WO2023228344A1

WO2023228344A1 - Ozone system and ozone supply method

Info

Publication number: WO2023228344A1
Application number: PCT/JP2022/021506
Authority: WO
Inventors: 芳明有馬; 佳明尾台; 登起子山内
Original assignee: 三菱電機株式会社
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2023-11-30
Also published as: JPWO2023228344A1; JP2023174539A; JP7270853B1

Abstract

An ozone system (100) supplies ozone indoors. The ozone system (100) comprises an ozone generating unit (13) that generates ozone, a humidity measuring unit (14) that measures the indoor humidity, and a control unit that controls the amount of ozone generated by the ozone generating unit (13) on the basis of the indoor humidity measured by the humidity measuring unit (14). This ozone system (100) exhibits the effect that it is possible to provide a user with a comfortable sterilized space in consideration of indoor humidity.

Description

Ozone system and ozone supply method

The present disclosure relates to an ozone system and an ozone supply method that perform sterilization using ozone.

Ozone, which has strong oxidizing power, is used in various fields for purposes such as disinfection, sterilization, deodorization, decolorization, and organic matter removal. In sterilization using ozone, the ozone CT (Concentration-Time Value) value, which is the product of the ozone concentration and the time of exposure to ozone, is set in advance, and ozone generation is stopped when the set ozone CT value is reached. Control is in place to stop it.

Patent Document 1 discloses that when performing control to stop ozone generation when a set ozone CT value is reached, the amount of discoloration or the shade of discoloration of a chemical substance that changes color by reacting with ozone is monitored. discloses a technique for detecting the product of ozone concentration and ozone treatment time.

Japanese Patent Application Publication No. 2007-159820

However, just by controlling the generation of ozone to stop when a preset ozone CT value is reached, as in the technology of Patent Document 1, it is not possible to appropriately control the amount of ozone diffused necessary for sterilizing the space to be ozone treated. A situation may arise.

The present disclosure has been made in view of the above, and aims to provide an ozone system that can provide a user with a comfortable sterilization space while taking indoor humidity into consideration.

In order to solve the above-mentioned problems and achieve the objectives, an ozone system according to the present disclosure is an ozone system that supplies ozone indoors. The ozone system includes an ozone generation section that generates ozone, a humidity measurement section that measures indoor humidity, and controls the amount of ozone generated by the ozone generation section based on the indoor humidity measured by the humidity measurement section. A control unit.

According to the ozone system according to the present disclosure, it is possible to provide a comfortable sterilization space to the user in consideration of indoor humidity.

Schematic diagram showing a configuration example of an ozone system according to Embodiment 1 Block diagram showing an example of functional configuration of the ozone system according to Embodiment 1 Schematic diagram showing a configuration example of a CT value equivalent amount detection section of the ozone system according to Embodiment 1 A schematic diagram showing a configuration example of a gas flow path of an ozone generator of an ozone system according to Embodiment 1. Characteristic diagram showing the relationship between ozone CT value and color difference of ozone indicator in Embodiment 1 Flowchart showing an overview of the operation of the ozone system according to the first embodiment Flowchart showing the procedure of the first example of operation of the ozone system according to the first embodiment Diagram for explaining the concept of the relationship between relative humidity and required ozone CT value in Embodiment 1 A first diagram illustrating the concept of a method for determining ozone generation stop conditions in the ozone system according to the first embodiment. A second diagram illustrating the concept of a method for determining ozone generation stop conditions in the ozone system according to the first embodiment. Third diagram illustrating the concept of a method for determining ozone generation stop conditions in the ozone system according to the first embodiment Flowchart showing the procedure of the second operation example of the ozone system according to the first embodiment Schematic diagram showing a gas flow path formed in the case of the ozone generator of the ozone system according to Embodiment 2 Schematic diagram showing a configuration example of an ozone system according to Embodiment 3 Schematic diagram showing a configuration example of an automatic supply mechanism of an ozone indicator in a CT value equivalent amount detection unit included in the ozone system according to Embodiment 3 Cross-sectional view showing the structure of an ozone indicator sheet in the CT value equivalent amount detection section included in the ozone system according to Embodiment 3 A block diagram showing a functional configuration related to automatic supply of an ozone indicator in a CT value equivalent amount detection unit included in the ozone system according to Embodiment 3. A diagram showing a configuration in which each function of the control unit according to Embodiment 1 to Embodiment 3 is realized by hardware. A diagram showing a configuration in which each function of the control unit according to Embodiment 1 to Embodiment 3 is realized by software.

Below, an ozone system and an ozone supply method according to an embodiment will be described in detail based on the drawings. In addition, in the drawings shown below, for ease of understanding, the scale of each member may be different from the actual scale. The same applies between each drawing.

Embodiment 1.
FIG. 1 is a schematic diagram showing a configuration example of an ozone system 100 according to the first embodiment. FIG. 1 shows a state in which an ozone system 100 is applied to an indoor room 200 that is a space to be treated with ozone. FIG. 2 is a block diagram showing an example of the functional configuration of the ozone system 100 according to the first embodiment. FIG. 3 is a schematic diagram showing a configuration example of the CT value equivalent amount detection section 2 of the ozone system 100 according to the first embodiment. FIG. 4 is a schematic diagram showing a configuration example of the gas flow path 11 of the ozone generator 1 of the ozone system 100 according to the first embodiment. Here, the operation of the ozone system 100 will be explained using a virus as an example, but the objects to be sterilized by the ozone system 100 include microorganisms such as viruses and bacteria.

The ozone system 100 is an ozone sterilization system that sterilizes the indoor room 200 by supplying ozone to the indoor room 200, which is a space to be ozone treated. As shown in FIG. 1, the ozone system 100 includes an ozone generator 1 and a CT value equivalent amount detection section 2. The ozone generator 1 is placed near one wall 203 on the floor 201 of the room 200 . Further, the CT value equivalent amount detection unit 2 is arranged at a corner of the room 200 sandwiched between the ceiling 202 and the other wall 204 in the room 200 . The CT value equivalent amount detection unit 2 is arranged in the room 200 at a position farthest from the ozone generator 1. Thereby, the ozone system 100 can distribute ozone to a location away from the ozone generator 1 within the ozone treatment target space.

The ozone generator 1 generates ozone by inhaling raw material gas containing oxygen, and inactivates viruses in the room 200 by diffusing the generated ozone into the room 200. The ozone generator 1 includes a gas flow path 11 , a blower section 12 , an ozone generator 13 , a humidity measurement section 14 , and a control device 15 . The gas flow path 11 , the blowing section 12 , the ozone generating section 13 , the humidity measuring section 14 , and the control device 15 are provided inside the housing 10 . Note that the humidity measuring section 14 may be provided in the housing 10 at a position facing the outside of the housing 10. The control device 15 includes a storage section 16, a timer 17, a communication section 18, and a system control section 19. Information can be exchanged between each component of the ozone generator 1.

The gas flow path 11 is a flow path through which source gas containing oxygen and ozone generated in the ozone generation section 13 flow. The raw material gas is introduced into the gas flow path 11 from outside the housing 10 . Further, ozone generated in the ozone generator 13 is discharged from the gas flow path 11 to the outside of the housing 10 and diffused into the room.

The raw material gas containing oxygen is a gas that serves as a raw material for ozone generated by the ozone generator 13, and indoor air, which is the air in the room 200 that is the space to be ozonated, is used. Note that the raw material gas containing oxygen is not limited to room air, as long as it contains oxygen. In FIG. 4, arrows 211 indicate the flow of indoor air. In FIG. 4, arrows 212 indicate the flow of ozone and indoor air.

The blower section 12 forms an airflow from an inlet 111 that is one end of the gas flow path 11 to an outlet 112 that is the other end of the gas flow path 11 . By forming an airflow from the suction port 111 toward the discharge port 112 in the gas flow path 11, room air, which is a source gas containing oxygen, is introduced into the gas flow path 11 from the suction port 111.

In addition, by forming an airflow from the suction port 111 toward the discharge port 112 in the gas flow path 11, ozone generated in the ozone generator 13 is mixed with indoor air and flows from the gas flow path 11 to the outside of the housing 10. be discharged. That is, ozone generated in the ozone generator 13 is discharged from the gas flow path 11 to the outside of the housing 10 together with the indoor air introduced into the gas flow path 11. By mixing indoor air with the ozone generated in the ozone generator 13, ozone can be adjusted to a desired concentration.

The ozone generator 13 generates ozone using indoor air, which is the source gas introduced into the gas flow path 11. The ozone generated in the ozone generator 13 is mixed with indoor air by the airflow formed by the blower 12, adjusted to a desired concentration, discharged to the outside of the casing 10, and diffused into the room 200.

