JPS58122071A - Ultrasonic atomizer - Google Patents

Ultrasonic atomizer

Info

Publication number
JPS58122071A
JPS58122071A JP513282A JP513282A JPS58122071A JP S58122071 A JPS58122071 A JP S58122071A JP 513282 A JP513282 A JP 513282A JP 513282 A JP513282 A JP 513282A JP S58122071 A JPS58122071 A JP S58122071A
Authority
JP
Japan
Prior art keywords
converter
voltage
output voltage
turned
circuit
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
Application number
JP513282A
Other languages
Japanese (ja)
Other versions
JPS6311936B2 (en
Inventor
Masatoshi Maeda
正利 前田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP513282A priority Critical patent/JPS58122071A/en
Publication of JPS58122071A publication Critical patent/JPS58122071A/en
Publication of JPS6311936B2 publication Critical patent/JPS6311936B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06Apparatus 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
    • B05B17/0607Apparatus 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

  • Air Humidification (AREA)
  • Special Spraying Apparatus (AREA)

Abstract

PURPOSE:To increase an atomizable quantity, and to start an atomization securely, by providing a switching circuit for applying an output voltage of a DC- DC converter to a driving and oscillating circuit, when said voltage has exceeded voltage set in advance. CONSTITUTION:After an electric power is supplied, when the output voltage of a DC-DC converter 7 has exceeded an inoperable level, S of a switching circuit 9 is turned on, a transistor Q2 is turned on, and as for the output voltage of the DC-DC converter 7, voltage having a sharp rise and high voltage value immediately after the application is applied to a driving and oscillating circuit 6. As a result, an ultrasonic horn 1 is driven by large vibration amplitude 7 immediately after the start to eliminate an inconvenience that the atomization does not start due to a water film 4a formed on an atomizing surface 1a.

Description

【発明の詳細な説明】 本発明は超音波噴霧器に関するものであり、その目的と
するところは、噴霧を確実に開始させることができ、し
7炒・も平均消費電力の少ない超音波噴霧器を提供する
ことにある。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrasonic atomizer, and its purpose is to provide an ultrasonic atomizer that can reliably start atomization and has low average power consumption. It's about doing.

従来、この種の超音波噴霧器は第1図に示すように電歪
素子(2)にて駆動される超音波ホーシ用の略垂直面よ
りなる噴霧面けa)の下端に貯水タンク(3)内の液体
(4)を毛細管現象によシ吸上げる吸水体(5)の上端
を当接させ、超音波ホーンi+)を振動させる電歪素子
(21を駆動発振回路(6)出力にて駆動するようにな
っており、吸水体(5)を用いることKより常に貯水タ
ンク(3)内の液体(4)を一定量だけ超音波ホーン(
1)の噴霧面(1a)に供給するようにして噴霧を安定
化するとともに噴霧に要する電力を必要最小限にしてい
た。この場合、液体(4)の噴霧は噴霧面(1a、)へ
の液体供給量が超音波ホーン(ilの振動による噴霧可
能量(超音波ホーン(1)の振動振巾に比例する量)よ
シも小さければ安定している。ところで、このような超
音波噴霧器において、例えは電池のような電源(8)の
電源電圧を昇圧するDC。
Conventionally, as shown in Fig. 1, this type of ultrasonic atomizer has a water storage tank (3) at the lower end of a spray surface (a) consisting of a substantially vertical surface for an ultrasonic hose driven by an electrostrictive element (2). The electrostrictive element (21) that vibrates the ultrasonic horn (i+) is driven by the output of the drive oscillation circuit (6). Rather than using the water absorber (5), a certain amount of the liquid (4) in the water storage tank (3) is always pumped with the ultrasonic horn (
By supplying it to the spray surface (1a) of 1), the spray was stabilized and the power required for spraying was minimized. In this case, the amount of liquid (4) supplied to the spray surface (1a,) is equal to the amount that can be sprayed by the vibration of the ultrasonic horn (il) (an amount proportional to the vibration amplitude of the ultrasonic horn (1)). By the way, in such an ultrasonic atomizer, a DC voltage is used to boost the power supply voltage of a power source (8) such as a battery.

