JP2022138684A - Ozone generation controller - Google Patents

Abstract

To provide an ozone generation controller that can accurately determine completion of treatment of an object.SOLUTION: An ozone generation controller comprises: an ozone supply unit which supplies ozone into a target space; an ozone detection unit which detects ozone inside the target space and outputs an ozone concentration value; and a control unit which controls driving of the ozone supply unit on the basis of the ozone concentration value. The control unit determines that treatment of an object inside the target space has not been completed when the reduction speed of the ozone concentration value after the driving of the ozone supply unit is stopped is large, and determines that treatment of the object inside the target space has been completed when the reduction speed is small.SELECTED DRAWING: Figure 1

Description

The present invention relates to an ozone generation control device.

Ozone has a strong oxidizing power, so for the purpose of deodorizing, removing organic matter, removing harmful substances, sterilizing, etc., the amount of ozone generated is controlled according to the concentration of the object to be treated, and the ozone oxidizes the object. Ozone generation control devices that remove (deodorize) and sterilize are used in various fields.

As an ozone generation control device, for example, a cleaning unit that generates ozone and decomposes and removes odorous components contained in the air in the space, a purification substance generation unit that generates ozone, and detects the ozone concentration in the air. and a controller for controlling the amount of ozone generated in accordance with the ozone concentration detected by the concentration sensor (see, for example, Patent Document 1). In this air cleaner, when the ozone concentration per unit time in the space increases at a predetermined rate, the operation of the purification substance generator is stopped to stop the generation of ozone.

WO2019-150735

However, with the technique of Patent Document 1, the rate of increase in ozone concentration may not correspond to the processing status of an object such as odorous components, so it is difficult to accurately determine the completion of processing of the object. There was a problem.

If the rate of ozone concentration increase does not correspond to the processing status of the object, for example, the rate of supply of ozone is much greater than the rate of consumption of ozone by the object, or the oxidation reaction of the object by ozone is slow. In some cases, the change in the rate of increase in ozone concentration is small. In addition, when the ozone generation is on/off controlled so that the ozone concentration becomes a constant value, increasing the supply amount of ozone may reduce the change in the increase speed of the ozone concentration.

An object of one aspect of the present invention is to provide an ozone generation control device capable of determining the completion of processing of an object with high accuracy.

One aspect of the ozone generation control apparatus according to the present invention includes an ozone supply unit that supplies ozone into a target space, an ozone detection unit that detects ozone in the target space and outputs an ozone concentration value, and the ozone concentration. and a control unit for driving and controlling the ozone supply unit based on the value, wherein the control unit controls the reduction rate of the ozone concentration value after stopping the driving of the ozone supply unit. When is large, it is determined that the processing of the object in the object space is not completed, and when the decreasing speed is small, it is determined that the processing of the object in the object space is completed.

Another aspect of the ozone generation control device according to the present invention includes an ozone supply unit that supplies ozone into a target space, an ozone detection unit that detects ozone in the target space and outputs an ozone concentration value, and the ozone and a control unit for driving and controlling the ozone supply unit based on the concentration value, wherein the control unit reduces the ozone concentration value after stopping the driving of the ozone supply unit. When the speed is high, it is determined that the processing of the object in the object space has not progressed to a predetermined level, and when the speed of decrease is small, it is determined that the processing of the object in the object space has progressed to the predetermined level. do.

One aspect of the ozone generation control device according to the present invention can determine the completion of the processing of the object with high accuracy.

1 is a schematic configuration diagram showing an ozone generation control device according to a first embodiment; FIG. FIG. 4 is an explanatory diagram showing the relationship between time and ozone concentration; It is a flow chart explaining an ozone processing method. FIG. 4 is a flow chart showing the operation of the ozone treatment step (step S11) in FIG. 3. FIG. FIG. 5 is a schematic configuration diagram showing an ozone generation control device according to a second embodiment; It is a flow chart explaining an ozone processing method. FIG. 11 is a schematic configuration diagram showing an ozone generation control device according to a third embodiment; It is a flow chart explaining an ozone processing method. FIG. 11 is a schematic configuration diagram showing an ozone generation control device according to a fourth embodiment; It is a flow chart explaining an ozone processing method. FIG. 11 is a schematic configuration diagram showing an ozone generation control device according to a fifth embodiment; It is a flow chart explaining an ozone processing method.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail. In addition, in order to facilitate understanding of the description, the same components are denoted by the same reference numerals in each drawing, and overlapping descriptions are omitted. Also, the scale of each member in the drawings may differ from the actual scale. Unless otherwise specified, "-" indicating a numerical range in this specification means that the numerical values before and after it are included as lower and upper limits.

[First embodiment]
<Ozone generation controller>
An ozone generation control device according to a first embodiment of the present invention will be described. It is assumed that an object is included in the target space in which the ozone generation control device is installed.

In this embodiment, the target space is a closed space where air is not present, such as a house, a building, a hospital, a building such as a welfare facility, an automobile, a vehicle such as a train, an indoor space such as an airplane, or the like. It refers to the atmosphere that exists. A closed space includes a space that can be regarded as substantially closed, and air may or may not circulate.

Objects refer to volatile organic compounds (VOCs), odor components, bacteria, viruses, and the like. The malodorous component refers to a malodorous substance, a volatile organic compound, and the like, and includes trimethylamine, methyl mercaptan, NH ₃ , H ₂ S, and the like.

FIG. 1 is a schematic configuration diagram showing an ozone generation control device according to this embodiment. As shown in FIG. 1, the ozone generation control device 1A includes an ozone supply section 10, an ozone concentration sensor ₂₀ as an ozone detection section, and a control section 30A. and a notification unit 70 may be provided. 1 A of ozone generation control apparatuses are installed in the target space S. As shown in FIG. The ozone generation control device 1A brings an object present in the target space S into contact with ozone (O ₃ ), oxidatively decomposes the object with ozone, and removes the object, thereby reducing the concentration of the object to a permissible value or less. to clean the air in the symmetrical space S.

The ozone generation control device 1A performs feedback control on the operation of the ozone supply unit 10 so that the ozone concentration in the target space S is maintained within a predetermined range when removing the target object present in the target space S. . The ozone generation control device 1A judges that the removal of the object in the object space S is completed based on the rate of decrease of the ozone concentration when the operation of the ozone supply unit 10 is stopped. be.

In general, the conventional technology can control the ozone concentration in the space within a predetermined range, but during the ozone generation, the target object, such as the deodorization rate of bad odors, the sterilization rate of bacteria and viruses, etc. It is difficult to grasp the processing condition. Therefore, in the conventional technology, even if the removal of the object (deodorization, sterilization, etc.) is sufficiently completed, the generation of ozone and the control of the ozone concentration in the space are often continued. In addition, when removing objects (deodorization, sterilization, etc.) in a manned environment, even if the ozone concentration is safe, people in the space will be exposed to unnecessary ozone. It is also possible that you can smell it.

By estimating the ozone consumption amount based on the rate of decrease of the ozone concentration, the ozone generation control device 1A can remove the target object in the target space S (deodorization, sterilization, etc.) until the target concentration becomes equal to or less than a predetermined target concentration. It can be grasped in real time that the air in the target space S is purified.

