CN115606873A

CN115606873A - System control circuit, indicating assembly and electronic atomization device

Info

Publication number: CN115606873A
Application number: CN202210772890.2A
Authority: CN
Inventors: 宋利军; 宋朋亮
Original assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Current assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-01-17

Abstract

The present application provides a system control circuit for driving an indicator light of an electronic atomizer, comprising: the power supply end, the power grounding end, the heating control unit and the atomization end are electrically connected with the second end of the first capacitor; the first end of the first switch unit is electrically connected with the power supply end, the second end of the first switch unit is electrically connected with the atomization end, and the control end of the first switch unit is electrically connected with the heating control unit; the first end of the second one-way conduction element is electrically connected with the power supply end of the power supply, and the second end of the second one-way conduction element is electrically connected with the first end of the first capacitor and the indicator light; the first switch unit is turned off, the second one-way conduction element is turned on to charge the first capacitor, and the first switch unit is turned on, and the second one-way conduction element is turned off to raise the potential of the first end of the first capacitor so as to drive the indicator light. The embodiment of the application also provides an indicating assembly of the electronic atomization device and the electronic atomization device.

Description

System control circuit, indicating assembly and electronic atomization device

Technical Field

The application relates to the technical field of electronic atomization, in particular to a system control circuit, an indicating assembly and an electronic atomization device.

Background

Existing electronic atomization devices, such as electronic cigarettes, generally include an indicator light, which generally uses LED lights, which generally include white LED lights, blue LED lights, and the like, and the forward on-voltage range of these LED lights is generally greater than or equal to 2.5V, generally 2.5V to 3.6V, for example, 3V. The existing electronic atomization device replaces a common electric core with a low-voltage electric core, so that the number of suction ports of the electronic device can be increased, and the cost of the electronic atomization device can be reduced. However, the output voltage range of the low-voltage battery cell is generally 1.5V to 3.6V (the nominal voltage is generally 2.8V), and compared with the output voltage range of the ordinary battery cell which is 2.5V to 4.2V (the nominal voltage is generally 3.7V), the output voltage of the low-voltage power supply is relatively low, which results in that the indicator lamp cannot stably emit light.

Disclosure of Invention

The technical problem to be solved by the embodiments of the present application is to provide a system control circuit, an indicating assembly and an electronic atomization device for driving an indicator light of the electronic atomization device. The indicator lamp can be stably driven to emit light and is low in cost.

In order to solve the above technical problem, a first aspect of the embodiments of the present application provides a system control circuit for driving an indicator light of an electronic atomization device, including:

the heating control device comprises a power supply end, a power supply grounding end and a heating control unit, wherein the power supply end and the power supply grounding end are correspondingly electrically connected with a positive pole and a negative pole of a power supply;

the power supply ground terminal is electrically connected with the second end of the heating element, and the atomization end is electrically connected with the second end of the first capacitor;

the first end of the first switch unit is electrically connected with the power supply end, the second end of the first switch unit is electrically connected with the atomization end, and the control end of the first switch unit is electrically connected with the heating control unit;

the first end of the second one-way conduction element is electrically connected with the power supply end of the power supply, and the second end of the second one-way conduction element is electrically connected with the first end of the first capacitor and the indicator light;

the first switch unit is turned off and the second one-way conduction element is turned on to charge the first capacitor, and the first switch unit is turned on and the second one-way conduction element is turned off to raise the potential of the first end of the first capacitor, so that the indicator light is driven.

Optionally, the second unidirectional conducting element includes a second switch unit, a control end of the second switch unit is electrically connected to the heating control unit, the heating control unit controls the first switch unit to be turned off and the second switch unit to be turned on to charge the first capacitor, and the heating control unit controls the first switch unit to be turned on and the second switch unit to be turned off to raise a potential of the first end of the first capacitor, so as to drive the indicator light.

Optionally, the heating control unit includes a second driving unit, and an output end of the second driving unit is used to control whether the second switching unit is turned on.

Optionally, the second switch unit includes a PMOS transistor, the second drive unit includes a phase inverter, a second NMOS transistor, a third NMOS transistor, a second PMOS transistor, and a third PMOS transistor, wherein an input end of the phase inverter is electrically connected to a control end of the first switch unit, an output end of the phase inverter is electrically connected to a control end of the second NMOS transistor, a source of the second NMOS transistor is electrically connected to a power ground terminal, a drain of the second NMOS transistor is electrically connected to a drain of the second PMOS transistor and a control end of the third PMOS transistor, respectively, a control end of the second PMOS transistor is electrically connected to a drain of the third NMOS transistor, a source of the second PMOS transistor is electrically connected to a second end of the second switch unit, a source of the third NMOS transistor is electrically connected to the power ground terminal, a control end of the third NMOS transistor is electrically connected to a control end of the first switch unit, a drain of the third NMOS transistor is also electrically connected to a drain of the third PMOS transistor, a source of the third PMOS transistor is electrically connected to a second end of the first switch unit, and a drain of the third NMOS transistor is also used to control whether the second switch unit is turned on or not; alternatively, the first and second liquid crystal display panels may be,

the heating control unit further comprises a heating logic unit, and the input end of the second driving unit is electrically connected with the heating logic unit; alternatively, the first and second electrodes may be,

the second switch unit comprises an NMOS tube, the second drive unit comprises a second booster circuit, the output end of the second booster circuit is electrically connected with the control end of the second switch unit, and the input end of the second drive unit is electrically connected with the control end of the first switch unit; alternatively, the first and second electrodes may be,

the heating control unit further comprises a heating logic unit, the second switch unit comprises an NMOS (N-channel metal oxide semiconductor) tube, the second drive unit comprises a second booster circuit, the output end of the second booster circuit is electrically connected with the control end of the second switch unit, and the input end of the second drive unit is electrically connected with the heating logic unit; alternatively, the first and second electrodes may be,

when the second switch unit is conducted, the voltage between the source electrode and the drain electrode of the second switch unit is less than 0.1V.

