JP2793016B2 - Heating device heater switching device - Google Patents
Heating device heater switching deviceInfo
- Publication number
- JP2793016B2 JP2793016B2 JP2153305A JP15330590A JP2793016B2 JP 2793016 B2 JP2793016 B2 JP 2793016B2 JP 2153305 A JP2153305 A JP 2153305A JP 15330590 A JP15330590 A JP 15330590A JP 2793016 B2 JP2793016 B2 JP 2793016B2
- Authority
- JP
- Japan
- Prior art keywords
- heater
- switch
- contact
- series
- relay
- 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 - Fee Related
Links
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
- Cookers (AREA)
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。The present invention relates to a heater switching device for a heating device such as an electric pot.
（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100V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。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62−18932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。(B) Conventional technology Small electric kettles and hair dryers are essential items to carry when traveling abroad. However, since the commercial power supply is divided into 100V and 200V countries overseas, a voltage detection circuit drives a relay according to the supplied commercial power, operates two changeover switches, and connects two heaters in series. Or they are connected in parallel. That is, if the supplied commercial power is 100 V, two heaters are connected in parallel, and if the supplied commercial power is 200 V, two heaters are connected in series so that the total heat generation in each connection state is approximately the same. Make up. In such a configuration, when high-voltage commercial power is supplied when the respective heaters are connected in parallel by the changeover switch, the detection circuit detects the voltage and then relays. Is driven to operate each switch and connect each heater in series.However, the detection circuit detects that a high voltage is supplied, and the relay operates to activate each switch. Since a time delay occurs, a high voltage is applied to the parallel circuit of each heater.
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, an arc current flows between the contacts of the switch when the switch is operated, and there is a disadvantage or danger that the contact of the switch is welded or defective, and the lead wire is burnt.
This is particularly remarkable when a relay contact is used as a switch as shown in the above-mentioned prior art. However, since the heater generates a relatively large amount of heat and is portable, the switch is not used. However, there is a restriction that a semiconductor control element that requires a large heat sink cannot be used, and it has been difficult to take countermeasures.
（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 reduces the arc current generated at the contact of a switch that switches a heater in series / parallel to prevent welding and failure of the contact.
（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 Problems A first heater, a second heater, and the first heater and the second heater.
The first and second heaters are connected in series and parallel, and
And a second switch, a protection resistor, and a detection circuit having a relay that operates the first and second switches according to a supply voltage. When the supply voltage is low, the relay switches the first switch. Is connected to the connection between the first heater and the second heater, and one contact of the second switch is switched to connect the second heater and the protection resistor in series to connect the first heater and the second heater. When the supply 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, the first heater, and the second heater Are connected in series.
（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 a high or low power supply voltage by a detection circuit and operates two switches by the detection circuit to connect two heaters in parallel or in series. In the case of a high voltage, each heater is connected in series via each contact of the two switches.
（ヘ） 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、その一端を前記第１ヒ
ータ（１）の一端に接続している。（３）は前記第１ヒ
ータ（１）の両側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、SCR（６）と該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SCR（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た導通素子（８）と、高電
圧（200V）を検出してSCR（６）が導通した時に点灯す
る高電圧供給用の表示器（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）、（13
c）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スイッチで、可動接点（14
a）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（15）を介して交流電源（A
C）に接続し可動接点（14a）は第２ヒータ（２）の他端
に接続し他方の接点（14c）は前記第１スイッチ（13）
の他方の接点（13c）に接続している。前記保護抵抗（1
5）は第２スイッチ（14）の切換時における短絡回路を
防ぐものである。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。(F) Example An example of the present invention will be described with reference to the drawings. (1) is a first heater, and (2) is a second heater wound around the same substrate (not shown) as the first heater, one end of which is connected to one end of the first heater (1). (3) is a supply voltage detection circuit connected between both sides of the first heater (1),
A resistor (4), a constant voltage element (5) connected in series with the resistor for setting a detection voltage, and an SCR (6) and a relay (7) connected to the SCR to operate first and second switches described later. )
And a gate of the SCR (6), a conducting element (8) connected to a connection between the constant voltage element (5) and the resistor (4), and a high voltage (200V) to detect the SCR (6). It has a high-voltage supply indicator (9) that lights up when it is turned on, a step-down resistor (10), a diode (11), and an electrolytic capacitor (12). (13) is a first switch operated by the relay (7), and has a movable contact (13a) and two contacts (13b), (13).
c), and one contact (13b) is connected to the connection between the first heater (1) and the second heater (2), and the movable contact (13a) is connected to an AC power supply (AC). I have. (14) is a second switch operated by the detection circuit (3) in conjunction with the first switch (13).
a) and two contacts (14b) and (14c), and one contact (14b) is connected to an AC power source (A) via a protection resistor (15).