Each configuration of the ozone generation control device 1A will be described.

The ozone supply unit 10 generates ozone within the target space S using oxygen in the air within the target space S as a raw material, and supplies the ozone within the target space S. The ozone supply unit 10 is electrically connected to the control unit 30A and controlled by the control unit 30A. The ozone supply unit 10 can generate ozone based on a drive signal sent from the control unit 30A.

Any type of ozone supply unit 10 can be used as long as it can generate ozone. As the ozone supply unit 10, for example, a device for generating ozone using a discharge method in which discharge electrodes and counter electrodes are alternately arranged facing each other, ozone using a photochemical reaction method using ultraviolet rays. can be used.

In an apparatus that generates ozone using a discharge method, a voltage is applied to both electrodes to generate discharge between the electrodes. Oxygen contained in the air is activated by passing air between the electrodes generating the discharge, and part of the dissociated or excited oxygen changes to ozone (O ₃ ). This creates ozone in the air. The generated ozone reacts with objects contained in the air in the target space S to decompose and remove the objects. The amount of ozone generated in the ozone supply unit 10 (ozone generation amount) can be controlled to increase/decrease, operate, stop, etc. by adjusting the discharge amount by adjusting the drive signal output from the control unit 30A. .

As an apparatus for generating ozone using a photochemical reaction method using ultraviolet rays, an ultraviolet irradiation apparatus equipped with 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 that can emit light that does not contain the ozone decomposition wavelength.

The ozone concentration sensor 20 measures the ozone concentration within the target space S. The ozone concentration sensor 20 outputs a detection value (ozone concentration value) corresponding to the measured ozone concentration. The ozone concentration sensor 20 is electrically connected to the control section 30A, and transmits an ozone concentration detection signal (concentration signal) corresponding to the ozone concentration value to the control section 30A.

The ozone concentration sensor 20 is not particularly limited and can be selected as appropriate. As the ozone concentration sensor 20, for example, a semiconductor sensor or the like having a semiconductor element as a gas sensitive portion made of a metal oxide semiconductor material can be used. In the semiconductor sensor, the ozone concentration is measured by detecting the amount of change in the resistance value of the semiconductor element caused by ozone contacting the surface of the semiconductor element, and a voltage signal corresponding to the ozone concentration is output as the ozone concentration value. It is something to do.

The control unit 30A is connected to each member constituting the ozone generation control device 1A such as the ozone supply unit 10 so as to be controllable. The control unit 30A has storage means for storing control programs and various types of storage information, and calculation means for operating based on the control programs. The control unit 30A is realized by reading out and executing a control program or the like stored in the storage means by the calculation means.

The control unit 30A performs drive control of the ozone supply unit 10 based on the ozone concentration value measured by the ozone concentration sensor 20, and controls the amount of ozone generated by the ozone supply unit 10. FIG. Specifically, the controller 30</b>A receives a concentration signal corresponding to the ozone concentration value, which is the measurement result of the ozone concentration measured by the ozone concentration sensor 20 . The controller 30A calculates the ozone concentration in the target space S based on the concentration signal received from the ozone concentration sensor 20. FIG. The control unit 30A calculates a drive output value for generating ozone in the ozone supply unit 10 based on the calculated ozone concentration. The controller 30</b>A transmits a drive signal corresponding to the calculated drive output value to the ozone supply unit 10 to control the amount of ozone generated by the ozone supply unit 10 . Further, the control unit 30A may control the ozone supply unit 10 to generate ozone of a predetermined concentration from the ozone supply unit 10 .

The ozone concentration may be any concentration within a range of a standard value or less that is safe for the human body, and can be appropriately set according to the size of the symmetrical space S, the type, number, concentration, and the like of the objects. The ozone concentration is preferably 0.1 ppm or less, for example.

The control unit 30A determines that the processing of the object in the target space S is not completed when the rate of decrease of the ozone concentration value after stopping the driving of the ozone supply unit 10 is high, and determines that the processing of the object in the target space S is not completed when the rate of decrease is low. Determine that the objects in S have been processed. That is, the control unit 30A makes a determination based on the amount of change in the rate of decrease of the ozone concentration value per unit time from when the operation of the ozone supply unit 10 is stopped until when the operation is restarted. If the rate of decrease of the ozone concentration value after stopping the operation of the ozone supply unit 10 exceeds a predetermined reference value, the control unit 30A determines that the processing of the object in the object space S is not completed, When the speed of decrease of the density value is equal to or less than a predetermined reference value, it is determined that the processing of the object in the object space S is completed.

Note that the reference value is not particularly limited, and is appropriately set according to the type of the object.

The control unit 30A can start driving the ozone supply unit 10 when the ozone concentration value becomes equal to or less than the start threshold value, and can stop driving the ozone supply unit 10 when the ozone concentration value becomes equal to or more than the stop threshold value.

The starting threshold value can be appropriately set to an arbitrary ozone concentration value according to the type of object and the like. The threshold for stopping is an ozone concentration value higher than the threshold for starting, and can be appropriately set to an arbitrary ozone concentration value according to the type of object. The start threshold and stop threshold may be concentration values that maintain the ozone concentration in the target space S at a safe concentration. For example, the start threshold is 0.08 ppm, and the stop threshold is 0.1 ppm. good too.

An example of the relationship between the measurement time of the ozone concentration sensor 20 and the ozone concentration in the target space S is shown in FIG. As shown in FIG. 2, when an object or the like exists in the processing space S and the air in the processing space S is polluted, the off time T _off during which the ozone supply unit 10 is stopped is set to It is assumed that time t1 and the on _- time T _on during which the ozone supply unit ₁₀ is driven is time t11. When the processing space S is in a clean state with almost no objects, etc., the OFF time T _off is set to time t ₀ and the ON time T _on is set to time t ₁₀ . Let C11 be the ozone concentration value when the ozone concentration is the starting threshold value, and let C12 be the ozone concentration value when the ozone concentration is the stopping threshold value. The ozone concentration in the target space S is maintained at a safe concentration (eg, 0.08 ppm to 0.1 ppm) between the start threshold and stop threshold.

Ozone reduction rate during the OFF time T _off (time t ₁ ) when the air in the processing space S is polluted (ozone reduction during the period from the start threshold value C11 to the stop threshold value C12) speed) is the rate of decrease of ozone during the OFF time T _off (time t ₀ ) when the inside of the processing space S is cleaned (the time from the start threshold value C11 to the stop threshold value C12 for the ozone concentration value ozone depletion rate).

That is, during the _OFF time Toff, ozone reacts with the object to be treated and is consumed, and no new ozone is supplied from the ozone supply unit 10, so the ozone concentration decreases. If the object remains in the target space S, the _ozone concentration in the target space S further decreases. becomes even larger. Therefore, if the rate of decrease in the ozone concentration value after stopping the supply of ozone from the ozone supply unit 10 is large and exceeds a predetermined rate, the control unit 30A determines that the object in the target space S is ozone and has a predetermined concentration or less. It can be judged that the processing is not completed until it becomes . If the rate of decrease in the ozone concentration value is small and is equal to or less than a predetermined rate, it can be determined that the treatment of the object in the target space S has been completed with ozone until the concentration becomes equal to or less than the predetermined rate.

In this embodiment, the predetermined speed is appropriately selected according to the type of object, the initial density of the object, temperature, humidity, and the like.

The off-time T _off (time t ₀ , t ₁ ) is not uniquely determined by the ozone concentration alone, but is determined by the temperature, humidity, etc. of the air in the processing space S measured by the temperature sensor 40 and the humidity sensor 50. It is preferable to take the above into consideration and make appropriate corrections and adjustments. Since the half-life due to natural decomposition of ozone tends to depend on temperature and humidity, the off-time T _off (time t ₀ , t ₁ ) can be set more appropriately by also considering the temperature and humidity in the target space S. can be calculated.

When calculating the rate of decrease of the ozone concentration, for example, the control unit 30A calculates the stop threshold value C12 and the start A difference between the ozone concentration value and the threshold value C11 can be used.
(Stop threshold value C12−Start threshold value C11)/(Time of stop threshold value C12−Time of start threshold value C11) (1)

Further, the control unit 30A can use the ratio of the difference in ozone concentration value to the time difference between any two points within the _OFF time Toff.

The controller 30A may store the relationship between time and ozone concentration in advance in the storage means. In this case, the control unit 30A compares the stored value stored in the storage unit with the actual measurement value measured by the ozone concentration sensor 20 and the operation time of the ozone supply unit 10, and determines whether the ozone supply unit 10 exists in the target space S. It can be determined whether the oxidation of the object is complete.

Further, when the rate of decrease of the ozone concentration value after stopping the driving of the ozone supply section 10 is high, the control section 30A determines that the processing of the object in the target space S has not progressed to the predetermined level, and determines that the rate of decrease is When is small, it may be determined that the processing of the object in the object space S has progressed to the predetermined processing.

Note that the predetermined process is an indicator of the progress of the process of the object in the target space S, such as a safe level, normal level, caution level, or dangerous level.

A temperature sensor 40 measures the temperature in the processing space S. FIG. The temperature sensor 40 is not particularly limited, and a general thermometer or the like can be used.

The humidity sensor 50 measures the humidity within the processing space S. The humidity sensor 50 is not particularly limited, and a general hygrometer or the like can be used.

The CO ₂ sensor 60 measures the CO ₂ concentration within the processing space S. The CO ₂ sensor 60 is not particularly limited, and a general CO ₂ meter or the like can be used.

The notification unit 70 has a function of notifying the calculation result of the control unit 30A. The notification unit 70 can notify completion of the target process by display, output of sound, generation of vibration, or the like. Notification unit 6
As 0, a monitor, alarm, vibration, or the like can be used.

For example, as shown in FIG. 2, it is assumed that the off-time T _off exceeds time t ₁ and is equal to or less than time t ₀ (t ₁ <T _off ≦t ₀ ). In this case, the rate of decrease of the ozone concentration at the OFF time T _off is the rate of decrease of the ozone concentration during the period from time t ₁ to time t ₀ (t ₁ <T _off ≦t ₀ ), and within the target space S can be said to be in a state of being purified to at least a normal level or higher. In this case, the notification unit 70 may display that the level is normal or higher (for example, display level 1), turn on a white lamp, or the like.

Assume that the OFF time T _off is less than or equal to time t ₁ (T _off ≦t ₁ ). In this case, the rate of decrease of the ozone concentration during the _OFF time Toff is the rate of decrease of the ozone concentration at time t1 or _less ( _Toff ≤ t1), and the target space S is in _a state where at least cleaning is required. It can be said that there is. In this case, the notification unit 70 may indicate that cleaning is required (for example, display level 2 or a ventilation mark), turn on a red lamp, or the like.

In addition, when the target space S is ventilated in order to clean the target space S, the ozone in the target space S is also discharged from the target space S, and the off time T _off is substantially equal to the time t ₀ or less. Become. Therefore, the control unit 30A cannot distinguish between a state in which cleaning is required, particularly a state in which ozone consumption is at a dangerous level, and a state in which cleaning is not required. In this case, the control unit 30 determines that the inside of the symmetrical space S is being ventilated when the CO ₂ concentration decreases, and determines that the target space S is not being ventilated when the CO ₂ concentration does not decrease. S may be determined to be in a state (dangerous level) in which the ozone treatment capacity (for example, deodorizing and sterilizing capacity) is insufficient.

Further, when the control unit 30A determines the progress of the processing of the object in the target space S according to the rate of decrease of the ozone concentration value after stopping the driving of the ozone supply unit 10, the notification unit 70 The progress of the processing of the object may be notified by display, output of sound, generation of vibration, or the like.

For example, as shown in FIG. 2, when the inside of the target space S is cleaned, the OFF time T _off is the time t ₀ . In this case, the rate of decrease of the ozone concentration at the OFF time T _off is the rate of decrease of the ozone concentration at the time t _o , which is a state in which ozone is naturally decomposed, cleaning is completed, and the ozone supply unit It can be said that the operation of 10 may be stopped. In this case, the notification unit 70 may display the safety level (for example, display level 0), turn on a white lamp, or the like.

Assume that the OFF time T _off is between time t ₁ and time t ₀ (t ₁ ≦T _off <t ₀ ). In this case, the rate of decrease of the ozone concentration at the OFF time T _off is the rate of decrease of the ozone concentration during the period from time t ₁ to less than time t ₀ (t ₁ ≤ T _off < t ₀ ), and the target space S is It can be said that the operation of the ozone supply unit 10 may be continued with the power supplied to the ozone supply unit 10 minimized. In this case, the notification unit 70 may display that the level is normal (for example, display level 1), turn on a blue lamp, or the like.

Assume that the OFF time T _off is equal to or longer than time t ₂ and shorter than time t ₁ (t ₂ ≦T _off <t ₁ ). In this case, the rate of decrease of the ozone concentration at the OFF time _Toff is the rate of decrease of the ozone concentration at time t2 or _more and _{less than} time t1 _{( t2≤Toff} <t1). This is a caution level state, and it can be said that the operation of the ozone supply unit 10 may be continued by maximizing the power supplied to the ozone supply unit 10 . In this case, the notification unit 70 may display a warning level (for example, level 2 display), turn on a yellow lamp, or the like.

Assume that the off-time T _off exceeds 0 hours and is less than the time t ₂ (0<T _off ≦t ₂ ). In this case, the rate of decrease of the ozone concentration at the _OFF time Toff is the rate of decrease of the ozone concentration at _time t2 or less, and the deodorization and sterilization capacity of the target space S is insufficient, and the dangerous level is reached. It can be said that it is a state. In this case, the notification unit 70 may display a danger level (for example, display of level 3), turn on a red lamp, display a ventilation recommendation mark, or the like.

When the _off time Toff is 0 hours, even if ozone is supplied from the ozone supply unit 10, the ozone concentration in the predetermined space S does not reach a predetermined value (for example, 10 ppm). Therefore, in this case, the control unit 30A may cause the notification unit 70 to display only the ventilation recommendation mark or the like, and notify the user to encourage the combined use of means such as ventilation.

