Heating control circuit and electronic atomization equipment

Abstract

The utility model provides a heating control circuit and electronic atomization equipment, and belongs to the technical field of electronic atomization, the heating control circuit comprises a voltage conversion sub-circuit and a control sub-circuit, and the voltage conversion sub-circuit is arranged between the power supply end of the heating control circuit and the control sub-circuit; a voltage conversion sub-circuit converts a power supply signal provided by a power supply end into a target signal with a constant voltage value, so that a control sub-circuit can output a square signal with a constant equivalent voltage value to a heating element based on the target signal under the condition that a control signal end of a heating control circuit provides a control signal; therefore, the working power of the heating element is basically kept consistent in time sequence based on the square wave signal, and the working power of the heating element cannot be reduced along with the reduction of the actual voltage of the battery.

Description

Technical Field

[0001] This application relates to the field of electronic atomization technology, specifically to a heating control circuit and an electronic atomization device. Background Technology

[0002] Typically, electronic atomizing devices use their heating wires to convert electrical energy supplied by their power components into heat energy. The heat energy then heats the aerosol generating matrix stored within the electronic atomizing device, allowing the aerosol generating matrix to generate aerosols without combustion.

[0003] In related technologies, the voltage of the battery in the power supply component gradually decreases as the electronic atomization device is used. When the actual voltage of the battery drops below the effective voltage required for the heating element to operate normally, the working power of the heating element decreases as the actual voltage of the battery decreases. As a result, the amount of aerosol generated by the heating element per unit time varies with the actual voltage of the battery, causing the inhalation taste of the electronic atomization device to be inconsistent as the battery voltage decreases, thus affecting the user experience. Utility Model Content

[0004] This application provides a heating control circuit and an electronic atomization device, aiming to solve the technical problem that the working power of the heating element of the electronic atomization device decreases as the actual voltage of the battery decreases.

[0005] Firstly, the heating control circuit provided in this application includes:

[0006] A voltage conversion sub-circuit is electrically connected to the power supply terminal of the heating control circuit and the ground terminal of the heating control circuit, respectively. The voltage conversion sub-circuit is configured to convert the power supply signal provided by the power supply terminal into a target signal, wherein the voltage value of the target signal is constant.

[0007] A control subcircuit is electrically connected to the control signal terminals of the voltage conversion subcircuit and the heating control circuit, respectively. The control subcircuit is configured to output a square wave signal with a constant voltage value based on the target signal according to the control signal provided by the control signal terminal, so that the heating element is heated based on the square wave signal. The equivalent voltage value of the square wave signal is constant and is less than the voltage value of the target signal.

[0008] Furthermore, the voltage conversion sub-circuit includes:

[0009] A voltage adjustment chip, wherein the input pin of the voltage adjustment chip is electrically connected to the power supply terminal, the output pin of the voltage adjustment chip is electrically connected to the control sub-circuit, the enable pin of the voltage adjustment chip receives an enable signal, and the voltage adjustment chip converts the power supply signal into the target signal according to the enable signal;

[0010] A first inductor, the first end of which is electrically connected to the input pin, and the second end of which is electrically connected to the switch control pin of the voltage adjustment chip;

[0011] The first capacitor has its first plate electrically connected to the second terminal of the first inductor, and its second plate electrically connected to the start pin of the voltage adjustment chip.

[0012] Furthermore, the voltage conversion sub-circuit also includes at least one second capacitor, wherein the first plate of each second capacitor is electrically connected to the input pin, and the second plate of each second capacitor is electrically connected to the ground terminal.

[0013] Furthermore, the voltage conversion sub-circuit also includes at least one third capacitor, wherein the first plate of each third capacitor is electrically connected to the output pin, and the second plate of each third capacitor is electrically connected to the ground terminal.

[0014] Furthermore, the voltage conversion sub-circuit also includes a first resistor, a second resistor, and a fourth capacitor; wherein,

[0015] The first end of the first resistor is electrically connected to the output pin, and the second end of the first resistor is electrically connected to the feedback pin of the voltage adjustment chip and the first end of the second resistor, respectively.

