JPH09313577A - Steam sterilizer - Google Patents

Steam sterilizer

Info

Publication number
JPH09313577A
JPH09313577A JP8135124A JP13512496A JPH09313577A JP H09313577 A JPH09313577 A JP H09313577A JP 8135124 A JP8135124 A JP 8135124A JP 13512496 A JP13512496 A JP 13512496A JP H09313577 A JPH09313577 A JP H09313577A
Authority
JP
Japan
Prior art keywords
temperature
pressure
unit
chamber
sterilization
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP8135124A
Other languages
Japanese (ja)
Other versions
JP3663005B2 (en
Inventor
Susumu Yashiro
進 屋代
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP13512496A priority Critical patent/JP3663005B2/en
Publication of JPH09313577A publication Critical patent/JPH09313577A/en
Application granted granted Critical
Publication of JP3663005B2 publication Critical patent/JP3663005B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a steam sterilizer capable of informing a user of abnormality of a sterilizing process without delay and automatically releasing the abnormality of the sterilizing process to perform normal sterilizing. SOLUTION: This steam sterilizer is equipped with a temperature detecting part 11 to detect the temperature in a chamber, a pressure detecting part 12 to detect the pressure in the chamber, a counter part 15 to count the sterilizing time of a matter to be sterilized stored in the chamber, a temperature gradient measuring part 14 to measure temperature changes based on temperature detected by a temperature detecting part 14, and a pressure gradient measuring part 15 to measure pressure changes based on a pressure detected by a pressure gradient measuring part to measure pressure changes based on a pressure detected by a pressure detecting part 12. A control part 17 automatically releases abnormality of the sterilizing process when the pressure change pattern to be measured by the pressure gradient detecting part 15 is not stable, and operates the sterilizing process again. An alarm part 22 to alarm abnormality of the sterilizing process and a display part 23 to show abnormality are also equipped on.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、加熱ヒータによる
加熱によって注入水を高温、高圧の蒸気とすることによ
り、チャンバ内に収納された医療用器具等の被滅菌物の
滅菌処理を行う蒸気滅菌器に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to steam sterilization for sterilizing an object to be sterilized such as a medical instrument housed in a chamber by converting injected water into high temperature, high pressure steam by heating with a heater. It is related to vessels.

【0002】[0002]

【従来の技術】蒸気滅菌器は、チャンバ内に所定量の水
を注入し、その水をチャンバ内に設けた加熱ヒータによ
って加熱、沸騰させることにより、チャンバ内に高温、
高圧の蒸気を充満させて、医療用器具等の被滅菌物を滅
菌、消毒するものである。
2. Description of the Related Art In a steam sterilizer, a predetermined amount of water is poured into a chamber, and the water is heated and boiled by a heater provided in the chamber, so that a high temperature is maintained in the chamber.
It is used to sterilize and disinfect objects to be sterilized such as medical instruments by filling it with high-pressure steam.

【0003】このような高圧の蒸気滅菌器によって滅菌
を行う場合、例えば特公平4−31707号公報に開示
された蒸気滅菌器では、チャンバの排気弁を開放した状
態で水を沸騰させて空気抜きを行った後、排気弁を閉じ
て滅菌工程に移行するようになっている。
When performing sterilization with such a high-pressure steam sterilizer, for example, in the steam sterilizer disclosed in Japanese Patent Publication No. 4-31707, water is boiled to remove air by opening the exhaust valve of the chamber. After that, the exhaust valve is closed and the sterilization process is started.

【0004】このとき、排気弁を閉じるタイミングは、
空気抜き工程から滅菌工程に移行する際に、排気弁から
排出される蒸気温度を温度センサで検出し、その検出温
度の変化率が、設定された一定時間にわたって安定した
温度値を示すとき、排気弁を閉じるようになっている。
At this time, the timing of closing the exhaust valve is
When shifting from the air venting process to the sterilization process, the temperature of the steam discharged from the exhaust valve is detected by a temperature sensor, and when the rate of change of the detected temperature shows a stable temperature value for a set period of time, the exhaust valve Is designed to close.

【0005】ところで、滅菌工程において完全な滅菌を
行うためには、チャンバ内の空気を全て排気する必要が
あり、空気の残っている領域がある場合には、確実な滅
菌が期待できない。そのため、上記した従来の蒸気滅菌
器では、空気抜き工程時に、温度センサによりチャンバ
内の温度を検出し、温度勾配(変化率)が一定値になっ
たとき、排気弁を閉じるといった手段を採用している。
By the way, in order to perform complete sterilization in the sterilization process, it is necessary to exhaust all the air in the chamber, and if there is a region where air remains, reliable sterilization cannot be expected. Therefore, in the conventional steam sterilizer described above, a means for detecting the temperature in the chamber by the temperature sensor during the air venting process and closing the exhaust valve when the temperature gradient (rate of change) reaches a constant value is adopted. There is.

【0006】[0006]

【発明が解決しようとする課題】このような手段を採用
した従来の蒸気滅菌器においては、チャンバ内の温度セ
ンサ付近の温度は温度勾配が一定値(大気中での水の沸
点温度)に達していても、チャンバ内に収納されている
個々の被滅菌物の温度が水の沸点温度に達しているとは
限らない。
In the conventional steam sterilizer employing such means, the temperature near the temperature sensor in the chamber has a constant temperature gradient (boiling temperature of water in the atmosphere). However, the temperature of each object to be sterilized contained in the chamber does not always reach the boiling point of water.

【0007】チャンバ内に収納される被滅菌物の種類や
量、収納形態などは常に一定の状態ではなく、チャンバ
内に無造作に詰め込まれる場合が多い。例えばメスやハ
サミといった医療用器具を数十本まとめて無造作に収納
する場合が多い。
The type, amount, and storage form of the sterilized objects stored in the chamber are not always constant, but are often randomly packed in the chamber. For example, dozens of medical instruments such as scalpels and scissors are often randomly stored together.

【0008】この場合、熱は周囲に置かれた被滅菌物か
らその中心部に置かれた被滅菌物へと伝わるため、被滅
菌物間において温度差を生じる。そのため、中心部に置
かれた被滅菌物の温度が低い場合(水の沸点温度に達し
ていない場合)でも、温度センサ付近の温度は温度勾配
が一定値に達している場合がある。
In this case, heat is transferred from the sterilized object placed in the surroundings to the sterilized object placed in the center thereof, so that a temperature difference occurs between the sterilized objects. Therefore, even when the temperature of the object to be sterilized placed in the center is low (when the boiling point temperature of water has not reached), the temperature gradient near the temperature sensor may reach a constant value.

【0009】そして、このままの状態で排気弁を閉じて
滅菌温度まで上昇させたとしても、中心部にある被滅菌
物の付近の温度は、水の沸点温度よりも低い温度に留ま
ることになる。
Even if the exhaust valve is closed and the temperature is raised to the sterilization temperature in this state, the temperature in the vicinity of the object to be sterilized in the central portion remains lower than the boiling temperature of water.

【0010】つまり、チャンバ内に空気が残ったまま滅
菌工程に移行するため、多数本の被滅菌物の中心部分で
は、滅菌温度に達しないまま滅菌工程を終了してしまう
ことになる。そのため、被滅菌物が完全には滅菌され
ず、滅菌不良となってしまうといった問題があった。
That is, since the sterilization process is carried out while the air remains in the chamber, the sterilization process is terminated before the sterilization temperature is reached in the central portion of a large number of objects to be sterilized. Therefore, there is a problem that the object to be sterilized is not completely sterilized, resulting in poor sterilization.

【0011】本発明は係る問題点を解決すべく創案され
たもので、その目的は、滅菌工程の異常をいち早く使用
者に知らせるとともに、滅菌工程の異常を自動的に解除
して正常な滅菌を行うことのできる蒸気滅菌器を提供す
ることにある。
The present invention was devised to solve the above problems, and its purpose is to promptly inform the user of an abnormality in the sterilization process and automatically cancel the abnormality in the sterilization process to ensure normal sterilization. It is to provide a steam sterilizer that can be performed.

【0012】[0012]

【課題を解決するための手段】上記課題を解決するた
め、本発明の請求項1記載の蒸気滅菌器は、被滅菌物を
収納し内底部に加熱ヒータを有するチャンバと、このチ
ャンバ内に注入する水を貯留する貯水タンクと、この貯
水タンクと前記チャンバとを連通する給水管と、この給
水管の開閉を行う給排水弁と、前記チャンバ内に発生し
た蒸気を排出する排気管と、この排気管の開閉を行う排
気弁とを備えた蒸気滅菌器において、前記チャンバ内の
温度を検出する温度検出部と、前記チャンバ内の圧力を
検出する圧力検出部と、前記チャンバに収納された被滅
菌物の滅菌時間を計数する計数部と、前記温度検出部に
よる検出温度に基づいて温度変化を計測する温度計測部
と、前記圧力検出部による検出圧力に基づいて圧力変化
を計測する圧力計測部と、前記温度計測部によって計測
される温度変化が滅菌温度に達した後も、前記圧力計測
部によって計測される圧力変化パターンが安定しないと
き、滅菌工程の異常を警報する警報部とを備えたもので
ある。
In order to solve the above problems, a steam sterilizer according to claim 1 of the present invention is a chamber for accommodating an object to be sterilized and having a heater on its inner bottom, and a chamber for injecting the same into the chamber. A water storage tank for storing water, a water supply pipe communicating the water storage tank with the chamber, a water supply / drain valve for opening / closing the water supply pipe, an exhaust pipe for discharging steam generated in the chamber, and an exhaust gas In a steam sterilizer equipped with an exhaust valve for opening and closing a pipe, a temperature detecting unit for detecting a temperature in the chamber, a pressure detecting unit for detecting a pressure in the chamber, and a sterilization target housed in the chamber A counting unit that counts the sterilization time of an object, a temperature measurement unit that measures a temperature change based on the temperature detected by the temperature detection unit, and a pressure measurement that measures a pressure change based on the pressure detected by the pressure detection unit. And an alarm unit that warns of an abnormality in the sterilization process when the pressure change pattern measured by the pressure measurement unit is not stable even after the temperature change measured by the temperature measurement unit reaches the sterilization temperature. It is a thing.

【0013】また、本発明の請求項2記載の蒸気滅菌器
は、被滅菌物を収納し内底部に加熱ヒータを有するチャ
ンバと、このチャンバ内に注入する水を貯留する貯水タ
ンクと、この貯水タンクと前記チャンバとを連通する給
水管と、この給水管の開閉を行う給排水弁と、前記チャ
ンバ内に発生した蒸気を排出する排気管と、この排気管
の開閉を行う排気弁とを備えた蒸気滅菌器において、前
記チャンバ内の温度を検出する温度検出部と、前記チャ
ンバ内の圧力を検出する圧力検出部と、前記チャンバに
収納された被滅菌物の滅菌時間を計数する計数部と、前
記温度検出部による検出温度に基づいて温度変化を計測
する温度計測部と、前記圧力検出部による検出圧力に基
づいて圧力変化を計測する圧力計測部と、前記温度検出
部、圧力検出部、計数部、温度計測部、圧力計測部の各
出力値に基づいて滅菌工程の制御を行う制御部とを備
え、前記制御部は、前記温度計測部によって計測される
温度変化が滅菌温度に達した後も、前記圧力計測部によ
って計測される圧力変化パターンが安定しないとき、前
記排気弁を開いて排気を行うとともに、前記加熱ヒータ
による加熱状態を継続し、一定時間経過後に前記排気弁
を閉じて、再度、滅菌工程の制御を行うものである。
Further, the steam sterilizer according to claim 2 of the present invention is a chamber for accommodating an object to be sterilized and having a heater on the inner bottom, a water storage tank for storing water to be injected into the chamber, and this water storage. A water supply pipe communicating the tank and the chamber, a water supply / drainage valve for opening / closing the water supply pipe, an exhaust pipe for discharging steam generated in the chamber, and an exhaust valve for opening / closing the exhaust pipe are provided. In the steam sterilizer, a temperature detection unit that detects the temperature in the chamber, a pressure detection unit that detects the pressure in the chamber, and a counting unit that counts the sterilization time of the sterilized object housed in the chamber, A temperature measuring unit that measures a temperature change based on a temperature detected by the temperature detecting unit, a pressure measuring unit that measures a pressure change based on a pressure detected by the pressure detecting unit, the temperature detecting unit, a pressure detecting unit, A control unit that controls the sterilization process based on each output value of several parts, a temperature measurement unit, and a pressure measurement unit, and the control unit has a temperature change measured by the temperature measurement unit that has reached a sterilization temperature. After that, when the pressure change pattern measured by the pressure measuring unit is not stable, the exhaust valve is opened to perform exhaust, the heating state by the heating heater is continued, and the exhaust valve is closed after a certain period of time elapses. The sterilization process is controlled again.

【0014】また、本発明の請求項3記載の蒸気滅菌器
は、被滅菌物を収納し内底部に加熱ヒータを有するチャ
ンバと、このチャンバ内に注入する水を貯留する貯水タ
ンクと、この貯水タンクと前記チャンバとを連通する給
水管と、この給水管の開閉を行う給排水弁と、前記チャ
ンバ内に発生した蒸気を排出する排気管と、この排気管
の開閉を行う排気弁とを備えた蒸気滅菌器において、前
記チャンバ内の温度を検出する温度検出部と、前記チャ
ンバ内の圧力を検出する圧力検出部と、前記チャンバに
収納された被滅菌物の滅菌時間を計数する計数部と、前
記温度検出部による検出温度に基づいて温度変化を計測
する温度計測部と、前記圧力検出部による検出圧力に基
づいて圧力変化を計測する圧力計測部と、滅菌工程の異
常を表示する表示部と、前記温度検出部、圧力検出部、
計数部、温度計測部、圧力計測部の各出力値に基づいて
滅菌工程の制御を行う制御部とを備え、前記温度計測部
によって計測される温度変化が滅菌温度に達した後も、
前記圧力計測部によって計測される圧力変化パターンが
安定しないとき、前記制御部は滅菌工程の制御を中止す
るとともに、前記表示部によって滅菌工程の異常を表示
するものである。
Further, the steam sterilizer according to claim 3 of the present invention is a chamber for accommodating an object to be sterilized and having a heater on the inner bottom, a water storage tank for storing water to be injected into the chamber, and the water storage tank. A water supply pipe communicating the tank and the chamber, a water supply / drainage valve for opening / closing the water supply pipe, an exhaust pipe for discharging steam generated in the chamber, and an exhaust valve for opening / closing the exhaust pipe are provided. In the steam sterilizer, a temperature detection unit that detects the temperature in the chamber, a pressure detection unit that detects the pressure in the chamber, and a counting unit that counts the sterilization time of the sterilized object housed in the chamber, A temperature measurement unit that measures a temperature change based on the temperature detected by the temperature detection unit, a pressure measurement unit that measures a pressure change based on the pressure detected by the pressure detection unit, and a display that displays an abnormality in the sterilization process. When the temperature detecting unit, the pressure detecting unit,
A counting unit, a temperature measuring unit, and a control unit that controls the sterilization process based on each output value of the pressure measuring unit, even after the temperature change measured by the temperature measuring unit reaches the sterilization temperature,
When the pressure change pattern measured by the pressure measuring unit is not stable, the control unit stops the control of the sterilization process and displays the abnormality of the sterilization process by the display unit.

【0015】[0015]

【発明の実施の形態】以下、本発明の実施の形態につい
て、図面を参照して説明する。
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

【0016】図2は、本発明の蒸気滅菌器の概略構成図
を示している。
FIG. 2 shows a schematic diagram of the steam sterilizer of the present invention.

【0017】同図において、蒸気滅菌器は、主としてピ
ンセットや注射針等の医療用器具である被滅菌物(図示
省略)を収納するチャンバ1と、このチャンバ1内に注
入する水を貯留する貯水タンク8と、この貯水タンク8
とチャンバ1とを連通する給水管6と、この給水管6の
開閉を行う給排水弁7と、チャンバ1内に発生した蒸気
を排出する排気管9と、この排気管9の開閉を行う排気
弁10とを備えている。
In FIG. 1, a steam sterilizer is mainly composed of a chamber 1 for storing an object to be sterilized (not shown) which is a medical instrument such as tweezers and an injection needle, and a water storage for storing water to be injected into the chamber 1. Tank 8 and this water storage tank 8
And a chamber 1, and a water supply pipe 6 that communicates with the chamber 1, a water supply / drainage valve 7 that opens and closes the water supply pipe 6, an exhaust pipe 9 that discharges steam generated in the chamber 1, and an exhaust valve that opens and closes the exhaust pipe 9. 10 and 10.

【0018】チャンバ1には、その一側部に開閉蓋2が
装着されている。また、チャンバ1の内底部には、被滅
菌物を載置する載置台5が設けられているとともに、チ
ャンバ1内に蓄えられた水を加熱する加熱ヒータ4が設
けられている。さらに、チャンバ1には、チャンバ1内
の温度を検出する温度検出部11と、チャンバ1内の圧
力を検出する圧力検出部12とが設けられている。
An opening / closing lid 2 is attached to one side of the chamber 1. Further, a mounting table 5 for mounting an object to be sterilized is provided on the inner bottom portion of the chamber 1, and a heater 4 for heating water stored in the chamber 1 is also provided. Further, the chamber 1 is provided with a temperature detection unit 11 that detects the temperature inside the chamber 1 and a pressure detection unit 12 that detects the pressure inside the chamber 1.

【0019】給排水弁7及び排気弁10としては、例え
ば電磁弁やボールバルブが好適に用いられる。
As the water supply / drainage valve 7 and the exhaust valve 10, for example, an electromagnetic valve or a ball valve is preferably used.

【0020】図1は、上記構成の蒸気滅菌器の電気的構
成を示すブロック図である。
FIG. 1 is a block diagram showing the electrical construction of the steam sterilizer having the above construction.

【0021】すなわち、温度検出部11の出力は、その
検出温度に基づいて温度変化(本例では温度勾配)を計
測する温度勾配計測部14に導かれており、圧力検出部
12の出力は、その検出圧力に基づいて圧力変化(本例
では圧力勾配)を計測する圧力勾配計測部15に導かれ
ている。
That is, the output of the temperature detecting unit 11 is led to the temperature gradient measuring unit 14 which measures the temperature change (temperature gradient in this example) based on the detected temperature, and the output of the pressure detecting unit 12 is It is guided to the pressure gradient measuring unit 15 that measures the pressure change (pressure gradient in this example) based on the detected pressure.

