(57) A dosing device for a liquid (8) in a feeding fluid (29), particularly water, which
flows into heating and/or vaporization circuits for sanitary or food use, both industrial
and domestic, includes: a fitting (2), whose ends can be jointed to a feeding duct
(3), provided with an inner throttling (2a) fit to create a depression in the fluid
downstream the same duct; a closing element (4) associated to the fitting (2) and
provided with a couple of regulating ducts (5) positioned in proximity of the opposite
walls of said throttling (2a) and fit to connect the section of said fitting (2) with
a container (6) of the liquid (8), provided with an upper opening removably closable
by means of the closing element (4); diverter means (7), interposed between the closing
element (4) and the container (6), fit to direct a predetermined fluid amount at first
through an inlet path included between fitting (2) and container (6), through an inlet
duct (5a), and afterwards to direct an equal amount of a mixture of fluid with liquid
(8) through an outflow path included between the container (6) and the fitting (2),
by means of an outflow flow (5b); a splashguard ring (30) below the diverter means
(7) and fit to divert and to reduce the pressure force of the water spout coming from
the inlet path of said diverter means (7) and directed towards the inside of the container
(6).
The inlet and outflow paths of the diverter means (7) have a spiral shape, symmetrically
and concentrically positioned and separated between them by means of a couple of spiral
shaped coils (16) having a shared end.
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