Absorption device

Abstract

To provide an absorption device capable of suppressing a gap between a wall surface of a casing and an absorbent, suppressing unevenness of gas flow inside the casing, and improving absorptivity in the vicinity of the wall surface.SOLUTION: An absorption device 10 includes: a casing 20 formed with at least a part of a gas flow path; a granular first absorbent 12 that is filled in the casing 20 and absorbs a specific substance contained in the gas; and a deformation member 30 that is arranged in an inside surface of the casing 20, and reduces a porosity between the inside surface of the casing 20 and the first absorbent 12 by deformation of a surface facing the first absorbent 12, where a second absorbent 14 is fixed to a surface facing at least the first absorbent 12.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an adsorption device. [Background technology]

[0002] Patent Document 1 discloses an evaporated fuel treatment device in which a gas passage formed inside a casing is filled with a granular adsorbent that adsorbs and desorbs evaporated fuel. In this evaporated fuel treatment device, a first adsorbent filled in the central portion of the passage cross section has a larger particle size than a second adsorbent filled in the outer peripheral portion of the casing. This promotes desorption of evaporated fuel in the central portion of the gas passage cross section compared to the outer peripheral portion of the passage cross section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-118896 Summary of the Invention [Problem to be solved by the invention]

[0004] Inside the casing, each adsorbent contacts the substantially flat wall of the casing. Therefore, the gap between the adsorbent and the wall of the casing is larger than the gap between the adsorbents themselves. This causes the gas introduced into the casing to flow more easily toward the inner circumferential surface, where pressure loss is lower, than toward the center of the casing, resulting in a problem of uneven gas flow within the casing. Furthermore, because the wall of the casing does not have adsorption performance, the adsorption performance near the wall of the casing is poor.

[0005] In consideration of the above problems, the present invention aims to provide an adsorption device that can reduce the gap between the wall surface of the casing and the adsorbent, prevent uneven gas flow within the casing, and improve adsorption performance near the wall surface. [Means for solving the problem]

[0006] The adsorption device described in claim 1 comprises a casing that forms at least a part of a gas flow path, a granular first adsorbent that is filled in the casing and adsorbs a specific substance contained in the gas, and a deformable member that is arranged on the inner surface of the casing and reduces the porosity between the inner surface of the casing and the first adsorbent by deforming the surface facing the first adsorbent, and has a second adsorbent that adsorbs the specific substance fixed to at least the surface facing the first adsorbent.

[0007] In the adsorption device described in claim 1, when a gas containing a specific substance passes through the casing, the first adsorbent adsorbs the specific substance contained in the gas as the gas passes between the particles of the first adsorbent. A deformable member is disposed on the inner surface of the casing. This deformable member reduces the porosity between the inner surface of the casing and the first adsorbent by deforming the surface facing the first adsorbent. This reduces the difference in pressure loss between the central and outer sides of the casing, thereby preventing uneven gas flow within the casing. Furthermore, a second adsorbent that adsorbs the specific substance is fixed to at least the surface of the deformable member facing the first adsorbent. Therefore, when gas passes between the inner surface of the casing and the first adsorbent, the second adsorbent adsorbs the specific substance contained in the gas, improving adsorption performance near the inner surface. In this way, the adsorption device described in claim 1 reduces gaps between the casing wall surface and the adsorbent, preventing uneven gas flow within the casing and improving adsorption performance near the wall surface.

[0008] The adsorption device according to a second aspect of the present invention has the configuration according to the first aspect, wherein the deformable member is formed of a sheet-like nonwoven fabric, and the second adsorption body is fixed to fibers of the nonwoven fabric.

[0009] In the adsorption device described in claim 2, the deformable member is formed of a sheet-like nonwoven fabric, and the second adsorbent is fixed to the fibers of the nonwoven fabric. This makes the deformable member breathable and allows the second adsorbent to be dispersed even inside the nonwoven fabric, thereby increasing the contact efficiency between the specific substance contained in the gas and the second adsorbent.

[0010] The adsorption device described in claim 3 has the configuration described in claim 1, wherein the deformable member is made of a sheet-like foam material having a plurality of pores formed therein, and the second adsorption body is fixed to the surface of the pores.

