Water separator, fuel cell system and vehicle

Abstract

The embodiment of the utility model relates to a water separator and a fuel cell system. The water separator comprises a chamber; a guide portion within the chamber, including first and second sides in a first direction, and further including a plurality of guide vanes; the inlet is adjacent to the first side and is suitable for enabling the gas-liquid mixture to enter the chamber; a gas outlet adapted to discharge gas from the chamber; and a water outlet adapted to discharge the liquid from the chamber. Each guide blade in the plurality of guide blades comprises a first part and a second part, the second part is closer to the first side relative to the first part, and the incident flow surface, facing the first side, of the first part is connected with the first surface of the second part at a connecting part; and a first included angle between a first tangent plane of the incident flow surface at the connecting part and the axis is larger than a second included angle between a second tangent plane of the first surface at the connecting part and the axis.

Description

Technical Field

[0001] Embodiments of the present disclosure relate generally to fuel cells, and more particularly to a water separator, a fuel cell system, and a vehicle. Background Art

[0002] In proton exchange membrane fuel cells, water is produced along with the reaction in the fuel cell. If the water-gas mixture is not separated from the water-gas mixture, a lot of liquid water will enter the fuel cell stack, causing anode flooding. In addition, the accumulated water in the anode cycle will also increase the workload of the hydrogen circulation pump / ejector, reduce their performance and even cause failure. Therefore, it is necessary to use a gas-water separator in the fuel cell system. In the current fuel cell field, there are water separators based on a variety of separation principles. Among these water separators, cyclone or centrifugal water separators are widely used. Summary of the invention

[0003] A first aspect of the present disclosure relates to a water separator. The water separator includes a chamber formed inside the water separator. The water separator also includes a guide portion, which is arranged in the chamber and extends along an axis in a first direction. The guide portion includes a first side in the first direction and a second side away from the first side in the first direction, and also includes a plurality of guide blades extending spirally from the first side around the axis to the second side. The water separator also includes an inlet, which is arranged adjacent to the first side and is suitable for receiving a gas-liquid mixture and allowing the gas-liquid mixture to enter the chamber. The water separator includes a gas outlet, which is suitable for discharging gas separated from the gas-liquid mixture from the chamber. The water separator includes a water outlet, which is suitable for discharging liquid separated from the gas-liquid mixture from the chamber. Here, each of the plurality of guide blades includes a first part and a second part, the second part is closer to the first side than the first part, the oncoming surface of the first part facing the first side is connected to the first surface of the second part at a connection portion, and the first angle between the first tangent plane of the oncoming surface at the connection portion and the axis is greater than the second angle between the second tangent plane of the first surface at the connection portion and the axis.

[0004] The second aspect of the present disclosure relates to a fuel cell system. The fuel cell system comprises: a fuel cell stack; a water separator according to the first aspect of the present disclosure, the inlet of the water separator being connected to the anode outlet of the fuel cell; a hydrogen circulation pump, comprising a pump inlet and a pump outlet, the pump inlet being connected to the gas outlet of the water separator and the pump outlet being connected to the anode inlet of the fuel cell stack.

[0005] A third aspect of the present disclosure relates to a vehicle, which includes a fuel cell system according to the third aspect of the present disclosure.

[0006] The description and advantages of the first aspect of the present disclosure are also applicable to the relevant components of the second and third aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The above and other objects, features and advantages of the embodiments of the present disclosure will become more easily understood through the following detailed description with reference to the accompanying drawings. In the accompanying drawings, various embodiments of the present disclosure will be described in an exemplary and non-limiting manner, in which:

[0008] Figure 1 shows a schematic diagram of a fuel cell according to an exemplary embodiment of the present disclosure;

[0009] Figure 2A shows a schematic diagram of a water separator according to an exemplary embodiment of the present disclosure;

[0010] Figure 2B A schematic diagram showing a guide portion of a water separator according to an exemplary embodiment of the present disclosure is shown;

[0011] Figure 3 A schematic diagram showing a guide portion of a water separator according to another exemplary embodiment of the present disclosure;

[0012] Figure 4 A schematic diagram showing a guide portion of a water separator according to further exemplary embodiments of the present disclosure; and

[0013] Figure 5 A schematic diagram of a guide vane of a guide portion according to an exemplary embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0014] The principles of the present disclosure will now be described with reference to the various exemplary embodiments shown in the accompanying drawings. It should be understood that the description of these embodiments is only to enable those skilled in the art to better understand and further implement the present disclosure, and is not intended to limit the scope of the present disclosure in any way. It should be noted that similar or identical reference numerals may be used in the figures where feasible, and similar or identical reference numerals may represent similar or identical functions. Those skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods described herein may be adopted without departing from the principles of the present disclosure described herein.

[0015] As used herein, the term "including" and its variations will be interpreted as open-ended terms meaning "including but not limited to". The term "based on" will be interpreted as "based at least in part". The terms "one embodiment" and "embodiment" should be understood as "at least one embodiment". The term "another embodiment" should be understood as "at least one other embodiment". The terms "first", "second", etc. may refer to different or identical objects. Other explicit and implicit definitions may be included below. Unless the context clearly indicates otherwise, the definitions of terms are consistent throughout the specification.

[0016] As discussed above, a cyclone water separator is commonly used in industry. This water separator separates water and gas from a water-gas mixture by a rotation effect without using a filter. A cyclone water separator generally includes a cyclone chamber. The cyclone chamber may have an inlet arranged to deviate from the central axis of the cyclone chamber to generate a rotating flow or vortex of gas in the cyclone chamber. The water droplets moving with the gas move toward the side wall of the cyclone chamber under the action of the centrifugal force generated by the vortex, and are separated from the gas after reaching the side wall. However, the angle between the extension direction of the guide blades and the gas flow direction makes the gas have a large resistance when it reaches the surface of the guide blades, thereby generating a large pressure drop at the front end of the water separator, resulting in a large energy consumption.

[0017] In view of this, the present disclosure provides a water separator having guide blades of different parts with different extension directions. At the end side adjacent to the water-gas mixture inlet, the guide blades of the guide part have a smaller angle relative to the axis of the guide part, thereby achieving the guidance of the airflow and reducing the resistance of the airflow rising, thereby reducing the pressure drop at the end side and thus reducing energy consumption. Figures 1 to 5 , describing the structure of a water separator according to an exemplary embodiment of the present disclosure.

[0018] Figure 1 Schematic diagram of a fuel cell 100 according to an exemplary embodiment of the present disclosure is shown. Figure 1 As shown, the fuel cell system 100 may include a fuel cell stack 101, and the fuel cell stack 101 may include a cathode 102, an anode 103, and a membrane electrode 104. The oxygen in the cathode 102 and the hydrogen in the anode 103 may undergo an electrochemical reaction on the membrane electrode 104 to generate electrical energy. The fuel cell system 100 may also include a direct current / direct current (DC / DC) converter 120. The DC / DC converter 120 may adjust the voltage and current output by the fuel cell stack 101, and may convert the variable voltage provided by the fuel cell stack 101 into a stable output voltage. It should be understood that Figure 1 The fuel cell stack 101 is only a schematic diagram for illustration. In some embodiments, the fuel cell stack 101 may include a plurality of monolithic cells connected in series, and each monolithic cell may include a cathode, an anode, and a membrane electrode.

[0019] The fuel cell system 100 may further include a hydrogen injector 105, a water separator 106, a hydrogen circulation pump 107, a drain valve 108 and a hydrogen discharge valve 109. The hydrogen injector may supply hydrogen in the hydrogen storage system to the anode 103 and control the hydrogen pressure and flow rate. The water separator 106 may separate the liquid water in the gas at the gas outlet of the anode 103 and discharge the liquid water through the drain valve 108. The hydrogen discharge valve 109 may also be referred to as a purge valve, which may discharge the impurity gas when the concentration of the impurity gas (e.g., nitrogen) in the anode 103 becomes high. The hydrogen circulation pump 107 may circulate the unreacted hydrogen at the gas outlet of the anode 103 to the gas inlet of the anode 103.

