(19)
(11) EP 4 502 502 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.04.2025 Bulletin 2025/18

(43) Date of publication A2:
05.02.2025 Bulletin 2025/06

(21) Application number: 24191366.4

(22) Date of filing: 29.07.2024
(51) International Patent Classification (IPC): 
F25B 13/00(2006.01)
F25B 25/00(2006.01)
F28D 15/00(2006.01)
 F24D 17/02(2006.01)
F28D 1/04(2006.01)
F25B 39/00(2006.01)
(52) Cooperative Patent Classification (CPC):
F25B 2339/047; F25B 2400/06; F24D 17/02; F28D 1/0408; F25B 30/02; F25B 39/04; F25B 13/00; F25B 39/02; F25B 2339/046; F25B 49/005; F25B 2500/22; F25B 2400/12; F28D 1/06; F28D 20/0039
(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: 01.08.2023 IT 202300016290

(71) Applicant: Ariston S.p.A.
60044 Fabriano (AN) (IT)

(72) Inventors:
  • CANESTRARI, Paolo
    60044 Fabriano (IT)
  • CECCACCI, Lorenzo
    60015 Falconara Marittima (IT)

(74) Representative: Meloni, Francesca 
MAR.BRE S.R.L. Via San Filippo, 2
60044 Fabriano (AN)
60044 Fabriano (AN) (IT)

   


(54) WATER HEATER WITH DOUBLE REFRIGERANT CIRCUIT


(57) The object of the present disclosure is a heating or more generally a storage water conditioning system with a heat pump wherein the heat transfer fluid is divided into at least two distinct and independent refrigerant circuits, between which there is no passage of fluid.
The two circuits define the same heat exchanger body with a tank. It is advantageous to make the exchanger with the micro channel technology which allows greater efficiency and flexibility in designing the heat exchange surfaces for a plurality of circuits on the same tank.
Compared to a single circuit heat pump, one with two distinct circuits and equal overall power, for each circuit it has less fluid charge and less power required to the compressor.
Furthermore, it is more robust with respect to a failure: a hole at any point in the circuit causes the loss of only part of the heat transfer fluid.







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