EP0454613B1 - Gas appliance - Google Patents

Gas appliance Download PDF

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Publication number
EP0454613B1
EP0454613B1 EP91500040A EP91500040A EP0454613B1 EP 0454613 B1 EP0454613 B1 EP 0454613B1 EP 91500040 A EP91500040 A EP 91500040A EP 91500040 A EP91500040 A EP 91500040A EP 0454613 B1 EP0454613 B1 EP 0454613B1
Authority
EP
European Patent Office
Prior art keywords
burner
auxiliary
safety valve
current
gas appliance
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
EP91500040A
Other languages
German (de)
French (fr)
Other versions
EP0454613A1 (en
Inventor
Francisco Bertomeu Martinez
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.)
Individual
Original Assignee
Individual
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8267108&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0454613(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of EP0454613A1 publication Critical patent/EP0454613A1/en
Application granted granted Critical
Publication of EP0454613B1 publication Critical patent/EP0454613B1/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
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • F23N5/123—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electronic means
    • 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
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F23N5/102—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/10—Arrangement or mounting of ignition devices
    • F24C3/103—Arrangement or mounting of ignition devices of electric ignition devices
    • 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
    • F23N2231/00—Fail safe
    • F23N2231/02—Fail safe using electric energy accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/04—Fail safe for electrical power failures
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/02—Controlling two or more burners
    • 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

Definitions

  • This invention deals with a gas appliance according to the preamble of claim 1.
  • thermoelectric type a thermocouple that uses electrical energy to generate electrical energy to the heating of a thermocouple, either by the flame of a pilot light, or by the bumer itself.
  • the electrical energy generated flows through the coil of an electromagnetic assembly, and this action makes it possible for safety valve to remain open, allowing for the flow of the gas to the burner it controls.
  • the valve controlling the flow of the gas closes.
  • the magnetic force of attraction should only be slightly greater than the force of the tension caused by the spring of the safety valve; this level of force is achieved with very low consumption of electricity.
  • Japanese publication JP-A-226525 shows how to ensure ignition by burner, prevent the releasing of unburnt gas and to contrive safety, by incorporating a timer circuit continued igniting operation for a predetermined period of time necessary for the ignition of a burner even when the igniting operation is instantaneous, into an igniting circuit.
  • a flame detecting circuit When a burner is ignited instantaneously by the spark of an igniting circuit, a flame detecting circuit is operated to supply the voltage of a battery to the coil of a solenoid safety valve through a transistor and hold the safety valve in the given time valve opering condition of a first timer circuit while a solenoid safety valve is held in the valve opening condition by the conduction of the coil affected by a predetermined electromotive force from a thermocouple heated by the burner, whereby the combustion of the burner is continued.
  • a fuel burner is operatively connected to a burner primary control means and operates in response to the condition of a controller.
  • the burner primary control means is of a type that includes a direct current power supply means to supply all of the necessary operating power for its amplifiers and control relays.
  • Connected to the burner primary control means is a power storage means that obtains direct current power from the direct current power supply means of the burner primary control means and which stores this power over a period of time. In the event of a momentary power loss to the burner primary control means, the power storage means feeds direct current power back to the primary control means keeping it energized for a short interval.
  • JP-A-63306311 we know how to surely keep safety and enable positive combustion in a combustion device such as hot water heater by a method wherein a fuel valve is kept open during a desired auxiliary time after ignition and this auxiliary time is extended by desired time when ignition of a burner is confirmed.
  • First and second fuel valves are opened under a pushing operation of a hot water feeding member to its deepest position and then a pilot light burner is ignited.
  • an initial opening valve holding circuit of a control circuit may output an auxiliary time until the opened valve of a first fuel valve can be kept with an electromotive force of a first thermocouple heated by a pilot burner so as to assure the opened valve of the fuel valve. If the ignition is confirmed with a flame rod within this auxiliary time, a forced valve opening holding electrical power is supplied, for a desired time. With this arrangement it is possible to make a positive ignition while keeping safety characteristics.
  • German patent no. 1946588 we know of a security means for the electric ignition of domestic apparatus which are heated by gas through an electromagnetic valve which controls the gas feed to the point of its combustion, the winding of the electromagnetic valve being in the manner of a transformer for the igniting means, a timer being connected in the primary circuit of the current of the magnetic valve for gas, which can be connected (jumped) thermoelectrically, and in that the spark igniting means can be control through high tension, located en the valve secondary circuit, through a flame controller by ionization, already known.
  • the invention covers a gas appliance with the features detailed in claim 1.
  • the dependent claims deal with further embodiments of the gas appliance according to claim 1.
  • the device (1) consists of a printed circuit (2) which includes a set of pushbuttons (3) by means of which the valves controlling the flow of gas to the burner (not shown for the appliance for household use), are activated.
  • the circuit is equipped with a selector (5), so that by means of a trigger (6), a single valve may be selected for use with the corresponding supply.
  • the supply source (8) can be used with a storage cell, and can also be connected to the circuit by an isolation transformer (9).
  • Both the isolation transformer and the thermocouples (4) together with the spark lighter (7), are controlled by means of timers (10), and in both cases operate on transistors (11).

Description

  • This invention deals with a gas appliance according to the preamble of claim 1.
  • Certain safety valves based on flame control are already familiar. These valves are used in household appliances running on gaseous fuel, are of the thermoelectric type, and utilize electrical energy generated by the heating of a thermocouple, either by the flame of a pilot light, or by the bumer itself.
  • The electrical energy generated flows through the coil of an electromagnetic assembly, and this action makes it possible for safety valve to remain open, allowing for the flow of the gas to the burner it controls. The absence of a flame and the outflow of gas that is not burned, make it impossible for the thermocouple to remain hot, and therefore no electrical energy allowing for the activacion of the electromagnet is produced. As a result, the valve controlling the flow of the gas closes.
  • It must be kept in mind that the electromagnetic system does not generate sufficient energy to attract the safety valve on the assembly. It produces only enough energy to keep the valve closed, which therefore must be activated manually to overcome the force of the built-in spring. This spring is activated, shutting off the gas, when the temperature is not high enough to obtain the thermoelectric energy necessary to maintain the safety valve open.
  • In reality, the magnetic force of attraction should only be slightly greater than the force of the tension caused by the spring of the safety valve; this level of force is achieved with very low consumption of electricity.
  • Japanese publication JP-A-226525 shows how to ensure ignition by burner, prevent the releasing of unburnt gas and to contrive safety, by incorporating a timer circuit continued igniting operation for a predetermined period of time necessary for the ignition of a burner even when the igniting operation is instantaneous, into an igniting circuit.
  • When a burner is ignited instantaneously by the spark of an igniting circuit, a flame detecting circuit is operated to supply the voltage of a battery to the coil of a solenoid safety valve through a transistor and hold the safety valve in the given time valve opering condition of a first timer circuit while a solenoid safety valve is held in the valve opening condition by the conduction of the coil affected by a predetermined electromotive force from a thermocouple heated by the burner, whereby the combustion of the burner is continued. When the burner is not ignited instantaneously by the spark of the ignited circuit, a flame rod does not carry current, and a flame detecting circuit is not operated, whereby the voltage of the battery is not supplied to the coil, the solenoid safety valve is closed quickly and the burner may be maintained in the condition of shut-off.
  • Through U.S.A. patent no. 3 544 247 we know that a fuel burner is operatively connected to a burner primary control means and operates in response to the condition of a controller. The burner primary control means is of a type that includes a direct current power supply means to supply all of the necessary operating power for its amplifiers and control relays. Connected to the burner primary control means is a power storage means that obtains direct current power from the direct current power supply means of the burner primary control means and which stores this power over a period of time. In the event of a momentary power loss to the burner primary control means, the power storage means feeds direct current power back to the primary control means keeping it energized for a short interval.
  • Through Japanese publication no. JP-A-63306311 we know how to surely keep safety and enable positive combustion in a combustion device such as hot water heater by a method wherein a fuel valve is kept open during a desired auxiliary time after ignition and this auxiliary time is extended by desired time when ignition of a burner is confirmed.
  • First and second fuel valves are opened under a pushing operation of a hot water feeding member to its deepest position and then a pilot light burner is ignited. At this time, an initial opening valve holding circuit of a control circuit may output an auxiliary time until the opened valve of a first fuel valve can be kept with an electromotive force of a first thermocouple heated by a pilot burner so as to assure the opened valve of the fuel valve. If the ignition is confirmed with a flame rod within this auxiliary time, a forced valve opening holding electrical power is supplied, for a desired time. With this arrangement it is possible to make a positive ignition while keeping safety characteristics.
  • Finally, from German patent no. 1946588 we know of a security means for the electric ignition of domestic apparatus which are heated by gas through an electromagnetic valve which controls the gas feed to the point of its combustion, the winding of the electromagnetic valve being in the manner of a transformer for the igniting means, a timer being connected in the primary circuit of the current of the magnetic valve for gas, which can be connected (jumped) thermoelectrically, and in that the spark igniting means can be control through high tension, located en the valve secondary circuit, through a flame controller by ionization, already known.
  • The invention covers a gas appliance with the features detailed in claim 1. The dependent claims deal with further embodiments of the gas appliance according to claim 1.
  • To allow for easier understanding, not only of the construction, but also of the correct use of the instant lighting device of the invention, a practical example of operation is provided below, just as is shown in the corresponding schematic diagram. This explanation is merely illustrative and operation is not in any way restricted to the example given.
  • The device (1) consists of a printed circuit (2) which includes a set of pushbuttons (3) by means of which the valves controlling the flow of gas to the burner (not shown for the appliance for household use), are activated.
  • When the device has more than one valve, or likewise, more than one burner, and as a result has various thermocouples (4), the circuit is equipped with a selector (5), so that by means of a trigger (6), a single valve may be selected for use with the corresponding supply.
  • One the pushbutton (3) is pressed, the burner is lit by means of a spark lighter (7), and the supply of an auxiliary current is provided to the magnetic group of the valve.
  • The supply source (8) can be used with a storage cell, and can also be connected to the circuit by an isolation transformer (9).
  • Both the isolation transformer and the thermocouples (4) together with the spark lighter (7), are controlled by means of timers (10), and in both cases operate on transistors (11).

Claims (4)

  1. A gas appliance having an instant lighting device (1) with a spark lighter (7), comprising at least one burner, with at least one corresponding magnetic group of safety valves and thermocouples (4) to be heated by the flames of the burner(s) in order to allow gas to be fed to the burner(s) when heated, an electric supply source (8) with storage cell for supplying auxiliary electric current to the instant lighting device (1) and the magnetic group of safety valve(s), an isolation transformer for suppling electric current to the electric supply source (8), characterized by a printed electric circuit (2) with outlets and a timer (10) for feeding and timing the spark lighter (7) and the auxiliary current to the magnetic group of safety valve(s) and to the thermocouples (4), the said auxiliary current to be replaced by the electrical current generated by them once heated by the flame, by a trigger (6) and a selector (5) for controlling the instant lighting device (1) in order to enable where necessary the supply of gas only to one safety valve at the time so as to prevent the possibility of activating more safety valves at the same time and by the fact that the safety valve shuts off when the corresponding thermocouple cools at a temperature which corresponds to a one third energy reduction of the generated electric current.
  2. A gas appliance according to claim 1, characterized in that the timer (10) allows the supply of electric current such that the duration of the auxiliary current is greater than that of the functioning of the spark lighter (7).
  3. A gas appliance according to claim 1, characterized in that the lighting device (1) comprises a pushbutton (3) for enabling the supply of electric current to the device (3) and in that upon pressing the pushbutton (3) for supplying electrical energy to the lighting system the existance of a flame is detected through ionization, the spark lighter stops functioning and, at the same time, the timer (10), which gives auxiliary electricity to the thermocouple continues functioning during approximately 6 seconds more.
  4. A gas appliance according to claim 3, characterized in that once the thermocouple (4) is heated, if the pushbutton (3) is pressed, the printed electrical circuit (2) is not in use and does not consume energy.
EP91500040A 1990-04-27 1991-04-26 Gas appliance Expired - Lifetime EP0454613B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES9001218A ES2021531A6 (en) 1990-04-27 1990-04-27 Improvements on instant lighting devices in built-in safety valves used in gas appliances.
ES9001218 1990-04-27

Publications (2)

Publication Number Publication Date
EP0454613A1 EP0454613A1 (en) 1991-10-30
EP0454613B1 true EP0454613B1 (en) 1995-06-28

Family

ID=8267108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91500040A Expired - Lifetime EP0454613B1 (en) 1990-04-27 1991-04-26 Gas appliance

Country Status (5)

Country Link
EP (1) EP0454613B1 (en)
DE (1) DE69110746T2 (en)
DK (1) DK0454613T3 (en)
ES (1) ES2021531A6 (en)
PT (1) PT97506A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2721097A1 (en) * 1994-06-10 1995-12-15 Cepem Safety device for gas combustion equipment
US5425631A (en) * 1994-08-11 1995-06-20 Eaton Corporation Controlling a gaseous fuel burner and control valve therefor
FR2761459B1 (en) * 1997-03-28 1999-06-18 Gaz De France SAFETY SYSTEM FOR BAKING APPLIANCE BURNERS
US11098898B2 (en) * 2018-09-28 2021-08-24 Emerson Electric Co. Automatic pilot lighting systems

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3544247A (en) * 1968-11-25 1970-12-01 Honeywell Inc Fuel burner power failure bridge
DE1946588B2 (en) * 1969-09-15 1971-01-07 Mayer & Wonisch Electric fuse for gas-heated household appliances or the like.

Also Published As

Publication number Publication date
DK0454613T3 (en) 1995-11-13
EP0454613A1 (en) 1991-10-30
PT97506A (en) 1993-05-31
DE69110746T2 (en) 1996-02-08
DE69110746D1 (en) 1995-08-03
ES2021531A6 (en) 1991-11-01

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