CN220319959U - Double ejector assembly suitable for different working conditions - Google Patents
Double ejector assembly suitable for different working conditions Download PDFInfo
- Publication number
- CN220319959U CN220319959U CN202322051430.3U CN202322051430U CN220319959U CN 220319959 U CN220319959 U CN 220319959U CN 202322051430 U CN202322051430 U CN 202322051430U CN 220319959 U CN220319959 U CN 220319959U
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- China
- Prior art keywords
- shell
- ejector
- valve
- cavity
- air outlet
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- 239000001257 hydrogen Substances 0.000 claims abstract description 51
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 51
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 238000009792 diffusion process Methods 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 6
- 230000009977 dual effect Effects 0.000 claims 9
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 22
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 6
- 150000002431 hydrogen Chemical class 0.000 description 2
- 230000005465 channeling Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
Abstract
The utility model relates to the technical field of fuel cells, in particular to a double ejector assembly suitable for different working conditions. The device comprises an ejector shell, wherein a first ejector and a second ejector are arranged in the ejector shell, the side part of the front end of the ejector shell is connected with an air inlet shell, an air inlet cavity is arranged in the air inlet shell, and a hydrogen return inlet is arranged on the air inlet shell; the front end part of the ejector shell is connected with a valve shell, a new hydrogen channel is arranged in the valve shell, a switching valve for controlling the new hydrogen channel, a first proportional valve and a second proportional valve are sequentially arranged on the valve shell, and a new hydrogen inlet is arranged on the valve shell; the rear end of the ejector shell is connected with an air outlet shell, an air outlet cavity is arranged in the air outlet shell, and an air outlet is arranged on the air outlet shell. When the fuel cell system is operated, only the first proportional valve and the second proportional valve are required to be controlled, so that the pressure requirements of the fuel cell system under different working conditions can be met. The fuel cell system is free from repeated disassembly and assembly, time-saving and labor-saving, high in whole double-injection integration level and convenient to install with the fuel cell system.
Description
Technical field:
the utility model relates to the technical field of fuel cells, in particular to a double ejector assembly suitable for different working conditions.
The background technology is as follows:
in a fuel cell hydrogen path circulation system, an ejector is commonly used for pressurizing hydrogen-containing gas in a circulation loop, and for a single ejector, the pressurization requirement in a fixed working condition range can be met. The fuel cell system is divided into large, medium and small different working conditions according to the power, different ejectors are required to be matched under different working conditions, and the single ejectors cannot simultaneously meet the pressure requirements of the fuel cell system under different working conditions, so that ejectors with different specifications can be replaced according to the working conditions at present, the disassembly and assembly are troublesome, the efficiency is low, and the use requirements of a hydrogen path circulation system of a fuel cell cannot be met.
In summary, in the field of fuel cells, the above-mentioned problems of ejectors have become a technical problem to be solved in the industry.
The utility model comprises the following steps:
the utility model provides a double ejector assembly suitable for different working conditions, and solves the problem that a single ejector can not meet the pressure requirements of a fuel cell system under different working conditions at the same time in the past.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the double-ejector assembly suitable for different working conditions comprises an ejector shell, wherein a first ejector and a second ejector are arranged in the ejector shell side by side, the first ejector comprises a first low-pressure suction cavity, a first high-pressure nozzle is arranged in the first low-pressure suction cavity, and a first mixing cavity and a first diffusion cavity which are communicated with the first low-pressure suction cavity are arranged in the ejector shell; the second ejector comprises a second low-pressure suction cavity, a second high-pressure nozzle is arranged in the second low-pressure suction cavity, and a second mixing cavity and a second diffusion cavity which are communicated with the second low-pressure suction cavity are arranged in the ejector shell; the front side part of the ejector shell is connected with an air inlet shell, an air inlet cavity communicated with the first low-pressure suction cavity and the second low-pressure suction cavity is arranged in the air inlet shell, and a hydrogen return inlet is arranged on the air inlet shell; the front end of the ejector shell is connected with a valve shell, a new hydrogen channel is arranged in the valve shell, a switching valve for controlling the new hydrogen channel, a first proportional valve and a second proportional valve are sequentially arranged on the valve shell, outlets of the first proportional valve and the second proportional valve are respectively communicated with a first high-pressure nozzle and a second high-pressure nozzle, and a new hydrogen inlet is arranged on the valve shell; the rear end of the ejector shell is connected with an air outlet shell, an air outlet cavity communicated with the first diffusion cavity and the second diffusion cavity is arranged in the air outlet shell, and an air outlet is arranged on the air outlet shell.
