CN219460375U - Electronic cigarette circuit capable of realizing preheating function through temperature detection - Google Patents

Abstract

The utility model relates to an electronic cigarette circuit for realizing a preheating function through temperature detection, which comprises a control circuit, an input circuit, a temperature detection circuit, an induction circuit, a driving circuit and an indication circuit, wherein the control circuit is connected with the input circuit; the temperature detection circuit sends the monitored tobacco tar temperature to the control circuit, and the tobacco tar temperature is output as an indication signal through the indication circuit; the output end of the input circuit is connected with the control circuit; the output end of the sensing circuit is connected with the input end of the control circuit, and signals are transmitted to the control circuit after sensing that a user inhales; and the output end of the control circuit is connected with the driving circuit to heat and atomize the electronic cigarette tobacco tar. According to the utility model, heating is stopped by heating the tobacco tar to the preset temperature from the current temperature, and adverse effects of excessive preheating or burning of the tobacco tar caused by misoperation of a user are avoided in different states, so that not only is power consumption greatly saved, but also the actual use requirement of the user is greatly met, and good user experience is brought.

Description

Electronic cigarette circuit capable of realizing preheating function through temperature detection

Technical Field

The utility model relates to the technical field of electronic cigarettes, in particular to an electronic cigarette circuit capable of realizing a preheating function through temperature detection.

Background

At present, the types of tobacco tar of electronic cigarettes are various, the components and the viscosity degree are different, the speed of penetrating the viscous tobacco tar into an atomization core is low when the viscous tobacco tar is sucked, the viscous tobacco tar is easy to burn, and in order to meet the requirements of users for sucking different types of tobacco tar, the electronic cigarettes are required to have a preheating function, namely, the tobacco tar can be sucked after being preheated to an ideal temperature. The electronic cigarette with the preheating function in the market at present adopts a fixed preheating time mode, namely, no matter the actual environment where the electronic cigarette is positioned and the current tobacco tar temperature, when a preheating instruction arrives, the electronic cigarette is preheated according to the preset preheating time, and the preheating mode is rigid and causes great electric quantity waste, and more importantly, the electronic cigarette brings poor use experience to a user.

In the prior art, an electronic cigarette chip with a preheating function and an electronic cigarette disclosed in the patent with the publication number of CN214629905U are disclosed, and a user controls the electronic cigarette circuit with the preheating function through an input end. Because the monitoring of the tobacco tar temperature is not carried out and no indication signal is provided, the user does not know whether the current tobacco tar temperature needs to be preheated or not, the preheating time for realizing preheating through the input end is fixed, the actual environment temperature (such as in different seasons and indoor and outdoor) of the electronic cigarette is greatly different, and the preheating time is changed in the actual situation, so that the preheating mode is rigid and causes great electric quantity waste, and more importantly, the electronic cigarette brings bad use experience to the user.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides an electronic cigarette circuit for realizing a preheating function through temperature detection, which solves the defects in the prior art.

The aim of the utility model is achieved by the following technical scheme: an electronic cigarette circuit realizing a preheating function through temperature detection comprises a control circuit, an input circuit, a temperature detection circuit, an induction circuit, a driving circuit and an indication circuit; the output end of the temperature detection circuit is connected with the input end of the control circuit, the output end of the control circuit is connected with the input end of the indication circuit, the temperature detection circuit sends the monitored tobacco tar temperature to the control circuit, and the tobacco tar temperature is output as an indication signal through the indication circuit; the output end of the input circuit is connected with the control circuit to preheat the electronic cigarette; the output end of the sensing circuit is connected with the input end of the control circuit, and signals are transmitted to the control circuit after sensing that a user inhales; and the output end of the control circuit is connected with the driving circuit to heat and atomize the electronic cigarette tobacco tar.

The temperature detection circuit comprises a circuit module, resistors NTC and Rf and capacitors C1 and C2; the capacitor C1 is connected with the circuit module, one end of the capacitor C2 is connected with the control circuit, and the other end of the capacitor C2 is grounded; the resistor NTC and the resistor RF are connected in series, one end of the resistor NTC and the resistor RF after being connected in series are connected with the control circuit, and the other end of the resistor NTC and the resistor RF are grounded; the Vout port of the circuit module is connected with the control circuit, and the TH port of the circuit module is also connected with the resistors NTC and Rf.

The circuit module comprises a hysteresis comparator, a logic circuit, a bias voltage circuit and an oscillator and frequency divider; one input end of the hysteresis comparator is connected with the TH port, the other input end of the hysteresis comparator is connected with two resistors, one of the two resistors is connected with the VDD end, the other resistor is grounded, and the output end of the hysteresis comparator is connected with the logic circuit; the logic circuit is connected with the oscillator and the frequency divider and the Vout port; the bias voltage circuit is connected with the VDD terminal.

The resistor NTC is a thermistor and is arranged at the tobacco tar position, and the resistor Rf is a feedback resistor connected with the resistor NTC in series.

