RU2190161C2 - Gas electric kindling device - Google Patents

Abstract

FIELD: pulse engineering; gas kindling in domestic gas appliances. SUBSTANCE: device has first electric circuit of series-connected capacitor, first diode, and first resistor; second electric circuit of series-connected second capacitor and second resistor; control button with set of normally closed contacts that function to short out second electric circuit; second diode; pulse transformer; spark gap connected to high-voltage winding turns of pulse transformer; and semiconductor switch. First and second electric circuits are connected to movable normally closed contact lead in control button; anode of second diode is connected to fixed normally closed contact lead of control button and its anode, to control lead of semiconductor switch. EFFECT: enhanced reliability, simplified design of device. 4 dwg

Description

 The invention relates to a pulse technique and can be used to ignite gas in domestic gas appliances.

 For the prototype of the claimed invention taken device electric ignition of gas, and. from. SU 1335777, MKI 4 F 23 Q 5/00, H 03 K 3/53, publ. 09/07/87, bull. 33.

 The device includes a first circuit of a first capacitor connected electrically in series, a first diode and a first resistor, a second circuit of a second capacitor and a second resistor connected electrically in series, a second diode, and a control button, normally closed contacts of which short circuit the second circuit, a pulse transformer , spark gap connected to the high-voltage winding of a pulse transformer, and a semiconductor switch.

 The disadvantages of the device are the lack of reliability and complexity of the device, due to the complex switching scheme and the use of a control button with several switched groups of contacts.

 The objectives of the invention are to increase the reliability and simplification of the device electric gas ignition.

 These problems are solved in a gas electric ignition device, which includes a first electric circuit from a first capacitor connected in series, a first diode and a first resistor, a second electric circuit from a second capacitor and a second resistor connected in series, a control button with a group of normally closed contacts short-circuiting the second electric circuit, as well as the second diode, pulse transformer, spark gap connected to the turns of the high voltage winding of the pulse transformer as well, and semiconductor switch.

 The problems are solved in that the first and second electrical circuits are connected to the output of the movable normally closed contact of the control button, and the second diode is connected by an anode to the output of the fixed normally closed contact of the control button, and by the cathode to the control output of the semiconductor key.

 The proposed change in the circuit allows to reduce the number of switched contact groups, apply the control button of a simpler, more reliable and cheaper design, simplify wiring and reduce the cost of gas electric ignition devices.

 The invention is illustrated by the following drawings.

 In FIG. 1 shows a schematic diagram of an electric ignition device.

 In FIG. 2-4 depict embodiments of the inventive device.

 The invention can be implemented in a gas electric ignition device (see Fig. 1), which includes a control button 1 with a movable contact 2, a normally closed contact 3 and a normally open contact 4, a pulse transformer T1 with low and high voltage windings W1, W2, spark spark gap 5 connected in parallel to the turns of the high-voltage winding W2 of transformer T1, the first electric circuit made up of the first capacitor C1, the first diode VD1 and the first resistor R1 connected in series, the second electric circuit l from the second capacitor C2 and the second resistor R2 connected in series, connected to the contacts 2, 3 of the control button 1, as well as the second diode VD2 and the semiconductor switch 6.

 To implement the invention, the first and second electrical circuits are connected at one end to the output of the movable contact 2 of the control button 1, and the second diode VD2 is connected by the anode to the output of the fixed normally closed contact 3 of the control button 1, and the cathode to the control terminal of the semiconductor switch 6.

 It should be noted that the connection of the diode VD1 and the resistor R1 in the first circuit can be performed as in the circuits shown in FIG. 1, 3, and according to the schemes shown in FIG. 2, 4, and the connection of the resistor R2 and capacitor C2 can be performed as in the schemes shown in FIG. 1, 2, and according to the schemes shown in FIG. 3, 4. The indicated connection options do not affect the operation of the gas electric ignition device.

 As a semiconductor key 6 can be used a thyristor.

 The work of the proposed device does not differ from the work of the prototype.

 The device operates as follows.

 When you press the control button 1, for example, in the negative half-cycle ("-" at pole 8), the capacitor C2 is charged to a voltage close to the amplitude, along the circuit: pole 7 of the voltage source-contacts 4, 2 buttons 1 of the control capacitor C2-resistor R2- diode VD2-control output of the semiconductor switch 6-low-voltage winding W1 of the transformer T1-capacitor C1-pole 8 voltage source. The capacitor C1 is also charged to a voltage, for example, an order of magnitude lower charge voltage of the capacitor C2, since it has a much larger capacity, and by the end of the second half-cycle it is discharged to the network through the diode VD1 and the resistor R1.

 In the positive half-cycle, capacitor C1 is charged through the diode VD1 and resistor R1 to a voltage close to the amplitude value. An algebraic sum of the mains voltage and the charged capacitors C1, C2 is applied to the VD2 diode.

 At the beginning of the negative half-cycle, the diode VD2 opens and forms a charge circuit of the capacitor C2 from the capacitor C1 and the network through the diode VD2, the resistor R2 and the control terminal of the semiconductor switch 6 (thyristor). The latter is turned on, and the capacitor C1 is discharged to the winding W1, exciting a high-voltage pulse on the winding W2 and creating an electric spark discharge through the electrodes of the spark gap 5.

 When the next positive half-cycle occurs, the capacitor C1 is again charged to a voltage close to the amplitude value, accumulating energy for the next discharge. Since the capacitor C2 received a metered charge in the previous negative half-cycle and the voltage on it increased, the VD2 diode and, accordingly, the key 6 (thyristor) do not open at the beginning of the next negative half-cycle, but somewhat later, providing the next high-voltage discharge at the device output.

 This process is repeated during the first half of each negative half-cycle until the capacitor C2 is charged to a voltage when the charging current of the capacitor C2 is reduced so that it cannot turn on switch 6.

 To resume discharges, release control button 1. After that, the capacitor C2 is discharged through the normally closed contacts 2, 3 of the control button 1 and the resistor R2.

Claims (1)

 A gas electric ignition device comprising a first electrical circuit from a first capacitor connected in series, a first diode and a first resistor, a second electrical circuit from a second capacitor and a second resistor connected in series, a control button with a group of normally closed contacts short-circuiting a second electrical circuit, a second diode , pulse transformer, spark gap connected to the turns of the high voltage winding of the pulse transformer, and a semiconductor switch, distinct scheesya in that the first and second electrical circuits are connected to the movable terminal normally closed contact of the control button, and the second diode anode is connected to the fixed terminal a normally closed contact of the control button, and the cathode - to the control terminal of the semiconductor switch.

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