Matthew Vaughan,Brett Burton,David Bartholomew,Trevor Tallos,David Chase,Bryan D. Balaban,Jackson Brengman
申请号：
US16774702
公开号：
US20200237948A1
申请日:
2020.01.28
申请国别(地区):
US
年份:
2020
代理人:
摘要：
An air freshener includes an electrically powered fragrance dispenser having a connector configured to connect with a fragrance container. A light source transmits a light beam into the fragrance container at a non-normal angle of incidence respective to a wall of the fragrance container, and a photodetector is positioned in the path of one of (i) the light beam after passing through the fragrance container when the light beam is not refracted by fragrance liquid in the fragrance container and (ii) the light beam after passing through the fragrance container when the light beam is refracted by fragrance liquid in the fragrance container. In another approach, the sensor for detecting empty includes a vibrator and a vibration sensor, and an electronic processor is programmed to determine whether the fragrance container is empty of fragrance liquid based on the detected vibration of the fragrance container.