C), the movable contact (14a) is connected to the other end of the second heater (2), and the other contact (14c) is connected to the first switch (13).
Connected to the other contact (13c). The protection resistor (1
5) prevents a short circuit when the second switch (14) is switched. The other end of the first heater (1) and the end of the protection resistor (15) are connected to an AC power supply (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（13
a）、（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, the operation will be described. In a normal state, each movable contact (13) of the first switch (13) and the second switch (14)
a) and (14a) are connected to respective one contacts (13b) and (14b) as shown by solid lines in the drawing, and the first switch (13)
The movable contact (13a) of the second switch (14) is connected to the connecting portion of 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 protection 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 movable contact (13a) of the first switch (13). ) And one contact (13b) are connected to an AC power supply (AC).
今、ここで供給される交流電源電圧が低電圧（100V）
の場合は、第１ヒータ（１）の両端に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（15
0V）以下であるために該導通素子は導通せずSCR（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100V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 low voltage (100V)
In the case of (1), 100 V is applied to both ends of the first heater (1), but the conduction voltage (15) of the constant voltage element (5) of the detection circuit (3) is applied.
0V) or less, the conducting element does not conduct and the SCR (6)
Is turned off, each switch does not operate, and 100 V is applied to the series circuit of the first heater (1), the second heater (2) and the protection resistor (15). At this time, the indicator (9) does not light.
そして、供給される交流電源電圧が高電圧（200V）の
場合は、供給と同時に第１ヒータ（１）の両端に200V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SCR（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）、（1
4）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（13c）、（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（14
a）と他方の接点（14c）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）、（14
a）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。When the supplied AC power supply voltage is a high voltage (200 V), 200 V is applied to both ends of the first heater (1) simultaneously with the supply, so that the constant voltage element (5) becomes conductive and the conductive element (8) Is turned on, the SCR (6) is turned on, and the relay (7) is driven to drive the first and second switches (13), (1).
4) Each of the movable contacts (13a) and (14a) is switched to the broken line position and connected to the other contact (13c) and (14c) of each switch, and the movable contact (13a) of the first switch (13) And the other contact (13c) and the movable contact (14) of the second switch (14).
a) and the other contact (14c), the first heater (1), and the second
The heater (2) is connected in series and the display (9) is turned on. First, the switching connection between the movable contacts (13a) and (14a) of each switch and the other contacts (13c) and (14c) as described above.
When switching from the parallel circuit of the second heaters (1) and (2) to the series circuit, the movable contacts (13a) and (14
By switching a) to the other contacts (13c) and (14c), the first heater (1) and the second heater (2) are connected 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) Effect of the Invention As described above, according to the present invention, when the supply 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 of the detection circuit. The other contact, the first heater and the second heater are connected in series, and in the case of a 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. Since the switches are connected in series, the occurrence of arc current at the time of switching connection from one contact of the switch to the other contact is reduced, and there is no welding or defective contact of the contacts.
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。The drawing shows the electric circuit of the heater switching device of the heating device of 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 contacts,
(14b), (14c) ... contact, (15) ... protection resistance.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭58−195429（ＪＰ，Ａ) 特開 昭58−127523（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H02J 3/00 - 5/00 G05F 5/00────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-195429 (JP, A) JP-A-58-127523 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) H02J 3/00-5/00 G05F 5/00
Claims (1)
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 for switching and connecting each of the first and second heaters in series and in parallel, a protection resistor, and a supply voltage. And a detection circuit having a relay for operating the first and second switches in accordance with the condition. When the supply voltage is low, one contact of the first switch is connected to the first heater and the second heater by the relay. A first heater and a second heater are connected in parallel by switching connection to a connection portion of the heater and switching one contact of a second switch to connect the second heater and the protection resistor in series;
When the supply 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. A heater switching device for a heating appliance.
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 JPH0446526A (en) | 1992-02-17 |
| JP2793016B2 true JP2793016B2 (en) | 1998-09-03 |
| JP2793016B6 JP2793016B6 (en) | 2008-10-08 |
Family
ID=
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0446526A (en) | 1992-02-17 |
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