KR100974756B1 - Hydrogen supply chamber using multi-ejector and hydrogen supply assembly comprising the same - Google Patents

Abstract

The present invention relates to a structure of a hydrogen supply chamber using a mechanical valve for a multi ejector of a hydrogen recycle system, and a hydrogen supply assembly including the same, to enable hydrogen supply and hydrogen recycling according to each load changed during operation of a fuel cell vehicle. Providing a hydrogen supply system including a multi ejector, and providing a configuration including a hydrogen supply chamber structure correspondingly connected to each ejector of the multi ejector and a mechanical valve for opening and closing each chamber of the hydrogen supply chamber structure The present invention provides a structure of a hydrogen supply chamber using a mechanical valve for a multi ejector of a hydrogen recirculation system configured to selectively control an appropriate ejector for a required load according to a change in pressure, and a hydrogen supply assembly including the same.

Particularly, in the present invention, as a specific configuration for achieving the above object, an injection channel into which hydrogen gas is introduced, a first chamber connected to the injection channel, and having a connection hole formed at a lower portion thereof, are connected to the first ejector from the first chamber. One or more auxiliary chambers formed in the lower portion of the first connection channel and the first chamber, and in the case where there are two or more auxiliary chambers, a connection hole is connected to the lower auxiliary chamber at the lower end of the auxiliary chamber except the lower auxiliary chamber. One or more auxiliary chambers formed in the one or more auxiliary chambers, the one or more mechanical valves configured to open and close according to pressure changes in the chamber above the connection holes corresponding to each connection hole, and each of the one or more auxiliary chambers. One or more auxiliary connection paths to the corresponding ejector, In addition to the effect of volume reduction and cost savings in production due to the simplification, the hydrogen supply chamber structure using a mechanical valve for the multi ejector of the hydrogen recycling system with high reliability despite the simplified configuration is provided.

Fuel Cell, Hydrogen Recirculation, Ejector, Multi Ejector, Mechanical Valve

Description

Hydrogen supply chamber using multi-ejector and hydrogen supply assembly comprising the same}

The present invention relates to a hydrogen supply structure using a mechanical valve for a multi ejector of a hydrogen recirculation system and a hydrogen supply assembly including the same. Hydrogen recirculation system including a multi-ejector for supplying a stack and recycling residual hydrogen gas, the hydrogen selectively to the appropriate ejector to ensure optimum performance in response to changes in the hydrogen supply flow rate according to the vehicle output requirements The present invention relates to a hydrogen supply structure using a mechanical valve for a multi ejector for supplying a hydrogen supply assembly and a hydrogen supply assembly including the same.

Recently, interest in alternative energy is increasing in the era of high oil prices, which have been accompanied by exhaustion of fossil energy resources, and fuel cell vehicles are drawing attention as being able to replace internal combustion engine cars in the automobile field.

A fuel cell vehicle is a vehicle that generates electric energy by reacting oxygen with air in a fuel cell stack using hydrogen as a fuel. Since hydrogen, the fuel of a fuel cell vehicle, has a very large volume in a gas state, a method of storing it as a high-pressure gas, liquid hydrogen, or metal hydride in order to achieve a sufficient driving distance by charging once has been studied. In the method of storing high pressure hydrogen gas in the high pressure hydrogen fuel tank of 350 bar or 700 bar, since the high pressure hydrogen gas cannot be directly supplied to the fuel cell stack, the pressure is generally reduced in two stages so that the hydrogen of the low pressure (typically less than 1 bar) is reduced. Gas is supplied to the fuel cell stack, and the reduced pressure hydrogen gas is supplied to the fuel cell stack through an ejector to generate electrical energy by reacting with oxygen in the air supplied to the fuel cell stack.

In addition to the function of supplying low pressure hydrogen gas to the fuel cell stack, the ejector utilizes a low pressure generated by a high-speed hydrogen jet (Jet) as a high pressure hydrogen gas passes through a nozzle (a reduction nozzle or a reduced expansion nozzle). It is a device that performs the function of sucking and recycling unreacted hydrogen gas.

The ejector is a device widely used in general industrial fields. In particular, in the case of a multi-ejector method that provides improved performance, it may be easily applied to a fuel cell vehicle if there is no material problem. However, the existing pneumatic ejector and fuel cell ejector using hydrogen require a proper redesign because the operation characteristics are very different due to the difference in gas properties.

One of the important factors in the design of the ejector is the shape of the nozzle, most of which is determined from the shape of the nozzle, the most important design factors for which are the nozzle neck size and the pressure upstream of the nozzle. Among the nozzle shapes, the reduced-type nozzle is suitable for low pressure / low flow rate with subsonic flow, and the reduced-expanded nozzle produces supersonic flow and is suitable for high pressure / high flow rate. In other words, the larger the cross-sectional area of the nozzle neck, the larger the flow rate can flow, the higher the upstream pressure, the larger the flow rate. Therefore, the smaller the ejector nozzle when operating at a lower flow rate, the higher the efficiency, the larger the flow neck operating conditions, the larger the nozzle neck.

Since most of the design points of the hydrogen fuel cell system are designed for high power, the ejector should be designed according to a high flow rate, so it is desirable to increase the cross-sectional area of the nozzle neck. However, when the low flow rate passes, the ejector's suction performance is extremely reduced, so that its inherent performance is not exhibited. Therefore, in a fuel cell vehicle having a very large load variation and a large driving range, a low load driving section as in urban driving This increases the durability and fuel economy of the stack due to the performance of the ejector occurs.

Therefore, when a low flow rate such as low load operation is passed, a configuration of a hydrogen recirculation system having a function of securing a recycle amount by using a low flow rate ejector is required.

As the configuration of the hydrogen recirculation system, the method of adjusting the nozzle neck area to the ejector and the control method through the multi ejector are examined, but in the case of the nozzle neck area method, the system implementation is very difficult due to the precision and mechanical complexity. The ejector method has a problem in that the control is complicated and the degree of freedom of design is lowered because the solenoid valve must be installed and controlled upstream of each ejector.

Therefore, in the present invention, in the structure of the hydrogen supply chamber using a mechanical valve for the multi ejector of the hydrogen recycle system and the hydrogen supply assembly including the same, the hydrogen supply and the hydrogen recycling according to each load changed during operation of the fuel cell vehicle are possible. Providing a hydrogen supply system including a multi ejector, and providing a configuration including a hydrogen supply chamber structure correspondingly connected to each ejector of the multi ejector and a mechanical valve for opening and closing each chamber of the hydrogen supply chamber structure The present invention provides a structure of a hydrogen supply chamber using a mechanical valve for a multi ejector of a hydrogen recirculation system configured to selectively control an appropriate ejector for a required load according to a change in pressure, and a hydrogen supply assembly including the same.

In order to achieve the above object, the present invention provides the following configuration.

The present invention provides a hydrogen supply chamber structure for a multi ejector of a hydrogen recycle system, comprising: an injection passage through which hydrogen gas is introduced; A first chamber connected to the injection channel and having a connection hole formed at a lower portion thereof; A first connection channel connected to the first ejector from the first chamber; At least one auxiliary chamber formed at the bottom of the first chamber, when at least two auxiliary chambers, at least one auxiliary chamber having a connection hole formed at a lower end of the remaining auxiliary chambers except the lower auxiliary chamber so as to be connected to the lower auxiliary chambers. Wow; At least one mechanical valve in the at least one auxiliary chamber configured to open and close in response to a change in pressure in the chamber above the connection hole corresponding to each connection hole; One or more auxiliary connection passages connecting each of the one or more auxiliary chambers to a corresponding ejector; It provides a hydrogen supply chamber structure using a mechanical valve for the multi ejector of the hydrogen recycle system, characterized in that made.

In addition, the at least one auxiliary chamber provides a hydrogen supply chamber structure using a mechanical valve for the multi ejector of the hydrogen recirculation system, characterized in that in series in the vertical direction from the lower side of the first chamber.

In addition, the at least one auxiliary chamber provides a hydrogen supply chamber structure using a mechanical valve for the multi ejector of the hydrogen recirculation system, characterized in that the parallel type is configured in parallel in the horizontal direction below the first chamber.

Here, each of the one or more mechanical valves provides a hydrogen supply chamber structure using a mechanical valve for the multi ejector of the hydrogen recycle system, characterized in that the NC (Normally closed) valve consisting of a valve seat and a spring.

In addition, the first chamber further comprises a pressure transducer for measuring the pressure in the chamber and control means for adjusting the pressure of the hydrogen gas flowing in accordance with the measured pressure in the chamber and the required load. It provides a hydrogen supply chamber structure using a mechanical valve for the multi ejector of the system.

The spring constant of the one or more mechanical valves has a larger spring constant as the nozzle neck size of each ejector connected to the corresponding one or more auxiliary chambers increases, so that the mechanical valve opens sequentially as the pressure increases. It provides a hydrogen supply chamber structure using a mechanical valve for the multi ejector of the hydrogen recycling system.

On the other hand, the present invention is a hydrogen supply assembly for a multi-ejector of the hydrogen recycling system, the pressure control actuator assembly for supplying a regulated pressure of the hydrogen gas; A multi ejector having a plurality of ejectors; A hydrogen supply assembly comprising a hydrogen supply chamber structure corresponding to a plurality of ejectors of the multi ejector, the hydrogen supply chamber structure comprising: an injection passage through which hydrogen gas is introduced; A first chamber connected to the injection channel and having a connection hole formed at a lower portion thereof; A first connection channel connected to the first ejector from the first chamber; At least one auxiliary chamber formed at the bottom of the first chamber, when at least two auxiliary chambers, at least one auxiliary chamber having a connection hole formed at a lower end of the remaining auxiliary chambers except the lower auxiliary chamber so as to be connected to the lower auxiliary chambers. Wow; At least one mechanical valve in the at least one auxiliary chamber, the at least one mechanical valve being configured to open and close in response to a pressure change in the chamber above the connection hole corresponding to each connection hole; One or more auxiliary connection passages connecting each of the one or more auxiliary chambers to corresponding ejectors; It provides a hydrogen supply assembly comprising a hydrogen supply chamber structure using a mechanical valve for the multi ejector of the hydrogen recycle system, characterized in that comprises.

The pressure regulating assembly may further include a fuel shutoff valve integrally formed with one body; A bypass valve; A pressure regulating actuator; A normal flow path formed on the body to transfer hydrogen gas from the fuel shutoff valve to the pressure regulating actuator; An auxiliary flow path formed on the body so that hydrogen gas can be transferred according to opening and closing of the bypass valve connected to the normal flow path; A hydrogen supply assembly comprising a hydrogen supply chamber structure using a mechanical valve for a multi ejector of a hydrogen recycle system is made.

Here, each of the one or more mechanical valves provides a hydrogen supply assembly including a hydrogen supply chamber structure using a mechanical valve for the multi ejector of the hydrogen recycle system, characterized in that the NC (Normally closed) valve consisting of a valve seat and a spring. do.

Further, the spring constant of the one or more mechanical valves has a larger spring constant as the nozzle neck size of each ejector connected to the corresponding one or more auxiliary chambers increases, so that the mechanical valve opens sequentially as the pressure increases. A hydrogen supply assembly comprising a hydrogen supply chamber structure using a mechanical valve for multiple ejectors of a hydrogen recycle system is provided.

As described above, the hydrogen supply structure using the mechanical valve for the multi ejector of the hydrogen recirculation system according to the present invention may compensate for the deterioration of the ejector that may occur during the low load operation of the fuel cell vehicle. Efficient control of hydrogen supply systems, including multiple ejectors, to provide adequate ejector performance, improves fuel economy and stack durability of fuel cell vehicles.

In addition, it is possible to restrict the addition of the electric valve through the mechanical valve implemented to enable optimal control of opening and closing by adjusting the pressure of the hydrogen gas supplied, and can also exclude the configuration for controlling the electric valve electrically. Therefore, the configuration can be simplified to realize the effect of volume reduction and cost reduction in production, as well as to implement a hydrogen supply structure using a mechanical valve for the multi ejector of a high reliability hydrogen recycle system in spite of this simplified configuration.

In the present invention for achieving the above object, in the hydrogen recycle system including a multi ejector, it provides a configuration including a hydrogen supply chamber connected to each ejector of the multi ejector and a mechanical valve for opening and closing each chamber to meet the required load Provided are a structure of a hydrogen supply chamber using a mechanical valve for a multi ejector of a hydrogen recirculation system configured to selectively control an ejector according to a change in pressure, and a hydrogen supply assembly including the same.

1 is a configuration diagram schematically showing a configuration of a fuel cell system including a hydrogen recycling system of a fuel cell vehicle.

As shown in FIG. 1, the high pressure hydrogen gas stored in the hydrogen tank is decompressed to an appropriate pressure through a hydrogen supply assembly and supplied to the anode of the fuel cell stack, and the supplied hydrogen gas is introduced into the cathode through an air blower. Reacts with heavy oxygen. At this time, the hydrogen that did not participate in the reaction is recycled through an ejector or a recirculation blower and supplied again or discharged to the outside through a purge valve.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 shows a hydrogen supply assembly including the structure of a hydrogen supply chamber using a mechanical valve for the multi ejector of the hydrogen recycle system of the present invention.

As shown in FIG. 2, the hydrogen supply assembly 1 includes a fuel shutoff valve 11 for controlling hydrogen gas supply, a proportional control valve 12 for controlling supply pressure of hydrogen gas, A plurality of ejectors (multi ejectors 20) for supplying hydrogen gas to the fuel cell stack and for recycling unreacted hydrogen, a plurality of chambers 31 and 32 partitioned to correspond to the plurality of ejectors (multi ejectors), and It is configured to include a flow path in which hydrogen gas flows in connection with each of the above configurations.

The fuel shutoff valve 11 is connected to the hydrogen tank in a configuration that performs a function of simply supplying or stopping supplying hydrogen gas through an on / off control.

In addition, the proportional control valve 12 is configured to control the flow rate of the hydrogen gas supplied to the fuel cell stack in proportion to the pressure and the pressure in accordance with the linear opening and closing position of the valve, to the fuel shutoff valve Hydrogen gas is transferred to the proportional control valve through the connected flow path.

In this case, the hydrogen gas moved by adjusting the pressure through the fuel shutoff valve 11 and the proportional control valve 12 moves to the multi ejector 20 through the hydrogen supply chamber structure 30 and moves the multi ejector. Through the fuel cell stack.

In the configuration of the present invention, the hydrogen supply chamber structure 30 includes a plurality of chambers corresponding to the number of ejectors of the multi ejector 20, and the hydrogen supply chamber structure 30 has a low pressure / low pressure during low load operation. Always open without a valve for opening and closing so that the hydrogen gas at a flow rate, and is located in the middle of the path of the hydrogen gas from the proportional control valve to the corresponding first ejector 21 and the proportional control valve and the first A first chamber 31 connecting the first ejector 21, an injection passage 33 formed to move hydrogen gas from the proportional control valve to the first chamber 31, and the first chamber 31. It includes a first connection flow path 34 for directly connecting the first chamber 31 and the first ejector 21 so that the hydrogen gas via the first ejector 21 can be discharged. In this case, the first ejector 21 of the multi-ejector is an ejector suitable for low flow rate operation conditions, and is the smallest of the plurality of ejectors constituting the multi-ejector to maintain a sufficient recycle ratio (Stoichiometry Ratio: 1.5) at low load. Consists of having a nozzle neck.

In addition, the hydrogen supply chamber structure 30 includes one or more auxiliary chambers (second chamber, third chamber, etc.) corresponding to each ejector of the multi ejector in addition to the first chamber 31, and the auxiliary chamber Is configured to include an on / off controllable intermediate valve to enable flow of hydrogen gas between the first chamber 31 or another subchamber.

FIG. 2 illustrates a case where a hydrogen supply structure using a mechanical valve for a multi ejector of such a hydrogen recirculation system includes two chambers and one intermediate valve, and the duty control of the proportional control valve shown in FIG. Duty control may be performed to control the set pressure in the first chamber 31 by performing pressure control of the supply hydrogen gas by the proportional control valve according to a demand load that varies according to a driving state of a fuel cell vehicle. . A lower portion of the first chamber 31 is formed with a second chamber 32 separated from the first chamber 31 and a first connection hole 36 communicating with the second chamber, and the first chamber ( The first connecting hole 36 formed between the first chamber 31 and the second chamber 32 is provided with a first intermediate valve 37 which can be turned on and off in accordance with pressure, and is supplied through the proportional control valve. Is configured to enable the flow of hydrogen gas to the second chamber 32 in accordance with the on / off of the first intermediate valve 37.

The first intermediate valve 37 is a valve that is mechanically opened and closed in response to a predetermined pressure value set in the first chamber 31. The first intermediate valve 37 corresponds to the first connection hole 36. It can be configured as a mechanical valve comprising a valve seat and a spring to enable the vertical interlocking of the valve seat. In the steady state, the first intermediate valve 37 is configured such that the first connection hole 36 is completely closed by the valve seat, and interlocked through pressure control of supply hydrogen gas by the proportional control valve. When the pressure in the first chamber 31 is sufficiently increased, the first intermediate valve 37 is opened to constitute an NC (Normally closed) valve in which hydrogen gas in the first chamber 31 is transferred to the second chamber. can do. The second chamber 32 is connected through the second ejector 22 and the second connection flow path 35, and the second ejector 22 is suitable for high flow operation compared to the first ejector 21. It is composed of an ejector having a larger nozzle neck than the first ejector 21 in order to secure more hydrogen supply flow rate and recycle amount.

In addition, by adjusting the spring constant for the spring of the first intermediate valve 37, it is possible to freely set the operating conditions according to the appropriate pressure.

Therefore, according to the configuration of the hydrogen supply assembly as described above, during the first operation of the fuel cell vehicle, the hydrogen gas supplied from the hydrogen tank passes through the first chamber 31 through the fuel shutoff valve and the proportional control valve. The first intermediate valve is supplied from the ejector 21 to the fuel cell stack by increasing the pressure in the first chamber 31 through the pressure control of the proportional control valve during high flow operation requiring a higher output while driving. (37) is opened and configured to enable hydrogen gas supply to the fuel cell stack through the second chamber 32 and the second ejector 22 connected thereto.

In this case, a pressure transducer 38 is disposed in the first chamber 31 to measure a pressure change in the first chamber 31, and to measure the pressure change measured by the pressure transducer. It may be configured to include a control means for performing a duty control of the proportional control valve to control the change in the pressure of the hydrogen gas supplied according to the opening and closing of the first intermediate valve 37.

On the other hand, since specific relations can be set in relation to the pressure and flow rate of the hydrogen supply assembly, the pressure transducer is configured to measure the stack inlet pressure without measuring the pressure in the chamber, and thus control means for performing the pressure control. It can be configured to include.

FIG. 3 illustrates another preferred embodiment of the present invention, which illustrates a hydrogen supply assembly including a pressure regulating actuator assembly implemented to enable driving in a fault home mode.

The pressure regulating actuator assembly 110 configured to include the fuel cutoff valve 111, the bypass valve 114, and the pressure control actuator 112 shown in FIG. In the configuration described in Patent Application No. 2008-0060970, the auxiliary passage 115 in preparation for the failure of the pressure regulating actuator 112 and the bypass valve 114 for opening and closing the auxiliary passage allow constant running even in the failure mode. In addition, when a very high output is required even during normal driving, the bypass valve 114 may be opened to supply sufficient fuel to obtain a high output.

The pressure regulating actuator assembly 110 supplies hydrogen gas through the normal flow passage 113 in the normal operation, but opens the bypass valve in the failure mode or during the high power operation so that the hydrogen gas flows through the auxiliary flow passage. Configure. As shown in FIG. 3, the auxiliary flow path is configured such that hydrogen gas is supplied to the first chamber 131 through a flow path formed around the valve seat based on the A-A cross section.

As shown in FIG. 2, the hydrogen supply chamber structure 130 connected to the pressure regulating actuator has an injection passage 133, a first chamber 131, a first connection hole 136 formed under the first chamber, The first intermediate valve 137, the second chamber 132, the first connection passage 134, and the second connection passage 135 are configured to include the first ejector 121 and the multi ejector 120, respectively. It is configured to be connected to the second ejector 122.

In addition, the hydrogen supply chamber structure is configured to measure the pressure change in the first chamber 131 by a pressure transducer 138 disposed in the first chamber 131, and is measured by the pressure transducer It may be configured to include a control means for controlling the flow rate / pressure of the pressure regulating actuator to control the change in the pressure of the hydrogen gas supplied in accordance with the pressure change to control the opening and closing of the first intermediate valve 137. .

4 is another preferred embodiment of the present invention, as shown in FIG. 3, three chambers and two in a hydrogen supply assembly including a pressure regulating actuator assembly 210 implemented to enable driving in a failure mode Each hydrogen supply chamber, including a mechanical valve, shows a hydrogen supply assembly connected correspondingly to a multi ejector 220 including three ejectors according to the flow rate.

As shown in FIG. 4, the hydrogen supply chamber structure 230 of the hydrogen supply assembly includes a first chamber 231 leading to an injection channel 234 and a first connection channel 235, and the first chamber 231. And a subchamber (second chamber, third chamber, etc.) formed at a lower portion thereof and connected to each sub connection channel (second connection channel, third connection channel, etc.). That is, the second chamber 232 connected to the second connection passage 236 and the lower side of the second chamber 232 are formed below the first chamber 231 and connected to the third connection passage 237. It is configured to include a third chamber 233. The first chamber 231 and the second chamber 232 have the same structure as shown in FIG. 3, but at the lower end of the second chamber 232, a second connection hole 239 through the third chamber 233 is provided. Is formed, and the second connection hole 239 is connected to the second intermediate valve 241 according to the pressure set in the second chamber 232 through the second intermediate valve 241 disposed in the third chamber 233. ) Is opened and closed to supply hydrogen gas to the third ejector 223 through the third chamber 233 and the third connection passage 237.

The second intermediate valve 241 may be configured of the same mechanical valve as the first intermediate valve 240 corresponding to the first connection hole 238. That is, the second intermediate valve 241 is configured as an NC (Normally closed) valve including a valve seat corresponding to the second connection hole 239 and a spring to enable vertical movement of the valve seat. In response to a predetermined pressure value set in the second chamber 232, when the pressure in the second chamber 232 is sufficiently increased, the second intermediate valve 241 is opened to hydrogen in the second chamber 232. Gas may be configured to be transferred to the third chamber 233.

In this case, when the spring constant of the first intermediate valve is k1 and the spring constant of the second intermediate valve is k2, the spring constant of the second intermediate valve is sufficiently large so that k1 < After the opening of the first intermediate valve, when the higher pressure is formed in the second chamber according to the large load demand for high flow operation, the second intermediate valve is configured to be opened.

The third ejector 223 is configured to have the largest nozzle neck than the first ejector 221 and the second ejector 222, and according to the opening of the second intermediate valve 241, the third chamber 233. And when hydrogen gas flows into the third connection passage 237, hydrogen gas is supplied to the fuel cell stack through the third ejector 223.

Although not shown in the drawings, the hydrogen supply assembly of the present invention may be configured to include N (N≥3) chambers, N-1 mechanical valves, and N ejectors to implement a hydrogen recycling system with improved performance. It will be apparent to those skilled in the art that the present invention belongs.

Such a hydrogen supply chamber structure of a hydrogen supply assembly including a plurality of chambers or the like may be configured in series or in parallel as shown in FIG. 5 or FIG. 6.

FIG. 5 illustrates a series hydrogen supply chamber structure 300 of the present invention, in which a second chamber 320 is formed below the first chamber 310 and a lower portion of the second chamber 320. The third chamber 330 is formed in the configuration so that the intermediate valve of each chamber is opened and closed in accordance with the pressure change in the chamber.