Optionally, the second unidirectional conductive element includes a diode, an anode of the diode is a first end of the second unidirectional conductive element, and a cathode of the diode is a second end of the second unidirectional conductive element.

Optionally, the first switch unit includes a PMOS transistor, a source of the PMOS transistor is electrically connected to a power supply end of a power supply, a drain of the PMOS transistor is electrically connected to the atomization end, and a control end of the PMOS transistor is electrically connected to the heating control unit; alternatively, the first and second liquid crystal display panels may be,

the system control circuit further comprises a suction detection unit and a suction detection end, the suction detection end is used for being electrically connected with the airflow sensor, the suction detection unit is respectively electrically connected with the suction detection end and the heating control unit, when the suction detection unit judges that the electronic atomization device is in a suction state, the suction detection unit outputs a first signal to the heating control unit, when the suction detection unit judges that the electronic atomization device is in a non-suction state, the suction detection unit sends a second signal to the heating control unit, when the heating control unit receives the first signal, the heating control unit outputs a duty ratio signal to the control end of the first switch unit, and when the heating control unit receives the second signal, the heating control unit controls the first switch unit to be normally closed.

Optionally, the system control circuit is located on the same chip or a circuit of the system control circuit except for the first switch unit is located on the same chip, the power supply end is a power supply pin, the power ground end is a power ground pin, and the atomization end is an atomization pin, the system control circuit further includes a first light emitting pin and a second light emitting pin, the first light emitting pin is used for being electrically connected to the first end of the first capacitor, the first end of the indicator light, and the second end of the second unidirectional conducting element, and the second light emitting pin is used for being electrically connected to the second end of the indicator light; alternatively, the first and second liquid crystal display panels may be,

the system control circuit is positioned on the same chip or circuits of the system control circuit except the first switch unit are positioned on the same chip, the power supply end is a power supply pin, the power grounding end is a power grounding pin, the atomizing end is an atomizing pin, the system control circuit further comprises a first light-emitting pin and a second light-emitting pin, the first light-emitting pin is used for being electrically connected with a first end of a first capacitor and a second end of a second one-way conduction element, the second light-emitting pin is used for being electrically connected with a first end of an indicator light, and the power grounding pin is used for being electrically connected with a second end of the indicator light; alternatively, the first and second electrodes may be,

the system control circuit further comprises a lighting control unit, the lighting control unit is used for controlling whether the indicator lamp emits light or not, the system control circuit further comprises a third switch unit or a current source, the third switch unit or the current source is used for being connected with the indicator lamp in series, and a control end of the third switch unit or the current source is electrically connected with the lighting control unit; when the electronic atomization device is in a suction state, the third switch unit and the first switch unit are synchronously switched on or switched off, or when the electronic atomization device is in the suction state, the current source synchronously works when the first switch unit is switched on, and the current source does not work synchronously when the first switch unit is switched off, or when the electronic atomization device is in the suction state, the on time of the first switch unit is longer than the on time of the third switch unit, or when the electronic atomization device is in the suction state, the on time of the first switch unit is longer than the working time of the current source.

In a second aspect, an indicating assembly of an electronic atomizer includes

The system control circuit described above;

the indicator light is electrically connected with the second end of the second unidirectional conducting element;

a first end of the first capacitor is electrically connected with a second end of the second unidirectional conducting element, and a second end of the first capacitor is electrically connected with the atomization end;

and the positive pole and the negative pole of the power supply are correspondingly and electrically connected with the power supply end and the power grounding end of the system control circuit.

Optionally, the power supply is a battery cell, and a power supply voltage range provided by the battery cell includes 1.5V to 3.6V;

the indicator lamp comprises a white LED lamp and/or a blue LED lamp, and the minimum on-voltage of the indicator lamp is greater than or equal to 2.5V.

A third aspect of the embodiments of the present application provides an electronic atomization device, including:

the above system control circuit or the above indicating component;

the first end of the heating element is electrically connected with the atomization end, and the second end of the heating element is electrically connected with the power grounding end;

a containing device, which is empty for containing liquid;

the heating element is in contact with the liquid in the accommodating device, and when the heating control unit controls the first switch unit to be switched on, the heating element generates heat to atomize the liquid.

The system control circuit comprises a first switch unit, a second switch unit and a control unit, wherein the first end of the first switch unit is electrically connected with the power supply end of the power supply, the second end of the first switch unit is electrically connected with the atomization end, and the control end of the first switch unit is electrically connected with the heating control unit; the first end of the second one-way conduction element is electrically connected with the power supply end of the power supply, and the second end of the second one-way conduction element is electrically connected with the first end of the first capacitor and the indicator light; the first switch unit is turned off, the second one-way conduction element is turned on to charge the first capacitor, and the first switch unit is turned on, and the second one-way conduction element is turned off to raise the potential of the first end of the first capacitor so as to drive the indicator light. Therefore, the first end of the first capacitor is higher in voltage after being lifted, and can be used for driving the indicator lamp more stably; moreover, the second end of the first capacitor is electrically connected with the atomization end, and a system control circuit does not need to separately add a terminal connected with the second end of the first capacitor, so that the number of terminals can be reduced, and the cost is reduced. In addition, the first switch unit is shared in the embodiment, and the switch unit for boosting is not required to be additionally arranged, so that the cost is further reduced.

