JP4773986B2 - Ozone gas sterilizer - Google Patents

Description

The present invention relates to an ozone gas permeation apparatus that permeates and sterilizes ozone gas through an object to be sterilized such as bedding.

Conventionally, in methods for sterilizing and sterilizing nursing care / medical institutional equipment and bedding, for heat-resistant objects to be sterilized, water is heated by a heater or the like to generate steam, and atmospheric pressure There is a method using a high-pressure steam sterilizer that sterilizes with saturated steam under a pressure exceeding (see Patent Document 1). Further, there is a method of sterilizing an object to be sterilized without heat resistance by infiltrating ethylene oxide (EOG) gas.
Japanese Patent Laid-Open No. 6-190024

  However, the above-described method using high-pressure steam sterilization cannot be applied to an object to be sterilized without heat resistance. Also, in the method of sterilizing by infiltrating ethylene oxide gas, it is necessary to leave for a long time or deaerate process in order to degas the residual gas after treatment. There are problems in terms of safety and sterilization efficiency, such as the need for a processing device. In addition, when the gas treatment is performed under normal pressure, there is a problem that the object to be sterilized, such as bedding, which is difficult to permeate gas cannot be sterilized efficiently.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

In claim 1, in the ozone gas sterilizer which has a sterilizer (1) which stores a sterilization subject inside, and a mechanism which supplies ozone gas in this sterilizer (1) , this sterilizer (1) The ozone detector (4) for detecting the ozone concentration in the inside, the control unit (6) for controlling the ozone concentration based on the detection result of the ozone detector (4), and the control status output for outputting the control status means (14) are provided on a substrate, the sterilizing chamber (1) out of the atmosphere gas sterilization box (1) supply to be supplied to the unit (11), an atmospheric gas within the sterilization chamber (1) out of the sterilization chamber An exhaust unit (12) for exhausting and a differential pressure detector (5) for detecting a differential pressure between the inside of the sterilizer (1) and the outside of the sterilizer (1) are provided, and the differential pressure detector (5) Based on the detection result, the pressure in the sterilizer (1) is changed to the control unit. (6), the control status is displayed by the control status output means (14), and the sterilizer (12) is operated by operating the supply unit (11) and the exhaust unit (12). 1) A mechanism capable of changing the internal pressure to a negative pressure and a positive pressure with respect to the pressure outside the sterilizer (1) is provided, and the ozone concentration in the sterilizer (1) subjected to the sterilization treatment and the sterilization treatment A calculation means for calculating the product of the time taken by the control unit, a control status output means (14) for displaying the calculation result as a sterilization effect index value, and a recording means (19) for recording. When the sterilization effect index value thus set does not reach a preset sterilization effect index value, the sterilization process is resumed, and the ozone concentration in the sterilization chamber (1) increases within a predetermined time from the start of the sterilization process. Change in ozone concentration gradient A calculating means for calculating, and an output means for outputting an alarm signal to the alarm device (23), and automatically operating the ozone gas sterilizer when the ozone concentration increase gradient becomes a set value or less within the predetermined time. In addition to stopping, an alarm is given by the alarm device (23) .

  As effects of the present invention, the following effects can be obtained.

In claim 1, in the ozone gas sterilizer which has a sterilizer (1) which stores a sterilization subject inside, and a mechanism which supplies ozone gas in this sterilizer (1) , this sterilizer (1) The ozone detector (4) for detecting the ozone concentration in the inside, the control unit (6) for controlling the ozone concentration based on the detection result of the ozone detector (4), and the control status output for outputting the control status means (14) are provided on a substrate, the sterilizing chamber (1) out of the atmosphere gas sterilization box (1) supply to be supplied to the unit (11), an atmospheric gas within the sterilization chamber (1) out of the sterilization chamber An exhaust unit (12) for exhausting and a differential pressure detector (5) for detecting a differential pressure between the inside of the sterilizer (1) and the outside of the sterilizer (1) are provided, and the differential pressure detector (5) Based on the detection result, the pressure in the sterilizer (1) is changed to the control unit. (6), the control status is displayed by the control status output means (14), and the sterilizer (12) is operated by operating the supply unit (11) and the exhaust unit (12). 1) A mechanism capable of changing the internal pressure to a negative pressure and a positive pressure with respect to the pressure outside the sterilizer (1) is provided, and the ozone concentration in the sterilizer (1) subjected to the sterilization treatment and the sterilization treatment A calculation means for calculating the product of the time taken by the control unit, a control status output means (14) for displaying the calculation result as a sterilization effect index value, and a recording means (19) for recording. When the sterilization effect index value thus set does not reach a preset sterilization effect index value, the sterilization process is resumed, and the ozone concentration in the sterilization chamber (1) increases within a predetermined time from the start of the sterilization process. Change in ozone concentration gradient A calculating means for calculating, and an output means for outputting an alarm signal to the alarm device (23), and automatically operating the ozone gas sterilizer when the ozone concentration increase gradient becomes a set value or less within the predetermined time. Since the alarm is stopped by the alarm device (23), it can be assured that the ozone concentration in the sterilizer is always controlled at a predetermined position based on the control status output from the control status output means. .

  Moreover, by introducing atmospheric gas outside the sterilization chamber together with ozone gas into the sterilization chamber, the amount of introduced gas can be increased, and the rise time of the ozone gas concentration in the entire sterilization chamber can be shortened.

  Moreover, it can be assured that the pressure in the sterilizer is always controlled at a predetermined position based on the control status output from the control status output means.

  In addition, when sterilizing an object to be sterilized installed in a sterilization chamber, maintaining the inside of the sterilization chamber at a positive pressure allows the atmosphere outside the sterilization chamber to contain harmful microorganisms such as bacteria and bacteria. It is possible to prevent gas from entering the sterilizer.

  In addition, when the object to be sterilized installed in the sterilization chamber is contaminated, the atmosphere gas that may be contaminated in the sterilization chamber is discharged outside by maintaining the negative pressure inside the sterilization chamber. Can be prevented.

  In addition, when sterilizing the object to be sterilized installed in the sterilization chamber, the penetration of ozone gas into the object to be sterilized is improved by changing the inside of the sterilization chamber from negative pressure to positive pressure. Can do.

  In addition, since sterilization of bacteria is usually required for several days, the sterilization effect that cannot be confirmed directly online is calculated, displayed, and recorded in the form of the product of ozone concentration and treatment time. It becomes possible.

  Also, compare the sterilization effect index value set in advance with the sterilization effect index value measured online, determine whether the set value is satisfied, and if not reached, continue the sterilization process again Thus, a desired sterilizing effect can be ensured.

Also, compare the set gradient with the measured ozone concentration increase gradient, and if it falls below the set value, the operation of the ozone gas sterilizer is automatically stopped and an alarm is issued, so that the processing is completed with an insufficient sterilization effect. Can be prevented.

  Next, embodiments of the invention will be described.

FIG. 1 is a schematic configuration diagram of an ozone gas sterilizer showing a configuration example 1 of the present invention.

Figure 2 is a schematic diagram of an ozone gas disinfection apparatus according to the configuration example 2 of the present invention.

FIG. 3 is a schematic configuration diagram of an ozone gas sterilizer showing Embodiment 1 and Embodiment 2 of the present invention.

First, the whole structure of the ozone gas sterilizer which is the structural example 1 of this invention is demonstrated with reference to FIG.

  As shown in FIG. 1, the sterilization chamber 1 is an ozone gas storage body, and the sterilization chamber 1 is provided with an opening / closing door 2 that is used when an object to be sterilized is installed and taken out.

  The ozone gas generator 3 is communicated with the sterilizer 1 via a pipe or the like via an electromagnetic switching valve 20.

  The exhaust device 7 is communicated with the sterilizer 1 and the exhaust port 10 through a check valve 8, an exhaust gas detoxification device 9, and an electromagnetic switching valve 18, respectively, via piping and the like.

  Examples of the exhaust device 7 include a vacuum pump.

  The ozone detector 4 is installed in the sterilizer 1.

  Instead of the ozone detector 4, an ozone gas concentration meter may be installed outside the sterilizer 1 and communicated with the sterilizer 1 via a pipe or the like.

  The electromagnetic switching valves 18 and 20, the ozone gas generator 3, the ozone detector 4, the exhaust device 7, the exhaust gas detoxification device 9, the operation means 13, the output means 14, and the display means 15 are connected to the control unit 6. Examples of the output unit 14 include a printer.

