EP0352217B1 - 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 - Google Patents

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 Download PDF

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Publication number
EP0352217B1
EP0352217B1 EP89710062A EP89710062A EP0352217B1 EP 0352217 B1 EP0352217 B1 EP 0352217B1 EP 89710062 A EP89710062 A EP 89710062A EP 89710062 A EP89710062 A EP 89710062A EP 0352217 B1 EP0352217 B1 EP 0352217B1
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EP
European Patent Office
Prior art keywords
control
lines
line
safety
microcomputer
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
EP89710062A
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German (de)
English (en)
Other versions
EP0352217A2 (fr
EP0352217A3 (en
Inventor
Dieter Bark
Wilfried Dr. Hangauer
Reiner Kind
Dietmar Manz
Ulrich Ortlinghaus
Dieter Stuch
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
Vaillant NV
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
Vaillant BV
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Application filed by Vaillant Austria GmbH, Vaillant NV, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd, Vaillant BV filed Critical Vaillant Austria GmbH
Publication of EP0352217A2 publication Critical patent/EP0352217A2/fr
Publication of EP0352217A3 publication Critical patent/EP0352217A3/de
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Publication of EP0352217B1 publication Critical patent/EP0352217B1/fr
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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
    • 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
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/19—Measuring temperature outlet temperature water heat-exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • 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
    • F23N2241/00—Applications
    • F23N2241/04—Heating water

Definitions

  • the present invention relates to a method for controlling and monitoring a fuel-heated device, in particular a circulation water heater, and to an apparatus for carrying out the method according to the preamble of patent claims 1 and 6 respectively.
  • This circulating water heater is a heat exchanger controlled by an atmospheric gas burner, the exhaust gases being extracted by a fan after passing through the heat exchanger.
  • the circulating water heater has a solenoid valve for controlling the gas supply, a safety device for monitoring the solenoid valve, a priority changeover valve for connecting the heat exchanger heated by the burner once to a continuous-flow heater for preparing hot service water and for connecting the heat exchanger to a heating system, and also a circulation pump , an ignition device and a sensor for detecting temperatures, water and air flow and the mode of operation. The measured values are recorded, the measured values are processed and the actuators of the circulating water heater are controlled via the microcomputer.
  • Any device fired with gas or oil or solid fuels can be regarded as a fuel-heated device, be it a room heater, an air heating system, a heater for hot domestic water, a circulating water heater for feeding central heating with parallel domestic hot water preparation, if necessary, and a boiler.
  • Microcomputer systems as in the prior art give their signals to so-called output stages, which are designed as current or voltage amplifiers and which control the actuators of the fuel-heated device. These are, for example, driver transistors for solenoid or changeover valves, a phase gating or pulse pause or pulse packet control for the pump or the exhaust gas fan and the like.
  • the present invention is based on the object of specifying a method for controlling and monitoring a fuel-heated device, in which the device is switched off depending on the safety-related relevance if a fault is detected in any way or is to be assumed. Errors in the two-channel microcomputer system must also be taken into account.
  • the present invention further relates to an apparatus for performing this method.
  • the heat exchanger is switched to a secondary hot water heat exchanger, so that the heat is first transferred from the exhaust gas to the heating system in the primary heat exchanger, then from the heating system to the hot water in the secondary heat exchanger. Opening and closing of the nozzle is recognized by a water switch, which starts when the water is drawn off and switches the burner and the circulation pump on.
  • the primary heat exchanger is heated and that on the other hand the heat from the heating water in the domestic water heat exchanger is transported.
  • the nozzle When the nozzle is closed, the burner goes out, but at the same time the pump comes to a standstill, since it is to be prevented that warm heating water - for example in summer operation - gets into the heating system.
  • the water in the primary heat exchanger thus comes to a standstill, but the highly heated fins of the heat exchanger, especially when it is designed as a stainless steel heat exchanger, reheat the water.
  • a control, regulating and monitoring system 1 is connected via two lines 2 and 3 to a gas control device 4 which is inserted into a gas line 5 between a gas connection 6 and a gas burner 7.
  • An ignition electrode 8 and a flame sensor 10 are assigned to the burner 7, the electrode 8 being connected to the control system 1 via a line 9 and the flame sensor 10 via a line 11.
  • a heat exchanger 12 of the circulating water heater shown is located above the burner 7. The heat exchanger is provided with a flow line 13 against which two temperature sensors 14 and 15 are connected, which are connected to the control system 1 via lines 16 and 17.
  • a pump 19 connected to the control system 1 via a line 18 and provided with an electric motor ensures that the heating water is circulated via the supply line 13, the return line 20, the heat exchanger 12 and the heating system 21 to be heated.
  • FIG. 1 The structure of the control, regulating and monitoring system 1 is shown in FIG.
  • a microcomputer system A with the reference symbol 22 is connected to a safety shutdown device 28 via a control line 23a, 23b and a feedback line 24.
  • a second identical microcomputer system B with the reference numeral 25 is connected to the same safety shutdown device 28 via a control line 26a, 26b and a feedback line 27.
  • the microcomputer systems 22 and 25 can exchange data via a bidirectional interface 29.
  • Each microcomputer system has a program for self-monitoring, the self-monitoring module 30 or 31.
