System and method for cooling electrical components using an electroactive polymer actuator

• US 10,119,532 B2
• Filed: 02/16/2015
• Issued: 11/06/2018
• Est. Priority Date: 02/16/2015
• Status: Active Grant

• Current Assignee: Hamilton Sundstrand Corporation (Rtx Corporation)
• Original Assignee: Hamilton Sundstrand Corporation (Rtx Corporation)
• Inventors: Cordatos, Haralambos, St. Rock, Brian
• Primary Examiner(s): Lettman, Bryan
• Assistant Examiner(s): Solak, Timothy P
• Application Number:
  US14/623,319
• Publication Number:
  US 20160237999A1
• Time in Patent Office: 1,359 Days
• CPC Class Codes: F04B 19/006 Micropumps F04B43/043 and F04B43/095 take precedence
• CPC Class Codes: F04B 35/04 the means being electric
• CPC Class Codes: F04B 43/0054 particularities of the flexible members
• CPC Class Codes: F04B 45/027 having electric drive
• CPC Class Codes: F04B 45/047 Pumps having electric drive
• CPC Class Codes: F04B 53/08 Cooling; Heating; Preventing freezing

Abstract

A spot-cooling system including an electroactive polymer actuator, an enclosure defining an internal cavity, and a port in the enclosure is described herein. The electroactive polymer actuator may be configured to draw air into the enclosure. The electroactive polymer actuator may be configured to force air from the enclosure. The electroactive polymer actuator may comprise a corrugated electroactive polymer actuator. The electroactive polymer actuator may comprise a plurality of layered electroactive polymer actuators.

Claims

1. A spot-cooling system for an aircraft electrical component comprising:

a corrugated electroactive polymer actuator diaphragm;

a flexible enclosure defining an internal cavity;

a first inlet comprising a first check valve and a second inlet opposite the first inlet comprising a second check valve;

an outlet comprising a third check valve between the first inlet and the second inlet;

wherein a surface opposite the outlet of the flexible enclosure is the corrugated electroactive polymer actuator diaphragm,

wherein the corrugated electroactive polymer actuator diaphragm is configured to extend thereby expanding the surface of the enclosure to draw air into the internal cavity through the inlet of the enclosure,

wherein the corrugated electroactive polymer actuator diaphragm is configured to contract thereby collapsing the surface of the enclosure to force air out of the internal cavity through the outlet of the enclosure, and

wherein the outlet is adjacent to the aircraft electrical component and the first inlet and second inlet are adjacent to an air source that is cooler relative to an air source near the aircraft electrical component.

2. The spot-cooling system of claim 1, wherein the corrugated electroactive polymer actuator diaphragm is configured to expand and contract along a first direction and the flexible enclosure is configured expand and contract along the first direction.

3. The spot-cooling system of claim 1, wherein the corrugated electroactive polymer actuator diaphragm comprises a thin polymer film where a first electrode, in the form of a first electrically conductive layer, is arranged on a first surface of the polymer film, and a second electrode, in the form of a second electrically conductive layer, is arranged on a second, opposite, surface of the polymer film.

4. The spot-cooling system of claim 3, wherein in response to a potential difference between the first electrode and the second electrode, the first electrode and second electrode are attracted to each other, thereby compressing the polymer film.

5. The spot cooling system of claim 1, wherein the first, second, and third check valves are configured to restrict leakage airflow.

6. The spot cooling system of claim 1, wherein the cooler air source is external to a housing of the internal cavity.

7. The spot cooling system of claim 1, wherein the third check valve is configured to close and the first check valve and second check valve are configured to open as air is drawn into the internal cavity.

8. The spot cooling system of claim 1, wherein the third check valve is configured to open and the first check valve and second check valve are configured to close as air is forced from the internal cavity.