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EP0315055A1 - Méthode pour vérifier une soupape à gaz et dispositif de réalisation de la méthode - Google Patents

Méthode pour vérifier une soupape à gaz et dispositif de réalisation de la méthode Download PDF

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Publication number
EP0315055A1
EP0315055A1 EP88117908A EP88117908A EP0315055A1 EP 0315055 A1 EP0315055 A1 EP 0315055A1 EP 88117908 A EP88117908 A EP 88117908A EP 88117908 A EP88117908 A EP 88117908A EP 0315055 A1 EP0315055 A1 EP 0315055A1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel
counter
line
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.)
Granted
Application number
EP88117908A
Other languages
German (de)
English (en)
Other versions
EP0315055B1 (fr
Inventor
Reiner Kind
Dietmar Manz
Ulrich Ortlinghaus
Franz-Josef Wertenbruch
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.)
Nv Vaillant Sa
VAILLANT B.V.
Vaillant Austria GmbH
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
Original Assignee
Vaillant Austria GmbH
Nv Vaillant Sa
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
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 Vaillant Austria GmbH, Nv Vaillant Sa, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd filed Critical Vaillant Austria GmbH
Priority to AT88117908T priority Critical patent/ATE99402T1/de
Publication of EP0315055A1 publication Critical patent/EP0315055A1/fr
Application granted granted Critical
Publication of EP0315055B1 publication Critical patent/EP0315055B1/fr
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
    • F23N5/20—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
    • 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
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • 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
    • F23N2227/12—Burner simulation or checking
    • F23N2227/16—Checking components, e.g. electronic
    • 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
    • F23N2231/10—Fail safe for component failures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/18—Detecting fluid leaks
    • 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
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/20—Membrane valves
    • 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

Definitions

  • the present invention relates to a method for checking the closing of a fuel valve and to devices for carrying out the method according to the preambles of the independent claims.
  • Oil-fired as well as gas-fired instantaneous water heaters, circulating water heaters with and without process water heating, as well as boilers and space heaters can be regarded as fuel-heated devices. It does not matter whether these devices have an electronic or a thermoelectric flame monitoring device, if it is only possible to monitor the flame of the main burner.
  • valves of such devices usually work without problems for relatively long times. Occasionally it can Occasionally, for example due to dirt or excessive wear, that a fuel valve gets stuck.
  • the controller that controls the fuel-heated device gives a shutdown command, but this is not carried out.
  • the burner will continue to burn until the safety thermostat, which complies with the regulations, interlocks the device.
  • the present invention has for its object to regularly test at least one of the existing valves of the fuel-heated device either before the fuel-heated device starts operating or when the fuel-heated device is switched off.
  • a gas-heated circulating water heater 1 has a heat exchanger 2 and a burner 3 heating it, which is fed from a gas supply line 6 which is controlled by a first gas valve 4 to be monitored and a second gas valve 5 which is not to be monitored.
  • the heat exchanger 2 is connected to a return line 8 provided with a circulation pump 7 and to a flow line 10 provided with a temperature sensor 9.
  • a central control, regulating and monitoring unit 11 is provided which, together with an alternatively provided switch-off monitoring device 12 or switch-on monitoring device 13, is designed as a microcomputer control. Both the switch-off monitoring device 12 and the switch-on monitoring device 13 can also be present.
  • the burner 3 is assigned an ignition electrode 14, which is fed by an ignition device 15 via a line 16, the ignition device 15 receiving its activation signal via a line 17 from the monitoring unit 11 or via a further parallel line 18 from the switch-on Monitoring device 13 receives.
  • a burner 3 is assigned a flame detection electrode 19, which is connected via a line 20 to a flame detection device 21, the output line 22 of which is connected to the monitoring unit 11 and in parallel to the switch-off monitoring unit 12 and the switch-on monitoring unit 13.
  • An output line 23 of the monitoring unit 11 is connected both to a solenoid 24 of the valve 4 to be monitored, which is designed as a solenoid valve, and also connected in parallel to inputs of the switch-off monitoring unit and switch-on monitoring unit 12 and 13 via a branching line 25.
  • Another output 26 of the monitoring unit is connected via a branching line 27 to the drive motor 28 of the circulating pump 7 and also via a branching line 29 to the switch-on monitoring unit 13.
  • the switch-off monitoring unit 12 is connected to the monitoring unit 11 via a line 30, likewise the switch-on monitoring unit is connected via a line 31 to an input of the monitoring unit 11.
  • Upstream and downstream of the pump 7, two risers 32 and 33 are connected, which lead to a membrane switch 34.
  • This membrane switch forms the drive for the gas valve 5 which is not to be monitored.
  • This gas valve 5 is opened when the pump is sufficiently pumped builds up pressure because it can then be assumed that a sufficient water throughput takes place through the heat exchanger 2. This valve is part of a so-called water shortage protection.
  • this gas valve 5 which is not to be checked, would also be possible, for example it could be designed as a separate gas solenoid valve, it could also be combined to form a double-seat valve with the valve 4, it could also be a valve for an ignition fuse or a room thermostat.
  • valves 4 and 5 are designed as solenoid valves, it is also possible in the context of the present invention to test both valves alternately, testing being possible both when switching on and when switching off or in all possible combinations.
  • the switch-off monitoring method has the advantage over the switch-on monitoring method that the user of the fuel-heated device does not notice anything of the test, because the device is switched off anyway. In the other case, switching on the device is delayed by the test time.
  • An oscillator 40 which generates a pulse frequency with a 10 Hz clock.
  • the oscillator is connected via an output line 41 to an input of an AND element 42.
  • This AND element has the line 22 from the flame detection device 21 as a further input, this line is connected via a branching line 43 to a negated reset input 44 of a binary counter 45.
  • a third, negated input 46 of the AND element is connected to line 25 of monitoring unit 11.
  • An output line 47 of the AND gate is connected to the counting input of the binary counter 45.
  • a comparator 48 is assigned to the binary counter, which then outputs a signal at its output 49 when a certain counter reading has been reached or exceeded.
  • the output line 30 leads back to the monitoring unit 11, where the circulating water heater 1 is then locked in a locking manner.
  • the circuit according to FIG. 2 has the following function, it being pointed out that, although it can be embodied as a circuit shown, it is actually constructed as a software program of a microcomputer. However, only the mode of operation is essential, and this can be achieved both with the circuit shown and with a software program. If by comparison of the actual value given by Sensor 9, by comparison with a target value transmitter, not shown, that a further heating of the heat exchanger 2 by the burner is no longer necessary, a closing command for the gas line 6 is given. The gas valve 4 to be checked is closed by the monitoring unit 11 removing the voltage on the line 23 during the switch-off test that is now starting, so that the solenoid 24 of the solenoid valve 4 is de-energized, which means that no signal is present on the line 25.
  • the monitoring unit 11 causes the other valve to close. This can be done by removing the voltage on line 27, because then the pump comes to a standstill and valve 5 controlled by the pump pressure closes. If the device is designed with two solenoid valves the voltage would be removed from the other solenoid valve. If the second gas valve were designed as a safety valve, an opening contact would intervene in the circuit of the thermoelectric ignition fuse. In the case of a room thermostat, it could be heated by an electrical resistor so that the second valve is switched off.
  • switch-on monitoring is carried out according to the other method, this procedure is explained in more detail in the context of FIG.
  • the line 41 of the oscillator 40 is connected to a further counter 50, to which a comparison stage 51 is assigned. A specific meter reading is stored in this. If the counted counter value exceeds the counter reading set on the comparison stage, an output signal is output on an output line 52 of the comparison stage.
  • Line 29 is routed to a negated clearing input 53 of counter 50.
  • the output 52 is connected via a line 54 to the one stop input of the counter 50.
  • the line 52 is given in parallel to two negated inputs 55 and 56 of two AND elements 57 and 58.
  • Another input 59 of the AND element 57 is formed by the line 22.
  • a further input of the AND element 58 is given by line 29, a negated input 59 is given by line 25.
  • An output of the AND element 57 is connected to the monitoring unit 11 via the line 31, an output of the AND element 58 is formed by the line 18, which leads to the ignition device 15 and from there via the line 16 to the ignition electrode 14.
  • the circuit according to FIG. 3 has the following function, it being again pointed out that the circuit could either be represented by individual components, as it is drawn, or it could also be present as a software program for a microcomputer. The latter is desirable if the controller of the fuel-heated device 1 is constructed as a microcomputer anyway. The same also applies to the switch-off monitoring process.
  • the monitoring unit 11 sends a signal to the output line 29.
  • the pump motor 28 is live, the pump 7 starts up and generates a differential delivery pressure, which the hydraulic valve 5 to Opening brings.
  • line 29 is connected to one input of AND element 58.
  • the AND gate 58 switches through.
  • the ignition is carried out via the lines 16 and 18 and the ignition device 15, so that ignition pulses continuously jump from the electrode 14 to the burner 3.
  • the counter 50 is released via the negated clearing input 53, so that pulses coming from the oscillator are continuously counted into the counter via the line 41.
  • the pump can be switched once so that it only runs when the solenoid valve 4/24 is open. However, it may also be possible for the pump to run continuously, regardless of whether the heater is heating or not. If the pump is also switched on when the device is started up, the method of monitoring the start-up of the gas valve is preferred. However, the switch-off monitoring procedure can always be carried out when the burner is switched off, regardless of whether the pump is switched off or runs. However, if it is also switched off, it must be switched off with a delay compared to the valve to be checked.

