Absorption-type refrigeration system with thermal energy recovery, particularly for vehicles provided with an internal combustion engine

An absorption-type vehicle refrigeration system with thermal energy recovery, for vehicles provided with an internal combustion engine having a cooling system containing an engine cooling liquid, comprising a vapour generator connected to a condenser which is itself connected, by way of a pressure reduction valve, to an evaporator connected to an absorber which receives liquid present in a lower zone of the generator and from which the liquid is fed to an upper zone of the generator, there being provided in the generator a heat exchanger connected to the engine cooling system and through which the engine cooling liquid flows, the engine cooling liquid flowing through the heat exchanger constituting the primary source of heat for operating the generator, the generator and absorber containing a refrigerant fluid and an absorbent fluid, the absorbent fluid being able to absorb or dissolve the refrigerant fluid, which can itself be distilled or separated from the absorbent fluid by the addition of heat which is supplied to the generator by the heat exchanger in the generator, and be condensed and vaporised under the temperature and pressure conditions prevailing in the condenser and evaporator, respectively, and the absorber and the generator including means for precluding displacement of the absorbent fluid and the refrigerant fluid from respective portions of the refrigeration system as a result of vehicle movements so as to cause consequent inversion of the system operating cycle.