  • the microcomputer system 22 is assigned an additional circuit for running time monitoring, the running time monitoring module 32, which also acts on the safety shutdown device 28 via a line 33.
  • the safety shutdown device 28 is supplied with voltage from a network or a battery via the line 34. All final stages of actuators, the gas valve final stage 35, the gas flow setting final stage 45, the pump final stage 36 and the ignition device 37 are supplied with voltage by the safety shutdown device 28 via a line 38.
  • the gas valve output stage 35 is from the microcomputer system 22 via line 50, the pump output stage 36 from the microcomputer system 25 the line 51 and the ignition device 37 are controlled by the microcomputer system 25 via the line 52.
  • the output signal of the gas valve output stage 35 is reported back to the microcomputer system 22 via a line 39 and to the microcomputer system 25 via a line 40.
  • the state of the pump output stage 36 and the ignition device 37 are reported to the microcomputer system 25 via lines 46 and 47, respectively.
  • the gas valve output stage 35 is connected via line 2, the pump output stage 36 via line 18 and the ignition device 37 via line 9 to the circulating water heater.
  • the microcomputer system 25 receives information from the circulating water heater.
  • the signal of line 11 is processed by flame monitor 41 and made available to microcomputer systems 22 and 25 via lines 42 and 43.
  • the microcomputer systems 22 and 25 receive additional parameters necessary for the regulation and control, which, however, are not explained in more detail here (flow temperature regulation, return temperature regulation, process water temperature regulation and the like).
  • Both microcomputer systems 22 and 25 are connected to the interference suppressor 49 via the lines 48 a and 48 b.
  • An output stage for gas flow control 45 is assigned to the microcomputer system 25, which in turn is coupled via line 3 to the gas control device 4, which is a proportional gas valve.
  • FIG. 3 shows the structure of the safety shutdown device 28.
  • the lines 23 a, 26 a and 33 lead to a link 60, the lines 23 b and 26 b to a further link 61.
  • An output of the link 60 controls a winding of a normally open relay 62 a .
  • the link 61 controls a winding of a normally closed relay 63 a.
  • the line 34 is connected to a fuse 64, the second pole of which is led to the first pole of the normally open relay contact 62 b.
  • the second pole of the normally open relay contact 62 b is connected to the first pole of the normally closed relay contact 63 b and the lines 24, 27 and 38.
  • the second pole of the normally closed relay contact 63 b is grounded.
  • a resistor 65 is connected in parallel with the contact of the normally open relay 62 b.
  • Supply voltage 34 is routed to the side of fuse 64 facing away from normally open relay contact 62 b.
  • the circulating water heater shown in the drawings or the control method works as follows:
  • the control, regulating and monitoring system 1 consists of two independent microcomputer systems 22 and 25, that perform the same security-related but different non-security-related tasks.
  • the first includes the functions of the temperature limiter (the temperature on the flow line 13 must not exceed a certain value), the function of the burner control (after opening the gas valve 4, a flame must be reported after a certain time, which is the safety time, otherwise there is a closing of the gas valve and a fault message), the control and monitoring of the safety time shutdown device 28 and the monitoring of fault states.
  • Additional sensors and actuators also monitor for a lack of water (enough water throughput through the heat exchanger 12), a monitoring of the air supply (if there is sufficient air throughput through the combustion shaft of the circulating water heater, which corresponds to the set gas throughput), and monitoring for the exhaust gas to escape (A flow safety device is located above the heat exchanger; if exhaust gas exits through its openings - except in the chimney - the circulating water heater must be stopped) and monitoring of any flue gas flap in the exhaust pipe to the chimney.
  • the control system 1 fulfills the flow temperature control, possibly also hot water temperature control, for non-safety-related tasks or a burner output control. Additional sensors can also be used to implement weather-compensated flow or return temperature control.
  • the microcomputer systems 22 and 25 exchange the detected input variables, i.e. flame detection, exhaust gas outlet, flow temperature as well as the determined intermediate and output variables (necessary position of the gas valve or igniter in operation) via the bidirectional interface 29. If there are contradictions between the results of both microcomputer systems, the operation of the circulation water heater is prevented.
  • the safety-relevant input variables that is the temperature at the heat exchanger outlet in the flow line 13, detected by the temperature sensors 14 and 15, the signal from the interference suppressor 49, the feedback on the lines 24, 27 of the safety shutdown device 28 and the gas valve output stage 39, 40 and the signal of the flame monitor 41 are read by both microcomputer systems 22 and 25. Two temperature sensors are therefore used to measure the temperature at the heat exchanger outlet because they do not have a fail-safe behavior.
  • the non-safety-relevant input variables including the inputs 44 a for the microcomputer system 22 and the inputs 44 b and for the feedback signals 46 and 47 for the microcomputer system B, are each recorded by only one microcomputer system.
  • the gas valve output stage 35 that is the output stage which acts directly on the gas release, is controlled by the microcomputer system 22, but is checked by both microcomputer systems 22 and 25 via the feedback lines 39 and 40.
  • All other output stages, the pump output stage 36, the ignition device 37 and the gas flow control 45 are only controlled by the microcomputer system 25.
  • the state of the pump output stage 36 is monitored via line 37, the state of the ignition device via line 47.
  • the runtime monitoring module 32 is triggered cyclically by the microcomputer system 22. If the trigger pulses fail to appear, the operation of the circulating water heater is prevented.
  • the self-monitoring modules 30 and 31 cyclically test the components, which are erasable and non-erasable memories, the central unit of the microcomputer and the input and output circuitry of the microcomputer systems. If one fails These components prevent the circulation water heater from operating.
  • the operation of the circulating water heater is prevented.
  • the operation of the circulating water heater is prevented by blocking all output stages 35, 36, 37 and 45 and by switching off the safety shutdown device 28 via the control line 23 a, 23 b, 26 a and 26 b. Pressing the reset button 49 can suppress interference that was not caused by an error in the control unit (1), which means that operation is then possible again.
  • the safety shutdown device 28 provides the output stages 35, 36, 37 and 45 with the supply voltage via the relay make contact 62b.
  • the relay closer contact 62 b is only closed when both microcomputer systems 22 and 25 give their release via the control lines 23 a and 26 a and the runtime monitoring 32 via the line 33.
  • the relay opener contact 63 b which only opens when it is controlled by both microcomputer systems 22 and 25 via the control lines 23 b and 26 b, the supply voltage 34 can be short-circuited to ground. Through the resistance 65, the position of the relay opener contact 63 b can be determined when the relay closer contact 62 b is open.
  • Switching off takes place by blocking (passive setting) the control lines 23 a, 26 a, 23 b and 26 b.
  • the feedback lines 23 and 27 must not report a signal, since otherwise there is an error in the safety shutdown device 28, the control lines 23 a, 23 b, 26 a and 26 b or the feedback lines 23 and 27.
  • FIG. 4 shows a basic circuit diagram of a circulation water heater I.
  • Modern circulation water heaters are controlled and regulated by a microprocessor, so that it makes sense to transfer safety tasks to the microcomputer in addition to the control and regulation tasks. Control processes for reducing the residual heat or for releasing the renewed heat supply can therefore also be transmitted to microprocessors, so that, for example, the circuit according to FIG. 5 can also be represented as a software program of microcomputers.
  • a circulating water heater I has a stainless steel finned heat exchanger 12 which is heated by a burner 7 and which a return line 105 provided with a pump 19 and a flow line 13 provided with a priority changeover valve 106 are connected, the latter having two temperature sensors 14 and 15 which are connected to measuring lines 16 and 17 which are connected to inputs of a control, regulation and Lead monitoring unit 1.
  • the priority changeover valve 106 which can be actuated by a servo drive 103, the flow line 13 continues into a heating flow line 114 and a flow line 115 for a process water secondary heat exchanger 116.
  • the priority changeover valve 106 can assume two positions; when line 114 is opened, line 115 is closed and vice versa.
  • the flow line 114 leads to a heating system, not shown, and back via a heating return line 20 to a union point 118, to which the return line 105 is connected.
  • the hot water heat exchanger 116 is followed by a hot water return line 119, which likewise leads to the union point 118.
  • the domestic water heat exchanger 116 and the line 119 are arranged within the housing of the circulating water heater I. Upstream and downstream of the pump 19, two pressure lines 120 and 121 are provided which lead to a membrane switch 122 which controls a gas valve 124 located in a gas line 5 to the burner 7.
  • a second gas valve 125 is arranged in the line 5 between the valve 124 and the burner 7 and is controlled by a magnetic coil 126 which is connected to the control unit 1 via a control line 127.
  • a magnetic coil 126 which is connected to the control unit 1 via a control line 127.
  • an ignition electrode 8 which is supplied with ignition energy from an ignition device 37 via a line 9, the ignition device 37 being acted upon by the control unit via a line 131.
  • An ionization electrode 10 is connected via a line 11 to a flame detection device 134, which reports a flame signal or no flame signal back to the control unit 1 via a line 135.
  • the pump 19 is assigned a drive motor 136, which receives its energy from the control unit via a line 18.
  • an exhaust gas fan 138 is provided, which is arranged in the exhaust gas flow of the exhaust pipe downstream of the heat exchanger 12.
  • This has a drive motor 139, which receives its drive energy from the control unit 1 via a line 140.
  • the servo motor 113 of the priority switch valve 106 draws its actuating energy via a line 141 in the same way from the control unit.
  • a tap water line 142 which comes from a cold water network, leads through the hot water heat exchanger 116, leads through the heat exchanger 116 and is provided with a water switch 143 before it comes to a tap valve 144.
  • the water switch is able to determine whether water throughput takes place through line 142 and reports a corresponding signal via line 145 to the control unit.
  • the control, regulating and monitoring unit 1 is assigned a temperature limiter unit 146, both of which are connected to one another via a line bundle 147, the actual value of the flow temperature being transmitted from the control unit to the temperature limiter and from the temperature limiter to the control unit, the possible switch-off and fault commands will.
  • Lines 135, 145, 127 and 18 are routed to the temperature limiter as inputs.
  • a reset button 49 is also provided, which is connected to the temperature limiter via a line 149.
  • a limit value sensor 150 is provided for the flow temperature, with which an adjustable limit value can be specified, specifically via a line 151 to the temperature limiter 146. If a fan 138 is present, an output 152 for controlling the fan is provided, which is connected to line 140 is connected. The function of the circuit shown is now illustrated in more detail with reference to FIG. 5:
  • An oscillator 160 is initially provided, which delivers a pulse voltage with a specific frequency at its output 161.
  • the frequency is assumed to be 10 Hertz.
  • the oscillator 160 is connected to a binary counter 162, to which a comparator 163 is assigned.
  • a negated erase input 164 of the counter 162 is connected to the line 145, which also leads to an input of an AND gate 165, the negated input 166 of which forms the output of the comparator 163.
  • An output 167 of the AND gate forms a negated input 168 of a further AND gate 169, on the output 170 of which a switch-off command for the entire circulating water heater I can appear.
  • a switch-off command here means that the solenoid valve 125 is de-energized, the motor 136 for the pump 19 is de-energized.
  • the other input 171 of the AND element 169 is formed by an output 172 of a comparator 173, the inputs of which are connected to line 151 and to the other the lines 16 or 17 are connected. The higher of the measured values of the lines 16 or 17 is taken, which can be determined via a further comparator, not shown here is.
  • the output 172 is connected via a line branch to an input 174 of an AND gate 175, the output of which forms the line 152.
  • Line 172 forms a further input 176 of a further AND gate 177, the output 178 of which forms a set input of a bistable multivibrator 180, whose output 181 forms the other input 182 of the AND gate 175 and a line 183 carrying a fault signal.
  • the output 172 is connected to a negated input 184 of an AND gate 185, the other input of which is formed by the line 149 and the output 186 of which is connected to the reset input of the bistable multivibrator 180.
  • An OR gate 187 is provided, the three inputs of which are connected to lines 127, 135 and 18 and the output 188 of which forms the other input 189 of the AND gate 177.
  • Lines 170 and 183 are part of line bundle 147 and carry signals from temperature limiter 146 to control unit 1.
  • the function is as follows: It is assumed that the circulating water heater supplies process water. This means that the nozzle valve 144 is more or less open, that the priority changeover valve 106 connects line 13 to line 115, pump 19 runs, both valves 124 and 125 are open, burner 7 burns and flame detection device 134 outputs a flame detection signal on line 135. The heat generated by the burner 7 is thus transferred in the heat exchanger 12 to the heating water and from there in the process water heat exchanger 116 to the process water in line 142. A flow temperature is set, which varies between 50 and 80 ° depending on the desired hot water temperature.
  • the water switch 143 registers “no water”. As a result, a corresponding signal on line 145 is sent to both control unit 1 and safety temperature limiter 146.
  • the control unit 1 causes the solenoid valve 125 to close and the drive motor 136 of the circulating pump 19 to be shut down via the lines 127 and 137.
  • the burner thus goes out, and the heat stored in the heat exchanger 12 can no longer be dissipated due to the pump being stopped.
  • the temperature of the water in the flow line 13 rises considerably, it should be noted here that the temperature sensors 14 and 15 are located directly on the heat exchanger 12 in the flow line are arranged. The rising temperature is reported to the control unit 1 and likewise to the temperature limiter 146. In the temperature limiter, the increasing actual flow temperature value is compared with the limit value specified by the limit transmitter 150 and the line 151.
  • the circuit according to FIG. 5 has the following function: The higher of the two values supplied by the sensors 14 and 15 is connected to the comparator 173, the comparison with the switch-off limit value 150 means that the line 172 leads logically "zero". There is a signal on lines 127, 135 and 18 so that output 188 is logic "one", and gate 177 is blocked because only one input is logic "one”. There is therefore no interference signal, no fan signal and no shutdown signal. If a fan is present, the fan is operated by a control signal from control unit 1.
  • the time is calculated so that it corresponds to the time within which the residual heat is dissipated by the heat exchanger. After this time, the temperature sensors 14 and 15 would have to measure relatively cool flow temperature water again.
  • the comparator 173 is tilted when it is switched off because the actual flow temperature value has exceeded the limit value due to the residual heat.
  • the AND gate 169 becomes conductive because its two inputs are live, and then a switch-off signal appears on line 170. If the residual heat is properly dissipated, the comparator 173 tilts back and enables the device to continue operating. This circuit can thus be used to determine whether it is merely a case of post-heating acted or a long-standing disorder. If the residual heat has been dissipated within the delay time, the control unit is released again for normal operation via line 170.
  • the temperature limiter function is as follows: If the actual value of the flow temperature reported by temperature sensors 14 and 15 rises above the set flow temperature limit (set on limit transmitter 150), the comparator 173 tilts in any case. This is irrespective of whether this is the case during normal operation with hot water preparation or heating occurs or in the event of a flame cut. This means that voltage or a signal is logically "one" at input 176 of AND gate 177. The fault is only recognized and reported as a fault if one of the lines 127, 135 and 18 is live. One must then assume that an intended operation of the device is desired, but then the temperature increase of the flow line represents an impermissible operating state, which is a safety case. Then the second input 189 of the AND gate 177 carries voltage, the AND gate 177 switches through and sets the bistable multivibrator 180. This causes a fault signal on line 183, so that the control unit 1 blocks the operation of the circulating water heater.
  • This blocking means that the magnet 126 and the pump drive motor 136 become de-energized.
  • the motor 139 of the fan 138 receives Voltage and tries to dissipate the heat at the heat exchanger 12 by passing cold air through the heat exchanger 12 until the comparator 173 tilts back again.
  • the interference can be suppressed by pressing the reset button 49 via line 149, since then the reset input of the bistable multivibrator 180 receives voltage via line 186.
  • this is only possible if the temperature is below the switch-off temperature, since the output 172 of the comparator 173 is at the negated input 184 of the AND gate 185.

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  • 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)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Control Of Combustion (AREA)
  • Control For Baths (AREA)

Claims (9)

  1. Procédé pour la régulation et la surveillance d'un appareil chauffé par un combustible, notamment d'un chauffe-eau à circulation, à l'aide d'un système de contrôle et de régulation (1) qui comprend deux ensembles micro-ordinateurs (22, 25) qui, tous les deux, reçoivent à l'entrée les signaux ayant trait à la sécurité, tels que contrôle des flammes, limitation des températures, surveillance du débit d'eau et d'air et contrôle des gaz brûlés, chacun des deux ensembles (22, 25) élaborant individuellement les signaux respectifs qui en résultent, un signal de sortie n'étant cependant émis aux étages finaux concernés (35, 36, 37, 45) que si les ordres formés par les deux ensembles (22, 25) sont identiques, chacun des deux ensembles (22, 25) ayant individuellement la possibilité de mettre hors circuit tous les étages finaux (35, 36, 37, 45), à l'aide d'un étage disjoncteur (28), et d'assurer ainsi le fonctionnement sûr de l'appareil, procédé caractérisé par le fait que,
    en cas de perturbations dans le système de contrôle et de régulation (1), tous les étages finaux (35, 36, 37, 45) sont mis hors circuit pour la durée de la perturbation,
    en cas de perturbations non dangereuses dans l'appareil chauffé par un combustible, par exemple manque d'eau, tous les étages finaux (35, 36, 37, 45) sont mis hors circuit jusqu'à la coupure ou le rétablissement de l'alimentation en tension secteur,
    en cas de perturbations dangereuses dans l'appareil chauffé par un combustible, par exemple dépassement de température dans l'échangeur de chaleur, tous les étages finaux (35, 36, 37, 45) sont mis hors circuit jusqu'au déblocage moyennant une touche de dépannage (49), et
    en cas de perturbations dans l'étage disjoncteur (28) ou de défauts dans l'étage final (35) de la valve de gaz, tous les étages finaux (35, 36, 37, 45) sont mis hors circuit sans limitation dans le temps.
  2. Procédé suivant la revendication 1, caractérisé par le fait que des fonctions de commande et de régulation n'affectant pas la sécurité sont réparties sur les micro-ordinateurs (22, 25) de sorte à charger uniformément les deux micro-ordinateurs (22, 25).
  3. Procédé suivant la revendication 1 ou 2, caractérisé par le fait que la régulation d'un chauffe-eau à circulation dont la température de départ, la marche de la pompe de circulation, l'état de fermeture respective d'ouverture de la valve de combustible et la formation de flammes sont surveillés, admet un dépassement de courte durée de la température de départ de consigne si aucune flamme n'est signalée, ni aucun ordre agissant sur la pompe (19) et la valve de combustible (125/126).
  4. Procédé suivant la revendication 3, caractérisé par le fait que pour la régulation d'un chauffe-eau à circulation avec un échangeur de chaleur secondaire (116) assurant la fourniture d'eau sanitaire, la pompe (19) est mise en circuit pour une certaine durée sans qu'il y ait alimentation en combustible, et qu'après ce temps, l'alimentation en combustible est débloquée si la température de départ effective est inférieure à un seuil préréglé.
  5. Procédé suivant la revendication 3 ou 4, caractérisé par le fait que sur un chauffe-eau à circulation avec ventilateur, en cas d'une perturbation par suite d'une température de départ supérieure au seuil préréglé, seul le moteur (139) du ventilateur (138) est commandé jusqu'à ce que la température de départ effective soit inférieure audit seuil.
  6. Dispositif pour l'application du procédé suivant l'une des revendications 1 à 5 sur un appareil chauffé par un combustible, notamment un chauffe-eau à circulation, et qui comprend un échangeur de chaleur (12) chauffé par un brûleur (7), une pompe de circulation (19), des électrovalves pour l'alimentation en combustible du brûleur (7), un dispositif d'allumage (8) et un détecteur de flammes (10) ainsi que nombre d'éléments sensibles et de capteurs pour la saisie d'informations relatives aux températures et débits ainsi qu'au fonctionnement de l'appareil, l'ensemble des fonctions de régulation, de sécurité et de commande pour assurer la combustion et la circulation d'eau étant surveillé par un système de contrôle et de régulation (1) avec deux ensembles micro-ordinateurs (22, 25) qui traitent les valeurs fournies par les éléments sensibles et les capteurs et les comparent à des consignes mémorisées, les deux ensembles micro-ordinateurs (22, 25) communiquant entre eux par des interfaces bidirectionnelles (29), et les sorties des ensembles (22, 25) étant reliées par des lignes de commande (23a, 23b, 26a, 26b) à un étage disjoncteur (28) agissant sur la tension d'alimentation (34) des étages finaux (35, 36, 37, 45), l'action d'un des ensembles micro-ordinateurs (22 ou 25) sur l'étage disjoncteur (28) étant suffisante pour arrêter l'appareil, dispositif caractérisé par le fait que les deux ensembles (22, 25) ont des entrées auxquelles est appliqué en parallèle un signal émis par un capteur de mesure (41) à l'abri de pannes, ou auxquelles sont reliés, sans effet de retour, les éléments sensibles (14, 15) non à l'abri de pannes, par des lignes (16, 17).
  7. Dispositif suivant la revendication 6, caractérisé par le fait que l'étage disjoncteur (28) comprend un montage en série entre un fusible (64), un contacteur (62b) shunté par une résistance (65) et un rupteur (63b) en série, montage dont les deux bouts sont mis à la tension de référence (34, masse), et que les étages finaux (35, 36, 37, 45) sont connectés au point de branchement situé entre les deux contacts (62b, 63b).
  8. Dispositif suivant l'une des revendications 6 ou 7, caractérisé par le fait que, parallèlement aux lignes de commande (23a, 23b, 26a, 26b), des lignes de retour (24, 27) sont prévues permettant de relever toute panne sur chaque composant (64, 65, 62b, 63b, 62a, 63a) de l'étage disjoncteur (28), la signalisation d'un défaut par une suite d'impulsions sur les lignes de commande (23a, 23b, 26a, 26b) provoquant la coupure, sans limitation dans le temps, de la tension appliquée par l'étage disjoncteur (28) sur la ligne (38) alimentant tous les étages finaux (35, 36, 37, 45).
  9. Dispositif suivant la revendication 8, caractérisé par le fait qu'un défaut est supposé si les lignes de commande (23a, 23b, 26a, 26b) sont bloquées et les lignes de retour (24, 27) émettent un signal, ou si les lignes de commande (23a, 26a, 26b) sont bloquées et la ligne de commande (23b) est débloquée et les lignes de retour (24, 27) émettent un signal, ou si les lignes de commande (23b, 26a, 26b) sont bloquées et la ligne de commande (23a) est débloquée et les lignes de retour (24, 27) émettent un signal, ou si les lignes de commande (23a, 23b, 26b) sont bloquées et la ligne de commande (26a) est débloquée et les lignes de retour (24, 27) émettent un signal, ou si les lignes de commande (23a, 26a) sont bloquées et les lignes de commande (23b, 26b) sont débloquées et les lignes de retour (24, 27) n'émettent pas de signal, ou si les lignes de commande (23a, 23b, 26a, 26b) sont débloquées et les lignes de retour (24, 27) n'émettent pas de signal.
EP89710062A 1988-07-20 1989-07-18 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 Expired - Lifetime EP0352217B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE3825038 1988-07-20
DE3825038 1988-07-20
DE3827181 1988-08-08
DE3827181 1988-08-08
DE3827295 1988-08-11
DE3827295 1988-08-11

