Dynamic heat exchanger (1) comprises a drive shaft (4) drivable by a drive, and mixing tools (5) which are connected to the drive shaft, for mixing the confectionery mass during its passage through the heat exchanger, an input (8), through which the confectionery mass is introducible into the heat exchanger, an output (9), through which the confectionery mass processed in terms of temperature, exits from the heat exchanger, a container, into which a cleaning composition is fillable, a first conduit, which connects the container to the input, and a pump for conveying the cleaning composition. Dynamic heat exchanger (1) comprises (a) a drive shaft (4) drivable by a drive, and mixing tools (5), which are connected to the drive shaft, for mixing confectionery mass during its passage through the heat exchanger, (b) an input (8), through which the confectionery mass is introducible into the heat exchanger, (c) an output (9), through which the confectionery mass processed in terms of temperature, can exit from the heat exchanger, (d) a container, into which a cleaning composition is fillable, (e) a first conduit which connects the container to the input, thus the cleaning composition is conveyable by a first conveying direction from the input towards the output by the heat exchanger, (f) a second conduit, which connects the container to the output in such a manner that the cleaning composition is conveyable in a second conveying direction, from the output towards the input by the heat exchanger, and (g) a pump for conveying the cleaning composition by the heat exchanger, where the pump is designed and arranged in such a manner that the cleaning composition with at least double the volume flow as compared to the volume flow of the confectionery mass, is conveyable by the heat exchanger. Independent claims are also included for: (1) a cleaning device for cleaning the above dynamic heat exchanger (2) cleaning the above dynamic heat exchanger comprising (i) charging a cleaning
