JP2015167486A - Bedbug extermination method and bedbug extermination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique that exterminates and kills bedbugs with carbon dioxide safely and reliably.SOLUTION: A bedbug extermination method concerning the present invention is characterized in that the bedbugs 9 are buried in an atmosphere of carbon dioxide for 10 hours or more, and reliably killed if the volume concentration of the carbon dioxide is 65% or more in an extermination-completed state. An article 7 to exterminate the bedbugs is stored in the inside of a container 5, and a control small container 8 storing live bedbugs 9 for control is disposed in the container 5. When the carbon dioxide is filled in the container 5, the carbon dioxide enters the control small container 8, and it is confirmed that the bedbugs 9 for control are killed, and thereby the bedbug extermination of the article 7 can be completed. A pressure-regulating valve 11 is installed in the container 7, and the inside of the container 5 is filled with the carbon dioxide. Then, air and/or excessive carbon dioxide initially existing in the container 5 can be evacuated outside the container 5 from the pressure-regulating valve 11 by merely a difference in pressure inside and outside.

Description

  The present invention relates to a method for controlling bed bugs (also known as bedbugs), and more particularly, a bed bug control method and bed bug control apparatus that removes or kills bed bugs that inhabit articles such as bags, clothes, and old books without harming the environment. About.

  The bed bug is eukaryotic in the biological classification, and is known as the animal kingdom, arthropod phylum, insect class, stink bug, bed bug family, bed bug genus, bed bug, and has traditionally been called Nanjing insects. Even though the names are similar, they are not lice but insects of the order stink bug.

  According to Wikipedia, a free encyclopedia, bedbugs suck blood regardless of whether they are larvae or adults, and use blood as a nutrient during their lifetime. When a person is bitten, saliva is injected into the body, and the substance contained in the saliva causes an allergic reaction, resulting in severe itching. There is an item of “cimex” in the Japanese-English dictionary based on the Latin dictionary written by Jesuit member Ambrogio Calepino, published in 1595. Therefore, the fact that it had invaded Japan at this time is praised.

  According to the “Nanjing Mushimata Float”, a natural scientist who has been called the Nanjing insect from the past, landed in Japan lurking in an old ship purchased during the Edo period and lived a lot in the Kobe Port area. It was said that he was doing. Even after the war, they lived in tatami mats and old books, and were exterminated by DDT in the summer cleaning. The organophosphorus insecticides that were used around 1965 worked well, and you can almost see them around 1975. Is gone.

  However, recently, with the increase in the number of foreign tourists, bed bugs attached to luggage and bodies have been generated one after another mainly in accommodation facilities. In Japan, there is almost no summer cleaning, so the Japanese who stayed at the accommodation have brought it to their homes and have become quite popular.

  Chemical substances such as pyrethroid compounds, organophosphorus compounds, and carbamate compounds are known as insecticides for controlling pests. Known pyrethroid compounds include allethrin, phthalthrin, resmethrin, permethrin, phenothrin, ciphenosulin, cypermethrin, etofenprox, prareslin, and empenthrin. In addition, fenitrothion, dichlorovos and the like are known as organic phosphorus compounds, and propoxal and the like are known as carbamate compounds.

  These chemical insecticides are known to be effective against bed bugs. However, the use of chemical pesticides may be allowed outdoors, but indoors, it goes against the safety and security of consumers and is no longer allowed today. Therefore, in place of chemical insecticides, a technique for extermination of bed bugs by heat drying treatment has been developed. However, in the present situation, bedbugs cannot be removed by heating in articles that may be altered by heat drying, such as bags, old books, and albums.

  As a result of various inventions, the inventor has come up with an idea whether carbon dioxide can be used to kill and control bed bugs. Carbon dioxide gas can be used indoors without harming the environment, and it is possible to disinfect even articles that are thought to live in bed bugs. Therefore, we decided to conduct a patent survey of pest control technology using carbon dioxide.

  As a prior art of pest control, Japanese Patent No. 3615289 (Patent Document 1) published as Japanese Patent Laid-Open No. 9-163927 on June 24, 1997, kills weevil by increasing the carbon dioxide concentration to 40% or more. A method for storing cereal insecticides is disclosed. The weevil is classified as an insect class, Coleoptera, weevil, genus weevil, and weevil. Bed bugs are common in the insect class, but bed bugs are stink bugs, which differ from the order of the weevil of the coleoptera. In other words, weevil and bedbugs are species that are so far apart that they differ by eye classification, and even if weevil can be killed by carbon dioxide, it cannot be determined whether it is effective against bed bugs without experimentation. is there.

In JP 2000-166451 (Patent Document 2) published on June 20, 2000, in order to control animal fleas and ticks, a dog with its face in an example is placed in a bag. An animal pest control method is disclosed which is hermetically stored and injected with an inert gas such as argon or carbon dioxide in a bag. Dog fleas are classified as insects, fleas, anemoneaceae, genus Inu flea, and ini fleas in terms of biological classification. Bed bugs are common in the class of insects, but bed bugs are stink bugs and differ from fleas, which are fleas, by eye classification. In other words, fleas and bed bugs are species that are so far apart that they differ by eye classification. Even if fleas can be killed by carbon dioxide, it is impossible to determine whether or not they are effective. is there.
In addition, ticks are classified as arthropods, spiders, ticks, clawaceae, genus genus, and crayfish. Bed bugs are common in the arthropod gates, but the bed bugs are insect class and differ from the spider mite class by class. In other words, mites and bed bugs are biological species that are far away from each other as they differ by class. Even if you can kill mites with carbon dioxide, you can't determine if it is effective against bed bugs unless you experiment.

  In Japanese Patent Application Laid-Open No. 2003-47386 (Patent Document 3) published on February 18, 2003, in order to control pests on articles such as cultural assets and cereals, the articles are stored in an insecticidal bag, An insecticidal method for injecting an inert gas, particularly carbon dioxide, into the bag is disclosed. The specification [0025] states that “Carbon dioxide has various physiological effects such as attraction, increased feeding, stagnation of memory, increased respiration, and anesthetic action against insects, and the concentration increases to 35% or more. There is a marked lethal effect. " However, insects are an extremely broad category, and there is no further specific mention of which insects are specifically killed. Among the investigations of the present inventors, only the weevil of Patent Document 1 and the flea of Patent Document 2 were found in the prior applications of Patent Document 3. The aforementioned mites are not insects. Therefore, it is unclear exactly what kind of insects were specifically obtained by the description in Patent Document 3 that carbon dioxide has a lethal action on insects in general. In particular, the specific fact that carbon dioxide has a lethal action against bed bugs cannot be inferred. Therefore, it cannot be determined whether or not the bed bug is effective unless it is tested.

In Japanese Patent No. 36553573 (Patent Document 4) published as Japanese Patent Application Laid-Open No. 2004-129581 on April 30, 2004, dry foods and intermediate products are treated with carbon dioxide to kill mites and beetles. An insecticidal method is disclosed in which it is placed in a substituted drying chamber and heated at 45 ° C. to 48 ° C. for 2 hours or more. As described above, the mites are arthropoda, spiders, and mites. Bed bugs are common in the arthropod phylum, but the bed bugs are insect class, which differs from spider mites by class classification, and bed bugs and mites are species that are considerably separated.
In addition, beetles are organisms belonging to the class of insects and Coleoptera, for example, weevil. Bed bugs are common in the class of insects, but bed bugs are stink bugs, which differ from Coleoptera by eye classification. In other words, beetles and bed bugs are species that are so far apart that they differ by eye classification.
Therefore, even if mites and beetles can be killed with carbon dioxide, it cannot be determined whether or not the bed bug is effective unless it is tested.

