EP0240390B1 - Gasbrennersicherheitsvorrichtung vom mechanisch kontrollierbaren Belüftungstyp - Google Patents

Gasbrennersicherheitsvorrichtung vom mechanisch kontrollierbaren Belüftungstyp Download PDF

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Publication number
EP0240390B1
EP0240390B1 EP87400485A EP87400485A EP0240390B1 EP 0240390 B1 EP0240390 B1 EP 0240390B1 EP 87400485 A EP87400485 A EP 87400485A EP 87400485 A EP87400485 A EP 87400485A EP 0240390 B1 EP0240390 B1 EP 0240390B1
Authority
EP
European Patent Office
Prior art keywords
boiler
circuit
mechanical ventilation
temperature
burner
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
EP87400485A
Other languages
English (en)
French (fr)
Other versions
EP0240390A1 (de
Inventor
Lionel Mollard
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 EP0240390A1 publication Critical patent/EP0240390A1/de
Application granted granted Critical
Publication of EP0240390B1 publication Critical patent/EP0240390B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means

Definitions

  • the invention relates to gas boilers of the type with controlled mechanical ventilation and relates to a safety device capable of causing the appliance to stop in the event of an anomaly in the operation of this ventilation.
  • thermosensitive element causes the gas to stop at the burner is adjusted between the temperature value accepted when the appliance operates under normal draft conditions and a temperature value for which there would be a dangerous discharge of the products. combustion.
  • This predetermined temperature value in the case of fixed power devices, allows the device to be shut down practically immediately as soon as a mechanical ventilation anomaly occurs.
  • variable-power appliances in which the burner can operate at reduced flow rate, at maximum flow rate or at intermediate flow rates
  • the fixed trigger value of the heat-sensitive element is a drawback, because the lower temperature of the products combustion, when the burner operates at low flow rate, will not allow this value to be reached quickly, and will consequently delay the device's safety.
  • the Applicant has already, according to FR-A 254 994, imagined using a heat-sensitive system, the set values of which follow the power values of the burner.
  • a sensor with two setpoints or with a variable setpoint between predetermined limits, which would be associated with a microprocessor having in memory the setpoint indications of said sensor, this microprocessor being able consequently to cause the setting in safety of the appliance as a function of the signals received both from the sensor, according to the detected discharge, and from the burner with regard to the heating power at the instant considered.
  • the invention provides a solution to this problem because it allows, using a single thermal contactor disposed at the draft stop of the device, to ensure its safety in the event of an operating anomaly of controlled mechanical ventilation, regardless of the power developed by the boiler between a minimum power value and a maximum power value.
  • a preheating system of a thermal contactor is used arranged at the draft stop of the apparatus, using a small heating resistor which is put into operation when the temperature water in the boiler return circuit, corresponding to a low operating power, is lower than a predetermined temperature.
  • the small heating resistor is mounted in a circuit which is closed in response to the information supplied by an aquastat, the temperature probe of which is fixed on this return pipe to the boiler, which circuit receives this information via a relay.
  • the mixed boiler shown capable of supplying hot water to a heating circuit or of producing sanitary water comprises an enclosure 1 at the lower part of which are arranged the mechanisms and organs and control and of operation and of which the part upper ends with a hood 2 for exhausting the burnt gases.
  • a fin block 3 which constitutes the heating body of the apparatus and which receives the hot combustion gases emitted by a burner 5 and channeled inside a skirt 4.
  • a gas inlet pipe 7 leads to an inlet solenoid valve 6 via a circuit breaker box 8, which also ensures that the boiler is powered up.
  • This circuit breaker box 8 allows the security of the device to be armed at the same time as it authorizes the passage of gas to the solenoid valve 6. This half, when its electromagnet 9 for operating is energized, frees the passage gas through the pipe 10 towards the burner 5.
  • the water circuit includes a reversing valve 14, the closure member not shown of which distributes the primary hot water leaving the exchanger by the conduit 15, that is to a pipe 11 for the departure of hot water towards the radiators (heating circuit ), or to a short circuit 13 which recycles this hot water directly to the heating body by a section of conduit 16, common to this short circuit and to the return of water from the heating circuit by the return pipe 12.
  • This short circuit (13, 16) allows rapid heating of domestic water circulating in a coil 18 which supplies water to a pipe 17 for drawing off water, and which is supplied by a cold water inlet tube 19.
  • a circulation pump 20 is interposed on the common section 16.
  • the temperature of the water returning to the heating body 3 is measured by an aquastat 21 of which the probe 22 is fixed to the common section of conduit 16.
  • a thermal switch 24 is directly connected to the circuit breaker box 8 by the link at the top of the appliance.
  • a small resistance is mounted opposite and close to this sensor.
  • heater 25 integrated into an electrical circuit 29 supplied with current from a control unit 27 itself associated with the circuit breaker unit 8.
  • the circuit 29 receives directly from the aquastat 21, via a relay 28 a information on the return temperature of the water to the exchanger and therefore information on the operation of the boiler, which leads to the opening or closing of the circuit 29.
  • This device applies to devices with controlled mechanical ventilation, for example traditional boilers but also so-called “condensing” boilers.

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  • 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)
  • Control Of Combustion (AREA)

Claims (1)

  1. Sicherheitsvorrichtung für Gasbrenner mit mechanisch kontrollierter Belüftung mit einem Elektroventil (6) für die Zufuhr von Gas zu einem Brenner (5), der mit einem Schaltkasten (8) verbunden ist, und mit einem Umschaltventil (14), welches das primäre Warmwasser verteilt, das von einem Heizkörper über einen Heizkreis oder über eine kurze Leitung zur Bereitung von Brauchwasser kommt, welche einen Temperaturregler (21), dessen Meßfühler (22) an der Wasserrücklaufleitung befestigt ist, und ebenso einen auf der Höhe des Zugbegrenzers (23) des Brenners angeordneten Thermoarbeitskontakt (24) aufweist, der auf ein nicht normales Ansteigen der Temperatur in der Art einer Sicherheitsvorrichtung und durch Ausschalten des Brenners reagiert, dadurch gekennzeichnet, daß der Thermoarbeitskontakt (24) mit einem kleinen Heizwiderstand (25) verbunden ist, der sich einschaltet, wenn der Brenner eine Information auf geringe Leistung erhält, wobei dieser Heizwiderstand in einem Schaltkreis (29) angeordnet ist, der als Antwort auf durch den Temperaturregler (21), dessen Sonde an der Rücklaufleitung (16) zum Brenner befestigt ist, gelieferte Informationen geschlossen wird.
EP87400485A 1986-03-28 1987-03-05 Gasbrennersicherheitsvorrichtung vom mechanisch kontrollierbaren Belüftungstyp Expired - Lifetime EP0240390B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8604533 1986-03-28
FR8604533A FR2596501B1 (fr) 1986-03-28 1986-03-28 Dispositif de securite pour chaudiere a gaz du type a ventilation mecanique controlee

Publications (2)

Publication Number Publication Date
EP0240390A1 EP0240390A1 (de) 1987-10-07
EP0240390B1 true EP0240390B1 (de) 1990-09-19

Family

ID=9333690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87400485A Expired - Lifetime EP0240390B1 (de) 1986-03-28 1987-03-05 Gasbrennersicherheitsvorrichtung vom mechanisch kontrollierbaren Belüftungstyp

Country Status (4)

Country Link
EP (1) EP0240390B1 (de)
DE (1) DE3764988D1 (de)
ES (1) ES2017726B3 (de)
FR (1) FR2596501B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT401569B (de) * 1991-12-12 1996-10-25 Vaillant Gmbh Heizeinrichtung
FR2726071B1 (fr) * 1994-10-20 1996-12-27 Sdecc Procede de mise en securite de chauffe-bains et chaudieres atmospheriques a gaz lors du refoulement des produits de combustion

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1876636A (en) * 1929-09-26 1932-09-13 Pioneer Heat Regulator Corp Temperature regulating system
GB1202774A (en) * 1968-01-18 1970-08-19 Potterton Internat Ltd Thermostatic control means for gas-fired fluid heating apparatus
DE2625420C2 (de) * 1976-06-05 1981-08-27 Danfoss A/S, 6430 Nordborg Thermostat-Aufsatz für ein Heizkörperventil
FR2420729A2 (fr) * 1978-03-22 1979-10-19 Dev Thermique Ste Fse Perfectionnements apportes aux installations de chauffage electriques
GB2034469A (en) * 1978-11-07 1980-06-04 Ranco Inc Thermostatic control
FR2549941B1 (fr) * 1983-07-29 1985-09-20 Sdecc Dispositif de securite pour appareil a gaz de chauffage et de production d'eau chaude a ventilation mecanique controlee
DE3527706A1 (de) * 1984-08-15 1986-02-27 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Verfahren zum ermitteln eines abschaltkriteriums eines gasbeheizten geraetes und schaltung zur durchfuehrung des verfahrens

Also Published As

Publication number Publication date
FR2596501B1 (fr) 1990-04-27
FR2596501A1 (fr) 1987-10-02
ES2017726B3 (es) 1991-03-01
EP0240390A1 (de) 1987-10-07
DE3764988D1 (de) 1990-10-25

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