JP2012217391A - Heat sterilization device - Google Patents

Heat sterilization device Download PDF

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JP2012217391A
JP2012217391A JP2011086859A JP2011086859A JP2012217391A JP 2012217391 A JP2012217391 A JP 2012217391A JP 2011086859 A JP2011086859 A JP 2011086859A JP 2011086859 A JP2011086859 A JP 2011086859A JP 2012217391 A JP2012217391 A JP 2012217391A
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temperature
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JP5794616B2 (en
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Nobuyuki Matsushima
延幸 松島
Katsuhisa Nakada
勝久 中田
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SAMSON CO Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

PROBLEM TO BE SOLVED: To provide a heat sterilization device for performing heat sterilization of packaged foods, wherein the heat sterilization device is enabled to perform low cost control of the steam supply amount.SOLUTION: There is provided a heat sterilization device, which performs heat sterilization of objects 2 to be sterilized, by injecting high temperature water to the objects to be sterilized and in a sterilization vessel 1, and is a heat sterilization device detecting the temperature in the sterilization vessel to control the steam supply amount to the high temperature water so that the temperature in the sterilization vessel is the desired value, wherein a steam introduction control device 6 controlling the steam supply amount is provided by setting in series a full open/full shut control valve 6A opened and closed at two positions of full open and full close and a full open/minute open control valve 6B opened and closed at two positions of full open and minute open, and the steam introduction control device 6 performs open and close control of the full open/full shut control valve 6A and the full open/minute open control valve 6B based on the current temperature in the vessel and the calculated estimate of the temperature in the vessel after a predetermined time.

Description

本発明は缶詰やレトルト食品など、食品を包装容器に収容した後に、包装容器内の食品を加熱殺菌する加熱殺菌装置に関するものである。   The present invention relates to a heat sterilization apparatus that heats and sterilizes food in a packaging container after the food such as canned food or retort food is stored in the packaging container.

缶詰やレトルト食品は、密封包装後に容器ごしに内部食品の加熱殺菌を行うことで、常温での長期保存を可能にしている。加熱殺菌を行う場合、殺菌槽内に被殺菌物を収容しておき、被殺菌物に高温の循環水を噴射することで被殺菌物を加熱する。被殺菌物に対する加熱に過不足があると、十分な殺菌が行われないことによって腐敗が発生したり、過剰な加熱によって食品に変質が発生することがあるため、精密な加熱制御を行う必要がある。加熱殺菌装置では、殺菌槽内の温度を検出しておき、槽内温度が目標値となるように加熱量の調節を行う。槽内温度が目標値よりも低い場合には噴射している循環水の温度を上昇させることで槽内温度を高くし、槽内温度が目標値よりも高い場合には噴射している循環水の温度を低下させることで槽内温度を低くして、温度の調節を行っている。循環水を加熱する熱源としては蒸気が一般的であり、循環水に供給する蒸気量を増加すると循環水の温度は上昇し、蒸気の供給を停止すると循環水の温度は低下する。   Canned and retort food products can be stored at room temperature for a long period of time by heat-sterilizing the internal food in a container after sealed packaging. When heat sterilization is performed, an object to be sterilized is stored in a sterilization tank, and the object to be sterilized is heated by spraying high-temperature circulating water onto the object to be sterilized. If there is an excess or deficiency in the heating of the object to be sterilized, it will be necessary to carry out precise heating control because it may cause spoilage due to insufficient sterilization or alteration of food due to excessive heating. is there. In the heat sterilizer, the temperature in the sterilization tank is detected, and the amount of heating is adjusted so that the temperature in the tank becomes a target value. When the temperature in the tank is lower than the target value, the temperature in the tank is increased by increasing the temperature of the circulating water being injected, and when the temperature in the tank is higher than the target value, the circulating water being injected is increased. The temperature in the tank is lowered by lowering the temperature, and the temperature is adjusted. Steam is generally used as a heat source for heating the circulating water. When the amount of steam supplied to the circulating water is increased, the temperature of the circulating water increases, and when the supply of steam is stopped, the temperature of the circulating water decreases.

