JP6281120B2

JP6281120B2 - Heating device

Info

Publication number: JP6281120B2
Application number: JP2014118282A
Authority: JP
Inventors: 輝雄林中; 武平　高志; 高志武平; 富永　博; 博富永
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2014-06-09
Filing date: 2014-06-09
Publication date: 2018-02-21
Anticipated expiration: 2034-06-09
Also published as: JP2015230889A

Description

本発明は、火傷を防止すべく、加熱部あるいは加熱部近傍が高温の場合に高温表示を行う高温表示部を有する加熱装置に関するものである。 The present invention relates to a heating apparatus having a high-temperature display unit that displays a high temperature when the heating unit or the vicinity of the heating unit is at a high temperature in order to prevent burns.

従来、この種の加熱装置は、加熱手段と、前記加熱手段の出力を制御する加熱制御手段と、前記加熱手段あるいは前記加熱手段近傍の温度を検知する温度検知手段と、前記加熱手段あるいは前記加熱手段近傍の温度が高温であることを表示する高温表示手段を備え、前記加熱手段の通電停止後の所定の待機時間は高温表示動作を行うとともに、前記待機時間が経過した以降は前記温度検知手段の検知結果に基づき高温表示動作を停止し、前記待機時間は前記加熱手段への通電情報に基づいて設定あるいは変更を行うようにした加熱調理器が開示されている（例えば、特許文献１参照）。 Conventionally, this type of heating apparatus includes a heating means, a heating control means for controlling the output of the heating means, a temperature detecting means for detecting the temperature of the heating means or the vicinity of the heating means, the heating means or the heating means. High temperature display means for displaying that the temperature in the vicinity of the means is high, and performs a high temperature display operation for a predetermined standby time after the energization of the heating means is stopped, and after the standby time has elapsed, the temperature detection means A heating cooker is disclosed in which the high-temperature display operation is stopped based on the detection result and the standby time is set or changed based on energization information to the heating means (see, for example, Patent Document 1). .

特開２００１−２２１４４３号公報JP 2001-221443 A

しかしながら、前記従来の構成では、加熱手段近傍に高温表示を行うために温度検知手段を設けると、構成が複雑になるとともにコストが高くなるという課題があった。また、簡単な構成で実現できる温度検知手段として例えばサーモスタットなどの機械的接点を有するデバイスを使用した場合、万一、接点部に異物が混入すると接点部が接点不良となり、前記高温表示動作の動作不良または動作精度が下がる可能性があるという課題があった。 However, in the conventional configuration, when the temperature detection unit is provided in the vicinity of the heating unit to display a high temperature, there is a problem that the configuration becomes complicated and the cost increases. In addition, when a device having a mechanical contact such as a thermostat is used as a temperature detecting means that can be realized with a simple configuration, if a foreign object enters the contact, the contact becomes defective, and the high temperature display operation is performed. There has been a problem that there is a possibility that the defect or the operation accuracy may be lowered.

前記従来の課題を解決するために、本発明の加熱装置は、被加熱体を加熱する加熱部と、前記加熱部あるいは前記加熱部近傍の温度が高温であることを知らせる高温表示を行う高温表示部と、前記加熱部の加熱出力および前記高温表示部を制御する制御部と、前記制御部が前記加熱部を制御して加熱を行う加熱モード中は充電動作を行い、前記加熱部にて加熱を行わない待機モード中は放電動作を行う充放電回路部と、停電状態ではない場合に前記加熱部が加熱を行っていない期間または前記待機モードを継続している期間である第１の経過時間を計時する計時部と、を備え、前記制御部は、前記充放電回路部の出力電圧が第１の所定電圧以上である期間において、少なくとも前記待機モード中は前記第１の経過時間が第１の所定時間未満であれば前記高温表示部により高温表示を行うとともに前記第１の経過時間が前記第１の所定時間以上になると前記高温表示部の高温表示を行わないようにし、前記充放電回路部の出力電圧が第１の所定電圧未満になると、前記第１の経過時間にかかわらず、前記高温表示部による高温表示を行わないようにするとともに、前記制御部は、前記加熱部が前記加熱モードを開始してからの加熱積算電力が第１の所定電力以上の場合、前記加熱モード中に停電状態となった後、通電状態に復帰したときは、前記充放電回路部の出力電圧が前記第１の所定電圧以上であれば前記高温表示部による高温表示を行うようにしたものである。
In order to solve the above-described conventional problems, the heating device according to the present invention includes a heating unit that heats an object to be heated, and a high-temperature display that displays a high-temperature display notifying that the temperature of the heating unit or the vicinity of the heating unit is high. And a control unit that controls the heating output of the heating unit and the high-temperature display unit, and a charging operation is performed during the heating mode in which the control unit controls the heating unit to perform heating, and heating is performed by the heating unit. A charge / discharge circuit unit that performs a discharging operation during the standby mode in which no heating is performed, and a first elapsed time that is a period during which the heating unit is not heating or the standby mode is continued when not in a power failure state A timing unit that counts the first elapsed time during the period in which the output voltage of the charge / discharge circuit unit is equal to or higher than a first predetermined voltage, at least during the standby mode. In less than a predetermined time The high temperature display unit performs high temperature display, and when the first elapsed time is equal to or longer than the first predetermined time, the high temperature display unit is not subjected to high temperature display, and the output voltage of the charge / discharge circuit unit is When the voltage is less than the first predetermined voltage, the high temperature display unit does not perform high temperature display regardless of the first elapsed time, and the control unit causes the heating unit to start the heating mode. When the integrated heating power from the power source is equal to or higher than the first predetermined power, the output voltage of the charge / discharge circuit unit is the first predetermined voltage when the power is restored after the power failure state during the heating mode. If it is above, the high temperature display by the said high temperature display part will be performed .

