JPH0115139Y2

JPH0115139Y2 -

Info

Publication number: JPH0115139Y2
Application number: JP1980052322U
Authority: JP
Priority date: 1980-04-16
Filing date: 1980-04-16
Publication date: 1989-05-08
Also published as: JPS56154122U

Description

【考案の詳細な説明】本考案は、電磁弁の有する吸着電圧と保持電圧
が異なるという性質を利用し、吸着時と保持時に
別々の手段で電圧を印加し、吸着及び保持を行な
うことを特徴とする電磁弁駆動装置を提供するも
のである。[Detailed description of the invention] This invention is characterized by utilizing the property that the attraction voltage and holding voltage of the solenoid valve are different, and applying voltage by separate means during attraction and retention to perform attraction and retention. The present invention provides a solenoid valve drive device.

従来、電磁弁は、吸着電圧を連続的に印加する
ことで、動作させていた。この方式であると保持
時においても、吸着電圧が印加されているので、
電磁弁のコイルの巻線の温度上昇につながり、性
能劣化の原因となる欠点を持つていた。また、む
だな発熱のため、パワーロスとなり不経済となつ
ていた。 Conventionally, electromagnetic valves have been operated by continuously applying an attraction voltage. With this method, the adsorption voltage is applied even during holding, so
This had the disadvantage that it led to an increase in the temperature of the solenoid valve's coil winding, causing performance deterioration. In addition, the wasteful heat generation caused power loss and became uneconomical.

以下、本考案の一実施例を図面をもとに説明す
る。図において電源スイツチ２を投入後、点火ス
イツチ３を投入すると、整流ダイオード４３と分
圧抵抗４４を通じてガス器具用電磁弁３６には、
吸着電圧が印加され、電磁弁３６は吸着状態とな
り、ガスが流れ、点火器４の高圧スパークにより
ガスに点火される。炎検知部３７のギヤツプの間
に、燃焼炎が存在すれば燃焼炎の整流作用により
電源トランス５の２次側巻線のＢ回路が成立し、
抵抗３９、抵抗４０には数μA程度の炎電流が流
れる。この電流のため抵抗３９の両端には電圧が
発生し、第１スイツチング素子としてのＮチヤン
ネルFET２３のゲートに印加される。抵抗３９
に並列なコンデンサ４１はフイルタ用である。抵
抗１１、抵抗１２、抵抗１３、抵抗１４、抵抗１
７、コンデンサ１６、コンパレータ１５から成る
発振回路の出力で、抵抗１８と抵抗１９によつて
第２スイツチング素子としてのトランジスタ２０
をドライブする。FET２３は、抵抗３９の両端
に生じた電圧によつて、FET２３のドレインＤ
とソースＳは導通状態となり、FET２３のドレ
イン電圧V_Dは、トランジスタ２０のオン時には、
抵抗２１と抵抗２２の並列合成抵抗と抵抗２４と
で分圧される電圧に、さらにトランジスタ２０が
オフ時には、抵抗２９と抵抗２１の和と抵抗２２
の並列合成抵抗と抵抗２４とで分圧される電圧と
なる。したがつてFET２３のドレイン電圧は先
者の電圧を最大とし、後者の電圧を最小とする方
形波の発振出力となる。コンパレータ２７には
FET２３のドレイン電圧V_Dと、抵抗２５と抵抗
２６の分圧によつて得られる電圧、（この電圧は、
FET２３のドレイン電圧の最小と最大の間の電
圧に設定してある。）が入力されている。この結
果、コンパレータ２７の出力は最小OVと最大、
第３スイツチング素子としてのトランジスタ３３
のベース・エミツタ電圧V_BEとなる方形波電圧と
なり、トランジスタ３３をスイツチングさせる。
トランジスタ３３がオンの時、パルストランジス
タ３１の一次巻線にエネルギーが蓄えられ、トラ
ンジスタ３３がオフの時先に蓄えられたエネルギ
ーが２次側に供給され、ダイオード３４によつて
整流され、コンデンサ３５によつて平滑され、ガ
イ器具用電磁弁３６の保持電圧を供給するもので
ある。コンデンサ３２はパルストランス３１のデ
マグネタイゼーシヨン用のものである。 An embodiment of the present invention will be described below with reference to the drawings. In the figure, when the power switch 2 is turned on and then the ignition switch 3 is turned on, the gas appliance solenoid valve 36 is connected through the rectifier diode 43 and the voltage dividing resistor 44.
An attraction voltage is applied, the solenoid valve 36 enters the attraction state, gas flows, and the gas is ignited by the high-pressure spark of the igniter 4. If a combustion flame exists between the gaps of the flame detection section 37, a B circuit of the secondary winding of the power transformer 5 is established due to the rectification of the combustion flame.
A flame current of about several μA flows through the resistors 39 and 40. This current generates a voltage across the resistor 39, which is applied to the gate of the N-channel FET 23 as the first switching element. resistance 39
A capacitor 41 in parallel with is for a filter. Resistor 11, Resistor 12, Resistor 13, Resistor 14, Resistor 1
7, the output of an oscillation circuit consisting of a capacitor 16 and a comparator 15, and a transistor 20 as a second switching element by means of a resistor 18 and a resistor 19.
drive. The voltage generated across the resistor 39 causes the drain D of FET23 to
and the source S becomes conductive, and the drain voltage V _D of the FET 23 becomes when the transistor 20 is turned on.
In addition to the voltage divided by the parallel combined resistance of the resistor 21 and the resistor 22 and the resistor 24, when the transistor 20 is off, the sum of the resistors 29 and 21 and the resistor 22
The voltage is divided by the parallel combined resistance and the resistor 24. Therefore, the drain voltage of the FET 23 becomes a square wave oscillation output with the former voltage being the maximum and the latter voltage being the minimum. Comparator 27 has
The voltage obtained by dividing the voltage between the drain voltage V _D of the FET 23 and the resistors 25 and 26, (this voltage is
It is set to a voltage between the minimum and maximum drain voltage of FET23. ) is entered. As a result, the output of the comparator 27 is the minimum OV and the maximum OV,
Transistor 33 as a third switching element
The base emitter voltage V _BE becomes a square wave voltage, which causes the transistor 33 to switch.
When the transistor 33 is on, energy is stored in the primary winding of the pulse transistor 31, and when the transistor 33 is off, the previously stored energy is supplied to the secondary side, rectified by the diode 34, and transferred to the capacitor 35. The voltage is smoothed by the voltage and supplies the holding voltage of the solenoid valve 36 for the guide device. The capacitor 32 is for demagnetization of the pulse transformer 31.

炎検知部３７のギヤツプの間に、燃焼炎が存在
しなければ、電源トランス５の２次側巻線のＢ回
路は成立せず、抵抗３９には炎電流は全く流れ
ず、FET２３のゲートには電圧は印加されない。
このため、FET２３のドレインＤとソースＳは、
オープン状態となり、ドレイン電圧V_Dは、ツエ
ナーダイオード９によつて決定される電圧とな
る。この結果、コンパレータ２７の出力はOVと
なり、トランジスタ３３は完全にオフされ、パル
ストランス３１の一次側巻線には全く電流は流れ
ず、２次側にエネルギーの供給も全くない。した
がつてガス器具用電磁弁３６を開のまま保持する
ことができずガス器具用電磁弁３６は閉となる。 If there is no combustion flame between the gaps of the flame detection section 37, the B circuit of the secondary winding of the power transformer 5 will not be established, no flame current will flow through the resistor 39, and no flame current will flow through the gate of the FET 23. No voltage is applied.
Therefore, the drain D and source S of FET23 are
It is in an open state, and the drain voltage V _D becomes a voltage determined by the Zener diode 9. As a result, the output of the comparator 27 becomes OV, the transistor 33 is completely turned off, no current flows through the primary winding of the pulse transformer 31, and no energy is supplied to the secondary side. Therefore, the gas appliance solenoid valve 36 cannot be kept open, and the gas appliance solenoid valve 36 is closed.

