JPH06277145A - Rice cooker - Google Patents
Rice cookerInfo
- Publication number
- JPH06277145A JPH06277145A JP718894A JP718894A JPH06277145A JP H06277145 A JPH06277145 A JP H06277145A JP 718894 A JP718894 A JP 718894A JP 718894 A JP718894 A JP 718894A JP H06277145 A JPH06277145 A JP H06277145A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- rice
- heating
- heater
- reheating
- 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
- Cookers (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は保温状態の飯を再加熱で
きるようにした炊飯器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker capable of reheating rice in a warm state.
【0002】[0002]
【従来の技術】従来のこの種の炊飯器は、被炊飯物たる
米と水を容器たる鍋に収容した後、制御手段に予め記憶
された加熱パターンに基づき、炊飯ヒータや保温ヒータ
などの加熱手段を制御しながら、炊飯および保温等の各
行程を実行するようにしているが、保温行程時には容器
内の飯が炊き上がり温度よりも低い所定の保温温度に保
たれるため、温度的に熱い炊きたて感の有る飯が得られ
ないという欠点がある。このような問題点に対処するた
めに、例えば、一度断電状態となり容器内の温度が保温
温度以下になると、再通電後温度検出手段たるサーミス
タが保温温度に達した時点から制御温度を保温温度より
一定時間高く設定することのできる特公昭60−748
6号公報に開示された調理器や、あるいは、保温中に蓋
体を開放後閉塞すると、保温温度よりも高い温度にて鍋
を所定時間加熱するようにした特開昭57−99925
号公報に開示された炊飯器の加熱制御技術などを利用す
ることで、容器内に収容された飯を保温温度より高い温
度に再加熱することができる。また、特開昭59−15
1919号公報には、電気湯沸器ではあるが、再沸騰ス
イッチを操作すると容器内の湯水を加熱保温状態から加
熱沸騰状態に切換えて、再沸騰させることができるもの
が開示されており、この再沸騰の技術を炊飯器に適用す
ることも考えられる。2. Description of the Related Art A conventional rice cooker of this type stores rice, which is rice to be cooked, and water in a pot as a container, and then heats a rice heating heater or a warming heater based on a heating pattern stored in advance in a control means. While controlling the means, each process such as rice cooking and heat retention is executed, but during the heat retention process, the rice in the container is kept at a predetermined heat retention temperature lower than the temperature of the rice cooked, so it is hot There is a drawback that you cannot get freshly cooked rice. In order to deal with such a problem, for example, once the power is cut off and the temperature inside the container becomes equal to or lower than the heat retention temperature, the control temperature is kept at the heat retention temperature from the time when the thermistor, which is the temperature detecting means after re-energization, reaches the heat retention temperature. It can be set higher for a certain period of time.
When the cooker disclosed in Japanese Patent Publication No. 6 or the lid is opened and then closed during heat retention, the pan is heated at a temperature higher than the heat retention temperature for a predetermined time.
The rice contained in the container can be reheated to a temperature higher than the heat retention temperature by using the heating control technology of the rice cooker disclosed in the publication. Also, JP-A-59-15
In the 1919 publication, although it is an electric water heater, it is disclosed that when the re-boiling switch is operated, the hot and cold water in the container can be switched from the heat-retaining state to the heating-boiling state and re-boiling. It is also possible to apply the re-boiling technique to the rice cooker.
【0003】[0003]
【発明が解決しようとする課題】上記従来技術におい
て、特公昭60−7486号公報および特開昭57−9
9925号公報に記載のものは、制御温度を保温中にお
ける所定の設定温度よりも高く設定することで、容器内
の飯を再加熱することができるが、これらのものは、電
源を再投入したり、蓋体を開放後閉塞しない限り再加熱
動作が実行されないため、その操作が煩わしい。また、
高く設定された制御温度は容器内の飯の容量に拘らず一
定時間継続するため、特に飯が小容量の場合には焦げが
発生するなどの問題点がある。また、一方、特開昭59
−151919号公報に記載のものは、操作スイッチを
操作することで、容器内の湯水を加熱沸騰状態に切換え
ることができる。しかし、こうした電気湯沸器の場合、
再沸騰時における加熱パターンは電源投入時に容器内の
水を沸騰させる加熱パターンと同一であり、これをその
まま炊飯器に適用させると、飯がドライアップ状態とな
るまで容器内が加熱され、著しい加熱過多となる。した
がって、再加熱後の飯に焦げが発生し、満足な食味を得
ることができない。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-mentioned prior art, Japanese Patent Publication No. 60-7486 and Japanese Unexamined Patent Publication No. 57-9.
In the one described in Japanese Patent No. 9925, the rice in the container can be reheated by setting the control temperature higher than a predetermined set temperature during heat retention. Alternatively, the reheating operation is not executed unless the lid is closed after opening, which makes the operation troublesome. Also,
Since the control temperature set to a high value continues for a certain period of time regardless of the volume of rice in the container, there is a problem that charring occurs especially when the volume of rice is small. On the other hand, on the other hand, JP-A-59
In the device described in Japanese Patent Publication No. 151919, the hot and cold water in the container can be switched to the heating and boiling state by operating the operation switch. However, in the case of such an electric water heater,
The heating pattern at the time of reboil is the same as the heating pattern of boiling the water in the container when the power is turned on.If this is applied to the rice cooker as it is, the inside of the container will be heated until the rice is in a dry up state Too many. Therefore, the cooked rice is burnt, and a satisfactory taste cannot be obtained.
