JPH0231472B2 - - Google Patents
Info
- Publication number
- JPH0231472B2 JPH0231472B2 JP57159325A JP15932582A JPH0231472B2 JP H0231472 B2 JPH0231472 B2 JP H0231472B2 JP 57159325 A JP57159325 A JP 57159325A JP 15932582 A JP15932582 A JP 15932582A JP H0231472 B2 JPH0231472 B2 JP H0231472B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic material
- khz
- heating
- heating coil
- cooking pot
- 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 - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 46
- 239000000696 magnetic material Substances 0.000 claims description 27
- 230000005674 electromagnetic induction Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 2
- 238000010411 cooking Methods 0.000 description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 230000010355 oscillation Effects 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002500 effect on skin Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
- H05B2213/05—Heating plates with pan detection means
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Cookers (AREA)
- General Induction Heating (AREA)
- Induction Heating Cooking Devices (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、高周波磁界による電磁誘導作用で被
加熱物を加熱する電磁誘導調理器に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electromagnetic induction cooker that heats an object to be heated by the electromagnetic induction effect of a high-frequency magnetic field.
この種の調理器は、周知のように、加熱コイル
に20kHz程度の高周波電力を供給することによ
り、加熱コイルに高周波磁界を生じせしめ、この
高周波磁界中に被加熱物としての調理鍋を置くこ
とにより、その調理鍋に生じる渦電流損によつて
調理鍋を加熱（自己発熱）せしめ、調理鍋内の食
品を加熱調理するのである。
As is well known, this type of cooker generates a high-frequency magnetic field in the heating coil by supplying high-frequency power of about 20 kHz to the heating coil, and places the cooking pot as an object to be heated in this high-frequency magnetic field. The eddy current loss generated in the cooking pot heats the cooking pot (self-heating) and cooks the food in the cooking pot.
このように調理器においては、従来、鉄などの
磁性体で形成された調理鍋のみを加熱し、アルミ
ニウムなどの非磁性体で形成された調理鍋の加熱
は不可能であつた。その理由は、アルミニウムの
インピーダンス（抵抗）は鉄のそれに比して約1/
１０と極端に小さく、よつて回路に大電流が流れる
ため、保護回路でそれを検知することにより動作
を禁止せしめていた。 As described above, in conventional cooking devices, only cooking pots made of magnetic materials such as iron can be heated, and it has been impossible to heat cooking pots made of non-magnetic materials such as aluminum. The reason is that the impedance (resistance) of aluminum is approximately 1/1 that of iron.
10, which causes a large current to flow through the circuit, which was detected by a protection circuit and prohibited from operating.
本発明は上記事情に鑑みてなされたもので、そ
の目的とするところは、被加熱物が磁性体あるい
は非磁性体であつてもその両方を加熱することが
できる電磁誘導調理器を提供することにある。
The present invention has been made in view of the above circumstances, and its purpose is to provide an electromagnetic induction cooker that can heat both magnetic and non-magnetic objects. It is in.
本発明は、平板状に巻かれ、巻中心を略同一と
するそれぞれ巻数の異なる２種類の加熱コイルを
設けるとともに、この各加熱コイルに対しそれぞ
れ略20KHzと50KHz以上の２種類の高周波電力を
供給するインバータ回路を設け、さらに被加熱物
が磁性体か非磁性体かを判別する検知器を設け、
この検知器の判別結果に応じて各加熱コイルを選
択し上記２種類のいずれか一方の高周波電力で加
熱コイルを駆動する構成としたものである。
The present invention provides two types of heating coils each having a different number of turns that are wound in a flat plate shape and having approximately the same center of winding, and supplies two types of high frequency power of approximately 20 KHz and 50 KHz or more to each heating coil, respectively. In addition, a detector is installed to determine whether the heated object is magnetic or non-magnetic.
Each heating coil is selected according to the determination result of the detector, and the heating coil is driven with one of the two types of high-frequency power.