Japanese Laid-Open Patent Publication No. 2004-132020 published on April 30, 2004 (Patent Document 5) describes the use of air in an underfloor space to control pests such as termites and wood-indestructible fungi that inhabit houses. A pest control method is disclosed in which part or all of the pest is replaced with carbon dioxide to control the pest.
However, termites are organisms belonging to the class of insects, cockroaches, and termites, and the species of bed bugs of the order of the insect class Stink bug are different species with different eyes. Therefore, even if termites can be killed with carbon dioxide, it cannot be determined whether or not the bed bugs are effective unless they are tested.
In addition, even if the domain is eukaryotic, the biological classification of wood-indestructible fungi belongs to the fungal kingdom, while bedbugs belong to eukaryotes, animal kingdoms, and insect class, and wood-indestructible fungi and bedbugs are eukaryotic. Even if living things are common, they are almost different kinds of living things with different fields. Therefore, even if wood-indestructible bacteria can be killed by carbon dioxide, it cannot be determined whether or not the bed bug is effective unless it is tested.

  As mentioned above, it is unpredictable whether bed bugs can be extinguished with carbon dioxide even if different species in the classification of bed bugs and eyes can be extinguished or killed with carbon dioxide. No. For example, humans are eukaryotes, chordates, mammals, primates, humans, human genera, and humans. On the other hand, horses are eukaryotes, chordae, mammals, equine, equine, equine, equine. That is, both are common in the class of mammals, but humans are primates, horses are horses, and differ by eye classification. Physiological phenomena are quite different between humans and horses, and it is unpredictable that humans have the same physiological phenomena just because they have specific physiological phenomena. There is no method other than determining these all by experiment. Even though it is common to insect classes, the species belonging to the insect class are various, and the ecosystems are often unknown as they become micro-organisms, and little is known about the physiological phenomena. However, experiments are the only means for physiological phenomena.

  On the other hand, the following documents using carbon dioxide gas in connection with bed bugs have been discovered. Japanese Patent Laid-Open No. 5-331014 (Patent Document 6) has been published on December 14, 1993 as a pest control method that partially includes bed bugs (Nankina insects) as a control organism and uses carbon dioxide gas in part with an insecticide. . In addition, bedbugs are attracting target organisms, and an attracting method using a part of carbon dioxide gas with an attractant is disclosed on September 6, 2012 as Japanese Translation of PCT International Publication No. 2012-520315 (Patent Document 7). Both of these documents will be described in detail later.

Japanese Patent No. 3615289 JP 2000-166451 A JP 2003-47386 A Japanese Patent No. 3653573 Japanese Patent Laid-Open No. 2004-132020 JP-A-5-331014 Special table 2012-520315 gazette

In JP-A-5-331014, which is Patent Document 6, insects such as cockroaches and Nanjing insects are expelled by spraying with insecticides such as pyrethroid compounds, organophosphorus compounds, carbamate compounds, fumigation, and smoke and trapped with adhesives. The pest control method to collect is described. In particular, [0003] of the specification describes that a preparation in which an active compound is dissolved in liquefied carbon dioxide, a fumigant, a smoke agent, and the like are used. However, no further explanation is given.
The role of the liquefied carbon dioxide gas used here is considered to be a carrier gas for transporting the dissolved insecticide component to a distant place. That is, when the liquefied carbon dioxide is released into the atmosphere, it rapidly expands by vaporization and spreads throughout the room, and the insecticide component rides on the whole room as the carbon dioxide gas is released. Therefore, carbon dioxide is a carrier gas, and there is no description or even suggestion of the effect of carbon dioxide on pests.

  Japanese Patent Application Publication No. 2012-520315, which is Patent Document 7, volatilizes an attracting composition containing an unsaturated aldehyde component and an organic acid component, which are attractants of a bed bug, at a desired location, thereby attracting the bed bug, A method for detecting, monitoring, or capturing is disclosed. In particular, claim 12 describes adding carbon dioxide to the composition. In the specification [0031], the effect of the attractant is improved by adding carbon dioxide, and the concentration of carbon dioxide is about 1% to about 50% by volume in the gas of the volatilized composition. Preferred is described. That is, it is determined that carbon dioxide gas having a concentration of about 1% to about 50% by volume has an attractive effect on bed bugs.

  However, this result completely contradicts the description in Japanese Patent Application Laid-Open No. 2003-47386 (Patent Document 3). As described above, Patent Document 3 discloses a method for killing general insects with carbon dioxide gas without disclosing specific insects. In the specification [0025], “Carbon dioxide has various physiological effects such as attraction, increased feeding, stagnation of memory, increased respiration, and anesthetic action against insects, and it is prominent when the concentration increases to 35% or more. It has a lethal effect ”. That is, carbon dioxide gas with a concentration of 35% or more has been determined to have a remarkable lethal action on insects. From the description, it can be expanded to have a lethal action on bed bugs, which are insects. Can be considered. On the other hand, in Patent Document 7 which specifically studied bed bugs, it is determined that carbon dioxide gas having a volume concentration of about 1% to about 50% has an attractive effect on bed bugs. The present inventor judges that Patent Document 3 has no specific description for bed bugs, and therefore can not trust the lethal action against bed bugs.

In summary, Patent Document 3 claims that carbon dioxide at a concentration of 35% or more has a remarkable lethal action on insects, and Patent Document 6 claims only that carbon dioxide has a carrier ability of an insecticide component. In Patent Document 7, it is claimed that carbon dioxide having a concentration of 1% to 50% has an attractive effect on bed bugs. The physiological effects of carbon dioxide gas on bed bugs in these three documents are completely different. The knowledge that carbon dioxide has a scientifically effective extermination and killing effect on bed bugs has not been determined in the past, and must be unknown. In particular, the effect of carbon dioxide on bed bugs is known only for the carrier ability of Patent Document 6 and the attracting action of Patent Document 7, and is otherwise unclear.

Therefore, an object of the present invention is to experimentally determine that carbon dioxide has an effect of extermination / killing bed bugs, and based on this experimental fact, a method for extermination of bed bugs by extinguishing / killing bed bugs with carbon dioxide gas Is to provide. Further, an object of the present invention is to provide a bed bug removal method for removing and killing bed bugs in articles by burying articles suspected of having bed bugs in a carbon dioxide atmosphere, and to provide a bed bug removal apparatus. is there. Carbon dioxide does not harm the environment or people like chemical insecticides, and it does not use a heating method, so it does not hurt objects and can provide a safe and reliable bed bug control method.

  The present invention has been made to solve the above problems, and a first embodiment of the present invention is a bed bug extermination method in which bed bugs are buried in a carbon dioxide atmosphere to remove them.

  The second form of the present invention is a bed bug extermination method in which bed bugs are buried in a carbon dioxide atmosphere for 10 hours or more to kill them.

  A third aspect of the present invention is a bed bug extermination method in which the volume concentration of carbon dioxide in the atmosphere is 65% or more in a state where the extermination is completed.

  According to a fourth aspect of the present invention, an article for removing bed bugs is accommodated in a container, the container is filled with carbon dioxide, the container is sealed, and the article is buried in an atmosphere of carbon dioxide. Then, a bed bug extermination method for extinguishing bed bugs inhabiting the article.

  According to a fifth aspect of the present invention, there is provided a method for controlling bed bugs in which the article is buried in the carbon dioxide atmosphere for 10 hours or more to kill dead bed bugs in the article.

  A sixth aspect of the present invention is a bed bug extermination method in which the volume concentration of carbon dioxide in the atmosphere is 65% or more in a state where the extermination is completed.

According to a seventh aspect of the present invention, a control small container containing a live bed bug for control is arranged in the container, and carbon dioxide filled in the container also enters the control small container, This is a method for extermination of bed bugs by confirming that the bed bugs are dead and completing the bed bug extermination of the article.

