Humidifier with water distribution function and fuel cell system

Abstract

The utility model relates to the technical field of fuel cells, and provides a humidifier with a water distribution function and a fuel cell system, the humidifier comprises a humidifier shell, a flow blocking assembly and a plurality of humidifying membrane tubes, the upper part of the humidifier shell is provided with a moisture inlet and a moisture outlet, and the moisture inlet is connected with an outlet of an electric pile; the humidifying film pipes are arranged in the humidifier shell, and the flow blocking assembly is arranged at a moisture outlet in the humidifier shell and used for blocking liquid water in exhaust gas. According to the utility model, tail exhaust gas after a galvanic pile reaction enters the interior of the humidifier shell through the moisture inlet, the flow rate of the gas is slowed down after the tail exhaust gas collides with the humidifying membrane tube, and large-particle liquid water drops to the bottom of the humidifier shell due to gravity and collides with small-particle liquid water in the tail exhaust gas through the flow blocking assembly, so that the tail exhaust gas is humidified. The liquid water in the exhaust gas is blocked, the humidifier is used for separating the liquid water in the exhaust gas, an existing gas-water separator is omitted, and therefore the cost and the integration complexity are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a humidifier with a water separation function and a fuel cell system. Background Art

[0002] In a high-power fuel cell system, an air compressor is required to provide the pressure and flow rate of compressed gas, and the auxiliary power used is relatively large; the tail gas discharged after the reaction of the stack can provide a large amount of energy; an energy recovery air compressor can recover this part of energy. However, in actual operating conditions, the tail gas of the fuel cell stack is a high-humidity gas, which contains a large amount of liquid water. The liquid water will impact the impeller of the energy recovery air compressor and affect the life of the vortex end of the energy recovery air compressor. Therefore, before the gas enters the energy recovery air compressor, it is necessary to separate the liquid water contained in the tail gas and separate the internal liquid water.

[0003] In the existing fuel cell system, the gas enters the stack after being humidified by the humidifier, and the tail gas after the reaction of the stack is separated from the liquid water by the gas-water separator.

[0004] However, the method of adding a gas-water separator to separate liquid water will increase the material cost and integration complexity of the system. Summary of the Utility Model

[0005] The utility model provides a humidifier with a water separation function and a fuel cell system to solve the defects of increasing cost and integration complexity in the prior art.

[0006] The utility model provides a humidifier with a water separation function, which includes a humidifier housing, a baffle assembly and a plurality of humidification membrane tubes. A wet gas inlet and a wet gas outlet are arranged at the upper part of the humidifier housing, and the wet gas inlet is used to connect the outlet of the stack; a plurality of humidification membrane tubes are arranged in the humidifier housing, and a flow channel outside the tube is formed between the outer wall of the humidification membrane tube and the humidifier housing; the baffle assembly is arranged at the position of the wet gas outlet in the humidifier housing, and the baffle assembly is used to block the liquid water in the tail gas.

[0007] According to the humidifier with a water separation function provided by the utility model, the baffle assembly includes a first baffle and / or a second baffle. The first baffle is located in the middle of the vertical projection of the wet gas outlet. The second baffle is hollow, the first end of the second baffle is connected to the wet gas outlet, and the second end of the second baffle is communicated with the flow channel outside the tube.

[0008] According to the humidifier with a water separation function provided by the utility model, the bottom surface of the first baffle is spherical.

[0009] According to a humidifier with a water separation function provided by the present utility model, the second baffle member includes a diversion pipe and a blocking pipe. The first end of the diversion pipe is connected to the moisture outlet. The first end of the blocking pipe is connected to the second end of the diversion pipe. There is a distance between the second end of the blocking pipe and the outer wall of the humidifying membrane pipe. The cross-section of the blocking pipe gradually increases from the first end to the second end.

[0010] According to a humidifier with a water separation function provided by the present utility model, it further includes a drainage assembly. A drainage port is opened at the lower part of the humidifier housing. The drainage assembly includes a drainage valve and a gas blocking plate. The drainage valve is connected to the drainage port. The gas blocking plate covers the position of the drainage port. The gas blocking plate and the inner wall of the humidifier housing enclose a drainage cavity, and the drainage cavity is communicated with the outer-channel of the pipe.

[0011] According to a humidifier with a water separation function provided by the present utility model, there is a gap between the edge of the gas blocking plate and the inner wall of the humidifier housing, and the gap forms a drainage channel for communicating the drainage cavity with the outer-channel of the pipe.

[0012] According to a humidifier with a water separation function provided by the present utility model, the bottom surface height of the humidifier housing gradually increases from the drainage port to the outside.

[0013] According to a humidifier with a water separation function provided by the present utility model, several humidifying membrane pipes are evenly distributed in the humidifier housing.

[0014] The present utility model also provides a fuel cell system, which includes an air compressor, an electric stack, and the humidifier with a water separation function described in any one of the above. The outlet of the electric stack is connected to the moisture inlet, and the moisture outlet is connected to the vortex end inlet of the air compressor.

[0015] According to a fuel cell system provided by the present utility model, a pipe inner-channel is formed inside the humidifying membrane pipe. The humidifier housing has a dry gas inlet and a dry gas outlet that are communicated with several humidifying membrane pipes. The dry gas inlet is connected to the gas outlet of the air compressor, and the dry gas outlet is connected to the inlet of the electric stack.

[0016] For the humidifier with a water separation function provided by the present utility model, the tail gas discharged after the reaction of the electric stack enters the inside of the humidifier housing through the moisture inlet. After the tail gas collides with the humidifying membrane pipe, the gas flow rate slows down. Large-particle liquid water drops to the bottom of the humidifier housing due to gravity, and collides with small-particle liquid water in the tail gas through the baffle assembly at the moisture outlet to block the liquid water in the tail gas, so as to realize the separation of liquid water in the tail gas. It can be seen that the present utility model uses the humidifier in the fuel cell system to separate the liquid water in the tail gas, eliminating the existing gas-water separator, thereby reducing costs and integration complexity. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of a humidifier with a water separation function provided by the present utility model.

[0019] Reference numerals: 1, humidifier housing; 11, moisture inlet; 12, moisture outlet; 13, dry gas inlet; 14, dry gas outlet; 101, diversion chamber; 102, collection chamber; 2, humidification membrane tube; 3, baffle assembly; 31, first baffle; 32, second baffle; 4, drainage assembly; 41, drain valve; 42, air blocking plate. Detailed Embodiments

[0020] The following will further describe in detail the embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0021] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0023] In the embodiments of the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0024] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0025] An embodiment of the first aspect of the present utility model provides a humidifier with a water separation function. Figure 1 The structural schematic diagram of the humidifier with a water separation function provided by the present utility model is illustrated, as Figure 1 shown, the humidifier with a water separation function includes a humidifier housing 1, a baffle assembly 3 and a plurality of humidifying membrane tubes 2 disposed in the humidifier housing 1.

[0026] Wherein, a moisture inlet 11 and a moisture outlet 12 are provided at the upper part of the humidifier housing 1; a plurality of humidifying membrane tubes 2 are disposed in the humidifier housing 1, and a flow channel outside the tube is formed between the outer wall of the humidifying membrane tube 2 and the humidifier housing 1; the baffle assembly 3 is disposed at the position of the moisture outlet 12 in the humidifier housing 1, and the baffle assembly 3 is used to block the liquid water in the tail exhaust gas.

[0027] It can be understood that the outlet of the fuel cell stack is connected to the moisture inlet 11, and the gas humidified by the humidification membrane tube 2 in the humidifier shell 1 enters the fuel cell stack for reaction. After the reaction, the outlet of the fuel cell stack produces tail gas, which is a high-humidity tail gas containing liquid water. The tail gas enters the humidifier shell 1 through the moisture inlet 11 on the humidifier shell 1. After the tail gas containing liquid water enters the humidifier shell 1, the gas flow rate slows down after colliding with the humidification membrane tube 2. Large particles of liquid water fall to the bottom of the humidifier shell 1 due to gravity, and small particles of liquid water will move to the moisture outlet 12 with the gas. The small particles of liquid water in the gas at the moisture outlet 12 collide with the baffle assembly 3 and fall into the humidifier shell 1, and gather at the bottom of the humidifier shell 1, thereby realizing the separation of liquid water in the tail gas.

[0028] The humidifier with water separation function provided by the utility model allows the tail gas after the reaction of the battery stack to enter the interior of the humidifier housing 1 through the wet gas inlet 11. After the tail gas collides with the humidifying membrane tube 2, the gas flow rate slows down, and the large particles of liquid water fall to the bottom of the humidifier housing 1 due to gravity, and collide with the small particles of liquid water in the tail gas through the flow blocking component 3 of the wet gas outlet 12, blocking the liquid water in the tail gas, so as to achieve the separation of liquid water in the tail gas. It can be seen that the utility model uses the humidifier in the fuel cell system to separate the liquid water in the tail gas, eliminating the existing gas-water separator, thereby reducing the cost and integration complexity.

[0029] In one embodiment of the utility model, the baffle assembly 3 includes a first baffle member 31, which is arranged inside the humidifier housing 1 and located in the middle of the vertical projection of the wet gas outlet 12. The first baffle member 31 blocks the liquid water carried in the tail exhaust gas and retains it inside the humidifier housing 1.

[0030] Optionally, the bottom surface of the first baffle 31 is spherical to increase the blocking area of ​​the tail gas. Figure 1 As shown, the first baffle 31 may be a hemispherical baffle convex away from the wet gas outlet 12; of course, the first baffle 31 may be a hemispherical baffle convex toward the wet gas outlet 12. In other embodiments, the first baffle 31 may also be a horizontally arranged flat plate, curved plate or other plate-like structure to block the liquid water carried in the exhaust gas.

[0031] In another embodiment of the utility model, the baffle assembly 3 includes a second baffle member 32, which is hollow. The first end of the second baffle member 32 is connected to the wet gas outlet 12, and the second end of the second baffle member 32 is connected to the external flow channel of the tube. The inner wall of the second baffle member 32 blocks the liquid water carried in the tail exhaust gas and keeps it inside the humidifier housing 1.

[0032] Specifically, the second baffle 32 includes a diversion pipe and a blocking pipe. The first end of the diversion pipe is connected to the moisture outlet 12. The first end of the blocking pipe is connected to the second end of the diversion pipe. There is a distance between the second end of the blocking pipe and the outer wall of the humidifying film tube 2. The cross-section of the blocking pipe gradually increases from the first end to the second end.

[0033] It can be understood that the diversion pipe at the upper part of the second baffle 32 is connected to the moisture outlet 12, and the cross-section of the blocking pipe at the lower part of the second baffle 32 gradually increases from the upper end to the lower end, which can prevent the liquid water inside the humidifier housing 1 from being blown by water and flowing along the inner wall of the second baffle 32 into the moisture outlet 12 and flowing out of the humidifier.

[0034] Exemplarily, the blocking pipe is arc-shaped. When the liquid water flows on the inner wall of the blocking pipe, the arc-shaped inner wall of the blocking pipe blocks the liquid water from flowing on the inner wall and falls to the bottom of the humidifier housing 1 under the action of gravity.

[0035] Preferably, the baffle assembly 3 includes both the first baffle 31 and the second baffle 32 at the same time. It should be noted here that there is a distance between the edge of the first baffle 31 and the inner wall of the second baffle 32 to provide a discharge channel for the gas. Exemplarily, the first baffle 31 is arranged in the middle of the lower end of the diversion pipe. Thus, the liquid water carried in the tail gas is separated by the blocking action of the blocking pipe and the blocking action of the first baffle 31, and the tail gas from which the liquid water is separated flows out through the discharge channel between the first baffle 31 and the diversion pipe.

[0036] In an embodiment of the present invention, a drain port is opened at the lower part of the humidifier housing 1, and the humidifier further includes a drain assembly 4 arranged at the position of the drain port. The drain assembly 4 is used to drain the liquid water in the humidifier housing 1.

[0037] Optionally, the drain assembly 4 includes a drain valve 41 and an air blocking plate 42. The drain valve 41 is arranged outside the humidifier housing 1 and connected to the drain port; the air blocking plate 42 is arranged inside the humidifier housing 1 and covers the position of the drain port. The air blocking plate 42 and the inner wall of the humidifier housing 1 enclose a drain cavity, and the drain cavity is communicated with the outer flow channel of the pipe.

[0038] It can be understood that after the liquid water in the humidifier housing 1 reaches a certain position, the drain valve 41 is opened, and the liquid water flows out from the drain valve 41. It should be noted here that the air blocking plate 42 arranged in the humidifier housing 1 is used to prevent the inside of the humidifier housing 1 from communicating with the outside atmosphere, causing pressure fluctuations inside the humidifier housing 1. At the same time, the air blocking plate 42 can also play a role in restricting the flow rate.