DCコンバータ(7)出力を駆動発振回路(6)に印加
するようにした場合、電源投入時に駆動発振回路(6)
に印加されるDC−DCコンバーク(9)の出力電圧(
Vz)が第2図に示すように緩やかに立上るため、電源
投入から一定期間超音波ホーシf1)の噴霧面(la)
に供給源れる液体供給量が始動時における噴霧可能量よ
りも大きくなって噴霧が開始しなくなるという問題があ
った。すなわち、DC!−DCCコンバータ7)出力の
立上りが遅いと、当然のことながら駆動発振回路(6)
出力の立上りも遅くなり、超音波ホーン(1)の振動振
巾が電源投入後から一定時間遅れて定常状態となる。こ
の場合、噴霧可能量が液体供給量よりも小さい間噴霧が
行なわれないにも拘らず噴霧面(1a)に液体(4)が
供給されることになるので、第3 M (a)(b+)
に示すように噴霧面(1a)に水膜(4a)が出来てし
1い超音波ホー、、’ (11の共振周波数がす才また
り、駆動電源すなわち駆動発振回路(6)から見たイシ
ヒータンスが増大して駆動電流が少くなったりし、DC
−DCコンノ’、−/y(7)出力が定常状態になった
場合においても超音波ホーンmの振動振巾が所定の値よ
りも小さくなシ、第3図(elに示すように噴霧面(1
a)にできている水膜(4a)が厚くなって水滴化する
だけで噴霧が開始しないという問題があった。このよう
な問題点を解決するには噴霧面(1a)に水膜(4a)
が形成された状態においても噴霧が確実にできるように
DC−DCコンバータ(7)出力電圧(vDc)を大き
く設定すれは良いことになるが、第3図(C)(d)に
示すように水膜(4a)が霧化された後の定常噴霧状態
において、DC−DOコシパ〜ヲ(7)出力が必要以上
に大きくなって平均消費電力が大きくなり電池の消耗が
早くなるという不都合があった。本発明は上記の点(で
鑑みて為きれたものである。
If the DC converter (7) output is applied to the drive oscillation circuit (6), the drive oscillation circuit (6)
The output voltage of the DC-DC converter (9) applied to (
Vz) rises slowly as shown in Figure 2, so the spray surface (la) of the ultrasonic hose f1) rises slowly for a certain period of time after the power is turned on.
There has been a problem in that the amount of liquid supplied from the source becomes larger than the amount that can be sprayed at the time of startup, and spraying does not start. In other words, DC! -DCC converter 7) If the rise of the output is slow, it is natural that the drive oscillation circuit (6)
The rise of the output is also delayed, and the vibration amplitude of the ultrasonic horn (1) reaches a steady state with a certain time delay after the power is turned on. In this case, the liquid (4) is supplied to the spray surface (1a) even though no spraying is performed while the sprayable amount is smaller than the liquid supply amount, so the third M(a)(b+ )
As shown in Fig. 1, the ultrasonic wave has a water film (4a) on the spray surface (1a). Ishiheatance increases, drive current decreases, and DC
-DC controller', -/y (7) If the vibration amplitude of the ultrasonic horn m is smaller than a predetermined value even when the output is in a steady state, (1
There was a problem in that the water film (4a) formed in a) became thick and turned into water droplets, but spraying did not start. To solve this problem, a water film (4a) is added to the spray surface (1a).
It is a good idea to set the output voltage (vDc) of the DC-DC converter (7) to a large value so that atomization can be performed reliably even in the state where In the steady state of atomization after the water film (4a) is atomized, the output of the DC-DO copier (7) becomes larger than necessary, resulting in a disadvantage that the average power consumption becomes large and the battery wears out quickly. Ta. The present invention has been made in view of the above points.

