Carbon dioxide concentration reduction device

Abstract

A carbon dioxide concentration reduction device 1 which is installed in a device including an air suction part and an air discharge part, and which comprises an adsorption member 103 that adsorbs carbon dioxide contained in air suctioned by the device.

Description

Carbon dioxide concentration reduction device

[0001] The present disclosure relates to a carbon dioxide concentration reduction device.

[0002] There are devices for recovering carbon dioxide (see Non-Patent Documents 1 and 2).

[0003] “Hiyassy”, Carbon Capture Technology Research Institute, [online], [searched on March 25, 2020], <URL: https: / / www.hiyassy.com / > “direct air capture and storage (DAC+S)”, Climeworks, [online], [searched on March 25, 2020], <URL: https: / / climeworks.com / >

[0004] However, conventional carbon dioxide capture devices are large in scale and expensive.

[0005] The present disclosure has been made in consideration of the above circumstances, and an object of the present disclosure is to provide a technology that can suppress an increase in carbon dioxide concentration easily and at low cost.

[0006] A carbon dioxide concentration reduction device according to one aspect of the present disclosure is installed in a device having an air intake section and an air discharge section, and includes an adsorption member that adsorbs carbon dioxide contained in the air drawn into the device.

[0007] According to the present disclosure, a technology that can suppress an increase in carbon dioxide concentration easily and at low cost can be provided.

[0008] Fig. 1 is a diagram showing an example of the configuration of a carbon dioxide concentration reduction device according to a first embodiment. Fig. 2 is a side view of a carbon dioxide adsorption sheet and its fixing base. Fig. 3 is a diagram showing an example of the configuration of a carbon dioxide concentration reduction device according to a second embodiment. Fig. 4 is a diagram showing an installation example of a carbon dioxide concentration reduction device according to the second embodiment. Fig. 5 is a diagram showing an example of the configuration of a carbon dioxide concentration reduction device according to a third embodiment.

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the description of the drawings, the same parts are designated by the same reference numerals and the description thereof will be omitted.

[0010] [Summary of the present disclosure] The present disclosure utilizes the existing air circulation function to easily and inexpensively suppress an increase in carbon dioxide concentration by installing a carbon dioxide adsorption member (e.g., a carbon dioxide adsorption sheet or a carbon dioxide adsorption powder) inside a device equipped with an air convection function.

[0011] The industrial value of this disclosure lies in providing comfort and improving concentration for people in enclosed spaces. When applied outdoors, the technology of this disclosure can contribute to preventing global warming by reducing carbon dioxide in the atmosphere.

[0012] First Embodiment FIG. 1 is a diagram showing an example of the configuration of a carbon dioxide concentration reducing apparatus 1 according to a first embodiment.

[0013] This carbon dioxide concentration reducing device 1 is a device basically composed of an air purifier 500 installed indoors, and is a device that circulates the air in the room to reduce the carbon dioxide concentration in the room.

[0014] This carbon dioxide concentration reduction device 1 comprises an air suction section 101 that sucks in air from within the room, a dust removal filter 102 that removes dust contained in the sucked air, a carbon dioxide adsorption sheet 103 that adsorbs some of the carbon dioxide contained in the air after dust removal, a material leakage prevention filter 104 that prevents the adsorption material that makes up the carbon dioxide adsorption sheet 103 from leaking out of the carbon dioxide concentration reduction device 1, and an air discharge section 105 that discharges air with a reduced carbon dioxide concentration from within the carbon dioxide concentration reduction device 1 into the room.

[0015] The air suction unit 101 draws in indoor air in the direction indicated by the arrows in the figure, and the air discharge unit 105 discharges the air in the same direction. At this time, the drawn-in air is passed through a carbon dioxide adsorption sheet 103 to reduce the carbon dioxide concentration in the air. This carbon dioxide adsorption sheet 103 is an adsorption member that adsorbs carbon dioxide contained in the air and allows all other gases to pass through. In this way, the carbon dioxide concentration in the room can be reduced by utilizing the circulation of air in the room.

[0016] The carbon dioxide concentration reducing device 1 may be provided with the air suction unit 101 and the air discharge unit 105 itself, but the carbon dioxide concentration reducing device 1 may also use the units provided in the air purifier 500. That is, the carbon dioxide adsorption sheet 103 according to this embodiment is disposed between the air suction unit 101 and the air discharge unit 105 provided in the air purifier 500. This makes it possible to reduce the carbon dioxide concentration using the existing air circulation function.

