Device and use thereof for the UV treatment of fluids

A device for treating fluids, the device comprising:

• a flow-through housing with a cover, an inlet, a reactor chamber with inner walls and an outlet;
• ultra-violet light emitting device (UV LED) radiation sources directed into said reactor chamber and a power supply for said radiation sources;
• said reactor chamber defining a free interior space and having inner walls surrounding said interior space and having a flow-related design configured to impart a rotating fluid vortex to a fluid flowing therethrough;
• radiation sources arranged in the fluid on or in an inner wall and directed to radiate radially from the outside inward and/or laterally onto the fluid vortex, and wherein at least a partial stream of the fluid in the fluid vortex passes by said radiation sources a plurality of times before leaving said reactor chamber via said outlet;
• and
• wherein one or more radiation sources are arranged on individual plug-in cards, said flow-through housing and/or said cover are formed with slots for receiving said plug-in cards, and said slots contain contacts for supplying power to said radiation sources.