CN116056736A - Ozone treatment device and reporting device - Google Patents
Ozone treatment device and reporting device Download PDFInfo
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- CN116056736A CN116056736A CN202180058103.1A CN202180058103A CN116056736A CN 116056736 A CN116056736 A CN 116056736A CN 202180058103 A CN202180058103 A CN 202180058103A CN 116056736 A CN116056736 A CN 116056736A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
- A61L9/04—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air without heating
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Abstract
The ozone treatment device of the present invention comprises: an ozone generating unit for generating ozone in the processing space; an ozone concentration measuring unit. Determining the concentration of ozone in the treatment space; and a control unit that calculates a drive output value of the ozone generating unit based on the measured ozone concentration, wherein the control unit determines that the removal object has been removed to a predetermined reference value or less based on a relationship between the ozone concentration and time after completion of the oxidation after determining that the oxidation of the interfering substance other than the removal object has been completed based on the ozone concentration or the drive output value.
Description
Technical Field
The present invention relates to an ozone treatment apparatus and a reporting apparatus.
Background
Ozone has a strong oxidizing power, and thus ozone treatment apparatuses that bring ozone into contact with an object to be treated, such as sterilization, deodorization, organic matter removal, and harmful matter removal, to remove (deodorize) and sterilize the object to be removed are used in various fields.
As an ozone treatment apparatus, for example, an ozone sterilization apparatus is proposed which includes an ozone generator for supplying ozone into a sterilization chamber and an ozone CT value detector for detecting an integrated value of an ozone concentration and time in the sterilization chamber (for example, refer to patent document 1). In an ozone sterilization apparatus, when ozone is supplied from an ozone generator into a sterilization chamber and sterilization is performed on an object to be sterilized, sterilization is stopped when an integrated value CT value from an ozone CT value detector becomes a predetermined detection value.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2007-159820
Disclosure of Invention
Technical problem to be solved by the invention
However, in the ozone sterilization apparatus of patent document 1, if there is an interfering substance that reacts with ozone more easily than the object to be removed, there is a problem that the removal of the object to be removed cannot be performed sufficiently, and ozone treatment is stopped in a state where the concentration of the object to be removed does not decrease below a predetermined value.
An object of one embodiment of the present invention is to provide an ozone treatment device capable of performing a target treatment by reducing the concentration of an object to be removed to a predetermined value or less even when an interfering substance is present in a space.
Means for solving the technical problems
An ozone treatment device according to an aspect of the present invention includes: an ozone generating unit for generating ozone in the processing space; an ozone concentration measuring unit configured to measure an ozone concentration in the processing space; and a control unit that calculates a drive output value of the ozone generating unit based on the measured ozone concentration, wherein the control unit determines that the removal object has been removed to a predetermined reference value or less based on a relationship between the ozone concentration and time after the completion of the oxidation after determining that the oxidation of the interfering substance other than the removal object has been completed based on the ozone concentration or the drive output value.
One aspect of the reporting device of the present invention includes: an ozone concentration measuring unit for measuring the concentration of ozone in the processing space; and a determination unit that, after determining that oxidation of an interfering substance other than the removal target object is completed based on the measured ozone concentration, determines that the removal target object has been removed to a predetermined reference value or less based on a relationship between the ozone concentration after completion of the oxidation and time.
Effects of the invention
In one embodiment of the ozone treatment apparatus of the present invention, even when an interfering substance is present in a space, the concentration of an object to be removed can be reduced to a predetermined value or less to perform a target treatment.
Drawings
Fig. 1 is a schematic configuration diagram showing an ozone treatment apparatus according to a first embodiment.
Fig. 2 is a flowchart illustrating the ozone treatment method.
Fig. 3 is an explanatory diagram showing a relationship between time and ozone concentration.
Fig. 4 is a schematic configuration diagram showing an ozone treatment apparatus according to a second embodiment.
Fig. 5 is a diagram showing an example of a relationship between time and a drive output value of the ozone generating section.
Fig. 6 is a flowchart illustrating the ozone treatment method.
Fig. 7 is a schematic configuration diagram showing a reporting device according to the third embodiment.
Fig. 8 is a flowchart illustrating the reporting method.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail. In the drawings, the same reference numerals are given to the same components for the sake of easy understanding of the description, and redundant description is omitted. In addition, the scale of each component in the drawings may be different from the actual scale. In the present specification, unless otherwise specified, the term "to" representing the wavy line in the numerical range "means that the numerical values described before and after the wavy line are included as the lower limit value and the upper limit value.
First embodiment
< ozone treatment device >)
An ozone treatment apparatus according to a first embodiment of the present invention will be described. Further, it is assumed that the treatment space in which the ozone treatment device is installed contains the object to be removed and other interfering substances. Fig. 1 is a schematic configuration diagram showing an ozone treatment apparatus according to the present embodiment. As shown in fig. 1, an ozone treatment apparatus 1A includes an ozone generating section 10, an ozone concentration sensor 20 as an ozone concentration measuring section, and a control section 30A, and is provided in a treatment space S. The ozone treatment apparatus 1A brings the object to be removed and the interfering substance present in the treatment space S into contact with ozone to be oxidized and decomposed, thereby removing the object to be removed and the interfering substance to reduce the concentration of the object to be removed and the interfering substance to a permissible value or less.
