Adsorption element, humidity control device and atmospheric water generator

Abstract

To provide an adsorption element which makes it possible to suppress the detachment of metal organic frameworks, a humidity control device, and an atmospheric water generator.SOLUTION: An adsorption element comprises a base layer in which a fiber structure having fibers integrated therein and metal organic frameworks including metal ions and organic ligands are mixed, wherein the metal organic frameworks are sandwiched between fibers so as to be held by the fiber structure.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an adsorption element, a humidity control device, and an atmospheric water generator. [Background technology]

[0002] Metal-organic frameworks (MOFs) have been used as adsorbents to selectively adsorb specific substances.

[0003] For example, Patent Document 1 (JP Patent Publication No. 11-319461 A) proposes a filter medium in which activated carbon formed into a honeycomb or sheet shape is prepared, and an organometallic complex that selectively adsorbs nitrogen oxides is attached to the pore surfaces of the formed activated carbon. DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] In the filter medium described in Patent Document 1, the metal organic framework is simply attached to the surface of a support such as activated carbon. Therefore, when an adsorption element including the metal organic framework is used, there is a risk that the metal organic framework attached to the surface of the support such as activated carbon may be detached from the support. [Means for solving the problem]

[0005] The adsorption element according to a first aspect includes a substrate layer. The substrate layer is a mixture of a fibrous structure in which fibers are integrated and a metal-organic framework. The metal-organic framework includes metal ions and organic ligands. The metal-organic framework is sandwiched between the fibers and held by the fibrous structure.

[0006] The base material layer may be, for example, a mixed layer obtained by papermaking a liquid in which fibers and metal-organic frameworks are mixed and dispersed, or an integrated layer in which fibers and metal-organic frameworks are integrated in a mixed state, such as mixed paper.

[0007] Furthermore, in the base material layer, for example, it is preferable that the amount of metal-organic frameworks sandwiched between the fibers and held by the fiber structure is greater than the amount of metal-organic frameworks attached to the fiber surfaces without being sandwiched between the fibers, and it is preferable that the total weight in a dry state of the metal-organic frameworks sandwiched between the fibers and held by the fiber structure is greater than the total weight in a dry state of the metal-organic frameworks attached to the fiber surfaces without being sandwiched between the fibers.

[0008] In this adsorption element, the metal-organic framework is held by the fiber structure by being sandwiched between the fibers in the base material layer, which makes it possible to suppress the metal-organic framework from falling off from the adsorption element compared to when the metal-organic framework is attached to the surface of the fibers that make up the fiber structure.

[0009] An adsorption element according to a second aspect is the adsorption element of the first aspect, wherein the average fiber length of the fibers is 100 μm or more.

[0010] The average fiber length of the fibers is more preferably 300 μm or more.

[0011] In this adsorption element, the metal-organic framework easily becomes entangled with the fibers, and the effect of suppressing the metal-organic framework from falling off from the substrate layer is excellent.

[0012] An adsorption element according to a third aspect is the adsorption element according to the first or second aspect, wherein the substrate layer contains a binder.

[0013] This adsorption element has an excellent effect of suppressing the metal-organic framework from falling off from the substrate layer.

[0014] An adsorption element according to a fourth aspect is the adsorption element of the third aspect, wherein the binder has a diameter larger than the opening diameter of the metal-organic framework.

[0015] In this adsorption element, even when a binder is used, it is possible to suppress a decrease in the adsorption capacity of the metal-organic framework.

[0016] An adsorption element according to a fifth aspect is the adsorption element according to the third or fourth aspect, wherein the binder forms hydrogen bonds or ionic bonds with the fibers.

[0017] In this adsorption element, the bonds between the fibers can be strengthened.

[0018] An adsorption element according to a sixth aspect is the adsorption element according to any one of the first to fifth aspects, further comprising an air-permeable layer. The air-permeable layer is laminated on the base material layer. The air-permeable layer has a lower content of the metal-organic framework per unit area as viewed in the lamination direction than the base material layer, or does not have the metal-organic framework.

[0019] For example, the breathable layer may have a content of the metal-organic framework per unit area as viewed in the stacking direction that is half or less of that of the base material layer, or may have a content that is one-fifth or less of that of the base material layer, or may not have any metal-organic framework.

[0020] This adsorption element further includes an air-permeable layer laminated on the base material layer, and therefore, even if the metal-organic framework falls off from the base material layer, the air-permeable layer can capture the fallen metal-organic framework, thereby sufficiently suppressing the metal-organic framework from falling off from the adsorption element.

[0021] The breathable layer laminated on the base layer is breathable, and therefore allows the passage of substances such as moisture that are adsorbed by the metal-organic structure of the base layer.

[0022] An adsorption element according to a seventh aspect is the adsorption element according to the sixth aspect, wherein the breathable layer has a first breathable layer and a second breathable layer, and the base material layer is located between the first breathable layer and the second breathable layer.

[0023] In this adsorption element, the substrate layer is sandwiched between the first breathable layer and the second breathable layer, so that the metal organic framework can be more sufficiently prevented from falling off from the adsorption element.

[0024] An adsorption element according to an eighth aspect is the adsorption element according to the sixth or seventh aspect, wherein the thickness of the base material layer is greater than the thickness of the breathable layer.

[0025] In addition, in the adsorption element according to the seventh aspect, an adsorption element in which the thickness of the base material layer is greater than the thickness of the breathable layer may be an adsorption element in which the thickness of the base material layer is greater than the thickness of the first breathable layer and greater than the thickness of the second breathable layer.

[0026] In this adsorption element, the thickness of the base material layer is greater than that of the breathable layer, making it possible to retain a sufficient amount of the metal-organic framework in the base material layer, and also shortening the path that the target passes through when the target passes through the breathable layer and is adsorbed onto the metal-organic framework by the adsorption element.

[0027] An adsorption element according to a ninth aspect is the adsorption element of any one of the first aspect to the eighth aspect, wherein the content of the metal organic framework per unit area as viewed in the thickness direction of the substrate layer is 70 wt % or more.

[0028] In this adsorption element, the content of the metal organic framework is large, so that it is possible to ensure a sufficient amount of the adsorption target.

[0029] An adsorption element according to a tenth aspect is the adsorption element according to any one of the first to ninth aspects, wherein the base material layer is formed in a corrugated shape.

[0030] In this adsorption element, the amount of the substrate layer that can be accommodated per unit volume can be increased, so that it is possible to ensure a sufficient amount of the object to be adsorbed.

[0031] A humidity control apparatus according to an eleventh aspect includes the adsorption element according to any one of the first to tenth aspects, and regeneration means. The regeneration means desorbs moisture adsorbed by the adsorption element from the adsorption element.

[0032] In this humidity control device, the regeneration means regenerates the adsorption element, so that the device can be used repeatedly.

[0033] A humidity control apparatus according to a twelfth aspect is the humidity control apparatus according to the eleventh aspect, further comprising a humidifying means. The humidifying means humidifies the target space by using moisture desorbed from the adsorption element.

[0034] This humidity control device is capable of dehumidifying and humidifying a target space.

[0035] An atmospheric water generator according to a thirteenth aspect includes the adsorption element according to any one of the first to tenth aspects, regeneration means, and condensation means. The regeneration means desorbs moisture adsorbed by the adsorption element from the adsorption element. The condensation means condenses the moisture desorbed from the adsorption element to generate condensed water.

