Adsorption device and drying furnace

Abstract

An adsorption device (10) is provided with a filter (40), a first frame (20), and a first sealing material (51). The filter (40) has a columnar shape having an adsorption carrier, and is rotatable about a central axis. The first frame (20) has a circular opening edge (OP) centered on the central axis of the filter (40). The first sealing material (51) is interposed between the filter (40) and the first frame (20). The first frame (20) has, on the outside of the opening edge (OP), an annular outer peripheral wall (26) centered on the central axis. The filter (40) has an annular first protruding wall (45) at a position facing the outer peripheral wall (26) in the direction along the central axis. The first sealing material (51) is in contact with the inner peripheral surface of the outer peripheral wall (26) and the inner peripheral surface of the first protruding wall (45).

Description

Technical Field

[0001] This disclosure relates to an adsorption device and a drying oven. Background Technology

[0002] The adsorption device described in Patent Document 1 includes a filter, a frame, and multiple sealing materials. The filter is generally cylindrical. The filter carries the adsorption material. Furthermore, the filter has multiple gaps extending from one end face to the other. Air flowing in from one end face of the filter flows out through these gaps to the other end face. At this time, specific adsorbed substances contained in the flowing air are adsorbed onto the adsorption material. Additionally, the filter can rotate using its central axis as a rotation axis. The frame has through holes. The open end face of the frame faces the end face of the filter at a gap.

[0003] Multiple sealing materials are plate-shaped with a main surface. Each sealing material is installed at the opening edge of the through hole in the frame. Furthermore, each sealing material extends from the opening edge of the frame toward the end face of the filter. Additionally, a portion of the front end side of each sealing material makes surface contact with the end face of the filter. That is, each sealing material seals the gap between the end face of the filter and the opening end face of the frame.

[0004] Prior art literature

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2012-179582 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] In the adsorption device described in Patent Document 1, air flowing into the filter reaches the end face of the filter through the through holes in the frame. As described above, each sealing material is in surface contact with the end face of the filter, and therefore, the air pressure of the flowing air presses the sealing material against the end face of the filter. If the filter is rotated in this state, the friction between the sealing material and the end face of the filter tends to increase.

[0009] Technical solutions for solving the problem

[0010] To address the aforementioned problems, this disclosure provides an adsorption device comprising: a filter, which is cylindrical with an adsorption carrier capable of rotating about a central axis, the adsorption carrier carrying an adsorbent material capable of adsorbing specific substances; a frame having a circular opening edge centered on the central axis of the filter; and a sealing material sandwiched between the filter and the frame, the frame having an annular outer peripheral wall centered on the central axis on the outer side relative to the opening edge, the filter having an annular protruding wall facing the outer peripheral wall along the central axis, and the sealing material contacting the inner peripheral surface of the outer peripheral wall and the inner peripheral surface of the protruding wall. Additionally, this disclosure provides a drying oven comprising: the aforementioned adsorption device; a drying chamber; and a pipe connected to the frame in the adsorption device for the flow of gas discharged from the drying chamber.

[0011] Invention Effects

[0012] The friction between the sealing material and the end face of the filter is unlikely to increase excessively. Attached Figure Description

[0013] Figure 1 This is a three-dimensional diagram of the adsorption device.

[0014] Figure 2 This is a block diagram of a drying oven.

[0015] Figure 3 This is the main view of the filter.

[0016] Figure 4 This is the main view of the first frame.

[0017] Figure 5 It is a perspective view showing the positional relationship of the filter, frame, and sealing material when viewed in cross-section.

[0018] Figure 6 It is a cross-sectional view of the filter, frame, and sealing materials.

[0019] Figure 7 This is an explanatory diagram illustrating the sealing material in the modified example. Detailed Implementation

[0020] <An embodiment of the adsorption device>

[0021] The following describes one embodiment of the adsorption device. It should be noted that the accompanying drawings sometimes show enlarged components to facilitate understanding. The size ratios of the components may sometimes differ from the actual size ratios or those in other drawings.

[0022] (Regarding the overall structure of the adsorption device)

[0023] like Figure 1 As shown, the adsorption device 10 includes a first frame 20, a second frame 30, and a filter 40. The overall shape of the adsorption device 10 is approximately cylindrical. That is, the first frame 20, the second frame 30, and the filter 40 are all approximately cylindrical in shape with approximately the same diameter. It should be noted that, hereinafter, a specific direction parallel to the central axis CA of the filter 40 is designated as the positive direction PD. A direction parallel to the central axis CA that is opposite to the positive direction PD is designated as the negative direction ND.

[0024] The filter 40 is generally cylindrical in shape. The filter 40 is located approximately in the center of the adsorption device 10. The filter 40 is situated between the first frame 20 and the second frame 30.

[0025] The filter 40 includes an adsorbent carrier CS and an outer frame OF. The adsorbent carrier CS is a support for an adsorbent material capable of adsorbing a specific substance. The adsorbent material is, for example, a catalyst. The specific substance is a vaporized organic solvent. The adsorbent carrier CS is approximately cylindrical in shape. Hereinafter, the end face of the adsorbent carrier CS on the negative ND side is designated as the first end face 41. The end face of the adsorbent carrier CS on the positive PD side is designated as the second end face 42.

[0026] The peripheral framework (OF) is a cylindrical framework covering the periphery of the adsorbent carrier (CS). In other words, the adsorbent carrier CS is embedded in the through-holes of the peripheral framework (OF). The detailed structure of the peripheral framework (OF) will be described later.

