EP0436439B1 - Gasventil mit Rückstromsicherung für Heisswassergerät ohne Zündflamme - Google Patents

Gasventil mit Rückstromsicherung für Heisswassergerät ohne Zündflamme Download PDF

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Publication number
EP0436439B1
EP0436439B1 EP90403780A EP90403780A EP0436439B1 EP 0436439 B1 EP0436439 B1 EP 0436439B1 EP 90403780 A EP90403780 A EP 90403780A EP 90403780 A EP90403780 A EP 90403780A EP 0436439 B1 EP0436439 B1 EP 0436439B1
Authority
EP
European Patent Office
Prior art keywords
cam
valve
diaphragm
button
hot water
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.)
Expired - Lifetime
Application number
EP90403780A
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English (en)
French (fr)
Other versions
EP0436439A1 (de
Inventor
Franck Guillaume
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.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
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 Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Publication of EP0436439A1 publication Critical patent/EP0436439A1/de
Application granted granted Critical
Publication of EP0436439B1 publication Critical patent/EP0436439B1/de
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F24H9/2042—Preventing or detecting the return of combustion gases
    • F24H9/205—Closing the energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/247—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using mechanical means

Definitions

  • the invention relates to an overflow safety gas inlet valve for stopping a device for producing hot water such as a water heater or a gas bath heater, in the case for example , draft anomaly in the flue gas evacuation pipe and applies particularly to devices without pilot.
  • a safety device must be able to react to any anomaly, due for example to a bad draft, a backflow, an obstruction of the duct or a extractor failure, anomaly which causes the combustion products to be pushed back into the room.
  • thermoelectric safety system In water heaters and bath heaters operating without a pilot light, and which therefore do not use a thermoelectric safety system, it was necessary to use safety mechanisms acting positively on the gas inlet valve to the device, and reacting for example to the action of a thermally sensitive element judiciously placed to take account of a rise in temperature in a flue gas evacuation pipe.
  • FR-A 2 606 854 in the name of the applicant, which consists in associating a rotary cocking button and a metastable mechanism of the kind with a blistering membrane linked to a sensitive bulb.
  • a rise in temperature of the products of combustion which gas inlet valve comprising a cam mounted rotatably around of its axis under the action of the button and which cooperates with the control rod of the gas inlet valve, said cam being remarkable in that it is also movable in translation on said axis under the action of the mechanism with blistering membrane to escape from the valve control rod and secure the device.
  • An object of the present invention therefore consists of an overflow safety gas inlet valve for hot water production device without pilot light, allowing the gas inlet valve to be closed in the event of an anomaly in the evacuation of its combustion products, comprising a rotary cocking button operating a cam acting on the valve stem and a metastable mechanism of the blistering membrane type linked to a bulb reacting to a rise in temperature of said combustion products, to cause the closure of the valve , said rotary cam also being displaceable in translation by the blistering membrane, so that it escapes from the valve control rod and puts the device in safety, valve according to which a blistering membrane is mounted at the end of the control box, in the extension of the cam, on the side opposite to the rotary cam drive button and centered on its axis of rotation, the diaphragm cooperating with ec the cam by means of an adjustable spacing pin.
  • the pawn is equipped with a crown which projects beyond a light provided in the housing and which ensures contact between the pin and the membrane.
  • the pin is provided with an external threaded part which cooperates with a corresponding tapped part provided axially and inside the cam, on the side of the latter facing the blistering membrane.
  • a body 1 of a gas inlet valve which contains a valve 2 connecting a gas inlet pipe 3 and a starting pipe 4 to the appliance.
  • a plug 5 for closing the tap body 1 is crossed in leaktight fashion by the operating rod 6 of the valve 2 normally returned to its seat by the spring 7.
  • the control box 8 for opening the valve is provided with a vertical tubular part 9 forming a chimney, which contains an axis 10 bearing against the operating rod 6.
  • This axis opens out inside the housing 8 and is supported on a cam 11.
  • the latter can rotate around its axis AA ′ under the action of a rotary button 12 with two positions which drives an operating needle 13 engaged in a recess with flat edges 14 provided in the cam 11.
  • a ball retaining device 15, integrated in the button 12 serves to maintain the latter in one or other of its two positions thanks to the housings 16 provided in the case.
  • the cam 11 with two adjacent cylindrical off-center sections has a cylindrical part 17 of smaller diameter close to a part 18 of larger diameter, both centered on the axis AA '.
  • a spring 19 is interposed between the cam and the control unit 8 and tends to move the cam away from the button 12 and hold it against a stop 20.
  • the other end of the cam receives a pin 21 whose head 22 is in abutment against a blistering membrane 23.
  • the latter forms a small waterproof case 24 connected by a conduit 25 to a bulb not shown, placed in the appropriate position, for example in a flue gas evacuation duct.
  • the box 24 is mounted at the end of the control box 8, that is to say that the blistering membrane and its pin 21 are in the extension of the cam 11 on the side opposite to the rotary button 12 for driving said cam, and centered on its axis of rotation AA '.
  • the head 22 is in abutment against the concave face at rest, of the membrane 23, the cam 11 itself being applied to its stop 20 under the action of the spring 19. It is therefore possible to operate the button 12 so that the larger diameter portion 18 of the cam 11 pushes back the axis 10 to open the valve 2.
  • the device is armed, the button 12 remaining in this position thanks to the locking of the retaining device 15.
  • the device is positively safe because in the event of a bulb leakage or failure, the blistering membrane immediately takes on the convex shape for which there is action on the cam and securing the device.
  • the depth of the support pin of the blistering membrane can be adjusted manually relative to the cam.
  • the pin 21 is adjustable and advantageously equipped with a crown 26 which projects beyond a light 27 provided in the case 8 and which allows the position of the pin to be adjusted.
  • the latter is provided with an external threaded portion 28 which cooperates with a corresponding threaded portion provided axially and inside the cam on the side facing the blistering membrane 23.
  • the rotation of the crown 26 therefore makes it possible to ensure the contact of the pin with the membrane 23.
  • the crown is operated only once to ensure this contact.
  • the pin-cam assembly is then glued at the factory.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Claims (4)

