Wastewater treatment device and wastewater treatment method for fuel cell engine, and vehicle

Abstract

The invention discloses a waste water treatment device of a fuel cell engine, a waste water treatment method and a vehicle, the waste water treatment device comprises a water tank, a liquid level sensor, a water pump and a controller, the water tank is communicated with a water outlet of the fuel cell engine, and the liquid level sensor is arranged in the water tank and used for detecting the amount of waste water in the water tank; the water pump is used for conveying waste water in the water tank to the cooling system, the cooling system is suitable for cooling the fuel cell engine, the controller is electrically connected with the liquid level sensor and the water pump, and the controller is used for controlling the water pump to start and stop according to the working power of the fuel cell engine and the detection result of the liquid level sensor. According to the waste water treatment device of the fuel cell engine, waste water generated when the fuel cell engine works can be effectively utilized to assist the heat dissipation system of the fuel cell engine to dissipate heat of the fuel cell engine, the heat dissipation efficiency of the heat dissipation system is improved, the fuel cell engine can continuously output high power, and the service life of the fuel cell engine is prolonged. And the whole vehicle dynamic property is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell engines, and in particular to a wastewater treatment device, a wastewater treatment method and a vehicle for a fuel cell engine. Background Art

[0002] Due to their power requirements, hydrogen fuel cell heavy-duty trucks are generally equipped with high-power hydrogen fuel cell engines. At the same time, affected by the long-range demand for heavy-duty trucks, hydrogen fuel cell engines are also developing towards high power, resulting in serious heat generation when hydrogen fuel cell engines are working.

[0003] In the prior art, in order to reduce the temperature of the hydrogen fuel cell engine during operation, a cooling system is usually provided to dissipate the heat of the fuel cell engine. However, since heavy truck models need to face complex and diverse application scenarios, the cooling system cannot effectively dissipate the heat of the fuel cell engine.

[0004] In order to solve the above problems, a high-power high-pressure fan is usually used to assist the cooling system in cooling, which not only increases the cooling cost, but also has little improvement on the cooling effect, thus affecting the working performance of the hydrogen fuel cell engine. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first purpose of the present invention is to provide a wastewater treatment device for a fuel cell engine, which assists the heat dissipation of the heat dissipation system by recycling the wastewater of the fuel cell engine, which not only avoids energy waste and reduces the heat dissipation cost, but also effectively improves the heat dissipation effect of the heat dissipation system, which is conducive to improving the working performance of the fuel cell engine and solves the technical problem of poor heat dissipation performance of the fuel cell engine in the prior art.

[0006] The second objective of the present invention is to provide a wastewater treatment method based on the above wastewater treatment device.

[0007] A third object of the present invention is to provide a vehicle having the above-mentioned wastewater treatment device.

[0008] A wastewater treatment device for a fuel cell engine according to an embodiment of the present invention comprises: a water tank connected to a drain outlet of the fuel cell engine; a liquid level sensor disposed in the water tank, the liquid level sensor being used to detect the amount of wastewater in the water tank; a water pump, the water pump being used to transport the wastewater in the water tank to a cooling system, the cooling system being suitable for cooling the fuel cell engine; and a controller, the controller being electrically connected to the liquid level sensor and the water pump, the controller being used to control the start and stop of the water pump according to the working power of the fuel cell engine and the detection result of the liquid level sensor.

[0009] According to the wastewater treatment device of the fuel cell engine of the embodiment of the present invention, by controlling the start and stop of the water pump according to the working power of the fuel cell engine and the detection result of the liquid level sensor, the wastewater auxiliary cooling system of the fuel cell engine can be used to dissipate the heat of the fuel cell engine in a timely and accurate manner, thereby improving the heat dissipation effect, avoiding the high temperature of the fuel cell engine during operation to a certain extent, improving the working performance of the fuel cell engine, and being beneficial to ensuring the power of the entire vehicle.

[0010] In some embodiments, the water pump and / or the controller are arranged in the water tank; the interior of the water tank is hollow to form a accommodating cavity, the accommodating cavity is suitable for accommodating wastewater, the bottom wall of the accommodating cavity is provided with a groove, the liquid level sensor is a float level gauge, and the float of the float level gauge is arranged in the groove.

[0011] In some embodiments, a partition plate is provided in the water tank, and the partition plate extends along the length direction and / or width direction of the water tank to separate a plurality of accommodating spaces in the water tank, and the plurality of accommodating spaces are interconnected.

[0012] In some embodiments, the water tank is provided with a water receiving pipe, and the water receiving pipe has at least a first interface, a second interface and a third interface which are interconnected, the first interface is connected to the drain outlet of the fuel cell engine, the second interface is connected to the water tank, and the third interface is formed as an exhaust port.

[0013] In some embodiments, a fourth interface and a fifth interface are provided on the water tank, the fourth interface is suitable for connecting to an external water source to form a water inlet, and the fifth interface is formed as a drain.

[0014] In some embodiments, the water tank is also provided with a temperature sensor, which is used to detect the temperature of the wastewater. A drain valve is provided at the drain outlet. The drain valve and the temperature sensor are electrically connected to the controller respectively. The controller is used to control the action of the drain valve according to the detection results of the temperature sensor or the liquid level sensor.

[0015] In some embodiments, the wastewater treatment device further includes a filter, the water pump is connected to the water tank via a connecting pipe, the filter is disposed in the connecting pipe, and the filter is used to filter the wastewater flowing through the connecting pipe.

[0016] The wastewater treatment method based on the aforementioned wastewater treatment device according to an embodiment of the present invention includes: determining that the fuel cell engine has an auxiliary heat dissipation demand and determining that the wastewater treatment device meets the auxiliary heat dissipation conditions; and controlling the water pump to start.

[0017] According to the wastewater treatment method based on the aforementioned wastewater treatment device in an embodiment of the present invention, the wastewater auxiliary cooling system of the fuel cell engine can be used to timely and accurately dissipate heat for the fuel cell engine, thereby improving the heat dissipation effect, avoiding the high temperature of the fuel cell engine during operation to a certain extent, improving the working performance of the fuel cell engine, and being beneficial to ensuring the power of the entire vehicle.

[0018] In some embodiments, the auxiliary heat dissipation requirement of the fuel cell engine is: the working power P of the fuel cell engine satisfies: P>P1, and P1 is a first preset power; or, the working power P of the fuel cell engine satisfies: P2<P≤P1, and P2 is a second preset power; the auxiliary heat dissipation condition of the wastewater treatment device is: the wastewater level in the water tank is>the first level.

