JP2002119579A - Sterilization evaluation method in steam sterilizer - Google Patents
Sterilization evaluation method in steam sterilizerInfo
- Publication number
- JP2002119579A JP2002119579A JP2000316103A JP2000316103A JP2002119579A JP 2002119579 A JP2002119579 A JP 2002119579A JP 2000316103 A JP2000316103 A JP 2000316103A JP 2000316103 A JP2000316103 A JP 2000316103A JP 2002119579 A JP2002119579 A JP 2002119579A
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- Prior art keywords
- sterilization
- temperature
- abnormality
- judging
- tank
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、蒸気滅菌装置に
おける滅菌異常を判定するための滅菌判定方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sterilization judging method for judging a sterilization abnormality in a steam sterilizer.
【０００２】[0002]
【従来の技術】蒸気滅菌装置においては、滅菌用蒸気を
滅菌槽内へ供給して、滅菌用蒸気の保有する熱により被
滅菌物の滅菌処理を行うようにしている。この滅菌用蒸
気の供給は、前記滅菌槽内の温度が所定の滅菌温度とな
るように制御される。2. Description of the Related Art In a steam sterilizer, steam for sterilization is supplied into a sterilization tank, and the object to be sterilized is sterilized by the heat of the steam for sterilization. The supply of the steam for sterilization is controlled so that the temperature in the sterilization tank becomes a predetermined sterilization temperature.
【０００３】ところで、滅菌用蒸気の供給をＰＩＤ制御
（比例積分微分制御）により制御しているものにおいて
は、滅菌用蒸気の供給開始時、前記滅菌槽内の温度が小
刻みに上下動しながら上昇する。したがって、場合によ
っては、前記滅菌槽内の温度が一旦滅菌温度を超えた
後、直ちに滅菌温度を少しだけ下回り、再度滅菌温度を
超える現象が発生することがある。そうすると、滅菌温
度を下回ったということで滅菌異常の警報が発せられ、
滅菌処理が停止するが、実際に滅菌異常が発生している
わけではなく、いわゆる誤判定となっている。In the case where the supply of sterilizing steam is controlled by PID control (proportional-integral-differential control), the temperature in the sterilizing tank rises while moving up and down little by little when the supply of sterilizing steam is started. I do. Therefore, depending on the case, after the temperature in the sterilization tank once exceeds the sterilization temperature, a phenomenon that the temperature falls slightly below the sterilization temperature and then exceeds the sterilization temperature again may occur. Then, a warning of sterilization abnormality will be issued because the temperature has dropped below the sterilization temperature,
Although the sterilization process is stopped, a sterilization abnormality does not actually occur, and a so-called erroneous determination is made.
【０００４】また、滅菌時間の積算に際し、前記滅菌槽
内の温度が滅菌温度を超えている時間を積算し、積算し
た滅菌時間が設定値に達したら滅菌処理を終了するよう
にしたものがある。この構成においては、前記滅菌槽内
の温度が滅菌温度を下回っているときは、滅菌時間の積
算を停止しているが、蒸気供給手段の不調等により、前
記滅菌槽内の温度が滅菌温度を下回っている状態が長時
間続く場合は、前記蒸気滅菌装置の運転時間全体が非常
に長くなったり、いつまで経っても滅菌処理が終了しな
くなることがある。In addition, when integrating the sterilization time, there is a method in which the time during which the temperature in the sterilization bath exceeds the sterilization temperature is integrated, and the sterilization process is terminated when the integrated sterilization time reaches a set value. . In this configuration, when the temperature in the sterilization tank is lower than the sterilization temperature, the integration of the sterilization time is stopped, but the temperature in the sterilization tank is reduced to the sterilization temperature due to malfunction of the steam supply means or the like. If the lowering time continues for a long time, the entire operation time of the steam sterilizer may become extremely long, or the sterilization process may not be completed forever.
【０００５】[0005]
【発明が解決しようとする課題】この発明が解決しよう
とする課題は、蒸気滅菌装置において、滅菌異常の誤判
定を防止するとともに滅菌異常を確実に検出することで
ある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a steam sterilizer which prevents erroneous determination of sterilization abnormality and reliably detects sterilization abnormality.
【０００６】[0006]
【課題を解決するための手段】この発明は、前記課題を
解決するためになされたもので、請求項１に記載の発明
は、蒸気滅菌装置における滅菌異常を判定するための滅
菌判定方法であって、滅菌槽内の温度が滅菌温度に達し
た後に複数回滅菌温度を下回った場合に滅菌異常と判定
することを特徴としている。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 is a sterilization judging method for judging a sterilization abnormality in a steam sterilizer. When the temperature in the sterilization tank falls below the sterilization temperature a plurality of times after reaching the sterilization temperature, it is determined that sterilization is abnormal.