[0039] Optionally, the air baffle plate 42 is connected to the drain outlet, and there is a gap between the edge of the air baffle plate 42 and the inner wall of the humidifier housing 1, and the gap serves as a drainage channel connecting the drainage cavity and the outer flow channel of the tube. For example, the air baffle plate 42 is a hemispherical plate-like structure that is convex away from the drain outlet, and the edge of the air baffle plate 42 has a connecting portion extending outward in the horizontal direction. The connecting portion and the humidifier housing 1 are connected by a plurality of circumferentially arranged connecting members, which may be connecting screws. Of course, the connecting member may also be a support rod welded between the connecting portion and the humidifier housing 1. It should be noted here that a drainage channel is formed between two adjacent connecting members. Preferably, the plurality of connecting members are evenly distributed along the axial direction, and the drainage channel between the drainage cavity and the outer flow channel of the tube is also a plurality of circumferentially evenly distributed.

[0040] In one embodiment of the present invention, the bottom height of the humidifier housing 1 gradually increases from the drain outlet to the outside, so that the drain outlet is located at the lowest position of the humidifier housing 1, which facilitates the rapid discharge of liquid water in the humidifier housing 1.

[0041] For example, the drain port is located in the middle of the bottom surface of the humidifier housing 1, and the bottom surface height of the humidifier housing 1 gradually increases from the drain port to the outside, so that the bottom surface of the humidifier housing 1 is an inclined surface inclined from the outside to the middle.

[0042] In one embodiment of the present invention, the humidifying membrane tube 2 is a porous pipeline made of water-absorbing material, an inner flow channel is formed in the humidifying membrane tube 2, and the humidifier housing 1 has a dry gas inlet 13 and a dry gas outlet 14 connected to a plurality of humidifying membrane tubes 2.

[0043] For example, a dry gas inlet 13 and a dry gas outlet 14 are respectively provided on the left and right sides of the humidifier housing 1, a diversion cavity 101 connecting the dry gas inlet 13 and the inlet ends of all humidification membrane tubes 2 is constructed in the humidification membrane tube 2, and a collecting cavity 102 connecting the dry gas outlet 14 and the outlet ends of all humidification membrane tubes 2 is also constructed in the humidification membrane tube 2.

[0044] It can be understood that the dry air first enters the shunt chamber 101 through the dry gas inlet 13, and the gas enters the inlet end of the humidifying membrane tube 2 through the shunt chamber 101. The liquid water and high humidity gas enter the humidifying membrane tube 2 after being adsorbed on the surface of the humidifying membrane tube 2, and the dry air inside the humidifying membrane tube 2 is humidified. The gas humidified in the humidifying membrane tube 2 is collected again in the manifold 102, and then enters the battery stack through the dry gas outlet 14. It should be noted here that the humidification efficiency of the dry air inside the humidifying membrane tube 2 is determined by the humidifying membrane tube 2 and its working conditions, and can be reasonably designed according to needs.

[0045] Preferably, several humidifying membrane tubes 2 are evenly distributed in the humidifier housing 1; the humidifying membrane tubes 2 can have equal or unequal diameters. When the humidifying membrane tubes 2 have unequal diameters, the humidifying membrane tubes 2 with larger through-hole diameters are selected near the moisture inlet 11 and the moisture outlet 12. The humidifying membrane tubes 2 with larger through-hole diameters and the humidifying membrane tubes 2 with smaller through-hole diameters can be arranged alternately to increase the utilization rate of the humidifying membrane tubes 2.

[0046] In an embodiment of the present invention, the cross-section of the humidifier housing 1 can be circular, oval, square or rectangular. Further, the moisture inlet 11 and the moisture outlet 12 are located on the same side of the upper part of the humidifier housing 1, and the drain port is located at the lower part of the humidifier housing 1, which is distributed in the opposite direction to the moisture inlet 11 and the moisture outlet 12.

[0047] An embodiment of the second aspect of the present invention provides a fuel cell system, which includes an air compressor, an electric stack, and the humidifier with a water separation function provided in any of the above embodiments. The outlet of the electric stack is connected to the moisture inlet 11, and the moisture outlet 12 is connected to the vortex end inlet of the air compressor.

[0048] It can be understood that the gas humidified by the humidifier enters the electric stack for reaction. After the reaction, the outlet of the electric stack generates tail gas. The tail gas enters the interior of the humidifier housing 1 through the moisture inlet 11 on the humidifier housing 1. After the tail gas containing liquid water enters the interior of the humidifier housing 1, the gas flow rate slows down after colliding with the humidifying membrane tubes 2. The large particles of liquid water drop to the bottom of the humidifier housing 1 due to gravity. The small particles of liquid water will move with the gas to the moisture outlet 12. At the moisture outlet 12, the small particles of liquid water in the gas collide with the baffle assembly 3 and fall into the humidifier housing 1, and accumulate at the bottom of the humidifier housing 1, thereby realizing the separation of the liquid water in the tail gas. The tail gas with the separated liquid water enters the vortex end inlet of the air compressor.

