The present invention relates to a thermal management device comprising an indirect air conditioning circuit (1) comprising: - a first refrigerant fluid loop (A) comprising a compressor (3), a bifluid heat exchanger (5), a first cooling device. expansion (7), a first heat exchanger (9), a second expansion device (11), a second heat exchanger (13), and - a first bypass pipe (30), - a second bypass pipe ( 40) comprising a third expansion device (17) arranged upstream of a first cooler (15), - a third bypass pipe (70) comprising a fourth expansion device (77) and a second cooler (75), - a first internal heat exchanger (19), - a second internal heat exchanger (19 '), - a second heat transfer fluid loop (B), the bifluid heat exchanger (5) being arranged jointly on the one hand on the first refrigerant fluid loop (A) before l of the compressor (3), between said compressor (3) and the first expansion device (7), and on the other hand on the second heat transfer fluid loop (B). Figure for the abstract: Fig. 1
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