Fuel Cell Membrane Humidifier

Abstract

The content disclosed in this specification relates to a fuel cell membrane humidifier with improved airtightness and assemblability between a main housing, an inlet housing, and an outlet housing that are coupled to a cartridge, and can maintain high humidification efficiency by ensuring that the highly humid gas discharged from the stack of a hydrogen fuel cell contacts the entire upper, middle, and lower parts of a hollow fiber membrane module without any dead zones. The fuel cell membrane humidifier includes a main housing integrally formed with a flow-in section that forms an inflow portion for the humid gas discharged from the fuel cell, a flow-out section that forms an outflow portion for the gas, and at least one cartridge support portion formed inside the main body between the inflow portion and the outflow portion; a hollow fiber membrane cartridge including at least one outer flange spaced apart from the outside of the cartridge housing corresponding to the cartridge support portion, with a number of hollow fiber membrane modules arranged inside the cartridge housing, and the flow-in section and the flow-out section being structurally isolated by the flange when assembled into the main housing; and the hollow fiber membrane cartridge is configured to include an arrangement of an upstream distribution port, a midstream distribution port, and a downstream distribution port formed on a side wall of one side of the cartridge housing, and an arrangement of an upstream discharge port, a midstream discharge port, and a downstream discharge port formed on a side wall of the other side of the cartridge housing.

Description

Technical Field

[0001] The content disclosed in this specification relates to a fuel cell membrane humidifier. In particular, by enabling the high-humidity gas discharged from the stack of a hydrogen fuel cell to contact the entire upper, middle, and lower parts of the hollow fiber membrane module without a dead zone, high humidification efficiency can be maintained, and it relates to a fuel cell membrane humidifier with improved airtightness and assemblability between the main housing, inlet housing, and outlet housing coupled to the cartridge.

Background Art

[0002] Unless otherwise indicated in this specification, the content described in this section is not prior art with respect to the claims of this application and is not to be regarded as prior art merely by being included in this section.

[0003] Generally, hydrogen fuel cells that utilize the electricity generated during the reaction of hydrogen fuel and oxygen are being developed in various types such as polymer electrolyte fuel cells, Polymer Electrolyte Membrane Fuel Cells (PEMFC), phosphoric acid fuel cells (PAFC), and dual exchange membrane fuel cells.

[0004] In the case of polymer electrolyte fuel cells, since they operate at a lower temperature and have a large output density compared to other fuel cells, they can be miniaturized. Therefore, it is known that they are promising not only for small-scale stationary power generation equipment but also for the utilization of transportation equipment such as hydrogen vehicles.

[0005] One of the most important factors in improving the performance of such a polymer electrolyte fuel cell is to supply a certain amount of water or more to the polymer electrolyte membrane (Polymer Electolyte Membrane) [also called Proton Exchange Membrane (PEM)] of the Membrane Electrode Assembly (MEA) configured inside the fuel cell stack to maintain the water content rate. This is because when the polymer electrolyte membrane dries, the power generation efficiency drops sharply.

[0006] Since the performance of the fuel cell is greatly affected by the water content rate of the gas supplied to the stack, a membrane humidification technique for maintaining the water content rate or humidity of the supplied gas at the required level by humidifying the gas is highly required.

[0007] As one of the prior arts, Korean Patent Publication No. 10-2019-0138529 discloses a fuel cell membrane humidifier using a humidification system with hollow fiber membranes.

[0008] The aforementioned conventional fuel cell membrane humidifier includes a middle case in which a plurality of hollow fiber membranes are accommodated, a cap case coupled to the middle case, a potting part formed at the ends of the plurality of hollow fiber membranes, an assembly member disposed between the cap case and the end of the middle case and hermetically coupling them, and a protruding part extending from the inside of the cap case to the edge of the potting part to hermetically couple between the cap case and the potting part.

[0009] The fuel cell membrane humidifier is disclosed to be able to achieve an airtight function in a high-temperature / high-pressure / moist environment by configuring an assembly structure in which the assembly member is disposed between the cap case and the end of the middle case, and the protruding part extends from the inside of the cap case to the edge of the potting part between the cap case and the potting part.

[0010] However, in the conventional membrane humidifier described above, since the contact between the gas flowing in from the stack and the hollow fiber membrane is concentrated on the inflow portion side of the middle case, a dead zone is formed at the lower part of the middle case, and there is a problem that the humidification efficiency of the inflowing gas in the dead zone becomes poor and the overall humidification efficiency deteriorates.

[0011] On the other hand, in addition to the airtightness between the housing and the cartridge constituting the membrane humidifier, assemblability is a very important factor for improving the productivity and humidification efficiency for the manufacture of the membrane humidifier. Therefore, various research and developments have been attempted regarding this.

Prior Art Documents

Patent Documents

[0012]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0013] An object of the disclosed invention is to provide a fuel cell membrane humidifier in which high-humidity gas discharged from a stack of a hydrogen fuel cell forms a contact path throughout the upper, middle, and lower parts of a hollow fiber membrane module without a dead zone in a main housing, and sufficient humidification can be performed on the air supplied to the stack.

[0014] Another object of the disclosed invention is to provide a fuel cell membrane humidifier having a structure advantageous for airtightness and assemblability between a housing for a membrane humidifier and a cartridge for the purpose of productivity and humidification efficiency for the manufacture of the membrane humidifier.

Means for Solving the Problems

[0015] One feature of the invention according to the disclosed content is A flow-in section that forms an inlet for the humid gas discharged from the fuel cell, a flow-out section that forms an outlet for the gas, and at least one cartridge support portion formed inside the main body between the inlet section and the outlet section, and a main housing integrally formed therewith. It includes a hollow fiber membrane cartridge having at least one outer flange spaced apart from the outside of the cartridge housing corresponding to the cartridge support portion, a large number of hollow fiber membrane modules arranged inside the cartridge housing, and the flow-in section and the flow-out section are structurally isolated by the flange when assembled into the main housing. The hollow fiber membrane cartridge It includes an arrangement of an upstream distribution port, a midstream distribution port, and a downstream distribution port formed on one side wall of the cartridge housing, And an arrangement of an upstream discharge port, a midstream discharge port, and a downstream discharge port formed on the other side wall of the cartridge housing. The distribution ports are formed in a large number of multi-layer arrangements such that the opening area gradually increases from upstream to downstream. The discharge ports are formed in a large number of multi-layer arrangements such that the opening area gradually increases from downstream to upstream, providing a membrane humidifier.

[0016] Another feature of the invention according to an embodiment is that a middle seal is coupled to the outside of the outer flange of the cartridge, and the middle seal maintains airtightness with respect to the support portion of the main housing, providing a fuel cell membrane humidifier.

[0017] Another feature of the invention according to an embodiment is that a step seal is configured at both end portions of the hollow fiber membrane cartridge, and the step seal maintains airtightness between the cartridge, the outlet housing, and the inlet housing, providing a fuel cell membrane humidifier.

[0018] Another feature of the invention according to one embodiment provides a fuel cell membrane humidifier, wherein the arrangement of the distribution ports is configured to include through holes whose opening area increases as they are farther from the flow-in section.

[0019] Another feature of the invention according to one embodiment provides a fuel cell membrane humidifier, wherein the arrangement of the discharge ports is configured to include through holes whose opening area decreases as they are farther from the flow-out section.

[0020] Another feature of the invention according to one embodiment provides a fuel cell membrane humidifier, wherein the step seal is configured to include any one of a V-shaped seal, an O-ring, and a face seal.

[0021] Another feature of the invention according to one embodiment further includes a gasket installed at one end of the main housing, and the gasket provides airtightness with respect to the inlet housing.

[0022] Another feature of the invention according to one embodiment is further configured to include a gasket installed at the other end of the main housing, and the gasket provides airtightness with respect to the outlet housing, and provides a fuel cell membrane humidifier.

Advantages of the Invention

[0023] According to one embodiment disclosed herein, due to the distribution port and discharge port arrangement structures having different opening areas on the upstream side, middle stream side, and downstream side of the cartridge respectively, the humid gas circulates and flows inside the hollow fiber membrane module, thereby providing the advantage of maximizing the humidification efficiency without dead zones for the dry compressed air passing through the inside of the cartridge and the hollow fiber membrane.

[0024] Also, according to an embodiment disclosed in this specification, by forming a structural isolation state by the second outer flange of the cartridge, there is an advantage that the inflow flow of the humidified gas filled in the flow injection section and the discharge flow of the humidified gas formed in the flow out section are stably maintained.

[0025] Also, according to an embodiment disclosed in this specification, by constructing a structurally simple assembly element between the inlet housing and the outlet housing in addition to the cartridge body and the main housing, there is an advantage of maintaining firm airtightness after replacement and assembly.

[0026] Also, according to various embodiments disclosed in this specification, by eliminating the separately required secondary epoxy potting and drying processes when damage or A / S occurs in the cartridge or the hollow fiber membrane module (hollow fiber membrane filter), there is an advantage of providing the rapidity of replacement and assembly work and the economy of cost reduction.

[0027] Also, the effects of the present invention described as such are naturally exerted by the configuration of the described content regardless of whether the inventor is aware of them. Therefore, the above-described effects are only some effects according to the described content, and it should not be recognized that all the effects grasped or existing by the inventor are described.

[0028] Also, the effects of the present invention should be further grasped by the overall description of the specification. Even if it is not described in explicit words, as long as a person having ordinary knowledge in the technical field to which the described content belongs can recognize that there are such effects through this specification, it should be regarded as the effects described in this specification.

Brief Description of the Drawings

[0029]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0030] Hereinafter, with reference to the accompanying drawings, the configuration, operation, and effects of a fuel cell membrane humidifier according to a preferred embodiment will be described. For reference, in the following drawings, each component is omitted or schematically illustrated for convenience and clarity, and the size of each component does not reflect the actual size. Throughout the specification, the same reference numerals refer to the same components, and the drawing reference numerals for the same configuration in each individual drawing will be omitted.

[0031] FIG. 1 is a cross-sectional view of a fuel cell membrane humidifier according to an embodiment of the invention disclosed in this specification, FIG. 2 is an exploded perspective view showing the coupling relationship between a cartridge and a seal element according to an embodiment of the present invention, FIG. 3 is an operating state diagram of a fuel cell membrane humidifier according to an embodiment of the present invention, FIG. 4 is a Step portion detailed enlarged view showing the seal coupling state between a main housing, an inlet housing, and an outlet housing, FIG. 5 is a detailed Step as another embodiment enlarged view of the main part of the stepped portion seal shown in FIG. 4, and FIG. 6 is a detailed enlarged In the figure view showing an O-ring coupling structure according to another embodiment of the present invention.

[0032] A fuel cell membrane humidifier according to an embodiment of the present invention, in the assembly process, the main housing10 A hollow fiber membrane cartridge is inserted on the inner surface thereof 20 in a sliding manner and has an assembly structure in which flanges are seated on support portions provided inside the main housing 10 respectively.

[0033] More specifically, referring to FIGS. 1 and 2, the main housing 10 includes a flow-in section 3 that forms an inflow portion 1 of the humid gas discharged from the fuel cell, a flow-out section 4 that forms an outflow portion 2 of the humid gas, and at least one cartridge support portion 5 formed inside the space between the inflow portion 1 and the outflow portion 2. The inflow portion 1, the outflow portion 2, and the cartridge support portion 5 are integrally formed by molding. Main housing 10

[0034] The flow-in section 3 forms a flow space through which humid gas or water vapor having a high humidity and high pressure, which is usually formed in a hydrogen fuel cell, flows through the inflow portion 1.

[0035] The flow-out section 4 forms a flow space through which the humid air, after circulating inside the cartridge housing 20 described later and sufficiently contacting the hollow fiber membrane, flows outside the cartridge and is discharged.

[0036] The cartridge support portion 5 includes a first support portion 5a that bolt-fixes the upper portion of the cartridge housing 20, a second support portion 5b that is spaced apart from the first support portion 5a toward the central side in the longitudinal direction and restricts lateral movement of the cartridge housing 20 and a third support portion 5c that fits and fixes the lower portion of the cartridge housing 20.

[0037] The second support portion 5b Main housing includes a stepped structure protruding inside 10. The third support portion 5c is configured to insert a flange By the groove .

[0038] The lateral movement of the cartridge housing 20 described above can be interpreted as the force received by the cartridge housing 20 and the resulting minute movement depending on the fluid pressure applied to the cartridge housing 20 when the high-pressure humid gas flows into the flow-in section 3.

