Recovery device for moisture in tail gas of fuel cell vehicle and control method of recovery device

Abstract

The invention relates to the technical field of fuel cells, and provides a device for recovering moisture in tail gas of a fuel cell vehicle and a control method thereof.The device for recovering the moisture in the tail gas of the fuel cell vehicle comprises a water-gas separation mechanism, a water drainage pipeline, a first control valve and a water pump, and an inlet of the water-gas separation mechanism is connected with a tail discharge pipe of the fuel cell vehicle; the water-gas separation mechanism is used for separating water and gas in the tail gas and is provided with a gas outlet and a water outlet; the drainage pipeline is connected with the drainage port and provided with a first drainage end and a second drainage end, the first drainage end extends to a brake hub of the fuel cell vehicle, and the second drainage end drains water to the ground; the first control valve is arranged on the water drainage pipeline and can control water in the water-gas separation mechanism to be drained through any one of the first water drainage end and the second water drainage end. Thus, water in the tail gas of the fuel cell vehicle is separated out and used for cooling the brake hub, recycling of the water in the tail gas is achieved, waste is reduced, and the influence on the road condition of the vehicle is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a device for recovering moisture in tail gas of a fuel cell vehicle and a control method thereof. Background Art

[0002] A hydrogen fuel cell is a chemical device that directly converts the chemical energy of hydrogen fuel into electrical energy. It is also called an electrochemical generator. It uses hydrogen fuel and oxygen as raw materials, has no mechanical transmission parts, and emits very little harmful gases. It has the advantages of energy saving, environmental protection, and long service life. Its application in complete vehicles has received more and more attention.

[0003] During the operation of a fuel cell, hydrogen and oxygen (from the air) undergo electrochemical reactions at the anode and cathode of the membrane electrode, respectively. The anode produces protons (H + ) and electrons, the protons generated at the anode pass through the proton exchange membrane, reach the cathode and react with oxygen to generate water. As the fuel cell is used for a long time, it is found that the gas of the fuel cell cannot be fully used in one reaction, and the water generated by the reaction and the incompletely reacted hydrogen and oxygen / air are discharged as exhaust gas. In the related art, only the hydrogen in the exhaust gas is recycled, and the water in the exhaust gas is directly discharged anywhere, resulting in a waste of water resources. Moreover, the water discharged anywhere will change the road conditions, especially in cold areas or cold weather, which will cause the road surface to be icy and slippery, etc., bringing potential road hazards and posing a threat to the safety of vehicles traveling on the road.

[0004] Therefore, how to solve the problem of water resource waste and vehicle road condition impact caused by direct discharge of water in exhaust gas of fuel cell vehicles in related technologies has become an important technical problem to be solved by those skilled in the art. Summary of the invention

[0005] The present invention provides a device for recovering water in the exhaust gas of a fuel cell vehicle and a control method thereof, so as to solve the problem of waste of water resources and influence on vehicle road conditions caused by direct discharge of water in the exhaust gas of a fuel cell vehicle in the related art, and realize the recovery and utilization of water in the exhaust gas of a fuel cell vehicle.

[0006] The present invention provides a device for recovering moisture in exhaust gas of a fuel cell vehicle, comprising: a water-gas separation mechanism, wherein the inlet of the water-gas separation mechanism is connected to the tail exhaust pipe of the fuel cell vehicle, the water-gas separation mechanism is suitable for separating water from gas in the tail gas of the fuel cell vehicle, and the water-gas separation mechanism has an exhaust port for gas discharge and a drain port for water discharge; a drainage pipeline connected to the drainage port of the water-gas separation mechanism, the drainage pipeline having a first drainage end and a second drainage end, the first drainage end extending to the brake hub of the fuel cell vehicle, and the second drainage end being suitable for draining water to the ground; A first control valve, disposed in the drainage pipeline, the first control valve being adapted to control the water in the water-gas separation mechanism to be discharged through any one of the first drainage end and the second drainage end; A water pump is adapted to provide power for the water at the first drainage end.

[0007] According to the present invention, a device for recovering moisture in exhaust gas of a fuel cell vehicle further comprises: A control mechanism, wherein the first control valve and the water pump are electrically connected to the control mechanism, and the control mechanism is suitable for controlling the rotational speeds of the first control valve and the water pump according to the operating condition information of the vehicle and the state of the brake hub, and the operating condition information of the vehicle includes a long braking condition and a short braking condition.

[0008] According to a device for recovering water in exhaust gas of a fuel cell vehicle provided by the present invention, the water-gas separation mechanism comprises: A condenser, the inlet of the condenser is connected to the tail pipe of the fuel cell vehicle; A water storage tank, wherein the inlet of the water storage tank is connected to the outlet of the condenser, the exhaust port is arranged at the top end of the water storage tank, and the drain port is arranged at the bottom end of the water storage tank.

