JPH081306B2 - Electric stove - Google Patents
Electric stoveInfo
- Publication number
- JPH081306B2 JPH081306B2 JP61305729A JP30572986A JPH081306B2 JP H081306 B2 JPH081306 B2 JP H081306B2 JP 61305729 A JP61305729 A JP 61305729A JP 30572986 A JP30572986 A JP 30572986A JP H081306 B2 JPH081306 B2 JP H081306B2
- Authority
- JP
- Japan
- Prior art keywords
- main body
- front surface
- heating element
- receiving
- electric stove
- 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 19
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Electric Stoves And Ranges (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は火災，火傷（やけど）防止の安全装置を有し
た電気ストーブに関するものである。Description: FIELD OF THE INVENTION The present invention relates to an electric stove having a safety device for preventing fires and burns (burns).
従来の技術 従来のこの種の電気ストーブ例えば特開昭61−46821
号公報に示されるように第５図，第６図，第７図のよう
になっていた。2. Description of the Related Art A conventional electric stove of this type, for example, JP-A-61-46821.
As shown in the publication, it was as shown in FIG. 5, FIG. 6, and FIG.
第５図，第６図において、５は本体、６は発熱体、７
は反射板、８はガード、９は電源スイッチ、10は温度セ
ンサ（サーミスタ）で反射板７の中央部より突出し、ガ
ード８に接近して設けられている。11はスタートスイッ
チ、12は表示ランプである。5 and 6, 5 is a main body, 6 is a heating element, and 7
Is a reflector, 8 is a guard, 9 is a power switch, and 10 is a temperature sensor (thermistor), which is provided near the guard 8 so as to project from the center of the reflector 7. 11 is a start switch and 12 is an indicator lamp.
第７図に電気回路を示す。10は温度センサ、Raは動作
温度を調節する可変抵抗器、Tr1はトランジスタ、Tr2は
リレーReの回路をON−OFFする双方向性サイリスタ、Cr
はリレーReの接点、11はスタートスイッチ、９は電源ス
イッチ、12は表示ランプ、６はヒータ、R1〜R4は抵抗、
Ecは制御回路用直流電源、Epは100V交流電源を示す。FIG. 7 shows an electric circuit. 10 is a temperature sensor, Ra is a variable resistor that adjusts the operating temperature, Tr 1 is a transistor, Tr 2 is a bidirectional thyristor that turns the circuit of relay Re on and off, Cr
Is a contact of relay Re, 11 is a start switch, 9 is a power switch, 12 is an indicator lamp, 6 is a heater, R 1 to R 4 are resistors,
Ec indicates a DC power supply for the control circuit, and Ep indicates a 100V AC power supply.
次に上記構成による作用を説明する。すなわち、発熱
体６が発熱中に、可燃物等が電気ストーブの上に落下し
ガード８を覆ったり、異常接近すると温度センサ10雰囲
気温度が上昇し、トランジスタTr1のベース電圧が下降
する。そして動作温度を越えるとトランジスタTr1がオ
フされ、双方向性サイリスタTr2がオフされ、リレーの
コイルReがオフとなり接点Crが開き、発熱体６がオフし
火災を防止するようになっている。Next, the operation of the above configuration will be described. That is, if the combustible material or the like falls onto the electric stove and covers the guard 8 while the heating element 6 is generating heat, or if it approaches abnormally, the ambient temperature of the temperature sensor 10 rises and the base voltage of the transistor Tr 1 falls. When the operating temperature is exceeded, the transistor Tr 1 is turned off, the bidirectional thyristor Tr 2 is turned off, the relay coil Re is turned off, the contact Cr is opened, the heating element 6 is turned off, and the fire is prevented. .
