# US 2013/0152301 A1 · Domestic appliance > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0152301 A1 - Document ID: US20130152301A1 - Status: Published application - Kind: A1 - Application number: 13/711,154 - Filed: 2012-12-11 - Published: 2013-06-20 - Earliest claimed: 2011-12-12 - Assignees: Dyson Technology Limited - Inventors: Andre David BROWN; Stephen Benjamin COURTNEY - Web page: https://patentgrep.com/patent/US20130152301A1 ## CPC - E03C 1/18: Sinks, whether or not connected to the waste-pipe - F24D 17/0052: {recuperated waste heat and conventional heating means} - F28D 1/06: with the heat-exchange conduits forming part of, or being attached to, the tank containing the body of fluid - F28D 21/0012: {the heat being recuperated from waste water or from condensates} - E03C 2001/005: {Installations allowing recovery of heat from waste water for warming up fresh water} - Y02B 10/70: Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies - Y02B 30/18: Domestic hot-water supply systems using recuperated or waste heat - Y02B 30/56: Heat recovery units - E03C: DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER (not connected to either water-supply main or to waste pipe A47K; devices of the kind used in the ground E03B, E03F); SINKS - 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) - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract A hand washing station has a receptacle with a raised or domed portion, a fluid dispenser for dispensing a relatively hot fluid, a drain for draining fluid from the receptacle, and a cooling jacket for conveying a relatively cold fluid beneath the raised portion of the receptacle. The raised portion of the receptacle forms part of a heat exchanger for transferring heat from the relatively hot fluid within the receptacle to the relatively cold fluid within the cooling jacket. ## Claims ### Claim 1 A hand washing station comprising a receptacle having a drain, and a fluid dispenser for dispensing fluid into the receptacle, the receptacle comprising a heat exchanger for transferring heat between the dispensed fluid and a second fluid, the heat exchanger forming at least part of an external surface of the receptacle. ### Claim 2 (depends on 1) The hand washing station as claimed in claim 1, wherein the heat exchanger forms at least part of a convex external surface of the receptacle. ### Claim 3 (depends on 1) The hand washing station as claimed in claim 1, wherein the heat exchanger forms at least part of an external surface of the receptacle which has a substantially spherical curvature. ### Claim 4 (depends on 1) The hand washing station as claimed in claim 1, wherein the fluid dispenser is arranged to dispense fluid on to the heat exchanger. ### Claim 5 (depends on 1) The hand washing station as claimed in claim 1, wherein the heat exchanger has a hydrophilic external surface. ### Claim 6 (depends on 1) The hand washing station as claimed in claim 1, wherein the heat exchanger forms at least part of an external surface of the base of the receptacle. ### Claim 7 (depends on 6) The hand washing station as claimed in claim 6, wherein the heat exchanger forms at least part of a raised section of the base. ### Claim 8 (depends on 7) The hand washing station as claimed in claim 7, wherein the raised section of the base is convex in shape. ### Claim 9 (depends on 7, 8) The hand washing station as claimed in claim 7 or claim 8, wherein the raised section of the base has a substantially spherical curvature. ### Claim 10 (depends on 7) The hand washing station as claimed in claim 7, wherein the receptacle comprises a side wall having an external surface extending about the raised section of the base. ### Claim 11 (depends on 10) The hand washing station as claimed in claim 10, wherein the heat exchanger forms at least part of the external surface of the side wall of the receptacle. ### Claim 12 (depends on 10, 11) The hand washing station as claimed in claim 10 or claim 11, wherein the drain is located between the side wall and the raised section of the base. ### Claim 13 (depends on 7) The hand washing station as claimed in claim 7, wherein the fluid dispenser is arranged to dispense fluid directly on to the raised section of the base. ### Claim 14 (depends on 1) The hand washing station as claimed in claim 1, wherein the receptacle comprises a fluid conveying system arranged to convey a flow of the second fluid adjacent to an internal surface of the heat exchanger. ### Claim 15 (depends on 14) The hand washing station as claimed in claim 14, wherein the fluid conveying system is arranged to convey a flow of the second fluid over the internal surface of the heat exchanger. ### Claim 16 (depends on 14, 15) The hand washing station as claimed in claim 14 or claim 15, wherein the fluid conveying system is arranged to convey a flow of the second fluid over or adjacent to the internal surface of the heat exchanger in a direction substantially opposite to that in which the dispensed fluid flows over the external surface of the heat exchanger. ### Claim 17 (depends on 14, 15) The hand washing station as claimed in claim 14 or 15, wherein the fluid conveying system is arranged to convey the flow of the second fluid internally towards an apex of a convex section of the heat exchanger. ### Claim 18 (depends on 14, 15) The hand washing station as claimed in claim 14 or 15, wherein the fluid conveying system comprises a jacket delimited at least in part by the internal surface of the heat exchanger. ### Claim 19 (depends on 18) The hand washing station as claimed in claim 18, wherein the jacket comprises at least one fluid inlet port. ### Claim 20 (depends on 18) The hand washing station as claimed in claim 18, wherein the jacket comprises a fluid outlet port. ### Claim 21 (depends on 20) The hand washing station as claimed in claim 20, wherein the jacket comprises a domed section, and the fluid outlet port is located at an apex of the domed section of the jacket. ### Claim 22 (depends on 14) The hand washing station as claimed in claim 14, comprising an outlet conduit for conveying second fluid from the fluid conveying system. ### Claim 23 (depends on 22) The hand washing station as claimed in claim 22, comprising a heater for heating fluid located within the outlet conduit. ### Claim 24 (depends on 22) The hand washing station as claimed in claim 22, comprising a mixer having a first inlet for receiving fluid from the outlet conduit, a second inlet for receiving a relatively hot fluid, and an outlet connected to the fluid dispenser. ### Claim 25 (depends on 14) A plurality of hand washing stations, each as claimed in claim 14 and comprising a respective outlet conduit, the outlet conduits of the hand washing stations being connected to a common mixer for mixing a hot fluid with fluid received from the outlet conduits to form fluid for dispensing from the fluid dispensers of the hand washing stations.