Method for controlling a laundry drying machine with heat pump system and laundry drying machine controlled by such method

Abstract

A laundry drying machine with a heat pump system comprises a process air circuit including a rotating drum, a blower and a heater, a refrigerant circuit including a compressor, a condenser, an expansion device, an evaporator, the condenser and evaporator being in heat exchange relationship with the process air circuit, an auxiliary condenser cooled by an air flow driven by a fan, and at least two temperature sensors placed in the process air circuit and/or in the refrigerant circuit. A method for controlling the laundry drying machine includes receiving an input indicating a desired behavior of the laundry drying machine selected from the group consisting of optimized use of energy, overall drying time and fabric care, and controlling components of the machine according to signals from the two temperature sensors and according to the desired behavior.

1 . A method for controlling a laundry drying machine with a heat pump system comprising a process air circuit including a rotating drum, a blower and a heater, a refrigerant circuit including a compressor, a condenser, an expansion device, an evaporator, the condenser and evaporator being in heat exchange relationship with the process air circuit, an auxiliary condenser cooled by an air flow driven by a fan, and at least two temperature sensors placed in the process air circuit and/or in the refrigerant circuit, the method comprising:
 receiving an input indicating a desired behavior of the laundry drying machine selected from the group consisting of optimized use of energy, overall drying time and fabric care, and   controlling components of the laundry drying machine according to signals from the two temperature sensors and according to the desired behavior.   
     
     
         2 . A method according to  claim 1 , wherein at least two components of the laundry drying machine are controlled. 
     
     
         3 . A method according to  claim 2 , wherein the at least two components to be controlled are selected from the group consisting of blower, heater, compressor and fan. 
     
     
         4 . A laundry drying machine comprising:
 a heat pump system comprising a process air circuit including a rotating drum, a blower and a heater,   a refrigerant circuit including a compressor, a condenser, an expansion device, an evaporator, the condenser and evaporator being in heat exchange relationship with the process air circuit, an auxiliary condenser cooled by an air flow driven by a fan,   at least two temperature sensors placed in the process air circuit and/or in the refrigerant circuit,   a user interface configured to allow a user to choose a desired behavior of the laundry drying machine selected from the group consisting of optimized use of energy, overall drying time and fabric care, and   a control unit coupled to the user interface and configured to control components of the laundry drying machine according to signals from the two temperature sensors and according to the desired behavior.   
     
     
         5 . A laundry drying machine according to  claim 4 , wherein at least two of the components are adapted to be controlled. 
     
     
         6 . A laundry machine according to  claim 5 , wherein the at least two components to be controlled are selected from the group consisting of the blower, the heater, the compressor, and the fan.