WO2013084485A1 - Disinfection device - Google Patents

Abstract

Provided is a disinfection device capable of reducing the residual ozone concentration in a short time without the structure of the device being made complex. The device is provided with: a disinfection chamber in which a door that opens and closes, an ozone-generating source, an ultraviolet ray source that emits ultraviolet rays of a wavelength region with ozone-decomposing effects, and a sensor that detects ozone concentration are disposed; and a controller that controls the driving of the ozone-generating source and the ultraviolet ray source and controls the opening and closing of the door. The controller: performs the disinfection of the object being disinfected that is held in the disinfection chamber by locking the door, driving the ozone-generating source and generating ozone; performs the ozone-decomposition process by driving the ultraviolet ray source after completion of the disinfection process; and releases the locking of the door when the sensor detects that the ozone concentration inside the disinfection chamber has fallen to a prescribed value.

Description

Sterilizer

The present invention relates to a sterilizing apparatus for disinfecting and sterilizing food such as meat, chicken, shellfish and fresh produce, and various appliances such as toothbrush, contact lens, comb, brush and scissors using gaseous ozone.

Ozone has strong oxidizing power, and it is known that this oxidizing power exerts effects such as sterilization, disinfection, deodorization and bleaching.
And, ozone is expected to be used for various purposes such as sterilization and deodorization in swimming pools, water supply, aquaculture, toilets and hospitals, environmental sterilization in food processing facilities, cleaning of IC substrates and the like.
On the other hand, since ozone is harmful to human body when it becomes high concentration, the ozone tolerance value in the atmosphere is determined by various standards.
Therefore, when using high concentration ozone for sterilization, deodorization and cleaning, it is necessary to install an ozonizer that decomposes the generated ozone.
Patent Document 1 below proposes a sterilization apparatus using ozone in which ozone is hardly released to the outside.

The sterilization apparatus comprises a sterilization chamber provided with an ozone generation source, an ozone treatment chamber for decomposing ozone, a circulation means for circulating air between the sterilization chamber and the ozone treatment chamber, and a circulation means after the sterilization step. And a controller that operates over time.
Then, after the sterilization process is completed, air is circulated between the sterilization room and the ozone treatment room for a predetermined time to decompose toxic ozone into oxygen, thereby preventing the ozone from being released to the outside.

Moreover, the deodorizing sterilizing illuminating device which deodorizes and disinfects is proposed by patent document 2 with the combination of an ultraviolet-ray source and an ozone generation source.
The deodorizing and sterilizing lighting device includes a main body, a lid, a folding portion connecting the two, and an ultraviolet light source and an ozone generator provided on the main body. And a tent-like space is formed by opening the lid to the main body, and the dirty surface of the floor surface is covered and sealed in the tent-like space, and it is used for deodorizing sterilization from the ultraviolet light source in the tent-like space. It is irradiated with ultraviolet light and filled with ozone from the ozone generation part to carry out deodorizing and sterilization.
And the detoxification of ozone after deodorizing sterilization is carried out by introducing ozone detoxifying substances such as oxygen and water vapor into the tent-like space and mixing residual ozone with oxygen and misty water .
Furthermore, Patent Document 3 proposes a method of decomposing ozone using activated carbon.

JP 2005-342314 A JP, 2009-50584, A JP 2012-133208 A

However, in the sterilizer described in Patent Document 1, since ozone is decomposed into oxygen by the ozonolysis catalyst in the ozonation chamber, the ozonation chamber provided with the ozonolysis catalyst is disposed adjacent to the sterilization chamber. It has the disadvantage that the structure of the sterilizer is complicated.
In addition, if residual ozone after completion of the sterilization process passes through the ozonolysis catalyst in a short time, ozone is not sufficiently decomposed, so air is circulated for a long time between the sterilization room and the ozone treatment room. It also has the disadvantage of having to be essential. Furthermore, in the case of catalytic processes, it is necessary to replace the catalyst material periodically.
Moreover, in the deodorizing and sterilizing lighting device described in Patent Document 2, it is necessary to add an ozone detoxifying substance for detoxifying ozone, and there is a drawback that the processing becomes complicated.
Furthermore, the ozonolysis apparatus described in Patent Document 3 has an advantage that the apparatus is simple, but since ozone is decomposed using activated carbon, there is a disadvantage that there is a danger of explosion when the concentration of ozone to be decomposed becomes high. .

The present invention has been made in view of the above problems, and provides a sterilizer using ozone, which can reduce the concentration of residual ozone in a short time without complicating the structure of the device. The purpose is
Furthermore, it aims at providing the sterilizer provided with the ozonolysis device which can decompose | disassemble high concentration ozone by a simple method.