以下、本発明の一実施例について図面を参照し
て説明する。
An embodiment of the present invention will be described below with reference to the drawings.
第１図において、１はたとえば耐熱ガラスによ
り形成された加熱台で、その上には被加熱物とし
ての調理鍋２が載置される。上記加熱台１の裏側
には平板状かつ環状の加熱コイル３1，３2が巻中
心を略同一とする２段重ねで配設され、この加熱
コイル３1，３2によつて調理鍋２を加熱台１を介
して電磁誘導加熱し、その中の食品４を加熱調理
するようになつている。上記一方の加熱コイル３
１は、たとえば鉄あるいはステンレスなどの磁性
体用であり、加熱コイル３2よりも巻数が少ない。
また、上記他方の加熱コイル３2は、たとえばア
ルミニウムなどの非磁性体用であり、加熱コイル
３1よりも巻数を多くしてある。そこで、その理
由について述べると、実験によれば、非磁性体の
加熱には周波数を高くし、表皮効果により被加熱
物の抵抗値を大きくして加熱する必要がある。そ
こで、１次コイルとなる加熱コイルの巻数を多く
することにより、２次コイルとなる被加熱物の抵
抗値を等価的に増大せしめるものである。しかし
て、加熱台１の裏側で加熱コイル３1，３2の中心
部には筒状の磁石ガイド５が設けられ、このガイ
ド５内には永久磁石６が上下動自在に設けられて
いる。上記永久磁石６は、調理鍋２が磁性体であ
る場合は上方に移動して、加熱台１を介してその
底面に吸着し、非磁性体である場合は吸引されな
いので下方の所定部位に位置し、このとき常閉形
のマイクロスイツチ７のアクチユエータ７ａを押
圧してスイツチ７をオフ（開放）するようになつ
ている。ここに、上記ガイド５、永久磁石６およ
びスイツチ７は、調理鍋２が磁性体か非磁性体か
を判別する検知器８を構成している。 In FIG. 1, reference numeral 1 denotes a heating table made of, for example, heat-resistant glass, on which a cooking pot 2 as an object to be heated is placed. On the back side of the heating stand 1, flat and annular heating coils 3 1 , 3 2 are stacked in two layers with substantially the same winding center. is heated by electromagnetic induction via a heating stand 1, and the food 4 therein is heated and cooked. One of the above heating coils 3
1 is for a magnetic material such as iron or stainless steel, and has a smaller number of turns than the heating coil 3 2 .
The other heating coil 3 2 is made of a non-magnetic material such as aluminum, and has a larger number of turns than the heating coil 3 1 . The reason for this is that, according to experiments, it is necessary to heat a non-magnetic material by increasing the frequency and increasing the resistance value of the object to be heated due to the skin effect. Therefore, by increasing the number of turns of the heating coil which becomes the primary coil, the resistance value of the object to be heated which becomes the secondary coil is equivalently increased. A cylindrical magnet guide 5 is provided at the center of the heating coils 3 1 and 3 2 on the back side of the heating table 1, and a permanent magnet 6 is provided within the guide 5 so as to be movable up and down. If the cooking pot 2 is made of a magnetic material, the permanent magnet 6 moves upward and is attracted to the bottom surface of the cooking pot 2 via the heating platform 1. If it is made of a non-magnetic material, the permanent magnet 6 is not attracted and is positioned at a predetermined position below. At this time, the actuator 7a of the normally closed micro switch 7 is pressed to turn off (open) the switch 7. Here, the guide 5, permanent magnet 6, and switch 7 constitute a detector 8 that determines whether the cooking pot 2 is a magnetic material or a non-magnetic material.
