JP2005318979A

JP2005318979A - Cooker

Info

Publication number: JP2005318979A
Application number: JP2004138203A
Authority: JP
Inventors: 雅之 ▲高▼桑; Masayuki Takakuwa
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2004-05-07
Filing date: 2004-05-07
Publication date: 2005-11-17

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooker which automatically controls pressure cooking without requiring a highly precise temperature sensor, a highly precise temperature sensing circuit and a temperature sensor structure which directly contacts with the face of a pressure vessel, and achieves improvement in cooking capability, improvement in flexibility of design, improvement in durability for use and improvement in maintenance. <P>SOLUTION: When the trend of an increase in temperature of a pressure cooker 1, measured with a temperature sensing means 5, is less than a considered threshold, it is judged to have reached a high-pressure boil and an operation for keeping the boil follows, and the threshold of the trend of increasing temperature to be judged as a high-pressure boil is changed according to a difference in temperature detection sensitivity caused by warpage of the bottom of the pressure cooker 1 and foreign substances sticking to the bottom of the pot or the like, quantity of cooked material, surrounding temperature and supply voltage. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、圧力容器内の食材を調理する加熱調理器に関するものである。 The present invention relates to a cooking device that cooks food in a pressure vessel.

従来の加熱調理器には、例えば、圧力容器の底面に接するように配置した温度センサにて圧力容器の底面温度を測定して、圧力容器の底面温度が圧力容器内の沸騰により圧力調整弁からの蒸気漏れが起こるよりも低い温度の圧力調理温度に達すると、所定の温度にて温度制御するものや、加熱量を低減するものがあった（例えば、特許文献１参照）。 In a conventional cooking device, for example, the bottom temperature of the pressure vessel is measured by a temperature sensor arranged so as to be in contact with the bottom surface of the pressure vessel, and the bottom temperature of the pressure vessel rises from the pressure adjustment valve due to boiling in the pressure vessel. When the pressure cooking temperature lower than that at which steam leakage occurs is reached, there are those that control the temperature at a predetermined temperature and those that reduce the amount of heating (for example, see Patent Document 1).

図２は特許文献１に記載された従来の加熱調理器のブロック図を示すものである。図２において、圧力容器５１を器具本体５２に着脱自在に収納し、電気発熱体（加熱手段）５３に載置している。圧力容器５１の蓋部には圧力容器５１内部の圧力を所定の圧力以下に抑制する圧力調整おもり（圧力調整弁）５４を設置している。圧力容器５１の底面温度を検知する温度センサ（温度測定手段）５５を圧力容器５１の底面に接するように配置しており、温度センサ５５で検知した底面温度は制御回路５６に伝えられるように構成している。器具本体５２の側面には操作部５７を配置して制御回路５６に調理時間の設定や調理開始などの操作情報を伝えるようにしている。 FIG. 2 shows a block diagram of a conventional cooking device described in Patent Document 1. In FIG. In FIG. 2, the pressure vessel 51 is detachably housed in the instrument main body 52 and is placed on an electric heating element (heating means) 53. A pressure adjusting weight (pressure adjusting valve) 54 that suppresses the pressure inside the pressure vessel 51 to a predetermined pressure or less is installed on the lid portion of the pressure vessel 51. A temperature sensor (temperature measuring means) 55 for detecting the bottom surface temperature of the pressure vessel 51 is arranged in contact with the bottom surface of the pressure vessel 51, and the bottom surface temperature detected by the temperature sensor 55 is transmitted to the control circuit 56. doing. An operation unit 57 is disposed on the side surface of the appliance main body 52 so that operation information such as setting of cooking time and starting of cooking is transmitted to the control circuit 56.

ここで、圧力容器５１に調理物を入れ、電気発熱体５３に載置して操作部５７にて調理物に応じた調理時間をセットして調理開始を指示すると、制御回路５６は電気発熱体５３の通電を開始する。圧力容器５１の底面温度を温度センサ５５で検知し、圧力調整おもり５４から蒸気が出る温度の少し手前に設定した所定の温度に達すると、制御回路５６は操作部５７で設定した調理時間の減算タイマ（図示せず）を作動させ、同時に電気発熱体５３への通電率を低下するか、または電気発熱体５３の通電を停止して温度の低下を温度センサ５５が検知すると再度電気発熱体５３への通電を行うという動作を繰り返して圧力容器５１の温度制御を行う。調理時間の減算タイマが終了すると制御回路５６は電気発熱体５３への通電を停止し、圧力容器５１内の圧力が低下し、調理が完了する。
特開平１０−２９０７４９号公報 Here, when the food is put into the pressure vessel 51 and placed on the electric heating element 53 and the operation time is set by the operation unit 57 to instruct the start of cooking, the control circuit 56 causes the electric heating element. 53 starts energization. When the temperature of the bottom surface of the pressure vessel 51 is detected by the temperature sensor 55 and reaches a predetermined temperature set slightly before the temperature at which the steam is discharged from the pressure adjusting weight 54, the control circuit 56 subtracts the cooking time set by the operation unit 57. When the timer (not shown) is operated and the current supply rate to the electric heating element 53 is reduced at the same time, or when the temperature sensor 55 detects a decrease in temperature by stopping the electric heating element 53, the electric heating element 53 again. The temperature control of the pressure vessel 51 is performed by repeating the operation of energizing the pressure vessel 51. When the cooking time subtraction timer ends, the control circuit 56 stops energization of the electric heating element 53, the pressure in the pressure vessel 51 decreases, and cooking is completed.
JP-A-10-290749

しかしながら、前記従来の構成では、圧力容器５１内が調理に適した圧力に達したかどうかの判断を温度センサ５５の絶対値で判断する（例えば、おもり５４の動作圧力９．８０６６５×１００００Ｐａ時に圧力容器５１内の水の圧力温度は約１２０℃）必要があるため、温度センサ５５と温度検知回路（制御回路５６）の絶対値精度が高いレベルで必要になり、コストが上昇するという課題があった。また、温度検知の精度を高くするために圧力容器５１に面で接するような温度センサ５５の構成とする必要があり、温度センサ５５部の可動構成や接触面の露出を回避できず、コストの上昇と意匠性の限界、使用耐久性の低下、お手入れ性の悪化が避けられないという課題もあった。 However, in the conventional configuration, whether or not the pressure vessel 51 has reached a pressure suitable for cooking is determined based on the absolute value of the temperature sensor 55 (for example, when the operating pressure of the weight 54 is 9.80665 × 10000 Pa) Since the pressure temperature of the water in the container 51 is required to be approximately 120 ° C.), the absolute value accuracy of the temperature sensor 55 and the temperature detection circuit (control circuit 56) is required at a high level, and there is a problem that the cost increases. It was. Further, in order to increase the accuracy of temperature detection, it is necessary to configure the temperature sensor 55 so as to be in contact with the pressure vessel 51 on the surface, and the movable configuration of the temperature sensor 55 part and the exposure of the contact surface cannot be avoided, and the cost is reduced. There was also a problem that the rise and the limit of the designability, the use durability, and the careability were unavoidably deteriorated.

また、誘導加熱式の加熱手段を使用し、トッププレートを介して鍋底の温度を測定をする場合には、温度測定の感度が低くなるように作用するので、そのままでは調理できないという課題があった。 In addition, when using the induction heating type heating means and measuring the temperature of the pan bottom via the top plate, there is a problem that it cannot be cooked as it is because it acts so that the sensitivity of temperature measurement becomes low. .

本発明は、上記従来の課題を解決するもので、高精度（例えば±１℃）の温度センサや温度検知回路、圧力容器に直接面接触させる温度センサ構成を必要とせずにトッププレートに載置した圧力鍋で調理可能な、調理性能の向上と意匠の自由度向上、使用耐久性の向上、お手入れ性の向上を実現することを目的としている。 The present invention solves the above-described conventional problems, and is placed on the top plate without the need for a high-precision (for example, ± 1 ° C.) temperature sensor, temperature detection circuit, or temperature sensor configuration that directly contacts the pressure vessel. The purpose is to improve cooking performance and design freedom, improve durability of use, and maintainability, which can be cooked with a pressure cooker.

前記従来の課題を解決するために、本発明の加熱調理器は、温度測定手段で測定した圧力鍋の温度上昇の傾向が所定のしきい値以下となると高圧の沸騰に達したと判断して沸騰維持動作に移行するようにしたものである。これによって、高精度の温度センサや複雑な温度検知構成を使用せずして圧力調理の自動制御を行うことができる。 In order to solve the above-mentioned conventional problems, the cooking device of the present invention judges that high-pressure boiling has been reached when the tendency of the temperature rise of the pressure cooker measured by the temperature measuring means is below a predetermined threshold value. It shifts to the boiling maintenance operation. Thereby, automatic control of pressure cooking can be performed without using a highly accurate temperature sensor or a complicated temperature detection structure.

また、本発明の加熱調理器は、圧力鍋の鍋底の反りや鍋底への異物付着などによる温度検知感度の差、調理物の量、周囲温度、電源電圧に応じて高圧の沸騰に達したと判断する温度上昇の傾向のしきい値を変更するようにしたものである。これによって、各環境の差異に関わらず高い圧力調理性能を確保することができる。 In addition, the heating cooker of the present invention has reached a high-pressure boiling depending on the difference in temperature detection sensitivity due to warping of the bottom of the pressure cooker or foreign matter adhering to the pan bottom, the amount of cooked food, the ambient temperature, the power supply voltage The threshold value of the tendency of temperature rise to be judged is changed. Thereby, high pressure cooking performance can be ensured irrespective of the difference of each environment.

本発明の加熱調理器は、一般精度の安価な温度センサ構成、あるいは、トッププレートに載置した圧力鍋に直接圧接しなくてよい非接触式の意匠性の高い温度センサ構成を用いて加圧調理が可能な加熱調理器を実現することができる。 The heating cooker according to the present invention is pressurized by using a temperature sensor configuration with a general accuracy or an inexpensive temperature sensor configuration that does not require direct contact with the pressure cooker placed on the top plate. A cooking device capable of cooking can be realized.

第１の発明は、加圧調理を行う圧力鍋と、前記圧力鍋の中の気圧を所定の気圧以下に抑制する圧力調整弁と、前記圧力鍋を加熱する加熱手段と、前記圧力鍋の温度を測定する温度測定手段と、前記加熱手段を制御する制御部とを備え、前記制御部は前記温度測定手段で測定した前記圧力鍋の温度上昇傾向が所定値以下となると、所定時間高圧での沸騰を継続する沸騰維持制御に切り替わるようにすることにより、高精度の温度センサや温度検知構成を使用せずに圧力調理制御を行うので、安価で圧力調理の自動制御ができ且つ意匠性の高い加熱調理器を実現することができる。 1st invention is the pressure cooker which performs pressure cooking, the pressure control valve which suppresses the atmospheric | air pressure in the said pressure cooker below to a predetermined | prescribed atmospheric pressure, the heating means which heats the said pressure cooker, and the temperature of the said pressure cooker A temperature measuring means for measuring the heating means, and a control section for controlling the heating means, and the control section at a high pressure for a predetermined time when the temperature rising tendency of the pressure cooker measured by the temperature measuring means is less than a predetermined value. By switching to boiling maintenance control that continues boiling, pressure cooking control is performed without using a high-precision temperature sensor or temperature detection configuration, so automatic control of pressure cooking can be performed at low cost and high design A cooking device can be realized.

