Knurr-mechanik Fur Die Elektronik Aktiengesellschaft

Knuerr-mechanik Fur Die Elektronik Aktiengesellschaft

Josef Neblich

Werner Spateneder

Helmut Heckner

Thomas Rickinger

Hans Flamme

Wolfgang Paggen

Petra Eder

A device for ventilating electronic and electrical equipment, subassemblies and components, which are placed in casings, cabinets and subassembly carriers. The device is particularly suitable for slide-in fan modules, which are equipped with axial flow fans and positioned at a relatively small distance from a reception space for the electrical and electronic equipment, etc. to be ventilated. Between the objects to be cooled and the fan unit is provided an air distribution plate, which has punched out air passage openings. In order to achieve a diffuser action and partial direction change of an air volume flow, air deflecting surfaces with a predeterminable inclination and in clearly defined areas are formed by a punching and bending process.

Means for the ventilation of electrical and electronic equipment and

A contact element is used for anticipatory earthing of a plug-in module during insertion in guides of a casing or a modular chassis up to plugging in. In order to ensure a reliable and effective protective earthing and a very early conducting away of electrostatic charges during the plugging-in process, a contact element is provided with a clamping area and a holding area. The clamping area is constructed for contact engagement on a circuit board and the holding area is constructed for retaining the contact element on a cross extrusion of the casing or the modular chassis.

Contact element for anticipatory earthing

The frame has a reception area for receiving plug-in cards or circuit boards and a forced ventilation for the reception area. The forced ventilation is provided by a blower arrangement, as well as an air distributor and air collector, by which a vertical cooling air flow through the gaps of the plug-in cards is produced. The air distributor and air collector are juxtaposed in the depth of the frame and separated from one another by a cooling baffle passing diagonally from top to bottom. The outlet-side opening of the distirbutor is located in the frame cover. When several frames are stacked, this opening cooperates with an inlet arranged in the bottom of the frame for the reception area of the frame place at the top.

Frame for circuit boards with electronic components

Growing community of inventors

Wartenberg, Germany

Josef Neblich