JPH08155013A - Ozone fumigation sterilizing device - Google Patents

Abstract

PURPOSE: To make it possible to exactly detect the concn. of the ozone to determine the end of the operation of an ozone fumigation sterilizing device by closing a detecting passage through which an ozone sensor communicates with a space to be deodorized and sterilized when the ozone concn. in the space to be deodorized and sterilized is above a prescribed value. CONSTITUTION: A damper 38 of the detecting passage 37 to the ozone senser 36 is opened to open the detecting passage 37 and the ozone concn. is detected by the ozone sensor 36 when the ozone fumigation sterilizing device 1 operates normally. The damper 38 is closed and the detecting passage 37 is closed when the ozone concn. detected by the ozone sensor 36 attains a prescribed value, for example, >=0.1ppm. As a result, the ozone sensor 36 is isolated from the air of the ozone concn. of about >=0.1ppm. The control of the ozone fumigation system 2 is continued for the time set by a timer. The ozone fumigation system 2 is stopped and the operation of the ozone detecting system 3 is started to remove the ozone after the timer times out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an ozone fumigation sterilizer which is placed in a space requiring deodorization and sterilization, and can sterilize the space with ozone and decompose ozone after deodorization. Regarding the device.

[0002]

2. Description of the Related Art Conventionally, for example, an ozone fumigation sterilizer disclosed in Japanese Patent Laid-Open No. 5-57005 mixes ozone generated by an ozone generator with air sucked from a sterilized space to be disinfected, and air containing this ozone is mixed. To the deodorized sterilization space to circulate air, a ozone removal system for removing ozone from the air in the disinfection sterilization space, and system control means for controlling these systems. .

With this configuration, the sterilization / reflux system is operated for a predetermined time, and air mixed with ozone is circulated into the space to be deodorized for deodorization and sterilization in the space to be deodorized, and then ozone is removed. The system is operated to remove ozone that is harmful to the human body from the deodorized sterilization space.

[0004]

However, the standard measurement width of the ozone sensor used in the conventional ozone fumigation sterilizer is in the range of 0.05 to 10 PPM, and this kind of ozone sensor is used for deodorant sterilization process by ozone. When exposed to ozone of high concentration (200PPM), the detection signal overflows greatly because it greatly exceeds the detection value of the ozone sensor, so it takes a considerable time for the detection result of this ozone sensor to return to a normal value. Was needed.

Specifically, when ozone decomposition is started from a state where the ozone concentration in the space to be deodorized and sterilized is 100 PPM, and when the measurement result by a large-scale ultraviolet ozone measuring device shows 0.1 PPM or less. However, the measurement result of the ozone sensor shows a value considerably higher than that of the measuring device, and the measurement result of the ozone sensor is 0.1
PPM or less was 1 to 3 hours after the measurement result of the large-sized ozone measuring device showed 0.01 PPM or less. This causes a problem that the display of the signal indicating the stop of the deodorant sterilization work by the ozone deodorant sterilizer is delayed.

Therefore, the present invention is to provide an ozone fumigation sterilizer capable of preventing the detection delay due to the overflow of the ozone sensor and accurately detecting the ozone concentration which determines the end of the work.

[0007]

SUMMARY OF THE INVENTION Therefore, the invention according to claim 1 is an ozone fumigation system for blowing air containing ozone into a deodorized sterilization space to disinfect and sterilize the deodorized sterilization space. After the operation of the ozone fumigation system, in an ozone fumigation sterilizer having an ozone removal system for removing ozone from the air in the deodorized sterilization space, an ozone sensor for detecting the amount of ozone in the deodorized sterilization space, and the ozone sensor. And a closing means for closing the detection passage when the ozone concentration in the deodorized sterilization space is equal to or higher than a predetermined value. The closing means is a damper or a pump provided in the passage.

Further, the invention according to claim 2 is an ozone fumigation system for blowing air containing ozone into the deodorized sterilization space to disinfect and sterilize the deodorized sterilization space, and after the operation of the ozone fumigation system, In an ozone fumigation sterilizer having an ozone removal system for removing ozone from the air in the deodorized sterilization space, an ozone sensor for detecting the amount of ozone in the deodorized sterilization space, the ozone sensor and the deodorized sterilization space And a detection passage that communicates with the ozone fumigation system, the detection passage is closed when the ozone concentration in the deodorized sterilization space becomes a predetermined value or more by the operation of the ozone fumigation system, and the ozone removal system operates for a predetermined time. It is provided with an opening / closing means for releasing the detection passage when the above condition elapses. The opening / closing means is a damper or a pump provided in the passage.

[0009]

Accordingly, in the first aspect of the present invention,
When the ozone concentration in the deodorized sterilization space is equal to or higher than a predetermined value, the detection passage that connects the ozone sensor and the deodorized sterilization space is closed by the closing means. It is possible to prevent the exposure to, and it is possible to achieve the above problems.