[0027] like Figure 3 As shown, the adsorbent carrier CS has a so-called honeycomb structure. That is, the adsorbent carrier CS has multiple gaps G inside. Moreover, these multiple gaps G connect from the first end face 41 to the second end face 42. Therefore, air through the flow paths of the first frame 20 and the second frame 30 can pass between the first end face 41 side and the second end face 42 side of the adsorbent carrier CS. It should be noted that in Figure 3 The illustration of the portion of the first end face 41 that forms a honeycomb structure is partially omitted. Furthermore, the honeycomb structure described here is not limited to a structure formed by arranging multiple three-dimensional structures, but also includes a structure formed by arranging multiple one or more three-dimensional structures.

[0028] It should be noted that, although the illustration is omitted, the adsorption carrier CS of the filter 40 is connected to a drive source such as an electric motor via a power transmission mechanism, such as a gear mechanism. Based on the power from the drive source, the adsorption carrier CS can rotate relative to the first frame 20 and the second frame 30 at a speed of 5 revolutions per minute to 15 revolutions per minute around the central axis CA. The direction of rotation is clockwise when viewed in the positive direction PD. Furthermore, the outer peripheral frame OF covering the adsorption carrier CS can also rotate together with the adsorption carrier CS. Therefore, the filter 40 can rotate around the central axis CA.

[0029] like Figure 1 As shown, the first frame 20 is located on the negative ND side relative to the filter 40. The first frame 20 is generally cylindrical. The central axis of the first frame 20 coincides with the central axis CA of the filter 40. The first frame 20 has a through hole extending from its end on the negative ND side to its end on the positive PD side. That is, the first frame 20 has a circular opening edge OP centered on the central axis CA of the filter 40. The opening edge OP on the positive PD side of this through hole faces the first end face 41 of the filter 40 at a distance.

[0030] like Figure 4 As shown, more specifically, the first frame 20 has a first cylinder 21, a second cylinder 22, and three partitions 23.

[0031] The first cylinder 21 is cylindrical. The central axis of the first cylinder 21 coincides with the central axis CA of the filter 40. The outer diameter of the first cylinder 21 is the same as the outer diameter of the filter 40. The opening edge OP of the first cylinder 21 is the same as the opening edge OP of the first frame 20 mentioned above.

[0032] The second cylinder 22 is cylindrical. The central axis of the second cylinder 22 coincides with the central axis CA of the filter 40. The outer diameter of the second cylinder 22 is smaller than the outer diameter of the first cylinder 21. Therefore, the second cylinder 22 is located on the side of the central axis CA relative to the first cylinder 21.

[0033] Three partitions 23 connect the inner circumferential surface of the first cylinder 21 to the outer circumferential surface of the second cylinder 22. The partitions 23 are arranged at predetermined angular intervals along the circumferential direction with the central axis CA as the center. The first cylinder 21, the second cylinder 22, and the three partitions 23 divide the space into multiple flow paths. That is, the first frame 20 has a first flow path P1, a second flow path P2, and a third flow path P3 as multiple through holes. When viewed along the central axis CA of the first frame 20, the opening of each flow path is approximately fan-shaped.

[0034] The first flow path P1 is the through-hole with the largest spatial volume among the three flow paths. The central angle of the sector of the first flow path P1 is greater than 180 degrees. The second flow path P2 is the through-hole adjacent to the first flow path P1 in the counterclockwise direction when viewed in the negative ND direction. The third flow path P3 is the through-hole adjacent to the second flow path P2 in the counterclockwise direction and to the first flow path P1 in the clockwise direction when viewed in the negative ND direction. That is, the third flow path P3 is located between the first flow path P1 and the second flow path P2. The central angle of the sector of the third flow path P3 is approximately the same as the central angle of the sector of the second flow path P2.

[0035] like Figure 1 As shown, the second frame 30 is located on the positive PD side relative to the filter 40. Although not shown in the figure, the shape of the second frame 30 is the same as that of the first frame 20. That is, the second frame 30 is generally cylindrical. The central axis of the second frame 30 coincides with the central axis CA of the adsorption device 10. The second frame 30 has a through hole extending from the end on the negative ND side to the end on the positive PD side. That is, the second frame 30 has a circular opening edge centered on the central axis CA of the filter 40. The opening edge on the negative ND side of this through hole faces the second end face 42 of the filter 40 at a distance. Moreover, as Figure 2 As shown, the second frame 30 has a fourth flow path P4, a fifth flow path P5 and a sixth flow path P6 as multiple through holes.

[0036] The size and shape of the opening on the negative ND side of the fourth flow path P4 are the same as the size and shape of the opening on the positive PD side of the first flow path P1. The opening of the fourth flow path P4 is opposite to the opening of the first flow path P1, separated by the adsorbent carrier CS. That is, the first flow path P1 and the fourth flow path P4 are arranged in a direction parallel to the central axis CA, separated by the adsorbent carrier CS.

[0037] The size and shape of the opening on the negative ND side of the fifth flow path P5 are the same as the size and shape of the opening on the positive PD side of the second flow path P2. The opening of the fifth flow path P5 is opposite to the opening of the second flow path P2, separated by the adsorbent carrier CS. That is, the second flow path P2 and the fifth flow path P5 are arranged in a direction parallel to the central axis CA, separated by the adsorbent carrier CS.

