Global Patent Index - EP 3919671 A1

EP 3919671 A1 20211208 - A METHOD FOR OPERATING A LAUNDRY DRYING MACHINE EQUIPPED WITH A HEAT PUMP SYSTEM AND A LAUNDRY DRYING MACHINE IMPLEMENTING SAID METHOD

Title (en)

A METHOD FOR OPERATING A LAUNDRY DRYING MACHINE EQUIPPED WITH A HEAT PUMP SYSTEM AND A LAUNDRY DRYING MACHINE IMPLEMENTING SAID METHOD

Title (de)

VERFAHREN ZUM BETRIEB EINER WÄSCHETROCKNUNGSMASCHINE, DIE MIT EINEM WÄRMEPUMPENSYSTEM AUSGESTATTET IST, UND WÄSCHETROCKNUNGSMASCHINE ZUR IMPLEMENTIERUNG DES BESAGTEN VERFAHRENS

Title (fr)

PROCÉDÉ DE FONCTIONNEMENT D'UN SÈCHE-LINGE DOTÉ D'UN SYSTÈME DE POMPE À CHALEUR ET SÈCHE-LINGE METTANT EN OEUVRE CE PROCÉDÉ

Publication

EP 3919671 A1 20211208 (EN)

Application

EP 20178479 A 20200605

Priority

EP 20178479 A 20200605

Abstract (en)

The invention relates to a method for controlling a laundry drying machine (1) equipped with a heat pump system (50) including a compressor (52) and equipped with at least a passive switching device (70), not controllable by a control unit (UC1), adapted to cut the power supplied to the compressor (52) when predetermined operative parameters thresholds are exceeded. The machine (1) further comprises at least one compressor cooling fan (60) and at least one temperature sensor (80, 85). The method comprises the steps of:activating the heat pump system (50) by switching on said compressor (52);detecting a machine temperature (Tm) related to temperature conditions of the laundry drying machine (1);detecting an electric parameter (Vd) related to the electric current absorbed by said compressor (52);detecting a temperature (Tr) related to the compressor (52);switching on said cooling fan (60) if said temperature (Tr) related to the compressor (52) is above one switch ON threshold temperature (Fan_Ton) selected among predetermined threshold temperatures (Fan_Ton);switching off said cooling fan (60) if said temperature (Tr) related to the compressor (52) is below one switch OFF threshold temperature (Fan_Toff) selected among predetermined threshold temperatures (Fan_Toff);maintaining said compressor (52) switched on or switching on said compressor (52) if said temperature (Tr) related to the compressor (52) is below one switch ON/OFF threshold temperature (Comp_Ton/off) among predetermined threshold temperatures (Comp_Ton/off);switching off said compressor (52) if said temperature related (Tr) to the compressor (52) is above, or equal to, one switch ON/OFF threshold temperature (Comp_Ton/off) among predetermined threshold temperatures (Comp_Ton/off).The predetermined threshold temperatures (Fan_Ton, Fan_Ton, Comp_Ton/off) are defined on the base of ranges of the machine temperature (Tm) and on the base of ranges of said electric parameter (Vd).

IPC 8 full level

D06F 58/50 (2020.01); D06F 34/08 (2020.01); D06F 58/20 (2006.01); D06F 103/32 (2020.01); D06F 103/48 (2020.01); D06F 105/26 (2020.01); D06F 105/52 (2020.01)

CPC (source: EP)

D06F 58/50 (2020.02); D06F 58/206 (2013.01); D06F 58/46 (2020.02); D06F 2103/00 (2020.02); D06F 2103/32 (2020.02); D06F 2103/48 (2020.02); D06F 2105/26 (2020.02); D06F 2105/30 (2020.02); D06F 2105/52 (2020.02)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3919671 A1 20211208; EP 3919671 B1 20240508; WO 2021244876 A1 20211209

DOCDB simple family (application)

EP 20178479 A 20200605; EP 2021063633 W 20210521