A general method can be used to generate ozone in the ozone generator 13. For example, by applying an alternating current voltage between electrodes arranged through a dielectric, a gas containing oxygen is passed through a discharge space where a silent discharge has occurred, and by giving energy to oxygen and activating it, dissociation or Some of the excited oxygen changes to ozone.

The humidity measurement unit 14 measures the relative humidity of the room 200, which is the space to be ozone treated, at a predetermined cycle or at a predetermined timing. Specifically, the humidity measurement unit 14 measures the humidity of indoor air. The humidity measurement unit 14 transmits information on the relative humidity of the room 200, which is the measurement result, to the system control unit 19. The humidity measuring section 14 is arranged, for example, at the entrance of the gas flow path 11 formed in the ozone generator 1, as shown in FIG. That is, the humidity measuring section 14 is arranged in a region adjacent to the suction port 111 in the gas flow path 11 of the ozone generator 1. Note that relative humidity is simply called humidity.

Note that the humidity measurement unit 14 only needs to be able to appropriately measure the humidity of indoor air, and the location where it is placed is not limited to the entrance portion of the gas flow path 11. The humidity measurement unit 14 may be placed on the outer surface of the housing 10 or may be placed in a location away from the housing 10 of the ozone generator 1 in the room 200.

The storage unit 16 stores various types of information used to control the ozone system 100.

The timer 17 measures the operating time of the ozone system 100, such as the operating time of the ozone generator 13, that is, the time of ozone generation in the ozone generator 13. The timer 17 is set with the remaining ozone generation time by the system control unit 19, and measures the remaining time of the ozone generation time. When the timer 17 completes measuring the remaining time, it sends a remaining time end notification to the system control unit 19 to the effect that the remaining time has ended. By receiving the remaining time end notification, the system control unit 19 can determine that the ozone generation stop condition is satisfied. The ozone generation time in the ozone generator 13 can be expressed as the time of exposure to ozone.

The communication unit 18 communicates with a sensor communication unit 25 of a color difference sensor 22 of the CT value equivalent amount detection unit 2, which will be described later.

The system control unit 19 is a control unit that controls the operation of the ozone generation unit 13 and controls the entire ozone system 100. The system control unit 19 controls the operation of the ozone generating unit 13 so that the ozone CT value necessary for inactivating viruses floating in the room 200 or attached to articles is achieved in the room 200. The target value of the ozone CT value, which is the product of the ozone concentration in the room and the ozone generation time in the ozone generator 13, is corrected based on the humidity of the room 200 to calculate the necessary target value, and the ozone CT value of the room 200 is calculated. Control is performed to stop the generation of ozone in the ozone generator 13 at the time when the value reaches the required target value. The system control unit 19 also calculates ozone generation stop conditions until the ozone CT value in the room 200 reaches the required target value. That is, the system control unit 19 controls the amount of ozone generated by the ozone generation unit 13 based on the humidity in the room 200 measured by the humidity measurement unit 14.

As a result, the ozone system 100 takes the humidity of the room 200 into account and appropriately achieves the ozone CT value in the room 200 necessary for inactivating viruses floating in the indoor space or viruses attached to items in the room 200. be able to.

The ozone generation stop condition is the ozone generation time, which is the time from when the ozone generator 13 starts generating ozone until it stops generating ozone.

The CT value equivalent amount detection unit 2 is provided independently from the casing 10 of the ozone generator 1 and is placed at a position away from the casing 10 in the room 200. Further, the CT value equivalent amount detection unit 2 is fixedly arranged at a corner of the room 200. The CT value equivalent amount detection section 2 detects an equivalent amount corresponding to the product of the ozone concentration in the room 200 and the time of exposure to ozone, here the ozone generation time in the ozone generation section 13. That is, the CT value equivalent amount detection unit 2 detects the CT value equivalent amount. The CT value equivalent amount detection section 2 includes an ozone indicator 21 and a color difference sensor 22.

The ozone indicator 21 is a detection unit that changes color by reacting with ozone, and is a detection unit that changes color as the ozone CT value changes. The ozone indicator 21 includes a chemical substance 21a that is a chemical substance that changes color when reacting with ozone, and that changes color as the ozone CT value changes. The ozone indicator 21 is constructed by applying, for example, the above-mentioned chemical substance 21a onto the surface of a support 21b.

The color difference sensor 22 detects the color difference of the ozone indicator 21, that is, the color difference of the chemical substance 21a that has reacted with ozone in the room 200, at a predetermined period or at a predetermined timing. The color difference of the chemical substance 21a is the amount of reaction of the chemical substance 21a when it reacts with ozone, and is the difference in color that occurs in the chemical substance 21a when it reacts with ozone. This is the amount of change in the color of the ozone indicator 21 from the color in the state before the ozone indicator 21 reacts with ozone.

The color difference sensor 22 transmits information on the color difference of the ozone indicator 21, which is the detection result, to the system control unit 19 as a signal corresponding to the CT value. Thereby, the system control unit 19 can acquire information on the color difference of the ozone indicator 21 as a numerical value. The color difference sensor 22 detects the color difference of the ozone indicator 21 using an optical method. The color difference sensor 22 is, for example, a color sensor. Note that the color difference sensor 22 may detect the color difference of the ozone indicator 21 using an electrical method. That is, the CT value equivalent amount may be substituted with electrical conductivity.

The color difference of the ozone indicator 21 is a value that has a correlation with the ozone CT value. That is, the color difference of the ozone indicator 21 can be said to be a CT value equivalent amount, which is an equivalent amount corresponding to the ozone CT value. FIG. 5 is a characteristic diagram showing the relationship between the ozone CT value and the color difference of the ozone indicator 21 in the first embodiment. In FIG. 5, the ozone CT value (ppm·min) is shown on the horizontal axis, and the color difference of the ozone indicator 21 is shown on the vertical axis.

The sensor storage unit 24 of the color difference sensor 22 stores in advance information on the correspondence between the color difference of the ozone indicator 21, which is an amount equivalent to the CT value, and the ozone CT value at the reference humidity. The correspondence information between the CT value equivalent amount and the ozone CT value is information indicating the relative relationship between the ozone CT value and the CT value equivalent amount, as shown in FIG. Note that the correspondence information between the CT value equivalent amount and the ozone CT value may be stored in the sensor control unit 26.

The reference humidity is the humidity of indoor air that is used as a reference when inactivating viruses in the room 200 using the ozone system 100.

The correspondence information between the CT value equivalent amount and the ozone CT value is the CT value equivalent amount and the ozone CT value corresponding to the CT value equivalent amount, which has been collected in advance by repeating experiments using the ozone system 100 at the standard humidity. It is created based on multiple data of and. In addition, regarding the ozone CT value at this time, a plurality of ozone CT values and virus inactivation rates corresponding to the ozone CT values collected in advance by repeating experiments using the ozone system 100 at the standard humidity are used. Determined based on data.

By using the correspondence information, the CT value equivalent amount detected by the color difference sensor 22 can be converted into a CT value.

The color difference sensor 22 includes a detection section 23, a sensor storage section 24, a sensor communication section 25, and a sensor control section 26.

The detection unit 23 detects the color difference of the ozone indicator 21 that has reacted with ozone diffused into the room 200.

The sensor storage unit 24 stores various information used to control the color difference sensor 22. Additionally, the sensor storage unit 24 stores various types of information transmitted from the system control unit 19.

The sensor communication unit 25 communicates with the communication unit 18 of the ozone generator 1.

The sensor control unit 26 controls the entire color difference sensor 22.

Next, an ozone supply method for inactivating viruses by supplying ozone into the room 200 using the ozone system 100 will be explained. The ozone supply method using the ozone system 100 is an ozone sterilization method that sterilizes the indoor room 200 by supplying ozone to the indoor room 200, which is a space to be ozone treated. First, an overview of the operation of the ozone system 100 when the ozone system 100 inactivates viruses in the room 200 will be described. FIG. 6 is a flowchart showing an overview of the operation of the ozone system 100 according to the first embodiment.

In step S110, reference humidity information is acquired. As described above, the reference humidity is the humidity of the indoor air that is used as a reference when inactivating viruses in the room 200 using the ozone system 100. Specifically, the system control unit 19 acquires information on the reference humidity. Information on the reference humidity is input to the ozone generator 13 from outside the ozone generator 13 via the communication unit 18, for example. The system control unit 19 receives reference humidity information from the communication unit 18 and stores it. Thereby, information on the reference humidity is acquired by the system control unit 19. After that, the process advances to step S120.

In step S120, information on the set ozone CT value is acquired. Specifically, the system control unit 19 acquires information on the set ozone CT value. The set ozone CT value is an ozone CT value that is set in the ozone system 100 when inactivating viruses in the room 200 in an environment where the humidity of the indoor air is the reference humidity. This is the ozone CT value required when inactivating viruses indoors 200 under a certain environment. That is, the set ozone CT value is based on the ozone concentration in the room 200 and the ozone generation time in the room 200, which are required when inactivating the virus in the room 200 in an environment where the humidity of the indoor air is the reference humidity. This can be expressed as the target value of the product of

Information on the set ozone CT value is input to the ozone generator 13 from outside the ozone generator 13 via the communication unit 18, for example. The system control unit 19 receives information on the set ozone CT value from the communication unit 18 and stores it. As a result, information on the set ozone CT value is acquired by the system control unit 19. The set ozone CT value is determined based on, for example, information on the general inactivation rate of viruses or the results of an experiment in which a virus in a space having a volume equivalent to the room 200 was inactivated by ozone. After that, the process advances to step S130.

In step S130, information on the humidity of the room 200, that is, information on the humidity of the indoor air is acquired. Specifically, the system control unit 19 acquires information on the humidity of indoor air. The humidity measurement unit 14 measures the humidity of the indoor air, and transmits information on the humidity of the indoor air, which is the measurement result, to the system control unit 19 as a signal of the humidity of the indoor air. The system control unit 19 receives and stores information on the humidity of indoor air transmitted from the humidity measurement unit 14. As a result, information on the humidity of indoor air is acquired by the system control unit 19. After that, the process advances to step S140.

In step S140, the required ozone CT value is determined. Specifically, the system control unit 19 determines the required ozone CT value. The system control unit 19 transmits information on the determined required ozone CT value to the sensor control unit 26 of the color difference sensor 22 of the CT value equivalent amount detection unit 2 via the communication unit 18. The sensor control unit 26 receives information on the required ozone CT value transmitted from the system control unit 19 via the sensor communication unit 25 and stores it. After that, the process advances to step S150.

The required ozone CT value is a correction value of the CT value obtained by correcting the set ozone CT value based on the humidity of the room 200. The required ozone CT value is an ozone CT value required when inactivating viruses in the room 200, taking into consideration the humidity in the room 200. That is, the required ozone CT value can be expressed as a necessary target value obtained by correcting the above-mentioned target value of the product of the ozone concentration in the room 200 and the ozone generation time in the room 200 based on the humidity of the room 200.

The ability of ozone to inactivate viruses increases as the humidity of the air in the space to be ozonated increases. Therefore, if the humidity in the room 200 is higher than the standard humidity, less ozone will be used to inactivate the virus in the room 200 under the standard humidity conditions. can be inactivated, and the ozone generation time can be shortened for the same ozone concentration. Therefore, when the humidity in the room 200 is higher than the reference humidity, ozone generation can be stopped after being generated for a shorter time than when the ozone concentration is the same and the reference humidity is the same.

That is, when the humidity in the room 200 is higher than the standard humidity, the conditions of the standard humidity and the set ozone CT value are inactivated by inactivating the virus in the room 200 under the condition of an ozone CT value smaller than the set ozone CT value. It is possible to inactivate viruses at the same level as when inactivating viruses indoors. Therefore, when the humidity in the room 200 is higher than the reference humidity, the system control unit 19 determines the required ozone CT value to be smaller than the set ozone CT value based on the humidity in the room 200. That is, when the humidity in the room 200 is higher than the reference humidity, it can be said that the required target value is determined to be a value smaller than the above target value based on the humidity in the room 200.

On the other hand, the ability of ozone to inactivate viruses decreases as the humidity of the air in the space to be ozonated decreases. Therefore, if the humidity in the room 200 is lower than the standard humidity, in order to inactivate the virus at the same level as inactivating the virus in the room 200 under the standard humidity conditions, it is necessary to Since more ozone is required than in the case of the conventional method, the ozone generation time must be increased for the same ozone concentration. Therefore, when the humidity in the room 200 is lower than the reference humidity, ozone generation must be stopped after being generated for a longer time than when the ozone concentration is the same and the humidity is the reference humidity.

That is, when the humidity in the room 200 is lower than the standard humidity, in order to inactivate the virus at the same level as inactivating the virus in the room 200 under the conditions of the standard humidity and the set ozone CT value, , it is necessary to inactivate the virus indoors 200 under the condition of an ozone CT value larger than the set ozone CT value. Therefore, when the humidity in the room 200 is lower than the reference humidity, the system control unit 19 determines the required ozone CT value to be larger than the set ozone CT value based on the humidity in the room 200. That is, when the humidity in the room 200 is lower than the reference humidity, it can be said that the required target value is determined to be larger than the above target value based on the humidity in the room 200.

In step S150, ozone generation is started, and ozone aeration into the room 200 is started. Specifically, the system control unit 19 performs control to start generating ozone and start diffusing the ozone into the room 200 . The system control unit 19 controls the ventilation unit 12, the ozone generation unit 13, the humidity measurement unit 14, and the color difference sensor 22 to start operating. When the blower section 12 operates, indoor air is introduced into the gas flow path 11 from the suction port 111 of the housing 10 of the ozone generator 1 and further supplied to the ozone generator 13 . Then, the ozone generator 13 generates ozone using indoor air as a raw material. Ozone is mixed with indoor air and adjusted by the air flow formed by the blower 12, and is discharged to the outside of the casing 10 from the exhaust port 112 and diffused into the room 200. After that, the process advances to step S160.

In step S160, information on the color difference of the ozone indicator 21, which is an amount equivalent to a CT value, is acquired. Specifically, the color difference sensor 22 of the CT value equivalent amount detection unit 2 acquires information on the color difference of the ozone indicator 21. The color difference sensor 22 detects, at predetermined intervals, the color difference of the ozone indicator 21, which changes color due to reaction with ozone diffused into the room 200. The color difference sensor 22 transmits information on the detected color difference of the ozone indicator 21 to the system control unit 19. After that, the process advances to step S170.

In step S170, the ozone generation in the ozone generator 13 is stopped when the color difference of the ozone indicator 21 reaches the required ozone CT value. Specifically, based on the information on the color difference of the ozone indicator 21, the system control unit 19 stops the generation of ozone in the ozone generator 13 when the color difference of the ozone indicator 21 reaches an amount corresponding to the required ozone CT value. control.

Incidentally, steps S110 to S140 can also be performed after aeration of ozone into the room 200 is started in step S150.

Next, a specific example of the operation of the ozone system 100 will be explained. First, a first example of operation of the ozone system 100 will be described. FIG. 7 is a flowchart showing the procedure of a first example of operation of the ozone system 100 according to the first embodiment.

In step S210, reference humidity information is acquired. Specifically, in the same manner as in step S110 described above, the system control unit 19 acquires information on the reference humidity. An example of the reference humidity of the room 200 is 60%. After that, the process advances to step S220.

In step S220, information on the set ozone CT value is acquired. Specifically, the system control unit 19 acquires the set ozone CT value in the same manner as in step S120 described above. An example of the required ozone CT value is 60 (ppm·min), or a lower limit of 50 (ppm·min) or more and an upper limit of 330 (ppm·min) or less. After that, the process advances to step S230.

In step S230, information on the humidity of indoor air is acquired. Specifically, in the same manner as in step S130 described above, the system control unit 19 acquires information on the humidity of indoor air. After that, the process advances to step S240.

In step S240, the required ozone CT value is determined. Specifically, the system control unit 19 determines the required ozone CT value. In the first operation example, when the humidity of the indoor air is higher than the reference humidity, the system control unit 19 determines the set ozone CT value as it is as the required ozone CT value. That is, the system control unit 19 does not change the ozone CT value used for controlling the ozone generation unit 13 from the set ozone CT value when the humidity of the indoor air is higher than the reference humidity.

The system control unit 19 transmits information on the required ozone CT value: 60 (ppm·min) when the humidity of the indoor air is higher than the reference humidity to the sensor control unit 26 of the color difference sensor 22. The sensor control unit 26 receives information on the required ozone CT value transmitted from the system control unit 19 and stores it. Note that the sensor control unit 26 may cause the sensor storage unit 24 to store information on the required ozone CT value.

