# US 12,760,934 B2 · System and method of energy efficient hot and cold water management > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,760,934 B2 - Document ID: US12760934B2 - Status: Granted - Kind: B2 - Application number: 17/787,422 - Filed: 2020-12-21 - Published: 2023-01-19 - Granted: 2026-10-13 - Earliest claimed: 2019-12-19 - Applicants: Urvi Chauhan; Rudra Pratap Singh Chauhan; Jagdeep Ravindra Kumar - Inventors: Urvi Chauhan; Rudra Pratap Singh Chauhan; Jagdeep Ravindra Kumar - Web page: https://patentgrep.com/patent/US12760934B2 ## CPC - F24H 15/223: in the water storage tank - F24D 17/0031: {with accumulation of the heated water} - F24D 19/1051: {for domestic hot water} - F24H 15/156: Reducing the quantity of energy consumed; Increasing efficiency - F24H 15/174: Supplying heated water with desired temperature or desired range of temperature - F24H 15/248: of water storage tanks - F24H 15/262: Weather information or forecast - F24H 15/269: Time, e.g. hour or date - F24H 15/281: Input from user - F24H 15/305: Control of valves (of heat pumps F24H15/385, F24H15/39) - F24H 15/31: of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves - F24H 15/355: Control of heat-generating means in heaters - F24H 15/395: Information to users, e.g. alarms - F24D 2220/042: Temperature sensors - F24D 2220/048: Level sensors, e.g. water level sensors - F24H 15/464: using local wireless communication - F24H: FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL (steam generation F22) - F24D: DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR (using steam or condensate extracted or exhausted from steam engine plants for heating purposes F01K17/02) ## Abstract Disclosed are system 100 and method of energy efficient hot and cold water management. The system 100 comprises: a control unit 101 for dynamically controlling the functioning of the system 100; at least a water storage tank 102 with at least one of a water level sensor, at least a heating element 1021, at least a temperature sensor 1022 or any combination thereof; at least an auxiliary water storage tank 103 with at least one of a water level sensor, at least a temperature sensor 1032; at least a water mixer unit 105 having at least a temperature sensor 1051; a user interface unit 1012 for controlling and monitoring different parameters including temperature, water level, opening and closing of valves 108 and 109; and a power supply with power backup unit 104 for providing basic power for proper functioning of the system 100. ## Claims ### Claim 1 A system (100) of energy efficient hot and cold water management by dynamically controlling the functioning of the system (100) for minimizing the energy consumption by heating and cooling water according to requirements and atmospheric temperature conditions and providing on-device and remote monitoring and controlling of the system (100), comprising: at least a water storage tank (102) with at least one of a water level sensor; at least a heating element (1021); at least one cooling element (1023) disposed in the water storage tank; at least a temperature sensor (1022) or any combination thereof; at least one outer water storage tank (113) exposed to ambient conditions exterior to a household; at least an auxiliary water storage tank (103) with at least one of a water level sensor and a temperature sensor (1032); at least a water mixer unit (105) having at least a temperature sensor (1051) and two inlets for mixing of very hot water and cold water; a reverse osmosis, abbreviated RO, water purifier (114) supplying waste water to the auxiliary water storage tank (103); a user interface unit (1012) for controlling and monitoring different parameters including temperature, water level, opening and closing of valves (108) and (109); and a power supply with a power backup unit (104) for providing basic power for proper functioning of the system (100); wherein the water storage tank (102) is adapted to store very hot water at a controlled temperature which is further used to mix with cold water in the water mixer unit (105); wherein the outer water storage tank (113) contains water at an atmospheric temperature and the auxiliary storage tank (103) is adapted to store water from the outer water storage tank (113) depending on weather conditions and clock time; wherein the heating element (1021) is adapted to heat hot water coming in the water storage tank (102) from an external hot water source if temperature of the hot water coming in the water storage tank (102) is below a required temperature of the hot water, wherein the temperature sensor (1022) aids in controlling the temperature of the hot water; wherein the system (100) is capable of detecting the weather condition and time of the day to intelligently store water in the auxiliary water storage Tank (103), transferring the water from the outer water storage tank (113) into the auxiliary water storage tank (103) in the evening during winter and in the morning during summer. ### Claim 2 (depends on 1) The system (100) of claim 1, wherein the auxiliary water storage tank (103) further comprises; at least one of a cooling element (1031), (1023) and a safety valve (1033); wherein the cooling element (1031), (1023) is powered by a grid (110) through a cooling switch (107) according to a Real Time Clock and weather conditions or as per user requirement, wherein the safety valve (1033) ensures that the water level in the auxiliary water storage tank (103) does not exceed a safety limit and protections against failure of the valves (108) and (109). ### Claim 3 (depends on 1) The system (100) of claim 1 being capable of receiving weather information and time of the day through the internet. ### Claim 4 (depends on 1) The system (100) of claim 1, wherein at least a hard water softening cartridge (1011) is used to remove the hardness of water coming from the outer water storage tank (113) before storing it in the auxiliary water storage tank (103). ### Claim 5 (depends on 1) The system (100) of claim 1, wherein the water mixer unit (105) includes two inlets for very hot water from water storage tank (102) and cold water from the auxiliary water storage tank (103). ### Claim 6 (depends on 1) The system (100) of claim 1, wherein the grid (110) is a basic power source for the power supply with power backup (104) and a cooling element (1013). ### Claim 7 (depends on 1) The system (100) of claim 1, wherein the grid or other energy source (111) includes electricity, fossil fuels, natural gas, LPG, solar energy or any other energy sources to provides energy for heating water. ### Claim 8 (depends on 1) The system (100) of claim 1, wherein a waste water from a RO water purifier (114) is passed through the hard water softening cartridge (1011) before storage in the auxiliary water storage tank (103) through a valve (1010). ### Claim 9 (depends on 1) The system (100) of claim 1, wherein the hot water from the external hot water source may be used as a hot water source in place of heating the cold water in the water storage tank (102). ### Claim 10 (depends on 1) The system (100) of claim 1, wherein manual and automatic mixing of cold water from the auxiliary water storage tank (103) and very hot water from the water storage tank (102) in the water mixer (105) is performed with the help of any of pumps, the valves (108) and (109) and the control unit (101). ### Claim 11 (depends on 1) The system (100) of claim 1, wherein at least one of the cooling elements (1031) and (1023) is capable of providing cold water during summers.