Drawings

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

Fig. 1 is a circuit block diagram of an electronic atomizer according to a first embodiment of the present application;

FIG. 2 is a detailed circuit diagram of a portion of the indicating assembly of the first embodiment of the present application;

FIG. 3 is a block diagram of an electronic atomizer device according to another embodiment of the present application;

FIG. 4 is a partial detailed circuit diagram of the indicating assembly of FIG. 3;

FIG. 5 is a detailed circuit diagram of a portion of an indicating assembly of a second embodiment of the present application;

reference numerals:

110-a power supply; 120-a first indicator light; 130-a heat-generating element; 140-an airflow sensor; 200-a system control circuit; 300-a heating control unit; 310-a first drive unit; 320-a second drive unit; 321-an inverter; 330-heat-generating logic unit; 400-a light control unit;

BAT-power supply terminal/pin; GND-power ground/pin; AT-atomizing terminal/pin; FG 1-first light emitting pin; FG 2-second light emitting pin; SW-airflow detection pin; c1-a first capacitor; k1-a first switching unit; k2-a second one-way conduction element; k3 — a third switching unit; rx-Current limiting resistance; NM 1-first NMOS transistor; NM 2-second NMOS tube; NM 3-third NMOS tube; PM 1-first PMOS tube; PM 2-second PMOS tube; PM 3-third PMOS tube.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprising" and "having," and any variations thereof, as appearing in the specification, claims and drawings of this application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to the listed steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order. The electrical connection includes a direct electrical connection and an indirect electrical connection, and the indirect electrical connection means that other electronic components, pins and the like can exist between two electrically connected components. The terminal XX referred to in this application may or may not be an actual terminal, such as only one terminal of a component or one terminal of a wire. Three cases are mentioned and/or included in the present application, for example, a and/or B, including three cases a, B, a and B.

First embodiment

The embodiment of the application provides an electronic atomization device, for example, the electronic atomization device is an electronic cigarette, and the electronic atomization device can also be used for beauty treatment, medical treatment and the like. Referring to fig. 1, the electronic atomizer includes an indicating component, a heating element 130, and an airflow sensor 140, wherein the indicating component includes a power source 110, a first indicator 120, a system control circuit 200, and a first capacitor C1. The system control circuit 200 is electrically connected to the power source 110, the first indicator light 120, the heating element 130, the airflow sensor 140, and the like. In this embodiment, the power source 110 includes a battery cell, for example, a rechargeable battery cell such as a lithium battery cell, a nickel cadmium battery cell, a nickel hydrogen battery cell, and the like, and the power source 110 is a low voltage power source 110, and provides a power supply voltage in a range of 1.5V-3.6V, for example, in a range of 1.5V-3.6V, 1.6V-3.6V, 1.5V-3.4V, 1.8V-3.5V, 2.1V-3.6V, 2.5V-3.5V, and the like, and a nominal voltage thereof is lower than or equal to 3V, and is generally in a range of 2.5V-2.9V, for example, 2.7V, and 2.8V. The first indicator light 120 is, for example, an LED light, such as a white LED light and/or a blue LED light, and the forward conducting voltage range of these LED lights is generally 2.5V-

3.6V, for example 3V, the LED lamp can be lighted only if the voltage for driving the LED lamp is larger than the forward conducting voltage, and the LED lamp is not lighted when the voltage is lower than the forward conducting voltage. The airflow sensor 140 is, for example, a MEMS sensor or a microphone, and the heating element 130 is, for example, a heating wire, a ceramic seat containing the heating wire or the heating wire, or other conventional heating elements.

Referring to fig. 1 and fig. 2, in the present embodiment, the system control circuit 200 includes a power supply terminal BAT, a power ground terminal GND, an atomization terminal AT, a heating control unit 300, a first switch unit K1, and a second one-way conduction element K2.

In this embodiment, the power supply terminal BAT is electrically connected to the positive electrode of the power supply 110, and the power ground terminal GND is electrically connected to the negative electrode of the power supply 110, so that the system control circuit 200 can be connected to the power supply 110, and the power supply 110 can supply power to the system control circuit 200.

In this embodiment, the first end of the first switch unit K1 is electrically connected to the power supply terminal BAT for electrically connecting to the positive electrode of the power supply 110, the second end of the first switch unit K1 is electrically connected to the atomization end AT, the atomization end AT is further electrically connected to the first end of the heating element 130, the second end of the heating element 130 is electrically connected to the power ground GND, the control end of the first switch unit K1 is electrically connected to the heating control unit 300, and the heating control unit 300 controls whether the first switch unit K1 is turned on or off. In the present embodiment, when the heating control unit 300 controls the first switch unit K1 to be turned on, the heating element 130 is heated, and the heating element 130 heats the liquid in the electronic atomization device, such as tobacco tar, so that the relevant liquid is atomized for the user to suck; when the heating control unit 300 controls the first switch unit K1 to be turned off, the heating element 130 stops heating, and the heating element 130 does not atomize the liquid in the electronic atomization device. In this embodiment, the first switch unit K1 is a PMOS transistor. Of course, in other embodiments of the present application, the first switching unit K1 may also be an NMOS transistor or other field effect transistor.

In this embodiment, the second one-way conduction element K2 is a two-terminal element, in fig. 2, the second one-way conduction element K2 is a diode, an anode of the diode is a first terminal and is electrically connected to the power supply terminal BAT, a cathode of the diode is a second terminal and is electrically connected to the first indicator light 120, where the second terminal of the second one-way conduction element K2 may be directly electrically connected to the first terminal of the first indicator light 120, and other components, such as a current limiting resistor Rx, may also be present between the second terminal of the second one-way conduction element K2 and the first indicator light 120.

