JP2010253036A - Steam sterilization device - Google Patents

Steam sterilization device Download PDF

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JP2010253036A
JP2010253036A JP2009106567A JP2009106567A JP2010253036A JP 2010253036 A JP2010253036 A JP 2010253036A JP 2009106567 A JP2009106567 A JP 2009106567A JP 2009106567 A JP2009106567 A JP 2009106567A JP 2010253036 A JP2010253036 A JP 2010253036A
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valve
steam
opening
steam supply
sterilization chamber
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Yuichi Takahashi
裕一 高橋
Takashi Osaki
崇嗣 大▲崎▼
Masashi Taniguchi
昌志 谷口
Shohei Nishiuchi
将平 西内
Katsuhiko Hasebe
克彦 長谷部
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Miura Co Ltd
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Miura Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To improve the use turnover of a steam sterilization device by shortening a period of time required for an air exclusion process. <P>SOLUTION: The air exclusion process is performed by alternately repeating first operation of exhausting gas in a sterilizing chamber 1 by operating exhaust means 12 and 13 and second operation of supplying steam into the sterilizing chamber 1 by stopping the operation of the exhaust means 12 and 13 and operating steam supply means 5 and 7. The steam supply means 5 and 7 selects first control of adjusting the quantity of supplied steam by gradually increasing and decreasing an opening degree and second control of setting the quantity of supplied steam to be two values of a predetermined quantity and zero without gradually increasing and decreasing the opening degree, and sets the steam supply means 5 and 7 to the predetermined quantity of the second control at the same time or just before the start of second operation. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、滅菌室内へ蒸気を供給して被滅菌物の滅菌を行う蒸気滅菌装置に関するものである。   The present invention relates to a steam sterilization apparatus that supplies steam into a sterilization chamber to sterilize an object to be sterilized.

この種の蒸気滅菌装置において、被滅菌物を収容する滅菌室と、滅菌室への給蒸ラインに設けた開度が徐々に増減する給蒸バルブと、滅菌室と接続される減圧ラインに設けた減圧バルブおよび減圧手段と、給蒸バルブ,減圧バルブおよび減圧手段を制御し、滅菌室内の空気を排除する空気排除工程(排気工程)と被滅菌物を蒸気滅菌する滅菌工程とを行う制御手段とを備えるものは、特許文献1にて知られている。給蒸バルブを開度が徐々に増減する構造のものとしているのは、滅菌室内温度をきめ細かく制御するためである。   In this type of steam sterilizer, provided in a sterilization chamber for storing articles to be sterilized, a steam supply valve for gradually increasing or decreasing the opening degree provided in the steam supply line to the sterilization chamber, and a decompression line connected to the sterilization chamber Control means for controlling the steam supply valve, the pressure reducing valve and the pressure reducing means, and performing an air exhausting process (exhaust process) for excluding air in the sterilization chamber and a sterilizing process for steam sterilizing the article to be sterilized Is known from Patent Document 1. The reason why the steam supply valve has a structure in which the opening gradually increases or decreases is to finely control the temperature in the sterilization chamber.

特許文献1の蒸気滅菌装置における空気排除工程は、特許文献1に記載のように、減圧手段を駆動させて、滅菌室内の空気を排出する第一操作と、減圧手段を停止させ、給蒸バルブを開いて滅菌室内へ蒸気を供給する第二操作とを、交互に数回繰り返すことで行われる。   In the steam sterilization apparatus of Patent Document 1, as described in Patent Document 1, the decompression means is driven to discharge the air in the sterilization chamber and the decompression means is stopped, and the steam supply valve is operated. And the second operation of supplying steam into the sterilization chamber is repeated several times alternately.

特開2001−104455号公報JP 2001-104455 A

しかしながら、従来装置では、図7に示すように、前記減圧手段を停止させ、給蒸バルブを開いて滅菌室内へ蒸気を供給する第二操作を行う際に、給蒸バルブが徐々にしか開かないために、大気圧までの圧力上昇が遅くなり、時間的ロス1を生じてしまう。また、減圧バルブは、乾燥工程内の減圧過程において、減圧速度を調整する必要があるなどの理由で、開度が徐々に増減する構造のものを採用することが考えられる。そうした場合、減圧バルブが開き始めてから閉じるまでの時間遅れによる時間的ロス2を生じ、結果として、減圧バルブを閉じる閉信号から大気圧に圧力が上昇するまでの時間は、時間的ロス1と時間的ロス2を加算した時間だけロスを生ずることになる。   However, in the conventional apparatus, as shown in FIG. 7, when performing the second operation of stopping the pressure reducing means and opening the steam supply valve to supply steam into the sterilization chamber, the steam supply valve is only gradually opened. For this reason, the pressure increase to the atmospheric pressure is delayed, and a time loss 1 occurs. Further, it is conceivable to employ a pressure reducing valve that has a structure in which the opening degree is gradually increased or decreased because the pressure reducing speed needs to be adjusted in the pressure reducing process in the drying process. In such a case, there is a time loss 2 due to a time delay from the start of opening of the pressure reducing valve to the closing, and as a result, the time from the closing signal for closing the pressure reducing valve to the pressure rising to the atmospheric pressure is time loss 1 and time. A loss is generated only for the time obtained by adding the target loss 2.

この種の蒸気滅菌器においては、如何にして装置の使用回転率(1日当たりの使用回数)を高めるかが重要な課題である。この回転率を高めるためには、1回当たりの滅菌作業時間を如何にして短縮するかが重要なポイントとなる。   In this type of steam sterilizer, an important issue is how to increase the rotation rate of the apparatus (the number of times of use per day). In order to increase the rotation rate, an important point is how to shorten the sterilization operation time per time.

この発明が解決しようとする課題は、空気排除工程に要する時間を短縮することにより、蒸気滅菌装置の使用回転率を向上させることである。   The problem to be solved by the present invention is to improve the use rotation rate of the steam sterilizer by shortening the time required for the air exclusion process.

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、被滅菌物を収容する滅菌室と、前記滅菌室への給蒸ラインに設けた給蒸手段と、前記滅菌室内の気体を排気する排気手段と、前記給蒸手段および前記排気手段を制御し、前記滅菌室内の空気を排除する空気排除工程と被滅菌物を蒸気滅菌する滅菌工程とを行う制御手段とを備え、前記空気排除工程が、前記排気手段を作動させて前記滅菌室内の気体を排出する第一操作と、前記排気手段の作動を停止させ前記給蒸手段を作動させて前記滅菌室内へ蒸気を供給する第二操作とを交互に繰り返すことで行われる蒸気滅菌装置において、前記給
蒸手段は、開度を徐々に増減して給蒸量を調整する第一制御と開度を徐々に増減することなく給蒸量を所定量,零の二値とする第二制御とを選択する構成とし、前記制御手段は、前記第二操作開始と同時または直前に前記給蒸手段を前記第二制御の所定量とすることを特徴としている。
This invention was made in order to solve the said subject, and invention of Claim 1 is a sterilization chamber which accommodates to-be-sterilized material, The steam supply means provided in the steam supply line to the said sterilization chamber, , An exhaust means for exhausting the gas in the sterilization chamber, a control for controlling the steam supply means and the exhaust means, and performing an air exclusion process for excluding air in the sterilization chamber and a sterilization process for steam sterilizing an object to be sterilized And the air exhausting step operates the exhaust means to discharge the gas in the sterilization chamber, and stops the operation of the exhaust means and operates the steam supply means to operate the sterilization chamber. In the steam sterilization apparatus that is performed by alternately repeating the second operation of supplying steam to the steaming means, the steam supply means gradually adjusts the steam supply amount by gradually increasing and decreasing the opening degree and the opening degree gradually. Specified amount of steam supply without any increase or decrease, binary value of zero Configuration and then, the control means for selecting a second control which is characterized in that the supply steam unit to the second operation start simultaneously with or shortly before a predetermined amount of the second control.

請求項1に記載の発明によれば、前記第二操作開始と同時または直前に前記給蒸手段を前記第二制御の所定量とするので、第二操作における所定圧到達までの時間を短縮でき、空気排除工程の時間短縮を行うことができる。   According to the first aspect of the present invention, since the steam supply means is set to the predetermined amount for the second control at the same time or immediately before the start of the second operation, the time until the predetermined pressure is reached in the second operation can be shortened. The time for the air removal process can be shortened.

請求項2に記載の発明は、請求項1において、前記給蒸手段は、開度が徐々に増減する給蒸バルブとこの給蒸バルブと直列に設けた開閉二値の開閉バルブとから構成し、前記第一制御が、前記開閉バルブを開き、前記給蒸バルブの開度を調整することで行われるとともに、前記第二制御が、前記給蒸バルブを予め所定開度としておき前記開閉バルブを開閉することにより行われることを特徴としている。   According to a second aspect of the present invention, in the first aspect, the steaming means comprises a steaming valve whose opening degree gradually increases and decreases and an open / close binary switching valve provided in series with the steaming valve. The first control is performed by opening the open / close valve and adjusting the opening of the steam supply valve, and the second control is performed by setting the steam supply valve to a predetermined opening in advance and opening the open / close valve. It is characterized by being performed by opening and closing.