[0019] In some embodiments, the wastewater treatment device includes a temperature sensor, which is arranged on the water tank for detecting the temperature of the wastewater. The water tank is provided with a drain outlet, and the drain outlet is provided with a drain valve. The wastewater treatment method also includes: determining that the water tank meets the drainage condition; controlling the drain valve to open; wherein the drainage condition is: the wastewater level in the water tank is greater than the second liquid level; and / or the temperature of the wastewater is less than T1, and T1 is a first preset temperature.

[0020] A vehicle according to an embodiment of the present invention includes the aforementioned wastewater treatment device.

[0021] According to the vehicle of the embodiment of the present invention, by adopting the aforementioned wastewater treatment device, the working performance of the fuel cell engine of the vehicle can be improved, thereby improving the working performance of the vehicle and ensuring the driving experience to a certain extent.

[0022] Additional aspects and advantages of the invention will become apparent from the following description, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 The figure is an overall structural diagram of a wastewater treatment device according to some embodiments of the present invention.

[0025] Figure 2 It is a cross-sectional view of the liquid level sensor and the water tank in some embodiments of the present invention.

[0026] Figure 3 sectional views of wastewater treatment devices according to some embodiments of the present invention.

[0027] Figure 4Schematic diagram of the structure of water receiving pipes in some embodiments of the present invention.

[0028] Figure 5 Flow chart of drain valve control strategy according to some embodiments of the present invention.

[0029] Figure 6 Flowchart of wastewater treatment methods according to some embodiments of the present invention.

[0030] Figure 7 A further flow chart of the wastewater treatment method according to some embodiments of the present invention.

[0031] Reference numerals:

[0032] 1000. Wastewater treatment equipment;

[0033] 100, water tank; 110, accommodating chamber; 111, groove;

[0034] 200, liquid level sensor; 210, float; 220, guide rod;

[0035] 300, water pump;

[0036] 400, controller;

[0037] 500, filter;

[0038] 600, separator;

[0039] 700, water connection pipe; 710, first interface; 730, third interface; 740, boss;

[0040] 810, fourth interface;

[0041] 820, fifth interface;

[0042] 910. Temperature sensor;

[0043] 920, drain valve;

[0044] 930. Connecting pipe. DETAILED DESCRIPTION

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] The wastewater treatment device 1000 for a fuel cell engine according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0048] like Figure 1 As shown, the wastewater treatment device 1000 of the fuel cell engine according to the embodiment of the present invention includes: a water tank 100 , a liquid level sensor 200 , a water pump 300 and a controller 400 .

[0049] The water tank 100 is connected to the drain port of the fuel cell engine. Here, it means that the fuel cell engine has a drain port, and the water tank 100 is connected to the drain port.

[0050] It should be noted that by configuring the fuel cell engine to have a drain port, the drain port can be used to discharge water generated by chemical reactions during the operation of the fuel cell engine to ensure the normal operation of the fuel cell engine and to a certain extent the working performance of the fuel cell engine.

[0051] At the same time, by setting the water tank 100 to be connected to the drain port of the fuel cell engine, the water tank 100 can be used to recover the waste water discharged by the fuel cell engine during operation, thereby facilitating the subsequent full utilization of the waste water and avoiding energy waste.

[0052] Combination Figure 1 and Figure 2 As shown, the liquid level sensor 200 is disposed in the water tank 100, and the liquid level sensor 200 is used to detect the amount of waste water in the water tank 100, so as to control the recycling of waste water and reduce the difficulty of waste water control.

[0053] The water pump 300 is used to transport the wastewater in the water tank 100 to the cooling system, and the cooling system is suitable for cooling the fuel cell engine. It can be understood here that in order to ensure the working performance of the fuel cell engine, a cooling system is provided to cool the fuel cell engine, and the water pump 300 is provided as the power source of the wastewater treatment device 1000. In this way, when it is necessary to use the wastewater to assist the cooling system to dissipate heat, the wastewater in the water tank 100 is pumped into the cooling system through the water pump 300 to assist the cooling of the fuel cell engine. While avoiding the waste of wastewater energy, the cooling efficiency of the cooling system can also be improved, so that the temperature of the fuel cell engine during operation can be maintained within a suitable temperature range, so that the fuel cell engine can continuously output high power, further ensuring the working performance of the fuel cell engine, which is conducive to improving the power of the whole vehicle, and thus improving the driving experience.

[0054] The controller 400 is electrically connected to the liquid level sensor 200 and the water pump 300, and is used to control the start and stop of the water pump 300 according to the working power of the fuel cell engine and the detection result of the liquid level sensor 200. This makes it easier to control whether the wastewater is transported to the cooling system, reducing the difficulty of wastewater control.

[0055] At the same time, since the working power of the fuel cell engine is easy to detect, the control difficulty of the water pump 300 can be reduced by controlling the start and stop of the water pump 300 according to the working power of the fuel cell engine, thereby making it easy to implement the solution of using the wastewater auxiliary cooling system of the fuel cell engine to dissipate heat for the fuel cell engine in this application, and the feasibility is strong.

[0056] In some embodiments, when it is determined that the operating power of the fuel cell engine is too large and the detection result of the liquid level sensor 200 shows that there is a certain amount of wastewater in the water tank 100, the water pump 300 is controlled to start, so that the water pump 300 can be used to transport the wastewater in the water tank 100 to the cooling system, thereby using the wastewater to assist the cooling system to cool the fuel cell engine, thereby improving the cooling efficiency of the cooling system.

[0057] Accordingly, when it is determined that the operating power of the fuel cell engine is small; or, the detection result of the liquid level sensor 200 shows that the amount of waste water in the water tank 100 is small; or, the operating power of the fuel cell engine is small and the detection result of the liquid level sensor 200 shows that the amount of waste water in the water tank 100 is small, the water pump 300 is controlled to stop, and the waste water in the water tank 100 is stored in the water tank 100.

[0058] It can be seen from the above structure that the wastewater treatment device 1000 of the fuel cell engine of the embodiment of the present invention, by setting up a water tank 100, and setting the water tank 100 to be connected to the drain outlet of the fuel cell engine, so as to utilize the water tank 100 to recover the wastewater discharged by the fuel cell engine during operation, thereby facilitating the subsequent full utilization of the wastewater and avoiding energy waste.

[0059] At the same time, by controlling the start and stop of the water pump 300 according to the working power of the fuel cell engine and the detection result of the liquid level sensor 200, since the working power detection of the fuel cell engine is simple, convenient and easy to implement, not only can the waste water in the water tank 100 be transported to the cooling system, but also the difficulty of waste water control can be reduced, and the waste water auxiliary cooling system of the fuel cell engine can be used to dissipate heat for the fuel cell engine in a timely and accurate manner, thereby improving the heat dissipation effect, avoiding the high temperature of the fuel cell engine during operation to a certain extent, improving the working performance of the fuel cell engine, and being beneficial to ensuring the power of the entire vehicle.

