Patent ID: 9730565
Date: 2017-08-15
CPC Classifications: A47L

Claim:
1. A vacuum device, comprising: a device body, further having a duct outlet and a fan outlet; a dust-collecting box, located inside the device body, connected spatially to the duct outlet; a fan, located inside the device body at a place beside the dust-collecting box, connected spatially to the fan outlet; and a detection unit, located close to the fan outlet, further including sensor and a rotation assembly, wherein the sensor further has an infrared-emitting component and an infrared-receiving component, wherein the rotation assembly is able to pass rotationally through a space between the infrared-emitting component and the infrared-receiving component, wherein the infrared-emitting component is to emit an infrared to the infrared-receiving component for detecting the rotation assembly; wherein, the fan is to provide an airflow to exhaust through the fan outlet by passing through the detection unit, wherein the rotation assembly is rotated according to the speed of the airflow of the fan.