System comprising a static microdoser for introducing an additive into a container
The invention relates to a system for introducing an additive into a container ( 4 ) partially filled with a main liquid material. It comprises an automated conveyor for transporting the container ( 4 ) along a straight horizontal trajectory (T) at a substantially constant container speed (Vc). It further comprises a static microdoser ( 6 ) having a nozzle ( 9 ) from which at least one jet ( 8 ) of an additive issues upon passage of an opening ( 7 ) of the container ( 4 ). The system is configured to introduce a given mass of additive into the container. The nozzle of the microdoser ( 6 ) is inclined relative to a vertical direction that is perpendicular to the trajectory (T). The inclination of the nozzle, the number, the shape and the speed (Vj) of the at least one jet, the mass of additive, and the container speed (Vc) are configured such that the specific kinetic energy of the impact of the at least one jet on the free surface of the main liquid material is less than 3000 mJ/m 2 .
1. A system for introducing an additive into a container partially filled with a main liquid material, the system comprising an automated conveyor for transporting the container along a straight horizontal trajectory (T) at a substantially constant container speed (Vc),
the system further comprising a static microdoser having a nozzle from which at least one jet of an additive issues upon passage of an opening of the container in proximity to the nozzle to introduce the additive into said container,
wherein the nozzle of the microdoser is inclined relative to a vertical direction that is perpendicular to the trajectory (T),
wherein the system is configured to introduce a given quantity of additive into the container, said quantity having a mass (m),
the at least one jet hits a free surface of the main liquid material at a relative impact speed (V), over an area A of said free surface of the main liquid material; and
the system is configured, with regard to the inclination of the nozzle, to the number, the shape and the speed (Vj) of the at least one jet, to the mass (m), and to the container speed (Vc), such that
the specific kinetic energy (I) of the impact of the at least one jet on the free surface of the main liquid material, defined by the formula:
I
=
1
2
m
*
V
2
A
is less than 3000 mJ/m 2 .
2. A system according to claim 1 , wherein it is configured such that the specific kinetic energy (I) is less than 2000 mJ/m 2 .
3. A system according to claim 1 , wherein the at least one jet has vertical and horizontal speed components that are non-null, the horizontal speed component (Vx) of the jet being substantially parallel to the trajectory (T) of the container, and
wherein the inclination of the nozzle, the speed of the at least one jet issued from the nozzle and the container speed (Vc) are configured such that a relative horizontal speed between the jet and the container is less than 1 m/s.
4. A system according to claim 1 , wherein the nozzle is oriented such that the at least one jet issued from the nozzle forms an angle with the vertical direction comprised between 20° and 50°.
5. A system according to claim 1 , wherein the jet vertical speed (Vy) of the at least one jet is less than 1.2 m/s.
6. A system according to claim 1 , wherein the container speed Vc is higher than 0.6 m/s.
7. A system according to claim 1 , wherein the nozzle-comprises a plurality of holes, so that a plurality of jets having parallel trajectories are issued from the nozzle upon passage of the opening of the container in proximity to the nozzle.
8. A system according to claim 7 , wherein the nozzle comprises two to thirty holes.
9. A system according to claim 1 , wherein the system comprising a container, wherein the container has an open upper face forming its opening.
10. A system according to claim 9 , wherein the container is a can.
11. A system according to claim 9 , wherein the system is configured so that each jet of additive hits a free surface of the main liquid material along a straight horizontal path over a length of at least 40% of the length of the free surface of the main liquid material along this path.
12. A system according to claim 11 , wherein the container has a cylindrical shape, wherein at least one jet of additive hits the free surface of the main liquid material along a diameter of the container.
13. A system according claim 12 , wherein the at least one jet of additive hits the free surface-of the main liquid material over a width (W) comprised between 18% and 68% of the diameter the container.
14. A system according to claim 1 , wherein the main liquid material is selected from the group consisting of water, a soda, lemonade, and a soup.
15. A system according to claim 1 , wherein the additive is selected from the group consisting of an edible flavouring concentrate, a mineral concentrate, and a functional concentrate.