[0036] This atmospheric water generator can prevent the metal-organic framework from entering the resulting condensed water. [Brief explanation of the drawings]

[0037] [Figure 1] FIG. 1 is a schematic cross-sectional view of an adsorption element (part 1). [Figure 2] FIG. 2 is a schematic cross-sectional view of the adsorption element (part 2). [Figure 3] FIG. 3 is a cross-sectional schematic diagram of the adsorption element (part 3). [Figure 4] FIG. 2 is an external perspective view of a rotor. [Figure 5] FIG. [Figure 6] FIG. 1 is a schematic external view of an air conditioning apparatus. [Figure 7] FIG. 1 is a schematic diagram of an air conditioning device. [Figure 8] FIG. [Figure 9] FIG. 2 is an explanatory diagram of regions of the humidification rotor when viewed from above. [Figure 10] FIG. 1 is a schematic external view of an atmospheric water generator. DETAILED DESCRIPTION OF THE INVENTION

[0038] (1) Adsorption element The adsorption element includes a substrate layer in which a fibrous structure and a metal-organic framework are mixed.

[0039] The adsorption element may have only one base material layer, or may have two base material layers, for example, by providing base material layers on both sides of a support layer that is a fibrous structure such as pulp paper.

[0040] (1-1) Base material layer The substrate layer is a composite of fibers and a metal organic framework, in which a fiber structure in which fibers are integrated with a metal organic framework containing metal ions and organic ligands is mixed.

[0041] (1-1-1) Fiber Examples of the fibers constituting the fiber structure include pulp fibers, resin fibers, glass fibers, and carbon fibers, and one or more of these may be used in combination.

[0042] When a regeneration process is performed in which moisture adsorbed in an adsorption element is desorbed by heating the adsorption element or by supplying heated air to the adsorption element, the fiber of the fiber structure is preferably a heat-resistant fiber with excellent heat resistance. Heat-resistant fibers preferably do not change shape in an atmosphere of 150°C, more preferably do not change shape in an atmosphere of 250°C, and even more preferably do not change shape in an atmosphere of 300°C. Furthermore, when the fiber has a glass transition temperature, the glass transition temperature is preferably 150°C or higher, more preferably 250°C or higher, and even more preferably 300°C or higher. Examples of such heat-resistant fibers include resin fibers, glass fibers, and carbon fibers. Examples of resin fibers include aromatic polyamide resin fibers, polybenzazole resin fibers, and cellulose fibers. Aramid fibers are preferred as aromatic polyamide resin fibers. Poly-p-phenylenebenzobisoxazole fibers (PBO) are preferred as polybenzazole resin fibers.

[0043] The average fiber diameter of the fibers may be, for example, 0.1 μm or more and 100 μm or less, and preferably 1 μm or more and 10 μm or less. The average fiber diameter may be calculated as the number average fiber diameter by randomly selecting 50 fibers from an image of a scanning electron microscope photograph.

[0044] The average fiber length of the fibers is preferably, for example, 100 μm or more, and more preferably 300 μm or more. The average fiber length of the fibers is not particularly limited, but may be, for example, 600 μm or less. The average fiber length of the fibers can be calculated by measuring the lengths of 100 randomly selected fibers using a tabletop scanning electron microscope (JEOL Ltd., JCM-7000 NeoScope) and averaging the measured values. By using fibers with an average fiber length of 100 μm or more, the metal-organic framework can be easily entangled with the fibers. Furthermore, since the fibers are easily entangled with each other, the fibers are prevented from falling off from the base layer, and further, the metal-organic framework, which is sandwiched and held between multiple fibers, is also prevented from falling off from the base layer.

[0045] (1-1-2) Metal-organic framework The metal-organic framework is sandwiched between fibers and held by the fibrous structure in the base material layer. Because the metal-organic framework is held by the fibrous structure by being sandwiched between fibers, it is suppressed from falling off from the base material layer. Furthermore, because the metal-organic framework is held by the fibrous structure by being sandwiched between fibers and held not only on the surface of the fibrous structure but also inside the fibrous structure, it is suppressed that the metal-organic framework held inside the fibrous structure falls off from the adsorption element. Furthermore, because the metal-organic framework is held by the fibrous structure by being sandwiched between fibers and held not only on the surface of the fibrous structure but also inside the fibrous structure, it is possible to increase the amount carried by the base material layer. Note that, in the base material layer, it is preferable that the amount of metal-organic frameworks held by the fibrous structure by being sandwiched between fibers is greater than the amount of metal-organic frameworks attached to the fiber surfaces without being sandwiched between fibers, and it is preferable that the total weight in a dry state of the metal-organic frameworks held by the fibrous structure by being sandwiched between fibers is greater than the total weight in a dry state of the metal-organic frameworks attached to the fiber surfaces without being sandwiched between fibers.

[0046] The method for sandwiching the metal-organic framework between fibers is not particularly limited, and examples thereof include a method in which both the fibers and the metal-organic framework are dispersed in water, an organic solvent, or the like, and the dispersion is papered to obtain a sheet-like material.

[0047] Metal-organic frameworks (MOFs) are porous materials with extremely large specific surface areas obtained by the reaction of metal ions with organic ligands. Hereinafter, metal-organic frameworks are also referred to as porous coordination polymers (PCPs). In metal-organic frameworks, organic ligands link metal ions, resulting in polymer structures with countless openings inside. The opening size and topology of metal-organic frameworks can be adjusted by selecting and combining metal ions and organic ligands. By selecting and combining metal ions and organic ligands, the opening size of metal-organic frameworks can be adjusted, enabling them to selectively adsorb targets.

[0048] The metal ions for forming the metal organic framework can be selected according to the target structural design. For example, Mg 2+ , Ca 2+ , Ti 4+ , Zr 4+ , Hf 4+ , V 4+ , Co 2+ , Ni 2+ , Cu 2+ , Zn 2+ , Al 3+ , Mn 2+ , Fe 2+ , Fe 3+ , Cr 3+ , Cr 6+ One or more selected from the group consisting of:

[0049] The organic ligand for forming the metal-organic framework may be selected depending on the target structural design, and examples thereof include carboxylate anions, amine compounds, sulfonate anions, phosphate anions, heterocyclic compounds, etc. Examples of carboxylate anions include anionic dicarboxylic acids, tricarboxylic acids, and tetracarboxylic acids. More specifically, examples of carboxylate anions include terephthalic acid, isophthalic acid, fumaric acid, trimesic acid, citric acid, malic acid, trimellitic acid, pyromellitic acid, oxalic acid, and derivatives thereof. Examples of heterocyclic compounds include bipyridine, imidazole, adenine, pyrazole, triazole, tetrazole, and derivatives thereof. One or more organic ligands can be used.

[0050] Some metal-organic frameworks have excellent moisture adsorption properties, and are preferably used as moisture-absorbing materials.

[0051] The metal organic framework is superior in the amount of water adsorbed per unit volume compared to zeolites such as zeolite 13x, and among these, MOF-801 and MOF-303 are preferred in terms of their particularly superior water adsorption capacity.

[0052] Furthermore, metal organic frameworks are superior in water adsorption speed compared to zeolites such as zeolite 13x, and among them, MIL-100(Fe) and MOF-801 are particularly preferred in terms of their superior water adsorption speed.

[0053] Furthermore, compared to zeolites such as zeolite 13x, the metal organic framework has superior durability in that the decrease in the amount of adsorption is suppressed when used with repeated adsorption and desorption of water.

[0054] Metal-organic frameworks are superior in that they have a specific heat capacity that is equal to or smaller than that of zeolites such as zeolite 13x, and can reduce the energy required for heating and regeneration to desorb adsorbed water. Among these, MIL-101(Cr), MOF-801, and MOF-74(Mg) are preferred because of their particularly small specific heat capacity.

