JPH0739193Y2 - Electric cooker - Google Patents
Electric cookerInfo
- Publication number
- JPH0739193Y2 JPH0739193Y2 JP7238190U JP7238190U JPH0739193Y2 JP H0739193 Y2 JPH0739193 Y2 JP H0739193Y2 JP 7238190 U JP7238190 U JP 7238190U JP 7238190 U JP7238190 U JP 7238190U JP H0739193 Y2 JPH0739193 Y2 JP H0739193Y2
- Authority
- JP
- Japan
- Prior art keywords
- heater
- temperature protector
- heating plate
- protective
- switch
- 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 23
- 230000001681 protective effect Effects 0.000 claims description 22
- 230000001012 protector Effects 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 7
- 239000010445 mica Substances 0.000 description 5
- 229910052618 mica group Inorganic materials 0.000 description 5
- 238000010411 cooking Methods 0.000 description 3
- 206010014357 Electric shock Diseases 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Electric Stoves And Ranges (AREA)
- Control Of Resistance Heating (AREA)
Description
【考案の詳細な説明】 （イ）産業上の利用分野 本考案は、供給電圧に応じて少なくとも２つのヒータを
直列または並列に切換接続するもので、この切換時にお
ける切換スイッチのアーク電流による短絡回路を防止す
るための保護抵抗を有した電気調理器に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is to switch and connect at least two heaters in series or in parallel according to the supply voltage, and at the time of this switching, a short circuit due to an arc current of the changeover switch. The present invention relates to an electric cooker having a protective resistance for preventing a circuit.
（ロ）従来の技術 此種の供給電圧に応じて切換スイッチを作動し２つのヒ
ータを直列または並列に切換接続するものは特開昭62−
290404号公報に開示されている。この先行技術では、２
つのヒータが並列接続された低電圧対応状態から供給電
圧が高くて２つのヒータが直列接続に切換わる高電圧対
応状態では切換スイッチの接点間に発生するアークによ
って短絡回路が形成されコードを焼損したり感電する危
険を防止するために保護ヒータを切換スイッチに接続し
ている。(B) Prior art Japanese Unexamined Patent Publication No. 62-62-62, which operates a changeover switch in accordance with this kind of supply voltage to connect two heaters in series or in parallel.
It is disclosed in Japanese Patent No. 290404. In this prior art, 2
In the state where the supply voltage is high and the two heaters are switched to the series connection when the two heaters are connected in parallel and the two heaters are connected in parallel, a short circuit is formed by the arc generated between the contacts of the changeover switch and the cord is burned. A protective heater is connected to the changeover switch to prevent the risk of electric shock or electric shock.
そして、この先行技術はその実施例がヘアードライヤー
であり、特に保護ヒータの位置等については何ら配慮さ
れておらず保護ヒータの発生熱は単に２つのヒータの発
生熱と混合して温風にするだけでよかった。In this prior art, the embodiment is a hair dryer, and no particular consideration is given to the position of the protective heater, and the heat generated by the protective heater is simply mixed with the heat generated by the two heaters to produce warm air. Just good.
ところが、供給電圧に応じて２つのヒータを切換接続す
る電気調理器においては、被調理物と加熱ヒータとを接
触させて使用するため、被調理物への熱伝導の点から２
つのヒータ及び保護ヒータの配置が難しく、さらに温度
ヒューズ等の温度保安器の動作温度や位置をも考慮する
必要があり、例えば、２つのヒータと保護ヒータと温度
保安器の各々の発熱量や動作温度や取り付け位置が適性
でない場合には正常な状態の時に温度保安器が動作して
調理ができないといった欠点がある。However, in the electric cooker in which the two heaters are switched and connected according to the supply voltage, the cooking object and the heating heater are used in contact with each other, so that the heat conduction to the cooking object is 2
It is difficult to arrange two heaters and a protective heater, and it is necessary to consider the operating temperature and position of the temperature protector such as a thermal fuse. For example, the heat generation amount and operation of each of the two heaters, the protective heater, and the temperature protector. If the temperature and the mounting position are not suitable, there is a drawback that the temperature protector operates in a normal state and cooking cannot be performed.
（ハ）考案が解決しようとする課題 本考案は、上記の点に鑑み第１、第２ヒータと保護抵抗
と温度保安器を適性位置に配置して温度保安器の誤動作
を防止したものである。(C) Problem to be Solved by the Invention In view of the above points, the present invention prevents the malfunction of the temperature protector by arranging the first and second heaters, the protective resistor, and the temperature protector at appropriate positions. .
（ニ）課題を解決するための手段 本考案は、第１ヒータと第２ヒータとを巻装した面状の
加熱板と該加熱板の下面の一部に対向して配設した面状
の保護抵抗とからなる加熱ヒータと、前記加熱ヒータの
下方に設けた温度保安器と、供給電圧を検出して切換ス
イッチを作動し前記第１ヒータと第２ヒータの各々を直
列または並列に切換接続する電圧検出回路とを備え、前
記切換スイッチは前記保護抵抗と第１ヒータ或は第２ヒ
ータとの間に接続し、前記温度保安器は前記保護抵抗の
直下を避けて配設固定した構成とする。(D) Means for Solving the Problems The present invention is directed to a planar heating plate around which a first heater and a second heater are wound, and a planar heating plate disposed so as to face a part of the lower surface of the heating plate. A heater consisting of a protective resistor, a temperature protector provided below the heater, a supply voltage is detected, and a changeover switch is operated to connect the first heater and the second heater in series or in parallel. And a voltage detection circuit for operating the protection switch, wherein the changeover switch is connected between the protection resistor and the first heater or the second heater, and the temperature protector is arranged and fixed so as not to be directly below the protection resistor. To do.
（ホ）作用 第１ヒータと第２ヒータよりなる面状の加熱板は加熱ヒ
ータの上面となり、面状の保護抵抗は加熱板の下面とな
って、第１ヒータと第２ヒータの各々が直列または並列
の何れに接続された状態であっても加熱板の全面が発熱
することになる。また、温度保安器は前記保護抵抗の直
下を避けて加熱ヒータの下方に配設固定しており、供給
電圧が異っても常時発熱状態にある第１ヒータ或は第２
ヒータの温度を感知する。(E) Action The planar heating plate composed of the first heater and the second heater serves as the upper surface of the heating heater, and the planar protective resistance serves as the lower surface of the heating plate, and the first heater and the second heater are connected in series. Alternatively, the entire surface of the heating plate will generate heat regardless of whether it is connected in parallel. Further, the temperature protector is arranged and fixed below the heating heater so as to avoid immediately below the protective resistance, and the first heater or the second heater which is always in the heat generation state even when the supply voltage is different.
Detects heater temperature.
