Air cooled heat shield
AssigneeThermo-Tec Automotive Products, Inc.
InventorJames E. White
Life of this patent
Estimating the term…
Abstract
A heat shield is disclosed comprising a formed sheet having a thickness, an exterior shielding surface, and an interior shielded surface, wherein the exterior shielding surface comprises a multiplicity of protruding perforations. The protruding perforations comprise protrusions increasing surface area and generating turbulent flow, and small openings through the shield to allow convection air flow to pass through.
Claims18
An apparatus for reducing the transfer of heat from a heat source to a protected object, the apparatus comprising:
- a heat shield having a heat reflective sheet, the sheet having a thickness bounded by a first sheet surface and a second sheet surface, the first sheet surface being configured for exposure to a medium flowing across such surface when the sheet is placed between the heat source and the protected object, the sheeting having a means for providing improved convective heat transfer from the sheet while substantially restricting the passage of the flowing medium and radiant heat through the sheet, the means comprising:
- a plurality of turbulence-generating protrusions having a single free edge and extending from the first sheet surface, the protrusions generating turbulent flow within the medium flowing across the first sheet surface;
- and
- a plurality of sheet apertures formed within the sheet, wherein each aperture is positioned substantially adjacent to at least a portion of one of the protrusions, and each aperture is bounded by a sheet edge and the free edge of the one of the protrusions, the free edge being partially maintained within the thickness of the sheet, wherein each of the plurality of sheet apertures has a length and a width, the width being less than the length and measuring between approximately 0.06 and 0.25 millimeters.
An apparatus for reducing the transfer of heat from a heat source to a protected object, the apparatus comprising:
- a heat source;
- and
- a heat shield having a heat reflective sheet, the sheet having a thickness bounded by a first sheet surface and a second sheet surface, the first sheet surface being configured for exposure to a medium flowing across such surface when the sheet is placed between the heat source and the protected object, the sheeting having a means for providing improved convective heat transfer from the sheet while substantially restricting the passage of the flowing medium and radiant heat through the sheet, the means comprising:
- a plurality of turbulence-generating protrusions having a single free edge and extending from the first sheet surface, the protrusions generating turbulent flow within the medium flowing across the first sheet surface;
- and
- a plurality of sheet apertures formed within the sheet, wherein each aperture is positioned substantially adjacent to at least a portion of one of the protrusions, and each aperture is bounded by a sheet edge and the free edge of the one of the protrusions, the free edge being partially maintained within the thickness of the sheet.
Dependencies are inferred from the claim text.