JP2001212431A - Formaldehyde cracking device, air conditioner having catalyst for cracking of formaldehyde, fumigation system having formaldehyde generating device and cracking device, and formaldehyde generating and cracking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a formaldehyde generating and cracking device which is capable of generating gaseous formaldehyde and executing the cracking treatment of the formaldehyde without heating gas to be treated or catalyst. SOLUTION: A prescribed formaldehyde generating device and a formaldehyde cracking device having the catalyst for cracking the formaldehyde are made into a unit and this unit is made easily movable into a room for treatment. A first shutter route passing the formaldehyde generating device and a second shutter route passing the formaldehyde cracking device are disposed. To carry out a fumigation treatment, a user opens the first shutter route and closes the second shutter route to generate the formaldehyde. To carry out a formaldehyde cracking device treatment, the user closes the first shutter route and opens the second shutter route to circulate the gas to be treated at ordinary temperature without heating the gas to be treated or the catalyst.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various techniques relating to the decomposition treatment of formaldehyde used in fumigation treatment, and more particularly to a formaldehyde decomposition apparatus, an air conditioner equipped with a formaldehyde decomposition catalyst, a formaldehyde generation apparatus and a special purpose. TECHNICAL FIELD The present invention relates to a fumigation system provided with a decomposition device and a formaldehyde generation / decomposition device, and a formaldehyde decomposition device for decomposing indoor formaldehyde generated from building materials in a new house or the like.

[0002]

2. Description of the Related Art Conventionally, as a method of decomposing formaldehyde used for fumigation, a scrubber method,
Various methods have been proposed and implemented, such as a catalytic oxidation method for heating the target gas to a certain temperature, a dilution method, and an adsorption removal method using an adsorbent. For example, as a device for fumigating a room with formaldehyde gas, a device disclosed in Japanese Utility Model Publication No. 64-927 and Japanese Patent Publication No. 2-3620 is known. This device consists of a container that stores an aqueous solution of formaldehyde, a heater that heats the container to boil and evaporate the aqueous solution, a heat-sensitive sensor that detects the temperature rise due to the liquid exhaustion in the container, and turns off the heater power. A removable center is provided with a lid having a blow-out port protruding upward. When performing fumigation treatment using this device, an aqueous solution corresponding to the volume of the room to be treated is placed in the container, the lid is closed, and when the heater is turned on, formaldehyde gas is ejected upward from the outlet of the lid. You.

As a method of treating formaldehyde gas remaining in a fumigated room, Japanese Patent Laid-Open No.
JP-A-4-161534 discloses a method of removing a catalyst such as platinum by heating and reacting the catalyst disclosed in JP-A-7-130534.
No. 160, a method of neutralizing formaldehyde with ammonia, and a method of Japanese Patent Publication No. 60-17542, which neutralizes formaldehyde with ammonia and decomposes it with a catalyst, are known.

[0004]

However, the above-mentioned conventional method for decomposing formaldehyde has the following problems. That is, in the method of neutralizing formaldehyde by spraying ammonia gas into the room to be treated, a white powder of a neutralized product is generated,
This removal operation had to be performed. Also, in the case of performing a circulating treatment indoors by a method of decomposing and removing formaldehyde by heating and reacting a catalyst such as platinum,
There is a drawback that the temperature in the room rises,
Since a heat exchanger for heating is required, there is also a problem that the apparatus becomes large.

[0005] Further, a device or equipment used for fumigation treatment using formaldehyde gas and a device used for removing the formaldehyde gas must be separately prepared, which increases the installation space of the device, and It was necessary to separately control the operation of the two devices.

The present invention has been proposed to solve the above-mentioned problems of the prior art. A first object of the present invention is to provide a formaldehyde decomposition apparatus which does not need to heat a gas to be treated or a catalyst. To provide. A second object is to provide an air conditioner provided with a formaldehyde decomposition catalyst that does not require heating the gas to be treated or the catalyst. Furthermore, a third object is to provide a formaldehyde generator and a fumigating system equipped with a decomposition apparatus and a formaldehyde generation / decomposition apparatus capable of generating formaldehyde gas and decomposing formaldehyde without heating the gas to be treated or the catalyst. Is to do.

[0007]

In order to achieve the above object, a formaldehyde decomposition apparatus according to claim 1 is provided.
A gas supply port for introducing a gas to be treated into the apparatus,
A blower that sucks and sends out the gas to be processed,
A catalyst for formaldehyde decomposition and a gas outlet for discharging the gas after the formaldehyde decomposition treatment are provided in the flow path of the gas to be treated, and the gas to be treated is repeatedly circulated in the apparatus. It is characterized by performing a formaldehyde decomposition treatment.

According to the formaldehyde decomposing apparatus according to the first aspect of the present invention, since the indoor air to be treated is circulated to decompose the formaldehyde contained in the air, the decomposition and removal rate is reduced. Need not be 100%, and since there is no need to heat the catalyst as in the conventional case, a heater for heating the catalyst is not required. In addition, initial costs and running costs in the formaldehyde decomposition treatment can be reduced.

An air conditioner provided with a catalyst for decomposing formaldehyde according to claim 2 is provided with a catalyst for decomposing formaldehyde in an air conditioner having a heat exchange means, a blowing means, an intake port and an exhaust port. While connecting the air conditioner to the room to be processed, a path is provided to bypass the air conditioner,
The damper provided between the air conditioner and the room to be processed and the degree of opening and closing of the damper provided in the bypass path are changed between an initial stage and a later stage of the disassembling process. .

According to the air conditioner equipped with the formaldehyde decomposition catalyst according to claim 2 having the above-mentioned configuration, the initial stage of the decomposition treatment in which the concentration of formaldehyde is high,
By changing the degree of opening and closing of the damper provided between the air conditioner and the room to be processed and the degree of opening and closing of the damper provided in the bypass path, in the later stage of the decomposition processing in which the concentration became low, the flow rate of air flowing through both paths was changed. By changing, it is possible to efficiently perform the formaldehyde decomposition treatment without impairing the formaldehyde decomposition ability of the catalyst disposed in the air conditioner.

Further, by providing the catalyst for the formaldehyde decomposition treatment integrally with the air conditioner, the blower and the casing can be shared, so that the equipment cost can be reduced and the mounting space can be shared. In addition, since heating of the gas to be treated or heating of the catalyst is not required,
Heated air is not circulated in the room, the room temperature rise is only slight due to the heat of reaction due to decomposition, there is no need to make the room heat-resistant, and after the decomposition is completed, it returns to the air conditioning state before fumigation. It is easy and energy saving.

