Thermal conditioning circuit

A thermal conditioning system comprising a refrigerant circuit configured to circulate a refrigerant, the refrigerant circuit including:

• a main loop including in succession in the direction of travel of the refrigerant:
• a compression device,
• a condenser configured to exchange heat with a first heat transfer fluid,
• a first expansion device,
• a first evaporator,
• a bypass branch connecting a first junction point positioned on the main loop downstream of the condenser and upstream of the first expansion device to a second junction point positioned on the main loop downstream of the first evaporator and upstream of the compression device, the bypass branch including a second expansion device and a second evaporator,
• wherein the second expansion device is a thermostatic expansion valve configured to vary a flow area for the refrigerant between a minimum flow area and a maximum flow area,
• and wherein the bypass branch includes a flow restriction device configured to limit a flow area for the refrigerant to a value less than the maximum flow area of the second expansion device.