HEAT-EXCHANGE UNIT Russian patent published in 2002 - IPC

FIELD: heating various media; heat supply systems. SUBSTANCE: proposed unit includes hot-water boiler with furnace, burner and fire tubes arranged in its cavity. Double-circuit heat exchanger is located in boiler cavity; one circuit of this heat exchanger is connected to water line of heating system and other circuit is connected to hot water preparation line; it consists in profiled plates interconnected by means of threaded bushes and secured on flat walls by means of contact welding forming collector and circulating passages; fire tubes are provided with turbulators, burner is mounted tangentially; besides that, electric heaters may be mounted in boiler base. EFFECT: reduced overall dimensions and increased capacity. 6 dwg