[0011] In the adsorption device described in claim 3, the deformable member is made of a sheet-like foam material, and the base 1 adsorbent is fixed to the surface of the pores of the foam material, which provides a sufficient surface area for the adsorption surface of the second adsorbent, thereby increasing the contact efficiency between the specific substance and the second adsorbent.

[0012] The adsorption device described in claim 4 has the configuration described in claim 1, in which the deformable member is formed of a sheet-shaped rubber plate, and a second adsorption body is fixed to the surface facing the first adsorption body.

[0013] In the suction device according to claim 4, the deformable member is formed from a sheet-like rubber plate and the second suction body is fixed to the surface thereof, so that the device can be implemented simply and at low cost.

[0014] An adsorption device according to a fifth aspect of the present invention has the configuration according to any one of the first to fourth aspects, wherein the particle size of the second adsorbent is smaller than the particle size of the first adsorbent.

[0015] In the adsorption device described in claim 5, the second adsorbent has a smaller particle size than the first adsorbent, so that deformation allowance for the deformable member can be secured, and the gap between the wall surface of the casing and the first adsorbent is effectively suppressed.

[0016] An adsorption device described in claim 6 has the configuration described in any one of claims 1 to 4, wherein the second adsorbent is a powdery metal organic framework.

[0017] In the adsorption device described in claim 6, by employing a metal-organic framework, which is easily synthesized into fine particles, as the second adsorbent, the dispersibility of the second adsorbent on the surface of the deformable member can be improved, and the contact efficiency with the specific substance can be increased. [Effects of the Invention]

[0018] As described above, the adsorption device according to the present invention has the effect of suppressing the gap between the wall surface of the casing and the adsorbent, suppressing uneven gas flow within the casing, and improving adsorption performance near the wall surface. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a vertical cross-sectional view of an adsorption device according to an embodiment of the present invention, showing a state in which an adsorption material is filled inside. FIG. [Figure 2] 2 is a partially enlarged view showing the vicinity of a wall surface of a casing of the adsorption device of FIG. 1. FIG. [Figure 3] 3 is a partially enlarged view corresponding to FIG. 2, showing a suction device according to a first modified example of the present embodiment. FIG. [Figure 4] 10 is a partially enlarged view corresponding to FIG. 2, showing a suction device according to a second modified example of the present embodiment. FIG. [Figure 5] FIG. 3 is a partially enlarged view corresponding to FIG. 2 and showing a suction device according to a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0020] An embodiment of an adsorption device according to the present invention will be described below with reference to Figs. 1 and 2. The adsorption device according to the present invention is configured such that a granular adsorbent is filled inside a casing that constitutes part of a gas flow path, and specific substances contained in the gas are adsorbed from the gas passing through the casing. An adsorption device 10 according to one embodiment will be described in detail below. In Figs. 1 and 2, the direction indicated by arrow H, which is appropriately shown in each figure, indicates the axial direction of a casing 20, which will be described later. Furthermore, in Fig. 2, the direction indicated by arrow F indicates the direction in which gas flows within the casing 20.

[0021] Unless otherwise specified in the specification, each element is not limited to one and may be present in plural. Furthermore, in the drawings, substantially identical elements are denoted by the same reference numerals, and redundant explanations in the specification will be omitted.

[0022] The adsorption device 10 is, for example, an evaporated fuel treatment device installed in a vehicle equipped with an internal combustion engine, and is also called a canister. The adsorption device 10 adsorbs and desorbs evaporated fuel (gasoline vapor, etc.) generated in the fuel tank of the vehicle.

[0023] Fig. 1 is a longitudinal cross-sectional view of an adsorption device 10 according to this embodiment, showing a state in which the adsorption device 10 is filled with an adsorbent. As shown in Fig. 1, the adsorption device 10 includes a casing 20 in the shape of a rectangular cylinder with a bottom, the interior of which is divided into multiple sections, and a lid 22 that closes an opening on one side of the casing 20 in the axial direction H (the opening on the upper side of the paper in Fig. 1). The casing 20 and the lid 22 are each made of a thermoplastic resin.

[0024] (Casing) The casing 20 has a partition wall 24 that divides the internal space of the casing 20 into approximately rectangular parallelepiped chambers. The partition wall 24 in this embodiment divides the internal space of the casing 20 into a main chamber 26 and an auxiliary chamber 28.