これによって、加熱部の近傍に高温表示を行うために温度検知手段を設けなくても、停電状態でも放電動作を継続する充放電回路部の出力電圧に基づき推定される、加熱モードが終了してからの経過時間によって加熱部またはその近傍が高温かどうかを推定することができるため、途中で停電状態が生じても、加熱部が高温かどうかを高精度に判断することができ、コストを安く抑えて高温表示を行うことが可能となる。また、機械的接点を有する温度検知手段を使用しないため、異物の混入による高温表示の動作不良や精度の低下といった不具合が生じることがなく、高精度に高温表示を行うことが可能となる。また、
加熱部の加熱積算電力も加熱部またはその近傍が高温かどうかの判断基準として用いることができるため、停電状態から通電状態に復帰した後でも、高精度に加熱部あるいは加熱部近傍が高温かどうかを判断して高温表示を行うことができる。
As a result, the heating mode, which is estimated based on the output voltage of the charging / discharging circuit unit that continues the discharging operation even in a power failure state, is completed even if no temperature detection means is provided in order to display a high temperature in the vicinity of the heating unit. It is possible to estimate whether the heating part or its vicinity is hot according to the elapsed time from the time, so even if a power failure occurs on the way, it is possible to determine whether the heating part is hot or not, and the cost is low. It is possible to perform high temperature display while suppressing. In addition, since no temperature detecting means having a mechanical contact is used, there is no problem such as malfunction of high temperature display due to mixing of foreign matter and deterioration of accuracy, and high temperature display can be performed with high accuracy. Also,
Since the integrated heating power of the heating part can also be used as a criterion for determining whether the heating part or its vicinity is hot, whether or not the heating part or the vicinity of the heating part is high temperature with high accuracy even after returning from the power failure state to the energized state The high temperature display can be performed by judging the above.

本発明の加熱装置は、停電状態でも放電動作を行う充放電回路部の出力電圧のレベルに基づいて加熱部または加熱部近傍が高温かどうかを判断することによって、途中で停電状態が生じても、加熱部または加熱部近傍が高温かどうかを高精度に判断することができるので、加熱部の近傍に高温表示を行うための温度検知手段を設けずに高温表示の動作を実現でき、コストを安く抑えて高精度に高温表示を行うことができる。また、前記温度検知手段を設ける必要がないため、機械的接点を有する温度検知手段の接点部の接点不良により高温表示の精度が下がるということがなく、高精度に高温表示を行うことができる。また、加熱部の加熱積算電力も加熱部またはその近傍が高温かどうかの判断基準として用いることができるため、停電状態から通電状態に復帰した後でも、高精度に加熱部あるいは加熱部近傍が高温かどうかを判断して高温表示を行うことができる。
The heating device of the present invention determines whether the heating unit or the vicinity of the heating unit is hot based on the level of the output voltage of the charge / discharge circuit unit that performs the discharging operation even in a power failure state, so that even if a power failure state occurs in the middle Since it is possible to determine with high accuracy whether or not the heating unit or the vicinity of the heating unit is high temperature, it is possible to realize a high-temperature display operation without providing a temperature detection means for performing a high-temperature display in the vicinity of the heating unit. High temperature display can be performed with high accuracy while keeping the price low. Further, since it is not necessary to provide the temperature detecting means, the accuracy of the high temperature display is not lowered due to the contact failure of the contact portion of the temperature detecting means having a mechanical contact, and the high temperature display can be performed with high accuracy. In addition, since the integrated heating power of the heating part can also be used as a criterion for determining whether the heating part or its vicinity is hot, the heating part or the vicinity of the heating part is highly accurate even after the power is restored from the power failure state. It is possible to display high temperature by judging whether or not.

本発明の実施の形態１における加熱装置の概略図Schematic of the heating device in Embodiment 1 of the present invention 本発明の実施の形態１における充放電回路部の構成例を示す図The figure which shows the structural example of the charging / discharging circuit part in Embodiment 1 of this invention. 本発明の実施の形態１における高温表示動作の説明図Explanatory drawing of the high temperature display operation in Embodiment 1 of the present invention 本発明の実施の形態１における加熱装置の動作フローチャートOperation flowchart of heating device in Embodiment 1 of the present invention

第１の発明は、被加熱体を加熱する加熱部と、前記加熱部あるいは前記加熱部近傍の温度が高温であることを知らせる高温表示を行う高温表示部と、前記加熱部の加熱出力および前記高温表示部を制御する制御部と、前記制御部が前記加熱部を制御して加熱を行う加熱モード中は充電動作を行い、前記加熱部にて加熱を行わない待機モード中は放電動作を行う充放電回路部と、停電状態ではない場合に前記加熱部が加熱を行っていない期間または前記待機モードを継続している期間である第１の経過時間を計時する計時部と、を備え、前記制御部は、前記充放電回路部の出力電圧が第１の所定電圧以上である期間において、少なくとも前記待機モード中は前記第１の経過時間が第１の所定時間未満であれば前記高温表示部により高温表示を行うとともに前記第１の経過時間が前記第１の所定時間以上になると前記高温表示部の高温表示を行わないようにし、前記充放電回路部の出力電圧が第１の所定電圧未満になると、前記第１の経過時間にかかわらず、前記高温表示部による高温表示を行わないようにするとともに、前記制御部は、前記加熱部が前記加熱モードを開始してからの加熱積算電力が第１の所定電力以上の場合、前記加熱モード中に停電状態となった後、通電状態に復帰したときは、前記充放電回路部の出力電圧が前記第１の所定電圧以上であれば前記高温表示部による高温表示を行うようにしたものである。これによって、加熱部の近傍に高温表示を行うために温度検知手段を設けなくても、停電状態でも放電動作を継続する充放電回路部の出力電圧に基づき推定される、加熱モードが終了してからの経過時間によって加熱部またはその近傍が高温かどうかを推定することができるため、途中で停電状態が生じても、加熱部が高温かどうかを高精度に判断することができ、コストを安く抑えて高温表示を行うことが可能となる。また、機械的接点を有する温度検知手段を使用しないため、異物の混入による高温表示の動作不良や精度の低下といった不具合が生じることがなく、高精度に高温表示を行うことが可能となる。また、加熱部の加熱積算電力も加熱部またはその近傍が高温かどうかの判断基準として用いることができる
ため、停電状態から通電状態に復帰した後でも、高精度に加熱部あるいは加熱部近傍が高温かどうかを判断して高温表示を行うことができる。
1st invention is a heating part which heats a to-be-heated body, a high temperature display part which performs a high temperature display which notifies that the temperature of the heating part or the vicinity of the heating part is high temperature, the heating output of the heating part, and the A control unit that controls the high-temperature display unit and a charging operation during the heating mode in which the control unit controls the heating unit to perform heating, and a discharging operation in the standby mode in which heating is not performed by the heating unit A charging / discharging circuit unit, and a timing unit that counts a first elapsed time that is a period in which the heating unit is not heating or a period in which the standby mode is continued when not in a power failure state, If the output voltage of the charge / discharge circuit section is equal to or higher than the first predetermined voltage, the control section is configured to display the high temperature display section if the first elapsed time is less than the first predetermined time at least during the standby mode. To display high temperature In addition, when the first elapsed time is equal to or longer than the first predetermined time, the high temperature display unit is not displayed at a high temperature, and when the output voltage of the charge / discharge circuit unit is lower than the first predetermined voltage, The high-temperature display by the high-temperature display unit is not performed regardless of the elapsed time of 1, and the control unit has a heating integrated power after the heating unit starts the heating mode as a first predetermined power. In the above case, when the output voltage of the charge / discharge circuit unit is equal to or higher than the first predetermined voltage when the power supply state is restored after the power failure state during the heating mode, the high temperature display unit displays a high temperature. Is to do . As a result, the heating mode, which is estimated based on the output voltage of the charging / discharging circuit unit that continues the discharging operation even in a power failure state, is completed even if no temperature detection means is provided in order to display a high temperature in the vicinity of the heating unit. It is possible to estimate whether the heating part or its vicinity is hot according to the elapsed time from the time, so even if a power failure occurs on the way, it is possible to determine whether the heating part is hot or not, and the cost is low. It is possible to perform high temperature display while suppressing. In addition, since no temperature detecting means having a mechanical contact is used, there is no problem such as malfunction of high temperature display due to mixing of foreign matter and deterioration of accuracy, and high temperature display can be performed with high accuracy. Moreover, the heating integrated power of the heating unit can also be used as a criterion for determining whether the heating unit or its vicinity is at a high temperature.
Therefore, even after returning from the power failure state to the energized state, it is possible to determine whether the heating part or the vicinity of the heating part is hot and display the high temperature with high accuracy.

