Power supply circuit driving method and electronic heating device thereof

Abstract

An embodiment of the present application discloses a driving method for a power supply circuit and an electronic atomization device thereof, which are used to heat a heating component after modulating a DC power supply voltage into alternating first and second target voltages, thereby suppressing the temperature rise of the heating component, allowing the heating component to be heated evenly, extending the service life of the heating component, and improving the performance of the heating component. The driving method of the power supply circuit includes: providing a power supply circuit, including a microprocessor, a voltage control module and a heating module; the microprocessor is used to control the voltage control module; the voltage control module is used to control the DC power supply voltage to obtain a first target voltage according to a first preset parameter set within a first preset time interval of a first repetition cycle, and to obtain a second target voltage according to a second preset parameter set within a second preset time interval of the first repetition cycle; the heating module is used to heat according to the first target voltage and the second target voltage.

Description

Technical Field

[0001] The present application relates to the field of power supply, and in particular to a driving method of a power supply circuit and an electronic heating device thereof. Background Art

[0002] Electronic heating devices are currently being used in various industries, including medical atomization and the e-cigarette industry. They can not only heat semi-liquid or solid working substances to liquid state, but also heat and atomize liquid working substances into vapor state. The e-cigarette industry encompasses not only traditional e-cigarettes that burn and atomize e-liquid, but also popular low-temperature baking tobacco devices. The working substances can be medications, e-cigarette pastes, e-liquids, low-temperature baking tobacco, and herbs.

[0003] In electronic heating devices, the heating element can be heated using both AC and DC power. In the DC power supply mode, the power supply circuit is extremely simple to drive, typically controlled by a microprocessor. Furthermore, the voltage output to the heating element generally remains constant.

[0004] However, the disadvantage of such a simple power supply method is that when the electronic heating device is powered on, the temperature of the heating component continues to rise rapidly and maintains a high temperature. Such a power supply method can easily cause local carbon deposition on the heating component of the electronic heating device, shortening its service life. Summary of the Invention

[0005] An embodiment of the present application provides a driving method for a power supply circuit and an electronic heating device thereof, which can heat a heating component after modulating a DC power supply voltage into an alternating first target voltage and a second target voltage, thereby suppressing the temperature rise of the heating component, allowing the heating component to be heated evenly, extending the service life of the heating component, and improving the performance of the heating component.

[0006] An embodiment of the present application provides a driving method for a power supply circuit, including:

[0007] Providing a power supply circuit, the power supply circuit including a microprocessor, a voltage control module and a heating module;

[0008] The microprocessor is used to control the voltage control module;

[0009] The voltage control module is configured to control the DC power supply voltage to obtain a first target voltage and a first target current according to a first preset parameter set sent by the microprocessor within a first preset duration of a first repetition cycle in a first preset time interval, and to obtain a second target voltage and a second target current according to a second preset parameter set sent by the microprocessor within a second preset duration of the first repetition cycle, wherein the first repetition cycle includes at least one first preset duration and at least one second preset duration;

[0010] The heating module is configured to perform heating according to the first target voltage, the first target current, the second target voltage, and the second target current.

[0011] Optionally, the first preset parameter set includes a first voltage variation amplitude and a first voltage variation frequency, and the second preset parameter set includes a second voltage variation amplitude and a second voltage variation frequency.

[0012] Optionally, the voltage control module includes a power conversion circuit, which modulates the DC power supply voltage according to the modulation signal sent by the microprocessor and outputs a boost voltage, a buck voltage or a pass-through voltage corresponding to the modulation signal.

[0013] Optionally, the power conversion circuit includes a boost circuit and a buck circuit;

[0014] The boost circuit modulates the DC power supply voltage to obtain the first target voltage and the first target current according to the first preset parameter set sent by the microprocessor within the first preset duration of the first repetition cycle in the first preset time interval, wherein the first target voltage is higher than the DC power supply voltage;

[0015] The step-down circuit modulates the first target voltage to obtain the second target voltage and the second target current according to the second preset parameter set sent by the microprocessor within the second preset duration of the first repetition cycle, and the second target voltage is lower than the first target voltage.

[0016] Optionally, the first repetition period further includes a third preset duration, or the third preset duration to an Nth preset duration, where N≥3, and N represents an ordinal number;

[0017] The boost circuit modulates the DC power supply voltage within the third preset duration of the first repetition cycle in the first preset time interval according to the third preset parameter set sent by the microprocessor to obtain the third target voltage and the third target current;

[0018] or,

[0019] The boost circuit and the buck circuit alternately modulate the DC power supply voltage within the first preset time interval from the third preset duration to the Nth preset duration of the first repetition cycle according to the third preset parameter set to the Nth preset parameter set sent by the microprocessor to obtain the third target voltage, the third target current to the Nth target voltage, and the Nth target current. The third target voltage to the Nth target voltage are all higher than the DC power supply voltage, but the voltage values ​​obtained from the third target voltage to the Nth target voltage are different according to different working modes of the boost circuit and the buck circuit. The first repetition cycle includes at least one of the third preset duration, or at least one of the third preset duration to at least one of the Nth preset duration.

[0020] The heating module is further configured to perform heating according to the third target voltage, the third target current, or according to a range from the third target voltage, the third target current to the Nth target voltage, and the Nth target current.

[0021] Optionally, the third preset parameter set includes a third voltage change amplitude and a third voltage change frequency, and the Nth preset parameter set includes an Nth voltage change amplitude and an Nth voltage change frequency.