請求項2に記載の発明によれば、請求項1に記載の発明による効果に加えて、前記滅菌室への蒸気供給遮断の効果を高めることができるという効果を奏する。   According to invention of Claim 2, in addition to the effect by the invention of Claim 1, there exists an effect that the effect of the steam supply interruption | blocking to the said sterilization chamber can be heightened.

請求項3に記載の発明は、請求項2において、前記排気手段は、前記滅菌室と接続され減圧ラインに設けた減圧バルブおよび減圧手段を含む減圧排気手段にて構成し、前記制御手段は、前記給蒸バルブを所定開度で、かつ前記開閉バルブを閉じた状態として前記減圧排気手段を作動させて、前記滅菌室内を減圧排気する前記第一操作を行い、前記減圧バルブへの閉信号と同時に前記開閉バルブを開くことにより前記滅菌室内へ蒸気を供給する前記第二操作を行うことを特徴としている。   The invention described in claim 3 is the vacuum device according to claim 2, wherein the exhaust means is constituted by a decompression means including a decompression valve and a decompression means connected to the sterilization chamber and provided in a decompression line. The first operation of evacuating the sterilization chamber is performed by operating the vacuum exhaust means with the steam supply valve at a predetermined opening and the open / close valve closed, and a closing signal to the vacuum valve At the same time, the second operation of supplying steam into the sterilization chamber is performed by opening the open / close valve.

請求項3に記載の発明によれば、請求項2に記載の発明による効果に加えて、前記減圧バルブへの閉信号と同時に前記開閉バルブを開くことにより、直ちに所定開度の前記給蒸バルブにより蒸気を供給することができ、第二操作における所定圧到達までの時間を短縮できるという効果を奏する。   According to the invention of claim 3, in addition to the effect of the invention of claim 2, the steam supply valve having a predetermined opening is immediately opened by opening the opening / closing valve simultaneously with the closing signal to the pressure reducing valve. Thus, the steam can be supplied, and the time to reach the predetermined pressure in the second operation can be shortened.

請求項4に記載の発明は、請求項3において、前記減圧バルブは、開度が徐々に増減するバルブで構成され、前記制御手段は、前記減圧バルブを閉じ始めると同時に前記開閉バルブを開くことを特徴としている。   According to a fourth aspect of the present invention, in the third aspect, the pressure reducing valve is configured by a valve whose opening degree gradually increases and decreases, and the control means opens the opening / closing valve simultaneously with starting to close the pressure reducing valve. It is characterized by.

請求項4に記載の発明によれば、請求項3に記載の発明による効果に加えて、前記減圧バルブが閉じ始めてから閉じ終わるまでの時間的ロスをなくして、所定開度の前記給蒸バルブにより蒸気を供給することができ、一層の空気排除工程の時間短縮を行うことができるという効果を奏する。   According to the invention of claim 4, in addition to the effect of the invention of claim 3, the steam supply valve having a predetermined opening degree is eliminated by eliminating a time loss from the start of closing of the pressure reducing valve to the end of closing. As a result, it is possible to supply steam, and it is possible to shorten the time of the further air exclusion process.

請求項5に記載の発明は、請求項4において、前記制御手段は、前記減圧バルブが閉じ始めるタイミングを、前記減圧バルブが閉じ終わると同時に前記減圧排気手段を停止する第一設定圧よりも所定値高い第二設定圧に前記滅菌室内圧力が到達した時点とすることを特徴としている。   According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the control means sets the timing at which the pressure reducing valve starts to be closed higher than a first set pressure at which the pressure reducing exhaust means stops at the same time as the pressure reducing valve finishes closing. It is characterized by the time when the sterilization chamber pressure has reached a high second set pressure.

請求項5に記載の発明によれば、請求項4に記載の発明による効果に加えて、前記減圧バルブの閉じ始めるタイミングを早くすることにより、第二操作における所定圧到達までの時間を一層短縮できるという効果を奏する。   According to the fifth aspect of the invention, in addition to the effect of the fourth aspect of the invention, the time to reach the predetermined pressure in the second operation is further shortened by increasing the timing at which the pressure reducing valve starts to close. There is an effect that can be done.

請求項6に記載の発明は、請求項1において、前記給蒸手段は、開度が徐々に増減する給蒸バルブとこの給蒸バルブと並列に設けた開閉二値の開閉バルブとから構成し、第一制
御が、前記開閉バルブを閉じ、前記給蒸バルブの開度を調整することで行われるとともに、第二制御が、前記開閉バルブを開閉することにより行われることを特徴としている。
A sixth aspect of the present invention is that in the first aspect, the steaming means is composed of a steaming valve whose opening degree gradually increases and decreases, and an open / close binary switching valve provided in parallel with the steaming valve. The first control is performed by closing the opening / closing valve and adjusting the opening degree of the steam supply valve, and the second control is performed by opening / closing the opening / closing valve.

請求項6に記載の発明によれば、請求項1に記載の発明による効果に加えて、前記給蒸バルブの開度を調整することで、前記開閉バルブの開時の蒸気供給量を増大させることができるという効果を奏する。   According to the sixth aspect of the invention, in addition to the effect of the first aspect of the invention, the amount of steam supplied when the open / close valve is opened is increased by adjusting the opening of the steam supply valve. There is an effect that can be.

さらに、請求項7に記載の発明は、請求項6において、前記排気手段は、前記滅菌室と接続され減圧ラインに設けた減圧バルブおよび減圧手段を含む減圧排気手段にて構成し、前記制御手段は、前記給蒸バルブを全閉で、かつ前記開閉バルブを閉じて前記減圧排気手段を作動させて、前記滅菌室内を減圧排気する前記第一操作を行い、前記減圧バルブへの閉信号と同時に前記開閉バルブを開くことにより前記滅菌室内へ蒸気を供給する前記第二操作を行うことを特徴としている。   Further, the invention according to claim 7 is the pressure control apparatus according to claim 6, wherein the exhaust means is constituted by a decompression means connected to the sterilization chamber and including a decompression valve and a decompression means provided in a decompression line, and the control means Performs the first operation of fully evacuating the sterilization chamber by closing the steam supply valve and closing the open / close valve to operate the vacuum exhaust means, and simultaneously with a close signal to the vacuum valve The second operation of supplying steam into the sterilization chamber is performed by opening the open / close valve.

請求項7に記載の発明によれば、請求項6に記載の発明による効果に加えて、前記減圧バルブへの閉信号と同時に前記開閉バルブを開くことにより、直ちに所定開度の前記給蒸バルブにより蒸気を供給することができ、第二操作における所定圧到達までの時間を短縮できるという効果を奏する。   According to the invention described in claim 7, in addition to the effect of the invention described in claim 6, the steam supply valve having a predetermined opening is immediately opened by opening the open / close valve simultaneously with the closing signal to the pressure reducing valve. Thus, the steam can be supplied, and the time to reach the predetermined pressure in the second operation can be shortened.

この発明によれば、空気排除工程の時間を短縮でき、蒸気滅菌装置の使用回転率を向上させることができる。   According to this invention, the time of an air exclusion process can be shortened and the use rotation rate of a steam sterilizer can be improved.

この発明の滅菌器の実施例1を示す概略構成図である。It is a schematic block diagram which shows Example 1 of the sterilizer of this invention. 同実施例1の要部制御手順を示すフローチャート図である。It is a flowchart figure which shows the principal part control procedure of the Example 1. 図3の要部制御手順を示すフローチャート図である。It is a flowchart figure which shows the principal part control procedure of FIG. 同実施例1の滅菌室内の圧力変化を構成要素の作動とともに模式的に説明する図である。It is a figure which illustrates typically the pressure change in the sterilization chamber of Example 1 with the action | operation of a component. この発明の他の実施例2の概略構成図である。It is a schematic block diagram of other Example 2 of this invention. この発明の他の実施例3の概略構成図である。It is a schematic block diagram of other Example 3 of this invention. 従来例の滅菌室内およびジャケット内の圧力変化を構成要素の作動とともに模式的に説明する図である。It is a figure which illustrates typically the pressure change in the sterilization room | chamber interior and jacket of a prior art example with the action | operation of a component.

この発明の実施の形態は、前記滅菌室内の被滅菌物を蒸気で滅菌する滅菌装置において実施される。   The embodiment of the present invention is implemented in a sterilization apparatus that sterilizes an object to be sterilized in the sterilization chamber with steam.

つぎに、この発明の実施の形態について説明する。この発明の実施の形態の前提となる構成につき説明する。この実施の形態の滅菌装置は、被滅菌物を収容する滅菌室と、前記滅菌室への給蒸ラインに設けた給蒸手段と、前記滅菌室内の気体を排気する排気手段と、制御手段とを備えている。前記給蒸手段は、給蒸量を制御するという意味で給蒸制御手段と称することができ、前記排気手段は、排気量を調整するという意味で排気制御手段と称することができる。   Next, an embodiment of the present invention will be described. A configuration which is a premise of the embodiment of the present invention will be described. The sterilization apparatus according to this embodiment includes a sterilization chamber for storing an object to be sterilized, steaming means provided in a steam supply line to the sterilization chamber, exhaust means for exhausting gas in the sterilization chamber, control means, It has. The steam supply means can be referred to as steam supply control means in the sense of controlling the amount of steam supply, and the exhaust means can be referred to as exhaust control means in the sense of adjusting the amount of exhaust.

