Electric flame circuit and stove

Abstract

An electric flame burner uses an electric ignition circuit in which an input terminal of a switching power supply circuit is connected to a power supply, an input terminal of a booster circuit is connected to an output terminal of a switching power supply circuit, and an input terminal of an ion needle module is connected to an output terminal of the booster circuit. An output terminal of the ion needle module is close to an arc-striking ion generator, forming an ionization point pair. A power control circuit transmits a PWM signal to the switching power supply circuit, so that the latter outputs a corresponding signal to the booster circuit, which transmits a corresponding signal to the ion needle assembly to control the ionization point pair to achieve ignition through arc-striking, generating a flame with an adjustable output power, thereby simplifying and improving the reliability of the electric ignition circuit.

What is claimed is: 
     
         1 . An electric ignition circuit, comprising:
 a switching power supply circuit having an input terminal used for connecting an external power supply;   a booster circuit having a first input terminal and a second input terminal respectively connected to an output terminal of the switching power supply circuit;   an ion needle assembly comprising an ion needle module and an arc-striking ion generator, wherein an input terminal of the ion needle module is connected to a first output terminal of the booster circuit, and an output terminal of the ion needle module is close to the arc-striking ion generator; the output terminal of the ion needle module forms an ionization point pair with the arc-striking ion generator;   a power control circuit connected to a control terminal of the switching power supply circuit and configured to transmit a pulse width modulation (PWM) signal with a preset duty cycle to the switching power supply circuit, so that the switching power supply circuit outputs a power supply signal corresponding to the preset duty cycle to the booster circuit according to the PWM signal with the preset duty cycle, and the booster circuit transmits a booster power supply signal to the ion needle assembly according to the power supply signal to control the ionization point pair to perform ionization arc-striking.   
     
     
         2 . The electric ignition circuit according to  claim 1 , wherein the power control circuit comprises a processing chip and a power regulation switching circuit; the processing chip is connected to the power regulation switching circuit; and the power regulation switching circuit is used for regulating the preset duty cycle of the PWM signal so that the processing chip transmits the PWM signal with the preset duty cycle to the switching power supply circuit. 
     
     
         3 . The electric ignition circuit according to  claim 2 , wherein the power regulation switching circuit comprises a power regulation switch for regulating the preset duty cycle of the PWM signal; the power regulation switch is a potentiometer or a push-button switch. 
     
     
         4 . The electric ignition circuit according to  claim 2 , wherein the switching power supply circuit comprises a power supply driving circuit and a power amplifier; and wherein an input terminal of the power supply driving circuit is connected to the processing chip, an output terminal of the power supply driving circuit is connected to an input terminal of the power amplifier, and an output terminal of the power amplifier is connected to the booster circuit. 
     
     
         5 . The electric ignition circuit according to  claim 4 , wherein the power supply driving circuit comprises a driving chip, a first drive transformation circuit and a second drive transformation circuit; and wherein an input terminal of the driving chip is coupled to the processing chip, and an output terminal of the driving chip is respectively connected to the first drive transformation circuit and the second drive transformation circuit. 
     
     
         6 . The electric ignition circuit according to  claim 5 , wherein the power amplifier comprises a first switching transistor and a second switching transistor; and wherein a gate electrode of the first switching transistor is connected to a first output terminal of the first drive transformation circuit, a source electrode of the first switching transistor is connected to a power supply, and a drain electrode of the first switching transistor is respectively connected to a second output terminal of the first drive transformation circuit, a source electrode of the second switching transistor and the first input terminal of the booster circuit; a gate electrode of the second switching transistor is connected to a first output terminal of the second drive transformation circuit, and a drain electrode of the second switching transistor is respectively connected to a ground wire and the second input terminal of the booster circuit. 
     
     
         7 . The electric ignition circuit according to  claim 1 , wherein the arc-striking ion generator is provided on a pot ring of an electric fire stove; the pot ring of the electric fire stove is used for supporting a pot to be used, and is fitted to a pot bottom of the pot to be used. 
     
     
         8 . The electric ignition circuit according to  claim 2 , wherein the ion needle assembly further comprises a support mechanism; the ion needle module is provided on the support mechanism; the pot ring of the electric fire stove is provided above the support mechanism and is provided around the ion needle module; and the output terminal of the ion needle module is located below the arc-striking ion generator. 
     
     
         9 . The electric ignition circuit according to  claim 2 , further comprising a power detection circuit; wherein the power detection circuit comprises a voltage transformer, a current transformer, a first signal processing circuit and a second signal processing circuit; and wherein an input terminal of the voltage transformer is connected to the input terminal of the booster circuit, and an output terminal of the voltage transformer is connected to the first signal processing circuit; the first signal processing circuit is connected to the processing chip; an input terminal of the current transformer is connected to the input terminal of the booster circuit, and an output terminal of the current transformer is connected to the second signal processing circuit; and the second signal processing circuit is connected to the processing chip. 
     
     
         10 . An electric fire stove, comprising:
 an electric ignition circuit, comprising:
 a switching power supply circuit having an input terminal used for connecting an external power supply, 
 a booster circuit having a first input terminal and a second input terminal respectively connected to an output terminal of the switching power supply circuit, 
 an ion needle assembly comprising an ion needle module and an arc-striking ion generator, wherein an input terminal of the ion needle module is connected to a first output terminal of the booster circuit, and an output terminal of the ion needle module is close to the arc-striking ion generator; the output terminal of the ion needle module forms an ionization point pair with the arc-striking ion generator, and 
 a power control circuit connected to a control terminal of the switching power supply circuit and configured to transmit a pulse width modulation (PWM) signal with a preset duty cycle to the switching power supply circuit, so that the switching power supply circuit outputs a power supply signal corresponding to the preset duty cycle to the booster circuit according to the PWM signal with the preset duty cycle, and the booster circuit transmits a booster power supply signal to the ion needle assembly according to the power supply signal to control the ionization point pair to perform ionization arc-striking; and 
   a cooking surface suitable for supporting cookware such that the cookware is heated by a plasma flame generated by the electric ignition circuit.   
     
     
         11 . The electric fire stove according to  claim 10 , wherein the cooking surface comprises a ring. 
     
     
         12 . The electric fire stove according to  claim 11 , wherein the arc-striking generator is located on the ring. 
     
     
         13 . The electric ignition circuit according to  claim 10 , wherein the power control circuit comprises a processing chip and a power regulation switching circuit; the processing chip is connected to the power regulation switching circuit; and the power regulation switching circuit is used for regulating the preset duty cycle of the PWM signal so that the processing chip transmits the PWM signal with the preset duty cycle to the switching power supply circuit. 
     
     
         14 . The electric ignition circuit according to  claim 13 , wherein the power regulation switching circuit comprises a power regulation switch for regulating the preset duty cycle of the PWM signal; the power regulation switch is a potentiometer or a push-button switch. 
     
     
         15 . The electric ignition circuit according to  claim 13 , wherein the switching power supply circuit comprises a power supply driving circuit and a power amplifier; and wherein an input terminal of the power supply driving circuit is connected to the processing chip, an output terminal of the power supply driving circuit is connected to an input terminal of the power amplifier, and an output terminal of the power amplifier is connected to the booster circuit. 
     
     
         16 . The electric ignition circuit according to  claim 15 , wherein the power supply driving circuit comprises a driving chip, a first drive transformation circuit and a second drive transformation circuit; and wherein an input terminal of the driving chip is coupled to the processing chip, and an output terminal of the driving chip is respectively connected to the first drive transformation circuit and the second drive transformation circuit. 
     
     
         17 . The electric ignition circuit according to  claim 16 , wherein the power amplifier comprises a first switching transistor and a second switching transistor; and wherein a gate electrode of the first switching transistor is connected to a first output terminal of the first drive transformation circuit, a source electrode of the first switching transistor is connected to a power supply, and a drain electrode of the first switching transistor is respectively connected to a second output terminal of the first drive transformation circuit, a source electrode of the second switching transistor and the first input terminal of the booster circuit; a gate electrode of the second switching transistor is connected to a first output terminal of the second drive transformation circuit, and a drain electrode of the second switching transistor is respectively connected to a ground wire and the second input terminal of the booster circuit. 
     
     
         18 . The electric ignition circuit according to  claim 10 , wherein the arc-striking ion generator is provided on a pot ring of an electric fire stove; the pot ring of the electric fire stove is used for supporting a pot to be used, and is fitted to a pot bottom of the pot to be used. 
     
     
         19 . The electric ignition circuit according to  claim 13 , wherein the ion needle assembly further comprises a support mechanism; the ion needle module is provided on the support mechanism; the pot ring of the electric fire stove is provided above the support mechanism and is provided around the ion needle module; and the output terminal of the ion needle module is located below the arc-striking ion generator. 
     
     
         20 . The electric ignition circuit according to  claim 13 , further comprising a power detection circuit; wherein the power detection circuit comprises a voltage transformer, a current transformer, a first signal processing circuit and a second signal processing circuit; and wherein an input terminal of the voltage transformer is connected to the input terminal of the booster circuit, and an output terminal of the voltage transformer is connected to the first signal processing circuit; the first signal processing circuit is connected to the processing chip; an input terminal of the current transformer is connected to the input terminal of the booster circuit, and an output terminal of the current transformer is connected to the second signal processing circuit; and the second signal processing circuit is connected to the processing chip.