JPH0446526A - Heater switching device for heating implement - Google Patents
Heater switching device for heating implementInfo
- Publication number
- JPH0446526A JPH0446526A JP2153305A JP15330590A JPH0446526A JP H0446526 A JPH0446526 A JP H0446526A JP 2153305 A JP2153305 A JP 2153305A JP 15330590 A JP15330590 A JP 15330590A JP H0446526 A JPH0446526 A JP H0446526A
- Authority
- JP
- Japan
- Prior art keywords
- heater
- switch
- contact
- series
- voltage
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims description 4
- 230000001681 protective effect Effects 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 13
- 238000003466 welding Methods 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
- Cookers (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は電気ポット等の加熱器具のヒータ切換装置に関
する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a heater switching device for a heating appliance such as an electric kettle.
（ロ）従来の技術
海外旅行時には小型の電気ポットやヘアードライヤーは
携行必需品となっている。ところが、海外においては商
用電源が大別して１００■国と２００Ｖ国とがあるため
供給されている商用電源に応じて電圧検出回路によりリ
レーを駆動して２つの切換スイッチを操作し２つのヒー
タを直列接続したり或は並列接続するようにしている。(b) Conventional technology A small electric kettle and hair dryer are essential items to carry when traveling abroad. However, in overseas countries, there are roughly 100 countries and 200V countries with commercial power supplies, so depending on the commercial power supply, a voltage detection circuit drives a relay, operates two changeover switches, and connects two heaters in series. They are connected or connected in parallel.
すなわち、供給されている商用電源が１００Ｖの場合に
は２つのヒータを並列接続し、２００ｖの場合には２つ
のヒータを直列接続して各々の接続状態における総発熱
量が略同じになる様に構成している。（特開昭６２−１
８９３２号公報）
この様な構成において、切換スイッチによって各々のヒ
ータが並列接続されている場合に高電圧の商用電源が供
給された時には検出回路がその電圧を検出した後リレー
を駆動して各々のスイッチを作動し各々のヒータを直列
接続するわけであるが、高電圧が供給されたことを検出
回路が検出してリレーが作動し各々のスイッチが作動す
るまでに若干の時間遅れを生ずるため各々のヒータの並
列回路に高電圧が印加されることになる。In other words, if the commercial power supply is 100V, connect the two heaters in parallel, and if the power supply is 200V, connect the two heaters in series so that the total amount of heat generated in each connection is approximately the same. It consists of (Unexamined Japanese Patent Publication No. 62-1
(No. 8932 Publication) In such a configuration, when high-voltage commercial power is supplied when each heater is connected in parallel by a changeover switch, the detection circuit detects the voltage and then drives the relay to switch between each heater. The switch is activated and each heater is connected in series, but there is a slight time delay between when the detection circuit detects that high voltage is supplied, the relay is activated, and each switch is activated. A high voltage will be applied to the parallel circuit of the heaters.
このため、スイッチの作動時に該スイッチの接点間にア
ーク電流が流れることになり、スイッチの接点溶着や接
点不良及びリード線が焼損する欠点や危険があった。こ
のことは、特に前述の先行技術に示す様にリレー接点を
スイッチとして用いる場合に顕著であるがヒータの発熱
量が比較的大きくて携帯用であるため本体を小型化にす
るようなものにおいてはスイッチとして大きな放熱板を
必要とするような半導体制御素子を用いることができな
いという制約がありその対策が困難であった。For this reason, when the switch is operated, an arc current flows between the contacts of the switch, resulting in disadvantages and dangers such as welding of the contacts of the switch, failure of the contacts, and burnout of the lead wires. This is particularly noticeable when relay contacts are used as switches as shown in the prior art mentioned above, but in devices where the heater generates a relatively large amount of heat and is portable, the main body must be miniaturized. There is a restriction that it is not possible to use a semiconductor control element that requires a large heat sink as a switch, and it has been difficult to take countermeasures against this problem.