第２の発明は、特に、第１の発明において、前記計時部は、前記加熱部が前記待機モードを継続したまま停電状態となるまでの第２の経過時間と、停電状態から通電状態に復帰してからの第３の経過時間を計時し、前記第２の経過時間と前記第３の経過時間の積算時間を前記第１の経過時間としたものである。これによって、計時部が第１の経過時間を計時しているときに停電状態となり、その後、停電状態から復帰した後でも、高精度に加熱部あるいは加熱部近傍が高温かどうかを判断することができる。
According to a second aspect of the invention, in particular, in the first aspect of the invention, the timekeeping unit returns from the power failure state to the energized state, and the second elapsed time until the heating unit enters the power failure state while continuing the standby mode. Then, the third elapsed time is counted, and the integrated time of the second elapsed time and the third elapsed time is defined as the first elapsed time. As a result, it becomes possible to determine whether the heating unit or the vicinity of the heating unit is high temperature with high accuracy even after the timing unit is measuring the first elapsed time, and then after the recovery from the power failure state. it can.

（実施の形態１）
図１は、本発明の実施の形態１における加熱装置の概略図を示すものである。 (Embodiment 1)
FIG. 1 shows a schematic diagram of a heating apparatus according to Embodiment 1 of the present invention.

図１において、加熱部１は、例えば、高周波磁界を発生することで加熱を行う誘導加熱コイルや、ヒータ自身の抵抗の発熱で加熱する発熱体ヒータ（ラジエントヒータ等）などにより構成され、鍋などの被加熱体６を加熱する。高温表示部４は加熱部１が加熱モード終了時に加熱部１あるいは加熱部１近傍の温度が高温であることを知らせる高温表示を行い、制御部５は加熱部１の加熱出力および高温表示部４を制御し、充放電回路部２は制御部５が加熱部１を制御して被加熱体６の加熱を行う加熱モードで動作中の時は充電動作を行い、加熱部１にて被加熱体６の加熱を行わない待機モード中は放電動作を行う。計時部３は、例えば、電源供給によって動作し、計時するクロック機能付きのマイコンなどにより構成され、停電状態ではない場合に加熱部１が加熱を行っていない期間または前記待機モードを継続している期間として定義する第１の経過時間を計時する。なお、加熱モードは、使用者の操作によって加熱動作が開始されてから、後に使用者の操作によって加熱動作が終了されるか、または加熱装置の安全機能や保護機能などにより加熱動作が終了するまでの間において、制御部５が加熱部１を制御して加熱出力を調節したり、加熱部１の加熱と停止を繰り返し行い平均して所望の加熱電力になるよう制御するなどの一連の加熱動作を示しており、待機モードは、加熱装置の電源投入直後や、使用者の操作により加熱モードが終了された後などのように、加熱部１の加熱を行わないで使用者の操作を待っている状態であり、使用者の操作が無ければ被加熱体６が加熱されないまま継続する状態を示している。 In FIG. 1, the heating unit 1 includes, for example, an induction heating coil that performs heating by generating a high-frequency magnetic field, a heating element heater (radiant heater or the like) that heats by the heat generated by the resistance of the heater itself, and the like. The heated body 6 is heated. The high temperature display unit 4 performs a high temperature display for notifying that the temperature of the heating unit 1 or the vicinity of the heating unit 1 is high when the heating unit 1 ends the heating mode, and the control unit 5 displays the heating output of the heating unit 1 and the high temperature display unit 4. The charging / discharging circuit unit 2 performs a charging operation when the control unit 5 is operating in the heating mode in which the heating unit 1 is heated by heating the heating unit 1, and the heating unit 1 performs the charging operation. During the standby mode in which the heating 6 is not performed, the discharging operation is performed. The time measuring unit 3 is configured by, for example, a microcomputer with a clock function that operates by supplying power, and keeps the period during which the heating unit 1 is not heating or the standby mode when not in a power failure state. The first elapsed time defined as the period is timed. In the heating mode, after the heating operation is started by the user's operation, the heating operation is later ended by the user's operation or until the heating operation is ended by the safety function or the protection function of the heating device. In between, a series of heating operations such as the control unit 5 controlling the heating unit 1 to adjust the heating output, or repeatedly heating and stopping the heating unit 1 to control it to obtain a desired heating power on average. The standby mode waits for the user's operation without heating the heating unit 1 such as immediately after the heating device is turned on or after the heating mode is ended by the user's operation. It shows a state where the heated body 6 continues without being heated if there is no user operation.

図２は、本発明の実施の形態１における充放電回路部２の構成例を示す図である。 FIG. 2 is a diagram illustrating a configuration example of the charge / discharge circuit unit 2 according to Embodiment 1 of the present invention.

図２において、充放電回路部２は、電荷を充電するためのコンデンサ１３と、コンデンサ１３を充電するための電力を供給する電源１１と、制御部５からの指示により電源１１
からの供給電力をコンデンサ１３に流すか流さないかを切り替えるスイッチング素子１２と、コンデンサ１３が充電した電荷を放電する主経路である抵抗器１４と、で構成されている。スイッチング素子１２は制御部５からの指示により、加熱モード時はオン状態となり、電源１１とコンデンサ１３を導通させてコンデンサ１３への充電を行い、加熱部１が待機モードの時は、制御部５からの導通指示出力によりスイッチング素子１２はオフ状態となり、電源１１とコンデンサ１３を非導通にする。この時、コンデンサ１３に充電された電荷は、抵抗器１４を介して放電され、時間と共にコンデンサ１３の両端電圧が低下する。また、電源１１の供給がない停電状態の場合や、制御部５からスイッチング素子１２への導通指示出力がない場合は、スイッチング素子１２はオフする。このような構成とすることによって、電源１１の供給がない停電状態の場合でも、制御部５はコンデンサ１３の両端電圧を測定することで加熱部１が加熱を停止してからの経過時間を推定することができる。なお、電源１１の電圧値や、コンデンサ１３の静電容量値や、抵抗器の抵抗値を調整することで、加熱部１が加熱を停止してから所定の時間が経過した時のコンデンサ１３の両端電圧を任意の値に設計することができる。 In FIG. 2, the charge / discharge circuit unit 2 includes a capacitor 13 for charging electric charge, a power source 11 for supplying electric power for charging the capacitor 13, and a power source 11 according to an instruction from the control unit 5.
The switching element 12 switches between supplying and not supplying the power supplied from the capacitor 13 and the resistor 14 serving as a main path for discharging the charge charged by the capacitor 13. In response to an instruction from the control unit 5, the switching element 12 is turned on in the heating mode, and the power source 11 and the capacitor 13 are electrically connected to charge the capacitor 13. When the heating unit 1 is in the standby mode, the control unit 5 The switching element 12 is turned off by the conduction instruction output from, and the power supply 11 and the capacitor 13 are made non-conductive. At this time, the electric charge charged in the capacitor 13 is discharged through the resistor 14, and the voltage across the capacitor 13 decreases with time. In addition, when the power supply 11 is not supplied or when there is no conduction instruction output from the control unit 5 to the switching element 12, the switching element 12 is turned off. By adopting such a configuration, the controller 5 estimates the elapsed time after the heating unit 1 stops heating by measuring the voltage across the capacitor 13 even in the case of a power failure state where the power supply 11 is not supplied. can do. In addition, by adjusting the voltage value of the power source 11, the capacitance value of the capacitor 13, and the resistance value of the resistor, the capacitor 13 when the heating unit 1 stops heating and the predetermined time has elapsed. The voltage at both ends can be designed to an arbitrary value.

以上のように構成された加熱装置について、図３、図４を用いてその動作、作用を説明する。 About the heating apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated using FIG. 3, FIG.

図３は、本発明の実施の形態１における高温表示動作の説明図である。 FIG. 3 is an explanatory diagram of the high temperature display operation in the first embodiment of the present invention.

図３（ａ）は、計時部３の計時した時間が第１の所定時間以上となって高温表示を停止する場合の説明図である。加熱部１が加熱モードに移行し、加熱を開始するとすぐに充放電回路部２は充電動作を開始して、出力電圧は所定の電圧となる。加熱部１が加熱モードを終了すると、高温表示部４は前記高温表示を開始する。この時、充放電回路部２は放電を開始するので、出力電圧は時間と共に低下する。一方、計時部３は、加熱部１の加熱モード終了からの時間を計時し始める。高温表示部４は、計時部３による計測時間が第１の所定時間に到達した時点で、前記高温表示を停止する。
図３（ｂ）は、充放電回路部２の出力電圧が第１の所定電圧未満となって高温表示を停止する場合の説明図である。ここでは、加熱部１が加熱モードを終了した後に停電状態に移行した場合を想定しており、停電状態に移行すると、計時部３による計時は停止するが、充放電回路部２による放電動作は継続するため、停電状態から復帰後、計時部３による計測時間が第１の所定時間に到達する前に、充放電回路部２の出力電圧が第１の所定電圧未満となると、高温表示を停止する。 FIG. 3A is an explanatory diagram when the time measured by the time measuring unit 3 is equal to or longer than the first predetermined time and the high temperature display is stopped. As soon as the heating unit 1 shifts to the heating mode and heating is started, the charging / discharging circuit unit 2 starts a charging operation, and the output voltage becomes a predetermined voltage. When the heating unit 1 ends the heating mode, the high temperature display unit 4 starts the high temperature display. At this time, since the charging / discharging circuit unit 2 starts discharging, the output voltage decreases with time. On the other hand, the time measuring unit 3 starts measuring the time from the end of the heating mode of the heating unit 1. The high temperature display unit 4 stops the high temperature display when the time measured by the time measuring unit 3 reaches the first predetermined time.
FIG. 3B is an explanatory diagram in the case where the output voltage of the charge / discharge circuit unit 2 is less than the first predetermined voltage and the high temperature display is stopped. Here, it is assumed that the heating unit 1 has shifted to the power failure state after finishing the heating mode. When the heating unit 1 shifts to the power failure state, the timing by the timing unit 3 is stopped, but the discharging operation by the charge / discharge circuit unit 2 is performed. In order to continue, when the output voltage of the charging / discharging circuit unit 2 becomes lower than the first predetermined voltage before the measurement time by the time measuring unit 3 reaches the first predetermined time after returning from the power failure state, the high temperature display is stopped. To do.

図４は、本発明の実施の形態１における加熱装置の動作を示すフローチャートである。 FIG. 4 is a flowchart showing the operation of the heating device according to Embodiment 1 of the present invention.