The diameters of the second mixing chamber and the second diffusion chamber are larger than those of the first mixing chamber and the first diffusion chamber.
And the air inlet of the second low-pressure suction cavity and the air outlet of the first diffusion cavity are respectively provided with one-way valves.
And the valve shell is provided with a medium pressure sensor for detecting the pressure of the new hydrogen channel at the front sides of the first proportional valve and the second proportional valve.
The switch valve is used for controlling the on-off of the new hydrogen channel.
The first proportional valve is used for controlling the ratio of new hydrogen entering the first ejector from the new hydrogen channel and on-off.
The second proportional valve is used for controlling the ratio and the on-off of the new hydrogen entering the second ejector from the new hydrogen channel.
The air outlet shell is provided with a low-pressure sensor and a pressure relief valve which are communicated with the air outlet cavity.
The first proportional valve and the second proportional valve are opened independently or simultaneously.
The ejector shell is connected with the air inlet shell, the valve shell and the air outlet shell through bolts respectively and is provided with a sealing ring for sealing.
The utility model adopts the scheme and has the following advantages:
through integrating first ejector and second ejector in an organic whole, carry out independent control through first proportional valve and second proportional valve respectively first ejector and second ejector, the operating mode that the power is less for the fuel cell system can be applied to when first ejector alone, the operating mode that the power is medium for the fuel cell system can be applied to when second ejector alone, the operating mode that the power is great for the fuel cell system can be applied to when first ejector and second ejector simultaneous working, can satisfy the pressure demand of fuel cell system under the different operating modes. When the fuel cell system is operated, only the first proportional valve and the second proportional valve are required to be controlled, repeated disassembly and assembly are not required, time and labor are saved, the hydrogen return inlet is combined into one interface, the air outlet is also combined into one interface, the whole double injection integration level is high, and the fuel cell system is convenient to install.
Description of the drawings:
fig. 1 is a schematic perspective view of the present utility model.
Fig. 2 is a schematic top view of the present utility model.
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 C-C cross-sectional structure of fig. 2.
In the figure, 1, an ejector housing, 2, a first low-pressure suction cavity, 3, a first high-pressure nozzle, 4, a first mixing cavity, 5, a first diffusion cavity, 6, a second low-pressure suction cavity, 7, a second high-pressure nozzle, 8, a second mixing cavity, 9, a second diffusion cavity, 10, an air inlet housing, 11, an air inlet cavity, 12, a hydrogen return inlet, 13, a valve housing, 14, a new hydrogen channel, 15, a switching valve, 16, a first proportional valve, 17, a second proportional valve, 18, a new hydrogen inlet, 19, an air outlet housing, 20, an air outlet cavity, 21, an air outlet, 22, a one-way valve, 23, a medium-pressure sensor, 24, a low-pressure sensor, 25 and a pressure relief valve.
The specific embodiment is as follows:
in order to clearly illustrate the technical features of the present solution, the present utility model will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in fig. 1-5, a double ejector assembly suitable for different working conditions comprises an ejector shell 1, wherein a first ejector and a second ejector are arranged in the ejector shell 1 side by side, the first ejector comprises a first low-pressure suction cavity 2, a first high-pressure nozzle 3 is arranged in the first low-pressure suction cavity 2, and a first mixing cavity 4 and a first diffusion cavity 5 which are communicated with the first low-pressure suction cavity 2 are arranged in the ejector shell 1; the second ejector comprises a second low-pressure suction cavity 6, a second high-pressure nozzle 7 is arranged in the second low-pressure suction cavity 6, and a second mixing cavity 8 and a second diffusion cavity 9 which are communicated with the second low-pressure suction cavity 6 are arranged in the ejector shell 1; the front side part of the ejector shell 1 is connected with an air inlet shell 10, an air inlet cavity 11 communicated with the first low-pressure suction cavity 2 and the second low-pressure suction cavity 6 is arranged in the air inlet shell 10, and a hydrogen return inlet 12 is arranged on the air inlet shell 10; the front end of the ejector shell 1 is connected with a valve shell 13, a new hydrogen channel 14 is arranged in the valve shell 13, a switching valve 15 for controlling the new hydrogen channel 14, a first proportional valve 16 and a second proportional valve 17 are sequentially arranged on the valve shell 13, outlets of the first proportional valve 16 and the second proportional valve 17 are respectively communicated with the first high-pressure nozzle 3 and the second high-pressure nozzle 7, and a new hydrogen inlet 18 is arranged on the valve shell 13; the rear end of the ejector shell 1 is connected with an air outlet shell 19, an air outlet cavity 20 communicated with the first diffusion cavity 5 and the second diffusion cavity 9 is arranged in the air outlet shell 19, and an air outlet 21 is arranged on the air outlet shell 19.
The diameters of the second mixing chamber 8 and the second diffusion chamber 9 are larger than the diameters of the first mixing chamber 4 and the first diffusion chamber 5. By the design, the first ejector can be applied to the working condition of low power of the fuel cell system, and the second ejector is applied to the working condition of medium power of the fuel cell system.
The air inlet of the second low pressure suction cavity 6 and the air outlet of the first diffusion cavity 5 are respectively provided with a one-way valve 22 so as to prevent the first ejector and the second ejector from generating gas channeling when working independently.
The valve housing 13 is provided with a medium pressure sensor 23 for detecting the pressure of the new hydrogen channel 14 at the front sides of the first proportional valve 16 and the second proportional valve 17, and monitoring whether the pressures at the front ends of the first proportional valve 16 and the second proportional valve 17 are stable or not, wherein the stability of the pressures at the front ends directly influences the stability of the stacking pressure.
The switch valve 15 is used for controlling the on-off of the new hydrogen channel 14.
The first proportional valve 16 is used for controlling the proportion and on-off of the new hydrogen entering the first ejector from the new hydrogen channel 14.
The second proportional valve 17 is used for controlling the proportion and on-off of the new hydrogen entering the second ejector from the new hydrogen channel 14.
The air outlet shell 19 is provided with a low pressure sensor 24 and a pressure relief valve 25 which are communicated with the air outlet cavity 20, the low pressure sensor 24 can detect the gas pressure of the air cavity 20, and the pressure relief valve 25 is opened for pressure relief protection when the pressure is overlarge.
The first proportional valve 16 and the second proportional valve 17 are opened separately or simultaneously. The first proportional valve 16 can be applied to a small operating condition when opened alone; the second proportional valve 17 can be applied to medium working conditions when being opened independently; the first proportional valve 16 and the second proportional valve 17 are opened simultaneously, and can be applied to a large working condition.
The ejector shell 1 is connected with the air inlet shell 10, the valve shell 13 and the air outlet shell 19 through bolts respectively and is provided with a sealing ring for sealing.
When the device works, a new hydrogen inlet 18 is connected with a hydrogen source, hydrogen of the hydrogen source enters a switch valve 15 through a new hydrogen channel 14, and enters a first proportional valve 16 and a second proportional valve 17 respectively, hydrogen discharged from the first proportional valve 16 enters a first ejector, and is sequentially discharged to an air outlet cavity 20 through a first high-pressure nozzle 3, a first low-pressure suction cavity 2, a first mixing cavity 4 and a first diffusion cavity 5; the hydrogen discharged from the second proportional valve 17 enters the second ejector and is sequentially discharged to the air outlet cavity 20 through the second high-pressure nozzle 7, the second low-pressure suction cavity 6, the second mixing cavity 8 and the second diffusion cavity 9; the circulating hydrogen of the fuel cell stack is connected with a hydrogen return inlet 12, enters the first low-pressure suction cavity 2 and the second low-pressure suction cavity 6 from the hydrogen return inlet 12 through an air inlet cavity 11 respectively, and is also discharged to an air outlet cavity 20 backwards; the mixed gas of the gas outlet chamber 20 is uniformly discharged from the gas outlet 21 to the outside and returned to the fuel cell system.