In this embodiment, the second end of the second one-way conduction element K2 is further electrically connected to the first end of the first capacitor C1, and the second end of the first capacitor C1 is electrically connected to the atomization end AT. Specifically, the second end of the first capacitor C1 is electrically connected to the power ground GND via the atomization end AT and the heating element 130. In this embodiment, the first switch unit K1 and the second one-way conduction element K2 form a first voltage boost unit, an output end of the first voltage boost unit is electrically connected to the first indicator light 120, and the first voltage boost unit can make an output voltage approximately 2 times a voltage of the power supply terminal BAT. Of course, in other embodiments of the present application, the first voltage boosting unit may output the voltage equal to other multiples of the voltage of the power supply terminal BAT, for example, 1.5 times, 3 times, 4 times, and the like.

In this embodiment, when the electronic atomization device is in a pumping state, the switch control unit controls the first switch unit K1 to be turned off in a first period, and since the voltage of the power supply terminal BAT is higher, the second one-way conduction element K2 is automatically turned on, the power supply 110 forms a charging loop via the power supply terminal BAT, the second one-way conduction element K2, the first capacitor C1 and the heating element 130, the first capacitor C1 is charged, and the voltage on the first capacitor C1 is charged to be approximately the same as the voltage of the power supply 110 (the conduction voltage drop of the diode needs to be reduced); when the switch control unit controls the first switch unit K1 to be turned on in the second period, the voltage at the second end of the first switch unit K1 is the power supply 110 voltage and is Vbat, that is, the voltage at the second end of the first capacitor C1 is Vbat, because the voltage on the first capacitor C1 cannot be suddenly changed, the potential at the first end of the first capacitor C1 is approximately raised to 2Vbat (the turn-on voltage drop of the diode needs to be reduced), that is, approximately twice the power supply 110 voltage, at this time, because the voltage at the second end of the second unidirectional conducting element K2 is greater than the voltage at the first end thereof, the second unidirectional conducting element K2 is automatically turned off, and because the potential at the first end of the first capacitor C1 is raised to approximately 2Vbat, even though the power supply 110 is the low-voltage power supply 110, the power supply voltage range of the low-voltage power supply 110 is 1.5V-3.6V, the power supply voltage range of approximately twice the Vbat is generally greater than 3V, so that most of the power supply 120 of the first indicator lamp 120 can be normally driven at the first indicator lamp 120.

In this embodiment, the first switch unit K1 may control whether the heating element 130 generates heat or not, and may also correspondingly control whether the first capacitor C1 boosts voltage, that is, the first switch unit K1 has at least two functions. Specifically, when the heating control unit 300 controls the first switch unit K1 to turn off, the heating element 130 does not generate heat, and the first capacitor C1 is charged, so that the first capacitor C1 is charged to a voltage approximately equal to the voltage of the power supply terminal BAT; when the heating control unit 300 controls the first switch unit K1 to be turned on, the heating element 130 generates heat to atomize the liquid in the electronic atomizer, and meanwhile, the potential of the second end of the first capacitor C1 is the voltage of the power supply 110, so that the potential of the first end of the first capacitor C1 is raised, the second one-way conduction element K2 is turned off, and meanwhile, the voltage of the first end of the first capacitor C1 is greater than or equal to the minimum conduction voltage of the first indicator 120, and can be used for driving the first indicator 120 to be turned on, that is, in this embodiment, the first indicator 120 may be turned on only when the heating element 130 is operated to generate heat, and the first indicator 120 may not be turned on when the heating element 130 is not operated to generate heat. In this embodiment, the second end of the first capacitor C1 is electrically connected to the atomization end AT, and the system control circuit 200 does not need to separately add a terminal connected to the second end of the first capacitor C1, so that the number of terminals can be reduced, which is beneficial to reducing the cost. In addition, the first switch unit K1 is shared in the embodiment, and a switch unit for boosting is not required to be additionally arranged, so that the cost is reduced.

In the present embodiment, the system control circuit 200 further includes a suction detection unit (not shown), which is electrically connected to the airflow sensor 140. The suction detection unit is also electrically connected to the heat generation control unit 300. When the suction detection unit detects that the user sucks the electronic atomization device, the suction detection unit judges that the electronic atomization device is in a suction state, and the suction detection unit outputs a first signal to the heating control unit 300; when the suction detection unit does not detect that the user sucks the electronic atomization device, the suction detection unit judges that the electronic atomization device is in a non-suction state, and the suction detection unit outputs a second signal to the heating control unit 300. In this embodiment, the heating control unit 300 outputs a switching signal to the control terminal of the first switching unit K1 when the heating control unit 300 receives the first signal, and the heating control unit 300 controls the first switching unit K1 to be normally turned off when the heating control unit 300 receives the second signal. In this embodiment, the switching signal is preferably a duty cycle signal, the duty cycle signal includes a periodic low level and a periodic high level, when the duty cycle signal is at the low level, the first switching unit K1 is turned on, the heating element 130 generates heat, the first end of the first capacitor C1 is boosted, and the second unidirectional conducting element K2 is turned off; when the duty ratio signal is at a high level, the first switching unit K1 is turned off, the second one-way conduction element K2 is turned on, and the first capacitor C1 is charged.

In an embodiment, the heating control unit 300 controls whether the first switch unit K1 is turned on or not through a PWM (pulse width modulation) method, where a frequency (period) is constant and an on-time and an off-time of the first switch unit K1 are adjustable, and in this way, the first switch unit K1 is turned on during the on-time of one period and the first switch unit K1 is turned off during the off-time. In addition, in other embodiments of the present application, the system control unit may further control whether the heating element 130 works or not through a PFM (pulse frequency modulation) mode, where the frequency (period) of the PFM mode is adjustable, and the on-time or off-time of the first switch unit K1 is not changed, and in this way, the first switch unit K1 is turned on during the on-time of one period, and the first switch unit K1 is turned off during the off-time. The PWM mode and the PFM mode can realize constant power and constant voltage output of the electronic atomization apparatus, and when the electronic atomization apparatus is in a non-suction state, the heating control unit 300 stops driving the first switch unit K1, the first switch unit K1 is normally turned off, and the first switch unit K1 does not work at this time. In the present embodiment, the heat generation controlling unit 300 outputs a low level signal at the on-time and the heat generation controlling unit 300 outputs a high level signal at the off-time.

