Service water heating unit

摘要

The invention relates to a service water heating unit (2) comprising at least one heat exchanger (6), which comprises a first flow path (10) for a heating medium and a second flow path (12) for service water to be heated, a cold water line (DCW) and a circulation line (90) for heated service water opening into a junction (97) in an inlet line to the second flow path (12) of the heat exchanger (6), and comprising a control unit (101) for controlling the heating of service water, the control unit (101) being designed for detection of a service water request, wherein the control unit (101) is designed for evaluation of the output signal of a temperature sensor (96) which is arranged in the vicinity of the junction (97), but at a distance therefrom, in the cold water line (DCW).

主权项

1. A service water heating unit (2), comprising:
at least one heat exchanger (6), which comprises a first flow path (10) for a heating medium and a second flow path (12) for service water to be heated; a cold water line (DCW), opening into a junction (97) in an inlet line to the second flow path (12) of the heat exchanger (6); a circulation line (90) for heated service water, opening into the junction (97) in the inlet line to the second flow path (12) of the heat exchanger (6); a first temperature sensor (96), providing an output signal, arranged in the vicinity of the junction (97), but at a distance therefrom in the cold water line (DCW), the first temperature sensor (96) being arranged in a position in the cold water line (DCW) to detect a temperature in the cold water line (DCW), wherein the temperature in the circulation line (90) affects the temperature in the cold water line (DCW); and a control unit (101) configured to control the heating of service water, evaluate the output signal of the first temperature sensor (96) and detect a service water request solely on the basis of a temperature change indicated by the evaluated output signal received from the first temperature sensor.