Dehumidifier, manufacturing method of dehumidifier and electric control equipment

Abstract

To provide a dehumidifier, a manufacturing method of dehumidifier and electric control equipment which prevent nitrite ion as a factor causing nitroso from depositing to an electrolyte membrane to suppress deterioration of dehumidification power.SOLUTION: A dehumidifier includes: a dehumidifying membrane 50 in which a cathode porous electrode 1 to which a cathode side catalytic layer 2 is applied, a solid polymer electrolyte membrane 3, an anode porous electrode 4 are laminated, and an anode side catalyst 5 is applied onto the anode porous electrode 4; a cathode side power supply body 6 which has an opening part opening to the cathode side surface of the dehumidifying membrane 50 and is connected with the cathode porous electrode 1; an anode side power supply body 7 which has an opening part opening to the anode side surface of the dehumidifying membrane 50 and is connected with the anode porous electrode 4; and a cationic porous body 10 which covers an opening part 7a of the anode side power supply body 7 to allow moisture to penetrate therethrough and block the transmission of pollutant gas.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a dehumidifier, a method for manufacturing a dehumidifier, and an electrical control device. [Background technology]

[0002] Dehumidifiers that utilize the electrolysis reaction of water use a structure in which a solid polymer electrolyte membrane and electrodes are stacked, and function as a dehumidifier by applying voltage to the electrodes via an external power source.

[0003] In conventional dehumidifiers that utilize the electrolysis reaction of water, when a voltage is applied to the anode and cathode from an external power source, the moisture contained in the dehumidification space is electrolyzed at the anode, and the generated hydrogen ions move from the anode through a solid polymer electrolyte membrane to the cathode, where they consume oxygen contained in the humidification space to generate water.

[0004] If a dehumidifier is installed so that gas does not flow in or out between the dehumidifying space facing the anode and the humidifying space facing the cathode, the moisture content in the dehumidifying space facing the anode decreases and the moisture content in the humidifying space facing the cathode increases, thereby enabling dehumidification of the dehumidifying space facing the anode (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2004-351316 A Summary of the Invention [Problem to be solved by the invention]

[0006] Adherence of contaminants to the electrode surface and electrolyte membrane surface of a dehumidifier can reduce dehumidification capacity. It has been found that not only a single type of contaminant can reduce dehumidification capacity, but also two or more types of contaminants can react together, resulting in a product that reduces dehumidification capacity. In particular, in buildings in salt-damaged regions, lithium nitrite is often included in the anti-corrosion components of reinforced concrete. Concomitant adhesion of amine compounds in the environment can also reduce dehumidification capacity. Nitrite and amine compounds adhere to the electrolyte membrane surface, and the acid catalytic ability of the electrolyte membrane triggers a nitrosation reaction, generating non-volatile nitroso compounds, which reduces dehumidification capacity.

[0007] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a dehumidifier, a method for manufacturing a dehumidifier, and an electrical control device that suppress the adhesion of nitrite ions, which are a cause of nitrosation reactions, to an electrolyte membrane and suppress a decrease in dehumidifying capacity. [Means for solving the problem]

[0008] The dehumidifier according to the present disclosure is characterized by comprising: a dehumidifying membrane formed by laminating a cathode porous electrode coated with a cathode-side catalyst layer, a solid polymer electrolyte membrane, and an anode porous electrode, with an anode-side catalyst layer coated on the surface of the anode porous electrode; a cathode-side current collector having an opening facing the cathode-side surface of the dehumidifying membrane and electrically connected to the cathode porous electrode; an anode-side current collector having an opening facing the anode-side surface of the dehumidifying membrane and electrically connected to the anode porous electrode; and a cationic porous body covering the opening of the anode-side current collector, which is permeable to moisture and adsorbs and removes pollutant gases.

[0009] A method for manufacturing a dehumidifier according to the present disclosure is characterized by comprising the steps of: applying a cathode-side catalyst layer to the surface of a cathode porous electrode; stacking the cathode porous electrode coated with the cathode-side catalyst layer, a solid polymer electrolyte membrane, and an anode porous electrode; and applying an anode-side catalyst layer to the surface of the anode porous electrode to form a dehumidifying membrane; electrically connecting a cathode-side power supplier having an opening that opens facing the cathode-side surface of the dehumidifying membrane to the cathode porous electrode; electrically connecting an anode-side power supplier having an opening that opens facing the anode-side surface of the dehumidifying membrane to the anode porous electrode; and providing a cationic porous body that is permeable to moisture but blocks permeation of pollutant gases so as to cover the opening of the anode-side power supplier.

[0010] An electrical control device according to the present disclosure is characterized by including the above-described dehumidifier. [Effects of the Invention]

[0011] According to the present disclosure, adhesion of nitrite ions to an electrolyte membrane can be suppressed, and a decrease in the dehumidifying capacity of a dehumidifier can be suppressed even in salt damage areas. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a cross-sectional view showing the configuration of a dehumidifier according to a first embodiment. [Figure 2] FIG. 3 is a cross-sectional view for explaining the operation of the dehumidifier according to the first embodiment in comparison with a comparative example. [Figure 3] FIG. 3 is a diagram for explaining a method for manufacturing the dehumidifier according to the first embodiment. [Figure 4] FIG. 10 is a cross-sectional view showing the configuration of a dehumidifier according to a second embodiment. [Figure 5] FIG. 10 is a cross-sectional view showing the configuration of a dehumidifier according to a third embodiment. [Figure 6] FIG. 10 is a cross-sectional view showing the configuration of a dehumidifier according to a fourth embodiment. [Figure 7] FIG. 10 is a cross-sectional view showing the configuration of a dehumidifier according to a fifth embodiment. [Figure 8] 10 is a diagram for explaining a method for manufacturing a dehumidifier according to a fifth embodiment. FIG. [Figure 9] FIG. 10 is a cross-sectional view showing the configuration of a dehumidifier according to a sixth embodiment. [Figure 10] FIG. 11 is a cross-sectional view showing the configuration of a dehumidifier according to a seventh embodiment. [Figure 11] FIG. 13 is a cross-sectional view showing the configuration of a dehumidifier according to an eighth embodiment. [Figure 12] FIG. 13 is a cross-sectional view of a further example of a dehumidifier according to the eighth embodiment. [Figure 13] FIG. 13 is a cross-sectional view of a further example of a dehumidifier according to the eighth embodiment. [Figure 14] FIG. 2 is a cross-sectional view of a dehumidifier of a comparative example used in a performance comparison test. [Figure 15] FIG. 1 is a diagram illustrating a test environment for a performance comparison test. [Figure 16] FIG. 1 is a diagram showing the specifications of the dehumidifier used in the performance comparison test. [Figure 17] FIG. 10 is a diagram showing the results of a performance comparison test. [Figure 18] FIG. 13 is a cross-sectional view showing a mounting method for a dehumidifier according to a ninth embodiment. [Figure 19] FIG. 13 is a cross-sectional view showing a mounting method for a dehumidifier according to a ninth embodiment. [Figure 20] FIG. 20 is a cross-sectional view showing the configuration of a dehumidifier according to a tenth embodiment. [Figure 21] FIG. 20 is a cross-sectional view showing the configuration of a dehumidifier according to an eleventh embodiment. [Figure 22] FIG. 20 is an exploded perspective view showing the configuration of a dehumidifier according to an eleventh embodiment. [Figure 23] FIG. 23 is a cross-sectional view of a further example of a dehumidifier according to the eleventh embodiment. [Figure 24] FIG. 23 is a cross-sectional view showing the configuration of a dehumidifier according to a twelfth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A dehumidifier according to an embodiment of the present disclosure will now be described in detail with reference to the drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

[0014] Embodiment 1 Fig. 1 is a cross-sectional view showing the configuration of a dehumidifier according to embodiment 1. As shown in Fig. 1, the dehumidifying membrane 50 is formed by laminating a cathode porous electrode 1 coated with a cathode-side catalyst layer 2, a solid polymer electrolyte membrane 3, and an anode porous electrode 4, and by coating an anode-side catalyst layer 5 on the surface of the anode porous electrode 4.

