JPS63104672A - Circuit for ultrasonic type atomizer - Google Patents
Circuit for ultrasonic type atomizerInfo
- Publication number
- JPS63104672A JPS63104672A JP61249915A JP24991586A JPS63104672A JP S63104672 A JPS63104672 A JP S63104672A JP 61249915 A JP61249915 A JP 61249915A JP 24991586 A JP24991586 A JP 24991586A JP S63104672 A JPS63104672 A JP S63104672A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- piezoelectric vibrator
- thermistor
- bias
- current
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
- Special Spraying Apparatus (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、圧電振動子を高周波で駆動させ、その超音波
エネルギーで液体を霧化させる超音波式霧化装置の回路
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a circuit for an ultrasonic atomizer that drives a piezoelectric vibrator at high frequency and uses the ultrasonic energy to atomize liquid.
従来の技術
従来この種の超音波式霧化装置の回路は、第３図に示す
ような構成であった。第３図において、１は交流電源、
２はダイオードブリッジ、３，４゜６．６はコンデンサ
、７はバイアス抵抗、８は抵抗、９はコイル、１０はト
ランジスタ、１１は圧電振動子、１２は電源回路、１３
はバイアス回路、１４は発振回路であり、交流電源１を
電源回路１２で全波整流し、その電圧をバイアス回路１
３で分圧し、このバイアス電圧が発振回路１４のトラン
ジスタ１ｏに与えられる。これにより圧電振動子１１を
トランジスタ１０によシ高周波で駆動し液体を霧化する
ように構成されたものであった。2. Description of the Related Art Conventionally, a circuit of this type of ultrasonic atomizer has a configuration as shown in FIG. In Fig. 3, 1 is an AC power supply;
2 is a diode bridge, 3,4°6.6 is a capacitor, 7 is a bias resistor, 8 is a resistor, 9 is a coil, 10 is a transistor, 11 is a piezoelectric vibrator, 12 is a power supply circuit, 13
14 is a bias circuit, and 14 is an oscillation circuit.
3, and this bias voltage is applied to the transistor 1o of the oscillation circuit 14. As a result, the piezoelectric vibrator 11 was driven by the transistor 10 at high frequency to atomize the liquid.
発明が解決しようとする問題点
このような従来の構成では、電源投入時に圧電振動子８
より放射された超音波が水面に反射し、圧電振動子に帰
りその超音波のエネルギーにより圧電振動子に異常な電
流が流れ、圧電振動子が破壊するという問題があった。Problems to be Solved by the Invention In such a conventional configuration, when the power is turned on, the piezoelectric vibrator 8
There is a problem in that the emitted ultrasonic waves are reflected on the water surface and return to the piezoelectric vibrator, and the energy of the ultrasonic wave causes an abnormal current to flow through the piezoelectric vibrator, destroying the piezoelectric vibrator.
また、霧化すべき液体がなくなった空炊き動作時や、回
路の異常等により圧電振動子８に流れる電流が異常に増
加し、圧電振動子が破壊するという問題もあった。Further, there is also the problem that the current flowing through the piezoelectric vibrator 8 increases abnormally during dry cooking operation when there is no more liquid to be atomized, or due to abnormality in the circuit, causing the piezoelectric vibrator to be destroyed.
本発明は、このような問題点を解決するもので電源投入
時にはバイアス電圧またはバイアス電流を徐々に上げる
ことにより圧電振動子に流れる電流も徐々に上げ、突入
電流を防止し、また、空炊き時もしくは回路の異常によ
る圧電振動子への異常電流を防止し、圧電振動子の破壊
を防止することを目的とするものである。The present invention solves these problems by gradually increasing the bias voltage or bias current when the power is turned on, thereby gradually increasing the current flowing through the piezoelectric vibrator, preventing rush current, and preventing inrush current. Alternatively, the purpose is to prevent abnormal current from flowing to the piezoelectric vibrator due to abnormality in the circuit, and to prevent destruction of the piezoelectric vibrator.
間窟点を解決するための手段
この問題点を解決するために本発明は、バイアス回路中
に備えた負特性サーミスタ（以下ＮＴＣサーミスタと呼
ぶ）により、電源投入時に圧電振動子に流れる突入電流
を防止し、さらにバイアス回路中に備えた正特性サーミ
スタ（以下ＰＴＣサーミスタと呼ぶ）により、空炊き時
もしくは回路の異常時に圧電振動子に流れる異常電流を
防止する構造のもので、前記ＮＴＣサーミスタが、前記
ＰＴＣサーミスタの自己発熱により暖められる機能を備
えたものである。Means for Solving the Hole Point In order to solve this problem, the present invention uses a negative characteristic thermistor (hereinafter referred to as an NTC thermistor) provided in the bias circuit to reduce the inrush current flowing to the piezoelectric vibrator when the power is turned on. Furthermore, a positive characteristic thermistor (hereinafter referred to as a PTC thermistor) provided in the bias circuit prevents abnormal current from flowing to the piezoelectric vibrator during dry cooking or when the circuit is abnormal. It has a function of being warmed by self-heating of the PTC thermistor.
作用
この構成により、電源投入時には、ＮＴＣサーミスタ、
ＰＴＣサーミスタとも温度が低いため、ＮＴＣサーミス
タの抵抗値は高く、ＰＴＣサーミスタの抵抗値は低い。Effect With this configuration, when the power is turned on, the NTC thermistor,
Since the temperature of both PTC thermistors is low, the resistance value of the NTC thermistor is high and the resistance value of the PTC thermistor is low.
そのため、ＮＴＣサーミスタの抵抗によりバイアス電圧
またはバイアス電流は低くおさえられ、圧電振動子に流
れる電流は小さいが、その後ＮＴＣサーミスタとＰＴＣ
サーミスタを流れる電流により、それぞれ自己発熱し徐
々にＮＴＣサーミスタの抵抗値が低下し、バイアス電圧
またはバイアス電流が徐々に増加し、遂にはＰＴＣサー
ミスタの作用によシバイアスミ流がある一定値に落ちつ
き、圧電振動子に正常な電流が流れ、通常に霧化するこ
とになる。また、空炊き時、または回路の異常によりバ
イアス電圧またはバイアス電流が異常に増加し、ＰＴＣ
サーミスタに流れる電流が増加すると、その自己発熱に
よりＰＴＣサーミスタのスイッチング温度に達し抵抗値
が急激に増大し、バイアス電圧、またはバイアス電流を
低下させ、圧電振動子を流れる電流を低下させることに
なり、このようにして、電源投入時及び空炊き時又は回
路の異常時より圧電振動子の破壊を防止できる。Therefore, the bias voltage or bias current is kept low by the resistance of the NTC thermistor, and the current flowing to the piezoelectric vibrator is small, but then the NTC thermistor and PTC
The current flowing through the thermistor causes self-heating and the resistance value of the NTC thermistor gradually decreases, the bias voltage or bias current gradually increases, and finally the bias current settles to a certain value due to the action of the PTC thermistor, and the piezoelectric A normal current flows through the vibrator, resulting in normal atomization. Also, when the bias voltage or bias current increases abnormally during dry cooking or due to a circuit abnormality, the PTC
When the current flowing through the thermistor increases, the self-heating reaches the switching temperature of the PTC thermistor, causing the resistance value to rapidly increase, lowering the bias voltage or bias current, and reducing the current flowing through the piezoelectric vibrator. In this way, it is possible to prevent the piezoelectric vibrator from being destroyed when the power is turned on, during dry cooking, or when there is an abnormality in the circuit.
