CN-122004534-A - Electronic cigarette and communication circuit thereof

CN122004534ACN 122004534 ACN122004534 ACN 122004534ACN-122004534-A

Abstract

The invention discloses an electronic cigarette and a communication circuit thereof, and relates to the technical field of electronic cigarettes, wherein the electronic cigarette communication circuit comprises a switch microphone chip and a microcontroller which are interacted through digital communication; the micro controller determines the air flow intensity under the smoking state based on the first data and the second data so as to control the cigarette lighting power of the electronic cigarette, and can realize the control mode that the cigarette lighting power changes along with the change of the air flow intensity, namely simulate the effect that the cigarette lighting power changes along with the smoking force. The invention has the advantages of small cigarette lighting delay and high cigarette lighting control precision, and greatly improves the smoking experience of users.

Inventors

HUANG DONG

Assignees

深圳市世尔微电子科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260409
Priority Date: 20250721

Claims (12)

1. An electronic cigarette communication circuit, comprising: The switch microphone chip and the microcontroller are used for carrying out information interaction through the data packet; The switch microphone chip sends first data to the microcontroller, and transmits second data to the microcontroller in one or more idle states for sending the first data; The microcontroller determines the air flow intensity in the smoking state based on the first data and the second data so as to control the lighting power of the electronic cigarette.
2. The electronic cigarette communication circuit of claim 1, wherein, The first data is data which changes along with the change of airflow in the smoking state; the change frequency of the second data is less than or equal to the change frequency of the first data.
3. The electronic cigarette communication circuit of claim 1 or 2, wherein, The switch microphone chip periodically sends first data to the microcontroller when the electronic cigarette is in a smoking state; And when the switch microphone chip transmits the second data, the electronic cigarette is in a smoking state or a non-smoking state.
4. The electronic cigarette communication circuit of claim 2, wherein, The first data comprises K or Nt or A, and the second data comprises N0; or, the first data includes K or a, and the second data includes Nt; Wherein, K= (Nt-N0)/N0 or K= |Nt-N0|/N0 or K= (Nt-N0)/Nt or K= |Nt-N0|/Nt, K is the capacitance value change rate of the capacitive microphone, nt represents the real-time capacitance value of the capacitive microphone, N0 represents the reference capacitance value of the capacitive microphone, and A is the difference value of Nt-N0.
5. The electronic cigarette communication circuit of claim 4, wherein, The microcontroller comprises: the communication module is used for receiving the first data and the second data; the storage module stores a first corresponding relation between the change rate of the capacitance value and the lighting power; And the processing module is used for obtaining the current capacitance value change rate based on the first data and the second data, and determining the target point smoke power of the electronic cigarette according to the current capacitance value change rate and the first corresponding relation.
6. The electronic cigarette communication circuit of claim 5, wherein, The first corresponding relations stored by the storage module are multiple groups, and the reference capacitance values of the capacitive microphones corresponding to the different groups of the first corresponding relations are different; The processing module determines a current capacitance value change rate and a current reference capacitance value based on the first data and the second data, determines a target first corresponding relation corresponding to the current reference capacitance value in a plurality of groups of first corresponding relations, and determines target point smoke power corresponding to the current capacitance value change rate in the first target corresponding relation.
7. The electronic cigarette communication circuit of claim 5 or 6, wherein, The first corresponding relation is determined based on a second corresponding relation between the capacitance value change rate and the suction force and a third corresponding relation between the suction force and the cigarette lighting power, wherein the second corresponding relation is nonlinear.
8. The electronic cigarette communication circuit of claim 7, wherein, The second corresponding relation is characterized by a relation curve of a capacitance value change rate and suction force; The relation curve comprises a plurality of segments, and the cigarette lighting power corresponding to different segments is different.
9. The electronic cigarette communication circuit of claim 4, wherein, The microcontroller comprises a comparison module; the comparison module is used for comparing N0 obtained based on the first data and the second data with a reference threshold value and outputting a logic signal used for representing whether the capacitive microphone is abnormal or not.
10. The electronic cigarette communication circuit of claim 1, wherein, The data packet sent to the microcontroller by the switch microphone chip sequentially comprises a communication identification section, a data section and an ending state section; The data packet sent to the switch microphone chip by the microcontroller sequentially comprises a communication identification section, a read-write section, a data section and an end state section, wherein the read-write section is used for indicating that the execution task of the data packet is read operation or write operation.
11. The electronic cigarette communication circuit of claim 10, wherein, The switch microphone chip is communicated with the microcontroller through a single signal line; The communication identification section in the data packet sent by the switch microphone chip comprises a blank state section I and an arbitration section, and the communication identification section in the data packet sent by the microcontroller comprises a blank state section II; the length of the blank state section II is greater than the sum of the lengths of the blank state section I and the arbitration section; Or alternatively, the first and second heat exchangers may be, The communication identification section in the data packet sent by the switch microphone chip comprises a blank state section I, and the communication identification section in the data packet sent by the microcontroller comprises a blank state section II and an arbitration section; the length of the blank state section I is greater than the sum of the lengths of the blank state section II and the arbitration section.
12. An electronic cigarette, comprising the electronic cigarette communication circuit according to any one of claims 1-11, and further comprising a capacitive microphone and a heating circuit, wherein the capacitive microphone is connected with a switch microphone in the electronic cigarette communication circuit, and the heating circuit is connected with a microcontroller in the electronic cigarette communication circuit.

