Electrolux Siegen Gmbh

Uwe Schwarzpaul

A refrigerating system is proposed which comprises a cooling circuit,for cooling a cooling room,the cooling circuit,comprising an evaporator,arranged in the cooling room,and passed by a coolant and the power to be supplied to the cooling circuit,being adjustable, a control device,for making available to the cooling circuit,a performance value stating the power to be supplied, a temperature sensor,for making available to the control device,a temperature measurement value essentially stating the temperature of the coolant in the evaporator,a clock,for making available to the control device,a predetermined first time interval and a pre-determined second time interval following the first time interval, wherein the control device,during the first time interval makes available a first performance value stating an essentially constant first power to be supplied and after the end of the first time interval makes available a second performance value stating a second power to be supplied which is greater than the first power to be supplied, wherein the control device,at the beginning of the second time interval detects a first temperature value and at the end of the second time interval detects a second temperature value and issues a defect signal when the absolute value of difference between the first and the second temperature values is less than a pre-determined value of difference.

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Siegen, Germany

Uwe Schwarzpaul