| 摘要 |
PROBLEM TO BE SOLVED: To prevent deterioration of noise of a washing machine due to resonance of vibration generated from cooling blades incorporated into a motor with a structure of the washing machine in each of washing and dehydration processes.SOLUTION: A drum type washing machine includes the motor for driving a drum and a plurality of sheets of cooling blades 54 of the motor to be coaxial with an output shaft 51 of the motor in the motor. A control device includes means for varying the number of rotation of the motor and operates the washing machine in the number of rotation of the motor in which vibration generated from the cooling blades 54 of the motor does not resonate with a washing machine body in the washing and dehydration processes to prevent deterioration of noise of the washing machine. |