特開平７−２３１７７０号公報には、アナログ圧力調整弁を設けておき、アナログ圧力調整弁の開度を調整することで蒸気供給量の制御を行うことが記載されている。蒸気必要量に合わせて開度を逐次制御すると、蒸気必要量分の蒸気を供給することができる。しかし開度を比例的に制御することのできる調整弁はコストが高いという問題があった。そのため、蒸気導入管に並列部を設け、開閉２位置で制御する制御弁であって口径の異なる複数の制御弁を並列部のそれぞれに設置しておき、蒸気必要量に応じて開く弁を選択することで蒸気供給量を制御することも行われている。この場合、制御弁は開閉２位置の安価なものが使用できるために蒸気導入制御装置のコストを低下しながら、蒸気供給量を段階的に増減することができる。ただしこの場合でも、蒸気導入管に並列部を設ける必要があるため、この部分ではコストが上昇することになる。    Japanese Patent Application Laid-Open No. 7-231770 describes that an analog pressure regulating valve is provided and the steam supply amount is controlled by adjusting the opening of the analog pressure regulating valve. When the opening degree is sequentially controlled according to the required amount of steam, it is possible to supply steam for the required amount of steam. However, the adjustment valve that can control the opening degree proportionally has a problem of high cost. For this reason, a parallel part is provided in the steam inlet pipe, and control valves that are controlled at two positions of opening and closing, and a plurality of control valves having different calibers are installed in each of the parallel parts, and a valve that is opened according to the required amount of steam is selected. Thus, the steam supply amount is also controlled. In this case, since an inexpensive control valve having two open / close positions can be used, the steam supply amount can be increased or decreased step by step while reducing the cost of the steam introduction control device. However, even in this case, since it is necessary to provide a parallel part in the steam introduction pipe, the cost increases in this part.

特開平７−２３１７７０号公報JP-A-7-231770

本発明が解決しようとする課題は、包装食品の加熱殺菌する加熱殺菌装置において、低コストで蒸気供給量の調節を可能とした加熱殺菌装置を提供することにある。   The problem to be solved by the present invention is to provide a heat sterilization apparatus capable of adjusting a steam supply amount at low cost in a heat sterilization apparatus for heat sterilization of packaged food.

請求項１に記載の発明は、殺菌槽内の被殺菌物に高温水を噴射することで被殺菌物を加熱殺菌する加熱殺菌装置であって、殺菌槽内の温度を検出し、殺菌槽内温度が目標値になるように前記高温水に対する蒸気供給量を制御している加熱殺菌装置において、蒸気供給量を制御する蒸気導入制御装置は、全開と全閉の二位置で開閉する全開／全閉制御弁及び全開と微少開の二位置で開閉する全開／微少開制御弁を直列に設置しておき、蒸気導入制御装置は、現時点での槽内温度や演算で求めた所定時間後における槽内温度の予想値に基づき、全開／全閉制御弁及び全開／微少開制御弁の開閉制御を行うものであることを特徴とする。   The invention according to claim 1 is a heat sterilization apparatus that heats and sterilizes an object to be sterilized by spraying high-temperature water onto the object to be sterilized in the sterilization tank, and detects the temperature in the sterilization tank. In the heat sterilization apparatus that controls the steam supply amount for the high-temperature water so that the temperature becomes the target value, the steam introduction control device for controlling the steam supply amount is fully opened / fully opened / closed at two positions of fully open and fully closed. A closed control valve and a full open / micro open control valve that opens and closes in two positions, full open and micro open, are installed in series, and the steam introduction control device uses the current temperature in the tank and the tank after a predetermined time determined by calculation. Based on the predicted value of the internal temperature, the full open / full close control valve and the full open / small open control valve are controlled to open and close.

請求項２に記載の発明は、前記の加熱殺菌装置において、蒸気導入制御は、目標温度と目標温度を含む所定の幅を持った目標温度帯を設定しておき、現在の槽内温度が目標温度未満であると全開／全閉制御弁を全開、目標温度よりも高いと全開／全閉制御弁を全閉とし、現在の槽内温度が目標温度帯の下限値未満であり、かつ所定時間後の予測温度も目標温度帯の下限未満であった場合には全開／微少開制御弁を全開とし、それ以外の場合には全開／微少開制御弁を微少開とするものであることを特徴とする。   According to a second aspect of the present invention, in the heat sterilization apparatus, the steam introduction control sets a target temperature zone having a predetermined width including the target temperature and the target temperature, and the current temperature in the tank is the target. If the temperature is less than the temperature, the fully open / closed control valve is fully opened. If the temperature is higher than the target temperature, the fully open / closed control valve is fully closed. If the predicted temperature after that is less than the lower limit of the target temperature range, the fully open / slightly open control valve is fully opened; otherwise, the fully open / slightly open control valve is slightly opened. And

二位置で開閉する制御弁を直列に接続した場合、安価な制御弁を使用することができ、配管を並列化することもないために、蒸気導入制御装置のコストを低減することができる。そして現在の槽内温度に加えて、所定時間後における槽内温度の予想値に基づき、全開／全閉制御弁及び全開／微少開制御弁の開閉制御を行うものであるため、目標温度に対する槽内温度のオーバーシュート及びアンダーシュートが大きくなることを防止することができる。   When control valves that open and close at two positions are connected in series, an inexpensive control valve can be used, and pipes are not arranged in parallel, so the cost of the steam introduction control device can be reduced. And, in addition to the current tank temperature, based on the predicted value of the tank temperature after a predetermined time, the opening / closing control of the fully open / fully closed control valve and the fully open / microopen control valve is performed. It is possible to prevent the overshoot and undershoot of the internal temperature from increasing.

本発明を実施すると、低コストの蒸気導入制御装置によって槽内温度のオーバーシュートやアンダーシュートが少なくなるように蒸気導入量を調節することができる。   When the present invention is implemented, the steam introduction amount can be adjusted by the low-cost steam introduction control device so that the overshoot and undershoot of the temperature in the tank are reduced.

本発明を実施している加熱殺菌装置のフロー図Flow diagram of a heat sterilizer embodying the present invention 本発明の一実施例での槽内温度と蒸気供給量の関係を説明する説明図Explanatory drawing explaining the relationship between the tank internal temperature and steam supply amount in one Example of this invention. 本発明の一実施例での槽内温度と蒸気供給量の関係を説明する説明図Explanatory drawing explaining the relationship between the tank internal temperature and steam supply amount in one Example of this invention.

本発明の一実施例を図面を用いて説明する。図１は本発明を実施している加熱殺菌装置のフロー図、図２と図３は槽内温度と蒸気供給量の関係を説明する説明図である。加熱殺菌装置は、円筒形の殺菌槽１内に缶詰やレトルト食品などの被殺菌物２を収容しておき、殺菌槽１内で被殺菌物２を加熱することで殺菌を行うものである。殺菌槽１の下部には、蒸気を導入する蒸気導入管３と給水を導入する給水導入管５を接続している。蒸気導入管３には蒸気導入制御装置６を設けており、蒸気導入制御装置６には全開／全閉制御弁６Ａと全開／微少開制御弁６Ｂを直列に設置している。給水導入管５には給水制御弁７を設けており、各制御弁の開閉を制御することで殺菌槽１内への蒸気と給水の導入を制御する。殺菌槽１の底部には循環配管８を接続しており、循環配管８の他端は殺菌槽内に設けている噴射ノズル９と接続している。循環配管８の途中に循環ポンプ４を設けており、循環ポンプ４を作動すると殺菌槽１底部の水は循環配管８を通して噴射ノズル９へ送られ、噴射ノズル９から殺菌槽１内へ循環水を噴射する。殺菌槽１の上部には槽内温度を検出する槽内温度検出器１１を設けておく。蒸気導入制御装置６、給水制御弁７、循環ポンプ４の作動は、運転制御装置１０によって制御するようにしており、運転制御装置１０は槽内温度検出器１１とも接続している。   An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a flow diagram of a heat sterilization apparatus embodying the present invention, and FIGS. 2 and 3 are explanatory diagrams for explaining the relationship between the temperature in the tank and the amount of steam supplied. The heat sterilization apparatus sterilizes the object to be sterilized 2 such as canned food or retort food in the cylindrical sterilization tank 1 and heats the object to be sterilized 2 in the sterilization tank 1. A steam introduction pipe 3 for introducing steam and a feed water introduction pipe 5 for introducing feed water are connected to the lower part of the sterilization tank 1. The steam introduction pipe 3 is provided with a steam introduction control device 6, and the steam introduction control device 6 is provided with a fully open / fully closed control valve 6A and a fully open / microopen control valve 6B in series. A water supply control valve 7 is provided in the water supply introduction pipe 5, and the introduction of steam and water supply into the sterilization tank 1 is controlled by controlling the opening and closing of each control valve. A circulation pipe 8 is connected to the bottom of the sterilization tank 1, and the other end of the circulation pipe 8 is connected to an injection nozzle 9 provided in the sterilization tank. A circulation pump 4 is provided in the middle of the circulation pipe 8. When the circulation pump 4 is operated, water at the bottom of the sterilization tank 1 is sent to the injection nozzle 9 through the circulation pipe 8, and the circulation water is supplied from the injection nozzle 9 into the sterilization tank 1. Spray. In the upper part of the sterilization tank 1, an in-tank temperature detector 11 for detecting the in-tank temperature is provided. The operation of the steam introduction control device 6, the water supply control valve 7 and the circulation pump 4 is controlled by the operation control device 10, and the operation control device 10 is also connected to the in-tank temperature detector 11.

