Anti-leakage electronic cigarette heating wire drive control circuit, method, chip and electronic cigarette

Abstract

The present invention relates to an anti-leakage electronic cigarette heating wire drive control circuit, method, chip and electronic cigarette, which are applied to an electronic cigarette using a capacitive microphone, and include a smoking detection circuit for detecting the capacitance value of the capacitive microphone in a smoking state; and also include an oil leakage protection circuit; the input end of the oil leakage protection circuit is connected to the output end of the capacitive microphone, and the output end is connected to the heating wire drive circuit of the electronic cigarette, and is used to detect the capacitance value of the capacitive microphone, and convert the capacitance value of the capacitive microphone into a first comparison signal; when the capacitance value of the capacitive microphone reaches a set oil leakage threshold, the heating wire drive circuit is controlled to be turned off to achieve the oil leakage protection function; the heating wire drive circuit is automatically detected and controlled to be turned off to achieve the oil leakage protection function, so as to prevent the electronic cigarette from being powered on and causing oil explosion in the case of oil leakage, so that the user can know the oil leakage of the electronic cigarette, and prevent the user from being scalded, thereby reducing the safety hazards of the electronic cigarette.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic cigarettes, and more specifically to a driving control circuit, method, chip and electronic cigarette for a heating wire of an anti-leakage electronic cigarette. Background Art

[0002] Electronic cigarettes are widely used due to their low price and convenience. Electronic cigarettes usually use atomizers to atomize the smoke liquid for users to use. When the smoke liquid is made, substances such as tar that are harmful to the body are removed, eliminating the harm to the human body.

[0003] When the electronic cigarette leaks oil during use, it is easy to cause the electronic cigarette to explode, causing burns to the user, and even causing the electronic cigarette to explode in severe cases, which is not conducive to the safe use of the electronic cigarette. There are few detection devices for detecting electronic cigarette oil leakage in existing electronic cigarettes, resulting in users being unable to know in time that the electronic cigarette has oil leakage, which poses a great safety hazard. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a leakage-proof electronic cigarette heating wire drive control circuit, method, chip and electronic cigarette in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the present invention to solve its technical problem is: constructing an anti-leakage electronic cigarette heating wire drive control circuit, which is applied to an electronic cigarette using a capacitive microphone, including a smoking detection circuit for detecting the capacitance value of the capacitive microphone in the smoking state; and also including an oil leakage protection circuit; the input end of the oil leakage protection circuit is connected to the output end of the capacitive microphone, and its output end is connected to the heating wire drive circuit of the electronic cigarette, which is used to detect the capacitance value of the capacitive microphone and convert the capacitance value of the capacitive microphone into a first comparison signal. When the capacitance value of the capacitive microphone reaches a set oil leakage threshold, the heating wire drive circuit is controlled to be closed to achieve the oil leakage protection function.

[0006] Furthermore, the oil leakage protection circuit comprises:

[0007] An oscillator, used to output an oscillation clock signal, the frequency of which changes with the capacitance value of the capacitive microphone;

[0008] A reference clock circuit, used for providing a reference clock;

[0009] a first digital counter, configured to receive an oscillation clock signal generated by the oscillator, and generate a first count value according to a frequency of the oscillation clock signal, wherein the first count value is the first comparison signal;

[0010] a first digital comparator, configured to compare the first count value with the oil leakage threshold;

[0011] An oil leakage judgment logic circuit is used to control the opening or closing of the heating wire driving circuit according to the comparison result;

[0012] The input end of the first digital counter is connected to the output end of the oscillator and the output end of the reference clock circuit respectively; the output end of the first digital counter is connected to the input end of the first digital comparator, and the output end of the first digital comparator is connected to the input end of the oil leakage judgment logic circuit;

[0013] When the first count value is less than or equal to the oil leakage threshold, the oil leakage judgment logic circuit outputs a closing signal to the heating wire driving circuit; when the first count value is greater than the oil leakage threshold, the oil leakage judgment logic circuit outputs an opening signal to the heating wire driving circuit.

[0014] Further, the smoking detection module includes an oscillator, a reference clock circuit, a second digital counter and a second digital comparator;

[0015] The second digital counter is used to receive the oscillation clock signal generated by the oscillator, and generate a second count value according to the frequency of the oscillation clock signal, wherein the second count value is a second comparison signal converted from the capacitance value of the capacitive microphone in the smoking state detected by the smoking detection module; the second digital comparator is used to compare the second count value with a set smoking threshold;

[0016] The input end of the second digital counter is connected to the output end of the oscillator and the output end of the reference clock circuit respectively; the input end of the second digital comparator is connected to the output end of the second digital counter, and the output end of the second digital comparator is connected to the input end of the oil leakage judgment logic circuit.

[0017] The present invention provides a method for driving and controlling a heating wire of an anti-leakage electronic cigarette, comprising the following steps:

[0018] S1: Obtain the capacitance value, convert the capacitance value into a comparison signal, set the reference value of the smoking state and the oil leakage state, and compare them;

[0019] S2: According to the comparison result, the heating wire driving circuit is controlled to be turned on or off.

[0020] Furthermore, the step S1 specifically includes:

[0021] Obtaining a capacitance value, and converting the capacitance value into a first count value and a second count value;

[0022] Set the smoking threshold C1 and the oil leakage threshold C2;

[0023] The first count value and the second count value are compared with the smoking threshold value C1 and the oil leakage threshold value C2.

[0024] Furthermore, the step of comparing the first count value and the second count value with the smoking threshold C1 and the oil leakage threshold C2 specifically includes:

[0025] The first count value is compared with the oil leakage threshold C2;

[0026] The second count value is compared with the puff threshold value C1.

[0027] Furthermore, the step S2 specifically includes:

[0028] When the first count value is greater than the oil leakage threshold C2 and the second count value is less than the smoking threshold C1, the heating wire driving circuit is turned on;

[0029] When the first count value is less than or equal to the oil leakage threshold C2, or the second count value is greater than the smoking threshold C1, the heating wire driving circuit is turned off.

[0030] The present invention provides an anti-leakage electronic cigarette chip, comprising a heating wire driving circuit, a reference voltage source circuit and a voltage-stabilized power supply circuit, and also comprising a heating wire driving control circuit as described in any one of the foregoing; the input end of the heating wire driving circuit is connected to the output end of the heating wire driving control circuit; the input end of the voltage-stabilized power supply circuit is connected to the output end of the reference voltage source circuit; the output end of the voltage-stabilized power supply circuit is respectively connected to the input end of an oscillator and the input end of a reference clock circuit, so as to provide a stable working voltage to the oscillator and the reference clock circuit.

[0031] Furthermore, it also includes a switch circuit; the switch circuit is connected to the oil leakage judgment logic circuit, and is used to output an opening signal to the indicating device when the electronic cigarette is in an oil leakage state.

[0032] The present invention provides an anti-leakage electronic cigarette, comprising a capacitive microphone head and an electronic cigarette chip as described in any one of the above.

[0033] The beneficial effects of the present invention are as follows: by setting a heating wire drive control circuit, when there is a smoking action on the electronic cigarette, the smoking detection circuit and the oil leakage protection circuit detect the capacitance value of the capacitive microphone head, and when the capacitance value exceeds the oil leakage threshold, the heating wire drive circuit is automatically controlled to be closed, so as to realize the oil leakage protection function, and prevent the electronic cigarette from being powered on when it is leaking and causing oil explosion. The user can be informed of the oil leakage of the electronic cigarette, so as to prevent the user from being scalded and reduce the safety hazards of the electronic cigarette. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0035] Figure 1 This is a structural block diagram of an electronic cigarette chip in one embodiment of the present invention;

[0036] Figure 2 It is a connection block diagram of a heating wire driving control circuit in another embodiment of the present invention;

[0037] Figure 3 This is a circuit connection block diagram of an electronic cigarette chip in another embodiment of the present invention;

[0038] Figure 4 A connection block diagram of a digital logic circuit in another embodiment of the present invention;

[0039] Figure 5 It is a flowchart of a heating wire driving control method in one embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0041] The preferred embodiment of the present invention is as follows Figure 2As shown, a heating wire driving control circuit for an anti-leakage electronic cigarette is provided, which is applied to an electronic cigarette using a capacitive microphone 9, and includes a smoking detection circuit for detecting the capacitance value of the capacitive microphone 9 in a smoking state; and also includes an oil leakage protection circuit; the input end of the oil leakage protection circuit is connected to the output end of the capacitive microphone 9, and the output end thereof is connected to the heating wire driving circuit 6 of the electronic cigarette, which is used to detect the capacitance value of the capacitive microphone 9 and convert the capacitance value of the capacitive microphone 9 into a first comparison signal. When the capacitance value of the capacitive microphone 9 reaches a set oil leakage threshold, the heating wire driving circuit 6 is controlled to be closed to achieve oil leakage prevention. Protection function: Both the smoking detection circuit and the oil leakage protection circuit detect the capacitance value of the capacitive microphone 9, and convert the capacitance value into a comparison signal, which is compared with the oil leakage threshold and the smoking threshold. According to the comparison result, if an oil leakage occurs, the heating wire drive circuit 6 is controlled to be turned off; if there is no oil leakage and the smoking state is in progress, the heating wire drive circuit 6 is controlled to be turned on, and the heating wire drive circuit 6 is automatically controlled to be turned off, thereby realizing the oil leakage protection function and preventing the electronic cigarette from being powered on in the case of oil leakage and causing oil explosion. The user can be informed of the oil leakage of the electronic cigarette, thereby preventing the user from being scalded and reducing the safety hazards of the electronic cigarette.

[0042] In a further embodiment, the oil leakage protection circuit includes an oscillator, a reference clock circuit and an oil leakage digital logic circuit 1:

[0043] Oscillator 3, used for outputting an oscillation clock signal. Oscillator 3 is a relaxation oscillator. The frequency of the oscillation clock signal changes with the capacitance value of the capacitive microphone 9. As the capacitance value of the capacitive microphone increases, the frequency of the oscillation clock signal generated by the relaxation oscillator decreases accordingly.

[0044] A reference clock circuit 4 is used to provide a reference clock; the reference clock circuit 4 uses a reference clock circuit relaxation oscillator so that the reference clock circuit 4 and the detected oscillation clock signal have the same temperature characteristics and voltage characteristics, thereby enhancing the reliability of the reference clock circuit;

[0045] The oil leakage digital logic circuit 1 comprises a first digital counter 11, a first digital comparator 12 and an oil leakage logic judgment circuit 13;

[0046] A first digital counter 11 is used to receive the oscillation clock signal generated by the oscillator 3, and generate a first count value according to the frequency of the oscillation clock signal, wherein the first count value is a first comparison signal; the count value generated by the first digital counter is the number of cycles of the oscillation clock signal within a reference time length T;

[0047] A first digital comparator 12, used for comparing the first count value with an oil leakage threshold;

[0048] The oil leakage judgment logic circuit 13 is used to control the opening or closing of the heating wire driving circuit 6 according to the comparison result;

[0049] The input end of the first digital counter 11 is connected to the output end of the oscillator 3 and the output end of the reference clock circuit 4 respectively; the output end of the first digital counter 11 is connected to the input end of the first digital comparator 12, and the output end of the first digital comparator 12 is connected to the input end of the oil leakage judgment logic circuit 13;

[0050] When there is a smoking action, when the first count value is less than or equal to the oil leakage threshold, the oil leakage judgment logic circuit 13 outputs a closing signal to the heating wire driving circuit 6; when the first count value is greater than the oil leakage threshold, the oil leakage judgment logic circuit 13 outputs an opening signal to the heating wire driving circuit 6; according to the comparison result, if an oil leakage state occurs, the heating wire driving circuit 6 is controlled to be closed, and if there is no oil leakage state and it is in the smoking state, the heating wire driving circuit 6 is controlled to be opened, and the heating wire driving circuit 6 is automatically controlled to be closed, so as to realize the oil leakage protection function, prevent the electronic cigarette from being powered on in the case of oil leakage and causing oil explosion. The user can know the situation of oil leakage of the electronic cigarette, prevent the user from being scalded, and reduce the safety hazards of the electronic cigarette.

[0051] In a further embodiment, the smoking detection module comprises an oscillator 3, a reference clock circuit 4 and a smoking digital logic circuit 2, wherein the smoking digital logic circuit 2 comprises a second digital counter 21 and a second digital comparator 22;

[0052] The second digital counter 21 is used to receive the oscillation clock signal generated by the oscillator 3, and generate a second count value according to the frequency of the oscillation clock signal, the second count value being a second comparison signal converted from the capacitance value of the capacitive microphone 9 in the smoking state detected by the smoking detection module; the second digital comparator 22 is used to compare the second count value with a set smoking threshold value;

[0053] The input end of the second digital counter 21 is connected to the output end of the oscillator 3 and the output end of the reference clock circuit 4 respectively; the input end of the second digital comparator 22 is connected to the output end of the second digital counter 21, and the output end of the second digital comparator 22 is connected to the input end of the oil leakage judgment logic circuit 13;

