Humidifier for fuel cell

Abstract

The present invention relates to a humidifier for a fuel cell, the humidifier including a humidification module configured to humidify a dry gas supplied from the outside using moisture discharged from a fuel cell stack, and a first cover coupled to one end of the humidification module, wherein the humidification module includes an intermediate housing open at both ends, at least one filter cartridge disposed inside the intermediate housing and including a plurality of hollow fiber membranes, and a first packing member airtightly coupled to one end of the humidification module by mechanical assembly such that the first cover is in fluid communication with only the hollow fiber membranes.

Description

Technical Field

[0001] This disclosure relates to a humidifier for a fuel cell configured to supply humidified gas to the fuel cell. Background Technology

[0002] Unlike conventional chemical batteries such as dry cell batteries or storage batteries, fuel cells have the advantage of being able to continuously generate electricity as long as hydrogen and oxygen are supplied, and fuel cells have the advantage of no heat loss, so the efficiency of fuel cells is about twice that of internal combustion engines.

[0003] Furthermore, fuel cells directly convert the chemical energy generated by combining hydrogen and oxygen into electrical energy, resulting in lower levels of pollutants emitted. Therefore, the advantages of fuel cells lie in their environmental friendliness and in reducing concerns about energy depletion due to increased energy consumption.

[0004] Based on the type of electrolyte used, such fuel cells can generally be classified as polymer electrolyte membrane fuel cells (PEMFC), phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), solid oxide fuel cells (SOFC), or alkaline fuel cells (AFC).

[0005] These fuel cells operate on essentially the same principle, but they differ from one another in the type of fuel used, operating temperature, catalyst, and electrolyte. Among these fuel cells, polymer electrolyte membrane fuel cells (PEMFCs) are known to be most advantageous for transportation systems and small stationary power generation devices because they operate at lower temperatures than other fuel cells and have a higher output density, which allows for miniaturization.

[0006] One of the most important factors in improving the performance of polymer electrolyte membrane fuel cells (PEMFCs) is maintaining moisture content by supplying a predetermined amount or more of moisture to the polymer electrolyte membrane or proton exchange membrane (PEM) of the membrane electrode assembly (MEA). This is because if the polymer electrolyte membrane or proton exchange membrane dries out, its power generation efficiency decreases rapidly.

[0007] 1) Bubble humidification method: water is filled into the pressure vessel and the target gas is allowed to pass through the diffuser to supply water; 2) Direct injection method: the amount of water required for the fuel cell reaction is calculated and water is supplied directly to the gas flow channel through a solenoid valve; and 3) Membrane humidification method: water is supplied to the gas phase fluidized bed using a polymer membrane. The above methods are used as methods for humidifying polymer electrolyte membranes or proton exchange membranes.

[0008] Among these methods, the advantage of membrane humidification, which uses a membrane configured to selectively transmit only water vapor contained in the exhaust gas to humidify the polymer electrolyte membrane or proton exchange membrane, is that it can reduce the weight and size of the humidifier.

[0009] When forming modules, hollow fiber membranes with a large permeation area per unit volume are suitable for use as selective permeation membranes in membrane humidification. In other words, when using hollow fiber membranes to manufacture membrane humidifiers, hollow fiber membranes with a large contact surface area can be highly integrated, thus enabling sufficient humidification of fuel cells even in small-capacity applications. Low-cost materials can be used, and moisture and heat, including those from the high-temperature exhaust gas discharged from the fuel cell, can be collected and reused by the humidifier.

[0010] Figure 1 This is a schematic exploded perspective view of a humidifier commonly used in fuel cells.

[0011] like Figure 1 As shown, a conventional membrane humidification humidifier 100 includes a humidification module 110 that exchanges moisture between air supplied from the outside and exhaust gas discharged from a fuel cell stack (not shown), and covers 120 respectively connected to both ends of the humidification module 110.

[0012] One of the covers 120 transmits externally supplied air to the humidification module 110, and the other cover transmits air humidified by the humidification module 110 to the fuel cell stack.

[0013] The humidification module 110 includes an intermediate housing 111 having an exhaust gas inlet 111a and an exhaust gas outlet 111b, and a plurality of hollow fiber membranes 112 within the intermediate housing 111. Both ends of a bundle of hollow fiber membranes 112 are encapsulated in rigid potting sections 113. Typically, each rigid potting section 113 is formed by curing a liquid polymer, such as liquid polyurethane resin, using a casting method.

[0014] Externally supplied air flows along the hollow portion of the hollow fiber membrane 112. Exhaust gas introduced into the intermediate shell 111 through exhaust gas inlet 111a contacts the outer surface of the hollow fiber membrane 112 and is then discharged from the intermediate shell 111 through exhaust gas outlet 111b. When the exhaust gas contacts the outer surface of the hollow fiber membrane 112, the moisture contained in the exhaust gas is transferred through the hollow fiber membrane 112 to humidify the air flowing along the hollow portion of the hollow fiber membrane 112.

[0015] Usually, such as Figure 1As shown, the rigid potting portion 113 at the end of the potted hollow fiber membrane 112 and the resin layer 114 located between the rigid potting portion 113 and the intermediate shell 111 isolate the inner space of the cover 120 from the inner space of the intermediate shell 111. Similar to the rigid potting portion 113, each resin layer 114 is typically formed by curing a liquid polymer, such as liquid polyurethane resin, using a casting method.

[0016] However, the productivity of the humidifier 100 is reduced because the casting process for forming the resin layer 114 requires a relatively long process time. Summary of the Invention

[0017] Technical issues

[0018] This disclosure was made in view of the above problems, and the purpose of this disclosure is to provide a humidifier for fuel cells that can prevent a decrease in the productivity of the humidifier due to the formation of a resin layer by a casting process.

[0019] Technical solution

[0020] To achieve the above objectives, this disclosure may include the following configurations.

[0021] The humidifier according to this disclosure may include: a humidification module configured to humidify externally supplied dry gas using moisture discharged from a fuel cell stack; and a first cover coupled to one end of the humidification module. The humidification module may include: an intermediate housing open at both ends; and at least one cartridge disposed within the intermediate housing, the cartridge comprising a plurality of hollow fiber membranes. The cartridge may include: an inner housing open at both ends, the inner housing configured to receive the hollow fiber membranes; and a first potting layer configured to pot one end of each hollow fiber membrane.

[0022] In a humidifier for a fuel cell according to a first embodiment of the present disclosure, the humidifier module may include: a first encapsulation member that is hermetically connected to one end of the humidifier module by mechanical assembly, such that a first cover can be in fluid communication only with a hollow fiber membrane; a first sealing portion configured to form a tight seal between the first encapsulation member and a first potting layer; and a first blocking portion connected to the first encapsulation member to limit the flow distance of the first sealing portion, wherein, based on the first encapsulation member, the first sealing portion may be disposed in at least one of a first outer space between the first encapsulation member and the first cover and an inner space disposed on the opposite side of the first outer space.

[0023] A humidifier for a fuel cell according to a second embodiment of the present disclosure may include: a first encapsulation member hermetically connected to one end of a humidification module via mechanical assembly, such that a first cover can be in fluid communication only with a hollow fiber membrane; and a first sealant configured to form a tight seal between the first encapsulation member and a filter cartridge in an inner space disposed on the intermediate housing side based on the first encapsulation member. The first encapsulation member may include: a first recess configured to receive the first sealant, a first blocking member disposed on one side of the first recess, and a first separating member disposed on the other side of the first recess, the first blocking member being able to protrude toward the inner space with a length greater than the length of the first recess, and the first sealant being located in the first recess, the first sealant being configured to form a tight seal between the first blocking member and a first potting layer.

[0024] Beneficial effects

[0025] According to this disclosure, the following effects can be achieved.

[0026] This disclosure is implemented by omitting the casting process that forms a tight seal between the inner space of the cover and the inner space of the intermediate shell. Therefore, this disclosure can improve productivity by reducing production process time.

[0027] In this disclosure, by omitting the casting process, gaps that may form around the filter cartridge can be tightly sealed, thereby increasing the tight sealing force required to prevent direct mixing of dry gas and moisture. Therefore, this disclosure can improve the stability of the humidification process for humidifying dry gas.

[0028] In this disclosure, the protruding structure is achieved using a sealant, thereby further ensuring a tight seal area. Therefore, this disclosure can further increase the tight seal force using a sealant. Attached Figure Description

[0029] Figure 1 This is a schematic exploded perspective view of a humidifier commonly used in fuel cells.

