Hydrogen fuel cell engine operation auxiliary device

Abstract

The utility model provides a hydrogen fuel cell engine operation auxiliary device, and belongs to the technical field of hydrogen fuel cells. The air compressor is sufficient in air and wastes when the hydrogen fuel cell engine is in low power, and is insufficient in air when the hydrogen fuel cell engine is in high power. Comprising a first communication part connected with the hydrogen fuel cell reaction chamber and a second communication part connected with the hydrogen fuel cell reaction chamber through a compressed air storage tank, and the air inlet end of the air guide assembly is connected with an air compressor, and the air outlet end of the air guide assembly is connected with the hydrogen fuel cell reaction chamber. The air compressor compresses redundant air into the compressed air storage tank to be stored while providing air for the hydrogen fuel cell engine, and when the hydrogen fuel cell engine needs high load, in order to meet the air supply amount, the flow control mechanism stops supplementing air into the compressed air storage tank, so that the air supply amount is met. And meanwhile, the air in the compressed air storage tank is reversely supplemented into the hydrogen fuel cell reaction chamber to reduce the burden of the air compressor.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen fuel cell technology, and in particular to an auxiliary device for the operation of a hydrogen fuel cell engine. Background Technology

[0002] In the gas supply system of a hydrogen fuel cell engine, the mismatch between the hydrogen and air sides under varying loads restricts the increase in electrical power under high loads. The air side is supplied by an air compressor, which operates continuously at high speeds under varying loads, significantly impacting reliability and lifespan. Developing efficient transient variable load gas supply technology for the air side is of great significance for improving the operating efficiency and reliability of the air compressor and the output performance of the hydrogen fuel cell engine.

[0003] The amount of air required by a hydrogen fuel cell engine varies depending on the load. Existing hydrogen fuel cell engines have the technical problem of having sufficient but wasted air at low power and insufficient air at high power. Utility Model Content

[0004] In view of this, the present invention aims to provide an auxiliary device for the operation of a hydrogen fuel cell engine and its hydrogen compressor, so as to solve the technical problem that the air compressor wastes sufficient air when the hydrogen fuel cell engine is at low power and has insufficient air when the engine is at high power.

[0005] To achieve the above objectives, this utility model adopts the following technical solution to provide an auxiliary device for the operation of a hydrogen fuel cell engine, comprising:

[0006] The air guide assembly connects the air inlet end to the air compressor and the air outlet end to the hydrogen fuel cell reaction chamber.

[0007] The outlet includes a first connecting part that connects to the hydrogen fuel cell reaction chamber and a second connecting part that connects to the hydrogen fuel cell reaction chamber via a compressed air storage tank.

[0008] A flow control mechanism is provided on the air guide assembly, connecting the second connecting part and the compressed air storage tank;

[0009] The flow control mechanism includes a sealing assembly that controls the opening degree of the inlet of the flow control mechanism. The sealing assembly is connected to a hydrogen flow sensor. When the hydrogen flow increases, the hydrogen flow sensor drives the sealing assembly closer to the inlet. When the hydrogen flow decreases, the hydrogen flow sensor drives the sealing assembly away from the inlet.

[0010] Furthermore, the flow control mechanism also includes a connecting pipe connecting the second connecting part and the compressed air tank. The connecting pipe has a movable cavity that communicates with the air inlet. The sealing part of the sealing assembly slides inside the movable cavity. The movable cavity is connected to the air outlet of the connecting pipe through the connecting chamber.

[0011] Furthermore, the sealing assembly includes a contraction chamber, inside which a movable bolt is slidably disposed, the movable bolt being connected to the sealing part, the contraction chamber being connected to a hydraulic assembly, and the hydraulic assembly being connected to a hydrogen flow sensor.

[0012] Furthermore, the sealing part is a conical section.

[0013] Furthermore, the air inlet is a tapered truncated hole.

[0014] Furthermore, the air intake end of the air guiding assembly is equipped with a filter assembly.

[0015] Furthermore, a one-way valve is provided between the flow control mechanism and the compressed air storage tank.

[0016] Furthermore, the compressed air storage tank is connected to the hydrogen fuel cell reaction chamber via a solenoid valve, and the solenoid valve is connected to a hydrogen flow sensor to control the opening degree of the solenoid valve.

[0017] Furthermore, the solenoid valve and the first connecting part are connected to the hydrogen fuel cell reaction chamber via a connecting pipe.

[0018] Furthermore, the angle between the extended lines of the first connecting portion and the second connecting portion is an acute angle.

[0019] Beneficial effects:

[0020] The air guide assembly has an inlet end connected to an air compressor and an outlet end connected to a hydrogen fuel cell reaction chamber. The outlet end includes a first connecting part connected to the hydrogen fuel cell reaction chamber and a second connecting part connected to the hydrogen fuel cell reaction chamber via a compressed air storage tank. While supplying air to the hydrogen fuel cell engine, the air compressor compresses excess air into the compressed air storage tank for storage. When the hydrogen fuel cell engine requires a high load, in order to meet the air supply requirements, the flow control mechanism interrupts the replenishment of air into the compressed air storage tank. At the same time, the air inside the compressed air storage tank is fed back into the hydrogen fuel cell reaction chamber to reduce the burden on the air compressor. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of a hydrogen fuel cell engine operation auxiliary device according to the present invention;

[0023] Figure 2 This is a cross-sectional view of an auxiliary device for operating a hydrogen fuel cell engine according to the present invention.

[0024] Figure 3 This is a schematic diagram of the flow control mechanism of a hydrogen fuel cell engine operation auxiliary device according to the present invention;

[0025] Figure 4 This is a cross-sectional view of the flow control mechanism of a hydrogen fuel cell engine operation auxiliary device according to the present invention.

[0026] Air guiding assembly 1; first connecting part 2; second connecting part 3; flow control mechanism 4; connecting pipe 4-1; air inlet 4-2; air outlet 4-3; moving chamber 4-4; sealing part 4-5; connecting chamber 4-6; contraction chamber 4-7; compressed air storage tank 5; connecting pipe 6; solenoid valve 7. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0028] It should be noted that the descriptions of "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this utility model are defined based on the orientation or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Referring to the accompanying drawings, this embodiment provides an auxiliary device for operating a hydrogen fuel cell engine, comprising:

[0031] Air guide assembly 1, with its inlet end connected to an air compressor and its outlet end connected to the hydrogen fuel cell reaction chamber;

[0032] The outlet includes a first connecting part 2 that connects to the hydrogen fuel cell reaction chamber and a second connecting part 3 that connects to the hydrogen fuel cell reaction chamber via a compressed air storage tank 5.

[0033] The flow control mechanism 4 is disposed on the air guide assembly 1 and connects the second connecting part 3 and the compressed air storage tank 5;

[0034] The flow control mechanism 4 includes a sealing assembly that controls the opening degree of the air inlet 4-2 of the flow control mechanism 4. The sealing assembly is connected to a hydrogen flow sensor. When the hydrogen flow increases, the hydrogen flow sensor drives the sealing assembly closer to the air inlet 4-2. When the hydrogen flow decreases, the hydrogen flow sensor drives the sealing assembly away from the air inlet 4-2.

[0035] The air guiding assembly 1 is a Y-shaped guide tube. One outlet is the first connecting part 2, which is connected to the hydrogen fuel cell reaction chamber. The other outlet is the second connecting part 3, which is connected to the hydrogen fuel cell reaction chamber again through the flow control mechanism 4 and the compressed air storage tank 5. The flow control mechanism 4 is controlled by a hydrogen flow sensor. When the hydrogen flow increases, the hydrogen flow sensor drives the sealing assembly to move closer to the air inlet 4-2. When the hydrogen flow decreases, the hydrogen flow sensor drives the sealing assembly to move away from the air inlet 4-2. By moving the sealing assembly closer to or away from the air inlet 4-2, the amount of air supplied to the compressed air storage tank 5 through the second connecting part 3 is controlled, or the supply of air to the compressed air storage tank 5 is stopped.

[0036] In this embodiment, the flow control mechanism 4 further includes a connecting pipe 4-1 connecting the second connecting part 3 and the compressed air storage tank 5. The connecting pipe 4-1 has a movable cavity 4-4 communicating with the air inlet 4-2. The sealing part 4-5 of the sealing assembly slides inside the movable cavity 4-4. The movable cavity 4-4 is connected to the air outlet 4-3 of the connecting pipe 4-1 through the connecting chamber 4-6. The sealing assembly includes a contraction cavity 4-7. A movable bolt 4-8 is slidably provided inside the contraction cavity 4-7. The movable bolt 4-8 is connected to the sealing part 4-5. The contraction cavity 4-7 is connected to the hydraulic assembly. The hydraulic assembly is connected to the hydrogen flow sensor.

[0037] The sealing part 4-5 is a conical section, and the air inlet 4-2 is a conical orifice. When the hydrogen flow sensor detects a change in hydrogen flow, it regulates the hydraulic oil inside the contraction chamber 4-7 via the hydraulic assembly. When the hydrogen flow decreases, the hydraulic oil inside the contraction chamber 4-7 decreases, which pulls the moving bolt 4-8 to move. The moving bolt 4-8 causes the sealing part 4-5 to move at the air inlet 4-2. Because the sealing part 4-5 is a conical section and the air inlet 4-2 is a conical orifice, the further the sealing part 4-5 is from the air inlet 4-2, the more significant the movement. The distance from the air inlet 4-2 will increase the gap between the two, thereby increasing the flow rate of air entering the compressed air tank 5 through the flow control mechanism 4. When the hydrogen flow rate increases, the hydraulic oil inside the contraction chamber 4-7 will increase, and the moving bolt 4-8 will push the sealing part 4-5 closer, thereby reducing the flow rate. When the hydrogen flow rate exceeds the preset value, the flow control mechanism 4 will be completely closed. When the flow rate increases, the air inside the compressed air tank 5 will be fed back into the hydrogen fuel cell reaction chamber to compensate for the insufficient air output from the air compressor.

[0038] In this embodiment, the air intake end of the air guide assembly 1 is provided with a filter assembly.

[0039] To prevent impurities in the air from entering the hydrogen fuel cell engine and affecting the reaction between hydrogen and oxygen.

[0040] In this embodiment, a one-way valve is provided between the flow control mechanism 4 and the compressed air storage tank 5.

[0041] To prevent air inside the compressed air tank 5 from returning to the air guide assembly 1.

[0042] In this embodiment, the compressed air storage tank 5 is connected to the hydrogen fuel cell reaction chamber via a solenoid valve 7. The solenoid valve 7 is also connected to a hydrogen flow sensor. When the hydrogen flow exceeds a preset value, the larger the flow, the wider the solenoid valve 7 opens. The solenoid valve 7 and the first connecting part 2 are connected to the hydrogen fuel cell reaction chamber via a connecting pipe 6.

[0043] When the air supplied by the air compressor is insufficient for the hydrogen reaction, the hydrogen flow sensor controls the opening and closing of the solenoid valve 7 to allow air from inside the compressed air storage tank 5 to replenish the hydrogen in the connecting pipe 6. This air then enters the hydrogen fuel cell reaction chamber along with the air supplied by the air compressor through the connecting pipe 6, thus reducing the operating load on the air compressor. Through the coordinated work of the compressed air storage tank and the air compressor, the air compressor can always operate at a high efficiency within a small load variation range, improving the operating efficiency and reliability of the air compressor, and enhancing the engine's output power and transient load response characteristics.

[0044] In this embodiment, the included angle between the air outlet extension lines of the first connecting part 2 and the second connecting part 3 is an acute angle.

[0045] The acute angle reduces the resistance experienced by the air exhausted through the air guide assembly 1.

[0046] The sensors, controllers, and control programs mentioned above are all existing technologies and will not be elaborated upon.

[0047] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. An auxiliary device for operating a hydrogen fuel cell engine, characterized in that, include: The air guide assembly (1) has an inlet end connected to an air compressor and an outlet end connected to the hydrogen fuel cell reaction chamber. The outlet includes a first connecting part (2) that connects to the hydrogen fuel cell reaction chamber and a second connecting part (3) that connects to the hydrogen fuel cell reaction chamber via a compressed air storage tank (5). A flow control mechanism (4) is provided on the air guide assembly (1) to connect the second connecting part (3) and the compressed air storage tank (5); The flow control mechanism (4) includes a sealing assembly that controls the opening degree of the air inlet (4-2) of the flow control mechanism (4). The sealing assembly is connected to the hydrogen flow sensor. When the hydrogen flow increases, the hydrogen flow sensor drives the sealing assembly to move closer to the air inlet (4-2). When the hydrogen flow decreases, the hydrogen flow sensor drives the sealing assembly to move away from the air inlet (4-2).

2. The hydrogen fuel cell engine operation auxiliary device according to claim 1, characterized in that: The flow control mechanism (4) further includes a connecting pipe (4-1) connecting the second connecting part (3) and the compressed air tank (5). The connecting pipe (4-1) has a movable cavity (4-4) communicating with the air inlet (4-2). The sealing part (4-5) of the sealing assembly slides inside the movable cavity (4-4). The movable cavity (4-4) is connected to the air outlet (4-3) of the connecting pipe (4-1) through the connecting chamber (4-6).

3. The hydrogen fuel cell engine operation auxiliary device according to claim 2, characterized in that: The sealing assembly includes a contraction chamber (4-7), a movable bolt (4-8) is slidably disposed inside the contraction chamber (4-7), the movable bolt (4-8) is connected to the sealing part (4-5), the contraction chamber (4-7) is connected to the hydraulic assembly, and the hydraulic assembly is connected to the hydrogen flow sensor.

4. The hydrogen fuel cell engine operation auxiliary device according to claim 3, characterized in that: The sealing part (4-5) is a conical section.

5. The hydrogen fuel cell engine operation auxiliary device according to claim 4, characterized in that: The air inlet (4-2) is a tapered truncated hole.

6. The hydrogen fuel cell engine operation auxiliary device according to claim 1, characterized in that: The air guide assembly (1) has a filter assembly at the air inlet end.

7. A hydrogen fuel cell engine operation auxiliary device according to claim 1, 2, 3, 4, 5 or 6, characterized in that: A one-way valve is provided between the flow control mechanism (4) and the compressed air storage tank (5).

8. The hydrogen fuel cell engine operation auxiliary device according to claim 7 is characterized in that: The compressed air storage tank (5) is connected to the hydrogen fuel cell reaction chamber via a solenoid valve (7). The solenoid valve (7) is also connected to a hydrogen flow sensor to control the opening degree of the solenoid valve (7).

9. The hydrogen fuel cell engine operation auxiliary device according to claim 8, characterized in that: The solenoid valve (7) and the first connecting part (2) are connected to the hydrogen fuel cell reaction chamber via a connecting pipe.

10. The hydrogen fuel cell engine operation auxiliary device according to claim 9, characterized in that: The angle between the extended lines of the first connecting part (2) and the second connecting part (3) is an acute angle.

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