【0004】そこで本発明は、保温中の再加熱時におけ
る焦げの発生を防止して、飯の食味を損なうことなく、
炊きたて感のある飯を得ることができる炊飯器を提供す
ることを目的とする。Therefore, the present invention prevents the occurrence of charring during reheating during heat retention, without impairing the taste of rice,
It is an object to provide a rice cooker that can obtain freshly cooked rice.
【0005】[0005]
【課題を解決するための手段】本発明は被炊飯物を収容
する容器と、この容器を加熱する加熱手段と、前記容器
の温度を検出する温度検出手段と、再加熱指示手段と、
前記温度検出手段からの検出温度に基づいて前記加熱手
段を制御して炊飯および保温等の各行程を実行する制御
手段とを具備し、この制御手段は保温行程中に前記再加
熱指示手段が操作されると、飯を保温行程中の加熱手段
の加熱量より大きい加熱量により再加熱して保温時の保
温温度よりも高い所定温度にまで加熱する再加熱行程を
実行するものである。According to the present invention, there is provided a container for containing cooked food, heating means for heating the container, temperature detecting means for detecting the temperature of the container, and reheating instruction means.
The heating means is controlled based on the temperature detected by the temperature detecting means, and a control means for executing each step such as rice cooking and heat retention is provided, and the control means operates the reheating instruction means during the heat retention step. Then, the rice is reheated by a heating amount larger than the heating amount of the heating means during the heat retaining process and heated to a predetermined temperature higher than the heat retaining temperature during the heat retaining process.
【0006】[0006]
【作用】上記構成により、再加熱指示手段を操作する
と、制御手段は容器内の飯が保温時における保温温度よ
りも高い所定温度となるまで、温度検出手段からの検出
温度に基づいて加熱手段を加熱制御し、再加熱行程を実
行する。With the above-mentioned structure, when the reheating instruction means is operated, the control means operates the heating means based on the temperature detected by the temperature detection means until the rice in the container reaches a predetermined temperature higher than the heat retention temperature during heat retention. The heating is controlled and the reheating process is executed.
【0007】[0007]
【実施例】以下、本発明の一実施例を添付図面を参照し
て説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.
【0008】図3および図4は炊飯器の概略構成を示
し、同図において1は本体であり、この本体1は略有底
円筒状の外枠2と、この外枠2内に配置された略有底円
筒状の内枠3と、これら内枠3および外枠2の上端部間
を連結する枠体4と、前記内枠3の底部にスプリング5
を介して設けられた反射板6と、この反射板6の上面側
に設けられた例えば600 Wの加熱手段たる炊飯ヒータ7
と、前記内枠3の外周面に装着され、例えば100 Wの2
本の加熱手段たる保温ヒータ8,9を埋設した熱盤10と
から構成されている。11は前記内枠3内に収容される略
有底円筒状の容器たる鍋であり、この鍋11を前記内枠3
内に収容した状態における鍋11の高さの中心線lの下方
に一方の保温ヒータ8が設けられ、上方に他方の保温ヒ
ータ9が設けられている。12は前記反射板6の中央開口
部6Aにスプリング5Aを介して設けられた受筒13の内
部に配設されたサーミスタ等の温度センサであり、前記
スプリング5Aの付勢により受筒13が前記鍋11の底部に
接触するようにしている。14は蓋体であり、この蓋体14
の下面には内蓋15が一体的に設けられている。16は前記
内枠3の上部に一体的に設けられ内周面には少なくとも
前記保温ヒータ8,9に対応した箇所に酸化金属被膜処
理または黒色塗装等の表面処理が施された上部内枠であ
る。また図4の説明図で示すように炊飯ヒータ7のリー
ド接続部たる口元部7Aと保温ヒータ8,9の口元部8
A,9Aとが相互に180 ゜ずれた状態で炊飯ヒータ7お
よび保温ヒータ8,9が設けられている、また前記鍋11
には被炊飯物たる米17と水18が収容されている。3 and 4 show a schematic structure of the rice cooker. In FIG. 3, reference numeral 1 is a main body, and the main body 1 is an outer frame 2 having a substantially bottomed cylindrical shape, and is arranged in the outer frame 2. A substantially bottomed cylindrical inner frame 3, a frame body 4 connecting the upper ends of the inner frame 3 and the outer frame 2, and a spring 5 at the bottom of the inner frame 3.
And a rice cooking heater 7 as a heating means of, for example, 600 W provided on the upper surface side of the reflection plate 6
And is attached to the outer peripheral surface of the inner frame 3, for example 2 of 100 W
It is composed of a heating plate 10 in which warming heaters 8 and 9 as book heating means are embedded. Reference numeral 11 denotes a pot, which is a substantially bottomed cylindrical container housed in the inner frame 3, and the pot 11 is used as the inner frame 3
One of the heat retaining heaters 8 is provided below the center line 1 of the height of the pan 11 in the state of being housed inside, and the other heat retaining heater 9 is provided above. Reference numeral 12 denotes a temperature sensor such as a thermistor disposed inside a receiving cylinder 13 provided in the central opening 6A of the reflection plate 6 via a spring 5A. The receiving cylinder 13 is urged by the spring 5A. It makes contact with the bottom of the pan 11. 14 is a lid, and this lid 14
An inner lid 15 is integrally provided on the lower surface of the. Reference numeral 16 denotes an upper inner frame which is integrally provided on the upper portion of the inner frame 3 and whose inner peripheral surface is subjected to a surface treatment such as a metal oxide coating treatment or black coating at least at a position corresponding to the heat insulation heaters 8 and 9. is there. Further, as shown in the explanatory view of FIG. 4, a mouth portion 7A which is a lead connecting portion of the rice cooking heater 7 and a mouth portion 8 of the heat retaining heaters 8 and 9
The rice cooking heater 7 and the warming heaters 8 and 9 are provided in a state where they are shifted from each other by 180 ° with respect to each other, and the pan 11 is also provided.
The rice that is to be cooked 17 and the water 18 are stored in.
【0009】図2は電気的構成を示すブロック図であ
り、同図において19は前記温度センサ12とで温度検出手
段20を構成するA/D変換器であり、前記温度検出手段
20によって鍋11の温度を検出し、この検出温度に応じた
温度検出信号を出力する。21はマイクロコンピュータか
ら成る制御手段であり、これは周知のように前記A/D
変換器19,CPU22,タイマ回路23,メモリ24,入力回
路25,出力回路26等を有して成る。この制御手段21は、
これが保有する制御プログラムに従い前記炊飯ヒータ7
および保温ヒータ8,9の駆動制御を行うものであり、
さらに前記温度検出手段20からの検出温度に基づいて容
量の検出および炊飯行程におけるドライアップ(炊き上
り)状態の検出を行い、また再加熱行程における再加熱
終了状態の検出等を行う。27はヒータ駆動手段たるリレ
ー駆動回路であり、これは前記出力回路26に接続され、
前記制御手段21からの信号により後述する各リレースイ
ッチをオン,オフして後述するヒータ回路の切換制御を
行う。36は前記入力回路25に接続された再加熱指示手段
である。FIG. 2 is a block diagram showing an electrical configuration. In FIG. 2, reference numeral 19 denotes an A / D converter which constitutes a temperature detecting means 20 together with the temperature sensor 12.
The temperature of the pan 11 is detected by 20 and a temperature detection signal corresponding to the detected temperature is output. Reference numeral 21 is a control means composed of a microcomputer, which is, as is well known, the A / D.
It comprises a converter 19, a CPU 22, a timer circuit 23, a memory 24, an input circuit 25, an output circuit 26 and the like. This control means 21
According to the control program held by this, the rice cooking heater 7
And for controlling the drive of the heat insulation heaters 8 and 9,
Further, based on the temperature detected by the temperature detecting means 20, the capacity is detected, the dry-up (cook-up) state in the rice cooking process is detected, and the reheating end state in the reheating process is detected. 27 is a relay drive circuit as a heater drive means, which is connected to the output circuit 26,
A relay switch, which will be described later, is turned on and off in response to a signal from the control means 21 to control switching of a heater circuit, which will be described later. Reference numeral 36 is a reheating instruction means connected to the input circuit 25.
【0010】図1は回路図を示し、同図のように電源電
圧eの出力端子には第1のリレースイッチ28の接点28B
を介して接続される炊飯ヒータ7と、第2および第3の
リレースイッチ29,30とが直列接続されている。また前
記第1のリレースイッチ28の接点28Cと前記第2のリレ
ースイッチ29の接点29Aとが接続されているとともに、
前記第1のリレースイッチ28の固定接点28Aと第2,第
3のリレースイッチ29,30の共通の固定接点31との間に
一方の保温ヒータ8が接続されている。また前記第1の
リレースイッチ28の固定接点28Aと前記第3のリレース
イッチ30の接点30Aとの間に他方の保温ヒータ9が接続
され、このようにしてヒータ回路32が構成されている。
一方電源電圧eの出力端子には、電源トランス33および
直流電源回路34を介して前記制御手段21が接続され、こ
の制御手段21の入力側には前記温度センサ12が接続さ
れ、出力側には前記リレー駆動回路27が接続されてい
る。FIG. 1 shows a circuit diagram. As shown in FIG. 1, the contact 28B of the first relay switch 28 is connected to the output terminal of the power supply voltage e.
The rice cooking heater 7 and the second and third relay switches 29 and 30 are connected in series. Further, the contact 28C of the first relay switch 28 and the contact 29A of the second relay switch 29 are connected, and
One heat retaining heater 8 is connected between the fixed contact 28A of the first relay switch 28 and the common fixed contact 31 of the second and third relay switches 29, 30. Further, the other heat retaining heater 9 is connected between the fixed contact 28A of the first relay switch 28 and the contact 30A of the third relay switch 30, and the heater circuit 32 is configured in this manner.
On the other hand, the output terminal of the power supply voltage e is connected to the control means 21 via a power transformer 33 and a DC power supply circuit 34, the temperature sensor 12 is connected to the input side of the control means 21, and the output side is connected to the output side. The relay drive circuit 27 is connected.
【0011】次に図5乃至図9を参照にして作用につい
て説明する。Next, the operation will be described with reference to FIGS.
【0012】まず炊飯スタートスイッチ(図示せず)が
オンされると、制御手段21から炊飯信号が出力され、こ
の炊飯信号によってリレー駆動回路27は図7のように第
1のリレースイッチ28を接点28Bに接続するとともに第
2および第3のリレースイッチ29,30を接点29A,30A
に接続して炊飯用ヒータ回路32Aを形成する。この炊飯
用ヒータ回路32Aは炊飯ヒータ7および保温ヒータ8,
9が相互に並列接続され、炊飯ヒータ7を主にした高発
熱量となる。すなわち炊飯ヒータ7の600 Wと保温ヒー
タ8,9の200 Wとで800 W出力が得られる。そしてこ
の高出力で適宜通断電することによりひたし炊き行程が
実行され、その後炊飯行程に移行する。この炊飯行程で
は、そのまま高出力で鍋11が加熱され、温度検出手段20
による検出温度が沸騰状態の温度に達したとして検出さ
れた後、前記検出温度に基づき鍋11内がドライアップ状
態であるとして検出された時点に炊飯用ヒータ回路32A
による加熱を停止して炊飯行程を終了させ、その後前記
高出力で炊飯用ヒータ回路32Aを通断電して所定時間例
えば15分程度むらし行程を実行した後保温行程に移行す
る。この保温行程では、制御手段21から保温信号が出力
され、この信号によってリレー駆動回路27は図8のよう
に第1および第3のリレースイッチ28,30をオフして保
温用ヒータ回路32Bを形成する。この保温用ヒータ回路
32Bは炊飯ヒータ7と保温ヒータ8,9とが相互に直列
接続され、保温ヒータ8,9を主にした低発熱量とな
る。すなわち炊飯ヒータ7の3.6 Wと保温ヒータの42W
とで略46W出力が得られる。そしてこの低出力で適宜通
断電することにより所定保温温度例えば73℃に維持され
る。First, when a rice-cooking start switch (not shown) is turned on, a rice-cooking signal is output from the control means 21, and the rice-cooking signal causes the relay drive circuit 27 to contact the first relay switch 28 as shown in FIG. 28B and connect the second and third relay switches 29, 30 to contacts 29A, 30A
To form a rice cooking heater circuit 32A. This rice cooking heater circuit 32A includes a rice cooking heater 7 and a heat retaining heater 8,
9 are connected in parallel with each other, and the amount of heat generated mainly by the rice cooking heater 7 is high. That is, 800 W output is obtained with 600 W of the rice cooking heater 7 and 200 W of the heat insulation heaters 8 and 9. Then, the hot water cooking process is executed by appropriately turning on / off the power at this high output, and then the process shifts to the rice cooking process. In this rice cooking process, the pan 11 is heated with high output as it is, and the temperature detecting means 20
After it is detected that the temperature detected by means of has reached the temperature of the boiling state, and at the time when it is detected that the inside of the pan 11 is in the dry-up state based on the detected temperature, the rice cooker heater circuit 32A
Then, the rice cooking process is terminated, the rice cooking heater circuit 32A is turned off at the high output, and the steaming process is performed for a predetermined time, for example, about 15 minutes, and then the heat retaining process is performed. In this warming process, the warming signal is output from the control means 21, and the relay driving circuit 27 turns off the first and third relay switches 28 and 30 by this signal to form the warming heater circuit 32B as shown in FIG. To do. This heater circuit for heat retention
In the case of 32B, the rice cooking heater 7 and the heat retaining heaters 8 and 9 are connected in series with each other, so that the heat retaining heaters 8 and 9 have a low heat generation amount. That is, 3.6W for rice cooking heater 7 and 42W for heat retention heater
Output of about 46W can be obtained with. Then, by appropriately turning on / off the electric power at this low output, the temperature is maintained at a predetermined temperature, for example, 73 ° C.
【0013】この保温行程中において再加熱指示手段36
がオンされると制御手段21から再加熱信号が出力され、
この信号によってリレー駆動回路27は図9のように第1
のリレースイッチ28を接点28Cに接続し、かつ第2のリ
レースイッチ29をオフするとともに第3のリレースイッ
チ30を接点30Aに接続して再加熱用ヒータ回路32Cを形
成する。この再加熱用ヒータ回路32Cは相互に並列接続
された保温ヒータ8,9が炊飯ヒータ7に直列接続さ
れ、保温ヒータ8,9を主にした中発熱量となる。すな
わち炊飯ヒータ7の37Wと保温ヒータ8,9の112.5 W
の略150 W出力が得られる。そしてこの再加熱用ヒータ
回路32Cによる中出力で鍋11が再加熱されるものであ
り、その過程において、図6のように検出温度が73℃乃
至100 ℃の間の所定の2時点例えば80℃の時点Pa から
87℃の時点Pb に達するまでの時間T1 をカウントし、
2時点Pa ,Pb 間の上昇温度t1 と時間T1 から温度
上昇率を求め、この温度上昇率が所定範囲以下であれば
再加熱される飯の容量を大容量、所定範囲内であれば中
容量、所定範囲以上であれば小容量として検出する。そ
して後述する再加熱終了状態の温度上昇率を大容量では
4℃/9分,中容量では4℃/6分,小容量では4℃/
3分としてそれぞれ設定する。このようにして検出温度
が100 ℃になる前の所定温度例えば80℃から継続して上
昇温度t2 =4℃に対する経過時間T2 を求め、その上
昇温度t2 と時間T2 から求めた温度上昇率が再加熱容
量に応じて設定された上記設定値に達した時点Pc に鍋
11内の飯が図6のA曲線のように実際に100 ℃に達した
再加熱終了状態として検出され、前述した保温行程に移
行する。During this heat retention process, the reheating instruction means 36
When is turned on, the control means 21 outputs a reheat signal,
This signal causes the relay drive circuit 27 to move to the first position as shown in FIG.
The relay switch 28 is connected to the contact 28C, the second relay switch 29 is turned off, and the third relay switch 30 is connected to the contact 30A to form the reheating heater circuit 32C. In this reheating heater circuit 32C, the heat retaining heaters 8 and 9 connected in parallel to each other are connected in series to the rice cooking heater 7, and the heat retaining heaters 8 and 9 mainly generate medium heat. That is, 37W of the rice cooking heater 7 and 112.5W of the heat insulation heaters 8 and 9
The output of about 150 W is obtained. Then, the pot 11 is reheated by the medium power output by the reheating heater circuit 32C, and in the process, as shown in FIG. 6, the detection temperature is at a predetermined two points between 73 ° C and 100 ° C, for example, 80 ° C. From the point Pa
The time T1 to reach the point Pb of 87 ° C is counted,
The temperature rise rate is calculated from the temperature rise t1 between the two time points Pa and Pb and the time T1. If this temperature rise rate is below a predetermined range, the volume of reheated rice is large, and if it is within a predetermined range, it is medium volume. If it is above a predetermined range, it is detected as a small capacity. The rate of temperature rise in the reheating end state described later is 4 ° C / 9 minutes for large capacity, 4 ° C / 6 minutes for medium capacity, and 4 ° C / minute for small capacity.
Set as 3 minutes each. In this way, the elapsed time T2 for the rising temperature t2 = 4 ° C. is continuously obtained from a predetermined temperature before the detected temperature reaches 100 ° C., for example 80 ° C., and the temperature rising rate obtained from the rising temperature t2 and the time T2 is re-established. When the above set value set according to the heating capacity is reached, the pot is cooked at Pc.
The rice in 11 is detected as the reheating end state in which the temperature has actually reached 100 ° C. as shown by the curve A in FIG. 6, and the heat retention step described above is started.
【0014】このように上記実施例では、再加熱指示手
段36を操作すると、炊飯および保温などの各行程を実行
する制御手段21により、鍋11内に保温された飯に対し
て、保温行程中の加熱量である略46Wから略150 Wに加
熱量を大きくして再加熱を行うとともに、温度検出手段
20の検出温度が通常の保温時の保温温度より高い所定温
度、例えば100 ℃に達するまで加熱を行う再加熱行程が
実行される。したがって、鍋11内の飯の容量に拘らず、
保温中の飯は再加熱行程にて焦げない程度の温度に昇温
されるため、焦げによる飯の食味低下を防止して、温度
的に熱い炊きたて感の有る飯を得ることが可能となる。As described above, in the above-described embodiment, when the reheating instruction means 36 is operated, the control means 21 for executing the steps such as cooking and keeping the temperature of the rice kept in the pot 11 during the heating step. The heating amount is increased from approximately 46 W, which is the maximum heating amount, to approximately 150 W, and reheating is performed.
A reheating step is performed in which heating is performed until the detected temperature of 20 reaches a predetermined temperature higher than the heat retention temperature during normal heat retention, for example, 100 ° C. Therefore, regardless of the capacity of the rice in the pan 11,
Since the heated rice is heated to a temperature at which it does not burn during the reheating process, it is possible to prevent deterioration in the taste of the cooked rice and to obtain cooked rice that is hot and hot.
【0015】また、再加熱時において、制御手段21から
の再加熱信号により相互に並列接続された保温ヒータ
8,9を炊飯ヒータ7に直列接続して保温ヒータ8,9
を主とした中出力で再加熱されるように構成しているた
め、前記鍋11はその胴部に対応して内枠3に設けられた
保温ヒータ8,9によって112.5 Wで間接的に加熱さ
れ、かつ鍋11の底部に設けられた炊飯ヒータ7によって
37Wで加熱され、鍋11を包むようにして炊飯ヒータ7お
よび保温ヒータ8,9により再加熱される。このように
して鍋11の胴部側を主としかつ鍋11全体を包むようにし
て再加熱されるものであるため鍋11内の飯の温度むらお
よび焦げを可及的に防止することができる。従来におい
ては炊飯行程における炊き上り温度例えば120 ℃程度ま
で再加熱しつづけるため、焦げが多く生じ易いが、この
実施例では、まず検出温度が100 ℃になる以前の所定の
2時点Pa ,Pb 間の温度上昇率t1 /T1 に基づいて
大,中,小の再加熱容量の検出を行い、この検出された
容量に応じて設定された温度上昇率t2 /T2 に基づい
て再加熱行程の終了時点Pc を検出するようにしたか
ら、必要以上の加熱を防止でき食味の良好な飯が得られ
る。Further, at the time of reheating, the warming heaters 8 and 9 connected in parallel with each other in response to a reheating signal from the control means 21 are connected in series to the rice cooking heater 7 to keep them warm.
Since it is configured to be reheated mainly by the medium power, the pot 11 is indirectly heated at 112.5 W by the heat-retaining heaters 8 and 9 provided in the inner frame 3 corresponding to the body part. And by the rice cooking heater 7 provided at the bottom of the pan 11.
It is heated at 37 W and is reheated by the rice cooking heater 7 and the heat insulation heaters 8 and 9 so as to wrap the pan 11. In this way, since the main body side of the pan 11 is mainly wrapped and the whole pan 11 is reheated, it is possible to prevent temperature unevenness and burning of the rice in the pan 11 as much as possible. In the past, since the cooking temperature in the rice cooking process was continuously reheated to, for example, about 120 ° C., a lot of charring was likely to occur, but in this embodiment, first, between the two predetermined time points Pa and Pb before the detected temperature reaches 100 ° C. The large, medium, and small reheating capacities are detected based on the temperature increase rate t1 / T1 and the end point of the reheating process based on the temperature increase rate t2 / T2 set according to the detected capacity. Since Pc is detected, excessive heating can be prevented and rice with a good taste can be obtained.
【0016】また炊飯時においては、制御手段21からの
炊飯信号により炊飯ヒータ7および保温ヒータ8,9が
並列接続して炊飯ヒータ7を主とした大出力で炊飯され
るように構成しているため、鍋11は炊飯ヒータ7によっ
て600 Wで加熱され、かつ保温ヒータ8,9によって20
0 Wで加熱され、このようにして鍋11を包み込むように
して良好に炊飯される。このため、炊飯時の加熱むらが
少なくなり、水温が早く上昇する部分は米17に多くの水
18を吸収するが、水温の上昇の遅い部分は水18の吸収が
少ないことに起因して鍋11内の周囲と上部の飯が柔らか
くなり、中心部と底部が硬くなるといった現象を防止で
きる。In addition, at the time of rice cooking, the rice cooking heater 7 and the warming heaters 8 and 9 are connected in parallel in response to the rice cooking signal from the control means 21 so that the rice can be cooked with a large output mainly by the rice cooking heater 7. Therefore, the pot 11 is heated to 600 W by the rice cooking heater 7 and heated by the heat insulation heaters 8 and 20.
The rice is heated at 0 W, and the pan 11 is wrapped in this way to cook rice well. For this reason, uneven heating during rice cooking is reduced, and the portion where the water temperature rises quickly has a large amount of water in rice 17.
Although it absorbs 18, it is possible to prevent the phenomenon that the rice around the top and the inside of the pot 11 becomes soft and the center and the bottom become hard due to the small absorption of the water 18 in the part where the water temperature rises slowly.
【0017】また保温時においては、制御手段21からの
保温信号により炊飯ヒータ7および保温ヒータ8,9が
直列接続して保温ヒータ8,9を主とした小出力で保温
されるように構成しているため、鍋11は保温ヒータ8,
9によって42Wで加熱され、かつ炊飯ヒータ7によって
3.6 Wで加熱され、このようにして鍋11を全体的に保温
できるとともに、通断電時における鍋11の温度変化を抑
制することができる。また炊飯ヒータ7は鍋11の底部と
反射板6とで形成される密閉空間で発熱するため、炊飯
ヒータ7から比較的離間した鍋11の底部の中心部分まで
熱が伝わり鍋11の底部が略均一に加熱される。この場合
炊飯ヒータ7の熱盤(図示せず)を鍋11の底部周囲に接
触させたものにおいては、接触した部分と接触しない部
分との温度差が大きく、このため加熱むらを生じ易いが
本実施例では反射板6によって均一な加熱が可能であ
る。Further, when the temperature is kept warm, the rice cooking heater 7 and the warming heaters 8 and 9 are connected in series by a warming signal from the control means 21 so that the warming heaters 8 and 9 are kept warm with a small output. Therefore, the pan 11 has a heat insulation heater 8,
It is heated at 42W by 9 and by the rice cooking heater 7.
Since it is heated at 3.6 W, the pot 11 as a whole can be kept warm in this way, and the temperature change of the pot 11 at the time of power interruption can be suppressed. Further, since the rice cooking heater 7 generates heat in the closed space formed by the bottom of the pan 11 and the reflector plate 6, heat is transmitted to the central portion of the bottom of the pan 11 that is relatively distant from the rice cooking heater 7, and the bottom of the pan 11 is substantially Heated evenly. In this case, in the case where the hot plate (not shown) of the rice cooking heater 7 is brought into contact with the periphery of the bottom of the pan 11, the temperature difference between the contacted portion and the non-contacted portion is large, and thus uneven heating is likely to occur. In the embodiment, the reflector plate 6 enables uniform heating.
【0018】また図4のように炊飯ヒータ7の口元部7
Aと保温ヒータ8,9の口元部8A,9Aを相互に180
゜ずらして構成しているため、各ヒータ7,8,9の発
熱量の少なくなる口元部7A,8A,9Aの弱点を相互
に補うことができ、部分的な熱量不足を可及的に防止す
ることができ、このため部分的な加熱不足から飯の上面
が部分的に凹むという現象を解消できる。また保温ヒー
タ8,9の一方を鍋11の高さの中心より上方に設け、他
方を中心より下方に設けているため、鍋11の胴部からの
加熱状態を略均一にすることができるとともに、上部内
枠16の内周面に形成された酸化金属被膜処理または黒色
塗装等の表面処理によって保温ヒータ8,9の熱が鍋11
の胴部の全体を略均一に加熱できる。Further, as shown in FIG. 4, the mouth portion 7 of the rice cooking heater 7
A and the mouth parts 8A and 9A of the heat insulation heaters 8 and
Since the heaters 7, 8 and 9 are configured to be offset from each other, the weak points of the mouth portions 7A, 8A and 9A where the heat generation amount of the heaters 7, 8 and 9 decreases can be mutually compensated, and the partial heat amount shortage can be prevented as much as possible. Therefore, the phenomenon that the upper surface of the rice is partially depressed due to insufficient heating can be eliminated. In addition, since one of the heat insulation heaters 8 and 9 is provided above the center of the height of the pan 11 and the other is provided below the center of the pan 11, the heating state from the body of the pan 11 can be made substantially uniform. , The heat of the heaters 8 and 9 is heated by the surface treatment such as the metal oxide film treatment or the black coating formed on the inner peripheral surface of the upper inner frame 16.
It is possible to heat the entire body part of the body substantially uniformly.