According to an eighth aspect of the present invention, when the pressure regulating valve is attached to the container and the inside of the container is filled with carbon dioxide, the pressure of the carbon dioxide in the container becomes atmospheric pressure. In this method, the air and / or excess carbon dioxide initially present in the air is exhausted from the pressure regulating valve to the outside of the container only by the pressure difference between the inside and outside.

  According to a ninth aspect of the present invention, a bed bug extermination method is provided in which a bag is disposed in the container together with the article and / or the control small container, and the container is filled with carbon dioxide to seal the container. It is.

  According to a tenth aspect of the present invention, a dry ice block is introduced into the container to fill the inside of the container with an atmosphere of carbon dioxide, and the dry ice block still remains even in the state of extermination of bed bugs. This is a method for extermination of bed bugs.

  The eleventh aspect of the present invention comprises a container for accommodating an article to be rid of bed bugs therein, a control small container disposed in the container and for accommodating live bed bugs for control, and An article loading opening opened in the container for loading the article into the container; opening and closing means for opening and closing the article loading inlet; and carbon dioxide from the opened article loading inlet into the container. A bed bug extermination device comprising escape means for escaping air and / or excess carbon dioxide initially present in the container to the outside when the opening and closing means is closed by filling.

  In a twelfth aspect of the present invention, the container includes a container body having an opening surface and a lid body that detachably closes the opening surface, and the opening surface and the lid body are the article loading inlet and the opening / closing means. Are the bed bug extermination devices corresponding to each.

  A thirteenth aspect of the present invention is a bed bug extermination device in which a pressure regulating valve attached to the container corresponds to the escape means.

  In a fourteenth aspect of the present invention, when the escape means closes the opening surface of the container main body with the lid, the peripheral surface of the lid is in contact with the peripheral top surface of the container main body. Closely seal the opening surface, and when the internal pressure of the container body exceeds atmospheric pressure, the peripheral surface floats away from the peripheral top surface, and when the internal pressure becomes equal to atmospheric pressure, the peripheral surface Is a bed bug extermination device configured by a mechanism closely contacting the peripheral top surface.

According to the 1st form of this invention, the bed bug extermination method which immerses and removes bed bugs in the atmosphere of a carbon dioxide is provided.
According to JP 2012-520315 (Patent Document 7), which is a conventional technology, carbon dioxide is an attractant for bed bugs. However, this conventional knowledge is incorrect, and according to the present inventors' research, carbon dioxide is bed bugs. It became clear for the first time that it was an extermination substance. Although carbon dioxide is a substance that is safe for the human body and the environment, depending on its concentration, gaseous carbon dioxide, that is, carbon dioxide, has no effect on workers or goods even if it comes into contact with workers or goods. Therefore, it has the advantage that it can be removed safely and safely, and it can be used indoors and handled easily. If the powdered dry ice is gasified simply by quantifying and discharging the liquefied carbonic acid into the container, it becomes powdery dry ice and carbon dioxide gas, eventually becoming carbon dioxide gas, which can be filled with carbon dioxide gas. The dry ice block has an advantage that carbon dioxide gas is continuously released over a long period of time, and the volume concentration of carbon dioxide can be maintained at a high concentration over a long period of time. Of course, high pressure carbon dioxide gas may be injected and injected. Since the molecular weight of carbon dioxide is 44 and the average molecular weight of air is 28.8, carbon dioxide has a characteristic that it is heavier than air. Even if carbon dioxide gas is put into a container containing air from above, the carbon dioxide gas can sink under the air due to gravity, and the carbon dioxide gas can be piled up from below to easily overflow the air from above. Also, if powdery dry ice or dry ice block is placed at the bottom of the container, or if liquefied carbonic acid is poured out, carbon dioxide accumulates from the bottom of the container and expels air upward, and the inside of the container is Can be easily charged. Bed bugs can be easily removed by simply burying bed bugs in this carbon dioxide atmosphere.

According to the 2nd form of this invention, the bed bug extermination method which immerses bed bugs in the atmosphere of a carbon dioxide for 10 hours or more and kills them is provided.
The present inventor prepared a container for cooking in order to conduct an experiment for killing bed bugs. This container is composed of a polypropylene container body and a polyethylene lid body, and the lid body is configured to close tightly to the upper peripheral edge of the container body and close the opening. The carbon dioxide gas tends to leak gradually. Five bed bugs were put into a glass petri dish without a lid, and the petri dish was placed at the bottom of the container body. The bed bug confirmed that he could not climb the wall around the petri dish. A dry ice block is placed on the bottom of the container body, the container is filled with carbon dioxide gas, the opening of the container body is closed tightly with a lid, and the dry time is measured while measuring the time from the initial filling state. The behavior of bed bugs was observed under the condition that the ice block was slight but remained until the end. As a result, when bed bugs were buried in a carbon dioxide atmosphere for a treatment time of 10 hours or more, all of the five bed bugs were dead immediately after the treatment time. Thereafter, the petri dish was taken out from the container and placed in air at room temperature. Even after one day had passed, there was no revival of bed bugs, and the dead state was maintained. The same operation was followed immediately after the treatment time of 0.2 hours and 4 hours, and the bed bugs were in a convulsive state. Immediately after the treatment time of 7 hours, it seemed dead, but when it was moved to the air and passed for 1 day, it was convulsed but recovered. However, it was proved that if bed bugs were buried in an atmosphere of carbon dioxide for 10 hours or more, even if they were transferred to the air, they would not be revived in a dead state and could be completely killed.

According to the 3rd form of this invention, the bed bug extermination method whose volume concentration of the carbon dioxide of the said atmosphere is 65% or more is provided.
An experiment for killing bed bugs under different conditions was performed using powdered dry ice instead of the dry ice block. In the initial state, the container was filled with carbon dioxide gas, and the container was sealed, and the carbon dioxide concentration in volume ratio was measured according to the elapsed time. The powdery dry ice gradually sublimed and disappeared from the container in about 0.5 hours. The results are 94% in the initial state (0 hour), 94% after 0.2 hours, 84% after 4 hours, 75% after 8 hours, 70% after 12 hours, 65% after 17 hours. %, 61% after 24 hours. At the end of 17 hours, the bed bugs were completely killed and did not resurrect. Therefore, it was experimentally proved that bed bugs were completely killed if they were immersed in 65% or more of carbon dioxide gas for 17 hours. In addition, the present inventor repeated the bed bug killing experiment while changing the conditions, and set the bed bug to about 100% (full state) at the beginning for 10 hours or more and gradually decreasing it in the carbon dioxide gas of 65% or more at the minimum. It has been experimentally proven that bed bugs will die if buried in

According to the fourth aspect of the present invention, an article for removing bed bugs is accommodated in the container, the container is filled with carbon dioxide, the container is sealed, and the article is placed in an atmosphere of carbon dioxide. There is provided a method for extermination of bed bugs that is buried in the bed and extinguish bed bugs that live in the article.
Articles that should be rid of bed bugs are items that customers desire to remove bed lice, and are likely to live in bed bugs. For example, bags, old books, albums, and other items. When an article is placed inside the container and filled with carbon dioxide gas, the article is also filled with carbon dioxide gas, and bed bugs that live inside the article are removed. Since only carbon dioxide is processed at room temperature, neither heat treatment nor insecticide treatment is performed on the goods, the safety and security of customers, goods and workers are guaranteed, and the treatment in the customer's room is extremely safe and secure. is there.

According to a fifth aspect of the present invention, there is provided a bed bug control method for immersing the article in the carbon dioxide atmosphere for 10 hours or more and killing bed bugs living in the article.
This form is common to the second form, and the operation effect is the same as that of the second form. Therefore, if the article is immersed in the carbon dioxide atmosphere for 10 hours or more, the inside of the article is filled with the carbon dioxide atmosphere for 10 hours or more, and the bed bug in the article is killed. it can.