[0060] It can be understood that, compared with the prior art, the present application not only sets up a water tank 100 connected to the drain outlet of the fuel cell engine, but also controls the start and stop of the water pump 300 by judging the working power of the fuel cell engine and the detection result of the liquid level sensor 200, so as to achieve the purpose of controlling the wastewater auxiliary cooling system in the water tank 100 to dissipate heat for the fuel cell engine according to the working power of the fuel cell engine and the detection result of the liquid level sensor 200, and realize timely and accurate use of the wastewater auxiliary cooling system of the fuel cell engine to dissipate heat for the fuel cell engine, thereby improving the heat dissipation effect of the cooling system, which is beneficial to improving the working performance of the fuel cell engine and ensuring the power of the whole vehicle.

[0061] It should be noted that experiments have shown that the present application utilizes a wastewater-assisted cooling system to dissipate heat for the fuel cell engine, thereby improving the heat dissipation performance of the cooling system by about 20%, reducing the risk of thermal runaway of the fuel cell engine, and helping to ensure the working performance of the fuel cell engine, thereby facilitating the improvement of the overall cruising range and power, and enhancing the driving experience.

[0062] Among them, the fuel cell engine mentioned above can be understood as a hydrogen fuel cell engine.

[0063] In some embodiments, the controller 400 is electrically connected to the liquid level sensor 200, the water pump 300, and the fuel cell engine through LIN (Local Interconnect Network) communication or CAN (Controller Area Network) communication. When the controller 400 is electrically connected to the liquid level sensor 200, the liquid level sensor 200 can transmit the detected wastewater volume to the controller 400; when the controller 400 is electrically connected to the fuel cell engine, the controller 400 is used to obtain the working power of the fuel cell engine; when the controller 400 is electrically connected to the water pump 300, the controller 400 can be used to control the start and stop of the water pump 300, so that the controller 400 can be used to control the start and stop of the water pump 300 according to the working power of the fuel cell engine and the detection result of the liquid level sensor 200.

[0064] In some embodiments, the water tank 100 is made of stainless steel, so that the water tank 100 can withstand damage to the water tank 100 from weak corrosive media such as air, steam and water, thereby extending the service life of the water tank 100.

[0065] In some embodiments, the volume of the water tank 100 is 40 L, so that the volume of the water tank 100 is much larger than that of a traditional auxiliary water tank, so that the water tank 100 can store waste water generated when the fuel cell engine is working with a larger capacity.

[0066] In some embodiments, Figure 1 As shown, the water tank 100 is a flat structure. The flat structure means that the size of the water tank 100 in the height direction is much smaller than the size of the water tank 100 in the length direction and / or width direction, so as to adapt to the layout space of the whole vehicle and reduce the difficulty of assembling the water tank 100.

[0067] in, Figure 1 The Z direction shown in the figure can be understood as the height direction of the water tank 100. Figure 1 The X direction shown in the figure can be understood as the length direction of the water tank 100. Figure 1 The Y direction shown in FIG. 1 can be understood as the width direction of the water tank 100. Figure 1 As shown, the dimension of the water tank 100 in the height direction is much smaller than the dimensions of the water tank 100 in the length direction and the width direction, so that the water tank 100 is formed into a flat structure.

[0068] In some embodiments, the water pump 300 is a booster spray water pump with a small flow rate and a large lift, so that the wastewater can be formed into a mist when sprayed through the nozzle of the water pump 300. In this way, when the wastewater is sprayed into the cooling system, it is beneficial to the evaporation and heat absorption of the wastewater, thereby facilitating the use of wastewater to improve the efficiency of the cooling system.

[0069] In some embodiments, Figure 1 As shown, the water pump 300 and / or the controller 400 are arranged in the water tank 100. Here, it means that the water pump 300 is arranged in the water tank 100; or, the controller 400 is arranged in the water tank 100; or, the water pump 300 and the controller 400 are both arranged in the water tank 100, so that the water pump 300 and / or the controller 400 can be integrated with the water tank 100, and it is also convenient to use the water tank 100 to support the water pump 300 and / or the controller 400, improve the position stability of the water pump 300 and / or the controller 400, and ensure the working performance of the water pump 300 and / or the controller 400 to a certain extent.

[0070] In some embodiments, Figure 1 As shown, the water pump 300 is arranged at one side of the water tank 100 in the length direction and connected to the water tank 100. Among them, by arranging the water pump 300 at one side of the water tank 100 in the length direction, on the one hand, it is convenient to make full use of the space of the water tank 100 in the length direction, which is conducive to arranging the water pump 300 in the water tank 100, reducing the difficulty of matching the water pump 300 with the water tank 100, and on the other hand, it is convenient to arrange the water pump 300 close to the cooling system, which is conducive to using the water pump 300 to transport the wastewater in the water tank 100 to the cooling system, and then it is convenient to use the wastewater to assist the cooling of the cooling system, thereby improving the cooling effect of the cooling system.

[0071] At the same time, the connection between the water pump 300 and the water tank 100 mentioned above can be welding, bonding or bolting, etc., which can reduce the difficulty of the matching connection between the water pump 300 and the water tank 100, and at the same time improve the connection strength between the water pump 300 and the water tank 100, so that the water pump 300 can be stably installed in the water tank 100, improve the position stability of the water pump 300, and ensure the working performance of the water pump 300 to a certain extent.

[0072] Of course, in some other embodiments, the water pump 300 may also be disposed on one side of the water tank 100 in the width direction and connected to the water tank 100 , and this application does not make any specific limitation.

[0073] In some implementations, such as Figure 1 As shown, the controller 400 is adjacent to the water pump 300 along the length direction of the water tank 100, and the controller 400 is connected to the water tank 100. Among them, by arranging the controller 400 to be adjacent to the water pump 300 along the length direction of the water tank 100, the controller 400 can be arranged close to the water pump 300 while being arranged in the water tank 100, so as to facilitate the electrical connection between the controller 400 and the water pump 300 and reduce the difficulty of the controller 400 and the water pump 300.

[0074] At the same time, by connecting the controller 400 to the water tank 100, the water tank 100 can be used to support the controller 400, thereby improving the position stability of the controller 400 and ensuring the working performance of the controller 400 to a certain extent.

[0075] It should be noted that the connection between the controller 400 and the water tank 100 mentioned here can be welding, bonding or bolting, etc., which can reduce the difficulty of the matching connection between the controller 400 and the water tank 100 while improving the connection strength between the controller 400 and the water tank 100, so that the controller 400 can be stably installed in the water tank 100.

[0076] In some embodiments, in combination Figure 1 and Figure 2 As shown, the water tank 100 is hollow inside to form a receiving chamber 110, and the receiving chamber 110 is suitable for receiving wastewater, so as to realize the use of the water tank 100 to store wastewater, reduce the difficulty of storing wastewater, facilitate the recycling of wastewater, and avoid waste of resources.