[0016] The second end of the second resistor is electrically connected to the grounding terminal;

[0017] The first plate of the fourth capacitor is electrically connected to the feedback pin, and the second plate of the fourth capacitor is electrically connected to the ground terminal.

[0018] Furthermore, the voltage conversion sub-circuit also includes:

[0019] A third resistor and a fifth capacitor, wherein the first end of the third resistor is electrically connected to the compensation pin of the voltage adjustment chip, the second end of the third resistor is electrically connected to the first plate of the fifth capacitor, and the second plate of the fifth capacitor is electrically connected to the ground terminal;

[0020] And / or,

[0021] The fourth resistor has its first end electrically connected to the limiting pin of the voltage adjustment chip, and its second end electrically connected to the ground terminal.

[0022] Furthermore, the control sub-circuit includes a sixth resistor, a seventh resistor, and a switching transistor; wherein,

[0023] The first end of the sixth resistor is electrically connected to the control signal terminal, and the second end of the sixth resistor is electrically connected to the control terminal of the switching transistor.

[0024] The input terminal of the switching transistor is electrically connected to the voltage conversion sub-circuit, and the output terminal of the switching transistor is electrically connected to the heating element.

[0025] The first end of the seventh resistor is electrically connected to the input terminal of the switching transistor, and the second end of the seventh resistor is electrically connected to the control terminal of the switching transistor.

[0026] Furthermore, the heating control circuit also includes:

[0027] A sampling sub-circuit is electrically connected to the control sub-circuit, the voltage sampling terminal of the heating control circuit, and the ground terminal, respectively. The sampling sub-circuit is configured to output a sampling signal to the voltage sampling terminal based on the square wave signal.

[0028] Furthermore, the sampling sub-circuit includes a fifth resistor and a sixth capacitor;

[0029] The first end of the fifth resistor is electrically connected to the control sub-circuit, and the second end of the fifth resistor is electrically connected to the voltage sampling terminal;

[0030] The first plate of the sixth capacitor is electrically connected to the voltage sampling terminal, and the second plate of the sixth capacitor is electrically connected to the ground terminal.

[0031] Secondly, the electronic atomization device provided in this application includes: a heating element for atomizing the aerosol generation matrix; and

[0032] In any of the aforementioned heating control circuits, the heating control circuit is electrically connected to the heating element.

[0033] In the heating control circuit and electronic atomization device provided in this application, by setting the voltage conversion sub-circuit between the power supply terminal and the control sub-circuit of the heating control circuit, the voltage conversion sub-circuit converts the power supply signal provided by the power supply terminal into a target signal with a constant voltage value. Thus, when the control signal terminal of the heating control circuit provides a control signal, the control sub-circuit can output a square wave signal to the heating element based on the target signal. Since the voltage value of the target signal is constant, the equivalent voltage value of the square wave signal output to the heating element based on the target signal is constant and less than the voltage value of the target signal. The square wave signal with a constant equivalent voltage value can keep the working power of the heating element basically consistent in time, so that the working power of the heating element will not decrease as the actual voltage of the battery decreases. Attached Figure Description

[0034] Figure 1 A schematic diagram of a heating control circuit provided in one embodiment of this application;

[0035] Figure 2 A schematic diagram of a heating control circuit provided for another embodiment of this application.

[0036] Figure label:

[0037] Heating control circuit 100, voltage conversion sub-circuit 10, control sub-circuit 20, sampling sub-circuit 30, power supply terminal B+, ground terminal GND, control signal terminal VO1, voltage sampling terminal SAMP, first inductor L1, first capacitor C1, second capacitor C2, third capacitor C3, voltage adjustment chip U1, input pin VIN, switch control pin SW, start pin BST, output pin VBUS, limit pin ILIMT, compensation pin COMP, feedback pin FB, start pin BST, enable pin EN, power input pin VCC, analog ground pin AGND, power ground pin PGND, second capacitor C2, third capacitor C3, first resistor R1, second resistor R2, third resistor R3, fourth capacitor C4, fifth capacitor C5, fourth resistor R4, sixth resistor R6, seventh resistor R7, switching transistor Q1, sampling sub-circuit 30, fifth resistor R5, sixth capacitor C6. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. The described embodiments are only used to explain the ideas of the present invention and should not be regarded as limiting the scope of protection of this application.

