DE102015219182B4 - Pneumatic solenoid valve - Google Patents

Pneumatic solenoid valve

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Publication number
DE102015219182B4
DE102015219182B4 DE102015219182.6A DE102015219182A DE102015219182B4 DE 102015219182 B4 DE102015219182 B4 DE 102015219182B4 DE 102015219182 A DE102015219182 A DE 102015219182A DE 102015219182 B4 DE102015219182 B4 DE 102015219182B4
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DE
Germany
Prior art keywords
air
solenoid valve
armature
electromagnetic actuator
air chamber
Prior art date
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Active
Application number
DE102015219182.6A
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German (de)
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DE102015219182A1 (en
Inventor
Michael Beuschel
Stefan Bauer
Alexander Kerler
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Conti Temic Microelectronic GmbH
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Conti Temic Microelectronic GmbH
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Application filed by Conti Temic Microelectronic GmbH filed Critical Conti Temic Microelectronic GmbH
Priority to DE102015219182.6A priority Critical patent/DE102015219182B4/en
Publication of DE102015219182A1 publication Critical patent/DE102015219182A1/en
Application granted granted Critical
Publication of DE102015219182B4 publication Critical patent/DE102015219182B4/en
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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/06Electromagnets; Actuators including electromagnets
    • H01F7/08Electromagnets; Actuators including electromagnets with armatures
    • H01F7/14Pivoting armatures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603Multiple-way valves
    • F16K31/0624Lift valves
    • F16K31/0627Lift valves with movable valve member positioned between seats
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0675Electromagnet aspects, e.g. electric supply therefor
    • F16K31/0679Electromagnet aspects, e.g. electric supply therefor with more than one energising coil
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0682Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid with an articulated or pivot armature

Abstract

Pneumatic solenoid valve having an air chamber (1), in which a plurality of electromagnetic actuators (100, 100 ') are arranged and at which a plurality of air connections (2, 3, 5) are provided, which via a plurality of switching positions of the solenoid valve with the interposition of the air chamber (1) are interconnected, wherein the air ports (2, 3, 4) to the air chamber (1) are positioned such that in each open switching position of the solenoid valve, in which an air flow through the air chamber (1) flows, the air flow to at least one electromagnetic actuator (100) is guided past, wherein the plurality of electromagnetic actuators (100, 100 ') at least partially in the amount of supplied electrical energy in the operation of the respective electromagnetic actuator (100, 100') differ by means of energization, wherein the at least one electromagnetic Actuator (100), at which the air flow is passed in each open switching position, at least one electromagnetic actuator (1 00), the amount of supplied electrical energy is greatest when it is actuated by means of energization.

Description

  • The invention relates to a pneumatic solenoid valve.
  • In a variety of technical applications, pneumatic solenoid valves are used to control airflows. In these solenoid valves, a magnetic force is generated by means of a magnetic coil and thereby triggered a switching operation of the valve. One area of application of such solenoid valves is the filling of elastic air bubbles in a device for the pneumatic adjustment of a seat in a means of transport, such as e.g. a motor vehicle seat.
  • Conventional solenoid valves have the disadvantage that the magnetic force increases disproportionately strong when actuated by energizing the magnetic coil, which manifests itself in a loud switching noise in the form of a clink. The reason for this is that the air gap between the magnet coil or an associated yoke and a movable armature decreases with the path, which leads to the increase of the magnetic force with the distance traveled. This leads to a high speed of the armature, which is decelerated jerkily only when hitting a corresponding stop.
  • Furthermore, there is the problem in conventional solenoid valves that the electromagnetic actuators installed there lead to a strong generation of heat when they are actuated by means of current supply, which adversely affects the thermal availability of the solenoid valve or its service life.
  • From the publication DE 198 60 272 B4 a method for reducing the noise in a solenoid valve is known, in which the energization of the solenoid ramps upon actuation of the valve or drops.
  • Moreover, it is known to design the magnetic circuit in a solenoid valve such that the magnetic flux increases substantially only by the current of the magnetic coil and not by the movement of the armature.
  • From the document DE 10 2008 060 342 B3 a valve arrangement with common winding and valve nozzle support for two solenoid valves is known. Further, the document shows WO 2013/011340 A1 a valve assembly with windings in the pressurized valve chamber.
  • The documents US 5 048 564 A and DE 603 04 910 T2 disclose a solenoid valve having an actuator in a valve chamber, wherein an airflow flows past the actuator in an open position of the valve.
  • In an in DE 195 05 233 A1 disclosed solenoid valve is an actuator of the valve partially disposed in the valve chamber.
  • The document US 4 250 924 A discloses a solenoid valve whose actuator is arranged entirely in a valve chamber, wherein all valve ports are located on a side of the valve chamber opposite the actuator.
  • The object of the invention is to provide a pneumatic solenoid valve, which ensures reliable operation.
  • This object is achieved by the solenoid valve according to claim 1. Further developments of the invention are defined in the dependent claims.
  • The pneumatic solenoid valve according to the invention comprises an air chamber (valve chamber), in which one or more electromagnetic actuators are arranged and at which a plurality of air connections are provided, which are interconnected via a plurality of switching positions of the solenoid valve with the interposition of the air chamber. Here and below, an electromagnetic actuator is to be understood as an actuating element which converts electrical energy into a magnetic force, via which the actuation of the actuator is carried out. Preferably, the one or more electromagnetic actuators each comprise a magnetic coil, a yoke of soft magnetic material disposed on the magnetic coil and an armature movable relative to the yoke, which is also formed of soft magnetic material.
  • The solenoid valve according to the invention is characterized in that the air connections to the air chamber are positioned such that in each open switching position of the solenoid valve, in which an air flow flows through the air chamber, this air flow is passed past at least one electromagnetic actuator. Preferably, the at least one electromagnetic actuator flows around this air stream. In a preferred variant, all other electromagnetic actuators, to which not in each open switching position of the solenoid valve, an air flow is passed, arranged in the air chamber such that at these other actuators in at least one open switching position of the solenoid valve, an air flow is passed. Preferably, these other actuators are flowed around by this air flow.
  • In the solenoid valve according to the invention are in the air chamber more electromagnetic Actuators arranged, which differ at least partially in the amount of supplied electrical energy in the operation of the respective electromagnetic actuator by means of current supply. This difference between supplied amounts of electrical energy may arise, on the one hand, in that an electromagnetic actuator requires a higher current flow in its actuation than another electromagnetic actuator, and on the other hand in that an electromagnetic actuator is energized for a longer time during its actuation as another electromagnetic actuator. In this pneumatic solenoid valve, the at least one electromagnetic actuator, past which the air flow passes in each open switching position, comprises at least one electromagnetic actuator whose amount of supplied electrical energy is greatest when it is actuated by means of current supply. In other words, such actuators, which have a higher power loss, cooled particularly well by a corresponding air flow in each open switching position of the solenoid valve.
  • According to the invention a sufficient cooling of electromagnetic actuators in a pneumatic solenoid valve is achieved in that the actuators are arranged in the corresponding air chamber and at least one actuator is cooled in all open switching positions of the solenoid valve by an air flow. In this way, the heat development of the solenoid valve can be efficiently reduced during its energization.
  • In a particularly preferred embodiment, the air flow occurring in each open switching position of the solenoid valve is guided past an elongated magnetic coil of the at least one actuator in its longitudinal direction. As a result, a particularly efficient cooling of the solenoid valve is ensured.
  • In a further, particularly preferred variant, the solenoid valve according to the invention comprises an air connection in the form of a working connection, which serves for filling and / or emptying a pneumatic unit (for example an air bubble). Furthermore, one or more further air connections are provided in the form of one or more supply air connections and / or exhaust air connections. A supply air connection serves to supply air into the air chamber, whereas an exhaust air connection serves for the removal of air from the air chamber. The working port is disposed at a first end of the air chamber, whereas a supply air port and / or an exhaust port is positioned at a second end of the air chamber opposite the first end. With this variant can be achieved in a particularly simple manner, a passing of air to a corresponding electromagnetic actuator in the pneumatic solenoid valve.
  • In a simple non-inventive embodiment of the solenoid valve, only a single electromagnetic actuator is arranged in the air chamber. Preferably, both a supply air connection and an exhaust air connection are positioned at the second end of the air chamber.
  • In a preferred variant of the invention, a plurality of electromagnetic actuators are arranged one behind the other in the direction from the first end to the second end of the air chamber, wherein an associated air connection and / or associated exhaust connection is located behind each electromagnetic actuator, each opened by the electromagnetic actuator located in front of it and closed. In this case, for at least one electromagnetic actuator, which is not adjacent to the second end of the air chamber, and in particular for each electromagnetic actuator, which is not adjacent to the second end of the air chamber, the amount of supplied electrical energy in its operation by means of energization is greater than the amount of supplied electrical energy in the operation of the next, underlying electromagnetic actuator by means of energization. Preferably, for each electromagnetic actuator, which is not adjacent to the second end of the air chamber, the amount of supplied electrical energy at its actuation by energization is at least as large as the amount of supplied electrical energy in the operation of the next, underlying electromagnetic actuator by means of energization. With this variant of the invention it is ensured that the cooling of an electromagnetic actuator by means of an air flow is the higher, the greater its power loss.
  • In one embodiment of the embodiment just described, two electromagnetic actuators are (exactly) arranged in the air chamber, with the electromagnetic actuator being adjacent to the first end of the air chamber is located, only a single, lying behind supply air connection, which is opened when energized by the electromagnetic actuator, and wherein the electromagnetic actuator, which is disposed adjacent to the second end of the air chamber, only a single, lying behind exhaust port belongs to at Current supply is opened by the electromagnetic actuator.
  • In a modified variant, in the solenoid valve according to the invention again (exactly) two electromagnetic actuators are arranged, now belongs to the electromagnetic actuator, which is adjacent to the first end of the air chamber, only a single, lying behind exhaust port, which when energized by the electromagnetic Actuator is closed. In contrast, belongs to the electromagnetic actuator, which is arranged adjacent to the second end of the air chamber, only a single, lying behind supply air connection, which is opened when energized by the electromagnetic actuator.
  • In a further preferred variant of the solenoid valve according to the invention, one or more of the electromagnetic actuators and preferably all electromagnetic actuators of the magnetic valve according to the invention each comprise a magnetic coil, a magnetic coil arranged on the yoke of soft magnetic material and a movable relative to the yoke anchor of soft magnetic material, wherein the armature with respect to the yoke arranged such that it rotates when energized the magnetic coil by means of the magnetic force generated thereby by a single axis of rotation against a restoring force until the magnetic force of the restoring force, wherein upon rotation of the armature, the size of at least one overlap region between Yoke and anchor changed and in which at least one overlap region, an air gap between the yoke and anchor is formed. The distance between yoke and armature formed by the air gap remains substantially constant in the direction of the rotation of the armature. This distance may remain constant at least in some areas in the direction perpendicular to the rotation of the armature, but it may also vary in that direction if necessary.
  • The solenoid valve of this embodiment has the advantage that over the substantially constant air gap, a proportionally controllable valve is provided, so that there is no loud noise during operation of the valve. The valve thus has low switching noise. In addition, it is achieved by the arrangement of the entire magnetic circuit in the air chamber, that no further sealing planes are required, which otherwise affect the magnetic sphere by additional air gaps.
  • In a particularly preferred embodiment, the solenoid valve according to the invention is designed such that upon energization of the magnetic coil a constant (i.e., path-independent) magnetic force or a magnetic force linearly increasing along the path is formed. A linearly increasing magnetic force can e.g. be achieved by a linear increase of the current of the solenoid during the switching operation of the valve. At the same time in this embodiment, the restoring force increases during the rotation of the armature, whereby it is achieved that the armature assumes a predetermined end position. It is ensured that the restoring force increases faster than a possibly linearly increasing magnetic force. The restoring force can be generated in the solenoid valve according to the invention in various ways. In a preferred variant, a leaf spring is attached to the anchor for this purpose.
  • In a further embodiment of the solenoid valve according to the invention, the yoke is contacted by the armature at at least one point, preferably along the individual axis of rotation. As a result, the power loss of the solenoid valve can be minimized. In a further, particularly preferred embodiment, a lever mechanism is formed on the armature in such a way that the magnetic force which occurs when the magnet coil is energized at the end of the armature opposite the axis of rotation is translated into a greater force for closing or opening an air opening.
  • In a further embodiment, the armature is rigidly connected to a projection, wherein on the projection, a sealing element is located, which closes an air opening upon rotation of the armature by means of the magnetic force which is generated by energizing the magnetic coil. Without energization of the magnetic coil, the sealing element preferably closes a different air opening. In this way, a simple conversion of the magnetic force is achieved in a closing force for an air opening. Preferably, the projection on which the sealing element is part of the above-described lever mechanism, i. the closing force generated on the sealing element is greater than the magnetic force at the opposite end of the armature axis of rotation.
  • In a further embodiment of the solenoid valve according to the invention, the armature comprises at least one opening, in which one end of the yoke penetrates upon rotation of the armature and thereby the distance between the yoke and armature formed by the air gap (ie the distance between the opening edge and yoke) in the direction of rotation of the armature remains substantially constant.
  • In a further embodiment, the armature is secured by a guide against tilting about the axis of rotation, wherein the guide is preferably formed on a bobbin belonging to the magnetic coil, that is, on a winding body on which the winding of the magnetic coil is wound. The guide can be realized in various ways. In one variant, the guide comprises a guide nose, which extends through an opening of the anchor. In another variant, the guide comprises a leaf spring fixed to at least one point with the anchor and at least one other point is firmly connected to the bobbin or the yoke.
  • In a development of the invention, at least part of the yoke is arranged in an inner cavity of a coil body belonging to the magnet coil. The inner cavity of the bobbin is preferably completely filled with soft magnetic material of the yoke, so that the coil can be made small in diameter and thereby the electrical efficiency is increased.
