Carbon dioxide recovery device

Abstract

This carbon dioxide recovery device disclosed herein is provided in a fluid apparatus having a first fan, the carbon dioxide recovery device including: an adsorbent container that is disposed at a position where a first airflow generated by the first fan hits, and that can accommodate an adsorbent capable of adsorbing carbon dioxide; and a second fan different from the first fan.

Description

Carbon dioxide capture equipment

[0001] The present disclosure relates to carbon dioxide capture devices.

[0002] Patent Document 1 discloses an apparatus for removing carbon dioxide from the air using an adsorbent capable of adsorbing carbon dioxide, in which airflow energy from a fluid device is utilized to adsorb the carbon dioxide.

[0003] Japanese Patent Application Publication No. 2020-131166

[0004] In the configuration of Patent Document 1, the airflow resistance of the adsorbent reduces the airflow performance of the fluidic device. There is a need to capture carbon dioxide while suppressing the reduction in the airflow performance of the fluidic device.

[0005] In view of the above circumstances, an object of the present disclosure is to provide a carbon dioxide capture device that is capable of capturing carbon dioxide while suppressing a decrease in the air blowing performance of a fluid device.

[0006] One aspect of the carbon dioxide capture device according to the present disclosure is a carbon dioxide capture device provided in a fluid device having a first fan, and includes an adsorbent container that is positioned at a position where it is hit by a first airflow generated by the first fan and that is capable of containing an adsorbent capable of adsorbing carbon dioxide, and a second fan that is different from the first fan.

[0007] According to the present disclosure, it is possible to provide a carbon dioxide capture device that is capable of capturing carbon dioxide while suppressing a decrease in the air blowing performance of a fluid device.

[0008] 1 is a schematic diagram of a carbon dioxide capture system according to embodiment 1. FIG. 1 is a schematic diagram of a carbon dioxide capture system according to a first modified example of embodiment 1. FIG. 1 is a schematic diagram of a carbon dioxide capture system according to a second modified example of embodiment 1. FIG. 1 is a schematic diagram of a carbon dioxide capture system according to embodiment 2. FIG. 1 is a schematic diagram of a carbon dioxide capture system according to embodiment 3. FIG. 1 is a view of the carbon dioxide capture system according to embodiment 3 from the outlet side. FIG. 1 is a schematic diagram of a carbon dioxide capture system according to embodiment 4. FIG. 1 is a view of the carbon dioxide capture system according to embodiment 4 from the inlet side. FIG. 1 is a schematic diagram of a carbon dioxide capture system according to embodiment 5. FIG. 1 is a view of the carbon dioxide capture system according to embodiment 5 from the outlet side. FIG. 1 is a schematic diagram of a carbon dioxide capture system according to embodiment 6. FIG. 1 is a view of the carbon dioxide capture system according to embodiment 6 from the top side. FIG. 1 is a schematic diagram of a carbon dioxide capture system according to embodiment 7. FIG. 1 is a view of the carbon dioxide capture system according to embodiment 7 from the bottom side. FIG. 1 is a schematic diagram of a carbon dioxide capture system according to a modified example of embodiment 7. FIG. 1 is a view of the carbon dioxide capture system according to a modified example of embodiment 7 from the bottom side. FIG. 1 is a schematic diagram of a carbon dioxide capture system according to embodiment 8. FIG. 1 is a view of the carbon dioxide capture system according to embodiment 8 from the inlet side. FIG. 1 is a schematic diagram of a carbon dioxide capture system according to a modified example of embodiment 8. FIG. 14B is a diagram of a carbon dioxide capture system according to a modification of embodiment 8, viewed from the suction port side. FIG. 15C is a schematic diagram of a carbon dioxide capture system according to embodiment 9. FIG. 16 is a diagram of a carbon dioxide capture system according to embodiment 9, viewed from the suction port side. FIG. 17 is a schematic diagram of a carbon dioxide capture system according to embodiment 10. FIG. 18 is a cross-sectional view taken along line A-A in FIG. 14B. FIG. 19 is a schematic diagram of a carbon dioxide capture system according to a modification of embodiment 10. FIG. 20 is a cross-sectional view taken along line B-B in FIG. 21B.

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the scope of the present disclosure is not limited to the following embodiments and can be modified as desired within the scope of the technical concept of the present disclosure.

[0010] First Embodiment First, in the first embodiment, a basic configuration of a carbon dioxide capture system 1 will be described. Fig. 1 is a schematic diagram of the carbon dioxide capture system 1 according to the first embodiment. As shown in Fig. 1, the carbon dioxide capture system 1 includes a fluid device 10 and a carbon dioxide capture device 20.

[0011] The fluid device 10 is, for example, an outdoor unit of an air conditioner, an indoor unit of an air conditioner, or a ventilation fan. The fluid device 10 has a housing 11 and a first fan 12. The housing 11 is formed with an intake port 13 and an outlet port 14.

[0012] The first fan 12 is disposed inside the housing 11. The first fan 12 has blades 12a. The blades 12a are rotated about a first rotation axis R1 by a fan motor (not shown). The first fan 12 is, for example, an axial fan. The first fan 12 may also be a centrifugal fan. When the first fan 12 is driven, air is drawn into the housing 11 through the air inlet 13. The air drawn into the housing 11 is then blown out of the housing 11 through the air outlet 14. In this embodiment, the air inlet 13 and the air outlet 14 are formed on opposing surfaces of the housing 11. Therefore, the flow direction of the first airflow generated by the first fan 12 is linear. However, the flow direction of the first airflow may be curved. The hollow arrows in FIG. 1 indicate airflow. Similarly, hollow arrows in FIGS. 2 to 15C also indicate airflow.

