| 摘要 |
FIELD: heat supply systems. ^ SUBSTANCE: device comprises metallic tank for water to be heated, U-shaped heater that is submerged into the water, and automatic gas-burning unit. The supply and return ducts of the heater are connected in series. The return duct is made of two hemispheres whose flat surfaces are provided with pins and have cylindrical strikers welded to the surface so that to be directed inward. When the strikers vibrate due to burning, they strike on the spherical surface thus causing a sound wave that removes scale and film boiling. ^ EFFECT: enhanced reliability and efficiency and reduced sizes. ^ 4 dwg |
