EP0315042B1 - Commande d'une source de chaleur chauffée au carburant - Google Patents

Commande d'une source de chaleur chauffée au carburant Download PDF

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Publication number
EP0315042B1
EP0315042B1 EP88117874A EP88117874A EP0315042B1 EP 0315042 B1 EP0315042 B1 EP 0315042B1 EP 88117874 A EP88117874 A EP 88117874A EP 88117874 A EP88117874 A EP 88117874A EP 0315042 B1 EP0315042 B1 EP 0315042B1
Authority
EP
European Patent Office
Prior art keywords
microprocessors
heat source
control
microprocessor
fuel
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
EP88117874A
Other languages
German (de)
English (en)
Other versions
EP0315042A1 (fr
Inventor
Dietmar Manz
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.)
N.V. VAILLANT S.A.
VAILLANT-SCHONEWELLE 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
Vaillant-Schonewelle BV
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, Vaillant-Schonewelle BV filed Critical Vaillant Austria GmbH
Priority to AT88117874T priority Critical patent/ATE89659T1/de
Publication of EP0315042A1 publication Critical patent/EP0315042A1/fr
Application granted granted Critical
Publication of EP0315042B1 publication Critical patent/EP0315042B1/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
    • F23N5/24—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
    • 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
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/18—Measuring temperature feedwater temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/16—Flame sensors using two or more of the same types of flame sensor
    • 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
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/14—Fuel valves electromagnetically operated

Definitions

  • the present invention relates to a control for a fuel-heated heat source according to the preamble of the independent claim.
  • Fuel-heated heat source is to be understood here to mean any gas or oil-heated device, for example a gas or oil-heated storage tank, boiler, circulation water heater with and without process water preparation or a continuous-flow water heater. As is known, all of these devices require a flame arrester, which can also be designed as an automatic burner control. Newer burner controls are increasingly trained to incorporate microprocessor technology, which then opens up the possibility of having other functions monitored and controlled by the microprocessor.
  • the object of the invention is to realize a temperature limiter of a Umlaur water heater based on this technique.
  • FIG. 1 shows an embodiment of the invention.
  • a fuel-heated heat source 1 consists essentially of a heat exchanger 2, which is connected to a return line 3 and a flow line 4 and which is heated by a burner 5, which is fed via a fuel supply line 7 provided with a solenoid valve 6.
  • the flow line 4 is assigned 2 actual temperature sensors 8 and 9, which are designed, for example, as temperature-dependent resistors with NTC or PTC behavior. A different configuration of the actual value transmitters 8 and 9 would also be possible. Voltages are thus present on the associated connecting lines 10 and 11, the actual value of which is variable with the temperature of the flow line 4. If necessary, the voltage values could be linearized or damped.
  • a controller 12 is provided which has two microprocessors 13 and 14 which operate in two-channel technology.
  • the lines 10 and 11 are each fed to one of the microprocessors 13 and 14. Furthermore, a setpoint generator 15 is provided, which is also connected to both microprocessors 13 and 14 via lines 16 and 17. The same applies to an interference suppression device 18, which consists essentially of a button that is connected via a line 19 to both microprocessors 13 and 14. The states of both microprocessors 13 and 14 can be transmitted to the other microprocessor 14 or 13 via a compensation line 20, the line 20 in practice consisting of a line bundle.
  • One output 21 and 22 of each of the two microprocessors 13 and 14 is provided on a safety shutdown stage 23, which is connected via a line 24 to a solenoid 25 of the solenoid valve 6.
  • the control shown works as follows. After the burner 5 has been put into operation via a burner control, not shown, its exhaust gas heats the heat exchanger 2, so that the temperature of the feed line 4 rises.
  • the actual values of the temperature are measured via the actual value transmitters 8 and 9 designed as NTC resistors and are applied to both microprocessors 13 and 14. In these microprocessors 13 and 14, they are continuously compared with the setpoint predetermined by 15. It is possible that the analog values of the temperatures are first digitized before processing and before comparison. Accordingly, each microprocessor 13 and 14 independently detects the actual temperature either on the flow line 4 or - with a corresponding arrangement of the actual value transmitters 8 and 9 - directly on the lamella block or on the cast body of the boiler.
  • the one in the microprocessor 13 or 14 respectively processed actual temperature value is made available to the other microprocessor 14 or 13 via the compensation line 20. If there are deviations between the two actual values beyond a permissible level, the safety shutdown stage 23 is actuated via the output line 21 or 22, so that the solenoid valve 6/25 is closed. The same happens when the processed actual value of one of the transmitters 8 or 9 in the microprocessor 13 or 14 reaches the target value 15. Then the associated microprocessor 13 or 14 also causes the safety shutdown stage 23 to respond and thus the solenoid valve 6/25 to close. Accordingly, it is possible both to monitor the actual value transmitters 8 and 9 and to perform a safety shutdown via the other 14 or 13 if one microprocessor 13 or 14 fails.
  • the data exchange also makes it possible for the other microprocessor 13 or 14 to switch off in the event of a defective actual value transmitter 8 or 9 and the defect of the microprocessor 14 or 13 which is not associated with it, via the data exchange. Since each microprocessor 13 or 14 has a sensor area and a switch-off area, the switch-off function is also ensured if either both areas of a microprocessor 13 or 14 are in order or, in the case of a microprocessor 13 or 14, the sensor area and other microprocessor 14 or 13 the switch-off area is in order, since the measured value can always reach the switch-off area via the exchange line 20.
  • each of the microprocessors 13 and 14 there are transmitters which monitor the connected actual value transmitter 8 or 9 to determine whether there is an open circuit or a short circuit. Even then, the solenoid valve 6/25 can be switched off via each of the two microprocessors 13 and 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)

Claims (2)

  1. Dispositif régulateur pour une source de chaleur avec une électrovalve (6,25) pour un brûleur, destiné à la limitation de la température d'un fluide à chauffer à l'aide d'un microprocesseur, caractérisé par le fait que deux microprocesseurs (13, 14) sont prévus coopérant chacun avec un capteur (8, 9) qui mesure la température du fluide, les microprocesseurs (13 et 14) comparant les valeurs mesurées aussi bien avec une consigne qu'entre elles et émettent un signal commandant la fermeture de l'électrovalve (6,25) au moment où la consigne est atteinte ou les valeurs effectives des deux microprocesseurs (13 et 14) s'écartent l'une de l'autre de façon inadmissible, ou un court-circuit ou une rupture de câble se produit du fait que des valeurs limite données ne sont pas atteintes ou sont dépassées.
  2. Dispositif régulateur suivant la revendication 1, caractérisé par une utilisation des microprocesseurs (13, 14) pour la régulation et la commande simultanées de la source de chaleur au moyen des mêmes capteurs (8, 9).
EP88117874A 1987-11-06 1988-10-27 Commande d'une source de chaleur chauffée au carburant Expired - Lifetime EP0315042B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88117874T ATE89659T1 (de) 1987-11-06 1988-10-27 Steuerung fuer eine brennstoffbeheizte waermequelle.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3737761 1987-11-06
DE3737761 1987-11-06
DE3827019 1988-08-05
DE3827019 1988-08-05

Publications (2)

Publication Number Publication Date
EP0315042A1 EP0315042A1 (fr) 1989-05-10
EP0315042B1 true EP0315042B1 (fr) 1993-05-19

Family

ID=25861542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88117874A Expired - Lifetime EP0315042B1 (fr) 1987-11-06 1988-10-27 Commande d'une source de chaleur chauffée au carburant

Country Status (2)

Country Link
EP (1) EP0315042B1 (fr)
DE (1) DE3881154D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0352217B1 (fr) * 1988-07-20 1994-09-14 Joh. Vaillant GmbH u. Co. Méthode de commande et de surveillance d'un appareil chauffé au fuel par l'utilisation d'au moins un système à micro-ordinateur et dispositif d'exécution de cette méthode

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3160197A (en) * 1964-12-08 Bummer safeguard control apparatus
DE2318072C3 (de) * 1973-04-06 1982-10-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt System zur Überwachung und Fehlermeldung in sicherheitstechnischen Anlagen
US4087229A (en) * 1976-06-28 1978-05-02 Robertshaw Controls Company Automatic fuel ignition system with redundant flame sensing
DE2638653A1 (de) * 1976-08-27 1978-03-02 Kloeckner & Co Einrichtung zum ueberwachen von feuerungsanlagen
US4096989A (en) * 1977-06-20 1978-06-27 The Bendix Corporation Monitoring apparatus for redundant control systems
GB2019622B (en) * 1978-04-14 1982-04-07 Lucas Industries Ltd Digital computing apparatus
DE3532017A1 (de) * 1985-09-07 1987-03-19 Bosch Gmbh Robert Sicherheitsschaltung zum steuern kritischer lasten von gas- oder oelbrennern

Also Published As

Publication number Publication date
DE3881154D1 (de) 1993-06-24
EP0315042A1 (fr) 1989-05-10

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