Heat pump

A heat pump comprising a number of hollow elements with a first zone, a second zone and a working medium which can be displaced in a reversible manner between the first and second zone, an equilibrium of an interaction of the working medium with each of the zones depending on thermodynamic state variables, a number of plate elements which are arranged in the form of a stack and each comprise at least one hollow element with a first and second zone, a number of passage regions of a first type arranged between the plate elements to be flowed through by a first fluid for exchanging heat with the first zone, a number of passage regions of a second type arranged between the plate elements to be flowed through by a second fluid for exchanging heat with the second zones, the first fluid and the second fluid being separated from each other, and at least two distributing devices which are arranged at the end of the plate elements in each case and associated with at least a distribution of the first fluid through the passage regions of the first type and each have a stationary hollow cylinder and a distributor insert which is able to rotate in the hollow cylinder, wherein the distributor insert has spirally formed partitions which separate off in each of the cylinders at least four, preferably at least six and particularly preferably at least eight separate helical chambers, a flow path comprising at least one passage region being defined by each of the chambers.