WO2017024477A1

WO2017024477A1 - Method for detecting whether cigarette oil in electronic cigarette is exhausted and electronic cigarette

Info

Publication number: WO2017024477A1
Application number: PCT/CN2015/086547
Authority: WO
Inventors: 刘秋明; 向智勇; 韦志林; 丁建军; 牛建华
Original assignee: 惠州市吉瑞科技有限公司深圳分公司
Priority date: 2015-08-10
Filing date: 2015-08-10
Publication date: 2017-02-16
Also published as: CN107072312A; CN107072312B

Abstract

A method for detecting whether cigarette oil in an electronic cigarette is exhausted and an electronic cigarette, which solve the technical problem in the prior art that cotton is burnt due to the fact that the electronic cigarette fails to allow a user to learn whether the cigarette oil is about to be exhausted and the user continues smoking when the cigarette oil is about to be exhausted. The method comprises steps: S1, when a smoking signal is detected, supplying power to heating wires (2, 31, 50), which are used for atomizing cigarette oil, in an electronic cigarette, so that the heating wires (2, 31, 50) operate; and S2, acquiring a temperature change speed of the heating wires (2, 31, 50), and when the change speed is greater than a pre-set value, determining that cigarette oil in the electronic cigarette is exhausted and stopping supplying power to the heating wires (2, 31, 50). Thus, when a user uses an electronic cigarette and cigarette oil is about to be exhausted, the electronic cigarette is controlled in time to stop operating, so as to avoid the occurrence of a cotton burning phenomenon, thereby improving the user experience.

Description

Description: A method for detecting the exhaustion of smoke oil in an electronic cigarette and an electronic cigarette

[0001] The present invention relates to the field of electronic cigarette technology, and in particular, to a method for detecting whether smoke oil in an electronic cigarette is exhausted and an electronic cigarette.

Background technique

[0002] Electronic cigarette is a relatively common artificial electronic cigarette product, mainly used for smoking cessation and replacement of cigarettes; the structure of electronic cigarette mainly includes battery components and atomizing components; when the smoker's smoking action is detected, the battery component is The atomizing component supplies power to make the atomizing component in the squirming state; when the atomizing component is turned on, the heating wire is heated, and the smoke oil is evaporated by heat to form an aerosol which simulates the smoke, so that the user has a kind of sucking Similar to the feeling of smoking.

[0003] The existing electronic cigarette has sufficient smoke oil in the early stage of smoking, so the smoke taste is pure, but the electronic cigarette uses an opaque oil storage chamber, and the user cannot see the remaining amount of the oil in the oil storage chamber, and the electron Smoke does not have the warning and warning function of the amount of smoke oil, which leads to the situation that after the smoking, the smoke oil becomes less or exhausted, and the smoking continues to cause the odor of burning cotton, which brings a very bad experience to the user.

[0004] That is to say, in the prior art, the electronic cigarette cannot let the user know whether the smoke oil is about to be exhausted, and continues to smoke after the smoke oil is about to be exhausted, thereby causing technical problems of burning cotton.

technical problem

[0005] The present invention is directed to the prior art, the electronic cigarette can not let the user know whether the smoke oil is about to be exhausted, and the smoking oil is about to run out, continue to smoke, resulting in technical problems of burning cotton, providing a detection electron Whether the smoke oil in the smoke is exhausted and an electronic cigarette realizes that the user uses the electronic cigarette, and the smoke oil is about to be exhausted, and the electronic cigarette is stopped to prevent the burning of the cotton, thereby improving the user's use. Experience.

Problem solution

Technical solution

[0006] In one aspect, the present invention provides a method for detecting whether smoke oil in an electronic cigarette is exhausted, including the following steps [0007] Sl, after detecting the smoking signal, supplying power to the heating wire for atomizing the smoke oil in the electronic cigarette, so that the heating wire works;

[0008] S2: acquiring a temperature change speed of the heating wire, and determining that the smoke oil is exhausted in the electronic cigarette after the change speed is greater than a preset value, and stopping power supply to the heating wire.

In another aspect, the present invention provides an electronic cigarette, comprising: a detection control circuit, a heating wire for atomizing the smoke oil, and a power supply circuit for supplying the detection control circuit and the heating wire;

[0010] the detection control circuit is configured to control the power supply circuit to supply power to the heating wire after detecting a smoking signal, to operate the heating wire, and obtain a temperature change speed of the heating wire, and The change speed is greater than a preset value 吋, determining that the smoke oil in the electronic cigarette is exhausted, and stopping power supply to the heating wire.

Advantageous effects of the invention

Beneficial effect

[0011] In the solution of the present invention, when the smoking signal is detected, the heating wire for atomizing the smoke oil in the electronic cigarette is supplied with power to operate the heating wire; Describe the temperature change rate of the heating wire, and after the change speed is greater than a preset value, determine that the smoke oil is exhausted in the electronic cigarette, and stop supplying power to the heating wire. That is to say, the specific heat capacity of the smoke oil is greater than the heat capacity of the heating wire (that is, when the smoke oil and the smoke oil absorb the heat generated by the heating wire), the temperature rise of the heating wire in the unit turn is faster than that without the smoke oil. Slowly, by detecting the temperature change rate of the heating wire, it is known whether the heating wire is in contact with the smoke oil, thereby judging whether the smoke oil in the electronic cigarette is exhausted, and stopping the supply of the heating wire after determining that the smoke oil is about to be exhausted; The invention solves the technical problem that the electronic cigarette in the prior art can not let the user know whether the smoke oil is about to be exhausted, and continues to smoke after the smoke oil is exhausted, thereby causing the technical problem of burning the cotton, realizing the use of the electronic cigarette by the user, and the smoke oil is about to be After exhausting 吋, and 吋 control the electronic cigarette to stop working, to avoid the occurrence of burning, thereby improving the user experience.

Brief description of the drawing

DRAWINGS

1 is a flow chart of a method for detecting whether smoke oil in an electronic cigarette is exhausted according to an embodiment of the present invention; [0013] FIG. 2 is a second method for detecting smoke oil in an electronic cigarette according to an embodiment of the present invention; [0014] FIG. 3 is a circuit structure for detecting the temperature of a heating wire by a thermocouple sensor according to an embodiment of the present invention; Schematic diagram

4 is a flowchart of a third method for detecting whether smoke oil is exhausted in an electronic cigarette according to an embodiment of the present invention; [0016] FIG. 5 is a diagram of detecting a voltage at an end of a heating wire according to an embodiment of the present invention; A block diagram of the internal structure of the electronic cigarette to detect the temperature change of the heating wire;

6 is a flowchart of a fourth method for detecting whether smoke oil is exhausted in an electronic cigarette according to an embodiment of the present invention; [0018] FIG. 7 is a block diagram of an internal circuit structure of an electronic cigarette according to an embodiment of the present invention; ;

8A is a block diagram showing an internal circuit structure of an electronic cigarette based on a temperature detecting sub-circuit for detecting a temperature change of a heating wire according to an embodiment of the present invention;

8B is a block diagram showing an internal circuit structure of an electronic cigarette based on a voltage detecting sub-circuit for detecting a temperature change of a heating wire according to an embodiment of the present invention;

[0021] FIG. 9 is a schematic diagram of a microprocessor and its peripheral circuits according to an embodiment of the present invention;

10 is a circuit schematic diagram of detecting a voltage of an end portion of a heating wire by a partial pressure according to an embodiment of the present invention; [0023] FIG. 11 is a schematic diagram of an internal circuit of an electronic cigarette according to an embodiment of the present invention; Schematic diagram of linear regulator circuit;

12 is a schematic diagram of a reset circuit used in an internal circuit of an electronic cigarette according to an embodiment of the present invention; [0025] FIG. 13 is a display diagram of an internal circuit of an electronic cigarette according to an embodiment of the present invention; Alarm circuit schematic diagram;

FIG. 14 is a schematic diagram of a trigger circuit used in an internal circuit of an electronic cigarette according to an embodiment of the present invention; FIG.

15A is a schematic diagram of a charging management sub-circuit of a power supply circuit used in an internal circuit of an electronic cigarette according to an embodiment of the present invention;

[0028] FIG. 15B is a schematic diagram of an external charging sub-circuit of a power supply circuit used in an internal circuit of an electronic cigarette according to an embodiment of the present invention;

16 is a schematic diagram of a battery voltage detecting circuit used in an internal circuit of an electronic cigarette according to an embodiment of the present invention;

FIG. 17 is a schematic diagram of a battery protection circuit used in an internal circuit of an electronic cigarette according to an embodiment of the present invention. Embodiments of the invention

[0031] Embodiments of the present invention provide a method for detecting whether smoke oil in an electronic cigarette is exhausted, and the method for solving the prior art that the electronic cigarette cannot let the user know whether the smoke oil is about to be exhausted, and the smoke oil is about to be exhausted.吋 Continue to smoke, and the technical problem of burning cotton has realized that the user can use the electronic cigarette, and the smoke oil is about to run out, and the electronic cigarette is controlled to stop working to avoid the phenomenon of burning cotton, thereby improving the user experience.

[0032] The technical solution of the embodiment of the present invention is to solve the above technical problem, and the general idea is as follows:

[0033] Embodiments of the present invention provide a method for detecting whether smoke oil in an electronic cigarette is exhausted, including the steps of: Sl, supplying a heating signal for atomizing the smoke oil in the electronic cigarette after detecting a smoking signal; In order to operate the heating wire; S2, obtaining a temperature change speed of the heating wire, and determining that the smoke oil is exhausted in the electronic cigarette when the changing speed is greater than a preset value, and stopping power supply to the heating wire .

[0034] It can be seen that, in the embodiment of the present invention, the specific heat capacity of the smoke oil is greater than the heat capacity of the heating wire (ie, when the smoke oil and the smoke oil absorb the heat generated by the heating wire), the heating wire is in the unit cell. The temperature rise rate is slower than that of no smoke oil. By detecting the temperature change rate of the heating wire, it is known whether the heating wire is in contact with the smoke oil, thereby judging whether the smoke oil in the electronic cigarette is exhausted, and determining that the smoke oil is about to be exhausted, Stop supplying power to the heating wire; effectively solve the problem that the prior art electronic cigarette can not let the user know whether the oil is about to be exhausted, and the smoking is continued, and the technical problem of burning the cotton is realized. The use of electronic cigarettes, and the smoke oil is about to run out, and the electronic cigarettes are controlled to stop working to avoid the phenomenon of burning, thereby improving the user experience.

[0035] In order to better understand the above technical solutions, the above technical solutions will be described in detail in conjunction with the drawings and specific embodiments. It should be understood that the specific features of the embodiments and embodiments of the present invention are the technical solutions of the present application. The detailed description, rather than the limitation of the technical solution of the present application, can be combined with each other in the embodiments of the present invention and the technical features in the embodiments without conflict.

[0036] Embodiment 1

Referring to FIG. 1, an embodiment of the present invention provides a method for detecting whether smoke oil in an electronic cigarette is exhausted, including the following steps:

[0038] Sl, after detecting the smoking signal, supplying power to the heating wire for atomizing the smoke oil in the electronic cigarette, so that the heating wire works;

[0039] S2, obtaining a temperature change speed of the heating wire, and determining that the change speed is greater than a preset value 吋 The smoke oil in the electronic cigarette is exhausted, and power supply to the heating wire is stopped.

[0040] Specifically, the specific heat capacity of the heating wire is not adhered to the smoky oil 为, the specific heat capacity of the smoky oil is B (greater than A), and the specific heat capacity of the smoulder attached to the heating wire is C, wherein C It is greater than A and less than B; It can be known from the physical definition of specific heat capacity: The unit mass object changes the internal energy absorbed or released by the unit temperature ,, that is, the specific heat capacity of the substance can directly reflect the temperature change rate. In the present embodiment, by detecting the temperature change rate of the heating wire, the current specific heat capacity of the heating wire can be known by the temperature change rate, that is, whether the heating wire adheres to the smoke oil. In other words, by judging whether the temperature change rate of the heating wire is greater than a preset value, it is determined whether the current specific heat capacity of the heating wire is similar to the specific heat capacity of the heating wire without adhering the smoke oil, and the temperature change speed of the heating wire is greater than a preset value, that is, It is indicated that the current specific heat capacity of the heating wire is similar to the heat capacity (A) of the heating wire itself, which indicates that the amount of smoke oil adhered to the heating wire is not adhered or the amount of smoke oil adhered to it is small, and the smoke oil in the electronic cigarette can be determined to be exhausted and stopped. Powering the heating wire.

[0041] Further, in a specific implementation process, the temperature values of the initial engraving and ending engraving of a certain preset inter-segment segment may be obtained, and the heating filaments may be calculated by using the two temperature values and the preset inter-turn Referring to FIG. 2, the electronic cigarette is provided with an oil guiding member that is in contact with the heating wire and supplies oil to the heating wire, and the heating wire atomizes the oil on the oil guiding member to form Smoke, the step S2 specifically includes sub-steps

[0042] S21: acquiring a first temperature value of the heating wire in the first engraving;

[0043] S22, after the temperature of the heating wire rises to a preset second temperature value 吋, obtaining a time required for the heating wire temperature to rise from the first temperature value to the second temperature value, wherein The second temperature value is less than or equal to a temperature value of the oil enthalpy of the oil guiding member;

[0044] S23. Calculate a temperature change speed of the heating wire based on the first temperature value, the second temperature value, and the turn, and determine that the change speed is greater than the preset value. The smoke oil in the electronic cigarette is exhausted to stop supplying power to the heating wire.

[0045] It should be noted here that, in the above step S22, the temperature of the oil guiding member cracking crucible is the maximum temperature that the oil guiding member can withstand, and in specific applications, the oil guiding member can be heated to the beginning of discoloration. The temperature of the crucible is set to an upper limit of the second temperature value, and the temperature of the initial discoloration crucible may be different depending on the material of the oil guiding member, and is not specifically limited herein.

[0046] In a specific implementation process, the temperature of the heating wire may be detected by a temperature sensor, the temperature sensing The device is a thermocouple temperature sensor, and the thermocouple temperature sensor is connected to an end of the heating wire. As shown in FIG. 3, the thermocouple temperature sensor includes: a first end line 3 2 and a second end line 33 connected to an end portion 311 of the heating wire 31; wherein the first end line 32 and the second end line 33 adopt two Different kinds of wire (including alloy wire and non-alloy wire), such as copper, iron or constantan. In Fig. 3, the other end portion 312 of the heating wire 31 opposite to the end portion 31 1 is connected to one end of the electron beam 34 (which is a general material wire); the other end of the electron beam 34 is connected to the positive electrode of the battery, and the second end line The other end of the 33 is connected to the ground for forming a power supply circuit of the heating wire 31; the end of the first end wire 32 and the second end wire 33 remote from the heating wire 31 is connected to the signal amplifier 35 for constituting the temperature detection of the heating wire 31. Loop. On the one hand, after the smoking signal is obtained, the microprocessor 36 of the electronic cigarette controls the power supply circuit of the heating wire 31 to be turned on, and the heating wire 31 is energized and heated, at the first end line 32 (such as nickel-chromium material) and the second end line 33. (such as constantan material) The temperature difference is formed at both ends. According to the thermocouple temperature measurement principle, the electromotive force signal is outputted at the cold end of the high-resistance alloy wire and the low-resistance wire; on the other hand, the signal input end of the signal amplifier 35 is first The cold end of the end line 32 and the second end line 33 are connected to obtain the electromotive force signal, and is amplified, and further the amplified electromotive force signal is sent to the microprocessor 36 of the electronic cigarette for processing to obtain the heating wire. The current temperature value of 31.

[0047] In a specific implementation process, the temperature change rate of the heating wire can be obtained by detecting the magnitude of the resistance change of the heating wire, that is, the step S2 is specifically: obtaining the voltage value of the voltage detecting point in the circuit loop where the heating wire is located. Calculating, according to the voltage value, a magnitude of resistance change of the heating wire in a preset turn, and acquiring a temperature change speed of the heating wire based on the change amplitude, and after the change speed is greater than a preset value, Determining the exhaustion of the smoke oil in the electronic cigarette and stopping supplying power to the heating wire; wherein the resistance of the heating wire changes with temperature. The voltage detection point may be the end of the heating wire.

[0048] Specifically, in the present solution, by detecting the voltage value of the heating wire in the preset turn (ie, the unit turn), the resistance change amplitude of the heating wire is obtained, so that the temperature change speed of the heating wire can be known. Then, the current specific heat capacity of the heating wire can be known by the temperature change speed; determining whether the heating wire resistance change speed is greater than a preset value, that is, determining whether the current specific heat capacity of the heating wire is similar to the specific heat capacity of the heating wire without adhering the smoke oil ,, in the resistance The change speed is greater than the preset value 吋, which means that the current specific heat capacity of the heating wire is close to the heat capacity of the heating wire itself, and thus the amount of smoke oil adhered to the heating wire is not adhered or the amount of the smoked oil is small, and the electronic cigarette can be determined. The smoke oil is exhausted and the power supply to the heating wire is stopped. [0049] Please refer to FIG. 4, the step S2 specifically includes sub-steps:

[0050] S24: acquiring a first voltage value of the end of the heating wire in a first engraving, and acquiring a second voltage value of an end of the heating wire in a second engraving, wherein the second engraving and The first engraving is different from the preset time;

[0051] S25. Calculate, according to the first voltage value and the second voltage value, a magnitude of resistance change of the resistance of the heating wire within the predetermined turn, and acquire the heating wire based on the variation range. The temperature change rate, and after the change speed is greater than a preset value, determining that the smoke oil is exhausted in the electronic cigarette to stop supplying power to the heating wire.

[0052] Specifically, in the process of the heating wire working, the electric resistance of the heating wire is constantly changing with the accumulation of the heating enthalpy, and the power calculation formula P=U 2/R is known: the heating power of the heating wire (P)—The voltage (U) at the end of the heating wire rises as the heating wire resistance (R) rises or decreases as the heating wire resistance (R) decreases. That is to say, the change of the end voltage (U) of the heating wire can reflect the change of the heating wire resistance (R), and the initial engraving (ie, the first engraving) and the end 所述 between the preset turns are respectively obtained. The voltage value of the engraved (ie, the second engraving), and based on the two voltage values (ie, the first voltage value and the second voltage value), the resistance of the heating wire in the first engraving (Rtl) and the second engraving are determined. a resistance (Rt2), further determining a resistance change of the heating wire between the predetermined turns (0: IRtl-Rt2l/t, further, knowing a temperature change speed of the heating wire by IRtl-Rt2l/t, and The temperature change speed is greater than the preset value 吋, indicating that the current specific heat capacity of the heating wire is close to the heat capacity of the heating wire itself, thereby indicating that there is no sticking of smoke oil or a small amount of adhered smoke oil on the heating wire, and the electronic cigarette can be determined. The smog is exhausted, and the heating of the heating wire is stopped. The predetermined value is not specifically limited herein depending on the specific heat capacity of the heating wire.

[0053] In a specific implementation process, the voltage of the end of the heating wire obtained by the measurement may be large, in order to obtain a smaller voltage value, and reflect the larger voltage at the end of the hot wire by the smaller voltage value. In order to reduce the difficulty of voltage measurement, please refer to FIG. 5, a voltage dividing resistor 51 (for voltage division) may be connected in series in the power supply circuit of the heating wire 50, and the end of the heating wire 50 is obtained in the step S2. The voltage value is specifically obtained by: obtaining a voltage dividing value across the voltage dividing resistor 51, and acquiring a voltage value of an end portion of the heating wire 50 based on a power supply voltage of the power supply circuit and the partial voltage value. Specifically, referring to FIG. 5, the electronic cigarette is provided with a microprocessor 52 and a first switch member 53 and a second switch member 54 electrically connected to the microprocessor 52 and the heating wire 50. The microprocessor 52, the first switch member 53 and the heating wire 50 are connected to the two ends of the electronic cigarette battery to form a first loop, the microprocessor 52, the second switch member 54, The voltage dividing resistor 51 and the heating wire 50 are connected to the two ends of the electronic cigarette battery to form a second loop; when the microprocessor 52 controls the first closing member 53 to start, control the second The closing member 54 is closed to operate the heating wire 50. When the microprocessor 52 controls the second closing member 54 to open, the first closing member 53 is controlled to be closed to obtain The voltage value at the end of the heating wire 50 is described.

[0054] In a specific implementation process, in order to remind the user when it is determined that the electronic cigarette smoke is about to be exhausted, please refer to FIG. 6. After step S2, the method further includes the steps of:

[0055] S3. Output alarm information to remind the user that the smoke oil is exhausted; wherein the alarm information includes at least one of text information, voice information, vibration information, and light information. Correspondingly, a display module for displaying text information, an audio module for broadcasting voice information, a vibration module for emitting vibration information, or an LED lamp for emitting light information may be set in the electronic cigarette, wherein the light information may be Light information with different brightness or different light information.

[0056] In summary, by implementing the above technical solution of the present application, after the user smokes, and the smoke oil is about to be exhausted, the electronic cigarette can be controlled to stop working to avoid the phenomenon of burning, and the user can also remind the user that the smoke is exhausted. , thereby improving the user experience.