  1. Gaszuführventil mit Rückstromsicherung für ein Heißwassergerät ohne Wachflamme, das ein Schließen der Gaszufuhrklappe (2) im Falle einer Störung der Ableitung seiner Verbrennungsprodukte ermöglicht und aufweist einen Drehknopf (12) für das Sichern, der ein Steuerteil (11) betätigt, das auf den Stößel (6) der Klappe (2) wirkt und einen metastabilen Mechanismus von der Art einer ausgebauchten Membran (23), der mit einer Thermometerkugel verbunden ist, die auf eine Erhöhung der Temperatur der genannten Verbrennungsprodukte reagiert, um ein Schließen der Klappe (2) zu bewirken, wobei das genannte drehbare Steuerteil (11) weiterhin durch die gewölbte Membran (23) translatorisch verschiebbar ist, so daß sie vom Stößel (6), der die Klappe (2) betätigt, freikommt und das Gerät in den Sicherheitszustand bringt, dadurch gekennzeichnet, daß die gewölbte Membran (23) am Endbereich des Steuergehäuses (8) und in Verlängerung des Steuerteils (11) dem Drehknopf (12) für die Betätigung des Steuerteils (11) gegenüberliegend und zentriert auf dessen Rotationsachse AA' angeordnet ist, und daß die Membran (23) mit dem Steuerteil (11) über ein Zwischenstück (21) einstellbaren Abstandes zusammenwirkt.
  2. Ventil nach Anspruch 1, dadurch gekennzeichnet, daß eine Feder (19), die zwischen dem Steuergehäuse (8) und dem Steuerteil (11) angeordnet ist, letzteres vom Drehknopf (12) elastisch wegbelastet und gegen einen Anschlag (20) hält.
  3. Ventil nach Anspruch 1, dadurch gekennzeichnet, daß das Zwischenstück (21) mit einer Krone (26) ausgerüstet ist, die an einen Freiraum (27) angrenzt, der im Gehäuse (8) vorgesehen ist und den Kontakt mit der Membran sicherstellt.
  4. Ventil nach Anspruch 3, dadurch gekennzeichnet, daß das Zwischenstück (21) einen Teilbereich mit Außengewinde (28) hat, welches mit einem entsprechenden Innengewindeteil zusammenwirkt, das axial und im Inneren des Steuerteils (11) an seiner der gewölbten Membran (23) gegenüberliegenden Seite vorgesehen ist.
EP90403780A 1990-01-04 1990-12-27 Gasventil mit Rückstromsicherung für Heisswassergerät ohne Zündflamme Expired - Lifetime EP0436439B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9000045A FR2656670B1 (fr) 1990-01-04 1990-01-04 Robinet d'admission gaz a securite de debordement pour appareil de production d'eau chaude sans veilleuse.
FR9000045 1990-01-04

Publications (2)

Publication Number Publication Date
EP0436439A1 EP0436439A1 (de) 1991-07-10
EP0436439B1 true EP0436439B1 (de) 1993-07-21

Family

ID=9392509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90403780A Expired - Lifetime EP0436439B1 (de) 1990-01-04 1990-12-27 Gasventil mit Rückstromsicherung für Heisswassergerät ohne Zündflamme

Country Status (4)

Country Link
EP (1) EP0436439B1 (de)
DE (1) DE69002317T2 (de)
ES (1) ES2042252T3 (de)
FR (1) FR2656670B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9522087D0 (en) * 1995-10-28 1996-01-03 Euro Plumbing Supplies Ltd Cut-off valve
CN112128431B (zh) * 2019-06-25 2021-08-20 宁波方太厨具有限公司 单向阀及应用有该单向阀的燃气热水器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080118A (en) * 1960-09-06 1963-03-05 Rheem Mfg Co Water heater and method of heating water
FR2606854B1 (fr) * 1986-11-17 1989-03-03 Sdecc Robinet d'admission gaz a securite integree pour appareil de production d'eau chaude sans veilleuse permanente
FR2631426B1 (fr) * 1988-05-11 1990-08-24 Sdecc Dispositif de securite individuelle et collective pour chauffe-bains a gaz sans veilleuse

Also Published As

Publication number Publication date
DE69002317T2 (de) 1993-12-02
FR2656670B1 (fr) 1992-04-24
ES2042252T3 (es) 1993-12-01
DE69002317D1 (de) 1993-08-26
EP0436439A1 (de) 1991-07-10
FR2656670A1 (fr) 1991-07-05

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