EP0050678B1 - Dispositif électrique d'allumage et de contrôle pour brûleurs à gaz - Google Patents

Dispositif électrique d'allumage et de contrôle pour brûleurs à gaz Download PDF

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Publication number
EP0050678B1
EP0050678B1 EP19800106548 EP80106548A EP0050678B1 EP 0050678 B1 EP0050678 B1 EP 0050678B1 EP 19800106548 EP19800106548 EP 19800106548 EP 80106548 A EP80106548 A EP 80106548A EP 0050678 B1 EP0050678 B1 EP 0050678B1
Authority
EP
European Patent Office
Prior art keywords
ignition
burner
gas
valve
monitoring device
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
EP19800106548
Other languages
German (de)
English (en)
Other versions
EP0050678A1 (fr
Inventor
Franz Wonisch
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.)
Mayer & Wonisch (kg) Spezialfabrik fur Mess- und Regelgerate
Original Assignee
Mayer & Wonisch (kg) Spezialfabrik fur Mess- und Regelgerate
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 Mayer & Wonisch (kg) Spezialfabrik fur Mess- und Regelgerate filed Critical Mayer & Wonisch (kg) Spezialfabrik fur Mess- und Regelgerate
Priority to EP19800106548 priority Critical patent/EP0050678B1/fr
Priority to DE8080106548T priority patent/DE3069177D1/de
Publication of EP0050678A1 publication Critical patent/EP0050678A1/fr
Application granted granted Critical
Publication of EP0050678B1 publication Critical patent/EP0050678B1/fr
Expired legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q9/00—Pilot flame igniters
    • F23Q9/08—Pilot flame igniters with interlock with main fuel supply
    • F23Q9/12—Pilot flame igniters with interlock with main fuel supply to permit the supply to the main burner in dependence upon existence of pilot flame
    • F23Q9/14—Pilot flame igniters with interlock with main fuel supply to permit the supply to the main burner in dependence upon existence of pilot flame using electric means, e.g. by light-sensitive elements
    • 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 a device for gas-heated devices of any kind in order to be able to safely carry out and monitor the electrical ignition process and the function of such devices.
  • the facilities available for this purpose are burdened with the fact that the continuous operation of each thermoelectrically secured pilot or pilot flame requires approx. 200 m 3 gas per year. Until now, such costs could only be offset in the long term by using an equally complex ionization monitoring system. In addition, these fully network-dependent facilities can no longer be put into operation in the event of a power failure.
  • the object of the invention is to develop an electrical ignition and monitoring device for gas burners with or without a pilot flame which, in addition to existing devices, undertakes and monitors the ignition of the burning point with little effort and in a simple manner only when required , necessarily (intrinsically) confidently reacts to misfires and malfunctions, and also allows the gas burner to be operated by means of spark ignition even when de-energized.
  • the solution to this problem consists in the application to an electrical ignition and monitoring device for gas burners according to the preamble of claim 1 according to the invention that in the gas supply line of a burner a solenoid valve which is closed in the excited state is provided and which, when the safety valve is actuated, runs parallel to a delayed switching relay is fed via a control element from the AC network, the contact arrangement of the switching relay switching on the external power supply and preparing the high-voltage ignition.
  • the essential difference to the known devices of this type lies in the measure that the solenoid valve of the gas burner, which is downstream of the manually operated safety valve in the gas path and is functionally electrically connected via a special control element, has a closed design in the excited state.
  • a switching relay is also connected in parallel to this solenoid valve, the normally open contacts of which are in the circuits for the external power supply unit and for the high-voltage ignition device.
  • the use of the latter can only be prepared in that the full switch-on takes place only through the changeover contact of the control element when the burning point is to be put into operation.
