An electronic cigarette with a visible oil tank and its anti-condensation heating method

Abstract

This invention discloses an electronic cigarette with a visible oil tank and its anti-condensation heating method. The electronic cigarette with a visible oil tank includes a cigarette holder, in which a lithium battery and an atomizing component are housed in the oil cup. A window is opened on the cigarette holder opposite the installation position of the atomizing component, and a viewing window is opened on the surface of the atomizing component, allowing the internal structure of the atomizing component to be displayed through the window and viewing window. This allows the user to see whether the atomizing component is heated and producing atomized material, providing a convenient and intuitive understanding of the heating status. The lithium battery powers the atomizing component, which calculates the pre-puff duration based on stored historical data. The heating status of the atomizing component is controlled based on the pre-puff duration and the puffing action. The pre-puff duration calculated based on historical data represents the user's smoking habits. By controlling the heating status of the atomizing component according to the user's smoking habits, personalized vaping can be achieved, meeting the vaping needs of different users.

Description

Technical Field

[0001] This invention relates to the field of electronic cigarette technology, and in particular to an electronic cigarette with a visible oil tank and its anti-condensation heating method. Background Technology

[0002] Electronic cigarettes are electronic atomizing devices that use a heating wire to heat and vaporize e-liquid, such as... Figure 1 As shown, the e-cigarette device contains a lithium battery, a circuit board, a welding plate, and a tubular atomizing coil A within its oil reservoir. Within the atomizing coil, a mesh-like heating wire B and wicking cotton C are wound into a circle using a cylindrical steel tube and inserted into the atomizing tube. The lithium battery powers the circuit board, and the welding plate is used to fix the atomizing coil and is electrically connected to the circuit board. By driving the heating wires with different resistance values ​​through the circuit board, different power of heat can be output to atomize the e-liquid surrounding the heating wire, thus producing an atomized product for the user to inhale.

[0003] However, existing e-cigarettes have a closed overall structure, meaning users cannot see the internal components and are unsure if the e-cigarette has successfully vaporized. Furthermore, the atomization components are simple, the heating control on the circuit board is relatively basic, and there's no mechanism for users to adjust the control unit based on their smoking habits. This leads to significant condensation and fallback, severely impacting the user experience. The simple heating control also accelerates carbon buildup, resulting in a poor user experience in the later stages of e-liquid consumption.

[0004] In addition, the complex structure of the atomizer core makes its assembly difficult. The heating wire and oil-guiding cotton need to be inserted into the atomizer tube by wrapping them in a cylindrical steel tube, while the mesh-like heating wire and oil-guiding cotton require a high interference fit, resulting in high assembly difficulty, low efficiency, high cost, poor consistency and production difficulties.

[0005] Furthermore, because the heating wire is made of metal, it is prone to detaching from its circular shape due to material stress and immersion in e-liquid, resulting in it not adhering tightly to the wicking cotton and affecting the atomization flavor. The lead D of the heating wire is directly soldered to the mesh, and the mesh is easily pulled during the fixing of the lead, causing the heating wire on the mesh to deform or detach from the wicking cotton, resulting in assembly failure and poor stability of the atomizer core. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides an electronic cigarette with a visible oil tank and its anti-condensation heating method, thereby solving the problems that existing electronic cigarettes cannot show the atomization effect and cannot control the heating according to the user's smoking habits.

[0007] This invention provides an electronic cigarette with a visible oil tank, including a cigarette holder, in which a lithium battery and an atomizing component are disposed; a window is opened on the cigarette holder opposite the installation position of the atomizing component, and a viewing window is opened on the surface of the atomizing component, through which the interior of the atomizing component is displayed; the lithium battery supplies power to the atomizing component;

[0008] The atomizing component calculates the pre-inhale time for the user's next puff based on stored historical data, and controls the heating state based on the pre-inhale time and inhale action;

[0009] The formula for calculating the pre-absorption time Tnot is: Tv is the average duration of the preset number of suction sessions, and Tmse is the mean squared deviation of the suction duration. This is a reference time; the value is fixed.

[0010] The steps for controlling the heating state based on the pre-absorption duration and the aspiration action include: determining whether the current heating duration is greater than or equal to the pre-absorption duration; if so, stopping the heating and timing the stop duration; then determining whether the aspiration action has stopped; if not, continuing to determine whether the stop duration is greater than the reference time and the aspiration action is still in progress; if so, heating needs to continue; if the stop duration is less than the reference time, returning to the step of timing the stop duration and continuing to determine whether the aspiration action has stopped; and stopping the heating in advance before the user finishes aspiration.

[0011] Optionally, in the electronic cigarette with a visible oil tank, an airflow sensor is provided at the bottom of the cigarette holder and a main air intake is provided, and the airflow sensor is connected to the circuit board in the atomizing assembly.