[0039] In addition, the lateral movement of the cartridge housing 20 described above can be interpreted as an external force applied to the cartridge housing 20 corresponding to the flow direction formed from the flow-in section 3 to the flow-out section 4 and the resulting minute movement when the support portions 5a, 5b, or 5c are not configured.

[0040] The inlet housing 30 is coupled to the flow-out section 4 side of the main housing 10 and guides the inflow of outside air that is relatively dry compared to the humid gas.

[0041] Normally, outside air supplied via a compressor is provided inside the inlet housing 30, and the outside air flows in in a high-temperature and dry state.

[0042] The Inlet housing 30 includes a cooler 31 installed therein and guides the outside air to the inside of the hollow fiber membrane module inside the cartridge.

[0043] The cooler 31 functions to maintain the outside air at a preset appropriate temperature, and at this time, the outside air remains in a dry state.

[0044] On the other hand, the outlet housing 40 is coupled to the flow-in section 3 side of the main housing 10 and includes an inlet 41 that guides the humid gas provided from the hydrogen fuel cell side and an outside air discharge portion 42 adjacent to the inlet 41.

[0045] The outside air discharge part 42 of the outlet housing 40 forms a path for supplying the humidified air that has passed through the membrane region of the hollow fiber membrane module and has been sufficiently humidified into the interior of the fuel cell stack.

[0046] On the other hand, referring to FIG. 2, a cartridge housing 20 according to an embodiment of the present invention has at least one outer flange 21 spaced apart outside the cartridge housing 20 corresponding to the cartridge support part 5 of the main housing 10 and a plurality of hollow fiber membrane modules are arranged inside the cartridge housing 20.

[0047] The main housing 10 During assembly into the main housing, the flange 21 structurally isolates the flow-in section 3 from the flow-out section 4.

[0048] Preferably, the outer flange 21 includes a first outer flange 21a constrained by the first support part 5a and a second outer flange 21b constrained by the second support part 5b during assembly.

[0049] The flow-in section 3 formed outside the cartridge housing 20 and the flow-out section 4 form a predetermined chamber that is structurally separated or blocked from each other by the second outer flange 21b constrained by the second support part 5b.

[0050] During the flow process of the humid air, the humid air in the flow-in section 3 is guided from one side of the second outer flange 21b and induced to the hollow fiber membrane side inside the cartridge housing 20.

[0051] On the other hand, the humid air in the flow-out section 4 is guided from the other side of the second outer flange 21b and induced to the outflow part 2 or the discharge part side.

[0052] The hollow fiber membrane cartridge according to the present invention includes a distribution port arrangement including an upstream distribution port 22a, a middle stream distribution port 22b, and a downstream distribution port 22c formed on one side wall of a cartridge housing 20 and a discharge port arrangement including an upstream discharge port 23a, a middle stream discharge port 23b, and a downstream discharge port 23c formed on the other side wall of the cartridge housing Column and 20 Column and and is configured to include the same.

[0053] The distribution ports 22a, 22b, and 22c are formed in a large number of multi-layer arrays such that the opening area gradually increases from upstream to downstream. For example, as shown in the figure, it is possible to have a structure of through holes with a gradually increasing number going toward the downstream distribution port 22c side compared to the upstream distribution port 22a.

[0054] The distribution port arrangement The column is includes through holes whose opening area becomes larger as it moves away from the flow-in section 3

[0055] Although not shown in the figure, as another modified embodiment, the upstream distribution port 22a, the middle stream distribution port 22b, and the downstream distribution port 22c may each have a through hole structure with a different opening area, and may have various geometric deformations including circular holes, triangular holes, or rectangular holes.

[0056] On the other hand, the discharge ports 23a, 23b, and 23c are formed in a large number of multi-layer arrays such that the opening area gradually increases from downstream to upstream. For example, as shown in the figure, it is possible to have a structure of through holes with a gradually increasing number going toward the upstream discharge port 23a side compared to the downstream discharge port 23c.

[0057] The discharge port arrangement The column is includes through holes whose opening area becomes smaller as it moves away from the flow-out section 4

[0058] ​​​Although not shown in the drawings, as another modified embodiment, the upstream discharge port 23a, the middle discharge port 23b, and the downstream discharge port 23c may each have a through-hole structure with different opening areas, and may have various geometric deformations including circular holes, triangular holes, or rectangular holes.

[0059] The hollow fiber membrane cartridge described above is configured to include a large number of through-holes 24 in the upper and lower portions of the cartridge housing 20 so as to communicate with the inside of the hollow fiber membrane.

[0060] On the other hand, according to an embodiment of the present invention, a middle seal 50 is coupled to the outside of the second outer flange 21b of the cartridge housing 20.

[0061] Preferably, the middle seal is coupled to the outside of the second outer flange of the cartridge, and the middle seal maintains airtightness with respect to the support portion of the main housing.

[0062] The second outer flange 21b to which the middle seal 50 is coupled maintains an airtight state that is structurally sufficiently separated from the flow-in section 20 formed outside the cartridge housing 3 and the flow-out section 4 during assembly.

[0063] Step seals 60 are formed at both end portions of the cartridge housing 20, and maintain airtightness between the outlet housing 40 and the inlet housing 30 during assembly.

[0064] The step seal 60 does not require separate epoxy potting and drying processes when the cartridge or the hollow fiber membrane module (hollow fiber filter) is damaged or an A / S occurs, and provides the rapidity of replacement and assembly work and the economy of cost reduction through simple seal assembly.

[0065] In more detail, the membrane humidifier of the present invention having the above-mentioned step seal 60 is configured, and by eliminating the complicated secondary potting and drying steps that were previously required for the replacement of the cartridge and hollow fiber membrane filter, the labor required for replacement is significantly reduced.

[0066] 4, the step seal 60 preferably includes a V-seal or a lip seal 60a and is configured at one connecting portion and the other connecting portion of the cartridge housing 20. As a result, airtightness is maintained between the inlet housing 30 and the outlet housing 40 assembled on both sides of the cartridge housing 20 without a separate potting and drying process.

[0067] According to another embodiment of the present invention, as shown in Figures 5 and 6, the step seal 60 can be modified into an O-ring 60b or face seal 60c type, and can be selectively configured as any of the above-mentioned V-seal (lip seal), O-ring and face seal depending on the sealing performance and required specifications.

[0068] Meanwhile, a gasket 70a is provided at one end of the main housing 10, and the gasket 70a is connected to the inlet housing 10. 30 Provides robust airtightness against

[0069] said main housing 10 A gasket 70b may be further configured at the other end of the outlet housing. In this case, the gasket 70b may be 40 Provides airtightness against

[0070] [Mode for carrying out the invention]

[0071] The working principle of the fuel cell membrane humidifier according to the present invention will now be described.

[0072] Referring to FIG. 3, the humid gas generated by the hydrogen fuel cell stack is supplied inside through the humid gas inlet hole 41 of the outlet housing 40.

[0073] The supplied humid gas is primarily filled into the space between the inside of the main housing 10 and the outer flange of the cartridge housing 20, for example, the flow-in section 3 of the main housing 10 formed outside the second outer flange 21b.

[0074] At this time, since a structural isolation state is formed by the second outer flange 21b of the cartridge housing 20, the inflow flow of the humid gas filled into the flow-in section 3 is stably maintained.

[0075] Normally, the humid gas supplied from the hydrogen fuel cell stack is provided as preset high-pressure water vapor, but the humid gas filled into the flow-in section 3 20 flows into the inside of the hollow fiber membrane module through the upstream distribution port 22a, the midstream distribution port 22b, and the downstream distribution port 22c sequentially provided on one side wall of the cartridge housing.

[0076] In this process, the supplied humid gas 20 enters the inside of the hollow fiber membrane module through the distribution ports arranged so as to have a gradually increasing opening area (for example, the diameter of the through hole) from the upstream side to the downstream side of the cartridge housing. Via 22a, 22b, 22c The entering humid gas forms a predetermined circulating air flow and vortex flow (refer to the spiral arrow in FIG. 3) among the upper, middle, and lower regions of the hollow fiber membrane inside the cartridge housing 20 and advances to the discharge port side.

[0077] Before Recording progress Finally, after passing through the hollow fiber membrane without dead zones on both sides as well as the upper and lower parts of the hollow fiber membrane inside the cartridge housing, the humid gas

[0078] the cartridge housing 20After reaching the flow-out section 4 through the discharge ports 23a, 23b, 23c arranged so as to have an opening area (for example, the diameter of the through-hole) that gradually increases from the downstream side to the upstream side, it advances through the outflow section 2.

[0079] In this process, the structural isolation state is formed by the second outer flange 21b of the cartridge housing 20 so that the discharge flow of the humidified gas formed in the flow-out section 4 is also stably maintained.

[0080] On the other hand, the dry outside air introduced from the inlet housing 30 side is sufficiently humidified without a dead zone while passing through the hollow fiber membrane in a state where the moisture of the humidified gas is filtered, and the air thus sufficiently humidified (meaning humidified compressed air) is provided to the hydrogen fuel cell through the outside air outflow section 42 of the outlet housing.

[0081] Thus, the fuel cell membrane humidifier according to the present invention forms a sufficient humidifying action without a dead zone with respect to the dry compressed air entering from the inlet housing by forming a uniform contact of the entire upper, middle, and lower arrangements of the hollow fiber membrane module with respect to the humidified gas, thereby achieving a maximized humidifying efficiency.

[0082] In the description of the present invention, in the process of the humid gas flow of the above-described circulating air flow or vortex flow, the moisture filtering action of the hollow fiber membrane (membrane region) is known, and thus a detailed description thereof is omitted.

[0083] The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modifications that can replace them at the time of this application. Accordingly, the embodiments described above should be understood to be exemplary in all respects and not limiting. The scope of the present invention is defined by the claims set forth below rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included within the scope of the present invention.

Industrial Applicability

[0084] The fuel cell membrane humidifier according to the present invention can maintain high humidification efficiency by allowing the high-humidity gas discharged from the stack of the hydrogen fuel cell to come into contact with the entire upper, middle, and lower parts of the hollow fiber membrane module without a dead zone, and is useful for improving the airtightness and assemblability between the main housing, the inlet housing, and the outlet housing that are coupled to the cartridge.

Claims

1. A main housing integrally formed with a flow-in section forming an inflow portion of the humid gas discharged from the fuel cell, a flow-out section forming an outflow portion of the gas, and at least one cartridge support portion formed inside the main body between the inflow portion and the outflow portion; A hollow fiber membrane cartridge including at least one outer flange spaced apart from the outside of the cartridge housing corresponding to the cartridge support portion, a plurality of hollow fiber membrane modules arranged inside the cartridge housing, and the flow-in section and the flow-out section being structurally isolated by the flange when assembled into the main housing; The hollow fiber membrane cartridge is An arrangement of an upstream distribution port, a midstream distribution port, and a downstream distribution port formed on a side wall of one side of the cartridge housing; An arrangement of an upstream discharge port, a midstream discharge port, and a downstream discharge port formed on a side wall of the other side of the cartridge housing; The distribution ports are formed in a plurality of multilayer arrangements such that the opening area gradually increases from upstream to downstream; The discharge ports are formed in a plurality of multilayer arrangements such that the opening area gradually increases from downstream to upstream. A fuel cell membrane humidifier characterized by this.

2. A middle seal is coupled to the outside of the outer flange of the cartridge, and the middle seal maintains airtightness with respect to the support portion of the main housing. The fuel cell membrane humidifier according to Claim 1.

3. A step portion seal is configured at both end portions of the hollow fiber membrane cartridge, and the step portion seal maintains airtightness between the cartridge, the outlet housing, and the inlet housing. The fuel cell membrane humidifier according to Claim 1.

4. The arrangement of the distribution ports is configured to include through holes with an opening area that increases as it is farther from the flow-in section. The fuel cell membrane humidifier according to Claim 1.

5. The arrangement of the discharge ports is configured to include through holes with an opening area that decreases as it is farther from the flow-out section. The fuel cell membrane humidifier according to Claim 1.

6. The step portion seal is configured to include any one of a V-shaped seal, an O-ring, and a face seal, and the fuel cell membrane humidifier according to claim 3.

7. It further includes a gasket installed at one end of the main housing, The gasket provides airtightness against the inlet housing, and the fuel cell membrane humidifier according to any one of claims 1 to 6.

8. It further includes a gasket installed at the other end of the main housing, and the gasket provides airtightness against the outlet housing, and the fuel cell membrane humidifier according to claim 7.

Images