【０００７】請求項２に記載の発明は、蒸気滅菌装置に
おける滅菌異常を判定するための滅菌判定方法であっ
て、滅菌槽内の温度が滅菌温度に達した後に滅菌温度を
下回り、滅菌温度を下回った状態が所定時間以上続いた
場合に滅菌異常と判定することを特徴としている。According to a second aspect of the present invention, there is provided a sterilization judging method for judging a sterilization abnormality in a steam sterilizer, wherein the temperature in the sterilization tank falls below the sterilization temperature after reaching the sterilization temperature. It is characterized in that sterilization is determined to be abnormal when the state of lowering continues for a predetermined time or more.
【０００８】請求項３に記載の発明は、蒸気滅菌装置に
おける滅菌異常を判定するための滅菌判定方法であっ
て、滅菌槽内の温度が滅菌温度に達した後にこの滅菌温
度より低い設定温度を下回った場合に滅菌異常と判定す
ることを特徴としている。According to a third aspect of the present invention, there is provided a sterilization judging method for judging a sterilization abnormality in a steam sterilizer, wherein a set temperature lower than the sterilization temperature is set after the temperature in the sterilization tank reaches the sterilization temperature. It is characterized in that when it falls below, it is determined that sterilization is abnormal.
【０００９】請求項４に記載の発明は、蒸気滅菌装置に
おける滅菌異常を判定するための滅菌判定方法であっ
て、滅菌異常を判定する判定条件を複数個設定し、設定
した判定条件のうち少なくとも１つに該当した場合、滅
菌異常と判定することを特徴としている。According to a fourth aspect of the present invention, there is provided a sterilization determining method for determining a sterilization abnormality in a steam sterilizer, wherein a plurality of determination conditions for determining a sterilization abnormality are set, and at least one of the set determination conditions is set. When one of the conditions is satisfied, it is determined that the sterilization is abnormal.
【００１０】さらに、請求項５に記載の発明は、前記判
定条件の設定個数が、滅菌槽内の温度が滅菌温度に達し
た後に複数回滅菌温度を下回った場合に滅菌異常と判定
する第一判定条件と、前記滅菌槽内の温度が滅菌温度に
達した後に滅菌温度を下回り、滅菌温度を下回った状態
が所定時間以上続いた場合に滅菌異常と判定する第二判
定条件と、前記滅菌槽内の温度が滅菌温度に達した後に
この滅菌温度より低い設定温度を下回った場合に滅菌異
常と判定する第三判定条件のうち少なくとも２つである
ことを特徴としている。[0010] Further, the invention according to claim 5 is characterized in that when the set number of the judgment conditions falls below the sterilization temperature a plurality of times after the temperature in the sterilization tank has reached the sterilization temperature, it is judged that the sterilization is abnormal. A determination condition, a second determination condition for determining that the sterilization is abnormal when the temperature in the sterilization tank falls below the sterilization temperature after reaching the sterilization temperature and the state of falling below the sterilization temperature continues for a predetermined time or more, and the sterilization tank It is characterized in that at least two of the third judgment conditions for judging that sterilization is abnormal when the temperature in the inside falls below a set temperature lower than the sterilization temperature after reaching the sterilization temperature.
【００１１】[0011]
【発明の実施の形態】つぎに、この発明の実施の形態に
ついて説明する。この発明を適用する蒸気滅菌装置は、
被滅菌物を収容する滅菌槽を備えており、この滅菌槽
は、扉を開閉することにより密閉可能な構成になってい
る。そして、前記滅菌槽への滅菌用蒸気の供給は、前記
滅菌槽内の温度に基づいて制御されるようになってい
る。すなわち、前記滅菌槽に接続された蒸気供給弁を開
閉制御することにより、前記滅菌槽内の温度が予め設定
された所定の滅菌温度に維持されるようになっている。Next, an embodiment of the present invention will be described. The steam sterilizer to which the present invention is applied
It has a sterilization tank for accommodating an object to be sterilized, and the sterilization tank has a configuration that can be closed by opening and closing a door. The supply of sterilizing steam to the sterilization tank is controlled based on the temperature in the sterilization tank. That is, by controlling the opening and closing of the steam supply valve connected to the sterilization tank, the temperature in the sterilization tank is maintained at a predetermined sterilization temperature.
【００１２】また、前記蒸気滅菌装置においては、滅菌
異常を判定するための判定条件として、つぎの３つの判
定条件のうちから１つまたは複数選択して設定されてい
る。In the steam sterilizer, one or more of the following three determination conditions are selected and set as determination conditions for determining a sterilization abnormality.