[0013] The carbon dioxide capture device 20 captures carbon dioxide by utilizing the air-blowing energy of the first fan 12. The carbon dioxide capture device 20 has an adsorbent 21, an adsorbent container 22, and a second fan 23.

[0014] The adsorbent 21 contains a material capable of adsorbing carbon dioxide. Examples of materials capable of adsorbing carbon dioxide include amine, zeolite, silica gel, diatomaceous earth, alumina, and activated carbon. A plurality of materials may be selected from the above, or a material other than the above may be used. The adsorbent 21 may be in a granular shape (for example, bead-like (spherical) or pellet-like (cylindrical)). Alternatively, a powdered adsorbent 21 may be used. In this case, the powdered adsorbent 21 may be supported on the surface of a substrate. The substrate may be, for example, honeycomb-shaped.

[0015] The adsorbent container 22 is a container capable of containing the adsorbent 21. For example, in the present embodiment, the adsorbent container 22 is a box-shaped container having six sides. Note that the adsorbent container 22 may be shaped other than a box-shaped container, such as a cylindrical container, as long as the adsorbent 21 does not leak to unintended locations. In the present embodiment, the adsorbent container 22 is disposed outside the housing 11. The adsorbent container 22 is disposed to face the suction port 13 formed in the housing 11. The adsorbent container 22 is disposed in a position where it is hit by the first airflow. The adsorbent container 22 is disposed upstream of the first fan 12 in the flow direction of the first airflow. The length of the adsorbent container 22 in the thickness direction is shorter than the length of the adsorbent container 22 in the height direction. The thickness direction of the adsorbent container 22 is the left-right direction of the paper in FIG. 1 and is the flow direction of the second airflow generated by the second fan 23. 1 , and is a direction perpendicular to the flow direction of the second airflow. By shortening the length in the thickness direction of the adsorbent container 22, the ventilation resistance is reduced, and a decrease in the air blowing performance of the fluid device 10 can be suppressed.

[0016] The adsorbent container 22 is breathable. Therefore, when the first fan 12 blows air, air enters the adsorbent container 22 and the air inside the adsorbent container 22 is exhausted. In other words, the air blown by the first fan 12 can replace the air inside the adsorbent container 22 with the air outside. Furthermore, holes may be formed in the surface of the adsorbent container 22 through which the first airflow passes, or the surface of the adsorbent container 22 through which the first airflow passes may be open.

[0017] The adsorbent container 22 contains the adsorbent 21. For example, the adsorbent 21 may fall or roll within the adsorbent container 22 due to its own weight. Air that has entered the adsorbent container 22 comes into contact with the adsorbent 21. By bringing the air into contact with the adsorbent 21, carbon dioxide is adsorbed by the adsorbent 21. That is, by directing the first airflow at the adsorbent 21, the air containing carbon dioxide is brought into contact with the adsorbent 21, and the carbon dioxide is adsorbed by the adsorbent 21. Note that if carbon dioxide adsorption is not performed, the adsorbent container 22 does not need to contain the adsorbent 21.

[0018] Here, the adsorbent container 22 is positioned in a position where it is hit by the first airflow, and therefore the ventilation resistance of the adsorbent container 22 and the adsorbent 21 contained therein reduces the airflow performance of the fluid device 10. The second fan 23 is provided to compensate for the reduction in air volume in the fluid device 10 due to the ventilation resistance of the adsorbent 21 and the adsorbent container 22. The second fan 23 is different from the first fan 12. The first fan 12 is a fan of the fluid device 10. The second fan 23 is a fan that is not a fan of the fluid device 10. For example, the fluid device 10 is an outdoor unit of an air conditioner. The outdoor unit is equipped with a fan and a heat exchanger, and the fan is driven to guide air toward the heat exchanger. The first fan 12 is a fan of this outdoor unit. The second fan 23 is not a fan (first fan 12) installed in the outdoor unit. The second fan 23 is a fan for increasing the amount of air passing through the adsorbent container 22 and suppressing a decrease in air blowing performance due to ventilation resistance caused by the installation of the adsorbent container 22 .

[0019] The second fan 23 is disposed at a position facing a face of the adsorbent container 22 that is different from the face of the adsorbent container 22 that the first fan 12 faces. Specifically, the second fan 23 is disposed to face the adsorbent container 22 in the direction in which the second airflow, which is the airflow generated by the second fan, passes. The second fan 23 is disposed so that the second airflow generated by the second fan 23 passes through the adsorbent container 22. In the present embodiment, the second fan 23 is disposed outside the housing 11. The second fan 23 is disposed upstream of the first fan 12 and the adsorbent container 22 in the flow direction of the first airflow. The second fan 23 is disposed on the opposite side of the adsorbent container 22 from the first fan 12, with the adsorbent container 22 in between.

[0020] The second fan 23 has blades 23a. The blades 23a are rotated about a second rotation axis R2 by a fan motor (not shown). The second fan 23 is an axial fan. The diameter (blade diameter) of the second fan 23 is smaller than the diameter (blade diameter) of the first fan 12. However, the diameter of the second fan 23 may be the same as the diameter of the first fan 12.

[0021] The second fan 23 is disposed adjacent to the adsorbent vessel 22 in the direction along the second rotation axis R2. The second fan 23 is disposed closely or close to the adsorbent vessel 22. The distance between the second fan 23 and the adsorbent vessel 22 is smaller than the distance between the first fan 12 and the adsorbent vessel 22.

[0022] The second fan 23 may be directly attached to the adsorbent container 22. Alternatively, the second fan 23 may be attached to the adsorbent container 22 via an attachment member. For example, the attachment member may be a frame that surrounds the second fan 23, a housing that covers the second fan 23, or the like, and the second fan 23 may be attached to the adsorbent container 22 by fastening the frame, housing, or the like to the adsorbent container 22 with bolts or the like.

