JP2004357775A - Ozone sterilization system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ozone sterilization system for sterilizing air using an ozone which has high sterilizing power by efficiently utilizing sterilizing power of ozone. <P>SOLUTION: A supplying port 3 of ozone air, an antibacterial filter 4, an electrostatic filter 5, a HEPA filter 6, an ultraviolet light generator 7, an active carbon filter 8, and an ozonolysis promoter 9 are successively arranged from an uppermost stream side of an air flow path 1. With this configuration, suspended matters on which microbes adhere are captured by the filters 4, 5, 6 to perform positive ozone sterilization and multiplication-sterilization by ultra-violet light and excessive ozone is performed by the generator 7 on a downstream side, this is deodorized by the filter 8, and the excessive ozone is decomposed to sterilize the air and remove dust. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention belongs to the technical field of an ozone sterilization system that sterilizes air using ozone.
[0002]
[Prior art]
In general, some microorganisms (bacteria (bacteria), rickettsias, viruses, etc.) are alive for several hours even if left in the air and several days for long ones. Although many of them may float in the air, many of them adhere to or are trapped in various airborne substances such as dust and float, and these are directly inhaled by breathing or the like or indirectly attached to the skin or clothing through the body. To infect and become infected.
By the way, it is known that ozone (O ₃ ) has a strong sterilizing ability, and it has been attempted to perform air sterilization using ozone there. As such, there is known an ozone sterilizer which generates ozone in an air flow path, sterilizes inflow air with the generated ozone, and decomposes and discharges excess ozone.
Among such ozone sterilizers, there is one in which an ozone generator, an ozone decomposer, and an ultraviolet generator are sequentially arranged from the upstream side of an air flow path (Patent Document 1). By the way, many microorganisms in the air are attached to or incorporated into suspended matter such as dust floating in the air as described above, and when such air is supplied to the ozone sterilizer, the suspended matter is Although the microorganisms will be discharged from the apparatus without being removed, the microorganisms adhering to or taken in by the suspended matter will be discharged without being sterilized because the suspended matter acts as a cover and has a low sterilizing effect. There's a problem. Therefore, there is a filter in which a filter and an ozone generating means are sequentially arranged from the upstream side of an air flow path, and air from which suspended matter is removed by the filter is sterilized with ozone (Patent Document 2).
[0003]
[Patent Document 1]
JP-A-6-225929 [Patent Document 2]
JP-A-9-173762
[Problems to be solved by the invention]
In Patent Document 2, although the effect of removing suspended matter can be expected, since the filter itself is disposed upstream of the ozone generating means, the microorganisms adhering to the filter are actively sterilized by ozone. Without waiting, he would have to wait for death with the filter attached.
By the way, today, the epidemic of dangerous diseases with high infectivity and high mortality such as new type pneumonia caused by coronavirus (SARS: severe acute respiratory syndrome) has become a major problem. When used in an environment where dangerous microorganisms are present, there is a risk that dangerous microorganisms may be attached to the filter, and in order to replace such a filter, carefully filter the filter in advance so that there is no secondary infection. In order to prevent secondary infection, it is necessary to take thorough countermeasures such as disinfection, and it is difficult to cope with secondary infection. There is.
[0005]
[Means for Solving the Problems]
The present invention has been made to solve these problems in view of the above-described circumstances, and the invention of claim 1 is an air sterilization system using ozone, wherein an air flow path is provided. An ozone supply means for supplying ozone, a filter for removing suspended matter in air supplied with ozone, and an ozone decomposition means for decomposing ozone in air between the inlet and the discharge port of the ozone. It is an ozone sterilization system characterized by being arranged. By doing so, the suspended matter adhering to the filter is also exposed to ozone and is positively sterilized, thereby reducing the risk of infection when replacing the filter.
The invention of claim 2 is the ozone sterilization system according to claim 1, wherein the filter is a high-efficiency particle removal filter, and fine suspended matter can be removed by doing so.
