JP2000279490A - Steam sterilizer - Google Patents
Steam sterilizerInfo
- Publication number
- JP2000279490A JP2000279490A JP11089233A JP8923399A JP2000279490A JP 2000279490 A JP2000279490 A JP 2000279490A JP 11089233 A JP11089233 A JP 11089233A JP 8923399 A JP8923399 A JP 8923399A JP 2000279490 A JP2000279490 A JP 2000279490A
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- Prior art keywords
- temperature
- chamber
- temp
- sterilization
- evacuation
- 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.)
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- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、培地などを滅菌す
る蒸気滅菌器に関するものである。TECHNICAL FIELD The present invention relates to a steam sterilizer for sterilizing a culture medium and the like.
【０００２】[0002]
【従来の技術】水や食品などから病原菌を検出する代わ
りに検出が容易な菌の存否を試験する方法が用いられ
る。この菌の検出は、例えば食品中に存在する大腸菌を
検出する試験法として用いられるが、詳細には、培地１
０ミリリットルに対して希釈試料１ミリリットルの割合
で加えることが多い。清涼飲料や飲料水などの試験では
試作（原液）１０ミリリットル、１ミリリットルおよび
１０倍の希釈液をダーラム発酵管に接種する。この場
合、１０ミリリットル接種用には１０ミリリットルの倍
濃度の乳糖ブイヨンまたはＢＧＬＢ培地を入れたダーラ
ム発酵管を使用する。2. Description of the Related Art Instead of detecting pathogenic bacteria from water, foods, and the like, a method of testing for the presence of easily detectable bacteria is used. The detection of this bacterium is used, for example, as a test method for detecting Escherichia coli present in foods.
It is often added at a ratio of 1 milliliter of diluted sample to 0 milliliter. In tests for soft drinks and drinking water, etc., 10 ml, 1 ml and a 10-fold dilution of the prototype (stock solution) are inoculated into a Durham fermentation tube. In this case, for inoculation of 10 ml, a Durham fermentation tube containing lactose broth or BGLB medium of 10 ml double concentration is used.
【０００３】具体的な細菌の生理試験法は、直径が８ミ
リメートルで長さが１３０ミリメートル程度の小試験管
内にペプトン水を入れて殺菌綿で栓を行い、細菌に供試
糖類を１％加えて開口部を閉じた内径が２ミリメート
ル、長さが２センチメートル程度のダーラム管を前記小
試験管内に入れる。[0003] A specific physiological test method for bacteria is to put peptone water into a small test tube having a diameter of about 8 mm and a length of about 130 mm, plug with sterile cotton, and add 1% of a test sugar to the bacteria. A Durham tube having an inner diameter of about 2 millimeters and a length of about 2 centimeters with the opening closed is placed in the small test tube.
【０００４】その後、間断滅菌後、殺菌水にて洗浄した
菌液を殺菌ピペットで１〜２滴接種し、２５〜３０℃に
２４〜４８時間培養する。[0004] After intermittent sterilization, 1-2 drops of the bacterial solution washed with sterile water are inoculated with a sterile pipette and cultured at 25-30 ° C for 24-48 hours.
【０００５】以上が培地を用いた所謂ダーラム管の試験
方法であるが、この様な試験方法を開示した先行技術と
して特開平５−１５３９７号公報がある。The above is a method for testing a so-called Durham tube using a medium. Japanese Patent Application Laid-Open No. 5-15397 discloses a prior art which discloses such a test method.
【０００６】[0006]
【発明が解決しようとする課題】前述の様な試験方法に
おいて、滅菌を行う工程があるが、この様な滅菌を特開
平１０−２２５５０５号公報のような縦型の高圧蒸気滅
菌器により行っている。In the above-described test method, there is a step of performing sterilization. Such sterilization is performed by using a vertical high-pressure steam sterilizer as disclosed in Japanese Patent Application Laid-Open No. 10-225505. I have.
【０００７】ところが、高圧蒸気滅菌器には滅菌工程の
完了後に排気バルブを開放してチャンバー内の圧力を大
気中に放出し排気工程を終了して一連の滅菌作業を終了
するわけであるが、滅菌工程の完了直後に排気工程を実
行すれば一連の滅菌作業時間を短縮できるもののダーラ
ム管による試験方法の場合には、細菌、培地の種類によ
ってはチャンバー内が高温の状態にある時に一気に排気
した場合には、培地が突沸現象を生じダーラム管から吹
き溢れる欠点があった。However, in the high-pressure steam sterilizer, after the sterilization process is completed, the exhaust valve is opened to release the pressure in the chamber to the atmosphere, the exhaust process is completed, and a series of sterilization operations is completed. If the evacuation process is performed immediately after the completion of the sterilization process, a series of sterilization work time can be shortened, but in the case of a test method using a Durham tube, depending on the type of bacteria and culture medium, the chamber is evacuated at a stretch when it is in a high temperature state. In this case, there was a drawback that the medium was bumped and overflowed from the Durham tube.