発明が解決しようとする問題点 しかし、このような構造のものでは、ガード８の前面
の一部（温度センサ10を除く部分）が可燃物13に覆われ
た場合には、発熱体６がオフするまでの時間が長かった
り、オフしなかったりして、可燃物13の温度が急速に上
昇し発火してしまうという問題があった。これは下記の
理由による。However, with such a structure, when a part of the front surface of the guard 8 (a part excluding the temperature sensor 10) is covered with the combustible material 13, the heating element 6 is turned off. There was a problem that the temperature of the combustible material 13 rapidly rises and ignites because it takes a long time or it is not turned off. This is for the following reason.
つまり、第５図のように可燃物13がガード８の前面の
一部を覆い温度センサ10の周囲を覆わない時には温度セ
ンサ10の雰囲気温度は、ほとんど上昇しないので、トラ
ンジスタTr1のベース電圧も変わらず、トランジスタTr1
はオン状態で、双方向性サイリスタTr2もオン状態とな
り、発熱体６は通電状態のままで、可燃物13の温度は発
熱体６からの、ふく射熱と対流により急速に上昇し、つ
いには発火してしまうのであった。That is, as shown in FIG. 5, when the combustible material 13 covers a part of the front surface of the guard 8 and does not cover the periphery of the temperature sensor 10, the ambient temperature of the temperature sensor 10 hardly rises, so that the base voltage of the transistor Tr 1 also increases. Unchanged, transistor Tr 1
Is on, the bidirectional thyristor Tr 2 is also on, the heating element 6 remains energized, and the temperature of the combustible material 13 rapidly rises due to radiant heat and convection from the heating element 6, and finally ignition occurs. It did.
そこで、本発明は可燃物が電気ストーブ本体前面の一
部を覆った時でも、すぐに発熱体への通電を止め、可燃
物の発火を防止するものである。Therefore, the present invention prevents the ignition of the combustible material by immediately stopping the energization of the heating element even when the combustible material covers a part of the front surface of the electric stove body.
問題点を解決するための手段 そして上記問題点を解決する本発明の技術的な手段は
上記本体前面の反射板より下部に発信素子と受信素子と
を設け、少なくとも１つ以上の反射体を本体前面の反射
板より上部または下部に設けたものである。Means for Solving the Problems And the technical means for solving the above problems according to the present invention is to provide a transmitting element and a receiving element below a reflection plate on the front surface of the main body, and provide at least one or more reflectors on the main body. It is provided above or below the front reflector.
作用 この技術的手段による作用は次のようになる。Action The action of this technical means is as follows.
すなわち、正常時は発信素子から発信された信号は、
本体前面上下の反射体で反射され受信素子で受信されて
いる。受信されている時には、発熱体は通電状態であ
る。また発熱体からの光は反射板とガード部材とによっ
て平行光線に近い状態で前方に向う。次に本体前面の一
部が可燃物で覆われた時には、信号が可燃物により寸断
され受信部まで到達しないので、発熱体はオフ状態とな
る。That is, the signal transmitted from the transmitting element is normally
It is reflected by the reflectors on the top and bottom of the main body and received by the receiving element. When being received, the heating element is energized. Further, the light from the heating element is directed forward by the reflector and the guard member in a state close to parallel rays. Next, when a part of the front surface of the main body is covered with a combustible material, the signal is cut off by the combustible material and does not reach the receiving portion, so that the heating element is turned off.
この結果、可燃物等が本体前面の一部を覆った場合で
も従来のように、発熱体は通電状態のままではなく、す
ぐにオフ状態となるので、可燃物の発火を未然に防ぐこ
とができる。As a result, even when a combustible material covers a part of the front surface of the main body, the heating element does not remain in the energized state as in the past, but immediately turns off, so that the ignition of the combustible material can be prevented. it can.
実施例 以下、本発明の一実施例を添付図面にもとづいて説明
する。Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings.