[0077] Alternatively, if Figure 2 As shown, the bottom wall of the accommodating cavity 110 is provided with a groove 111, and the liquid level sensor 200 is a float level gauge, and the float 210 of the float level gauge is arranged in the groove 111. In order to facilitate the use of the liquid level sensor 200 to detect the amount of wastewater in the water tank 100, it is convenient to control the start and stop of the water pump 300 according to the detection result of the liquid level sensor 200.

[0078] The liquid level sensor 200 is configured as a float level gauge, and the amount of waste water in the water tank 100 is detected mainly by utilizing the buoyancy of the waste water on the float 210 .

[0079] It should be noted that, since the water tank 100 is disposed in the vehicle, when the vehicle is driving, the wastewater in the water tank 100 will shake, thereby causing the wastewater to shake relative to the float 210 , affecting the detection result of the float 210 .

[0080] Based on this, the present application sets a groove 111 on the bottom wall of the accommodating chamber 110, and sets the float 210 in the groove 111. The groove 111 can limit the shaking of the wastewater to a certain extent, so that the wastewater around the float 210 is stable relative to the float 210, that is, the buoyancy of the wastewater acting on the float 210 is stable, thereby improving the accuracy of the detection of the float 210, and then the liquid level sensor 200 can be used to effectively detect the amount of wastewater in the water tank 100.

[0081] In some embodiments, Figure 2As shown, the liquid level sensor 200 has a guide rod 220, and the float 210 is movably arranged on the guide rod 220, so that the buoyancy of the wastewater can effectively control the movement of the float 210, thereby facilitating the use of the float 210 to detect the amount of wastewater in the water tank 100, reducing the difficulty of detection and improving the accuracy of detection.

[0082] In a specific example, the buoyancy of the float 210 is constant when the amount of wastewater is stable. At this time, the float 210 is fixed at a fixed position relative to the guide rod 220. During driving, the wastewater generated by the fuel cell engine is collected in the water tank 100, causing the liquid surface position of the accommodating chamber 110 to change vertically. At this time, the vertical position of the float 210 will change synchronously with the liquid surface position under the action of the buoyancy, that is, the float 210 can move along the extension direction of the guide rod 220, so as to facilitate the purpose of using the float 210 to detect the amount of wastewater.

[0083] That is to say, when the position of the liquid surface in the accommodating chamber 110 changes, the float 210 will also change synchronously under the action of buoyancy.

[0084] The change in the position of the liquid surface of the accommodating chamber 110 mentioned here includes a rise in the liquid surface and a fall in the liquid surface, so that it is convenient to use the float 210 to detect whether the wastewater in the water tank 100 is in a high liquid level state or a low liquid level state.

[0085] In some embodiments, when the float 210 moves upward under the action of buoyancy and is closer to the end of the guide rod 220 away from the float 210, it is judged that the wastewater in the water tank 100 is in a high liquid level state; when the float 210 moves downward under the action of buoyancy and is farther from the end of the guide rod 220 away from the float 210, it is judged that the wastewater in the water tank 100 is in a low liquid level state.

[0086] Specifically, when the distance between the center of the float 210 and the end of the guide rod 220 away from the float 210 is defined as L1, the wastewater in the water tank 100 is in a low liquid level state; when the distance between the center of the float 210 and the end of the guide rod 220 away from the float 210 is defined as L2, the wastewater in the water tank 100 is in a high liquid level state; in this way, when the float 210 moves to the point where the distance between the center of the float 210 and the end of the guide rod 220 away from the float 210 is L1, it can be converted into an electrical signal by an electronic conversion circuit to facilitate sending a signal that the wastewater in the water tank 100 is in a low liquid level state, which is beneficial for the controller 400 to control the start and stop of the water pump 300; when the float 210 moves to the point where the distance between the center of the float 210 and the end of the guide rod 220 away from the float 210 is L2, it can be converted into an electrical signal by an electronic conversion circuit to facilitate sending a signal that the wastewater in the water tank 100 is in a high liquid level state.

[0087] Among them, the specific sizes of L1 and L2 can be limited according to the size of the water tank 100, and this application does not make any specific restrictions.

[0088] It should be noted that, when it is detected that the waste water in the water tank 100 is in a low liquid level state, the water pump 300 can be controlled to stop by the controller 400 to avoid damage to the water pump 300 due to idling, thereby extending the service life of the water pump 300; when it is detected that the waste water in the water tank 100 is in a high liquid level state, part of the waste water in the water tank 100 can be discharged to avoid the waste water generated by the fuel cell engine during operation from being unable to be discharged, thereby avoiding affecting the normal operation of the fuel cell engine.

[0089] Part of the waste water in the water tank 100 can be discharged through the fifth interface 820 (the specific structure of the fifth interface 820 can be seen below).

[0090] In some embodiments, Figure 2 As shown, at least part of the bottom wall of the accommodating cavity 110 is recessed in a direction away from the top wall of the accommodating cavity 110 to form a groove 111, and the volume A of the groove 111 and the volume B of the water tank 100 satisfy: A=0.01B~0.03B. Among them, by setting at least part of the bottom wall of the accommodating cavity 110 to be recessed in a direction away from the top wall of the accommodating cavity 110 to form the groove 111, the difficulty of forming the groove 111 can be reduced, thereby reducing the difficulty of water level detection of the liquid level sensor 200.

[0091] In some embodiments, a limit plate is provided around part of the outer periphery of the groove 111, and the limit plate is located between the bottom wall and the top wall of the accommodating chamber 110. The limit plate is used to further limit the shaking of the wastewater in the groove 111, thereby improving the detection accuracy of the liquid level sensor 200. In addition, the limit plate is provided around part of the outer periphery of the groove 111, so as to prevent the limit plate from obstructing the connection between the groove 111 and the accommodating chamber 110.

[0092] At the same time, when the volume A of the groove 111 is small, the assembly difficulty of the liquid level sensor 200 will increase; when the volume A of the groove 111 is large, the volume of the accommodating chamber 110 will be excessively increased. Based on this, the present application sets the volume A of the groove 111 and the volume B of the water tank 100 to satisfy: A=0.01B~0.03B. While reducing the assembly difficulty of the liquid level sensor 200, the generated water volume and the actual water storage volume of the accommodating chamber 110 can be close.

[0093] In some embodiments, A=0.01B, 0.02B, or 0.03B, etc.