[0049] In the fuel cell system provided by the present invention, the tail gas after the reaction of the electric stack enters the interior of the humidifier housing 1 through the moisture inlet 11. After the tail gas collides with the humidifying membrane tubes 2, the gas flow rate slows down. The large particles of liquid water drop to the bottom of the humidifier housing 1 due to gravity, and collide with the small particles of liquid water in the tail gas through the baffle assembly 3 at the moisture outlet 12 to block the liquid water in the tail gas, so as to realize the separation of the liquid water in the tail gas. It can be seen that the present invention utilizes the space inside the humidifier to separate the liquid water in the tail gas at the outlet of the electric stack, without setting a gas-liquid separator, and utilizes the integration of the system.

[0050] It should be noted that in the prior art, a gas-liquid separator is used to separate liquid water, but the gas-liquid separator causes a large pressure loss, which is not conducive to the energy recovery of the air compressor. In contrast, the fuel cell system of the present utility model utilizes the inside of the humidifier to separate liquid water, with a smaller gas pressure loss, which is conducive to the energy recovery of the air compressor.

[0051] In a specific embodiment of the present utility model, the fuel cell system includes an air compressor, an electric stack, and a humidifier with a water separation function.

[0052] The humidifier with a water separation function includes a humidifier housing 1, a baffle assembly 3, a drainage assembly 4, and a plurality of humidifying membrane tubes 2; the humidifying membrane tubes 2 are porous pipelines made of water-absorbing materials, and a plurality of humidifying membrane tubes 2 are arranged inside the humidifier housing 1. A flow channel is formed between the outer wall of the humidifying membrane tube 2 and the humidifier housing 1. A humid gas inlet 11 and a humid gas outlet 12 communicating with the flow channel are arranged at the upper part of the humidifier housing 1; dry gas inlets 13 and dry gas outlets 14 are respectively arranged on the left and right sides of the humidifier housing 1. A flow dividing cavity 101 communicating the dry gas inlet 13 and the inlet ends of all the humidifying membrane tubes 2 is constructed inside the humidifying membrane tubes 2, and a flow collecting cavity 102 communicating the dry gas outlet 14 and the outlet ends of all the humidifying membrane tubes 2 is also constructed inside the humidifying membrane tubes 2; the baffle assembly 3 is arranged at the position of the humid gas outlet 12 inside the humidifier housing 1, and the baffle assembly 3 is used to block the liquid water in the tail exhaust gas; a drain port is opened at the lower part of the humidifier housing 1, and the drainage assembly 4 is arranged at the position of the drain port, and the drainage assembly 4 is used to drain the liquid water inside the humidifier housing 1.

[0053] The gas outlet of the air compressor is connected to the dry gas inlet 13 of the humidifier, the dry gas outlet 14 of the humidifier is connected to the inlet of the electric stack, the outlet of the electric stack is connected to the humid gas inlet 11 of the humidifier, and the humid gas outlet 12 of the humidifier is connected to the vortex end inlet of the air compressor.

[0054] The working principle of the fuel cell system in this embodiment: The high-temperature gas at the gas outlet of the air compressor enters the humidifier through the dry gas inlet 13 after being cooled by a cooler. After the dry air enters the humidifier, it first enters the flow dividing cavity 101, and the gas enters the humidifying membrane tubes 2 through the flow dividing cavity 101; after the liquid water and the high-humidity gas are adsorbed on the surface of the humidifying membrane tubes 2, they enter the humidifying membrane tubes 2 to humidify the dry air inside the humidifying membrane tubes 2. The gas humidified in the humidifying membrane tubes 2 is gathered together again in the flow collecting cavity 102, and then enters the electric stack through the dry gas outlet 14.

[0055] The humidified gas enters the electric stack for reaction and becomes high-humidity tail exhaust gas containing liquid water.

[0056] The tail exhaust gas enters the humidifier through the wet gas inlet 11. The highly humid water vapor and liquid water are evenly distributed in the cavity of the humidifier housing 1. After the tail exhaust gas containing liquid water enters the inside of the humidifier housing 1, its gas flow rate slows down after colliding with the humidification membrane tube 2. The large-particle liquid water drops to the bottom of the humidifier housing 1 due to gravity, and the small-particle liquid water will move with the gas to the wet gas outlet 12. At the wet gas outlet 12, the small-particle liquid water in the gas collides with the baffle component 3 and drops into the humidifier housing 1, and accumulates at the bottom of the humidifier housing 1, thereby realizing the separation of the liquid water in the tail exhaust gas. The tail exhaust gas with separated liquid water enters the vortex end inlet of the air compressor for energy recovery.

[0057] When the water in the humidifier housing 1 reaches a certain level, the drain valve 41 is opened, and the liquid water flows out from the drain valve 41. The air-blocking plate 42 at the upper end of the drain valve 41 is used to prevent the inside of the humidifier housing 1 from communicating with the outside atmosphere, causing pressure fluctuations inside the humidifier housing 1.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A humidifier with water separation function, characterized in that: include: A humidifier housing (1), wherein the upper portion of the humidifier housing (1) is provided with a moisture inlet (11) and a moisture outlet (12), wherein the moisture inlet (11) is used to connect to an outlet of a fuel cell stack; A plurality of humidifying membrane tubes (2) are arranged in the humidifier housing (1), and an outer tube flow channel is formed between the outer wall of the humidifying membrane tube (2) and the humidifier housing (1); The baffle assembly (3) is arranged at the position of the wet gas outlet (12) in the humidifier housing (1), and the baffle assembly (3) is used to block liquid water in the tail exhaust gas.

2. The humidifier with water separation function according to claim 1, characterized in that: The baffle assembly (3) comprises a first baffle member (31) and / or a second baffle member (32), wherein the first baffle member (31) is located in the middle of a vertical projection of the moisture outlet (12), and the second baffle member (32) is hollow, wherein a first end of the second baffle member (32) is connected to the moisture outlet (12), and a second end of the second baffle member (32) is in communication with the outer flow channel of the pipe.

3. The humidifier with water separation function according to claim 2, characterized in that: The bottom surface of the first flow blocking member (31) is spherical.

4. The humidifier with water separation function according to claim 2, characterized in that: The second flow blocking member (32) comprises a flow guide tube and a blocking tube, wherein the first end of the flow guide tube is connected to the moisture outlet (12), the first end of the blocking tube is connected to the second end of the flow guide tube, there is a distance between the second end of the blocking tube and the outer wall of the humidifying membrane tube (2), and the cross-section of the blocking tube gradually increases from the first end to the second end.

5. The humidifier with water separation function according to any one of claims 1 to 4, characterized in that: The humidifier housing (1) further comprises a drainage assembly (4), wherein a drainage outlet is provided at the lower portion of the humidifier housing (1), and the drainage assembly (4) comprises a drainage valve (41) and an air blocking plate (42), wherein the drainage valve (41) is connected to the drainage outlet; the air blocking plate (42) is arranged to cover the drainage outlet, and the air blocking plate (42) and the inner wall of the humidifier housing (1) form a drainage cavity, wherein the drainage cavity is in communication with the external flow channel of the tube.

6. The humidifier with water separation function according to claim 5, characterized in that: There is a gap between the edge of the air blocking plate (42) and the inner wall of the humidifier housing (1), and the gap forms a drainage channel connecting the drainage cavity and the outer flow channel of the tube.

7. The humidifier with water separation function according to claim 6, characterized in that: The bottom surface height of the humidifier housing (1) gradually increases from the drain outlet toward the outside.

8. The humidifier with water separation function according to any one of claims 1 to 4, characterized in that: A plurality of the humidifying membrane tubes (2) are evenly distributed in the humidifier housing (1).

9. A fuel cell system, characterized in that: It comprises an air compressor, a fuel cell stack and a humidifier with a water separation function as claimed in any one of claims 1 to 8, wherein the outlet of the fuel cell stack is connected to the moisture inlet (11), and the moisture outlet (12) is connected to the turbine end inlet of the air compressor.

10. The fuel cell system according to claim 9, characterized in that: An in-tube flow channel is formed inside the humidifying membrane tube (2), and the humidifier housing (1) has a dry gas inlet (13) and a dry gas outlet (14) connected to a plurality of the humidifying membrane tubes (2), the dry gas inlet (13) is connected to the gas outlet of the air compressor, and the dry gas outlet (14) is connected to the inlet of the fuel cell stack.

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