Igniter discharge method and device

Abstract

The present application belongs to the field of gas stoves, and discloses an igniter discharge method and device. The method comprises: obtaining the current power supply voltage of the DC power supply in the current ignition cycle; determining the initial duty cycle and 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; starting from the first PWM cycle, determining the target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step and the cycle sequence number of the current PWM cycle, and outputting the PWM signal of the target duty cycle to the boost energy storage circuit to detect the energy storage voltage; if the detected energy storage voltage is greater than or equal to the energy storage voltage threshold or the target duty cycle reaches the preset duty cycle threshold, then in each subsequent PWM cycle, outputting the PWM signal of the target duty cycle to the boost energy storage circuit until the detected energy storage voltage reaches the discharge voltage. The present application can control the ignition frequency of the gas stove within a suitable range.

Description

Technical Field

[0001] The present application relates to the technical field of burner stoves, and in particular to an igniter discharge method and device. Background Art

[0002] At present, the burner stove uses high-voltage discharge for ignition. The burner stove is mostly powered by batteries. The voltage of the battery gradually decreases during operation. The change in voltage will affect the discharge frequency of the high-voltage discharge of the burner stove. In addition, the inductance parameters of the same type of transformer are discrete, resulting in different discharge frequencies corresponding to the same type of transformer, which will also affect the discharge frequency of the high-voltage discharge of the burner stove, resulting in low ignition reliability of the burner stove. Therefore, there is an urgent need for an ignition method with a suitable discharge frequency and high reliability. Summary of the invention

[0003] Based on this, it is necessary to provide an igniter discharge method and device to address the above technical issues.

[0004] In a first aspect, an igniter discharge method is provided, the method being applied to a burner stove, the burner stove comprising a DC power supply and a boost energy storage circuit, the method comprising:

[0005] In the current ignition cycle, obtaining the current power supply voltage of the DC power supply;

[0006] Determining an initial duty cycle and a target duty cycle step size of a pulse width modulation (PWM) signal output to the boost tank circuit according to the current power supply voltage;

[0007] Starting from the first PWM cycle, according to the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle, the target duty cycle corresponding to the current PWM cycle is determined, and within the current PWM cycle, a PWM signal of the target duty cycle is output to the boost tank circuit to detect the energy storage voltage of the boost tank circuit;

[0008] 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 cycle reaches a preset duty cycle threshold, then in each subsequent PWM cycle, a PWM signal of the target duty cycle is output to the boost energy storage circuit until the detected energy storage voltage of the boost energy storage circuit reaches the discharge voltage.

[0009] As an optional implementation, the energy storage voltage threshold is the ratio of the discharge voltage to three under the square root of .

[0010] As an optional implementation, the method further includes:

[0011] If the detected energy storage voltage of the boost energy storage circuit is less than the energy storage voltage threshold and the target duty cycle does not reach the preset duty cycle threshold, the next PWM cycle is entered, and the step of determining the target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle is executed.

[0012] As an optional implementation manner, determining the initial duty cycle and the target duty cycle step of the pulse width modulation (PWM) signal output to the boost tank circuit according to the current power supply voltage includes:

[0013] In the pre-stored correspondence between the initial duty cycle and the power supply voltage, the initial duty cycle corresponding to the current power supply voltage is queried; the target duty cycle step is a preset reference step.

[0014] As an optional implementation manner, determining the initial duty cycle and the target duty cycle step of the pulse width modulation (PWM) signal output to the boost tank circuit according to the current power supply voltage includes:

[0015] In the pre-stored correspondence between the duty cycle step and the power supply voltage, the target duty cycle step corresponding to the current power supply voltage is queried; the initial duty cycle is 0.

[0016] As an optional implementation manner, 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 and the cycle number of the current PWM cycle is:

[0017] X PWM =A PWM +B*Y PWM

[0018] Among them, X PWM represents the target duty cycle, A PWM Indicates the initial duty cycle, B indicates the cycle number of the current PWM cycle, Y PWM Indicates the target duty cycle step.

