FIELD: heat exchange.
SUBSTANCE: invention relates to heat exchanger (1) for heating fresh water using heat from wastewater in a shower or bathtub. Heat exchanger has drain pan (3), heat exchanger unit (2) which is arranged in drain pan (3), and distributing element (42) for distributing draining wastewater over heat exchanger unit (2). Heat exchanger unit (2) has multiple tube portions (24) which follow one another sequentially and are connected to one another by diverting portions (25). Each two horizontally running tube portions (24), which is to say tube portions (24) which follow one another and which are thus connected by a deflecting portion are arranged one over the other, and wastewater which is dripping or flowing down is sprinkled on or flows over the tube portions one after the other.
EFFECT: invention is aimed at increasing the efficiency of the heat exchanger.
22 cl, 31 dwg