[0025] On the other side of the casing 20 in the axial direction H (the opening on the lower side of the paper in FIG. 1), a tank port 31, a purge port 32, and an atmospheric port 34 are formed side by side in the bottom wall of the casing 20. The atmospheric port 34 communicates with the sub-chamber 28 via a perforated plate 36 having a large number of fine openings. The tank port 31 and the purge port 32 communicate with the main chamber 26 via a perforated plate 38 also having a large number of fine openings.

[0026] A partition wall 41 is formed on the bottom wall portion of the casing 20 on the main chamber 26 side so as to protrude into the main chamber 26, and the partition wall 41 separates the internal space of the main chamber 26 that communicates with the tank port 31 from the internal space of the main chamber 26 that communicates with the purge port 32.

[0027] The tank port 31 communicates with the fuel tank via an evaporated fuel passage (not shown) and is configured to introduce evaporated fuel that has evaporated in the fuel tank into the adsorption device 10, i.e., into the main chamber 26. The purge port 32 communicates between the intake pipe of the engine (internal combustion engine) and the main chamber 26. The atmospheric port 34 communicates with the outside space and is configured to allow the atmosphere (air) to be introduced into the adsorption device 10.

[0028] (1st adsorbent) The main chamber 26 and the auxiliary chamber 28 of the casing 20 are filled with a first adsorbent 12. The first adsorbent 12 is made of activated carbon or the like capable of adsorbing and desorbing evaporated fuel as a specific substance. Activated carbon such as powdered activated carbon, crushed carbon, and granulated carbon can be used as the first adsorbent 12, but using powdered activated carbon may result in excessively high airflow resistance within the main chamber 26 and the auxiliary chamber 28. From this perspective, the first adsorbent 12 of this embodiment is made of granulated carbon with a particle size larger than that of powdered activated carbon.

[0029] The first adsorbent 12 is made of spherically shaped granulated carbon. The openings of the perforated plates 36 and 38 are set to a size smaller than the first adsorbent 12, and are configured to be able to hold the first adsorbent 12 within the main chamber 26 and the sub-chamber 28.

[0030] The opening of the main chamber 26 of the casing 20 is closed by an inner lid 42. Here, the configuration of the inner lid 42 is the same for the main chamber 26 and the auxiliary chamber 28, so only the configuration for the main chamber 26 will be described, and a description of the inner lid 42 for the auxiliary chamber 28 will be omitted. The inner lid 42 is a breathable lid composed of a filter 44 and a porous plate 46, and holds the first adsorbent 12 in the main chamber 26. The inner lid 42 is configured to be slidable along the inner circumferential surface of the casing 20, i.e., the circumferential surface of the main chamber 26, while closing the opening of the main chamber 26. One end of a coil spring 48 is attached to the center of the back surface of the inner lid 42, and the other end of the coil spring 48 is supported by the lid 22. Therefore, when the opening of the casing 20 is closed by the lid 22, the inner lid 42 receives a force from the coil spring 48 in a direction pushing it into the main chamber 26 (downward in FIG. 1 ). As a result, no unnecessary gaps are formed between the particles of the first adsorbent 12. Here, a communication chamber 50 formed between the lid 22 and the inner lid 42 that closes the main chamber 26 and the auxiliary chamber 28, respectively, allows communication between the main chamber 26 and the auxiliary chamber 28. In other words, the adsorption device 10 forms an inverted U-shaped flow path inside the casing 20.

[0031] 2 is a partially enlarged view showing the vicinity of the inner surface 21 that constitutes the wall surface of the main chamber 26 and the auxiliary chamber 28 of the casing 20. Here, the inner surface 21 of the side wall portion (reference numeral omitted) that stands in the axial direction from the outer peripheral end of the bottom wall portion of the casing 20 is shown. Note that the configuration of the inner surface 21 of the casing 20 is the same for the main chamber 26 and the auxiliary chamber 28, so only the case of the main chamber 26 will be described, and a description of the inner surface 21 of the auxiliary chamber 28 will be omitted.

[0032] (deformable member) As shown in Fig. 2, a sheet-like deformable member 30 is disposed on the inner surface 21 of the casing 20. The deformable member 30 shown in Fig. 2 is disposed along the inner surface 21 of the casing 20 extending in the ventilation direction (which coincides with the axial direction H of the casing 20). The deformable member 30 is formed of an elastic material that is deformable by the filling pressure input from the first adsorbent 12 to the deformable member 30 when the main chamber 26 and the auxiliary chamber 28 are filled with the first adsorbent 12. In one example of this embodiment, the deformable member 30 is made of a sheet-like nonwoven fabric having a predetermined thickness and is configured to have a predetermined breathability.