まず、ＳＴＥＰ１において加熱モードに移行すると、ＳＴＥＰ２において、充放電回路部２が充電動作を開始し、その後、ＳＴＥＰ３において停電状態ではないと判断された場合、ＳＴＥＰ４において加熱モード中かどうかを判定する。ＳＴＥＰ４にて、加熱モード中であった場合はＳＴＥＰ３に戻り、ＳＴＥＰ４にて加熱モードが終了されていたなど加熱モードではなかった場合、ＳＴＥＰ５に進んで、充放電回路部２が放電動作を開始する。ＳＴＥＰ６では、計時部３が、加熱部１の加熱モード終了からの時間（第１の経過時間）を計時し始める。その後、ＳＴＥＰ７において、加熱部１の前回の加熱モード時の加熱積算電力など、加熱部１または加熱部１近傍が高温かどうかを判断できる情報に基づき、加熱部１または加熱部１近傍が高温ではないと判断され、高温表示部４が高温表示を行っていなかった場合、ＳＴＥＰ８に移行し、前記高温表示を行っていない加熱待機状態となる。一方、ＳＴＥＰ７において、加熱部１あるいは加熱部１近傍の温度が高温であると判断され、高温表示部４が高温表示を行っていた場合、ＳＴＥＰ９に進み、停電状態であるかを判断する。ＳＴＥＰ９にて、停電状態ではないと判断された場合、ＳＴＥＰ１０にて、計時部３が計時した第１の経過時間が第１の所定時間以上かを判断する。第１の経過時
間が第１の所定時間以上の場合、加熱部１あるいは加熱部１近傍の温度が高温ではなくなったと判断してＳＴＥＰ８に移行し、高温表示部４が高温表示を行わなくなる。ＳＴＥＰ１０にて、第１の経過時間が第１の所定時間以上でなかった場合、ＳＴＥＰ１１にて充放電回路部２の出力電圧が第１の所定電圧未満であるかを判断する。第１の所定電圧未満であった場合、加熱部１あるいは加熱部１近傍の温度が高温ではなくなったと判断してＳＴＥＰ８に移行し、高温表示部４が高温表示を行わなくなる。ＳＴＥＰ１１にて第１の所定電圧以上であった場合、ＳＴＥＰ９に戻る。ＳＴＥＰ９にて、停電状態であると判断された場合、ＳＴＥＰ１２にて停電状態から復帰するのを待つ。また一方、ＳＴＥＰ３において停電状態であると判断された場合も、加熱部１は停電状態であり加熱モード中ではないので、ＳＴＥＰ１３で充放電回路部２が放電動作を開始した後、ＳＴＥＰ１２に移行する。停電状態から復帰した場合、ＳＴＥＰ１４に移行し、充放電回路部２の出力電圧が第１の所定電圧未満であるかを判断する。充放電回路部２の出力電圧が第１の所定電圧以上である場合、加熱部１の加熱動作停止から十分な時間が経っておらず、加熱部１あるいは加熱部１近傍の温度が高温であると判断し、ＳＴＥＰ１５に移行し、高温表示部４で高温表示を行い、ＳＴＥＰ１４に戻る。ＳＴＥＰ１４で充放電回路部２の出力電圧が第１の所定電圧未満である場合、加熱部１の加熱動作停止から十分な時間が経っており、加熱部１あるいは加熱部１近傍の温度が高温ではないと判断し、ＳＴＥＰ８に移行し、高温表示部４における高温表示を行わないようにする。 First, when shifting to the heating mode in STEP 1, the charging / discharging circuit unit 2 starts a charging operation in STEP 2, and then, in STEP 3, it is determined whether or not the heating mode is in progress in STEP 4. If the heating mode is in STEP4, the process returns to STEP3. If the heating mode is not in the heating mode, such as the heating mode is terminated in STEP4, the process proceeds to STEP5 and the charge / discharge circuit unit 2 starts the discharge operation. . In STEP 6, the time measuring unit 3 starts measuring the time (first elapsed time) from the end of the heating mode of the heating unit 1. After that, in STEP 7, based on information that can determine whether the heating unit 1 or the vicinity of the heating unit 1 is at a high temperature, such as the heating integrated power in the previous heating mode of the heating unit 1, if the heating unit 1 or the vicinity of the heating unit 1 is at a high temperature If it is determined that the high temperature display unit 4 has not performed the high temperature display, the process proceeds to STEP 8 and enters a heating standby state in which the high temperature display is not performed. On the other hand, if it is determined in STEP 7 that the temperature of the heating unit 1 or the vicinity of the heating unit 1 is high, and the high temperature display unit 4 performs a high temperature display, the process proceeds to STEP 9 to determine whether it is in a power failure state. If it is determined in STEP 9 that the power outage is not occurring, it is determined in STEP 10 whether the first elapsed time measured by the time measuring unit 3 is equal to or longer than the first predetermined time. When the first elapsed time is equal to or longer than the first predetermined time, it is determined that the temperature of the heating unit 1 or the vicinity of the heating unit 1 is no longer high, and the process proceeds to STEP 8, and the high temperature display unit 4 does not perform high temperature display. In STEP 10, if the first elapsed time is not equal to or longer than the first predetermined time, it is determined in STEP 11 whether the output voltage of the charge / discharge circuit unit 2 is less than the first predetermined voltage. When the voltage is lower than the first predetermined voltage, it is determined that the temperature of the heating unit 1 or the vicinity of the heating unit 1 is no longer high, and the process proceeds to STEP 8, and the high temperature display unit 4 does not perform high temperature display. If the voltage is equal to or higher than the first predetermined voltage in STEP 11, the process returns to STEP 9. If it is determined in STEP 9 that a power failure has occurred, it waits for a recovery from the power failure in STEP 12. On the other hand, even if it is determined in STEP 3 that it is in a power failure state, since the heating unit 1 is in a power failure state and not in the heating mode, the charging / discharging circuit unit 2 starts a discharging operation in STEP 13 and then proceeds to STEP 12. . When returning from the power failure state, the process proceeds to STEP 14 and it is determined whether the output voltage of the charge / discharge circuit unit 2 is less than the first predetermined voltage. When the output voltage of the charging / discharging circuit unit 2 is equal to or higher than the first predetermined voltage, sufficient time has not passed since the heating operation of the heating unit 1 is stopped, and the temperature of the heating unit 1 or the vicinity of the heating unit 1 is high. It moves to STEP15, a high temperature display is performed in the high temperature display part 4, and it returns to STEP14. When the output voltage of the charging / discharging circuit unit 2 is lower than the first predetermined voltage in STEP 14, a sufficient time has passed since the heating operation of the heating unit 1 was stopped, and the temperature of the heating unit 1 or the vicinity of the heating unit 1 is high. If it is determined that there is not, the process proceeds to STEP 8 so that the high-temperature display in the high-temperature display unit 4 is not performed.