The sterilizing apparatus of the present invention comprises a sterilizing chamber provided with an open / close door, an ozone generation source, an ultraviolet light source emitting ultraviolet light in a wavelength range having an ozonolytic action, and a sensor detecting ozone concentration, an ozone generation source And a controller for controlling the drive of the ultraviolet light source and controlling the opening and closing of the opening and closing door, and the controller locks the opening and closing door to drive the ozone generation source to generate ozone to be stored in the sterilization chamber. Execute sterilization processing and drive the ultraviolet light source after completion of sterilization processing to execute decomposition processing of ozone, and when the sensor detects that the ozone concentration in the sterilization chamber has dropped to a predetermined value, lock the open / close door It is characterized by releasing.

The sterilizing apparatus of the present invention comprises a sterilization chamber provided with an open / close door, an ozone generation source, and an ultraviolet light source emitting ultraviolet light in a wavelength range having an ozonolytic action, drive control and opening / closing of the ozone generation source and the ultraviolet light source The controller includes a controller for controlling the opening and closing of the door, and the controller locks the opening and closing door to drive the ozone generation source to generate ozone to execute the sterilization process of the object contained in the sterilization chamber, and the sterilization process After completion of the process, the ultraviolet light source is driven to execute decomposition processing of ozone, and the lock of the open / close door is released after a predetermined time has elapsed.
Further, the sterilization chamber is characterized in that a light shielding plate is provided at a position where the object to be sterilized is shielded from the irradiation of the ultraviolet light.
Further, the wavelength range is characterized in that the peak wavelength is a wavelength range of 200 to 280 nm of 254 nm.
Further, the ozone generation source is characterized in that ozone is generated by discharge in air or ultraviolet irradiation of air.

The sterilizing apparatus according to the present invention comprises an open / close door, a first ultraviolet light source emitting ultraviolet light in a first wavelength range having an ozone generating function, and a second ultraviolet light emitting in a second wavelength range having an ozone decomposition function. And a controller for controlling the drive of the first UV light source and the second UV light source and controlling the opening and closing of the open / close door, the controller comprising: Locking the open / close door and driving the first ultraviolet light source to generate ozone to execute sterilization processing of the object to be sterilized contained in the sterilization chamber, and driving the second ultraviolet light source after termination of the sterilization processing The decomposition process of ozone is executed, and when the sensor detects that the ozone concentration in the sterilization chamber has dropped to a predetermined value, the lock of the open / close door is released.

The sterilizing apparatus according to the present invention comprises an open / close door, a first ultraviolet light source emitting ultraviolet light in a first wavelength range having an ozone generating function, and a second ultraviolet light emitting in a second wavelength range having an ozone decomposition function. And a controller for controlling the drive of the first UV light source and the second UV light source and controlling the opening and closing of the open / close door, the controller locks the open / close door and (1) drive the ultraviolet light source 1 to generate ozone and execute sterilization processing of the object contained in the sterilization chamber, and after the sterilization processing, drive the second ultraviolet light source to execute decomposition processing of ozone; It is characterized in that the lock of the open / close door is released after a predetermined time has elapsed.
Moreover, the sterilization chamber is characterized in that a light shielding plate is provided at a position where the object to be sterilized is shielded from the irradiation of the ultraviolet light in the second wavelength range.

The first wavelength range is a 10 to 200 nm wavelength range with a peak wavelength of 185 nm, and the second wavelength range is a 200 to 280 nm wavelength range with a peak wavelength of 254 nm.
Moreover, the sterilizer of this invention installed the stirring fan in the sterilization chamber, It is characterized by the above-mentioned.

The sterilization apparatus of the present invention comprises a sterilization room provided with an open / close door and a sensor for detecting an ozone concentration, an ozone generator for generating ozone and flowing the generated ozone into the sterilization room, and ozone flowing into the sterilization room And a controller for controlling the operation of the ozonizer and the ozonizer and controlling the opening and closing of the open / close door, wherein the decomposer has an enclosed container having an inlet and an outlet, the inside of the enclosed container And an ultraviolet light source for directly irradiating ultraviolet light in a wavelength range having ozonolysis to the fluid flowing in from the inlet, and the controller locks the open / close door to drive the ozone generator to Supply ozone to the container, execute sterilization processing of the object contained in the sterilization chamber, drive the ozonizer during and after the continuation of the sterilization processing and execute the decomposition processing of ozone, and the sensor When the ozone concentration in the sterilization chamber is detected that dropped to a predetermined value, characterized in that to unlock the door.

The sterilization apparatus of the present invention comprises a sterilization room provided with an open / close door, an ozone generator for generating ozone and flowing the generated ozone into the sterilization room, and an ozonizer for decomposing ozone flowing into the sterilization room An ozone generator and a controller for controlling the operation of the ozonizer and controlling the opening / closing of the open / close door, wherein the decomposer is disposed in an enclosed container having an inlet and an outlet, and is disposed in the enclosed container and flows from the inlet The controller comprises an ultraviolet light source for directly irradiating ultraviolet light in a wavelength range having an ozonolytic action to the fluid, and the controller locks the open / close door to drive the ozone generator to flow ozone into the sterilization chamber Perform sterilization processing of the material contained in the container, drive the ozonizer during and after the sterilization processing to execute ozone decomposition processing, and unlock the open / close door after a predetermined time has elapsed And wherein the Rukoto.

Further, the wavelength range is characterized in that the peak wavelength is a wavelength range of 200 to 280 nm of 254 nm.

Further, the enclosed container is characterized in that at least the inner wall surface of the enclosed container is uneven, and the enclosed container is a metal that functions as a catalyst at the time of ozone decomposition.

Further, the enclosed container is characterized in that a metal functioning as a catalyst at the time of ozone decomposition is applied to the inner wall surface.

Also, the metal is characterized in that it is aluminum, copper, nickel, palladium, silver, tin, lead, titanium, iron, or a mixture thereof.

Further, the enclosed container is characterized by including a flow member for moving the fluid flowing in from the inlet toward the outlet.

In addition, the sealed container is characterized in that a turbulent flow plate is attached to prevent the flow of the fluid.

Further, the turbulent flow plate is characterized in that the turbulent flow plate is attached such that the attachment angle with the inner wall surface of the enclosed container is 90 ° or more with respect to the traveling direction of the fluid.

Further, the ozonolysis unit is characterized in that a plurality of ozonolysis units are connected in series.

The ozonolysis unit is characterized in that the inlets of the plurality of ozonolysis units are connected in parallel.

In addition, an ozone generator and an ozonolysis device are provided in the sterilization chamber.

Moreover, the ozone generator and the ozonolysis device are installed outside the sterilization chamber.

In the present invention, an ultraviolet light source for emitting ultraviolet light in a wavelength range having an ozonolytic action is provided in the sterilization chamber, and after completion of the sterilization treatment, the ultraviolet light source is driven to perform ozone decomposition treatment. It is possible to realize a bactericidal effect that can reduce the concentration of residual ozone in a short time without complicating the structure.
Further, in the present invention, ozone can be decomposed at high concentration without using a member that needs replacement, and by connecting a plurality of ozone, it is possible to easily improve ozone decomposition ability and ozone decomposition rate. Since the decomposer is used, a sterilizer adapted to the system to be applied can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS The outline figure which shows the internal structure of the sterilizer which concerns on one Example of this invention. The front view of the sterilizer which concerns on one Example of this invention. The wavelength spectrum figure of the UV light source used for this invention. The figure which shows the elapsed time by this invention, and the change of an ozone concentration. Process drawing which shows operation | movement of the sterilizer of this invention. The outline figure which shows the internal structure of the ozonolysis device used for the sterilizer of this invention. The overview figure which shows the internal structure of the ozonolysis device which attached the turbulent flow board. The top view which shows the shape of various turbulent flow boards. The outline figure which shows the internal structure of the ozonolysis device which attached multiple turbulence plates. Connection diagram of the ozonizer in verification experiment. The figure which shows the change of the ozone concentration with respect to the elapsed time by verification experiment. FIG. 1 is a schematic view showing the internal structure of a plurality of serially connected ozonolysis devices used in the present invention. The figure which shows the relationship between the number of series connection of an ozonolysis device, and ozone concentration. FIG. 1 is a schematic view showing the internal structure of a plurality of parallel connected ozonolysis devices used in the present invention. The figure which shows the installation position of an ozone generator and an ozonolysis device.

Hereinafter, an embodiment of the sterilizer of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view showing an internal structure of a sterilizer according to an embodiment of the present invention, and FIG. 2 is a front view of the sterilizer.
As shown in FIG. 2, the sterilizer 100 has a shape like an oven range, and has an open / close door 10 for taking in and out an object to be sterilized in the front, various switch buttons 20a to 20c, a timer 30, and a display And lamps 40a to 40d.
The door 10 is provided with a glass window 12 for visualizing an object to be disinfected contained therein, and a handle 14 for opening and closing the open / close door 10. Further, the open / close door 10 is provided with a lock means (not shown).

As shown in FIG. 1, the inside of the sterilizing apparatus 100 is composed of a sterilizing chamber 50 for containing the object to be disinfected 51 and a control room 60 in which a controller 62 is installed.
On the ceiling of the sterilization chamber 50, an ultraviolet lamp 53 as an ozone generation source and an ultraviolet lamp 54 for performing decomposition treatment of residual ozone after the sterilization processing are installed. Stirring fans 56a and 56b covered with 55b are installed. In the sterilization chamber 50, a detachable grid shelf 52 may be provided to place the object to be disinfected 51 thereon.
In addition, a sensor 55 for detecting the ozone concentration is installed at an appropriate position of the sterilization chamber 50.