前記制御手段は、前記給蒸手段および前記排気手段を制御し、前記滅菌室内の空気を排除する空気排除工程と被滅菌物を蒸気滅菌する滅菌工程とを行うものである。前記空気排除工程は、前記排気手段を作動させて前記滅菌室内の気体を排出する第一操作と、前記排気手段の作動を停止させるとともに、前記給蒸手段を作動させて滅菌室内へ蒸気を供給する第二操作とを交互に繰り返すように構成される。第一操作と第二操作とはその順序を入
れ替えても良い。第一操作は、第一ステップまたは蒸気排出操作と称することができ、第二操作は、第二ステップまたは蒸気供給操作と称することができる。
The control means controls the steam supply means and the exhaust means, and performs an air exclusion process for excluding air in the sterilization chamber and a sterilization process for steam sterilizing an object to be sterilized. In the air exclusion step, the exhaust means is operated to discharge the gas in the sterilization chamber, the exhaust means is stopped, and the steam supply means is operated to supply steam into the sterilization chamber. The second operation is configured to be repeated alternately. The order of the first operation and the second operation may be interchanged. The first operation can be referred to as a first step or a steam discharge operation, and the second operation can be referred to as a second step or a steam supply operation.

この実施の形態の特徴とする構成は、主としてつぎの二つである。第一の特徴は、前記給蒸手段を、開度を徐々に増減して給蒸量を調整する第一制御と開度を徐々に増減することなく給蒸量を所定量,零の二値とする第二制御とを選択する構成とした点である。第二の特徴は、前記制御手段により、前記第二操作開始と同時またはその直前に前記給蒸手段を前記第二制御として給蒸量を所定量に制御とする構成である。前記「所定量」は、好ましくは、前記給蒸ラインを通して供給可能な最大量であるが、最大量より少ない蒸気供給量を含むものである。   The main features of this embodiment are the following two. The first feature is that the steam supply means is a first control that adjusts the steam supply amount by gradually increasing and decreasing the opening degree, and the steam supply amount is a predetermined amount and zero binary without gradually increasing or decreasing the opening degree. The second control is to select the second control. The second feature is that the control unit controls the steam supply amount to a predetermined amount by using the steam supply unit as the second control at the same time or immediately before the start of the second operation. The “predetermined amount” is preferably the maximum amount that can be supplied through the steam supply line, but includes a steam supply amount smaller than the maximum amount.

こうした構成により、前記第二操作が開始されると、蒸気供給量を所定量にして前記滅菌室内ヘ蒸気が供給される。その結果、第二操作における所定圧到達までの時間を短縮でき、空気排除工程に要する時間を短縮することができる。   With this configuration, when the second operation is started, the steam is supplied to the sterilization chamber with a predetermined steam supply amount. As a result, the time required to reach the predetermined pressure in the second operation can be shortened, and the time required for the air exclusion process can be shortened.

前記給蒸手段は、つぎの二つの形態を含む。
(給蒸手段の第一の形態)
第一の形態は、開度が徐々に増減する給蒸バルブとこの給蒸バルブと直列に設けた開閉二値の開閉バルブとから構成する。そして、前記第一制御が、前記開閉バルブを開き、前記給蒸バルブの開度を調整することで行われるとともに、前記第二制御が、前記給蒸バルブを予め所定開度としておき前記開閉バルブを開閉することにより行われる形態である。この第一の形態の給蒸手段および後述の第二の形態の給蒸手段は、前記給蒸バルブと前記開閉バルブとを一体的に構成したバルブとすることができる。前記「所定開度」は、好ましくは、全開であるが、全開より少ない開度を含むものである。
The steam supply means includes the following two forms.
(First form of steaming means)
The first form is composed of a steam supply valve whose opening degree is gradually increased and decreased and a binary open / close valve provided in series with the steam supply valve. The first control is performed by opening the open / close valve and adjusting the opening of the steam supply valve, and the second control is performed by setting the steam supply valve to a predetermined opening in advance and opening / closing the valve. It is the form performed by opening and closing. The steam supply means of the first form and the steam supply means of the second form which will be described later can be a valve in which the steam supply valve and the opening / closing valve are integrally configured. The “predetermined opening” is preferably fully opened, but includes an opening smaller than the fully opened.

この第一の形態においては、前記制御手段は、予め前記給蒸バルブを所定開度としておき、前記第二操作開始と同時またはその直前に前記開閉バルブを開くことにより、前記給蒸手段を前記第二制御として給蒸量を所定量とする。   In this first embodiment, the control means sets the steam supply valve to a predetermined opening degree in advance, and opens the open / close valve at the same time as or immediately before the start of the second operation, thereby causing the steam supply means to As the second control, the steam supply amount is set to a predetermined amount.

この給蒸手段の第一の形態および後述の第二の形態において、前記給蒸バルブは、モータバルブなどの比例バルブが用いられ、開指令信号を受けて完全閉位置から完全開位置または所定開度位置となるまでに、また閉指令信号を受けて完全開位置または所定開度位置から完全閉位置となるまでに、所定の時間を要するバルブである。前記開閉バルブは、開閉二値の電磁バルブであり、開閉は比例バルブと比較して瞬時に行われ、遮断バルブと称することができる。   In the first form of the steam supply means and the second form to be described later, the steam supply valve is a proportional valve such as a motor valve, and receives an open command signal from a fully closed position to a fully open position or a predetermined open position. It is a valve that takes a predetermined time until it reaches the fully closed position, and after receiving the close command signal, it reaches the fully closed position or the fully closed position from the predetermined opening position. The open / close valve is an open / close binary electromagnetic valve, and the open / close is instantaneously performed as compared with the proportional valve, and can be referred to as a cutoff valve.

この前記給蒸手段の第一の形態において、前記空気排除工程は、つぎの二つの形態を含む。この空気排除工程の第一の形態は、好ましい形態であって、減圧排気と給蒸を繰り返すことにより空気を排除する減圧排気・給蒸方式である。すなわち、この第一の形態では、前記排気手段が前記滅菌室と接続され減圧ラインに設けた減圧バルブおよび減圧手段を含む減圧排気手段にて構成される。前記減圧手段と前記減圧バルブは互いに直列に接続される。前記空気排除工程が、前記減圧バルブを開き前記減圧排気手段を作動させて前記滅菌室内の空気を排出する第一操作と、前記減圧バルブを閉じ前記減圧排気手段の作動を停止させ、前記開閉バルブおよび前記給蒸バルブを開いて前記滅菌室内へ蒸気を供給する第二操作とを交互に繰り返すように構成される。そして、前記制御手段は、前記給蒸バルブを所定開度で、かつ前記開閉バルブを閉じた状態として前記減圧手段を作動させて、前記滅菌室内を減圧排気する前記第一操作を行い、前記減圧バルブへの閉信号と同時に前記開閉バルブを開くことにより前記滅菌室内へ蒸気を供給する前記第二操作を行うように構成される。   In the first form of the steam supply means, the air exclusion step includes the following two forms. The first form of the air exclusion process is a preferred form, and is a reduced pressure exhaust / steaming system that excludes air by repeating reduced pressure exhaust and steam supply. That is, in the first embodiment, the exhaust means is constituted by a decompression means including a decompression valve and a decompression means connected to the sterilization chamber and provided in a decompression line. The pressure reducing means and the pressure reducing valve are connected in series with each other. The air exhausting step opens the decompression valve to activate the decompression exhaust means to exhaust the air in the sterilization chamber; closes the decompression valve to stop the decompression exhaust means; And a second operation of opening the steam supply valve and supplying steam into the sterilization chamber is repeated alternately. The control means performs the first operation of evacuating the sterilization chamber by operating the decompression means with the steam supply valve at a predetermined opening and the open / close valve closed, and performing the decompression. The second operation of supplying steam into the sterilization chamber is performed by opening the open / close valve simultaneously with a closing signal to the valve.

前記第二操作は、前記滅菌室内の圧力が所定圧となるまで行われる。この所定圧は、好ましくは大気圧であるが、大気圧より低くても高くてもよい。   The second operation is performed until the pressure in the sterilization chamber reaches a predetermined pressure. The predetermined pressure is preferably atmospheric pressure, but may be lower or higher than atmospheric pressure.

この空気排除工程の第一の形態において、前記減圧バルブは、前記給蒸バルブと同様に開度が徐々に増減するバルブで構成され、前記制御手段は、前記減圧バルブを閉じ始めると同時に前記開閉バルブを開くように構成することができる。こうした構成により、滅菌工程終了後の乾燥工程において、前記減圧バルブを開いて、前記減圧排気手段を作動させて被滅菌物の乾燥を行う場合に、前記滅菌室内の減圧度合いを調整することができる。そして、従来の前記減圧バルブが開き始めてから閉じ終わるまでの時間的ロスをなくして、前記減圧バルブが開き始めると同時に、蒸気供給量を所定量として蒸気を供給することができ、一層の空気排除工程の時間短縮を行うことができる。前記第一の形態において、前記減圧バルブは、開閉のみで、開度調整ができない開閉バルブとすることもできる。前記減圧バルブは、前記滅菌室内の真空度合いを調整する機能を有するので真空バルブと称することができる。   In the first form of the air exclusion process, the pressure reducing valve is configured by a valve whose opening degree gradually increases and decreases like the steam supply valve, and the control means starts opening and closing the pressure reducing valve at the same time as opening and closing. The valve can be configured to open. With such a configuration, in the drying process after the sterilization process is completed, when the object to be sterilized is dried by opening the decompression valve and operating the decompression exhaust means, the degree of decompression in the sterilization chamber can be adjusted. . And, the conventional pressure reducing valve can be supplied with a predetermined amount of steam at the same time that the pressure reducing valve starts to open and eliminates time loss from the time when the pressure reducing valve starts to close to the end. The process time can be shortened. In the first embodiment, the pressure reducing valve may be an open / close valve that cannot be adjusted only by opening and closing. Since the pressure reducing valve has a function of adjusting the degree of vacuum in the sterilization chamber, it can be referred to as a vacuum valve.