[0017] The carbon dioxide concentration reduction device 1 according to this embodiment can be used not only in the air purifier 500 but also in air conditioners (air circulation devices) such as air conditioners and electric fans. The carbon dioxide concentration reduction device 1 according to this embodiment may also be constructed using components of the air purifier 500. For example, the dust removal filter 102 can be the same as the dust removal filter of the air purifier 500.

[0018] The dust removal filter 102 is disposed between the air suction unit 101 and the carbon dioxide adsorption sheet 103. The dust removal filter 102 is, for example, a nonwoven fabric or mesh filter. The dust removal filter 102 is not necessarily provided. However, it is preferable to provide the dust removal filter 102, as this can prevent dust from adhering to the carbon dioxide adsorption sheet 103 and maximize the carbon dioxide adsorption capacity of the carbon dioxide adsorption sheet 103.

[0019] The component outflow prevention filter 104 is disposed between the carbon dioxide adsorption sheet 103 and the air discharge portion 105. The component outflow prevention filter 104 is not necessarily provided. However, it is preferable to provide the component outflow prevention filter 104 in order to prevent the detached component from leaking into the room when a part of the adsorption component accidentally peels off from the carbon dioxide adsorption sheet 103.

[0020] The carbon dioxide adsorption sheet 103 can be any existing carbon dioxide adsorption sheet. It is preferable to use one that has high carbon dioxide adsorption capacity at room temperature. For example, the carbon dioxide adsorption sheet "Carbon dioxide (CO2) adsorption / desorption material," JGC-Universal Corporation, [online], [searched July 16, 2024], <URL: https: / / www.nu.co.jp / jp / products / carbonfree / CO2 / > is preferable.

[0021] 2 is a side view of the carbon dioxide adsorption sheet 103 and a fixing base 106 for the carbon dioxide adsorption sheet 103. The fixing base 106 for fixing the carbon dioxide adsorption sheet 103 inside the carbon dioxide concentration reduction device 1 preferably has a mesh structure that allows air to pass through. If the fixing base 106 has a mesh structure, the carbon dioxide adsorption sheet 103 can be easily installed and replaced, and is easy to handle.

[0022] There are no limitations on the installation or mounting method of the carbon dioxide adsorption sheet 103. However, in order to obtain a high carbon dioxide adsorption amount, it is preferable to install it so that the contact area with the air is as large as possible. For example, it is possible to install the carbon dioxide adsorption sheet 103 so that the sheet surface is perpendicular to the direction of air flow. Alternatively, the size of the sheet surface may be increased.

[0023] According to this embodiment, the carbon dioxide adsorption sheet 103 is placed between the air suction section 101 and the air discharge section 105 of the air purifier 500, so that the increase in the carbon dioxide concentration in the room can be suppressed easily and at low cost by utilizing the existing air circulation function. This is a very inexpensive and simple environmental purification method that can prevent global warming.

[0024] Second Embodiment FIG. 3 is a diagram showing an example of the configuration of a carbon dioxide concentration reducing apparatus 1 according to a second embodiment.

[0025] This carbon dioxide concentration reducing device 1 is a device whose basic configuration is an automobile 600 that runs outdoors, and is a device that circulates outdoor air to reduce the outdoor carbon dioxide concentration.

[0026] This carbon dioxide concentration reduction device 1 comprises an air suction section 101 that draws in outdoor air, a plurality of carbon dioxide adsorption sheets 103 that adsorb some of the carbon dioxide contained in the drawn air, and an air discharge section 105 that discharges the air after the carbon dioxide concentration has been reduced from within the carbon dioxide concentration reduction device 1 to the outdoors.

[0027] The carbon dioxide concentration reducing device 1 further includes a plurality of hollow passages 107 between the air suction section 101 and the air discharge section 105, which guide the air sucked by the air suction section 101 to the air discharge section 105. The plurality of carbon dioxide adsorption sheets 103 are installed in at least some or all of the plurality of hollow passages 107.

[0028] While the automobile 600 is running, the air suction unit 101 draws in outdoor air in the direction indicated by the arrows in the figure, and the air discharge unit 105 discharges the air in the same direction. At this time, a carbon dioxide adsorption sheet 103 is installed on at least a portion of the surface that comes into contact with the air passing through the hollow passage 107, and the carbon dioxide concentration is reduced by bringing the air into contact with the carbon dioxide adsorption sheet 103. In this way, the outdoor carbon dioxide concentration can be reduced by utilizing the circulation of outdoor air.