  • In a further embodiment of the solenoid valve according to the invention, the yoke is U-shaped, wherein at the end of at least one leg of the yoke, an overlap region between the yoke and armature upon rotation of the armature is formed.
  • In order to supply current to the magnetic coil, in a preferred variant it is connected to at least one pin, preferably two or more pins, which is led out of the air chamber via a sealed opening to a circuit board.
  • The valve according to the invention can be provided for various applications. Preferably, the solenoid valve is used for filling and / or emptying at least one elastic air bubble in a device for the pneumatic adjustment of a seat in a means of transport. In other words, the invention also includes a device for the pneumatic adjustment of a seat in a means of transport with at least one elastic air bubble and a solenoid valve for filling and / or emptying the at least one air bubble.
  • An embodiment of the invention will be described below in detail with reference to the accompanying drawings.
  • Show it:
    • 1 a sectional view of a solenoid valve according to a first embodiment not according to the invention with a single electromagnetic actuator in the de-energized state;
    • 2 a sectional view analogous to 1 with energized electromagnetic actuator;
    • 3 a plan view of the in the solenoid valve of 1 and 2 built anchor;
    • 4 a plan view of the in the solenoid valve of 1 and 2 built-in leaf spring;
    • 5 a plan view of the in the solenoid valve of 1 and 2 built-in clip;
    • 6 a sectional view of a solenoid valve according to a second embodiment of the invention with two electromagnetic actuators; and
    • 7 a sectional view of a solenoid valve according to a third embodiment of the invention with two electromagnetic actuators.
  • The invention will be described below with reference to embodiments of solenoid valves which are used for filling and venting an elastic air bubble (not shown) in a device for the pneumatic adjustment of a motor vehicle seat.
  • 1 shows a 3/2 solenoid valve according to a first embodiment not according to the invention. The solenoid valve includes an air chamber 1 with appropriate air connections 2 . 3 and 4 , The top of the air chamber is through a cover plate 14 covered airtight. Above the cover plate 14 there is a circuit board 16 , in turn, by means of a lid 15 is covered.
  • The air connection 2 the air chamber 1 leads to the air bubble and represents the working port of the solenoid valve. The filling of the air bubble via a compressed air supply (not shown), which is on the channel 5 is connected, in turn, via the air opening or the supply air connection 3 with the air chamber 1 connected is. For venting or discharging compressed air from the air bubble, the upper opening or the exhaust port 4 used, with the interposition of a damping element 23 Foam is connected to the environment. The damping element reduces the outwardly urgent noise of the valve.
  • Inside the air chamber 1 is a single electromagnetic actuator 100 arranged, the components described below 6 . 601 . 7 . 8th . 9 . 10 . 11 and 12 includes. In particular, the actuator includes a magnetic coil 6 that a winding 601 includes, which on a bobbin 7 is wound up. Further, in the air chamber, a U-shaped yoke 8th arranged of soft magnetic material, wherein the lower leg of the U-shaped yoke through a cavity of the bobbin 7 extends. The upper leg of the yoke 8th runs on the winding 601 the bobbin over and extends through an opening in an upper extension of the bobbin 7 ,
  • Inside the air chamber 1 is also the anchor shown in section 9 , which consists of soft magnetic material and energizing the coil 6 by magnetic force around a single axis of rotation A is twisted, as will be explained in more detail below. In the anchor openings are punched out. In particular, the anchor comprises an upper opening 20 , a subsequent T-shaped opening 22 (please refer 3 ) and a lower opening 21 , The openings 20 and 21 are square shaped (see 3 ), but may also have other cross-sections (in particular rectangular and for the opening 20 also circular or elliptical, for which the following description is then mutatis mutandis modified).
  • The lower edge of the opening 21 lies on the lower leg of the yoke 8th on, whereby a contact line between the yoke and anchor is formed, which is also the axis of rotation A of the anchor 9 when energizing the coil 6 represents.
  • At the anchor 9 is a clip 10 attached, from which a projection 11 protruding, on which an elastic sealing element 12 located. In the in 1 shown non-energized state of the coil is the sealing element 12 at the opening 3 whereas the opening 4 is open. In this switching position of the valve is a venting of the bubble by an air flow from the terminal 2 over the air chamber 1 towards the opening 4 ,
  • The bobbin 7 includes a guide nose 13 , which is a tilting of the axis of rotation A of the anchor 9 This prevents the guide nose in the opening 22 (please refer 3 ) is guided. When energizing the coil 6 a magnetic force is generated which is the armature 9 to the yoke 8th draws. The four edges of the upper square opening overlap 20 with the upper end of the yoke 8th , Likewise, a corresponding overlap of three edges of the lower opening increases 21 with the lower end of the yoke 8th , 2 shows the end position of the anchor 9 when energizing the coil. As you can see, the anchor is 9 no longer facing the yoke 8th tilted, but extends in a vertical direction.
  • In the solenoid shown, the air gap remains L between the edges of the upper square opening 20 and the yoke 8th and the air gap L 'between the edges of the lower square opening 21 and the yoke 8th in the direction of rotation of the armature, regardless of the size of the overlap between yoke and armature substantially constant. This is again in 3 clarified. In particular, one recognizes the air gap L between the edge of the upper opening 20 and the upper leg of the yoke 8th and the air gap L 'between the edge of the lower opening 21 and the lower leg of the yoke 8th , It should be noted that along the lower edge of the opening 21 There is no air gap, because there touch the yoke and the anchor directly to a line of contact. Along this line of contact runs the axis of rotation A of the anchor, as already mentioned.
  • According to 3 is the size of the air gap L or. L ' constant along the edges of the opening. However, this does not have to be so realized. Rather, it is decisive that the distance between the armature formed by the air gaps 9 and yoke 8th in the direction of rotation of the armature, ie along respective perpendicular to the plane extending lines, remains constant. In contrast, the size of the air gap along the circumference of the openings 20 and 21 may vary. In particular, for example, the left and right sides of the air gap L ' also slightly sloping down. This ensures that the armature in the area of the axis of rotation A centered to the yoke. The size of the air gap at the other edges is about 0.2 mm.
  • Due to the substantially constant air gap in the direction of rotation of the armature 9 It is achieved that the magnetic force acting on the armature only depends on the current and not on how strongly the armature has approached the yoke. In contrast to conventional solenoid valves, in which the air gap decreases with increasing displacement of the armature and thereby the magnetic force increases, is with the solenoid valve of the 1 and 2 created a proportional valve whose magnetic force is constant with constant energization of the coil. In the solenoid valve of 1 or. 2 is also a leaf spring 19 provided, which acts opposite to the magnetic force and thus generates a restoring force. The leaf spring is in the upper area on the bobbin 7 and at the bottom of the anchor 9 as well as the clip 10 attached. The restoring force increases with increasing rotation of the armature when the coil is energized, until it is finally the same as the constant magnetic force, whereby the in 2 shown end position of the armature is achieved. The structure of the leaf spring 19 will be explained below by means of 4 explained in more detail. Likewise, the structure of the clip 10 below based on 5 explained in more detail.
  • How to get out 2 detects, the energization of the coil leads to a rotation of the armature 9 around the axis of rotation A , In the in 2 shown end position is then the sealing element 12 sealing at the upper opening 4 whereas the opening 3 of the air duct 5 now open. In this switching position, compressed air from a compressed air supply comes through the duct 5 , the chamber 1 and the connection 2 led to the bubble to the filling. The valve of 1 and 2 thus represents a 3/2-way valve with three air connections and two switch positions.
  • The energization of the winding 601 the coil 6 via electrical pins 17 extending through an opening in the cover plate 14 extend and with a corresponding electrical contact of the board 16 are connected. The opening in the Cover plate is sealed, eg by gluing, pressing or injecting. It thus occurs through this opening no air from the pressurized air chamber 1 out. Out 1 and 2 is also a lattice filter 18 visible, which avoids the penetration of particles from the elastic bubble.
  • From the already mentioned above 3 is also the shape of the middle opening 22 of the anchor 9 seen. The opening has the shape of an inverted letter T, wherein in the vertical bar of the letter T, the guide nose 13 engages which the lateral tilting of the armature 9 prevented. In contrast, the vertical bar of the letter T is used for the passage of an upper locking lug 10a of the clip 10 , This latch is very good from the below explained 5 seen.
  • Out 4 is again in plan view, the leaf spring 19 can be seen in 1 and 2 is shown in section. The leaf spring consists of a metal sheet, which in four places 19a kinked. At the upper end, the leaf spring has a T-shape. There, the attachment of the leaf spring takes place on the bobbin 7 , Within a central opening of the leaf spring is a projecting lobe 19b with a recess 19c , When installed, the leaf spring is the cloth 19b on the inside surface of the clip 10 on, with the latch 10a of the clip 10 over the recess 19c was pushed. In the clip 10 with the cloth inserted in it 19b becomes the lower part of the anchor 9 used. The anchor is doing over the locking lug 10a as well as the two lower locking lugs 10b (please refer 5 ) on the clip 10 locked. About a bending of the lobe 19b opposite the rest of the leaf spring 19 a corresponding restoring force is generated. This becomes greater with greater rotation of the armature when current is applied to the coil, until finally the end position is reached at which the generated magnetic force corresponds to the restoring force of the leaf spring.
