CN213304181U - An ejector reflux device and a hydrogen fuel cell system composed thereof - Google Patents
An ejector reflux device and a hydrogen fuel cell system composed thereof Download PDFInfo
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- CN213304181U CN213304181U CN202022390006.8U CN202022390006U CN213304181U CN 213304181 U CN213304181 U CN 213304181U CN 202022390006 U CN202022390006 U CN 202022390006U CN 213304181 U CN213304181 U CN 213304181U
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- 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
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Abstract
本实用新型公开了一种引射回流装置及其组成的氢燃料电池系统，属于氢燃料电池领域，其中，引射回流装置包括引射座、多个进气头和多个出气头，且引射座上设有多个贯穿其的安装孔，每个所述安装孔内安装有一个所述进气头；所述出气头密封安装在对应所述安装孔的另一端，每个所述进气头和出气头的内孔构成一个喷射通道；每个所述安装孔与对应所述进气头和出气头之间共同为何形成一个环形的空腔，且所述进气头与对应所述出气头相互靠近的一端具有使所述喷射通道与对应所述空腔连通的流道，所述引射座上设有与每个空腔连通的引射接口，而氢燃料电池系统包括该引射回流装置，该引射回流装置具有多个独立的通道，可同时满足多个电堆的需求，其集成化高。
The utility model discloses an ejector backflow device and a hydrogen fuel cell system composed thereof, belonging to the field of hydrogen fuel cells. The ejector backflow device comprises an ejector seat, a plurality of air inlet heads and a plurality of air outlet heads, and the ejector seat There are a plurality of installation holes running through it, and each of the installation holes is installed with one of the air inlet heads; the air outlet heads are sealed and installed at the other end corresponding to the installation holes, and each of the air inlet heads is installed. and the inner hole of the air outlet head to form an injection channel; why is an annular cavity formed between each of the installation holes and the corresponding air inlet head and the air outlet head, and the air inlet head and the corresponding air outlet head form an annular cavity together The ends that are close to each other have a flow channel that communicates the injection channel with the corresponding cavity, the ejection seat is provided with an ejection interface that communicates with each cavity, and the hydrogen fuel cell system includes the ejection return device , the ejector reflux device has multiple independent channels, which can meet the requirements of multiple stacks at the same time, and its integration is high.
Description
Technical Field
The utility model belongs to the fuel cell field especially relates to a draw and penetrate reflux unit and hydrogen fuel cell system of constituteing thereof.
Background
In Proton Exchange Membrane Fuel Cells (PEMFCs), maintaining the water balance of the proton exchange membrane is of great importance for the life of the stack. On the one hand, a dry film phenomenon occurs due to too low water content, which hinders the transport of protons; on the other hand, the water flooding phenomenon can be generated when the water content is too high, so that the diffusion of gas in the porous medium is hindered, and the output voltage of the electric pile is reduced. In addition, the continuous accumulation of impurity gases that penetrate from the cathode side to the anode also has an effect on the performance of the stack, which is more prominent in a hydrogen fuel cell system equipped with a dual stack. In order to solve the above problems of water blockage and gas permeation, a hydrogen discharge method is generally used to discharge water and accumulated impurity gases generated inside the stack. The hydrogen discharge frequency is too low, so that water blockage and impurity gas accumulation are easily caused, and the performance of the pile is reduced; too high a hydrogen discharge frequency wastes hydrogen and is a potential hazard.
In order to ensure the normal and stable operation of the fuel cell system and discharge the water generated in the fuel cell system to the outside of the cell, a hydrogen circulation method is generally adopted, the water generated in the cell is taken out of the cell, then a water-gas separation device is adopted to separate out the liquid water, and finally the hydrogen is circulated back to the inside of the system for reuse, so as to improve the utilization rate of the hydrogen.
The defects and shortcomings of the prior art are as follows: at present, hydrogen circulation and hydrogen return injection devices are common. Although the hydrogen circulation can be effectively improved, the hydrogen circulation device consumes electric energy to maintain the operation of the hydrogen circulation device, the hydrogen circulation device comprises a plurality of mechanical parts, vibration and noise are accompanied, bearings, lubricating oil and the like are included, the durability and the structural complexity do not meet the requirements, two sets of hydrogen circulation systems are required in a hydrogen fuel cell system provided with double electric piles, the cost is increased, fault points are increased, a single injection reflux device has certain advantages, but the structural performance cannot meet the requirement of the hydrogen fuel cell system provided with the multiple electric piles.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, an object of the present invention is to provide an injection reflux unit with multiple channels.