[0038] The size and shape of the opening on the negative ND side of the sixth flow path P6 are the same as the size and shape of the opening on the positive PD side of the third flow path P3. The opening of the sixth flow path P6 is opposite to the opening of the third flow path P3, separated by the adsorbent carrier CS. That is, the third flow path P3 and the sixth flow path P6 are arranged in a direction parallel to the central axis CA, separated by the adsorbent carrier CS.

[0039] (Regarding the connection with the drying oven)

[0040] like Figure 1 and Figure 2 As shown, the adsorption device 10 is used as a structure of the drying furnace 100. The drying furnace 100 is, for example, a device for drying an electronic component after a coating has been applied to it. At this time, the gas discharged from the drying chamber R of the drying furnace 100 includes vaporized organic solvents, etc.

[0041] Specifically, such as Figure 1 and Figure 2 As shown, the drying oven 100 has a first pipe D1 to a sixth pipe D6. The first pipe D1 is connected to the negative ND side end of the first flow path P1 in the first frame 20. The second pipe D2 is connected to the negative ND side end of the second flow path P2 in the first frame 20. The third pipe D3 is connected to the negative ND side end of the third flow path P3 in the first frame 20. The fourth pipe D4 is connected to the positive PD side end of the fourth flow path P4 in the second frame 30. The fifth pipe D5 is connected to the positive PD side end of the fifth flow path P5 in the second frame 30. The sixth pipe D6 is connected to the positive PD side end of the sixth flow path P6 in the second frame 30.

[0042] It should be noted that, in Figure 1 and Figure 2 The diagram schematically illustrates the connection relationships between each frame and each pipe. In practice, the first pipe D1 is connected to the opening on the negative ND side of the first flow path P1 via a cover, adapter, and sealing member. Therefore, there is no gap between the first pipe D1 and the opening on the negative ND side of the first flow path P1. That is, gas leakage between the two is prevented when gas flows from the first pipe D1 to the first flow path P1. The connection relationships between the other pipes and the flow paths are the same. Known structures can be appropriately used for their connection structures.

[0043] The drying oven 100 is equipped with a first blower B1, a second blower B2, and a heater HE.

[0044] The first blower B1 blows gas containing organic solvent discharged from the drying chamber R into the first pipe D1. The gas delivered to the first pipe D1 flows in the positive direction (PD side). Therefore, the gas flows from the negative direction (ND side) of the first pipe D1 through the first flow path P1 and then through the adsorption carrier CS. Moreover, the organic solvent component contained in the gas is adsorbed onto the adsorption material as it passes through the adsorption carrier CS. Afterward, the gas, with the organic solvent component removed, is discharged into the fourth pipe D4 through the fourth flow path P4 of the second frame 30.

[0045] The second blower B2 blows air free of organic solvents into the second pipe D2. The gas supplied to the second pipe D2 flows in the positive direction (PD side) within the second pipe D2. Therefore, this air flows sequentially from the negative direction (ND side) of the second pipe D2 through the second flow path P2, the adsorbent carrier CS, the fifth flow path P5, and the fifth pipe D5. It should be noted that the air absorbs heat from the adsorbent carrier CS as it passes through the gap G in the adsorbent carrier CS. Therefore, the temperature of the air flowing through the fifth flow path P5 and the fifth pipe D5 rises to approximately 60 degrees Celsius.

[0046] Air flowing through the fifth conduit D5 is supplied to the heater HE. The heater HE then heats the supplied air, resulting in hot air at approximately 200 degrees Celsius. This hot air is supplied from the heater HE to the sixth conduit D6. The hot air then passes through the sixth conduit D6 and the sixth flow path P6 of the second frame 30, passing through the interior of the adsorbent carrier CS. At this time, the portion of the adsorbent carrier CS facing the sixth flow path P6 of the second frame 30 is exposed to the hot air flowing through the sixth flow path P6. Furthermore, the adsorbent carrier CS rotates relative to the second frame 30. Therefore, the portion of the adsorbent carrier CS facing the sixth flow path P6 of the second frame 30 is in a state of adsorbing the organic solvent contained in the gas from the first conduit D1. Thus, the hot air causes the organic solvent adsorbed on the adsorbent material to detach from the adsorbent material. The hot air containing the detached organic solvent is supplied to the designated recovery device 110 via the third flow path P3 and the third conduit D3. In this way, the adsorption device 10 can concentrate and recover the organic solvent from the gas discharged from the drying chamber R.

[0047] (Regarding the outer perimeter wall, protruding wall, and sealing materials)

[0048] Next, the sealing structure between the first frame 20 and the filter 40 will be described.

[0049] like Figure 4 As shown, the first frame 20 has a first recess 24, a second recess 25, an outer peripheral wall 26, and an inner peripheral wall 27.

[0050] The first recess 24 is a depression on the end face of the first cylinder 21 facing the filter 40. The first recess 24 extends in an annular shape centered on the central axis CA. Moreover, the outer peripheral wall 26 is the wall that divides the first recess 24 and is located on the outer side relative to the first recess 24. Therefore, the outer peripheral wall 26 is an annular wall located on the outer side relative to the opening edge OP of the first cylinder 21 and centered on the central axis CA.