[0019] In a second aspect, an igniter discharge device is provided, the device is applied to a burner stove, the burner stove comprises a DC power supply and a boost energy storage circuit, the device comprises:

[0020] An acquisition module, used for acquiring the current power supply voltage of the DC power supply in the current ignition cycle;

[0021] A first determination module, configured to determine an initial duty cycle and a target duty cycle step size of a pulse width modulation (PWM) signal output to the boost tank circuit according to the current power supply voltage;

[0022] a second determination module, configured to determine, starting from the first PWM cycle, the target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step and the cycle sequence number of the current PWM cycle, and output a PWM signal of the target duty cycle to the boost tank circuit within the current PWM cycle to detect the energy storage voltage of the boost tank circuit;

[0023] An output module is used to output a PWM signal of the target duty cycle to the boost energy storage circuit in each subsequent PWM cycle 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 cycle reaches a preset duty cycle threshold until the detected energy storage voltage of the boost energy storage circuit reaches a discharge voltage.

[0024] As an optional implementation, the energy storage voltage threshold is the ratio of the discharge voltage to three under the square root of .

[0025] As an optional implementation, the device further includes:

[0026] If the detected energy storage voltage of the boost energy storage circuit is less than the energy storage voltage threshold and the target duty cycle does not reach the preset duty cycle threshold, the next PWM cycle is entered, and the step of determining the target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle is executed.

[0027] As an optional implementation manner, the first determining module is specifically configured to:

[0028] In the pre-stored correspondence between the initial duty cycle and the power supply voltage, the initial duty cycle corresponding to the current power supply voltage is queried; the target duty cycle step is a preset reference step.

[0029] In a third aspect, a computer device is provided, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, and when the processor executes the computer program, the method steps described in the first aspect are implemented.

[0030] In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the method steps described in the first aspect are implemented.

[0031] The present application provides an igniter discharge method and device. The technical solution provided by the embodiment of the present application brings at least the following beneficial effects: when the burner stove performs high-voltage discharge ignition, the initial duty cycle and the target duty cycle step of the pulse width modulation PWM signal output to the boost energy storage circuit are determined according to the current power supply voltage, and in each subsequent PWM cycle, the target duty cycle is determined by increasing the target duty cycle step, and the PWM signal of the target duty cycle is output to the boost energy storage circuit until the energy storage voltage of the boost energy storage circuit reaches the discharge voltage. In this way, the charging time to reach the discharge voltage is controlled by setting the PWM cycle to control the time of the current output by the DC power supply to the boost energy storage circuit, thereby controlling the discharge frequency of the boost energy storage circuit, so that the discharge frequency of the burner stove is controlled within a suitable range, thereby improving the ignition reliability of the burner stove.

[0032] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the structure of a burner stove provided in an embodiment of the present application;

[0035] Figure 2 A flow chart of an igniter discharge method provided in an embodiment of the present application;

[0036] Figure 3 A schematic diagram of a curve relationship between power and discharge duration of a boost energy storage circuit provided in an embodiment of the present application;

[0037] Figure 4 A circuit diagram of a boost energy storage circuit provided in an embodiment of the present application;

[0038] Figure 5 An exemplary flow chart of an igniter discharge method provided in an embodiment of the present application;

[0039] Figure 6 A schematic diagram of the structure of an igniter discharge device provided in an embodiment of the present application;

[0040] Figure 7 A schematic diagram of the structure of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] The igniter discharge method provided in the embodiment of the present application can be applied to burner stoves. Figure 1 This is a schematic diagram of the structure of a burner stove provided in an embodiment of the present application. Figure 1 As shown, the burner stove includes a controller 101 , a DC power supply 102 and a boost energy storage circuit 103 .

[0043] The controller 101 is connected to the DC power supply 102 and the boost energy storage circuit 103, and is used to obtain the current power supply voltage of the DC power supply in the current ignition cycle. And according to the current power supply voltage, the initial duty cycle and the target duty cycle step of the PWM (Pulse Width Modulation) signal output to the boost energy storage circuit are determined. And starting from the first PWM cycle, according to the initial duty cycle, the target duty cycle step and the cycle sequence number of the current PWM cycle, the target duty cycle corresponding to the current PWM cycle is determined, and in the current PWM cycle, a PWM signal with a target duty cycle is output to the boost energy storage circuit to detect 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 cycle reaches the preset duty cycle threshold, then in each subsequent PWM cycle, a PWM signal with a target duty cycle is output to the boost energy storage circuit until the detected energy storage voltage of the boost energy storage circuit reaches the discharge voltage.