[0054] Among them, the first digital comparator 12 outputs an oil leakage signal, the second digital comparator 22 outputs a smoking signal, and the oil leakage judgment logic circuit 13 outputs an output signal of the trigger circuit; combined with the truth table of the oil leakage signal, the smoking signal and the output signal of the trigger circuit in Table 1, it can be obtained that when there is a smoking action, the capacitance value of the capacitive microphone 9 increases under the action of negative pressure, and the frequency of the oscillation clock signal decreases. Within a reference time length T, when the first count value is greater than the oil leakage threshold and the second count value is less than the smoking threshold, the electronic cigarette is in a non-leakage state, and the oil leakage judgment logic circuit 13 outputs an opening signal to the heating wire driving circuit 6, the first digital comparator 12 and the second digital comparator 22 generate a high level, and the heating wire heats up to generate. Generate smoke to achieve the smoking effect; when the first count value is less than or equal to the oil leakage threshold, the electronic cigarette is in an oil leakage state, the first digital comparator generates a low level, and the oil leakage judgment logic circuit 13 outputs a closing signal to the heating wire driving circuit 6, and the heating wire stops heating; when the second count value is greater than or equal to the smoking threshold, the second digital comparator 22 generates a low level, the oil leakage judgment logic circuit 13 outputs a closing signal to the heating wire driving circuit 6, the heating wire stops heating, and the heating wire driving circuit 6 is automatically controlled to be closed, so as to realize the oil leakage protection function, prevent the electronic cigarette from being powered on in the case of oil leakage and causing oil explosion, and the user can know the situation of oil leakage of the electronic cigarette, prevent the user from being scalded, and reduce the safety hazards of the electronic cigarette.

[0055] Table 1 Truth table of oil leakage signal, smoking signal and output signal of trigger circuit

[0056] Smoking signal Oil leak signal Output signal 0 0 0 1 0 1 1 1 0

[0057] In another embodiment, the present invention provides a method for driving and controlling a heating wire of an anti-leakage electronic cigarette. Figure 5 As shown, the following steps are included:

[0058] S1: Obtain the capacitance value, convert the capacitance value into a comparison signal, set reference values ​​of the smoking state and the oil leakage state, and compare them; wherein the oil leakage state is the first comparison signal, and the smoking state is the second comparison signal;

[0059] S2: According to the comparison result, the heating wire driving circuit is controlled to be turned on or off; the leakage of the electronic cigarette is detected, and the heating wire driving circuit is automatically controlled to be turned off to realize the leakage protection function, so as to prevent the electronic cigarette from being powered on when it is leaking and causing oil explosion. The user can know the leakage of the electronic cigarette, which can prevent the user from being scalded and reduce the safety risks of the electronic cigarette.

[0060] In a further embodiment, step S1 specifically includes:

[0061] Obtaining a capacitance value, and converting the capacitance value into a first count value and a second count value; the first comparison signal is the first count value, and the second comparison signal is the second count value;

[0062] Set the smoking threshold C1 and the oil leakage threshold C2;

[0063] The first count value and the second count value are compared with the smoking threshold value C1 and the oil leakage threshold value C2.

[0064] In a further embodiment, the step of comparing the first count value and the second count value with the smoking threshold C1 and the oil leakage threshold C2 specifically includes:

[0065] The first count value is compared with the oil leakage threshold C2;

[0066] The second count value is compared with the smoking threshold C1;

[0067] The first count value is set to X1, the second count value is set to X2, and the threshold value when the electronic cigarette is not in use is C3, where C3<C1.

[0068] In a further embodiment, step S2 specifically includes:

[0069] When the first count value is greater than the oil leakage threshold C2 and the second count value is less than the smoking threshold C1, the heating wire driving circuit is turned on;

[0070] When the first count value is less than or equal to the oil leakage threshold value C2, or the second count value is greater than the smoking threshold value C1, the heating wire driving circuit is turned off;

[0071] Combining the truth table of the oil leakage signal, the smoking signal and the output signal of the trigger circuit in Table 1, it can be obtained that within a reference time length T, when C1≤X1=X2<C3, there is no smoking action at the capacitive microphone 9, the heating wire driving circuit 6 is not powered, and the heating wire does not heat up; when C2<X1=X2<C1, the electronic cigarette is in a non-leakage state, and the oil leakage judgment logic circuit 13 outputs an opening signal to the heating wire driving circuit 6, and the heating wire heats up to generate smoke, achieving a smoking effect; when X2<C1 and X1≤C2, the electronic cigarette is in an oil leakage state, at which time the oil leakage judgment logic circuit 13 outputs a closing signal to the heating wire driving circuit 6, and the heating wire stops heating; the oil leakage of the electronic cigarette is detected, and the heating wire driving circuit 6 is automatically controlled to be closed, so as to realize the oil leakage protection function, prevent the electronic cigarette from being powered on in the case of oil leakage and causing oil explosion, and the user can know the oil leakage of the electronic cigarette, prevent the user from being scalded, and reduce the safety hazards of the electronic cigarette.