以下、実施例について図を用いて説明する。第4図は本
発明一実施例の具体回路を示すもので、(6)は電歪素
子(2)を駆動する駆動発振回路であり、発振用トラン
ジスタ(Ql)、発振トラシス(′rR)、チョークコ
イル(Ll)、コンデンサ(C1) (C!2)、抵抗
(R1) (R2)にて形成さj、ている。(9)は電
源スィッチ(swl)が投入された後、D C−D C
! :] コンバータ7)の出力電圧(VDC)が予め
設定烙れた電圧以上になったときKDC−DCCコンバ
ータ7)出力(Voc)を駆動発振回路(6)に印加す
るスイッチ回路であり、スイッチシジ用トランジスタ(
C2)、ツェナタイオード(πl)、逆阻止3端子サイ
リスタ(S)(以下BCR(S)と略称する)および抵
抗(R3) (R4)にて形成きれている。第5図は始
動回路(lO)を付加したDC−D Cコンバータ(7
)の具体回路例を示すものであり、DC−DCコンバー
タ(7)はトランジスタ(C3)〜(C6)、タイオー
ド(Dl)、ツェナタイオード(コ2)、コンデンサ(
C3) (04)および抵抗(R5)〜(R11)にて
形成されており、始動回路(10)はトランジスタ(C
7)、タイオード(D2)、コンデシ+j((:5)お
よび抵抗(R12)(R,、lにて形成されている。
Examples will be described below using figures. FIG. 4 shows a specific circuit of an embodiment of the present invention, in which (6) is a drive oscillation circuit that drives the electrostrictive element (2), including an oscillation transistor (Ql), an oscillation trasis ('rR), It is formed by a choke coil (Ll), capacitors (C1) (C!2), and resistors (R1) (R2). (9) is D C-D C after the power switch (swl) is turned on.
! :] This is a switch circuit that applies the output (Voc) of the KDC-DCC converter 7) to the drive oscillation circuit (6) when the output voltage (VDC) of the converter 7) exceeds a preset voltage. Transistor for (
C2), a Zener diode (πl), a reverse blocking three-terminal thyristor (S) (hereinafter abbreviated as BCR(S)), and resistors (R3) (R4). Figure 5 shows a DC-DC converter (7
), the DC-DC converter (7) includes transistors (C3) to (C6), a diode (Dl), a Zener diode (C2), and a capacitor (
C3) (04) and resistors (R5) to (R11), and the starting circuit (10) is formed by a transistor (C3) (04) and resistors (R5) to (R11).
7), a diode (D2), a conductor (:5), and a resistor (R12) (R,,l).

いま、D C−D’ Cコンバータ(7)は抵抗(R1
0)の両端電圧(VRIO)とトラ、:/、;スタ(C
4)のペースエミッタ間電圧(VBE)との和(Vgl
D+ VBK )がツェナタイオード(D2)のツェナ
電圧(VZD2 )を超えるとトランジスタ(C4)が
オンして発振状態を変化(オシ時間を短かくオフ時間を
長くするように変化)させ出力電圧(vDc)を一定に
して定電流特性が得られるようになっている。ここに、
実施例(あっては、トランジスタ(Q、)のベースエ三
ツタ間に始動回路(lO)のトランジスタ(C7)が接
続されているので、電源スィッチ(SW、)がオン場れ
ると、電池(8)からのコンデンサ(Or)の充電々流
によってトランジスタ(C7)がオンしてトランジスタ
(C4)のベースエ三ツタ間が短絡されるため、ツェナ
タイオード(Zn2)に電流が流れた場合(VRIO+
 VBE > VZD2 )にあってもトランジスタ(
C4)がオフのままとなり、フィードバックがかからず
、定電流特性が得られない、すなわちDC−DCコンバ
ータ(7)の出力電圧(VIIX: )は第6図に示す
ように電源スィッチ(肋)のオシと同時に徐々に増加し
、一旦、通常の出力電圧(VDCO)よりも太きくなる
。この後コンデンサ(C5)の充電が進むにつれてトラ
ンジスタ(C7)がオフ状態に移行し、コンデシ+j(
05)の充電完了時点でトランジスタ(C5)が完全に
オフしてDC−DCコンバータ(7)が本来の動作に戻
り出力電圧(VDC)は通常の出力電圧(Voco)と
なる。したがって、電源投入後の一定時間(T)だけD
C−DCCコンバータ7)の出力電圧(VDC)が通常
の出力電圧(VDOO)よりも増大するようになってい
るCコンバータ(7)の定常の出力電圧(VDGO)以
上に設定きれており、電源投入後、DC−DCCコンバ
ータ7)の出力電圧(vpc)が上記動作しきい値レベ
ル(VON)以上になったときスイッチ回路(9)の5
aR(S)がオンしてトラシジスタ(Q2)がオシし、
DC−DCコンバータ(7)の出力電圧(VDc)が駆
動発振回路(6)に印加されるようになっている。第7
図はコシデンサ(C1)の両端電圧(VCI)を示すも
のである。
Now, the D C-D'C converter (7) is connected to the resistor (R1
0) both ends voltage (VRIO) and tra, :/, ;star (C
4) with the pace emitter voltage (VBE) (Vgl
When D+ VBK ) exceeds the zener voltage (VZD2 ) of the zener diode (D2), the transistor (C4) turns on and changes the oscillation state (changes to shorten the oscillation time and lengthen the OFF time), and the output voltage ( Constant current characteristics can be obtained by keeping vDc) constant. Here,
In this embodiment, the transistor (C7) of the starting circuit (1O) is connected between the base terminals of the transistor (Q,), so when the power switch (SW, ) is turned on, the battery (8 ) The transistor (C7) is turned on by the charging current of the capacitor (Or) from
Even if VBE > VZD2 ), the transistor (
C4) remains off, no feedback is applied, and constant current characteristics cannot be obtained. In other words, the output voltage (VIIX: ) of the DC-DC converter (7) remains off when the power switch (cost) is turned off as shown in Figure 6. It gradually increases at the same time as the output voltage of VDCO increases, and once becomes thicker than the normal output voltage (VDCO). After this, as the capacitor (C5) is charged, the transistor (C7) shifts to the off state, and the capacitor (C5) becomes OFF.
05), the transistor (C5) is completely turned off, the DC-DC converter (7) returns to its original operation, and the output voltage (VDC) becomes the normal output voltage (Voco). Therefore, for a certain period of time (T) after the power is turned on, D
The output voltage (VDC) of the C-DCC converter 7) is set to be higher than the steady output voltage (VDGO) of the C converter (7), which is designed to increase more than the normal output voltage (VDOO), and the power supply 5 of the switch circuit (9) when the output voltage (vpc) of the DC-DCC converter 7) becomes equal to or higher than the above-mentioned operating threshold level (VON).
aR(S) turns on and the transisister (Q2) turns on,
The output voltage (VDc) of the DC-DC converter (7) is applied to the drive oscillation circuit (6). 7th
The figure shows the voltage (VCI) across the cocidenser (C1).

したがって、駆動発振回路(6)には立上シが急峻で、
かつ印加直後の電圧値が大きい電圧が印加されることに
なり、超音波ホーン(11は始動直後から大きな振動振
巾で駆動され、超音波ホーン(1)の振動振巾が小さい
ために液体供給量が噴霧可能量よシも大きくなる期間が
殆んどなくなシ、従来例のように超音波ホーン(1)の
噴霧面(1a)に水膜(4a)が出来て噴霧が開始しな
くなるという不都合がなくな1  ることになる。なお
、実施例にあっては始動回路(10)を設けることによ
り電源投入後の一定時間(T)だけDC−DcCコンバ
ータ7)の出力電圧(VDO)を高くして超音波ホーン
(1)の駆動エネル千−を増大させて噴霧をよシ確実に
開始させるようにしているが、第2図に示すような出力
特性を有する通常のDC−DCCコンバータ7)を用い
ても良いことは言うまでもなく、その響合、スイッチ回
路(9)の動作レベル(VON)は定常の出力電圧(V
DOO)よりも若干低く設定される。
Therefore, the drive oscillation circuit (6) has a steep rise,
In addition, a voltage with a large voltage value immediately after application is applied, and the ultrasonic horn (11) is driven with a large vibration amplitude immediately after starting, and since the vibration amplitude of the ultrasonic horn (1) is small, the liquid supply There is almost no period during which the amount becomes larger than the amount that can be sprayed, and unlike the conventional example, a water film (4a) forms on the spray surface (1a) of the ultrasonic horn (1) and spraying does not start. In addition, in the embodiment, by providing the starting circuit (10), the output voltage (VDO) of the DC-DcC converter 7) is reduced for a certain period of time (T) after the power is turned on. The drive energy of the ultrasonic horn (1) is increased by increasing the driving energy of the ultrasonic horn (1) to more reliably start spraying. It goes without saying that 7) may be used, and the operation level (VON) of the switch circuit (9) is equal to the steady output voltage (VON).
DOO).

本発明は上述のように電歪素子にて駆動される超音波ホ
ーンの略垂直面よシなる噴霧面の下端に貯水タシク内の
液体を毛細管現象により吸上ける吸水体の上端を当接さ
せ、電歪素子を駆動する駆動発振回路にD(1!−Df
:!コンバータを介して電池電源を供給するようにして
成る超音波噴霧器において、電源投入後DC−DCコシ
バータの出力電圧が予め設定された電圧以上になったと
きにDC−DCCコンバータ出力電圧を駆動発振回路に
印加するスイッチ回路を設けたものであるから、駆動発
振回路に立上シが急峻な電圧が印加され、超音波ホーン
の始動直後の振動振巾を大きくして噴霧可能量を大きく
することができるので、噴霧を確実に開始させることが
できるという利点があシ、しかも、従来例のように噴霧
を確実に開始させるためにDC−DC,]シバータの出
力電圧を大きくする必要がないので、平均消費電力が少
くなって電池等の容量の限られた電源を用いる場合には
特に有用である。
As described above, the present invention brings into contact the upper end of the water absorbing body that sucks up the liquid in the water tank by capillary action, on the lower end of the spray surface, which is a substantially vertical plane of the ultrasonic horn driven by the electrostrictive element. , D(1!-Df
:! In an ultrasonic atomizer configured to supply battery power through a converter, when the output voltage of the DC-DC converter exceeds a preset voltage after the power is turned on, an oscillation circuit drives the DC-DCC converter output voltage. Since this device is equipped with a switch circuit that applies a voltage to the drive oscillation circuit, a voltage with a steep rise is applied to the drive oscillation circuit, which increases the amplitude of vibration immediately after the ultrasonic horn starts, thereby increasing the amount of spray that can be sprayed. This has the advantage of being able to start spraying reliably, and there is no need to increase the output voltage of the DC-DC shiverter to ensure starting spraying, as in the conventional example. This is particularly useful when the average power consumption is reduced and a power source with limited capacity, such as a battery, is used.

【図面の簡単な説明】[Brief explanation of the drawing]

第1圀は従来例の概略構成図、第2図および第3図(a
)〜(e)は同上の動作説明図、第4図は本発。 川−実施例の回路図、第5図は同上の要部具体回路図、
第6図および第7図は同上の動作説明図である。 (1)は超音波ホーン、(1a)は噴霧面、(2)は電
歪素子、(3)は貯水タシク、(4)は液体、(5)は
吸水体、(6)は駆動発振回路、(7)はDC−DCC
コンバータ(8)は電池、(9)はスイッチ回路である
。 代理人 弁理士 石 1)長 七 第1図 4 第2図 1 第4WA 第5図
The first area is a schematic configuration diagram of the conventional example, Figures 2 and 3 (a
) to (e) are explanatory diagrams of the same operation as above, and Fig. 4 is the original one. River - Circuit diagram of the embodiment, Figure 5 is a specific circuit diagram of the main part of the same as above,
FIGS. 6 and 7 are explanatory diagrams of the same operation. (1) is an ultrasonic horn, (1a) is a spray surface, (2) is an electrostrictive element, (3) is a water tank, (4) is a liquid, (5) is a water absorber, and (6) is a drive oscillation circuit. , (7) is DC-DCC
The converter (8) is a battery, and (9) is a switch circuit. Agent Patent Attorney Ishi 1) Chief 7 Figure 1 4 Figure 2 1 4WA Figure 5