【００１３】まず、第一判定条件について説明すると、
この第一判定条件は、前記滅菌槽内の温度が滅菌温度に
達した後に複数回（たとえば、３回）滅菌温度を下回っ
た場合に滅菌異常と判定するようになっている。すなわ
ち、この第一判定条件においては、前記滅菌槽内の温度
が１回だけ滅菌温度を下回ったときは、直ちに滅菌異常
とは判定せず、そのまま滅菌処理を継続し、複数回下回
ったとき滅菌異常と判定するようにしている。したがっ
て、従来の技術の欄で説明したような誤判定を防止し
て、滅菌処理が途中で不必要に停止するのを防止するこ
とができる。First, the first determination condition will be described.
The first determination condition is such that if the temperature in the sterilization tank falls below the sterilization temperature a plurality of times (for example, three times) after reaching the sterilization temperature, it is determined that the sterilization is abnormal. In other words, in the first determination condition, when the temperature in the sterilization tank is lower than the sterilization temperature only once, the sterilization is not immediately determined to be abnormal, and the sterilization process is continued as it is. It is determined to be abnormal. Therefore, it is possible to prevent erroneous determination as described in the section of the related art, and to prevent unnecessary stoppage of the sterilization process.
【００１４】つぎに、第二判定条件について説明する
と、この第二判定条件は、前記滅菌槽内の温度が滅菌温
度に達した後に滅菌温度を下回り、前記滅菌槽内の温度
が滅菌温度を下回った状態が所定時間（たとえば、２０
秒）以上続いた場合に滅菌異常と判定するようになって
いる。したがって、この第二判定条件によれば、前記滅
菌槽内の温度が滅菌温度を下回る状態が長時間続いたと
きは、滅菌異常と判定し、従来の技術の欄で説明したよ
うに、前記蒸気滅菌装置の運転時間が不必要に延びるの
を防止することができる。Next, the second judgment condition will be described. The second judgment condition is that the temperature in the sterilization tank falls below the sterilization temperature after reaching the sterilization temperature, and the temperature in the sterilization tank falls below the sterilization temperature. State for a predetermined time (for example, 20
If it lasts for more than 2 seconds), it is determined that sterilization is abnormal. Therefore, according to the second determination condition, when the temperature in the sterilization tank is lower than the sterilization temperature for a long time, it is determined that the sterilization is abnormal, and as described in the related art section, the steam is determined. Unnecessarily extending the operation time of the sterilizer can be prevented.
【００１５】さらに、第三判定条件について説明する
と、この第三判定条件は、前記滅菌槽内の温度が滅菌温
度に達した後に、この滅菌温度より低い設定温度（たと
えば、滅菌温度−１０℃）を下回った場合に滅菌異常と
判定するようになっている。すなわち、この第三判定条
件においては、前記滅菌槽内の温度が少しだけ滅菌温度
を下回ったときは、直ちに滅菌異常とは判定せず、その
まま滅菌処理を継続し、さらに温度が低下して前記設定
温度を下回ったとき滅菌異常と判定するようにしてい
る。したがって、従来の技術の欄で説明したような誤判
定を防止して、滅菌処理が途中で不必要に停止するのを
防止することができる。The third determination condition will be described. The third determination condition is that after the temperature in the sterilization tank reaches the sterilization temperature, a set temperature lower than the sterilization temperature (for example, a sterilization temperature of -10 ° C.). If the value is less than, the sterilization abnormality is determined. That is, in the third determination condition, when the temperature in the sterilization tank slightly drops below the sterilization temperature, it is not immediately determined that the sterilization is abnormal, and the sterilization process is continued as it is, and the temperature further decreases and the sterilization is continued. When the temperature falls below the set temperature, it is determined that sterilization is abnormal. Therefore, it is possible to prevent erroneous determination as described in the section of the related art, and to prevent unnecessary stoppage of the sterilization process.
【００１６】これらの３つの判定条件は、それぞれ単独
で設定することもできるが、実施に応じては、３つの判
定条件のうちから複数，すなわち少なくとも２つが選択
して設定される。そして、設定した複数の判定条件のう
ち少なくとも１つに該当した場合、滅菌異常と判定す
る。すなわち、色々な滅菌異常を想定して少なくとも２
つの判定条件を設定し、いずれか１つに該当した場合に
滅菌異常と判定することにより、より確実に滅菌異常を
検出することができるようになっている。また、判定条
件を３つ設定すると、確実性がさらに向上する。ところ
で、複数の判定条件を設定する際、前記３つの判定条件
以外の判定条件を設定することもできる。These three determination conditions can be individually set, but depending on the implementation, a plurality, ie, at least two, of the three determination conditions are selected and set. Then, if at least one of the set plural determination conditions is satisfied, it is determined that the sterilization is abnormal. In other words, at least 2
By setting one of the determination conditions and determining that one of the conditions is met, it is possible to more reliably detect the sterilization abnormality. Further, when three determination conditions are set, the reliability is further improved. By the way, when setting a plurality of judgment conditions, judgment conditions other than the above three judgment conditions can be set.
【００１７】以上のように、前記構成によれば、前記蒸
気滅菌装置において、滅菌異常の誤判定を防止すること
ができるとともに、滅菌異常を確実に検出することがで
きる。As described above, according to the above configuration, in the steam sterilizer, erroneous determination of sterilization abnormality can be prevented, and the sterilization abnormality can be reliably detected.
【００１８】[0018]
【実施例】以下、この発明の具体的実施例を図面に基づ
いて詳細に説明する。図１は、この発明を適用する蒸気
滅菌装置の概略構成を示す説明図である。図１におい
て、前記蒸気滅菌装置は、滅菌槽１を備え、この滅菌槽
１の前面の開口部２を密閉するように扉３が設けられて
いる。そして、前記開口部２の周囲には、パッキン４が
設けられている。また、前記滅菌槽１の外壁には、蒸気
ジャケットあるいは加熱管が設けられ（図示省略）、前
記滅菌槽１を外側から加熱するようになっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory diagram showing a schematic configuration of a steam sterilizer to which the present invention is applied. In FIG. 1, the steam sterilizer has a sterilization tank 1, and a door 3 is provided so as to seal an opening 2 on the front surface of the sterilization tank 1. A packing 4 is provided around the opening 2. A steam jacket or a heating tube is provided on the outer wall of the sterilization tank 1 (not shown) so that the sterilization tank 1 is heated from the outside.
【００１９】つぎに、前記滅菌槽１に接続されている配
管構成について説明する。まず、前記滅菌槽１には、蒸
気供給ライン５が接続され、前記滅菌槽１内へ滅菌用蒸
気が供給されるようになっている。前記蒸気供給ライン
５には、蒸気供給弁６が設けられている。Next, the configuration of the piping connected to the sterilization tank 1 will be described. First, a steam supply line 5 is connected to the sterilization tank 1 so that steam for sterilization is supplied into the sterilization tank 1. The steam supply line 5 is provided with a steam supply valve 6.
【００２０】また、前記滅菌槽１には空気供給ライン７
が接続されており、減圧された前記滅菌槽１内へ無菌空
気が供給されて、前記滅菌槽１内が大気圧まで復圧され
るようになっている。前記空気供給ライン７には、無菌
フィルタ８，空気供給弁９および第一逆止弁１０が、上
流側から順に設けられている。The sterilization tank 1 has an air supply line 7.
Is connected, and aseptic air is supplied into the decompressed sterilization tank 1 so that the pressure in the sterilization tank 1 is restored to the atmospheric pressure. The air supply line 7 is provided with a sterile filter 8, an air supply valve 9, and a first check valve 10 in order from the upstream side.
【００２１】また、前記滅菌槽１には真空引きライン１
１が接続されており、前記滅菌槽１内が減圧されるよう
になっている。前記真空引きライン１１には、第一排気
弁１２，第二逆止弁１３，真空ポンプ１４および第三逆
止弁１５が、上流側から順に設けられている。The sterilization tank 1 has a vacuum line 1
1 is connected so that the pressure inside the sterilization tank 1 is reduced. The evacuation line 11 is provided with a first exhaust valve 12, a second check valve 13, a vacuum pump 14, and a third check valve 15 in order from the upstream side.
【００２２】また、排気ライン１６が、前記真空引きラ
イン１１における前記第一排気弁１２の上流側から分岐
して設けられ、その下流端が前記真空引きライン１１に
おける前記第三逆止弁１５の下流側に接続されている。
前記排気ライン１６は、前記滅菌槽１内の蒸気を外部へ
排出する作用をなす。前記排気ライン１６には、第二排
気弁１７および第四逆止弁１８が、上流側から順に設け
られている。An evacuation line 16 is provided in the evacuation line 11 so as to be branched from an upstream side of the first evacuation valve 12, and a downstream end of the evacuation line 16 is connected to the third check valve 15 in the evacuation line 11. It is connected to the downstream side.
The exhaust line 16 functions to discharge the steam in the sterilization tank 1 to the outside. The exhaust line 16 is provided with a second exhaust valve 17 and a fourth check valve 18 in order from the upstream side.
