CN115978580A - Igniter discharging method and device - Google Patents

Abstract

The application belongs to the field of gas cookers, and discloses an igniter discharging method and device. The method comprises the following steps: acquiring the current power supply voltage of the direct current power supply in the current ignition period; determining an initial duty ratio and a target duty ratio step length of a Pulse Width Modulation (PWM) signal output to a boost energy storage circuit according to the current power supply voltage; starting from a first PWM period, determining a target duty ratio corresponding to the current PWM period according to the initial duty ratio, the target duty ratio step length and the period sequence number of the current PWM period, outputting a PWM signal of the target duty ratio to the boost energy storage circuit, and detecting energy storage voltage; and if the detected energy storage voltage is greater than or equal to the energy storage voltage threshold or the target duty ratio reaches a preset duty ratio threshold, outputting a PWM signal of the target duty ratio to the boost energy storage circuit in each subsequent PWM period until the detected energy storage voltage reaches the discharge voltage. By adopting the method and the device, the ignition frequency of the burner stove can be controlled in a proper range.

Description

Igniter discharging method and device

Technical Field

The application relates to the technical field of gas burners and cookers, in particular to a method and a device for discharging an igniter.

Background

At present, the burner cookers are ignited by means of high-voltage discharge. The gas stove is mainly powered by batteries, the voltage of the batteries is gradually reduced in the working process, and the discharge frequency of high-voltage discharge of the gas stove is influenced by the change of the voltage. In addition, inductance parameters of transformers of the same type have discreteness, so that the transformers of the same type correspond to different discharge frequencies, the discharge frequency of high-voltage discharge of the gas cooker is also influenced, and the ignition reliability of the gas cooker is low. Therefore, there is a need for a reliable igniter ignition method with a suitable discharge frequency.

Disclosure of Invention

In view of the above, it is desirable to provide an igniter discharging method and apparatus.

In a first aspect, there is provided a method of igniter discharge, the method being applied to a burner hob including a dc power supply and a boost energy storage circuit, the method comprising:

acquiring the current power supply voltage of the direct current power supply in the current ignition period;

determining an initial duty ratio and a target duty ratio step length of a Pulse Width Modulation (PWM) signal output to the boost energy storage circuit according to the current power supply voltage;

starting from a first PWM period, determining a target duty ratio corresponding to the current PWM period according to the initial duty ratio, the target duty ratio step length and the period sequence number of the current PWM period, outputting a PWM signal of the target duty ratio to the boost energy storage circuit in the current PWM period, and detecting the energy storage voltage of the boost energy storage circuit;

and if the detected energy storage voltage of the boosting energy storage circuit is greater than or equal to the energy storage voltage threshold value or the target duty ratio reaches a preset duty ratio threshold value, outputting a PWM signal of the target duty ratio to the boosting energy storage circuit in each subsequent PWM period until the detected energy storage voltage of the boosting energy storage circuit reaches a discharge voltage.

As an alternative embodiment, the energy storage voltage threshold is a ratio of the discharge voltage to three under the root sign.

As an optional implementation, the method further comprises:

and entering the next PWM cycle if the detected energy storage voltage of the boosting energy storage circuit is smaller than the energy storage voltage threshold and the target duty ratio does not reach a preset duty ratio threshold, and executing the step of determining the target duty ratio corresponding to the current PWM cycle according to the initial duty ratio, the target duty ratio step length and the cycle sequence number of the current PWM cycle.

As an optional implementation, the determining an initial duty cycle and a target duty cycle step of the pulse width modulation PWM signal output to the boost energy storage circuit according to the current power supply voltage includes:

inquiring the initial duty ratio corresponding to the current power supply voltage in a pre-stored corresponding relation between the initial duty ratio and the power supply voltage; the target duty cycle step length is a preset reference step length.

As an optional implementation, the determining an initial duty cycle and a target duty cycle step of the pulse width modulation PWM signal output to the boost energy storage circuit according to the current power supply voltage includes:

inquiring the target duty cycle step length corresponding to the current power supply voltage in a pre-stored corresponding relation between the duty cycle step length and the power supply voltage; the initial duty cycle is 0.

As an optional implementation manner, the formula for determining the target duty ratio corresponding to the current PWM period according to the initial duty ratio, the target duty ratio step size, and the cycle number of the current PWM period is as follows:

X _PWM ＝A _PWM +B*Y _PWM

wherein X _PWM Represents the target duty cycle, A _PWM Representing the initial duty cycle, B representing the cycle number of the current PWM cycle, Y _PWM Representing objectsDuty cycle step size.