[0072] In another embodiment, an anti-leakage electronic cigarette chip, such as Figure 3 to Figure 4As shown, it includes a heating wire driving circuit 6, a reference voltage source circuit 81 and a voltage-stabilized power supply circuit 82, and also includes a heating wire driving control circuit as described above; the input end of the heating wire driving circuit 6 is connected to the output end of the heating wire driving control circuit; the input end of the voltage-stabilized power supply circuit 82 is connected to the output end of the reference voltage source circuit 81; the output end of the voltage-stabilized power supply circuit 82 is respectively connected to the input end of the oscillator 3 and the input end of the reference clock circuit 4, for providing a stable working voltage to the oscillator 3 and the reference clock circuit 4; the reference voltage source circuit 81 is a 1.2V reference voltage source circuit, and the voltage-stabilized power supply circuit 82 is a 2.5V voltage-stabilized power supply circuit, wherein the electronic cigarette chip is also provided with a timeout protection circuit, and the timeout protection circuit includes The timeout timer 51 is connected to the trigger circuit 52, and the output end of the timeout timer 51 is connected to the input end of the trigger circuit 52. The input end of the trigger circuit 52 and the input end of the timeout timer 51 are both connected to the output end of the oil leakage judgment logic circuit 13. The output end of the reference clock circuit 4 is connected to the input end of the timeout timer 51. The output end of the trigger circuit 52 is connected to the input end of the heating wire driving circuit 6 to prevent the user from taking a puff of cigarette for too long and damaging his health. The oil leakage of the electronic cigarette is detected, and the heating wire driving circuit 6 is automatically controlled to be closed to realize the oil leakage protection function to prevent the electronic cigarette from being powered on in the case of oil leakage and causing oil explosion. The user can know the oil leakage of the electronic cigarette to prevent the user from being scalded, thereby reducing the safety hazards of the electronic cigarette.

[0073] In a further embodiment, a switch circuit 71 is further included; the switch circuit 71 is connected to the oil leakage judgment logic circuit 13, and is used to output an open signal to the indication device 72 when the electronic cigarette is in an oil leakage state; the switch circuit 71 is connected to the indication device 72, such as light or audio, and when the electronic cigarette leaks oil, the switch circuit 71 will be triggered to output an open signal to the indication device 72, so that the user can be informed of the oil leakage of the electronic cigarette in time, thereby preventing the user from being scalded and reducing the safety hazards of the electronic cigarette.

[0074] In another embodiment, the present invention further provides an anti-leakage electronic cigarette, such as Figure 1As shown, it includes a capacitive microphone 9 and an electronic cigarette chip as described in any of the above items; the capacitive microphone 9 is connected to the electronic cigarette chip, and when there is a smoking action, the capacitance value of the capacitive microphone 9 increases under the action of negative pressure, and the frequency of the oscillation clock signal decreases. Within a reference time length T, when the first count value is greater than the oil leakage threshold and the second count value is less than the smoking threshold, the electronic cigarette is in a non-leakage state, and the oil leakage judgment logic circuit 13 outputs an opening signal to the heating wire driving circuit 6, the first digital comparator 12 and the second digital comparator 22 generate a high level, and the heating wire heats up to generate smoke to achieve the smoking effect; when the first count value is less than or equal to When the oil leakage threshold is reached, the electronic cigarette is in an oil leakage state, the first digital comparator 12 generates a low level, and the oil leakage judgment logic circuit 13 outputs a closing signal to the heating wire driving circuit 6, and the heating wire stops heating; when the second count value is greater than or equal to the smoking threshold, the second digital comparator 22 generates a low level, and the oil leakage judgment logic circuit 13 outputs a closing signal to the heating wire driving circuit 6, and the heating wire stops heating, and the heating wire driving circuit 6 is automatically controlled to be closed, thereby realizing the oil leakage protection function, preventing the electronic cigarette from being powered on in the case of oil leakage and causing oil explosion. The user can be informed of the oil leakage of the electronic cigarette, thereby preventing the user from being scalded and reducing the safety hazards of the electronic cigarette.

