JPH055585A - Freshness storage box - Google Patents
Freshness storage boxInfo
- Publication number
- JPH055585A JPH055585A JP15836191A JP15836191A JPH055585A JP H055585 A JPH055585 A JP H055585A JP 15836191 A JP15836191 A JP 15836191A JP 15836191 A JP15836191 A JP 15836191A JP H055585 A JPH055585 A JP H055585A
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- nitrogen
- air
- storage
- permeable membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は酸素選択透過膜を用いた
新鮮貯蔵庫に関するもので、より詳しくは、酸素選択透
過膜に対して空気の供給側と排出側を定期的に切換え、
選択透過膜の性能を長く維持することができる新鮮貯蔵
庫を得ることを目的とする。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fresh storage using an oxygen selective permeable membrane, and more specifically, it periodically switches the air supply side and the air discharge side with respect to the oxygen selective permeable membrane.
It is an object of the present invention to obtain a fresh storage capable of maintaining the performance of a permselective membrane for a long time.
【０００２】[0002]
【従来の技術】従来の家庭用冷蔵庫にあっては、食品の
貯蔵に最適な条件を整えるため、冷蔵庫内の雰囲気を積
極的に改善するという試みはなされていなかった。貯蔵
に最適な条件を整備する試みで専らなされているのは、
食品の貯蔵区画に応じて細かく貯蔵温度をコントロール
することである。そのため、従来の冷蔵庫では空気中の
酸素による食品の酸化を遅らせたりすることはできなか
った。酸化が進行した食品は変色したり、香味が劣化し
たりする。また、食品によっては、酸化のためエチレン
ガスを発生し、このガスにより品質劣化が促進され、香
味が著しく低下するようになる。このような酸化による
品質低下に加え、少しずつ食品の表面からは水分の蒸散
が起こり、乾燥が進行していく。これらの現象の相乗作
用によって、短期間に食品の劣化が起こる。2. Description of the Related Art In conventional home refrigerators, no attempt has been made to positively improve the atmosphere in the refrigerator in order to prepare the optimum conditions for storing food. What is being done exclusively in an attempt to maintain optimal conditions for storage is
It is to control the storage temperature finely according to the storage compartment of the food. Therefore, the conventional refrigerator cannot delay the oxidation of food due to oxygen in the air. Foods that have undergone oxidation are discolored or the flavor is deteriorated. In addition, depending on the food, ethylene gas is generated due to oxidation, and this gas promotes deterioration of quality, resulting in a marked decrease in flavor. In addition to such deterioration of quality due to oxidation, moisture evaporates from the surface of the food little by little, and drying progresses. The synergistic effect of these phenomena results in food deterioration in a short period of time.
【０００３】一方、業務用冷蔵庫では、ＣＡ貯蔵と呼ば
れる炭酸ガスを用いた冷蔵庫内の雰囲気を改善する試み
が検討されている。しかし、扉の開閉が多い家庭用冷蔵
庫には不向きであった。On the other hand, in commercial refrigerators, attempts are being made to improve the atmosphere in the refrigerator using carbon dioxide gas called CA storage. However, it was not suitable for household refrigerators, which often had doors to open and close.
【０００４】また、特開平１−２３９３６２号公報で
は、扉を閉めることにより保存室を密閉できるようにし
た保存庫において、保存庫の壁に連通穴を設け、この連
通穴に酸素を選択的に透過することができる分離膜を装
着し、この分離膜を境にして保存室内の方が外部よりも
圧力が高くなるようにしたものが提案されている。Further, in JP-A-1-239362, in a storage cabinet in which the storage chamber can be closed by closing a door, a communication hole is provided in a wall of the storage cabinet, and oxygen is selectively introduced into the communication hole. It has been proposed that a separation membrane that is permeable is attached, and that the pressure inside the storage chamber becomes higher than that outside the separation membrane as a boundary.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記構成の保
存庫においては、長期間使用する間に、酸素選択透過膜
の空気供給側の表面近傍に空気中の窒素が残留し、上記
膜表面近傍の窒素濃度が徐々に高くなる。それにより、
空気中の酸素が上記選択透過膜を透過し難くなる。その
ため、酸素に対する除去効率が次第に低下するので、定
期的に上記選択透過膜を交換しなければならないという
問題があった。However, in the storage having the above-mentioned constitution, during long-term use, nitrogen in the air remains near the surface of the oxygen selective permeable membrane on the air supply side, and the vicinity of the membrane surface Nitrogen concentration gradually increases. Thereby,
Oxygen in the air becomes difficult to permeate through the permselective membrane. Therefore, the efficiency of removing oxygen gradually decreases, and there is a problem in that the permselective membrane must be periodically replaced.