[0051] The second recess 25 is a depression on the end face of the second cylinder 22 facing the filter 40. The second recess 25 extends in an annular shape centered on the central axis CA. Moreover, the inner peripheral wall 27 is the wall that divides the second recess 25 and is located on the side of the central axis CA relative to the second recess 25. Therefore, the inner peripheral wall 27 is an annular wall located inside the opening edge OP of the first cylinder 21 and centered on the central axis CA.

[0052] like Figure 3 As shown, the filter 40 has a first groove 43, a second groove 44, a first protruding wall 45, and a second protruding wall 46. It should be noted that... Figure 3 In the middle, the wall dividing the first groove 43 and the wall dividing the second groove 44 are shown in thick lines.

[0053] The first groove 43 is a recess in the filter 40 at the first end face 41, which is the side of the filter 40 facing the first frame 20 of the outer peripheral frame OF. The first groove 43 extends in an annular shape centered on the central axis CA. Furthermore, the first groove 43 faces the first recess 24 of the first cylinder 21 in the direction along the central axis CA.

[0054] The first protruding wall 45 is the wall that is located on the outer side of the first groove 43 relative to the first groove 43. Therefore, the first protruding wall 45 is an annular wall that faces the outer peripheral wall 26 of the first frame 20 in the direction along the central axis CA.

[0055] The second groove 44 is a recess at the first end face 41 of the adsorbent carrier CS. The second groove 44 extends in a circular shape around the central axis CA. The second groove 44 faces the second recess 25 of the second cylinder 22 in the direction along the central axis CA.

[0056] The second protruding wall 46 is the wall that divides the second groove 44 and is located on the side of the central axis CA relative to the second groove 44. Therefore, the second protruding wall 46 is an annular wall that faces the inner peripheral wall 27 of the first frame 20 in the direction along the central axis CA.

[0057] like Figure 4 As shown, the adsorption device 10 includes a first sealing material 51 and a second sealing material 52. It should be noted that... Figure 4 In the image, the first sealing material 51 and the second sealing material 52 are shown with double-dotted lines.

[0058] The first sealing material 51 is a spiral spring wound into a helical shape. It should be noted that this type of spiral spring is sometimes called a coil spring. The main surface of the first sealing material 51 faces a direction orthogonal to the winding axis. The material of the first sealing material 51 is stainless steel for springs. For example, the material of the first sealing material 51 is cold-rolled steel strip (CSP) for springs. It should be noted that it is not limited to multiple turns; as long as it is wound more than once, i.e., wound more than 360 degrees, it is a spiral spring.

[0059] like Figure 5 and Figure 6 As shown, the first sealing material 51 is sandwiched between the outer peripheral frame OF and the first frame 20. Specifically, the first sealing material 51 is located within the space defined by the first recess 24 and the first groove 43. Furthermore, the first sealing material 51 contacts the inner peripheral surface of the outer peripheral wall 26 of the first frame 20 and the inner peripheral surface of the first protruding wall 45 of the outer peripheral frame OF. It should be noted that the inner peripheral surface of the outer peripheral wall 26 refers to the surface of the outer surface of the outer peripheral wall 26 facing the central axis CA. The inner peripheral surface of the first protruding wall 45 refers to the surface of the outer surface of the first protruding wall 45 facing the central axis CA.

[0060] like Figure 4 As shown, the first sealing material 51 is wound around the central axis CA at least once. In this embodiment, the first sealing material 51 is wound approximately two times. Here, the direction of rotation from the inner circumferential end of the first sealing material 51 to the outer circumferential end is defined as the direction in which the first sealing material 51 is wound. The direction in which the first sealing material 51 is wound is the same as the rotation direction of the filter 40. That is, when the adsorption device 10 is viewed in the negative direction ND, the filter 40 rotates counterclockwise. Moreover, when the adsorption device 10 is viewed in the negative direction ND, the first sealing material 51 is wound counterclockwise from the inner circumferential end toward the outer circumferential end. It should be noted that since the first sealing material 51 is wound more than once, the total length of the first sealing material 51 is approximately 3.14 times or more the diameter of the outer circumferential frame OF. It should be noted that the "total length" refers to the length including the overlapping portion of the first sealing material 51 wound in multiple layers.

[0061] Furthermore, the first sealing material 51 is sandwiched between the outer peripheral frame OF and the first frame 20 in a state of elastic compression and tight winding. "In a state of elastic compression and tight winding" means that the diameter of the sealing material is smaller than the state in which no external force is applied to it. Therefore, under the action of its own restoring force, the diameter of the first sealing material 51 tends to increase. As a result, the outer main surface of the first sealing material 51 is pressed against the inner peripheral surface of the outer peripheral wall 26 of the first frame 20 and the inner peripheral surface of the first protruding wall 45 of the filter 40.

[0062] Based on this positional relationship, the first sealing material 51 blocks the gap between the end face of the first cylinder 21 facing the outer peripheral frame OF and the first end face 41 of the outer peripheral frame OF relative to the opening of the first cylinder 21 from the outer peripheral side. That is, it prevents air flowing from the various flow paths of the first frame 20 to the gap G of the outer peripheral frame OF from leaking out of the adsorption device 10 to the outside through this gap. Furthermore, the first sealing material 51 does not engage with the filter 40 and the first frame 20 but remains between the outer peripheral frame OF and the first frame 20. Thus, the first sealing material 51 can rotate relative to both the filter 40 and the first frame 20 in the circumferential direction centered on the central axis CA.