On the other hand, if the humidity of the indoor air is lower than the reference humidity, the system control unit 19 determines the required ozone CT value using, for example, correspondence information indicating the relationship between relative humidity and the required ozone CT value. do. FIG. 8 is a diagram for explaining the concept of the relationship between relative humidity and required ozone CT value in the first embodiment. In FIG. 8, the horizontal axis shows the relative humidity, and the vertical axis shows the required ozone CT value. The characteristic diagram shown in FIG. 8 is correspondence information showing the relationship between relative humidity and required ozone CT value. The correspondence information is stored in the system control unit 19 in advance. The system control unit 19 reads the ozone CT value corresponding to the humidity of indoor air from the correspondence information indicating the relationship between the relative humidity and the required ozone CT value, and determines the ozone CT value as the required ozone CT value.

Correspondence information indicating the relationship between relative humidity and required ozone CT value is created as follows using, for example, FIG. 8. First, when the indoor air humidity is 60%, which is the standard humidity, a value of 60 (ppm·min) is obtained as the set ozone CT value necessary for inactivating the virus in the room 200. Then, the required ozone CT value: 60 (ppm·min) when the indoor air humidity is 60% is plotted in the characteristic diagram shown in FIG.

Next, when the humidity of indoor air is 30%, the ozone CT value that gives the same level of virus inactivation rate as when the humidity of indoor air is 60% is set as the value of 100 (ppm min). obtain. The value of 100 (ppm/min) is obtained based on the results of an experiment in which ozone was used to inactivate viruses in a space with a volume equivalent to 200 indoors when the indoor air humidity was 30%. . Then, the value of 100 (ppm·min) is plotted in the characteristic diagram shown in FIG. 8 as the required ozone CT value when the indoor air humidity is 30%.

Next, in the characteristic diagram shown in FIG. 8, the point "Relative humidity: 60%, required ozone CT value: 60 (ppm・min)" and "Relative humidity: 30%, required ozone CT value: 100 (ppm・min)" By connecting the points "min)" with a straight line, a characteristic diagram showing the relationship between relative humidity and set ozone CT value is created. Further, when the relative humidity of the indoor air is 30% or less, by applying an extrapolation method to the characteristic diagram shown in FIG. 8, the characteristic diagram indicated by the broken line shown in FIG. 8 can be obtained. As a result, correspondence information indicating the relationship between the relative humidity and the set ozone CT value as shown in the characteristic diagram of FIG. 8 is obtained.

The system control unit 19 transmits information on the determined required ozone CT value to the sensor control unit 26 of the color difference sensor 22 of the CT value equivalent amount detection unit 2 via the communication unit 18. The sensor control unit 26 receives information on the required ozone CT value transmitted from the system control unit 19 via the sensor communication unit 25 and stores it. After that, the process advances to step S250.

In step S250, ozone generation is started, and ozone aeration into the room 200 is started. Specifically, in the same manner as in step S150 described above, the system control unit 19 performs control to start aeration of ozone into the room 200. After that, the process advances to step S260.

In step S260, the color difference of the ozone indicator 21, which is an amount equivalent to the CT value, is detected. Specifically, the color difference sensor 22 of the CT value equivalent amount detection unit 2 detects the color difference of the ozone indicator 21, which changes color due to reaction with ozone diffused into the room 200, at a predetermined period. After that, the process advances to step S270.

In step S270, it is determined whether the color difference of the ozone indicator 21 detected by the color difference sensor 22 corresponds to the required ozone CT value: 60 (ppm min) when the humidity is higher than the reference humidity. Ru. Specifically, the sensor control unit 26 of the color difference sensor 22 sets the ozone CT value corresponding to 60 (ppm min) when the color difference of the ozone indicator 21 detected by the color difference sensor 22 is at a humidity higher than the reference humidity. It is determined whether or not there is a color difference. The sensor control unit 26 makes the above determination using the correspondence relationship information between the CT value equivalent amount and the ozone CT value stored in the sensor storage unit 24.

That is, the sensor control unit 26 associates the color difference of the ozone indicator 21 detected by the color difference sensor 22 with the vertical axis in the correspondence information shown in FIG. Obtain the ozone CT value of Then, the sensor control unit 26 determines whether the acquired current ozone CT value has a color difference corresponding to the required ozone CT value: 60 (ppm·min).

If it is determined that the color difference of the ozone indicator 21 detected by the color difference sensor 22 does not correspond to the required ozone CT value when the humidity is higher than the reference humidity: 60 (ppm min), step S270 The answer is No, and the process returns to step S260. If it is determined that the color difference of the ozone indicator 21 detected by the color difference sensor 22 corresponds to the required ozone CT value when the humidity is higher than the reference humidity: 60 (ppm min), Yes in step S270. Then, the process advances to step S280.

In step S280, when the color difference of the ozone indicator 21 detected by the color difference sensor 22 is a humidity higher than the reference humidity, an arrival signal indicating that the condition of required ozone CT value: 60 (ppm min) has been reached is transmitted to the system control. 19. Specifically, the sensor control unit 26 transmits the arrival signal to the system control unit 19 via the sensor communication unit 25 of the color difference sensor 22. The system control unit 19 receives the arrival signal transmitted from the sensor control unit 26 via the communication unit 18. Then, based on the arrival signal, the system control unit 19 sets the condition that the required ozone CT value is 60 (ppm min) when the color difference of the ozone indicator 21 detected by the color difference sensor 22 is at a humidity higher than the reference humidity. is determined to have been reached. After that, the process advances to step S290.

In step S290, it is determined whether the humidity of the indoor air is equal to or higher than the reference humidity. Specifically, the system control unit 19 determines whether the humidity of the indoor air is equal to or higher than the reference humidity based on the information on the humidity of the indoor air acquired in step S230.

If it is determined that the humidity of the indoor air is equal to or higher than the reference humidity, the answer is Yes in step S290, and the process proceeds to step S300. If it is determined that the humidity of the indoor air is lower than the reference humidity, the result in step S290 is No, and the process proceeds to step S310.

In step S300, the generation of ozone in the ozone generator 13 is stopped, and the aeration of ozone into the room 200 is stopped. Specifically, the system control unit 19 performs control to stop the generation of ozone in the ozone generator 13 and stop the diffusion of ozone into the room 200. The system control unit 19 performs control to stop the operations of the ozone generation unit 13, humidity measurement unit 14, and color difference sensor 22. The system control unit 19 controls the blower unit 12 to operate even after stopping the generation of ozone in the ozone generator 13, and to stop the blower unit 12 after operating for a predetermined time. This completes a series of operations of the ozone system 100.

Therefore, in steps S270 to S300, the system control unit 19 determines, based on the information on the color difference of the ozone indicator 21, that when the color difference of the ozone indicator 21 reaches an amount corresponding to the required ozone CT value, the ozone generator 13 Performs control to stop the generation of ozone.

In step S310, after the required ozone CT value corresponding to the humidity of the indoor air is achieved in the indoor air, the generation of ozone in the ozone generator 13 is stopped, and the aeration of ozone into the room 200 is stopped. . That is, the operation of the ozone generator 13 is controlled so that the required ozone CT value corresponding to the humidity of the indoor air is satisfied in the room 200. Specifically, the system control unit 19 continues to diffuse ozone into the room 200 until the required ozone CT value corresponding to the humidity of the indoor air is achieved in the room 200, and then continues to diffuse ozone into the room 200. Stop your mind. The system control unit 19 stops the operations of the ventilation unit 12, ozone generation unit 13, humidity measurement unit 14, and color difference sensor 22 after the required ozone CT value corresponding to the humidity of the indoor air is achieved in the indoor air. This completes a series of operations of the ozone system 100.

Therefore, in steps S270 to S290 and step S310, the system control unit 19 performs control to stop the ozone generation in the ozone generation unit 13 when the ozone CT value in the room 200 reaches the required ozone CT value.

When the humidity of the indoor air is lower than the standard humidity, more ozone is required than when the humidity of the indoor air is the standard humidity, so the required ozone CT value corresponding to the humidity of the indoor air is The operation of the ozone generator 13 is continued until the target is achieved, and then the ozone generation in the ozone generator 13 is stopped.

As described above, the system control unit 19 controls the amount of ozone generated by the ozone generation unit 13 based on the humidity in the room 200 measured by the humidity measurement unit 14. Further, the system control unit 19 controls the operation of the ozone generator 13 based on the target value of the ozone CT value, which is the product of the ozone concentration in the room 200 and the ozone generation time in the ozone generator 13. Further, the system control unit 19 controls the operation of the ozone generation unit 13 based on the required target value, which is the target value of the ozone CT value corrected based on the humidity of the room 200 measured by the humidity measurement unit 14. Further, the system control unit 19 performs control to stop the ozone generation in the ozone generation unit 13 when the ozone CT value reaches the required target value.

