Heater assembly for deicing and/or anti-icing a component
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second embodiment
[0030]FIG. 1B is a schematic cross-sectional view of electrothermal heater assembly 20 in accordance with the present invention. Heater assembly 20 includes densely woven fabric layer 22, which is impregnated with a high-temperature resin, and metallic heating elements 24, which are adhered to fabric layer 22 with the high-temperature resin. Fabric layer 22 is similar to fabric layer 12 of heater assembly 10 of FIG. 1, and heating elements 24 are similar to heating elements 14 of heater assembly 10. Rather than using a separate layer of adhesive (e.g., adhesive 16 of heater assembly 10 of FIG. 1A), the high-temperature resin that impregnates fabric layer 22 also adheres metallic heating elements 24 to fabric layer 22. Although the high-temperature resin adheres metallic heating elements 34 and fabric layer 22, the resin is not a distinct layer. In one method of forming heater assembly 20, heating elements 24 may be positioned next to a ply of material that forms fabric layer 22. A h...
third embodiment
[0031]FIG. 1C is a schematic cross-sectional view of electrothermal heater assembly 30 in accordance with the present invention. Heater assembly includes fabric layers 32 and 36 and heating elements 34, which are adhered to fabric layers 32 and 36 with a high-temperature resin. Fabric layers 32 and 36 are similar to fabric layers 12 and 22 of FIGS. 1A and 1B, respectively, and heating elements 34 are similar to heating elements 14 and 24 of FIGS. 1A and 1B, respectively. Heater assembly 30 is similar to heater assembly 20 of FIG. 1B, except that second fabric layer 36 is adhered to heating elements 34. If fabric layers 32 and 36 are electrically insulative and heater assembly 30 is embedded into or attached to an external surface of electrically conductive component, fabric layers 32 and 36 electrically insulate the electrically conductive component from heating elements 34.
[0032] A method similar to the method discussed above in reference to heater assembly 20 may be used to form h...
first embodiment
[0033] heater assembly 10 (FIG. 1A) may also be modified to include a second fabric layer to electrically insulate heating elements 14. However, because a separate thermoset adhesive 16 is used in heater assembly 10, a second layer of thermoset adhesive is used to adhere heating elements 14 to the second fabric layer.
[0034] A heater assembly in accordance with the present invention (e.g., heater assemblies 10,20 and 30) may be embedded in a composite component. FIG. 2 illustrates an embodiment of a composite component that includes a heater assembly. FIG. 2 is a perspective view of airfoil 40, where a portion of body 41 of airfoil 40 has been cutaway along leading edge 42 to expose heater assembly 44. Body 41 of airfoil 40 is a composite structure, and heater assembly 44 is embedded in body 41 as part of the composite. Heater assembly 44 is similar to heater assembly 10 of FIG. 1A, and includes fabric layer 46 embedded with a high-temperature resin and heating elements 48 (in phanto...
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Abstract
Description
Claims
Application Information
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