JP6041293B2 - Carbon dioxide fumigation method for sweet potato fruit and carbon dioxide fumigation device for sweet potato fruit - Google Patents

Carbon dioxide fumigation method for sweet potato fruit and carbon dioxide fumigation device for sweet potato fruit Download PDF

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JP6041293B2
JP6041293B2 JP2012117371A JP2012117371A JP6041293B2 JP 6041293 B2 JP6041293 B2 JP 6041293B2 JP 2012117371 A JP2012117371 A JP 2012117371A JP 2012117371 A JP2012117371 A JP 2012117371A JP 6041293 B2 JP6041293 B2 JP 6041293B2
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carbon dioxide
fumigation
sweet potato
potato fruit
fumigation chamber
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JP2013243937A (en
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紀子 馬場
紀子 馬場
奈保子 法村
奈保子 法村
亜祐子 江嶋
亜祐子 江嶋
良隆 服部
良隆 服部
孝 中山
孝 中山
秀樹 羽野
秀樹 羽野
新介 則松
新介 則松
矢野　貴久
貴久 矢野
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Showa Denko Gas Products Co Ltd
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Description

本発明は、甘柿果実に寄生した害虫をくん蒸により駆除する甘柿果実の炭酸ガスくん蒸方法および炭酸ガスくん蒸装置に関する。   TECHNICAL FIELD The present invention relates to a carbon dioxide fumigation method and a carbon dioxide fumigation apparatus for sweet potato fruits, which exterminate pests parasitic on the sweet potato fruits by fumigation.

従来、穀物や果実の炭酸ガスくん蒸による殺虫処理が実施されている。例えば、特公平７−８８２８５号公報には貯蔵玄米害虫の炭酸ガスくん蒸による殺虫方法が開示され、特開２０００−２６２２０９号公報には青果物穀物殺虫装置が開示されている。   Conventionally, insecticide treatment by fumigation of carbon dioxide gas of grains and fruits has been carried out. For example, Japanese Patent Publication No. 7-88285 discloses a method for killing stored brown rice pests by carbon dioxide fumigation, and Japanese Patent Application Laid-Open No. 2000-262209 discloses a fruit and grain crop insecticide.

しかし甘柿果実については、炭酸ガスの作用により果実の軟化が急速に進行することによる商品価値の低下がおこるため、炭酸ガスくん蒸を行うことができなかった。 However, for sweet potato fruits, carbon dioxide fumigation could not be carried out because the commercial value declined due to the rapid softening of the fruits due to the action of carbon dioxide.

また、一般的に低温では害虫の活性が落ち、炭酸ガスによる殺虫の効果が低下すると考えられ、低温での炭酸ガスくん蒸は実施されなかった。 In general, pest activity is reduced at low temperatures, and the effect of insecticidal killing by carbon dioxide gas is considered to be reduced. Carbon dioxide fumigation at low temperatures was not performed.

そのため現状では、エアガンを使用した手作業で甘柿果実表面の害虫を吹き飛ばす駆除方法がとられ、多量の柿果実の処理には膨大な時間とハンドリングコストがかかる上に、害虫の残留が多く非効率な作業となっている。 Therefore, under the present circumstances, the extermination method that blows away the pests on the surface of the sweet potato fruit by hand using an air gun is taken. It is an efficient work.

特公平７−８８２８５号公報Japanese Patent Publication No. 7-88285 特開２０００−２６２２０９号公報JP 2000-262209 A

本発明は、以上のような従来の欠点に鑑み、甘柿果実を商品価値の低下を起こさずに安価で確実に害虫駆除できる炭酸ガスくん蒸方法を提供することを目的としている。   An object of the present invention is to provide a carbon dioxide fumigation method that can reliably and reliably exterminate pests without causing a decrease in commercial value of the sweet potato fruit in view of the above-described conventional drawbacks.