Next, in step S310, ozone aeration into the indoor room 200 is continued until the required ozone CT value corresponding to the humidity of the indoor air is achieved in the indoor air, and then ozone aeration into the indoor room 200 is stopped. The control method will be explained.

FIG. 9 is a first diagram illustrating the concept of a method for determining ozone generation stop conditions in the ozone system 100 according to the first embodiment. In FIG. 9, time is shown on the horizontal axis, and ozone concentration is shown on the vertical axis. FIG. 9 shows a case where it is assumed that the ozone concentration in the room 200 is kept constant.

For example, in step S270, the system control unit 19 determines that the required ozone CT value when the color difference of the ozone indicator 21 detected by the color difference sensor 22 is at a humidity higher than the reference humidity has reached the condition of 60 (ppm min). It is assumed that 50 minutes have passed since the start of operation of the ozone generating section 13 at the time when it is determined that The ozone CT value at this time corresponds to the area of region A in FIG. In this case, since the ozone CT value is 60 (ppm·min), the system control unit 19 can calculate that the average concentration of ozone in the room 200 is 1.2 ppm.

For example, when the humidity in the room 200 is 30%, the system control unit 19 can determine that the required ozone CT value is 100 from the correspondence information showing the relationship between the relative humidity and the required ozone CT value in FIG. When continuing the operation of the ozone generator 13 until the required ozone CT value: 100 (ppm/min), it is assumed that the ozone concentration will continue to remain at the above average concentration: 1.2 ppm, as shown by the broken line in FIG. , the system control unit 19 can calculate that the entire operation of the ozone generation unit 13 required to achieve the required ozone CT value: 100 (ppm·min) is 83.33 minutes. That is, if the ozone generating unit 13 operates for 83.33 minutes, the required ozone CT value: 100 (ppm min) is achieved in the room 200, so the ozone generation stop condition is calculated as 83.33 minutes.

As a result, the system control unit 19 only has to stop the operation of the ozone generation unit 13 83.33 minutes after the ozone generation unit 13 starts generating ozone. Therefore, the system control unit 19 continues the operation of the ozone generation unit 13 for the remaining 33.3 minutes from the time when it is determined that the condition of the required ozone CT value: 60 (ppm min) has been reached in the room 200. , the operation of the ozone generator 13 may be stopped. The ozone CT value for 33.3 minutes in this case corresponds to the area of region B in FIG.

The ozone generation stop condition is calculated by the formula: 50 minutes x (100/60) = 83.33. (100/60) is the ratio of the required ozone CT value when the humidity in the room 200 is 30% to the required ozone CT value when the humidity in the room 200 is 60%.

Therefore, when the color difference of the ozone indicator 21 detected by the color difference sensor 22 reaches the condition that the required ozone CT value is 60 (ppm/min) when the humidity is higher than the reference humidity, the system control unit 19 controls the required ozone CT value. The remaining ozone generation time until the ozone generator 13 continues to operate until the value: 100 (ppm/min) is calculated, and the remaining time is set in the timer 17.

That is, when the color difference of the ozone indicator 21, which is an amount equivalent to the CT value, reaches the target value of the product of the ozone concentration in the room 200 and the ozone generation time in the room 200, the system control unit 19 sets the required ozone CT value: 100. (ppm/min), that is, the remaining ozone generation time until the color difference of the ozone indicator 21 reaches the required target value corresponding to the humidity of the indoor air. The time is calculated and the remaining time is set in the timer 17.

The timer 17 measures the set remaining time. The system control unit 19 controls the ozone generation unit 13 to stop generating ozone when the timer 17 completes measuring the remaining time.

FIG. 10 is a second diagram illustrating the concept of a method for determining ozone generation stop conditions in the ozone system 100 according to the first embodiment. In FIG. 10, time is shown on the horizontal axis, and ozone concentration is shown on the vertical axis. FIG. 10 shows a case where it is assumed that the relationship between the ozone concentration in the room 200 and the elapsed time is a linear function. As ozone continues to be generated, the ozone concentration in the room 200 gradually increases, so the graph in Figure 10 shows the concept of the relationship between ozone concentration and elapsed time more closely than the graph in Figure 9. It can be said.

For example, in step S270, the system control unit 19 determines that the required ozone CT value when the color difference of the ozone indicator 21 detected by the color difference sensor 22 is at a humidity higher than the reference humidity has reached the condition of 60 (ppm min). It is assumed that 60 minutes have passed since the start of operation of the ozone generating section 13 at the time when it is determined that. The ozone CT value at this time corresponds to the area of region C in FIG. In this case, since the ozone CT value is 60 (ppm/min), the system control unit 19 determines that the ozone concentration in the room 200 at 60 minutes from the start of operation of the ozone generator 13 is 2 ppm. It can be calculated from 10.

For example, when the humidity in the room 200 is 30%, the system control unit 19 determines that the required ozone CT value is 100 (ppm・min) from the correspondence relationship information showing the relationship between the relative humidity and the required ozone CT value in FIG. It can be determined that there is. When continuing the operation of the ozone generator 13 until the required ozone CT value: 100 (ppm/min), it is assumed that the ozone concentration continues to increase linearly as a linear function as shown by the broken line in FIG. The system control unit 19 can calculate that the entire operation of the ozone generation unit 13 required to achieve the required ozone CT value of 100 (ppm·min) is 77.46 minutes. That is, if the ozone generator 13 operates for 77.46 minutes, the required ozone CT value: 100 (ppm min) is achieved in the room 200, so the ozone generation stop condition is calculated as 77.46 minutes.

As a result, the system control unit 19 only has to stop the operation of the ozone generation unit 13 77.46 minutes after the ozone generation unit 13 starts generating ozone. Therefore, the system control unit 19 continues the operation of the ozone generation unit 13 for the remaining 17.46 minutes from the time when it is determined that the condition of the required ozone CT value: 60 (ppm min) has been reached in the room 200. , the operation of the ozone generator 13 may be stopped. The ozone CT value for 17.46 minutes in this case corresponds to the area of region D in FIG.

The method for calculating the ozone generation stop conditions is as follows. From FIG. 10, when the required ozone CT value reaches 60 (ppm/min) in the

room

200, 60 minutes have passed since the start of operation of the ozone generator 13, and the ozone concentration in the room 200 is 2 ppm. . To find the time to reach the condition of the required ozone CT value: 100 (ppm min) indoors 200 from the start of operation of the ozone generator 13, the required ozone CT value: 100 (ppm min) in the room 200 from the start of operation of the ozone generator 13. If the arrival time to reach the condition of (ppm/min) is X minutes and the concentration at that time is Yppm, then the relational expression "60 minutes: 2 ppm = X minutes: Yppm" is established, and "Y = 2 ppm x X minutes/ 60".

In FIG. 10, the area of the triangle formed by region C and region D corresponds to the required ozone CT value: 100 (ppm·min). Since the base of the triangle corresponds to X and the height of the triangle corresponds to Y,
X minutes × (2 ppm × X minutes / 60 minutes) / 2 = required ozone CT value → X ² × 2 ppm / 60 minutes / ² = required ozone CT value → Ozone CT value x 2/(2/60 minutes)
→X=SQRT (CT value x 2ppm/(2/60 minutes))
You can expand the calculation formula. Then, substitute CT value = 100,
The ozone generation stop condition is calculated as follows: X=SQRT(100×2ppm/(2/60 minutes))=77.46 minutes.

The concept of the method for determining ozone generation stop conditions is not limited to the above method. FIG. 11 is a third diagram illustrating the concept of a method for determining ozone generation stop conditions in the ozone system 100 according to the first embodiment. In FIG. 11, time is shown on the horizontal axis, and ozone concentration is shown on the vertical axis. FIG. 11 shows a case where it is assumed that the relationship between the ozone concentration in the room 200 and the elapsed time is a logarithmic function. For example, the relationship between the ozone concentration in the room 200 and the elapsed time may be another function, such as a logarithmic function as shown in FIG. It may be a function. In this case as well, the conditions for stopping ozone generation can be calculated using the same concept as above.

Ozone undergoes natural attenuation over time. Therefore, it can be said that the graph of FIG. 11, in which the slope gradually decreases, shows the concept of the relationship between ozone concentration and elapsed time that is closer to the actual situation than the graph of FIG. 10. Computational Fluid Dynamics simulations conducted by the inventors that take into account the natural attenuation of ozone also show that a logarithmic function whose slope gradually decreases is better than a linear function when the ozone concentration changes over time. We have obtained knowledge that this is close to the actual situation of our relationship with time.

Note that FIGS. 9 to 11 described above are not actually applied to calculating the ozone generation stop conditions in the ozone system 100, but are examples for explaining the concept of a method for determining the ozone generation stop conditions.

Next, a second operation example of the ozone system 100 will be explained. FIG. 12 is a flowchart showing the procedure of a second example of operation of the ozone system 100 according to the first embodiment. Below, steps different from the first operation example described above will be explained.

First, as in the case of the first operation example described above, steps S210 to S260 are performed. After that, the process advances to step S410.

In step S410, the color difference information of the ozone indicator 21 is continuously and sequentially transmitted to the system control unit 19 as a signal corresponding to the CT value. Specifically, the color difference sensor 22 continuously transmits color difference information, which is a detection result detected at a predetermined period, to the system control unit 19 as a signal corresponding to a CT value. The system control unit 19 receives and stores the signal corresponding to the CT value transmitted from the color difference sensor 22. Thereby, information on the color difference of the ozone indicator 21, which is a detection result detected at a predetermined period, is acquired by the system control unit 19 in real time. After that, the process advances to step S420.

In step S420, it is determined whether the color difference of the ozone indicator 21 detected by the color difference sensor 22 corresponds to the required ozone CT value: 100 (ppm min) when the humidity of the indoor air is 30%. , is determined. Specifically, the system control unit 19 determines that the color difference of the ozone indicator 21 detected by the color difference sensor 22 is the color difference corresponding to the required ozone CT value: 100 (ppm min) when the humidity of the indoor air is 30%. Determine whether it has happened or not. The system control unit 19 makes the above determination using the correspondence relationship information between the CT value equivalent amount and the ozone CT value stored in the storage unit 16 of the ozone generator 1.

That is, the system control unit 19 associates the color difference of the ozone indicator 21 detected by the color difference sensor 22 with the vertical axis in the correspondence relationship information shown in FIG. Obtain the ozone CT value of Then, the system control unit 19 determines whether the acquired current ozone CT value has a color difference corresponding to the required ozone CT value: 100 (ppm·min).

If it is determined that the color difference of the ozone indicator 21 detected by the color difference sensor 22 does not correspond to the required ozone CT value: 100 (ppm min) when the humidity of the indoor air is 30%, No is determined in step S420, and the process returns to step S410. If it is determined that the color difference of the ozone indicator 21 detected by the color difference sensor 22 corresponds to the required ozone CT value when the indoor air humidity is 30%: 100 (ppm min), step S420 The result is Yes, and the process advances to step S300.

Therefore, in step S420 and step S300, the system control unit 19 determines, based on the information on the color difference of the ozone indicator 21, that when the color difference of the ozone indicator 21 reaches an amount corresponding to the required ozone CT value, the ozone generation unit 13 Performs control to stop the generation of ozone.

The ozone system 100 according to the first embodiment is an ozone system that supplies ozone indoors, and the ozone system 100 is an ozone system that supplies ozone indoors. An ozone system including a control section that controls the amount of ozone generated by the generation section 13 is realized.

In the ozone system 100 according to the first embodiment, an ozone supply method for supplying ozone indoors includes a step of obtaining indoor humidity, a step of supplying ozone indoors, and a step based on the indoor humidity. and controlling the amount of ozone generated.

As described above, in the ozone system 100 according to the first embodiment, the system control unit 19 controls the amount of ozone necessary to inactivate viruses in the room 200 in an environment where the humidity of the indoor air is the reference humidity. The set ozone CT value, which is a CT value, is corrected based on the humidity in the room 200, and the necessary ozone CT value required when inactivating the virus in the room 200 is calculated by taking into consideration the humidity in the room 200. . Then, the system control unit 19 performs control to stop the ozone generation in the ozone generation unit 13 when the indoor ozone CT value reaches the required target value.

By performing such control, the ozone system 100 takes the humidity of the room 200 into account and operates the ozone generator even if the humidity of the room 200 is higher than the reference humidity or the humidity of the indoor air is lower than the reference humidity. 13 can be appropriately controlled. As a result, in the ozone system 100, due to changes in the humidity in the room 200, the virus inactivation effect in the room 200 may become insufficient, or more ozone than necessary may be diffused into the room 200. do not have. That is, in the ozone system 100, the ozone CT value necessary for inactivating airborne viruses in the indoor space or viruses attached to objects in the room 200 can be appropriately achieved in the room 200. Inactivation is possible.

Further, the ozone system 100 uses an ozone indicator 21 equipped with a chemical substance 21a whose color changes with changes in the ozone CT value, to determine the ozone concentration in the room 200 and the ozone generation time in the ozone generator 13. A CT value equivalent amount, which is an equivalent amount corresponding to the ozone CT value, which is the product, is detected. Based on the CT value equivalent amount in the room 200, the system control unit 19 can perform control to stop the generation of ozone when the CT value in the room 200 reaches the required target value. That is, the system control unit 19 can perform control to stop the generation of ozone when the CT value equivalent amount in the room 200 reaches the required target value.

Therefore, the ozone system 100 can appropriately inactivate viruses in the room 200 without detecting the ozone concentration in the room 200 using an ozone concentration meter. Moreover, the ozone system 100 can detect the amount equivalent to the CT value in the room 200 using the chemical substance 21a, which is cheaper than an ozone concentration meter, and the ozone system 100 can be realized at a low cost.

Further, in the ozone system 100, the CT value equivalent amount detection section 2 equipped with the ozone indicator 21 is arranged in the room 200 at a position away from the casing 10 of the ozone generator 1 in which the ozone generation section 13 is provided. . Although it depends on the layout of the room 200, it is more difficult for the ozone generated in the ozone generator 13 to reach a location in the room 200 that is farther away from the ozone generator 1. Therefore, if it is confirmed that the CT value has reached the required target value at a location away from the casing 10 in the room 200, it can be considered that the desired required target value has been achieved in the indoor space of the room 200. . Therefore, it is preferable that the CT value equivalent amount detection section 2 is disposed in the room 200 at a position away from the casing 10 of the ozone generator 1 in which the ozone generation section 13 is provided.

Furthermore, in the ozone system 100, the CT value equivalent amount detection unit 2 is installed at the farthest position from the ozone generator 1 in the room 200. Thereby, in the ozone system 100, it can be more reliably confirmed that the desired required target value is achieved in the indoor space of the room 200. Therefore, in the ozone system 100, by selecting the installation location of the CT value equivalent amount detection unit 2 in the room 200, it is possible to improve the detection accuracy of the ozone CT value equivalent amount.

In addition, by installing the CT value equivalent amount detection unit 2 at a position relatively far from the housing 10 in the room 200, ozone can more reliably sterilize the area relatively far from the housing 10. The generation and stop conditions can be obtained.

Furthermore, the CT value equivalent amount detection unit 2 may be installed in a space in the room 200 on the side toward which the suction port 111 of the housing 10 faces. It is difficult for ozone to reach the space on the side where the suction port 111 faces from the discharge port 112 of the housing 10 . Therefore, by installing the CT value equivalent amount detection unit 2 in the space on the side where the suction port 111 of the housing 10 faces in the room 200, it is possible to more reliably reach the space on the side where the suction port 111 of the housing 10 faces. It is possible to obtain ozone generation stop conditions that allow sterilization by ozone.

Further, when an air conditioner such as an air conditioner or an electric fan is installed in the indoor space, the CT value equivalent amount detection unit 2 detects the position of the casing 10 in the indoor space and the direction in which the suction port 111 of the casing 10 faces. Depending on the circumstances, it may be installed in a space in the room 200 that is difficult for air to reach. By installing the CT value equivalent amount detection unit 2 in a space that is difficult for air from the air conditioner to reach, ozone generation enables more reliable ozone sterilization even to the space on the side where the inlet 111 of the housing 10 faces. Stop conditions can be obtained.

In addition, by selecting the installation position of the CT value equivalent amount detection unit 2, the user can select the reliability of the sterilization level of the room 200 that the user desires, increasing the degree of freedom in selecting the sterilization level. It becomes possible to realize an ozone system 100 that is large and easy to use for the user.

As described above, the ozone system 100 according to the first embodiment has the effect of being able to provide a comfortable space to the user in consideration of the humidity in the room 200.

Embodiment 2.
In the first embodiment described above, a case has been described in which the CT value equivalent amount detection section 2 is provided independently from the casing 10 of the ozone generator 1 and is arranged at a position away from the casing 10. In Embodiment 2, a case will be described in which the CT value equivalent amount detection section 2 is provided in the housing 10 of the ozone generator 1.

FIG. 13 is a schematic diagram showing the gas flow path 11 formed in the housing 10 of the ozone generator 1a of the ozone system 100a according to the second embodiment. As shown in FIG. 13, in the ozone system 100a according to the second embodiment, the CT value equivalent amount detection section 2 is located adjacent to the entrance area of the gas flow path 11 in the case 10 of the ozone generator 1a, that is, adjacent to the suction port 111. The casing 10 is exposed on the outer surface of the casing 10. The color difference sensor 22 is arranged in the lower part of the region adjacent to the suction port 111 in the gas flow path 11 . Further, the ozone indicator 21 is disposed in the gas flow path 11 at a lower part of a region adjacent to the suction port 111 and below the color difference sensor 22 .

In the ozone system 100a configured as described above, the ozone indicator 21 comes into contact with the indoor air introduced into the suction port 111. Then, the color difference sensor 22 detects the color difference of the ozone indicator 21. As a result, the ozone indicator 21 does not come into contact with the ozone generated by the ozone generator 13 within the gas flow path 11 and is not affected by the ozone generated by the ozone generator 13 within the gas flow path 11. It is possible to detect color differences. Moreover, since the ozone indicator 21 is arranged in the region adjacent to the suction port 111 in the gas flow path 11, maintenance such as inspection and replacement of the ozone indicator 21 is easy.

The ozone system 100a according to the second embodiment configured as described above has the same effects as the ozone system 100 according to the first embodiment.

Furthermore, in the ozone system 100a, the color difference sensor 22 is capable of exchanging information with the system control unit 19 via a communication line (not shown) inside the housing 10. Therefore, in the ozone system 100a, wireless communication can be performed between the CT value equivalent amount detection unit 2 located at a position away from the housing 10 and the housing 10, which was necessary in the ozone system 100 according to the first embodiment. No configuration for communication or wired communication is required. Thereby, in the ozone system 100a, the configuration can be simplified and the cost can be reduced.

Furthermore, in the ozone system 100a, the CT value equivalent amount detection section 2 is incorporated into the casing 10 of the ozone generator 1a, thereby simplifying the overall configuration of the ozone system 100a. Thereby, in the ozone system 100a, installation of the ozone system 100a is completed simply by installing the ozone generator 1a at a desired position in the room 200, and the installation work of the ozone system 100a becomes easy.

Furthermore, in the ozone system 100a, compared to the ozone system 100 according to the first embodiment, the CT value equivalent amount detection unit 2 is installed at a position relatively close to the housing 10 in the room 200. By installing the CT value equivalent amount detection unit 2 in a position relatively close to the housing 10 in the room 200, it is possible to obtain ozone generation stop conditions that allow the room 200 to be sterilized while reducing the amount of ozone gas generated. can. Since high concentrations of ozone are not favorable for the human body, ozone sterilization with an emphasis on safety can be performed by installing the CT value equivalent amount detection unit 2 in a position relatively close to the housing 10 in the room 200. can.

Furthermore, the CT value equivalent amount detection unit 2 may be arranged on the outer surface of the front side of the casing 10 of the ozone generator 1a. In this case as well, the color difference of the ozone indicator 21 can be detected by the color difference sensor 22 of the CT value equivalent amount detection section 2 . The front surface of the housing 10 is the side of the outer surface of the housing 10 where the suction port 111 is formed.

Embodiment 3.
In the first embodiment described above, a case has been described in which the CT value equivalent amount detection section 2, which is independent from the housing 10 of the ozone generator 1, is fixedly arranged at a position away from the housing 10. In Embodiment 3, a case will be described in which the CT value equivalent amount detection unit 2a independent from the housing 10 of the ozone generator 1 can be manually placed at a desired position in the room 200.

FIG. 14 is a schematic diagram showing a configuration example of an ozone system 100b according to the third embodiment. FIG. 14 shows a state in which the ozone system 100b is applied to an indoor room 200 that is a space to be ozone treated. The ozone system 100b according to the third embodiment is different from the first embodiment in that, instead of the CT value equivalent amount detection section 2, a CT value equivalent amount detection section 2a that can be manually placed at a desired position in the room 200 is provided. This ozone system 100 is different.

FIG. 15 is a schematic diagram showing a configuration example of the automatic supply mechanism 300 of the ozone indicator in the CT value equivalent amount detection section 2a included in the ozone system 100b according to the third embodiment. In FIG. 15, the color difference sensor 22 is also shown. FIG. 16 is a sectional view showing the structure of the ozone indicator sheet 301 in the CT value equivalent amount detection section 2a included in the ozone system 100b according to the third embodiment. In FIG. 16, a cross section along the longitudinal direction of the ozone indicator sheet 301 and the thickness direction of the ozone indicator sheet 301 is shown. FIG. 17 is a block diagram showing a functional configuration related to automatic supply of an ozone indicator in the CT value equivalent amount detection section 2a included in the ozone system 100b according to the third embodiment.

The CT value equivalent amount detection unit 2a may be provided with the above-described single ozone indicator 21, or may be provided with an automatic ozone indicator supply mechanism 300 instead of the single ozone indicator 21. The ozone indicator automatic supply mechanism 300 automatically supplies the ozone indicator to a position where the color difference sensor 22 can detect the color difference of the ozone indicator. FIG. 15 shows a case where the ozone indicator automatic supply mechanism 300 automatically supplies the ozone indicator 21 to a position directly below the color difference sensor 22.

The ozone indicator automatic supply mechanism 300 includes an ozone indicator sheet 301, a sheet unwinding section 302, a sheet winding section 303, a film peeling section 304, and an automatic supply control section 305.

As shown in FIG. 16, the ozone indicator sheet 301 includes a long roll paper 311 as a support, a chemical substance 312, and a laminate film 313 made of aluminum, which are laminated in this order. The chemical substance 312 is a chemical substance whose color changes with the change in the ozone CT value described above. In the ozone indicator sheet 301, the chemical substances 312 are arranged at predetermined positions in the width direction of the roll paper 311 on the surface of the roll paper 311 at predetermined intervals in the longitudinal direction of the roll paper 311. There is. The chemical substance 312 is sealed between the paper roll 311 and the laminate film 313, and is not exposed to indoor air and does not react with ozone until the laminate film 313 is peeled off.

The sheet unwinding unit 302 includes a sheet unwinding roll 321 wound with an ozone indicator sheet 301 in which no chemical substance 312 is used.

The sheet winding unit 303 includes a sheet winding roll 322 around which the used ozone indicator sheet 301 is wound, and a sheet winding motor 323 that rotationally drives the sheet winding roll 322.

The film peeling unit 304 peels the laminate film 313 from the unused ozone indicator sheet 301 unwound from the sheet unwinding roll 321. The film peeling unit 304 includes a film winding roll 324 around which the laminate film 313 peeled from the unused ozone indicator sheet 301 is wound, and a film winding motor 325 that rotationally drives the film winding roll 324. Be prepared. Before use, the laminate film 313 at the starting end of the ozone indicator sheet 301 wound around the sheet unwinding roll 321 is peeled off, and the peeled laminate film 313 is wound around the film winding roll 324.

The automatic supply control unit 305 controls the operations of the sheet winding motor 323 and the film winding motor 325 to supply the chemical to a position where the color difference of the chemical substance 312 of the ozone indicator can be detected by the color difference sensor 22. Control automatic supply of substance 312. The automatic supply control unit 305 controls automatic supply of the chemical substance 312 under the control of the system control unit 19 . The automatic supply control unit 305 is capable of communicating with the sheet winding motor 323 and the film winding motor 325, and transmits control signals to the sheet winding motor 323 and the film winding motor 325. The sheet winding motor 323 and the film winding motor 325 receive the control signal transmitted from the automatic supply control section 305 and operate based on the control signal.

In the ozone system 100b, the ozone indicator chemical substance 312 is automatically supplied to a position directly below the color difference sensor 22 before the ozone generation section 13 starts generating ozone. That is, the sheet winding motor 323 of the sheet winding section 303 rotates the sheet winding roll 322, so that the unused ozone indicator sheet 301 is unwound from the sheet winding roll 321. The ozone indicator sheet 301 unwound from the sheet unwinding roll 321 has the laminate film 313 on the surface of the ozone indicator sheet 301 peeled off by the film peeling section 304 . That is, when the film winding motor 325 rotates the film winding roll 324, the laminate film 313 on the surface of the ozone indicator sheet 301 is peeled off.

Then, the ozone indicator sheet 301 unwound from the sheet unwinding roll 321 is conveyed from the sheet unwinding roll 321 toward the sheet winding roll 322 while the laminate film 313 is peeled off by the film peeling section 304. As a result, the ozone indicator sheet 301 with the laminate film 313 peeled off and the chemical substance 312 exposed is conveyed from the sheet unwinding roll 321 toward the sheet winding roll 322. Thereafter, when the laminate film 313 is peeled off and the exposed chemical substance 312 is transported to a position directly below the color difference sensor 22, the sheet winding motor 323 is stopped. As a result, the chemical substance 312 is automatically supplied to a position directly below the color difference sensor 22.

The automatic supply operation of the ozone indicator described above is performed after the ozone generator 1 starts operating and before the ozone generator 13 starts generating ozone. Thereby, unused chemical substances 312 can be automatically prepared when the ozone system 100b is used.

The ozone system 100b according to the third embodiment described above has the same effects as the ozone system 100 according to the first embodiment.

Furthermore, in the ozone system 100b, the CT value equivalent amount detection unit 2a, which is independent from the housing 10 of the ozone generator 1, can be manually placed at a desired position in the room 200. This allows the ozone system 100b to freely move the CT value equivalent amount detection unit 2a to any location according to the indoor layout, realizing an ozone system 100b with a high degree of freedom in placement and ease of use. has been done.

In addition, in the ozone system 100b, the CT value equivalent amount detection unit 2a is equipped with an automatic ozone indicator supply mechanism 300, so that the burden of replacing the ozone indicator is significantly reduced, and an easy-to-use ozone system 100b is realized. .

Next, the respective hardware configurations of the control unit 80 according to Embodiments 1 to 3 will be described. The control unit 80 includes the system control unit 19 of the ozone generator 1 according to the first to third embodiments, the sensor control unit 26 of the color difference sensor 22, and the ozone indicator automatic supply mechanism 300 according to the third embodiment. This corresponds to each of the automatic supply control units 305. Each function of the control unit 80 according to Embodiments 1 to 3 is realized by a processing circuit. The processing circuit may be dedicated hardware or may be a processing device that executes a program stored in a storage device.

If the processing circuitry is dedicated hardware, the processing circuitry may be a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an application-specific integrated circuit, a field programmable gate array, or a combination thereof. is applicable. FIG. 18 is a diagram showing a configuration in which each function of the control unit 80 according to Embodiments 1 to 3 is realized by hardware. The processing circuit 81 includes a logic circuit 81a that implements the functions of the control section 80.

When the processing circuit 81 is a processing device, the functions of the control unit 80 are realized by software, firmware, or a combination of software and firmware.

FIG. 19 is a diagram showing a configuration in which each function of the control unit 80 according to Embodiments 1 to 3 is realized by software. The processing circuit 81 includes a processor 811 that executes a program 81b, a random access memory 812 that the processor 811 uses as a work area, and a storage device 813 that stores the program 81b. The functions of the control unit 80 are realized by the processor 811 loading the program 81b stored in the storage device 813 onto the random access memory 812 and executing it. Software or firmware is written in a programming language and stored in storage device 813. The processor 811 can be, for example, a central processing unit, but is not limited thereto. The storage device 813 is RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), or EEPROM (registered trademark) (Electrically Erasable Programmable Read Only Memory). Apply semiconductor memory such as can. The semiconductor memory may be a non-volatile memory or a volatile memory. In addition to semiconductor memory, the storage device 813 can be a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, or a DVD (Digital Versatile Disc). Note that the processor 811 may output data such as calculation results to the storage device 813 for storage, or may store the data in an auxiliary storage device (not shown) via the random access memory 812. By integrating the processor 811, random access memory 812, and storage device 813 into one chip, the functions of the control section 80 can be realized by a microcomputer.

The processing circuit 81 realizes the functions of the control unit 80 by reading and executing the program 81b stored in the storage device 813. It can also be said that the program 81b causes the computer to execute procedures and methods for realizing the functions of the control unit 80.

Note that the processing circuit 81 may realize some of the functions of the control unit 80 using dedicated hardware, and may realize some of the functions of the control unit 80 using software or firmware.

In this way, the processing circuit 81 can realize each of the above functions using hardware, software, firmware, or a combination thereof.

The configurations shown in the embodiments above are merely examples, and can be combined with other known techniques, or can be combined with other embodiments, within the scope of the gist. It is also possible to omit or change part of the configuration.

1, 1a ozone generator, 2, 2a CT value equivalent amount detection unit, 10 housing, 11 gas flow path, 12 ventilation unit, 13 ozone generation unit, 14 humidity measurement unit, 15 control device, 16 storage unit, 17 timer , 18 communication section, 19 system control section, 21 ozone indicator, 21a, 312 chemical substance, 21b support, 22 color difference sensor, 23 detection section, 24 sensor storage section, 25 sensor communication section, 26 sensor control section, 80 control section , 81 Processing circuit, 81a Logic circuit, 81b Program, 100, 100a, 100b Ozone system, 111 Inlet, 112 Outlet, 200 Indoor, 201 Floor, 202 Ceiling, 203 One wall, 204 Other wall, 211, 212 Arrow, 300 ozone indicator automatic supply mechanism, 301 ozone indicator sheet, 302 sheet unwinding section, 303 sheet winding section, 304 film peeling section, 305 automatic supply control section, 311 roll paper, 313 laminated film, 321 sheet unwinding roll, 322 sheet winding roll, 323 sheet winding motor, 324 film winding roll, 325 film winding motor, 811 processor, 812 random access memory, 813 storage device.

Claims

An ozone system that supplies ozone indoors,
an ozone generating section that generates the ozone;
a humidity measuring unit that measures the indoor humidity;
a control unit that controls the amount of ozone generated by the ozone generation unit based on the indoor humidity measured by the humidity measurement unit;
An ozone system characterized by comprising:
The control unit controls the operation of the ozone generator based on a target value of the product of the ozone concentration in the room and the ozone generation time in the ozone generator;
The ozone system according to claim 1, characterized in that:
The control unit controls the operation of the ozone generation unit based on a necessary target value, which is the target value corrected based on the indoor humidity measured by the humidity measurement unit;
The ozone system according to claim 2, characterized in that:
The control unit performs control to stop the generation of the ozone in the ozone generation unit when the product reaches the required target value;
The ozone system according to claim 3, characterized in that:
comprising an equivalent amount detection unit that detects an equivalent amount corresponding to the product in the room,
The control unit performs control to stop the generation of the ozone in the ozone generating unit at the time when the product in the room reaches the required target value, based on the equivalent amount in the room;
The ozone system according to claim 4, characterized in that:
When the equivalent amount reaches the target value, the control unit calculates the remaining ozone generation time until the equivalent amount reaches the required target value, performing control to stop the generation of the ozone in the ozone generator at the time when the measurement of the remaining time is completed;
The ozone system according to claim 5, characterized in that:
comprising a timer that measures the time during which the ozone is generated in the ozone generator;
The control unit sets the remaining time on a timer, and controls the ozone generation unit to stop generating the ozone when the timer completes measuring the remaining time;
The ozone system according to claim 6, characterized in that:
The control unit performs control to stop the generation of the ozone in the ozone generation unit at the time when the equivalent amount in the room reaches the amount equivalent to the required target value;
The ozone system according to claim 5, characterized in that:
The equivalent amount detection section detects a color difference between a chemical substance disposed in the room and whose color changes with a change in the product and the chemical substance from the start of generation of ozone in the ozone generation section as the equivalent amount. comprising a sensor for detecting;
Ozone system according to any one of claims 5 to 8, characterized in that:
The chemical substance is located in the room at a position away from a casing in which the ozone generating section is provided;
The ozone system according to claim 9, characterized in that:
A plurality of chemical substances are sealed between the long support and the laminate film, and a plurality of chemical substances are placed on the surface of the long support at predetermined intervals in the longitudinal direction of the long support. The unused chemical substance is exposed by peeling off the laminate film from the chemical substance sheet on which the chemical substance is arranged, and the exposed chemical substance is automatically moved to a position where the color difference can be detected by the sensor. be equipped with an automatic feeding mechanism for placing the
11. The ozone system according to claim 10.
a gas flow path in which the ozone generating section is arranged, an inlet through which indoor air is introduced, and an outlet through which ozone generated in the ozone generating section is discharged, formed at both ends;
a blower section that is provided at a position closer to the suction port than the ozone generating section in the gas flow path and forms an air flow that introduces the indoor air into the gas flow path;
Equipped with
the chemical substance is disposed in the gas flow path at a position closer to the suction port than the blower;
The ozone system according to claim 9, characterized in that:
An ozone supply method for supplying ozone indoors,
obtaining the indoor humidity;
supplying the ozone into the room;
controlling the amount of ozone to be generated based on the humidity in the room;
An ozone supply method characterized by comprising: