Electronic control with heat sink
First Claim
Patent Images
1. An electronic control comprising:
- a printed circuit board made of electrically insulating material and having circuitry thereon including at least one electrical component which generates heat in operation that must be dissipated to prevent failure, the heat-generating electrical component being mounted on a first face of the printed circuit board;
a heat sink for transferring heat from the heat-generating electrical component on the printed circuit board, the heat sink comprising a plate made of thermally conductive material, the plate including a depression having a bottom wall lying generally in a plane, at least portions of the plate adjacent to the depression being disposed out of the plane to one side thereof;
the heat sink being disposed adjacent to a second face of the printed circuit board, the bottom wall of the depression being in thermal contact with the second face of the printed circuit board generally opposite the heat-generating electrical component on the first face of the printed circuit board, the heat sink and printed circuit board being constructed and arranged for transferring heat through the printed circuit board generally from the first face to the second face and thence to the heat sink, the printed circuit board electrically isolating the heat sink from the circuitry on the printed circuit board.
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Abstract
An electronic control has a heat sink which is electrically isolated from electrical components mounted on a printed circuit board of the control by the printed circuit board itself. Thus, the use of additional materials which are thermally conductive but electrically insulating is avoided. A distributor sheet on the printed circuit board distributes heat substantially uniformly over its surface where contacted by the heat sink to promote heat transfer. The heat sink is shaped to permit devices to be mounted on the same side of the printed circuit board as the heat sink while avoiding contact with the heat sink.
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Citations
17 Claims
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1. An electronic control comprising:
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a printed circuit board made of electrically insulating material and having circuitry thereon including at least one electrical component which generates heat in operation that must be dissipated to prevent failure, the heat-generating electrical component being mounted on a first face of the printed circuit board; a heat sink for transferring heat from the heat-generating electrical component on the printed circuit board, the heat sink comprising a plate made of thermally conductive material, the plate including a depression having a bottom wall lying generally in a plane, at least portions of the plate adjacent to the depression being disposed out of the plane to one side thereof; the heat sink being disposed adjacent to a second face of the printed circuit board, the bottom wall of the depression being in thermal contact with the second face of the printed circuit board generally opposite the heat-generating electrical component on the first face of the printed circuit board, the heat sink and printed circuit board being constructed and arranged for transferring heat through the printed circuit board generally from the first face to the second face and thence to the heat sink, the printed circuit board electrically isolating the heat sink from the circuitry on the printed circuit board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Electrical apparatus comprising:
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a printed circuit board made of electrically insulating material and having circuitry thereon including at least one electrical component which generates heat in operation that must be dissipated to prevent failure, the heat-generating electrical component being mounted on a first face of the printed circuit board; a heat sink for transferring heat from the heat-generating electrical component on the printed circuit board, the heat sink comprising a plate made of thermally conductive material, the plate including a depression having a bottom wall lying generally in a plane, at least portions of the plate adjacent to the depression being disposed out of the plane to one side thereof; the heat sink being disposed adjacent to a second face of the printed circuit board, the bottom wall of the depression being in thermal contact with the second face of the printed circuit board generally opposite the heat-generating electrical component on the first face of the printed circuit board, the heat sink and printed circuit board being constructed and arranged for transferring heat through the printed circuit board generally from the first face to the second face and thence to the heat sink, the printed circuit board electrically isolating the heat sink from the circuitry on the printed circuit board. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification