(19)
(11) EP 4 474 731 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.02.2025 Bulletin 2025/09

(43) Date of publication A2:
11.12.2024 Bulletin 2024/50

(21) Application number: 24175352.4

(22) Date of filing: 13.05.2024
(51) International Patent Classification (IPC): 
F25B 13/00(2006.01)
F25B 49/02(2006.01)
F24D 19/10(2006.01)
 F25B 25/00(2006.01)
F24D 11/02(2006.01)
(52) Cooperative Patent Classification (CPC):
F25B 13/00; F25B 25/005; F25B 49/02; F25B 2700/21161; F25B 2700/21171; F25B 2313/003; F24D 11/0214; F24D 19/1072; F24D 17/02; F24D 2200/123; F24H 15/38
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH MA MD TN

(30) Priority: 17.05.2023 JP 2023081672

(71) Applicant: Toshiba Carrier Corporation
Saiwai-ku Kawasaki-shi Kanagawa 212-8585 (JP)

(72) Inventors:
  • YAMAZAKI, Yoshiteru
    Shizuoka, 4168521 (JP)
  • HANDA, Makoto
    Shizuoka, 4168521 (JP)

(74) Representative: Gramm, Lins & Partner Patent- und Rechtsanwälte PartGmbB 
Frankfurter Straße 3c
38122 Braunschweig
38122 Braunschweig (DE)

   


(54) HEAT SOURCE SYSTEM AND INDOOR UNIT OF HEAT SOURCE SYSTEM


(57) A heat source system S includes: an indoor unit 1 that includes an expansion tank 12 and a pump 11 configured to circulate utilization fluid; and an outdoor unit 2 that includes a refrigeration cycle apparatus. The refrigeration cycle apparatus includes a water heat exchanger 21 that exchanges heat between a refrigerant and the utilization fluid, and is configured such that the refrigerant circulates through the water heat exchanger 21. The indoor unit 1 is connected to the outdoor unit 2 via a relay pipe Pi, and also connected to a utilization device 4 via an outgoing pipe Pf so that the utilization fluid having passed through the water heat exchanger 21 is supplied to the utilization device 4 via the relay pipe Pi, the indoor unit 1, and the outgoing pipe Pf. A return pipe Pr for introducing the utilization fluid after use in the utilization device 4 into the outdoor unit 2 is directly connected to the outdoor unit 2 without passing through the indoor unit 1.







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