Drum type washing machine with laundry weight detecting means

A drum type washing machine comprising:

• a drum for accommodating laundry;
• a variable speed electric motor for rotating the drum;
• rotational speed detecting means for detecting a rotational speed of the drum or the motor;
• rise time detecting means for detecting a rise time in a case where the drum or the motor is accelerated from a first predetermined rotational speed to a second predetermined rotational speed while a predetermined constant power is being supplied to the motor;
• fall time detecting means for detecting a fall time in a case where the drum or the motor is decelerated from a third predetermined rotational speed to a fourth predetermined rotational speed while the motor is in a free running state;
• weight detecting means for detecting a weight of the laundry in the drum on the basis of results of detection by the rise and fall time detecting means;
• and
• balance detecting means for detecting a balance of the laundry in the drum,
• wherein the weight detecting means compensates a result of detection according to a result of detection by the balance detecting means.