Patent ID: 6223698
Filing Date: 2001-05-01
Classification: F24H

Abstract:
A device for producing hot water, allowing to produce heat transfers by direct contact, with discharge of smoke gases with a reduced CO ratio, this device comprising an enclosure (1) provided, in the upper part thereof, with smoke gas discharge means (5), a combustion chamber consisting of at least one sealed container referred to as hearth-container (14), extending along a substantially horizontal axis and arranged in a water section (12) situated in the lower part of the enclosure, a burner (13) associated with each hearth-containing and arranged at one end thereof to produce a rapid combustion developing along the horizontal axis of said hearth-container over the length thereof, water spraying means (10) associated with cold water supply means (8) and arranged to shower water in the upper part of the enclosure, hot water extraction means (17-19) arranged in the lower part of the enclosure, said device being characterized in that:each hearth-container is extended, at its end (14a) on the opposite side from the burner, by a smoke gas diffuser (15) comprising an upstream portion (15a) connected to said end on the opposite side from the burner and a diffusion portion (15b) extending in enclosure (1) above hearth-container (14) along a substantially horizontal axis,diffusion portion (15b) of the diffuser comprises smoke gas discharge ports (16) provided in the lower half of the section of said portion (15b) so as to allow to establish an overpressure inside the diffuser and the hearth-container and to prevent any water and steam entry in order to obtain a dry complete combustion inside said hearth-container,water level control means (9, 19, 21, 22 and 23) being associated with water section (12) in order to provide, in said section, such a water level H that the hearth-container(s) are immersed in the water of said section and that diffusion portion (15b) of the smoke gas diffuser remains constantly above said water level,wherein the control means comprise solenoid valves (9, 19, 21) mounted, on the one hand, on cold water supply means (8) and, on the other hand, on hot water extraction means (17, 20), and a water pressure detector (22) arranged at the base of water section (12) for controlling said solenoid valves in order to adjust the supply and extraction rates.