[0094] In some embodiments, in combination Figure 1 and Figure 3As shown, a partition plate 600 is provided in the water tank 100 , and the partition plate 600 extends along the length direction and / or the width direction of the water tank 100 to separate a plurality of accommodating spaces in the water tank 100 , and the plurality of accommodating spaces are interconnected. Here, it means that the partition plate 600 extends along the length direction of the water tank 100; or, the partition plate 600 extends along the width direction of the water tank 100; or, the partition plate 600 extends along the length direction and the width direction of the water tank 100. After the partition plate 600 is set as above, a plurality of interconnected accommodating spaces can be separated in the water tank 100. The cooperation of the plurality of interconnected accommodating spaces can reduce the shaking of the wastewater in the water tank 100. On the one hand, it can avoid the vehicle bumping and vibrating during driving, which may cause the wastewater in the water tank 100 to generate water waves to impact the wall surface of the water tank 100 and the water pump 300, thereby avoiding the water tank 100 from generating abnormal noise during driving, and it can also avoid the water waves impacting the wall surface of the water tank 100 and reducing the strength of the water tank 100. On the other hand, it can also avoid the wastewater from moving to one side of the water tank 100 due to shaking during driving, thereby ensuring that the wastewater in the water tank 100 is evenly distributed, thereby avoiding the phenomenon of discontinuous water supply of the water pump 300, and improving the effect of wastewater auxiliary heat dissipation.

[0095] At the same time, the partition plate 600 can also be used to increase the structural strength of the water tank 100 .

[0096] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0097] In a specific example, a plurality of partition plates 600 are provided in the water tank 100 , and the plurality of partition plates 600 extend along the length direction and the width direction of the water tank 100 , respectively, so as to separate a larger number of accommodating spaces in the water tank 100 and improve the separation effect of the partition plates 600 .

[0098] In some embodiments, a connecting hole may be provided on the partition plate 600 or at least a portion of the partition plate 600 may be provided to be spaced apart from the bottom wall of the accommodating chamber 110 to enable the plurality of accommodating spaces to be interconnected, so that wastewater in the plurality of accommodating spaces can flow to each other, so that the wastewater is evenly distributed in the accommodating chamber 110.

[0099] In some embodiments, in combination Figure 1 , Figure 3 and Figure 4As shown, a water receiving pipe 700 is provided on the water tank 100, and the water receiving pipe 700 has at least a first interface 710, a second interface (not shown in the figure) and a third interface 730 which are interconnected, the first interface 710 is connected to the drain port of the fuel cell engine, the second interface is connected to the water tank 100, and the third interface 730 is formed as an exhaust port. Among them, by setting the first interface 710 to be connected to the drain port of the fuel cell engine and setting the second interface to be connected to the water tank 100, it is convenient to achieve the connection between the water tank 100 and the drain port of the fuel cell engine, reduce the difficulty of connecting the water tank 100 and the fuel cell engine, so as to facilitate the use of the water tank 100 to recycle the waste water discharged by the fuel cell engine during operation, and then facilitate the subsequent full use of the waste water to avoid energy waste.

[0100] At the same time, by setting the third interface 730 as an exhaust port, the gas can be effectively discharged when the wastewater flows into the water tank 100, avoiding the gas occupying the space inside the water tank 100, thereby ensuring the water storage capacity of the water tank 100, and facilitating the use of the wastewater auxiliary heat dissipation system to dissipate heat, thereby improving the auxiliary heat dissipation effect of the wastewater.

[0101] Optionally, combined Figure 1 , Figure 3 and Figure 4 As shown, a boss 740 is provided at the exhaust port, and the boss 740 is provided on the bottom wall of the water receiving pipe 700 and protrudes toward the top wall of the water receiving pipe 700, so as to utilize the boss 740 for gas-liquid separation, and the protrusion height of the boss 740 is 3 mm to 7 mm. Among them, by utilizing the boss 740 for gas-liquid separation, in the process of exhaust gas discharge, it can be avoided to a certain extent that the waste water generated by the fuel cell engine during operation is discharged synchronously with the exhaust gas, thereby facilitating the recovery of the waste water, facilitating the subsequent heat dissipation of the fuel cell engine through the waste water auxiliary heat dissipation system, and improving the heat dissipation effect of the heat dissipation system.

[0102] In summary, the wastewater treatment device 1000 of the present application can separate the waste gas and wastewater generated by the fuel cell engine, and facilitates the collection of wastewater and the use of the wastewater for auxiliary heat dissipation of the fuel cell engine through the operation of the water pump 300.

[0103] At the same time, when the protrusion height of boss 740 is low, the gas-liquid separation effect of boss 740 will be reduced; when the protrusion height of boss 740 is high, on the one hand, it will hinder the gas discharge and reduce the exhaust gas discharge effect, and on the other hand, it may also increase the manufacturing cost of boss 740. Based on this, the present application sets the protrusion height of boss 740 to 3mm~7mm, which can improve the exhaust gas discharge effect and reduce the manufacturing cost of boss 740 while ensuring the gas-liquid separation effect of boss 740.

[0104] In some embodiments, the protrusion height of the boss 740 is 3 mm, 4 mm, 5 mm, 6 mm, or 7 mm.

[0105] In some embodiments, a baffle is disposed at a position of the water receiving pipe 700 close to the exhaust port, and the baffle is formed as a boss 740 to reduce the difficulty of molding the boss 740 .

[0106] Among them, the baffle can be fixed to the bottom wall of the water receiving pipe 700 by welding, bonding or clamping, so as to set the boss 740 on the bottom wall of the water receiving pipe 700, improve the position stability of the boss 740, and ensure the working performance of the boss 740 to a certain extent.

[0107] In some embodiments, Figure 1 As shown, the water tank 100 is provided with a fourth interface 810 and a fifth interface 820. The fourth interface 810 is suitable for connecting to an external water source to form a water inlet, and the fifth interface 820 is formed as a drain.

[0108] It should be noted that since the generated water of the fuel cell engine is in a gas-liquid mixed state when discharged and the exhaust pressure is high, part of the generated water will be discharged into the atmosphere along with the gas, which in turn leads to a low collection speed of the generated water. In order to facilitate the use of generated water to assist the heat dissipation system in dissipating heat, the present application provides a water inlet, which can replenish water from an external water source to the water tank 100 when necessary to quickly fill the water tank 100, facilitate the auxiliary heat dissipation system and ensure the vehicle's power during driving.

[0109] In addition, the fourth interface 810 can also support the first manual filling of the water tank 100 after the new car is assembled.

[0110] At the same time, when there is too much waste water in the water tank 100, it will hinder the discharge of waste water generated by the fuel cell engine during operation, thereby affecting the normal operation of the fuel cell engine. Therefore, the present application sets a drain outlet to discharge part of the waste water in the water tank 100 when there is too much waste water in the water tank 100, so that the waste water generated by the fuel cell engine during operation can be effectively discharged into the water tank 100, so that the fuel cell engine can operate normally.