  The control unit 6 includes a central processing unit (CPU), a storage device (RAM and ROM), an interface, and the like, and a control program and a calculation program described later are stored in the ROM.

  Next, the operation of the above configuration will be described.

First, the object to be sterilized is stored in the sterilizer 1, the door 2 is closed, and the sterilizer 1 is sealed. When the operation means 13 such as a switch is turned on, it is displayed on the display means 15 that sterilization is in progress, and the control unit 6 performs the next control. That is, the exhaust electromagnetic switching valve 18 is opened, the exhaust device 7 is operated, and the atmospheric gas in the sterilizer 1 is exhausted. And ozone gas is produced | generated by ozone gas mechanisms, such as silent discharge, in the ozone gas generator 3, and it sends into the sterilizer 1 through the electromagnetic switching valve 20, and the sterilizer 1 is filled with ozone gas, and is to be treated. Is sterilized. The ozone gas injection amount, the injection time, the number of injection repetitions, etc. from the ozone gas generator 3 in the injection process are set according to the size of the sterilizer and the required effects. If an ozone concentration other than the set value is detected by the ozone detector 4 during the sterilization process, the ozone gas injection amount, the injection time, the number of injection repetitions, and the like are manipulated so that the set value is obtained. The sterilized residual ozone gas is detoxified by the exhaust device 7 via the electromagnetic switching valve 18, the exhaust gas detoxification device 9, and the check valve 8, and then exhausted. The ozone gas exhaust process and display its effect on the display means 15 ends, the sterilization chamber door 2 is opened to take out the sterilized object. The ozone concentration in the sterilizer 1 in all steps from the ozone gas injection step to the ozone gas discharge step is detected by the ozone detector 4 and output from the output means 14.

Thus, the sterilization box for accommodating the article to be sterilized object inside, a mechanism for supplying ozone gas into the sterilization chamber, a mechanism for infiltrating ozone gas to be sterilized object gas is difficult to permeate into the In an ozone gas sterilizer using ozone gas having a mechanism, a mechanism for detecting the ozone concentration in the sterilization chamber, a mechanism for controlling the ozone concentration based on the detection result, and a control status output means for outputting the control status By providing, the ozone concentration in the sterilization chamber during the sterilization treatment process can be controlled to the set value, and the ozone concentration in the sterilization chamber was controlled to the set value by outputting the ozone concentration from the output means. So that the sterilization can be performed efficiently and reliably.

Further, when the mechanism for controlling the ozone concentration of the ozone gas sterilizer controls the ozone concentration in the sterilizer 1, the amount of gas generated from the ozone gas generator 3 is made constant and only the injection time is set as the operation target. Therefore, it can be controlled with a simple configuration.

Next, Configuration Example 2 will be described with reference to FIG. The overall configuration of the ozone gas sterilizer shown in Configuration Example 2 is obtained by adding some devices and piping to the overall configuration shown in Configuration Example 1 , and includes a differential pressure detector 5, a first pressure detector 21, Two pressure detectors 22, a supply unit 11, an exhaust unit 12, and HEPA filters (air filters) 16 and 17 are provided. The differential pressure detector 5 is connected to a first pressure detector 21 installed in the sterilizer 1 and a second pressure detector 22 installed outside the refrigerator. The supply unit 11 is communicated with the sterilizer 1 through a HEPA filter 16 via piping or the like. The exhaust unit 12 is communicated with the sterilizer 1 via a HEPA filter 17 via a pipe or the like. The differential pressure detector 5, the supply unit 11, and the exhaust unit 12 are connected to the control unit 6.