[0015] The cathode-side current collector 6 is electrically connected to the cathode porous electrode 1, and the anode-side current collector 7 is electrically connected to the anode porous electrode 4. By electrically connecting an external power source 8 to the anode-side current collector 7 and the cathode-side current collector 6 via a conductor 9, a voltage is applied to the anode porous electrode 4 and the cathode porous electrode 1, causing a reaction (Equation 1) in the anode-side catalyst layer 5 and a reaction (Equation 2) in the cathode-side catalyst layer 2.

[0016] 2H2O → O2+ 4H + + 4e - ...(Formula 1) O2+ 4H + + 4e - → 2H2O...(Formula 2)

[0017] These reactions of (Equation 1) and (Equation 2) reduce the moisture 500 in the dehumidification space 300 and increase the moisture in the humidification space 400, thereby dehumidifying the dehumidification space 300. In this specification, the moisture in the space refers to the moisture in the air within the space. However, the moisture 500 in the dehumidification space 300 may include water condensed on the anode side of the dehumidifier.

[0018] The dehumidifier 100 has a cationic porous body 10, an anode-side current collector 7, a dehumidifying membrane 50, and a cathode-side current collector 6, the outer peripheries of which are sandwiched between an anode-side frame 11 and a cathode-side frame 12, and the anode-side frame 11 and the cathode-side frame 12 are fixed together with screws 13. The cationic porous body 10 is disposed at a position separating the anode-side catalyst layer 5 from the dehumidifying space 300.

[0019] The anode side current collector 7 and the anode side frame 11 have an anode side current collector opening 7a and an anode side frame opening 11a that open opposite the anode side surface of the dehumidifying membrane 50. The cationic porous body 10 covers the anode side current collector opening 7a of the anode side current collector 7. Therefore, gas in the dehumidifying space 300 passes through the anode side frame opening 11a of the anode side frame 11, permeates the cationic porous body 10, passes through the anode side current collector opening 7a, and comes into contact with the anode side surface 50a of the dehumidifying membrane 50.

[0020] The cathode side current collector 6 and the cathode side frame 12 have a cathode side current collector opening 6a and a cathode side frame opening 12a that open opposite the cathode side surface of the dehumidifying membrane 50. The gas in the humidifying space 400 passes through the cathode side frame opening 12a of the cathode side frame 12 and the cathode side current collector opening 6a of the cathode side current collector 6, and comes into contact with the cathode side surface 50b of the dehumidifying membrane 50.

[0021] Next, the dehumidifier 100 according to the first embodiment will be described in detail. Moisture 500 and pollutant gas 600 exist in the dehumidification space 300. The cationic porous body 10 allows the moisture 500 to permeate from the dehumidification space 300 to the anode-side catalyst layer 5, while preventing the pollutant gas 600 from permeating.

[0022] The anode porous electrode 4 is made of a metal mesh such as titanium plated with a precious metal such as platinum, and transfers electrons from the anode-side catalyst layer 5, where the reaction of Equation 1 occurs, to the external power source 8. The precious metal plating on the anode porous electrode 4 prevents the anode porous electrode 4 from being oxidized by oxygen generated near the anode porous electrode 4. The anode porous electrode 4 has a mesh-like porous shape, which allows moisture 500 in the dehumidification space 300 that has passed through the cationic porous body 10 to come into contact with the solid polymer electrolyte membrane 3, and also allows the catalyst of the anode-side catalyst layer 5 to be supported around the anode porous electrode 4. The anode-side catalyst layer 5 activates the reaction of Equation 1 and prevents oxygen atoms generated by water decomposition from bonding to form ozone.

[0023] The solid polymer electrolyte membrane 3 allows the hydrogen ions generated by the reaction of formula (1) to pass through to the cathode porous electrode 1. The cathode porous electrode 1 is a carbon sheet made by laminating carbon fibers and molding them into a sheet, and transmits electrons from an external power source 8 to the cathode-side catalyst layer 2, which is the region where the reaction of formula (2) occurs. The cathode porous electrode 1 has a porous shape, which allows moisture 500 from the solid polymer electrolyte membrane 3 to be discharged to the humidification space 400, and also allows the catalyst of the cathode-side catalyst layer 2 to be supported around the cathode porous electrode 1. The cathode-side catalyst layer 2 activates the reaction of formula (2) and also prevents the hydrogen ions from converting into hydrogen molecules.

[0024] When dehumidifying the inside of a control panel, the space inside the control panel becomes the dehumidifying space 300, and the space outside the control panel becomes the humidifying space 400. Therefore, the dehumidifier 100 is installed so that the cationic porous body 10 contacts the space inside the control panel, and further so that the cathode side of the dehumidifying membrane 50 contacts the space outside the control panel.

[0025] Next, we will explain the deterioration of dehumidification capacity due to polluted gas 600 and the effects of the dehumidifier 100 according to the first embodiment. When a conventional dehumidifier is used continuously, catalyst particles aggregate, reducing the surface area of ​​the catalyst, and gradually reducing the dehumidification capacity. The rate at which the dehumidification capacity decreases depends on the type of dehumidifier and the exposure conditions, but it typically takes about five years for the dehumidification capacity to decrease to half of its initial performance when operated at room temperature. Furthermore, the rate at which the dehumidification capacity decreases varies greatly depending on the installation environment. If the dehumidifier is used in a high or low temperature environment outside the product warranty range, or in an environment filled with high concentrations of gas outside the product warranty range, the dehumidifying capacity may suddenly decrease within a few months.

[0026] The investigation revealed that lithium nitrite is used mainly in concrete structures in salt-damaged regions to prevent corrosion and deterioration of internal steel materials due to salt penetration, and that when the amine compounds used in covering materials such as electrical wiring come into contact with the three components of the acidic solid polymer electrolyte membrane 3, a nitrosation reaction progresses, and nitroso compounds are generated on the surface of the solid electrolyte membrane 3, which then wets and spreads to the anode-side catalyst layer 5, causing a rapid decline in the dehumidification capacity of the dehumidifier. At least, the nitrosation reaction requires contaminated gas 600 containing both the nitrite ions contained in lithium nitrite and the amine compounds, and it is believed that removing either one of the components can suppress contamination of the dehumidifier.