[0039] It should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0040] This application provides a heating control circuit in a first aspect. This heating control circuit is applied in an electronic atomization device to control the heating element of the electronic atomization device to heat the aerosol generation matrix stored in the electronic atomization device.

[0041] like Figure 1 As shown, in one embodiment provided in this application, the heating control circuit 100 includes a voltage conversion sub-circuit 10 and a control sub-circuit 20.

[0042] The voltage conversion sub-circuit 10 is electrically connected to the power supply terminal B+ of the heating control circuit 100 and the ground terminal GND of the heating control circuit 100, respectively. The voltage conversion sub-circuit 10 is configured to convert the power supply signal provided by the power supply terminal B+ into a target signal with a constant voltage value.

[0043] By electrically connecting the voltage conversion sub-circuit 10 between the power supply terminal B+ and the ground terminal GND, the heating control circuit 100 forms a loop within itself.

[0044] The power supply terminal B+ of the heating control circuit 100 can be electrically connected to the control circuit board of the electronic atomization device, and the control circuit board is electrically connected to the battery of the electronic atomization device, so that the control circuit board transmits the power supply signal supplied by the battery to the power supply terminal B+ of the heating control circuit 100 accordingly.

[0045] As the electronic atomization device is used, the electrical energy stored in the battery gradually decreases, and correspondingly, the voltage value of the power supply signal output from the battery to the power supply terminal B+ decreases. In this embodiment, based on the configuration of the voltage conversion sub-circuit 10, the voltage value of the target signal output to the control sub-circuit 20 does not change due to the decrease in the voltage value of the power supply signal, thereby keeping the voltage value of the target signal constant.

[0046] The control sub-circuit 20 is electrically connected to the voltage conversion sub-circuit 10 and the control signal terminal VO1 of the heating control circuit 100. The control sub-circuit 20 is configured to output a square wave signal with a constant equivalent voltage value based on the target signal according to the control signal provided by the control signal terminal VO1, so that the heating element is heated based on the square wave signal.

[0047] The control signal terminal VO1 of the heating control circuit 100 can be electrically connected to the control circuit board of the electronic atomization device. The control circuit board outputs the control signal to the control signal terminal VO1, so that the control sub-circuit 20 supplies the square wave signal to the heating element according to the actual situation of the electronic atomization device, thereby controlling the relevant working parameters of the heating element, such as the start time of heating, the stop time of heating, and the heating duration.

[0048] Under the control of the control signal, the control sub-circuit 20 outputs a square wave signal with a constant equivalent voltage value to the heating element based on the target signal. As a result, the working power of the heating element remains basically or even completely consistent in time based on the square wave signal with a constant equivalent voltage value. Therefore, the working power of the heating element will not decrease as the supply voltage decreases, that is, the working power of the heating element will not decrease as the actual voltage of the battery decreases. Consequently, the inhalation taste of the aerosol generated by the electronic atomization device remains consistent during the use of the electronic atomization device, which is beneficial to improving the user's inhalation experience.

[0049] It should be noted that, in this embodiment, a square wave signal refers to a rectangular pulse sequence that has a periodic rectangular waveform and whose voltage jumps instantaneously between high and low levels.

[0050] Specifically, in this embodiment, the periodic switching of the control sub-circuit 20 is controlled by the control signal provided by the control signal terminal VO1. The control sub-circuit 20 performs chopping processing on the target signal, which is a DC voltage, so that the signal output by the control sub-circuit 20 to the heating element is a square wave signal. Since the voltage value of the target signal is constant, the equivalent voltage value of the square wave signal obtained by chopping the target signal is constant, and the voltage value of the target signal is greater than the equivalent voltage value of the square wave signal.