[0075] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A heating wire drive control circuit for an anti-leakage electronic cigarette, applied to an electronic cigarette using a capacitive microphone, comprising a smoking detection circuit for detecting the capacitance value of the capacitive microphone in a smoking state; characterized in that: It also includes an oil leakage protection circuit; the input end of the oil leakage protection circuit is connected to the output end of the capacitive microphone, and the output end is connected to the heating wire driving circuit of the electronic cigarette, which is used to detect the capacitance value of the capacitive microphone and convert the capacitance value of the capacitive microphone into a first comparison signal. When the capacitance value of the capacitive microphone reaches a set oil leakage threshold, the heating wire driving circuit is controlled to be closed to achieve the oil leakage protection function; The oil leakage protection circuit comprises: An oscillator, used to output an oscillation clock signal, the frequency of which changes with the capacitance value of the capacitive microphone; A reference clock circuit, used for providing a reference clock; a first digital counter, configured to receive an oscillation clock signal generated by the oscillator, and generate a first count value according to a frequency of the oscillation clock signal, wherein the first count value is the first comparison signal; a first digital comparator, configured to compare the first count value with the oil leakage threshold; An oil leakage judgment logic circuit is used to control the opening or closing of the heating wire driving circuit according to the comparison result; The input end of the first digital counter is connected to the output end of the oscillator and the output end of the reference clock circuit respectively; the output end of the first digital counter is connected to the input end of the first digital comparator, and the output end of the first digital comparator is connected to the input end of the oil leakage judgment logic circuit; When the first count value is less than or equal to the oil leakage threshold, the oil leakage judgment logic circuit outputs a closing signal to the heating wire driving circuit; when the first count value is greater than the oil leakage threshold, the oil leakage judgment logic circuit outputs an opening signal to the heating wire driving circuit; The smoking detection circuit includes an oscillator, a reference clock circuit, a second digital counter and a second digital comparator; The second digital counter is used to receive the oscillation clock signal generated by the oscillator, and generate a second count value according to the frequency of the oscillation clock signal, wherein the second count value is a second comparison signal converted from the capacitance value of the capacitive microphone in the smoking state detected by the smoking detection circuit; the second digital comparator is used to compare the second count value with a set smoking threshold value; When the first count value is greater than the oil leakage threshold and the second count value is less than the smoking threshold, the heating wire driving circuit is turned on; When the first count value is less than or equal to the oil leakage threshold, or the second count value is greater than the smoking threshold, the heating wire driving circuit is turned off.

2. The heating wire driving control circuit according to claim 1, characterized in that: The input end of the second digital counter is connected to the output end of the oscillator and the output end of the reference clock circuit respectively; the input end of the second digital comparator is connected to the output end of the second digital counter, and the output end of the second digital comparator is connected to the input end of the oil leakage judgment logic circuit.

3. A method for controlling the heating wire drive of an anti-leakage electronic cigarette according to the heating wire drive control circuit of any one of claims 1 to 2, characterized in that: The following steps are involved: S1: Obtaining a capacitance value, converting the capacitance value into a first count value and a second count value, setting a smoking threshold value C1 and an oil leakage threshold value C2, and comparing the first count value and the second count value with the smoking threshold value C1 and the oil leakage threshold value C2; S2: Controlling the opening or closing of the heating wire driving circuit according to the comparison result; when the first counting value is greater than the oil leakage threshold C2 and the second counting value is less than the smoking threshold C1, the heating wire driving circuit is turned on; when the first counting value is less than or equal to the oil leakage threshold C2, or the second counting value is greater than the smoking threshold C1, the heating wire driving circuit is turned off.

4. An anti-leakage electronic cigarette chip, comprising a heating wire driving circuit, a reference voltage source circuit and a voltage-stabilized power supply circuit, characterized in that: It also includes a heating wire drive control circuit as described in any one of claims 1-2; the input end of the heating wire drive circuit is connected to the output end of the heating wire drive control circuit; the input end of the voltage-stabilized power supply circuit is connected to the output end of the reference voltage source circuit; the output end of the voltage-stabilized power supply circuit is respectively connected to the input end of the oscillator and the input end of the reference clock circuit, for providing a stable operating voltage to the oscillator and the reference clock circuit.

5. The electronic cigarette chip according to claim 4, characterized in that: It also includes a switch circuit; the switch circuit is connected to the oil leakage judgment logic circuit and is used to output an opening signal to the indicating device when the electronic cigarette is in an oil leakage state.

6. An anti-leakage electronic cigarette, comprising a capacitive microphone, characterized in that: It also includes an electronic cigarette chip as described in any one of claims 4-5.

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