【０００８】このため、従来では説明書等を基にして滅
菌工程の終了時に傍にいて培地の種類とチャンバー内の
温度を見ながらニードル式の手動排気弁を徐々に開放し
ていたが、開放する量の調整が困難であり、誤って一気
に開放した場合にはチャンバー内の水も排出されて空焚
きの危険があった。[0008] For this reason, conventionally, the needle type manual exhaust valve was gradually opened while watching the type of the culture medium and the temperature in the chamber by the side at the end of the sterilization process based on the instruction manual. It is difficult to adjust the amount of water to be removed, and if the water is accidentally opened at once, the water in the chamber is also discharged, and there is a danger of empty firing.
【０００９】本発明は、使用者が滅菌工程の終了後に滅
菌器本体に付いておらずとも予め使用者が設定した任意
の温度にて排気バルブの排気を行うものである。According to the present invention, the exhaust valve is exhausted at an arbitrary temperature set in advance by the user even if the user does not attach to the sterilizer after the sterilization process is completed.
【００１０】[0010]
【課題を解決するための手段】本発明は、滅菌物を収容
し内部を飽和蒸気圧に保持するチャンバーと、前記チャ
ンバー内と大気とを連通してチャンバー内の圧力を抜く
排気バルブと、前記チャンバー内の温度を検出する温度
センサーと、前記温度センサーによる検出温度に基づい
て前記排気バルブを閉止状態或は開放状態にする制御回
路と、前記制御回路に接続され滅菌工程終了後の前記チ
ャンバー内が沸点温度以上の任意の温度に設定して前記
排気バルブの開放を行う排気設定手段を設けたものであ
る。According to the present invention, there is provided a chamber for containing a sterilized material and maintaining the inside at a saturated vapor pressure, an exhaust valve for communicating the inside of the chamber with the atmosphere to release the pressure in the chamber, A temperature sensor for detecting the temperature in the chamber, a control circuit for closing or opening the exhaust valve based on the temperature detected by the temperature sensor; Is provided with exhaust setting means for opening the exhaust valve by setting the temperature at an arbitrary temperature equal to or higher than the boiling point.
【００１１】また、前記排気設定手段による排気バルブ
の開放温度は、チャンバー内の沸点温度よりも高く、且
つ滅菌設定温度よりも低い温度の間の任意の温度に設定
するものである。Further, the opening temperature of the exhaust valve by the exhaust setting means is set to an arbitrary temperature between a boiling point temperature in the chamber and a temperature lower than the sterilization setting temperature.
【００１２】[0012]
【発明の実施の形態】図１は本発明の蒸気滅菌器の要部
を示すタイムチャート、図２は同じく外観斜視図、図３
は同じく配管図、図４は同じく操作表示部の平面図、図
５は同じくブロック図、図６は同じく滅菌対象物として
のダーラム管を示す説明図である。FIG. 1 is a time chart showing a main part of a steam sterilizer of the present invention, FIG.
4 is a piping diagram, FIG. 4 is a plan view of an operation display unit, FIG. 5 is a block diagram, and FIG. 6 is an explanatory diagram showing a Durham tube as an object to be sterilized.
