Control of atmosphere in for example fruit stores
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0915030
(1986-10-03)
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우선권정보 |
GB-0024740 (1985-10-08) |
발명자
/ 주소 |
- Jameson John (Maidstone GB2)
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출원인 / 주소 |
- National Research Development Corporation (London GB2 07)
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인용정보 |
피인용 횟수 :
9 인용 특허 :
0 |
초록
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In a refrigerated fruit store 1, the atmosphere is controlled to low levels of oxygen and carbon dioxide using an activated carbon bed 2, by continuously repeating the following cycle of operations: (1) expose the carbon in the bed 2 to the atmosphere in the fruit store 1, until saturated with CO2 (
In a refrigerated fruit store 1, the atmosphere is controlled to low levels of oxygen and carbon dioxide using an activated carbon bed 2, by continuously repeating the following cycle of operations: (1) expose the carbon in the bed 2 to the atmosphere in the fruit store 1, until saturated with CO2 (12 minutes); (2) evacuate the bed 2, down to 7 kPa, to the gas reservoir 5, whereby the O2 and N2 (but not CO2) are released in “fruit store”proportions into the reservoir (2 minutes); (3) expose the bed 2 to air to purge it of the CO2 (18 minutes); (4) evacuate the bed 2 to waste (7 kPa is adequate) to remove O2 and N2, which would otherwise remain in the bed in substantially “air”proportions (i.e. excessive oxygen) (2 minutes); (5) expose the bed 2 to the gas put in the reservoir 5 at operation (2) above, so that the bed 2 now contains O2 and N2 in “fruit store”proportions (2 minutes); (1) expose the adsorptive medium to chamber atmosphere; and so forth indefinitely.
대표청구항
▼
A method for controlling CO2 build-up in an atmosphere in a closed cold storage warehouse for fresh fruit which, by respiring, is taking-up oxygen from the warehouse atmosphere and releasing CO2 to the warehouse atmosphere, comprising: providing a container of adsorptive medium which more strongly a
A method for controlling CO2 build-up in an atmosphere in a closed cold storage warehouse for fresh fruit which, by respiring, is taking-up oxygen from the warehouse atmosphere and releasing CO2 to the warehouse atmosphere, comprising: providing a container of adsorptive medium which more strongly adsorbs CO2 than it does O2 and N2, an expansible/collapsible gas reservoir at atmospheric pressure, and valved gas passages: (i) between said warehouse and said container of adsorptive medium, (ii) between said container of adsorptive medium and said gas reservoir, and (iii) between said gas reservoir and external atmosphere relative to said warehouse; and repeatedly conducting the following sequence of steps while refrigerating said atmosphere of said warehouse down to about 3.5°C. and about 90 percent relative humidity: (a) opening gas passage (i) while gas passages (ii) and (iii) remain closed, at a time when said atmosphere of said warehouse contains an excess of CO2 and a deficit of O2 in relation to external atmospheric air, until said adsorptive medium is substantially saturated with CO2; (b) closing gas passage (i) and opening gas passage (ii) while gas passage (iii) remains closed, and evacuating the atmosphere in said container into said gas reservoir, by vacuum pumping through gas passage (ii), until the pressure in said container is about 7 kPa but the pressure in said gas reservoir remains at about 1 atmosphere, so that said gas reservoir expands and becomes filled with O2 and N2 substantially in the same proportions in which those gases then exist in said atmosphere of said warehouse, but CO2 in a lower proportion than that in which CO2 then exists in said atmosphere of said warehouse; (c) closing gas passage (ii) and opening gas passage (iii) while gas passage (i) remains closed and permitting CO2 which has become adsorbed in said adsorptive medium to purge therefrom to atmosphere externally of said warehouse atmosphere until the amount of CO2 present in said container at the beginning of this step has substantially diminished; (d) while gas passages (i) and (ii) remain closed, evacuating the atmosphere of said container, to waste, by vacuum pumping through gas passage (iii), until the pressure in said container is about 7 kPa, thereby removing O2 and N2 from said container in external atmosphere proportions; and (e) closing gas passage (iii) and opening gas passage (ii) while gas passage (i) remains closed, and thereby permitting said container to become refilled from said gas reservoir as said gas reservoir collapses, with an atmosphere which contains O2 and N2 in proportions approximating those then present in said warehouse atmosphere, but CO2 in a lower proportion than that in which CO2 then exists in said warehouse atmosphere.
이 특허를 인용한 특허 (9)
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Savur, Sanjay; Linde, Gerrit; Jordan, Rodney A.; Jones, Lee J.; Barker, Leigh R., Apparatus for controlled venting of a chamber.
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Chadwick, William C.; Adams, Eric W.; Thibaud-Erkey, Catherine, Control of atmosphere within a closed environment.
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Garrett Michael E.,GBX, Controlling atmospheres in containers.
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Challis Anthony Arthur Leonard,GB2 ; Bevis Michael John,GB2, Medical dressing having a thermally expandable passage.
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Savur, Sanjay; Linde, Gerrit; Jordan, Rodney A.; Jones, Lee J.; Barker, Leigh R., Method for controlled venting of a chamber.
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Jain Ravi (Piscataway NJ), PSA employing high purity purging.
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Garrett Michael E. (Woking GB2), Refrigerated containers.
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Robert Banks GB, Selective adsorption of components of a gas mixture.
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Schaefer, James C., System and method of operation for controlled atmosphere storage.
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