The utility model discloses a technical scheme who realizes above-mentioned purpose as follows: the injection reflux device comprises an injection seat, a plurality of air inlet heads and a plurality of air outlet heads;
the injection seat is columnar and is provided with a plurality of mounting holes penetrating through two ends of the injection seat, and the mounting holes, the air outlet heads and the air inlet heads are respectively in one-to-one correspondence;
the air inlet head is in a horn shape, the air outlet head is provided with an inner hole, and the opening area of one end of the inner hole is larger than that of the other end of the inner hole;
the thick ends of the plurality of air inlet heads face to the same end of the injection seat and are in sealing contact with the hole wall corresponding to the mounting hole;
the air outlet head is hermetically arranged at the other end corresponding to the mounting hole, the smaller opening end of the air outlet head is close to the air inlet head, an inner hole of each air inlet head and an inner hole of each air outlet head form a spraying channel, and one end of each air outlet head, which is far away from the air inlet head, forms an air outlet interface corresponding to the spraying channel;
every the mounting hole with correspond why form an annular cavity jointly between head of admitting air and the head of giving vent to anger, just the head of admitting air with correspond the head of giving vent to anger one end that is close to each other has and makes injection passageway with corresponding the runner of cavity intercommunication, draw and be equipped with on the seat and draw with the drawing interface that every cavity communicates.
Preferably, the gas outlet head is columnar and matched with the mounting hole, the inner hole of the gas outlet head penetrates through two ends of the mounting hole, a circle of baffle ring is convexly arranged in the middle part corresponding to the length direction of the gas outlet head, and the smaller end of the opening of the gas outlet head extends into the mounting hole to the baffle ring and the other end of the injection seat are abutted.
Preferably, the plurality of mounting holes are distributed at intervals on the edge of the injection seat.
Preferably, there are 2 or 3 or 4 mounting holes.
Preferably, the injection seat is cylindrical, and the plurality of mounting holes are uniformly distributed at intervals along the circumferential direction of the edge of the injection seat.
Preferably, the injection reflux device further comprises a strip-shaped injection head, the injection head is hollow, one end of the injection head is provided with a plurality of air outlets communicated with the inside of the injection head, the side wall or the other end of the injection head is provided with an air inlet communicated with the inside of the injection head, the air outlets are in one-to-one correspondence with the mounting holes, the injection head is hermetically mounted at one end of the injection seat close to the air inlet head, and each air outlet is aligned with the corresponding mounting hole and communicated with the injection channel corresponding to the mounting hole.
It is still another object of the present invention to provide a hydrogen fuel cell system having a plurality of stacks and capable of recycling residual gas in exhaust gas.
The hydrogen fuel cell system comprises a hydrogen storage tank, a galvanic pile and the injection backflow device, wherein a hydrogen outlet of the hydrogen storage tank is communicated with an air inlet, the galvanic pile is provided with a plurality of injection channels in one-to-one correspondence, each hydrogen inlet of the galvanic pile corresponds to the air outlet, each tail gas outlet of the galvanic pile is communicated with a gas-liquid separation device, and a gas outlet of the gas-liquid separation device corresponds to the injection port.
Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides an injection reflux unit has a plurality of injection channels, and each injection channel has a drainage mouth communicated with it respectively, so that the injection reflux unit can be matched with a plurality of galvanic piles, the integration degree is high, and the air flow for supplying air to each galvanic pile is more uniform; (2) the utility model provides a hydrogen fuel cell system integrates the height, and has a plurality of galvanic piles, but the gaseous recycle in the tail gas of every galvanic pile simultaneously to improve the utilization ratio of hydrogen among the entire system.