[0009] According to a device for recovering moisture in exhaust gas of a fuel cell vehicle provided by the present invention, the first control valve can switch between a first state, a second state, a third state and a fourth state. In the first state, the first drainage end is in a conducting state and the second drainage end is in a cut-off state. In the second state, the first drainage end is in a cut-off state and the second drainage end is in a conducting state. In the third state, both the first drainage end and the second drainage end are in a cut-off state. In the fourth state, both the first drainage end and the second drainage end are in a conducting state. The water-gas separation mechanism further includes: A liquid level detection element is arranged inside the water tank, and the liquid level detection element is suitable for detecting the water level in the water tank. The liquid level detection element is electrically connected to the control mechanism, and the control mechanism is suitable for controlling the state switching of the first control valve according to the water level in the water tank and the state of the brake hub.

[0010] According to the present invention, a device for recovering moisture in exhaust gas of a fuel cell vehicle further comprises: The second control valve is disposed between the inlet of the condenser and the tail pipe of the fuel cell vehicle, and the second control valve is suitable for controlling the exhaust gas of the fuel cell vehicle to flow to any one of the condenser and the target space.

[0011] According to a device for recovering water in exhaust gas of a fuel cell vehicle provided by the present invention, the water-gas separation mechanism further comprises: A temperature detection element is disposed inside the water storage tank, and the temperature detection element is suitable for detecting the temperature of water in the water storage tank; A fan is disposed outside the condenser, and the fan is suitable for promoting the circulation of air on the outer surface of the condenser; A heating mechanism is disposed inside the water storage tank, and the heating mechanism is suitable for heating the water in the water storage tank; The temperature detection element, the fan and the heating mechanism are all electrically connected to the control mechanism, and the control mechanism is also suitable for controlling the rotation speed of the fan and the operation of the heating mechanism according to the temperature of the water in the water tank.

[0012] According to the present invention, a device for recovering moisture in exhaust gas of a fuel cell vehicle further comprises: An input mechanism is electrically connected to the control mechanism, and the input mechanism is suitable for a driver to input a state switching instruction for the first control valve. The control mechanism is also suitable for controlling the actions of the first control valve and the water pump according to the state switching instruction.

[0013] The present invention also provides a control method for a device for recovering moisture in exhaust gas of a fuel cell vehicle. Based on the device for recovering moisture in exhaust gas of a fuel cell vehicle as described above, the control method for the device for recovering moisture in exhaust gas of a fuel cell vehicle comprises: Get the status of the brake hub and the water level in the water tank; Controlling the state switching of the first control valve and the second control valve according to the state of the brake hub and the water level in the water tank; Wherein, when the water level in the water tank is lower than a first preset water level, the first control valve is controlled to switch to a third state, and the state of the second control valve is controlled so that the exhaust gas of the fuel cell vehicle can flow to the condenser; When the water level in the water tank is higher than the first preset water level and lower than the second preset water level, according to the state of the brake hub, the first control valve is controlled to switch between the first state and the third state, and the state of the second control valve is controlled so that the exhaust gas of the fuel cell vehicle can flow to the condenser, wherein the second preset water level is higher than the first preset water level; When the water level in the water tank is higher than the second preset water level, the drainage requirement of the road condition where the brake wheel hub is located is obtained; if the road condition where the brake wheel hub is located allows drainage, the first control valve is controlled to switch between the second state and the fourth state according to the state of the brake wheel hub; if the road condition where the brake wheel hub is located prohibits drainage, the state of the second control valve is controlled so that the exhaust gas of the fuel cell vehicle can flow to the target space, and at the same time, the first control valve is controlled to switch between the first state and the third state according to the state of the brake wheel hub.

[0014] According to a control method for a device for recovering water in exhaust gas of a fuel cell vehicle provided by the present invention, the water vapor separation mechanism of the device for recovering water in exhaust gas of the fuel cell vehicle further includes a temperature detection element, a fan and a heating mechanism, and the control method for the device for recovering water in exhaust gas of the fuel cell vehicle further includes: Obtaining the water temperature in the water storage tank; The operation of the fan and the heating mechanism is controlled according to the water temperature in the water tank. If the water temperature in the water tank is lower than the first preset water temperature, the heating mechanism is controlled to operate and the fan is controlled to stop operating; if the water temperature in the water tank is higher than the second preset water temperature, the heating mechanism is controlled to stop operating and the fan is controlled to operate.

[0015] According to the present invention, a control method for a device for recovering moisture in exhaust gas of a fuel cell vehicle further includes: Obtaining slope data of the road condition where the brake hub is located; The rotation speed of the water pump is controlled according to the slope data of the road condition where the brake wheel hub is located.

[0016] The device for recovering water in the exhaust gas of a fuel cell vehicle provided by the present invention comprises a water-gas separation mechanism, a drainage pipeline, a first control valve and a water pump. The inlet of the water-gas separation mechanism is connected to the tail exhaust pipe of the fuel cell vehicle, and the exhaust gas of the fuel cell vehicle can enter the water-gas separation mechanism. The water-gas separation mechanism can separate the water and gas in the exhaust gas of the fuel cell vehicle. The water-gas separation mechanism has an exhaust port and a drainage port. The exhaust port is used to discharge the gas in the water-gas separation mechanism, and the drainage port is used to discharge the water in the water-gas separation mechanism. The drainage pipeline is connected to the drainage port of the water-gas separation mechanism. The drainage pipeline has a first drainage end and a second drainage end. The first control valve is arranged on the drainage pipeline. The first control valve can control the water in the water-gas separation mechanism to be discharged through any one of the first drainage end and the second drainage end. The first drainage end extends to the brake wheel hub of the fuel cell vehicle. The water pump can provide power for the water at the first drainage end, and is used to transport the water at the first drainage end to the brake wheel hub to cool the brake wheel hub. The second drainage end is used to drain water to the ground. When the brake wheel hub is braked, the action of the first control valve is controlled so that the water in the water-gas separation mechanism is discharged through the first drainage end to cool the brake wheel hub. The water is discharged to the ground only when the brake wheel hub is not braked. In this way, the water recovery device in the exhaust gas of the fuel cell vehicle provided by the present invention can separate the water in the exhaust gas of the fuel cell vehicle and use it for cooling the brake wheel hub, improve the braking performance, realize the recycling and reuse of the water in the exhaust gas of the fuel cell vehicle, reduce the waste of water resources, reduce the impact on the vehicle road conditions, and solve the problem of water waste caused by the direct discharge of water in the exhaust gas of the fuel cell vehicle and the impact on the vehicle road conditions in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The structure of the water recovery device in the exhaust gas of a fuel cell vehicle provided by the present invention is shown in FIG. Figure 1 .

[0019] Figure 2 The structure of the water recovery device in the exhaust gas of a fuel cell vehicle provided by the present invention is shown in FIG. Figure 2 .

[0020] Figure 3 The present invention is a flowchart of a control method of a device for recovering moisture in exhaust gas of a fuel cell vehicle.

[0021] Reference numerals: 1. Tail exhaust pipe of fuel cell vehicle; 2. Brake hub; 3. First control valve; 4. Water pump; 5. Control mechanism; 6. Condenser; 7. Water storage tank; 8. Temperature detection element; 9. Fan; 10. Heating mechanism; 11. Input mechanism; 12. First liquid level sensor; 13. Second liquid level sensor; 14. Main pipeline; 15. First branch pipeline; 16. Second branch pipeline; 17. Display screen; 18. Exhaust pipeline; 19. Second control valve. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Combine the following Figure 1 and Figure 2 The invention describes a device for recovering moisture in exhaust gas of a fuel cell vehicle.

[0024] like Figure 1 and Figure 2 As shown, the device for recovering moisture in exhaust gas of a fuel cell vehicle provided in an embodiment of the present invention includes a water-gas separation mechanism, a drainage pipeline, a first control valve 3 and a water pump 4.

[0025] The inlet of the water-gas separation mechanism is connected to the tail exhaust pipe 1 of the fuel cell vehicle, and the tail gas of the fuel cell vehicle can enter the water-gas separation mechanism, and the water-gas separation mechanism can separate the water and gas in the tail gas of the fuel cell vehicle. The water-gas separation mechanism has an exhaust port and a drain port, the exhaust port is used to discharge the gas in the water-gas separation mechanism, and the drain port is used to discharge the water in the water-gas separation mechanism.

[0026] The exhaust port can be directly opened to allow the gas in the water-gas separation mechanism to be directly discharged into the external atmosphere. The exhaust port can also be connected to an exhaust pipe 18 to collect and reuse the gas in the water-gas separation mechanism.

[0027] The drainage pipeline is connected to the drainage port of the water-gas separation mechanism, and the drainage pipeline has a first drainage end and a second drainage end. The first control valve 3 is arranged in the drainage pipeline, and the first control valve 3 can control the water in the water-gas separation mechanism to be discharged through any one of the first drainage end and the second drainage end.

[0028] The first drainage end extends to the brake wheel hub 2 of the vehicle where the fuel cell vehicle is located, and the water pump 4 can provide power for the water at the first drainage end, and is used to transport the water at the first drainage end to the brake wheel hub 2 to cool the brake wheel hub 2. The second drainage end is used to drain water to the ground.

[0029] When the brake hub 2 is braked, the action of the first control valve 3 is controlled to discharge the water in the water-gas separation mechanism through the first drainage end to cool the brake hub 2. The water will be discharged to the ground only when the brake hub 2 is not braked.

[0030] With such an arrangement, the device for recovering water in the exhaust gas of a fuel cell vehicle provided in an embodiment of the present invention can separate the water in the exhaust gas of the fuel cell vehicle and use it for cooling the brake hub 2, thereby improving the braking performance, realizing the recycling and reuse of water in the exhaust gas of the fuel cell vehicle, reducing the waste of water resources, reducing the impact on vehicle road conditions, and solving the problem of waste of water resources and impact on vehicle road conditions caused by direct discharge of water in the exhaust gas of a fuel cell vehicle in related technologies.

[0031] A spray mechanism or a liquid cooling mechanism can be installed on the brake hub 2. The spray mechanism includes an atomizing nozzle, which can spray the brake disc. The atomized water contacts the brake disc, which can cool the brake disc while avoiding the formation of water flow, and will not affect the braking distance. The liquid cooling mechanism includes a liquid cooling plate, which is arranged on the brake disc and is used to perform heat exchange with the brake disc and perform liquid cooling on the brake disc. In this embodiment, the first drainage end of the drainage pipeline can be connected to the atomizing nozzle and the liquid cooling plate, and the water pump 4 can transport water to the atomizing nozzle and the liquid cooling plate.

