JPH0679533B2 - Fumigation equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art It is desirable that valuable cultural properties, arts and crafts, etc. be protected safely without being altered for a long period of time, but these cultural properties are subject to various kinds of harm depending on the environment in which they are installed. There is a risk. For example, wooden sculptures such as Buddhist statues and folding screens are used for stag beetles, books and calligraphy for stag beetles, black beetles, or stilts, and wool fabrics for mosquitoes and mosquitoes. There is a possibility of suffering various damages such as contamination, peeling, damage, and collapse.

The fumigation method has been conventionally performed as a measure for preventing such various kinds of damages. This fumigation method differs depending on the fumigant to be fumigated. For example, a closed fumigation method applied to a highly airtight material such as a reinforced concrete structure, or a covered fumigation applied to a large outdoor cultural property. Law, decompression fumigation method applied to small cultural properties. As a general fumigation method, the fumigant is stored in a fumigation cabinet and sealed so as to be in a closed state, and the interior of the cabinet is maintained at a predetermined temperature. Insects, mold killing, egg killing, etc. are performed by filling a fumigant gas such as methyl chloride and fumigating for a predetermined time.

As a fumigating apparatus used in such a fumigation method, a device as shown in FIG. 7 has been conventionally used. This fumigation apparatus 100 is roughly classified into a fumigation cabinet 101,
A heating unit 102 that heats the inside of the fumigation chamber 101 to a predetermined temperature.
And a gas supply unit 103 for supplying fumigation gas, and a stirring unit 104 for stirring the air in the refrigerator.

The fumigation chamber 101 includes an outer wall 105 and an inner wall 1.
The interior space 10 that has a double-walled body 107 composed of No. 06 and the fumigant W to be stored inside the wall 107.
8 is formed, and a heat insulating material 110 for heat retention is provided in a space 109 between the outer wall 105 and the inner wall 106 of the wall body 107,
An opening / closing door 111 is provided on one side wall of the wall body 107, and by closing the opening / closing door 111, the entire structure has a closed structure. In the space 109, a hot water pipe 112 for setting the internal space 108 to a predetermined temperature is provided, and the hot water pipe 112 is a closed circuit, and the control valve 11 is provided in the circuit.
3, the hot water circulation pump 114 and the boiler 115 are provided, and constitute the heating unit 103 as a whole. When the hot water circulation pump 114 and the boiler 115 are operated, hot water at a predetermined temperature flows around the fumigation chamber 101 and the interior space 108
Is heated to a predetermined temperature (generally 10 to 20 ° C.) and maintained. Since the fumigation chamber 101 is generally used in an air-conditioned house such as a museum, a device for cooling the inside is not usually provided. However, a cooling device may be used when there is a possibility that fumigation gas may adversely affect the fumigation of plants or the like.

A discharge port 116 for discharging the fumigation gas is provided in the upper part of the fumigation chamber 101, and the discharge port 116 and the gas vaporizer 117 are connected by a pipe line 118. The gas vaporizer 117 vaporizes a predetermined amount of gas or liquefied gas from the cylinder B, and the gas is mainly methyl bromide, which has an insecticidal effect, and ethylene oxide, which has a sterilizing effect and a fungicidal effect. . When the fumigation gas is injected into the refrigerator by opening the valve 119, the stirring section 104 such as a fan is operated to stir the inside of the refrigerator so that the gas is uniformly applied to the fumigant W.

When the fumigation work is carried out by using the fumigation apparatus 100 as described above, due to the importance of the fumigant W, great care should be taken and it takes time. In the fumigation work, first, after the fumigant W is carefully stored in the refrigerator, the door 111 is closed to make the refrigerator hermetically closed. Next, the boiler of the heating unit 102 is operated to produce hot water, which is circulated around the fumigation cabinet 101 by the hot water circulation pump 114 to bring the interior to a predetermined temperature.

Here, water is used as the heat medium of the heating source because the internal temperature of the refrigerator is 1 even if an abnormal situation occurs.
This is because the temperature does not rise above 00 ° C and the temperature does not change rapidly.