[0027] FIG. 2 is a cross-sectional view illustrating the operation of the dehumidifier according to the first embodiment in comparison with a comparative example. The dehumidifier according to the first embodiment shown in FIG. 2(a) is a simplified version of the dehumidifier 100 according to the first embodiment shown in FIG. 1, showing only the cationic porous body 10, the anode-side catalyst layer 5, the anode porous electrode 4, and the solid polymer electrolyte membrane 3. The comparative example shown in FIG. 2(b) is the dehumidifier according to the first embodiment from which the cationic porous body 10 has been removed. Moisture 500 and pollutant gas 600 are present in the dehumidification space 300.

[0028] In the comparative example, as shown in FIG. 2(b), contaminant gas 600 is adsorbed on the surface of the solid polymer electrolyte membrane 3, forming a nitroso compound-contaminated region 14. In the region where the nitroso compound-contaminated region 14 is formed, the anode-side catalyst layer 5 and moisture 500 cannot come into direct contact with each other, and therefore the reaction of (Equation 1) does not occur. As more nitroso compound-contaminated regions 14 are formed, the region where the reaction of (Equation 1) does not occur becomes larger, and eventually the reaction of (Equation 1) no longer occurs at all in the anode-side catalyst layer 5.

[0029] On the other hand, as shown in FIG. 2(a), the dehumidifier according to the present disclosure includes a cationic porous body 10, and therefore moisture 500 in the dehumidification space 300 passes through the cationic porous body 10 to reach the anode-side catalyst layer 5, where the reaction of formula 1 occurs. However, nitrite ions contained in the polluted gas 600 in the dehumidification space 300 are adsorbed and removed by the cationic porous body 10, and therefore do not reach the solid polymer electrolyte membrane 3, and a nitroso compound-contaminated region 14 is not formed. Therefore, the dehumidifier according to the present disclosure can suppress a decrease in dehumidification capacity due to the polluted gas 600.

[0030] Electrolytic dehumidifiers, such as the dehumidifier disclosed herein, are used in electrical control devices such as surveillance cameras, precision instruments, display cases, and electrical control panels. They are used to prevent condensation on surveillance cameras, suppress humidity increases within precision instruments, prevent deterioration of exhibits in display cases, and prevent condensation on electrical control panels. When electrolytic dehumidifiers are used for such purposes, the dehumidification space is often enclosed, with little gas exchange within the dehumidification space. Therefore, for electrolytic dehumidifiers, maintaining dehumidification performance over a long period of time is more important than dehumidification performance per unit time. The dehumidifier disclosed herein includes a cationic porous body 10 that allows moisture 500 to permeate from the dehumidification space 300 to the anode-side catalyst layer 5 and adsorbs components of the pollutant gas 600. This prevents a decrease in dehumidification capacity due to the pollutant gas 600, thereby extending the life of the electrolytic dehumidifier.

[0031] Next, a description will be given of the materials of the respective components of the dehumidifier according to the present embodiment 1. An example will be shown below, but other materials may be used as long as they exhibit similar performance.

[0032] The cationic porous body 10 is preferably in the form of a porous body such as a nonwoven fabric, sponge, fabric, porous film, honeycomb, etc. Non-porous films and sheets are not preferred because they have a small specific surface area and are poor at adsorbing pollutant gases.

[0033] The porous material used for the cationic porous body 10 is preferably a water-insoluble polymer, metal, glass, ceramic, activated carbon, or the like. In the case of a water-insoluble polymer, polypropylene, polyethylene, polyethylene terephthalate, rayon, nylon, polyurethane, silicone resin, or the like, which have excellent water and chemical resistance, are preferred. In the case of a metal, aluminum, titanium, stainless steel, copper, or the like are preferred. In the case of glass, quartz glass, soda-lime glass, borosilicate glass, lead glass, crystallized glass, or the like are preferred. In the case of ceramic, metal oxides such as alumina, silica, and titanium oxide are preferred. Among these, rayon, nylon, and polyurethane, which have high water vapor permeability in the material itself, are preferred because they suppress the decline in dehumidifying performance. However, these materials are merely examples, and any material commonly used for porous bodies may be used.

[0034] Preferred methods for imparting cationic properties to porous bodies include mixing a cationic component into the porous body during production or impregnating and coating the surface of the porous body with the cationic component. The cationic component used in these methods is preferably a quaternary ammonium salt compound, and can be selected from compounds such as ammonium hydroxide, ammonium fluoride, ammonium chloride, ammonium bromide, and ammonium iodide. Nonvolatile ionic liquids, quaternary ammonium base-containing acrylate polymers, and quaternary ammonium base-containing silane coupling agents are particularly preferred, as they can be stably supported on the porous body for long periods of time. Examples of such materials include KBM-9418-40 (manufactured by Shin-Etsu Silicone Co., Ltd.) and 1WX (manufactured by Taisei Fine Chemical Co., Ltd.). Furthermore, if counterion substitution has progressed due to contamination with nitrite over a certain period of time and cleaning and reapplication are required, quaternary ammonium salt compounds with insufficient long-term stability may be used.

[0035] The thickness of the cationic porous body 10 is preferably 20 μm or more and 50 mm or less. If the thickness is less than 20 μm, the amount of nitrite ions that can be adsorbed per unit area is small, which is not preferable. On the other hand, if the thickness is greater than 10 mm, the amount of nitrite ions that can be adsorbed per unit area is large, but the size of the dehumidifier is large, which is not preferable.

[0036] The air permeability of the cationic porous body 10 is preferably 500 sec / 100 cc or less. If the air permeability is greater than 500 sec / 100 cc, the porous body will have few interconnected voids in the film thickness direction, and a sufficient effect of removing nitrite ions will not be obtained.

[0037] The water vapor permeability of the cationic porous material 10 is preferably higher than that of the polymer electrolyte membrane 3. If the water vapor permeability of the cationic porous material 10 is lower than that of the polymer electrolyte membrane 3, the dehumidifying performance is impaired, which is not preferable.

[0038] The water vapor permeability of the polymer electrolyte membrane 3 is 6 kg / m at 30°C and 80% RH according to the Mocon method. 2 The water vapor transmission rate of the cationic porous body 10 is preferably higher than that of the polymer electrolyte membrane 3 when the same measurement conditions are used.

[0039] The anode-side power supply 7 and the anode porous electrode 4 are made of titanium material with a plated film. The anode-side catalyst layer 5 is formed by applying a mixture of platinum particles, Nafion liquid, and water to the anode porous electrode 4. The solid polymer electrolyte membrane 3 is a Nafion membrane or an electrolyte membrane with hydrogen ion conductivity. The cathode porous electrode 1 is made of a carbon sheet. The cathode-side catalyst layer 2 is made of a platinum-supported carbon powder catalyst or the same catalyst as the anode-side catalyst layer 5. Titanium or stainless steel is used for the cathode side current feeder 6, the anode side frame 11, and the cathode side frame 12. To prevent current from flowing between the anode side frame 11 and the cathode side frame 12, which sandwich the dehumidifying membrane 50, a metal screw with an insulating tube or a resin screw is used as the screw 13.

