CN114388845A

CN114388845A - Hydrogen circulation device and hydrogen circulation method

Info

Publication number: CN114388845A
Application number: CN202011124399.6A
Authority: CN
Inventors: 傅红日; 陶喜军; 唐生态; 查少平; 蒋政通; 李骁
Original assignee: Wuhan Troowin Power System Technology Co ltd
Current assignee: Wuhan Troowin Power System Technology Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2022-04-22

Abstract

The invention provides a hydrogen circulating device and a hydrogen circulating method, wherein the hydrogen circulating device comprises a circulating device body and an injection passage, the circulating device body comprises an injection chamber, a separation chamber and a slow release chamber, the circulating device body is further provided with an air inlet passage, at least one recirculation air inlet passage and an air outlet passage, the injection passage is arranged in the air inlet passage of the circulating device body, the circulating device body is further provided with a first passage and a second passage, hydrogen is introduced into the second passage through the injection passage, the hydrogen is introduced into the slow release chamber through the second passage, and the second passage forms negative pressure through the hydrogen so as to suck the recirculation hydrogen into the slow release chamber from the recirculation air inlet passage in a negative pressure mode.

Description

Hydrogen circulation device and hydrogen circulation method

Technical Field

The invention relates to the field of fuel cells, in particular to a hydrogen circulating device and a hydrogen circulating method.

Background

The hydrogen circulation system is an important unit of the fuel cell power module and is used for conveying hydrogen to the fuel cell stack and purifying and recycling hydrogen tail gas. In a fuel cell hydrogen supply system, hydrogen enters a fuel cell stack to undergo a chemical reaction to generate electric energy, and a mixture of hydrogen, water vapor and liquid water is discharged after the reaction. This mixture, if discharged directly into the air, would result in a significant waste of hydrogen and constitute a safety hazard, and must therefore be recycled. Before recycling, the mixed gas needs to be subjected to steam-water separation treatment to separate liquid water in the hydrogen. Because liquid water entering the stack may cause the stack to flood, reducing the efficiency of the fuel cell system.

In the prior art, a fuel cell hydrogen supply system processes mixed gas through parts such as a steam-water separator, a circulating pump, a slow release device and the like, and then the mixed gas enters an electric pile. In comparison, the scheme has the advantages of complex structure, low integration level and high cost.

Fig. 1 shows an embodiment of a prior art hydrogen supply system for a fuel cell, wherein the hydrogen supply system for a fuel cell comprises 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 disposed between the hydrogen supply unit 10p and a stack 200p, and the slow release device 20p connects the hydrogen supply unit 10p and the stack 200 p. The gas-liquid separator 40p is connected to the hydrogen output end of the cell stack 200p and connected to the circulation pump 30p, wherein the circulation pump 30 passes the hydrogen discharged from the cell stack through the gas-liquid separator 40 and then into the slow release device 20p, so that the hydrogen reacted in the cell stack 200p is mixed with the hydrogen in the hydrogen supply unit 10p and then introduced into the reaction cell stack.

It can be understood that the hydrogen supply system of the prior art fuel cell is composed of a plurality of discrete and interconnected components, and such poor integration occupies a large space, thereby increasing the volume of the whole fuel cell and being disadvantageous to the miniaturization of the fuel cell. In addition, the prior art fuel cell hydrogen supply system has at least one of the following defects: due to the dispersion of the system structure, the temperature, the pressure and the humidity of the hydrogen supply system are difficult to accurately monitor; the gas-liquid separation of hydrogen in the hydrogen supply system of the fuel cell can affect the humidity adjustment of the hydrogen in the hydrogen supply system, so that the humidity of the hydrogen in the hydrogen supply system is difficult to adjust in time according to the needs. In addition, the hydrogen supply system of the fuel cell in the prior art usually needs a hydrogen circulating pump to provide power for the circulation of hydrogen, and the hydrogen circulating pump has large volume and large power consumption, and is not beneficial to the improvement of the power density of the fuel cell system.

Disclosure of Invention

One of the main advantages of the present invention is to provide a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device uses an injection effect to suck hydrogen discharged from a fuel cell stack, so as to recycle the hydrogen, which is beneficial to improving the hydrogen utilization rate.

Another advantage of the present invention is to provide a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device separates water from circulated hydrogen while circularly utilizing hydrogen, i.e., the hydrogen circulation and the water separation of the fuel cell hydrogen supply system are integrated in the hydrogen circulation device, which is beneficial to the miniaturization of the fuel cell hydrogen supply system.

Another advantage of the present invention is to provide a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device buffers pressure shock of hydrogen while recycling hydrogen to stabilize the pressure of supplied hydrogen, that is, when the pressure of hydrogen fluctuates, the hydrogen circulation device buffers the pressure of hydrogen to stabilize the pressure of supplied hydrogen; when the pressure of the hydrogen is released too fast, the gas in the hydrogen circulating device can supplement the hydrogen in time, so that the pressure release is avoided too fast.

Another advantage of the present invention is to provide a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device detects the humidity of hydrogen and automatically adjusts the humidity of hydrogen according to the detected humidity of hydrogen, which is beneficial to maintaining the stability of the humidity of hydrogen in the hydrogen supply system of the fuel cell.

Another advantage of the present invention is to provide 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 from the hydrogen circulation device according to the set target humidity value, so as to maintain the hydrogen humidity of the fuel cell hydrogen supply system stable.

Another advantage of the present invention is to provide a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device monitors the temperature, pressure and humidity of hydrogen supplied by a fuel cell, which is beneficial for maintaining the stability of the quality of supplied hydrogen, thereby maintaining the stable operation of the hydrogen supply system of the fuel cell.

Another advantage of the present invention is to provide a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device performs a liquid level alarm and an automatic discharge for separated water, which is beneficial to improving the operation stability of the fuel cell hydrogen supply system.

Another advantage of the present invention is to provide a hydrogen circulation device and a hydrogen circulation method, in which the hydrogen circulation device is highly integrated, and can solve the problems of difficulty in integration, high cost, and the like caused by the integration of a gas supply system.

Another advantage of the present invention is to provide a hydrogen circulation apparatus and a hydrogen circulation method, in which the hydrogen circulation apparatus can effectively alleviate the fluctuation of the pressure of the supplied gas, thereby facilitating the stabilization of the pressure of the supplied gas.

Another advantage of the present invention is to provide a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device uses an isolation film to isolate gas from liquid, thereby preventing disturbance of gas flow on liquid level from affecting information collection of the liquid level sensor, and facilitating accuracy of information collection.

Another advantage of the present invention is to provide a hydrogen circulation device and a hydrogen circulation method, wherein the hydrogen circulation device sucks recycled hydrogen by negative pressure, which is beneficial to simplifying the structure of the fuel cell hydrogen supply system and to miniaturizing the fuel cell hydrogen supply system.

Additional advantages and features of the invention will be set forth in the detailed description which follows and in part will be apparent from the description, or may be learned by practice of the invention as set forth hereinafter.

In accordance with one aspect of the present invention, the foregoing and other objects and advantages are achieved by a hydrogen circulation device adapted to mix a hydrogen gas and a recycle hydrogen gas, comprising:

the circulating device body comprises an injection chamber, a separation chamber and a slow release chamber, and is further provided with 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 injection 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

the injection passage is arranged in the air inlet passage of the circulating device body, the circulating device body is further provided with a first passage and a second passage, the first passage is communicated with the separation chamber and the injection chamber, the second passage is communicated with the injection chamber and the slow release chamber, hydrogen is introduced into the second passage through the injection passage, the hydrogen flows to the slow release chamber through the second passage, and the second passage forms negative pressure through the hydrogen so as to suck the recirculated hydrogen into the slow release chamber through the recirculation air inlet passage in a negative pressure mode.

According to an embodiment of the present invention, the injection chamber further includes an injection chamber body, an injection cavity formed in the injection chamber body, and an injection chamber air outlet, wherein the injection cavity of the injection chamber is communicated with the injection chamber air outlet of the injection chamber through the injection chamber air outlet in the second passage, the air inlet passage corresponds to the injection chamber air outlet of the injection chamber in a forward direction, and the injection passage extends from the air inlet passage to the injection chamber air outlet of the injection chamber.

According to an embodiment of the present invention, the second passage of the circulation device body further includes a main air passage and a bleed air passage communicating with the main air passage, and the bleed air passage of the second passage has a basin shape.

According to an embodiment of the present invention, the recycling device further comprises at least one recycling inlet unit and at least one outlet unit, wherein the recycling inlet unit is disposed in the recycling inlet channel of the recycling device body, and the outlet unit is disposed in the outlet channel of the recycling device body.

According to an embodiment of the present invention, the circulation device main body includes a circulation device body, an upper cover plate, and a bottom plate, wherein the upper cover plate is located at an upper end of the circulation device body, the bottom plate is located at a lower end of the circulation device body, and the circulation device body is hermetically connected to the upper cover plate and the bottom plate, and the injection chamber, the separation chamber, and the slow release chamber of the circulation device main body are formed by, together with, or as part of the structure of the circulation device body, the cover plate, and the bottom plate.

According to an embodiment of the present invention, the hydrogen separator further comprises an ejector gas inlet pipe, wherein the ejector gas inlet pipe is disposed in the first passage, and the recirculated hydrogen gas in the separation chamber is sucked into the ejector chamber through the ejector gas inlet pipe.

According to an embodiment of the invention, the ejector gas inlet pipe comprises an upper end of the gas inlet pipe and a lower end of the gas inlet pipe integrally extending downwards from the upper end of the gas inlet pipe, wherein the upper end of the gas inlet pipe is opened to the ejector chamber, the lower end of the gas inlet pipe is opened to the separation chamber, when the recirculated hydrogen enters the separation chamber, the recirculated hydrogen is sucked into the ejector gas inlet pipe to form a suction vortex, so that the recirculated hydrogen is sucked downwards from the upper part of the separation chamber in a circumferential direction and a radial direction, and is sucked into the ejector gas inlet pipe from the separation chamber in a circumferential direction inwards and a radial direction upwards.

According to an embodiment of the present invention, the separation chamber has a central axis, wherein the ejector gas inlet pipe is disposed along the central axis of the separation chamber, the separation chamber has a cylindrical shape, and the suction vortex formed by sucking the recirculated hydrogen gas into the ejector gas inlet pipe is centered on the ejector gas inlet pipe.

According to one embodiment of the invention, the recirculation air inlet channel is located at the upper part of the separation chamber, the internal opening of the recirculation air inlet channel is located at the side edge of the inner wall of the separation chamber, and the opening direction of the internal opening of the recirculation air inlet channel is staggered with the injection air inlet pipe.

According to an embodiment of the present invention, the slow release chamber further comprises at least one baffle, the baffle is vertically arranged in the slow release chamber, and at least one baffle is adjacent to the second channel.

According to one embodiment of the invention, the spatial volume of the slow release chamber is larger than the volumes of the injection chamber and the separation chamber, so that hydrogen entering the slow release chamber is buffered to stabilize the gas pressure of the slow release chamber.

According to an embodiment of the present invention, the recirculation intake passage 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 communicated with the first recirculation intake channel, and the second recirculation intake channel is communicated with the first recirculation intake channel in the injection chamber.

According to an embodiment of the present invention, the air conditioner 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, the control valve is controlled by the controller based on humidity data detected by the humidity sensor, the control valve is located in the second recirculation air inlet, and the controller controls an operating state of the control valve based on the humidity sensor, so as to control on/off of the second recirculation air inlet.

According to an embodiment of the present invention, the humidity sensor is disposed in the slow release chamber, and the humidity sensor is adjacent to the gas outlet channel, the control valve has a closed position and an open position, when the control valve is in the open position, the second recirculation inlet of the recirculation inlet channel is communicated with the injection chamber to allow the recirculated hydrogen to reach the injection chamber through the second recirculation inlet of the recirculation inlet channel; when the control valve is in the closed position, the second recirculation inlet of the recirculation inlet passage is blocked such that all of the recirculated hydrogen enters the separation chamber through the first recirculation inlet of the recirculation inlet passage.

According to one embodiment of the invention, a communication channel is provided between the separation chamber and the sustained release chamber, wherein the communication channel communicates the separation chamber and the sustained release chamber to allow the flow of liquid water collected in the separation chamber and the sustained release chamber.

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

According to an embodiment of the present invention, the hydrogen circulation device further comprises a water drain valve and at least one liquid level sensor, wherein the water drain valve and the liquid level sensor are electrically connected to the controller, the liquid level sensor is disposed at the bottom of the slow release chamber, the water drain valve is conductively connected to the slow release chamber, and the controller controls the operation state of the water drain valve based on the detection data of the liquid level sensor, so that the hydrogen circulation device automatically drains water.

According to an embodiment of the present invention, the separator further comprises a separation membrane, wherein the separation membrane is disposed in the separation chamber, the separation membrane separates the separation chamber into a liquid-gas separation chamber and a water collection chamber, the liquid water separated out from the separation chamber is collected in the water collection chamber through the separation membrane, and the separation membrane is disposed in the middle or lower position of the separation chamber, wherein the separation membrane is porous and allows liquid water to permeate through.

According to another aspect of the present invention, there is further provided a recycling method of a hydrogen recycling apparatus, wherein the recycling method includes the steps of:

(a) introducing hydrogen at high pressure into a second channel of a circulating device main body, introducing the hydrogen into a slow release chamber through the second channel, and generating negative pressure in the second channel; and

(b) sucking the recirculated hydrogen from a recirculation gas inlet channel to a separation chamber in a negative pressure manner, forming a suction vortex in the separation chamber, sucking the recirculated hydrogen from the upper part of the separation chamber downwards in a circumferential direction and a radial direction, sucking the recirculated hydrogen from the separation chamber into a first channel from the separation chamber inwards in the circumferential direction and upwards in the radial direction, sucking the recirculated hydrogen into a second channel from an injection chamber, and then leading the recirculated hydrogen into the slow release chamber through the second channel to be mixed with the hydrogen in the slow release chamber.