[0030] Figure 2 This is a schematic exploded perspective view of a humidifier for a fuel cell according to the present disclosure.

[0031] Figure 3 This illustrates a humidifier for a fuel cell according to the present disclosure. Figure 2 A schematic anatomical view taken from line II.

[0032] Figure 4 This illustrates a humidifier for a fuel cell according to the present disclosure. Figure 2 A schematic cross-sectional view taken from line II.

[0033] Figures 5 to 7 yes Figure 4 A schematic enlarged sectional view of part A.

[0034] Figure 8 It is along Figure 2 A partial side section view taken from line II.

[0035] Figure 9 It is shown Figure 4 A schematic enlarged sectional view of part A, used to explain the reinforcing member according to this disclosure.

[0036] Figure 10 This is a schematic exploded perspective view of an embodiment of a humidifier for a fuel cell according to the present disclosure, in which two filter cartridges are connected to an intermediate housing.

[0037] Figure 11 This is a schematic exploded perspective view of an embodiment of a humidifier for a fuel cell according to the present disclosure, in which three filter cartridges are connected to an intermediate housing.

[0038] Figure 12 This illustrates a humidifier for a fuel cell according to the present disclosure. Figure 2 A schematic anatomical view taken from line II.

[0039] Figure 13 This illustrates a humidifier for a fuel cell according to the present disclosure. Figure 2 A schematic cross-sectional view taken from line II.

[0040] Figure 14 yes Figure 11 A schematic enlarged sectional view of part B.

[0041] Figure 15 This is shown along the path before connecting the first encapsulation component, filter cartridge, and first sealant. Figure 2 A partial anatomical view taken from line II.

[0042] Figure 16 This is a schematic cross-sectional view showing the first encapsulation member in a humidifier for a fuel cell according to the present disclosure before it is attached to an intermediate housing.

[0043] Figure 17 and Figure 18 This is a schematic cross-sectional view showing the first encapsulation component connected to the filter cartridge.

[0044] Figure 19 This is a schematic exploded perspective view of an embodiment of a humidifier for a fuel cell according to the present disclosure, in which two filter cartridges are connected to an intermediate housing.

[0045] Figure 20This is a schematic exploded perspective view of an embodiment of a humidifier for a fuel cell according to the present disclosure, in which three filter cartridges are connected to an intermediate housing. Detailed Implementation

[0046] In the following, embodiments of a humidifier for a fuel cell according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0047] Reference Figures 2 to 4 , Figure 10 as well as Figure 11 The humidifier 1 for a fuel cell according to this disclosure is configured to humidify dry gas supplied from the outside using moisture discharged from a fuel cell stack (not shown). The dry gas can be fuel gas or air. The dry gas can be humidified by the moisture and then supplied to the fuel cell stack. The humidifier 1 for a fuel cell according to this disclosure includes a humidification module 2 configured to humidify the dry gas and a first cover 3 connected to one end of the humidification module 2. The humidification module 2 includes a filter cartridge 22 connected to a plurality of hollow fiber membranes 221, an intermediate housing 21 connected to the filter cartridge 22 and disposed between the filter cartridge 22 and the intermediate housing 21 to form a tight seal between the filter cartridge 22 and the intermediate housing 21. The first encapsulation member 23 can form a tight seal between the filter cartridge 22 and the intermediate housing 21 by coupling rather than by a casting process. Therefore, the first encapsulation member 23 can tightly seal the inner space IS of the first cover 3 and the inner space IS of the intermediate housing 21. Therefore, in the humidifier 1 for fuel cells according to this disclosure, the casting process, which requires a relatively long processing time, can be omitted, thereby increasing productivity by reducing the production process time.

[0048] The humidification module 2, the first cover 3, and the second cover 4 will be described in detail below with reference to the accompanying drawings.

[0049] Reference Figures 2 to 4 , Figure 10 as well as Figure 11 The humidification module 2 humidifies the externally supplied dry gas. The humidification module 2 can use moisture discharged from the fuel cell stack to humidify the externally supplied dry gas. A first cover 3 can be connected to one end of the humidification module 2. A second cover 4 can be connected to the other end of the humidification module 2. The first cover 3 can transfer dry gas to the humidification module 2. In this case, the second cover 4 can transfer the humidified dry gas in the humidification module 2 to the fuel cell stack. The first cover 3 can transfer moisture to the humidification module 2. In this case, after the dry gas is humidified in the humidification module 2, the second cover 4 can discharge the moisture to the outside.

[0050] The humidification module 2 may include a filter cartridge 22, an intermediate housing 21, and a first encapsulation component 23.

[0051] The filter cartridge 22 includes a plurality of hollow fiber membranes 221. The hollow fiber membranes 221 can be implemented as filter cartridges 22 for modularity. Therefore, the hollow fiber membranes 221 can be installed in the intermediate housing 21 by connecting the filter cartridge 22 to the intermediate housing 21. Thus, in the humidifier 1 for a fuel cell according to the present disclosure, the ease of installation, separation, and replacement of the hollow fiber membranes 221 can be improved. The filter cartridge 22 may include an inner housing 222 configured to accommodate the hollow fiber membranes 221. The hollow fiber membranes 221 can be disposed within the inner housing 222 for modularity. Each hollow fiber membrane 221 may include a polymer membrane made of polysulfone resin, polyethersulfone resin, sulfonated polysulfone resin, polyvinylidene fluoride (PVDF) resin, polyacrylonitrile (PAN) resin, polyimide resin, polyamide-imide resin, polyesterimide resin, or a mixture of two or more of the aforementioned materials.

[0052] The filter cartridge 22 may include a first potting layer 223 and a second potting layer 224. The ends of a plurality of hollow fiber membranes 221 are potted in the first potting layer 223 and the second potting layer 224, which close the opening of the inner housing 222. One end of each of the plurality of hollow fiber membranes 221 may be secured by the first potting layer 223, and the other end of each of the plurality of hollow fiber membranes 221 may be secured by the second potting layer 224. Each of the first potting layer 223 and the second potting layer 224 may be formed by curing a liquid polymer, such as liquid polyurethane resin, using a casting method. The first potting layer 223 and the second potting layer 224 can secure the ends of the plurality of hollow fiber membranes 221 to the inner housing 222.

[0053] The first potting layer 223 and the second potting layer 224 can be formed to not obstruct the hollow portions of the plurality of hollow fiber membranes 221. Therefore, dry gas or moisture supplied from the outside can be supplied to the hollow portions of the hollow fiber membranes 221 without interference from the first potting layer 223 and the second potting layer 224, and dry gas or moisture can be discharged from the hollow portions of the hollow fiber membranes 221 without interference from the first potting layer 223 and the second potting layer 224.

[0054] The filter cartridge 22 may include an inlet port (not shown) and an outlet port (not shown) formed in the inner housing 222. The inlet port allows humid or dry gas to be introduced into the inner housing 222. The inlet port may be formed through the inner housing 222. The outlet port allows humid or dry gas to be discharged from the inner housing 222 to the outside.

[0055] The filter cartridge 22 is connected to the intermediate housing 21. The intermediate housing 21 may include a receiving hole 211 configured to receive the filter cartridge 22 therein. The receiving hole 211 may be provided in the intermediate housing 21. The filter cartridge 22 may be inserted into the receiving hole 211 such that a space is defined between the inner surface of the intermediate housing 21 and the outer surface of the filter cartridge 22, thereby the filter cartridge may be disposed in the intermediate housing 21.

[0056] Inlet 212 and outlet 213 can be formed on one side of intermediate housing 21.

[0057] Inlet 212 allows humid or dry gas to be introduced into intermediate housing 21. Outlet 213 allows humid or dry gas to be discharged from intermediate housing 21. Inlet 212, outlet 213 and intermediate housing 21 can be integrally formed.