[0057] Embodiment 2

[0058] Based on the same inventive concept, referring to FIG. 7, the present invention further provides an electronic cigarette, comprising: a detection control circuit 1, a heating wire 2 for atomizing smoke oil, and a detection control circuit 1 and The heating circuit 2 is powered by the power supply circuit 3;

[0059] the detection control circuit 1 is configured to control the power supply circuit 3 to supply power to the heating wire 2 after detecting a smoking signal, to operate the heating wire 2, and obtain a temperature change of the heating wire The speed, and after the change speed is greater than a preset value, determines that the smoke in the electronic cigarette is exhausted, and stops supplying power to the heating wire.

[0060] In a specific implementation process, referring to FIG. 8A, the detection control circuit 1 includes: a microprocessor 10 and a temperature detecting sub-circuit 11 connected to the microprocessor 10; After detecting the smoking signal, controlling the power supply circuit 3 to supply power to the heating wire 2 to operate the heating wire 2; the temperature detecting sub-circuit 11 is configured to obtain the operation after the heating wire 2 is operated The temperature of the heating wire 2; The processor 10 is further configured to calculate a temperature change speed of the heating wire 2 based on the temperature, and determine that the smoke oil is exhausted in the electronic cigarette after the change speed is greater than a preset value, and control the power supply circuit 3 Stop supplying power to the heating wire 2. The temperature detecting sub-circuit 11 can detect the temperature of the heating wire 2 by using a temperature sensor, the temperature sensor is a thermocouple temperature sensor, and the thermocouple temperature sensor is connected to the end of the heating wire, as shown in FIG. Show, here is no longer a detailed description.

[0061] In a specific implementation, please refer to FIG. 8B, the detection control circuit 1 includes: a microprocessor 10 and a voltage detection sub-circuit 12 connected to the microprocessor 10;

[0062] The microprocessor 10 is configured to control the power supply circuit 3 to supply power to the heating wire 2 to detect the smoking signal, so that the heating wire 2 operates;

[0063] The voltage detecting sub-circuit 12 is configured to obtain a voltage value of a voltage detecting point (such as a heating wire end) in a circuit loop where the heating wire 2 is located after the heating wire 2 is operated;

[0064] The microprocessor 10 is further configured to calculate a resistance change amplitude of the heating wire 2 in a preset turn based on the voltage value, and acquire a temperature change speed of the heating wire 2 based on the change amplitude. And determining that the smoke oil is exhausted in the electronic cigarette after the change speed is greater than a preset value, and controlling the power supply circuit 3 to stop supplying power to the heating wire 2; wherein the resistance of the heating wire 2 is related to temperature The change has changed.

[0065] Further, referring to FIG. 8B, in the voltage detection point being the heating wire end, the voltage detecting sub-circuit 12 includes:

[0066] a voltage dividing module 121 connected to the microprocessor 10 and the end of the heating wire 2 for converting the voltage value into a readable voltage, so that the microprocessor 10 is based on the Calculating a magnitude of a resistance change of the heating wire 2 in a predetermined turn, and obtaining a temperature change speed of the heating wire 2 based on the change width, and determining that the change speed is greater than a preset value The smoke oil is exhausted in the electronic cigarette to stop supplying power to the heating wire 2; wherein the readable voltage is a voltage that the microprocessor 10 can recognize.

[0067] Further, still referring to FIG. 8B, the detection control circuit 1 further includes: a first switch 13 connected to the microprocessor 10; the microprocessor 10 is configured to control the first switch The closing member 13 is turned on or off to control the power supply circuit 3 to supply power to the heating wire 2 or to stop supplying power;

The voltage detecting sub-circuit 12 further includes: a second switch member 122 connected to the microprocessor 10; the microprocessor 10 is configured to control the second switch member 122 to be turned on or off. That is, the voltage detecting sub-circuit 12 is controlled to detect the voltage value or stop detecting the voltage value. [0069] In a specific implementation process, the first switch member 13 and the second switch member 122 are both field effect transistors; the drain of the first switch member 13 is connected to the heating wire 2 The source of the first switch member 13 is grounded, and the microprocessor 10 is connected to the gate of the first switch member 13 for controlling the first switch member 13 to be turned on or off.幵, controlling the power supply circuit 3 to supply power to the heating wire 2 or stopping the power supply; the voltage dividing module 121 includes a first resistor, a second resistor, and a first capacitor, and one end of the first resistor and the heat is generated The wire 2 is connected, the other end of the first resistor is connected to the second resistor, the first capacitor and the microprocessor, and the second resistor is connected to the other end of the first capacitor and grounded; a drain of the second switch member 122 is connected to the heating wire 2 and the first resistor, a source of the second switch member 122 is grounded, and the microprocessor 10 and the second switch a gate connection of the closing member 122 for controlling the second switching member 122 to be turned on or off to control the voltage dividing module 121 to acquire and The voltage value is converted into readable voltage or stopping the voltage value.

[0070] Taking a specific internal circuit of an electronic cigarette as an example, please refer to FIG. 9 and FIG. 10. The microprocessor 10 in FIG. 8B corresponds to the single chip STM32F030K6 in FIG. 9, the heating wire 2 in FIG. 8B, and the first switching element. 13 and the second shutoff member 122 correspond to the heating wire L, the field effect transistor and the Q2 in FIG. 10, respectively; the letters on the terminals in FIGS. 9 and 10 indicate the transmitted signal identification, and the plurality of signals marked with the same signal. The terminal is in a connection relationship. In addition, other specific circuit diagrams in this embodiment also follow this rule. Referring to Fig. 9 and Fig. 10, the heating wire L (generally about 0.3 ohms) 0+ is connected to the battery positive electrode B+, and the 0-terminal of the heating wire L is connected to the drain of the field effect transistor Q1, and the source of the field effect transistor Q1 Grounding, the PB0 end of the No. 14 pin of the STM32F030K6 is connected to the gate of the FET Q1, and is used to transmit the PWM wave signal labeled DRIV to control the Q1 to be turned on or off, thereby controlling the power supply loop of the heating wire L to be turned on. Or broken.

[0071] Further, the first resistor, the second resistor, and the first capacitor of the voltage dividing module 121 in FIG. 8B respectively correspond to the resistor R38, the resistor R39, and the capacitor C22 in FIG. One end of the resistor R38 is connected to the 0-end of the heating wire L, and the other end of the resistor R38 is connected to the resistor R39, the capacitor C22, and the No. 8 pin PA2 end of the single chip STM32F030K6, and the other end of the resistor R39 and the capacitor C22 is connected and grounded. The drain of the FET Q2 is connected to the 0-end of the heating wire L and the resistor R38, and the source of the FET Q2 is grounded. The PB1 end of the pin 15 of the STM32F030K6 is connected to the gate of the FET Q2, The control field effect transistor Q2 is turned on or off, to control the voltage dividing module composed of the resistors R38, R39 and the capacitor C22 to obtain the voltage value of the 0-end of the heating wire, and convert the voltage value into the readable voltage of the single chip STM32F030K6 or stop. Obtain the voltage value. This It is because the voltage value that can be recognized according to the type of the microprocessor may be limited. For example, in the specific implementation circuit shown in FIG. 9 and FIG. 10, the single chip STM32F030K6 can read the voltage value lower than 3V, but the electronic cigarette battery The supply voltage to the heating wire L is usually about 4.2V, that is, in the case of normal battery power, the 0-terminal voltage value of the heating wire L is 3V or more. In this solution, the voltage dividing module is set to enable micro processing. The device can read a voltage value lower than 3V through the voltage dividing module, and indirectly read the voltage value of the 0-end of the heating wire through the lower voltage value.

[0072] It should be noted that the drain of the FET Q1 is directly connected to the 0-end of the heating wire L, and the drain of the FET Q2 is passed through the resistor R41 and the heating wire L having a certain resistance (for example, 3 ohms). The 0-terminal connection, when Q1 and Q2 are turned on, the current output from the 0-end of the heating wire L flows directly from Q1 to the ground, and the 吋Q 2 branch does not function. Therefore, in this scheme, the control logic for Q1 and Q2 is: When the single-chip microcomputer ST M32F030K6 controls the FET Q1幵, the control FET Q2 is turned off to make the heating wire L work; when the single chip STM32F030K6 controls the field effect When the tube Q2 is turned on, the control field effect transistor Q1 is turned off to obtain the voltage value of the end portion of the heating wire L. Road finder r

[0073] In a specific implementation, still referring to FIG. 8B, the electronic cigarette further includes: a linear regulator circuit 4 connected to the power supply circuit 3 and the microprocessor 10, for adjusting the power supply circuit The operating voltage supplied to the microprocessor 10 is such that the regulated operating voltage is stabilized at the nominal operating voltage of the microprocessor 10. Specifically, as shown in FIG. 11, it is a schematic diagram of a linear voltage regulator circuit used in an internal circuit of an electronic cigarette. Referring to FIG. 9 and FIG. 11, the rated operating voltage of the single chip STM32F030K6 in FIG. 9 is 3V, in FIG. The positive voltage of the battery is input to the voltage regulator TLV70430 through the voltage regulator D5 to adjust the voltage of the electronic cigarette battery output greater than 3V, and output a stable 3V VDD voltage to the microprocessor (ie, the single chip STM32F030K6 shown in FIG. 9) The #1 pin of the VDD terminal) provides the microprocessor with an operating voltage that allows it to operate normally.

[0074] In a specific implementation, still referring to FIG. 8B, the electronic cigarette further includes: a reset circuit 5 connected to the microprocessor 10, configured to detect an internal working voltage of the microprocessor 10, and A reset signal is output to the microprocessor 10 after the internal operating voltage is lower than the first predetermined voltage. Specifically, as shown in FIG. 12, it is a schematic diagram of a reset circuit used in an internal circuit of an electronic cigarette. Referring to FIG. 9 and FIG. 12, the input terminal Vin of the reset circuit is connected to the VDD terminal of the No. 1 pin of the single chip STM32F030K6. The output terminal Vo u _t is connected with the NRST terminal of the 4th pin of the single chip STM32F030K6, and the reset circuit detects and obtains the single chip S The VDD voltage of the TM32F030K6, and after the VDD voltage is lower than 2.2V, a reset signal (such as a low level signal) is sent to the NRST terminal of the STM32F030K6, which resets the microprocessor to prevent the microprocessor from running out of control.

[0075] In a specific implementation, still referring to FIG. 8B, the electronic cigarette further includes: an alarm circuit 6 connected to the microprocessor 10; the microprocessor 10 is configured to determine the electronic cigarette When the smoke oil is exhausted, the alarm data is output to the alarm circuit 6; the alarm circuit 6 is configured to output an alarm message based on the alarm data to remind the user that the smoke oil is exhausted; wherein the alarm information includes text information and voice At least one of information, vibration information and lighting information. Correspondingly, a display module for displaying text information, an audio module for broadcasting voice information, a vibration module for emitting vibration information, or an LED lamp for emitting light information may be set in the electronic cigarette, wherein the light information may be Light information with different brightness or different light information.

[0076] In a specific embodiment, the alarm circuit 6 is for displaying output alarm information, and the alarm circuit 6 includes: a display screen connected to the microprocessor 10, and the microprocessor 10 a wake-up sub-circuit connected to the display screen; the microprocessor 10 is configured to output a wake-up trigger signal to the wake-up sub-circuit after determining that the smoke is exhausted in the electronic cigarette, and output the same to the display screen And displaying the output alarm data; the wake-up sub-circuit is configured to wake up the display screen after receiving the wake-up trigger signal; the display screen displays an output based on the alarm data after the wake-up to remind the user that the smoke oil is exhausted Text information. Specifically, as shown in FIG. 13 , it is a schematic diagram of a display alarm circuit used in an internal circuit of an electronic cigarette. Referring to FIG. 9 and FIG. 13 , the alarm circuit includes a 96×16 dot matrix organic electro-laser display OLED and is connected thereto. The wake-up sub-circuit includes a PNP type transistor Q3, an NPN type transistor Q4, and a P-channel field effect transistor Q5. The base of the transistor Q3 is connected to the 21st pin PA11 of the single chip STM32F030K6, and the emitter and the input VDD voltage are connected. The collector is connected to the 8th pin of the display, the base of the transistor Q4 is connected to the collector of the tertiary tube Q3, the emitter is grounded, the collector is connected to the positive voltage terminal B+ of the battery, and the gate of the FET Q5 is passed. The resistor R51 is connected to the positive voltage terminal B+ of the battery, the source is directly connected to the positive voltage terminal B+ of the battery, and the drain is connected to the 5th pin VBAT (operating voltage input terminal) of the display screen.

[0077] The working principle of the display alarm circuit is as follows: In the case that the electronic cigarette smoke is sufficient, the single chip STM32F0 30K6 outputs a high level signal to the base of the third stage tube Q3 through the PA11 end of the 21st pin, so that the triode Q3 , Q4 and FET Q5 are all off, the display is powered off; when the microprocessor determines that the electronic cigarette smoke is about to After exhaustion, the wake-up trigger signal (such as a low-level signal) is output to the base of the third-stage tube Q3 through the PA11 end of the 21st pin, and the triode Q3 is turned on, so that the transistor Q4 and the field effect transistor Q5 are sequentially turned on. And power on the display. That is, when there is a need to power on the display, there is no need to power off the display to achieve power saving. In addition, please refer to Figure 9 and Figure 13, the SCL end of the 10th pin and the SDA end of the 11th pin of the display are respectively connected with the PA9 end of the 19th pin of the STM32F030K6 and the PA10 end of the 20th pin, that is, The single chip STM32F030K6 writes the alarm data for displaying the output to the display through the PA9 end of the 19th pin and the PA10 end of the 20th pin, so that the display screen displays the output based on the alarm data after waking up to remind the user of the fuel consumption. Text information.

[0078] In a specific implementation, still referring to FIG. 8B, the power supply circuit 3 has a function module for charging an external device, and the electronic cigarette further includes a switch trigger circuit 7 connected to the microprocessor 10, The first trigger switch 71 is configured to output a first trigger signal indicating that the smoking action is detected to the microprocessor 10 after receiving the triggering action, so that the microprocessor 10 is based on the first The trigger signal controls the power supply circuit 3 to supply power to the heating wire 2; the second trigger switch 72 is configured to output a second trigger signal indicating that the smoking power is increased to the microprocessor 10 after receiving the triggering action So that the microprocessor 10 controls the power supply circuit 3 to increase the output power to the heating wire 2 based on the second trigger signal; and the third trigger switch 73 is configured to receive a triggering action, And outputting, to the microprocessor 10, a third trigger signal indicating that the smoking power is reduced, so that the microprocessor 10 controls the power supply circuit 3 to reduce the heating wire 2 based on the third trigger signal. Output power; a fourth trigger switch 74, configured to output, to the microprocessor 10, a fourth trigger signal indicating charging to an external device after receiving the triggering action, so that the microprocessor 10 is based on the The four trigger signals control the power supply circuit 3 to charge an external device

[0079] Specifically, please refer to FIG. 14, which is a schematic diagram of a trigger circuit used in an internal circuit of an electronic cigarette, a first trigger switch 71, a second trigger switch 72, and a third trigger in FIG. 8B. The Shaoguan 73 and the fourth trigger switch 74 respectively correspond to the switches (S1-S4) in FIG. 14, and the switches (S1-S4) in FIG. 14 are connected in parallel with each other, and respectively with the PB7 end of the 30th pin of the single chip STM32F030K6, The PB4 end of the 27th pin, the PB5 end of the 28th pin and the PB3 end of the 26th pin are connected, and the switching signals KEY, KE Y+, KEY- and KEY_0 are respectively transmitted to the single chip STM32F030K6. Wherein, when the switch SI receives the trigger action, outputting a level signal (such as a high level signal) indicating that the smoking action is detected to the single chip microcomputer STM32F030 K6, so that the microprocessor The power supply circuit for controlling the heating wire L is controlled based on the high level signal. When the triggering action is not received by the switch S1, the high level signal is not detected at the P30 terminal of the microprocessor No. 30 pin, and the broken heating wire is controlled. The power supply loop of L; when the switch S2 receives the trigger action, outputs a level signal (such as a high level signal) indicating that the smoking power is increased to the single chip STM32F030K6, so that the single chip STM32F030K6 is adjusted for control based on the high level signal. The duty ratio of the PWM wave that is turned on by the FET Q1 to increase the output power to the heating wire L. When the triggering action is not received by the S2, the high voltage of the microprocessor No. 27 pin PB4 is not detected. The signal is flat, and the duty ratio of the PWM wave for controlling the conduction of the FET Q1 is kept unchanged; when the triggering action is received by the S3, the STM32F030K6 outputs a level signal indicating that the smoking power is reduced (eg, low) Level signal), so that the single chip STM32F030K6 adjusts the duty ratio of the PWM wave for controlling the conduction of the field effect transistor Q1 based on the low level signal to reduce the output power to the heating wire L, when the switch S3 is not received To trigger吋, the low-level signal is not detected at the PB5 end of the No. 28 pin of the STM32F030K6, and the duty ratio of the PWM wave used to control the conduction of the FET Q1 is unchanged; when the S4 receives the trigger action, Outputting a level signal (such as a high level signal) indicating charging to an external device to the single chip STM32F030K6, so that the single chip microcomputer STM32F030K6 controls the power supply circuit of the electronic cigarette to charge the external device based on the high level signal, and does not receive the trigger when the S4 is not received. Action 吋, the high-level signal is not detected at the PB3 end of the 26th pin of the STM32F030K6, and the power supply circuit of the electronic cigarette is controlled to stop charging to the external device. In the specific implementation process, still refer to FIG. 8B, the power supply circuit 3 includes The internal charging interface 31, the charging management sub-circuit 32, the battery 33 and the external charging sub-circuit 34 are sequentially connected; the internal charging interface 31 is for connecting with an external power source, and acquiring electric energy; the charging management sub-circuit 32 Also connected to the microprocessor 10 for charging management of the battery 33 based on a battery charging management signal of the microprocessor 10; The external charging sub-circuit 34 is also coupled to the microprocessor 10 for charging an external device based on an external charging control signal of the microprocessor 10. Further, the external charging sub-circuit 34 includes: a third switching member connected to the microprocessor 10, and a fourth switching member connected to the third switching member and the battery 33, a fourth step is a boosting module connected to the battery 33, and an external charging interface connected to the boosting module 343 and configured to be connected to an external device; the third switching device is configured to acquire the external The charging control signal is turned on to turn on the fourth switching element, thereby causing the boosting module to communicate with the battery; the boosting module is configured to raise the battery voltage Pressing, and boosting the boosted voltage to the external device through the external charging interface.

Specifically, please refer to FIG. 15A and FIG. 15B, which is a schematic diagram of a power supply circuit used in an internal circuit of an electronic cigarette, and the circuit in FIG. 15A and the circuit in FIG. 15B are connected through a terminal Um. The P1 interface in FIG. 15A (corresponding to the internal charging interface 31 in FIG. 8B) is a USB interface for externally charging the electronic cigarette, and the P1 pin 1 is connected to the battery charging management chip AP5056, and the AP5056 is the 6th and 7th pins. It is respectively connected with the PF1 end of the No. 3 pin and the PF0 end of the No. 2 pin of the single chip in FIG. 9 , and is used for receiving the battery charging management signal sent by the single chip microcomputer, and charging and managing the battery. Specifically, when the battery needs to be charged, the MCU outputs a low-level signal to the No. 7 pin of the AP5056 through the PF0 terminal of the No. 2 pin, and the output to the No. 6 pin of the AP 5056 through the PF1 end of the No. 3 pin. Level signal, so that the electronic cigarette battery is in the state of charging; oppositely, when the battery is charged, the MCU outputs a high level signal to the No. 7 pin of the AP5056 through the PF0 end of the No. 2 pin, and passes through the No. 3 tube. The pin PF1 outputs a low level signal to the 6th pin of the AP5056, so that the electronic cigarette battery is in a state of being completed. 15B is a schematic diagram of an external charging sub-circuit of an electronic cigarette. The voltage signal outputted by the battery positive voltage output terminal B+ is filtered by the capacitors C19 and C20, and then input to the current mode boost converter MT3608. The main boost module performs boost processing to boost the battery voltage of the electronic cigarette (such as 4V) to the 5V voltage required for charging of a general electronic device (such as a mobile phone), and outputs it through a P2 interface (specifically, a USB interface). . Further, in order to realize the management of the external charging function of the electronic cigarette, as shown in FIG. 15B, the external charging sub-circuit includes: a field effect transistor Q6 connected in series with the power supply loop of the boost converter MT3608, and a base connected to the single chip STM32F030K6 and set A transistor Q7 whose electrode is connected to the gate of Q6. Referring to FIG. 9, FIG. 14 and FIG. 15B, when the switch S4 receives the trigger signal, the MCU outputs a high level signal to the base of the transistor Q7 through the PA7 terminal of the 13th pin, so that the transistor Q7 and the field effect transistor Q6 are both Turning on, the boost module is energized, and the external power is supplied through the P2 interface. Correspondingly, in order to realize the process of charging the electronic cigarette battery, the electronic cigarette battery is prohibited from supplying power to the external device. After charging the battery, the single chip STM32F030K6 outputs a low voltage to the base of the transistor Q7 through the PA7 end of the 13th pin. The signal is flat so that the transistor Q7 and the FET Q6 are both off, so that the MT3608 is inoperable.