In a second aspect, there is provided an igniter discharge device for use in a burner hob including a dc power supply and a boost energy storage circuit, the device comprising:

the acquisition module is used for acquiring the current power supply voltage of the direct-current power supply in the current ignition period;

the first determining module is used for determining the initial duty ratio and the target duty ratio step length of the Pulse Width Modulation (PWM) signal output to the boost energy storage circuit according to the current power supply voltage;

the second determining module is used for determining a target duty ratio corresponding to the current PWM period from a first PWM period according to the initial duty ratio, the target duty ratio step length and the period sequence number of the current PWM period, outputting a PWM signal of the target duty ratio to the boost energy storage circuit in the current PWM period, and detecting the energy storage voltage of the boost energy storage circuit;

and the output module is used for outputting a PWM signal of the target duty ratio to the boosting energy storage circuit in each subsequent PWM period until the detected energy storage voltage of the boosting energy storage circuit reaches the discharge voltage if the detected energy storage voltage of the boosting energy storage circuit is greater than or equal to the energy storage voltage threshold or the target duty ratio reaches the preset duty ratio threshold.

As an alternative embodiment, the energy storage voltage threshold is a ratio of the discharge voltage to three under the root sign.

As an optional implementation, the apparatus further comprises:

and if the detected energy storage voltage of the boost energy storage circuit is smaller than the energy storage voltage threshold value and the target duty ratio does not reach a preset duty ratio threshold value, entering the next PWM period, and executing the step of determining the target duty ratio corresponding to the current PWM period according to the initial duty ratio, the target duty ratio step length and the period sequence number of the current PWM period.

As an optional implementation manner, the first determining module is specifically configured to:

inquiring the initial duty ratio corresponding to the current power supply voltage in a pre-stored corresponding relation between the initial duty ratio and the power supply voltage; the target duty cycle step length is a preset reference step length.

In a third aspect, a computer device is provided, comprising a memory having stored thereon a computer program operable on a processor, and the processor when executing the computer program, performs the method steps according to the first aspect.

In a fourth aspect, a computer-readable storage medium is provided, having stored thereon a computer program which, when being executed by a processor, carries out the method steps of the first aspect.

The application provides an igniter discharging method and device, and the technical scheme provided by the embodiment of the application at least has the following beneficial effects: when the gas stove is subjected to high-voltage discharge ignition, determining the initial duty ratio and the target duty ratio step length of a Pulse Width Modulation (PWM) signal output to the boost energy storage circuit according to the current power supply voltage, determining the target duty ratio by increasing the target duty ratio step length in each subsequent PWM period, and outputting the PWM signal of the target duty ratio to the boost energy storage circuit until the energy storage voltage of the boost energy storage circuit reaches the discharge voltage. Therefore, the charging time reaching the discharge voltage is controlled by setting the PWM period to control the time of the current output from the direct current power supply to the boost energy storage circuit, so that the discharge frequency of the boost energy storage circuit is controlled, the discharge frequency of the gas cooker is controlled in a proper range, and the ignition reliability of the gas cooker is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a burner cooker provided in an embodiment of the present application;

FIG. 2 is a flow chart of a method of discharging an igniter provided in accordance with an embodiment of the present disclosure;

fig. 3 is a schematic diagram illustrating a relationship between power and discharge duration of a boost energy storage circuit according to an embodiment of the present disclosure;

fig. 4 is a circuit diagram of a boost energy storage circuit according to an embodiment of the present disclosure;

FIG. 5 is a flowchart illustrating an exemplary method of discharging an igniter provided in accordance with an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of an igniter discharge device according to an exemplary embodiment of the disclosure;

fig. 7 is a schematic structural diagram of a computer device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

The igniter discharging method provided by the embodiment of the application can be applied to a burner cooker. Fig. 1 is a schematic structural diagram of a burner cooker provided in an embodiment of the present application. As shown in fig. 1, the burner hob includes a controller 101, a dc power supply 102 and a boost energy storage circuit 103.

And the controller 101 is connected with the direct current power supply 102 and the boost energy storage circuit 103, and is used for acquiring the current power supply voltage of the direct current power supply in the current ignition period. And determining the initial duty ratio and the target duty ratio step length of a PWM (Pulse Width Modulation) signal output to the boost energy storage circuit according to the current power supply voltage. And starting from the first PWM period, determining a target duty ratio corresponding to the current PWM period according to the initial duty ratio, the target duty ratio step length and the period sequence number of the current PWM period, outputting a PWM signal of the target duty ratio to the boost energy storage circuit in the current PWM period, and detecting the energy storage voltage of the boost energy storage circuit. Further, if the detected energy storage voltage of the boost energy storage circuit is greater than or equal to the energy storage voltage threshold or the target duty ratio reaches the preset duty ratio threshold, in each subsequent PWM period, a PWM signal of the target duty ratio is output to the boost energy storage circuit until the detected energy storage voltage of the boost energy storage circuit reaches the discharge voltage.

The dc power supply 102 is connected to the boost tank 103, and outputs a PWM signal to the boost tank 103 in accordance with a target duty ratio corresponding to a PWM period.

And the boost energy storage circuit 103 is configured to receive the PWM signal output by the dc power supply 102, and when the controller 101 detects that the energy storage voltage of the boost energy storage circuit 103 reaches the discharge voltage, control the boost energy storage circuit 103 to perform high-voltage discharge.

An igniter discharging method provided in the embodiments of the present application will be described in detail below with reference to specific embodiments, and fig. 2 is a flowchart of an igniter discharging method provided in the embodiments of the present application, as shown in fig. 2, and includes the following specific steps:

step 201, in the current ignition cycle, the current power supply voltage of the dc power supply is obtained.

In the implementation, the burner cookers are ignited by means of high-voltage discharge. The gas stove comprises a direct-current power supply and a boosting energy storage circuit. The gas stove is widely used in households, and ignition is required when power is cut off, so that a direct-current power supply of the gas stove is necessary to be a battery. Wherein, the battery can adopt a single section or a double section. The voltage of high-voltage discharge needs more than ten thousand volts, so the combustion burner cooker can be boosted in an inversion boosting mode through a two-stage transformer. When the battery is used along with the work of the gas stove, the electric quantity of the battery becomes lower, the voltage of the battery becomes lower, and the voltage provided for ignition in the same time is reduced, so that the time length of reaching the high voltage during discharging is also longer, the discharging frequency is reduced, and the ignition reliability of the gas stove is lower. The dispersion of inductance parameters of transformers of the same type and the large difference of gas burners and cookers can cause the over-large or over-small discharge frequency and the over-low discharge frequency, difficult ignition and easy explosion; the ignition frequency is too high, the power consumption of the battery is too large, the service time of the battery is short, and the ignition reliability of the gas burner cooker is low. Therefore, in each ignition cycle, the current power supply voltage of the dc power supply needs to be obtained, and the discharge frequency of the burner cooker is adjusted according to the current power supply voltage. Therefore, it is necessary to obtain the current power supply voltage of the dc power supply at the current ignition cycle.

Step 202, according to the current power supply voltage, determining the initial duty ratio and the target duty ratio step length of the Pulse Width Modulation (PWM) signal output to the boost energy storage circuit.

In implementation, when the voltage output by the dc power supply to the boost tank circuit reaches the discharge voltage, the boost tank circuit may perform high-voltage discharge ignition. If the discharge frequency of the burner stove is required to be constant, the charging time of the boosting energy storage circuit is also constant. That is, within a fixed discharge time period, the power supply voltage needs to reach the discharge voltage of the voltage output to the boost energy storage circuit, and the ignition frequency of the gas stove can be controlled within a proper and fixed range. In order to control the voltage output to the boost energy storage circuit, the total resistance of the boost energy storage circuit is constant, so that the current output to the boost energy storage circuit is controlled. The voltage of the battery is gradually reduced along with the working use of the burner kitchen range. If the direct current power supply is controlled to output constant current to the boosting energy storage circuit, the voltage of the boosting energy storage circuit is changed linearly. Because the discharge voltage of the boosting energy storage circuit is constant, the time length for the voltage of the boosting energy storage circuit to reach the discharge voltage can be controlled by controlling the current output by the direct-current power supply to the boosting energy storage circuit, and the discharge frequency is further controlled. That is, the discharge frequency of the burner cooker can be controlled by the current output from the dc power supply to the boost energy storage circuit. Thus, the current of the output of the direct current power supply to the boost energy storage circuit can be controlled by adopting a periodic Pulse Width Modulation (PWM) method. Because the voltage of the boost energy storage circuit needs to reach the ignition voltage within the fixed charging time, the PWM period mode can be adopted, so that the period time of the PWM period is also fixed. Therefore, the total cycle number can be determined according to the charging time length and the PWM cycle time length, so that the current control is more accurate. Therefore, the initial duty ratio and the target duty ratio step length of the pulse width modulation PWM signal output by the boost energy storage circuit can be determined according to the current power supply voltage. When the PWM signal is at a high level, the direct-current power supply is controlled to output current to the boost energy storage circuit, and when the PWM signal is at a low level, the direct-current power supply is controlled not to output current to the boost energy storage circuit. The duty ratio indicates that the duration of the high level is longer than the period duration of the last PWM period. Therefore, in order to ensure the discharge frequency of the gas cooker, it is necessary to control the initial duty ratio and the target duty ratio step length of the pulse width modulation PWM signal output to the boost energy storage circuit according to the obtained current power supply voltage of the dc power supply.