蒸気導入制御装置６を構成している全開／全閉制御弁６Ａと全開／微少開制御弁６Ｂは、それぞれ開閉２位置での操作を行う制御弁である。全開／全閉制御弁６Ａの場合、全開と全閉の２位置で操作するが、全開／微少開制御弁６Ｂは開度調整機構付の制御弁であり、閉じた場合でも弁を完全に閉じるのではなく、少量の蒸気を通過させる微少開となるようにしている。   The full opening / full closing control valve 6A and the full opening / small opening control valve 6B constituting the steam introduction control device 6 are control valves that perform operations at two positions of opening and closing, respectively. In the case of the fully open / fully closed control valve 6A, the valve is operated in two positions, fully open and fully closed. However, the fully open / micro open control valve 6B is a control valve with an opening adjustment mechanism, and even when closed, the valve is completely closed. Instead, it is designed to be slightly open allowing a small amount of steam to pass through.

被殺菌物２の加熱殺菌を行う場合、ます被殺菌物２をトレイに並べ、トレイを積み重ねた状態で殺菌槽１内に収容しておく。次に殺菌槽１の底部へ水を導入しておき、底部にためた水に蒸気を吹き込むことで水を加熱して高温とし、循環ポンプ４を作動することで噴射ノズル９から被殺菌物２へ向けて高温の循環水を噴射する。加熱殺菌では、被殺菌物２を殺菌温度まで上昇させる昇温工程、被殺菌物２を殺菌温度に維持する加熱工程、被殺菌物２を冷却する冷却工程を行う。昇温工程及び加熱工程では、蒸気導入管３からの蒸気供給を行うと噴射ノズル９から噴射する循環水の温度が上昇、蒸気供給を停止すると循環水温度は低下することになり、冷却工程では給水導入管５から冷却用水を導入し、循環水の温度を低下させて被殺菌物２の冷却を行う。   When performing the heat sterilization of the article 2 to be sterilized, the article 2 to be sterilized is arranged in a tray and stored in the sterilization tank 1 with the trays stacked. Next, water is introduced into the bottom of the sterilization tank 1, and steam is blown into the water accumulated in the bottom to heat the water to a high temperature. Inject hot circulating water toward In the heat sterilization, a temperature raising process for raising the article to be sterilized 2 to the sterilization temperature, a heating process for maintaining the article to be sterilized 2 at the sterilization temperature, and a cooling process for cooling the article to be sterilized 2 are performed. In the temperature raising process and the heating process, when steam is supplied from the steam introduction pipe 3, the temperature of the circulating water injected from the injection nozzle 9 is increased, and when the steam supply is stopped, the circulating water temperature is decreased. Cooling water is introduced from the feed water introduction pipe 5, and the temperature of the circulating water is lowered to cool the article to be sterilized 2.

運転制御装置１０には、運転開始からの経過時間とその時の槽内温度の目標値を設定しておき、槽内温度検出器１１で検出している槽内温度が目標温度になるように、蒸気導入の制御を行うことで温度調節を行う。殺菌槽１への蒸気供給を行うと殺菌槽内底部にためておいた水の温度が上昇し、噴射ノズル９から噴射している循環水温度が上昇すると、殺菌槽１内の温度が上昇する。逆に殺菌槽１への蒸気供給を停止すると殺菌槽内底部の水温が低下し、噴射ノズル９から噴射している噴射水温度が低下するため、殺菌槽１内の温度が低下する。被殺菌物２へ噴射している水の温度変化は、波及的に広がっていくものであるため、蒸気導入制御弁６を閉じて蒸気供給を停止してもしばらくの間は槽内温度の上昇が続き、蒸気導入制御弁６を開いて蒸気供給を開始してもしばらくの間は槽内温度の低下が続くことになる。そのため、槽内温度が目標温度に到達したことを検出して蒸気導入制御装置６の操作を行った場合、槽内温度は目標温度を通り過ぎるために、槽内温度を目標値に保つことができないということになる。   In the operation control device 10, an elapsed time from the start of operation and a target value of the temperature in the tank at that time are set, and the temperature in the tank detected by the temperature sensor 11 in the tank is set to the target temperature. Temperature control is performed by controlling the introduction of steam. When steam is supplied to the sterilization tank 1, the temperature of the water stored in the bottom of the sterilization tank rises, and when the circulating water temperature sprayed from the injection nozzle 9 rises, the temperature in the sterilization tank 1 rises. . Conversely, when the supply of steam to the sterilization tank 1 is stopped, the water temperature at the bottom of the sterilization tank decreases and the temperature of the spray water sprayed from the spray nozzle 9 decreases, so the temperature in the sterilization tank 1 decreases. Since the temperature change of the water sprayed on the article to be sterilized 2 spreads spilloverly, even if the steam introduction control valve 6 is closed and the steam supply is stopped, the temperature in the tank rises for a while. Then, even if the steam introduction control valve 6 is opened and steam supply is started, the temperature in the tank continues to decrease for a while. Therefore, when it is detected that the tank temperature has reached the target temperature and the steam introduction control device 6 is operated, the tank temperature passes the target temperature, so that the tank temperature cannot be maintained at the target value. It turns out that.

そこで運転制御装置１０は、現在の槽内温度に基づく蒸気供給量の制御と、槽内温度の変化速度から所定時間後の槽内温度予想値を演算で求め、蒸気供給量を前もって変化させることにより殺菌槽内温度のオーバーシュートやアンダーシュートを小さく抑える制御を行う。槽内温度の予想値は、現在の槽内温度と単位時間前の槽内温度を比較し、槽内温度の変化がその後も継続するとして、所定時間後の予想の槽内温度を算出することができる。   Therefore, the operation control device 10 obtains the predicted temperature in the tank after a predetermined time from the control of the steam supply amount based on the current temperature in the tank and the change speed of the temperature in the tank, and changes the steam supply amount in advance. The control which suppresses the overshoot and undershoot of the temperature in a sterilization tank small by this is performed. The predicted value of the tank temperature is calculated by comparing the current tank temperature with the tank temperature before unit time, and calculating the expected tank temperature after a predetermined time, assuming that the change in the tank temperature continues thereafter. Can do.

