| 摘要 |
<p>PURPOSE: An electric vacuum cleaner is provided to collect solid bodies which are heavier than dust into the main body of a vacuum cleaner by controlling the suction force of an electric blower using the speed changing unit of the electric blower. CONSTITUTION: An electric vacuum cleaner comprises a dust chamber (5) and an absorption chamber (6). A filter is equipped inside the dust chamber which filters solid bodies which flows through an inlet (7). The absorption chamber is formed with a first electronic blower (110) and a second motor (20). At least one among a first motor (10) and the second motor is formed with an electronic clutch which stops the rotation of a rotary shaft in the motor when the operation of the motor is stopped. One motor among the first and second motors which is operated after the other motor is a rotary motor to rotate the rotary shaft of the motor in normal and reverse directions. The case (22) or the stator (23) of the second motor is fixed to a main body (4).</p> |