[0032] In the embodiment of the present invention, the device for recovering moisture in exhaust gas of a fuel cell vehicle further includes a control mechanism 5, and the first control valve 3 and the water pump 4 are both electrically connected to the control mechanism 5. The control mechanism 5 can obtain the state of the brake hub 2 and the working condition information of the vehicle, and control the rotation speed of the first control valve 3 and the water pump 4 according to the working condition information of the vehicle and the state of the brake hub 2.

[0033] Specifically, when the brake wheel hub 2 is in a braking state, the control mechanism 5 controls the first control valve 3 to operate to make the first drainage end conductive and the second drainage end cut off, and at the same time controls the water pump 4 to operate so as to transport the water in the water-gas separation mechanism to the brake wheel hub 2 to cool the brake wheel hub 2. When the brake wheel hub 2 is in a non-braking state, the control mechanism 5 controls the first control valve 3 to operate to make the first drainage end cut off, so that the second drainage end can be in a conductive state to discharge water to the ground, or the second drainage end can be in a cut-off state to store water in the water-gas separation mechanism to avoid direct discharge of water, and then discharged through the first drainage end when the brake wheel hub 2 brakes next time.

[0034] The vehicle's operating condition information includes long braking conditions and short braking conditions. Among them, the long braking condition refers to the condition of braking for a long time or a long distance, such as a long downhill, a mountain road, or a section that requires frequent deceleration. Under this condition, long-term braking is required, which will cause the brake system to overheat, reduce braking efficiency, and even brake failure. When braking under this condition, the water pump 4 can be controlled to run at a higher speed to increase the water supply to the spray mechanism and the liquid cooling mechanism, improve the spray cooling efficiency and liquid cooling efficiency, and reduce the temperature rise of the brake disc.

[0035] The short braking condition refers to a condition in which braking is performed in a short time. Braking operations may occur frequently, but the duration of each braking operation is short, such as city driving, intersections controlled by traffic lights, traffic jams, or sections that require frequent starts and stops. In this condition, frequent braking or long-term braking is not required, so the water pump 4 can be controlled to operate at a lower speed to reduce the amount of water supplied to the spray mechanism and the liquid cooling mechanism.

[0036] In other embodiments, the device for recovering moisture in exhaust gas of a fuel cell vehicle further includes an input mechanism 11, which is electrically connected to the control mechanism 5. The input mechanism 11 is used for the driver to input a state switching instruction for the first control valve 3. The control mechanism 5 can also control the operation of the first control valve 3 and the water pump 4 according to the state switching instruction.

[0037] At this time, when the driver brakes the brake hub 2, he can simultaneously input a state switching instruction for the first control valve 3 to the input mechanism 11. Even if the control mechanism 5 cannot obtain the state of the brake hub 2, it can ensure that water is supplied to the brake hub 2 in time when the brake hub 2 is in the braking state.

[0038] Moreover, when the brake hub 2 is in a non-braking state, the first control valve 3 controls the water in the water-gas separation mechanism to be unable to be discharged through the first drainage end. At this time, the driver can operate the input mechanism 11 as needed to discharge the water in the water-gas separation mechanism as needed.

[0039] Specifically, the input mechanism 11 includes a button, and the button is arranged on a dashboard of a vehicle cab.

[0040] Only one button may be provided, and the state of the first control valve 3 may be determined according to the number of consecutive presses of the button. For example, if the button is pressed once continuously, it means that the first control valve 3 needs to be switched to a state where the first drainage end is turned on and the second drainage end is turned off; if the button is pressed twice continuously, it means that the first control valve 3 needs to be switched to a state where the first drainage end is turned off and the second drainage end is turned on; if the button is pressed three times continuously, it means that the first control valve 3 needs to be switched to a state where both the first drainage end and the second drainage end are turned off; if the button is pressed four times continuously, it means that the first control valve 3 needs to be switched to a state where both the first drainage end and the second drainage end are turned on.

[0041] Four buttons may also be provided, each button corresponding to a state, and pressing different buttons indicates that the first control valve 3 needs to be switched to a different state.

[0042] At the same time, the state of the first control valve 3 or the drainage state can also be displayed in real time on the display screen 17 in the cab of the vehicle so that the driver can understand it in real time.

[0043] In an embodiment of the present invention, the water-gas separation mechanism includes a condenser 6 and a water tank 7, the inlet of the condenser 6 is connected to the tail exhaust pipe 1 of the fuel cell vehicle, the inlet of the water tank 7 is connected to the outlet of the condenser 6, the exhaust port is arranged at the top end of the water tank 7, and the drain port is arranged at the bottom end of the water tank 7.

