JPH09322563A - High voltage generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate sparks between discharge electrodes continually and realize a simple circuit, by a method in which a timer unit turns on a switching device at a 1st predetermined time and turns on the switching device at a 2nd predetermined time. SOLUTION: A switch 6 is closed. When the output level of a comparator 15 in a timer unit 14 is low, a power supply unit 2 charges a capacitor 10 through a resistor 11 and a diode 12. When the output level of the comparator 15 in the timer unit 14 is high, a switching device 13 is turned on and the charge stored in the capacitor 10 is discharged through a high voltage transformer 4 and a voltage high enough for a spark discharge is generated by the high voltage transformer 4 and a spark is generated. That is, the timer unit 14 turns on the switching device 13 at a 1st predetermined time and turns off the switching device 13 at a 2nd predetermined time and repeats this procedure. With this constitution, sparks can be generated between the discharge electrodes of the high voltage transformer 4 continually.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high pressure generator for igniting gas, kerosene or the like.

[0002]

2. Description of the Related Art Conventionally, as a high-pressure generating device of this type, for example, those shown in FIGS. 7 and 8 have been proposed. The configuration will be described below.

As shown in FIG. 7, a switch 1 charges a capacitor 3 from a power source unit 2 such as a dry battery and discharges an electric charge stored in the capacitor 3 through a high voltage transformer 4. When connected, the power supply unit 2 and the capacitor 3 are connected to charge the capacitor 3.

When the switch 1 is connected to the contact B, the electric charge accumulated in the capacitor 3 is transferred to the high voltage transformer 4.
Is discharged through the high voltage transformer 4, and the voltage is increased to a voltage capable of spark discharge by the high voltage transformer 4 to perform ignition.

Further, as shown in FIG. 8, the oscillator 5 oscillates while the switch 6 is turned on to boost the voltage of the power supply 2, and the current rectified by the diode 7 is stored in the capacitor 8
To charge. Then, when the voltage of the capacitor 8 reaches a predetermined voltage, the switch 9 is turned on, the electric charge accumulated in the capacitor 8 is discharged through the high voltage transformer 4, and the high voltage transformer 4 boosts the voltage to a spark dischargeable voltage and ignites. To do.

[0006]

However, in the structure as shown in FIG. 7, a spark is generated between the discharge electrodes only when the switch 1 is switched from the contact A to the contact B, so if the ignition does not occur again. It was necessary to change the switch 1.

Further, the structure as shown in FIG. 8 has the problems that the circuit becomes complicated and the cost becomes high due to the oscillation section 5.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an inexpensive high-voltage generator that continuously generates a spark between discharge electrodes and has a simple circuit.

[0009]

In the high voltage generator of the present invention, the capacitor is charged by the power supply unit and the timer unit turns on the switch for a first predetermined time and then for a second predetermined time to charge the capacitor. The electric charge is discharged, and the discharge current of the capacitor is caused to flow through the booster to boost the voltage.

As a result, a spark can be continuously generated between the discharge electrodes, and an inexpensive high-voltage generator can be provided with a simple circuit.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is such that a capacitor, a power supply unit for charging the capacitor, a switch for discharging the charge of the capacitor, and a discharge current for the capacitor are supplied. A booster for boosting pressure and a timer for counting time are provided. The timer is for turning on the switch for a first predetermined time and turning it off for a second predetermined time. Since the operation of turning on and turning off for the second predetermined time is repeated, a spark can be continuously generated between the discharge electrodes, and an inexpensive high voltage generator can be provided with a simple circuit.

According to a second aspect of the present invention, in the invention according to the first aspect, when the switch is turned on and the discharge current of the capacitor flows to the boosting section, the direct current from the power source section is increased. A second switch for preventing the current from flowing into the discharge electrode, which can continuously generate a spark between the discharge electrodes, and can provide an inexpensive high-voltage generator with a simple circuit. When the discharge current of 1 flows into the booster, saturation of the magnetic flux in the booster due to the direct current from the power supply can be suppressed, and a powerful spark can be generated.

According to a third aspect of the present invention, in the above-mentioned first or second aspect of the invention, a plurality of capacitors, a switch for discharging the charge of these capacitors, and a plurality of time measuring devices are provided. It is provided with a timer unit and a third switch unit that connects the plurality of capacitors in parallel during charging and connects in series during discharging, and continuously generates a spark between the discharge electrodes and simplifies the operation. It is possible to provide an inexpensive high-voltage generator with a circuit, rapid charging is possible, and when discharging a capacitor, a plurality of capacitors are connected in series and discharged, so that a high voltage can be applied to the booster, It can generate powerful sparks.

The invention according to claim 4 of the present invention is the invention according to any one of claims 1 to 3, wherein the charging time of the capacitor is longer than the discharging time, and sparks are continuously applied between the discharge electrodes. It is possible to provide an inexpensive high voltage generator with a simple circuit and to reliably charge even if the charging time constant of the capacitor is increased. The battery life can be extended when a dry battery is used for the part.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

(Embodiment 1) As shown in FIG. 1, a capacitor 10 has a resistor 11 for current limiting and a diode 12 for rectification connected in series and connected to a power supply unit 2 through a switch 6, It is charged and stores an electric charge. The switch 13 discharges the electric charge charged in the capacitor 10 through the high-voltage transformer (step-up unit) 4, and uses a transistor.

The timer unit 14 turns on the switch 13 for a first predetermined time and turns it off for a second predetermined time, and includes a comparator 15, a plurality of resistors 16 to 21, diodes 22 to 23, and a capacitor 24. It is configured. Create a reference voltage with resistors 16-18, and use comparator 1
A hysteresis is added at the same time as inputting to the plus side of 5. In addition, 21 is a resistance for current limitation, and the diodes 22 and 23 are for rectification.

The timer unit 14 turns off the switch 13 and charges the capacitor 10 for a first predetermined time.
It is set longer than the second predetermined time for turning on the switch 13 and discharging the capacitor 10.

In the above structure, first, the operation of the timer section 14 will be described with reference to FIG. 2. When the output of the comparator 15 is high, the resistor 20 and the diode 23 are provided.
Through which the capacitor 24 is charged. One end of the capacitor 24 is input to the negative side of the comparator 15,
As the charging of the capacitor 24 progresses, the comparator 15
The voltage on the negative side of rises as shown in Fig. 2 (a),
When the voltage on the plus side is exceeded, the output of the comparator 15 changes from high to low, as shown in FIG.

As a result, the electric charge of the capacitor 24 is discharged through the diode 22 and the resistor 19, and the comparator 15
The voltage on the minus side of the voltage drops as shown in FIG. 2A, but the value of the resistor 19 is much larger than that of the resistor 20. The output is low for a long time. When the output of the comparator 15 is high, the switch 13 is turned on.

The switch 6 is closed and the timer unit 14
Is low (that is, the output of the comparator 15), the power supply unit 2 charges the capacitor 10 via the resistor 11 and the diode 12. When the output of the timer unit 14 changes to high, the switch 13 is turned on, the electric charge accumulated in the capacitor 12 is discharged through the high voltage transformer 4, and the high voltage transformer 4 boosts the voltage to a spark dischargeable voltage and ignites.

Since the timer unit 14 repeats the operation of turning on the switch 13 for the first predetermined time and turning it off for the second predetermined time, it is possible to continuously generate a spark between the discharge electrodes of the high-voltage transformer 4, An inexpensive high voltage generator can be provided with a simple circuit. Also, the timer unit 14
Since the first predetermined time for turning off the switch 13 and charging the capacitor 10 is longer than the second predetermined time for turning on the switch 13 and discharging the capacitor 10, the charging time constant of the capacitor 10 is increased. Even if the battery is reliably charged, the charging current can be reduced, and the battery life can be extended when a dry battery is used for the power supply unit 2.

(Embodiment 2) As shown in FIG. 3, the second switch 25 is composed of a transistor and is turned off when the output of the timer section 14 is high and turned on when the output is low.
When the switch 13 is turned on and the discharge current of the capacitor 10 flows through the high voltage transformer 4, the direct current from the power supply unit 2 is prevented from flowing through the high voltage transformer 4. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. When the switch 6 is closed and the output of the timer section 14 is low, the switch 25 is on and the switch 13 is off.
The capacitor 10 is charged by the power supply unit 2 via the switch 25 and the resistor 11.

Then, as in the first embodiment, when the output of the timer section 14 changes to high, the switch 25 is turned off and the switch 13 is turned on, and the electric charge stored in the capacitor 10 is discharged through the high voltage transformer 4. The high voltage transformer 4 raises the voltage to a voltage that enables spark discharge and ignites.

As described above, by the second switch 25,
Since the DC component from the power supply unit 2 can be cut off when the capacitor 12 is discharged, it is possible to suppress saturation of the magnetic flux of the high-voltage transformer 4 and generate a powerful spark.

(Third Embodiment) A third embodiment of the present invention will be described below with reference to the drawings. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 4, capacitors 27, 28
Are connected in series with the current limiting resistors 29 and 30 and the rectifying diodes 31 and 32, respectively, and are connected to the power supply unit 2 through the switch 6, and are charged by the power supply unit 2 and store electric charges. The third switch 33, 34 is connected to the capacitor 2
7, 28 are connected in parallel at the time of charging and connected in series at the time of discharging, and are composed of transistors, which are turned on and off through resistors 36, 37 by the outputs of the timer units 14, 35, respectively.

The switch 38 is turned on / off by the output of the second timer section 35 to discharge the electric charge charged in the capacitors 27 and 28 through the high voltage transformer 4, and uses a transistor.

The timer section 35 includes a comparator 39,
It is composed of a plurality of resistors 40 to 42. Resistors 40, 41
Since the reference voltage is generated and input to the positive side of the comparator 39 and the output of the timer section 14 is input to the negative side, the timer section 14 and the timer section 35
Outputs contradictory outputs. Reference numeral 42 is a current limiting resistor.

The operation of the above configuration will be described. Since the timer sections 14 and 35, the switch 38 and the third switches 33 and 34 output high and low at the timings shown in FIG. 5, or repeat ON / OFF. When the switch 6 is closed and the output of the timer unit 14 (that is, the output of the comparator 15) is low, the switch 38 is on and the capacitor 2 is connected via the resistor 29 and the diode 31.
7 is charged, and the capacitor 28 is also charged via the resistor 30 and the diode 32.

When the output of the timer section 14 changes to high, the switch 38 is turned off, the third switches 33 and 34 are turned on, the capacitors 27 and 28 are connected in series, and the capacitors 33 and 34 are stored. The generated electric charge is discharged through the high-voltage transformer 4, and the high-voltage transformer 4 boosts the voltage to a voltage capable of spark discharge and ignites.

At this time, when the capacitors 33 and 34 are discharged, the capacitors 33 and 34 are connected in series and discharged, so that a high voltage can be applied to the high voltage transformer 4,
It can generate powerful sparks.

As shown in FIG. 6, the diode 3
The switches 43 and 44 formed of transistors are used instead of the switches 1 and 32, and when the output of the timer unit 14 is high, the switches 43 and 44 are turned off and the capacitors 27 and 2 are used.
When the discharge current of 8 flows through the high voltage transformer 4, the power supply unit 2
It goes without saying that it may be possible to prevent the DC current from flowing to the high-voltage transformer 4.

[0035]

As described above, according to the invention described in claim 1 of the present invention, a capacitor, a power supply unit for charging the capacitor, a switch for discharging the charge charged in the capacitor, and a discharge for the capacitor. It has a booster for boosting current and a timer for timing the time. This timer is designed to turn on the switch for a first predetermined time and turn it off for a second predetermined time. Since the operation of turning on for a predetermined time and turning off for a second predetermined time is repeated, a spark can be continuously generated between the discharge electrodes, and an inexpensive high voltage generator can be provided with a simple circuit.

Further, according to the second aspect of the invention, when the switch is turned on and the discharge current of the capacitor flows to the boosting section, the direct current from the power supply section is prevented from flowing to the boosting section. Since the switch is provided, a spark can be continuously generated between the discharge electrodes and an inexpensive high-voltage generator can be provided with a simple circuit. When the discharge current of the capacitor flows to the booster, the power supply It is possible to suppress the saturation of the magnetic flux in the booster portion due to the direct current from the power source and generate a strong spark.

Further, according to the invention described in claim 3, a plurality of capacitors, a switch for discharging the charges charged in these capacitors, a plurality of timer units for measuring time, and a time for charging the plurality of capacitors. Has a third switch part connected in parallel and connected in series at the time of discharge, so that it is possible to continuously generate a spark between the discharge electrodes and to provide an inexpensive high-voltage generator with a simple circuit, Rapid charging is possible, and when a capacitor is discharged, a plurality of capacitors are connected in series and discharged. Therefore, a high voltage can be applied to the booster, and a powerful spark can be generated.

Further, according to the invention described in claim 4, since the charging time of the capacitor is made longer than the discharging time, a spark is continuously generated between the discharge electrodes, and a simple circuit inexpensively generates a high voltage. The device can be provided and can be reliably charged even if the charging time constant of the capacitor is increased, so the charging current can be reduced and the battery life can be extended when a dry battery is used in the power supply section. be able to.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a high voltage generator according to a first embodiment of the present invention.

FIG. 2 is an operation timing chart of main parts of the high-voltage generator.

FIG. 3 is a circuit diagram of a high voltage generator according to a second embodiment of the present invention.

FIG. 4 is a circuit diagram of a high voltage generator according to a third embodiment of the present invention.

FIG. 5 is an operation timing chart of essential parts of the high-voltage generator.

FIG. 6 is a circuit diagram of another example of the high-voltage generator.

FIG. 7 is a circuit diagram of an example of a conventional high voltage generator.

FIG. 8 is a circuit diagram of another example of the high-voltage generator.

[Explanation of symbols]

 2 Power supply section 4 High voltage transformer (Booster section) 10 Capacitor 13 Switch 14 Timer section

Claims (4)

[Claims] 1. A capacitor, a power supply section for charging the capacitor, a switch for discharging the charge charged in the capacitor, a boosting section for flowing a discharge current of the capacitor to boost the voltage, and a timer section for measuring time. The timer unit is a high-voltage generator in which the switch is turned on for a first predetermined time and turned off for a second predetermined time. 2. The high voltage generator according to claim 1, further comprising a second switch for preventing a direct current from the power source from flowing to the booster when the switch is turned on and the discharge current of the capacitor flows to the booster. apparatus. 3. A plurality of capacitors, a switch for discharging the charges charged in the plurality of capacitors, a plurality of timer units for measuring time, a plurality of the capacitors connected in parallel during charging and connected in series during discharging. The high voltage generator according to claim 1 or 2, further comprising a third switch connected to the. 4. The high-voltage generator according to claim 1, wherein the charging time of the capacitor is longer than the discharging time.