[0022] Optionally, the boost circuit modulates the DC power supply voltage within an Ath preset duration of a second repetition cycle in a second preset time interval according to an Ath preset parameter set sent by the microprocessor to obtain an Ath target voltage and an Ath target current;

[0023] The step-down circuit modulates the Bth target voltage according to the Bth preset parameter set sent by the microprocessor within the Bth preset duration of the second repetition period to obtain a Bth target voltage and a Bth target current, wherein the Bth target voltage is lower than the Ath target voltage, and the second repetition period includes at least one of the Ath preset duration and at least one of the Bth preset duration;

[0024] The heating module is further configured to perform heating according to the Ath target voltage, the Ath target current, the Bth target voltage, and the Bth target current.

[0025] Optionally, the Ath preset parameter set includes an Ath voltage change amplitude and an Ath voltage change frequency, and the Bth preset parameter set includes a Bth voltage change amplitude and a Bth voltage change frequency.

[0026] Optionally, the second repetition period further includes a Cth preset duration, or the Cth preset duration to an Mth preset duration, where M≥3, and M represents an ordinal number;

[0027] The boost circuit modulates the DC power supply voltage within the Cth preset duration of the second repetition cycle in the second preset time interval according to a Cth preset parameter set sent by the microprocessor to obtain a Cth target voltage and a Cth target current;

[0028] or,

[0029] The boost circuit and the buck circuit alternately modulate the DC power supply voltage within the Cth preset duration to the Mth preset duration of the second repetition cycle in the second preset time interval, and obtain the Cth target voltage, the Cth target current to the Mth target voltage, and the Mth target current according to the Cth preset parameter set to the Mth preset parameter set sent by the microprocessor. The Cth target voltage to the Mth target voltage are all higher than the DC power supply voltage, but the voltage values ​​obtained from the Cth target voltage to the Mth target voltage are different according to different operating modes of the boost circuit and the buck circuit. The second repetition cycle includes at least one Cth preset duration, or at least one Cth preset duration to at least one Mth preset duration.

[0030] The heating module is further configured to perform heating according to the Cth target voltage and the Cth target current, or according to a range from the Cth target voltage and the Cth target current to the Mth target voltage and the Mth target current.

[0031] Optionally, the Cth preset parameter set includes a Cth voltage change amplitude and a Cth voltage change frequency, and the Mth preset parameter set includes an Mth voltage change amplitude and an Mth voltage change frequency.

[0032] Optionally, the boost circuit and the buck circuit operate alternately in at least one first preset time interval and at least one second preset time interval according to an order of preset time intervals within a preset alternating time length;

[0033] The system operates alternately within at least one of the first preset durations and at least one of the second preset durations according to the order of the preset durations within the preset alternating sub-durations.

[0034] Optionally, the boost circuit and the buck circuit operate alternately within at least one first preset time duration, at least one second preset time duration, and at least one third preset time duration according to the order of the preset time durations within the preset alternating sub-time duration;

[0035] or,

[0036] According to the order of the preset durations within the preset alternating sub-durations, the system operates alternately within at least one of the first preset durations, at least one of the second preset durations, at least one of the third preset durations, to at least one of the Nth preset durations.

[0037] Optionally, the boost circuit and the buck circuit operate alternately within at least one of the Ath preset time lengths and at least one of the Bth preset time lengths according to the order of the preset time lengths within the preset alternating sub-time lengths.

[0038] Optionally, the boost circuit and the buck circuit operate alternately within at least one of the Ath preset time durations, at least one of the Bth preset time durations, and at least one of the Cth preset time durations according to the order of the preset time durations within the preset alternating sub-time durations;

[0039] or,

[0040] According to the order of the preset durations within the preset alternating sub-durations, the system operates alternately within at least one of the Ath preset durations, at least one of the Bth preset durations, at least one of the Cth preset durations, to at least one of the Mth preset durations.

[0041] An embodiment of the present application provides an electronic atomization device, which executes the driving method of the power supply circuit in the aforementioned embodiment.

[0042] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0043] Since the microprocessor is used to control the voltage control module, the voltage control module is used to control the DC power supply voltage within the first preset duration of the first repetition cycle in the first preset time interval, and obtain the first target voltage and the first target current according to the first preset parameter set sent by the microprocessor. Within the second preset duration of the first repetition cycle, the second target voltage and the second target current are obtained according to the second preset parameter set sent by the microprocessor. The first repetition cycle includes at least one first preset duration and at least one second preset duration. Subsequently, the heating module is used to heat according to the first target voltage, the first target current, the second target voltage and the second target current. It can be seen from the above that the first target voltage, the first target current, the second target voltage and the second target current output to the heating module The first target current, the second target voltage and the second target current are different in size, so that the heating component provided with the heating module can be heated by the output voltage and output current that are constantly changing, thereby suppressing the temperature increase of the heating component after the power is turned on, reducing local carbon deposition of the heating component, and because the voltage is sometimes high and sometimes low, the temperature of the heating component can change with the change of voltage, and will not maintain a high temperature continuously, so that the heating component can be heated evenly, which not only extends the service life of the heating component, but also, in the field of electronic cigarettes, such a power supply circuit driving method can also improve the restoration degree of tobacco oil and tobacco paste, and improve the taste of low-temperature baked non-burning tobacco and aerosol after atomization. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the structure of a power supply circuit in an embodiment of the present application;

[0045] Figure 2 This is a timing diagram of a driving method of a power supply circuit in an embodiment of the present application;

[0046] Figure 3 This is a schematic structural diagram of another power supply circuit in an embodiment of the present application;

[0047] Figure 4 This is a timing diagram of a driving method of another power supply circuit in an embodiment of the present application;

