A fuel cell inlet temperature and humidity control device and system

Abstract

The application provides a fuel cell air inlet temperature and humidity adjusting device and system, which comprises a box for storing liquid and at least two air inlets; the air outlet end of each air inlet extends into the box, and the air outlet ends of the at least two air inlets are different from the liquid level; the air inlet end of each air inlet is provided with an air inlet flow adjusting valve; the box is provided with an air outlet, a water inlet and a water outlet; the air outlet is higher than the liquid level, and the water outlet is lower than the liquid level. The fuel cell air inlet temperature and humidity adjusting device can actively adjust the temperature and humidity of the air entering the fuel cell to meet the requirements of the fuel cell under different working conditions.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fuel cells, and more particularly relates to a fuel cell air inlet temperature and humidity adjusting device and system. BACKGROUND

[0002] Generally, a fuel cell engine or power generation device has an intercooler and a humidifier to cool and humidify the air entering the fuel cell, so that the temperature and humidity parameters of the air entering the fuel cell meet the requirements. Generally, the fuel cell engine or power generation device is provided with air by an air compressor. Under certain pressure conditions, the greater the outlet flow of the air compressor, the higher the temperature. The fuel cell engine or power generation device generally uses an intercooler and a humidifier to adjust the temperature and humidity of the air. Under different current conditions, the air flow entering the fuel cell is different. Currently, the intercooler and the humidifier used in this scenario cannot actively adjust the temperature and humidity. This will result in the temperature and humidity of the air entering the fuel cell not meeting the requirements of the fuel cell under any operating conditions. SUMMARY

[0003] The application aims to provide a fuel cell air inlet temperature and humidity adjusting device and system to solve the technical problem that the intercooler and the humidifier in the prior art cannot actively adjust the temperature and humidity of the air entering the fuel cell.

[0004] To achieve the above-mentioned purpose, in a first aspect, the application provides a fuel cell air inlet temperature and humidity adjusting device, comprising a tank for storing liquid and at least two air inlet pipes; wherein the air outlet end of each air inlet pipe extends into the tank, and the air outlet ends of the at least two air inlet pipes are different from the liquid level; the air inlet end of each air inlet pipe is provided with an air inlet flow adjusting valve; the tank is provided with an air outlet, a water inlet and a water outlet; the air outlet is higher than the liquid level, and the water outlet is lower than the liquid level.

[0005] Further, an air outlet pipe is connected to the air outlet, and an air outlet gas temperature sensor and an air outlet gas humidity sensor are arranged on the air outlet pipe.

[0006] Further, an air flow meter is arranged on the air outlet pipe.

[0007] Further, a gas inlet collecting pipe is further included, which is in communication with the air inlet end of each air inlet pipe.

[0008] Further, a water inlet pipe is connected to the water inlet, and a water inlet temperature sensor is arranged on the water inlet pipe.

[0009] Further, a water inlet flow adjusting valve is arranged on the water inlet pipe.

[0010] Further, the water inlet pipe is provided with a water inlet flow meter.

[0011] Further, the water outlet pipe is provided with a water outlet flow meter.

[0012] Further, the water outlet pipe is provided with a water outlet flow meter.

[0013] Further, the water outlet pipe is provided with a water outlet flow meter.

[0014] Further, the air outlet end of each air inlet pipe is composed of a plurality of mutually independent sub-air outlet holes, and each sub-air outlet hole is in communication with the air inlet end of the air inlet pipe.

[0015] Further, the inner diameter size of the sub-air outlet hole is 1mm≤D≤40mm.

[0016] Further, the bottom of the box is flush, and the at least two air inlet pipes include a first air inlet pipe, a second air inlet pipe and a third air inlet pipe; the air inlet end of the first air inlet pipe is provided with a first air inlet flow regulating valve, the air inlet end of the second air inlet pipe is provided with a second air inlet flow regulating valve, and the air inlet end of the third air inlet pipe is provided with a third air inlet flow regulating valve.

[0017] The height of the air outlet end of the first air inlet pipe from the bottom of the box is H1, the height of the air outlet end of the second air inlet pipe from the bottom of the box is H2, and the height of the air outlet end of the third air inlet pipe from the bottom of the box is H3; wherein H1>H2>H3.

[0018] Further, the box is built-in with a heater and / or a heat exchanger.

[0019] Further, the box is built-in with a liquid level sensor.

[0020] In a second aspect, the application also provides a fuel cell air inlet temperature and humidity adjusting system, which comprises a fuel cell and an air system, the air system comprising an air compressor and the fuel cell air inlet temperature and humidity adjusting device as described in any one of the above aspects, the air outlet of the air compressor being in communication with the air inlet pipe, the air outlet being in communication with the air inlet of the fuel cell, and the water outlet of the fuel cell being in communication with the water inlet of the air inlet pipe.

[0021] Further, the water outlet of the fuel cell air inlet temperature and humidity adjusting device is in communication with the water inlet end of the water outlet pipe.

[0022] Further, the water outlet of the fuel cell air inlet temperature and humidity adjusting device is in communication with the external environment.

[0023] Compared with the prior art, the application has the following technical effects:

[0024] 1.The fuel cell air inlet temperature and humidity adjusting device of the application adjusts the air entering the air inlet pipe by water in the box, adjusts the degree of humidification of the air by adjusting the air flow entering different air inlet pipes, and achieves the purpose of adjusting the humidity of the outlet air. At the same time, by adjusting the temperature of the water in the box, the outlet air temperature of the outlet air can be adjusted. The fuel cell air inlet temperature and humidity adjusting device of the application can actively adjust the temperature and humidity of the air entering the fuel cell to meet the temperature and humidity requirements of the fuel cell under different working conditions. The fuel cell air inlet temperature and humidity adjusting device of the application can be widely used in energy storage power stations, fuel cell vehicles, and other humidification industries.

[0025] 2.The outlet end of the air inlet pipe of the application is provided with a plurality of sub-outlet holes, so that the outlet air is more dispersed, the contact area of the gas and the liquid is increased, and the humidification and heat exchange effect is more excellent.

[0026] 3.The heater and / or heat exchanger built in the box of the application can heat the water under low temperature environment (such as-30℃ and below), so as to realize the temperature rise of the air flowing through the water, so as to meet the temperature requirement of the air entering the fuel cell, protect the fuel cell, and prolong its service life.

[0027] 4.The fuel cell air inlet temperature and humidity adjusting system of the application has the same beneficial effects as the fuel cell air inlet temperature and humidity adjusting device of the application, which will not be described here. At the same time, the water of the application comes from the water generated by the fuel cell (carrying a certain temperature), and according to the requirement, the water with appropriate temperature can be introduced into the box to realize the cooling (such as summer or tropical area) and heating (such as winter or cold area) of the air flowing through it, so as to meet the temperature and humidity requirement of the air entering the fuel cell, and save energy and energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 A structure schematic view of a fuel cell air inlet temperature and humidity adjusting device provided by the embodiment of the application;

[0030] Figure 2 Another structure schematic view of a fuel cell air inlet temperature and humidity adjusting device provided by the embodiment of the application;

[0031] Figure 3Another structural schematic view of a fuel cell air inlet temperature and humidity adjusting device provided by an embodiment of the present application;

[0032] Figure 4 A structural schematic view of a fuel cell air inlet temperature and humidity adjusting system provided by an embodiment of the present application.

[0033] In the drawings, various reference numbers refer to the following list:

[0034] 1, box, 2, first air inlet pipe, 3, second air inlet pipe, 4, third air inlet pipe, 5, first air inlet flow regulating valve, 6, second air inlet flow regulating valve, 7, third air inlet flow regulating valve, 8, air outlet pipe, 9, temperature and humidity integrated sensor, 10, air flow meter, 11, water inlet pipe, 12, water inlet temperature sensor, 13, water inlet flow regulating valve, 14, water inlet flow meter, 15, water outlet pipe, 16, water outlet flow regulating valve, 17, water outlet flow meter, 18, water temperature sensor in the box, 19, air inlet collection pipe, 100, liquid level line, 101, air outlet, 102, water inlet, 103, water outlet, C-1, air filter, C-2, flow and temperature sensor, C-3, air compressor, C-4, first temperature sensor, C-5, fuel cell air inlet temperature and humidity adjusting device, C-6, bypass valve, C-7, pressure sensor, C-8, air inlet throttle, C-9, air back pressure valve, C-10, water storage chamber, C-11, air exhaust pipeline, W-1, water pump, W-2, second temperature sensor, A-1, fuel cell. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0037] It should be understood that the terms "length", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second", "third", "fourth", "fifth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second", "third", "fourth", "fifth" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0039] Please refer to Figures 1-3 , now a fuel cell inlet air temperature and humidity adjusting device provided by the embodiments of the present application will be described.