[0044] The exhaust gas of the fuel cell vehicle first passes through the condenser 6 and then enters the water tank 7. The water in the exhaust gas of the fuel cell vehicle condenses in the condenser 6 to form liquid water. The liquid water and gas enter the water tank 7. The liquid water gathers at the bottom of the water tank 7 and can be discharged through the drain port at the bottom of the water tank 7. The gas gathers at the top of the water tank 7 and can be discharged through the exhaust port at the top of the water tank 7.

[0045] Liquid water and gas enter the water tank 7 and separate themselves. The water tank 7 has the function of storing the separated water. When the brake hub 2 is in a non-braking state, the separated water can be stored in the water tank 7 to avoid direct discharge of water. When the brake hub 2 is in a braking state, the water is discharged to the first drainage end of the drainage pipeline to realize the on-demand use of the separated water.

[0046] In this embodiment, the water vapor separation mechanism further includes a temperature detection element 8 and a fan 9. The temperature detection element 8 is arranged inside the water storage tank 7, and the temperature detection element 8 is used to detect the temperature of the water in the water storage tank 7. The temperature detection element 8 can be, but is not limited to, a temperature sensor. The fan 9 is arranged outside the condenser 6, and the operation of the fan 9 can promote the circulation of air on the outer surface of the condenser 6, so as to accelerate the condensation of water in the condenser 6 and reduce the temperature of the water flowing out of the condenser 6.

[0047] The temperature detection element 8 and the fan 9 are both electrically connected to the control mechanism 5, and the control mechanism 5 can also control the speed of the fan 9 according to the temperature of the water in the water tank 7. When the temperature of the water in the water tank 7 is high, it is necessary to control the fan 9 to run at a higher speed to reduce the temperature of the condensed water and the temperature of the water in the water tank 7 to improve the cooling effect on the brake hub 2. When the temperature of the water in the water tank 7 drops to a preset value, the fan 9 is controlled to reduce its speed.

[0048] In this embodiment, the water vapor separation mechanism further includes a heating mechanism 10, which is disposed inside the water tank 7 and can heat the water in the water tank 7. In cold regions or cold weather, the temperature of the environment in which the water tank 7 is located is low, and the water temperature in the water tank 7 is also low. If the water temperature in the water tank 7 drops below the freezing point of water, the water will freeze and cannot be discharged from the water tank 7, affecting the water supply to the brake hub 2. At this time, the heating mechanism 10 can be used to heat the water in the water tank 7 to keep the water temperature above the freezing point of water to prevent the water from freezing.

[0049] The heating mechanism 10 is electrically connected to the control mechanism 5 , and the control mechanism 5 can control the operation of the heating mechanism 10 according to the temperature of the water in the water storage tank 7 , thereby realizing automatic control of the heating mechanism 10 .

[0050] The heating mechanism 10 can be, but is not limited to, an electric heater.

[0051] In some embodiments, the heating power of the heating mechanism 10 can also be controlled according to the temperature of the water in the water tank 7 to control the heating efficiency and shorten the heating time.

[0052] In the embodiment of the present invention, the first control valve 3 can be switched between the first state, the second state, the third state and the fourth state. When the first control valve 3 is switched to the first state, the first drainage end is connected and the second drainage end is cut off; when the first control valve 3 is switched to the second state, the first drainage end is cut off and the second drainage end is connected; when the first control valve 3 is switched to the third state, both the first drainage end and the second drainage end are cut off; when the first control valve 3 is switched to the fourth state, both the first drainage end and the second drainage end are connected.

[0053] In a specific embodiment, a four-position three-way electromagnetic reversing valve can be selected as the first control valve 3. The four-position three-way electromagnetic reversing valve has an inlet, a first outlet and a second outlet. The valve core of the four-position three-way electromagnetic reversing valve can be switched in four working positions. When the valve core of the four-position three-way electromagnetic reversing valve is in different working positions, the connection states of the first outlet, the second outlet and the inlet are different.

[0054] The drainage pipeline includes a main pipeline 14, a first branch pipeline 15 and a second branch pipeline 16. The head end of the main pipeline 14 is connected to the drainage port of the water storage tank 7, and the tail end of the main pipeline 14 is connected to the inlet of the four-position three-way electromagnetic reversing valve. The head end of the first branch pipeline 15 is connected to the first outlet of the four-position three-way electromagnetic reversing valve, and the tail end of the first branch pipeline 15 serves as the first discharge end. The head end of the second branch pipeline 16 is connected to the second outlet of the four-position three-way electromagnetic reversing valve, and the tail end of the second branch pipeline 16 serves as the second discharge end.

[0055] In this embodiment, the water-gas separation mechanism further includes a liquid level detection element, which is disposed inside the water storage tank 7 and is used to detect the water level in the water storage tank 7. The liquid level detection element may be, but is not limited to, a liquid level sensor, and the liquid level detection element includes a first liquid level sensor 12 and a second liquid level sensor 13, wherein the height position of the first liquid level sensor 12 in the water storage tank 7 is lower than the height position of the second liquid level sensor 13 in the water storage tank 7.

[0056] When the water level in the water tank 7 is lower than the height position of the first liquid level sensor 12, the first control valve 3 is controlled to switch to the third state to prevent water from being discharged.