Furthermore, in order to ensure the discharge frequency of the gas cooker, two ways are available for determining the initial duty ratio and the target duty ratio step length of the Pulse Width Modulation (PWM) signal output to the boost energy storage circuit according to the current power supply voltage.

In a first mode, in a pre-stored corresponding relationship between an initial duty ratio and a power supply voltage, an initial duty ratio corresponding to the current power supply voltage is inquired, and a target duty ratio step length is a preset reference step length.

In practice, in order to guarantee the discharge frequency of the burner hob, the initial duty cycle needs to be determined from the current supply voltage. The technician determines in advance the initial duty cycle of the burner hob at a suitable discharge frequency for different supply voltages of the direct current supply. And then, storing the corresponding relation between the initial duty ratio and the power supply voltage by the burner cooker. And inquiring the initial duty ratio corresponding to the current power supply voltage in the corresponding relation based on the current power supply voltage. And the target duty cycle step length is a preset reference step length.

In a second mode, in the pre-stored corresponding relationship between the duty cycle step length and the power supply voltage, the target duty cycle step length corresponding to the current power supply voltage is inquired, and the initial duty cycle is 0.

In practice, to guarantee the discharge frequency of the burner hob, the duty cycle step needs to be determined according to the current supply voltage. The technician determines in advance the duty cycle step length at the appropriate discharge frequency for the burner hob for different supply voltages of the dc supply. And then, the gas burner kitchen range stores the corresponding relation between the duty ratio step length and the power supply voltage. And inquiring the target duty cycle step length corresponding to the current power supply voltage in the corresponding relation based on the current power supply voltage. And, the initial duty cycle is 0.

And 203, starting from the first PWM period, determining a target duty ratio corresponding to the current PWM period according to the initial duty ratio, the target duty ratio step length and the period sequence number of the current PWM period, outputting a PWM signal of the target duty ratio to the boost energy storage circuit in the current PWM period, and detecting the energy storage voltage of the boost energy storage circuit.

In implementation, a mode of Pulse Width Modulation (PWM) period is adopted, and from a first PWM period, a target duty ratio corresponding to the current PWM period is determined according to the obtained initial duty ratio, the target duty ratio step length and the period sequence number of the current PWM period. And based on the target duty ratio, outputting the PWM signal of the target duty ratio to the boost energy storage circuit in the current PWM period, and detecting the energy storage voltage of the boost energy storage circuit after receiving the PWM signal of the target duty ratio. Therefore, the current control in each period is more accurate, and the discharge frequency is easier to control in a proper range.

As an optional implementation manner, according to the initial duty ratio, the target duty ratio step size, and the cycle number of the current PWM cycle, the formula for determining the target duty ratio corresponding to the current PWM cycle is as follows:

X _PWM ＝A _PWM +B*Y _PWM

wherein, X _PWM Represents the target duty cycle, A _PWM Representing the initial duty cycle, B representing the cycle number of the current PWM cycle, Y _PWM Representing the target duty cycle step.

And 204, if the detected energy storage voltage of the boosting energy storage circuit is greater than or equal to the energy storage voltage threshold or the target duty ratio reaches the preset duty ratio threshold, outputting a PWM signal of the target duty ratio to the boosting energy storage circuit in each subsequent PWM period until the detected energy storage voltage of the boosting energy storage circuit reaches the discharge voltage.