According to the sixth aspect of the present invention, there is provided a bed bug extermination method in which the volume concentration of carbon dioxide in the atmosphere is 65% or more when the extermination is completed.
This embodiment is common to the third embodiment, and its operation and effects are substantially the same as those of the third embodiment. If the article is buried in the atmosphere of carbon dioxide for 10 hours or more and at the same time the volume concentration of carbon dioxide gas in the atmosphere is kept at least 65% during the burying time, the inside of the article It is filled with an atmosphere of carbon dioxide having a concentration of 65% or more for 10 hours or more, and bed bugs in the article can be surely killed. Therefore, the bed bug in the article can be surely killed.

According to the seventh aspect of the present invention, a control small container containing a live bed bug for control is disposed in the container, and carbon dioxide filled in the container also enters the control small container, There is provided a method for extermination of bed bugs by confirming that the bed bugs for control have been killed and completing the bed bug removal of the article.
Carbon dioxide gas with a concentration of 65% or more is used to determine whether bed bugs inside the article have been killed with carbon dioxide gas (also called carbon dioxide gas) when carbon dioxide gas is used to treat the items that may be susceptible to bed bugs. It is difficult to convince the customer in the presentation only with the setting condition that the bed bug was removed or the bed bug was removed for 10 hours or more. Therefore, the bed bug extermination method of this embodiment makes it possible to visually recognize the death of bed bugs in the transparent control small container from the outside of the transparent container. Therefore, it is desirable to set the container and the control small container to be transparent so that the articles in the container and bed bugs in the control small container can be visually recognized from the outside of the container. The bed bug is a small insect, so if it is difficult to make the control bed bug visible from the outside of the container from the viewpoint of transparency, open the lid of the container and confirm the death of the bed bug Good. In this case, the transparency of the container and / or the control container is not required.

According to the eighth aspect of the present invention, when a pressure regulating valve is attached to the container, and the inside of the container is filled with carbon dioxide, the pressure of carbon dioxide in the container becomes atmospheric pressure. There is provided a bed bug control method in which air and / or excess carbon dioxide initially present in the container is evacuated to the outside of the container by only a pressure difference between the inside and outside of the pressure regulating valve.
When dry ice is put inside the container and the total amount of dry ice is vaporized under atmospheric pressure, if the volume of carbon dioxide gas exceeds the inner volume of the container, it will initially exist outside the container from inside the sealed container There is a need to vent the air and excess carbon dioxide. The pressure regulating valve operates only by a pressure difference between the inside and outside of the container, and has an action of venting internal gas from the inside to the outside when the internal pressure becomes higher than the external pressure. In this embodiment, the external pressure is atmospheric pressure. The container is initially filled with atmospheric pressure air. The dry ice to be added is optimally powdered dry ice or dry ice block that sublimes, and liquefied carbonic acid may be used. This is because when liquefied carbonic acid is added, it immediately changes to carbon dioxide and powdered dry ice. Pressurized carbon dioxide gas may be added. Since carbon dioxide gas with a molecular weight of 44 is heavier than air with an average molecular weight of 28.8, it has the property of diving below the air layer, and the air is pushed up by the carbon dioxide gas filled. When the internal pressure becomes larger than the external pressure (atmospheric pressure) due to the filling of carbon dioxide gas, first the air and then the excess carbon dioxide gas are vented from the pressure regulating valve of this embodiment. The pressures coincide and the venting from the pressure regulating valve is stopped. In the initial state, the container is preferably filled with carbon dioxide so as to be filled with carbon dioxide gas having a concentration of nearly 100%.

  According to the ninth aspect of the present invention, a bed bug is placed in the container together with the article and / or control small container, and the bag is filled with carbon dioxide to seal the container. Disinfection methods are provided. In the case of powdered dry ice or liquefied carbonic acid, powdery dry ice particles are ejected in a scattered manner, so if carbon dioxide is ejected into the bag body, the dry ice particles will fit inside the bag body. It is possible to prevent the dry ice particles from being scattered outside the bag body. Therefore, since the dry ice particles do not enter the article or the control small container, there is no influence on the article, and the dry ice particles can be prevented from adversely affecting the bed bugs in the control small container.

  According to the tenth aspect of the present invention, a dry ice block is introduced into the container to fill the inside of the container with an atmosphere of carbon dioxide, and the dry ice block still remains even in the state of extermination of bed bugs. A method for combating bed bugs is provided. Unlike powdered dry ice, the dry ice block has a small surface area and therefore has a low sublimation rate, and the dry ice block remains in the container or bag for a long time. Therefore, in the initial state, the carbon dioxide concentration in the container is set to a high concentration close to 100%, the container is sealed, and the dry ice continues to sublime over time, and the dry ice block still remains even after the removal is completed. If set as described above, the inside of the container can be continuously filled with high-concentration carbon dioxide gas for a long period of time, and bed bugs can be surely killed under the set conditions.

According to the eleventh aspect of the present invention, a bed bug extermination device is provided. The bed bug extermination device according to the present embodiment includes a container for accommodating an article to be rid of bed bugs therein, a control small container disposed in the container and accommodates a living bed bug for control, and the container An article loading opening opened in the container for charging the article into the container, an opening / closing means for opening and closing the article loading inlet, and carbon dioxide filling the container from the opened article loading inlet. When the opening / closing means is closed, the first air and / or excess carbon dioxide existing inside the container is escaped to the outside.
The size of a container is variously designed according to the size of the articles accommodated inside. The container is preferably set to be transparent in order to see through the inside. The material of the container is preferably a material capable of sealing carbon dioxide gas (carbon dioxide gas), and at least an inexpensive material having low carbon dioxide gas permeability is preferable. The size of the control small container is preferably a size that can accommodate the bed bug for control, and a transparent material that can observe the behavior of the bed bug inside from the outside is desirable. Bed bugs cannot fly because they cannot fly, but when they have a lid, they must be configured to allow carbon dioxide gas to enter them. Moreover, the surrounding wall of the control small container needs to have high slipperiness so that bed bugs cannot climb. The article inlet is configured to be sized to allow articles to be inserted into the container, and the opening / closing means for opening and closing the article inlet is configured to be in close contact with the container and to seal the carbon dioxide gas inside the container when closed. . The escape means fills the inside of the container with carbon dioxide from the opened article loading inlet and closes the opening / closing means. The air and / or excess carbon dioxide present in the air escapes to the outside.

According to a twelfth aspect of the present invention, the container includes a container main body having an opening surface and a lid body that detachably closes the opening surface, and the opening surface and the lid body are the article loading inlet and the A bed bug extermination device corresponding to each opening / closing means is provided.
A container for loading an article to remove bed bugs is composed of a container body having an opening surface on the upper front surface of the container body and a lid body for opening and closing the upper opening surface so as to easily load and remove the article. The In this case, the opening surface becomes the article loading entrance, and the lid corresponds to the opening / closing means. When the container body is covered with a lid, the contact surfaces of the two are in close contact with each other, and the two are engaged with each other, and a sealed structure is employed so that carbon dioxide gas in the container body does not leak.

  According to the thirteenth aspect of the present invention, there is provided a bed bug extermination device in which a pressure regulating valve attached to the container corresponds to the escape means. A pressure regulating valve is used as an escape means, and the pressure regulating valve is attached to the container body or the lid, but it is preferable to be attached to the lid so that it can be easily handled from above. There is an advantage that does not get in the way.

According to the fourteenth aspect of the present invention, there is provided a bed bug extermination device that does not use a pressure regulating valve as the escape means but uses a contact surface structure between a lid and a container body as the escape means.
The external pressure of the container is atmospheric pressure, and when the internal pressure of the container becomes larger than atmospheric pressure, the lid body may be lifted to release the internal gas, and the lid body may be dropped and closely contacted. Therefore, the escape means of the present embodiment is configured such that when the opening surface of the container body is closed by the lid body, the peripheral surface of the lid body is in close contact with the peripheral top surface of the container body. When the internal pressure of the container body exceeds the atmospheric pressure, the peripheral surface floats away from the peripheral top surface, and when the internal pressure becomes equal to the atmospheric pressure, the peripheral surface becomes the peripheral top. The escape means is constituted by a mechanism closely contacting the surface.

