EP0084992B1 - Perfectionnement aux dispositifs à capsule manométrique de sécurité et de commande pour appareils instantanés à gaz - Google Patents

Perfectionnement aux dispositifs à capsule manométrique de sécurité et de commande pour appareils instantanés à gaz Download PDF

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Publication number
EP0084992B1
EP0084992B1 EP19830400081 EP83400081A EP0084992B1 EP 0084992 B1 EP0084992 B1 EP 0084992B1 EP 19830400081 EP19830400081 EP 19830400081 EP 83400081 A EP83400081 A EP 83400081A EP 0084992 B1 EP0084992 B1 EP 0084992B1
Authority
EP
European Patent Office
Prior art keywords
membrane
improvement according
small
plunger system
piston
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
Application number
EP19830400081
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0084992A1 (fr
Inventor
Jean-Claude Charron
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 EP0084992A1 publication Critical patent/EP0084992A1/fr
Application granted granted Critical
Publication of EP0084992B1 publication Critical patent/EP0084992B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/06—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bellows; using diaphragms
    • F23N5/067—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bellows; using diaphragms using mechanical means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/1407—Combustion failure responsive fuel safety cut-off for burners

Definitions

  • the invention which relates to control and safety devices for instantaneous gas appliances of the water heater or bath heater type relates more particularly to an improvement in small manometric capsules.
  • the flame detection devices operate according to several well-known and widely applied principles. Among these there is a system which not only ensures this safety role, but also that of a direct control member of a valve. It is a pressure capsule system consisting, as we know, of a small sealed enclosure or bulb filled with air placed in the flame that we want to detect, and of a capillary tube, connected to a nozzle closed by a small expandable membrane, this having the possibility of swelling under the effect of the expansion of the air contained in the bulb and of operating a valve for the admission of gas to the burner.
  • This system has the merit of being simple, but because of the mechanical energy that would be required if it were used as the main gas intake control member, it is preferred to use it upstream of the main control valve. , as a gas control and regulation device and particularly in instant hot water production devices operating without a permanent pilot.
  • the object of the invention is to avoid this drawback by allowing the pressure capsule to fill up again with air when the bulb is no longer heated by the flame to be detected.
  • the small expandable membrane is pierced with a central orifice allowing the passage of a push-button system cooperating with it to authorize, as soon as the heating and cooling of the bulb stops, the passage of air from the outside towards the inside of the manometric capsule via this orifice, the inside of the manometric capsule then being in depression with respect to the atmosphere.
  • the manometric capsule comprises a bulb, not shown, constituting the flame detector and a capillary tube 1 (fig. 1) which is connected to a well 2 provided in a small end piece 3. At the bottom of said end piece is crimped a small membrane. expandable 4 pierced with a central orifice 5 in the extension of the well 2 and the tube 1.
  • This small membrane 4 is supported on the upper face of a horizontal cup 7 of a piston 6, the central part of which carries a vertical guide rod 8 which passes through the orifice 5 of the membrane and which opens into the well 2 of end piece 3.
  • the piston 6 comprises at the connection edge between the vertical rod 8 and the horizontal cup 7, a chamfer 9 which serves as a bearing surface for the lip 10 limiting the orifice 5 of the membrane 4.
  • the horizontal cup 7 has over its entire length a groove 11; similarly, the vertical rod 8 also includes over its entire length a groove 12.
  • the underside of the piston 6 is provided with a bulge 13 bearing on a rocker lever 14 for controlling a valve (not shown) for admitting the gas.
  • a cap 15 force-fitted around the endpiece 3 supports the piston 6 before mounting the lever 14 and serves as crimping for the membrane 4.
  • the air contained in the manometric capsule ends up escaping by osmosis through the membrane or the solderings between the bulb and the capillary tube so that as soon as l 'heating and cooling of the bulb stop, the interior of the pressure capsule is in depression compared to the atmosphere.
  • the membrane 4 is sucked inwards (FIG. 3) and the lip 10 comes off the chamfer 9 which allows the outside air to enter the tube 1 and the bulb passing through the grooves 11 and 12.
  • FIGS. 4 and 5 illustrate two other variants of the invention.
  • the piston 6 is replaced by a small diabolo 17, the central part of which has small grooves 18.
  • the membrane 4 and the small diabolo 17 are sucked inwards so that the upper face of said diabolo abuts against the base of the capillary tube 1.
  • the lip 10 of the membrane peels off from the diabolo 17 and releases the grooves 18 for the passage of air which again fills the manometric capsule.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Temperature-Responsive Valves (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Control Of Combustion (AREA)
  • Devices For Medical Bathing And Washing (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Safety Valves (AREA)
EP19830400081 1982-01-25 1983-01-13 Perfectionnement aux dispositifs à capsule manométrique de sécurité et de commande pour appareils instantanés à gaz Expired EP0084992B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8201060A FR2520486A1 (fr) 1982-01-25 1982-01-25 Perfectionnement aux dispositifs a capsule manometrique de securite et de commande pour appareils instantanes a gaz
FR8201060 1982-01-25

Publications (2)

Publication Number Publication Date
EP0084992A1 EP0084992A1 (fr) 1983-08-03
EP0084992B1 true EP0084992B1 (fr) 1986-12-03

Family

ID=9270272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830400081 Expired EP0084992B1 (fr) 1982-01-25 1983-01-13 Perfectionnement aux dispositifs à capsule manométrique de sécurité et de commande pour appareils instantanés à gaz

Country Status (6)

Country Link
US (1) US4518003A (enrdf_load_stackoverflow)
EP (1) EP0084992B1 (enrdf_load_stackoverflow)
JP (1) JPS5935717A (enrdf_load_stackoverflow)
DE (1) DE3368116D1 (enrdf_load_stackoverflow)
ES (1) ES285718Y (enrdf_load_stackoverflow)
FR (1) FR2520486A1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT387646B (de) * 1984-09-10 1989-02-27 Vaillant Gmbh Rueckstromsicherung fuer eine brennstoffbeheizte waermequelle
EP0280406A1 (en) * 1987-02-07 1988-08-31 Concentric Controls Limited Flame failure devices

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20835A (en) * 1858-07-06 Steam-alarm and safety apparatus
US2704648A (en) * 1955-03-22 Diaphragm operated pivoted valve
USRE20835E (en) 1938-08-23 Thermostatically controlled device
US2217419A (en) * 1935-12-24 1940-10-08 Metals & Controls Corp Thermostatically controlled device
US2746471A (en) * 1952-03-29 1956-05-22 Penn Controls Pressure regulator and shut-off valve
FR1301169A (fr) * 1961-09-20 1962-08-10 Saunier Duval Dispositif détecteur de flamme à très faible inertie pour appareils à gaz et notamment pour chauffe-eau et chauffe-bains instantanés à gaz fonctionnant sans veilleuse permanente
US3204686A (en) * 1963-03-26 1965-09-07 Robertshaw Controls Co Combined manual and safety valve control
FR1356159A (fr) * 1963-05-07 1964-03-20 Landis & Gyr Sa Dispositif de mise en marche et de surveillance du débit de gaz d'un appareil de chauffage à gaz
FR1384389A (fr) * 1964-02-21 1965-01-04 Robertshaw Controls Co Dispositif de commande pour soupape de sûreté
FR1494853A (fr) * 1966-07-25 1967-09-15 Utilisation Ration Gaz Perfectionnements aux dispositifs de régulation thermostatique à actions combinées, notamment pour brûleurs à gaz
GB1344260A (en) * 1970-04-23 1974-01-16 United Gas Industries Ltd Flame-operated gas burner valve device

Also Published As

Publication number Publication date
ES285718U (es) 1986-03-01
DE3368116D1 (en) 1987-01-15
JPS5935717A (ja) 1984-02-27
US4518003A (en) 1985-05-21
FR2520486A1 (fr) 1983-07-29
EP0084992A1 (fr) 1983-08-03
ES285718Y (es) 1986-10-16
JPH0231288B2 (enrdf_load_stackoverflow) 1990-07-12
FR2520486B1 (enrdf_load_stackoverflow) 1984-03-16

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