以上の構成により、加熱部１の近傍に高温表示を行うための温度検知手段を設けることなく、停電状態でも放電動作を継続する充放電回路部２の出力電圧に基づき推定される、加熱モードが終了してからの第１の経過時間によって加熱部１の高温の有無を判断することができるため、途中で停電状態が生じても、加熱部１が高温かどうかを高精度に判断することができるので、コストを安く抑えて高温表示を行うことが可能となる。また、機械的接点を有する温度検知手段を使用しないため、異物の混入による高温表示の動作不良または精度の低下といった不具合が生じることがなく、高精度に高温表示を行うことが可能となる。 With the above configuration, the heating mode estimated based on the output voltage of the charge / discharge circuit unit 2 that continues the discharge operation even in a power failure state without providing a temperature detection means for performing high temperature display in the vicinity of the heating unit 1 is provided. Since it is possible to determine whether or not the heating unit 1 is at a high temperature based on the first elapsed time after the end, it is possible to determine with high accuracy whether or not the heating unit 1 is at a high temperature even if a power failure occurs in the middle. As a result, high temperature display can be performed at low cost. In addition, since no temperature detecting means having a mechanical contact is used, there is no problem such as malfunction of high temperature display due to mixing of foreign matter or deterioration in accuracy, and high temperature display can be performed with high accuracy.

なお、本実施の形態において、充放電回路部２は、加熱部１が加熱モードの時は充電動作を行い、加熱部１が加熱モードではない時は放電動作を行うとしたが、充放電回路部２は、加熱部１が加熱を行っている時に充電動作を行い、加熱部１が加熱を行っていない時に放電動作を行うようにしてもよく、その場合は実際に加熱部１が加熱停止してからの放電動作となるので、待機モードに移行したときから放電動作を行う場合よりもさらに精度の高い高温表示の停止のタイミングとすることができる。さらに、加熱部１の加熱の有無によって充放電回路部２が充放電を行うことによって、制御部５から加熱部１への加熱制御のための出力信号を利用して、充放電回路部２の充放電を制御することができるので、充放電を制御するための電子回路部品や配線を省くことが可能であり、回路の小型化や、コストダウンを図ることができる。但し、例えば、加熱部１を誘導加熱方式とする場合に被加熱体６が加熱可能かどうかを判定するために低出力で加熱部１を動作させる場合や、加熱部１またはその駆動経路が正常に動作しているかを確認する場合など、被加熱体６を加熱する目的以外で加熱部１を動作させる条件が存在する場合は、充放電回路部２が満充電とならないように動作時間や出力下限値などにより加熱目的と区別するか、または、充電経路に抵抗を設けて充電時間を長くし、加熱時間に応じて充電量が増加するようにし、長時間の加熱では満充電になるが、短時間の加熱では満充電とはならないようにするなどの対応をする必要がある。しかしながら、充電経路に抵抗を設ける上記の構成を採用すれば、加熱時間に応じて充放電回路部２の充電量が増加するので、加熱部１の温度上昇に則して充電され、温度低下に則して放電することとなり、より精度が高く加熱部１が高温かどうかを推定することが可能になるという優れた効果を創出することもできる。 In the present embodiment, the charging / discharging circuit unit 2 performs the charging operation when the heating unit 1 is in the heating mode, and performs the discharging operation when the heating unit 1 is not in the heating mode. The unit 2 may perform a charging operation when the heating unit 1 is heating, and may perform a discharging operation when the heating unit 1 is not heating, in which case the heating unit 1 actually stops heating. Therefore, the high-temperature display can be stopped more accurately than when the discharge operation is performed after shifting to the standby mode. Furthermore, when the charging / discharging circuit unit 2 performs charging / discharging depending on whether the heating unit 1 is heated, the output signal for the heating control from the control unit 5 to the heating unit 1 is used. Since charging / discharging can be controlled, electronic circuit components and wiring for controlling charging / discharging can be omitted, and the circuit can be reduced in size and cost can be reduced. However, for example, when the heating unit 1 is an induction heating method, the heating unit 1 is operated at a low output to determine whether the heated body 6 can be heated, or the heating unit 1 or its drive path is normal. When there is a condition for operating the heating unit 1 other than for the purpose of heating the object 6 to be heated, such as when checking whether the charging / discharging circuit unit 2 is fully charged, Distinguish it from the purpose of heating by the lower limit value, etc., or provide a charging path to increase the charging time and increase the charging amount according to the heating time. It is necessary to take measures such as preventing the battery from being fully charged by short-time heating. However, if the above-described configuration in which a resistance is provided in the charging path is employed, the charge amount of the charge / discharge circuit unit 2 increases according to the heating time. Therefore, it is possible to create an excellent effect that it is possible to estimate whether or not the heating unit 1 has a high temperature with higher accuracy.

また、本実施の形態における停電状態とは、少なくとも計時部３が計時を行えないかま
たは計時を行えなくなることが予測できる状態であり、例えば、交流電源の周期をクロック情報として利用して計時を行う場合にクロック情報となる交流電源の周期情報が取得できなくなる場合や、計時部３の駆動電源が低下して計時部３が動作しないか、または動作しなくなることが予測できる場合などがこれにあたる。したがって、例えば電池駆動の加熱装置であっても、電池の交換や消耗により計時部３が動作しないか、またはもうすぐ動作しなくなることが予測できる場合に装置の機能を一部停止するような状態も停電状態とみなすことができる。 Further, the power failure state in the present embodiment is a state in which at least the time measuring unit 3 cannot predict time or cannot predict time. For example, the time is measured using the cycle of the AC power supply as clock information. This is the case when the period information of the AC power source that becomes clock information cannot be acquired when performing, or when the driving power source of the timing unit 3 decreases and the timing unit 3 does not operate or can be predicted not to operate. . Therefore, for example, even in the case of a battery-powered heating device, there is a state in which the function of the device is partially stopped when it is predicted that the timekeeping unit 3 will not operate due to battery replacement or exhaustion, or will soon stop operating. It can be regarded as a power failure state.

