Vacuum cleaner and method of determining a kind of a surface of a floor being cleaned thereby.

摘要

A vacuum cleaner and method for determining a kind of a surface of a floor being cleaned by a vacuum cleaner wherein dust amount per unit interval is detected and dust detection change pattern is analyzed for determining a kind of surface of the floor. This analyzing is based on the tendency as follows: Smooth and carpet surfaces can be distinguished by dust detection pattern for an interval of several seconds. On the smooth surface, almost all of dust at one place is sucked for early stage of the interval. On the other hand, on a carpet floor, dust is sucked continuously. On a new carpet, many piles detach during sucking operation. Thus, if dust detection is continuous for over several seconds, the carpet can be determined that it is a new carpet.