以上述べたように、本考案はガス器具用電磁弁
に、吸着電圧と保持電圧を別々に印加することに
より下記の効果を有する。 As described above, the present invention has the following effects by applying the attracting voltage and holding voltage separately to the electromagnetic valve for gas appliances.

１ガス器具用電磁弁の巻線の温度上昇を低減す
ることができる。1. Temperature rise in the windings of solenoid valves for gas appliances can be reduced.

２巻線の巻数を低減することができる。2. The number of turns of the winding can be reduced.

３むだな発熱のためのパワーロスがなく、省エ
ネルギーとなり経済的である。3. There is no power loss due to unnecessary heat generation, which saves energy and is economical.

４２の結果から単体のコストダウンが図れる。4 From the result of 2, it is possible to reduce the cost of the unit.

５器具全体として安全設計が容易である。5. The safety design of the entire device is easy.

６電磁弁等の負荷に電圧を供給する方法として
タツプを設ける必要がなく構成が簡単となり信
頼性が増す。6. As a method of supplying voltage to a load such as a solenoid valve, there is no need to provide a tap, simplifying the configuration and increasing reliability.

７電磁弁等の負荷に供給する起動時の吸着電圧
から負荷を吸着状態に保持する保持電圧に切替
えるのに、炎電流の発生に同期して動作する保
持電圧供給回路で行うから、機械的接点を有す
るスイツチ等で行うものに比べ信頼性が高まる
とともに操作が容易である。7. Mechanical contacts are used to switch from the start-up adsorption voltage supplied to the load such as a solenoid valve to the holding voltage that holds the load in the adsorption state, because this is done using a holding voltage supply circuit that operates in synchronization with the generation of flame current. It is more reliable and easier to operate than using a switch or the like.

なお本考案は、ガス器具用電磁弁だけでなく、
インダクタンス成分を有するリレー等にも応用で
きるものである。 This invention is applicable not only to solenoid valves for gas appliances.
It can also be applied to relays etc. that have an inductance component.

[Brief explanation of the drawing]

図は本考案の一実施例における電磁弁駆動装置
の回路図である。３……点火スイツチ、４……点火器、５……電
源トランス、６……ブリツジ・ダイオード、９…
…ツエナーダイオード、１０……フイルタ用コン
デンサ、１５……コンパレータ、１６……発振周
波数設定用コンデンサ、２０……トランジスタ、
２３……ＮチヤンネルFET、２７……コンパレ
ータ、３１……パルストランス、３３……スイツ
チング用トランジスタ、３４……整流用ダイオー
ド、３６……ガス器具用電磁弁、４３……半波整
流用ダイオード。 The figure is a circuit diagram of a solenoid valve drive device in an embodiment of the present invention. 3...Ignition switch, 4...Igniter, 5...Power transformer, 6...Bridge diode, 9...
... Zener diode, 10 ... Filter capacitor, 15 ... Comparator, 16 ... Oscillation frequency setting capacitor, 20 ... Transistor,
23... N-channel FET, 27... Comparator, 31... Pulse transformer, 33... Switching transistor, 34... Rectifying diode, 36... Solenoid valve for gas appliances, 43... Half-wave rectifying diode.

Claims

[Scope of utility model registration request]

An attraction voltage supply circuit that applies an attraction voltage to a load such as a solenoid valve at the time of startup, and a detection circuit that detects the operation of the load started by this attraction voltage supply circuit.
A holding voltage supply circuit is provided separately from the attraction voltage supply circuit and operates in synchronization with the detection by the detection circuit to switch to a holding voltage that maintains the load in the attraction state, and the holding voltage supply circuit is an oscillation circuit. and,
a first switching element that turns on when the detection circuit detects a signal and turns off when no signal is detected; and a first switching element that operates when the first switching element turns on and is activated by the output of the oscillation circuit.
A comparator that outputs a pulse by comparing the potential that changes high and low with a reference potential in a second switching element that turns ON and OFF, and a third switching element that turns ON and OFF based on the output of this comparator, and a voltage that changes when this element is ON. A driving device for a solenoid valve, etc., comprising a DC-DC converter comprising a pulse transformer that stores a voltage and supplies a holding voltage lower than the attraction voltage to the load when it is OFF.