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(11) | EP 2 535 671 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | System for the refrigeration of a liquid and method for controlling said system |
| (57) A system for the refrigeration of a liquid suitable for circulating between at least
one inlet (1) and at least one outlet (2) of a primary liquid cooling circuit (3),
comprises at least a first air-cooled refrigeration unit (4) having at least a first
air-cooled cooling coil (6) inserted on the primary liquid cooling circuit (3), at
least a second refrigeration unit (5) with a cooling cycle having at least one evaporator
(7) inserted on the primary liquid cooling circuit (3) in cascade with the first air-cooled
cooling coil (6), means for shutting off the first air-cooled cooling coil (6) from
the primary liquid cooling circuit (3), forced air ventilation means suitable for
acting on at least the first air-cooled cooling coil (6) and on at least a second
air-cooled cooling coil (10) provided for at least one condenser of the second refrigeration
unit (5) for condensing the refrigerant fluid operating in the cooling cycle, there
being further provided a secondary liquid circuit (13) on which at least the first
air-cooled cooling coil (6) and at least one secondary exchanger (14) for subcooling
the refrigerant fluid leaving the second air-cooled cooling coil are inserted.
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