[0055] Furthermore, metal organic frameworks are superior in that they have the same or smaller water adsorption energy than zeolites such as zeolite 13x, and can reduce the energy required to desorb the adsorbed water. Among these, MOF-801 and MIL-100(Fe) are preferred because they have particularly small water adsorption energies.

[0056] When the metal-organic framework is used after being regenerated by heating to desorb the adsorbed moisture, MOF-303 is preferred in terms of excellent heat resistance. When the metal-organic framework is used after being regenerated by heating, the ambient temperature of the metal-organic framework is preferably 70°C or higher, and more preferably 100°C or higher, in terms of excellent regeneration efficiency. When the metal-organic framework is used after being regenerated by heating, the ambient temperature of the metal-organic framework is preferably 300°C or lower, preferably 250°C or lower, and more preferably 130°C or lower, in terms of minimizing deterioration of the metal-organic framework.

[0057] The above MOF-801 is [Zr6(O)4(OH)4(fumarate)6] n MOF-303 can be expressed as [AI(OH)(3,5-pyrazoledicarboxylate)(HO)] nMIL-100(Fe) can be expressed as Fe3O(H2O)2OH(C6H3(COO)3)2. MIL-101(Cr) can be expressed as Cr3O(OH)(H2O)2(C6H4(COO)2)3.

[0058] The form of the metal-organic framework is not particularly limited, and may be, for example, a powder, pellet, or film. The average particle size of the metal-organic framework may be, for example, 0.01 μm or more and 100 μm or less, and preferably 0.1 μm or more and 10 μm or less. The average particle size is measured, for example, as D50, which is the particle size corresponding to 50% of the cumulative particle size from the smallest diameter side, using a laser diffraction / scattering particle size distribution measurement method.

[0059] Note that, from the viewpoint of ensuring a sufficient amount of the adsorption target, the content of the metal-organic framework per unit area as viewed in the thickness direction of the base material layer is preferably 70% by weight or more, and more preferably 75% by weight or more, of the base material layer in a dry state.

[0060] (1-1-3) Optional components of the base layer In the base material layer, a binder may be used to increase the bonding strength between the fibers or between the fibers and the metal organic framework. Such a binder can be used, for example, by dissolving the fibers and the metal organic framework in a dispersion in water, an organic solvent, or the like, and then papering the dispersion to obtain a sheet-like material.

[0061] As the binder, organic binders and inorganic binders can be used. However, when an inorganic binder is used, the metal-organic framework may be deteriorated by heating during curing, so an organic binder is preferably used. Examples of organic binders include polyacrylamide, ammonium carboxymethyl cellulose, carboxymethyl cellulose, cellulose nanofiber, polyethyleneimine, polyamide epichlorohydrin, urea-formaldehyde resin, melamine-formaldehyde resin, polyvinylamine, and polyvinyl alcohol. Since the metal-organic framework is held in the fiber structure by being sandwiched between the fibers, even if an organic binder is used, its amount can be kept small. This also prevents the countless openings of the metal-organic framework from being covered with the organic binder.

[0062] Furthermore, from the viewpoint of suppressing a decrease in the adsorption capacity of the metal-organic framework, it is preferable to use a binder having a larger opening diameter than the metal-organic framework. Specifically, it is preferable that the average shortest dimension of the binder is larger than the average opening diameter of the metal-organic framework. The average shortest dimension of the binder can be calculated, for example, using the bond length and van der Waals radius determined from the structural formula of the binder. Furthermore, the average opening diameter of the metal-organic framework can be determined by performing single crystal structure analysis or Rietveld analysis of a diffraction pattern determined by an X-ray diffractometer.

[0063] In addition, binders used to increase the bonding strength between fibers are preferably those that form hydrogen bonds with fibers, or ionic polymers such as anionic polymers, cationic polymers, and amphoteric polymers, from the viewpoint of acting on fiber aggregation. Examples of binders that form hydrogen bonds with fibers include polyacrylamide, urea resin, melamine resin, modified starch, polyvinyl alcohol, hydroxypropyl cellulose, cellulose nanofiber, polyvinylpyrrolidone, polyethylene glycol, polyethylene oxide, and polyvinylamide. Examples of anionic polymers include carboxymethyl cellulose, polyacrylic acid, and anionic polyvinyl alcohol. Examples of cationic polymers include polyethyleneimine, cationic polyvinyl alcohol, cationized starch, polydiallyldimethylammonium chloride, polyamidepolyamine epichlorohydrin, polyvinylamine, polyallylamine, and chitosan. In particular, when cellulose fibers are used as the fibers, it is preferable to use binders that form hydrogen bonds or ionic polymers.

[0064] (1-2) Breathable layer From the viewpoint of preventing the metal-organic framework held by the fiber structure from falling off, it is preferable that an air-permeable layer is laminated on the base material layer. The air-permeable layer is configured so as not to completely cover one surface of the base material layer, so that air containing the adsorption target can pass through the air-permeable layer and reach the base material layer.

[0065] The breathable layer may be provided on only one side of the substrate layer in the thickness direction, or on both sides. Specifically, as shown in the cross-sectional views of the adsorption element 30 in Figures 1 and 2, the breathable layer 32 may be provided on only one side of the substrate layer 31, or as shown in the cross-sectional view of the adsorption element 30 in Figure 3, the first breathable layer 32 may be provided on one side of the substrate layer 31 and the second breathable layer 33 may be provided on the other side. When breathable layers are provided on both sides of the substrate layer, the materials and thicknesses of the breathable layers may be the same or different.

[0066] The breathable layer preferably does not contain a metal-organic framework, and even if it does contain a metal-organic framework, the content of the metal-organic framework per unit area as viewed in the stacking direction is preferably less than that of the base material layer, and more preferably 1 / 5 or less of that of the base material layer.

[0067] The thickness of the breathable layer is preferably thinner than that of the substrate layer. When breathable layers are provided on both sides of the substrate layer, the thickness of each breathable layer is preferably thinner than that of the substrate layer. This makes it easier for a fluid such as air containing the adsorption target to reach the metal-organic framework of the substrate layer, thereby increasing the amount of adsorption by the metal-organic framework.

[0068] Such a breathable layer is not particularly limited, and may be composed of, for example, cellulose acetate, ethyl cellulose, cellulose nanofiber, acrylic polymer, etc., or may be composed of a fiber structure made of fibers similar to the fibers of the base layer, such as pulp fibers or cellulose fibers.

[0069] The breathable layer can be provided by spray coating onto the base layer by spray coating or the like, or by impregnating the base layer in a solution of the components that constitute the breathable layer and then dip-coating it, etc. When the breathable layer is provided by spray-coating or dip-coating a polymer onto the base layer, it is preferable to use a polymer whose average shortest dimension is larger than the average opening size of the metal-organic framework, from the viewpoint of suppressing a decrease in the adsorption ability of the metal-organic framework.

[0070] (1-3) Form The form of the adsorption element having the base material layer is not particularly limited, and may be, for example, a sheet-like form, or may be a roll-like rotor 52 in which a sheet-like adsorption element is wound up as shown in FIG.

[0071] In order to increase the contact area with the object to be adsorbed, the adsorption element is preferably configured in a corrugated shape, as in the adsorption element 30 shown in Fig. 5. In addition, it is preferable to wind up the adsorption element configured in a corrugated shape to form the rotor 52 in a roll shape. [Example]

[0072] Examples of the adsorption element will be described below with reference to specific examples.

[0073] Example 1 49% by weight of pulp fiber (Artec), 1% by weight of polyacrylamide (ACROS ORGANICS, MW100,000), and 50% by weight of MIL-100 (Fe) (Atomis, AP0004) were dispersed in water, and this aqueous dispersion was made into paper using a hand-made papermaking method. It was then heated and dried at 90°C under pressure from above, and further heated and vacuum dried at 150°C to produce a paper with a thickness of 160 g / m. 2 PCP-containing mixed paper was obtained.

[0074] Example 2 The same method as in Example 1 was used except that MOF-801 (manufactured by Atomis, AP0005) was used as the PCP. 2 PCP-containing mixed paper was obtained.

[0075] Example 3 The same method as in Example 1 was used except that MOF-303 (manufactured by Atomis, AP0044) was used as PCP. 2 PCP-containing mixed paper was obtained.

[0076] Example 4 34% by weight of pulp fiber (Artec), 1% by weight of polyacrylamide (ACROS ORGANICS, MW100,000), and 65% by weight of MIL-100 (Fe) (Atomis, AP0004) were dispersed in water, and this aqueous dispersion was made into paper using a hand-made papermaking method. It was then heated and dried at 90°C under pressure from above, and further heated and vacuum dried at 150°C to produce a paper with a thickness of 165 g / m. 2PCP-containing mixed paper was obtained.

[0077] Example 5 The same method as in Example 4 was used except that MOF-801 (manufactured by Atomis, AP0005) was used as PCP, and the thickness was 160 g / m 2 PCP-containing mixed paper was obtained.

[0078] Example 6 The same method as in Example 4 was used except that MOF-303 (manufactured by Atomis, AP0044) was used as the PCP. 2 PCP-containing mixed paper was obtained.

[0079] Example 7 24% by weight of pulp fiber (Artec), 1% by weight of polyacrylamide (ACROS ORGANICS, MW100,000), and 75% by weight of MIL-100 (Fe) (Atomis, AP0004) were dispersed in water, and this aqueous dispersion was made into paper using a hand-made papermaking method. It was then heated and dried at 90°C under pressure from above, and further heated and vacuum dried at 150°C to produce a paper with a thickness of 165 g / m. 2 PCP-containing mixed paper was obtained.

[0080] Example 8 The same method as in Example 7 was used except that MOF-801 (manufactured by Atomis, AP0005) was used as PCP, and the thickness was 170 g / m 2 PCP-containing mixed paper was obtained.

[0081] Example 9 The same method as in Example 7 was used except that MOF-303 (manufactured by Atomis, AP0044) was used as the PCP. 2 PCP-containing mixed paper was obtained.

[0082] Example 10 49% by weight of cellulose fiber (Daicel FineChem, Celish KY100G), 1% by weight of polyacrylamide (ACROS ORGANICS, MW100,000), and 50% by weight of MOF-801 (Atomis, AP0005) were dispersed in water, and this aqueous dispersion was made into paper using a hand-made papermaking method. It was then heated and dried at 120°C under pressure from above to produce a paper with a thickness of 155 g / m. 2 PCP-containing mixed paper was obtained.

[0083] Example 11 Aramid fiber (Tiara KY-400S, manufactured by Daicel FineChem) 49% by weight, polyacrylamide (MW100,000, manufactured by ACROS ORGANICS) 1% by weight, and MOF-801 (AP0005, manufactured by Atomis) 50% by weight were dispersed in water, and this aqueous dispersion was made into paper using a hand-made papermaking method. It was then heated and dried at 90°C under pressure from above, and further heated and vacuum dried at 150°C to produce a paper with a thickness of 160 g / m. 2 PCP-containing mixed paper was obtained.

[0084] Example 12 The same method as in Example 1 was used, except that ammonium CMC (manufactured by Daicel FineChem, CMC Daicel DN800H) was used as the binder. 2 PCP-containing mixed paper was obtained.

[0085] Example 13 The same method as in Example 1 was used, except that cellulose nanofiber (manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Rheocrysta I-2AX) was used as the binder. 2 PCP-containing mixed paper was obtained.

[0086] Example 14 The same method as in Example 1 was used except that polyethyleneimine (manufactured by Junsei Chemical Co., Ltd., polyethyleneimine 70000) was used as the binder. 2 PCP-containing mixed paper was obtained.

[0087] Example 15 The same method as in Example 1 was used except that polyamide epichlorohydrin (WS4020, manufactured by Seiko PMC Co., Ltd.) was used as the binder. 2 PCP-containing mixed paper was obtained.

[0088] Example 16 50% by weight of pulp fiber (Artec) and 50% by weight of MIL-100 (Fe) (Atomis, AP0004) were dispersed in water, and this aqueous dispersion was made into paper by hand-making. The paper was then heated and dried at 90°C under pressure from above, and further heated and vacuum dried at 150°C to a thickness of 160 g / m. 2 PCP-containing mixed paper was obtained.

[0089] (Comparative Example 1) MIL-100(Fe) (synthetic product of Atomis, AP0004) was ultrasonically dispersed in distilled water, and polyacrylamide (manufactured by ACROS ORGANICS, MW 100,000) was added to prepare a 30 wt% MIL-100(Fe) / 0.6 wt% polyacrylamide dispersion. Pulp paper (manufactured by Advantec, rectangular qualitative filter paper 5B) was immersed in the dispersion with stirring for 30 minutes, removed, and then vacuum dried at 150°C. This procedure was repeated until the PCP content reached 50 wt%.

[0090] (Comparative Example 2) Polyacrylamide (ACROS ORGANICS, MW 100,000) was dissolved in distilled water with stirring, and MIL-100(Fe) (Atomis Synthetic, AP0004) was added and ultrasonically dispersed to prepare a 20 wt% MIL-100(Fe) / 0.4 wt% polyacrylamide dispersion. This dispersion was sprayed onto pulp paper (Advantec, rectangular qualitative filter paper 5B) and vacuum dried at 150 °C. This process was repeated until the PCP content reached 50 wt%.

[0091] (Powder support evaluation) Each adsorption element was placed in a stainless steel container and tapped up and down and left and right 10 times to evaluate the amount of PCP powder that fell off by weight. The supportability was evaluated as the ratio of the amount of powder that fell off to the amount of support (wt%), and was divided into the following stages: Rating 1: 100-50 (weight%) Rating 2: 50-20 (weight%) Rating 3: 20-5 (wt%) Rating 4: 5-2 (wt%) Rating 5: 2 to 0 (weight%)

[0092] Table 1 shows the details of the adsorption elements of Examples 1 to 16 and the evaluation of their powder carrying capacity. [Table 1]

[0093] As shown in Table 1 above, it was confirmed that, compared to Example 1, Comparative Examples 1 and 2, which were prepared under similar conditions, had poor supportability of the metal organic framework.

[0094] Example 17 99% by weight of pulp fiber (manufactured by Artec Co., Ltd.) and 1% by weight of polyacrylamide (manufactured by ACROS ORGANICS, MW 100,000) were dispersed in water, and this aqueous dispersion was made into paper using a hand-made papermaking method. It was then heated and dried at 120°C under pressure from above to produce a paper with a thickness of 80 g / m. 2 Separately, 34% by weight of pulp fiber (manufactured by Artec Co., Ltd.), 1% by weight of polyacrylamide (manufactured by ACROS ORGANICS, MW 100,000), and 65% by weight of MOF-801 (synthesized by Atomis, AP0005) were dispersed in water, and this aqueous dispersion was made into paper using a handmade mesh on which Layer-A paper had been placed in advance. The paper was then heated and dried at 90°C while applying pressure from above, and further heated and vacuum dried at 150°C to obtain a paper with a thickness of 240 g / m. 2 A two-layer mixed paper was obtained.

[0095] Example 18 29% by weight of pulp fiber (manufactured by Artec Co., Ltd.), 1% by weight of polyacrylamide (manufactured by ACROS ORGANICS, MW 100,000), and 75% by weight of MOF-801 (synthetic product by Atomis, AP0005) were dispersed in water, and this aqueous dispersion was made into paper using a handmade mesh on which Layer-A paper had been laid in advance. The paper was then heated and dried at 90°C while applying pressure from above, and further heated and vacuum dried at 150°C to produce a paper with a thickness of 245 g / m. 2 A two-layer mixed paper was obtained.

[0096] Example 19 79% by weight of pulp fiber (manufactured by Artec Co., Ltd.), 1% by weight of polyacrylamide (manufactured by ACROS ORGANICS, MW 100,000), and 20% by weight of MOF-801 (synthesized by Atomis, AP0005) were dispersed in water, and this aqueous dispersion was made into paper using a hand-made papermaking method. It was then heated and dried at 120°C under pressure from above to produce a paper with a thickness of 85 g / m. 2 Separately, 19% by weight of pulp fiber (manufactured by Artec Co., Ltd.), 1% by weight of polyacrylamide (manufactured by ACROS ORGANICS, MW 100,000), and 80% by weight of MOF-801 (synthesized by Atomis, AP0005) were dispersed in water, and this aqueous dispersion was made into paper using a handmade mesh on which Layer-B paper had been placed in advance. The paper was then heated and dried at 150°C under pressure from above to obtain a thickness of 245 g / m. 2 A two-layer mixed paper was obtained.

[0097] Example 20 54% by weight of pulp fiber (manufactured by Artec Co., Ltd.), 1% by weight of polyacrylamide (manufactured by ACROS ORGANICS, MW 100,000), and 45% by weight of MOF-801 (synthesized by Atomis, AP0005) were dispersed in water, and this aqueous dispersion was made into paper using a hand-made papermaking method. It was then heated and dried at 120°C under pressure from above to produce a paper with a thickness of 85 g / m. 2Separately, 14% by weight of pulp fiber (manufactured by Artec Co., Ltd.), 1% by weight of polyacrylamide (manufactured by ACROS ORGANICS, MW 100,000), and 85% by weight of MOF-801 (synthesized by Atomis, AP0005) were dispersed in water, and this aqueous dispersion was made into paper using a handmade mesh on which Layer-C paper had been placed in advance. The paper was then heated and dried at 90°C while applying pressure from above, and further heated and vacuum dried at 150°C to obtain a paper with a thickness of 255 g / m. 2 A two-layer mixed paper was obtained.

[0098] The layer papers used in Examples 17 to 20 are shown in Table 2. [Table 2]

[0099] Table 3 shows the details of the adsorption elements of Examples 17 to 20 and the evaluation of their powder carrying capacity. [Table 3]

[0100] Example 21 Cellulose nanofibers (Dai-ichi Kogyo Seiyaku Co., Ltd., Rheocrysta I-2AX) were stirred and diluted with distilled water to prepare a 0.5 wt% cellulose nanofiber solution. This solution was placed in a spray bottle and sprayed onto the surface of the PCP-containing mixed paper prepared in Example 7, followed by vacuum drying at 150°C. This procedure was repeated until the coating amount was adjusted to 2 wt%.

[0101] Example 22 Cellulose acetate (manufactured by Wako Pure Chemical Industries, Ltd.) was dissolved in acetone with stirring to prepare a 5 wt% cellulose acetate solution. This dispersion was placed in a spray bottle and spray-coated onto the surface of the PCP-containing mixed paper prepared in Example 8, followed by vacuum drying at 150°C. This procedure was repeated until the coating amount was adjusted to 5 wt%.

[0102] Example 23 Ethyl cellulose (Ethocel STD100, manufactured by Nisshin Chemical Industry Co., Ltd.) was dissolved in methanol with stirring to prepare a 5 wt% solution of ethyl cellulose. This dispersion was placed in a spray bottle and spray-coated onto the surface of the PCP-containing mixed paper prepared in Example 9, followed by vacuum drying at 150°C. This procedure was repeated until the coating amount reached 5 wt%.

[0103] Table 4 shows the details of the adsorption elements of Examples 21 to 23 and the evaluation of their powder carrying capacity. [Table 4]

[0104] As shown in Table 4, it was confirmed that by applying a coating to the surface of the PCP-containing mixed paper, the powder carrying capacity was improved significantly.

[0105] (2) Humidity control device An air conditioner 1 will be described below as an example of an embodiment of a moisture absorber using an adsorption element.

[0106] (2-1) Air conditioning equipment Fig. 6 shows a schematic external view of the air conditioner 1. Fig. 7 shows a schematic configuration diagram of the air conditioner 1.

[0107] The air conditioner 1 is a pair-type air conditioner in which one outdoor unit 11 and one indoor unit 12 are connected via liquid refrigerant piping 17, gas refrigerant piping 18, and air supply and exhaust duct 15. This air conditioner 1 has a refrigerant circuit 10 configured by connecting the outdoor unit 11 and the indoor unit 12 via the gas refrigerant piping 18 and liquid refrigerant piping 17. In addition, the air supply and exhaust duct 15 connects the humidifying unit 50 in the outdoor unit 11 and the indoor unit 12.

[0108] The air conditioner 1 is capable of performing cooling operation, heating operation, dehumidifying operation, humidifying operation, air supply operation, exhaust operation, etc. However, the air conditioner is not limited to this, and may be, for example, a multi-type air conditioner in which multiple indoor units are connected in parallel to one outdoor unit.

[0109] (2-2) Indoor unit configuration The indoor unit 12 is, for example, a wall-mounted indoor unit that is installed on a wall surface or the like inside a room. The indoor unit 12 also includes an indoor unit casing 16, an indoor heat exchanger 13, and an indoor fan 14. The indoor heat exchanger 13 and the indoor fan 14 are housed in the indoor unit casing 16.

[0110] The indoor unit casing 16 has a generally rectangular parallelepiped shape extending in the left-right direction, and has an air intake port 16a provided at the top and an air outlet port 16b provided at the bottom front.

[0111] The indoor heat exchanger 13 has a plurality of heat transfer tubes connected to each other and a plurality of fins inserted and fixed to the plurality of heat transfer tubes. The indoor heat exchanger 13 is an air heat exchanger that exchanges heat between the refrigerant flowing inside and the air passing outside.

[0112] The indoor fan 14 is, for example, a cross-flow fan that generates an airflow in a direction intersecting with the rotation axis by being driven to rotate. The indoor fan 14 draws indoor air into the indoor unit casing 16 and blows the air into the room after heat exchange with the indoor heat exchanger 13.

[0113] In the internal space of the indoor unit casing 16, in the air flow formed by the indoor fan 14, the indoor end of the air supply and exhaust duct 15 is connected to the part downstream of the air intake 16a and upstream of the indoor heat exchanger 13.

[0114] (2-3) Outdoor unit configuration The outdoor unit 11 is made up of an outdoor air conditioning unit 20 at the bottom and a humidifying unit 50 at the top.

