CN115614255B - Integrated valve injection type hydrogen circulating pump - Google Patents
Integrated valve injection type hydrogen circulating pump Download PDFInfo
- Publication number
- CN115614255B CN115614255B CN202211306908.6A CN202211306908A CN115614255B CN 115614255 B CN115614255 B CN 115614255B CN 202211306908 A CN202211306908 A CN 202211306908A CN 115614255 B CN115614255 B CN 115614255B
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- Prior art keywords
- ejector
- seat
- valve
- hydrogen
- integrated
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 72
- 239000001257 hydrogen Substances 0.000 title claims abstract description 72
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 238000002347 injection Methods 0.000 title claims abstract description 8
- 239000007924 injection Substances 0.000 title claims abstract description 8
- 238000009792 diffusion process Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 229910052755 nonmetal Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 10
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 description 4
- 230000010354 integration Effects 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/121—Casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/125—Cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling of the reactants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04104—Regulation of differential pressures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Sustainable Energy (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The utility model provides an integrated valve injection type hydrogen circulating pump, includes the hydrogen circulating pump, and the booster cavity casing of hydrogen circulating pump is connected with integrated apron, and integrated apron includes integrated casing, integrated casing rear side is equipped with the hydrogen pump apron of being connected with booster cavity casing, and the front side is equipped with the valve seat, the bottom of valve seat and hydrogen pump apron is equipped with the ejector seat, be equipped with air inlet and gas vent on the hydrogen pump apron, be equipped with the low pressure suction chamber that is linked together with the gas vent in the ejector seat, the low pressure suction intracavity is equipped with high-pressure nozzle, ejector seat rear side can be dismantled through the screw and is connected with the ejector body, this internal mixing chamber and the diffusion chamber that is linked together with the low pressure suction chamber of being equipped with of ejector. The integrated level is high, and occupation space is little, and transmission distance is near, has reduced the loss in the transmission process, has improved transmission efficiency, and ejector body and ejector seat can be dismantled and are connected moreover, are convenient for change the ejector body of different models according to the demand, satisfy the pressure boost demand of different grades.
Description
Technical field:
the invention relates to an integrated valve injection type hydrogen circulating pump.
The background technology is as follows:
at present, the development of new energy fuel cell automobiles is considered as an important link of traffic energy power transformation, and in order to ensure the normal operation of fuel cell engines, the fuel cell engines generally need auxiliary systems such as a hydrogen supply subsystem, an air supply subsystem, a circulating water cooling management subsystem and the like.
In a fuel cell hydrogen supply subsystem, a hydrogen circulating pump and an ejector can be mutually matched to realize the pressurization of hydrogen, at present, the hydrogen circulating pump and the ejector are generally connected through pipelines, the integration degree is low, the occupied space is large, the transmission distance is long, the loss can be generated in the transmission process, the transmission efficiency is reduced, and although the theoretical concept of integrating some hydrogen circulating pumps and ejectors appears in recent years, no specific structural design exists, and the hydrogen circulating pump and the ejector cannot be directly applied to specific structures; in addition, the front side of the ejector can be connected with a hydrogen source, a switching valve and a proportional valve are arranged on a pipeline between the hydrogen source and the ejector, the switching valve, the proportional valve and the ejector are also arranged in a split mode, field installation is complex, and a structure for integrating a hydrogen circulating pump, the switching valve, the proportional valve and the ejector at the same time does not exist at present.
In summary, the integration problem of the hydrogen circulating pump with the ejector, the switching valve and the proportional valve has become a technical problem to be solved in industry.