次に、第２図によつて電気回路を説明する。１
１は商用交流電源で、この電源１１には電源スイ
ツチ１２と前記スイツチ７とを直列に介してリレ
ー１３が接続される。上記電源スイツチ１２とリ
レー１３との接続点Ａは、リレー１３の常開接点
１３1と常閉接点１４1とを直列に介してインバー
タ回路１５1の一端に接続されるとともに、リレ
ー１３の常閉接点１３2と常閉接点１４2とを直列
に介してインバータ回路１５2の一端に接続され
る。上記一方のインバータ回路１５1の他端には
前記加熱コイル３1の一端が接続されるとともに、
上記他方のインバータ回路１５2の他端には前記
加熱コイル３2の一端が接続される。そして、上
記加熱コイル３1，３2の各他端は、前記スイツチ
７と電源１１との接続点Ｂにそれぞれ接続され
る。上記インバータ回路１５1，１５2は、電源１
１からの商用交流電力を高周波電力に変換し、そ
れを加熱コイル３1，３2に供給するもので、たと
えば整流回路、平滑回路、スイツチング回路、こ
のスイツチング回路を駆動する駆動回路、および
異常負荷検知回路などによつて構成される。そし
て、上記一方のインバータ回路１５1は磁性体用
で、発振周波数は略20kHz程度にしてあり、また
上記他方のインバータ回路１５2は非磁性体用で、
発振周波数は50kHz以上たとえば略100kHz程度に
してある。ここで、その理由について述べると、
前述したように実験によれば、非磁性体の加熱に
は周波数を高くし、表皮効果により被加熱物の抵
抗値を大きくして加熱する必要がある。そこで、
種々の実験を行つた結果、非磁性体の場合は周波
数を略100kHz程度にすることにより、最良の結
果が得られ、磁性体の場合と略同様な加熱機能が
得られた。なお、前記常閉接点１４1，１４2は、
インバータ回路１５1，１５2内における異常負荷
検知回路の出力リレー接点である。 Next, the electric circuit will be explained with reference to FIG. 1
1 is a commercial AC power source, and a relay 13 is connected to this power source 11 via a power switch 12 and the switch 7 in series. A connection point A between the power switch 12 and the relay 13 is connected to one end of the inverter circuit 15 1 via the normally open contact 13 1 and the normally closed contact 14 1 of the relay 13 in series, and It is connected to one end of the inverter circuit 15 2 via a closed contact 13 2 and a normally closed contact 14 2 in series. One end of the heating coil 3 1 is connected to the other end of the one inverter circuit 15 1 , and
One end of the heating coil 3 2 is connected to the other end of the other inverter circuit 15 2 . The other ends of the heating coils 3 1 and 3 2 are connected to a connection point B between the switch 7 and the power source 11, respectively. The inverter circuits 15 1 , 15 2 are connected to the power supply 1
It converts commercial AC power from 1 into high-frequency power and supplies it to heating coils 3 1 and 3 2 , such as a rectifier circuit, a smoothing circuit, a switching circuit, a drive circuit that drives this switching circuit, and an abnormal load. It consists of a detection circuit, etc. The one inverter circuit 15 1 is for magnetic materials and has an oscillation frequency of about 20 kHz, and the other inverter circuit 15 2 is for non-magnetic materials.
The oscillation frequency is set to 50 kHz or more, for example, approximately 100 kHz. Here, I will explain the reason.
As mentioned above, according to experiments, it is necessary to heat a non-magnetic material by increasing the frequency and increasing the resistance value of the object to be heated due to the skin effect. Therefore,
As a result of various experiments, in the case of non-magnetic materials, the best results were obtained by setting the frequency to about 100 kHz, and a heating function almost the same as in the case of magnetic materials was obtained. Note that the normally closed contacts 14 1 and 14 2 are as follows:
This is an output relay contact of an abnormal load detection circuit in the inverter circuits 15 1 and 15 2 .
