The electronic unit

 

The invention relates to electronics and can be used in blocks of electronic equipment to improve cooling efficiency, in particular in the aviation lights - multi-function remote controls. The technical result is an increase cooling efficiency and simplifying the design. Is achieved in that the electronic unit consists of housing, printed circuit boards with radio electronic elements, thermally conductive contact pressure elements, the inner side of the heat exchanger walls are interconnected in the form of a polygonal tube, PCB subunits are located in space similar to and coaxial with the heat exchanger walls, and the PCB subunits are separated from each other at a distance of the height of the radioelements and fixed swivel panel unit, thermally conductive contact pressure elements in the form of flat spring thermal connectors and are located on the outer side of the PCB subunits, and return them to the nest form the corresponding adjacent the inner side of the heat exchanger walls. 5 Il.

The invention relates to electronics and can be used in blocks of electronic equipment in the control.

Known electronic unit (A. C. of the USSR №1051750, IPC H 05 To 7/20, F 25 D 31/00, publ. in bull. No. 40 of 30.10.83), comprising a housing in which is installed the subunits, made in the form of circuit boards with chips mounted on the heat pipes located on the circuit boards and connected to their free ends with the possibility of thermal contact with the heat sinks and diplostomum, and the heat sinks are made in the form of combs, the grooves of which are free ends of the heat pipes.

A disadvantage of the known designs is a small geometric size of the contact that impedes efficient cooling, as well as the complexity of thermal connector.

The closest technical solution, selected as a prototype, is an electronic block (A. C. of the USSR №1512469 chipboard, IPC H 05 7/20), consisting of a body made in the form of a rectangular parallelepiped with a heat exchange wall, the subunits of which are made in the form of printed circuit boards with radio electronic elements, and with the response parts of the electrical connectors on one end sides of the functional cells that are installed in the housing with the possibility of contact pressure elements in thermal contact with at least two other t the sa and electrically connected to the body panel with their mates. The heat exchange wall of the case is made in the form of hollow chambers with internal partitions, communicating their cavities with the cavity of the housing through the vents. Each hollow chamber with partitions formed profiled cladding of sheet material. Contact heat-conductive pressure elements in the form of wedge-shaped spring thermal connectors of the curved plates, the protrusions which are located on the respective end sides of the PCB subunits, and return them nesting on the appropriate adjacent to these end sides of the printed circuit boards on their internal surfaces of the heat exchange walls of the housing. The panel has a hinge with electrical connectors.

The disadvantages of this unit are small geometric size of thermal contact, due to their location on the edges, the complexity of thermal connector is made in the form of a wedge-shaped spring thermal connectors, insufficient thermal contact thermal connector due to the complicated mating angular surfaces, which affects low cooling efficiency.

The technical result of the invention is to improve affectional block, consisting of a body made in the form of a rectangular parallelepiped with a heat exchange wall, the subunits of which are made in the form of printed circuit boards with radio electronic elements that are installed in the housing with the possibility of contact pressure elements in thermal contact with at least the other two face sides of their PCB subunits with the respective adjacent heat exchange walls of the casing and electrically connected to the body panel with their mates, and the inner side of the heat exchanger walls form a hollow chamber with interior walls, interconnected by their cavities with the cavity of the housing through the vents, heat-conductive contact pressure elements made in the form of spring thermal connectors, protruding parts which are located on the respective end sides of the PCB subunits, and return them nesting parts which are appropriate adjacent to these end sides of the printed circuit boards on their internal surfaces of the heat exchange walls of the housing, and the panel has a hinge, the heat exchange walls of the body are interconnected in the form of polygonal tubes, printed Enki are coaxial, and the PCB subunits are separated from each other at a distance of the height of the radioelements and fixed swivel panel unit with the ability to store thermal contact with a heat exchange walls and electrical connection through a flexible printed circuit Board as a unit, and between circuit boards subunits, thermally conductive contact pressure elements in the form of flat spring thermal connectors, plane thermal contact which is filled with thermally conductive springy mass, and are located on the outer side of the PCB subunits, and return them to the nest form the corresponding adjacent the inner side of the heat exchange walls of the output part of the spring thermal connectors to the external environment through the holes in the heat exchanger walls.

The invention consists in that in case the inner side of the heat exchanger walls are interconnected in the form of a polygonal tube, PCB subunits are located in the space similarly, when this PCB subunits and heat exchanger walls are coaxial, and the PCB are separated from each other at a distance of the height of the radioelements and fixed hinged panel unit and who the PCB as a unit, and between circuit boards subunits, thermally conductive contact pressure elements in the form of flat spring thermal connectors, plane thermal contact which is filled with thermally conductive springy mass, and are located on the outer side of the PCB subunits, and return them to the nest to form the inner side of the heat exchange walls of the output part of the spring thermal connectors to the external environment through the holes in the heat exchanger walls, thereby enhancing the cooling efficiency and simplified the design by using the entire area of the circuit Board and the heat transfer walls for heat dissipation; the possibility of release of the spring thermal connectors to the external environment, and the use of thermally conductive springy mass in thermal contact allows to obtain more reliable, simple thermal contact.

