EP-4740768-A1 - METHOD FOR MEASURING NUMBER OF PUFFS AND AEROSOL GENERATING DEVICE

EP4740768A1EP 4740768 A1EP4740768 A1EP 4740768A1EP-4740768-A1

Abstract

The present disclosure relates to the technical field of electronic atomization, and discloses a method for measuring a number of puffs and an aerosol generating device. In the method for measuring a number of puffs, based on a relationship between a coil voltage and a temperature at resonance, the coil voltage at each moment is collected in real time, a real-time temperature of an induction heater assembly is determined according to each coil voltage, and the number of puffs of the aerosol generating device is measured according to the real-time temperature. Then, the aerosol generating device is replenished with energy according to the number of puffs, an amount of aerosols can be guaranteed to be adjusted to maintain in a vapeable state, and tastes and puff experience can be improved. In addition, by determining the number of puffs of the aerosol generating device based on the coil voltage, dependence on a measuring chip is eliminated, and the problem of insufficient or excessive heat absorption of an aerosol generating substrate caused by a fault of the measuring chip is avoided. In addition, hardware cost can be further effectively reduced.

Inventors

LI, PENG
XU, Zhongli
LI, Yonghai

Assignees

Shenzhen First Union Technology Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20240704

Claims (11)

A method for measuring a number of puffs, applied to an aerosol generating device, wherein the aerosol generating device comprises an induction heater assembly and a power supply; the induction heater assembly comprises an induction coil and a susceptor, the induction coil is configured to generate a changing magnetic field when a changing current flows therethrough, and the susceptor is configured to heat when penetrated by the changing magnetic field generated by the induction coil, to heat an aerosol generating substrate to generate an aerosol; and the power supply is used for providing energy for the induction heater assembly; and the method comprises: obtaining coil voltages of the induction coil; and determining the number of puffs of the aerosol generating device according to the coil voltages.
The method according to claim 1, wherein the determining the number of puffs of the aerosol generating device according to the coil voltages comprises: determining, according to the coil voltages, a falling value interval of the coil voltages; determining a slope of the falling value interval; and determining the number of puffs according to the slope of the falling value interval.
The method according to claim 2, wherein the determining, according to the coil voltages, a falling value interval of the coil voltages comprises: determining duration of the falling value interval; and determining, according to the coil voltages and the duration of the falling value interval, the falling value interval of the coil voltages.
The method according to claim 3, wherein the duration of the falling value interval of the coil voltages is 2s or within.
The method according to claim 2, wherein the determining, according to the coil voltages, a falling value interval of the coil voltages comprises: determining that each coil voltage is in a falling process; dividing the coil voltage in the falling process into a plurality of falling sub-intervals according to a preset time threshold; determining slopes of the falling sub-intervals; and determining to keep coil voltages of the falling sub-intervals according to the slopes of the falling sub-intervals, to form the falling value interval.
The method according to claim 5, wherein the determining to keep coil voltages of the falling sub-intervals according to the slopes of the falling sub-intervals, to form the falling value interval comprises: determining whether the slope of each falling sub-interval satisfies a preset first slope threshold; keeping the coil voltage of the falling sub-interval if the slope is greater than or equal to the preset first slope threshold, to form the falling value interval; and discarding the coil voltage of the falling sub-interval if the slope is less than the preset first slope threshold.
The method according to any one of claims 2 to 6, wherein the determining the number of puffs according to the slope of the falling value interval comprises: determining whether the slope satisfies a preset second slope threshold; and determining that a puff action exists in the falling value interval and increasing the number of puffs by one if the slope is greater than or equal to the preset second slope threshold.
The method according to any one of claims 2 to 7, further comprising: classifying the puff action by degree according to the slope of the falling value interval.
The method according to claim 8, wherein the classifying the puff by degree according to the slope of the falling value interval comprises: determining that a degree of the puff action is deep when the slope is greater than or equal to a first preset puff threshold; determining that a degree of the puff action is normal when the slope is greater than or equal to a second preset puff threshold and is less than the first preset puff threshold; and determining that a degree of the puff action is light when the slope is less than the second preset puff threshold.
The method according to claim 1, wherein the obtaining coil voltages of the induction coil comprises: collecting coil voltages of the induction coil; and performing filtering on the coil voltages by a moving average filtering method.
