CN210833860U - Single-needle ignition and alternating-current flame detection circuit - Google Patents
Single-needle ignition and alternating-current flame detection circuit Download PDFInfo
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- CN210833860U CN210833860U CN201922300557.8U CN201922300557U CN210833860U CN 210833860 U CN210833860 U CN 210833860U CN 201922300557 U CN201922300557 U CN 201922300557U CN 210833860 U CN210833860 U CN 210833860U
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Abstract
The utility model discloses a single needle ignition and interchange flame detection circuitry, including resistance R1 ~ R14, piezo-resistor RV, electric capacity C1 ~ C6, rectifier diode D1 ~ D4, zener diode ZD, DIAC, triode Q1, triode Q2, high pressure package T1, opto-coupler U1, relay JD and ignition needle/flame needle IG, relay JD, resistance R2, diode D1, diode D2, electric capacity C5, DIAC DIAC, piezo-resistor RV, high pressure package T1 constitute pulse ignition circuitry, the utility model discloses an ignition needle or flame needle both can realize high-pressure pulse ignition function, also can realize exchanging flame signal's detection, have not only saved the cost, have more simplified the structure of complete machine product, have higher practical value and price/performance ratio, technically have certain breakthrough more.
Description
Technical Field
The utility model relates to a detect technical field, specifically a single needle ignition and exchange flame detection circuitry.
Background
In the field of gas appliance product control, pulse ignition and flame detection are indispensable technologies. In conventional designs, the pulse ignition circuit and the flame detection circuit are often separated because of the ultra-high voltage of pulse ignition and the strong interference effect caused thereby, so that in conventional designs, a separate ignition needle and a separate flame detection needle are often arranged inside the machine.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a single needle is igniteed and is exchanged flame detection circuitry to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a single-needle ignition and alternating current flame detection circuit comprises resistors R1-R14, a piezoresistor RV, capacitors C1-C6, rectifier diodes D1-D4, a voltage stabilizing diode ZD, a DIAC, a triode Q1, a triode Q2, a high-voltage package T1, an optocoupler U1, a relay JD and an ignition needle/flame needle IG, wherein the relay JD, the resistor R2, the diode D1, the diode D2, the capacitor C5, the DIAC, the piezoresistor RV and the high-voltage package T1 form a pulse ignition circuit, the resistor R1 is connected with one end of the resistor R2 and the pole N of a 220V alternating current power supply, the other end of the resistor R1 is connected with the ground PE of a system shell, the other end of the resistor R2 is connected with the cathode of a diode D9, the anode of a diode D1 is connected with the anode of a diode D2, one end of the DIAC and the pole of a zero line coil 1 of the high-voltage package, and the cathode of a diode, The other end of a bidirectional trigger diode DIAC is connected with one end of an output port of a relay JD switch, the other end of a capacitor C5 is connected with the pole 2 of a primary coil of a high-voltage pack, the other end of the output port of the relay JD switch is connected with the pole L of a 220V alternating current power supply live wire, resistors R3 and R4 are also connected with the pole L of the 220V alternating current power supply live wire, the other end of R3 is connected with one end of a resistor R5 and one end of a capacitor C1, the other end of a resistor R4 is connected with the cathode of a diode D3, the cathodes of the capacitors C3 and C4, the anode of a zener diode ZD, one end of a resistor R12 and the emitter of a triode Q2, the other end of a resistor R5 is connected with one end of a capacitor C2, the anode of a capacitor C3, one end of a resistor R8, one end of a resistor R10, the cathode of a zener diode and the emitter of a triode Q, One end of a resistor R7 is connected, the other end of the resistor R9 is connected with a piezoresistor RV and a 4 pin of a high-voltage pack secondary coil, the other end of the piezoresistor RV is connected with a system shell ground PE, a 3 pin of the high-voltage pack secondary coil is connected with an ignition needle/flame needle IG, the other end of the resistor R7 is connected with the other end of a resistor R8 and a base of a triode Q1Q1, a collector of the triode Q1 is connected with a positive electrode of a capacitor C4, the other end of the resistor R12 and one end of a resistor R11, the other end of the resistor R11 is connected with a base of a triode Q2, a collector of the triode Q2 is connected with a resistor R13, the other end of the resistor R13 is connected with a positive electrode of a diode D4 and a 2 nd pin of an optocoupler U1, a cathode of the diode D4 is connected with the other end of a resistor R10 and a 1 st pin of the optocoupler U1, a 3 rd pin of the optocoupler, the other end of the resistor R14 is connected with the anode VCC of the system low-voltage direct-current power supply, and the cathode of the capacitor C6 is connected with the system low-voltage direct-current power supply ground.
As a further aspect of the present invention: the resistance value of the resistor R1 is larger than 1M omega.
As a further aspect of the present invention: the model of the optical coupler U1 is PC 817.
As a further aspect of the present invention: the DIAC is of type K150.
As a further aspect of the present invention: the specification of the zener diode ZD is 9.1V.
