Electronic atomization device for detecting liquid level by using FPC (Flexible Printed Circuit)

Abstract

The utility model discloses an electronic atomization device utilizing an FPC (flexible printed circuit) to detect liquid level, which comprises an oil bin used for storing oil, and further comprises a detection circuit, the detection circuit comprises a liquid level detection unit and an FPC, the FPC is arranged near the oil bin, and the liquid level detection unit is connected with the FPC. The FPC is provided with an induction conductor which is electrically connected with the liquid level detection unit; the liquid level detection unit detects the capacitance of the induction conductor and obtains the liquid level in the oil bin according to the capacitance. According to the utility model, a circuit for detecting the liquid level of oil in the oil bin is simplified, and the installation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic cigarette technical field especially, utilize FPC to detect the electronic atomizing device of liquid level. BACKGROUND

[0002] Electronic atomizing device such as electronic cigarette, its inside generally is provided with oil storehouse to store tobacco tar, and the oil storehouse contains atomizing core and heats and atomizes tobacco tar.

[0003] The detection of tobacco tar liquid level in the oil storehouse of the existing electronic cigarette is generally detected through artificial window observation, or through detection circuit, and the existing detection circuit adopts optical detection circuit or needs to set special capacitor detection circuit, its circuit is complex, and the light detection element or capacitor induction element is not good installation.

[0004] Therefore, the prior art needs to be improved. UTILITY MODEL CONTENT

[0005] In view of the above deficiencies of the prior art, the utility model aims at providing an electronic atomizing device using FPC to detect liquid level, which aims at simplifying the circuit for detecting the oil liquid level in the oil storehouse and facilitating installation.

[0006] To achieve the above object, the utility model discloses the following technical scheme:

[0007] An electronic atomizing device using FPC to detect liquid level, comprising an oil storehouse for storing oil liquid, wherein:

[0008] The electronic atomizing device further comprises a detection circuit, which comprises a liquid level detection unit and an FPC, the FPC is arranged near the oil storehouse, and an induction conductor on the FPC is electrically connected with the liquid level detection unit.

[0009] The liquid level detection unit detects the capacitance of the induction conductor and obtains the liquid level in the oil storehouse according to the capacitance.

[0010] In some embodiments, the FPC is provided with independent first and second induction conductors.

[0011] In some embodiments, the FPC comprises a first FPC and a second FPC, the first FPC is provided with a first induction conductor, the second FPC is provided with a second induction conductor, and the first and second FPCs are arranged at intervals near the oil storehouse.

[0012] In some embodiments, the first and second induction conductors are both copper foils.

[0013] In some embodiments, the electronic atomization device further comprises a shell, the shell comprising an oil tank mounting shell at the upper section, a main shell at the lower section, an upper end of the oil tank mounting shell being provided with a plug-in interface for plugging in an atomizer with an oil tank, outer side walls of the oil tank mounting shell being provided with the first FPC and the second FPC at intervals, and the outer side walls of the oil tank mounting shell being further provided with a protective sleeve for covering the first FPC and the second FPC.

[0014] In some embodiments, the first FPC and the second FPC are annular around the outer side walls of the oil tank mounting shell.

[0015] In some embodiments, the liquid level detection unit comprises a master control chip and a capacitance detection chip electrically connected to the master control chip, the capacitance detection chip being electrically connected to the first sensing conductor of the first FPC and the second sensing conductor of the second FPC.

[0016] In some embodiments, the capacitance detection chip is provided with a first detection pin, a second detection pin, a reference pin and a signal output pin, the first detection pin being connected to the first sensing conductor, the second detection pin being connected to the second sensing conductor, the reference pin being connectable to a test point, and the signal output pin being connected to the master control chip.

[0017] In some embodiments, a first anti-interference resistor is connected in series between the first detection pin and the first sensing conductor, and a first anti-interference capacitor is connected in parallel between the first detection pin and the first sensing conductor, the other end of the first anti-interference capacitor being grounded.

[0018] A second anti-interference resistor is connected in series between the second detection pin and the second sensing conductor, and a second anti-interference capacitor is connected in parallel between the second detection pin and the second sensing conductor, the other end of the second anti-interference capacitor being grounded.

[0019] The reference pin is connected in series with a third anti-interference resistor and in parallel with a third anti-interference capacitor, the other end of the third anti-interference capacitor being grounded.

[0020] In some embodiments, the detection circuit further comprises a display unit electrically connected to the master control chip.

[0021] It should be understood that, within the scope of the present application, the above-mentioned technical features of the present application and the technical features described in detail in the following (such as the embodiments) can be combined with each other to form new or preferred technical solutions, and due to the limited space, they will not be listed one by one.

[0022] The present application has the following beneficial effects:

[0023] 1. Directly use FPC material and place a sensing conductor inside the FPC. Position the FPC near the oil tank. When the oil level changes, the capacitance of the sensing conductor changes. The oil level in the tank is calculated using the capacitance value, or the corresponding level or oil volume can be looked up using a capacitance-level correlation table. Alternatively, the copper foil inside the FPC can be used directly as the sensing conductor. This allows the capacitive sensing portion of the entire detection circuit to use commercially available FPCs, resulting in a simple, readily available, and low-cost circuit.

[0024] 2. FPC material is easy to install on electronic cigarettes, such as by directly pasting it onto the outer shell of the e-liquid tank, or onto the outer shell of the electronic cigarette corresponding to the e-liquid tank position. Installation is simple and quick. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the electronic atomizing device for detecting liquid level using an FPC according to this invention.

[0027] Figure 2 for Figure 1 A schematic diagram of the first decomposition of the structure.

[0028] Figure 3 This is a schematic diagram of the circuit principle of the electronic atomizing device for detecting liquid level using FPC according to the present invention.

[0029] Figure 4 This is a schematic diagram of the circuit principle of the electronic atomizing device for detecting liquid level using FPC, according to Embodiment 2 of this utility model.

[0030] Figure 5 for Figure 1 A schematic diagram of the second decomposition of the structure.

[0031] Figure 6 for Figure 1 Cross-sectional view of the structure.

[0032] Figure 7 for Figure 6 Enlarged diagram of point A in the middle.

[0033] Figure 8 This is a circuit connection diagram of the capacitance detection chip of this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100-electronic atomization device, 10-housing, 11-oil tank mounting shell, 111-plug interface, 1111-upper segment, 1112-lower segment, 112-wire slot, 113-step, 12-main machine shell, 20-atomizer, 21-oil tank, 211-oil tank shell, 212-oil storage cavity, 22-muff, 23-atomization core, 30-detection circuit, 31-display unit, 32-power supply, 33-key, 40-liquid level detection unit, 41-main control chip, 50-FPC, 51-first FPC, 52-second FPC, 60-induction conductor, 61-first induction conductor, 62-second induction conductor, 70-protection sleeve, 80-capacitance detection chip, 81-first detection pin, 82-second detection pin, 83-reference pin, 84-signal output pin, 91-first anti-interference resistor, 92-first anti-interference capacitor, 93-second anti-interference resistor, 94-second anti-interference capacitor, 95-third anti-interference resistor, 96-third anti-interference capacitor. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0038] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features.

[0040] Please refer to Figures 1 to 3 The utility model provides a kind of electronic atomization device 100 for detecting liquid level using FPC, including oil depot 21, the oil depot 21 is used to store oil liquid, and there is atomization core 23 in oil depot 21 and atomization is carried out to the oil liquid in oil depot 21.

[0041] The electronic atomization device 100 further includes a detection circuit 30, the detection circuit 30 includes a liquid level detection unit 40 and an FPC 50, which is a flexible printed circuit (Flexible Printed Circuit). The FPC is thin and flexible, and easy to install, such as directly attached to the surface of the installed location or glued to the surface of the installed location. The detection circuit 30 of the present embodiment further includes a power supply 32, which includes a battery management circuit and a battery. The power supply 32 supplies power to the electrical elements in the entire detection circuit 30.

[0042] The FPC 50 is arranged near the oil depot 21, and an inductive conductor 60 is arranged on the FPC 50 and electrically connected to the liquid level detection unit 40. The liquid level detection unit 40 detects the capacitance of the inductive conductor 60 and obtains the liquid level in the oil depot 21 according to the capacitance.

