Air supply system and fuel cell engine with same

Abstract

The utility model provides an air supply system and a fuel cell engine with the same. The air supply system includes: a supercharger having a pressure end inlet and a pressure end outlet; the intercooler is communicated with the pressure end outlet; the humidifier is positioned between the intercooler and the electric pile structure and is used for humidifying gas entering the air inlet of the electric pile structure; the two ends of the first pipeline communicate with the air outlet and the air inlet of the intercooler, and the humidifier is arranged on the first pipeline; the first bypass valve is arranged on the first pipeline and is connected with the humidifier in parallel; two ends of the bypass pipeline are respectively communicated with an air outlet of the intercooler and an air outlet of the galvanic pile structure; wherein the bypass pipeline and the humidifier are arranged in parallel. The air supply system solves the problem that an air supply system in the prior art is prone to surging at a small flow point.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell engines, and in particular to an air supply system and a fuel cell engine having the same. Background Art

[0002] At present, fuel cell engines mainly provide oxygen to the stack structure through an air supply system to ensure that the stack structure can carry out the stack reaction.

[0003] However, in the existing technology, the air compressor of the air supply system surges at small flow points during operation, which not only affects the user experience, but also causes the entire fuel cell engine to shake and vibrate, affecting the normal operation and service life of the fuel cell engine. Utility Model Content

[0004] The main purpose of the utility model is to provide an air supply system and a fuel cell engine having the same, so as to solve the problem that the air compressor of the air supply system in the prior art is prone to surge at a small flow point.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, an air supply system is provided, including: a supercharger, having a pressure end inlet and a pressure end outlet; an intercooler, connected to the pressure end outlet; a humidifier, located between the intercooler and the fuel cell stack structure, for humidifying the gas in the air inlet entering the fuel cell stack structure; a first pipeline, the two ends of the first pipeline are respectively connected to the air outlet and the air inlet of the intercooler, and the humidifier is arranged on the first pipeline; a first bypass valve is arranged on the first pipeline and is connected in parallel with the humidifier; a bypass pipeline, the two ends of the bypass pipeline are respectively connected to the air outlet of the intercooler and the air outlet of the fuel cell stack structure; wherein, the bypass pipeline is arranged in parallel with the humidifier.

[0006] Furthermore, the humidifier has a first inlet, a first outlet, a second inlet and a second outlet, the first inlet is connected to the first outlet through the first chamber, and the second inlet is connected to the second outlet through the second chamber; the first inlet is connected to at least part of the air outlet of the intercooler, the first outlet is connected to the air inlet, and the second inlet is connected to the air outlet; the air supply system also includes: a gas-liquid separator, the gas-liquid separator is connected to the second outlet; a second pipeline, the two ends of the second pipeline are respectively connected to the gas-liquid separator and the vortex end inlet of the supercharger.

[0007] Furthermore, the air supply system also includes a third pipeline, the first outlet is connected to the air inlet through the third pipeline, and the first pipeline includes: a main pipeline, the first end of the main pipeline is connected to the air outlet of the intercooler; a first branch pipeline, the first end of the first branch pipeline is connected to the second end of the main pipeline, and the second end of the first branch pipeline is connected to the first inlet; a second branch pipeline, the first end of the second branch pipeline is connected to the second end of the main pipeline, and the second end of the second branch pipeline is connected to the third pipeline.

[0008] Furthermore, the first end of the bypass line is connected to the middle of the main line, and the second end of the bypass line is connected to the middle of the second line; the air supply system also includes: a second bypass valve, which is arranged on the bypass line and in parallel with the gas-liquid separator.

[0009] Furthermore, the air supply system further includes: a check valve, which is arranged on the third pipeline, and the flow direction of the check valve is from the first outlet to the air inlet.

[0010] Furthermore, the air supply system further includes: a fifth pipeline, the air outlet is connected to the second inlet through the fifth pipeline; and a back pressure valve is provided on the fifth pipeline.

[0011] Furthermore, the air supply system also includes: a sixth pipeline, a first end of the sixth pipeline is connected to at least part of the air outlet of the intercooler, and a second end of the sixth pipeline is connected to the box purge inlet of the fuel cell structure.

[0012] According to another aspect of the present invention, a fuel cell engine is provided, comprising a fuel cell stack structure and an air supply system; wherein the air supply system is the above-mentioned air supply system.