[0048] Figure 5 Schematic diagram of temperature changes of a heating component over time in a driving method for a power supply circuit in an embodiment of the present application and a driving method for a traditional power supply circuit;

[0049] Figure 6 This is a comparison diagram of the target voltage output by the driving method of the power supply circuit in the embodiment of the present application and the target voltage output by the driving method of the existing power supply circuit;

[0050] Figure 7 is a circuit diagram of a power conversion circuit in an embodiment of the present application;

[0051] Figure 8 This is a target voltage timing diagram of another driving method for a power supply circuit in an embodiment of the present application;

[0052] Figure 9 This is a target voltage timing diagram of another driving method for a power supply circuit in an embodiment of the present application;

[0053] Figure 10 This is a target voltage timing diagram of another driving method for a power supply circuit in an embodiment of the present application;

[0054] Figure 11 This is a target voltage timing diagram of another driving method for a power supply circuit in an embodiment of the present application;

[0055] Figure 12 This is a target voltage timing diagram of another driving method for a power supply circuit in an embodiment of the present application;

[0056] Figure 13 2 is a target voltage timing diagram of another driving method for a power supply circuit in an embodiment of the present application. DETAILED DESCRIPTION

[0057] The embodiments of the present application provide a driving method for a power supply circuit and an electronic heating device, which are used to heat a heating component after modulating a DC power supply voltage into an alternating first target voltage and a second target voltage, thereby suppressing the temperature rise of the heating component, allowing the heating component to be heated evenly, extending the service life of the heating component, and improving the performance of the heating component.

[0058] The following is a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings. The described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and their technical features can be combined with each other.

[0059] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a power supply circuit in an embodiment of the present application. Figure 2 Target voltage timing diagram of a driving method for a power supply circuit in an embodiment of the present application.

[0060] A driving method of a power supply circuit in an embodiment of the present application is as follows:

[0061] A power supply circuit is provided, which can be used to drive the heating component to heat. The power supply circuit includes a power supply device 101, a microprocessor 102, a voltage control module 103 and a heating module 104;

[0062] The microprocessor 102 may be used to control the voltage control module 103;

[0063] The voltage control module 103 may be configured to control the DC power supply voltage U to obtain a first target voltage U1 and a first target current I1 according to a first preset parameter set sent by the microprocessor 102 within a first preset duration t1 of a first repetition period T1 in a first preset time interval T1′, and to obtain a second target voltage U2 and a second target current I2 according to a second preset parameter set sent by the microprocessor within a second preset duration t2 of the first repetition period T1. The first repetition period T1 includes at least one first preset duration t1 and at least one second preset duration t2.

[0064] The heating module 104 may be configured to perform heating according to a first target voltage U1 , a first target current I1 , a second target voltage U2 , and a second target current I2 .

[0065] It should be noted that, in the embodiment of the present application, the first repetition period T1 may include multiple first preset durations t1 and multiple second preset durations t2.

[0066] It should be noted that the first preset parameter set may include the variation amplitude and frequency of the first voltage U1, and the second preset parameter set may include the variation amplitude and frequency of the second voltage U2. Thus, the voltage control module 103 may control the DC power supply voltage U to obtain U1 and I1 based on the variation amplitude and frequency of U1 sent by the microprocessor 102 during the first preset duration t1 of the first repetition cycle T1 in the first preset time interval T1', and to obtain U2 and I2 based on the variation amplitude and frequency of U2 sent by the microprocessor 102 during the second preset duration t2 of the first repetition cycle T1.

[0067] It should be noted that the electronic heating device includes the above-mentioned power supply device 101 , a microprocessor 102 , a voltage control module 103 and a heating module 104 .

[0068] In addition, the heating module 104 can be set in an electronic atomizer, or in a heating component for low-temperature baking of non-combustion tobacco, or in a medical electronic atomization device, and the specific details are not limited here.

[0069] It should be noted that the first preset time length t1 and the second preset time length t2 may be equal or unequal, and the specific details are not limited here.

[0070] In the driving method of the power supply circuit in the embodiment of the present application, since the microprocessor is used to control the voltage control module, the voltage control module is used to control the DC power supply voltage in the first preset time interval of the first repetition cycle, and obtain the first target voltage and the first target current according to the first preset parameter set sent by the microprocessor. In the second preset time of the first repetition cycle, the second target voltage and the second target current are obtained according to the second preset parameter set sent by the microprocessor. The first repetition cycle includes at least one first preset time and at least one second preset time. Subsequently, the heating module is used to heat according to the first target voltage, the first target current, the second target voltage and the second target current. As can be seen from the above, the output to the heating module The first target voltage, the first target current, and the second target voltage and the second target current of the block are different in size, so that the heating component provided with the heating module can be heated by the output voltage and output current that are constantly changing, thereby suppressing the temperature increase of the heating component after the power is turned on, reducing local carbon deposition of the heating component, and because the voltage is sometimes high and sometimes low, the temperature of the heating component can change with the change of voltage, and will not maintain a high temperature continuously, so that the heating component can be heated evenly, which not only extends the service life of the heating component, but also, in the field of electronic cigarettes, such a power supply circuit driving method can also improve the restoration degree of tobacco oil and tobacco paste, and improve the taste of low-temperature baked non-burning tobacco and aerosol after atomization.

[0071] The above describes a driving method of a power supply circuit in an embodiment of the present application in combination with a structural schematic diagram of a power supply circuit. The following describes a driving method of another power supply circuit in an embodiment of the present application.

