| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum cleaner that can be operated continuously while preventing smoking and ignition of an electric blower based on the friction between a commutator and a brush.SOLUTION: A vacuum cleaner 1 includes: an electric blower 7 having a commutator 47 and a brush 51; a spark detector 58 for detecting a spark generated by the friction between the commutator 47 and the brush 51; and a body control part 9 that calculates a prediction next time value from a difference between a preceding value and a value this time that sample the result of the detection by the spark detector 58, and, if an absolute value of a difference between the prediction next time value and the actual next time value that samples the result of the detection by the spark detector 58 is greater than a specified value Is determined beforehand, gradually reduces the input of the electric blower 7 until the absolute value reaches the specified value Is or less. |
