HEAT EXCHANGER

The invention relates to a heat exchanger which has at least one first Peltier element. The Peltier element has a first semiconductor arrangement and at least one second semiconductor arrangement. Each semiconductor arrangement has a first semiconductor, a second semiconductor, and an electric contact. At least one semiconductor of each semiconductor arrangement is made of a p-doped semiconductor material, and at least one semiconductor of each semiconductor arrangement is made of an n-doped semiconductor material. One n-doped semiconductor and one p-doped semiconductor are electrically connected in series in an alternating manner within each semiconductor arrangement, and a voltage can be applied to said semiconductors via the electric contact. The invention is characterized in that the two semiconductor arrangements are electrically connected to each other in parallel.