[0029] The carbon dioxide concentration reducing device 1 may be provided with the air suction unit 101 and the air discharge unit 105 itself, but in this embodiment, those provided in the automobile 600 are used. That is, the carbon dioxide adsorption sheet 103 according to this embodiment is disposed between the air suction unit 101 and the air discharge unit 105 provided in the automobile 600. This makes it possible to reduce the carbon dioxide concentration by taking in outdoor air as the automobile 600 moves.

[0030] The carbon dioxide concentration reduction device 1 according to this embodiment can be used not only in the automobile 600 but also in mobile objects such as drones and robots that have an air intake section and an exhaust section. The carbon dioxide concentration reduction device 1 according to this embodiment may also be constructed using components of the automobile 600.

[0031] An existing carbon dioxide adsorption sheet can be used as the carbon dioxide adsorption sheet 103, but one having high carbon dioxide adsorption capacity at room temperature is preferred. For example, the carbon dioxide adsorption sheet described in the above-mentioned Reference 1 is preferred because it can exhibit adsorption capacity even in a humid environment and for low-concentration carbon dioxide.

[0032] 4 is a diagram showing an example of installation of the carbon dioxide adsorption sheet 103 according to this embodiment. In the case of an automobile 600, it is preferable to install the carbon dioxide adsorption sheet 103 at a position inside the front hood where air passes through. Considering the ease of installation and replacement of the carbon dioxide adsorption sheet 103, it is preferable to install it on a part of the back surface 600' of the hood, which has a simple surface structure.

[0033] There are no limitations on the installation method, attachment method, or attachment location of the carbon dioxide adsorption sheet 103. As described above, the carbon dioxide adsorption sheet 103 may be installed on at least a part or all of the surface that comes into contact with air passing through the carbon dioxide concentration reduction device 1, but it is preferable to install it over as large an area as possible in order to obtain a high carbon dioxide adsorption amount.

[0034] According to this embodiment, the carbon dioxide adsorption sheet 103 is placed between the air intake section 101 and the air discharge section 105 of the automobile 600, and thus the increase in the carbon dioxide concentration outdoors can be suppressed easily and at low cost by taking advantage of the feature that the automobile 600 takes in outdoor air as it moves. This is a very inexpensive and simple environmental purification method that can prevent global warming.

[0035] Third Embodiment FIG. 5 is a diagram showing the configuration of a carbon dioxide concentration reducing apparatus 1 according to a third embodiment.

[0036] This carbon dioxide concentration reducing device 1 is also a device basically composed of an automobile 600 that runs outdoors, and is a device that circulates outdoor air to reduce the outdoor carbon dioxide concentration.

[0037] This carbon dioxide concentration reduction device 1 comprises a plurality of carbon dioxide adsorption powders 103′ that adsorb carbon dioxide contained in the air, a rectangular housing 108 that holds the plurality of carbon dioxide adsorption powders 103′, a weight sensor 109 that measures the weight of the carbon dioxide adsorption powder 103′, a calculation unit 110 that calculates the amount of carbon dioxide adsorbed by the carbon dioxide adsorption powder 103′ and the remaining amount of carbon dioxide that can be adsorbed by the carbon dioxide adsorption powder 103′ from the measured weight of the carbon dioxide adsorption powder 103′, a monitor 111 that displays the calculation results, etc., and an automatic opening and closing door 112 for removing the carbon dioxide adsorption powder 103′ that has already adsorbed carbon dioxide from inside the housing 108 to the outside.

[0038] A plurality of air suction sections 101 are formed on the side surface of the housing 108 on the air suction side, and a plurality of air discharge sections 105 are formed on the opposite side surface. The housing 108 is installed on a part of the underside 600' of the hood so that the surface on which the air suction sections 101 are formed faces the front of the automobile 600.

[0039] The carbon dioxide adsorbent powder 103' is filled in the housing 108 and comes into contact with the air taken into the housing 108. The carbon dioxide adsorbent powder 103' is preferably in a solid powder state at room temperature and reacts with carbon dioxide in the air to adsorb carbon dioxide. For example, calcium hydroxide (Ca(OH) ２ ) is carbon dioxide (CO ２ ) to produce calcium carbonate (CaCO), which is used for various purposes. ３ ) is preferable.

[0040] The weight sensor 109 measures the weight of the carbon dioxide adsorption powder 103'. The calculation unit 110 calculates the amount of carbon dioxide adsorbed by the carbon dioxide adsorption powder 103' from the measured weight and change in weight of the carbon dioxide adsorption powder 103', and calculates the remaining amount of carbon dioxide that can be adsorbed by the carbon dioxide adsorption powder 103'. These pieces of information are displayed on a monitor 111 inside the vehicle 600''.

[0041] The housing 108 has a structure that allows it to slide due to acceleration / deceleration of the automobile 600 or vibration of the underside 600' of the hood. With this structure, the carbon dioxide concentration reducing device 1 can automatically agitate the carbon dioxide adsorption powder 103', that is, simply by driving the automobile, and bring the carbon dioxide adsorption powder 103' that has not yet adsorbed carbon dioxide into contact with carbon dioxide. In other words, the housing 108 has a function of agitating the carbon dioxide adsorption powder 103'.

[0042] The housing 108 is provided with an automatic opening and closing door 112 for scattering the carbon dioxide adsorption powder 103′ that has already adsorbed carbon dioxide outside the carbon dioxide concentration reduction apparatus 1. In this way, the carbon dioxide adsorption powder 103′ (for example, CaCO ３ The carbon dioxide adsorption powder 103′ can be used as fertilizer and can be spread wherever desired. For example, it can be used to improve the soil in fields and rice paddies. That is, the housing 108 has a function of spreading the carbon dioxide adsorption powder 103′ that has adsorbed carbon dioxide.

[0043] According to this embodiment, since the carbon dioxide adsorption powder 103' has a function of stirring, the outdoor carbon dioxide concentration can be reliably and sufficiently reduced, and an increase in the outdoor carbon dioxide concentration can be reliably suppressed.

[0044] Furthermore, according to this embodiment, since the carbon dioxide adsorption powder 103' that has adsorbed carbon dioxide is dispersed, the carbon dioxide adsorption powder 103' can be utilized after adsorbing carbon dioxide.

[0045] Furthermore, according to this embodiment, the calculation unit 110 is provided which calculates the amount of carbon dioxide adsorbed by the carbon dioxide adsorption powder 103′ and the remaining amount of carbon dioxide that can be adsorbed by the carbon dioxide adsorption powder 103′, so that the carbon dioxide concentration can be determined, and the time to replace the carbon dioxide adsorption powder 103′ can be determined.

[0046] REFERENCE SIGNS LIST 1 Carbon dioxide concentration reduction device 101 Air suction section 102 Dust removal filter 103 Carbon dioxide adsorption sheet 103' Carbon dioxide adsorption powder 104 Filter for preventing component leakage 105 Air discharge section 106 Fixing base for carbon dioxide adsorption sheet 107 Hollow passage 108 Housing 109 Weight sensor 110 Calculation section 111 Monitor 112 Automatic opening and closing door 500 Air purifier 600 Automobile 600' Underside of hood 600'' Vehicle interior

Claims

1. A carbon dioxide concentration reduction device comprising: an adsorption member that is installed in a device having an air intake section and an air discharge section, and that adsorbs carbon dioxide contained in the air drawn into the device.

2. A carbon dioxide concentration reduction device as described in claim 1, wherein the adsorption member is an adsorption sheet that adsorbs carbon dioxide contained in the air and allows everything except carbon dioxide to pass through, or an adsorption powder that reacts with carbon dioxide contained in the air to adsorb the carbon dioxide.

3. A carbon dioxide concentration reduction device as described in claim 1, wherein the adsorption member is installed in all or part of the path through which the air passes.

4. The carbon dioxide concentration reduction device of claim 1, further comprising: a nonwoven fabric or mesh filter arranged between the suction section and the discharge section; and a filter arranged between the adsorption member and the discharge section to prevent the adsorption member from leaking out.

5. A carbon dioxide concentration reducing device as described in claim 1, further comprising: a function of stirring the adsorption powder which is the adsorption member; and a function of scattering the adsorption powder which has adsorbed carbon dioxide contained in the air.

6. The carbon dioxide concentration reducing device according to claim 5, wherein the adsorbent powder is calcium hydroxide.

7. The carbon dioxide concentration reducing device according to claim 1, further comprising a calculation unit that calculates the amount of carbon dioxide adsorbed by the adsorption member and the remaining amount of carbon dioxide that can be adsorbed by the adsorption member.

8. The carbon dioxide concentration reducing device according to claim 1, wherein the device is an air conditioner or a mobile object.

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