[0115] (2-4) Outdoor air conditioning unit configuration The outdoor air conditioning unit 20 accommodates a compressor 21, a four-way switching valve 22 connected to the discharge side of the compressor 21, an accumulator 23 connected to the suction side of the compressor 21, an outdoor heat exchanger 24 connected to the four-way switching valve 22, an outdoor expansion valve 25 connected to the outdoor heat exchanger 24, and an outdoor fan 29 that supplies air to the outdoor heat exchanger 24. The outdoor expansion valve 25 is connected to a liquid refrigerant pipe 17 via a liquid shut-off valve 27. The four-way switching valve 22 is connected to a gas refrigerant pipe 18 via a gas shut-off valve 28. The outdoor air conditioning unit 20 is connected to the indoor unit 12 via the liquid refrigerant pipe 17 and the gas refrigerant pipe 18. Specifically, the liquid refrigerant pipe 17 is connected to one end of the indoor heat exchanger 13 in the indoor unit 12. The gas refrigerant pipe 18 is connected to the other end of the indoor heat exchanger 13 in the indoor unit 12.

[0116] (2-5) Humidification unit configuration Fig. 8 shows an exploded perspective view of the humidifying unit 50. Fig. 9 shows an explanatory diagram of the area of ​​the humidifying rotor 52 as viewed from above.

[0117] The humidifying unit 50 includes a humidifying unit casing 51, a humidifying rotor 52, a heater 60, an adsorption fan 55, a flow path switching device 53, and an intake / exhaust fan 54. The humidifying unit 50 is capable of exhausting air taken in from inside the room via the intake / exhaust duct 15 to the outside of the room, and is also capable of humidifying outdoor air taken in from outside the room and supplying the humidified air to the room via the intake / exhaust duct 15.

[0118] (2-5-1) Humidification unit casing The humidification unit casing 51 houses a humidification rotor 52, a heater 60, an intake / exhaust fan 54, a flow path switching device 53, an adsorption fan 55, and the like.

[0119] A moisture absorption outlet 51a and a first moisture absorption inlet 51b, each consisting of a plurality of slit-shaped openings, are provided side by side on the front surface of the humidification unit casing 51. The first moisture absorption inlet 51b is an opening through which air taken in from outside the humidification unit casing 51 passes in order to supply moist outdoor air to the humidification rotor 52. The moisture absorption outlet 51a is an opening for discharging air to the outside of the humidification unit casing 51 after the air has flowed through the moisture absorption flow path 58a and had moisture adsorbed by the adsorption region X, which is part of the humidification rotor 52.

[0120] The back surface of the humidification unit casing 51 is provided with a second moisture absorption inlet 51c and an air supply / exhaust port 51d, each consisting of a plurality of slit-shaped openings. Similar to the first moisture absorption inlet 51b, the second moisture absorption inlet 51c is an opening through which air is taken in from outside the humidification unit casing 51 to supply moist outdoor air to the adsorption region X of the humidification rotor 52. The air supply / exhaust port 51d is an opening through which outdoor air is taken into the humidification flow path 58b during humidification operation or air supply operation. The outdoor air that flows into the humidification flow path 58b passes through the cooling region Z, which is part of the humidification rotor 52, and is then heated by the heater 60. The air heated by the heater 60 passes through the heating region Y, which is another part of the humidification rotor 52, and flows toward the air supply / exhaust fan 54. During exhaust operation, air taken in from the indoor unit 12 and flowing through the air supply and exhaust duct 15 flows into the humidification flow path 58b in the humidification unit 50 and is exhausted to the outdoors via the air supply and exhaust port 51d.

[0121] (2-5-2) Humidification rotor The humidification rotor 52 has a generally cylindrical outer shape due to the rolled-up adsorption sheet. The adsorption sheet is composed of a flat sheet and a corrugated sheet stacked one on top of the other. The gap between the flat sheet and the corrugated sheet extends in the axial direction of the generally cylindrical humidification rotor 52. Both the flat sheet and the corrugated sheet of the adsorption sheet are composed of the adsorption element 30. As described above, the adsorption element 30 includes, for example, a base layer 31 formed by integrating a metal-organic framework and fibers, and a first breathable layer 32 and a second breathable layer 33 disposed to sandwich the base layer 31 in the thickness direction. The generally cylindrical humidification rotor 52 is rotatably supported about a shaft extending in the vertical direction and is rotationally driven by a rotor drive motor. The humidification rotor 52 is capable of adsorbing moisture from the air it comes into contact with and desorbing the adsorbed moisture by heating.

[0122] (2-5-3) Suction fan 55 The adsorption fan 55 is driven to rotate by an adsorption fan motor and generates a flow of air that passes through the adsorption region X of the humidification rotor 52 that does not face the heater 60. Specifically, the adsorption fan 55 generates a flow of air that is sucked in through the first moisture absorption inlet 51b and the second moisture absorption inlet 51c, flows through the moisture absorption flow path 58a, and is discharged to the outside through the moisture absorption outlet 51a.

[0123] (2-5-4) Heater The heater 60 is located above a portion of the humidification rotor 52 that is located within the humidification flow path 58b, and is disposed opposite the upper surface of the humidification rotor 52. The heater 60 heats the air that is sent to the humidification rotor 52 to remove moisture from the humidification rotor 52. The humidification rotor 52 is heated by the air that is sent to it, which has been heated by the heater 60.

[0124] The heater 60 has a plurality of heating wires as a heating element, and the air passing through the heater 60 is heated by the heating wires.

[0125] (2-5-5) Intake and exhaust fan The intake and exhaust fan 54 is disposed to the side of the humidification rotor 52, and by switching the flow path using the flow path switching device 53, it can be switched between a state in which it generates a flow of air that is taken in from outside and sent to the indoor unit 12, and a state in which it generates a flow of air that is taken in from inside the room into the indoor unit 12 and sent to the outdoors. The intake and exhaust fan 54 can be configured, for example, by a centrifugal fan such as a turbofan.

[0126] When supply and exhaust fan 54 sends air taken in from outside to indoor unit 12, it causes the outdoor air to flow from supply and exhaust port 51d into humidification flow path 58b, pass through humidification rotor 52, and then, as shown by arrow A1, generates an airflow that flows to indoor unit 12 via flow path switching device 53 and supply and exhaust duct 15. When supply and exhaust fan 54 exhausts indoor air from indoor unit 12 to the outdoors, it generates an airflow that flows from indoor unit 12 to the outdoors via supply and exhaust duct 15 and humidification flow path 58b through supply and exhaust port 51d, as shown by arrow A2.

[0127] (2-5-6) Flow path switching device Flow path switching device 53 is disposed between intake and exhaust fan 54 and intake and exhaust duct 15. Flow path switching device 53 can switch the connection state between intake and exhaust fan 54 and intake and exhaust duct 15 between a supply state in which humidification flow path 58b is connected to intake and exhaust duct 15, and a supply stop state in which humidification flow path 58b is disconnected from intake and exhaust duct 15. In the supply state, flow path switching device 53 can also switch the flow direction of air passing through intake and exhaust duct 15.

[0128] In the supply state, air is permitted to flow from the humidification flow path 58b to the air supply / exhaust duct 15, or from the air supply / exhaust duct 15 to the humidification flow path 58b. Therefore, in the supply state, it is possible to switch between a state in which air that flows through the humidification flow path 58b and is blown out from the air supply / exhaust fan 54 flows in the A1 direction in the air supply / exhaust duct 15, and a state in which air that passes through the indoor unit 12 through the air supply / exhaust duct 15 in the A2 direction and is drawn into the air supply / exhaust fan 54 is sent to the humidification flow path 58b. By causing air to flow in the A1 direction with the rotation of the humidification rotor 52 stopped and the heater 60 stopped, an air supply operation can be performed in which outdoor air is taken into the room. Furthermore, by causing air to flow in the A2 direction with the rotation of the humidification rotor 52 stopped and the heater 60 stopped, an exhaust operation can be performed in which indoor air is exhausted to the outside.

[0129] In the supply-stop state, the flow of air from the humidification flow path 58b to the air supply / exhaust duct 15 or the flow of air from the air supply / exhaust duct 15 to the humidification flow path 58b is blocked. Therefore, in the supply-stop state, outdoor air is not supplied into the indoor unit 12, and air inside the indoor unit 12 is not exhausted to the outside.

[0130] (2-6) Air flow during humidification operation During humidification operation, in the humidification unit 50, the adsorption fan 55 is driven to cause air to flow through the moisture absorption flow path 58a in the direction of arrows A11-12, and the air supply / exhaust fan 54 is driven to cause air to flow through the humidification flow path 58b in the direction of arrows A21-23. During humidification operation, the humidification rotor 52 rotates in the direction of arrow R. Specifically, by rotating the humidification rotor 52 in the direction of arrow R, the portion of the humidification rotor 52 that was located in the adsorption region X moves to the heating region Y, the portion of the heating region Y moves to the cooling region Z, and the portion of the cooling region Z moves back to the adsorption region X, and this process is repeated.

[0131] The air taken in through the first moisture absorption inlet 51b and the second moisture absorption inlet 51c and flowing in the direction of arrow A11 passes through the adsorption region X of the humidification rotor 52 from bottom to top, and then heads toward the upper vicinity of the bell mouth 57. The moisture contained in the air taken in through the first moisture absorption inlet 51b and the second moisture absorption inlet 51c in this manner is adsorbed by the humidification rotor 52 as it passes through the adsorption region X of the humidification rotor 52.

[0132] The air that passes from near the top of the bell mouth 57 downward through the bell mouth 57 enters the adsorption fan 55 and is blown out from the adsorption fan 55, flows in the direction of arrow A12, and is discharged outside the room through the moisture absorption outlet 51a.

[0133] Air taken in through the air intake / exhaust port 51d and flowing in the direction of arrow A21 passes from bottom to top through cooling zone Z of the humidifying rotor 52 toward the heater 60. Outside air is supplied to cooling zone Z of the humidifying rotor 52, thereby cooling the humidifying rotor 52. Note that some of the moisture contained in the air passing through cooling zone Z of the humidifying rotor 52 may be adsorbed in cooling zone Z.

[0134] The air heated by the heater 60 flows in the direction of arrows A22-23, passing from top to bottom through the heating region Y of the humidification rotor 52, and heading toward the flow path switching device 53. Note that as the air heated by the heater 60 passes through the heating region Y of the humidification rotor 52, it desorbs moisture that had been adsorbed by the humidification rotor 52, becoming humidified air. The humidified air that has reached the flow path switching device 53 is then returned to the flow path switching device 53 via the supply and exhaust fan 54, and is sent to the indoor unit 12 via the supply and exhaust duct 15. This humidifies the room.

[0135] (2-7) Cooling operation, dehumidification operation, heating operation In the air conditioner 1 of this embodiment, cooling operation for cooling indoor air can be performed by driving the compressor 21 while the four-way selector valve 22 is switched so that the indoor heat exchanger 13 functions as a refrigerant evaporator and the outdoor heat exchanger 24 functions as a refrigerant condenser in the refrigerant circuit 10. In cooling operation, the indoor fan 14 and the outdoor fan 29 are driven and controlled.

[0136] Furthermore, by reducing or stopping the driving of the indoor fan 14 while maintaining the same refrigerant flow as during cooling operation, it is possible to perform a dehumidifying operation that reduces indoor humidity by causing condensation to occur on the surface of the indoor heat exchanger 13. This makes it possible for the air conditioning device 1 of this embodiment to perform humidifying and dehumidifying operations, thereby adjusting the indoor humidity.

[0137] In addition, in the refrigerant circuit 10, the four-way selector valve 22 is switched so that the indoor heat exchanger 13 functions as a refrigerant condenser and the outdoor heat exchanger 24 functions as a refrigerant evaporator, and the compressor 21 is driven to perform a heating operation for warming the indoor air. In the heating operation, the indoor fan 14 and the outdoor fan 29 are driven and controlled.

[0138] The cooling operation and the heating operation can be performed simultaneously with the humidifying operation, the air supply operation, and the exhaust operation. The dehumidifying operation can also be performed simultaneously with the air supply operation and the exhaust operation.

[0139] (2-8) Features of Air Conditioning Device 1 The air conditioning device 1 of this embodiment makes it possible to increase or decrease indoor humidity. This allows adjustment of indoor humidity. In particular, the degree of humidification can be adjusted by adjusting the heating level of the heater 60 and the airflow rate of the intake and exhaust fan 54. Here, even if the heating level of the heater 60 is increased, deterioration of the rotor and a decrease in its moisture absorption and desorption capacity are suppressed because the humidification rotor 52 is made of a heat-resistant material.

[0140] Furthermore, the air conditioner 1 can regulate not only the humidity in the room but also the temperature in the room.

[0141] In this air conditioner 1, the metal-organic framework carried by the base layer 31 of the humidifier rotor 52 is unlikely to fall off from the base layer 31, making it possible to prevent a decrease in humidifying function due to the falling off of the metal-organic framework. Furthermore, the metal-organic framework that has fallen off the humidifier rotor 52 is prevented from being sent into the room by the airflow. Furthermore, the odor that may be generated when the metal-organic framework that has fallen off the humidifier rotor 52 is heated by the heater 60 is prevented from being sent into the room.

[0142] (3) Atmospheric water generator An atmospheric water generator 100 will be described below as an example of an embodiment of an atmospheric water generator using an adsorption element.

[0143] (3-1) Schematic configuration of atmospheric water generator 100 FIG. 10 shows a schematic external view of the atmospheric water generator 100.

[0144] The atmospheric water generator 100 has a moisture absorption flow path 61, a moisture absorption fan 62, a rotor 91, a circulation circuit 71, a circulation fan 72, a heater 92, a water tank 93, a casing 101 that houses these, and a control device 99.

[0145] The moisture absorption flow path 61 is an air flow path that takes in outside air (OA) to absorb moisture into the rotor 91 and discharges the air after moisture absorption as exhaust air (EA). The moisture absorption flow path 61 has a cooling flow path 81a of the condenser 81. The air flowing through the cooling flow path 81a exchanges heat with the air flowing through the fresh water flow path 81b of the condenser 81 in the circulation circuit 71 without mixing with each other.

[0146] The moisture absorption fan 62 is a fan for generating an air flow in the moisture absorption flow path 61, and is provided downstream of the moisture absorption region S of the rotor 91 in the air flow direction.

[0147] The rotor 91 adsorbs moisture contained in the air flowing through the moisture absorption flow path 61 and releases the adsorbed moisture into the air flowing through the circulation circuit 71. The rotor 91 has a generally cylindrical outer shape due to the adsorption sheet being rolled up. The adsorption sheet is composed of a flat sheet and a corrugated sheet stacked one on top of the other. The gap between the flat sheet and the corrugated sheet extends in the axial direction of the generally cylindrical rotor 91. Both the flat sheet and the corrugated sheet of the adsorption sheet are composed of the adsorption element 30. As described above, the adsorption element 30 includes, for example, a base layer 31 formed by integrating a metal-organic framework and fibers, and a first breathable layer 32 and a second breathable layer 33 disposed to sandwich the base layer 31 in the thickness direction. The generally cylindrical rotor 91 is supported rotatably about an axis extending in the airflow direction and is driven to rotate by a rotor drive motor. The rotor 91 is capable of adsorbing moisture in the air that it comes into contact with, and is capable of desorbing the adsorbed moisture when heated. When the rotor 91 is rotated, the moisture absorption region S moves circularly to the moisture desorption region T, and the moisture desorption region T moves circularly to the moisture absorption region S. Air flowing through the moisture absorption flow path 61 passes through the moisture absorption region S. Air flowing through the circulation circuit 71 passes through the moisture desorption region T.

[0148] The circulation circuit 71 is a circuit for releasing moisture from the moisture release area T of the rotor 91 and supplying the moist air to the condenser 81 to produce moisture. The flow of air circulating through the circulation circuit 71 is generated by driving a circulation fan 72. The circulation circuit 71 has a freshwater production flow path 81b of the condenser 81. A heater 92 is provided in the circulation circuit 71 upstream of the moisture release area T of the rotor 91 and heats the air sent to the moisture release area T of the rotor 91. The heater 92 is provided upstream of the moisture release area T of the rotor 91. The downstream side of the moisture release area T of the rotor 91 is connected to the upstream side of the freshwater production flow path 81b of the condenser 81. A circulation fan 72 is provided downstream of the freshwater production flow path 81b of the condenser 81. The downstream side of the circulation fan 72 is connected upstream of the heater 92. A large number of openings (not shown) are formed at the lower end of the fresh water production flow path 81b of the condenser 81 to allow the generated condensed water to flow downward. A water tank 93 is provided below the fresh water production flow path 81b of the condenser 81. The condensed water that flows down through the openings at the lower end of the fresh water production flow path 81b of the condenser 81 is stored in the water tank 93.

[0149] The control device 99 is a computer including a memory such as a RAM or a ROM storing a predetermined program, and a processor such as a CPU. By executing the program, the control device 36 controls the rotation speed of the rotor 91, the heating amount of the heater 92, the airflow rate of the moisture absorption fan 62, and the airflow rate of the circulation fan 72. Here, the control device 99 can increase the amount of moisture desorbed from the rotor 91 by controlling the heater 92 to increase the heating amount. In addition, the control device 99 can increase the amount of condensed water obtained by controlling the circulation fan 72 to increase the airflow rate.

[0150] (3-2) Water production operation In the atmospheric water generator 100, the moisture absorption fan 62 and the circulation fan 72 are driven, the heater 92 generates heat, and the rotor 91 is driven to rotate, thereby generating water.

[0151] First, air (a) that flows into the moisture absorption flow path 61 from the outside air intake port of the atmospheric water generator 100 is heated by heat exchange with air flowing through the water production flow path 81b of the condenser 81 as it flows through the cooling flow path 81a of the condenser 81. Air (b) that has passed through the cooling flow path 81a of the condenser 81 is sent to the moisture absorption region S of the rotor 91, and the moisture contained therein is adsorbed by the rotor 91. Air (c) that has passed through the moisture absorption region S of the rotor 91 is drawn into the circulation fan 72 and blown out from the outside air exhaust opening of the atmospheric water generator 100 to the outside.

[0152] In the circulation circuit 71, dry air (d) is drawn into the circulation fan 72 and blown out from the circulation fan 72. The dry air (e) blown out from the circulation fan 72 is sent to the heater 92. The air (f) heated by the heater 92 is sent to the moisture release region T of the rotor 91, where it releases moisture adsorbed by the rotor 91. The high-temperature, humid air (g) that has passed through the moisture release region T of the rotor 91 exchanges heat with the air (a) flowing through the cooling channel 81a of the condenser 81 in the moisture absorption channel 61 as it flows through the freshwater production channel 81b of the condenser 81, thereby being cooled to below the dew point and producing condensed water. The condensed water produced in the freshwater production channel 81b of the condenser 81 flows down an opening provided below the freshwater production channel 81b and is stored in the water tank 93. The dry air (d) that has passed through the freshwater production channel 81b of the condenser 81 is drawn into the circulation fan 72 and circulates within the circulation circuit 71.

[0153] (3-3) Features of the atmospheric water generator 100 According to the atmospheric water generator 100 of this embodiment, water can be produced by collecting moisture contained in the air.

[0154] In this atmospheric water generator 100, the metal-organic frameworks included in the base layer 31 of the rotor 91 are unlikely to fall off from the base layer 31, thereby preventing a decrease in water production capacity due to the falling off of the metal-organic frameworks. Furthermore, the metal-organic frameworks that have fallen off the rotor 91 flow through the circulation circuit 71, and are therefore prevented from being mixed into the resulting condensed water.

[0155] (Addendum) Although the embodiments of the present disclosure have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the present disclosure as defined in the claims. [Explanation of symbols]

[0156] 1. Air conditioning equipment (humidity control equipment) 12 Indoor unit 15 Intake and exhaust duct (humidification means) 20 Outdoor air conditioning unit 30 Adsorption element 31 Base material layer 32 First breathable layer (breathable layer) 33 Second breathable layer (breathable layer) 50 Humidification unit 52 Humidification rotor 54 Intake / exhaust fan (humidification means) 60 Heater (regeneration means) 81 Condenser (condensation means) 91 Rotor 92 Heater (regeneration means) 100 Atmospheric Water Generator [Prior art documents] [Patent documents]

[0157] [Patent Document 1] Japanese Patent Application Publication No. 11-319461

Claims

1. The present invention comprises a substrate layer (31) in which a fiber structure in which fibers are integrated and a metal-organic framework containing metal ions and organic ligands are mixed, the metal-organic framework is sandwiched between the fibers and held by the fibrous structure, the substrate layer contains a binder having an opening diameter larger than the opening diameter of the metal-organic framework; Adsorption element (30).

2. The average fiber length of the fibers is 100 μm or more. The adsorption element according to claim 1 .

3. The binder forms hydrogen bonds or ionic bonds with the fibers. The adsorption element according to claim 1 or 2.

4. Further provided with breathable layers (32, 33) laminated on the base material layer, the breathable layer has a lower content of the metal organic framework per unit area as viewed in the stacking direction than the base material layer, or does not have the metal organic framework; The adsorption element according to claim 1 .

5. The breathable layer has a first breathable layer (32) and a second breathable layer (33), The base material layer is located between the first breathable layer and the second breathable layer. The adsorption element according to claim 4 .

6. The thickness of the base material layer is greater than the thickness of the breathable layer. The adsorption element according to claim 4 or 5.

7. the content of the metal organic framework per unit area as viewed in the thickness direction of the base material layer is 70% by weight or more; The adsorption element according to any one of claims 1 to 6.

8. The base material layer is formed in a corrugated shape. The adsorption element according to any one of claims 1 to 7.

9. An adsorption element according to any one of claims 1 to 8; a regeneration means (60) for desorbing the moisture adsorbed by the adsorption element from the adsorption element; A humidity control device (1) comprising:

10. Further provided is a humidifying means (54, 15) for humidifying the target space using moisture desorbed from the adsorption element. The humidity control device according to claim 9.

11. An adsorption element according to any one of claims 1 to 8; a regeneration means (92) for desorbing the moisture adsorbed by the adsorption element from the adsorption element; condensation means (81) for condensing the moisture desorbed from the adsorption element to generate condensed water; An atmospheric water generator (100) equipped with the above.

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