[0023] In the present embodiment, the second fan 23 is disposed so that the first rotation axis R1 and the second rotation axis R2 extend in substantially the same direction. The phrase "the first rotation axis R1 and the second rotation axis R2 extend in substantially the same direction" means that the angle between the first rotation axis R1 and the second rotation axis R2 is within 45 degrees. The second fan 23 is disposed so that the position of the first rotation axis R1 and the position of the second rotation axis R2 are different when viewed from the direction along the first rotation axis R1. Note that, as shown in FIG. 2 , the second fan 23 may be disposed so that the position of the first rotation axis R1 and the position of the second rotation axis R2 are the same when viewed from the direction along the first rotation axis R1. The carbon dioxide capture device 20 adsorbs carbon dioxide using the adsorbent 21 contained in the adsorbent container 22 and captures the carbon dioxide from the adsorbent 21 that has adsorbed the carbon dioxide.

[0024] As described above, the carbon dioxide capture device 20 according to this embodiment is provided in a fluid device 10 that has a first fan 12. The carbon dioxide capture device 20 is arranged in a position where it is hit by the first airflow generated by the first fan 12, and has an adsorbent container 22 that can accommodate an adsorbent 21 that can adsorb carbon dioxide, and a second fan 23 that is different from the first fan 12.

[0025] By arranging the adsorbent container 22 capable of containing the adsorbent 21 in a position where the first airflow hits, it is possible to capture carbon dioxide using the airflow energy of the first fan 12. Furthermore, the second fan 23 can compensate for the decrease in air volume in the fluid device 10 due to the ventilation resistance of the adsorbent 21 and the adsorbent container 22. Therefore, it is possible to capture carbon dioxide while suppressing a decrease in the airflow performance of the fluid device 10.

[0026] Furthermore, the second fan 23 is disposed so that the second airflow generated by the second fan 23 passes through the adsorbent container 22. In this case, the amount of air sent to the adsorbent container 22 can be increased, and carbon dioxide can be captured more efficiently.

[0027] Furthermore, the second fan 23 is disposed so as to face the adsorbent container 22. In this case, the amount of air sent to the adsorbent container 22 can be increased, and carbon dioxide can be captured more efficiently.

[0028] Furthermore, the second fan 23 and the adsorbent container 22 are disposed upstream of the first fan 12 in the flow direction of the first airflow. In this case, the amount of air sent to the adsorbent container 22 can be more reliably increased, and carbon dioxide can be more efficiently captured. Furthermore, compared to when the second fan 23 and the adsorbent container 22 are disposed downstream of the first fan 12 in the flow direction of the first airflow, the air velocity distribution at the inlet 13 of the fluid device 10 becomes more uniform, and pressure loss can be reduced.

[0029] The second fan 23 is disposed on the opposite side of the adsorbent container 22 from the first fan 12. In this case, the amount of air sent to the adsorbent container 22 can be more reliably increased, and carbon dioxide can be more efficiently captured.

[0030] Furthermore, the adsorbent container 22 is disposed outside the housing 11 of the fluid device 10. In this case, the adsorbent container 22 can be easily attached (retrofitted) to an existing fluid device 10. Furthermore, the degree of freedom in arranging the adsorbent container 22 is improved.

[0031] Furthermore, the diameter of the second fan 23 is smaller than the diameter of the first fan 12. In this case, the carbon dioxide capture device 20 can be made smaller. Also, the energy consumption of the carbon dioxide capture device 20 can be reduced. This allows carbon dioxide to be captured efficiently.

[0032] Furthermore, the second fan 23 is disposed outside the housing 11 of the fluid device 10. In this case, the second fan 23 can be easily attached (post-installed) to an existing fluid device 10. Furthermore, the degree of freedom in arranging the second fan 23 is improved.

[0033] 3 , the second fan 23 may be disposed inside the housing 11, between the adsorbent container 22 and the first fan 12. For example, when the fluid device 10 is an indoor unit of an air conditioner such as a packaged air conditioner, or a duct ventilation fan, a certain amount of space is secured between the inner surface of the housing 11 and the first fan 12, and therefore, the second fan 23 can be easily disposed inside the housing 11, between the adsorbent container 22 and the first fan 12.

[0034] By disposing the second fan 23 between the adsorbent container 22 and the first fan 12, the amount of air sent to the adsorbent container 22 can be increased, and carbon dioxide can be efficiently captured.

[0035] Second Embodiment Next, a carbon dioxide capture system 1A according to a second embodiment will be described with reference to Fig. 4. The carbon dioxide capture system 1A according to this embodiment has the same basic configuration as that of the first embodiment, and therefore differences will be mainly described.

[0036] 4, in this embodiment, the fluid device 10 is an outdoor unit of an air conditioner, which is a multi-air conditioner for a building. The fluid device 10 has a housing 11, a first fan 12, and a heat exchanger 15.

[0037] In this embodiment, the housing 11 has a rectangular parallelepiped shape having four side surfaces, a top surface, and a bottom surface. The air outlet 14 is formed on the top surface of the housing 11. The air inlets 13 are formed on the side surfaces of the housing 11. Although not shown in FIG. 4 , three air inlets 13 are formed on the three side surfaces of the housing 11.

[0038] Heat exchanger 15 is disposed inside housing 11. Heat exchanger 15 exchanges heat between the air sent by first fan 12 and the refrigerant. Heat exchanger 15 has a substantially U-shape in plan view. Heat exchanger 15 is disposed along the three side surfaces of housing 11 where air inlets 13 are formed.

[0039] The first fan 12 is disposed at the top of the fluid device 10. The first fan 12 is disposed so that a first rotation axis R1 extends in the vertical direction. The first fan 12 is an axial fan. When the first fan 12 is driven, air is drawn into the housing 11 through the air inlet 13. The air drawn into the housing 11 passes through the heat exchanger 15 and is blown out of the housing 11 through the air outlet 14. In this embodiment, air is drawn in through the air inlet 13 formed on the side surface of the housing 11 and blown upward through the air outlet 14 formed on the top surface of the housing 11. In other words, the flow direction of the first airflow curves from the side to the upward direction.

[0040] The adsorbent container 22 is disposed outside the housing 11. In the present embodiment, the adsorbent container 22 is disposed to face at least one of the three side surfaces of the housing 11 on which the suction port 13 is formed. Three adsorbent containers 22 may be provided on the three side surfaces of the housing 11 on which the suction port 13 is formed. The adsorbent container 22 is disposed upstream of the heat exchanger 15 in the flow direction of the first airflow.

[0041] The adsorbent container 22 has a first end 22 a and a second end 22 b in the direction along the first rotation axis R1. The first end 22 a is the end closer to the first fan 12, and the second end 22 b is the end farther from the first fan 12.

[0042] The second fan 23 is disposed outside the housing 11. In this embodiment, the second fan 23 is disposed so that the first rotation axis R1 and the second rotation axis R2 extend in different directions. The first rotation axis R1 and the second rotation axis R2 extend in different directions when the angle between the first rotation axis R1 and the second rotation axis R2 is greater than 45 degrees. In the illustrated example, the angle between the first rotation axis R1 and the second rotation axis R2 is 90 degrees. The second fan 23 is disposed upstream of the heat exchanger 15 and the adsorbent container 22 in the flow direction of the first airflow.

[0043] Here, unevenness occurs in the wind speed distribution of the first airflow at the suction port 13. Specifically, at the suction port 13, the wind speed of the first airflow is higher the closer to the first fan 12 (i.e., the higher), and is lower the farther away from the first fan 12 (i.e., the lower). Therefore, at the suction port 13, the air volume of the first airflow decreases the farther away from the first fan 12. To compensate for this decrease in air volume, the second fan 23 is preferably disposed to face the end of the wind speed distribution of the first airflow at the suction port 13 on the low wind speed side. That is, when viewed from the direction along the second rotation axis R2, the second fan 23 is preferably disposed as far away as possible from the first fan 12 within a range overlapping with the suction port 13. Specifically, the second fan 23 is disposed to face the second end 22b of the adsorbent container 22.

[0044] As described above, in the carbon dioxide capture device 20 according to this embodiment, the second fan 23 is disposed to face the end of the inlet 13 of the fluid device 10 on the side where the wind speed is low in the wind speed distribution of the first airflow. In this case, the second fan 23 can compensate for the decrease in the air volume of the first airflow, thereby improving the air blowing performance of the fluid device 10.

[0045] The second fan 23 is disposed so that the first rotation axis R1 of the first fan 12 and the second rotation axis R2 of the second fan 23 extend in different directions. In this case, it is possible to prevent the first airflow from being disturbed by driving the second fan 23.

[0046] The first fan 12 and the second fan 23 are axial fans. In this case, the air volume blown by the first fan 12 and the second fan 23 can be increased while suppressing pressure loss, thereby improving the air blowing performance and carbon dioxide recovery efficiency of the fluid device 10.

[0047] The second fan 23 is provided to face the second end 22b of the adsorbent container 22, which is one of the two end portions 22a, 22b in the direction along the first rotation axis R1, that is farther from the first fan 12. In this case, the second fan 23 can compensate for the decrease in the air volume of the first airflow, thereby improving the air blowing performance of the fluid device 10.

[0048] The fluid device 10 also has a heat exchanger 15, and the adsorbent container 22 and the second fan 23 are disposed upstream of the heat exchanger 15 in the flow direction of the first airflow. In this case, it is possible to efficiently capture carbon dioxide while increasing the amount of air sent to the heat exchanger 15 by the second fan 23.

[0049] Third Embodiment Next, a carbon dioxide capture system 1B according to a third embodiment will be described with reference to Figures 5A and 5B. The carbon dioxide capture system 1B according to this embodiment has the same basic configuration as that of the first embodiment, and therefore differences will be mainly described.

[0050] 5A and 5B , in this embodiment, the fluid device 10 is an outdoor unit of an air conditioner, such as a package air conditioner or a room air conditioner. The fluid device 10 includes a housing 11, a first fan 12, and a heat exchanger 15.

[0051] The housing 11 is a rectangular parallelepiped having four side surfaces 11a to 11d, a top surface, and a bottom surface. An air outlet 14 is formed in one of the four side surfaces 11a to 11d of the housing 11. An air inlet 13 is formed in the other two of the four side surfaces 11a to 11d of the housing 11, namely, side surfaces 11b and 11c. Of the two side surfaces 11b and 11c on which the air inlet 13 is formed, one side surface 11c faces the side surface 11a on which the air outlet 14 is formed.

[0052] The heat exchanger 15 is disposed inside the housing 11. In a plan view, the heat exchanger 15 has a substantially L-shape. The heat exchanger 15 is disposed along two side surfaces 11b and 11c of the housing 11 where the air inlet 13 is formed.

[0053] The first fan 12 is disposed inside the housing 11. The first fan 12 is an axial fan. When the first fan 12 is driven, air is drawn into the housing 11 through the air inlet 13. The air drawn into the housing 11 passes through the heat exchanger 15 and is blown out of the housing 11 through the air outlet 14.

[0054] The adsorbent container 22 is disposed outside the housing 11. In the present embodiment, the adsorbent container 22 is disposed to face the side surface 11b, which does not face the side surface 11a, of the two side surfaces 11b, 11c of the housing 11 on which the suction port 13 is formed. Two adsorbent containers 22 may be provided on the two side surfaces 11b, 11c of the housing 11 on which the suction port 13 is formed. The adsorbent container 22 is disposed upstream of the heat exchanger 15 in the flow direction of the first airflow.

[0055] The adsorbent container 22 has a first end 22 a and a second end 22 b in the direction along the first rotation axis R1. The first end 22 a is the end closer to the first fan 12, and the second end 22 b is the end farther from the first fan 12.

[0056] The second fan 23 is disposed outside the housing 11. In this embodiment, the second fan 23 is disposed so that the first rotation axis R1 and the second rotation axis R2 extend in different directions. In the illustrated example, the angle between the first rotation axis R1 and the second rotation axis R2 is 90 degrees. The second fan 23 is disposed upstream of the heat exchanger 15 and the adsorbent container 22 in the flow direction of the first airflow.

[0057] As shown in Fig. 5B, in this embodiment, two second fans 23 are arranged spaced apart in the vertical direction. Also, as shown in Fig. 5A, the second fan 23 is provided to face the second end 22b, one of the ends 22a and 22b of the adsorbent container 22, which is farther from the first fan 12. This allows the second fan 23 to compensate for the decrease in the air volume of the first airflow.

[0058] Fourth Embodiment Next, a carbon dioxide capture system 1C according to a fourth embodiment will be described with reference to Figures 6A and 6B. The carbon dioxide capture system 1C according to this embodiment has the same basic configuration as that of the third embodiment, and therefore differences will be mainly described.

[0059] 6A and 6B, in this embodiment, the fluid device 10 is an outdoor unit of an air conditioner, such as a package air conditioner or a room air conditioner. The configuration of the fluid device 10 is the same as that of the third embodiment, and therefore will not be described here.

[0060] In this embodiment, the adsorbent container 22 is disposed to face the side surface 11c, which faces the side surface 11a, of the two side surfaces 11b and 11c in which the suction port 13 is formed in the housing 11.

[0061] The second fan 23 is disposed so that the first rotation axis R1 and the second rotation axis R2 extend in substantially the same direction. As shown in FIG. 6B , in this embodiment, four second fans 23 are provided to face four corners of the adsorbent container 22. The second fans 23 are disposed so that the position of the first rotation axis R1 differs from the position of the second rotation axis R2 when viewed from the direction along the first rotation axis R1. The second fans 23 are disposed so that the first fan 12 and the second fan 23 do not overlap when viewed from the direction along the first rotation axis R1. This allows the second fans 23 to compensate for the decrease in the air volume of the first airflow.

[0062] As described above, in the carbon dioxide capture device 20 according to this embodiment, the second fan 23 is disposed such that the position of the first rotation axis R1 and the position of the second rotation axis R2 are different when viewed from the direction along the first rotation axis R1. In this case, the second fan 23 can compensate for the decrease in the air volume of the first airflow, thereby improving the air blowing performance of the fluid device 10.

[0063] 7A and 7B, a carbon dioxide capture system 1D according to a fifth embodiment will be described. The carbon dioxide capture system 1D according to the present embodiment has the same basic configuration as the third embodiment, and therefore differences will be mainly described.

[0064] 7A and 7B , in this embodiment, the fluid device 10 is an outdoor unit of an air conditioner, such as a package air conditioner or a room air conditioner. The configuration of the fluid device 10 is the same as that of the third embodiment, and therefore will not be described here.

[0065] The adsorbent container 22 is disposed outside the housing 11. In the present embodiment, the adsorbent container 22 is disposed to face the side surface 11a of the housing 11 on which the air outlet 14 is formed. The adsorbent container 22 is disposed downstream of the heat exchanger 15 and the first fan 12 in the flow direction of the first airflow.

[0066] The second fan 23 is disposed outside the housing 11. The second fan 23 is disposed downstream of the adsorbent container 22 in the flow direction of the first airflow.

[0067] The second fan 23 is disposed so that the first rotation axis R1 and the second rotation axis R2 extend in substantially the same direction. As shown in Figures 7A and 7B, in this embodiment, the second fan 23 is disposed so that the first rotation axis R1 and the second rotation axis R2 are aligned with each other when viewed from the direction along the first rotation axis R1. The second fan 23 is disposed so that the first fan 12 and the second fan 23 overlap when viewed from the direction along the first rotation axis R1.

[0068] As described above, in the carbon dioxide capture device 20 according to the present embodiment, the second fan 23 and the adsorbent container 22 are disposed downstream of the first fan 12 in the flow direction of the first airflow. In this case, the degree of freedom in the arrangement of the carbon dioxide capture device 20 is improved.

[0069] Sixth Embodiment Next, a carbon dioxide capture system 1E according to a sixth embodiment will be described with reference to Figures 8A and 8B. The carbon dioxide capture system 1E according to this embodiment has the same basic configuration as that of the first embodiment, and therefore differences will be mainly described.

[0070] 8A and 8B , in this embodiment, the fluid device 10 is an indoor unit of an air conditioner, which is a room air conditioner. The fluid device 10 has a housing 11, a first fan 12, and a heat exchanger 15.

[0071] The housing 11 has a rectangular parallelepiped shape and includes four side surfaces, a top surface 11 f, and a bottom surface 11 e. The top surface 11 f and the bottom surface 11 e are opposed to each other in the vertical direction. An air outlet 14 is formed in the bottom surface 11 e of the housing 11. An air inlet 13 is formed in the top surface 11 f of the housing 11.