The controller 62 installed in the control room 60 performs drive control of the ultraviolet lamp 53 and the ultraviolet lamp 54 described above and opening / closing control of the open / close door 10.
The controller 62 controls the stirring fans 56a and 56b and the display lamps 40a to 40d in response to the operation of the switch buttons 20a to 20c and the timer 30, or in response to the ozone concentration signal from the sensor 55. It performs control such as releasing 10 lock.
The sterilization chamber 50 and the control chamber 60 are completely shielded by the separating wall 58.

Next, the ultraviolet ray lamp 53 which is an ozone generation source used in the present invention, and the ultraviolet ray lamp 54 for performing the decomposition process of residual ozone will be described.
In general, ultraviolet light (VUV) having a peak wavelength of 185 nm and a wavelength range of 10 to 200 nm is called ozone radiation, and is known to generate ozone having a deodorizing and sterilizing effect.
On the other hand, ultraviolet light (UV-C) with a peak wavelength of 254 nm and a wavelength range of 200 to 280 nm is called a sterilizing line, has a bactericidal effect but no deodorizing effect, and can not generate ozone. Are known. And it is also known that ultraviolet light (UV-C) is absorbed by ozone.
In addition, the peak wavelength 185 nm of an ozone ray and the peak wavelength 254 nm of a sterilizing line showed a typical value, and also when it exists in the range of several nm from the said value.

The inventors of the present application have repeatedly conducted experiments of irradiating ultraviolet light (UV-C) to ozone based on the above-mentioned known facts, and as a result, when the energy of ultraviolet light (UV-C) to be irradiated is low, There was no change in ozone, but it was confirmed that ozone decomposed and disappeared when the irradiation energy was high.

The outline of the verification experiment conducted by the inventors is as follows.
<Content of experiment>
Step 1: Ozone is generated by an ozone generator in a closed chamber.
Step 2: Stop the ozone generator.
Step 3: Measure the ozone concentration in the closed chamber.
Step 4: Measure the ozone concentration at natural extinction for comparison.
<Measurement conditions>
Closed chamber: 300 (w) x 300 (D) x 400 (H)
Ozone concentration sensor: MS70-MONTOR
UV light source: GL-8 (8 W)
UV light source drive circuit: Inverter drive (50 kHz)

FIG. 3 shows the wavelength spectrum of the UV light source used in the experiment.
Moreover, FIG. 4 shows an experimental result, and shows the change of the ozone concentration with respect to elapsed time.
As apparent from FIG. 4, the time for the residual ozone concentration to go from 10 ppm to 1 ppm is 40 minutes if it is caused by natural extinction, but it is 8 minutes if it is irradiated with ultraviolet (UV-C) light. It can be seen that it has been significantly shortened.

Based on the above-described experimental results, it is preferable to use an ultraviolet lamp that cuts ozone rays (185 nm) and mainly emits germicidal rays (254 nm) as the ultraviolet lamp 54 used in the present invention.
On the other hand, since the ultraviolet lamp 53 is used as an ozone generation source, it may be any lamp that generates ultraviolet rays (ozone rays) having a peak wavelength of 185 nm and a wavelength range of 10 to 200 nm. It may be a so-called ozone lamp which emits ultraviolet light of both the line and germicidal line wavelengths.

As described above, the present invention is characterized in that two types of ultraviolet lamps are used, one as an ozone generation source and the other as an ozone decomposition / depletion source.
The ultraviolet lamp 53 generates ozone by ultraviolet irradiation of air, but may be replaced with an ozone generator that generates ozone by using discharge in air.

Next, the operation of the sterilization apparatus 100 will be described based on the process chart of FIG.
The sterilization apparatus has been initialized in advance, all of the ultraviolet lamps 53 and 54 and the stirring fans 56a and 56b are turned off, and the open / close door 10 is unlocked.
In order to sterilize, open the front door 10, place the object 51 on the lattice shelf 52 in the sterilization chamber 50, close the door 10 and press the start button 20a (step 90) ). Then, the controller 62 locks the open / close door 10 by lock means (not shown) (step 91). This prevents the door 10 from being accidentally opened to release ozone to the outside.

Then, the sterilization process starts, and the controller 62 turns on the ultraviolet lamp 53, the stirring fans 56a and 56b, and the display lamp 40a to start measuring time (step 92).
When the ultraviolet lamp 53 is turned on, the air in the sterilization chamber 50 is changed to ozone, the air containing ozone is agitated in the sterilization chamber 50 by the agitation fans 56a and 56b, and the object 51 is exposed to ozone. And sterilization is performed. In the sterilization processing step 92, sterilization by ultraviolet irradiation with the ultraviolet lamp 53 is also performed in parallel. The time required for sterilization varies depending on the type and amount of the object to be disinfected 51, and is set in advance by the timer 30.