[0043] The FPC 50 can be arranged in various ways near the oil depot 21, such as directly attached to the outer surface of the housing of the oil depot 21, or there is a partition layer on the outer surface of the housing of the oil depot 21, and the FPC 50 is attached to the partition layer. As long as the inside of the FPC 50 corresponds to the position of the oil depot 21, the change of the oil liquid in the oil depot 21 can cause the inductive conductor 60 to sense the corresponding change. In the present embodiment, the inductive conductor 60 is used to sense the change of the capacitance on the inductive conductor 60 when the liquid level in the oil depot 21 changes. When the liquid level in the oil depot 21 changes, the capacitance on the inductive conductor 60 changes, and the change of the capacitance is detected by the liquid level detection unit 40 and converted into the liquid level of the oil liquid in the oil depot 21, thereby realizing automatic detection of the liquid level of the oil liquid in the oil depot 21.

[0044] The inductive conductor 60 of the present embodiment can be a metal conductor material such as copper, aluminum, silver, etc. The inductive conductor 60 can be a single one or two or more arranged apart. When the inductive conductor 60 is a single one, the inductive conductor 60 forms a capacitor with the liquid in the oil depot 21; when the inductive conductor 60 is two, the two spaced apart inductive conductors 60 form a capacitor.

[0045] The electronic atomization device 100 of the utility model, because set up liquid level detection unit 40, simultaneously set up FPC 50 in the vicinity of oil storehouse 21, inductive conductor 60 on FPC 50 is electrically connected with liquid level detection unit 40, when the liquid level in oil storehouse 21 changes, the capacitance on inductive conductor 60 changes, obtains the current capacitance of inductive conductor 60, then liquid level detection unit 40 calculates liquid level or inquires the pre-stored relational table and obtains the current liquid level according to the capacitance, and the capacitance and liquid level in the relational table correspond one by one.FPC material is simple and easy to obtain, can directly use the existing FPC on the market, inductive conductor 60 can also directly use the existing copper foil on FPC, so that the capacitance sensing circuit part in the whole detection circuit is very simple compared with the prior art, easy to realize, and the production cost is low, and the FPC material is very convenient to install, such as sticking, bonding, soldering and the like.

[0046] As a mode, the FPC 50 of the utility model is provided with independent first inductive conductor 61 and second inductive conductor 62.Namely, two independent separate inductive conductors 60 are arranged on a FPC 50, and the two independent separate inductive conductors 60 form a capacitor, and when the liquid level in the oil storehouse 21 changes, the capacitance on the two independent inductive conductors 60 will change.

[0047] As another mode, as shown in Figure 2 、 Figure 4 , the FPC 50 includes a first FPC 51 and a second FPC 52, the first FPC 51 is provided with a first inductive conductor 61, the second FPC 52 is provided with a second inductive conductor 62, and the first FPC 51 and the second FPC 52 are arranged at intervals near the oil storehouse 21.Namely, in the embodiment mode, two FPCs are provided, which are the first FPC 51 and the second FPC 52, and the two FPCs are respectively provided with their own inductive conductors 60, namely, the first FPC 51 is provided with the first inductive conductor 61, and the second FPC 52 is provided with the second inductive conductor 62, and the first inductive conductor 61 and the second inductive conductor 62 form a capacitor to sense the change of the capacitance when the liquid level in the oil storehouse 21 changes.

[0048] In the embodiment of the utility model, the first inductive conductor 61 and the second inductive conductor 62 are both copper foils, so that the existing FPC with copper foil can be directly used as the circuit of the capacitance sensing part of the utility model.

[0049] As shown in Figure 1 、 2, 5, the electronic atomization device 100 further comprises a shell 10, the shell 10 comprises an oil tank mounting shell 11 located in the upper section, a main shell 12 located in the lower section, the upper end of the oil tank mounting shell 11 is provided with a plug interface 111 for inserting an atomizer 20 with an oil tank 21, the outer side wall of the oil tank mounting shell 11 is provided with the first FPC 51, the second FPC 52, and the outer side of the oil tank mounting shell 11 is further provided with a protective sleeve 70 covering the first FPC 51 and the second FPC 52.

[0050] In this embodiment, the electronic atomization device 100 comprises an atomizer 20 and a shell 10, the atomizer 20 is plugged into the upper end of the shell 10, wherein the shell 10 is divided into upper and lower sections, the upper section is an oil tank mounting shell 11, and the lower section is a main shell 12. Figure 5 As shown, the upper end of the oil tank mounting shell 11 is provided with a plug interface 111, and the atomizer 20 is electrically connected to the circuit in the shell 10 after being inserted into the oil tank mounting shell 11 from the plug interface 111. The atomizer 20 comprises an oil tank 21, a suction nozzle 22 located at the upper end of the oil tank 21, and an atomization core 23 located in the oil tank 21. Figure 6 As shown, the main shell 12 is provided with a liquid level detection unit 40 and a power supply 32.