The power supply circuit is connected with the power supply ends of the control circuit, the input circuit, the induction circuit and the driving circuit, and provides reference voltages for the circuits.

The indicating circuit comprises an LED driving circuit and a group of LED indicating lamps used for displaying the state of the electronic cigarette, wherein the LED driving circuit is connected with the LED indicating lamps, and one LED indicating lamp is used for displaying that the electronic cigarette is in a preheating state or a preheating completion state.

The utility model has the following advantages: according to the electronic cigarette circuit capable of realizing the preheating function through temperature detection, heating is stopped by heating tobacco tar to a preset temperature from the current temperature, and adverse effects of excessive preheating or tobacco tar burning caused by misoperation of a user are avoided in different states, so that power consumption is greatly saved, actual use requirements of the user are greatly met, and good user experience is brought.

Drawings

FIG. 1 is a schematic diagram of the circuit principle of the present utility model;

FIG. 2 is a schematic diagram of a temperature detection circuit;

fig. 3 is a schematic diagram of the internal circuit of the circuit module.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, 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 apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Accordingly, the following detailed description of the embodiments of the present application, provided in connection with the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application. The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1, the utility model specifically relates to an electronic cigarette circuit for realizing a preheating function through temperature detection, which is characterized in that the temperature of tobacco tar is monitored through a temperature detection circuit, a monitoring result is output as an indication signal through an indication circuit, a user can realize the preheating function of the electronic cigarette through an input circuit according to the indication signal, and the tobacco tar automatically stops heating after being preheated to reach a preset temperature and updates the indication signal. At the moment, a user can smoke, the induction circuit senses air suction of the user and transmits signals to the control circuit, the control circuit controls the driving circuit to heat and atomize the electronic cigarette tobacco tar, and the indication circuit displays the working condition of the electronic cigarette.

The temperature sensor comprises an input circuit, a temperature detection circuit, a power supply circuit, a control circuit, an induction circuit, a driving circuit and an indication circuit. The control circuit is a control core of the electronic cigarette and realizes multiple functions of temperature detection control, smoking detection control, input control, preheating control and the like;

further, the input circuit is a user control signal generating circuit, a plurality of modes such as keys, touch sheets and the like can be adopted on the system for operation of a user, and the internal circuit converts external actions into one or more signals and provides the signals for the control circuit;

the power supply circuit comprises a filtering module, is designed for a band-gap reference voltage source, supplies power for a plurality of modules such as a control circuit, an input circuit, an induction circuit, a driving circuit and the like, and provides reference voltage. The sensing circuit converts the pumping action of a user into an internal signal and provides the internal signal to the control circuit, and the internal signal can be generally realized in various modes such as a capacitive microphone, a pressure sensing MEMS and the like; the driving circuit comprises a power tube driving circuit, a power tube and an atomizer. The indicating circuit comprises an LED driving circuit and a group of LED indicating lamps for displaying the state of the electronic cigarette, wherein the LED indicating lamps for displaying whether the electronic cigarette is in a state requiring preheating or a state completing preheating are needed.

As shown in fig. 2, the degree detection circuit should include a circuit module and passive devices such as resistors and capacitors. An NTC thermistor may be used to be placed near the tobacco tar, where the resistance is related to the tobacco tar temperature, rf is a feedback resistor connected in series with it, and the TH terminal voltage of the circuit module may be set to 0.833×vdd, the maximum value is 0.844×vdd, and the minimum value is 0.822×vdd. The set temperature Th of the tobacco tar at the time of detection can be calculated by the following formula:

wherein R is the resistance of the thermistor NTC at 25 ℃, and B is the B constant of the NTC resistor. By the above formula, the set temperature Th may be calculated from the feedback resistance Rf value, or the feedback resistance Rf to be used may be calculated from the set temperature Th.

As shown in fig. 3, the circuit module includes a resistor voltage divider, a hysteresis comparator, a Bias voltage Bias, an oscillator and frequency divider OSC & DIV, a logic circuit, and other circuits, and as shown in fig. 3, the upper threshold voltage of the hysteresis comparator is a Th terminal voltage threshold corresponding to the set temperature Th, and the lower threshold voltage is a Th terminal voltage threshold corresponding to the set temperature Tl.

Further, the circuit module should have a hysteresis function, when the TH terminal voltage exceeds the threshold voltage corresponding to the set temperature and remains for tvth time, the temperature detecting circuit 2 will determine that the temperature exceeds the set threshold, the output terminal Vout will be pulled down to output the signal to the control circuit 4, and when the TH terminal voltage exceeds the set threshold voltage but is smaller than the holding time tvth, the output Vout is regarded as disturbance and is unchanged.

The working process of the utility model is as follows: the temperature detection circuit monitors the tobacco tar temperature in real time, when the tobacco tar temperature is lower than the set value Th, a signal is provided for the control circuit, the control circuit displays that the electronic cigarette is in a state of needing preheating through the indication circuit, and a user cannot suck normally. At this time, a user can send a preheating signal to the control circuit through the input circuit, and the control circuit controls the driving circuit to start preheating in a low-power output mode. When the tobacco tar temperature rises to the set temperature, the temperature detection circuit outputs a signal to the control circuit, the control circuit automatically stops preheating, the indication circuit displays that the electronic cigarette is in a preheating completion state, a user cannot continue preheating through the input circuit, at the moment, the user can suck normally, the induction circuit senses the air sucked by the user and then transmits the signal to the control circuit, and the control circuit controls the drive circuit to heat and atomize the electronic cigarette tobacco tar; when the tobacco tar temperature is reduced after a period of time, the temperature detection circuit detects that the tobacco tar temperature is lower than the set value Tl, a signal is provided for the control circuit, the control circuit displays that the electronic cigarette is in a state of needing preheating through the indication circuit again, the normal suction function is closed, and a user can perform preheating operation again.

According to the utility model, the working condition of the electronic cigarette is provided for a user through the temperature detection of the tobacco tar and the indication circuit, the user can realize the preheating function according to the condition, the heating of the tobacco tar is automatically stopped after the tobacco tar is preheated to reach the preset temperature Th, the indication circuit displays that the electronic cigarette is in a preheating completion state, the user can suck and the preheating function is forbidden; when the detected tobacco tar temperature is lower than the set value Tl, the indication circuit displays a preheating state, and a user can preheat and inhibit suction to prevent the tobacco tar from burning. According to the design, the heating of the tobacco tar is stopped when the tobacco tar is heated to the preset temperature from the current temperature, and adverse effects of excessive preheating or burning of the tobacco tar caused by misoperation of a user are avoided in different states, so that the power consumption is greatly saved, the actual use requirement of the user is greatly met, and good user experience is brought.

The foregoing is merely a preferred embodiment of the utility model, and it is to be understood that the utility model is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Claims (6)

1. An electronic cigarette circuit realizing a preheating function through temperature detection is characterized in that: the temperature sensor comprises a control circuit, an input circuit, a temperature detection circuit, an induction circuit, a driving circuit and an indication circuit; the output end of the temperature detection circuit is connected with the input end of the control circuit, the output end of the control circuit is connected with the input end of the indication circuit, the temperature detection circuit sends the monitored tobacco tar temperature to the control circuit, and the tobacco tar temperature is output as an indication signal through the indication circuit; the output end of the input circuit is connected with the control circuit to preheat the electronic cigarette; the output end of the sensing circuit is connected with the input end of the control circuit, and signals are transmitted to the control circuit after sensing that a user inhales; and the output end of the control circuit is connected with the driving circuit to heat and atomize the electronic cigarette tobacco tar.

2. The electronic cigarette circuit for realizing the preheating function through temperature detection according to claim 1, wherein: the temperature detection circuit comprises a circuit module, resistors NTC and Rf and capacitors C1 and C2; the capacitor C1 is connected with the circuit module, one end of the capacitor C2 is connected with the control circuit, and the other end of the capacitor C2 is grounded; the resistor NTC and the resistor RF are connected in series, one end of the resistor NTC and the resistor RF after being connected in series are connected with the control circuit, and the other end of the resistor NTC and the resistor RF are grounded; the Vout port of the circuit module is connected with the control circuit, and the TH port of the circuit module is also connected with the resistors NTC and Rf.

3. An electronic cigarette circuit for realizing a preheating function by temperature detection according to claim 2, wherein: the circuit module comprises a hysteresis comparator, a logic circuit, a bias voltage circuit and an oscillator and frequency divider; one input end of the hysteresis comparator is connected with the TH port, the other input end of the hysteresis comparator is connected with two resistors, one of the two resistors is connected with the VDD end, the other resistor is grounded, and the output end of the hysteresis comparator is connected with the logic circuit; the logic circuit is connected with the oscillator and the frequency divider and the Vout port; the bias voltage circuit is connected with the VDD terminal.

4. An electronic cigarette circuit for realizing a preheating function by temperature detection according to claim 2, wherein: the resistor NTC is a thermistor and is arranged at the tobacco tar position, and the resistor Rf is a feedback resistor connected with the resistor NTC in series.

5. An electronic cigarette circuit for realizing a preheating function by temperature detection according to any one of claims 1-4, wherein: the power supply circuit is connected with the power supply ends of the control circuit, the input circuit, the induction circuit and the driving circuit, and provides reference voltages for the circuits.

6. The electronic cigarette circuit for realizing the preheating function through temperature detection according to claim 5, wherein: the indicating circuit comprises an LED driving circuit and a group of LED indicating lamps used for displaying the state of the electronic cigarette, wherein the LED driving circuit is connected with the LED indicating lamps, and one LED indicating lamp is used for displaying that the electronic cigarette is in a preheating state or a preheating completion state.