【００１３】（１）は箱型の滅菌器本体（以下単に本体
とする）。（２）は前記本体内に固定し上部を開口部
（３）とした有底筒状のチャンバー、（４）は前記チャ
ンバーの内底部に固定した滅菌ヒータ、（５）は前記チ
ャンバー（２）の側壁に取り付けられ該チャンバー内の
温度を検出する温度センサー（横サーミスタ）、（６）
は前記チャンバーの上部に連結した圧力抜きパイプ、
（７）は一端を前記圧力抜きパイプに連結した針式圧力
計、（８）は前記針式圧力計の他端に連結したエアーパ
イプ、（９）は一端を前記エアーパイプに連結した圧力
抜き弁で、チャンバー内が飽和蒸気圧となるまでは開放
してチャンバー内の水分、蒸気を放出し、その後閉止し
てチャンバー内を飽和蒸気圧に保持する。（１０）は前
記圧力抜き弁（９）の他端に連結した該圧力抜き弁が作
動しない場合の安全弁である。(1) is a box-shaped sterilizer main body (hereinafter simply referred to as main body). (2) is a bottomed cylindrical chamber fixed in the main body and having an opening (3) at the top, (4) is a sterilization heater fixed to the inner bottom of the chamber, and (5) is the chamber (2). Temperature sensor (transverse thermistor) mounted on the side wall of the chamber to detect the temperature in the chamber, (6)
Is a pressure relief pipe connected to the top of the chamber,
(7) is a needle pressure gauge having one end connected to the pressure release pipe, (8) is an air pipe connected to the other end of the needle pressure gauge, and (9) is a pressure release having one end connected to the air pipe. The valve is opened to release moisture and vapor in the chamber until the inside of the chamber reaches the saturated vapor pressure, and then closed to maintain the inside of the chamber at the saturated vapor pressure. (10) is a safety valve connected to the other end of the pressure relief valve (9) when the pressure relief valve does not operate.
【００１４】（１１）は前記チャンバー（２）の下部に
連結した排気パイプ、（１２）は一端を前記排気パイプ
に連結した電磁式の排気バルブ（電磁バルブ）で、通常
時（滅菌工程時）は閉止状態となってチャンバー内と大
気との連通を遮断し、滅菌工程の終了後の前記チャンバ
ー内が所定の沸点温度以上の予め使用者が設定した温度
に達した時に自動で開放状態となってチャンバー内の圧
力を大気中に排気して常圧（大気圧）にする。（１３）
は前記排気パイプ（１１）に連結したディジタル式圧力
計である。(11) is an exhaust pipe connected to the lower part of the chamber (2), and (12) is an electromagnetic exhaust valve (electromagnetic valve) connected at one end to the exhaust pipe. Is closed and shuts off the communication between the inside of the chamber and the atmosphere, and automatically opens when the inside of the chamber reaches a predetermined boiling point temperature or higher after the sterilization step and is higher than a predetermined boiling point temperature. The pressure in the chamber is exhausted to the atmosphere to make it normal pressure (atmospheric pressure). (13)
Is a digital pressure gauge connected to the exhaust pipe (11).
【００１５】（１４）は一端を前記排気バルブ（１２）
の他端に連結した導出パイプ、（１５）は前記本体
（１）の前面に設けた凹所（１６）に収脱自在に設けた
排気タンクで、前記導出パイプ（１４）の先端を連結す
ると共に内部にあらかじめ適量の水（Ｗ）を入れてい
る。（１６）は通気パイプ（１７）を介して前記排気タ
ンク（１５）に連結したスペアタンクで、前記排気タン
ク（１５）内の高圧蒸気が満量となった時に前記通気パ
イプ（１７）を介して送気する。（１８）（１８）は各
パイプを連結するチーズである。(14) One end of the exhaust valve (12)
Is an outlet tank connected to the other end of the outlet pipe, and (15) is an exhaust tank provided in the recess (16) provided on the front surface of the main body (1) so as to be removably attached to the outlet pipe. At the same time, an appropriate amount of water (W) is put in advance. (16) is a spare tank connected to the exhaust tank (15) via a ventilation pipe (17). When the high pressure steam in the exhaust tank (15) becomes full, the spare tank is connected to the spare tank via the ventilation pipe (17). To send air. (18) (18) is a cheese connecting the pipes.
【００１６】（１９）は前記チャンバー（２）の底壁に
連結したドレンパイプ、（２０）は前記ドレンパイプに
連結し手動によりチャンバー内の水を排水するドレンコ
ック、（２１）は水位が低下したことを検出する底セン
サー（サーミスタ）である。（２２）は前記本体（１）
の上部に開閉自在に設けた蓋体で閉塞時に前記チャンバ
ー（２）の開口部（３）を密閉する開閉蓋（２３）を有
している。（２４）は前記蓋体（２２）の閉塞時に開口
部（３）の密閉状態を保持、滅菌物の取り出し時開口部
（３）の開放を可能とするロック装置（図示せず）のレ
バーである。(19) is a drain pipe connected to the bottom wall of the chamber (2), (20) is a drain cock connected to the drain pipe and drains water in the chamber manually, and (21) lowers the water level. This is a bottom sensor (thermistor) that detects that the operation has been performed. (22) is the body (1)
An opening / closing lid (23) for closing the opening (3) of the chamber (2) when closed by a lid provided to be openable and closable on the upper part of the chamber. Reference numeral (24) denotes a lever of a lock device (not shown) which keeps the closed state of the opening (3) when the lid (22) is closed and allows the opening (3) to be opened when taking out the sterilized material. is there.