第２の発明は、特に、第１の発明の加熱調理器に、温度測定手段が圧力鍋の鍋底温度を検知する感度を測定する温度検知感度測定手段を備え、制御部は前記温度検知感度測定手段により測定した前記温度測定手段の温度検知感度に応じて沸騰維持制御に切り替える温度上昇傾向のしきい値を変更するものとすることにより、圧力鍋の鍋底の反りや鍋底への異物の付着などの鍋底の状態に応じて高圧の沸騰に達したと判断する温度上昇の傾向のしきい値を変更するので、鍋底の状態に関わらず圧力調理性能の高い加熱調理器を実現することができる。 2nd invention is equipped with the temperature detection sensitivity measurement means in which the temperature measurement means measures especially the sensitivity which detects the pan bottom temperature of a pressure cooker in the heating cooker of 1st invention, and a control part measures the said temperature detection sensitivity. By changing the threshold value of the temperature rising tendency to switch to boiling maintenance control according to the temperature detection sensitivity of the temperature measuring means measured by means, warping of the bottom of the pressure cooker, adhesion of foreign matter to the pan bottom, etc. Since the threshold value of the temperature rise tendency that is judged to have reached high-pressure boiling is changed according to the state of the pan bottom, a cooking device with high pressure cooking performance can be realized regardless of the state of the pan bottom.

第３の発明は、特に、第１の発明の加熱調理器の制御部に、圧力鍋の中の調理物の量を測定する内容量測定手段を備え、制御部は前記内容量測定手段により測定した前記圧力鍋の中の調理物の量に応じて沸騰維持制御に切り替える温度上昇傾向のしきい値を変更するものとすることにより、調理物の量に応じて高圧の沸騰に達したと判断する温度上昇の傾向のしきい値を変更するので、調理物の量に関わらず圧力調理性能の高い加熱調理器を実現することができる。 In a third aspect of the invention, in particular, the control unit of the heating cooker of the first aspect is provided with an internal volume measuring means for measuring the amount of the cooked food in the pressure cooker, and the control part is measured by the internal volume measuring means. It is determined that high-pressure boiling has been reached according to the amount of food by changing the threshold value of the temperature rising tendency to switch to boiling maintenance control according to the amount of food in the pressure cooker. Since the threshold value of the tendency of temperature rise to be changed is changed, a cooking device having high pressure cooking performance can be realized regardless of the amount of the cooked food.

第４の発明は、特に、第１の発明の加熱調理器の制御部に、周囲温度を測定する周囲温度測定手段を備え、制御部は前記周囲温度測定手段により測定した周囲温度に応じて沸騰維持制御に切り替える温度上昇傾向のしきい値を変更するものとすることにより、室温に応じて高圧の沸騰に達したと判断する温度上昇の傾向のしきい値を変更するので、室温に関わらず圧力調理性能の高い加熱調理器を実現することができる。 In the fourth aspect of the invention, in particular, the control unit of the heating cooker of the first aspect is provided with an ambient temperature measuring unit for measuring the ambient temperature, and the control unit boils according to the ambient temperature measured by the ambient temperature measuring unit. By changing the threshold value of temperature rise tendency to switch to maintenance control, the threshold value of temperature rise tendency to judge that high pressure boiling has been reached is changed according to room temperature. A cooking device having high pressure cooking performance can be realized.

第５の発明は、特に、第１の発明の加熱調理器の制御部に、電源電圧を測定する電源電圧測定手段を備え、制御部は前記電源電圧測定手段により測定した電源電圧に応じて沸騰維持制御に切り替える温度上昇傾向のしきい値を変更するものとすることにより、電源電圧に応じて高圧の沸騰に達したと判断する温度上昇の傾向のしきい値を変更するので、電源電圧に関わらず圧力調理性能の高い加熱調理器を実現することができる。 In the fifth aspect of the invention, in particular, the control unit of the heating cooker of the first aspect is provided with power supply voltage measuring means for measuring the power supply voltage, and the control part boils according to the power supply voltage measured by the power supply voltage measuring means. By changing the threshold value of the temperature increase tendency to switch to maintenance control, the threshold value of the temperature increase tendency to determine that high-pressure boiling has been reached is changed according to the power supply voltage. Regardless, a cooking device having high pressure cooking performance can be realized.

第６の発明は、特に、第１〜５のいずれか１つの発明の加熱調理器の制御部は、温度測定手段で測定した圧力鍋の温度上昇傾向により沸騰維持制御に切り替えると温度上昇傾向を測定するのに要した時間を沸騰維持制御を継続する所定時間から差し引くものとすることにより、高圧の沸騰検知に要した時間分だけ調理タイマの残り時間から差し引くので、高圧の沸騰検知に要した時間分だけ調理タイマ減算開始が遅れるために実質加圧調理時間が延びてしまうことを防ぐことができ、圧力調理性能の高い加熱調理器を実現することができる。 In the sixth aspect of the invention, in particular, when the controller of the cooking device of any one of the first to fifth aspects switches to boiling maintenance control due to the temperature rise tendency of the pressure cooker measured by the temperature measuring means, the temperature rise tendency is increased. By subtracting the time required for measurement from the predetermined time during which the boiling maintenance control is continued, the time required for detecting high-pressure boiling is subtracted from the remaining time of the cooking timer, which required high-pressure boiling detection. Since the start of subtraction of the cooking timer is delayed by the amount of time, it is possible to prevent the substantial pressurized cooking time from extending, and a cooking device with high pressure cooking performance can be realized.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、本実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiment.

