Thermodynamic boiler with thermal compressor

A thermodynamic boiler for exchanging heat with a heating circuit, the boiler comprising:

• a compressible fluid circuit forming part of a reversible heat pump loop;
• a thermal compressor, the thermal compressor acting on a compressible fluid and comprising a first compression stage, with an alternating bi-directional piston separating a first chamber and a second chamber, and a first fuel burner forming a heat source coupled to the first chamber, the thermal compressor forming a compression function of the reversible heat pump loop, the first and second chambers being fluidly connected between each other through a regenerator with a to-and-fro fluid movement;
• a main exchanger forming a thermal interface between the compressible fluid circuit and the heating circuit;
• and
• at least a portion of the heating circuit, wherein the second chamber of the compressor is cooled by a return branch of the at least the portion of the heating circuit.