第１図，第２図において、20は前面が開口した本体
で、この本体20内には、２本の高温輻射ヒータ21とこの
高温輻射ヒータ21の背面には、アルミニウム製の反射板
22と、前面には第３図に示すようなアルミニウムの薄板
で六角柱が互いに平行に隣接しハニカム状に構成した多
項部材から成るガード23が設けられている。そして本体
20前面下部の片側には、発信素子としての集光ランプ24
と反対側には受信素子としてCdSセンサ25が設けられて
いる。そして集光ランプ24から発光された光を反射する
ための反射体26,27が本体20前面上部に、反射体28が本
体前面下部に設けられている。In FIGS. 1 and 2, reference numeral 20 denotes a main body having an open front surface. Inside the main body 20, two high temperature radiant heaters 21 and a rear surface of the high temperature radiant heater 21 are made of an aluminum reflector plate.
22 and a guard 23, which is a polynomial member in which hexagonal columns are adjacent to each other in parallel with each other and which are thin plates of aluminum and are formed in a honeycomb shape, are provided on the front surface. And the body
20 On one side of the lower part of the front side,
A CdS sensor 25 is provided as a receiving element on the opposite side. Further, reflectors 26 and 27 for reflecting the light emitted from the condenser lamp 24 are provided on the upper front surface of the main body 20, and a reflector 28 is provided on the lower front surface of the main body.
次に、この一実施例の構成における作用を説明する。
先ず正常時は集光ランプ24から発光された光は、ガード
23前面を上方向へ向い反射体26で反射され下方向へ向
う、さらに反射体28で反射され上方向へ向い、次に反射
体27で反射され、下方向へ向いCdSセンサ25で受光され
る。このとき第４図に示す電気回路において、CdSセン
サ25の検出電位V-は、基準電位V+より低くなるのでトラ
ンジスタTr1のベース電圧Vb1はHiとなり、リレーReは閉
じ高温輻射ヒータ21は通電状態となる。一方、第２図、
第３図に示すように高温輻射ヒータ21から発光された光
の一部は反射板22で反射され、平行光線となって前方へ
向い、残りの光もハニカム状のガード23を通過すること
により拡散が押さえられ平行光線に近い状態で前方へ向
い、CdSセンサ25に入光することはない。次に可燃物29
が本体20前面の一部を覆った場合について説明する。こ
の場合集光ランプ24から発光され反射体26,27,28で反射
されCdSセンサ25へ受光されている光は、可燃物29によ
り寸断され、CdSセンサ25へ到達されない。したがって
電気回路の検出電位Ｖ−は基準電位V+より高くなるので
トランジスタTr1ベース電圧Vb1はLoとなり、リレーReは
開き高温輻射ヒータ21はオフ状態となる。この時トラン
ジスタTr2のベース電圧Vb2もLoとなりV-はHiになり、こ
の状態はふたたびCdSセンサ25の抵抗が変化しても保持
される。ただし発光ダイオード30は電源スイッチSW1と
連動しているので点灯のままである。Next, the operation of the configuration of this embodiment will be described.
First of all, in normal condition, the light emitted from the condenser lamp 24
23 The front surface is directed upwards and is reflected by the reflector 26, and is directed downward.Further, it is reflected by the reflector 28 and directed upward, then is reflected by the reflector 27 and is received by the CdS sensor 25, which is directed downward. . At this time, in the electric circuit shown in FIG. 4, the detection potential V − of the CdS sensor 25 becomes lower than the reference potential V + , so the base voltage Vb 1 of the transistor Tr 1 becomes Hi, the relay Re is closed, and the high temperature radiant heater 21 is It is energized. On the other hand, FIG.
As shown in FIG. 3, a part of the light emitted from the high temperature radiant heater 21 is reflected by the reflection plate 22 and becomes a parallel light beam, which is directed forward, and the remaining light also passes through the honeycomb guard 23. The CdS sensor 25 does not enter the CdS sensor 25 because the diffusion is suppressed and the light is directed forward in a state close to parallel rays. Then combustibles 29
A case in which a part of the front surface of the main body 20 is covered will be described. In this case, the light emitted from the condenser lamp 24, reflected by the reflectors 26, 27, 28 and received by the CdS sensor 25 is cut off by the combustible material 29 and does not reach the CdS sensor 25. Therefore, the detection potential V− of the electric circuit becomes higher than the reference potential V + , the transistor Tr 1 base voltage Vb 1 becomes Lo, the relay Re is opened, and the high temperature radiant heater 21 is turned off. In this case transistor Tr 2 of the base voltage Vb 2 also becomes Lo V - becomes Hi, the state is maintained even if the change is again the resistance of CdS sensor 25. However, since the light emitting diode 30 is linked with the power switch SW 1 , it remains lit.