[0082] In addition, please refer to FIG. 9 and FIG. 15A. The pin 2-4 of the PI interface is connected to the pins 4, 24, and 23 of the STM32F030K6 of the single chip microcomputer, and can be used to program the STM32F030K6.

[0083] In the specific implementation process, still referring to FIG. 8B, the electronic cigarette further includes: connecting with the power supply circuit 3 The battery voltage detecting circuit 8 is configured to detect the voltage of the battery in the power supply circuit 3, and control the power supply circuit 3 to stop supplying power to the heating wire 2 after the battery voltage is lower than the second preset voltage. Specifically, please refer to FIG. 16, a battery voltage detecting circuit composed of resistors R44, R45 and a capacitor C25. When the voltage of the battery is less than 3.3V, the control battery cannot supply power to the heating wire.

[0084] In a specific implementation, still referring to FIG. 8B, the electronic cigarette further includes: a battery protection circuit 9 connected to the two ends of the battery in the power supply circuit 3, configured to overcharge the battery Discharge or short circuit protection. Specifically, please refer to FIG. 17, the battery protection circuit includes a battery protection integrated chip MM3280 and a FET Q8, and the MM end of the MM3280 pin VDD is connected to the battery positive voltage output terminal B+, the sixth pin VSS terminal and the battery negative voltage. The output terminal B-connection is used to detect whether the battery is abnormal (such as overcharge, overdischarge or short circuit); the DO end of the MM3280 pin 1 is connected to the gate of the FET Q8, which is used to detect abnormality in the battery. The control field effect transistor Q8 is turned on to protect the battery.

[0085] In summary, the electronic cigarette in the solution of the present application smokes in the user, and the smoke oil is about to be exhausted, and the electronic cigarette can be controlled to stop working to avoid the phenomenon of burning cotton, and the user can also remind the user of the smoke. The oil is exhausted, thereby improving the user experience. In addition, the electronic cigarette has the functions of charging an external electronic device, managing and protecting the battery, and having various functions and stable performance, and has good practicability.

[0086] According to the above description, the electronic cigarette is used to implement the above method for detecting whether the smoke oil in the electronic cigarette is exhausted, and therefore, one or more embodiments of the electronic cigarette are the same as one or more embodiments of the above method. , I will not repeat them here.

[0087] Those skilled in the art will appreciate that embodiments of the invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Further, the present invention may take the form of a computer program product embodied in one or more of which comprises a computer usable storage medium having computer-usable program code (including but not limited to, disk storage, CD-R 0 _M, optical memory, etc.).

[0088] These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing, such that in a computer or other programmable device The instructions executed above provide steps for implementing the functions specified in one or more blocks of the flowchart or in a block or blocks of the flowchart.

[0089] Although a preferred embodiment of the present invention has been described, one of ordinary skill in the art will recognize the basic creation once Additional changes and modifications may be made to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications of the invention

Claims

Claim

[Claim 1] A method for detecting whether or not smoke oil in an electronic cigarette is exhausted, comprising the following steps

51. After detecting the smoking signal, supplying power to the heating wire for atomizing the smoke oil in the electronic cigarette, so that the heating wire works;

52. Obtain a temperature change speed of the heating wire, and after the change speed is greater than a preset value, determine that the smoke oil is exhausted in the electronic cigarette, and stop supplying power to the heating wire.

[Claim 2] The method for detecting whether or not smoke oil in an electronic cigarette is exhausted according to claim 1, wherein

The electronic cigarette is provided with an oil guiding member that is in contact with the heating wire and supplies oil to the heating wire, and the heating wire atomizes the oil on the oil guiding member to form a smoke, the step S2 being specific Includes substeps:

521. Obtain a first temperature value of the heating wire in a first engraving;

522. After the temperature of the heating wire rises to a preset second temperature value 吋, obtain a time required for the heating wire temperature to rise from the first temperature value to the second temperature value, where The second temperature value is less than or equal to a temperature value of the oil enthalpy of the oil guiding member;

523. Calculate a temperature change speed of the heating wire based on the first temperature value, the second temperature value, and the turn, and determine the electron when the change speed is greater than the preset value The smoke oil in the smoke is exhausted to stop supplying power to the heating wire.

[Claim 3] The method for detecting whether or not smoke oil in an electronic cigarette is exhausted according to claim 1, characterized in that

Step S2 is specifically: detecting a temperature of the heating wire by a temperature sensor to obtain a temperature change speed of the heating wire, and determining the smoke in the electronic cigarette when the changing speed is greater than a preset value The oil is exhausted and the power supply to the heating wire is stopped.

[Claim 4] A method of detecting whether or not smoke oil in an electronic cigarette is exhausted according to claim 3, wherein

The temperature sensor is a thermocouple temperature sensor, and the thermocouple temperature sensor is connected to an end of the heating wire.

[Claim 5] The method for detecting whether or not smoke oil in an electronic cigarette is exhausted according to claim 1, wherein

After step S2, the method further includes the steps of:

53. Output an alarm message to remind the user that the smoke oil is exhausted; wherein the alarm information includes At least one of text information, voice information, vibration information, and lighting information.

A method of detecting whether or not smoke oil in an electronic cigarette is exhausted according to claim 1, characterized in that

The step S2 is specifically:

Obtaining a voltage value of a voltage detection point in a circuit loop where the heating wire is located, calculating a resistance variation range of the heating wire in a preset turn based on the voltage value, and acquiring the heating wire based on the variation range The temperature changes speed, and after the change speed is greater than a preset value, determining that the smoke oil is exhausted in the electronic cigarette, and stops supplying power to the heating wire; wherein the resistance of the heating wire changes with temperature.

A method of detecting whether or not smoke oil in an electronic cigarette is exhausted according to claim 6, wherein said voltage detecting point is a heating wire end.

The method for detecting whether the smoke oil in the electronic cigarette is exhausted according to claim 7, wherein a voltage dividing resistor is connected in series in the power supply circuit of the heating wire, and the end of the heating wire is obtained in the step S2. The voltage value is specifically as follows:

Obtaining a voltage dividing value at both ends of the voltage dividing resistor, and acquiring a voltage value of the end of the heating wire based on a power supply voltage of the power supply circuit and the voltage dividing value.

The method for detecting whether or not smoke oil in an electronic cigarette is exhausted according to claim 8, wherein the electronic cigarette is provided with a microprocessor and a first electric connection with the microprocessor and the heating wire a first closing circuit, the first switching element and the heating wire are connected to two ends of the electronic cigarette battery to form a first loop, the microprocessor, the a second closing member, the voltage dividing resistor and the heating wire are connected to two ends of the electronic cigarette battery to form a second loop;

When the microprocessor controls the first switch, the second switch is controlled to be closed to operate the heating wire, and when the microprocessor controls the second switch And controlling the first closing member to close to obtain the voltage value of the end of the heating wire, and the method for detecting whether the smoke oil in the electronic cigarette is exhausted according to claim 7 is characterized in that: The step S2 specifically includes the sub-steps:

S24. Acquire a first voltage value of the end of the heating wire at the first engraving, and obtain the second voltage in the second engraving Taking a second voltage value of the end of the heating wire, wherein the second engraving is different from the first engraving by the predetermined time;

S25. Calculate, according to the first voltage value and the second voltage value, a magnitude of resistance change of the resistance of the heating wire within the predetermined turn, and obtain a temperature change of the heating wire based on the variation amplitude. Speed, and after the change speed is greater than a preset value, determining that the smoke oil is exhausted in the electronic cigarette to stop supplying power to the heating wire.

[Claim 11] An electronic cigarette, comprising: a detection control circuit, a heating wire for atomizing smoke oil, and a power supply circuit for supplying power to the detection control circuit and the heating wire; The control circuit is configured to control the power supply circuit to supply power to the heating wire after detecting the smoking signal, to operate the heating wire, and obtain a temperature change speed of the heating wire, and the speed of the change is greater than Set a value 吋 to determine that the smoke oil in the electronic cigarette is exhausted and stop supplying power to the heating wire.

[Claim 12] The electronic cigarette according to claim 11, wherein the detection control circuit comprises: a microprocessor and a temperature detecting sub-circuit connected to the microprocessor;

The microprocessor is configured to control the power supply circuit to supply power to the heating wire after detecting a smoking signal to operate the heating wire;

The temperature detecting sub-circuit is configured to obtain a temperature of the heating wire during operation of the heating wire, and the microprocessor is further configured to calculate a temperature change speed of the heating wire based on the temperature, and at the changing speed When the value is greater than the preset value, it is determined that the smoke oil in the electronic cigarette is exhausted, and the power supply circuit is controlled to stop supplying power to the heating wire.

[Claim 13] The electronic cigarette according to claim 11, wherein the detection control circuit comprises: a microprocessor and a voltage detecting sub-circuit connected to the microprocessor;

The voltage detecting sub-circuit is configured to obtain a voltage value of a voltage detecting point in a circuit loop where the heating wire is located after the heating wire is operated;

The microprocessor is further configured to calculate the heating wire in a preset space based on the voltage value a magnitude of the resistance change, and obtaining a temperature change speed of the heating wire based on the change width, and determining that the smoke oil is exhausted in the electronic cigarette to stop powering the heating wire after the change speed is greater than a preset value Wherein the resistance of the heating wire changes with temperature.

The electronic cigarette according to claim 13, wherein the voltage detecting point is a heating wire end, and the voltage detecting sub-circuit comprises:

a voltage dividing module connected to the microprocessor and the end of the heating wire for converting the voltage value into a readable voltage, so that the microprocessor calculates the heating wire based on the readable voltage Determining the magnitude of the resistance change in the predetermined turn, and obtaining the temperature change speed of the heating wire based on the change width, and determining that the smoke is exhausted in the electronic cigarette after the change speed is greater than a preset value Stop supplying power to the heating wire; wherein the readable voltage is a voltage that the microprocessor can recognize.

The electronic cigarette according to claim 14, wherein the detection control circuit further comprises: a first switch connected to the microprocessor; the microprocessor is configured to control the The first switch member is turned on or off to control the power supply circuit to supply power to the heating wire or to stop power supply;

The voltage detecting sub-circuit further includes: a second switch connected to the microprocessor; the microprocessor is configured to control the second switch to be turned on or off to control the voltage detector The circuit detects the voltage value or stops detecting the voltage value.

[Claim 16] The electronic cigarette according to claim 15, wherein the first shutoff member and the second shutoff member are field effect transistors;

a drain of the first switch member is connected to the heating wire, a source of the first switch member is grounded, and the microprocessor is connected to a gate of the first switch member for controlling The first shutoff member is turned on or off to control the power supply circuit to supply power to the heating wire or to stop power supply;

The voltage dividing module includes a first resistor, a second resistor and a first capacitor, one end of the first resistor is connected to the heating wire, and the other end of the first resistor is opposite to the second resistor a capacitor and the microprocessor are connected, the second resistor and the first capacitor The other end is connected and grounded;

a drain of the second switch member is connected to the heating wire and the first resistor, a source of the second switch member is grounded, and a gate of the microprocessor and the second switch member a pole connection for controlling the second switch to be turned on or off to control the voltage dividing module to acquire and convert the voltage value into a readable voltage or to stop acquiring the voltage value.

The electronic cigarette according to claim 12 or 13, wherein the electronic cigarette further comprises: an alarm circuit connected to the microprocessor;

The microprocessor is configured to output alarm data to the alarm circuit after determining that the smoke is exhausted in the electronic cigarette;

The alarm circuit is configured to output an alarm message based on the alarm data to remind the user that the smoke is exhausted; wherein the alarm information includes at least one of text information, voice information, vibration information, and light information.

The electronic cigarette according to claim 17, wherein the alarm circuit is specifically configured to display output alarm information, and the alarm circuit comprises: a display screen connected to the microprocessor, a wake-up sub-circuit connected to the microprocessor and the display screen;

The microprocessor is configured to output a wake-up trigger signal to the wake-up sub-circuit after determining that the smoke is exhausted in the electronic cigarette, and output alarm data for displaying output to the display screen;

The wake-up sub-circuit is configured to wake up the display screen after receiving the wake-up trigger signal; the display screen displays, after the wake-up, a text message outputting to remind the user that the smoke oil is exhausted based on the alarm data.

[Claim 19] The electronic cigarette according to claim 12 or 13, wherein the power supply circuit has a function module for charging an external device, and the electronic cigarette further includes a connection to the microprocessor The trigger circuit includes:

a first triggering switch, configured to output, to the microprocessor, a first trigger signal indicating that a smoking action is detected, after receiving the triggering action, to cause the microprocessor to control the first trigger signal based on the first trigger signal a power supply circuit supplies power to the heating wire;

a second triggering switch, configured to output a representation to the microprocessor after receiving the triggering action a second trigger signal for increasing the smoking power, so that the microprocessor controls the power supply circuit to increase the output power to the heating wire based on the second trigger signal;

a third triggering switch, configured to output, to the microprocessor, a third trigger signal indicating a reduced smoking power, after receiving the triggering action, to cause the microprocessor to control the said triggering signal based on the third triggering signal The power supply circuit reduces the output power to the heating wire;

a fourth triggering switch, configured to output, to the microprocessor, a fourth trigger signal indicating charging to an external device after receiving the triggering action, to enable the microprocessor to control the fourth trigger signal based on the fourth trigger signal The power supply circuit charges the external device.

The electronic cigarette according to claim 12 or 13, wherein the power supply circuit comprises: an inner charging interface, a charging management sub-circuit, a battery, and an external charging sub-circuit connected in sequence The charging interface is used to connect with an external power source and obtain power;

The charging management sub-circuit is further connected to the microprocessor, for charging management of the battery based on a battery charging management signal of the microprocessor; the external charging sub-circuit is further connected to the microprocessor A connection for charging an external device based on an external charging control signal of the microprocessor.