In addition, since the inside of the target space S is at a dangerous level where ozone consumption is extremely high, when the inside of the target space S is ventilated, as described above, the ozone in the target space S is also discharged from the target space S, and the ozone is turned off. The time T _off becomes substantially equal to the time t or less. Therefore, the control unit 30A cannot distinguish whether the inside of the target space S is in a dangerous level state or in a state where cleaning is unnecessary. In this case, the control unit 30 determines that the inside of the symmetrical space S is being ventilated when the CO ₂ concentration decreases, and determines that the target space S is not being ventilated when the CO ₂ concentration does not decrease. You may judge that S is a danger level.

<Ozone treatment method>
Next, an example of an ozone treatment method for removing a target existing in the target space S using the ozone generation control device 1A having the above configuration will be described. FIG. 3 is a flow chart explaining the ozone treatment method. As shown in FIG. 3, the control unit 30A controls the operation of the ozone supply unit 10 to treat the object present in the target space S with ozone (ozone treatment step: step S11).

A method for treating an object with ozone in the ozone treatment step (step S11) will be described. FIG. 4 is a flow chart showing the operation of the ozone treatment step (step S11) in FIG. As shown in FIG. 4, in the ozone treatment step (step S11), the ozone supply unit 10 is operated to generate ozone in the target space S (step S111). When ozone is generated, an object present in the air within the object space S reacts with the ozone and is oxidatively decomposed.

Subsequently, the ozone concentration sensor 20 measures the ozone concentration in the target space S, outputs an ozone concentration value corresponding to the ozone concentration, and sends it to the control section 30A. The controller 30A calculates the ozone concentration in the target space S based on the ozone concentration value output from the ozone concentration sensor 20 (step S112).

The ozone concentration sensor 20 may continuously transmit the ozone concentration value to the control section 30A, or may transmit the ozone concentration value at predetermined time intervals.

Subsequently, the control unit 30A determines whether or not the calculated ozone concentration is equal to or higher than the stop threshold (step S113).

In step S113, when the ozone concentration is less than the threshold value for stopping (step S113: No), ozone is being supplied from the ozone supply unit 10 and is being consumed by reacting with the target object. The ozone concentration inside is within the range of safe standards for humans. The control unit 30A determines that the ozone concentration in the target space S is within the safe standard range for the human body, and measures the ozone concentration in the target space S again with the ozone concentration sensor 20 (step S112).

In step S113, when the ozone concentration is equal to or higher than the threshold value for stopping (step S113: Yes), it can be said that the remaining amount of ozone supplied from the ozone supply unit 10 is excessive. The control unit 30A determines that the ozone concentration in the target space S exceeds the safe standard range for the human body, and stops the operation of the ozone supply unit 10 (step S114).

When the operation of the ozone supply unit 10 is stopped, the supply of ozone from the ozone supply unit 10 to the target space S is stopped, so no ozone is newly supplied to the target space S. Further, if an object exists in the object space S, the ozone reacts with the object and is consumed. Furthermore, the ozone in the target space S decomposes naturally. Therefore, when the operation of the ozone supply unit 10 is stopped, the ozone concentration in the target space S decreases over time.

Subsequently, the control unit 30A measures the ozone concentration in the target space S based on the ozone concentration value output from the ozone concentration sensor 20 (step S115), and determines whether the calculated ozone concentration is equal to or less than the start threshold. Determine (step S116).

In step S116, when the ozone concentration is higher than the start threshold (step S116: No), the control unit 30A determines that ozone exists in the target space S, but the ozone concentration in the target space S is It is determined that the ozone concentration is within the range of the safety standard for the human body, and the ozone concentration sensor 20 measures the ozone concentration in the target space S again (step S115).

In step S116, if the ozone concentration is equal to or less than the start threshold (step S116: Yes), the control unit 30A determines that there is not enough ozone in the target space S to process the target object. , it is judged that there is a high possibility that the target substance exists in a concentration exceeding the concentration at which oxidation can be judged to be completed.

As shown in FIG. 3, after the ozone treatment step (step S11), the control unit 30A calculates the rate of decrease of the ozone concentration in the target space S after the off time T _off (step S12), and the calculated ozone concentration It is determined whether or not the speed of decrease is equal to or less than a predetermined speed (step S13).

The rate of decrease in ozone concentration can be calculated as in the above formula (1).

In this embodiment, the predetermined speed is appropriately selected according to the type of object, the initial density of the object, and the like.

In step S13, if the rate of decrease of the ozone concentration at the time T _off is equal to or less than the predetermined rate (step S13: Yes), the control unit 30A determines that the processing of the object in the handling space S is completed, and performs the processing. exit.

For example, the rate of decrease of the ozone concentration at the off time T _off is a state in which the ozone in the target space S is naturally decomposed like the rate of decrease of the ozone concentration at the time t _o shown in FIG. When the cleaning of the space S is completed, the control section 30A terminates the entire process while the operation of the ozone supply section 10 is stopped.

Also, the control unit 30A may stop the operation of the ozone generation control device 1A.

Further, in step S13, when the rate of decrease of the ozone concentration is equal to or less than the predetermined rate (step S13: Yes), the control section 30A may cause the notification section 70 to notify the user of the calculation result.

Based on the determination result of step S13, the notification unit 70 displays a display corresponding to the cleaned state in the symmetrical space S (e.g., levels 0, 1 and 2, a ventilation mark, etc.), a lamp (e.g., A white lamp, a blue lamp, a yellow lamp, a red lamp, etc.) may be turned on, an alarm, vibration, or the like may be performed.

In step S13, if the rate of decrease of the ozone concentration during the OFF time T _off exceeds a predetermined rate (step S13: No), it is determined that the processing of the object in the treatment space S has not been completed. Then, the control unit 30A drives the ozone supply unit 10 again to generate ozone, and treats the object present in the target space S with ozone (ozone treatment step: step S11).

For example, when the rate of decrease in ozone concentration at the OFF time T _off is the rate of decrease in ozone concentration during the period from time t ₁ to less than time t ₀ (t ₁ ≦T _off <t ₀ ) shown in FIG. Thus, when the inside of the target space S is in a state of being cleaned to a normal level, the control section 30A may operate the ozone supply section 10 while minimizing the electric power supplied thereto.

Moreover, the inside of the target space S is clean, as in the case where the rate of decrease of the ozone concentration at the OFF time T _off is the rate of decrease of the ozone concentration at time t ₁ or less (T _off ≦t ₁ ) shown in FIG. is in a caution level state, the control unit 30A may operate the ozone supply unit 10 while maximizing the power supply.

As described above, according to the ozone treatment method according to the present embodiment, ozone can be generated and stopped in the treatment space S at optimum timing. Therefore, by using the ozone treatment method according to the present embodiment, the object in the target space S can be decomposed while maintaining the ozone concentration in the target space S at a safe concentration (for example, 0.08 ppm to 0.1 ppm). At the same time, generation of excessive ozone in the ozone supply unit 10 can be suppressed.