When the time set by the timer 30, which is expected to be completely disinfected by ozone in the sterilization process 92, has elapsed, the controller 62 ends the sterilization process 92 and proceeds to the ozonolysis process (step 93). ).
In the ozonolysis processing step 93, the controller 62 turns off the ultraviolet lamp 53 and the display lamp 40a, keeps the stirring fans 56a and 56b on, and turns on the ultraviolet lamp 54 and the display lamp 40b. The operator knows that the ozonolysis processing step 93 is in progress by turning on the display lamp 40b.

The time when the decomposition process of ozone ends is determined by the detection value of the ozone concentration in the sterilization chamber 50 by the ozone concentration detection sensor 55. If the ozonolysis process is set to end when the ozone concentration reaches 1 ppm, the controller 62 terminates the ozonolysis process step 93 when the detected value of the sensor 55 measures 1 ppm. Proceed to the end step (step 94).

In the end step 94, the controller turns off the stirring fans 56a and 56b, the ultraviolet lamp 54, and the display lamp 40b, turns the sterilization end step display lamp 40c on, and releases the lock of the open / close door 10. It is known that the operator is in the end process 94 from the lighting of the display lamp 40c.
When the lock of the open / close door 10 is released, the display lamp 40c is turned off and the display lamp 40d is turned on. The worker can take out the object to be sterilized 51 whose sterilization processing has been completed from the sterilization chamber 50 by turning on the display lamp 40d.
When the end process 94 is finished, the sterilizer 100 is initialized 95.

In addition to the start button 20a for sterilizing in a predetermined process as shown in FIG. 5, the sterilizer 100 has a forcible stop button 20b for forcibly stopping the operation and a forcible execution of the sterilizing process. The sterilization button 20c may be provided.
When the forcible sterilization button 20c is pressed, the sterilization process 92 is continued until the forcible stop button 20b is pressed.

The present invention is not limited to the above-described embodiment, and various modifications are possible. For example, without using the ozone concentration detection sensor 55, the lock of the open / close door may be released after a predetermined time has elapsed. In this case, the predetermined time may be arbitrarily set by a timer according to the type and amount of the object to be disinfected. The ozone generation source is not limited to the ultraviolet lamp 53, and may be an excimer lamp, an ultraviolet source such as an LED, a discharge device for silent discharge in air, a creeping discharge, or an electrolytic ozone generator. It is also possible to use.
In addition, instead of the ultraviolet lamp 54 for decomposing ozone, by embedding a plurality of LEDs emitting ultraviolet light with a peak wavelength of 254 nm on the inner wall surface of the sterilization chamber 50, a more compact sterilization device can be obtained. .

Further, in the ozonolysis process step 93, when the ultraviolet light from the ultraviolet lamp 54 is directly irradiated to the object to be disinfected, the characteristics of the object to be disinfected may be deteriorated. For example, when the object to be sterilized is a skin product, the skin becomes hard due to the irradiation of ultraviolet light. Therefore, as shown in FIG. 1, in order to prevent direct irradiation of the ultraviolet light onto the object to be disinfected by the ultraviolet light lamp 54, at a position where the irradiation of ultraviolet light from the ultraviolet light lamp 54 is blocked between the ultraviolet lamp 54 and the object to be disinfected. A light shielding plate 57 may be provided.
In the above-mentioned embodiment, although the ultraviolet ray lamp which has an ozonolysis action was installed alone in the sterilization chamber and used as an ozonolysis device, by using the ozonolysis device which installed the ultraviolet ray lamp in the enclosure container Further, the ozonolysis performance can be improved.

Hereinafter, the improved ozonolysis device will be described.
FIG. 6 is a schematic view showing the internal structure of the ozonolysis unit 200 used in the sterilization apparatus of the present invention. 6a is a cross-sectional view, and FIG. 6b is a cross-sectional view taken along the line AA 'of FIG. 6a.
An ultraviolet lamp 202 is mounted on the terminal block 203 a, 203 b and installed in a cylindrical enclosure 201 having an inlet 208 and an outlet 209. The ultraviolet lamp 202 is the same as that used in the above embodiment, ultraviolet light in the wavelength range having ozonolysis, ie, ultraviolet light in the wavelength range of 200 to 280 nm with a peak wavelength of 254 nm, from the inlet 208 toward the outlet 209 It radiates to the inflowing fluid.
A fan 204 is attached to the outlet 209 as a flow member for moving the fluid containing ozone flowing from the inlet 208 toward the outlet 209.
Ozone is decomposed by irradiating the fluid with ultraviolet light from the ultraviolet lamp 202.
At least the inner wall surface of the sealing container 201 has unevenness, and the sealing container 201 is made of a metal that functions as a catalyst during ozonolysis. As such a metal, aluminum, copper, nickel, palladium, silver, tin, lead, titanium, iron, or a mixture thereof is used. Alternatively, a non-metallic container such as a plastic may be used as the sealing container 201, and the metal that functions as a catalyst at the time of ozone decomposition may be applied to the inner wall surface. In addition, the shape of the enclosed container 201 is not limited to a cylindrical shape, It is good also as prismatic shape.
In addition, if a turbulent flow plate that blocks the progress of the fluid containing ozone is attached to the sealed container 201 so that the mounting angle with the inner wall surface of the sealed container 201 is 90 ° or more with respect to the traveling direction of the fluid. good. By mounting one or more such turbulent flow plates, the progressing speed of the fluid is slowed, and since the exposure to the ultraviolet light from the ultraviolet lamp 202 is made for a long time, the decomposition of ozone is further promoted.

FIG. 7 is a schematic view showing the internal structure of the ozonizer 200 to which the turbulent flow plate 210 is attached, FIG. 7 a is a cross sectional view, and FIG. 7 b is a plan view showing an example of the turbulent flow plate 210.
Although various shapes can be considered as the turbulent flow plate 210, the turbulent flow plate 210 shown in FIG. 7 b is configured by a disk provided with a hole through which the ultraviolet lamp 202 passes in the center.
The material of the turbulent flow plate 210 is not particularly limited, but it is preferable to use a metal that functions as a catalyst during ozonolysis.

FIG. 8 is a plan view showing the shapes of various turbulence plates 210. As shown in FIG.
The turbulence plate shown in FIG. 8 a has a large diameter hole 2011 at the center through which the ultraviolet lamp 202 passes, and the fluid flows through the hole 2011 around the ultraviolet lamp 202.
The turbulent flow plate shown in FIG. 8b has a hole having the same diameter as the outer diameter of the ultraviolet ray lamp 202 at the center through which the ultraviolet ray lamp 202 passes, and has a plurality of small diameter holes 2012 for passing the fluid around the periphery.
In the case where a plurality of turbulent flow plates are installed in the enclosed container, the turbulent flow plates 210A and 210B adjacent to each other have different patterns as shown in FIG. 9 to further promote the generation of turbulent flow. can do.

The inventors of the present application prototyped the ozonolysis device 200 shown in FIG. 6, connected them as shown in FIG. 10, and verified that ozone was decomposed and disappeared.
The outline of the verification experiment conducted by the inventors is as follows.

As shown in FIG. 10, the outlet of the ozonizer 300 is connected to the inlet of the ozonizer 200, and the pump 400 is connected to the inlet of the ozonizer 300 to feed air into the ozonizer 300. Next, the ozone generator 300 is driven to generate ozone. The generated ozone is sent to the ozonizer 200, and the ozonizer 200 is driven to decompose the ozone. The ozone concentration is measured by an ozone concentration sensor 500 installed at the outlet of the ozonolysis unit 200.
In addition, the ozone concentration change by natural decomposition was also measured for comparison.
The specifications of the ozonizer, pump and ozone concentration sensor used in the verification experiment are as follows.
<Ozone decomposition device>
UV light source: GL-8 (8 W)
UV light source drive circuit: Inverter drive (50 kHz)
Material of enclosed container: Aluminum Dimensions of enclosed container: Cylindrical pipe 45 mm in diameter and 390 mm in length <pump>
Pump flow rate: 4 L / min
<Ozone concentration sensor>
MS70-MONTOR

FIG. 11 is a diagram showing the verification results, showing changes in ozone concentration (ppm) with respect to elapsed time (minutes). As apparent from the figure, in the case of natural decomposition, the ozone concentration does not decrease from 10 ppm even when time passes, whereas when using the ozonolysis device according to the present invention, ozone only takes 8 minutes. It can be seen that the concentration decays rapidly from 10 ppm to 1 ppm.

FIG. 12 is a view showing another embodiment of the ozonolysis unit 600 configured by connecting a plurality of ozonolysis units shown in FIG. 6 in series. Three sealed containers 201a, 201b, 201c are connected in series by connection hoses 205a, 205b. In the enclosed container 201a, ultraviolet lamps 202a are installed by terminal blocks 203a1 and 203a2. Also, a fan 204 is attached to the outlet 209a. One end of a connection hose 205a is connected to the inlet of the sealed container 201a. In the enclosed container 201b, ultraviolet lamps 202b are installed by terminal blocks 203b1 and 203b2. One end of a connection hose 205b is connected to the inlet of the sealed container 201b, and the other end of the connection hose 205a is connected to an outlet.
The fluid containing ozone flows in from the inlet 208 c of the sealed container 201 c and flows out from the outlet 209 a of the sealed container 201 a.

By connecting a plurality of ozonolysis units in series in this manner, the ability to decompose ozone can be improved without reducing the inflow rate.
In the embodiment of FIG. 12, three ozonizers are connected in series, but the number of connections can be appropriately determined in accordance with the concentration of ozone to be decomposed and the amount of ozone.

