Device in the thermoelectric heaters/coolers

A device in thermoelectric heaters/coolers, comprising at least one thermoelectric block of the Peltier type having planar heat transfer surfaces and heat exchanging means consisting of metallic convector elements, a current of forced air provided by a fan sweeping over said heat exchanging means, at least on one side of he block, characterized in that said convector element is formed by a plurality of squarely cut, extruded profile members having planar faces extending longitudinally alongside the thermoelectric blocks, said profile members being provided with fins and channels, said fan being an axial fan having an impeller spanning the major portion of the convector element cross-sectional area, said profile members being encompassed by a longitudinal wall structure defining an elongated channel for rectilinearly conducting air flow from said fan through said fins, said convector element being provided with means to retain the fan unit in position, and oppositely directed planar faces of the hear conducting material of the thermoelectric block being positioned to have an extensive heat-transfer contact with the corresponding longitudinal planar faces of the associated convector profile member, said planar faces of said thermoelectric block and said convector profile members planar faces extending in mutual parallel mating relationship, and said profile members being encompassed by a longitudinal wall structure defining an elongated channel means for rectilinearly conducting air flow from said fan through said fins parallel to the profile member planar faces.