FIG. 1 is a schematic view of a first embodiment in which a bed body that contains an article and a control small container is closely fitted and closed with a lid, and is killed using powdered dry ice, in a bed bug extermination device according to the present invention. It is explanatory drawing. FIG. 2 is a bed bug extermination device according to the present invention, a second embodiment in which a container body containing articles and a small control container is covered with a lid, pressed and closed with a rotating clip, and killed using powdered dry ice. It is a schematic explanatory drawing. FIG. 3 is a schematic illustration of a third embodiment of the bed bug extermination device according to the present invention, in which a container body with an article and a small control container is fitted and closed with a lid, and is killed using powdered dry ice. FIG. FIG. 4 is a bed bug extermination device according to the present invention, in which a container body with an article and a small control container is overlapped with a lid facing and closed, and is killed using powdered dry ice. It is a schematic explanatory drawing. FIG. 5 is a schematic explanatory view of the fifth embodiment in which the apparatus of the first embodiment is used, the article and the control small container are arranged in the container, and powdery dry ice is deposited inside the bag body. FIG. 6 is a schematic explanatory view of a sixth embodiment in which the apparatus of the second embodiment is used, the article and the control small container are arranged in the container, and powdery dry ice is deposited inside the bag body. FIG. 7 is a schematic explanatory view of a seventh embodiment in which the apparatus of the second embodiment is used, a dry ice block is used instead of powdered dry ice, and the dry ice block remains in a state where the removal is completed. FIG. 8 shows that the apparatus and the control small container are arranged in the container using the apparatus of the third embodiment, the dry ice block is put in the bag, and the dry ice block remains even after the removal is completed. It is a schematic explanatory drawing of embodiment.

As shown below, embodiments and examples of bed bug removal methods and bed bug removal apparatuses according to the present invention will be described in detail with reference to the drawings and tables.
FIG. 1 is a schematic view of a first embodiment in which a bed body that contains an article and a control small container is closely fitted and closed with a lid, and is killed using powdered dry ice, in a bed bug extermination device according to the present invention. It is explanatory drawing.

  FIG. 1 (1 </ b> A) shows a state diagram in which the lid 4 is removed from the container body 2. The bed bug extermination device 1 of the present invention is configured by arranging an article 7 to be rid of bed bugs and a control small container 8 in a container body 2, and a necessary amount of dry ice 10 is placed in a gap between the container body bottom surface 2 a. Distributed. In the first embodiment, powdery dry ice is used as the dry ice 10, and it may be sprayed with cryonite, or even when liquefied carbonic acid is sprayed, the form instantly changes to powdery dry ice. A living control bed bug 9 is placed in the control small container 8. A seal receiving means 20a is formed on the entire upper end of the vertical wall surface of the container body 2.

  FIG. 1 (1B) shows a state diagram in which the lid 4 is closely fitted so as to close the opening surface 3 of the container main body 2. A sealing presser 20b is formed on the entire periphery of the lower surface of the lid body 4, and the sealing receiving means 20a of the container body 2 and the sealing presser means 20b of the lid body 4 are formed to be inclined so that both are pressed. When fitted, the inclined surfaces of the two are pressed against each other and are in close contact with each other. The sealing means 20 is constituted by both the sealing receiving means 20a and the sealing pressing means 20b. Therefore, the inside of the container 5 formed from the container main body 2 and the lid body 4 is sealed from the outside. In the first embodiment, since the sealing means 20 is constituted by both the sealing receiving means 20a and the sealing pressing means 20b, excess carbon dioxide gas is prevented from escaping from the periphery of the lid body 4. As the carbon dioxide escape means 22 described later, the lid 4 is provided with a pressure regulating valve 11, and when the internal pressure of the container 5 is larger than the external atmospheric pressure, the internal pressure difference between the inside and the outside is just The gas escapes to the outside through the pressure regulating valve 11.

  The dry ice 10 is powdery dry ice (also known as powder dry ice), and has a large surface area, so it sublimes rapidly and becomes carbon dioxide. In the container 5, air at atmospheric pressure is present from the beginning, and the pressure of carbon dioxide gas is applied to the container 5. Run away to the outside. Since the molecular weight of CO 2 is 44 and the average molecular weight of air is 28.8, carbon dioxide is heavier than air, and carbon dioxide is deposited on the bottom inside the container 5. Since the weight of the dry ice 10 to be charged is larger than the volume of the container at room temperature and atmospheric pressure, the entire amount of air that originally existed escapes to the outside, and the inside of the container 5 is theoretically generated by carbon dioxide. To charge. Further, since the dry ice 10 exists on the inner bottom surface 2a of the container body, the carbon dioxide gas further escapes from the pressure regulating valve 11, and the state of the carbon dioxide gas 100% is maintained inside the container 5 for a long time.

  The total weight of the dry ice 10 to be charged is adjusted in relation to the time during which the inside of the container 5 is kept at 100% carbon dioxide gas. For example, when the bed bug for control dies in 8 hours at a carbon dioxide concentration of 100%, the weight setting of the dry ice 10 in such an amount that the carbon dioxide concentration inside the container 5 is maintained at 100% only for 8 hours. Is desired. However, even if the concentration is not maintained at 100% for 8 hours, the concentration is gradually attenuated, and the amount of dry ice may be adjusted so that bed bugs are killed at the stage when the extermination is completed. Various quantities such as dry ice weight and death time depend on the volume of the container 5 and the temperature in the container. Therefore, it is desirable to adjust to an optimum value in consideration of the processing cost.

  FIG. 1 (1C) is a state diagram in which the bed bug 9 for control has been killed, and shows a complete state of the removal process. In this extermination complete state, the bed bug 9 for control has died, and the dry ice 10 has also disappeared. As described above, the dry ice 10 may disappear during the removal process, or may still remain at the time of completion. The article 7 in the container 5 is an article for extermination of bed bugs, and the bed bugs live inside, and when the carbon dioxide treatment of the present invention is performed, the bed bugs that originally inhabited are killed inside the article 7 It is difficult to confirm that. Therefore, in order to determine whether or not the bed bug in the article has been killed, the life or death of the bed bug 9 for control can be confirmed from the outside. When it is confirmed from the outside by the naked eye or a magnifier that the control bed bug 9 is confirmed, it can be sufficiently assumed that the bed bug living inside the article is also killed. This method is more reliable and realistic than estimating the death of bed bugs based on carbon dioxide gas concentration and treatment time.

FIG. 2 is a bed bug extermination device according to the present invention, a second embodiment in which a container body containing articles and a small control container is covered with a lid, pressed and closed with a rotating clip, and killed using powdered dry ice. It is a schematic explanatory drawing.
In FIG. 2, only the structure of the sealing means 20 comprising the sealing receiving means 20a and the sealing presser means 20b is different from that of FIG. 1, and the other members are the same in configuration, operation and effect as in FIG. For explanation, other explanations are omitted. In this 2nd Embodiment, the rotation clip is provided in the right-and-left vertical wall surface of the container main body 2 as the sealing pressing means 20b. This rotating clip has a rotating end on a fixed base provided on a vertical wall surface, and is provided with a rotor at the tip, and is configured to be rotatable as can be seen from (2A) and (2B). Further, the right and left end portions of the lid body 4 become the seal receiving means 20a, and as shown in (2B), the closure of the lid body 4 is locked by the rotor pressing the upper surface of the seal receiving means 20a. It is configured. Thus, the sealing means 20 is comprised by the sealing receiving means 20a and the sealing pressing means 20b. When the sealing receiving means 20a is strongly pressed by the sealing pressing means 20b, the carbon dioxide gas generated inside cannot escape from the periphery of the lid 4 to the outside. Also in the second embodiment, the pressure regulating valve 11 is provided as a carbon dioxide escape means 22 to be described later, and excess carbon dioxide gas is released from the pressure regulating valve 11 to the outside. The inside of the container 5 is almost 100%. The carbon dioxide gas is sealed so that it is maintained at a concentration of.

FIG. 3 is a schematic illustration of a third embodiment of the bed bug extermination device according to the present invention, in which a container body with an article and a small control container is fitted and closed with a lid, and is killed using powdered dry ice. FIG.
In FIG. 3, the pressure-tight sealing means between the lid body 4 and the container body 2 as described above is not configured, and the pressure regulating valve 11 is not provided in the lid body 4. A horizontal peripheral top surface 2 b is formed around the entire upper end of the vertical wall of the container body 2, and a horizontal smooth peripheral surface 4 a is formed around the entire lower surface of the lid 4. When the lid 4 is placed on the container main body 2 so as to close the opening surface 3, the peripheral surface 4 a of the lid 4 is placed in contact with the peripheral top surface 2 b of the container main body 2. . The peripheral top surface 2b and the peripheral surface 4a are in a contact-mounted state, but are not locked, which is a feature of the third embodiment. Other configurations and operational effects are the same as those of the first embodiment shown in FIG. 1, and thus description thereof will be omitted. Only different points will be described here.

  In Embodiment 3 of FIG. 3, when the dry ice 10 sublimes and the internal pressure in the container 5 rises above the atmospheric pressure, the lid 4 receives a force in the upward direction due to the pressure difference, and the peripheral surface 4a is the peripheral top surface. The air is lifted from 2b, the internal gas is released from the lifted gap, and the internal pressure is reduced to atmospheric pressure. As a result, the peripheral surface 4a falls and contacts the upper surface of the peripheral top surface 2b. That is, when the sublimation of the dry ice 10 continues, the rising and falling of the peripheral surface 4a are repeated, and the excess carbon dioxide gas is continuously released to the outside while the internal pressure is maintained at substantially atmospheric pressure. Such a gas venting mechanism is referred to as escape means 22 in the present invention, and in this third embodiment, the combination of the peripheral surface 4a and the peripheral top surface 2b constitutes the escape means 22. In the first embodiment and the second embodiment, the pressure regulating valve 11 exists as an example of the escape means 22. In the third embodiment, a combination of the peripheral surface 4a and the peripheral top surface 2b is provided as the carbon dioxide escape means 22, and the excess carbon dioxide gas is discharged from the escape means 22 to the outside. The carbon dioxide gas is sealed while maintaining the inside of the container at a high concentration. However, since the escape means 22 is not sealed, there is a wasteful discharge of carbon dioxide gas, and there is a weak point that the carbon dioxide gas concentration cannot be maintained at a high concentration for a long time.

FIG. 4 is a bed bug extermination device according to the present invention, in which a container body with an article and a small control container is overlapped with a lid facing and closed, and is killed using powdered dry ice. It is a schematic explanatory drawing.
The fourth embodiment shown in FIG. 4 is different from FIG. 3 only in that the lid 4 is placed on the container body 2 in the reverse state, and the other configurations and operational effects are the same. The description will be omitted, and only different points will be described below.
A horizontal smooth peripheral surface 4 a is formed over the entire periphery of the upper surface of the lid 4. Further, a horizontal smooth peripheral top surface 2b similar to that of the third embodiment is formed on the entire upper end of the vertical wall of the container body 2. Accordingly, when the lid 4 is placed on the peripheral top surface 2b of the container main body 2 with the lid 4 facing back, the peripheral top surface 2b and the peripheral surface 4a come into close contact with each other. However, as in the third embodiment, the peripheral top surface 2b and the peripheral surface 4a are not locked, so that the lid body 4 rises or falls according to the internal pressure of the container 5 to bring the internal pressure to atmospheric pressure. The adjustment is performed so that they are approximately equal. That is, the peripheral top surface 2b and the peripheral surface 4a serve as the escape means 22, and the gas inside the container 5 is released to the outside.
In the fourth embodiment, as in the third embodiment, a combination of the peripheral surface 4a and the peripheral top surface 2b is provided as the carbon dioxide escape means 22, and excess carbon dioxide gas is released from the escape means 22 to the outside. It is comprised so that the inside of the container 5 may be sealed with carbon dioxide gas. However, since it is not sealed, there is a weak point that the carbon dioxide concentration cannot be maintained at a high concentration for a long time.

FIG. 5 is a schematic explanatory view of the fifth embodiment in which the apparatus of the first embodiment is used, the article and the control small container are arranged in the container, and powdery dry ice is deposited inside the bag body.
The difference from the first embodiment of FIG. 1 is that the article 7 and the control small container 8 are first arranged in the container body 2 leaving a gap, and then the bag body having a bag mouth 15a in the gap of the container body 2. 15 and the dry ice 10 is put into the bag body 15 through the bag mouth 15a. As dry ice 10, when powdered dry ice is sprayed into the inside of the bag 15 with cryonite or liquefied carbonic acid is sprayed, the powdered dry ice is surely arranged inside the bag 15 without being scattered around. It has the characteristics. That is, by using the bag 15, powdered dry ice can be prevented from being scattered in the container body 2, and the powdered dry ice is in direct contact with the control bed bug 9 in the article 7 or the control small container 8. Therefore, there is no adverse effect on the article 7 and the bed bug 9 for control. Moreover, since powdery dry ice does not contact the wall surface of the container main body 2 directly, it contributes to the durability of the container main body 2. Other configurations and operational effects are the same as in FIG.

FIG. 6 is a schematic explanatory view of a sixth embodiment in which the apparatus of the second embodiment is used, the article and the control small container are arranged in the container, and powdery dry ice is deposited inside the bag body.
The sixth embodiment is different from the second embodiment of FIG. 2 in that the article 7 and the control small container 8 are first placed in the container body 2 leaving a gap, and then the bag is placed in the gap between the container body 2. The bag body 15 having the mouth 15a is put, and the dry ice 10 is put into the bag body 15 through the bag mouth 15a. As described above, when dry ice 10 is sprayed with powdered dry ice into the bag body 15 or liquefied carbonic acid is sprayed with cryonite, the powdered dry ice is reliably scattered without being scattered around. It has the characteristic arranged inside. That is, by using the bag 15, powdered dry ice can be prevented from being scattered in the container body 2, and the powdered dry ice is in direct contact with the control bed bug 9 in the article 7 or the control small container 8. Therefore, the article 7 and the control bed bug 9 are not adversely affected. Moreover, since powdery dry ice does not contact the wall surface of the container main body 2 directly, it contributes to the durability of the container main body 2. Other configurations and operational effects are the same as those in FIG.

FIG. 7 is a schematic explanatory view of a seventh embodiment in which the apparatus of the second embodiment is used, a dry ice block is used in place of powdered dry ice, and the dry ice block still remains in the disinfected state. .
The seventh embodiment is different from the second embodiment of FIG. 2 in that a dry ice block is used as the dry ice 10. Only the different points will be described below, and the description of the same points as in FIG. 2 will be omitted. To do. That is, the dry ice block still remains in the container 5 even after the predetermined time has passed and the bed bug has been killed (7C). When the dry ice block 10 exists inside the container 5, it means that the carbon dioxide gas concentration inside the container 5 is almost 100%. This premise is when the material of the container 5 does not have carbon dioxide permeability. Depending on the material of the container 5, the carbon dioxide gas not only escapes from the gap, but there is a case where the carbon dioxide gas passes through the substance like a light beam. Therefore, in the case of the container 5 made of a material that is impermeable to carbon dioxide, it is theoretically possible to keep the carbon dioxide concentration inside the container 5 at almost 100%. However, this is possible with materials such as steel such as high-pressure gas cylinders. However, since synthetic resin is somewhat carbon dioxide permeable, the carbon dioxide concentration over time There is a gradual decrease.
However, in the seventh embodiment in which the dry ice block remains inside the container 5 even after the removal, the dry ice block continuously sublimates and replenishes carbon dioxide inside the container. There is an effect that the internal carbon dioxide gas concentration is maintained at a high concentration.

FIG. 8 shows that the apparatus and the control small container are arranged in the container using the apparatus of the third embodiment, the dry ice block is put in the bag, and the dry ice block remains even after the removal is completed. It is a schematic explanatory drawing of embodiment.
Similar to FIG. 7, the eighth embodiment is different from the third embodiment of FIG. 3 in that a dry ice block is used as the dry ice 10. Only the different points will be described below and the same as in FIG. 2. Description of this point is omitted. That is, the dry ice block still remains in the bag 15 in the state diagram (8C) in which the bed bug is completely killed after a predetermined time has passed. When the dry ice block 10 exists inside the bag body 15, it means that the carbon dioxide gas concentration inside the container 5 is almost 100%. As in FIG. 7, this premise is that the material of the container 5 is not carbon dioxide permeable. Depending on the material of the container 5, the carbon dioxide gas not only escapes from the gap, but there is a case where the carbon dioxide gas passes through the substance like a light beam. Therefore, in the case of the container 5 made of a material that is impermeable to carbon dioxide, it is theoretically possible to keep the carbon dioxide concentration inside the container 5 at almost 100%. However, this is possible with materials such as steel made of high-pressure gas cylinders, but since synthetic resin has some carbon dioxide permeability, the carbon dioxide concentration gradually decreases over time. Is seen.
However, in the eighth embodiment in which the dry ice block remains in the container 5 even when the removal is completed, the dry ice block continuously sublimates and carbon dioxide is replenished inside the container. There is an effect that the internal carbon dioxide gas concentration is maintained at a high concentration.

[Example 1: Thermostatic bath 22 ° C., excess dry ice powder, killing experiment] In Example 1, the container 5 shown in FIG. 2 of the second embodiment is placed in a thermostatic bath set at 22 ° C. This was an experiment of killing bed bugs. An album was selected as the article 7, and three control bed bugs 9 were arranged in the control small container 8. Excess dry ice powder was placed inside the container 5 as dry ice 10 and set so that all of the dry ice powder sublimated in about 0.5 hours from the start of the experiment well before the completion of the extermination. The carbon dioxide gas sublimated and discharged from the pressure regulating valve 11 is configured to be discharged from the thermostatic bath. Since the constant temperature bath is adjusted to 22 ° C., the internal temperature of the container 5 becomes lower than 22 ° C. due to the presence of dry ice, and also varies during the experiment because it depends on the amount of dry ice present at each time. Further, the carbon dioxide concentration (%) is constantly measured inside the container 5.

  Table 1 shows data on killing experiments of bed bugs in a container filled with CO2 with excess dry ice powder in a thermostat 22 ° C. The state of bed bugs is shown in three stages, ◯ indicates a living state, Δ indicates a knock-down state, that is, a convulsive state, and X indicates a dead state. Six sets of similar test containers were prepared, and three bedworms were put in each, and one test container was opened and examined every processing time. For example, at treatment time 4 (h), three control bed bugs are in a knocked-down state (Δ) on observation, and these are transferred from a 22 ° C. constant temperature bath to a petri dish in a room temperature room, and one day has passed since the transfer. Then, it is shown that all three have been restored to the living state (O). Similarly, at treatment time 12 (h), all three control bed bugs were in observational state (x), and these were transferred from a constant temperature bath at 22 ° C. to a petri dish in a room temperature room and then transferred. It is shown that after one day, all three have been restored to the knockdown state (Δ). Finally, at treatment times 17 (h) and 24 (h), all control bed bugs were observed to be dead (×), and the state after one day of treatment was dead (×). I understand that Therefore, it was found that the bed bug was completely exterminated after the treatment time of 17 hours (h). The dry ice powder remains in the container at the start time 0 (h) and the processing time 0.2 (h), and the dry ice powder disappears in the middle of the processing time 4 (h). doing. Actually, it was confirmed that the dry ice powder was present for about 0.5 hours. That is, until about 0.5 hours (h), the concentration is as high as 94%, and then the concentration gradually decreases, and the carbon dioxide concentration after 17 hours after complete death is 65%. In other words, when the concentration in the initial container is set to approximately 100%, it is necessary to maintain a carbon dioxide concentration of 65% or more for complete annihilation after 17 hours. As a result of Table 1, it was found that at an external temperature of 22 ° C., the removal time was 17 hours and the final concentration was about 65% or more.

[Example 2: Thermostatic bath 30 ° C, excess dry ice powder, killing experiment]
Example 2 is a bed bug killing experiment conducted by placing the container 5 shown in FIG. 2 in a thermostat set to 30 ° C. The only difference from Example 1 is the set temperature of the thermostatic chamber. An album was selected as the article 7, and three control bed bugs 9 were arranged in the control small container 8. Excess dry ice powder was placed inside the container 5 as dry ice 10, and all dry ice powder was sublimated in about 0.5 hours from the start of the experiment well before the completion of the extermination. The carbon dioxide gas sublimated and discharged from the pressure regulating valve 11 is configured to be discharged from the thermostatic bath. Since the constant temperature bath is adjusted to 30 ° C., the inside of the container 5 is also adjusted to 30 ° C. or less. Further, the carbon dioxide concentration (%) is constantly measured inside the container 5.

  Table 2 is a list of bed bug killing experiments in a container in which the thermostat was set to 30 ° C. and CO 2 was filled with excess dry ice powder. The difference from Table 1 is that the killing experiment was conducted with the thermostat set at 30 ° C. By raising the temperature from 22 ° C. to 30 ° C., the carbon dioxide concentration in Table 2 is rapidly reduced compared to Table 1. At the same time, the result is that bedbugs are killed rapidly. The meanings of the symbols O, Δ, and X are the same as those in Table 1, and it can be seen that the bed bug is completely killed after the processing time of 12 (h). Further, the carbon dioxide concentration when completely killed was 63%, that is, about 60%. As a result of Table 2, it was found that in the dry ice powder having a constant temperature of 30 ° C., the removal time was 12 hours and the final concentration was about 60% or more.

[Example 3: Constant temperature bath 22 ° C, excess dry ice block, killing experiment]
Example 3 is a bed bug killing experiment conducted by placing the container 5 shown in FIG. 7 of the seventh embodiment in a thermostat set to 22 ° C. It differs from Example 1 in that a dry ice block was used instead of dry ice powder, and the set temperature of the thermostatic bath was set similarly to 22 ° C. An album was selected as the article 7, and three control bed bugs 9 were arranged in the control small container 8. A feature is that an excessive dry ice block is arranged as dry ice 10 inside the container 5, and the dry ice block gradually sublimates and remains in the container until it is completely killed. The carbon dioxide gas sublimated and discharged from the pressure regulating valve 11 is configured to be discharged from the thermostatic bath. Although the thermostat was adjusted to 22 ° C., the inside of the container 5 was cooled to dry ice and became around 12 ° C. And as dry ice sublimated, it was confirmed that the temperature in the container gradually approaches 22 ° C. Further, the carbon dioxide concentration (%) is constantly measured inside the container 5.

  Table 3 is a list of bed bug killing experiments in a container in which the thermostatic chamber was set to 22 ° C. and CO 2 was filled with an excessive dry ice block. Since the dry ice block has a smaller sublimation rate by a smaller surface area than the dry ice powder, as described above, the high concentration holding time of the carbon dioxide gas becomes longer. The bed bug mortality experiment was started with the time when the carbon dioxide concentration reached 99% as the start time 0 (h). The meanings of the symbols O, Δ, and X are the same as those in Table 1, and it can be seen that the bed bug is completely killed after the processing time of 12 (h). The carbon dioxide gas concentration at 12 hours is 95%, and it is shown that if such a high concentration is maintained, complete killing of bed bugs can be shortened to 12 hours. As a result of Table 3, it was found that in the dry ice block remaining state at a constant temperature bath set temperature of 22 ° C., the removal time was 12 hours and the final concentration was about 90% or more.

[Example 4: Thermostatic bath 30 ° C, excess dry ice block, killing experiment]
Example 4 is a bed bug killing experiment conducted by placing the container 5 shown in FIG. 7 in a thermostat set at 30 ° C. Example 3 was common in that a dry ice block was used, and the set temperature was set to be different from 30 ° C. An album was selected as the article 7, and three control bed bugs 9 were arranged in the control small container 8. A feature is that an excessive dry ice block is arranged as dry ice 10 inside the container 5, and the dry ice block gradually sublimates and remains in the container until it is completely killed. The carbon dioxide gas sublimated and discharged from the pressure regulating valve 11 is configured to be discharged from the thermostatic bath. Although the thermostat was adjusted to 30 ° C., the inside of the container 5 was cooled to about 22 ° C. by being cooled with dry ice. Further, the carbon dioxide concentration (%) is constantly measured inside the container 5.

  Table 4 is a list of bed bug killing experiments in a container in which the thermostat was set to 30 ° C. and CO 2 was filled with an excess of dry ice block. Since Table 3 is common in that a dry ice block is used, the sublimation speed is the same, and therefore it is common in that a high concentration can be maintained for a long time. However, it is different in that the temperature of the thermostatic bath is kept at a high temperature of 30 ° C. Therefore, it means that the complete death time can be shortened. As a result of Table 4, it was found that in the dry ice block having a thermostatic bath set temperature of 30 ° C., the removal time was 10 hours and the final concentration was about 90% or more.

[Examples 1-4: Matomes of Concentration / Death Time in Tables 1 to 4]
As a result of Table 1, it was found that the dry ice powder having a constant temperature set temperature of 22 ° C. has a removal time of 17 hours and a final concentration of about 65% or more. As a result of Table 2, it was found that the dry ice powder having a constant temperature set temperature of 30 ° C. has a removal time of 12 hours and a final concentration of about 60% or more. As a result of Table 3, it was found that in the dry ice block having a thermostatic bath set temperature of 22 ° C., the removal time was 12 hours and the final concentration was about 90% or more. As a result of Table 4, it was found that in the dry ice block having a thermostatic bath set temperature of 30 ° C., the removal time was 10 hours and the final concentration was about 90% or more.
To summarize the above, if the carbon dioxide concentration is kept at a high concentration for a long time, the killing time of bedbugs can be shortened, and the complete killing time is 10 hours or more. As a result, it was found that the bed bugs can be completely killed by retaining 65% or more.

  The present invention is not limited to the above-described embodiments and modifications, and includes various modifications and design changes within the technical scope without departing from the technical idea of the present invention. Needless to say.

  As described above in detail, as a result of intensive studies, the present inventor has been able to bury bed bugs in a carbon dioxide atmosphere and remove them. If bed bugs are buried in an atmosphere of carbon dioxide for 10 hours or more, they can be killed. If the volume concentration of carbon dioxide in the atmosphere is 65% or more in the state of extermination, complete killing is possible. Became clear. In addition, even if the above-mentioned killing time and killed CO2 concentration include some errors, a small control container containing live bed bugs for control is placed in the container, and when the container is filled with carbon dioxide, Carbon dioxide also entered the control small container, and it was confirmed that the bed bug for control had been killed, and the bed bug removal method that can complete the bed bug removal of the article with certainty was established. As a result, a technology that can disinfect bed bugs in articles has been established, and it has become possible to establish and spread the bed bug removal business.

DESCRIPTION OF SYMBOLS 1 Bed bug extermination apparatus 2 Container body 2a Inner bottom surface of container main body 2b Perimeter top surface 3 Opening surface 4 Lid (opening / closing means)
4a peripheral surface 5 container 7 article 8 control small container 9 bed bug for control 10 dry ice 11 pressure regulating valve (an example of escape means)
DESCRIPTION OF SYMBOLS 15 Bag body 15a Bag mouth 20 Sealing means 20a Seal receiving means 20b Seal holding means 22 Escape means

Claims (14)

A method for extermination of bed bugs, which is carried out by burying bed bugs in an atmosphere of carbon dioxide.
The bed bug extermination method according to claim 1, wherein the bed bug is killed by being buried in an atmosphere of carbon dioxide for 10 hours or more.
The bed bug extermination method according to claim 2, wherein the volume concentration of carbon dioxide in the atmosphere is 65% or more in a state where the extermination is completed. The inside of the container contains an article to be rid of bed bugs, the inside of the container is filled with carbon dioxide, the container is sealed, and the article is buried in an atmosphere of carbon dioxide to inhabit the article. A method for extermination of bed bugs, characterized by extinguishing bed bugs.
The bed bug extermination method according to claim 4, wherein the article is buried in the atmosphere of carbon dioxide for 10 hours or more to kill dead bed bugs in the article. The bed bug removal method according to claim 5, wherein the volume concentration of carbon dioxide in the atmosphere is 65% or more when the removal is completed. A control small container containing live control lice is placed in the container, and the carbon dioxide filled in the container also enters the control small container, and the control lice are killed. The bed bug elimination method according to claim 4, 5 or 6, wherein the bed bug elimination of the article is completed after confirmation. When a pressure regulating valve is attached to the container, and the inside of the container is filled with carbon dioxide, the air initially present in the container and / or excess carbon dioxide can be removed only by the pressure difference between the inside and outside of the pressure regulating valve. The bed bug extermination method according to any one of claims 4 to 7, wherein air is evacuated to the outside.
The bed bug according to any one of claims 4 to 8, wherein a bag is placed in the container together with the article and / or the control small container, and the container is sealed by filling the bag with carbon dioxide. Removal method.
The dry ice block is put into the inside of the container, the inside of the container is filled with an atmosphere of carbon dioxide, and the dry ice block is still left even in the state of completion of bed bug removal. The method for extermination of bed bugs described in 1.
A container for containing an article to be rid of bed bugs, a control small container disposed in the container and containing a live bed bug for control, and the article is loaded inside the container In order to do this, the article loading opening opened in the container, the opening / closing means for opening and closing the article loading inlet, and the opening and closing means were closed by filling the container with carbon dioxide from the opened article loading inlet The bed bug extermination device, characterized in that it is composed of escape means for escaping air and / or excess carbon dioxide initially present in the container to the outside. The said container is comprised from the container main body which has an opening surface, and the cover body which closes the said opening surface so that attachment or detachment is possible, and the said opening surface and the said cover body are respectively corresponded to the said goods loading inlet and the said opening-closing means. Bed bug removal device.
The bed bug extermination device according to claim 11 or 12, wherein the pressure regulating valve attached to the container corresponds to the escape means. The evacuation means seals the opening surface by bringing the peripheral surface of the lid into close contact with the peripheral top surface of the container body when the opening surface of the container body is closed by the lid. The peripheral surface floats away from the peripheral top surface when the internal pressure of the container body exceeds the atmospheric pressure, and the peripheral surface closely contacts the peripheral top surface when the internal pressure becomes equal to the atmospheric pressure. The bed bug extermination device according to claim 11 or 12, constituted by: