JPS62118072A - Control circuit for solenoid driven pump - Google Patents
Control circuit for solenoid driven pumpInfo
- Publication number
- JPS62118072A JPS62118072A JP25734185A JP25734185A JPS62118072A JP S62118072 A JPS62118072 A JP S62118072A JP 25734185 A JP25734185 A JP 25734185A JP 25734185 A JP25734185 A JP 25734185A JP S62118072 A JPS62118072 A JP S62118072A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- pulse
- control circuit
- frequency
- external contact
- 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
Landscapes
- Electromagnetic Pumps, Or The Like (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はポンプの吐出量調整を非常に簡易な手段にて行
うことのできるソレノイド駆動ポンプの制御回路に関す
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control circuit for a solenoid-driven pump that can adjust the discharge amount of the pump by a very simple means.
（従来の技術）
従来、この種ソレノイド駆動ポンプの制御回路としては
、例えば特開昭５４−１４９９０７号公報所載のものが
存在する。すなわち、この従来のものを簡略すれば、第
５図に示す如く基準パルスを発信する発信回路１ａに該
発信パルスを分周する分周回路１６を接続すると共に、
該分周回路１６に一定幅のパルスを発生するパルス発生
回路１７を接続して設けて、該パルス発生回路１７から
ソレノイド駆動回路ｌＯにパルス信号を出力させるもの
であり、ポンプのストローク数制御即ち前記パルス発生
回路１７のパルス信号の周波数のコントロールは分周回
路１６に別途接続して設けた周波数切換回路１日を手動
で操作して行うのである。(Prior Art) Conventionally, as a control circuit for this type of solenoid-driven pump, there is one disclosed in, for example, Japanese Patent Laid-Open No. 54-149907. That is, to simplify this conventional method, as shown in FIG. 5, a frequency dividing circuit 16 that divides the frequency of the transmitted pulse is connected to a transmitting circuit 1a that transmits a reference pulse, and
A pulse generation circuit 17 that generates pulses of a constant width is connected to the frequency dividing circuit 16, and a pulse signal is output from the pulse generation circuit 17 to the solenoid drive circuit IO, which controls the stroke number of the pump. The frequency of the pulse signal from the pulse generating circuit 17 is controlled by manually operating a frequency switching circuit provided separately connected to the frequency dividing circuit 16.
（発明が解決しようとする問題点）
しかしながら、前記従来のものはポンプ吐出量の制御（
ストローク数制御）を分周回路１６に接続された周波数
切換回路１８の手動切換えにて行うように構成してなる
ために、該周波数切換え作業が外部より遠隔操作にて簡
易に行えないという難点を有するに限らず、前記周波数
切換回路１８を自動で切換えてポンプの吐出流量を例え
ば該ポンプ吐出液の所定の水位や圧力等に追随させるべ
く自動制御させるようなことが全く困難となり、その使
用性に於いて融通がきかず用途範囲が非常に狭いものと
なる大なる問題点を有していたのである。(Problems to be Solved by the Invention) However, the conventional method described above does not control the pump discharge amount (
Since the stroke number control) is configured to be performed by manual switching of the frequency switching circuit 18 connected to the frequency dividing circuit 16, the frequency switching operation cannot be easily performed by remote control from the outside. However, it is difficult to automatically control the pump discharge flow rate by automatically switching the frequency switching circuit 18 to follow a predetermined water level or pressure of the pump discharge liquid, and its usability is reduced. This had a major problem in that it was inflexible and its range of applications was extremely narrow.
本発明は上記の如き従来の問題点に鑑みてなされたもの
で、その目的とするところは、ポンプ吐出量の変更調整
を遠隔操作にて簡易に行わせると共に、該変更調整作業
を自動操作可能なものにする点にある。・
（問題点を解決するための手段）
本発明はソレノイドの駆動回路に出力するパルス信号の
周波数の種類を予め数段階設定させておくと共に、該予
め設定した周波数の選択作業を自動操作可能なスイ・ソ
チ動作にて行わせることにより、上記従来の問題点を解
決せんとして構成されたものである。The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to allow the change and adjustment of the pump discharge amount to be easily performed by remote control, and to enable the change and adjustment work to be performed automatically. The point is to make it something. - (Means for solving the problem) The present invention allows the type of frequency of the pulse signal to be output to the solenoid drive circuit to be set in advance in several stages, and the selection of the preset frequency can be automatically operated. This is designed to solve the above-mentioned problems of the conventional method by performing the Swiss-Sochi operation.
すなわち、本発明の構成の要旨は、ソレノイド駆動回路
１０に供給するパルス信号の周波数制御を行うパルス制
御回路５に、外部接点８の開閉に連動じて開閉または切
換えられる一個または複数個のスイッチ７を有する外部
接点受付回路６を接続して設けて、該外部接点受付回路
６のスイッチ７の開閉又は切換えに応じて前記パルス制
御回路５から出力されるパルスの周波数が予め設定され
た異なる周波数に変更されるべく構成してなるにある。That is, the gist of the configuration of the present invention is that the pulse control circuit 5 that controls the frequency of the pulse signal supplied to the solenoid drive circuit 10 includes one or more switches 7 that are opened and closed or switched in conjunction with the opening and closing of the external contacts 8. An external contact reception circuit 6 having an external contact reception circuit 6 is connected and provided, and the frequency of the pulse outputted from the pulse control circuit 5 changes to a preset different frequency in response to opening/closing or switching of a switch 7 of the external contact reception circuit 6. It is configured to be changed.
（作用）
従って、上記構成を特徴とするソレノイド駆動ポンプの
制御回路に於いては、前記パルス制御回路５から出力さ
れるパルスの周波数は外部接点受付回路６のスイッチ７
の開閉又は切換え状態に応じて予め設定された周波数と
なるのであるが、前記スイッチ７の開閉又は切換え動作
は外部接点８の開閉に連動して行われるために、前記周
波数の変更作業は前記外部接点８を外部で操作すること
によって自在に行え、また該外部接点８の操作は自動操
作可能なものとなるのである。(Function) Therefore, in the control circuit of the solenoid-driven pump characterized by the above configuration, the frequency of the pulse output from the pulse control circuit 5 is set to the switch 7 of the external contact receiving circuit 6.
The frequency is set in advance according to the opening/closing or switching state of the switch 7, but since the opening/closing or switching operation of the switch 7 is performed in conjunction with the opening/closing of the external contact 8, the frequency changing operation is performed by the external This can be done freely by operating the contact 8 externally, and the external contact 8 can be operated automatically.
（実施例）
以下、本発明の実施態様について図面に示した一実施例
に従って説明する。(Example) Hereinafter, embodiments of the present invention will be described according to an example shown in the drawings.
第１図に於いて、１は一定周波数の基準パルスを発生す
るパルス発信回路を示し、該発信回路１は商用電源を利
用した源発生器２とパルス整形器３及び分周回路４とか
らなる。５は前記パルス発信回路ｌから発生した基準パ
ルスから逓倍の周波数を有するパルスを作るパルス制御
回路（ＣＰＵ：中央処理装置）を示す。６は該パルス制
御回路５の入力部側に設けられた外部接点受付回路を示
し、該回路６はパルス制御回路５の入力部に接続された
ａ、ｂ、Ｃ端子を備えた双方向接点型のリレースイッチ
７を具備してなり、また該リレースイッチ７はソレノイ
ド駆動ポンプの外部に設けられた外部接点８と接続され
て該外部接点８の開閉動作によって切換えられるもので
ある。また、前記パルス制御回路５は前記外部接点受付
回路６のスイッチ７のＣ端子がａ、ｂ端子のいずれに接
続するかによって例えば１００ｔｌｚ及び１０１１ｚの
二種類の周波数のパルスを夫々切換えて出力すべく構成
されている。１０は前記パルス制御回路５から出力され
るパルスを受信してソレノイド１１を駆動するソレノイ
ド駆動回路を示し、１２は該ソレノイド駆動回路１０と
パルス制御回路５との双方に接続して設けた電流検出回
路を示す。In FIG. 1, reference numeral 1 indicates a pulse oscillation circuit that generates a reference pulse of a constant frequency, and the oscillation circuit 1 is composed of a source generator 2 using a commercial power source, a pulse shaper 3, and a frequency dividing circuit 4. . Reference numeral 5 denotes a pulse control circuit (CPU: central processing unit) which generates a pulse having a frequency multiplied from the reference pulse generated from the pulse generating circuit 1. Reference numeral 6 indicates an external contact receiving circuit provided on the input side of the pulse control circuit 5, and the circuit 6 is a bidirectional contact type having a, b, and C terminals connected to the input section of the pulse control circuit 5. The relay switch 7 is connected to an external contact 8 provided outside the solenoid-driven pump, and is switched by the opening/closing operation of the external contact 8. Further, the pulse control circuit 5 is configured to switch and output pulses of two types of frequencies, for example, 100tlz and 1011z, depending on whether the C terminal of the switch 7 of the external contact reception circuit 6 is connected to the a or b terminal. It is configured. Reference numeral 10 indicates a solenoid drive circuit that receives pulses output from the pulse control circuit 5 and drives the solenoid 11, and reference numeral 12 indicates a current detection circuit connected to both the solenoid drive circuit 10 and the pulse control circuit 5. Shows the circuit.
