METHOD AND A SYSTEM FOR TREATING ICE FOR AN AIRCRAFT WINDSHIELD

• US 20160068272A1
• Filed: 02/24/2015
• Published: 03/10/2016
• Est. Priority Date: 02/26/2014
• Status: Active Grant

• Current Assignee: Airbus Helicopters
• Original Assignee: Airbus Helicopters
• Inventors: LESCHI, Robert, CATRIS, Stephane, BALMAIN, Gregory
• Granted Patent: US 9,868,535 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B64C 1/1476 Canopies; Windscreens or similar transparent elements
• CPC Class Codes: B64D 15/00 De-icing or preventing icing on exterior surfaces of aircraft motor vehicles specially adapted for carrying de-icing equipment B60P
• CPC Class Codes: B64D 15/14 controlled cyclically along length of surface
• CPC Class Codes: B64D 15/20 Means for detecting icing or initiating de-icing

Abstract

A method of treating ice for a windshield of an aircraft, in which method at least two distinct de-icing zones of the windshield are defined. During a de-icing step, at least one de-icing means is activated temporarily in order to de-ice the de-icing zones in succession and in a given cycle.

Claims

1. A method of treating ice for a canopy of an aircraft, the canopy including at least one windshield, the method comprising the following steps:

defining at least two distinct de-icing zones of the windshield; and

during a de-icing step, temporarily activating at least one de-icing means to de-ice the de-icing zones in succession in a given cycle of importance for the visibility made available to crew.

2. A method according to claim 1, wherein the de-icing step is performed when the aircraft is no longer flying in icing conditions, or at the request of a pilot.

3. A method according to claim 1, wherein the aircraft extends longitudinally from a front end to a rear end, and at least one de-icing zone referred to as a “

front”

de-icing zone is defined on at least one windshield for giving a pilot forward visibility towards the front of the aircraft.

4. A method according to claim 1, wherein the aircraft extends laterally from a left side to a right side and in elevation from a low portion to a high portion, and at least one de-icing zone referred to as a “

lateral”

zone is defined on at least one windshield giving a pilot lateral visibility towards one side of the aircraft, and/or at least one de-icing zone referred to as a “

low”

de-icing zone is defined giving a pilot downward visibility relative to the aircraft.

5. A method according to claim 1, wherein the aircraft has a windshield wiper capable of wiping a predetermined total angular sector, and the total angular sector is subdivided into a plurality of distinct small angular sectors each defining a de-icing zone.

6. An ice treatment device for a canopy of an aircraft, the canopy including at least one windshield, wherein the windshield has at least two distinct de-icing zones, and the ice treatment device includes at least one de-icing means and an ice detection system, the ice treatment device having a control unit communicating with the de-icing means to de-ice the at least two de-icing zones in succession in application of a given cycle of importance for the visibility made available to crew by applying the method according to claim 1.

7. An ice treatment device according to claim 6, wherein the ice treatment device includes at least two de-icing means for de-icing respective distinct de-icing zones, the control unit activating the two de-icing means one after another.

8. An ice treatment device according to claim 7, wherein the aircraft extends longitudinally from a front end to a rear end, and the at least two de-icing means comprise at least front de-icing means arranged at a de-icing zone referred to as a “

front”

zone of at least one windshield giving a pilot forward visibility towards the front of the aircraft, the control unit initially activating the front de-icing means in the event of ice being detected.

9. A device according to claim 6, wherein the aircraft extends laterally from a left side to a right side and in elevation from a low portion to a high portion, and the at least two de-icing means comprise at least one lateral de-icing means arranged at a de-icing zone referred to as a “

lateral”

zone of at least one windshield giving a pilot lateral visibility towards one side of the aircraft.

10. A device according to claim 6, wherein the aircraft extends laterally from a left side to a right side and in elevation from a low portion to a high portion, and the at least two de-icing means comprise at least one bottom de-icing means arranged at a de-icing zone referred to as a “

low”

zone of at least one windshield giving a pilot downward visibility relative to the aircraft.

11. A device according to claim 6, wherein the aircraft extends laterally from a left side to a right side and in elevation from a low portion to a high portion, and the at least two de-icing means comprise at least one lateral de-icing means arranged at a de-icing zone referred to as a “

lateral”

zone of at least one windshield giving a pilot lateral visibility towards one side of the aircraft and at least one bottom de-icing means arranged at a de-icing zone referred to as a “

low”

zone of at least one windshield giving a pilot downward visibility relative to the aircraft.

12. An ice treatment device according to claim 6, wherein the ice treatment device includes a windshield wiper carrying de-icing means, the windshield wiper being capable of wiping a predetermined total angular sector, the total angular sector including a plurality of distinct small angular sectors each defining a de-icing zone, the control unit activating the windshield wiper to wipe only one small angular sector at a time in order to de-ice the windshield in part.

13. An ice treatment device according to claim 10, wherein the total angular sector extends angularly upwards in an elevation direction of the windshield from a bottom first small angular sector to a top last small angular sector, the control unit causing the small angular sectors to be de-iced in succession in a predetermined cycle beginning with the bottom first small angular sector and ending with the top last angular small angular sector.

14. An ice treatment device according to claim 6, wherein the ice treatment device has at least two de-icing means respectively for de-icing two distinct de-icing zones, the control unit acting in the presence of ice to activate only one de-icing means at a time in order to unstick ice and causing a windshield wiper to wipe in order to remove the unstuck ice.

15. An ice treatment device according to claim 12, wherein the ice treatment device includes a treatment measurement system, the control unit causing the windshield wiper to wipe in order to remove the unstuck ice starting from a threshold treatment.

16. An ice treatment device according to claim 6, wherein the ice treatment device includes a selector member connected to the control unit and operable by an individual in order to define the given cycle.

17. An aircraft having at least one windshield, wherein the aircraft includes an ice treatment device according to claim 6.