JPH0587267A - Self-holding valve - Google Patents
Self-holding valveInfo
- Publication number
- JPH0587267A JPH0587267A JP24581091A JP24581091A JPH0587267A JP H0587267 A JPH0587267 A JP H0587267A JP 24581091 A JP24581091 A JP 24581091A JP 24581091 A JP24581091 A JP 24581091A JP H0587267 A JPH0587267 A JP H0587267A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- permanent magnet
- fixed magnetic
- magnetic poles
- closed
- 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
- Magnetically Actuated Valves (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はガス、液体などの流体の
流れの断続を行うバルブに関し、特に電気信号によって
弁の開閉を行うことの出来るバルブに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve for interrupting the flow of a fluid such as gas or liquid, and more particularly to a valve which can be opened and closed by an electric signal.
【０００２】[0002]
【従来の技術】電気信号によって弁の開閉を行って流体
の流れの断続を行うバルブとしてソレノイドバルブがあ
る。これは、軟磁性体で作られたコアの先端にゴムなど
で作られた弁体が付いており、この弁体をスプリングの
力で弁座に押し付けて、弁を閉じている。軟磁性体コア
のまわりに配置されたソレノイドコイルに通電すること
によって、軟磁性体コアをソレノイドコイルのなかに吸
引して、弁体を弁座から離して弁を開く。ソレノイドコ
イルの通電を止めると、軟磁性体コアはスプリングの力
で弁座の方向に戻されて、弁が閉じられる。2. Description of the Related Art There is a solenoid valve as a valve that opens and closes a valve by an electric signal to interrupt the flow of a fluid. In this, a valve body made of rubber or the like is attached to the tip of a core made of a soft magnetic material, and the valve body is pressed against a valve seat by the force of a spring to close the valve. By energizing the solenoid coil arranged around the soft magnetic core, the soft magnetic core is attracted into the solenoid coil, and the valve body is separated from the valve seat to open the valve. When the energization of the solenoid coil is stopped, the soft magnetic core is returned toward the valve seat by the force of the spring, and the valve is closed.
【０００３】かかるノーマリクローズ型とは逆に、常時
はスプリングの力で弁を開いておき、ソレノイドコイル
に通電したときに、弁が閉となるノーマリオープン型の
ものも使われている。Contrary to the normally closed type, there is also used a normally open type in which the valve is normally opened by the force of a spring and the valve is closed when the solenoid coil is energized.
【０００４】弁座のオリフィスの開口面積を面積比で、
１，２，４，８とした４個のバルブの弁の開閉をするの
に、上に述べたソレノイドバルブの駆動部が使われてい
る。このようにオリフィスの面積比を１，２，４，８と
したものを使うことによって流体の流量をディジタル式
に調整することが出来る。すなわち、面積比１と２のバ
ルブに通電した場合、３の流量が得られ、面積比１と４
のバルブに通電した場合、５の流量が得られる。このバ
ルブはディジタルバルブと呼ばれている。The opening area of the orifice of the valve seat is expressed by the area ratio,
The solenoid valve drive described above is used to open and close the four valves 1, 2, 4, and 8. By using the orifices having the area ratios of 1, 2, 4, and 8 in this manner, the fluid flow rate can be digitally adjusted. That is, when a valve having an area ratio of 1 and 2 is energized, a flow rate of 3 is obtained, and an area ratio of 1 and 4 is obtained.
When the valve is energized, a flow rate of 5 is obtained. This valve is called a digital valve.
【０００５】ディジタルバルブは流体の流量を関数変換
で調整することが出来るので燃料電池に使われることが
多い。燃料電池の空気極に供給する酸素量（空気）、そ
のバーナー部に供給する空気量及びメタン量、その改質
器に供給するメタン量及び水蒸気量を、燃料電池の負荷
変動に合わせて調整する必要があるのでディジタルバル
ブが使われる。Digital valves are often used in fuel cells because the flow rate of fluid can be adjusted by function conversion. Adjust the amount of oxygen (air) supplied to the air electrode of the fuel cell, the amount of air and methane supplied to the burner section, and the amount of methane and steam supplied to the reformer according to the load fluctuation of the fuel cell. Digital valves are used because they are necessary.
【０００６】[0006]
【発明が解決しようとする課題】ディジタルバルブで燃
料電池に供給される空気、メタン、水蒸気量を調整する
ことは燃料電池を正常に運転する上で必要なことである
が、燃料電池で作った電力の約１％をディジタルバルブ
を駆動するのに消費してしまう。弁体を開閉するのにソ
レノイドコイルに電流を流し、開又は閉に保持している
間、電流を流していなければならないので消費電力が大
きいものとなっている。It is necessary to adjust the amount of air, methane, and water vapor supplied to the fuel cell with the digital valve in order to operate the fuel cell normally. About 1% of the electric power is consumed to drive the digital valve. A current is applied to the solenoid coil to open and close the valve element, and the current must be applied while the valve element is held open or closed, resulting in high power consumption.
【０００７】そこで本発明の目的とするところは、ソレ
ノイドコイルを流れる電流によって弁の開閉を行うが、
開及び閉に保持している間は電流を流さなくともよい自
己保持バルブを提供することである。Therefore, the object of the present invention is to open and close the valve by the current flowing through the solenoid coil.
The purpose is to provide a self-retaining valve that does not need to be energized while being held open and closed.
【０００８】本発明の他の目的は、弁の開あるいは閉の
位置で流体の圧力に抗して弁を付勢することの出来るバ
ルブを提供することである。Another object of the present invention is to provide a valve capable of energizing the valve against the fluid pressure in the open or closed position of the valve.
【０００９】[0009]
【課題を解決するための手段】本発明の自己保持バルブ
は、軸心の方向に往復動出来る軸、この軸に固定され軸
とともに往復動が出来て軸方向に磁化された永久磁石、
軸方向に間隙をおいて並べられた３個の固定磁極、この
３個の固定磁極をＮ−Ｓ−Ｎ及びＳ−Ｎ−Ｓと励磁する
磁化コイル、及び上記の軸の運動によって開閉される弁
体を有しており、弁体の閉止位置において前記磁化コイ
ルの非通電状態で前記永久磁石と固定磁極間の吸引力に
よって弁体を弁座に付勢しているものである。The self-holding valve of the present invention comprises a shaft which can reciprocate in the axial direction, a permanent magnet which is fixed to the shaft and can reciprocate together with the shaft and is magnetized in the axial direction,
Three fixed magnetic poles arranged with a gap in the axial direction, a magnetizing coil for exciting the three fixed magnetic poles N-S-N and S-N-S, and opening and closing by the movement of the shaft. A valve body is provided, and the valve body is biased toward the valve seat by the attractive force between the permanent magnet and the fixed magnetic pole in the non-energized state of the magnetizing coil at the closed position of the valve body.
【００１０】弁座のオリフィスから流体が供給される場
合、弁体は閉位置で流体の圧力に抗して弁座に押し付け
られているような付勢力が、磁化コイルの非通電状態
で、永久磁石と磁極間の吸引力によって生じることが望
ましい。When the fluid is supplied from the orifice of the valve seat, the urging force such that the valve body is pressed against the valve seat in the closed position against the pressure of the fluid is permanently applied when the magnetizing coil is not energized. It is desirable to be generated by the attractive force between the magnet and the magnetic pole.
【００１１】また、弁の開放時の付勢力よりも、弁の閉
止時の付勢力が大きいことが望ましい。Further, it is desirable that the biasing force when the valve is closed is larger than the biasing force when the valve is open.
【００１２】弁の閉止時に流体の圧力が異常に高くなっ
て弁体が不用意に動いたときに、弁体の動きを検出する
検出器を備えておき、この検出器からの信号によって、
弁を閉の方向に動かす電流を磁化コイルに流すことも本
発明の一変形として可能である。A detector is provided for detecting the movement of the valve body when the valve body is inadvertently moved due to an abnormally high fluid pressure when the valve is closed.
It is also possible as a variant of the invention to pass a current through the magnetizing coil which moves the valve in the closing direction.
【００１３】[0013]
【作用】磁化コイルの非通電時には、軸方向に磁化され
た永久磁石（例えばＮ−Ｓと磁化）は３個の固定磁極の
うちの２個の固定磁極間で安定する。この安定な位置は
２ヶ所あるので、その各々を弁の開と閉に対応するよう
にすると、弁は開及び閉で保持されるようになる。この
安定な位置は通常２個の固定磁極の中間点であるが、軸
方向に磁化された永久磁石と２個の磁極の吸引力は、非
通電時には最も小さくなる。この中間点から永久磁石を
少しずらすと、永久磁石と２個の固定磁極の吸引力が大
きくなって、中間点の方向に永久磁石を引く力が生じ
る。When the magnetizing coil is de-energized, the axially magnetized permanent magnet (for example, NS and magnetized) is stabilized between two fixed magnetic poles among the three fixed magnetic poles. Since there are two stable positions, the valve is held open and closed by making each of them correspond to the opening and closing of the valve. This stable position is normally the midpoint between the two fixed magnetic poles, but the attraction force between the axially magnetized permanent magnet and the two magnetic poles is the smallest when de-energized. When the permanent magnet is slightly displaced from this intermediate point, the attractive force between the permanent magnet and the two fixed magnetic poles becomes large, and a force for pulling the permanent magnet in the direction of the intermediate point is generated.
【００１４】中間点の方向に永久磁石を引き戻そうとす
る力は、永久磁石を中間点からずらすにともなって大き
くなる。弁体を弁座に押し付ける力が必要な場合、その
必要な力を永久磁石を中間点からある距離はなれた位置
で制止することによって得ることが出来る。特に、弁座
のオリフィスから流体が供給される場合は、弁の閉止状
態で流体の圧力が弁体にかかる。その圧力に抗して弁が
閉止しているように弁体に押し付ける力が必要なので、
永久磁石を中間位置からずれた位置で制止しておく必要
がある。The force for pulling the permanent magnet back toward the midpoint increases as the permanent magnet is moved away from the midpoint. If a force that pushes the valve body against the valve seat is required, that required force can be obtained by stopping the permanent magnet at a position some distance from the midpoint. Particularly, when the fluid is supplied from the orifice of the valve seat, the pressure of the fluid is applied to the valve body in the closed state of the valve. It is necessary to have a force to press against the valve body against the pressure so that the valve is closed,
It is necessary to hold the permanent magnet at a position displaced from the intermediate position.
【００１５】このように、弁が閉止状態にあるときに、
磁化コイルに通電して３個の固定磁極がＮ−Ｓ−Ｎと磁
化すると、永久磁石（Ｎ−Ｓと磁化）は３個の固定磁極
のうちのＮ−Ｓ間からＳ−Ｎ間に移動し、弁は開とな
る。通電が止まっても弁は同じ位置に停止している。次
に、磁化コイルに通電して３個の固定磁極がＳ−Ｎ−Ｓ
と磁化すると、永久磁石は固定磁極のＮ−Ｓ間からＳ−
Ｎ間に移動し、弁は閉となる。Thus, when the valve is in the closed state,
When the magnetizing coil is energized and the three fixed magnetic poles are magnetized N-S-N, the permanent magnet (N-S and magnetized) moves from N-S to S-N of the three fixed magnetic poles. Then the valve opens. The valve remains in the same position even when the power is turned off. Next, the magnetizing coil is energized so that the three fixed magnetic poles are S-N-S.
When magnetized, the permanent magnet will move from the fixed magnetic pole N-S to the S-
Moving between N, the valve closes.
【００１６】[0016]
【実施例】本発明の実施例を図面に従って説明する。図
１に本発明の自己保持バルブの断面図及び永久磁石の位
置と吸引力の関係を示す。軸方向にＳ−Ｎと磁化された
永久磁石１が軸２に固定されており、永久磁石１と軸２
はともにリニアアクチュエータ８のハウジング内に、上
下方向に往復動できるように保持されている。軸１の下
端には弁体３が固定されており、軸１の上下動に伴っ
て、弁体３が弁座４を開閉するようになっている。流体
の流路５及び流路６は弁室でつながっている。軟磁性材
料で出来た固定磁極１１，１２，１３は間隙を介して並
んでおり、各々の固定磁極間には磁化コイル２１及び２
２が配置されている。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a cross-sectional view of the self-holding valve of the present invention and the relationship between the position of the permanent magnet and the attractive force. The permanent magnet 1 magnetized as S-N in the axial direction is fixed to the shaft 2, and the permanent magnet 1 and the shaft 2
Are both held in the housing of the linear actuator 8 so as to be able to reciprocate in the vertical direction. The valve body 3 is fixed to the lower end of the shaft 1, and the valve body 3 opens and closes the valve seat 4 as the shaft 1 moves up and down. The fluid passage 5 and the passage 6 are connected by a valve chamber. The fixed magnetic poles 11, 12, 13 made of a soft magnetic material are arranged side by side with a gap, and the magnetizing coils 21 and 2 are provided between the fixed magnetic poles.
2 are arranged.
【００１７】磁化コイル２１及び２２は直流電源（図示
せず）に接続されて、上下端の固定磁極１１と１３は同
極性に、中央の固定磁極１２は固定磁極１１，１３と異
極性に磁化される。すなわち、固定磁極１１，１２，１
３は各々Ｎ−Ｓ−Ｎ及びＳ−Ｎ−Ｓと極性を持つ。磁化
コイル２１と２２への電流が切れると固定磁極１１，１
２，１３の磁気はなくなる。The magnetizing coils 21 and 22 are connected to a DC power source (not shown) so that the fixed magnetic poles 11 and 13 at the upper and lower ends have the same polarity, and the fixed magnetic pole 12 at the center has a different polarity from the fixed magnetic poles 11 and 13. To be done. That is, the fixed magnetic poles 11, 12, 1
3 has the polarities N-S-N and S-N-S, respectively. When the current to the magnetizing coils 21 and 22 is cut off, the fixed magnetic poles 11, 1
The magnetism of 2 and 13 disappears.
【００１８】リニアアクチュエータ８の永久磁石１の動
く範囲の上下端には、緩衝材７，７′が設けられてお
り、永久磁石１と軸２の衝撃を受けるようになってい
る。Cushions 7 and 7'are provided at the upper and lower ends of the range of movement of the permanent magnet 1 of the linear actuator 8 so that the permanent magnet 1 and the shaft 2 receive an impact.
【００１９】永久磁石１は上面にＳ極、下面にＮ極が来
るように軸方向磁化されている。この永久磁石として
は、磁化コイル２１，２２で発生する磁場で減磁しない
ような保磁力が大きく可逆透磁率が１に近いものが使わ
れる。例えばサマリウムコバルト磁石、ネオジミウム鉄
ボロン磁石、あるいはフェライト磁石が使われる。フェ
ライト磁石は残留磁束密度が２０００〜３０００ガウス
なので、大きな力を得ようとする場合はサマリウムコバ
ルトあるいはネオジミウム鉄ボロン磁石が望ましい。１
００℃以上になる環境で使う場合は、ネオジミウム鉄ボ
ロン磁石はキュリー点が低く、また耐食性に悪いので望
ましくない。The permanent magnet 1 is axially magnetized so that the S pole is on the upper surface and the N pole is on the lower surface. As this permanent magnet, one having a large coercive force that does not demagnetize by the magnetic field generated by the magnetizing coils 21 and 22 and a reversible magnetic permeability close to 1 is used. For example, a samarium cobalt magnet, a neodymium iron boron magnet, or a ferrite magnet is used. Since a ferrite magnet has a residual magnetic flux density of 2000 to 3000 gauss, a samarium cobalt or neodymium iron boron magnet is desirable when a large force is to be obtained. 1
The neodymium iron boron magnet is not desirable when used in an environment of higher than 00 ° C. because it has a low Curie point and poor corrosion resistance.
【００２０】永久磁石１がＡの位置にあるときは、永久
磁石１の下面のＮ極から出た磁力線が固定磁極１２から
周辺のヨークを通って上部の固定磁極１１に来て、永久
磁石１の上面のＳ極に戻る。この磁力線のループによっ
て永久磁石１はＡの位置に保持されている。When the permanent magnet 1 is in the position A, the magnetic field lines emitted from the N pole on the lower surface of the permanent magnet 1 come from the fixed magnetic pole 12 through the peripheral yoke to the fixed magnetic pole 11 on the upper side, and the permanent magnet 1 Return to the S pole on the upper surface of. The loop of the magnetic force lines holds the permanent magnet 1 at the position A.
【００２１】磁化コイル２１と２２に直流電流が流れ
て、固定磁極１１，１２，１３にＳ−Ｎ−Ｓの極性が生
じると、永久磁石１は下方に移動して、Ｂ位置に行っ
て、弁体３が弁座４を閉止する。この通電時の吸引力
は、図に示すように、固定磁極１１と１２の中央部Ｓ1
で最も大きく、永久磁石１がこの力によって下方に移動
するに従って小さくなり、固定磁極１２と１３の中央部
Ｓ2 で安定となる。When a direct current flows through the magnetizing coils 21 and 22 and S-N-S polarity is generated in the fixed magnetic poles 11, 12, 13, the permanent magnet 1 moves downward to the B position, The valve body 3 closes the valve seat 4. As shown in the figure, the attraction force at the time of energization is the central portion S 1 of the fixed magnetic poles 11 and 12.
, And becomes smaller as the permanent magnet 1 moves downward due to this force, and becomes stable at the central portion S 2 of the fixed magnetic poles 12 and 13.
【００２２】ここで磁化コイル２１と２２の電流を切る
と、永久磁石１のＮ極と固定磁極１３及び永久磁石１の
Ｓ極と固定磁極１２の間の吸引力によって、永久磁石１
はＢの位置に保持される。When the currents to the magnetizing coils 21 and 22 are cut off, the attractive force between the N pole of the permanent magnet 1 and the fixed magnetic pole 13 and the S pole of the permanent magnet 1 and the fixed magnetic pole 12 is applied to the permanent magnet 1.
Is held in the B position.
【００２３】次に、磁化コイル２１と２２に直流電流が
流れて、固定磁極１１，１２，１３にＮ−Ｓ−Ｎの極性
が生じると、永久磁石１は上方に移動して、弁が開かれ
る。Next, when a direct current flows through the magnetizing coils 21 and 22, and N-S-N polarities are generated in the fixed magnetic poles 11, 12, 13, the permanent magnet 1 moves upward and the valve opens. Be done.
【００２４】磁化コイル２１，２２への電流を流してい
ない状態での吸引力は、図の右端に示したグラフのよう
になっている。永久磁石１が中央の固定磁極１２から上
下に少しはずれた場所で大きな吸引力が生じ、上下の固
定磁極１１，１３と中央の固定磁極１２の中央部Ｓ1，
Ｓ2で最も吸引力が小さくなっている。そこで、弁が閉
じた状態で、永久磁石１の位置をＳ2に来るようにする
と弁は安定するが、弁体を弁座に付勢する力、すなわち
押し付け力はほとんど生じなくなる。本発明では、弁が
閉じた状態で、永久磁石１がＳ2よりも少し上のＢ点に
くるようにしているので、非通電状態でも永久磁石と固
定磁極の吸引力によって、永久磁石を下方に引く力が生
じて、弁体を弁座に押し付けることが出来る。The attraction force when no current is applied to the magnetizing coils 21 and 22 is as shown in the graph at the right end of the figure. A large attractive force is generated where the permanent magnet 1 is slightly displaced vertically from the central fixed magnetic pole 12, and the central portions S 1 , of the upper and lower fixed magnetic poles 11 and 13 and the central fixed magnetic pole 12 are generated.
The suction power is the smallest at S 2 . Therefore, when the position of the permanent magnet 1 is brought to S 2 with the valve closed, the valve becomes stable, but the force for urging the valve body toward the valve seat, that is, the pressing force hardly occurs. In the present invention, since the permanent magnet 1 is located at a point B slightly above S 2 with the valve closed, the permanent magnet is moved downward by the attraction force of the permanent magnet and the fixed magnetic pole even in the non-energized state. A pulling force is exerted on the valve body to press it against the valve seat.
【００２５】弁が開いている時にも、図面では、永久磁
石１が固定磁極１１と１２の中央部Ｓ1 よりも少し下の
Ａ点になるようにして、上方への力が加わるようにして
いる。弁が閉じているときは、必ずしもこの力は必要な
い。Even when the valve is open, in the drawing, the permanent magnet 1 is located at a point A slightly below the central portion S 1 of the fixed magnetic poles 11 and 12, so that an upward force is applied. There is. This force is not necessary when the valve is closed.
【００２６】流体が流路６から供給されて、流路５から
出て行くように使った場合、弁が閉じているときには、
流体の圧力が弁体３に加わるので、永久磁石１と固定磁
極１２，１３の間に生じる下方への押付け力が、流体の
圧力よりも大きいことが必要である。When the fluid is used to be supplied from the flow path 6 and exit from the flow path 5, when the valve is closed,
Since the fluid pressure is applied to the valve element 3, it is necessary that the downward pressing force generated between the permanent magnet 1 and the fixed magnetic poles 12 and 13 is larger than the fluid pressure.
【００２７】流体が流路５から供給されて流路６から出
て行くように使った場合、弁が閉じているときには、流
体の圧力が弁を閉じる方向に加わるので、永久磁石によ
る下方への押付け力はそれほど大きくは必要ない。When the fluid is used so as to be supplied from the flow path 5 and flow out from the flow path 6, the pressure of the fluid is applied in the direction of closing the valve when the valve is closed, so that the permanent magnet moves downward. The pressing force does not need to be that great.
【００２８】[0028]
【発明の効果】本発明の自己保持バルブは流路を開及び
閉とした状態で電流を流す必要がなく電力消費が少なく
てすむうえに、開及び閉の状態で弁体に付勢力が付いて
いるので安定な使用が可能である。EFFECTS OF THE INVENTION The self-holding valve of the present invention does not need to flow an electric current when the flow path is opened and closed and consumes less electric power. In addition, the valve body has an urging force in the open and closed states. Therefore, stable use is possible.
【図１】本発明の自己保持バルブの断面図と吸引力と永
久磁石の位置関係を示すグラフFIG. 1 is a cross-sectional view of a self-holding valve of the present invention and a graph showing a positional relationship between attraction force and permanent magnets.
１ 永久磁石 ２ 軸 ３ 弁体 ４ 弁座 １１，１２，１３ 固定磁極 ２１，２２ 磁化コイル 1 Permanent magnet 2 Axis 3 Valve body 4 Valve seat 11, 12, 13 Fixed magnetic pole 21, 22 Magnetizing coil
Claims (1)
れた永久磁石、 軸方向に間隙をおいて並べられた３個の固定磁極、 この３個の固定磁極をＮ−Ｓ−Ｎ及びＳ−Ｎ−Ｓと励磁
する磁化コイル、 上記の軸の運動によって開閉される弁体を有し、 弁体の閉止位置において前記磁化コイルの非通電状態で
前記永久磁石と固定磁極間の吸引力によって弁体を弁座
に付勢することを特徴とする自己保持バルブ。1. A shaft that can reciprocate in the axial direction, a permanent magnet that is fixed to the shaft and can reciprocate together with the shaft, and is magnetized in the axial direction, and three fixed magnetic poles arranged with a gap in the axial direction. A magnetizing coil that excites the three fixed magnetic poles N-S-N and S-N-S, and a valve body that is opened and closed by the movement of the above-mentioned shaft. A self-holding valve, wherein a valve body is biased toward a valve seat by an attraction force between the permanent magnet and the fixed magnetic pole in a non-energized state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24581091A JPH0587267A (en) | 1991-09-25 | 1991-09-25 | Self-holding valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24581091A JPH0587267A (en) | 1991-09-25 | 1991-09-25 | Self-holding valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0587267A true JPH0587267A (en) | 1993-04-06 |
Family
ID=17139186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24581091A Pending JPH0587267A (en) | 1991-09-25 | 1991-09-25 | Self-holding valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0587267A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030070261A (en) * | 2002-02-23 | 2003-08-30 | 주식회사 엠베스트 | Electromagnetic Strikers |
| CN101893112A (en) * | 2010-07-05 | 2010-11-24 | 清华大学 | Bi-stable state micro valve |
| CN114508600A (en) * | 2022-01-13 | 2022-05-17 | 中科首望无水染色智能装备(苏州)有限公司 | Electromagnetic strong-sealing flash explosion device and working method |
-
1991
- 1991-09-25 JP JP24581091A patent/JPH0587267A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030070261A (en) * | 2002-02-23 | 2003-08-30 | 주식회사 엠베스트 | Electromagnetic Strikers |
| CN101893112A (en) * | 2010-07-05 | 2010-11-24 | 清华大学 | Bi-stable state micro valve |
| CN114508600A (en) * | 2022-01-13 | 2022-05-17 | 中科首望无水染色智能装备(苏州)有限公司 | Electromagnetic strong-sealing flash explosion device and working method |
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