The invention according to claim 3 is the ozone sterilization system according to claim 2, wherein at least one of an antibacterial filter and an electrostatic filter is disposed between the ozone supply position and the high-efficiency particle removal filter. By doing so, early clogging of the hepafilter can be avoided.
The invention of claim 4 is the ozone sterilization system according to claim 1, 2 or 3, wherein an ultraviolet ray generating means is disposed downstream of the filter. It is possible to exhibit a high sterilizing effect in cooperation with ultraviolet rays.
The invention of claim 5 is the ozone sterilization system according to claim 4, wherein the ozone decomposing means is provided downstream of the ultraviolet ray generating means. Even if harmful ozone is not contained or slightly contained, it can be discharged in a harmless state.
The invention according to claim 6 is the ozone sterilization system according to claim 4 or 5, wherein an activated carbon filter is disposed downstream of the ultraviolet ray generating means, and thus, a further sterilization effect is obtained. Can be achieved.
The invention according to claim 7 is the ozone sterilization system according to any one of claims 1 to 6, wherein the ozone sterilization system is contained in a casing to form an ozone sterilization apparatus. However, a sterilizer having a high sterilizing effect can be provided. The invention according to claim 8 is characterized in that an air discharge port of an air shower of an air circulation type dust removing chamber provided at an entrance or a passage in a building or a room serves as a discharge port of an air flow path, and an air discharge port of the dust removal chamber forms an air flow path. The ozone disinfection system according to any one of claims 1 to 6, wherein the system is provided so as to serve as an inflow port of the ozone. In removing airborne foreign substances such as dust adhering to clothes, skin, hair, etc., the removed foreign substances can be sterilized.
The invention according to claim 9 is provided so that an air inlet of an air circulation type room having a high dust removal rate serves as an outlet of an air passage, and an air outlet of the room serves as an inlet of an air passage. The ozone disinfection system according to any one of claims 1 to 6, wherein air supplied to a room having a high dust removal rate is supplied with a high disinfection effect. Can be done.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the basic concept of the ozone sterilization system of the present invention. Here, reference numeral 1 denotes an air flow path in which an inflow port 1a into which indoor and outdoor air flows is formed on the upstream side of the flow path. The passage 1 is provided with an ozone supply port 3 to which the ozone-containing air generated by the ozone generator 2 is supplied at the most upstream side of the passage, and a coarse antibacterial filter having a mesh having an antibacterial function is provided downstream thereof. 4. An electrostatic filter 5 having a fine mesh for adhering a charged substance and a high-efficiency particle removal filter 6 are sequentially provided. Further, an ultraviolet ray generator 7 for generating ultraviolet rays having a wavelength of 254 nm (nanometers) is disposed downstream of the high-efficiency particle removal filter 6, and the ultraviolet ray generator 7 is not corroded (oxidized) by the ozone. A corrosive portion (for example, a base portion of an ultraviolet lamp) is coated with an ozone-resistant member (for example, fluororesin).
Incidentally, as the high-efficiency particle removal filter 6, a dust collection filter for removing submicron particles is preferable. As such a dust collection filter, a hepa filter (HEPA: High Efficiency Air Filter; 0.3 μm (micrometer)) is used. A filter having an ability to remove 99.7% or more of particles) and an ULPA filter (ULPA: Ultra Low Penetration Air Filter; a filter having an ability to remove 0.1 μm or more of 99.999% of particles). Can be.
[0007]
An activated carbon filter 8 and an ozone decomposition catalyst 9 are further disposed in sequence on the downstream side of the ultraviolet ray generator 7, and the air ozone decomposed by the ozone decomposition catalyst 9 is discharged from the outlet 1b. . Incidentally, the activated carbon filter 8 is for removing an air mixture such as gas which could not be removed by the filters 4, 5, and 6, and may be disposed after the ozone decomposition catalyst 9.
Although the blower fan is not shown in FIG. 1, it is needless to say that the blower fan is provided at an appropriate position in the air flow path if necessary. It is preferably provided on the side or downstream of the ozone decomposition catalyst 9.
