EP0819890B1 - A device for controlling a gas burner - Google Patents

A device for controlling a gas burner Download PDF

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Publication number
EP0819890B1
EP0819890B1 EP96203715A EP96203715A EP0819890B1 EP 0819890 B1 EP0819890 B1 EP 0819890B1 EP 96203715 A EP96203715 A EP 96203715A EP 96203715 A EP96203715 A EP 96203715A EP 0819890 B1 EP0819890 B1 EP 0819890B1
Authority
EP
European Patent Office
Prior art keywords
unit
burner
connector
igniter
controlling
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
EP96203715A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0819890A1 (en
Inventor
Gianpiero Turrin
Stefano Fandella
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.)
Sit La Precisa SpA
Original Assignee
Sit La Precisa 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 Sit La Precisa SpA filed Critical Sit La Precisa SpA
Publication of EP0819890A1 publication Critical patent/EP0819890A1/en
Application granted granted Critical
Publication of EP0819890B1 publication Critical patent/EP0819890B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F23N5/26—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/08—Microprocessor; Microcomputer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/36—Spark ignition, e.g. by means of a high voltage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/14—Fuel valves electromagnetically operated

Definitions

  • the present invention relates to a device for controlling a gas burner according to the preamble of the appended claim 1.
  • devices of the type indicated are used for controlling the operation of burners such as, for example, those used in domestic heating appliances, in boilers, and the like. These devices permit remote electronic control and piloting of the burner functions, for example, of the ignition and flame-control operations, as well as cutting-off the gas-flow to the burner in the event of operating anomalies.
  • the circuit portion of the igniter unit which is arranged to generate the electrical discharge in order to ignite the flame is housed in the electronic control-circuit unit of the burner.
  • this solution has the advantage that it does not require any external electrical connection between the igniter unit and the control-circuit unit, it involves some disadvantages, amongst which is the fact that the electronic control circuit is subject to interference by radio emissions generated by the high voltage of the igniter unit, as well as to electromagnetic interference induced by the high-tension cable connecting the igniter unit and the electrode for igniting the burner. Moreover, since the electronic control circuit is normally in a position remote from the burner, the presence of fairly long high-tension connection cables accentuates the undesired effects of this interference.
  • the igniter unit is arranged outside the control circuit unit and is preferably mounted close to the burner. This solution reduces interference generated by the high voltage in the control circuit unit, but it requires a specific electrical connection between the circuit unit and the igniter unit.
  • the latter also has to have its own support and mechanical anchoring means, with consequent additional construction and assembly costs.
  • the problem upon which the present invention is based is that of providing a device for controlling gas burners which is designed structurally and functionally so as to overcome the problems complained of with reference to the prior art mentioned.
  • a device according to the present invention for the remote control of the operation of a gas burner 2 is generally indicated 1.
  • the burner 2 is connected to a supply line 3 for a gaseous fuel, for example, methane gas.
  • a gaseous fuel for example, methane gas.
  • the device 1 comprises a valve unit 4 including two solenoid valves 4a, 4b disposed in the gas supply line 3 to the burner 2, an igniter unit 5 arranged to transform a low-voltage signal into a pulsed high-voltage signal for generating a high-voltage electrical discharge in order to ignite the flame of the burner, and an electronic circuit unit 7 located in a position remote from the burner 2 and from the solenoid valves 4a, 4b and arranged for controlling and piloting the functions of the burner, particularly those provided for in the burner-ignition sequence and those for controlling the flame of the burner in operation.
  • circuit unit 7 will not be described in detail since it is not the subject of the present invention.
  • the solenoid valves 4a, 4b are electrically connected to the circuit unit 7 by means of a connector 8 including first and second connector elements 9, 10 releasably associated with one another.
  • the first connector element 9 is mounted on the valve unit 4, and the second element 10 is electrically connected to an end of a connection cable 11. The opposite end of the cable 11 is electrically connected to the circuit unit 7.
  • the cable 11 comprises five electrical wires indicated 12a-e.
  • the wires 12a, 12b are for the electrical connection between the circuit unit 7 and the solenoid valves 4a, 4b; the wire 12c is common to both solenoid valves.
  • the wire 12d is for earthing the circuit, and the wire 12e is for connecting the circuit unit 7 to the igniter unit 5 for the electrical supply thereof.
  • the igniter unit 5 comprises a circuit 13 in which a low-tension circuit portion 14, that is, a portion affected by the supply voltage (for example, 220 volts) and a high-tension circuit portion 15, that is, a portion affected by a pulsed voltage of the order of a few Kvolts, which is necessary for generating the electrical discharge used to ignite the burner can be identified.
  • a low-tension circuit portion 14 that is, a portion affected by the supply voltage (for example, 220 volts)
  • a high-tension circuit portion 15 that is, a portion affected by a pulsed voltage of the order of a few Kvolts, which is necessary for generating the electrical discharge used to ignite the burner can be identified.
  • the circuit portions 14, 15 of the igniter unit 5 are housed entirely in a casing 10a of the second element 10 of the connector 8.
  • the low-tension circuit portion 14 is supplied electrically by means of the wires 12c, 12e whereas the high-tension circuit portion 15 is connected, outside the connector 8, by means of a cable 16, to a igniter element 17 associated with the burner 2 and, for example, including two electrodes 17a, 17b between which the electrical discharge which starts combustion takes place.
  • the high-tension circuit portion 15 may be housed in the second element 10 of the connector 8 whilst the low-tension circuit portion 14 remains mounted on the circuit unit 7. It will be noted that, in both cases, the electrical wires 12d, 12e of the cable 11 are affected exclusively by the low-voltage supply of the device 1, for example, the voltage present in the domestic electrical mains.
  • FIG. 2 shows the circuit 13 of the igniter unit 5 schematically in the form of a block diagram.
  • the low-tension circuit portion 14 comprises a filter 18 for preventing the passage of currents having frequencies greater than a predetermined cut-off frequency.
  • the filter 18 is interposed electrically between the electrical supply mains R and an electrical charge storage device, for example, a capacitor 19 of an R/C circuit.
  • the capacitor 19 is connected electrically by means of a switch or trigger 20, to the primary circuit of a voltage step-up device or transformer 21.
  • the trigger 20 is opened so as to allow current to pass to the transformer 21 which raises its voltage.
  • Electrical resistances 22 are provided downstream of the secondary circuit of the transformer 21 as elements for damping electrical discharges generated by the circuit 13.
  • resistances 22 are connected by means of the high-tension cable 16 to the igniter element 17 associated with the burner 2.
  • the invention thus solves the problem set, achieving many advantages over known solutions.
  • one of the advantages of the device according to the present invention lies in the fact that, owing to the removal of the high-tension circuit portion of the ignition unit from the electronic control circuit, the latter is not subject to interference by radio emissions or to electromagnetic interference induced by the high voltage.
  • the housing of the whole of the circuit portion of the igniter unit in the connector does not require any additional connection cables between the igniter unit and the control circuit unit apart from those normally provided.
  • a further advantage lies in the fact that, since the entire circuit portion of the igniter unit is housed in the connector, no support or mechanical anchorage is required for it.
  • valve unit with which the connector is associated is normally arranged close to the burner, there is the advantage that fairly short cables are used for the connection between the high-tension circuit portion and the electrode igniter element of the burner, thus considerably limiting the above-mentioned undesired effects of the high voltage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
EP96203715A 1996-07-16 1996-12-24 A device for controlling a gas burner Expired - Lifetime EP0819890B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD960183 1996-07-16
IT96PD000183A IT1287947B1 (it) 1996-07-16 1996-07-16 Dispositivo di comando di un bruciatore a gas