【０００６】本発明は、このような問題点を解決するた
めになされたものであって、酸素選択透過膜に対する空
気の流れを定期的に切換え、上記選択透過膜の表面近傍
に残留する窒素を掃気して、上記透過膜の酸素の透過性
能を維持できる新鮮貯蔵庫を提供することを目的とす
る。The present invention has been made in order to solve such a problem, and periodically switches the flow of air to the oxygen selective permeable membrane to remove the nitrogen remaining in the vicinity of the surface of the selective permeable membrane. It is an object of the present invention to provide a fresh reservoir that can be scavenged to maintain the oxygen permeability of the permeable membrane.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
にこの発明は、扉によって密閉可能な箱体内に、食品を
貯蔵するための貯蔵ケースを設けると共に、上記箱体に
上記貯蔵ケースと外部とを連通する連通孔とを設け、更
に、酸素を選択的に透過する酸素選択透過膜を備えて普
通の地上空気より窒素構成比率の高い空気を発生させる
窒素富化空気発生装置により発生させた窒素富化空気
を、圧送手段により上記連通孔から貯蔵ケースに供給し
て食品の鮮度を維持させるようにした新鮮貯蔵庫におい
て、上記貯蔵ケース内の圧力が外部より高くなるように
構成すると共に、上記窒素富化空気発生装置は、上記酸
素選択透過膜に対して空気の供給側と排出側とを所定時
間毎に切換え、上記酸素選択透過膜の表面近傍に残留す
る窒素を掃気して、上記酸素選択透過膜の性能を維持さ
せるようにしたことを特徴とする。In order to achieve the above object, the present invention provides a storage case for storing foods in a box which can be closed by a door, and the storage case and the outside in the box. A nitrogen-enriched air generator for generating air having a higher nitrogen composition ratio than ordinary ground air, further comprising a communication hole for communicating with Nitrogen-enriched air is supplied to the storage case from the communication hole by a pressure-feeding means to maintain the freshness of the food, and is configured such that the pressure in the storage case is higher than the outside, and The nitrogen-enriched air generator switches the air supply side and the air discharge side with respect to the oxygen selective permeable membrane at predetermined time intervals, scavenges nitrogen remaining near the surface of the oxygen selective permeable membrane, Characterized in that so as to maintain the performance of the serial oxygen selective permeable membrane.
【０００８】[0008]
【作用】上記構成において、酸素選択透過膜を通過する
空気は、所定時間毎に供給側と排出側が切換えられるよ
うになされているので、上記選択透過膜の表面近傍に残
留する窒素は、上記通過空気によって定期的に掃気され
るので、上記選択透過膜は定期的に交換しなくてもその
性能を維持させることができる。In the above structure, since the air passing through the oxygen selective permeable membrane is switched between the supply side and the discharge side at predetermined time intervals, the nitrogen remaining in the vicinity of the surface of the selective permeable membrane is passed through the above-mentioned passage. Since the air is regularly scavenged, the performance of the permselective membrane can be maintained without periodic replacement.
【０００９】[0009]
【実施例】本発明の新鮮貯蔵庫の一実施例を図面に基づ
いて詳述する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the fresh storage of the present invention will be described in detail with reference to the drawings.
