Thermal management device comprising an indirect air conditioning circuit for a motor vehicle, comprising: - a first, refrigerant, loop in which a refrigerant is intended to circulate, said first refrigerant loop comprising, in the direction in which the refrigerant circulates, a compressor, a two-fluid heat exchanger, a first expansion device, an evaporator, a second expansion device, an evaporator/condenser, and - a first bypass pipe bypassing the evaporator/condenser and comprising a first shut-off valve, - a first internal heat exchanger, allowing an exchange of heat between the high-pressure refrigerant leaving the two-fluid heat exchanger and the low-pressure refrigerant leaving the evaporator/condenser or leaving the first bypass pipe, - a second internal heat exchanger allowing an exchange of heat between the high-pressure refrigerant leaving the first internal heat exchanger and the low-pressure refrigerant circulating in the first bypass pipe, - a second bypass pipe bypassing the first expansion device and the evaporator, said second bypass pipe comprising a third expansion device sited upstream of a cooler, - a second, coolant, loop in which a coolant is intended to circulate, the two-fluid heat exchanger being arranged jointly, on the one hand, on the first refrigerant loop downstream of the compressor, between said compressor and the first expansion device and, on the other hand, on the second coolant loop, characterized in that the indirect air conditioning circuit comprises a tapped-off branch connecting a first junction sited downstream of the two-fluid heat exchanger, between said two-fluid heat exchanger and the first internal heat exchanger, to a second junction sited upstream of the first internal heat exchanger, between said first internal heat exchanger and the first junction, said tapped-off loop comprising a first external radiator, and in that the indirect air conditioning circuit comprises a device for redirecting the refrigerant leaving the two-fluid heat exchanger directly towards the first internal heat exchanger and/or towards the tapped-off branch, and in that said device for redirecting the refrigerant leaving the two-fluid heat exchanger comprises: - a first shut-off valve positioned on the main loop downstream of the first junction, between the first junction and the second junction, and - a second shut-off valve positioned on the tapped-off branch downstream of the first junction, between the first junction and the first external radiator. - a first, refrigerant, loop in which a refrigerant is intended to circulate, said first refrigerant loop comprising, in the direction in which the refrigerant circulates, a compressor, a two-fluid heat exchanger, a first expansion device, an evaporator, a second expansion device, an evaporator/condenser, and - a first bypass pipe bypassing the evaporator/condenser and comprising a first shut-off valve, - a first internal heat exchanger, allowing an exchange of heat between the high-pressure refrigerant leaving the two-fluid heat exchanger and the low-pressure refrigerant leaving the evaporator/condenser or leaving the first bypass pipe, - a second internal heat exchanger allowing an exchange of heat between the high-pressure refrigerant leaving the first internal heat exchanger and the low-pressure refrigerant circulating in the first bypass pipe, - a second bypass pipe bypassing the first expansion device and the evaporator, said second bypass pipe comprising a third expansion device sited upstream of a cooler, - a second, coolant, loop in which a coolant is intended to circulate, - a first shut-off valve positioned on the main loop downstream of the first junction, between the first junction and the second junction, and - a second shut-off valve positioned on the tapped-off branch downstream of the first junction, between the first junction and the first external radiator.