A fumigating system comprising a formaldehyde generator and a decomposition apparatus according to claim 3 comprises a predetermined formaldehyde generator and a formaldehyde decomposition apparatus provided with a separately formed formaldehyde decomposition catalyst. When the formaldehyde generator is connected to a room to be treated, a first bypass path that bypasses the formaldehyde generator, and a second bypass path that bypasses the formaldehyde decomposer are provided to perform fumigation processing. Operating the formaldehyde generator by closing dampers provided in the first bypass path and the second bypass path,
When performing the formaldehyde decomposition treatment, the path passing through the formaldehyde generator is closed, and the dampers provided in the first bypass path and the second bypass path are opened to operate the formaldehyde decomposition apparatus. It is characterized by having done.

[0013] According to the fumigating system having the formaldehyde generating device and the decomposing device according to claim 3 having the above configuration, there is no need to dispose the formaldehyde generating device and the decomposing device in the room, and the generating device and the damper are provided. The formaldehyde generation and decomposition treatments can be selectively performed only by operating the blower. Further, even if the number of rooms to be treated is large, fumigation can be performed at once using a duct, or, on the contrary, only a desired room can be selected from many rooms.

Formaldehyde generation according to claim 4
In the decomposition apparatus, a blower is housed in the first unit, a formaldehyde generator is installed in the second unit,
The third unit is provided with a formaldehyde decomposition treatment section provided with a formaldehyde decomposition catalyst,
An openable / closable sealing member is provided between the first unit and the second unit and between the first unit and the third unit. When fumigation is performed, the first unit and the third unit are closed. When the sealing member provided between the units is closed, the first unit and the second unit are communicated with each other, and only the formaldehyde generating unit is operated to perform the formaldehyde decomposition treatment. 1 unit and 2nd
The sealing member provided between the units is closed, and the first unit is closed.
And the third unit are communicated with each other, so that only the formaldehyde decomposition treatment section is operated.

According to the formaldehyde generating / decomposing apparatus according to the fourth aspect of the present invention, if the apparatus is previously installed in the room where the fumigation process is performed, a predetermined operation can be performed by remote control operation or computer control. Since a formaldehyde gas is generated for a time to perform a fumigation process and then a decomposition process of the formaldehyde, it is not necessary for a human to enter and operate in a space where formaldehyde harmful to the human body exists. In addition, since the formaldehyde generating device and the decomposition device can be integrally configured, the size of the device can be reduced.

[0016]

Embodiments of the present invention (hereinafter, referred to as embodiments) will be specifically described below with reference to the drawings.

[1. First Embodiment] Formaldehyde Decomposing Device [1-1. Configuration of First Embodiment] The formaldehyde decomposition apparatus of the present embodiment is configured as shown in FIG. That is, a gas to be treated containing formaldehyde (hereinafter referred to as a gas to be treated) is provided inside the apparatus.
Blower 1 for sucking and sending air, and diffusion plate 2 for equalizing the gas flow of the gas to be processed sent from this blower 1
And catalyst 3 for decomposing formaldehyde at room temperature, HE
The PA filter or the medium-performance filter 4 is sequentially disposed in the flow path of the gas to be processed.

The apparatus is provided with a gas supply port 5 for introducing the gas to be treated into the apparatus and a gas discharge port 6 for discharging the gas after the formaldehyde decomposition treatment. An airtight shutter 7 is attached to the outlet 6 in order to prevent formaldehyde supplied into the room for fumigation treatment from coming into contact with the catalyst 3 and being decomposed. The airtight shutter 7 may be an electric shutter. Further, a caster 8 is attached to the bottom surface of the present apparatus so that the present apparatus can be easily moved to a desired installation position.

As the catalyst 3, a platinum catalyst is used. In addition, the catalyst 3 and the HEPA filter or the medium-performance filter 4 are disposed so as to be exchangeable. Further, the present apparatus can be directly installed in the room where the fumigation process is performed, or by connecting the gas supply port 5 and the gas discharge port 6 to the room where the fumigation process is performed using a duct or a connecting member. Alternatively, it can be installed at a desired position outside the room where the fumigation treatment is performed.

The operation of the apparatus is controlled as follows. First, when the present apparatus is previously installed in the room where the fumigation process is performed, the ON / OFF of the present apparatus is performed by a remote control operation, a computer control, or the like in order to avoid a danger of an operator touching a toxic gas. It is desirable to configure so as to control OFF. Further, the computer control is set so that after a predetermined time has elapsed from the start time of the fumigation process in the room where the present device is installed, the process automatically shifts to the formaldehyde decomposition process,
In a newly built house or the like, it can be set to operate automatically when the indoor formaldehyde concentration exceeds a certain value.

On the other hand, when the present apparatus is installed outside the room where the fumigation process is performed (for example, in a corridor), an operator operates a switch provided in the present apparatus to directly turn ON / OFF. Can be controlled, or the operation can be controlled by remote control operation or computer control in the same manner as described above.

[1-2. Operation of First Embodiment] The formaldehyde decomposing apparatus of the present embodiment having the above-described configuration operates as described below. That is, when the present apparatus is operated by a remote control operation, a computer control, or the like, the airtight shutter 7 attached to the gas supply port 5 and the gas discharge port 6 is opened, and the gas to be processed is introduced into the apparatus by the blower 1. . The gas to be treated introduced into the apparatus is sent to the catalyst 3 after the gas flow thereof is made uniform by the diffusion plate 2, and the formaldehyde in the gas to be treated is decomposed into carbon dioxide and water (steam) by the catalyst 3. Is done. Thereafter, the decomposed gas is supplied to the room again from the gas outlet 6 via the HEPA filter or the medium-performance filter 4. By repeating the above operation, formaldehyde contained in the indoor air is gradually decomposed.

[1-3. Effect of First Embodiment] In the formaldehyde decomposing apparatus of the present embodiment having the above configuration, the air in the room to be treated is circulated,
In order to decompose formaldehyde contained in the air, the decomposition removal rate may not be 100%. Therefore, unlike the related art, there is no need to heat the gas to be treated or the catalyst, so that a heater for heating the catalyst is not required. In addition, initial costs and running costs in the formaldehyde decomposition treatment can be reduced.

Further, the formaldehyde decomposing apparatus of the present embodiment is composed of an independent unit and can be easily moved by providing casters. Therefore, a plurality of units can be installed according to the size of the room to be treated. However, it can be installed at a desired position regardless of indoor or outdoor. Furthermore, since a formaldehyde can be decomposed into carbon dioxide and water by using a platinum catalyst, the environmental load can be significantly reduced. In addition, the indoor humidity which is increased by the decomposition treatment of formaldehyde is small and varies depending on the concentration of formaldehyde in the gas to be treated.
For 0 to 2000 ppm HCHO, the room humidity increases only a few percent.

Further, the apparatus is installed in a room before formaldehyde fumigation, and formaldehyde is generated by a separately formed formaldehyde generator to perform fumigation treatment. Thereafter, the apparatus is operated by remote control or computer control. In this case, the formaldehyde is decomposed and removed to eliminate the need for humans to enter the space where formaldehyde is present, which is excellent in safety.

[2. Second Embodiment] ... air conditioner provided with formaldehyde decomposition catalyst [2-1. Configuration of Second Embodiment] In the present embodiment, a catalyst for decomposing formaldehyde is incorporated in an air conditioner that performs general temperature and humidity adjustment. That is, the air conditioner 10 including the formaldehyde decomposition catalyst of the present embodiment
Is, as shown in FIG. 2, a coil unit 11 for heat exchange.
And a catalyst 12 capable of decomposing formaldehyde at room temperature, and a HEPA filter or a medium-performance filter 13
And a blower 14. In addition, this air conditioner 10
A first air inlet 15 for introducing room air to be air-conditioned into the apparatus, a second air inlet 16 for introducing outside air (OA) into the apparatus, and formaldehyde decomposition. An exhaust port 17 is provided for discharging the treated air or outside air to the outside of the apparatus.

Further, an exhaust port 17 provided in the air conditioner is provided.
And an air vent 18 provided on the ceiling of each room to be air-conditioned
A first duct 19 is disposed between the first duct 19 and the first duct 19, and an airtight damper 19a is provided in the first duct 19. In addition, a suction port 2 provided on the ceiling of each room to be air-conditioned
A second duct 21 is provided between the first air inlet and the first air inlet 15 provided in the air conditioner. Further, a third duct 22 that bypasses the air conditioner 10 is provided between the first duct 19 and the second duct 21, and an airtight damper 22a is provided in the third duct 22. I have. In addition, the ventilation port 1 provided on the ceiling of each room to be air-conditioned
The airtight dampers 18a,
20a is provided. Further, the second duct 21 has an exhaust duct 25 corresponding to the introduction of outside air from the air conditioner 10,
An airtight damper 26 and an exhaust fan 27 are provided.

With this configuration, the exhaust air from each room to be air-conditioned is supplied from the suction port 20 → the second duct 21 → the first air inlet port 15 → the air conditioner 10 → the air outlet port 17 → the first air port. Duct 19 → first path circulating through air inlet 18, suction port 20 → second duct 21 → first air inlet 1
5 → air conditioner 10 → exhaust port 17 → third duct 22 → first
, Through the second path circulating through the air inlet 15 → the air conditioner 10.

[2-2. Operation of Second Embodiment] The air conditioner provided with the formaldehyde decomposition catalyst of the present embodiment having the above configuration operates as follows. First,
The fumigation process of a room to be air-conditioned is performed by a formaldehyde generator 23 separately installed in the room. In this case, the airtight damper 18 connected to the air inlet 18 and the air inlet 20 provided on the ceiling of the room where the fumigation process is performed.
By closing a and 20a, the fumigation gas is prevented from leaking into the first duct 19 and the second duct 21.

In order to decompose formaldehyde after fumigation, an airtight damper 18 connected to a ventilation port 18 and a suction port 20 provided on the ceiling of the room subjected to the fumigation treatment.
a and 20a are both opened, the airtight dampers 24 and 26 are closed, and the air conditioner 10 is operated. In this case, by adjusting the degree of opening and closing of the hermetic damper 19a provided in the first duct 19 and the hermetic damper 22a provided in the third duct 22, a part of the air volume of the blower 14 (for example,
1/10) is circulated into the room by the first path, and the remaining part of the air volume of the blower 14 is changed from the air conditioner 10 → the exhaust port 17 → the third duct 22 → the first intake port 15 → the air conditioner A second path circulating through 10 can be circulated.

As a result, the airflow of 9/10 is circulated many times between the air conditioner 10 and the bypass path, the formaldehyde in the inside is decomposed, and the air containing a large amount of formaldehyde from the room is replenished little by little. Will be done. At the time of the initial decomposition, air having a high formaldehyde concentration comes into contact with the catalyst having a removal rate of not 100% and passes through the first duct 19 without being completely decomposed. It is difficult to prevent. However, according to this method, it is possible to decompose formaldehyde in the air passing through the first duct 19 by almost 100%. If the duct system is completely airtight, the third duct 22
In addition, the airtight damper 22a becomes unnecessary, and the system becomes simpler.

When the operation of the air conditioner is repeated in this manner, the formaldehyde concentration in the room gradually decreases, so that the amount of air circulating in the first path and the amount of air circulating in the second path are reduced. Is changed, and the amount of air circulating in the first path is gradually increased. Then, even if all the air discharged from the room is introduced into the air conditioner 10, if the concentration of the catalyst 12 is such that formaldehyde contained in the air can be decomposed to a safe concentration, the third method is adopted. The airtight damper 22a provided in the duct 22 is closed and circulated through only the first path.

Further, after the indoor concentration of formaldehyde has decreased to a safe level, the airtight dampers 24 and 26 provided in the air duct of the air conditioner 10 are opened, and the outside air is passed through the second air inlet 16. Is introduced, the exhaust fan 27 is operated to discharge an amount corresponding to the amount of outside air, and the carbon dioxide generated by the formaldehyde decomposition treatment is diluted and discharged. Thereafter, the air conditioner 10 performs a normal air conditioning operation, The outside air introduced from the second air inlet 16 is heated at a constant temperature
After adjusting to humidity, supply to each room.

The amount of air circulating in the first path and the amount of air circulating in the second path as described above are distributed using an airtight damper provided in the first duct 19 using a timer. 19a and the degree of opening and closing of the airtight damper 22a provided in the third duct 22 may be changed,
A concentration sensor for detecting the concentration of formaldehyde may be provided indoors, on an air conditioner, or on a duct such as a bypass path, and the degree of opening and closing of the damper may be changed according to the change in concentration.

[2-3. Effects of the Second Embodiment] According to the air conditioner provided with the formaldehyde decomposition catalyst of the present embodiment having the above-described configuration, the initial stage of the decomposition process in which the concentration of formaldehyde is high and the period of the decomposition process in which the concentration is low are reduced. By changing the opening / closing degree of the hermetic damper 19a provided in the first duct 19 and the hermetic damper 22a provided in the third duct 22 in the latter period, the gas flows through the first path and the second path. Changing the air flow rate, the air conditioner 10
The catalyst 12 disposed therein has a formaldehyde decomposition ability of not 100%, and the first duct 19 has a positive pressure, is not completely airtight, and is safe and efficient even if there is some leakage. A suitable formaldehyde decomposition treatment can be performed.

Further, by providing the catalyst for the formaldehyde decomposition treatment integrally with the air conditioner 10, the equipment cost can be reduced and the mounting space can be shared.
In addition, since the air or catalyst containing formaldehyde is not heated, the heated air is not circulated in the room, and the room temperature rise is only slight due to the reaction heat due to decomposition. None, and it is easy to return to the air-conditioning state before fumigation after completion of decomposition, which is excellent in energy saving. Furthermore, when the decomposition treatment of formaldehyde is not performed, it is possible to remove the catalyst and install this catalyst in an air conditioner of another system.

[3. Third Embodiment] ... fumigation system provided with formaldehyde generator and dedicated decomposition device [3-1. Configuration of Third Embodiment] In the present embodiment, a formaldehyde generator and a formaldehyde decomposing device separately provided are connected to a plurality of rooms such as a clean room, and formaldehyde is supplied to a desired room to perform fumigation. After that, a formaldehyde decomposition treatment can be performed.

The fumigation system provided with the formaldehyde generator of the present embodiment and a dedicated decomposition device is configured as shown in FIG. That is, each room to be subjected to the fumigation treatment has a ventilation port 31 and a suction port 3 on its ceiling.
2 are provided. Outside the room, a formaldehyde generator 33 and a formaldehyde decomposition device 34 are separately provided.

The formaldehyde generator 33 and the air outlet 31 are connected by a duct 37 having airtight dampers 35 and 36, and the suction port 32 and the formaldehyde generator 33 are airtight dampers 38 and 3 respectively.
9 and 40 are connected to a duct 42 having a blower 41. The duct 37 and the duct 42 have:
A duct 43 that does not pass through the formaldehyde generator 33 is connected, and the duct 43 is provided with an airtight damper 52.

A duct 42 connecting the suction port 32 and the blower 41 is provided with a formaldehyde decomposition device 3.
4 and a formaldehyde decomposer 34
A duct 45 is provided for joining the air passing through the duct 42 to the duct 42, and airtight dampers 46 and 47 are attached to the duct 44 and the duct 45, respectively. The formaldehyde decomposing device 34 includes a catalyst 34a capable of decomposing formaldehyde at room temperature,
A PA filter or a medium performance filter 34b is provided.

The air outlet 31 is connected to a duct 48 for introducing air from an air conditioner or the like into the room.
A duct 49 for returning indoor air to the air conditioner or discharging the air to the atmosphere is connected to the suction port 32, and these ducts 48, 49 are provided with airtight dampers 50, 51. The formaldehyde generating device may be any device that can generate formaldehyde gas, and various known formaldehyde generating devices can be used.

[3-2. Operation of Third Embodiment] The fumigating system including the formaldehyde generator and the dedicated decomposition device according to the present embodiment having the above-described configuration includes a formaldehyde generator or a dedicated decomposition device and a room to be treated. Air can be selectively circulated between them.

First, when performing the fumigation process, FIG.
As shown in (A), the airtight dampers 46, 47, 5
0, 51, 52 are closed and the airtight dampers 35, 36, 3
8, 39 and 40 are opened and the formaldehyde generator 3
By operating 3, formaldehyde gas is supplied to the room to be treated. In this case, by closing the airtight dampers 46 and 47, the fumigation gas is prevented from circulating in the formaldehyde decomposition device 34.

On the other hand, to decompose formaldehyde after fumigation, as shown in FIG.
Close 5,40,50,51 and airtight dampers 36,3
8, 46, 47 and 52 are opened, and the formaldehyde-containing fumigation gas is circulated through the formaldehyde decomposing device 34.

After the indoor formaldehyde concentration has dropped to a safe level in this way, the airtight damper 3
The airtight dampers 50 and 51 are opened by closing the airtight dampers 6 and 38, and carbon dioxide generated by decomposing formaldehyde is diluted and ventilated by a general air conditioner (not shown), so that normal air conditioning operation can be started.

[3-3. Effect of Third Embodiment] In the fumigating system including the formaldehyde generator and the dedicated decomposition device according to the present embodiment having the above configuration,
There is no need to arrange a formaldehyde generator or decomposition device in the room, and formaldehyde generation and decomposition can be performed only by operating the generator, damper, and blower.
Therefore, it is suitable for places that need to be periodically fumigated, such as animal breeding houses, laboratories, and hospitals. Further, even if the number of rooms is large, it is possible to perform fumigation all at once using a duct, or conversely, to select only a desired room from among many rooms and perform fumigation processing. By controlling the airtight dampers in each room, the fumigation time can be adjusted for each room.

[4. Fourth embodiment] ... formaldehyde generation / decomposition device (indoor installation type) [4-1. Configuration of Fourth Embodiment] The formaldehyde generating / decomposing apparatus of the present embodiment is one in which a formaldehyde generating apparatus is incorporated in the formaldehyde decomposing apparatus shown in the first embodiment, and one apparatus is required for fumigation processing. It is configured to generate not only formaldehyde, but also to perform a decomposition treatment of formaldehyde after the fumigation treatment is completed.

That is, as shown in FIG. 4, the formaldehyde generating / decomposing apparatus of this embodiment is roughly composed of three units. First, the first unit A
The first airtight shutter 62 and the second airtight shutter 63 are opened during the fumigation process, and the air in the room to be subjected to the fumigation process is sucked through the first airtight shutter 62 during the fumigation process. The suctioned air is sent through the second airtight shutter 63 to the second unit B having a formaldehyde generating function.

On the other hand, when the fumigation process is completed and the formaldehyde decomposition process is performed, the second airtight shutter 6
3 is closed, the first hermetic shutter 62, the third hermetic shutter 64, and the fourth hermetic shutter 74 are opened, and the indoor air subjected to the fumigation treatment is sucked and sucked through the first hermetic shutter 62. Air is passed through a third hermetic shutter 64 through a third airtight shutter 64 having a formaldehyde decomposition function.
To the unit C.

The second unit B having a formaldehyde generating function includes a formalin tank 65 for storing a formalin solution and a formaldehyde generating container 66.
A pipe 67 for injecting the formalin solution from the formalin tank 65 into the formaldehyde generating container 66; an electric valve 68 for adjusting the injection amount of the formalin solution; and a heater 69 for heating the formaldehyde generating container 66 to generate formaldehyde gas. Then, a formaldehyde generating port 70 for discharging the generated formaldehyde gas into the room is provided, and the formaldehyde gas is supplied to the room where the fumigation process is performed.

Further, the third unit C having a formaldehyde decomposing function is provided with a catalyst 71 for decomposing formaldehyde at room temperature and a HEPA filter or a medium performance filter 72. Is equipped with a formaldehyde concentration meter 73 for measuring the formaldehyde concentration in the room. After decomposing the formaldehyde in the indoor air after the fumigation supplied by the blower 61 provided in the first unit A, the fourth airtight shutter 74 is opened, and the fumigation is performed. It is configured to send out the air after the decomposition treatment into the room after the treatment. Needless to say, the first airtight shutter 62 to the fourth airtight shutter 74 may be electric shutters.

A caster 75 is attached to the bottom of the formaldehyde generating / decomposing apparatus of the present embodiment.
The apparatus is configured so that it can be easily moved to a desired installation position. In addition, since this device is installed in a room where the fumigation process is performed, ON / OFF control of this device is performed by a timer operation, a remote control operation or a remote control operation in order to avoid a risk of an operator coming into contact with a toxic gas. It is desirable to be configured so that it can be controlled by computer control or the like. Further, the timer operation and the computer control can be set so that the process automatically shifts to the formaldehyde decomposition process after a predetermined time has elapsed from the start time of the fumigation process in the room where the present apparatus is installed.

[4-2. Operation of Fourth Embodiment] The formaldehyde generation / regeneration according to the fourth embodiment having the above-described configuration is performed.
The decomposer works as described below. First, when the fumigation process is performed, the first hermetic shutter 62 and the second hermetic shutter 63 are opened, the third hermetic shutter 64 and the fourth hermetic shutter 74 are closed, and the blower 61 Is operated to suck the indoor air and send it to the second unit B,
Formaldehyde generation container 6 from formalin tank 65
6, a formaldehyde gas is generated by heating a formaldehyde generating container 66 with a heater 69, and the formaldehyde gas is supplied into the room. In this process, for example, the amount of formalin solution may be determined based on the volume and fumigation concentration of the fumigation room, or the formalin solution may be supplied by the formaldehyde concentration meter 73 until the concentration reaches a predetermined concentration. The same applies to the operation of the heater.

On the other hand, when the fumigation process is completed and the decomposition process of formaldehyde is performed, the first hermetic shutter 62, the third hermetic shutter 64, and the fourth hermetic shutter 74 are opened by computer control or the like. 2, the airtight shutter 63 is closed, and the blower 61 is operated to suck the air in the room after the fumigation treatment, sent to the third unit C, decompose formaldehyde by the catalyst 71, and
The air after the decomposition process is supplied to the room through the EPA filter or the medium-performance filter 72.
This process is performed, for example, using a formaldehyde concentration meter 7.
The control is performed so that the detection is performed until the detected value of No. 3 reaches a predetermined density.

[4-3. Effect of Fourth Embodiment] According to the formaldehyde generating / decomposing apparatus of the present embodiment, if this apparatus is previously installed in the room where the fumigation process is performed, the operation can be performed for a predetermined time by a timer operation, a remote control operation, or a computer control. Since fumigation treatment is performed by generating formaldehyde gas and then decomposition treatment of formaldehyde can be performed, it is not necessary for a human to enter and operate in a space where formaldehyde harmful to the human body exists.
In addition, since the formaldehyde generating device and the decomposition device can be integrally configured, the size of the device can be reduced. Further, since the casters 75 are attached to the bottom surface, the present device can be easily moved to a desired installation position.

[5. Fifth Embodiment] Formaldehyde Generating / Decomposing Apparatus (Outdoor Installation Type) The formaldehyde generating / decomposing apparatus of the present embodiment is designed so that the formaldehyde generating / decomposing apparatus described in the fourth embodiment can be installed outdoors. It is composed.

[5-1. Configuration of Fifth Embodiment] The configuration of a formaldehyde generating / decomposing apparatus of this embodiment and a processing chamber to which the apparatus is connected will be described with reference to FIGS.

(A) Processing Chamber First, the configuration of the processing chamber 80 will be described. That is, FIG.
As shown in (A) and (B), the processing chamber 80 is provided with an air outlet 81 and an air inlet 82 for air conditioning, and is connected to an air conditioner (not shown) via a duct. An airtight damper 83 for exhaust and an airtight damper 84 for air supply are provided in the ducts of these air conditioning systems, and an air volume sensor 85 is further provided in the air supply system.

On the side of the processing chamber 80, a first processing chamber side connection port 86 and a second processing chamber side connection port 87 are provided. The first processing chamber side connection port 86 serves as an outlet for formaldehyde fumigating gas sent from a formaldehyde generation / decomposition device 90 described later, and the second processing chamber side connection port 87 converts formaldehyde generation / decomposition air into the processing chamber. It is a suction port for circulation to the decomposition device 90.

(B) Formaldehyde generating / decomposing device The configuration of the formaldehyde generating / decomposing device 90 connected to each processing chamber 80 having the above-described configuration will be described below. That is, as shown in FIGS. 5A and 5B, the formaldehyde generating / decomposing device 90 of the present embodiment is configured in a housing having casters 91 on the bottom surface. In this case, for example, a liquid crystal operation panel (not shown) is provided, and a first unit side connection port 92 and a second unit side connection port 93 are formed. And these unit side connection ports 92 and 93 are
It is connected to the processing chamber side connection ports 86 and 87 provided in the processing chamber via a connection duct.

As shown in FIG. 5A, the formaldehyde generating / decomposing apparatus 90 of this embodiment is divided into a formaldehyde generating section 100 and a formaldehyde decomposition section 110. First, in the formaldehyde generator 100, a circulation fan 102 is connected to a formaldehyde generator 101. Formaldehyde delivery piping 103 is connected to the discharge side of the circulation fan 102, and is connected to a first unit-side connection port 92 via a first electric butterfly valve 104.
On the other hand, an intake pipe 105 is connected to the intake side of the circulation fan 102, and a second unit-side connection port is provided via a formaldehyde concentration meter 106 for measuring the concentration of formaldehyde in the circulating air and a second electric butterfly valve 107. 93
It is connected to the.

Further, the formaldehyde delivery pipe 103
Is provided with a flow rate adjusting valve 108 so that the flow rate of formaldehyde fumigation gas flowing inside can be adjusted. The formaldehyde generator 101
Any device may be used as long as it generates formaldehyde gas, and various known formaldehyde gas generators using electric heater heating can be used.

On the other hand, the formaldehyde decomposition processing section 110
Is connected to a pipe to which a formaldehyde concentration meter 106 connected to the second unit side connection port 93 is attached.
A catalyst 112 capable of decomposing formaldehyde at room temperature, a HEPA filter 113 and a blower 114 are sequentially disposed via an electric butterfly valve 111, and the first unit side through a fourth electric butterfly valve 115. It is connected to the connection port 92.

[5-2. Operation of Fifth Embodiment] The formaldehyde generation / reproduction according to the fifth embodiment having the above-described configuration is performed.
The operation of the decomposition device is described as (a) preparation work, (b) fumigation work,
(C) Formaldehyde decomposition work and (d) return to normal operation will be described separately. Although a series of these operations are performed in a predetermined order, all of them can be automated.

(A) Preparation work First, the preparation work for formaldehyde fumigation will be described. That is, before the fumigation operation is performed, the “fumigation processing mode” is selected by an operation panel, a computer, or the like provided in the central monitoring room or the like, and while the chamber pressure in the processing chamber 80 is kept constant, the airtight damper 83 for exhaust is used. And, by closing the air supply damper 84, the indoor air conditioning is stopped. Then, the door for entry and exit of the workers is laid out to seal the processing chamber. When the inside of the processing chamber 80 is divided into a plurality of sections, the doors between the respective chambers are opened so that the formaldehyde fumigating gas can be distributed to all of the individual compartments.

Next, the formaldehyde generating / decomposing device 9
A predetermined amount of formalin solution is injected into the formalin tank of the 0 formaldehyde generator 101. Then, the formaldehyde generating / decomposing apparatus is moved to the front of the processing chamber 80, and the unit side connection ports 92, 93 and the processing chamber side connection ports 86, 87 are connected.

(B) Fumigation work After the above preparation work, fumigation work is performed. That is, when "start fumigation" is selected by an operation panel or a computer provided in the central monitoring room or the like, the third and fourth fumigations are started.
Electric butterfly valves 111 and 115 are closed, the first and second electric butterfly valves 104 and 107 are opened, and the electric heater of the formaldehyde generator 101 is
The motor of the circulation fan 102 is energized. Then, formaldehyde fumigation gas is generated in the formaldehyde generator 101, and this gas is sent out by the circulation fan 102, and is sent through the formaldehyde delivery pipe 103, the first unit side connection port 92, and the first processing chamber side connection port 86. After flowing into the processing chamber 80, sterilization processing in the chamber is started. The amount of formaldehyde fumigation gas to be delivered is adjusted by controlling the flow rate control valve 108 provided in the formaldehyde delivery pipe 103.

Thereafter, sterilization is performed by leaving the room filled with fumigation gas for a certain period of time. The concentration of the supplied formaldehyde fumigation gas is determined in advance in accordance with the volume of the processing chamber 80 and the fumigation concentration, or the generation amount is adjusted by the formaldehyde concentration meter 106.

(C) Formaldehyde Decomposition Work As described above, after sterilization by fumigation treatment, a worker performs decomposition work of formaldehyde fumigation gas without entering the room. That is, when "start of formaldehyde decomposition step" is selected by an operation panel or a computer provided in the central monitoring room or the like, the first and second electric butterfly valves 104 and 107 are closed, and the third and fourth electric butterfly valves are closed. The butterfly valves 111 and 115 are opened, the drive motor of the blower 114 is energized, and the air in the processing chamber 80 flows into the formaldehyde decomposition processing unit 110 through the second unit side connection port 93. Have been. Then, the formaldehyde contained in the air in the processing chamber 80 is decomposed by the catalyst 112 provided in the formaldehyde decomposition processing unit 110, and the air after the decomposition processing is again passed through the HEPA filter 113 into the processing chamber 80. Is configured to be supplied.

(D) Returning operation to normal operation As described above, the decomposition treatment of the formaldehyde fumigation gas in the processing chamber 80 proceeds, and the formaldehyde concentration meter 1
06, it is confirmed that the formaldehyde fumigation gas in the processing chamber 80 has been completely decomposed, and then the air conditioner, the airtight damper 83 for exhaust and the airtight damper 84 for air supply are controlled, so that the chamber pressure is kept constant. Returning to normal operation is performed while being maintained.

The chamber pressure in the processing chamber, the start and end of fumigation, the sterilization time, the decomposition processing time, the start and end of the decomposition processing, the return to the normal operation, and the like are controlled by an operation panel or a computer provided in the central monitoring room or the like. Can be configured so that it can be constantly monitored. In addition, setting, changing, suspending, and the like of fumigation time and decomposition processing time can be performed based on a program set in advance for each room, or based on numerical values input from a screen of an operation panel or the like. Can also. Further, in consideration of safety, it can be configured to automatically stop when an abnormality occurs.

[5-3. Effects of Fifth Embodiment] The effects of the formaldehyde generating / decomposing apparatus of the present embodiment are as follows. (A) The fumigation work in the processing chamber 80 and the subsequent formaldehyde decomposition processing work are performed by one
By using the disassembly device, it can be automatically performed continuously in a different route from the air supply / exhaust ports 81 and 82 of the air conditioning system, so that the worker does not need to enter the room filled with formaldehyde fumigation gas, which is safe. The performance is greatly improved.

(B) The fumigation operation and the formaldehyde decomposition operation can be performed for each processing chamber 80 by the formaldehyde generating / decomposing device 90 installed outside each processing chamber 80. It is easier to adjust the fumigation time, the decomposition time, and the like, as compared with the case where the process is performed uniformly. Particularly, in the present embodiment, the operation can be easily performed by the operation panel or the computer provided in the central monitoring room or the like, so that the labor of the operator is greatly reduced. In addition, since the work is performed by setting the formaldehyde generating / decomposing device 90 in front of the individual processing chambers 80, erroneous processes other than the target processing chambers are erroneously performed as compared with the case where the processing chambers 80 are unified. There is no danger of processing the room.

(C) The unit side connection ports 92, 93 and the processing chamber side connection ports 86, 87 are used as suction ports and supply ports both during fumigation of formaldehyde and during decomposition of formaldehyde. There is no need, the structure can be simplified,
Preparation work is easy.

(D) The formaldehyde fumigation gas is heavier than air, but in this embodiment, the circulation fan 102
, The formaldehyde fumigation gas is forcibly circulated, so that even if the processing chamber side connection ports 86, 87 are provided at relatively low positions, the formaldehyde fumigation gas can be distributed throughout the room, and the unit side connection ports 92, 87 The connection work between 93 and the processing chamber side connection ports 86 and 87 can be easily performed.

(E) Since the formaldehyde generating section 100 and the formaldehyde decomposing section 110 are compactly integrated in a single formaldehyde generating / decomposing apparatus 90, the apparatus is convenient for movement, storage and maintenance. Inspection becomes easier. In particular, since the casters 91 are attached to the formaldehyde generating / decomposing device 90, the transfer to the individual processing chambers 80 can be performed easily and quickly.

[6. Sixth Embodiment] This embodiment is a modification of the fifth embodiment described above, in which a gas flow path from the processing chamber 80 to the formaldehyde decomposition processing section 110 is provided.
This is formed through a formaldehyde exhaust port 120 provided on the ceiling. In the present embodiment, the same members as those in the fifth embodiment are denoted by the same reference numerals, and description thereof will be omitted.

[6-1. Configuration of Sixth Embodiment] The configuration of a formaldehyde generating / decomposing apparatus of this embodiment and a processing chamber to which the apparatus is connected will be described with reference to FIGS.

(A) Processing Chamber As shown in FIGS. 6A and 6B, a formaldehyde exhaust port 120 is provided on the ceiling of the processing chamber 80 together with an air outlet 81 and an air inlet 82 for air conditioning. The formaldehyde decomposition processing section 1 of the formaldehyde generation / decomposition device 90 is provided by a duct 122 having an electric butterfly valve 121.
10 is connected. The first processing chamber side connection port 86 provided on the side surface of the processing chamber 80 serves as an outlet for formaldehyde fumigation gas sent from the formaldehyde generating / decomposing device 90 or a gas after formaldehyde decomposition processing. On the other hand, the second connection port 87 on the processing chamber side is an outlet for the gas after the formaldehyde decomposition treatment or a suction port for circulating the air in the processing chamber 80 to the formaldehyde generating section 100.
Other configurations are the same as in the fifth embodiment.

(B) Formaldehyde generation / decomposition device The formaldehyde decomposition treatment section 110 of the formaldehyde generation / decomposition device 90 of this embodiment has a formaldehyde concentration upstream of a catalyst 112 capable of decomposing formaldehyde at room temperature. A formaldehyde concentration meter 106 for measurement is provided, and the duct 122 is connected to the formaldehyde decomposition processing unit 110 via a hose 123 or the like.

[6-2. Operation of Sixth Embodiment] The formaldehyde generation / reproduction of the present embodiment having the above configuration
The decomposer works as described below. Also in this section, only differences from the fifth embodiment will be described.

(A) Preparatory work In the preparatory work for formaldehyde fumigation, the airtight damper 83 for exhaust, the airtight damper 84 for air supply, and the electric butterfly valve 1 are maintained while the pressure in the processing chamber 80 is kept constant.
By closing 21, indoor air conditioning is stopped.
Then, the door for entry and exit of the workers is laid out to seal the processing chamber.

(B) Fumigation work After the above preparation work, fumigation work is performed. That is, when "start fumigation" is selected by an operation panel or a computer provided in the central monitoring room or the like, the third and fourth fumigations are started.
Are closed, and the electric heater of the formaldehyde generator 101 and the motor of the circulation fan 102 are energized. Then, formaldehyde fumigation gas is generated in the formaldehyde generator 101, and this gas is sent out by the circulation fan 102, and is sent through the formaldehyde delivery pipe 103, the first unit side connection port 92, and the first processing chamber side connection port 86. After flowing into the processing chamber 80, sterilization processing in the chamber is started. The amount of formaldehyde fumigation gas to be delivered is adjusted by controlling the flow rate control valve 108 provided in the formaldehyde delivery pipe 103.

(C) Formaldehyde Decomposition Work Subsequently, the “start of formaldehyde decomposition step” is performed by an operation panel, a computer, or the like provided in a central monitoring room or the like.
Is selected, the first and second electric butterfly valves 10
4 and 107 are closed, the third and fourth electric butterfly valves 111 and 115 and the electric butterfly valve 121 are opened, the drive motor of the blower 114 is energized, and the formaldehyde provided on the ceiling of the processing chamber 80 is opened. Exhaust port 12
The configuration is such that the air in the processing chamber 80 flows into the formaldehyde decomposition processing unit 110 via the duct 0 and the duct 122.

The formaldehyde decomposition section 11
The formaldehyde contained in the air in the processing chamber 80 is decomposed by the catalyst 112 provided in the processing chamber 80, and the air having undergone the decomposition process passes through the HEPA filter 113 and the first and second unit side connection ports 92 and 93. Through the processing chamber 80.

(D) Return operation to normal operation As described above, the decomposition treatment of the formaldehyde fumigation gas in the processing chamber 80 proceeds, and the formaldehyde concentration meter 1
06, it is confirmed that the formaldehyde fumigation gas in the processing chamber 80 has been completely decomposed, and then the air conditioner, the airtight damper 83 for exhaust and the airtight damper 84 for air supply are controlled, so that the chamber pressure is kept constant. Returning to normal operation is performed while being maintained.

[6-3. Effect of the Sixth Embodiment] In the formaldehyde generating / decomposing apparatus of the present embodiment, not only the same effects as in the fifth embodiment can be obtained, but also the gas flow path to the formaldehyde decomposition processing section 110 is provided in the processing chamber 80. Formaldehyde exhaust port 120 on the ceiling
The connection switching between the formaldehyde generating unit 100 and the formaldehyde decomposing unit 110 is further facilitated.

[7. Other Embodiments] The present invention is not limited to the above-described embodiments, and the shape, size, number, material, type, arrangement, and the like of each member can be appropriately changed. For example, the formaldehyde generating unit and the formaldehyde decomposing unit in the formaldehyde generating / decomposing apparatus have a large output and a large capacity, and a large number of unit side connection ports are provided to simultaneously perform fumigation work and formaldehyde decomposing work on a large number of processing chambers. It is also possible. Conversely, a plurality of units can be combined according to the size of the room and the required disassembly speed by using the small-sized unit having the same capacity in the first aspect.

[0089]

As described above, according to the present invention,
It is possible to provide a formaldehyde decomposing apparatus that does not need to heat the gas to be treated or the catalyst. Further, it is possible to provide an air conditioner provided with a formaldehyde decomposition catalyst that does not require heating the gas to be treated or the catalyst. Furthermore, it is possible to provide a formaldehyde generating device and a fumigation system including a decomposition device capable of generating formaldehyde gas and decomposing formaldehyde without heating a gas to be treated or a catalyst, and a formaldehyde generation / decomposition device.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a formaldehyde decomposition apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing the configuration of an air conditioner provided with a formaldehyde decomposition catalyst according to a second embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a fumigation system including a formaldehyde generator and a dedicated decomposition device according to a third embodiment of the present invention, wherein (A) is during fumigation treatment, and (B) is decomposition of formaldehyde. Schematic showing processing

FIG. 4 is a schematic diagram showing a configuration of a formaldehyde generating / decomposing apparatus (indoor installation type) according to a fourth embodiment of the present invention.

5A and 5B are diagrams showing a configuration of a formaldehyde generating / decomposing apparatus (outdoor installation type) according to a fifth embodiment of the present invention, wherein FIG. 5A is a schematic diagram showing the configuration of a formaldehyde generating / decomposing apparatus, and FIG. ) Is a schematic diagram showing the formaldehyde generator / decomposer installed in the corridor of the processing room

FIG. 6 is a view showing a configuration of a formaldehyde generating / decomposing apparatus (outdoor type) according to a sixth embodiment of the present invention, wherein (A) is a schematic diagram showing the configuration of a formaldehyde generating / decomposing apparatus, ) Is a schematic diagram showing the formaldehyde generator / decomposer installed in the corridor of the processing room

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Blower 2 ... Diffusion plate 3 ... Catalyst 4 ... HEPA filter or medium performance filter 7 ... Heat-tight shutter 12 ... Catalyst 13 ... HEPA filter or medium performance filter 14 ... Blower 15,16 ... Intake port 17 ... Exhaust port 18 ... Blow port 18a, 19a, 20a, 22a, 24, 26 ... Hermetic dampers 19, 21, 22, 25 ... Duct 23 ... Formaldehyde generator 27 ... Exhaust fan 31 ... Blast port 32 ... Suction port 33 ... Formaldehyde generator 34 ... Formaldehyde decomposer 35, 36, 38, 39, 40, 46, 47, 50, 5
1, 52 airtight dampers 37, 42, 43, 44, 45, 48, 49 duct 41 air blower 61 air blower 62, 63, 64, 74 airtight shutter 65 formalin tank 66 formaldehyde generating container 67 pipe 68 ... Electric valve 69 ... Heater 71 ... Catalyst 72 ... HEPA filter or medium performance filter 73 ... Formaldehyde concentration meter 80 ... Processing chamber 81 ... Exhaust port 82 ... Intake port 83,84 ... Airtight damper 85 ... Airflow sensor 86,87 ... Processing chamber Side connection port 90: formaldehyde generation / decomposition device 91: caster 92, 93: unit side connection port 100: formaldehyde generation unit 101: formaldehyde generation device 102: circulation fan 103: formaldehyde delivery pipe 104, 107, 111, 115: electric butterfly Valve 10 ... intake pipe 106 ... formaldehyde concentration meter 108 ... flow control valve 110 ... formaldehyde decomposing section 112 ... catalyst 113 ... HEPA filter or medium performance filters 114 ... blower 120 ... formaldehyde outlet 121 ... electric butterfly valve 122 ... ducts 123 ... hose

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazunori Takahashi 2-3-6 Minami-Aoyama, Minato-ku, Tokyo F-term 4C058 AA23 BB07 CC03 CC04 DD07 DD13 JJ13 JJ29 4C080 AA07 BB02 CC02 HH05 KK08 MM07 QQ17 4D048 AA19 AB03 BA30X CC38 CC40 CD05 CD10

Claims (4)

[Claims] 1. A gas supply port for introducing a gas to be treated into an apparatus, a blower for sucking and sending the gas to be treated, a catalyst for decomposing formaldehyde, and discharging the gas after the decomposing process. A gas discharge port disposed in a flow path of the gas to be treated, and performing a decomposition treatment of formaldehyde by repeatedly circulating the gas to be treated in the apparatus. 2. An air conditioner having a heat exchange means, a blowing means, an intake port and an exhaust port is provided with a catalyst for decomposing formaldehyde, and this air conditioner is connected to a room to be treated, and A bypass is provided for the air conditioner, and the damper provided between the air conditioner and the room to be processed and the degree of opening and closing of the damper provided in the bypass route are changed between the initial stage and the later stage of the disassembly process. An air conditioner comprising a catalyst for decomposing formaldehyde. 3. A predetermined formaldehyde generator, and a formaldehyde decomposer provided with a formaldehyde decomposing catalyst separately formed from the formaldehyde generator, wherein the formaldehyde generator is connected to a room to be treated and the formaldehyde is decomposed. A first bypass path for bypassing the generator and a second bypass path for bypassing the formaldehyde decomposition apparatus are provided. In the case of performing fumigation treatment, the first and second bypass paths are provided. When the formaldehyde generator is actuated by closing the damper and the formaldehyde is decomposed, the path passing through the formaldehyde generator is closed, and the dampers provided in the first and second bypass paths are provided. By opening the formaldehyde decomposition equipment A fumigation system comprising a formaldehyde generator and a decomposer, wherein the system is configured to operate. 4. A blower is housed in the first unit,
The second unit is provided with a formaldehyde generating unit, the third unit is provided with a formaldehyde decomposing unit equipped with a formaldehyde decomposing catalyst, between the first unit and the second unit, and between the first unit and the first unit. An openable and closable sealing member is provided between the first unit and the third unit. When fumigation is performed, the sealing member provided between the first and third units is closed. When the first unit and the second unit are communicated with each other and only the formaldehyde generating unit is operated to perform a formaldehyde decomposition treatment, the first unit is used.
A sealing member provided between the first unit and the second unit is closed, the first unit and the third unit are communicated with each other, and only the formaldehyde decomposition processing unit is operated. Formaldehyde generation and decomposition equipment.