Control valve, humidifier, and fuel cell system

Abstract

A control valve, a humidifier, and a fuel cell system. The control valve (1000) comprises: a valve seat (100) being internally provided with a core cavity (110), and a first flow channel (120), a second flow channel (130) and a third flow channel (140) which are separately communicated with the core cavity (110), the valve seat (100) being provided with a first valve seat opening (121) communicated with the first flow channel (120), a second valve seat opening (131) communicated with the second flow channel (130), and a third valve seat opening (141) communicated with the third flow channel (140), and the first valve seat opening (121) and the second valve seat opening (131) being located at the same side of the valve seat (100). A valve core (200) is rotatably provided in the core cavity (110), and the valve core (200) is provided with a first valve opening (211) and a second valve opening (223) which are communicated with each other. The valve core (200) rotates relative to the valve seat (100) so as to enable the first valve opening (211) to correspondingly communicate with the first flow channel (120) or the second flow channel (130), the second valve opening (223) being used for communicating with the third flow channel (140). Two flow channels that can be controlled to be opened or closed are formed in the valve seat (100), and the first valve seat opening (121) and the second valve seat opening (131) have different communication positions with the humidifier (2000), thus lengths of paths that a cathode reaction gas flows through are different, and different transfer efficiencies of the cathode reaction gas with a humid and hot tail gas are achieved, thereby regulating the humidity of the cathode reaction gas.

Description

A regulating valve, a humidifier and a fuel cell system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202310922348.5 filed on July 26, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of fuel cell technology, and in particular relates to a regulating valve, a humidifier, and a fuel cell system. Background Art

[0004] In a fuel cell, a humidifier is used to increase the humidity of the cathode reaction gas, so that the humidity of the cathode reaction gas is maintained within an appropriate range to ensure the smooth progress of the electrochemical reaction. In related technologies, the humidifier adopts a membrane humidification method, using hot and humid exhaust gas to humidify the cathode reaction gas, and performs heat and mass transfer in the humidifier to increase the temperature and humidity of the cathode reaction gas. However, this type of humidifier cannot adjust the humidity by itself, and requires additional pipelines and valves to adjust the humidity of the cathode reaction gas after humidification by adjusting the amount of hot and humid exhaust gas and / or cathode reaction gas. As a result, the humidification equipment has the defects of complex pipelines, many leakage points, large size, and high cost.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field.

[0006] Summary of the Invention

[0007] The present application aims to at least partially address the technical issues of humidification equipment, such as complex piping, numerous leaks, large size, and high cost. To this end, the present application provides a regulating valve, a humidifier, and a fuel cell system.

[0008] The technical solution of the present application provides a regulating valve, which comprises: a valve seat, a core cavity and a first flow channel, a second flow channel and a third flow channel respectively connected to the core cavity, and the valve seat is provided with a first valve seat opening connected to the first flow channel, a second valve seat opening connected to the second flow channel and a third valve seat opening connected to the third flow channel, the first valve seat opening and the second valve seat opening are located on the same side of the valve seat; and a valve core, the valve core is rotatably arranged in the core cavity, the valve core is provided with a first valve opening and a second valve opening connected to each other, and the rotation of the valve core relative to the valve seat can make the first valve opening connected to the first flow channel or the second flow channel respectively, and the second valve opening is used to connect to the third flow channel.

[0009] In some optimized technical solutions, the valve seat is provided with a fourth valve seat opening connected to the core cavity, and the fourth valve seat opening, the first valve seat opening and the second valve seat opening are located on the same side of the valve seat; the valve core is provided with a fourth valve opening connected to the second valve port, and the valve core can rotate relative to the valve seat to enable the fourth valve port to be connected correspondingly to the fourth valve seat opening.

[0010] In some optimized technical solutions, the valve core includes a bottom core body with a hollow cylindrical structure and a top core body with a hollow cylindrical structure; wherein, the side wall of the bottom core body is provided with the first valve port, the bottom surface of the bottom core body is provided with the fourth valve port, and the side wall of the top core body is provided with the second valve port.

[0011] In some optimized technical solutions, the distribution range of the first valve ports on the side wall of the bottom core is less than or equal to 90°.

[0012] In some optimized technical solutions, the fourth valve seat port is an arc-shaped opening or a fan-shaped opening with an angle of less than or equal to 90°, and the fourth valve port is an arc-shaped opening or a fan-shaped opening with an angle of less than or equal to 90°; or, the fourth valve seat port is two arc-shaped openings or fan-shaped openings that are oppositely arranged and are less than or equal to 90°, and the fourth valve port is two arc-shaped openings or fan-shaped openings that are oppositely arranged and are less than or equal to 90°; and when the first valve port is not connected to the first flow channel or the second flow channel, the fourth valve port is connected to the fourth valve seat port.

[0013] In some optimized technical solutions, the valve core further includes a transmission shaft arranged on the top core body, and the transmission shaft passes through the core cavity and is located outside the valve seat.

[0014] The technical solution of the present application also provides a humidifier, which includes: a shell, a humidification chamber is provided in the shell, and a cathode reaction gas inlet and a cathode reaction gas outlet connected to the humidification chamber are provided on the shell; a membrane tube, the membrane tube is arranged in the humidification chamber, and the shell is provided with a hot and humid exhaust gas inlet and a hot and humid exhaust gas outlet connected to the membrane tube; and the above-mentioned regulating valve, the regulating valve is arranged on the shell, and the first valve seat port and the second valve seat port of the regulating valve are connected to the humidification chamber through the cathode reaction gas inlet, or the first valve seat port and the second valve seat port of the regulating valve are connected to the humidification chamber through the cathode reaction gas outlet.

[0015] In some optimized technical solutions, the valve seat is provided with a fourth valve seat opening connected to the valve core cavity, and the fourth valve seat opening, the first valve seat opening and the second valve seat opening are located on the same side of the valve seat; the valve core is provided with a fourth valve opening connected to the second valve opening, and the valve core rotates relative to the valve seat so that the first valve port is connected to the first flow channel or the second flow channel respectively, or the fourth valve port is connected to the fourth valve seat opening; the fourth valve seat opening is connected to the humidification chamber.

[0016] In some optimized technical solutions, the regulating valve is arranged on a side of the shell opposite to the cathode reaction gas inlet.

[0017] In some optimized technical solutions, any one of the first valve seat opening, the second valve seat opening, and the fourth valve seat opening is arranged opposite to the cathode reaction gas inlet.

[0018] The technical solution of the present application also provides a fuel cell system, which includes the above-mentioned humidifier.

[0019] The technical solution of this application has at least the following beneficial effects:

[0020] The regulating valve is provided with a first valve seat opening and a second valve seat opening. By rotating the valve core relative to the valve seat, the first valve seat opening is connected to the first flow channel or the second valve seat opening is connected to the second flow channel, thereby forming two adjustable flow channels in the valve seat. After the regulating valve is set in the humidifier, the first valve seat opening and the second valve seat opening are connected to the humidifier at different positions. Therefore, the flow path lengths of the cathode reaction gas passing through the humidifier and entering the regulating valve are different. By adjusting the flow path length of the cathode reaction gas, the transmission efficiency of the cathode reaction gas with the humid and hot exhaust gas is adjusted, thereby achieving the adjustment of the humidity of the cathode reaction gas. In other words, by setting a regulating valve in the humidifier, the humidity of the cathode reaction gas can be self-regulated, which can reduce the control difficulty and pressure fluctuation of the humidifier. It can also avoid the setting of relatively large bypass pipes and valves, thereby reducing the leakage points and cost of the humidifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] FIG1 shows a bottom view of a valve seat in a regulating valve according to an embodiment of the present application;

[0023] FIG2 shows a top view of the valve seat in the regulating valve in FIG1 ;

[0024] FIG3 shows a schematic cross-sectional structure diagram of the valve seat in the regulating valve in FIG1 ;

[0025] FIG4 is a schematic diagram showing the three-dimensional structure of the valve core in the regulating valve according to an embodiment of the present application;

[0026] FIG5 shows a schematic cross-sectional view of the valve core in FIG4 ;

[0027] FIG6 shows a bottom view of the valve core in FIG4 ;

[0028] FIG7 shows a schematic diagram of a regulating state of a regulating valve in an embodiment of the present application;

[0029] FIG8 shows a bottom view of the regulating valve in FIG7 ;

[0030] FIG9 is a schematic diagram showing another regulating state of the regulating valve in an embodiment of the present application;

[0031] FIG10 shows a bottom view of the regulating valve in FIG9 ;

[0032] FIG11 is a schematic diagram showing another adjustment state of the regulating valve in an embodiment of the present application;

[0033] FIG12 shows a bottom view of the regulating valve in FIG11 ;

[0034] FIG13 is a cross-sectional schematic diagram showing the working principle of the membrane tube of the humidifier in FIG12 ;

[0035] FIG14 shows a schematic diagram of a first humidity adjustment path of the humidifier in FIG12 ;

[0036] FIG15 shows a schematic diagram of a second humidity adjustment path of the humidifier in FIG12 ;

[0037] FIG16 shows a schematic diagram of a third humidity adjustment path of the humidifier in FIG12 ;

[0038] FIG17 shows a schematic diagram of the path structure of the cathode reaction gas in the fuel cell system in an embodiment of the present application.

[0039] Description of reference numerals:

[0040] 1000, regulating valve; 100, valve seat; 110, core cavity; 111, fourth valve seat opening; 120, first flow channel; 121, first valve seat opening; 130, second flow channel; 131, second valve seat opening; 140, third flow channel; 141, third valve seat opening; 151, valve seat bottom wall; 152, valve seat side wall; 153, valve seat top wall; 154, valve seat partition; 200, valve core; 210, bottom core body; 21 1. First valve port; 212. Fourth valve port; 213. Bottom surface of bottom core; 214. Side wall of bottom core; 215. Bottom flow channel; 220. Top core; 221. Top surface of top core; 222. Side wall of top core; 223. Second valve port; 230. Drive shaft; 300. Motor; 2000. Humidifier; 2100. Housing; 2110. Humidification chamber; 2120. Cathode reaction gas inlet 2130, potting baffle; 2140, hot and humid exhaust gas inlet flow channel; 2150, hot and humid exhaust gas outlet flow channel; 2160, cathode reaction gas outlet; 2161, first cathode reaction gas outlet; 2162, second cathode reaction gas outlet; 2163, fourth cathode reaction gas outlet; 2200, membrane tube; 2210, hot and humid exhaust gas inlet; 2220, hot and humid exhaust gas outlet; 3100, air filter; 32 00, air flow meter; 3300, air compressor; 3400, intercooler; 3510, stack inlet humidity sensor; 3520, stack outlet humidity sensor; 3600, fuel cell; 3610, cathode; 3611, cathode reaction gas inlet; 3612, hot and humid exhaust gas outlet; 3620, anode; 3710, pressure relief valve; 3720, back pressure valve; 3800, mixing device; 3900, controller. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] In addition, this application may repeat reference numbers and / or reference letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials, but those of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0043] The present application is described below with reference to specific embodiments and with reference to the accompanying drawings:

[0044] As global environmental and energy issues become increasingly severe, the fuel cell 3600 vehicle is considered to be the most promising energy power device in the future due to its advantages such as being pollution-free, high energy conversion efficiency, and a wide range of raw material sources.

[0045] In the fuel cell 3600, the humidifier 2000 is used to increase the humidity of the cathode reaction gas so that the humidity of the cathode reaction gas is maintained within a suitable range to ensure the smooth progress of the electrochemical reaction. In the related art, the humidifier 2000 adopts a membrane humidification method, using hot and humid exhaust gas to humidify the cathode reaction gas, and performs heat and mass transfer in the humidifier 2000 to increase the temperature and humidity of the cathode reaction gas. However, this type of humidifier 2000 itself cannot adjust the humidity, and it is necessary to add pipelines and valves to adjust the humidity of the cathode reaction gas after humidification by adjusting the amount of hot and humid exhaust gas and / or cathode reaction gas. As a result, the humidification equipment has the defects of complex pipelines, many leakage points, large size, and high cost.

[0046] In the case where the humidity of the hot and humid exhaust gas is too high, one solution is to add a bypass pipe and a valve so that part of the hot and humid exhaust gas bypasses the humidifier 2000 through the bypass pipe and is discharged directly. The humidity of the cathode reaction gas after humidification is adjusted by controlling the flow rate of the hot and humid exhaust gas. This method of adjusting the humidity of the cathode reaction gas not only increases the cost of pipes and valves and increases the risk of leakage, but also leads to waste of heat from the hot and humid exhaust gas. Another solution is to add a bypass pipe and a valve to introduce fresh cathode reaction gas into the hot cathode reaction gas that is too humid after humidification, so that the humidity of the cathode reaction gas entering the fuel cell after mixing is reduced to an appropriate range, that is, by increasing the flow rate of the cathode reaction gas to adjust the humidity of the cathode reaction gas entering the fuel cell. This method of adjusting the cathode reaction gas not only increases the cost of pipes and valves, but also increases the risk of leakage. The above solutions all achieve the purpose of adjusting the humidity of the cathode reaction gas by adjusting the amount. There are disadvantages such as a large structure of the amount adjustment device, complex piping, high control difficulty, and large pressure fluctuations.

[0047] For example, a humidity control system for a fuel cell 3600 includes an air supply device, a membrane humidifier 2000, a humidity sensor, the fuel cell 3600, a first exhaust manifold, a first regulating valve 1000, and a second regulating valve 1000. The air outlet of the air supply device is connected to the air inlet of the fuel cell 3600 via the dry area of ​​the membrane humidifier 2000 and the humidity sensor. The air outlet of the fuel cell 3600 is connected to the first regulating valve 1000 via the first exhaust manifold and the wet area of ​​the membrane humidifier 2000, and is also connected to the second regulating valve 1000 via the first exhaust manifold. The humidity control system for the fuel cell 3600 is used to adjust the openings of the first regulating valve 1000 and the second regulating valve 1000 based on the monitoring results of the humidity sensor to maintain the humidity of the air entering the fuel cell 3600 within a specified range. This solution has the disadvantages of complex piping. A three-way joint needs to be added to the exhaust port of the fuel cell stack, which increases the number of corresponding pipelines, increases the leakage points in the air path, and is bulky. Simultaneously controlling two regulating valves 1000 increases the complexity of FCU (Fuel-cell Control Unit, fuel cell system controller 3900) control, and the opening or closing of the second regulating valve 1000 will cause pressure fluctuations at the cathode outlet, which is not conducive to the life of the fuel cell stack.

[0048] In response to the above-mentioned problems of the humidifier 2000 , the present application provides a regulating valve 1000 , as shown in FIG. 1 to FIG. 12 . In some embodiments, the regulating valve 1000 includes a valve seat 100 and a valve core 200 . In which, the valve seat 100 is provided with a core cavity 110 and a first flow channel 120, a second flow channel 130 and a third flow channel 140 respectively connected to the core cavity 110, and the valve seat 100 is provided with a first valve seat port 121 connected to the first flow channel 120, a second valve seat port 131 connected to the second flow channel 130 and a third valve seat port 141 connected to the third flow channel 140, and the first valve seat port 121 and the second valve seat port 131 are located on the same side of the valve seat 100; the valve core 200 is rotatably arranged in the core cavity 110, and the valve core 200 is provided with a first valve port 211 and a second valve port 223 that are connected to each other. The rotation of the valve core 200 relative to the valve seat 100 can make the first valve port 211 correspondingly connected to the first flow channel 120 or the second flow channel 130, and the second valve port 223 is used to connect with the third flow channel 140.

[0049] The regulating valve 1000 of the present application is provided with at least a first valve seat opening 121 and a second valve seat opening 131. By rotating the valve core 200 relative to the valve seat 100, the first valve seat opening 121 communicates with the first flow channel 120, or the second valve seat opening 131 communicates with the second flow channel 130, thereby forming two adjustable flow channels within the valve seat 100. As shown in Figures 14 to 16, after the regulating valve 1000 is installed in the humidifier 2000, the first valve seat opening 121 and the second valve seat opening 131 communicate with the humidifier 2000 at different locations. Therefore, the cathode reactant gas passes through the humidifier 2000 and enters the regulating valve 1000 through different flow paths. By adjusting the length of the cathode reactant gas flow path, the transmission efficiency of the cathode reactant gas to the hot and humid exhaust gas is adjusted, thereby adjusting the humidity of the cathode reactant gas. That is to say, by setting the regulating valve 1000 in the humidifier 2000, self-regulation of the humidity of the cathode reaction gas can be achieved, which can reduce the control difficulty and pressure fluctuation of the humidifier 2000, and can also avoid setting up relatively large bypass pipes and valves to reduce leakage points and costs of the humidifier 2000.

[0050] In the regulating valve 1000 of the present application, the structural design of the valve seat 100 and the valve core 200 enables the sealing cooperation between the valve core 200 and the valve seat 100. By controlling the rotation angle of the valve core 200 relative to the valve seat 100, the on-off of different flow channels of the regulating valve 1000 can be controlled to adjust the position of the cathode reaction gas inlet 2120 and / or the position of the cathode reaction gas outlet 2160 in the humidifier 2000, so that the distance between the cathode reaction gas inlet 2120 and the cathode reaction gas outlet 2160 in the debugger is different, so that the effective exchange length of the cathode reaction gas in the humidifier 2000 is different, thereby achieving the purpose of adjusting the water exchange efficiency on both sides of the membrane tube 2200, and finally realizing the self-regulating function of the cathode reaction gas humidity of the humidifier 2000.

[0051] In some embodiments, the valve core 200 is rotatably disposed in the core cavity 110. By rotating the valve core 200 relative to the valve seat 100, the first valve port 211 of the valve core 200 can be connected to the first flow channel 120 accordingly, and the second valve port 223 of the valve core 200 can be connected to the third flow channel 140. At this time, the flow path of the cathode reaction gas in the regulating valve 1000 is as shown in Figure 7, and the cathode reaction gas flows through the first flow channel 120, the valve core 200 and the third flow channel 140 in sequence.

[0052] In some embodiments, the valve core 200 is rotatably disposed in the core cavity 110. By rotating the valve core 200 relative to the valve seat 100, the first valve port 211 of the valve core 200 can be connected to the second flow channel 130 accordingly, and the second valve port 223 of the valve core 200 can be connected to the third flow channel 140. At this time, the flow path of the cathode reaction gas in the regulating valve 1000 is as shown in Figure 11, and the cathode reaction gas flows through the second flow channel 130, the valve core 200 and the third flow channel 140 in turn.

[0053] In some embodiments, regulating valve 1000 can be connected to cathode reactant gas inlet 2120 of humidifier 2000, so that humidifier 2000 has at least two cathode reactant gas inlets 2120 at different locations. This allows for different distances between cathode reactant gas inlets 2120 and cathode reactant gas outlet 2160 in humidifier 2000. Cathode reactant gas enters humidifier 2000 through cathode reactant gas inlets 2120 at different locations. The effective exchange length of cathode reactant gas along the length of membrane tube 2200 in humidifier 2000 varies, resulting in different water exchange efficiencies with both sides of membrane tube 2200, and thus different final humidity levels of the cathode reactant gas. In other words, the humidity of the cathode reactant gas can be adjusted by controlling the position of cathode reactant gas inlet 2120, i.e., by controlling the position of valve core 200 in regulating valve 1000, through which cathode reactant gas enters humidifier 2000.

[0054] In some embodiments, as shown in Figures 14 to 16 , a regulating valve 1000 can be connected to the cathode reactant gas outlet 2160 of the humidifier 2000, so that the humidifier 2000 has at least two cathode reactant gas outlets 2160 at different locations. This allows the distances between the cathode reactant gas outlets 2160 and the cathode reactant gas inlet 2120 at different locations in the humidifier 2000 to vary. As the cathode reactant gas exits the humidifier 2000 through the cathode reactant gas outlets 2160 at different locations, the effective exchange lengths of the cathode reactant gas along the length of the membrane tube 2200 in the humidifier 2000 vary, resulting in different water exchange efficiencies with the water on both sides of the membrane tube 2200, and thus different final humidity levels of the cathode reactant gas. In other words, the humidity of the cathode reactant gas can be adjusted by controlling the position of the cathode reactant gas outlet 2160 through which the cathode reactant gas exits the humidifier 2000, that is, by controlling the position of the valve core 200 in the regulating valve 1000.

[0055] In some embodiments, the humidifier 2000 may be provided with two regulating valves 1000, wherein one regulating valve 1000 is in communication with the cathode reactant gas inlet 2120 of the humidifier 2000, and the other regulating valve 1000 is in communication with the cathode reactant gas outlet 2160 of the humidifier 2000. This allows the humidifier 2000 to have at least two cathode reactant gas inlets 2120 at different locations and at least two cathode reactant gas outlets 2160 at different locations. This allows the distances between the cathode reactant gas inlets 2120 at different locations in the humidifier 2000 to be different. The cathode reactant gas enters the humidifier 2000 through the cathode reactant gas inlets 2120 at different locations and flows out of the humidifier 2000 through the cathode reactant gas outlets 2160 at different locations. The effective exchange lengths of the cathode reactant gas along the length of the membrane tube 2200 in the humidifier 2000 are different, resulting in different water exchange efficiencies with both sides of the membrane tube 2200, and thus different final humidity of the cathode reactant gas. That is, the purpose of adjusting the humidity of the cathode reaction gas can be achieved by controlling the position of the cathode reaction gas inlet 2120 where the cathode reaction gas enters the humidifier 2000 and the position of the cathode reaction gas outlet 2160 where the cathode reaction gas flows out of the humidifier 2000, that is, by controlling the position of the valve core 200 in the two regulating valves 1000.

[0056] In the above embodiment, the rotation angle of the valve core 200 in the regulating valve 1000 can be controlled according to the humidity of the cathode reaction gas detected by the humidity sensor in the fuel cell system, so as to change the position of the cathode reaction gas inlet 2120 and / or the position of the cathode reaction gas outlet 2160, so as to achieve the purpose of changing the effective exchange length of the cathode reaction gas in the length direction of the membrane tube 2200 in the humidifier 2000, thereby increasing or decreasing the humidity of the cathode reaction gas entering the fuel cell 3600.

[0057] In the above embodiment, the humidifier 2000 has a humidity self-regulating function by controlling the regulating valve 1000. The humidity regulation control is simple, and no pressure fluctuation is generated in the cathode reaction gas path, which is beneficial to improving the life and voltage stability of the fuel cell 3600. At the same time, the humidifier 2000 is compact in size, without redundant pipes and joints, and will not increase the leakage points in the cathode reaction gas path in the fuel cell system, thereby improving the operation stability of the fuel cell system.

[0058] As an optional embodiment, as shown in Figures 1 to 12, the valve seat 100 is provided with a fourth valve seat port 111 connected to the core cavity 110, and the fourth valve seat port 111, the first valve seat port 121 and the second valve seat port 131 are located on the same side of the valve seat 100; the valve core 200 is provided with a fourth valve port 212 connected to the second valve port 223, and the valve core 200 can rotate relative to the valve seat 100 to enable the fourth valve port 212 to be connected to the fourth valve seat port 111 accordingly.

[0059] In some embodiments, as shown in Figures 1 and 4, a fourth valve seat port 111 communicating with the core cavity 110 is provided on the valve seat 100, and the fourth valve seat port 111, the first valve seat port 121 and the second valve seat port 131 are located on the same side of the valve seat 100. When the regulating valve 1000 is set in the humidifier 2000, the fourth valve seat port 111, the first valve seat port 121 and the second valve seat port 131 can be respectively communicated with the humidification cavity 2110 of the humidifier 2000. At the same time, the valve core 200 is provided with a fourth valve port 212 connected to the second valve port 223. By rotating the valve core 200 relative to the valve seat 100, the fourth valve port 212 can be connected to the fourth valve seat port 111 accordingly. At this time, the cathode reaction gas can enter the interior of the valve core 200 through the fourth valve seat port 111 and the third valve seat port 141, and can enter the third flow channel 140 through the second valve port 223, and finally be discharged through the third valve seat port 141 connected to the third flow channel 140. In these embodiments, by opening a fourth valve seat opening 111 on the valve seat 100 and a fourth valve opening 212 on the valve core 200, the regulating valve 1000 can add a position for cathode reaction gas to enter the regulating valve 1000. Accordingly, when the regulating valve 1000 is set in the humidifier 2000, the humidifier 2000 can add a cathode reaction gas inlet 2120 position and / or a cathode reaction gas outlet 2160 position, so that the humidifier 2000 has more cathode reaction gas flow paths with different effective exchange lengths, thereby making the humidifier 2000 have a humidity regulation function with more types, more flexible adjustment and more precise adjustment.

[0060] In some embodiments, as shown in Figures 1 to 3, the valve seat 100 includes a valve seat bottom wall 151, a valve seat side wall 152, a valve seat top wall 153, and a valve seat partition 154. The valve seat 100 forms an internal cavity through the valve seat bottom wall 151, the valve seat side wall 152, and the valve seat top wall 153. A partition is provided in the internal cavity to separate the internal cavity into a core cavity 110, a first flow channel 120, a second flow channel 130, and a third flow channel 140. As shown in Figure 3, the partition can be used to divide the valve seat 100 into two parts, upper and lower. The first flow channel 120 and the second flow channel 130 are located in the lower part of the valve seat 100, and the third flow channel 140 is located in the upper part of the valve seat 100. The third flow channel 140 is separated from the first flow channel 120 and the second flow channel 130 by the partition. The lower portion of the core cavity 110 is located between the first flow channel 120 and the second flow channel 130 and is in communication with both. The upper portion of the core cavity 110 is located at the end of the first flow channel 120 and is in communication with the third flow channel 140. That is, as shown in FIG3 , horizontally, the first flow channel 120, the lower portion of the core cavity 110, and the second flow channel 130 are in communication with each other, and the upper portion of the core cavity 110 is in communication with the third flow channel 140. Vertically, the lower portion of the core cavity 110 is in communication with the upper portion of the core cavity 110, thereby allowing the valve core 200 to be disposed in the core cavity 110.

[0061] In some embodiments, as shown in Figures 1 to 3, a fourth valve seat opening 111 can be opened at the bottom wall of the valve seat 100 corresponding to the core cavity 110, and accordingly, a fourth valve opening 212 is opened on the valve core 200. By rotating the valve core 200 relative to the valve seat 100, the fourth valve opening 212 can be made to correspond to the fourth valve seat opening 111, so that the fourth valve seat opening 111 and the fourth valve opening 212 can be connected. Since the fourth valve opening 212 is connected to the second valve opening 223, the cathode reaction gas can enter the fourth valve opening 212 of the valve core 200 through the fourth valve seat opening 111 of the valve seat 100, and then enter the third flow channel 140 of the valve seat 100 through the second valve opening 223 of the valve core 200, and then can flow out of the third flow channel 140 through the third valve seat opening 141.

[0062] In some embodiments, as shown in FIG3 , the first flow channel 120 , the second flow channel 130 , and the third flow channel 140 may be cylindrical flow channels. As shown in FIG1 and FIG2 , the first valve seat opening 121 , the second valve seat opening 131 , and the third valve seat opening 141 may be circular openings, and the fourth valve seat opening 111 may be a symmetrically arranged fan-shaped opening.

[0063] In other embodiments, the first flow channel 120, the second flow channel 130, and the third flow channel 140 are rectangular flow channels or flow channel structures of other shapes. The first valve seat opening 121, the second valve seat opening 131, the third valve seat opening 141, and the fourth valve seat opening 111 can be openings of various shapes, such as rectangular openings, fan-shaped openings, trapezoidal openings, triangular openings, etc., as long as they can achieve communication between the first flow channel 120, the second flow channel 130, the third flow channel 140, and the core cavity 110 and the exterior of the valve seat 100. Detailed description is omitted here.

[0064] As an optional embodiment, as shown in Figures 4 to 6, the valve core 200 includes a bottom core 210 with a hollow cylindrical structure and a top core 220 with a hollow cylindrical structure; wherein, the side wall 214 of the bottom core is provided with a first valve port 211, the bottom surface 213 of the bottom core is provided with a fourth valve port 212, and the side wall 222 of the top core is provided with a second valve port 223.

[0065] In some embodiments, as shown in Figures 4 to 6, the valve core 200 as a whole can be a cylindrical structure with a hollow structure inside. As shown in Figure 5, the valve core 200 can be divided into two parts, that is, the valve core 200 is divided into a bottom core body 210 and a top core body 220. The hollow structure inside the bottom core body 210 forms a bottom flow channel 215, and the hollow structure inside the top core body 220 forms a top flow channel. The bottom flow channel 215 inside the bottom core body 210 and the top flow channel of the top core body 220 can be directly connected or connected through a structure such as a filter. When the valve core 200 is set in the core cavity 110 of the valve seat 100, the bottom core body 210 is located at the lower part of the core cavity 110, and the top core body 220 is located at the upper part of the core cavity 110.

[0066] As shown in Figures 4 and 5, the side wall 214 of the bottom core is provided with a first valve port 211. By rotating the valve core 200 relative to the valve seat 100, the first valve port 211 can be directed toward the first flow channel 120, thereby connecting the first valve port 211 with the first flow channel 120. At the same time, the side wall 214 of the bottom core blocks the second flow channel 130, disconnecting the valve core 200 from the second flow channel 130. The flow path of the cathode reaction gas in the regulating valve 1000 is the first flow channel 120, the valve core 200, and the second flow channel 130. 200 and the third flow channel 140; by rotating the valve core 200 180° relative to the valve seat 100, the first valve port 211 can be directed toward the second flow channel 130, so that the first valve port 211 is connected to the second flow channel 130, and at the same time, the side wall 214 of the bottom core blocks the first flow channel 120, so that the valve core 200 is disconnected from the first flow channel 120, and the flow path of the cathode reaction gas in the regulating valve 1000 is the second flow channel 130, the valve core 200 and the third flow channel 140.

[0067] As shown in Figures 4 and 6, a fourth valve port 212 is provided on the bottom surface 213 of the bottom core body. By rotating the valve core 200 relative to the valve seat 100, the first valve port 211 avoids the direction of the first flow channel 120 and the wind direction of the second flow channel 130. At the same time, the fourth valve port 212 corresponds to the fourth valve seat port 111. Even if the side wall 214 of the bottom core body blocks the first flow channel 120 and the second flow channel 130, the valve core 200 is disconnected from the first flow channel 120 and the second flow channel 130. The valve core 200 is connected to the outside of the valve seat 100 through the fourth valve port 212 and the fourth valve seat port 111, and the flow path of the cathode reaction gas in the regulating valve 1000 is the valve core 200 and the third flow channel 140.

[0068] As shown in Figures 4 and 5, a second valve port 223 is provided on the side wall 222 of the top core. In order to ensure that the second valve port 223 of the valve core 200 and the third flow channel 140 of the valve seat 100 are always connected regardless of the position to which the valve core 200 is rotated, a plurality of second valve ports 223 are provided on the side wall 222 of the top core. The plurality of second valve ports 223 are evenly distributed on the side wall 222 of the top core, so that the remaining part of the side wall 222 of the top core forms a grid structure, so that no matter what state the valve core 200 is rotated to, the side wall 222 of the top core has the second valve port 223 connected to the third flow channel 140.

[0069] In some embodiments, as shown in Figures 3 and 4, the core cavity 110 is a cylindrical structure, and the diameter of the upper part of the core cavity 110 is the same as that of the lower part of the core cavity 110. Accordingly, the valve core 200 is a cylindrical structure. When the valve core 200 is set in the core cavity 110, the valve core 200 can match the structure of the valve core 200, so that the valve core 200 and the core cavity 110 form a clearance-fit connection mode, so that the valve core 200 can rotate in the core cavity 110 and can also prevent the cathode reaction gas from leaking through the gap between the valve core 200 and the core cavity 110.

[0070] In some other embodiments, the upper part of the core cavity 110 and the lower part of the core cavity 110 can be cylindrical structures with different diameters respectively. Correspondingly, the top core body 220 and the bottom core body 210 in the valve core 200 are also cylindrical structures with different diameters. When the valve core 200 is set in the core cavity 110, the top core body 220 matches the upper structure of the core cavity 110, and the bottom core body 210 matches the lower structure of the core cavity 110.

[0071] In the regulating valve 1000 of the present application, the structures of the core cavity 110 and the valve core 200 can be adaptively adjusted according to design requirements, which will not be described in detail here.

[0072] As an optional embodiment, as shown in FIG. 4 and FIG. 5 , the first valve ports 211 are distributed over an angle of less than or equal to 90° on the side wall 214 of the bottom core.

[0073] In some embodiments, as shown in Figures 4 and 5, the distribution range of the first valve port 211 on the side wall 214 of the bottom core is less than or equal to 90°, which can ensure that when the valve core 200 rotates to the state where the first valve port 211 is connected to the fourth valve seat port 111, the first valve port 211 corresponds to the valve seat side wall 152, and the first valve port 211 can be blocked by the valve seat side wall 152 to prevent the first valve port 211 from being connected to the first flow channel 120 or the second flow channel 130.

[0074] In some embodiments, as shown in FIG4 , the first valve opening 211 formed on the sidewall 214 of the bottom core is circular. Optionally, the first valve opening 211 is circular, the first flow channel 120 and the second flow channel 130 are circular, and the diameter of the first valve opening 211 is the same as the diameter of the first flow channel 120 and the diameter of the second flow channel 130.

[0075] In some other embodiments, the first valve opening 211 formed on the side wall 214 of the bottom core may be rectangular. In addition, the first valve opening 211 may also be in other shapes, such as a triangle.

[0076] As an optional embodiment, as shown in Figure 1 and Figures 4 to 6, the fourth valve seat port 111 is an arc-shaped opening or a fan-shaped opening less than or equal to 90°, and the fourth valve port 212 is an arc-shaped opening or a fan-shaped opening less than or equal to 90°; or, the fourth valve seat port 111 is two arc-shaped openings or fan-shaped openings arranged opposite to each other and less than or equal to 90°, and the fourth valve port 212 is two arc-shaped openings or fan-shaped openings arranged opposite to each other and less than or equal to 90°; and when the first valve port 211 is not connected to the first flow channel 120 or the second flow channel 130, the fourth valve port 212 is connected to the fourth valve seat port 111.

[0077] In some embodiments, the fourth valve seat port 111 and the fourth valve port 212 are both arc-shaped openings or fan-shaped openings with an angle of less than or equal to 90°, or the fourth valve seat port 111 and the fourth valve port 212 are both two oppositely arranged arc-shaped openings or fan-shaped openings with an angle of less than or equal to 90°, so that the structures of the fourth valve seat port 111 and the fourth valve port 212 can be matched. During the rotation of the valve core 200 relative to the valve seat 100, the fourth valve port 212 can be rotated to a position corresponding to the fourth valve seat port 111, so that the fourth valve port 212 and the fourth valve seat port 111 can be overlapped, so that the bottom flow channel 215 of the valve core 200 is connected to the outside of the regulating valve 1000.

[0078] In some embodiments, a first valve port 211 is provided on the side wall 214 of the bottom core body, and a fan-shaped opening is provided on the bottom surface 213 of the bottom core body at a position corresponding to the first valve port 211 as a fourth valve port 212. Accordingly, a fan-shaped opening is provided on the bottom wall 151 of the valve seat at a position corresponding to the core cavity 110 and in a direction perpendicular to the first flow channel 120 / second flow channel 130 as a fourth valve seat port 111. When the valve core 200 is rotated to connect the first valve port 211 with the first flow channel 120, the fourth valve port 212 is staggered with the fourth valve seat port 111, the fourth valve port 212 is blocked by the valve seat bottom wall 151, and the second flow channel 130 is blocked by the side wall 214 of the bottom core body; the valve core 200 is rotated 90° to make the fourth valve port 212 correspondingly connected to the fourth valve seat port 111. At this time, the first valve port 211 is staggered with the first flow channel 120, the first flow channel 120 is blocked by the side wall 214 of the bottom core body, the first valve port 211 is staggered with the second flow channel 130, and the second flow channel 130 is blocked by the side wall 214 of the bottom core body; the valve core 200 is rotated 90° in the original direction of rotation to make the first valve port 2 11 is connected to the second flow channel 130. At this time, the fourth valve port 212 is staggered with the fourth valve seat port 111, the fourth valve port 212 is blocked by the valve seat bottom wall 151, and the first flow channel 120 is blocked by the side wall 214 of the bottom core body; the valve core 200 is further rotated 90° in the original rotation direction, so that the first valve port 211 can be staggered with the first flow channel 120, the first flow channel 120 is blocked by the side wall 214 of the bottom core body, the first valve port 211 is staggered with the second flow channel 130, the second flow channel 130 is blocked by the side wall 214 of the bottom core body, the fourth valve port 212 is staggered with the fourth valve seat port 111, and the fourth valve port 212 is blocked by the valve seat bottom wall 151. That is to say, the regulating valve 1000 is in a closed state.

[0079] In some other embodiments, a first valve port 211 is provided on the side wall 214 of the bottom core body, and a fan-shaped opening is provided on the bottom surface 213 of the bottom core body at a position staggered from the first valve port 211 as a fourth valve port 212. Accordingly, a fan-shaped opening is provided on the bottom wall 151 of the valve seat at a position corresponding to the core cavity 110 and in a direction corresponding to the first flow channel 120 / second flow channel 130 as a fourth valve seat port 111. When the valve core 200 is rotated to connect the first valve port 211 with the first flow channel 120, the fourth valve port 212 is staggered with the fourth valve seat port 111, the fourth valve port 212 is blocked by the valve seat bottom wall 151, and the second flow channel 130 is blocked by the side wall 214 of the bottom core body; the valve core 200 is rotated 90° to make the fourth valve port 212 correspondingly connected to the fourth valve seat port 111. At this time, the first valve port 211 is staggered with the first flow channel 120, the first flow channel 120 is blocked by the side wall 214 of the bottom core body, the first valve port 211 is staggered with the second flow channel 130, and the second flow channel 130 is blocked by the side wall 214 of the bottom core body; the valve core 200 is rotated 90° in the original direction of rotation to make the first valve port 2 11 is connected to the second flow channel 130. At this time, the fourth valve port 212 is staggered with the fourth valve seat port 111, the fourth valve port 212 is blocked by the valve seat bottom wall 151, and the first flow channel 120 is blocked by the side wall 214 of the bottom core body; the valve core 200 is further rotated 90° in the original rotation direction, so that the first valve port 211 can be staggered with the first flow channel 120, the first flow channel 120 is blocked by the side wall 214 of the bottom core body, the first valve port 211 is staggered with the second flow channel 130, the second flow channel 130 is blocked by the side wall 214 of the bottom core body, the fourth valve port 212 is staggered with the fourth valve seat port 111, and the fourth valve port 212 is blocked by the valve seat bottom wall 151. That is to say, the regulating valve 1000 is in a closed state.

[0080] In some embodiments, as shown in Figures 1 and 4 to 6, a first valve port 211 is provided on the side wall 214 of the bottom core body, and two relatively arranged fan-shaped openings are provided on the bottom surface 213 of the bottom core body at a position corresponding to the first valve port 211 as a fourth valve port 212. Accordingly, two relatively arranged fan-shaped openings are provided at a position corresponding to the core cavity 110 on the bottom wall 151 of the valve seat and in a direction perpendicular to the first flow channel 120 / the second flow channel 130 as a fourth valve seat port 111. As shown in Figures 7 and 8, when the valve core 200 is rotated to connect the first valve port 211 with the first flow channel 120, the fourth valve port 212 is staggered with the fourth valve seat port 111, the fourth valve port 212 is blocked by the valve seat bottom wall 151, and the second flow channel 130 is blocked by the side wall 214 of the bottom core body. The cathode reaction gas enters the first flow channel 120 from the first valve seat port 121, then enters the valve core 200 and the third flow channel 140, and finally exits the regulating valve 1000 through the third valve seat port 141; the valve core 200 is rotated 90°, as shown in Figures 9 and 10, so that the two fan-shaped openings serving as the fourth valve port 212 can be correspondingly connected to the two fan-shaped openings serving as the fourth valve seat port 111. At this time, the first valve port 211 is staggered with the first flow channel 120, the first flow channel 120 is blocked by the side wall 214 of the bottom core body, and the first The valve port 211 is staggered with the second flow channel 130, and the second flow channel 130 is blocked by the side wall 214 of the bottom core body. The cathode reaction gas enters the valve core 200 and the third flow channel 140 from the fourth valve seat port 111, and finally discharges the regulating valve 1000 through the third valve seat port 141; the valve core 200 is further rotated 90° in the original rotation direction, as shown in Figures 11 and 12, so that the first valve port 211 can be connected with the second flow channel 130. At this time, the fourth valve port 212 is staggered with the fourth valve seat port 111, and the fourth valve port 212 is blocked by the valve seat bottom wall 151, and the first flow channel 120 is blocked by the side wall 214 of the bottom core body. The cathode reaction gas enters the second flow channel 130 from the second valve seat port 131, then enters the valve core 200 and the third flow channel 140, and finally discharges the regulating valve 1000 through the third valve seat port 141.

[0081] In some embodiments, a first valve port 211 is provided on the side wall 214 of the bottom core body, and two relatively fan-shaped openings are provided on the bottom surface 213 of the bottom core body at a position staggered from the first valve port 211 as a fourth valve port 212. Accordingly, two relatively fan-shaped openings are provided on the bottom wall 151 of the valve seat at a position corresponding to the core cavity 110 and in a direction corresponding to the first flow channel 120 / the second flow channel 130 as a fourth valve seat port 111. When the valve core 200 is rotated to connect the first valve port 211 with the first flow channel 120, the fourth valve port 212 is staggered with the fourth valve seat port 111, the fourth valve port 212 is blocked by the valve seat bottom wall 151, and the second flow channel 130 is blocked by the side wall 214 of the bottom core body; rotating the valve core 200 90 degrees can make the two fan-shaped openings serving as the fourth valve port 212 correspondingly connected to the two fan-shaped openings serving as the fourth valve seat port 111. At this time, the first valve port 211 is staggered with the first flow channel 120, and the fourth valve port 212 is blocked by the valve seat bottom wall 151. The first flow channel 120 is blocked by the side wall 214 of the bottom core, the first valve port 211 is staggered with the second flow channel 130, and the second flow channel 130 is blocked by the side wall 214 of the bottom core; the valve core 200 is further rotated 90° in the original rotation direction to connect the first valve port 211 with the second flow channel 130. At this time, the fourth valve port 212 is staggered with the fourth valve seat port 111, the fourth valve port 212 is blocked by the valve seat bottom wall 151, and the first flow channel 120 is blocked by the side wall 214 of the bottom core.

[0082] In the above embodiment of the present application, every time the valve core 200 rotates 90°, the three communication states of the valve core 200 directly connecting with the first flow channel 120, the second flow channel 130 and the outside of the regulating valve 1000 can be completely switched.

[0083] In the present application, the valve core 200 can also rotate relative to the valve seat 100 at a smaller rotation angle, thereby achieving higher humidity control accuracy for the regulating valve 1000. For example, in the initial state where the first valve port 211 of the valve core 200 is connected to the first flow channel 120, the fourth valve port 212 is offset from the fourth valve seat port 111, the fourth valve port 212 is blocked by the valve seat bottom wall 151, and the second flow channel 130 is blocked by the side wall 214 of the bottom core body, the valve core 200 is rotated 45° relative to the valve seat 100. At this point, the first valve port 211 is semi-connected to the first flow channel 120, the fourth valve port 212 is semi-connected to the fourth valve seat port 111, and the second flow channel 130 is blocked. The cathode reactant gas can partially enter the regulating valve 1000 through the first valve seat port 121 and partially enter the regulating valve 1000 through the fourth valve seat port 111.

[0084] In some embodiments, the fourth valve seat opening 111 is an arc-shaped opening or a fan-shaped opening with an angle of less than or equal to 90°, and the fourth valve opening 212 is an arc-shaped opening or a fan-shaped opening with an angle of less than or equal to 90°; or, the fourth valve seat opening 111 is two arc-shaped openings or fan-shaped openings that are oppositely arranged and are less than or equal to 90°, and the fourth valve opening 212 is two arc-shaped openings or fan-shaped openings that are oppositely arranged and are less than or equal to 90°; the valve core 200 can be rotated until the first valve port 211 is completely correspondingly connected with the first flow channel 120 or the second flow channel 130, and the fourth valve port 212 is staggered with the fourth valve seat port 111, that is, the cathode reaction gas cannot enter the valve core 200 through the fourth valve seat port 111 and the fourth valve port 212.

[0085] Optionally, the fourth valve seat opening 111 is an arc-shaped opening or a fan-shaped opening less than 90°, and the fourth valve opening 212 is an arc-shaped opening or a fan-shaped opening less than 90°; or, the fourth valve seat opening 111 is two arc-shaped openings or fan-shaped openings that are oppositely arranged and less than 90°, and the fourth valve opening 212 is two arc-shaped openings or fan-shaped openings that are oppositely arranged and less than 90°; when the valve core 200 rotates to the point where the first valve port 211 is completely correspondingly connected with the first flow channel 120 or the second flow channel 130, the fourth valve port 212 and the fourth valve seat port 111 are completely staggered and not connected with each other.

[0086] Optionally, the radian of the arc-shaped opening or fan-shaped opening serving as the fourth valve port 212 can be made smaller than or equal to the radian of the arc-shaped opening or fan-shaped opening serving as the fourth valve seat port 111, so as to further ensure that when the valve core 200 rotates to the point where the first valve port 211 is completely connected to the first flow channel 120 or the second flow channel 130, the fourth valve port 212 and the fourth valve seat port 111 are completely staggered and not connected to each other.

[0087] In some embodiments, as shown in FIG. 10 , the diameter of the arc-shaped opening or fan-shaped opening serving as the fourth valve port 212 may be smaller than or equal to the diameter of the arc-shaped opening or fan-shaped opening serving as the fourth valve seat port 111 .

[0088] It should be noted that the center of the arc-shaped opening or fan-shaped opening serving as the fourth valve port 212 coincides with the center of the arc-shaped opening or fan-shaped opening serving as the fourth valve seat port 111, to ensure that during the rotation of the valve core 200 relative to the valve seat 100, the fourth valve port 212 can completely coincide with the fourth valve seat port 111, thereby achieving the maximum opening state of the fourth valve port 212; the fourth valve port 212 can also be completely staggered from the fourth valve seat port 111, thereby achieving the closed state of the fourth valve port 212.

[0089] As an optional embodiment, the valve core 200 further includes a transmission shaft 230 disposed on the top core body 220 . The transmission shaft 230 passes through the core cavity 110 and is located outside the valve seat 100 .

[0090] In some embodiments, as shown in Figure 7, a transmission shaft 230 can be set on the top surface 221 of the top core body. Accordingly, a through hole can be opened on the valve seat top wall 153, so that the through hole passes through the core cavity 110 and the outside of the valve seat 100, so that the transmission shaft 230 can pass through the through hole and be located outside the valve seat 100. A driving device can be provided on the valve seat top wall 153, and the transmission shaft 230 is driven to rotate by the driving device, thereby achieving the purpose of driving the valve core 200 to rotate, so that the regulating valve 1000 can be automatically controlled.

[0091] In some embodiments, the driving device can be a motor 300, which drives the valve core 200 to rotate relative to the valve seat 100, so that the rotation range of the valve core 200 is at least 0° to 180°. Optionally, the rotation range of the valve core 200 can also be 0° to 270° or 0° to 360°.

[0092] Optionally, within the above rotation range, the valve core 200 can stop at any rotation position in the core cavity 110 according to the humidity adjustment target of the cathode reactant gas.

[0093] It should be noted that in order for the valve core 200 to rotate stably, the rotation axis of the transmission shaft 230 needs to coincide with the rotation axis of the valve core 200 , that is, the transmission shaft 230 needs to be set at the center of the top surface 221 of the top core body.

[0094] In the above embodiment, optionally, as shown in Figures 7, 9 and 11, the length of the third flow channel 140 in the vertical direction can be equal to the length of the top core 220 in the vertical direction, that is, the length of the third flow channel 140 in the vertical direction is equal to the sum of the top thickness of the top core 220 and the length of the grille.

[0095] In the above embodiment, optionally, as shown in FIG3 , the diameter of the through-hole between the core cavity 110 and the third flow channel 140 is not less than the length of the grid to ensure that the cathode reaction gas passing through the grid on the top core 220 is not blocked.

[0096] In the above embodiment, optionally, as shown in Figures 7, 9 and 11, the sum of the height of the valve core 200 in the vertical direction and the thickness of the bottom wall of the valve core 200 is the same as the overall height of the valve seat 100 in the vertical direction, so that after the valve core 200 is set in the core cavity 110, the upper and lower ends of the valve core 200 are flush with the outside of the valve seat 100.

[0097] In the above-described embodiment of the present application, in order to enable each valve seat 100 port on the valve seat 100 to connect to the humidifier 2000, the valve seat 100 port may be made to protrude relative to the outer surface of the valve housing to form an interface portion, or an interface portion for connection may be provided inside each valve seat 100 port. In addition, a sealing structure such as a sealing ring may be provided at the corresponding position to ensure sealing performance after connection.

[0098] Based on the same inventive concept, the embodiment of the present application further provides a humidifier 2000, as shown in FIG. 1 to FIG. 16 , the humidifier 2000 includes:

[0099] A housing 2100 having a humidification chamber 2110 therein, and a cathode reaction gas inlet 2120 and a cathode reaction gas outlet 2160 communicating with the humidification chamber 2110 are provided on the housing 2100;

[0100] A membrane tube 2200 , wherein the membrane tube 2200 is disposed in the humidification chamber 2110 , and the housing 2100 is provided with a hot and humid exhaust gas inlet 2210 and a hot and humid exhaust gas outlet 2220 in communication with the membrane tube 2200 ; and

[0101] The above-mentioned regulating valve 1000 is arranged on the shell 2100, and the first valve seat port 121 and the second valve seat port 131 of the regulating valve 1000 are connected to the humidification chamber 2110 through the cathode reaction gas inlet 2120, or the first valve seat port 121 and the second valve seat port 131 of the regulating valve 1000 are connected to the humidification chamber 2110 through the cathode reaction gas outlet 2160.

[0102] Since the humidifier 2000 provided in the present application includes the regulating valve 1000 of the above technical solution, the humidifier 2000 provided in the present application has all the beneficial effects of the above regulating valve 1000, which will not be elaborated here.

[0103] As an optional embodiment, the valve seat 100 is provided with a fourth valve seat port 111 connected to the core cavity 110 of the valve core 200, and the fourth valve seat port 111, the first valve seat port 121 and the second valve seat port 131 are located on the same side of the valve seat 100; the valve core 200 is provided with a fourth valve port 212 connected to the second valve port 223, and the valve core 200 rotates relative to the valve seat 100 so that the first valve port 211 is connected to the first flow channel 120 or the second flow channel 130 accordingly, or the fourth valve port 212 is connected to the fourth valve seat port 111; the fourth valve seat port 111 is connected to the humidification chamber 2110.

