INTERNAL HEAT EXCHANGER

An internal heat exchanger for an air conditioning system of a vehicle comprising an intermediate portion and two end portions, each of the end portions comprises a first opening for the passage of a first conditioning fluid inside the internal heat exchanger and a second opening for the passage of a second conditioning fluid inside the heat exchanger. The intermediate portion being hollow and defining an inner volume, the intermediate portion further comprising a plurality of ducts housed inside the inner volume extending between the end portions, the first opening being fluidically connected via respective ducts to each of the ducts, the second opening being fluidically connected to the inner volume via an individual duct.