According to the second aspect of the present invention, the opening / closing means provides a detection passage for connecting the ozone sensor and the deodorized sterilization space when the ozone concentration exceeds a predetermined value due to the operation of the ozone fumigation system. Since the detection passage is opened when the ozone removal system is closed for a predetermined time, the ozone sensor is not exposed to high-concentration ozone, and the ozone removal system is operated for a predetermined time. Since the detection passage is released when ozone is decomposed, residual ozone in the deodorized sterilization space can be efficiently detected, so that the above-mentioned object can be achieved.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. The ozone fumigation sterilizer 1 shown in FIG. 1 has an ozone fumigation system 2 and an ozone removal system 3 in a case 101, and the ozone fumigation sterilizer 1 itself is arranged in a deodorized sterilization space 100, and Deodorant sterilization space 100
The inside is fumigated with ozone, and the deodorant sterilization space 1
00 may be a hospital room, an operating room, a restaurant kitchen, a guest seat, or the like.

The ozone fumigation system 2 includes a blower 21.
Has a first air passage 22 in which an ozone outlet 23 and a humidifying port 24 are opened, and a heat dissipation heat exchanger 55 of an ozone generator 30 described below is provided. It is distributed.

The ozone generator 30 is a normally silent discharge type ozone generator, and the ozone supplied from the oxygen supply port 56 is passed by passing between electrodes which are in a silent discharge state by applying a high voltage. Is a device for generating.
The ozone generator 30 has a cooling cycle 51 in order to generate high heat. The cooling cycle 51 is formed by connecting an endothermic heat exchanger 52, the heat radiating heat exchanger 55, and a pump 53 in series by pipes. The cooling water supplied from the cooling water supply tank 54 is The pump 53 circulates in the cooling cycle 51, and the heat exchanger 52 for heat absorption
Dissipate heat in the heat exchanger 55
The ozone generator 30 is cooled. A valve 55 for adjusting the blowing of ozone is provided between the ozone generator 30 and the ozone outlet 23. The valve 55 is usually a solenoid valve.

The humidifier 26 is provided in order to obtain the relative humidity (80% RH or more) most suitable for the fumigation and sterilization work by ozone, and an ultrasonic humidifier is used in this embodiment. As a result, steam vaporized by ultrasonic waves is mixed into the air flowing in from the inflow port 28 opened in the second air passage 22, and the steam-mixed air is further supplied from the humidification port 24 to the second passage. It is mixed in the air flowing through 22 and discharged into the deodorized sterilization space, and the deodorized sterilization space is maintained at a predetermined relative humidity (80% RH or more). In addition, 27 is a tank for storing water used in the humidifier 26.

In the ozone fumigation system 2 having the above structure, the air in the deodorized sterilization space 100 is guided from the suction port 22a into the first passage 22 by the operation of the blower 21.
By opening the solenoid valve 35, ozone blown out from the ozone outlet 23 and high-humidity air blown out from the humidifying port 24 are mixed and blown out into the deodorized sterilization space 100 from the outlet 22b. As a result, the ozone concentration in the deodorized and sterilized space 100 is increased, and the deodorized and sterilized space 100 can be deodorized and sterilized.

The ozone removing system 3 includes a blower 31.
Has a second passage 32 in which
An ozone decomposition catalyst 33 is arranged on the top. Further, conventionally, as shown in FIG. 4, a second upstream side of the ozone decomposition catalyst 33 is provided.
Although the ozone sensor 36 is disposed on the passage 32 of the above, in the present invention, as shown in FIG. 1, a passage (detection passage) 37 that bypasses the ozone decomposition catalyst 33 is formed, and the ozone is provided on the detection passage 37. The sensor 36 is provided. Further, a damper 38 driven by an actuator 39 is arranged in the detection passage 37, and the detection passage 37 is opened and closed by driving the actuator 39.

As a result, when the blower 31 is operated, the air in the deodorized sterilization space 100 is sucked into the second passage 32 through the suction 34 and passes through the ozone decomposition catalyst 33. As a result, the ozone contained in the inhaled air is decomposed, and the air not containing ozone is returned to the deodorized sterilization space 100 to reduce the ozone concentration in the deodorized sterilization space 100.

In the case 101 of the ozone fumigation sterilizer 1, an in-case pressurizing system 4 is arranged. The pressurization system 4 in this case is the ozone decomposition catalyst 4
1 and a pressurizing pump 42. As a result, when the pump 42 operates, the air in the deodorized sterilization space 100 is sucked, and the ozone in the intake air is decomposed by passing through the ozone decomposition catalyst 41. This ozone-free air
The case is discharged from the pump 42 into the case 101.
In order to increase the pressure inside 1, the ozone can be prevented from entering the case 101 through the gap of the case 101.

An operation panel 6 and a control unit are provided to control the ozone fumigation and sterilization apparatus 1 having the above-described structure, and the ozone concentration in the disinfected and sterilized space 100 is a predetermined value (eg 0.1 PPM) or more. A red patrol lamp 7 that lights up in a certain case and a green patrol lamp 8 that lights up when the value is equal to or less than a predetermined value are provided.

An example of control of the ozone fumigation sterilizer 1 will be described below with reference to the flow chart shown in FIG.

The ozone fumigation sterilization control started in step 200 is started by turning on a start switch (not shown) of the operation panel 6, and in step 210, first, the ozone fumigation system 2 and a device associated with the ozone fumigation system 2 (for example, the fumigation system 2). The in-case pressurizing system 4) operates. Specifically, the ozone generator 30, the pump 53,
42, the blower 21, the humidifier 26, the solenoid valve 55, and the ozone decomposition catalyst 41 start operation.

When the ozone fumigation system 2 starts to operate in step 210, the timer 1 (TIMER1) starts (ON) in step 220. This timer 1
Is for setting the operating time of the ozone fumigation system 2,
Although it changes depending on the size of the deodorized sterilization space 100, it is usually set to 120 to 240 minutes.

In step 230, it is judged whether or not the ozone fumigation system 2 is abnormal. In this determination, if there is no abnormality in each control device, step 240
Then, the actuator 39 is driven to open the detection passage 37 leading to the ozone sensor 36, and the damper 38
Opens. The ozone concentration is detected by the ozone sensor 36. If there is an abnormality in the determination in step 230, the process proceeds to step 280 to stop (turn off) the ozone fumigation system 2.

In step 250, it is determined whether or not the ozone concentration Q (O ₃ ) detected by the ozone sensor 36 released in step 240 is 0.1 PPM or more. In this judgment, the ozone concentration Q (O ₃ ) is 0.1
When the pressure exceeds PPM, the process proceeds to step 260 and the damper 3
8 is closed to close the detection passage 37 to isolate the ozone sensor 36 from the air having an ozone concentration of 0.1 PPM or more.

In step 270, the control of the ozone fumigation system 2 is continued for the predetermined time set by the timer 1, and when the timer 1 ends (TIMER1 UP), step 2
Proceeding to 80, the operation of the ozone fumigation system 2 is stopped (OFF), and in step 290, the ozone removal system 3 is started (ON). Specifically, it is operation of the blower 31 and heating of the ozone decomposition catalyst 33.

In step 300, the timer 2 (TIMER2) is started (turned on) at the same time when the ozone removal system 3 is started, and in step 310, the timer 2 (TIMER2) is started.
Determine the end of (TIMER2 UP). If it is determined in this determination that the ozone removal system has been operating for the predetermined time, the routine proceeds to step 320, the damper 38 is opened to open the detection passage 37, and the ozone concentration 36 is measured by the ozone sensor 36.
(O ₃ ) is detected. In addition, the set time of the timer 2 is set in advance by an experiment to obtain a time when the ozone concentration becomes a predetermined value or less (for example, 10 PPM or less) after the operation of the ozone removal system 3.

When the detection passage is opened in step 320, the ozone sensor 36 resumes the detection of the ozone concentration Q (O ₃ ). In step 330, the ozone concentration Q (O ₃ ) is equal to or more than a predetermined value (0.08 PPM). It is determined whether or not. If the ozone concentration Q (O ₃ ) is greater than or equal to the predetermined value in this determination, the ozone removal system 2 continues to operate, and the ozone concentration Q (O ₃ ) is less than or equal to the predetermined value in the determination in step 330. Step 34
Go to 0 and stop the operation of ozone removal system 2 (OFF)
To be done. Due to this stop, the red patrol lamp 7 goes out,
The green patrol lamp 8 lights up to indicate that the deodorant sterilization space 100 is safe.

When it is determined that there is an abnormality during the operation of the ozone fumigation system 2, step 2
After stopping the ozone fumigation system 2 at 70, the ozone removal system 3 is promptly operated to remove the deodorant sterilization space 10
Ozone in 0 is decomposed to make the inside of the deodorant sterilization space 100 safe. When an abnormality occurs in the ozone removal system 3, the red patrol lamp 7 is turned on for a predetermined time (about 6 hours) to wait for the ozone to disappear by natural decomposition, and then the ventilation is performed.

From the above, according to the present invention, the detection passage 37 having the ozone sensor 36 is provided, and the damper 38 for opening and closing the detection passage 37 is arranged in the detection passage 37, and the deodorant sterilization space 100 is provided. Since the detection passage 37 is closed by closing the damper 38 when the ozone concentration of the ozone sensor exceeds a predetermined value, the ozone sensor 36 can be shielded from the air containing the high concentration of ozone, The detection sensitivity of can be always maintained in a good state.

As a result, the operation of the ozone removal system 3 continues for a predetermined time, and when the ozone concentration falls below the predetermined value, the detection by the ozone sensor 36 is started,
The ozone concentration for determining the end of operation of the ozone removal system 3 can be accurately detected, and the operation stop time of the ozone fumigation and sterilization apparatus 1 can be shortened by about 2 to 3 hours as compared with the conventional one. is there.

That is, conventionally, the ozone that determines the end of operation of the fumigation apparatus 1 for ozone is determined from the malfunction caused by the overflow of the ozone sensor exposed to high-concentration ozone (the ozone concentration is detected to be high). Although it took a long time for the concentration detection value to reach the predetermined value, in the present invention, since the ozone concentration detection value can be accurately detected, the ozone concentration detection value that determines the end of operation reaches the predetermined value. It is possible to shorten the time until the time until now.

The intake of air into the detection passage 37 is performed by the operation of the blower 31. For example, the detection passage 3
When the discharge port 37a of No. 7 is on the outlet side of the blower 31, the air in the deodorized sterilization space 100 is sucked into the detection passage 37 by the Venturi effect. When the discharge port 37a of the detection passage 37 is provided on the suction side of the blower 31, the deodorant sterilization space 10 is removed by the suction force of the blower 31.
Zero air can be inhaled.

In the embodiment shown in FIG. 3, the damper 3 is used.
A pump 50 is used instead of 8. As the pump, a diaphragm type pump is optimal because of its simple structure, light weight, and easy maintenance, but it is not particularly limited as long as it has a pump function.

This pump 50 closes the detection passage 37 (step 2 in the flow chart of FIG. 2).
60), the operation is stopped and the detection passage 37 is opened (step 2 in the flowchart of FIG. 2).
40, step 320) is to start the operation, and has an advantage that the air from the deodorized sterilization space 100 can be forcibly guided to the detection passage 37 without the operation of the blower 31.

In the present embodiment, the detection passage 37 having the ozone sensor 36 is formed in the second passage 32 of the ozone removing system 3, but the ozone sensor is arranged in the first passage 22 of the ozone fumigation system 2. In this case, the detection passage 37 is formed in the first passage 22 to have the same configuration as that described above, and thereby the same effect as that shown in the above-described embodiment is obtained.

[0036]

As described above, according to the present invention, when the ozone concentration in the air is higher than the predetermined value, the ozone sensor is cut off from the air. In order to prevent delay,
The operation time of the conventional ozone fumigation sterilizer can be shortened by 2 to 3 hours. Moreover, since the ozone sensor is not exposed to high concentration ozone, the life of the sensor itself can be extended.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an example of an ozone fumigation sterilizer according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an example of ozone fumigation sterilization control according to the embodiment of the present invention.

FIG. 3 is a partial configuration diagram showing an example of a detection passage according to another embodiment of the present invention.

FIG. 4 is a partial configuration diagram illustrating an arrangement of a conventional ozone sensor.

[Explanation of symbols]

 1 Ozone fumigation sterilizer 2 Ozone fumigation system 3 Ozone removal system 4 In-case pressurization system 7 Red patrol lamp 8 Green patrol lamp 21,31 Blower 22 First passage 26 Humidifier 32 Second passage 33,41 Ozone decomposition catalyst 36 Ozone Sensor 37 Detection passage 38 Damper 42,53 Pump 50 Pump 51 Cooling cycle 100 Deodorant sterilization space 101 Case

Claims (2)

[Claims] 1. An ozone fumigation system for blowing air containing ozone into a deodorant sterilization space to disinfect and sterilize the deodorization sterilization space, and air in the deodorization sterilization space after the operation of the ozone fumigation system. In an ozone fumigation sterilizer having an ozone removal system for removing ozone from, an ozone sensor for detecting the amount of ozone in the deodorized sterilization space, and a detection passage that connects the ozone sensor and the deodorized sterilization space, An ozone fumigation sterilizer comprising: a closing unit that closes the detection passage when the ozone concentration in the deodorized sterilization space is equal to or higher than a predetermined value. 2. An ozone fumigation system for blowing air containing ozone into the deodorized sterilization space to disinfect and sterilize the deodorized sterilization space, and air in the deodorization sterilization space after the operation of the ozone fumigation system. In an ozone fumigation sterilizer having an ozone removal system for removing ozone from, an ozone sensor for detecting the amount of ozone in the deodorized sterilization space, and a detection passage that connects the ozone sensor and the deodorized sterilization space, The detection passage is closed when the ozone concentration in the deodorized sterilization space becomes a predetermined value or more due to the operation of the ozone fumigation system, and the detection passage when the operation of the ozone removal system has passed a predetermined time. An ozone fumigation and sterilizer equipped with an opening and closing means for releasing the ozone.