IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0555993
(2004-05-13)
|
등록번호 |
US-7601189
(2009-10-28)
|
우선권정보 |
FI-20030717(2003-05-13); FI-20031207(2003-08-28) |
국제출원번호 |
PCT/FI04/000290
(2004-05-13)
|
§371/§102 date |
20061107
(20061107)
|
국제공개번호 |
WO04/101113
(2004-11-25)
|
발명자
/ 주소 |
- Lampinen, Markku
- Anttila, Tomi
- Rauhala, Keijo
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
8 |
초록
▼
A filtering method and a filter device (10) for removing impurities from the breathing air (24) in a room, an air raid shelter or a vehicle. According to the filtering method, the air to be filtered is driven through a carbon dioxide filter (13) by a fan (15), with the result that at least a portion
A filtering method and a filter device (10) for removing impurities from the breathing air (24) in a room, an air raid shelter or a vehicle. According to the filtering method, the air to be filtered is driven through a carbon dioxide filter (13) by a fan (15), with the result that at least a portion of the carbon dioxide and/or mold spores and other impurities in the air are trapped in the carbon dioxide filter. After the filtering, the filter is regenerated and the carbon dioxide and/or mold spores trapped in it are removed by a technique whereby air heated by a thermal resistor (20) is passed through the filter, this air preferably consisting of the same air to be filtered.
대표청구항
▼
The invention claimed is: 1. A filtering method for removing impurities from air (24) circulating within a limited space, such as a room, an air raid shelter or a vehicle, according to which filtering method the air (24) to be filtered containing carbon dioxide and impurities generated within the l
The invention claimed is: 1. A filtering method for removing impurities from air (24) circulating within a limited space, such as a room, an air raid shelter or a vehicle, according to which filtering method the air (24) to be filtered containing carbon dioxide and impurities generated within the limited space is passed through a filter (13), whereby at least a portion of the carbon dioxide and impurities in the air is trapped in the filter, and after the filtering, the filter (13) is regenerated to remove the carbon dioxide and impurities trapped in the filter by passing a gaseous regenerating medium through the filter, characterized in that the filter (13) is a carbon dioxide filter (13) for trapping and removing carbon dioxide and the air (24) to be filtered is passed through the carbon dioxide filter (13), so that at least a portion of the carbon dioxide in the air is trapped in the filter and removed from the air (24), and after the filtering, the carbon dioxide filter (13) is regenerated by removing the carbon dioxide trapped in the filter by a technique whereby air (24) that, prior to being conducted to the filter, has been heated to a temperature of 50-200° C., is passed through the filter. 2. A filtering method according to claim 1, wherein the carbon dioxide filter traps and removes particles including mold spores and cigarette smoke from the air of the limited space. 3. A filtering method according to claim 1, characterized in that the carbon dioxide filter (13) is regenerated by passing through it unpurified air (24) generated within said limited space, and that prior to being fed into the filter, the air is heated to a temperature of 50-200° C. 4. A filtering method according to claim 1, wherein in the step of regenerating the carbon dioxide filter (13), the heated air (24) passed through the filter from said limited space, and together with it the carbon dioxide and/or particles are removed into outdoor air. 5. A filtering method according to claim 1, comprising removing the carbon dioxide filter from said limited space and passing outdoor air through the filter that, prior to being fed into the filter, is heated to a temperature of 50-200° C. 6. A filter device (10) for removing impurities from air (24) circulating within a limited space, such as a room, an air raid shelter or a vehicle, said filter device comprising a filter (13), a first opening (14) for admitting the air (24) of the space to be filtered into the filter (13), a second opening (16) for passing the air filtered through the filter (13) back into the air space of the space to be filtered, an operating device (15) for driving the air through the filter (13), and regenerating equipment for regenerating the filter (13) with a gaseous medium, characterized in that the filter (13) of the filter device (10) is a carbon dioxide filter (13) for trapping and removing carbon dioxide and through which the air (24) of the space to be filtered containing carbon dioxide and/or particulate impurities can be passed, that the regenerating equipment of the filter device (10) comprises a heating element (20) for heating the air (24), a first channel (14) for passing the air to the heating element (20), a second channel for passing the heated air to the carbon dioxide filter (13), an operating device (15) for setting the heated air in motion through the carbon dioxide filter (13), and an opening (16, 19) for passing the heated air and together with it the carbon dioxide and/or particulate impurities released from the carbon dioxide filter (13) out from the filter device (10). 7. A filter device (10) according to claim 6, wherein the filter device (10) comprises an opening (16, 19) for passing the heated air and together with it the carbon dioxide and/or particles released from the carbon dioxide filter (13) into outdoor air. 8. A filter device (10) according to claim 6, wherein the filter device (10) comprises a valve (18) through which the carbon dioxide filter (13) can be connected either to the aforesaid second opening (16) for passing the filtered air back into the air space of the space to be filtered or to the aforesaid third opening (19) for passing the heated air and together with it the carbon monoxide and/or particles released from the carbon dioxide filter (13), out from the filter device (10). 9. A filter device (10) according to claim 6, wherein opening (16) of the filter device for delivering the heated air and the carbon monoxide and/or particles released from the carbon dioxide filter (13) into outer air is the same as the opening for passing the filtered air back into the air space of the space to be filtered. 10. A filter device (10) according to claim 6, wherein the device is configured such that during the regeneration step, the air (24) of the space to be filtered can be passed to the filter (13) via the first opening (14) and the first channel (14) and the heating element (20). 