JPH0791669A - Cooker - Google Patents
CookerInfo
- Publication number
- JPH0791669A JPH0791669A JP23968893A JP23968893A JPH0791669A JP H0791669 A JPH0791669 A JP H0791669A JP 23968893 A JP23968893 A JP 23968893A JP 23968893 A JP23968893 A JP 23968893A JP H0791669 A JPH0791669 A JP H0791669A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- food
- detecting means
- output
- radiant heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Electric Ovens (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は電子レンジなどの調理装
置における食品の自動調理に関し、特に食品の表面温度
を非接触で測定する赤外線検出手段を備えた調理装置の
改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to automatic cooking of food in a cooking apparatus such as a microwave oven, and more particularly to improvement of a cooking apparatus equipped with infrared detecting means for measuring the surface temperature of food in a non-contact manner.
【０００２】[0002]
【従来の技術】従来この種の調理装置例えば電子レンジ
は、実開昭５８−１５８２０２号公報に記載されてい
る。図６に示すように、調理室１内に食品２や皿３を載
せるための調理台４があり、さらにこの食品２を調理す
る加熱手段５、非接触で調理台４上に載せられた食品２
の温度を検出する表面温度検出手段６、この表面温度検
出手段６の出力が所定値に達した場合、加熱手段５によ
る食品２への加熱を停止する完了判定手段７とを備えて
いる。2. Description of the Related Art Conventionally, a cooking apparatus of this type, for example, a microwave oven is described in Japanese Utility Model Laid-Open No. 58-158202. As shown in FIG. 6, there is a cooking table 4 on which the food 2 and the plate 3 are placed in the cooking chamber 1, and a heating means 5 for cooking the food 2 and a food placed on the cooking table 4 in a non-contact manner. Two
The surface temperature detecting means 6 for detecting the temperature of 1 and the completion determining means 7 for stopping the heating of the food 2 by the heating means 5 when the output of the surface temperature detecting means 6 reaches a predetermined value.
【０００３】調理台４は食品２の加熱ムラを低減するた
め、加熱手段５によって食品２を電波加熱する場合常時
食品２を回転させる（例えば１０秒間で１周させる）タ
ーンテーブルである。The cooking table 4 is a turntable that constantly rotates the food 2 (for example, makes one revolution in 10 seconds) when the food 2 is heated by the heating means 5 in order to reduce uneven heating of the food 2.
【０００４】加熱手段５は、マグネトロンからなり所定
のパワー出力で食品２をマイクロ波加熱する。The heating means 5 comprises a magnetron and microwaves the food 2 with a predetermined power output.
【０００５】表面温度検出手段６は例えば１素子のサー
モパイル型の赤外線センサで構成され、調理室１の天井
面に固定され、開口窓を介して調理台４の中央付近に置
かれた食品２から放射される熱エネルギーを非接触で検
出し温度に換算する。表面温度検出手段６は例えば図７
のように示される。６ａは食品２から放射される輻射熱
（赤外線）を効率よく集光するもので赤外線を透過させ
る材質（例えばシリコン）からなる集光レンズである。
６ｂは集光レンズ６ａで集められた食品２からの輻射熱
を熱電変換するサーモパイル素子で、６ｃはこのサーモ
パイル素子６ｂの出力信号を例えば１０００倍に増幅す
る増幅回路である。The surface temperature detecting means 6 is composed of, for example, a one-element thermopile type infrared sensor, is fixed to the ceiling surface of the cooking chamber 1, and the food 2 placed near the center of the cooking table 4 through the opening window. The radiated heat energy is detected without contact and converted to temperature. The surface temperature detecting means 6 is shown in FIG.
As shown. Reference numeral 6a is a condenser lens that efficiently collects radiant heat (infrared rays) emitted from the food 2 and is made of a material (for example, silicon) that transmits infrared rays.
Reference numeral 6b is a thermopile element that thermoelectrically converts radiant heat from the food 2 collected by the condenser lens 6a, and reference numeral 6c is an amplifier circuit that amplifies the output signal of the thermopile element 6b 1000 times, for example.
【０００６】サーモパイル素子６ｂはゼーベック効果を
利用したものでビスマス−アンチモンといった異種金属
材料を数十対から数百対にわたり接合した熱電対を備え
ており、熱電対の温接点と冷接点間に生じた温度差に対
応した電位差を取り出すしくみとなっている。接合部の
温接点は光軸の中心付近に配置され、食品２から放射さ
れる輻射熱を受けやすくするよう金黒と呼ばれる吸熱材
を塗布している。一方接合部の冷接点はヒートシンクを
介し熱伝導率の高い外側の金属缶に熱結合し出来るだけ
温度変動しないように構成されている。The thermopile element 6b utilizes the Seebeck effect and is equipped with a thermocouple in which several tens to several hundreds of different metal materials such as bismuth-antimony are joined, and the thermopile element 6b is formed between the hot junction and the cold junction of the thermocouple. It is a mechanism to extract the potential difference corresponding to the temperature difference. The hot junction of the joint is arranged near the center of the optical axis, and a heat absorbing material called gold black is applied so as to easily receive the radiant heat emitted from the food 2. On the other hand, the cold junction at the joint is configured to be thermally coupled to the outer metal can having a high thermal conductivity via a heat sink so that the temperature does not fluctuate as much as possible.
【０００７】いま食品２から集光レンズ６ａを介してサ
ーモパイル素子６ｂに対し輻射熱エネルギーが入射した
場合、温接点は冷接点に比べわずかに温度上昇を生じ
る。サーモパイル素子６ｂはこの温接点と冷接点と間に
発生した温度差をゼーベック効果を用いて起電力（例え
ば１０μＶ／℃）に変換するものである。増幅回路６ｃ
はサーモパイル素子からの出力電圧を例えば１０００倍
に増幅し電圧Ｖ1（Ｖ）を出力する。一方６ｄは冷接点
温度検出サーミスタであり、サーモパイル素子６ｂに熱
結合されている。冷接点温度検出サーミスタ６ｄの出力
はさらに直線化回路６ｅで直線化され、冷接点温度に比
例する電圧Ｖ2（Ｖ）を出力する。最後に食品温度算出
部６ｆは増幅回路６ｃから出力される電圧Ｖ1（Ｖ）と
直線化回路６ｅから出力される電圧Ｖ2（Ｖ）とを合成
し食品２の温度に換算し、完了判定手段７に伝える。When radiant heat energy enters the thermopile element 6b from the food 2 through the condenser lens 6a, the temperature of the hot junction slightly rises as compared with that of the cold junction. The thermopile element 6b converts the temperature difference generated between the hot junction and the cold junction into an electromotive force (for example, 10 μV / ° C.) using the Seebeck effect. Amplifier circuit 6c
Outputs the voltage V1 (V) by amplifying the output voltage from the thermopile element 1000 times, for example. On the other hand, 6d is a cold junction temperature detecting thermistor, which is thermally coupled to the thermopile element 6b. The output of the cold junction temperature detecting thermistor 6d is further linearized by the linearizing circuit 6e and outputs a voltage V2 (V) proportional to the cold junction temperature. Finally, the food temperature calculation unit 6f synthesizes the voltage V1 (V) output from the amplifier circuit 6c and the voltage V2 (V) output from the linearization circuit 6e to convert it into the temperature of the food 2, and the completion determination means 7 Tell.
【０００８】一般に増幅回路６ｃすなわちサーモパイル
素子６ｂから出力される電圧Ｖ1（Ｖ）は食品２からの
入射エネルギーに比例し、 Ｔ1（Ｋ）：食品２温度 Ｔ2（Ｋ）：冷接点近傍温度 η：食品２の放射率 ｋ：定数（ステファン・ボルツマン定数＊センサ感度＊
増幅率） とすると、ステファン−ボルツマンの法則に基づき Ｖ1＝Ｋ＊（η＊Ｔ14−Ｔ24）・・・・・・・・・・・（式１） で表すことができる。ここで食品２の放射率ηを一定
（例えば０．９３）、また電圧Ｖ2（Ｖ）はＴ2（Ｋ）に
比例し、Ｔ2（Ｋ）の変動幅が小さいとすれば（式１）
は、 Ｔ1＝ｋ1＊Ｖ11/4＋ｋ2＊Ｖ2＋ｋ3・・・・・・・・・（式２） ｋ1、ｋ2、ｋ3：定数によって定まる値 に変形近似できる。つまりＶ1（Ｖ）及びＶ2（Ｖ）から
測温したい食品２の表面温度Ｔ1（Ｋ）を算出できるこ
とになる。実際には例えば集光レンズ６ａが透過する赤
外線量が波長すなわち輻射温度によって異なるなどの理
由により、基本となる（式１）に完全には合致しない。
特に食品２が限定された狭い温度帯にある場合は Ｔ1＝ｋ1＊Ｖ1＋ｋ2＊Ｖ2＋ｋ3 ・・・・・・・・・・（式３） ｋ1、ｋ2、ｋ3：定数Ｋによって定まる値 といった１次式で温度換算してよい。または（式３）に
おけるｋ1、ｋ2、ｋ3の値を使用温度帯や調理メニュー
ごとに切替え複合化してＴ1（Ｋ）を求めてもよい。Generally, the voltage V1 (V) output from the amplifier circuit 6c, that is, the thermopile element 6b is proportional to the incident energy from the food 2. T1 (K): Food 2 temperature T2 (K): Cold junction vicinity temperature η: Emissivity of food 2 k: constant (Stefan-Boltzmann constant * sensor sensitivity *
Amplification rate), V1 = K * (η * T1 4 −T2 4 ) ... (Equation 1) based on the Stefan-Boltzmann law. If the emissivity η of the food 2 is constant (for example, 0.93), the voltage V2 (V) is proportional to T2 (K), and the fluctuation range of T2 (K) is small (Equation 1).
T1 = k1 * V1 1/4 + k2 * V2 + k3 ... (Equation 2) k1, k2, k3: can be transformed and approximated to values determined by constants. That is, the surface temperature T1 (K) of the food 2 to be measured can be calculated from V1 (V) and V2 (V). In reality, for example, the amount of infrared light transmitted through the condenser lens 6a differs depending on the wavelength, that is, the radiation temperature, and the like, and does not completely match the basic (formula 1).
Especially when the food 2 is in a limited narrow temperature zone, T1 = k1 * V1 + k2 * V2 + k3 (Equation 3) k1, k2, k3: A linear expression such as a value determined by a constant K You can convert the temperature with. Alternatively, the values of k1, k2, and k3 in (Equation 3) may be switched and combined for each operating temperature zone or cooking menu to obtain T1 (K).
【０００９】[0009]
【発明が解決しようとする課題】しかしながら上記従来
の構成では表面温度検出手段６近傍の雰囲気温度変動な
どにより実際のサーモパイル素子６ｂ中の冷接点温度と
冷接点温度検出サーミスタ６ｄから直線化回路６ｅを介
し出力される電圧Ｖ2（Ｖ）との間でアンバランスが生
じ、結果的に換算される食品２の表面温度Ｔ1（Ｋ）に
測定誤差が出るという課題があった。この原因は伝導熱
によって冷接点近傍の温度を測定する冷接点温度検出サ
ーミスタ６ｄが冷接点そのものの温度変化に完全に追従
しきれていないことと、食品２の温度変化に対するＶ1
（Ｖ）の応答速度と冷接点近傍温度変動に対するＶ2
（Ｖ）の応答速度にずれがあるためである。However, in the above conventional configuration, the actual cold junction temperature in the thermopile element 6b and the linear junction circuit 6e from the cold junction temperature detection thermistor 6d are changed by the ambient temperature fluctuation in the vicinity of the surface temperature detecting means 6 or the like. There is a problem that an imbalance occurs between the output voltage V2 (V) and the surface temperature T1 (K) of the food 2 which is converted as a result. This is because the cold junction temperature detection thermistor 6d, which measures the temperature in the vicinity of the cold junction by conduction heat, cannot completely follow the temperature change of the cold junction itself, and V1 for the temperature change of food 2
(V) response speed and V2 for cold junction temperature fluctuations
This is because there is a deviation in the response speed of (V).
【００１０】また集光レンズ６ａに汚れや水滴などが付
着した場合や振動などによって光軸が若干ずれた場合
に、サーモパイル素子６ｂに入射する輻射熱エネルギー
が減少し測定誤差が出る。あるいは増幅回路６ｃ、直線
化回路６ｅの出力における温度ドリフト特性などにより
測定誤差が出るという課題もあった。言いかえると前記
（式３）におけるｋ1、ｋ2、ｋ3の各値が定数ではなく
応答遅れにより時間変動したり、温度によってずれてい
くということである。Further, when dirt or water drops adhere to the condenser lens 6a or when the optical axis is slightly displaced due to vibration or the like, the radiant heat energy incident on the thermopile element 6b is reduced and a measurement error occurs. Alternatively, there is a problem that a measurement error may occur due to temperature drift characteristics in the outputs of the amplifier circuit 6c and the linearization circuit 6e. In other words, the values of k1, k2, and k3 in (Equation 3) above are not constants but time-variable due to response delay, or shift due to temperature.
【００１１】本発明は上記課題を解決するもので、表面
温度検出手段６近傍の雰囲気温度が変動した場合や高温
となった場合あるいは劣化などにより出力が低下した場
合にも、その変化に対応して測温すべき食品２の温度を
簡単に精度よく測定し、出来映えにバラツキのない自動
調理ができる調理装置を提供することを目的としてい
る。The present invention solves the above-mentioned problems and responds to changes in the ambient temperature in the vicinity of the surface temperature detecting means 6 even when the ambient temperature changes or becomes high, or when the output decreases due to deterioration or the like. It is an object of the present invention to provide a cooking device that can easily and accurately measure the temperature of the food 2 to be measured and can perform automatic cooking without variations in the finished product.
【００１２】[0012]
【課題を解決するための手段】上記目的を達成するため
に本発明の調理装置は、食品を加熱する加熱手段と、こ
の食品の載置位置以外の所定位置の温度を測定する基準
温度検出手段と、食品あるいは所定位置から放射される
輻射熱を非接触で検出し熱電変換する赤外線検出手段
と、食品からの輻射熱による赤外線検出手段の出力、所
定位置からの輻射熱による赤外線検出手段の出力及び基
準温度検出手段の出力から食品温度を算出する食品温度
算出手段と、食品温度算出手段の出力に応じ加熱手段を
制御する制御手段とを備えたものである。To achieve the above object, the cooking apparatus of the present invention comprises a heating means for heating food and a reference temperature detecting means for measuring the temperature at a predetermined position other than the mounting position of the food. Infrared detecting means for non-contact detection of radiant heat radiated from food or a predetermined position and thermoelectric conversion, output of infrared detecting means by radiant heat from food, output of infrared detecting means by radiant heat from a predetermined position and reference temperature The food temperature calculation means calculates the food temperature from the output of the detection means, and the control means controls the heating means according to the output of the food temperature calculation means.
【００１３】また特に赤外線検出手段を駆動し、輻射熱
検出の方向を食品の方向かまたは所定位置の方向かに切
り替える切替手段を備えたものである。Further, it is particularly equipped with a switching means for driving the infrared detecting means to switch the direction of radiant heat detection to the direction of food or the direction of a predetermined position.
【００１４】あるいは食品から赤外線検出手段に放射さ
れる輻射熱を遮断する遮断手段と、遮断手段に設けた所
定位置の温度を測定する基準温度検出手段と、前記遮断
手段を駆動し、輻射熱検出対象を食品かまたは遮断手段
に設けた所定位置かに切り替える切替手段を備えたもの
である。Alternatively, a shielding means for shielding the radiant heat emitted from the food to the infrared detecting means, a reference temperature detecting means for measuring the temperature at a predetermined position provided on the shielding means, and the shielding means are driven to detect the radiant heat to be detected. It is provided with a switching means for switching between food and a predetermined position provided in the blocking means.
【００１５】さらに所定位置の温度を可変制御する基準
温度制御手段と、この基準温度制御手段によって制御さ
れた所定位置の温度に対する赤外線検出手段の出力から
食品温度算出手段の出力を補正する補正手段とを備えた
ものである。Further, reference temperature control means for variably controlling the temperature at the predetermined position, and correction means for correcting the output of the food temperature calculation means from the output of the infrared detection means for the temperature at the predetermined position controlled by the reference temperature control means. It is equipped with.
【００１６】[0016]
【作用】本発明は上記構成によって、基準温度検出手段
で正確に測定される所定位置の温度と所定位置から放射
される輻射熱を熱電変換した赤外線検出手段の出力を基
に食品から放射される輻射熱を熱電変換する赤外線検出
手段の出力から食品温度を正確に測定することになる。According to the present invention, the radiant heat radiated from food based on the temperature of the predetermined position accurately measured by the reference temperature detecting means and the output of the infrared detecting means thermoelectrically converting the radiant heat radiated from the predetermined position by the above-mentioned construction. The food temperature can be accurately measured from the output of the infrared detecting means for thermoelectrically converting.
【００１７】また特に１つの赤外線検出手段を駆動し、
輻射熱検出対象を食品または所定位置に切り替える切替
手段を備えることによって、（式４）における右辺第２
項、第３項と（式５）における右辺第２項、第３項とは
完全に一致するので厳密に（式６）が成立する。In particular, one infrared detecting means is driven,
By providing a switching means for switching the radiant heat detection target to food or a predetermined position, the second right side in (Equation 4)
Since the terms, the third term, and the second and third terms on the right side in (Equation 5) completely match, (Equation 6) is strictly established.
【００１８】あるいは食品から赤外線検出手段に放射さ
れる輻射熱を遮断する遮断手段と、遮断手段に設けた所
定位置の温度Ｔ0（Ｋ）を測定する基準温度検出手段
と、遮断手段を駆動し、輻射熱検出対象を食品または遮
断手段に切り替える切替手段を備えても同様に作用す
る。Alternatively, a shielding means for shielding the radiant heat emitted from the food to the infrared detecting means, a reference temperature detecting means for measuring the temperature T0 (K) at a predetermined position provided on the shielding means, and a shielding means for driving the radiant heat Even if the switching means for switching the detection target to the food or the blocking means is provided, the same operation is performed.
【００１９】さらに所定位置の温度Ｔ0（Ｋ）を可変制
御する基準温度制御手段とこの基準温度制御手段によっ
て制御された所定位置の温度Ｔ0（Ｋ）に対する赤外線
検出手段の出力から食品温度算出手段の出力を補正する
補正手段とを備えることによって、様々に可変された所
定位置の温度Ｔ0（Ｋ）とそれに対応する出力電圧Ｖ0
（Ｖ）との関係から、（式５）におけるＫaの値を測定
し食品２の温度算出式（式６）を自動校正することにな
る。Further, reference temperature control means for variably controlling the temperature T0 (K) at the predetermined position and output of the infrared detecting means for the temperature T0 (K) at the predetermined position controlled by the reference temperature control means are used to calculate the food temperature calculation means. By providing a correcting means for correcting the output, the temperature T0 (K) at the predetermined position which is variously changed and the output voltage V0 corresponding to the temperature T0 (K)
From the relationship with (V), the value of Ka in (Equation 5) is measured and the temperature calculation equation (Equation 6) of the food 2 is automatically calibrated.
【００２０】制御手段は食品温度検出手段で求めた正確
な食品温度に基づき、加熱手段に対し食品への加熱制御
量や加熱時間などを制御することで、出来映えにバラツ
キのない自動調理を実現する。The control means controls the heating control amount and the heating time of the food to the heating means based on the accurate food temperature obtained by the food temperature detecting means, thereby realizing automatic cooking without variations in the finished product. .
【００２１】[0021]
【実施例】以下、本発明の第１の実施例を図１、図２を
用いて説明する。尚、従来例と同じ構成のものは同一符
号をつける。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The same components as those in the conventional example are designated by the same reference numerals.
