# US 2013/0152303 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 2013/0152303 A1 - Document ID: US20130152303A1 - Status: Published application - Kind: A1 - Application number: 13/711,200 - 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/US20130152303A1 ## CPC - E03C 1/044: having a heating or cooling apparatus in the supply line (water heaters, e.g. with continuous flow, F24H) - E03C 1/18: Sinks, whether or not connected to the waste-pipe - F24D 17/0005: {using recuperation of waste heat (F24D17/0036 takes precedence)} - F24D 17/0052: {recuperated waste heat and conventional heating means} - F28D 3/00: Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits (F28D5/00 takes precedence) - F28D 21/0012: {the heat being recuperated from waste water or from condensates} - F28D 21/0015: {Heat and mass exchangers, e.g. with permeable walls} - 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 fluid dispenser for dispensing a relatively hot fluid into a receptacle having a drain. The fluid dispenser is arranged to dispense fluid on to a heat exchanger located above the drain. A relatively cold fluid is conveyed adjacent or over an internal surface of the heat exchanger. ## Claims ### Claim 1 A hand washing station comprising a fluid dispenser, a receptacle having a drain, a heat exchanger located above the drain and on to which the fluid dispenser is arranged to dispense fluid, and a fluid conveying system arranged to convey a second fluid adjacent or over an internal surface of the heat exchanger. ### Claim 2 (depends on 1) The hand washing station as claimed in claim 1, wherein at least part of the heat exchanger has a convex external surface. ### Claim 3 (depends on 2) The hand washing station as claimed in claim 2, wherein said at least part of the heat exchanger has an external surface with 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 directly on to the external surface of the heat exchanger. ### Claim 5 (depends on 1) The hand washing station as claimed in claim 1, wherein the heat exchanger is integral with the receptacle. ### Claim 6 (depends on 1) The hand washing station as claimed in claim 1, wherein the heat exchanger forms at least part of a base of the receptacle. ### Claim 7 (depends on 6) The hand washing station as claimed in claim 6, wherein the drain is located between the heat exchanger and a side wall of the receptacle. ### Claim 8 (depends on 1, 2, 3, 4, 5) The hand washing station as claimed in one of claims 1 to 5, wherein the heat exchanger forms at least part of a side wall of the receptacle. ### Claim 9 (depends on 1) The hand washing station as claimed in claim 1, wherein the fluid conveying system comprises a cooling jacket delimited at least in part by the internal surface of the heat exchanger. ### Claim 10 (depends on 9) The hand washing station as claimed in claim 9, wherein the jacket comprises at least one fluid inlet port. ### Claim 11 (depends on 9) The hand washing station as claimed in claim 9, wherein the jacket comprises a fluid outlet port. ### Claim 12 (depends on 11) The hand washing station as claimed in claim 11, wherein the jacket has a domed section, and the fluid outlet port is located at an apex of the domed section of the jacket. ### Claim 13 (depends on 1) The hand washing station as claimed in claim 1, comprising an outlet conduit for conveying fluid from the fluid conveying system to the fluid dispenser. ### Claim 14 (depends on 13) The hand washing station as claimed in claim 13, comprising a heater for heating fluid located within the outlet conduit. ### Claim 15 (depends on 13) The hand washing station as claimed in claim 13, 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.