As a further aspect of the present invention: the type of the piezoresistor RV is 10D 561.
As a further aspect of the present invention: the triode Q1 is a PNP type triode, and the triode Q2 is an NPN type triode.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an ignition needle or flame needle both can realize high-voltage pulse ignition function, also can realize exchanging the detection of flame signal, have not only saved the cost, have more simplified the structure of complete machine product, have higher practical value and price/performance ratio, technically have certain breakthrough more.
Drawings
Fig. 1 is a schematic diagram of a hardware circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1: referring to fig. 1, in the embodiment of the present invention, the switch is composed of resistors R1-R14, a voltage dependent resistor RV, capacitors C1-C6, rectifier diodes D1-D4, a voltage stabilizing diode ZD, a DIAC, triodes Q1 and Q2, a high voltage pack T1, an optocoupler U1, a relay JD, and an ignition needle/flame needle IG. In the circuit, a relay JD, a resistor R2, diodes D1 and D2, a capacitor C5, a DIAC, a voltage dependent resistor RV and a high-voltage package T1 form a pulse ignition circuit, and other parts form a flame detection circuit.
In this circuit, as shown in fig. 1, a resistor R1 is connected to one end of a resistor R2 and the N pole of the neutral line of the 220V ac power supply, and the other end of the resistor R1 is connected to the system chassis ground PE. The other end of the resistor R2 is connected with the cathode of a diode D1, and the anode of a diode D1 is connected with the anode of a diode D2, one end of a DIAC and the pole of a high-voltage package primary coil 1. The cathode of the diode D2 is connected with one end of the capacitor C5, the other end of the DIAC and one end of the output port of the relay JD switch. The other end of the capacitor C5 is connected with the pole of the high-voltage package primary coil 2. The other end of the output port of the relay JD switch is connected with the L pole of a live wire of a 220V alternating-current power supply. The resistors R3 and R4 are simultaneously connected with the L pole of the 220V alternating current power supply live wire, and the other end of R3 is simultaneously connected with one end of the resistor R5 and one end of the capacitor C1. The other end of the resistor R4 is connected with the cathode of the diode D3, the anode of the diode D3 is simultaneously connected with the cathodes of the capacitors C3 and C4, the anode of the zener diode ZD, one end of the resistor R12 and the emitter of the NPN type triode Q2. The other end of the resistor R5 is connected with one end of a capacitor C2, the anode of a capacitor C3, one ends of resistors R8 and R10, the cathode of the voltage stabilizing diode ZD and the emitter of a PNP type triode Q1. The other end of the capacitor C1 is connected with one end of the resistors R6 and R9, and the other end of the R6 is connected with the other end of the capacitor C2 and one end of the resistor R7. The other end of R9 is connected with piezoresistor RV, 4 feet of high-voltage package secondary coil, the other end of piezoresistor RV is connected with system shell ground PE, 3 feet of high-voltage package secondary coil are connected with ignition needle/flame needle IG. The other end of the resistor R7 is connected with the other end of the resistor R8 and the base of the PNP triode Q1. The collector of the PNP triode is connected with the anode of the capacitor C4, the other end of the resistor R12 and one end of the resistor R11. The other end of the resistor R11 is connected with the base of an NPN triode Q2, and the collector of the NPN triode Q2 is connected with the resistor R13. The other end of the resistor R13 is connected with the anode of the diode D4 and the 2 nd pin of the optocoupler U1. The cathode of the diode D4 is connected with the other end of the resistor R10 and the 1 st pin of the optocoupler U1. And the 3 rd pin of the optocoupler U1 is connected with a system low-voltage direct-current power ground, and the 4 th pin of the optocoupler U1 is connected with the positive electrodes of the resistor R14 and the capacitor C6 and is connected with a certain IO port of a system singlechip as a flame detection signal output port FID _ OUT. The other end of the resistor R14 is connected with the anode VCC of the system low-voltage direct-current power supply, and the cathode of the capacitor C6 is connected with the system low-voltage direct-current power supply ground.
When the relay JD is driven by a control signal and two ends of a switch output port of the relay JD are closed, a pulse ignition circuit can be started to work, at the moment, a continuous pulse high voltage of 15-20 kV can be generated between pins 3 and 4 of a high-voltage secondary coil, and the pulse high voltage discharges to a PE (voltage dependent resistor) on a system shell through an ignition needle/flame needle IG (at the moment, the voltage dependent resistor RV is instantaneously broken down), so that a pulse ignition function is realized. When the system is in a flameless static working state, the PNP triode Q1 and the NPN triode Q2 are both in a cut-off working state, and the optocoupler U1 is also in a cut-off state, so that the level of the flame detection signal output port FID _ OUT is high level. When a combustion flame signal exists between the ignition needle/flame needle IG and the system cabinet ground PE, a resistor R3, a capacitor C1, a resistor R9, the ignition needle/flame needle IG, the flame, the system cabinet ground PE and a resistor R1 form a rectifying circuit because of the unidirectional conductivity of the flame, and the capacitor C1 can be charged by a 220V power supply alternating current signal under the unidirectional conductivity of the flame. When the positive and negative dc voltages accumulated at the two ends of the C1 reach a certain level, the PNP transistor is triggered to be in saturation conduction, and the NPN transistor is driven to be in saturation conduction, so that the optical coupler U1 is also in conduction. After the optocoupler U1 is switched on, the level of the flame detection signal output port FID _ OUT is inverted and is converted from high level to low level, so that the flame signal can be detected.
