JPH0738827B2 - rice cooker - Google Patents
rice cookerInfo
- Publication number
- JPH0738827B2 JPH0738827B2 JP19935486A JP19935486A JPH0738827B2 JP H0738827 B2 JPH0738827 B2 JP H0738827B2 JP 19935486 A JP19935486 A JP 19935486A JP 19935486 A JP19935486 A JP 19935486A JP H0738827 B2 JPH0738827 B2 JP H0738827B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heater
- temperature sensor
- boiling
- rice cooker
- 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.)
- Expired - Fee Related
Links
- 235000007164 Oryza sativa Nutrition 0.000 title claims description 12
- 235000009566 rice Nutrition 0.000 title claims description 12
- 240000007594 Oryza sativa Species 0.000 title 1
- 238000009835 boiling Methods 0.000 claims description 16
- 241000209094 Oryza Species 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims 1
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 4
- 244000145845 chattering Species 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Cookers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は特におかゆを炊飯する場合に用いられるマイク
ロコンピューター制御式の炊飯器に関するものである。Description: TECHNICAL FIELD The present invention relates to a microcomputer-controlled rice cooker used particularly when rice is cooked.
従来の技術 従来この種の炊飯器は、特開昭59−26号公報に見られる
ように、内釜温度を検出する温度センサーの他に蒸気温
度を検出する沸騰センサーを設け、これによってヒータ
ーへの通電を制御していた。2. Description of the Related Art Conventionally, this type of rice cooker is provided with a boiling sensor for detecting steam temperature in addition to a temperature sensor for detecting inner kettle temperature, as shown in Japanese Patent Laid-Open No. 59-26. Was controlling the energization of.
発明が解決しようとする問題点 上記構成によると、センサーを２つ必要とし、割高にな
り、消費者に安価に提供出来ない問題があった。Problems to be Solved by the Invention According to the above configuration, there are problems that two sensors are required, the cost is high, and the sensor cannot be provided at low cost to consumers.
問題点を解決するための手段 本発明は上記欠点を解決するためなされたものであり、
内釜温度を検出する温度センサーのみの構成とし、これ
に温度センサーの出力温度が一定温度Ｔ未満のときはヒ
ーターへ通電する通電手段と、一定温度Ｔ以上のときは
通電を停止する停止手段と、停止手段が動作してから一
定時間θの計時を行い、この計時中は温度センサーの出
力を無視する無効手段を備え、無効手段があらかじめ定
められた回数連続して動作したとき沸騰とみなす沸騰検
出装置を設けたものである。Means for Solving Problems The present invention has been made to solve the above drawbacks,
The temperature sensor has only a temperature sensor for detecting the inner kettle temperature, and has energizing means for energizing the heater when the output temperature of the temperature sensor is lower than a certain temperature T and stopping means for stopping the energizing when the temperature is more than the certain temperature T. , The stop means operates to measure a certain time θ, and during this time the temperature sensor output is ignored. Equipped with ineffective means, the ineffective means is considered to be boiling when continuously operated a predetermined number of times. A detection device is provided.
作用 上記のように構成したことにより、一定時間θの通電停
止をあらかじめ定められた回数連続して行なった場合、
沸騰とみなす。すなわち、この間一度も一定温度Ｔ未満
に下がらなかったということは内釜内部も一定温度Ｔ以
上であり、一定温度Ｔを略沸騰温度に設定しておけば沸
騰を検出する。また、内釜内が一定温度Ｔ未満（未沸
騰）であれば通電停止中に温度センサーが一定温度Ｔ未
満になり、通電手段が動作してヒーターに通電する。Action With the above configuration, when the energization is stopped for a predetermined time θ continuously for a predetermined number of times,
Consider boiling. That is, the fact that the temperature did not drop below the constant temperature T even during this time means that the inside of the inner pot is also at or above the constant temperature T, and boiling can be detected if the constant temperature T is set to a substantially boiling temperature. If the temperature inside the inner pot is lower than the constant temperature T (non-boiling), the temperature sensor becomes lower than the constant temperature T while the energization is stopped, and the energizing means operates to energize the heater.
実施例 以下本発明の一実施例を図面により説明する。Embodiment One embodiment of the present invention will be described below with reference to the drawings.
図において１は炊飯器の本体、２は内釜、３は温度セン
サー、４はヒーター、５は通電手段、６は停止手段、７
は無効手段、８は沸騰検出装置であり、本体１に収納さ
れる内釜２と、本体１に取付けたセンサー３を内釜２に
密着し、かつ熱的に結合するものである。また本体１底
部に取付けたヒーター４は内釜２の底部と接し、内釜２
を加熱するものである。通電手段５は温度センサー３が
あらかじめ定めた一定温度Ｔ未満のときヒーター４へ通
電するものである。停止手段６は上記出力温度が一定温
度Ｔ以上のときヒーター４への通電を停止するものであ
る。無効手段７は停止手段６が動作してから一定時間θ
の計時を行い、この計時中温度センサー３の出力を無視
するようにするものである。沸騰検出装置８は無効手段
７があらかじめ定められた回数連続して動作した場合沸
騰とみなすものである。In the figure, 1 is a rice cooker body, 2 is an inner pot, 3 is a temperature sensor, 4 is a heater, 5 is an energizing means, 6 is a stopping means, and 7
Is an ineffective means, and 8 is a boiling detection device for closely contacting the inner pot 2 housed in the main body 1 and the sensor 3 attached to the main body 1 with the inner pot 2 and thermally coupling them. Further, the heater 4 attached to the bottom of the main body 1 contacts the bottom of the inner pot 2,
Is to heat. The energizing means 5 energizes the heater 4 when the temperature sensor 3 is below a predetermined temperature T. The stopping means 6 stops energization of the heater 4 when the output temperature is equal to or higher than the constant temperature T. The invalidating means 7 has a predetermined time θ after the stopping means 6 operates.
Is performed and the output of the temperature sensor 3 is ignored during the measurement. The boiling detection device 8 considers boiling when the invalidating means 7 is continuously operated a predetermined number of times.
上記構成からなる本実施例の動作を説明する。The operation of this embodiment having the above configuration will be described.
温度センサー３が一定温度Ｔ未満のときは通電手段５で
ヒーター４に通電し、内釜２を加熱する。一定温度Ｔ以
上になると、停止手段６により通電が停止され、無効手
段７で一定時間θの計時終了後の温度センサー３の出力
温度が取り込まれる。このとき一定温度Ｔ未満に下がっ
ていれば再び通電されるが、また一定温度Ｔ以上であれ
ば再び一定時間θの間通電が停止され、一定時間θ後の
温度センサー３の出力温度が取り込まれる。こうして一
定温度Ｔ以上か、未満かで次の動作を定める動作が繰り
返されるが、あらかじめ定められた回数（第３図では３
回と設定している）連続して無効手段７が動作したとき
沸騰検出装置８は沸騰とみなす出力を出す。（第２図、
第３図参照） ここで一定時間θの間温度センサー３の出力温度を無視
するのはチャタリングによる不安定な通電制御を防止す
るためである。即ち一定時間θを設けないで常時温度セ
ンサー３の出力温度を有効とすると、温度センサー３が
一定温度Ｔ未満からＴ以上に変わろとするとき、（Ｔ未
満）（Ｔ以上）が何度もめまぐるしく入れ換わる現象
（チャタリング）が生じ、これに伴い一定温度Ｔ未満な
ら通電手段５、一定温度Ｔ以上なら停止手段６というよ
うにヒーター４への通電が不安定（チャタリング）にな
るからである。When the temperature sensor 3 is lower than the constant temperature T, the energizing means 5 energizes the heater 4 to heat the inner pot 2. When the temperature becomes equal to or higher than the constant temperature T, the stopping means 6 stops the energization, and the invalidating means 7 takes in the output temperature of the temperature sensor 3 after the time measurement of the constant time θ. At this time, if the temperature is lower than the constant temperature T, the power is supplied again. If the temperature is higher than the constant temperature T, the power supply is stopped again for the constant time θ, and the output temperature of the temperature sensor 3 after the constant time θ is captured. . In this way, the operation for determining the next operation is repeated depending on whether the temperature is equal to or higher than the constant temperature T or lower than the constant temperature T.
When the invalidating means 7 is operated continuously, the boiling detection device 8 outputs the output regarded as boiling. (Fig. 2,
(See FIG. 3) Here, the reason why the output temperature of the temperature sensor 3 is ignored for a certain time θ is to prevent unstable energization control due to chattering. That is, if the output temperature of the temperature sensor 3 is always valid without providing the certain time θ, (less than T) (more than T) is swirling many times when the temperature sensor 3 is to change from less than the certain temperature T to more than T. This is because the phenomenon of switching (chattering) occurs, and accordingly, the energization of the heater 4 becomes unstable (chattering) such as the energizing means 5 if the temperature is lower than the constant temperature T and the stopping means 6 if the temperature is higher than the constant temperature T.
発明の効果 以上により本発明によれば、温度センサー１つで安価に
構成でき、かつ一定温度を略沸騰温度に設定しておけば
高精度に沸騰を検出できる炊飯器となる。EFFECTS OF THE INVENTION As described above, according to the present invention, a rice cooker which can be inexpensively configured with one temperature sensor and which can detect boiling with high accuracy by setting a constant temperature at substantially the boiling temperature.
第１図は本発明の一実施例を示す炊飯器の斜視図、第２
図は同炊飯器の動作フローチャート、第３図同炊飯器の
米温と温度センサーとの通電状態の相関図である。 ３……温度センサー、４……ヒーター、 ５……通電手段、６……停止手段、 ７……無効手段、８……沸騰検出装置、FIG. 1 is a perspective view of a rice cooker showing an embodiment of the present invention, and FIG.
FIG. 3 is an operation flowchart of the rice cooker, and FIG. 3 is a correlation diagram of a rice temperature of the rice cooker and an energized state of a temperature sensor. 3 ... Temperature sensor, 4 ... Heater, 5 ... Energizing means, 6 ... Stopping means, 7 ... Invalidating means, 8 ... Boiling detection device,
Claims (1)
と、本体に取付けられ、内釜に密着して熱的に結合する
温度センサーと、内釜を加熱するヒーターとを有する炊
飯器において、前記温度センサー（３）の出力温度があ
らかじめ定めた一定温度Ｔ未満のときはヒーター（４）
へ通電する通電手段（５）と、前記出力温度が一定温度
Ｔ以上のときはヒーター（４）への通電を停止する停止
手段（６）と、停止手段（６）が動作してから一定時間
θの計時を行い、この計時中は温度センサー（３）の出
力を無視する無効手段（７）と、無効手段（７）があら
かじめ定められた回数連続して動作した場合沸騰とみな
す沸騰検出装置（８）を設けたことを特徴とする炊飯
器。1. A rice cooker having a main body, an inner pot removably housed in the main body, a temperature sensor attached to the main unit, which is in close contact with the inner pot and is thermally coupled, and a heater for heating the inner pot. In the heater, when the output temperature of the temperature sensor (3) is lower than a predetermined constant temperature T, the heater (4)
An energizing means (5) for energizing, a stopping means (6) for stopping energizing the heater (4) when the output temperature is equal to or higher than a constant temperature T, and a fixed time after the stopping means (6) operates. θ is measured, and during this time, the invalidating means (7) that ignores the output of the temperature sensor (3) and the boiling detection device that considers it as boiling when the invalidating means (7) continuously operate for a predetermined number of times (8) is provided, The rice cooker characterized by the above-mentioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19935486A JPH0738827B2 (en) | 1986-08-26 | 1986-08-26 | rice cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19935486A JPH0738827B2 (en) | 1986-08-26 | 1986-08-26 | rice cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6354123A JPS6354123A (en) | 1988-03-08 |
| JPH0738827B2 true JPH0738827B2 (en) | 1995-05-01 |
Family
ID=16406363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19935486A Expired - Fee Related JPH0738827B2 (en) | 1986-08-26 | 1986-08-26 | rice cooker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0738827B2 (en) |
-
1986
- 1986-08-26 JP JP19935486A patent/JPH0738827B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6354123A (en) | 1988-03-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |