CN110876489A - A kind of identification method of electronic cigarette and cartridge type - Google Patents

Abstract

The invention discloses an electronic cigarette and a method for identifying the type of a cigarette cartridge, wherein the electronic cigarette comprises a cigarette rod and the cigarette cartridge, the cigarette rod is connected with the cigarette cartridge through a connector, the cigarette cartridge comprises a heating circuit, the heating circuit is provided with a heating wire for heating, the heating wire is in a spiral shape, the heating wire is connected with a first capacitor in parallel, and the first capacitor and the spiral heating wire form an LC oscillation circuit. According to the electronic cigarette and the method for identifying the type of the cigarette cartridge, the heating wire which is used for atomizing and heating by the heating circuit in the cigarette cartridge is the spiral heating wire, and the spiral heating wire is connected with the first capacitor in parallel, so that the spiral heating wire and the first capacitor form the LC oscillating circuit, and the cigarette rod of the electronic cigarette can identify the taste type of the cigarette cartridge according to the oscillation frequency or the oscillation period of the LC oscillating circuit.

Description

A kind of identification method of electronic cigarette and cartridge type

technical field

The invention relates to the technical field of electronic cigarettes, in particular to a method for identifying types of electronic cigarettes and cartridges.

Background technique

E-cigarettes are electronic products that mimic cigarettes and have a similar smoke, taste and feel to cigarettes. Electronic cigarettes usually include a pod and a cigarette rod, and the pod and the cigarette rod are detachably connected. In order to adapt to the different tastes of different users, there are various pods of different flavors. In order to achieve different tastes, it is necessary to use different e-liquids, add different flavors, and other different additives. In order to achieve the best taste, different flavors of e-liquids require different heating temperatures when heating and atomizing, that is to say, different heating temperatures are used for pods of different flavors to obtain the best flavor.

At present, the functions of the existing electronic cigarettes are relatively simple, and they cannot identify pods of different flavors, so they cannot adopt different heating temperatures according to pods of different flavors.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies and existing problems of the prior art, one of the objectives of the present invention is to provide an electronic cigarette that can effectively identify cartridge types with different flavors.

In order to achieve the above purpose, the present invention adopts the following technical solutions: an electronic cigarette, the electronic cigarette includes a cigarette rod and a pod, and the cigarette rod and the pod are connected by a connector, wherein:

The cartridge includes a heating circuit, the heating circuit has a heating wire for heating, the heating wire is in a spiral shape, and a first capacitor is connected in parallel with the heating wire, and the first capacitor is used for connecting with the heating wire in a spiral shape. The heating wire forms an LC oscillating circuit;

The cigarette rod includes a main control circuit, a cartridge insertion identification circuit, and a heating switch control circuit;

The main control circuit has a pulse signal output terminal for outputting pulse signals and a signal acquisition terminal for receiving feedback signals,

The cartridge insertion identification circuit is used to detect and identify whether the cartridge is connected to the cigarette rod, and the cartridge insertion identification circuit has a signal feedback end, and the signal feedback end is connected to the signal acquisition end of the main control circuit;

The heating switch control circuit is used to control the heating state of the heating wire, and the heating switch control circuit has a pulse signal input terminal, and the pulse signal input terminal is connected with the pulse signal output terminal of the main control circuit;

When the cartridge insertion identification circuit detects and recognizes that the cartridge is connected to the cigarette rod, the pulse signal output end of the main control circuit outputs a pulse signal, and the pulse signal is loaded into the LC oscillation circuit through the heating switch control circuit Above, the oscillating signal generated by the LC oscillating circuit is fed back to the main control circuit through the signal feedback terminal of the cartridge insertion identification circuit, and the main control circuit identifies the cartridge type according to the received oscillating signal.

Another object of the present invention is to provide a method for identifying the types of pods, by which the types of pods with different flavors can be effectively identified.

To achieve the above object, the present invention adopts the following technical solutions:

A method for identifying a cartridge type, the identification method is applied to the electronic cigarette described above, and the identification method includes:

S1. The first capacitor in the cartridge is used as an identification element for identifying the cartridge type, and the first capacitors of different types of cartridges correspond to different capacitance values;

S2. The cartridge insertion identification circuit identifies whether the cartridge is inserted into the cigarette rod, the signal feedback end of the cartridge insertion identification circuit sends identification information to the main control circuit, and the signal acquisition end of the main control circuit receives the The identification information of the pod determines whether the cartridge is inserted into the cigarette rod;

S3. After the main control circuit recognizes that the cartridge is inserted into the cigarette rod, the main control circuit outputs a pulse signal through the pulse signal output terminal, and loads the pulse signal to the LC oscillation circuit in the cartridge through the heating switch control circuit , the oscillating signal generated by the LC oscillating circuit is fed back to the main control circuit through the signal feedback terminal of the cartridge insertion identification circuit;

S4. The main control circuit identifies and calculates the oscillation frequency or oscillation period of the received oscillation signal, and the main control circuit determines and identifies the cartridge type of the cartridge according to the identified and calculated oscillation frequency or oscillation period.

The method for identifying the types of electronic cigarettes and cartridges provided by the present invention adopts a helical heating wire by using the heating circuit in the cartridge for atomization heating, and the helical heating wire is connected in parallel with a The first capacitor makes the helical heating wire and the first capacitor form an LC oscillation circuit, so that the cigarette rod of the electronic cigarette can identify the flavor type of the cartridge according to the oscillation frequency or oscillation period of the LC oscillation circuit, The electronic cigarette can use different heating and atomization temperatures according to different flavors of cartridges, so that the electronic cigarette can obtain the best taste effect.

Description of drawings

FIG. 1 is a schematic diagram of the circuit structure of the cartridge described in the embodiment of the present invention;

2 is a schematic diagram of the circuit structure of the cigarette rod in the embodiment of the present invention;

FIG. 3 is a schematic flowchart of the identification method according to the embodiment of the present invention.

Among them, 10- pod, 11- heating circuit, 20- cigarette rod, 21- main control circuit, 22- heating switch control electricity, 23- pod insertion identification circuit.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in Figure 1 and Figure 2, an electronic cigarette, the electronic cigarette includes a cigarette rod 20 and a pod 10, the cigarette rod and the pod are connected by a connector, wherein:

The cartridge 10 includes a heating circuit 11, the heating circuit has a heating wire LR for heating, the heating wire is spiral, and the heating wire is connected in parallel with a first capacitor C1, the first capacitor C1 is used for heating. To form an LC oscillation circuit with the helical heating wire LR;

The cigarette rod 20 includes a main control circuit 21, a cartridge insertion identification circuit 23, and a heating switch control circuit 22;

The main control circuit has a pulse signal output terminal D1 for outputting pulse signals and a signal acquisition terminal D2 for receiving feedback signals,

The cartridge insertion identification circuit 23 is used to detect and identify whether the cartridge 10 and the cigarette rod 20 are connected. The cartridge insertion identification circuit has a signal feedback terminal FB, and the signal feedback terminal FB is connected to the main control circuit. The signal acquisition terminal D2 is connected;

The heating switch control circuit 22 is used to control the heating state of the heating wire LR. The heating switch control circuit has a pulse signal input terminal HOT, the pulse signal input terminal HOT and the pulse signal output terminal D1 of the main control circuit. connect;

When the cartridge insertion identification circuit detects and recognizes that the cartridge is connected to the cigarette rod, the pulse signal output end of the main control circuit outputs a pulse signal, and the pulse signal is loaded into the LC oscillation circuit through the heating switch control circuit Above, the oscillating signal generated by the LC oscillating circuit is fed back to the main control circuit through the signal feedback terminal of the cartridge insertion identification circuit, and the main control circuit identifies the cartridge type according to the received oscillating signal. In this embodiment, the main control circuit identifies the type of the cartridge according to the oscillation frequency or oscillation period of the received oscillation signal.