本実施例は以上の構成よりなり、次にその使用法並びに
作用について、例えば本実施例に係るソレノイド駆動ポ
ンプ１３を第２図に示す如く排水管１４を有する水槽１
５内への送水作業に使用して、該水槽１５の所定位置に
外部接点８としてのレベルスイッチ８を設けた場合を一
例として説明する。The present embodiment has the above-mentioned configuration.Next, we will explain how to use and operate the solenoid-driven pump 13 according to the present embodiment, as shown in FIG.
An example will be described in which a level switch 8 as an external contact 8 is provided at a predetermined position of the water tank 15 for use in water supply work into the water tank 15.
先ず、第１図に示す如くレベルスイッチ８ （外部接点
）がオフで外部接点受付回路６のリレースイッチ７のＣ
端子がｂ端子と接続されてなる際はパルス制御回路５か
ら例えば１０Ｈｚのパルスが出力された状態にあり、ポ
ンプ１３は比較的小吐出流量で運転されることとなる。First, as shown in FIG. 1, when the level switch 8 (external contact) is off, the relay switch 7 of the external contact receiving circuit 6
When the terminal is connected to the b terminal, a pulse of, for example, 10 Hz is output from the pulse control circuit 5, and the pump 13 is operated at a relatively small discharge flow rate.
然して、前記水槽１５内の液面レベルがレベルスイッチ
８よりも低下して該スイッチ８がオンとなった場合には
、外部接点受付回路６のリレースイッチ７がそれと連動
動作して双方向接点スイソチ７のＣ端子がａ端子と接続
すべく切換えられることとなり、これによってパルス制
御回路５の出力するパルス周波数が予め設定された周波
数例えば１００ ｔｌｚに自動的に変更されることとな
って、ポンプ１３の吐出量が増加され、その結果前記水
槽１５内の液面レベルを一定レベル以上に維持させる作
業が自動制御でき、何ら手作業にてパルスの周波数変更
作業を行う必要がないのである。However, when the liquid level in the water tank 15 is lower than the level switch 8 and the switch 8 is turned on, the relay switch 7 of the external contact receiving circuit 6 operates in conjunction with the liquid level and the bidirectional contact switch is turned on. The C terminal of the pump 13 is switched to be connected to the a terminal, and as a result, the pulse frequency output by the pulse control circuit 5 is automatically changed to a preset frequency, for example, 100 tlz. As a result, the work of maintaining the liquid level in the water tank 15 above a certain level can be automatically controlled, and there is no need to manually change the pulse frequency.
以上の実施例では、水槽への給水制御について述べたが
、ソレノイド駆動ポンプ１３を薬注ポンプとして用いる
場合にも応用できるのである。すなわち、例えばソレノ
イド駆動ポンプ１３をボイラー用水への薬注ポンプとし
て用いた場合に、ボイラーの定常運転時にはこの際の補
給水量に見合う薬注量が供給され、この定常運転時には
外部接点８はオフ状態にある。然して、ボイラー水は塩
類濃度が所定以上にならないように定期的にブローを行
い、このブローによりボイラー水中の薬品も排出される
と共に、このブロー量に見合う分だけ定常運転時の補給
水量以上の補給水が供給されるので、ボイラー水中の薬
品濃度が所定値よりも低くなる事態が生じる。よって、
前記ブロ一時には定常時以上の量の薬注を行う必要があ
り、そのため前記ブロ一時に外部接点８をオンにして薬
注量を増加させて前記薬品濃度の低下を阻止するのであ
る。これを具体的に説明すれば、定常運転時にはパルス
制御回路５から例えば１０Ｈｚのパルスが出力され、ブ
ロ一時には例えば１００ Ｈｚのパルスが出力されるよ
うに設定し、またこの際の外部接点８はブロー弁、ボイ
ラーの缶水水位、或いは補給水ポンプ等と連動させてお
けばよく、更には前記外部接点８を後述するように流量
検知器から取って前記ブローの流量を検出すべく構成し
てもよいのである。In the above embodiment, water supply control to a water tank has been described, but the present invention can also be applied to the case where the solenoid-driven pump 13 is used as a chemical injection pump. That is, for example, when the solenoid-driven pump 13 is used as a chemical injection pump for boiler water, during steady operation of the boiler, the amount of chemical injection corresponding to the amount of make-up water at this time is supplied, and during this steady operation, the external contact 8 is in the OFF state. It is in. However, the boiler water is periodically blown to prevent the salt concentration from exceeding a specified level, and by this blowing, chemicals in the boiler water are also discharged. Since water is supplied, a situation occurs where the concentration of chemicals in the boiler water becomes lower than a predetermined value. Therefore,
During the blowing period, it is necessary to inject a larger amount of chemical than during normal operation, and therefore, during the blowing period, the external contact 8 is turned on to increase the amount of chemical injection to prevent the concentration of the chemical from decreasing. To explain this specifically, the pulse control circuit 5 is set to output a pulse of, for example, 10 Hz during steady operation, and a pulse of, for example, 100 Hz is output during blowing, and the external contact 8 at this time is It is sufficient to link it with a blow valve, boiler can water level, make-up water pump, etc. Furthermore, the external contact 8 may be configured to be connected to a flow rate detector to detect the flow rate of the blow, as will be described later. It is also good.
尚、上記実施例に於いては、外部接点受付回路６に双方
向接点型のりレースイソチアを設けてなるが、本発明に
係る外部接点受付回路６のスイッチ７は決してこれに限
定されるものではなく、例えば第３図に示す如く単なる
開閉型のリレースイッチ７を使用して、該スイッチ７の
開時及び閉時にパルス制御回路５が夫々異なる周波数の
パルス信号を出力すべく構成されていてもよい。In the above embodiment, the external contact receiving circuit 6 is provided with a bidirectional contact type glue lace isothia, but the switch 7 of the external contact receiving circuit 6 according to the present invention is by no means limited to this. For example, as shown in FIG. 3, a simple open/close type relay switch 7 may be used, and the pulse control circuit 5 may be configured to output pulse signals of different frequencies when the switch 7 is opened and closed. .
また、上記実施例に於いては、パルスの周波数を例えば
１００Ｈｚ 、１０）１ｚの二段階に変更させる場合に
ついて説明し、外部接点受付回路６にスイッチ７を一個
だけ設けた例を挙げてなるが、本発明は該スイッチ７の
個数も問うものではなく、例えば第４図に示す如くスイ
ッチ７を複数個設けて該スイッチ７の個数と同数だけパ
ルスの周波数切換えを可能に構成しても何ら構わないの
である。Furthermore, in the above embodiment, a case will be described in which the pulse frequency is changed in two steps, for example, 100 Hz and 10) 1 z, and an example in which only one switch 7 is provided in the external contact reception circuit 6 is given. However, the present invention does not limit the number of switches 7; for example, as shown in FIG. 4, a plurality of switches 7 may be provided so that the frequency of pulses can be switched by the same number of switches 7. There isn't.
このように、本発明に係る外部接点受付回路６のスイッ
チ７の構成は設計変更自在であり、要は外部接点８の開
閉に連動して開閉または切換えられるスイッチであれば
よく、当然ながらその種類はリレースイッチに限定され
るものではない。As described above, the configuration of the switch 7 of the external contact receiving circuit 6 according to the present invention can be freely changed in design, and in short, it may be any switch that can be opened/closed or switched in conjunction with the opening/closing of the external contact 8. is not limited to relay switches.
また、上記実施例に於いては、外部接点８の一例として
レベルスイッチを挙げてなるが、該外部接点８の具体的
な種類は一切問うものではなく、それ以外に圧力スイッ
チ、流量検知器具、各種センサー、並びに手動式の押ボ
タン等種々のものが適応可能であり、また当然ながら該
外部接点８の個数も複数個であってもよい。Further, in the above embodiments, a level switch is cited as an example of the external contact 8, but the specific type of the external contact 8 is not limited at all, and other examples include a pressure switch, a flow rate detection device, Various sensors and manual pushbuttons can be used, and it goes without saying that the number of external contacts 8 may be plural.
更に、本発明はパルス制御回路５の具体的な構成も決し
て限定されるものではなく、本発明で言うパルス制御回
路５とはソレノイド駆動ポンプ供給されるパルスの周波
数を制御可能な機能を有するものであって、その具体的
な回路構成及び名称を一切問うものではない。但し、本
発明に係るパルス制御回路５は外部接点受付回路６のス
イッチ７の開閉又は切換え状態に応じて予め設定された
異なる周波数のパルスを出力する機能を有することが条
件となることは言う迄もない。Further, the present invention is not limited to the specific configuration of the pulse control circuit 5, and the pulse control circuit 5 referred to in the present invention is a circuit having a function of controlling the frequency of pulses supplied to a solenoid-driven pump. However, the specific circuit configuration and name are not questioned at all. However, it goes without saying that the pulse control circuit 5 according to the present invention must have a function of outputting pulses of preset different frequencies depending on the open/close or switching state of the switch 7 of the external contact receiving circuit 6. Nor.
その他、本発明は本発明の制御回路を構成する各部の具
体的な構成はすべて本発明の意図する範囲内にて設計変
更自在である。In addition, in the present invention, the design of the specific configuration of each part constituting the control circuit of the present invention can all be changed within the intended scope of the present invention.
（発明の効果）
畝上のように、本発明はソレノイド駆動回路に供給する
パルスの周波数を制御するためのパルス制御回路に外部
接点の開閉に連動して開閉又は切換えられるスイッチを
有する外部接点受付回路を接続して設けて、該スイッチ
の開閉又は切換えに応じて予め設定された異なる周波数
のパルスがパルス制御回路から出力されるべく構成して
なるために、前記パルスの周波数の変更調整作業が何ら
従来の如く制御回路に設けた機器を手作業にて操作する
ことなく単に外部接点の開閉操作のみで行えることとな
って、該周波数変更作業が外部から容易に遠隔操作でき
るに限らず、前記外部接点に各種センサー等を利用する
ことによってポンプ吐出量の自動制御も極めて簡易に行
えることとなり、そのポンプ運転の操作制御性を従来に
比して格段向上させることが出来るという優れた効果を
有するに至った。(Effects of the Invention) As described above, the present invention provides an external contact reception device having a switch that is opened/closed or switched in conjunction with the opening/closing of the external contact in a pulse control circuit for controlling the frequency of pulses supplied to the solenoid drive circuit. Since the pulse control circuit is configured so that pulses of different frequencies set in advance are outputted from the pulse control circuit according to the opening/closing or switching of the switch, the work of changing and adjusting the frequency of the pulses is difficult. This can be done by simply opening and closing external contacts without manually operating the equipment provided in the control circuit as in the past, and the frequency change operation can not only be easily controlled remotely from the outside, but also as described above. By using various sensors, etc. as external contacts, automatic control of the pump discharge amount can be performed extremely easily, and has the excellent effect of significantly improving the operational controllability of the pump operation compared to conventional methods. reached.
また、本発明はポンプ駆動用の制御回路に外部接点の開
閉により動作されるスイッチを所望数設けただけの極め
て面易な構成からなるために、その製作コストは非常に
安価なものであり、その実用的価（ｉは多大である。Furthermore, since the present invention has an extremely simple configuration in which the control circuit for driving the pump is provided with a desired number of switches that are operated by opening and closing external contacts, the manufacturing cost is extremely low. Its practical value (i is great).
第１図は本発明に係る制御回路の一実施例を示す説明図
。
第２図は使用状態の一例を示す説明図。
第３図及び第４図は他実施例を示す要部説明図、第５図
は従来例を示す説明図。
５・・・パルス制御回路 ６・・・夕）部接点受付回
路７・・・リレースイッチ ８・・・外部接点１０・
・・ソレノイド駆動回路FIG. 1 is an explanatory diagram showing one embodiment of a control circuit according to the present invention. FIG. 2 is an explanatory diagram showing an example of a usage state. FIGS. 3 and 4 are explanatory views of main parts showing other embodiments, and FIG. 5 is an explanatory view showing a conventional example. 5...Pulse control circuit 6...Event) contact reception circuit 7...Relay switch 8...External contact 10.
・Solenoid drive circuit
Claims (1)
制御を行うパルス制御回路５に、外部接点８の開閉に連
動して開閉または切換えられる一個または複数個のスイ
ッチ７を有する外部接点受付回路６を接続して設けて、
該外部接点受付回路６のスイッチ７の開閉又は切換えに
応じて前記パルス制御回路５から出力されるパルスの周
波数が予め設定された異なる周波数に変更されるべく構
成してなることを特徴とするソレノイド駆動ポンプの制
御回路。An external contact reception circuit 6 having one or more switches 7 that are opened/closed or switched in conjunction with the opening/closing of the external contacts 8 is connected to a pulse control circuit 5 that controls the frequency of pulse signals supplied to the solenoid drive circuit 10. and set it up,
A solenoid characterized in that the frequency of the pulses output from the pulse control circuit 5 is changed to a preset different frequency in response to opening/closing or switching of the switch 7 of the external contact receiving circuit 6. Drive pump control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25734185A JPS62118072A (en) | 1985-11-15 | 1985-11-15 | Control circuit for solenoid driven pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25734185A JPS62118072A (en) | 1985-11-15 | 1985-11-15 | Control circuit for solenoid driven pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62118072A true JPS62118072A (en) | 1987-05-29 |
Family
ID=17305018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25734185A Pending JPS62118072A (en) | 1985-11-15 | 1985-11-15 | Control circuit for solenoid driven pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62118072A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5815630A (en) * | 1981-07-20 | 1983-01-29 | Mitsubishi Electric Corp | Electrodes correct device for electric discharge machining |
-
1985
- 1985-11-15 JP JP25734185A patent/JPS62118072A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5815630A (en) * | 1981-07-20 | 1983-01-29 | Mitsubishi Electric Corp | Electrodes correct device for electric discharge machining |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4429392A (en) | Laser output controlling device | |
| US5125433A (en) | System for electronically controlling the temperature of water delivered to a bath, shower and the like | |
| EP0399236A3 (en) | Single input, single supply three-state controller | |
| JPS62118072A (en) | Control circuit for solenoid driven pump | |
| KR900001874B1 (en) | Air flow controlling apparatus | |
| US5815067A (en) | Single control wire device for HID dimming | |
| KR20070040603A (en) | Washing machine and control method for the same | |
| EP1467268B1 (en) | Decoder for watering system | |
| JP2000217395A (en) | Actuator controller | |
| US6501209B2 (en) | Piezoelectric transformer driving circuit | |
| JPH0314983A (en) | Remote controller for valve | |
| KR100774254B1 (en) | Free pulse timer equipment of method and free pulse timer equipment for a dust collectors | |
| JPH024394B2 (en) | ||
| US5952788A (en) | Vacuum fluorescent display filament drive circuit | |
| SU1465560A1 (en) | Spark-safe remote control apparatus | |
| KR0180412B1 (en) | Adjusting circuit of outside mirror in an automobile | |
| SU1029329A1 (en) | Device for remote program control of reversive electric apparatus | |
| JP3384387B2 (en) | Remote control transmitter with wired | |
| JPS60101374A (en) | Solenoid valve driving device | |
| JPS57137906A (en) | On-and-off controller | |
| JPS60205145A (en) | Terminal device for central control of air conditioner | |
| KR200311932Y1 (en) | Power cotrol unit | |
| JP2601857Y2 (en) | Local cleaning equipment | |
| JPH0376037B2 (en) | ||
| JPH09296775A (en) | Electromagnetic pump and liquid fuel supplying device |