[0063] The second sealing material 52 is a spiral-shaped strip spring. The material of the second sealing material 52 is the same as that of the first sealing material 51, which is stainless steel for springs. The main surface of the second sealing material 52 faces a direction orthogonal to the winding axis.

[0064] Although not shown in the diagram, the second sealing material 52 is sandwiched between the adsorption carrier CS of the filter 40 and the first frame 20. Specifically, the second sealing material 52 is located within the space defined by the second recess 25 and the second groove 44. Furthermore, the second sealing material 52 is in contact with the outer peripheral surface of the inner peripheral wall 27 of the first frame 20 and the outer peripheral surface of the second protruding wall 46 of the filter 40. It should be noted that the outer peripheral surface of the inner peripheral wall 27 refers to the surface of the outer surface of the inner peripheral wall 27 facing the first cylinder 21. The outer peripheral surface of the second protruding wall 46 refers to the surface of the outer surface of the second protruding wall 46 facing the outer peripheral side of the filter 40.

[0065] like Figure 4 As shown, the second sealing material 52 is wound around the central axis CA at least one turn. In this embodiment, the second sealing material 52 is wound approximately one turn. Furthermore, the direction in which the second sealing material 52 is wound is the same as the rotation direction of the filter 40. That is, when the adsorption device 10 is viewed in the negative direction ND, the second sealing material 52 is wound counterclockwise from the inner peripheral end to the outer peripheral end.

[0066] Furthermore, the second sealing material 52 is sandwiched between the adsorption carrier CS of the filter 40 and the first frame 20 in a stretched, loosely wound state. "Stretched, loosely wound state" means that the diameter of the sealing material is larger than the state where no external force is applied to it. Therefore, under its own restoring force, the diameter of the second sealing material 52 tends to decrease. As a result, the outer main surface of the second sealing material 52 is pressed against the outer peripheral surface of the inner peripheral wall 27 of the first frame 20 and the outer peripheral surface of the second protruding wall 46 of the filter 40.

[0067] Based on this positional relationship, the second sealing material 52 blocks the gap between the end face of the second cylinder 22 facing the filter 40 and the second end face 42 of the adsorbent carrier CS from the outer peripheral side relative to the opening of the second cylinder 22. That is, it prevents air flowing from the various flow paths of the first frame 20 to the gap G of the adsorbent carrier CS from flowing towards the center side of the second cylinder 22. In addition, the second sealing material 52 does not engage with the filter 40 and the first frame 20 but remains between the filter 40 and the first frame 20. Therefore, the second sealing material 52 can rotate relative to both the filter 40 and the second frame 30 in the circumferential direction centered on the central axis CA.

[0068] Although the illustration is omitted, the second frame 30 has a third recess and a fourth recess.

[0069] The structure of the third recess is the same as that of the first recess 24 in the first frame 20. That is, the third recess is a depression at the end face of the second frame 30 facing the outer peripheral frame OF. Furthermore, the third recess extends in a ring shape centered on the central axis CA. The third recess is opposite to the first recess 24 across the filter 40 in the direction along the central axis CA.

[0070] The structure of the fourth recess is the same as that of the second recess 25 in the first frame 20. That is, the fourth recess is a depression at the end face of the second frame 30 facing the filter 40. Furthermore, the fourth recess extends in a ring shape centered on the central axis CA. The fourth recess is opposite the second recess 25 across the filter 40 in the direction along the central axis CA.

[0071] The filter 40 has a third groove and a fourth groove. The third groove is a recess on the end face 42 of the filter 40 facing the second frame 30. The structure of the third groove is the same as that of the first groove 43 on the first end face 41. The third groove is located in the second end face 42 of the filter 40, opposite to the third recess.

[0072] The fourth groove is a recess at the second end face 42. The fourth groove is located in the second end face 42 of the filter 40, opposite to the fourth recess. The structure of the fourth groove is the same as that of the second groove 44 at the first end face 41. The fourth groove is located in the second end face 42 of the filter 40, opposite to the second recess 25.

[0073] The adsorption device 10 includes a third sealing material and a fourth sealing material (not shown). The material of the third sealing material and the fourth sealing material is the same as that of the first sealing material 51, which is stainless steel for springs.

[0074] The positional relationship of the third sealing material relative to the filter 40 and the second frame 30 is the same as the positional relationship of the first sealing material 51 relative to the filter 40 and the first frame 20. That is, the third sealing material is sandwiched between the filter 40 and the second frame 30. Specifically, the third sealing material is in contact with the inner circumferential surface of the outer circumferential wall of the third recess of the second frame 30 and the inner circumferential surface of the third protruding wall of the filter 40.

[0075] The positional relationship of the fourth sealing material relative to the filter 40 and the second frame 30 is the same as the positional relationship of the second sealing material 52 relative to the filter 40 and the first frame 20. That is, the fourth sealing material is sandwiched between the filter 40 and the second frame 30. Specifically, the fourth sealing material is in contact with the outer peripheral surface of the inner peripheral wall of the fourth recess of the second frame 30 and the outer peripheral surface of the fourth protruding wall of the filter 40.

[0076] (Regarding the dimensions of the recesses and grooves)

[0077] The width of the first groove 43 is less than 1 / 80 of the diameter of the filter 40. It should be noted that the width of the first groove 43 refers to the shortest distance between the two walls dividing the first groove 43 on the same plane as the end face of the filter 40. Specifically, the diameter of the filter 40 is 300 mm or more and 1000 mm or less. Furthermore, the width of the first groove 43 is approximately 1 / 100 of the diameter of the filter 40. That is, the width of the first groove 43 is 3 mm or more and 10 mm or less.

[0078] The width of the first groove 43 is at least three times and less than 20 times the thickness of the first sealing material 51 and the second sealing material 52. More preferably, the width of the first groove 43 is at least three times and less than 10 times the thickness of the first sealing material 51 and the second sealing material 52. Specifically, the thickness of the first sealing material 51 and the thickness of the second sealing material 52 are at least 0.5 mm and less than 1.0 mm.

[0079] It should be noted that the structure related to these width dimensions is also the same for the widths of the second recess 25 to the fourth recess, the widths of the first groove 43 to the fourth groove, and the second sealing material 52 to the fourth sealing material.

[0080] (Regarding the effects of this implementation method)

[0081] According to the structure of the above embodiment, the following effects are achieved. It should be noted that although only the effects related to the first sealing material 51 and the second sealing material 52 are described, the third sealing material and the fourth sealing material sandwiched between the second end face 42 of the filter 40 and the second frame 30 also achieve the same effects.

[0082] (1) In the above embodiment, the first sealing material 51 contacts the inner circumferential surface of the first protruding wall 45 and the inner circumferential surface of the outer circumferential wall 26. Here, gas is blown from the first blower B1 and the second blower B2, so the air pressure in the gap between the first frame 20 and the filter 40 is slightly higher than the external air pressure. With this pressure, the first sealing material 51 is pressed against each inner circumferential surface. That is, by the positive pressure in the gap between the first frame 20 and the filter 40, the first sealing material 51 blocks the gap between the first frame 20 and the filter 40. On the other hand, the main surface of the first sealing material 51 is along the central axis CA. That is, the direction in which the main surface of the first sealing material 51 extends is consistent with the direction of the gas flowing in the gap between the first frame 20 and the filter 40. Therefore, the air pressure applied to the first sealing material 51 is not likely to increase. As a result, when the filter 40 rotates, the friction between the first sealing material 51 and the filter 40 is not likely to increase.

[0083] (2) In the above embodiment, the filter 40 has a first groove 43. The first frame 20 has a first recess 24. According to their structure, the first sealing material 51 can be installed in the filter 40 or the first frame 20 by being embedded in the recess. That is, the positioning of the first sealing material 51 can be easily performed.

[0084] (3) In the above embodiment, the first sealing material 51 can rotate relative to both the filter 40 and the first frame 20 in a circumferential direction centered on the central axis CA. For example, suppose that the frictional force between the first sealing material 51 and the filter 40 is greater than the frictional force between the first sealing material 51 and the first frame 20. In this case, when the filter 40 rotates, the first sealing material 51 mainly rotates relative to the first frame 20. Alternatively, if the relationship between the magnitudes of the frictional forces is reversed, when the filter 40 rotates, the first sealing material 51 mainly rotates relative to the filter 40. In this way, the first sealing material 51 rotates relative to an object with less friction, thus suppressing wear on the first sealing material 51.

[0085] (4) In the above embodiment, the first sealing material 51 is a helical spring wound around the central axis CA one or more times. Furthermore, the first sealing material 51 is elastically compressed and tightly wound between the filter 40 and the first frame 20. Therefore, the first sealing material 51 has a restoring force that returns it from the tightly wound state to its original state. Thus, the first sealing material 51 easily adheres to the outer walls of the first recess 24 and the first groove 43. That is, the airtightness between the filter 40 and the first frame 20 can be improved.

[0086] (5) In the above embodiment, the second sealing material 52 contacts the outer peripheral surface of the second protruding wall 46 and the outer peripheral surface of the inner peripheral wall 27. As described above, the air pressure in the gap between the first frame 20 and the filter 40 is slightly higher than the external air pressure. With this pressure, the second sealing material 52 is pressed against each outer peripheral surface. That is, through the positive pressure in the gap between the first frame 20 and the filter 40, the second sealing material 52 blocks the gap between the first frame 20 and the filter 40. On the other hand, the main surface of the second sealing material 52 is along the central axis CA. That is, the direction in which the main surface of the second sealing material 52 extends is consistent with the direction of the gas flowing in the gap between the first frame 20 and the filter 40. Therefore, the air pressure applied to the second sealing material 52 is not likely to increase. As a result, when the filter 40 rotates, the friction between the second sealing material 52 and the filter 40 is not likely to increase.

[0087] (6) In the above embodiment, the second sealing material 52 is a helical spring wound around the central axis CA one or more times. Furthermore, the second sealing material 52 is sandwiched between the filter 40 and the first frame 20 in a stretched, loosely wound state. Therefore, the second sealing material 52 has a restoring force that returns it from the loosely wound state to its original state. Thus, the second sealing material 52 easily adheres to the inner peripheral wall 27 and the second protruding wall 46 side. That is, the airtightness between the filter 40 and the second frame 30 can be improved.

[0088] <Example of Change>

[0089] The above-described embodiments can be implemented by modification as follows. The above-described embodiments and the following modifications can be combined with each other to the extent that they are not technically contradictory.

[0090] The type of adsorbent material carried by the adsorbent carrier CS is not limited to the examples of the above embodiments. That is, the adsorbed substance is not limited to organic solvents. For example, the type of adsorbent material can be changed in order to use the filter 40 as a deodorization filter.

