RU2334915C2 - Method and diagram of gas flow firing - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: invention is referred to method and diagram of automatic gas-flow firing. Thermal and electrical valve of safe firing system opens as soon as electronic control unit is actuated by electrical magnet induced by current of short pulse. Valve is kept open by electrical magnet of safe firing system. Hold-on current from voltage supply goes through the magnet and outgoing gas is set to fire. As soon as needed hold-on current is supplied by thermal element, voltage supply is disconnected. In case of emergency, process is automatically terminated.

EFFECT: minor consummation of current and completely automatic firing of gas flow.

19 cl, 3 dwg

Description

Technical field

This invention relates to a method of igniting a gas stream and an electrical circuit for implementing this method, in particular, in gas control valves of a gas heating furnace.

State of the art

There are various possible versions of devices for igniting a gas stream.

US Pat. No. 5,722,823 A describes a device for igniting gases. This ignition device has an electromagnet coil that actuates a gas valve, an ignitor for electric ignition of the gas stream and a remote control that is connected to the electromagnet coil and igniter via a low voltage cable. In this case, the remote control contains a power source and a timing circuit for preparing a low voltage at appropriate times.

This embodiment requires a lot of energy to ignite the gas stream. So, for example, the power supply of three coils is provided, which means a relatively high power consumption. In addition, during the ignition process, an electromagnetic valve is constantly energized, which also entails a high consumption of electric current. To ensure power supply in this case, the option of power supply only from the mains is considered. Another disadvantage is that in the event of malfunctions in the circuit device, a condition is possible that can adversely affect the security of the system as a whole.

From patent document GB 2351341 A, a valve device for controlling the ignition of a gas burner is known. The control rod is manually moved to the ignition position, and the safety automatics valve (safety ignition system) opens. Holding the control rod in this position is only required for a short time, since when the control rod is moved, the microswitch is turned on. The inclusion of a microswitch provides the supply voltage of the mains power supply to hold the electromagnetic plug. The ignition process is carried out by means of a spark of a piezoelectric ignition device. The mains power supply is turned off when the amount of thermoelectric current supplied by the thermocouple becomes sufficient to keep the safety automation valve open.

This solution also has the disadvantage of the need to use a network power supply. In addition, additional costs are required for the implementation of spark ignition by means of a piezoelectric device. There is also a problem in that, in particular, with an increased length of the pipe between the safety automatics valve and the burner hole by the time of ignition, the gas mixture capable of ignition cannot still be present at the burner hole, since the time interval between the moment the valve opens safe ignition systems and ignition timing is relatively short.

DE 9307895 U describes a multifunction valve with a thermoelectric safety device for gas burners in heating installations. For the operation of this multi-function valve, the available voltage of the room electrical network is used. To ignite the gas stream by pressing a button, the electromagnetic valve is excited, and the valve of the gas safety ignition system opens. At the same time, the gas stream is ignited. The thermocouple located in the zone of the flame of the ignited gas is heated, the thermoelectric current generated during this excites the electromagnetic insert. An electromagnet attracts the armature and thus keeps the safety automation valve connected to the armature open. Now the button can be released, the excitation of the electromagnet stops.

In this case, the disadvantage is the need to keep the button pressed until the valve of the safe ignition system is held open due to thermoelectric current.

The disadvantage is that due to the need to maintain for this time the excitation of the electromagnetic valve due to the power supply from the mains, the current consumption is relatively high and, therefore, the power supply from the mains is necessary.

Both solutions described in GB 2351341 A and DE 9307895 U have, in addition, one more drawback: their operation in fully automatic mode is impossible, manual activation is required.

Disclosure of invention

The basis of the invention is the task of creating a method for fully automatic ignition of a gas stream and a circuit device for implementing this method, which has such a low current consumption that, while ensuring a sufficient service life, an integrated voltage source can be used. In addition, the design of the device should be as simple and inexpensive as possible.