（ヘ）実施例 本考案の実施例を図面に基づいて説明する。第１図及び
第２図は平面部分断面図及び側面断面図を示す。（１）
は調理器本体、（２）は内側に収納空間（３）を形成し
たフレーム、（４）は前記収納空間（３）の上面を覆っ
て固定した皿状の反射板、（５）は前記反射板（４）の
上面に所定間隙（Ｓ）を存して取り付けた平面形状が円
形の加熱ヒータで、上面には２枚の半円形のマイカ板
（6a）（6b）を水平方向に並設し一方のマイカ板（6a）
に第１ヒータ（７）を巻装し、他方のマイカ板（6b）に
前記第１ヒータ（７）よりも若干抵抗値の小さい第２ヒ
ータ（８）を巻装した面状の加熱板（９）と、該加熱板
の下面に水平方向に並設した２枚の半円形のマイカ板
（10a）、（10b）の前記第２ヒータ（８）に対向するマ
イカ板（10b）に巻装した面状の保護抵抗（11）と、最
上面に設けたアルミニウム材よりなる加熱プレート（1
2）と最下面に設けた裏板（13）とからなる。(F) Embodiment An embodiment of the present invention will be described with reference to the drawings. 1 and 2 show a plan partial sectional view and a side sectional view. (1)
Is a cooker main body, (2) is a frame having a storage space (3) formed inside, (4) is a plate-shaped reflector plate fixed to cover the upper surface of the storage space (3), and (5) is the reflection A heater with a circular planar shape attached to the upper surface of the plate (4) with a predetermined gap (S). Two semicircular mica plates (6a) and (6b) are horizontally arranged side by side on the upper surface. One side mica plate (6a)
A sheet-like heating plate in which a first heater (7) is wound around and a second heater (8) whose resistance value is slightly smaller than that of the first heater (7) is wound around the other mica plate (6b) ( 9) and two semicircular mica plates (10a) and (10b), which are horizontally arranged on the lower surface of the heating plate, wound around the mica plate (10b) facing the second heater (8). The sheet-like protective resistance (11) and the heating plate (1
2) and a back plate (13) provided on the bottom surface.
前記保護抵抗（11）は第１ヒータ（７）と第２ヒータ
（８）の直、並列切換接続時における短絡回路を防止す
るもので、その抵抗値は前記第２ヒータ（８）の抵抗値
と合算した値が第１ヒータ（７）の抵抗値と同一か近似
値になる様に設定している。The protection resistor (11) prevents a short circuit when the first heater (7) and the second heater (8) are connected in series or in parallel, and the resistance value thereof is the resistance value of the second heater (8). It is set so that the value obtained by summing with is the same as or close to the resistance value of the first heater (7).
（14）は前記加熱ヒータ（５）を反射板（４）に固定す
る支持金具、（15）は反射板（４）とフレーム（２）を
固定するネジ、（16）は前記収納空間（３）内の適所に
収納固定した後述する電圧検出回路（22）の降圧抵抗、
（17）は前記第１ヒータ（７）の下方であって前記保護
抵抗（11）の直下を避けて収納空間（３）内に固定した
温度リミッター等の温度保安器で、何らかの理由により
加熱ヒータ（５）が異常高温となった場合に各々のヒー
タへの通電を遮断する。（18）は一端を前記支持板（1
4）とともに反射板（４）に固定し他端に前記温度保安
器（17）を取り付けた取付金具である。Reference numeral (14) is a support fitting for fixing the heater (5) to the reflection plate (4), (15) is a screw for fixing the reflection plate (4) and the frame (2), and (16) is the storage space (3). ), The step-down resistor of the voltage detection circuit (22), which will be described later, stored and fixed in place,
Reference numeral (17) is a temperature protector such as a temperature limiter fixed below the first heater (7) and directly below the protective resistance (11) in the storage space (3). When (5) becomes an abnormally high temperature, power supply to each heater is cut off. (18) has the support plate (1
It is a metal fitting which is fixed to the reflector (4) together with (4) and has the temperature protector (17) attached to the other end.