11. A filter device (10) according to claim 6, characterized in that the carbon dioxide filter (13) of the filter device (10) is mainly composed of a powdery material, which is a substance capable of trapping carbon dioxide, and that, besides the carbon dioxide filter (13), the filter device (10) comprises an auxiliary filter (17) for pre-filtering the air to be passed to the carbon dioxide filter. 12. A device for removing carbon dioxide from the air of an air raid shelter (101), said device comprising a first filter (102) containing regenerable carbon dioxide-adsorbing adsorbent (104), a second filter (103) containing regenerable carbon dioxide-adsorbing adsorbent (104), air flow means i) for passing the air flow to be cleaned of carbon dioxide from the air raid shelter (101) to the first filter (102), through the first filter (102) so that carbon dioxide is adsorbed into the regenerable carbon dioxide-adsorbing adsorbent (104) of the first filter (102) and for passing the air at least partially cleaned of carbon dioxide out from the first filter (102) and further into the air raid shelter (101). ii) for preventing the air flow to be cleaned of carbon dioxide from getting from the air raid shelter (101) into the first filter (102) and for preventing the air at least partially cleaned of carbon dioxide from getting out from the first filter (102) and further into the air raid shelter (101), iii) for passing the air flow to be cleaned of carbon dioxide from the air raid shelter (101) into the second filter (103), through the second filter (103) so that carbon dioxide is adsorbed into the regenerable carbon dioxide-adsorbing adsorbent (104) of the second filter (103), and for passing the air at least partially cleaned of carbon dioxide out from the second filter (103) and further into the air raid shelter (101), and iv) for preventing the air flow to be cleaned of carbon dioxide from getting into the second filter (103) and for preventing the air at least partially cleaned of carbon dioxide from getting out from the second filter (103) and further into the air raid shelter (101), and a regeneration arrangement for desorbing from the adsorbent (104) of the first filter (102) the carbon dioxide adsorbed in the adsorbent (104) of the first filter (102) and for removing it from the first filter (102), and for desorbing from the adsorbent (104) of the second filter (103) the carbon dioxide adsorbed in the adsorbent (104) of the second filter (103) and for removing it from the second filter (103), characterized in that the regeneration arrangement comprises a heating arrangement comprising a heating device (120) for heating a fluid, and a closed fluid circulation system (121) i) for conducting the fluid heated by the heating device (120) in the closed fluid circulation system (121) through the first filter so that the adsorbent (104) of the first filter (102) is heated and carbon dioxide is desorbed from the adsorbent (104) of the first filter (102), and ii) for conducting the fluid heated by the heating device (120) in the closed fluid circulation system (121) through the second filter (103) so that the adsorbent (104) of the second filter (103) is heated and carbon dioxide is desorbed from the adsorbent (104) of the second filter (103). 13. A device according to claim 12, characterized in that the adsorbent (104) comprises an amine or amine compound, which preferably but not necessarily is slightly alkaline. 14. A device according to claim 12, characterized in that the heating device (120) have been fitted to heat the adsorbent (104) of the first filter (102) and the second filter (103) to a temperature of 50-200° C., more preferably to a temperature of 70-110° C., most preferably to a temperature of 80-85° C. 15. A device according to claim 12, characterized in that the regeneration arrangement comprises a cooling device (130) for reducing the temperature of the adsorbent (104) of the first filter (102) and the second filter (103). 16. A device according to claim 15, characterized in that the cooling device (130) has been fitted to cool the fluid, that the cooling device (130) has been fitted to feed the fluid cooled by the cooling device (130) into the closed fluid circulation system (121) to conduct the fluid cooled by the cooling device (130) in the closed fluid circulation system (121) through the first filter (102), and that the cooling device (130) has been fitted to feed the fluid cooled by the cooling device (130) into the closed fluid circulation system (121) to conduct the fluid cooled by the cooling device (130) in the closed fluid circulation system (121) through the second filter (103). 17. A device according to claim 15, characterized in that the cooling device (130) has been fitted to cool the adsorbent (104) of the first filter (102) and the second filter (103) to a temperature of 10-50° C., more preferably to a temperature of 20-40° C., most preferably to a temperature of 20-30° C. 18. A device according to claim 12, characterized in that the fluid is water with an alcohol, such as e.g. glycol, mixed in it. 19. A device according to claim 12, characterized in that the regeneration arrangement comprises purification gas supply means for supplying a purification gas into the first filter (102) to mix the carbon dioxide desorbed from the adsorbent (104) into the purification gas, purification gas supply means for supplying a purification gas into the second filter (103) to mix the carbon dioxide desorbed from the adsorbent (104) into the purification gas, purification gas outlet means for conducting the carbon dioxide-containing purification gas out from the first filter (102), and purification gas outlet means for conducting the carbon dioxide-containing purification gas out from the second filter (103). 20. A device according to claim 19, characterized in that the purification gas supply means comprise a pressure vessel (123), from which the purification gas can be fed into the first filter (102) and the second filter (103). 21. A device according to claim 19, characterized in that the purification gas is nitrogen. 22. A method according to claim 1, wherein in the step of regenerating the carbon dioxide filter (13), air that is passed through the filter is heated to a temperature of 70-80° C. 23. A method according to claim 3, wherein in the step of regenerating the carbon dioxide filter (13), air that is passed through the filter is heated to a temperature of 70-80° C. 24. A method according to claim 5, wherein in the step of regenerating the carbon dioxide filter (13), the outdoor air that is passed through the filter is heated to a temperature of 70-80° C.
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