Pneumatic system for fluid mixture dispensing device

1. A fluid mixture dispensing device comprising:

a set of pressurized ingredient reservoirs containing ingredients;

a mixing area configured to receive at least one ingredient from the set of pressurized ingredient reservoirs;

a set of dispensing valves configured to dispense, into the mixing area, ingredients from the set of pressurized ingredient reservoirs;

a pressure source;

an accumulator chamber configured to supply pressure to the set of pressurized ingredient reservoirs and to force air through the mixing area;

a pressure sensor configured to measure pressure in the set of pressurized ingredient reservoirs; and

a controller programmed to:

pressurize the accumulator chamber using the pressure source;

receive measurements from the pressure sensor;

set, based on the measurements from the pressure sensor and using the accumulator chamber, a pressure for the set of pressurized ingredient reservoirs;

dispense, using at least one dispensing valve in the set of dispensing valves, the at least one ingredient from the set of pressurized ingredient reservoirs into the mixing area; and

force air into the mixing area using the accumulator chamber.

2. The fluid mixture dispensing device of claim 1 , wherein:

the controller is further programmed to force the air into the mixing area to dispense the at least one ingredient out of the mixing area.

3. The fluid mixture dispensing device of claim 1 , wherein:

the controller is further programmed to force the air into the mixing area to clean the mixing area.

4. The fluid mixture dispensing device of claim 1 , wherein:

the accumulator chamber provides pressure to the set of pressurized ingredient reservoirs via a first channel;

the accumulator chamber provides pressure to the mixing area via a second channel; and

the first channel and the second channel are different.

5. The fluid mixture dispensing device of claim 4 , further comprising:

a set of valves;

wherein:

the first channel comprises at least one valve, from the set of valves, exclusive to the first channel;

the second channel comprises at least one valve, from the set of valves, exclusive to the second channel; and

the first channel and the second channel comprise at least one valve, from the set of valves, common to both the first channel and the second channel.

6. The fluid mixture dispensing device of claim 1 , further comprising:

a set of valves;

at least one solvent reservoir; and

a three-way valve between the at least one solvent reservoir and the mixing area;

wherein the three-way valve is in the set of valves; and

wherein the controller is further programmed to force air into the mixing area using the three-way valve.

7. The fluid mixture dispensing device of claim 6 , wherein:

the at least one solvent reservoir is connected upstream of the three-way valve;

the three-way valve moves solvent from the at least one solvent reservoir to a downstream solvent line; and

the mixing area includes the downstream solvent line.

8. The fluid mixture dispensing device of claim 6 , further comprising:

a second solvent reservoir; and

a mixed solvent line configured to receive solvent from the at least one solvent reservoir and the second solvent reservoir;

wherein the mixed solvent line is connected upstream of the three-way valve.

9. The fluid mixture dispensing device of claim 8 , wherein:

the three-way valve connects the mixed solvent line to a downstream mixed solvent line, wherein the downstream mixed solvent line is connected downstream of the three-way valve; and

the mixing area includes the downstream mixed solvent line.

10. The fluid mixture dispensing device of claim 1 , wherein the mixing area comprises:

a set of mixing channels; and

a solvent inlet line fluidly connected to a solvent reservoir to receive a solvent;

wherein the set of mixing channels receive the at least one ingredient from the set of pressurized ingredient reservoirs as they are dispensed by the pressure in the set of pressurized ingredient reservoirs into the solvent; and

wherein the air forced into the mixing area is forced into the solvent inlet line.

11. The fluid mixture dispensing device of claim 10 , wherein:

at least one channel in the set of mixing channels is configured to receive at least two different ingredients from at least two different ingredient reservoirs in the set of pressurized ingredient reservoirs.

12. The fluid mixture dispensing device of claim 1 , wherein:

the set of dispensing valves comprises at least one electromechanical solenoid;

the at least one ingredient is dispensed from the set of pressurized ingredient reservoirs via the at least one electromechanical solenoid.

13. The fluid mixture dispensing device of claim 12 , further comprising:

a set of valves;

wherein:

the pressure source is off when the at least one ingredient is dispensed from the set of pressurized ingredient reservoirs; and

the controller is programmed to operate the set of valves to use the accumulator chamber to control the pressure in the set of pressurized ingredient reservoirs when the at least one ingredient is dispensed from the set of pressurized ingredient reservoirs using the at least one electromechanical solenoid.

14. The fluid mixture dispensing device of claim 1 , further comprising:

an inlet valve;

wherein the set of pressurized ingredient reservoirs are in a pressurized cartridge;

and

wherein the controller is further programmed to:

set the pressure in at least one ingredient reservoir in the set of pressurized ingredient reservoirs using the inlet valve.

15. The fluid mixture dispensing device of claim 14 , wherein the controller is further programed to:

open the inlet valve when the pressure in the at least one ingredient reservoir has reached a first level; and

close the inlet valve when the pressure in the at least one ingredient reservoir has reached a second level;

wherein the inlet valve receives pressure from the accumulator chamber.

16. The fluid mixture dispensing device of claim 1 , wherein:

dispensing a fluid mixture by the fluid mixture dispensing device causes a pressure drop in the set of pressurized ingredient reservoirs; and

the accumulator chamber stores pressure to pressurize the set of pressurized ingredient reservoirs to dispense at least two fluid mixtures without using the pressure source.

17. A fluid mixture dispensing device comprising:

a set of pressurized ingredient reservoirs containing ingredients;

a mixing area;

a set of dispensing valves configured to dispense ingredients from the set of pressurized ingredient reservoirs;

a pressure source;

at least one solvent reservoir;

an accumulator chamber pressurized by the pressure source;

a solvent pump;

a pressure sensor configured to measure pressure in the set of pressurized ingredient reservoirs;

a three-way valve fluidly connected to the at least one solvent reservoir, the mixing area, and the pressure source;

wherein the accumulator chamber pressurizes the set of pressurized ingredient reservoirs based on measurements from the pressure sensor;

wherein at least one dispensing valve in the set of dispensing valves dispenses at least one ingredient from the set of pressurized ingredient reservoirs into the mixing area;

wherein the solvent pump moves a solvent from the at least one solvent reservoir towards the three-way valve; and

wherein the accumulator chamber forces air, through the three-way valve, to the mixing area and thereby moves the solvent through the mixing area.

18. The fluid mixture dispensing device of claim 17 , wherein the three-way valve:

allows the solvent from the at least one solvent reservoir to flow to the mixing area in a first configuration; and

allows air from the accumulator chamber to flow to the mixing area in a second configuration.

19. The fluid mixture dispensing device of claim 17 , further comprising:

a second solvent reservoir; and

a mixed solvent line configured to receive solvent from the at least one solvent reservoir and the second solvent reservoir;

wherein the mixed solvent line is connected upstream of the three-way valve.

20. The fluid mixture dispensing device of claim 17 , wherein the mixing area comprises:

a set of mixing channels; and

a solvent inlet line fluidly connected to the at least one solvent reservoir to receive a solvent flow;

wherein the set of mixing channels receive at least one ingredient from the set of pressurized ingredient reservoirs as they are dispensed into the solvent flow; and

wherein the accumulator chamber moves the solvent flow through the mixing area by forcing air via the solvent inlet line.

21. The fluid mixture dispensing device of claim 20 , wherein:

at least one channel in the set of mixing channels is configured to receive at least two different ingredients from at least two different ingredient reservoirs in the set of pressurized ingredient reservoirs.

22. The fluid mixture dispensing device of claim 20 , wherein:

the at least one ingredient is dispensed from the set of pressurized ingredient reservoirs via at least one electromechanical solenoid.