According to the invention, the task of creating a method is solved by activating a transistor DC-DC voltage converter, which converts the DC voltage coming from the voltage source into a higher voltage to charge the storage capacitor and the ignition capacitor, which serves to prepare the ignition voltage. The electromagnet of the safe ignition system, known per se, is activated by the holding current supplied by the voltage source, and at the same time, the electric circuit between the electromagnet of the safe ignition system and the thermocouple, which is affected by the gas flame, is interrupted by the relay. Then, by means of a switching element, a stepwise discharge of the storage capacitor is generated, and a current pulse is generated for short-term excitation of the electromagnet in order to open the valve of the safe ignition system and simultaneously actuate the armature of the electromagnet of the safe ignition system. Thanks to the electromagnet of the safe ignition system activated by the holding current, the armature is kept in this position after actuation, and by means of the ignition electrode connected to the ignition system capacitor through the ignition transformer in a known manner, an ignition spark is generated to ignite the outgoing gas. Then, repeated ignition processes occur, while the ignition system capacitor is charged again, after the charge is produced, a repeated ignition spark is generated. After the set time has elapsed, the ignition process ends. The holding current from the voltage source to the electromagnet of the safe ignition system is interrupted, and the relay again closes the electric circuit between the electromagnet of the safe ignition system and the thermocouple.

Thus, a solution was found by which the above-mentioned disadvantages of the considered prior art were eliminated. Ignition of a gas stream is possible by briefly actuating an electronic control device. In this case, due to only the pulsed actuation of the electromagnet, regardless of the duration of the actuation of the control device, a very small consumption of electric current is obtained. In addition, a voltage source can be used to form an ignition spark, thus eliminating the additional cost of a piezoelectric ignition device.

Additional advantageous embodiments of the invention result from other claims.

For example, a favorable option is the case if, first, by means of an electronic control device, after activating it to ignite the gas stream, it is checked whether there is a gas flame. With positive information, the ignition process is interrupted, on the contrary, with negative information, the above operations are performed as part of the method.

Further, an advantageous solution to the method is provided if the presence of thermal voltage is measured, and in the absence of thermal voltage, the repeated ignition processes described above begin. In the presence of a confirmed thermal voltage, on the contrary, the ignition process ends. As soon as the thermoelectric current calculated by the electronic unit based on the measured thermal voltage becomes sufficient to hold the armature on the electromagnet of the safe ignition system, the holding current supplied from the voltage source to the electromagnet of the safe ignition system is interrupted and the electric circuit between the electromagnet of the safe ignition system and the thermocouple is closed again. .

It is also acceptable that the charge of the storage capacitor and the ignition capacitor is relatively simple up to various voltages by means of a DC voltage converter designed for them.

In addition, a favorable solution to the method is provided if a higher AC voltage is produced from the DC voltage of the voltage source, when an active generator is used instead of the DC voltage converter, and the storage capacitor is connected to the first stage of the multistage device connected after the active generator , only at the beginning of the ignition process, after which the storage capacitor and is electrically connected to the second stage is much Cadenet ignitor system capacitor charged by a high voltage alternating current through the cascaded device is set to a higher DC voltage values. After reaching the specified higher DC voltages, the active generator is turned off, and when starting the repeated firing processes, it turns on again.

To further reduce the current consumption, which is a particularly favorable factor if the voltage source consists of a battery, which in size can be made so small that it can be placed together with the electronic control device in the receiver housing of the remote device, the current holding the armature coming from the voltage source can flow through the electromagnet of the safe ignition system and the relay, moreover, by the time the electrical circuit is closed between the electric Agnita ignition locking and thermocouple briefly generated additional current to reliably prevent the letting go of the armature when switching relays for a short-term interruption of the current in the intermediate position of the switching contacts of the relay.

On the other hand, it is also permissible that the voltage of the holding current supplied to the electromagnet of the safe ignition system from the voltage source is converted by means of an additional converter of DC voltage into the voltage of the millivolt range.

