Electrolux Home Products Corporation N.v.

Electrolux Appliances Aktiebolag

Christian Montebello

Roberto Ragogna

Elena Pesavento

Francesco Cavarretta

Alessandro Vian

Paolo Ros

Walter Cerrato

Maura Pasquotti

Stefano Zandona′

Vincenzo Aprea

Stefano Zandona'

Alberto Lazzarin

A heat pump laundry dryer or a heat pump washing machine having a drying function, includes a control unit controlling an operation of the laundry treatment apparatus. A laundry treatment chamber treats laundry using process air circulated in a process air circuit. A heat pump system has a refrigerant loop in which refrigerant fluid is circulated through a first and a second heat exchanger. A compressor circulates the refrigerant fluid through the refrigerant loop, and a cooling fan unit cools the compressor. During the operation, a conveyance capacity of the cooling fan unit is varied. A detector unit detects an operation parameter indicating a state of at least one electronic board. A method of operation includes operating the cooling fan unit based upon the electronic board operation parameter, and controlling the compressor operation output based upon the electronic board operation parameter, wherein the compressor is a variable speed compressor.

Heat pump laundry treatment apparatus and method of operating a heat pump laundry treatment apparatus

A method of operating a laundry treatment apparatus, in particular a washing machine, a laundry dryer, a heat pump laundry dryer or a washing machine having a drying function, is provided. The apparatus includes a control unit controlling the operation of the treatment apparatus, a laundry treatment chamber for treating laundry, a detector unit for detecting at least one operation parameter (T_inv) of the treatment apparatus, and a first variable speed motor unit adapted at least to drive the treatment chamber, and/or a compressor having a second variable speed motor unit for circulating a refrigerant fluid through a refrigerant loop of the laundry treatment apparatus. The method includes selecting a predetermined power supply modulation mode for operating at least one of the first and second motor unit in dependency of the at least one detected operation parameter (T_inv), and operating at least one of the first and second motor units in an operating cycle by applying or executing the selected predetermined power supply modulation mode.

Method of operating a variable speed motor in a laundry treatment apparatus

Growing community of inventors

San Giovanni Teatino, Italy

Christian Montebello