CN113108311B

CN113108311B - Pulse ignition controller with child lock function

Info

Publication number: CN113108311B
Application number: CN202110398319.4A
Authority: CN
Inventors: 谭忠泽; 盛建荣; 黄浩; 周新宁
Original assignee: Nanjing Tianfu Industrial Co ltd
Current assignee: Nanjing Tianfu Industrial Co ltd
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2023-09-12
Anticipated expiration: 2041-04-14
Also published as: CN113108311A

Abstract

The invention discloses a pulse ignition controller with a child lock function, which comprises a high-voltage ignition unit, a first comparator IC1, a second comparator IC2, two sets of timing output units and a relay control unit, wherein the relay control unit adopts a bistable double-contact double-coil relay; the high-voltage ignition unit comprises a step-up transformer and two paths of high-voltage bags connected in parallel, wherein the two high-voltage bags are respectively provided with a first switch K1 and a second switch K2 which are connected in series on the primary sides of the first high-voltage bag and the second high-voltage bag, the primary sides of the two high-voltage bags are connected with the output of the step-up transformer, the primary sides of the step-up transformer are simultaneously connected with the output of an oscillator consisting of an oscillator triode Q5, and the first comparator IC1 and the second comparator IC2 are comparators which are turned over in 6-12 seconds; the bistable double-contact double-coil relay provides two circuit working states corresponding to the child lock and the normal working state.

Description

Pulse ignition controller with child lock function

Technical field:

the invention relates to a safety control circuit of a gas cooker, and belongs to the field of safety control of pulse igniters of gas cookers.

The background technology is as follows:

the gas cooker with the pulse ignition controller is widely applied in the market, but the matched pulse ignition controller has no child lock function, the touch switch is extremely widely applied, and once a child touches the gas cooker switch by mistake, the gas cooker is very likely to be ignited, and immeasurable danger occurs.

If a digital circuit method is adopted, the realization of the key function is controlled by the time delay, which is an ignition control method with a child lock function, but the combination of the key function and an ignition module of an analog circuit complicates the circuit and does not necessarily improve the reliability.

The invention comprises the following steps:

the invention aims to provide the pulse ignition controller with the child lock aiming at the defects of the pulse ignition controller, overcomes the defects of the common pulse ignition controller and greatly improves the use safety of the gas cooker.

The invention has the technical scheme that the pulse ignition controller with the child lock function comprises a high-voltage ignition unit, a first comparator IC1, a second comparator IC2, two sets of timing output units and a relay control unit, wherein the relay control unit adopts a bistable double-contact double-coil relay; the high-voltage ignition unit comprises a step-up transformer and two paths of high-voltage bags (T2 and T3) which are connected in parallel, wherein the two high-voltage bags are respectively provided with a first switch K1 and a second switch K2 which are connected in series on the primary sides of the first high-voltage bag, the primary sides of the two high-voltage bags are connected with the output of the step-up transformer, the primary sides of the step-up transformer are simultaneously connected with the output of an oscillator formed by an oscillator triode Q5, a tap coil of the primary sides of the high-voltage bags also provides an input connection end of the oscillator formed by the oscillator triode Q5 and third and fourth triode amplifying circuits, the third and fourth triode amplifying circuits are connected with the first and second transistor amplifying circuits, and the output of the first and second transistor amplifying circuits are respectively provided with a first comparator IC1 and a second comparator IC2; the first and second comparators IC1 and IC2 are comparators which are turned over (with or without output) with a delay of 6-12 seconds;

the first and second comparators IC1 and IC2 are comparators which are turned over (with or without output) with a delay of 6-12 seconds;

the first relay coil J1 of the bistable double-contact double-coil relay is attracted to enable the first contact and the second contact to be at a first position or a second position at the same time; the first contact JK2 is in a first position, the second comparator IC2 is operated, IC1 is turned off, and in a second position, the first comparator IC1 is operated and the second comparator IC2 is turned off; the first position of the second contact JK1 enables the contact to enable the QE pole of the oscillating triode to be connected with the negative electrode of the power supply, and the second position enables the E pole of the oscillating triode Q to be disconnected, so that the igniter is in a child-lock state and cannot ignite;