【0022】また、温度勾配計測部14及び圧力勾配計
測部15の各出力は、蒸気滅菌器の動作全体を制御する
制御部17とに導かれている。
The respective outputs of the temperature gradient measuring section 14 and the pressure gradient measuring section 15 are led to a control section 17 which controls the overall operation of the steam sterilizer.

【0023】また、制御部17の各制御出力は、加熱ヒ
ータ4を駆動するヒータ駆動部19と、給排水弁7を開
閉駆動する給排水弁駆動部20と、排気弁10を開閉駆
動する排気弁駆動部21とに導かれている。また、制御
部17の出力は、滅菌工程の異常をブザー等によって警
報する警報部22と、滅菌工程の異常を表示するCR
T、LCD、LED等からなる表示部23とに導かれて
いる。さらに、制御部17は、滅菌工程での滅菌時間及
び圧力勾配計測部15で計測された圧力変化が一定値
(勾配が一定)となってからの一定時間を計数する計数
部18と双方向の接続となっている。
Each control output of the control unit 17 includes a heater drive unit 19 for driving the heater 4, a water supply / drain valve drive unit 20 for opening / closing the water supply / drain valve 7, and an exhaust valve drive for opening / closing the exhaust valve 10. It is guided to the part 21. Further, the output of the control unit 17 is an alarm unit 22 for alarming an abnormality of the sterilization process by a buzzer or the like, and a CR for displaying an abnormality of the sterilization process.
It is guided to the display unit 23 including T, LCD, LED and the like. Further, the control unit 17 is bidirectional with the counting unit 18 that counts the sterilization time in the sterilization process and the fixed time after the pressure change measured by the pressure gradient measuring unit 15 becomes a constant value (gradient is constant). It is connected.

【0024】ここで、蒸気滅菌器の通常時の動作につい
て、図3に示すフローチャート及び図4に示す温度及び
圧力変化図を参照して説明する。
The normal operation of the steam sterilizer will now be described with reference to the flow chart shown in FIG. 3 and the temperature and pressure change diagram shown in FIG.

【0025】蒸気滅菌器が動作を開始すると、制御部1
7は、給排水弁駆動部20を制御して、給排水弁7を開
く。これにより、貯水タンク8内の水がその高低差によ
って給水管6を通り、チャンバ1内に注水される(ステ
ップS1)。このとき、排気弁10は、開いた状態とな
っている。そして、注水が完了すると、制御部17は、
給排水弁駆動部20を制御して、給排水弁7を閉じる。
When the steam sterilizer starts its operation, the control unit 1
7 controls the water supply / drainage valve drive unit 20 to open the water supply / drainage valve 7. As a result, the water in the water storage tank 8 passes through the water supply pipe 6 due to the height difference and is poured into the chamber 1 (step S1). At this time, the exhaust valve 10 is in an open state. Then, when the water injection is completed, the control unit 17
The water supply / drainage valve drive unit 20 is controlled to close the water supply / drainage valve 7.

【0026】この後、制御部17は、時刻t1において
ヒータ駆動部19を制御し、加熱ヒータ4に通電を開始
する(ステップS2)。これにより、チャンバ1内の水
が加熱され、水温が上昇する(符号31により示す)。
このとき、排気弁10が開状態となっていることから、
チャンバ1内の圧力は大気圧(ほぼ1気圧)で一定とな
っている(符号41により示す)。
After that, the controller 17 controls the heater driver 19 at time t1 to start energizing the heater 4 (step S2). As a result, the water in the chamber 1 is heated and the water temperature rises (indicated by reference numeral 31).
At this time, since the exhaust valve 10 is in the open state,
The pressure in the chamber 1 is constant at atmospheric pressure (approximately 1 atm) (indicated by reference numeral 41).

【0027】そして、時刻t2において水の沸点温度
(100度)付近に達すると、内部温度は沸点温度近傍
で安定する(符号32により示す)。制御部17は、内
部温度が沸点温度近傍で安定したことを確認した後(ス
テップS3)、時刻t3において排気弁10を閉じる
(ステップS4)。
When the temperature reaches the boiling point temperature (100 degrees) of water at time t2, the internal temperature stabilizes near the boiling point temperature (indicated by reference numeral 32). After confirming that the internal temperature is stable near the boiling point temperature (step S3), the control unit 17 closes the exhaust valve 10 at time t3 (step S4).

【0028】排気弁10を閉じると、チャンバ1が密閉
されることから、その後は飽和蒸気によって内部の圧力
が上昇する(符号42により示す)とともに、チャンバ
1の内部温度も圧力上昇とともに上昇する(符号33に
より示す)。そして、チャンバ1の内部温度が、時刻t
4において滅菌温度である例えば130度まで上昇する
と、その後は一定温度となるように制御部17が加熱ヒ
ータ4を制御する(ステップS5,S6)。そのため、
時刻t4以降は、滅菌温度である130度で安定すると
ともに、内部圧力も時刻t4時点の値で一定に保たれる
ことになる(符号34,43により示す)。
When the exhaust valve 10 is closed, the chamber 1 is hermetically closed, and thereafter, the internal pressure of saturated chamber rises (indicated by reference numeral 42) and the internal temperature of the chamber 1 also rises as the pressure rises (see 42). Reference numeral 33). Then, the internal temperature of the chamber 1 becomes
When the temperature rises to the sterilization temperature of 130 ° C. in 4, the controller 17 controls the heater 4 so that the temperature becomes constant (steps S5 and S6). for that reason,
After time t4, the sterilization temperature is stabilized at 130 degrees, and the internal pressure is also kept constant at the value at time t4 (indicated by reference numerals 34 and 43).

【0029】このとき、制御部17は、内部圧力が一定
となる時刻t4より一定時間T0の計数を計数部18に
よって開始し、内部圧力の一定状態を時間T0の間計数
すると、時刻t5において計数部18の計数値をクリア
し(ステップS7,S8,S9)、同時に滅菌時間であ
る時間T4を計数部18によって計数する(ステップS
10)。すなわち、時刻t5において滅菌工程を開始す
る。
At this time, the control unit 17 starts counting the constant time T0 from the time t4 when the internal pressure becomes constant by the counting unit 18, and when the constant state of the internal pressure is counted for the time T0, counts at the time t5. The count value of the section 18 is cleared (steps S7, S8, S9), and at the same time, the sterilization time T4 is counted by the counting section 18 (step S).
10). That is, the sterilization process is started at time t5.

