Electrically-operated Aerosol-generating Device Technical Implementation Elements Of A Device For Detecting Airflow in An Electrically-operated Aerosol-generating Device

Technical implementation elements:

5. According to the present invention, there is provided an electrically operated aerosol generating device for generating an aerosol, in particular an electrically operated aerosol for generating an aerosol by releasing an aerosol-forming substrate into an airflow Generate device. The device includes an air path extending through the device and configured to support airflow in the device. The device further includes a sound-generating member arranged in fluid communication with the air path and configured to generate sound caused by airflow through the sound-generating member when the device is in use when a user performs suction. Additionally, the device includes a puff detector including a vibration sensor. The vibration sensor is fluidly separated from the air path at least within the device and is configured to detect sound propagating from the sound generating member to the vibration sensor. Thus, detecting the sound propagating from the sound generating member to the vibration sensor may allow the detection of airflow through the device, which airflow is indicative of a user's puff.

6. In accordance with the present invention, it has been recognized that an indication of a user to puff can be reliably detected by using the airflow to generate air vibrations (sound) or vibrations of at least a part of the device (which propagate and thus can be detected remotely by a vibration sensor)

air flow, specifically the change in air flow. Due to the remote detectability of the propagating vibration, the vibration sensor may be arranged fluidly separated from the air path in the device. Advantageously, the fluidly separated arrangement of the vibration sensors makes airflow and suction detection less error-prone and therefore more reliable. Furthermore, it has been recognized that the use of sound generating members can act as an amplifier for the airflow through the air path as it generates vibrations that are transmitted to remote vibration sensors.

7. As used herein, the term "sound" or "propagating vibration" basically refers to mechanical sound waves propagating through a gaseous, fluid or solid medium, in particular air or a structural component (solid matter) of an aerosol generating device. The term "sonic wave" refers to a type of energy propagation by means of adiabatic compression and decompression of a medium (air or solid matter of a device, respectively).

8. The term "sound wave" or "sound" may refer to a sound wave or sound that a human perceives through its hearing, in particular perceivable/audible through hearing. The frequencies that humans can hear are usually in the range of 20 hertz (hz) to 20.000 hertz (hz)

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