the first contact AC of JK2 is connected to the first position to make the comparator IC2 in working state, on the other hand, the contacts A1 and B1 of the second contact JK1 are connected to the first position to make the QE pole of the oscillating triode connected with the negative pole of the power supply, and at this time, the igniter is normal (or resumes) ignition function; when the bistable double-contact double-coil relay is attracted by the second relay coil J2, the JK2 contact is converted into AB connection and connected to a second position, the comparator IC1 is in a working state, the JK1 contact is converted into A1C1 to be connected to the second position, the QE pole of the oscillation triode is disconnected from the negative pole of the power supply, and the igniter is in a child-lock state and cannot ignite;

the bistable double-contact double-coil relay is characterized in that the second relay coil J2 is attracted by a child lock for loading: the primary coil of the first and second high-voltage bags is respectively connected with a switch K1 or K2 and a power supply in series, the power supply is communicated with triodes Q4 and Q3 through K1 or K2 to conduct and output high potential and is connected with Q2 in parallel, the second comparator IC2 outputs low potential and enables the second triode Q2 to conduct and output high potential through a first contact JK2 (AC), a second relay coil J2 connected with the second triode Q2 in series is electrified and sucked to enable the second contact JK1 and JK2 to be converted into a second position, and the E electrode of an oscillator triode Q5 is connected with the negative electrode of the power supply to be disconnected; recovery process: when K1 or K2 is connected to power, the first comparator IC1 works, the first triode Q1 is turned over by 6-12 seconds after delay to output high potential, the second relay coil J1 connected with the Q1 in series is electrified and sucked, the first position is converted, the emitter of the Q5 is connected with the negative electrode of the power supply, and the igniter immediately resumes the ignition function.

The first and second comparators IC1, IC2 are flipped based on the following elements: the charge resistors R1 and R2 are respectively connected with the charge capacitors C1 and C2 to obtain a comparator turnover time constant, and the turnover time constant is set to be 8+/-2 seconds, so that when the on time of the ignition switch K1 or K2 is less than 8+/-2 seconds, the first comparator IC1 and the second comparator IC2 cannot be turned over, and if the first comparator IC1 and the second comparator IC2 cannot be turned over, the bistable double-contact double-coil relay coil cannot obtain voltage, and the contact positions of the JK2 and the JK1 cannot be changed; the time constant is selected to be 6-12 seconds, so that the comparator IC2 cannot be turned over when the on time of K1 (or K2) is less than 8+/-2 seconds (within 6-12 seconds), and the time of the user for turning on the K1 (or K2) is not more than 8 seconds when the cooker is normally used, and the cooker is normally used when no child lock is loaded, and the child lock is loaded or removed by pressing the RC time constant of the switch for more than 6-12 seconds.

By pressing K1 or K2 for a long time (more than 6-12 seconds), a power supply (a battery and the like) provides an input connection end of an oscillator formed by an oscillation triode Q5 through a primary tap coil of a high-voltage package, so that the bistable double-contact double-coil relay works, and the state of the first contact or the second contact is switched to correspond to different working circuits, even if the invention loads a child lock or removes the child lock.

The bistable double-contact circuit is a comparator which is turned over with a delay of 6-12 seconds; the first and second comparators IC1 and IC2 are two sets of comparators with the LM393 being two sets of timing flip outputs. The first or second relay coil J1, J2 of the bistable double-contact double-coil relay is engaged such that the first and second contacts JK1, JK2 are either in the first position at the same time or in the second position at the same time.

The bistable double-contact double-coil relay has the beneficial effects that the bistable double-contact double-coil relay provides two circuit working states, which correspond to the child lock and the normal working state. The invention has the advantages that the cost is low, and the time setting work is reliable by using the charging time setting of the large-capacity capacitor because the ignition module drive is also an analog circuit and the circuit can be designed integrally. The invention not only has the common pulse ignition function, but also has the child lock function, can effectively prevent the occurrence of the danger that a child touches the kitchen range switch by mistake to ignite the gas kitchen range, greatly improves the reliability and the safety of the gas kitchen range in use, has simple and ingenious conception, saves electricity, has strong practicability, and can be widely applied to the technical field of pulse ignition controllers.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

The specific embodiment is as follows:

the present invention will be described in detail with reference to fig. 1.