Description

Electronic cigarette and communication circuit thereof Technical Field The invention relates to the technical field of electronic cigarettes, in particular to an electronic cigarette and a communication circuit thereof. Background In recent years, electronic cigarettes have received attention as an innovative alternative to traditional tobacco products. The electronic cigarette mainly comprises a battery, an atomizer, a control circuit and tobacco tar, wherein the control circuit is key, and the tobacco tar is atomized by controlling the heating of an atomization core in the atomizer, so that the consumer demand is met. Referring to fig. 1, currently, the most common electronic cigarette control circuit generally includes a microphone, a switch microphone, and a heater switch. The miaow head is arranged in detecting the air current in the electron cigarette, and switch miaow chip is according to the detection data of miaow head confirm whether the user smokes to continuous output high level control heating switch switches on when confirming smoking, makes atomizing core heating realize the tobacco tar atomizing. When no smoking is determined, the switch microphone outputs a low level to control the heating switch to be turned off, and the coil heating is stopped. The waveform diagram of the control signal output by the switch microphone is shown in figure 2. The mode can only realize basic airflow switch function, namely, the suction is conducted, the power is off when the device is stopped, and the smoking experience of a user is poor. Disclosure of Invention The embodiment of the invention provides an electronic cigarette and a communication circuit thereof, which are used for at least overcoming the technical problems. In order to solve the problems, from the first aspect, the embodiment of the invention discloses an electronic cigarette communication circuit which comprises a switch microphone chip and a microcontroller, wherein the switch microphone chip performs information interaction through a data packet, the switch microphone chip sends first data to the microcontroller and transmits second data to the microcontroller in one or more idle states for sending the first data, and the microcontroller determines the air flow intensity in a smoking state based on the first data and the second data so as to control the cigarette lighting power of the electronic cigarette. In one embodiment of the invention, the first data is data which changes along with the change of the airflow in the smoking state, and the change frequency of the second data is less than or equal to the change frequency of the first data. In one embodiment of the invention, the switch microphone chip periodically transmits the first data to the microcontroller when the electronic cigarette is in a smoking state, and the electronic cigarette is in a smoking state or a non-smoking state when the switch microphone chip transmits the second data. In an embodiment of the invention, the first data comprises K or Nt or A, the second data comprises N0, or the first data comprises K or A, the second data comprises Nt, wherein K= (Nt-N0)/N0 or K= |Nt-N0|/N0 or K= (Nt-N0)/Nt or K= |Nt-N0|/Nt, K is the capacitance value change rate of the capacitive microphone, nt represents the real-time capacitance value of the capacitive microphone, N0 represents the reference capacitance value of the capacitive microphone, and A is the difference value of Nt-N0. In one embodiment of the invention, a microcontroller comprises: The communication module is used for receiving the first data and the second data; the storage module stores a first corresponding relation between the change rate of the capacitance value and the lighting power; The processing module obtains the current capacitance value change rate based on the first data and the second data, and determines the target point smoke power of the electronic cigarette according to the current capacitance value change rate and the first corresponding relation. In the embodiment of the invention, the first corresponding relations stored by the storage module are multiple groups, the reference capacitance values of the capacitance-type microphone corresponding to the different groups of first corresponding relations are different, the processing module determines the current capacitance value change rate and the current reference capacitance value based on the first data and the second data, determines the target first corresponding relation corresponding to the current reference capacitance value in the multiple groups of first corresponding relations, and determines the target smoke power corresponding to the current capacitance value change rate in the first target corresponding relation. In the embodiment of the invention, the first corresponding relation is determined based on a second corresponding relation between the capacitance value change rate and the suction force and a third corresponding relation