[0012] Optionally, in the electronic cigarette with a visible oil tank, the atomizing component includes a circuit board, a board support, a mesh heating wire, oil-guiding cotton, an atomizing support, and an atomizing bottom cover;

[0013] The circuit board is installed in the groove of the board bracket, the oil-guiding cotton is placed in the reserved groove inside the atomizing bracket, the mesh heating wire is placed on the oil-guiding cotton, the board bracket is inserted into the atomizing bracket, the electrode pins on the circuit board abut against the mesh heating wire and fix the mesh heating wire between the circuit board and the oil-guiding cotton; the atomizing bottom cover is snapped and fixed to the atomizing bracket.

[0014] Optionally, in the electronic cigarette with a visible oil tank, the viewing window is located in the arched portion of the plate support.

[0015] Optionally, in the electronic cigarette with a visible oil tank, the mesh heating wire includes a first conductive sheet, a second conductive sheet, a third conductive sheet, a first heating wire, and a second heating wire; one end of the first heating wire is connected to the first conductive sheet, the other end of the first heating wire is connected to one end of the third conductive sheet, one end of the second heating wire is connected to the second conductive sheet, and the other end of the second heating wire is connected to the other end of the third conductive sheet.

[0016] Optionally, in the electronic cigarette with a visible oil tank, the first conductive sheet has a positive contact point for the first heating wire on its upright portion, and the second conductive sheet has a positive contact point for the second heating wire on its upright portion; the third conductive sheet has a negative contact point for the first heating wire on its left upright portion, and a negative contact point for the second heating wire on its right upright portion.

[0017] The four electrode pins on the circuit board are fixed in contact with the corresponding positive and negative terminals.

[0018] Optionally, in the electronic cigarette with a visible oil tank, the circuit board is provided with a first heating drive circuit, a second heating drive circuit, and a processor;

[0019] The first heating drive circuit controls the heating state of the first heating wire according to the first drive signal output by the processor, and detects the voltage of the first heating wire and feeds it back to the processor;

[0020] The second heating drive circuit controls the heating state of the second heating wire according to the second drive signal output by the processor, detects the voltage of the second heating wire and feeds it back to the processor.

[0021] Optionally, in the electronic cigarette with a visible oil tank, the first heating drive circuit includes a first switching transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor;

[0022] The gate of the first switching transistor is connected to one end of the first resistor and one end of the fifth resistor, and the other end of the fifth resistor is connected to the processor; the source of the first switching transistor is connected to the other end of the first resistor, the power supply terminal, and one end of the second resistor; the drain of the first switching transistor is connected to the other end of the second resistor, one end of the third resistor, the other end of the fourth resistor, and the first electrode pin; the other ends of the third resistor and the other ends of the fourth resistor are both connected to the processor.

[0023] A second aspect of the invention provides a method for preventing condensation heating of an electronic cigarette with a visible oil tank, comprising:

[0024] Upon startup, historical data is retrieved to calculate the pre-abspiration duration for the user's next aspiration.

[0025] The heating state is controlled based on the pre-suction duration and the suction action, and the heating duration for this operation is stored.

[0026] Optionally, in the aforementioned anti-condensation heating method, the step of obtaining historical data to calculate the pre-suction duration for the user's next suction stroke specifically includes:

[0027] Retrieve the storage of the aspiration duration for a preset number of times, and find the longest and shortest aspiration duration;

[0028] Calculate the average duration and the root mean square deviation of the aspiration duration for the preset number of aspirations based on each aspiration duration;

[0029] The pre-absorption time for the user's next suction is calculated based on the average duration and the mean square deviation of the suction duration.

[0030] In the technical solution provided by this invention, the electronic cigarette with a visible oil tank includes a cigarette holder. A lithium battery and an atomizing component are housed in the oil cup within the cigarette holder. A window is opened on the cigarette holder opposite the installation position of the atomizing component, and a viewing window is opened on the surface of the atomizing component. The internal structure of the atomizing component is displayed through the window and the viewing window, allowing the user to see whether the atomizing component is heated and producing atomized material, providing a convenient and intuitive understanding of the heating status. The lithium battery powers the atomizing component. The atomizing component calculates the pre-inhale duration for the user's next puff based on stored historical data, and controls the heating status based on the pre-inhale duration and the inhale action. The formula for calculating the pre-inhale duration Tnot is: Tv is the average duration of the preset number of suction sessions, and Tmse is the mean squared deviation of the suction duration. This is a reference time with a fixed value. The steps for controlling the heating state based on the pre-inhalation duration and inhalation action include: determining whether the current heating duration is greater than or equal to the pre-inhalation duration; if so, stopping heating and timing the stop duration; then determining whether the inhalation action has stopped; if not, continuing to determine whether the stop duration is greater than the reference time and there is still inhalation action; if so, heating needs to continue; if the stop duration is less than the reference time, returning to the step of timing the stop duration, and continuing to determine whether the inhalation action has stopped; stopping heating before the user finishes inhaling; the pre-inhalation duration calculated based on historical data represents the user's smoking habits; controlling the heating state of the atomizing component based on the user's smoking habits achieves personalized customization of the user's inhalation, meeting the inhalation needs of different users. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of an existing electronic cigarette atomizer core.