The above embodiments are not to be taken as limiting the scope of the utility model, and any alternatives or modifications to the embodiments of the utility model will be apparent to those skilled in the art and fall within the scope of the utility model.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
Claims (10)
1. The utility model provides a be suitable for two ejector assemblies of different operating modes which characterized in that: the device comprises an ejector shell, wherein a first ejector and a second ejector are arranged in the ejector shell side by side, the first ejector comprises a first low-pressure suction cavity, a first high-pressure nozzle is arranged in the first low-pressure suction cavity, and a first mixing cavity and a first diffusion cavity which are communicated with the first low-pressure suction cavity are arranged in the ejector shell; the second ejector comprises a second low-pressure suction cavity, a second high-pressure nozzle is arranged in the second low-pressure suction cavity, and a second mixing cavity and a second diffusion cavity which are communicated with the second low-pressure suction cavity are arranged in the ejector shell; the front side part of the ejector shell is connected with an air inlet shell, an air inlet cavity communicated with the first low-pressure suction cavity and the second low-pressure suction cavity is arranged in the air inlet shell, and a hydrogen return inlet is arranged on the air inlet shell; the front end of the ejector shell is connected with a valve shell, a new hydrogen channel is arranged in the valve shell, a switching valve for controlling the new hydrogen channel, a first proportional valve and a second proportional valve are sequentially arranged on the valve shell, outlets of the first proportional valve and the second proportional valve are respectively communicated with a first high-pressure nozzle and a second high-pressure nozzle, and a new hydrogen inlet is arranged on the valve shell; the rear end of the ejector shell is connected with an air outlet shell, an air outlet cavity communicated with the first diffusion cavity and the second diffusion cavity is arranged in the air outlet shell, and an air outlet is arranged on the air outlet shell.
2. A dual ejector assembly for different conditions according to claim 1, wherein: the diameters of the second mixing chamber and the second diffusion chamber are larger than those of the first mixing chamber and the first diffusion chamber.
3. A dual ejector assembly for different conditions according to claim 1, wherein: and the air inlet of the second low-pressure suction cavity and the air outlet of the first diffusion cavity are respectively provided with one-way valves.
4. A dual ejector assembly for different conditions according to claim 1, wherein: and the valve shell is provided with a medium pressure sensor for detecting the pressure of the new hydrogen channel at the front sides of the first proportional valve and the second proportional valve.
5. A dual ejector assembly for different conditions according to claim 1, wherein: the switch valve is used for controlling the on-off of the new hydrogen channel.
6. A dual ejector assembly for different conditions according to claim 1, wherein: the first proportional valve is used for controlling the ratio of new hydrogen entering the first ejector from the new hydrogen channel and on-off.
7. A dual ejector assembly for different conditions according to claim 1, wherein: the second proportional valve is used for controlling the ratio and the on-off of the new hydrogen entering the second ejector from the new hydrogen channel.
8. A dual ejector assembly for different conditions according to claim 1, wherein: the air outlet shell is provided with a low-pressure sensor and a pressure relief valve which are communicated with the air outlet cavity.
9. A dual ejector assembly for different conditions according to claim 1, wherein: the first proportional valve and the second proportional valve are opened independently or simultaneously.
10. A dual ejector assembly for different conditions according to claim 1, wherein: the ejector shell is connected with the air inlet shell, the valve shell and the air outlet shell through bolts respectively and is provided with a sealing ring for sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322051430.3U CN220319959U (en) | 2023-08-01 | 2023-08-01 | Double ejector assembly suitable for different working conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322051430.3U CN220319959U (en) | 2023-08-01 | 2023-08-01 | Double ejector assembly suitable for different working conditions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220319959U true CN220319959U (en) | 2024-01-09 |
Family
ID=89411582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322051430.3U Active CN220319959U (en) | 2023-08-01 | 2023-08-01 | Double ejector assembly suitable for different working conditions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220319959U (en) |
-
2023
- 2023-08-01 CN CN202322051430.3U patent/CN220319959U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |