EP4423828A1 - Drosselklappenstellereinheit, brennstoffzellensystem mit einer derartigen drosselklappenstellereinheit und kraftfahrzeug mit einem derartigen brennstoffzellensystem - Google Patents
Drosselklappenstellereinheit, brennstoffzellensystem mit einer derartigen drosselklappenstellereinheit und kraftfahrzeug mit einem derartigen brennstoffzellensystemInfo
- Publication number
- EP4423828A1 EP4423828A1 EP22803208.2A EP22803208A EP4423828A1 EP 4423828 A1 EP4423828 A1 EP 4423828A1 EP 22803208 A EP22803208 A EP 22803208A EP 4423828 A1 EP4423828 A1 EP 4423828A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid channel
- throttle valve
- section
- channel section
- valve actuator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
-
- 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
Definitions
- Throttle valve positioner unit fuel cell system with such a throttle valve positioner unit and motor vehicle with such a fuel cell system
- the invention relates to a throttle valve positioner unit according to the preamble of claim 1.
- the invention also relates to a fuel cell system with such a throttle valve positioner unit.
- the invention also relates to a motor vehicle with such a fuel cell system.
- throttle valve actuators are used to regulate the air supply to the fuel cell stack of the fuel cell system.
- a first fluid channel leads into the fuel cell stack
- a second fluid channel leads out of the fuel cell stack.
- a first throttle valve actuator on the air inlet side
- a second and a third throttle valve actuator in series with one another on the air outlet side.
- the second throttle valve actuator is designed to open or close the second fluid channel
- the third throttle valve actuator is designed to set the desired pressure in the second fluid channel. It would be desirable to combine the functions of the second and third throttle actuators into a single throttle actuator to achieve cost savings.
- the requirements for the second and third throttle actuator are opposed to each other.
- the third throttle valve actuator is on it designed to close the second fluid channel as tightly as possible in the closed position of the throttle valve and to provide the lowest possible pressure loss in the open position.
- the publication DE 10 2010 051 429 A1 relates to a throttle valve actuator.
- a throttle valve actuator unit which, on the one hand, enables the most precise possible regulation of the pressure and, on the other hand, the lowest possible pressure loss in the open position of the throttle valve and the highest possible sealing effect in the closed position of the throttle valve.
- a second object of the present invention is to provide a fuel cell system with such a throttle valve actuator unit.
- a third object is to provide a motor vehicle with such a fuel cell system.
- the first object is achieved by a device having the features of claim 1.
- the first object is achieved by a throttle valve actuator unit with a throttle valve actuator, which has a throttle valve that can be adjusted by an electric motor, and a fluid channel, the fluid channel having a first and a second fluid channel section, the first fluid channel section having a flow cross section that can be changed by the throttle valve , wherein the second fluid channel section has a geometry that adjusts a pressure drop of a fluid flowing through the fluid channel, solved.
- the throttle valve actuator unit according to the invention ensures that the fluid channel is closed as fluid-tight as possible when the throttle valve of the throttle valve actuator of the throttle valve actuator unit is in a closed position, while the lowest possible pressure losses occur in an open position of the throttle valve of the throttle valve actuator of the throttle valve actuator unit.
- the throttle valve actuator unit due to the geometry of the second fluid channel section, in particular with small flow cross sections or small opening angles of the throttle valve, to adjust the pressure in the fluid channel as precisely as possible, since due to the geometry of the second fluid channel section, a greater movement of the throttle valve for a certain pressure difference is necessary than would be necessary without this geometry.
- the geometry of the second fluid channel section is designed such that with an opening movement of the throttle valve of less than 30°, relative to a position in which the throttle valve closes the variable flow cross section, only a disproportionately low pressure increase downstream of the throttle valve can be caused.
- the disproportionality refers in particular to a pressure increase that can be caused by an opening movement of the throttle valve of more than 30°, based on a position in which the throttle valve closes the variable flow cross section.
- the geometry of the second fluid channel section is designed such that an opening movement of the throttle valve up to a flow cross section that corresponds to 20% of the maximum, variable flow cross section only causes a disproportionately low pressure increase downstream of the throttle valve.
- the sub-proportionality refers in particular to a pressure increase that can be caused downstream of the throttle valve at a flow cross section that corresponds to 50% to 100% of the maximum, variable flow cross section.
- the throttle valve positioner unit and/or the throttle valve positioner is preferably a throttle valve positioner unit or a throttle valve positioner for a fuel cell system.
- the Throttle valve actuator unit or the throttle valve actuator in this case designed according to its area of application and suitable for this purpose.
- the throttle valve positioner unit and the throttle valve positioner can be optimized in terms of suitability and service life for use in a fuel cell system.
- the throttle valve actuator has a throttle valve actuator housing which includes the first and/or the second fluid channel section. It is particularly preferred if the throttle valve actuator housing is designed in one piece with the first and/or the second fluid channel section. As a result, a separate manufacturing process can be dispensed with, which saves costs. At the same time, assembly and a separate connection between the throttle valve actuator housing and one of the fluid channel sections can be dispensed with, which saves further costs. In addition, the joint formation, for example by means of a plastic injection molding or a metal casting process, results in the most precise possible alignment between the throttle valve actuator and the fluid channel sections.
- the throttle valve actuator includes an electric motor, by means of which the throttle valve can be adjusted.
- the electric motor is preferably designed as a mechanically commutated DC motor or as a permanently excited synchronous motor. While the former type of motor is extremely inexpensive, the latter type of motor is extremely durable. Furthermore, it is also conceivable that a stepper motor is used as an electric motor in order to adjust the throttle valve of the throttle valve actuator. In this way, there is no need to detect the position of the throttle valve, which saves further costs.
- the variability of the flow cross section of the first fluid duct section is dependent on the position of the throttle valve in the first fluid duct section.
- the throttle valve actuator includes a shaft via which the electric motor of the throttle valve actuator changes the position of the throttle valve in the first fluid duct section.
- the shaft is non-rotatably connected to the throttle valve. In this case, it is possible for the shaft to emerge from the first fluid channel section at one or two points. This means that the wave radially breaks through the channel wall of the first fluid channel section, which delimits the first fluid channel section. Such a breakthrough is also referred to as the emergence of the wave within the scope of the invention.
- a first exit of the shaft from the first fluid channel section serves to connect the throttle valve to the electric motor of the throttle valve actuator in a drive-transmitting manner.
- this first exit of the shaft from the first fluid channel section can also be used to support the shaft and/or the throttle valve.
- the second exit of the shaft from the first fluid channel section serves only to support the shaft and/or the throttle valve.
- the first fluid channel section has only one outlet of the shaft.
- this outlet of the shaft is used on the one hand to support the shaft and/or the throttle valve and on the other hand to connect the throttle valve to the electric motor of the throttle valve actuator in a drive-transmitting manner.
- an outlet of the shaft or the first and the second outlet of the shaft is located in the plane which is closed by the throttle valve in its closed position.
- an outlet of the shaft is located in front of or behind the plane, seen in the flow direction, which is closed by the throttle valve in its closed position. This prevents the exit of the wave from the first fluid channel section unwanted bypass volume flow.
- both exits of the shaft are located at a distance from the plane which is closed by the throttle valve in its closed position. In other words, it is possible for both exits of the wave to be in front of or behind the plane in the direction of flow. It is also possible for the wave to exit in front of and behind the plane. This prevents unwanted bypass volume flows past the level that is closed by the throttle valve in its closed position, caused by the necessary gap dimensions of the shaft outlets.
- a closed position of the throttle valve of the throttle valve actuator is to be understood as meaning a position of the throttle valve in which the flow cross section of the first fluid channel section is minimal. This does not necessarily mean that the throttle valve closes the first fluid channel section in an absolutely fluid-tight manner. In other words, it is possible that there is an intentional or unintentional bypass volume flow of the flowing fluid, which in the case of an unintentional bypass volume flow is within an acceptable range for the application.
- the open position of the throttle valve means that the throttle valve is in a position in which the flow cross section of the first fluid channel section is at its maximum.
- the flowing fluid is preferably air.
- this is a conveyable flow of fluid or air.
- a preferred exemplary embodiment is characterized in that the second fluid channel section is arranged at a distance from the flow cross section of the first fluid channel section.
- the geometry is through which results in a drop in pressure of a fluid flowing through the fluid duct, is not integrated into the flow cross section of the first fluid duct section, which can be changed by the throttle valve.
- the first fluid channel section is preferably designed to be flow-optimized, ie designed in such a way that the lowest possible pressure losses occur.
- a preferred exemplary embodiment is characterized in that the second fluid channel section is arranged upstream or downstream relative to the first fluid channel section.
- upstream is meant a direction opposite to the flow direction of the flowing fluid
- downstream is meant a direction towards the flow direction of the flowing fluid.