こうして、第２図の電気回路において、検知器
８の判別結果が磁性体のとき、加熱コイル３1，
３2のうち略20KHzの高周波電力で駆動する加熱
コイルを選択する選択手段と、検知器８の判別結
果が非磁性体のとき、加熱コイル３1，３2のうち
略100KHzの高周波電力で駆動する加熱コイルを
選択する選択手段とを構成している。 In this way, in the electric circuit shown in FIG. 2, when the detection result of the detector 8 is a magnetic material, the heating coils 3 1 ,
3 A selection means for selecting a heating coil to be driven with a high frequency power of approximately 20 KHz from among the heating coils 3 1 and 3 2, and a selection means for selecting a heating coil to be driven with a high frequency power of approximately 100 KHz among the heating coils 3 1 and 3 2 when the determination result of the detector 8 is a non-magnetic material. and a selection means for selecting a heating coil to be used.
次に、上記のような構成において動作を説明す
る。まず電源スイツチ１２をオンせしめる。この
状態で今、加熱台１上に鉄製の調理鍋２が載置さ
れた場合、永久磁石６が調理鍋８の底面に吸着さ
れるので、スイツチ７のアクチエータ７ａは押圧
を解除され、よつてスイツチ７はオン（閉成）す
る。スイツチ７がオンするとリレー１３が付勢さ
れ、その常閉接点１３2が開放して常開接撤１３1
は閉成する。すると、磁性体用のインバータ回路
１５1が発振動作して、加熱コイル３1に20kHz程
度の高周波電力が供給されるので、加熱コイル３
１から高周波磁界が生じ、その磁界によつて鉄製
の調理鍋２に渦電流損が生じる。したがつて、そ
の過電流損によつて調理鍋２が加熱（自己発熱）
され、調理鍋２内の食品４が加熱調理される。こ
の場合、常閉接点１３2が開放しているので非磁
性体用のインバータ回路１５2は動作しない。 Next, the operation in the above configuration will be explained. First, turn on the power switch 12. If the iron cooking pot 2 is now placed on the heating table 1 in this state, the permanent magnet 6 will be attracted to the bottom surface of the cooking pot 8, so the actuator 7a of the switch 7 will be released from pressure. Switch 7 is turned on (closed). When the switch 7 is turned on, the relay 13 is energized, and its normally closed contact 13 2 is opened to remove the normally open contact 13 1
is closed. Then, the inverter circuit 15 1 for the magnetic material operates in oscillation, and high frequency power of about 20 kHz is supplied to the heating coil 3 1 .
A high frequency magnetic field is generated from the iron cooking pot 1 , and this magnetic field causes eddy current loss in the iron cooking pot 2. Therefore, the cooking pot 2 heats up (self-heating) due to the overcurrent loss.
The food 4 in the cooking pot 2 is heated and cooked. In this case, since the normally closed contact 13 2 is open, the inverter circuit 15 2 for non-magnetic material does not operate.
一方、加熱台１上にアルミニウム製の調理鍋２
が載置された場合、永久磁石６は吸収されないの
で、永久磁石６はスイツチ７のアクチエータ７ａ
を押圧し、よつてスイツチ７はオフ（開放）す
る。スイツチ７がオフするとリレー１３は付勢さ
れないので、その常閉接点１３2は閉成して常開
接点１３1が開放する。すると、非磁性体用のイ
ンバータ回路１５2が発振動作して、加熱コイル
３2に100kHz程度の高周波電力が供給されるので、
加熱コイル３2から高周波磁界が生じ、アルミニ
ウム製の調理鍋２が電磁誘導加熱される。この場
合、常開接点１３1が開放しているので磁性体用
のインバータ回路１５1は動作しない。 On the other hand, an aluminum cooking pot 2 is placed on the heating table 1.
is placed, the permanent magnet 6 will not be absorbed, so the permanent magnet 6 will not be absorbed by the actuator 7a of the switch 7.
is pressed, and the switch 7 is turned off (opened). When the switch 7 is turned off, the relay 13 is not energized, so its normally closed contact 13 2 is closed and its normally open contact 13 1 is opened. Then, the inverter circuit 15 2 for non-magnetic materials operates in oscillation, and high frequency power of about 100 kHz is supplied to the heating coil 3 2 .
