Heat exchanger, heating and/or air conditioning apparatus and vehicle including such a heat exchanger

A heat exchanger including a number of ducts for the flow of a cooling fluid, which are connected in series, each duct being produced as a pair of plates comprising a concave region delimited by an edge and provided with a number of bosses forming dimples wherein a random distribution of the dimples is used and includes dimples each having a shape chosen randomly from a set of different shapes of dimple, and wherein the surface area defined by the sum of the surface areas of each cross- section of the dimples is less than 20% of the total surface area of the ducts.

Air conditioning and/or heating system for a motor vehicle, which includes a sealed circuit for circulating a cooling fluid comprising a heat exchanger including a number of ducts for the flow of a cooling fluid, which are connected in series, each duct being produced as a pair of plates comprising a concave region delimited by an edge and provided with a number of bosses forming dimples wherein a random distribution of the dimples is used and includes dimples each having a shape chosen randomly from a set of different shapes of dimple.

Motor vehicle which includes an air conditioning system which includes a sealed circuit for circulating a cooling fluid comprising a heat exchanger including a number of ducts for the flow of a cooling fluid, which are connected in series, each duct being produced as a pair of plates comprising a concave region delimited by an edge and provided with a number of bosses forming dimples wherein a random distribution of the dimples is used and includes dimples each having a shape chosen randomly from a set of different shapes of dimple.