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US 10,378,751 B2Granted
Heat sink, corresponding lighting device and method of use
AssigneeOSRAM GmbH
InventorsAlessandro Bizzotto, Marco Munarin, Nicola Schiccheri
Life of this patent
Estimating the term…
Abstract
Accroding to the present disclosure, a heat sink, which may be used e.g. for LED lamps or bulbs for motor vehicle lights, includes: a plate-like portion extending along an axis with opposed mounting surfaces for at least one heat source, such as e.g. a LED lighting source, and a finned portion thermally coupled with the plate-like portion and including a plurality of annular fins extending around said axis.
Claims12
A heat sink, including:
- a plate-like portion extending along an axis and having opposed mounting surfaces for at least one heat source,
- a finned portion thermally coupled with the plate-like portion and including a plurality of annular fins extending around said axis, and
- tapered fluid flow channels between the fins of said plurality of annular fins, said tapered fluid flow channels extending between first and second sides of the finned portion, said first and second sides opposed in a diametral direction of said finned portion, wherein said tapered fluid flow channels have wider fluid inflow ends at said first side of the finned portion and narrower fluid outflow ends at said second side of the finned portion.
A lighting device, including:
- a heat sink, wherein the heat sink includes,
- a plate-like portion extending along an axis and having opposed mounting surfaces for at least one heat source,
- a finned portion thermally coupled with the plate-like portion and including a plurality of annular fins extending around said axis, and
- tapered fluid flow channels between the fins of said plurality of annular fins, said tapered fluid flow channels extending between first and second sides of the finned portion, said first and second sides opposed in a diametral direction of said finned portion, wherein said tapered fluid flow channels have wider fluid inflow ends at said first side of the finned portion and narrower fluid outflow ends at said second side of the finned portion,
- the lighting device further including an electrically powered light radiation source, mounted at least one of said opposed surfaces of the plate-like portion.
2 more elements
A method of using a heat sink, wherein the heat sink includes,
- a plate-like portion extending along an axis and having opposed mounting surfaces for at least one heat source,
- a finned portion thermally coupled with the plate-like portion and including a plurality of annular fins extending around said axis, and
- tapered fluid flow channels between the fins of said plurality of annular fins, said tapered fluid flow channels extending between first and second sides of the finned portion, said first and second sides opposed in a diametral direction of said finned portion, wherein said tapered fluid flow channels have wider fluid inflow ends at said first side of the finned portion and narrower fluid outflow ends at said second side of the finned portion,
- the method including,
- arranging said heat sink with said axis arranged horizontally and said plate-like portion arranged vertically, and
- arranging said heat sink with said second side of the finned portion arranged above said first side of the finned portion.
3 more elements
A method of using a lighting device, wherein the lighting device includes,
- a heat sink, wherein the heat sink includes a plate-like portion extending along an axis and having opposed mounting surfaces for at least one heat source, a finned portion thermally coupled with the plate-like portion and including a plurality of annular fins extending around said axis, and tapered fluid flow channels between the fins of said plurality of annular fins, said tapered fluid flow channels extending between first and second sides of the finned portion, said first and second sides opposed in a diametral direction of said finned portion, wherein said tapered fluid flow channels have wider fluid inflow ends at said first side of the finned portion and narrower fluid outflow ends at said second side of the finned portion, wherein said plate-like portion extends parallel to said diametral direction, and
- an electrically powered light radiation source mounted at least one of said opposed surfaces of the plate-like portion,
- the method including,
- arranging said heat sink with said axis arranged horizontally and said plate-like portion arranged vertically, and
- arranging said heat sink with said second side of the finned portion arranged above said first side of the finned portion.
2 more elements
Dependencies are inferred from the claim text.