[0058] When humidified gas flows through inlet 212 and outlet 213, the humidified gas can be supplied through inlet 212 to the space between the inner surface of the intermediate shell 21 and the outer surface of the inner shell 222, and can also be supplied to the inner shell 222 through the inlet hole, and can contact the outer surface of the hollow fiber membrane 221. During this process, the moisture contained in the humidified gas can be transferred through the hollow fiber membrane 221, thereby humidifying the dry gas flowing along the hollow portion of the hollow fiber membrane 221. The humidified dry gas can be discharged from the hollow fiber membrane 221 and then supplied to the fuel cell stack through the second cover 4. After humidifying the dry gas, the humidified gas can be discharged through the outlet hole to the space between the outer surface of the inner shell 222 and the inner surface of the intermediate shell 21, and then discharged from the intermediate shell 21 through outlet 213. Inlet 212 can be connected to the fuel cell stack to receive humidified gas from the fuel cell stack. In this case, the humidified gas can be exhaust gas discharged from the fuel cell stack.

[0059] As the drying gas flows through inlet 212 and outlet 213, it can be supplied through inlet 212 to the space between the inner surface of the intermediate housing 21 and the outer surface of the inner housing 222, and through inlet holes to the inner housing 222, allowing it to contact the outer surface of the hollow fiber membrane 221. During this process, moisture contained in the dry gas can be transferred through the hollow fiber membrane 221, thereby humidifying the drying gas introduced into the inner housing 222. The humidified drying gas can be discharged through outlet holes to the space between the outer surface of the inner housing 222 and the inner surface of the intermediate housing 21, and through outlet 213 from the intermediate housing 21, and can be supplied to the fuel cell stack. After humidifying the drying gas, moisture can be discharged from the hollow fiber membrane 221 and then to the outside through the second cover 4. The first cover 3 can be connected to the fuel cell stack to receive moisture from the fuel cell stack. In this case, the moisture can be exhaust gas discharged from the fuel cell stack.

[0060] Reference Figures 2 to 20 The first encapsulation member 23 forms a tight seal between the filter cartridge 22 and the intermediate housing 21. The first encapsulation member 23 prevents direct mixing of dry gas and moisture. The first encapsulation member 23 can be disposed between the filter cartridge 22 and the intermediate housing 21. In this case, the filter cartridge 22 can be inserted into a first through-hole 231 formed in the first encapsulation member 23. The first encapsulation member 23 can be in close contact with the filter cartridge 22 to form a tight seal between the filter cartridge 22 and the intermediate housing 21. In this case, the size of the filter cartridge 22 can be formed larger than the size of the first through-hole 231. Therefore, the filter cartridge 22 can be inserted into the first through-hole 231 by an interference fit. The first encapsulation member 23 can be made of an elastically deformable material. For example, the first encapsulation member 23 can be made of rubber. The first encapsulation member 23 can be formed annularly to form a tight seal between the filter cartridge 22 and the intermediate housing 21. However, this disclosure is not limited thereto, and the first encapsulation member 23 can be formed in any other shape, as long as a tight seal can be formed between the filter cartridge 22 and the intermediate housing 21.

[0061] Here, the humidifier 1 for a fuel cell according to this disclosure may include various embodiments of a structure in which a tight seal is formed between the filter cartridge 22 and the intermediate housing 21. In the following, embodiments of the structure in which a tight seal is formed between the filter cartridge 22 and the intermediate housing 21 will be described in detail with reference to the accompanying drawings.

[0062] <Humidifier for fuel cell according to the first embodiment>

[0063] Reference Figures 2 to 11 The humidifier 1 for a fuel cell according to the first embodiment may include a first sealing part 240 and a first blocking part 260.

[0064] The first sealing portion 240 forms a tight seal between the first encapsulation member 23 and the first potting layer 223. Based on the first encapsulation member 23, the sealing portion 240 can be disposed in at least one of a first outer space OS between the first encapsulation member 23 and the first cover 3 and an inner space IS disposed on the opposite side of the first outer space OS.

[0065] For example, such as Figure 5 As shown, the first sealing portion 240 can be disposed in the first outer space OS to form a tight seal between the first encapsulation member 23 and the first potting layer 223. For example, as Figure 6 As shown, the first sealing portion 240 can be disposed in the inner space IS to form a tight seal between the encapsulation member 23 and the first potting layer 223. The first sealing portion 240 can be disposed in both the outer space OS and the inner space IS to form a tight seal between the first encapsulation member 23 and the first potting layer 223 in each of the outer space OS and the inner space IS.

[0066] Therefore, in the humidifier 1 for a fuel cell according to the first embodiment, the ease of manufacturing a tightly sealed structure between the first cover 3 and the first potting layer 223 can be improved, allowing the first cover 3 to be in fluid communication only with the hollow fiber membrane 221 through the assembly structure between the first encapsulation member 23 and the first potting layer 223. Furthermore, fluid can be prevented from moving through the first sealing portion 240 into the gap defined between the first encapsulation member 23 and the first potting layer 223, thereby improving the airtightness of the tightly sealed structure between the first cover 3 and the first potting layer 223. The sealing portion 240, made of a liquid resin selected from liquid polyurethane resin, liquid silicone resin, liquid epoxy resin, liquid elastomer resin, and combinations thereof, can be coated onto the first encapsulation member 23 and cured after the first encapsulation member 23 is disposed between the filter cartridge 22 and the intermediate housing 21 to form a tight seal between the first potting layer 223 and the first encapsulation member 23. After the first encapsulation member 23 is disposed between the filter cartridge 22 and the intermediate housing 21, the sealing portion 240 can be applied and cured to fill the gap between the first potting layer 223 and the first encapsulation member 23, thereby forming a tight seal between the filter cartridge 22 and the intermediate housing 21.

[0067] Reference Figure 5 and Figure 7 When the first sealing portion 240 is implemented as being disposed in the first outer space OS, the first sealing portion 240 may include a first outer sealant 24.

[0068] The first external sealant 24 forms a tight seal between the first potting layer 223 and the first encapsulation member 23 in the first outer space OS. The first external sealant 24 can form a tight seal between the first encapsulation member 23 and the first potting layer 223 in the outer space OS. Based on the first encapsulation member 23, the first external sealant 24 can be positioned facing the first outer space OS. When the filter cartridge 22 is inserted into the first through-hole 231, the first external sealant 24 can be applied to the gap defined between the first potting layer 223 and the first encapsulation member 23, and then cured. Therefore, the first external sealant 24 can tightly seal the gap defined between the first encapsulation member 23 and the first potting layer 223 in the first outer space OS, thereby preventing direct mixing of dry gas and moisture between the first encapsulation member 23 and the first potting layer 223. A first external sealant 24, made of a liquid resin selected from liquid polyurethane resin, liquid silicone resin, liquid epoxy resin, liquid elastomer resin, and combinations thereof, can be applied to the first encapsulation member 23 and cured after the first encapsulation member 23 is disposed between the filter cartridge 22 and the intermediate housing 21 to form a tight seal between the first potting layer 223 and the first encapsulation member 23 in the first outer space OS. After the first encapsulation member 23 is disposed between the filter cartridge 22 and the intermediate housing 21, the first external sealant 24 can also be applied and cured to fill the gap between the first potting layer 223 and the first encapsulation member 23, thereby forming a tight seal between the filter cartridge 22 and the intermediate housing 21.

[0069] Reference Figure 6 and Figure 7 When the first sealing portion 240 is implemented as being disposed in the inner space IS, the first sealing portion 240 may include a first inner sealant 25.

[0070] The first inner sealant 25 forms a tight seal between the first potting layer 223 and the first encapsulation member 23 in the inner space IS. Based on the first encapsulation member 23, the first inner sealant 25 forms a tight seal between the first encapsulation member 23 and the first potting layer 223 in the inner space IS located on the opposite side of the first outer space OS. Based on the first encapsulation member 23, the first inner sealant 25 can be positioned facing the interior of the intermediate housing 21. When the filter cartridge 22 is inserted into the first through-hole 231, the first inner sealant 25 can be applied to the gap defined between the first potting layer 223 and the first encapsulation member 23 and then cured. Therefore, the first inner sealant 25 can tightly seal the gap defined between the first encapsulation member 23 and the first potting layer 223 in the inner space IS, thereby preventing direct mixing of dry gas and moisture between the first encapsulation member 23 and the first potting layer 223. A first inner sealant 25, made of a liquid resin selected from liquid polyurethane resin, liquid silicone resin, liquid epoxy resin, liquid elastomer resin, and combinations thereof, can be applied to the first encapsulation member 23 and cured after the first encapsulation member 23 is disposed between the filter cartridge 22 and the intermediate housing 21 to form a tight seal between the filter cartridge 22 and the first encapsulation member 23 in the inner space IS. After the first encapsulation member 23 is disposed between the filter cartridge 22 and the intermediate housing 21, the first inner sealant 25 can also be applied and cured to fill the gap between the filter cartridge 22 and the intermediate housing 21, thereby forming a tight seal between the filter cartridge 22 and the intermediate housing 21.

[0071] Reference Figures 5 to 7 When the first sealing portion 240 is implemented to be disposed in both the first outer space OS and the inner space IS, the first sealing portion 240 may include both the first outer sealant 24 and the first inner sealant 25. Therefore, in the humidifier 1 for a fuel cell according to the first embodiment, the following effects can be achieved.

[0072] First, in the humidifier 1 for a fuel cell according to the first embodiment, a tight seal can be formed between the filter cartridge 22 and the intermediate housing 21 using the first encapsulation member 23. Additionally, a sealant can be used to form a tight seal between the first encapsulation member 23 and the first potting layer 223, thereby increasing the tight seal force between the first encapsulation member 23 and the filter cartridge 22.

[0073] Secondly, the first external sealant 24 can form a tight seal between the first encapsulation member 23 and the first potting layer 223 in the first outer space OS, and the first internal sealant 25 can form a tight seal between the first encapsulation member 23 and the first potting layer 223 in the inner space IS, thereby achieving a double tight seal structure through the sealants. Therefore, in the humidifier 1 for a fuel cell according to the first embodiment, the area of ​​the tight seal between the first encapsulation member 23 and the first potting layer 223 can be increased by the sealant, thereby further increasing the tight seal force between the first encapsulation member 23 and the filter cartridge 22.

[0074] Third, the first outer sealant 24 can prevent gas from entering the space between the first encapsulation member 23 and the first potting layer 223 from the first outer space OS, and the first inner sealant 25 can prevent gas from entering the space between the first encapsulation member 23 and the first potting layer 223 from the inner space IS. Therefore, it is possible to prevent gas from permeating into the space between the first encapsulation member 23 and the first potting layer 223, thus preventing force from being applied to the first encapsulation member 23 in the direction of separation from the first potting layer 223. Therefore, in the humidifier 1 for a fuel cell according to the first embodiment, it is possible to prevent a reduction in the force of the tight contact between the first encapsulation member 23 and the filter cartridge 22.

[0075] Fourth, since each of the first outer sealant 24 and the first inner sealant 25 is applied in a liquid state, a tight seal can be formed between the first encapsulation member 23 and the first potting layer 223, regardless of the shape or size of the gap between the first encapsulation member 23 and the first potting layer 223. Therefore, the responsiveness to the shape of the first encapsulation member 23 and the filter cartridge 22 can be improved when tightly sealing the first encapsulation member 23 and the filter cartridge 22.

[0076] Reference Figures 2 to 6 The humidification module 2 may include a first blocking part 260.

[0077] A first blocking portion 260 is coupled to the first encapsulation member 23 to limit the flow distance of the first seal portion 240. The first blocking portion 260 may be coupled to the first encapsulation member 23 and located on the opposite side of the first potting layer 223 based on the first seal portion 240. Therefore, the first blocking portion 260 can prevent the first seal portion 240 from being pressed by the first potting layer 223 during the process of the first seal portion being liquid-coated and cured, or can prevent the first seal portion 240 from moving away from the first potting layer 223 due to its weight, thereby preventing a reduction in the tight sealing force of the first seal portion 240.

[0078] Reference Figure 7The first blocking part 260 may include a first outer blocking part 26 and a first inner blocking part 27.

[0079] The first outer blocking portion 26 restricts the flow distance of the first outer sealant 24. The first outer blocking portion 26 can be coupled to the first encapsulation member 23. The first inner blocking portion 27 restricts the flow distance of the first inner sealant 25. The first inner blocking portion 27 can be coupled to the first encapsulation member 23. The first inner blocking portion 27 can be coupled to the first encapsulation member 23 at a position spaced apart from the first outer blocking portion 26. For example, the first outer blocking portion 26 can be coupled to the surface of the first encapsulation member 23 provided on the side facing the first cover 3, and the first inner blocking portion 27 can be coupled to the surface of the first encapsulation member 23 provided on the side facing the inner space IS. Multiple first inner blocking portions 27 can be provided. In this case, the first inner blocking portions 27 can be arranged to be spaced apart from each other in the first axial direction (X-axis direction).

[0080] The first encapsulation member 23 may include a first outer recess 232 configured to receive a first outer sealant 24 and a first inner recess 233 configured to receive a first inner sealant 25.

[0081] A first external recess 232 may be disposed between a first external barrier 26 and a first potting layer 223. A first external sealant 24 may be applied to the first external recess 232 to be contained within it, and then cured. Because it is contained within the first external recess 232, the first external sealant 24 can be located between the first external barrier 26 and the first potting layer 223. As described above, since the first external sealant 24 is applied along the first external recess 232 and then cured, a tight seal can be formed between the first encapsulation member 23 and the first potting layer 223. The first external barrier 26 can limit the flow distance of the first external sealant 24 contained within the first external recess 232. The first external barrier 26 may be coupled to the first encapsulation member 23 to protrude from it. Therefore, the flow of the first external sealant 24 contained within the first external recess 232 can be limited by the first external barrier 26.

[0082] A first recess 233 may be disposed between a first inner barrier 27 and a first potting layer 223. A first inner sealant 25 may be applied to the first recess 233 to be contained therein and then cured. Because it is contained in the first recess 233, the first inner sealant 25 can be located between the first inner barrier 27 and the first potting layer 223. Therefore, the first inner sealant 25 can be contained in the first recess 233 and cured, thereby forming a tight seal between the first encapsulation member 23 and the first potting layer 223. The first inner barrier 27 may limit the flow distance of the first inner sealant 25 contained in the first recess 233. The first inner barrier 27 may be coupled to the first encapsulation member 23 to protrude from the first encapsulation member 23. Therefore, the flow of the first inner sealant 25 contained in the first recess 233 can be limited by the first inner barrier 27.

[0083] Therefore, the following effects can be achieved in the humidifier 1 for a fuel cell according to the first embodiment.

[0084] First, the first external recess 232 can guide the path of the first external sealant 24 and the first internal recess 233 can guide the path of the first internal sealant 25, thereby improving the ease and accuracy of applying the first external sealant 24 and the first internal sealant 25.

[0085] Second, the first outer recess 232 and the first inner recess 233 can respectively accommodate the first outer sealant 24 and the first inner sealant 25, thereby restricting the flow of the first outer sealant 24 and the first inner sealant 25 when they deviate from their application positions until they are cured. Therefore, the degree of reduction in the percentage of sealant forming a tight seal between the first encapsulation member 23 and the first potting layer 223 due to the first outer sealant 24 and the first inner sealant 25 deviating from their application positions can be reduced. In the humidifier 1 for a fuel cell according to the first embodiment, the sealant can be used to further improve the accuracy of the tight seal, and the sealant can increase the sealant efficiency, thereby reducing the cost required for a tight seal using the sealant.

[0086] Each of the first outer recess 232 and the first inner recess 233 may be formed in a hemispherical shape. However, this disclosure is not limited thereto, and each of the first outer recess and the first inner recess may be formed in any other shape, as long as it can accommodate the first outer sealant 24 and the first inner sealant 25. Each of the first outer recess 232 and the first inner recess 233 may be formed in the shape of a closed curve along the interface between the first encapsulation member 23 and the first potting layer 223.

[0087] Reference Figures 2 to 4 as well as Figure 7 The first outer blocking portion 26 restricts the flow distance of the first outer sealant 24 contained in the first outer recess 232. The first outer blocking portion 26 can be coupled to the first encapsulation member 23 to protrude from the first encapsulation member 23. Therefore, the flow of the first outer sealant 24 contained in the first outer recess 232 can be restricted by the first outer blocking portion 26. In the humidifier 1 for a fuel cell according to the first embodiment, in addition to the first outer recess 232, the flow of the first outer sealant 24 can be restricted by the first outer blocking portion 26, thereby further improving the accuracy of sealant application and further improving the stability of the tight seal by the first outer sealant 24.

[0088] The first outer blocking portion 26 may include a first outer blocking member 261 and a first outer separating member 262.

