Instantaneous combustion type pulse ignition controller for timing or dry-burning-resistant valve closing of gas cooker

Abstract

The invention relates to an instant-combustion type pulse ignition controller for timing or dry-burning-resistant valve closing of a gas cooker. The instant-combustion type pulse ignition controller comprises a direct-current power supply, an oscillating circuit, a high-voltage generating circuit, a time delay circuit, a voltage inverter, a first suction valve time delay circuit, a second suction valve time delay circuit, a first thermocouple double-coil electromagnetic valve and a second thermocouple double-coil electromagnetic valve, one end of the oscillating circuit is used for being connected with an ignition switch of the gas cooker, the other end of the oscillating circuit is connected with the high-voltage generating circuit, the high-voltage generating circuit outputs high-voltage pulses for igniting the cooker, one end of the time-delay circuit is connected with the high-voltage generating circuit, and the other end of the time-delay circuit is connected with the voltage inverter. The output end of the voltage inverter is connected with a first suction valve time-delay circuit and a second suction valve time-delay circuit which are connected in parallel, and the two thermocouple double-coil electromagnetic valves are controlled to be opened or closed through the two suction valve time-delay circuits. The valve can still be effectively opened under the condition that the negative electrode of the power supply is grounded, and the double functions of opening the valve through instant combustion and simply and reliably closing the valve are achieved.

Description

Technical Field

[0001] This invention relates to a pulse ignition controller specifically designed for timing or anti-dry-burning shut-off valves in gas stoves, belonging to the technical field of pulse ignition controllers for gas stoves. Background Technology

[0002] Currently, the gas stove market uses instant ignition (zero-second valve opening) pulse ignition controllers, which are widely used due to their practicality and good user experience. An instant ignition (zero-second valve opening) pulse ignition controller allows the user to immediately release the igniter after lighting the gas stove. The igniter then outputs a negative signal to the thermocouple solenoid valve, maintaining its engagement for approximately 4-6 seconds. Once the thermocouple is heated by the flame and the solenoid valve is engaged, normal combustion is maintained. Because the voltage generated by the thermocouple installed on the stove after heating is a positive voltage on the outer casing and a negative voltage at the input terminal of the solenoid valve, most instantaneous (zero-second valve opening) pulse ignition controllers use a method where the positive terminal of the igniter power supply is connected to the outer casing of the stove in order to match the phase of the input voltage of the thermocouple solenoid valve. Since the instantaneous (zero-second valve opening) pulse ignition controller uses a method where the positive terminal of the power supply is connected to the outer casing, it is very simple and easy to achieve zero-second valve opening of the gas stove. As long as a negative voltage signal is output by the pulse ignition controller to the input terminal of the thermocouple solenoid valve and maintained for about 4-6 seconds, the gas stove can achieve zero-second valve opening. With the development of the times, in order to meet the needs of different users, many gas stoves with timed valve shut-off and anti-dry-burning valve shut-off functions have been launched on the market. The instant ignition (zero-second valve opening) pulse ignition controller that is matched with this has a great challenge in circuit design because it needs to achieve the dual functions of instant ignition (zero-second valve opening) and reliable shut-off of thermocouple solenoid valve when needed. If the instant ignition (zero-second valve opening) pulse ignition controller still uses the method of connecting the positive terminal of the power supply to the outer casing, then instant ignition (zero-second valve opening) is easy to achieve, but it is difficult to achieve timed valve shut-off or anti-dry-burning valve shut-off. This is because to effectively shut off the thermocouple solenoid valve, a voltage with a completely opposite phase to the voltage generated by the thermocouple solenoid valve during combustion must be applied. That is, a negative voltage must be applied to the outer casing and a positive voltage must be applied to the input terminal of the thermocouple solenoid valve to effectively shut off the thermocouple solenoid valve and cut off the gas supply. If the gas stove casing is already connected to the positive terminal of the power supply, applying a positive voltage signal to the input terminal of the thermocouple solenoid valve will be ineffective because it is in phase and will not close the valve. Conversely, applying a negative voltage signal will only make the solenoid valve more firmly engaged, but will not effectively close it. If the gas stove casing is connected to the negative terminal of the power supply, closing the thermocouple solenoid valve is easy. Although applying a positive voltage pulse signal to the input terminal will reliably close the valve, achieving instantaneous ignition and zero-second valve opening is difficult. This is because the gas stove pulse igniter has only one power supply. With the stove casing connected to the negative terminal, applying a negative voltage to the input terminal of the thermocouple solenoid valve will not be effective due to the lack of phase difference, making it impossible to effectively engage the valve and achieve instantaneous ignition (zero-second valve opening). Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the existing instantaneous ignition pulse ignition controllers are difficult to achieve the dual functions of instantaneous ignition (zero-second valve opening) and reliable shut-off of thermocouple solenoid valve when needed. The present invention provides an instantaneous ignition pulse ignition controller for timed or anti-dry-burn valve shut-off in gas stoves.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: A pulse ignition controller for a timed or anti-dry-burn valve on a gas stove includes a DC power supply, an oscillation circuit, a high-voltage generating circuit, a delay circuit, a voltage inverter, a first suction valve delay circuit, a second suction valve delay circuit, a first thermocouple double-coil solenoid valve, and a second thermocouple double-coil solenoid valve. One end of the oscillation circuit is connected to the ignition switch of the gas stove, and the other end is connected to the high-voltage generating circuit. The high-voltage generating circuit outputs a high-voltage pulse to ignite the stove. One end of the delay circuit is connected to the high-voltage generating circuit, and the other end is connected to the voltage inverter. The output of the voltage inverter is connected to two parallel first suction valve delay circuits and second suction valve delay circuits. The first and second suction valve delay circuits are connected to control the opening or closing of the first thermocouple double-coil solenoid valve and the second thermocouple double-coil solenoid valve, respectively. The DC power supply provides the operating voltage for the above circuits.

