JPH04122261A - Steam sterilizer - Google Patents
Steam sterilizerInfo
- Publication number
- JPH04122261A JPH04122261A JP2242037A JP24203790A JPH04122261A JP H04122261 A JPH04122261 A JP H04122261A JP 2242037 A JP2242037 A JP 2242037A JP 24203790 A JP24203790 A JP 24203790A JP H04122261 A JPH04122261 A JP H04122261A
- Authority
- JP
- Japan
- Prior art keywords
- steam
- pressure
- chamber
- saturated
- temperature
- 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.)
- Pending
Links
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 29
- 238000001514 detection method Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 230000005484 gravity Effects 0.000 abstract description 2
- 230000001954 sterilising effect Effects 0.000 description 6
- 238000004659 sterilization and disinfection Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、チャンバー内に収納した被滅菌物を高温高圧
蒸気によって滅菌する蒸気滅菌器に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a steam sterilizer that sterilizes objects to be sterilized stored in a chamber using high-temperature, high-pressure steam.
（ロ）従来の技術
従来、この種の蒸気滅菌器は、例えば実公昭５９−５１
８５２号公報に示されているように、被滅菌物を収納し
たチャンバー内を真空ポンプによって真空状態とし、そ
の後前記チャンバー内に高温高圧蒸気を充満させて飽和
蒸気状態とし、前記被滅菌物を蒸気滅菌する構成として
いる。(B) Conventional technology Conventionally, this type of steam sterilizer was used, for example, in
As shown in Publication No. 852, the inside of a chamber containing objects to be sterilized is brought into a vacuum state using a vacuum pump, and then the chamber is filled with high-temperature, high-pressure steam to create a saturated steam state, and the objects to be sterilized are brought into a state of steam. It is configured to be sterilized.
ところが、チャンバー内を真空状態とした後高温高圧蒸
気を充満させても、被滅菌物の中に含まれる残留空気が
チャンバー内に放出されて不飽和蒸気状態となり、滅菌
が不完全となるという問題があった。However, even if the chamber is evacuated and then filled with high-temperature, high-pressure steam, residual air contained in the objects to be sterilized is released into the chamber, creating an unsaturated steam state, resulting in incomplete sterilization. was there.
また、チャンバー内の温度が１００℃前後になった時、
蒸気圧を利用して残留空気を一定時間排出する方法もあ
るが、残留空気を完全に排出したか否か確認できないと
いう問題がある。Also, when the temperature inside the chamber reaches around 100℃,
There is a method of exhausting residual air for a certain period of time using vapor pressure, but there is a problem in that it cannot be confirmed whether the residual air has been completely exhausted.
（ハ）発明が解決しようとする課題
本発明は、上記の問題点を解決すべく成されたもので、
チャンバー内の残留空気を完全に排出して飽和蒸気状態
とし、被滅菌物の確実な滅菌を行なうことができる蒸気
滅菌器を提供するものである。(c) Problems to be solved by the invention The present invention has been made to solve the above problems.
To provide a steam sterilizer that can completely exhaust residual air in a chamber to make it into a saturated steam state and reliably sterilize objects to be sterilized.
（ニ）課題を解決するための手段
本発明は、被滅菌物を収納後密閉されるチャンバーと、
このチャンバーを加熱するヒータと、前記チャンバー内
外を連通、遮断する弁装置と、前記チャンバー内の温度
と圧力を検出する検出手段と、前記チャンバー内の飽和
蒸気特性を示す予め求められた温度と圧力の相関データ
を記憶した記憶手段と、前記検出手段の検出データと前
記記憶手段の記憶データに基づいて前記チャンバー内の
蒸気が飽和蒸気か否か判定する判定手段と、判定手段に
よって飽和蒸気と判定されると前記弁装置を閉弁し、不
飽和蒸気と判定されると前記弁装置を開弁する制御手段
とで構成したものである。(d) Means for Solving the Problems The present invention provides a chamber that is sealed after storing an object to be sterilized;
A heater that heats the chamber, a valve device that communicates and shuts off communication between the inside and outside of the chamber, a detection means that detects the temperature and pressure inside the chamber, and a predetermined temperature and pressure that indicate the saturated steam characteristics inside the chamber. storage means storing correlation data of the above, determination means for determining whether or not the steam in the chamber is saturated steam based on the detection data of the detection means and the storage data of the storage means, and determining that the steam is saturated steam by the determination means. The control means closes the valve device when the vapor is detected as unsaturated steam, and opens the valve device when it is determined that the vapor is unsaturated steam.