【００２３】さらに、ドレン排出ライン１９が、前記真
空引きライン１１における前記排気ライン１６の接続部
の上流側から分岐して設けられ、その下流端が前記排気
ライン１６における前記第四逆止弁１８の下流側に接続
されている。前記ドレン排出ライン１９は、前記滅菌槽
１内で発生するドレンを外部へ排出する作用をなす。前
記ドレン排出ライン１９には、スチームトラップ２０お
よび第五逆止弁２１が、上流側から順に設けられてい
る。Further, a drain discharge line 19 is provided branching from an upstream side of a connection portion of the evacuation line 16 in the evacuation line 11, and a downstream end thereof is provided with the fourth check valve 18 in the evacuation line 16. Is connected to the downstream side. The drain discharge line 19 has a function of discharging drain generated in the sterilization tank 1 to the outside. The drain discharge line 19 is provided with a steam trap 20 and a fifth check valve 21 in order from the upstream side.
【００２４】ところで、前記滅菌槽１には、温度センサ
２２が設けられており、この温度センサ２２により前記
滅菌槽１内の温度が検出されるようになっている。そし
て、滅菌時、この温度センサ２２の検出温度に基づいて
前記蒸気供給弁６が開閉制御され、前記滅菌槽１内への
滅菌用蒸気の供給が制御される。このようにして、前記
滅菌槽１内の温度は、予め設定された滅菌温度に所定時
間維持されるようになっている。実際には、前記滅菌槽
１内の温度は、滅菌温度よりやや高い温度に維持される
ようになっている。また、前記温度センサ２２は、判定
器２３に信号線２４を介して接続されている。この判定
器２３は、前記温度センサ２２の検出温度に基づいて滅
菌異常を判定するものであり、予め設定された判定条件
にしたがって滅菌異常を判定するようになっている。The sterilization tank 1 is provided with a temperature sensor 22, and the temperature sensor 22 detects the temperature in the sterilization tank 1. During sterilization, the steam supply valve 6 is controlled to open and close based on the temperature detected by the temperature sensor 22, and the supply of sterilization steam into the sterilization tank 1 is controlled. In this manner, the temperature in the sterilization tank 1 is maintained at a preset sterilization temperature for a predetermined time. Actually, the temperature in the sterilization tank 1 is maintained at a temperature slightly higher than the sterilization temperature. The temperature sensor 22 is connected to the determiner 23 via a signal line 24. The determiner 23 determines the sterilization abnormality based on the temperature detected by the temperature sensor 22, and determines the sterilization abnormality according to a preset determination condition.
【００２５】以下、判定条件について具体的に説明する
が、まず、この発明の判定方法の第一実施例について説
明する。この第一実施例においては、判定条件として、
以下の第一判定条件，第二判定条件および第三判定条件
のうちからいずれか１つが選択して設定されている。Hereinafter, the determination conditions will be described in detail. First, the first embodiment of the determination method of the present invention will be described. In the first embodiment, as the determination conditions,
One of the following first determination condition, second determination condition, and third determination condition is selected and set.
【００２６】まず、図２に基づいて、第一判定条件につ
いて説明する。この第一判定条件は、前記滅菌槽１内の
温度が滅菌温度（たとえば、１３５℃）に達した後に、
滅菌温度を３回下回った場合に滅菌異常と判定するよう
になっている。ここで、滅菌温度を下回る回数は、２回
または４回以上に設定することもできるが、誤判定を防
止するとともに、早めに滅菌異常を判定するために、通
常３回に設定される。この第一判定条件によれば、前記
滅菌槽１内の温度が瞬間的に１回だけ滅菌温度を下回る
ような滅菌処理に支障がない状態のときは、滅菌異常と
判定されず、そのまま滅菌処理が継続される。したがっ
て、滅菌処理に支障がないのに滅菌異常と判定するよう
な誤判定を防止して、不必要な滅菌処理の停止を防止す
ることができ、実用上頗る効果的である。First, the first determination condition will be described with reference to FIG. This first determination condition is that after the temperature in the sterilization tank 1 reaches a sterilization temperature (for example, 135 ° C.),
When the temperature falls below the sterilization temperature three times, it is determined that the sterilization is abnormal. Here, the number of times the temperature falls below the sterilization temperature can be set to two or four or more times, but is usually set to three times in order to prevent erroneous determination and to quickly determine a sterilization abnormality. According to this first determination condition, when there is no obstacle to the sterilization process in which the temperature in the sterilization tank 1 instantaneously falls below the sterilization temperature only once, the sterilization process is not determined, and the sterilization process is not performed. Is continued. Therefore, it is possible to prevent erroneous determination such as determining sterilization abnormalities without impairing the sterilization processing, and prevent unnecessary stoppage of the sterilization processing, which is extremely effective in practical use.