[0051] The formula for calculating the equivalent voltage value of a square wave signal is as follows:

[0052] U 等效 =(t on / T)×U 目标 (1);

[0053] In the calculation relation (1), U 目标 Where t is the voltage value of the target signal, T is the duration of the preset period, and t is the voltage value of the target signal. on U is the conduction duration of the switching transistor Q1 within a preset period. 等效 This is the equivalent voltage value of the square wave signal.

[0054] Based on the calculation relationship (1), it can be seen that if the duration of the preset period and the conduction time of the switching transistor Q1 within the preset period are constant, the equivalent voltage value of the square wave signal is related to the voltage value of the target signal. In this case, if the voltage value of the target signal is constant, the equivalent voltage value of the square wave signal is constant, and the working power of the heating element is constant based on the square wave signal with a constant equivalent voltage value. Therefore, the working power of the heating element will not decrease as the actual voltage of the battery decreases. The amount of aerosol generated by the heating element in the atomization of the aerosol matrix is ​​quite similar or even consistent, and the inhalation taste of the electronic atomization device is quite similar or even consistent.

[0055] Specifically, in one embodiment provided in this application, please continue to refer to... Figure 1 The voltage conversion sub-circuit 10 includes a voltage adjustment chip U1, a first inductor L1, and a first capacitor C1.

[0056] In this circuit, the input pin VIN of the voltage regulator chip U1 is electrically connected to the power supply terminal B+, and the output pin VBUS of the voltage regulator chip U1 is electrically connected to the control sub-circuit 20. Thus, the input pin VIN receives the power supply signal from the power supply terminal B+, and the output pin VBUS outputs the target signal obtained by the voltage regulator chip U1 converting the power supply signal to the control sub-circuit 20.

[0057] Furthermore, the enable pin EN of the voltage regulator chip U1 can also be electrically connected to the control circuit board. The control circuit board outputs an enable signal to the enable pin EN, and the voltage regulator chip U1 is awakened according to the received enable signal. In the awakened state, the voltage regulator chip U1 converts the power supply signal into the target signal.

[0058] The voltage adjustment chip U1, which is in an unawakened state, does not work. In other words, if the voltage adjustment chip U1 is not awakened, even if there is a power supply signal at the power supply terminal B+, the circuit between the power supply terminal B+ and the control sub-circuit 20 remains open.

[0059] It is worth mentioning that the specific voltage value of the target signal depends on the internal circuit of the voltage adjustment chip U1, so the model of the voltage adjustment chip U1 can be replaced according to the specific voltage value requirement of the target signal.

[0060] In the embodiments of this application, the voltage adjustment chip U1 can be a DC-DC boost converter chip, which may include, but is not limited to, TPS61178, PL30502, MP9428A, MP3432, etc.

[0061] Specifically, the first end of the first inductor L1 is electrically connected to the input pin VIN, and the second end of the first inductor L1 is electrically connected to the switch control pin SW of the voltage regulation chip U1. The first plate of the first capacitor C1 is electrically connected to the second end of the first inductor L1, and the second plate of the first capacitor C1 is electrically connected to the start pin BST of the voltage regulation chip U1.

[0062] The power supply signal at the power supply terminal B+ is filtered by the first inductor L1, so that the filtered power supply signal is received at the switch control pin SW. The switch control pin SW is electrically connected to the power switching element inside the voltage regulation chip U1. The switch control pin SW is used to control the conduction and cutoff of the voltage regulation chip U1 to realize power conversion. In addition, in this embodiment, the voltage control pin is also electrically connected to the first inductor L1 through the first capacitor C1. In this way, the voltage regulation chip U1 controls the on / off of its internal switching element based on the voltage at the switch control pin SW, changes the current in the first inductor L1, thereby boosting or bucking the electrical signal (i.e., the power supply signal) at the input pin VIN to the target signal of the preset voltage value, and then the target signal is output to the outside of the voltage regulation chip U1 by the output pin VBUS.