Drawings
Fig. 1 is a cross-sectional view of an injection reflux unit according to embodiment 1 of the present invention;
fig. 2 is a side view of the injection seat of embodiment 1 of the present invention when four mounting holes are provided.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "both ends", "one end", "the other end", "horizontal", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounting," "providing," "connecting," "communicating," and the like are to be understood in a broad sense, and for example, "communicating" may be direct communication or communication integrally formed with or communication between the two through a pipe. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1, the embodiment provides an injection reflux device, which includes an injection base 1, a plurality of air inlets 2, and a plurality of air outlets 3;
the injection seat 1 is columnar and is provided with a plurality of mounting holes 11 penetrating through two ends of the injection seat, and the mounting holes 11, the air outlet heads 3 and the air inlet heads 2 are respectively in one-to-one correspondence;
the air inlet head 2 is horn-shaped, the air outlet head 3 is provided with an inner hole, and the opening area of one end of the inner hole is larger than that of the other end of the inner hole;
each mounting hole 11 is internally provided with one air inlet head 2, and the thick ends of the air inlet heads 2 face the same end of the injection seat 1 and are in sealing contact with the hole wall corresponding to the mounting hole 11;
the gas outlet head 3 is hermetically mounted at the other end corresponding to the mounting hole 11, the smaller opening end of the gas outlet head is close to the gas inlet head 2, the inner hole of each gas inlet head 2 and the inner hole of each gas outlet head 3 form a jet channel (the two ends are large in opening, the middle part is small in opening and similar to a venturi tube structure), and one end of the gas outlet head 3 far away from the gas inlet head 2 forms a gas outlet interface corresponding to the jet channel;
every mounting hole 11 with correspond between head 2 and the head 3 of giving vent to anger why form an annular cavity 12 jointly (the tip of head and the pore wall that corresponds the mounting hole have annular space between, and the head of giving vent to anger plugs the other end of mounting hole, and above-mentioned annular space constitutes cavity 12 in the mounting hole this moment), just head 2 of giving vent to anger with corresponding the head 3 one end that is close to each other has the messenger jet passage with correspond the runner of cavity 12 intercommunication, draw and be equipped with on the seat 1 and draw with the interface 13 that draws of every cavity 12 intercommunication.
Wherein, preferentially, the mounting hole is the round hole, the cross-section of admitting air head and the head of giving vent to anger is the ring shape, and the two coaxial distribution (the thin end of admitting air the head aligns just promptly giving vent to anger the head hole), further preferentially, the one end that the head of admitting air and the head of giving vent to anger are close to each other flushes, the hole of giving vent to anger is close to the tip flaring of the one end of admitting air head, and the flaring will correspond cavity and injection channel intercommunication in the mounting hole, this flaring department constitutes promptly this moment the runner, just the runner is the annular.
The injection reflux device further comprises a strip-shaped injection head 4, the injection head 4 is hollow, one end of the injection head 4 is provided with a plurality of air outlets 41 communicated with the inside of the injection head, the side wall or the other end of the injection head is provided with an air inlet interface 42 communicated with the inside of the injection head, the air outlets 41 are in one-to-one correspondence with the mounting holes 11, the injection head 4 is hermetically mounted at one end, close to the air inlet head 2, of the injection seat 1, and each air outlet 41 is aligned with the corresponding mounting hole 11 and is communicated with the corresponding injection channel in the mounting hole 11.
Preferably, the gas outlet head 3 is columnar and is matched with the mounting hole 11, the inner hole of the gas outlet head penetrates through two ends of the mounting hole, a circle of baffle ring 31 is convexly arranged at the middle part corresponding to the length direction of the gas outlet head 3, and the smaller end of the opening of the gas outlet head 3 extends into the mounting hole 11 to the baffle ring 31 and the other end of the injection seat 1 are abutted.
As shown in fig. 2, the number of the mounting holes 11 is preferably 2, 3 or 4, although not limited thereto, and the injector seat 1 is cylindrical, and a plurality of the mounting holes 11 are uniformly distributed at intervals in the circumferential direction of the edge of the injector seat 1.
The principle of injection backflow in this embodiment is as follows (taking a single injection channel as an example): when the gas flows through the injection channel, the speed reaches the maximum value at the thin end of the corresponding gas inlet head, the gas flow enters the gas outlet head to continue flowing, the pressure in the cavity is reduced, and the negative pressure is formed at the injection interface, so that the gas at the injection interface is sucked into the cavity and enters the gas outlet head along with the gas flow.
Example 2
This embodiment provides a hydrogen fuel cell system, hydrogen fuel cell system includes hydrogen storage tank, galvanic pile and draws and penetrate reflux unit as embodiment 1, the hydrogen outlet of hydrogen storage tank with admit air interface 42 intercommunication, the galvanic pile be equipped with a plurality ofly and with a plurality of injection passage one-to-one, every the hydrogen entry of galvanic pile with correspond the interface intercommunication of giving vent to anger, every the tail gas outlet department of galvanic pile communicates respectively has a gas-liquid separation device 4, the gas outlet of gas-liquid separation device 4 with correspond draw and penetrate interface 13 intercommunication. The fuel cell stack is a hydrogen fuel cell stack (belonging to the prior art) and is provided with a hydrogen inlet, an oxygen inlet (used for introducing oxygen) and a tail gas outlet (water and residual gas are discharged from the tail gas outlet, wherein the hydrogen is taken as the main component in the residual gas), and a gas-liquid separation device 4 (belonging to the prior art) is used for separating the water and the gas discharged from the tail gas outlet, wherein the separated gas is recycled through an injection interface, and the separated water is directly discharged. The oxygen storage tank can be further included, and an oxygen outlet of the oxygen storage tank is respectively communicated with the oxygen inlets of the plurality of galvanic piles.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. The injection reflux device is characterized by comprising an injection seat, a plurality of air inlet heads and a plurality of air outlet heads;
the injection seat is columnar and is provided with a plurality of mounting holes penetrating through two ends of the injection seat, and the mounting holes, the air outlet heads and the air inlet heads are respectively in one-to-one correspondence;
the air inlet head is in a horn shape, the air outlet head is provided with an inner hole, and the opening area of one end of the inner hole is larger than that of the other end of the inner hole;
the thick ends of the plurality of air inlet heads face to the same end of the injection seat and are in sealing contact with the hole wall corresponding to the mounting hole;
the air outlet head is hermetically arranged at the other end corresponding to the mounting hole, the smaller opening end of the air outlet head is close to the air inlet head, an inner hole of each air inlet head and an inner hole of each air outlet head form a spraying channel, and one end of each air outlet head, which is far away from the air inlet head, forms an air outlet interface corresponding to the spraying channel;
every the mounting hole with correspond why form an annular cavity jointly between head of admitting air and the head of giving vent to anger, just the head of admitting air with correspond the head of giving vent to anger one end that is close to each other has and makes injection passageway with corresponding the runner of cavity intercommunication, draw and be equipped with on the seat and draw with the drawing interface that every cavity communicates.
2. The ejector reflux device as claimed in claim 1, wherein the gas outlet head is cylindrical and is matched with the mounting hole, an inner hole of the gas outlet head penetrates through two ends of the gas outlet head, a circle of baffle ring is convexly arranged in the middle part corresponding to the length direction of the gas outlet head, and the smaller opening end of the gas outlet head extends into the mounting hole until the baffle ring abuts against the other end of the ejector seat.
3. The ejector flow-back device of claim 1, wherein the plurality of mounting holes are spaced apart around the edge of the ejector seat.
4. The ejector flow-back device of claim 1, wherein there are 2, 3 or 4 mounting holes.
5. The ejector reflux device as claimed in claim 1, wherein the ejector seat is cylindrical, and the plurality of mounting holes are uniformly distributed at intervals in the circumferential direction of the edge of the ejector seat.
6. The injection backflow device as claimed in any one of claims 1 to 5, further comprising a bar-shaped injection head, wherein the injection head is hollow, one end of the injection head is provided with a plurality of air outlets communicated with the inside of the injection head, the side wall or the other end of the injection head is provided with an air inlet port communicated with the inside of the injection head, the air outlets are in one-to-one correspondence with the mounting holes, the injection head is hermetically mounted at one end of the injection seat close to the air inlet head, and each air outlet is respectively aligned with the corresponding mounting hole and communicated with the injection channel in the corresponding mounting hole.
7. A hydrogen fuel cell system, characterized in that, hydrogen fuel cell system includes hydrogen storage tank, galvanic pile and draws and penetrate reflux unit according to claim 6, the hydrogen outlet of hydrogen storage tank with the interface intercommunication of admitting air, the galvanic pile be equipped with a plurality ofly and with a plurality of injection passage one-to-one, every the hydrogen entry of galvanic pile with correspond the interface intercommunication of giving vent to anger, every the tail gas outlet department of galvanic pile communicates respectively has a gas-liquid separation device, gas-liquid separation device's gas outlet with correspond draw and penetrate the interface intercommunication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022390006.8U CN213304181U (en) | 2020-10-25 | 2020-10-25 | An ejector reflux device and a hydrogen fuel cell system composed thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022390006.8U CN213304181U (en) | 2020-10-25 | 2020-10-25 | An ejector reflux device and a hydrogen fuel cell system composed thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213304181U true CN213304181U (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022390006.8U Expired - Fee Related CN213304181U (en) | 2020-10-25 | 2020-10-25 | An ejector reflux device and a hydrogen fuel cell system composed thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213304181U (en) |
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2020
- 2020-10-25 CN CN202022390006.8U patent/CN213304181U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20210528 |