The inventors conducted an experiment to investigate the relationship between the number of serially connected ozonizers and the ozone concentration at the outlet.
FIG. 13 is a diagram showing experimental results. The individual ozonolysis devices used in this experiment have the characteristic that the ozone concentration at the outlet becomes 10 ppm after 10 minutes.
As apparent from FIG. 13, it can be seen that the ozone concentration at the outlet becomes almost zero after 10 minutes if the number of connections is 3 or more.

In the present invention, a plurality of ozonolysis devices shown in FIG. 6 can be connected in parallel as shown in FIG.
The inlets of the sealed containers 201a, 201b, 201c are connected in parallel by a connection hose 205, and a fluid containing ozone flows from the common inlet 208 into the respective sealed containers 201a, 201b, 201c, and the respective outlets 209a, 209b, 209c. Flow out of In the case of parallel connection, the fans 204a, 204b and 204c are attached to the outlets 209a, 209b and 209c of the respective enclosed containers 201a, 201b and 201c.
By connecting a plurality of ozonolysis units in parallel in this manner, it is possible to shorten the ozonolysis time without reducing the ozone decomposition processing capacity.

The number of connected ozonizers connected in parallel can be appropriately determined according to the concentration of ozone to be decomposed and the amount of ozone.
Moreover, regarding the installation position of an ozone generator and an ozonolysis device, as shown to FIG. 15 a, it is also possible to install in a sterilization chamber, and as shown to FIG. 15 b, it is also possible to install outside sterilization chamber.

Reference Signs List 10 open / close door 20a to 20c switch button 30 timer 40a to 40d display lamp 50 sterilization chamber 53 ultraviolet lamp (ozone generation source, first ultraviolet source)
54 UV lamp (second UV source)
55 ozone concentration sensor 56a, 56b stirring fan 57 light shielding plate 60 control room 62 controller 100 sterilizer 200, 600, 700 ozonolysis device 201, 201a, 201b, 201c enclosed container 202, 202a, 202b, 202c ultraviolet lamp 203a, 203b, 203a1, 203b1, 203c1, 203a2, 203b2, 203c2 Terminal block 204, 204a, 204b, 204c Fan 205, 205a, 205b Connection hose 208, 208c Inlet 209, 209a Exit 210 Turbulent plate 2011 Large diameter hole 2012 Hole 300 around Ozone generator 400 pump 500 Ozone concentration sensor

Claims (23)

A sterilization chamber provided with an open / close door, an ozone generation source, an ultraviolet light source for emitting ultraviolet light in a wavelength range having an ozone decomposition action, and a sensor for detecting an ozone concentration;
A controller for performing drive control of the ozone generation source, the ultraviolet light source, and opening / closing control of the opening / closing door;
The controller
The open / close door is locked, the ozone generation source is driven to generate ozone, and the sterilization process is performed on the object contained in the sterilization chamber, and the ultraviolet light source is driven to terminate ozone after the sterilization process is completed. The sterilizer according to any one of the preceding claims, wherein when the sensor detects that the ozone concentration in the sterilization chamber has dropped to a predetermined value, the lock of the open / close door is released. A sterilization chamber provided with an open / close door, an ozone generation source, and an ultraviolet light source for emitting ultraviolet light in a wavelength range having an ozone decomposition action;
A controller for performing drive control of the ozone generation source, the ultraviolet light source, and opening / closing control of the opening / closing door;
The controller
The open / close door is locked, the ozone generation source is driven to generate ozone, and the sterilization process is performed on the object contained in the sterilization chamber, and the ultraviolet light source is driven to terminate ozone after the sterilization process is completed. A sterilizing apparatus for executing the disassembling process and releasing the lock of the open / close door after a predetermined time has elapsed. The sterilizing apparatus according to claim 1 or 2, wherein the sterilizing chamber is provided with a light shielding plate at a position where the object to be sterilized is shielded from the irradiation of the ultraviolet light. The sterilizer according to any one of claims 1 to 3, wherein the wavelength range is a wavelength range of 200 to 280 nm having a peak wavelength of 254 nm. The sterilizer according to any one of claims 1 to 3, wherein the ozone generation source generates ozone by discharge in air or ultraviolet irradiation of air. An open / close door, a first ultraviolet light source emitting ultraviolet light in a first wavelength range having an ozone generation function, a second ultraviolet light source emitting ultraviolet light in a second wavelength range having an ozone decomposition function, ozone concentration A sterilizing chamber provided with a sensor for detecting
A controller for performing drive control of the first ultraviolet light source and the second ultraviolet light source and opening / closing control of the open / close door;
The controller
The open / close door is locked, the first ultraviolet light source is driven to generate ozone, and the sterilization process is performed on the object contained in the sterilization chamber, and the second ultraviolet light source is performed after the sterilization process is completed. Driving the decomposition processing of ozone, and when the sensor detects that the ozone concentration in the sterilization chamber has dropped to a predetermined value, the lock of the open / close door is released. There is provided an open / close door, a first ultraviolet light source emitting ultraviolet light in a first wavelength range having an ozone generating action, and a second ultraviolet light source emitting ultraviolet rays in a second wavelength range having an ozonolytic action Sterilization room and;
A controller for performing drive control of the first ultraviolet light source and the second ultraviolet light source and opening / closing control of the open / close door;
The controller
The open / close door is locked, the first ultraviolet light source is driven to generate ozone, and the sterilization process is performed on the object contained in the sterilization chamber, and the second ultraviolet light source is performed after the sterilization process is completed. Driving the decomposition processing of ozone and releasing the lock of the open / close door after a predetermined time has elapsed. The sterilizer according to claim 6 or 7, wherein the sterilizing chamber is provided with a light shielding plate at a position where the object to be sterilized is shielded from the irradiation of the ultraviolet light of the second wavelength range. The first wavelength range is a 10 to 200 nm wavelength range with a peak wavelength of 185 nm, and the second wavelength range is a 200 to 280 nm wavelength range with a peak wavelength of 254 nm. The sterilizer according to any one of 6 to 8. The sterilizer according to any one of claims 1 to 9, wherein a stirring fan is installed in the sterilizing chamber. And a sterilization room provided with an open / close door and a sensor for detecting ozone concentration;
An ozone generator that generates ozone and flows the generated ozone into the sterilization chamber;
An ozonizer for decomposing the ozone introduced into the sterilization chamber;
A controller for performing drive control of the ozone generator and the ozonizer and opening / closing control of the open / close door;
The decomposer comprises an enclosed container having an inlet and an outlet, and an ultraviolet light source disposed in the enclosed container and directly irradiating ultraviolet light in a wavelength range having an ozonolytic action on the fluid flowing in from the inlet. And
The controller
Locking the open / close door and driving the ozone generator to flow ozone into the sterilization chamber;
Execute sterilization processing of an object to be sterilized contained in the sterilization chamber;
The ozonolysis device is driven to execute ozone decomposition processing during and after continuation of the sterilization treatment, and when the sensor detects that the ozone concentration in the sterilization chamber has dropped to a predetermined value, the open / close door A sterilizer characterized by releasing the lock. A sterilization room with an open / close door;
An ozone generator that generates ozone and flows the generated ozone into the sterilization chamber;
An ozonizer for decomposing the ozone introduced into the sterilization chamber;
A controller for performing drive control of the ozone generator and the ozonizer and opening / closing control of the open / close door;
The decomposer comprises an enclosed container having an inlet and an outlet, and an ultraviolet light source disposed in the enclosed container and directly irradiating ultraviolet light in a wavelength range having an ozonolytic action on the fluid flowing in from the inlet. And
The controller
Locking the open / close door and driving the ozone generator to flow ozone into the sterilization chamber;
Execute sterilization processing of an object to be sterilized contained in the sterilization chamber;
A sterilization apparatus, wherein the ozonolysis device is driven during and after completion of the sterilization treatment to execute decomposition treatment of ozone, and the lock of the open / close door is released after a predetermined time has elapsed. 13. The sterilizer according to claim 11, wherein the wavelength range is a wavelength range of 200 to 280 nm with a peak wavelength of 254 nm. The sterilizing apparatus according to claim 11 or 12, wherein at least the inner wall surface of the sealing container has unevenness, and the sealing container is a metal that functions as a catalyst at the time of ozonolysis. The sterilizing apparatus according to claim 11 or 12, wherein the enclosed container has a metal that functions as a catalyst at the time of ozonolysis applied to the inner wall surface thereof. The sterilizer according to claim 14 or 15, wherein the metal is aluminum, copper, nickel, palladium, silver, tin, lead, titanium, iron, or a mixture thereof. The sterilizing apparatus according to claim 11 or 12, wherein the enclosed container includes a flow member for moving the fluid flowing from the inlet toward the outlet. The sterilizer according to claim 11 or 12, wherein a turbulent flow plate is attached to the enclosed container to prevent the flow of the fluid. The sterilizer according to claim 18, wherein the turbulent flow plate is attached such that an attachment angle with the inner wall surface of the enclosed container is 90 ° or more with respect to the traveling direction of the fluid. The sterilizer according to claim 11 or 12, wherein the ozonolysis unit is configured by connecting a plurality of ozonolysis units in series. The sterilizer according to claim 11 or 12, wherein the ozonolysis unit is configured by connecting the inlets of a plurality of ozonolysis units in parallel. The sterilizer according to claim 11 or 12, wherein the ozonizer and the ozonolysis unit are installed in the sterilizing chamber. The sterilizer according to claim 11 or 12, wherein the ozone generator and the ozonolysis device are installed outside the sterilizer.

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