[0040] Next, a method for manufacturing the dehumidifier according to the first embodiment will be described. First, a cathode-side catalyst layer 2 is applied to the surface of a cathode porous electrode 1. Next, the cathode porous electrode 1 to which the cathode-side catalyst layer 2 has been applied, a solid polymer electrolyte membrane 3, and an anode porous electrode 4 are stacked and pressed together to form an integrated structure. Next, an anode-side catalyst layer 5 is applied to the surface of the anode porous electrode 4 to form a dehumidifying membrane 50.

[0041] Thereafter, as shown in FIG. 3 , the outer peripheries of the cationic porous body 10, the anode side current collector 7, the dehumidifying membrane 50, and the cathode side current collector 6 are sandwiched between the anode side frame 11 and the cathode side frame 12, and the anode side frame 11 and the cathode side frame 12 are fastened together with screws 13 to manufacture the dehumidifier 100.

[0042] As described above, in the method for manufacturing a dehumidifier according to the first embodiment, the outer peripheries of the cationic porous body 10, the anode side current collector 7, the dehumidifying membrane 50, and the cathode side current collector 6 are sandwiched between the anode side frame 11 and the cathode side frame 12, and the anode side frame 11 and the cathode side frame 12 are fastened together with the screws 13 to manufacture the dehumidifier 100, thereby suppressing a decrease in the dehumidifying capacity of the dehumidifier due to contaminated gases.

[0043] Embodiment 2 Figure 4 is a cross-sectional view showing the configuration of a dehumidifier according to embodiment 2. A dehumidifier 110 in Figure 4 differs from dehumidifier 100 according to embodiment 1 in that an anode side frame opening 111a of an anode side frame 111 is larger than an anode side frame opening 11a of an anode side frame 11 in embodiment 1 and a cathode side frame opening 121a of a cathode side frame 121 is larger than a cathode side frame opening 12a of a cathode side frame 12 in embodiment 1.

[0044] The rate at which the moisture permeability of the cationic porous body 10 decreases depends on the size of the area where the cationic porous body 10 is in contact with the dehumidifying space 300; the larger this area is, the slower the rate at which the moisture permeability decreases. In the dehumidifier 110 according to embodiment 2, the size of the area where the cationic porous body 10 is in contact with the dehumidifying space 300, i.e., the size of the anode side frame opening 111a of the anode side frame 111, is larger than the anode side frame opening 11a of the anode side frame 11 according to embodiment 1. Therefore, the rate at which the moisture permeability of the cationic porous body decreases can be made slower than in the dehumidifier according to embodiment 1.

[0045] Embodiment 3 Figure 5 is a cross-sectional view showing the configuration of a dehumidifier according to embodiment 3. A dehumidifier 120 in Figure 5 differs from the dehumidifier 100 according to embodiment 1 in that an anode side packing material 15 having an anode side packing material opening 15a is installed between the cationic porous body 10 and the anode side frame 11, and a cathode side packing material 16 having a cathode side packing material opening 16a is installed between the cathode side power feeder 6 and the cathode side frame 12.

[0046] The anode side packing material 15 and the cathode side packing material 16 increase the airtightness of the dehumidifier 120 and prevent gas from passing through the dehumidifying space 300 and the humidifying space 400. In the dehumidifier 120 according to the third embodiment, a conductive metal may be used as the material of the screws.

[0047] As described above, in the dehumidifier 120 according to the third embodiment, the cationic porous body 10 and the anode side current collector 7, and the cathode side current collector 6 and the cathode side frame 12 are sandwiched between the anode side frame 11 and the cathode side frame 12 with packing materials interposed therebetween, thereby preventing gas from passing through the dehumidifying space and the humidifying space. As a result, moisture does not move from the humidifying space to the dehumidifying space, and the humidity in the dehumidifying space can be reduced more effectively.

[0048] Embodiment 4 Figure 6 is a cross-sectional view showing the configuration of a dehumidifier according to embodiment 4. A dehumidifier 130 in Figure 6 differs from the dehumidifier 110 according to embodiment 2 in that an anode side packing material 151 having an anode side packing opening 151a is placed between the cationic porous body 10 and the anode side frame 111, and a cathode side packing material 161 having a cathode side packing opening 161a is placed between the cathode side power feeder 6 and the cathode side frame 121.

[0049] The anode side packing material 151 and the cathode side packing material 161 increase the airtightness of the dehumidifier 130 and prevent gas from passing through the dehumidifying space 300 and the humidifying space 400. In the dehumidifier 130 according to the fourth embodiment, a conductive metal may be used as the material of the screws.

[0050] As described above, in the dehumidifier 130 according to the fourth embodiment, the cationic porous body 10 and the anode side current collector 7, and the cathode side current collector 6 and the cathode side frame 12 are sandwiched between the anode side frame 11 and the cathode side frame 12 with packing interposed therebetween, thereby preventing gas from passing through the dehumidifying space and the humidifying space. As a result, in addition to the effects of the dehumidifier according to the second embodiment, moisture does not move from the humidifying space to the dehumidifying space, and the humidity in the dehumidifying space can be reduced more effectively.

[0051] Embodiment 5. 7 is a cross-sectional view showing the configuration of a dehumidifier according to embodiment 5. In the dehumidifier 100 according to embodiment 1, the outer peripheries of the cationic porous body 10, anode side current collector 7, dehumidifying membrane 50, and cathode side current collector 6 are sandwiched between an anode side frame 11 and a cathode side frame 12 and fastened with screws 13. On the other hand, in the dehumidifier 140 according to embodiment 5, the outer periphery of the cationic porous body 10 is sandwiched between a cationic porous body side frame 17 and an anode side frame 11 and fastened with screws 18, and the outer peripheries of the anode side current collector 7, dehumidifying membrane 50, and cathode side current collector 6 are sandwiched between an anode side frame 11 and a cathode side frame 12 and fastened with screws 13.

[0052] Although the deterioration is minor compared to the deterioration of the anode-side catalyst layer 5, the cationic porous body 10 also deteriorates due to the adsorption of pollutant gases, resulting in a decrease in the permeability to moisture 500. In the dehumidifier 140 according to embodiment 5, the cationic porous body 10 alone can be removed by unscrewing the cationic porous body fixing screws 18, and the cationic porous body 10 can be easily replaced. By replacing the cationic porous body 10, it is possible to recover the dehumidifying performance of the dehumidifier 140 that has decreased due to a decrease in the moisture permeability of the cationic porous body 10.

[0053] In the dehumidifier 100 according to embodiment 1, the anode side frame 11, cationic porous body 10, anode side current collector 7, dehumidifying membrane 50, cathode side current collector 6, and cathode side frame 12 are stacked together, and the anode side frame 11 and the cathode side frame 12 are fastened together with screws 13. Therefore, in order to replace the cationic porous body 10, it is necessary to remove the screws 13. In this case, when the cationic porous body 10 is replaced, the positions of the anode side current collector 7, dehumidifying membrane 50, and cathode side current collector 6 may become misaligned or the contact pressure may change, which may result in a deterioration in the performance of the dehumidifier.

[0054] In the dehumidifier 140 according to the fifth embodiment, the cationic porous body 10 is attached independently of the anode-side current collector 7, the dehumidifying membrane 50, and the cathode-side current collector 6. Therefore, by removing the cationic porous body fixing screws 18, the cationic porous body 10 can be replaced without affecting the other components.

[0055] Next, a manufacturing method of a dehumidifier 140 according to the fifth embodiment will be described with reference to Fig. 8. Fig. 8 is a diagram for explaining the manufacturing method of a dehumidifier according to the fifth embodiment. As shown in Fig. 8(a), first, the outer periphery of the cationic porous body 10 is sandwiched between the cationic porous body side frame 17 and the anode side frame 11, and the cationic porous body side frame 17 and the anode side frame 11 are screwed together with screws 18 to form a cationic porous body module 19.

[0056] Thereafter, a dehumidifying membrane 50 is produced in the same manner as in embodiment 1, and as shown in Figure 8(b), the outer peripheries of the anode side power supply 7, the dehumidifying membrane 50, and the cathode side power supply 6 are sandwiched between the anode side frame 11 and the cathode side frame 12 of the cationic porous body module 19, and the anode side frame 11 and the cathode side frame 12 of the cationic porous body module 19 are screwed together with screws 13 to produce a dehumidifier 140.

[0057] As described above, in the method for manufacturing the dehumidifier 140 according to the fifth embodiment, the cationic porous body side frame 17 having the cationic porous body side frame openings 17a, the cationic porous body 10, and the anode side frame 11 having the anode side frame openings 11a are stacked one on top of the other, and the cationic porous body side frame 17 and the anode side frame 11 are screwed together to form the cationic porous body module 19. Therefore, the cationic porous body 10 can be replaced by removing the screws 18 without affecting the other components, and the dehumidifying performance of the dehumidifier 140 can be restored if it has decreased due to a decrease in the moisture permeability of the cationic porous body 10.

[0058] Embodiment 6 Fig. 9 is a cross-sectional view showing the configuration of a dehumidifier according to embodiment 6. Comparing a dehumidifier 150 shown in Fig. 9 with the dehumidifier 140 according to embodiment 5 shown in Fig. 7, the dehumidifier 150 shown in Fig. 9 differs from the dehumidifier 140 according to embodiment 5 shown in Fig. 7 in that the anode side frame opening 111a is larger than the anode side frame opening 11a, the cathode side frame opening 121a is larger than the cathode side frame opening 12a, and the cationic porous body side frame opening 171a is larger than the cationic porous body side frame opening 17a.

[0059] The moisture permeability of the cationic porous body 10 depends on the size of the area in the cationic porous body 10 through which moisture 500 permeates; the larger this area, the higher the moisture permeability. In the dehumidifier 100 according to embodiment 1 shown in FIG. 1 , the size of the area in the cationic porous body 10 through which moisture 500 permeates is the same as the size of the anode-side current collector opening 7a, i.e., the size of the area in which the anode-side catalyst layer 5 contacts the space. However, in the dehumidifier 150 according to embodiment 6, the size of the area in the cationic porous body 10 through which moisture 500 permeates does not depend on the size of the anode-side current collector opening 7a, but depends on the sizes of the anode-side frame opening 111a and the cationic porous body-side frame opening 171a.

[0060] Therefore, as shown in Figure 9, by making the anode side frame opening 111a and the cationic porous body side frame opening 171a larger than the anode side power supply opening 7a, the moisture permeability of the cationic porous body 10 can be made higher than that of the dehumidifier 100 of embodiment 1.

[0061] Embodiment 7 Fig. 10 is a cross-sectional view showing the configuration of a dehumidifier according to Embodiment 7. Comparing a dehumidifier 160 shown in Fig. 10 with the dehumidifier 150 according to Embodiment 6 shown in Fig. 9, the dehumidifier 160 shown in Fig. 10 differs from the dehumidifier 150 according to Embodiment 6 shown in Fig. 9 in that the cationic porous body 101 is larger than the cationic porous body 10, the anode side frame opening 112a is larger than the anode side frame opening 111a, the cathode side frame opening 122a is larger than the cathode side frame opening 121a, and the cationic porous body side frame opening 172a is larger than the cationic porous body side frame opening 171a. The anode side frame opening 112a may extend beyond the anode side catalyst layer 5 as long as the anode side frame 112 and the anode side power feeder 71 are in contact with each other at the outer periphery of the opening.

[0062] In this way, by increasing the size of the cationic porous body 101, the size of the anode side frame opening 112a, and the size of the cationic porous body side frame opening 172a, the area in the cationic porous body 101 through which moisture 500 permeates becomes even larger, and the decrease in moisture permeability can be further suppressed.

[0063] Embodiment 8 FIG. 11 is a cross-sectional view showing the configuration of a dehumidifier according to the eighth embodiment. Comparing a dehumidifier 170 shown in FIG. 11 with the dehumidifier 140 according to the fifth embodiment shown in FIG. 7, the dehumidifier 170 shown in FIG. 11 differs from the dehumidifier 140 according to the fifth embodiment in that an anode-side packing material 15 having an anode-side packing material opening 15a is installed between the anode-side current feeder 7 and the anode-side frame 11, a cathode-side packing material 16 having a cathode-side packing material opening 16a is installed between the cathode-side current feeder 6 and the cathode-side frame 12, and cationic porous body-side packing materials 20 having cationic porous body-side packing material openings 20a are installed between the anode-side frame 11 and the cationic porous body 10 and between the cationic porous body 10 and the cationic porous body-side frame 17. The decontamination space 700 is a space surrounded by the anode-side catalyst layer 5 and the cationic porous body 10.

[0064] The anode side packing material 15, the cathode side packing material 16, and the cationic porous body side packing material 20 improve the airtightness of the dehumidifier 170. Specifically, the cationic porous body side packing material 20 prevents the contaminated gas 600 from passing through the dehumidification space 300 and the decontamination space 700. The anode side packing material 15 and the cathode side packing material 16 prevent the gas from passing through the decontamination space 700 and the humidification space 400. In the dehumidifier 170 according to the eighth embodiment, the screws 13 and the cationic porous body fixing screws 18 may be made of a conductive metal.

[0065] As described above, in the dehumidifier 170 according to the eighth embodiment, the cationic porous body-side packing material 20 with the cationic porous body-side packing opening 20a is installed between the anode-side frame 11 and the cationic porous body 10 and between the cationic porous body 10 and the cationic porous body-side frame 17. This eliminates the movement of contaminated gas between the dehumidification space and the decontamination space, enabling the cationic porous body to more effectively remove contaminated gas. Furthermore, the anode-side packing material 15 with the anode-side packing opening 15a is installed between the anode-side current feeder 7 and the anode-side frame 11, and the cathode-side packing material 16 with the cathode-side packing opening 16a is installed between the cathode-side current feeder 6 and the cathode-side frame 12. This eliminates the movement of gas between the decontamination space and the humidification space, preventing moisture from moving from the humidification space to the decontamination space, thereby more effectively reducing the humidity in the dehumidification space.

[0066] Fig. 12 is a cross-sectional view of another example of a dehumidifier according to embodiment 8. The dehumidifier 180 shown in Fig. 12 is obtained by adding an anode-side packing material 151, a cathode-side packing material 161, and a cationic porous body-side packing material 201 to the dehumidifier 150 according to embodiment 6 shown in Fig. 9. The dehumidifier 180 shown in Fig. 12 not only has the effect of more effectively suppressing the decrease in moisture permeability of the cationic porous body 10, which is the effect of the dehumidifier 150 shown in Fig. 9, but also can more effectively remove the pollutant gas 600 by the cationic porous body 10, and can more effectively reduce the humidity in the dehumidification space 300.

[0067] Fig. 13 is a cross-sectional view of another example of a dehumidifier according to embodiment 8. The dehumidifier 190 shown in Fig. 13 is obtained by adding a cathode-side packing material 162, an anode-side packing material 152, and a cationic porous body-side packing material 202 to the dehumidifier 160 according to embodiment 7 shown in Fig. 10. The dehumidifier 190 shown in Fig. 13 not only further suppresses the decrease in moisture permeability of the cationic porous body 101, which is the effect of the dehumidifier 160 shown in Fig. 10, but also more effectively removes the pollutant gas 600 using the cationic porous body 101, and more effectively reduces the humidity in the dehumidification space 300.

[0068] Embodiment 9 In the ninth embodiment, a more preferable mounting method for a dehumidifier in a dehumidification space will be described. FIGS. 18 and 19 are cross-sectional views showing the mounting method of a dehumidifier in a dehumidification space according to the ninth embodiment. FIG. 18 is a cross-sectional view of a case where the dehumidifier 100 shown in the first embodiment is mounted on the dehumidification space side of the container wall 33 separating the dehumidification space 300 and the humidification space 400 via the container wall side packing 34. On the other hand, FIG. 19 is a cross-sectional view of a case where the dehumidifier 100 shown in the first embodiment is mounted on the humidification space side of the container wall 33 separating the dehumidification space 300 and the humidification space 400 via the container wall side packing 34, but the mounting directions are different. Hereinafter, for convenience, the mounting direction shown in FIG. 18 will be referred to as the internal mounting method, and the mounting direction shown in FIG. 19 will be referred to as the external mounting method.

[0069] The dehumidifiers shown in Embodiments 1 to 8 all include cationic porous bodies 10, 101 that suppress deterioration of the anode-side catalyst layer 5. Therefore, the anode-side catalyst layer 5 is less likely to deteriorate than dehumidifiers without cationic porous bodies. However, with regard to the installation direction of the dehumidifier, an external installation type as shown in Fig. 19 is more preferable. In the internal installation type shown in Fig. 18, the cationic porous body 10 and the anode-side current feeder 7 are adjacent to the dehumidification space 300 containing the polluted gas 600. Therefore, the polluted gas 600 may enter the decontamination space 700 facing the anode-side catalyst layer 5 through the gap between the cationic porous body 10 and the anode-side current feeder 7, potentially contaminating the anode-side catalyst layer 5. In contrast, in the external installation type shown in Fig. 19, the cationic porous body 10 and the anode-side current feeder 7 are not adjacent to the dehumidification space 300 containing the polluted gas 600. Therefore, the anode-side catalyst layer is not contaminated.

[0070] Embodiment 10 FIG. 20 is a cross-sectional view showing the configuration of a dehumidifier according to the tenth embodiment. The dehumidifier 210 according to the tenth embodiment may be mounted either internally or externally, but the figure shows the case of internal mounting, which is more effective in the tenth embodiment. When the dehumidifier 210 is mounted internally, one method of preventing deterioration of the catalyst layer 5 is to sandwich both sides of the cationic porous body with cationic porous body-side packing materials 20, as in the method of the eighth embodiment shown in FIGS. 11 to 13. In addition, the configuration of the dehumidifier according to the tenth embodiment is effective. Comparing the dehumidifier 210 shown in FIG. 20 with the dehumidifier 100 according to the first embodiment shown in FIG. 1, the dehumidifier 210 shown in FIG. 20 differs in that the cationic porous body-side packing material 20 is interposed between the cationic porous body 10 and the anode-side current collector 7.

[0071] The cationic porous body-side packing material 20 increases the airtightness of the dehumidifier 210 and prevents gas from passing between the dehumidification space 300 and the decontamination space 700. In the dehumidifier 210 according to the tenth embodiment, a conductive metal may be used as the material for the screws.

[0072] In this embodiment 10, the cationic porous body-side packing material 20 is interposed between the cationic porous body 10 and the anode-side current collector 7, so that it is possible to prevent contaminant gases from entering the decontamination space. Therefore, even when a dehumidifier is installed internally, it is possible to prevent deterioration of the anode-side catalyst tank.

[0073] Embodiment 11 FIG. 21 is a cross-sectional view showing the configuration of a dehumidifier according to Embodiment 11. A dehumidifier 220 according to Embodiment 11 may be mounted either internally or externally, but the figure shows an internal mounting configuration, which is more effective in Embodiment 11. Comparing the dehumidifier 220 shown in FIG. 21 with the dehumidifier 100 according to Embodiment 1 shown in FIG. 1, the dehumidifier 220 shown in FIG. 21 differs in that the anode side frame 113 and the cathode side frame 123 are sealed with an inter-frame packing material 35, and a cationic porous body-side packing material 20 is interposed between the anode side frame 113 and the cationic porous body 10. Note that in the dehumidifier 220 according to Embodiment 11, a conductive metal may be used as the material of the screws.

[0074] The inter-frame packing material 35 increases the airtightness of the dehumidifier 220 and prevents gas from passing between the dehumidification space 300 and the decontamination space 700. The anode side frame 113 having the protrusion 113b and the cathode side frame 123 are sealed with the inter-frame packing material 35, which prevents the contaminated gas 600 from entering the decontamination space 700.

[0075] FIG. 21 is an exploded perspective view showing the configuration of a dehumidifier according to embodiment 11. As shown in FIG. 21 , the protrusions 113b protrude so as to cover the entire periphery of the anode frame, and by being in close contact with the cathode side frame 123 via the inter-frame packing material 35, it is possible to prevent the contaminated gas 600 from entering the decontamination space 700. In embodiment 11, it is possible to prevent deterioration of the anode side catalyst tank 5 even when the dehumidifier is installed using the internal mounting method as shown in FIG. 18 . Note that although FIGS. 21 and 22 show the anode side frame 113 protruding toward the cathode side frame side 123, the cathode side frame may also have a protruding structure, and the shapes of the anode side frame and cathode side frame are not particularly specified as long as they are shapes that can prevent the contaminated gas 600 from entering the decontamination space 700.

[0076] 23 is a cross-sectional view of a further example of a dehumidifier according to embodiment 11. A dehumidifier 230 shown in Fig. 22 differs from the dehumidifier 150 according to embodiment 6 shown in Fig. 9 in that the anode side frame 114 and the cathode side frame 124 are sealed with inter-frame packing 35 and a cationic porous body-side packing 20 is inserted between the anode side frame 114 and the cationic porous body 10. The dehumidifier 230 shown in Fig. 23 not only further suppresses the decrease in moisture permeability of the cationic porous body 10, which is the effect of the dehumidifier 150 shown in Fig. 9, but also prevents contaminated gas 600 from entering the decontamination space 700 because the anode side frame 114 and the cathode side frame 124 are sealed with inter-frame packing 35.

[0077] Embodiment 12 24 is a cross-sectional view showing the configuration of a dehumidifier according to embodiment 12. A dehumidifier 240 of embodiment 12 includes a poisoning prevention membrane 24 between the cationic porous body 10 and the anode-side surface 50a. The cationic porous body 10 and the poisoning prevention membrane 24 provided on the back surface of the cationic porous body 10 cover the anode-side current collector opening 7a of the anode-side current collector 7. Therefore, gas in the dehumidifying space 300 passes through the anode-side frame opening 11a of the anode-side frame 11, permeates the cationic porous body 10, further permeates the poisoning prevention membrane 24, passes through the anode-side current collector opening 7a, and comes into contact with the anode-side surface 50a of the dehumidifying membrane 50.

[0078] The poisoning prevention membrane 24 is made of Nafion®, a perfluorocarbon material composed of a hydrophobic Teflon® skeleton and perfluoro side chains with sulfonic acid groups. It is a copolymer of tetrafluoroethylene and perfluoro[2-(fluorosulfonylethoxy)propylvinyl ether]. However, other materials may be used as long as they allow moisture 500 to permeate from the dehumidification space 300 to the anode-side catalyst layer 5 and prevent the permeation of contaminant gas 600. For example, a cellophane membrane, a Nexar® membrane manufactured by Kraton Polymers, cellulose acetate, polyurethane, or the like may also be used. When Nafion is used, the poisoning prevention membrane 24 has a thickness of 40 to 200 μm, and when cellophane is used, the thickness is 20 to 100 μm. These materials may also be used in combination, or multiple sheets may be stacked.

[0079] With this configuration, the dehumidifier 240 can suppress the adhesion of nitrite ions to the electrolyte membrane, as well as the adhesion of polluting gases such as siloxane gas, hydrochloric acid gas, nitric acid gas, sulfur oxide gas, nitrogen oxide gas, oxime gas, and diethylamine gas, thereby further preventing a decrease in dehumidification capacity.

[0080] Furthermore, if the poisoning prevention membrane 24 is placed outside the cationic porous body, the substance (nitrite ion) that is to be removed by the cationic porous body 10 will adhere to the poisoning prevention membrane 24, impairing the functions of both. [Example]

[0081] The results of a performance comparison test of dehumidifiers according to the present disclosure are shown below. Figure 14 is a cross-sectional view of a dehumidifier of a comparative example used in the performance comparison test. Comparing dehumidifier 200 shown in Figure 14 with dehumidifier 120 shown in Figure 5, they have the same configuration except for the absence of a cationic porous body.

[0082] Fig. 15 is a diagram showing the test environment for the performance comparison test. In this test environment, a performance comparison test was carried out between the dehumidifier 120 according to the third embodiment shown in Fig. 5, the dehumidifier 190 according to the eighth embodiment shown in Fig. 13, and the dehumidifier 200 of the comparative example shown in Fig. 14. Note that the installation direction of the dehumidifier in this example was an external installation type as shown in the ninth embodiment, and the structure was such that the contaminated gas 600 would not enter the decontamination space 700.

[0083] The specifications of the dehumidifiers used in the performance comparison test are shown in Figure 16. The exposed area of ​​the anode-side catalyst layer 5, i.e., the area of ​​the anode-side power supply openings 7a and 71a in the dehumidifier 120 shown in Figure 5, the dehumidifier 190 shown in Figure 13, and the dehumidifier 200 shown in Figure 14, is 25 mm x 50 mm = 1250 mm. 2 It was decided.

[0084] In the dehumidifier 120 shown in FIG. 5, the area of ​​the cationic porous body 10 in contact with the dehumidifying space 300 is the same as the area of ​​the anode-side power supply opening 7a, and is 25 mm×50 mm=1250 mm 2 is.

[0085] In the dehumidifier 190 shown in FIG. 13, the area of ​​the cationic porous body 101 in contact with the dehumidification space 300 is 50 mm × 50 mm = 2500 mm, which is about 2.0 times the exposed area of ​​the anode-side catalyst layer 5. 2 It was decided.

[0086] In the test environment shown in FIG. 15 , the dehumidifiers 200, 120, and 190 were installed in the test box 30 so that the dehumidification space 300 was inside the test box 30, i.e., so that the anode-side catalyst layer 5 was inside the test box 30. Inside the test box 30, a lithium nitrite container 31 containing a saturated aqueous solution of lithium nitrite for generating the pollutant gas 600 and an amine compound container 32 containing dibutylamine for generating nitroso compounds were placed, and the test box 30 was sealed to prevent exchange of outside air with the gas inside the test box 30. The test box 30 had a capacity of 8 liters. To maintain a high humidity level inside the test box 30, when the water in the lithium nitrite container 31 ran out, water was replenished and the test box 30 was resealed. The environment inside and outside the test box 30 was not particularly controlled, and an outdoor exposure test was performed.

[0087] As described above, a high-humidity environment filled with pollutant gas 600 was created inside test box 30, and dehumidifiers 200, 120, and 190 were operated continuously for 30 days under this environment, and the dehumidifying capacities were measured before and after the continuous operation. For dehumidifier 120 according to embodiment 3, the dehumidifying capacity was also measured before and after the continuous operation when cationic porous body 10 was removed. Similarly, for dehumidifier 190 according to embodiment 8, the dehumidifying capacity was also measured before and after the continuous operation when cationic porous body 101 was removed.

[0088] The results of the performance comparison test are shown in Figure 17. The results of No. 2-2 and No. 3-2 show that in the dehumidifier 120 equipped with the cationic porous body 10 and the dehumidifier 190 equipped with the cationic porous body 101, the dehumidifying capacity of the dehumidifying membrane 50 excluding the cationic porous body 10 or the cationic porous body 101 was not reduced. This indicates that the cationic porous body 10 or the cationic porous body 101 suppressed the generation of nitroso compounds caused by the pollutant gas 600, and thus suppressed the deterioration of the anode-side catalyst layer 5.

[0089] Although No. 2-1 and No. 3-1 have smaller dehumidification capacity values ​​than No. 1, which is a comparative example dehumidifier 200, the capacity decline rate (= ("dehumidification capacity before continuous operation" - "dehumidification capacity after continuous operation") / "dehumidification capacity before continuous operation") is small, less than half that of No. 1. This shows that the decline in dehumidification capacity can be suppressed in the dehumidifiers of the present disclosure. Furthermore, dehumidifier 190 No. 3-2, which is equipped with a cationic porous body 101 with a larger area through which moisture 500 permeates, has a lower capacity decline rate than dehumidifier 120 No. 2-2. This shows that the provision of a cationic porous body 101 with a larger area through which moisture 500 permeates further suppresses the decline in dehumidification capacity.

[0090] Although various exemplary embodiments and examples are described in this application, the various features, aspects, and functions described in one or more embodiments are not limited to the application of a particular embodiment, but may be applied to the embodiments alone or in various combinations. Therefore, countless variations not illustrated are contemplated within the scope of the technology disclosed in this specification. For example, this includes cases where at least one component is modified, added, or omitted, or where at least one component is extracted and combined with components of another embodiment.

[0091] Various aspects of the present disclosure are summarized below as appendices.

[0092] (Appendix 1) a dehumidifying membrane formed by laminating a cathode porous electrode coated with a cathode-side catalyst layer, a solid polymer electrolyte membrane, and an anode porous electrode, and by coating an anode-side catalyst layer on the surface of the anode porous electrode; a cathode-side power supply body having an opening facing the cathode-side surface of the dehumidifying membrane and electrically connected to the cathode porous electrode; an anode-side power supply body having an opening facing the anode-side surface of the dehumidifying membrane and electrically connected to the anode porous electrode; a cationic porous body that covers the opening of the anode-side current collector and that allows moisture to pass through and adsorbs and removes pollutant gases. (Appendix 2) 2. The dehumidifier according to claim 1, wherein the cationic porous body has a base material in the form of a nonwoven fabric, a sponge, a woven fabric, or a porous film. (Appendix 3) The dehumidifier according to claim 1 or 2, wherein the cationic porous body is made of a water-insoluble polymer, metal, glass, ceramic, or activated carbon. (Appendix 4) The dehumidifier according to any one of appendixes 1 to 3, wherein the cationic porous body uses a cationic component that is a quaternary ammonium salt compound. (Appendix 5) 5. The dehumidifier according to any one of claims 1 to 4, wherein the cationic porous body has a thickness of 20 μm or more and 50 mm or less. (Appendix 6) 6. The dehumidifier according to any one of claims 1 to 5, wherein the cationic porous body has an air permeability of 500 seconds / 100 cc or less. (Appendix 7) 7. The dehumidifier according to any one of claims 1 to 6, wherein the cationic porous body has a water vapor permeability higher than that of a polymer electrolyte membrane. (Appendix 8) The polymer electrolyte membrane has a water vapor permeability of 6 kg / m at 30°C and 80% RH measured by the Mocon method. 2 The dehumidifier according to any one of Supplementary Note 1 to Supplementary Note 7, characterized in that the dehumidifier has a life span of 10 days or more. (Appendix 9) A dehumidifier according to any one of appendices 1 to 8, characterized in that the size of the area through which moisture permeates in the cationic porous body is larger than the opening of the anode side current collector. (Appendix 10) 10. The dehumidifier according to any one of claims 1 to 9, wherein the cationic porous body has a poisoning prevention film provided on a rear surface thereof. (Appendix 11) a step of applying a cathode-side catalyst layer to a surface of a cathode porous electrode, laminating the cathode porous electrode to which the cathode-side catalyst layer has been applied, a solid polymer electrolyte membrane, and an anode porous electrode, and applying an anode-side catalyst layer to a surface of the anode porous electrode to form a dehumidifying membrane; a step of electrically connecting a cathode-side power supply body having an opening facing the cathode-side surface of the dehumidifying membrane to the cathode porous electrode; a step of electrically connecting an anode-side power supply body having an opening that faces the anode-side surface of the dehumidifying membrane to the anode porous electrode; A method for manufacturing a dehumidifier, comprising the step of providing a cationic porous body that is permeable to moisture but blocks the permeation of pollutant gases so as to cover the opening of the anode side current collector. (Appendix 12) An electrical control device comprising the dehumidifier according to any one of Supplementary Note 1 to Supplementary Note 10. [Explanation of symbols]

[0093] 1 cathode porous electrode, 2 cathode side catalyst layer, 3 solid polymer electrolyte membrane, 4 anode porous electrode, 5 anode side catalyst layer, 6 cathode side current feeder, 6a cathode side current feeder opening, 7 anode side current feeder, 7a anode side current feeder opening, 50 dehumidifying membrane, 50a anode side surface, 50b cathode side surface, 71a anode side current feeder opening, 101 cationic porous body, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 210, 220, 230, 240 dehumidifier.

Claims

1. a dehumidifying membrane formed by laminating a cathode porous electrode coated with a cathode-side catalyst layer, a solid polymer electrolyte membrane, and an anode porous electrode, and by coating an anode-side catalyst layer on the surface of the anode porous electrode; a cathode-side power supply body having an opening facing the cathode-side surface of the dehumidifying membrane and electrically connected to the cathode porous electrode; an anode-side power supply body having an opening facing the anode-side surface of the dehumidifying membrane and electrically connected to the anode porous electrode; a cationic porous body that covers the opening of the anode-side current collector and that allows moisture to pass through and adsorbs and removes pollutant gases.

2. 2. The dehumidifier according to claim 1, wherein the base material of the cationic porous body is in the form of a nonwoven fabric, a sponge, a woven fabric, or a porous film.

3. 2. The dehumidifier according to claim 1, wherein the cationic porous body is made of a material selected from the group consisting of a water-insoluble polymer, a metal, glass, ceramic, and activated carbon.

4. 2. The dehumidifier according to claim 1, wherein the cationic porous body contains a cationic component that is a quaternary ammonium salt compound.

5. 2. The dehumidifier according to claim 1, wherein the cationic porous body has a thickness of 20 μm or more and 50 mm or less.

6. 2. The dehumidifier according to claim 1, wherein the cationic porous body has an air permeability of 500 seconds / 100 cc or less.

7. 2. The dehumidifier according to claim 1, wherein the cationic porous body has a water vapor permeability higher than that of a polymer electrolyte membrane.

8. The polymer electrolyte membrane has a water vapor permeability of 6 kg / m at 30°C and 80% RH as measured by the Mocon method. 2 8. The dehumidifier according to claim 7, wherein the number of cycles is 1 day or more.

9. 2. The dehumidifier according to claim 1, wherein the size of the area of ​​the cationic porous body that is permeable to moisture is larger than the opening of the anode-side current collector.

10. 2. The dehumidifier according to claim 1, wherein the cationic porous body has a poisoning prevention film provided on the rear surface thereof.

11. a step of applying a cathode-side catalyst layer to a surface of a cathode porous electrode, laminating the cathode porous electrode to which the cathode-side catalyst layer has been applied, a solid polymer electrolyte membrane, and an anode porous electrode, and applying an anode-side catalyst layer to a surface of the anode porous electrode to form a dehumidifying membrane; a step of electrically connecting a cathode-side power supply body having an opening facing the cathode-side surface of the dehumidifying membrane to the cathode porous electrode; a step of electrically connecting an anode-side power supply body having an opening that faces the anode-side surface of the dehumidifying membrane to the anode porous electrode; A method for manufacturing a dehumidifier, comprising the step of providing a cationic porous body that is permeable to moisture but blocks the permeation of pollutant gases so as to cover the opening of the anode side current collector.

12. An electric control device comprising the dehumidifier according to any one of claims 1 to 10.

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