- a further preferred exemplary embodiment is characterized in that the geometry of the second fluid channel section has at least two flow cross sections. It is particularly advantageous if the geometry of the second fluid channel section transitions from a first flow cross section of the second fluid channel section into a second flow cross section of the second fluid channel section in the flow direction of the flowing fluid. It is particularly advantageous here if the second flow cross section of the second fluid channel section is smaller than the first flow cross section of the second fluid channel section.
- the geometry of the second fluid channel section has at least a third flow cross section.
- this third flow cross-section directly adjoins the second flow cross-section in the direction of flow. Furthermore, it is preferable if the third flow cross section is larger than the second flow cross section. In addition, it is very preferred if the third flow cross section corresponds to the first flow cross section. In a further preferred embodiment, a transition from the first flow cross section of the second fluid channel section to the second flow cross section of the second fluid channel section and/or from the second flow cross section of the second fluid channel section to the third flow cross section of the second fluid channel section is designed as an abrupt, i.e. discontinuous, change in flow cross section. This change in flow cross-section relates to the flow direction of the fluid.
- a further preferred exemplary embodiment is characterized in that the second flow cross section of the second fluid channel section is formed by a ring pressed into the second fluid channel section.
- the inner diameter of the ring defines the second flow cross-section of the second fluid channel section, while the outer diameter of the ring is selected such that it causes an interference fit between the ring and the second fluid channel section when the ring is pressed into the second fluid channel section.
- a further preferred exemplary embodiment is characterized in that the geometry of the second fluid channel section corresponds to the geometry of a throttle or an orifice.
- the geometry of the second fluid channel section corresponds to a geometry in which the second flow cross section of the second fluid channel section is smaller than the first flow cross section of the second fluid channel section and the second flow cross section extends over a length in the flow direction of the fluid that is greater than is a or the diameter of the second flow cross-section of the second fluid channel section.
- the geometry of the second fluid channel section corresponds to a geometry in which the second flow cross section of the second fluid channel section is smaller than the first flow cross section of the second Fluid channel section is and the second flow cross section extends over a length in the flow direction of the fluid which is smaller than one or the diameter of the second flow cross section of the second fluid channel section. If the second flow cross section of the second fluid channel section has a circular geometry, in other words only has one diameter, which is preferred, this diameter is to be used for the previous comparison or the previous embodiments relating to the orifice and the throttle.
- the second flow cross-section of the second fluid channel section has a variable diameter along its circumference, a minimum, an average or a maximum diameter of the second flow cross-section of the second fluid channel section for the previous comparisons or the previous embodiments relating to the Aperture and the choke refer to draw on.
- a further preferred exemplary embodiment is characterized in that the fluid channel has a groove at a distance from the flow cross section that can be changed by the throttle valve. It is particularly preferred if the groove runs in the circumferential direction of the fluid channel, ie in particular orthogonally to the direction of flow of the fluid. Furthermore, it is preferred if the groove extends over the full circumference, in other words through 360° in the circumferential direction of the fluid channel. In addition, it is advantageous if the groove is formed at a distance from the flow cross section of the first fluid channel section in the direction of flow. Furthermore, it is advantageous if the first or the second fluid channel section includes the groove. It is particularly advantageous if the groove is designed as a transition from the first fluid channel section to the second fluid channel section.
- the groove is formed at a distance from the geometry of the second fluid channel section or from the second flow cross section of the second fluid channel section counter to the direction of flow of the fluid.
- the groove and its arrangement make it possible for the fluid flowing through the fluid channel to flow through the fluid at a small opening angle of the throttle valve, in other words at a small To put flow cross-sections of the first fluid channel section in turbulence, ie turbulence. This results in a further drop in pressure, which requires greater movement of the throttle valve to adjust a pressure, thus promoting controllability.
- a preferred exemplary embodiment is characterized in that the second fluid channel section is designed separately from the throttle valve actuator.
- the throttle valve actuator can be used without the second fluid channel section.
- the throttle valve actuator is connected to the second fluid channel section in such a way that the first and the second fluid channel section are connected to one another in a fluid-conducting manner, preferably directly or by means of a seal.
- the second fluid channel section is formed separately from the throttle valve and/or the first fluid channel section.
- a preferred exemplary embodiment is characterized in that the first and the second fluid channel section are connected to one another in a fluid-conducting manner and that the second fluid channel section and the throttle valve actuator or the first fluid channel section are fastened to one another directly or indirectly in a materially, form-fitting or non-positive manner.
- This attachment in other words a connection, can take place, for example, by means of a weld, a screw connection, a pipe clamp or a thread. Both the fluid-conducting connection and the attachment can each be designed directly or indirectly, independently of one another.
- a preferred exemplary embodiment is characterized in that the first fluid channel section has the lowest possible pressure drop is flow-optimized.
- the throttle valve positioner with the first fluid channel section ie without the second fluid channel section, can be arranged or used on the air inlet side of a fuel cell stack.
- the second task relating to the provision of a fuel cell system is achieved by a fuel cell system with a fuel cell stack and a throttle valve actuator unit according to the invention, which is arranged on the air outlet side of the fuel cell stack.
- a preferred exemplary embodiment is characterized in that a further throttle valve actuator, which is similar to the first throttle valve actuator of the throttle actuator unit, is arranged on the air inlet side of the fuel cell stack.
- a further throttle valve actuator which is similar to the first throttle valve actuator of the throttle actuator unit, is arranged on the air inlet side of the fuel cell stack.
- the further throttle valve actuator is the same as the first throttle valve actuator belonging to the throttle valve actuator unit means that it is the same model, so that different throttle valve actuators do not have to be produced.
- a motor vehicle with such a fuel cell system.
- a motor vehicle which includes a fuel cell system according to the invention. This creates an inexpensive motor vehicle.
- FIG. 1 shows a motor vehicle with a fuel cell system and a throttle valve actuator unit according to the invention
- FIG. 1 shows a motor vehicle 1 which includes a fuel cell system 2 .
- the fuel cell system 2 has a radial compressor 3 through which an air flow can be conveyed to a fuel cell stack 5 .
- a throttle valve actuator 4 is arranged on the air inlet side to the fuel cell stack 5 in a fluid-conducting manner.
- the throttle valve positioner 4 corresponds to a further throttle valve positioner which is arranged as part of a throttle valve positioner unit 7 on the air outlet side of the fuel cell stack 5 .
- the throttle valve actuator unit 7 differs from the throttle valve actuator 4 in that the
- Throttle actuator unit 7 compared to the throttle actuator 4 one comprises a second fluid channel section, which has a geometry that adjusts a pressure drop in a fluid that flows or can be pumped through the fluid channel. Electricity can be generated by the fuel cell stack 5 and can be used to drive the motor vehicle 1 by means of an inverter and an electric motor drive 6 .
- FIG. 2a shows an embodiment of the throttle valve actuator unit 7 according to the invention, as it is arranged on the air outlet side of the fuel cell stack in FIG.
- Throttle valve positioner unit 7 includes a throttle valve positioner 4 and a second fluid channel section 8b, which has through bores 9 that correspond to bores in throttle valve positioner 4, so that the first fluid channel section can be fluidly connected to second fluid channel section 8b, in that second fluid channel section 8b communicates with throttle valve positioner 4 a screw connection, for which the bores 9 are provided, is fastened.
- FIG. 2b shows a sectional view through the throttle valve actuator unit 7 from FIG. 2a.
- the section here runs along the direction of flow of a fluid that can be conveyed through the throttle valve actuator unit 7 .
- a throttle valve 14 can be seen, which can be adjusted from a closed position to an open position via a shaft 13a.
- the shaft 13a emerges from the first fluid channel section 8a at an outlet 13b in order to be drive-connected to an electric motor of the throttle valve actuator of the throttle valve actuator unit 7 .
- the second fluid channel section 8b directly adjoins the first fluid channel section 8a in a fluid-conducting manner.
- the geometry of the second fluid channel section 8b comprises a first flow cross section 10 of the second fluid channel section 8b, a second flow cross section 11 of the second fluid channel section 8b and a third flow cross section 12 of the second fluid channel section 8b, which follow one another directly in the direction of flow.
- the magnitude of the first flow cross section 10 of the second fluid channel section 8b corresponds to the third flow cross section 12 of the second fluid channel section 8b, with the second flow cross section 11 of the second fluid channel section 8b being smaller than the other two flow cross sections 10, 12 of the second fluid channel section 8b.
- the transitions of the individual flow cross sections 10, 11, 12 of the second fluid channel section 8b in leaps and bounds, in other words discontinuous.
- FIG 3 shows a flow simulation of an air flow 16 in the flow direction 17 of the air flow 16 flowing through the throttle valve actuator unit.