[0033] The deformable member 30 has a first side surface 30A as a surface facing the first adsorbent 12, and a second side surface 30B as a surface facing the inner surface 21 of the casing 20. The first side surface 30A deforms to conform to the surface shape of the first adsorbent 12, thereby preventing the gap D2 formed between the first adsorbent 12 and the first side surface 30A from becoming larger. This reduces the porosity between the inner surface 21 of the casing 20 and the first adsorbent 12 in the adsorption device 10. In this embodiment, the size of the gap D2 formed between the wall surface of the casing 20 and the first adsorbent 12 is equal to or smaller than the gap D1 between the particles of the first adsorbent 12. The second side surface 30B of the deformable member 30 is fixed to the inner side surface 21 of the casing 20 via an adhesive or the like.

[0034] (Second adsorbent) Here, a second adsorbent 14, which is different from the first adsorbent 12, is fixed to the deformable member 30. This second adsorbent 14 is capable of adsorbing evaporated fuel as a specific substance, and has the same adsorption performance as the first adsorbent 12.

[0035] 2 shows an enlarged view of a portion of the fibers 33 of the nonwoven fabric that constitutes the deformable member 30. As shown in this figure, the second adsorbents 14 are fixed to the fibers 33 of the nonwoven fabric that constitutes the deformable member 30 via an adhesive or the like. Therefore, the second adsorbents 14 are distributed on the first side surface 30A, the second side surface 30B, and inside the deformable member 30.

[0036] From the viewpoint of ensuring a deformation allowance for the first side surface 30A of the deformable member 30, the second adsorbent 14 preferably has a smaller particle size than the first adsorbent 12. As the second adsorbent 14, activated carbon such as powdered activated carbon, crushed carbon, and granulated carbon, or metal organic frameworks (MOFs) can be used, but the second adsorbent 14 of this embodiment is made of a powdered metal organic framework.

[0037] Metal-organic frameworks are materials formed by metal ions and organic ligands and have a highly regular lattice structure. Metal-organic frameworks can occlude (adsorb) microparticles within their lattice structure and separate them under specific conditions. Metal ions extracted from inorganic metal compounds, such as metal oxides and metal salts of zinc (Zn), copper (Cu), cobalt (Co), zirconium (Zr), etc., can be used. Organic ligands can also be used, such as those having functional groups capable of coordinating with metal atoms, such as carboxyl groups, imidazole groups, and amide groups.

[0038] The powder metal-organic framework has a small particle size of several hundred nanometers to several micrometers, making it suitable for fixing to the fibers of a nonwoven fabric and also suitable for ensuring sufficient deformation allowance of first side surface 30A of deformable member 30.

[0039] With the above configuration, part of the evaporated fuel (gas) passing near the inner surface 21 of the casing 20 passes through the inside of the deformable member 30 and is adsorbed by the second adsorbent 14 fixed to the fiber 33.

[0040] (Action and effect) As described above, in the adsorption device 10 according to this embodiment, when gas containing evaporated fuel passes through the casing 20, a specific substance contained in the gas is adsorbed by the first adsorbent 12 as the gas passes through the gaps D1 between the particles of the first adsorbent 12. Furthermore, in the adsorption device 10, by disposing the deformable member 30 on the inner surface 21 of the casing 20, the gap D2 between the inner surface 21 of the casing 20 and the first adsorbent 12 is reduced. This makes it possible to prevent the gas flow inside the casing 20 from becoming uneven, and also improves the adsorption performance near the inner surface 21.

[0041] Here, the relationship between the gap D2 and the non-uniformity of the gas flow inside the casing 20 will be described using a comparative example. Fig. 5 shows, as a comparative example, a partially enlarged view of an adsorption device 500 that does not have a deformable member 30 on the inner surface 504 of a casing 502 and is filled with a first adsorbent 12.