[0063] Since the first plate of the first capacitor C1 is electrically connected to the second end of the first inductor L1, and the second end of the first inductor L1 is also electrically connected to the switch control pin SW, the first capacitor C1 is actually electrically connected between the switch control pin SW and the start pin BST, so the first capacitor C1 is charged by the electrical signal at the switch control pin SW.

[0064] Furthermore, in one embodiment provided in this application, the voltage conversion sub-circuit 10 further includes at least one second capacitor C2. The first plate of each second capacitor C2 is electrically connected to the input pin VIN, and the second plate of each second capacitor C2 is electrically connected to the ground terminal GND.

[0065] By placing at least one second capacitor C2 between the power supply terminal B+ and the input pin VIN, the filtering function of the second capacitor C2 is used to smooth the ripple and noise in the power supply terminal B+, and output a more stable power supply signal to the input pin VIN.

[0066] For example, please continue reading Figure 1The voltage conversion sub-circuit 10 includes three second capacitors C2. It is worth mentioning that when the voltage conversion sub-circuit 10 has two or more second capacitors C2 connected in parallel, a wider frequency range filtering effect can be achieved, further reducing the noise of the power supply at the B+ terminal. The capacitance of the multiple second capacitors C2 connected in parallel can be the same or different, and can be adjusted according to the actual situation.

[0067] Furthermore, in one embodiment provided in this application, the voltage conversion sub-circuit 10 further includes at least one third capacitor C3. The first plate of each third capacitor C3 is electrically connected to the output pin VBUS, and the second plate of each third capacitor C3 is electrically connected to the ground terminal GND.

[0068] By placing at least one third capacitor C3 between the output pin VBUS and the ground terminal GND, the filtering function of the third capacitor C3 is used to smooth the voltage ripple and noise at the output pin VBUS, thereby making the target signal output to the control sub-circuit 20 purer and more stable.

[0069] For example, please continue reading Figure 1 The voltage conversion sub-circuit 10 includes three third capacitors C3. It is worth mentioning that when the voltage conversion sub-circuit 10 has two or more third capacitors C3 connected in parallel, a wider frequency range filtering effect can be achieved, further reducing noise at the output pin VBUS. The capacitance of the multiple third capacitors C3 connected in parallel can be the same or different, and can be adjusted according to the actual situation.

[0070] Furthermore, in one embodiment provided in this application, the voltage conversion sub-circuit 10 further includes a first resistor R1, a second resistor R2, and a fourth capacitor C4.

[0071] The first end of the first resistor R1 is electrically connected to the output pin VBUS, the second end of the first resistor R1 is electrically connected to the feedback pin FB of the voltage adjustment chip U1 and the first end of the second resistor R2, the second end of the second resistor R2 is electrically connected to the ground terminal GND, the first plate of the fourth capacitor C4 is electrically connected to the feedback pin FB, and the second plate of the fourth capacitor C4 is electrically connected to the ground terminal GND.

[0072] In this embodiment, the first resistor R1 and the second resistor R2 are connected in series between the output pin VBUS and the ground terminal GND, thereby forming a voltage divider circuit between the output pin VBUS and the ground terminal GND. The voltage division state of the voltage divider circuit can be adjusted by adjusting the resistance values ​​of the first resistor R1 and the second resistor R2. The fourth capacitor C4 is connected in series between the feedback pin FB and the ground terminal GND to filter the electrical signal at the feedback pin FB.

[0073] The feedback pin FB is used to adjust the voltage stability of the target signal at the output pin VBUS. The feedback pin FB is electrically connected to the second terminal of the first resistor R1 and the first terminal of the second resistor R2 to monitor the voltage value of the target signal in real time, so as to make corresponding adjustments based on the monitoring results and ensure that the voltage value of the target signal remains at a preset constant value.

[0074] Furthermore, in one embodiment of this application, please continue to refer to... Figure 1 The voltage conversion sub-circuit 10 also includes a third resistor R3 and a fifth capacitor C5.

