Patent ID: 9624619
Date: 2017-04-18
CPC Classifications: D06F

Claim:
1. A method of controlling a rotatable-drum laundry drier to dry delicate laundry in a drum of the rotatable-drum laundry drier; the method comprising the steps of: feeding drying air into the drum; rotating the drum at a variable rotation speed about an axis of rotation; rotating the drum at a first rotation speed higher than, or equal to, a rotation speed at which centrifugal acceleration of the inner surface of the drum equals gravitational acceleration, so that the laundry is pressed by centrifugal force against the inner surface of the drum and so prevented from sliding/tumbling inside drum; alternating first rotation cycles of said drum at said first rotation speed with one or more second rotation cycles of said drum at a not null second rotation speed lower than said first rotation speed and such that, at each second rotation cycle, at least part of the laundry slides/tumbles slowly inside the drum while remaining in contact with the inner surface of the drum and/or another part of the laundry contacting the drum; measuring the moisture in the laundry, in the course of one or more second rotation cycles of the drum at the second rotation speed, by means of moisture sensors connected to a stationary part of the casing of the rotatable-drum laundry drier and located so that, as the drum rotates, they come into contact with the laundry inside the drum, wherein said moisture sensors comprise at least two electrodes facing the internal of the drum; calculating, during the second rotation cycles of the drum at the second rotation speed, the moisture and the quantity/weight of the laundry; and calculating the drying cycle end time of the rotatable-drum laundry drier on the basis of the moisture and the quantity/weight of the laundry; wherein after calculating the drying cycle end time, the drum returns to said first rotation speed.