According to an embodiment of the invention, further comprising the step of: the at least one baffle of the slow release chamber blocks the hydrogen airflow and the recirculated hydrogen airflow introduced into the second channel, and the airflow ejected from the second channel impacts the baffle to separate out water vapor in the airflow.

According to an embodiment of the invention, further comprising the step of: detecting the humidity in the slow release chamber, controlling the working state of a control valve according to a set humidity value, and controlling the control valve to be in an open position by a controller when the detected humidity value is smaller than the set target humidity value, wherein the control valve conducts a second recirculation air inlet channel of the recirculation air inlet channel to the injection chamber so as to allow the recirculation hydrogen to directly reach the injection chamber through the second recirculation air inlet channel of the recirculation air inlet channel; when the detected humidity value is larger than the set target humidity value, the controller controls the control valve to be in a closed position, the second recirculation air inlet channel of the recirculation air inlet channel is blocked by the control valve, and therefore all the recirculation hydrogen enters the separation chamber through a first recirculation air inlet channel of the recirculation air inlet channel.

According to another aspect of the present invention, there is further provided a fuel cell hydrogen supply system adapted for a stack, comprising:

a hydrogen circulation device, said hydrogen circulation device comprising:

the circulating device body is further provided with a first channel and a second channel, the first channel is communicated with the separation chamber and the injection chamber, the second channel is communicated with the injection chamber and the slow release chamber, hydrogen is introduced into the second channel through the injection channel, the hydrogen passes through the second channel to the slow release chamber, the second channel forms negative pressure through the hydrogen, and the recirculated hydrogen is sucked from the recirculation gas inlet channel to the slow release chamber in a negative pressure mode;

a hydrogen supply device, wherein the hydrogen circulation device is arranged between the galvanic pile and the hydrogen supply device; and

an exhaust device is conductively coupled to the stack.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the claims.

Drawings

Fig. 1 is a schematic diagram of a prior art fuel cell hydrogen supply system.

FIG. 2 is a schematic view of a hydrogen circulation apparatus according to a first preferred embodiment of the present invention.

Fig. 3 is a front view of the hydrogen circulation device according to the above-described first preferred embodiment of the present invention.

Fig. 4A and 4B are exploded views of the hydrogen circulation device according to the first preferred embodiment of the present invention.

Fig. 5 is a sectional view of the hydrogen circulation device according to the above-described first preferred embodiment of the present invention, showing the flow pattern of the hydrogen gas flow in the hydrogen circulation device.

Fig. 6A is a sectional view of the hydrogen circulation device according to the above-described first preferred embodiment of the present invention in one direction.

Fig. 6B is a sectional view of the hydrogen circulation device according to the above-described first preferred embodiment of the present invention, taken in another direction.

Fig. 6C is a sectional view of the hydrogen circulation device according to the above-described first preferred embodiment of the present invention, taken in another direction.

Fig. 7A is a sectional view of the hydrogen circulation device according to the above-described first preferred embodiment of the present invention, which shows an operation state of the hydrogen circulation device when the humidity of the hydrogen circulation device is lower than a set value.

Fig. 7B is a sectional view of the hydrogen circulation device according to the above-described first preferred embodiment of the present invention, which shows the operation state of the hydrogen circulation device when the humidity of the hydrogen circulation device is higher than a set value.

Fig. 8 is a sectional view of another alternative embodiment of the hydrogen circulation device according to the above-described first preferred embodiment of the present invention.

FIG. 9 is a schematic view of a hydrogen circulation device according to another alternative embodiment of the first preferred embodiment of the present invention.

Fig. 10 is a schematic diagram of a hydrogen supply system of a fuel cell according to the above preferred embodiment of the present invention.

Fig. 11 is a schematic diagram of another alternative implementation of a fuel cell hydrogen supply system according to the above preferred embodiment of the invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 2 to 7B of the drawings accompanying the present specification, a hydrogen circulation device 100 according to a first preferred embodiment of the present invention will be explained in the following description. The hydrogen circulation device comprises a circulation device body 10 and at least one injection channel 20, wherein the circulation device body 10 comprises at least one gas inlet channel 101, at least one recirculation gas inlet channel 102 and at least one gas outlet channel 103, the injection channel 20 is arranged in the circulation device body 10 from the gas inlet channel 101, hydrogen is introduced into the circulation device body 10 through the injection channel 20, and the recirculated hydrogen is introduced into the circulation device body 10 through the recirculation gas inlet channel 102. The hydrogen and the recycled hydrogen are mixed in the circulation device body 10 and then are led out through the outlet channel 103 of the circulation device body 10. It should be noted that, in the preferred embodiment of the present invention, the injection passage may be, but is not limited to, an injection pipe, that is, the injection passage is formed by a tubular extension or the injection passage is the tubular extension.

The circulating device main body 10 comprises an injection chamber 11, a separation chamber 12 and a slow release chamber 13, wherein the injection chamber 11 is separated from and communicated with the separator 12, the injection chamber 11 is separated from and communicated with the slow release chamber 13, and the separation chamber 12 is separated from the slow release chamber 13. The air inlet passage 101 of the circulation device body 10 is formed in the ejector chamber 11, the recirculation air inlet passage 102 is formed in the separation chamber 12, and the air outlet passage 103 is formed in the slow release chamber 13. The hydrogen is introduced into the injection chamber 11 from the gas inlet passage 101 through the injection passage 20, and reaches the slow release chamber 13 through the injection chamber 11 under the action of gas pressure. The recirculated hydrogen is introduced into the separation chamber 12 through the recirculated gas inlet passage 102, wherein the recirculated hydrogen in the separation chamber 12 is sucked into the ejector chamber 11, and then introduced into the slow release chamber 13 through the ejector chamber 11 for gas mixing.

In detail, a first passage 104 is provided between the injection chamber 11 and the separation chamber 12, wherein the first passage 104 communicates the injection chamber 11 and the separation chamber 12, and the recirculated hydrogen gas in the separation chamber 12 is sucked into the injection chamber 11 through the first passage 104. A second passage 105 is arranged between the injection chamber 11 and the slow release chamber 13, wherein the second passage 105 is communicated with the injection chamber 11 and the slow release chamber 13, and the injection passage 20 is used for introducing hydrogen into the second passage 105 of the circulating device main body 10 and into the slow release chamber 13 through the second passage 105. When the second passage 105 is filled with hydrogen at high pressure, the injection passage 20 forms negative pressure in the second passage 105 based on an injection effect, so that the recirculated hydrogen in the separation chamber 12 is sucked into the injection chamber 11 and then is introduced into the slow release chamber 13 through the injection chamber 11.