この結果、可燃物29は温度上昇せず、発火を未然に防
ぐことができる。しかも高温輻射ヒータ21からの光が、
CdSセンサ25に入光することがないため、可燃物29を検
知する精度は高い。さらに本実施例において集光ランプ
24とCdSセンサ25の角度を調節し、反射体26,27,28の数
を増やし、ガード23前面を縦断する信号の数を多くする
と、より小さな可燃物29に対しても信号は寸断されるこ
とになり、さらに安全性は向上される。As a result, the temperature of the combustible material 29 does not rise and ignition can be prevented. Moreover, the light from the high temperature radiant heater 21
Since the CdS sensor 25 does not enter the light, the accuracy of detecting the combustible material 29 is high. Further, in this embodiment, a condenser lamp
By adjusting the angle between 24 and the CdS sensor 25, increasing the number of reflectors 26, 27, 28 and increasing the number of signals traversing the front surface of the guard 23, the signals will be disrupted even for smaller combustibles 29. Therefore, the safety is further improved.
また本実施例においては、一般に熱には弱い集光ラン
プ24とCdSセンサ25が本体20前面の下部に設けられてい
るので高温輻射ヒータ21の影響をほとんど受けず低温雰
囲気に保たれ温度上昇による誤動作を防止し、寿命も長
くすることができる。Further, in this embodiment, since the condenser lamp 24 and the CdS sensor 25, which are generally weak against heat, are provided in the lower part of the front surface of the main body 20, they are hardly affected by the high temperature radiant heater 21 and are kept in a low temperature atmosphere, so that the temperature rises Malfunctions can be prevented and the service life can be extended.
発明の効果 本発明は、発熱体の前面にガード部材、背面に反射板
とを設け本体前面の反射板より下部に発信素子と受信素
子とを設け、また本体前面の反射板より上部または下部
に１つ以上の反射体を設けたものであるので可燃物が電
気ストーブ本体前面の一部を覆った時発信素子から受信
素子への信号が遮断され発熱体への通電を止めるので可
燃物の発火を防止することができ、発熱体からの光は反
射板とガード部材とによって平行光線に近い状態で前方
へ向うため受信素子に入光することがなく、可燃物検知
の精度を高めることができ、さらに発信素子，受信素子
の雰囲気温度を低く保ち、それらの誤動作を防止し、寿
命も長くすることができる。Advantageous Effects of Invention The present invention provides a guard member on the front surface of a heating element, a reflector on the back surface, a transmitting element and a receiving element below the reflector on the front of the main body, and above or below the reflector on the front of the main body. Since one or more reflectors are provided, when the combustible material covers a part of the front surface of the electric stove, the signal from the transmitting element to the receiving element is cut off and the power supply to the heating element is stopped, so that the combustible material is ignited. Since the light from the heating element goes forward in a state close to parallel rays by the reflection plate and the guard member, it does not enter the receiving element and the accuracy of combustible material detection can be improved. In addition, the ambient temperature of the transmitting element and the receiving element can be kept low, their malfunctions can be prevented, and the service life can be extended.