In order to effectively control whether the first indicator light 120 is turned on and prevent the first indicator light 120 from being turned on when it is not needed, in the present embodiment, the system control circuit 200 further includes a light control unit 400, and the light control unit 400 is configured to control whether the first indicator light 120 emits light. In this embodiment, please refer to fig. 2 again, the system control circuit 200 further includes a third switch unit K3, the third switch unit K3 is connected in series with the first indicator light 120, in this embodiment, a first end of the third switch unit K3 is electrically connected to a second end of the first indicator light 120 through a current limiting resistor Rx, the second end of the third switch unit K3 is electrically connected to the power ground GND, a control end of the third switch unit K3 is electrically connected to the lighting control unit 400, the lighting control unit 400 is configured to control whether the third switch unit K3 is turned on, the first indicator light 120 may emit light only when the third switch unit K3 is turned on, and the lighting control unit 400 controls the third switch unit K3 to be turned on only when the first indicator light 120 is turned on. In this embodiment, the third switching unit K3 is an NMOS transistor. In addition, in other embodiments of the present application, the current limiting resistor Rx may not be disposed in the branch where the first indicator light 120 and the third switching unit K3 are located. In addition, in another embodiment of the present application, please refer to fig. 3 and fig. 4 in combination, the third switching unit K3 may be further located between the first end of the first indicator light 120 and the second end of the second one-way conduction element K2, specifically, the first end of the third switching unit K3 is electrically connected to the second end of the second one-way conduction element K2, the second end of the third switching unit K3 is electrically connected to the first end of the first indicator light 120 through a current limiting resistor Rx, the second end of the first indicator light 120 is electrically connected to the power ground GND, the control end of the third switching unit K3 is electrically connected to the lighting control unit 400, and here, the third switching unit K3 is a PMOS transistor. In addition, in other embodiments of the present application, the third switch unit K3 may be replaced by a current source, the current source is connected in series with the first indicator light 120, a control end of the current source is electrically connected to the lighting control unit 400, the lighting control unit 400 controls whether the current source operates, the first indicator light 120 may be turned on only when the current source operates, and the first indicator light 120 may not emit light when the lighting control unit 400 controls the current source not to operate. In addition, in other embodiments of the present application, the current limiting resistor Rx may not be disposed on the branch where the third switching unit K3 and the first indicator light 120 are located.

In this embodiment, the first switch unit K1 is turned on, and the light control unit 400 controls the third switch unit K3 to be turned on or the first indicator light 120 emits light when the current source operates, and as long as one of the first switch unit K1 and the third switch unit K3 does not operate, the first indicator light 120 does not emit light, that is, the first switch unit K1 is turned off, or the light control unit 400 controls the third switch unit K3 to be turned off or the light control unit 400 controls the current source to not operate. In this embodiment, when the electronic atomization device is in the suction state, the third switch unit K3 and the first switch unit K1 are turned on or off synchronously, that is, when the first switch unit K1 is turned on, the third switch unit K3 is turned on, when the first switch unit K1 is turned off, the third switch unit K3 is turned off, the heating element 130 generates heat and lights the first indicator light 120 synchronously, that is, the heating time of the heating element 130 is equal to the lighting time of the first indicator light 120, in this case, one implementation manner is that the lighting control unit 400 includes an inverter 321, an input end of the inverter 321 is electrically connected to a control end of the first switch unit K1, and an output end of the inverter 321 is electrically connected to a control end of the third switch unit K3. The present application is not limited thereto, and in other embodiments of the present application, the input terminal of the inverter 321 may also be electrically connected to the heat generation controlling unit 300. In other embodiments of the present application, the heating time of the heating element 130 may be longer than the light emitting time of the first indicator light 120, and at this time, when the first switch unit K1 is turned on, the light control unit 400 may control the third switch to be turned on after a certain time lag, and both are turned off at the same time, or the light control unit 400 may control the third switch unit K3 to be turned on at the same time as the first switch unit K1, and the light control unit 400 controls the third switch unit K3 to be turned off in advance relative to the first switch unit K1, or the light control unit 400 may control the third switch to be turned on after a certain time lag, and the light control unit 400 controls the third switch unit K3 to be turned off in advance relative to the first switch unit K1. In addition, in another embodiment of the present application, the third switching unit K3 may be replaced by a current source, the current source may be turned on corresponding to the third switching unit K3 when operating, and the current source may be turned off corresponding to the third switching unit K3 when not operating. This arrangement allows the timing and the length of time of the first indicator light 120 to be controlled as desired.