[0072] See also Figures 3 to 5 , Figure 3 This is a structural diagram of another power supply circuit in an embodiment of the present application. Figure 4 is a timing diagram of a driving method of another power supply circuit in an embodiment of the present application, Figure 5 Schematic diagram of temperature change over time of the target voltage output in the driving method of the power supply circuit in the embodiment of the present application and the driving method of the traditional power supply circuit. Figure 6 This is a comparison diagram of the target voltage output by the driving method of the power supply circuit in the embodiment of the present application and the target voltage output by the existing driving method of the power supply circuit.

[0073] In the embodiment of the present application, the power supply circuit includes a power supply device 301 , a microprocessor 302 , a power conversion circuit and a heating module 305 .

[0074] The voltage control module may include a power conversion circuit, which may include a boost circuit 303, a buck circuit 304, and a pass-through voltage circuit (not shown). The power conversion circuit modulates the DC power supply voltage U according to the modulation signal sent by the microprocessor 302, and outputs a boost voltage, a buck voltage, or a pass-through voltage corresponding to the modulation signal. The pass-through voltage is a constant output voltage.

[0075] It should be noted that the circuit structure of the power conversion circuit can be designed to switch the power conversion circuit including the boost circuit 303 and the buck circuit 304 to the boost circuit 303 within a preset time period and to the buck circuit 304 within another preset time period. The boost circuit 303 and the buck circuit 304 can also be designed as independent circuit structures respectively, without the need to achieve the boost and buck functions through alternating switching in the same circuit structure. The structural design method of the boost circuit 303 and the buck circuit 304 is not specifically limited here.

[0076] In the embodiment of the present application, the boost circuit 303 can modulate the DC power supply voltage U within the first preset duration t1 of the first repetition period T1 in the first preset time interval T1′ according to the first preset parameter set sent by the microprocessor 302 to obtain U1 and I1, where U1 is higher than the DC power supply voltage U;

[0077] The step-down circuit 304 can modulate U1 to obtain U2 and I2 according to the second preset parameter set sent by the microprocessor 302 within the second preset duration t2 of the first repetition period T1, and U2 is lower than U1.

[0078] It should be noted that the first repetition period T1 may further include a third preset duration t3, and the first repetition period T1 may also include the third preset duration t3 to the Nth preset duration tN, where N≥3, and N represents an ordinal number.

[0079] When the first repetition period T1 also includes a third preset duration t3, the boost circuit 303 can modulate the DC power supply voltage U within the third preset duration t3 of the first repetition period T1 in the first preset time interval T1' according to the third preset parameter set sent by the microprocessor 302 to obtain a third target voltage U3 and a third target current I3.

[0080] It should be noted that, in this embodiment, the step-down circuit 304 can then modulate the DC power supply voltage U within the first preset duration t1 of the first repetition period T1 in the first preset time interval T1' according to the first preset parameter set sent by the microprocessor 302 to obtain the first target voltage U1 and the first target current I1. The boost circuit 303 can also then modulate the DC power supply voltage U within the second preset duration t2 of the second repetition period T2 in the second preset time interval T2' according to the second preset parameter set sent by the microprocessor 302 to obtain the second target voltage U2 and the second target voltage I2. The second target voltage U2 can be lower than the first target voltage U1, or can be equal to the DC power supply voltage U, and the specific details are not limited here.

[0081] When the first repetition period T1 further includes the third preset duration t3 to the Nth preset duration tN, the boost circuit 303 may modulate the DC power supply voltage U within the third preset duration t3 of the first repetition period T1 in the third preset time interval T1′ according to the third preset parameter set sent by the microprocessor 302 to obtain a third target voltage U3 and a third target current I3. The buck circuit 304 may then modulate the DC power supply voltage U within the fourth preset duration t4 of the first repetition period T1 in the first preset time interval T1′ according to the fourth preset parameter set sent by the microprocessor 302 to obtain a fourth target voltage U4 and a fourth target current I4. Alternatively, the buck circuit 304 may then modulate the DC power supply voltage U within the Nth preset duration tN of the first repetition period T1 in the first preset time interval T1′ according to the Nth preset parameter set sent by the microprocessor 302 to obtain an Nth target voltage UN and an Nth target current IN. The specific details are not limited here.

[0082] That is, when the first repetition period T1 also includes the third preset duration t3 to the Nth preset duration tN, the boost circuit 303 and the buck circuit 304 can alternately modulate the DC power supply voltage U within the first preset time interval T1' within the third preset duration t3 to the Nth preset duration tN of the first repetition period T1 according to the third preset parameter set to the Nth preset parameter set sent by the microprocessor, thereby obtaining the third target voltage U3, the third target current I3 to the Nth target voltage UN, and the Nth target current IN. Furthermore, the third target voltage U3 to the Nth target voltage UN are all higher than the DC power supply voltage, but the voltage values ​​obtained by the third target voltage U3 to the Nth target voltage UN vary depending on the different operating modes of the boost circuit 303 and the buck circuit 304.

[0083] It should be noted that the first repetition period T1 includes at least one third preset duration t3, or includes at least one third preset duration t3 to at least one Nth preset duration tN. In other words, the first repetition period T1 may include several third preset durations t3, or include several third preset durations t3 to several Nth preset durations tN. Accordingly, the output target voltage will also vary according to the preset parameter set at different preset durations.