（実施の形態１）
図１は、本発明の実施の形態１における加熱調理器のブロック図を示すものである。 (Embodiment 1)
FIG. 1 shows a block diagram of a cooking device according to Embodiment 1 of the present invention.

図１において、加圧調理をする圧力鍋１をトッププレート２に載置し、加熱手段３により圧力鍋１をトッププレート２越しに誘導加熱する。圧力鍋１内の圧力が所定の圧力に達すると圧力鍋１の蓋部に設置した圧力調整弁４から圧力鍋１内の蒸気を放出して圧力鍋１内の圧力を予め調整した所定の圧力以下に抑制する。温度検知手段（温度測定手段）５は圧力鍋１の底面の温度をトッププレート２越しに温度検知し、制御部６は温度検知手段５で検知した温度に応じて加熱手段３を制御する。使用者は操作部７を操作して圧力調理時間の設定と調理の開始を制御部６に伝える。圧力調理タイマ８は減算タイマでありタイマの減算が終了すると制御部６にタイマの計時完了を伝える。一方、温度検知感度測定手段１１は温度検知手段５が圧力鍋１の鍋底温度を検知する感度を測定し制御部６に伝え、内容量測定手段１２は圧力鍋１の内容物の量を測定し制御部６に伝え、周囲温度測定手段９は加熱調理器の周囲温度を測定し制御部６に伝え、電源電圧測定手段１０は供給電源である商用電源の電圧を測定し制御部６に伝える。 In FIG. 1, a pressure cooker 1 for pressure cooking is placed on a top plate 2, and the pressure cooker 1 is induction-heated through the top plate 2 by a heating means 3. When the pressure in the pressure cooker 1 reaches a predetermined pressure, the steam in the pressure cooker 1 is discharged from the pressure regulating valve 4 installed on the lid of the pressure cooker 1 to adjust the pressure in the pressure cooker 1 in advance. It suppresses to the following. The temperature detection means (temperature measurement means) 5 detects the temperature of the bottom surface of the pressure cooker 1 through the top plate 2, and the control unit 6 controls the heating means 3 according to the temperature detected by the temperature detection means 5. The user operates the operation unit 7 to inform the control unit 6 of the setting of the pressure cooking time and the start of cooking. The pressure cooking timer 8 is a subtraction timer, and when the subtraction of the timer is completed, the control unit 6 is notified of the completion of the timer timing. On the other hand, the temperature detection sensitivity measurement means 11 measures the sensitivity with which the temperature detection means 5 detects the bottom temperature of the pressure cooker 1 and transmits it to the control unit 6, and the internal volume measurement means 12 measures the amount of contents in the pressure cooker 1. The information is transmitted to the control unit 6, the ambient temperature measuring unit 9 measures the ambient temperature of the cooking device and transmits the measured temperature to the control unit 6, and the power supply voltage measuring unit 10 measures the voltage of the commercial power supply as the supply power and transmits the measured voltage to the control unit 6.

以上のように構成された加熱調理器について、以下その動作、作用を説明する。 About the cooking-by-heating machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

まず、圧力鍋１に調理物を入れ、圧力調整おもりなどで構成される圧力調整弁４をセットする。圧力鍋１をトッププレート２の所定の位置に載置し、操作部７により加圧調理時間を設定して、調理開始の指示をすると、制御部６は加熱手段３を通電して圧力鍋１を加熱する。圧力鍋１の温度が上昇して１気圧の沸騰が始まると発生する蒸気により圧力鍋１内の気圧が上昇し、圧力鍋１の鍋底温度も上昇を続ける。さらに加熱手段３による加熱を続け、圧力鍋１内の気圧が圧力調整弁４により設定している所定の圧力に達すると圧力調整弁４が作動して圧力鍋１内の蒸気が放出され、圧力鍋１内の気圧は、圧力調整弁４により設定している所定の圧力に維持されるため、圧力鍋１内の調理物の温度も圧力調整弁４が作動してからは、沸騰は継続するが所定の圧力に応じた温度に維持されるので上昇せず、従って圧力鍋１の鍋底温度も上昇速度が低下する。温度検知手段５は操作部７による調理開始の指示があってからは常にトッププレート２越しに圧力鍋１の鍋底温度を検知し続けており、制御手段７は、温度上昇の傾向を知るために、例えば温度が１度上昇するのに掛かる時間を計時し続けているが、圧力調整弁４が作動してからは温度の上昇速度が急激に遅くなるため温度検知手段５で検知している温度が１度上昇するのに掛かる時間が長くなる。 First, the cooked food is put into the pressure cooker 1, and the pressure regulating valve 4 constituted by a pressure regulating weight or the like is set. When the pressure cooker 1 is placed at a predetermined position on the top plate 2, a pressure cooking time is set by the operation unit 7, and an instruction to start cooking is given, the control unit 6 energizes the heating means 3 to turn on the pressure cooker 1. Heat. When the temperature of the pressure cooker 1 rises and boiling of 1 atm begins, the pressure in the pressure cooker 1 rises due to the generated steam, and the temperature at the bottom of the pressure cooker 1 continues to rise. Further, heating by the heating means 3 is continued, and when the atmospheric pressure in the pressure cooker 1 reaches a predetermined pressure set by the pressure regulating valve 4, the pressure regulating valve 4 is actuated to release steam in the pressure cooker 1, Since the atmospheric pressure in the pan 1 is maintained at a predetermined pressure set by the pressure adjustment valve 4, boiling continues even after the temperature of the cooked food in the pressure cooker 1 is activated. Is maintained at a temperature corresponding to a predetermined pressure, so that the temperature does not increase. Therefore, the temperature at the bottom of the pressure cooker 1 also decreases. The temperature detecting means 5 always detects the temperature at the bottom of the pressure cooker 1 through the top plate 2 after the instruction to start cooking by the operation unit 7, and the control means 7 knows the tendency of temperature rise. For example, although the time taken for the temperature to rise once is kept, the temperature detected by the temperature detecting means 5 since the rate of temperature rise is abruptly reduced after the pressure regulating valve 4 is operated. Takes a long time to rise.

