A HEAT EXCHANGER
The present invention relates to a heat exchanger for appliances with air flow, characterized by at least one humidity volume, at least one air inlet duct connected to the humidity volume, at least one air outlet duct connected to the humidity volume, at least one fan enabling air to be circulated from the humidity volume to the air inlet duct and therefrom to the air outlet duct, at least one condenser to heat the dry air entering the air outlet duct, at least one evaporator to dehumidify the humid air from the air inlet duct before it is introduced into the condenser, at least one upper region provided in the evaporator and consisting of fins, and at least one lower region provided in the evaporator and consisting of fins of a number higher than those of the upper region so as to have a fin arrangement denser than that of the upper region.