JPS6032288A - Heating cooking device - Google Patents

Heating cooking device

Info

Publication number
JPS6032288A
JPS6032288A JP14094283A JP14094283A JPS6032288A JP S6032288 A JPS6032288 A JP S6032288A JP 14094283 A JP14094283 A JP 14094283A JP 14094283 A JP14094283 A JP 14094283A JP S6032288 A JPS6032288 A JP S6032288A
Authority
JP
Japan
Prior art keywords
heating
absolute humidity
detection signal
ambient temperature
humidity detection
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
Application number
JP14094283A
Other languages
Japanese (ja)
Other versions
JPH0312435B2 (en
Inventor
安田 隆俊
田辺 武士
藤川 国義
竹岡 伸夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP14094283A priority Critical patent/JPS6032288A/en
Publication of JPS6032288A publication Critical patent/JPS6032288A/en
Publication of JPH0312435B2 publication Critical patent/JPH0312435B2/ja
Granted legal-status Critical Current

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  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Electric Ovens (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 く技術分野〉 本発明は、食品などの被加熱体が加熱されるにともない
発生する水蒸気と、この加熱時に上昇する雰囲気温度と
を検知し、これら2つの検知信号により被加熱体の仕上
り時間制御を行う加熱調理装置に関する。
[Detailed Description of the Invention] Technical Field> The present invention detects the water vapor generated as a heated object such as food is heated, and the atmospheric temperature that rises during this heating, and uses these two detection signals to detect the The present invention relates to a cooking device that controls the finishing time of an object to be heated.

〈従来技術〉 従来の加熱調理装置、たとえば電子レンジにおいては、
絶対湿度センサ等をオーブンの排気口付近に設定し、被
加熱体が加熱されることにより発生する水蒸気をこの絶
対湿度センサで検知して被加熱体の加熱時間を制御する
ようにしたものがある。この絶対湿度センサは、第1図
に示すように、大気中に露出された開放型のサーミスタ
R1と、乾燥した空気中に封じ込められた密閉型のサー
ミスタ馬と、2つの抵抗R,,R4とで構成されたブリ
ッジ回路aを有する。このブリッジ回路aの各中点A、
B間の電圧VBを増幅器すで増幅し、絶対湿度検出信号
VAHを得る。この絶対湿度検出信号VAHは被加熱体
の加熱時間Uの経過に伴なって第2図のように変化する
。このとき、絶対湿度検出信号VAHに対し基準レベル
VAHOを予じめ決めておくことにより加熱開始からの
絶対湿度検出信号VA)lのレベルが上記基桑レベルV
AI40に到達するまでの加熱時間u1を制御すること
ができることになる。
<Prior art> In a conventional heating cooking device, for example, a microwave oven,
Some ovens have an absolute humidity sensor, etc. set near the exhaust port of the oven, and the absolute humidity sensor detects the water vapor generated when the object to be heated is heated to control the heating time of the object to be heated. . As shown in Figure 1, this absolute humidity sensor consists of an open thermistor R1 exposed to the atmosphere, a closed thermistor sealed in dry air, and two resistors R, , R4. It has a bridge circuit a composed of. Each midpoint A of this bridge circuit a,
The voltage VB between B and B is amplified by an amplifier to obtain an absolute humidity detection signal VAH. This absolute humidity detection signal VAH changes as shown in FIG. 2 as the heating time U of the heated object passes. At this time, by predetermining a reference level VAHO for the absolute humidity detection signal VAH, the level of the absolute humidity detection signal VA)l from the start of heating is set to the reference level V
This means that the heating time u1 until AI40 is reached can be controlled.