  • By means of the leaf spring 19 in the installed state, on the one hand, a force is generated, which is the anchor 9 upwards and towards the solenoid pulls to the axis of rotation A of the anchor 9 to fix. On the other hand, the deformation of the leaf spring generates at the height of the axis of rotation A a torque which is the armature of the coil 6 tilts away and at the same time the sealing element 12 on the lower opening 3 of the air duct 5 suppressed. This torque is achieved by the locking of the leaf spring at the upper end of the bobbin 7 intercepted.
  • As already mentioned, the shows 5 a top view of the clip 10 out 1 and 2 , You can see the three projections 10a and 10b with which the anchor is locked in the clip. Furthermore, again is the lead 11 seen on which the sealing element 12 located.
  • A feature of the embodiment described above is that the working connection 2 on the one hand and the supply air connection 3 and the exhaust connection 4 on the other hand at opposite ends of the air chamber 1 are arranged. This has the consequence that both the venting of the air bubble by opening the exhaust port 4 (Switching position of 1 ) as well as when filling the air bubble by opening the supply air connection 3 (Switching position of 2 ) the electromagnetic actuator 100 and in particular its associated coil is flowed around by air, which via the working port 2 enters the air chamber or via the working connection 2 flows towards the bubble. In this way, an efficient cooling of the solenoid is ensured when energized in all switching positions of the solenoid valve.
  • 6 shows a sectional view of a second embodiment of the invention the solenoid valve. Both in the solenoid valve the 6 as well as in the solenoid valve of the 7 are two electromagnetic actuators 100 and 100 ' in a row in a common air chamber 1 arranged. The structure of the individual actuators and the remaining components of the valve largely corresponds to the structure of the solenoid valve 1 , Accordingly, a description of the same and corresponding components will be omitted. It will be only the differences of the embodiments of 6 and 7 in comparison to 1 explained.
  • How to get out 6 recognize, are in the air chamber 1 two identically constructed electromagnetic actuators 100 and 100 ' in the longitudinal direction of this air chamber (ie in 6 from left to right) arranged one behind the other. The actors 100 and 100 ' are the same structure as the corresponding actuator 100 out 1 , Unlike the actor 1 now serves the actor 100 out 6 only for opening and closing a supply air opening 3 a corresponding supply air duct 5 , In other words, compared to 1 an upper exhaust port 4 through a closed stop or valve seat 24a replaced. The actor 100 out 6 thus has only two connections and two switch positions. Also the actor 100 ' has only two openings and two switch positions. In contrast to the actuator 100 the 6 is instead of a supply air opening 3 now an exhaust port 4 with inserted therein damping element 23 on the floor of the air chamber 1 intended. In analogy to the actuator 100 is located above the sealing element 12 of the actor 100 ' a closed stop or valve seat 24b ,
  • The solenoid valve of 6 represents a 3/3-NC valve, which in 6 is shown in its closed position. By energizing the solenoid coil of the actuator 100 In this case, a filling of the corresponding air bubble is effected, whereas by energizing the magnetic coil of the actuator 100 ' a venting of the air bubble is achieved. The actor 100 out 6 requires a higher current to open the air duct as a filling actuator 5 , because it is designed for a high actuation force due to the high pressure difference between the admission pressure and the air bubble applied to this valve seat (up to approx. 1 bar). In comparison, the actuator needed 100 ' a lower actuation force, since here only the much lower pressure difference between the environment and bubble at the corresponding vent 4 is applied. Consequently, to operate the actuator 100 more electrical energy needed than to operate the actuator 100 ' , In other words, the actor points 100 a higher power loss than the actuator 100 ' on. Consequently arises upon actuation of the actuator 100 more heat than when actuating the actuator 100 ' , As a result, the actor became 100 adjacent to the work connection 2 arranged so that this both during filling and during emptying of the work connection 2 Connected air bubble flows around the air and thereby cooled efficiently. This is for the actor 100 ' not the case, because this is only around when venting the air bubble around air.
  • 7 shows a modification of the embodiment 6 , In analogy to 6 are in turn two actuators 100 and 100 ' in a common air chamber 1 arranged. The actor 100 However, now is a bleed actuator, on the current in the de-energized state an upper vent 4 with inserted therein damping element 23 is opened. In this de-energized state, the sealing element is located 11 of the actuator on a closed stop or nozzle seat 24c on. When the current is supplied to the actuator, the vent opening is closed 4 , In contrast to this is the actor 100 ' out 7 now a filling actuator, the supply air opening in the currentless state shown 3 a supply air duct 5 closes. When the actuator is energized, this supply air opening becomes 4 open. The sealing element strikes 12 of the actuator to a corresponding closed stop or nozzle seat 24d on.
