CN215010172U

CN215010172U - Resonant oscillation circuit and electronic cigarette

Info

Publication number: CN215010172U
Application number: CN202120729060.2U
Authority: CN
Inventors: 何永平
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2021-12-03
Anticipated expiration: 2031-04-09

Abstract

The utility model discloses a resonance oscillation circuit and electronic cigarette, wherein, resonance oscillation circuit includes resonance energy output device, resonance unit and resonance drive circuit; the resonance energy output device is connected with the resonance unit electricity to constitute resonant circuit, resonance drive circuit with resonant circuit connects to according to resonant circuit's feedback signal, adjust the frequency of exporting to resonant circuit's alternating current signal, make alternating current signal's frequency is unanimous with resonant circuit's natural frequency, so that resonant circuit produces resonant oscillation, and then makes resonance energy output device work, converts alternating current signal into sound wave output, the utility model provides high resonance oscillation circuit has reduced resonance oscillation circuit's reactive power to resonance energy output device's driving force, has promoted resonance oscillation circuit's efficiency.

Description

Resonant oscillation circuit and electronic cigarette

Technical Field

The utility model relates to an electronic circuit technical field, in particular to resonant oscillation circuit and electron cigarette

Background

The driving of the piezoelectric ceramic piece needs an alternating current signal for driving so as to generate sound waves, and in many cases, the piezoelectric ceramic piece cannot be driven to generate sound waves because no alternating current signal exists and only a lithium battery or other direct current power supplies are used for supplying power.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a resonant oscillation circuit and electron cigarette aims at making resonance energy output devices such as piezoceramics piece take place the resonance to produce the sound wave.

In order to achieve the above object, the present invention provides a resonant oscillation circuit, the resonant wave generating circuit includes:

a resonant energy output device;

the resonance unit is electrically connected with the resonance energy output device and forms a resonance circuit with the resonance energy output device;

and the resonance driving circuit is connected with the resonance circuit and is used for driving the resonance circuit to generate resonance so that the resonance energy output device outputs the energy generated by the resonance circuit.

Optionally, the resonance unit includes:

the first inductor, the first capacitor and the first resistor; wherein the content of the first and second substances,

the first end of the first inductor is connected with the resonance driving circuit, the second end of the first inductor is connected with the first end of the first capacitor, the second end of the first capacitor is grounded, the common end of the second end of the first inductor and the first end of the first capacitor is connected with the first end of the resonance energy output device, the second end of the resonance energy output device is connected with the first resistor, and the second end of the first resistor is grounded.

Optionally, the resonant driving circuit comprises:

a switching circuit;

the first end of the energy storage element is connected with the input end of the switch circuit, and the second end of the energy storage element is connected with the first end of the resonant circuit; the energy storage element is used for discharging when the switching circuit is switched on and charging when the switching circuit is switched off.

And the detection end of the comparison control circuit is connected with the second end of the resonant circuit, the output end of the comparison control circuit is connected with the switch circuit, and the comparison control circuit is used for controlling the on/off of the switch circuit according to the output signal of the resonant circuit so as to control the charging/discharging of the energy storage element and drive the resonant circuit to generate resonance.

Optionally, the comparison control circuit comprises:

a comparator, a first voltage dividing circuit and a second voltage dividing circuit; wherein the content of the first and second substances,

the input end of the first voltage division circuit is connected with the second end of the resonance circuit, and the output end of the first voltage division circuit is connected with the inverting input end of the comparator; the input end of the second voltage division circuit is connected with a power supply, and the output end of the second voltage division circuit is connected with the non-inverting input end of the comparator. The comparator enabling circuit is connected with an enabling end of the comparator.

Optionally, the resonant driving circuit further comprises:

an enable circuit connected to the compare control circuit.

Optionally, the switching circuit comprises: an electronic switch and a second resistor;

the common end of the input end of the electronic switch is connected with a power supply, the output end of the electronic switch is grounded, and the controlled end of the electronic switch is connected with the output end of the comparator; the controlled end of the electronic switch is connected with the comparison control circuit; the first end of the second resistor is connected with the controlled end of the electronic switch, and the second end of the second resistor is grounded.

Optionally, the resonant driving circuit further comprises:

and the input end of the booster circuit is connected with the power supply, and the output end of the booster circuit is connected with the first end of the energy storage element.

Optionally, the boost circuit comprises:

a second inductor and a third capacitor;

the first end of the second inductor is connected with the first end of the third capacitor, the second end of the second inductor is connected with the second end of the third capacitor, the common end of the first end of the second inductor and the first end of the third capacitor is the input end of the booster circuit, and the common end of the second inductor and the second end of the third capacitor is the output end of the booster circuit.

Optionally, the resonant oscillating circuit further includes a fourth capacitor and a fifth capacitor;

the first end of the fourth capacitor is connected with a power supply, and the second end of the fourth capacitor is grounded; and the first end of the fifth capacitor is connected with a power supply, and the second end of the fifth capacitor is grounded.

The utility model discloses still provide an electron cigarette, the electron cigarette includes atomizing cavity and foretell resonant oscillation circuit.

The utility model discloses technical scheme is through constituteing resonant circuit with resonance energy output device and resonance unit, recycle resonance drive circuit output alternating current signal drive resonance unit, and according to resonant circuit's feedback signal, adjust the frequency of the alternating current signal of output, make this alternating current signal's frequency unanimous with resonant circuit's natural frequency, produce the resonance with drive resonant circuit, and then make resonance energy output device among the resonant circuit produce the resonance, convert the energy that resonant circuit produced to the sound wave after output, thereby the sound wave can be broken up the molecular bond between liquid hydrone and produce the elegant water smoke of nature. The utility model discloses a constitute resonant circuit with resonance energy output device and resonance unit to make resonant circuit be in the resonance state, reactive power when can avoiding resonant circuit oscillation, and can make resonant circuit's total impedance minimum, and then make the electric current of flowing through resonant circuit reach the maximum value, thereby better drive resonance energy output device. The utility model discloses only need adjust resonant circuit's component parameter, can adjust the feedback signal of resonant circuit's output and resonant circuit's natural frequency, and then resonant frequency when adjusting resonant circuit resonance to adjust the sound wave frequency of resonant energy output device output, make the sound wave be the ultrasonic wave, the regulation mode is simple, adjusts with low costsly.

Drawings

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

Fig. 1 is a circuit diagram of an embodiment of the resonant oscillating circuit of the present invention;

fig. 2 is a circuit diagram of another embodiment of the resonant oscillating circuit of the present invention;

fig. 3 is a circuit diagram of another embodiment of the resonant oscillating circuit of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Resonant energy output device	C1～C5	First to fifth capacitors
20	Resonance unit	D1	Piezoelectric ceramic piece
				30	Resonant drive circuit	U1	Comparator with a comparator circuit
R1～R7	First to seventh resistors	Q1	Electronic switch
				L1、L2	First inductor and second inductor	E1	Electromagnetic heater

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a resonant oscillation circuit is applicable to in the electron cigarette, sound wave resonant circuit can produce the ultrasonic wave, breaks up the molecular bond between liquid hydrone and produces the elegant water smoke naturally.

In an embodiment of the present invention, the resonant oscillating circuit includes:

a resonant energy output device 10;

a resonance unit 20 electrically connected to the resonance energy output device 10 and constituting a resonance circuit with the resonance energy output device 10;

and a resonance driving circuit 30 connected to the resonance circuit, wherein the resonance driving circuit 30 is configured to drive the resonance circuit to generate resonance, so that the resonance energy output device 10 outputs the energy generated by the resonance circuit.

Wherein, the resonance energy output device 10 can be a piezoelectric ceramic piece D1 or an electromagnetic heater E1. The selection is specifically performed according to actual requirements, and is not limited herein.

The resonance unit 20 at least includes a resonance inductor and a resonance capacitor;

referring to fig. 3, when the resonant energy output device 10 is the electromagnetic heater E1, the resonant unit 20 itself constitutes a resonant circuit, the electromagnetic heater E1 is coupled to a resonant inductor in the resonant unit 20, and when the resonant unit 20 resonates, the resonant inductor generates an alternating magnetic field that changes at a high speed, thereby driving the electromagnetic heater E1 to operate.

Referring to fig. 2, when the resonant energy output device 10 is a piezoceramic sheet D1; the piezoelectric ceramic plate D1 is equivalent to a capacitor, and may be disposed in parallel with the resonant capacitor in the resonant unit 20, and the piezoelectric ceramic plate D1 may compensate the capacitance of the resonant capacitor in the resonant unit 20, so that the circuit formed by the piezoelectric ceramic plate D1 and the resonant unit 20 is a resonant circuit. When the resonance circuit resonates, the piezoceramic sheet D1 passes through the alternating current, thereby converting the alternating current into sound wave output. Of course, in other embodiments, the piezoelectric ceramic piece D1 may be connected in series, which is not limited herein, and the circuit formed by the piezoelectric ceramic piece D1 and the resonant unit 20 may be a resonant circuit.

The resonant circuit comprises a first end used for accessing an alternating current signal and a second end used for outputting a feedback signal.

The resonance driving circuit 30 is configured to, according to a feedback signal of a resonance circuit (hereinafter, referred to as a resonance circuit for short) composed of the resonance unit 20 and the resonance energy output device 10, indicate that a change frequency of the feedback signal output by the resonance circuit is identical to a change frequency of a current flow direction of the resonance circuit, when the current flow direction of the resonance circuit changes, the feedback signal output by the resonance circuit also changes, and the change frequency of the current of the resonance circuit is related to a charging speed of a resonance capacitor and a resonance inductor of the resonance circuit, so that the change frequency of the feedback signal output by the resonance circuit is identical to a natural frequency of the resonance circuit;

the resonant driving circuit 30 may be a circuit capable of converting a dc signal into an ac signal and outputting the ac signal, and the frequency of the output ac signal may be adjusted according to a feedback signal, and specifically, the resonant driving circuit 30 at least includes a feedback signal receiving end for receiving the feedback signal, a signal output end for outputting the ac signal, and a power supply end for accessing the dc signal; specifically, a feedback signal receiving end of the resonant driving circuit 30 is connected to a second end of the resonant circuit, and a signal output end of the resonant driving circuit 30 is connected to a first end of the resonant circuit; the power source terminal of the resonant driving circuit 30 is connected to a dc power source. In this embodiment, the resonant driving circuit 30 adjusts the frequency of the ac signal output to the resonant circuit, that is, the current output by the resonant circuit, according to the feedback signal of the resonant circuit, and adjusts the frequency of the ac current signal output to the resonant circuit, so that the resonant circuit resonates, that is, the resonant driving circuit 30 and the resonant circuit form a resonant oscillating circuit;

thereby causing the resonance energy output device 10 in the resonance circuit in the resonance state to resonate, and further causing the resonance energy output device 10 to convert the resonance energy into thermal energy or ultrasonic wave for output.

In addition, when the resonant circuit is in the resonant state, the total impedance of the resonant circuit is minimum, so that the current flowing through the resonant circuit reaches the maximum value, the resonant energy output device 10 can be better driven to work, and the resonant circuit in the resonant state does not generate the idle power, so that the working efficiency of the resonant energy output device 10 is improved.

The utility model discloses technical scheme is through constituteing resonant circuit with resonance energy output device 10 and resonant unit 20, recycle resonance drive circuit 30 output alternating current signal drive resonant unit 20, and according to resonant circuit's feedback signal, adjust the alternating current signal's of output frequency, make this alternating current signal's frequency unanimous with resonant circuit's natural frequency, produce the resonance with drive resonant circuit, and then make resonance energy output device 10 among the resonant circuit produce the resonance, the energy output that resonant circuit produced, for example when resonance energy output device 10 is piezoceramics piece D1, can convert resonance energy into the sound wave, thereby the sound wave can be broken up the molecular bond between liquid hydrone and produce the elegant water smoke naturally. When the resonant energy output device 10 is an electromagnetic heater E1, the resonant energy can be converted to a thermal energy output. The utility model discloses a make resonant circuit be in the resonance state, reactive power when can avoiding resonant circuit oscillation, and can be so that resonant circuit's total impedance is minimum, and then make the electric current of flowing through resonant circuit reach the maximum value to better drive resonant energy output device 10. The utility model discloses only need adjust resonant circuit's component parameter, can adjust the feedback signal of resonant circuit's output and resonant circuit's natural frequency, and then resonant frequency when adjusting resonant circuit resonance to adjust the energy of resonance energy output device 10 output, the regulative mode is simple, adjusts with low costsly.

In one embodiment, the resonance unit 20 includes:

a first inductor L1, a first capacitor C1, and a first resistor R1; wherein the content of the first and second substances,

the first end of the first inductor L1 is connected to the resonant driving circuit 30, the second end of the first inductor L1 is connected to the first end of the first capacitor C1, the second end of the first capacitor C1 is grounded, the common end of the second end of the first inductor L1 and the first end of the first capacitor C1 is connected to the first end of the resonant energy output device 10, the second end of the resonant energy output device 10 is connected to the first resistor R1, and the second end of the first resistor R1 is grounded.

In this embodiment, the resonant energy output device 10 is exemplified as a piezoelectric ceramic sheet D1, and in the circuit, the piezoelectric ceramic sheet D1 corresponds to a capacitor. In this embodiment, after the first capacitor C1 is connected in parallel with the piezoelectric ceramic piece D1, the whole parallel body is connected in series with the first inductor L1 to form a series resonant circuit, so that when parameters of the first inductor L1 and the first capacitor C1 are selected, the selection needs to be performed according to the capacitance value of the actually selected piezoelectric ceramic piece D1, so that the total capacitive reactance of the piezoelectric ceramic piece D1 and the first capacitor C1 after being connected in parallel can be matched with the inductive reactance value of the first inductor L1 to form a resonant circuit.

Further, in this embodiment, the first resistor R1 is connected in series with the resonant energy output device 10, so that the current signal output by the resonant energy output device 10 is converted into a voltage signal, and then fed back to the resonant driving circuit 30, and thus the resonant driving circuit 30 only needs to collect the voltage of the first resistor R1 to obtain the feedback signal of the resonant circuit, obviously, the structure of the voltage sampling circuit is simpler than that of the current sampling circuit, so that the circuit structure of the resonant driving circuit 30 can be simplified, and the circuit volume of the resonant oscillation circuit is further reduced.

In another embodiment, when the resonant energy output device 10 is the electromagnetic heater E1, the first end of the first inductor L1 is connected to the resonant driving circuit 30, the second end of the first inductor L1 is connected to the first end of the first capacitor C1, and the second end of the first capacitor C1 and the second end of the first resistor R1 are connected to the ground of the first resistor R1. The first inductor L1 and the first capacitor C1 form a series resonant circuit. The electromagnetic heater E1 is coupled to the first inductor L1, and generates heat energy according to the alternating magnetic field generated by the first inductor L1.

In one embodiment, the resonant driving circuit 30 includes:

a switching circuit;

The first end of the energy storage element is connected with a power supply.

The energy storage element may be a capacitor or other energy storage element; the energy storage element serves to transfer energy therein in the resonant drive circuit 30.

The comparison control circuit can adopt a comparator U1 to compare a feedback signal of the resonant circuit with a preset voltage value (such as a power supply voltage value), and then output a high-low level signal to control the electronic switch Q1 to be turned on/off according to a comparison result; and comparing the acquired voltage value of the feedback signal with a preset voltage value by using processing elements such as an MCU (microprogrammed control unit), an FPGA (field programmable gate array) and the like, and outputting a high-low level signal according to a comparison result to control the on/off of the electronic switch Q1.

In the embodiment, the comparison control circuit controls the on and off of the switch circuit according to the feedback signal of the resonance circuit, when the switch circuit is in the off state, the power supply charges the energy storage element, and when the switch circuit is on, because the voltage at two ends of the energy storage element can not change suddenly, therefore;

the energy storage element is started to discharge, the energy storage element, the switching circuit, the second end of the resonant circuit and the first end of the resonant circuit form a loop, and at the moment, a feedback signal of negative pressure is triggered to the comparison control circuit, so that the comparison control circuit controls the switching circuit to be continuously started; when the energy storage element finishes discharging, because the voltage at the two ends of the resonant circuit can not change suddenly, the resonant circuit starts to discharge, current flows through the first end of the resonant circuit, the second end of the resonant circuit, the power supply and the energy storage element to charge the energy storage element, and at the moment, a positive-voltage feedback signal is triggered to the comparison control circuit, so that the comparison control circuit controls the electronic switch Q1 to be switched off; when the resonant circuit finishes discharging, the energy storage element starts to discharge; so as to alternate. Thereby generating alternate oscillation to make the resonance circuit in a resonance oscillation state, and further to make the resonance energy output device 10 in the resonance circuit in a resonance state, and converting the resonance energy into sound waves for output.

