Patent AU-2005284678-B2 (AU)
Title: Drain back water heater
Inventor: VINCENT BOURKE BRENDAN
IPC: F24H1/18
Filed: 2005-09-13
Granted: 2011-12-15
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date (10) International Publication Number 23 March 2006 (23.03.2006) PCT W O 2006/029457 Al (51) International Patent Classification : F28D 3/00, 24 Bourke Street, North Parramatta, NSW 2151 (AU). F24H 7/00, 1/18, F28F 13/06 HUNT, Steven, Scott [AU/AU]; 26 Paperbark Crescent, (21) International Application Number: Beaumont Hills, NSW 2155 (AU). CHACHATY, Fred, PCT/AU2005/001397 M. [AU/AU]; 5/8A Riverside Crecent, Marrickville, NSW 2204 (AU). (22) International Filing Date: (74) Agent: BORG, Keith, Joseph; Halford & Co, Level 7, 1 13 September 2005 (13.09.2005) Market Street, Sydney, NSW 2000 (AU). (25) Filing Language: English (81) Designated States (unless otherwise indicated, for every (26) Publication Language: English kind of national protection available): AE, AG, AL, AM, (30) Priority Data: AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CI, CN, 2004905356 16 September 2004 (16.09.2004) AU CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, 2005901548 30 March 2005 (30.03.2005) AU GB, GD, GE, GI, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, (71) Applicant (for all designated States except US): RHEEM MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, AUSTRALIA PTY LIMITED [AU/AU]; 1 Alan Street, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, Rydalmere, NSW 2116 (AU). SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, (72) Inventors; and VN, YU, ZA, ZM, ZW. (75) Inventors/Applicants (for US only): BOURKE, Bren- (84) Designated States (unless otherwise indicated, for every dan, Vincent [AU/AU]; 71 Rosedale Road, Gordon, NSW kind of regional protection available): ARIPO (BW, GI, 2072 (AU). ADAM, Quentin, Arthur, Carl [AU/AU]; GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, [Continued on next page] (54) Title: DRAIN BACK WATER HEATER (57) Abstract: A drain back water heater includes 304 a hot water storage tank (100) with an internal heat exchanger (102). The heat exchanger (102) is in the form of a cylinder closed at the top by a cap .(104) 300 and also closed at the base. A pump (110) draws off water from the bottom of the heat exchanger (102) circulates the heat transfer fluid back to the top of the 302 123 heat exchanger at (112) when required. Attached to, or incorporated in the cap 104 is a falling film distrib utor (118) which serves to distribute the heat trans fer fluid in a thin film around the inner wall of the 112 heat exchanger (102). The heat transfer fluid can be 116-- 04 heated in solar water heating panels. When the pump is turned off, the heat transfer fluid drains into the heat 125 118- exchanger to at least partially fill the heat exchanger. h *122 W O 2006/02 9457 A 1 1111111|||||||||||||||||||||||||||||||||111 ||||I|i I||III|I||iiII|Ilii iI 1111111|||||| |||| ZW), Eurasian (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), Published: European (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, - with international search report FR, GB, GR, UIJ, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR), OAPI (BE, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). For two-letter codes and other abbreviations, refer to the "Guid Declaration under Rule 4.17: ance Notes on Codes and Abbreviations" appearing at the begin - of inventorship (Rule 4.1 7(iv))for US only ning of each regular issue of the PCT Gazette.