As shown in fig. 6A, the injection chamber 11 further includes an injection chamber main body 111, an injection cavity 110 formed in the injection chamber main body 111, and an injection chamber air outlet 112, wherein the injection cavity 110 of the injection chamber 11 is communicated with the injection cavity 112 of the injection chamber 11 through the second passage 105. The air inlet passage 101 corresponds to the injection chamber air outlet 112 of the injection chamber 11 in the forward direction, wherein the injection passage 20 extends from the air inlet passage 101 to the injection chamber air outlet 112 of the injection chamber 11, so as to allow the injection passage 20 to form a negative pressure in the second passage 105 based on an injection effect.

The injector 20 is mounted to the injector chamber 11 from the inlet passage 101, wherein the injector 20 has an injector passage 201 and an injector port 202 in communication with the injector passage 201, wherein the flow of hydrogen gas passes from the injector port 202 to the second passage 105 through the injector passage 201 of the injector 20. It should be noted that, in the preferred embodiment of the present invention, the injector passage 20 extends from the air inlet passage 101 to the second passage 105, that is, the injector port 202 of the injector 20 is located in the second passage 105, so that the injector port 202 of the injector passage 20 forms a negative pressure in the second passage 105 based on an injection effect, and the gas in the injection cavity 110 of the injection chamber 11 is sucked into the second passage 105 through the negative pressure.

The separation chamber 12 includes a separation chamber body 121 and a separation chamber 120 formed in the separation chamber body 121, the first passage 104 and the recirculation intake passage 102 are formed in the separation chamber body 121, and the first passage 104 and the recirculation intake passage 102 communicate with the separation chamber 120 of the separation chamber 12. The recirculated hydrogen enters the separation chamber 120 of the separation chamber 12 from the recirculation inlet passage 102, wherein the recirculated hydrogen in the separation chamber 120 is sucked into the ejector chamber 11 through the first passage 104 by the negative pressure formed by the ejector passage 20 in the second passage 105.

The slow release chamber 13 comprises a slow release chamber main body 131, a slow release cavity 130 formed in the slow release chamber main body 131, and a slow release chamber air inlet 132, wherein the slow release chamber air inlet 132 is communicated with the second channel 105 in the slow release cavity 130, and the injection channel 20 introduces hydrogen and recycled hydrogen into the slow release cavity 130 of the slow release chamber 13 through the second channel 105.

Preferably, in the preferred embodiment of the present invention, the second passage 105 of the circulation device body 10 is in a throat structure, that is, an opening of the ejection chamber air outlet 112 communicated with the second passage 105 is larger than an opening of the slow release chamber air inlet 132 of the slow release chamber 13, so that the ejection passage 20 forms a negative pressure in the second passage 105 and absorbs the gas in the ejection cavity 110 of the ejection chamber 11.

As shown in fig. 6A and 6C, the second passage 105 of the circulation device main body 10 further includes a main air passage 1051 and a bleed air passage 1052 communicated with the main air passage 1051, wherein the main air passage 1051 is communicated with the slow-release chamber 130 of the slow-release chamber 13 through the slow-release chamber air inlet 132, and the bleed air passage 1052 is communicated with the bleed chamber 110 through the bleed chamber air outlet 112 of the bleed chamber 11.

Preferably, the draft tube 1052 of the second channel 105 is in a basin shape, that is, the draft tube 1052 of the second channel 105 is in an open structure facing the draft cavity 110 of the draft chamber 11, so as to allow the draft tube 1052 of the second channel 105 to absorb the gas in the draft cavity 110 of the draft chamber 11 when the second channel 105 generates negative pressure.

The hydrogen circulation device 100 further includes at least one recirculation inlet cell 31 and at least one outlet cell 32, wherein the recirculation inlet cell 31 is disposed in the recirculation inlet channel 102 of the circulation device body 10, and the outlet cell 32 is disposed in the outlet channel 103 of the circulation device body 10. The recirculated hydrogen gas is drawn into the separation chamber 120 of the separation chamber 12 through the recirculated gas intake unit 31, and is 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 cavity 130 of the slow-release chamber 13 is led out through the gas outlet unit 32.

As shown in fig. 4A and 4B, the circulation device main body 10 includes a circulation device body 14, an upper cover 15, and a bottom plate 16, wherein the upper cover 15 is located at an upper end of the circulation device body 14, the bottom plate 16 is located at a lower end of the circulation device body 14, and the circulation device body 14 is sealingly connected with the upper cover 15 and the bottom plate 16. It is understood that the ejector chamber 11, the separation chamber 12, and the slow-release chamber 13 of the circulator main body 10 are composed of, formed together with, or are part of the circulator main body 14, the cover 15, and the floor 16.

Preferably, in the preferred embodiment of the present invention, the injection 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; the slow release chamber 13 is composed of the circulating device body 14, the upper cover plate 15 and the bottom plate 16. As will be understood in the art, the ejector chamber 11, the separation chamber 12, and the slow-release chamber 13 of the circulator main body 10 are integrated with the circulator main body 14, the upper cover 15, and the bottom plate 16, so that the overall structure of the circulator main body 10 is simplified and miniaturized.

Preferably, in the preferred embodiment of the present invention, the ejector 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 upwards to the ejector cavity 110 of the ejector chamber 11 through negative pressure, so as to allow steam-water separation of the recycled hydrogen in the separation cavity 120 of the separation chamber 12. In other words, the recycled hydrogen is sucked into the separation cavity 120 of the separation chamber 12, and a revolving airflow with a specific rotating direction is formed in the separation chamber 12, so that the water vapor in the recycled hydrogen is rotated to be separated from the hydrogen in the recycled hydrogen, and the steam-water separation is realized. The separation chamber 12 is further provided with an inner wall 123, wherein the inner wall 123 surrounds the periphery of the separation chamber 120, and the revolving airflow formed by the recycled hydrogen collides with the inner wall 123 of the separation chamber 12, so as to facilitate the separation of water vapor in the recycled hydrogen. Preferably, in this preferred embodiment of the invention, the inner wall 123 of the separation chamber 12 is embodied as an annular surface.

It will be appreciated that the water separated from the recirculated hydrogen is collected in the lower end of the separation chamber 120 of the separation chamber 12. Optionally, in other optional embodiments of the present invention, the ejection chamber 11 is disposed at the side of the separation chamber 12.

The circulation device body 10 further includes an ejector gas inlet pipe 17, wherein the ejector gas inlet pipe 17 is provided in the first passage 104, and the recirculated hydrogen gas in the separation chamber 12 is drawn into the ejector chamber 110 of the ejector chamber 11 through the ejector gas inlet pipe 17. The injection air inlet pipe 17 includes an air inlet pipe upper end portion 171 and an air inlet pipe lower end portion 172 integrally extending downward from the air inlet pipe upper end portion 171, wherein the air inlet pipe upper end portion 171 leads to the injection cavity 110 of the injection chamber 11, and the air inlet pipe lower end portion 172 leads to the separation cavity 120 of the separation chamber 12. The injection gas inlet pipe 17 is further provided with an injection gas inlet passage 173, and an injection gas inlet 174 and an injection gas outlet 175 which are communicated with the injection gas inlet passage 173, wherein the injection gas inlet 174 is positioned at the bottom end of the lower end part 172 of the gas inlet pipe, and the circulating hydrogen in the separation cavity 120 of the separation chamber 12 enters the injection gas inlet passage 173 from the injection gas inlet 174. The injection air outlet 175 is located at the top end of the upper end portion 171 of the air inlet pipe, wherein the injection cavity 110 of the injector 11 absorbs the recirculated hydrogen in the injection air inlet passage 173 from the injection air outlet 175. It should be noted that the lower end 172 of the gas inlet pipe is located at the middle or lower position of the separation cavity 120 of the separation chamber 12, so that the injection gas inlet pipe 17 sucks the hydrogen gas at the middle or lower position of the separation cavity 120 of the separation chamber 12.