[0084] In the embodiment of the present application, since the output target voltage after modulation by the boost circuit and the buck circuit can vary in size instead of always maintaining a constant voltage and constant current, when the output target voltage is reduced, the current passing through the heating component will be reduced, so that the temperature rise of the heating component after power is turned on can be suppressed. The heating component includes a heating module. Figure 5 As shown, Figure 5 The dotted curve is a temperature change curve of the heating component RLa over time in the existing power supply circuit driving method. The output target voltage Ua of the existing power supply circuit driving method is a constant voltage. Figure 5 It can be seen that the temperature of the curve RLa will rise sharply as time goes by. The other curve is a temperature change curve of the heating component RLb obtained by using the driving method of the power supply circuit in the embodiment of the present application. The solid line curve RLb represents that the output target voltage Ub is modulated to have a voltage amplitude change with step-up and step-down, so the temperature rise of the heating component can be suppressed to a certain extent, and the temperature rise becomes slower. The output target voltages Ua and Ub are as follows: Figure 6 As shown by Figure 6 It can be seen that the output target voltage Ua is a constant voltage, and Ub has a voltage amplitude change of step-up and step-down.

[0085] The following describes in detail the working principles of the boost circuit and the buck circuit, taking a specific power conversion circuit as an example, so that readers can understand how the embodiment of the present application achieves boost and buck within different preset time lengths through a specific power supply circuit driving method, thereby suppressing the temperature increase of the heating component including the heating module.

[0086] See Figure 7 , Figure 7 This is a circuit diagram of the power conversion circuit in the embodiment of the present application. The power conversion circuit is actually a full-bridge circuit. The full-bridge circuit has three operating modes: boost mode, buck mode, and pass-through mode. It can be switched to a boost circuit, a buck circuit, and a pass-through circuit for control. The working principles of these three working circuits are described below:

[0087] 1. The working principle of the boost circuit is as follows:

[0088] Components of the boost circuit: C29, C30, L6, Q9, Q3, C31, C32.

[0089] Component description: C29 and C30 are energy storage and freewheeling capacitors, L6 is an energy storage inductor, Q9 and Q3 are switching devices, and C31 and C32 are filtering and loop capacitors.

[0090] Working Principle: ① Q7 remains off and Q2 remains on. Within a unit cycle, the microprocessor controls Q9 to turn on and Q3 to turn off. The current flowing from the power supply voltage BAT+ passes through L6 and then flows to ground GND through Q9, charging L6 and storing energy. ② After energy storage is completed, the microprocessor controls Q9 to turn off and Q3 to turn on, releasing the energy stored in L6. At this time, the energy stored in L6 and the voltage on the power supply voltage BAT+ are superimposed to form a boost effect. The superimposed boosted voltage is transmitted to the voltage output terminal Vout, and the output target voltage is the boosted voltage.

[0091] During the boost process, the boost voltage value is proportional to the stored energy of control L6.

[0092] After completing the operation of a unit cycle of the boost circuit, the power supply circuit starts to operate within a unit cycle of the buck circuit.

[0093] 2. The working principle of the step-down circuit is as follows:

[0094] Components of the step-down circuit: C29, C30, Q2, Q7, L6, C31, C32.

[0095] Component description: C29 and C30 are energy storage and freewheeling capacitors; L6 is an energy storage inductor; Q7 and Q2 are switching devices; C31 and C32 are filtering and loop capacitors.

[0096] Working Principle: ① Q9 remains off and Q3 remains on. Within a unit cycle, the microprocessor controls the connection between C31, C32, and L6, thereby turning on Q2 and turning off Q7. The power supply voltage BAT+ outputs current to Vout through Q2 and L6, while simultaneously charging and storing energy in L6. ② After energy storage is completed, the microprocessor controls Q2 to turn off and Q7 to turn on, releasing the energy stored in L6. At this point, the energy storage voltage on L6 will be lower than BAT+. The voltage provided by L6 flows through Q7 to the voltage output terminal Vout, and the output target voltage is the stepped-down voltage.

[0097] During the voltage reduction process, the voltage reduction value is proportional to the stored energy of control L6.

[0098] 3. The working principle of the pass-through circuit is as follows:

[0099] A pass-through circuit, capable of transmitting constant unidirectional DC, is a secondary feature of the full-bridge circuit. The microprocessor simply controls Q7 and Q9 to disconnect and Q2 and Q3 to transmit the constant unidirectional power supply voltage BAT+ to the voltage output terminal Vout. The target output voltage is a constant, unchanging unidirectional voltage.

[0100] in addition, Figure 7 In the circuit diagram shown, BOOST H and BOOST L are respectively the high and low levels of the boost, and BUCK are respectively the high and low levels of the buck, and all transistors are NMOS tubes, which will not be described here.

[0101] In the embodiment of the present application, the preset frequency, phase, width, measured effect and the preferred frequency, phase, width, measured effect and other data of Table 1 below were obtained through experimental verification. Please refer to Table 1 below:

[0102] Table 1

[0103]

[0104] As can be seen from Table 1, the parameters of the preset parameter set may include the frequency, phase, and width (duty cycle) of the preset target voltage. The preset frequency range of the target voltage is 0-500 Hz, with a preferred frequency range of 100-300 Hz. Based on the target voltage output within the preferred frequency range, measured experimental data shows that the lifespan of an atomizer equipped with a heating assembly can be increased by 50%-100%, or 0.5 to 1 times, compared to the service life of existing atomizers.

[0105] The preset phase shift range of the target voltage is 0-180°, and the preferred frequency range is 12-30°. The target voltage output based on the preferred voltage phase shift range can reduce the measured power consumption of the electronic atomization device by 8-12%.

[0106] The preset width (duty cycle) of the width is 0-100%, and the preferred preset width is 5-95%. Based on the target voltage outputted by the preferred preset width, the duty cycle can be adjusted to the most suitable range, thereby avoiding the occurrence of dead zones and direct pass between the boost circuit and the buck circuit.

