HEATING DEVICE Russian patent published in 1997 - IPC

FIELD: hydrodynamic cavitation-type heaters for off-line heating and hot-water supply systems. SUBSTANCE: heating device has delivery and return lines of which first one is made in the form of at least two parallel branches 2 and 3 each provided with heat generator of hydrodynamic cavitation type. Delivery branch 2 and return line 1 are interconnected through pump 4 and also connected to delivery and return lines of heat user, respectively, to form external circulation loop. Branch 2 is connected to return line 1 through crossover piping 5 incorporating control valves 6, 7 with branch 3 connected inbetween to piping 5 to form internal circulating loop. EFFECT: improved efficiency of coolant heating to desired temperature due to optimal distribution of heated medium flow rates between loops. 3 cl, 3 dwg