[0044] The DC power supply 102 is connected to the boost tank circuit 103 and is used to output a PWM signal to the boost tank circuit 103 according to a target duty cycle corresponding to the PWM cycle.

[0045] The boost tank circuit 103 is used to receive the PWM signal output by the DC power supply 102. When the controller 101 detects that the energy storage voltage of the boost tank circuit 103 reaches the discharge voltage, the controller 101 controls the boost tank circuit 103 to perform high-voltage discharge.

[0046] The following will describe in detail an igniter discharge method provided by an embodiment of the present application in combination with a specific implementation method. Figure 2 A flow chart of an igniter discharge method provided in an embodiment of the present application, such as Figure 2 As shown, the specific steps are as follows:

[0047] Step 201, in the current ignition cycle, obtaining the current power supply voltage of the DC power supply.

[0048] In practice, the burner stove uses high-voltage discharge to ignite. Among them, the burner stove includes a DC power supply and a boost energy storage circuit. Burner stoves are also widely used in households, and they need to be able to ignite when there is a power outage, so it is necessary for the DC power supply of the burner stove to be a battery. Among them, the battery can be single or double. The voltage of high-voltage discharge requires more than 10,000 volts, so the burner stove can be boosted by a two-stage transformer for inverter boosting. As the burner stove is used, the battery power becomes lower, the battery voltage becomes lower, and the voltage provided for ignition in the same time decreases, so the time to reach the high voltage during discharge also increases, resulting in a decrease in the discharge frequency, resulting in a low ignition reliability of the burner stove. The discreteness of the inductance parameters of the same model of transformers and the large differences in burners and stoves will also lead to excessive or too small discharge frequencies. If the discharge frequency is too low, it will be difficult to ignite and easy to explode; if the ignition frequency is too high, the battery power consumption is too large, and the battery life is short, resulting in low ignition reliability of the burner stove. Therefore, in each ignition cycle, it is necessary to obtain the current power supply voltage of the DC power supply, and adjust the discharge frequency of the burner stove according to the current power supply voltage. Therefore, it is necessary to obtain the current power supply voltage of the DC power supply in the current ignition cycle.

[0049] Step 202: Determine an initial duty cycle and a target duty cycle step size of a pulse width modulation (PWM) signal output to the boost tank circuit according to the current power supply voltage.

[0050] In implementation, when the voltage output by the DC power supply to the boost energy storage circuit reaches the discharge voltage, the boost energy storage circuit can perform high-voltage discharge ignition. If the discharge frequency of the burner stove is to be constant, the charging time of the boost energy storage circuit is also constant. That is to say, within a fixed discharge time, the voltage output by the power supply voltage to the boost energy storage circuit needs to reach the discharge voltage, so that the ignition frequency of the burner stove can be controlled within a suitable and fixed range. In order to control the voltage output to the boost energy storage circuit, since the total resistance of the boost energy storage circuit is constant, it is to control the current output to the boost energy storage circuit. As the battery is used in the operation of the burner stove, the voltage of the battery will gradually decrease. If the DC power supply is controlled to output a constant current to the boost energy storage circuit, the voltage of the boost energy storage circuit changes linearly. Since the discharge voltage of the boost energy storage circuit is constant, by controlling the current output by the DC power supply to the boost energy storage circuit, the time for the voltage of the boost energy storage circuit to reach the discharge voltage can be controlled, thereby controlling the discharge frequency. That is to say, the discharge frequency of the burner stove can be controlled by the current output from the DC power supply to the boost energy storage circuit. Therefore, a periodic pulse width modulation PWM method can be used to control the current output from the DC power supply to the boost energy storage circuit. Since the voltage of the boost energy storage circuit needs to reach the ignition voltage within a fixed charging time, the PWM cycle method can be used so that the cycle length of the PWM cycle is also fixed. In this way, the total number of cycles can be determined based on the charging time and a PWM cycle length, making the current control more accurate. In this way, the initial duty cycle and target duty cycle step of the pulse width modulation PWM signal output by the boost energy storage circuit can be determined based on the current power supply voltage. Among them, when the PWM signal is at a high level, the DC power supply is controlled to output current to the boost energy storage circuit, and when the PWM signal is at a low level, it indicates that the DC power supply is controlled not to output current to the boost energy storage circuit. The duty cycle indicates that the duration of the high level is longer than the cycle length of the previous PWM cycle. Therefore, in order to ensure the discharge frequency of the burner stove, it is necessary to control the initial duty cycle and target duty cycle step of the pulse width modulation PWM signal output to the boost tank circuit according to the current power supply voltage of the acquired DC power supply.

[0051] Furthermore, in order to ensure the discharge frequency of the burner stove, there are two ways to determine the initial duty cycle and the target duty cycle step of the pulse width modulation PWM signal output to the boost tank circuit according to the current power supply voltage.

[0052] Method 1: In the pre-stored correspondence between the initial duty cycle and the power supply voltage, the initial duty cycle corresponding to the current power supply voltage is queried, and the target duty cycle step is a preset reference step.

[0053] In practice, in order to ensure the discharge frequency of the burner stove, it is necessary to determine the initial duty cycle according to the current power supply voltage. The technicians determine the initial duty cycle of the burner stove at the appropriate discharge frequency for different power supply voltages of the DC power supply in advance. After that, the burner stove stores the corresponding relationship between the initial duty cycle and the power supply voltage. Based on the current power supply voltage, the burner stove queries the initial duty cycle corresponding to the current power supply voltage in the above corresponding relationship. And the target duty cycle step is a preset reference step.

[0054] Method 2: In the pre-stored correspondence between the duty cycle step and the power supply voltage, the target duty cycle step corresponding to the current power supply voltage is queried, and the initial duty cycle is 0.

[0055] In practice, in order to ensure the discharge frequency of the burner stove, the duty cycle step length needs to be determined according to the current power supply voltage. The technicians determine the duty cycle step length that ensures the burner stove at a suitable discharge frequency for different power supply voltages of the DC power supply in advance. Afterwards, the burner stove stores the corresponding relationship between the duty cycle step length and the power supply voltage. Based on the current power supply voltage, the burner stove queries the target duty cycle step length corresponding to the current power supply voltage in the above corresponding relationship. And the initial duty cycle is 0.

[0056] Step 203, starting from the first PWM cycle, determine the target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle, and output a PWM signal of the target duty cycle to the boost tank circuit within the current PWM cycle to detect the energy storage voltage of the boost tank circuit.

[0057] In the implementation, the pulse width modulation PWM cycle is adopted. Starting from the first PWM cycle, the target duty cycle corresponding to the current PWM cycle is determined according to the obtained initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle. Based on the target duty cycle, in the current PWM cycle, the PWM signal of the target duty cycle is output to the boost energy storage circuit, and the energy storage voltage after the boost energy storage circuit receives the PWM signal of the target duty cycle is detected. This makes the current control in each cycle more accurate and makes it easier to control the discharge frequency within an appropriate range.

[0058] As an optional implementation, according to the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle, the formula for determining the target duty cycle corresponding to the current PWM cycle is:

[0059] X PWM =A PWM +B*Y PWM

[0060] Among them, X PWM represents the target duty cycle, APWM Indicates the initial duty cycle, B indicates the cycle number of the current PWM cycle, Y PWM Indicates the target duty cycle step.

[0061] Step 204, 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 cycle reaches the preset duty cycle threshold, then in each subsequent PWM cycle, a PWM signal with a target duty cycle is output to the boost energy storage circuit until the detected energy storage voltage of the boost energy storage circuit reaches the discharge voltage.

[0062] In implementation, the detected energy storage voltage of the boost energy storage circuit is compared with the pre-acquired energy storage voltage threshold. If the measured energy storage voltage of the boost energy storage circuit is greater than or equal to the energy storage voltage threshold or the target duty cycle reaches the preset duty cycle threshold, then in each subsequent PWM cycle, a PWM signal with a target duty cycle 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 energy storage voltage threshold is the voltage of the boost energy storage circuit when the target duty cycle reaches the preset duty cycle threshold. The preset duty cycle threshold is less than the maximum duty cycle of 1. After a large number of experiments, the technicians have measured that when half of the charging time has passed, the target duty cycle reaches the maximum duty cycle. When the target duty cycle reaches the maximum duty cycle, in each subsequent PWM cycle, a PWM signal with a constant duty cycle is output to the boost energy storage circuit until the detected energy storage voltage of the boost energy storage circuit reaches the discharge voltage. Because, when half of the discharge time has passed, the target duty cycle reaches the maximum duty cycle, that is, the boost tank circuit reaches the energy storage threshold of the energy storage voltage threshold. And in the subsequent half of the discharge time, the current and voltage corresponding to the duty cycle corresponding to the PWM signal are output to the boost tank circuit. Figure 3 As shown, Figure 3 A schematic diagram of the relationship between power and discharge duration of a boost energy storage circuit provided in an embodiment of the present application. When the first PWM cycle outputs a PWM signal with an initial duty cycle to the boost energy storage circuit, and then adjusts the target duty cycle to a preset duty cycle threshold with a target duty cycle step, when half the discharge duration (t / 2) is reached, after the energy storage voltage threshold is reached, a corresponding PWM signal is output to the boost energy storage circuit with a constant PWM signal with a preset duty cycle threshold. The power (P) curve first increases linearly and then becomes constant.

[0063] Furthermore, when a DC power supply is added to the inductor (transformer primary), the current changes linearly with time. The battery is equivalent to a voltage source connected in series with an internal resistor, and the inductor also has a DC resistance. The formula is converted into the voltage on the inductor V1(t) = Vbat-i(t)*r = L*di / dt. Among them, 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 on the inductor. Due to the discreteness of the transformer, L has a deviation. When Vbat and r are constant, L becomes smaller and I becomes larger. At this time, the time needs to be reduced to ensure constant power in one cycle. Therefore, the PWM duty cycle becomes smaller, and vice versa. As the battery is used for a longer time, the energy decreases, Vbat becomes smaller, and r becomes larger. When PWM is constant, the ignition frequency will change with the inductor and also with the battery.

[0064] According to the inductor energy storage formula W = 1 / 2LI 2 , the current increases linearly. When the voltage and inductance L are constant, the current is proportional to the PWM signal. Because the output power of the transformer of the boost tank circuit is equal to the input power of the capacitor of the boost tank circuit. In the rising PWM stage, w1+w2+…+wn=1 / 2CU 储能电压阈值 2. wn=n*1 / 2*L*i 2 i is the current generated per unit PWM, and n is the period number of the PWM cycle. Therefore, 1 / 2CU 储能电压阈值 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 In the stop stepping stage n*m*1 / 2*L*i 2 =1 / 2CU 放电电压 2-1 / 2CU 储能电压阈值 2, m is the total PWM cycle number. When i and L are constant, n and m can be determined. And they are constant values. When i changes due to changes in Vbat and r, i 2 *n is constant, n changes with the formula n*m*1 / 2*L*i 2 =1 / 2CU 放电电压 2-1 / 2CU 储能电压阈值 2, it is concluded that m is related to L and remains unchanged. Set the initial PWM according to the empirical value, reduce n, and make m>>n. This method can achieve the effect of stabilizing the ignition frequency. Therefore, the energy storage threshold when the boost tank circuit reaches the energy storage voltage threshold is 1 / 3 of the total energy storage when the boost tank circuit reaches the discharge voltage. According to the capacitance calculation formula W = 1 / 2*C*U 2 It can be seen that 1 / 2*C*U 储能电压阈值 2 =1 / 3*1 / 2*C*U放电电压 2 , so, U 储能电压阈值 =√3 / 3*U 放电电压 .