[0089] The first outer barrier member 261 restricts the flow of the first outer sealant 24 contained in the first outer recess 232. The first outer barrier member may be formed to protrude from the first encapsulation member 23 toward the first outer space OS. The first outer barrier member 261 may be configured to surround the first outer recess 232. In this case, the first outer sealant 24 may be disposed between the first outer barrier member 261 and the first potting layer 223. Therefore, the flow of the first outer sealant 24 contained in the first outer recess 232 in the direction opposite to the direction toward the first potting layer 223 can be restricted.

[0090] The first outer partition member 262 reduces the amount of loss of the first outer sealant 24 present in the first outer space OS. The first outer partition member 262 can be formed to protrude from the first encapsulation member 23 toward the first potting layer 223. The flow of the first outer sealant 24 disposed in the first outer space OS to the inner space IS can be restricted by the first outer partition member 262. Therefore, the amount of loss of the first outer sealant 24 in the first outer space OS can be reduced. Therefore, in the humidifier 1 for a fuel cell according to the first embodiment, the amount of the first outer sealant 24 forming a tight seal between the first encapsulation member 23 and the first potting layer 223 in the first outer space OS can be increased, thereby further increasing the tight sealing force of the first outer sealant 24 in the first outer space OS.

[0091] Furthermore, when the first encapsulation member 23 is in close contact with the first potting layer 223, the first outer separator 262 can elastically press the first potting layer 223. Therefore, the sealing force between the first encapsulation member 23 and the first potting layer 223 can be further increased.

[0092] The first inner barrier 27 restricts the flow distance of the first inner sealant 25 contained in the first recess 233. The first inner barrier 27 may be coupled to the first encapsulation member 23 to protrude from the first encapsulation member 23. Thus, the flow of the first inner sealant 25 contained in the first recess 233 can be restricted by the first inner barrier 27.

[0093] In the humidifier 1 for a fuel cell according to the first embodiment, in addition to the first recess 233, the flow of the first inner sealant 25 can be restricted by the first inner blocking portion 27, thereby further improving the accuracy of sealant application and further improving the stability of tight sealing through the first inner sealant 25.

[0094] Reference Figures 2 to 4 as well as Figure 7 The first inner blocking part 27 may include an inner blocking member 271 and an inner separating member 272.

[0095] The inner barrier member 271 restricts the flow distance of the first inner sealant 25 contained in the first recess 233. The inner barrier member 271 may be formed to protrude from the first encapsulation member 23. The inner barrier member 271 may be configured to surround the first recess 233. In this case, the first inner sealant 25 may be disposed between the inner barrier member 271 and the first potting layer 223. Therefore, the flow of the first inner sealant 25 contained in the first recess 233 in the direction opposite to that toward the first potting layer 223 can be restricted.

[0096] The inner partition member 272 reduces the amount of loss of the first inner sealant 25 present in the inner space IS. The inner partition member 272 can be formed to protrude from the first encapsulation member 23 toward the first potting layer 223. The flow of the first inner sealant 25 disposed in the inner space IS to the first outer space OS can be restricted by the inner partition member 272. Therefore, the amount of loss of the first inner sealant 25 in the inner space IS can be reduced. Therefore, in the humidifier 1 for a fuel cell according to the first embodiment, the amount of the first inner sealant 25 forming a tight seal between the first encapsulation member 23 and the first potting layer 223 in the inner space IS can be increased, thereby further increasing the tight sealing force of the first inner sealant 25 in the inner space IS.

[0097] Reference Figure 7 and Figure 9The humidification module 2 may include a first pressure wing 28 connected to the first encapsulation member 23. The first pressure wing 28 may be formed to protrude from the first encapsulation member 23 toward the first potting layer 223. The first pressure wing 28 may be pressed by the first potting layer 223, thereby allowing the first pressure wing 28 to be elastically compressed. Since the first pressure wing 28 is disposed between the first encapsulation member 23 and the first potting layer 223, the flow of gas or liquid can be restricted to the gap between the first encapsulation member 23 and the first potting layer 223. Therefore, in the humidifier 1 for a fuel cell according to the first embodiment, in addition to the first outer sealant 24 and the first inner sealant 25, the first pressure wing 28 forms a tight seal between the first encapsulation member 23 and the first potting layer 223, thereby further increasing the force of the tight seal between the first encapsulation member 23 and the first potting layer 223.

[0098] The first pressure wing 28 can be made of an elastically deformable material. For example, the first pressure wing 28 can be made of rubber.

[0099] Reference Figures 7 to 9 The intermediate housing 21 may include a support recess 214 configured to allow at least a portion of one end of the first encapsulation member 23 to be inserted therein and to support the first encapsulation member. The first encapsulation member 23 may include a first engaging recess 235 configured to allow at least a portion of one end of the intermediate housing 21 to be inserted therein when the first encapsulation member is inserted into the support recess 214. At least a portion of the intermediate housing 21 is inserted into the first engaging recess 235, thereby establishing an engaging structure between the intermediate housing 21 and the first encapsulation member 23. For example, as... Figure 7 As shown, one of the inner protrusion 215 and the outer protrusion 216 of the intermediate housing 21, positioned closer to the inner space IS of the intermediate housing 21 (e.g., the inner protrusion 215), is inserted into the first engaging recess 235, thereby achieving an engaging structure between the intermediate housing 21 and the first encapsulation member 23. Specifically, a protrusion located at the edge of the first encapsulation member 23 can be inserted into a support recess 214, and one of the inner protrusion 215 and the outer protrusion 216 (e.g., the inner protrusion 215) can be inserted into the support recess 214. Therefore, movement of the first encapsulation member 23 and the intermediate housing 21 in the first axial direction (X-axis direction) can be restricted. Therefore, in the humidifier 1 for a fuel cell according to the first embodiment, the force of the connection between the first encapsulation member 23 and the intermediate housing 21 can be increased, thereby further increasing the force of a tight seal between the intermediate housing 21 and the filter cartridge 22 using the first encapsulation member 23.

[0100] The intermediate housing 21 may include a support member 217 configured to support the outer surface of the first encapsulation member 23. The support member 217 may be provided on a portion of an external protrusion 216 that contacts the outer surface of the first encapsulation member 23. When pressure is applied to the first encapsulation member 23 and its outer surface is supported by the support member 217, the first encapsulation member 23 may compress toward the intermediate housing 21 and come into close contact with it. Therefore, in the humidifier 1 for a fuel cell according to the first embodiment, the force of the connection between the first encapsulation member 23 and the intermediate housing 21 can be further increased, thereby using the first encapsulation member 23 to further increase the force of the tight seal between the intermediate housing 21 and the filter cartridge 22.

[0101] Reference Figure 9 The humidification module 2 may also include a reinforcing member 5 inserted into at least a portion of the first encapsulation member 23, the reinforcing member having a higher hardness than the first encapsulation member 23.

[0102] For example, the first encapsulation member 23 may have a first Shore A hardness of 10 to 100, and the reinforcing member may have a second hardness that is harder than the first hardness.

[0103] Reference Figure 10 The humidifier 1 for a fuel cell according to the first embodiment can be implemented such that a plurality of filter cartridges 22 are connected to an intermediate housing 21. In this case, the intermediate housing 21 may include a partition wall member (not shown) disposed between the filter cartridges 22 and 22'. With the partition wall member disposed between the filter cartridges, the filter cartridges 22 and 22' can be individually and detachably connected to the intermediate housing 21.

[0104] When multiple filter cartridges 22 are connected to the intermediate housing 21, the first encapsulation component 23 may include a first sub-encapsulation component 234.

[0105] A first sub-encapsulation component 234 is disposed between filter cartridges 22 and 22' to form a tight seal between filter cartridges 22 and 22'. The first sub-encapsulation component 234 can prevent direct mixing of dry gas and moisture between filter cartridges 22 and 22'.

[0106] The first sub-encapsulation member 234 can be in close contact with the filter cartridges 22 and 22' by the pressure of at least one of dry gas or moisture. Therefore, in the humidifier 1 for a fuel cell according to the first embodiment, the tight sealing force required to prevent direct mixing of dry gas and moisture between the filter cartridges 22 and 22' can be achieved without additional configuration, thereby reducing the cost required to increase the tight sealing force between the filter cartridges 22 and 22'. The first sub-encapsulation member 234 can be made of an elastically deformable material. For example, the first sub-encapsulation member 234 can be made of rubber.