[0111] In the description of the present invention, features limited to "first", "second", "third", "fourth" and "fifth" may explicitly or implicitly include one or more of the features, and are used to distinguish and describe the features, without any order or importance.

[0112] In some embodiments, Figure 1As shown, the water tank 100 is also provided with a temperature sensor 910, which is used to detect the temperature of the wastewater. A drain valve 920 is provided at the drain outlet. The drain valve 920 and the temperature sensor 910 are electrically connected to the controller 400 respectively. The controller 400 is used to control the action of the drain valve 920 according to the detection result of the temperature sensor 910 or the liquid level sensor 200. This is to facilitate the discharge of part of the wastewater through the drain outlet, reducing the control difficulty of the drain outlet.

[0113] It should be noted that when the temperature of the wastewater is low, the wastewater is prone to freezing, which affects the normal flow of the wastewater and further affects the auxiliary heat dissipation of the wastewater. Based on this, the present application configures the controller 400 to control the operation of the drain valve 920 according to the temperature sensor 910.

[0114] Specifically, the drain valve 920 is a normally closed valve. When the temperature sensor 910 detects that the wastewater temperature is low, the temperature sensor 910 transmits the detected signal to the controller 400. The controller 400 controls the drain valve 920 to open so that part of the wastewater in the water tank 100 can be discharged through the drain port. The flow of wastewater is achieved during the discharge process, thereby preventing the wastewater from freezing.

[0115] It should also be noted that when there is too much waste water in the water tank 100, it will hinder the discharge of waste water generated by the fuel cell engine during operation, affecting the normal operation of the fuel cell engine. Based on this, the present application configures the controller 400 to control the action of the drain valve 920 according to the detection results of the liquid level sensor 200.

[0116] Specifically, the drain valve 920 is a normally closed valve. When the liquid level sensor 200 detects that the wastewater in the water tank 100 is in a high liquid level state, the controller 400 controls the drain valve 920 to open so that part of the wastewater in the water tank 100 can be discharged through the drain port. At this time, there can be some space in the water tank 100 to receive the wastewater, so that the wastewater generated by the fuel cell engine during operation can be effectively discharged into the water tank 100, so that the fuel cell engine can operate normally.

[0117] That is to say, the drain valve 920 can be opened when the liquid level sensor 200 detects a high liquid level, and can also be placed in a normally open state when the ambient temperature is lower than a certain temperature value, so as to avoid, to a certain extent, the water in the water tank 100 being full and causing the fuel cell engine to be unable to exhaust and drain normally, and to a certain extent avoid ice formation in the water tank 100 and affecting the auxiliary heat dissipation of the wastewater treatment device 1000, thereby avoiding affecting the normal operation of the fuel cell engine.

[0118] In summary, no matter the water tank 100 is at a high liquid level or a low liquid level, the liquid level sensor 200 will transmit a signal to the controller 400, providing important judgment conditions for the controller 400 to control the opening and closing of the water pump 300 and the drain valve 920 under different working conditions.

[0119] In a specific example, the control strategy of the drain valve 920 can be found in Figure 5 ,like Figure 5 As shown, when it is detected that the wastewater level in the water tank 100 is ≥ the second liquid level, the drain valve 920 is controlled to open, or, when it is detected that the wastewater temperature is < T1, the drain valve 920 is controlled to open; when it is detected that the wastewater level in the water tank 100 is < the second liquid level and the wastewater temperature is detected to be ≥ T1, the drain valve 920 is controlled to close.

[0120] Among them, the second liquid level mentioned here can be understood as a high liquid level. When it is detected that the wastewater level in the water tank 100 is ≥ the second liquid level, it means that the amount of wastewater in the water tank 100 is large. At this time, controlling the drain valve 920 to open can allow part of the wastewater in the water tank 100 to be discharged through the drain port, so that there is part of the space in the water tank 100 to receive the wastewater, ensuring that the wastewater generated by the fuel cell engine during operation can be effectively discharged into the water tank 100, so that the fuel cell engine can operate normally; at the same time, when the wastewater temperature is <T1, it means that when the temperature of the wastewater is low, the wastewater is prone to freezing. At this time, controlling the drain valve 920 to open can allow part of the wastewater in the water tank 100 to be discharged through the drain port, and the flow of wastewater is achieved during the discharge process, thereby avoiding the freezing of wastewater.

[0121] It should be noted that T1 can be limited according to the actual use environment, and this application does not make any specific restrictions.

[0122] In some embodiments, Figure 1 As shown, the wastewater treatment device 1000 further includes a filter 500. The water pump 300 is connected to the water tank 100 through the connecting pipe 930. The filter 500 is arranged in the connecting pipe 930. The filter 500 is used to filter the wastewater flowing through the connecting pipe 930. This can prevent impurities in the wastewater from flowing into the water pump 300 to a certain extent, thereby preventing the nozzle of the water pump 300 from being blocked due to excessively large water impurity particles or long-term scaling, thereby ensuring the working performance of the water pump 300 to a certain extent.

[0123] In some embodiments, the filter 500 is disposed in the water tank 100 so as to utilize the water tank 100 to support the filter 500, thereby improving the position stability of the filter 500 and ensuring the working performance of the filter 500 to a certain extent.

[0124] Of course, in some other embodiments, a filter 500 may also be set at the fourth interface 810 and the first interface 710 to prevent impurities in the wastewater from flowing into the water tank 100 to a certain extent, and further prevent impurities from flowing into the water pump 300 and clogging the nozzle of the water pump 300.

[0125] In summary, the wastewater treatment device 1000 of the present application is a wastewater treatment device 1000 that integrates a water tank 100, a liquid level sensor 200, a water pump 300, a controller 400, a filter 500, a partition plate 600, a water connecting pipe 700, a fourth interface 810, a fifth interface 820, a temperature sensor 910, a drain valve 920 and a connecting pipe 930. It can combine the signal of the liquid level sensor 200, the temperature sensor 910, and an external input signal (such as: ambient temperature, the need for wastewater cooling access to the fuel cell engine, etc.) to control the opening and closing of the water pump 300 and the drain valve 920, which not only meets the high radiator requirements of the high-power fuel cell engine, but also can serve as a part of the thermal management energy-saving control strategy of the whole vehicle.

[0126] The following describes a wastewater treatment method for a fuel cell engine according to an embodiment of the present invention with reference to the accompanying drawings.

[0127] The wastewater treatment method of the fuel cell engine according to the embodiment of the present invention is based on the aforementioned wastewater treatment device 1000, and the specific structure of the wastewater treatment device 1000 is not described in detail herein. Figure 6 As shown, wastewater treatment methods include:

[0128] Determining that the fuel cell engine has an auxiliary heat dissipation requirement and determining that the wastewater treatment device 1000 meets the auxiliary heat dissipation condition;

[0129] The water pump 300 is controlled to be turned on.