さらに、この空気排除工程の第一の形態において、好ましくは、前記減圧バルブが閉じ始めるタイミングを、前記減圧バルブが閉じ終わる第一設定圧よりも所定値高い第二設定圧に、前記滅菌室内圧力が到達した時点とする。前記減圧バルブが閉じ終わると前記減圧排気手段の作動を停止する。この構成によれば、前記減圧バルブの閉じ始めるタイミングを早くしているので、第二操作における大気圧到達までの時間を一層短縮できる。   Further, in the first form of the air exclusion step, preferably, the pressure in the sterilization chamber is set to a second set pressure higher than a first set pressure at which the pressure reducing valve starts to close by a predetermined value than the first set pressure at which the pressure reducing valve ends. Is the point of arrival. When the pressure reducing valve is closed, the operation of the pressure reducing exhaust means is stopped. According to this configuration, since the timing at which the pressure reducing valve starts to close is advanced, the time until the atmospheric pressure is reached in the second operation can be further shortened.

前記減圧排気手段は、開閉二値の減圧バルブと減圧手段から構成される場合には、前記減圧手段が作動されるとき、前記減圧バルブが開き、前記減圧手段が作動停止されるとき、前記減圧バルブが閉じる。前記減圧手段は、好ましくは、真空ポンプとするが、これに限定されるものではなく、エゼクタなどの減圧装置とすることができる。   When the decompression means is composed of an open / close binary decompression valve and a decompression means, when the decompression means is operated, the decompression valve opens and when the decompression means is deactivated, the decompression means The valve closes. The decompression unit is preferably a vacuum pump, but is not limited thereto, and may be a decompression device such as an ejector.

また、前記滅菌室と接続される排気バルブを設け、この空気排除工程の第一の形態において、この排気バルブを開いた状態で前記第一操作の前に蒸気を供給して、前記滅菌室内の空気を排出する第三操作を前記第一操作の前に行うように構成することができる。   In addition, an exhaust valve connected to the sterilization chamber is provided, and in the first form of the air exclusion process, steam is supplied before the first operation with the exhaust valve opened, A third operation for discharging air can be performed before the first operation.

前記空気排除工程の第二の形態は、正圧給蒸と排気とを繰り返すことにより空気を排除する正圧給蒸・排気方式である。すなわち、この第二の形態では、前記排気手段が、前記滅菌室からの排気ラインに設けた排気バルブにて構成される。そして、前記空気排除工程が、前記排気バルブを開き前記滅菌室内の気体を排出する第一操作と、前記排気バルブを閉じ、前記開閉バルブおよび前記給蒸バルブを開いて前記滅菌室内へ蒸気を供給する第二操作とを交互に繰り返すように構成される。   The second form of the air exclusion process is a positive pressure steaming / exhaust system that excludes air by repeating positive pressure steaming and exhaust. That is, in the second embodiment, the exhaust means is constituted by an exhaust valve provided in an exhaust line from the sterilization chamber. The air exhausting step opens the exhaust valve to discharge the gas in the sterilization chamber, closes the exhaust valve, opens the open / close valve and the steam supply valve, and supplies steam into the sterilization chamber. The second operation is configured to be repeated alternately.

そして、前記制御手段は、前記給蒸バルブを全閉状態で、かつ前記開閉バルブを閉じた状態として前記排気バルブを開いて前記滅菌室内の気体を排気する前記第一操作を行い、前記排気バルブへの閉信号と同時に前記開閉バルブを開くことにより前記滅菌室内へ蒸気を供給する前記第二操作を行うように構成される。この第二の形態では、通常最初に第二操作が行われ、その後に第一操作が行われる。この第二の形態の空気排除は、特開平9−266943号公報などにて公知の空気排除方式である。この第二の形態においては、一般的に前記減圧排気手段は作動されない。   The control means performs the first operation of exhausting the gas in the sterilization chamber by opening the exhaust valve with the steam supply valve fully closed and the open / close valve closed. The second operation of supplying steam into the sterilization chamber is performed by opening the open / close valve simultaneously with the closing signal to the sterilization chamber. In this second form, the second operation is usually performed first, followed by the first operation. This second form of air evacuation is a known air evacuation system disclosed in Japanese Patent Application Laid-Open No. 9-266943. In the second embodiment, generally, the vacuum exhaust means is not operated.

この空気排除工程の第二の形態においても、前記空気排除工程の第一の形態と同様に、前記開閉バルブを開くと、前記給蒸バルブが所定開度となっているので、蒸気供給量を所定量にして前記滅菌室内ヘ蒸気が供給され、第二操作における所定圧到達までの時間を短縮でき、空気排除工程に要する時間を短縮することができる。この所定圧は、大気圧より高い正圧とする。   Also in the second form of the air exclusion process, similarly to the first form of the air exclusion process, when the opening / closing valve is opened, the steam supply valve has a predetermined opening, so the steam supply amount is reduced. Steam is supplied to the sterilization chamber in a predetermined amount, so that the time until the predetermined pressure is reached in the second operation can be shortened, and the time required for the air exclusion process can be shortened. This predetermined pressure is a positive pressure higher than the atmospheric pressure.

この空気排除工程の第二の形態においては、前述のように、前記給蒸バルブおよび前記開閉バルブは、前記滅菌室に接続される給蒸ラインに互いに直列に設けられる。前記開閉バルブは、好ましくは、前記給蒸バルブの一次側(上流側)に設ける。その理由は、前記開閉バルブを前記給蒸バルブの二次側に設けた場合、給蒸していないときには、前記給蒸バルブから前記開閉バルブまでの間が蒸気で満たされており、時間とともに放熱するため、一部蒸気が水になる。すると、滅菌工程後の後の乾燥工程における乾燥に若干の影響があると考えられるからである。   In the second form of the air exclusion process, as described above, the steam supply valve and the opening / closing valve are provided in series with each other on the steam supply line connected to the sterilization chamber. The opening / closing valve is preferably provided on the primary side (upstream side) of the steam supply valve. The reason is that when the open / close valve is provided on the secondary side of the steam supply valve, when the steam is not supplied, the steam from the steam supply valve to the open / close valve is filled with steam and radiates heat over time. Therefore, some steam becomes water. Then, it is because it is thought that there is some influence on the drying in the drying process after the sterilization process.

前記給蒸バルブおよび前記開閉バルブを設ける給蒸ラインには、前記滅菌室の外側に設ける給蒸空間を含ませることができる。すなわち、この給蒸ラインは、前記滅菌室に連通する前記開閉バルブを設けた給蒸ライン−前記給蒸空間−前記給蒸空間と前記滅菌室とを連通する前記給蒸バルブを設けた給蒸ラインにより構成される。   The steam supply line provided with the steam supply valve and the opening / closing valve may include a steam supply space provided outside the sterilization chamber. That is, this steam supply line is a steam supply line provided with the open / close valve communicating with the sterilization chamber, the steam supply space, the steam supply valve provided with the steam supply valve communicating with the steam supply space and the sterilization chamber. Consists of lines.

前記給蒸空間は、前記滅菌室の外壁を加熱するように設けられ、好ましくは、前記滅菌室の外壁を覆うように包囲壁を設けて、前記外壁と前記包囲壁との間に形成した空間(ジャケットと称することができる。)とするが、前記滅菌室の外壁に沿って配置する伝熱管で構成することもできる。また、この実施の形態では、前記滅菌室の保温が効果的に行われるのであれば、前記給蒸空間は必ずしも必要としない。   The steaming space is provided so as to heat the outer wall of the sterilization chamber, and preferably a space formed between the outer wall and the surrounding wall by providing an enclosing wall so as to cover the outer wall of the sterilizing chamber. (It can also be referred to as a jacket.) However, it can also be constituted by a heat transfer tube arranged along the outer wall of the sterilization chamber. In this embodiment, the steaming space is not necessarily required if the sterilization chamber is effectively kept warm.

(給蒸手段の第二の形態)
前記給蒸手段の第二の形態は、開度が徐々に増減する給蒸バルブとこの給蒸バルブと並列に設けた開閉二値の開閉バルブとから構成する。そして、第一制御が、前記開閉バルブを閉じ、前記給蒸バルブの開度を調整することで行われるとともに、第二制御が、前記開閉バルブを開閉することにより行われる形態である。この給蒸手段の第二の形態においては、前記制御手段は、前記第二操作開始と同時またはその直前に前記開閉バルブを開くことにより、前記給蒸手段を前記第二制御として給蒸量を所定量とする。前記第二操作において、前記給蒸バルブを全閉でなく、所定開度または全開とすることにより、前記第二操作における給蒸量を増加させる,すなわち前記第二制御の所定量を増大させることができる。
(Second form of steaming means)
The second form of the steam supply means is composed of a steam supply valve whose opening degree gradually increases and decreases and a binary open / close valve provided in parallel with the steam supply valve. The first control is performed by closing the opening / closing valve and adjusting the opening of the steam supply valve, and the second control is performed by opening / closing the opening / closing valve. In the second form of the steam supply means, the control means opens the open / close valve at the same time as or immediately before the start of the second operation, thereby setting the steam supply amount as the second control. A predetermined amount. In the second operation, the steam supply valve in the second operation is increased by increasing the steam supply amount in the second operation by setting the steam supply valve not to be fully closed but to a predetermined opening or full open. Can do.

この給蒸手段の第二の形態においても、前記空気排除工程は、前記給蒸手段の第一の形態と同様に、前記減圧排気・給蒸方式と前記正圧給蒸・排気方式の二つの態様を含む。その構成は、前記給蒸手段の第一の形態と同様であるので、その説明を省略する。   Also in the second form of the steaming means, the air exhausting step is performed in the same manner as in the first form of the steaming means. The vacuum exhausting / steaming method and the positive pressure steaming / exhaust method are the same. Including embodiments. Since the configuration is the same as that of the first embodiment of the steam supply means, the description thereof is omitted.

つぎに、この実施の形態の構成要素について未説明のものについて説明する。前記滅菌室は、処理槽と称することができ、被滅菌物が収容されて滅菌処理される密閉可能な中空容器であり、扉を介して被滅菌物が出し入れされる。   Next, unexplained components of this embodiment will be described. The sterilization chamber can be referred to as a processing tank, and is a hermetically sealed hollow container in which an object to be sterilized is stored and sterilized, and the object to be sterilized is taken in and out through a door.

前記制御手段は、CPUと記憶手段とを含んで構成され、前記給蒸手段,前記排気手段を制御し、少なくとも前記滅菌室内の空気を排除する空気排除工程と被滅菌物を蒸気滅菌する滅菌工程とを行うように構成される。空気排除工程と滅菌工程との間には、給蒸工程が設けられるが、この給蒸工程は、空気排除工程,滅菌工程のいずれか一方に含ませることができる。また、滅菌工程の後には、通常被滅菌物を乾燥させる乾燥工程を行う。   The control means includes a CPU and a storage means, and controls the steam supply means and the exhaust means to eliminate at least air in the sterilization chamber and sterilization process to sterilize an object to be sterilized. And is configured to do A steaming process is provided between the air exclusion process and the sterilization process, and this steaming process can be included in either the air exclusion process or the sterilization process. In addition, after the sterilization process, a drying process is usually performed to dry the article to be sterilized.

以下、この発明の実施例1の滅菌装置について、図面に基づいて説明する。図1は、同実施例1の概略構成図であり、図2は、同実施例1の制御手順を説明するフローチャート図であり、図3は、図2の要部の制御手順を説明するフローチャート図であり、図4は、同実施例1の滅菌室内の圧力変化と、同実施例1の構成要素の作動との関係を説明する図
である。
Hereinafter, the sterilization apparatus of Example 1 of this invention is demonstrated based on drawing. FIG. 1 is a schematic configuration diagram of the first embodiment, FIG. 2 is a flowchart illustrating a control procedure of the first embodiment, and FIG. 3 is a flowchart illustrating a control procedure of a main part of FIG. FIG. 4 is a diagram for explaining the relationship between the pressure change in the sterilization chamber of the first embodiment and the operation of the components of the first embodiment.

(実施例1の構成)
図1において、滅菌室1の外壁には給蒸空間としての二重缶状に形成した蒸気ジャケット2が設けられ、前記滅菌室1を外側から加熱するようになっている。
(Configuration of Example 1)
In FIG. 1, a steam jacket 2 formed in a double can shape as a steam supply space is provided on the outer wall of the sterilization chamber 1, and the sterilization chamber 1 is heated from the outside.

前記滅菌室1には、この滅菌室1と連通するように第一給蒸ライン(蒸気供給ライン)3が接続され、前記蒸気ジャケット2には、この蒸気ジャケット2と連通するように第二給蒸ライン4が接続される。前記第一、第二給蒸ライン3、4には、それぞれ給蒸手段としての第一、第二給蒸バルブ5,6が設けられる。   A first steam supply line (steam supply line) 3 is connected to the sterilization chamber 1 so as to communicate with the sterilization chamber 1, and a second supply is connected to the steam jacket 2 so as to communicate with the steam jacket 2. A steam line 4 is connected. The first and second steam supply lines 3 and 4 are respectively provided with first and second steam supply valves 5 and 6 as steam supply means.

前記第一給蒸ライン3には、全閉と全開とに二位置制御される開閉バルブ7が第一給蒸バルブ5の一次側(上流側)に直列に設けられる。この第一給蒸バルブ5と開閉バルブ7とで、この発明の給蒸手段を構成している。この実施例1では、開度が徐々に増減する前記第一給蒸バルブ5として、前記滅菌室1内の温度を安定させ滅菌品質を高めるために比例制御バルブであるモータバルブを用い、前記開閉バルブ7および前記第二給蒸バルブ6として、作動レスポンスが速く、コストが安い開と閉を選択する電磁バルブを用いている。   The first steam supply line 3 is provided with an open / close valve 7 that is controlled in two positions, fully closed and fully open, in series on the primary side (upstream side) of the first steam supply valve 5. The first steam supply valve 5 and the opening / closing valve 7 constitute the steam supply means of the present invention. In the first embodiment, a motor valve, which is a proportional control valve, is used to stabilize the temperature in the sterilization chamber 1 and improve the sterilization quality as the first steam supply valve 5 whose opening degree gradually increases and decreases. As the valve 7 and the second steam supply valve 6, an electromagnetic valve that selects opening and closing is used, which has a quick operation response and low cost.

前記滅菌室1には給気ライン8が接続され、減圧された前記滅菌室1内へ無菌空気が供給されて、前記滅菌室1内が大気圧まで復圧されるようになっている。前記給気ライン8には、上流側より順に無菌フィルタ9および給気バルブ10が設けられている。この給気バルブ10は、開度開閉二値の電磁弁を用いている。   An air supply line 8 is connected to the sterilization chamber 1, and aseptic air is supplied into the sterilized chamber 1 whose pressure has been reduced, so that the inside of the sterilization chamber 1 is restored to atmospheric pressure. The air supply line 8 is provided with a sterile filter 9 and an air supply valve 10 in order from the upstream side. The air supply valve 10 uses a solenoid valve having an opening / closing binary value.

また、前記滅菌室1には減圧ライン11が接続され、前記滅菌室1内の気体が減圧により排気されるようになっている。前記減圧ライン11には、上流側より順に減圧バルブ12および真空ポンプ13が設けられている。この減圧バルブ12と真空ポンプ13とでこの発明の排気手段である減圧排気手段を構成している。   The sterilization chamber 1 is connected to a decompression line 11 so that the gas in the sterilization chamber 1 is exhausted by decompression. The decompression line 11 is provided with a decompression valve 12 and a vacuum pump 13 in order from the upstream side. The decompression valve 12 and the vacuum pump 13 constitute a decompression exhaust means that is an exhaust means of the present invention.

そして、排気ライン14が、前記減圧ライン11における前記減圧バルブ12の上流位置から分岐して設けられ、その下流端が前記減圧ライン11における前記真空ポンプ13の下流位置に接続されている。前記排気ライン14は、前記滅菌室1内の蒸気を排出する作用をなす。前記排気ライン14には、排気バルブ15が設けられている。   An exhaust line 14 is branched from the upstream position of the decompression valve 12 in the decompression line 11, and its downstream end is connected to a downstream position of the vacuum pump 13 in the decompression line 11. The exhaust line 14 serves to discharge the steam in the sterilization chamber 1. The exhaust line 14 is provided with an exhaust valve 15.

前記減圧バルブ12は、徐々に増減する比例制御バルブとしてのモータバルブを用い、前記排気バルブ15は、全閉と全開とに二位置制御されるバルブを用いている。前記減圧バルブ12は、滅菌工程後の乾燥工程において、前記真空ポンプ13を駆動しつつ開度を調整することにより、減圧度合いを調整するように制御される。   The pressure reducing valve 12 uses a motor valve as a proportional control valve that gradually increases and decreases, and the exhaust valve 15 uses a valve that is controlled in two positions, fully closed and fully opened. The decompression valve 12 is controlled to adjust the degree of decompression by adjusting the opening while driving the vacuum pump 13 in the drying process after the sterilization process.

前記滅菌室1および蒸気ジャケット2にはそれぞれの内部圧力を検出する圧力検出手段としての第一、第二圧力センサ16、17が設けられ、前記減圧ライン11の前記滅菌室1内に連通するドレン排出口と称される部分に温度センサ18が設けられている。この温度センサ18の取付け位置は、前記滅菌室1及びこれに連通する部位で最も低い温度を検出すべく選んでいる。   The sterilization chamber 1 and the steam jacket 2 are provided with first and second pressure sensors 16 and 17 as pressure detecting means for detecting respective internal pressures, and drains communicating with the sterilization chamber 1 of the decompression line 11 are provided. A temperature sensor 18 is provided at a portion called a discharge port. The mounting position of the temperature sensor 18 is selected so as to detect the lowest temperature in the sterilization chamber 1 and a portion communicating with the sterilization chamber 1.

前記第一、第二圧力センサ16、17および前記温度センサ18は、信号線により制御器19に接続されている。この制御器19は、予め設定された制御手順にしたがい、前記第一、第二給蒸バルブ5、6、前記開閉バルブ7、前記給気バルブ10、前記減圧バルブ12および前記排気バルブ15の開閉や、前記真空ポンプ13の運転を制御する。   The first and second pressure sensors 16, 17 and the temperature sensor 18 are connected to a controller 19 by signal lines. The controller 19 opens and closes the first and second steam supply valves 5 and 6, the opening and closing valve 7, the air supply valve 10, the pressure reducing valve 12, and the exhaust valve 15 in accordance with a preset control procedure. In addition, the operation of the vacuum pump 13 is controlled.

前記制御手順は、図2に示すように、予備工程S1,空気排除工程S2,給蒸工程S3,滅菌工程S4および乾燥工程S5を順次実行するように構成されている。   As shown in FIG. 2, the control procedure is configured to sequentially execute a preliminary process S1, an air exclusion process S2, a steaming process S3, a sterilization process S4, and a drying process S5.

前記空気排除工程S2は、第一操作W1と第二操作W2とが繰り返し行われる。前記第一操作W1は、前記第一給蒸バルブ5を全閉で、かつ前記開閉バルブ7を閉じた状態として前記真空ポンプ13を作動させて、前記滅菌室1内を減圧排気するものである。前記第二操作W2は、前記第一給蒸バルブ5全開するとともに前記開閉バルブ7を開くことにより前記滅菌室内へ蒸気を供給するものである。そして、前記第二操作W2開始の直前に(同時でもよい)前記第一給蒸バルブ5を全開にしておき、前記第二操作W2開始時には、前記第一給蒸ライン3を通して供給可能な最大の蒸気量を供給するように構成している。   In the air exclusion step S2, the first operation W1 and the second operation W2 are repeatedly performed. The first operation W1 is to evacuate the inside of the sterilization chamber 1 by operating the vacuum pump 13 with the first steam supply valve 5 fully closed and the open / close valve 7 closed. . The second operation W2 is to supply steam into the sterilization chamber by fully opening the first steam supply valve 5 and opening the opening / closing valve 7. Then, the first steam supply valve 5 is fully opened immediately before the start of the second operation W2 (or at the same time), and at the start of the second operation W2, the maximum supply possible through the first steam supply line 3 is performed. It is configured to supply steam.

この実施例1では、前記第一操作−前記第二操作−前記第一操作が行われる。そして、最初の第一操作W1の前で、排気バルブを開いた状態で前記第一操作の前に蒸気を供給して、前記滅菌室内の空気を排出する第三操作W3を行うように構成している。具体的には、前記空気排除工程S2の手順は、図3に示され、その詳細は、この実施例1の動作とともに後述する。   In the first embodiment, the first operation-the second operation-the first operation is performed. Then, before the first first operation W1, a third operation W3 is performed in which the steam is supplied before the first operation with the exhaust valve opened, and the air in the sterilization chamber is discharged. ing. Specifically, the procedure of the air exclusion step S2 is shown in FIG. 3, and details thereof will be described later together with the operation of the first embodiment.

(実施例1の動作)
以上の構成の実施例1の動作を運転工程に従い以下に説明する。図2を参照して、前記運転工程は、予備工程S1、空気排除工程S2、給蒸工程S3、滅菌工程S4および乾燥工程S5の各工程からなっている。
(Operation of Example 1)
The operation of the first embodiment having the above configuration will be described below in accordance with the operation process. Referring to FIG. 2, the operation process includes a preliminary process S1, an air exclusion process S2, a steam supply process S3, a sterilization process S4, and a drying process S5.

(予備工程)
S1では、被滅菌物を前記滅菌室1内に収納した後、前記第二給蒸バルブ6を開いて、前記蒸気ジャケット2内に蒸気を供給して、前記滅菌室1を加温する予備工程を行う。この予備工程は、前記温度センサ18により検出する前記滅菌室1内の温度が所定温度に達するように所定時間行われる。この予備工程において、前記第二圧力センサ17により検出する圧力により前記第二給蒸バルブ6を制御して、前記蒸気ジャケット2内を第一設定値となるように制御する。
(Preliminary process)
In S <b> 1, a preliminary process of heating the sterilization chamber 1 by storing the sterilization object in the sterilization chamber 1, opening the second steam supply valve 6, supplying steam into the steam jacket 2, and so on. I do. This preliminary process is performed for a predetermined time so that the temperature in the sterilization chamber 1 detected by the temperature sensor 18 reaches a predetermined temperature. In this preliminary step, the second steam supply valve 6 is controlled by the pressure detected by the second pressure sensor 17, and the inside of the steam jacket 2 is controlled to be the first set value.

(空気排除工程)
つぎに、S2では、空気排除工程が行われるが、これを図3および図4に基づき説明する。まず、S6において、前記制御器19は、前記開閉バルブ7および前記第一給蒸バルブ5に対して開信号を,前記排気バルブ15に対して開信号を,前記真空ポンプ13に対して駆動停止信号を,前記減圧バルブ12に対して閉信号をそれぞれ送信する。前記給気バルブ10は、空気排除工程中ずっと閉じられる。
(Air exclusion process)
Next, in S2, an air exclusion process is performed, which will be described with reference to FIGS. First, in S6, the controller 19 stops the opening signal for the opening / closing valve 7 and the first steam supply valve 5, the opening signal for the exhaust valve 15, and the driving stop for the vacuum pump 13. A signal is sent to the pressure reducing valve 12 as a closing signal. The air supply valve 10 is closed throughout the air evacuation process.

すると、前記第一給蒸バルブ5が徐々に開き始め、前記第一給蒸ライン3を通して大気圧以上の飽和蒸気(以下、単に蒸気という。)が前記滅菌室1内へ供給される。その結果、前記滅菌室1内の空気は蒸気とともに、前記排気ライン14を通して、排出される。これが、前記第三操作W3であり、この第三操作W3は、予め設定した所定時間だけ行われ、S7でYESが判定されると、S8へ移行する。   Then, the first steam supply valve 5 begins to open gradually, and saturated steam (hereinafter simply referred to as steam) of atmospheric pressure or higher is supplied into the sterilization chamber 1 through the first steam supply line 3. As a result, the air in the sterilization chamber 1 is discharged through the exhaust line 14 together with the steam. This is the third operation W3. This third operation W3 is performed for a predetermined time set in advance, and if YES is determined in S7, the process proceeds to S8.

S8では、前記制御器19は、前記第一給蒸バルブ5を全開としたままで、前記開閉バルブ7に対して閉信号を,前記減圧バルブ12に対して開信号を,前記排気バルブ15に対して閉信号を,前記真空ポンプ13に対して駆動信号をそれぞれ送信する。   In S8, the controller 19 keeps the first steam supply valve 5 fully open, sends a close signal to the open / close valve 7, an open signal to the decompression valve 12, and an exhaust valve 15 to the exhaust valve 15. On the other hand, a close signal and a drive signal are transmitted to the vacuum pump 13, respectively.

すると、前記減圧ライン11を通して前記滅菌室1内が減圧排気され、前記滅菌室1内の空気および被滅菌物に含まれる空気が前記滅菌室1外へ排出される。これが前記第一操作W1であるが、この第一操作W1により、前記滅菌室1内の圧力は、図4に示すように
徐々に低下してゆく。
Then, the inside of the sterilization chamber 1 is evacuated and exhausted through the decompression line 11, and the air in the sterilization chamber 1 and the air contained in the sterilized material are discharged out of the sterilization chamber 1. This is the first operation W1. By this first operation W1, the pressure in the sterilization chamber 1 gradually decreases as shown in FIG.

そして、前記滅菌室1内圧力(前記第一圧力センサ16の検出圧力)が、前記減圧バルブ8が閉じ終わる(完全閉の)第一設定圧P1よりも所定値高い第二設定圧P2に到達すると、S9にてYESが判定され、処理は、S10へ移行する。   Then, the pressure in the sterilization chamber 1 (the pressure detected by the first pressure sensor 16) reaches the second set pressure P2 that is higher than the first set pressure P1 by which the pressure reducing valve 8 finishes closing (fully closed). Then, YES is determined in S9, and the process proceeds to S10.

S10では、前記制御器19は、前記第一給蒸バルブ5を全開としたままで、前記開閉バルブ7に対して開信号を,前記減圧バルブ12に対して閉信号を,前記排気バルブ15に対してそのまま閉信号を,前記真空ポンプ13に対して駆動信号をそれぞれ送信する。そして、前記減圧バルブ12が閉じ終わると、S11にてYESが判定され、前記真空ポンプ13が駆動停止される。   In S10, the controller 19 keeps the first steam supply valve 5 fully open, sends an open signal to the open / close valve 7, a close signal to the pressure reducing valve 12, and an exhaust valve 15 to the exhaust valve 15. On the other hand, a close signal is transmitted as it is, and a drive signal is transmitted to the vacuum pump 13. Then, when the pressure reducing valve 12 is closed, YES is determined in S11, and the vacuum pump 13 is stopped.

その結果、前記滅菌室1内の圧力は、図4に示すように、前記減圧バルブ12への閉信号供給から若干下がった後、上昇してゆく。前記滅菌室1内の圧力が所定圧である大気圧よりも所定値低い第三設定値P3に到達すると、S13にてYESが判定され、S14にて前記減圧バルブ12に対し、開信号を送る。これは、つぎの第一操作W1の開始時に前記減圧バルブ12の開放を完了させておくためである。ついで、前記滅菌室1内の圧力が大気圧となると、S15においてYESが判定され、処理は、S16へ移行する。   As a result, as shown in FIG. 4, the pressure in the sterilization chamber 1 rises after being slightly lowered from the supply of the closed signal to the pressure reducing valve 12. When the pressure in the sterilization chamber 1 reaches the third set value P3 that is lower than the predetermined atmospheric pressure, YES is determined in S13, and an open signal is sent to the pressure reducing valve 12 in S14. . This is because the opening of the pressure reducing valve 12 is completed at the start of the next first operation W1. Next, when the pressure in the sterilization chamber 1 becomes atmospheric pressure, YES is determined in S15, and the process proceeds to S16.

S16では、前記制御器19は、前記第一操作W1および前記第二操作W2の繰り返しが設定N回数行われたかどうかを判定する。この実施例1では、前記第一操作W1が2回完了したかどうかを判定する。S16で、NOが判定されると、S8へ戻り、前記第一操作W1および前記第二操作W2が再度実行される。S16で、YESが判定されると、空気排除工程S2を終了して、つぎの給蒸工程S3へ移行する。   In S16, the controller 19 determines whether or not the repetition of the first operation W1 and the second operation W2 has been performed a set N times. In the first embodiment, it is determined whether or not the first operation W1 is completed twice. If NO is determined in S16, the process returns to S8, and the first operation W1 and the second operation W2 are executed again. If YES is determined in S <b> 16, the air exclusion process S <b> 2 is terminated and the process proceeds to the next steam supply process S <b> 3.

(給蒸工程および滅菌工程)
給蒸工程S3では、S12の制御状態として、前記第一給蒸ライン2を通して前記滅菌室1内へ、加熱滅菌用の蒸気を供給する。そして、前記滅菌室1内に蒸気を充満させた状態を所定時間継続する滅菌工程を行う。この給蒸工程S3から滅菌工程S4への移行は、前記温度センサ18が設定された滅菌温度、例えば135℃を検出することにより実行される。そして、滅菌時間のカウントが開始され、所定時間の滅菌工程S4が行われた後に、滅菌工程S4を終了する。
(Steaming process and sterilization process)
In the steaming step S3, steam for heat sterilization is supplied into the sterilization chamber 1 through the first steaming line 2 as the control state of S12. And the sterilization process which continues the state which filled the vapor | steam in the said sterilization chamber 1 for a predetermined time is performed. The transition from the steaming step S3 to the sterilization step S4 is performed by detecting the sterilization temperature set by the temperature sensor 18, for example, 135 ° C. Then, the counting of the sterilization time is started, and after the sterilization step S4 for a predetermined time is performed, the sterilization step S4 is finished.

前記の給蒸工程S3および滅菌工程S4において、前記滅菌室1および前記蒸気ジャケット2内への蒸気の供給は、前記第一、第二圧力センサ15、16からの検出信号に基づいて前記第一、第二給蒸バルブ5、6を制御することにより行われる。前記滅菌室1内温度は、前記第一給蒸バルブ5の開度を微調整することで、第二設定値となるように制御される。   In the steam supply step S3 and the sterilization step S4, the supply of steam into the sterilization chamber 1 and the steam jacket 2 is based on the detection signals from the first and second pressure sensors 15 and 16, respectively. The second steam supply valves 5 and 6 are controlled. The temperature in the sterilization chamber 1 is controlled to be a second set value by finely adjusting the opening of the first steam supply valve 5.

(実施例1の効果)
この実施例1によれば、前記空気排除工程S2において、前記減圧バルブ12への閉信号供給と同時に前記開閉バルブ7を開くことにより、直ちに全開の前記給蒸バルブ5により蒸気を供給することができ、前記第二操作W2における大気圧到達までの時間を短縮できる。
(Effect of Example 1)
According to the first embodiment, in the air evacuation step S2, by opening the opening / closing valve 7 simultaneously with the supply of the closing signal to the pressure reducing valve 12, the steam is immediately supplied by the steam supply valve 5 which is fully opened. This can shorten the time required to reach atmospheric pressure in the second operation W2.

また、前記減圧バルブ12を開度が徐々に増減するバルブで構成し、この減圧バルブ12を閉じ始めると同時に前記開閉バルブ7を開くように構成するとともに、前記減圧バルブ12が開き始めるタイミングを、前記減圧バルブ12が閉じ終わる第一設定圧P1よりも所定値高い第二設定圧P2に到達した時点として、前記減圧バルブ12の閉じ始めるタイミングを早くしているので、前記第二操作における大気圧到達までの時間を一層短縮で
きる。
In addition, the pressure reducing valve 12 is configured with a valve whose opening degree is gradually increased and decreased, and the opening and closing valve 7 is opened at the same time as the pressure reducing valve 12 starts to be closed. Since the timing at which the pressure reducing valve 12 starts to close is advanced as the time when the pressure reaches the second set pressure P2 that is higher than the first set pressure P1 by which the pressure reducing valve 12 finishes closing, the atmospheric pressure in the second operation is increased. Time to reach can be further reduced.

この実施例1における空気排除工程S2の時間短縮は、従来の空気排除工程の時間を約7分とした場合、約1.5分短縮され、約20%の短縮率であった。この空気排除工程S2の時間短縮により、蒸気滅菌装置の回転率を向上できる。   The time reduction of the air evacuation step S2 in Example 1 was shortened by about 1.5 minutes when the time of the conventional air evacuation step was about 7 minutes, and the reduction rate was about 20%. By shortening the time of this air exclusion process S2, the rotation rate of the steam sterilizer can be improved.

この発明は、前記実施例1に限定されるものではなく、つぎの実施例2の滅菌装置を含む。図5は、同実施例2の概略構成図である。以下の説明においては、前記実施例1と異なる構成および動作を中心に説明し、同じ構成については同じ符号を付してその説明を省略する。   The present invention is not limited to the first embodiment, but includes the sterilization apparatus of the second embodiment. FIG. 5 is a schematic configuration diagram of the second embodiment. In the following description, the configuration and operation different from those of the first embodiment will be mainly described. The same components are denoted by the same reference numerals and the description thereof is omitted.

この実施例2は、図5に示すように、この発明の給蒸手段を、開度が徐々に増減する第一給蒸バルブ5とこの第一給蒸バルブ5と並列に設けた開閉二値の開閉バルブ7とから構成している。各バルブ5、7の構成は、前記実施例1と同様である。そして、前記給蒸手段の第一制御が、前記開閉バルブ7を閉じ、前記第一給蒸バルブ5の開度を調整することで行われるとともに、前記第二制御が、前記開閉バルブ5を開閉することにより行われるように構成されている。この実施例2においても、前記実施例1と同様の空気排除工程S2が実施される。   In the second embodiment, as shown in FIG. 5, the steaming means of the present invention includes a first steaming valve 5 whose opening degree is gradually increased and decreased and an open / close binary provided in parallel with the first steaming valve 5. And an opening / closing valve 7. The configurations of the valves 5 and 7 are the same as those in the first embodiment. The first control of the steaming means is performed by closing the opening / closing valve 7 and adjusting the opening of the first steaming valve 5, and the second control opens / closes the opening / closing valve 5. It is comprised so that it may be performed by doing. Also in the second embodiment, the air removal step S2 similar to that of the first embodiment is performed.

そして、この実施例2においては、制御器19は、前記第二操作開始と同時またはその直前に前記開閉バルブ7を開くことにより、前記給蒸手段を前記第二制御として給蒸量を所定量とする。なお、前記第二操作においては、前記第一給蒸バルブ5を全閉としておくが、全閉でなく、所定開度または全開とすることもできる。この場合、前記第二操作における給蒸量を増加させ、前記第二操作における大気圧到達までの時間を一層短縮できる。   In the second embodiment, the controller 19 opens the open / close valve 7 at the same time as or immediately before the start of the second operation, thereby setting the steam supply means as the second control and the steam supply amount to a predetermined amount. And In the second operation, the first steam supply valve 5 is fully closed. However, the first steam supply valve 5 may not be fully closed, but may be a predetermined opening or fully open. In this case, the amount of steam supply in the second operation can be increased, and the time to reach atmospheric pressure in the second operation can be further shortened.

この発明は、つぎの実施例3の滅菌装置を含む。図6は、同実施例3の概略構成図である。以下の説明においては、前記実施例1と異なる構成および動作を中心に説明し、同じ構成については同じ符号を付してその説明を省略する。   The present invention includes the sterilization apparatus of Example 3 below. FIG. 6 is a schematic configuration diagram of the third embodiment. In the following description, the configuration and operation different from those of the first embodiment will be mainly described. The same components are denoted by the same reference numerals and the description thereof is omitted.

この実施例3は、図6に示すように、前記第一給蒸バルブ5および前記開閉バルブ7を設ける第一給蒸ライン3に、前記蒸気ジャケット2を含ませている。すなわち、この第一給蒸ライン3は、前記滅菌室1に連通する前記開閉バルブ7を設けた給蒸ライン31と、前記蒸気ジャケット2と、前記蒸気ジャケット2と前記滅菌室1とを連通する前記第一給蒸バルブ5を設けた給蒸ライン32とにより構成している。この実施例3においても、前記実施例1と同様の空気排除工程S2が実施される。   In the third embodiment, as shown in FIG. 6, the steam jacket 2 is included in a first steam supply line 3 provided with the first steam supply valve 5 and the opening / closing valve 7. That is, the first steam supply line 3 communicates the steam supply line 31 provided with the opening / closing valve 7 communicating with the sterilization chamber 1, the steam jacket 2, the steam jacket 2, and the sterilization chamber 1. It comprises a steaming line 32 provided with the first steaming valve 5. Also in the third embodiment, the air removal step S2 similar to that in the first embodiment is performed.

この発明は、前記実施例1〜3に限定されるものではなく、前記実施例1では、第二設定圧P2にて前記減圧バルブ12の閉信号供給と同時に前記開閉バルブ7を開くように構成しているが、前記第一設定圧P1に到達した時点で、前記開閉バルブ7を開くように構成できる。   The present invention is not limited to the first to third embodiments. In the first embodiment, the open / close valve 7 is opened simultaneously with the supply of the closing signal of the pressure reducing valve 12 at the second set pressure P2. However, when the first set pressure P1 is reached, the on-off valve 7 can be opened.

1 滅菌室
3 第一給蒸ライン(給蒸ライン)
5 第一給蒸バルブ(給蒸手段)
7 開閉バルブ
12 減圧バルブ(排気手段)
13 真空ポンプ(排気手段)
19 制御器(制御手段)
1 Sterilization room 3 First steaming line (steaming line)
5 First steam supply valve (steaming means)
7 Open / close valve 12 Pressure reducing valve (exhaust means)
13 Vacuum pump (exhaust means)
19 Controller (control means)

Claims (7)

被滅菌物を収容する滅菌室と、前記滅菌室への給蒸ラインに設けた給蒸手段と、前記滅菌室内の気体を排気する排気手段と、前記給蒸手段および前記排気手段を制御し、前記滅菌室内の空気を排除する空気排除工程と被滅菌物を蒸気滅菌する滅菌工程とを行う制御手段とを備え、前記空気排除工程が、前記排気手段を作動させて前記滅菌室内の気体を排出する第一操作と、前記排気手段の作動を停止させ前記給蒸手段を作動させて前記滅菌室内へ蒸気を供給する第二操作とを交互に繰り返すことで行われる蒸気滅菌装置において、
前記給蒸手段は、開度を徐々に増減して給蒸量を調整する第一制御と開度を徐々に増減することなく給蒸量を所定量,零の二値とする第二制御とを選択する構成とし、
前記制御手段は、前記第二操作開始と同時または直前に前記給蒸手段を前記第二制御の所定量とすることを特徴とする蒸気滅菌装置。
A sterilization chamber for storing an object to be sterilized, steaming means provided in a steaming line to the sterilization chamber, exhaust means for exhausting gas in the sterilization chamber, controlling the steaming means and the exhaust means, A control means for performing an air exclusion process for excluding air in the sterilization chamber and a sterilization process for steam sterilizing an object to be sterilized, wherein the air exclusion process operates the exhaust means to discharge the gas in the sterilization chamber In the steam sterilization apparatus which is performed by alternately repeating the first operation to perform and the second operation of stopping the operation of the exhaust means and operating the steam supply means to supply steam into the sterilization chamber,
The steam supply means includes a first control for adjusting the steam supply amount by gradually increasing and decreasing the opening degree, and a second control for setting the steam supply amount to a predetermined amount and a binary value of zero without gradually increasing or decreasing the opening degree. And select
The steam sterilizer is characterized in that the control means sets the steam supply means to a predetermined amount of the second control simultaneously with or immediately before the start of the second operation.
前記給蒸手段は、開度が徐々に増減する給蒸バルブとこの給蒸バルブと直列に設けた開閉二値の開閉バルブとから構成し、
前記第一制御が、前記開閉バルブを開き、前記給蒸バルブの開度を調整することで行われるとともに、前記第二制御が、前記給蒸バルブを予め所定開度としておき前記開閉バルブを開閉することにより行われることを特徴とする請求項1に記載の蒸気滅菌装置。
The steaming means is composed of a steaming valve whose opening degree gradually increases and decreases, and an opening / closing binary switching valve provided in series with the steaming valve,
The first control is performed by opening the opening / closing valve and adjusting the opening degree of the steam supply valve, and the second control is performed by opening the opening / closing valve with the steam supply valve set in advance to a predetermined opening degree. The steam sterilization apparatus according to claim 1, wherein the steam sterilization apparatus is performed.
前記排気手段は、前記滅菌室と接続され減圧ラインに設けた減圧バルブおよび減圧手段を含む減圧排気手段にて構成し、
前記制御手段は、前記給蒸バルブを所定開度で、かつ前記開閉バルブを閉じた状態として前記減圧排気手段を作動させて、前記滅菌室内を減圧排気する前記第一操作を行い、
前記減圧バルブへの閉信号と同時に前記開閉バルブを開くことにより前記滅菌室内へ蒸気を供給する前記第二操作を行うことを特徴とする請求項2に記載の蒸気滅菌装置。
The exhaust means comprises a decompression means including a decompression valve and a decompression means connected to the sterilization chamber and provided in a decompression line;
The control means performs the first operation of evacuating the sterilization chamber by operating the reduced pressure exhaust means with the steam supply valve at a predetermined opening and the open / close valve closed.
The steam sterilization apparatus according to claim 2, wherein the second operation of supplying steam into the sterilization chamber is performed by opening the open / close valve simultaneously with a closing signal to the pressure reducing valve.
前記減圧バルブは、開度が徐々に増減するバルブで構成され、
前記制御手段は、前記減圧バルブを閉じ始めると同時に前記開閉バルブを開くことを特徴とする請求項3に記載の蒸気滅菌装置。
The pressure reducing valve is composed of a valve whose opening degree gradually increases and decreases,
The steam sterilizer according to claim 3, wherein the control means opens the open / close valve simultaneously with starting to close the pressure reducing valve.
前記制御手段は、前記減圧バルブが閉じ始めるタイミングを、前記減圧バルブが閉じ終わると同時に前記減圧排気手段を停止する第一設定圧よりも所定値高い第二設定圧に前記滅菌室内圧力が到達した時点とすることを特徴とする請求項4に記載の蒸気滅菌装置。   When the pressure reducing valve starts to close, the control means reaches the second set pressure that is higher than the first set pressure by which the pressure reducing exhaust means stops at the same time as the pressure reducing valve finishes closing. The steam sterilization apparatus according to claim 4, wherein a time point is set. 前記給蒸手段は、開度が徐々に増減する給蒸バルブとこの給蒸バルブと並列に設けた開閉二値の開閉バルブとから構成し、
第一制御が、前記開閉バルブを閉じ、前記給蒸バルブの開度を調整することで行われるとともに、第二制御が、前記開閉バルブを開閉することにより行われることを特徴とする請求項1に記載の蒸気滅菌装置。
The steaming means is composed of a steaming valve whose opening degree gradually increases and decreases and an opening / closing binary switching valve provided in parallel with the steaming valve,
2. The first control is performed by closing the opening / closing valve and adjusting the opening of the steam supply valve, and the second control is performed by opening / closing the opening / closing valve. The steam sterilizer described in 1.
前記排気手段は、前記滅菌室と接続され減圧ラインに設けた減圧バルブおよび減圧手段を含む減圧排気手段にて構成し、
前記制御手段は、前記給蒸バルブを全閉で、かつ前記開閉バルブを閉じて前記減圧排気手段を作動させて、前記滅菌室内を減圧排気する前記第一操作を行い、
前記減圧バルブへの閉信号と同時に前記開閉バルブを開くことにより前記滅菌室内へ蒸気を供給する前記第二操作を行うことを特徴とする請求項6に記載の蒸気滅菌装置。
The exhaust means comprises a decompression means including a decompression valve and a decompression means connected to the sterilization chamber and provided in a decompression line;
The control means performs the first operation of evacuating the sterilization chamber by fully closing the steam supply valve and closing the open / close valve to operate the vacuum exhaust means,
The steam sterilization apparatus according to claim 6, wherein the second operation of supplying steam into the sterilization chamber is performed by opening the open / close valve simultaneously with a closing signal to the pressure reducing valve.
JP2009106567A 2009-04-24 2009-04-24 Steam sterilization device Pending JP2010253036A (en)

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WO2013128626A1 (en) * 2012-03-02 2013-09-06 サクラ精機株式会社 Steam sterilization device
JP2019205377A (en) * 2018-05-29 2019-12-05 三浦工業株式会社 Sterilizer
JP2019205403A (en) * 2018-05-30 2019-12-05 三浦工業株式会社 Sterilizer

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WO2013128626A1 (en) * 2012-03-02 2013-09-06 サクラ精機株式会社 Steam sterilization device
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