JPH05236857A - Fumigation and equipment therefor - Google Patents

Abstract

PURPOSE:To carry out the subject fumigation-work in a state where the inside of a fumigator is kept at the ordinary pressure by expanding air bags in the fumigator and letting the air out of the air bags accompanying introduction of a fumigation gas. CONSTITUTION:Air bags 12 in a fumigator 11 are once expanded and the air is allowed to come out of the air bags while introducing a fumigation gas 25. The fumigation volume can be reduced and, therefore, the amount of chemicals can be reduced. Thereby, a fumigation work can safely be carried out while keeping the inside of the fumigator at the ordinary pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fumigation method and apparatus for preventing cultural assets, arts and crafts, etc. from being damaged by molds and insects.

[0002]

[Prior Art] It is desirable that valuable cultural properties and arts and crafts be safely protected without deterioration over a long period of time, but cultural properties are not only affected by aging but also by the environment in which they are installed. There is a risk of various harm. That is,
Depending on the environment in which the cultural property is installed, pests and molds may be generated, which may damage the cultural property.
Therefore, as a measure to prevent such damage, traditionally, cultural assets are fumigated using fumigation gas.

[0003] A general fumigation method is to use a fumigant body consisting of a cultural property storage, a museum, a museum, a library, a warehouse, etc., to seal the fumigated body, and to maintain a predetermined temperature inside the fumigated body to oxidize it with strong toxicity. A fumigant gas composed of ethylene and methyl bromide is charged and fumigated for a predetermined time to kill insects, molds and eggs.

For example, in a fumigation-only warehouse, the skeleton is strongly constructed of concrete or steel plate so that high airtightness can be obtained, and a strong airtight door is provided at the entrance / exit. For this reason,
The fumigation work is relatively simple, and the fumigation gas may be introduced into the warehouse. Fumigation of cultural properties is usually done by sealing the building, such as a museum or museum, with adhesive tape, or if the cultural property is a building, cover it with an airtight material such as a vinyl sheet and put it inside. Fumigation is performed by introducing fumigation gas. Furthermore, the cultural property storage is used to store and store a large number of cultural properties, and the inside is partitioned by partition walls, but since it is not highly airtight, it is necessary to use the air conditioner's air to perform fumigation. This is done by filling the fumigation gas after closing and sealing the entrance and exit.

As described above, in fumigation, a liquid drug is generally gasified by a vaporizer and then discharged into each body to be fumigated by a fan or the like. In this case, the amount of drug, the increased gas volume and the fumigation time are as follows. As shown in the table below.

[0006]

[Table 1]

If the amount of medicine shown in this table is used, the internal pressure in a museum is 300 mmAq, 120 mmAq in a special fumigation room for fruits and vegetables, and 80 mmAq in a special fumigation room for wood.
Will increase.

[0008]

However, it is almost impossible to maintain such a high internal pressure until the completion of fumigation after administration of medication, and it is almost impossible to use the existing equipment. There was a possibility that it could leak into the room and cause an accident of poisoning with a colorless fumigant that is tasteless and odorless.

Further, there is a possibility that a portion to be pasted may be damaged or the connection hose may be detached due to a rapid increase in pressure. Therefore, the dedicated fumigation chamber may have a pressure resistant structure so as to be able to withstand the pressure. With such a structure, the fumigation box itself becomes expensive, and there is a problem that equipment costs are required.

Further, fumigated bodies such as museums in which fumigated products such as the above-mentioned works of art are stored often have high ceilings, and fumigating them throughout the whole building wastes chemicals. However, in addition to the extremely low fumigation efficiency, there is a high possibility of causing an accident of poisoning, but the fact is that such a method for efficiently fumigating a fumigated body has not been proposed yet.

The present invention has been made in order to solve such a problem, and can efficiently fumigate even a fumigating body having a useless space, and there is no possibility that the fumigant leaks from the fumigating body. It is an object of the present invention to provide a fumigation device that can perform the food safely and reliably.

[0012]

Means for Solving the Problems The present invention for achieving the above-mentioned object is to fumigate a fumigant by introducing a fumigant gas into the fumigant body after the fumigant body containing the fumigant is pasted with substantially no gaps. In the fumigation method of performing, after temporarily expanding the air bag by introducing air from the outside of the fumigation body into the air bag provided in the space of the fumigation body, while introducing the fumigation gas into the fumigation body, A fumigation method is characterized in that air is removed from an air bag, and fumigation is performed while maintaining the inside of the fumigation body at atmospheric pressure.

According to the present invention for achieving the above object, the air outside the fumigant body is passed through an air supply valve by a fan in an air bag provided so as to reduce a substantial fumigant volume in the fumigant body. The air supply unit adapted to be introduced by means of an air supply unit, an air discharge unit for discharging the air in the air bag to the outside through a discharge valve, and a fumigation system in which the fumigation volume is substantially reduced by expanding the air bag. A gas supply pipe for introducing a fumigant gas into the body, and a gas supply unit having an outlet with a stirring fan for uniformly dispersing the supplied fumigant gas in the fumigant body, and the fumigant supplied to the fumigant body from this gas supply unit. A pressure detection member for detecting a pressure increase in the fumigation body due to the gas for use and a signal from the pressure detection member to discharge the air in the air bag to the outside from the air discharge portion to bring the inside of the fumigation body to a predetermined pressure. A fumigation device having a control unit and a gas exhaust unit that introduces external air through a filter attached to a supply port after fumigation and discharges fumigation gas inside the fumigation body to the outside. .

In the gas exhaust unit, it is preferable to provide a gas adsorption tank on the gas exhaust pipe for exhausting fumigation gas to the outside, and install a filter at the air supply port to prevent invasion of flying pests and mold. Is preferred.

[0015]

The fumigation apparatus thus constructed can reduce the substantial fumigation volume by introducing air into the air bag, which can reduce the amount of chemicals used, thereby improving the fumigation efficiency. Can be improved. Also, since the fumigation gas is filled while keeping the fumigation body at normal pressure while evacuating the air in the air bag, the fumigation body is fumigated under normal pressure, and the fumigation gas does not leak outside. Even if the fumigation gas is tasteless, odorless, and colorless, the fumigation gas is not damaged and the worker can safely perform the fumigation work.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention. A fumigation method when applied to a fumigation body having a large surplus space such as an art museum will be described with reference to FIG.
In this fumigation method, first, an air bag 12 is installed in the space of the fumigation body 11 such as the museum in which the fumigation product W is stored, and air is introduced into the air bag 12 from the outside of the fumigation body 11. The fumigant body 11 is expanded to reduce the substantial fumigant volume in the fumigant body 11. Next, the fumigated body 11 is pasted without gaps using an adhesive tape or the like. This stitching is for the purpose of making work safety more complete.

Then, introduction of a predetermined fumigant gas as shown in Table 1 into the fumigant body 11 is started. The internal pressure of the fumigant body 11 gradually increases with the introduction of the fumigating gas, but the control unit C is operated so that the internal pressure does not rise above a predetermined value, and the air bag 1
The air in 2 is gradually discharged to the outside, and the internal pressure of the fumigation body 11 is adjusted to be approximately normal pressure. This makes fumigation 1
The internal pressure of 1 does not rise unnecessarily, and gas leakage due to the increase in internal pressure is prevented. When the internal pressure of the fumigation body 11 becomes approximately normal pressure, the release of air from the air bag 12 is stopped. After the fumigation body 11 is filled with the gas in this way, fumigation is performed for a predetermined time. When the pressure inside the fumigation body 11 rises due to a temperature rise or the like, the air inside the air bag 12 is gradually released again to the inside so that the internal pressure of the fumigation body 11 is adjusted to about normal pressure.

When the fumigation is completed, external fresh air is introduced into the fumigation body 11 to dilute the internal gas and then the gas is discharged, but the initial exhaust gas concentration at the time of this exhaust is lowered. Therefore, highly safe exhaust can be performed.

A fumigation apparatus 10 for specifically implementing this method
As shown in FIG. 1, the air bag 1 is roughly classified.
An air supply unit 13 for introducing air outside the fumigating body 11 into the inside 2
An air discharge part 20 for discharging the air in the air bag 12 to the outside, a gas supply part 25 for introducing a fumigation gas into the fumigation body 11, and a pressure detection member 30 for detecting the pressure in the fumigation body 11. And a control unit C for controlling the air in the air bag 12 to be discharged to the outside by a signal from the pressure detection member 30, and a gas exhaust unit 35 for discharging the fumigating gas in the fumigating body 11 to the outside. Is becoming

The air supply unit 13 has four air bags 12 provided so as to reduce a substantial fumigation volume in the fumigation body 11, and an air introduction pipe 14a is connected to the air bags 12. The air introduction pipe 14a is connected to the discharge side of the fan 16 via the air introduction valve 15 by the air introduction pipe 14b. An air introduction pipe 14c having an air supply valve 17 is connected to the suction side of the fan 16.

In the figure, "N" is a nozzle.

FIG. 2 is a schematic sectional view showing the air bag 12. As shown in FIG. 2, the air bag 12 is made of rubber or a thin film synthetic resin in a central tube 18 which is in communication with the air introducing tube 14a. The bag body 12a is attached by a rubber band 19 or the like. A lower end of the central tube 18 is closed, and a large number of small holes O are formed in a portion covered by the air bag 12.

The air discharge section 20 has the air introducing pipe 1
It has an air discharge pipe 21a branched from 4a, and this air discharge pipe 21a is connected to the suction side of the fan 16 via a shutoff valve 22. Further, a nozzle N is connected via an exhaust valve 23 to an air exhaust pipe 21b which is branched and connected from the air introduction pipe 14b connected to the discharge side of the fan 16.

The gas supply unit 25 has a cylinder 26 in which a predetermined chemical is stored, and the cylinder 26 is connected to a gas vaporizer 28 via a gas supply pipe 27 for supplying fumigation gas to vaporize the gas. Gas supply pipe 27 extended from the container 28
Is connected to a blow-out port 39 with a stirring fan provided in the fumigant body 11. The blow-out port 39 with a stirring fan has a gas supply pipe connected to the top of a stirring fan installed so as to blow upward, and the fumigant gas is diluted with the air in the fumigating body 11 and the fumigating gas is blown from the blow-out port O. 1
It is designed to discharge into the inside of 1.

The control section C calculates the pressure detecting member 30 for detecting the pressure in the fumigant 11 and the signal from the pressure detecting member 30, and operates the shutoff valve 22 provided in the air discharge pipe 21a. Control member 3 for outputting a release signal to the part 31
2, the shutoff valve 22 and the discharge valve 23 are opened and the fan 16 is opened when the pressure in the fumigant body 11 reaches a predetermined value.
Is operated to discharge the air in the air bag 12 to the outside.

The gas exhaust unit 35 is provided on the side of the fumigating body 11 and discharges the fumigating gas to the outside.
6 and an air supply port 37 for introducing fresh air from the outside
And have. A gas adsorption tank (not shown) may be provided in the gas discharge pipe 36 to take in fumigation gas discharged to the outside.

In the figure, reference numeral "40" is a gas concentration measuring device, which is adapted to detect the gas concentration in the fumigation body 11 from three points. Further, reference numeral “41” is a pressure temperature recorder.

Next, the operation of the embodiment will be described.

When fumigation is performed using this fumigation apparatus 10, due to the importance of the fumigation product W, great care must be taken and the fumigation work is carefully performed over a long period of time. In the fumigation work, first, the air bag 12 is installed in the space of the fumigant body 11 in which the fumigant W is stored, and the outside air of the fumigant body 11 is introduced into the air bag 12 by operating the air supply unit. By operating the fan 16, the external air is changed from the nozzle N to the air introducing pipe 14c to the fan 16 to the air introducing pipe 1.
4b → It is guided into the air bag 12 through the air introduction valve 15. As a result, the airbag 12 is inflated and the substantial fumigation volume of the fumigant body 11 is reduced. Next, the fumigated body 11 is glued with an adhesive tape or the like without gaps.

Then, the air supply valve 17 and the air introduction valve 15
Is closed and a predetermined fumigating gas is put into the fumigating body 11.
When the control valve of the cylinder 26 is operated, the chemical liquid in the cylinder 26 moves to the gas vaporizer 28 through the gas supply pipe 27, is vaporized, and is introduced into the fumigant body 11 through the gas supply pipe 27. The fumigating gas is discharged into the fumigating body 11 through a blow-out port O with a stirring fan provided at the tip of the gas supply pipe 27.

The fumigation body 11 accompanying the introduction of this fumigation gas
Internal pressure gradually increases. This internal pressure is the pressure detection member 3
The signal from the pressure detection member 30 is calculated by the control member 32, and is output to the operation unit 31 of the shutoff valve 22 provided in the air discharge pipe 21a. That is, when the pressure inside the fumigant body 11 reaches the normal pressure or higher, the control member 32 outputs a signal for opening the shutoff valve 22 and the discharge valve 23, operates the fan 16, and operates the airbag 1
A part of the air in 2 is discharged to the outside. Therefore, the inside of the fumigant body 11 is always kept at normal pressure, the internal pressure of the fumigant body 11 does not rise unnecessarily, and gas leakage due to the rise of the internal pressure is prevented. When the internal pressure of the fumigation body 11 becomes approximately normal pressure, the release of air from the air bag 12 is stopped.

When the fumigating body 11 is filled with the gas in this way, the fumigation for a predetermined time is started. The fumigated body 11
The internal temperature is generally about 10 to 20 ° C,
When the pressure inside the fumigant body 11 rises due to the rise in the outside temperature,
Once again, the air in the air bag 12 is gradually released to the outside,
The internal pressure of the fumigation body 11 is adjusted to be approximately normal pressure.
In this way, when the fumigation product W is taken out after the fumigation is slowly performed for a predetermined time, first, the air in the air bag 12 is gradually released to the outside to reduce the pressure state in the fumigation body 11. Use pressure. As a result, fresh air is introduced from the outside through the filter 38 through the air supply port 37, and the gas concentration in the fumigant body 11 is reduced. Then, the diluted fumigation gas is discharged to the outside through the gas discharge pipe 36. If the gas discharge pipe 36 is provided with a gas adsorption tank, the fumigation gas discharged to the outside can be taken in and the deterioration of the environment can be prevented.

The above description is one embodiment of the present invention, and the present invention can be variously modified without departing from the scope of the claims. For example, as shown in FIG. 3, the air bag 12A includes a casing 4
You may store it in 2. In this way, the size of the airbag 12A when inflated is specified, and the airbag 12A can be always installed and used in the fumigating body 11 having a predetermined volume.
FIG. 4 is a schematic explanatory view showing this always installed dedicated fumigation apparatus, and the same members as those shown in FIG. 1 are designated by the same reference numerals. As described above, the special fumigation apparatus in which the air bag 12A is housed in the casing 42 is functionally the same as the previous fumigation apparatus, and therefore detailed description thereof will be omitted. Since it is possible to perform fumigation under normal pressure, as a result, not only can the fumigation capacity be substantially reduced to reduce the amount of chemicals, but the internal pressure does not rise unnecessarily, so The pressure resistance design value can be lowered, and the airtight door can be reduced in weight and the construction cost can be reduced.

[0034]

As described above, the fumigating apparatus of the present invention is capable of efficiently fumigating a fumigant having a large surplus space, and there is no possibility that the fumigant leaks from the fumigant without completely sealing it. The fumigation work can be performed safely and surely. Also, the cost of building the fumigated body can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention,

FIG. 2 is a schematic cross-sectional view of the airbag of the same embodiment,

FIG. 3 is a schematic sectional view showing another embodiment of the airbag.

FIG. 4 is a schematic sectional view showing another embodiment of the present invention.

[Explanation of symbols]

11 ... Fumigation body, 12 ... Air bag, 13 ... Air supply part, 16 ... Fan, 17 ... Air supply valve, 20 ... Air discharge part, 25 ... Gas supply part, 27 ... Gas supply pipe, 30 ... Pressure detection member, 35 ... Gas exhaust part, 36 ... Gas exhaust pipe, 37 ... Air supply port, 39 ... Stirring fan, C ... Control part, W ... Fumigation product.

Claims (3)

[Claims] 1. The fumigation body (11) in which the fumigation product (W) is stored is adhered to the fumigation body (11) with substantially no space, and then fumigation gas is introduced into the fumigation body (11) to fumigate the fumigation product (W). In the fumigation method to be performed,
Air bag (12) provided in the space of the fumigation body (11)
After inflating the air bag (12) by introducing air from the outside of the fumigant body (11), air is introduced from the air bag (12) while introducing fumigation gas into the fumigant body (11). A fumigation method, characterized in that the fumigation is carried out in a state where the inside of the fumigation body (11) is pulled out and kept at normal pressure. 2. A fan (16) supplies air outside the fumigant body (11) into an air bag (12) provided to reduce a substantial fumigant volume in the fumigant body (11). An air supply part (13) adapted to be introduced through an air valve (17), an air discharge part (20) for discharging the air in the air bag (12) to the outside through a discharge valve, and the air A gas supply pipe (27) for introducing a fumigant gas into the fumigant body (11) whose fumigant volume is substantially reduced by inflating the bag (12), and the fumigant gas supplied (1)
1) A gas supply section (25) equipped with a blow-out port (39) with a stirring fan that disperses uniformly in the inside, and fumigation using fumigation gas supplied from this gas supply section (25) into the fumigating body (11). A pressure detection member (30) for detecting a pressure increase in the body (11) and a signal from the pressure detection member (30) discharge the air in the air bag (11) from the air discharge part (20) to the outside. Control unit for controlling the inside of the fumigation body (11) to a predetermined pressure
(C) and a filter (3) with external air attached to the supply port (37) after fumigation.
A fumigation apparatus having a gas exhaust part (35) for introducing the fumigant gas in the fumigant body (11) diluted with the air to the outside and introducing the fumigant gas to the outside. 3. The fumigation apparatus according to claim 2, wherein the gas exhaust part (35) has a gas adsorption tank in a gas exhaust pipe (36) for exhausting fumigation gas to the outside.