In the ozone treatment method shown in FIGS. 3 and 4, the ozone concentration in the target space S is gradually lowered by stopping the ozone supply unit 10 to stop generating ozone. Since it is sufficient to reduce the ozone concentration in the space S, control may be performed such that the amount of generated ozone is gradually reduced without stopping the ozone supply unit 10 .

In the ozone processing method shown in FIGS. 3 and 4, the control unit 30A controls the progress of the processing of the object in the object space S according to the rate of decrease of the ozone concentration value after stopping the operation of the ozone supply unit 10. The same can be done when judging. In this case, in step S13 shown in FIG. 3, when the rate of decrease of the ozone concentration during the off time T _off is equal to or less than the predetermined rate (step S13: Yes), the processing of the object in the handling space S is performed at the predetermined rate. Determine that the level has been reached, and terminate the process.

If the rate of decrease in ozone concentration per unit time exceeds a predetermined rate (step S13: No), it is determined that the processing of the object in the treatment space S has not reached a predetermined level, and the ozone supply unit 10 is driven again. and ozone is generated, and the object present in the object space S is treated with the ozone (ozone treatment step: step S11).

Even in this case, the ozone processing method according to the present embodiment can generate and stop ozone in the processing space S at optimum timing, so that the ozone concentration in the target space S can be set to a safe concentration (for example, 0.00). 08 ppm to 0.1 ppm), it is possible to decompose the object in the object space S and suppress generation of excess ozone in the ozone supply unit 10 .

As described above, the ozone generation control device 1A includes the ozone supply section 10, the ozone concentration sensor 20, and the control section 30A. The control unit 30A determines that the processing of the object in the target space S is not completed when the rate of decrease of the ozone concentration value after stopping the driving of the ozone supply unit 10 is high, and determines that the processing of the object in the target space S is not completed when the rate of decrease is low. It is determined that the processing of the objects in S is complete. The rate of decrease of the ozone concentration value is obtained from the amount of decrease of the ozone concentration during the _OFF time Toff of the ozone supply unit 10, and fluctuates according to the processing status of the object within the processing space S. FIG. The more objects exist in the target space S and the more the symmetrical space S is polluted by the objects, the faster the ozone is consumed, and the faster the ozone concentration value decreases. On the other hand, the smaller the amount of objects present in the target space S and the cleaner the inside of the space S to be dealt with, the smaller the amount of ozone consumed, and the slower the rate of decrease in the ozone concentration value. The ozone generation control device 1A controls the operation of the ozone supply unit 10 based on the rate of decrease of the ozone concentration value calculated by the control unit 30A, so that the object in the treatment space S is kept in a state where almost no ozone is consumed. , and can be reduced to an allowable concentration or less, it is possible to determine with high accuracy that the processing of the object in the space S has been completed.

Further, the ozone generation control device 1A judges the completion of the processing of the object existing in the target space S based on the degree of decrease in the rate of decrease of the ozone concentration. Generating excessive ozone in the ozone supply unit 10 can be suppressed while the ozone supply unit 10 is being used. Furthermore, the ozone generation control device 1A can generate ozone again based on how much the rate of decrease of the ozone concentration has decreased, so that the ozone supply section 10 can start generating ozone at the optimum timing. Therefore, the ozone generation control device 1A can reduce consumption of energy required for generating ozone.

In the ozone generation control device 1A, the control unit 30A starts driving the ozone supply unit 10 when the ozone concentration value becomes equal to or less than the start threshold value, and starts driving the ozone supply unit 10 when the ozone concentration value becomes equal to or more than the stop threshold value. can be stopped. When the ozone concentration value is equal to or less than the stop threshold value and equal to or more than the start threshold value, the ozone generation control device 1A indicates that ozone exists in the target space S, and the ozone concentration in the target space S does not affect the human body. It can be easily judged that it is within the range of safe standards. Therefore, the ozone generation control device 1A can operate the ozone supply unit 10 more appropriately based on the threshold for stopping and the threshold for starting, so that the object can be processed more accurately and easily. .

In the ozone generation control device 1A, when the rate of decrease of the ozone concentration value after stopping the driving of the ozone supply unit 10 is high in the control unit 30A, the processing of the object in the target space S has not progressed to the predetermined processing. , and when the rate of decrease is small, it may be determined that the processing of the object in the object space S has progressed to the predetermined processing. In this case, the ozone generation control device 1A can grasp the progress of the processing of the object in the target space S based on the decrease in the rate of decrease of the ozone concentration value. Therefore, the ozone generation control device 1A operates the ozone supply unit 10 longer based on the rate of decrease of the ozone concentration value calculated by the control unit 30A, thereby increasing the amount of ozone generated. The object in the space S can be reliably decomposed to a state where ozone is hardly consumed or in the vicinity thereof, and the concentration can be reduced to an allowable level or less. Therefore, even in this case, the ozone generation control device 1A can determine with high accuracy that the processing of the object in the treatment space S has been completed.

[Second embodiment]
An ozone generation control device according to a second embodiment of the present invention will be described. FIG. 5 is a schematic configuration diagram showing an ozone generation control device according to this embodiment. As shown in FIG. 5, the ozone generation control device 1B according to the present embodiment is obtained by changing the control section 30A of the ozone generation control device 1A according to the first embodiment to a control section 30B. Since this embodiment is the same as the ozone generation control device 1A according to the first embodiment except for the configuration of the control section 30B, only the configuration of the control section 30B will be described.

When removing an object present in the target space S, the ozone generation control device 1B performs feedback control on the operation of the ozone supply unit 10 so as to maintain the ozone concentration in the target space S within a predetermined range. The operation of the supply unit 10 is stopped. The ozone generation control device 1B estimates the amount of ozone consumption based on the _off -time Toff of the operation of the ozone supply unit 10 at that time, and removes the target object in the target space S until the target concentration becomes equal to or less than a predetermined target concentration. Therefore, it can be accurately determined that the removal of the object in the object space S is completed.

In the control section 30A, the control section 30B determines the rate of decrease of the ozone concentration value based on the length of the _OFF time Toff from when the ozone supply section 10 is stopped to when it is restarted.

As shown in FIG. 2, the OFF time T _off is shorter at time t ₁ than at time t ₀ , and the rate of decrease in the ozone concentration value is greater. When the processing space S is contaminated with an object or the like, the _ozone concentration value decreases faster than when the processing space S is clean. becomes shorter. Therefore, the rate of decrease of the ozone concentration value corresponds to the length of the _off -time _Toff . The time T _off becomes longer.

The control unit 30B determines that the processing of the object is not completed when the off time T _off of the ozone supply unit 10 is short, and determines that the processing of the object is completed when the off time T _off is long. That is, the control unit 30B determines that the processing of the object in the target space S is not completed when the off-time T _off is less than the predetermined time, and determines that the off-time T _off is longer than or equal to the predetermined time. , that the processing of the object in the object space S is completed.

It should be noted that the predetermined time is not particularly limited, and is appropriately set according to the type of object and the like. The predetermined time is, for example, a time during which sufficient ozone exists to treat the object in the symmetrical space S, and the object can exist at a concentration below which it can be determined that oxidation has been completed.

An example of an ozone treatment method for removing an object present in the object space S using the ozone generation control device 1B having the above configuration will be described.

FIG. 6 is a flow chart explaining the ozone treatment method. As shown in FIG. 6, the control unit 30B controls the operation of the ozone supply unit 10 to treat the object present in the target space S with ozone (ozone treatment step: step S21). Since the ozone treatment step (step S21) is the same as the ozone treatment step (step S11) of the ozone treatment method shown in FIG. 3, details thereof are omitted.

After the ozone treatment step (step S21), the control unit 30B calculates the _off -time Toff (step S22), and determines whether the _off -time Toff is equal to or longer than a predetermined time (step S23).

In step S23, if the _OFF time Toff is equal to or longer than the predetermined time (step S23: Yes), the control unit 30B determines that the processing of the object in the coping space S is completed, and terminates the processing.

In step S23, when the off time T _off is less than the predetermined time (step S23: No), the control unit 30B determines that the processing of the object in the coping space S has not been completed. Then, the control unit 30B drives the ozone supply unit 10 again to generate ozone, and treats the object existing in the target space S with ozone (ozone treatment step: step S21).

According to the ozone processing method according to the present embodiment, as in the ozone processing method according to the first embodiment, ozone can be generated and stopped in the processing space S at optimum timing. Therefore, by using the ozone treatment method according to the present embodiment, the object in the target space S can be decomposed while maintaining the ozone concentration in the target space S at a safe concentration (for example, 0.08 ppm to 0.1 ppm). At the same time, generation of excessive ozone in the ozone supply unit 10 can be suppressed.

The control unit 30B of the ozone generation control device 1B determines that the processing of the object is not completed when the off time T _off of the ozone supply unit 10 is short, and the processing of the object is completed when the off time T _off is long. judge that it did. As a result, the ozone generation control device 1B controls the operation of the ozone supply unit 10 based on the length of the _off time Toff of the ozone supply unit 10, so that the object in the treatment space S is almost completely free from ozone consumption. It is possible to reliably decompose to a state where there is no contamination, reduce the concentration to an allowable level or less, and easily determine whether or not the processing of the object has been completed. Therefore, the ozone generation control device 1B can easily and accurately determine that the processing of the object in the treatment space S has been completed.

Further, the ozone generation control device 1B judges the completion of the processing of the object existing in the target space S based on the extension of the length of the _off time Toff. can be easily suppressed from generating excess ozone in the ozone supply unit 10 while decomposing the Furthermore, the ozone generation control device 1B can generate ozone again based on the extension of the length of the _off -time Toff, so that the ozone supply section 10 can start generating ozone at the optimum timing. can. Therefore, the ozone generation control device 1B can reduce consumption of energy required for generating ozone.

[Third embodiment]
An ozone generation control device according to a third embodiment of the present invention will be described. FIG. 7 is a schematic configuration diagram showing an ozone generation control device according to this embodiment. As shown in FIG. 7, the ozone generation control device 1C according to the present embodiment is obtained by changing the control section 30B of the ozone generation control device 1B according to the second embodiment to a control section 30C. Since this embodiment is the same as the ozone generation control device 1B according to the second embodiment except for the configuration of the control section 30C, only the configuration of the control section 30C will be described.

The control unit 30C sets the rate of decrease of the ozone concentration value to the length of the OFF time T _off of the ozone supply unit 10 in the control unit 30B. The cumulative time including the length of the time T _on is used for judgment.

As shown in FIG. 2, the on-time T _on at time t ₁₁ and at time t ₁₀ have approximately the same length, and the rate of increase of the ozone concentration value is also approximately the same. Also, the on-time T _on (time t ₁₁ and time t ₁₀ ) is shorter than the off-time T _off (time t ₁ , time t ₀ ). Therefore, when judging the difference in the _off -time Toff, the difference in the _off -time Toff can be judged to be substantially the same by judging by the cycle consisting of the cumulative time of the _off -time Toff and the _on -time Ton.

The control unit _{30C determines} that the processing of the object in the target space S is not completed when the period is short, and determines that the processing of the object in the target space S is not completed when the period is short, and the period is long. It is determined that the processing of the object in the space S is completed. That is, when the cycle consisting of the ON time T _on and the OFF time T _off is less than the predetermined time, the control unit 30C determines that the processing of the object in the target space S is not completed, and the cycle is When it is longer than the predetermined time, it is determined that the processing of the object in the object space S is completed.

It should be noted that the predetermined time is not particularly limited, and is appropriately set according to the type of object and the like. The predetermined time is, for example, a time obtained by combining the ON time T _on with the time during which sufficient ozone exists to process the object in the symmetrical space S and the object can exist at a concentration below which it can be determined that oxidation has been completed. be.

An example of an ozone treatment method for removing an object present in the object space S using the ozone generation control device 1C having the above configuration will be described.

FIG. 8 is a flow chart explaining the ozone treatment method. As shown in FIG. 8, the control unit 30C controls the operation of the ozone supply unit 10 to treat the object present in the target space S with ozone (ozone treatment step: step S31). Since the ozone treatment step (step S31) is the same as the ozone treatment step (step S11) of the ozone treatment method shown in FIG. 3, details thereof are omitted.

After the ozone treatment step (step S31), the control unit 30C calculates the _off -time Toff and the on-time Ton (step S32), and calculates the cycle consisting of the _off -time Toff and the _on -time Ton (step S33). .

Subsequently, the control unit 30C determines whether or not the calculated cycle is equal to or longer than a predetermined time (step S34).

In step S34, if the cycle of the off-time T _off and the on-time T _on is equal to or longer than the predetermined time (step S34: Yes), the control unit 30C determines that the processing of the object in the handling space S is completed, End the process.

In step S34, when the period is less than the predetermined time (step S34: No), the control unit 30C determines that the processing of the object in the coping space S has not been completed. Then, the control unit 30C drives the ozone supply unit 10 again to generate ozone, and treats the object present in the target space S with ozone (ozone treatment step: step S31).

According to the ozone processing method according to the present embodiment, as in the ozone processing method according to the first embodiment, ozone can be generated and stopped in the processing space S at optimum timing. Therefore, by using the ozone treatment method according to the present embodiment, the object in the target space S can be decomposed while maintaining the ozone concentration in the target space S at a safe concentration (for example, 0.08 ppm to 0.1 ppm). At the same time, generation of excessive ozone in the ozone supply unit 10 can be suppressed.

The control unit 30C of the ozone generation control device 1C determines that the processing of the object in the target space S is not completed when the period consisting of the ON time T _on and the OFF time T _off is short, and when the period is long It is determined that the processing of the object in the space S is completed. The ozone generation control device 1C controls the operation of the ozone supply unit 10 based on the length of the cycle consisting of the OFF time T _off and the ON time T _on of the ozone supply unit 10, so that the object in the space S is can be reduced to an allowable concentration or less, and it is possible to easily determine whether or not the processing of the object has been completed. Since the on-time T _on hardly changes regardless of the amount of objects present in the coping space S, even if it is determined based on the period, it is possible to obtain substantially the same result as if it is determined based on the off-time T _off . can. Therefore, similarly to the ozone generation control device 1B, the ozone generation control device 1C can easily and accurately determine that the processing of the object in the treatment space S is completed.

Further, the ozone generation control device 1C judges the completion of the processing of the object existing in the target space S based on the extension of the length of the ON time T _on and the OFF time T _off . It is possible to easily suppress generation of excess ozone in the ozone supply unit 10 while decomposing the object in S. Furthermore, the ozone generation control device 1C can generate ozone again based on the extension of the length of the _off time Toff, so that the ozone supply unit 10 can start generating ozone at the optimum timing. can. Therefore, the ozone generation control device 1B can reduce consumption of energy required for generating ozone, like the ozone generation control device 1A.

[Fourth embodiment]
An ozone generation control device according to a fourth embodiment of the present invention will be described. FIG. 9 is a schematic configuration diagram showing an ozone generation control device according to this embodiment. As shown in FIG. 9, an ozone generation control device 1D according to this embodiment is obtained by changing the control section 30C of the ozone generation control device 1C according to the third embodiment to a control section 30D. Since this embodiment is the same as the ozone generation control device 1C according to the third embodiment except for the configuration of the control section 30D, only the configuration of the control section 30D will be described.

The control unit 30D controls the rate of decrease of the ozone concentration value in the control unit 30C to the length of the off time T _off of the ozone supply unit 10. It is determined by the ratio of the length of the ON time T _on (OFF time T _off /ON time T _on (hereinafter referred to as “relative ratio of OFF time (T _off /T _on )”)).

As shown in FIG. 2, the on-time T _on at time t ₁₁ and at time t ₁₀ have approximately the same length, and the rate of increase of the ozone concentration value is also approximately the same. Also, the on-time T _on (time t ₁₁ , time t ₁₀ ) is shorter than the off-time T _off (time t ₁ , time t ₀ ). Therefore, when judging the difference in the off-time T _off , the difference in the off-time T _off can be judged in substantially the same way even if it is judged by the relative ratio (T _off /T _on ) of the off time.

When the off-time relative ratio (T _off /T _on ) is small, the control unit 30D determines that the processing of the object in the object space S is not completed, and determines that the off-time relative ratio (T _off /T _on ) is large, it is determined that the processing of the object in the object space S has been completed. That is, when the off-time relative ratio (T _off /T _on ) is less than a predetermined value, the control unit 30D determines that the processing of the object in the target space S has not been completed. When the relative ratio (T _off /T _on ) is equal to or greater than a predetermined value, it is determined that the processing of the object within the object space S has been completed.

It should be noted that the predetermined value is not particularly limited, and is appropriately set according to the type of object and the like. The predetermined value is, for example, the relative ratio of _off time (Toff /T _on ).

An example of an ozone treatment method for removing an object existing in the object space S using the ozone generation control device 1D having the above configuration will be described.

FIG. 10 is a flow chart explaining the ozone treatment method. As shown in FIG. 10, the control unit 30D controls the operation of the ozone supply unit 10 to treat the object present in the target space S with ozone (ozone treatment step: step S41). Since the ozone treatment step (step S41) is the same as the ozone treatment step (step S11) of the ozone treatment method shown in FIG. 3, details thereof are omitted.

After the ozone treatment step (step S41), the control unit 30D calculates the _off -time Toff and the _on -time Ton (step S42), and calculates the _off -time relative ratio (Toff/ _Ton ) (step S43). ).

Subsequently, the control unit 30D determines whether or not the calculated relative ratio of off times (T _off /T _on ) is equal to or greater than a predetermined value (step S44).

In step S44, if the off-time relative ratio (T _off /T _on ) is equal to or greater than the predetermined value (step S44: Yes), it is determined that the processing of the object in the coping space S has been completed, and the processing is continued. finish.

In step S44, if the off-time relative ratio (T _off /T _on ) is less than the predetermined value (step S44: No), it is determined that the processing of the object in the coping space S has not been completed. Then, the control unit 30D drives the ozone supply unit 10 again to generate ozone, and treats the object present in the target space S with ozone (ozone treatment step: step S41).

According to the ozone processing method according to the present embodiment, as in the ozone processing method according to the first embodiment, ozone can be generated and stopped in the processing space S at optimum timing. Therefore, by using the ozone treatment method according to the present embodiment, the object in the target space S can be decomposed while maintaining the ozone concentration in the target space S at a safe concentration (for example, 0.08 ppm to 0.1 ppm). At the same time, generation of excessive ozone in the ozone supply unit 10 can be suppressed.

The control unit 30D of the ozone generation control device 1D determines that the processing of the object in the target space S is not completed when the off-time relative ratio (T _off /T _on ) is small, When the ratio (T _off /T _on ) is large, it is determined that the processing of the objects in the object space S has been completed. The ozone generation control device 1D controls the operation of the ozone supply unit 10 based on the magnitude of the relative off-time ratio (T _off /T _on ) of the ozone supply unit 10, so that the object in the treatment space S is reduced to an allowable concentration or less, and it is possible to easily determine whether or not the processing of the object has been completed. Since the on-time T _on hardly changes regardless of the amount of objects present in the coping space S, even if the judgment is made based on (off-time T _off /on-time T _on ), the judgment based on the off-time can obtain almost the same result. Therefore, similarly to the ozone generation control device 1C, the ozone generation control device 1D can easily and highly accurately determine that the processing of the object in the treatment space S is completed.

[Fifth embodiment]
An ozone generation control device according to a fifth embodiment of the present invention will be described. FIG. 11 is a schematic configuration diagram showing an ozone generation control device according to this embodiment. As shown in FIG. 11, an ozone generation control device 1E according to this embodiment is obtained by changing the control section 30A of the ozone generation control device 1A according to the first embodiment to a control section 30E. Since this embodiment is the same as the ozone generation control device 1A according to the first embodiment except for the configuration of the control section 30E, only the configuration of the control section 30E will be described.

After the control unit 30A determines that the processing of the object has been completed, the control unit 30E drives the ozone supply unit 10 for a predetermined period of time to identify a specific object existing in the object space S (first object ) other than the first object (second object) of a type different from the first object.

In the object space S, there are often a plurality of objects to be decomposed. The rate at which the target is decomposed and removed by ozone varies depending on the type, concentration, and the like of the target. Therefore, even if a particular object is removed, other remaining objects may remain.

After determining that the processing of the object has been completed, the control unit 30E drives the ozone supply unit 10 for a predetermined period of time to process objects other than the object existing in the object space S, and Objects are removed to a concentration below a predetermined reference value.

The predetermined time is not particularly limited, and may be any time that allows the processing of another object to be completed according to the type, density, etc. of the other object. For example, ozone reacts with other objects in addition to the remaining objects and is consumed, while ozone is newly supplied from the ozone supply unit 10 into the target space S, so that the ozone concentration per unit time fluctuates. However, when the concentration of other objects decreases to the extent that they do not react with ozone, or when almost all of them are decomposed, the ozone concentration rises sharply. Therefore, the predetermined time may be up to the time when the rate of increase in the ozone concentration increases due to the reaction with other objects.

An example of an ozone treatment method for removing a target existing in the target space S using the ozone generation control device 1E having the above configuration will be described.

FIG. 12 is a flow chart explaining the ozone treatment method. As shown in FIG. 12 , the control unit 30E controls the operation of the ozone supply unit 10 to treat the object present in the target space S with ozone (ozone treatment step: step S51), and then the off time T is reached. The rate of decrease of the ozone concentration in the target space S after _{turning off} is calculated (step S52), and it is determined whether or not the calculated rate of decrease of the ozone concentration is equal to or less than a predetermined rate (step S53). Steps S51) to S53 of the ozone treatment method according to the present embodiment are the same as steps S11 to S13 of the ozone treatment method of the ozone generation control device 1A according to the first embodiment shown in FIG. Therefore, details are omitted.

In step S53, if the rate of decrease of the ozone concentration at the time T _off is equal to or less than the predetermined rate (step S53: Yes), the control unit 30E drives the ozone supply unit 10 to cause the predetermined The other objects other than the object are processed, and the other objects are removed to a density equal to or lower than a predetermined reference value (step S54).

In step S54, the control unit 30E may repeat the same process as the ozone treatment process (step S51) once or more, or may continue for a predetermined period of time.

In addition, in step S54, the control unit 30E performs a process similar to the ozone treatment process (step S51), an integrated value (CT value ) may be repeated until it reaches a predetermined value. The predetermined value in this case is a CT value required for sterilization or inactivation of another target, and is appropriately set according to the type of other target (for example, the type of bacteria, virus, etc.).

When the control unit 30E determines that other objects in the space S have been removed to a density equal to or lower than the predetermined reference value, the control unit 30E ends the process.

According to the ozone processing method according to this embodiment, even when the ozone concentration is equal to or higher than the stop threshold, the ozone supply unit 10 is driven to supply ozone into the target space S in step S24. As a result, specific objects in the object space S are reduced in density or completely decomposed and removed. Objects other than the objects existing in the object space S are decomposed and removed by the ozone supplied from the ozone supply unit 10 to a state where ozone consumption is almost zero, and the concentration thereof is allowed. It can be reduced to a predetermined value or less.

Moreover, according to the ozone processing method according to the present embodiment, ozone can be generated in the processing space S at the optimum timing, as in the ozone processing method according to the first embodiment. Therefore, by using the ozone treatment method according to the present embodiment, while maintaining the ozone concentration in the target space S at a safe concentration (for example, 0.08 ppm to 0.1 ppm), a specific object in the target space S and , while decomposing other objects, the generation of excess ozone in the ozone supply unit 10 can be suppressed.

The ozone generation control device 1E drives the ozone supply unit 10 after the control unit 30E determines that the processing of the object has been completed. As a result, the ozone generation control device 1E generates ozone from the ozone supply unit 10, thereby more reliably removing specific objects in the target space S, and removing specific objects existing in the target space S. In addition to objects, other different types of objects can be decomposed with little ozone consumption to reduce the concentration of the object below a predetermined acceptable value. Therefore, even if a plurality of objects of different types exist in the treatment space S, the ozone generation control device 1E can reduce the concentrations of the plurality of objects in the treatment space S to a predetermined value or less, and It can be determined with high accuracy that the processing of a plurality of objects in the space S has been completed.

As a result, the ozone generation control device 1E can target, for example, odorous gases as specific targets and viruses as other targets, even if it is necessary to treat them collectively. Completion of processing of different types of objects can be determined simultaneously.

As described above, the ozone generation control devices 1A to 1E according to the above-described embodiments have the above-described characteristics, so that the objects in the target space S can be easily controlled without generating ozone more than necessary at the optimum time. It can be determined with high accuracy that the removal has been completed with such a configuration. Therefore, the ozone generation control devices 1A to 1E are installed inside buildings such as houses, buildings, hotels, hospitals, welfare facilities, etc., inside cars, trains, etc., inside airplanes, etc., and exist in these spaces. It can be suitably used as a device for removing objects and cleaning the air. In particular, the ozone generation control devices 1A to 1E can reduce the time required for treating the object with ozone and the amount of wasteful generation of ozone. Therefore, while reducing the energy consumption of buildings, vehicles, etc., it is possible to reliably remove objects in these rooms and vehicle interiors. Therefore, the ozone generation control devices 1A to 1E can be suitably used for deodorization, removal of organic substances, removal of harmful substances, sterilization, and the like, in rooms in buildings, vehicle interiors, and the like.

As described above, the embodiment has been described, but the above embodiment is presented as an example, and the present invention is not limited by the above embodiment. The above embodiments can be implemented in various other forms, and various combinations, omissions, replacements, changes, etc. can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

1A, 1B, 1C, 1D, 1E ozone generation control device 10 ozone supply unit 20 ozone detection unit (ozone concentration sensor)
30A, 30B, 30C, 30D, 30E control unit S target space

Claims (7)

an ozone supply unit that supplies ozone into the target space;
an ozone detector that detects ozone in the target space and outputs an ozone concentration value;
a control unit that drives and controls the ozone supply unit based on the ozone concentration value;
An ozone generation control device comprising
The control unit determines that the processing of the object in the target space is not completed when the rate of decrease of the ozone concentration value after stopping the driving of the ozone supply unit is high, and determines that the processing of the object in the target space is not completed when the rate of decrease is low. An ozone generation control device that determines that processing of the object in the object space is completed. The control unit starts driving the ozone supply unit when the ozone concentration value becomes equal to or less than the start threshold value, and the ozone supply unit when the ozone concentration value becomes equal to or more than the stop threshold value which is larger than the start threshold value. 2. The ozone generation control device according to claim 1, wherein the driving of the supply unit is stopped. The control unit determines that the processing of the object is not completed when the off time from when the ozone supply unit is stopped until it is restarted is short, and when the off time is long, the processing of the object is performed. 3. The ozone generation control device according to claim 2, wherein the ozone generation control device determines that the step has been completed. The control unit determines that the processing of the object in the object space has not been completed when the cycle of the ON time and the OFF time from when the ozone supply unit is restarted to when it is stopped is short. 4. The ozone generation control device according to claim 3, wherein it is determined that the processing of the object in the object space is completed when the cycle is long. The control unit determines that processing of the object in the object space is not completed when the ratio of the off time to the on time is small, and determines that the object is not completely processed when the ratio of the off time to the on time is large. 5. The ozone generation control device according to claim 4, wherein it is determined that the processing of the object in the space is completed. The ozone generator according to any one of claims 1 to 5, wherein after determining that the processing of the object is completed, the control unit drives the ozone supply unit to process another object. Control device. an ozone supply unit that supplies ozone into the target space;
an ozone detector that detects ozone in the target space and outputs an ozone concentration value;
a control unit that drives and controls the ozone supply unit based on the ozone concentration value;
An ozone generation control device comprising
The controller determines that the processing of the object in the target space has not progressed to a predetermined level when the rate of decrease of the ozone concentration value after stopping the driving of the ozone supply unit is large, and determines that the rate of decrease is an ozone generation control device that determines that the processing of the object in the object space has progressed to a predetermined level when the is small.

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