US Patent 10349792 Hand drying apparatus

A hand dryer that includes a capacitance-detection-type proximity sensor structure that detects a capacitance generated in a capacitance detection electrode to detect a presence or absence of an object to be detected, includes a plurality of capacitance-detection-type proximity sensor structures. While one of the capacitance-detection-type proximity sensor structures is in operation, an operation of at least another of the capacitance-detection-type proximity sensor structures is stopped to operate the capacitance-detection-type proximity sensor structures during different periods of time.