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)
  • Control Of Combustion (AREA)
EP88117908A 1987-11-06 1988-10-27 Méthode pour vérifier une soupape à gaz et dispositif de réalisation de la méthode Expired - Lifetime EP0315055B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88117908T ATE99402T1 (de) 1987-11-06 1988-10-27 Verfahren zum ueberpruefen eines gasventils und vorrichtung zur durchfuehrung des verfahrens.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3737764 1987-11-06
DE3737764 1987-11-06
DE3827294 1988-08-11
DE3827294 1988-08-11

Publications (2)

Publication Number Publication Date
EP0315055A1 true EP0315055A1 (fr) 1989-05-10
EP0315055B1 EP0315055B1 (fr) 1993-12-29

Family

ID=25861546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88117908A Expired - Lifetime EP0315055B1 (fr) 1987-11-06 1988-10-27 Méthode pour vérifier une soupape à gaz et dispositif de réalisation de la méthode

Country Status (2)

Country Link
EP (1) EP0315055B1 (fr)
DE (1) DE3886688D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000003180A1 (fr) * 1998-07-10 2000-01-20 Honeywell B.V. Procédé pour vérifier l'étanchéité de soupapes de gaz
DE102022101305A1 (de) 2022-01-20 2023-07-20 Ebm-Papst Landshut Gmbh Verfahren zur fehlersicheren und mageren Zündung eines Brenngas-Luft-Gemisches an einem Gasbrenner

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4131412A (en) * 1975-10-14 1978-12-26 Johnson Controls, Inc. Fuel ignition system having interlock protection and electronic valve leak detection
EP0010767A1 (fr) * 1978-11-06 1980-05-14 Honeywell Inc. Système de commande pour buleur
US4278419A (en) * 1979-04-30 1981-07-14 Robertshaw Controls Company Primary oil burner safety control and intermittent ignition system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4131412A (en) * 1975-10-14 1978-12-26 Johnson Controls, Inc. Fuel ignition system having interlock protection and electronic valve leak detection
EP0010767A1 (fr) * 1978-11-06 1980-05-14 Honeywell Inc. Système de commande pour buleur
US4278419A (en) * 1979-04-30 1981-07-14 Robertshaw Controls Company Primary oil burner safety control and intermittent ignition system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 9, Nr. 300 (M-433)[2023], 27. November 1985; & JP-A-60 138 326 (NIPPON DENSO K.K.) 23-07-1985 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000003180A1 (fr) * 1998-07-10 2000-01-20 Honeywell B.V. Procédé pour vérifier l'étanchéité de soupapes de gaz
DE102022101305A1 (de) 2022-01-20 2023-07-20 Ebm-Papst Landshut Gmbh Verfahren zur fehlersicheren und mageren Zündung eines Brenngas-Luft-Gemisches an einem Gasbrenner

Also Published As

Publication number Publication date
EP0315055B1 (fr) 1993-12-29
DE3886688D1 (de) 1994-02-10

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