（ハ）発明が解決しようとする課題
本発明は、ヒータを直並列に切換えるスイッチの接点に
生ずるアーク電流を少なくして接点の溶着、不良を防止
する。(c) Problems to be Solved by the Invention The present invention prevents welding and failure of the contacts by reducing the arc current generated at the contacts of a switch that switches heaters in series and parallel.
（ニ）課題を解決するための手段
第１ヒータと、第２ヒータと、前記第１ヒータと第２ヒ
ータの各々を直並列に切換接続し各々が連動した第１及
び第２スイッチと、保護抵抗と、供給電圧に応じて前記
第１及び第２スイッチを作動するリレーを有した検出回
路とを備え、供給電圧が低電圧の時は前記リレーによっ
て前記第１スイッチの一方の接点を前記第１ヒータと第
２ヒータの接続部に切換接続し第２スイッチの一方の接
点を第２ヒータと保護抵抗を直列接続するように切換え
て第１ヒータと第２ヒータを並列接続し、供給電圧が高
電圧の時は前記リレーによって第１スイッチの他方の接
点と第２スイッチの他方の接点を切換接続して各々のス
イッチの他方の接点と第１ヒータと第２ヒータを直列接
続する構成としたものである。(d) Means for solving the problem: a first heater, a second heater, first and second switches that switch and connect each of the first heater and second heater in series and parallel and are linked to each other, and protection. a detection circuit having a resistor and a relay for activating the first and second switches in response to a supply voltage; when the supply voltage is low, the relay causes one contact of the first switch to be connected to the first switch; The first heater and the second heater are connected in parallel by switching one contact of the second switch to connect the second heater and the protective resistor in series, and connecting the first heater and the second heater in parallel. When the voltage is high, the other contact of the first switch and the other contact of the second switch are switched and connected by the relay, and the other contact of each switch is connected in series with the first heater and the second heater. It is something.
（ホ）作用
本発明は、電源電圧の高、低を検出回路によって検出し
該検出回路によって２つのスイッチを作動して２つのヒ
ータを並列接続或は直列接続するものであって、供給電
圧が高電圧の場合には２つのスイッチの各々の接点を介
して各々のヒータを直列接続する。(E) Function The present invention detects whether the supply voltage is high or low using a detection circuit, and the detection circuit operates two switches to connect two heaters in parallel or in series, and the supply voltage is In the case of high voltages, each heater is connected in series via the contacts of each of the two switches.
（−＼）実施例
本発明の実施例を図面に基づいて説明する。（１）は第
１ヒータ、（２）は該第１ヒータと同じ基板（図示せず
）に巻き付けた第２ヒータで、その−端を前記第１ヒー
タ（１）の一端に接続している。(-\)Example An example of the present invention will be described based on the drawings. (1) is a first heater, and (2) is a second heater wrapped around the same substrate (not shown) as the first heater, the negative end of which is connected to one end of the first heater (1). .
（３）は前記第１ヒータ（１）の両端間に接続した供給
電圧の検出回路で、抵抗（４）と該抵抗に直列接続した
検出電圧設定用の定電圧素子（５）と、５ＣＲ（６）と
、ｔ＊ｓｃＲに直列接続した後で述べる第１及び第２ス
イッチを作動するリレー（７）と、前記５ＣＲ（６）の
ゲートと、定電圧素子（５）と抵抗（４）との接続部に
接続し７た導通素子（８）と、高電圧（２００Ｖ）を検
出して５ＣＲ（６）が導通した時に点灯する高電圧供給
用の表示ｒ：＞（９）と、降圧抵抗（１０）、ダイオー
ド（１１）と、電解コンデンサ（１２）とを有している
。（１３）は前記リレー（７）によって作動する第１ス
イッチで、可動接点（１３ａ）と２つの接点（１３ｂ）
、（１３ｃ）を有しており、一方の接点（１３ｂ）は前
記第１ヒータ（１）と第２ヒータ（２）の接続部に接続
し可動接点（１３ａ）は交流電源（ＡＣ）に接続してい
る。（１４）は前記第１スイッチ（１３）と共に連動し
て前記検出回路（３）により作動する第２スイツヂで、
可動接点（１４ａ）と２つの接点（１４ｂ）、（１４ｃ
）を有しており、一方の接点（１４ｂ）は保護抵抗（１
５）を介して交流電源（ＡＣ）に接続し可動接点（１４
ａ）は第２ヒータ（２）の他端に接続し他方の接点（１
４ｃ）は前記第１スイッチ（１３）の他方の接点（１３
ｃ）に接続している。前記保護抵抗（１５）は第２スイ
ッチ（１４）の切換時における短緒回路を防ぐものであ
る。(3) is a supply voltage detection circuit connected between both ends of the first heater (1), which includes a resistor (4), a constant voltage element (5) connected in series with the resistor for setting the detection voltage, and a 5CR ( 6), a relay (7) that is connected in series to t*scR and operates the first and second switches described later, the gate of the 5CR (6), a constant voltage element (5), and a resistor (4). The conduction element (8) connected to the connection part of 7, the high voltage supply display r: > (9) that lights up when 5CR (6) detects high voltage (200V) and becomes conductive, and the step-down resistor. (10), a diode (11), and an electrolytic capacitor (12). (13) is a first switch operated by the relay (7), which has a movable contact (13a) and two contacts (13b).
, (13c), one contact (13b) is connected to the connection part of the first heater (1) and the second heater (2), and the movable contact (13a) is connected to an alternating current power source (AC). are doing. (14) is a second switch operated by the detection circuit (3) in conjunction with the first switch (13);
A movable contact (14a) and two contacts (14b), (14c)
), and one contact (14b) has a protective resistor (1
5) to the alternating current power supply (AC) through the movable contact (14
a) is connected to the other end of the second heater (2) and the other contact (1
4c) is the other contact (13) of the first switch (13).
c). The protective resistor (15) prevents a short circuit when the second switch (14) is switched.
前記第１ヒータ（１）の他端と保護抵抗（１５）の端部
とを交流電源（ＡＣ）に接続している。The other end of the first heater (1) and the end of the protective resistor (15) are connected to an alternating current power source (AC).
次に動作について述べる。通常の状態では第１スイッチ
（１３）と第２スイッチ（１４）の各々の可動接点（１
３ａ）、（１４ａ）は図面の実線で示す様に各々の一方
の接点（１３ｂ）、（１４ｂ）に接続しており、第１ス
イッチ（１３）の可動接点（１３ａ）は第１ヒータ（１
）と第２ヒータ（２）の接続部に接続し、第２スイッチ
（１４）の可動接点（１４ａ）は一方の接点（１４ｂ）
と接続して第２ヒータ（２）と保護抵抗（１５）を直列
接続し、第１ヒータ（１）と第２ヒータ（２）を並列接
続し、この並列回路を第１スイッチ（１３）の可動接点
（１３ａ）と一方の接点（１３ｂ）とによって交流電源
（ＡＣ）に接続している。Next, we will discuss the operation. Under normal conditions, each movable contact (1) of the first switch (13) and the second switch (14)
3a) and (14a) are connected to one of the contacts (13b) and (14b), respectively, as shown by the solid line in the drawing, and the movable contact (13a) of the first switch (13) is connected to the first heater (1
) and the second heater (2), and the movable contact (14a) of the second switch (14) is connected to one contact (14b).
The second heater (2) and the protective resistor (15) are connected in series, the first heater (1) and the second heater (2) are connected in parallel, and this parallel circuit is connected to the first switch (13). It is connected to an alternating current power source (AC) through a movable contact (13a) and one contact (13b).
今、ここで供給される交流電源電圧が低電圧（１００■
）ノ場合は、第１ヒータ（１）（７）両端に１００Ｖが
印加されるが、検出回路（３）の定電圧素子（５）の導
通電圧（１５０Ｖ）以下であるために該導通素子は導通
せず５ＣＲ（６）は遮断しているため各々のスイッチが
作動せず第１ヒータ（１）、第２ヒータ（２）と保護抵
抗（１５）の直列回路に１００■が印加される。この時
表示器（９）は点灯しない。Now, the AC power supply voltage supplied here is a low voltage (100
), 100V is applied across the first heaters (1) and (7), but since it is lower than the conduction voltage (150V) of the constant voltage element (5) of the detection circuit (3), the conduction element is Since there is no conduction and 5CR (6) is cut off, each switch does not operate, and 100 cm is applied to the series circuit of the first heater (1), second heater (2), and protective resistor (15). At this time, the indicator (9) does not light up.