  • thermoelectrically controlled safety valve Since the solenoid valve then becomes de-energized and opens, but the switching relay drops out with a delay, the external power supply of the thermoelectrically controlled safety valve is maintained in parallel with the spark formation at the gas burner until its supply is heated by the gas flame. Thermocouple is done. Otherwise the safety valve cuts off the entire gas supply and the ignition process must be repeated. If, in this arrangement, the gas burner is not ignited in an incorrectly functioning manner and at the same time the external power supply of the safety valve cannot be switched off due to a defect, this circuit can be interrupted by a special normally closed contact which is actuated by the solenoid valve in its open position and with a sufficient time delay. in order to reliably block the gas supply to the open burner even in the event of such a malfunction. In addition, due to the special design of the solenoid valve, if the AC power supply fails, it is possible to ignite the firing point while the safety valve is manually operated and to operate the device as long as the generated thermal current keeps the safety valve open.
  • the ignition and monitoring device according to the invention can also be applied to gas burners with a special ignition or pilot flame.
  • the above-described device interacts significantly with the solenoid valve of the pilot flame burner, which is open when de-energized, while the solenoid valve of the main burner, which functions as usual, is released via a further normally closed contact of the switching relay after it has dropped out due to the switchover of the control elements. It proves to be expedient to assign not only the ignition electrode but also the thermocouple of the safety valve to the pilot flame burner (dependent claim 3).
  • control element of the ignition and monitoring device consists of a changeover contact arrangement which is attached at a corresponding point within the gas appliance or in another monitoring area.
  • the control torque can be caused, for example, by hand, thermally by a bimetal sensor, hydraulically or pneumatically by a pressure sensor.
  • the differential pressure transmitter In order to classify the ignition and monitoring device according to the invention functionally in these devices, it is necessary for the differential pressure transmitter also to actuate the control element of the device, but to switch it over time see in any case must be done sooner than the gas valve in question is opened to ensure the immediate ignition of the gas then escaping.
  • Such a delay in the actuation sequence of the control element and gas valve can easily be implemented in terms of apparatus using common means, so that for the sake of clarity this does not need to be dealt with particularly here.
  • the gas burner B can be put into operation by actuating the thermoelectrically controlled safety valve TV.
  • the control element U whose changeover contact 2 is in series with the closing switch contact 1 of the safety valve TV, determines whether gas escapes and is ignited at the burning point. According to the shown rest position of the changeover contact 2, there should initially be no need for the ignition of the gas burner B for certain reasons. Accordingly, the solenoid valve HV is excited and closed via the contacts 1 and 2 from the AC network, so that no gas can escape from the burner B.
  • the switching relay VR connected in parallel with the valve HV has energized and switched on the external power supply unit FE with its normally open contact 3, which instead of missing thermal current from the firing point B, after having released the actuating handle, excites the safety valve TV and keeps it open.
  • the closing normally open contact 4 of the switching relay VR prepares the switching on of the high-voltage ignition device ZG.
  • the changeover contact 2 of the control element U e.g. due to thermal actuation by a bimetallic spring strip or indirectly caused by a control relay SR (remote) switched in an appropriate manner via contact 5, switched to its working position
  • the ignition device ZG is switched on and the electromagnetic valve HV is de-energized, which then releases the burner B escaping gas is ignited immediately.
  • the switching relay VR in the same circuit drops with a certain delay, the external power supply unit FE and the ignition device ZG are only switched off via the contacts 3 and 4 when the gas burner B burns and its thermocouple has taken over the power supply of the safety valve TV. Otherwise, i.e.
  • this valve TV cuts off the entire gas supply so that the process must be repeated and re-ignited. If the alternating current fails, there is then the possibility of manually igniting the gas flowing out of the burner B over the duration of the actuation of the safety valve TV through the now open electromagnetic valve HV until the latter supplies the required thermal current for the safety valve TV to keep it open.
  • the switching elements of the ignition and monitoring device according to the invention interact with the solenoid valve PV of the pilot flame burner P which is closed in the excited state.
  • the switching relay VR there is a further normally closed contact 6, which allows the normally operating solenoid valve HV of the longitudinal burner B to close in the ignition phase and only responds and opens after the delayed release of the switching relay VR. Accordingly, the ignition electrode and the thermocouple are assigned to the pilot flame burner P in this device, so that the function of the entire gas device is secured and monitored in the manner described above.
  • FIG. 3 of the drawing differs from the gas device shown in FIG. 1 in structure and function essentially in that, instead of the electromagnetic valve (HV) for the gas burner B, a mechanically operated valve BV is used, which has a common differential pressure sensor DG is coupled.
  • This fitting reacts, for example, to the pressure change that occurs when hot water is drawn, and evaluates it for opening (and closing) the gas valve BV.
  • the control element U provided according to the invention respond to the water withdrawal, it is necessary to do the same to couple mechanically with this differential pressure transmitter DG.
  • the actuation process in question must first act on the control element U and then (afterwards) on the gas valve BV.
  • the ignition and monitoring processes all proceed as in an arrangement according to FIG. 1 of the drawing.
  • a gas device is shown in Fig. 4 of the drawing, in which the solenoid valve (HV) of the longitudinal burner B operated by an ignition-protected pilot flame burner P according to Fig. 2, as described above, has also been replaced by a differential pressure-controlled normal valve BV.
  • HV solenoid valve
  • BV differential pressure-controlled normal valve
  • the electromagnetic valve PV of the pilot flame burner P is first excited from the AC network via the switch-on contact 1 and the switchover contact 2 of the control element U and the burner P is closed. Furthermore, the switching relay VR which is connected to voltage in parallel with its normally open contact 3 switches on the external power supply unit FE, which initially keeps the safety valve TV open due to the lack of thermal current through the burning pilot flame P. If the differential pressure transmitter DG now responds as a result of the removal of process water, this first actuates the changeover contact 2 of the control element U mechanically coupled to it.
  • This process switches on the ignition device ZG prepared with the switching relay contact 4 and opens the solenoid valve PV which is switched off at the same time, so that the ignited pilot flame burner P begins to burn and supplies thermal current to the safety valve TV, while the drop-out switching relay VR leaves the external power supply (3 / FE) and the ignition (4 / ZG) switched on for a short time. Only after the control element U has been switched over does the differential pressure transmitter DG mechanically open the gas valve BV of the longitudinal burner B, the outflowing gas being ignited by means of the pilot flame P and / or via the high-voltage ignition by an auxiliary spark gap also provided for the burner B for safety reasons.
  • the switching relay VR decelerates to a delay and, by opening its work contacts 3 and 4, puts the external power supply unit FE and the ignition device ZG out of operation. If, for example, due to a defect, the external power supply FE is not switched off or interrupted and the safety valve TV consequently remains open in an unfunctional manner, i.e. gas can flow out at the combustion point without ignition, a mechanically coupled normally closed contact arrangement is provided as an additional safeguard with the solenoid valve PV of the pilot flame burner P, or in the case of individual burners B with their gas valve HV. It is opened by the valve with a delay when the open position is reached and accordingly, after a short test time, also disconnects the external circuit on the primary or secondary side. This measure, which is only indicated here in FIG. 4, can of course also be used in the devices according to FIGS. 1 to 3 of the drawing without further instructions.
  • the mutual safeguarding of the device according to the invention automatically causes an immediate interruption of the entire gas supply without, however, the Exclude the possibility of still being able to start up the gas appliances in question in the event of a power failure using spark ignition.

