Combined system of service water heating and heating medium for domestic heating

摘要

The combined system (21) comprises at least two independent heating medium sources, such as a boiler unit (1) and/or a solar panel system (12) or a heat pump and the like, by means of primary circuits (24, 25) connected in parallel to the combined system (21) by means of a plate heat exchanger (22), and in parallel connected circuits collecting heat from the heating medium, on one hand for the domestic heating system circuit (11) and on the other hand, the circuit (23) for heating of service water with the interface through its own heat exchanger (8), while the said parallel circuits (23, 11, 24, 25 ), including their backflow sections, are interconnected via plate heat exchangers (8, 22) to concentrate in the combined system block (21 ) and are mutually variously switchable, in particular depending on the different levels of achieved temperatures of at least two stratified layers of heating media in an external heat storage tank (20), connected in parallel by means of a differential connection of a three- way valve group (16, 17, 18, 19) with inputs/outputs to circuits (23, 11, 24, 25), preferably through the input/output (27) in the external tank (20) for the domestic heating circuit (11) and through the input/output (26) in the external tank (20) for heating of service water, primarily to the heating circuit (23) of the service water from the top layer of the heating medium by means of mixing three-way valves (17, 7) for differential switching either to a service water Heating circuit (23) not exceeding 55° C, or to a domestic heating circuit (11) with a temperature even above 55° C.