[0005] Furthermore, the oscillation circuit consists of diodes D3, D4, and D10, resistors R2 and R3, transistor Q1, capacitor C2, and a first oscillation transformer T1. Diodes D3 and D4 are connected in parallel and then sequentially connected to resistor R2, the first primary coil of the first oscillation transformer T1, and the base of transistor Q1. Capacitor C2 and resistor R3 are connected in parallel between the base and emitter of transistor Q1 in the first oscillation transformer T1. The collector of transistor Q1 is connected to the second-stage coil of the first oscillation transformer T1, and the secondary coil of the first oscillation transformer T1 is connected to rectifier diode D10.

[0006] Furthermore, the high-voltage generating circuit includes a first ignition branch and a second ignition branch connected in parallel, as well as a capacitor C1 and a discharge tube D11. The first ignition branch is formed by connecting a first high-voltage step-up transformer T2 and a diode D1 in series. One end of the first ignition branch is used to connect to the ignition switch K2 of the gas stove, and the other end is connected to the discharge tube D11 and the capacitor C1 in sequence. The second ignition branch is formed by connecting a second high-voltage step-up transformer T3 and a diode D2 in series. One end of the second ignition branch is used to connect to the ignition switch K2 of the gas stove, and the other end is connected to the discharge tube D11 and the capacitor C1 in sequence.

[0007] Furthermore, the delay circuit consists of transistors Q2 and Q3, resistors R4, R5, R6, and R7, capacitor C3, and diodes D5 and D6. One end of resistor R5 is connected to the base of transistor Q2, and the other end is connected between the series-connected resistor R4 and diode D6, and between the series-connected capacitor C3 and diode D5. The emitter of transistor Q2 is connected to the positive terminal of the DC power supply, and its collector is connected to resistor R7. One end of resistor R6 is connected between the collector of transistor Q2 and resistor R7, and the other end is connected to the base of transistor Q3. The emitter of transistor Q3 is grounded, and its collector is connected to a voltage inverter. Furthermore, the first suction valve delay circuit consists of transistors Q7 and Q8, resistors R12, R13, and R14, capacitor C5, and diodes D8 and D13. Resistors R14 and C5 are connected in parallel, with one end connected to the emitter of transistor Q7 and the other end connected to the base of transistor Q7 through resistor R12. They are also connected to diode D8, which is used to connect to ignition switch K1. The collector of transistor Q7 is connected to the base of transistor Q8 through resistor R13. Diode D13 is connected between the emitter and collector of transistor Q8. The collector of transistor Q8 is also connected to the first thermocouple dual-coil solenoid valve W1.

[0008] Furthermore, the second suction valve delay circuit consists of transistors Q5 and Q6, resistors R9, R10, and R11, capacitor C4, and diodes D7 and D12. Resistors R11 and C4 are connected in parallel, with one end connected to the emitter of transistor Q5 and the other end connected to the base of transistor Q6 through resistor R10. It is also connected to diode D7, which is used to connect to ignition switch K2. The collector of transistor Q5 is connected to the base of transistor Q8 through resistor R10. Diode D11 is connected between the emitter and collector of transistor Q6. The collector of transistor Q6 is also connected to the second thermocouple dual-coil solenoid valve W2.

[0009] Furthermore, the voltage inverter consists of resistors R1 and R8, transistor Q4, second oscillation transformer T4, and diode D9. Resistors R1 and R8 are respectively connected across the first primary coil of the second oscillation transformer T4. At the same time, resistor R1 is also connected between the base and emitter of transistor Q4. The collector of transistor Q4 is connected to the second primary coil of oscillation transformer T4. The secondary coil of the second oscillation transformer T4 is connected to both the first and second suction valve delay circuits through diode D9.

[0010] This invention is ingeniously conceived, simple in structure, and low in cost. It can still effectively open the valve even when the power supply is negatively grounded, realizing instant ignition (zero-second valve opening) of gas stoves. This instant ignition (zero-second valve opening) pulse igniter has the dual functions of instant ignition valve opening and simple and reliable valve closing when the power supply is negatively grounded. It can be widely used in the field of instant ignition pulse ignition controller technology for timed or anti-dry burning valve closing of gas stoves. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the circuit structure of the present invention.

[0012] Figure 2 This is the electrical schematic diagram of the present invention. Detailed Implementation

[0013] See Figure 1 and Figure 2 The instantaneous pulse ignition controller for timed or anti-dry-burning shut-off valves of gas stoves, as described in this invention, includes a DC power supply, an oscillation circuit, a high-voltage generating circuit, a delay circuit, a voltage inverter, a first suction valve delay circuit, a second suction valve delay circuit, a first thermocouple double-coil solenoid valve, and a second thermocouple double-coil solenoid valve. One end of the oscillation circuit is connected to the ignition switch of the gas stove, and the other end is connected to the high-voltage generating circuit. The high-voltage generating circuit outputs a high-voltage pulse to ignite the stove. One end of the delay circuit is connected to the high-voltage generating circuit, and the other end is connected to the voltage inverter. The output end of the voltage inverter is connected to two parallel first suction valve delay circuits and second suction valve delay circuits. The first suction valve delay circuit and the second suction valve delay circuit are connected to control the opening or closing of the first thermocouple double-coil solenoid valve and the second thermocouple double-coil solenoid valve, respectively. The DC power supply provides the operating voltage for the above circuits.

[0014] The above-mentioned oscillation circuit consists of diodes D3, D4, and D10, resistors R2 and R3, transistor Q1, capacitor C2, and a first oscillation transformer T1. Diodes D3 and D4 are connected in parallel and then sequentially connected to resistor R2, the first primary coil of the first oscillation transformer T1, and the base of transistor Q1. Capacitor C2 and resistor R3 are connected in parallel between the base and emitter of transistor Q1 in the first oscillation transformer T1. The collector of transistor Q1 is connected to the second-stage coil of the first oscillation transformer T1, and the secondary coil of the first oscillation transformer T1 is connected to rectifier diode D10.

[0015] The aforementioned high-voltage generating circuit includes a first ignition branch and a second ignition branch connected in parallel, as well as a capacitor C1 and a discharge tube D11. The first ignition branch is formed by connecting a first high-voltage step-up transformer T2 and a diode D1 in series. One end of the first ignition branch is connected to the ignition switch K2 of the gas stove, and the other end is connected to the discharge tube D11 and the capacitor C1 in sequence. The second ignition branch is formed by connecting a second high-voltage step-up transformer T3 and a diode D2 in series. One end of the second ignition branch is connected to the ignition switch K2 of the gas stove, and the other end is connected to the discharge tube D11 and the capacitor C1 in sequence.

[0016] The aforementioned delay circuit consists of transistors Q2 and Q3, resistors R4, R5, R6, and R7, capacitor C3, and diodes D5 and D6. One end of resistor R5 is connected to the base of transistor Q2, and the other end is connected between resistor R4 and diode D6 (connected in series), and between capacitor C3 and diode D5 (connected in series). The emitter of transistor Q2 is connected to the positive terminal of the DC power supply, and its collector is connected to resistor R7. One end of resistor R6 is connected between the collector of transistor Q2 and resistor R7, and the other end is connected to the base of transistor Q3. The emitter of transistor Q3 is grounded, and its collector is connected to a voltage inverter. The aforementioned first suction valve delay circuit consists of transistors Q7 and Q8, resistors R12, R13, and R14, capacitor C5, and diodes D8 and D13. Resistors R14 and C5 are connected in parallel, with one end connected to the emitter of transistor Q7 and the other end connected to the base of transistor Q7 via resistor R12. They are also connected to diode D8, which is used to connect to ignition switch K1. The collector of transistor Q7 is connected to the base of transistor Q8 via resistor R13. Diode D13 is connected between the emitter and collector of transistor Q8. The collector of transistor Q8 is also connected to the first thermocouple dual-coil solenoid valve W1.

[0017] The aforementioned second suction valve delay circuit consists of transistors Q5 and Q6, resistors R9, R10, and R11, capacitor C4, and diodes D7 and D12. Resistors R11 and C4 are connected in parallel, with one end connected to the emitter of transistor Q5 and the other end connected to the base of transistor Q6 via resistor R10. It is also connected to diode D7, which is used to connect to ignition switch K2. The collector of transistor Q5 is connected to the base of transistor Q8 via resistor R10. Diode D12 is connected between the emitter and collector of transistor Q6. The collector of transistor Q6 is also connected to the second thermocouple dual-coil solenoid valve W2.

[0018] The voltage inverter described above consists of resistors R1 and R8, transistor Q4, second oscillation transformer T4, and diode D9. Resistors R1 and R8 are respectively connected across the two ends of the first primary coil of the second oscillation transformer T4. At the same time, resistor R1 is also connected between the base and emitter of transistor Q4. The collector of transistor Q4 is connected to the second primary coil of oscillation transformer T4. The secondary coil of the second oscillation transformer T4 is connected to both the first and second pull-out valve delay circuits through diode D9.

[0019] The working process of this invention is as follows: When the user turns on the gas stove switch K1 or K2, diodes D1 or D2 respectively connect the primary coil of the first high-voltage step-up transformer T2 or the second high-voltage step-up transformer T3. Simultaneously, diodes D3 or D4 connect resistor R2, the primary coil of the first oscillation transformer T1, and the base of transistor Q1. After Q1 is energized, the T1 oscillation transformer begins to oscillate, and its secondary winding receives a relatively high AC voltage. This voltage is rectified by rectifier diode D10 and rapidly charges capacitor C1. When the voltage across C1 reaches the conduction voltage of semiconductor discharge tube D11, the semiconductor discharge tube discharges and boosts the voltage through the primary coil of the first high-voltage step-up transformer T2 or the second high-voltage step-up transformer T3, providing a high-voltage pulse voltage of approximately 18KV to ignite the gas stove. Once the gas stove is ignited, the user can immediately release the switch to stop the ignition.

[0020] When the user turns on the gas stove switch K1 or K2, the electrolytic capacitor C3 is charged through diode D5 or D6, and resistor R5 is connected to the base of transistor Q2. After Q2 turns on, its collector immediately outputs a high potential, which is connected to the base of transistor Q3 through resistor R6. After Q3 turns on, its collector immediately outputs a low potential, which is connected to the base of transistor Q4 through resistor R8 and the primary coil of the second oscillation transformer T4. After Q4 is energized, the second oscillation transformer T4 starts to oscillate. The secondary coil of the oscillation transformer obtains a higher AC voltage, which is rectified by diode D9 to obtain a higher negative DC voltage.

[0021] When switch K1 or K2 is turned on, power is supplied to the first thermocouple solenoid valve coil W1 and the first thermocouple solenoid valve coil W2 through the first suction valve delay circuit and the second suction valve delay circuit respectively, so that the thermocouple solenoid valve is instantly attracted. The suction valve delay time is set to 4-6 seconds.

[0022] In use, the collector of transistor Q8 in the first suction valve delay circuit and the collector of transistor Q6 in the second suction valve delay circuit of the present invention are also connected to the timing module and / or anti-dry burning module of the gas stove. When the aforementioned modules send a positive pulse signal to the input terminal of the first and / or second thermocouple solenoid valve, the thermocouple solenoid valve can be effectively closed and the gas supply cut off.

Claims

1. A pulse ignition controller for a timer or anti-dry-burning shut-off valve in a gas stove, characterized in that... The system includes a DC power supply, an oscillation circuit, a high-voltage generating circuit, a delay circuit, a voltage inverter, a first suction valve delay circuit, a second suction valve delay circuit, a first thermocouple double-coil solenoid valve, and a second thermocouple double-coil solenoid valve. One end of the oscillation circuit is connected to the ignition switch of the gas stove, and the other end is connected to the high-voltage generating circuit. The high-voltage generating circuit outputs a high-voltage pulse to ignite the stove. One end of the delay circuit is connected to the high-voltage generating circuit, and the other end is connected to the voltage inverter. The output of the voltage inverter is connected to two parallel first suction valve delay circuits and second suction valve delay circuits. The first and second suction valve delay circuits are connected to control the opening or closing of the first thermocouple double-coil solenoid valve and the second thermocouple double-coil solenoid valve, respectively. The DC power supply provides the operating voltage for all the above circuits.

