Condenser dryer having a heat pump, and method for operating the same

A condenser dryer, comprising:

• a drying chamber for items to be dried;
• a process-air circuit including a fan;
• and
• a heat pump in which a refrigerant circulates, said heat pump having an evaporator and a condenser, said evaporator or said condenser, or both, being a heat exchanger having level surfaces and including at least one endlessly folded, flattened tube to form a plurality of rows of meander stacks in laterally offset relationship.

A method for operating a condenser dryer having a drying chamber for items requiring to be dried, a process-air circuit, a fan in the process-air circuit, and a heat pump in which a refrigerant circulates, the heat pump having an evaporator, a compressor, a throttle, and a condenser, the evaporator and/or condenser being a heat exchanger, said method comprising the steps of:

• providing level surfaces on the heat exchanger and at least one endlessly folded, flattened tube that forms a plurality of rows of meander stacks in laterally offset relationship;
• ducting a refrigerant through the flattened tube;
• and
• ducting the process air over the flattened tube so as to cause an exchange of heat between the refrigerant and the process air.