実施例
以下本発明の一実施例を図面に基づいて説明する。なお
、従来例と同一箇所には同一符号を付して説明する。EXAMPLE An example of the present invention will be described below based on the drawings. Note that the same parts as in the conventional example will be described with the same reference numerals.
第１図は本発明の一実施例による超音波式霧化装置の回
路を示す図であり、第１図において、１６は電源投入時
に圧電振動子１１に流れる突入電流を防止するＮＴＣサ
ーミスタ、１６は霧化すべき液体がなくなった空炊き時
、または回路の異常時に、圧電振動子１１を流れる電流
の異常増加を防止するＰＴＣサーミスタであり、ＮＴＣ
サーミスタ１５は、電源投入時より徐々に抵抗値が低下
するように、自己発熱及びＰＴＣサーミスタ１６の発熱
により暖められるよう、ＮＴＯサーミスタ１６とＰＴＣ
ｊサーミスタ１６は接着剤で貼合されておシ、熱的に結
合している構造となっている。FIG. 1 is a diagram showing a circuit of an ultrasonic atomization device according to an embodiment of the present invention. In FIG. is a PTC thermistor that prevents an abnormal increase in the current flowing through the piezoelectric vibrator 11 during dry cooking when there is no more liquid to atomize, or when there is an abnormality in the circuit.
The thermistor 15 is connected to the NTO thermistor 16 and the PTC thermistor 15 so that it is warmed by self-heating and heat generated by the PTC thermistor 16 so that the resistance value gradually decreases from when the power is turned on.
The thermistor 16 is bonded with an adhesive and has a thermally bonded structure.
なお、本発明の実施例では、ＮＴＣサーミスタ１６とＰ
ＴＣｔサーミスタ１６の接着により、熱結合としている
が、ＮＴＣサーミスタ１６がＰＴＣサーミスタ１６の発
熱を利用できる方法であればどのような構造でも良い。In addition, in the embodiment of the present invention, the NTC thermistor 16 and P
Although thermal coupling is achieved by adhering the TCt thermistor 16, any structure may be used as long as the NTC thermistor 16 can utilize the heat generated by the PTC thermistor 16.
また、ＮＴＣｉサーミスタ１６とＰＴＣサーミスタ１６
はバイアス回路１３と発振回路１４の間に接続したが、
ＮＴＧサーミスタ１６が電源投入時に圧電振動子１１の
突入電流を防止できる所であシ、ＰＴＣサーミスタ１６
が異常時に圧電振動子１１の電流増加を防止できる所で
あればどこに接続されても良い。また、発振回路１４を
自励形のエミッタ接地としたが、励振形は自励、他励ど
ちらでも良く、また接地形はコレクタ接地・エミッタ接
地どちらでも良い。In addition, NTCi thermistor 16 and PTC thermistor 16
is connected between the bias circuit 13 and the oscillation circuit 14, but
Where the NTG thermistor 16 can prevent the inrush current of the piezoelectric vibrator 11 when the power is turned on, the PTC thermistor 16
It may be connected anywhere as long as it can prevent an increase in the current of the piezoelectric vibrator 11 in the event of an abnormality. Further, although the oscillation circuit 14 is a self-excited type emitter grounded, the excitation type may be either self-excited or externally excited, and the ground plane may be either collector grounded or emitter grounded.
発明の効果
以上のように本発明によれば、ＮＴＣサーミスタにより
電源投入時の圧電振動子に流れる突入電流を防止でき、
さらにＰＴＣサーミスタによシ、空炊き時、または回路
の異常時の圧電振動子の電流増加を防止でき、圧電振動
子の破壊を防止できるという効果が得られる。Effects of the Invention As described above, according to the present invention, the NTC thermistor can prevent rush current flowing through the piezoelectric vibrator when the power is turned on.
Furthermore, the PTC thermistor can prevent an increase in the current in the piezoelectric vibrator when the piezoelectric vibrator is damaged, during dry cooking, or when there is an abnormality in the circuit, and the piezoelectric vibrator can be prevented from being destroyed.
第１図は本発明の一実施例による超音波式霧化装置の回
路構成を示す回路図、第２図は本発明によるＮＴＣサー
ミスタとＰＴＣサーミスタの取付は状態を示す斜視図、
第３図は従来の超音波式霧化装置の回路構成を示す回路
図である。
１１・・・・・・圧電振動子、１２・・・・・・電源回
路、１３・・・・・・バイアス回路、１４・・・・・・
発振回路、１６・・・・・・ＮＴＣサーミスタ、１６・
・・・・・ＰＴＣサーミスタ。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名／ｌ
−−一三１吋胃的子
１２−−一電源１！ｌ路
１３−−−バイアス回路
１４−−一戻４役＠気ト
第２ｍFIG. 1 is a circuit diagram showing the circuit configuration of an ultrasonic atomizer according to an embodiment of the present invention, and FIG. 2 is a perspective view showing how the NTC thermistor and PTC thermistor are installed according to the present invention.
FIG. 3 is a circuit diagram showing the circuit configuration of a conventional ultrasonic atomizer. 11... Piezoelectric vibrator, 12... Power supply circuit, 13... Bias circuit, 14...
Oscillation circuit, 16...NTC thermistor, 16.
...PTC thermistor. Name of agent: Patent attorney Toshio Nakao and 1 other person/l
--131 stomach child 12--1 power supply 1! l path 13 --- bias circuit 14 --- return 4 role @ Kito 2nd m
Claims (1)
の電源回路と、液体を霧化させるための圧電振動子を高
周波で駆動する発振回路と、この発振回路へバイアス電
圧又はバイアス電流を供給するためのバイアス回路と、
電源投入時に圧電振動子に流れる突入電流を防止する負
特性サーミスタと、前記圧電振動子に流れる異常電流を
防止する正特性サーミスタとを備え、前記負特性サーミ
スタが前記正特性サーミスタの発熱により暖められる機
能を備えた超音波式霧化装置の回路。A power supply circuit that rectifies AC voltage and supplies this rectified voltage, an oscillation circuit that drives a piezoelectric vibrator at high frequency to atomize liquid, and a bias voltage or bias current that is supplied to this oscillation circuit. A bias circuit for
The device includes a negative characteristic thermistor that prevents an inrush current from flowing to the piezoelectric vibrator when the power is turned on, and a positive characteristic thermistor that prevents an abnormal current from flowing to the piezoelectric vibrator, and the negative characteristic thermistor is warmed by the heat generated by the positive characteristic thermistor. Circuit of ultrasonic atomizer with functions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61249915A JPS63104672A (en) | 1986-10-21 | 1986-10-21 | Circuit for ultrasonic type atomizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61249915A JPS63104672A (en) | 1986-10-21 | 1986-10-21 | Circuit for ultrasonic type atomizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63104672A true JPS63104672A (en) | 1988-05-10 |
Family
ID=17200083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61249915A Pending JPS63104672A (en) | 1986-10-21 | 1986-10-21 | Circuit for ultrasonic type atomizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63104672A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0377519U (en) * | 1989-11-30 | 1991-08-05 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59175596A (en) * | 1983-03-24 | 1984-10-04 | 三菱電機株式会社 | Device for firing discharge lamp |
| JPS61187966A (en) * | 1985-02-16 | 1986-08-21 | Matsushita Electric Ind Co Ltd | Ultrasonic atomizer |
-
1986
- 1986-10-21 JP JP61249915A patent/JPS63104672A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59175596A (en) * | 1983-03-24 | 1984-10-04 | 三菱電機株式会社 | Device for firing discharge lamp |
| JPS61187966A (en) * | 1985-02-16 | 1986-08-21 | Matsushita Electric Ind Co Ltd | Ultrasonic atomizer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0377519U (en) * | 1989-11-30 | 1991-08-05 |
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