[0065] For example, the capacitor C2 is charged with constant periodic power, C2 is charged to 150V, and the high-voltage circuit is discharged through the switch. Power determination method: First, set the discharge frequency. In this example, it is set to 10Hz. Assume that the energy is charged to the energy storage voltage threshold u, the energy of each PWM cycle is w, the total energy is 1 / 2CU2, and U is the discharge voltage. The PWM cycle is 10KHz, and the total PWM cycle corresponding to 10HZ is 1000 cycles. Because the power increases from 0 to w in the PWM increase stage, the power of the first half is half of the power of the second half, that is, the first half accounts for 1 / 3 of the total power, that is, 1 / 2CU2 / 3. At this time, the value of u can be calculated, that is, 1 / 2CU2 / 3=1 / 2Cu2. When U=150V, u=86V. Because the transformer coefficient and the resistor voltage divider are constant, the corresponding A / D voltage values ​​of 150V and 86V can be calculated. In the example, when PWM is small, the power generated is small, but the time occupied is long, and w is large, so a small PWM (non-0) is selected as the starting point step, so that the starting power is large, and w becomes smaller in the same 1000 cycles, that is, the charging current becomes smaller, as long as the ignition frequency is controlled within an acceptable range. When the battery voltage and internal resistance are too large, in order to maintain the ignition frequency, the ignition current must be increased. In order to limit the current, the maximum PWM value can be set according to the battery voltage, and the ignition frequency will become smaller.

[0066] Furthermore, if the detected energy storage voltage of the boost energy storage circuit is less than the energy storage voltage threshold and the target duty cycle does not reach the preset duty cycle threshold, the next PWM cycle is entered, and the step of determining the target duty cycle corresponding to the current PWM cycle is executed based on the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle.

[0067] In the implementation, the detected energy storage voltage of the boost energy storage circuit is compared with the pre-acquired energy storage voltage threshold. If the detected energy storage voltage of the boost energy storage circuit is less than the energy storage voltage threshold and the target duty cycle does not reach the preset duty cycle threshold, the cycle number of the current PWM cycle is increased by one to enter the next PWM cycle. And the step of determining the target duty cycle corresponding to the current PWM cycle is performed according to the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle.

[0068] Figure 4 A circuit diagram of a boost energy storage circuit provided in an embodiment of the present application. Figure 4As shown, the circuit diagram includes a 3V DC power supply and a boost energy storage circuit. The boost energy storage circuit includes 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 input of Q2 is PWM. According to the transformer boost parameters, the frequency is 8KHz, the target duty cycle is adjustable, and it is started with a PWM signal of the initial duty cycle, a pulse current is generated in the primary of T1, and a boost is generated through T1 flyback. D1 rectifies and charges C2. D3 and C1 rectify and filter to generate a voltage proportional to C2, and divide the voltage to AD detection through R1 and R4. First, due to the discreteness of the transformer inductance parameters, the PWM signal of the initial duty cycle generates a pulse boost voltage at the 5th PIN of T1. The higher the target duty cycle, the faster the rate of rise of the C2 charging voltage, and vice versa. When C2 is charged to the ignition voltage, it can be seen from the ratio that the A / D detection reaches the threshold and controls the discharge of C2. The ignition frequency is calculated by the timer, and the PWM is adjusted by the ignition frequency deviation, so that the ignition frequency in the next cycle is closer to the set discharge frequency. When the battery voltage drops, the charging rate is maintained unchanged by changing the PWM signal of the initial duty cycle to ensure the stability of the ignition frequency. When there is a deviation in the ignition frequency, the target duty cycle is adjusted cycle by cycle to make the discharge frequency close to the preset frequency.

[0069] Figure 5 This is an example flow chart of an igniter discharge method provided in an embodiment of the present application. Figure 5 shown.

[0070] Step 501, in the current ignition cycle, obtaining the current power supply voltage of the DC power supply.

[0071] Step 502: Determine the minimum duty cycle and target duty cycle step size of the pulse width modulation (PWM) signal output to the boost tank circuit according to the current power supply voltage.

[0072] Step 503: In the first PWM cycle, a PWM signal with a minimum duty cycle is output to the boost tank circuit, and the tank voltage of the boost tank circuit is detected.

[0073] Step 504: if the energy storage voltage of the boost energy storage circuit is less than the energy storage voltage threshold, then enter the next PWM cycle.

[0074] Step 505, determining the target duty cycle corresponding to the current PWM cycle according to the minimum duty cycle, the target duty cycle step size and the cycle number of the current PWM cycle, and outputting a PWM signal of the target duty cycle to the boost tank circuit within the current PWM cycle to detect the energy storage voltage of the boost tank circuit.

[0075] 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 cycle reaches a preset duty cycle threshold, then stop increasing the target duty cycle step.

[0076] Step 507: In each subsequent PWM cycle, a PWM signal with a target duty cycle is output to the boost tank circuit until the detected energy storage voltage of the boost tank circuit reaches the discharge voltage.

[0077] Step 508: When the detected energy storage voltage of the boost energy storage circuit reaches the discharge voltage, the boost energy storage circuit is controlled to discharge.

[0078] Steps 501 to 508 are repeatedly performed until the burner stove is ignited successfully.

[0079] The embodiment of the present application provides an igniter discharge method, when the burner stove performs high-voltage discharge ignition, the initial duty cycle and target duty cycle step of the pulse width modulation PWM signal output to the boost energy storage circuit are determined according to the current power supply voltage, and in each subsequent PWM cycle, the target duty cycle is determined by increasing the target duty cycle step, and the PWM signal of the target duty cycle is output to the boost energy storage circuit until the energy storage voltage of the boost energy storage circuit reaches the discharge voltage. In this way, the charging time to reach the discharge voltage is controlled by setting the PWM cycle to control the time of the current output by the DC power supply to the boost energy storage circuit, thereby controlling the discharge frequency of the boost energy storage circuit, so that the discharge frequency of the burner stove is controlled within a suitable range, thereby improving the ignition reliability of the burner stove.

[0080] It should be understood that although Figure 2 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 2 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0081] It can be understood that the same / similar parts between the various embodiments of the above method in this specification can refer to each other, and each embodiment focuses on the differences from other embodiments. For related points, please refer to the description of other method embodiments.

[0082] The present application also provides an igniter discharge device, such as Figure 6As shown, the device comprises:

[0083] The acquisition module 601 is used to acquire the current power supply voltage of the DC power supply in the current ignition cycle;

[0084] A first determination module 602, configured to determine an initial duty cycle and a target duty cycle step size of a pulse width modulation (PWM) signal output to the boost tank circuit according to the current power supply voltage;

[0085] The second determination module 603 is used to determine the target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step and the cycle sequence number of the current PWM cycle starting from the first PWM cycle, and output the PWM signal of the target duty cycle to the boost tank circuit within the current PWM cycle to detect the energy storage voltage of the boost tank circuit;

[0086] The output module 604 is used to output a PWM signal of the target duty cycle to the boost energy storage circuit in each subsequent PWM cycle 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 cycle reaches a preset duty cycle threshold until the detected energy storage voltage of the boost energy storage circuit reaches the discharge voltage.

[0087] As an optional implementation, the energy storage voltage threshold is the ratio of the discharge voltage to three under the square root of .

[0088] As an optional implementation, the device further includes:

[0089] An execution module is used to enter the next PWM cycle if the detected energy storage voltage of the boost energy storage circuit is less than the energy storage voltage threshold and the target duty cycle does not reach a preset duty cycle threshold, and execute the step of determining the target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle.

[0090] As an optional implementation manner, the first determining module 602 is specifically configured to:

[0091] In the pre-stored correspondence between the initial duty cycle and the power supply voltage, the initial duty cycle corresponding to the current power supply voltage is queried; the target duty cycle step is a preset reference step.

[0092] The embodiment of the present application provides an igniter discharge device. When the burner stove performs high-voltage discharge ignition, the initial duty cycle and target duty cycle step of the pulse width modulation PWM signal output to the boost energy storage circuit are determined according to the current power supply voltage, and in each subsequent PWM cycle, the target duty cycle is determined by increasing the target duty cycle step, and the PWM signal of the target duty cycle is output to the boost energy storage circuit until the energy storage voltage of the boost energy storage circuit reaches the discharge voltage. In this way, the charging time to reach the discharge voltage is controlled by setting the PWM cycle to control the time of the current output by the DC power supply to the boost energy storage circuit, thereby controlling the discharge frequency of the boost energy storage circuit, so that the discharge frequency of the burner stove is controlled within a suitable range, thereby improving the ignition reliability of the burner stove.

[0093] The specific definition of the igniter discharge device can be found in the definition of the igniter discharge method above, which will not be repeated here. Each module in the above-mentioned igniter discharge device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0094] In one embodiment, a computer device is provided, such as Figure 7 As shown, it includes a memory and a processor, the memory stores a computer program that can be run on the processor, and the processor implements the above-mentioned igniter discharge method steps when executing the computer program.

[0095] In one embodiment, a computer-readable storage medium stores a computer program, which implements the steps of the above-mentioned igniter discharge method when executed by a processor.

[0096] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. 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. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0097] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0098] It should also be 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 used for display, data for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0099] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0100] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An igniter discharge method, characterized in that: The method is applied to a burner stove, the burner stove comprises a DC power supply and a boost energy storage circuit, and the method comprises: In the current ignition cycle, obtaining the current power supply voltage of the DC power supply; According to the current power supply voltage, an initial duty cycle and a target duty cycle step of a pulse width modulation (PWM) signal output to the boost tank circuit are determined, and the steps of performing this step are: in the pre-stored correspondence between the duty cycle step and the power supply voltage, querying the target duty cycle step corresponding to the current power supply voltage; the initial duty cycle is 0; Starting from the first PWM cycle, the target duty cycle corresponding to the current PWM cycle is determined according to the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle, and within the current PWM cycle, a PWM signal of the target duty cycle is output to the boost tank circuit, the energy storage voltage of the boost tank circuit is detected, and 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 and the cycle number of the current PWM cycle is: X PWM =A PWM +B×Y PWM ; Among them, X PWM represents the target duty cycle, A PWM Indicates the initial duty cycle, B indicates the cycle number of the current PWM cycle, Y PWM Indicates the target duty cycle step; 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 cycle reaches a preset duty cycle threshold, then in each subsequent PWM cycle, a PWM signal of the target duty cycle is output to the boost energy storage circuit until the detected energy storage voltage of the boost energy storage circuit reaches the discharge voltage.

2. The method according to claim 1, characterized in that The energy storage voltage threshold is the ratio of the discharge voltage to three under the square root.

3. The method according to claim 1, characterized in that The method further comprises: If the detected energy storage voltage of the boost energy storage circuit is less than the energy storage voltage threshold and the target duty cycle does not reach the preset duty cycle threshold, the next PWM cycle is entered, and the step of determining the target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle is executed.

4. An igniter discharge device, characterized in that: The device is applied to a burner stove, the burner stove comprises a DC power supply and a boost energy storage circuit, and the device comprises: An acquisition module, used for acquiring the current power supply voltage of the DC power supply in the current ignition cycle; The first determination module is used to determine the initial duty cycle and target duty cycle step of the pulse width modulation (PWM) signal output to the boost tank circuit according to the current power supply voltage, and the steps of executing this step are: in the pre-stored correspondence between the duty cycle step and the power supply voltage, query the target duty cycle step corresponding to the current power supply voltage; the initial duty cycle is 0; The second determination module is used to determine the target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle starting from the first PWM cycle, and output the PWM signal of the target duty cycle to the boost tank circuit within the current PWM cycle, detect the energy storage voltage of the boost tank circuit, and execute the step of determining the target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle. The formula is: X PWM =A PWM +B×Y PWM ; Among them, X PWM represents the target duty cycle, A PWM Indicates the initial duty cycle, B indicates the cycle number of the current PWM cycle, Y PWM Indicates the target duty cycle step; An output module is used to output a PWM signal of the target duty cycle to the boost energy storage circuit in each subsequent PWM cycle 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 cycle reaches a preset duty cycle threshold until the detected energy storage voltage of the boost energy storage circuit reaches a discharge voltage.

5. The device according to claim 4, characterized in that The energy storage voltage threshold is the ratio of the discharge voltage to three under the square root.

6. The device according to claim 4, characterized in that The device also includes: If the detected energy storage voltage of the boost energy storage circuit is less than the energy storage voltage threshold and the target duty cycle does not reach the preset duty cycle threshold, the next PWM cycle is entered, and the step of determining the target duty cycle corresponding to the current PWM cycle according to the initial duty cycle, the target duty cycle step and the cycle number of the current PWM cycle is executed.

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