Loading patent…
AssigneeElectrolux Home Products, Inc.
InventorsFrancesco Cavarretta, Roberto Ragogna, Maura Pasquotti, Stefano Zandona, Elena Pesavento, Christian Montebello
Estimating the term…
The invention relates to a heat pump laundry treatment apparatus, in particular a heat pump laundry dryer or a heat pump washing machine having drying function, and to a method of operating such a heat pump laundry treatment apparatus. The laundry treatment apparatus comprises a control unit (51) controlling the operation of the laundry treatment apparatus, a laundry treatment chamber for treating laundry using process air, a process air circuit for circulating the process air, a heat pump system having a refrigerant loop (6) in which the refrigerant fluid is circulated through a first and a second heat exchanger, a compressor (14) for circulating the refrigerant fluid through the refrigerant loop (6), and a cooling fan unit (53) for cooling the compressor (14). During the operation the conveyance capacity of the cooling fan unit (53) is varied, and a detector unit (60) for detecting an operation parameter indicates a state of an electronic board (52). The method comprises operating the cooling fan unit (53) in dependency of the electronic board operation parameter, and/or controlling the compressor operation output in dependency of the electronic board operation parameter, wherein the compressor (14) is a variable speed compressor.
Method of operating a heat pump laundry treatment apparatus, in particular a heat pump laundry dryer (2) or a heat pump washing machine having drying function, wherein the laundry treatment apparatus comprises:
Method according to any of the preceding claims, wherein the laundry treatment apparatus (2) comprises a first electronic board (52) and a second electronic board, wherein each board comprises a temperature sensor (60) for detecting a board temperature (T_inv) as an electronic board temperature.
Method according to any of the preceding claims,
Method according to any of the preceding claims, wherein the electronic board is at least one of:
Method according to any of the preceding claims, wherein the electronic board is or comprises an inverter electronic (52) supplying controlled current to the motor.
Method according to any of the preceding claims,
Method according to any of the preceding claims, wherein during the operation of the laundry treatment apparatus (2) the method further comprises additionally varying the conveyance capacity (C) of the cooling fan unit (53) in dependency of at least one of the following input variables:
Method according to any of the preceding claims, wherein the electronic board (52) for controlling the compressor (14) is arranged in proximity of the compressor (14) or in proximity of the cooling fan unit (53).
Method according to any of the preceding claims, wherein the compressor (14) is a variable speed compressor, the electronic board operation parameter is a temperature (T_inv) detected at the electronic board and the compressor output (OUT_comp, RPM_comp) is decreased in response an increase of the electronic board temperature (T_inv).
Method according to any of the preceding claims, wherein, when the operation of the cooling fan unit (53) is operated in dependency of the electronic board operation parameter (T_inv), the compressor operation output (OUT_comp, RPM_comp) of the variable speed compressor is increased.
Method according to any of the preceding claims, wherein the method operates the cooling fan unit (53) to reach a minimum conveyance capacity value even if the heat pump system (4) does not require compressor cooling.
Heat pump laundry treatment apparatus, in particular a heat pump laundry dryer (2) or a heat pump washing machine having drying function, wherein the laundry treatment apparatus (2) comprises:
Dependencies are inferred from the claim text.