【００１７】（２５）は前記本体（１）の上面の一側に
設けた操作表示部で、図４に基づいて詳細を説明する。An operation display section (25) provided on one side of the upper surface of the main body (1) will be described in detail with reference to FIG.
【００１８】（２６）は順次点灯して一連の滅菌工程を
表示する工程表示器で、一連の滅菌工程は、滅菌ヒー
タ（４）による加熱、設定された滅菌温度での滅菌
（培地の溶解）、チャンバー内の圧力の排気、排気
終了後のチャンバー内の乾燥、があるが、培地の種類に
よってはの排気終了後に保温を行うことができる。(26) is a process indicator for sequentially lighting and displaying a series of sterilization steps. The series of sterilization steps includes heating by a sterilization heater (4) and sterilization at a set sterilization temperature (dissolution of the culture medium). There is a method of evacuating the pressure in the chamber and drying the chamber after the evacuation. Depending on the type of the culture medium, the temperature can be maintained after the evacuation.
【００１９】（２７）は現在温度、滅菌設定温度、溶解
温度の温度表示器、（２８）は乾燥時での残り時間を表
示する残時間表示器、（２９）は排気温度、保温温度の
温度表示と自動滅菌開始を行う場合の滅菌開始予約時間
の表示を行う温度時間表示器、（３０）はモードの変更
により滅菌温度の設定と前記排気バルブ（１２）の開放
する温度を設定する排気設定手段の機能を有する操作ス
イッチ（３１）（３１）を含む設定部、（３２）は前記
設定部（３０）のモードを変更するモード設定部、（３
３）は滅菌工程のコースを設定するコース設定部、（３
４）は進行中の工程の動作を停止するストップ釦、（３
５）は前記ロックレバー（２４）のロック解除を禁止す
るレバーロック表示部、（３６）は一連の滅菌工程の進
行の開始するスタート釦である。(27) is a temperature indicator for the current temperature, the set sterilization temperature and the dissolution temperature, (28) is a remaining time indicator for displaying the remaining time during drying, and (29) is a temperature for the exhaust temperature and the heat retention temperature. A temperature / time indicator for displaying a display and a sterilization start reservation time when starting automatic sterilization, and (30) an exhaust setting for setting a sterilization temperature by changing a mode and setting a temperature at which the exhaust valve (12) is opened. A setting unit including operation switches (31) and (31) having a function of a means; (32) a mode setting unit for changing a mode of the setting unit (30);
3) a course setting section for setting a course of the sterilization process;
4) a stop button for stopping the operation of the process in progress;
5) is a lever lock display section for prohibiting unlocking of the lock lever (24), and (36) is a start button for starting the progress of a series of sterilization steps.
【００２０】次に図５のブロック図を簡単に設定する。
（３７）は濡電ブレーカー、（３８）、（３９）、（４
０）は電流ヒューズ、（４１）は電源トランス、（４
２）は後述するマイコン等の駆動電源を得る電源回路、
（４３）は全波整流回路、（４４）は前記電源回路（４
２）により動作する制御回路（以下制御マイコン部とす
る）、（４５）は滅菌ヒータ（４）の発熱量を制御する
ヒータ制御回路、（４６）は前記ヒータ制御回路（４
５）の出力により変位するバイメタルで、前記滅菌ヒー
タ（４）の通断電を行う。Next, the block diagram of FIG. 5 will be simply set.
(37) is a wet breaker, (38), (39), (4)
0) is a current fuse, (41) is a power transformer, and (4)
2) a power supply circuit for obtaining a drive power supply for a microcomputer or the like to be described later;
(43) is a full-wave rectifier circuit, and (44) is the power supply circuit (4).
A control circuit (hereinafter referred to as a control microcomputer unit) operated by 2), (45) a heater control circuit for controlling the amount of heat generated by the sterilizing heater (4), and (46) a heater control circuit (4)
The bimetal that is displaced by the output of 5) turns on and off the sterilization heater (4).
【００２１】（４７）は前記排水バルブ（１２）を駆動
する電磁バルブ制御回路、（４８）は前記ロックレバー
（２４）をロック／アンロックを行うソレノイド、（４
９）は前記ソレノイドの制御回路、（５０）は制御マイ
コン部（４４）を作動させるタイムベース回路、（５
１）は前記操作スイッチ（３１）、（３１）の検出回
路、（５２）は前記温度表示器（２７）、残時間表示器
（２８）、温度／時間表示器（２９）を総称したＬＥＤ
表示回路、（５３）は前記検出回路（５１）及びＬＥＤ
表示回路（５２）と制御マイコン部（４４）との間に接
続した表示マイコン部、（５４）は前記操作スイッチ
（３１）等の設定内容や工程の進行状態を記憶する不揮
発性メモリ、（５５）は前記底センサー（２１）による
検出温度が異常かどうかを検出する異常温度検出回路、
（５６）は前記横サーミスタ（５）による温度検出回
路、（５７）は図３では図示していないが前記チャンバ
ー（２）内の圧力検出センサー、（５８）は前記圧力検
出センサーによる圧力検出回路、（５９）、（６０）は
前記蓋体（２２）が開放しているか否かと閉塞している
か否かを検出する第１フタスイッチと第２フタスイッ
チ、（６１）は前記各フタスイッチの検出回路、（６
２）は例えば滅菌工程の終了時に報知するブザー回路、
（６３）は制御マイコン部（４４）の動作を強制的に解
除するリセット回路、（６４）は電源電圧の低下検出回
路である。(47) an electromagnetic valve control circuit for driving the drain valve (12); (48) a solenoid for locking / unlocking the lock lever (24);
9) is a control circuit of the solenoid, (50) is a time base circuit for operating the control microcomputer section (44), (5)
1) is a detection circuit for the operation switches (31) and (31), and (52) is an LED that collectively refers to the temperature display (27), the remaining time display (28), and the temperature / time display (29).
A display circuit; (53) a detection circuit (51) and an LED;
A display microcomputer section connected between the display circuit (52) and the control microcomputer section (44); (54) a non-volatile memory for storing setting contents of the operation switches (31) and the like and a progress state of the process; ) Is an abnormal temperature detection circuit for detecting whether the temperature detected by the bottom sensor (21) is abnormal,
(56) is a temperature detection circuit using the horizontal thermistor (5), (57) is a pressure detection sensor in the chamber (2) not shown in FIG. 3, and (58) is a pressure detection circuit using the pressure detection sensor. , (59) and (60) are first and second lid switches for detecting whether the lid (22) is open and closed, and (61) is for each of the lid switches. Detection circuit, (6
2) a buzzer circuit for notifying at the end of the sterilization process,
(63) is a reset circuit for forcibly canceling the operation of the control microcomputer unit (44), and (64) is a power supply voltage drop detection circuit.
【００２２】次に培地の滅菌動作について述べる。先
ず、ダーラム管による培地滅菌の準備について、図６に
示す様に小試験管（６５）内にペプトン水（６６）を入
れ、培地の入ったダーラム管（６７）を栓をした状態で
前記小試験管（６６）内に逆さにして収容すると共に、
小試験管（６５）を殺菌綿栓（６８）を行う。Next, the sterilizing operation of the medium will be described. First, as for preparation of medium sterilization using a Durham tube, as shown in FIG. 6, peptone water (66) was put into a small test tube (65), and the durham tube (67) containing the medium was plugged. While being stored upside down in a test tube (66),
A small test tube (65) is sterilized with a cotton plug (68).
【００２３】ロックレバー（２４）を移動させ蓋体（２
２）を開放して開閉蓋（２３）を開けチャンバー（２）
の開口部（３）より所定量の水を注水すると共に、前述
のダーラム管（６７）の入った小試験管（６５）をチャ
ンバー内に収納配置する。Move the lock lever (24) to move the lid (2).
Open 2) and open the lid (23) to open the chamber (2)
A predetermined amount of water is injected from the opening (3), and the small test tube (65) containing the aforementioned Durham tube (67) is housed and arranged in the chamber.
【００２４】その後、蓋体（２２）を閉塞して開閉蓋
（２３）により開口部（３）を密閉し、モード設定部
（３２）を操作して滅菌設定温度を１２１度に設定し、
この設定温度は温度表示器（２７）により表示させて確
認する。Thereafter, the lid (22) is closed, the opening (3) is closed with the opening / closing lid (23), and the set sterilization temperature is set to 121 degrees by operating the mode setting section (32).
This set temperature is confirmed by displaying it on the temperature display (27).
【００２５】つづいて、モード設定部（３２）を操作し
操作スイッチ（３１）により、培地の種類に応じた排気
温度の設定、即ち、排気バルブ（１２）の開放時の温度
を設定するわけであるが、一般的には培地の種類に応じ
た排気温度の設定範囲は、上限温度が１１５度、下限温
度が１１０度であり、この間は１度毎に設定できる。但
し、前述の上限は、一般的には、通常設定されることの
多い滅菌設定温度１２１度以下であり、下限は水が沸騰
する温度である沸点（１００度）よりも高い温度とな
る。Subsequently, the mode setting section (32) is operated and the operation switch (31) is used to set the exhaust temperature according to the type of the culture medium, that is, the temperature when the exhaust valve (12) is opened. However, in general, the setting range of the exhaust temperature according to the type of the culture medium is 115 ° C. for the upper limit temperature and 110 ° C. for the lower limit temperature. However, the above-mentioned upper limit is generally a sterilization set temperature of 121 ° C. or less, which is often set, and the lower limit is a temperature higher than the boiling point (100 ° C.) at which water boils.
【００２６】このことは、例えば、培地の種類によって
排気温度を上限に近い温度に設定した場合には、滅菌工
程の終了後の短時間の間に排気バルブ（１２）を開放さ
せて一連の滅菌工程を短縮することができ、反対に下限
に近い温度に設定した場合では上限に近い温度に設定し
た場合に比べて一連の滅菌工程の十分な時間短縮を行う
ことはできないが、自動的に排気動作を行うことができ
ることになる。This means that, for example, when the exhaust temperature is set to a temperature close to the upper limit depending on the type of the culture medium, the exhaust valve (12) is opened within a short time after the end of the sterilization step to perform a series of sterilization. The process can be shortened.On the other hand, when the temperature is set near the lower limit, the time required for a series of sterilization steps cannot be reduced sufficiently compared to when the temperature is set near the upper limit. The operation can be performed.
【００２７】今、仮に、図１のＡに示す様に排気温度を
上限の１１５度に設定し、滅菌時間を例えば２０分に設
定した場合について述べる。スタンバイ状態からスター
ト釦（３６）を操作して滅菌ヒータ（４）に通電して水
の加熱を行ない、チャンバー（２）内の空気や水分を圧
力抜き弁（９）により外部に排出する。チャンバー内の
温度が上昇してチャンバー内が１２１度に達すると、前
記圧力抜き弁（９）が閉止し飽和蒸気圧となって滅菌工
程を実行する。Now, a case will be described in which the exhaust temperature is set to the upper limit of 115 degrees and the sterilization time is set to, for example, 20 minutes as shown in FIG. 1A. From the standby state, the start button (36) is operated to energize the sterilization heater (4) to heat the water, and air and moisture in the chamber (2) are discharged to the outside by the pressure release valve (9). When the temperature inside the chamber rises and reaches 121 ° C. in the chamber, the pressure relief valve (9) closes to reach a saturated vapor pressure, and a sterilization process is performed.
【００２８】やがて、２０分の滅菌時間が終了し、滅菌
ヒータ（４）の発熱を停止し、チャンバー（２）内を自
然冷却させることによりチャンバー内温度が徐々に低下
する。Eventually, the sterilization time of 20 minutes ends, the heat generation of the sterilization heater (4) is stopped, and the inside of the chamber (2) is naturally cooled, whereby the temperature in the chamber gradually decreases.
【００２９】もし、従来の様に排気バルブが手動式であ
って、仮に排気バルブの操作を忘れた場合には、チャン
バー内の温度が図１の破線の様に緩やかに低下し一連の
滅菌工程に要する時間が長くなる。If the exhaust valve is manually operated as in the prior art, and if the operation of the exhaust valve is forgotten, the temperature in the chamber gradually decreases as shown by the broken line in FIG. Takes longer.
【００３０】しかしながら、本発明の実施例では排気温
度を図１のＡ点に設定しているため、滅菌工程が終了し
チャンバー内が若干低下し１１５度に達した時に自動的
に排気バルブ（１２）が徐々に開放しチャンバー（２）
内の圧力を排気パイプ（１１）、導出パイプ（１４）を
介して排気タンク（１５）内に排気する。この結果、図
１の実線で示す様に完了温度までの時間（一連の滅菌工
程の所要時間）が短縮される。However, in the embodiment of the present invention, since the exhaust temperature is set to the point A in FIG. 1, the exhaust valve (12) is automatically turned off when the sterilization process is completed and the inside of the chamber slightly drops to 115 degrees. ) Gradually opened and chamber (2)
The internal pressure is exhausted into an exhaust tank (15) via an exhaust pipe (11) and an outlet pipe (14). As a result, as shown by the solid line in FIG. 1, the time to the completion temperature (the time required for a series of sterilization steps) is reduced.
【００３１】また、培地の種類により排気温度を図１に
示すＢ点の１１３点に設定した場合には、前述の様に滅
菌工程が終了し、チャンバー内温度が１１３度まで低下
した時に排気バルブ（１２）が徐々に開放し完了温度ま
での時間を短縮する。When the exhaust temperature is set at 113 point B shown in FIG. 1 depending on the type of the culture medium, the sterilization process is completed as described above, and the exhaust valve is set when the temperature in the chamber is reduced to 113 degrees. (12) is gradually opened to shorten the time until the completion temperature.
【００３２】[0032]
【発明の効果】以上の様に本発明は、滅菌工程終了後の
チャンバー内が沸点温度以上の任意の温度に設定して排
気バルブの開放を行いチャンバー内の圧力を排気するも
のであるから、従来の様に使用者が滅菌工程の終了後に
チャンバー内の温度を見ながら手動で排気バルブを操作
するものに比べて設定された排気温度になると自動的に
排気バルブが開放するため手間がかからず滅菌時間が短
くなると共に使用者が滅菌器の傍についている必要がな
くなる。As described above, according to the present invention, the pressure inside the chamber is evacuated by opening the exhaust valve by setting the inside of the chamber after the sterilization step to an arbitrary temperature equal to or higher than the boiling point temperature. Compared to the conventional method where the user operates the exhaust valve manually while checking the temperature inside the chamber after the end of the sterilization process, the exhaust valve opens automatically when the set exhaust temperature reaches the set value. The sterilization time is shortened and the user does not need to be near the sterilizer.
【００３３】特に、使用者が手動で排気バルブを開放す
ることがないから、仮に排気バルブの操作を忘れてた時
には一連の滅菌時間を長くなるといったことがない。In particular, since the user does not manually open the exhaust valve, if the operation of the exhaust valve is forgotten, a series of sterilization times will not be lengthened.
【００３４】さらに、排気バルブの開放温度は、チャン
バー内の沸点温度よりも高く、且つ滅菌設定温度よりも
低い温度の間の任意の温度に設定するものであるから、
どのような排気温度に設定されていても沸点温度以上の
時に排気するため、ダーラム管内に気泡が残らず所望の
滅菌効果を上げることができる。加えて、滅菌設定温度
は滅菌物によって設定内容が変更されるが、常に排気バ
ルブの排気温度を滅菌設定温度以下になるようにしてい
ることから、滅菌工程が終了していないのにも拘らず排
気バルブが開放して十分な滅菌ができないことか、滅菌
温度のような高温高圧の状態の時に排気バルブが開放し
て滅菌物が突沸を起して吹きこぼれる等の危険がなくな
る。Further, the opening temperature of the exhaust valve is set to an arbitrary temperature between a temperature higher than the boiling point in the chamber and lower than the sterilization set temperature.
Whatever the exhaust temperature is set, the gas is exhausted when the temperature is equal to or higher than the boiling point temperature, so that no air bubbles remain in the durham tube and the desired sterilization effect can be improved. In addition, although the set contents of the sterilization temperature are changed depending on the sterilized material, since the exhaust temperature of the exhaust valve is always set to be equal to or lower than the sterilization set temperature, even though the sterilization process is not completed, There is no danger that the exhaust valve is opened and sufficient sterilization cannot be performed, or that the exhaust valve is opened when the temperature is high and high, such as the sterilization temperature, and the sterilized product is bumped and spilled.
【図１】本発明の蒸気滅菌器の要部を示すタイムチャー
トである。FIG. 1 is a time chart showing a main part of a steam sterilizer of the present invention.
【図２】同じく外観斜視図である。FIG. 2 is an external perspective view of the same.
【図３】同じく配管図である。FIG. 3 is a piping diagram similarly.
【図４】同じく操作表示部の平面図である。FIG. 4 is a plan view of the operation display unit.
【図５】同じくブロック図である。FIG. 5 is also a block diagram.
【図６】同じく滅菌対象物としてのダーラム管を示す説
明図である。FIG. 6 is an explanatory view showing a Durham tube as an object to be sterilized.
