Heat exchanger with thermal inertia for a heat transfer fluid circuit, particularly of a motor vehicle

A heat exchanger for a fluid circuit through which a heat transfer fluid runs, comprising:

• at least one manifold delimiting an inlet and an outlet for the heat transfer fluid;
• circulation ducts for the heat transfer fluid which are inserted between the inlet and the outlet;
• heat-exchange surfaces associated with the heat transfer fluid circulation ducts and able to be swept by a flow of air that is to be conditioned;
• cavities designed to contain a heat storage fluid, situated adjacent to the heat transfer fluid circulation ducts;
• and
• a multiplicity of parallel flat tubes having two opposed large faces and in which the ducts and the cavities are formed, and a multiplicity of corrugated inserts forming heat-exchange surfaces, each of which is arranged between two adjacent tubes,
• whereby the cavities associated with the heat-exchange surfaces in such a way that the heat storage fluid is able to exchange heat with the air flow that sweeps the heat-exchange surfaces if the circulation of the heat transfer fluid through the circuit is stopped, and wherein each flat tube is of one piece, the ducts are arranged in groups between the large faces, and the cavities are arranged in groups between the large faces, the groups of ducts alternating with the groups of cavities.