The invention comprises the following steps:
the invention provides an integrated valve injection type hydrogen circulating pump for overcoming the defects of the prior art, and solves the problems of low integration degree, large occupied space and complex field installation of the traditional hydrogen circulating pump, an injector, a switch valve and a proportional valve.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides an integrated valve injection type hydrogen circulating pump, includes the hydrogen circulating pump, the booster cavity casing of hydrogen circulating pump is connected with integrated apron, integrated apron includes integrated casing, integrated casing rear side is equipped with the hydrogen pump apron of being connected with the booster cavity casing, and the front side is equipped with the valve seat, the bottom of valve seat and hydrogen pump apron is equipped with the ejector seat, be equipped with air inlet and gas vent on the hydrogen pump apron, be equipped with the low pressure suction chamber that is linked together with the gas vent in the ejector seat, be equipped with high-pressure nozzle in the low pressure suction chamber, ejector seat rear side is connected with the ejector body through the screw can be dismantled, be equipped with the mixing chamber and the diffusion chamber that are linked together with low pressure suction chamber in the ejector body; the valve seat is provided with a switching valve and a proportional valve, a horizontal channel which is used for communicating the switching valve with the proportional valve is arranged in the valve seat, one side of the switching valve is provided with a hydrogen inlet, and one side of the proportional valve is communicated with the low-pressure suction cavity through a U-shaped channel.
The ejector body is provided with a connecting flange, and a plurality of screws penetrate through the connecting flange to connect the ejector body with the ejector seat.
The front end of the ejector body is inserted into the ejector seat, and a plurality of annular grooves are arranged between the ejector body and the ejector seat for sealing.
The U-shaped channel is arranged in the buckle cover, and the buckle cover is fixedly connected with the valve seat and the ejector seat through a plurality of screws.
And sealing structures are arranged between the buckle cover and the valve seat as well as between the buckle cover and the ejector seat.
The buckling cover and the valve seat are sealed through a sealing ring, and the buckling cover and the ejector seat are sealed through a plurality of annular grooves.
And a pressure sensor and a pressure discharge valve are arranged on the ejector body at positions corresponding to the diffusion cavities.
The hydrogen pump cover plate, the ejector seat and the valve seat are integrally formed by metal materials or nonmetal materials.
The invention adopts the scheme and has the following advantages:
through setting up integrated casing, carry out structural design to integrated casing, with hydrogen pump apron, valve seat, ejector seat all integrate in integrated casing to integrate hydrogen circulating pump and ejector, ooff valve and proportional valve in an organic whole, integrated level is high, and occupation space is little, and transmission distance is near, has reduced the loss in the transmission process, has improved transmission efficiency, and ejector body and ejector seat can dismantle and be connected moreover, are convenient for change the ejector body of different models according to the demand, satisfy the pressure boost demand of different grades.
Description of the drawings:
fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic top view of the present invention.
FIG. 3 is a schematic view of the cross-sectional structure A-A of FIG. 2.
Fig. 4 is a schematic view of the cross-sectional structure of B-B in fig. 2.
FIG. 5 is a schematic view of the front side three-dimensional structure of the present invention with the hydrogen circulation pump, the on-off valve and the proportional valve removed.
FIG. 6 is a schematic view of the rear side perspective of the present invention with the hydrogen circulation pump, on-off valve and proportional valve removed.
In the figure, 1, a hydrogen pump cover plate, 2, a valve seat, 3, an injector seat, 4, an air inlet, 5, an air outlet, 6, a low-pressure suction cavity, 7, a switch valve mounting groove, 8, a proportional valve mounting groove, 9, a horizontal channel, 10, a hydrogen inlet, 11, a U-shaped channel, 12, a buckle closure, 13, a sealing ring, 14, an annular groove, 15, a high-pressure nozzle, 16, an injector body, 17, a mixing cavity, 18, a diffusion cavity, 19, a connecting flange, 20, a pressure sensor, 21, a pressure discharge valve, 22, a hydrogen circulating pump, 23, a switch valve, 24 and a proportional valve.
The specific embodiment is as follows:
in order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in fig. 1-6, an injection type hydrogen circulating pump with an integrated valve comprises a hydrogen circulating pump 22, wherein a pressurizing cavity shell of the hydrogen circulating pump 22 is connected with an integrated cover plate, the integrated cover plate comprises an integrated shell, a hydrogen pump cover plate 1 connected with the pressurizing cavity shell is arranged on the rear side of the integrated shell, a valve seat 2 is arranged on the front side of the integrated shell, an injector seat 3 is arranged at the bottoms of the valve seat 2 and the hydrogen pump cover plate 1, an air inlet 4 and an air outlet 5 are arranged on the hydrogen pump cover plate 1, a low-pressure suction cavity 6 communicated with the air outlet 5 is arranged in the injector seat 3, a high-pressure nozzle 15 is arranged in the low-pressure suction cavity 6, an injector body 16 is detachably connected on the rear side of the injector seat 3 through screws, and a mixing cavity 17 and a diffusion cavity 18 communicated with the low-pressure suction cavity 6 are arranged in the injector body 16; the valve seat 2 is provided with a switch valve mounting groove 7 and a proportional valve mounting groove 8 for mounting a switch valve 23 and a proportional valve 24, a horizontal channel 9 for communicating the switch valve 23 with the proportional valve 24 is arranged in the valve seat 2, one side of the switch valve 23 is provided with a hydrogen inlet 10, the hydrogen inlet 10 is used for being connected with a hydrogen source, a sintering filter element can be placed in the hydrogen inlet 10 to play a role in filtering new hydrogen, and one side of the proportional valve 24 is communicated with the low-pressure suction cavity 6 through a U-shaped channel 11.
Be equipped with flange 19 on the ejector body 16, a plurality of screw passes flange 19 and is connected ejector body 16 and ejector seat 3, conveniently dismantles, is convenient for change the ejector body 16 of different models according to the demand.
The front end of the ejector body 16 is inserted into the ejector seat 3, and a plurality of annular grooves 14 are formed between the ejector body 16 and the ejector seat 3 to form a labyrinth structure for sealing so as to prevent gas from leaking outwards.
The U-shaped channel 11 is arranged in the buckle cover 12, so that the U-shaped channel 11 is convenient to process and mold, and the buckle cover 12 is fixedly connected with the valve seat 2 and the ejector seat 3 through a plurality of screws.
Sealing structures are arranged between the buckle cover 12 and the valve seat 2 and between the buckle cover and the injector seat 3 so as to prevent gas from leaking outwards.
The buckling cover 12 and the valve seat 2 are sealed through a sealing ring 13, and the buckling cover 12 and the injector seat 3 are sealed through a plurality of annular grooves 14 to form a labyrinth structure.
The ejector body 16 is provided with a pressure sensor 20 and a pressure discharge valve 21 at positions corresponding to the diffusion cavity 18, the pressure sensor 20 can detect pressure signals in the diffusion cavity 18, and when the pressure is overlarge, the pressure discharge valve 21 can be opened to discharge air so as to keep the pressure of gas in the diffusion cavity 18 within a controllable range.
The hydrogen pump cover plate 1, the ejector seat 3 and the valve seat 2 are integrally formed by metal materials or nonmetal materials.
Working principle:
when in use, the invention is arranged on the pressurizing cavity shell of the hydrogen circulating pump 22, when the hydrogen pump runs, gas enters from the air inlet 4 of the hydrogen pump cover plate 1, after the hydrogen circulating pump 22 is pressurized, the gas is discharged into the low-pressure suction cavity 6 of the ejector seat 3 from the air outlet 5 of the hydrogen pump cover plate 1; the hydrogen of the hydrogen source enters a switch valve 23 in a switch valve mounting groove 7 from a hydrogen inlet 10 of a valve seat 2 and is used for controlling the on-off of a hydrogen path, then enters a proportional valve 24 in a proportional valve mounting groove 8 through a horizontal channel 9 and is used for controlling the flow of the hydrogen path, and then enters a low-pressure suction cavity 6 of the ejector seat 3 through a U-shaped channel 11 of a buckle cover 12; the gas in the low pressure suction chamber 6 is finally discharged outwards through the mixing chamber 17 and the diffusion chamber 18 in the ejector body 16.
The above embodiments are not to be taken as limiting the scope of the invention, and any alternatives or modifications to the embodiments of the invention will be apparent to those skilled in the art and fall within the scope of the invention.
The present invention is not described in detail in the present application, and is well known to those skilled in the art.