The drawings show a proposed electronic unit, where Fig.1 is a block assembled with one embodiment, the heat exchange walls of the casing, while the heat transfer wall is conventionally separated to illustrate the direction of passage of the cooling air flows; Fig.2 - Fig.1 is in the open position; Fig.3 - pin heat sink connector; f is atom position, where the following notation:

1 - body;

2 - flexible printed circuit Board;

3 - panel;

4 - heat transfer wall;

5 - PCB;

6 - polygonal pipe;

7 - hinge;

8 - thermal spring connectors;

9 - elektroradioelementy;

10 - plane thermal contact;

11 - heat-conductive springy mass;

12 is a hollow chamber;

13 is an external side of the PCB;

14 - face side of the PCB;

15 - inner side of the heat transfer wall;

16 - part thermal spring connectors that go into the environment;

17 - hole in the heat exchange wall for release of the spring thermal connectors;

18 - vents;

19 - the body cavity.

The electronic unit includes a housing 1 (Fig.1) made in the form of a rectangular parallelepiped with a flexible printed boards 2 on one of its panels 3 and with a heat exchange wall 4(Fig.4), the subunits of which is designed as a printed circuit Board 5 with radio electronic elements 9 and electrically connected each flexible circuit boards 2 to panel 3. In the case of heat-exchange wall 4 are connected in the form of a polygonal tube 6, the circuit Board 5 subunits are located in the space similarly, when pecat is and the distance of the height of the radioelements and pinned hinge 7 panel 3 unit with the ability to store thermal contact with a heat exchange wall 4 and an electric connection through a flexible printed circuit Board 2 as a unit, and between circuit boards 5 subunits. Contact heat-conductive clamping elements 8 (Fig.3) thermal contact of the printed circuit Board 5 subunits in the form of flat spring thermal connectors 8, the plane of thermal contact 10 which is filled thermally conductive springy mass 11 type Elastosil 137-182, and located on the outer side 13 (Fig.4) printed circuit boards 5 subunits and at least two end sides 14 of their printed circuit boards 5 subunits. Return slots to form respective adjacent inner side 15 of the heat exchange walls 4 output side connectors 16 to the external environment through the holes 17 in heat exchange walls 4. The inner side 15 of the heat exchange walls 4 form a hollow chamber 12 with the outer sides 13 of the printed circuit Board 5 subunits, communicating their cavities with the cavity of the housing 19 through the ventilation holes 18.

The electronic unit operates as follows.

Heat exchanger wall 4 of the housing 1 are connected in the form of a polygonal tube 6, the circuit Board 5 subunits are located in the space similarly, when the circuit Board 5 subunits and the heat exchange wall 4 are coaxial, and the circuit Board 5 are separated from teplovogo contact with a heat exchange wall 4 and an electric connection through a flexible printed circuit Board 2 with the panel 3 blocks and between circuit boards 5 subunits, thermally conductive contact pressure elements of printed circuit boards 5 subunits in the form of flat spring thermal connectors 9, the plane of thermal contact 10 which is filled thermally conductive springy mass 11, and located on the outer side 13 of the printed circuit Board 5 subunits. Spring thermal connectors 8 are in contact with the inner surfaces of the heat exchanger walls, giving them warmth. The cooling occurs through the exposed part of the spring thermal connectors to the external environment. Performing thermal connectors flat and the use of thermally conductive spring material, as the working surface provides the necessary contact pressure increases the contact reliability and increases the cooling efficiency.

Claims

The electronic unit consisting of a body made in the form of a rectangular parallelepiped with a heat exchange wall, the subunits of which are made in the form of printed circuit boards with radio electronic elements that are installed in the housing with the possibility of contact pressure elements in thermal contact with at least the other two face sides of their PCB subunits from scusa their mates, moreover, the inner side of the heat exchanger walls form a hollow chamber with interior walls, interconnected by their cavities with the cavity of the housing through the vents, heat-conductive contact pressure elements made in the form of spring thermal connectors protruding parts which are located on the respective end sides of the PCB subunits, and return them nesting parts which are appropriate adjacent to these end sides of the printed circuit boards on their internal surfaces of the heat exchange walls of the housing, and the panel has a hinge, characterized in that in the above case the inner side of the heat exchanger walls are interconnected in the form of a polygonal pipe, PCB subunits are located in the space similarly, when this PCB subunits and heat exchanger walls are coaxial, and the PCB subunits are separated from each other at a distance of the height of the radioelements and fixed swivel panel unit with the ability to store thermal contact with a heat exchange walls and electrical connection through a flexible printed circuit Board as a unit, and between circuit boards sub, locost thermal contact which is filled with thermally conductive springy mass, and are located on the outer side of the PCB subunits, and return them to the nest form the corresponding adjacent the inner side of the heat exchange walls of the output part of the spring thermal connectors to the external environment through the holes in the heat exchanger walls.

 

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