  • With the solenoid valve the 7 a 3/3-NO valve is created, which in 7 is shown in the open state. It should be noted that the energization of the venting actuator 100 always usually over a longer period than the energization of the filling actuator 100 ' , This is because the holding state with closed vent is always taken a longer time than the state of filling the corresponding air bubble. Consequently, when energizing the bleed actuator 100 due to the longer holding state more energy than when energizing the actuator 100 ' needed. This does not change the fact that the actor 100 ' a higher current is needed to open the supply air connection. Overall, in a process of actuation of the corresponding actuator by means of energization, the energy required for this purpose in the actuator 100 higher than the actuator 100 ' , As a result, the actuator becomes 100 adjacent to the work connection 2 arranged so that it flows around both during filling and when emptying the air bubble of air. This is for the actor 100 ' not the case, only when filling the air bubble 2 is surrounded by air.
  • The embodiments of the invention described above have a number of advantages. In particular, by means of a suitable arrangement of a working connection and of supply air and exhaust air connections to an air chamber, efficient cooling of the electromagnetic actuator (s) provided therein is achieved by means of the air flows occurring in the open switching positions. In particular, it is also ensured that actuators which have a high power loss, both during filling and during venting are cooled by an air flow.
  • LIST OF REFERENCE NUMBERS
  • 1
    air chamber
    100, 100 '
    electromagnetic actuators
    2, 3, 4
    air connections
    5
    air duct
    6
    solenoid
    601
    Winding of the magnetic coil
    7
    Coil of the magnetic coil
    8th
    yoke
    9
    anchor
    10
    clip
    10a, 10b
    Latching noses of the clip
    11
    Projection of the clip
    12
    sealing element
    13
    Guide nose of the bobbin
    14
    cover
    15
    cover
    16
    circuit board
    17
    Pin code
    18
    grid filter
    19
    leaf spring
    19a
    Kinking of the leaf spring
    19b
    Lobe of the leaf spring
    19c
    Recess on the tab of the leaf spring
    20, 21, 22
    Openings in the anchor
    23
    damping element
    24a, 24b, 24c, 24d
    closed stops
    L, L '
    air gaps
    A
    axis of rotation

Claims (12)

  1. Pneumatic solenoid valve having an air chamber (1), in which a plurality of electromagnetic actuators (100, 100 ') are arranged and at which a plurality of air connections (2, 3, 5) are provided, which via a plurality of switching positions of the solenoid valve with the interposition of the air chamber (1) are interconnected, wherein the air ports (2, 3, 4) to the air chamber (1) are positioned such that in each open switching position of the solenoid valve, in which an air flow through the air chamber (1) flows, the air flow to at least one electromagnetic actuator (100) is guided past, wherein the plurality of electromagnetic actuators (100, 100 ') at least partially in the amount of supplied electrical energy in the operation of the respective electromagnetic actuator (100, 100') differ by means of energization, wherein the at least one electromagnetic Actuator (100), at which the air flow is passed in each open switching position, at least one electromagnetic actuator (1 00), the amount of supplied electrical energy is greatest when it is actuated by means of energization.
  2. Solenoid valve after Claim 1 , characterized in that the air flow past an elongated magnetic coil (6) of the at least one electromagnetic actuator (100) in the longitudinal direction thereof.
  3. Solenoid valve after Claim 1 or 2 , characterized in that the solenoid valve comprises a working connection (2) for filling and / or emptying a pneumatic unit and one or more supply air connections (3) and / or exhaust connections (4) for the air chamber (1), wherein the working connection (2) is arranged at a first end of the air chamber (1) and wherein a supply air connection (3) and / or an exhaust air connection (4) at a second end opposite to the first end of the air chamber (1) is arranged.
  4. Solenoid valve according to one of the preceding claims in combination with Claim 3 , characterized in that a plurality of electromagnetic actuators (100, 100 ') in the direction from the first end to the second end of the air chamber (1) are arranged one behind the other, wherein behind each electromagnetic actuator (100, 100') an associated supply air connection (3 ) and / or associated exhaust port (4), each of which is opened and closed by the electromagnetic actuator (100, 100 ') in front of it, and wherein for at least one electromagnetic actuator (100) the amount of electrical energy supplied when it is actuated by Current supply is greater than the amount of supplied electrical energy in the operation of the next, underlying electromagnetic actuator (100 ') by means of energization is.
  5. Solenoid valve after Claim 4 characterized in that in the air chamber (1) two electromagnetic actuators (100, 100 ') are arranged, wherein the electromagnetic actuator (100) which is adjacent to the first end of the air chamber (1), only a single, behind it lying to the electromagnetic actuator (100 ') which is adjacent to the second end of the air chamber (1), only a single, lying behind it Exhaust port (4) belongs, which is opened when energized by the electromagnetic actuator (100 ').
  6. Solenoid valve after Claim 4 characterized in that in the air chamber (1) two electromagnetic actuators (100, 100 ') are arranged, wherein the electromagnetic actuator (100) which is adjacent to the first end of the air chamber (1), only a single, behind it lying to the electromagnetic actuator (100 ') which is adjacent to the second end of the air chamber (1), only a single, lying behind supply air connection (3 ), which is opened when energized by the electromagnetic actuator (100 ').
  7. Solenoid valve according to one of the preceding claims, characterized in that one or more of the electromagnetic actuators (100, 100 ') and preferably all electromagnetic actuators each have a magnetic coil (6), a to the magnetic coil (6) arranged yoke (8) of soft magnetic material and a soft magnetic material armature (9) movable relative to the yoke (8), the armature (9) being movable relative to the armature (9) Yoke (8) is arranged such that it rotates when energizing the magnetic coil (6) by means of the magnetic force generated thereby about a single axis of rotation (A) against a restoring force until the magnetic force of the restoring force, wherein upon rotation of the armature (9) the size of at least one overlap region between the yoke (8) and armature (9) changed and in the at least one overlap region, an air gap (L, L ') between the yoke (8) and armature (9) is formed, which by Air gap (L, L ') formed distance between the yoke (8) and armature (9) in the direction of rotation of the armature (9) remains substantially constant.
  8. Solenoid valve after Claim 7 , characterized in that the solenoid valve is designed such that on the energization of the magnetic coil (6) forms a constant magnetic force or a linearly increasing magnetic force and the restoring force increases during the rotation of the armature (9).
  9. Solenoid valve after Claim 7 or 8th , characterized in that a leaf spring (19) for generating the restoring force on the armature (9) is mounted.
  10. Solenoid valve according to one of the Claims 7 to 9 , characterized in that the yoke (8) is contacted by the armature (9) at at least one point, preferably along the single axis of rotation (A).
  11. Solenoid valve according to one of the Claims 7 to 10 , characterized in that a lever mechanism on the armature (9) is designed such that the magnetic force which occurs when energizing the magnetic coil (6) at the opposite end of the axis of rotation (A) lying end of the armature, in a larger force to close an air opening ( 4) is implemented.
  12. Device for the pneumatic adjustment of a seat in a transport with at least one elastic air bubble and a solenoid valve according to one of the preceding claims for filling and / or emptying the at least one air bubble.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4250924A (en) 1978-01-17 1981-02-17 Aisin Seiki Kabushiki Kaisha Electromagnetic control valve assembly
US5048564A (en) 1989-06-02 1991-09-17 Matrix S.R.L. High-speed solenoid valve for a fluid under pressure, e.g. for pneumatic circuits
DE19505233A1 (en) 1995-02-16 1996-08-29 Samson Ag Electromagnetic valve with pivot axis in plane of pole faces
DE19860272B4 (en) 1998-12-24 2005-03-10 Conti Temic Microelectronic Method and device for reducing noise in electromagnetically actuated devices
DE60304910T2 (en) 2002-02-15 2006-11-09 Delphi Technologies, Inc., Troy Solenoid valve, vacuum diaphragm assembly and vacuum brake booster
DE102008060342B3 (en) 2008-12-03 2010-07-15 Festo Ag & Co. Kg Magnetic valve e.g. 2/2-way valve, arrangement for dynamically controllable seat of motor vehicle, has actuation units including inference body, which is gripped in intermediate region using limb i.e. fastening limb
WO2013011340A1 (en) 2011-07-20 2013-01-24 Kongsberg Automotive Ab Solenoid valve assembly for a seat of a vehicle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4250924A (en) 1978-01-17 1981-02-17 Aisin Seiki Kabushiki Kaisha Electromagnetic control valve assembly
US5048564A (en) 1989-06-02 1991-09-17 Matrix S.R.L. High-speed solenoid valve for a fluid under pressure, e.g. for pneumatic circuits
DE19505233A1 (en) 1995-02-16 1996-08-29 Samson Ag Electromagnetic valve with pivot axis in plane of pole faces
DE19860272B4 (en) 1998-12-24 2005-03-10 Conti Temic Microelectronic Method and device for reducing noise in electromagnetically actuated devices
DE60304910T2 (en) 2002-02-15 2006-11-09 Delphi Technologies, Inc., Troy Solenoid valve, vacuum diaphragm assembly and vacuum brake booster
DE102008060342B3 (en) 2008-12-03 2010-07-15 Festo Ag & Co. Kg Magnetic valve e.g. 2/2-way valve, arrangement for dynamically controllable seat of motor vehicle, has actuation units including inference body, which is gripped in intermediate region using limb i.e. fastening limb
WO2013011340A1 (en) 2011-07-20 2013-01-24 Kongsberg Automotive Ab Solenoid valve assembly for a seat of a vehicle

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