[0091] The construction of the adsorbent carrier CS is not limited to the examples of the embodiments described above. For example, the adsorbent carrier CS may also be a carrier made of a porous material such as a sponge. However, at least a portion of the pores of the adsorbent carrier CS needs to be continuous pores from the first end face 41 to the second end face 42 of the adsorbent carrier CS.

[0092] The dimensions of the filter 40 are not limited to the examples described in the above embodiments. They can also be appropriately changed depending on the application and type of the filter 40.

[0093] • The first frame 20 may not have multiple through holes and partitions 23. For example, even if the first frame 20 is only a first cylinder 21, it is sufficient as long as the first cylinder 21 has a circular opening edge OP.

[0094] The first frame 20 may also lack the first recess 24 to the fourth recess. At least the first frame 20 may have an annular outer peripheral wall 26 centered on the central axis CA on the outer side relative to the opening edge OP. For example, the first cylinder 21 may also be a cylinder without the first recess 24. In this case, the first cylinder 21 itself is the outer peripheral wall 26. Even in this case, the first frame 20 still has an annular outer peripheral wall 26 centered on the central axis CA on the outer side relative to the opening edge OP. That is, the first sealing material 51 contacts the inner peripheral surface of the first cylinder 21.

[0095] • The filter 40 may also be without an outer peripheral frame OF. For example, the filter 40 may only have an adsorbent carrier CS, which may also have a first groove 43. That is, the adsorbent carrier CS may also have an annular first protruding wall 45 at a position facing the outer peripheral wall 26.

[0096] The first sealing material 51 may also be engaged with either the filter 40 or the first frame 20. At least the first sealing material 51 must be in contact with the inner circumferential surface of the outer peripheral wall 26 and the inner circumferential surface of the first protruding wall 45, and the filter 40 must be able to rotate. The same applies to the second to fourth sealing materials 52.

[0097] The first sealing material 51 may not be a helical spring wound more than one turn around the central axis CA. The first sealing material 51 may also be wound less than one turn around the central axis CA, and other sealing materials may be placed between the ends of the first sealing material 51.

[0098] • The first sealing material 51 may not be elastically compressed into a tightly wound state. If at least the first sealing material 51 is in contact with the inner circumferential surface of the outer peripheral wall 26 and the inner circumferential surface of the first protruding wall 45, then air leakage from the adsorption device 10 is prevented in this part. The same applies to the third sealing material.

[0099] The second sealing material 52 may not be stretched into a loose, coiled state. If at least the second sealing material 52 is in contact with the outer peripheral surface of the inner peripheral wall 27 and the outer peripheral surface of the second protruding wall 46, air leakage into the interior of the second cylinder 22 is prevented in this portion. The same applies to the fourth sealing material.

[0100] • The adsorption device 10 may also not have a second sealing material 52. For example, if the second cylinder 22 is not cylindrical but columnar without internal cavities, air will not leak into the interior of the second cylinder 22.

[0101] The material of the first sealing material 51 is not limited to the examples described in the above embodiments. For example, it can also be a copper alloy material such as first brass, phosphor bronze, zinc cupronickel, and beryllium copper. The same applies to the second to fourth sealing materials.

[0102] The adsorption device 10 may also have five or more sealing materials. For example, the adsorption device 10 may also have a fifth sealing material that overlaps with the first sealing material 51 on the side of the central axis CA. As a result, the force exerted by the sealing material on the outer periphery is increased, thus making it easier to further prevent air from leaking out of the adsorption device 10.

[0103] The adsorption device 10 may also include a spring member 60 that applies force to the first sealing material 51 in the direction of loosening the winding.

[0104] exist Figure 7 In the example shown, the spring member 60 is connected to the first sealing material 51 at two points at its end that clamps the outer periphery of the first sealing material 51. Furthermore, the spring member 60 is elastically compressed when the first sealing material 51 is installed on the filter 40, etc. Therefore, the restoring force of the spring member 60 applies force to the first sealing material 51 in the direction of loosening of the winding, i.e., the direction of increasing diameter. Thus, this force can be adjusted using the elastic modulus of the spring member 60 and its position on the first sealing material 51. That is, due to the presence of the spring member 60, the frictional force generated on the first sealing material 51 can be adjusted, or the sealing tightness of the gap between the first frame 20 and the filter 40 can be adjusted. The same applies to the third sealing material.

[0105] • In the above embodiment, the recycling device 110 is treated as a different structure from the drying oven 100, but the drying oven 100 may also include the recycling device 110.

[0106] • The connection relationship between the adsorption device 10 and each flow path can be appropriately changed. As long as the gas containing organic solvent discharged from the drying chamber R is supplied to the adsorption device 10, the number of flow paths, connection relationship and other structures are not limited.

[0107] <Postscript>

[0108] The technical concepts that can be grasped based on the above-described embodiments and modifications are described.

[0109] [1] An adsorption device comprising: a filter, which is a columnar structure having an adsorption carrier and is rotatable about a central axis, the adsorption carrier carrying an adsorption material capable of adsorbing a specific substance; a frame having a circular opening edge centered on the central axis of the filter; and a sealing material sandwiched between the filter and the frame, the frame having an annular outer peripheral wall centered on the central axis on the outer side relative to the opening edge, the filter having an annular protruding wall at a position facing the outer peripheral wall in the direction along the central axis, the sealing material contacting the inner peripheral surface of the outer peripheral wall and the inner peripheral surface of the protruding wall.

[0110] [2] According to the adsorption device of [1], the filter has a groove that is recessed at an end face on the side facing the frame and extends in an annular shape around the central axis, and the protruding wall is the wall that is located on the outer side of the groove relative to the groove.

[0111] [3] The adsorption device according to claim [1] or [2], wherein the frame has a recessed end face on the side facing the filter and extends in an annular shape centered on the central axis, and the outer peripheral wall is the wall that is located on the outer side of the recess relative to the recess among the walls that divide the recess.

[0112] [4] The adsorption device according to any one of [1] to [3], wherein,

[0113] The sealing material is capable of rotating relative to both the filter and the frame in a circumferential direction centered on the central axis.

[0114] [5] The adsorption device according to any one of [1] to [4], wherein the sealing material is a helical spring wound around the central axis more than once, and is clamped between the filter and the frame in a state of elastic compression and tight winding.

[0115] [6] According to the adsorption device of [5], the adsorption device includes a spring member that applies force to the sealing material in the direction of loosening the winding.

[0116] [7] An adsorption device according to any one of [1] to [6], wherein, when the sealing material is a first sealing material and the protruding wall is a first protruding wall, the adsorption device further comprises a second sealing material sandwiched between the filter and the frame, the frame having a cylindrical inner peripheral wall centered on the central axis of the filter on the inner side relative to the opening edge, the filter having an annular second protruding wall at a position facing the inner peripheral wall in the direction along the central axis, the second sealing material contacting the outer peripheral surface of the inner peripheral wall and the outer peripheral surface of the second protruding wall.

[0117] [8] According to the adsorption device described in [7], wherein,

[0118] The second sealing material is a helical spring wound more than one turn around the central axis, and is sandwiched between the filter and the frame in a stretched, loosened state.

[0119] Explanation of reference numerals in the attached figures

[0120] 10…Adsorption device;

[0121] CA…Central axis;

[0122] PD…positive direction;

[0123] ND…negative direction;

[0124] 20…First Framework;

[0125] 21…First cylinder;

[0126] 24...the first recess;

[0127] 26…outer perimeter wall;

[0128] 22…Second cylinder;

[0129] 25...the second concave part;

[0130] 27…inner peripheral wall;

[0131] 30…Second Frame;

[0132] 40… filters;

[0133] CS…adsorbent carrier;

[0134] OF…peripheral framework;

[0135] 41…First end face;

[0136] 43…First groove section;

[0137] 45…First projecting wall;

[0138] 44…Second groove section;

[0139] 46…Second protruding wall;

[0140] 42…Second end face;

[0141] 51…First sealing material;

[0142] 52…Second sealing material;

[0143] 60… Spring component.

Claims

1. An adsorption device comprising: a filter that is cylindrical with an adsorption carrier that carries an adsorbent material capable of adsorbing a specific substance, and is rotatable about a central axis; a frame that has an open rim in a circular shape centered on the central axis of the filter; and a sealing material interposed between the filter and the frame, wherein the frame has an outer peripheral wall in a circular ring shape centered on the central axis on the outside relative to the open rim, the filter has a protruding wall in a circular ring shape at a position facing the outer peripheral wall in the direction along the central axis, and the sealing material is in contact with the inner peripheral surface of the outer peripheral wall and the inner peripheral surface of the protruding wall.

2. The adsorption device according to claim 1, wherein the filter has a groove portion that is recessed at an end surface on the side facing the frame and extends in a circular ring shape centered on the central axis, and the protruding wall is a wall among walls that divide the groove portion, which is on the outside relative to the groove portion.

3. The adsorption device according to claim 1 or 2, wherein the frame has a recessed portion that is recessed at an end surface on the side facing the filter and extends in a circular ring shape centered on the central axis, and the outer peripheral wall is a wall among walls that divide the recessed portion, which is on the outside relative to the recessed portion.

4. The adsorption device according to any one of claims 1 to 3, wherein the sealing material is relatively rotatable in a circumferential direction centered on the central axis relative to both the filter and the frame.

5. The adsorption device according to any one of claims 1 to 4, wherein the sealing material is a coil spring that is wound more than one turn centered on the central axis, and is interposed between the filter and the frame in a state of being elastically compressed to be wound tight.

6. The adsorption device according to claim 5, wherein the adsorption device comprises a spring member that exerts a force on the sealing material in a direction in which the winding is loosened.

7. The adsorption device according to any one of claims 1 to 6, wherein, when the sealing material is a first sealing material and the protruding wall is a first protruding wall, the adsorption device further comprises a second sealing material interposed between the filter and the frame, the frame has an inner peripheral wall in a cylindrical shape centered on the central axis of the filter on the inside relative to the open rim, the filter has a second protruding wall in a circular ring shape at a position facing the inner peripheral wall in the direction along the central axis, and the second sealing material is in contact with the outer peripheral surface of the inner peripheral wall and the outer peripheral surface of the second protruding wall.

8. The adsorption device according to claim 7, wherein the second sealing material is a coil spring that is wound more than one turn centered on the central axis, and is interposed between the filter, and the frame in a state of being stretched to be wound loose.

9. A drying furnace comprising: the adsorption device according to any one of claims 1 to 8; a drying chamber; and ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ a duct connected to the frame in the adsorption device for the passage of the gas stream exiting from the drying chamber.

Images