【００１０】図１は本発明の新鮮貯蔵庫の一実施例であ
る家庭用冷蔵庫の下部に設けられた貯蔵ケースと窒素富
化空気発生装置の縦断面図、図２は図１の平面断面図で
ある。FIG. 1 is a vertical sectional view of a storage case and a nitrogen-enriched air generator installed in a lower portion of a household refrigerator which is an embodiment of the fresh storage of the present invention, and FIG. 2 is a plan sectional view of FIG. is there.
【００１１】１は貯蔵ケース、２は上部の冷蔵室等と貯
蔵室３とを仕切る仕切壁である。４，５，６および７は
上記貯蔵ケース１の側壁であり、この側壁４，５，６お
よび７には、ほゞ等間隔に複数の孔８が穿孔されてい
る。そして、上記貯蔵室３の前面には、扉１０が開閉自
在に取着されている。また、上記貯蔵室３の左側壁の前
方上部には、この貯蔵室３内の空気の排出孔９が穿かれ
ると共に、上記貯蔵室３の右側壁の下部後方には、窒素
富化空気の供給孔２３が穿かれている。Reference numeral 1 is a storage case, and 2 is a partition wall for partitioning an upper refrigerating room and the like from the storage room 3. 4, 5, 6 and 7 are side walls of the storage case 1, and the side walls 4, 5, 6 and 7 are provided with a plurality of holes 8 at substantially equal intervals. A door 10 is attached to the front surface of the storage chamber 3 so as to be openable and closable. A discharge hole 9 for air in the storage chamber 3 is formed in the upper front portion of the left side wall of the storage chamber 3, and a nitrogen-enriched air is supplied in the lower rear portion of the right side wall of the storage chamber 3. A hole 23 is drilled.
【００１２】そして、上記排出孔９から排出された空気
は、パイプ１１により窒素富化空気発生装置Ａの吸入側
フイルタ部１２の空気取入側に送られる。この吸入側フ
イルタ部１２の空気取入側には、外気導入フイルタ部１
３から取り入れた外気導入パイプ２４も接続されてい
る。The air discharged from the discharge hole 9 is sent to the air intake side of the suction side filter section 12 of the nitrogen-enriched air generator A by the pipe 11. The outside air introduction filter unit 1 is provided on the air intake side of the suction side filter unit 12.
The outside air introduction pipe 24 taken in from No. 3 is also connected.
【００１３】１４は圧送ポンプ、１５は圧送ポンプ１４
の吐出口であり、三方切換弁１６の入口に接続されてい
る。上記三方切換弁１６の一方の出口１８は、酸素選択
透過膜１９で２室に分割された酸素分離部２１の上記供
給孔２３に接続する側の室２１ａに接続され、上記三方
切換弁１６のもう一方の出口１７は、上記酸素分離部２
１の外部に通じる側の室２１ｂに接続されている。２０
は外部排気側フイルタ部、２２は窒素富化空気供給側フ
イルタ部である。Reference numeral 14 is a pressure feed pump, and 15 is a pressure feed pump 14.
And is connected to the inlet of the three-way switching valve 16. One of the outlets 18 of the three-way switching valve 16 is connected to a chamber 21a on the side of the oxygen separation section 21 which is divided into two chambers by an oxygen selective permeable membrane 19 and which is connected to the supply hole 23. The other outlet 17 is used for the oxygen separation unit 2
1 is connected to the chamber 21b on the side communicating with the outside. 20
Is an external exhaust side filter section, and 22 is a nitrogen-enriched air supply side filter section.
【００１４】図３は本発明の新鮮貯蔵庫の貯蔵室に窒素
富化空気を供給するときの状態を示す図、図４は本発明
の新鮮貯蔵庫の窒素富化空気発生装置の酸素選択透過膜
の掃気時の状態を示す図、図５は本発明の新鮮貯蔵庫を
運転時の貯蔵室内の酸素濃度の変化を示す図である。FIG. 3 is a diagram showing a state in which nitrogen-enriched air is supplied to the storage chamber of the fresh storage of the present invention, and FIG. 4 is an oxygen selective permeable membrane of the nitrogen-enriched air generator of the fresh storage of the present invention. FIG. 5 is a diagram showing a state during scavenging, and FIG. 5 is a diagram showing a change in oxygen concentration in the storage chamber during operation of the fresh storage of the present invention.
【００１５】図３において、上記パイプ１１を通った貯
蔵室３からの空気は、上記圧送ポンプ１４によって吸引
され、上記吸入側フイルタ部１２で空気中のゴミが濾過
され、圧送ポンプ１４を通り、上記三方切換弁１６の弁
１６ａが出口１７側を閉塞、出口１８側を開放するよう
に切換えられているので、上記空気は出口１８から上記
酸素分離部２１の室２１ａに入る。また、貯蔵室３から
だけの空気では、処理空気量が不足するため外気導入フ
イルタ部１３からの外気も一部導入される。そして、空
気中の酸素の一部は、例えばポリ−４−ビニルピリジン
の高分子膜よりなる酸素選択透過膜１９を選択的に透過
していくので、上記室２１ａの酸素濃度が低下し、その
結果、窒素の濃度が上昇する。そして、この窒素濃度の
高くなった空気は、上記窒素富化空気供給側フイルタ部
２２を通り、上記供給孔２３から貯蔵室３に供給され
る。そして、上記選択透過膜９から上記室２１ｂに透過
してきた酸素は、上記外部排気側フイルタ部２０を通つ
て外部に排出される。貯蔵室３に供給された空気は、貯
蔵ケース１の右側壁に設けられた孔８や上面から貯蔵ケ
ース１内に入り、左側壁の孔８から排出孔９に排出され
ていく。In FIG. 3, the air from the storage chamber 3 which has passed through the pipe 11 is sucked by the pressure pump 14, the dust in the air is filtered by the suction side filter unit 12, and passes through the pressure pump 14. Since the valve 16a of the three-way switching valve 16 is switched so as to close the outlet 17 side and open the outlet 18 side, the air enters the chamber 21a of the oxygen separation section 21 from the outlet 18. Further, since the amount of treated air is insufficient with the air only from the storage chamber 3, a part of the outside air from the outside air introduction filter unit 13 is also introduced. Then, part of the oxygen in the air selectively permeates through the oxygen-selective permeable film 19 made of, for example, a polymer film of poly-4-vinylpyridine, so that the oxygen concentration in the chamber 21a decreases and As a result, the concentration of nitrogen increases. Then, the air having a high nitrogen concentration passes through the nitrogen-enriched air supply side filter section 22 and is supplied to the storage chamber 3 from the supply hole 23. Then, the oxygen that has permeated from the selective permeable membrane 9 into the chamber 21b is exhausted to the outside through the external exhaust side filter section 20. The air supplied to the storage chamber 3 enters the storage case 1 through the holes 8 provided on the right side wall of the storage case 1 and the upper surface, and is discharged to the discharge holes 9 through the holes 8 on the left side wall.
【００１６】しかし、長時間この状態で運転を継続して
いると、上記選択透過膜１９の室２１ａ側の表面近傍に
窒素が残留し、酸素の透過を妨げるようになる。そこ
で、上記三方切換弁１６を所定時間毎に切換える。However, if the operation is continued for a long time in this state, nitrogen remains in the vicinity of the surface of the selective permeation membrane 19 on the chamber 21a side, which impedes the permeation of oxygen. Therefore, the three-way switching valve 16 is switched every predetermined time.
【００１７】図４において、三方切換弁１６の弁１６ａ
が電磁コイル（図示せず）や制御手段（図示せず）によ
り出口１８を閉塞、出口１７を開放するように切換えら
れているので、上記圧送ポンプ１４から圧送されてきた
空気は出口１７から酸素分離部２１の室２１ｂに入る。
そして、上記外部排気側フイルタ部２０のフイルタ２０
ａが通風抵抗体として作用するので、上記空気は全量が
外部に排出されることなく、酸素の一部は上記選択透過
膜１９を透過して上記室２１ａにはいる。この酸素によ
り、上記選択透過膜１９の室２１ａ側表面近傍に残留し
ている窒素は掃気される。このとき、一時的に酸素富化
空気が貯蔵室３に供給されるが、その時間は短かいた
め、供給量が少なく影響も小さい。In FIG. 4, the valve 16a of the three-way switching valve 16 is shown.
Is switched so that the outlet 18 is closed and the outlet 17 is opened by an electromagnetic coil (not shown) or a control means (not shown), so that the air pressure-fed from the pressure pump 14 is oxygen-fed from the outlet 17. The chamber 21b of the separating section 21 is entered.
Then, the filter 20 of the external exhaust side filter unit 20 is
Since a acts as a ventilation resistor, the entire amount of the air is not discharged to the outside, and a part of oxygen permeates the selective permeable membrane 19 and enters the chamber 21a. This oxygen scavenges the nitrogen remaining in the vicinity of the surface of the selectively permeable membrane 19 on the chamber 21a side. At this time, the oxygen-enriched air is temporarily supplied to the storage chamber 3, but since the time is short, the supply amount is small and the influence is small.
【００１８】なお、上記フイルタ２０ａの他に、上記吸
入側フイルタ部１２のフイルタ１２ａと外気導入側フイ
ルタ部１３のフイルタ１３ａとは、貯蔵室３即ち、貯蔵
ケース１内からの空気の排出を妨げ、貯蔵ケースの圧力
を外部より高く維持するための通風抵抗体を兼ねてい
る。さらに、上記フイルタ１２ａ，１３ａ，２０ａ及び
上記窒素富化空気供給側フイルタ部２２のフイルタ２２
ａは、消音フイルタも兼ねている。In addition to the filter 20a, the filter 12a of the suction side filter 12 and the filter 13a of the outside air introduction side filter 13 prevent the discharge of air from the storage chamber 3, that is, the storage case 1. , It also serves as a ventilation resistor for keeping the pressure in the storage case higher than the outside. Further, the filters 12a, 13a, 20a and the filter 22 of the nitrogen-enriched air supply side filter unit 22 are provided.
a also serves as a muffling filter.
【００１９】図５において、運転開始時の貯蔵室内の酸
素濃度は、大気と同じ約２１％である。しかし、上記図
３に示すような通常の運転状態を継続すると、貯蔵ケー
ス内の酸素濃度はどんどん低下して行き、約１０％にな
る。そこで、三方切換弁１６を切換え、図４に示すよう
な酸素選択透過膜１９の再生運転状態に移ると、上記室
２１ｂから透過してきた酸素が供給されるため、酸素濃
度が少し上昇する。しかし、この時間は短いため酸素濃
度の急な上昇はすぐに収まる。その後、窒素富化空気発
生装置の運転をしばらく停止するので、貯蔵室３内の酸
素濃度は徐々に上昇してくる。そこで、予め設定した酸
素濃度になれば、再び通常の運転を行う。In FIG. 5, the oxygen concentration in the storage chamber at the start of operation is about 21%, which is the same as that in the atmosphere. However, if the normal operation state as shown in FIG. 3 is continued, the oxygen concentration in the storage case is gradually reduced to about 10%. Therefore, when the three-way switching valve 16 is switched to shift to the regeneration operation state of the oxygen selective permeable membrane 19 as shown in FIG. 4, the oxygen permeated from the chamber 21b is supplied, so that the oxygen concentration slightly rises. However, since this time is short, the rapid increase in oxygen concentration will subside immediately. After that, the operation of the nitrogen-enriched air generator is stopped for a while, so that the oxygen concentration in the storage chamber 3 gradually rises. Therefore, if the preset oxygen concentration is reached, normal operation is performed again.
【００２０】[0020]
【発明の効果】本発明の新鮮貯蔵庫は以上のように構成
されたものであるので、酸素選択透過膜に対する空気流
の方向を定期的に切換えるだけで、酸素選択透過膜の表
面近傍に残留する窒素が掃気されるので、酸素選択透過
膜を定期的に交換しなくてもその酸素選択透過機能を長
時間維持できる。EFFECTS OF THE INVENTION Since the fresh storage of the present invention is constructed as described above, it can remain near the surface of the oxygen selective permeable membrane simply by periodically switching the direction of the air flow to the oxygen selective permeable membrane. Since nitrogen is scavenged, the oxygen selective permeable function can be maintained for a long period of time without periodically changing the oxygen selective permeable membrane.
【図１】本発明の新鮮貯蔵庫の一実施例である家庭用冷
蔵庫の下部に設けられた貯蔵ケースと窒素富化空気発生
装置の縦断面図である。FIG. 1 is a vertical cross-sectional view of a storage case and a nitrogen-enriched air generator installed in a lower portion of a home refrigerator that is an embodiment of a fresh storage of the present invention.
【図２】図１の平面断面図である。FIG. 2 is a plan sectional view of FIG.
【図３】本発明の新鮮貯蔵庫の貯蔵室に窒素富化空気を
供給するときの状態を示す図である。FIG. 3 is a diagram showing a state in which nitrogen-enriched air is supplied to the storage compartment of the fresh stocker of the present invention.
【図４】本発明の新鮮貯蔵庫の窒素富化空気発生装置の
酸素選択透過膜の掃気時の状態を示す図である。FIG. 4 is a diagram showing a state during scavenging of the oxygen selective permeable membrane of the nitrogen-enriched air generator of the fresh store of the present invention.
【図５】本発明の新鮮貯蔵庫を運転時の貯蔵室内の酸素
濃度の変化を示す図である。FIG. 5 is a diagram showing changes in oxygen concentration in the storage chamber when the fresh storage container of the present invention is in operation.
１ 貯蔵ケース ３ 貯蔵室 １９ 酸素選択透過膜 Ａ 窒素富化空気発生装置 1 Storage Case 3 Storage Room 19 Oxygen Selective Permeation Membrane A Nitrogen Enriched Air Generator
Claims (1)
蔵するための貯蔵ケースを設けると共に、上記箱体に上
記貯蔵ケースと外部とを連通する連通孔とを設け、更
に、酸素を選択的に透過する酸素選択透過膜を備えて普
通の地上空気より窒素構成比率の高い空気を発生させる
窒素富化空気発生装置により発生させた窒素富化空気
を、圧送手段により上記連通孔から貯蔵ケースに供給し
て食品の鮮度を維持させるようにした新鮮貯蔵庫におい
て、上記貯蔵ケース内の圧力が外部より高くなるように
構成すると共に、上記窒素富化空気発生装置は、上記酸
素選択透過膜に対して空気の供給側と排出側とを所定時
間毎に切換え、上記酸素選択透過膜の表面近傍に蓄積す
る窒素を掃気して、上記酸素選択透過膜の性能を維持さ
せるようにしたことを特徴とする新鮮貯蔵庫。Claims: 1. A storage case for storing food is provided in a box which can be closed by a door, and a communication hole for communicating the storage case with the outside is provided in the box. In addition, the nitrogen-enriched air generated by a nitrogen-enriched air generator that is equipped with an oxygen-selective permeable membrane that selectively permeates oxygen and generates air having a higher nitrogen composition ratio than ordinary ground air is supplied by a pumping means. In a fresh storage cabinet configured to supply the storage case from the communication hole to maintain the freshness of food, the pressure inside the storage case is configured to be higher than the outside, and the nitrogen-enriched air generator is the above-mentioned. The air supply side and the air discharge side of the oxygen selective permeable membrane are switched at predetermined intervals, and nitrogen accumulated in the vicinity of the surface of the oxygen selective permeable membrane is scavenged to maintain the performance of the oxygen selective permeable membrane. A fresh storage store characterized by doing so.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15836191A JPH055585A (en) | 1991-06-28 | 1991-06-28 | Freshness storage box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15836191A JPH055585A (en) | 1991-06-28 | 1991-06-28 | Freshness storage box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH055585A true JPH055585A (en) | 1993-01-14 |
Family
ID=15670001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15836191A Pending JPH055585A (en) | 1991-06-28 | 1991-06-28 | Freshness storage box |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH055585A (en) |
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