[0072] The heat exchanger 15 is disposed inside the housing 11. In a plan view, the heat exchanger 15 is disposed along the bottom surface 11e of the housing 11 where the air outlet 14 is formed.

[0073] In this embodiment, two first fans 12 are disposed inside the housing 11. The two first fans 12 are disposed side by side in the left-right direction. The first fans 12 are axial fans. When the first fans 12 are driven, air is drawn into the housing 11 through the air inlet 13. The air drawn into the housing 11 passes through the heat exchanger 15 and is blown out of the housing 11 through the air outlet 14.

[0074] The adsorbent container 22 is disposed outside the housing 11. In the present embodiment, the adsorbent container 22 is disposed to face the top surface 11f of the housing 11, on which the air inlet 13 is formed. The adsorbent container 22 is disposed upstream of the heat exchanger 15 in the flow direction of the first airflow.

[0075] The second fan 23 is disposed outside the housing 11. The second fan 23 is disposed upstream of the heat exchanger 15 and the adsorbent container 22 in the flow direction of the first airflow.

[0076] The second fan 23 is disposed so that the first rotation axis R1 and the second rotation axis R2 extend in substantially the same direction. As shown in FIG. 8B , in this embodiment, two second fans 23 are disposed spaced apart in the depth direction. The depth direction is a direction perpendicular to the up-down direction and the left-right direction. The second fan 23 is disposed so that the position of the first rotation axis R1 and the position of the second rotation axis R2 differ when viewed from the direction along the first rotation axis R1. The second fan 23 is disposed between the two first fans 12. The second fan 23 is disposed so that the first fan 12 and the second fan 23 do not overlap when viewed from the direction along the first rotation axis R1. This allows the second fan 23 to compensate for the decrease in the air volume of the first airflow.

[0077] Seventh Embodiment Next, a carbon dioxide capture system 1F according to a seventh embodiment will be described with reference to Figures 9A and 9B. The carbon dioxide capture system 1F according to this embodiment has the same basic configuration as that of the first embodiment, and therefore differences will be mainly described.

[0078] 9A and 9B , in this embodiment, the fluid device 10 is an indoor unit of an air conditioner, which is a package air conditioner. The fluid device 10 has a housing 11, a first fan 12, and a heat exchanger 15.

[0079] Housing 11 is a rectangular parallelepiped having a bottom surface 11e, four side surfaces, and a top surface. Intake port 13 and outlet port 14 are formed in bottom surface 11e of housing 11. Intake port 13 is provided in the center of bottom surface 11e, and outlet port 14 is provided to surround intake port 13.

[0080] In this embodiment, the first fan 12 is disposed so that the first rotation axis R1 of the first fan 12 extends in the vertical direction. In the following description, a cross section perpendicular to the direction along the first rotation axis R1 is referred to as a transverse cross section. In a transverse cross section of the carbon dioxide capture system 1F, a direction perpendicular to the first rotation axis R1 is referred to as a radial direction. A direction along the radial direction approaching the first rotation axis R1 is referred to as a radially inner direction, and a direction away from the first rotation axis R1 is referred to as a radially outer direction. The first fan 12 is a centrifugal fan. That is, the first fan 12 draws air from the room through the air inlet 13 and sends the air radially outward.

[0081] Heat exchanger 15 has a rectangular frame shape when viewed from the direction along first rotation axis R1, and surrounds first fan 12 from the radial outside. When first fan 12 is driven, air is drawn into housing 11 through air inlet 13. The air drawn into housing 11 passes through heat exchanger 15 and is blown out of housing 11 through air outlet 14.

[0082] The adsorbent container 22 is disposed outside the housing 11. In the present embodiment, the adsorbent container 22 is disposed so as to face the center of the bottom surface 11e of the housing 11 (i.e., the suction port 13). The adsorbent container 22 is disposed upstream of the heat exchanger 15 in the flow direction of the first airflow.

[0083] The second fan 23 is disposed outside the housing 11. The second fan 23 is disposed upstream of the heat exchanger 15 and the adsorbent container 22 in the flow direction of the first airflow.

[0084] The second fans 23 are disposed so that the first rotation axis R1 and the second rotation axis R2 extend in substantially the same direction. As shown in FIG. 9B , in this embodiment, four second fans 23 are provided to face four corners of the adsorbent container 22. The second fans 23 are disposed so that the position of the first rotation axis R1 and the position of the second rotation axis R2 differ when viewed from the direction along the first rotation axis R1. The second fans 23 are disposed so that the first fan 12 and the second fan 23 do not overlap when viewed from the direction along the first rotation axis R1. This allows the second fans 23 to compensate for the decrease in the air volume of the first airflow.

[0085] 10A and 10B , the adsorbent container 22 and the second fan 23 may be disposed inside the housing 11. The second fan 23 may be disposed between the adsorbent container 22 and the first fan 12.

[0086] By arranging the adsorbent container 22 inside the housing 11, it is possible to prevent the aesthetic appeal of the external appearance of the carbon dioxide capture system 1E in which the carbon dioxide capture device 20 is provided from being impaired.

[0087] By disposing the second fan 23 inside the housing 11, it is possible to prevent the aesthetic appeal of the external appearance of the carbon dioxide capture system 1E provided with the carbon dioxide capture device 20 from being impaired. In addition, it is possible to prevent external objects from coming into contact with the second fan 23.

[0088] Eighth Embodiment Next, a carbon dioxide capture system 1G according to an eighth embodiment will be described with reference to Figures 11A and 11B. The carbon dioxide capture system 1G according to this embodiment has the same basic configuration as that of the first embodiment, and therefore differences will be mainly described.

[0089] As shown in FIGS. 11A and 11B, in this embodiment, the fluid device 10 is a ventilation fan.

[0090] The housing 11 has a rectangular parallelepiped shape with a front surface, a rear surface, and four side surfaces. An air inlet 13 is formed in the front surface of the housing 11, and an air outlet 14 is formed in the rear surface of the housing 11. The first fan 12 is an axial flow fan.

[0091] The adsorbent container 22 is disposed outside the housing 11. In this embodiment, the adsorbent container 22 is disposed so as to face the front surface of the housing 11 where the suction port 13 is formed.

[0092] The second fan 23 is disposed outside the housing 11. The second fan 23 is disposed so that the first rotation axis R1 and the second rotation axis R2 extend in substantially the same direction. As shown in Fig. 11B, in this embodiment, two second fans 23 are provided. The second fans 23 are disposed so that the positions of the first rotation axis R1 and the second rotation axis R2 are different when viewed from the direction along the first rotation axis R1. This allows the second fans 23 to compensate for the decrease in the air volume of the first airflow.

[0093] 12A and 12B , one second fan 23 may be arranged such that the first rotation axis R1 and the second rotation axis R2 are aligned when viewed along the first rotation axis R1. In the wind speed distribution of the first airflow at the air inlet 13 or the air outlet 14, the wind speed is also low in the center of the air inlet 13 or the air outlet 14 (i.e., the portion overlapping with the first rotation axis R1 when viewed along the first rotation axis R1). By arranging the second fan 23 such that the first rotation axis R1 and the second rotation axis R2 are aligned when viewed along the first rotation axis R1, the second fan 23 can compensate for the decrease in the air volume of the first airflow.

[0094] Ninth embodiment Next, a carbon dioxide capture system 1H according to a ninth embodiment will be described with reference to Figures 13A and 13B. The carbon dioxide capture system 1H according to this embodiment has the same basic configuration as that of the first embodiment, and therefore differences will be mainly described.

[0095] As shown in FIGS. 13A and 13B, in this embodiment, the fluid device 10 is a duct ventilation fan.

[0096] The housing 11 is a rectangular parallelepiped having four side surfaces, a bottom surface, and a top surface. An air inlet 13 is formed in the bottom surface of the housing 11. An air outlet 14 is formed in the side surface of the housing 11. An exhaust duct 16 is connected to the air outlet 14.

[0097] In this embodiment, first fan 12 is disposed so that first axis of rotation R1 extends in the vertical direction. First fan 12 is a centrifugal fan. That is, first fan 12 draws air from the room through air inlet 13 and sends the air radially outward.

[0098] The adsorbent container 22 is disposed outside the housing 11. In this embodiment, the adsorbent container 22 is disposed so as to face the bottom surface of the housing 11 on which the suction port 13 is formed.

[0099] The second fan 23 is disposed outside the housing 11. The second fan 23 is disposed so that the first rotation axis R1 and the second rotation axis R2 extend in substantially the same direction. As shown in FIG. 13B , in this embodiment, four second fans 23 are provided to face four corners of the adsorbent container 22. The second fans 23 are disposed so that the position of the second rotation axis R2 of the second fan 23 differs from the position of the first rotation axis R1 of the first fan 12 when viewed from the direction along the first rotation axis R1. This allows the second fans 23 to compensate for the decrease in the air volume of the first airflow.

[0100] Tenth Embodiment Next, a carbon dioxide capture system 1I according to a tenth embodiment will be described with reference to Figures 14A to 14C. The carbon dioxide capture system 1I according to this embodiment has the same basic configuration as that of the second embodiment, and therefore differences will be mainly described.

[0101] As shown in Figures 14A to 14C, in this embodiment, the fluid device 10 is an outdoor unit of an air conditioner, which is a multi-air conditioner for a building. Note that Figure 14A shows a top view of the portion of the carbon dioxide capture system 1I that faces the fluid device 10, and a cross-sectional view of the portion that faces the carbon dioxide capture device 20. The configuration of the fluid device 10 is the same as in embodiment 2, so a description thereof will be omitted here.

[0102] In this embodiment, the carbon dioxide capture device 20 further includes a mounting plate 24 in addition to the adsorbent 21 , the adsorbent container 22 , and the second fan 23 .

[0103] The mounting plate 24 is fixed to the adsorbent container 22. The mounting plate 24 is provided so that the plate surface of the mounting plate 24 is perpendicular to the side surface of the housing 11 that faces the adsorbent container 22. The mounting plate 24 may be fixed to the housing 11. The mounting plate 24 is provided with a through-hole 24a that penetrates the mounting plate 24 in the plate thickness direction.

[0104] The second fan 23 is attached to the mounting plate 24. When viewed from the thickness direction of the mounting plate 24, the second fan 23 is arranged to overlap the through-hole 24a. As shown in FIG. 14A , the second fan 23 is attached to the mounting plate 24 on the suction port 13 side of the fluid device 10, at a position different from the air path of the first airflow. The second fan 23 supplies air to the air path of the first airflow. In other words, the second airflow generated by the second fan 23 flows toward the air path of the first airflow. Therefore, the second fan 23 is arranged so that the second airflow generated by the second fan 23 passes through the adsorbent container 22.

[0105] The second fan 23 is disposed so that the first rotation axis R1 and the second rotation axis R2 extend in different directions. The second fan 23 is disposed so that the second rotation axis R2 extends in a direction perpendicular to the plate surface of the mounting plate 24.

[0106] As described above, the carbon dioxide capture device 20 according to this embodiment further includes a mounting plate 24 that is fixed to the adsorbent container 22 or the housing 11 of the fluid device 10 and to which the second fan 23 is attached. The second fan 23 is attached to the mounting plate 24 on the inlet 13 side of the fluid device 10 and at a position different from the air path of the first airflow, and supplies air to the air path of the first airflow. In this case, the second fan 23 can compensate for the decrease in air volume due to the ventilation resistance of the adsorbent 21 in the fluid device 10. Furthermore, because the second fan 23 is attached to the mounting plate 24 at a position different from the air path of the first airflow, the second fan 23 can be prevented from affecting the air volume of the first airflow even when the second fan 23 is stopped. Therefore, a decrease in the air blowing performance of the fluid device 10 can be suppressed.

[0107] As shown in Figures 15A to 15C, a waterproof cover 25 may be attached to the mounting plate 24. In Figure 15A, the portion of the carbon dioxide capture system 1I on the fluid device 10 side is shown as a top view, and the portion on the carbon dioxide capture device 20 side is shown as a cross-sectional view. The waterproof cover 25 is provided to surround the second fan 23. A through hole 25a is formed in the waterproof cover 25. In other words, the waterproof cover 25 is breathable. When viewed from the second rotation axis R2, the through hole 25a is positioned to overlap with the second fan 23.

[0108] As described above, the carbon dioxide capture device 20 further includes the waterproof cover 25, which is breathable and is provided to surround the second fan 23. In this case, a fan that does not have a waterproof function can be used as the second fan 23, and the carbon dioxide capture device 20 can be provided at low cost.

[0109] The technical scope of the present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present disclosure.

[0110] For example, in the ninth embodiment, the adsorbent container 22 and the second fan 23 may be disposed inside the housing 11 .

[0111] In addition, the above-described embodiments and modifications may be combined as appropriate.

[0112] For example, any of the third to ninth embodiments may be combined with the tenth embodiment. Specifically, in the third to ninth embodiments, the carbon dioxide capture device 20 may further include a mounting plate 24, and the second fan 23 may be attached to the mounting plate 24 on the side of the inlet 13 of the fluid device 10 and at a position different from the air path of the first airflow, and supply air to the air path of the first airflow. The carbon dioxide capture device 20 may also further include a waterproof cover 25.

[0113] DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I... Carbon dioxide capture system, 10... Fluid equipment, 11... Housing, 12... First fan, 13... Intake port, 14... Outlet, 15... Heat exchanger, 20... Carbon dioxide capture device, 21... Adsorbent, 22... Adsorbent container, 23... Second fan, 24... Mounting plate, 25... Waterproof cover, R1... First rotation axis, R2... Second rotation axis

Claims

1. A carbon dioxide capture device provided in a fluid device having a first fan, the carbon dioxide capture device having: an adsorbent container that is arranged in a position where it is hit by a first airflow generated by the first fan and that is capable of containing an adsorbent capable of adsorbing carbon dioxide; and a second fan that is different from the first fan.

2. The carbon dioxide capture apparatus of claim 1, wherein the second fan is positioned such that a second airflow generated by the second fan passes through the adsorber vessel.

3. The carbon dioxide capture device according to claim 2, wherein the second fan is disposed so as to face the adsorbent container.

4. A carbon dioxide capture device as described in claim 2 or 3, wherein the second fan and the adsorbent container are disposed upstream of the first fan in the flow direction of the first airflow.

5. A carbon dioxide recovery device as described in claim 2 or 3, wherein the second fan and the adsorbent container are disposed downstream of the first fan in the flow direction of the first airflow.

6. A carbon dioxide recovery device according to any one of claims 2 to 5, wherein the second fan is disposed on the opposite side of the adsorbent container from the first fan.

7. A carbon dioxide capture device according to any one of claims 2 to 5, wherein the second fan is disposed between the adsorbent container and the first fan.

8. A carbon dioxide capture device as described in claim 6 or 7, wherein the adsorbent container is disposed outside the housing of the fluid device.

9. A carbon dioxide capture device as described in claim 6 or 7, wherein the adsorbent container is disposed inside the housing of the fluid device.

10. A carbon dioxide capture device as described in claim 8 or 9, wherein the second fan is positioned to face the end at the inlet of the fluid device where the wind speed is lower in the wind speed distribution of the first airflow.

11. The carbon dioxide capture device according to claim 10, wherein the second fan is arranged such that a first rotational axis of the first fan and a second rotational axis of the second fan extend in different directions.

12. The carbon dioxide capture device according to claim 11, wherein the first fan and the second fan are axial fans.

13. A carbon dioxide recovery device as described in claim 11 or 12, wherein the second fan is arranged to face one of both end portions of the adsorbent container in the direction along the first rotation axis that is away from the first fan.

14. The carbon dioxide capture device according to claim 10, wherein the second fan is arranged such that a first rotational axis of the first fan and a second rotational axis of the second fan extend in substantially the same direction.

15. A carbon dioxide capture device as described in claim 14, wherein the second fan is positioned such that, when viewed from a direction along the first rotational axis, the position of the first rotational axis and the position of the second rotational axis are different.

16. A carbon dioxide recovery device described in any one of claims 1 to 15, wherein the fluid equipment has a heat exchanger, and the adsorbent container and the second fan are positioned upstream of the heat exchanger in the flow direction of the first airflow.

17. A carbon dioxide capture device as described in claim 2, further comprising a mounting plate that is fixed to the adsorbent container or the housing of the fluid device and to which the second fan is attached, the second fan being attached to the mounting plate on the suction port side of the fluid device and at a position different from the air path of the first airflow, and supplying air to the air path.

18. The carbon dioxide capture device according to claim 17, further comprising a waterproof cover having breathability and arranged to surround the second fan.

19. A carbon dioxide capture device as described in any one of claims 1 to 18, wherein the diameter of the second fan is smaller than the diameter of the first fan.

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