[0107] Through the above description of the working principle of boost and step-up, it can be known how the boost circuit, the buck circuit and the pass-through circuit can realize the increase and decrease of voltage within different preset time lengths, so as to provide the heating module with alternating target voltage and target current after boosting, as well as target voltage and target current after stepping down, and then make the heating module heat accordingly according to the target voltage and target current that are sometimes high and sometimes low, so as to suppress the temperature rise of the heating component including the heating module, so that the heating component can be heated evenly, thereby extending the service life of the heating component and improving the performance of the heating component.

[0108] besides, Figure 7 The R51, R48 and C37 shown are resistors used for shunting, and R39 and R44 are resistors used for filtering. Since they are not directly related to the embodiments of the present application, they will not be described here.

[0109] Furthermore, another embodiment of the embodiment of the present application is described below.

[0110] Please refer to Figure 8 , Figure 8 This is a target voltage timing diagram of another driving method of a power supply circuit in an embodiment of the present application. Figures 1 to 4 Based on the driving method of the power supply circuit shown in FIG. , this embodiment may further include:

[0111] The boost circuit modulates the DC power supply voltage U to obtain an Ath target voltage and an Ath target current according to an Ath preset parameter set sent by the microprocessor within an Ath preset duration tA of a second repetition period T2 in a second preset time interval T2′;

[0112] The step-down circuit modulates the Bth target voltage according to the Bth preset parameter set sent by the microprocessor within the second repetition period T2 to obtain the Bth target voltage and the Bth target current. The Bth target voltage is lower than the Ath target voltage, and the second repetition period T2 includes at least one Ath preset time length tA and at least one Bth preset time length tB.

[0113] It should be noted that the target voltage A and the target voltage B are the same as those mentioned above. Figures 1 to 4 The first target voltage and the second target voltage are different.

[0114] The heating module is further configured to perform heating according to the Ath target voltage, the Ath target current, the Bth target voltage, and the Bth target current.

[0115] It should be noted that the Ath preset parameter set may include the Ath voltage change amplitude and the Ath voltage change frequency, and the Bth preset parameter set may include the Bth voltage change amplitude and the Bth voltage change frequency.

[0116] It should be noted that in the embodiment of the present application, when the driving method of the power supply circuit only repeats the boost and buck changes within the A preset time length and the B preset time length in the second repetition period T2 of the second time interval T2', the driving method of the power supply circuit may also only repeat the boost and buck changes within the first preset time length t1 or the second preset time length t2 in the first repetition period T1 of the first time interval T1', and the specific details are not limited here.

[0117] In addition, the Ath preset time length and the Bth preset time length may be the same or different, and the specific details are not limited here. In addition, the second repetition period T2 may include multiple Ath preset time lengths tA and multiple second preset time lengths tB.

[0118] In this embodiment, since the driving method of the power supply circuit not only includes boosting and reducing the voltage within different preset time lengths of the first repetition cycle T1 in the first preset time interval T1', but also includes boosting and reducing the voltage within different preset time lengths of the second repetition cycle T2 in the second preset time interval T2', it is possible to provide target voltages and target currents with more amplitudes of output to the heating module, thereby further flexibly adjusting the temperature increase of the suppressible heating component, so that the heating component can further adjust its own temperature after heating according to environmental conditions, thereby further improving the performance of the heating component and extending the service life of the heating component. Moreover, in the field of electronic cigarettes, richer aerosols and different flavors of low-temperature baked tobacco can be obtained to meet the taste needs of smokers with different preferences.

[0119] Furthermore, the driving method of the power supply circuit in the embodiment of the present application may also include the following working process:

[0120] See Figure 9 , Figure 9 This is a timing diagram of a driving method of another power supply circuit in an embodiment of the present application.

[0121] The second repetition period T2 may further include the Cth preset duration tC, or may include the Cth preset duration tC to the Mth preset duration tM, where M≥3, and M represents an ordinal number.

[0122] When the second repetition period T2 also includes the Cth preset duration tC, the boost circuit modulates the DC power supply voltage within the Cth preset duration tC of the second repetition period T2 in the second preset time interval T2' according to the Cth preset parameter set sent by the microprocessor to obtain the Cth target voltage and the Cth target current.

[0123] Alternatively, when the second repetition period also includes the Cth preset time length tC to the Mth preset time length tM, the boost circuit and the buck circuit can alternately modulate the DC power supply voltage within the Cth preset time length tC to the Mth preset time length tM of the second repetition period T2 in the second preset time interval T2', and obtain the Cth target voltage, the Cth target current to the Mth target voltage, the Mth target current according to the Cth preset parameter set to the Mth preset parameter set sent by the microprocessor.

[0124] It should be noted that the Cth target voltage to the Mth target voltage are all higher than the DC power supply voltage, but the voltage values ​​obtained from the Cth target voltage to the Mth target voltage are different according to the different working modes of the boost circuit and the buck circuit, and the second repetition period T2 may include at least one Cth preset time length tC, or at least one Cth preset time length tC to at least one Mth preset time length tM.

[0125] The heating module can also be used to perform heating according to the Cth target voltage, the Cth target current, or from the Cth target voltage, the Cth target current to the Mth target voltage, the Mth target current.

[0126] It should be noted that the Cth preset parameter set may include a Cth voltage change amplitude and a Cth voltage change frequency, and the Mth preset parameter set may include an Mth voltage change amplitude and an Mth voltage change frequency.

[0127] It should be noted that in the embodiment of the present application, when the driving method of the power supply circuit repeats the voltage step-up and voltage change from the Ath preset duration to the Cth preset duration in the second repetition period T2 of the second time interval T2', the driving method of the power supply circuit may also repeat the voltage step-up and voltage change from the first preset duration t1 to the third preset duration t3 in the first repetition period T1 of the first time interval T1', and the specific details are not limited here. By way of example, other implementations may also be included.

