JP2020192170A - Gas rice cooker - Google Patents

Gas rice cooker Download PDF

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JP2020192170A
JP2020192170A JP2019100535A JP2019100535A JP2020192170A JP 2020192170 A JP2020192170 A JP 2020192170A JP 2019100535 A JP2019100535 A JP 2019100535A JP 2019100535 A JP2019100535 A JP 2019100535A JP 2020192170 A JP2020192170 A JP 2020192170A
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rice cooker
rice
burner
temperature
boiling
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JP7248291B2 (en
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義生 鈴木
Yoshio Suzuki
義生 鈴木
宏行 恒光
Hiroyuki Tsunemitsu
宏行 恒光
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Paloma Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

To prevent rice from being cooked hard and to cook it excellently even when a rice quantity charged in a rice cooking pot is small.SOLUTION: In a gas rice cooker, a controller determines whether a rice quantity charged in a rice cooking pot is prescribed quantity or less in a first step from rice cooking start to boiling on the basis of a temperature rise tendency in the rice cooking pot obtained by a lid thermistor, and temporarily fires a burner with small heating power (time t3 to t4) when temperature in the rice cooking pot reaches 45°C (time t1) lower than boiling temperature in the case that the quantity is determined to be the prescribed quantity or less.SELECTED DRAWING: Figure 3

Description

本発明は、バーナを加熱源としたガス炊飯器に関する。 The present invention relates to a gas cooker using a burner as a heating source.

ガス炊飯器においては、特許文献１に開示されるように、所定の炊飯プログラムに基づいてコントローラがバーナの燃焼を制御して一連の炊飯工程を実施可能となっている。まず、炊飯が開始されるとバーナが強火で燃焼する第１工程が行われ、釜内温度の沸騰が検知されると、火力が弱火に変更されて沸騰が維持される第２工程となる。水の蒸発が進んで釜内温度が上昇すると、火力が強火に変更されてドライアップが行われ、その後、バーナが消火されて蒸らしが行われる。 In a gas rice cooker, as disclosed in Patent Document 1, a controller can control the combustion of a burner based on a predetermined rice cooking program to carry out a series of rice cooking processes. First, when rice cooking is started, the first step of burning the burner over high heat is performed, and when boiling of the temperature inside the kettle is detected, the heating power is changed to low heat and the boiling is maintained in the second step. When the water evaporates and the temperature inside the kettle rises, the heating power is changed to high heat and dry-up is performed, and then the burner is extinguished and steamed.

特開２００８−３６２４９号公報Japanese Unexamined Patent Publication No. 2008-36249

一般に、炊飯を行う場合、第１工程では、４０℃前後の吸水温度から沸騰する時間を８〜１５分程度とするのが好ましいとされている。８分未満だと米内部への熱の入りが不十分になって堅い炊き上がりになりやすく、逆に１５分を越えると米内部への熱の入りが過剰になって歯ごたえが悪くなり、米粒の周囲のネバが焦げ付いて悪臭が生じるからである。
しかし、特許文献１のようなガス炊飯器では、バーナの火力が大きいため、第１工程で沸騰までに時間が掛かりすぎる問題は生じないが、炊飯釜に投入された米の量が１〜２合等の少量の場合は沸騰までの時間が過小となり、堅い炊き上がりになるおそれがある。 Generally, when cooking rice, it is preferable that the boiling time from the water absorption temperature of about 40 ° C. is about 8 to 15 minutes in the first step. If it is less than 8 minutes, the heat inside the rice will be insufficient and it will be easy to cook hard, and if it is over 15 minutes, the heat will be excessive inside the rice and the texture will be poor, and the rice grains will be hard. This is because the rice around the rice is burnt and gives off a foul odor.
However, in a gas rice cooker as in Patent Document 1, since the burning power of the burner is large, there is no problem that it takes too long to boil in the first step, but the amount of rice put into the rice cooker is 1-2. In the case of a small amount such as rice, the time to boil is too short, and there is a risk that the rice will be cooked hard.

そこで、本発明は、炊飯釜に投入された米の量が少量であっても、堅い炊き上がりとなることを防止して良好な炊き上がりが得られるガス炊飯器を提供することを目的としたものである。 Therefore, an object of the present invention is to provide a gas cooker that can prevent a hard cooked rice and obtain a good cooked rice even if the amount of rice put into the rice cooker is small. It is a thing.

上記目的を達成するために、請求項１に記載の発明は、炊飯釜と、炊飯釜を加熱するバーナと、バーナの火力を大小２段階に切り替え可能な切替手段と、炊飯釜内の温度を検出する温度検出手段と、バーナ及び切替手段をそれぞれ制御して、炊飯開始から炊飯釜内の沸騰が検知されるまでバーナを大火力で燃焼させる第１工程と、炊飯釜内の沸騰検知後はバーナを大火力と小火力とに繰り返し切り替えて沸騰状態を維持させる第２工程とを実行可能な制御手段と、を含んでなるガス炊飯器であって、
制御手段は、第１工程において、温度検出手段により得られる炊飯釜内の温度の上昇傾向に基づいて、炊飯釜内に投入された米の量が所定量以下であるか否かを判定し、所定量以下と判定した場合は、炊飯釜内の温度が沸騰温度よりも低い所定温度に達すると、バーナを一時的に小火力で燃焼させることを特徴とする。
請求項２に記載の発明は、請求項１の構成において、第１工程は、炊飯開始後に炊飯釜内の温度が所定温度に達すると、バーナの燃焼を所定時間停止させ、その後燃焼を再開させる制御を含み、制御手段は、米の量が所定量以下と判定した場合には、バーナの燃焼を再開させた後にバーナを一時的に小火力で燃焼させることを特徴とする。
請求項３に記載の発明は、請求項１又は２の構成において、炊飯釜を開閉する蓋体を備えると共に、蓋体には蓋ヒータが設けられ、制御手段は、炊飯釜内の沸騰が検知されると蓋ヒータを作動させることを特徴とする。
請求項４に記載の発明は、請求項１乃至３の何れかの構成において、炊飯釜を保温するための釜ヒータが設けられ、制御手段は、炊飯釜内の沸騰が検知された後、炊飯釜内の温度が所定のドライアップ温度まで上昇すると、バーナの燃焼を停止させて釜ヒータを作動させることを特徴とする。 In order to achieve the above object, the invention according to claim 1 is to use a rice cooker, a burner for heating the rice cooker, a switching means for switching the heating power of the burner in two stages, and a temperature inside the rice cooker. The first step of controlling the temperature detecting means to detect, the burner and the switching means to burn the burner with a large heat from the start of rice cooking until the boiling in the rice cooker is detected, and after the boiling in the rice cooker is detected A gas cooker comprising a control means capable of performing a second step of repeatedly switching a burner between a large heat and a small heat to maintain a boiling state.
In the first step, the control means determines whether or not the amount of rice put into the rice cooker is equal to or less than a predetermined amount based on the tendency of the temperature in the rice cooker to rise obtained by the temperature detecting means. When it is determined that the amount is equal to or less than the predetermined amount, the burner is temporarily burned with a small heat when the temperature in the rice cooker reaches a predetermined temperature lower than the boiling temperature.
According to the second aspect of the present invention, in the configuration of the first aspect, in the first step, when the temperature in the rice cooker reaches a predetermined temperature after the start of rice cooking, the burning of the burner is stopped for a predetermined time and then the combustion is restarted. The control means, including control, is characterized in that when the amount of rice is determined to be less than or equal to a predetermined amount, the burner is temporarily burned with a small amount of heat after the burning of the burner is restarted.
The invention according to claim 3 includes a lid for opening and closing the rice cooker in the configuration of claim 1 or 2, and a lid heater is provided on the lid, and the control means detects boiling in the rice cooker. When it is done, the lid heater is activated.
In the invention according to claim 4, in any of the configurations of claims 1 to 3, a kettle heater for keeping the rice cooker warm is provided, and the control means cooks rice after boiling in the rice cooker is detected. When the temperature inside the kettle rises to a predetermined dry-up temperature, the burning of the burner is stopped and the kettle heater is operated.

請求項１に記載の発明によれば、制御手段は、第１工程において炊飯釜内に投入された米の量が所定量以下と判定した場合は、沸騰温度よりも低い所定温度に達するとバーナを一時的に小火力で燃焼させる。よって、炊飯釜に投入された米の量が少量であっても、沸騰に至るまでの時間を稼ぐことができ、堅い炊き上がりとなることを防止して良好な炊き上がりが得られる。また、基本的には大火力でバーナが燃焼するため、沸騰までに時間が掛かりすぎるのを防止できると共に、火力の切替に伴う作動音が生じる頻度も減らすことができる。
請求項２に記載の発明によれば、請求項１の効果に加えて、制御手段は、米の量が所定量以下と判定した場合には、燃焼停止後バーナの燃焼を再開させた後にバーナを一時的に小火力で燃焼させるので、吸水工程を含む場合でも沸騰までの時間を稼ぐことができ、堅い炊き上がりになるのを防止可能となる。
請求項３に記載の発明によれば、請求項１又は２の効果に加えて、制御手段は、炊飯釜内の沸騰が検知されると蓋ヒータを作動させるので、沸騰により生じた水蒸気が蓋体の内側で結露することを防止できる。このため、結露水が炊飯釜内に滴下して米に付着することによる米のべたつきを防止可能となる。
請求項４に記載の発明によれば、請求項１乃至３の何れかの効果に加えて、制御手段は、炊飯釜内の沸騰が検知された後、炊飯釜内の温度がドライアップ温度まで上昇すると、バーナの燃焼を停止させて釜ヒータを作動させるので、バーナの燃焼を停止させた後の炊飯釜内に温度差が生じにくくなり、好適な状態で蒸らし工程を実行することができる。 According to the invention of claim 1, when the control means determines that the amount of rice put into the rice cooker in the first step is equal to or less than a predetermined amount, the control means burners when the temperature reaches a predetermined temperature lower than the boiling temperature. Is temporarily burned with a small amount of heat. Therefore, even if the amount of rice put into the rice cooker is small, it is possible to gain time until boiling, and it is possible to prevent the rice from being cooked hard and to obtain a good cooked rice. In addition, since the burner is basically burned with a large amount of heat, it is possible to prevent it from taking too long to boil, and it is also possible to reduce the frequency of operation noise caused by switching the heat.
According to the invention of claim 2, in addition to the effect of claim 1, when the control means determines that the amount of rice is equal to or less than a predetermined amount, the burner is restarted after the combustion is stopped and then the burner is restarted. Is temporarily burned with a small amount of heat, so even if a water absorption process is included, it is possible to gain time until boiling, and it is possible to prevent a hard cooking.
According to the invention of claim 3, in addition to the effect of claim 1 or 2, the control means activates the lid heater when boiling in the rice cooker is detected, so that the steam generated by boiling covers the lid. It is possible to prevent dew condensation inside the body. Therefore, it is possible to prevent the rice from becoming sticky due to the dew condensation water dripping into the rice cooker and adhering to the rice.
According to the invention of claim 4, in addition to the effect of any one of claims 1 to 3, the control means causes the temperature in the rice cooker to reach the dry-up temperature after the boiling in the rice cooker is detected. When the temperature rises, the burning of the burner is stopped and the kettle heater is operated, so that a temperature difference is less likely to occur in the rice cooking kettle after the burning of the burner is stopped, and the steaming step can be executed in a suitable state.

ガス炊飯器の斜視図である。It is a perspective view of a gas cooker. ガス炊飯器の構成の概略図である。It is a schematic diagram of the structure of a gas cooker. 炊飯工程の説明図である。It is explanatory drawing of the rice cooking process.

以下、本発明の実施の形態を図面に基づいて説明する。
図１は、ガス炊飯器の一例を示す斜視図、図２は概略図である。
ガス炊飯器１は、上部を開口した本体２と、本体２の上部開口を開閉する蓋体３とを備え、本体２の正面下部には、調理メニューの選択やタイマー炊飯等を行うための操作パネル４が備えられている。本体２には、外部のホースが接続されるガス管５と、図示しない電源コードとが設けられている。
本体２内には、上部を開口する炊飯釜６が着脱可能に収容され、蓋体３には、本体２の閉塞状態で炊飯釜６の上部開口を開閉する内蓋７が設けられている。
また、本体２内には、炊飯釜６を下方から加熱するバーナ８と、炊飯釜６の下部領域を加熱する釜ヒータ９とが設けられ、蓋体３内には、内蓋７の上面に接触する蓋ヒータ１０が設けられている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an example of a gas cooker, and FIG. 2 is a schematic view.
The gas cooker 1 includes a main body 2 having an upper opening and a lid 3 for opening and closing the upper opening of the main body 2, and an operation for selecting a cooking menu, timer rice cooking, etc. is performed on the lower front surface of the main body 2. A panel 4 is provided. The main body 2 is provided with a gas pipe 5 to which an external hose is connected and a power cord (not shown).
A rice cooker 6 having an upper opening is detachably housed in the main body 2, and an inner lid 7 for opening and closing the upper opening of the rice cooker 6 is provided in the lid 3 in a closed state of the main body 2.
Further, in the main body 2, a burner 8 for heating the rice cooker 6 from below and a pot heater 9 for heating the lower region of the rice cooker 6 are provided, and in the lid 3, on the upper surface of the inner lid 7. A lid heater 10 that comes into contact is provided.

一方、ガス管５には、ガス管５を開閉する元電磁弁１１が設けられ、元電磁弁１１の下流側で分岐された分岐路には、各分岐路を開閉する第１電磁弁１２と第２電磁弁１３とがそれぞれ設けられて、火力を大小２段階に変更可能な切替手段を構成している。
また、本体２内には、炊飯釜６の底面中央部に当接して炊飯釜６の底部の温度を検出する釜サーミスタ１４が設けられ、蓋体３内には、内蓋７の上面に当接して炊飯釜６内の温度を検出する蓋サーミスタ１５が設けられて、各サーミスタ１４，１５の検出信号がコントローラ２０へ入力可能となっている。 On the other hand, the gas pipe 5 is provided with a main solenoid valve 11 for opening and closing the gas pipe 5, and a branch path branched on the downstream side of the main solenoid valve 11 is provided with a first solenoid valve 12 for opening and closing each branch path. A second solenoid valve 13 is provided for each, and constitutes a switching means capable of changing the thermal power in two stages, large and small.
Further, in the main body 2, a kettle thermista 14 is provided that abuts on the central portion of the bottom surface of the rice cooker 6 to detect the temperature of the bottom portion of the rice cooker 6, and in the lid 3, the upper surface of the inner lid 7 is contacted. A lid thermista 15 that comes into contact with the rice cooker 6 to detect the temperature inside the rice cooker 6 is provided, and the detection signals of the thermistas 14 and 15 can be input to the controller 20.

コントローラ２０は、炊飯釜６及びバーナ８の下方に設置されて、元電磁弁１１及び第１、第２電磁弁１２，１３の開閉制御及びバーナ８の点火制御を行う。このコントローラ２０には、ＣＰＵを用いて各種演算処理を行う演算部２１と、ＲＯＭやＲＡＭ、ＥＥＰＲＯＭ等を用いて調理プログラム等を保存した記憶部２２と、水晶発振器を備えて水晶発振器からのクロックカウント数を積算することで現在時刻を計時する計時部２３と、図示しないバッテリ等とが設けられて、操作パネル４と電気的に接続されている。 The controller 20 is installed below the rice cooker 6 and the burner 8 to control the opening / closing of the main solenoid valve 11 and the first and second solenoid valves 12 and 13 and the ignition control of the burner 8. The controller 20 includes a calculation unit 21 that performs various calculation processes using a CPU, a storage unit 22 that stores cooking programs and the like using ROM, RAM, EEPROM, and the like, and a clock from the crystal oscillator. A time measuring unit 23 that measures the current time by integrating the number of counts, a battery (not shown), and the like are provided and are electrically connected to the operation panel 4.

操作パネル４には、７セグメントディスプレイからなる表示画面２５と、ケーキ調理やおかゆ調理等の通常の炊飯以外の調理メニューを選択するメニューボタン２６、保温の有無を切り替える保温ボタン２７、タイマー炊飯等のタイマー調理や現在時刻を設定する時刻設定ボタン２８、タイマー炊飯等を予約する予約ボタン２９、調理を開始するスタートボタン３０、各ボタンで入力したメニュー等を取り消す取消ボタン３１がそれぞれ設けられている。
よって、コントローラ２０は、操作パネル４の操作で調理メニューが選択されてスタートボタン３０がＯＮ操作されると、調理メニューに対応した調理プログラムに基づき、釜サーミスタ１４及び蓋サーミスタ１５によって検出される検出温度を監視して、各電磁弁１１〜１３を開閉してバーナ８の燃焼を制御すると共に、釜ヒータ９及び蓋ヒータ１０の通電を制御して、選択された調理を行う。 The operation panel 4 has a display screen 25 consisting of a 7-segment display, a menu button 26 for selecting a cooking menu other than normal rice cooking such as cake cooking and rice cooking, a heat retention button 27 for switching the presence or absence of heat retention, timer rice cooking, etc. A time setting button 28 for setting timer cooking and the current time, a reservation button 29 for reserving timer rice cooking and the like, a start button 30 for starting cooking, and a cancel button 31 for canceling a menu or the like input by each button are provided.
Therefore, when the cooking menu is selected by the operation of the operation panel 4 and the start button 30 is turned on, the controller 20 detects the detection by the kettle thermista 14 and the lid thermista 15 based on the cooking program corresponding to the cooking menu. By monitoring the temperature, the electromagnetic valves 11 to 13 are opened and closed to control the combustion of the burner 8, and the energization of the kettle heater 9 and the lid heater 10 is controlled to perform the selected cooking.

以上の如く構成されたガス炊飯器１における炊飯工程を、図３に基づいて説明する。
まず、スタートボタン３０を押し操作すると（時間ｔ０）、コントローラ２０は、元電磁弁１１に加えて第１電磁弁１２及び第２電磁弁１３を開弁させてバーナ８を大火力で燃焼させる。ここでは蓋サーミスタ１５の検出温度を監視しており、大火力による炊飯釜６内の加熱で蓋サーミスタ１５の検出温度は連続的に上昇する。
このとき、コントローラ２０では、検出温度の上昇傾向に基づいて、炊飯釜６内に投入された米の量（炊飯量）が所定量（例えば１〜２合）以下か否かを判定する。これは検出温度が所定温度上昇（ここでは４０℃〜４３℃）するのに要する時間を予め設定された閾値と比較して判定を行う。但し、この判定は、検出温度の上昇勾配を比較する他の方法で行ってもよいし、異なる温度帯で複数回判定を行って一定回数以上で所定量以下と判定した場合を判定結果としてもよい。 The rice cooking process in the gas cooker 1 configured as described above will be described with reference to FIG.
First, when the start button 30 is pressed (time t0), the controller 20 opens the first solenoid valve 12 and the second solenoid valve 13 in addition to the main solenoid valve 11 to burn the burner 8 with a large amount of heat. Here, the detection temperature of the lid thermistor 15 is monitored, and the detection temperature of the lid thermistor 15 continuously rises by heating the inside of the rice cooker 6 with a large heat.
At this time, the controller 20 determines whether or not the amount of rice (rice cooked amount) put into the rice cooker 6 is equal to or less than a predetermined amount (for example, 1 to 2 go) based on the tendency of the detection temperature to rise. This is determined by comparing the time required for the detection temperature to rise to a predetermined temperature (here, 40 ° C. to 43 ° C.) with a preset threshold value. However, this determination may be performed by another method of comparing the rising gradients of the detected temperatures, or may be determined as a determination result when the determination is performed a plurality of times in different temperature zones and the determination is made to be a predetermined amount or less after a certain number of times. Good.

米の量を判定した後、コントローラ２０は、蓋サーミスタ１５の検出温度が４５℃に達したら（時間ｔ１）、バーナ８の燃焼を所定時間Ｔ１（数分間）停止させる。よって、蓋サーミスタ１５の検出温度は略横ばいとなり、炊飯釜６内では米への吸水が促進されることになる。
燃焼停止の所定時間Ｔ１が経過すると（時間ｔ２）、コントローラ２０は、再びバーナ８を大火力で燃焼させる。そして、先の判定で米の量が所定量以下であれば、バーナ８の火力を小火力に切り替えて（時間ｔ３）、そのまま所定時間Ｔ２（数分）燃焼させる。所定時間Ｔ２が経過すると（時間ｔ４）、バーナ８を再び大火力に切り替える。
その後、蓋サーミスタ１５の検出温度によって沸騰を検知すると（時間ｔ５）、コントローラ２０は蓋ヒータ１０を作動させる。これは、内蓋７に付いた水蒸気を蒸発させるためである。
ここまでの時間ｔ０ーｔ５までが第１工程となる。 After determining the amount of rice, the controller 20 stops the burning of the burner 8 for a predetermined time T1 (several minutes) when the detection temperature of the lid thermistor 15 reaches 45 ° C. (time t1). Therefore, the detection temperature of the lid thermistor 15 becomes substantially flat, and water absorption into the rice is promoted in the rice cooker 6.
When the predetermined time T1 of the combustion stop elapses (time t2), the controller 20 burns the burner 8 again with a large thermal power. Then, if the amount of rice is equal to or less than the predetermined amount in the above determination, the thermal power of the burner 8 is switched to the small thermal power (time t3), and the rice is burned as it is for a predetermined time T2 (several minutes). When the predetermined time T2 elapses (time t4), the burner 8 is switched to the large thermal power again.
After that, when boiling is detected by the detection temperature of the lid thermistor 15 (time t5), the controller 20 operates the lid heater 10. This is to evaporate the water vapor attached to the inner lid 7.
The time up to this point t0 to t5 is the first step.

沸騰検知後、コントローラ２０は、釜サーミスタ１４の検出温度に基づいて制御を行う。ここではバーナ８の火力を大火力と小火力とに繰り返し切り替えて、沸騰状態を維持して水の蒸発を促進させる。
そして、蓋サーミスタ１５の検出温度が沸騰温度よりも高いドライアップ温度に達すると（時間ｔ６）、コントローラ２０は、バーナ８の燃焼を停止させて釜ヒータ９を作動させる。これは、釜内温度の均一化を図るためである。ここまでの時間ｔ５−ｔ６が第２工程となる。 After the boiling is detected, the controller 20 controls based on the detected temperature of the kettle thermistor 14. Here, the thermal power of the burner 8 is repeatedly switched between a large thermal power and a small thermal power to maintain the boiling state and promote the evaporation of water.
Then, when the detection temperature of the lid thermistor 15 reaches a dry-up temperature higher than the boiling temperature (time t6), the controller 20 stops the combustion of the burner 8 and operates the kettle heater 9. This is to make the temperature inside the pot uniform. The time t5-t6 up to this point is the second step.

ドライアップ後は蒸らし工程となり、蓋サーミスタ１５の検出温度が沸騰温度よりも低い所定温度まで下降すると（時間ｔ７）、コントローラ２０は、バーナ８を再び小火力（但し、着火時のみ大火力）で燃焼させ、沸騰温度を越えたら燃焼を停止させる（時間ｔ８）。
そして、設定された炊飯終了時間ｔ９になると、コントローラ２０は、釜ヒータ９と蓋ヒータ１０との作動を停止させてブザー等によって報知を行う。
なお、第１工程において米の量が所定量以下と判定されなかった場合、コントローラ２０は、時間ｔ３−ｔ４でのバーナ８の小火力での燃焼を行わず、時間ｔ２から沸騰まで大火力で燃焼させることになる。 After the dry-up, a steaming process is performed, and when the detection temperature of the lid thermistor 15 drops to a predetermined temperature lower than the boiling temperature (time t7), the controller 20 again lowers the burner 8 with a small heat (however, a large heat only at the time of ignition). It is burned, and when the boiling temperature is exceeded, the combustion is stopped (time t8).
Then, when the set rice cooking end time t9 is reached, the controller 20 stops the operation of the pot heater 9 and the lid heater 10 and notifies by a buzzer or the like.
If the amount of rice is not determined to be less than or equal to the predetermined amount in the first step, the controller 20 does not burn the burner 8 with a small heat at time t3-t4, but with a large heat from time t2 to boiling. It will be burned.

このように、上記形態のガス炊飯器１によれば、コントローラ２０（制御手段）は、第１工程において、蓋サーミスタ１５（温度検出手段）により得られる炊飯釜６内の温度の上昇傾向に基づいて、炊飯釜６内に投入された米の量が所定量以下であるか否かを判定し、所定量以下と判定した場合は、炊飯釜６内の温度が沸騰温度よりも低い４５℃（所定温度）に達すると、バーナ８を一時的（時間ｔ３−ｔ４）に小火力で燃焼させるようにしている。
これにより、炊飯釜６に投入された米の量が少量であっても、沸騰に至るまでの時間を稼ぐことができ、堅い炊き上がりとなることを防止して良好な炊き上がりが得られる。また、基本的には大火力でバーナ８が燃焼するため、沸騰までに時間が掛かりすぎるのを防止できると共に、火力の切替に伴う作動音が生じる頻度も減らすことができる。 As described above, according to the gas cooker 1 of the above-described embodiment, the controller 20 (control means) is based on the tendency of the temperature in the rice cooker 6 obtained by the lid thermista 15 (temperature detecting means) to rise in the first step. Then, it is determined whether or not the amount of rice put into the rice cooker 6 is less than or equal to the predetermined amount, and if it is determined that the amount is less than or equal to the predetermined amount, the temperature inside the rice cooker 6 is 45 ° C., which is lower than the boiling temperature ( When the temperature reaches a predetermined temperature), the burner 8 is temporarily burned with a small heat (time t3-t4).
As a result, even if the amount of rice put into the rice cooker 6 is small, it is possible to gain time until boiling, and it is possible to prevent the rice from being cooked hard and to obtain a good cooked rice. Further, since the burner 8 is basically burned with a large amount of heat, it is possible to prevent it from taking too much time to boil, and it is also possible to reduce the frequency of operation noise caused by switching the heat.

特にここでは、コントローラ２０は、米の量が所定量以下と判定した場合には、時間ｔ１−ｔ２の燃焼停止後、バーナ８の燃焼を再開させた後にバーナ８を一時的に小火力で燃焼させるようにしているので、吸水工程を含む場合でも沸騰までの時間を稼ぐことができ、堅い炊き上がりになるのを防止可能となる。
また、コントローラ２０は、炊飯釜６内の沸騰が検知されると蓋ヒータ１０を作動させるので、沸騰により生じた水蒸気が内蓋７の内側で結露することを防止できる。このため、結露水が炊飯釜６内に滴下して米に付着することによる米のべたつきを防止可能となる。
さらに、コントローラ２０は、炊飯釜６内の沸騰が検知された後、炊飯釜６内の温度が所定のドライアップ温度まで上昇すると、バーナ８の燃焼を停止させて釜ヒータ９を作動させるので、バーナ８の燃焼を停止させた後の炊飯釜６内に温度差が生じにくくなり、好適な状態で蒸らし工程を実行することができる。 In particular, here, when the controller 20 determines that the amount of rice is equal to or less than a predetermined amount, the controller 20 temporarily burns the burner 8 with a small amount of heat after stopping the combustion for time t1-t2 and restarting the combustion of the burner 8. Since it is designed to be made to boil, it is possible to gain time until boiling even when the water absorption process is included, and it is possible to prevent a hard cooking.
Further, since the controller 20 operates the lid heater 10 when the boiling in the rice cooker 6 is detected, it is possible to prevent the steam generated by the boiling from condensing inside the inner lid 7. Therefore, it is possible to prevent the rice from becoming sticky due to the dew condensation water dripping into the rice cooker 6 and adhering to the rice.
Further, when the temperature in the rice cooker 6 rises to a predetermined dry-up temperature after the boiling in the rice cooker 6 is detected, the controller 20 stops the combustion of the burner 8 and operates the kettle heater 9. After the combustion of the burner 8 is stopped, the temperature difference is less likely to occur in the rice cooker 6, and the steaming step can be executed in a suitable state.

なお、上記形態では、第１工程におけるバーナの一時的な小火力燃焼を所定時間で連続的に行っているが、沸騰までの時間稼ぎが可能であれば、短い時間で断続的に小火力燃焼を複数回行ってもよい。制御に係る各時間や温度の設定も上記形態に限らず、適宜変更可能である。
また、第１工程においては、バーナの燃焼を所定時間停止させて吸水を促進させる制御を行っているが、米の量が所定量以下の場合は当該制御を省略してもよいし、米の量にかかわらず省略してもよい。
さらに、蓋ヒータと釜ヒータとの一方又は双方を省略して、沸騰後の結露水の低下防止や蒸らし工程での温度の均一化を行わない制御としてもよい。 In the above embodiment, the temporary small thermal power combustion of the burner in the first step is continuously performed in a predetermined time, but if it is possible to gain time until boiling, the small thermal power combustion is intermittently performed in a short time. May be performed multiple times. The setting of each time and temperature related to the control is not limited to the above mode, and can be changed as appropriate.
Further, in the first step, the burning of the burner is stopped for a predetermined time to promote water absorption, but if the amount of rice is less than the predetermined amount, the control may be omitted, or the rice may be omitted. It may be omitted regardless of the amount.
Further, one or both of the lid heater and the kettle heater may be omitted to prevent the dew condensation water from dropping after boiling and to prevent the temperature from being made uniform in the steaming step.

１・・ガス炊飯器、２・・本体、３・・蓋体、４・・操作パネル、５・・ガス管。６・・炊飯釜、７・・内蓋、８・・バーナ、１１・・元電磁弁、１２・・第１電磁弁、１３・・第２電磁弁、１４・・釜サーミスタ、１５・・蓋サーミスタ、２０・・コントローラ、２１・・演算部、２２・・記憶部、２３・・計時部、２５・・表示画面。 1 ... Gas rice cooker, 2 ... Main body, 3 ... Lid, 4 ... Operation panel, 5 ... Gas pipe. 6 ... Rice cooker, 7 ... Inner lid, 8 ... Burner, 11 ... Former solenoid valve, 12 ... 1st solenoid valve, 13 ... 2nd solenoid valve, 14 ... Pot thermistor, 15 ... Lid Thermistor, 20 ... controller, 21 ... calculation unit, 22 ... storage unit, 23 ... timing unit, 25 ... display screen.

Claims (4)

炊飯釜と、
前記炊飯釜を加熱するバーナと、
前記バーナの火力を大小２段階に切り替え可能な切替手段と、
前記炊飯釜内の温度を検出する温度検出手段と、
前記バーナ及び前記切替手段をそれぞれ制御して、炊飯開始から前記炊飯釜内の沸騰が検知されるまで前記バーナを大火力で燃焼させる第１工程と、前記炊飯釜内の沸騰検知後は前記バーナを大火力と小火力とに繰り返し切り替えて沸騰状態を維持させる第２工程とを実行可能な制御手段と、を含んでなるガス炊飯器であって、
前記制御手段は、前記第１工程において、前記温度検出手段により得られる前記炊飯釜内の温度の上昇傾向に基づいて、前記炊飯釜内に投入された米の量が所定量以下であるか否かを判定し、前記所定量以下と判定した場合は、前記炊飯釜内の温度が沸騰温度よりも低い所定温度に達すると、前記バーナを一時的に小火力で燃焼させることを特徴とするガス炊飯器。 With a rice cooker
A burner that heats the rice cooker and
A switching means that can switch the thermal power of the burner in two stages, large and small,
A temperature detecting means for detecting the temperature inside the rice cooker, and
The first step of controlling the burner and the switching means to burn the burner with a large heat from the start of rice cooking until the boiling in the rice cooker is detected, and after the boiling in the rice cooker is detected, the burner A gas cooker comprising a control means capable of performing a second step of repeatedly switching between a large heat and a small heat to maintain a boiling state.
In the first step, the control means determines whether or not the amount of rice put into the rice cooker is equal to or less than a predetermined amount based on the tendency of the temperature in the rice cooker to rise obtained by the temperature detecting means. When the temperature in the rice cooker reaches a predetermined temperature lower than the boiling temperature, the gas is characterized by temporarily burning the burner with a small amount of heat. rice cooker. 前記第１工程は、炊飯開始後に前記炊飯釜内の温度が前記所定温度に達すると、前記バーナの燃焼を所定時間停止させ、その後燃焼を再開させる制御を含み、
前記制御手段は、米の量が前記所定量以下と判定した場合には、前記バーナの燃焼を再開させた後に前記バーナを一時的に小火力で燃焼させることを特徴とする請求項１に記載のガス炊飯器。 The first step includes control of stopping the combustion of the burner for a predetermined time and then restarting the combustion when the temperature in the rice cooker reaches the predetermined temperature after the start of rice cooking.
The control means according to claim 1, wherein when it is determined that the amount of rice is equal to or less than the predetermined amount, the burner is temporarily burned with a small heat after restarting the burning of the burner. Gas rice cooker. 前記炊飯釜を開閉する蓋体を備えると共に、前記蓋体には蓋ヒータが設けられ、
前記制御手段は、前記炊飯釜内の沸騰が検知されると前記蓋ヒータを作動させることを特徴とする請求項１又は２に記載のガス炊飯器。 A lid for opening and closing the rice cooker is provided, and a lid heater is provided on the lid.
The gas rice cooker according to claim 1 or 2, wherein the control means operates the lid heater when boiling in the rice cooker is detected. 前記炊飯釜を保温するための釜ヒータが設けられ、前記制御手段は、前記炊飯釜内の沸騰が検知された後、前記炊飯釜内の温度が所定のドライアップ温度まで上昇すると、前記バーナの燃焼を停止させて前記釜ヒータを作動させることを特徴とする請求項１乃至３の何れかに記載のガス炊飯器。 A kettle heater for keeping the rice cooker warm is provided, and when the temperature in the rice cooker rises to a predetermined dry-up temperature after the boiling in the rice cooker is detected, the control means of the burner The gas rice cooker according to any one of claims 1 to 3, wherein the kettle heater is operated by stopping the combustion.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0937936A (en) * 1995-07-26 1997-02-10 Paloma Ind Ltd Rice cooker
JPH1085127A (en) * 1996-09-17 1998-04-07 Paloma Ind Ltd Rice cooker
JPH1085129A (en) * 1996-09-18 1998-04-07 Paloma Ind Ltd Rice cooker
JPH10192139A (en) * 1996-12-29 1998-07-28 Tokyo Gas Co Ltd Rice cooker
JPH10304831A (en) * 1997-03-03 1998-11-17 Osaka Gas Co Ltd Rice cooking and rice cooker
JPH10327781A (en) * 1997-06-02 1998-12-15 Osaka Gas Co Ltd Rice cooking and rice cooker
JP2003225158A (en) * 2002-02-04 2003-08-12 Osaka Gas Co Ltd Rice cooker
JP2005207695A (en) * 2004-01-26 2005-08-04 Matsushita Electric Ind Co Ltd Automatic heating cooker and its program

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0937936A (en) * 1995-07-26 1997-02-10 Paloma Ind Ltd Rice cooker
JPH1085127A (en) * 1996-09-17 1998-04-07 Paloma Ind Ltd Rice cooker
JPH1085129A (en) * 1996-09-18 1998-04-07 Paloma Ind Ltd Rice cooker
JPH10192139A (en) * 1996-12-29 1998-07-28 Tokyo Gas Co Ltd Rice cooker
JPH10304831A (en) * 1997-03-03 1998-11-17 Osaka Gas Co Ltd Rice cooking and rice cooker
JPH10327781A (en) * 1997-06-02 1998-12-15 Osaka Gas Co Ltd Rice cooking and rice cooker
JP2003225158A (en) * 2002-02-04 2003-08-12 Osaka Gas Co Ltd Rice cooker
JP2005207695A (en) * 2004-01-26 2005-08-04 Matsushita Electric Ind Co Ltd Automatic heating cooker and its program

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