ところが、このような従来例のものでは、加熱時間が長
時間になる場合や、庫内のヒータ等による被加熱体の高
温調理後のマイクロ波加熱等の場合では絶対湿度センサ
の雰囲気温度が著しく変化17ていることかある。とこ
ろが、第1図に示すようにブリッジ回路aには電流制限
抵抗R?を介して直流電源Eが接続されている。このた
め雰囲気温度が例えば高温になって両サーミスタR,,
R2の抵抗値が低下したときには、電流制限抵抗Rθの
抵抗値と両サーミスタR,,R2の抵抗値との比が大き
く変化する。この結果、ブリッジ回路aへの電圧VEが
低下する。雰囲気温度が低下してくるとこの電圧VEは
再び上昇する。このような電圧VEの変動は、そのまま
ブリッジ回路aの各中点A、B間の電圧V9の変動とし
てあられれ、更に絶対湿度検出信号VAHの変動となる
。このようにして、従来例のものでは、雰囲気温度の変
化により絶対湿度検出信号VAHが変化し、基準レベル
vAHo、!l:の間で加熱時間を正確に設定・制御す
ることが困離になる。これを解決するために雰囲気温度
センサを設け、この雰囲気温度センサの検出信号を用い
てもよいが、別途に高価な雰囲気温度センサが必要にな
ること、またとのセンサの設置スペースや、センサとの
間の複雑な電気結線が必要になる等の難点がある。
However, with such conventional devices, when the heating time is long, or when the object to be heated is heated by microwaves after being heated at high temperature by a heater in the refrigerator, etc., the ambient temperature of the absolute humidity sensor becomes extremely high. There are 17 changes. However, as shown in FIG. 1, the bridge circuit a has a current limiting resistor R? A DC power supply E is connected via the . For this reason, the ambient temperature becomes high, for example, and both thermistors R, ,
When the resistance value of R2 decreases, the ratio between the resistance value of the current limiting resistor Rθ and the resistance value of both thermistors R, , R2 changes greatly. As a result, the voltage VE to the bridge circuit a decreases. When the ambient temperature decreases, this voltage VE increases again. Such fluctuations in voltage VE directly result in fluctuations in voltage V9 between midpoints A and B of bridge circuit a, and further result in fluctuations in absolute humidity detection signal VAH. In this way, in the conventional example, the absolute humidity detection signal VAH changes due to a change in the ambient temperature, and the reference level vAHo, ! 1: It becomes difficult to accurately set and control the heating time. In order to solve this problem, it is possible to install an ambient temperature sensor and use the detection signal from this ambient temperature sensor, but this requires a separate expensive ambient temperature sensor, and there is also a need for installation space for the sensor. There are disadvantages such as the need for complicated electrical connections between the two.

く目的〉 本発明は上述の問題点に鑑みてなされたものであって、
別途に雰囲気温度センサを含む高価で力′・つ構成が複
雑な温度検出回路を増設することなく、絶対湿度セ/す
の雰囲気温度の影響を取り除き、どのような雰囲気温度
の条件下でも正確な加熱時間制御を容易に行えるように
することを目的とする。
Purpose> The present invention has been made in view of the above-mentioned problems, and
It eliminates the influence of ambient temperature on the absolute humidity sensor and provides accurate results under any ambient temperature conditions without adding a separate, expensive and complex temperature detection circuit that includes an ambient temperature sensor. The purpose is to enable easy heating time control.

〈実施例〉 以下、本発明の実施例を電子レンジに適用して図面を参
照しながら説明する。
<Example> Hereinafter, an example of the present invention will be described as applied to a microwave oven with reference to the drawings.

第3図は、この実施例が適用される電子レンジの正面図
であり、第4図は第3図の概略化した断面図である。電
子レンジ1の前面の操作ノ;ネル2にはマイクロ波加熱
用とヒータ加熱用のそれぞれの加熱キー3,4が設けら
れる。電子レンジ1のオーブン5に形成された排気口6
に近接して絶対湿度センサ7が設置される。8は被加熱
体としての食品、9は食品8をオーブン5に出し入れす
るドアである。
FIG. 3 is a front view of a microwave oven to which this embodiment is applied, and FIG. 4 is a schematic cross-sectional view of FIG. 3. The operation panel 2 on the front side of the microwave oven 1 is provided with heating keys 3 and 4 for microwave heating and heater heating, respectively. Exhaust port 6 formed in oven 5 of microwave oven 1
An absolute humidity sensor 7 is installed close to. Reference numeral 8 indicates food as an object to be heated, and reference numeral 9 indicates a door for taking the food 8 into and out of the oven 5.

第5図はこの電子レンジ1の内部回路図である。FIG. 5 is an internal circuit diagram of this microwave oven 1.

絶対湿度センサ7は、μ開放型のサーミスタR1と密閉
型のサーミスタ馬とよりなる第1直列回路と2つの抵抗
R3,R,よりなる第2直列回路とを並列に接続してな
るブリッジ回路10と、演算増幅器11とを備える。ブ
リッジ回路10の抵抗’31 RJ側の中点Bは演算増
幅器11の正相入力端子十に接続すれる。サーミスタR
IIRZ側の中点Aは、演算増幅器11の逆相入力端子
−に接続される。前記第1.第2直列回路の各接続点C
,D間には、電よびインターフェイス14を介して加熱
制御部15に接続される。ブリッジ回路10の中点B(
d2、m2A/D変換器16およびインターフェイス1
4を介して加熱制御部15に接続される。
The absolute humidity sensor 7 is a bridge circuit 10 formed by connecting in parallel a first series circuit consisting of a μ open-type thermistor R1 and a closed-type thermistor, and a second series circuit consisting of two resistors R3 and R. and an operational amplifier 11. The midpoint B of the resistor '31 RJ side of the bridge circuit 10 is connected to the positive phase input terminal 10 of the operational amplifier 11. Thermistor R
The midpoint A on the IIRZ side is connected to the negative phase input terminal - of the operational amplifier 11. Said 1st. Each connection point C of the second series circuit
, D are connected to a heating control section 15 via an electric wire and an interface 14. Midpoint B of the bridge circuit 10 (
d2, m2 A/D converter 16 and interface 1
It is connected to the heating control section 15 via 4.

16は加熱制御部15の出力を受けてオン・オフするス
イッチ、17はスイッチ16のオン・A−)により電源
コンセント18からの商用電源が供給・遮断されてマイ
クロ波を発生・停止するブイクロ波発生回路である。
16 is a switch that is turned on and off in response to the output of the heating control unit 15, and 17 is a microwave that generates and stops microwaves when the commercial power from the power outlet 18 is supplied and cut off by the ON/A-) of the switch 16. This is a generation circuit.

次に、動作を説明する。Next, the operation will be explained.

操作パネル2の加熱キー3が操作されることにより、加
熱制御部15には加熱スタート信号が与えられる。加熱
制御部15は、この加熱スタート信号によりスイッチ1
6に駆動信号を与え、これによりスイッチ16がオンし
てマイクロ波発生回路18がマイクロ波を発生する。こ
うして、オーブン5内の食品8はマイクロ波加熱される
。この加熱に伴なって、絶対湿度センサ7からの絶対湿
度検出信号VA11が加熱制御部15に与えられる。
When the heating key 3 of the operation panel 2 is operated, a heating start signal is given to the heating control section 15. The heating control section 15 turns on the switch 1 based on this heating start signal.
A drive signal is applied to the switch 6, which turns on the switch 16 and causes the microwave generation circuit 18 to generate microwaves. In this way, the food 8 in the oven 5 is heated by microwaves. Along with this heating, an absolute humidity detection signal VA11 from the absolute humidity sensor 7 is provided to the heating control section 15.

これと同時に、ブリッジ回路10の中点Bかもの雰囲気
温度検出信号vTpも加熱制御部15に与えられる。両
信号■ΔH,VTPは第6図、第7図に示すようにして
変化する。第6図、第7図の横軸は加熱時間Uを示し、
縦軸は信号のレベルを示す。
At the same time, the ambient temperature detection signal vTp at the midpoint B of the bridge circuit 10 is also given to the heating control section 15. Both signals ΔH and VTP change as shown in FIGS. 6 and 7. The horizontal axes in FIGS. 6 and 7 indicate the heating time U,
The vertical axis indicates the signal level.

第6図はオーブン5の内部温度がマイクロ波加熱開始時
に常温であったときの両信号VAH、VTPの変化を代
表的に示している。第7図はオーブン5の内部温度がマ
イクロ波加熱時に高温であったときの両信号VAH、V
rpの変化を代表的に示している。第6図、第7図にお
いて、toは加熱開始時刻、tlは加熱終了時刻をそれ
ぞれ示す。加熱制御部15は両信号VAn 、VTPに
基づいて次式の演算を行う。
FIG. 6 typically shows changes in both signals VAH and VTP when the internal temperature of the oven 5 is room temperature at the start of microwave heating. Figure 7 shows both signals VAH and V when the internal temperature of the oven 5 is high during microwave heating.
Changes in rp are representatively shown. In FIGS. 6 and 7, to indicates the heating start time and tl indicates the heating end time, respectively. The heating control unit 15 calculates the following equation based on both signals VAn and VTP.

■−ア VAH VTP ここで、kは加熱制御部15が、マイクロコンピュータ
で構成されている場合の処理上のスケール係数、■は雰
囲気温度検出信号VTPに基づいて絶対湿度検出信号を
補正してなる補正値である。
■-A VAH VTP Here, k is a processing scale coefficient when the heating control section 15 is configured with a microcomputer, and ■ is obtained by correcting the absolute humidity detection signal based on the ambient temperature detection signal VTP. This is a correction value.

この補正値■は加熱時間の経過に伴なって第6図。This correction value ■ is shown in FIG. 6 as the heating time elapses.

第7図に示すように変化する。この補正値Vは第2図に
示すものと同様となり、雰囲気温度の影響を受けていな
いものである。したかつて、この補。
It changes as shown in FIG. This correction value V is similar to that shown in FIG. 2, and is not affected by the ambient temperature. Once upon a time, this supplement.

正値■は、加熱された食品8が発生する水蒸気の量に正
確に対応している。加熱制御部15は、この補正値Vが
、時刻t1において所定の基準レベルVAHOに到達す
るときにスイッチ16をオフにする信号を出力する。ス
イッチ16のオフにより、マイクロ波発生回路18はマ
イクロ波の発生を停止する。こうして、マイクロ波加熱
が終了する。したがって、この実施例によれば、絶対湿
度センサ7の雰囲気温度が変動しても、この雰囲気温度
の影響を受けることなく食品の加熱仕」ニリを制御でき
る。
The positive value ■ corresponds exactly to the amount of water vapor generated by the heated food 8. The heating control unit 15 outputs a signal to turn off the switch 16 when the correction value V reaches a predetermined reference level VAHO at time t1. When the switch 16 is turned off, the microwave generation circuit 18 stops generating microwaves. In this way, microwave heating is completed. Therefore, according to this embodiment, even if the ambient temperature of the absolute humidity sensor 7 fluctuates, the heating process of the food can be controlled without being affected by this ambient temperature.

く効果〉 以上のように、本発明によれば絶対湿度検出信号と、絶
対湿度センサの雰囲気温度検出信号とを加熱制御部に与
え、この加熱制御部は雰囲気温度検出信号に基づいて絶
対湿度検出信号を補正し、この補正値に基づいて被加熱
体の加熱仕上りを制御するようにしたので、雰囲気温度
を検出するだめの高価なセンサおよびそのセンサの出力
を処理する回路や電気結線およびこれらの設置のだめの
スペースを必要さく−なくなる一方で、雰囲気温度の影
響を受けることなく正確な加熱温度制御を容易に行うこ
とができる。
Effect> As described above, according to the present invention, the absolute humidity detection signal and the ambient temperature detection signal of the absolute humidity sensor are provided to the heating control section, and the heating control section detects the absolute humidity based on the ambient temperature detection signal. Since the signal is corrected and the heating finish of the heated object is controlled based on this correction value, there are no expensive sensors for detecting the ambient temperature, circuits and electrical connections for processing the output of the sensor, and the need for these. While reducing the need for installation space, accurate heating temperature control can be easily performed without being affected by ambient temperature.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は絶対湿度センサの回路図、第2図は絶対湿度セ
ンサからの絶対湿度検出信号の加熱時間経過に伴なう変
化を示す図、第3図〜第7図は本発明の実施例に係り、
第3図はこの実施例が適用される電子レンジの正面図、
第4図は第3図の概略化した断■u図、第5図は第3図
の電子し/ジの内部回路図、第6図、第7図は加熱調理
開始時の温度がそれぞれ、常温、高温の場合の絶対湿度
検出信号、雰囲気温度検出信号および両信号に基づく補
正値についてのレベル変化を示す図である。 7・・絶対湿度センサ、R,、R,・・サーミスタ、馬
。 R4・・抵抗体、Rs・電流制限抵抗、12・・直流電
源、15・加熱制御部。 出 願 人 シャープ株式会社 代 理 人 弁理士岡田和秀 第1図 ll52 図 第3図 第4図 第6図 第7図
Fig. 1 is a circuit diagram of the absolute humidity sensor, Fig. 2 is a diagram showing changes in the absolute humidity detection signal from the absolute humidity sensor as the heating time elapses, and Figs. 3 to 7 are examples of the present invention. In relation to
FIG. 3 is a front view of a microwave oven to which this embodiment is applied;
Fig. 4 is a simplified cross-sectional diagram of Fig. 3, Fig. 5 is an internal circuit diagram of the electronic cooker/display shown in Fig. 3, and Figs. 6 and 7 show the temperature at the start of cooking, respectively. FIG. 7 is a diagram showing level changes in an absolute humidity detection signal, an ambient temperature detection signal, and correction values based on both signals in the case of normal temperature and high temperature. 7. Absolute humidity sensor, R,, R,... Thermistor, horse. R4: Resistor, Rs: Current limiting resistor, 12: DC power supply, 15: Heating control unit. Applicant: Sharp Co., Ltd. Agent: Kazuhide Okada, Patent Attorney Figure 1 ll52 Figure 3 Figure 4 Figure 6 Figure 7

Claims (1)

【特許請求の範囲】[Claims] +1) 密閉型と開放型の少なくとも2つのサーミスタ
よりなる第1直列回路と、少なくとも2つの抵抗よシな
る第2直列回路とを並列に接続してなるブリッジ回路を
含む絶対湿度センサを有し、前記両直列回路の接続点間
に電流制限抵抗を介して絶対湿度センサの直流電源・を
接続し、前記両直列回路のそれぞれの中点間で得られる
絶対湿度検出信号により被加熱体の加熱仕上り制御を行
う加熱調理装置において、絶対湿度検出信号と、第2直
列回路の中点より得られる雰囲気温度検出信号とが与え
られる加熱制御部を設け、加熱制御部は雰囲気温度検出
信号に基づいて絶対湿度検出信号を補正するとともに、
この補正値に基づいて加熱制御することを特徴とする加
熱調理装置。
+1) an absolute humidity sensor including a bridge circuit formed by connecting in parallel a first series circuit consisting of at least two thermistors of a closed type and an open type and a second series circuit consisting of at least two resistors; A DC power source for an absolute humidity sensor is connected between the connection points of both series circuits through a current limiting resistor, and the heating finish of the heated object is determined by the absolute humidity detection signal obtained between the midpoints of both series circuits. In the heating cooking apparatus that performs the control, a heating control section is provided to which an absolute humidity detection signal and an ambient temperature detection signal obtained from the midpoint of the second series circuit are given, and the heating control section is configured to perform absolute humidity detection based on the ambient temperature detection signal. In addition to correcting the humidity detection signal,
A heating cooking device that performs heating control based on this correction value.
JP14094283A 1983-08-01 1983-08-01 Heating cooking device Granted JPS6032288A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14094283A JPS6032288A (en) 1983-08-01 1983-08-01 Heating cooking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14094283A JPS6032288A (en) 1983-08-01 1983-08-01 Heating cooking device

Publications (2)

Publication Number Publication Date
JPS6032288A true JPS6032288A (en) 1985-02-19
JPH0312435B2 JPH0312435B2 (en) 1991-02-20

Family

ID=15280396

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14094283A Granted JPS6032288A (en) 1983-08-01 1983-08-01 Heating cooking device

Country Status (1)

Country Link
JP (1) JPS6032288A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5345184A (en) * 1991-12-16 1994-09-06 Sharp Kabushiki Kaisha Humidity detection circuit for electronic heat cooking apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55181537U (en) * 1979-06-14 1980-12-26
JPS57188938A (en) * 1981-05-19 1982-11-20 Mitsubishi Electric Corp Cooking device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55181537U (en) * 1979-06-14 1980-12-26
JPS57188938A (en) * 1981-05-19 1982-11-20 Mitsubishi Electric Corp Cooking device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5345184A (en) * 1991-12-16 1994-09-06 Sharp Kabushiki Kaisha Humidity detection circuit for electronic heat cooking apparatus

Also Published As

Publication number Publication date
JPH0312435B2 (en) 1991-02-20

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