[0130] It can be seen from the above method that the wastewater treatment method based on the wastewater treatment device 1000 of the embodiment of the present invention, when the fuel cell engine has an auxiliary heat dissipation demand and it is determined that the wastewater treatment device 1000 meets the auxiliary heat dissipation conditions, controls the water pump 300 to start. At this time, the water pump 300 can be used to transport the wastewater in the water tank 100 to the cooling system, so as to use the wastewater auxiliary cooling system to cool the fuel cell engine, improve the heat dissipation efficiency of the cooling system, avoid the high temperature of the fuel cell engine during operation to a certain extent, improve the working performance of the fuel cell engine, and help to ensure the power of the whole vehicle.

[0131] It should be noted that the above-mentioned controlling the water pump 300 to turn on refers to the controller 400 controlling the water pump 300 to turn on.

[0132] In some embodiments, the auxiliary heat dissipation requirement of the fuel cell engine is: the working power P of the fuel cell engine satisfies: P>P1, P1 is the first preset power; or, the working power P of the fuel cell engine satisfies: P2<P≤P1, P2 is the second preset power; the auxiliary heat dissipation condition of the wastewater treatment device 1000 is: the wastewater level in the water tank 100>the first liquid level. That is to say, when the working power P of the fuel cell engine is>P1, or, the working power P of the fuel cell engine satisfies: P2<P≤P1; and the wastewater level in the water tank 100 is>the first liquid level, the water pump 300 is controlled to start.

[0133] The first liquid level mentioned here can be understood as a low liquid level, and the high liquid level can be understood as a second liquid level.

[0134] It should be noted that the first preset power P1 mentioned here is the power value obtained by engineers before the vehicle leaves the factory by testing different working conditions, different ambient temperatures and different driving speeds. When the vehicle meets the working conditions, ambient temperature and driving speed but the working power P exceeds the first preset power P1, the fuel cell engine will generate serious heat. If the fuel cell engine is not cooled in time or the cooling effect of the fuel cell engine is poor, it will affect the output power of the fuel cell engine, and then affect the performance of the vehicle. Therefore, when the present application controls the wastewater-assisted heat dissipation, it first detects whether the working power P of the fuel cell engine is greater than the first preset power P1. When P>P1, it means that the output power of the fuel cell engine will increase. At this time, the water pump 300 is controlled to start, so as to use the water pump 300 to transport the wastewater in the water tank 100 to the cooling system, thereby using the wastewater-assisted cooling system to cool the fuel cell engine, so that the temperature of the fuel cell engine during operation can be maintained within a suitable temperature range, thereby improving the working performance of the fuel cell engine to a certain extent.

[0135] It should also be noted that during the operation of the fuel cell engine, the working power P of the fuel cell engine is not a fixed value, but has an upper and lower floating range. If P>P1, the water pump 300 is controlled to be turned on, and when P<P1, the water pump 300 is controlled to be turned off. In this way, when the working power P of the fuel cell engine reaches the first preset power P1 but fluctuates relative to the first preset power P1, the water pump 300 will be frequently started and stopped.

[0136] Based on this, the present application also determines whether the operating power P of the fuel cell engine satisfies: P2<P≤P1.

[0137] Optionally, the second preset power P2 = P1 - ΔP, where ΔP can be understood as a power value that fluctuates up and down relative to the first preset power P1 when the fuel cell engine is working, and different types of fuel cell engines have different power fluctuation values.

[0138] In a specific example, △P is a certain value, such as: △P=200KW, △P=300KW or △P=500KW, etc. When P>P1-△P, it means that the fuel cell engine is operating within the normal fluctuation range relative to P1. At this time, if the water pump 300 is controlled to be closed, then when P>P1, the water pump 300 needs to be turned on again, resulting in frequent start and stop of the water pump 300. Therefore, the above-mentioned control of turning on the water pump 300 when P>P1-△P can avoid frequent starting of the water pump 300 due to fluctuations in the working power P of the fuel cell engine, thereby extending the service life of the water pump 300. At the same time, when the power of the fuel cell engine reaches the first preset power P1 and fluctuates normally relative to the first preset power P1, the water pump 300 can be used to transport the wastewater in the water tank 100 to the cooling system, thereby using the wastewater-assisted cooling system to dissipate heat from the fuel cell engine.

[0139] In a specific example, Figure 7 As shown, during the operation of the fuel cell engine, the operating power P of the fuel cell engine is monitored in real time. When it is detected that the operating power P of the fuel cell engine is greater than P1, whether the wastewater level in the water tank 100 is greater than the first level is detected. When the wastewater level in the water tank 100 is greater than the first level, the water pump 300 is controlled to start; when the wastewater level in the water tank 100 is less than or equal to the first level, the water pump 300 is controlled to stop running.

[0140] Correspondingly, when it is detected that the working power P of the fuel cell engine is less than or equal to P1, it is detected whether the working power P of the fuel cell engine satisfies: P>P2. When the working power P of the fuel cell engine satisfies: P>P2, it is detected whether the wastewater level in the water tank 100 is greater than the first level. When the wastewater level in the water tank 100 is detected to be greater than the first level, the water pump 300 is controlled to start; when the wastewater level in the water tank 100 is detected to be less than or equal to the first level, the water pump 300 is controlled to stop running. When it is detected that the working power P of the fuel cell engine does not satisfy: P>P2, the water pump 300 is directly controlled to stop running. At this time, the heat dissipation system can meet the heat dissipation of the fuel cell engine, and there is no need to use wastewater to assist in heat dissipation.

[0141] In a specific example, the controller 400 can receive vehicle-related information (such as the operating power P of the fuel cell engine, ambient temperature, and vehicle speed, etc.) through LIN communication or CAN communication, and then control the operation of the water pump 300 in combination with the signals from the temperature sensor 910 and the liquid level sensor 200.

[0142] In some embodiments, Figure 1As shown, the wastewater treatment device 1000 includes a temperature sensor 910, which is disposed in a water tank 100 for detecting the temperature of wastewater. A drain port is disposed on the water tank 100, and a drain valve 920 is disposed at the drain port. Figure 5 As shown, the wastewater treatment method also includes:

[0143] Determining that the water tank 100 meets the drainage condition;

[0144] Control the drain valve 920 to open;

[0145] The drainage conditions are: the wastewater level in the water tank 100 is greater than the second level; and / or the wastewater temperature is less than T1, where T1 is a first preset temperature.