[0032] Figure 2 This is a cross-sectional view of the electronic cigarette with a visible oil tank in an embodiment of the present invention.

[0033] Figure 3 This is a schematic diagram of the air path of an electronic cigarette with a visible oil tank in an embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of the atomizing component in an embodiment of the present invention.

[0035] Figure 5 This is a schematic diagram of the structural installation of the first part of the atomizing component in an embodiment of the present invention.

[0036] Figure 6This is a schematic diagram of the structural installation of the second part of the atomizing component in an embodiment of the present invention.

[0037] Figure 7 This is a schematic diagram of the structural installation of the last part of the atomizing component in an embodiment of the present invention.

[0038] Figure 8 This is a schematic diagram of the circuit board, the mesh heating wire, and the oil-wicking cotton in an embodiment of the present invention.

[0039] Figure 9 This is a schematic diagram of the structure of the heating wire in the mesh of this invention.

[0040] Figure 10 This is a circuit block diagram of the circuit board in an embodiment of the present invention.

[0041] Figure 11 This is a circuit diagram of the first heating drive circuit and the second heating drive circuit in an embodiment of the present invention.

[0042] Figure 12 This is a flowchart of the anti-condensation heating method in an embodiment of the present invention. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] It is readily understood that relational terms such as "first" and "second" are used merely to distinguish one entity, operation, or direction from another, without requiring or implying any actual relationship or order between these entities, operations, or directions. The directional terms such as "up," "down," "left," "right," "front," "back," "front," "back," "top," and "bottom," mentioned or possibly used in this specification, are defined relative to the constructions shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be construed as restrictive. In the following description, various parameters and components are described for embodiments of different constructions. These specific parameters and components are merely examples and do not limit the embodiments of this application.

[0045] Please also refer to Figures 2 to 5The electronic cigarette with a visible oil tank provided in this embodiment of the invention includes a cigarette rod 1, in which an oil cup 2 is provided with a lithium battery 3 and an atomizing component 4; a window is opened on the cigarette rod 1 opposite to the installation position of the atomizing component 4, and a viewing window is opened on the surface of the atomizing component 4, through which the interior of the atomizing component 4 is displayed; the lithium battery 3 supplies power to the atomizing component 4; the atomizing component 4 calculates the pre-inhalation time based on stored historical data, and controls the heating state based on the pre-inhalation time and inhalation action.

[0046] like Figure 3 As shown, the bottom of the e-cigarette 1 is equipped with an airflow sensor 6 and a main air intake 5. The airflow sensor 6 is connected to the circuit board inside the atomizing component 4. When inhaling, the airflow enters through the main air intake 5, is collected by the airflow sensor 6 and transmitted to the processor. The airflow bypasses the lithium battery 3 and enters the atomizing component 4 through the atomizing air intake 7 at the bottom of the atomizing component 4. The atomizing component 4 heats and atomizes the e-liquid. The output atomized material is drawn out from the mouthpiece in the direction shown by the arrow, following the airflow.

[0047] This embodiment mainly improves the structure of the atomizing component 4, such as... Figures 4 to 9 As shown, the atomizing assembly 4 includes a circuit board 8, a board support 9, a mesh heating wire 10, oil-guiding cotton 11, an atomizing bracket 12, and an atomizing bottom cover 13; the circuit board 8 is installed in the groove of the board support 9 (e.g., Figure 5 As shown), the oil-guiding cotton 11 is placed in the reserved groove inside the atomizing bracket 12, and the mesh heating wire 10 is placed on the oil-guiding cotton 11 (as shown). Figure 6 (As shown). The plate bracket 9 is inserted into the atomizing bracket 12. The electrode pins 14 on the circuit board 8 abut against the mesh heating wire 10, fixing the mesh heating wire 10 between the circuit board 8 and the oil-guiding cotton 11. The atomizing bottom cover 13 is snapped and fixed to the atomizing bracket 12 (as shown). Figure 7 (As shown).

[0048] like Figure 5 As shown, four electrode pins 14 are provided on one side of the circuit board 8. The board support 9 is a silicone support. In order to wrap and protect the circuit board 8 and support and protect the four electrode pins 14, the overall outline of the board support 9 is similar to an arched column. The groove inside the board support 9 is adapted to the shape of the circuit board 8, so that the circuit board 8 can fit perfectly into the interior of the board support 9. The needles of the electrode pins 14 protrude from the groove and abut against the heating wire 10 of the mesh. The arched through-hole of the board support 9 provides a transmission air path for the atomized material.