[0104] In some embodiments, as shown in Figures 13 to 16, a humidifier 2000 includes a housing 2100. A potting partition 2130 is provided within the housing 2100 to divide the space within the housing 2100 into a hot and humid exhaust gas inlet flow channel 2140, a humidification chamber 2110, and a hot and humid exhaust gas outlet flow channel 2150. A plurality of relatively parallel membrane tubes 2200 are disposed in the humidification chamber 2110, with both ends of the membrane tubes 2200 passing through the potting partition 2130 and positioned in the hot and humid exhaust gas inlet flow channel 2140, the humidification chamber 2110, and the hot and humid exhaust gas outlet flow channel 2150, respectively. A wet hot exhaust gas inlet 2210 is provided in the portion of the shell 2100 corresponding to the wet hot exhaust gas inlet flow channel 2140, and a wet hot exhaust gas outlet 2220 is provided in the portion of the shell 2100 corresponding to the wet hot exhaust gas outlet flow channel 2150, so that the wet hot exhaust gas can flow through the humidifier 2000 along the path of the wet hot exhaust gas inlet 2210, the wet hot exhaust gas inlet flow channel 2140, the membrane tube 2200, the wet hot exhaust gas outlet flow channel 2150, and the wet hot exhaust gas outlet 2220. A cathode reaction gas inlet 2120 and a cathode reaction gas outlet 2160 are provided in the shell 2100 corresponding to the humidification chamber 2110. The cathode reaction gas can enter the humidification chamber 2110 through the cathode reaction gas inlet 2120, exchange heat with the hot and humid exhaust gas in the membrane tube 2200 in the humidification chamber 2110, and mix with the water released from the membrane tube 2200 to increase the humidity of the cathode reaction gas, and then be discharged from the humidification chamber 2110 through the cathode reaction gas outlet 2160.

[0105] In some embodiments, as shown in Figures 14 to 16 , the cathode reactant gas inlet 2120 and the cathode reactant gas outlet 2160 may each be provided with a pipe joint protruding from the housing 2100 to facilitate connection with the cathode reactant gas pipeline or with the respective valve seats 100 of the regulating valve 1000. The hot and humid exhaust gas inlet 2210 and the hot and humid exhaust gas outlet 2220 may each be provided with a pipe joint protruding from the housing 2100 to facilitate connection with the hot and humid exhaust gas pipeline.

[0106] In some embodiments, as shown in Figures 14 to 16 , regulating valve 1000 can communicate with cathode reactant gas outlet 2160 of humidifier 2000. Accordingly, three cathode reactant gas outlets 2160 are defined on housing 2100, with the positions of the three cathode reactant gas outlets 2160 corresponding to first valve seat opening 121, second valve seat opening 131, and fourth valve seat opening 111 of regulating valve 1000. As shown in Figures 14 to 16 , first cathode reactant gas outlet 2161 corresponds to and communicates with first valve seat opening 121, second cathode reactant gas outlet 2162 corresponds to and communicates with second valve seat opening 131, and fourth cathode reactant gas outlet 2163 corresponds to and communicates with fourth valve seat opening 111.

[0107] As shown in FIG14 , when the regulating valve 1000 is in the state where the first valve port 211 is connected to the first flow channel 120, the hot and humid exhaust gas enters the hot and humid exhaust gas inlet flow channel 2140 through the hot and humid exhaust gas inlet 2210, enters the interior of a series of membrane tubes 2200 to enter the humidification chamber 2110, exchanges heat and humidity with the cathode reaction gas, and water migrates to the outside of the membrane tube 2200 and mixes with the cathode reaction gas; the cathode reaction gas enters the humidification chamber 2110 through the cathode reaction gas inlet 2120. Located outside membrane tube 2200, the gas exchanges heat and humidity with the hot and humid exhaust gas in humidification chamber 2110 to be heated and humidified. The gas then flows sequentially through first cathode reactant gas outlet 2161, first valve seat opening 121, first flow channel 120, first valve opening 211, valve core 200, second valve opening 223, third flow channel 140, and third valve seat opening 141. The cathode reactant gas exiting humidifier 2000 can then communicate with the cathode of fuel cell 3600. At this point, the effective exchange length (left-right direction in the figure) between the inside and outside of membrane tube 2200 is relatively small, resulting in relatively low exchange efficiency.

[0108] As shown in FIG15 , when the regulating valve 1000 is in a state where the fourth valve port 212 is correspondingly connected to the fourth valve seat port 111, the hot and humid exhaust gas enters the hot and humid exhaust gas inlet flow channel 2140 through the hot and humid exhaust gas inlet 2210, enters the interior of a series of membrane tubes 2200, and then enters the humidification chamber 2110, where it exchanges heat and humidity with the cathode reactant gas. Water migrates to the outside of the membrane tubes 2200 and mixes with the cathode reactant gas. The cathode reactant gas enters the humidification chamber 2110 through the cathode reactant gas inlet 2120 and is located outside the membrane tubes 2200. In the humidification chamber 2110, it exchanges heat and humidity with the hot and humid exhaust gas to be heated and humidified. Thereafter, the cathode reactant gas may sequentially flow through the fourth cathode reactant gas outlet 2163, the fourth valve seat port 111, the fourth valve port 212, the valve core 200, the second valve port 223, the third flow channel 140, and the third valve seat port 141. The cathode reactant gas exiting the humidifier 2000 may be connected to the cathode of the fuel cell 3600. At this time, the effective exchange lengths inside and outside the membrane tube 2200 (left and right directions in the figure) are relatively centered, and the exchange efficiency is relatively centered.

[0109] As shown in FIG16 , when the regulating valve 1000 is in the state where the first valve port 211 is connected to the second flow channel 130, the hot and humid exhaust gas enters the hot and humid exhaust gas inlet flow channel 2140 through the hot and humid exhaust gas inlet 2210, enters the interior of a series of membrane tubes 2200 to enter the humidification chamber 2110, exchanges heat and humidity with the cathode reaction gas, and water migrates to the outside of the membrane tube 2200 and mixes with the cathode reaction gas; the cathode reaction gas enters the humidification chamber 2110 through the cathode reaction gas inlet 2120. Located outside membrane tube 2200, the cathode reactant gas exchanges heat and humidity with the hot and humid exhaust gas in humidification chamber 2110, thereby being heated and humidified. The gas then flows sequentially through second cathode reactant gas outlet 2162, second valve seat opening 131, second flow channel 130, first valve opening 211, valve core 200, second valve opening 223, third flow channel 140, and third valve seat opening 141. The cathode reactant gas exiting humidifier 2000 can then communicate with the cathode of fuel cell 3600. In this case, the effective exchange length (left-right direction in the figure) between the inside and outside of membrane tube 2200 is relatively large, resulting in relatively high exchange efficiency.

[0110] In the embodiment of the present application, the position of the cathode reaction gas outlet 2160 can be controlled by the regulating valve 1000 to adjust the humidity of the cathode reaction gas.

[0111] As an optional embodiment, the regulating valve 1000 is disposed on a side of the housing 2100 opposite to the cathode reactant gas inlet 2120 .

[0112] In some embodiments, as shown in Figures 14 to 16 , regulating valve 1000 is disposed on a side of housing 2100 opposite cathode reactant gas inlet 2120. A cathode reactant gas outlet 2160 is disposed on a side of housing 2100 opposite cathode reactant gas inlet 2120, with cathode reactant gas outlet 2160 correspondingly connected to regulating valve 1000. As shown in Figures 14 to 16 , the cathode reactant gas flows through a relatively long path in the vertical direction of the figures, thereby improving the overall humidification efficiency of humidifier 2000.

[0113] As an optional implementation, any one of the first valve seat opening 121 , the second valve seat opening 131 and the fourth valve seat opening 111 is disposed opposite to the cathode reactant gas inlet 2120 .

[0114] In some embodiments, any one of the first valve seat port 121, the second valve seat port 131, and the fourth valve seat port 111 can be arranged opposite to the cathode reaction gas inlet 2120, so that the distance between the valve seat 100 port arranged opposite to the cathode reaction gas inlet 2120 and the cathode reaction gas inlet 2120 can be the shortest, and its humidification efficiency can be relatively low. At the same time, the distances between the remaining valve seat 100 ports and the cathode reaction gas inlet 2120 can be made different, so that the humidifier 2000 can have different humidification efficiencies.

[0115] In other embodiments, the cathode reaction gas inlet 2120 of the humidifier 2000 can be connected to a regulating valve 1000, or the cathode reaction gas inlet 2120 and the cathode reaction gas outlet 2160 of the humidifier 2000 are simultaneously connected to a regulating valve 1000. The manner in which the regulating valve 1000 regulates the humidification efficiency of the humidifier 2000 is the same as that in the aforementioned embodiment and will not be repeated here.

[0116] Based on the same inventive concept, an embodiment of the present application further provides a fuel cell system, as shown in FIG17 , which includes the above-mentioned humidifier 2000 .

[0117] Since the fuel cell system provided in the present application includes the humidifier 2000 of the above technical solution, the fuel cell system provided in the present application has all the beneficial effects of the above humidifier 2000, which will not be described in detail here.

[0118] In the following embodiments of the present application, the fuel cell system is described by taking the cathode reaction gas as air as an example, but the cathode reaction gas is not limited to air.

[0119] In some embodiments, optionally, as shown in FIG17 , the controller 3900 is signal-connected to each component in the fuel cell system for information exchange and control of each component.

[0120] Before entering the cathode 3610 of the fuel cell 3600, the cathode reactant gas flows sequentially through the air filter 3100, air flow meter 3200, air compressor 3300, intercooler 3400, and humidifier 2000. Specifically, the air filter 3100, air flow meter 3200, air compressor 3300, intercooler 3400, humidifier 2000, and cathode reactant gas inlet 3611 are connected in sequence via a pipeline. Fresh, dry air, serving as the cathode reactant gas, is filtered through the air filter 3100 and then enters the air flow meter 3200 for flow measurement. It is then pressurized and heated by the air compressor 3300, cooled by the intercooler 3400, and then enters the humidifier 2000 for heat and moisture exchange. After being humidified by the hot and humid exhaust gas, the fresh air, now at a certain humidity, enters the fuel cell stack as the cathode reactant gas for the electrochemical reaction.

[0121] The hot and humid exhaust gas generated by the reaction of the fuel cell 3600 is discharged from the fuel cell 3600 and flows through the humidifier 2000 and the mixing device 3800 in sequence, that is, the hot and humid exhaust gas outlet 3612, the humidifier 2000 and the mixing device 3800 are connected in sequence through pipelines.

[0122] The pipeline between the intercooler 3400 and the humidifier 2000 can also be connected to the mixing device 3800 through a branch pipe, and a pressure relief valve 3710 can be provided on the branch pipe to prevent the pressure of the cathode reaction gas entering the humidifier 2000 from being too high.

[0123] A back pressure valve 3720 may be provided on the pipeline between the humidifier 2000 and the mixing device 3800. The back pressure valve 3720 may prevent the humid and hot exhaust gas from flowing back, thereby maintaining a constant pressure of the humid and hot exhaust gas in the pipeline between the humidifier 2000 and the mixing device 3800, even if the flow of the humid and hot exhaust gas flowing through the humidifier 2000 is relatively stable.

[0124] The air compressor 3300 and the mixing device 3800 may be connected via a pipeline, so that excess cathode reaction gas generated by the air compressor 3300 may be discharged to the mixing device 3800 .

[0125] A humidity sensor 3510 is provided on the pipe between the humidifier 2000 and the cathode reaction gas inlet 3611 for detecting the humidity of the cathode reaction gas before it enters the cathode, so that the humidifier 2000 can be adjusted in real time according to the detected humidity value of the cathode reaction gas. The regulating valve 1000 is regulated by the controller 3900 to adjust the humidity of the cathode reaction gas entering the stack so that the humidity of the cathode reaction gas entering the stack meets the design requirements.

[0126] A stack outlet humidity sensor 3520 is provided on the pipe between the humidifier 2000 and the hot and humid exhaust gas outlet 3612, which is used to detect the humidity of the hot and humid exhaust gas before it enters the humidifier 2000, so that the humidifier 2000 can be adjusted in real time according to the detected humidity value of the hot and humid exhaust gas. The regulating valve 1000 is regulated by the controller 3900 to adjust the humidity of the cathode reaction gas entering the stack so that the humidity of the cathode reaction gas entering the stack meets the design requirements.

[0127] In the above-described fuel cell system, the humidifier 2000 operating scheme with the highest humidity exchange efficiency can be preferentially employed to fully utilize the humidifier 2000. When the inlet humidity sensor 3510 detects that the inlet humidity of the cathode reactant gas exceeds the stack humidity requirement, the controller 3900 can adjust the state of the valve core 200 of the regulating valve 1000 to gradually reduce the humidity exchange efficiency of the humidifier 2000 until the inlet humidity of the cathode reactant gas matches the stack humidity requirement.

[0128] In the fuel cell system of the present embodiment, controller 3900 merely adjusts the rotation angle of valve core 200 in regulating valve 1000 based on the inlet humidity of the cathode reactant gas detected by inlet humidity sensor 3510, thereby achieving the desired adjustment of the inlet humidity of the cathode reactant gas. This fuel cell system is compact, lacks redundant piping and connectors, and eliminates leaks. Furthermore, the control process is simple, requiring only the acquisition of the inlet humidity of the cathode reactant gas detected by the inlet humidity sensor and the subsequent adjustment of the rotation angle of valve core 200 in regulating valve 1000.

[0129] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0130] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0131] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0132] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0133] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A regulating valve, comprising: A valve seat, wherein a core cavity and a first flow channel, a second flow channel and a third flow channel are respectively connected to the core cavity, and the valve seat is provided with a first valve seat opening connected to the first flow channel, a second valve seat opening connected to the second flow channel and a third valve seat opening connected to the third flow channel, the first valve seat opening and the second valve seat opening are located on the same side of the valve seat; and A valve core, wherein the valve core is rotatably arranged in the core cavity, and the valve core is provided with a first valve port and a second valve port which are interconnected. The rotation of the valve core relative to the valve seat enables the first valve port to be correspondingly connected with the first flow channel or the second flow channel, and the second valve port is used to be connected with the third flow channel.

2. The regulating valve according to claim 1, wherein: The valve seat is provided with a fourth valve seat opening communicating with the core cavity, and the fourth valve seat opening, the first valve seat opening and the second valve seat opening are located on the same side of the valve seat; The valve core is provided with a fourth valve port communicating with the second valve port, and the valve core can rotate relative to the valve seat so that the fourth valve port is communicated with the fourth valve seat port correspondingly.

3. The regulating valve according to claim 2, wherein: The valve core includes a bottom core body in a hollow cylindrical structure and a top core body in a hollow cylindrical structure; wherein the first valve port is opened on the side wall of the bottom core body, the fourth valve port is opened on the bottom surface of the bottom core body, and the second valve port is opened on the side wall of the top core body.

4. The regulating valve according to claim 3, wherein: The distribution range of the first valve openings on the side wall of the bottom core is less than or equal to 90°.

5. The regulating valve according to claim 3 or 4, wherein: The fourth valve seat opening is an arc-shaped opening or a fan-shaped opening of less than or equal to 90°, and the fourth valve port is an arc-shaped opening or a fan-shaped opening of less than or equal to 90°; or, the fourth valve seat opening is two arc-shaped openings or fan-shaped openings that are oppositely arranged and less than or equal to 90°, and the fourth valve port is two arc-shaped openings or fan-shaped openings that are oppositely arranged and less than or equal to 90°; and when the first valve port is not connected with the first flow channel or the second flow channel, the fourth valve port is connected with the fourth valve seat port.

6. The regulating valve according to claim 3, wherein: The valve core further comprises a transmission shaft arranged on the top core body, and the transmission shaft passes through the core cavity and is located outside the valve seat.

7. A humidifier, comprising: A shell, wherein the shell has a humidification chamber, and the shell is provided with a cathode reaction gas inlet and a cathode reaction gas outlet connected to the humidification chamber; A membrane tube, wherein the membrane tube is arranged in the humidification chamber, and the shell is provided with a humid hot exhaust gas inlet and a humid hot exhaust gas outlet communicated with the membrane tube; as well as The regulating valve according to any one of claims 1 to 6, wherein the regulating valve is arranged on the shell, and the first valve seat port and the second valve seat port of the regulating valve are connected to the humidification chamber through the cathode reaction gas inlet, or the first valve seat port and the second valve seat port of the regulating valve are connected to the humidification chamber through the cathode reaction gas outlet.

8. The humidifier according to claim 7, wherein: The valve seat is provided with a fourth valve seat opening connected to the valve core cavity, and the fourth valve seat opening, the first valve seat opening and the second valve seat opening are located on the same side of the valve seat; the valve core is provided with a fourth valve opening connected to the second valve opening, and the valve core rotates relative to the valve seat to make the first valve opening connected to the first flow channel or the second flow channel correspondingly, or to make the fourth valve opening connected to the fourth valve seat opening; the fourth valve seat opening is connected to the humidification chamber.

9. The humidifier according to claim 8, wherein: The regulating valve is arranged on a side of the shell opposite to the cathode reaction gas inlet.

10. The humidifier according to claim 9, wherein: Any one of the first valve seat opening, the second valve seat opening and the fourth valve seat opening is arranged opposite to the cathode reaction gas inlet.

11. A fuel cell system, comprising the humidifier according to any one of claims 7 to 10.

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