Publications (3)

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EP0352217A2 EP0352217A2 (fr) 1990-01-24
EP0352217A3 EP0352217A3 (en) 1990-12-12
EP0352217B1 true EP0352217B1 (fr) 1994-09-14

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EP89710062A Expired - Lifetime EP0352217B1 (fr) 1988-07-20 1989-07-18 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

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EP (1) EP0352217B1 (fr)
AT (1) ATE111587T1 (fr)
DE (1) DE58908350D1 (fr)

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DE102006008475A1 (de) * 2006-02-23 2007-08-30 Siemens Building Technologies Hvac Products Gmbh Verfahren zur sicherheitsgerichteten Ansteuerung eines Stellgliedes

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NL9000789A (nl) * 1990-04-04 1991-11-01 Interconnection B V Beveiligingsschakeling voor een verwarmingsinrichting.
DE9310449U1 (de) * 1993-03-05 1994-07-14 Landis & Gyr Business Support Ag, Zug Spannungsversorgung für ein insbesondere redundantes Rechnersystem einer Steuereinrichtung
DE4421361A1 (de) * 1994-06-18 1995-12-21 Diehl Gmbh & Co Gasbeheiztes Gerät
ES2220313T3 (es) * 2000-10-06 2004-12-16 Honeywell B.V. Circuito de control.
EP1479984A1 (fr) * 2003-01-30 2004-11-24 Vaillant GmbH Procédé et apparail pour l'identification préventive d'érreurs avec dispositif regé électroniquement
AT14475U1 (de) * 2014-03-12 2015-11-15 Lasco Heutechnik Gmbh Mobile Feuerungsanlage
CN113513767B (zh) * 2021-07-19 2023-07-28 国网天津市电力公司电力科学研究院 一种深度调峰燃煤机组磨煤机切换稳燃装置及方法

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US4518345A (en) * 1983-02-28 1985-05-21 Emerson Electric Co. Direct ignition gas burner control system
US4695246A (en) * 1984-08-30 1987-09-22 Lennox Industries, Inc. Ignition control system for a gas appliance
DE3532017A1 (de) * 1985-09-07 1987-03-19 Bosch Gmbh Robert Sicherheitsschaltung zum steuern kritischer lasten von gas- oder oelbrennern
US4854852A (en) * 1987-09-21 1989-08-08 Honeywell Inc. System for redundantly processing a flame amplifier output signal
EP0315042B1 (fr) * 1987-11-06 1993-05-19 Joh. Vaillant GmbH u. Co. Commande d'une source de chaleur chauffée au carburant
EP0315053B1 (fr) * 1987-11-06 1994-02-09 Joh. Vaillant GmbH u. Co. Automate de brûleur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006008475A1 (de) * 2006-02-23 2007-08-30 Siemens Building Technologies Hvac Products Gmbh Verfahren zur sicherheitsgerichteten Ansteuerung eines Stellgliedes

Also Published As

Publication number Publication date
EP0352217A2 (fr) 1990-01-24
ATE111587T1 (de) 1994-09-15
DE58908350D1 (de) 1994-10-20
EP0352217A3 (en) 1990-12-12

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