[0075] The first end of the third resistor R3 is electrically connected to the compensation pin COMP of the voltage adjustment chip U1, the second end of the third resistor R3 is electrically connected to the first plate of the fifth capacitor C5, and the second plate of the fifth capacitor C5 is electrically connected to the ground terminal GND.

[0076] In this embodiment, the third resistor R3 and the fifth capacitor C5, connected in series between the compensation pin COMP and the ground terminal GND, constitute an external compensation network. This external compensation network adjusts the frequency response of the feedback loop in the voltage conversion sub-circuit 10 to adjust the feedback loop (sampling network, error amplification network, external compensation network, and logic control network) of the voltage adjustment chip U1. Typically, the compensation pin COMP is electrically connected to the output of the internal error amplifier of the voltage adjustment chip U1, thus the external compensation network and the error amplifier together constitute a compensation circuit to adjust the characteristics of the feedback loop.

[0077] Furthermore, in one embodiment of this application, please continue to refer to... Figure 1 The voltage conversion sub-circuit 10 also includes a fourth resistor R4.

[0078] The first end of the fourth resistor R4 is electrically connected to the limiting pin ILIMT of the voltage adjustment chip U1, and the second end of the fourth resistor R4 is electrically connected to the ground terminal GND.

[0079] The limiting pin ILIMT is used to set the maximum output current that the output pin VBUS can output. The specific value of the maximum output current is related to the specific resistance value of the fourth resistor R4.

[0080] In addition, please continue to refer to Figure 1 The voltage regulator chip U1 also includes a power input pin VCC, which supplies external power to the voltage regulator chip U1, providing the electrical energy required for the voltage regulator chip U1 to operate.

[0081] In addition, please continue to refer to Figure 1 The voltage regulation chip U1 also includes an analog ground pin AGND, which serves as the reference ground for the analog signal processing circuit inside the chip. It provides a stable ground potential for the analog circuit inside the voltage regulation chip U1, ensuring accurate processing and conversion of analog signals.

[0082] In addition, please continue to refer to Figure 1 The voltage regulator chip U1 also includes a power ground pin PGND, which provides a loop for the switching current of the power devices inside the voltage regulator chip U1, ensuring stable operation of the power circuit.

[0083] Specifically, in one embodiment, please refer to... Figure 1 The control sub-circuit 20 includes a sixth resistor R6, a seventh resistor R7, and a switching transistor Q1.

[0084] The first end of the sixth resistor R6 is electrically connected to the control signal terminal VO1, and the second end of the sixth resistor R6 is electrically connected to the control terminal of the switching transistor Q1.

[0085] The input terminal of the switching transistor Q1 is electrically connected to the voltage conversion sub-circuit 10, and the output terminal of the switching transistor Q1 is electrically connected to the heating element.

[0086] The first end of the seventh resistor R7 is electrically connected to the input terminal of the switching transistor Q1, and the second end of the seventh resistor R7 is electrically connected to the control terminal of the switching transistor Q1.

[0087] In this embodiment, the control terminal (i.e., the gate of the switching transistor Q1) receives a control signal from the control signal terminal VO1 and switches between the on and off states. It is worth noting that the control signal provided by the control signal terminal VO1 is a pulse width modulation (PWM) signal. The duty cycle of the PWM signal is used to adjust the on-time of the switching transistor Q1 within a preset period, thereby reducing the equivalent voltage value of the square wave signal output from the control switching transistor Q1 to a set value.

[0088] The sixth resistor R6 is connected in series between the control signal terminal VO1 and the gate of the switching transistor Q1 to prevent excessive current from flowing from the control signal terminal VO1 to the gate of the switching transistor Q1. Furthermore, the control terminal of the switching transistor Q1 may have parasitic capacitance and inductance; the sixth resistor R6 dampens these oscillations.

[0089] The seventh resistor R7 is connected in series between the gate and the input terminal (i.e. the source of the switching transistor Q1) as a gate-source pull-down resistor to ensure that the switching transistor Q1 is reliably turned off.