ここで、圧力調整弁４が閉じている間の温度検知手段５で検知している温度が１度上昇するのに掛かる時間が例えば、３０秒と設定した所定時間に満たないときは加熱手段３による加熱を続け、３０秒以上掛かったときには圧力調整弁４が作動して高圧の沸騰状態になっていると判断して沸騰維持工程に移行する。 Here, if the time taken for the temperature detected by the temperature detecting means 5 to rise once while the pressure regulating valve 4 is closed is less than a predetermined time set to 30 seconds, for example, the heating means 3 When it takes 30 seconds or more, the pressure regulating valve 4 is actuated and it is determined that the high pressure boiling state is reached, and the process proceeds to the boiling maintaining step.

しかしながら、トッププレート２を介して鍋底の温度を計測しているので検知感度は低くなるように作用し、温度検知手段５の検知感度はトッププレート２の厚みが均一であれば、温度検知手段５の真上にあたる圧力鍋１の鍋底とトッププレート２との距離（鍋の設置状態）により変化する。そこで、温度検知手段５の検知感度を調べるために、温度検知感度測定手段１１は、例えば、調理開始直後に１０００Ｗの一定火力で３０秒間加熱し、その間の温度上昇を計測する。短時間の一定火力により圧力鍋１の内容物の温度上昇が起こる前に鍋底のみが先に加熱されるので、鍋底温度を受けて温度検知手段５が温度上昇する速度を測定することで内容量に拠らず鍋底温度の検知感度が判定でき、このときの温度上昇が多ければ検知感度は高く、温度上昇が少なければ検知感度は低いと推定できる。圧力鍋１内が高圧の沸騰に達したと判断するための、温度が１度上昇するのに掛かる時間のしきい値は、検知遅れをなるべく避けるために短めに設定したいが、温度検知手段５の検知感度が高いときに比べて検知感度が低いときには圧力調整弁４の作動前の検知温度上昇速度が遅くなるため、高圧の沸騰に達する前に達したと誤検知するのを避けるために、温度が１度上昇するのに掛かる時間について圧力調整弁４が作動して高圧の沸騰に達したと判断するしきい値を長くする。 However, since the temperature at the bottom of the pan is measured via the top plate 2, the detection sensitivity acts so that the detection sensitivity of the temperature detection means 5 is uniform if the thickness of the top plate 2 is uniform. It changes according to the distance (installation state of the pan) between the bottom of the pressure cooker 1 and the top plate 2 which is directly above. Therefore, in order to examine the detection sensitivity of the temperature detection means 5, the temperature detection sensitivity measurement means 11 is heated, for example, at a constant heating power of 1000 W for 30 seconds immediately after cooking, and measures the temperature rise during that time. Only the bottom of the pan is heated before the temperature of the contents of the pressure cooker 1 rises due to the constant heating power for a short time, so the internal volume can be measured by measuring the rate at which the temperature detecting means 5 rises in response to the pan bottom temperature. It can be estimated that the detection sensitivity of the pan bottom temperature can be determined regardless of the temperature, and that the detection sensitivity is high if the temperature rise at this time is large, and the detection sensitivity is low if the temperature rise is small. The threshold for the time taken for the temperature to rise once to determine that the inside of the pressure cooker 1 has reached high pressure boiling is set to be short in order to avoid detection delay as much as possible. When the detection sensitivity is low compared to when the detection sensitivity is high, the detection temperature rise rate before the operation of the pressure regulating valve 4 is slowed. Therefore, in order to avoid erroneous detection that the pressure reached before reaching the high pressure boiling, For the time required for the temperature to rise once, the threshold value for determining that the high pressure boiling has been reached by operating the pressure regulating valve 4 is lengthened.

（表１）は本実施の形態１における温度検知感度による圧力調理時間補正の表である。 (Table 1) is a table of pressure cooking time correction based on temperature detection sensitivity in the first embodiment.

なお、トッププレートを使用しない（介しない）で温度を計測する場合は、感度検知レベルが高くなるように作用し、同様のやりかたで補正値を新たに設定して調理をすることもできる。このとき、一般精度（例えば±３〜５℃程度）の感度検知レベルの低い温度センサ構成を使用しても良い。 Note that when the temperature is measured without using (not through) the top plate, the sensitivity detection level is increased and cooking can be performed with a new correction value set in the same manner. At this time, a temperature sensor configuration with a general accuracy (for example, about ± 3 to 5 ° C.) and a low sensitivity detection level may be used.