First, similarly to the configuration example 1 , the object to be sterilized is stored in the sterilizer 1, the door 2 is closed, and the sterilizer 1 is sealed. When the operation means 13 such as a switch is turned on, it is displayed on the display means 15 that sterilization is in progress, and the ozone gas injection process is performed. The differential pressure detector 5 detects the differential pressure between the pressure in the sterilizer 1 and the atmospheric pressure. That is, the signal of the first pressure detector 21 and the signal of the second pressure detector are respectively input to the differential pressure detector 5, and the differential pressure detector 5 generates a differential pressure between the inside of the sterilizer 1 and the atmospheric pressure. Desired. And the pressure in the sterilizer 1 is controlled by the control unit 6 so that the differential pressure becomes a set value. That is, in the case where the differential pressure is set so that the pressure in the sterilizer 1 becomes a positive pressure (a pressure higher than the atmospheric pressure), when the negative pressure is detected, the air supply unit 11 is activated. The atmosphere gas outside the chamber is supplied into the sterilization chamber 1. In the case where the differential pressure is set so that the pressure in the sterilizer 1 becomes a negative pressure (pressure lower than the atmospheric pressure), when the positive pressure is detected, the exhaust unit 12 is activated and the sterilizer is operated. The atmospheric gas in 1 is exhausted. When the differential pressure is set so as to change the pressure in the sterilizer 1 from the positive pressure to the negative pressure, the air supply process and the exhaust process are appropriately performed. The sterilized residual ozone gas is detoxified by the exhaust device 7 via the electromagnetic switching valve 18, the exhaust gas detoxification device 9, and the check valve 8, and then exhausted. The ozone gas exhaust process and display its effect on the display means 15 ends, the sterilization chamber door 2 is opened to take out the sterilized object. The differential pressure between the pressure in the sterilizer 1 and the atmospheric pressure in all processes from the ozone gas injection process to the ozone gas discharge process is detected by the differential pressure detector 5 and output from the output means 14.

Thus, in the ozone gas sterilization apparatus using ozone gas, by providing a mechanism for supplying atmospheric gas outside the sterilization chamber into the sterilization chamber and a mechanism for exhausting the atmospheric gas inside the sterilization chamber to the outside of the sterilization chamber, Since the atmospheric gas outside the sterilization chamber can be introduced into the sterilization chamber together with the ozone gas, the amount of the introduced gas can be increased, and the rise time of the ozone concentration can be shortened to perform the sterilization efficiently.

In the ozone gas sterilizer , a mechanism for detecting a differential pressure between the inside and outside of the sterilizer, a mechanism for controlling the pressure in the sterilizer based on the detection result, and a control status for outputting the control status By providing the output means, the differential pressure between the pressure in the sterilization chamber and the atmospheric pressure during the sterilization process can be controlled to a set value, and the differential pressure is output from the output means to It can be assured that the pressure is controlled to the set value, and the sterilization operation can be performed reliably.

In the ozone gas sterilizer , when the differential pressure is set so that the pressure in the sterilization chamber becomes positive, the atmospheric gas outside the sterilization chamber may contain harmful microorganisms such as bacteria and bacteria during the sterilization treatment. Can be prevented from entering the sterilization chamber, and the differential pressure between the sterilization chamber and the outside of the sterilization chamber is output from the output means. It is possible to ensure that the atmosphere inside the sterilization chamber is kept clean without the intrusion of atmospheric gas outside the chamber.

Further, in the ozone gas sterilizer , when the differential pressure is set so that the pressure in the sterilization chamber becomes negative, the sterilization chamber is contaminated when the object to be sterilized installed in the sterilization chamber is contaminated. By maintaining the negative pressure, it is possible to prevent the atmospheric gas that may have been contaminated in the sterilization chamber from being exhausted to the outside, and the differential pressure between the sterilization chamber and the outside of the sterilization chamber is output means. As a result, it is possible to maintain the negative pressure inside the sterilizer and to ensure that the atmospheric gas inside the contaminated sterilizer does not leak out of the sterilizer. It can be ensured that there is no sterilization, and sterilization can be performed safely.

In the ozone gas sterilization apparatus , when setting the differential pressure so that the pressure in the sterilization chamber is changed from negative pressure to positive pressure, the pressure in the sterilization chamber is changed during the sterilization processing, In addition, ozone gas can be permeated to every corner, and environmental conditions can be changed for bacteria attached to the object to be sterilized, thereby improving the sterilizing effect. Moreover, since the differential pressure between the inside of the sterilization chamber and the outside of the sterilization chamber is output from the output means, it can be ensured that the differential pressure is maintained at the set value.

In the ozone gas sterilizer , the HEPA filter is installed in the gas passage of the mechanism (supply unit 11) for supplying the atmospheric gas outside the sterilizer into the sterilizer, so that the object to be sterilized installed in the sterilizer is installed. Even when it is necessary to supply air to the sterilization chamber, such as when the pressure in the sterilization chamber becomes too low, fine particles or harmful microorganisms in the atmosphere enter the chamber. Can be prevented. Further, when the HEPA filter is installed in the gas passage of the mechanism (exhaust unit 12) for exhausting the atmospheric gas in the sterilization chamber to the outside, the sterilization chamber may be contaminated. Even when it is necessary to exhaust the atmospheric gas in the storage outside the storage, such as when the internal pressure is too high, the contaminated air in the storage can be filtered and exhausted outside the storage.

Next, Example 1 will be described with reference to FIG. The overall configuration of the ozone gas sterilization apparatus shown in the first embodiment is obtained by adding some devices and piping to the entire configuration shown in the configuration example 2 , and includes a recording unit 19 and an alarm device 23. The recording means 19 and the alarm device 23 are connected to the control unit 6.

First, similarly to the configuration example 1 , the object to be sterilized is stored in the sterilizer 1, the door 2 is closed, and the sterilizer 1 is sealed. When the operation means 13 such as a switch is turned on, it is displayed on the display means 15 that sterilization is in progress, and the ozone gas injection process is performed. Then, the sterilization chamber 1 is filled with ozone gas, and the object to be sterilized is sterilized. The ozone gas injection amount, the injection time, the number of injection repetitions, etc. in the injection process are set according to the size of the sterilizer and the required effects. After completion of the sterilization process, the product of the ozone concentration in the sterilization chamber 1 subjected to the sterilization process detected by the ozone detector 4 and the time taken for the sterilization process is stored in the program stored in the ROM of the control unit 16. Is calculated. The calculation result is displayed on the display unit 15 as a sterilization effect index value and also recorded on the recording unit 19. Then, the sterilization effect index value is compared with a preliminarily set sterilization effect index value. When the sterilization effect index value is below the set value, the ozone sterilization operation is started. When the set value is exceeded, the process proceeds to the ozone gas exhaust process.

Thus, in the ozone gas sterilizer , the calculation means for calculating the product of the ozone concentration in the sterilization chamber that has been sterilized and the time taken for the sterilization process, and the calculation result are displayed as the sterilization effect index value. By providing display means and recording means for recording, it is usually necessary to culture bacteria for several days, so the bactericidal effect that cannot be confirmed directly online is calculated in the form of the product of ozone concentration and treatment time, It can be displayed and recorded, sterilization can be guaranteed online, and sterilization can be performed reliably.

Further, in the ozone gas sterilizer , when the calculated sterilization effect index value does not reach a preset sterilization effect index value, the sterilization process is completed by restarting the sterilization process with an insufficient sterilization effect. This can be prevented, and a desired sterilizing effect can be secured.

Next, Example 2 will be described with reference to FIG. First, similarly to the configuration example 1, the object to be sterilized is stored in the sterilizer 1, the door 2 is closed, and the sterilizer 1 is sealed. When the operation means 13 such as a switch is turned on, it is displayed on the display means 15 that sterilization is in progress, and the ozone gas injection process is performed. Then, an increase in ozone concentration (ozone concentration increase gradient) in the sterilizer 1 within a predetermined time from the start of the sterilization process is calculated by a program stored in the ROM of the control unit 16. When the ozone concentration increase gradient falls below a preset gradient within a predetermined time, an alarm is issued from the alarm device 23, the sterilization process is terminated, and the process proceeds to the ozone gas discharge process.

As described above, the ozone gas sterilizer includes a calculation unit that calculates an ozone concentration increase gradient and an output unit that outputs an alarm signal to the alarm device, and the ozone concentration increase gradient becomes equal to or less than a set value within a predetermined time. When the operation of the ozone gas sterilizer is automatically stopped and an alarm is issued, it is possible to prevent the sterilization process from being completed with an insufficient sterilization effect. This is focused on the difference in the ozone concentration increase gradient depending on the object to be sterilized. Compare the set gradient with the measured gradient, and if it falls below the set value, the sterilizer capacity exceeds the processing capacity. Therefore, the above measures are taken.

The gas used as the sterilizing gas in Configuration Example 1 to Example 2 is limited to ozone gas.

As described above, the sterilization box for accommodating the article to be sterilized object inside, a mechanism for supplying ozone gas into the sterilization chamber, a mechanism for infiltrating ozone gas to be sterilized object gas is difficult to permeate into the In an ozone gas sterilizer using ozone gas having a mechanism, a mechanism for detecting the ozone concentration in the sterilization chamber, a mechanism for controlling the ozone concentration based on the detection result, and a control status output means for outputting the control status By providing, the ozone concentration in the sterilization chamber during the sterilization treatment process can be controlled to the set value, and the ozone concentration in the sterilization chamber was controlled to the set value by outputting the ozone concentration from the output means. So that the sterilization can be performed efficiently and reliably.

Further, when the mechanism for controlling the ozone concentration of the ozone gas sterilizer controls the ozone concentration in the sterilizer 1, the amount of gas generated from the ozone gas generator 3 is made constant and only the injection time is set as the operation target. Therefore, it can be controlled with a simple configuration.

Further, in the ozone gas sterilizer using ozone gas, a sterilizer is provided by providing a mechanism for supplying atmospheric gas outside the sterilizer into the sterilizer and a mechanism for exhausting atmospheric gas inside the sterilizer outside the sterilizer. Since the atmospheric gas outside the sterilization chamber can be introduced into the inside together with the ozone gas, the amount of the introduced gas can be increased, and the rise time of the ozone concentration can be shortened to efficiently perform sterilization.

In the ozone gas sterilizer , a mechanism for detecting a differential pressure between the inside and outside of the sterilizer, a mechanism for controlling the pressure in the sterilizer based on the detection result, and a control status for outputting the control status By providing the output means, the differential pressure between the pressure in the sterilization chamber and the atmospheric pressure during the sterilization process can be controlled to a set value, and the differential pressure is output from the output means to It can be assured that the pressure is controlled to the set value, and the sterilization operation can be performed reliably.

Further, the Oite the ozone sterilizer, the pressure in the sterilization chamber may set the differential pressure to be a positive pressure, sterilization chamber outside of which may be present harmful microorganisms such as fungi and bacteria during sterilization Atmospheric gas can be prevented from entering the sterilization chamber, and the differential pressure between the sterilization chamber and the outside of the sterilization chamber is output from the output means, so the pressure inside the sterilization chamber was maintained at a positive pressure. Moreover, there is no intrusion of atmospheric gas outside the sterilization chamber, and it can be ensured that the cleanliness inside the sterilization chamber is maintained.

Further, in the ozone gas sterilizer , when the differential pressure is set so that the pressure in the sterilization chamber becomes negative, the sterilization chamber is contaminated when the object to be sterilized installed in the sterilization chamber is contaminated. By maintaining the negative pressure, it is possible to prevent the atmospheric gas that may have been contaminated in the sterilization chamber from being exhausted to the outside, and the differential pressure between the sterilization chamber and the outside of the sterilization chamber is output means. As a result, it is possible to maintain the negative pressure inside the sterilizer and to ensure that the atmospheric gas inside the contaminated sterilizer does not leak out of the sterilizer. It can be ensured that there is no sterilization, and sterilization can be performed safely.

In the ozone gas sterilization apparatus , when setting the differential pressure so that the pressure in the sterilization chamber is changed from negative pressure to positive pressure, the pressure in the sterilization chamber is changed during the sterilization processing, In addition, ozone gas can be permeated to every corner, and environmental conditions can be changed for bacteria attached to the object to be sterilized, thereby improving the sterilizing effect. Moreover, since the differential pressure between the inside of the sterilization chamber and the outside of the sterilization chamber is output from the output means, it can be ensured that the differential pressure is maintained at the set value.

In the ozone gas sterilizer , an air filter such as a HEPA filter is installed in the gas passage of the mechanism (supply unit 11) for supplying atmospheric gas outside the sterilizer into the sterilizer. When sterilizing an object to be sterilized, when the pressure in the sterilization chamber becomes too low, etc., even if it is necessary to supply air to the chamber, fine particles present in the chamber or harmful It is possible to prevent infiltration of microorganisms and the like. In addition, when an air filter such as a HEPA filter is installed in the gas passage of the mechanism (exhaust unit 12) for exhausting the atmospheric gas in the sterilization chamber to the outside, the sterilization chamber may be contaminated. In the case where it is necessary to exhaust the atmospheric gas in the storage outside the storage, such as when the pressure in the sterilization storage is too high, the contaminated air in the storage can be filtered and exhausted outside the storage. it can.

In addition, in the ozone gas sterilizer using ozone gas, a calculation means for calculating the product of the ozone concentration in the sterilization chamber where the sterilization process is performed and the time taken for the sterilization process, and the calculation result are displayed as a sterilization effect indicator. By providing display means for recording and recording means for recording, it is usually necessary to culture bacteria for several days, so the bactericidal effect that cannot be confirmed directly online is calculated in the form of the product of ozone concentration and treatment time Can be displayed, recorded, sterilization can be guaranteed online, and sterilization can be performed reliably.

Further, in the ozone gas sterilizer , when the calculated sterilization effect index value does not reach a preset sterilization effect index value, the sterilization process is completed by restarting the sterilization process with an insufficient sterilization effect. This can be prevented, and a desired sterilizing effect can be secured.

In addition, the ozone gas sterilizer using ozone gas comprises a calculating means for calculating the ozone concentration increase gradient in the sterilization chamber and an output means for outputting an alarm signal to the alarm device, and the ozone concentration increase gradient is set within a predetermined time. When the ozone gas sterilization apparatus is not more than the value, the operation of the ozone gas sterilizer is automatically stopped and an alarm can be given to prevent the sterilization process from being completed with an insufficient sterilization effect.

The schematic block diagram of the ozone gas sterilizer which shows the structural example 1 of this invention. The schematic block diagram of the ozone gas sterilizer which shows the structural example 2 of this invention. The schematic block diagram of the ozone gas sterilizer which shows Example 1 and Example 2 of this invention.

DESCRIPTION OF SYMBOLS 1 Sterilizer 2 Sterilizer door 3 Ozone gas generator 4 Ozone detector 5 Differential pressure detector 6 Control unit 11 Supply unit 12 Exhaust unit 14 Output means 15 Display means 16 HEPA filter 17 HEPA filter 19 Recording means 23 Alarm device

Claims (1)

In an ozone gas sterilizer having a sterilizer (1) for storing an object to be sterilized therein and a mechanism for supplying ozone gas into the sterilizer (1), the ozone concentration in the sterilizer (1) is detected. An ozone detector (4), a control unit (6) for controlling the ozone concentration based on the detection result of the ozone detector (4), and a control status output means (14) for outputting the control status provided, the sterilizing chamber (1) out of the ambient gas sterilization box (1) supply to be supplied to the unit (11), an exhaust unit (12 for exhausting the atmospheric gas within the sterilization chamber (1) out of the sterilization chamber ) and, the sterilizing chamber (1) in the sterilization chamber (1) differential pressure detection device for detecting the differential pressure between the outside (5) and the provided the based on the detection result of the difference pressure detecting device (5) The pressure in the sterilizer (1) is controlled by the control unit (6). The control status is displayed by the control status output means (14), and the supply unit (11) and the exhaust unit (12) are operated to sterilize the pressure in the sterilizer (1). A mechanism capable of changing to negative pressure and positive pressure with respect to the pressure outside the chamber (1) is provided, and the product of the ozone concentration in the sterilization chamber (1) subjected to the sterilization treatment and the time taken for the sterilization treatment Calculation means, a control status output means (14) for displaying the calculation result as a sterilization effect index value, and a recording means (19) for recording, wherein the sterilization effect index value calculated by the calculation means is If the preset sterilization effect index value is not reached, the sterilization process is resumed, and the ozone concentration increase gradient, which is an increase in ozone concentration in the sterilizer (1) within a predetermined time from the start of the sterilization process. Calculating means for calculating Output means for outputting an alarm signal to the alarm device (23), and automatically stops the operation of the ozone gas sterilizer when the ozone concentration increase gradient becomes a set value or less within the predetermined time, and the alarm An ozone gas sterilizer characterized by an alarm by the device (23).

Images