Liquid concentrate dosing systems

Patent metadata

Field	Value
Publication number	US-11866915-B2
Application number	US-202017113173-A
Country	US
Kind code	B2
Filing date	Dec 7, 2020
Priority date	Dec 7, 2020
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

A liquid dosing system is disclosed and can include a cartridge comprising a reservoir configured to store an additive, an output vessel in fluid communication with the reservoir, and a cartridge outlet in fluid communication with the output vessel. The liquid dosing system can include a housing that includes a water passage configured to direct water though the liquid dosing system and a receiving portion configured to at least partially receive the cartridge when the cartridge is connected to the housing. The receiving portion can include a receiving port in fluid communication with the water passage, and the receiving port can be configured to receive at least some of the additive from the cartridge outlet when the cartridge is connected to the housing. The receiving portion can include a motor configured to engage in mechanical communication with the output vessel when the cartridge is connected to the housing.

First claim

What is claimed is:

1. A liquid dosing system comprising:
a cartridge comprising:
a reservoir configured to store an additive;
an additive output vessel in fluid communication with the reservoir; and
a cartridge outlet in fluid communication with the additive output vessel; and

a housing comprising:
a water passage in fluid communication with an inlet of the housing and an outlet of the housing;
a receiving portion configured to at least partially receive the cartridge when the cartridge is connected to the housing, the receiving portion comprising:
a receiving port in fluid communication with the water passage, the receiving port configured to receive at least some of the additive from the cartridge outlet when the cartridge is connected to the housing; and
a motor configured to engage in mechanical communication with the additive output vessel when the cartridge is connected to the housing;

a flow meter configured to measure a flow rate and output flow rate data indicative of the flow rate; and
a controller in electrical communication with the flow meter and the motor, the controller configured to:
receive the flow rate data from the flow meter; and
output, based at least in part on the flow rate data, instructions for the motor to output a predetermined amount of the additive for mixing with water flowing through the water passage,
wherein the controller is configured to output the instructions for the motor in response to determining, based on the flow rate data, that the water has stopped flowing through the water passage.

2. The liquid dosing system of claim 1 , wherein the additive output vessel is a flexible tube.

3. The liquid dosing system of claim 2 , wherein the housing further comprises a peristaltic pump comprising:
the motor; and
a rotor system in mechanical communication with the motor, the rotor system configured to at least partially impinge the flexible tube when the cartridge is connected to the housing.

4. The liquid dosing system of claim 1 , wherein the reservoir is the additive output vessel, the cartridge further comprising:
a screw; and
a plunger (i) disposed within the reservoir, (ii) connected to the screw, and (iii) configured to move laterally within the reservoir when the screw turns.

5. The liquid dosing system of claim 4 , wherein the screw is configured to mechanically communicate with the motor when the cartridge is connected to the housing.

6. The liquid dosing system of claim 1 , wherein the motor comprises at least one of a stepper motor, a continuous motor with a gear reducer, and a variable frequency drive direct drive motor.

7. The liquid dosing system of claim 1 , wherein the cartridge further comprises a check valve configured to permit the additive to flow out of the cartridge and to prevent fluids from flowing into the cartridge.

8. The liquid dosing system of claim 1 further comprising a latching system configured to detachably attach the cartridge to the housing.

9. The liquid dosing system of claim 1 , wherein the controller is configured to output the instructions for the motor in response to determining, based on the flow rate data, that a flow rate of the water flowing through the water passage is less than a predetermined flow rate threshold.

10. The liquid dosing system of claim 1 , wherein the additive comprises at least one of sodium hexametaphosphate and sodium polyphosphate.

11. The liquid dosing system of claim 10 , wherein the predetermined amount of the additive corresponds to between approximately 1 part per million (ppm) and 10 ppm of the additive in the water.

12. The liquid dosing system of claim 10 , wherein the predetermined amount of the additive corresponds to between approximately 0.020 mL and approximately 0.040 mL of additive per gallon of the water flowing through the water passage.

13. The liquid dosing system of claim 1 , wherein at least one of the cartridge and the housing includes a user interface in electrical communication with the controller, the user interface being configured to indicate a status of the cartridge.

14. A liquid dosing system comprising:
a cartridge comprising:
a reservoir configured to store an additive;
a pump cavity in fluid communication with the reservoir;
a cartridge outlet in fluid communication with the pump cavity; and
a diaphragm membrane attached to at least a portion of the pump cavity; and

a housing comprising:
a water passage in fluid communication with an inlet of the housing and an outlet of the housing;
a receiving portion configured to at least partially receive the cartridge when the cartridge is connected to the housing, the receiving portion comprising:
a receiving port in fluid communication with the water passage, the receiving port configured to receive at least some of the additive from the cartridge outlet when the cartridge is connected to the housing; and
a motor configured to engage in mechanical communication with the diaphragm membrane when the cartridge is connected to the housing;

a flow meter configured to measure a flow rate and output flow rate data indicative of the flow rate; and
a controller in electrical communication with the flow meter and the motor, the controller configured to:
receive flow rate data from the flow meter; and
output, based at least in part on the flow rate data, instructions for the motor to output a predetermined amount of the additive for mixing with water flowing through the water passage,
wherein the controller is configured to output the instructions for the motor in response to determining, based on the flow rate data, that the water has stopped flowing through the water passage.

15. The liquid dosing system of claim 14 , wherein the diaphragm membrane is elastic.

16. The liquid dosing system of claim 14 further comprising:
a first one-way valve located downstream of the reservoir and upstream of the pump cavity, the first one-way valve being configured to permit the additive to flow out of the reservoir and to prevent fluids from flowing into the reservoir; and
a second one-way valve located downstream of the pump cavity and upstream of the water passage, the second one-way valve being configured to permit the additive to flow out of the pump cavity and to prevent the fluids from flowing into the pump cavity.

17. The liquid dosing system of claim 14 , wherein the cartridge is detachably attachable to the housing.

18. The liquid dosing system of claim 17 further comprising a latching system configured to detachably attach the cartridge to the housing.

19. A liquid dosing system comprising:
a cartridge comprising:
a reservoir configured to store an additive, wherein the additive comprises at least one of sodium hexametaphosphate and sodium polyphosphate;
an additive output vessel in fluid communication with the reservoir; and
a cartridge outlet in fluid communication with the additive output vessel; and

a housing comprising:
a water passage in fluid communication with an inlet of the housing and an outlet of the housing;
a receiving portion configured to at least partially receive the cartridge when the cartridge is connected to the housing, the receiving portion comprising:
a receiving port in fluid communication with the water passage, the receiving port configured to receive at least some of the additive from the cartridge outlet when the cartridge is connected to the housing; and
a motor configured to engage in mechanical communication with the additive output vessel when the cartridge is connected to t

Assignees

• Rheem Mfg Co

Inventors

• Leigh Taylor
• Lye Jason
• Manay Atilhan
• Phelps Stephen
• Trant Troy
• Thomas Jon
• Amaravadhi Prudhvi
• Holman Edward
• Sangare Fahira

Classifications

• E03B7/074 Primary

  Arrangement of water treatment devices · CPC title

• E03B7/072

  Arrangement of flowmeters · CPC title

• E03B7/075

  Arrangement of devices for control of pressure or flow rate · CPC title

• C02F1/686

  Devices for dosing liquid additives · CPC title

• C02F5/086

  Condensed phosphates · CPC title