The processing space is a closed space such as an indoor space of a building such as a house, a building, a hospital, a welfare facility, a vehicle such as an automobile or a train, or an airplane, and is an environment in which air exists. The enclosed space comprises what may be considered a substantially enclosed space, and air may or may not be circulated.
The object to be removed is bacteria, viruses, volatile Organic Compounds (VOC), odor components, or the like, but in the present embodiment, specific bacteria and viruses are used. The interfering substance is a substance that reacts with ozone more easily than the object to be removed, and is a specific bacterium or other bacterium other than a virus, a VOC, an odor component, or the like. The malodor component is malodor substances, volatile organic compounds, and the like, and includes NH 3 、H 2 S, etc.
The ozone generating unit 10 generates ozone in the process space S from oxygen in the air in the process space S. The ozone generating unit 10 is electrically connected to the control unit 30A, and is controlled by the control unit 30A. The ozone generating unit 10 can generate ozone based on the drive output value sent from the control unit 30A.
Any method may be used as long as ozone can be generated in the ozone generating section 10. As the ozone generating section 10, for example, a device that generates ozone by using a discharge type in which a discharge electrode and a counter electrode are alternately arranged in a state of facing each other, a device that generates ozone by using a photochemical reaction system using ultraviolet rays, or the like can be used.
In the device for generating ozone by discharge, a voltage is applied to both electrodes, and a discharge is generated between the electrodes. By passing air between the electrodes that generate electric discharge, oxygen contained in the air is activated, and a part of the dissociated or excited oxygen is changed into ozone (O 3 ). Thereby, ozone is generated in the air. Then, the generated ozone reacts with the object to be removed contained in the air in the processing space S, and the object to be removed is decomposed and removed. The amount of ozone generated (ozone generation amount) in the ozone generating unit 10 can be controlled (increased/decreased, operated, stopped, etc.) by the control unit 30A by adjusting the driving output value and the discharge amount.
As a device for generating ozone by a photochemical reaction system using ultraviolet rays, an ultraviolet irradiation device including an ultraviolet lamp that emits ultraviolet rays can be used. As the ultraviolet lamp, for example, a low-pressure mercury lamp, an excimer lamp, or the like can be used, but it is preferable to use an excimer lamp capable of emitting light not including ozone decomposition wavelength.
The ozone concentration sensor 20 is not particularly limited and may be appropriately selected. As the ozone concentration sensor 20, for example, a semiconductor sensor having a semiconductor element as a gas-sensitive portion made of a metal oxide semiconductor material, or the like can be used. In the semiconductor sensor, the amount of change in the resistance value of the semiconductor element caused by ozone contacting the surface of the semiconductor element is detected, the ozone concentration is measured, and a voltage signal corresponding to the ozone concentration is output as an ozone concentration detection value.
The control unit 30A is connected to each component constituting the ozone treatment apparatus 1A such as the ozone generating unit 10 so as to control the components. The control unit 30A includes a storage means for storing a control program and various stored information, and a calculation means operated based on the control program. The control unit 30A is realized by reading and executing a control program or the like stored in the storage means by the arithmetic means.
The control unit 30A calculates a driving output value of the ozone generating unit 10 based on the ozone concentration measured by the ozone concentration sensor 20, and controls the amount of ozone generated by the ozone generating unit 10. Specifically, control unit 30A receives an ozone concentration detection value, which is a signal of a measurement result of the ozone concentration measured by ozone concentration sensor 20. The control unit 30A calculates the ozone concentration in the processing space S based on the detected value of the ozone concentration received from the ozone concentration sensor 20. Based on the calculated ozone concentration, the control unit 30A calculates a drive output value, which is a signal for causing the ozone generator 10 to generate ozone. The control unit 30A transmits the calculated drive output value to the ozone generating unit 10, and controls the amount of ozone generated by the ozone generating unit 10.
The control unit 30A determines that the concentration of the removal target object is equal to or less than a predetermined reference value and that the oxidation of the interfering substance present in the processing space S is completed based on the ozone concentration or the drive output value. Then, based on the relationship between the concentration of ozone after completion of the oxidation and time, the control unit 30A determines that the target treatment has been completed after the removal object has been removed to a value equal to or less than a predetermined reference value, and stops the ozone generating unit 10. In the present embodiment, as the relationship between the ozone concentration and time, for example, a CT value, which is an integrated value of the ozone concentration and time, is used. The control unit 30A can determine that the target process is completed when the removal object has been removed to a predetermined reference value or less based on the CT value.
The control unit 30A can determine that the oxidation of the interfering substance is completed when the rate of increase of the ozone concentration is equal to or higher than a predetermined rate.
