Structural unit, in particular heating pump, comprising a heatable tube section for a water-conducting domestic appliance, and water-conducting domestic appliance comprising such a structural unit

A structural unit including a heating pump, said structural unit comprising:

• a tube section for a water-conducting household appliance, said tube section being configured such as to enable a liquid to flow through and to be heatable,
• a mechanical structure arranged in the tube section and configured to effect locally differing flow rates in the liquid,
• a first temperature measuring device arranged on an outer side of the tube section radially outside a region of lower flow rate, and
• a second temperature measuring device arranged on the outer side of the tube section radially outside a region of higher flow rate,
• wherein the mechanical structure is formed by a guide element that directs the liquid in an interior of the tube section,
• wherein the guide element includes guide blades arranged such as to effect locally varying flow rates of the liquid in the tube section, and
• wherein the guide blades extend each from a circle-cylindrical base element of the guide element in a component that extends both axially and radially outward, and further comprising an impeller wheel configured such as to enable flow of the liquid against the guide element, with the guide blades directing the liquid in a substantially spiral direction of flow.