An aerosol generating device, comprising: an induction heater assembly, wherein the induction heater assembly comprises an induction coil and a susceptor, the induction coil is configured to generate a changing magnetic field when a changing current flows therethrough, and the susceptor is configured to heat when penetrated by the changing magnetic field generated by the induction coil, to heat an aerosol generating substrate to generate an aerosol; a power supply used for providing energy for the induction heater assembly; and a controller, wherein the controller is connected to the induction heater assembly and the power supply, and is used for performing the method for measuring a number of puffs according to any one of claims 1 to 10.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present disclosure claims the priority to Chinese Patent Application No. 202310947315.6 filed with the Chinese Patent Office on July 28, 2023 and entitled "Method for Measuring Number of Puffs and Aerosol Generating Device", which is incorporated herein in its entirety by reference. TECHNICAL FIELD The present disclosure relates to the technical field of electronic atomization, and in particular, to a method for measuring a number of puffs and an aerosol generating device. BACKGROUND An aerosol generating device uses a heater to heat and bake an aerosol generating substrate, and generates aerosols for users. The aerosol generating substrate can release a volatile compound that can generate aerosols. This volatile compound can be released by heating the aerosol generating substrate. The number of aerosol generating materials in the aerosol generating substrate is limited. With an increase in the number of puffs, fewer and fewer aerosols will be produced, resulting in a blander taste. As a result, by measuring the number of puffs of the aerosol generating substrate, energy can be quickly replenished, and sufficient aerosols and better tastes are guaranteed. In some solutions known to the inventor of the present disclosure, the number of puffs is measured by a measuring chip. However, this method increases the hardware cost with a high failure rate. SUMMARY In view of this, some embodiments of the present disclosure provide a method for measuring a number of puffs and an aerosol generating device, which can accurately measure the number of puffs while saving cost. In a first aspect, some embodiments of the present disclosure provide a method for measuring a number of puffs. The method is applied to an aerosol generating device, where the aerosol generating device includes an induction heater assembly and a power supply; the induction heater assembly includes an induction coil and a susceptor, the induction coil is configured to generate a changing magnetic field when a changing current flows therethrough, and the susceptor is configured to heat when penetrated by the changing magnetic field generated by the induction coil, to heat an aerosol generating substrate to generate an aerosol; and the power supply is used for providing energy for the induction heater assembly; and the method includes: obtaining coil voltages of the induction coil; anddetermining the number of puffs of the aerosol generating device according to the coil voltages. In some embodiments, the determining the number of puffs of the aerosol generating device according to the coil voltages includes: determining, according to the coil voltages, a falling value interval of the coil voltages;determining a slope of the falling value interval; anddetermining the number of puffs according to the slope of the falling value interval. In some embodiments, the determining, according to the coil voltages, a falling value interval of the coil voltages includes: determining duration of the falling value interval; anddetermining, according to the coil voltages and the duration of the falling value interval, the falling value interval of the coil voltages. In some embodiments, the duration of the falling value interval of the coil voltages is 2s or within. In some embodiments, the determining, according to the coil voltages, a falling value interval of the coil voltages includes: determining that each coil voltage is in a falling process;dividing the coil voltage in the falling process into a plurality of falling sub-intervals according to a preset time threshold;determining slopes of the falling sub-intervals; anddetermining to keep coil voltages of the falling sub-intervals according to the slopes of the falling sub-intervals, to form the falling value interval. In some embodiments, the determining to keep coil voltages of the falling sub-intervals according to the slopes of the falling sub-intervals, to form the falling value interval includes: determining whether the slope of each falling sub-interval satisfies a preset first slope threshold;keeping the coil voltage of the falling sub-interval if the slope is greater than or equal to the preset first slope threshold, to form the falling value interval; anddiscarding the coil voltage of the falling sub-interval if the slope is less than the preset first slope threshold. In some embodiments, the determining the number of puffs according to the slope of the falling value interval includes: determining whether the slope satisfies a preset second slope threshold; anddetermining that a puff action exists in the falling value interval and increasing the number of puffs by one if the slope is greater than or equal to the preset second slope threshold. In some embodiments, the method further includes: classifying the puff action by degree according to the slope of the falling value interval. In some embodiments, the classifying the puff by degree according to the slope