Claims (8)

1. Unité d'amorçage et de contrôle pour brûleurs à gaz avec ou sans flamme pilote ainsi qu'avec un soupape de sûreté à commande manuelle et contrôle thermo-électrique alimenté temporairement de courant étranger durant le processus d'amorçage à haute tension, caractérisée en ce qu'une électrovanne (HV) fermée durant la phase d'excitation est prévue dans le feeder de gaz d'un brûleur (B), l'électrovanne étant alimentée du réseau à courant alternatif par une unité de contrôle (U) en parallèle à un relais de commutation à relâchement retardé (VR) lors de la commande du soupape de sûreté et en ce que la disposition des contacts (3, 4) du relais de commutation (VR) enclenche l'alimentation en courant étranger (FE) et prépare l'amorçage à haute tension (ZG) (fig. 1).
2. Unité d'amorçage et de contrôle pour brûleurs à gaz avec flamme pilote selon la revendication 1, caractérisée en ce que le relais de commutation à relâchement retardé (VR) et branchée en parallèle à l'électrovanne (PV) du brûleur à flamme pilote (P) qui est fermée durant la phase d'excitation et en ce que le relais de commutation contrôle l'électrovanne (HV) du brûleur principal (B) par l'intermédiaire d'un contact de repos supplémentaire (6) (fig. 2).
3. Unité d'amorçage et de contrôle selon la revendication 2, caractérisée en ce que le thermo-élement du soupape de sûreté (TV) et l'électrode d'amorçage à haute tension (ZG) sont attribués au brûleur à flamme pilote (P).
4. Unité d'amorçage et de contrôle selon une des revendications 1 ou 2, caractérisée en ce que l'unité de commande (U) se compose d'une disposition de contacts de commutation prévue à un endroit approprié, cette disposition étant actionnée, selon la fonction, p. ex. manuellement, de façon thermomécani- que, hydraulique, pneumatique ou électrique par l'intermédiaire d'un relais pilote (SR) (télé-)commandé de façon correspondante.
5. Unité d'amorçage et de contrôle-pour brûleurs à gaz sans flamme pilote selon la revendication 1 ou 4, caractérisée en ce qu'une vanne à gaz (BV) prévue au lieu de l'électrovanne (HV) est actionnée à retard mécanique par l'intermédiaire p. ex. d'un capteur de pression differentielle (DG) commandé par le passage d'eau, le capteur agissant immédiatement avant sur la disposition des contacts de commutation (2) de l'unité de commande (U) couplé à capteur (fig. 3).
6. Unité d'amorçage et de contrôle pour brûleurs à gaz avec flamme pilote selon une des revendications 1 à 4, caractérisée en ce que d'abord la disposition des contacts de commutation (2) de l'unité de commande (U) et immédiatement après la vanne à gaz normale (BV) du brûleur principal (B) sont actionnées mécaniquement par l'intermédiaire par exemple d'un capteur de pression differentielle (DG) commandé par le passage d'eau (fig. 4).
7. Unité d'amorçage et de contrôle selon les revendications 1 ou 5, caractérisée en ce qu'un contact de repos répondant à action retardée dans la position ouverte est attribué à l'électrovanne (HV) ou à la vanne à gaz (BV) d'un brûleur, ce contact ayant la fonction de couper (en plus) l'alimentation en courant étranger (FE) du soupape de sûreté (TV).
8. Unité d'amorçage et de contrôle selon la revendication 6, caractérisée en ce qu'une électrode d'amorçage particulière est attribuée à connexion en parallèle au brûleur à flamme pilote (P) et au brûleur principal (B) actionné par l'intermédiaire du capteur de pression différentielle (DG).
EP19800106548 1980-10-25 1980-10-25 Dispositif électrique d'allumage et de contrôle pour brûleurs à gaz Expired EP0050678B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19800106548 EP0050678B1 (fr) 1980-10-25 1980-10-25 Dispositif électrique d'allumage et de contrôle pour brûleurs à gaz
DE8080106548T DE3069177D1 (en) 1980-10-25 1980-10-25 Electrical ignition and controlling apparatus for gas burners

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19800106548 EP0050678B1 (fr) 1980-10-25 1980-10-25 Dispositif électrique d'allumage et de contrôle pour brûleurs à gaz

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EP0050678A1 EP0050678A1 (fr) 1982-05-05
EP0050678B1 true EP0050678B1 (fr) 1984-09-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3515464A1 (de) * 1984-11-21 1986-05-28 Rinnai K.K., Nagoya, Aichi Betriebssteuereinrichtung in einer brennapparatur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071614B1 (fr) * 1981-02-14 1985-11-27 Joh. Vaillant GmbH u. Co. Agencement thermoelectrique de securite d'allumage
CN108072057A (zh) * 2017-12-07 2018-05-25 成都前锋电子有限责任公司 一种外接电源的家用燃气灶

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366518A1 (fr) * 1976-09-30 1978-04-28 Sirand Joseph Systeme de reallumage automatique et de modulation de regime de radiateurs a gaz

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3515464A1 (de) * 1984-11-21 1986-05-28 Rinnai K.K., Nagoya, Aichi Betriebssteuereinrichtung in einer brennapparatur

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EP0050678A1 (fr) 1982-05-05
DE3069177D1 (en) 1984-10-18

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