[0020] The fuel cell system 100 may also include a filter 110, an air compressor 111, an intercooler 112, an upstream shutoff valve 113, an exhaust throttle valve 114, a bypass valve 115 and a tail exhaust muffler 116. The filter 110 may be referred to as an air filter, which may filter particulate impurities in the air to prevent the pipeline of the fuel cell system 100 from being blocked. The air compressor 111 may pressurize the air to provide air for the cathode 102 of the fuel cell stack 101. The intercooler 112 may cool the compressed air provided by the air compressor 111. The upstream shutoff valve 113 is in an open state when the fuel cell system 100 is in operation, and is closed when the fuel cell system 100 is in a shutdown state. The exhaust throttle valve 114 may discharge the cathode gas after the reaction, and may also adjust the gas pressure at the outlet of the cathode 102 and adjust the flow rate of the gas supplied to the fuel cell stack 101. The bypass valve 115 may be opened when the upstream shutoff valve 113 is closed to discharge the air provided by the air compressor 111. The tail exhaust muffler 116 can reduce the noise when the fuel cell system 100 is exhausting the exhaust.

[0021] In the fuel cell system 100, the hydrogen injector 105, the water separator 106, the hydrogen circulation pump 107, the drain valve 108, the hydrogen exhaust valve 109, and the anode 103 may be connected by pipelines, and together constitute the anode subsystem (also referred to as the anode loop) in the fuel cell system 100. The filter 110, the air compressor 111, the intercooler 112, the upstream shut-off valve 113, the exhaust throttle valve 114, the bypass valve 115, and the cathode 102 are connected by pipelines, and together constitute the cathode subsystem (also referred to as the cathode loop) in the fuel cell system 100. In the fuel cell system 100, the water and exhaust gas discharged from the anode subsystem and the exhaust gas discharged from the cathode subsystem can be discharged from the fuel cell system 100 through the tail exhaust. Figure 1 The pipeline and the flow direction of the gas or liquid in the pipeline are indicated by arrows.

[0022] The fuel cell system 100 also includes a fuel cell control unit (FCCU) 130, which can control various components in the fuel cell system 100 to achieve overall control of the fuel cell system, including management of hydrogen and air, energy conversion and supervision, fault diagnosis and processing, and communication with other systems.

[0023] It should be understood that Figure 1 The fuel cell system 100 shown is only an example of the embodiment of the present disclosure and cannot be a limitation of the embodiment of the present disclosure. The solution provided in the embodiment of the present disclosure can also be applied to other types of fuel cell systems. The fuel cell system in the embodiment of the present disclosure can be applied to various scenarios and can be configured as a power source or auxiliary power in various equipment, including but not limited to vehicles, yachts, aerospace equipment, underwater power equipment, etc.

[0024] According to an embodiment of the present disclosure, the guide vane of the water separator 106 has different parts extending in different directions. Among them, the part of the guide vane at the end side adjacent to the water-gas mixture inlet has a smaller angle relative to the axis of the guide portion, which achieves the guidance of the airflow and reduces the resistance of the airflow rise, thereby reducing the pressure drop at the end side, thereby reducing energy consumption, and at the same time reducing the energy consumption of the entire fuel cell system 100.

[0025] Figure 2A Schematic diagram of a water separator 200 according to an exemplary embodiment of the present disclosure is shown. The water separator 200 may correspond to Figure 1 The water separator 106 in the embodiment. Figure 2A As shown, the water separator 200 includes a chamber 202 extending in a first direction. The chamber 202 may be cylindrical, for example. A guide portion 204 extending along an axis A in the first direction is provided in the chamber 202. The guide portion 204 is provided on an axis 218 in the chamber 202. The guide portion 204 includes a first side S1 at which a first end in the first direction is located and a second side S2 at which a second end away from the first side S1 in the first direction is located.