In one embodiment, the comparison control circuit includes:

a comparator U1, a first voltage dividing circuit and a second voltage dividing circuit; wherein the content of the first and second substances,

the input end of the first voltage division circuit is connected with the second end of the resonance circuit, and the output end of the first voltage division circuit is connected with the inverting input end of the comparator U1; the input end of the second voltage division circuit is connected with a power supply, and the output end of the second voltage division circuit is connected with the non-inverting input end of the comparator U1. The enabling circuit of the comparator U1 is connected with the enabling end of the comparator U1.

In this embodiment, the first voltage division circuit and the second voltage division circuit may be formed by voltage division resistors, and the voltage division circuit built by the voltage division resistors has the characteristic of simple circuit structure, so that the volume of the resonant oscillation circuit is reduced.

Specifically, the first voltage dividing circuit includes a third resistor R3 and a fourth resistor R4; a first end of the third resistor R3 is connected with a second end of the resonant circuit, a second end of the third resistor R3 is connected with a first end of the fourth resistor R4, and a second end of the fourth resistor R4 is grounded; the common end of the second end of the third resistor R3 and the first end of the fourth resistor R4 is connected with the inverting input end of the comparator U1; the second voltage division circuit comprises a fifth resistor R5 and a sixth resistor R6, a first end of the fifth resistor R5 is connected with a power supply, a second end of the fifth resistor R5 is connected with a first end of the sixth resistor R6, and a second end of the fifth resistor R5 is grounded; the common end of the second end of the fifth resistor R5 and the first end of the sixth resistor R6 is connected with the non-inverting input end of a comparator U1.

The first voltage division circuit divides the feedback signal output by the second end of the resonant circuit and outputs the divided feedback signal to the inverting input end of the comparator U1, and the second voltage division circuit divides the voltage of the positive electrode of the power supply and outputs the divided feedback signal to the non-inverting input end of the comparator U1, so that the comparator U1 can output a corresponding level signal according to the change of the feedback signal output by the resonant circuit and control the on/off of the switching circuit.

This embodiment adopts comparator U1 to construct the comparison control circuit, need not use treater such as MCU or FPGA, is favorable to reduce cost, simplifies the circuit, reduces the volume of circuit, and then reduces the product that uses this circuit, for example the volume of electron cigarette, improves the portability of electron cigarette.

In one embodiment, the resonant driving circuit 30 further includes:

an enable circuit connected to the compare control circuit.

Taking the comparison control circuit as the high level enable for example, the enable circuit may include a pull-down resistor and a device capable of triggering the output enable signal, such as a key having one end connected to the power supply and the other end connected to the enable end of the comparison control circuit. Of course, if the comparison control circuit is enabled at a low level, the enable circuit may be changed accordingly.

It can be said that, when the resonant oscillation circuit is powered on, the pull-down resistor pulls down the level of the enable end of the comparison control circuit, so that the comparison control circuit cannot work, and at this time, the resonant oscillation circuit is in a steady state and cannot oscillate; when a user needs to generate the sound wave, the user can trigger the enabling signal, for example, press a key, so that the level of the enabling end of the comparison control circuit is pulled high, the comparison control circuit starts to work, and the whole sound wave generating circuit starts to work.

In this embodiment, by setting the enable circuit, a user can control the output level of the enable circuit to further control the resonant oscillation circuit to work or stop working, thereby improving the controllability of the resonant oscillation circuit.

In one embodiment, the switching circuit includes: an electronic switch Q1 and a second resistor R2;

the common end of the input end of the electronic switch Q1 is connected with a power supply, the output end of the electronic switch Q1 is grounded, and the controlled end of the electronic switch Q1 is connected with the output end of the comparator U1; the controlled end of the electronic switch Q1 is connected with the comparison control circuit; the first end of the second resistor R2 is connected with the controlled end of the electronic switch Q1, and the second end of the second resistor R2 is grounded.