As the ozone generator, a commonly known one such as an ultraviolet ray system and a silent discharge system can be employed.
[0008]
In the embodiment of the present invention configured as described above, the air supplied to the air flow path 1 for ozone sterilization is first supplied with ozone on the most upstream side to become ozone-mixed air, and this ozone-mixed air is filtered. After passing through 4, 5, and 6, suspended matter in the air is attached and removed. The suspended matter adhering to the filters 4, 5, and 6 is exposed to the ozone-containing air and receives an active sterilization function, and the microorganisms adhered to or incorporated into the adhered suspended matter. Is promoted.
[0009]
In addition, the antibacterial filter 4 removes suspended matter having an antibacterial effect, the electrostatic filter 5 removes suspended matter electrostatically, and the high-efficiency particle removal filter 6 removes suspended matter equivalent to a clean room. Since the function of removing suspended matter is exhibited, a high degree of suspended matter can be removed, and the microorganisms adhered to or incorporated into the suspended matter adhered to these filters 4, 5, and 6 have a sterilizing effect of ozone. I will receive it positively. As a result, even if the microorganisms adhere to the filters 4, 5, and 6, or the suspended matter that has been taken in adheres to the filters, the microorganisms to which the microorganisms adhere will die early, and the filters 4, 5, and 6 are replaced. Can reduce microbial infection.
[0010]
Moreover, the air that has undergone the advanced removal of suspended matter is sterilized by receiving ultraviolet rays generated from the ultraviolet ray generator 7, but since the air contains excess ozone, the synergistic effect of the ultraviolet rays and ozone is obtained. As a result, a higher germicidal effect is exhibited.
[0011]
The highly sterilized air passes through the activated carbon filter 8 and is further treated with the suspended solids to form a clean air in which odorous gas and the like that cannot be removed by the filters 4, 5, and 6 are absorbed. Then, the excess ozone contained therein is decomposed by the ozone decomposition catalyst 9 to be detoxified air and discharged from the outlet 1b. In this case, surplus ozone may be decomposed in a state in which ozone is not more than the concentration specified by the environmental standard, and in such a case, it can be discharged as clean air peculiar to ozone.
[0012]
The ozone sterilization system can be housed in a casing to form an ozone sterilization apparatus. That is, as shown in FIG. 2, an air flow path 1 having an inlet 1 a and an outlet 1 b formed in a casing 10 is formed, and the ozone generator 2 is formed in the air flow path 1 from the inlet 1 a side. Filters 4, 5, 6, an ultraviolet ray generator 7, a filter 8, an ozone decomposition catalyst 9, and a fan 11 are sequentially provided, and air is caused to flow from an inlet 1a to an outlet 1b by a blast generated by driving the fan 11. , Advanced dust removal and sterilization can be performed.
[0013]
3 and 4 show an example in which the ozone disinfection system is used in an air circulation type dust removal chamber 12 provided at an entrance or a passage in a building or a room. In this case, an entrance and an exit through which a person passes are separately provided, and a dust removal chamber (sterilization chamber) 12 is provided at each of the exit and the entrance to eliminate the introduction and removal of microorganisms. May be provided only in the direction of moving from the to the non-contaminated side. If an extraneous matter such as dust adhering to clothes, skin, hair, etc. is removed by taking an air shower in the dust removing chamber 12, the removed extraneous matter can be sterilized.
[0014]
The dust removing chamber 12 has an air discharge port 13 for an air shower in a ceiling 12a (may be provided on a side wall), and the discharge port 13 communicates with a discharge port 1b of the air flow path 1 while a floor section. An air discharge port 14 provided in 12b serves as an inlet 1a of the air flow path 1. Automatic doors 15 and 16 are provided at the entrance and the exit of the dust removal chamber 12, respectively. When a person who tries to pass through the dust removal chamber 12 approaches the entrance, the entrance side door 15 automatically opens and closes to allow a person to enter. When a person enters, an air shower is activated to discharge air and blow off and remove attached matter such as dust attached to clothes, skin, and hair. The removed deposits are discharged from the air discharge port 14 of the dust removal chamber 12, and are subjected to dust removal and sterilization by passing through the ozone sterilization system. This dust removal is performed for a preset time (for example, 2 minutes), and after the lapse of the time, the air shower is stopped and the outlet side door 16 is automatically opened. You will not be able to get in and out unless you receive it.
