| 摘要 |
The object of the present invention is a by-pass (5) installable in a heat exchanger (1) of a thermal generator for room heating and/or for the production of domestic hot water, in particular of the condensation type, apt to place in direct communication the hot chamber (21) of the sensitive portion (SS) of said heat exchanger (1) with the cold chamber (22) of the condensing portion (SC) of said exchanger (1). The by-pass (5) allows a portion P of the hot combustion fumes F generated therein by a burner to be withdrawn from said sensitive portion (SS) for mixing them with the cold fumes F-P, escaping from said condensing portion (SC), cold by the effect of the thermal exchange with said heat exchanger (1). Said mixing brings the combustion fumes F escaping from said heat exchanger (1) to a sufficiently high temperature to prevent the condensation thereof in the discharge system to the atmosphere. |