The electronic switch Q1 may be one or a combination of a triode, a MOS transistor, and an IGBT, which is not limited herein. In this embodiment, the electronic switch Q1 triggered by the electronic switch Q1 being in high level is taken as an example, such as an NMOS transistor.

The second resistor R2 in this embodiment is used to pull down the controlled terminal of the electronic switch Q1, so as to ensure that the initial state of the electronic switch Q1 is the off state, and avoid abnormal operation of the resonant oscillating circuit caused by the failure to determine the state of the electronic switch Q1. When the electronic switch Q1 is triggered by a low level, the second resistor R2 is set as a pull-up resistor.

In one embodiment, the resonant driving circuit 30 further includes:

The booster circuit can promote the power supply and charge the charging voltage of the energy storage element, thereby improving the voltage of the energy storage element when discharging to the resonant circuit, and further improving the working voltage of the resonant circuit, namely, improving the voltage acting on the two ends of the resonant energy output device 10, and further better driving the resonant energy output device 10 to convert the resonant energy into sound waves.

Further, the booster circuit includes:

a second inductor L2 and a third capacitor C3;

the first end of the second inductor L2 is connected to the first end of the third capacitor C3, the second end of the second inductor L2 is connected to the second end of the third capacitor C3, a common end between the first end of the second inductor L2 and the first end of the third capacitor C3 is an input end of the voltage boost circuit, and a common end between the second end of the second inductor L2 and the second end of the third capacitor C3 is an output end of the voltage boost circuit.

In this embodiment, when the switch circuit is in the on state, the positive electrode of the power supply, the second inductor L2, the switch circuit, and the negative electrode of the power supply form a loop, and the second inductor L2 starts to store energy.

When the switch circuit is in a closed state, the voltage output by the positive electrode of the power supply is superposed with the reverse electromotive force generated by the second inductor L2 to charge the energy storage element. Further, the discharge voltage when the second capacitor C2 discharges can be increased, so that the amplitude of the ac signal input to the resonant circuit is increased, the driving voltage of the resonant energy output device 10 is further increased, and the resonant energy output device 10 can be better driven.

In addition, because the third capacitor C3 is designed to be connected in parallel with the second inductor L2, when the second inductor L2 discharges, the voltage across the third capacitor C3 cannot suddenly change, so that the rise of the output voltage of the second inductor L2 connected in parallel with the third capacitor C3 can be slowed down, the peak value of the output voltage of the second inductor L2 is reduced, and devices of the switch circuit are protected from being damaged.

In an embodiment, the resonant tank circuit further comprises a fourth capacitor C4 and a fifth capacitor C5;

a first end of the fourth capacitor C4 is connected with a power supply, and a second end of the fourth capacitor C4 is grounded; the first end of the fifth capacitor C5 is connected with a power supply, and the second end of the fifth capacitor C5 is grounded.

The fourth capacitor C4 and the fifth capacitor C5 can filter high-frequency noise generated when the power supply works, and the working stability of the sound wave resonance circuit is improved.

For better explanation, the principle of the present invention is described below with reference to the above embodiments: the present embodiment is illustrated by taking a capacitor as an example, and the energy storage element is labeled as a second capacitor C2.

At the beginning of the power-on of the resonant oscillating circuit, the voltage value of the divided output of the power supply voltage by the second voltage dividing circuit is higher than the voltage value of the divided output of the voltage at the two ends of the first resistor R1 by the first voltage dividing circuit. That is, the voltage at the non-inverting input terminal of the comparator U1 is higher than the voltage at the inverting input terminal, but since the enabling circuit does not enable the comparator U1, the electronic switch Q1 is in an off state due to the pull-down of the second resistor R2. At this time, the power supply charges the second capacitor C2, and the resonant tank circuit is in a steady state.

A user can trigger the comparator U1 to start working through the enabling circuit, the comparator U1 outputs high level to the electronic switch Q1, and the electronic switch Q1 is controlled to be turned on;

at this time, the second capacitor C2 starts to discharge, and the current flows through the electronic switch Q1, the first resistor R1, the second end of the piezoelectric ceramic piece D1, the first end of the piezoelectric ceramic piece D1 and the first inductor L1; the current of the first resistor R1 flows from the second end to the first end, the voltage of the first end of the first resistor R1 is negative, so that the voltage of the non-inverting input end of the comparator U1 is higher than that of the inverting input end, the comparator U1 continues to output a high-level signal, and the electronic switch Q1 continues to be turned on.

When the second capacitor C2 finishes discharging, the first inductor L1 generates a reverse electromotive force, at this time, a current flows through the first end of the piezoelectric ceramic piece D1, the second end of the piezoelectric ceramic piece D1 and the first resistor R1, at this time, the current flows from the first end of the first resistor R1 to the second end of the first resistor R1, at this time, the voltage at the upper end of the first resistor R1 is positive, so that the voltage at the non-inverting input end of the comparator U1 is lower than the voltage at the inverting input end, the comparator U1 outputs a low level signal, and the electronic switch Q1 is turned off; meanwhile, the positive electrode of the power supply charges the second capacitor C2 through the second inductor L2 and the third capacitor C3.

When the first inductor L1 finishes discharging, the electronic switch Q1 is turned on, and the second capacitor C2 starts discharging; the above process is repeated, the resonant oscillation circuit generates alternate oscillation, the resonant circuit is in a resonant oscillation state, the piezoelectric ceramic piece D1 in the resonant circuit also generates resonant oscillation, and the energy generated by the resonant circuit is converted into sound waves to be output.

The utility model discloses still provide an electron cigarette, the electron cigarette includes atomizing cavity and foretell resonant oscillation circuit. The specific structure of the resonant oscillation circuit refers to the above embodiments, and since the electronic cigarette adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here. Wherein, the electron cigarette still includes:

the nebulization chamber is filled with a solution, for example a solution with tobacco flavour. The atomizing cavity is connected with the piezoelectric ceramic piece D1 of the resonant oscillation circuit, and when the sound wave resonant circuit works, the piezoelectric ceramic piece D1 generates ultrasonic waves to atomize liquid in the atomizing cavity into a smoke shape for a user to use.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A resonant tank circuit, comprising:

a resonant energy output device;

2. The resonant tank circuit according to claim 1, wherein the resonant unit comprises:

3. The resonant tank circuit of claim 1, wherein the resonant drive circuit comprises:

a switching circuit;

the first end of the energy storage element is connected with the input end of the switch circuit, and the second end of the energy storage element is connected with the first end of the resonant circuit; the energy storage element is used for discharging when the switching circuit is switched on and charging when the switching circuit is switched off;

4. The resonant tank circuit of claim 3, wherein the comparison control circuit comprises:

the input end of the first voltage division circuit is connected with the second end of the resonance circuit, and the output end of the first voltage division circuit is connected with the inverting input end of the comparator; the input end of the second voltage division circuit is connected with a power supply, and the output end of the second voltage division circuit is connected with the non-inverting input end of the comparator; the comparator enabling circuit is connected with an enabling end of the comparator.

5. The resonant tank circuit of claim 3, wherein the resonant drive circuit further comprises:

an enable circuit connected to the compare control circuit.

6. The resonant tank circuit of claim 3, wherein the switching circuit comprises: an electronic switch and a second resistor;

the common end of the input end of the electronic switch is connected with a power supply, the output end of the electronic switch is grounded, and the controlled end of the electronic switch is connected with the output end of the comparison control circuit; the controlled end of the electronic switch is connected with the comparison control circuit; the first end of the second resistor is connected with the controlled end of the electronic switch, and the second end of the second resistor is grounded.

7. The resonant tank circuit of claim 3, wherein the resonant drive circuit further comprises:

8. The resonant tank circuit of claim 7, wherein the boost circuit comprises:

a second inductor and a third capacitor;

9. The resonant tank circuit according to any of claims 1 to 8, further comprising a fourth capacitance and a fifth capacitance;

10. An electronic cigarette, characterized in that it comprises an atomizing chamber and a resonant oscillating circuit according to any one of claims 1 to 9.