そして、供給される交流電源電圧が高電圧（２００■）
の場合は、供給と同時に第１ヒータ（１）の両端に２０
０■が印加されるため定電圧素子（５）が導通し導通素
子（８）が導通状態となって５ＣＲ（６）を導通せしめ
リレー（７）を駆動して第１及び第２スイッチ（１３）
、（１４）の各々の可動接点（１３ａ）、（１４ａ）を
破線位置に切換えて各々のスイッチの他方の接点（１３
Ｃ）、（１４ｃ）に接続し、第１スイッチ（１３）の可
動接点（１３ａ）と他方の接点（１３ｃ）と、第２スイ
ッチ（１４）の可動接点（１４ａ）と他方の接点（１４
ｃ）と、第１ヒータ（１）と、第２ヒータ（２）を直列
接続し表示器（９）が点灯する。前述の様な各々のスイ
ッチの可動接点（１３ａ）、（１４ａ）と他方の接点（
１３ｃ）、（１４Ｃ）との切換接続による第１、第２ヒ
ータ（１）、（２）の並列回路から直列回路への切換時
には、各々のスイッチの可動接点（１３ａ）、（１４ａ
）が他方の接点（１３ｃ）、（１４ｃ）に切換ることに
より第１ヒータ（１）と第２ヒータ（２）が直列接続さ
れることになる。And the AC power supply voltage supplied is high voltage (200■)
In the case of
Since 0■ is applied, the constant voltage element (5) becomes conductive, and the conductive element (8) becomes conductive, making 5CR (6) conductive, driving the relay (7), and switching on the first and second switches (13). )
, (14) are switched to the dashed line position, and the other contact (13a) of each switch is switched to the position shown by the broken line.
C), (14c), the movable contact (13a) and the other contact (13c) of the first switch (13), and the movable contact (14a) and the other contact (14) of the second switch (14).
c), the first heater (1), and the second heater (2) are connected in series, and the indicator (9) lights up. The movable contacts (13a), (14a) of each switch as described above and the other contact (
13c), (14C) when switching from a parallel circuit to a series circuit of the first and second heaters (1), (2), the movable contacts (13a), (14a) of each switch
) is switched to the other contacts (13c) and (14c), thereby connecting the first heater (1) and the second heater (2) in series.
（ト）発明の効果
以上の様に本発明は、供給電圧が高電圧の時は検出回路
のリレーにより、第１スイッチの他方の接点と第２スイ
ッチの他方の接点を切換接続して各々の他方の接点と第
１ヒータと第２ヒータを直列接続し、高電圧の場合には
リレーにより第１及び第２スイッチの各々の他方の接点
が接続されることにより第１ヒータと第２ヒータが直列
接続されるため、各々スイッチの一方の接点から他方の
接点への切換接続時におけるアーク電流の発生が少なく
なり接点の溶着、接点不良がない。(G) Effects of the Invention As described above, the present invention has the advantage of switching and connecting the other contact of the first switch and the other contact of the second switch by the relay of the detection circuit when the supply voltage is high. The other contact, the first heater, and the second heater are connected in series, and in the case of high voltage, the other contact of each of the first and second switches is connected by a relay, so that the first heater and the second heater are connected in series. Since they are connected in series, the generation of arc current when switching from one contact to the other of each switch is reduced, and there is no welding of the contacts or contact failure.
図面は本発明の加熱器具のヒータ切換装置の電気回路で
ある。
（１）・・・第１ヒータ、（２）・・・第２ヒータ、（
３）・・・検出回路、（７）・・・リレー、（１３）・
・・第１スイッチ（１３ａ）・・・可動接点、（１３ｂ
）、（１３Ｃ）−・・接点、＜１４）＝−第２スイッチ
、（１４ａ）−可動接点、（１４ｂ）、（１４ｃ）・・
・接点、（１５）・・保護抵抗。
出願人 三洋電機株式会社 外１名
代理人 弁理士 西野車嗣（外２名）The drawing shows an electric circuit of a heater switching device for a heating appliance according to the present invention. (1)...first heater, (2)...second heater, (
3)...detection circuit, (7)...relay, (13)...
...First switch (13a)...Movable contact, (13b
), (13C) - contact, <14) = - second switch, (14a) - movable contact, (14b), (14c)...
・Contact, (15)...Protective resistance. Applicant: Sanyo Electric Co., Ltd. (1 other person) Attorney: Kuratsugu Nishino (2 others)
Claims (1)
第２ヒータの各々を直並列に切換接続し各々が連動した
第１及び第２スイッチと、保護抵抗と、供給電圧に応じ
て前記第１及び第２スイッチを作動するリレーを有した
検出回路とを備え、供給電圧が低電圧の時は前記リレー
によって前記第１スイッチの一方の接点を前記第１ヒー
タと第２ヒータの接続部に切換接続し第２スイッチの一
方の接点を第２ヒータと保護抵抗を直列接続するように
切換えて第１ヒータと第２ヒータを並列接続し、供給電
圧が高電圧の時は前記リレーによって第１スイッチの他
方の接点と第２スイッチの他方の接点を切換接続して各
々のスイッチの他方の接点と第１ヒータと第２ヒータを
直列接続することを特徴とする加熱器具のヒータ切換装
置。(1) A first heater, a second heater, first and second switches that connect each of the first heater and second heater in series and parallel and are linked to each other, a protective resistor, and a protective resistor according to the supply voltage. a detection circuit having a relay that operates the first and second switches, and when the supply voltage is low, the relay connects one contact of the first switch to the first and second heaters. The first heater and the second heater are connected in parallel by switching one contact of the second switch to connect the second heater and the protective resistor in series, and when the supply voltage is high, the relay Heater switching of a heating appliance characterized in that the other contact of the first switch and the other contact of the second switch are switched and connected to connect the other contact of each switch and the first heater and the second heater in series. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990153305A JP2793016B6 (en) | 1990-06-11 | Heater switching device for heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990153305A JP2793016B6 (en) | 1990-06-11 | Heater switching device for heater |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPH0446526A true JPH0446526A (en) | 1992-02-17 |
| JP2793016B2 JP2793016B2 (en) | 1998-09-03 |
| JP2793016B6 JP2793016B6 (en) | 2008-10-08 |
Family
ID=
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0746918A (en) * | 1994-07-07 | 1995-02-21 | Iseki & Co Ltd | Seedling feeder in seedling planter |
| JPH0837848A (en) * | 1994-09-09 | 1996-02-13 | Iseki & Co Ltd | Seedling table in seedling planter |
| FR2868208A1 (en) * | 2004-03-29 | 2005-09-30 | Linh Trong Nuyen | Field effect transistor with a heterojunction using a semiconductor with a base of gallium and indium phosphide for improved performance |
| US7102106B2 (en) | 2003-11-04 | 2006-09-05 | Edward Joseph Khoury | Domestic appliances |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0746918A (en) * | 1994-07-07 | 1995-02-21 | Iseki & Co Ltd | Seedling feeder in seedling planter |
| JPH0837848A (en) * | 1994-09-09 | 1996-02-13 | Iseki & Co Ltd | Seedling table in seedling planter |
| JP2556301B2 (en) * | 1994-09-09 | 1996-11-20 | 井関農機株式会社 | Seedling table of seedling planting machine |
| US7102106B2 (en) | 2003-11-04 | 2006-09-05 | Edward Joseph Khoury | Domestic appliances |
| FR2868208A1 (en) * | 2004-03-29 | 2005-09-30 | Linh Trong Nuyen | Field effect transistor with a heterojunction using a semiconductor with a base of gallium and indium phosphide for improved performance |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2793016B2 (en) | 1998-09-03 |
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