Refrigerated grinder

A grinder for beans of plant-based products, whose powder is adapted for use in preparing beverages, comprising:

• a grinding chamber defined by a first cylindrical wall extending between a bottom and a top;
• a pair of opposed grinding wheels, including a rotating grinding wheel, and which are located in said grinding chamber;
• an electric motor for driving the rotating grinding wheel;
• a hopper for loading the beans to be ground within the grinding chamber;
• an outlet channel for unloading a ground product out of said chamber;
• a first cooling duct extending around said first cylindrical wall between a first inlet and a first outlet;
• a temperature sensor located in said first cooling duct;
• a first tubular circuit extending between said first inlet and said first outlet, said first tubular circuit being in hydraulic communication with said first cooling duct and having a first heat dissipating fluid flowing therethrough, said first tubular circuit comprising a first motor pump for circulating the first heat dissipating fluid in said first tubular circuit and in said first cooling duct, a first heat dissipater, and a first valve member;
• and
• an electronic control unit, for actuating said motor pump and for turning on said first heat dissipater according to a value of temperature sensed by said temperature sensor, said first cooling duct being formed within a thickness of the cylindrical wall and comprising a first series of pairs of axial recesses formed in the thickness of the first cylindrical wall, connected together by first circumferential passageways and separated by first axial ribs, said first circumferential passageways being closed by first plate-like members and first seal elements.