（ホ）作 用
本発明は上記の構成により、チャンバー内に被滅菌物か
ら放出された空気が残留している場合、検出手段で検出
した温度と圧力のデータと、記憶手段に記憶している飽
和蒸気の温度と圧力データとが相異するので、判定手段
が不飽和蒸気の判定を行い、その判定に従って制御手段
が弁装置を開弁する。この弁装置が開弁すると、チャン
バー内は残留空気が導出パイプを介して排出されて飽和
蒸気となり、完全な蒸気滅菌を行なうことができる。(E) Effect With the above configuration, the present invention stores the temperature and pressure data detected by the detection means and the data in the storage means when air released from the object to be sterilized remains in the chamber. Since the temperature and pressure data of the saturated steam are different, the determination means determines that the steam is unsaturated, and the control means opens the valve device according to the determination. When this valve device opens, residual air in the chamber is discharged through the outlet pipe and becomes saturated steam, making it possible to perform complete steam sterilization.
（ホ）実施例
以下、本発明の実施例を図面を参照して説明する。第１
図において、（１）は被滅菌物を収納するチャンバーで
、前面開口には被滅菌物を出し入れするためのＭ（２）
が取付けられ、これを閉じると蒸気の漏れがないように
密閉される。（３）は加熱用のヒータ、（４）は被滅菌
物載置用の棚、（５）は水位センサー、（６）はサーミ
スター等の温度検出素子である。（７）はチャンバー（
１）内の圧力を検出する圧力検出器、（８）は温度検出
素子（６）に接続された温度検出器である。(e) Examples Examples of the present invention will now be described with reference to the drawings. 1st
In the figure, (1) is a chamber that stores objects to be sterilized, and the front opening has an M (2) for taking in and taking out objects to be sterilized.
is installed, and when closed, it is sealed to prevent steam leakage. (3) is a heater for heating, (4) is a shelf for placing objects to be sterilized, (5) is a water level sensor, and (6) is a temperature detection element such as a thermistor. (7) is the chamber (
1) is a pressure detector for detecting the pressure inside, and (8) is a temperature detector connected to the temperature detection element (6).
（９）はチャンバー（１）内を負圧にする真空ポンプ、
（１０）はチャンバー（１）とこのポンプ（９）を連通
ずるパイプ（１１）に介在した第１を磁弁である。(9) is a vacuum pump that makes the inside of chamber (1) negative pressure;
(10) is a first magnetic valve interposed in a pipe (11) communicating the chamber (1) and this pump (9).
（１２）は貯水タンクで、第２電磁弁（１３）を有する
給水パイプ（１４）を介してチャンバー（１）に接続さ
れている。（１５）はチャンバー（１）内の蒸気を貯水
タンク（１２）に案内する導出パイプで、その途中を分
岐して弁座の孔径の大きい第３電磁弁（１６）と、孔径
の小さい第４電磁弁（１７）とを並設している。(12) is a water storage tank, which is connected to the chamber (1) via a water supply pipe (14) having a second electromagnetic valve (13). (15) is a lead-out pipe that guides the steam in the chamber (1) to the water storage tank (12), and it branches in the middle to connect a third solenoid valve (16) with a large hole in the valve seat, and a fourth solenoid valve with a small hole in the valve seat. A solenoid valve (17) is installed in parallel.
第３図において、（１８）は圧力検出器（７）と温度検
出器（８）によって構成される検出手段、（１９）は予
めチャンバー（１）内の温度と圧力を測定して、飽和蒸
気状態における各温度と圧力の相関データを求め、飽和
蒸気の温度−圧力特性を示すこれらのデータを記憶した
記憶手段である。（２０）は検出手段（１８）によって
検出された温度と圧力のデータと、記憶手段（１９）に
記憶された飽和蒸気の温度と圧力のデータを比較して、
飽和蒸気か否か判定する判定手段である。（２１）はヒ
ータ（３）、第１電磁弁（１０）〜第４電磁弁（１７）
、真空ポンプ（９）等より成る高力手段で、制御手段（
２２）によって各要素の動作が制御される。（２３）は
水位センサー（５）等を含む入力手段である。In Fig. 3, (18) is a detection means composed of a pressure detector (7) and a temperature detector (8), and (19) is a detection means that measures the temperature and pressure inside the chamber (1) in advance to detect saturated steam. It is a storage means that obtains correlation data of each temperature and pressure in the state and stores these data indicating the temperature-pressure characteristics of saturated steam. (20) compares the temperature and pressure data detected by the detection means (18) with the temperature and pressure data of saturated steam stored in the storage means (19),
This is a determining means for determining whether or not the steam is saturated. (21) is the heater (3), the first solenoid valve (10) to the fourth solenoid valve (17)
, a vacuum pump (9), etc., and a control means (
22) controls the operation of each element. (23) is an input means including a water level sensor (5) and the like.
次に上記構成における動作について説明する。Next, the operation in the above configuration will be explained.
まず、チャンバー（１）内に被滅菌物を収納して蓋（２
）を閉じ、入力手段（２３）より滅菌の開始の入力を行
なうと、制御手段（２２）は、第１電磁弁（１０）を開
いた後、真空ポンプ（９）を一定時間駆動せしめチャン
バー（１）内を所定の負圧とし、第１電磁弁（１０）を
閉じる。続いて第２電磁弁（１３）を開いて負圧のチャ
ンバー（１）内へ貯水タンク（１２）の水を給水し、水
位センサー（５）にて所定水位を検出すると、第２電磁
弁（１３）を閉じて給水を終了する。First, the object to be sterilized is stored in the chamber (1) and the lid (2
) is closed and input to start sterilization is made from the input means (23), the control means (22) opens the first solenoid valve (10) and then drives the vacuum pump (9) for a certain period of time to close the chamber ( 1) Create a predetermined negative pressure inside and close the first solenoid valve (10). Next, the second solenoid valve (13) is opened to supply water from the water storage tank (12) into the negative pressure chamber (1), and when the water level sensor (5) detects a predetermined water level, the second solenoid valve (13) is opened. 13) to end the water supply.
次に、真空ポンプ（９）によってチャンバー（１）内の
所定の真空引きを行なった後に第１を磁弁（１０）を閉
じ、続いてヒータ（３）への通電を開始して給水した水
の加熱を行なう。Next, after the chamber (1) is evacuated to a predetermined level using the vacuum pump (9), the first magnetic valve (10) is closed, and then the heater (3) is energized to remove the supplied water. Heating is performed.
そしてその後第４図に示す手順に沿って残留空気の排出
が行われる。すなわち、チャンバー（１）内の温度が上
昇し、所定温度（１００℃）に達したことが温度検出器
（８）からの入力によって判明すると、判別手段（２０
）は１００℃に対応して記憶手段（１９）に記憶されて
いる飽和蒸気圧力データ（ａＯ）を読み出し、圧力検出
器（７）の検出した圧力（ｂＯ）と比較する。その結果
、検出圧力（ｂｏ）が飽和圧力（ａＯ）より大きい場合
、不飽和蒸気と判定し、第３電磁弁（１６）を開弁する
。第３電磁弁（１６）が開くと、蒸気より比重の大きい
残留空気は、蒸気の圧力によって導出パイプ（１５）を
介して貯水タンク（１２）へ排出される。その後内部圧
力が低下し、検出圧力（ｂＯ）が飽和圧力（ａＯ）以下
となると、第３電磁弁（１６）が閉じられる。Thereafter, the residual air is discharged according to the procedure shown in FIG. That is, when it is determined from the input from the temperature detector (8) that the temperature inside the chamber (1) has increased and reached a predetermined temperature (100°C), the determination means (20
) reads the saturated steam pressure data (aO) stored in the storage means (19) corresponding to 100°C and compares it with the pressure (bO) detected by the pressure detector (7). As a result, if the detected pressure (bo) is higher than the saturated pressure (aO), it is determined that the steam is unsaturated, and the third electromagnetic valve (16) is opened. When the third solenoid valve (16) opens, the residual air, which has a higher specific gravity than the steam, is discharged to the water storage tank (12) through the outlet pipe (15) due to the pressure of the steam. Thereafter, when the internal pressure decreases and the detected pressure (bO) becomes equal to or lower than the saturation pressure (aO), the third solenoid valve (16) is closed.
ヒータ（３）の加熱によってチャンバー（１）内の温度
が上昇し、温度検出器（８）によって１１０℃に達した
ことが検出されると、判定手段（２０）は、１１０℃に
対応して記憶手段（１９）に記憶されている飽和圧力（
ａｌ）を読み出し、圧力検出器（７）の検出した圧力（
ｂｌ）と比較し、検出圧力（ｂｌ）の方が大きければ、
不飽和蒸気と判断し、この場合は残留空気が少ないので
弁座孔径の小さい第４電磁弁（１７）を開け、残留空気
を排出する。この時、制御手段（２２）は、チャンバー
（１）内の温度が低下しないように第４電磁弁（１７）
の開閉を制御する。また、検出圧力（ｂｌ）が飽和圧力
（ａｌ）以下の場合は飽和蒸気と判定して第４電磁弁（
１７）を閉じる。When the temperature inside the chamber (1) rises due to heating by the heater (3) and the temperature detector (8) detects that the temperature has reached 110°C, the determining means (20) determines that the temperature in the chamber (1) corresponds to 110°C. The saturation pressure (
al) and the pressure detected by the pressure detector (7) (
If the detected pressure (bl) is larger than bl),
It is determined that it is unsaturated steam, and in this case, there is little residual air, so the fourth solenoid valve (17) with a small valve seat hole diameter is opened to discharge the residual air. At this time, the control means (22) controls the fourth solenoid valve (17) so that the temperature inside the chamber (1) does not drop.
control opening and closing. Also, if the detected pressure (bl) is lower than the saturated pressure (al), it is determined that the steam is saturated and the fourth solenoid valve (
17) Close.
その後チャンバー（１）内の温度が１１５℃に達したこ
とを温度検出器（８）により検出すると、記憶手段（１
９）から１１５℃に対応する飽和圧力（ａ２）を読み出
し、検出圧力（ｂ２）と比較し、上記した１１０℃の場
合と同様にして残留空気の排出を行ない、チャンバー（
１）内を飽和蒸気とする。Thereafter, when the temperature detector (8) detects that the temperature inside the chamber (1) has reached 115°C, the storage means (1)
9), read out the saturation pressure (a2) corresponding to 115°C, compare it with the detected pressure (b2), discharge the residual air in the same way as in the case of 110°C, and remove the chamber (
1) Let the inside be saturated steam.
この状態でヒータ（３）の加熱が継続され、チャンバー
（１）内が滅菌温度（約１２５℃）に達すると、この滅
菌温度を所定時間維持するようにヒータ（３）の加熱量
が制御手段（２２）によって調節され、チャンバー（１
）内に収納した被滅菌物が飽和蒸気によって確実に滅菌
される。In this state, the heating of the heater (3) continues, and when the inside of the chamber (1) reaches the sterilization temperature (approximately 125°C), the heating amount of the heater (3) is controlled by the control means so as to maintain this sterilization temperature for a predetermined period of time. (22) and the chamber (1
) The objects to be sterilized stored in the chamber are reliably sterilized by saturated steam.
尚、上記実施例では残留空気の排出をチャンバー内が１
００℃となってから開始したが、例えば大気圧（１気圧
）なとの所定圧力となった後に開始してもよい。In addition, in the above embodiment, the residual air is discharged when the inside of the chamber is 1.
Although the process is started after the temperature reaches 00°C, it may be started after a predetermined pressure such as atmospheric pressure (1 atm) is reached, for example.
（ト）発明の効果
以上のように本発明によれば、検出したチャンバー内の
温度と圧力を、予め求めた飽和蒸気の温度と圧力の相関
データと比較して、飽和蒸気か否か判定し、不飽和蒸気
の場合はチャンバー内の残留空気を排出するようにして
いるので、被滅菌物が空気を多く含むものであっても、
それから発生する空気をチャンバーの外に排気してチャ
ンバー内を飽和蒸気で満たすことができ、飽和蒸気によ
る確実な滅菌を行なうことができる。(G) Effects of the Invention As described above, according to the present invention, the detected temperature and pressure inside the chamber are compared with predetermined correlation data of the temperature and pressure of saturated steam to determine whether the steam is saturated or not. In the case of unsaturated steam, residual air in the chamber is exhausted, so even if the object to be sterilized contains a large amount of air,
The air generated therefrom can be exhausted to the outside of the chamber to fill the chamber with saturated steam, thereby ensuring reliable sterilization using the saturated steam.
第１図は本発明の一実施例を示す概略構成図、第２図は
同実施例の温度と圧力の変化を示す特性図、第３図は同
実施例のブロック図、第４図は同実施例の残留空気排出
動作を示すフローチャートである。
（１）・・・チャンバー、（７）・・・圧力検出器、温
度検出器、（１０）（１３）（１６）（１７）・・・電
磁弁、記憶手段、（２０）・・・判定手段。
（８）・・・
（１９）・・・
出願人 三洋電機株式会社外１名
代理人 弁理士 西野卓嗣（外２名）
第
１図
第２図
第３図
２Ｆイン１＼“’−ｔＲ落」尾Fig. 1 is a schematic configuration diagram showing an embodiment of the present invention, Fig. 2 is a characteristic diagram showing changes in temperature and pressure of the embodiment, Fig. 3 is a block diagram of the embodiment, and Fig. 4 is the same. It is a flowchart which shows residual air discharge operation of an example. (1)...Chamber, (7)...Pressure detector, temperature detector, (10) (13) (16) (17)...Solenoid valve, storage means, (20)...Judgment means. (8)... (19)... Applicant Sanyo Electric Co., Ltd. and one other agent Patent attorney Takuji Nishino (two others) Figure 1 Figure 2 Figure 3 2F-in-1\"'-tR drop "tail
Claims (2)
ャンバー内を加熱するヒータと、前記チャンバーの内外
を連通、遮断する弁装置と、前記チャンバー内の温度と
圧力を検出する検出手段と、予め求められた前記チャン
バー内の飽和蒸気特性を示す温度と圧力の相関データを
記憶した記憶手段と、前記検出手段の検出データと前記
記憶手段の記憶データに基づいて前記チャンバー内の蒸
気が飽和蒸気か否か判定する判定手段と、該判定手段に
よって飽和蒸気と判定されると前記弁装置を閉弁し、不
飽和蒸気と判定されると前記弁装置を開弁する制御手段
とを備えることを特徴とする蒸気滅菌器。(1) A chamber that is sealed after storing objects to be sterilized, a heater that heats the inside of the chamber, a valve device that connects and shuts off communication between the inside and outside of the chamber, and a detection means that detects the temperature and pressure inside the chamber. , storage means storing correlation data between temperature and pressure indicating the saturated steam characteristics in the chamber determined in advance; and saturated steam in the chamber based on the detection data of the detection means and the stored data of the storage means. A determining means for determining whether the steam is steam or not, and a control means for closing the valve device when the determining means determines that the steam is saturated steam, and opening the valve device when the steam is determined to be unsaturated steam. A steam sterilizer featuring:
しくは所定の圧力となった後に動作することを特徴とす
る特許請求の範囲第１項記載の蒸気滅菌器。(2) The steam sterilizer according to claim 1, wherein the determining means operates after the inside of the chamber reaches a predetermined temperature or a predetermined pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2242037A JPH04122261A (en) | 1990-09-11 | 1990-09-11 | Steam sterilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2242037A JPH04122261A (en) | 1990-09-11 | 1990-09-11 | Steam sterilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04122261A true JPH04122261A (en) | 1992-04-22 |
Family
ID=17083336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2242037A Pending JPH04122261A (en) | 1990-09-11 | 1990-09-11 | Steam sterilizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04122261A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006230889A (en) * | 2005-02-28 | 2006-09-07 | Miura Co Ltd | Operation method for pressure container with heating means |
| KR100684635B1 (en) * | 2005-02-24 | 2007-02-22 | 곽쾌열 | Treatment apparatus for steam sterilization and dryness |
| JP2008237919A (en) * | 2008-05-12 | 2008-10-09 | Takazono Sangyo Co Ltd | Steam sterilizer and method for controlling the same |
-
1990
- 1990-09-11 JP JP2242037A patent/JPH04122261A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100684635B1 (en) * | 2005-02-24 | 2007-02-22 | 곽쾌열 | Treatment apparatus for steam sterilization and dryness |
| JP2006230889A (en) * | 2005-02-28 | 2006-09-07 | Miura Co Ltd | Operation method for pressure container with heating means |
| JP4600815B2 (en) * | 2005-02-28 | 2010-12-22 | 三浦工業株式会社 | Operation method of pressure vessel equipped with heating means |
| JP2008237919A (en) * | 2008-05-12 | 2008-10-09 | Takazono Sangyo Co Ltd | Steam sterilizer and method for controlling the same |
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