第３図は電気回路図を示すもので、（19）は交流電源、
（20）、（21）は各々が２つの固定接点（20a）（20
b）、（21a）（21b）と可動接点（20c）（21c）を有し
電圧検出回路（22）によって各々の可動接点が連動して
作動する第１及び第２スイッチ（切換スイッチ）で、第
１スイッチ（20）の可動接点（20c）は第１ヒータ
（７）と第２ヒータ（８）の接続部に接続し固定接点
（20a）は交流電源（19）の一極と第２スイッチ（21）
の固定接点（21b）に接続し、第２スイッチ（21）の可
動接点（21c）は第２ヒータ（８）に接続し、固定接点
（21a）は保護抵抗（11）に接続している。また、第１
ヒータ（７）と保護抵抗（11）の端部は交流電源（19）
の他極に接続している。（22）は前記第１ヒータ（７）
の両端間に接続した供給される交流電源（19）の電圧検
出回路で、一定電圧（約150V）以上で導通する定電圧素
子（23）と抵抗（24）、前記定電圧素子（23）の導通時
に導通するSCR（25）及び該SCRに直列接続しており前記
第１及び第２スイッチ（20）、（21）の可動接点（20
c）、（21c）を作動するリレー（26）と、トリガー素子
（27）、SCR（25）の導通時に点灯して供給されている
電源電圧が高電圧であることを表示するランプ（28）
と、降圧抵抗（16）とダイオード（29）、コンデンサー
（30）等から構成する。そして、温度保安器（17）は交
流電源（19）の一極と第１及び第２ヒータ（７）、
（８）との間に接続している。Fig. 3 shows an electric circuit diagram. (19) is an AC power supply,
(20) and (21) each have two fixed contacts (20a) (20
b), (21a) (21b) and movable contacts (20c) (21c), and the first and second switches (changeover switches) which are activated by the voltage detection circuit (22) and each movable contact interlocks, The movable contact (20c) of the first switch (20) is connected to the connecting portion of the first heater (7) and the second heater (8), and the fixed contact (20a) is one pole of the AC power supply (19) and the second switch. (twenty one)
Of the second switch (21), the movable contact (21c) of the second switch (21) is connected to the second heater (8), and the fixed contact (21a) is connected to the protective resistor (11). Also, the first
The ends of the heater (7) and protection resistor (11) are AC power supply (19)
It is connected to the other pole of. (22) is the first heater (7)
In the voltage detection circuit of the supplied AC power supply (19) connected between both ends of the constant voltage element (23) and the resistor (24) which conducts at a constant voltage (about 150V) or more, the constant voltage element (23). The SCR (25) that conducts at the time of conduction and the movable contact (20) of the first and second switches (20) and (21) that are connected in series to the SCR (25)
A lamp (28) that lights up when the relay (26) for activating (c) and (21c) and the trigger element (27) and SCR (25) are turned on to indicate that the supplied power voltage is high.
And a step-down resistor (16), diode (29), capacitor (30), etc. The temperature protector (17) has one pole of the AC power source (19) and the first and second heaters (7),
It is connected to (8).
次に動作について述べる。Next, the operation will be described.
被調理物を収容した鍋（図示せず）を加熱プレート（1
2）の上面に載置した交流電源（19）を供給する。Place the pan (not shown) containing the food to be cooked on the heating plate (1
Supply the AC power source (19) placed on the upper surface of 2).
供給される電源電圧が低圧（100V）の場合は、定電圧素
子（23）及びSCR（25）が導通せず第１及び第２スイッ
チ（20）、（21）の各々の可動接点（20c）、（21c）は
第３図の実線に示す位置のままであり、第２ヒータ
（８）と保護抵抗（11）の直列回路と第１ヒータ（７）
との並列回路が第１スイッチ（20）の可動接点（20c）
と固定接点（20a）を介して交流電源に接続される。When the supplied power voltage is low voltage (100V), the constant voltage element (23) and the SCR (25) do not conduct, and the movable contact (20c) of each of the first and second switches (20) and (21). , (21c) remain at the positions shown by the solid line in FIG. 3, and the series circuit of the second heater (8) and the protective resistor (11) and the first heater (7)
Parallel circuit with the movable contact (20c) of the first switch (20)
And a fixed contact (20a) to the AC power supply.
この状態では第１ヒータ（７）と第２ヒータ（８）が主
として発熱して鍋を加熱するが、保護抵抗（11）の発熱
量は僅かであり鍋を加熱する程度とはならない。In this state, the first heater (7) and the second heater (8) mainly generate heat to heat the pot, but the protection resistor (11) generates a small amount of heat and does not heat the pot.
そして、供給される電源電圧が高圧（200V）の場合は、
定電圧素子（23）及びSCR（25）が導通しランプ（28）
が点灯して高圧であることを表示するとともにリレー
（26）が駆動して第１及び第２スイッチ（20）、（21）
の可動接点（20c）、（21c）を作動し破線位置に切換え
て第２スイッチ（21）の固定接点（21b）、可動接点（2
1c）を介して第１ヒータ（７）と第２ヒータ（８）を直
列接続する。この時、第２スイッチ（21）の可動接点
（21a）を介して固定接点（21a）と固定接点（21b）間
にアーク電流を発生するが保護抵抗（11）によって短絡
回路が形成されない。If the power supply voltage supplied is high voltage (200V),
The constant voltage element (23) and SCR (25) become conductive and the lamp (28)
Lights up to indicate that the voltage is high, and the relay (26) is driven to activate the first and second switches (20), (21).
The movable contacts (20c) and (21c) of the second switch (21) are operated to switch to the position indicated by the broken line, and the fixed contact (21b) and movable contact (2) of the second switch (21)
The first heater (7) and the second heater (8) are connected in series via 1c). At this time, an arc current is generated between the fixed contact (21a) and the fixed contact (21b) via the movable contact (21a) of the second switch (21), but the protection resistor (11) does not form a short circuit.
この状態では第１ヒータ（７）と第２ヒータ（８）のみ
が発熱し保護抵抗（11）は全く発熱しない。In this state, only the first heater (7) and the second heater (8) generate heat and the protective resistor (11) does not generate heat at all.
前述の供給される電源電圧が低圧及び高圧の何れの場合
の使用状態においても、もし、何らかの理由（第１ヒー
タ或は第２ヒータの膨張による短絡）によって加熱ヒー
タ（５）が異常高温になった場合においても、温度保安
器（17）はこの異常高温を保護抵抗（11）によって遮ぎ
られることなく感知して主回路を遮断する。In any of the above-mentioned usage states in which the supplied power voltage is low or high, the heating heater (5) becomes abnormally high temperature for some reason (short circuit due to expansion of the first heater or the second heater). Even in the case of failure, the temperature protector (17) senses this abnormally high temperature without being blocked by the protection resistor (11) and shuts off the main circuit.
尚、本実施例では温度保安器の配置を第１ヒータの下方
に設けたが、第２ヒータの下方に設けてもよい。Although the temperature protector is arranged below the first heater in this embodiment, it may be arranged below the second heater.
（ト）考案の効果 以上の様に本考案は、温度保安器を保護抵抗の直下を避
けて第１ヒータと第２ヒータよりなる加熱板の下面の一
部に対向して配設したため、保護抵抗によって切換スイ
ッチの切換時におけるアークの発生を防ぎ電圧検出回路
によって第１ヒータと第２ヒータの各々が直列或は並列
の何れの切換接続状態における異常高温時にも保護抵抗
によって遮ぎられず温度保安器がこの高温を正確に感知
することができる。また、保護抵抗は加熱板の下面に設
けたため、第１ヒータと第２ヒータの発生熱を保護抵抗
に邪魔されず直接加熱板の上方に伝達することができ
る。(G) Effect of the Invention As described above, according to the present invention, the temperature protector is arranged so as to face a part of the lower surface of the heating plate composed of the first heater and the second heater while avoiding directly under the protective resistance, The resistance prevents the arc from being generated when the changeover switch is changed, and the voltage detection circuit keeps the temperature stable without being blocked by the protective resistance even when the first heater and the second heater are in an abnormally high temperature in either the series connection or the parallel connection state. The vessel can accurately detect this high temperature. Further, since the protective resistance is provided on the lower surface of the heating plate, the heat generated by the first heater and the second heater can be directly transmitted to the upper side of the heating plate without being disturbed by the protective resistance.
第１図は本考案の電気調理器の平面部分断面図，第２図
は第１図のＡ−Ａ′断面図、第３図は電気回路図であ
る。 （５）……加熱ヒータ、（７）……第１ヒータ、（８）
……第２ヒータ、（９）……加熱板、（11）……保護抵
抗、（17）……温度保安器、（20）、（21）……切換ス
イッチ（第１、第２スイッチ）、（22）……電圧検出回
路。1 is a plan partial sectional view of an electric cooker according to the present invention, FIG. 2 is a sectional view taken along the line AA 'of FIG. 1, and FIG. 3 is an electric circuit diagram. (5) ... Heating heater, (7) ... First heater, (8)
...... Second heater, (9) ...... Heating plate, (11) ...... Protective resistance, (17) ...... Temperature protector, (20), (21) ...... Changeover switch (first and second switches) , (22) …… Voltage detection circuit.
Claims (1)
の加熱板と該加熱板の下面の一部に対向して配設した面
状の保護抵抗とからなる加熱ヒータと、前記加熱ヒータ
の下方に設けた温度保安器と、供給電圧を検出して切換
スイッチを作動し前記第１ヒータと第２ヒータの各々を
直列または並列に切換接続する電圧検出回路とを備え、
前記切換スイッチは前記保護抵抗と第１ヒータ或は第２
ヒータとの間に接続し、前記温度保安器は前記保護抵抗
の直下を避けて配設固定したことを特徴とする電気調理
器。1. A heating heater comprising a sheet-shaped heating plate around which a first heater and a second heater are wound, and a sheet-shaped protective resistor arranged so as to face a part of the lower surface of the heating plate. A temperature protector provided below the heating heater; and a voltage detection circuit that detects a supply voltage and operates a changeover switch to switch and connect the first heater and the second heater in series or in parallel.
The changeover switch includes the protection resistor and the first heater or the second heater.
An electric cooker, characterized in that it is connected between a heater and the temperature protector, and the temperature protector is arranged and fixed so as to avoid immediately below the protective resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7238190U JPH0739193Y2 (en) | 1990-07-06 | 1990-07-06 | Electric cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7238190U JPH0739193Y2 (en) | 1990-07-06 | 1990-07-06 | Electric cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0431293U JPH0431293U (en) | 1992-03-13 |
| JPH0739193Y2 true JPH0739193Y2 (en) | 1995-09-06 |
Family
ID=31610266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7238190U Expired - Lifetime JPH0739193Y2 (en) | 1990-07-06 | 1990-07-06 | Electric cooker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0739193Y2 (en) |
-
1990
- 1990-07-06 JP JP7238190U patent/JPH0739193Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0431293U (en) | 1992-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6427581B1 (en) | Waffle maker with cooking temperature control | |
| CA2051861C (en) | Domestic cooking apparatus | |
| US4910387A (en) | Infra-red heaters | |
| US4755655A (en) | Thermal protection arrangement for solid disk glass cooktop | |
| US4764663A (en) | Electric radiation heater assemblies | |
| JPH0739193Y2 (en) | Electric cooker | |
| WO2000010364A3 (en) | Improvements relating to electric heating elements | |
| JP3243155B2 (en) | Overcurrent protection device | |
| JP2919562B2 (en) | Heating device heater switching device | |
| JP3027294B2 (en) | Hot plate for cooking | |
| EP2821708A2 (en) | Hob assembly for range cookers | |
| JPS62144620A (en) | electric cooker | |
| JP2652430B2 (en) | Multi-division heat-sensitive sheet heating element | |
| GB2320374A (en) | Heater control circuit; cooking appliance with cover | |
| JP3321790B2 (en) | Insulation device | |
| JPS6037061Y2 (en) | Electric rice cooker with timer | |
| JPS625607B2 (en) | ||
| JPH0334599Y2 (en) | ||
| JPS6342477Y2 (en) | ||
| JP2895978B2 (en) | Electric pot | |
| JPS59191815A (en) | Controller for cooking heater | |
| JPH026887Y2 (en) | ||
| JPH0534602Y2 (en) | ||
| JPS59108512A (en) | Electric pot | |
| JPH10225370A (en) | Heat cooking system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |