(19)
(11) EP 1 298 395 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.01.2004 Bulletin 2004/03

(43) Date of publication A2:
02.04.2003 Bulletin 2003/14

(21) Application number: 02021700.6

(22) Date of filing: 27.09.2002
(51) International Patent Classification (IPC)7: F24D 17/02, F24D 19/10, F24H 4/04, F24H 9/20
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 28.09.2001 JP 2001302126

(71) Applicant: Daikin Industries, Ltd.
Osaka-shi, Osaka 530-8323 (JP)

(72) Inventors:
  • Sakamoto, Shinichi, c/o Daikin Industries, Ltd.
    Kusatsu-shi, Shiga 525-0044 (JP)
  • Kataoka, Hidehiko, c/o Daikin Industries, Ltd.
    Kusatsu-shi, Shiga 525-0044 (JP)

(74) Representative: Laufhütte, Dieter, Dr.-Ing. et al
Lorenz-Seidler-Gossel Widenmayerstrasse 23
80538 München
80538 München (DE)

   


(54) Heat pump type hot water supply system


(57) A heat pump type hot water supply system includes a hot water storage tank (3), and a circulation line (12) connecting a water outlet (10) at the lower part of the storage tank (3) and a hot water inlet (11) at the upper part thereof. The circulation line (12) is provided partway therealong with a heat exchange line (14) to be heated by a heat pump heat source. The system is configured to return hot water heated up in the heat exchange line (14) to the hot water storage tank (3) through the hot water inlet (11). When the heated water temperature of the heat exchange line (14) is equal to or below a set point, the return of the water to the hot water storage tank (3) through the hot water inlet (11) is hindered, and when the heated temperature of the heat exchange line (14) is above the set point, the outgoing water from the heat exchange line (14) is returned to the hot water storage tank (3) through the hot water inlet (11).






Search report