EP2087265A2 - Électrovalve - Google Patents

Électrovalve

Info

Publication number
EP2087265A2
EP2087265A2 EP07825500A EP07825500A EP2087265A2 EP 2087265 A2 EP2087265 A2 EP 2087265A2 EP 07825500 A EP07825500 A EP 07825500A EP 07825500 A EP07825500 A EP 07825500A EP 2087265 A2 EP2087265 A2 EP 2087265A2
Authority
EP
European Patent Office
Prior art keywords
slider
plunger
solenoid valve
fluid
inlet duct
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.)
Withdrawn
Application number
EP07825500A
Other languages
German (de)
English (en)
Inventor
Claudio Bottinelli
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.)
Ceme SpA
Original Assignee
Ceme SpA
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 Ceme SpA filed Critical Ceme SpA
Publication of EP2087265A2 publication Critical patent/EP2087265A2/fr
Priority to IT000016U priority Critical patent/ITMI20130016U1/it
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/024—Devices for relieving the pressure on the sealing faces for lift valves using an auxiliary valve on the main valve

Definitions

  • the present invention has as its subject a solenoid valve which has an application in apparatuses where there is a need to regulate a flow of water or water vapour.
  • the present invention has an application in steam boilers used in domestic electrical appliances such as, for example, machines for the production of coffee or ironing systems .
  • Solenoid valves of known type comprise a main body made, for example, out of brass, into which flows an inlet union connectable to a boiler of a domestic electrical appliance. Inside the above- mentioned inlet union is formed a duct through which a fluid is made to flow into the inside of the solenoid valve. Similarly, the main body is connected to an outlet union inside which is formed a duct for the outflow of the fluid.
  • a plunger which, when actuated by a control device, regulates the transit of fluid from the inlet duct to the outlet duct.
  • This control device comprises a cylindrical slider (or nucleus) connected coaxially and rigidly to the plunger, and an electromagnetic coil.
  • the plunger is dragged by the slider in such a way as to open or close the passage between the inlet and outlet ducts.
  • Solenoid valves of known type are normally closed and are opened when a user requires fluid.
  • the solenoid valves which operate according to an opposite principle.
  • the solenoid valves are normally open and are closed as required.
  • Around the stem is located an electromagnetic coil for moving the slider.
  • the solenoid valve when the solenoid valve is to be opened, the coil is supplied and generates an electromagnetic field which acts on the slider. Since the slider is made of ferromagnetic material, the slider is lifted and drags the plunger which liberates the passage between the inlet duct and the outlet duct. When the flow is to be closed, the supply to the coil is suspended and a return spring lowers the slider. The plunger therefore returns to prevent the passage of fluid.
  • Solenoid valves of known type however have a number of disadvantages.
  • the slider is subject to a pressure difference which is opposed to the electromagnetic force necessary for its lifting.
  • the end in which the housing for the plunger is formed is subject to the outlet pressure which is less than the inlet pressure.
  • the outlet pressure which is less than the inlet pressure.
  • An object of the present invention is therefore to provide a solenoid valve which resolves the above- mentioned disadvantages.
  • figure 1 shows an exploded perspective view of a solenoid valve according to the present invention
  • figures 2, 3 and 4 each represent a sectional view of the solenoid valve shown in figure 1, in three distinct operating conditions.
  • No. 1 indicates a solenoid valve in accordance with the present invention.
  • Solenoid valve 1 includes a hollow body 2 into which flows an inlet duct 3 to allow the inflow of a fluid such as, for example, water or water vapour.
  • Solenoid valve 1 includes an inlet union 4 which forms at least in part the inlet duct 3.
  • outlet duct 5 through which the above-mentioned fluid exits.
  • solenoid valve 1 includes an outlet union 6 which forms at least in part the outlet duct 5.
  • Inlet duct 3 is in communication with outlet duct 5 through a communicating orifice 7.
  • Solenoid valve 1 includes a plunger 8 located inside hollow body 2 and movable between a closed position in which it prevents the transit of the fluid from inlet duct 3 to outlet duct 5, and an open position, in which it allows the transit of the fluid from inlet duct 3 to outlet duct 5.
  • plunger 8 in the closed position plunger 8 obstructs orifice 7, while in the open position plunger 8 keeps this orifice 7 free and the fluid can pass freely.
  • Solenoid valve 1 also includes a slider (or nucleus) 9 for activating the plunger 8, slidably movable inside a closing stem 10.
  • This stem 10 consists of a hollow cylindrical body which is screwed onto hollow body 2 for closing solenoid valve 1. Between stem 10 and hollow body 2 is a gasket 11 which ensures the closure seal.
  • stem 10 can be made of plastic material .
  • Solenoid valve 1 furthermore includes means 12 for compensating the pressure.
  • means 12 for compensating the pressure In fact, between slider 9 and stem 10 there is fluid at the pressure of the inlet fluid. However, the pressure in the outlet duct 5 is acting over a base surface 9a of slider 9 facing plunger 8. In this way, a pressure difference acts on slider 9 which generates a force opposing the lifting of slider 9 and therefore opposing the opening of solenoid valve 1.
  • compensation means 12 acting on slider 9 thus produce a cancelling-out of this force.
  • compensation means 12 include a cage 13 which coaxially connects slider 9 to plunger 8.
  • Cage 13 consists of a tubular body and has a first end 13a connected to slider 9 and a second end 13b connected to plunger 8.
  • Slider 9 has a groove 14 which extends circumferentially over a lateral surface 9b.
  • Cage 13 has edges bent inwards in proximity to its first end 13a which engage in groove 14 in such a way that the above-mentioned base surface 9a of slider 9 is enveloped by cage 13. In this way, cage 13 can slide with respect to slider 9 coaxially with the latter.
  • Cage 13 also has bent edges in proximity to its second end 13b which rigidly clasp plunger 8. Slider 9 can therefore move closer to and further from plunger 8.
  • Plunger 8 with cage 13 and slider 9 can assume different configurations during the use of solenoid valve 1.
  • plunger 8 In the closed configuration (figure 2) of solenoid valve 1, plunger 8 is in its closed position and therefore prevents the outflow of fluid, while slider 9 is in contact with plunger 8.
  • the open configuration (figure 4) of solenoid valve 1 plunger 8 is in its open position and slider 9 is distanced from plunger 8.
  • compensation means 12 are activated on slider 9 and include a compensation chamber 15 formed by plunger 8, base surface 9a of slider 9 and cage 13 itself. Compensation chamber 15 is in fluid communication with inlet duct 3 by bypassing through openings 16 formed in proximity to ends 13a, 13b of cage 13. In this way, before plunger 8 is lifted, leaving orifice 7 free, compensation chamber 15 is filled with fluid at the pressure in the inlet duct 3. At this point, the whole of slider 9 is subject to the same pressure, and the pressure difference mentioned above is cancelled out. Solenoid valve 1 also includes an electromagnetic coil 17 located around stem 10 which acts on slider
  • coil 17 is supplied and generates an electromagnetic field. This field originates a force on slider 9, which is lifted.
  • cage 13 can be made of a plastic material.
  • cage 13 can be made of polyetheretherketone (PEEK), or of liquid crystal polymer material.
  • the invention achieves the proposed objects and obtains important advantages.
  • compensation chamber 15 is formed, into which flows fluid at the pressure of inlet duct 3.
  • the above- mentioned pressure ' difference is thus cancelled out, and consequently the force opposed to the opening of solenoid valve 1 is also cancelled out.
  • the energy required for moving slider 9, and therefore for opening solenoid valve 1 is reduced.
  • solenoid valve 1 since it is no longer necessary to provide energy also for opposing the force deriving from the pressure difference, the opening of solenoid valve 1 ends up being faster and the delay in response of solenoid valve 1 is consequently reduced.
  • One advantage attributable to solenoid valve 1 according to the present invention relates to the fact that some of its components, like cage 13 and stem 10, can be made in plastic material. This characteristic allows the overall weight of the solenoid valve 1 to be reduced, and it also entails a simplification of the production process for these components.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention porte sue une électrovalve ayant un corps creux (2); un conduit d'entrée (3) pour permettre l'entrée d'un fluide dans le corps creux (2) ; un conduit de sortie (4) pour permettre la sortie du fluide à partir du corps creux (2); un piston (8) disposé dans le corps creux (2) et mobile de façon réversible entre une position fermée dans laquelle il empêche le passage du fluide du conduit d'entrée (3) au conduit de sortie (5), et une position ouverte dans laquelle il permet le passage du fluide du conduit d'entrée (3) au conduit de sortie (5) ; et une coulisse (9) pour activer le piston (8) sur lequel une pression est exercée par le fluide dans le conduit d'entrée (3). L'électrovalve comprend en outre des moyens (12) pour compenser la pression exercée sur la coulisse (9) ; lesdits moyens (12), en réponse à une commande pour ouvrir le piston (8), donnent naissance à une pression sur la coulisse (9), laquelle s'oppose à ladite pression exercée sur la coulisse (9) par le fluide dans le conduit d'entrée (3).
EP07825500A 2006-10-24 2007-10-18 Électrovalve Withdrawn EP2087265A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT000016U ITMI20130016U1 (it) 2007-10-18 2013-01-16 Elettrovalvola

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT002042A ITMI20062042A1 (it) 2006-10-24 2006-10-24 Elettrovalvola
PCT/IB2007/003222 WO2008050227A2 (fr) 2006-10-24 2007-10-18 Électrovalve

Publications (1)

Publication Number Publication Date
EP2087265A2 true EP2087265A2 (fr) 2009-08-12

Family

ID=39273423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07825500A Withdrawn EP2087265A2 (fr) 2006-10-24 2007-10-18 Électrovalve

Country Status (4)

Country Link
EP (1) EP2087265A2 (fr)
DE (1) DE202007019292U1 (fr)
IT (1) ITMI20062042A1 (fr)
WO (1) WO2008050227A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20092204A1 (it) * 2009-12-16 2011-06-17 Ceme Spa Elettrovalvola multi-materiale
EP2921753B1 (fr) * 2014-03-21 2017-06-28 Safran Aero Boosters SA Electrovanne aérospatiale pour gaz croygénique haute pression
DE102015200072A1 (de) * 2015-01-07 2016-07-07 Continental Teves Ag & Co. Ohg Ventilsitzträger
DE102017207208A1 (de) * 2017-04-28 2018-10-31 Robert Bosch Gmbh Ventil zum Einstellen eines Fluidstroms
IT202100024896A1 (it) * 2021-09-29 2023-03-29 Emerson Automation Fluid Control & Pneumatics Italy S R L Valvola a solenoide

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003045352A2 (fr) * 2001-11-21 2003-06-05 Alza Corporation Dispositif de distribution osmotique dote d'une valve bidirectionnelle et a reglage automatique dynamique de canal d'ecoulement
FR2852301A1 (fr) * 2003-03-13 2004-09-17 Valois Sas Dispositif de distribution de produit fluide

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797526A (en) * 1972-08-21 1974-03-19 E Champeon Cage valve with pilot and mechanical operating means
FR2706566B1 (fr) * 1993-06-16 1995-09-01 Sagem Allumage Clapet pour électrovanne, et circuit de recyclage de vapeurs d'essence comportant un tel clapet.
FR2713302B1 (fr) * 1993-12-01 1996-03-01 Eaton Sa Monaco Distributeur de liquide fonctionnant avec des électrovannes.
DE19529724A1 (de) * 1995-08-12 1997-02-13 Teves Gmbh Alfred Elektromagnetventil, insbesondere für hydraulische Kraftfahrzeugbremsanlagen mit Radschlupfregelung
DE29706717U1 (de) * 1997-04-14 1997-07-17 Buerkert Werke Gmbh & Co Breitbandventil
DE29912814U1 (de) * 1999-07-22 1999-12-02 Buerkert Werke Gmbh & Co Zapfsystem für Tanksäulen
NO312114B1 (no) * 2000-05-22 2002-03-18 Paul Tengesdal Ventil for regulering av en fluidström

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003045352A2 (fr) * 2001-11-21 2003-06-05 Alza Corporation Dispositif de distribution osmotique dote d'une valve bidirectionnelle et a reglage automatique dynamique de canal d'ecoulement
FR2852301A1 (fr) * 2003-03-13 2004-09-17 Valois Sas Dispositif de distribution de produit fluide

Also Published As

Publication number Publication date
WO2008050227A3 (fr) 2008-07-17
WO2008050227A2 (fr) 2008-05-02
DE202007019292U1 (de) 2012-01-02
ITMI20062042A1 (it) 2008-04-25

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