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(11) | EP 1 039 236 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Storage boiler of the combined type |
| (57) A storage boiler (1) of the so-called combined type, comprises a secondary heat exchanger
(4) provided with respective first thermal exchange means for heating sanitary water
supplied to said exchanger (4), a unit (5) for producing and storing hot sanitary
water provided with respective second thermal exchange means (19) for heating the
sanitary water stored within said unit (5), and a secondary hydraulic circuit (20)
for the circulation of sanitary water, provided with means (27) for selectively drawing
off the sanitary water heated by said secondary heat exchanger (4) and/or by said
unit (5) for producing and storing hot sanitary water. The storing unit (5) is arranged
in the secondary hydraulic circuit (20) for the circulation of sanitary water in parallel
to the secondary heat exchanger (4). In the boiler of the invention the second thermal
exchange means (19) provided in the unit (5) for producing and storing hot sanitary
water is essentially in parallel to the first thermal exchange means, so that heating
of the unit (5) for producing and storing hot sanitary water may be independently
carried out with respect to the secondary heat exchanger (4). |