また、同じ火力で圧力鍋１を加熱したとしても圧力鍋１内の調理物の量によって温度上昇速度が変化する。そこで、調理物の量を調べるために内容量測定手段１２は、例えば温度検知手段５の検知温度が８０℃から８５℃に至るまでの時間を計時して、時間が長ければ内容量が多く、時間が短ければ内容量が少ないと推定できる。圧力鍋１内の調理物の量が少ないときに比べて量が多いときには同じ火力で加熱しても圧力鍋１の温度上昇速度が遅れ圧力調整弁４の作動前の検知温度上昇速度が遅くなるため、高圧の沸騰に達する前に達したと誤検知するのを避けるために、温度が１度上昇するのに掛かる時間について圧力調整弁４が作動して高圧の沸騰に達したと判断するしきい値を長くする。 Moreover, even if the pressure cooker 1 is heated with the same heating power, the temperature rise rate changes depending on the amount of the cooked food in the pressure cooker 1. Therefore, in order to check the amount of food, the content measuring means 12 measures, for example, the time until the temperature detected by the temperature detecting means 5 reaches 80 ° C. to 85 ° C., and if the time is long, the content is large. If the time is short, it can be estimated that the content is small. When the amount of cooked food in the pressure cooker 1 is large, the temperature rise rate of the pressure cooker 1 is delayed even when heated with the same heating power, and the detected temperature rise rate before the operation of the pressure regulating valve 4 is delayed. Therefore, in order to avoid erroneously detecting that the pressure has reached before reaching the high pressure boiling, it is determined that the pressure adjustment valve 4 has been operated and the high pressure boiling has been reached for the time taken for the temperature to rise once. Increase the threshold.

（表２）は本実施の形態１における内容量による圧力調理時間補正の表である。 (Table 2) is a table of pressure cooking time correction according to the internal volume in the first embodiment.

また、同じ火力で圧力鍋１を加熱したとしても周囲温度によって温度上昇速度が変化する。そこで、周囲温度測定手段９により周囲温度を測定する。周囲温度が高いときに比べて周囲温度が低いときにも圧力鍋１からの放熱量が多くなり圧力鍋１の温度上昇が遅れるので圧力調整弁４の作動前の検知温度上昇速度が遅くなるため、高圧の沸騰に達する前に達したと誤検知するのを避けるために、温度が１度上昇するのに掛かる時間について圧力調整弁４が作動して高圧の沸騰に達したと判断するしきい値を長くする。 Moreover, even if the pressure cooker 1 is heated with the same heating power, the rate of temperature rise varies depending on the ambient temperature. Therefore, the ambient temperature is measured by the ambient temperature measuring means 9. Since the amount of heat released from the pressure cooker 1 increases and the temperature rise of the pressure cooker 1 is delayed even when the ambient temperature is low as compared to when the ambient temperature is high, the detected temperature rise rate before the operation of the pressure regulating valve 4 is delayed. In order to avoid erroneous detection that the pressure has reached before reaching the high-pressure boiling, the threshold for determining that the pressure-regulating valve 4 has actuated and reached the high-pressure boiling for the time taken for the temperature to rise once. Increase the value.

（表３）は本実施の形態１における周囲温度による圧力調理時間補正の表である。 (Table 3) is a table of pressure cooking time correction according to ambient temperature in the first embodiment.

また、電源電圧によって加熱手段３の火力が変化するため、電源電圧測定手段１０により電源電圧を測定する。電源電圧が高いときに比べて電源電圧が低いときにも結果として加熱手段３の火力が低下して圧力調整弁４の作動前の検知温度上昇速度が遅くなるため、高圧の沸騰に達する前に達したと誤検知するのを避けるために、温度が１度上昇するのに掛かる時間について圧力調整弁４が作動して高圧の沸騰に達したと判断するしきい値を長くする。 Further, since the heating power of the heating means 3 varies depending on the power supply voltage, the power supply voltage measuring means 10 measures the power supply voltage. Even when the power supply voltage is lower than when the power supply voltage is high, as a result, the heating power of the heating means 3 decreases and the detected temperature rise rate before the operation of the pressure regulating valve 4 becomes slow. In order to avoid erroneous detection that the temperature has reached, the threshold value for determining that the high pressure boiling has been reached by operating the pressure regulating valve 4 is increased for the time taken for the temperature to rise once.

（表４）は本実施の形態１における電源電圧による圧力調理時間補正の表である。 (Table 4) is a table of pressure cooking time correction by the power supply voltage in the first embodiment.

上記で示した、温度検知感度、内容量、周囲温度、電源電圧の変化に対して具体的には（表１）（表２）（表３）（表４）に示すように、温度が１度上昇するのに掛かる時間について高圧の沸騰に達したと判断するしきい値を補正し、補正後のしきい値にて前出の判断を行い、圧力調整弁４が作動していると判断すると沸騰維持工程に移行する。例えば、温度検知感度測定手段１１にて測定した温度検知感度が４度のやや高感度で、内容量測定手段１２にて測定した内容量が判定時間４０秒のやや少量で、周囲温度測定手段９にて測定した周囲温度が２５℃の中温で、電源電圧測定手段１０にて測定した電源電圧が１０３Ｖであったときには、初期のしきい値が３０秒であるとすると温度検知感度により＋５秒、内容量により＋５秒、周囲温度により±０秒、電源電圧によりー５秒の補正を掛けるため、しきい値は３０＋５＋５−５＝３５秒となり、温度が１度上昇するのに掛かる時間が３５秒以上であるときには沸騰維持工程に移行する。 Specifically, the temperature detection sensitivity, the internal capacity, the ambient temperature, and the change in the power supply voltage described above are specifically shown in (Table 1) (Table 2) (Table 3) (Table 4). The threshold value for determining that the high pressure boiling has been reached is corrected for the time taken to increase the temperature, the above determination is made based on the corrected threshold value, and the pressure adjustment valve 4 is determined to be operating. Then, it shifts to a boiling maintenance process. For example, the temperature detection sensitivity measured by the temperature detection sensitivity measuring means 11 is slightly high sensitivity of 4 degrees, the internal volume measured by the internal volume measurement means 12 is a little small with a determination time of 40 seconds, and the ambient temperature measurement means 9 When the ambient temperature measured at 25 is a medium temperature of 25 ° C. and the power supply voltage measured by the power supply voltage measuring means 10 is 103 V, if the initial threshold is 30 seconds, the temperature detection sensitivity is +5 seconds, The correction is +5 seconds depending on the internal capacity, ± 0 seconds depending on the ambient temperature, and -5 seconds depending on the power supply voltage. Therefore, the threshold value is 30 + 5 + 5-5 = 35 seconds, and the time required for the temperature to rise once is 35. When it is more than 2 seconds, the process proceeds to the boiling maintenance process.

沸騰維持工程では圧力調整弁４を作動し続けるだけの火力を圧力鍋１に与え続ければ高圧の沸騰を維持できるので、制御部６は、圧力調整弁４の作動状態を継続できる火力として実験的に得られた加熱手段３の電力量を３００Ｗにする。同時に操作部７により調理開始前に使用者が設定した圧力調理時間を圧力調理タイマ８に引渡し減算タイマを作動させる。圧力調理タイマ８の減算が完了すると制御部６は圧力調理の終了を報知すると同時に加熱手段３への通電を停止する。 In the boiling maintenance step, if the heating power sufficient to keep operating the pressure regulating valve 4 is continuously applied to the pressure cooker 1, the high pressure boiling can be maintained. Therefore, the control unit 6 is experimentally used as the thermal power capable of continuing the operating state of the pressure regulating valve 4. The electric power of the heating means 3 obtained in step 3 is set to 300W. At the same time, the pressure cooking time set by the user before cooking is started by the operation unit 7 is transferred to the pressure cooking timer 8 to activate the subtraction timer. When the subtraction of the pressure cooking timer 8 is completed, the control unit 6 notifies the end of the pressure cooking and at the same time stops energizing the heating means 3.

ここで、圧力調整弁４が作動して温度検知手段５の温度上昇傾向が低下するのを確認して圧力鍋１内が高圧の沸騰状態であると判定するためには補正量を含めて最大約２分ほどの検知時間が掛かっているが、実際に高圧の沸騰状態となり圧力調整弁４が作動しはじめているのは沸騰維持工程に移行したときの検知時間の開始前である。つまり、高圧の沸騰を検知するための検知時間だけ高圧の沸騰状態がすでに経過しており、そこから調理開始前に使用者が設定した圧力調理時間分だけ高圧の沸騰を継続すると、実質的には高圧の沸騰を検知するための検知時間だけ長く加圧調理してしまい、圧力調理性能が悪化する。この問題を避けるために高圧の沸騰を検知するのに掛かった検知時間、すなわち温度検知感度、内容量、周囲温度、電源電圧の違いによる（表１）（表２）（表３）（表４）の補正値を加味したしきい値を調理開始前に使用者が設定した圧力調理時間から差し引く。 Here, in order to confirm that the pressure regulating valve 4 is actuated and the temperature rising tendency of the temperature detecting means 5 is reduced and to determine that the pressure cooker 1 is in a high-pressure boiling state, the maximum amount including the correction amount is included. Although it takes about 2 minutes of detection time, the pressure regulating valve 4 actually starts to operate in a high-pressure boiling state before the start of the detection time when the boiling maintenance process is started. In other words, if the high-pressure boiling state has already passed for the detection time for detecting high-pressure boiling, and if the high-pressure boiling continues for the pressure cooking time set by the user before cooking, Will cook for a longer time than the detection time for detecting high pressure boiling, and pressure cooking performance will deteriorate. In order to avoid this problem, the detection time required to detect high-pressure boiling, that is, the difference in temperature detection sensitivity, internal capacity, ambient temperature, and power supply voltage (Table 1) (Table 2) (Table 3) (Table 4) ) Is subtracted from the pressure cooking time set by the user before starting cooking.

以上のように、本実施の形態においては、制御部６は、温度検知手段５で測定した圧力鍋１の温度上昇の傾向が所定のしきい値以下となると高圧の沸騰に達したと判断して沸騰維持動作に移行するようにしたことにより高精度の温度センサや温度検知構成を使用せずして圧力調理の自動制御を行うことができ、本実施の形態のようにトッププレート２を介して温度検知手段５が圧力鍋１に直接触れていない構成であっても温度検知手段５の絶対温度精度があまり高く求められないため圧力調理の自動制御が可能であり、従って意匠の自由度が高く、お手入れ性のよい加熱調理器を実現することができる。 As described above, in the present embodiment, the control unit 6 determines that high-pressure boiling has been reached when the temperature rise tendency of the pressure cooker 1 measured by the temperature detection means 5 is less than or equal to a predetermined threshold value. Therefore, automatic control of pressure cooking can be performed without using a high-accuracy temperature sensor and temperature detection configuration, and the top plate 2 can be used as in the present embodiment. Even if the temperature detection means 5 is not in direct contact with the pressure cooker 1, the absolute temperature accuracy of the temperature detection means 5 is not required to be so high that automatic control of pressure cooking is possible. A cooking device that is high and easy to clean can be realized.

また、圧力鍋１の鍋底の反りや鍋底への異物付着、調理物の量、周囲温度、電源電圧に応じて高圧の沸騰に達したと判断する温度上昇の傾向のしきい値を変更することにより、各環境の差異に関わらず高い圧力調理性能を確保することができる。 Moreover, the threshold value of the tendency of the temperature rise which judges that it reached high pressure boiling according to the curvature of the bottom of the pressure cooker 1 or the foreign substance adhesion to the pan bottom, the amount of the cooked food, the ambient temperature, and the power supply voltage is changed. Thus, high pressure cooking performance can be ensured regardless of the difference in each environment.

