Economizer device for exploiting the thermal output of heating installations

An economizer device for fully exploiting the thermal output of central heating installations, the latter incorporating a boiler having water-circulation pipes between a cold-water feeding point and hot-water utilization points, employing both heating radiators and hot-water feeding devices of the type including:

• an adjustable heat source working intermittently and consisting of a sprayer for fuel oil, releasing hot combustion gases;
• a chamber disposed in proximity to said heat source for collecting said gases, said chamber being fitted with pipes within which latter water circulates and flows towards the utilization points;
• the economizer device being formed of a long nest of continuously connected gilled tubes disposed in said chamber for bypassing said water-circulation pipes;
• circulation water inlet and outlet pipes each respectively connected to associated inlet and outlet tubes of said gilled tubes for directing water into and out of said economizer;
• refractory material means encapsultating said tubes and filling the whole available volume of said chamber, in such a way that the most part of the thermal energy contained in the hot combustion gases, released by said sprayer is stored in said mass of said refractory material means before those gases leave said chamber then they are progressively transferred to the water flowing in said gilled tubes, so that this thermal energy is brought by the water flowing in said gilled tubes to the water flowing in said circulation pipes, leading to said utilization points, as a function of the consumption at these points, while said sprayer works with various outputs, after said sprayer has come to a total stoppage.