図２及び図３に記載しているように、運転制御装置１０では、一定の幅を持った目標温度帯（例えば目標温度−０.５℃から目標温度＋１℃の範囲）を維持するように蒸気供給量を制御する。運転制御装置１０は、槽内温度検出器１１で検出している現在の槽内温度が目標温度−０.５℃未満であると、全開／全閉制御弁６Ａを全開とし、全開／微少開制御弁６Ｂは全開又は微少開とする。全開／微少開制御弁６Ｂを全開とするか微少開とするかの判定は、所定時間後の予測温度に基づき決定する。現在の槽内温度とそれまでの温度変化率から演算によって所定時間後の予想温度を求め、予想温度も目標温度−０.５℃未満の場合には全開／微少開制御弁６Ｂを全開とし、予想温度では目標温度−０.５℃より高くなる場合には全開／微少開制御弁６Ｂを微少開とする。また、槽内温度検出器１１で検出している現在の槽内温度が目標温度−０.５℃から目標温度の間であると、全開／全閉制御弁６Ａを全開、全開／微少開制御弁６Ｂは微少開とし、現在の槽内温度が目標温度以上であると、全開／全閉制御弁６Ａを全閉、全開／微少開制御弁６Ｂは微少開とする。   As shown in FIGS. 2 and 3, the operation control device 10 maintains a target temperature zone having a certain width (for example, a range from target temperature −0.5 ° C. to target temperature + 1 ° C.). Control steam supply. When the current temperature in the tank detected by the tank temperature detector 11 is lower than the target temperature −0.5 ° C., the operation control device 10 opens the fully open / fully closed control valve 6A to fully open / smallly open. The control valve 6B is fully open or slightly open. Whether the fully open / microopen control valve 6B is fully open or slightly open is determined based on the predicted temperature after a predetermined time. The predicted temperature after a predetermined time is obtained by calculation from the current temperature inside the tank and the rate of change in temperature until then. If the predicted temperature is also less than the target temperature -0.5 ° C, the fully open / micro-open control valve 6B is fully opened, When the predicted temperature is higher than the target temperature -0.5 ° C, the fully open / slightly open control valve 6B is slightly opened. Further, when the current tank temperature detected by the tank temperature detector 11 is between the target temperature -0.5 ° C. and the target temperature, the fully open / fully closed control valve 6A is fully opened and fully opened / smallly opened. The valve 6B is slightly opened. If the current temperature in the tank is equal to or higher than the target temperature, the fully open / fully closed control valve 6A is fully closed, and the fully open / smallly opened control valve 6B is slightly opened.

全開／全閉制御弁６Ａを全開、全開／微少開制御弁６Ｂも全開とした場合、蒸気導入制御装置６での総合開度は大きくなり、殺菌槽１への蒸気供給量が多くなるため槽内温度は上昇する。全開／全閉制御弁６Ａを全開、全開／微少開制御弁６Ｂは微少開とした場合、蒸気導入管３を通して供給される蒸気量は、全開／微少開制御弁６Ｂの微少開分であるために蒸気導入制御装置６での総合開度は小さくなり、殺菌槽１への蒸気供給量が少なくなる。この場合でも殺菌槽１への蒸気導入を行っているため槽内温度は上昇しているが、上昇度は緩やかになる。なお、この実施例では微少開での蒸気供給量によって槽内温度は上昇しているが、微少開での開度は槽内温度が低下する蒸気供給量になるように設定する場合もある。全開／全閉制御弁６Ａを全閉、全開／微少開制御弁６Ｂは微少開とした場合、直列に接続している全開／全閉制御弁６Ａで全閉としているために蒸気導入制御装置６での総合開度は閉となり、殺菌槽１への蒸気供給は停止する。殺菌槽１では放熱による温度低下があるため、蒸気供給が停止すれば槽内温度は低下していく。   When the fully open / fully closed control valve 6A is fully opened and the fully open / microopen control valve 6B is also fully opened, the total opening in the steam introduction control device 6 becomes large, and the amount of steam supplied to the sterilization tank 1 increases. The internal temperature rises. When the fully open / fully closed control valve 6A is fully opened and the fully open / microopen control valve 6B is slightly open, the amount of steam supplied through the steam introduction pipe 3 is a minute opening of the fully open / microopen control valve 6B. In addition, the overall opening degree in the steam introduction control device 6 is reduced, and the amount of steam supplied to the sterilization tank 1 is reduced. Even in this case, since the steam is introduced into the sterilization tank 1, the temperature in the tank rises, but the degree of increase becomes moderate. In this embodiment, the inside temperature of the tank rises due to the amount of steam supplied when it is slightly opened, but the opening degree when it is slightly opened may be set to be the amount of steam supplied so that the inside temperature of the tank decreases. When the fully open / fully closed control valve 6A is fully closed and the fully open / slightly open control valve 6B is slightly open, the fully open / fully closed control valve 6A connected in series is fully closed. The total opening at is closed and the supply of steam to the sterilization tank 1 is stopped. Since the sterilization tank 1 has a temperature drop due to heat dissipation, the temperature in the tank decreases when the steam supply is stopped.

