Aircraft windshield defogging/deicing system and method of use thereof
First Claim
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1. An aircraft windshield defogging/deicing system comprising:
- a pair of transparent sheets maintained in spaced facing relation by a transparent interlayer;
a resistive coating positioned between the pair of transparent sheets; and
an inverter for applying a square wave or quasi-square wave AC signal to the resistive coating;
, wherein;
the inverter includes inverting circuitry for inverting an input DC signal into the AC signal, and a controller responsive to the input DC signal for outputting to the inverter one or more control signals which cause the inverter to invert the input DC signal into the AC signal;
the AC signal is an AC voltage;
the DC signal is a DC voltage;
the DC voltage has avalue ranging from 24-32 volts DC; and
the AC voltage has a value ranging from 115-230 volts AC RMS.
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Abstract
In an aircraft windshield defogging/deicing system, a pair of transparent sheets maintained in spaced facing relation by a transparent interlayer have a resistive coating positioned between the transparent sheets. An inverter is provided for applying to the resistive coating a square wave or quasi-square wave AC signal. In response to receiving this AC signal, the resistive coating generates heat, which reduces or avoids the accumulation of moisture or ice on the aircraft windshield.
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Citations
30 Claims
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1. An aircraft windshield defogging/deicing system comprising:
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a pair of transparent sheets maintained in spaced facing relation by a transparent interlayer; a resistive coating positioned between the pair of transparent sheets; and an inverter for applying a square wave or quasi-square wave AC signal to the resistive coating;
, wherein;the inverter includes inverting circuitry for inverting an input DC signal into the AC signal, and a controller responsive to the input DC signal for outputting to the inverter one or more control signals which cause the inverter to invert the input DC signal into the AC signal; the AC signal is an AC voltage; the DC signal is a DC voltage; the DC voltage has avalue ranging from 24-32 volts DC; and
the AC voltage has a value ranging from 115-230 volts AC RMS. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An aircraft windshield defogging/deicing system comprising:
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a glass deicing coating formed along a first transparent sheet comprising the aircraft windshield; inverter circuitry coupled to the glass deicing coating; and a controller for causing the inverter circuitry to invert DC power into AC power having a square wave or quasi-square wave waveform, wherein the DC power is a DC voltage ranging from 24-32 volts DC, and the AC power is an AC voltage ranging from 115-230 volts AC RMS and having a duty cycle ranging from 0%-100% and a frequency between 25-1000 Hertz. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification