Hydrogen circulation device and hydrogen circulation method

Abstract

The present invention provides a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device includes a circulation device body and an ejection channel, the circulation device body includes an ejection chamber, a separation chamber and a slow-release chamber, the circulation device body is further provided with an intake channel, at least one recycling intake channel and an exhaust channel, wherein the ejection channel is arranged in the intake channel of the circulation device body, the circulation device body is further provided with a first channel and a second channel, wherein the ejection channel introduces hydrogen to the second channel, the hydrogen passes through the second channel to the slow-release chamber, the second channel forms a negative pressure due to the hydrogen, and the recycled hydrogen is sucked into the slow-release chamber from the recycling intake channel by means of negative pressure.

Description

Technical Field

[0001] The present invention relates to the field of fuel cells, and in particular to a hydrogen circulation device and a hydrogen circulation method. Background Art

[0002] The hydrogen circulation system is a key component of the fuel cell power module, used to supply hydrogen to the fuel cell stack and purify the hydrogen exhaust for recycling. In the fuel cell hydrogen supply system, hydrogen enters the fuel cell stack, undergoes a chemical reaction to generate electricity, and then discharges a mixture of hydrogen, water vapor, and liquid water. If this mixture is discharged directly into the air, it will result in a large amount of hydrogen waste and pose a safety hazard. Therefore, the mixture must be recycled. Before recycling, the mixed gas needs to undergo a steam-water separation process to separate the liquid water from the hydrogen. Liquid water entering the fuel cell stack can cause flooding, reducing the efficiency of the fuel cell system.

[0003] Existing fuel cell hydrogen supply systems process the mixed gas through components such as a steam-water separator, a circulation pump, and a slow release device before it enters the fuel cell stack. This solution is complex, has a low level of integration, and is costly.

[0004] like Figure 1 An embodiment of a fuel cell hydrogen supply system of the prior art is disclosed, wherein the fuel cell hydrogen supply system includes a hydrogen supply unit 10p, a slow release device 20p, a circulation pump 30p and a gas-liquid separator 40p, wherein the slow release device 20p is arranged between the hydrogen supply unit 10p and a fuel cell stack 200p, and the hydrogen supply unit 10p and the fuel cell stack 200p are connected by the slow release device 20p. The gas-liquid separator 40p is connected to the hydrogen output end of the fuel cell stack 200p and is connected to the circulation pump 30p, wherein the circulation pump 30 passes the hydrogen discharged from the fuel cell stack through the gas-liquid separator 40 and then passes it into the slow release device 20p, so that the hydrogen after the reaction of the fuel cell stack 200p is mixed with the hydrogen in the hydrogen supply unit 10p and then passed into the reaction fuel cell stack.

[0005] It is understandable that the fuel cell hydrogen supply system of the prior art is composed of multiple dispersed and interconnected components. This poor integration will take up a large space, thereby increasing the volume of the entire fuel cell, which is not conducive to the miniaturization of the fuel cell. In addition, the fuel cell hydrogen supply system of the prior art also has at least one of the following defects: due to the dispersed system structure, the temperature, pressure and humidity of the hydrogen supply system are difficult to accurately monitor; the gas-liquid separation of hydrogen in the fuel cell hydrogen supply system will affect the humidity regulation of the hydrogen in the hydrogen supply system, making it difficult to adjust the humidity of the hydrogen in the hydrogen supply system in a timely manner as needed. In addition, the fuel cell hydrogen supply system of the prior art usually requires a hydrogen circulation pump to provide power for the circulation of hydrogen. The hydrogen circulation pump is large in size and consumes a lot of power, which is not conducive to improving the power density of the fuel cell system. Summary of the Invention

[0006] A major advantage of the present invention is that it provides a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device utilizes the ejection effect to inhale hydrogen discharged from the fuel cell stack, and recycles and utilizes the hydrogen, which is beneficial to improving the hydrogen utilization rate.

[0007] Another advantage of the present invention is that it provides a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device separates the circulating hydrogen into steam and water while recycling the hydrogen, that is, the hydrogen circulation and the steam-water separation of the fuel cell hydrogen supply system are integrated in the hydrogen circulation device, which is conducive to the miniaturization of the fuel cell hydrogen supply system.

[0008] Another advantage of the present invention is that it provides a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device buffers hydrogen pressure shocks while recycling hydrogen to stabilize the pressure of the supplied hydrogen. That is, when the hydrogen pressure fluctuates, the hydrogen circulation device buffers the hydrogen pressure to achieve stable hydrogen supply pressure; when the hydrogen pressure is released too quickly, the gas in the hydrogen circulation device can replenish hydrogen in time to avoid excessive pressure release.

[0009] Another advantage of the present invention is that it provides a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device detects hydrogen humidity and automatically adjusts the hydrogen humidity according to the detected hydrogen humidity, which is beneficial to maintaining the stability of the hydrogen humidity of the fuel cell hydrogen supply system.

[0010] Another advantage of the present invention is that it provides a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device can set a target humidity value and automatically adjust the humidity of the hydrogen output by the hydrogen circulation device according to the set target humidity value to maintain the stability of the hydrogen humidity of the fuel cell hydrogen supply system.

[0011] Another advantage of the present invention is that it provides a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device monitors the temperature, pressure and humidity of the hydrogen supplied to the fuel cell, which is conducive to maintaining the stability of the quality of the supplied hydrogen, thereby maintaining the stable operation of the fuel cell hydrogen supply system.

[0012] Another advantage of the present invention is that it provides a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device performs liquid level alarm and automatic discharge of separated water, which is beneficial to improving the working stability of the fuel cell hydrogen supply system.

[0013] Another advantage of the present invention is that it provides a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device is highly integrated and can solve the problems of integration difficulty and high cost caused by the integration of the gas supply system.

[0014] Another advantage of the present invention is that it provides a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device can effectively alleviate the fluctuation of the supply gas pressure, which is conducive to the stability of the supply gas pressure.

[0015] Another advantage of the present invention is that it provides a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device uses an isolation membrane to isolate the gas and liquid, thereby preventing the disturbance of the liquid surface by the airflow from affecting the information collection of the liquid level sensor, which is conducive to improving the accuracy of information collection.

[0016] Another advantage of the present invention is that it provides a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device uses negative pressure to inhale recycled hydrogen, which is beneficial to simplifying the structure of the fuel cell hydrogen supply system and facilitating the miniaturization of the fuel cell hydrogen supply system.

[0017] Other advantages and features of the present invention will become more apparent from the following detailed description and will be realized by means of the instrumentalities and combinations particularly pointed out in the appended claims.

[0018] According to one aspect of the present invention, a hydrogen circulation device of the present invention, which can achieve the aforementioned objects and other objects and advantages, is suitable for mixing hydrogen and recycled hydrogen, and the hydrogen circulation device comprises:

[0019] a circulation device body, the circulation device body comprising an ejection chamber, a separation chamber, and a slow-release chamber, the circulation device body further comprising an air inlet passage, at least one recirculation air inlet passage, and an air outlet passage, wherein the air inlet passage is formed in the ejection chamber, the recirculation air inlet passage is formed in the separation chamber, and the air outlet passage is formed in the slow-release chamber; and

[0020] An ejection channel, wherein the ejection channel is arranged in the air intake channel of the circulation device body, and the circulation device body is further provided with a first channel and a second channel, the first channel connects the separation chamber and the ejection chamber, and the second channel connects the ejection chamber and the slow-release chamber, wherein the ejection channel introduces hydrogen into the second channel, and the hydrogen passes through the second channel to the slow-release chamber, and the second channel forms a negative pressure through the hydrogen, so as to inhale the recycled hydrogen from the recycling intake channel into the slow-release chamber by means of negative pressure.

[0021] According to one embodiment of the present invention, the ejection chamber further includes an ejection chamber body, an ejection cavity formed in the ejection chamber body, and an ejection chamber air outlet, wherein the ejection chamber air outlet connects the ejection cavity of the ejection chamber to the second channel, the air inlet channel is positively corresponding to the ejection chamber air outlet of the ejection chamber, wherein the ejection channel extends from the air inlet channel to the ejection chamber air outlet of the ejection chamber.

[0022] According to one embodiment of the present invention, the second channel of the circulation device body further includes a main air channel and an ejection air channel connected to the main air channel, and the ejection air channel of the second channel is in a basin shape.

[0023] According to one embodiment of the present invention, it further includes at least one recirculation air intake unit and at least one air outlet unit, wherein the recirculation air intake unit is arranged in the recirculation air intake passage of the circulation device body, and the air outlet unit is arranged in the air outlet passage of the circulation device body.

[0024] According to one embodiment of the present invention, the circulation device body includes a circulation device body, an upper cover plate and a bottom plate, wherein the upper cover plate is located at the upper end of the circulation device body, the floor is located at the lower end of the circulation device body, and the circulation device body is sealedly connected to the upper cover plate and the floor, and the ejection chamber, the separation chamber and the slow-release chamber of the circulation device body are composed of the circulation device body, the cover plate and the floor, formed together or are part of their structure.

[0025] According to one embodiment of the present invention, the system further comprises an ejector air intake pipe, wherein the ejector air intake pipe is provided in the first passage, and the recirculated hydrogen in the separation chamber is sucked into the ejector chamber through the ejector air intake pipe.

[0026] According to one embodiment of the present invention, the injection air intake pipe includes an upper end portion of the injection pipe and a lower end portion of the injection pipe integrally extending downward from the upper end portion of the injection air intake pipe, wherein the upper end portion of the injection pipe leads to the injection chamber, and the lower end portion of the injection pipe leads to the separation chamber. When the recycled hydrogen enters the separation chamber, the recycled hydrogen is sucked into the injection air intake pipe to form an intake vortex, so as to circumferentially and radially suck the recycled hydrogen downward from the upper part of the separation chamber, and is sucked into the injection air intake pipe from the separation chamber circumferentially inwardly and radially upward.

[0027] According to one embodiment of the present invention, the separation chamber has a central axis, wherein the injection intake pipe is arranged along the central axis of the separation chamber, the separation chamber is cylindrical, and the intake vortex formed by the recycled hydrogen being sucked into the injection intake pipe is centered on the injection intake pipe.

[0028] According to one embodiment of the present invention, the recirculation air intake channel is located at the upper part of the separation chamber, and the internal opening of the recirculation air intake channel is located on the side of the inner wall of the separation chamber, and the opening direction of the internal opening of the recirculation air intake channel is staggered with the injection air intake pipe.

[0029] According to one embodiment of the present invention, the sustained-release chamber further comprises at least one baffle, which is vertically arranged in the sustained-release chamber, and at least one baffle is adjacent to the second channel.

[0030] According to one embodiment of the present invention, the spatial volume of the slow-release chamber is larger than the volume of the ejection chamber and the separation chamber, so that the hydrogen entering the slow-release chamber can be buffered to stabilize the gas pressure of the slow-release chamber.

[0031] According to one embodiment of the present invention, the recirculation air intake passage is provided with a first recirculation air intake passage, a second recirculation air intake passage, an external opening and an internal opening, wherein the internal opening and the external opening are connected to the first recirculation air intake passage, and the second recirculation air intake passage is connected to the first recirculation air intake passage in the ejection chamber.

[0032] According to one embodiment of the present invention, it further includes a humidity sensor, a controller and a control valve, wherein the humidity sensor and the control valve are communicatively connected to the controller, and the controller controls the control valve based on humidity data detected by the humidity sensor, wherein the control valve is located in the second recirculation intake duct, and the controller controls the working state of the control valve based on the humidity sensor, thereby controlling the opening and closing of the second recirculation intake duct.

[0033] According to one embodiment of the present invention, the humidity sensor is arranged in the slow-release chamber, and the humidity sensor is adjacent to the air outlet channel, and the control valve has a closed position and an open position. When the control valve is in the open position, the second recirculation intake duct of the recirculation intake channel is connected to the ejection chamber to allow the recirculated hydrogen to reach the ejection chamber through the second recirculation intake duct of the recirculation intake channel; when the control valve is in the closed position, the second recirculation intake duct of the recirculation intake channel is blocked, so that all the recirculated hydrogen enters the separation chamber through the first recirculation intake duct of the recirculation intake channel.

[0034] According to one embodiment of the present invention, a communication channel is provided between the separation chamber and the slow-release chamber, wherein the communication channel connects the separation chamber and the slow-release chamber to allow the liquid water collected in the separation chamber and the slow-release chamber to flow.

[0035] According to one embodiment of the present invention, it further includes a drain valve and at least one liquid level sensor, wherein the drain valve and the liquid level sensor are electrically connected to the controller, the liquid level sensor is arranged at the bottom of the separation chamber, and the drain valve is conductively connected to the separation chamber, wherein the controller controls the working state of the drain valve based on the detection data of the liquid level sensor so that the hydrogen circulation device automatically drains water.

[0036] According to one embodiment of the present invention, it further includes a drain valve and at least one liquid level sensor, wherein the drain valve and the liquid level sensor are electrically connected to the controller, the liquid level sensor is arranged at the bottom of the slow-release chamber, and the drain valve is conductively connected to the slow-release chamber, wherein the controller controls the working state of the drain valve based on the detection data of the liquid level sensor so that the hydrogen circulation device automatically drains water.

[0037] According to one embodiment of the present invention, it further includes an isolation membrane, wherein the isolation membrane is arranged in the separation chamber, the isolation membrane separates the separation chamber into a liquid-gas separation chamber and a water collection chamber, the liquid water precipitated from the separation chamber is collected in the water collection chamber through the isolation membrane, the isolation membrane is arranged in the middle or lower middle position of the separation chamber, wherein the isolation membrane is a porous structure, allowing liquid water to penetrate through.

[0038] According to another aspect of the present invention, the present invention further provides a circulation method for a hydrogen circulation device, wherein the circulation method comprises the steps of:

[0039] (a) introducing high-pressure hydrogen into a second channel of a circulation device body, introducing the hydrogen into a slow-release chamber through the second channel, and generating negative pressure in the second channel; and

[0040] (b) Recirculating hydrogen is sucked into a separation chamber from a recirculation intake passage in a negative pressure manner, and an intake vortex is formed in the separation chamber, so that the recirculating hydrogen is sucked downward from the upper part of the separation chamber circumferentially and radially downward, and is sucked from the separation chamber into a first passage circumferentially inwardly and radially upward, the recirculating hydrogen is sucked into the second passage through an ejector chamber, and then is passed into the release chamber through the second passage to be mixed with the hydrogen in the release chamber.

[0041] According to one embodiment of the present invention, the method further comprises the steps of: blocking the hydrogen gas flow and the recycled hydrogen gas flow entering the second channel by at least one baffle of the slow-release chamber, and the gas flow ejected from the second channel collides with the baffle to separate out water vapor in the gas flow.

[0042] According to one embodiment of the present invention, the step is further included: detecting the humidity in the slow-release chamber, and controlling the working state of a control valve according to a set humidity value; when the detected humidity value is less than the set target humidity value, the control valve is controlled by a controller to be in an open position, and the control valve connects a second recirculation intake duct of the recirculation intake channel to the ejection chamber to allow the recirculated hydrogen to directly reach the ejection chamber through the second recirculation intake duct of the recirculation intake channel; when the detected humidity value is greater than the set target humidity value, the controller controls the control valve to be in a closed position, and the second recirculation intake duct of the recirculation intake channel is blocked by the control valve, so that all the recirculated hydrogen enters the separation chamber through a first recirculation intake duct of the recirculation intake channel.

[0043] According to another aspect of the present invention, the present invention further provides a fuel cell hydrogen supply system suitable for a fuel cell stack, comprising:

[0044] A hydrogen circulation device, comprising:

[0045] a circulation device body, the circulation device body comprising an ejection chamber, a separation chamber, and a slow-release chamber, the circulation device body further comprising an air inlet passage, at least one recirculation air inlet passage, and an air outlet passage, wherein the air inlet passage is formed in the ejection chamber, the recirculation air inlet passage is formed in the separation chamber, and the air outlet passage is formed in the slow-release chamber; and

[0046] an ejection channel, wherein the ejection channel is provided in the air inlet channel of the circulation device body, the circulation device body further comprising a first channel and a second channel, the first channel communicating with the separation chamber and the ejection chamber, the second channel communicating with the ejection chamber and the slow-release chamber, wherein the ejection channel introduces hydrogen into the second channel, the hydrogen passes through the second channel to the slow-release chamber, the second channel forms a negative pressure due to the hydrogen, and the recycled hydrogen is sucked from the recirculation intake channel into the slow-release chamber by means of the negative pressure;

[0047] a hydrogen supply device, wherein the hydrogen circulation device is disposed between the fuel cell stack and the hydrogen supply device; and

[0048] An exhaust device is conductively connected to the fuel cell stack.

[0049] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and accompanying drawings.

[0050] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description, accompanying drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of a fuel cell hydrogen supply system in the prior art.

[0052] Figure 2 1 is an overall schematic diagram of a hydrogen circulation device according to a first preferred embodiment of the present invention.

[0053] Figure 3 2 is a front view of the hydrogen circulation device according to the first preferred embodiment of the present invention.

[0054] Figure 4A and Figure 4B 1 is an exploded schematic diagram of the hydrogen circulation device according to the first preferred embodiment of the present invention.

[0055] Figure 5 FIG. 1 is a cross-sectional view of the hydrogen circulation device according to the first preferred embodiment of the present invention, which shows the flow pattern of the hydrogen gas flow in the hydrogen circulation device.

[0056] Figure 6A FIG. 1 is a cross-sectional view of the hydrogen circulation device according to the first preferred embodiment of the present invention in one direction.

[0057] Figure 6B FIG. 4 is a cross-sectional view of the hydrogen circulation device according to the first preferred embodiment of the present invention in another direction.

[0058] Figure 6CFIG. 4 is a cross-sectional view of the hydrogen circulation device according to the first preferred embodiment of the present invention in another direction.

[0059] Figure 7A 3 is a cross-sectional view of the hydrogen circulation device according to the first preferred embodiment of the present invention, which shows the working state of the hydrogen circulation device when the humidity of the hydrogen circulation device is lower than the set value.

[0060] Figure 7B 3 is a cross-sectional view of the hydrogen circulation device according to the first preferred embodiment of the present invention, which shows the working state of the hydrogen circulation device when the humidity of the hydrogen circulation device is higher than the set value.

[0061] Figure 8 It is a cross-sectional view of another optional implementation of the hydrogen circulation device according to the first preferred embodiment of the present invention.

[0062] Figure 9 It is an overall schematic diagram of another optional implementation of a hydrogen circulation device according to the first preferred embodiment of the present invention.

[0063] Figure 10 Schematic diagram of a fuel cell hydrogen supply system according to the preferred embodiment of the present invention.

[0064] Figure 11 Schematic diagram of another optional implementation of a fuel cell hydrogen supply system according to the above preferred embodiment of the present invention. DETAILED DESCRIPTION

[0065] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0066] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0067] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0068] Referring to the accompanying drawings of the present invention Figures 2 to 7B As shown, a hydrogen circulation device 100 according to a first preferred embodiment of the present invention is explained in the following description. The hydrogen circulation device includes a circulation device body 10 and at least one ejector channel 20. The circulation device body 10 includes at least one inlet channel 101, at least one recirculation inlet channel 102, and at least one outlet channel 103. The ejector channel 20 is provided in the circulation device body 10 from the inlet channel 101. Hydrogen is introduced into the circulation device body 10 through the ejector channel 20, and the recirculated hydrogen is introduced into the circulation device body 10 through the recirculation inlet channel 102. After the hydrogen and the recirculated hydrogen are mixed in the circulation device body 10, they are discharged outward through the outlet channel 103 of the circulation device body 10. It is worth mentioning that in this preferred embodiment of the present invention, the ejector channel can be, but is not limited to, an ejector tube, that is, the ejector channel is formed by a tubular extension or the ejector channel is the tubular extension.

[0069] The circulation device body 10 includes an ejection chamber 11, a separation chamber 12, and a slow-release chamber 13, wherein the ejection chamber 11 and the separator 12 are spaced apart from and communicate with each other, the ejection chamber 11 and the slow-release chamber 13 are spaced apart from and communicate with each other, and the separation chamber 12 and the slow-release chamber 13 are spaced apart from each other. The inlet channel 101 of the circulation device body 10 is formed in the ejection chamber 11, the recirculation inlet channel 102 is formed in the separation chamber 12, and the outlet channel 103 is formed in the slow-release chamber 13. Hydrogen gas flows from the inlet channel 101 through the ejection channel 20 into the ejection chamber 11, and hydrogen gas reaches the slow-release chamber 13 through the ejection chamber 11 under the action of gas pressure. The recycled hydrogen is introduced into the separation chamber 12 through the recycled gas inlet passage 102 , wherein the recycled hydrogen in the separation chamber 12 is sucked into the ejection chamber 11 , and then introduced into the slow-release chamber 13 through the ejection chamber 11 for gas mixing.

[0070] In detail, a first channel 104 is provided between the ejection chamber 11 and the separation chamber 12, wherein the first channel 104 connects the ejection chamber 11 and the separation chamber 12, and the recycled hydrogen in the separation chamber 12 is drawn into the ejection chamber 11 through the first channel 104. A second channel 105 is provided between the ejection chamber 11 and the sustained-release chamber 13, wherein the second channel 105 connects the ejection chamber 11 and the sustained-release chamber 13, wherein the ejection channel 20 introduces hydrogen into the second channel 105 of the circulation device body 10, and then into the sustained-release chamber 13 through the second channel 105. When the ejection channel 20 introduces hydrogen into the second channel 105 at high pressure, a negative pressure is formed in the second channel 105 due to the ejection effect, so that the recycled hydrogen in the separation chamber 12 is drawn into the ejection chamber 11, and then into the sustained-release chamber 13 through the ejection chamber 11.

[0071] like Figure 6A As shown, the ejection chamber 11 further includes an ejection chamber body 111, an ejection cavity 110 formed in the ejection chamber body 111, and an ejection chamber air outlet 112, wherein the ejection chamber air outlet 112 connects the ejection cavity 110 of the ejection chamber 11 to the second channel 105. The air inlet channel 101 corresponds to the ejection chamber air outlet 112 of the ejection chamber 11 in a positive direction, wherein the ejection channel 20 extends from the air inlet channel 101 to the ejection chamber air outlet 112 of the ejection chamber 11, allowing the ejection channel 20 to form a negative pressure in the second channel 105 based on the ejection effect.

[0072] The ejector 20 is installed in the ejection chamber 11 from the air inlet channel 101, wherein the ejector 20 has an ejector channel 201 and an ejector port 202 connected to the ejector channel 201, wherein the hydrogen gas flows through the ejector channel 201 of the ejector 20 and reaches the second channel 105 from the ejector port 202. It is worth mentioning that in this preferred embodiment of the present invention, the ejector channel 20 extends from the air inlet channel 101 to the second channel 105, that is, the ejector port 202 of the ejector 20 is located in the second channel 105, so that the ejector port 202 of the ejector channel 20 forms a negative pressure in the second channel 105 based on the ejection effect, and the gas in the ejection cavity 110 of the ejection chamber 11 is sucked into the second channel 105 due to the negative pressure.

[0073] The separation chamber 12 includes a separation chamber body 121 and a separation cavity 120 formed in the separation chamber body 121. The first channel 104 and the recirculation intake channel 102 are formed in the separation chamber body 121, and the first channel 104 and the recirculation intake channel 102 are connected to the separation cavity 120 of the separation chamber 12. The recirculated hydrogen enters the separation cavity 120 of the separation chamber 12 from the recirculation intake channel 102. The recirculated hydrogen in the separation cavity 120 is sucked into the ejection chamber 11 through the first channel 104 by the negative pressure generated by the ejection channel 20 in the second channel 105.

[0074] The slow-release chamber 13 includes a slow-release chamber body 131, a slow-release cavity 130 formed in the slow-release chamber body 131, and a slow-release chamber air inlet 132, wherein the slow-release chamber air inlet 132 connects the second channel 105 to the slow-release cavity 130, and the injection channel 20 passes hydrogen and recycled hydrogen into the slow-release cavity 130 of the slow-release chamber 13 through the second channel 105.

[0075] Preferably, in this preferred embodiment of the present invention, the second channel 105 of the circulation device body 10 is a throat structure, that is, the opening of the ejection chamber air outlet 112 connected to the second channel 105 is larger than the opening of the release chamber air inlet 132 of the release chamber 13, so that the ejection channel 20 forms a negative pressure in the second channel 105 and absorbs the gas in the ejection cavity 110 of the ejection chamber 11.

[0076] like Figure 6A and Figure 6C As shown, the second channel 105 of the circulation device body 10 further includes a main air channel 1051 and an ejection air channel 1052 connected to the main air channel 1051, wherein the main air channel 1051 is connected to the slow-release cavity 130 of the slow-release chamber 13 through the slow-release chamber air inlet 132, and the ejection air channel 1052 is connected to the ejection cavity 110 through the ejection chamber air outlet 112 of the ejection chamber 11.

[0077] Preferably, the injection air channel 1052 of the second channel 105 is in a basin shape, that is, the injection air channel 1052 of the second channel 105 is an open structure toward the injection cavity 110 of the injection chamber 11, so as to allow the injection air channel 1052 of the second channel 105 to absorb the gas in the injection cavity 110 of the injection chamber 11 when the second channel 105 generates negative pressure.

[0078] The hydrogen circulation device 100 further includes at least one recirculation inlet unit 31 and at least one outlet unit 32, wherein the recirculation inlet unit 31 is disposed in the recirculation inlet passage 102 of the circulation device body 10, and the outlet unit 32 is disposed in the outlet passage 103 of the circulation device body 10. Recirculated hydrogen is drawn into the separation chamber 120 of the separation chamber 12 through the recirculation inlet unit 31, and then drawn into the second passage 105 through the first passage 104 and the ejection chamber 110 of the ejection chamber 11. The hydrogen gas in the slow-release chamber 130 of the slow-release chamber 13 is discharged outward through the outlet unit 32.

[0079] like Figure 4A and Figure 4B As shown, the circulation device body 10 includes a circulation device body 14, an upper cover plate 15, and a bottom plate 16, wherein the upper cover plate 15 is located at the upper end of the circulation device body 14, and the bottom plate 16 is located at the lower end of the circulation device body 14, and the circulation device body 14 is sealedly connected to the upper cover plate 15 and the bottom plate 16. It can be understood that the ejection chamber 11, the separation chamber 12, and the slow-release chamber 13 of the circulation device body 10 are composed of, jointly formed by, or partially formed by the circulation device body 14, the cover plate 15, and the bottom plate 16.

[0080] Preferably, in this preferred embodiment of the present invention, the ejection chamber 11 is formed by the upper cover plate 15 and the circulation device body 14; the separation chamber 12 is formed by the circulation device body 14 and the floor 16; and the slow-release chamber 13 is composed of the circulation device body 14, the upper cover plate 15, and the bottom plate 16. It is understood in the art that the ejection chamber 11, the separation chamber 12, and the slow-release chamber 13 of the circulation device body 10 are integrated into the circulation device body 14, the upper cover plate 15, and the bottom plate 16, so that the overall structure of the circulation device body 10 is simplified and miniaturized.

[0081] Preferably, in this preferred embodiment of the present invention, the ejection chamber 11 is located at the upper end of the separation chamber 12, that is, the recycled hydrogen in the separation chamber 12 is sucked upward to the ejection chamber 110 of the ejection chamber 11 by negative pressure, so as to allow the recycled hydrogen to separate from the water in the separation chamber 120 of the separation chamber 12. In other words, the recycled hydrogen is sucked into the separation chamber 120 of the separation chamber 12, and a rotating airflow with a specific rotation direction is formed in the separation chamber 12, so that the water vapor in the recycled hydrogen is separated from the hydrogen in the recycled hydrogen by rotation, thereby achieving steam-water separation. The separation chamber 12 is further provided with an inner wall 123, wherein the inner wall 123 surrounds the outer periphery of the separation chamber 120. The rotating airflow formed by the recycled hydrogen collides with the inner wall 123 of the separation chamber 12, which is conducive to the precipitation of water vapor in the recycled hydrogen. Preferably, in this preferred embodiment of the present invention, the inner wall 123 of the separation chamber 12 is implemented as an annular surface.

[0082] It is understood that the water separated from the recycled hydrogen is collected at the lower end of the separation cavity 120 of the separation chamber 12. Alternatively, in other optional embodiments of the present invention, the ejector chamber 11 is provided on the side of the separation chamber 12.

[0083] The circulation device body 10 further includes an ejection intake pipe 17, wherein the ejection intake pipe 17 is disposed in the first passage 104, and the recirculated hydrogen in the separation chamber 12 is drawn into the ejection cavity 110 of the ejection chamber 11 through the ejection intake pipe 17. The ejection intake pipe 17 includes an upper end portion 171 and a lower end portion 172 integrally extending downward from the upper end portion 171. The upper end portion 171 leads to the ejection cavity 110 of the ejection chamber 11, and the lower end portion 172 leads to the separation cavity 120 of the separation chamber 12. The ejector air intake pipe 17 is further provided with an ejector air intake channel 173 and an ejector air intake port 174 and an ejector air outlet port 175 communicating with the ejector air intake channel 173. The ejector air intake port 174 is located at the bottom end of the lower end portion 172 of the air intake pipe, and the recirculated hydrogen in the separation chamber 120 of the separation chamber 12 enters the ejector air intake channel 173 from the ejector air intake port 174. The ejector air outlet port 175 is located at the top end portion 171 of the air intake pipe, and the ejector air chamber 110 of the ejector 11 absorbs the recirculated hydrogen in the ejector air intake channel 173 from the ejector air outlet port 175. It is worth mentioning that the lower end portion 172 of the air intake pipe is located in the middle or lower middle portion of the separation chamber 120 of the separation chamber 12, so that the ejector air intake pipe 17 absorbs hydrogen in the middle or lower middle portion of the separation chamber 120 of the separation chamber 12.

[0084] It can be understood that the negative pressure formed by the hydrogen injected from the injection channel 20 in the second channel 105 is sucked into the hydrogen in the separation chamber 120 of the separation chamber 12 through the injection chamber 11 and the injection intake pipe 17, so that when the recycled hydrogen enters the separation chamber 120 of the separation chamber 12, the recycled hydrogen is sucked into the injection intake pipe 17 to form an intake vortex, which sucks the recycled hydrogen downward from the upper part of the separation chamber 120 of the separation chamber 12 circumferentially and radially, and is sucked into the injection intake channel 173 of the injection intake pipe 17 from the middle or lower part of the separation chamber 120 of the separation chamber 12 circumferentially inwardly and radially upward.

[0085] It is understood that the suction vortex formed by the recirculating hydrogen being sucked into the separation chamber 12 allows the water vapor in the recirculating hydrogen to fully collide with the inner wall 123 of the separation chamber 12, thereby facilitating the water vapor in the recirculating hydrogen to be separated from the inner wall 123 of the separation chamber 12. In addition, the suction vortex formed by the recirculating hydrogen being sucked into the separation chamber 12 allows the water vapor in the recirculating hydrogen to be separated from the hydrogen through rotation and be separated, thereby facilitating the separation of water vapor in the recirculating hydrogen.

[0086] Preferably, the separation chamber 12 has a central axis L, wherein the injection air intake pipe 17 is disposed along the central axis L of the separation chamber 12, that is, the injection air intake pipe 17 is disposed at the central axis L of the separation chamber 12. More preferably, in this preferred embodiment of the present invention, the separation cavity 120 of the separation chamber 12 is cylindrical, wherein the injection air intake pipe 17 is located at the central axis L of the separation chamber 12. It is understood that the intake vortex formed by the recirculated hydrogen being drawn into the injection air intake pipe 17 draws the recirculated hydrogen downward circumferentially and radially from the upper portion of the separation cavity 120 of the separation chamber 12, with the injection air intake pipe 17 as the center, and then draws the recirculated hydrogen circumferentially inward and radially upward from the middle or lower portion of the separation cavity 120 of the separation chamber 12 into the injection air intake passage 173 of the injection air intake pipe 17.

[0087] The recirculation intake passage 102 is provided with a first recirculation intake passage 1021, a second recirculation intake passage 1022, an external opening 1023, and an internal opening 1024. The internal opening 1024 and the external opening 1023 are connected to the first recirculation intake passage 1021, and the second recirculation intake passage 1022 is connected to the first recirculation intake passage 1021 and the ejection cavity 110 of the ejection chamber 11. Recirculated hydrogen is drawn from the first recirculation intake passage 1021 into the separation cavity 120 of the separation chamber 12; alternatively, the recirculated hydrogen is drawn from the second recirculation intake passage 1022 into the ejection cavity 110 of the ejection chamber 11.

[0088] Preferably, in this preferred embodiment of the present invention, the recirculation air intake channel 102 of the circulation device body 10 is located at the upper end of the separation chamber 12, and the internal opening 1024 of the recirculation air intake channel 102 is located on the side of the inner wall 123 of the separation chamber 12, that is, the opening direction of the internal opening 1024 of the recirculation air intake channel 102 is staggered with the introduction air intake pipe 17, so that when the recirculated hydrogen is sucked into the separation cavity 120 of the separation chamber 12, the recirculated hydrogen forms the intake vortex. In other words, the opening direction of the internal opening 1024 of the recirculation air intake channel 102 is not directly corresponding to the introduction air intake pipe 17, which is conducive to the formation of the intake vortex by the recirculated hydrogen. More preferably, one side of the internal opening 1024 of the recirculation air intake channel 102 is tangent to the inner wall 123 of the separation chamber 12.

[0089] like Figures 6A to 6C As shown, the slow-release chamber 13 further includes at least one baffle 133, wherein the baffle 133 is arranged in the slow-release cavity 130 of the slow-release chamber 13, and hydrogen or recycled hydrogen is introduced into the slow-release cavity 130 of the slow-release chamber 13, wherein the hydrogen or recycled hydrogen is blocked by the baffle 133 and impacts the surface of the baffle 133, so that water vapor in the hydrogen or the recycled hydrogen is precipitated, thereby realizing the re-separation of water vapor.

[0090] Preferably, in this preferred embodiment of the present invention, the baffles 133 are vertically arranged within the slow-release cavity 130 of the slow-release chamber 13, with at least one baffle 133 adjacent to the second channel 105. This allows the airflow ejected through the second channel 105 to impact a surface of the baffle 133, thereby utilizing the baffle separation principle to achieve separation of hydrogen and water vapor. More preferably, in this preferred embodiment of the present invention, the baffles 133 are integrally formed with or disposed on the circulation device body 14 and the upper cover 15 of the circulation device main body 10.

[0091] Alternatively, in other optional embodiments of the present invention, the number of baffles 133 is two or more, wherein the baffles 133 are spaced apart from each other within the slow-release chamber 130 of the slow-release chamber 13. This allows the hydrogen or recycled hydrogen to move within the slow-release chamber 130, while water vapor is precipitated on the baffles 133, thereby improving the vapor-water separation efficiency. It is worth noting that the liquid water separated by the slow-release chamber 13 is collected at the bottom of the slow-release chamber 130 of the slow-release chamber 13.

[0092] like Figures 4A to 6C As shown, the spatial volume of the slow-release chamber 130 of the slow-release chamber 13 is larger than the volume of the ejection chamber 110 of the ejection chamber 11 and the separation chamber 120 of the separation chamber 12, so that the hydrogen entering the slow-release chamber 130 of the slow-release chamber 13 can be buffered to stabilize the gas pressure of the slow-release chamber 130 of the slow-release chamber 13.

[0093] Specifically, when the pressure of the hydrogen injected from the ejection channel 20 fluctuates or the pressure of the recirculated hydrogen fluctuates, due to the large spatial volume of the slow-release chamber 130 of the slow-release chamber 13, the hydrogen entering the slow-release chamber 13 or the circulating hydrogen mixes with the hydrogen stored in the slow-release chamber 130, thereby buffering the pressure fluctuations of the hydrogen injected from the ejection channel 20 and / or the pressure fluctuations of the recirculated hydrogen, thereby reducing the pressure fluctuations of the hydrogen output from the gas outlet channel 103 and improving the pressure stability of the hydrogen output from the gas outlet channel 103. When the gas outlet unit 32 releases pressure too quickly and / or the gas outlet channel 103 of the circulation device body 10 leaks, the hydrogen stored in the slow-release chamber 130 of the slow-release chamber 13 can be replenished in time to avoid excessive pressure release.

[0094] like Figure 4A and Figure 4B As shown, the hydrogen circulation device 100 further includes a humidity sensor 40, a controller 50 and a control valve 60, wherein the humidity sensor 40 and the control valve 60 are communicatively connected to the controller 50, and the controller 50 controls the working state of the control valve 60 based on the humidity data detected by the humidity sensor 40, thereby adjusting the humidity of the hydrogen output by the circulation device body 10 of the hydrogen circulation device 100.

[0095] The hydrogen circulation device further includes at least one temperature and pressure sensor 33, wherein the temperature and pressure sensor 33 is arranged in the slow-release chamber 13, and the temperature and pressure sensor 33 is electrically connected to the controller 50, and the controller 50 controls the working state of the control valve 60 and the like according to the temperature and pressure sensor 50.

[0096] The humidity sensor 40 is disposed in the slow-release cavity 130 of the slow-release chamber 13 to detect the humidity of the hydrogen in the slow-release cavity 130 of the slow-release chamber 13. Preferably, in this preferred embodiment of the present invention, the humidity sensor 40 is adjacent to the gas outlet channel 103 of the circulation device body 10 to detect the humidity of the hydrogen output from the gas outlet channel 103. It is understandable that the humidity sensor 40 is adjacent to the gas outlet channel 103 of the circulation device body 10, and its detection data can be considered to be consistent with the humidity of the hydrogen output from the circulation device body 10. Therefore, controlling the humidity of the gas in the circulation device body 10 through the humidity data information detected by the humidity sensor 40 can keep the humidity of the hydrogen output from the hydrogen circulation device 100 stable.

[0097] The control valve 60 is provided in the ejection chamber body 111 of the ejection chamber 11 and is used to control the opening and closing of the second recirculation intake passage 1022 of the recirculation intake passage 102, thereby distributing the flow rate of the recirculated hydrogen and adjusting the flow direction of the recirculated hydrogen.

[0098] like Figure 7A and Figure 7B As shown, the control valve 60 has a closed position 601 and an open position 602, and the controller 50 controls the control valve 60 to switch between the closed position 601 and the open position 602. Specifically, the controller 50 presets at least one target humidity value or receives at least one set target humidity value. When the humidity sensor 40 detects that the humidity value in the ejection chamber 130 of the sustained-release chamber 13 is less than the set target humidity value, the controller 50 controls the control valve 60 to be in the open position 602, and the second recirculation intake passage 1022 of the recirculation intake passage 102 is connected to the ejection chamber 110 of the ejection chamber 11, allowing the recirculated hydrogen to directly reach the ejection chamber 110 of the ejection chamber 11 through the second recirculation intake passage 1022 of the recirculation intake passage 102. Since the water vapor concentration in the recycled hydrogen is relatively high, it is directly sucked into the slow-release cavity 130 of the slow-release chamber 13 through the ejection chamber to increase the humidity of the hydrogen in the slow-release cavity 130 of the slow-release chamber 13 .

[0099] When the humidity sensor 40 detects that the humidity value within the injection cavity 130 of the slow-release chamber 13 is greater than the set target humidity value, the controller 50 controls the control valve 60 to the closed position 601, thereby blocking the second recirculation intake passage 1022 of the recirculation intake passage 102. This allows all of the recirculated hydrogen to enter the separation cavity 120 of the separation chamber 12 through the first recirculation intake passage 1021 of the recirculation intake passage 102, and then undergo liquid-gas separation within the separation chamber 12 before being drawn into the injection cavity 110 of the injection chamber 11. It is understood that after the water vapor in the recirculated hydrogen undergoes gas-water separation in the separation chamber 12 and further gas-water separation in the slow-release chamber 13, the water vapor content of the hydrogen within the slow-release cavity 130 of the slow-release chamber 13 is reduced, thereby reducing the humidity of the hydrogen output by the hydrogen circulation device.

[0100] It is worth mentioning that in this preferred embodiment of the present invention, when the controller 50 controls the control valve 60 to be in the open position 602, the majority of the recirculated hydrogen gas directly reaches the ejection chamber 110 of the ejection chamber 11 through the second recirculation inlet passage 1022 of the recirculation inlet passage 102, while a small portion of the recirculated hydrogen gas enters the separation chamber 120 of the separation chamber 12 through the first recirculation inlet passage 1021 of the recirculation inlet passage 102. In this way, the humidity of the hydrogen gas supplied by the hydrogen circulation device 100 is automatically adjusted by the controller 50 controlling the control valve 60.

[0101] Preferably, in this preferred embodiment of the present invention, the control valve 60 is implemented as an electromagnetic bypass valve. Those skilled in the art will appreciate that the controller 50 can be implemented as another control unit in the fuel cell system, i.e., the control valve 60 of the hydrogen circulation device 100 receives a control signal from the control unit and controls the operating state of the control valve 60 according to the control signal.

[0102] like Figure 7A and Figure 7B As shown, the liquid water separated in the separation chamber 120 of the separation chamber 12 is collected at the bottom of the separation chamber 12, wherein the liquid water separated in the slow-release chamber 13 is collected at the bottom of the slow-release chamber 13, wherein a connecting channel 106 is provided between the separation chamber 120 of the separation chamber 12 and the slow-release chamber 130 of the slow-release chamber 13, wherein the connecting channel 106 connects the separation chamber 120 of the separation chamber 12 and the slow-release chamber 130 of the slow-release chamber 13 to allow the liquid water collected in the separation chamber 12 and the slow-release chamber 13 to flow.

[0103] The hydrogen circulation device 100 further includes a drain valve 70, which is disposed in the separation chamber 12 and is in communication with the separation cavity 120 of the separation chamber 12. The drain valve 70 is electrically connected to the controller 50, and the controller 50 controls the operation of the drain valve 70. When the drain valve 70 is opened, the drain valve 70 releases water stored in the separation cavity 120 of the separation chamber 12.

[0104] Those skilled in the art will appreciate that, as an option, the drain valve 70 is further installed in the slow-release chamber 13 and communicates with the slow-release cavity 130 of the slow-release chamber 13 to release the water stored in the slow-release cavity 130 of the slow-release chamber 13. Preferably, the drain valve 70 may be, but is not limited to, a solenoid valve.

[0105] like Figure 7A and Figure 7B As shown, the hydrogen circulation device 100 further includes at least one liquid level sensor 80, wherein the liquid level sensor 80 is disposed at the bottom of the separation chamber 12, that is, the liquid level sensor 80 is maintained at a lower position of the separation cavity 120 of the separation chamber 12 to detect the liquid level in the separation cavity 120 of the separation chamber 12. The liquid level sensor 80 is communicatively connected to the controller 50, and the controller 50 controls the operating state of the drain valve 70 based on the detection data of the liquid level sensor 80, thereby achieving automatic drainage of the hydrogen circulation device 100.

[0106] It is worth noting that, assuming the air pressure in the slow-release chamber 110 of the ejection chamber 11 is P1, the air pressure in the separation chamber 120 of the separation chamber 12 is P2, and the air pressure in the slow-release chamber 130 of the slow-release chamber 13 is P3, the ejection channel 20 generates an ejection effect at the second channel 105, such that the slow-release chamber pressure P3 > the separation chamber pressure P2 > the ejection chamber pressure P1. It is understood that due to the pressure differential, water collected in the separation chamber 12 will flow into the slow-release chamber 130 of the slow-release chamber 13 through the connecting channel 106.

[0107] The liquid level sensor 80 is set with at least one alarm value. When the water level in the separation chamber 12 reaches the alarm value set by the liquid level sensor 80, that is, when the water in the separation cavity 120 of the separation chamber 12 triggers the liquid level sensor 80, the controller 50 controls the drain valve 70 to open based on the detection information of the liquid level sensor 80 to release the liquid water stored in the separation cavity 120 of the separation chamber 12. When the liquid level drops, the alarm of the liquid level sensor 80 is canceled, and the controller 50 instructs the drain valve 70 to close, completing automatic drainage.

[0108] The hydrogen circulation device 100 further includes an isolation membrane 90, wherein the isolation membrane 90 is disposed in the separation chamber 12, wherein the isolation membrane 90 is located above the liquid level sensor 80 to isolate hydrogen from liquid water. It is understood that the isolation membrane 90 isolates the separation chamber 120 of the separation chamber 12, which is a liquid-gas separation chamber 1201 and a water collection chamber 1202, wherein the suction vortex caused by the negative pressure occurs in the liquid-gas separation chamber 1201 of the isolation membrane 90. The liquid water precipitated from the separation chamber 12 is collected in the water collection chamber 1202 through the isolation membrane 90. Preferably, in this preferred embodiment of the present invention, the isolation membrane 90 is disposed in the middle or lower middle position of the separation chamber 12.

[0109] It is worth noting that the isolation membrane 90 has a porous structure, through which liquid water can permeate. Furthermore, the isolation membrane 90 effectively blocks the flow of hydrogen gas within the liquid-gas separation chamber 1201, thereby preventing the inhalation vortex from disturbing the liquid surface and distorting the data collected by the liquid level sensor 80. It is worth noting that the isolation membrane 90 is implemented as a gas-water isolation membrane, which allows liquid water to permeate and effectively blocks gas vortices.

[0110] The accompanying drawings of the present invention Figure 8 Another alternative embodiment of the hydrogen circulation device 100 is shown. Unlike the first preferred embodiment described above, in this preferred embodiment of the present invention, the recycled hydrogen is pumped into the separation chamber 12 of the hydrogen circulation device 100. That is, the recycled hydrogen has a certain gas pressure before entering the separation chamber 12, such that the separation chamber pressure P2 > the ejection chamber pressure P > the release chamber pressure P3. Unlike the preferred embodiment described above, the water drain valve 70 is located in the release chamber 13 and is connected to the release chamber 130 of the release chamber 13 to release water stored in the release chamber 130 of the release chamber 13.

