A device, such as a fan, an air conditioner, a space heater, an air cleaning or filtration device, or an air freshener, includes an airflow generator 108 and an elongate plenum 110 configured to receive airflow generated by the airflow generator 108; An outlet (112, Fig. 2) extends along at least part of the plenum 110, such that the airflow passing through the plenum 110 exits the outlet (112, Fig. 2); The device includes at least one Helmholtz resonator 114 having an inlet port 116 and a cavity 118, the inlet port 116 being in fluid communication with the plenum 110 at a position that is on the other side of the outlet (112, Fig. 2) relative to the airflow generator 108; The plenum 110 and Helmholtz resonator 114 are arranged and configured to reduce the noise generated by device around at least one frequency while reducing the effect of the resonator 114 on airflow to the outlet.
Device with Helmholtz resonator
2023-08-09
Patent
Electronic Resource
English
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