Then, the valve 119 is operated to slowly fill the fumigation chamber 101 with the fumigation gas and to stir the stirring section 10.
The air in the refrigerator is stirred by No. 4. When a predetermined amount of gas has been injected, the valve 119 is operated again to stop the gas injection, and fumigation is performed while the temperature inside the chamber is maintained at the predetermined temperature. The fumigation time and the amount of fumigation gas are carefully set so that the fumigant does not deteriorate. This fumigation time varies depending on the substance to be fumigated, but is about 4 to 5 hours for a small product and several days for a large product. It is preferable that the stirring unit 104 is always operated during the fumigation. The fumigated fumigants W are slaughtered by fungi, insecticides,
Processing such as egg slaughter is applied. When the fumigation is completed, the outside air is introduced from the outside air introduction unit 120 to dilute the gas in the storage,
The gas is released from the gas release unit 121 into the atmosphere. Then, the worker enters the storage and takes out the fumigant W to be fumigated.

[0010]

However, when water is used as the heat medium of the heating source of such a fumigation apparatus, the time required for preheating becomes long and the space in the refrigerator becomes small due to the water piping. , The size of fumigants is limited,
Water leaking from the corroded pipes may leak into the refrigerator and pollute valuable fumigants. In particular, cultural properties may cause physical deterioration due to a rapid temperature rise, but it is difficult to perform fine temperature control when water is used as the heat medium.
There is a problem that it is not easy to prevent the deterioration of cultural properties.

When stirring the air in the fumigation chamber,
If a fan or the like is used for a long period of time, the air and gas flows may be constant in the refrigerator. In this case, if the high-concentration gas strikes the fumigant too much, the fumigant may be damaged.

Further, when the fumigant is removed from the fumigation chamber after fumigation, if fumigating gas remains in the chamber, the gas may harm the worker.

When performing fumigation work for a long time in a closed state, the temperature inside the fumigation chamber may change, but the temperature inside the chamber may also change, but this may deteriorate the fumigants. There is also.

The present invention has been made to solve such a problem, and does not use water as a heating source of a fumigation apparatus, and safely heats a fumigation warehouse without polluting valuable fumigated substances. The fumigation device is designed so that it does not require a special device to stir the air in the refrigerator, the work after the fumigation is safe, and the temperature inside the refrigerator is not affected by changes in the external environment. The purpose is to provide.

[0015]

Means for Solving the Problems The present invention for achieving the above object is to install a fumigation chamber in which fumigants are stored in a fumigation chamber, and heat the interior of the fumigation chamber to a predetermined temperature by a heating unit. In a fumigation apparatus for keeping fumes, fumigating the fumigation gas by filling the interior with fumigation gas and keeping the interior in a closed state for a predetermined time, provided at the top of the fumigation cabinet. An air supply unit adapted to introduce the air in the fumigation chamber to the nozzle provided through the air supply valve, and a fumigation gas in a shower shape from the top of the fumigation chamber so as to flow out from the fumigation chamber. A gas supply part having a gas supply line communicating between a discharge part provided on the top part and a suction side of the blower through a circulation discharge valve, and a gas exhaust port provided so as to face the fumigation chamber. And the blower, and a gas discharge line communicating with the blower via a suction valve, and the blower. And a gas exhaust unit having a gas suction pipe for guiding the discharged gas to the gas adsorption vessel through the exhaust valve,
An air discharge part provided with a ventilation blower in the air discharge pipe line that communicates the fumigation chamber with the outside, and the air supply valve and the circulation discharge valve are opened and sucked when the gas and air are supplied into the storage. It is equipped with an air supply / exhaust button that closes the valve and the exhaust valve, opens the suction valve and the exhaust valve at the time of exhaust, and closes the circulation discharge valve, and controls the heating unit to control a predetermined temperature inside the fumigation chamber. According to the temperature rise of the gas pressure introduced and the temperature control of the heating unit and configured to guide the gas in the cylinder to the gas supply unit via a gas vaporizer. A fumigation apparatus characterized in that the gas adsorption tank and the fumigation chamber are communicated with each other by a pressure regulating pipe having a pressure regulating valve so as to regulate the pressure in the fumigation chamber. The fumigation chamber is internally provided with a sensor for detecting fumigation gas leaked from the fumigation chamber.The sensor is connected to the ventilation blower of the air discharge section, and the ventilation blower is rotated by a signal from the sensor. However, it is preferable to discharge the air in the fumigation chamber to the outside. The heating unit,
A pair of conductors attached to the outer surface of the inner wall of the fumigation chamber and supplied with an electric current, a heat transfer member provided to cover the conductors from the outside, and an insulating member covering the heat transfer member. It is a flat strip-shaped heating element, and it is preferable to dispose the strip-shaped heating elements on at least three side walls of the fumigation chamber.