蒸気供給量の制御を、上記のように現在の槽内温度と所定時間後の予想温度を組み合わせて行うと、図３に記載のとおり、現時点での槽内温度は目標値−０.５℃よりも低い時刻ａの時点で蒸気供給量を減少することになる。図の実線で示した槽内温度は時刻ａの時点で全開／微少開制御弁６Ｂを微少開として蒸気供給量を減少した場合のもの、破線で示した槽内温度は検出温度が目標温度−０.５℃になってから蒸気供給量を減少した場合のものを示している。蒸気供給量を減少しても槽内温度が変化し始めるまでにはタイムラグがあるため、槽内温度が目標温度−０.５℃になるまで全開／微少開制御弁６Ｂを開として蒸気供給を継続していた場合には、槽内温度が目標温度より大幅に大きくなるオーバーシュートが発生し、加熱を行っている食品にダメージを与えることがある。しかし、時刻ａの段階で蒸気供給量を減少したことによって槽内温度のオーバーシュートは抑制することができている。   When the steam supply amount is controlled by combining the current temperature in the tank and the expected temperature after a predetermined time as described above, the current temperature in the tank is the target value −0.5 ° C. as shown in FIG. The steam supply amount is reduced at a time point a lower than that. The tank temperature indicated by the solid line in the figure is for the case where the steam supply amount is reduced by slightly opening / closing the micro-open control valve 6B at time a, and the tank temperature indicated by the broken line is the target temperature minus the detected temperature. The figure shows the case where the steam supply amount is decreased after reaching 0.5 ° C. Even if the steam supply amount is decreased, there is a time lag until the temperature inside the tank starts to change. Therefore, the steam supply is performed by opening the fully open / micro open control valve 6B until the temperature inside the tank reaches the target temperature -0.5 ° C. If it continues, an overshoot occurs in which the temperature in the tank becomes significantly higher than the target temperature, which may damage the food being heated. However, the overshoot of the tank temperature can be suppressed by reducing the steam supply amount at the stage of time a.

なお、本発明は以上説明した実施例に限定されるものではなく、多くの変形が本発明の技術的思想内で当分野において通常の知識を有する者により可能である。   The present invention is not limited to the embodiments described above, and many modifications can be made by those having ordinary knowledge in the art within the technical idea of the present invention.

１ 殺菌槽
２ 被殺菌物
３ 蒸気導入管
４ 循環ポンプ
５ 給水導入管
６ 蒸気導入制御装置
６Ａ 全開／全閉制御弁
６Ｂ 全開／微少開制御弁
７ 給水制御弁
８ 循環配管
９ 噴射ノズル
１０ 運転制御装置
１１ 槽内温度検出器













1 sterilization tank
2 Objects to be sterilized
3 Steam inlet pipe
4 Circulation pump
5 Water supply introduction pipe
6 Steam introduction control device 6A Full open / fully closed control valve 6B Full open / micro open control valve
7 Water supply control valve
8 Circulation piping
9 Injection nozzle
10 Operation control device 11 Temperature detector in tank













Claims (2)