[0107] Reference Figures 2 to 10 The second cover 4 is attached to the other end of the humidification module 2. The humidification module 2 may include a second encapsulation member 23' that is mechanically and hermetically attached to one end of the humidification module, allowing the second cover 4 to be in fluid communication only with the hollow fiber membrane. The space between the second cover 4 and the filter cartridge 22 may be tightly sealed by the second encapsulation member 23'. The second encapsulation member 23' is implemented to be approximately identical to the first encapsulation member 23. Therefore, its detailed description will be omitted.

[0108] The humidification module 2 may include a second sealing portion configured to form a tight seal between the second encapsulation member 23' and the second potting layer 224, a second blocking portion connected to the second encapsulation member 23', and a second pressure wing connected to the second encapsulation member 23'. The second sealing portion, the second blocking portion, and the second pressure wing are implemented to be approximately the same as the first sealing portion 240, the first blocking portion 260, and the first pressure wing 28. Therefore, a detailed description thereof will be omitted. When a plurality of filter cartridges 22 are connected to the intermediate housing 21, the second encapsulation member 23' may include a second sub-encapsulation member (not shown). The second sub-encapsulation member is also implemented to be approximately the same as the first sub-encapsulation member 234. Therefore, a detailed description thereof will be omitted.

[0109] at the same time, Figure 10 Two filter cartridges 22 are shown connected to the intermediate housing 21. However, this disclosure is not limited thereto, and the humidifier 1 for a fuel cell according to the first embodiment can be implemented such that three filter cartridges 22, 22', and 22" are connected to the intermediate housing 21, as shown. Figure 11 As shown. For this purpose, the first encapsulation member 23 may include two first sub-encapsulation members 234, and the second encapsulation member 23' may include two second sub-encapsulation members. Although not shown, the humidifier 1 for a fuel cell according to the first embodiment can be implemented such that four or more filter cartridges 22 are connected to the intermediate housing 21. In this case, the number of first sub-encapsulation members 234 and the number of second sub-encapsulation members can be increased to correspond to the number of filter cartridges 22 connected to the intermediate housing 21. For example, when the number of filter cartridges 22 is N, the number of first sub-encapsulation members 234 and the number of second sub-encapsulation members can be N-1.

[0110] <Humidifier for fuel cell according to the second embodiment>

[0111] Reference Figure 2 as well as Figures 12 to 18 According to the second embodiment, the humidifier 1 for a fuel cell can be implemented such that the humidification module 2 includes a first sealant 6.

[0112] Based on the first encapsulation member 23, the first sealant 6 forms a tight seal between the first encapsulation member 23 and the filter cartridge 22 within the inner space IS disposed on the side of the intermediate housing 21. The receiving hole 211 may be located within the inner space IS. The first sealant 6 can form a tight seal between the first encapsulation member 23 and the first potting layer 223, thereby forming a tight seal between the first encapsulation member 23 and the filter cartridge 22. This will be described in detail below.

[0113] First, a first sealant 6 is applied to the first encapsulation member 23. The first sealant 6 can be applied to the first encapsulation member 23 to surround the first through-hole 231.

[0114] Subsequently, the filter cartridge 22 is inserted into the first through-hole 231 of the first encapsulation member 23 coated with the first sealant 6. Therefore, the first sealant 6 can be located in the gap defined between the first potting layer 223 and the first encapsulation member 23. Thus, the first sealant 6 can tightly seal the gap defined between the first encapsulation member 23 and the first potting layer 223, thereby preventing direct mixing of dry gas and moisture between the first encapsulation member 23 and the first potting layer 223.

[0115] A first sealant 6, made of a liquid resin selected from liquid polyurethane resin, liquid silicone resin, liquid epoxy resin, liquid elastomer resin, and combinations thereof, can fill the gap defined between the first potting layer 223 and the first encapsulation member 23, and can then be cured to form a tight seal between the filter cartridge 22 and the first encapsulation member 23.

[0116] Therefore, the following effects can be achieved in the humidifier 1 for a fuel cell according to the second embodiment.

[0117] First, the gap between the first encapsulation component 23 and the first potting layer 223 can be tightly sealed by the first sealant 6, thereby increasing the tight seal force between the first encapsulation component 23 and the filter cartridge 22.

[0118] Second, since the first sealant 6 is applied in a liquid state, a tight seal can be formed between the first encapsulation member 23 and the first potting layer 223, regardless of the shape or size of the gap between the first encapsulation member 23 and the first potting layer 223. Therefore, when the first encapsulation member 23 and the filter cartridge 22 are tightly sealed, the responsiveness of the shape of the first encapsulation member 23 and the filter cartridge 22 can be improved.

[0119] Reference Figure 2 as well as Figures 12 to 18The first encapsulation component 23 may include a first encapsulation body 230 disposed between the first potting layer 223 and the intermediate housing 21, a first recess 233 configured to receive the first sealant 6, a first blocking member 236 disposed on one side of the first recess 233, and a first separating member 237 disposed on the other side of the first recess 233.

[0120] The first encapsulation body 230 defines the shape of the first encapsulation member 23. A first through-hole 231 can be formed through the first encapsulation body 230 in a direction perpendicular to the X-axis. The filter cartridge 22 can be accommodated in the first through-hole 231, so that the first encapsulation body 230 can be disposed between the intermediate housing 21 and the first potting layer 223. Between the intermediate housing 21 and the first potting layer 223, when the first encapsulation body 230 contacts each of the intermediate housing 21 and the first potting layer 223, the space between the first encapsulation body 230 and the first cover 3 can be isolated from the space between the first encapsulation body 230 and the intermediate housing 21.

[0121] A first recess 233 may be provided in the surface of the first encapsulation body 230 facing the intermediate housing 21. The first recess 233 may be formed to surround the first through-hole 231. A first sealant 6 may be applied to the first encapsulation member 23 to be accommodated in the first recess 233. Therefore, the first recess 233 can be used to guide the application path of the first sealant 6, thereby improving the ease of application of the first sealant 6, and can restrict the flow of the first sealant 6 until the first sealant is cured, thereby improving the application accuracy of the first sealant 6.

[0122] The first barrier member 236 restricts the flow distance of the first sealant 6 contained in the first recess 233. The first barrier member 236 may be disposed on one side of the first recess 233. The first barrier member 236 may be disposed on one side of the first recess 233 to surround the first recess 233. The first recess 233 may be disposed between the first barrier member 236 and the first potting layer 223. The first barrier member 236 may be formed to protrude from the first package body 230 toward the inner space IS. The first barrier member 236 may protrude toward the inner space IS with a length longer than the first recess 233. The first sealant may be located in the first recess 233 to form a tight seal between the first barrier member 236 and the first potting layer 223. Therefore, the flow of the first sealant 6 contained in the first recess 233 toward the first barrier member 236 can be restricted. Therefore, in the humidifier 1 for a fuel cell according to the second embodiment, in addition to the first recess 233, the flow of the first sealant 6 can be restricted by the first blocking member 236, thereby further improving the coating accuracy of the first sealant 6.

[0123] The first partition member 237 can be disposed on the other side of the first recess 233. Based on the first recess 233, the other side of the first recess 233 can be the opposite side of one side of the first recess 233. The first partition member 237 can be disposed on the other side of the first recess 233 to surround the first through-hole 231. Therefore, the first recess 233 can be located between the first blocking member 236 and the first partition member 237. The first partition member 237 can be formed to protrude from the first encapsulation body 230 toward the intermediate housing 21. Therefore, the flow of the first sealant 6 contained in the first recess 233 toward the first partition member 237 can be restricted.

[0124] The first sealant 6 may include a first sealant body 61 located in the first recess 233 and a first protruding sealant 62 protruding from the first sealant body 61 to form a tight seal between the first barrier member 236 and the first potting layer 223.

[0125] The first sealant body 61 forms a tight seal between the first encapsulation member 23 and the first potting layer 223 in the first recess 233. The first sealant body 61 may be formed by the application and containment of the first sealant 6 in the first recess 233. The first sealant body 61 may contact each of the first encapsulation member 23 and the first potting layer 223 in the first recess 233 to form a tight seal between the first encapsulation member 23 and the first potting layer 223.

