Patent ID: 7628830

Claim:
An electric vacuum cleaner, comprising: a first dust separation device configured to separate dust sucked by a negative pressure of an electric fan; a first dust collection section for collecting the dust separated by the first dust separation device; a second dust separation device configured to separate the dust which has passed through the first dust separation device; a dust removing device configured to remove the dust adhering to the second dust separation device; a second dust collection section positioned on an upstream side of the second dust separation device and provided below the second dust separation device, for accumulating the dust removed by the dust removing device; a partition wall for partitioning the first dust collection section from the second dust collection section; and an introduction opening for introducing the dust removed by the dust removing device into the second dust collection section, wherein the partition wall is provided with a communication opening for communicating the first dust collection section to the second dust collection section, wherein the partition wall is provided with an opening and closing member for closing either of the introduction opening or the communication opening, the opening and closing member being rotatable between closing the introduction opening and closing the communication opening, and wherein the opening and closing member closes the introduction opening due to the negative pressure caused by driving the electric fan and closes the communication opening by its own weight when the electric fan is not driven.