A high frequency magnetic field is generated from the heating coil 32 , and the aluminum cooking pot 2 is heated by electromagnetic induction. In this case, since the normally open contact 13 1 is open, the inverter circuit 15 1 for magnetic material does not operate.
このような構成であれば、調理鍋が鉄製である
かアルミニウム製であるかを自動的に判別し、そ
の判別結果によりそれぞれに最適のインバータ回
路と加熱コイルを選択できる。したがつて、鉄製
の調理鍋とアルミニウム製の調理鍋を１つの調理
器でしかもその調理器の加熱台上の一個所で加熱
できるようになり、きわめて便利で実用的であ
る。また、前述したような構成であれば、検知器
により調理鍋の材質を判別した上で鍋の有無など
を検知する異常負荷検知回路が動作するので、効
率よく異常負荷状態の検知が可能となる。 With such a configuration, it is possible to automatically determine whether the cooking pot is made of iron or aluminum, and to select the optimal inverter circuit and heating coil for each type of cooking pot based on the determination result. Therefore, it is now possible to heat both an iron cooking pot and an aluminum cooking pot in one cooking device and in one place on the heating stand of the cooking device, which is extremely convenient and practical. In addition, with the above-described configuration, the abnormal load detection circuit that detects the presence or absence of a cooking pot after determining the material of the cooking pot with a detector operates, making it possible to efficiently detect abnormal load conditions. .
なお、前記実施例では、それぞれ専用の加熱コ
イル３1，３2を用いた場合について説明したが、
たとえばそれぞれ巻数の等しい加熱コイル３1，
３2を使用し、第３図に示すようにリレー１３の
常開接点１３3，１３4および常閉接点１３5を用
いて並列あるいは直列接続するようにしてもよ
い。この場合、インバータ回路１５1が選択され
るときは並列接続され、インバータ回路１５2が
選択されるときは直列接続されるように、回路構
成すればよい。このようにしても前記実施例と同
様な作用効果が得られる。 In addition, in the above embodiment, a case was explained in which dedicated heating coils 3 1 and 3 2 were used, respectively.
For example, heating coils 3 1 each having the same number of turns,
3 2 may be used and connected in parallel or in series using the normally open contacts 13 3 , 13 4 and normally closed contact 13 5 of the relay 13 as shown in FIG. In this case, the circuit may be configured so that when the inverter circuit 15 1 is selected, they are connected in parallel, and when the inverter circuit 15 2 is selected, they are connected in series. Even in this case, the same effects as in the embodiment described above can be obtained.
また、たとえば第４図に示すように、インバー
タ回路１５1，１５2の各駆動回路を分離して１つ
の共通な駆動回路１６とし、この駆動回路１６で
インバータ１７1，１７2を選択的に駆動するよう
にする。この場合、駆動回路１６にスイツチ７を
介して周波数切換信号を供給することにより、発
振周波数を切換える。すなわち、スイツチ７がオ
ンしている場合、駆動回路１６はインバータ１７
１を選択して20kHzで発振するように駆動し、スイ
ツチ７がオフしている場合、駆動回路１６はイン
バータ１７2を選択して100kHzで発振するように
駆動する。このようにしても前記実施例と同様な
作用効果が得られる。 Further, as shown in FIG. 4, for example, each drive circuit of the inverter circuits 15 1 and 15 2 is separated into one common drive circuit 16, and this drive circuit 16 selectively controls the inverters 17 1 and 17 2 . Make it drive. In this case, the oscillation frequency is switched by supplying a frequency switching signal to the drive circuit 16 via the switch 7. That is, when the switch 7 is on, the drive circuit 16 turns on the inverter 17.
1 and drives to oscillate at 20kHz, and when switch 7 is off, drive circuit 16 selects inverter 172 and drives to oscillate at 100kHz. Even in this case, the same effects as in the embodiment described above can be obtained.