殺菌槽内の被殺菌物に高温水を噴射することで被殺菌物を加熱殺菌する加熱殺菌装置であって、殺菌槽内の温度を検出し、殺菌槽内温度が目標値になるように前記高温水に対する蒸気供給量を制御している加熱殺菌装置において、蒸気供給量を制御する蒸気導入制御装置は、全開と全閉の二位置で開閉する全開／全閉制御弁及び全開と微少開の二位置で開閉する全開／微少開制御弁を直列に設置しておき、蒸気導入制御装置は、現時点での槽内温度や演算で求めた所定時間後における槽内温度の予想値に基づき、全開／全閉制御弁及び全開／微少開制御弁の開閉制御を行うものであることを特徴とする加熱殺菌装置。   A heat sterilization apparatus for heating and sterilizing an object to be sterilized by spraying high temperature water onto the object to be sterilized in the sterilization tank, wherein the temperature in the sterilization tank is detected, and the temperature in the sterilization tank is set to a target value. In a heat sterilizer that controls the amount of steam supplied to high-temperature water, the steam introduction control device that controls the amount of steam supplied is a fully open / fully closed control valve that opens and closes in two positions, fully open and fully closed, and fully open and slightly open. A full-open / micro-open control valve that opens and closes in two positions is installed in series, and the steam introduction control device is fully open based on the current temperature in the tank and the expected value of the tank temperature after a predetermined time determined by calculation. / Heat sterilizer for controlling opening / closing of a fully-closed control valve and a fully-open / micro-open control valve. 請求項１に記載の加熱殺菌装置において、蒸気導入制御は、目標温度と目標温度を含む所定の幅を持った目標温度帯を設定しておき、現在の槽内温度が目標温度未満であると全開／全閉制御弁を全開、目標温度よりも高いと全開／全閉制御弁を全閉とし、現在の槽内温度が目標温度帯の下限値未満であり、かつ所定時間後の予測温度も目標温度帯の下限未満であった場合には全開／微少開制御弁を全開とし、それ以外の場合には全開／微少開制御弁を微少開とするものであることを特徴とする加熱殺菌装置。



In the heat sterilization apparatus according to claim 1, the steam introduction control sets a target temperature zone having a predetermined width including the target temperature and the target temperature, and the current temperature in the tank is lower than the target temperature. When the temperature is higher than the target temperature, the fully open / fully closed control valve is fully closed and the fully open / closed control valve is fully closed. The current tank temperature is less than the lower limit of the target temperature zone, and the predicted temperature after a predetermined time is A heat sterilizer characterized in that if it is less than the lower limit of the target temperature range, the fully open / micro open control valve is fully opened, and otherwise, the full open / micro open control valve is slightly open. .



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JP2019205403A (en) * 2018-05-30 2019-12-05 三浦工業株式会社 Sterilizer
JP2019205377A (en) * 2018-05-29 2019-12-05 三浦工業株式会社 Sterilizer

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JPH11206354A (en) * 1998-01-29 1999-08-03 Samson Co Ltd Cooking sterilizer for controlling hot water temperature
JP2007159517A (en) * 2005-12-16 2007-06-28 Samson Co Ltd Heat sterilization apparatus
JP2007309194A (en) * 2006-05-18 2007-11-29 Hitachi Ltd Steam turbine plant
JP2011012567A (en) * 2009-06-30 2011-01-20 Mitsubishi Heavy Ind Ltd Method and device for controlling valve for warming steam turbine

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JPS6153405A (en) * 1984-08-22 1986-03-17 Toshiba Corp Control device of steam turbine
JPH07231770A (en) * 1994-02-23 1995-09-05 Ono Shokuhin Kogyo Kk Air-containing cooking and sterilizing machine
JPH11206354A (en) * 1998-01-29 1999-08-03 Samson Co Ltd Cooking sterilizer for controlling hot water temperature
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JP2011012567A (en) * 2009-06-30 2011-01-20 Mitsubishi Heavy Ind Ltd Method and device for controlling valve for warming steam turbine

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Publication number Priority date Publication date Assignee Title
JP2019205377A (en) * 2018-05-29 2019-12-05 三浦工業株式会社 Sterilizer
JP7049581B2 (en) 2018-05-29 2022-04-07 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
JP7049582B2 (en) 2018-05-30 2022-04-07 三浦工業株式会社 Sterilizer

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