It can be understood that the ejector passage 20 ejects hydrogen gas, when the negative pressure formed by the second passage 105 sucks hydrogen gas in the separation cavity 120 of the separation chamber 12 through the ejector chamber 11 and the ejector gas pipe 17, so that when the recirculated hydrogen gas enters the separation cavity 120 of the separation chamber 12, the recirculated hydrogen gas is sucked into the ejector gas pipe 17 to form a suction vortex, so as to suck the recirculated hydrogen gas circumferentially and radially downward from the upper part of the separation cavity 120 of the separation chamber 12 and suck the recirculated hydrogen gas circumferentially inward and radially upward from the middle part or a position below the middle part of the separation cavity 120 of the separation chamber 12 into the ejector gas inlet passage 173 of the ejector gas pipe 17.

It will be appreciated that the suction vortex created by the suction of the recycled hydrogen gas in the separation chamber 12 is such that the water vapor in the recycled hydrogen gas substantially collides with the inner wall 123 of the separation chamber 12 to facilitate the water vapor in the recycled hydrogen gas to be deposited on the inner wall 123 of the separation chamber 12. In addition, the suction vortex formed by the suction of the recycled hydrogen in the separation chamber 12 enables the water vapor in the recycled hydrogen to be separated out through rotation and hydrogen separation, so as to facilitate the water vapor separation of the recycled hydrogen.

Preferably, the separation chamber 12 has a central axis L, wherein the injection inlet pipe 17 is arranged along the central axis L of the separation chamber 12, i.e. the injection inlet pipe 17 is arranged at the central axis L of the separation chamber 12. More preferably, in the preferred embodiment of the present invention, the separation cavity 120 of the separation chamber 12 is cylindrical, and the ejector gas inlet pipe 17 is located at the position of the central axis L of the separation chamber 12. It is understood that the suction vortex formed by the suction of the recirculated hydrogen gas into the ejector gas pipe 17 sucks the recirculated hydrogen gas circumferentially and radially downward from the upper portion of the separation chamber 120 of the separation chamber 12 centering on the ejector gas pipe 17, and sucks it circumferentially inward and radially upward from the middle portion or a position below the middle portion of the separation chamber 120 of the separation chamber 12 into the ejector gas inlet passage 173 of the ejector gas pipe 17.

The recirculation air inlet passage 102 is provided with a first recirculation air inlet channel 1021, a second recirculation air inlet channel 1022, an external opening 1023 and an internal opening 1024, wherein the internal opening 1024 and the external opening 1023 are communicated with the first recirculation air inlet channel 1021, and the second recirculation air inlet channel 1022 is communicated with the first recirculation air inlet channel 1021 in the injection cavity 110 of the injection chamber 11. Recycled hydrogen is sucked from the first recycle inlet 1021 to the separation chamber 120 of the separation chamber 12; or the circulating hydrogen is sucked into the injection cavity 110 of the injection chamber 11 from the second recirculation inlet 1022.

Preferably, in the preferred embodiment of the present invention, the recirculation gas inlet 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 gas inlet channel 102 is located at 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 gas inlet channel 102 is staggered with the injection gas inlet pipe 17, so that the recirculation hydrogen forms the suction vortex when the recirculation hydrogen is sucked into the separation chamber 120 of the separation chamber 12. In other words, the opening direction of the internal opening 1024 of the recirculation gas inlet passage 102 does not correspond to the forward direction of the injection gas inlet pipe 17, which is beneficial for the recirculated hydrogen to form the suction vortex. More preferably, one side of the internal opening 1024 of the recirculation inlet channel 102 is tangential to the internal wall 123 of the separation chamber 12.

As shown in fig. 6A to 6C, the slow release chamber 13 further includes at least one baffle 133, wherein the baffle 133 is disposed in the slow release chamber 130 of the slow release chamber 13, and hydrogen or recycled hydrogen is introduced into the slow release chamber 130 of the slow release chamber 13, wherein the hydrogen or recycled hydrogen is blocked by the baffle 133 and impinges on the surface of the baffle 133, so that water in the hydrogen or recycled hydrogen is separated out, thereby achieving water-vapor separation.

Preferably, in the preferred embodiment of the present invention, the baffles 133 are vertically arranged in the slow release chamber 130 of the slow release chamber 13, and at least one of the baffles 133 is adjacent to the second channel 105, so that the gas flow injected through the second channel 105 impinges on a surface of the baffles 133, and the separation of hydrogen and water vapor is realized by utilizing the principle of baffle separation. More preferably, in this preferred embodiment of the present invention, the baffle 133 is integrally formed with or provided to the circulation device body 14 and the upper cover 15 of the circulation device main body 10.

Optionally, in other alternative embodiments of the present invention, the number of the baffles 133 is two or more, wherein the baffles 133 are arranged at intervals in the slow release chamber 130 of the slow release chamber 13, so that when the hydrogen or the recycled hydrogen moves in the slow release chamber 130, water vapor is separated out from the baffles 133, thereby improving the steam-water separation efficiency. It is worth mentioning that the liquid water treated by the slow release chamber 13 is collected at the bottom of the slow release cavity 130 of the slow release chamber 13.

As shown in fig. 4A to 6C, the spatial volume of the slow release cavity 130 of the slow release chamber 13 is greater than the volumes of the injection cavity 110 of the injection chamber 11 and the separation cavity 120 of the separation chamber 12, so that the hydrogen gas entering the slow release cavity 130 of the slow release chamber 13 is buffered, and the gas pressure of the slow release cavity 130 of the slow release chamber 13 is stabilized.

In detail, when the pressure of the hydrogen injected from the injection channel 20 fluctuates or the pressure of the recirculated hydrogen fluctuates, because the space volume of the slow release cavity 130 of the slow release chamber 13 is large, the hydrogen entering the slow release chamber 13 or the recirculated hydrogen is mixed with the hydrogen stored in the slow release cavity 130, and the pressure fluctuation of the hydrogen injected from the injection channel 20 and/or the pressure fluctuation of the recirculated hydrogen are buffered, so as to reduce the pressure fluctuation of the hydrogen output from the gas outlet channel 103 and improve the pressure stability of the hydrogen output from the gas outlet channel 103. When the pressure of the air outlet unit 32 is too fast and/or the air leakage occurs in the air outlet channel 103 of the main body 10 of the circulation device, the hydrogen stored in the slow release cavity 130 of the slow release chamber 13 can be supplemented in time to avoid the too fast pressure release.

As shown in fig. 4A and 4B, 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 operation state of the control valve 60 based on the humidity data detected by the humidity sensor 40, so as to adjust the humidity of the hydrogen gas output from the circulation device main body 10 of the hydrogen circulation device 100.

The hydrogen circulation device further comprises at least one temperature and pressure sensor 33, wherein the temperature and pressure sensor 33 is disposed 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 operation state of the control valve 60 and the like according to the temperature and pressure sensor 50.

The humidity sensor 40 is disposed in the slow release cavity 130 of the slow release chamber 13 to detect the humidity of hydrogen in the slow release cavity 130 of the slow release chamber 13. Preferably, in this preferred implementation 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 gas output from the gas outlet channel 103. It is understood that the humidity sensor 40 is adjacent to the air outlet channel 103 of the circulation device body 10, and the detection data thereof and the humidity of the hydrogen gas output from the circulation device body 10 can be considered to be consistent. Therefore, the humidity of the gas in the circulation device body 10 is controlled by the humidity data information detected by the humidity sensor 40, so that the humidity of the hydrogen gas output from the hydrogen circulation device 100 can be kept stable.

The control valve 60 is provided in the injection chamber main body 111 of the injection chamber 11, and is used to control the on/off of the second recirculation inlet passage 1022 of the recirculation inlet passage 102, thereby distributing the flow rate of the recirculated hydrogen gas and adjusting the flow direction of the recirculated hydrogen gas.

As shown in fig. 7A and 7B, 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. In detail, 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 cavity 130 of the slow-release chamber 13 is smaller 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 inlet 1022 of the recirculation inlet passage 102 is communicated with the injection cavity 110 of the injection chamber 11, so as to allow the recirculated hydrogen to directly reach the injection cavity 110 of the injection chamber 11 through the second recirculation inlet 1022 of the recirculation inlet passage 102. Because the concentration of water vapor in the recirculated hydrogen is higher, the recirculated hydrogen is directly sucked into the slow release cavity 130 of the slow release chamber 13 through the injection chamber, so that the humidity of the hydrogen in the slow release cavity 130 of the slow release chamber 13 is increased.

When the humidity sensor 40 detects that the humidity value in 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 be in the closed position 601, and the second recirculation inlet 1022 of the recirculation inlet passage 102 is blocked, so that all the recirculated hydrogen enters the separation cavity 120 of the separation chamber 12 through the first recirculation inlet 1021 of the recirculation inlet passage 102, and is sucked into the injection cavity 110 of the injection chamber 11 after liquid-gas separation in the separation chamber 12. It can be understood that after the water vapor in the recirculated hydrogen gas is subjected to the steam-water separation in the separation chamber 12 and the steam-water separation again in the slow-release chamber 13, the water vapor content in the hydrogen gas in the slow-release cavity 130 of the slow-release chamber 13 is reduced, so that the humidity of the hydrogen gas output by the hydrogen circulation device is reduced.

It should be noted that in the preferred embodiment of the present invention, when the controller 50 controls the control valve 60 to be in the open position 602, most of the recirculated hydrogen directly reaches the injection cavity 110 of the injection chamber 11 through the second recirculation inlet passage 1022 of the recirculation inlet passage 102, and a small part of the recirculated hydrogen enters the separation cavity 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 supplied from the hydrogen circulation device 100 is automatically adjusted by the controller 50 to the control valve 60.

Preferably, in this preferred embodiment of the present invention, the control valve 60 is implemented as a solenoid bypass valve. It will be understood by those skilled in the art that the controller 50 may be implemented as other 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 operation state of the control valve 60 according to the control signal.

As shown in fig. 7A and 7B, the liquid water separated from the separation cavity 120 of the separation chamber 12 is collected at the bottom of the separation chamber 12, wherein the liquid water separated from the slow release chamber 13 is collected at the bottom of the slow release chamber 13, wherein a communication channel 106 is provided between the separation cavity 120 of the separation chamber 12 and the slow release cavity 130 of the slow release chamber 13, wherein the communication channel 106 communicates the separation cavity 120 of the separation chamber 12 and the slow release cavity 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.

The hydrogen circulation device 100 further includes a water discharge valve 70, wherein the water discharge valve 70 is disposed in the separation chamber 12, and wherein the water discharge valve 70 is communicated with the separation chamber 120 of the separation chamber 12. The drain valve 70 is electrically connected to the controller 50, and the controller 50 controls the operation state of the drain valve 70. When the water discharge valve 70 is opened, the water discharge valve 70 is used to discharge the water stored in the separation chamber 120 of the separation chamber 12.

It will be understood by those skilled in the art that the water discharge valve 70 is optionally further installed in the slow release chamber 13 and is communicated 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 water discharge valve 70 may be, but is not limited to, a solenoid valve.

As shown in fig. 7A and 7B, 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, i.e., the liquid level sensor 80 is held at a lower position of the separation chamber 120 of the separation chamber 12 to detect a liquid level height in the separation chamber 120 of the separation chamber 12. The liquid level sensor 80 is communicatively connected to the controller 50, wherein the controller 50 controls the operation state of the water drain valve 70 according to the detection data of the liquid level sensor 80, thereby achieving automatic water drainage of the hydrogen circulation device 100.

It is worth mentioning that the air pressure of the slow release cavity 110 of the injection chamber 11 is P1, the air pressure of the separation cavity 120 of the separation type 12 is P2, and the air pressure 3 of the slow release cavity 130 of the slow release chamber 13 is P3, so that the injection passage 20 generates an injection effect in the second passage 105, and the pressure of the slow release cavity P3 is greater than the pressure of the separation cavity P2 is greater than the pressure of the injection cavity P1. It is understood that the water collected in the separation chamber 12 flows into the slow release chamber 130 of the slow release chamber 13 through the communication passage 106 due to the pressure difference.

The liquid level sensor 80 sets at least one alarm value, and 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 chamber 120 of the separation chamber 12 triggers the liquid level sensor 80, the controller 50 controls the water drain valve 70 to open according to the detection information of the liquid level sensor 80, so as to release the liquid water stored in the separation chamber 120 of the separation chamber 12. When the liquid level drops, the liquid level sensor 80 cancels the alarm, and the controller 50 instructs the water drain valve 70 to close, thereby completing the automatic water drainage.

The hydrogen circulation device 100 further comprises an isolation diaphragm 90, wherein the isolation diaphragm 90 is disposed in the separation chamber 12, wherein the isolation diaphragm 90 is located above the liquid level sensor 80 to isolate hydrogen gas from liquid water. It is understood that the separation chamber 120 of the separation chamber 12 is separated by the isolation diaphragm 90 into a liquid-gas separation chamber 1201 and a water collection chamber 1202, wherein a suction vortex due to a negative pressure occurs in the liquid-gas separation chamber 1201 of the isolation diaphragm 90. Liquid water separated out from the separation chamber 12 is collected in the water collection cavity 1202 through the isolation membrane 90. Preferably, in this preferred embodiment of the present invention, the isolation diaphragm 90 is disposed at a middle or lower-middle position of the separation chamber 12.

It should be noted that the isolation film 90 is a porous structure, wherein liquid water can permeate through the isolation film 90, and the isolation film 90 can effectively block the flow of hydrogen in the liquid-gas separation chamber 1201, thereby avoiding disturbance of the suction vortex to the liquid level and distorting data acquisition of the liquid level sensor 80. It is worth mentioning that the separation membrane 90 is implemented as a gas-water separation membrane, which allows liquid water to permeate therethrough and effectively blocks gas vortex.

Fig. 8 of the accompanying drawings illustrates another alternative embodiment of the hydrogen circulation device 100. In contrast to the first preferred embodiment, in this preferred embodiment of the present invention, the recycled hydrogen is pumped into the separation chamber 12 of the hydrogen circulation device 100, i.e. the recycled hydrogen has a gas pressure between entering the separation chamber 12, such that the separation chamber pressure P2 > the injection chamber pressure P > 1 the slow release chamber pressure P3. Unlike the preferred embodiment, the water discharge valve 70 is disposed in the slow release chamber 13 and is communicated 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.

The liquid level sensor 80 is disposed at the bottom of the slow release chamber 13, that is, the liquid level sensor 80 is held at a lower position of the slow release chamber 130 of the slow release chamber 13 to detect a liquid level height in the slow release chamber 130 of the slow release chamber 13. The liquid level sensor 80 is communicatively connected to the controller 50, wherein the controller 50 controls the operation state of the water drain valve 70 according to the detection data of the liquid level sensor 80, thereby achieving automatic water drainage of the hydrogen circulation device 100.

Referring to fig. 9 of the drawings accompanying the present specification, another alternative embodiment of a hydrogen circulation device 100 according to the above first preferred embodiment of the present invention will be illustrated in the following description. Different from the above preferred embodiment, the number of the injection passages 20 of the hydrogen circulation device 100 is one or more. Illustratively, in the preferred embodiment of the present invention, the number of the injection passages 20 is two (i.e., 20a, 20b), wherein the

injection passages

20a, 20b can be operated simultaneously or independently to meet the requirements of different hydrogen supply flow rates.

In accordance with another aspect of the present invention, there is further provided a recycling method of a hydrogen recycling apparatus, wherein the recycling method includes the steps of:

(a) introducing hydrogen at high pressure into a second channel 105 of a circulating device main body 10, introducing the hydrogen into a slow release chamber 13 through the second channel 105, and generating negative pressure in the second channel 105; and

(b) sucking the recirculating hydrogen from a recirculating gas inlet passage 102 to a separation chamber under negative pressure, forming a suction vortex to suck the recirculating hydrogen circumferentially and radially downward from the upper part of the separation chamber 12 and to suck the recirculating hydrogen circumferentially and radially upward from the separation chamber 12 to a first passage 104, sucking the recirculating hydrogen to a second passage 105 through an ejector chamber 11, and then introducing the recirculating hydrogen into the slow release chamber 13 through the second passage 105 to be mixed with the hydrogen in the slow release chamber 13.

In the above circulation method of the present invention, further comprising the steps of: the hydrogen gas flow introduced into the second channel 105 and the recirculated hydrogen gas flow are blocked by at least one baffle 133 of the slow release chamber 13, and the gas flow ejected from the second channel 105 impinges on the baffle 133 to separate out the water vapor in the gas flow.

In the above circulation method of the present invention, further comprising the steps of: detecting the humidity in the slow-release chamber 13, and controlling the operating state of a control valve 60 according to a set humidity value, when the humidity value detected by the humidity sensor 40 is smaller than the set target humidity value, controlling the control valve 60 to be at an open position 602 by a controller 50, where the control valve 60 conducts a second recirculation inlet 1022 of the recirculation inlet passage 102 to the injection cavity 110 of the injection chamber 11, so as to allow the recirculated hydrogen to directly reach the injection cavity of the injection chamber 11 through the second recirculation inlet 1022 of the recirculation inlet passage 102; 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 at a closed position 601, and the second recirculation inlet 1022 of the recirculation inlet channel 102 is blocked by the control valve 60, so that all of the recirculated hydrogen enters the separation chamber 120 of the separation chamber 12 through a first recirculation inlet 1021 of the recirculation inlet channel 102.

Referring to fig. 10 of the drawings accompanying this specification, a fuel cell hydrogen supply system according to another aspect of the present invention is illustrated in the following description. The fuel cell hydrogen supply system is configured such that a stack 1000 supplies hydrogen. 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. The hydrogen supply device 200 is connected to an injection passage 20 of the hydrogen circulation device 100, an air outlet unit 32 of the hydrogen circulation device 100 is connected to an air inlet end of the cell stack, and an air outlet end of the cell stack is connected to a recirculation 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 injection passage 20, wherein the hydrogen discharged after the stack reaction is introduced into the circulation device 10 through the recirculation gas inlet unit 31, and wherein the introduced hydrogen of the hydrogen supply device 200 and the residual recirculation hydrogen after the stack reaction are mixed in the circulation device body 10 of the hydrogen circulation device 100. The moderated hydrogen is introduced from the circulation device body 10 to the stack through the gas outlet unit 32, so as to be used by the stack.

The exhaust device 300 is connected to the stack and the hydrogen circulation device 100, wherein water generated by the stack and water generated by the hydrogen circulation device 100 are exhausted to the external environment through the exhaust device 300.

The fuel cell hydrogen supply system further comprises 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 for adjusting the pressure of hydrogen gas introduced from the hydrogen supply device 200 to the hydrogen circulation device 100. The pressure relief valve 500 is disposed between the stack and the exhaust 300, and is used to control the stack to discharge waste through the exhaust 300 and to regulate the stack pressure. Preferably, the pressure relief valve 500 may be, but is not limited to, a solenoid valve.

A fuel cell hydrogen supply system according to another aspect of the present invention is illustrated in the following description with reference to figure 11 of the accompanying drawings. Unlike the above-mentioned preferred embodiment, the fuel cell hydrogen supply system further includes at least one circulation pump 600, wherein the circulation pump 600 is disposed between the hydrogen circulation device 100 and the exhaust end of the stack, and the circulation pump 600 is communicated with the recirculation air intake unit 31 of the hydrogen circulation device 100 at the exhaust end of the stack. The circulation pump 600 increases the pressure of the circulating hydrogen gas introduced into the circulation device body 10 to increase the power of the fuel cell.

It should be noted that, in the preferred embodiment of the present invention, the water discharge valve 70 and the liquid level sensor 80 of the hydrogen circulation device 100 are disposed in the slow release chamber 13.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A hydrogen gas circulation device adapted to mix a hydrogen gas and a recirculated hydrogen gas, said hydrogen gas circulation device comprising:

2. The hydrogen circulation device according to claim 1, wherein the injection chamber further comprises an injection chamber body, an injection cavity formed in the injection chamber body, and an injection chamber air outlet, wherein the injection cavity of the injection chamber is communicated with the injection chamber air outlet through the second passage, the air inlet passage corresponds to the injection chamber air outlet of the injection chamber in the forward direction, and the injection passage extends from the air inlet passage to the injection chamber air outlet of the injection chamber.

3. The hydrogen circulation device according to claim 2, wherein the second passage of the circulation device body further comprises a main passage and a bleed passage communicating with the main passage, and the bleed passage of the second passage is in the shape of a basin.

4. The hydrogen circulation device according to claim 2, further comprising at least one recirculation inlet gas unit provided in the recirculation inlet passage of the circulation device body and at least one outlet gas unit provided in the outlet passage of the circulation device body.

5. The hydrogen circulation device according to claim 1, wherein the circulation device main body comprises a circulation device body, an upper cover plate, and a bottom plate, wherein the upper cover plate is located at an upper end of the circulation device body, the bottom plate is located at a lower end of the circulation device body, and the circulation device body is sealingly connected to the upper cover plate and the bottom plate, and the ejector chamber, the separation chamber, and the slow-release chamber of the circulation device main body are composed of, formed together with, 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 inlet pipe, wherein the ejector inlet pipe is provided in the first passage, and the recirculated hydrogen gas in the separation chamber is sucked into the ejector chamber through the ejector inlet pipe.

7. The hydrogen circulation device according to claim 6, wherein the ejector air inlet pipe comprises an upper air inlet pipe end and a lower air inlet pipe end integrally extending downward from the upper air inlet pipe end, wherein the upper air inlet pipe end opens into the ejector chamber, the lower air inlet pipe end opens into the separation chamber, and when the recirculated hydrogen enters the separation chamber, the recirculated hydrogen is sucked into the ejector air inlet pipe to form a suction vortex, so that the recirculated hydrogen is sucked downward from the upper portion of the separation chamber in a circumferential direction and in a radial direction, and is sucked into the ejector air inlet pipe from the separation chamber in a circumferential direction inward and in a radial direction upward.

8. The hydrogen circulation device according to claim 7, wherein the separation chamber has a central axis, wherein the ejector gas inlet pipe is provided along the central axis of the separation chamber, the separation chamber has a cylindrical shape, and the suction vortex formed by sucking the recirculated hydrogen gas into the ejector gas inlet pipe is centered on the ejector gas inlet pipe.

9. The hydrogen circulation device according to claim 7, wherein the recirculation inlet passage is located at an upper portion of the separation chamber, and an internal opening of the recirculation inlet passage is located at a side of the inner wall of the separation chamber, and an opening direction of the internal opening of the recirculation inlet passage is staggered with respect to the ejector inlet pipe.

10. A hydrogen circulation device according to claim 7, wherein the slow release chamber further comprises at least one baffle arranged in a vertical manner in the slow release chamber, and at least one baffle is 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 volumes of the ejection chamber and the separation chamber, so that hydrogen gas entering the slow-release chamber is buffered to stabilize the gas pressure of the slow-release chamber.

12. The hydrogen circulation device according to claim 7, wherein the recirculation inlet passage has a first recirculation inlet, a second recirculation inlet, an external opening, and an internal opening, wherein the internal opening and the external opening are connected to the first recirculation inlet, and the second recirculation inlet is connected to the first recirculation inlet in the ejection chamber.

13. The hydrogen circulation device according to claim 12, further comprising a humidity sensor, a controller, and a control valve, wherein the humidity sensor and the control valve are communicatively connected to the controller, the control valve is controlled by the controller based on humidity data detected by the humidity sensor, wherein the control valve is located in the second recirculation inlet, and the controller controls an operating state of the control valve based on the humidity sensor, thereby controlling on/off of the second recirculation inlet.

14. The hydrogen circulation device according to claim 13, wherein the humidity sensor is disposed in the slow-release chamber and adjacent to the gas outlet passage, the control valve has a closed position and an open position, and when the control valve is in the open position, the second recirculation inlet passage of the recirculation inlet passage is in communication with the injection chamber to allow the recirculated hydrogen to reach the injection chamber through the second recirculation inlet passage of the recirculation inlet passage; when the control valve is in the closed position, the second recirculation inlet of the recirculation inlet passage is blocked such that all of the recirculated hydrogen enters the separation chamber through the first recirculation inlet of the recirculation inlet passage.

15. A hydrogen circulation device according to claim 13, wherein a communication passage is provided between the separation chamber and the slow-release chamber, wherein the communication passage communicates 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.

16. The hydrogen circulation device according to claim 15, further comprising a water discharge valve and at least one liquid level sensor, wherein the water discharge valve and the liquid level sensor are electrically connected to the controller, the liquid level sensor is disposed at the bottom of the separation chamber, the water discharge valve is conductively connected to the separation chamber, wherein the controller controls an operation state of the water discharge valve based on detection data of the liquid level sensor so that the hydrogen circulation device automatically discharges water.

17. The hydrogen circulation device according to claim 15, further comprising a water discharge valve and at least one liquid level sensor, wherein the water discharge valve and the liquid level sensor are electrically connected to the controller, the liquid level sensor is disposed at the bottom of the slow release chamber, the water discharge valve is conductively connected to the slow release chamber, wherein the controller controls an operation state of the water discharge valve based on detection data of the liquid level sensor, so that the hydrogen circulation device automatically discharges water.

18. A hydrogen-recycling apparatus according to claim 13, further comprising a separation membrane, wherein the separation membrane is disposed in the separation chamber, the separation membrane separates the separation chamber into a liquid-gas separation chamber and a water collection chamber, the liquid water separated from the separation chamber is collected in the water collection chamber through the separation membrane, the separation membrane is disposed in the middle of the separation chamber or at a position lower than the middle of the separation chamber, and the separation membrane has a porous structure allowing the liquid water to permeate therethrough.

19. A hydrogen recycling process, wherein said recycling process comprises the steps of:

20. The recycling method of claim 19, further comprising the steps of: the at least one baffle of the slow release chamber blocks the hydrogen airflow and the recirculated hydrogen airflow introduced into the second channel, and the airflow ejected from the second channel impacts the baffle to separate out water vapor in the airflow.

21. The recycling method of claim 19, further comprising the steps of: detecting the humidity in the slow release chamber, controlling the working state of a control valve according to a set humidity value, and controlling the control valve to be in an open position by a controller when the detected humidity value is smaller than the set target humidity value, wherein the control valve conducts a second recirculation air inlet channel of the recirculation air inlet channel to the injection chamber so as to allow the recirculation hydrogen to directly reach the injection chamber through the second recirculation air inlet channel of the recirculation air inlet channel; when the detected humidity value is larger than the set target humidity value, the controller controls the control valve to be in a closed position, the second recirculation air inlet channel of the recirculation air inlet channel is blocked by the control valve, and therefore all the recirculation hydrogen enters the separation chamber through a first recirculation air inlet channel of the recirculation air inlet channel.