なお、本実施の形態において、制御部６は、温度上昇の傾向を知るために温度が１度上昇するのに掛かる時間を計時したが、計時する温度上昇の単位は０．５度など他の値でも良く、または温度ではなく温度に換算できるサーミスタの抵抗値や回路上の電圧値などを利用したものでも良い。また、温度上昇の傾向を知る手段としては一定時間中に上昇する温度を測定するものとしても良い。 In the present embodiment, the control unit 6 measures the time taken for the temperature to rise once in order to know the tendency of the temperature rise. However, the unit of the temperature rise to be measured is 0.5 degree or the like. A value may be used, or a resistance value of a thermistor that can be converted into a temperature instead of a temperature, a voltage value on a circuit, or the like may be used. Further, as a means for knowing the tendency of temperature rise, the temperature rising during a certain time may be measured.

本発明の加熱調理器は、各環境の差異に関わらず高い圧力調理性能を確保することができるので、専用の圧力調理器として以外に、汎用の鍋を使用できかつ圧力鍋も使用できる汎用の加熱調理器等の用途としても適用できる。 Since the heating cooker of the present invention can ensure high pressure cooking performance regardless of the difference in each environment, a general-purpose pan can be used and a pressure cooker can be used in addition to a dedicated pressure cooker. It can also be used as a cooking device.

本発明の実施の形態１における加熱調理器のブロック図The block diagram of the heating cooker in Embodiment 1 of this invention 従来の加熱調理器のブロック図Block diagram of a conventional cooking device

符号の説明Explanation of symbols

１圧力鍋
２トッププレート
３加熱手段
４圧力調整弁
５温度検知手段（温度測定手段）
６制御部
９周囲温度測定手段
１０電源電圧測定手段
１１温度検知感度測定手段
１２内容量測定手段 DESCRIPTION OF SYMBOLS 1 Pressure cooker 2 Top plate 3 Heating means 4 Pressure regulating valve 5 Temperature detection means (temperature measurement means)
6 Control Unit 9 Ambient Temperature Measuring Means 10 Power Supply Voltage Measuring Means 11 Temperature Detection Sensitivity Measuring Means 12 Content Capacity Measuring Means

Claims

加圧調理を行う圧力鍋と、前記圧力鍋の中の気圧を所定の気圧以下に抑制する圧力調整弁と、前記圧力鍋を加熱する加熱手段と、前記圧力鍋の温度を測定する温度測定手段と、前記加熱手段を制御する制御部とを備え、前記制御部は前記温度測定手段で測定した前記圧力鍋の温度上昇傾向が所定値以下となると、所定時間高圧での沸騰を継続する沸騰維持制御に切り替わるようにした加熱調理器。 A pressure cooker that performs pressure cooking, a pressure adjustment valve that suppresses the pressure in the pressure cooker to a predetermined pressure, a heating device that heats the pressure cooker, and a temperature measurement device that measures the temperature of the pressure cooker. And a controller for controlling the heating means, wherein the controller keeps boiling at a high pressure for a predetermined time when the temperature rise tendency of the pressure cooker measured by the temperature measuring means is below a predetermined value. A cooking device that switches to control.

温度測定手段が圧力鍋の鍋底温度を検知する感度を測定する温度検知感度測定手段を備え、制御部は、前記温度検知感度測定手段により測定した前記温度測定手段の温度検知感度に応じて沸騰維持制御に切り替える温度上昇傾向のしきい値を変更するようにした請求項１に記載の加熱調理器。 The temperature measurement means includes a temperature detection sensitivity measurement means for measuring the sensitivity of detecting the temperature at the bottom of the pressure cooker, and the controller maintains boiling according to the temperature detection sensitivity of the temperature measurement means measured by the temperature detection sensitivity measurement means. The cooking device according to claim 1, wherein a threshold value of a temperature rising tendency to be switched to control is changed.

圧力鍋の中の調理物の量を測定する内容量測定手段を備え、制御部は、前記内容量測定手段により測定した前記圧力鍋の中の調理物の量に応じて沸騰維持制御に切り替える温度上昇傾向のしきい値を変更するようにした請求項１に記載の加熱調理器。 A temperature measuring means for measuring the amount of cooked food in the pressure cooker is provided, and the control unit switches to boiling maintenance control according to the amount of cooked food in the pressure cooker measured by the content measuring means. The cooking device according to claim 1, wherein a threshold value of the upward tendency is changed.

周囲温度を測定する周囲温度測定手段を備え、制御部は、前記周囲温度測定手段により測定した周囲温度に応じて沸騰維持制御に切り替える温度上昇傾向のしきい値を変更するようにした請求項１に記載の加熱調理器。 An ambient temperature measuring means for measuring an ambient temperature is provided, and the control unit changes a threshold value of a temperature rising tendency to be switched to the boiling maintenance control according to the ambient temperature measured by the ambient temperature measuring means. The heating cooker described in 1.

電源電圧を測定する電源電圧測定手段を備え、制御部は、前記電源電圧測定手段により測定した電源電圧に応じて沸騰維持制御に切り替える温度上昇傾向のしきい値を変更するようにした請求項１に記載の加熱調理器。 The power supply voltage measuring means for measuring the power supply voltage is provided, and the controller changes the threshold value of the temperature rising tendency to switch to the boiling maintenance control according to the power supply voltage measured by the power supply voltage measuring means. The heating cooker described in 1.

制御部は、温度測定手段で測定した圧力鍋の温度上昇傾向により沸騰維持制御に切り替えると温度上昇傾向を測定するのに要した時間を沸騰維持制御を継続する所定時間から差し引くようにした請求項１〜５のいずれか１項に記載の加熱調理器。 The controller is configured to subtract the time required to measure the temperature rising tendency from the predetermined time for continuing the boiling maintenance control when switching to the boiling maintenance control due to the temperature rising tendency of the pressure cooker measured by the temperature measuring means. The cooking device according to any one of 1 to 5.