【0030】そして、滅菌工程である時間T4が経過し
た時刻t8において、加熱ヒータ4による加熱を停止す
るとともに(ステップS11,S12)、排気弁10を
開放する(ステップS13)。これにより、時刻t8以
降はチャンバ1内の温度及び圧力が急激に低下し、最終
的には大気温度及び体気圧力まで低下して安定すること
になる。
At time t8 when the time T4, which is the sterilization process, has elapsed, heating by the heater 4 is stopped (steps S11 and S12), and the exhaust valve 10 is opened (step S13). As a result, after the time t8, the temperature and pressure inside the chamber 1 rapidly decrease, and finally decrease to the atmospheric temperature and body pressure and stabilize.

【0031】すなわち、蒸気滅菌器の通常の動作では、
図4に示すように、水の加熱時間である時間T1は、内
部温度は一定勾配で上昇するとともに、内部圧力は大気
圧に保たれ(符号31,41)、沸点温度近傍に到達
後、排気弁10を閉じるまでの時間T2は、内部温度及
び内部圧力とも一定に保たれ(符号32,41)、排気
弁10を閉じた後、内部温度が滅菌温度まで上昇する時
間T3は、内部温度及び内部圧力ともに一定勾配で上昇
し(符号33,42)、滅菌温度に到達後、排気弁10
開放までの時間T4は、内部温度及び内部圧力ともに一
定に保たれる(符号34,43)ことになる。
That is, in the normal operation of the steam sterilizer,
As shown in FIG. 4, at time T1, which is the heating time of water, the internal temperature rises at a constant gradient, the internal pressure is kept at atmospheric pressure (reference numerals 31 and 41), and after reaching the vicinity of the boiling point temperature, the exhaust gas is exhausted. The time T2 until the valve 10 is closed is kept constant with the internal temperature and the internal pressure (reference numerals 32 and 41), and the time T3 when the internal temperature rises to the sterilization temperature after the exhaust valve 10 is closed is the internal temperature and the internal pressure. Both the internal pressure rises at a constant gradient (symbols 33, 42), and after reaching the sterilization temperature, the exhaust valve 10
The time T4 until the opening is maintained at both the internal temperature and the internal pressure (reference numerals 34 and 43).

【0032】ここで、チャンバ1に多数本の被滅菌物が
収納され、そのために多数本の被滅菌物の中心部分に空
気層ができている場合の圧力変化を図4中に一点鎖線で
示す。
Here, the pressure change when a large number of objects to be sterilized are stored in the chamber 1 and an air layer is formed in the central portion of the objects to be sterilized for this reason is shown by the alternate long and short dash line in FIG. .

【0033】この場合、水の加熱時間である時間T1
は、通常動作の場合と同様に、内部圧力は大気圧に保た
れる(符号31,41)。また、沸点温度近傍に到達
後、排気弁10を閉じるまでの時間T2においても、通
常動作の場合と同様に、内部圧力は一定に保たれる(符
号32,41)。
In this case, time T1 which is the heating time of water
The internal pressure is maintained at atmospheric pressure as in the case of normal operation (reference numerals 31 and 41). Also, during the time T2 after reaching the vicinity of the boiling point temperature until the exhaust valve 10 is closed, the internal pressure is kept constant (reference numerals 32 and 41) as in the case of normal operation.

【0034】しかしながら、排気弁10を閉じた後、内
部温度が滅菌温度まで上昇する時間T3においては、通
常動作の場合と同様に、内部圧力は一定勾配で上昇する
ものの、その上昇率は、通常の場合より小さい(符号4
22)。これは、内部温度が滅菌温度まで達したと判断
される時刻t4において、実際には多数本の被滅菌物の
中心部分に空気が残っているためである。
However, after the exhaust valve 10 is closed, at time T3 when the internal temperature rises to the sterilization temperature, the internal pressure rises at a constant gradient as in the case of normal operation, but the rate of increase is usually Is smaller than
22). This is because at time t4 when it is determined that the internal temperature has reached the sterilization temperature, air actually remains in the central portion of many sterilized objects.

【0035】そのため、滅菌温度に到達後、排気弁10
開放までの時間T4においては、この残存空気の影響
で、内部圧力が一定勾配で上昇することになる(符号4
33)。これは、多数本の被滅菌物の中心部分に、滅菌
温度以下の温度の空気が残存し、この残存空気が徐々に
温められて膨張するため、密閉されたチャンバ1内の圧
力が上昇するためである。
Therefore, after reaching the sterilization temperature, the exhaust valve 10
During the time T4 until opening, the internal pressure rises at a constant gradient due to the influence of this residual air (reference numeral 4).
33). This is because the air at a temperature lower than the sterilization temperature remains in the central portion of many objects to be sterilized, and the remaining air is gradually warmed and expanded, so that the pressure in the closed chamber 1 rises. Is.

【0036】このように、チャンバ1内に多数本の被滅
菌物が収納された結果、チャンバ1内が沸点温度に達し
て排気弁10を閉じたときに、多数本の被滅菌物の中心
部分に残存空気がある場合は、残存空気の無い場合と比
べて、圧力が特徴的な変化を示すことになる。
As a result of storing a large number of objects to be sterilized in the chamber 1 as described above, the central portion of the objects to be sterilized when the exhaust valve 10 is closed by reaching the boiling temperature in the chamber 1 When there is residual air in, the pressure shows a characteristic change compared to when there is no residual air.

【0037】そこで、本発明の蒸気滅菌器では、このよ
うな通常動作時と異常動作時とにおける圧力変化パター
ンの相違に着目して、滅菌工程の異常の警報や、滅菌工
程の異常を自動的に解除して正常な滅菌を行えるように
したものである。
Therefore, in the steam sterilizer of the present invention, paying attention to the difference in the pressure change pattern between the normal operation and the abnormal operation, the sterilization process alarm and the sterilization process error are automatically detected. It is released to enable normal sterilization.

【0038】以下、排気弁10を閉じるときにチャンバ
1内に残存空気があるために滅菌工程の異常が発生した
場合の動作を、時刻t4以降について説明する。
The operation when the abnormality in the sterilization process occurs due to the residual air in the chamber 1 when the exhaust valve 10 is closed will be described below from time t4.