The control unit 30A may store in the storage means a relation between the detected ozone concentration value or the drive output value and the completion of oxidation of the interfering substance for each type of the interfering substance. In this case, the control unit 30A can compare the stored value stored in the storage means with the actual measurement value measured by the ozone concentration sensor 20 or the driving output value of the ozone generating unit 10 to determine whether or not the oxidation of the interfering substance present in the processing space S is completed.
The control unit 30A may store in the storage means a relationship between the ozone concentration and time after the completion of the oxidation of the interfering substance and a relationship between the ozone concentration or time and the concentration of the removal target substance for each type of the removal target substance. In this case, the control unit 30A can compare the stored value stored in the storage means with a calculated value calculated based on the relationship between the ozone concentration after completion of the oxidation and time to determine whether or not the removal object present in the processing space S has been removed to a predetermined reference value or less and the target process has been completed. In the present embodiment, the control unit 30A preferably stores in the storage means a relationship between the CT value after completion of oxidation of the interfering substance and the concentration of the removal target in advance. In this case, the control unit 30A can compare the stored value stored in the storage means with the calculated value of the CT value after completion of the oxidation to determine whether or not the removal object existing in the processing space S is removed to a predetermined reference value or less.
The control unit 30A can generate ozone of a predetermined concentration, for example, high concentration or low concentration from the ozone generating unit 10 by controlling the ozone generating unit 10.
The low ozone concentration means a concentration in a range where the ozone concentration is not more than a reference value safe for the human body, and is not more than 0.1ppm, preferably not more than 0.05 ppm.
The high ozone concentration means a concentration higher than a reference value safe for a human body, and is, for example, about several ppm to several tens ppm. In order to efficiently remove the object to be removed, the concentration of ozone is preferably high, but there is a concern about the influence on the human body. Therefore, in the case of generating ozone of high concentration, it is desirable to confirm that no person is present in the processing space S and then to perform the process.
< ozone treatment method >)
Next, an example of an ozone treatment method for removing an object to be removed existing in the treatment space S by using the ozone treatment apparatus 1A having the above-described configuration will be described with reference to fig. 2. In fig. 2, the relationship between the ozone concentration and time after the completion of the oxidation of the interfering substance is described using the CT value after the completion of the oxidation of the interfering substance.
Fig. 2 is a flowchart illustrating the ozone treatment method. As shown in fig. 2, the control unit 30A operates the ozone generating unit 10 to generate ozone in the processing space S by the ozone generating unit 10 (step S11). When ozone is generated, the object to be removed in the air in the processing space S reacts with the ozone to be oxidized and decomposed.
Next, the ozone concentration sensor 20 measures the ozone concentration in the processing space S, and outputs an ozone concentration detection value to the control unit 30A. The control unit 30A calculates the ozone concentration in the processing space S based on the detected value of the ozone concentration sent from the ozone concentration sensor 20 (step S12).
Next, control unit 30A calculates the rate of increase in the ozone concentration per unit time based on the detected value of the ozone concentration output from ozone concentration sensor 20 (step S13).
Since ozone is consumed by reacting with the object to be removed within a predetermined time from the start of operation of the ozone generating section 10, the ozone concentration hardly fluctuates or small increases and decreases are repeated. For example, as shown in fig. 3, ozone is consumed by reacting with the removal object and the interfering substance until time T1, and ozone is supplied again from the ozone generating section 10 into the processing space S. Therefore, the ozone concentration in the processing space S is stable and hardly fluctuates until time T1, and the trend of increasing the ozone concentration per unit time is not seen. In fig. 3, although the ozone concentration is stable, there are cases where the increase and decrease of the ozone concentration are repeated. In this case, too, the ozone concentration is substantially constant from the start time of ozone generation to the time T1. The duration from the start time of ozone generation to the time T1, the value of the ozone concentration, the change in the ozone concentration, and the like depend on the concentration of the removal target and the interfering substance in the processing space S.
Then, at time T1, the amount of the interfering substance that reacts with ozone in the processing space S is reduced, almost eliminated or reduced, and thus the amount of ozone supplied increases relative to the amount of the remaining interfering substance. Therefore, after time T1, the ozone concentration in the processing space S continues to increase, and the rate of increase of the ozone concentration per unit time becomes large.
As a method for calculating the rate of increase in the ozone concentration per unit time, for example, as shown in fig. 3, a value of the rate of increase in the ozone concentration after the unit time Δt, an average value of the sum of the rates of increase in the ozone concentration at a plurality of times in the unit time Δt, a value of the rate of increase in the ozone concentration at a time intermediate the unit time Δt, and the like can be used.
Next, the control unit 30A determines whether or not the calculated rate of increase in the ozone concentration per unit time is equal to or higher than a predetermined rate (step S14).
In the present embodiment, the predetermined speed is appropriately selected according to the types of the removal target and the interfering substance, the initial concentrations of the removal target and the interfering substance, and the like.
In step S14, when the rate of increase in the ozone concentration per unit time is smaller than the predetermined rate (step S14: NO), the control unit 30A determines that the interfering substance that reacts with ozone in the treatment space S is present at a concentration exceeding that at which it can be determined that the oxidation is completed, and measures the ozone concentration in the treatment space S again by the ozone concentration sensor 20 (step S12).