2. The instantaneous pulse ignition controller for a timer or anti-dry-burning shut-off valve in a gas stove as described in claim 1, characterized in that... The oscillation circuit consists of diodes D3, D4, and D10, resistors R2 and R3, transistor Q1, capacitor C2, and a first oscillation transformer T1. Diodes D3 and D4 are connected in parallel and then sequentially connected to resistor R2, the first primary coil of the first oscillation transformer T1, and the base of transistor Q1. Capacitor C2 and resistor R3 are connected in parallel between the base and emitter of transistor Q1 in the first oscillation transformer T1. The collector of transistor Q1 is connected to the second-stage coil of the first oscillation transformer T1, and the secondary coil of the first oscillation transformer T1 is connected to rectifier diode D10.

3. The instantaneous pulse ignition controller for a timer or anti-dry-burning shut-off valve in a gas stove as described in claim 1, characterized in that... The high-voltage generating circuit includes a first ignition branch and a second ignition branch connected in parallel, as well as a capacitor C1 and a discharge tube D11. The first ignition branch is formed by connecting a first high-voltage step-up transformer T2 and a diode D1 in series. One end of the first ignition branch is connected to the ignition switch K2 of the gas stove, and the other end is connected to the discharge tube D11 and the capacitor C1 in sequence. The second ignition branch is formed by connecting a second high-voltage step-up transformer T3 and a diode D2 in series. One end of the second ignition branch is connected to the ignition switch K2 of the gas stove, and the other end is connected to the discharge tube D11 and the capacitor C1 in sequence.

4. The instantaneous pulse ignition controller for a timer or anti-dry-burning shut-off valve in a gas stove as described in claim 1, characterized in that... The delay circuit consists of transistors Q2 and Q3, resistors R4, R5, R6, and R7, capacitor C3, and diodes D5 and D6. One end of resistor R5 is connected to the base of transistor Q2, and the other end is connected between resistor R4 and diode D6 in series, and between capacitor C3 and diode D5 in series. The emitter of transistor Q2 is connected to the positive terminal of the DC power supply, and its collector is connected to resistor R7. One end of resistor R6 is connected between the collector of transistor Q2 and resistor R7, and the other end is connected to the base of transistor Q3. The emitter of transistor Q3 is grounded, and its collector is connected to a voltage inverter.

5. The instantaneous pulse ignition controller for a timer or anti-dry-burning shut-off valve in a gas stove as described in claim 1, characterized in that... The first suction valve delay circuit consists of transistors Q7 and Q8, resistors R12, R13, and R14, capacitor C5, and diodes D8 and D13. Resistors R14 and C5 are connected in parallel, with one end connected to the emitter of transistor Q7 and the other end connected to the base of transistor Q7 through resistor R12. They are also connected to diode D8, which is used to connect to ignition switch K1. The collector of transistor Q7 is connected to the base of transistor Q8 through resistor R13. Diode D13 is connected between the emitter and collector of transistor Q8. The collector of transistor Q8 is also connected to the first thermocouple dual-coil solenoid valve W1.

6. The instantaneous pulse ignition controller for a timer or anti-dry-burning shut-off valve in a gas stove as described in claim 1, characterized in that... The second suction valve delay circuit consists of transistors Q5 and Q6, resistors R9, R10, and R11, capacitor C4, and diodes D7 and D12. Resistors R11 and C4 are connected in parallel, with one end connected to the emitter of transistor Q5 and the other end connected to the base of transistor Q6 through resistor R10. It is also connected to diode D7, which is used to connect to ignition switch K2. The collector of transistor Q5 is connected to the base of transistor Q8 through resistor R10. Diode D12 is connected between the emitter and collector of transistor Q6. The collector of transistor Q6 is also connected to the second thermocouple dual-coil solenoid valve W2.

7. The instantaneous pulse ignition controller for a timer or anti-dry-burning shut-off valve in a gas stove as described in claim 1, characterized in that... The voltage inverter consists of resistors R1 and R8, transistor Q4, oscillation transformer T4, and diode D9. Resistors R1 and R8 are connected to the two ends of the first primary coil of the second oscillation transformer T4, respectively. At the same time, resistor R1 is also connected between the base and emitter of transistor Q4. The collector of transistor Q4 is connected to the second primary coil of the second oscillation transformer T4. The secondary coil of the oscillation transformer T4 is connected to both the first and second pull-out valve delay circuits through diode D9.

8. The instantaneous pulse ignition controller for a timer or anti-dry-burning shut-off valve in a gas stove as described in claim 1, characterized in that... The transformer core used in the oscillation circuit is EE10 or EE13.

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