Method for controlling a thermal conditioning system

A method for controlling a thermal conditioning system, the thermal conditioning system comprising:

• a heat-transfer liquid circuit which is configured to circulate a heat-transfer liquid;
• and
• a coolant fluid circuit comprising in succession in a direction of flow of the coolant fluid:
• a compressor,
• a first heat exchanger which is configured to supply a first thermal power to a heat-transfer liquid,
• a first expansion valve,
• a second heat exchanger arranged jointly on the coolant fluid circuit and on the heat-transfer liquid circuit, so as to supply a second thermal power to the heat-transfer liquid,
• a second expansion valve, and
• a third heat exchanger;
• the control method comprising:
• receiving a total thermal power set point to be supplied, the total thermal power set point to be supplied being a sum of a first thermal power set point to be supplied to the heat-transfer liquid in the first exchanger, and a second thermal power set point to be supplied to the heat-transfer liquid in the second exchanger;
• controlling a pressure of the coolant fluid in the first exchanger, wherein the sum of the first thermal power supplied and the second thermal power supplied is equal to the total thermal power set point to be supplied;
• and
• controlling a cross-section of passage of the first expansion valve wherein the second thermal power supplied by the second exchanger is equal to the second thermal power set point to be supplied.