Barbecue oven light and igniter control circuit

Abstract

The present invention discloses a barbecue stove light and igniter control circuit, including a main control, the main control including a main control circuit, a power management circuit for converting a first power supply voltage, a connection terminal including first to fifth pins, the first pin connected to a power supply, the third pin connected to the first power supply voltage, the fifth pin grounded, one end of a first switch connected to the first pin, the second end of the first switch connected to the igniter power supply terminal; the main control circuit includes a processing chip, a first IO port connected to a first resistor and a second resistor, the other end of the second resistor connected to the first power supply voltage, a first end of a second switch connected between the first resistor and the second resistor, and the second end of the second switch grounded; the second IO port connected to a conduction control end of a switch tube circuit, the signal input end of the switch tube circuit connected to the fourth pin. The present invention solves the problem that when the igniter works at high voltage (≥12KV), the key components of the LED lamp beads and the main controller are damaged.

Description

Technical Field

[0001] The invention relates to the technical field of household and commercial gas barbecue ovens, and in particular to a barbecue oven light and igniter control circuit. Background Art

[0002] At present, the batteries of household and commercial gas barbecue grills usually pass through the voltage converter to directly power the electrical components without isolation treatment. Once the power is turned on, all the lamps and devices will basically work at the same time. This will lead to poor battery life (short battery life), especially for products with multi-functions and decorative lights. On the other hand, the high voltage (≥12KV) generated by the igniter when working will interfere with or crosstalk and damage the LED lamp beads and the LED lamp beads in the switch, which will reduce the working life of the LED lamp beads. At the same time, the high voltage (12KV) returned by the igniter when working will also damage the key components in the gas barbecue grill and even cause the control system to fail. Summary of the invention

[0003] Based on the deficiencies of the prior art, the present invention aims to provide a barbecue grill light and igniter control circuit, which solves the problem of LED lamp beads being damaged when the igniter is working at high voltage by improving the structure and connection method of the igniter, controller components and power supply, effectively protects the key components in the controller, ensures the quality of the product, and at the same time extends the battery life.

[0004] The technical solution of the present invention is:

[0005] A barbecue grill light and igniter control circuit, characterized in that: it includes a main control, a first switch, a second switch, a plurality of parallel decorative light board circuits and a connecting terminal, the main control includes a power supply circuit and a main control circuit, the power supply circuit includes a power supply and a power management circuit of the power supply, the power management circuit is used to convert the voltage of the power supply into the power supply voltage required by each module, including the first power supply voltage, the connecting terminal includes a first to a fifth pin, the first pin is connected to the power supply, the third pin is connected to the first power supply voltage, the fifth pin is grounded, the first end of the first switch is connected to the first pin, the second end of the first switch is connected to the power supply end of the igniter, and the first switch provides a working voltage for the igniter when it is closed;

[0006] The main control circuit includes a processing chip and a first resistor connected to a first IO port of the processing chip, the other end of the first resistor is also connected to a second resistor, the other end of the second resistor is connected to a first power supply voltage, a connecting line between the first resistor and the second resistor is also connected to a first end of a second switch, and a second end of the second switch is grounded;

[0007] The second IO port of the processing chip is connected to the conduction control end of a switch tube circuit, the signal input end of the switch tube circuit is connected to the fourth pin, the fourth pin is also connected to the ground through a first capacitor C2 in series, the third pin is also respectively connected to each power supply end in each decorative lamp board circuit in parallel, and the ground in each decorative lamp board circuit is connected to the fourth pin.

[0008] Furthermore, the switching tube circuit includes an NMOS tube, a gate of the NMOS tube is connected to a first end of a third resistor R3, a second end of the third resistor R3 is connected to a second IO port of a processing chip, the gate of the NMOS tube is also grounded through a second capacitor C11 connected in series, a source of the NMOS tube is grounded, a drain is connected to a first end of a fourth resistor R5, and a second end of the fourth resistor is connected to a fourth pin.

[0009] Furthermore, the drain of the NMOS tube is also connected to the anode of a diode D3, and the cathode of the diode D3 is connected to the anode of the power supply.

[0010] Furthermore, indicator light circuits are respectively provided in the first switch and the second switch, the third pin is respectively connected to the power supply end of the indicator light circuits in the first switch and the second switch, and the ground of the indicator light circuits is respectively connected to the fourth pin.

[0011] Furthermore, the power supply is an alkaline battery with a voltage of +4.5V to -4.5V, and the power management circuit is used to convert the voltage of the power supply into a voltage of 3.3V, wherein the negative electrode of the first voltage regulator is connected to the output end of the 3.3V voltage, and the positive electrode of the first voltage regulator is grounded.

[0012] Furthermore, the power management circuit includes a power management chip of model LN3406.

[0013] Furthermore, the connecting line between the first resistor and the second resistor is also connected to the negative electrode of the second voltage regulator tube, and the positive electrode of the second voltage regulator tube is grounded.

[0014] Furthermore, a varistor is connected between the power supply end and the ground end of the plurality of parallel-connected decorative lamp board circuits, and the varistor is connected in parallel with all the LED lamps in each of the decorative lamp board circuits.

[0015] Furthermore, each decorative lamp panel circuit includes a fifth resistor and a sixth resistor, the first ends of the fifth resistor and the sixth resistor are respectively connected to the third pin, the second end of the fifth resistor is respectively connected to the positive electrode of the first light-emitting diode and the positive electrode of the second light-emitting diode, the negative electrode of the first light-emitting diode and the negative electrode of the second light-emitting diode are respectively connected to the fourth pin, the second end of the sixth resistor is respectively connected to the positive electrode of the third light-emitting diode and the positive electrode of the fourth light-emitting diode, the negative electrode of the third light-emitting diode and the negative electrode of the fourth light-emitting diode are respectively connected to the fourth pin, the power supply end is powered by the first power supply voltage connected to the third pin, and the grounding end is the grounding end connected to the fourth pin.

[0016] Furthermore, a third capacitor is connected in series between the power supply end and the ground end.

[0017] The beneficial effects of the present invention are: solving the problem of damaging the key components of the LED lamp beads and the main controller when the igniter is working at high voltage (≥12KV), ensuring product quality and extending the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the power management circuit of this embodiment;

[0019] Figure 2 is a schematic diagram of the main control circuit of this embodiment;

[0020] Figure 3 This is a schematic diagram of the circuit of the decorative lamp board of this embodiment. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0022] A barbecue grill light and igniter control circuit, comprising a main control, a first switch, a second switch, a plurality of parallel decorative light board circuits and connection terminals, wherein the main control comprises a power supply circuit and a main control circuit, wherein the power supply circuit comprises a power supply and a power supply management circuit of the power supply, wherein the power supply management circuit is used to convert the voltage of the power supply into the power supply voltage required by each module, including a first power supply voltage, such as Figure 1 As shown, the power supply of this embodiment uses 3 D-type alkaline batteries with a voltage of +4.5V--4.5V. The BAT terminal in the figure is the alkaline battery terminal. The power management circuit uses a power management chip U1 with a model of LN3406. The power management circuit is used to convert the voltage of the power supply into a first power supply voltage VCC of 3.3V, wherein the negative electrode of the first voltage regulator D1 is connected to the output end of the 3.3V voltage, and the positive electrode of the first voltage regulator D1 is grounded. The first voltage regulator D1 stabilizes the output voltage of 3.3V.

[0023] like Figure 2 As shown, the connection terminal JP1 includes first to fifth pins, the first pin 1 is connected to the power supply, the third pin 3 is connected to the first power supply voltage VCC, the fifth pin 5 is grounded, one end of the first switch is connected to the first pin 1, the first pin 1 is used to connect the positive electrode of the power supply BAT, the second end of the first switch is connected to the positive electrode of the igniter, and when the first switch is closed, a path can be formed between the power end of the igniter and the power supply BAT.

[0024] The main control circuit includes a processing chip U2 and a first resistor R1 connected to a first IO port of the processing chip. The processing chip of this embodiment includes a single-chip microcomputer of model A153D. The other end of the first resistor R1 is also connected to a second resistor R2. The other end of the second resistor R2 is connected to a first power supply voltage VCC. The connecting line between the first resistor R1 and the second resistor R2 is also connected to a first end of a second switch. The second end of the second switch is grounded, wherein the first end of the second switch is connected to pin 2, and the second end of the second switch is connected to pin 5.

[0025] The connecting line between the first resistor R1 and the second resistor R2 is also connected to the negative electrode of the second voltage regulator D2, and the positive electrode of the second voltage regulator D2 is grounded. The second voltage regulator D2 further stabilizes the voltage input into the processing chip U2 to prevent high-voltage crosstalk from damaging the processing chip.

[0026] The second IO port of the processing chip is connected to the conduction control end of a switch tube circuit, the signal input end of the switch tube circuit is connected to the fourth pin 4, the fourth pin 4 is also connected to the ground through a first capacitor C2 in series, the third pin 3 is also respectively connected to each power supply end in each decorative lamp board circuit in parallel, and the ground in each decorative lamp board circuit is connected to the fourth pin 4.

[0027] The first switch and the second switch are respectively provided with indicator light circuits, the third pin is respectively connected to the power supply end of the indicator light circuits in the first switch and the second switch, and the ground of the indicator light circuits is respectively connected to the fourth pin 4.

[0028] When the second switch is disconnected, the first power supply voltage, the first resistor R1, and the second resistor R2 constitute a circuit for powering the processing chip. Under the control of this signal, the first IO port of the processing chip outputs a high level, and the switch tube Q1 is not turned on. At this time, the decorative lamp board circuit connected between the third pin 3 and the fourth pin 4 cannot constitute a power supply circuit, and the internal LED lamp is in an off state. When the second switch is pressed, the second resistor R2 is pulled down, and the signal input to the first IO port changes. At this time, the processing chip sends an output signal change instruction to the second IO port, from a high level to a low level, the switch tube Q1 is turned on, and the decorative lamp board circuit connected between the third pin and the fourth pin constitutes a power supply conduction circuit, and all LED lights are on. In addition, when the switch tube Q1 is turned on, the processing chip starts timing, and after a certain delay, the second IO port sends a high level signal again, Q1 is turned off, and all LED lights are off.

[0029] The second switch not only controls the turning on and off of the LED lamp in the decorative lamp board circuit, but also controls the duration of the lighting. In addition, the indicator lights in the first switch and the second switch are also controlled because they are connected in parallel with the decorative lamp board circuit.

[0030] It should be noted that the switching tube circuit includes but is not limited to an NMOS tube, the gate of the NMOS tube is connected to the first end of the third resistor R3, the second end of the third resistor R3 is connected to the second IO port of the processing chip, the gate of the NMOS tube is also grounded through a second capacitor C11 connected in series, the source of the NMOS tube is grounded, the drain is connected to the first end of the fourth resistor R5, and the second end of the fourth resistor R5 is connected to the fourth pin 4.

[0031] The drain of the NMOS tube is also connected to the positive electrode of a diode D3, and the negative electrode of the diode D3 is connected to the negative electrode of the power supply, that is, the negative electrode of the alkaline battery. The diode D3 plays an overvoltage protection role for the switch tube.

[0032] This embodiment has 6 parallel decorative light board circuits, and a varistor R8 is connected between the power supply end and the ground end of the 6 parallel decorative light board circuits. The varistor R8 is connected in parallel with all the LED lamps in each of the decorative light board circuits.

[0033] Specifically, Figure 3As shown, each decorative lamp board circuit includes a fifth resistor R6 and a sixth resistor R7, the first ends of the fifth resistor R6 and the sixth resistor R7 are respectively connected to the third pin, the second end of the fifth resistor R6 is respectively connected to the positive electrode of the first light-emitting diode D11 and the positive electrode of the second light-emitting diode D31, the negative electrode of the first light-emitting diode D11 and the negative electrode of the second light-emitting diode D31 are respectively connected to the fourth pin, the second end of the sixth resistor R7 is respectively connected to the positive electrode of the third light-emitting diode D21 and the positive electrode of the fourth light-emitting diode D41, the negative electrode of the third light-emitting diode D21 and the negative electrode of the fourth light-emitting diode D41 are respectively connected to the fourth pin 4, the power supply end is powered by the first power supply voltage connected to the third pin 3, the grounding end is the grounding end connected to the fourth pin 4, and the second switch can control the opening and closing of the LED lights on all decorative lamp board circuits, and can also control the opening time. In the figure, the connection terminal P1 is used to connect other decorative lamp board circuits in parallel.

[0034] When the power supply in the lamp board of this embodiment is crosstalked by the igniter high voltage or other high voltage, the resistance value of the varistor R8 increases, so that the varistor R8 can effectively reduce the high voltage crosstalk and effectively protect the LED lamp on the lamp board from being burned out. At the same time, the first voltage regulator D1 and the second voltage regulator D2 play a dual voltage stabilizing role on the voltage to prevent the high voltage from interfering with and damaging the processing chip of the main control circuit. The power supply end and the ground end are also connected in series with a third capacitor C1, which plays a filtering role.

[0035] The above embodiments only express the concentrated implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A barbecue grill light and igniter control circuit, characterized in that: It includes a main control, a first switch, a second switch, a plurality of parallel decorative light board circuits and a connecting terminal. The main control includes a power supply circuit and a main control circuit. The power supply circuit includes a power supply and a power management circuit of the power supply. The power management circuit is used to convert the voltage of the power supply into the power supply voltage required by each module, including the first power supply voltage. The connecting terminal includes first to fifth pins, the first pin is connected to the power supply, the third pin is connected to the first power supply voltage, and the fifth pin is grounded. The first end of the first switch is connected to the first pin, and the second end of the first switch is connected to the power supply end of the igniter. When the first switch is closed, it provides a working voltage for the igniter. The main control circuit includes a processing chip and a first resistor connected to a first IO port of the processing chip, the other end of the first resistor is also connected to a second resistor, the other end of the second resistor is connected to a first power supply voltage, a connecting line between the first resistor and the second resistor is also connected to a first end of a second switch, and a second end of the second switch is grounded; The second IO port of the processing chip is connected to the conduction control end of a switch tube circuit, the signal input end of the switch tube circuit is connected to the fourth pin, the fourth pin is also connected to the ground through a first capacitor C2 connected in series, the third pin is also connected to each power supply end in each decorative lamp board circuit connected in parallel, and the ground in each decorative lamp board circuit is connected to the fourth pin; Among them, a varistor is also connected between the power supply end and the ground end of the plurality of parallel-connected decorative lamp board circuits, and the varistor is connected in parallel with all the LED lamps in each of the decorative lamp board circuits; The output end of the 3.3V voltage is connected to the cathode of the first voltage regulator tube, and the anode of the first voltage regulator tube is grounded; Wherein, the connecting line between the first resistor and the second resistor is also connected to the negative electrode of the second voltage regulator tube, and the positive electrode of the second voltage regulator tube is grounded; When the second switch is disconnected, the first power supply voltage, the first resistor R1, and the second resistor R2 constitute a circuit for powering the processing chip. Under the control of this signal, the first IO port of the processing chip outputs a high level, and the switch tube Q1 is not turned on. At this time, the internal LED light is in an off state. When the second switch is pressed, the second resistor R2 is pulled down, and the signal input to the first IO port changes. At this time, the processing chip sends an output signal change instruction to the second IO port, from a high level to a low level, the switch tube Q1 is turned on, and all LED lights are on. In addition, when the switch tube Q1 is turned on, the processing chip starts timing. After a certain delay, the second IO port sends a high level signal again, the switch Q1 is turned off, and all LED lights are off.

2. The barbecue grill light and igniter control circuit according to claim 1, characterized in that: The switch tube circuit includes an NMOS tube, a gate of the NMOS tube is connected to a first end of a third resistor R3, a second end of the third resistor R3 is connected to a second IO port of a processing chip, the gate of the NMOS tube is also grounded through a second capacitor C11 connected in series, a source of the NMOS tube is grounded, a drain is connected to a first end of a fourth resistor R5, and a second end of the fourth resistor is connected to a fourth pin.

3. The barbecue grill light and ignition control circuit as claimed in claim 2, characterized in that: The drain of the NMOS tube is also connected to the anode of a diode D3, and the cathode of the diode D3 is connected to the anode of a power supply.

4. The barbecue grill light and ignition control circuit according to claim 1, characterized in that: The first switch and the second switch are respectively provided with indicator light circuits, the third pin is respectively connected to the power supply end of the indicator light circuits in the first switch and the second switch, and the ground of the indicator light circuits is respectively connected to the fourth pin.

5. The barbecue grill light and ignition control circuit according to claim 1, characterized in that: The power supply is an alkaline battery with a voltage of +4.5V to -4.5V, and the power management circuit is used to convert the voltage of the power supply into a voltage of 3.3V.

6. The barbecue grill light and ignition control circuit as claimed in claim 5, characterized in that: The power management circuit includes a power management chip of model LN3406.

7. The barbecue grill light and ignition control circuit according to claim 1, characterized in that: Each decorative lamp panel circuit includes a fifth resistor and a sixth resistor, the first ends of the fifth resistor and the sixth resistor are respectively connected to the third pin, the second end of the fifth resistor is respectively connected to the positive electrode of the first light-emitting diode and the positive electrode of the second light-emitting diode, the negative electrode of the first light-emitting diode and the negative electrode of the second light-emitting diode are respectively connected to the fourth pin, the second end of the sixth resistor is respectively connected to the positive electrode of the third light-emitting diode and the positive electrode of the fourth light-emitting diode, the negative electrode of the third light-emitting diode and the negative electrode of the fourth light-emitting diode are respectively connected to the fourth pin, the power supply end is powered by the first power supply voltage connected to the third pin, and the grounding end is the grounding end connected to the fourth pin.

8. The barbecue grill light and ignition control circuit as claimed in claim 7, characterized in that: A third capacitor C1 is also connected in series between the power supply end and the ground end.

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