【００２７】つぎに、図３に基づいて、第二判定条件に
ついて説明する。この第二判定条件は、前記滅菌槽１内
の温度が滅菌温度（たとえば、１３５℃）に達した後に
滅菌温度を下回り、前記滅菌槽１内の温度が滅菌温度を
下回った状態の時間Ａが所定時間（たとえば、２０秒）
以上続いた場合に滅菌異常と判定するようになってい
る。ここで、前記所定時間は、前記滅菌槽１の容量や前
記蒸気供給ライン５からの蒸気供給能力等に応じて適宜
の値が設定される。この第二判定条件によれば、前記滅
菌槽１内の温度が滅菌温度を下回る状態が長時間続いた
ときに滅菌異常と判定することができる。したがって、
確実に滅菌異常を検出することができ、前記蒸気滅菌装
置の運転時間が不必要に延びることがなく、いつまで経
っても滅菌処理が終了しない状態を回避することができ
る。Next, the second determination condition will be described with reference to FIG. The second determination condition is that the temperature A in the sterilization tank 1 falls below the sterilization temperature after the temperature in the sterilization tank 1 reaches the sterilization temperature (for example, 135 ° C.), and the time A in the state where the temperature in the sterilization tank 1 falls below the sterilization temperature. Predetermined time (for example, 20 seconds)
If the above continues, it is determined that the sterilization is abnormal. Here, the predetermined time is set to an appropriate value according to the capacity of the sterilization tank 1, the steam supply capacity from the steam supply line 5, and the like. According to the second determination condition, it can be determined that the sterilization is abnormal when the temperature in the sterilization tank 1 is lower than the sterilization temperature for a long time. Therefore,
The sterilization abnormality can be reliably detected, the operation time of the steam sterilizer does not needlessly be extended, and a state in which the sterilization process is not completed forever can be avoided.
【００２８】さらに、図４に基づいて、第三判定条件に
ついて説明する。この第三判定条件は、前記滅菌１槽内
の温度が滅菌温度（たとえば、１３５℃）に達した後
に、滅菌異常を判定するために設定した設定温度を下回
った場合に滅菌異常と判定するようになっている。この
設定温度は、滅菌温度より所定値だけ低い温度（たとえ
ば、滅菌温度−１０℃）に設定されており、前記滅菌槽
１内の温度が瞬間的に少しだけ滅菌温度を下回るような
滅菌処理に支障がない状態のときは、滅菌異常と判定し
ないような値に設定されている。したがって、この第三
判定条件によれば、滅菌処理に支障がないのに滅菌異常
と判定するような誤判定を防止して、不必要な滅菌処理
の停止を防止することができ、実用上頗る効果的であ
る。Next, the third determination condition will be described with reference to FIG. The third determination condition is that if the temperature in the sterilization tank reaches a sterilization temperature (for example, 135 ° C.) and then falls below a set temperature for determining sterilization abnormality, the sterilization abnormality is determined. It has become. This set temperature is set to a temperature lower than the sterilization temperature by a predetermined value (for example, sterilization temperature −10 ° C.), and the sterilization process is such that the temperature in the sterilization tank 1 is slightly lower than the sterilization temperature instantaneously. When there is no problem, the value is set so that it is not determined that the sterilization is abnormal. Therefore, according to the third determination condition, it is possible to prevent erroneous determination such as determining sterilization abnormality without impairing the sterilization process, and prevent unnecessary stoppage of the sterilization process, which is extremely practical. It is effective.
【００２９】つぎに、この発明の判定方法の第二実施例
について説明する。この第二実施例においては、より確
実に滅菌異常を検出するために、前記３つの判定条件の
うちから選択した２つの判定条件が設定されている（図
示省略）。どの判定条件を選択するかは、前記滅菌槽１
内の温度を制御する際の制御特性等を考慮して選択され
る。そして、選択した２つの判定条件のうち少なくとも
１つに該当した場合、滅菌異常と判定する。滅菌異常と
判定した場合は、滅菌処理を停止するとともに、警報を
発して運転管理者へ知らせるようになっている。したが
って、この第二実施例によれば、滅菌異常として種々の
パターンのものが発生しても、誤判定することなく、よ
り確実に滅菌異常を検出することができる。Next, a second embodiment of the judgment method of the present invention will be described. In the second embodiment, two determination conditions selected from among the three determination conditions are set (not shown) in order to more reliably detect a sterilization abnormality. Which judging condition is selected depends on the sterilization tank 1
Is selected in consideration of the control characteristics and the like when controlling the temperature inside. Then, when at least one of the selected two determination conditions is satisfied, it is determined that the sterilization is abnormal. When it is determined that the sterilization is abnormal, the sterilization process is stopped, and an alarm is issued to notify the operation manager. Therefore, according to the second embodiment, even when various patterns of sterilization abnormality occur, the sterilization abnormality can be detected more reliably without erroneous determination.