[0013] Furthermore, the fuel cell engine also includes a hydrogen supply system arranged at the front of the stack structure, the hydrogen supply system includes: a hydrogen and water discharge device, which is connected to the hydrogen outlet of the stack structure, the hydrogen and water discharge device includes a hydrogen discharge pipeline and a water discharge pipeline, and the hydrogen discharge pipeline and the water discharge pipeline are both connected to the fifth pipeline of the air supply system.

[0014] Furthermore, the connection position of the hydrogen exhaust pipeline and the water exhaust pipeline with the fifth pipeline is located between the back pressure valve of the air supply system and the air outlet of the fuel cell stack structure.

[0015] Applying the technical solution of the present invention, the air supply system includes a supercharger, an intercooler, a humidifier, a first pipeline, a first bypass valve, and a bypass pipeline. The supercharger has a pressure end inlet and a pressure end outlet, and the intercooler is connected to the pressure end outlet. The humidifier is located between the intercooler and the fuel cell stack structure to humidify the gas in the air inlet of the fuel cell stack structure. In this way, the two ends of the first pipeline are respectively connected to the air outlet of the intercooler and the air inlet, and the two ends of the bypass pipeline are respectively connected to the air outlet of the intercooler and the air outlet of the fuel cell stack structure, and the bypass pipeline and the humidifier are arranged in parallel. The humidifier is arranged in parallel with the first bypass valve and the bypass pipeline. The air flow in the first pipeline is adjusted by the first bypass valve and the bypass pipeline to eliminate air flow pulsation or blockage, thereby preventing the supercharger from surging. This solves the problem of air compressor surge easily occurring at low flow points in the air supply system of the prior art, improves the user experience, and extends the service life of the supercharger. Among them, when the air flow in the supercharger increases, the first bypass valve is started and the bypass pipeline is opened to make the gas flow more stable; when the air flow in the supercharger is small, the first bypass valve and the bypass pipeline are closed to ensure the gas supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A structural schematic diagram of an embodiment of an air supply system according to the present utility model is shown.

[0018] The above drawings include the following reference numerals:

[0019] 10. Supercharger; 11. Pressure end inlet; 12. Pressure end outlet; 13. Turbine end inlet;

[0020] 20. Intercooler;

[0021] 30. Humidifier; 31. First chamber; 32. Second chamber; 33. First inlet; 34. First outlet; 35. Second inlet; 36. Second outlet;

[0022] 40. Stack structure; 41. Air inlet; 42. Air outlet; 43. Box purge inlet;

[0023] 50. Gas-liquid separator;

[0024] 60. Second pipeline;

[0025] 70. Third pipeline;

[0026] 80, first pipeline; 81, main pipeline; 82, first branch pipeline; 83, second branch pipeline;

[0027] 90. First bypass valve; 100. Bypass pipeline; 110. Second bypass valve; 120. Check valve; 130. Fifth pipeline; 140. Back pressure valve; 150. Sixth pipeline; 160. Hydrogen exhaust pipeline; 170. Drain pipeline. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, directional words such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0031] In order to solve the problem that the air compressor of the air supply system in the prior art is prone to surge at a small flow point, the present application provides an air supply system and a fuel cell engine having the same.

[0032] like Figure 1 As shown, the air supply system includes a supercharger 10, an intercooler 20, a humidifier 30, a first pipeline 80, a first bypass valve 90, and a bypass pipeline 100. The supercharger 10 has a pressure-end inlet 11 and a pressure-end outlet 12. The intercooler 20 is connected to the pressure-end outlet 12. The humidifier 30 is located between the intercooler 20 and the fuel cell stack structure 40 to humidify the gas entering the air inlet 41 of the fuel cell stack structure 40. The two ends of the first pipeline 80 are connected to the air outlet of the intercooler 20 and the air inlet 41, respectively. The humidifier 30 is arranged on the first pipeline 80. The first bypass valve 90 is arranged on the first pipeline 80 and is connected in parallel with the humidifier 30. The bypass pipeline 100 has two ends connected to the air outlet of the intercooler 20 and the air outlet 42 of the fuel cell stack structure 40, respectively. The bypass pipeline 100 is arranged in parallel with the humidifier 30.

[0033] Using the technical solution of this embodiment, the two ends of the first pipeline 80 are respectively connected to the air outlet of the intercooler 20 and the air inlet 41. The two ends of the bypass pipeline 100 are respectively connected to the air outlet of the intercooler 20 and the air outlet 42 of the fuel cell stack structure 40. The bypass pipeline 100 is arranged in parallel with the humidifier 30. The humidifier 30 is arranged in parallel with the first bypass valve 90 and the bypass pipeline 100. The first bypass valve 90 and the bypass pipeline 100 adjust the air flow in the first pipeline 80 to eliminate air flow pulsation or blockage, thereby preventing the supercharger 10 from surging. This solves the problem of air compressor surge at low flow points in the air supply system of the prior art, improves the user experience, and extends the service life of the supercharger. When the air flow in the supercharger 10 increases, the first bypass valve 90 is activated and the bypass line 100 is opened to make the gas flow more stable; when the air flow in the supercharger 10 is small, the first bypass valve 90 and the bypass line 100 are closed to ensure the gas supply.

[0034] like Figure 1 As shown, the humidifier 30 has a first inlet 33, a first outlet 34, a second inlet 35, and a second outlet 36. The first inlet 33 communicates with the first outlet 34 through the first chamber 31, and the second inlet 35 communicates with the second outlet 36 through the second chamber 32. The first inlet 33 communicates with at least part of the air outlet of the intercooler 20, the first outlet 34 communicates with the air inlet 41, and the second inlet 35 communicates with the air outlet 42. The air supply system also includes a gas-liquid separator 50 and a second pipeline 60. The gas-liquid separator 50 communicates with the second outlet 36, and the two ends of the second pipeline 60 respectively communicate with the gas-liquid separator 50 and the turbine end inlet 13 of the supercharger 10. In this way, the gas-liquid separator 50 separates the liquid and gas, allowing the separated gas to be discharged into the environment and the separated liquid to be stored, thereby preventing condensation from dripping on the fuel cell engine.

[0035] Specifically, air enters the supercharger 10 through the compression end inlet 11, and then enters the intercooler 20 through the compression end outlet 12 for cooling treatment. The cooled air flows into the first inlet 33 of the humidifier 30, and after being humidified by the humidifying structure, enters the air inlet 41 of the fuel cell structure 40 from the first outlet 34. After the fuel cell reaction, it flows out from the air outlet 42 of the fuel cell structure 40, then enters the second inlet 35 and flows out from the second outlet 36, enters the turbine end inlet 13 of the supercharger 10 through the gas-liquid separator 50, and is then discharged into the tail exhaust pipe from the turbine end outlet of the supercharger 10.

[0036] like Figure 1As shown, the air supply system also includes a third pipeline 70, through which the first outlet 34 communicates with the air inlet 41. The first pipeline 80 includes a main pipeline 81, a first branch pipeline 82, and a second branch pipeline 83. The first end of the main pipeline 81 communicates with the air outlet of the intercooler 20, the first end of the first branch pipeline 82 communicates with the second end of the main pipeline 81, and the second end of the first branch pipeline 82 communicates with the first inlet 33. The first end of the second branch pipeline 83 communicates with the second end of the main pipeline 81, and the second end of the second branch pipeline 83 communicates with the third pipeline 70. This arrangement not only ensures that the first bypass valve 90 can be installed in parallel with the humidifier 30 to adjust the gas flow within the supercharger 10, but also simplifies the structure of the first pipeline 80, making it easier to manufacture and implement, thereby reducing the cost and difficulty of manufacturing the first pipeline 80.

[0037] like Figure 1 As shown, the first end of the bypass line 100 is connected to the middle of the main line 81, and the second end of the bypass line 100 is connected to the middle of the second line 60. The air supply system also includes a second bypass valve 110. The second bypass valve 110 is disposed on the bypass line 100 and in parallel with the gas-liquid separator 50. This allows the second bypass valve 110 to further adjust the gas flow within the supercharger 10, thereby preventing surge in the supercharger 10.

[0038] Specifically, a first bypass valve 90 is provided on the second branch line 83. After being cooled by the intercooler 20, the gas first enters the main line 81. A portion of the gas enters the humidifier 30 via the first branch line 82, and another portion enters the second branch line 83. The gas exhausted from the first and second branch lines 82, 83, enters the air inlet 41 through the third line 70 for fuel cell stack reaction.

[0039] like Figure 1 As shown, the air supply system further includes a check valve 120. Check valve 120 is disposed on third pipeline 70, with the flow direction of check valve 120 being from first outlet 34 to air inlet 41. Thus, the arrangement of check valve 120 ensures that the gas in third pipeline 70 flows from first outlet 34 to air inlet 41, preventing backflow of gas in third pipeline 70.

[0040] Optionally, the check valve 120 is an isolation valve.

[0041] like Figure 1As shown, the air supply system further includes a fifth pipeline 130 and a backpressure valve 140. The air outlet 42 is connected to the second inlet 35 via the fifth pipeline 130. The backpressure valve 140 is disposed on the fifth pipeline 130. This configuration of the backpressure valve 140 not only maintains the gas pressure in the fifth pipeline 130, ensuring stable gas flow within the fifth pipeline 130, but also prevents gas backflow within the fifth pipeline 130.

[0042] like Figure 1 As shown, the air supply system also includes a sixth pipeline 150. A first end of the sixth pipeline 150 communicates with at least a portion of the air outlet of the intercooler 20, and a second end of the sixth pipeline 150 communicates with the box purge inlet 43 of the stack structure 40. In this way, a portion of the gas exhausted from the intercooler 20 can enter the box purge inlet 43 through the sixth pipeline 150 to purge the internal components of the stack structure 40, preventing impurities from entering the stack structure 40 and affecting its normal operation.

[0043] In this embodiment, the above-mentioned arrangement of the check valve 120 and the back pressure valve 140 can play a role in anode protection when the fuel cell engine is shut down, thereby reducing the attenuation of the fuel cell stack and improving the integration of the fuel cell engine.

[0044] The present application also provides a fuel cell engine (not shown) comprising a stack structure 40 and an air supply system, wherein a portion of the air supply system is disposed at the bottom of the stack structure 40 and another portion is disposed at the rear of the stack structure 40; the air supply system is the aforementioned air supply system. This arrangement makes the air supply system more compactly distributed on the stack structure 40, improves the space utilization of the stack structure 40, and realizes an integrated design of the fuel cell engine.

[0045] like Figure 1 As shown, the fuel cell engine also includes a hydrogen supply system disposed at the front of the stack structure 40, which includes a hydrogen and water discharge device. The hydrogen and water discharge device is connected to the hydrogen outlet of the stack structure 40 and includes a hydrogen discharge pipeline 160 and a water discharge pipeline 170. Both the hydrogen discharge pipeline 160 and the water discharge pipeline 170 are connected to the fifth pipeline 130 of the air supply system. By integrating the hydrogen discharge pipeline 160 and the water discharge pipeline 170 on the fifth pipeline 130, the length of the water discharge pipe is significantly shortened, which helps reduce the risk of freezing at low temperatures, while also improving the overall integration of the machine and facilitating a reduction in overall size.

[0046] like Figure 1As shown, the connection locations of the hydrogen exhaust pipeline 160 and the water exhaust pipeline 170 with the fifth pipeline 130 are located between the back pressure valve 140 of the air supply system and the air outlet 42 of the fuel cell stack structure 40 .

[0047] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0048] The air supply system includes a supercharger, an intercooler, a humidifier, a first pipeline, a first bypass valve, and a bypass pipeline. The supercharger has a pressure end inlet and a pressure end outlet, and the intercooler is connected to the pressure end outlet. The humidifier is located between the intercooler and the fuel cell stack structure to humidify the gas in the air inlet entering the fuel cell stack structure. In this way, the two ends of the first pipeline are respectively connected to the air outlet of the intercooler and the air inlet, and the two ends of the bypass pipeline are respectively connected to the air outlet of the intercooler and the air outlet of the fuel cell stack structure, and the bypass pipeline and the humidifier are arranged in parallel. The humidifier is arranged in parallel with the first bypass valve and the bypass pipeline. The air flow in the first pipeline is adjusted by the first bypass valve and the bypass pipeline to eliminate air flow pulsation or blockage, thereby avoiding phenomena such as surge of the supercharger. This solves the problem of air compressor surge easily occurring at low flow points in the air supply system of the prior art, improves the user experience, and extends the service life of the supercharger. Among them, when the air flow in the supercharger increases, the first bypass valve is started and the bypass pipeline is opened to make the gas flow more stable; when the air flow in the supercharger is small, the first bypass valve and the bypass pipeline are closed to ensure the gas supply.

[0049] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0051] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An air supply system, characterized in that: include: A supercharger (10) having a pressure end inlet (11) and a pressure end outlet (12); an intercooler (20) in communication with the pressure end outlet (12); a humidifier (30), located between the intercooler (20) and the stack structure (40), for humidifying gas entering an air inlet (41) of the stack structure (40); a first pipeline (80), wherein both ends of the first pipeline (80) are respectively connected to the air outlet of the intercooler (20) and the air inlet (41), and the humidifier (30) is arranged on the first pipeline (80); a first bypass valve (90) disposed on the first pipeline (80) and connected in parallel with the humidifier (30); A bypass pipeline (100), wherein both ends of the bypass pipeline (100) are respectively connected to the air outlet of the intercooler (20) and the air outlet (42) of the fuel cell stack structure (40); Wherein, the bypass pipeline (100) and the humidifier (30) are arranged in parallel.

2. The air supply system according to claim 1, characterized in that The humidifier (30) has a first inlet (33), a first outlet (34), a second inlet (35) and a second outlet (36); the first inlet (33) is connected to the first outlet (34) through a first chamber (31), and the second inlet (35) is connected to the second outlet (36) through a second chamber (32); the first inlet (33) is connected to at least part of the air outlet of the intercooler (20), the first outlet (34) is connected to the air inlet (41), and the second inlet (35) is connected to the air outlet (42); the air supply system further includes: a gas-liquid separator (50), the gas-liquid separator (50) being in communication with the second outlet (36); A second pipeline (60), wherein both ends of the second pipeline (60) are respectively connected to the gas-liquid separator (50) and the turbine end inlet (13) of the supercharger (10).

3. The air supply system according to claim 2, characterized in that The air supply system further comprises a third pipeline (70), the first outlet (34) is connected to the air inlet (41) via the third pipeline (70), and the first pipeline (80) comprises: a main pipeline (81), wherein a first end of the main pipeline (81) is in communication with an air outlet of the intercooler (20); a first branch pipeline (82), wherein a first end of the first branch pipeline (82) is in communication with a second end of the main pipeline (81), and a second end of the first branch pipeline (82) is in communication with the first inlet (33); A second branch pipeline (83), wherein a first end of the second branch pipeline (83) is in communication with a second end of the main pipeline (81), and a second end of the second branch pipeline (83) is in communication with the third pipeline (70).

4. The air supply system according to claim 3, characterized in that The first end of the bypass pipeline (100) is in communication with the middle of the main pipeline (81), and the second end of the bypass pipeline (100) is in communication with the middle of the second pipeline (60); the air supply system further comprises: A second bypass valve (110) is provided on the bypass pipeline (100) and is arranged in parallel with the gas-liquid separator (50).

5. The air supply system according to claim 3, characterized in that The air supply system further comprises: A check valve (120) is provided on the third pipeline (70), and the flow direction of the check valve (120) is from the first outlet (34) to the air inlet (41).

6. The air supply system according to claim 3, characterized in that The air supply system further comprises: a fifth pipeline (130), wherein the air outlet (42) is connected to the second inlet (35) via the fifth pipeline (130); A back pressure valve (140) is provided on the fifth pipeline (130).

7. The air supply system according to claim 1, characterized in that The air supply system further comprises: A sixth pipeline (150), wherein a first end of the sixth pipeline (150) is connected to at least a portion of the air outlet of the intercooler (20), and a second end of the sixth pipeline (150) is connected to the box purge inlet (43) of the stack structure (40).

8. A fuel cell engine, characterized in that: It comprises a battery stack structure (40) and an air supply system; wherein the air supply system is the air supply system according to any one of claims 1 to 7.

9. The fuel cell engine according to claim 8, characterized in that: The fuel cell engine further comprises a hydrogen supply system arranged at the front of the stack structure (40), the hydrogen supply system comprising: A hydrogen and water discharge device is connected to the hydrogen outlet of the fuel cell structure (40), and the hydrogen and water discharge device includes a hydrogen discharge pipeline (160) and a water discharge pipeline (170). Both the hydrogen discharge pipeline (160) and the water discharge pipeline (170) are connected to the fifth pipeline (130) of the air supply system.

10. The fuel cell engine according to claim 9, characterized in that: The connection positions of the hydrogen exhaust pipeline (160) and the water discharge pipeline (170) with the fifth pipeline (130) are located between the back pressure valve (140) of the air supply system and the air outlet (42) of the fuel cell stack structure (40).

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