[0128] In the above embodiment, the boost circuit and the buck circuit may operate alternately in at least one first preset time interval T1 ′ and at least one second preset time interval T2 ′ according to the order of the preset time intervals within the preset alternating time length.

[0129] In the above Figures 1 to 4 In the embodiment, the boost circuit and the buck circuit may also operate alternately within at least one first preset duration t1 and at least one second preset duration t2 according to the order of the preset durations within the preset alternating sub-durations.

[0130] Furthermore, the boost circuit and the buck circuit can operate alternately within at least one first preset duration t1, at least one second preset duration t2, and at least one third preset duration t3 according to the order of preset durations within the preset alternating sub-durations.

[0131] Alternatively, the boost circuit and the buck circuit may operate alternately within at least one first preset duration t1, at least one second preset duration t2, at least one third preset duration t3 to at least one Nth preset duration tN according to the order of preset durations within the preset alternating sub-durations.

[0132] In the above Figure 8 and Figure 9 In the embodiment, the boost circuit and the buck circuit can operate alternately within at least one Ath preset time length tA and at least one Bth preset time length tB according to the order of the preset time lengths within the preset alternating sub-time lengths.

[0133] Furthermore, the boost circuit and the buck circuit can operate alternately within at least one Ath preset time length tA, at least one Bth preset time length tB, and at least one Cth preset time length tC according to the order of the preset time lengths within the preset alternating sub-time lengths.

[0134] Alternatively, the boost circuit and the buck circuit may operate alternately within at least one Ath preset time length tA, at least one Bth preset time length tB, at least one Cth preset time length tC to at least one Mth preset time length tM according to the order of the preset time lengths within the preset alternating sub-time lengths.

[0135] Further, see Figures 10 to 13 , Figures 10 to 13 The target voltage timing diagrams of the driving method of another power supply circuit in the embodiment of the present application are respectively shown. In the embodiment of the present application, the waveform of the target voltage output to the heating module is not limited to the waveform in the aforementioned embodiment. Figure 2 、 Figure 4 、 Figure 6 、 Figure 8 and Figure 9 The output waveform can also be generated by switching the boost circuit and the buck circuit through the microprocessor. Figures 10 to 13 The waveform of the target voltage of the output is not limited here.

[0136] An embodiment of the present application further provides an electronic heating device, the electronic heating device comprising at least one power supply circuit, the power supply circuit comprising:

[0137] microprocessor, voltage control module and heating module;

[0138] The driving method includes the aforementioned Figures 1 to 9 All the voltage increasing methods and voltage decreasing methods in the embodiments will not be described in detail here.

[0139] In the embodiment of the present application, since the power supply circuit can control the DC power supply voltage to obtain target output voltages and target currents of different sizes within different preset time periods, and heat the heating component including the heating module, the temperature rise of the heating component can be suppressed without always maintaining the high temperature generated by the output target voltage being continuously at a higher voltage, thereby enabling the heating component to be heated evenly, improving the performance of the heating component, and reducing local carbon deposition on the heating component, which not only extends the service life of the heating component, but also, in the field of electronic cigarettes, can improve the restoration degree of tobacco oil and tobacco paste, and improve the taste of low-temperature baked non-burning tobacco and aerosol after atomization.

[0140] Although the present application has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art based on reading and understanding this specification and the accompanying drawings. The present application includes all such modifications and variations and is limited only by the scope of the appended claims. In particular, with respect to the various functions performed by the above-mentioned components, the terms used to describe such components are intended to correspond to any component (unless otherwise indicated) that performs the specified function of the component (e.g., it is functionally equivalent), even if it is not structurally equivalent to the disclosed structure that performs the function in the exemplary implementation of this specification shown herein.

[0141] That is, the above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural or equivalent process transformations made using the contents of the description and drawings of this application, such as the mutual combination of technical features between the various embodiments, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

[0142] In the above description, various details are listed for the purpose of explanation. It should be understood that those skilled in the art will recognize that the present application can be implemented without using these specific details. In other embodiments, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest range of principles and features disclosed in the present application.

Claims

1. A driving method for a power supply circuit, characterized in that: include: Providing a power supply circuit, the power supply circuit including a microprocessor, a voltage control module and a heating module; The microprocessor is used to control the voltage control module; The voltage control module is configured to control the DC power supply voltage to obtain a first target voltage and a first target current according to a first preset parameter set sent by the microprocessor within a first preset duration of a first repetition cycle in a first preset time interval, and to obtain a second target voltage and a second target current according to a second preset parameter set sent by the microprocessor within a second preset duration of the first repetition cycle, wherein the first repetition cycle includes at least one first preset duration and at least one second preset duration, and the voltage control module includes a power conversion circuit, which modulates the DC power supply voltage according to a modulation signal sent by the microprocessor and outputs a boost voltage, a buck voltage, or a pass-through voltage corresponding to the modulation signal, wherein the power conversion circuit includes a boost circuit and a buck circuit; The boost circuit modulates the DC power supply voltage within the first preset duration of the first repetition cycle in the first preset time interval according to the first preset parameter set sent by the microprocessor to obtain the first target voltage and the first target current, wherein the first target voltage is higher than the DC power supply voltage; The step-down circuit modulates the DC power supply voltage to obtain the second target voltage and the second target current according to the second preset parameter set sent by the microprocessor within the second preset duration of the first repetition cycle, wherein the second target voltage is lower than the first target voltage; The heating module is configured to perform heating according to the first target voltage, the first target current, the second target voltage, and the second target current.

2. The driving method according to claim 1, wherein: The first preset parameter set includes a first voltage variation amplitude and a first voltage variation frequency, and the second preset parameter set includes a second voltage variation amplitude and a second voltage variation frequency.

3. The driving method according to claim 2, wherein: The first repetition period further includes a third preset duration, or the third preset duration to the Nth preset duration, wherein N>3, and N represents an ordinal number; The boost circuit modulates the DC power supply voltage within the third preset duration of the first repetition cycle in the first preset time interval according to a third preset parameter set sent by the microprocessor to obtain a third target voltage and a third target current; or, The boost circuit and the buck circuit alternately modulate the DC power supply voltage within the first preset time interval from the third preset duration to the Nth preset duration of the first repetition cycle according to the third preset parameter set to the Nth preset parameter set sent by the microprocessor to obtain a third target voltage, a third target current to an Nth target voltage, and an Nth target current, wherein the third target voltage to the Nth target voltage are all higher than the DC power supply voltage, but the voltage values ​​obtained from the third target voltage to the Nth target voltage are different according to different operating modes of the boost circuit and the buck circuit, and the first repetition cycle includes at least one of the third preset duration, or at least one of the third preset duration to at least one of the Nth preset duration; The heating module is further configured to perform heating according to the third target voltage, the third target current, or according to a range from the third target voltage, the third target current to the Nth target voltage, and the Nth target current.

4. The driving method according to claim 3, wherein: The third preset parameter set includes a third voltage variation amplitude and a third voltage variation frequency, and the Nth preset parameter set includes an Nth voltage variation amplitude and an Nth voltage variation frequency.

5. The driving method according to any one of claims 2 to 4, characterized in that: The boost circuit modulates the DC power supply voltage within an Ath preset duration of a second repetition cycle in a second preset time interval according to an Ath preset parameter set sent by the microprocessor to obtain an Ath target voltage and an Ath target current; The step-down circuit modulates the DC power supply voltage according to a Bth preset parameter set sent by the microprocessor within a Bth preset duration of the second repetition cycle to obtain a Bth target voltage and a Bth target current, wherein the Bth target voltage is lower than the Ath target voltage, and the second repetition cycle includes at least one of the Ath preset duration and at least one of the Bth preset duration; The heating module is further configured to perform heating according to the Ath target voltage, the Ath target current, the Bth target voltage, and the Bth target current.

6. The driving method according to claim 5, wherein: The Ath preset parameter set includes an Ath voltage change amplitude and an Ath voltage change frequency, and the Bth preset parameter set includes a Bth voltage change amplitude and a Bth voltage change frequency.

7. The driving method according to claim 6, wherein: The second repetition period also includes the Cth preset duration, or the Cth preset duration to the Mth preset duration, where M represents an ordinal number; The boost circuit modulates the DC power supply voltage within the Cth preset duration of the second repetition cycle in the second preset time interval according to a Cth preset parameter set sent by the microprocessor to obtain a Cth target voltage and a Cth target current; or, The boost circuit and the buck circuit alternately modulate the DC power supply voltage within the Cth preset duration to the Mth preset duration of the second repetition cycle in the second preset time interval, and obtain a Cth target voltage, a Cth target current to an Mth target voltage, and an Mth target current according to the Cth preset parameter set to the Mth preset parameter set sent by the microprocessor, wherein the Cth target voltage to the Mth target voltage are all higher than the DC power supply voltage, but the voltage values ​​obtained from the Cth target voltage to the Mth target voltage are different according to different operating modes of the boost circuit and the buck circuit, and the second repetition cycle includes at least one Cth preset duration, or at least one Cth preset duration to at least one Mth preset duration; The heating module is further configured to perform heating according to the Cth target voltage and the Cth target current, or according to a range from the Cth target voltage and the Cth target current to the Mth target voltage and the Mth target current.

8. The driving method according to claim 7, wherein: The Cth preset parameter set includes a Cth voltage change amplitude and a Cth voltage change frequency, and the Mth preset parameter set includes an Mth voltage change amplitude and an Mth voltage change frequency.

9. The driving method according to claim 8, wherein: The boost circuit and the buck circuit operate alternately in at least one of the first preset time intervals and at least one of the second preset time intervals according to the order of the preset time intervals within the preset alternating time length; The system operates alternately within at least one of the first preset time lengths and at least one of the second preset time lengths according to the sequence of the preset time lengths within the first repetition period.

10. The driving method according to claim 8, wherein: The boost circuit and the buck circuit operate alternately within at least one first preset time length, at least one second preset time length, and at least one third preset time length according to the order of the preset time lengths within the first repetition period; or, According to the order of the preset time lengths in the first repetition period, the operation is alternated within at least one of the first preset time lengths, at least one of the second preset time lengths, at least one of the third preset time lengths to at least one of the Nth preset time lengths.

11. The driving method according to claim 10, wherein: The boost circuit and the buck circuit operate alternately within at least one of the Ath preset time lengths and at least one of the Bth preset time lengths according to the sequence of the preset time lengths within the second repetition period.

12. The driving method according to claim 11, wherein: The boost circuit and the buck circuit operate alternately within at least one of the Ath preset time durations, at least one of the Bth preset time durations, and at least one of the Cth preset time durations according to the order of the preset time durations within the second repetition period; or, According to the order of the preset durations in the second repetition period, the system works alternately within at least one of the Ath preset durations, at least one of the Bth preset durations, at least one of the Cth preset durations to at least one of the Mth preset durations.

13. An electronic heating device, characterized in that: The electronic heating device executes the driving method of the power supply circuit according to any one of claims 1 to 12.

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