[0049] like Figure 6 and Figure 7As shown, the atomizing bracket 12 is similar to a cylinder with a square groove carved out, the size of which is adapted to the plate bracket 9; a reserved groove for placing the oil-guiding cotton 11 and the mesh heating wire 10 is further provided on the square groove. After the cylindrical part of the plate bracket 9 is inserted into the atomizing bracket 12, the two fit tightly together to form a structure with an external outline similar to a cylinder. A through hole 24 is opened at the top of the atomizing bracket 12, and the through hole 24 is connected to the arched through groove to form the air passage for the atomized material. A slot 25 is provided on each of the two opposite outer walls of the square groove, and a buckle 15 is provided in each slot 25. One end of the atomizing bottom cover 13 is provided with two opposite locking arms 16, and locking holes 17 are opened on the locking arms 16. The locking arms 16 are inserted into the corresponding slots 25, and the locking holes 17 and the buckles 15 are locked and fixed, so that the atomizing bottom cover 13 and the atomizing bracket 12 can be locked and fixed. One end of the atomizing bottom cover 13 abuts against the bottom of the plate support 9, thus preventing the plate support 9 from moving. The three openings at the other end of the atomizing bottom cover 13, together with the arched through groove and through hole 24, form the air passage for the atomized material.

[0050] A transparent window 18 is opened in the arched part of the plate support 9. The atomizing component 4 is installed in the smoke rod 1. A window is opened on the smoke rod 1 at a position opposite to the window 18. Through this window, the user can easily see the working status of the mesh heating wire 10 and the atomized material produced after heating.

[0051] Please refer to the following: Figure 8 and Figure 9 The mesh heating wire 10 includes a first conductive sheet 19, a second conductive sheet 20, a third conductive sheet 21, a first heating wire 22, and a second heating wire 23; one end of the first heating wire 22 is connected to the first conductive sheet 19, and the other end of the first heating wire 22 is connected to one end of the third conductive sheet 21; one end of the second heating wire 23 is connected to the second conductive sheet 20, and the other end of the second heating wire 23 is connected to the other end of the third conductive sheet 21.

[0052] The first conductive sheet 19 and the second conductive sheet 20 are L-shaped, according to Figure 9 In the direction shown, the horizontal portions (narrower parts) of the two conductive sheets are opposite each other. The third conductive sheet 21 is concave, and its two vertical sides are opposite to the vertical portions (wider parts) of the first conductive sheet 19 and the second conductive sheet 20, respectively, so that the three conductive sheets are combined into a rectangle.

[0053] In this embodiment, the first heating wire 22 is connected between one end of the horizontal portion of the first conductive sheet 19 and one end of the horizontal portion of the third conductive sheet 21, and the second heating wire 23 is connected between the other end of the horizontal portion of the second conductive sheet 20 and the other end of the horizontal portion of the third conductive sheet 21. The first conductive sheet 19 serves as the positive electrode of the first heating wire 22, and its vertical portion has a positive electrode contact point A+. The second conductive sheet 20 serves as the positive electrode of the second heating wire 23, and its vertical portion has a positive electrode contact point B+. The third conductive sheet 21 serves as the shared negative electrode of the first heating wire 22 and the second heating wire 23 (i.e., the negative electrodes of the two heating wires are collinear), and its left vertical portion has a negative electrode contact point A- of the first heating wire, and its right vertical portion has a negative electrode contact point B- of the second heating wire. The four electrode pins of the circuit board 8 are respectively abutted and fixed to the corresponding positive and negative electrode contact points. When the circuit board 8 is working, the electrode pins conduct electricity, causing the corresponding heating wire to pass current and become heated, thereby heating the e-liquid on the wicking cotton and achieving atomization.

[0054] The first heating wire 22 and the second heating wire 23 can be heated individually or simultaneously. The resistance values ​​of the first heating wire 22 and the second heating wire 23 can be the same or different. In this embodiment, the first heating wire 22 is designed with a low resistance value, and the second heating wire 23 is designed with a high resistance value. Figure 9 As can be seen, the wave width L1 of the first heating wire 22 is narrower than the wave width L2 of the second heating wire 23. According to Ohm's law, for heating wires of the same diameter, the longer the wire, the greater the resistance. Therefore, the first heating wire 22 has a lower resistance but a higher heating temperature; the second heating wire 23 has a higher resistance than the first heating wire 22, but a lower heating temperature. When the first heating wire 22 and the second heating wire 23 heat together, they produce different temperature coefficients, which can improve the atomization of different substances in the e-liquid, making the e-liquid atomization more complete and the layering effect more accurate.

[0055] The conductive sheet and heating wire are made of the same material, including but not limited to metals such as iron-chromium-aluminum, nickel-chromium, and stainless steel; the disconnected areas of the conductive sheet are made using processes such as etching and stamping. The mesh heating wire 10 is assembled tightly against the oil-wicking cotton, and the size of the mesh heating wire and the oil-wicking cotton can be designed according to structural requirements or dimensional needs.

[0056] like Figure 10 As shown, the circuit board 8 is provided with a first heating drive circuit 81, a second heating drive circuit 82 and a processor (i.e., MCU); the first heating drive circuit is connected to the processor and the first electrode pin 141, the second heating drive circuit is connected to the processor and the second electrode pin 142, and the third electrode pin 143 and the fourth electrode pin 144 are both grounded.