【００２２】図１に示すように、調理室１内に食品２や
皿３を載せるための調理台４があり、さらにこの食品２
を調理する加熱手段５、非接触で調理台４上に載せられ
た食品２あるいは機械室８内の所定位置９から放射され
る輻射熱を熱電変換する赤外線検出手段１０が設けられ
ている。所定位置９の表面は放射率を高くするため、黒
体塗装されている。またこの所定位置９の温度Ｔ0
（Ｋ）を常時検出する基準温度検出手段１１が接続され
ている。１２はこの赤外線検出手段１０を９０゜回転さ
せ、赤外線検出手段１０における輻射熱検出対象を食品
２または所定位置９に切り替える切替手段であり、モー
ター、プーリーを備えタイミングベルトを介して赤外線
検出手段１０に接続されている。As shown in FIG. 1, there is a cooking table 4 on which a food 2 and a plate 3 are placed in a cooking chamber 1.
There is provided heating means 5 for cooking the food, and infrared detection means 10 for thermoelectrically converting the radiant heat radiated from the predetermined position 9 in the machine room 8 or the food 2 placed on the cooking table 4 in a non-contact manner. The surface of the predetermined position 9 is coated with a black body to increase the emissivity. Further, the temperature T0 at the predetermined position 9
A reference temperature detecting means 11 for constantly detecting (K) is connected. Reference numeral 12 is a switching means for rotating the infrared detecting means 10 by 90 ° so as to switch the radiant heat detection target in the infrared detecting means 10 to the food 2 or the predetermined position 9, and the infrared detecting means 10 is provided with a motor and a pulley via a timing belt. It is connected.
【００２３】赤外線検出手段１０の構成を図２に示す。
１０ａは輻射熱検出対象から放射される輻射熱（赤外
線）を効率よく集光するもので赤外線を透過させる材質
（例えばシリコン）からなる集光レンズである。１０ｂ
は集光レンズ１０ａで集められた輻射熱検出対象からの
輻射熱を非接触で検出し熱電変換するサーモパイル素子
で、１０ｃはこのサーモパイル素子１０ｂの出力信号を
例えば１０００倍に増幅する増幅回路である。サーモパ
イル素子１０ｂはビスマス−アンチモンといった異種金
属材料を数十対から数百対にわたり接合した熱電対を備
えている。接合部の温接点は光軸の中心付近に配置さ
れ、食品など輻射熱検出対象からの輻射熱だけを受けや
すくするよう金黒と呼ばれる吸熱材を塗布している。一
方接合部の冷接点はヒートシンクを介し熱伝導率の高い
外側の金属缶に熱結合し出来るだけ温度変動しないよう
に構成されている。いま輻射熱検出対象から集光レンズ
１０ａを介してサーモパイル素子１０ｂに対し輻射熱エ
ネルギーが入射した場合、温接点は冷接点に比べわずか
に温度上昇を生じる。サーモパイル素子１０ｂはこの温
接点と冷接点との間に発生した温度差をゼーベック効果
を用いて起電力（例えば１０μＶ／℃）に変換するもの
である。増幅回路１０ｃはサーモパイル素子からの出力
電圧を例えば１０００倍に増幅し電圧を出力する。The structure of the infrared detecting means 10 is shown in FIG.
Reference numeral 10a is a condenser lens that efficiently collects radiant heat (infrared rays) emitted from the radiant heat detection target and is made of a material (for example, silicon) that transmits infrared rays. 10b
Is a thermopile element for non-contact detection and thermoelectric conversion of radiant heat from the radiant heat detection target collected by the condenser lens 10a, and 10c is an amplifier circuit for amplifying the output signal of the thermopile element 10b by 1000 times, for example. The thermopile element 10b includes a thermocouple in which tens to hundreds of different metal materials such as bismuth-antimony are joined. The hot junction at the junction is located near the center of the optical axis, and is coated with a heat absorbing material called gold black so that it can easily receive only the radiant heat from the radiant heat detection target such as food. On the other hand, the cold junction at the joint is configured to be thermally coupled to the outer metal can having a high thermal conductivity via a heat sink so that the temperature does not fluctuate as much as possible. When radiant heat energy is incident on the thermopile element 10b from the radiant heat detection target through the condenser lens 10a, the temperature of the hot junction slightly rises as compared with that of the cold junction. The thermopile element 10b converts the temperature difference generated between the hot junction and the cold junction into an electromotive force (for example, 10 μV / ° C.) using the Seebeck effect. The amplifier circuit 10c amplifies the output voltage from the thermopile element by 1000 times and outputs the voltage.
【００２４】ここで Ｔ1（Ｋ）：食品温度（未知） Ｔ2（Ｋ）：冷接点近傍温度（未知） Ｔ0（Ｋ）：所定位置の温度（既知） Ｖ1（Ｖ）：食品からの輻射熱による赤外線検出手段の
出力電圧（既知） Ｖ0（Ｖ）：所定位置からの輻射熱による赤外線検出手
段の出力電圧（既知） Ｖ0＝Ｋa＊Ｔ0＋Ｋb＊Ｔ2＋Ｋc・・・・・・・・・・・・・（式５） として（式３）の一次式に準じると、Ｖ1（Ｖ）及びＶ0
（Ｖ）は Ｖ1＝（1／ｋ1＊Ｔ1）−（ｋ2／ｋ1）＊Ｔ2−ｋ3／ｋ1 ・・・・・・（式４ ） Ｖ0＝（1／ｋ1＊Ｔ0）−（ｋ2／ｋ1）＊Ｔ2−ｋ3／ｋ1 ・・・・・・（式５ ） と表せるので、（式４）及び（式５）から Ｔ1＝（Ｖ1−Ｖ0）＊ｋ1＋Ｔ0 ・・・・・・・・・・・・・（式６） となる。つまり冷接点近傍温度を測定しなくても、非接
触で食品温度を正確に測定できることになる。また冷接
点近傍温度が変動しても測定温度精度に悪影響を及ぼさ
ない。これは（式３）の１次式でなく（式１）の４次式
から導いても同様である。Here, T1 (K): food temperature (unknown) T2 (K): cold junction vicinity temperature (unknown) T0 (K): temperature at a predetermined position (known) V1 (V): infrared rays due to radiant heat from food Output voltage of detection means (known) V0 (V): Output voltage of infrared detection means due to radiant heat from a predetermined position (known) V0 = Ka * T0 + Kb * T2 + Kc ... (Equation) According to the linear equation of (Equation 3) as 5), V1 (V) and V0
(V) is V1 = (1 / k1 * T1)-(k2 / k1) * T2-k3 / k1 (Equation 4) V0 = (1 / k1 * T0)-(k2 / k1) * T2-k3 / k1 ··· (Equation 5) From (Equation 4) and (Equation 5), T1 = (V1−V0) * k1 + T0 .. (Equation 6) That is, the food temperature can be accurately measured in a non-contact manner without measuring the temperature near the cold junction. Even if the temperature near the cold junction fluctuates, the accuracy of the measured temperature is not adversely affected. This is the same even if it is derived from the quaternary equation of (Equation 1) instead of the linear equation of (Equation 3).
【００２５】食品温度算出手段１３は赤外線検出手段１
０及び基準温度検出手段１１に接続され、加熱手段５に
よる食品２の加熱時食品２から放射される輻射熱を熱電
変換した赤外線検出手段１０の出力電圧をＶ1（Ｖ）、
所定位置９から放射される輻射熱を熱電変換した赤外線
検出手段１０の出力電圧をＶ0（Ｖ）、基準温度検出手
段１１の出力を温度換算したものをＴ0（Ｋ）とする
と、前記（式６）により食品２の表面温度を算出し、常
時算出したこの食品２温度Ｔ0（Ｋ）を制御手段１４に
伝える。The food temperature calculating means 13 is an infrared detecting means 1
0 and the reference temperature detecting means 11 and the output voltage of the infrared detecting means 10 which is thermoelectrically converted from the radiant heat radiated from the food 2 when the food 2 is heated by the heating means 5 is V1 (V),
Letting V0 (V) be the output voltage of the infrared detecting means 10 that thermoelectrically converts the radiant heat radiated from the predetermined position 9 and T0 (K) be the temperature conversion of the output of the reference temperature detecting means 11, the above (Equation 6). The surface temperature of the food 2 is calculated in accordance with, and the calculated food 2 temperature T0 (K) is transmitted to the control means 14 at all times.
【００２６】制御手段１４は食品温度検出手段１３で求
めた正確な食品２温度に基づき、加熱手段５に対し食品
２への加熱制御量や加熱時間などを制御し、また食品２
温度Ｔ0（Ｋ）の値が所定温度に達した場合加熱手段５
による食品２への加熱を停止する。The control means 14 controls the heating control amount of the food 2 and the heating time to the heating means 5 based on the accurate food 2 temperature obtained by the food temperature detecting means 13, and the food 2
When the value of the temperature T0 (K) reaches a predetermined temperature, the heating means 5
The heating of the food 2 due to is stopped.
【００２７】ところで、切替手段１２によって輻射熱検
出対象を食品２へ向けるか所定位置９へ向けるかを切り
替える方法は加熱手段５による食品２の加熱中交互に切
り替えてもよいし、加熱前には輻射熱検出の方向を所定
位置９に加熱中には食品２に固定しておいてもよい。ま
た切替手段１２による赤外線検出手段１０の駆動方式は
回転でなく直線移動でも構わない。By the way, as a method of switching whether the radiant heat detection target is directed to the food 2 or to the predetermined position 9 by the switching means 12, the heating means 5 may be alternately switched during heating of the food 2, or radiant heat may be applied before heating. The direction of detection may be fixed to the food 2 during heating to the predetermined position 9. Further, the driving method of the infrared detecting means 10 by the switching means 12 may be linear movement instead of rotation.
【００２８】上記構成おいて、基準温度検出手段１１で
正確に測定される所定位置９の温度Ｔ0（Ｋ）と食品２
及び所定位置９から放射される輻射熱を熱電変換した赤
外線検出手段１０の出力電圧Ｖ1（Ｖ）、Ｖ0（Ｖ）を基
に食品２温度Ｔ1（Ｋ）を正確に測定することになる。
実際の赤外線検出手段１０近傍の雰囲気温度が変動した
場合や高温となった場合あるいは劣化などにより出力が
低下した場合にも、その変化に対応して測温すべき食品
２の温度を簡単に精度よく測定し、出来映えにバラツキ
のない自動調理ができる効果がある。In the above structure, the temperature T0 (K) at the predetermined position 9 accurately measured by the reference temperature detecting means 11 and the food 2
Also, the temperature T1 (K) of the food 2 is accurately measured based on the output voltages V1 (V) and V0 (V) of the infrared detecting means 10 that thermoelectrically converts the radiant heat radiated from the predetermined position 9.
Even if the actual ambient temperature near the infrared detecting means 10 fluctuates, becomes high, or the output decreases due to deterioration, the temperature of the food 2 to be measured can be accurately measured according to the change. It has the effect that it can be automatically measured with good measurement and no variations in the quality of the work.
【００２９】次に本発明の第２の実施例を図３を用いて
説明する。尚、第１の実施例と同じ構成のものは同一符
号をつける。第１の実施例で示した構成と異なる点は食
品２から赤外線検出手段１０に放射される輻射熱を遮断
する遮断手段１５と、遮断手段１５の温度を測定する基
準温度検出手段１１と、遮断手段１５を調理室１の天井
面と並行に直線駆動し、輻射熱検出対象を食品２または
遮断手段１５に切り替える切替手段１６を備えたことに
ある。切替手段１６によって調理室１の天井面の開口部
が開放または遮断される。つまり赤外線検出手段１０そ
のものを駆動するのではなく、切替手段１６が遮断手段
１５を駆動することによって輻射熱検出対象を食品２と
遮断手段１５に切り替える構成である。ここで遮断手段
１５の表面は放射率を高くするため、黒体塗装されてい
る。またこの遮断手段１５の温度Ｔ0（Ｋ）を常時検出
する基準温度検出手段１１が接続されている。赤外線検
出手段１０の構成は第１の実施例において図２に示した
ものと同様である。Next, a second embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals. The difference from the configuration shown in the first embodiment is that the blocking means 15 for blocking the radiant heat emitted from the food 2 to the infrared detecting means 10, the reference temperature detecting means 11 for measuring the temperature of the blocking means 15, and the blocking means. There is a switching means 16 for linearly driving 15 in parallel with the ceiling surface of the cooking chamber 1 and switching the radiant heat detection target to the food 2 or the blocking means 15. The switching means 16 opens or closes the opening on the ceiling surface of the cooking chamber 1. That is, the infrared radiation detecting means 10 itself is not driven, but the switching means 16 drives the blocking means 15 to switch the radiant heat detection target between the food 2 and the blocking means 15. Here, the surface of the blocking means 15 is coated with a black body in order to increase the emissivity. Further, a reference temperature detecting means 11 for constantly detecting the temperature T0 (K) of the breaking means 15 is connected. The configuration of the infrared detecting means 10 is the same as that shown in FIG. 2 in the first embodiment.
【００３０】食品温度算出手段１３は前記第１の実施例
同様、赤外線検出手段１０及び基準温度検出手段１１に
接続され、加熱手段５による食品２の加熱時食品２から
放射される輻射熱を熱電変換した赤外線検出手段１０の
出力電圧をＶ1（Ｖ）、遮断手段１５から放射される輻
射熱を熱電変換した赤外線検出手段１０の出力電圧をＶ
0（Ｖ）基準温度検出手段１１の出力を温度換算したも
のをＴ0（Ｋ）とすると、前記（式６）により食品２の
表面温度を算出し、常時算出したこの食品２温度Ｔ0
（Ｋ）を制御手段１４に伝える。As in the first embodiment, the food temperature calculating means 13 is connected to the infrared detecting means 10 and the reference temperature detecting means 11, and the radiant heat radiated from the food 2 when the food 2 is heated by the heating means 5 is thermoelectrically converted. The output voltage of the infrared detecting means 10 is V1 (V), and the output voltage of the infrared detecting means 10 obtained by thermoelectric conversion of the radiant heat radiated from the breaking means 15 is V
Assuming that the output of the 0 (V) reference temperature detecting means 11 is temperature-converted to be T0 (K), the surface temperature of the food 2 is calculated by the above (formula 6), and this food 2 temperature T0 calculated at all times is calculated.
(K) is transmitted to the control means 14.
【００３１】制御手段１４は食品温度検出手段１３で求
めた正確な食品２温度に基づき、加熱手段５に対し食品
２への加熱制御量や加熱時間などを制御し、また食品２
温度Ｔ0（Ｋ）の値が所定温度に達した場合加熱手段５
による食品２への加熱を停止する。The control means 14 controls the heating control amount of the food 2 and the heating time to the heating means 5 on the basis of the accurate temperature of the food 2 obtained by the food temperature detecting means 13.
When the value of the temperature T0 (K) reaches a predetermined temperature, the heating means 5
The heating of the food 2 due to is stopped.
【００３２】ところで、赤外線検出手段１０をサーモパ
イルによって構成するのでなく、焦電型素子を用い、遮
断手段１５をこの赤外線検出手段１０のチョッパとして
併用してもよい。By the way, the infrared detecting means 10 may not be constructed of a thermopile, but a pyroelectric element may be used and the blocking means 15 may be used as a chopper of the infrared detecting means 10.
【００３３】上記構成おいて、基準温度検出手段１１で
正確に測定される遮断手段１５の温度Ｔ0（Ｋ）と食品
２及び遮断手段１５から放射される輻射熱を熱電変換し
た赤外線検出手段１０の出力電圧Ｖ1（Ｖ）、Ｖ0（Ｖ）
を基に食品２温度Ｔ1（Ｋ）を正確に測定することにな
る。実際の赤外線検出手段１０近傍の雰囲気温度が変動
した場合や高温となった場合あるいは劣化などにより出
力が低下した場合にも、その変化に対応して測温すべき
食品２の温度を簡単に精度よく測定し、出来映えにバラ
ツキのない自動調理ができる効果がある。特に赤外線検
出手段１０そのものを駆動しなくてよいので駆動に伴う
振動によって赤外線検出手段１０の出力にノイズが重畳
することがない。また赤外線検出手段１０近傍の雰囲気
温度が駆動によって変動することもないのでより安定し
た状態で測定でき、測定精度が向上する。In the above structure, the temperature T0 (K) of the interruption means 15 accurately measured by the reference temperature detection means 11 and the output of the infrared detection means 10 which thermoelectrically converts the radiant heat radiated from the food 2 and the interruption means 15. Voltage V1 (V), V0 (V)
Based on the above, the food 2 temperature T1 (K) will be accurately measured. Even if the actual ambient temperature near the infrared detecting means 10 fluctuates, becomes high, or the output decreases due to deterioration, the temperature of the food 2 to be measured can be accurately measured according to the change. It has the effect that it can be automatically measured with good measurement and no variations in the quality of the work. In particular, since it is not necessary to drive the infrared detecting means 10 itself, noise is not superimposed on the output of the infrared detecting means 10 due to the vibration accompanying the driving. Further, since the ambient temperature in the vicinity of the infrared detecting means 10 does not change due to driving, the measurement can be performed in a more stable state, and the measurement accuracy is improved.
【００３４】次に本発明の第３の実施例を図４、図５を
用いて説明する。尚、第２の実施例と同じ構成のものは
同一符号をつける。第２の実施例で示した構成と異なる
点は遮断手段１５の温度を可変制御する基準温度制御手
段１７と、この基準温度制御手段１６によって制御され
た遮断手段１５の温度に対する赤外線検出手段１０の出
力から食品温度算出手段１３の出力を補正する補正手段
１８を備えたことにある。ここで赤外線検出手段１０の
冷接点近傍温度Ｔ2（Ｋ）がほぼ一定で、遮断手段１５
の温度をＴ0（Ｋ）、遮断手段１５からの輻射熱による
赤外線検出手段１０の出力電圧をＶ0（Ｖ）とすると
（式５）から Ｖ0＝（1／ｋ1）＊Ｔ0−ｋ3／ｋ1・・・・・・・・・・・・（式７） と出来る。Ｖ0（Ｖ）は赤外線検出手段１０からの出力
電圧であり、Ｔ0（Ｋ）は基準温度検出手段１１からの
温度換算出力値である。加熱手段５による食品２への非
加熱時には切替手段１６によって赤外線検出手段１０の
輻射熱検出対象を遮断手段１５に切り替えておき、また
基準温度制御手段１７によって遮断手段１５の温度を任
意に変更することで補正手段１８には（式７）における
複数のＶ0とＴ0のデータ組が収集できる。補正手段１８
は収集された複数のＶ0とＴ0のデータ組を例えば最小二
乗法で直線回帰することによりあらかじめ定数ｋ1、ｋ3
を算出し食品温度算出手段１３に伝える。Next, a third embodiment of the present invention will be described with reference to FIGS. The same components as those in the second embodiment are designated by the same reference numerals. The difference from the configuration shown in the second embodiment is that the reference temperature control means 17 variably controls the temperature of the shutoff means 15 and the infrared detection means 10 for the temperature of the shutoff means 15 controlled by the reference temperature control means 16. It is provided with the correction means 18 for correcting the output of the food temperature calculation means 13 from the output. Here, the temperature T2 (K) near the cold junction of the infrared detecting means 10 is substantially constant, and the shutoff means 15
When the output voltage of the infrared detecting means 10 due to the radiant heat from the breaking means 15 is V0 (V), the temperature of the above is V0 (V) = V0 = (1 / k1) * T0-k3 / k1 ...・ ・ ・ ・ ・ ・ ・ (Equation 7) V0 (V) is an output voltage from the infrared detecting means 10, and T0 (K) is a temperature conversion output value from the reference temperature detecting means 11. When the heating means 5 does not heat the food 2, the radiant heat detection target of the infrared detecting means 10 is switched to the blocking means 15 by the switching means 16, and the temperature of the blocking means 15 is arbitrarily changed by the reference temperature control means 17. Thus, the correction means 18 can collect a plurality of V0 and T0 data sets in (Equation 7). Correction means 18
Is a constant k1, k3 in advance obtained by linear regression of the collected data sets of V0 and T0, for example, by the method of least squares.
Is calculated and transmitted to the food temperature calculation means 13.
【００３５】食品温度算出手段１３は前記第１の実施例
同様、赤外線検出手段１０及び基準温度検出手段１１に
も接続され、加熱手段５による食品２の加熱時食品２か
ら放射される輻射熱を熱電変換した赤外線検出手段１０
の出力電圧をＶ1（Ｖ）、遮断手段１５から放射される
輻射熱を熱電変換した赤外線検出手段１０の出力電圧を
Ｖ0（Ｖ）基準温度検出手段１１の出力を温度換算した
ものをＴ0（Ｋ）とすると、前記（式６）により食品２
の表面温度を算出し、常時算出したこの食品２温度Ｔ0
（Ｋ）を制御手段１４に伝える。The food temperature calculating means 13 is also connected to the infrared detecting means 10 and the reference temperature detecting means 11 as in the first embodiment, and the radiant heat emitted from the food 2 when the food 2 is heated by the heating means 5 is thermoelectrically converted. Converted infrared detecting means 10
Output voltage of V1 (V), the output voltage of the infrared detecting means 10 that thermoelectrically converts the radiant heat radiated from the breaking means 15 is V0 (V), and the output of the reference temperature detecting means 11 is temperature converted to T0 (K). Then, according to the above (formula 6), the food 2
Calculated the surface temperature of the
(K) is transmitted to the control means 14.
【００３６】制御手段１４は食品温度検出手段１３で求
めた正確な食品２温度に基づき、加熱手段５に対し食品
２への加熱制御量や加熱時間などを制御し、また食品２
温度Ｔ0（Ｋ）の値が所定温度に達した場合加熱手段５
による食品２への加熱を停止する。図５に示すように食
品２への加熱時と非加熱時では前記した２つ動作モード
を有し、これを繰り返す構成であり、非加熱モードで算
出される値Ｋaはその都度更新する。非加熱モードでは
切替手段１６によって調理室１天井面の開口部が遮断さ
れているので、機械室８全体あるいは赤外線検出手段１
０近傍の雰囲気温度の変動も少なく、（式７）は成立す
る。The control means 14 controls the heating control amount of the food 2 and the heating time to the heating means 5 on the basis of the accurate temperature of the food 2 obtained by the food temperature detecting means 13.
When the value of the temperature T0 (K) reaches a predetermined temperature, the heating means 5
The heating of the food 2 due to is stopped. As shown in FIG. 5, when the food 2 is heated and when it is not heated, it has the above-described two operation modes, which are repeated, and the value Ka calculated in the non-heated mode is updated each time. In the non-heating mode, since the opening on the ceiling surface of the cooking chamber 1 is blocked by the switching means 16, the entire machine room 8 or the infrared detecting means 1
There is little fluctuation in the ambient temperature near 0, and (Equation 7) holds.
【００３７】上記構成において遮断手段１５の温度Ｔ0
（Ｋ）を可変制御する基準温度制御手段１７とこの基準
温度制御手段１７によって制御された遮断手段１５の温
度Ｔ0（Ｋ）に対する赤外線検出手段１０の出力から食
品温度算出手段の出力を補正する補正手段１８とを備え
ることによって、様々に可変された遮断手段１５の温度
Ｔ0（Ｋ）とそれに対応する出力電圧Ｖ0（Ｖ）との関係
から、（式５）におけるＫaの値を測定し食品２の温度
算出式（式６）を自動校正することになる。In the above structure, the temperature T0 of the shutoff means 15
A correction for correcting the output of the food temperature calculation means from the output of the infrared detection means 10 with respect to the temperature T0 (K) of the reference temperature control means 17 for variably controlling (K) and the shutoff means 15 controlled by the reference temperature control means 17. By including the means 18, the value of Ka in (Equation 5) is measured from the relationship between the temperature T0 (K) of the breaking means 15 and the corresponding output voltage V0 (V), which are variously changed, to measure the food 2 The temperature calculation formula (formula 6) is automatically calibrated.
【００３８】よって赤外線検出手段１０中の集光レンズ
６ａに汚れや水滴などが付着した場合や振動などによっ
て光軸が若干ずれた場合に、サーモパイル素子６ｂに入
射する輻射熱エネルギーが減少したり、増幅回路６ｃ、
直線化回路６ｅの出力における温度ドリフトがあるが、
それらの変化に対応して測温すべき食品２の温度を簡単
に精度よく測定し、出来映えにバラツキのない自動調理
ができる効果がある。Therefore, when dirt or water droplets are attached to the condenser lens 6a in the infrared detecting means 10 or when the optical axis is slightly displaced due to vibration or the like, the radiant heat energy incident on the thermopile element 6b is reduced or amplified. Circuit 6c,
Although there is a temperature drift in the output of the linearization circuit 6e,
There is an effect that the temperature of the food 2 to be temperature-measured can be easily and accurately measured in response to these changes, and automatic cooking can be performed without variations in the finished product.
【００３９】ところで、補正手段１８における食品温度
換算式の算出式は（式７）のような１次式でなくてもよ
い。赤外線検出手段１０の構成はサーモパイルに限るも
のではない。By the way, the calculation formula of the food temperature conversion formula in the correction means 18 does not have to be a linear formula such as (Formula 7). The configuration of the infrared detecting means 10 is not limited to the thermopile.
【００４０】[0040]
【発明の効果】以上説明したように本発明によれば、次
の効果がある。As described above, the present invention has the following effects.
【００４１】（１）赤外線検出手段近傍の雰囲気温度が
変動した場合や高温となった場合あるいは劣化などによ
り出力が低下した場合にも、その変化に対応して測温す
べき食品の温度を簡単に精度よく測定し、出来映えにバ
ラツキのない自動調理ができる。(1) Even if the ambient temperature near the infrared detecting means fluctuates, becomes high, or the output drops due to deterioration, etc., the temperature of the food to be measured can be simply adjusted according to the change. It is possible to perform automatic cooking without any variation in the result by accurately measuring.
【００４２】（２）特に１つの赤外線検出手段を駆動し
輻射熱検出の方向を食品または所定位置に切り替える切
替手段を備えることによって、測定精度が向上する。(2) Especially, by providing one infrared detecting means and switching means for switching the radiant heat detection direction to food or a predetermined position, the measurement accuracy is improved.
【００４３】（３）あるいは遮断手段を駆動し輻射熱検
出の方向を食品または遮断手段に切り替える切替手段を
備えた場合、駆動に伴う振動によって赤外線検出手段の
出力にノイズが重畳することがない。また赤外線検出手
段近傍の雰囲気温度が駆動によって変動することもない
のでより安定した状態で測定でき、測定精度が向上す
る。(3) Alternatively, when the switching means is driven and the switching means for switching the radiant heat detection direction to the food or the blocking means is provided, noise is not superposed on the output of the infrared detecting means due to the vibration accompanying the driving. Further, since the ambient temperature in the vicinity of the infrared detecting means does not fluctuate due to driving, the measurement can be performed in a more stable state and the measurement accuracy is improved.
【００４４】（４）様々に可変された所定位置の温度と
それに対応する出力電圧との関係から、食品の温度算出
式を自動校正することになり、経年劣化もなくなる。(4) The temperature calculation formula of food is automatically calibrated from the relationship between the temperature at various predetermined positions and the output voltage corresponding thereto, and the deterioration over time is eliminated.
【図１】本発明の第１の実施例における調理装置の構成
を示すブロック図FIG. 1 is a block diagram showing a configuration of a cooking apparatus according to a first embodiment of the present invention.
【図２】同実施例における赤外線検出手段の構成を示す
図FIG. 2 is a diagram showing a configuration of infrared detecting means in the embodiment.
【図３】本発明の第２の実施例における調理装置の構成
を示すブロック図FIG. 3 is a block diagram showing a configuration of a cooking apparatus according to a second embodiment of the present invention.
【図４】本発明の第３の実施例における調理装置の構成
を示すブロック図FIG. 4 is a block diagram showing a configuration of a cooking apparatus according to a third embodiment of the present invention.
【図５】同実施例における調理装置の２種類の動作を説
明するブロック図FIG. 5 is a block diagram illustrating two types of operations of the cooking apparatus according to the embodiment.
【図６】従来の調理装置の構成を示すブロック図FIG. 6 is a block diagram showing a configuration of a conventional cooking device.
【図７】同実施例における表面温度検出手段の構成を示
す図FIG. 7 is a diagram showing a configuration of surface temperature detecting means in the embodiment.
２ 食品 ５ 加熱手段 １０ 赤外線検出手段 １１ 基準温度検出手段 １２ 切替手段 １３ 食品温度算出手段 １４ 制御手段 １５ 遮断手段 １８ 補正手段 2 food 5 heating means 10 infrared detection means 11 reference temperature detection means 12 switching means 13 food temperature calculation means 14 control means 15 shut-off means 18 correction means
Claims (4)
置位置以外の所定位置の温度を測定する基準温度検出手
段と、前記食品あるいは前記所定位置から放射される輻
射熱を非接触で検出し熱電変換する赤外線検出手段と、
前記食品からの輻射熱による前記赤外線検出手段の出力
と、前記所定位置からの輻射熱による前記赤外線検出手
段の出力及び前記基準温度検出手段の出力から前記食品
温度を算出する食品温度算出手段と、前記食品温度算出
手段の出力に応じ前記加熱手段を制御する制御手段とを
備えた調理装置。1. A heating means for heating food, a reference temperature detecting means for measuring the temperature of a predetermined position other than the placement position of the food, and radiant heat radiated from the food or the predetermined position is detected in a non-contact manner. Infrared detecting means for thermoelectric conversion,
The output of the infrared detecting means by the radiant heat from the food, the food temperature calculating means for calculating the food temperature from the output of the infrared detecting means by the radiant heat from the predetermined position and the output of the reference temperature detecting means, the food A cooking device comprising: a control unit that controls the heating unit according to the output of the temperature calculation unit.
の方向を前記食品の方向かまたは前記所定位置の方向か
に切り替える切替手段を備えた請求項１記載の調理装
置。2. The cooking apparatus according to claim 1, further comprising a switching unit that drives the infrared detection unit and switches a radiant heat detection direction to the food item direction or the predetermined position direction.
輻射熱を遮断する遮断手段と、前記遮断手段を駆動し、
輻射熱検出対象を前記食品かまたは前記遮断手段に設け
た所定位置かに切り替える切替手段とを備えた請求項１
記載の調理装置。3. A blocking means for blocking radiant heat emitted from the food to the infrared detecting means, and driving the blocking means,
2. A switching means for switching the radiant heat detection target to the food or a predetermined position provided on the blocking means.
The cooking device described.
度制御手段と、前記基準温度制御手段によって制御され
た前記所定位置の温度に対する前記赤外線検出手段の出
力から前記食品温度算出手段の出力を補正する補正手段
とを備えた請求項１記載の調理装置。4. A reference temperature control means for variably controlling the temperature of the predetermined position, and an output of the food temperature calculation means from the output of the infrared detection means with respect to the temperature of the predetermined position controlled by the reference temperature control means. The cooking apparatus according to claim 1, further comprising a correction unit that corrects the correction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23968893A JP3491302B2 (en) | 1993-09-27 | 1993-09-27 | Cooking equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23968893A JP3491302B2 (en) | 1993-09-27 | 1993-09-27 | Cooking equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0791669A true JPH0791669A (en) | 1995-04-04 |
| JP3491302B2 JP3491302B2 (en) | 2004-01-26 |
Family
ID=17048439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23968893A Expired - Fee Related JP3491302B2 (en) | 1993-09-27 | 1993-09-27 | Cooking equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3491302B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03274295A (en) * | 1990-08-01 | 1991-12-05 | Nippon Steel Corp | Rustproof steel sheet having superior corrosion resistance |
| JPH10132288A (en) * | 1996-10-25 | 1998-05-22 | Matsushita Electric Ind Co Ltd | Heater |
| JP2008258181A (en) * | 2008-07-31 | 2008-10-23 | Matsushita Electric Ind Co Ltd | Induction heating cooker |
| JP2010251332A (en) * | 2010-06-16 | 2010-11-04 | Hitachi Appliances Inc | Induction cooking device |
-
1993
- 1993-09-27 JP JP23968893A patent/JP3491302B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03274295A (en) * | 1990-08-01 | 1991-12-05 | Nippon Steel Corp | Rustproof steel sheet having superior corrosion resistance |
| JPH10132288A (en) * | 1996-10-25 | 1998-05-22 | Matsushita Electric Ind Co Ltd | Heater |
| JP2008258181A (en) * | 2008-07-31 | 2008-10-23 | Matsushita Electric Ind Co Ltd | Induction heating cooker |
| JP4535177B2 (en) * | 2008-07-31 | 2010-09-01 | パナソニック株式会社 | Induction heating cooker |
| JP2010251332A (en) * | 2010-06-16 | 2010-11-04 | Hitachi Appliances Inc | Induction cooking device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3491302B2 (en) | 2004-01-26 |
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