Claims (5)
1. An integrated valve injection type hydrogen circulating pump which is characterized in that: the hydrogen circulating pump comprises a hydrogen circulating pump, wherein a pressurizing cavity shell of the hydrogen circulating pump is connected with an integrated cover plate, the integrated cover plate comprises an integrated shell, a hydrogen pump cover plate connected with the pressurizing cavity shell is arranged on the rear side of the integrated shell, a valve seat is arranged on the front side of the integrated shell, ejector seats are arranged at the bottoms of the valve seat and the hydrogen pump cover plate, an air inlet and an air outlet are arranged on the hydrogen pump cover plate, a low-pressure suction cavity communicated with the air outlet is arranged in the ejector seats, a high-pressure nozzle is arranged in the low-pressure suction cavity, an ejector body is detachably connected to the rear side of the ejector seat through screws, and a mixing cavity and a diffusion cavity communicated with the low-pressure suction cavity are arranged in the ejector body; the valve seat is provided with a switching valve and a proportional valve, a horizontal channel for communicating the switching valve with the proportional valve is arranged in the valve seat, one side of the switching valve is provided with a hydrogen inlet, and one side of the proportional valve is communicated with the low-pressure suction cavity through a U-shaped channel;
the U-shaped channel is arranged in the buckle cover, the buckle cover is fixedly connected with the valve seat and the ejector seat through a plurality of screws, sealing structures are arranged between the buckle cover and the valve seat as well as between the buckle cover and the ejector seat, the buckle cover and the valve seat are sealed through sealing rings, and the buckle cover and the ejector seat are sealed through a plurality of annular grooves.
2. An integrated valve ejector hydrogen circulation pump according to claim 1, wherein: the ejector body is provided with a connecting flange, and a plurality of screws penetrate through the connecting flange to connect the ejector body with the ejector seat.
3. An integrated valve ejector hydrogen circulation pump according to claim 1, wherein: the front end of the ejector body is inserted into the ejector seat, and a plurality of annular grooves are arranged between the ejector body and the ejector seat for sealing.
4. An integrated valve ejector hydrogen circulation pump according to claim 1, wherein: and a pressure sensor and a pressure discharge valve are arranged on the ejector body at positions corresponding to the diffusion cavities.
5. An integrated valve ejector hydrogen circulation pump according to claim 1, wherein: the hydrogen pump cover plate, the ejector seat and the valve seat are integrally formed by metal materials or nonmetal materials.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211306908.6A CN115614255B (en) | 2022-10-24 | 2022-10-24 | Integrated valve injection type hydrogen circulating pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211306908.6A CN115614255B (en) | 2022-10-24 | 2022-10-24 | Integrated valve injection type hydrogen circulating pump |
Publications (2)
Publication Number | Publication Date |
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CN115614255A CN115614255A (en) | 2023-01-17 |
CN115614255B true CN115614255B (en) | 2023-08-29 |
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Application Number | Title | Priority Date | Filing Date |
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CN202211306908.6A Active CN115614255B (en) | 2022-10-24 | 2022-10-24 | Integrated valve injection type hydrogen circulating pump |
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CN (1) | CN115614255B (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100024844A (en) * | 2008-08-26 | 2010-03-08 | 현대제철 주식회사 | Air dry device and control method thereof |
CN112864419A (en) * | 2021-03-15 | 2021-05-28 | 烟台东德实业有限公司 | Hydrogen circulating pump and ejector series integrated fuel cell hydrogen supply system |
CN217334152U (en) * | 2022-02-08 | 2022-08-30 | 佛山市清极能源科技有限公司 | Injection reflux device for hydrogen circulation of fuel cell |
-
2022
- 2022-10-24 CN CN202211306908.6A patent/CN115614255B/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100024844A (en) * | 2008-08-26 | 2010-03-08 | 현대제철 주식회사 | Air dry device and control method thereof |
CN112864419A (en) * | 2021-03-15 | 2021-05-28 | 烟台东德实业有限公司 | Hydrogen circulating pump and ejector series integrated fuel cell hydrogen supply system |
CN217334152U (en) * | 2022-02-08 | 2022-08-30 | 佛山市清极能源科技有限公司 | Injection reflux device for hydrogen circulation of fuel cell |
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CN115614255A (en) | 2023-01-17 |
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PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: An integrated valve injection hydrogen circulation pump Granted publication date: 20230829 Pledgee: Qingdao Rural Commercial Bank Co.,Ltd. Yantai Branch Pledgor: YANTAI DONGDE INDUSTRIAL Co.,Ltd. Registration number: Y2024980007136 |
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PE01 | Entry into force of the registration of the contract for pledge of patent right |