[0051] After the atomizer 20 is inserted into the oil tank mounting shell 11, the outer side of the oil tank 21 of the atomizer 20 is covered by the oil tank mounting shell 11 of the shell 10, as shown in Figure 7 The oil tank 21 is composed of an oil tank shell 211 and an oil storage cavity 212 in the oil tank shell 211, and the outer side of the oil tank shell 211 is the oil tank mounting shell 11, and then the first FPC 51 and the second FPC 52 are arranged on the outer side wall of the oil tank mounting shell 11 in the up-down direction. The first FPC 51 and the second FPC 52 can be pasted on the outer side wall of the oil tank mounting shell 11 by glue.

[0052] That is, the first FPC 51 and the second FPC 52 of the present embodiment are not directly arranged on the oil tank shell 211 of the atomizer 20, but are arranged on the oil tank mounting shell 11 outside the oil tank shell 211, so that the first FPC 51 and the second FPC 52 are separate components from the atomizer 20. The advantages of this arrangement are:

[0053] It is very suitable to use plug-in atomizers 20 or disposable atomizers 20 on the electronic atomization device 100, so that when the atomizer 20 is replaced, the first FPC 51 and the second FPC 52 on the electronic atomization device 100 will not be affected. The first FPC 51 and the second FPC 52 will not be replaced with the replacement of the atomizer 20, so that the first FPC 51 and the second FPC 52 can be used for a long time, saving materials, and without the need to make corresponding improvements on the existing atomizer 20, without affecting the mass production of the original atomizer 20.

[0054] In this embodiment, a protective sleeve 70 is provided outside the oil tank mounting shell 11 to protect the first FPC 51 and the second FPC 52 exposed on the oil tank mounting shell 11. Specifically, as shown... Figure 6 As shown, in this embodiment, a step 113 is provided between the oil tank mounting shell 11 and the main unit shell 12. The upper section of the oil tank mounting shell 11 is further divided into two sections, including an upper section 1111 and a lower section 1112 with different outer diameters. The upper section 1111 has a smaller outer diameter and is used to install the first FPC 51 and the second FPC 52. The lower section 1112 has a larger outer diameter and is used for interference fit with the protective sleeve 70. The different outer diameters of the upper section 1111 and the lower section 1112 ensure that the protective sleeve 70 will not damage the first FPC 51 and the second FPC 52 after it is put on. At the same time, the lower end of the protective sleeve 70 abuts against the step 113, and the step 113 acts as a limit.

[0055] Preferably, the oil tank mounting shell 11 of this embodiment is also provided with a wire groove 112. The wire groove 112 is used for wiring when the first FPC 51 and the second FPC 52 are connected to the circuit inside the shell 10, and the wire groove 112 avoids the interference of the protective sleeve 70 on the wiring.

[0056] In this embodiment, a button 33 and a display unit 31 are provided on the outer wall of the main housing 12. The button 33 is used for the on / off control of the electronic atomizing device 100, and the display unit 31 is part of the detection circuit 30, which can display the liquid level information in the oil tank 21.

[0057] Preferably, in this embodiment, the first FPC51 and the second FPC52 are both arranged in a ring shape on the outer side wall of the oil tank mounting shell 11. The ring shape of the first FPC51 and the second FPC52 facilitates the adjustment of the relative positions of the first sensing conductor 61 in the first FPC51 and the second sensing conductor 62 in the second FPC52 on the outside of the oil tank 21, so as to achieve stable and reliable capacitance detection.

[0058] Furthermore, the first sensing conductor 61 in the first FPC51 and the second sensing conductor 62 in the second FPC52 are both arranged in a ring on the outer side wall of the oil tank mounting shell 11. This increases the sensing area of ​​the first sensing conductor 61, the second sensing conductor 62 and the outer side of the oil tank 21, thereby increasing the sensitivity of detection.

[0059] Please continue to refer to this. Figure 4 The liquid level detection unit 40 in this embodiment includes a main control chip 41 and a capacitance detection chip 80 electrically connected to the main control chip 41. The capacitance detection chip 80 is electrically connected to the first sensing conductor 61 of the first FPC 51 and the second sensing conductor 62 of the second FPC 52.