It is further preferred that the presence of thermal voltage be measured by means of an analog amplifier.

To increase the reliability of the method, for example, in the event of an emergency, an operation is used which consists in the fact that after a certain period of time, the excitation of the electromagnet of the safe ignition system by means of a voltage source is additionally interrupted by several independent disconnect devices connected in series and time-controlled.

To ensure, if possible, a short period of time between the first ignition process and repeated ignition processes, for reasons of energy saving, it is advantageous if the storage capacitor is disconnected from the cascades before additional cyclic processes of charging the ignition capacitor.

With regard to the electrical circuit, the objective of the invention is solved by a combination of features set forth in paragraph 12 of the claims. Advantageous and additional embodiments of the invention are given in the respective dependent claims.

Brief List of Drawings

The method and electrical circuit according to the invention for igniting a gas stream are explained further on the example of execution. The individual drawings show:

Figure 1 - Electrical diagram.

Figure 2 - Detailed image of the oscillator.

Figure 3 - Detailed image of an analog amplifier.

The implementation of the invention

Shown in figure 1, an exemplary diagram of a device according to the invention for implementing the method of ignition of a gas stream is installed in gas control valves. This gas control valve is a switching and control device, which is designed primarily for installation in a gas-heated oven with natural draft or a similar object. It provides control of the burner and control of the burner, thus controlling the amount of gas entering the burner. Along with blocks that are not essential for the invention and therefore not shown in this embodiment, the gas distribution valves have an ignition torch 1 and a valve 2 of the safe ignition system. The design and function of the pilot burner 1 and valve 2 of the safe ignition system are known to those skilled in the art, and therefore are not explained in detail here.

To control the system as an electronic control unit, a microprocessor module not shown is used, which in this embodiment, together with the voltage source 10, is also located in a housing of the receiving part of the remote control that is not shown separately and is independent of the application. As the voltage source 10 are used, as shown in the drawing, standard commercial batteries, in this case, size R6.

The oscillator 11, described in more detail below, which can be controlled through port J by means of a microprocessor module, is connected to a voltage source 10. Behind it, a cascade device 12/13 is included, which serves to control and power the series-connected storage capacitor C1 and to control and power the series-connected ignition capacitor C2. Since the voltage required to charge the storage capacitor C1 is much less than the voltage required to charge the ignition capacitor C2, the cascade device 12/13 is multi-stage.

In this case, the first stage 12 of the cascade serves to control and power the storage capacitor C1, which is connected behind the cascade. Behind it, in turn, is turned on an electromagnet 5, which, as schematically shown in the image, serves to actuate the known valve 2 of the safe ignition system. Moreover, due to only a short-term load, a magnet with reduced parameters with respect to thermal indicators, the so-called pulsed magnet 5, is sufficient.

The second stage 13 of the cascade serves to control and power the ignition capacitor C2 included behind it, which is part of the ignition device that is known and therefore not explained in more detail here. The ignition capacitor C2 can be controlled for ignition via port C with a microprocessor module. Further, the second stage 13 of the cascade is connected to the voltage control element 14. At the same time, element 14 serves to limit the occurring maximum voltage in order to prevent the destruction of structural elements. In this case, you can abandon additional voltage control for the storage capacitor C1, since after the charge of the ignition capacitor C2, it can also be assumed that the charge of the storage capacitor C1 has occurred. Port D is used to transmit feedback signals to the microprocessor module.

Figure 2 shows a detailed diagram of the used oscillator 11. The oscillator 11 consists of a well-known specialists logic circuit CMOS 15 with the number of logical elements at least four. These logic elements can be "NOT-OR", "NOT-AND" elements, simple inverters or others. Behind them is a power amplification stage 16 with complementary field-effect transistors, to which an LC series oscillatory circuit consisting of an L1 coil and an RF capacitor is connected C3. For feedback and phase control, the so-called phase shifter 19 uses an RC link.

As shown in FIG. 1, the safety ignition system electromagnet 6 connected to the valve 2 of the safe ignition system is connected to the thermocouple 4. This circuit also has an NC contact of the monostable relay 17, in the excited state this circuit is open, and through the electromagnet 6 of the safety system During ignition, current flows from a voltage source consisting of batteries. For this, a switching element, in this case, transistor T1, which can be controlled by a microprocessor module through port G, is connected on one side to a voltage source 10 and, on the other hand, to relay 17. In addition to relay 17, resistor R1 is additionally connected, since the holding current required for electromagnet 6 of the safe ignition system, exceeds the current flowing through the relay 17. In addition, in this electric circuit there are two series-connected time-controlled devices 18 of the safety shutdown, which connected to the microprocessor by the control module via port N and M.

Between the relay 17 and the safety shutdown devices 18, two additional switching elements, a transistor T2 and a transistor T3, are connected to this electrical circuit. While the transistor T2, in front of which the resistor R3 is connected, is connected to the negative pole of the voltage source 10 and can be controlled by the microprocessor module through port F, the transistor T3 is connected to the positive pole of the voltage source 10 and can be controlled from the microprocessor module through port E.

In addition, an analog amplifier 20 is included in parallel with thermoelement 4 in the circuit. The task of this analog amplifier 20 is to measure the DC voltage in the millivolt range created by thermoelement 4, to amplify it and convert it to voltage with a value suitable for processing by a microprocessor module. Since conventional DC amplifiers in such cases require, on the one hand, additional auxiliary voltage exceeding the operating voltage, and, on the other hand, there are deviations due to drift, for example, due to temperature influence, analog amplifier 20 is an AC voltage amplifier .

The following describes the analog amplifier shown in figure 3.

Field effect transistor T4, controlled by a microprocessor module through port L, and resistor R2 form a controlled voltage divider. For this voltage divider, a preamplifier V1 and an additional amplifier V2 with coupling capacitors C4 / C5, respectively, are included.

On the preamplifier V1, a reference potential is formed by means of a positive voltage pole to eliminate onboard voltage deviations. On the contrary, on the additional amplifier V2, the reference potential is formed by the mass potential. Both amplifiers V1, V2 and trigger TR are introduced into the operating mode by the microprocessor module through port K, since in order to save energy they are taken out of operation until the need for their operation appears. The trigger TR, which is connected behind the additional amplifier V2, is, in turn, connected to the microprocessor module via port I.

To implement the method by means of a remote control device, a ignition command is issued to the microprocessor module. By means of an analog amplifier 20 activated through port K, it is checked whether thermal voltage is present on thermocouple 4, the corresponding information is transmitted through port I to the microprocessor module. In the presence of thermal voltage, which is equivalent to the presence of a burning pilot flame, the ignition process is interrupted; in the absence of thermal voltage, the voltage divider of the analog amplifier 20 is controlled by a microprocessor module. By means of a single switching on of the voltage divider, the DC voltage existing at this time on the thermocouple 4 is converted into an alternating voltage pulse. This pulse is supplied through the coupling capacitor C4 to the preamplifier V1. The signal coming from the preamplifier V1 through the coupling capacitor C5 is supplied to the additional amplifier V2 and is amplified again. The analog signal coming from the additional amplifier V2 is converted by the TR trigger into a digital signal in accordance with the set trigger points, as shown in the diagram in Fig. 3.

The diagram shows the voltage characteristic U / t. By means of the trigger TR, when the pulse signal IS is supplied, the first trigger point TR1 is set at a given voltage level SE at time TL, and when the voltage of the pulse signal IS drops, the second trigger point TR2, which corresponds to the time point TE. The time interval between both points in time TL and TE is a measuring signal MS.

The measurement signal MS obtained in this way from the existing thermal voltage is fed through port I to the microprocessor module for evaluation. In this case, the duration of the measuring signal is directly proportional to the thermal voltage present on the thermocouple 4.

In the presence of thermal stress, i.e. with an already burning ignition flame, the ignition process is interrupted, in the absence of thermal voltage, a self-oscillator 11 is activated through port J, and through port A the storage capacitor C1 is connected to the first stage 12 of the multi-stage device.

When activating the oscillator 11, the oscillatory circuit begins to oscillate through the feedback link, i.e. the oscillatory circuit enters self-oscillation mode and determines the frequency of the self-oscillator 11. Thus, the output of the self-oscillator 11 has an AC voltage that is many times higher than the low DC voltage at the input, determined by the batteries of the voltage source. Using this AC voltage and both stages 12 and 13 of the multi-stage device, the storage capacitor C1 and the ignition capacitor C are charged until the element 14, which is designed to control the voltage and limit the maximum voltage that arises, is activated and sends a signal through port D to the microprocessor module, which then disconnects the oscillator 11 through port J.

In conclusion, time-controlled tripping safety devices 18 are activated through port M, and transistor T1, controlled through port G, supplies the safe ignition system electromagnet 6 with a holding current from voltage source 10, and relay 17 is energized, thus opening an electrical circuit between the electromagnet 6 of the safe ignition system and the thermocouple 4.

By then controlling the port B next, the storage capacitor C1 is discontinuously discharged. After that, through port A, the storage capacitor C1 is disconnected from the stage 12 of the cascade. The pulse magnet 5 is briefly excited by this current pulse, and the pusher 7 moves against the force of the locking spring 8 until the armature 3 touches the electromagnet 6 of the safe ignition system. Due to the flow of the holding current, the armature 3 is held in this position and thus the valve 2 of the safe ignition system is in the open state. Gas may flow through the gas control valve to the pilot burner 1.

In the event of an emergency, for example, in the event of a failure of one of the structural elements or for another reason, after a certain period of time has elapsed, the excitation of the electromagnet 6 of the safe ignition system by means of the voltage source 10 is further interrupted by one or more independent safety shutdown devices 18 connected in series and time-controlled , valve 2 of the safe ignition system does not remain in the open state, but closes by means of ruins 8.

An ignition device is activated through port C with a microprocessor module, the ignition capacitor C2 is discharged, and an ignition spark jumps through the ignition electrode 9, so that the outgoing gas is ignited. After the set time has elapsed, in this example approx. 1 second, analog amplifier 20 is activated through ports K and L, and a check is made to see if thermocouple 4 already has a detectable voltage due to the starting heating by a burning ignition flame, i.e. voltage of at least approx. 1 mV.

If this does not happen, repeated ignition processes begin, while, as described above in detail, the self-oscillator 11 is activated, the ignition capacitor C2 is charged, and as a result of a repeated ignition spark, it is discharged again. In this case, when performing these repeated ignition processes in order to save power, the storage capacitor C1 remains disconnected from the stage 12 of the cascade, since the further charge of the storage capacitor C1 is no longer required.

If gas ignition does not occur within the set time, the microprocessor module ends the ignition process.

In the presence of a minimum voltage, the repeated ignition processes, of course, do not start, and a further check of the available open circuit voltage of the thermocouple 4 is performed until the current calculated by the electronic unit based on this voltage reaches the holding current of the electromagnet 6 of the safe ignition system. After that, the analog amplifier 20 is deactivated through port K, and the current coming from voltage source 10 to electromagnet 6 of the safe ignition system is interrupted through port G. The excitation of the relay 17 stops, the switching contacts of the relay 17 close the electrical circuit between the thermocouple 4 and the electromagnet 6 of the safe ignition system. Anchor 3 is now held by thermoelectric current.

To exclude the release of the armature 3 due to the occurrence of a short interruption in the holding current when switching the switching contacts of the relay 17, the transistor T2 is activated briefly through the port E and the resistor R3 also briefly receives an additional current that reliably prevents the aforementioned release of the armature.

If it is necessary to turn off the gas control valves from the remote control, a shutdown command is issued to the microprocessor module. When briefly activating port G and port E by bypassing the safety shut-off devices 18 and the electromagnet 6 of the safe ignition system, a current pulse is sent through the relay 17, so that its switching contacts are lifted. Due to this, the holding current flowing between the thermocouple 4 and the electromagnet 6 of the safe ignition system is interrupted. The armature 3 is no longer held by the electromagnet 6 of the safe ignition system, and under the action of the locking spring 8, the valve 2 of the safe ignition system closes. The gas supply to the ignition burner 1 and, of course, also to the main burner not shown, is interrupted and the gas flame goes out.

The method and circuitry for implementing the method according to the invention, of course, are not limited to the presented embodiment.

On the contrary, various changes, variations and combinations are possible without departing from the scope of the invention.

So, it is understood that the transmission of control signals, as is well known for remote controls, can also be carried out using infrared light, ultrasound, radio waves, etc. In addition, you can not use a remote control device, and place all the necessary structural elements on the device of the gas fittings of the distribution system or in the device. It is also possible that there is only a main burner with direct ignition. Instead of batteries as a voltage source 10, it is possible to use a small-sized network power supply, which is installed in this case in the most favorable way.

Claims (19)

1. A method of igniting a gas stream, characterized in that by means of an electronic control device, after its activation, a device for converting a DC voltage is activated to ignite the gas stream, which converts the DC voltage supplied from the voltage source (10) to a higher voltage, the storage capacitor (C1) and the ignition capacitor (C2) used to prepare the ignition voltage are charged with a higher voltage, the electromagnet (6) of the safe ignition system is activated by means of a holding current supplied by the voltage source (10), and at the same time, by means of the relay (17), the electric circuit between the electromagnet (6) of the safe ignition system and the thermocouple (4) is interrupted the storage capacitor (C1) is discontinuously discharged by a switching element, and a current pulse is generated which serves to briefly excite the electromagnet (5) in order to open the valve (2) of the safe ignition system and at the same time actuate the armature (3) of the electromagnet (6) safe ignition systems, and the anchor (3) due to the activated holding current of the electromagnet (6) of the safe ignition system, after being actuated, is held in this position, by means of the ignition electrode (9) connected to the ignition capacitor (C2) through the ignition transformer, a spark is generated in a known manner to ignite the escaping gas, carry out repeated ignition processes, while again charging the ignition capacitor (C2), after the charge has occurred, a new spark is produced. after the set time has elapsed, the ignition is completed, The holding current from the voltage source (10) to the electromagnet (6) of the safe ignition system is interrupted, and by means of the relay (17) the electric circuit between the electromagnet (6) of the safe ignition system and the thermocouple (4) is closed again. 2. The method according to claim 1, characterized in that by means of an electronic control device after activating it to ignite the gas stream, it is checked whether the gas flame is on, and if the information is positive, the ignition process is interrupted. 3. The method according to claim 1, characterized in that the presence of thermal voltage is measured, and in the absence of thermal voltage, repeated ignition processes are carried out, while again charge the ignition capacitor (C2), after the charge is completed, a repeated ignition spark is made, on the contrary, with the existing thermal voltage, the ignition is terminated, the voltage from the source (10) of the voltage to the electromagnet (6) of the safe ignition system is interrupted, and the electrical circuit between the electromagnet (6) of the safe ignition system and the thermocouple (4 ) again close by means of a relay (17), as soon as the thermoelectric current calculated from the existing thermal voltage becomes sufficient to hold the armature (3) on the electromagnet (6) of the safe ignition system a. 4. The method according to one of claims 1 to 3, characterized in that the storage capacitor (C1) and the ignition capacitor (C2) are charged in each case by means of a DC voltage converter designed for them. 5. The method according to one of claims 1 to 3, characterized in that from a DC voltage coming from a voltage source (10), a higher AC voltage is produced, and instead of a DC voltage converter, an oscillator (11) is used, the storage capacitor (C1) is connected to the multistage device connected after the first stage (12) of the first stage (12) and charged to a predetermined higher DC voltage, an ignition capacitor (C2) connected electrically to the second stage (13) of the multi-stage device is charged to a predetermined higher DC voltage. 6. The method according to claim 5, characterized in that after reaching the specified higher DC voltages, the oscillator (11) is turned off, and at the beginning of repeated ignition processes, it is turned on again. 7. The method according to one of claims 1 to 3, characterized in that the holding current supplied from the voltage source (10) for holding the armature (3) simultaneously flows through the electromagnet (6) of the safe ignition system and relay (17), and that by the time the circuit is closed between the electromagnet (6) of the safe ignition system and the thermocouple (4), an additional current is briefly generated by the relay (17). 8. The method according to one of claims 1 to 3, characterized in that the holding current voltage supplied to the electromagnet (6) of the safe ignition system from the voltage source (10) is converted to a DC voltage in the millivolt range. 9. The method according to claim 3, characterized in that the presence of thermal voltage is measured using an analog amplifier (20). 10. The method according to one of claims 1 to 3, characterized in that, for safety, after a certain period of time, the excitation of the electromagnet (6) of the safe ignition system is forcibly interrupted by means of a voltage source (10) using one or several connected in series and time-controlled devices (18) safety shutdown. 11. The method according to claim 5, characterized in that when following the first ignition process, repeated ignition processes before charging the ignition capacitor (C2), the storage capacitor (C1) is disconnected from the cascade (12). 12. The method according to claim 6, characterized in that when following the first ignition process, repeated ignition processes before charging the ignition capacitor (C2), the storage capacitor (C1) is disconnected from the cascade (12). 13. An electrical circuit for implementing a method of ignition of a gas stream, comprising a DC voltage converter connected to a voltage source (10), a storage capacitor (C1) connected behind the DC voltage converter connected to an electromagnet (5) to actuate the valve (2) of the safe ignition system, and an ignition capacitor (C2), which is connected in a known manner through an ignition transformer to an ignition electrode (9) , an electromagnet (6) of the safe ignition system, which is connected via a relay (17) to either a voltage source (10) or a thermocouple (4), at least one safety shutdown device (18) installed between the voltage source (10) and the electromagnet (6) of the safe ignition system, the element (4) for measuring the voltage of the thermocouple, and the elements to be controlled are connected via the ports intended for them to the electronic control device . 14. The electric circuit according to claim 13, characterized in that the storage capacitor (C1) has a voltage control and limiting element (14) designed for it, as well as a DC voltage converter for it. 15. The electric circuit according to item 13, wherein the ignition capacitor (C2) has an element (14) for monitoring and limiting voltage, and a DC / DC converter for it. 16. The electrical circuit according to 14 or 15, characterized in that instead of a DC-DC voltage converter, a self-oscillator (11) is connected to a voltage source (10), behind the oscillator (11) included cascade device (12/13), Behind the cascade device (12/13), an element (14) for monitoring and limiting voltage is installed. 17. The electrical circuit according to 14, characterized in that the oscillator (11) consists of a CMOS circuit (15), which has at least four logic elements formed as “NOT-OR” or “NOT-AND” logic elements or simple inverters, and of which at least one logic element is connected in front of other parallel-connected logic elements, or from several CMOS circuits, a power amplification stage 16 with complementary field-effect transistors, an LC oscillatory circuit (L1 / C1) connected behind it, and RC link serving as ETS phase regulator (19). 18. An electrical circuit according to one of claims 13-15 or 17, characterized in that the element for measuring the voltage of the thermocouple (4) is an analog amplifier (20). 19. The electrical circuit according to p. 18, characterized in that the analog amplifier (20) is an AC voltage amplifier, in front of which is included a synchronous voltage divider.

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