[0057] When the water level in the water tank 7 is higher than the height position of the first liquid level sensor 12 and lower than the height position of the second liquid level sensor 13, if the brake hub 2 is in a braking state, the first control valve 3 is controlled to switch to the first state to discharge water to the brake hub 2 as needed; if the brake hub 2 is in a non-braking state, the first control valve 3 is controlled to switch to the third state.

[0058] When the water level in the water tank 7 is higher than the height position of the second liquid level sensor 13, the water in the water tank 7 needs to be discharged in time. If the brake hub 2 is in a non-braking state, the first control valve 3 is controlled to switch to the second state to discharge the water in the water tank 7 directly to the ground; if the brake hub 2 is in a braking state, the first control valve 3 is controlled to switch to the fourth state to discharge the water in the water tank 7 to the ground and the brake hub 2 at the same time.

[0059] The liquid level detection element is electrically connected to the control mechanism 5, and the control mechanism 5 can control the state switching of the first control valve 3 according to the water level in the water tank 7 and the state of the brake hub 2, so as to realize automatic control of the moisture recovery device in the exhaust gas of the fuel cell vehicle, and control the water level in the water tank 7 between the first liquid level sensor 12 and the second liquid level sensor 13.

[0060] In a further embodiment, in the embodiment of the present invention, the device for recovering water in the exhaust gas of a fuel cell vehicle further includes a second control valve 19, which is disposed between the inlet of the condenser 6 and the tail pipe 1 of the fuel cell vehicle, and the second control valve 19 is used to control the exhaust gas of the fuel cell vehicle to flow to either the condenser or the target space. The target space can be an atmospheric environment or a collection device specifically used for collection, which is not specifically limited here.

[0061] The flow direction of the exhaust gas of the fuel cell vehicle can be controlled by the second control valve 19 , so that the exhaust gas of the fuel cell vehicle can flow to the target space alone, or can flow to the condenser 6 alone. Specifically, the control can be carried out according to the water level in the water tank 7 .

[0062] For example, when the water level in the water tank 7 is low, the second control valve 19 can be controlled to allow the exhaust gas of the fuel cell vehicle to flow to the condenser 6 alone, so that the water in the exhaust gas of the fuel cell vehicle can be separated and stored in the water tank 7. When the water level in the water tank 7 is high, the second control valve 19 can be controlled to allow the exhaust gas of the fuel cell vehicle to flow to the target space alone, so that the exhaust gas of the fuel cell vehicle can be directly discharged, and the water in the exhaust gas of the fuel cell vehicle can be prevented from entering the water tank 7.

[0063] On the other hand, an embodiment of the present invention also provides a control method for a device for recovering moisture in exhaust gas of a fuel cell vehicle. The control method for a device for recovering moisture in exhaust gas of a fuel cell vehicle described below is based on the device for recovering moisture in exhaust gas of a fuel cell vehicle provided by any of the above embodiments, and the control method for a device for recovering moisture in exhaust gas of a fuel cell vehicle described below can correspond to the device for recovering moisture in exhaust gas of a fuel cell vehicle described above.

[0064] like Figure 3 As shown, the control method of the device for recovering moisture in exhaust gas of a fuel cell vehicle provided in an embodiment of the present invention includes steps 110 to 120.

[0065] Step 110: Obtain the state of the brake hub and the water level in the water tank.

[0066] Step 120: Control the state switching of the first control valve and the second control valve according to the state of the brake hub and the water level in the water tank.

[0067] It can be understood that the control method of the device for recovering moisture in exhaust gas of a fuel cell vehicle provided in the embodiment of the present invention mainly controls the state switching of the first control valve 3 and the second control valve 19 according to the state of the brake hub 2 and the water level in the water tank 7.

[0068] Specifically, a certain water level range is preset for the water level of the water storage tank 7, the lower limit of the water level range is a first preset water level, the upper limit of the water level range is a second preset water level, and the second preset water level is higher than the first preset water level.

[0069] When the water level in the water tank 7 is lower than the first preset water level, the first control valve 3 is controlled to switch to the third state, and the state of the second control valve 19 is controlled to allow the exhaust gas of the fuel cell vehicle to flow to the condenser 6. At this time, the water in the water tank 7 is prevented from being discharged, and the water in the exhaust gas of the fuel cell vehicle is separated and stored in the water tank 7 to increase the water level in the water tank 7.

[0070] When the water level in the water tank 7 is higher than the first preset water level, and the water level in the water tank 7 is lower than the second preset water level, the first control valve 3 is controlled to switch between the first state and the third state according to the state of the brake hub 2, and the state of the second control valve 19 is controlled so that the exhaust gas of the fuel cell vehicle can flow to the condenser 6. At this time, the water in the exhaust gas of the fuel cell vehicle can be separated and stored in the water tank 7, and the discharge of the water in the water tank 7 can be controlled as needed to cool the brake hub 2.

[0071] When the water level in the water tank 7 is higher than the second preset water level, the drainage requirements of the road conditions where the brake hub 2 is located are obtained. Some road conditions allow drainage, and some road conditions do not allow drainage. If the road conditions where the brake hub 2 is located allow drainage, then according to the state of the brake hub 2, the first control valve 3 is controlled to switch between the second state and the fourth state to drain the water in the water tank 7 to the ground or the brake hub 2. If the road conditions where the brake hub 2 is located prohibit drainage, the state of the second control valve 19 is controlled so that the exhaust gas of the fuel cell vehicle can flow to the target space, avoiding the recovery of water in the exhaust gas of the fuel cell vehicle, and at the same time, according to the state of the brake hub 2, the first control valve 3 is controlled to switch between the first state and the third state to avoid water discharge.

[0072] The derivation process of the beneficial effects of the control method of the moisture recovery device in the exhaust gas of a fuel cell vehicle in the embodiment of the present invention is generally similar to the derivation process of the beneficial effects of the moisture recovery device in the exhaust gas of the above-mentioned fuel cell vehicle, so it will not be repeated here.

[0073] In a further embodiment, in the control method of the device for recovering moisture in exhaust gas of a fuel cell vehicle, it is also necessary to obtain the slope data of the road condition where the brake hub 2 is located, and then control the rotation speed of the water pump 4 according to the slope data of the road condition where the brake hub 2 is located.

[0074] The slope data includes the slope length and the slope size. In downhill conditions, long braking is generally required. For downhill conditions with large and long slopes, the amount of heat generated by the brake hub 2 during braking is large, and the water supply to the brake hub 2 needs to be increased. At this time, the speed of the water pump 4 needs to be increased. For downhill conditions with small and short slopes, the amount of heat generated by the brake hub 2 during braking is small, and the water supply to the brake hub 2 needs to be reduced. At this time, the speed of the water pump 4 needs to be reduced.

[0075] A map navigation system is installed on the fuel cell vehicle. When the vehicle is driving, the system can obtain the road condition information such as slope data ahead of the vehicle in advance based on the map information.

[0076] In some embodiments, the water vapor separation mechanism of the device for recovering water in exhaust gas of a fuel cell vehicle further includes a temperature detection element 8, a fan 9 and a heating mechanism 10. The temperature detection element 8 is used to detect the water temperature in the water storage tank 7. The fan 9 is used to promote the circulation of air on the outer surface of the condenser 6 to accelerate the condensation of water in the condenser 6 and reduce the temperature of the water flowing out of the condenser 6, that is, the temperature of the water in the water storage tank 7 can be reduced. The heating mechanism 10 is used to heat the water in the water storage tank 7.

[0077] In this embodiment, in the control method of the device for recovering moisture in exhaust gas of a fuel cell vehicle, it is also necessary to obtain the water temperature in the water tank 7, and then control the operation of the fan 9 and the heating mechanism 10 according to the water temperature in the water tank 7. If the water temperature in the water tank 7 is lower than the first preset water temperature, the heating mechanism 10 is controlled to operate and the fan 9 is controlled to stop operating to increase the temperature of the water in the water tank 7. If the water temperature in the water tank 7 is higher than the second preset water temperature, the heating mechanism 10 is controlled to stop operating and the fan 9 is controlled to operate to reduce the temperature of the water in the water tank 7.

[0078] With such an arrangement, the water temperature in the water tank 7 can be controlled within a certain temperature range, the water in the water tank 7 can be prevented from freezing, and the temperature of the water in the water tank 7 can be prevented from being too high, thereby ensuring that the water in the water tank 7 can be used to effectively cool the brake hub 2.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for recovering moisture from exhaust gas of a fuel cell vehicle, characterized in that: include: a water-gas separation mechanism, the inlet of which is connected to the tail exhaust pipe (1) of the fuel cell vehicle, the water-gas separation mechanism being suitable for separating water from gas in the tail gas of the fuel cell vehicle, the water-gas separation mechanism having an exhaust port for gas discharge and a drain port for water discharge; a drainage pipeline connected to the drainage port of the water-gas separation mechanism, the drainage pipeline having a first drainage end and a second drainage end, the first drainage end extending to the brake wheel hub (2) of the fuel cell vehicle, and the second drainage end being suitable for draining water to the ground; A first control valve (3) is arranged in the drainage pipeline, the first control valve (3) being suitable for controlling the water in the water-gas separation mechanism to be discharged through any one of the first drainage end and the second drainage end; A water pump (4) is suitable for providing power for the water at the first drainage end.

2. The device for recovering water in exhaust gas of a fuel cell vehicle according to claim 1, characterized in that: Also includes: A control mechanism (5), wherein the first control valve (3) and the water pump (4) are both electrically connected to the control mechanism (5), and the control mechanism (5) is suitable for controlling the rotation speed of the first control valve (3) and the water pump (4) according to the working condition information of the vehicle and the state of the brake hub (2), wherein the working condition information of the vehicle includes a long braking condition and a short braking condition.

3. The device for recovering water in exhaust gas of a fuel cell vehicle according to claim 2, characterized in that: The water-gas separation mechanism comprises: A condenser (6), the inlet of the condenser (6) being connected to the tail exhaust pipe (1) of the fuel cell vehicle; A water storage tank (7), wherein the inlet of the water storage tank (7) is connected to the outlet of the condenser (6), the exhaust port is arranged at the top end of the water storage tank (7), and the drain port is arranged at the bottom end of the water storage tank (7).