[0111] The liquid level sensor 80 is disposed at the bottom of the slow-release chamber 13, i.e., the liquid level sensor 80 is maintained at a lower position of the slow-release cavity 130 of the slow-release chamber 13, to detect the liquid level in the slow-release cavity 130 of the slow-release chamber 13. The liquid level sensor 80 is communicatively connected to the controller 50, where the controller 50 controls the operating state of the drain valve 70 based on the detection data of the liquid level sensor 80, thereby achieving automatic drainage of the hydrogen circulation device 100.

[0112] The accompanying drawings of the present invention Figure 9As shown, another optional embodiment of a hydrogen circulation device 100 of the first preferred embodiment of the present invention is described below. Unlike the preferred embodiment described above, the number of the ejection channels 20 of the hydrogen circulation device 100 is one or more. For example, in this preferred embodiment of the present invention, the number of the ejection channels 20 is two (i.e., 20a and 20b), wherein the ejection channels 20a and 20b can operate simultaneously or independently to meet different hydrogen supply flow requirements.

[0113] According to another aspect of the present invention, the present invention further provides a circulation method of a hydrogen circulation device, wherein the circulation method comprises the steps of:

[0114] (a) introducing high-pressure hydrogen into a second channel 105 of a circulation device body 10, introducing the hydrogen into a slow-release chamber 13 through the second channel 105, and generating a negative pressure in the second channel 105; and

[0115] (b) Recirculating hydrogen is sucked into a separation chamber from a recirculating air inlet passage 102 in a negative pressure manner, and an intake vortex is formed to suck the recirculating hydrogen downward from the upper part of the separation chamber 12 circumferentially and radially downward, and is sucked into a first passage 104 from the separation chamber 12 circumferentially inward and radially upward. The recirculating hydrogen is sucked into the second passage 105 through an ejector chamber 11, and then passed into the release chamber 13 through the second passage 105 to mix with the hydrogen in the release chamber 13.

[0116] In the above-mentioned circulation method of the present invention, the step is further included: using at least one baffle 133 of the slow-release chamber 13 to block the hydrogen gas flow and the recycled hydrogen gas flow entering the second channel 105, and the gas flow ejected from the second channel 105 collides with the baffle 133 to precipitate water vapor in the gas flow.

[0117] In the above-mentioned circulation method of the present invention, the step of detecting the humidity in the slow-release chamber 13 and controlling the working state of a control valve 60 according to the set humidity value is further included. When the humidity value detected by the humidity sensor 40 is less than the set target humidity value, the control valve 60 is controlled by a controller 50 to be in an open position 602. The control valve 60 connects a second recirculation intake passage 1022 of the recirculation intake passage 102 to the ejection chamber 110 of the ejection chamber 11 to allow the recirculated hydrogen to pass through the recirculation intake passage. The second recirculation air intake duct 1022 of 102 directly reaches the injection cavity of the injection chamber 11; when the humidity value detected by the humidity sensor 40 is greater than the set target humidity value, the controller 50 controls the control valve 60 to be in a closed position 601, and the second recirculation air intake duct 1022 of the recirculation air intake channel 102 is blocked by the control valve 60, so that all the recirculated hydrogen enters the separation cavity 120 of the separation chamber 12 through a first recirculation air intake duct 1021 of the recirculation air intake channel 102.

[0118] Referring to the accompanying drawings of the present invention Figure 10 As shown, a fuel cell hydrogen supply system according to another aspect of the present invention is explained in the following description. The fuel cell hydrogen supply system is configured to provide hydrogen to a fuel cell stack 1000. The fuel cell hydrogen supply system includes a hydrogen circulation device 100, a hydrogen supply device 200, and an exhaust device 300, wherein the hydrogen circulation device is the same as the first preferred embodiment described above. The hydrogen supply device 200 is connected to an ejection channel 20 of the hydrogen circulation device 100, an outlet unit 32 of the hydrogen circulation device 100 is connected to the air inlet end of the fuel cell stack, and the air outlet end of the fuel cell stack is connected to a recirculating air inlet unit 31 of the hydrogen circulation device. In other words, the hydrogen supply device 200 introduces hydrogen into a circulation device body 10 through the ejector channel 20, wherein the hydrogen exhausted after the fuel cell reaction is introduced into the circulation device 10 through the recirculation inlet unit 31, wherein the local hydrogen introduced by the hydrogen supply device 200 and the recirculated hydrogen remaining after the fuel cell reaction are mixed within the circulation device body 10 of the hydrogen circulation device 100. The moderated hydrogen is introduced from the circulation device body 10 into the fuel cell through the outlet unit 32 for use by the fuel cell.

[0119] The exhaust device 300 is connected to the fuel cell stack and the hydrogen circulation device 100 , wherein water generated by the fuel cell stack and the water generated by the hydrogen circulation device 100 are discharged to the external environment through the exhaust device 300 .

[0120] The fuel cell hydrogen supply system further includes at least one pressure regulating valve 400 and at least one pressure relief valve 500, wherein the pressure regulating valve 400 is disposed between the hydrogen supply device 200 and the hydrogen circulation device 100 and is used to adjust the pressure of the hydrogen supplied from the hydrogen supply device 200 to the hydrogen circulation device 100. The pressure relief valve 500 is disposed between the fuel cell stack and the exhaust device 300 and is used to control the discharge of waste from the fuel cell stack through the exhaust device 300 and to adjust the fuel cell stack pressure. Preferably, the pressure relief valve 500 may be, but is not limited to, a solenoid valve.

[0121] Referring to the accompanying drawings of the present invention Figure 11 As shown, a fuel cell hydrogen supply system according to another aspect of the present invention is explained in the following description. Unlike the above preferred embodiment, the fuel cell hydrogen supply system further includes at least one circulation pump 600, wherein the circulation pump 600 is arranged between the hydrogen circulation device 100 and the exhaust end of the fuel cell stack, and the circulation pump 600 is connected to the recirculation air intake unit 31 of the hydrogen circulation device 100 and the exhaust end of the fuel cell stack. The circulation pump 600 increases the pressure of the circulating hydrogen entering the circulation device body 10 to improve the fuel cell power.

[0122] It is worth mentioning that, in this preferred embodiment of the present invention, the water drain valve 70 and the liquid level sensor 80 of the hydrogen circulation device 100 are disposed in the slow-release chamber 13 .

[0123] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended to be illustrative only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A hydrogen circulation device, adapted to mix hydrogen and recycled hydrogen, the hydrogen circulation device comprising: a circulation device body, the circulation device body comprising an ejection chamber, a separation chamber, and a slow-release chamber, the circulation device body further comprising an air inlet channel, at least one recirculation air inlet channel, and an air outlet channel, wherein the air inlet channel is formed in the ejection chamber, the recirculation air inlet channel is formed in the separation chamber, and the air outlet channel is formed in the slow-release chamber; and An ejection channel, wherein the ejection channel is arranged in the intake channel of the circulation device body, and the circulation device body is further provided with a first channel and a second channel, the first channel connects the separation chamber and the ejection chamber, and the second channel connects the ejection chamber and the slow-release chamber, wherein the ejection channel introduces hydrogen to the second channel, and the hydrogen passes through the second channel to the slow-release chamber, and the second channel forms a negative pressure through the hydrogen, so as to inhale the recirculated hydrogen from the recirculation intake channel to the slow-release chamber by means of negative pressure, wherein the recirculation intake channel is provided with a first recirculation intake channel, a second recirculation intake channel, an external opening and an internal opening, wherein the internal opening and the external opening are connected to the first recirculation intake channel, and the second recirculation intake channel connects the first recirculation intake channel to the ejection chamber.

2. The hydrogen circulation device according to claim 1, wherein the ejection chamber further comprises an ejection chamber body, an ejection cavity formed in the ejection chamber body, and an ejection chamber gas outlet, wherein the ejection chamber gas outlet connects the ejection cavity of the ejection chamber to the second channel, the air inlet channel is positively corresponding to the ejection chamber gas outlet of the ejection chamber, wherein the ejection channel extends from the air inlet channel to the ejection chamber gas outlet of the ejection chamber.

3. The hydrogen circulation device according to claim 2, wherein the second channel of the circulation device body further includes a main air channel and an ejector air channel connected to the main air channel, and the ejector air channel of the second channel is basin-shaped.

4. The hydrogen circulation device according to claim 2 further comprises at least one recirculation air inlet unit and at least one air outlet unit, wherein the recirculation air inlet unit is arranged in the recirculation air inlet passage of the circulation device body, and the air outlet unit is arranged in the air outlet passage of the circulation device body.

5. The hydrogen circulation device according to claim 1, wherein the circulation device body includes a circulation device body, an upper cover plate and a bottom plate, wherein the upper cover plate is located at the upper end of the circulation device body, the bottom plate is located at the lower end of the circulation device body, and the circulation device body is sealedly connected to the upper cover plate and the bottom plate, and the ejection chamber, the separation chamber and the slow-release chamber of the circulation device body are composed of, jointly formed by or are part of the structure of the circulation device body, the cover plate and the bottom plate.

6. The hydrogen circulation device according to any one of claims 1 to 5, further comprising an ejector intake pipe, wherein the ejector intake pipe is arranged in the first channel, and the recirculated hydrogen in the separation chamber is sucked into the ejector chamber through the ejector intake pipe.

7. The hydrogen circulation device according to claim 6, wherein the ejection intake pipe includes an upper end portion of the intake pipe and a lower end portion of the intake pipe integrally extending downward from the upper end portion of the intake pipe, wherein the upper end portion of the intake pipe leads to the ejection chamber, and the lower end portion of the intake pipe leads to the separation chamber, and when the recycled hydrogen enters the separation chamber, the recycled hydrogen is sucked into the ejection intake pipe to form an intake vortex, so as to circumferentially and radially suck the recycled hydrogen downward from the upper part of the separation chamber, and is sucked into the ejection intake pipe from the separation chamber circumferentially inwardly and radially upward.

8. The hydrogen circulation device according to claim 7, wherein the separation chamber has a central axis, wherein the injection air intake pipe is arranged along the central axis of the separation chamber, the separation chamber is cylindrical, and the intake vortex formed by the recycled hydrogen being sucked into the injection air intake pipe is centered on the injection air intake pipe.

9. The hydrogen circulation device according to claim 7, wherein the recirculation intake channel is located at the upper part of the separation chamber, and the internal opening of the recirculation intake channel is located on the side of the inner wall of the separation chamber, and the opening direction of the internal opening of the recirculation intake channel is staggered with the injection intake pipe. 10 . The hydrogen circulation device according to claim 7 , wherein the slow-release chamber further comprises at least one baffle, the baffle being vertically arranged in the slow-release chamber, and at least one baffle being adjacent to the second channel.

11. The hydrogen circulation device according to claim 10, wherein the spatial volume of the slow-release chamber is larger than the volume of the ejection chamber and the separation chamber, so that the hydrogen entering the slow-release chamber can be buffered to stabilize the gas pressure of the slow-release chamber.

12. The hydrogen circulation device according to claim 7 further comprises a humidity sensor, a controller and a control valve, wherein the humidity sensor and the control valve are communicatively connected to the controller, and the controller controls the control valve based on humidity data detected by the humidity sensor, wherein the control valve is located in the second recirculation intake duct, and the controller controls the working state of the control valve based on the humidity sensor, thereby controlling the opening and closing of the second recirculation intake duct.

13. The hydrogen circulation device according to claim 12, wherein the humidity sensor is arranged in the slow-release chamber, and the humidity sensor is adjacent to the air outlet passage, and the control valve has a closed position and an open position, when the control valve is in the open position, the second recirculation intake passage of the recirculation intake passage is connected to the ejection chamber to allow the recirculated hydrogen to reach the ejection chamber through the second recirculation intake passage of the recirculation intake passage; when the control valve is in the closed position, the second recirculation intake passage of the recirculation intake passage is blocked, so that all the recirculated hydrogen enters the separation chamber through the first recirculation intake passage of the recirculation intake passage.

14. The hydrogen circulation device according to claim 12, wherein a communication channel is provided between the separation chamber and the slow-release chamber, wherein the communication channel connects the separation chamber and the slow-release chamber to allow the liquid water collected in the separation chamber and the slow-release chamber to flow.

15. The hydrogen circulation device according to claim 14 further comprises a drain valve and at least one liquid level sensor, wherein the drain valve and the liquid level sensor are electrically connected to the controller, the liquid level sensor is arranged at the bottom of the separation chamber, and the drain valve is conductively connected to the separation chamber, wherein the controller controls the working state of the drain valve based on the detection data of the liquid level sensor so that the hydrogen circulation device automatically drains water.

16. The hydrogen circulation device according to claim 14 further comprises a drain valve and at least one liquid level sensor, wherein the drain valve and the liquid level sensor are electrically connected to the controller, the liquid level sensor is arranged at the bottom of the slow-release chamber, and the drain valve is conductively connected to the slow-release chamber, wherein the controller controls the working state of the drain valve based on the detection data of the liquid level sensor so that the hydrogen circulation device automatically drains water.

17. The hydrogen circulation device according to claim 12 further comprises an isolation membrane, wherein the isolation membrane is arranged in the separation chamber, the isolation membrane separates the separation chamber into a liquid-gas separation chamber and a water collection chamber, the liquid water precipitated from the separation chamber is collected in the water collection chamber through the isolation membrane, the isolation membrane is arranged in the middle or lower middle position of the separation chamber, wherein the isolation membrane is a porous structure, allowing liquid water to penetrate through.

18. A hydrogen circulation method, based on the hydrogen circulation device according to any one of claims 1 to 5, wherein the circulation method comprises the steps of: (a) introducing high-pressure hydrogen into a second channel of a circulation device body, introducing the hydrogen into a slow-release chamber through the second channel, and generating negative pressure in the second channel; and (b) Recirculating hydrogen is sucked into a separation chamber from a recirculation intake passage in a negative pressure manner, and an intake vortex is formed in the separation chamber, so that the recirculating hydrogen is sucked downward from the upper part of the separation chamber circumferentially and radially downward, and is sucked from the separation chamber into a first passage circumferentially inwardly and radially upward, the recirculating hydrogen is sucked into the second passage through an ejector chamber, and then is passed into the release chamber through the second passage to be mixed with the hydrogen in the release chamber.

19. The circulation method according to claim 18, further comprising the step of blocking the hydrogen gas flow and the recycled hydrogen gas flow entering the second channel by at least one baffle of the slow-release chamber, and the gas flow ejected from the second channel collides with the baffle to precipitate water vapor in the gas flow.

20. The circulation method according to claim 18 further includes the steps of: detecting the humidity in the slow-release chamber, and controlling the working state of a control valve according to a set humidity value; when the detected humidity value is less than the set target humidity value, the control valve is controlled by a controller to be in an open position, and the control valve connects a second recirculation intake duct of the recirculation intake channel to the ejection chamber to allow the recirculated hydrogen to directly reach the ejection chamber through the second recirculation intake duct of the recirculation intake channel; when the detected humidity value is greater than the set target humidity value, the controller controls the control valve to be in a closed position, and the second recirculation intake duct of the recirculation intake channel is blocked by the control valve, so that all the recirculated hydrogen enters the separation chamber through a first recirculation intake duct of the recirculation intake channel.

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