In addition, as shown in FIG. 6, the parallel hydrogen supply chamber structure 400 of the present invention is illustrated, in which case, the second chamber 420 and the third chamber (parallel to the lower portion of the first chamber 410) are shown. 430 and the fourth chamber 440 may be disposed, and each chamber may include a connection hole to each chamber formed in the first chamber 410 and intermediate valves corresponding thereto. At this time, the spring constant of each of the springs included in the intermediate valve is set to have an appropriate value according to the nozzle neck size of the ejector, it is formed so that the opening and closing sequentially according to the pressure increase in the chamber.

The hydrogen supply chamber structure using the mechanical valve for the multi ejector of the hydrogen recirculation system of the present invention configured as described above and the hydrogen supply assembly including the same are operated by the mechanical valve having proper fuel supply performance and fuel recirculation performance according to the required load of the system. A hydrogen supply assembly can be implemented for multiple ejectors.

While the invention has been described with reference to the preferred embodiments, those skilled in the art will appreciate that modifications and variations of the elements of the invention may be made without departing from the scope of the invention. In addition, many modifications may be made to particular circumstances or materials without departing from the essential scope of the invention. Therefore, the invention is not limited to the details of the preferred embodiments of the invention, but will include all embodiments within the scope of the appended claims.

1 is a schematic configuration diagram of a fuel cell system including a hydrogen recycling system of a fuel cell vehicle;

2 is a cross-sectional view of a hydrogen supply assembly including a hydrogen supply chamber structure using a mechanical valve according to the present invention.

3 and 4 are cross-sectional views of a hydrogen supply assembly including a hydrogen supply chamber structure using a mechanical valve according to the present invention with a pressure regulating actuator assembly.

5 is a perspective perspective view of the tandem hydrogen supply chamber structure of the present invention.

6 is a perspective perspective view of a parallel hydrogen supply chamber structure of the present invention.

<Description of Symbols Used in Main Parts of Drawings>

110: pressure regulating actuator assembly 134: first connection passage

120: multi ejector 135: second connection euro

130: hydrogen supply chamber structure 136: first connection hole

131: first chamber 137: mechanical valve

132: second chamber 138: pressure transducer

133: injection path

Claims (8)

A hydrogen supply chamber using a multi ejector, An injection passage through which hydrogen gas is introduced; A first chamber connected to the injection passage to communicate with the first ejector; At least one auxiliary chamber connected to the first chamber and connected to a corresponding ejector; At least one mechanical valve configured to open and close according to a pressure change in the first chamber or the auxiliary chamber; Hydrogen supply chamber using a multi ejector, characterized in that made. The hydrogen supply chamber of claim 1, wherein the at least one auxiliary chamber is provided with at least one connection hole corresponding to the at least one mechanical valve in each of the auxiliary chambers. The hydrogen supply chamber of claim 1, wherein the at least one auxiliary chamber is a series type configured in series in a vertical direction under the first chamber. The hydrogen supply chamber of claim 1, wherein the one or more auxiliary chambers are in parallel type configured in parallel in a horizontal direction under the first chamber. The hydrogen supply chamber according to any one of claims 1 to 4, wherein each of the one or more mechanical valves is an NC (Normally closed) valve composed of a valve seat and a spring. The method of claim 5, wherein the first chamber further comprises a pressure transducer for measuring the pressure in the chamber and the control means for adjusting the pressure of the hydrogen gas flowing in accordance with the measured pressure and the required load in the chamber. Hydrogen supply chamber using a multi ejector. 6. The method according to claim 5, wherein the spring constant of the one or more mechanical valves has a larger spring constant as the nozzle neck size of each ejector connected to the corresponding one or more subchambers increases, so that the mechanical valve is sequential with increasing pressure. Hydrogen supply chamber using a multi ejector, characterized in that to open to. Comprising a hydrogen supply chamber using the multi ejector of claim 1, Connected to the hydrogen supply chamber structure, A pressure regulating actuator assembly for controlling and supplying pressure of hydrogen gas; A multi ejector having a plurality of ejectors; A hydrogen supply assembly comprising a hydrogen supply chamber using a multi ejector, characterized in that comprises.

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