In step S14, when the rate of increase of the ozone concentration per unit time is equal to or higher than a predetermined rate (step S14: yes), the control unit 30A determines that only the interfering substances that react with ozone in the processing space S are present at a concentration that can be determined to be the completion of oxidation or less, and calculates an integrated value (CT value) of the ozone concentration and time (step S15).
In the present embodiment, the CT value may be appropriately selected according to the type of the object to be removed, the type of the interfering substance, and the like. In addition, when the initial concentrations of the removal object and the interfering substance are known, the determination may be appropriately made according to the initial concentrations of the removal object and the interfering substance.
Next, the control unit 30A determines whether or not the CT value is equal to or greater than a predetermined value (step S16). When the CT value is smaller than the predetermined value (step S16: no), the control unit 30A determines that the removal target object has a concentration that is equal to or lower than the ozone oxidation level, and calculates the CT value again with a high possibility that the concentration of the removal target object exceeds the predetermined reference value (step S15).
When the CT value is equal to or higher than the predetermined value (yes in step S16), the control unit 30A determines that the objects to be removed in the processing space S are decomposed to a state where little ozone is consumed, or that all the objects to be removed are decomposed, and the concentration of the objects to be removed is equal to or lower than a predetermined reference value, and stops the operation of the ozone generating unit 10, and stops the generation of ozone (step S17).
Thus, the ozone treatment apparatus 1A can stop the generation of ozone at an optimal timing, and thus can suppress the generation of excessive ozone in the ozone generating section 10 while decomposing the removal object and the interfering substance in the treatment space S.
When the operation of the ozone generating section 10 is stopped, the supply of ozone from the ozone generating section 10 to the processing space S is stopped, and thus, newly generated ozone is not present in the processing space S. Since ozone in the processing space S naturally decomposes, as shown in fig. 3, when the operation of the ozone generating section 10 is stopped at time T2, the ozone concentration in the processing space S decreases after time T2.
In the present embodiment, the ozone generating unit 10 is stopped, and the ozone concentration in the processing space S is gradually reduced without generating ozone. Further, since the ozone concentration in the space S may be reduced, the ozone generation unit 10 may not be stopped, but the ozone generation unit 10 may be switched from the generation of high-concentration ozone to the generation of low-concentration ozone, and the control of gradually reducing the ozone concentration may be performed.
As described above, ozone treatment apparatus 1A includes ozone generating section 10, ozone concentration sensor 20, and control section 30A. The control unit 30A determines that the oxidation of the interfering substance present in the processing space S is completed based on the ozone concentration, and determines that the target process is completed when the removal target object is removed to a value equal to or less than a predetermined reference value based on the CT value after the completion of the oxidation. By ozone treatment to a predetermined CT value, the removal target and the interfering substance can be reliably decomposed to a state where little ozone is consumed, regardless of the initial removal target concentration and the presence or absence of the interfering substance, and the removal target and the interfering substance concentration can be reduced to a predetermined value or less that is allowable. Thus, even when the interfering substance is present in the processing space S, the ozone processing apparatus 1A can reduce the concentration of the object to be removed to a predetermined value or less, thereby performing the target processing.
In the method of determining removal of the removal object by the CT value of the reference only, it can be said that, when the treatment space S contains the interfering substance, the removal object and the interfering substance cannot be decomposed reliably by ozone until the state where the ozone is almost consumed. In addition, there is a method of observing the time when the oxidation of the removal object is completed by the change in the ozone concentration without knowing the concentration of the removal object existing in the processing space S. However, in this method, when the treatment space S contains the interfering substance, the object to be removed and the interfering substance cannot be decomposed with ozone reliably until the state where almost no ozone is consumed.
On the other hand, in the present embodiment, since completion of the target process is determined based on the CT value after completion of oxidation of at least one of the removal target object and the interfering substance existing in the processing space S, even if the interfering substance is contained in the processing space S, ozone generation can be stopped at an optimal timing regardless of the concentration of the removal target object, and generation of excessive ozone can be suppressed. Therefore, for example, when the concentration of the object to be removed is high, the ozone treatment is performed for a longer period of time than expected, and therefore, the object to be removed and the interfering substance can be decomposed with high accuracy to a state where little ozone is consumed, compared with the case where the object to be removed is judged only by the CT value of the reference. In addition, even when the concentration of the removal object is low, the generation of ozone can be stopped early while taking into consideration the presence of the interfering substance. Further, in the case where there is no interfering substance in the processing space S, both the case where the initial concentration of the object to be removed is large and the case where the initial concentration is small can be appropriately handled, and the object to be removed can be reliably decomposed into a state where little ozone is consumed by ozone.
In addition, the ozone treatment apparatus 1A can suppress the generation of excessive ozone in the ozone generating section 10, and therefore can reduce unnecessary consumption of energy, and can reduce unnecessary long-time ozone generation.