[0026] exist Figure 2A In the embodiment, the guide portion 204 includes a plurality of guide blades 210. Each guide blade 210 includes a first portion 212 and a second portion 214, and the second portion 214 is closer to the first side S1 than the first portion 212. The first portion 212 extends in a direction inclined relative to the axis A. Therefore, the angle between each position of the first portion 212 and the axis A is greater than zero. In contrast, the second portion 214 is Figure 2AIn the embodiment shown, the second portion 214 extends in a direction parallel to the axis A. That is, in this embodiment, the connecting portion 213 extends in a straight line in a plane perpendicular to the axis A, and the second portion 214 extends in a straight line in the first direction. Thus, the angle of the second portion 214 relative to the axis A is zero and is smaller than the angle of the first portion 212 relative to the axis A.

[0027] The chamber 202 of the water separator 200 includes a side wall extending in a first direction and a bottom and a top at two ends of the chamber 202 in the first direction. The bottom and the top are parallel to each other and extend in a second direction perpendicular to the first direction. The top faces the second side S2 of the guide portion 204 and the bottom faces the first side S1 of the guide portion 204. An inlet 206 is provided at a position adjacent to the first side S1 on the side wall, which is opened in the second direction. The water-gas mixture generated from the fuel cell stack can enter the chamber 202 from the inlet 206 for water-gas separation. The chamber 202 also includes a gas outlet 208 adjacent to the second side S2 opened at the top. The gas separated from the gas-liquid mixture can be discharged from the chamber 202 to a downstream device via the gas outlet 208. In addition, the chamber 202 also includes a water outlet 216 adjacent to the side wall opened at the top. The water separated from the water-gas mixture can be discharged from the chamber 202 via the water outlet 216.

[0028] During the operation of the water separator 200, the water-gas mixture enters the chamber 202 from the inlet 206 and rotates around the guide portion 204 to form a cyclone or vortex. The flow of the water-gas mixture is supplied to the chamber 202 of the water separator 200 via the inlet 206, and the flow of the water-gas mixture mainly consists of gas with water entrained therein. In the water separator, the flow of the water-gas mixture flows toward the guide portion 204. After the flow of the water-gas mixture reaches the guide blade 210, it is separated into a plurality of small flows by the guide blade 210. Under the guidance of the guide blade, different parts of the small flows move toward the side wall respectively.

[0029] exist Figure 2AIn the illustrated embodiment, the flow of the water-gas mixture reaches the second portion 214 of the guide blade 210, and flows to the first portion 212 under the guidance of the second portion 214. At this time, the resistance to flow is reduced, so that the pressure drop at the first side S1 is reduced. Afterwards, the flow of the water-gas mixture forms a rotating flow or vortex in the space of the guide portion 204. Under the centrifugal force generated by the rotating flow, water droplets with a density higher than that of the gas will move radially outward to reach the inner surface of the side wall of the chamber 202. Afterwards, due to the high speed of the airflow in the chamber 202, the water droplets will move upward to the top along the inner surface of the side wall driven by the airflow. At the portion where the side wall is connected to the top, an arc-shaped transition surface is provided to guide water. Here, water enters the annular cavity 218 from the chamber 202 via the water outlet 216 at the top along the side wall. Afterwards, due to the reduction in the component of the force provided by the airflow in the direction in which the water moves, the water falls under the action of gravity.

[0030] Here, the upward flow in the chamber 202 consists almost exclusively of gas with little or no water, so the gas can be referred to as clean gas. The clean gas will leave the water separator 200 via the gas outlet 208. Figure 2A In the illustrated embodiment, the flow of the water-gas mixture reaches the second portion of the guide vane before being separated by the first portion of the guide vane, and under the guiding effect of the second portion, the upward flow resistance of the water-gas mixture is reduced, so that the pressure drop at the first side S1 of the guide portion is reduced.

[0031] For the sake of brevity, Figure 2A Only the simplified structure of the water separator and the guide part is shown. It should be understood that the water separator may also include components to achieve other functions. Figure 2B The structure of the guide portion 204 will be described in detail.

[0032] Figure 2B Shows Figure 2A FIG. 2 is a schematic diagram of the detailed structure of the guide portion 204 of the water separator 200 of the embodiment shown in FIG. Figure 2B As shown, the guide portion 204 includes 8 guide vanes. For the two purposes of increasing separation efficiency while avoiding a large pressure drop, each guide vane 210 has a first portion 212 extending obliquely relative to the axis A and a second portion 214 extending parallel to the axis A. The first portion 212 and the second portion 214 are coupled at a connection portion 213. In this embodiment, the connection portion 213 is a connection surface between an end surface of the first portion 212 adjacent to the first side S1 and an end surface of the second portion 214 adjacent to the second side S2.

[0033] The first portion 212 of each guide vane 210 has a first front main surface 212A facing the incoming flow and an opposite first rear main surface 212B. The first front main surface 212A and the first rear main surface 212B are parallel and are both curved surfaces. The first portion 212 of each guide vane 210 also has a first guide vane top 212C located on the second side S2 and a first guide vane bottom 212D adjacent to the first side S1. The first guide vane top 212C and the first guide vane bottom 212D can be substantially horizontal, that is, extend in the second direction, and the first guide vane bottoms of all first portions can be substantially located in the same horizontal plane. Accordingly, the guide vane tops of all first portions can be substantially horizontal. In some embodiments, the first portion 212 is inclined downward from the first guide vane top 212C to the first guide vane bottom 212D, and the inclination angle relative to the axis A is preferably in the range of 60° to 85°.

[0034] The second portion 214 of each guide vane 210 has a second front main surface 214A connected to the first front main surface 212A of the first portion 212 and a second rear main surface 214B connected to the rear main surface 212B of the first portion 212. The second portion 214 of each guide vane 210 also has a second guide vane top 214C adjacent to the second side S2 and a second guide vane bottom 214D adjacent to the first side S1. The second guide vane top 214C and the second guide vane bottom 214D may be substantially horizontal, i.e., extend in the second direction, and the second guide vane bottoms of all second portions may be substantially located in the same horizontal plane. Accordingly, the second guide vane tops of all second portions may be substantially horizontal. Figure 2B In the illustrated embodiment, the second portion 214 has a rectangular cross section. That is, the second front main surface 214A and the second rear main surface 214B are parallel planes to each other, and the second guide vane top 214C and the second guide vane bottom 214D are parallel planes to each other. Here, the connecting portion 213 is a connecting surface of the second guide vane top 214C and the first guide vane bottom 212.

[0035] exist Figure 2BIn the illustrated embodiment, the angle of the first portion 212 relative to the axis A is defined as a first angle α between a plane D1 where a tangent plane of the first main surface 212A of the first portion 212 at the connection portion 213 is located and the axis A. Similarly, the angle of the second portion 214 relative to the axis A is defined as a second angle β between a plane D2 where a tangent plane of the second main surface 214A of the second portion 214 at the connection portion 213 is located and the axis A. Here, since the plane D2 is parallel to the axis A, the second angle β is zero. In such an embodiment, since the second portion 214 has the same flow direction as the water-gas mixture, the resistance of the second portion 214 to the water-gas mixture is minimized, which is beneficial to reducing the pressure drop.

[0036] It should be understood that although FIG. 2A to FIG. 2B In the illustrated embodiment, the second portion extends in a direction parallel to the axis, but the second angle of the second portion relative to the axis may also be another angle smaller than the first angle. Figure 3 A schematic diagram of a guide portion having a second portion with a second angle not equal to 0 according to the present disclosure is shown.

[0037] like Figure 3 As shown, the guide portion 304 includes a plurality of guide vanes 310. Each guide vane 310 has a second portion 314 adjacent to a first side S1 of the guide portion 304 in the first direction and a first portion 312 adjacent to a second side S2 of the guide portion 304 away from the first side S1 in the first direction. The first portion 312 is coupled to the second portion 314 at a connection portion 313. In this embodiment, the connection portion 313 is a connection surface between an end surface of the first portion 312 adjacent to the first side S1 and an end surface of the second portion 314 adjacent to the second side S2.

[0038] Figure 3 The guide part and the first part of Figure 2A and 2B The guide portion 310 and the first portion are similar in structure, except for the shape and direction of the second portion. The first portion 312 of each guide vane 310 has a first front main surface 312A facing the incoming flow and a first rear main surface 312B opposite thereto. Accordingly, the second portion 314 of each guide vane 310 has a second front main surface 314A connected to the first front main surface 312A of the first portion 312 and a second rear main surface 314B connected to the rear main surface 312B of the first portion 312.

[0039] exist Figure 3In the illustrated embodiment, the angle of the first portion 312 relative to the axis A is defined as a first angle α between a plane D1 where a tangent plane of the first main surface 312A of the first portion 312 at the connection portion 313 is located and the axis A. Similarly, the angle of the second portion 314 relative to the axis A is defined as a second angle β between a plane D2 where a tangent plane of the second main surface 314A of the second portion 314 at the connection portion 313 is located and the axis A. Here, the second angle β is not zero and is smaller than the first angle α. In this embodiment, the second portion has a parallelogram cross-section. In such an embodiment, since the angle between the second portion 314 and the flow direction of the water-gas mixture is smaller than the angle between the first portion and the flow direction, the second portion 314 reduces the resistance of the water-gas mixture when it collides with the guide vane surface, which is beneficial to reducing the pressure drop.

[0040] In some embodiments, in order to further reduce the resistance of the guide vane to the water-gas mixture, a circular arc surface is provided at the connection between the first main surface 312A and the second main surface 314A to provide a smooth transition. In some embodiments, the guide portion can be integrally formed, for example, made of plastic by molding. In some alternative embodiments, the guide portion can be made of metal or other thermally stable materials. Some or all of the surfaces of the guide vanes of the guide portion can be covered with a hydrophobic material to increase the water separation capability.

[0041] In addition to the integral forming, as a supplement to a water separator that has been produced without guide vanes of the second part, the second part may be provided so as to be detachably coupled to the first part. Figure 4 Schematic diagram of a guide portion 400 having a guide vane configured to be detachable according to the present disclosure is shown. Figure 4 As shown, the guide portion 404 includes a first hub 416 located at the second side S2 of the guide portion 404 and a second hub 418 located at the first side S1. The first portion 412 of the guide vane 410 is fixed to the first hub 416, and the second portion 414 of the guide vane 410 is fixed to the second hub 418.

[0042] The first hub 416 includes a protrusion 420 extending from the end surface facing the first side S1 along the first direction toward the first side S1. The second hub 418 includes a hole 422. During assembly, the second hub 418 can be sleeved on the protrusion 420 of the first hub 416 through the hole 422, so that in the assembled state, the second part 414 is aligned with the first part 412. As a result, the water separator that has been produced and does not have the second part that plays a diversion role can be easily modified, thereby saving costs. It should be understood that Figure 4 The structure of the guide blade 410 of the guide portion 404 may correspond to Figure 2A , Figure 2B as well as Figure 3The guide vane structure in the embodiment of the present invention is used to reduce the pressure drop. For the purpose of brevity, the relevant description is omitted.

[0043] It should be understood that although Figure 4 In the illustrated embodiment, all second parts are integrally coupled to the first parts via the hub, however, the second parts may also be individually coupled to the first parts.

[0044] Figure 5 Schematic diagram showing details of the guide portion guide vane 510 according to an exemplary embodiment of the present disclosure. Figure 5 As shown, the guide vane 510 of the guide portion includes a first portion 512 and a second portion 514 connected to the first portion 512 at a connection portion 513. The width of the second portion 514 in a direction perpendicular to the axis of the guide portion gradually decreases from the connection portion 513 in a direction away from the connection portion 513. That is, the thickness of the second portion 514 gradually decreases in a direction from the connection portion 513 with the first portion 512 toward the first side. In some implementations, the second portion 514 may have a triangular cross-section. In some alternatives, the second portion 514 may have a teardrop-shaped cross-section. In such an embodiment, by setting the second portion providing guidance to have a width that gradually increases along the flow direction of the water-gas mixture, the guiding effect can be improved, and the flow resistance of the water-gas mixture can be further reduced, thereby reducing the pressure drop.

[0045] In addition, the present disclosure also provides a method according to Figure 2A The water separator in the embodiment shown, Figures 2B to 4 The guide portion in the embodiment shown, or Figure 5 The guide portion shown guides the blade of the vehicle.

[0046] Although the claims in this application have been formulated with respect to particular combinations of features, it will be understood that the scope of the present disclosure also includes any novel feature or any novel combination of features disclosed herein, whether explicitly or implicitly or in any generalization thereof, whether or not it relates to the same scheme in any claim currently claimed.

Claims

1. A water separator (200), characterized in that: The water separator (200) comprises: A chamber (202) formed inside the water separator (200); a guide portion (204) disposed in the chamber (202) and extending along an axis (A) in a first direction, the guide portion (204) comprising a first side in the first direction and a second side away from the first side in the first direction, and further comprising a plurality of guide blades (210) extending spirally from the first side around the axis (A) to the second side; an inlet (206) disposed adjacent to the first side and adapted to receive a gas-liquid mixture and allow the gas-liquid mixture to enter the chamber (202); a gas outlet (208) adapted to allow gas separated from the gas-liquid mixture to be discharged from the chamber (202); and a water outlet (216) adapted to allow liquid separated from the gas-liquid mixture to be discharged from the chamber (202), Each guide blade among the plurality of guide blades (210) comprises a first portion (212) and a second portion (214), the second portion (214) being closer to the first side than the first portion (212), and a first front main surface of the first portion (212) facing the first side is connected to a second front main surface of the second portion (214) at a connecting portion, and a first angle (α) between a first tangent plane (D1) of the first front main surface at the connecting portion and the axis (A) is greater than a second angle (β) between a second tangent plane (D2) of the second front main surface at the connecting portion and the axis (A).

2. The water separator (200) according to claim 1, characterized in that: The second angle (β) is zero.

3. The water separator (200) according to claim 1, characterized in that: The connecting portion extends in a straight line in a plane perpendicular to the axis (A), and the second portion (214) extends in a straight line in the first direction.

4. The water separator (200) according to claim 1, characterized in that: A surface of the guide vane at the connection portion facing the first side includes an arc surface.

5. The water separator (200) according to claim 1, characterized in that: The first portion (212) is detachably coupled to the second portion (214).

6. The water separator (200) according to claim 5, characterized in that: The guide portion (204) comprises: a first hub, the first portion being fixed to the first hub; and a second hub, the second part being fixed to the second hub, The first hub and the second hub are detachably coupled, so that the first part is coupled to the second part.

7. The water separator (200) according to claim 1, characterized in that: The thickness of the second portion gradually decreases in a direction from a connection portion with the first portion toward the first side.

8. The water separator (200) according to claim 7, characterized in that: The second portion includes a triangular or teardrop-shaped cross section.

9. The water separator (200) according to claim 1, characterized in that: The chamber (202) comprises: a side wall extending along the first direction, the inlet (206) being disposed on the side wall; and A top portion extends along a second direction perpendicular to the first direction and toward the second side of the guide portion (204), and the water outlet (216) is disposed at the top portion.

10. A fuel cell system (100), characterized in that: The fuel cell system (100) comprises: Fuel cell stack; The water separator (200) according to any one of claims 1 to 9, wherein the inlet of the water separator (200) is connected to the anode outlet of the fuel cell; A hydrogen circulation pump comprises a pump inlet and a pump outlet, wherein the pump inlet is connected to the gas outlet of the water separator and the pump outlet is connected to the anode inlet of the fuel cell stack.

11. A vehicle, characterized in that: The vehicle comprises a fuel cell system (100) according to claim 10.

Images