Device for the removal of the ice formed on the surface of a wall, notably an optical or radio-electrical window
First Claim
1. A device to eliminate ice formed on the surface of a wall of an optical or radio-electric window, comprising:
- a self-supporting piezoelectric material forming at least a portion of said wall chosen from among the ferroelectric polymers of the group comprising PVF2, PVF2 -TrFE, PVDCN-VAc, PVF2 -TFE and the mixture of these polymers with one another and/or with PMMA or PEMA, said piezoelectric material having a vibrating active surface that mechanically vibrates to eliminate ice on said wall, andmeans for polarizing said piezoelectric material, comprising an AC voltage source and electrodes made of a material of the group comprising resistive indium-tin oxide, polymers that are conductive in a matrix, hydrogenated amorphous silicon and polyimides charged with organic salts, the electrodes being in contact with said piezoelectric material according to a geometry for generating an acoustic wave having a direction of vibration which is oriented longitudinally and/or transversally to said surface to be de-iced, the amplitude of said vibration being sufficient to respectively detach and/or break the deposit of ice formed on said surface.
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Accused Products
Abstract
A device to eliminate ice formed on the surface of a wall, notably on the surface of an optical or radio-electric window, comprises a piezoelectric material having a vibrating active surface that mechanically cooperates with the wall to be de-iced, and means for the polarization of this piezoelectric material, comprising an AC voltage source and conducting or semiconducting electrodes placed in contact with this material according to a geometry capable of generating, within this material, an acoustic wave that has a direction of vibration which is oriented longitudinally and/or transversally to said surface to be de-iced, the amplitude of this vibration being sufficient to respectively detach and/or break the deposit of ice formed on said surface. The piezoelectric material is preferably a ferroelectric polymer such as a polymer of the group comprising PVF2, PVF2 -TrFE, PVDCN-VAc, PVF2 -TFE and the mixture of these polymers with one another and/or with PMMA or PEMA. The electrodes are preferably formed into a thin layer deposited on the surface of the piezoelectric material, and their material is then advantageously a material of the group comprising resistive indium-tin oxide, the polymers that are conductive in a matrix, hydrogenated amorphous silicon and polyimides charged with organic salts.
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Citations
10 Claims
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1. A device to eliminate ice formed on the surface of a wall of an optical or radio-electric window, comprising:
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a self-supporting piezoelectric material forming at least a portion of said wall chosen from among the ferroelectric polymers of the group comprising PVF2, PVF2 -TrFE, PVDCN-VAc, PVF2 -TFE and the mixture of these polymers with one another and/or with PMMA or PEMA, said piezoelectric material having a vibrating active surface that mechanically vibrates to eliminate ice on said wall, and means for polarizing said piezoelectric material, comprising an AC voltage source and electrodes made of a material of the group comprising resistive indium-tin oxide, polymers that are conductive in a matrix, hydrogenated amorphous silicon and polyimides charged with organic salts, the electrodes being in contact with said piezoelectric material according to a geometry for generating an acoustic wave having a direction of vibration which is oriented longitudinally and/or transversally to said surface to be de-iced, the amplitude of said vibration being sufficient to respectively detach and/or break the deposit of ice formed on said surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification