JP2017136191A - Ozone gas sterilizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ozone gas sterilizer where an ozone gas is released to the whole of a space at a fixed concentration, and also, the ozone gas is not released so as to exceed an intended concentration.SOLUTION: Provided is an ozone gas sterilizer installed in a prescribed space and sterilizing the space, comprising: one or more suction ports and exhaust ports equipped to the outer surface of the enclosure of the ozone gas sterilizer and performing communication at the inside of the enclosure; and an ozone gas generator provided between the suction ports(s) and the exhaust port(s); and an ozone gas decomposition filter provided between the suction port(s) and the ozone gas generator.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an apparatus for disinfecting by releasing ozone gas.

  Conventional sterilization such as sterilization of microorganisms and inactivation of viruses during routine disinfection in operating rooms, replacement of animals in animal experiment facilities, switching of manufactured drugs in pharmaceutical manufacturing facilities, and switching of cultures in regenerative medical facilities The method of filling the room with formaldehyde and sterilizing the entire surface of the room has been used. However, formaldehyde has recently been pointed out to affect the human body, such as carcinogenicity.

  As an alternative sterilization method using other than formaldehyde, a method using ozone, peracetic acid-based disinfectant, chlorine dioxide or hydrogen peroxide has been proposed. Of these, ozone has a strong oxidizing power and has functions such as sterilization and sterilization. Therefore, ozone is used in a wide range of fields including water purification plants. It has come to be used in such as.

  The conventional ozone gas disinfector for disinfection by ozone gas fumigation is an ozone gas generator that maintains the ozone concentration in the re-inhaled air containing ozone gas after spatial circulation in order to increase the ozone concentration in the air and ensure the disinfection capacity. By letting it pass through, air containing a higher concentration of ozone gas is re-released into the space. Patent Document 1 discloses a process in which disinfection is performed in a shorter time in a space such as a medical facility, and ozone gas after disinfection is decomposed and removed using a unit for decomposing ozone gas provided separately from an ozone gas generator. A system is disclosed.

  However, ozone gas is also toxic, and humans feel the odor of ozone at about 0.01-0.02 ppm, irritation of the nose from about 0.1 ppm, and vision loss at 0.2-0.5 ppm, Upper respiratory tract irritation at 0.4-0.5 ppm, chest pain at 0.6-0.8 ppm, cough, fatigue at 1-2 ppm, headache, head weight, changes in respiratory function, respiratory distress at 5-10 ppm, increased pulse Therefore, work environment standards (Japan Society for Occupational Health, permissible concentration 0.1 ppm [workers are 8 hours a day, 40 hours a week, hazardous substances with low physical labor intensity] If the average exposure concentration of the hazardous substance is less than this value, the concentration is considered to have no adverse health effects on almost all workers], the proposed year 1963), Indoor ring Boundary standard (0.05 ppm [24 h maximum allowable concentration, United States Food and Drug Administration (FDA), 1992]); maximum 0.1 ppm, average 0.05 ppm [allowable concentration of indoor gas due to equipment generating ozone], design standard, Provisional (1967), Japan Air Cleaners Association), etc. are established. In addition, ozone is widely used in home appliances such as air conditioners and refrigerators, but safety is also taken into consideration, and the structure is such that ozone does not leak into the room. Even when it leaks, it is designed to be 0.05 ppm or less (Non-Patent Document 1).

Special table 2012-531979 gazette

Incorporated administrative agency National Life Center "safety of household ozone gas generator" August 27, 2009

  While the conventional ozone gas disinfector can increase the ozone concentration in the space, it is difficult to adjust the ozone concentration in terms of time and space, and the ozone concentration in the space is unstable. For example, when disinfecting one room in a medical facility or the like, it has been difficult for the conventional ozone gas disinfector to maintain the ozone concentration during disinfection constant over the disinfection period. In addition, there is a problem that the concentration of ozone gas varies depending on the position in the room where sterilization is performed, such as the four corners of the room, the ceiling and the floor, the vicinity of the ozone gas disinfectant, and the distant place. Furthermore, ozone gas is toxic to the human body, and if a problem occurs in the ozone gas disinfector, ozone gas is generated outside the intended disinfection time, or the ozone concentration in the air becomes higher than necessary. There was a risk of adversely affecting

  In recent years, opportunistic causes caused by contamination with Pseudomonas aeruginosa and MRSA (Methicillin-resistant Staphylococcus aureus) in medical facilities such as hospitals, clinics, clinics, nursing and welfare facilities. Not only infectious diseases, 2002 SARS (Severe Acute Respiratory Syndrome), 2009 New Influenza, 2014 Ebola hemorrhagic fever, 2015 MERS (Middle East respiratory syndrome) In the case of a pandemic of infection by new or unknown microorganisms or viruses, etc., not only the above medical facilities, but also public transportation such as railway vehicles or aircraft cabins and / or waiting rooms, etc. Inside, school, government offices, public facilities such as libraries, etc. In Mana space, there is a possibility that the or cause sudden need for thorough disinfection.

  In addition, not only in operating rooms, but when used in other places in medical facilities, nursing / welfare facilities, public transportation, public facilities, etc., it is necessary to move the ozone gas disinfector to a place to be disinfected. For this reason, the structure is preferably movable and compact.

  That is, the subject of this invention is providing the ozone disinfector which can discharge | release ozone gas so that it may become a fixed density | concentration over the whole space.

  In the ozone gas disinfection device, the present inventors have found that the above problem can be solved by arranging an ozone gas decomposition filter upstream of the ozone gas generator while further studying to solve the above problem, and further research. As a result, the present invention has been completed. Hereinafter, “ozone gas disinfector” and “ozone gas disinfection device”, and “ozone gas decomposition filter” and “ozone gas decomposition catalyst filter” are used interchangeably.

That is, the present invention relates to:
(A) an ozone gas disinfecting device installed in a predetermined space and disinfecting the space,
One or more intake and exhaust ports provided on the outer surface of the housing of the ozone gas disinfection device and communicating with each other inside the housing;
The ozone gas disinfecting apparatus comprising an ozone gas generator provided between the intake port and the exhaust port, and an ozone gas decomposition filter provided between the intake port and the ozone gas generator.
(B) The ozone gas disinfecting apparatus according to (a), wherein the ozone gas generator is of an ultraviolet type.
(C) The ozone gas disinfection device according to (a) or (b), wherein the ozone gas decomposition filter includes an ozone decomposition metal catalyst.
(D) The ozone gas disinfection device according to any one of (a) to (c), wherein an ozone gas decomposition efficiency of the ozone gas decomposition filter with respect to air having an ozone concentration of 2 ppm is 70% or more.
(E) The ozone gas disinfection device according to any one of (a) to (d), comprising one or more dust filters upstream and / or downstream of the ozone gas generator.
(F) The ozone gas disinfection device according to (e), wherein the dust removal filter is a HEPA filter.
(G) The ozone gas disinfecting apparatus according to any one of (a) to (f), comprising an air blowing unit for circulating the ozone gas generated from the ozone gas generator in the space.

  The ozone gas disinfection device of the present invention realizes a compact size that is convenient for discharging and moving ozone gas to a constant concentration throughout the space without releasing the ozone concentration beyond the intended concentration. Therefore, it is possible to realize safe and safe disinfection with ozone gas at any desired place.

For a more detailed understanding of the present invention, reference is made to the following drawings.
FIG. 1 is a schematic block diagram of an ozone gas disinfection apparatus according to an aspect of the present invention. FIG. 2 is a diagram showing the arrangement of the ozone gas generator and the ozone gas decomposition filter of FIG. FIG. 3 is a block diagram illustrating sampling positions in the room 1 according to the first embodiment. FIG. 4 is a graph showing changes in ozone concentration in Example 1. FIG. 5 is a graph showing changes in ozone concentration in Example 2. FIG. 6 is a graph showing changes in ozone concentration in Example 3. FIG. 7 is a graph showing changes in ozone concentration in Example 4. FIG. 8 is a graph showing changes in ozone concentration in Example 5.

  The present invention relates to an ozone gas disinfecting apparatus that is installed in a predetermined space and disinfects the space. In a specific aspect, the ozone gas disinfecting apparatus is provided on the outer surface of the casing of the ozone gas disinfecting apparatus, and communicates within the casing. One or two or more intake ports and exhaust ports, the intake port and the An ozone gas generator provided between the exhaust ports and an ozone gas decomposition filter provided between the intake port and the ozone gas generator are included. In preferred embodiments, substantially all of the air from the one or more inlets, eg, 80%, 90%, 95%, 98%, 99.5%, 99.9%, most preferably all air. Passes through the ozone gas decomposition filter. Further, in a preferred embodiment, the apparatus of the present invention does not include an additional unit for decomposing ozone gas as in Patent Document 1 and / or does not have a switching mechanism for switching the air flow by opening and closing at the intake port. Due to its simple mechanism, the device of the present invention can achieve a portable and compact size.

  In another embodiment of the present invention, the ozone gas generator may employ an ultraviolet system, a discharge system, or any other ozone generation system, but preferably uses an ultraviolet system. The discharge method is a method in which ozone is generated from oxygen by discharge, and ozone gas having a high concentration can be generated. However, it is susceptible to environmental influences such as temperature and humidity, and toxic nitrogen oxides can be generated, and the size of the ozone gas generator becomes relatively large. On the other hand, the ultraviolet ray method is a method of generating ozone by exposing oxygen to ultraviolet rays having a wavelength of 180 nm, and is not easily affected by the environment such as temperature and humidity, and does not generate toxic nitrogen oxides. If an ultraviolet ozone gas generator with a relatively low ozone gas production capacity is used, or if an ozone gas decomposition filter is provided upstream of the ozone gas generator, it may not be possible to achieve a sufficient concentration of ozone gas in the air from the exhaust port. Surprisingly, however, as demonstrated in the examples below, the device of the present invention is able to maintain an ozone concentration suitable for disinfection and the concentration is not excessively high.

  In another aspect of the present invention, in the ozone gas disinfecting apparatus, the ozone gas decomposition filter includes an ozone decomposition metal catalyst. The decomposition catalyst in the ozone gas decomposition catalyst filter may be a metal catalyst, activated carbon, or other material, but preferably contains an ozone decomposition metal catalyst as the decomposition catalyst, and the decomposition catalyst substantially consists of an ozone decomposition metal catalyst, For example, the ozone decomposition catalyst contains 70% or more, 85% or more, 95% or more, 98% or more, 99.5% or more, or 99.9% or more of the ozone decomposition metal catalyst. Preferably, most preferably the ozonolysis catalyst consists entirely of an ozonolysis metal catalyst. The ozone gas decomposition catalyst filter may be manufactured in a felt shape. Furthermore, the ozone gas decomposition catalyst filter may be manufactured with a honeycomb structure.

  The ozone decomposition efficiency of the ozone gas decomposition filter, that is, the ratio of the ozone concentration in the air after passing through the filter to the ozone concentration in the air before passing through the filter varies depending on the ozone concentration before passing through the filter, and generally the ozone concentration before passing through the filter. However, in another embodiment of the present invention, the ozone gas decomposition filter has a decomposition efficiency of 70% or more, preferably 80% or more, more preferably 90% with respect to air having an ozone concentration of 2 ppm. Above, most preferably 95% or more. When the decomposition efficiency of the ozone gas decomposition filter with respect to air with an ozone concentration of 2 ppm is 95%, the ozone concentration of the air after passing through the ozone gas decomposition filter is 0.1 ppm of the working environment standard.

  In another aspect of the present invention, the ozone gas disinfecting device includes one or more dust filters upstream and / or downstream of the ozone gas generator, and preferably the dust filter is a HEPA filter.

In another aspect of the present invention, the ozone gas disinfection device includes a blower for circulating the ozone gas generated from the ozone gas generator in the space. The air blowing part is preferably provided in an air communication part between the intake port and the exhaust port in the housing, but any one upstream of the ozone gas decomposition filter, downstream of the ozone gas generator, or between the ozone gas decomposition filter and the ozone gas generator. However, it is more preferably provided adjacent to the intake port or the exhaust port. Note that the air blowing section may be provided further upstream of the intake port or further downstream of the exhaust port. There may be one blower, or two or more than three. In the case where two or more air blowing sections are provided, it is preferable that the air inlet, the ozone gas decomposition filter, the ozone gas generator, and the air inlet are disposed at different positions, but two or more are at the same position. It may be arranged. Moreover, the air volume of this ventilation part is 0.1-10 m < ³ > / min, preferably 0.5-5 m < ³ > / min, respectively, more preferably, when two or more ventilation parts are provided. 1 to ³ m ³ / min, most preferably about 2 m ³ / min.

  The ozone gas disinfection device according to the present invention is provided with an ozone gas decomposition filter between the intake port and the ozone gas generator, thereby making it possible to adjust the ozone concentration in the space temporally and spatially, realizing a stable ozone concentration, In the space where disinfection is performed, variation in the concentration of ozone gas depending on the position is prevented. Further, even if a problem occurs in the ozone gas disinfection device, the decomposition filter decomposes the ozone gas that continues to be generated outside the intended disinfection time, thereby reducing adverse effects on the human body and the like.

  The ozone gas disinfection device according to the present invention is basically operated in an unattended closed space. However, the ozone concentration in the air in the space during operation of the device maintains a certain level of safety while maintaining disinfection capability. It is preferable that a mechanism that simultaneously generates ozone and ozonolysis is employed. In this case, due to the stability of the ozone generation concentration and the stability of the ozone gas decomposition filter's decomposition capacity, the ozone concentration rises after a certain time and stops at a point when the ozone generation and the ozone decomposition treatment are balanced. During operation, for example 0.1-10 ppm, preferably 0.5-5 ppm, more preferably 1-3 ppm, even more preferably 1.5-2.5 ppm, most preferably around 2 ppm. It is preferable to maintain the ozone concentration in the air in the space.

The ozone gas disinfection device of the present invention is in a space of an arbitrary volume, for example, in a space of 1 to 1000 m ³ , preferably 10 to 100 m ³ , more preferably 20 to 80 m ³ , most preferably 30 to 60 m ³ . It is preferable that the entire space has an ozone concentration of about 2 ppm in about 2 hours after the start of operation, preferably about 1 hour, and that the ozone gas generator operates in a space where the ozone concentration in the air is about 2 ppm. It is preferable to have the performance of reducing the ozone concentration in the air to 0.1 ppm in about 2 hours, preferably about 1 hour after stopping.

  The ozone gas disinfection apparatus according to the present invention is used in medical facilities such as hospitals, clinics, clinics, nursing care / welfare facilities, especially in the operation room after surgery, and / or in public vehicles such as railway vehicles or airplanes. In the use space and / or waiting room, and other spaces, the floor, walls, tables installed in the space, etc., as well as places where human hands can touch, the ceiling, corners of the space, etc. Can be used to disinfect.

  Hereinafter, a configuration of an ozone gas disinfection device according to one embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

  FIG. 1 shows a schematic block diagram of an ozone gas disinfecting apparatus according to one embodiment of the present invention. In FIG. 1, an ozone gas disinfection device 100 includes a base unit 101, an ozone generation / decomposition unit 102, a display unit 103, and a blower unit 104. The ozone gas disinfection apparatus 100 includes a control power supply unit 110, a control substrate 112, an ozone lamp ballast (lighting power supply) 114, a lighting glow lamp 116, an ozone gas lamp 118, a dust collection prefilter 120, and a dust collection tool. It comprises a HEPA filter 122, an ozone gas decomposition catalyst filter 124, a circulation fan 126, and a power cable 128.

  FIG. 2 shows an ozone gas lamp 118, a dust collection pre-filter 120, a dust collection HEPA filter 122, and an ozone gas decomposition catalyst for the ozone generation / decomposition unit 102 of the ozone gas disinfection apparatus according to the embodiment of the present invention shown in FIG. An example of the arrangement of the filter 124 is shown. In FIG. 2, air flows from left to right. Dust and the like contained in the air flowing in from the left are removed by the dust collection prefilter 120 and the dust collection HEPA filter 122. The arrangement of the filter is not limited to this, and the filter may be placed at another position in relation to the ozone gas lamp 118 and the ozone gas decomposition catalyst filter 124. That is, in another aspect of the present invention, the dust collection pre-filter 120 and the dust collection HEPA filter 122 are separately disposed upstream, between, or downstream of the ozone gas lamp 118 and the ozone gas decomposition catalyst filter 124 with respect to the air flow. However, as shown in FIG. 2, both are preferably arranged upstream of the ozone gas decomposition catalyst filter. As used herein, “upstream” refers to the side of the air flow inlet side inside the ozone gas disinfection device housing and includes further upstream of the air intake port, whereas “downstream” refers to the exhaust port. And further downstream of the exhaust is also included.

  In the air flow, the ozone concentration of the inflowing air is decomposed to a desired concentration by the ozone gas decomposition catalyst filter 124. In one embodiment of the present invention, 70% of the ozone gas contained in the inflowing air is decomposed in the ozone gas decomposition catalyst filter 124, and the ozone concentration of the air after passing through the ozone gas decomposition catalyst filter 124 is reduced to 30%. . In a preferred embodiment of the present invention, 95% of the ozone gas contained in the inflowing air is decomposed by the ozone gas decomposition catalyst filter 124, and the ozone concentration of the air after passing through the ozone gas decomposition catalyst filter 124 is 5%. To reduce. Further, in the air flow, the ozone concentration of the air that has passed through the ozone gas decomposition catalyst filter 124 can rise to a desired concentration in the ozone gas lamp 118.

  In one aspect of the invention, the ozone gas lamp 118 is shown as an ozone gas generator that employs an ultraviolet system. The number of ozone gas lamps 118 may be one, two, or more.

  The operating principle in one embodiment of the present invention is described below.

  Ozone gas is generated when the ozone gas lamp 118 is lit, diffused in the space by the circulation fan 126, and inactivates microorganisms and viruses present on the equipment surface by the oxidation-reduction action of ozone. On the other hand, the ozone gas after circulation in the space is taken into the apparatus by the circulation fan 126 and decomposed by passing through the ozone gas decatalytic filter 124. In addition, airborne bacteria present in the space are captured by the dust collection prefilter 120 and / or the dust collection HEPA filter 122, and are sterilized and disinfected at the same time as ozone gas passes, and are inactivated.

  Hereinafter, the principles of ozone generation and ozonolysis in the ozone gas disinfecting apparatus according to one aspect of the present invention will be described.

As for ozone generation in the ozone gas disinfection apparatus according to one aspect of the present invention, an ultraviolet ray method is adopted among ozone generation methods. The ozone gas lamp 118 generates ultraviolet light having a wavelength of 180 nm, and the ultraviolet light is absorbed by oxygen in the atmosphere to generate excited state oxygen atoms O ( ¹ D) and ground state oxygen atoms O ( ³ P) ( (See equation (1)). Then, the oxygen atom O ( ³ P) in the ground state is combined with oxygen O ₂ to generate ozone O ₃ (see formula (2)).
O ₂ + hv (180 nm) → O ( ¹ D) + O ( ³ P) (1)
O ( ³ P) + O ₂ → O ₃ (2)

Next, regarding ozone decomposition in the ozone gas disinfection apparatus according to one aspect of the present invention, the reaction process by the ozone gas decomposition catalyst filter 124 is as follows. M represents an ozone gas decomposition catalyst.
O ₃ + M → M−O + O ₂ (3)
M−O + O ₃ → M + 2O ₂ (4)

As a result of the reaction of the above formula (3), ozone is decomposed and oxygen molecules and oxygen molecules bonded to the remaining arms of the catalyst (MO) are generated. M-O further reacts with O ₃ to generate two oxygen molecules as shown in formula (4).

  Regarding the microbiological performance of the ozone gas disinfecting apparatus according to one aspect of the present invention, referring to JIS T7328: 2005 4.5 (microbiological performance of the disinfectant) and 5.5 (microbiological performance of the disinfectant), The decrease in the number of survivors in a logical indicator (biological index, hereinafter referred to as “BI”) was measured. BI was an agar plate.

Test method GL-16 type (synthetic quartz ozone lamp), two ozone gas disinfecting apparatuses according to one embodiment of the present invention were used as room 1 (room volume about 30 m ³ ), room 2 (room volume about 60 m ³ ), room 3 (Room volume about 45 m ³ ) was installed near the entrance and operated.

The ozone concentration was measured at three locations: the device outlet, the back of the room, and the ceiling. However, only the room volume of 60 m ³ was measured for the ceiling. The apparatus air volume was 2 m ³ / min. The target bacteria were the following 4 bacterial species (3 bacterial species excluding E. coli only in Examples 1, 4, and 5).
1) P.I. aeruginosa (NBRC 3080: Pseudomonas aeruginosa)
2) S. aureus (NBRC 12732: MSSA)
3) S.M. aureus (IID 1677: MRSA)
4) E.E. E. coli (NBRC 3972: E. coli)

The bacterial cells suspended in sterilized water were diluted undiluted and 10-fold, and 0.1 ml of the bacterial solution was dropped onto an agar medium and smeared (10 ⁷ to 10 ⁸ / plate). The agar medium was overlaid with trypsoy agar medium after treatment, and the number of viable cells after culturing at 35 ° C. for 48 hours was measured. As a control, a plate placed in a normal space adjacent to the space where the ozone gas disinfection device was installed was cultured in the same manner, and the number of viable bacteria was measured.

The test was performed once for each ozone disinfection mode related to the volume of the room, and the mode 1 (room volume of 10 to 30 m ³ ) was verified three times in total as reproducibility of disinfection. Moreover, it evaluated including reliability evaluation by the total 5 times of Examples 1-5.

In FIG. 3, the sampling position in the room 1 is shown. a indicates the ozone concentration measurement position near the ceiling (2.7 m from the floor). However, only the room volume of 60 m ³ was measured for the ceiling. b shows the ozone concentration measurement position on the upper surface of the work table (1.2 m from the floor surface). c shows the ozone concentration measurement position of an apparatus outlet (about 0.7 m from a floor surface). The ozone concentration measurement was performed using EG-2001R, EG-3000 (both from Ebara Jitsugyo Co., Ltd.), etc., and the number of the treatment (agar plate) processing positions was set to two in [1] to [5].

[Example 1]
Disinfection mode 1 was carried out in room 1 (room volume 30 m ³ ). The transition of ozone concentration is shown in FIG. The bactericidal effect was as shown in the following table (bactericidal efficiency: log (N / N ₀ ), N: number of viable bacteria in each treatment plate, N ₀ : number of viable bacteria in control).

[Example 2]
Disinfection mode 1 was carried out in room 1 (room volume 30 m ³ ). The transition of ozone concentration is shown in FIG. Further, sterilization effect was as follows in Table (sterilization _{efficiency: log (N / N 0)} ).

Example 3
Disinfection mode 1 was carried out in room 1 (room volume 30 m ³ ). The transition of ozone concentration is shown in FIG. Further, sterilization effect was as follows in Table (sterilization _{efficiency: log (N / N 0)} ).

Example 4
Disinfection mode 3 was performed in room 2 (room volume 60 m ³ ). The transition of the ozone concentration is shown in FIG. Further, sterilization effect was as follows in Table (sterilization _{efficiency: log (N / N 0)} ).

Example 5
Disinfection mode 2 was performed in room 3 (room volume 45 m ³ ). The transition of ozone concentration is shown in FIG. Further, sterilization effect was as follows in Table (sterilization _{efficiency: log (N / N 0)} ).

Test results 3 species (4 species at first) were fixed on an agar medium and exposed to ozone. As a result, it was confirmed that the sterilization efficiency was 6 digits or more regardless of the measurement location. In any of the embodiments, the vicinity of the exhaust port of the apparatus is within 30 minutes after the start of the operation of the ozone generator, the corner of the room reaches about 1 hour after the start of the operation, and the ozone concentration reaches about 2 ppm. After that, the almost constant concentration was maintained until the operation was stopped. Further, after the operation was stopped, the ozone concentration was reduced to about 0.1 ppm in the vicinity of the exhaust port of the apparatus, about 30 minutes after the ozone generator stopped, and about 1 hour in the corner of the room.

  As described above, the ozone gas disinfection device of the present invention is a space for disinfection by disposing an ozonolysis filter upstream of the ozone generator and making it a compact size convenient for moving the size. Even if the ozone concentration in the inside is stabilized and the necessity for thorough disinfection suddenly arises, it becomes possible to disinfect by moving the ozone gas disinfection device. Therefore, if the ozone gas disinfection device of the present invention is put into practical use, safe and easy disinfection with ozone gas is realized at any desired place, greatly breaking through the limits of conventional ozone gas disinfection, As a result, it becomes the foundation of rich social development.

DESCRIPTION OF SYMBOLS 100 Ozone gas disinfection apparatus 101 Base part 102 Ozone generation / decomposition part 103 Display part 104 Air blower part 110 Power supply part for control 112 Control board 114 Ozone lamp ballast (power supply for lighting)
116 Glow lamp for lighting 118 Ozone gas lamp 120 Pre-filter for dust collection 122 HEPA filter for dust collection 124 Ozone gas decomposition catalyst filter 126 Fan for circulation 128 Power cable

Claims (7)

An ozone gas disinfection device that is installed in a predetermined space and disinfects the space,
One or more intake and exhaust ports provided on the outer surface of the housing of the ozone gas disinfection device and communicating with each other inside the housing;
The ozone gas disinfecting apparatus comprising an ozone gas generator provided between the intake port and the exhaust port, and an ozone gas decomposition filter provided between the intake port and the ozone gas generator.   The ozone gas disinfection device according to claim 1, wherein the ozone gas generator is of an ultraviolet system.   The ozone gas disinfection device according to claim 1 or 2, wherein the ozone gas decomposition filter includes an ozone decomposition metal catalyst.   The ozone gas disinfection device according to any one of claims 1 to 3, wherein an ozone gas decomposition efficiency of an ozone gas decomposition filter with respect to air having an ozone concentration of 2 ppm is 70% or more.   The ozone gas disinfection device according to any one of claims 1 to 4, further comprising one or more dust removal filters upstream and / or downstream of the ozone gas generator.   The ozone gas disinfection device according to claim 5, wherein the dust removal filter is a HEPA filter.   The ozone gas disinfection device according to any one of claims 1 to 6, further comprising a blower for circulating the ozone gas generated from the ozone gas generator in the space.