[0016]

In the fumigation apparatus thus constructed, water is not used as a heating source of the fumigation apparatus and an electric heating element composed of a flat belt-shaped heating element is used. Therefore, rapid preheating can be performed, which is economical. It is excellent in that it can safely keep the fumigation cabinet heated and warm without polluting valuable fumigants, and it is durable because there is no problem of corrosion.

When the air supply unit is operated together with the introduction of the fumigation gas, the air in the fumigation chamber can be sprayed from the nozzle, and the fumigation gas that falls from above the fumigation cabinet like a shower is sprayed from the nozzle. It can be agitated by air, and even if a fan for agitation is not provided in the cabinet, the gas concentration in the cabinet is not biased. Due to air agitation, the gas and air flowing in the cabinet will not have a constant flow. Moreover, since the fumigation is performed while adjusting the pressure inside the chamber while flowing air and gas during the fumigation, the temperature inside the chamber does not rise so much that the fumigant is adversely affected by the temperature rise. In addition, the fumigation can be performed without causing a bad influence on the fumigant W to be fumigated for a long time. Even if a fumigant gas that is ignitable is used, the gas is not ignited because the air is agitated and the explosion-proof property is high.

Further, after the gas concentration in the fumigation chamber or the fumigation chamber is measured by a sensor or a gas concentration measuring unit, ventilation is performed with a blower or the like in case of an abnormality, so the fumigation gas is odorless and colorless. However, the worker can safely perform the fumigation work without being harmed by the fumigation gas.

[0019]

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. The fumigation apparatus 10 shown in FIG. 1 is roughly classified into a fumigation chamber R and a fumigation box 11 for storing a fumigant W to be fumigated therein.
And a heating unit 12 for heating the fumigation chamber 11, and the fumigation chamber 1
1, a gas supply unit 13 for supplying fumigation gas, an air supply unit 14 for supplying air in the fumigation chamber R into the fumigation chamber 11,
Gas exhaust part 15 for exhausting the gas in the fumigation chamber 11 to the outside of the fumigation chamber R, air exhaust part 16 for exhausting the air in the fumigation chamber R to the outside, and gas and air in the fumigation chamber 11. And a control unit C for controlling the state of.

As shown in FIG. 2, the fumigation chamber 11 has a double-structured wall body 22 composed of an outer wall 20 and an inner wall 21, and a space 23 between the outer wall and the inner wall of the wall body 22. A heat insulating material 24 made of glass wool or the like for heat insulation is provided on one side, and an opening / closing door 25 that is airtightly closed by rotating a handle (not shown) is provided on one side wall of the wall body 22.

In the space 23 between the outer wall and the inner wall, there is provided a heating section 12 for keeping the inside of the refrigerator at a predetermined temperature.
As shown in FIG. 3, the heating unit 12 has a flat strip-shaped heating element 26 (which is preferably a product name of ISOTRAC manufactured by Yagami Co., Ltd.) serving as a heating source. A pair of conducting wires 27 that generate heat when an electric current is supplied
And a heat transfer member 28 made of a thin metal plate provided so as to cover the conductor 27 from the outside, and an insulating member 29 made of rubber or the like for covering the heat transfer member 28. As shown in FIG. 4, the strip-shaped heating element 26 is attached and fixed to the outer surface of the inner wall 21 of the fumigation chamber 11 by a tape 30 or the like, and as shown in FIG. The conductor 2 is arranged along the side wall and controls the control unit C.
The fumigation chamber 11 is directly heated from the outer periphery of the side portion by passing an electric current to one end of 7, and the inside of the chamber is heated to a predetermined temperature (generally, 10 to 10).
It is heated to 20 ° C). In addition, since the fumigation chamber is generally used in an air-conditioned house such as a museum, a device for cooling the interior is not usually provided.

Next, referring to FIG. 1, a gas supply unit 13 for supplying fumigation gas into the fumigation chamber 11 circulates between a discharge unit 31 provided at the top of the fumigation chamber 11 and a blower 32. It has a gas supply conduit 34 communicating with the discharge valve 33. In this way, the discharge part 31 is provided at the top of the refrigerator because the fumigating gas is as heavy as 2.82 when the specific gravity of air is 1, and when it falls from above, it moves downward due to its own weight and shower. This is because the effect causes the fumigant W to come down.

However, even if the fumigating gas is dropped from above due to the shower effect, it is not preferable that the fumigant gas having a high concentration directly hits the fumigant W. Therefore, air is supplied above the fumigating cabinet 11. A section 14 is provided. Air supply unit 14
Is for spraying the air in the fumigation chamber R introduced through the filter 35 equipped with a fan and the air supply valve 36 from the nozzle 37, and the air sprayed from the nozzle 37 is used for fumigation in the refrigerator. I try to stir the gas. Nozzle 37
If the fumigation gas in the refrigerator is agitated by the air sprayed from the chamber, the gas concentration in the cabinet will not be biased even if a fan for agitation or the like is not provided in the cabinet. Moreover, if the gas is agitated with air, the gas and air flowing in the chamber do not form a constant flow, and even if fumigation is performed for a long time, the fumigant W is not adversely affected.

The gas exhaust unit 15 has a gas exhaust line 40 which connects the gas exhaust port 38 at the top of the fumigation chamber and the blower 32 through a suction valve 39. The gas discharge conduit 40 and the gas supply conduit 34 are configured to circulate and supply gas by one blower 32. Therefore, the gas from the cylinder B may be introduced into either the gas discharge pipeline 40 or the gas supply pipeline 34, but in the present embodiment, the gas is introduced into the gas discharge pipeline 40. A plurality of the cylinders B are provided. Each of the cylinders B contains a colorless and odorless fumigant gas mainly composed of methyl bromide which exerts an insecticidal effect and ethylene oxide which mainly exerts a bactericidal effect and a fungicidal effect. It is stored. This fumigating gas is supplied from the cylinder B to the control valve 4 by operating a gas vaporizer 41 having a heating member on the outer circumference or bottom.
2 is controlled and drawn by the blower 32, drawn by the blower 32, and introduced into the gas supply line 34. The gas flow from the cylinder B can be confirmed by the dispenser D.

On the other hand, the fumigation gas discharged by the gas exhaust unit 15 passes through the gas discharge conduit 40 by the blower 32, and is guided to the gas adsorption tank 44 by the gas adsorption conduit 43 via the blower 32. An exhaust valve 45 is provided in the gas adsorption conduit 43 to control whether or not gas can be discharged. A partition plate 46 is provided inside the gas adsorption tank 44 so that it cannot flow into the outlet side unless it passes through a gas adsorption member 47 made of activated carbon or the like. A discharge pipe 48 communicates with the outlet side, and the discharge pipe 48
Is communicated with the air discharge conduit 50 of the air discharge portion 16 via a pressure regulating valve 49 that functions as a check valve.

Even if the fumigant gas is discharged to the outside by the gas supply unit 13, residual gas may still exist in the fumigation chamber R. In such a case, the operator immediately fumigates. It is not preferable to enter the room R. Therefore, since the air in the fumigation chamber R needs to be discharged to the outside in some cases, the air discharge unit 16 is provided. This air discharge part 16 is provided with an air intake port 51 in the fumigation chamber R,
The air intake port 51 is connected to the suction side of the ventilation blower 52, and the air discharge conduit 50 is connected to the discharge side of the ventilation blower 52. Most of the air exhausted by the ventilation blower 52 of the air exhaust unit 16 is air, and even if fumigant gas is contained, the amount is very small. Therefore, the outlet end of the gas exhaust pipe 48 is exhausted by air. The gas is not adsorbed in the gas adsorption tank 44 and is diluted with air so as to be discharged to the outside by being connected to the pipe line 50. However, the gas and air exhausted from the air exhaust conduit 50 to the outside may have a concentration that is not desirable to be exhausted in some cases, so in order to prevent such a situation, the air exhaust conduit is A part of the air flowing through 50 is guided to the sensor 54b by the conduit 60, and the sensor 54b
By b, the concentration of gas contained in the exhausted air is sensed, and when a gas having a predetermined concentration or more is flowing through the air exhaust pipe line 50, the ventilation blower 52 is stopped. Then, when the air supply button is pressed at the time of air supply for supplying gas and air to the interior, the air supply valve 36 and the circulation discharge valve 33 are opened, and when the exhaust button is pressed at the time of exhaust, the circulation discharge valve 33 is closed. The suction valve 39 and the exhaust valve 45 are opened. This air supply / exhaust button is provided in the control section C, but is not shown. The control section C also has a section for controlling the heating section 12 and controlling the temperature in the fumigation chamber 11.

The gas concentration measuring unit 53 comprises a high concentration region gas concentration measuring unit 53h and a low concentration region gas concentration measuring unit 53l, and the high concentration region gas concentration measuring unit 53h is a gas concentration state in the fumigation chamber. The low concentration range gas concentration measuring unit 53l is used to determine whether the gas concentration in the fumigation chamber can be entered by the worker to take out the fumigant. Each measuring unit 53 has one or a plurality of sensor units, the tip of which faces the fumigation chamber 11, and, for example,
The gas is analyzed by a non-dispersive infrared analysis method and the value is recorded so that it can be visually observed from the outside. However, if it is determined whether or not the worker can enter the room based only on the results recorded by the recording unit of the gas concentration measuring unit 53,
There is a case where the safety when an operator enters the refrigerator is not completely ensured, and therefore it is necessary to detect the gas concentration in the refrigerator.

Therefore, in this embodiment, the control section C is
The signal from the sensor 54a for detecting gas leakage in the fumigation chamber R is input to the air conditioning chamber, and when the signal from the sensor 54a is input, the ventilation blower 52 is rotated and the air in the fumigation chamber R is rotated. Are discharged to the outside.

Further, a signal from a sensor 54b for detecting the gas concentration of a mixed gas of air and gas discharged from the fumigation chamber R is also input to the control section C. When the signal from the sensor 54b is input,
The rotation of the ventilation blower 52 is stopped or the exhaust valve 45
Is closed so that air in the fumigation chamber R or the like is not discharged to the outside. In addition, it is preferable that a gas leak alarm or the like is activated when the sensor 54 detects a concentration higher than a predetermined value.

However, when the fumigation gas is fed into the refrigerator, the pressure in the refrigerator rises. If the fumigation is carried out while maintaining the increased pressure state, the inside of the refrigerator may have high temperature and high pressure. Therefore, in this embodiment, in order to keep the pressure inside the fumigation chamber at a desired pressure state at all times, the pressure regulation conduit 56 having the pressure regulation valve 55 is provided between the fumigation chamber 11 and the gas adsorption tank 44. Communication is performed so that the pressure state inside the fumigation chamber 11 is adjusted.

Next, the operation of the embodiment will be described.

When performing fumigation using this fumigation apparatus, due attention is paid to the importance of fumigants, meticulous attention should be paid to the fumigation work taking a long time. In performing the fumigation work, first, the fumigant W is carefully stored in the storage, and then the opening / closing door 25 is closed to make the storage hermetically closed. Next, the strip-shaped heating element 26 of the heating unit 12 is operated to bring the inside of the refrigerator to a predetermined temperature. The time required for this heating is short because water is not used, and the preheating time is also short. Then, when the air supply button is pressed while the internal temperature is maintained at a predetermined temperature, the air supply valve 36 and the circulation discharge valve 33 are opened, and the suction valve 39 and the exhaust valve 45 are closed. Then, if the control valve 42 is operated, the fumigating gas is transferred from the cylinder B to the gas vaporizer 41.
Move to. When the blower 32 is operated in this state, the fumigation gas is introduced into the fumigation chamber 11 through the gas supply pipe line 34. A filter 35 having a fan of the air supply unit 14 at the same time as or earlier than the introduction of the fumigation gas.
Is operated, the air in the fumigation chamber R is sprayed from the nozzle 37. The air to be sprayed is agitated with the fumigating gas that falls like a shower from above. Therefore, the fumigating gas does not hit the fumigant W, and the gas concentration in the refrigerator does not deviate even if a fan or the like for stirring is not provided in the refrigerator. Further, if the gas is agitated with air, the gas and air flowing in the chamber do not form a constant flow, and even if fumigation is performed for a long time, the fumigant W is not adversely affected. The gas concentration is the high concentration range gas concentration measuring unit 53.
Since it is detected by h and displayed on the external recording unit, it is possible to check the gas condition in the refrigerator.
When the gas and the air are excessively introduced, the pressure inside the chamber is adjusted by the action of the pressure regulating valve 55.

Then, the fumigation is performed for a predetermined time while keeping the temperature inside the storage at a predetermined temperature.

FIG. 6 shows the experimental results of measuring the temperature inside the chamber during the fumigation. This experiment was carried out using a fumigation chamber with an internal volume of 8 m ³ , the gas velocity in the chamber was 0.2 m / sec, the set temperature was 17 ° C, and two days and nights in Chiba prefecture from November 16th to 18th. It was The experimental result shows that the outside temperature is indicated by a broken line (Fig. 6).
A), the humidity of the outside air is indicated by a one-dot chain line (FIG. 6B), the temperature inside the refrigerator is indicated by a solid line (FIG. 6C), and the humidity inside the refrigerator is indicated by a two-dot chain line (FIG. 6D). As is clear from the results of this experiment, it was found that the temperature inside the chamber maintained a substantially constant 17 ° C for a long period of time.
It was found that the pressure inside the fumigation chamber 11 was regulated by the pressure regulating valve 55 and the temperature was reliably maintained at the predetermined temperature.

When the fumigant is taken out after the fumigation is slowly performed for a predetermined time in this way, first, the exhaust button is pressed to close the circulation discharge valve 33, and the suction valve 39 and the exhaust valve. Open 45. Then, the air supply unit 14 is operated to operate the blower 32 while introducing air into the storage, and the ventilation blower 52 is operated while discharging the fumigation gas in the storage to dilute the exhaust gas. The low-concentration region gas concentration measuring unit 53l indicates that the gas concentration is below a predetermined level,
Exhaust is performed until a and 54b also show no abnormality. Then, after confirming that neither the low concentration gas concentration measuring unit 53l nor the sensors 54a and 54b show any abnormality,
Enter the fumigation room R and take out the fumigant W in the storage. In this case, when the sensors 54a and 54b detect an abnormality, the ventilation blower 52 of the air discharger 16 is operated to discharge the air and gas in the fumigation chamber R to the outside again.

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, in the above embodiment, the art and crafts are fumigated,
In addition to this, the present invention can be applied to any one that can be sterilized by fumigation or can be sterilized. Further, the heating unit has the flat band-shaped heating elements arranged on the three side walls of the fumigation chamber, but it may be provided not only on the side walls but also on the opening / closing door.

[0037]

As described above, the fumigating apparatus of the present invention does not use water as a heating source of the fumigating apparatus, can preheat quickly, is excellent in economy, and is a valuable fumigant. It is possible to safely heat and keep heat in the fumigation cabinet without polluting the steamed matter, and there is no problem of corrosion, so that it becomes durable. In addition, the fumigation gas can be easily agitated, and even if a fan for agitation is not provided in the cabinet, the gas concentration in the cabinet is not biased, and fumigation for a long time has a bad effect on the fumigants. Nonetheless, even if a fumigant gas that is ignitable is used, it is highly explosive-proof because it stirs air. Further, 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.

[Brief description of drawings]

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

FIG. 2 is a schematic sectional view of the fumigation chamber of the same embodiment,

FIG. 3 is a perspective view of a belt-shaped heating element,

FIG. 4 is a sectional view showing a mounting state of the band-shaped heating element,

FIG. 5 is a schematic perspective view showing an arrangement of band-shaped heating elements,

FIG. 6 is a graph showing experimental results of one embodiment of the present invention,

FIG. 7 is a schematic cross-sectional view showing a conventional fumigation chamber.

[Explanation of symbols]

11 ... Fumigation chamber, 12 ... Heating part, 13 ... Gas supply part, 14
... Air supply unit, 15 ... Gas exhaust unit, 16 ... Air exhaust unit,
21 ... Inner wall of fumigation chamber, 26 ... Strip-shaped heating element, 27 ... Conductor,
28 ... Heat transfer member, 29 ... Insulating member, 31 ... Discharge part, 32
... Blower, 33 ... Circulation discharge valve, 34 ... Gas supply line, 3
6 ... Air supply valve, 37 ... Nozzle, 38 ... Gas exhaust port, 39 ...
Suction valve, 40 ... Gas discharge line, 41 ... Gas vaporizer, 43
… Gas adsorption line, 44… Gas adsorption tank, 45… Exhaust valve, 5
0 ... Air discharge conduit, 52 ... Ventilation blower, 53 ... Gas concentration measuring unit, 54 ... Sensor, 55 ... Pressure regulating valve, 56 ... Pressure regulating conduit, B ... Cylinder, C ... Control unit, R ... Fumigation chamber, W ... fumigants.

Claims (3)

[Claims] 1. A fumigation chamber (11) containing a fumigant (W) is installed in the fumigation chamber (R), and the fumigation chamber (11) has a heating section (12).
In the fumigation apparatus, which is adapted to perform fumigation of the fumigant (W) by keeping the temperature at a predetermined temperature by filling the interior with a fumigant gas and maintaining the interior in a closed state for a predetermined time. The fumigation chamber is installed in the nozzle (37) provided at the top of the fumigation chamber (11).
An air supply part (14) adapted to introduce the air in the (R) through an air supply valve (36), and to let the fumigation gas flow out like a shower from the top of the fumigation chamber (11). At the top of the fumigation chamber (11), the discharge part (3
A gas supply section (13) having a gas supply line (34) communicating between the suction side of the blower (32) and the blower (32) via a circulation discharge valve (33).
And a gas exhaust port (38) provided so as to face the fumigation chamber (11)
And the blower (32) are communicated with each other through a suction valve (39), and a gas exhaust pipe (40), and gas discharged from the blower (32) is adsorbed through an exhaust valve (45). A gas exhaust part (15) having a gas adsorption conduit (43) leading to the tank (44) and an air exhaust conduit (50) communicating the inside of the fumigation chamber (R) with the outside.
An air discharge part (16) provided with a ventilation blower (52) on the inside and the air supply valve (36) at the time of air supply for supplying gas and air into the storage
And the circulation discharge valve (33) are opened, the suction valve (39) and the exhaust valve (45) are closed, and the suction valve (39) and the exhaust valve (4
Air supply that opens 5) and closes the circulation discharge valve (33)
A control unit (C) having an exhaust button and adapted to control the heating unit (12) to control a predetermined temperature in the fumigation chamber (11)
And a gas vaporizer for gas in the cylinder (B) to the gas supply unit (13).
(41) is configured to be guided through and the gas adsorption tank so as to adjust the pressure in the fumigation chamber (11) in accordance with the introduced gas pressure and the temperature rise due to temperature control of the heating unit (12) (44)
A pressure regulating line (56) having a pressure regulating valve (55) between the fumigation chamber (11) and
Fumigation device characterized by being communicated with each other. 2. The fumigation chamber (R) is internally provided with a sensor (54) for detecting fumigation gas leaked from the fumigation chamber (11), and the sensor (54) and the air discharge part. The ventilation blower (52) of (16) was connected, and the ventilation blower (52) was rotated by the signal from the sensor (54) to discharge the air in the fumigation chamber (R) to the outside. The fumigation apparatus according to claim 1, which is characterized in that. 3. The pair of conducting wires, to which the heating part (12) is attached to the outer surface of the inner wall (21) of the fumigation chamber (11) and which is supplied with an electric current.
(27), a heat transfer member (28) provided so as to cover the conducting wire (27) from the outside, and an insulating member covering the heat transfer member (28)
2. A flat strip heating element (26) consisting of (29), wherein the strip heating element (26) is arranged on at least three side walls of the fumigation chamber (11). The fumigation apparatus according to 2.