[0126] The first protruding sealant 62 can protrude from the first sealant body 61 toward the inner space IS, thereby allowing the first protruding sealant to be disposed between the first barrier member 236 and the first potting layer 223. In this case, the first barrier member 236 can protrude toward the inner space IS with a length longer than the first recess 233. Therefore, the first barrier member 236 can be disposed on one side of the first protruding sealant 62, and the first potting layer 223 can be disposed on the other side of the first protruding sealant 62, thereby forming a tight seal between the first potting layer 223 and the first barrier member 236. "The other side" of the first protruding sealant 62 refers to the opposite side of one side of the first protruding sealant 62. Therefore, a tight seal can be formed between the first encapsulation member 23 and the first potting layer 223 by the first sealant body 61, and also by the first protruding sealant 62 by the first barrier member 236 and the first potting layer 223. Therefore, in the humidifier 1 for a fuel cell according to the second embodiment, the area of ​​tight sealing between the first encapsulation member 23 and the first potting layer 223 can be increased by the first sealant 6, thereby increasing the tight sealing force between the first encapsulation member 23 and the first potting layer 223.

[0127] Reference Figures 13 to 18 The first protruding sealant 62 can be formed by applying the first sealant 6 in a volume larger than the first recess 233 and pressing it against the first potting layer 223. This will be described in detail below.

[0128] First, such as Figure 16 As shown, when the first sealant 6 is applied in a volume larger than the first recess 233, a portion of the volume of the first sealant 6 that exceeds the first recess 233 protrudes from the first recess 233.

[0129] Subsequently, Figure 16 In the process, when the first encapsulation member 23 moves in the direction indicated by the arrow, the first sealant 6 is pressed by the first potting layer 223, thereby allowing the first protruding sealant 62 to be formed from the first sealant body 61, as shown. Figure 15 As shown.

[0130] Reference Figures 12 to 18 The first potting layer 223 may include a first pressing member 2231 projecting toward the first encapsulation member 23. The first pressing member 2231 presses against the first sealant 6. Figure 16 As shown, when the first encapsulation member 23 moves in the direction indicated by the arrow, the first sealant 6 can be pressed by the first pressing member 2231, thereby deforming the first sealant, as... Figure 17 As shown. In this case, the first sealant 6 may include a first receiving recess 63 configured to receive the first pressing member 2231 (as shown). Figure 15(As shown in the diagram). The first receiving recess 63 may be formed by pressing the first sealant 6 against the first pressing member 2231. The first sealant body 61 may include a first body contact member 611 configured to contact one side of the first pressing member 2231 received in the first receiving recess 63. The first sealant body 61 may form a tight seal between the first pressing member 2231 and the first encapsulation member 23 by means of the first body contact member 611 while being received in the first recess 233. One side of the first pressing member 2231 represents the side of the first pressing member 2231 facing the first recess 233. The first protruding sealant 62 may include a first protruding contact member 621 configured to contact the other side of the first pressing member 2231 received in the first recess 233. The first protruding sealant 62 can form a tight seal between the first protruding contact member 621 and the first blocking member 236 on the other side of the first pressing member 2231, thereby forming a tight seal between the first pressing member 2231 and the first encapsulation member 23, except for the first sealant body 61. The other side of the first pressing member 2231 refers to the side of the first pressing member 2231 facing the first blocking member 236. The angle between one side and the other side of the first pressing member 2231 can be a right angle. However, this disclosure is not limited to this, and the angle can be changed as long as one side of the first pressing member 2231 can contact the first sealant body 61 and the other side of the first pressing member 2231 can contact the first protruding sealant 62.

[0131] Reference Figure 17 and Figure 18 When the first separating member 237 is elastically compressed, the first pressing member 2231 can be inserted into the first recess 233. For example, when additional pressure is applied towards... Figure 17 When the first pressing member 2231 is applied to the first encapsulating member 23 in the direction of the first pressing member 2231, the first separating member 237 is elastically compressed, such as... Figure 18 As shown, the first pressing member 2231 can be inserted into the first recess 233 ( Figure 17 and Figure 18(The dotted line portion). Therefore, the first sealant body 61 contained in the first recess 233 can be pushed out of the first recess 233 by the volume of the first pressing member 2231 inserted into the first recess 233, thereby increasing the volume of the first protruding sealant 62. Therefore, the area of ​​the first protruding contact member 621 of the first protruding sealant 62 adjacent to the other side of the first pressing member 2231 can be increased. Therefore, in the humidifier 1 for a fuel cell according to the second embodiment, the area of ​​the tight seal between the first encapsulation member 23 and the first potting layer 223 can be increased by the first sealant 6, thereby further increasing the tight seal force between the first encapsulation member 23 and the filter cartridge 22.

[0132] Reference Figure 14 and Figure 15 The humidification module 2 may include a first pressure wing 28 connected to the first encapsulation member 23. The first pressure wing 28 may be formed to protrude from the first encapsulation member 23 toward the first potting layer 223. The first pressure wing 28 may be pressed by the first potting layer 223, thereby allowing the first pressure wing 28 to be elastically compressed. Since the first pressure wing 28 is in close contact with the first potting layer 223, the flow of gas or liquid can be restricted to the gap between the first encapsulation member 23 and the first potting layer 223. Therefore, in the humidifier 1 for a fuel cell according to the second embodiment, in addition to the first sealant 6, a tight seal can be formed between the first encapsulation member 23 and the first potting layer 223 by the first pressure wing 28, thereby further increasing the force of the tight seal between the first encapsulation member 23 and the first potting layer 223.

[0133] The first pressure wing 28 can be made of an elastically deformable material. For example, the first pressure wing 28 can be made of rubber.

[0134] Reference Figure 14 and Figure 16 The intermediate housing 21 may include a support recess 214 configured to allow at least a portion of one end of the first encapsulation member 23 to be inserted therein and to support the first encapsulation member. The first encapsulation member 23 may include a first engaging recess 235 configured to allow at least a portion of one end of the intermediate housing 21 to be inserted therein when the first encapsulation member is inserted into the support recess 214. At least a portion of the intermediate housing 21 is inserted into the first engaging recess 235, thereby establishing an engaging structure between the intermediate housing 21 and the first encapsulation member 23.

[0135] For example, such as Figure 14As shown, one of the inner protrusion 215 and the outer protrusion 216 of the intermediate housing 21, which is positioned closer to the inner space IS of the intermediate housing 21 (e.g., the inner protrusion 215), is inserted into the first engaging recess 235, thereby achieving an engaging structure between the intermediate housing 21 and the first encapsulation member 23. Specifically, a protrusion located at the edge of the first encapsulation member 23 can be inserted into the support recess 214, and one of the inner protrusion 215 and the outer protrusion 216 (e.g., the inner protrusion 215) can be inserted into the support recess 214. Therefore, the movement of the first encapsulation member 23 and the intermediate housing 21 in the first axial direction (X-axis direction) can be restricted. Therefore, in the humidifier 1 for a fuel cell according to the second embodiment, the force of the connection between the first encapsulation member 23 and the intermediate housing 21 can be increased, thereby using the first encapsulation member 23 to further increase the force of the tight seal between the intermediate housing 21 and the filter cartridge 22.

[0136] The intermediate housing 21 may include a support member 217 configured to support the outer surface of the first encapsulation member 23. The support member 217 may be provided on a portion of an external protrusion 216 that contacts the outer surface of the first encapsulation member 23. When pressure is applied to the first encapsulation member 23 and its outer surface is supported by the support member 217, the first encapsulation member 23 may compress toward the intermediate housing 21 and come into close contact with it. Therefore, in the humidifier 1 for a fuel cell according to the second embodiment, the force of the connection between the first encapsulation member 23 and the intermediate housing 21 can be further increased, thereby using the first encapsulation member 23 to further increase the force of the tight seal between the intermediate housing 21 and the filter cartridge 22.

[0137] Reference Figure 14 The humidification module 2 may further include a reinforcing member 5 inserted into at least a portion of the first encapsulation member 23. The reinforcing member 5 may be disposed within the first encapsulation body 230. The hardness of the reinforcing member 5 is higher than that of the first encapsulation member 23. For example, the first encapsulation member 23 may have a first Shore A hardness of 10 to 100, and the reinforcing member may have a second hardness harder than the first hardness. Therefore, the first encapsulation member 23 can be implemented with higher strength by means of the reinforcing member 5.

