Heat exchanger for heat accumulator

摘要

The heat exchanger has two parts, the first one (1) being arranged in the inlet area for a storage liquid (4) and the second one (2) in the outlet area. A primary liquid, which is not the storage liquid, first flows through the heat exchanger at the outlet area and then through the heat exchanger at the inlet. In this way, all the heat is displaced between the inlet and the outlet in a primary circuit. The thermosiphon flow of storage liquid also flows back due to the low flow of the primary circuit. The outlet heat exchanger is arranged inside a flow guide pipe (3) which leads directly to the inlet heat exchanger. A branch from the pipe connecting inlet and outlet leads to the cold water connection of a thermostatic mixing valve (6). The hot water connection of the valve is connected to the outlet (7) of the inlet heat exchanger so that the lower heat exchanger (2) is always being filled with cold water.