EP 2199693 A1 20100623 - Heat exchanger and hot water supply apparatus using the same
Title (en)
Heat exchanger and hot water supply apparatus using the same
Title (de)
Wärmetauscher und Warmwasserversorgungsvorrichtung damit
Title (fr)
Échangeur thermique et appareil d'alimentation en eau chaude doté de celui-ci
Publication
Application
Priority
JP 2008313386 A 20081209
Abstract (en)
An heat exchanger and hot water supply apparatus using the same can avoid the blocking of flow by means of stacking of scale without forming whole of the outer pipe or the downstream side of the outer pipe using the larger diameter pipe. The number of the first inner pipes 51, which are disposed on downstream side of the hot water, is smaller than the number of the second inner pipes 52, which are disposed on upstream side of the hot water. By this, it is secured that the sectional area for flowing water between the first outer pipe 53 and each of the inner pipes 51 becomes larger than that between the second outer pipe 54 and each of the second inner pipes 52. Therefore, it is not necessary that the outer pipes 53, 54 or downstream side of the outer pipe 53 is made of a larger diameter pipe. Moreover, the first and second inner pipes 51, 52 are made of copper alloy pipes having a composition comprising, by mass, 0.005 to 0.2 % Zirconium (Zr), 0.05 to 3.0% Tin (Sn), 0.001 to 0.2 % Phosphorus (P), 0.05 to 5.0% Zink (Zn), and the balance copper (Cu) with inevitable impurities. By this, it is possible to prevent the piling up of the scale onto the inner pipes 51, 52.
IPC 8 full level
F24D 17/02 (2006.01); F28D 7/00 (2006.01); F28D 7/02 (2006.01); F28D 7/10 (2006.01); F28F 19/00 (2006.01); F28F 21/08 (2006.01)
CPC (source: EP)
F24D 19/0092 (2013.01); F24H 1/54 (2022.01); F28D 7/0066 (2013.01); F28D 7/0075 (2013.01); F28D 7/022 (2013.01); F28D 7/10 (2013.01); F28F 19/00 (2013.01); F28F 21/085 (2013.01); F24D 2200/12 (2013.01); F24D 2220/08 (2013.01)
Citation (search report)
- [YA] US 2005150638 A1 20050714 - IRITANI YOICHIRO [JP], et al
- [Y] US 3392016 A 19680709 - OPIE WILLIAM R, et al
- [A] US 2003209345 A1 20031113 - ZWEIG MARK ALAN [US]
- [A] DE 3114297 A1 19821104 - FROELING KESSEL APP [DE]
- [A] ES 2234398 A1 20050616 - VALEO TERMICO SA [ES]
- [A] JP 2005291684 A 20051020 - MATSUSHITA ELECTRIC IND CO LTD
- [PA] WO 2009125700 A1 20091015 - SANDEN CORP [JP], et al
- [PA] JP 2008309361 A 20081225 - PANASONIC CORP, et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
DOCDB simple family (application)
EP 09178235 A 20091207; JP 2008313386 A 20081209