【0019】図10乃至図12は本発明の他の実施例を
示し、上記実施例と同一部分に同一符号を用い同一箇所
の説明を省略して説明すると、この実施例においては、
ヒータ回路32において第1のリレースイッチ28の固定接
点28Aを共通の固定接点とする第4のリレースイッチ35
を設け、このリレースイッチ35によって保温ヒータ8,
9の一端側を接離できるようにしている。そして炊飯過
程において、制御手段21は所定の2時点例えば検出温度
が70゜の時点Pd と80゜の時点Pe 間の温度上昇t3 に
達する時間T3 を求め、この温度上昇t3 と時間T3 か
ら得られる温度上昇率t3 /T3 に基づいて前述した容
量検出と同様に大,中,小の容量検出を行い、大容量の
場合は制御手段21から出力される大容量信号によって図
10のように炊飯ヒータ7および保温ヒータ8,9が並
列接続された800 Wの大出力の大容量用ヒータ回路32D
を形成し、中容量の場合は制御手段21から出力される中
容量信号によって第4のリレースイッチ35がオフし図1
1のように炊飯ヒータ7と一方の保温ヒータ8とが並列
接続された700 Wの中出力の中容量用ヒータ回路32Eを
形成し、小容量の場合は制御手段21から出力される小容
量信号によってさらに第1のリレースイッチ28がオフし
図12のように炊飯ヒータ7による600 Wの小容量用ヒ
ータ回路32Fを形成し、このようにして炊飯容量に応じ
た発熱量を炊飯ヒータ7を主として形成される大,中,
小容量用ヒータ回路32D,32E,32Fによって得ること
ができ、これにより炊飯ヒータ7および保温ヒータ8,
9によって鍋11を全体的に加熱して炊飯することができ
るとともに、炊飯容量に応じた適正な発熱量で炊飯する
ことによりエネルギーのロスを防止できる。FIGS. 10 to 12 show another embodiment of the present invention. When the same parts as those in the above embodiment are designated by the same reference numerals and the description of the same parts is omitted, the description will be made in this embodiment.
A fourth relay switch 35 in which the fixed contact 28A of the first relay switch 28 is a common fixed contact in the heater circuit 32.
The relay switch 35 is provided with a warming heater 8,
One end side of 9 can be contacted and separated. Then, in the rice cooking process, the control means 21 obtains the time T3 at which the temperature rises t3 between predetermined time points, for example, the time point Pd at which the detected temperature is 70 ° and the time point Pe at which the detected temperature is 80 °, and is obtained from this temperature increase t3 and time T3. Large, medium, and small capacity detections are performed based on the temperature rise rate t3 / T3 in the same manner as the capacity detection described above. In the case of large capacity, a large capacity signal output from the control means 21 causes a rice cooking heater as shown in FIG. High-capacity heater circuit 32D with a large output of 800 W in which 7 and the heaters 8 and 9 are connected in parallel
In the case of the medium capacity, the fourth relay switch 35 is turned off by the medium capacity signal output from the control means 21.
As shown in FIG. 1, the rice cooking heater 7 and one of the heat retaining heaters 8 are connected in parallel to form a 700 W medium output medium capacity heater circuit 32E, and in the case of a small capacity, a small capacity signal output from the control means 21. Then, the first relay switch 28 is further turned off to form a small capacity heater circuit 32F of 600 W by the rice cooking heater 7 as shown in FIG. Large, medium,
It can be obtained by the small capacity heater circuits 32D, 32E, 32F.
9 can heat the pan 11 to cook rice as a whole, and the rice can be cooked with an appropriate calorific value according to the cooking capacity to prevent energy loss.
【0020】なお本発明は上記実施例に限定されるもの
ではなく本発明の要旨の範囲内において種々の変形実施
が可能である。例えば保温ヒータの数およびヒータ回路
の接続状態は適宜選定すればよく、また再加熱終了時点
の検出は飯の温度が100 ℃になるようにして行ったが、
90℃以上の適宜温度で検出するようにしてもよい。また
炊飯器の概略構成は各種タイプのものに適用できる。ま
た制御手段の各機能をマイクロコンピュータにより得る
ようにしたが、個別の電子回路によって得るようにして
もよい。The present invention is not limited to the above embodiment, but various modifications can be made within the scope of the gist of the present invention. For example, the number of heat-retaining heaters and the connection state of the heater circuit may be appropriately selected, and the detection at the end of reheating was performed while the temperature of the rice was 100 ° C.
The detection may be performed at an appropriate temperature of 90 ° C. or higher. Further, the schematic configuration of the rice cooker can be applied to various types. Further, although each function of the control means is obtained by the microcomputer, it may be obtained by an individual electronic circuit.
【0021】[0021]
【発明の効果】本発明における炊飯器は、被炊飯物を収
容する容器と、この容器を加熱する加熱手段と、前記容
器の温度を検出する温度検出手段と、再加熱指示手段
と、前記温度検出手段からの検出温度に基づいて前記加
熱手段を制御して炊飯および保温等の各行程を実行する
制御手段とを具備し、この制御手段は保温行程中に前記
再加熱指示手段が操作されると、飯を保温行程中の加熱
手段の加熱量より大きい加熱量により再加熱して保温時
の保温温度よりも高い所定温度にまで加熱する再加熱行
程を実行するものであり、保温中の再加熱時における焦
げの発生を防止して、飯の食味を損なうことなく、炊き
たて感のある飯を得ることができる。The rice cooker according to the present invention comprises a container for containing cooked food, heating means for heating the container, temperature detecting means for detecting the temperature of the container, reheating instruction means, and the temperature. And a control means for controlling the heating means based on the temperature detected by the detection means to execute steps such as rice cooking and heat retention, and the control means operates the reheat instruction means during the heat retention step. And a reheating step in which the rice is reheated by a heating amount larger than the heating amount of the heating means during the heat retaining process to a predetermined temperature higher than the heat retaining temperature during the heat retaining process. By preventing the occurrence of charring during heating, it is possible to obtain freshly cooked rice without impairing the taste of the rice.
【図1】本発明の一実施例を示す電気的構成の回路図で
ある。FIG. 1 is a circuit diagram of an electrical configuration showing an embodiment of the present invention.
【図2】同上電気的構成を示すブロック図である。FIG. 2 is a block diagram showing an electrical configuration of the same.
【図3】同上炊飯器の概略構成を示す断面図である。FIG. 3 is a sectional view showing a schematic configuration of the same rice cooker.
【図4】同上炊飯ヒータと保温ヒータの口元部の対応位
置を示す概略説明図である。FIG. 4 is a schematic explanatory view showing corresponding positions of mouth portions of the rice cooking heater and the warming heater.
【図5】同上経過時間と検出温度の関係を示すグラフで
ある。FIG. 5 is a graph showing the relationship between elapsed time and detected temperature.
【図6】同上再加熱行程の容量検出と再加熱終了状態の
検出を示すグラフである。FIG. 6 is a graph showing the capacity detection in the reheating process and the detection of the reheating end state in the same as above.
【図7】同上炊飯用ヒータ回路を示す回路図である。FIG. 7 is a circuit diagram showing a rice cooking heater circuit of the above.
【図8】同上保温用ヒータ回路を示す回路図である。FIG. 8 is a circuit diagram showing a heater circuit for keeping temperature same as above.
【図9】同上再加熱用ヒータ回路を示す回路図である。FIG. 9 is a circuit diagram showing a reheating heater circuit of the above.
【図10】他の実施例を示す大容量用ヒータ回路の回路
図である。FIG. 10 is a circuit diagram of a large capacity heater circuit showing another embodiment.
【図11】同上中容量用ヒータ回路を示す回路図であ
る。FIG. 11 is a circuit diagram showing a medium capacity heater circuit of the above.
【図12】同上小容量用ヒータ回路を示す回路図であ
る。FIG. 12 is a circuit diagram showing the same small capacity heater circuit as above.
7…炊飯ヒータ(加熱手段) 8,9…保温ヒータ(加熱手段) 11…鍋(容器) 17…米(被炊飯物) 18…水(被炊飯物) 20…温度検出手段 21…制御手段 36…再加熱指示手段 7 ... Rice cooking heater (heating means) 8, 9 ... Heat insulation heater (heating means) 11 ... Pan (container) 17 ... Rice (rice cooked) 18 ... Water (rice cooked) 20 ... Temperature detecting means 21 ... Control means 36 ... Reheating instruction means
Claims (1)
加熱する加熱手段と、前記容器の温度を検出する温度検
出手段と、再加熱指示手段と、前記温度検出手段からの
検出温度に基づいて前記加熱手段を制御して炊飯および
保温等の各行程を実行する制御手段とを具備し、この制
御手段は保温行程中に前記再加熱指示手段が操作される
と、飯を保温行程中の加熱手段の加熱量より大きい加熱
量により再加熱して保温時の保温温度よりも高い所定温
度にまで加熱する再加熱行程を実行することを特徴とす
る炊飯器。1. A container for containing cooked food, a heating means for heating the container, a temperature detecting means for detecting the temperature of the container, a reheating instruction means, and a temperature detected by the temperature detecting means. And a control means for controlling the heating means on the basis of the above steps to execute steps such as rice cooking and heat retention. When the reheat instruction means is operated during the heat retention step, the control means controls the rice during the heat retention step. 2. A rice cooker characterized by executing a reheating step of reheating with a heating amount larger than the heating amount of the heating means and heating up to a predetermined temperature higher than the heat retention temperature during heat retention.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6007188A JPH084554B2 (en) | 1994-01-26 | 1994-01-26 | rice cooker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6007188A JPH084554B2 (en) | 1994-01-26 | 1994-01-26 | rice cooker |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63010430A Division JPH0822255B2 (en) | 1988-01-19 | 1988-01-19 | rice cooker |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06277145A true JPH06277145A (en) | 1994-10-04 |
JPH084554B2 JPH084554B2 (en) | 1996-01-24 |
Family
ID=11659079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6007188A Expired - Lifetime JPH084554B2 (en) | 1994-01-26 | 1994-01-26 | rice cooker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH084554B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100624527B1 (en) * | 2005-01-26 | 2006-09-20 | 쿠쿠전자주식회사 | Method and device of protecting water-forming for electric rice pot |
JP2008307328A (en) * | 2007-06-18 | 2008-12-25 | Mitsubishi Electric Corp | Cooker |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5799925A (en) * | 1980-12-11 | 1982-06-21 | Sanyo Electric Co | Warmth preserving type rice cooker |
-
1994
- 1994-01-26 JP JP6007188A patent/JPH084554B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5799925A (en) * | 1980-12-11 | 1982-06-21 | Sanyo Electric Co | Warmth preserving type rice cooker |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100624527B1 (en) * | 2005-01-26 | 2006-09-20 | 쿠쿠전자주식회사 | Method and device of protecting water-forming for electric rice pot |
JP2008307328A (en) * | 2007-06-18 | 2008-12-25 | Mitsubishi Electric Corp | Cooker |
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JPH084554B2 (en) | 1996-01-24 |
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