[0042] 5, in the adsorption device 500 according to the comparative example, individual particles of the first adsorbent 12 are in contact with the inner surface 504 of the substantially flat casing 502. In this state, the gap D2 between the first adsorbent 12 and the inner surface 504 of the casing 502 is larger than the gap D1 between adjacent first adsorbents 12. Therefore, the area where the inner surface 504 of the casing 502 and the first adsorbents 12 are in contact (the outer periphery of the casing) has a higher porosity than the area where the adjacent first adsorbents 12 are in contact (the center of the casing), and the airflow resistance (pressure loss) of the outer periphery is smaller than that of the center.

[0043] When evaporated fuel flows into such a gas flow path, most of the evaporated fuel passes through the outer periphery where the airflow resistance is low, causing the gas flow inside the casing 502 to become non-uniform. This may make it difficult to efficiently adsorb the evaporated fuel to the first adsorbent 12 located in the center of the casing 502. Furthermore, although most of the evaporated fuel passes through the outer periphery where the airflow resistance is low, the inner surface 504 of the casing 502 does not have adsorption performance, and therefore the adsorption performance near the inner surface 504 of the casing 502 is inferior to that of the center. The non-uniform gas flow inside the casing 502 may lead to a decrease in the adsorption performance of the entire adsorption device. Furthermore, when air flows into such a gas flow path, much of the air passes through the outer periphery of the casing 502, which has low air resistance, just as in the case of evaporated fuel, making it difficult to efficiently desorb the evaporated fuel from the first adsorbent 12 located in the center. These problems become more pronounced when the travel distance of the evaporated fuel and air within the flow passage of the casing 502 cannot be ensured sufficiently.

[0044] In contrast, in the adsorption device 10 according to this embodiment, a deformable member 30 is disposed on the inner surface 21 of the casing 20. The deformable member 30 reduces the porosity between the inner surface 21 of the casing 20 and the first adsorbent 12 by deforming the first side surface 30A facing the first adsorbent 12. This reduces the difference in pressure loss between the central side and the outer periphery of the casing 20, thereby preventing the gas flow inside the casing 20 from becoming uneven. Furthermore, the deformable member 30 has a second adsorbent 14 fixed to at least the first side surface 30A facing the first adsorbent 12. Therefore, when gas passes through the gap D2 between the inner surface 21 of the casing 20 and the first adsorbent 12, the second adsorbent 14 adsorbs the evaporated fuel contained in the gas, improving the adsorption performance near the inner surface 21. In this way, in the adsorption device 10 of this embodiment, the gap between the wall surface of the casing 20 and the first adsorbent 12 is reduced, which prevents the gas flow within the casing 20 from becoming uneven and improves the adsorption performance near the wall surface.

[0045] In this embodiment, the deformable member 30 is formed from a sheet-like nonwoven fabric, and the second adsorbent 14 is fixed to fibers 33 of the nonwoven fabric. This makes the deformable member 30 breathable, and the second adsorbent 14 can be dispersed even inside the nonwoven fabric, thereby increasing the contact efficiency between the evaporated fuel contained in the gas and the second adsorbent 14.

[0046] Furthermore, in this embodiment, the second adsorbent 14 has a smaller particle size than the first adsorbent, so that deformation allowance for the deformable member 30 can be secured, and the gap D2 between the inner surface 21 of the casing 20 and the first adsorbent 12 is effectively suppressed.

[0047] Furthermore, in this embodiment, by employing a metal-organic framework, which can be easily synthesized into fine particles, as the second adsorbent 14, the dispersibility of the second adsorbent 14 on the surface of the deformable member 30 can be improved, and the contact efficiency with the evaporated fuel can be increased.

[0048] Although the suction device 10 according to this embodiment has been described above, the present invention is not limited to this. Modifications of this embodiment are listed below. Each modification basically follows the configuration of the suction device 10 according to the above embodiment, and therefore can obtain the same functions and effects. Furthermore, in the illustrations of each modification, the same components as those in the above embodiment are assigned the same reference numerals, and their description will be omitted.

[0049] (First Modification) A first modified example of the adsorption device 10 will be described with reference to FIG. 3. In this first modified example, a deformable member 50 made of a foam material is disposed on the inner surface 21 of the casing 20. The deformable member 50 is formed by molding a foam material such as urethane, and is sheet-shaped with a plurality of pores 52 formed therein. The second adsorbent 14 is fixed to the surface of the pores 52 of the foam material via an adhesive or the like. As a result, the second adsorbent 14 is dispersed and disposed on the first surface 50A and second side surface 50B of the deformable member 50, and inside the surface layer portion of the deformable member 50. On the other hand, the second side surface 50B of the deformable member 50 (the surface facing the inner side surface 21 of the casing 20) is fixed to the inner side surface 21 of the casing 20 via an adhesive or the like.

[0050] According to the first modified example described above, the second adsorbent 14 is fixed to the surface of the pores 52 of the foam material, so that a sufficient surface area can be obtained as the adsorption surface of the second adsorbent 14, thereby increasing the contact efficiency between the evaporated fuel and the second adsorbent 14. In addition, even in the above-mentioned first modified example, it is preferable that the size of the gap D2 formed between the wall surface of the casing 20 and the first adsorbent 12 is equal to or smaller than the gap D1 between the particles of the first adsorbent 12.

[0051] (Second Modification) A second modified example of the adsorption device 10 will be described with reference to Fig. 4. In this second modified example, a deformable member 60 formed of a rubber plate is disposed on the inner surface 21 of the casing 20. The deformable member 60 is formed, for example, of a sheet-like rubber plate, and the second adsorption body 14 is fixed to a first side surface 60A, which is the surface facing the first adsorption body 12, via an adhesive or the like. Furthermore, a second side surface 60B, which is the surface facing the inner surface 21 of the casing 20, is fixed to the inner surface 21 of the casing 20 via an adhesive or the like.

[0052] According to the second modified example, the deformable member 60 is formed from a sheet-like rubber plate, and the second adsorptive body 14 is fixed to the surface thereof, which can be implemented simply and at low cost. In addition, in the above-mentioned second modified example, it is preferable that the size of the gap D2 formed between the wall surface of the casing 20 and the first adsorbent 12 is equal to or smaller than the gap D1 between the particles of the first adsorbent 12.

[0053] [supplementary explanation] Furthermore, in the present invention, the specific substance to be adsorbed by the first adsorbent 12 and the second adsorbent 14 is not limited to evaporated fuel, but may be, for example, gas such as oxygen, hydrogen, or carbon dioxide. Therefore, in the present invention, it is not essential that the adsorption device constitutes a fuel processing device. A gas purification device that produces a specific gas from a mixed gas in which multiple gases are mixed may also be configured. As an example, when the specific substance is oxygen, a gas purification device that purifies hydrogen gas from a mixed gas of oxygen and hydrogen can be cited. In this case, oxygen gas can be adsorbed from the mixed gas that has passed through the casing using the first adsorbent 12 and the second adsorbent 14, and hydrogen gas can be separated. In this case, at least one of the first adsorbent 12 and the second adsorbent 14 may be configured as a granular adsorbent formed of silica gel or the like. The adsorption device may also be an air purification device configured to purify the air by passing the air through a casing and adsorbing pollutants such as carbon dioxide. [Explanation of symbols]

[0054] 10 Adsorption device 12 First adsorbent 14 Second adsorbent 20 Casing 22 Inner surface 30 Deformable member 30A First side surface (surface facing the first adsorbent) 50 Deformable member 50A First side surface (surface facing the first adsorbent) 60 Deformable member 60A First side surface (surface facing the first adsorbent) D2 gap (gap between the inner surface of the casing and the first adsorbent)

Claims

1. a casing that defines at least a portion of a gas flow path; a granular first adsorbent filled in the casing and configured to adsorb a specific substance contained in the gas; an adsorption device having a deformable member that is arranged on the inner surface of the casing, reduces the porosity between the inner surface of the casing and the first adsorbent by deforming the surface facing the first adsorbent, and has a second adsorbent that adsorbs the specific substance fixed to at least the surface facing the first adsorbent.

2. the deformable member is formed of a sheet-like nonwoven fabric, and the second adsorption body is fixed to fibers of the nonwoven fabric. The adsorption device according to claim 1 .

3. the deformable member is formed of a sheet-like foam material having a plurality of pores formed therein, and the second adsorbent is fixed to the surface of the pores. The adsorption device according to claim 1 .

4. the deformable member is formed of a sheet-like rubber plate, and a second attraction body is fixed to the surface facing the first attraction body; The adsorption device according to claim 1 .

5. The particle size of the second adsorbent is smaller than the particle size of the first adsorbent. The adsorption device according to any one of claims 1 to 4.

6. the second adsorbent is a powder metal organic framework; The adsorption device according to any one of claims 1 to 4.

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