- the throttle valve 14 is arranged in the first fluid channel section 8a and is in a position which is only a small angle from a closed position of the throttle valve 14 differs. It can be seen that the shaft 13a, which is drivingly connected to the throttle valve 14, is located behind the throttle valve 14 in the direction of flow 17. Due to the position of the throttle flap 14, the air stream 16 flows along the wall of the first fluid channel section 8a, is swirled through the groove 15 and flows in the second fluid channel section 8b against a change in flow cross section in the form of a transition from the first to the second flow cross section 10, 11 of the second fluid channel section 8b.
- the throttle valve 14 must be opened by a larger angle than would be necessary without the second fluid channel section with its geometry , so that a noticeable increase in pressure downstream of the throttle valve, for example in the third flow cross section 12 of the second fluid channel section 8b, can be measured. Therefore, the same throttle valve positioner can be used on the air inlet side and air outlet side in relation to a fuel cell stack, the air outlet side throttle valve positioner being designed in the form of the throttle valve positioner unit according to the invention.
- FIGS. 1 to 3 are not restrictive and serve to clarify the idea of the invention. reference list
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Valve Housings (AREA)
- Fuel Cell (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21465555 | 2021-10-26 | ||
| DE102021212202.7A DE102021212202A1 (de) | 2021-10-26 | 2021-10-28 | Drosselklappenstellereinheit, Brennstoffzellensystem mit einer derartigen Drosselklappenstellereinheit und Kraftfahrzeug mit einem derartigen Brennstoffzellensystem |
| PCT/EP2022/078701 WO2023072636A1 (de) | 2021-10-26 | 2022-10-14 | Drosselklappenstellereinheit, brennstoffzellensystem mit einer derartigen drosselklappenstellereinheit und kraftfahrzeug mit einem derartigen brennstoffzellensystem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4423828A1 true EP4423828A1 (de) | 2024-09-04 |
Family
ID=84358616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22803208.2A Pending EP4423828A1 (de) | 2021-10-26 | 2022-10-14 | Drosselklappenstellereinheit, brennstoffzellensystem mit einer derartigen drosselklappenstellereinheit und kraftfahrzeug mit einem derartigen brennstoffzellensystem |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240421330A1 (de) |
| EP (1) | EP4423828A1 (de) |
| JP (1) | JP2024540048A (de) |
| WO (1) | WO2023072636A1 (de) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5572979A (en) * | 1995-07-05 | 1996-11-12 | Ford Motor Company | Engine air induction system |
| JP5189063B2 (ja) | 2009-11-16 | 2013-04-24 | 愛三工業株式会社 | 回転角検出装置及びスロットル制御装置 |
| DK2751454T3 (en) * | 2011-11-01 | 2017-05-22 | Ab Somas Ventiler | Butterfly valve |
| GB2530094A (en) * | 2014-09-15 | 2016-03-16 | Intelligent Energy Ltd | Valve assembly |
| DE102014226724A1 (de) * | 2014-12-19 | 2016-06-23 | Continental Automotive Gmbh | Ventilvorrichtung in einem Kraftfahrzeug |
| JP6822296B2 (ja) * | 2017-04-20 | 2021-01-27 | トヨタ自動車株式会社 | 燃料電池システム |
| IT201800003347A1 (it) * | 2018-03-07 | 2019-09-07 | Magneti Marelli Spa | Valvola a farfalla per un motore a combustione interna con la possibilita' di regolare la posizione di limp-home e relativo metodo di regolazione della posizione di limp-home |
| EP3800716B1 (de) * | 2019-10-03 | 2022-05-04 | Marelli Europe S.p.A. | Drosselklappe zur einstellung der zufuhr eines gases zu einer brennstoffzelle und elektrisch angetriebenes fahrzeug mit der drosselklappe |
| JP7114548B2 (ja) * | 2019-10-04 | 2022-08-08 | 本田技研工業株式会社 | 燃料電池車両 |
| CN112747156B (zh) * | 2021-01-12 | 2022-10-14 | 北京卫星制造厂有限公司 | 一种高精度大减压比自动调压的气体稳压减压组合阀 |
| CN113154093A (zh) * | 2021-04-01 | 2021-07-23 | 西安交通大学 | 一种并联节流阀 |
-
2022
- 2022-10-14 WO PCT/EP2022/078701 patent/WO2023072636A1/de not_active Ceased
- 2022-10-14 JP JP2024525196A patent/JP2024540048A/ja active Pending
- 2022-10-14 US US18/704,589 patent/US20240421330A1/en active Pending
- 2022-10-14 EP EP22803208.2A patent/EP4423828A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20240421330A1 (en) | 2024-12-19 |
| WO2023072636A1 (de) | 2023-05-04 |
| JP2024540048A (ja) | 2024-10-31 |
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