[0146] It can be understood here that when the wastewater treatment device 1000 includes a temperature sensor 910 and a drain valve 920, the operation of the drain valve 920 can be controlled according to the detection results of the liquid level sensor 200 and the temperature sensor 910, so as to discharge part of the wastewater through the drain port on the water tank 100, reduce the difficulty of controlling the drain port, and ensure the performance of the water tank 100.

[0147] Among them, the drainage condition is set as: the wastewater level in the water tank 100 is greater than the second liquid level; and / or the temperature of the wastewater is less than T1, T1 is the first preset temperature, which means that when the wastewater level in the water tank 100 is greater than the second liquid level, the drain valve 920 is controlled to open to discharge part of the wastewater through the drain port; or, when the temperature of the wastewater is less than T1, the drain valve 920 is controlled to open to discharge part of the wastewater through the drain port; or, when the wastewater level in the water tank 100 is greater than the second liquid level and the temperature of the wastewater is less than T1, the drain valve 920 is controlled to open to discharge part of the wastewater through the drain port.

[0148] It should be noted that the second liquid level can be understood as a high liquid level. When it is detected that the wastewater level in the water tank 100 is ≥ the second liquid level, it means that the amount of wastewater in the water tank 100 is large. At this time, controlling the drain valve 920 to open can allow part of the wastewater in the water tank 100 to be discharged through the drain port, so that there is some space in the water tank 100 to receive the wastewater, ensuring that the wastewater generated by the fuel cell engine during operation can be effectively discharged into the water tank 100, so that the fuel cell engine can operate normally; at the same time, when the wastewater temperature is <T1, it means that when the temperature of the wastewater is low, the wastewater is prone to freezing. At this time, controlling the drain valve 920 to open can allow part of the wastewater in the water tank 100 to be discharged through the drain port, realizing the flow of wastewater during the discharge process, thereby avoiding the freezing of wastewater.

[0149] That is to say, the present application controls the operation of the drain valve 920 according to the detection results of the liquid level sensor 200 and the temperature sensor 910, thereby allowing some space in the water tank 100 to receive waste water and preventing the waste water in the water tank 100 from freezing, thereby ensuring the performance of the water tank 100 to a certain extent.

[0150] Among them, the first preset temperature T1 can be limited before the vehicle leaves the factory, and this application does not make any specific restrictions.

[0151] In a specific example, T1 = 0°C.

[0152] Next, a vehicle according to an embodiment of the present invention will be described.

[0153] A vehicle according to an embodiment of the present invention includes a wastewater treatment device 1000 .

[0154] Among them, the wastewater treatment device 1000 is the aforementioned wastewater treatment device 1000, and the specific structure of the wastewater treatment device 1000 is not described here.

[0155] It can be seen from the above structure that the vehicle of the embodiment of the present invention, by adopting the aforementioned wastewater treatment device 1000, can improve the working performance of the vehicle's fuel cell engine, thereby improving the working performance of the vehicle and ensuring the driving experience to a certain extent.

[0156] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0157] The specific structures of the wastewater treatment device 1000 of the fuel cell engine, the wastewater treatment method and other components of the vehicle such as the filter 500 and the temperature sensor 910 according to the embodiment of the present invention are known to ordinary technicians in the field and will not be described in detail here.

[0158] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0159] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A wastewater treatment device for a fuel cell engine, characterized in that: include: a water tank, the water tank being connected to a drain port of the fuel cell engine; A liquid level sensor, the liquid level sensor is arranged in the water tank, and the liquid level sensor is used to detect the amount of wastewater in the water tank; A water pump, the water pump is used to transport the waste water in the water tank to a cooling system, the cooling system is suitable for cooling the fuel cell engine; A controller is electrically connected to the liquid level sensor and the water pump, and is used to control the start and stop of the water pump according to the working power of the fuel cell engine and the detection result of the liquid level sensor.

2. The wastewater treatment device according to claim 1, characterized in that: The water pump and / or the controller are arranged in the water tank; The interior of the water tank is hollow to form a receiving chamber, and the receiving chamber is suitable for receiving wastewater. The bottom wall of the receiving chamber is provided with a groove. The liquid level sensor is a float level gauge, and the float of the float level gauge is arranged in the groove.

3. The wastewater treatment device according to claim 1, characterized in that: A partition plate is arranged in the water tank, and the partition plate extends along the length direction and / or width direction of the water tank to separate a plurality of accommodating spaces in the water tank, and the plurality of accommodating spaces are interconnected.

4. The wastewater treatment device according to claim 1, characterized in that: The water tank is provided with a water receiving pipe, which has at least a first interface, a second interface and a third interface that are interconnected. The first interface is connected to the drain port of the fuel cell engine, the second interface is connected to the water tank, and the third interface is formed as an exhaust port.

5. The wastewater treatment device according to claim 1, characterized in that: The water tank is provided with a fourth interface and a fifth interface, the fourth interface is suitable for connecting to an external water source to form a water inlet, and the fifth interface is formed as a water outlet.

6. The wastewater treatment device according to claim 5, characterized in that: The water tank is also provided with a temperature sensor, which is used to detect the temperature of the wastewater. A drain valve is provided at the drain outlet. The drain valve and the temperature sensor are electrically connected to the controller respectively. The controller is used to control the action of the drain valve according to the detection result of the temperature sensor or the liquid level sensor.

7. The wastewater treatment device according to claim 1, characterized in that: It also includes a filter. The water pump is connected to the water tank through a connecting pipe. The filter is arranged on the connecting pipe. The filter is used to filter the waste water flowing through the connecting pipe.

8. A wastewater treatment method based on the wastewater treatment device according to any one of claims 1 to 7, characterized in that: include: Determining that the fuel cell engine has auxiliary heat dissipation requirements and determining that the wastewater treatment device meets the auxiliary heat dissipation conditions; Control the water pump to start.

9. The wastewater treatment method according to claim 8, characterized in that: The auxiliary heat dissipation requirement of the fuel cell engine is: the working power P of the fuel cell engine satisfies: P>P1, and P1 is a first preset power; or the working power P of the fuel cell engine satisfies: P2<P≤P1, and P2 is a second preset power; The auxiliary heat dissipation condition of the wastewater treatment device is: the wastewater liquid level in the water tank is greater than the first liquid level.

10. The wastewater treatment method according to claim 8, characterized in that: The wastewater treatment device comprises a temperature sensor, which is arranged on the water tank for detecting the temperature of the wastewater. The water tank is provided with a drain port, and the drain port is provided with a drain valve. The wastewater treatment method further comprises: Determining that the water tank meets the drainage condition; Controlling the drain valve to open; Wherein, the drainage condition is: the wastewater level in the water tank is greater than the second liquid level; and / or the temperature of the wastewater is less than T1, where T1 is a first preset temperature.

11. A vehicle, characterized in that: Comprising the wastewater treatment device according to any one of claims 1-7.

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