# US 11,639,300 B2 · Water sanitation system and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,639,300 B2 - Document ID: US11639300B2 - Status: Granted - Kind: B2 - Application number: 16/862,248 - Filed: 2020-04-29 - Published: 2020-10-29 - Granted: 2023-05-02 - Earliest claimed: 2019-04-29 - Assignees: Logic Corporation - Applicants: Spa Logic, Inc. - Inventors: Darcy Amendt; David Bradley Andersen - Web page: https://patentgrep.com/patent/US11639300B2 ## CPC - C02F 1/46104: {Devices therefor; Their operating or servicing} - C02F 1/4674: {with halogen or compound of halogens, e.g. chlorine, bromine} - C02F 2103/42: from bathing facilities, e.g. swimming pools - C02F 2201/4613: Inversing polarity - C02F 2201/46135: Voltage - C02F 2201/4614: Current - C02F 2201/4615: Time - C02F 2201/4616: Power supply - C02F 2209/005: Processes using a programmable logic controller [PLC] - C02F 2209/02: Temperature - C02F 2209/04: Oxidation reduction potential [ORP] - C02F 2209/05: Conductivity or salinity - C02F 2209/06: pH - C02F 2209/11: Turbidity - C02F 2209/29: Chlorine compounds - C02F 2303/04: Disinfection - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) ## Abstract Systems and methods for electrolytic spa sanitation are provided which control electrodes in a manner that extends the use of electrodes, reducing the frequency of replacement of electrodes. The system also incorporates electrodes that can be easily replaced by a user, further reducing the need to maintenance by trained service personnel. Systems and methods use measurements from ORP, pH, and temperature sensors to determine the amount of sanitizer necessary to be produced from the electrodes. The electrodes are capable or acting as either an anode or a cathode. ## Claims ### Claim 1 A method for controlling a spa sanitation system of a water-containing vessel, comprising: acquiring Oxidation Reduction Potential (ORP) measurements, pH measurements, and temperature measurements for water in the water-containing vessel; determining a voltage and a current to be delivered to two or more electrodes of the spa sanitation system to electrolytically produce a sanitizer; determining a time period for which to run the two or more electrodes to electrolytically produce the sanitizer; and selecting a polarity configuration of the two or more electrodes; wherein the polarity configuration comprises at least a first polarity and a second polarity; wherein the step of selecting the polarity configuration comprises measuring a first impedance of the two or more electrodes in the first polarity and measuring a second impedance of the two or more electrodes in the second polarity, and selecting the polarity configuration having a lower impedance; and further comprising switching the polarity configuration based on the first impedance and the second impedance such that the polarity configuration with the lower impedance is used. ### Claim 2 (depends on 1) The method of claim 1, further comprising turning off pumps of the water-containing vessel. ### Claim 3 (depends on 2) The method of claim 2, wherein the steps of turning off the pumps, acquiring ORP measurements, pH measurements, and temperature measurements, determining the voltage and the current, determining the time period, and selecting the polarity configuration are performed in an operational cycle of a plurality of operational cycles. ### Claim 4 (depends on 3) The method of claim 3, further comprising periodically switching the polarity configuration if the polarity configuration was unchanged for a threshold number of consecutive operational cycles. ### Claim 5 (depends on 1) The method of claim 1, further comprising monitoring a cumulative charge delivered to the two or more electrodes in each of the first polarity and the second polarity. ### Claim 6 (depends on 1) The method of claim 1, further comprising injecting a pH adjust down chemical into the water if the pH measurements are above a maximum pH threshold. ### Claim 7 (depends on 1) The method of claim 1, wherein the voltage delivered to the two or more electrodes is increased from zero to the voltage gradually over a ramp period. ### Claim 8 (depends on 1) The method of claim 1, further comprising locating the two or more electrodes adjacent a side wall of the water-containing vessel. ### Claim 9 (depends on 1) The method of claim 1, further comprising communicating through a communications interface. ### Claim 10 A sanitation system for a water-containing vessel, comprising: a controller configured to acquire Oxidation Reduction Potential (ORP) measurements, pH measurements, and temperature measurements for water in the water-containing vessel; determine a voltage and a current to be delivered to two or more electrodes of the sanitation system to electrolytically produce a sanitizer; determine a time period for which to run the two or more electrodes to electrolytically produce the sanitizer; and select a polarity configuration of the two or more electrodes; wherein the polarity configuration comprises at least a first polarity and a second polarity; wherein when the controller selects the polarity configuration, it measures a first impedance of the two or more electrodes in the first polarity and measures a second impedance of the two or more electrodes in the second polarity, and selects the polarity configuration having a lower impedance; and wherein the controller is further configured to switch the polarity configuration based on the first impedance and the second impedance such that the polarity configuration with the lower impedance is used. ### Claim 11 (depends on 10) The sanitation system of claim 10, wherein the controller is further configured to turn off pumps of the water-containing vessel. ### Claim 12 (depends on 11) The sanitation system of claim 11, wherein the turning off the pumps, acquiring ORP measurements, pH measurements, and temperature measurements, determining the voltage and the current, determining the time period, and selecting the polarity configuration are performed in an operational cycle of a plurality of operational cycles. ### Claim 13 (depends on 10) The sanitation system of claim 10, wherein the controller is further configured to periodically switch the polarity configuration if the polarity configuration was selected for a threshold number of consecutive operational cycles of a plurality of operational cycles. ### Claim 14 (depends on 10) The sanitation system of claim 10, wherein the controller is further configured to monitor a cumulative charge delivered to the two or more electrodes in each of the first polarity and the second polarity. ### Claim 15 (depends on 10) The sanitation system of claim 10, wherein the controller is further configured to inject a pH adjust down chemical into the water if the pH measurements are above a maximum pH threshold. ### Claim 16 (depends on 10) The sanitation system of claim 10, wherein the voltage delivered to the two or more electrodes is increased from zero to the determined voltage gradually over a ramp period. ### Claim 17 (depends on 10) The sanitation system of claim 10, wherein the two or more electrodes are located adjacent a side wall of the water-containing vessel. ### Claim 18 (depends on 10) The sanitation system of claim 10, wherein the controller is further configured to communicate through a communications interface.