Claims (1)

【特許請求の範囲】[Claims] (1)  電歪素子にて駆動される超音波ホーンの略垂
直面よりなる噴霧面の下端に貯水タンク内の液体を毛細
管現象により吸上げる吸水体の上端を当接させ、電歪素
子を駆動する駆動発振回路にDC−DCコンバータを介
して電池電源を供給するようにして成る超音波噴霧器に
おいて、電源投入後1) O−D Cコンバータの出力
電圧が予め設定された電圧以上になったときにDC−D
Cコンバータの出力電圧を駆動発振回路に印加するスイ
ッチ回路を設けたことを特徴とする超音波噴霧器。
(1) The upper end of a water absorbing body that sucks up liquid in a water storage tank by capillary action is brought into contact with the lower end of the spray surface, which is a substantially vertical surface of an ultrasonic horn driven by an electrostrictive element, and the electrostrictive element is driven. In an ultrasonic atomizer configured to supply battery power via a DC-DC converter to a drive oscillation circuit, after the power is turned on: 1) When the output voltage of the O-DC converter exceeds a preset voltage. to DC-D
An ultrasonic atomizer comprising a switch circuit for applying an output voltage of a C converter to a drive oscillation circuit.
JP513282A 1982-01-15 1982-01-15 Ultrasonic atomizer Granted JPS58122071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP513282A JPS58122071A (en) 1982-01-15 1982-01-15 Ultrasonic atomizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP513282A JPS58122071A (en) 1982-01-15 1982-01-15 Ultrasonic atomizer

Publications (2)

Publication Number Publication Date
JPS58122071A true JPS58122071A (en) 1983-07-20
JPS6311936B2 JPS6311936B2 (en) 1988-03-16

Family

ID=11602780

Family Applications (1)

Application Number Title Priority Date Filing Date
JP513282A Granted JPS58122071A (en) 1982-01-15 1982-01-15 Ultrasonic atomizer

Country Status (1)

Country Link
JP (1) JPS58122071A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6295166A (en) * 1985-10-19 1987-05-01 Omron Tateisi Electronics Co Ultrasonic atomizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6295166A (en) * 1985-10-19 1987-05-01 Omron Tateisi Electronics Co Ultrasonic atomizer
JPH0510984B2 (en) * 1985-10-19 1993-02-12 Omron Tateisi Electronics Co

Also Published As

Publication number Publication date
JPS6311936B2 (en) 1988-03-16

Similar Documents

Publication Publication Date Title
JPS59168518A (en) Humidifier
JPH0520456Y2 (en)
JPS58122071A (en) Ultrasonic atomizer
JPH0740318U (en) Headlamp cleaner
TWI343279B (en) Electrostatic atomizer
JPS6230827B2 (en)
JP3140308B2 (en) Boost type chopper regulator
JPS5913902B2 (en) Ultrasonic liquid atomizer
JPS5833822Y2 (en) Piezoelectric vibrator drive circuit for ultrasonic atomizer
JPS58122072A (en) Ultrasonic atomizer
JPS599728Y2 (en) Ultrasonic atomizer
JPS6295166A (en) Ultrasonic atomizer
JPS61187966A (en) Ultrasonic atomizer
JP3831367B2 (en) Piezoelectric vibrator drive circuit
JPH0121020Y2 (en)
JPH0747992Y2 (en) Switching regulator
JPS63182913A (en) Driving circuit for field effect transistor
JPS5913263B2 (en) Ultrasonic liquid atomizer
JPS6125901Y2 (en)
JPH0759345A (en) Transformer-coupled switching power supply
JPH0729751Y2 (en) Inverter device
JPS6335898B2 (en)
KR910005425Y1 (en) Power supply circuit for tv
JPS6023013Y2 (en) Ultrasonic atomizer
JPS604625Y2 (en) Oscillation circuit for ultrasonic atomizer