-section to accommodate high-speed airflow. When the flow rate is too slow, the arc-shaped pressure block 144 contracts to reduce the central channel and compresses the flexible section 132 to shrink, reducing the flow cross-section and preventing negative pressure. The flow capacity of the second air inlet section 13 is dynamically adjusted by the adjustment component 14, ensuring that the hydrogen flow rate always matches the air intake requirements of the gas collecting box 9. This avoids problems such as pressure buildup and gas-liquid entrainment caused by excessively fast flow rate at the fixed inlet, as well as negative pressure backflow and gas retention caused by excessively slow flow rate. Ultimately, this achieves stable collection of hydrogen and oxygen in the gas collecting box 9, ensuring safe operation of the device, product purity, and electrolysis efficiency.

[0049] The foregoing description of the embodiments described above is provided for illustrative purposes. This foregoing description is not intended to be exhaustive, nor is it intended to limit the application to the precise configurations, constructions, and / or steps disclosed. Clearly, many modifications and variations can be made in light of the teachings above. The scope of the invention and all its equivalents are intended to be defined by the appended claims.

Claims

1. An electrolytic water production device with an adaptive flow channel, characterized in that, The device includes an electrolysis tank (1), which is equipped with an electrolysis assembly for producing hydrogen by electrolysis of water. A gas collecting box (9) for collecting hydrogen and oxygen is located above the electrolysis tank (1). The gas collecting box (9) is characterized by having an exhaust pipe (10) and an intake pipe, the intake pipe connecting the electrolysis tank (1) and the gas collecting box (9). The intake pipe includes a first Venturi-type intake section (12) and a second intake section (13) connected sequentially. The second intake section (13) is equipped with a flexible... The flexible flow channel section (132) is provided with an adjustment component (14) on the outer wall of the second air intake section (13) for adjusting the flow cross section of the flexible flow channel section (132); the electrolysis tank (1) is provided with a differential pressure drive component (15), which is connected to the first air intake section (12) and driven to the adjustment component (14) so ​​as to drive the adjustment component (14) to act according to the hydrogen flow rate and pressure difference, thereby realizing the adaptive adjustment of the flow cross section of the flexible flow channel section (132).

2. The adaptive flow channel electrolysis water production device for hydrogen production according to claim 1, characterized in that: The first intake section (12) is a venturi structure, including an inlet section (121), a venturi throat section (122) and a diffuser section (123) arranged sequentially from bottom to top; the differential pressure drive component (15) is connected to the venturi throat section (122) and the diffuser section (123) respectively.

3. The adaptive flow channel electrolysis water production device for hydrogen production according to claim 1, characterized in that: The second air intake section (13) includes a front interface section (131), a rear interface section (133), and the flexible flow channel section (132) connecting the two.

4. The adaptive flow channel electrolysis water production device for hydrogen production according to claim 3, characterized in that: The adjustment assembly (14) includes a front disc body (141) fixed to the front interface section (131), a rear disc body (142) fixed to the rear interface section (133), and an adjustment rotating cylinder (143) rotatably disposed between the front disc body (141) and the rear disc body (142); the front disc body (141) is pivotally connected to a plurality of arc-shaped extrusion blocks (144), and the adjustment rotating cylinder (143) is hinged to the arc-shaped extrusion blocks (144) through a transmission connecting rod (145).

5. The adaptive flow channel electrolysis water production device for hydrogen production according to claim 4, characterized in that: The rear disc body (142) is provided with a limiting protrusion (147), and the adjusting rotating cylinder (143) is provided with an arc-shaped limiting groove (146) that cooperates with the limiting protrusion (147).

6. The adaptive flow channel electrolysis water production device for hydrogen production according to claim 1, characterized in that: The differential pressure drive assembly (15) includes a drive gear (151), a transmission rack (1510), a differential pressure drive cylinder (154), a piston rod (155), and a separating piston (156); the separating piston (156) divides the differential pressure drive cylinder (154) into a first chamber (157) and a second chamber (158), which are respectively connected to the first air intake section (12) through pipelines.

7. The adaptive flow channel electrolysis water production device for hydrogen production according to claim 6, characterized in that: The differential pressure drive assembly (15) further includes a first connecting pipe (1511) and a second connecting pipe (1512); the first connecting pipe (1511) connects the Venturi throat section (122) and the first cavity (157), and the second connecting pipe (1512) connects the diffuser section (123) and the second cavity (158) to indirectly detect the hydrogen flow rate through the change of pressure difference.

8. The adaptive flow channel electrolysis water production device for hydrogen production according to claim 6, characterized in that: The piston rod (155) is fitted with a return spring (159), which is used to push the separator piston (156) to return to its original position.

9. The adaptive flow channel electrolysis water production device for hydrogen production according to claim 1, characterized in that: The electrolysis assembly includes a diaphragm (3), a battery (5), a positive electrode (6), and a negative electrode (7); the electrolysis tank (1) is divided into two chambers by the diaphragm (3), and the positive electrode (6) and the negative electrode (7) extend into the two chambers respectively.

10. The adaptive flow channel electrolysis water production device for hydrogen production according to claim 9, characterized in that: The electrolysis tank (1) is equipped with a water supply pipe (8) for replenishing electrolyzed water.

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