[0057] The first heating drive circuit 81 controls the heating state of the first heating wire according to the first drive signal output by the processor, detects the voltage of the first heating wire and feeds it back to the processor; the second heating drive circuit 82 controls the heating state of the second heating wire according to the second drive signal output by the processor, detects the voltage of the second heating wire and feeds it back to the processor.

[0058] It should be understood that the circuit board also includes a battery charging management circuit, a mode switching circuit (which outputs a corresponding working mode switching signal according to the toggle switch), an LED status indicator circuit, and a second overcurrent and short-circuit detection circuit for each heating element. The circuit board is connected to an airflow sensor, which is existing technology, and its function and circuit structure remain unchanged. Details will not be provided here.

[0059] Please refer to the following: Figure 11 The first heating drive circuit 81 includes a first switch Q1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5. The gate of the first switch Q1 is connected to one end of the first resistor R1 and one end of the fifth resistor R5, and the other end of the fifth resistor R5 is connected to the processor. The source of the first switch Q1 is connected to the other end of the first resistor R1, the power supply terminal (i.e., the positive terminal of the lithium battery), and one end of the second resistor R2. The drain of the first switch Q1 is connected to the other end of the second resistor R2, one end of the third resistor R3, the other end of the fourth resistor R4, and the first electrode pin (TP1 represents the end of the first electrode pin, and the tip of the first electrode pin abuts against the mesh heating wire 10). The other ends of the third resistor R3 and the fourth resistor R4 are both connected to the processor, and TP3 represents the negative terminal of the lithium battery.

[0060] The first switching transistor Q1 is preferably an AO3415 PMOS transistor, and the processor outputs a first drive signal A_HEAT to control the switching on and off of the first switching transistor Q1. When the first drive signal A_HEAT is low, the first switching transistor Q1 is turned on, and the battery voltage BAT+ provided by the lithium battery is output through Q1 and supplies power to the first heating wire 22 through the top of the first electrode, forming a current loop to ground on the first heating wire 22, thus energizing the first heating wire 22 and starting to heat up. When the first drive signal A_HEAT is high, the first switching transistor Q1 is turned off, the battery voltage BAT+ stops being output, and the first heating wire 22 is de-energized and stops heating.

[0061] The first resistor R1 is preferably 10KΩ, serving as a pull-up protection to prevent Q1 from automatically operating when the processor's control terminal fails. The second resistor R2 is preferably 560KΩ, used for no-load detection, i.e., detecting whether the first electrode pin is connected to the first heating wire 22. The third resistor R3 and the fourth resistor R4 are preferably 1KΩ, both serving as current limiters to protect the analog input detection port connected to the processor. Through sampling by the third resistor R3, an A_CMP_N signal is output to the processor from its other end. The A_CMP_N signal is used to detect the voltage across the first heating wire 22. The processor determines whether the first heating wire 22 is short-circuited based on the voltage value of the signal from the first heating wire 22, thus activating overcurrent protection. The A_MOS_CHECK signal is output to the processor from the other end of the fourth resistor R4. The A_MOS_CHECK signal is also used to detect the voltage across the first heating wire 22. The processor determines whether the voltage output by the first heating wire 22 meets the working requirements. When the voltage is low, it indicates that the lithium battery power is insufficient, and the LED status indicator circuit can be controlled to light up the corresponding colored light to indicate the battery level. The resistance value of the fifth resistor R5 is preferably 1KΩ, which is used for current limiting protection on the circuit where the processor controls the on / off state of Q1 to prevent Q1 from burning out.

[0062] The second heating drive circuit 82 includes a second switch Q2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a tenth resistor R10. The gate of the second switch Q2 is connected to one end of the sixth resistor R6 and one end of the tenth resistor R10, and the other end of the tenth resistor R10 is connected to the processor. The source of the second switch Q2 is connected to the other end of the sixth resistor R6, the power supply terminal, and one end of the seventh resistor R7. The drain of the second switch Q2 is connected to the other end of the seventh resistor R7, one end of the eighth resistor R8, the other end of the ninth resistor R9, and the second electrode pin (TP2 represents the end of the second electrode pin, and the tip of the second electrode pin abuts against the mesh heating wire 10). The other ends of the eighth resistor R8 and the other ends of the ninth resistor R9 are both connected to the processor.

[0063] The second switch Q2 is preferably an AO3415 PMOS transistor, and the second drive signal D_HEAT output by the processor controls the on / off state of the second switch Q2. When the second drive signal D_HEAT is low, the second switch Q2 is turned on, and the battery voltage BAT+ provided by the lithium battery is output through Q2 and supplies power to the second heating wire 23 through the top of the second electrode, forming a current loop to ground on the second heating wire 23, thus energizing the second heating wire 23 and starting to heat up. When the second drive signal D_HEAT is high, the second switch Q2 is turned off, the battery voltage BAT+ stops being output, and the second heating wire 23 is de-energized and stops heating.

[0064] The sixth resistor R6 is preferably 10KΩ, serving as a pull-up protection to prevent Q2 from automatically operating when the processor's control terminal fails. The seventh resistor R7 is preferably 560KΩ, used for no-load detection, i.e., detecting whether the second heating wire 23 is connected. The eighth resistor R8 and the ninth resistor R9 are preferably 1KΩ, both serving as current limiters to protect the analog input detection port connected to the processor. Through sampling by the eighth resistor R8, a D_CMP_N signal is output to the processor from its other end. The D_CMP_N signal is used to detect the voltage across the second heating wire 23. The processor determines whether the second heating wire 23 is short-circuited based on the voltage value of the D_CMP_N signal, thus activating overcurrent protection. The D_MOS_CHECK signal is output to the processor from the other end of the ninth resistor R9, and the MCU_MOS_CHECK_B signal is also used to detect the voltage across the second heating wire 23. The processor determines whether the voltage output by the second heating wire 23 meets the working requirements. When the voltage is low, it indicates that the lithium battery power is insufficient, and the LED status indicator circuit can be controlled to light up the corresponding colored light to indicate the battery level. The resistance value of the tenth resistor R10 is preferably 1KΩ, which is used for current limiting protection on the circuit where the processor controls the on / off state of Q2 to prevent Q2 from burning out.

[0065] Based on the above-described electronic cigarette with a visible oil tank, this embodiment also provides a method for preventing condensation heating in an electronic cigarette with a visible oil tank, please refer to the following: Figure 12 The anti-condensation heating method includes the following steps:

[0066] S100: Upon startup, acquire historical data to calculate the pre-inhalation duration for the user's next inhalation.

[0067] S200: Control the heating state according to the pre-suction duration and suction action, and store the current heating duration.

[0068] When the button on the surface of the e-cigarette device 1 is pressed and held for a preset time (e.g., 3 seconds) or more, the device is activated. After activation, before the user takes a puff, the pre-puff duration is calculated based on historical data, specifically including:

[0069] Step 110: Obtain the storage of the aspiration duration for the preset number of times, and find the longest and shortest aspiration duration.

[0070] The processor has a queue storage space. The number of elements stored in the queue storage space is the same as the preset number of times (e.g., 10 times). Each time the device is closed, the suction duration of this time is counted and added to the queue storage space from the tail of the queue. After the preset number of times has been exceeded, the suction duration stored at the beginning of the queue is dequeued from the head of the queue. In this way, the queue storage space will only store the suction duration of the most recent preset number of times (e.g., 10 times) (T1, T2...T10), where T1 represents the suction duration of the last time (the 1st most recent time), T2 represents the suction duration of the 2nd most recent time, and so on, with T10 representing the suction duration of the 10th most recent time.

[0071] To find the longest and shortest suction duration (Tmax) among the last 10 suctions, a sequential comparison method can be used. First, compare the first two suction durations. Then, find the larger / smaller duration and compare it with the next suction duration in order. Continue this process until you compare it with the last suction duration. This will give you the maximum and minimum suction durations. For example, first compare T1 with T2. If T1 is larger, compare T1 with T3. If T2 is larger, compare T2 with T3. Find the larger suction duration and compare it with T4. Continue this process until you compare it with T5, and so on, until you compare it with T10. This will give you the maximum suction duration.

[0072] Step 120: Calculate the average duration and the root mean square deviation of the aspiration duration for the preset number of aspirations based on each aspiration duration.

[0073] The formula for calculating the average duration is: Tv = (T1 + T2 + ... + Tn) / n, where n represents the preset number of times. The mean squared deviation of the suction duration is Tmse.

[0074] Step 130: Calculate the pre-absorption time for the user's next aspiration based on the average duration and the mean square deviation of the aspiration duration.

[0075] The formula for calculating the pre-absorption time Tnot is: ,in, This represents a reference time, a fixed value, set to 50ms in this embodiment. This means that heating will stop for 50ms in subsequent steps. This value makes it difficult for the user to perceive that heating has stopped, thus not affecting the user's suction experience. In subsequent steps, if the user is still suctioning 50ms after heating has stopped, heating will be resumed.

[0076] There is a time lag between when the airflow sensor detects the end of the user's inhalation and when the heating drive circuit stops heating. During this time, the heating wire continues to heat, and the vapor produced cannot be expelled from the e-cigarette, causing condensation and accumulation. Excessive condensation over a long period can affect the flavor of the vaporized vapor during secondary atomization. The pre-inhalation time Tnot, calculated from historical data obtained through the above steps, represents the user's inhalation time habits. Based on the most recent 10 inhalation times, it is equivalent to dynamically estimating the user's next inhalation time. Based on this, the heating is stopped a short period before the user finishes inhaling, ensuring that the e-liquid vapor is fully expelled from the e-cigarette and reducing condensation. Since the early heating time is short, it is imperceptible to the user and does not affect the user experience.

[0077] Step S200 specifically includes:

[0078] Step 210: When a suction action is detected, start heating and start timing. Control the heating state according to the suction state and the pre-suction duration.

[0079] In this step, the airflow sensor 6 detects whether there is airflow at the main air intake 5. If there is, it indicates that there is a suction action; otherwise, there is no airflow. When suction begins, heating is started and the heating duration Th is timed. The pre-suction duration Tnot is calculated based on historical records and is only for reference. Therefore, it is determined whether the current heating duration Th is greater than or equal to the pre-suction duration Tnot. If so, it means that the pre-suction duration Tnot has been reached or exceeded, and heating can be stopped and the stop duration Tstop is timed. Otherwise, the process returns to the step of timed heating duration Th, and after timed, it continues to determine whether the current heating duration Th is greater than or equal to the pre-suction duration Tnot.

[0080] Next, determine if the suction action has stopped. If it has, end the suction session. If it hasn't stopped, continue to check if the stop duration Tstop is greater than the reference time. And there is still suction; this step is to confirm whether the predicted cessation of user suction was successful. If the predicted cessation of user suction lasts longer than [a certain duration], then [the process is considered successful]. If the user is still inhaling, it indicates that the initial assessment was incorrect; the user is actually still inhaling and heating needs to continue. Proceed to the next step to resume heating. If the stop time is less than [a certain duration], [further action is needed]. Return to the step of timing the stop duration Tstop and continue to determine whether the suction action has stopped.

[0081] Step 220: Resume heating. If the current aspiration duration exceeds the maximum aspiration duration, proceed to the next step.

[0082] In this step, after heating resumes, suction continues. It's necessary to determine if the current suction duration exceeds the maximum suction duration. If the suction duration exceeds the maximum suction duration among the last 10 suctions, the next step can be executed to prematurely end heating a short period before the user finishes suction. If the current suction duration is less than the maximum suction duration, the decision to continue heating is based on whether suction has stopped; that is, suction can be terminated when suction stops. If suction has not stopped, the current heating state is maintained, and the process returns to determine if the current suction duration exceeds the maximum suction duration.

[0083] Step 230: Stop heating and continue timing the heating duration, controlling the timing based on whether the suction action stops.

[0084] By understanding the user's vaping habits through the preceding steps and estimating the duration of the next puff based on historical data, heating is stopped a short time before the user finishes vaping to ensure that the e-liquid atomized material is fully expelled from the device and to reduce condensation. Although heating is stopped early, a small amount of residual heat and atomized material generated during the time difference may not be completely expelled. Therefore, the heating time needs to be continued, and then it's determined whether the vaping action has stopped. If the user stops vaping at this point, the current vaping session can end. If not, the heating time can be continued, and after a preset interval, the timer can be reset to determine whether the vaping action has stopped.

[0085] In summary, the electronic cigarette with a visible oil tank and its anti-condensation heating method provided by this invention utilizes a mesh heating wire divided into two heating wires to increase the heating and atomization area. The heating of the two heating wires is controlled by corresponding heating drive circuits, achieving two-way power control of the atomization of the two heating wires. The balanced temperature of the two circuits effectively addresses different substances in the e-liquid, improving the complete atomization degree and providing different levels of sensation. Windows on the cigarette holder and atomizing assembly showcase the interior of the atomizing assembly; this allows users to see whether the atomizing assembly is heating and producing atomized material, providing a convenient and intuitive understanding of the heating status.

[0086] To address the consistency and quality issues in the assembly of existing atomizer cores with heating wires and wicking cotton wrapped around cylindrical steel tubes, a side-mounted assembly method is adopted. This eliminates the need for the cylindrical steel tube to deform the heating wire, removing lead wires. The heating wire rests directly on the flat surface of the wicking cotton. Electrode pins on the circuit board conduct electricity through contact with the heating wire to generate atomization. This side-mounted assembly ensures the heating surface is on the airflow surface, allowing for easy inhalation of the e-liquid. Removing the cylindrical steel tube allows the heating wire to adhere tightly to the wicking cotton, preventing stress and deformation. Furthermore, the absence of leads on the heating wire, relying on electrode pins for contact and heating, solves the problem of deformation caused by fixed leads in traditional atomizer structures, avoiding the risk of deformation, flavor distortion, or burning. The atomizer assembly has a simple and stable structure, a delicate flavor, and good e-liquid flavor reproduction. The required jigs and materials are reduced, lowering the assembly difficulty.

[0087] Based on historical data, the pre-puff duration is calculated, and the user's next puff duration is dynamically estimated. Heating is stopped a short time before the user finishes puffing to ensure that e-liquid atomized material is fully expelled from the device, reducing condensation and localized carbon buildup. Because the early heating stop is so short, it is imperceptible to the user and does not affect the user experience.

[0088] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A visual oil tank electronic cigarette, comprising a cigarette rod, characterized in that, The oil cup in the tobacco rod is provided with a lithium battery and an atomization assembly; a window is formed on the tobacco rod at a position opposite to the mounting position of the atomization assembly, and a viewing window is formed on the surface of the atomization assembly, so as to show the inside of the atomization assembly through the window and the viewing window; the lithium battery supplies power to the atomization assembly. The atomization assembly calculates a pre-puffing duration of a next puff of the user according to the stored historical data, and controls a heating state according to the pre-puffing duration and the puffing action; a calculation formula of the pre-puffing duration Tnot is as follows: , Tv is an average duration of the puffing duration of the preset number of times, and Tmse is a mean square error of the puffing duration; is a reference time, and the value is fixed; The step of controlling the heating state according to the pre-puffing time length and the puffing action comprises: determining whether the current heating time length is greater than or equal to the pre-puffing time length; if yes, stopping heating and timing the stopping time length; then determining whether the puffing action is stopped; if not, continuing to determine whether the stopping time length is greater than a reference time and whether the puffing action is still present; if yes, continuing to heat; if the stopping time length is less than the reference time, returning to the step of timing the stopping time length; and continuing to determine whether the puffing action is stopped; and stopping heating in advance before the user finishes puffing.

2. The visualized oil reservoir e-cigarette of claim 1, wherein, The bottom of the tobacco rod is provided with an airflow sensor and a main air inlet hole, and the airflow sensor is connected with a circuit board in the atomization assembly.

3. The visualized oil reservoir e-cigarette of claim 2, wherein, The atomization assembly comprises a circuit board, a board support, a mesh heating wire, a oil guide cotton, an atomization support and an atomization bottom cover. The circuit board is installed in a groove of the board support, the oil guide cotton is placed in a reserved groove in the inside of the atomization support, the mesh heating wire is placed on the oil guide cotton, the board support is inserted into the atomization support, the electrode pins on the circuit board abut against the mesh heating wire to fix the mesh heating wire between the circuit board and the oil guide cotton, and the atomization bottom cover is clamped and fixed with the atomization support.

4. The visualized oil reservoir e-cigarette of claim 3, wherein, The viewing window is formed in an arched portion of the board support.

5. The visualized oil reservoir e-cigarette of claim 3, wherein, The mesh heating wire comprises a first conductive sheet, a second conductive sheet, a third conductive sheet, a first heating wire and a second heating wire; one end of the first heating wire is connected with the first conductive sheet, the other end of the first heating wire is connected with one end of the third conductive sheet, one end of the second heating wire is connected with the second conductive sheet, and the other end of the second heating wire is connected with the other end of the third conductive sheet.

6. The visualized oil reservoir e-cigarette of claim 5, wherein, A positive contact point of the first heating wire is arranged on a vertical portion of the first conductive sheet, and a positive contact point of the second heating wire is arranged on a vertical portion of the second conductive sheet; a negative contact point of the first heating wire is arranged on a left vertical portion of the third conductive sheet, and a negative contact point of the second heating wire is arranged on a right vertical portion of the third conductive sheet. Four electrode pins of the circuit board are respectively abutted and fixed with corresponding positive and negative contact points.

7. The visualized oil reservoir e-cigarette of claim 6, wherein, The circuit board is provided with a first heating drive circuit, a second heating drive circuit and a processor. The first heating drive circuit controls the heating state of the first heating wire according to a first drive signal output by the processor, detects the voltage of the first heating wire and feeds back to the processor. The second heating drive circuit controls the heating state of the second heating wire according to a second drive signal output by the processor, detects the voltage of the second heating wire and feeds back to the processor.

8. The visualized oil reservoir e-cigarette of claim 7, wherein, The first heating drive circuit comprises a first switch tube, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor. The gate of the first switch tube is connected with one end of the first resistor and one end of the fifth resistor, the other end of the fifth resistor being connected with the processor; the source of the first switch tube is connected with the other end of the first resistor, the power supply end and one end of the second resistor; the drain of the first switch tube is connected with the other end of the second resistor, one end of the third resistor, the other end of the fourth resistor and the first electrode needle; the other end of the third resistor and the other end of the fourth resistor are both connected with the processor.

9. A method of anti-condensation heating of an electronic cigarette employing the visual oil reservoir of claim 1, characterized by, Comprise: When starting, historical data is acquired to calculate the pre-puff duration of the next puff of the user; According to the pre-puff duration and the puffing action, the heating state is controlled, and the current heating duration is stored.

10. The anti-condensation heating method of claim 9, wherein, The step of acquiring historical data to calculate the pre-puff duration of the next puff of the user specifically comprises: Acquire the stored puffing duration of a preset number of times, find out the longest puffing duration and the shortest puffing duration; According to each puffing duration, the average duration of the puffing duration of the preset number of times and the puffing duration mean square deviation are calculated; According to the average duration and the puffing duration mean square deviation, the pre-puff duration of the next puff of the user is calculated.

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