[0138] Reference Figure 19 According to the second embodiment, the humidifier 1 for a fuel cell can be implemented such that a plurality of filter cartridges 22 are connected to an intermediate housing 21. In this case, the intermediate housing 21 may include a partition wall member (not shown) disposed between the filter cartridges 22 and 22'. With the partition wall member disposed between the filter cartridges, the filter cartridges 22 and 22' can be individually and detachably connected to the intermediate housing 21.

[0139] When multiple filter cartridges 22 are connected to the intermediate housing 21, the first encapsulation component 23 may include a first sub-encapsulation component 234.

[0140] A first sub-encapsulation component 234 is disposed between filter cartridges 22 and 22' to form a tight seal between filter cartridges 22 and 22'. The first sub-encapsulation component 234 can prevent direct mixing of dry gas and moisture between filter cartridges 22 and 22'.

[0141] The first sub-encapsulation member 234 can be in close contact with the filter cartridges 22 and 22' by the pressure of at least one of dry gas or moisture. Therefore, in the humidifier 1 for a fuel cell according to the second embodiment, the tight sealing force required to prevent direct mixing of dry gas and moisture between the filter cartridges 22 and 22' can be achieved without additional configuration, thereby reducing the cost required to increase the tight sealing force between the filter cartridges 22 and 22'. The first sub-encapsulation member 234 can be made of an elastically deformable material. For example, the first sub-encapsulation member 234 can be made of rubber.

[0142] Reference Figure 2 as well as Figures 12 to 20 The second cover 4 is connected to the other end of the humidification module 2. The space between the second cover 4 and the filter cartridge 22 can be isolated from the space between the filter cartridge 22 and the intermediate housing 21 by the second encapsulation member 23', which is implemented to be approximately the same as the first encapsulation member 23. Therefore, its detailed description will be omitted.

[0143] The humidification module 2 may include a second sealant 6' configured to form a tight seal between the second encapsulation member 23' and the filter cartridge 22. Figure 13 (as shown in the diagram), and a second pressure wing (not shown) connected to the second encapsulation member 23'. The second sealant 6' and the second pressure wing are implemented to be approximately the same as the first sealant 6 and the first pressure wing 28. Therefore, their detailed description will be omitted.

[0144] When multiple filter cartridges 22 are connected to the intermediate housing 21, the second encapsulation member 23' may include a second sub-encapsulation member (not shown). The second sub-encapsulation member is also implemented to be approximately identical to the first sub-encapsulation member 234. Therefore, its detailed description will be omitted. Meanwhile, Figure 19 Two filter cartridges 22 are shown connected to the intermediate housing 21. However, this disclosure is not limited thereto, and the humidifier 1 for a fuel cell according to the second embodiment can be implemented such that three filter cartridges 22, 22', and 22" are connected to the intermediate housing 21, as shown. Figure 20As shown. For this purpose, the first encapsulation member 23 may include two first sub-encapsulation members 234, and the second encapsulation member 23' may include two second sub-encapsulation members. Although not shown, the humidifier 1 for a fuel cell according to the second embodiment can be implemented such that four or more filter cartridges 22 are connected to the intermediate housing 21. In this case, the number of first sub-encapsulation members 234 and the number of second sub-encapsulation members can be increased to correspond to the number of filter cartridges 22 connected to the intermediate housing 21. For example, when the number of filter cartridges 22 is N, the number of first sub-encapsulation members 234 and the number of second sub-encapsulation members can be N-1.

[0145] The present disclosure is not limited to the above embodiments and drawings, and it will be apparent to those skilled in the art that various substitutions, modifications and alterations can be made without departing from the technical concept of the present disclosure.

Claims

1. A humidifier for a fuel cell, the humidifier comprising: A humidification module configured to humidify externally supplied dry gas using moisture discharged from the fuel cell stack; as well as The first cover is connected to one end of the humidification module. in: The humidification module includes: An intermediate housing, the intermediate housing being open at both ends; and At least one filter cartridge, disposed within the intermediate housing, the filter cartridge comprising a plurality of hollow fiber membranes. The filter cartridge includes: An inner housing, open at both ends, configured to accommodate the hollow fiber membrane; and A first potting layer is configured to pot one end of each of the hollow fiber membranes. The humidification module includes: The first packaging component is mechanically and hermetically connected to one end of the humidification module, so that the first cover can be in fluid communication only with the hollow fiber membrane. A first sealing portion, configured to form a tight seal between the first encapsulation member and the first potting layer; and A first blocking portion, connected to the first encapsulation member to limit the flow distance of the first seal, and Based on the first packaging member, the first sealing portion is disposed in at least one of a first outer space between the first packaging member and the first cover and an inner space disposed on the opposite side of the first outer space. The first sealing portion includes a first internal sealant disposed within the internal space. The first blocking portion includes a first inner blocking portion connected to the first encapsulation member to limit the flow distance of the first inner sealant, and The first inner sealant is contained in a first recess disposed between the first inner barrier and the first potting layer, and the first inner sealant is configured to form a tight seal between the first encapsulation member and the first potting layer.

2. The humidifier according to claim 1, wherein: The first sealing portion includes a first external sealant disposed in the first external space. The first blocking portion includes a first outer blocking portion coupled to the first encapsulation member to limit the flow distance of the first outer sealant, and The first external sealant is contained in a first external recess disposed between the first external barrier and the first potting layer, and the first external sealant is configured to form a tight seal between the first encapsulation member and the first potting layer.

3. The humidifier according to claim 2, wherein, The first outer barrier portion includes a first outer barrier member protruding from the first encapsulation member toward the first outer space and a first outer separator member protruding from the first encapsulation member toward the first potting layer.

4. A humidifier for a fuel cell, the humidifier comprising: A humidification module configured to humidify externally supplied dry gas using moisture discharged from the fuel cell stack; as well as The first cover is connected to one end of the humidification module. in: The humidification module includes: An intermediate housing, with open ends; At least one filter cartridge, the at least one filter cartridge being disposed in the intermediate housing, the filter cartridge comprising a plurality of hollow fiber membranes; A first encapsulation component, which is mechanically and hermetically connected to one end of the humidification module, allows the first cover to be in fluid communication only with the hollow fiber membrane; and A first sealant is configured to form a tight seal between the first encapsulation member and the filter cartridge within an inner space disposed on the side of the intermediate housing, based on the first encapsulation member. The filter cartridge includes an inner shell configured to receive the hollow fiber membranes, both ends of which are open, and a first sealing layer configured to seal one end of each hollow fiber membrane. The first encapsulation member includes a first recess configured to receive the first sealant, a first blocking member disposed on one side of the first recess, and a first separating member disposed on the other side of the first recess. The first blocking member protrudes toward the inner space by a length greater than that of the first recess, and The first sealant is located in the first recess and is configured to form a tight seal between the first barrier member and the first potting layer. The first sealant includes a first sealant body disposed in the first recess and a first protruding sealant protruding from the first sealant body, the first protruding sealant being configured to form a tight seal between the first barrier member and the first potting layer.

5. The humidifier according to claim 4, wherein, The first protruding sealant is formed by applying the first sealant in a volume larger than the first recess and pressing it against the first potting layer.

6. The humidifier according to claim 4, wherein: The first potting layer includes a first pressing member protruding toward the first encapsulation member. The first sealant includes a first receiving recess configured to receive the first pressing member. The first sealant body includes a first body contact member configured to contact one side of the first pressing member accommodated in the first receiving recess, and The first protruding sealant includes a first protruding contact member configured to contact the other side of the first pressing member accommodated in the first receiving recess.

7. The humidifier according to claim 6, wherein, When the first separating member is elastically compressed, the first pressing member is inserted into the first recess.

8. The humidifier according to claim 1 or 4, wherein: The first pressure wing is attached to the first encapsulation member, and The first pressure wing protrudes from the first encapsulation member toward the first potting layer, and is elastically compressed when pressed by the first potting layer.

9. The humidifier according to claim 1 or 4, wherein: The intermediate housing includes a support recess configured to allow at least a portion of one end of the first encapsulation member to be inserted therein, and The first encapsulation member includes a first engagement recess configured to allow at least a portion of one end of the intermediate housing to be inserted therein.

10. The humidifier according to claim 9, wherein, The intermediate housing includes a support member configured to support the outer surface of the first encapsulation member.

11. The humidifier according to claim 1 or 4, wherein, The humidification module further includes a first reinforcing member inserted into at least a portion of the first encapsulation member, the first reinforcing member having a higher hardness than the first encapsulation member.

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