【００３０】さらに、この発明の判定方法の第三実施例
について説明する。この第三実施例においては、滅菌異
常を検出する確実性をさらに向上させるために前記３つ
の判定条件がすべて設定されている。そして、図５に示
すように、前記３つの判定条件のうち少なくとも１つに
該当した場合、滅菌異常と判定するようにしている。滅
菌異常と判定した場合は、滅菌処理を停止するととも
に、警報を発して運転管理者へ知らせるようになってい
る。したがって、この第三実施例によれば、滅菌異常と
して種々のパターンのものが発生しても、誤判定するこ
となく、さらに確実に滅菌異常を検出することができ
る。Further, a third embodiment of the determination method of the present invention will be described. In the third embodiment, all the above three determination conditions are set in order to further improve the certainty of detecting a sterilization abnormality. Then, as shown in FIG. 5, when at least one of the three determination conditions is satisfied, it is determined that the sterilization is abnormal. When it is determined that the sterilization is abnormal, the sterilization process is stopped, and an alarm is issued to notify the operation manager. Therefore, according to the third embodiment, even if various patterns of sterilization abnormality occur, the sterilization abnormality can be detected more reliably without erroneous determination.
【００３１】[0031]
【発明の効果】この発明によれば、蒸気滅菌装置におい
て、滅菌異常の誤判定を防止することができるととも
に、滅菌異常を確実に検出することができる。According to the present invention, in a steam sterilizer, erroneous determination of sterilization abnormality can be prevented and sterilization abnormality can be reliably detected.
【図１】この発明を適用する蒸気滅菌装置の概略構成を
示す説明図である。FIG. 1 is an explanatory diagram showing a schematic configuration of a steam sterilizer to which the present invention is applied.
【図２】この発明における第一判定条件の概要を示す説
明図である。FIG. 2 is an explanatory diagram showing an outline of a first determination condition in the present invention.
【図３】この発明における第二判定条件の概要を示す説
明図である。FIG. 3 is an explanatory diagram showing an outline of a second determination condition in the present invention.
【図４】この発明における第三判定条件の概要を示す説
明図である。FIG. 4 is an explanatory diagram showing an outline of a third determination condition in the present invention.
【図５】この発明における３つの判定条件を組み合わせ
た場合の判定フローの概要を示す説明図である。FIG. 5 is an explanatory diagram showing an outline of a determination flow when three determination conditions are combined in the present invention.
１ 滅菌槽 1 sterilization tank
Claims (5)
るための滅菌判定方法であって、滅菌槽１内の温度が滅
菌温度に達した後に複数回滅菌温度を下回った場合に滅
菌異常と判定することを特徴とする蒸気滅菌装置におけ
る滅菌判定方法。1. A sterilization judging method for judging a sterilization abnormality in a steam sterilization apparatus, wherein the sterilization abnormality is judged when the temperature in the sterilization tank 1 falls below the sterilization temperature a plurality of times after reaching the sterilization temperature. A method for judging sterilization in a steam sterilizer, comprising:
るための滅菌判定方法であって、滅菌槽１内の温度が滅
菌温度に達した後に滅菌温度を下回り、滅菌温度を下回
った状態が所定時間以上続いた場合に滅菌異常と判定す
ることを特徴とする蒸気滅菌装置における滅菌判定方
法。2. A sterilization judging method for judging a sterilization abnormality in a steam sterilizer, wherein the temperature in the sterilization tank 1 falls below the sterilization temperature after reaching the sterilization temperature, and a state in which the temperature falls below the sterilization temperature for a predetermined time. A method for judging sterilization in a steam sterilizer, comprising determining that sterilization is abnormal when the above is continued.
るための滅菌判定方法であって、滅菌槽１内の温度が滅
菌温度に達した後にこの滅菌温度より低い設定温度を下
回った場合に滅菌異常と判定することを特徴とする蒸気
滅菌装置における滅菌判定方法。3. A sterilization judging method for judging a sterilization abnormality in a steam sterilization apparatus, wherein when a temperature in a sterilization tank 1 reaches a sterilization temperature and falls below a set temperature lower than the sterilization temperature, the sterilization abnormality is determined. A method for determining sterilization in a steam sterilizer.
るための滅菌判定方法であって、滅菌異常を判定する判
定条件を複数個設定し、設定した判定条件のうち少なく
とも１つに該当した場合、滅菌異常と判定することを特
徴とする蒸気滅菌装置における滅菌判定方法。4. A sterilization determining method for determining sterilization abnormality in a steam sterilizer, wherein a plurality of determination conditions for determining sterilization abnormality are set, and when at least one of the set determination conditions is satisfied, A method for judging sterilization in a steam sterilizer, comprising judging a sterilization abnormality.
の温度が滅菌温度に達した後に複数回滅菌温度を下回っ
た場合に滅菌異常と判定する第一判定条件と、前記滅菌
槽１内の温度が滅菌温度に達した後に滅菌温度を下回
り、滅菌温度を下回った状態が所定時間以上続いた場合
に滅菌異常と判定する第二判定条件と、前記滅菌槽１内
の温度が滅菌温度に達した後にこの滅菌温度より低い設
定温度を下回った場合に滅菌異常と判定する第三判定条
件のうち少なくとも２つであることを特徴とする請求項
４に記載の蒸気滅菌装置における滅菌判定方法。5. A first judging condition for judging that sterilization is abnormal when the set number of the judging conditions falls below the sterilizing temperature a plurality of times after the temperature in the sterilizing bath 1 reaches the sterilizing temperature; The temperature in the sterilization tank 1 is lower than the sterilization temperature after the temperature reaches the sterilization temperature, and if the temperature below the sterilization temperature continues for a predetermined time or longer, a second determination condition for determining that the sterilization is abnormal, and the temperature in the sterilization tank 1 is the sterilization temperature. 5. The method for judging sterilization in a steam sterilizer according to claim 4, wherein at least two of the third judging conditions for judging a sterilization abnormality when the temperature falls below a set temperature lower than the sterilization temperature after reaching the temperature are reached. .
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|---|---|---|---|
| JP2000316103A JP4962677B2 (en) | 2000-10-17 | 2000-10-17 | Sterilization judgment method in steam sterilizer |
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| JP2000316103A JP4962677B2 (en) | 2000-10-17 | 2000-10-17 | Sterilization judgment method in steam sterilizer |
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| Publication Number | Publication Date |
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| JP4962677B2 JP4962677B2 (en) | 2012-06-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006061860A (en) * | 2004-08-27 | 2006-03-09 | Pentel Corp | Electronic bacteriostatic apparatus having state reporting means |
| JP2021108975A (en) * | 2020-01-10 | 2021-08-02 | 三浦工業株式会社 | Sterilization processing method and sterilizer |
| CN113536189A (en) * | 2020-04-22 | 2021-10-22 | 杭州释普科技有限公司 | Steam pressure sterilizer sterilization effect judgment method |
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| JPH0984858A (en) * | 1995-09-22 | 1997-03-31 | Sekisui Chem Co Ltd | Steam sterilizer |
| JPH09313577A (en) * | 1996-05-29 | 1997-12-09 | Sekisui Chem Co Ltd | Steam sterilizer |
| JPH10127740A (en) * | 1996-10-29 | 1998-05-19 | Miura Co Ltd | Disinfection device |
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|---|---|---|---|---|
| JPS63302854A (en) * | 1987-05-15 | 1988-12-09 | シーメンス、アクチエンゲゼルシヤフト | Automatic sterilizing apparatus |
| JPH0984858A (en) * | 1995-09-22 | 1997-03-31 | Sekisui Chem Co Ltd | Steam sterilizer |
| JPH09313577A (en) * | 1996-05-29 | 1997-12-09 | Sekisui Chem Co Ltd | Steam sterilizer |
| JPH10127740A (en) * | 1996-10-29 | 1998-05-19 | Miura Co Ltd | Disinfection device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006061860A (en) * | 2004-08-27 | 2006-03-09 | Pentel Corp | Electronic bacteriostatic apparatus having state reporting means |
| JP4617778B2 (en) * | 2004-08-27 | 2011-01-26 | ぺんてる株式会社 | Electronic antibacterial device having state notification means |
| JP2021108975A (en) * | 2020-01-10 | 2021-08-02 | 三浦工業株式会社 | Sterilization processing method and sterilizer |
| JP7415574B2 (en) | 2020-01-10 | 2024-01-17 | 三浦工業株式会社 | Sterilization method and sterilization equipment |
| CN113536189A (en) * | 2020-04-22 | 2021-10-22 | 杭州释普科技有限公司 | Steam pressure sterilizer sterilization effect judgment method |
| CN113536189B (en) * | 2020-04-22 | 2024-02-20 | 释普信息科技（上海）有限公司 | Method for judging sterilization effect of steam pressure sterilizer |
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|---|---|
| JP4962677B2 (en) | 2012-06-27 |
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