In this embodiment, please refer to fig. 1 and fig. 2 in combination, the system control circuit 200 is located on the same chip, which is called a system control chip, the power supply terminal BAT is a power supply pin BAT, the power ground terminal GND is a power ground pin GND, and the atomization terminal AT is an atomization pin AT, the system control chip further includes a first light emitting pin FG1 and a second light emitting pin FG2, wherein the first light emitting pin FG1 is used to be electrically connected to the first end of the first capacitor C1 and the first end of the first indicator light 120, the atomization pin AT is used to be electrically connected to the second end of the first capacitor C1 and the heating element 130, and the second light emitting pin FG2 is used to be electrically connected to the second end of the first indicator light 120 and the third switch unit K3. In this embodiment, the system control chip further includes an airflow detection pin SW, the airflow detection pin SW is electrically connected to the airflow sensor 140, the airflow sensor 140 is, for example, a capacitive microphone, a switching microphone, a MEMS sensor, etc., the airflow detection pin SW is electrically connected to the suction detection unit, and the suction detection unit and the airflow sensor 140 can detect whether the electronic atomization device is in a suction state or a non-suction state. In addition, in other embodiments of the present application, the system control chip may further integrate the first capacitor C1. In addition, in other embodiments of the present application, the system control chip may further integrate the airflow sensor 140, that is, the airflow sensor 140 and the system control circuit 200 are located on the same chip. In addition, in other embodiments of the present application, the first switch unit K1 may not be located on the system control chip, in which case the first switch unit K1 is located outside the system control chip, and the first switch unit K1 may be located on another chip or not located on the chip. In addition, in another embodiment of the present application, please refer to fig. 3 and fig. 4 in combination, the system control chip includes a first light emitting pin FG1 and a second light emitting pin FG2, wherein the first light emitting pin FG1 is configured to be electrically connected to a first end of the first capacitor C1 and a second end of the second one-way conduction element K2, the second light emitting pin FG2 is electrically connected to a first end of the first capacitor C1 through the current limiting resistor Rx, the third switching unit K3, and the first light emitting pin FG1, the second light emitting pin FG2 is electrically connected to a second end of the second one-way conduction element K2 through the current limiting resistor Rx and the third switching unit K3, the second light emitting pin FG2 is further configured to be electrically connected to a first end of the first indicator light 120, and a second end of the first indicator light 120 is electrically connected to the power ground pin GND.

In the present embodiment, the indicating component includes the first indicator light 120, and the first indicator light 120 may be fully turned on, may be turned on in part of the time, or may not be turned on when the heating element 130 generates heat. In order to realize the indication by the indicator light even when the heating element 130 is not in operation, in other embodiments of the present application, the indication assembly may further include a second indicator light, the second indicator light is not controlled by the first switch unit K1, the second indicator light is controlled by other means, and the second indicator light is used for indicating other states of the electronic atomization device, such as whether to charge or not.

In this embodiment, the electronic atomization device further includes a receiving device, the receiving device is hollow and is used for receiving liquid, the liquid is, for example, tobacco tar, medical liquid, cosmetic liquid, etc., the receiving device is, for example, a smoke cartridge, etc., the heating element 130 is also located in the receiving device, the heating element 130 is in contact with the liquid, when the heating control unit 300 controls the first switch unit K1 to be turned on, the heating element 130 generates heat to atomize the liquid, and the liquid becomes gas, which can be sucked by a user or used by the user as other functions.

In this embodiment, the second one-way conduction element K2 is a diode, and there is a conduction voltage drop that cannot be ignored when the diode is turned on, and the conduction voltage drop is generally 0.7V, for example, when the low voltage power supply 110 is 1.6V, when the first switch unit K1 is turned off, the second one-way conduction element K2 is turned on, and at this time, the voltage on the first capacitor C1 is charged to 0.9V (1.6V-0.7V); when the first switch unit K1 is turned on, the potential at the first end of the first capacitor C1 is raised to (1.6 + 0.9) V, which is 2.5V, and the first indicator lamp 120 cannot be driven to emit light normally, and the voltage of the low voltage power source 110 needs to be further raised, for example, the low voltage of the low voltage power source 110 is raised to 2V, so that the indicator lamp can emit light normally, that is, the first indicator lamp 120 cannot emit light in the whole power supply range of the low voltage power source 110, and can emit light only in a part of the power supply range of the low voltage power source 110. In order to solve this problem, the present application provides a second embodiment.

Second embodiment

Referring to fig. 5, fig. 5 is a partial specific circuit diagram of an indicating assembly according to a second embodiment of the present application, which is similar to the first embodiment, so that the undescribed portions of the present embodiment can refer to the first embodiment, and the main difference between the present embodiment and the first embodiment is that the second unidirectional conducting element K2 includes a second switch unit.

Referring to fig. 3 and fig. 5, in the present embodiment, the heating control unit 300 further includes a second driving unit 320 and a heating logic unit 330, the second unidirectional conductive element K2 is a three-terminal element, the second unidirectional conductive element K2 includes a second switching unit, a first end of the second switching unit is electrically connected to the power supply terminal BAT, a second end of the second switching unit is used to be electrically connected to a first end of the first capacitor C1 and a first end of the first indicator light 120, a control end of the second switching unit is electrically connected to the second driving unit 320, an input end of the second driving unit 320 is electrically connected to the heating logic unit 330 or a control end of the first switching unit K1, and an example that an input end of the second driving unit 320 is electrically connected to a control end of the first switching unit K1 is described in the present embodiment.