[0015]
Incidentally, the present invention can also be implemented by providing such a dust removing chamber 12 at the entrance of the spare chamber 17 as shown in FIG. The spare room 17 is a room provided for moving from the contaminated side to the non-contaminated side, and only the person who has received the air shower can enter the spare room 17; In the preparatory room 17, there is a water tap 18 for supplying water containing ozone, where the hand and face can be washed and gargled. You can move to. It is more preferable that the preparatory chamber 17 has a negative pressure with respect to the non-contaminated side, and if the ozone disinfection device 18 housed in the casing is provided in the preparatory chamber 17, dust in the preparatory chamber 17 itself is removed. It is convenient because it can be sterilized.
[0016]
FIG. 6 shows an example in which the ozone sterilization system of the present invention is used in an air circulation type room (clean room) 19 having a high dust removal rate. In this example, an air inlet 20 formed in a ceiling 19a is provided. The outlet 1b of the air passage 1 is provided, and the air outlet 21 formed in the floor 19b is provided so as to serve as an inlet of the air passage 1. By operating the ozone sterilization system, a clean room in which dust removal and sterilization are highly performed can be achieved.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view of an ozone sterilization system.
FIG. 2 is a schematic sectional view of an ozone sterilizer.
FIG. 3 is a cross-sectional plan view of a dust removal chamber.
FIG. 4 is a vertical sectional view of a dust removing chamber.
FIG. 5 is a plan sectional view of a preliminary chamber.
FIG. 6 is a vertical sectional view of a clean room.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air flow path 2 Ozone generator 3 Ozone-containing air supply port 4 Antibacterial filter 5 Electrostatic filter 6 High-efficiency particle removal filter 7 Ultraviolet generator 8 Activated carbon filter 9 Ozone decomposition catalyst 10 Casing 11 Fan 12 Dedusting chamber 19 Clean room

Claims (9)

An air sterilization system using ozone, between an inlet and an outlet of an air flow path, ozone supply means for supplying ozone, a filter for removing suspended matter in the air supplied with the ozone, An ozone sterilization system characterized by sequentially disposing ozone decomposing means for decomposing ozone in air from an upstream side. The ozone sterilization system according to claim 1, wherein the filter is a high-efficiency particle removal filter. The ozone sterilization system according to claim 2, wherein at least one of an antibacterial filter and an electrostatic filter is disposed between the ozone supply position and the high-efficiency removal filter. 4. The ozone sterilization system according to claim 1, wherein an ultraviolet ray generating means is provided downstream of the filter. 5. The ozone sterilization system according to claim 4, wherein an ozone decomposing means is provided downstream of the ultraviolet ray generating means. The ozone sterilization system according to claim 4 or 5, wherein an activated carbon filter is disposed downstream of the ultraviolet ray generating means. The ozone sterilization system according to any one of claims 1 to 6, wherein the system is contained in a casing to constitute an ozone sterilization apparatus. The air discharge port of the air shower of the air circulation type dust removal chamber provided at the entrance or the entrance or the passage in the building or room becomes the discharge port of the air flow path, and the air discharge port of the dust removal chamber becomes the flow port of the air flow path. The ozone sterilization system according to claim 1, wherein the ozone sterilization system is provided. The air inlet of the air circulation type room having a high dust removal rate serves as an outlet of the air passage, and the air outlet of the room serves as the inlet of the air passage. Item 9. The ozone sterilization system according to any one of Items 1 to 6.

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