The high-voltage ignition unit comprises two sets of (primary) high-voltage packages T2 (and T3) which are connected in parallel, and a first switch K1 and a second switch K2 are respectively connected in series on the first high-voltage package and the second high-voltage package, the primary of the high-voltage package is connected with the output of a step-up transformer T1, the primary of the step-up transformer T1 is connected in series with the output of an oscillator formed by a triode Q5, and the primary of the step-up transformer T1 also provides the electric connection of the oscillator formed by the triode Q5; Q1-Q4 are first through fourth triodes, respectively, and Q5 is an oscillator triode.

When a user turns on a K1 (or K2) switch, a high-potential signal passes through a T2 (or T3) high-voltage package primary coil, a step-up transformer T1 primary coil, resistors R17 to Q5 base electrodes, oscillation is generated after the Q5 base electrodes are electrified, the capacitor C5 is charged through a diode D7 after the step-up transformer is boosted, when the voltage at two ends of the C5 is raised to the conduction voltage of a silicon switch diode, the silicon switch diode is immediately conducted, the conduction voltage of the silicon switch diode is subjected to primary discharge through the high-voltage package T2 (or T3), and high-voltage pulse discharge is generated after secondary step-up to ignite a kitchen range.

When K1 (or K2) is switched on, the high potential signal of the high potential signal also enables Q4 to be switched on through D5 and R14, the negative signal enables Q3 to be switched on through R13 after Q4 is switched on,

the first or second comparator LM393 is powered on and whether to operate depending on the position of the contacts of the first contact relay JK2, when the bistable double-contact switch is in the right, i.e., the second position (the first position of the JK2 contacts of the first contact relay only causes the first comparator to operate with the power supply, the second position causes only the second comparator to operate with the power supply), only the second comparator IC2 is operated, and the second comparator IC2 is a timer-flipped comparator, the flipping time is set to 8 seconds (the time constant can be selected to 6-12 seconds by the capacity and resistance of the charged electrolytic capacitor), so the comparator IC2 will not flip when the on time of K1 (or K2) is less than 8 seconds (6-12 seconds), and the key-on time of the user will not exceed 8 seconds when the stove is normally used, and the child lock function is not present.

When a user wants to load (open) the child lock function, only the switch K1 (or K2) is long pressed, at the moment, the second comparator IC2 works (the first comparator IC1 does not work), the high potential charges the electrolytic capacitor C2 through R8, when the terminal voltage of the second comparator IC2 ' - ' is gradually increased to be higher than the "+ ' terminal, the comparator immediately turns over, the second comparator IC2 outputs low potential to enable the triode Q2 to be conducted through R12 and output high potential, the bistable double-contact second relay coil J2 is electrified and attracted, the contacts of the JK1 and the JK2 are changed from the right to the left, namely the E electrode connection cathode of the Q5 is disconnected, the JK2 enables the IC1 to be powered on, the IC2 cannot be powered on, at the moment, the child lock function is started, and the igniter cannot be ignited when the user presses the switch K1 or the K2 normally.

When a user wants to cancel the child lock function, as long as a switch K1 (or K2) is pressed, a high potential signal enables Q4 to be conducted and output low potential through D5 and R14, Q3 to be conducted and output high potential through R13, the first comparator IC1 works because JK1 is at a first left position, the turnover time of the first comparator IC1 is set to 8 seconds (6-12 seconds), the high potential charges an electrolytic capacitor C1 through R2 to enable the end potential of the first comparator IC1 to be gradually increased, when the end potential is higher than the end potential of the first comparator IC1, the first comparator IC1 immediately turns over and outputs low potential, Q1 is conducted and output high potential through R6, a bistable double-contact 1 relay coil J1 is electrified and sucked, contacts of JK1 and JK2 are immediately switched, a Q5 emitter is connected with a negative electrode of a power supply, and an igniter immediately resumes the ignition function. The second position of the JK2 contact causes IC2 to operate, turning off IC1 power.

The igniter of the invention has ingenious, simple and reliable conception, and no standby current is generated no matter the circuit of the child lock function is opened or closed due to the adoption of the bistable double-contact relay.

The above description is only of the preferred embodiments of the present invention, and any modifications, equivalent substitutions and improvements made by those skilled in the art based on the new concept of the present invention should be included in the scope of the present invention.

Claims

1. A pulse ignition controller with a child lock function is characterized in that: the high-voltage ignition device comprises a high-voltage ignition unit, a first comparator (IC 1) and a second comparator (IC 2), two sets of timing output units and a relay control unit, wherein the relay control unit adopts a bistable double-contact double-coil relay; the high-voltage ignition unit comprises a step-up transformer and two paths of high-voltage bags (T2 and T3) which are connected in parallel, wherein a first switch (K1) and a second switch (K2) are respectively connected in series with the primary sides of the first high-voltage bag and the second high-voltage bag (T2 and T3), the primary sides of the two high-voltage bags are connected with the output of the step-up transformer, the primary sides of the step-up transformer are simultaneously connected with the output of an oscillator formed by an oscillator triode (Q5), a tap coil of the primary sides of the high-voltage bags is also provided with the input connection end of the oscillator formed by the oscillator triode (Q5) and a third triode amplifying circuit and a fourth triode amplifying circuit, the third triode amplifying circuit and the fourth triode amplifying circuit are connected with the first transistor amplifying circuit and the second transistor amplifying circuit, and the output of the first transistor amplifying circuit and the second transistor amplifying circuit are respectively connected with a first comparator (IC 1 and a second comparator (IC 2); the first comparator and the second comparator (IC 1 and IC 2) are comparators with delay time of 6-12 seconds and flip;

a first relay coil (J1) of the bistable double-contact double-coil relay is attracted so that the first contact and the second contact are both at a first position or a second position at the same time; the first contact (JK 2) is in a first position, the second comparator (IC 2) is operated, and the first comparator (IC 1) is disconnected; the first contact (JK 2) is in the second position, the first comparator (IC 1) is active and the second comparator (IC 2) is off; the second contact (JK 1) enables the emitter of the oscillator triode (Q5) to be connected with the negative electrode of the power supply at the first position, and the second contact (JK 1) enables the emitter of the oscillator triode (Q5) to be disconnected at the second position, so that the igniter is in a child-lock state;

the bistable double-contact double-coil relay is characterized in that a second relay coil (J2) controls the child lock to load when a first contact (JK 2) is attracted: the power supply is respectively communicated with the fourth triode (Q4) and the third triode (Q3) through the first switch (K1) and the second switch (K2) to output high potential, the power supply is connected with the second comparator (IC 2) through the first contact (JK 2), the second comparator (IC 2) outputs low potential to enable the second triode (Q2) to be conducted and output high potential through the twelfth resistor (R12) connected with the second comparator, the second relay coil (J2) connected with the second triode (Q2) in series is electrified and sucked to enable the second triode and the first contact (JK 1, JK 2) to be converted into a second position, and the emitter of the oscillator triode (Q5) is connected with the power supply cathode to be disconnected;

when the child lock function is cancelled, the first or second switches (K1, K2) are pressed for a long time, a high potential signal enables the fourth triode (Q4) to be conducted through the connected diode and fourteenth resistors (D5, R14) to output a low potential, the third triode (Q3) is conducted through the connected thirteenth resistor (R13) to output a high potential, the first comparator (IC 1) works because the second contact (JK 1) is at the left first position, the turnover time of the first comparator (IC 1) is set to 8 seconds, the high potential enables the first comparator (IC 1) — to be gradually increased through the connected second resistor (R2) to charge the connected electrolytic capacitor (C1), "when the terminal is higher than the terminal of the first comparator (IC 1) +", the first comparator (IC 1) is immediately turned over to output the low potential, the first triode (Q1) is conducted through the connected sixth resistor (R6) to output the high potential, the double-contact first relay coil (J1) is electrically sucked, the second JK 1) is electrically connected with the first igniter (JK 1), and the double-contact point bistable state igniter (JK 1) is immediately restored to the first igniter (Q1), and the negative electrode is immediately restored to the first igniter position (JK 1).