Referring to fig. 5, in the present embodiment, the second switch unit is a PMOS transistor, and when the second switch unit is turned on, the conduction voltage drop of the second switch unit is very small, generally smaller than 0.1V, and the conduction voltage drop is negligible with respect to the conduction voltage drop of the diode. In this embodiment, the second driving unit 320 includes an inverter 321 (the inverter 321 is also called a not gate), a second NMOS transistor NM2, a third NMOS transistor NM3, a second PMOS transistor PM2, and a third PMOS transistor PM3. The input end of the phase inverter 321 (the input end of the second driving unit 320) is electrically connected to the control end of the first switch unit K1, the output end of the phase inverter 321 is electrically connected to the control end of the second NMOS transistor NM2, the source of the second NMOS transistor NM2 is electrically connected to the power ground GND, the drain of the second NMOS transistor NM2 is electrically connected to the drain of the second PMOS transistor PM2 and the control end of the third PMOS transistor PM3, the control end of the second PMOS transistor PM2 is electrically connected to the drain of the third NMOS transistor NM3, the source of the second PMOS transistor PM2 is electrically connected to the first end of the first capacitor C1, the source of the third NMOS transistor is electrically connected to the power ground GND, the control end of the third NMOS transistor (the input end of the second driving unit 320) is electrically connected to the control end of the first switch unit K1, the drain of the third NMOS transistor NM3 is also electrically connected to the drain of the third PMOS transistor PM3, the source of the third PMOS transistor PM3 is electrically connected to the first end of the first capacitor C1, and the drain of the third NMOS transistor NM3 is also used to control whether the second switch unit is turned on or not. In this embodiment, the drain of the third NMOS transistor NM3 is directly electrically connected to the control terminal of the second switch unit, but the present application is not limited thereto, and in other embodiments of the present application, in order to enhance the driving capability, a plurality of inverters 321, for example, 2, 4, and 6 inverters 321, may be further disposed between the drain of the third NMOS transistor NM3 and the control terminal of the second switch unit, and the inverters 321 is formed by, for example, CMOS transistors. In addition, in other embodiments of the present application, the second switch unit may also be an NMOS transistor, and at this time, the second driving unit 320 further includes a second voltage boost circuit, where the second voltage boost circuit is used to drive the second switch unit to be turned on, and a voltage boosted by the second voltage boost circuit is greater than a voltage of the power supply 110 to control the second switch unit to be turned on; the second boost circuit may be a conventional boost circuit in the art, such as a boost circuit, a charge pump, etc., and will not be described herein.

In this embodiment, the first switch unit K1 is a PMOS transistor. In addition, in other embodiments of the present application, the first switching unit K1 may also be an NMOS transistor. In this embodiment, the heat generation controlling unit 300 further includes a first driving unit 310, and the first driving unit 310 includes a first NMOS transistor NM1 and a first PMOS transistor PM1. The source electrode of the first NMOS transistor NM1 is electrically connected to the power ground GND, the control end of the first NMOS transistor NM1 is electrically connected to the heating logic unit 330, the drain electrode of the first NMOS transistor NM1 is electrically connected to the drain electrode of the first PMOS transistor PM1, the control end of the first PMOS transistor PM1 is electrically connected to the heating logic unit 330, the source electrode of the first PMOS transistor PM1 is electrically connected to the power supply terminal BAT, and the drain electrode of the first NMOS transistor NM1 is further used for controlling whether the first switch unit K1 is turned on or not. In this embodiment, the drain of the first NMOS transistor NM1 is directly electrically connected to the control terminal of the first switch unit K1, but the present invention is not limited thereto, and in other embodiments of the present invention, in order to enhance the driving capability, a plurality of inverters 321, for example, 2, 4, or 6 inverters 321, may be further disposed between the drain of the first NMOS transistor NM1 and the control terminal of the first switch unit K1.

In this embodiment, the heating logic unit 330 is electrically connected to the suction detection unit, when the suction detection unit detects a suction action of a user, the suction detection unit determines that the electronic atomization apparatus is in a suction state, the suction detection unit outputs a first signal to the heating logic unit 330, the heating logic unit 330 controls the first switch unit K1 to be turned off and turned on and the second one-way conduction element K2 to be turned on during a first period, at this time, the first capacitor C1 is charged, the heating logic unit 330 controls the first switch unit K1 to be turned on and the second one-way conduction element K2 to be turned off and turned on during a second period, at this time, the potential of the first end of the first capacitor C1 is raised to twice the voltage of the power supply 110, so that the first indicator light 120 may be turned on. In this embodiment, the first switch unit K1 is driven by a PWM mode or a PFM mode, the first time period corresponds to an off-time, the second time period corresponds to an on-time, and the time length of the first time period and the second time period in one cycle is determined by a constant power or a constant voltage. In the embodiment, the first switch unit K1 and the second one-way conduction element K2 are not turned on simultaneously, but may be turned off simultaneously in some time periods, for example, when the electronic atomization device is in a non-suction state.

In this embodiment, since the second unidirectional conducting element K2 is the second switch unit, for example, the second switch unit is a PMOS transistor or an NMOS transistor, and the conducting voltage drop of the PMOS transistor or the NMOS transistor is less than 0.1V, compared with the conducting voltage drop of the diode of the first embodiment, which is 0.7V, the conducting voltage drop of the second unidirectional conducting element K2 is greatly reduced in this embodiment, so that the first indicator light 120 can be turned on in the whole power supply range of the low-voltage power supply 110. For example, when the low voltage power supply 110 is 1.6V, when the first switch unit K1 is turned off and the second one-way conduction element K2 is turned on, the voltage on the first capacitor C1 is charged to the voltage of the power supply 110, which is 1.6V, because the conduction voltage drop of the PMOS transistor or the NMOS transistor is almost negligible; when the first switch unit K1 is turned on and the second unidirectional conducting element K2 is turned off, the potential of the first end of the first capacitor C1 is raised to 1.6+1.6V, which is 3.2V, and is greater than the minimum conducting voltage of the first indicator 120, so that the indicator can be normally driven to emit light. The first indicator light 120 of the present embodiment can emit light in nearly the entire power supply range of the low voltage power supply 110, and the power supply range of the low voltage power supply 110 may not be adjusted. Moreover, the second one-way conduction element K2 of the present embodiment is a controllable element, which is convenient to control.

It should be understood that reference herein to "a plurality" means two or more. Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.

Claims

1. A system control circuit for driving an indicator light of an electronic atomizer, comprising:

the heating control unit comprises a power supply end, a power supply grounding end and a heating control unit, wherein the power supply end and the power supply grounding end are correspondingly electrically connected with the positive pole and the negative pole of a power supply;

the atomization end is used for being electrically connected with the first end of the heating element, the power supply grounding end is used for being electrically connected with the second end of the heating element, and the atomization end is used for being electrically connected with the second end of the first capacitor;

the first end of the first switch unit is electrically connected with the power supply end of the power supply, the second end of the first switch unit is electrically connected with the atomization end, and the control end of the first switch unit is electrically connected with the heating control unit;

a first end of the second unidirectional conduction element is electrically connected with the power supply end of the power supply, and a second end of the second unidirectional conduction element is electrically connected with a first end of the first capacitor and the indicator light;

the first switch unit is turned off, the second one-way conduction element is turned on to charge the first capacitor, and the first switch unit is turned on, and the second one-way conduction element is turned off to raise the potential of the first end of the first capacitor so as to drive the indicator light.

2. The system control circuit according to claim 1, wherein the second unidirectional conducting element comprises a second switch unit, a control terminal of the second switch unit is electrically connected to the heating control unit, the heating control unit controls the first switch unit to be turned off and the second switch unit to be turned on to charge the first capacitor, and the heating control unit controls the first switch unit to be turned on and the second switch unit to be turned off to raise a potential of the first terminal of the first capacitor for driving the indicator light.

3. The system control circuit according to claim 2, wherein the heating control unit comprises a second driving unit, and an output terminal of the second driving unit is used for controlling whether the second switching unit is conducted.

4. The system control circuit according to claim 3, wherein the second switch unit includes a PMOS transistor, the second driver unit includes an inverter, a second NMOS transistor, a third NMOS transistor, a second PMOS transistor, and a third PMOS transistor, wherein an input terminal of the inverter is electrically connected to a control terminal of the first switch unit, an output terminal of the inverter is electrically connected to a control terminal of the second NMOS transistor, a source of the second NMOS transistor is electrically connected to a power ground terminal, a drain of the second NMOS transistor is electrically connected to a drain of the second PMOS transistor and a control terminal of the third PMOS transistor, respectively, a control terminal of the second PMOS transistor is electrically connected to a drain of the third NMOS transistor, a source of the second PMOS transistor is electrically connected to a second terminal of the second switch unit, a source of the third NMOS is electrically connected to the power ground terminal, a control terminal of the third NMOS is electrically connected to a control terminal of the first switch unit, a drain of the third NMOS transistor is also electrically connected to a drain of the third PMOS transistor, a source of the third PMOS transistor is electrically connected to a second terminal of the first switch unit, and a drain of the third NMOS transistor is also used to control whether the second switch unit is turned on; alternatively, the first and second liquid crystal display panels may be,

the heating control unit also comprises a heating logic unit, and the input end of the second driving unit is electrically connected with the heating logic unit; alternatively, the first and second liquid crystal display panels may be,

the heating control unit further comprises a heating logic unit, the second switch unit comprises an NMOS (N-channel metal oxide semiconductor) tube, the second drive unit comprises a second booster circuit, the output end of the second booster circuit is electrically connected with the control end of the second switch unit, and the input end of the second drive unit is electrically connected with the heating logic unit; alternatively, the first and second liquid crystal display panels may be,

when the second switch unit is turned on, the voltage between the source and the drain is less than 0.1V.

5. The system control circuit of claim 1, wherein the second unidirectional conducting element comprises a diode, an anode of the diode is a first end of the second unidirectional conducting element, and a cathode of the diode is a second end of the second unidirectional conducting element.

6. The system control circuit according to any one of claims 1 to 5, wherein the first switch unit comprises a PMOS tube, a source electrode of the PMOS tube is electrically connected with a power supply end, a drain electrode of the PMOS tube is electrically connected with the atomization end, and a control end of the PMOS tube is electrically connected with the heating control unit; alternatively, the first and second electrodes may be,

7. The system control circuit according to any one of claims 1 to 5, wherein the system control circuit is located on the same chip or a circuit of the system control circuit except the first switch unit is located on the same chip, the power supply terminal is a power supply pin, the power ground terminal is a power ground pin, and the atomization terminal is an atomization pin, the system control circuit further comprises a first light emitting pin and a second light emitting pin, the first light emitting pin is used for being electrically connected with a first terminal of the first capacitor, a first terminal of the indicator light and a second terminal of the second one-way conduction element, and the second light emitting pin is used for being electrically connected with a second terminal of the indicator light; alternatively, the first and second liquid crystal display panels may be,

the system control circuit is positioned on the same chip or circuits of the system control circuit except the first switch unit are positioned on the same chip, the power supply end is a power supply pin, the power grounding end is a power grounding pin, the atomizing end is an atomizing pin, the system control circuit further comprises a first light-emitting pin and a second light-emitting pin, the first light-emitting pin is used for being electrically connected with a first end of a first capacitor and a second end of a second one-way conduction element, the second light-emitting pin is used for being electrically connected with a first end of an indicator light, and the power grounding pin is used for being electrically connected with a second end of the indicator light; alternatively, the first and second liquid crystal display panels may be,

8. An indicating component of an electronic atomization device is characterized by comprising

The system control circuit of any of claims 1-7;

the indicating lamp is electrically connected with the second end of the second unidirectional conducting element;

9. The indication assembly of claim 8, wherein the power source is a cell providing a supply voltage ranging from 1.5V to 3.6V; alternatively, the first and second liquid crystal display panels may be,

10. An electronic atomizer, comprising:

a system control circuit as claimed in any one of claims 1 to 7 or an indication assembly as claimed in any one of claims 8, 9;

a containing device, which is hollow for containing liquid;