また、インバータ回路は、１つの電気回路で構
成し、周波数を切換えることにより、２種類のイ
ンバータ回路としてもよい。 Further, the inverter circuit may be configured with one electric circuit, and by switching the frequency, two types of inverter circuits may be formed.
さらに、前記実施例では、非磁性体用のインバ
ータ回路の発振周波数を100kHzにしたが、必ず
しもそのようにする必要はなく、実験によれば少
なくとも50kHz以上であれば目的を達成し得るこ
とを確認している。また、被加熱物の材質を判別
する検知器としては、永久磁石とマイクロスイツ
チとからなる検知器を用いたが、たとえばサーチ
コイルあるいはホール素子を用いた検知器であつ
てもよい。 Furthermore, in the above example, the oscillation frequency of the inverter circuit for non-magnetic materials was set to 100kHz, but it is not necessarily necessary to do so, and experiments have confirmed that the objective can be achieved as long as it is at least 50kHz or higher. are doing. Further, as a detector for determining the material of the object to be heated, a detector composed of a permanent magnet and a microswitch was used, but a detector using a search coil or a Hall element, for example, may be used.
以上詳述したように本発明によれば、被加熱物
が磁性体あるいは非磁性体であつてもその両方を
加熱することができ、きわめて便利で実用的な電
磁誘導調理器を提供できる。
As described in detail above, according to the present invention, even if the object to be heated is a magnetic material or a non-magnetic material, it is possible to heat both, and it is possible to provide an extremely convenient and practical electromagnetic induction cooker.
第１図は本発明の一実施例を示す概略構成図、
第２図は同実施例の電気回路を示す構成図、第３
図および第４図はそれぞれ本発明の他の実施例を
示す電気回路の構成図である。
１……加熱台、２……調理鍋（被加熱物）、３
１，３2……加熱コイル、４……食品、８……検知
器、１１……電源、１３……リレー、１５1，１
５2……インバータ回路。
FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention;
Figure 2 is a configuration diagram showing the electric circuit of the same embodiment;
4 and 4 are configuration diagrams of electric circuits showing other embodiments of the present invention, respectively. 1...Heating stand, 2...Cooking pot (item to be heated), 3
1 , 3 2 ... heating coil, 4 ... food, 8 ... detector, 11 ... power supply, 13 ... relay, 15 1 , 1
5 2 ...Inverter circuit.
Claims (1)
ぞれ巻数の異なる２種類の加熱コイルと、この各
加熱コイルに対しそれぞれ略20KHzと50KHz以上
の２種類の高周波電力を供給するインバータ回路
と、被加熱物が磁性体か非磁性体かを判別する検
知器と、この検知器の判別結果が磁性体のときは
略20KHzの高周波電力で駆動する加熱コイルを選
択する選択手段と、前記検知器の判別結果が非磁
性体のときは50KHz以上の高周波電力で駆動する
加熱コイルを選択する選択手段とを具備してなる
ことを特徴とする電磁誘導調理器。1. Two types of heating coils that are wound in a flat plate shape and each having a different number of turns with substantially the same center of winding, and an inverter circuit that supplies two types of high frequency power of approximately 20 KHz and 50 KHz or more to each heating coil, respectively. a detector for determining whether an object to be heated is a magnetic material or a non-magnetic material; a selection means for selecting a heating coil driven by high frequency power of about 20 KHz when the detection result of the detector is a magnetic material; and the detector. An electromagnetic induction cooker comprising: selection means for selecting a heating coil driven by high frequency power of 50 KHz or higher when the determination result is a non-magnetic material.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57159325A JPS5949186A (en) | 1982-09-13 | 1982-09-13 | Electromagnetic induction cooking device |
| AU18763/83A AU543894B2 (en) | 1982-09-13 | 1983-09-06 | Electromagnetic induction heating apparatus |
| US06/530,675 US4549056A (en) | 1982-09-13 | 1983-09-09 | Electromagnetic induction heating apparatus capable of heating nonmagnetic cooking vessels |
| NLAANVRAGE8303136,A NL189227C (en) | 1982-09-13 | 1983-09-10 | APPARATUS FOR INDUCTIVE HEATING OF METAL COOKERS. |
| GB08324323A GB2128060B (en) | 1982-09-13 | 1983-09-12 | Electromagnetic induction heating apparatus |
| CA000436497A CA1201174A (en) | 1982-09-13 | 1983-09-12 | Electromagnetic induction heating apparatus |
| KR1019830004277A KR880001086B1 (en) | 1982-09-13 | 1983-09-12 | Induction heating device |
| DE19833332990 DE3332990A1 (en) | 1982-09-13 | 1983-09-13 | ELECTROMAGNETIC INDUCTION HEATING DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57159325A JPS5949186A (en) | 1982-09-13 | 1982-09-13 | Electromagnetic induction cooking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5949186A JPS5949186A (en) | 1984-03-21 |
| JPH0231472B2 true JPH0231472B2 (en) | 1990-07-13 |
Family
ID=15691336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57159325A Granted JPS5949186A (en) | 1982-09-13 | 1982-09-13 | Electromagnetic induction cooking device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5949186A (en) |
| KR (1) | KR880001086B1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6116491A (en) * | 1984-06-30 | 1986-01-24 | 株式会社東芝 | Induction heating cooking device |
| JPH0612699B2 (en) * | 1985-11-27 | 1994-02-16 | 株式会社東芝 | Induction heating cooker |
| JPH07114744B2 (en) * | 1988-10-31 | 1995-12-13 | 松下電器産業株式会社 | rice cooker |
| JPH0817735B2 (en) * | 1990-03-12 | 1996-02-28 | 松下電器産業株式会社 | rice cooker |
| JP2003178863A (en) * | 2001-12-11 | 2003-06-27 | Matsushita Electric Ind Co Ltd | Induction heating device |
| WO2007119873A1 (en) * | 2006-04-12 | 2007-10-25 | Hitachi High-Technologies Corporation | Scanning type electronic microscope |
| JP4863974B2 (en) * | 2007-11-26 | 2012-01-25 | 三菱電機株式会社 | Induction heating cooker |
| JP2009176743A (en) * | 2009-03-25 | 2009-08-06 | Hitachi Appliances Inc | Induction cooker |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5596596A (en) * | 1979-01-17 | 1980-07-22 | Hitachi Netsu Kigu Kk | Induction heating cooking device |
| JPS5643995U (en) * | 1979-08-15 | 1981-04-21 | ||
| JPS5673883A (en) * | 1979-11-16 | 1981-06-18 | Matsushita Electric Ind Co Ltd | Malfunction load detector for induction heating cooling unit |
| JPS58142783A (en) * | 1982-02-18 | 1983-08-24 | 松下電器産業株式会社 | Induction heating cooking device |
-
1982
- 1982-09-13 JP JP57159325A patent/JPS5949186A/en active Granted
-
1983
- 1983-09-12 KR KR1019830004277A patent/KR880001086B1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5596596A (en) * | 1979-01-17 | 1980-07-22 | Hitachi Netsu Kigu Kk | Induction heating cooking device |
| JPS5643995U (en) * | 1979-08-15 | 1981-04-21 | ||
| JPS5673883A (en) * | 1979-11-16 | 1981-06-18 | Matsushita Electric Ind Co Ltd | Malfunction load detector for induction heating cooling unit |
| JPS58142783A (en) * | 1982-02-18 | 1983-08-24 | 松下電器産業株式会社 | Induction heating cooking device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR880001086B1 (en) | 1988-06-22 |
| KR840006432A (en) | 1984-11-29 |
| JPS5949186A (en) | 1984-03-21 |
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