Publications (2)

Publication Number Publication Date
EP0819890A1 EP0819890A1 (en) 1998-01-21
EP0819890B1 true EP0819890B1 (en) 2000-02-09

Family

ID=11391484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96203715A Expired - Lifetime EP0819890B1 (en) 1996-07-16 1996-12-24 A device for controlling a gas burner

Country Status (3)

Country Link
EP (1) EP0819890B1 (it)
DE (2) DE69606631D1 (it)
IT (1) IT1287947B1 (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1303090B1 (it) * 1998-07-28 2000-10-30 Miller Europe Spa Dispositivo accendigas elettronico integrato con una morsettiera.
IT1303088B1 (it) 1998-07-28 2000-10-30 Miller Europe Spa Dispositivo accendigas elettronico ad attacco rapido.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2178756B1 (it) * 1972-04-05 1974-08-02 Mecanique Ste B Urguigno
IT1131415B (it) * 1980-03-14 1986-06-25 Riello Ofr Perfezionamenti ai mezzi di blocco in dispositivi di accensione per bruciatori a combustibile liquido
DE4300309A1 (de) * 1993-01-08 1994-07-14 Staiger Steuerungstech Einrichtung für einen Gasbrenner oder dergleichen

Also Published As

Publication number Publication date
DE819890T1 (de) 1998-07-16
ITPD960183A1 (it) 1998-01-16
IT1287947B1 (it) 1998-08-26
DE69606631D1 (de) 2000-03-16
EP0819890A1 (en) 1998-01-21

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