[0090] Furthermore, in one embodiment, as Figure 2 As shown, Figure 2 and Figure 1 The difference lies in that the heating control circuit 100 also includes a sampling sub-circuit 30. The sampling sub-circuit 30 is electrically connected to the control sub-circuit 20, the voltage sampling terminal SAMP of the heating control circuit 100, and the ground terminal GND, respectively. The sampling sub-circuit 30 is configured to output a sampling signal to the voltage sampling terminal SAMP based on a square wave signal.

[0091] In this embodiment, the equivalent voltage value of the square wave signal can be detected based on the specific voltage value of the sampling signal output in real time by the voltage sampling terminal SAMP to determine whether it remains at a preset value.

[0092] Specifically, in one embodiment, please refer to... Figure 2 The sampling sub-circuit 30 includes a fifth resistor R5 and a sixth capacitor C6.

[0093] The first end of the fifth resistor R5 is electrically connected to the control sub-circuit 20, and the second end of the fifth resistor R5 is electrically connected to the voltage sampling terminal SAMP.

[0094] The first plate of the sixth capacitor C6 is electrically connected to the voltage sampling terminal SAMP, and the second plate of the sixth capacitor C6 is electrically connected to the ground terminal GND.

[0095] Generally, the voltage sampling signal output from the second terminal of the fifth resistor R5 may be mixed with various high-frequency noises. By electrically connecting a sixth capacitor C6 between the second terminal of the fifth resistor R5 and the ground terminal GND, the sixth capacitor C6 and the fifth resistor R5 are connected in series between the output terminal of the control sub-circuit 20 and the ground terminal GND. Thus, the fifth resistor R5 and the sixth capacitor C6 form a resistor-capacitor low-pass filter. The cutoff frequency of the resistor-capacitor low-pass filter is determined by the resistance value of the fifth resistor R5 and the capacitance value of the sixth capacitor C6. By setting the cutoff frequency of the low-pass filter to an appropriate value, high-frequency noise above the cutoff frequency can be effectively filtered out, thereby improving the quality of the sampling signal.

[0096] This application provides an electronic atomization device in a second aspect. The electronic atomization device includes a heating element for atomizing an aerosol generating matrix and a heating control circuit as described in any of the foregoing embodiments. The heating control circuit is electrically connected to the heating element, and the heating element heats the aerosol generating matrix to obtain an aerosol.

[0097] The electronic atomizing device provided in this embodiment can be a heated non-combustible device, a disposable atomizing device, or a cartridge-type atomizing device, etc.

[0098] It should be noted that the aerosol mentioned in this application refers to a dispersion of solid or liquid particles in a gas. The term "aerosol" as used herein can generally refer to a substance that has been vaporized, atomized, sprayed, or jetted, or otherwise transformed from a solid or liquid form into an inhalable form containing suspended solid or liquid drug particles.

[0099] As used herein, the aerosol-generating matrix is ​​also referred to as the atomizing matrix. The term "aerosol-generating matrix" means any suitable compound or mixture of compounds that facilitates the formation of aerosols (e.g., stable aerosols that are substantially resistant to thermal degradation at the system's operating temperature) during use. Suitable aerosol forming agents are well known in the art and include, but are not limited to: polyols, such as triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols, such as mono-, di-, or triacetic acid esters of glycerol; and aliphatic esters of mono-, di-, or polycarboxylic acids, such as dimethyl dodecanoate and dimethyl tetradecanoate.

[0100] Of course, this application may have other various embodiments. Without departing from the spirit and essential points of this application, those skilled in the art can make various corresponding changes and modifications based on this application, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A heating control circuit for controlling the heating element of an electronic atomizing device, characterized in that, include: A voltage conversion sub-circuit is electrically connected to the power supply terminal of the heating control circuit and the ground terminal of the heating control circuit, respectively. The voltage conversion sub-circuit is configured to convert the power supply signal provided by the power supply terminal into a target signal, wherein the voltage value of the target signal is constant. A control subcircuit is electrically connected to the control signal terminals of the voltage conversion subcircuit and the heating control circuit, respectively. The control subcircuit is configured to output a square wave signal based on the target signal according to the control signal provided by the control signal terminal, so that the heating element is heated based on the square wave signal. The equivalent voltage value of the square wave signal is constant and is less than the voltage value of the target signal.

2. The heating control circuit according to claim 1, characterized in that, The voltage conversion sub-circuit includes: A voltage adjustment chip, wherein the input pin of the voltage adjustment chip is electrically connected to the power supply terminal, the output pin of the voltage adjustment chip is electrically connected to the control sub-circuit, the enable pin of the voltage adjustment chip receives an enable signal, and the voltage adjustment chip converts the power supply signal into the target signal according to the enable signal; A first inductor, the first end of which is electrically connected to the input pin, and the second end of which is electrically connected to the switch control pin of the voltage adjustment chip; The first capacitor has its first plate electrically connected to the second terminal of the first inductor, and its second plate electrically connected to the start pin of the voltage adjustment chip.

3. The heating control circuit according to claim 2, characterized in that, The voltage conversion sub-circuit further includes at least one second capacitor, wherein the first plate of each second capacitor is electrically connected to the input pin, and the second plate of each second capacitor is electrically connected to the ground terminal.

4. The heating control circuit according to claim 2, characterized in that, The voltage conversion sub-circuit further includes at least one third capacitor, wherein the first plate of each third capacitor is electrically connected to the output pin, and the second plate of each third capacitor is electrically connected to the ground terminal.

5. The heating control circuit according to claim 2, characterized in that, The voltage conversion sub-circuit further includes a first resistor, a second resistor, and a fourth capacitor; wherein... The first end of the first resistor is electrically connected to the output pin, and the second end of the first resistor is electrically connected to the feedback pin of the voltage adjustment chip and the first end of the second resistor, respectively. The second end of the second resistor is electrically connected to the grounding terminal; The first plate of the fourth capacitor is electrically connected to the feedback pin, and the second plate of the fourth capacitor is electrically connected to the ground terminal.

6. The heating control circuit according to claim 2, characterized in that, The voltage conversion sub-circuit also includes: A third resistor and a fifth capacitor, wherein the first end of the third resistor is electrically connected to the compensation pin of the voltage adjustment chip, the second end of the third resistor is electrically connected to the first plate of the fifth capacitor, and the second plate of the fifth capacitor is electrically connected to the ground terminal; And / or, The fourth resistor has its first end electrically connected to the limiting pin of the voltage adjustment chip, and its second end electrically connected to the ground terminal.

7. The heating control circuit according to claim 1, characterized in that, The control sub-circuit includes a sixth resistor, a seventh resistor, and a switching transistor; wherein... The first end of the sixth resistor is electrically connected to the control signal terminal, and the second end of the sixth resistor is electrically connected to the control terminal of the switching transistor. The input terminal of the switching transistor is electrically connected to the voltage conversion sub-circuit, and the output terminal of the switching transistor is electrically connected to the heating element. The first end of the seventh resistor is electrically connected to the input terminal of the switching transistor, and the second end of the seventh resistor is electrically connected to the control terminal of the switching transistor.

8. The heating control circuit according to any one of claims 1 to 7, characterized in that, The heating control circuit also includes: A sampling sub-circuit is electrically connected to the control sub-circuit, the voltage sampling terminal of the heating control circuit, and the ground terminal, respectively. The sampling sub-circuit is configured to output a sampling signal to the voltage sampling terminal based on the square wave signal.

9. The heating control circuit according to claim 8, characterized in that, The sampling sub-circuit includes a fifth resistor and a sixth capacitor; The first end of the fifth resistor is electrically connected to the control sub-circuit, and the second end of the fifth resistor is electrically connected to the voltage sampling terminal; The first plate of the sixth capacitor is electrically connected to the voltage sampling terminal, and the second plate of the sixth capacitor is electrically connected to the ground terminal.

10. An electronic atomizing device, characterized in that, include: Heating elements used to generate a matrix for atomized aerosols; as well as The heating control circuit according to any one of claims 1 to 9, wherein the heating control circuit is electrically connected to the heating element.

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