１ 滅菌器本体 ２ チャンバー ４ 滅菌ヒータ ５ 温度センサー １２ 排気バルブ １５ 排気タンク ３１ 排気設定手段（操作スイッチ） ４４ 制御部（制御マイコン部） DESCRIPTION OF SYMBOLS 1 Sterilizer main body 2 Chamber 4 Sterilization heater 5 Temperature sensor 12 Exhaust valve 15 Exhaust tank 31 Exhaust setting means (operation switch) 44 Control part (Control microcomputer part)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西川 耕一 鳥取県鳥取市南吉方３丁目201番地 鳥取 三洋電機株式会社内 (72)発明者 米山 正 鳥取県鳥取市南吉方３丁目201番地 鳥取 三洋電機株式会社内 (72)発明者 川田 憲一 鳥取県鳥取市南吉方３丁目201番地 鳥取 三洋電機株式会社内 (72)発明者 浜田 潮 鳥取県鳥取市南吉方３丁目201番地 鳥取 三洋電機株式会社内 Ｆターム(参考） 4C058 AA15 BB05 CC03 DD02 DD04 DD13 DD20 EE12 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Koichi Nishikawa 3-201 Minamiyoshikata, Tottori-shi, Tottori Sanyo Electric Co., Ltd. (72) Inventor Tadashi Yoneyama 3-201 Minamiyoshikata, Tottori-shi, Tottori Sanyo Tottori Inside (72) Inventor Kenichi Kawata 3-201 Minamiyoshikata, Tottori-shi, Tottori Sanyo Electric Co., Ltd. (72) Inventor Shio Hamada 3-201, Minamiyoshikata, Tottori-shi, Tottori Sanyo Electric Tottori F Terms (reference) 4C058 AA15 BB05 CC03 DD02 DD04 DD13 DD20 EE12
Claims (2)
するチャンバーと、前記チャンバー内と大気とを連通し
てチャンバー内の圧力を抜く排気バルブと、前記チャン
バー内の温度を検出する温度センサーと、前記温度セン
サーによる検出温度に基づいて前記排気バルブを閉止状
態或は開放状態にする制御回路と、前記制御回路に接続
され滅菌工程終了後の前記チャンバー内が沸点温度以上
の任意の温度に設定して前記排気バルブの開放を行う排
気設定手段を設けたことを特徴とする蒸気滅菌器。1. A chamber for containing a sterile material and maintaining the inside at a saturated vapor pressure, an exhaust valve for communicating the inside of the chamber with the atmosphere to release the pressure in the chamber, and a temperature for detecting a temperature in the chamber. A sensor, a control circuit that closes or opens the exhaust valve based on the temperature detected by the temperature sensor, and an arbitrary temperature that is connected to the control circuit and is equal to or higher than the boiling point temperature in the chamber after the end of the sterilization process. An exhaust setting means for opening the exhaust valve by setting the exhaust valve to a steam sterilizer.
放温度は、チャンバー内の沸点温度よりも高く、且つ滅
菌設定温度よりも低い温度の間の任意の温度に設定する
ことを特徴とする請求項１に記載の蒸気滅菌器。2. The method according to claim 1, wherein an opening temperature of the exhaust valve by the exhaust setting means is set to an arbitrary temperature between a boiling point temperature in the chamber and a temperature lower than a sterilization setting temperature. 2. The steam sterilizer according to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08923399A JP3643723B2 (en) | 1999-03-30 | 1999-03-30 | Steam sterilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08923399A JP3643723B2 (en) | 1999-03-30 | 1999-03-30 | Steam sterilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000279490A true JP2000279490A (en) | 2000-10-10 |
| JP3643723B2 JP3643723B2 (en) | 2005-04-27 |
Family
ID=13965040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08923399A Expired - Lifetime JP3643723B2 (en) | 1999-03-30 | 1999-03-30 | Steam sterilizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3643723B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008023225A (en) * | 2006-07-25 | 2008-02-07 | Sanyo Electric Co Ltd | Steam sterilizer |
| JP2011152466A (en) * | 2011-05-17 | 2011-08-11 | Sanyo Electric Co Ltd | Steam sterilizer |
-
1999
- 1999-03-30 JP JP08923399A patent/JP3643723B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008023225A (en) * | 2006-07-25 | 2008-02-07 | Sanyo Electric Co Ltd | Steam sterilizer |
| JP2011152466A (en) * | 2011-05-17 | 2011-08-11 | Sanyo Electric Co Ltd | Steam sterilizer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3643723B2 (en) | 2005-04-27 |
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