【0039】上述したように、排気弁10を閉じるとき
(時刻t3)にチャンバ1に収納された多数本の被滅菌
物の中心部分に空気が残存している場合には、その後の
圧力変化は図4中に一点鎖線で示すパターンとなる。
As described above, when air remains in the central portion of a large number of objects to be sterilized stored in the chamber 1 when the exhaust valve 10 is closed (time t3), the subsequent pressure change is The pattern shown by the alternate long and short dash line in FIG. 4 is obtained.

【0040】すなわち、チャンバ1の内部温度が、時刻
t4において滅菌温度である例えば130度まで上昇す
ると、その後は一定温度となるように制御部17が加熱
ヒータ4を制御する(ステップS5,S6)。そのた
め、温度勾配計測部14によって計測される温度変化
は、時刻t4以降、滅菌温度である130度で安定する
が、圧力勾配計測部15によって計測される圧力変化
は、時刻t4以降も一定勾配で上昇し続ける。
That is, when the internal temperature of the chamber 1 rises to the sterilization temperature of, for example, 130 degrees at time t4, the controller 17 controls the heater 4 so that the temperature becomes constant (steps S5 and S6). . Therefore, the temperature change measured by the temperature gradient measuring unit 14 is stable at 130 degrees, which is the sterilization temperature, after the time t4, but the pressure change measured by the pressure gradient measuring unit 15 is a constant gradient after the time t4. Keep rising.

【0041】制御部17は、この時刻t4以降の圧力変
化の勾配を一定時間T0検出し、圧力勾配に変化がある
ことを確認して警報部22を駆動し、例えばブザー音等
を出力する(ステップS14)。また、表示部23に滅
菌工程の異常を表示する(ステップS14)。これによ
り、使用者は滅菌工程に異常があることを知ることがで
きるので、即座に適切な対応(滅菌工程を手動操作によ
って停止する等の対応)を取ることができる。また、滅
菌工程を自動停止させる場合には、ステップS15から
ステップS16へと動作を進め、制御部17によって滅
菌工程を自動停止させる。
The control unit 17 detects the gradient of the pressure change after the time t4 for a certain period of time T0, confirms that the pressure gradient has changed, drives the alarm unit 22, and outputs, for example, a buzzer sound or the like ( Step S14). Further, the abnormality of the sterilization process is displayed on the display unit 23 (step S14). As a result, the user can know that there is an abnormality in the sterilization process, and can immediately take appropriate measures (measures such as stopping the sterilization process by manual operation). When the sterilization process is automatically stopped, the operation proceeds from step S15 to step S16, and the control unit 17 automatically stops the sterilization process.

【0042】また、制御部17が滅菌工程の異常を自動
的に解除する機能を有する場合には、ステップS15か
らステップS17へと動作を進める。すなわち、制御部
17は、排気弁10を開いて排気を行うとともに(ステ
ップS17)、加熱ヒータ4による加熱状態を継続す
る。そして、予め設定された一定時間経過後に(ステッ
プS18)、排気弁10を閉じて(ステップS4)、再
度、滅菌工程の制御を行う。これにより、使用者がその
場にいなくても、滅菌工程の異常を自動的に解除して、
正常な滅菌工程に移行することができる。
When the control unit 17 has a function of automatically canceling the abnormality in the sterilization process, the operation proceeds from step S15 to step S17. That is, the control unit 17 opens the exhaust valve 10 to perform exhaust (step S17) and continues the heating state by the heater 4. Then, after a lapse of a preset fixed time (step S18), the exhaust valve 10 is closed (step S4), and the sterilization process is controlled again. With this, even if the user is not there, the abnormality of the sterilization process is automatically canceled,
It is possible to shift to a normal sterilization process.

【0043】なお、滅菌工程の異常を自動的に解除する
場合には、ステップS14のブザー音等による警報や異
常表示を省略してもよい。
When the abnormality in the sterilization process is automatically canceled, the alarm or abnormality display by the buzzer sound or the like in step S14 may be omitted.

【0044】このように、本発明の蒸気滅菌器によれ
ば、滅菌工程の初期の段階で異常を判別し、適切な対応
を取ることができるものである。
As described above, according to the steam sterilizer of the present invention, an abnormality can be discriminated at an early stage of the sterilization process, and an appropriate countermeasure can be taken.

【0045】[0045]

【発明の効果】本発明の請求項1記載の蒸気滅菌器は、
温度計測部によって計測される温度変化が滅菌温度に達
した後も、圧力計測部によって計測される圧力変化パタ
ーンが安定しないとき、滅菌工程の異常を警報する警報
部を備えた構成としたので、滅菌工程の初期の段階で異
常を判別し、使用者に知らせることができる。そのた
め、使用者は、その後の適切な対応を取ることができる
ものである。
The steam sterilizer according to claim 1 of the present invention comprises:
Even after the temperature change measured by the temperature measurement unit reaches the sterilization temperature, when the pressure change pattern measured by the pressure measurement unit is not stable, the alarm unit warns the abnormality of the sterilization process. Abnormalities can be identified and notified to the user at an early stage of the sterilization process. Therefore, the user can take appropriate measures thereafter.

【0046】また、本発明の請求項2記載の蒸気滅菌器
は、温度計測部によって計測される温度変化が滅菌温度
に達した後も、圧力計測部によって計測される圧力変化
パターンが安定しないとき、排気弁を開いて排気を行う
とともに、加熱ヒータによる加熱状態を継続し、一定時
間経過後に排気弁を閉じて、再度、滅菌工程の制御を行
うように構成したので、使用者がその場にいなくても、
滅菌工程の異常を自動的に解除して、正常な滅菌工程に
移行することができるものである。
Further, in the steam sterilizer according to claim 2 of the present invention, when the pressure change pattern measured by the pressure measuring unit is not stable even after the temperature change measured by the temperature measuring unit reaches the sterilization temperature. , The exhaust valve is opened to exhaust the gas, the heating state by the heater is continued, the exhaust valve is closed after a certain period of time, and the sterilization process is controlled again. Even without
The abnormality of the sterilization process can be automatically canceled to shift to the normal sterilization process.

【0047】また、本発明の請求項3記載の蒸気滅菌器
は、温度計測部によって計測される温度変化が滅菌温度
に達した後も、圧力計測部によって計測される圧力変化
パターンが安定しないとき、制御部が滅菌工程の制御を
中止するとともに、表示部によって滅菌工程の異常を表
示するように構成したので、使用者がその場にいなくて
も、滅菌工程を自動停止できるとともに、停止後に使用
者がその場に戻ったときに、表示部の表示内容によって
自動停止の原因を知ることができるので、その後の適切
な対応を取ることができるものである。
Further, in the steam sterilizer according to claim 3 of the present invention, when the pressure change pattern measured by the pressure measuring unit is not stable even after the temperature change measured by the temperature measuring unit reaches the sterilization temperature. Since the control unit stops the control of the sterilization process and displays the abnormality of the sterilization process by the display unit, the sterilization process can be automatically stopped even after the user is not there, and after the stop. When the user returns to the place, the cause of the automatic stop can be known from the display content of the display unit, so that appropriate measures can be taken thereafter.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の蒸気滅菌器の電気的構成を示すブロッ
ク図である。
FIG. 1 is a block diagram showing an electric configuration of a steam sterilizer of the present invention.

【図2】本発明の蒸気滅菌器の概略構成図である。FIG. 2 is a schematic configuration diagram of a steam sterilizer of the present invention.

【図3】本発明の蒸気滅菌器の動作を説明するためのフ
ローチャートである。
FIG. 3 is a flow chart for explaining the operation of the steam sterilizer of the present invention.

【図4】排気弁を閉じるときに残存空気の無い場合とあ
る場合との動作における温度及び圧力の変化を示すグラ
フである。
FIG. 4 is a graph showing changes in temperature and pressure in the operation with and without residual air when the exhaust valve is closed.

【符号の説明】[Explanation of symbols]

1 チャンバ 4 加熱ヒータ 6 給排水管 7 給排水弁 9 排気管 10 排気弁 11 温度検出部 12 圧力検出部 14 温度勾配計測部(温度計測部) 15 圧力勾配計測部(圧力計測部) 16 異常判別部 17 制御部 18 異常警報部 22 警報部 23 表示部 DESCRIPTION OF SYMBOLS 1 Chamber 4 Heater 6 Water supply / drain pipe 7 Water supply / drain valve 9 Exhaust pipe 10 Exhaust valve 11 Temperature detection part 12 Pressure detection part 14 Temperature gradient measurement part (temperature measurement part) 15 Pressure gradient measurement part (pressure measurement part) 16 Abnormality determination part 17 Control unit 18 Abnormality alarm unit 22 Alarm unit 23 Display unit

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 被滅菌物を収納し内底部に加熱ヒータを
有するチャンバと、このチャンバ内に注入する水を貯留
する貯水タンクと、この貯水タンクと前記チャンバとを
連通する給水管と、この給水管の開閉を行う給排水弁
と、前記チャンバ内に発生した蒸気を排出する排気管
と、この排気管の開閉を行う排気弁とを備えた蒸気滅菌
器において、 前記チャンバ内の温度を検出する温度検出部と、 前記チャンバ内の圧力を検出する圧力検出部と、 前記チャンバに収納された被滅菌物の滅菌時間を計数す
る計数部と、 前記温度検出部による検出温度に基づいて温度変化を計
測する温度計測部と、 前記圧力検出部による検出圧力に基づいて圧力変化を計
測する圧力計測部と、 前記温度計測部によって計測される温度変化が滅菌温度
に達した後も、前記圧力計測部によって計測される圧力
変化パターンが安定しないとき、滅菌工程の異常を警報
する警報部とを備えたことを特徴とする蒸気滅菌器。
1. A chamber for accommodating an object to be sterilized and having a heater at an inner bottom thereof, a water storage tank for storing water to be injected into the chamber, a water supply pipe connecting the water storage tank with the chamber, In a steam sterilizer equipped with a water supply / drain valve for opening / closing a water supply pipe, an exhaust pipe for discharging steam generated in the chamber, and an exhaust valve for opening / closing the exhaust pipe, the temperature in the chamber is detected. A temperature detection unit, a pressure detection unit that detects the pressure in the chamber, a counting unit that counts the sterilization time of the sterilized object stored in the chamber, and a temperature change based on the temperature detected by the temperature detection unit. A temperature measuring unit for measuring, a pressure measuring unit for measuring a pressure change based on the pressure detected by the pressure detecting unit, and a temperature change measured by the temperature measuring unit even after reaching the sterilization temperature, A steam sterilizer, comprising: an alarm unit for alarming an abnormality in the sterilization process when the pressure change pattern measured by the pressure measuring unit is not stable.
【請求項2】 被滅菌物を収納し内底部に加熱ヒータを
有するチャンバと、このチャンバ内に注入する水を貯留
する貯水タンクと、この貯水タンクと前記チャンバとを
連通する給水管と、この給水管の開閉を行う給排水弁
と、前記チャンバ内に発生した蒸気を排出する排気管
と、この排気管の開閉を行う排気弁とを備えた蒸気滅菌
器において、 前記チャンバ内の温度を検出する温度検出部と、 前記チャンバ内の圧力を検出する圧力検出部と、 前記チャンバに収納された被滅菌物の滅菌時間を計数す
る計数部と、 前記温度検出部による検出温度に基づいて温度変化を計
測する温度計測部と、 前記圧力検出部による検出圧力に基づいて圧力変化を計
測する圧力計測部と、 前記温度検出部、圧力検出部、計数部、温度計測部、圧
力計測部の各出力値に基づいて滅菌工程の制御を行う制
御部とを備え、 前記制御部は、前記温度計測部によって計測される温度
変化が滅菌温度に達した後も、前記圧力計測部によって
計測される圧力変化パターンが安定しないとき、前記排
気弁を開いて排気を行うとともに、前記加熱ヒータによ
る加熱状態を継続し、一定時間経過後に前記排気弁を閉
じて、再度、滅菌工程の制御を行うことを特徴とする蒸
気滅菌器。
2. A chamber for accommodating an object to be sterilized and having a heater at an inner bottom portion, a water storage tank for storing water to be injected into the chamber, a water supply pipe communicating the water storage tank with the chamber, In a steam sterilizer equipped with a water supply / drain valve for opening / closing a water supply pipe, an exhaust pipe for discharging steam generated in the chamber, and an exhaust valve for opening / closing the exhaust pipe, the temperature in the chamber is detected. A temperature detection unit, a pressure detection unit that detects the pressure in the chamber, a counting unit that counts the sterilization time of the sterilized object stored in the chamber, and a temperature change based on the temperature detected by the temperature detection unit. A temperature measuring unit for measuring, a pressure measuring unit for measuring a pressure change based on the pressure detected by the pressure detecting unit, and outputs of the temperature detecting unit, the pressure detecting unit, the counting unit, the temperature measuring unit, and the pressure measuring unit. And a control unit that controls the sterilization process based on a value, wherein the control unit changes the pressure measured by the pressure measurement unit even after the temperature change measured by the temperature measurement unit reaches the sterilization temperature. When the pattern is not stable, the exhaust valve is opened to perform exhaust, the heating state by the heater is continued, the exhaust valve is closed after a certain period of time, and the sterilization process is controlled again. Steam sterilizer.
【請求項3】 被滅菌物を収納し内底部に加熱ヒータを
有するチャンバと、このチャンバ内に注入する水を貯留
する貯水タンクと、この貯水タンクと前記チャンバとを
連通する給水管と、この給水管の開閉を行う給排水弁
と、前記チャンバ内に発生した蒸気を排出する排気管
と、この排気管の開閉を行う排気弁とを備えた蒸気滅菌
器において、 前記チャンバ内の温度を検出する温度検出部と、 前記チャンバ内の圧力を検出する圧力検出部と、 前記チャンバに収納された被滅菌物の滅菌時間を計数す
る計数部と、 前記温度検出部による検出温度に基づいて温度変化を計
測する温度計測部と、 前記圧力検出部による検出圧力に基づいて圧力変化を計
測する圧力計測部と、 滅菌工程の異常を表示する表示部と、 前記温度検出部、圧力検出部、計数部、温度計測部、圧
力計測部の各出力値に基づいて滅菌工程の制御を行う制
御部とを備え、 前記温度計測部によって計測される温度変化が滅菌温度
に達した後も、前記圧力計測部によって計測される圧力
変化パターンが安定しないとき、前記制御部は滅菌工程
の制御を中止するとともに、前記表示部によって滅菌工
程の異常を表示することを特徴とする蒸気滅菌器。
3. A chamber for accommodating an object to be sterilized and having a heater on its inner bottom, a water storage tank for storing water to be injected into the chamber, a water supply pipe communicating the water storage tank with the chamber, In a steam sterilizer equipped with a water supply / drain valve for opening / closing a water supply pipe, an exhaust pipe for discharging steam generated in the chamber, and an exhaust valve for opening / closing the exhaust pipe, the temperature in the chamber is detected. A temperature detection unit, a pressure detection unit that detects the pressure in the chamber, a counting unit that counts the sterilization time of the sterilized object stored in the chamber, and a temperature change based on the temperature detected by the temperature detection unit. A temperature measuring unit for measuring, a pressure measuring unit for measuring a pressure change based on the pressure detected by the pressure detecting unit, a display unit for displaying an abnormality of a sterilization process, the temperature detecting unit, the pressure detecting unit, a meter. Unit, a temperature measurement unit, and a control unit that controls the sterilization process based on the output values of the pressure measurement unit, and the pressure measurement is performed even after the temperature change measured by the temperature measurement unit reaches the sterilization temperature. The steam sterilizer characterized in that when the pressure change pattern measured by the unit is not stable, the control unit stops the control of the sterilization process and displays an abnormality of the sterilization process by the display unit.
JP13512496A 1996-05-29 1996-05-29 Steam sterilizer Expired - Fee Related JP3663005B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13512496A JP3663005B2 (en) 1996-05-29 1996-05-29 Steam sterilizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13512496A JP3663005B2 (en) 1996-05-29 1996-05-29 Steam sterilizer

Publications (2)

Publication Number Publication Date
JPH09313577A true JPH09313577A (en) 1997-12-09
JP3663005B2 JP3663005B2 (en) 2005-06-22

Family

ID=15144389

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13512496A Expired - Fee Related JP3663005B2 (en) 1996-05-29 1996-05-29 Steam sterilizer

Country Status (1)

Country Link
JP (1) JP3663005B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002119579A (en) * 2000-10-17 2002-04-23 Miura Co Ltd Sterilization evaluation method in steam sterilizer
JP2008237919A (en) * 2008-05-12 2008-10-09 Takazono Sangyo Co Ltd Steam sterilizer and method for controlling the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002119579A (en) * 2000-10-17 2002-04-23 Miura Co Ltd Sterilization evaluation method in steam sterilizer
JP2008237919A (en) * 2008-05-12 2008-10-09 Takazono Sangyo Co Ltd Steam sterilizer and method for controlling the same

Also Published As

Publication number Publication date
JP3663005B2 (en) 2005-06-22

Similar Documents

Publication Publication Date Title
AU709496B2 (en) System and method for real-time monitoring and control of load sterilization and parametric release
US6156267A (en) Apparatus and method for real-time monitoring and control of anti-microbial processing
US9107971B2 (en) Intracavity ultrasound probe disinfectant system
JPS63302854A (en) Automatic sterilizing apparatus
JP5952283B2 (en) Apparatus and method for determining sterilization conditions
JPH09313577A (en) Steam sterilizer
JP2020075042A (en) Sterilizer
JPH0984858A (en) Steam sterilizer
US20220175994A1 (en) Load volume determination method for a sterilization apparatus
JPH0928771A (en) Steam sterilizer
JPH0984857A (en) Steam sterilizer
JPH10127740A (en) Disinfection device
JPS643503B2 (en)
JP5100506B2 (en) High pressure steam sterilizer
JP3129472B2 (en) Liquefied gas supply abnormality detector for sterilization
JP2005143998A (en) High-pressure steam sterilizer
JP3643723B2 (en) Steam sterilizer
JP6966077B2 (en) Gas sterilizer
JP3063176U (en) High pressure steam sterilizer
JPH11253141A (en) Pressure device for sterilization
JPH0678972A (en) Steam sterilizer and its control method
JP2005160771A (en) High pressure steam sterilizer
JPH04122261A (en) Steam sterilizer
JP3959963B2 (en) Sterilization method
JPS6345231B2 (en)

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20041207

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20041215

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050209

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20050309

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050325

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080401

Year of fee payment: 3

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090401

Year of fee payment: 4

LAPS Cancellation because of no payment of annual fees