| 摘要 |
A blow device for rear view mirror of a vehicle includes a control circuit (1), an air compressor (2), an air duct (3) and a blow nozzle (4). The operation of the air compressor (2) is controlled by the control circuit (1). The air outlet of the air compressor (2) is connected to the blow nozzle (4) via the air duct (3). The blow nozzle (4) is mounted on the vehicle facing the rear view mirror (10) and the side window (20) for removing the fog and water droplets on there. A sensor (7), as well as a compression frequency adjuster (6) and/or an air exhausting frequency adjuster (9) are added to the blow device. The sensor (7) is used to detect the swing frequency of the wiper (8) as a detected signal. The control circuit (1) processes the detected signal to generate an adjusting signal and then transmits the adjusting signal to the compression frequency adjuster (6) and/or the air exhausting frequency adjuster (9) respectively. The compression frequency of the air compressor (2) is controlled by the compression frequency adjuster (6) based on the adjusting signal, and the air exhausting frequency of the blow nozzle (4) is controlled by the air exhausting frequency adjuster (9) also based on the adjusting signal, so that the blow amount can be automatically adjusted depending on the precipitation rain fall. |