Example 2: based on embodiment 1, the resistors R1, R3-R9, the capacitors C1, C2, their resistance values or capacitance values, and other specification parameters in the circuit of the present design need to meet the normal requirements of flame detection function, and also need to ensure the electrical safety of the system, especially the resistor R1 needs to be at least more than 1M Ω, and the power needs to ensure that the resistor does not generate heat or scald.
The optocoupler U1 in the circuit mainly plays a role in power isolation and is of the type PC 817. The model of the DIAC is K150, and the specifications of the zener diode ZD and the piezoresistor RV are 9.1V and 10D561 respectively.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A single-needle ignition and alternating current flame detection circuit comprises resistors R1-R14, a piezoresistor RV, capacitors C1-C6, rectifier diodes D1-D4, a voltage stabilizing diode ZD, a DIAC, a triode Q1, a triode Q2, a high-voltage package T1, an optocoupler U1, a relay JD and an ignition needle/flame needle IG, and is characterized in that the relay JD, the resistor R2, the diode D1, the diode D2, the capacitor C5, the DIAC, the piezoresistor RV and the high-voltage package T1 form a pulse ignition circuit, one end of the resistor R2 and a 220V alternating current power supply null line N pole are connected with the resistor R1, the other end of the resistor R2 is connected with a diode D9 cathode, the anode of the diode D6862 is connected with the anode of a diode D2, one end of the DIAC DIAC and a high-voltage package primary coil 1 pole, one end of the capacitor D8653 is connected with a cathode 868427, The other end of a bidirectional trigger diode DIAC is connected with one end of an output port of a relay JD switch, the other end of a capacitor C5 is connected with the pole 2 of a primary coil of a high-voltage pack, the other end of the output port of the relay JD switch is connected with the pole L of a 220V alternating current power supply live wire, resistors R3 and R4 are also connected with the pole L of the 220V alternating current power supply live wire, the other end of R3 is connected with one end of a resistor R5 and one end of a capacitor C1, the other end of a resistor R4 is connected with the cathode of a diode D3, the cathodes of the capacitors C3 and C4, the anode of a zener diode ZD, one end of a resistor R12 and the emitter of a triode Q2, the other end of a resistor R5 is connected with one end of a capacitor C2, the anode of a capacitor C3, one end of a resistor R8, one end of a resistor R10, the cathode of a zener diode and the emitter of a triode Q, One end of a resistor R7 is connected, the other end of the resistor R9 is connected with a piezoresistor RV and a 4 pin of a high-voltage pack secondary coil, the other end of the piezoresistor RV is connected with a system shell ground PE, a 3 pin of the high-voltage pack secondary coil is connected with an ignition needle/flame needle IG, the other end of the resistor R7 is connected with the other end of a resistor R8 and a base of a triode Q1Q1, a collector of the triode Q1 is connected with a positive electrode of a capacitor C4, the other end of the resistor R12 and one end of a resistor R11, the other end of the resistor R11 is connected with a base of a triode Q2, a collector of the triode Q2 is connected with a resistor R13, the other end of the resistor R13 is connected with a positive electrode of a diode D4 and a 2 nd pin of an optocoupler U1, a cathode of the diode D4 is connected with the other end of a resistor R10 and a 1 st pin of the optocoupler U1, a 3 rd pin of the optocoupler, the other end of the resistor R14 is connected with the anode VCC of the system low-voltage direct-current power supply, and the cathode of the capacitor C6 is connected with the system low-voltage direct-current power supply ground.
2. The circuit for detecting single needle ignition and alternating current flame as claimed in claim 1, wherein the type of the optical coupler U1 is PC 817.
3. The single pin ignition and ac flame detection circuit of claim 1, wherein the DIAC is type K150.
4. The circuit of claim 1, wherein the zener diode ZD has a size of 9.1V.
5. The circuit of claim 2, wherein the varistor RV has a size of 10D 561.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922300557.8U CN210833860U (en) | 2019-12-18 | 2019-12-18 | Single-needle ignition and alternating-current flame detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922300557.8U CN210833860U (en) | 2019-12-18 | 2019-12-18 | Single-needle ignition and alternating-current flame detection circuit |
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| CN210833860U true CN210833860U (en) | 2020-06-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305055A (en) * | 2020-09-29 | 2021-02-02 | 华帝股份有限公司 | Combustion working condition control device and control method of gas appliance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305055A (en) * | 2020-09-29 | 2021-02-02 | 华帝股份有限公司 | Combustion working condition control device and control method of gas appliance |
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