[0060] In this embodiment, the liquid level detection unit 40 consists of a main control chip 41 and a capacitance detection chip 80. The capacitance detection chip 80 is used to obtain the capacitance of the capacitor formed by the first sensing conductor 61 and the second sensing conductor 62 and convert it into a voltage or current value. Then, the capacitance detection chip 80 sends the voltage or current value to the main control chip 41. The main control chip 41 performs conversion, calculation, analysis, and other processing on the voltage or current value, and compares it with a pre-stored oil tank liquid level correspondence table to obtain the actual liquid level of the oil tank 21. The liquid level correspondence table corresponds one-to-one with the voltage or current value. It can be understood that the electronic cigarette 100 can also pre-store an oil volume correspondence table, that is, a one-to-one correspondence between the voltage or current value and the oil volume in the oil tank 21, so that the automatic detection of the oil volume in the oil tank 21 can also be realized. The main control chip 41 of this utility model can be an existing microcontroller.

[0061] Preferably, the detection circuit 30 in this embodiment further includes a display unit 31 electrically connected to the main control chip 41. The main control chip 41 sends the liquid level or oil quantity information in the oil tank 21 of the atomizer 20 to the display unit 31 for display. When the liquid level or oil quantity is low, it reminds the user to refill or replace the atomizer 20 in time.

[0062] Specifically, such as Figure 4 and Figure 8 As shown, the capacitance detection chip 80 in this embodiment is provided with a first detection pin 81, a second detection pin 82, a reference pin 83, and a signal output pin 84. The first detection pin 81 is connected to the first sensing conductor 61, the second detection pin 82 is connected to the second sensing conductor 62, the reference pin 83 can be connected to a test point, and the signal output pin 84 is connected to the main control chip 41.

[0063] The first detection pin 81 and the second detection pin 82 detect the changes in capacitance on the first sensing conductor 61 and the second sensing conductor 62. The reference pin 83 outputs the corresponding voltage signal during the capacitance detection process to the test point for testing the relevant parameters in the capacitance calculation process. The signal output pin 84 sends the voltage or current signal corresponding to the capacitance obtained by the capacitance detection chip 80 to the main control chip 41 for processing.

[0064] Preferably, the capacitance detection chip 80 in this embodiment is a UTP9216B. The UTP9216B can detect capacitance and convert the capacitance into a voltage or current signal, which is then sent to the main control chip 41.

[0065] like Figure 8As shown, the capacitance detection chip U2 has 16 pins. Pin 15 is the first detection pin 81, pin 11 is the second detection pin 82, pin 16 is the reference pin 83, and pins 12 and 13 are signal output pins 84. The first detection pin 81 is connected to terminal TB1, which is connected to the first sensing conductor 61 of the first FPC51. The second detection pin 82 is connected to terminal TB2, which is connected to the second sensing conductor 62 of the second FPC52. The reference pin 83 is connected to terminal RESERVE, which is connected to an external test point. There are two signal output pins 84, connected to terminals OUT1 and OUT2 respectively. Terminals OUT1 and OUT2 are connected to the main control chip 41. In addition, pin 1 of U2 is connected to the power supply VDD, pin 5 is connected to the TCK clock signal, and pin 6 is connected to the DIO data signal.

[0066] Furthermore, such as Figure 4 As shown, a first anti-interference resistor 91 is connected in series with the first detection pin 81 and a first anti-interference capacitor 92 is connected in parallel between the first detection pin 81 and the first sensing conductor 61. The other end of the first anti-interference capacitor 92 is grounded. The first anti-interference resistor 91 and the first anti-interference capacitor 92 can prevent external signals from interfering with the acquisition of signals on the first sensing conductor 61 by the first detection pin 81.

[0067] A second anti-interference resistor 93 is connected in series between the second detection pin 82 and the second sensing conductor 62, and a second anti-interference capacitor 94 is connected in parallel. The other end of the second anti-interference capacitor 94 is grounded. The second anti-interference resistor 93 and the second anti-interference capacitor 94 can prevent external signals from interfering with the acquisition of signals on the second sensing conductor 62 by the second detection pin 82.

[0068] The reference pin 83 is connected in series with a third anti-interference resistor 95 and in parallel with a third anti-interference capacitor 96, the other end of which is grounded. The third anti-interference resistor 95 and the third anti-interference capacitor 96 can prevent external signals from interfering with the signal acquisition of the reference pin 83.

[0069] Specifically, such as Figure 8As shown in the diagram, in this embodiment, the first anti-interference resistor 91 is R2, the first anti-interference capacitor 92 is C12, R2 is connected in series between pin 15 of U2 and TB1, and C12 is connected in parallel between pin 15 of U2 and TB1; in this embodiment, the second anti-interference resistor 93 is R4, the second anti-interference capacitor 94 is C13, R4 is connected in series between pin 11 of U2 and TB2, and C13 is connected in parallel between pin 11 of U2 and TB2; in this embodiment, the third anti-interference resistor 95 is R3, the third anti-interference capacitor 96 is C4, R3 is connected in series between pin 16 of U2 and RESERVE, and C4 is connected in parallel between pin 16 of U2 and RESERVE, thereby improving the anti-interference performance of the entire capacitance detection chip 80 during signal acquisition.

[0070] The above description is merely an example to clearly illustrate the present utility model and is not intended to limit the patent scope of the present utility model. It is impossible to exhaustively list all the embodiments here. All equivalent structural transformations made using the content of the technical solution of the present utility model under the concept of the present utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An electronic atomizing device for detecting liquid level using an FPC, comprising an oil tank for storing oil, characterized in that: The electronic atomizing device also includes a detection circuit, which includes a liquid level detection unit and an FPC. The FPC is located near the oil tank, and an inductive conductor is provided on the FPC and electrically connected to the liquid level detection unit. The liquid level detection unit detects the capacitance of the sensing conductor and determines the liquid level in the oil tank based on the capacitance.

2. The electronic atomizing device for detecting liquid level using FPC according to claim 1, characterized in that, The FPC is provided with independent first and second inductive conductors.

3. The electronic atomizing device for detecting liquid level using FPC according to claim 1, characterized in that, The FPC includes a first FPC and a second FPC. The first FPC is provided with a first inductive conductor, and the second FPC is provided with a second inductive conductor. The first FPC and the second FPC are arranged at intervals near the oil tank.

4. The electronic atomizing device for detecting liquid level using an FPC according to claim 2 or 3, characterized in that, Both the first inductive conductor and the second inductive conductor are copper foil.

5. The electronic atomizing device for detecting liquid level using an FPC according to claim 3, characterized in that, The electronic atomizing device also includes a housing, which includes an oil tank mounting shell in the upper section and a main unit housing in the lower section. The upper end of the oil tank mounting shell is provided with an insertion interface for inserting an atomizer with an oil tank. The outer side wall of the oil tank mounting shell is provided with the first FPC and the second FPC at intervals. The outer side of the oil tank mounting shell is also covered with a protective sleeve to cover the first FPC and the second FPC.

6. The electronic atomizing device for detecting liquid level using FPC according to claim 5, characterized in that, The first FPC and the second FPC are both arranged in a ring around the outer side wall of the oil tank mounting shell.

7. The electronic atomizing device for detecting liquid level using FPC according to claim 3, characterized in that, The liquid level detection unit includes a main control chip and a capacitance detection chip electrically connected to the main control chip. The capacitance detection chip is electrically connected to the first sensing conductor of the first FPC and the second sensing conductor of the second FPC.

8. The electronic atomizing device for detecting liquid level using FPC according to claim 7, characterized in that, The capacitance detection chip is provided with a first detection pin, a second detection pin, a reference pin, and a signal output pin. The first detection pin is connected to the first sensing conductor, the second detection pin is connected to the second sensing conductor, the reference pin can be connected to a test point, and the signal output pin is connected to the main control chip.

9. The electronic atomizing device for detecting liquid level using an FPC according to claim 8, characterized in that, A first anti-interference resistor is connected in series between the first detection pin and the first sensing conductor, and a first anti-interference capacitor is connected in parallel. The other end of the first anti-interference capacitor is grounded. A second anti-interference resistor is connected in series between the second detection pin and the second sensing conductor, and a second anti-interference capacitor is connected in parallel. The other end of the second anti-interference capacitor is grounded. The reference pin is connected in series with a third anti-interference resistor and in parallel with a third anti-interference capacitor, and the other end of the third anti-interference capacitor is grounded.

10. The electronic atomizing device for detecting liquid level using an FPC according to claim 7, characterized in that, The detection circuit also includes a display unit electrically connected to the main control chip.

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