[0040] In an embodiment of the present application, the fuel cell inlet air temperature and humidity adjusting device provided by the embodiments of the present application comprises a tank 1 for storing liquid and at least two inlet air pipes, wherein the outlet end of each inlet air pipe extends into the tank 1, and the outlet end of at least two inlet air pipes is different from the distance to the liquid surface in the tank 1, that is, the length of at least two inlet air pipes extending into the tank 1 is different; the inlet end of each inlet air pipe is provided with an inlet air flow adjusting valve; the tank 1 is provided with an air outlet 101, a water inlet 102 and a water outlet 103, the air outlet 101 is higher than the liquid surface in the tank 1, and the water outlet 103 is lower than the liquid surface in the tank 1.

[0041] As shown in Figures 1-3 , the tank 1 of the embodiments of the present application is provided with three inlet air pipes in total: a first inlet air pipe 2, a second inlet air pipe 3 and a third inlet air pipe 4; the inlet end of the first inlet air pipe 2 is provided with a first inlet air flow adjusting valve 5, the inlet end of the second inlet air pipe 3 is provided with a second inlet air flow adjusting valve 6, and the inlet end of the third inlet air pipe 4 is provided with a third inlet air flow adjusting valve 7; the bottom of the tank 1 is flush. The height of the outlet end of the first inlet air pipe 2 from the bottom of the tank 1 is H1, the height of the outlet end of the second inlet air pipe 3 from the bottom of the tank 1 is H2, and the height of the outlet end of the third inlet air pipe 4 from the bottom of the tank 1 is H3, H1>H2>H3. That is, the distance between the outlet end of the first inlet air pipe 2 and the liquid surface (i.e. the liquid level line 100) < the distance between the outlet end of the second inlet air pipe 3 and the liquid surface (i.e. the liquid level line 100) < the distance between the outlet end of the third inlet air pipe 4 and the liquid surface (i.e. the liquid level line 100). In actual application, the liquid level height of water can be detected by setting a liquid level sensor in the tank 1 for monitoring. Of course, in other embodiments, the bottom of the tank 1 can also be flush.

[0042] To clearly show the arrangement form of the three inlet air pipes in the tank 1, Figure 2 , the cover plate of the tank 1 is not drawn.

[0043] In the embodiments of the present application, because the outlet end of the first inlet air pipe 2, the second inlet air pipe 3 and the third inlet air pipe 4 (i.e.Figure 2 , Figure 3 The height of the lower end of each tank from the bottom of the tank 1 varies, and the water level inside the tank 1 reaches 100 mm above the liquid level line. Figure 3 When the first air inlet pipe 2, the second air inlet pipe 3, and the third air inlet pipe 4 are immersed in the liquid at different heights, the contact time between the air coming out of each air inlet pipe 2, the second air inlet pipe 3, and the third air inlet pipe 4 and the water in the chamber 1 is different. This results in different degrees of humidification of the gas coming out of each different air inlet pipe in the chamber 1. Thus, by adjusting the amount of air entering each different air inlet pipe, the humidity of the air coming out of the outlet 101 can be adjusted.

[0044] In this embodiment, the height H1 of the outlet end of the first air inlet pipe 2 from the bottom of the box 1 is the largest, so the contact time between the gas entering from the first air inlet pipe 2 and the water in the box 1 is the shortest. The relative humidity of the gas exiting through the first air inlet pipe 2 is denoted as V1. The height H3 of the outlet end of the third air inlet pipe 4 from the bottom of the box 1 is the smallest, so the contact time between the gas entering from the third air inlet pipe 4 and the water in the box 1 is the longest. The relative humidity of the gas exiting through the third air inlet pipe 4 is denoted as V3. Similarly, the relative humidity of the gas exiting through the second air inlet pipe 3 is denoted as V2. Therefore, V3>V2>V1.

[0045] In this embodiment, height H3 is set to a height where 1 / 3 of the rated flow gas passing through the third inlet pipe 4 can be humidified to a relative humidity of V3, where V3 > 85%; height H2 is set to a height where 1 / 3 of the rated flow gas passing through the second inlet pipe 3 can be humidified to a relative humidity of V2, where 50% ≤ V2 ≤ 70%; height H1 is set to a height where 1 / 3 of the rated flow gas passing through the first inlet pipe 2 can be humidified to a relative humidity of V1, where 0% ≤ V1 ≤ 30%. Of course, in other embodiments, other humidity gradients can be set to adjust the position and number of inlet pipes to ensure the humidification and heat exchange performance of the fuel cell inlet temperature and humidity regulating device disclosed in this embodiment meets the real-time temperature and humidity requirements of the inlet air for different types of fuel cells A-1 under different operating conditions, ensuring stable and reliable operation of fuel cell A-1, avoiding and reducing adverse effects on fuel cell A-1 or its operating conditions caused by air not meeting current operating conditions, thereby ensuring the normal and stable operation of fuel cell A-1 and extending its service life.

[0046] In this embodiment of the application, the air intake ends of the first air intake pipe 2, the second air intake pipe 3 and the third air intake pipe 4 converge at the air inlet manifold 19. That is, after the air enters from the air inlet manifold 19, it is divided into three branch pipes: the first air intake pipe 2, the second air intake pipe 3 and the third air intake pipe 4, and then enters the housing 1 through the three branch pipes respectively.

[0047] The air from the three air inlet pipes exchanges heat with the water in the tank 1 and is humidified, so that the temperature of the air from the air outlet 101 can be adjusted by adjusting the temperature of the water in the tank 1. That is, the temperature of the air from the air outlet 101 can be adjusted by adjusting the temperature of the water in the tank 1 from the water inlet 102. For example, the water generated by the fuel cell A-1 (which itself carries a certain temperature) is delivered to the tank 1 to adjust the temperature of the water in the tank 1, such as increasing the flow rate or increasing the flow rate, input period (because the water generated by the fuel cell A-1 will lose heat over time, so the time, flow rate and flow rate of the water discharged into the tank 1 can be adjusted to adjust the temperature of the water in the tank 1) and the like.

[0048] In other embodiments, a heater or heat exchanger can also be provided in the tank 1 to heat or exchange heat with the water in the tank 1 to adjust the temperature of the water in the tank 1 to a suitable temperature, so that the application can meet the low temperature environment (such as -30℃ and below) to warm the water, so as to realize the temperature rise of the air flowing through the water, so as to meet the air inlet temperature requirement of the fuel cell A-1, protect the fuel cell A-1, and prolong its service life. Of course, a heater and a heat exchanger can be provided in the tank 1 to ensure normal use in extreme environments. In actual application, the heater can be an electric heater or an electromagnetic heater. The heat exchange pipe of the heat exchanger can penetrate the tank 1 and extend out to communicate with a heat source. The heat source flowing through the heat exchange pipe built in the tank 1 can realize heat exchange with the water and / or air, thereby realizing the temperature rise of the air to meet the air inlet temperature requirement.

[0049] The outlet end of each air inlet pipe of the embodiment of the application is composed of a plurality of mutually independent sub-outlet holes, and each sub-outlet hole communicates with the inlet end of the air inlet pipe. In this way, the outlet air is more dispersed, the contact area between the gas and the liquid is increased, and the humidification and heat exchange effect is more excellent. Further, the inner diameter D of the sub-outlet hole can be controlled in the range of 1 mm≤D≤40 mm to ensure the humidification and heat exchange effect. Specifically, the air inlet pipe includes a cylinder body and an outlet plate, the outlet plate is provided with a plurality of outlet holes, and the outlet plate is connected with the cylinder body. In actual application, the structure of the outlet plate can be a flat plate structure or a frame structure, and at least one surface of the outlet plate is provided with a plurality of outlet holes. The outlet plate and the cylinder body can be connected by welding, one-piece forming, screwing or clamping.

[0050] The fuel cell air inlet temperature and humidity adjusting device of the embodiment of the present application can actively adjust the temperature and humidity of the air entering the fuel cell A-1 to meet the requirements of the fuel cell A-1 for the entering air under different working conditions.

[0051] The air outlet 101 of the embodiment of the present application is connected with an air outlet pipe 8, and the air outlet pipe 8 is provided with an air outlet gas temperature sensor and an air outlet gas humidity sensor. The embodiment of the present application is provided with a temperature and humidity integrated sensor 9 on the air outlet pipe 8 to simultaneously detect the air outlet temperature and the air outlet humidity. Further, the air outlet pipe 8 of the embodiment of the present application is provided with an air flow meter 10 to detect the air outlet flow.

[0052] The water inlet 102 of the embodiment of the present application is connected with a water inlet pipe 11, and the water inlet pipe 11 is provided with a water inlet temperature sensor 12 to detect the water inlet temperature. Further, the water inlet pipe 11 of the embodiment of the present application is provided with a water inlet flow regulating valve 13 to regulate the water inlet flow. Further, the water inlet pipe 11 of the embodiment of the present application is provided with a water inlet flow meter 14 to detect the water inlet flow.

[0053] The water outlet 103 of the embodiment of the present application is connected with a water outlet pipe 15, and the water outlet pipe 15 is provided with a water outlet flow regulating valve 16 to regulate the water outlet flow. Further, the water outlet pipe 15 of the embodiment of the present application is provided with a water outlet flow meter 17 to detect the water outlet flow.

[0054] The embodiment of the present application is provided with a water-in-tank temperature sensor 18 in the tank 1 to detect the temperature of the water in the tank 1, and multiple water-in-tank temperature sensors 18 can be arranged at different positions in the tank 1 to detect the average temperature of the water in the tank 1.

[0055] The fuel cell air inlet temperature and humidity adjusting device of the embodiment of the present application is used to adjust the air outlet temperature, and the following steps can be performed:

[0056] The target outlet gas temperature at the outlet 101 under a certain working condition during the operation of the fuel cell A-1 is Tm, the inlet gas temperature at the air inlet collecting pipe 19 is measured as TI, and TQ = Tm - TI. If TQ > 0, it indicates that the inlet gas temperature is lower than the target value, and the air needs to be heated, the temperature of the water entering the tank 1 is adjusted, so that the temperature of the water entering the tank 1 (detected by the inlet water temperature sensor 12) > Tm; then, the average temperature Tc of the water in the tank 1 is adjusted by adjusting the flow of the water entering the tank 1 (adjusted by the inlet water flow regulating valve 13 and detected by the inlet water flow meter 14), so as to achieve the purpose of increasing the outlet gas temperature. By adjusting the opening of the outlet water flow regulating valve 16, the liquid level height of the water in the tank 1 can be adjusted.

[0057] Similarly, if TQ < 0, it indicates that the inlet gas temperature is higher than the target value, and the air needs to be cooled, the temperature of the water entering the tank 1 is adjusted, so that the temperature of the water entering the tank 1 < Tm; then, the average temperature Tc of the water in the tank 1 is adjusted by adjusting the flow of the water entering the tank 1, so as to achieve the purpose of reducing the outlet gas temperature.

[0058] The fuel cell inlet temperature and humidity adjusting device of the embodiment of the present application is used to adjust the outlet gas humidity, which can be performed according to the following steps:

[0059] The target outlet gas humidity of the air under a certain working condition during the operation of the fuel cell A-1 is Hm, the outlet gas humidity at the outlet 101 is measured as Hu by the temperature and humidity integrated sensor 9, and HX = Hm - Hu. If HX > 5%, it indicates that the outlet gas humidity is too low, and the opening of the first inlet gas flow regulating valve 5 is reduced, and the openings of the second inlet gas flow regulating valve 6 and the third inlet gas flow regulating valve 7 are increased, so as to increase the outlet gas humidity; if HX < -5%, it indicates that the outlet gas humidity is too high, and the opening of the first inlet gas flow regulating valve 5 is increased, and the openings of the second inlet gas flow regulating valve 6 and the third inlet gas flow regulating valve 7 are reduced, so as to reduce the outlet gas humidity.

[0060] In a second aspect, the embodiment of the present application also provides a fuel cell inlet temperature and humidity adjusting system, which has the structure as shown in Figure 4 The fuel cell inlet temperature and humidity adjusting system includes a fuel cell A-1 and an air system, the air system includes an air compressor C-3 and the fuel cell inlet temperature and humidity adjusting device C-5 of the embodiment of the present application, the exhaust outlet of the air compressor C-3 is connected in communication with the inlet pipe (the air inlet collecting pipe 19), and the outlet 101 is connected in communication with the air inlet of the fuel cell A-1; the drain pipe of the fuel cell A-1 is connected in communication with the water inlet 102.

[0061] The outlet 103 (outlet pipe 15) of the fuel cell inlet temperature and humidity regulating device C-5 in this embodiment can be connected to the inlet end of the drain pipe of fuel cell A-1, or it can be connected to the external environment. In practical applications, the outlet (outlet pipe 15) forms a circulation with the drain pipe, the inlet 102 (inlet pipe 11), and the inside of the tank 1 to ensure the stable maintenance of the water temperature inside the tank 1 under any operating conditions. At the same time, a water storage chamber C-10 can be set in the drain pipe to ensure the supply water temperature and supply volume, and excess water can be discharged through the water storage chamber C-10 or discharged to the external environment through the tank 1. In other embodiments, when the water produced by fuel cell A-1 meets the water temperature and water volume regulation of the tank 1, and there is no need to recycle the water discharged from the tank 1, the excess water in the tank 1 can be directly discharged to the external environment.

[0062] In practical applications, the operating temperature Tfc of fuel cell A-1 is generally 60~90℃; the humidity Hp for normal operation of fuel cell A-1 is generally 40~80%; the pressure Pm for normal operation of fuel cell A-1 is generally 50kPa~150kPa (gauge pressure); and the outlet temperature TCP of air compressor C-3 is 0.5℃.

[0063] In this embodiment of the fuel cell inlet temperature and humidity control system, air enters the air filter C-1 for filtration. The airflow into the fuel cell A-1 is monitored by flow and temperature sensors C-2. The air is then pressurized by the air compressor C-3, increasing its temperature, which is measured by the first temperature sensor C-4. The air then flows through the fuel cell inlet temperature and humidity control device C-5 for temperature and humidity regulation. After pressure measurement by the pressure sensor C-7 and passing through the air intake throttle valve C-8, the air enters the fuel cell A-1. Inside the fuel cell A-1, the air undergoes an electrochemical reaction with hydrogen, producing electricity, water, and heat. Unreacted air is discharged to the atmosphere through the air back pressure valve C-9, the water storage chamber C-10, and the air exhaust pipe C-11. The water carrying heat is collected in the water storage chamber C-10. Normally, the bypass valve C-6 is closed.

[0064] In this embodiment of the fuel cell inlet temperature and humidity control system, at low power operating point, the air flow and pressure required by fuel cell A-1 are relatively low. The target speed of air compressor C-3 is Sc, which may cause the outlet air temperature of air compressor C-3 to be lower than the normal operating temperature of fuel cell A-1, i.e., Tcp < Tfc. In this case, it is necessary to increase the speed Sc of air compressor C-3 to make Tcp > Tfc. Simultaneously, it is necessary to open the bypass valve C-6 to a certain angle and open the air intake throttle valve C-8. By adjusting the opening of bypass valve C-6 and air back pressure valve C-9, the air flow and pressure entering fuel cell A-1 can be adjusted. Of course, in other embodiments, to ensure the air temperature, the water inside the housing 1 can be heated using a heater and heat exchanger, thus raising the air temperature. This reduces the operating power of air compressor C-3 while ensuring the air supply. In this case, bypass valve C-6 can be opened or closed according to actual needs. This is more energy-efficient than relying solely on air compressor C-3 to ensure the air inlet temperature.

[0065] In this embodiment of the fuel cell inlet temperature and humidity control system, at high power operating point, the target speed of air compressor C-3 is Sc, and the outlet air temperature of air compressor C-3 is higher than the normal operating temperature of fuel cell A-1, i.e., Tcp > Tfc. High-temperature and low-humidity air entering the fuel cell inlet temperature and humidity control device C-5 of this embodiment can be actively cooled and humidified. Water flows from the water storage chamber C-10 into the water inlet 102 of device C-5 via water pump W-1. The flow rate of water entering the housing 1 is adjusted by regulating the opening of the inlet flow regulating valve 13, thereby regulating the air temperature inside the housing 1. Water flowing out from the outlet 103 of device C-5 is recirculated back into the water storage chamber C-10, preventing water waste and ensuring full utilization of water.

[0066] The water in the water storage chamber C-10 generally comes from the water produced by the fuel cell A-1. The water is cooled down by pressure reduction, flow in the pipeline, and natural cooling in the water storage chamber C-10. Therefore, the water temperature TW measured by the second temperature sensor W-2 is less than Tfc.

[0067] The water in this embodiment comes from the water produced by fuel cell A-1 (which carries a certain temperature). Depending on the needs, water at a suitable temperature can be introduced into the tank 1 to cool (e.g., in summer or tropical regions) and heat (e.g., in winter or cold regions) the air flowing through it, thus meeting the temperature and humidity requirements for air entering the stack, while saving energy and energy consumption.

[0068] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fuel cell air intake temperature and humidity adjusting device characterized by comprising: The device comprises a tank for storing liquid and at least two air inlet pipes; The air outlet end of each air inlet pipe extends into the tank, and the air outlet ends of at least two air inlet pipes are at different distances from the liquid level; the air inlet end of each air inlet pipe is provided with an air inlet flow regulating valve; The tank is provided with an air outlet, a water inlet and a water outlet; the air outlet is higher than the liquid level, and the water outlet is lower than the liquid level; The bottom of the tank is flush, and the at least two air inlet pipes comprise a first air inlet pipe, a second air inlet pipe and a third air inlet pipe; the air inlet end of the first air inlet pipe is provided with a first air inlet flow regulating valve, the air inlet end of the second air inlet pipe is provided with a second air inlet flow regulating valve, and the air inlet end of the third air inlet pipe is provided with a third air inlet flow regulating valve; the height of the air outlet end of the first air inlet pipe from the bottom of the tank is H1, the height of the air outlet end of the second air inlet pipe from the bottom of the tank is H2, and the height of the air outlet end of the third air inlet pipe from the bottom of the tank is H3; wherein H1>H2>H3; the air outlet is connected with an air outlet pipe, and the air outlet pipe is provided with an air outlet gas temperature sensor and an air outlet gas humidity sensor; and / or, The tank is internally provided with a heater and / or a heat exchanger; and / or, The tank is internally provided with a liquid level sensor.

2. The device according to claim 1, wherein: The air outlet pipe is provided with an air flow meter; and / or, The device further comprises a gas inlet manifold which is in communication with the air inlet end of each air inlet pipe.

3. The fuel cell gas temperature and humidity adjusting device according to any one of claims 1 to 2, wherein The water inlet is connected with a water inlet pipe, and the water inlet pipe is provided with a water inlet temperature sensor and / or a water inlet flow regulating valve.

4. The fuel cell gas inlet temperature and humidity adjusting device according to claim 3, wherein The water inlet pipe is provided with a water inlet flow meter; and / or, The tank is internally provided with a tank water temperature sensor; and / or, The water outlet is connected with a water outlet pipe, and the water outlet pipe is provided with a water outlet flow regulating valve and / or a water outlet flow meter.

5. The fuel cell gas temperature and humidity adjusting device according to any one of claims 1 to 2 or 4, wherein The air outlet end of each air inlet pipe is composed of a plurality of mutually independent sub-air outlet holes, and each sub-air outlet hole is in communication with the air inlet end of the air inlet pipe.

6. The fuel cell gas inlet temperature and humidity adjusting apparatus according to claim 5, wherein The inner diameter of the sub-air outlet hole is 1mm≤D≤40mm.

7. A fuel cell air intake temperature and humidity conditioning system, characterized by, The device comprises a fuel cell and an air system, the air system comprises an air compressor and the fuel cell air temperature and humidity regulating device according to any one of claims 1-6, the air outlet of the air compressor is in communication with the air inlet pipe, the air outlet is in communication with the air inlet of the fuel cell; the water outlet pipeline of the fuel cell is in communication with the water inlet; The device further comprises a water storage chamber, a back pressure valve and a bypass valve; The water outlet pipeline of the fuel cell is in communication with the water inlet through the water storage chamber; The water outlet pipeline of the fuel cell is in communication with the water storage chamber through the back pressure valve; The air outlet is also in communication with the water storage chamber through the bypass valve.

8. A fuel cell inlet air temperature and humidity conditioning system as in claim 7, wherein: The water outlet of the fuel cell air temperature and humidity regulating device is in communication with the water inlet end of the water outlet pipeline; and / or, The water outlet of the fuel cell air temperature and humidity regulating device is in communication with the external environment.

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