また、制御部５は、停電状態になる直前の状態が加熱モード中であり、その時の加熱積算電力が第１の所定電力以上であった場合、停電状態から復帰した後、充放電回路部２の出力電圧が前記第１の所定電圧以上であれば高温表示部４による高温表示を行うようにし、充放電回路部２の出力電圧が第１の所定電圧未満であれば高温表示部４による高温表示を行わないようにすることで、加熱部１の加熱積算電力も加熱部が高温かどうかの判断基準として用いることができるため、高精度に加熱部１あるいは加熱部１近傍が高温かどうかを判断することができる。ここで、高温表示を行うための判断として加熱部１の加熱積算電力を用いた理由は、加熱積算電力が多くなれば被加熱物に加える熱量も多くなり、また、同じ火力で加熱した場合の加熱部１の発熱量も多くなるので、加熱積算電力によって加熱部１または加熱部１近傍の温度が推定可能であるからである。 In addition, when the state immediately before the power failure state is in the heating mode and the integrated heating power at that time is equal to or higher than the first predetermined power, the control unit 5 returns from the power failure state, and then the charge / discharge circuit unit 2 If the output voltage of the charging / discharging circuit unit 2 is lower than the first predetermined voltage, the high temperature display unit 4 performs a high temperature display. By not displaying, since the heating integrated power of the heating unit 1 can also be used as a criterion for determining whether the heating unit is hot, it is highly accurate whether the heating unit 1 or the vicinity of the heating unit 1 is hot. Judgment can be made. Here, the reason for using the heating integrated power of the heating unit 1 as a judgment for performing the high temperature display is that if the heating integrated power increases, the amount of heat applied to the object to be heated also increases, and the case of heating with the same thermal power This is because the heating value of the heating unit 1 is also increased, so that the temperature of the heating unit 1 or the vicinity of the heating unit 1 can be estimated by the integrated heating power.

また、前記高温表示を行うための判断として加熱部１の加熱積算電力を用いたが、加熱積算電力は商用電源からの供給電圧が一定であると仮定して加熱部１への供給電流を積算することで算出してもよく、または、使用者が設定した火力を加熱装置は認識可能であり、設定火力と加熱積算時間から加熱積算電力を算出することが可能なため、例えば、設定火力毎に設定値を設け、設定火力に応じた設定値に設定火力毎の加熱積算時間を乗じることで、加熱積算時間を簡易的に算出するなどの方法を採用してもよい。 Moreover, although the heating integrated power of the heating part 1 was used as a judgment for performing the high temperature display, the heating integrated power integrated the supply current to the heating part 1 on the assumption that the supply voltage from the commercial power source is constant. The heating device can recognize the thermal power set by the user, and the heating integrated power can be calculated from the set thermal power and the heating integrated time. A method may be employed in which the heating integrated time is simply calculated by providing a setting value for the heating power and multiplying the setting value according to the setting thermal power by the heating integrated time for each setting thermal power.

また、計時部３は、第１の経過時間を計時する際、加熱モードを終了してから停電状態となるまでの第２の経過時間と、停電状態から復帰してからの第３の経過時間とを分けて計時する機能を有し、第２の経過時間と第３の経過時間との積算時間を第１の経過時間とし、制御部５は、第３の経過時間が第１の所定時間よりも短い第２の所定時間となるか、第２の経過時間と第３の経過時間の積算時間、すなわち第１の経過時間が第１の所定時間となった場合に、高温表示部４による高温表示を行わないようにすると、加熱部１が加熱モードを終了してから停電状態となるまでの第２の経過時間と、停電状態から復帰してからの第３の経過時間も、加熱部１が高温かどうかの判断基準として用いることができ、高精度に加熱部１あるいは加熱部１近傍が高温かどうかを判断することができる。すなわち、停電状態から通電状態に復帰した際、停電前の第２の経過時間が長い場合は停電状態から通電状態に復帰した後の第３の経過時間は短くても加熱部１の温度は十分低下していると判断することができる。但し、第２の経過時間は停電状態を経由する際に消失してはならないので、停電状態となる前後で第２の経過時間を停電状態でも記憶できる不揮発性のメモリ等に記憶させておく必要がある。もちろん、第２の経過時間と第３の経過時間を必ずしも分けて計時する必要はなく、第１の経過時間として計時し、停電状態の間は第１の経過時間の計時を一時的に停止して、停電状態から通電状態に復帰すると第１の経過時間を停電状態の前の状態から継続して計時するようにすることでも同様の結果が得られる。 In addition, when the time measuring unit 3 measures the first elapsed time, the second elapsed time from the end of the heating mode to the power failure state and the third elapsed time after returning from the power failure state And the control unit 5 sets the accumulated time of the second elapsed time and the third elapsed time as the first elapsed time, and the control unit 5 sets the third elapsed time to the first predetermined time. By the high-temperature display unit 4 when the second predetermined time is shorter or the integrated time of the second elapsed time and the third elapsed time, that is, the first elapsed time becomes the first predetermined time. If the high temperature display is not performed, the second elapsed time from when the heating unit 1 ends the heating mode to the power failure state, and the third elapsed time after the recovery from the power failure state, the heating unit 1 1 can be used as a criterion for determining whether the temperature is high, and the heating unit 1 or the heating unit with high accuracy. It can vicinity to determine whether a high temperature. That is, when the second elapsed time before the power failure is long when returning from the power failure state to the energized state, the temperature of the heating unit 1 is sufficient even if the third elapsed time after returning from the power failure state to the energized state is short It can be judged that it has decreased. However, since the second elapsed time must not disappear when going through the power failure state, it is necessary to store the second elapsed time in a non-volatile memory or the like that can store the second elapsed time even before the power failure state. There is. Of course, it is not always necessary to measure the second elapsed time and the third elapsed time separately, the first elapsed time is counted, and the first elapsed time is temporarily stopped during a power failure state. Then, when returning from the power failure state to the energized state, the same result can be obtained by continuously counting the first elapsed time from the state before the power failure state.

また、本実施の形態の計時部３は、加熱モードを終了して待機モードに移行すると第１の経過時間または第２の経過時間の計時を開始するようにしたが、使用者の操作または異常発生時などにおけるモードの移行のタイミングではなく、加熱モード中のオンオフ動作を含めて加熱部１が加熱を行っていない期間の継続時間を計時するようにしても良い。その場合は、実際に加熱部１が加熱を行っていない期間の継続時間を計時するので、加熱部１の温度低下を時間で測定する計時部３においてさらに精度良く加熱部１またはその近傍
が高温かどうかの推定をすることができる。但し、例えば、加熱部１を誘導加熱方式とする場合に被加熱体６が加熱可能かどうかを判定するために低出力で加熱部１を動作させる場合や、加熱部１またはその駆動経路が正常に動作しているかを確認する場合など、被加熱体６を加熱する目的以外で加熱部１を動作させる条件が存在する場合は、加熱以外の目的で加熱部１が動作するときに計時部３の計時が最初から行われないように動作時間や出力下限値などにより加熱目的と区別して制御する必要がある。 In addition, the timing unit 3 of the present embodiment is configured to start measuring the first elapsed time or the second elapsed time when the heating mode is ended and the standby mode is shifted. You may make it time not the timing of mode transition at the time of generation | occurrence | production, but the duration of the period when the heating part 1 is not heating including the ON / OFF operation | movement in heating mode. In that case, since the duration of the period during which the heating unit 1 is not actually heating is timed, the heating unit 1 or its vicinity is more accurately heated in the time measuring unit 3 that measures the temperature drop of the heating unit 1 over time. You can make an estimate. However, for example, when the heating unit 1 is an induction heating method, the heating unit 1 is operated at a low output to determine whether the heated body 6 can be heated, or the heating unit 1 or its drive path is normal. When there is a condition for operating the heating unit 1 other than for the purpose of heating the object 6 to be heated, such as when checking whether the heating unit 1 is operating for a purpose other than heating, the timing unit 3 It is necessary to control it separately from the heating purpose by operating time, output lower limit value, etc. so that the time measurement is not performed from the beginning.

また、充放電回路部２の放電時間の設計において、例えば加熱部１があらゆる条件を鑑みても、加熱モード終了後、３０分経過したら加熱部１および加熱部１近傍が高温ではなくなるとすると、一般的に、マイコンなどで経過時間を計時する計時部３より、電荷の充放電により経過時間を推定する充放電回路部２の方が計時精度は低いため、使用者の安全を考えて、充放電回路部２では、高温表示を少なくとも３０分以上行えるようにコンデンサ１３の容量または抵抗器１４の抵抗値を設定し、回路の構成部品のばらつきが最大となった時でも、満充電から放電して第１の所定電圧未満になるまでの時間を少なくとも３０分以上となるように設計すると良い。その結果、充放電回路部２のばらつきによっては放電時間が長くなってしまうような場合があるが、この時、比較的計時精度の高い計時部３によって計時された第２の経過時間または第３の経過時間を用いて、高温表示を行う上限時間を設けることによって、加熱部１または加熱部１近傍の温度が高温ではないにも関わらず、高温表示をいつまでも行ってしまうという、使用者に誤解を与えるような機会を減らすことができる。 Further, in the design of the discharge time of the charge / discharge circuit unit 2, for example, even if the heating unit 1 considers all conditions, if the heating unit 1 and the vicinity of the heating unit 1 are not at a high temperature after 30 minutes have elapsed after the end of the heating mode, In general, the charging / discharging circuit unit 2 that estimates the elapsed time by charging / discharging the charge has a lower timing accuracy than the timing unit 3 that measures the elapsed time with a microcomputer or the like. In the discharge circuit unit 2, the capacitance of the capacitor 13 or the resistance value of the resistor 14 is set so that a high-temperature display can be performed for at least 30 minutes or more. Thus, it is preferable that the time until the voltage becomes lower than the first predetermined voltage is designed to be at least 30 minutes. As a result, the discharge time may become longer depending on the variation of the charge / discharge circuit unit 2, but at this time, the second elapsed time or the third time measured by the time measuring unit 3 having relatively high time measuring accuracy. By providing an upper limit time for performing a high temperature display using the elapsed time, it is misunderstood to the user that the high temperature display will be performed indefinitely even though the temperature near the heating unit 1 or the heating unit 1 is not high. Can reduce the opportunity to give

以上のように、本発明にかかる加熱装置は、加熱途中で停電状態が生じても、加熱部または加熱部近傍の高温の有無を高精度に判断することができるので、加熱調理器やその他、高温表示を行って安全を確保するあらゆる加熱装置に適用することができる。 As described above, the heating device according to the present invention can accurately determine the presence or absence of a high temperature in the vicinity of the heating unit or the heating unit even if a power failure occurs in the middle of heating. The present invention can be applied to any heating device that performs high temperature display and ensures safety.

１加熱部
２充放電回路部
３計時部
４高温表示部
５制御部 DESCRIPTION OF SYMBOLS 1 Heating part 2 Charge / discharge circuit part 3 Time measuring part 4 High temperature display part 5 Control part

Claims

A heating unit for heating the object to be heated;
A high temperature display unit for performing a high temperature display informing that the temperature of the heating unit or the vicinity of the heating unit is high; and
A control unit for controlling the heating output of the heating unit and the high temperature display unit;
A charging / discharging circuit unit that performs a charging operation during a heating mode in which the control unit controls the heating unit to perform heating, and performs a discharging operation during a standby mode in which heating is not performed in the heating unit;
A timekeeping unit for measuring a first elapsed time which is a period in which the heating unit is not heating when not in a power failure state or a period in which the standby mode is continued;
With
In the period when the output voltage of the charge / discharge circuit unit is equal to or higher than the first predetermined voltage, the control unit displays the high temperature if the first elapsed time is less than the first predetermined time at least during the standby mode. When the first elapsed time is equal to or longer than the first predetermined time, the high temperature display is not displayed, and the output voltage of the charge / discharge circuit unit is set to the first predetermined voltage. When it is less than, the high temperature display by the high temperature display unit is not performed regardless of the first elapsed time ,
When the heating integrated power after the heating unit starts the heating mode is equal to or higher than the first predetermined power, the control unit is in a power failure state during the heating mode and then returns to the energized state. ,
The output voltage of the charge-discharge circuit portion is to perform the hot display by the hot display unit if said first predetermined voltage or higher, the heating apparatus.

The timekeeping unit measures the second elapsed time until the heating unit enters a power failure state while continuing the standby mode, and the third elapsed time after the power failure state returns to the energized state, The heating apparatus according to claim 1, wherein an accumulated time of the second elapsed time and the third elapsed time is the first elapsed time.