FIELD: transportation.
SUBSTANCE: system contains the first circuit (10), in which the first fluid (F1) passes, and which is preferably the cooling circuit and the second circuit (20) in which the second fluid (F2) passes, and which is preferably the cooling circuit. The circulation system contains the heat exchanger (TO1) in which, depending on the circulation system modes, the first fluid (F1) may be supplied to realise the heat exchange connection to the second circuit (20), and preferably the first fluid may not be supplied to prevent the heat exchange connection to the second circuit (20). The first circuit (10) may contain the expansion element (EO), to which the first fluid (F1) may be supplied, depending on the circulation system modes.
EFFECT: circulation system improvement.
20 cl, 7 dwg
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