4. The device for recovering water in exhaust gas of a fuel cell vehicle according to claim 3, characterized in that: The first control valve (3) is switchable between a first state, a second state, a third state and a fourth state. In the first state, the first drainage end is in a conducting state and the second drainage end is in a blocking state. In the second state, the first drainage end is in a blocking state and the second drainage end is in a conducting state. In the third state, both the first drainage end and the second drainage end are in a blocking state. In the fourth state, both the first drainage end and the second drainage end are in a conducting state. The water-gas separation mechanism further comprises: A liquid level detection element is arranged inside the water tank (7), the liquid level detection element is suitable for detecting the water level in the water tank (7), the liquid level detection element is electrically connected to the control mechanism (5), and the control mechanism (5) is suitable for controlling the state switching of the first control valve (3) according to the water level in the water tank (7) and the state of the brake hub (2).

5. The device for recovering water in exhaust gas of a fuel cell vehicle according to claim 4, characterized in that: Also includes: A second control valve (19) is arranged between the inlet of the condenser (6) and the tail pipe (1) of the fuel cell vehicle, and the second control valve (19) is suitable for controlling the exhaust gas of the fuel cell vehicle to flow to either the condenser (6) or the target space.

6. The device for recovering water in exhaust gas of a fuel cell vehicle according to claim 3, characterized in that: The water-gas separation mechanism also includes: A temperature detection element (8) is arranged inside the water storage tank (7), and the temperature detection element (8) is suitable for detecting the temperature of water in the water storage tank (7); A fan (9) is arranged outside the condenser (6), and the fan (9) is suitable for promoting the circulation of air on the outer surface of the condenser (6); A heating mechanism (10) is arranged inside the water storage tank (7), and the heating mechanism (10) is suitable for heating water in the water storage tank (7); The temperature detection element (8), the fan (9) and the heating mechanism (10) are all electrically connected to the control mechanism (5), and the control mechanism (5) is also suitable for controlling the rotation speed of the fan (9) and the operation of the heating mechanism (10) according to the temperature of the water in the water storage tank (7).

7. The device for recovering water in exhaust gas of a fuel cell vehicle according to claim 2, characterized in that: Also includes: An input mechanism (11) is electrically connected to the control mechanism (5), and the input mechanism (11) is suitable for a driver to input a state switching instruction for the first control valve (3). The control mechanism (5) is also suitable for controlling the actions of the first control valve (3) and the water pump (4) according to the state switching instruction.

8. A control method for a device for recovering water in exhaust gas of a fuel cell vehicle, characterized in that: Based on the device for recovering moisture in exhaust gas of a fuel cell vehicle according to claim 5, a control method of the device for recovering moisture in exhaust gas of a fuel cell vehicle includes: Get the status of the brake hub and the water level in the water tank; Controlling the state switching of the first control valve and the second control valve according to the state of the brake hub and the water level in the water tank; Wherein, when the water level in the water tank is lower than a first preset water level, the first control valve is controlled to switch to a third state, and the state of the second control valve is controlled so that the exhaust gas of the fuel cell vehicle can flow to the condenser; When the water level in the water tank is higher than the first preset water level and lower than the second preset water level, according to the state of the brake hub, the first control valve is controlled to switch between the first state and the third state, and the state of the second control valve is controlled so that the exhaust gas of the fuel cell vehicle can flow to the condenser, wherein the second preset water level is higher than the first preset water level; When the water level in the water tank is higher than the second preset water level, the drainage requirement of the road condition where the brake wheel hub is located is obtained; if the road condition where the brake wheel hub is located allows drainage, the first control valve is controlled to switch between the second state and the fourth state according to the state of the brake wheel hub; if the road condition where the brake wheel hub is located prohibits drainage, the state of the second control valve is controlled so that the exhaust gas of the fuel cell vehicle can flow to the target space, and at the same time, the first control valve is controlled to switch between the first state and the third state according to the state of the brake wheel hub.

9. The control method of the device for recovering water in exhaust gas of a fuel cell vehicle according to claim 8, characterized in that: The water vapor separation mechanism of the device for recovering water in exhaust gas of a fuel cell vehicle further includes a temperature detection element, a fan and a heating mechanism. The control method of the device for recovering water in exhaust gas of a fuel cell vehicle further includes: Obtaining the water temperature in the water storage tank; The operation of the fan and the heating mechanism is controlled according to the water temperature in the water tank. If the water temperature in the water tank is lower than the first preset water temperature, the heating mechanism is controlled to operate and the fan is controlled to stop operating; if the water temperature in the water tank is higher than the second preset water temperature, the heating mechanism is controlled to stop operating and the fan is controlled to operate.

10. The control method of the device for recovering water in exhaust gas of a fuel cell vehicle according to claim 8, characterized in that: Also includes: Obtaining slope data of the road condition where the brake hub is located; The rotation speed of the water pump is controlled according to the slope data of the road condition where the brake wheel hub is located.

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