Patent ID: 11946478
Assignee: DYSON TECHNOLOGY LIMITED
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 24:
25. A method of generating a display on a fan assembly
providing an indication of air quality, the method comprising:
providing the fan assembly, the fan assembly having a fan body, a motor-driven impeller housed within the fan body and arranged to generate an airflow, and a nozzle including a base surrounding an upper portion of the fan body and an air outlet arranged to emit the airflow from the fan assembly;
using a plurality of sensors positioned on the fan assembly to measure a value for each of a plurality of air quality characteristics;
using a processor to:
for each of the measured air quality characteristics, identify one of a corresponding set of intervals within which the measured value falls and select an air quality index value associated with the identified interval;
identify the highest of the selected air quality index values as a current overall air quality index value;
generate on a display positioned on the fan body and viewable through the base of the nozzle a time series plot of the current overall air quality index value and a number of preceding overall air quality index values; and
adjust an operating condition of the fan assembly either automatically based on the current overall air quality index value or in response to a user input on a user interface positioned on the fan assembly.