In implementation, the detected energy storage voltage of the boost energy storage circuit is compared with a pre-acquired energy storage voltage threshold, and if the detected energy storage voltage of the boost energy storage circuit is greater than or equal to the energy storage voltage threshold or the target duty ratio reaches a preset duty ratio threshold, a PWM signal of the target duty ratio is output to the boost energy storage circuit in each subsequent PWM period until the detected energy storage voltage of the boost energy storage circuit reaches a discharge voltage. The energy storage voltage threshold is the voltage of the boosting energy storage circuit when the target duty ratio reaches a preset duty ratio threshold. Wherein the preset duty cycle threshold is smaller than the maximum duty cycle 1. A skilled person has measured through a number of experiments that the target duty cycle reaches the maximum duty cycle when half the charging duration has elapsed. And when the target duty ratio reaches the maximum duty ratio, outputting a PWM signal with constant duty ratio to the boosting energy storage circuit in each subsequent PWM period until the detected energy storage voltage of the boosting energy storage circuit reaches the discharge voltage. Because, when half of the discharge duration passes, the target duty ratio reaches the maximum duty ratio, that is, the boost energy storage circuit reaches the energy storage threshold of the energy storage voltage threshold. And outputting the corresponding current and voltage at the duty ratio corresponding to the PWM signal to the boost energy storage circuit within the subsequent half of the discharging time. As shown in fig. 3, fig. 3 is a schematic diagram of a relationship curve between power and discharge time of a boost energy storage circuit according to an embodiment of the present disclosure. And when the first PWM period outputs a PWM signal with an initial duty ratio to the boost energy storage circuit, the target duty ratio is adjusted by a preset duty ratio threshold value according to the target duty ratio step length, and when the half discharge time (t/2) is reached and the energy storage voltage threshold value is reached, the PWM signal with the constant preset duty ratio threshold value outputs a corresponding PWM signal to the boost energy storage circuit. The power (P) curve is first linearly increasing and then constant.

Further, when a dc power source is applied to the inductor (transformer primary), the current varies linearly with time. The battery is equivalent to a voltage source which is connected with an internal resistance in series, and the inductor also has a direct current resistance. The formula is converted into the voltage V1 (t) = Vbat-i (t) × r = L × di/dt across the inductor. Where V1 represents the voltage of the inductor, vbat represents the voltage of the dc power supply, L represents the inductor parameter, and i represents the current in the inductor. Due to transformer discreteness, there is a deviation in L. When Vbat and r are constant, L becomes small, I becomes large, and the time is reduced to ensure that the power of one period is constant. The PWM duty cycle becomes smaller, whereas the PWM becomes larger. The battery energy decreases with time, vbat decreases, and r increases. With a constant PWM, the ignition frequency will vary with the inductance and also with the battery.

According to the inductive energy storage formula W =1/2LI ² The current increases linearly, and the voltage and the inductance L are constant, the current is proportional to the PWM signal. Because the output power of the transformer of the boost tank is equal to the input power of the capacitor of the boost tank. In the rising PWM stage, w1+ w2+ … + wn =1/2CU _{Threshold of stored energy voltage} 2。wn＝n*1/2*L*i ² . i is the current generated per unit PWM, and n is the cycle number of the PWM cycle. Thus, there are 1/2CU _{Threshold of energy storage voltage} 2＝1*1/2*L*i ² +2*1/2*L*i ² +…+n1*1/2*L*i ² ＝(1+n)/2*1/2*L*i ² At the stop step stage n m 1/2L i ² ＝1/2CU _{Discharge voltage} 2-1/2CU _{Threshold of stored energy voltage} 2,m is a constant total number of PWM cycles. When i is constant with L, n and m can be determined. And is a constant value. When i changes due to Vbat and r, i changes due to ² * n is constant, n varies with the variation according to the formula n m 1/2l i ² ＝1/2CU _{Discharge voltage} 2-1/2CU _{Threshold of energy storage voltage} 2, obtaining that m is not changed relative to L. Setting the initial PWM according to the empirical value, reducing n to make m>>n is used as the index. The effect of stabilizing the ignition frequency is achieved by this method. Therefore, the energy storage threshold when the boost energy storage circuit reaches the energy storage voltage threshold is 1/3 of the total energy storage when the boost energy storage circuit reaches the discharge voltage. Calculation formula W =1/2 × c × u from capacitance ² As can be seen, 1/2 × C × U _{Threshold of energy storage voltage} ² ＝1/3*1/2*C*U _{Discharge voltage} ² Therefore, the temperature of the molten steel is controlled,U _{threshold of energy storage voltage} ＝√3/3*U _{Discharge voltage} 。

For example, capacitor C2 is charged with constant cycle power, C2 is charged to 150V, and the high voltage circuit is discharged through the switch. The power determination method comprises the following steps: first, the discharge frequency is set, 10Hz in this example, assuming that the charging is to the energy storage voltage threshold u, the energy per PWM cycle is w, the total energy is 1/2CU2, and U is the discharge voltage. The PWM cycle is 10KHz, and 10HZ corresponds to the total PWM cycle of 1000 cycles. Since the power is from 0 to w in the PWM increasing stage, the power of the first half part is half of the power of the second half part, namely the first half part accounts for 1/3 of the total power, namely 1/2CU2/3, when the value of u, namely 1/2CU2/3=1/2Cu2, and U =150V, u =86V can be calculated, and the A/D voltage values corresponding to 150V and 86V can be correspondingly calculated because the transformer coefficient and the resistance voltage division are constant. In the example, since the PWM is smaller, the generated power is smaller and the occupied time is larger, and w is larger, a smaller PWM (other than 0) is selected as the starting point step, so that the starting point power is larger, and the same 1000 cycles w are smaller, that is, the charging current is smaller, as long as the ignition frequency is controlled within the acceptable range. When the voltage and the internal resistance of the battery are overlarge, the ignition frequency is maintained, the ignition current is necessarily increased, and the maximum PWM value can be set according to the voltage of the battery for limiting the current, so that the ignition frequency is reduced.

Further, if the detected energy storage voltage of the boost energy storage circuit is smaller than the energy storage voltage threshold value and the target duty ratio does not reach the preset duty ratio threshold value, entering the next PWM cycle, and executing the step of determining the target duty ratio corresponding to the current PWM cycle according to the initial duty ratio, the target duty ratio step length and the cycle sequence number of the current PWM cycle.

In implementation, the detected energy storage voltage of the boost energy storage circuit is compared with the energy storage voltage threshold value obtained in advance, and if the detected energy storage voltage of the boost energy storage circuit is smaller than the energy storage voltage threshold value and the target duty ratio does not reach the preset duty ratio threshold value, the cycle sequence number of the current PWM cycle is increased by one, and the next PWM cycle is started. And determining the target duty ratio corresponding to the current PWM period according to the initial duty ratio, the target duty ratio step length and the period sequence number of the current PWM period.

Fig. 4 is a circuit diagram of a boost energy storage circuit according to an embodiment of the present disclosure. As shown in fig. 4, the circuit diagram includes a 3V dc power supply and a boost tank circuit. The boosting energy storage circuit comprises a transformer TI, a mos tube Q2, a first diode D1, a second diode D3, a first resistor R1, a second resistor R2, a third resistor R4, a first capacitor C1 and a second capacitor C2. The Q2 input is PWM, according to the transformer step-up parameter, the frequency is 8KHz, the target duty ratio is adjustable, the starting is carried out by the PWM signal with the initial duty ratio, the pulse current is generated at the primary stage of T1, and the step-up is generated by the flyback of T1. D1 rectifies and charges C2. D3, C1 rectifying and filtering to generate a voltage proportional to C2, and dividing the voltage to AD detection through R1 and R4. First, the PWM signal of the initial duty ratio generates a pulse boost voltage at T1 PIN 5 due to the dispersion of the transformer inductance parameter. The higher the target duty cycle, the faster the C2 charging voltage rise rate and vice versa. When C2 is charged to the ignition voltage, the A/D detection reaches a threshold value according to the proportion, and C2 is controlled to discharge. And calculating the ignition frequency through a timer, and adjusting PWM through the ignition frequency deviation to enable the ignition frequency to be closer to the set discharge frequency in the next period. When the voltage of the battery is reduced, the charging rate is kept unchanged by changing the PWM signal of the initial duty ratio, and the stability of the ignition frequency is ensured. And when the ignition frequency has deviation, adjusting the target duty ratio cycle by cycle to enable the discharge frequency to be close to the preset frequency.

Fig. 5 is a flowchart illustrating an example method for discharging an igniter according to an embodiment of the disclosure. As shown in fig. 5.

Step 501, in the current ignition period, obtaining the current power supply voltage of the direct current power supply.

Step 502, according to the current power supply voltage, determining the minimum duty ratio and the target duty ratio step length of the Pulse Width Modulation (PWM) signal output to the boost energy storage circuit.

And 503, in the first PWM period, outputting a PWM signal with the minimum duty ratio to the boost energy storage circuit, and detecting the energy storage voltage of the boost energy storage circuit.

Step 504, if the energy storage voltage of the boost energy storage circuit is smaller than the energy storage voltage threshold, the next PWM cycle is entered.

And 505, determining a target duty ratio corresponding to the current PWM period according to the minimum duty ratio, the target duty ratio step length and the period sequence number of the current PWM period, outputting a PWM signal of the target duty ratio to the boost energy storage circuit in the current PWM period, and detecting the energy storage voltage of the boost energy storage circuit.

In step 506, if the detected energy storage voltage of the boost energy storage circuit is greater than or equal to the energy storage voltage threshold or the target duty ratio reaches the preset duty ratio threshold, the increase of the target duty ratio step length is stopped.

And 507, in each subsequent PWM period, outputting a PWM signal of a target duty ratio to the boost energy storage circuit until the detected energy storage voltage of the boost energy storage circuit reaches the discharge voltage.

And step 508, controlling the boosting energy storage circuit to discharge when the detected energy storage voltage of the boosting energy storage circuit reaches the discharge voltage.

And repeatedly executing the steps 501 to 508 until the ignition of the burner stove is successful.

The embodiment of the application provides an igniter discharging method, when a gas stove performs high-voltage discharging ignition, according to the current power supply voltage, the initial duty ratio and the target duty ratio step length of a Pulse Width Modulation (PWM) signal output to a boosting energy storage circuit are determined, in each subsequent PWM period, the target duty ratio is determined by increasing the target duty ratio step length, and the PWM signal of the target duty ratio is output to the boosting energy storage circuit until the energy storage voltage of the boosting energy storage circuit reaches the discharging voltage. Therefore, the charging time reaching the discharge voltage is controlled by setting the PWM period to control the time of the current output from the direct current power supply to the boost energy storage circuit, so that the discharge frequency of the boost energy storage circuit is controlled, the discharge frequency of the gas cooker is controlled in a proper range, and the ignition reliability of the gas cooker is improved.

It should be understood that, although the steps in the flowchart of fig. 2 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in fig. 2 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.

It is understood that the same/similar parts between the embodiments of the method described above in this specification can be referred to each other, and each embodiment focuses on the differences from the other embodiments, and it is sufficient that the relevant points are referred to the descriptions of the other method embodiments.

Embodiments of the present application also provide an igniter discharging device, as shown in fig. 6, including:

an obtaining module 601, configured to obtain a current power supply voltage of the dc power supply in a current ignition cycle;

a first determining module 602, configured to determine an initial duty cycle and a target duty cycle step of a Pulse Width Modulation (PWM) signal output to the boost energy storage circuit according to the current power supply voltage;

a second determining module 603, configured to determine, from a first PWM cycle, a target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step size, and a cycle number of the current PWM cycle, and output a PWM signal of the target duty cycle to the boost energy storage circuit in the current PWM cycle, so as to detect an energy storage voltage of the boost energy storage circuit;

the output module 604 is configured to, if the detected energy storage voltage of the boost energy storage circuit is greater than or equal to the energy storage voltage threshold or the target duty ratio reaches a preset duty ratio threshold, output a PWM signal of the target duty ratio to the boost energy storage circuit in each subsequent PWM period until the detected energy storage voltage of the boost energy storage circuit reaches the discharge voltage.

As an alternative embodiment, the energy storage voltage threshold is a ratio of the discharge voltage to three under the root sign.

As an optional implementation, the apparatus further comprises:

and the execution module is used for entering the next PWM period if the detected energy storage voltage of the boosting energy storage circuit is smaller than the energy storage voltage threshold and the target duty ratio does not reach a preset duty ratio threshold, and executing the step of determining the target duty ratio corresponding to the current PWM period according to the initial duty ratio, the target duty ratio step length and the period sequence number of the current PWM period.

As an optional implementation manner, the first determining module 602 is specifically configured to:

inquiring the initial duty ratio corresponding to the current power supply voltage in a pre-stored corresponding relation between the initial duty ratio and the power supply voltage; the target duty cycle step length is a preset reference step length.

The embodiment of the application provides an igniter discharging device, when a gas stove performs high-voltage discharging ignition, according to the current power supply voltage, the initial duty ratio and the target duty ratio step length of a Pulse Width Modulation (PWM) signal output to a boosting energy storage circuit are determined, in each subsequent PWM period, the target duty ratio is determined by increasing the target duty ratio step length, and the PWM signal of the target duty ratio is output to the boosting energy storage circuit until the energy storage voltage of the boosting energy storage circuit reaches the discharging voltage. Therefore, the charging time reaching the discharge voltage is controlled by setting the PWM period to control the time of the current output from the direct current power supply to the boost energy storage circuit, so that the discharge frequency of the boost energy storage circuit is controlled, the discharge frequency of the gas cooker is controlled in a proper range, and the ignition reliability of the gas cooker is improved.

For specific limitations of the igniter discharging device, reference may be made to the above limitations of the igniter discharging method, which are not described herein again. The various modules in the igniter discharge device described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, a computer device is provided, as shown in fig. 7, comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, the processor implementing the above-mentioned method steps of igniter discharging when executing the computer program.

In one embodiment, a computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the above-described method of igniter discharging.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), rambus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

It should be further noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for presentation, analyzed data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on differences from other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An igniter discharging method, wherein the method is applied to a burner stove, the burner stove comprises a direct current power supply and a boost energy storage circuit, and the method comprises the following steps:

acquiring the current power supply voltage of the direct current power supply in the current ignition period;

determining an initial duty ratio and a target duty ratio step length of a Pulse Width Modulation (PWM) signal output to the boost energy storage circuit according to the current power supply voltage;

starting from a first PWM period, determining a target duty ratio corresponding to the current PWM period according to the initial duty ratio, the target duty ratio step length and the period sequence number of the current PWM period, outputting a PWM signal of the target duty ratio to the boost energy storage circuit in the current PWM period, and detecting the energy storage voltage of the boost energy storage circuit;

and if the detected energy storage voltage of the boosting energy storage circuit is greater than or equal to the energy storage voltage threshold value or the target duty ratio reaches a preset duty ratio threshold value, outputting a PWM signal of the target duty ratio to the boosting energy storage circuit in each subsequent PWM period until the detected energy storage voltage of the boosting energy storage circuit reaches a discharge voltage.

2. The method of claim 1, wherein the energy storage voltage threshold is a ratio of the discharge voltage at root to three.

3. The method of claim 1, further comprising:

and entering the next PWM cycle if the detected energy storage voltage of the boosting energy storage circuit is smaller than the energy storage voltage threshold and the target duty ratio does not reach a preset duty ratio threshold, and executing the step of determining the target duty ratio corresponding to the current PWM cycle according to the initial duty ratio, the target duty ratio step length and the cycle sequence number of the current PWM cycle.

4. The method of claim 1, wherein determining an initial duty cycle and a target duty cycle step size for a Pulse Width Modulated (PWM) signal output to the boost tank circuit based on the current supply voltage comprises:

inquiring the initial duty ratio corresponding to the current power supply voltage in a pre-stored corresponding relation between the initial duty ratio and the power supply voltage; the target duty cycle step length is a preset reference step length.

5. The method of claim 1, wherein determining an initial duty cycle and a target duty cycle step size of a Pulse Width Modulated (PWM) signal output to the boost tank circuit based on the current supply voltage comprises:

inquiring the target duty cycle step length corresponding to the current power supply voltage in a pre-stored corresponding relation between the duty cycle step length and the power supply voltage; the initial duty cycle is 0.

6. The method of claim 1, wherein the formula for determining the target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step size, and the cycle number of the current PWM cycle is:

X _PWM ＝A _PWM +B*Y _PWM

wherein, X _PWM Represents the target duty cycle, A _PWM Representing the initial duty cycle, B representing the cycle number of the current PWM cycle, Y _PWM Representing the target duty cycle step.

7. An igniter discharging device, wherein the device is applied to a burner cooker, the burner cooker comprises a direct current power supply and a boost energy storage circuit, and the device comprises:

the acquisition module is used for acquiring the current power supply voltage of the direct current power supply in the current ignition period;

the first determining module is used for determining the initial duty ratio and the target duty ratio step length of the Pulse Width Modulation (PWM) signal output to the boost energy storage circuit according to the current power supply voltage;

a second determining module, configured to determine, starting from a first PWM cycle, a target duty cycle corresponding to a current PWM cycle according to the initial duty cycle, the target duty cycle step size, and a cycle number of the current PWM cycle, and output a PWM signal of the target duty cycle to the boost energy storage circuit in the current PWM cycle, so as to detect an energy storage voltage of the boost energy storage circuit;

and the output module is used for outputting a PWM signal of the target duty ratio to the boosting energy storage circuit in each subsequent PWM period until the detected energy storage voltage of the boosting energy storage circuit reaches the discharge voltage if the detected energy storage voltage of the boosting energy storage circuit is greater than or equal to the energy storage voltage threshold or the target duty ratio reaches the preset duty ratio threshold.

8. The apparatus of claim 7, wherein the energy storage voltage threshold is a ratio of the discharge voltage at root to three.

9. The apparatus of claim 7, further comprising:

and entering the next PWM cycle if the detected energy storage voltage of the boosting energy storage circuit is smaller than the energy storage voltage threshold and the target duty ratio does not reach a preset duty ratio threshold, and executing the step of determining the target duty ratio corresponding to the current PWM cycle according to the initial duty ratio, the target duty ratio step length and the cycle sequence number of the current PWM cycle.

10. The apparatus of claim 7, wherein the first determining module is specifically configured to:

inquiring the initial duty ratio corresponding to the current power supply voltage in a pre-stored corresponding relation between the initial duty ratio and the power supply voltage; the target duty cycle step length is a preset reference step length.

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