本発明の前記ならびにそのほかの目的と新規な特徴は次の説明を添付図面と照らし合わせて読むと、より完全に明らかになるであろう。ただし、図面はもっぱら解説のためのものであって、本発明の技術的範囲を限定するものではない。   The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings. However, the drawings are for explanation only and do not limit the technical scope of the present invention.

上記目的を達成するために、本発明は、甘柿果実の炭酸ガスくん蒸において、温度調整装置によりくん蒸室内の温度を−４℃以上４℃以下に調整する甘柿果実の炭酸ガスくん蒸方法を構成している。   In order to achieve the above-mentioned object, the present invention constitutes a method for fumigating a sweet potato fruit carbon dioxide gas fumigated by adjusting the temperature in the fumigation chamber to -4 ° C. or higher and 4 ° C. or lower with a temperature adjusting device in carbon dioxide fumigation of the sweet potato fruit. doing.

以上の説明から明らかなように、本発明にあっては次に列挙する効果が得られる。
（１）請求項１に係る発明によれば、甘柿果実の炭酸ガスくん蒸において、温度調整装置によりくん蒸室内の温度を−４℃以上４℃以下に調整することで、甘柿果実の軟化を抑制することができ、商品価値の低下を防ぐことができる。また、後述の実験結果のとおり、低温であっても甘柿果実に寄生する害虫を駆除できる。
（２）請求項２も、（１）と同様な効果が得られるとともに、炭酸ガス濃度を３０％〜６０％に調整及び維持することで、果実の軟化による商品価値の低下を防止することができ、１回の処理あたりのくん蒸処理時間が２４時間〜４８時間で迅速な処理ができる。
（３）請求項３も、（２）と同様な効果が得られるとともに、炭酸ガスの果実への吸収や空気の流出によりくん蒸室内の炭酸ガス濃度が低下した場合でも、適切な炭酸ガス濃度を自動で維持することができる。
（４）請求項４も、（２）と同様な効果が得られるとともに、カイガラムシ類の駆除において効果を得ることができる。
（５）請求項５に係る発明により、甘柿果実の炭酸ガスくん蒸において、くん蒸室内の温度を−４℃以上４℃以下に調整する温度調整装置を備えることで甘柿果実の軟化を抑制して商品価値の低下を防ぎ、かつ甘柿果実に寄生する害虫を駆除できる甘柿果実の炭酸ガスくん蒸装置を提供することができる。 As is clear from the above description, the present invention has the following effects.
(1) According to the invention according to claim 1, in the carbon dioxide fumigation of sweet potato fruit, the temperature of the fumigation chamber is adjusted to −4 ° C. or higher and 4 ° C. or lower by a temperature adjusting device, thereby softening the sweet potato fruit. It can be suppressed and a decline in commercial value can be prevented. In addition, as shown in the experimental results described later, the insect pests parasitic on the sweet potato fruit can be controlled even at low temperatures.
(2) In claim 2, the same effect as in (1) can be obtained, and by adjusting and maintaining the carbon dioxide concentration at 30% to 60%, it is possible to prevent a decrease in commercial value due to fruit softening. In addition, the fumigation process time per process is 24 hours to 48 hours.
(3) Claim 3 can achieve the same effect as (2), and even when the carbon dioxide concentration in the fumigation chamber is reduced due to absorption of carbon dioxide into the fruit or outflow of air, an appropriate carbon dioxide concentration is set. Can be maintained automatically.
(4) Claim 4 can achieve the same effect as (2) and can also be effective in controlling scale insects.
(5) According to the invention according to claim 5, in the carbon dioxide fumigation of sweet potato fruit, softening of the sweet potato fruit is suppressed by providing a temperature adjusting device for adjusting the temperature in the fumigation chamber to -4 ° C or higher and 4 ° C or lower. Therefore, it is possible to provide a carbon dioxide fumigation device for sweet potato fruit that can prevent a decrease in commercial value and can eliminate pests parasitic on the sweet potato fruit.

本発明を実施するための第１の形態の概略説明図。BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing of the 1st form for implementing this invention. 本発明を実施するための第１の形態による実験のくん蒸室内の温度と二酸化炭素濃度の変化を示す図。The figure which shows the change of the temperature in the fumigation chamber of an experiment by the 1st form for implementing this invention, and a carbon dioxide concentration. 本発明を実施するための第１の形態による実験の害虫駆除効果を示す図。The figure which shows the pest control effect of the experiment by the 1st form for implementing this invention. 本発明を実施するための第１の形態の温度条件による死虫率を示す図。The figure which shows the death rate by the temperature condition of the 1st form for implementing this invention. 本発明を実施するための第２の形態の概略説明図。Schematic explanatory drawing of the 2nd form for implementing this invention. 本発明を実施するための第３の形態の概略説明図。Schematic explanatory drawing of the 3rd form for implementing this invention.

以下、図面に示す本発明を実施するための形態により、本発明を詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

図１に示す本発明を実施するための第１の形態において、１は本発明の甘柿果実のくん蒸方法で、この甘柿果実のくん蒸方法１は甘柿果実のくん蒸装置２により、害虫の寄生した甘柿果実をくん蒸室に収納する収納工程と、該くん蒸室内部の温度を−４℃以上４℃以下に調整する温度調整工程と、前記くん蒸室内部に炭酸ガスを供給する炭酸ガス供給工程と、くん蒸室内部の炭酸ガス濃度を調整する炭酸ガス濃度調整工程と、甘柿果実のくん蒸を行うくん蒸工程とで構成されている。   In the first embodiment for carrying out the present invention shown in FIG. 1, reference numeral 1 denotes a method for fumigating sweet potato fruit according to the present invention. A storing step for storing the parasitic sweet potato fruit in the fumigation chamber, a temperature adjusting step for adjusting the temperature in the fumigation chamber to -4 ° C. or more and 4 ° C. or less, and a carbon dioxide supply for supplying carbon dioxide to the fumigation chamber inside It comprises a process, a carbon dioxide concentration adjusting step for adjusting the carbon dioxide concentration in the fumigation chamber, and a fumigation step for fumigating the sweet potato fruit.

甘柿果実のくん蒸装置２は害虫の寄生した甘柿果実４を内部に収納するくん蒸室１０と、このくん蒸室１０内部の温度を−４℃から４℃に調整することができる温度調整装置３０と、前記くん蒸室１０内部に希釈炭酸ガスを供給する希釈炭酸ガス供給装置２０と、前記くん蒸室１０内の炭酸ガス濃度を調整する炭酸ガス濃度調整手段１９とより構成されている。   The fumigation device 2 for the sweet potato fruit contains a fumigation chamber 10 for storing the sweet potato fruit 4 infested with pests, and a temperature adjusting device 30 for adjusting the temperature inside the fumigation chamber 10 from -4 ° C to 4 ° C. And a dilute carbon dioxide supply device 20 for supplying dilute carbon dioxide into the fumigation chamber 10 and a carbon dioxide concentration adjusting means 19 for adjusting the carbon dioxide concentration in the fumigation chamber 10.

前記炭酸ガス濃度調整手段１９は、前記くん蒸室１０内のガスの循環を行う循環ブロアー１２と、前記くん蒸室１０内の炭酸ガス濃度を測定する炭酸ガス濃度計１３と、前記くん蒸室１０から空気やガスを排気する排気弁１５を介装した排気路１４で構成されている。 The carbon dioxide concentration adjusting means 19 includes a circulation blower 12 that circulates gas in the fumigation chamber 10, a carbon dioxide concentration meter 13 that measures the carbon dioxide concentration in the fumigation chamber 10, and air from the fumigation chamber 10. And an exhaust passage 14 having an exhaust valve 15 for exhausting gas.

前記希釈炭酸ガス供給装置２０は炭酸ガスが充填された炭酸ガス容器２１と、この炭酸ガス容器からガス混合器２５へ炭酸ガスを供給する炭酸ガス供給路２２と、前記ガス混合器２５に供給された炭酸ガスを希釈するエアーを供給するエアーコンプレッサー２３と、このエアーコンプレッサー２３から前記ガス混合器２５へエアーを供給するエアー供給路２４と、炭酸ガスを所定の濃度にエアーで希釈する前記ガス混合器２５と、前記ガス混合器２５から前記くん蒸室へ希釈炭酸ガスを供給する供給弁２７を介装した希釈炭酸ガス供給路２６で構成されている。この希釈炭酸ガス供給装置２０は、希釈率を調整することにより、炭酸ガスのみやエアーのみの供給を行うこともできる。   The diluted carbon dioxide supply device 20 is supplied to the carbon dioxide container 21 filled with carbon dioxide, the carbon dioxide supply passage 22 for supplying carbon dioxide from the carbon dioxide container to the gas mixer 25, and the gas mixer 25. An air compressor 23 for supplying air for diluting the carbon dioxide gas, an air supply path 24 for supplying air from the air compressor 23 to the gas mixer 25, and the gas mixing for diluting the carbon dioxide gas to a predetermined concentration with air. And a dilute carbon dioxide gas supply path 26 provided with a supply valve 27 for supplying dilute carbon dioxide gas from the gas mixer 25 to the fumigation chamber. The diluted carbon dioxide supply device 20 can also supply only carbon dioxide or air by adjusting the dilution rate.

前記温度調整装置３０は、前記くん蒸室１０内に設置された温度調整装置室内機３１と、前記くん蒸室１０の外部に設置された温度調整装置室外機３２と、温度調整装置室内機３１および温度調整装置室外機３２を接続し、温度調整装置室内機３１に冷媒を供給する冷媒配管３３とより構成されている。   The temperature adjusting device 30 includes a temperature adjusting device indoor unit 31 installed in the fumigation chamber 10, a temperature adjusting device outdoor unit 32 installed outside the fumigation chamber 10, a temperature adjusting device indoor unit 31 and a temperature. It comprises a refrigerant pipe 33 that connects the adjusting device outdoor unit 32 and supplies the refrigerant to the temperature adjusting device indoor unit 31.

甘柿果実４は通気性のあるコンテナ５に収納して前記くん蒸室１０に収納する収納工程を行う。その後前記温度調整装置３０により前記くん蒸室内を−４℃から４℃に調整する温度調整工程を行い、前記希釈炭酸ガス供給装置２０により、炭酸ガス濃度３０〜６０％の希釈炭酸ガスを前記くん蒸室１０に供給する炭酸ガス供給工程を行う。その後、余分なくん蒸室内の空気は前記排気路１４より排出し、前記くん蒸室１０内がムラ無く３０〜６０％の炭酸ガス濃度になったら、前記排気弁１５と前記供給弁２７を閉止する炭酸ガス濃度調整工程を行い、くん蒸工程を開始する。   The sweet potato fruit 4 is stored in a breathable container 5 and stored in the fumigation chamber 10. Thereafter, a temperature adjusting step of adjusting the fumigation chamber from −4 ° C. to 4 ° C. by the temperature adjusting device 30 is performed, and diluted carbon dioxide having a carbon dioxide concentration of 30 to 60% is supplied by the diluted carbon dioxide supply device 20 to the fumigation chamber. The carbon dioxide supply process supplied to 10 is performed. Thereafter, the excess fumigation chamber air is discharged from the exhaust passage 14, and when the fumigation chamber 10 has a uniform carbon dioxide concentration of 30 to 60%, the carbon dioxide that closes the exhaust valve 15 and the supply valve 27 is closed. Perform gas concentration adjustment process and start fumigation process.

炭酸ガス濃度調整工程においては、前記くん蒸室１０内の炭酸ガス濃度にムラが発生する場合は前記循環ブロアー１２を運転して攪拌を行い炭酸ガス濃度を均一にする。また、前記くん蒸室１０内の炭酸ガス濃度が低下する場合は前記希釈炭酸ガス供給装置により必要に応じて希釈炭酸ガス又は炭酸ガスの追加供給を行う。   In the carbon dioxide concentration adjustment step, if the carbon dioxide concentration in the fumigation chamber 10 is uneven, the circulating blower 12 is operated and stirred to make the carbon dioxide concentration uniform. Further, when the carbon dioxide concentration in the fumigation chamber 10 decreases, the diluted carbon dioxide supply device additionally supplies diluted carbon dioxide or carbon dioxide as necessary.

前記くん蒸工程は、２４時間〜４８時間の時間くん蒸した後、前記くん蒸室１０の扉を開放する等して内部の希釈炭酸ガスを排出し、くん蒸工程を終了する。
なお、くん蒸を行う際には図２に示すように温度調整装置３０炭酸ガス濃度調整手段１９によりくん蒸室内の温度および炭酸ガス濃度を一定に保って行う。 In the fumigation process, after fumigation for 24 to 48 hours, the diluted carbon dioxide gas inside is discharged by opening the door of the fumigation chamber 10, and the fumigation process is terminated.
In addition, when fumigating, as shown in FIG. 2, the temperature adjusting device 30 carbon dioxide concentration adjusting means 19 keeps the temperature and carbon dioxide concentration in the fumigation chamber constant.

甘柿果実のくん蒸試験を前記甘柿果実のくん蒸方法１にて実施し、炭酸ガス濃度又はくん蒸室１０内の温度をこれと変更した場合と比較した。   The fumigation test of the sweet potato fruit was carried out by the fumigation method 1 of the sweet potato fruit, and compared with the case where the carbon dioxide concentration or the temperature in the fumigation chamber 10 was changed.

カイガラムシ類が寄生した「富有」、「太秋」などの甘柿果実に前記甘柿果実のくん蒸方法１を実施し、２４〜４８時間処理後、カイガラムシ類の生死の確認を行った。   The sweet potato fruit fumigation method 1 was carried out on sweet potato fruits such as “Furuyu” and “Taiki” that were infested with scale insects. After treatment for 24-48 hours, the survival of the scale insects was confirmed.

図３に示すように、前記甘柿果実のくん蒸方法１にて実施した前記材料及び方法の甘柿果実のくん蒸実験において、炭酸ガス濃度３０〜６０％で供試虫の死虫率が大幅に増加した。また、甘柿果実の軟化の急激な進行はおこらなかった。   As shown in FIG. 3, in the fumigation experiment of the sweet potato fruit of the material and method carried out in the method 1 of fumigation of the sweet potato fruit, the mortality rate of the test insects was greatly increased at a carbon dioxide gas concentration of 30 to 60%. Increased. Moreover, the rapid progress of softening of the sweet potato fruit did not occur.

前記甘柿果実のくん蒸方法１から炭酸ガス濃度を６０％より高い濃度に変更した場合、甘柿果実の軟化の発生が確認された。   When the carbon dioxide concentration was changed to a concentration higher than 60% from the fumigation method 1 of the sweet potato fruit, the occurrence of softening of the sweet potato fruit was confirmed.

前記甘柿果実のくん蒸方法１から炭酸ガス濃度を３０％より低い濃度に変更した場合、図３に示すとおり、供試虫の死虫率の低下が確認された。   When the carbon dioxide concentration was changed to a concentration lower than 30% from the fumigation method 1 of the sweet potato fruit, a decrease in the mortality rate of the test insects was confirmed as shown in FIG.

前記甘柿果実のくん蒸方法１から前記くん蒸室１０内の温度を５℃に変更した場合、甘柿果実の急激な軟化が確認された。   When the temperature in the fumigation chamber 10 was changed to 5 ° C. from the fumigation method 1 of the sweet potato fruit, rapid softening of the sweet potato fruit was confirmed.

前記甘柿果実のくん蒸方法１から前記くん蒸室１０内の温度を−５℃に変更した場合、甘柿果実の凍結が確認された。   When the temperature in the fumigation chamber 10 was changed to −5 ° C. from the fumigation method 1 of the sweet potato fruit, freezing of the sweet potato fruit was confirmed.

図４に示すように、くん蒸室１０内の温度を低温（本実験においては−１℃）にしてくん蒸を行った場合、くん蒸室１０内の温度が２５℃の場合に比べてカイガラムシ類の死虫率が大幅に向上した。   As shown in FIG. 4, when the temperature in the fumigation chamber 10 is reduced to a low temperature (-1 ° C. in this experiment), the scale insects die more than when the temperature in the fumigation chamber 10 is 25 ° C. The insect rate was greatly improved.

以上より、炭酸ガス濃度３０％〜６０％、−４℃〜４℃の環境で甘柿果実のくん蒸を実施することが適切であることを確認した。   From the above, it was confirmed that fumigation of sweet potato fruit was appropriate in an environment of carbon dioxide concentration of 30% to 60% and -4 ° C to 4 ° C.

［発明を実施するための異なる形態］
次に、図５および図６に示す本発明を実施するための異なる形態について説明する。なお、この本発明を実施するための異なる形態の説明に当って、前記本発明を実施するための第１の形態と同一構成部分には同一符号を付して重複説明を省略する。 [Different forms for carrying out the invention]
Next, different modes for carrying out the present invention shown in FIGS. 5 and 6 will be described. In the description of the different modes for carrying out the present invention, the same components as those in the first embodiment for carrying out the present invention are denoted by the same reference numerals, and redundant description is omitted.

図５に示す本発明を実施するための第２の形態において、前記本発明を実施するための第１の形態と主に異なる点は、供給弁２７を自動供給弁２８に、排気弁１５を自動排気弁１６に変更し、自動供給弁２８および自動排気弁１６を炭酸ガス濃度計１３に自動弁制御配線１８で接続し、それぞれ炭酸ガス濃度計１３によって計測された濃度により自動でガスを供給、排出をおこなう事ができ、くん蒸室１０の炭酸ガスの濃度が低下した場合には自動で炭酸ガスの追加供給をおこなう事ができる炭酸ガス濃度調整工程および炭酸ガス濃度調整手段１９Ａにした点で、このような甘柿果実のくん蒸方法１Ａおよび甘柿果実のくん蒸装置２Ａにしても、前記本発明を実施するための第１の形態と同様の効果が得られる。   The second embodiment for carrying out the present invention shown in FIG. 5 differs from the first embodiment for carrying out the present invention mainly in that the supply valve 27 is an automatic supply valve 28 and the exhaust valve 15 is Changed to the automatic exhaust valve 16, the automatic supply valve 28 and the automatic exhaust valve 16 are connected to the carbon dioxide concentration meter 13 by the automatic valve control wiring 18, and the gas is automatically supplied according to the concentration measured by the carbon dioxide concentration meter 13. The carbon dioxide concentration adjusting step and the carbon dioxide concentration adjusting means 19A can automatically discharge carbon dioxide when the concentration of carbon dioxide in the fumigation chamber 10 decreases. Even with such a sweet potato fumigation method 1A and a sweet potato fumigation device 2A, the same effects as in the first embodiment for carrying out the present invention can be obtained.

図６に示す本発明を実施するための第３の形態において、前記本発明を実施するための第１の形態と主に異なる点は、希釈炭酸ガス供給装置２０を炭酸ガス容器４１と、供給弁４３を介装した炭酸ガス供給路４２で構成される炭酸ガス供給装置４０に変更し、これを用いた炭酸ガス供給工程にした点で、このような甘柿果実のくん蒸方法１Ｂおよび甘柿果実のくん蒸装置２Ｂにしても、前記本発明を実施するための第１の形態と同様の効果が得られるとともに、希釈炭酸ガス供給装置２０に比べコストダウンがはかれる。   The third embodiment for carrying out the present invention shown in FIG. 6 is mainly different from the first embodiment for carrying out the present invention in that a diluted carbon dioxide supply device 20 is supplied with a carbon dioxide container 41 and a supply. It is changed to the carbon dioxide supply device 40 constituted by the carbon dioxide supply passage 42 provided with the valve 43, and the carbon dioxide supply step using this is used. Even with the fruit fumigation device 2B, the same effects as those of the first embodiment for carrying out the present invention can be obtained, and the cost can be reduced as compared with the diluted carbon dioxide supply device 20.

前記第３の形態において炭酸ガスの供給方法は、予めくん蒸室１０が３０％〜６０％となる炭酸ガス必要量をその内容積を基に計算し、その必要量の炭酸ガスを炭酸ガス供給装置４０により供給する。その際炭酸ガスは空気より重いため、前記くん蒸室１０内の低部に滞留し、前記くん蒸室１０内の空気は排気路１４より排出される。供給が終了したら供給弁４３と排出弁１４を閉止し、循環ブロワー１２にて攪拌して前記くん蒸室１０内の炭酸ガス濃度を均一にする。炭酸ガスの供給量は、炭酸ガス容器２１の重量や本数等で確認することができる。   In the third embodiment, the carbon dioxide supply method calculates in advance the required amount of carbon dioxide in which the fumigation chamber 10 is 30% to 60% based on the internal volume, and supplies the required amount of carbon dioxide to the carbon dioxide supply device. 40. At that time, since carbon dioxide gas is heavier than air, it stays in the lower part of the fumigation chamber 10, and the air in the fumigation chamber 10 is discharged from the exhaust passage 14. When the supply is completed, the supply valve 43 and the discharge valve 14 are closed, and the circulation blower 12 is stirred to make the carbon dioxide gas concentration in the fumigation chamber 10 uniform. The amount of carbon dioxide supplied can be confirmed by the weight or number of carbon dioxide containers 21.

また、炭酸ガスの供給方法について、炭酸ガスが低部に滞留する性質を利用する方法もある。この場合は炭酸ガス濃度計１３により前記くん蒸室１０内の一定の高さまで炭酸ガスの滞留が確認できたら供給弁４３と排出弁１４を閉止し、循環ブロワー１２にて攪拌して前記くん蒸室１０内の炭酸ガス濃度を均一にする。一定の高さは、前記くん蒸室１０の形状や容積から計算する又は試運転することにより、攪拌後に３０％〜６０％となる高さを求める。   Further, as a method for supplying carbon dioxide, there is a method that utilizes the property that carbon dioxide stays in a low part. In this case, when the carbon dioxide concentration meter 13 confirms the stay of carbon dioxide to a certain height in the fumigation chamber 10, the supply valve 43 and the discharge valve 14 are closed, and the circulation blower 12 is stirred to stir the fumigation chamber 10. The carbon dioxide concentration in the inside is made uniform. The constant height is calculated from the shape and volume of the fumigation chamber 10 or is subjected to a trial operation to obtain a height that is 30% to 60% after stirring.

産業上の利用の可能性Industrial applicability

本発明は、甘柿果実を生産、処理、流通、販売する産業で利用される。   The present invention is used in industries that produce, process, distribute, and sell sweet potato fruit.

１：甘柿果実のくん蒸方法、 ２：甘柿果実のくん蒸装置、
４：甘柿果実、 ５：コンテナ、
１０：くん蒸室、 １２：循環ブロワー、
１３：炭酸ガス濃度計、 １４：排気路、
１５：排気弁、 １６：自動排気弁、
１７：炭酸ガス濃度計ガスサンプル供給路、
１８：自動弁制御配線、 １９：炭酸ガス濃度調整手段、
２０：希釈炭酸ガス供給装置、 ２１：炭酸ガス容器、
２２：炭酸ガス供給路、 ２３：エアーコンプレッサー、
２４：エアー供給路、 ２５：ガス混合装置、
２６：希釈炭酸ガス供給路、 ２７：供給弁、
２８：自動供給弁、 ３０：温度調整装置、
３１：温度調整装置室内機、 ３２：温度調整装置室外機、
３３：冷媒配管、 ４０：炭酸ガス供給装置、
４１：炭酸ガス容器、 ４２：炭酸ガス供給路、
４３：供給弁。 1: fumigation method of sweet potato fruit, 2: fumigation device of sweet potato fruit,
4: Sweet potato fruit, 5: Container
10: fumigation chamber, 12: circulation blower,
13: Carbon dioxide concentration meter, 14: Exhaust passage,
15: Exhaust valve, 16: Automatic exhaust valve,
17: Carbon dioxide concentration meter gas sample supply path,
18: Automatic valve control wiring, 19: Carbon dioxide concentration adjusting means,
20: Diluted carbon dioxide supply device, 21: Carbon dioxide container,
22: Carbon dioxide supply path, 23: Air compressor,
24: Air supply path, 25: Gas mixing device,
26: Diluted carbon dioxide gas supply path, 27: Supply valve,
28: Automatic supply valve, 30: Temperature control device,
31: Temperature adjusting device indoor unit, 32: Temperature adjusting device outdoor unit,
33: Refrigerant piping, 40: Carbon dioxide supply device,
41: Carbon dioxide container, 42: Carbon dioxide supply channel,
43: Supply valve.

Claims (4)

害虫の寄生した甘柿果実をくん蒸室に収納し炭酸ガスでくん蒸し害虫を駆除する甘柿果実の炭酸ガスくん蒸方法において、前記くん蒸室の内部温度を温度調整装置により−４℃以上４℃以下に調整することを特徴とする甘柿果実の炭酸ガスくん蒸方法。 In the method of carbon dioxide gas fumigation of sweet potato fruit in which the sweet potato fruit infested with pests is stored in a fumigation chamber and fumigated with carbon dioxide gas, the internal temperature of the fumigation chamber is -4 ° C or higher and 4 ° C or lower by a temperature control device. A carbon dioxide fumigation method of sweet potato fruit characterized by adjusting to くん蒸室内の炭酸ガス濃度を３０％〜６０％に調整及び維持し、くん蒸処理時間を２４時間〜４８時間とすることを特徴とする請求項１記載の甘柿果実の炭酸ガスくん蒸方法。 The method for fumigating sweet potato fruit carbon dioxide according to claim 1, wherein the carbon dioxide concentration in the fumigation chamber is adjusted and maintained at 30% to 60%, and the fumigation time is 24 to 48 hours. くん蒸室内の炭酸ガス濃度を測定し、濃度が設定値より低下した場合に炭酸ガスを追加投入によりくん蒸室内の炭酸ガス濃度を維持することを特徴とする請求項１または２記載の甘柿果実の炭酸ガスくん蒸方法。 The carbon dioxide concentration in the fumigation chamber is measured by measuring the carbon dioxide concentration in the fumigation chamber, and the carbon dioxide concentration in the fumigation chamber is maintained by adding carbon dioxide when the concentration falls below a set value. Carbon dioxide fumigation method. 害虫はカイガラムシ類であることを特徴とする請求項１〜３のいずれかに記載の甘柿果実の炭酸ガスくん蒸方法。 The method for fumigating a sweet potato fruit carbon dioxide gas according to any one of claims 1 to 3, wherein the pest is a scale insect.
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