In the ozone treatment apparatus 1A, the control unit 30A can determine that the oxidation of the interfering substance is completed when the rate of rise of the detected value of the ozone concentration is equal to or higher than a predetermined rate. This makes it possible to easily confirm that the removal object and the interfering substance are decomposed by ozone to a state where little ozone is consumed. Thus, the ozone treatment apparatus 1A can perform the target treatment more accurately and easily.
In the present embodiment, it is also possible to determine that the oxidation of at least one of the removal target object and the interfering substance is completed based on the drive output value of the ozone generating unit 10 instead of the ozone concentration.
Second embodiment
An ozone treatment apparatus according to a second embodiment of the present invention will be described. Fig. 4 is a schematic configuration diagram showing an ozone treatment apparatus according to the present embodiment. As shown in fig. 4, the ozone treatment apparatus 1B according to the present embodiment is provided with an ozone concentration sensor 20, an ozone generating unit 10, and a control unit 30B, which are provided in a treatment space S, in place of the control unit 30A of the ozone treatment apparatus 1A according to the first embodiment described above. In this embodiment, the configuration of the control unit 30B is only described, except for the configuration of the control unit 30B, as in the ozone treatment device 1A of the first embodiment.
Instead of determining that the oxidation of the interfering substance is completed when the rate of increase of the ozone concentration is equal to or higher than the predetermined rate in the control unit 30A, the control unit 30B may calculate the driving output value so that the ozone concentration in the treatment space S approaches the target value of the ozone concentration, and feed back the driving output value to the ozone generating unit 10 to control the ozone generating unit 10. When the drive output value is maintained within a predetermined range for a predetermined period of time, the control unit 30B determines that the oxidation of the interfering substance is completed.
Fig. 5 is a diagram showing an example of a relationship between time and a drive output value of the ozone generating section 10. As shown in fig. 5, when the removal object is contained in the processing space S, the drive output value is increased so that, for example, high-concentration ozone is generated from the ozone generating section 10. Ozone is consumed by reacting with the removal object and the interfering substance from the start of operation of the ozone generating section 10 to the time T1, and ozone is newly supplied from the ozone generating section 10 into the processing space S. Therefore, the ozone concentration in the processing space S is stable and hardly fluctuates until time T1, and the trend of fluctuation of the ozone concentration is not seen in the unit time. In fig. 5, although the driving output value is stable, the driving output value may be repeatedly increased or decreased. In this case, too, the drive output value becomes substantially constant from the start time of ozone generation to the time T1. The duration from the start time of ozone generation to the time T1, the value of the drive output value, the variation of the drive output value, and the like depend on the concentration of the removal target and the interfering substance in the processing space S.
Then, at time T1, the amount of the interfering substances that react with ozone in the processing space S is reduced, almost eliminated or reduced, so that the necessary amount of ozone to be supplied is reduced with respect to the amount of the remaining interfering substances. Therefore, after the time T1, the amount of the interfering substances present in the processing space S decreases as time passes, and thus the necessary amount of ozone decreases. Therefore, the driving output value of the ozone generating section 10 is also reduced. Then, at time T2, when the concentration of the interfering substance is reduced to a predetermined value or less which is allowed by the total or almost no ozone depletion state of the interfering substance, the driving output value of the ozone generating section 10 is maintained in a low state. After the drive output value of the ozone generating section 10 is maintained in a low state within a predetermined range for a predetermined time, at time T3, the drive output value becomes zero when the operation of the ozone generating section 10 is stopped.
Instead of determining based on the drive output value of the ozone generating unit 10, the control unit 30B may determine whether or not the removal object has been removed to a predetermined reference value or less based on the drive time of the ozone generating unit 10 after the oxidation of the interfering substance has been completed.
< ozone treatment method >)
Next, an example of an ozone treatment method for removing an object to be removed existing in the treatment space S by using the ozone treatment apparatus 1B having the above-described configuration will be described with reference to fig. 6.
Fig. 6 is a flowchart illustrating the ozone treatment method. As shown in fig. 6, the control unit 30B operates the ozone generating unit 10 to generate ozone in the processing space S by the ozone generating unit 10 (step S21). Step S21 is the same as step S11 of the ozone treatment method of the ozone treatment device 1A according to the first embodiment shown in fig. 2, and therefore, the description thereof is omitted.
Next, the control unit 30B calculates a drive output value so that the ozone concentration in the processing space S approaches the ozone concentration target value, and feeds back the drive output value to the ozone generating unit 10 to control the ozone generating unit 10 (step S22).
Regarding the drive output value, since it is necessary to increase the amount of ozone generated from the ozone generating section 10 in order to increase the concentration of ozone in the processing space S, the drive output value becomes large. On the other hand, in the case where the concentration of ozone in the processing space S can be small, the amount of ozone generated from the ozone generating section 10 can be small, and thus the drive output value becomes small. The control unit 30B calculates the drive output value so that the ozone concentration in the processing space S approaches the ozone concentration target value, and feedback-controls the ozone generating unit 10, whereby the amount of ozone generated can be more reliably adjusted.
Next, the control unit 30B determines whether or not the drive output value is maintained within the predetermined range for a predetermined time (step S23).
The predetermined time may be appropriately selected according to the type, concentration, and the like of the object to be removed. The predetermined range may be appropriately selected according to the type, concentration, and the like of the object to be removed.
In step S23, when the drive output value is not maintained within the predetermined range for a predetermined period of time (step S23: NO), the control unit 30B determines that the interfering substance that reacts with ozone in the processing space S is present in excess of the concentration that can be determined to be oxidation-completed, calculates the drive output value again so that the ozone concentration in the processing space S approaches the ozone concentration target value, feeds back to the ozone generating unit 10, and controls the ozone generating unit 10 (step S22).
In step S23, when the drive output value is maintained within the predetermined range for a predetermined period of time (step S23: yes), the control unit 30B determines that the interfering substance reacting with ozone in the processing space S is not more than a concentration at which it can be determined that the oxidation is completed, and calculates the accumulated time (step S24). The accumulated time is from the time when the operation of the ozone generating section 10 starts to the time when the drive output value is sensed.
Next, the control unit 30A determines whether or not the accumulated time is equal to or longer than a predetermined time (step S25).
When the accumulation time is shorter than the predetermined time (step S25: no), the control unit 30B determines that the removal target object has a concentration that can oxidize with ozone, and the concentration of the removal target object is highly likely to exceed the predetermined reference value, and calculates the accumulation time again.
When the accumulation time is equal to or longer than the predetermined time (yes in step S25), the control unit 30B determines that the objects to be removed in the processing space S are decomposed to a state where little ozone is consumed, or that all the objects to be removed are decomposed, and that the concentration of the objects to be removed is equal to or lower than a predetermined reference value, stops the operation of the ozone generating unit 10, and stops the generation of ozone (step S26).
Thus, the ozone treatment apparatus 1B can stop the generation of ozone at an optimal timing, similarly to the ozone treatment apparatus 1A, and can thus suppress the generation of excessive ozone in the ozone generating section 10 while decomposing the removal object and the interfering substance in the treatment space S.
In the ozone treatment method using the ozone treatment device 1B, instead of the judgment based on the driving output value of the ozone generating section 10, it may be judged whether or not the removal object is removed to a predetermined reference value or less based on the driving time of the ozone generating section 10 after the completion of the oxidation of the interfering substance.
In this way, the ozone treatment apparatus 1B calculates the driving output value by the control unit 30B so that the ozone concentration approaches the predetermined ozone concentration target value, controls the ozone generating unit 10, and determines that the oxidation of the interfering substance is completed when the driving output value is maintained within a predetermined range for a predetermined time. Then, the ozone treatment apparatus 1B generates ozone from the ozone generating section 10 by the control section 30B until the driving output value is maintained within a predetermined range for a predetermined time, thereby removing the object to be removed to a predetermined reference value or less, and completing the target treatment. Thus, the ozone treatment device 1B can reliably decompose the removal object and the interfering substance to a state where little ozone is consumed, regardless of the initial removal object concentration and the presence or absence of the interfering substance, and can reduce the removal object concentration and the interfering substance concentration to a predetermined value or less that is allowable. Thus, the ozone treatment apparatus 1B can perform the target treatment by reducing the concentration of the removal target object to a predetermined value or less even when the interfering substance is present in the treatment space S, similarly to the ozone treatment apparatus 1A.
Third embodiment
A reporting device according to a third embodiment of the present invention will be described. Fig. 7 is a schematic configuration diagram showing the reporting device of the present embodiment. As shown in fig. 7, the notification device 2 according to the present embodiment is provided with an ozone concentration sensor 20, a determination unit 40, and a notification unit 50, in which the ozone generating unit 10 and the control unit 30A in the ozone treatment device 1A according to the first embodiment are changed to the determination unit 40 and the notification unit 50, respectively. The reporting device 2 measures the concentration of ozone in the processing space S while removing the removal target and the interfering substance present in the processing space S by using ozone generated by the ozone generating unit 10 provided independently of the reporting device 2, and reports that the target process is completed after the concentration of the removal target and the interfering substance is reduced to a predetermined value or less that is allowed.
The ozone concentration sensor 20 is the same as the ozone concentration sensor 20 provided in the ozone treatment apparatus 1A of the first embodiment, and therefore, the description thereof is omitted.
The determination unit 40 determines that the oxidation of the interfering substance present in the processing space S is completed based on the measured ozone concentration, and determines that the target process is completed when the removal target object is removed to a value equal to or less than a predetermined reference value based on the relationship between the ozone concentration after the completion of the oxidation and time. In the present embodiment, as a relationship between the ozone concentration and time, for example, a determination is made that the removal target object has been removed to a predetermined reference value or less based on an integrated value (CT value) of the ozone concentration and time after completion of the oxidation, and the target process has been completed.
The determination unit 40 can determine that the target process is completed when the removal object has been removed to a value equal to or less than a predetermined reference value, and can drive the reporting unit 50.
The reporting unit 50 has a function of reporting that the target process is completed when the removal object is removed to a predetermined reference value or less. The reporting unit 50 can report completion of the target process by display, output of sound, generation of vibration, or the like. As the report section 50, a monitor, an alarm, vibration, or the like can be used.
< reporting method >)
Next, an example of a reporting method for reporting completion of the target processing using the reporting apparatus 2 having the above-described configuration will be described with reference to fig. 8. Here, the ozone generating unit 10 is operated in the processing space S to generate ozone by the ozone generating unit 10. In fig. 8, a case of using a CT value after completion of oxidation of an interfering substance will be described as a relationship between ozone concentration after completion of oxidation of the interfering substance and time.
Fig. 8 is a flowchart illustrating the reporting method. As shown in fig. 8, the ozone concentration sensor 20 measures the ozone concentration in the processing space S, outputs an ozone concentration detection value, and sends the ozone concentration detection value to the determination unit 40. The determination unit 40 calculates the ozone concentration in the processing space S based on the detected value of the ozone concentration sent from the ozone concentration sensor 20 (step S31). Step S31 is the same as step S12 of the ozone treatment method of the ozone treatment apparatus 1A according to the first embodiment shown in fig. 2 described above, and therefore, the description thereof is omitted.
Next, the determination unit 40 calculates the rate of increase in the ozone concentration per unit time based on the detected value of the ozone concentration output from the ozone concentration sensor 20 (step S32). Step S32 is the same as step S13 of the ozone treatment method of the ozone treatment apparatus 1A according to the first embodiment shown in fig. 2 described above, and therefore, the description thereof is omitted.
Next, the determination unit 40 determines whether or not the calculated rate of increase in the ozone concentration per unit time is equal to or greater than a predetermined rate (step S33). Step S33 is the same as step S14 of the ozone treatment method of the ozone treatment device 1A according to the first embodiment shown in fig. 2, and therefore, the description thereof is omitted.
In step S33, when the rate of increase of the ozone concentration per unit time is smaller than the predetermined rate (step S33: NO), the determination unit 40 determines that the interfering substance that reacts with ozone in the processing space S is present at a concentration exceeding that at which it can be determined that the oxidation is completed, and measures the ozone concentration in the processing space S again by the ozone concentration sensor 20 (step S32).
In step S33, when the rate of increase of the ozone concentration per unit time is equal to or higher than a predetermined rate (step S33: yes), the determination unit 40 determines that only the interfering substances that react with ozone in the processing space S are present at a concentration that can be determined to be the completion of oxidation or lower, and calculates an integrated value (CT value) of the ozone concentration and time (step S34).
Next, the determination unit 40 determines whether or not the CT value is equal to or greater than a predetermined value (step S35). When the CT value is smaller than the predetermined value (step S35: no), the determination unit 40 determines that the removal target object having a concentration that is capable of oxidizing with ozone remains, and the concentration of the removal target object is highly likely to exceed the predetermined reference value, and calculates the CT value again (step S34).
When the CT value is equal to or higher than the predetermined value (yes in step S35), the determination unit 40 determines that the removal object in the processing space S is decomposed to a state where almost no ozone is consumed or that all the removal objects are decomposed and the concentration of the removal object is equal to or lower than the predetermined reference value, and sends a signal to the report unit 50. Then, the report unit 50 reports that the processing of the removal object and the interfering substance in the processing space S is completed (step S36).
Thereby, the reporting device 2 can notify the following: the object to be removed and the interfering substance are reliably decomposed to a state where little ozone is consumed, and the concentrations of the object to be removed and the interfering substance are reduced to a predetermined value or less that is allowable. Therefore, if the reporting device 2 is used, it is possible to notify that the ozone generation can be stopped at an optimal timing, and therefore, the amount of ozone that is excessively generated can be reduced while decomposing the removal object and the interfering substance in the processing space S.
As described above, the reporting device 2 includes the ozone concentration sensor 20 and the determination unit 40, and the determination unit 40 determines that the oxidation of the interfering substance present in the processing space S is completed based on the measured ozone concentration. Then, the determination unit 40 determines that the target process is completed after the removal object has been removed to a predetermined reference value or less based on the CT value after the oxidation of the interfering substance has been completed. Thus, even when the interfering substance exists in the processing space S, the reporting device 2 can reduce the concentration of the removal target object to a predetermined value or less and notify that the target process is completed.
The reporting device 2 may further include a reporting unit 50. Thus, the reporting device 2 can simply notify the person that the process of removing the object is completed by display, sound, vibration, or the like.
As described above, in the case where the objects to be removed present in the processing space S are viruses, bacteria, and the like, the ozone treatment apparatuses 1A and 1B and the reporting apparatus 2 are described, and as described above, the objects to be removed in the processing space S can be removed without generating ozone more than necessary at an optimal time. Accordingly, the ozone treatment apparatuses 1A and 1B and the reporting apparatus 2 can be installed in a room of a building such as a house, a building, a hospital, a welfare facility, etc., in a car such as a car, an electric car, etc., in an aircraft, etc., and can be suitably used as an apparatus for cleaning air by removing objects to be removed existing in the space thereof. In particular, the ozone treatment apparatuses 1A and 1B and the reporting apparatus 2 can reduce the waste of time required for removing the object by ozone treatment. Therefore, when the number of patients and facility users increases in hospitals, welfare facilities, and the like, the time required for removing viruses and bacteria can be minimized and reliably performed for each ward and room in the hospitals and welfare facilities, and therefore, the removal of viruses and bacteria can be efficiently performed for all the ward and room in the hospitals and welfare facilities.
As described above, the embodiments have been described, but the embodiments are presented as examples, and the present invention is not limited to the embodiments. The above-described embodiments can be implemented in various other modes, and various combinations, omissions, substitutions, modifications, and the like can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and their equivalents.
The present application claims that the entire contents of japanese patent application nos. 2020-141923 are incorporated into the present application based on the priority of japanese patent application nos. 2020-141923 filed to the japanese patent office on 25 th month of 2020.
Description of the reference numerals
1A, 1B ozone treatment device
2. Reporting device
10. Ozone generating part
20 ozone concentration measuring unit (ozone concentration sensor)
30A, 30B control part
40. Determination unit
50. Report part
S processing space
Claims (6)
1. An ozone treatment device, comprising:
an ozone generating unit for generating ozone in the processing space;
an ozone concentration measuring unit configured to measure an ozone concentration in the processing space; and
a control unit for calculating a drive output value of the ozone generating unit based on the measured ozone concentration,
the control unit determines that the removal object has been removed to a predetermined reference value or less based on a relationship between the ozone concentration and time after completion of the oxidation after the completion of the oxidation by determining that the oxidation of the interfering substances other than the removal object has been completed based on the ozone concentration or the drive output value.
2. The ozone treatment device according to claim 1, wherein,
when the rate of increase of the ozone concentration is equal to or higher than a predetermined rate, the control unit determines that the oxidation of the interfering substance is completed.
3. The ozone treatment device according to claim 1, wherein,
the control part calculates the driving output value so that the ozone concentration approaches a prescribed ozone concentration target value, and controls the ozone generating part,
when the drive output value is maintained within a predetermined range for a predetermined period of time, the control unit determines that the oxidation of the interfering substance is completed.
4. The ozone treatment device according to claim 3, wherein,
the control unit determines that the removal object has been removed to a predetermined reference value or less based on a driving time of the ozone generating unit after the completion of the oxidation.
5. A reporting device is provided with:
an ozone concentration measuring unit for measuring the concentration of ozone in the processing space; and
and a determination unit that, after determining that oxidation of an interfering substance other than the removal target object is completed based on the measured ozone concentration, determines that the removal target object has been removed to a predetermined reference value or less based on a relationship between the ozone concentration after completion of the oxidation and time.
6. The reporting device of claim 5, wherein,
comprises a reporting unit for reporting that the object to be removed has been removed to a predetermined reference value or less,
the determination unit determines that the removal object has been removed to a predetermined reference value or less, and drives the reporting unit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-141923 | 2020-08-25 | ||
| JP2020141923 | 2020-08-25 | ||
| PCT/JP2021/019785 WO2022044457A1 (en) | 2020-08-25 | 2021-05-25 | Ozone treatment apparatus and notification apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116056736A true CN116056736A (en) | 2023-05-02 |
Family
ID=80353085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180058103.1A Pending CN116056736A (en) | 2020-08-25 | 2021-05-25 | Ozone treatment device and reporting device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2022044457A1 (en) |
| CN (1) | CN116056736A (en) |
| WO (1) | WO2022044457A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0537245U (en) * | 1991-10-23 | 1993-05-21 | 東亜電波工業株式会社 | Ozone deodorizer / sterilizer |
| EP1503809A4 (en) * | 2002-05-01 | 2005-11-16 | Smart Air Inc | Air sterilizer using ozone |
| JP2007020904A (en) * | 2005-07-19 | 2007-02-01 | Seiko Giken:Kk | Deodorant filter system |
| JP2010235041A (en) * | 2009-03-31 | 2010-10-21 | Mazda Motor Corp | Vehicular air cleaning control device |
| JP2012034771A (en) * | 2010-08-05 | 2012-02-23 | Tamura Teco:Kk | Ozone sterilizer |
| JP7066755B2 (en) * | 2018-02-02 | 2022-05-13 | アルプスアルパイン株式会社 | Air purifier and air purifying method |
-
2021
- 2021-05-25 CN CN202180058103.1A patent/CN116056736A/en active Pending
- 2021-05-25 JP JP2022545319A patent/JPWO2022044457A1/ja active Pending
- 2021-05-25 WO PCT/JP2021/019785 patent/WO2022044457A1/en active Application Filing
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| JPWO2022044457A1 (en) | 2022-03-03 |
| WO2022044457A1 (en) | 2022-03-03 |
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