In this embodiment, the connector includes a first connection end A1 and a second connection end A2 disposed on the cartridge 10 . The first connection end A1 and the second connection end A2 are respectively connected to the helical heating wire LR. The connector also includes a third connection end B1 and a fourth connection end B2 arranged on the cigarette rod 20. The third connection end B1 is connected to the cartridge insertion identification circuit 23 and the heating switch control circuit. 22 are connected, and the fourth connection end B2 is grounded; when the cigarette rod and the cartridge are connected through the connector, the first connection end A1 is connected with the third connection end B1, and the second connection end A2 is connected with the fourth connection end B2 .

In one of the preferred embodiments, the main control circuit is preferably an MCU main control circuit. In a specific embodiment, the specific chip of the MCU main control circuit may be N76E003AQ, and the package of the MCU chip is QFN20. Of course, in practical applications, other types of MCU chips can also be selected according to actual needs. In this embodiment, the MCU main control circuit can output the pulse signal through the pulse signal output terminal D1, that is, the MCU main control circuit has the function of outputting the pulse signal.

In a preferred embodiment, the cartridge insertion identification circuit 23 is shown in FIG. 2 , which specifically includes a third resistor R3 and a fourth resistor R4 connected in series, and the third resistor R3 and the fourth resistor R4 are connected to each other. The connected common node J1 is connected to the third connection terminal, the other end of the third resistor R3 is connected to the power supply terminal VCC, and the other end of the fourth resistor R4 is connected to the signal feedback terminal FB. In this embodiment, the power supply terminal VCC may be the positive connection terminal of the power supply battery in the cigarette rod of the electronic cigarette.

The pod insertion identification circuit 23 detects whether the pod is inserted into the cigarette rod and is normally connected to the cigarette rod by detecting the voltages of the third resistor R3 and the fourth resistor R4. Before the pod is not inserted into the cigarette rod, the power supply terminal VCC The voltage of the signal is transmitted to the signal feedback terminal FB through the third resistor R3 and the fourth resistor R4. At this time, the MCU main control circuit can collect and sense that the level of the signal feedback terminal FB is high, so the MCU main control circuit can The high level sensed by the collection is recognized as the insertion of the smokeless cartridge; when the cartridge is inserted into the cigarette rod and connected normally, since the heating wire LR is grounded, the third resistor R3 is transmitted to the high level of the signal feedback terminal FB and pulled down, At this time, the MCU main control circuit can recognize that the cartridge is inserted according to the low level sensed by the acquisition.

In a preferred specific embodiment, the heating switch control circuit 22, as shown in FIG. 2, includes a MOS transistor Q1, a first resistor R1 and a second resistor R2, and the gate of the MOS transistor Q1 passes through the first resistor R1. Two resistors R2 are connected to the pulse signal input terminal HOT, the source of the MOS transistor Q1 is connected to the power supply terminal VCC, and the drain of the MOS transistor Q1 is connected to the third connection terminal B1, that is, the MOS transistor The drain of Q1 is connected to the common node J1, and the power supply terminal VCC is also connected to the pulse signal input terminal through the first resistor R1.

In the electronic cigarette provided in this embodiment, since the heating wire of the heating circuit in the cartridge is in a spiral shape, it has the function of heating and also has the function of inductance. Therefore, the heating wire in the spiral shape is connected in parallel with the first capacitor C1. , can form an LC oscillator circuit. Since the capacitance value is different, the oscillation frequency or oscillation period will also be different. Therefore, the first capacitor C1 can be used as an identification element to identify pods of different flavors. The pods of different flavors have different capacitance values corresponding to the first capacitor C1. , the capacitance value of the first capacitor C1 is the same, and the flavor type of the corresponding pod is also the same. For example, for an apple-flavored cartridge, the capacitance value of the first capacitor C1 can be 1000P; for another example, for a papaya-flavored cartridge, the capacitance value of the first capacitor C1 is 2000P; or for a mint-flavored cartridge, the first capacitor C1 The capacitance value can be 3000P, etc., and so on, to customize the cartridges of different flavors. Of course, the flavor type of the pod and the corresponding capacitance value of the first capacitor C1 are only used for illustration, and in practice, the capacitance value of the first capacitor C1 can be selected as required. In this embodiment, the first capacitor C1 is preferably a chip capacitor, because the space in the cartridge is small, and the chip capacitor is selected to facilitate the installation of the first capacitor. It should be noted that the first capacitor C1 may be one capacitor, or may be composed of multiple capacitors in parallel and/or in series, as long as the space in the cartridge allows installation.

The heating switch control circuit in this embodiment is equivalent to a switch control circuit for controlling the heating state of the heating wire (that is, the heating wire works or does not work). When the MCU main control circuit recognizes that the cartridge is inserted, the MCU main control circuit The pulse signal output terminal D1 of the control circuit outputs a pulse signal, and the pulse signal input terminal HOT receives the pulse signal, and loads the pulse signal onto the cartridge through the MOS tube Q1. Therefore, the pulse signal sent by the MCU main control circuit will oscillate on the LC oscillating circuit, and the generated oscillating signal will be fed back through the signal feedback terminal FB connected to the fourth resistor R4. MCU main control circuit, the MCU main control circuit can determine the flavor type of the cartridge by identifying the oscillation frequency or oscillation period. For example, the capacitance value corresponding to the first capacitor C1 on the apple-flavored pod is 1000P. Assuming that the oscillation frequency generated by the LC oscillation circuit is 100MHZ at this time, the MCU main control circuit can determine the The flavor type is apple-flavored pod; or the capacitance value corresponding to the first capacitor C1 on the papaya-flavored pod is 2000P. At this time, the corresponding oscillation frequency generated by the LC oscillator circuit is 200MHZ, and the MCU main control circuit recognizes the oscillation according to the The frequency can determine that the flavor type of the pod at this time is papaya flavor pod. Since the oscillation period and the oscillation frequency have a reciprocal relationship with each other, the flavor type corresponding to the cartridge can also be determined by identifying the oscillation period. After identifying the pod with the corresponding flavor type, the pod can use the corresponding heating temperature to heat and atomize the e-liquid in the pod, so as to obtain the best taste effect.

The information of the cartridge type corresponding to the oscillation frequency or oscillation period can be stored in the MCU main control circuit in advance. or value range to determine the cartridge of the corresponding flavor type.

It should be noted that the MCU main control circuit has the function of outputting a pulse signal, which is a function that can be realized in the prior art, so it will not be described in detail here. In addition, the MCU main control circuit recognizes the oscillation frequency or oscillation period of the oscillation signal according to the oscillation signal, which is also a function that can be realized in the prior art, so it will not be described in detail here.

In the electronic cigarette provided in this embodiment, a helical heating wire is used as the heating wire used for atomization heating by the heating circuit in the cartridge, and the helical heating wire is connected in parallel with a first capacitor, so that the electric heating wire is connected in parallel. The spiral heating wire and the first capacitor form an LC oscillating circuit, so that the first capacitor C1 in the cartridge can be used as an identification element for the flavor type of the cartridge, so that the electronic cigarette can effectively identify cartridges with different flavors type. Compared with the prior art, the electronic cigarette provided in this embodiment only needs to use a spiral heating wire for the heating wire in the cartridge, and increase the capacitance connected in parallel with the heating wire, so that the electronic cigarette can be quickly and efficiently used. The flavor type of the pod is identified, which has the advantages of simple circuit structure and low cost; at the same time, since the heating wire is connected in parallel with a capacitor, it can effectively protect the MOS tube Q1 in the heating switch control circuit in the cigarette rod from being broken down. And effectively increase the effective value of the heating wire heating.

Example 2

This embodiment provides a method for identifying the type of cartridges. The identifying method is applied to the electronic cigarette described in Embodiment 1. As shown in FIG. 3 , the identifying method includes:

S1. The first capacitor in the cartridge is used as an identification element for identifying the cartridge type, and the first capacitors of different types of cartridges correspond to different capacitance values;

S2. The cartridge insertion identification circuit identifies whether the cartridge is inserted into the cigarette rod, the signal feedback end of the cartridge insertion identification circuit sends identification information to the main control circuit, and the signal acquisition end of the main control circuit receives the The identification information of the pod determines whether the cartridge is inserted into the cigarette rod;

S3. After the main control circuit recognizes that the cartridge is inserted into the cigarette rod, the main control circuit outputs a pulse signal through the pulse signal output terminal, and loads the pulse signal to the LC oscillation circuit in the cartridge through the heating switch control circuit , the oscillating signal generated by the LC oscillating circuit is fed back to the main control circuit through the signal feedback terminal of the cartridge insertion identification circuit;

S4. The main control circuit identifies and calculates the oscillation frequency or oscillation period of the received oscillation signal, and the main control circuit determines and identifies the cartridge type of the cartridge according to the identified and calculated oscillation frequency or oscillation period.

In this embodiment, when judging and identifying the cartridge type of the cartridge by the oscillation frequency or the oscillation period, the information of the cartridge type corresponding to the oscillation frequency or the oscillation period can be stored in the MCU main control circuit in advance. After the control circuit recognizes the oscillation frequency or oscillation period, the MCU main control circuit determines the cartridge of the corresponding flavor type according to the value or value range of the oscillation frequency or oscillation period.

In one of the preferred embodiments, the pulse signal is preferably a rectangular pulse signal. In addition, in the step S2, the identification information may be a high level or a low level, and when the identification signal received by the signal acquisition end of the main control circuit is a high level, the main control circuit recognizes and determines that it is smoke-free The cartridge is inserted into the cigarette rod; when the identification signal received by the signal acquisition end of the main control circuit is low level, the main control circuit recognizes and determines that a cartridge is inserted into the cigarette rod. Specifically, before the cartridge is inserted into the cigarette rod, the voltage of the power supply terminal VCC is transmitted to the signal feedback terminal FB through the third resistor R3 and the fourth resistor R4. At this time, the MCU main control circuit can collect and sense the signal feedback terminal FB. The level of the pod is high, so the MCU main control circuit can recognize it as a smokeless cartridge inserted according to the high level sensed by the acquisition; when the cartridge is inserted into the cigarette rod and connected normally, since the heating wire LR is grounded, the The high level of the third resistor R3 transmitted to the signal feedback terminal FB is pulled low. At this time, the MCU main control circuit can recognize that the cartridge is inserted according to the low level sensed by the acquisition.

The method for identifying the type of cartridge provided in this embodiment uses the first capacitor in the heating circuit in the cartridge of the electronic cigarette as an identification element for identifying cartridges with different flavors. This is due to the heating in the cartridge. The heating wire in the circuit is in a spiral shape, which not only has a heating function, but also has an inductive function. Therefore, the spiral heating wire can form an LC oscillation circuit after connecting the first capacitor C1 in parallel. Therefore, as long as a pulse signal is loaded in the LC oscillating circuit, an oscillating signal can be generated. Due to the different capacitance values, the oscillation frequency or oscillation period will also be different, so the first capacitor C1 can be used as an identification element for identifying cartridges with different flavors. According to this principle, pods of different flavor types can be customized according to actual needs, and then the first capacitance of each flavor type of pods corresponds to a capacitance value, that is, the difference between the first capacitors of different flavor types of pods The capacitance values are different, and the capacitance values of the first capacitors of the cartridges of the same flavor type are the same or similar. In order to facilitate identification, the difference in the capacitance value of the first capacitor of the cartridges with different flavors should be large, so that the corresponding oscillation frequencies or oscillation periods of cartridges with different flavors are also greatly different, which is convenient for identification. Improve the accuracy of recognition. For example, for apple-flavored pods, the capacitance value of the first capacitor C1 can be 1000P, while for papaya-flavored pods, the capacitance value of the first capacitor C1 is 2000P; or for mint-flavored pods, the first capacitor The capacitance value of C1 can be 3000P, etc., and so on, to customize the cartridges of different flavors. Of course, the flavor type of the pod and the corresponding capacitance value of the first capacitor C1 are only used for illustration, and in practice, the capacitance value of the first capacitor C1 can be selected as required. In addition, because there is a certain error in the capacitance value of the capacitors, in order to improve the accuracy of identification, the capacitance values of the first capacitors of the cartridges of the same flavor type do not have to be the same, as long as the capacitance values are close, for example, it can be set within a range. The capacitance value of the first capacitor C1 corresponds to a flavor type of cartridge, such as apple-flavored cartridges, the capacitance value of the first capacitor C1 is 950P-1050P, and for papaya-flavored cartridges, the capacitance value of the first capacitor C1 is 1950P-2050P; Or mint-flavored pods, the capacitance value of the first capacitor C1 is 2950P-3050P and so on.

For the convenience of explanation, it is assumed that the capacitance value corresponding to the first capacitor C1 on the apple-flavored pod is 1000P, and that the oscillation frequency generated by the LC oscillator circuit is 100MHZ at this time, the MCU main control circuit can determine this according to the identified oscillation frequency. The flavor type of the pod is apple-flavored pod; or suppose the capacitance value corresponding to the first capacitor C1 on the papaya-flavored pod is 2000P, and the corresponding oscillation frequency generated by the LC oscillator circuit is 200MHZ, and the MCU main control circuit recognizes it according to the The obtained oscillation frequency can determine that the flavor type of the pod at this time is papaya flavor pod. Since the oscillation period and the oscillation frequency have a reciprocal relationship with each other, the flavor type corresponding to the cartridge can also be determined by identifying the oscillation period. After identifying the pod with the corresponding flavor type, the pod can use the corresponding heating temperature to heat and atomize the e-liquid in the pod, so as to obtain the best taste effect.

It should be pointed out that the electronic cigarette provided in Example 1 and the method for identifying the types of cartridges provided in this embodiment are aimed at solving how to effectively identify the types of cartridges, and what corresponding heating temperature to use for different types of cartridges. It does not belong to the problem to be solved by the present invention, so it will not be described in detail here. In addition, as in Embodiment 1, the MCU main control circuit identifies the oscillation frequency or oscillation period of the oscillation signal according to the oscillation signal, which is also a function that can be realized by using the prior art, so it will not be described in detail here.

The method for identifying the type of the cartridge provided in this embodiment uses a spiral heating wire for the heating circuit in the cartridge for atomization heating, and uses the first capacitor C1 as the heating wire of the cartridge. The flavor type identification element, after the cartridge is inserted into the cigarette rod, loads the pulse signal to the LC oscillation circuit through the MCU main control circuit, and then the oscillation signal generated by the LC oscillation circuit is fed back to the MCU main control circuit, and finally the MCU main control circuit By identifying the oscillation frequency or oscillation period of the oscillation signal, the type of cartridge corresponding to the cartridge is determined and identified. Using the identification method provided in this embodiment, it is only necessary to use a spiral heating wire as the heating wire in the cartridge, and connect the first capacitor in parallel with the heating wire, which has the advantages of fast and accurate identification, simple circuit structure and low cost. At the same time, because the heating wire is connected in parallel with a capacitor, it can effectively protect the MOS tube Q1 in the heating switch control circuit in the cigarette rod from being broken down, thereby effectively improving the service life of the electronic cigarette.

The above-mentioned embodiments are preferred implementations of the present invention, and are not intended to limit the present invention. Any obvious replacements are within the protection scope of the present invention without departing from the inventive concept of the present invention.

Claims (8)

1. The utility model provides an electronic cigarette, electronic cigarette is including tobacco rod and cigarette bullet, and the tobacco rod passes through the connector with the cigarette bullet to be connected its characterized in that:

the cigarette bomb comprises a heating circuit, the heating circuit is provided with a heating wire for heating, the heating wire is in a spiral shape, the heating wire is connected with a first capacitor in parallel, and the first capacitor and the spiral heating wire form an LC oscillating circuit;

the cigarette rod is including master control circuit, cartridge insertion recognition circuit and heating switch control circuit, wherein:

the main control circuit is provided with a pulse signal output end for outputting a pulse signal and a signal acquisition end for receiving a feedback signal,

the cigarette bullet insertion identification circuit is used for detecting and identifying whether the cigarette bullet is connected with the cigarette rod or not, and is provided with a signal feedback end which is connected with the signal acquisition end of the main control circuit;

the heating switch control circuit is used for controlling the heating state of the heating wire and is provided with a pulse signal input end which is connected with the pulse signal output end of the main control circuit;

when the cigarette cartridge insertion identification circuit detects and identifies that the cigarette cartridge is connected with the cigarette rod, the pulse signal output end of the main control circuit outputs a pulse signal, the pulse signal is loaded to the LC oscillating circuit through the heating switch control circuit, an oscillating signal generated by the LC oscillating circuit is fed back to the main control circuit through the signal feedback end of the cigarette cartridge insertion identification circuit, and the main control circuit identifies the type of the cigarette cartridge according to the received oscillating signal.

2. The electronic cigarette of claim 1, wherein: the connector comprises a first connecting end and a second connecting end which are arranged on the smoke bomb, and the first connecting end and the second connecting end are respectively connected with two ends of the spiral electric heating wire;

the connector also comprises a third connecting end and a fourth connecting end which are arranged on the cigarette rod, the third connecting end is connected with the cigarette bullet insertion identification circuit and the heating switch control circuit, and the fourth connecting end is grounded; when the cigarette rod is connected with the cigarette bullet through the connector, the first connecting end is connected with the third connecting end, and the second connecting end is connected with the fourth connecting end.

3. The electronic cigarette of claim 2, wherein: heating switch control circuit includes MOS pipe Q1, first resistance R1 and second resistance R2, MOS pipe Q1's grid pass through second resistance R2 with the pulse signal input is connected, MOS pipe Q1's source electrode is connected with the feed end VCC, MOS pipe Q1's drain electrode with the third link is connected, the feed end VCC still passes through first resistance R1 with the pulse signal input is connected.

4. The electronic cigarette of claim 3, wherein: the cigarette bullet inserts recognition circuit including series connection third resistance R3 and fourth resistance R4, third resistance R3 and fourth resistance R4 interconnect's common node J1 with the third link is connected, third resistance R3's the other end with the supply end VCC connects, fourth resistance R4's the other end with the signal feedback end is connected.

5. The electronic cigarette according to any one of claims 1 to 4, wherein: the master control circuit is an MCU master control circuit.

6. The electronic cigarette according to any one of claims 1 to 4, wherein: the first capacitor C1 is a patch capacitor.

7. A method for identifying the type of a cartridge, which is applied to the electronic cigarette according to any one of claims 1 to 6, the method comprising:

s1, the first capacitors in the cartridges are used as identification elements for identifying the types of the cartridges, and the first capacitors of the cartridges of different types correspond to different capacitance values;

s2, the cartridge insertion identification circuit identifies whether the cartridge is inserted into the tobacco rod, a signal feedback end of the cartridge insertion identification circuit sends identification information to the main control circuit, and a signal acquisition end of the main control circuit judges whether the cartridge is inserted into the tobacco rod according to the received identification information;

s3, when the main control circuit identifies that the cigarette cartridge is inserted into the cigarette rod, the main control circuit outputs a pulse signal through a pulse signal output end, the pulse signal is loaded to an LC oscillating circuit in the cigarette cartridge through the heating switch control circuit, and an oscillating signal generated by the LC oscillating circuit is fed back to the main control circuit through a signal feedback end of the cigarette cartridge insertion identification circuit;

and S4, the main control circuit identifies and calculates the oscillation frequency or oscillation period of the received oscillation signal, and the main control circuit judges and identifies the type of the cartridge according to the identified and calculated oscillation frequency or oscillation period.

8. The identification method according to claim 7, characterized in that: in the step S2, the identification information is at a high level or a low level, and when the identification signal received by the signal acquisition end of the main control circuit is at a high level, the main control circuit identifies and determines that the smokeless cartridge is inserted into the cigarette rod; when the identification signal received by the signal acquisition end of the main control circuit is low level, the main control circuit identifies and judges that a cigarette cartridge is inserted into the cigarette rod.

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