第１図は本発明の一実施例の電気ストーブの正面図、第
２図は同電気ストーブの縦断面図、第３図は同電気スト
ーブのガード部材の斜視図、第４図は同電気ストーブの
電気回路図、第５図は従来の電気ストーブの正面図、第
６図は従来の電気ストーブの縦断面図、第７図は従来の
電気ストーブの電気回路図である。 20……本体、21……発熱体（高温輻射ヒータ）、22……
反射板、23……ガード部材、24……発信素子（集光ラン
プ）、25……受信素子（CdSセンサ）、26,27,28……反
射体、30……表示ランプ（発光ダイオード）。1 is a front view of an electric stove according to an embodiment of the present invention, FIG. 2 is a vertical sectional view of the electric stove, FIG. 3 is a perspective view of a guard member of the electric stove, and FIG. 4 is the electric stove. 5 is a front view of a conventional electric stove, FIG. 6 is a longitudinal sectional view of the conventional electric stove, and FIG. 7 is an electric circuit diagram of the conventional electric stove. 20 …… Main body, 21 …… Heating element (high-temperature radiant heater), 22 ……
Reflector, 23 ... Guard member, 24 ... Transmitting element (condensing lamp), 25 ... Receiving element (CdS sensor), 26, 27, 28 ... Reflector, 30 ... Display lamp (light emitting diode).
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭48−100182（ＪＰ，Ｕ) 実開 昭51−130574（ＪＰ，Ｕ) 実開 昭52−18680（ＪＰ，Ｕ) 実公 昭59−2447（ＪＰ，Ｙ２) 実公 昭51−41618（ＪＰ，Ｙ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Shown in 48-100182 (JP, U) Shown in 51-130574 (JP, U) Shown in 52-18680 (JP, U) Shown in 59- 2447 (JP, Y2) Actual public Sho 51-41618 (JP, Y2)
Claims (1)
設けられた発熱体と、この発熱体前面に設けられたガー
ド部材とこの発熱体の背面に設けられた反射板と、前記
本体に設けられた発信素子と、この発信素子から発信さ
れた信号を受信する受信素子と、前記発信素子の信号を
受信素子が受信している時には、前記発熱体をオンし、
受信していない時にはオフするスイッチング回路とを備
え、前記発信素子、受信素子は、前記本体前面の前記反
射板より下部に設け、前記本体には前記発信素子からの
発信信号を前記受信素子の方向へ反射する１つ以上の反
射体を前記本体前面の前記反射板より上部または下部に
設けてなる電気ストーブ。1. A main body having an opening on the front surface, a heating element provided on the opening of the main body, a guard member provided on the front surface of the heating element, a reflection plate provided on the back surface of the heating element, and the main body. A transmitting element provided in, a receiving element for receiving a signal transmitted from this transmitting element, and when the receiving element is receiving the signal of the transmitting element, the heating element is turned on,
A switching circuit which is turned off when not receiving, the transmitting element and the receiving element are provided below the reflection plate on the front surface of the main body, and a transmission signal from the transmitting element is directed to the main body in the direction of the receiving element. An electric stove provided with one or more reflectors that reflect to the front of the body above or below the reflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61305729A JPH081306B2 (en) | 1986-12-22 | 1986-12-22 | Electric stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61305729A JPH081306B2 (en) | 1986-12-22 | 1986-12-22 | Electric stove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63156937A JPS63156937A (en) | 1988-06-30 |
| JPH081306B2 true JPH081306B2 (en) | 1996-01-10 |
Family
ID=17948642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61305729A Expired - Lifetime JPH081306B2 (en) | 1986-12-22 | 1986-12-22 | Electric stove |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH081306B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5401735B2 (en) * | 2008-07-17 | 2014-01-29 | 株式会社千石 | Electric stove safety device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48100182U (en) * | 1972-02-26 | 1973-11-26 | ||
| JPS5141618U (en) * | 1974-09-24 | 1976-03-27 | ||
| JPS51130574U (en) * | 1975-04-15 | 1976-10-21 | ||
| JPS5218680U (en) * | 1975-07-28 | 1977-02-09 | ||
| JPS592447U (en) * | 1982-06-25 | 1984-01-09 | アイコ−株式会社 | spray nozzle |
-
1986
- 1986-12-22 JP JP61305729A patent/JPH081306B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63156937A (en) | 1988-06-30 |
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