Method for dissipating heat away from a heat sensitive device using bicarbonate compositions

• US 5,932,839 A
• Filed: 11/04/1997
• Issued: 08/03/1999
• Est. Priority Date: 11/04/1997
• Status: Expired due to Term

• Current Assignee: Alliedsignal Inc.
• Original Assignee: Alliedsignal Inc.
• Inventors: Olzak, Richard A., Ren, Jane, Osuch, Christopher E., Plyley, Amanda L.
• Primary Examiner(s): REICHARD, DEAN ALAN
• Application Number:
  US08/963,879
• Time in Patent Office: 637 Days
• Field of Search: 174/17 VA, 174/50, 174/17 SF, 361/708, 361/709, 361/717
• US Class Current: 174/17.0SF
• CPC Class Codes: C08K 3/26 Carbonates; Bicarbonates
• CPC Class Codes: C09K 5/16 Materials undergoing chemical reactions when used
• CPC Class Codes: H05K 5/021 specially adapted for data recorders, e.g. for flight recorders
• CPC Class Codes: H05K 5/0213 Venting apertures; Constructional details thereof

Abstract

The present invention provides methods and compositions useful for heat absorption and dissipation, which include between about 10 percent and about 99 percent by weight of a bicarbonate compound and between about 90 percent and about 1 percent by weight of binder, and thermally protected enclosures including the same.

Claims

1. An enclosure for thermally protecting one or more heat sensitive devices from a high temperature environment, said enclosure comprising:

an outer housing having interior surfaces defining an interior cavity, said interior cavity for containing said one or more heat sensitive devices; and

a composition comprising;

a) between about 10 percent and about 99 percent by weight of a bicarbonate compound; and

b) between about 90 percent and about 1 percent by weight of a binder;

wherein said composition occupies at least a portion of said interior cavity and substantially encloses said one or more heat sensitive devices;

wherein said bicarbonate compound exhibits endothermic decomposition when said enclosure is subjected to said high temperature environment, and wherein said composition absorbs heat from said high temperature environment during said endothermic decomposition of said bicarbonate compound.

2. The enclosure according to claim 1, wherein said composition comprises about 95 percent by weight of said bicarbonate compound and about 5 percent by weight of said binder.

3. The enclosure according to claim 1, wherein said composition is in the form of blocks which occupy at least a portion of said interior cavity.

4. The enclosure according to claim 1, further comprising a thermal insulating liner between said composition and said interior surfaces of said interior cavity.

5. The enclosure according to claim 1, further comprising a means for venting carbon dioxide from the enclosure.

6. An enclosure for thermally protecting one or more heat sensitive devices from a high temperature environment, said enclosure comprising:

an outer housing having interior surfaces defining an interior cavity, said interior cavity for containing said one or more heat sensitive devices;

a composition comprising;

a) between about 10 percent and about 99 percent by weight of a bicarbonate compound; and

b) between about 90 percent and about 1 percent by weight of a binder; and

a thermal insulating liner between said composition and said interior surfaces of said interior cavity,

wherein said composition occupies at least a portion of said interior cavity and substantially surrounds said one or more heat sensitive devices;

wherein said bicarbonate compound exhibits endothermic decomposition when said enclosure is subjected to said high temperature environment; and

wherein said composition absorbs heat from said high temperature environment during said endothermic decomposition of said bicarbonate compound.

7. The enclosure according to claim 6, wherein said composition comprises about 95 percent by weight of said bicarbonate compound and about 5 percent by weight of said binder.

8. The enclosure according to claim 6, wherein said composition is in the form of blocks which occupy at least a portion of said interior cavity.

9. The enclosure according to claim 6, further comprising a means for venting carbon dioxide from the enclosure.

10. A thermally protected recording device, said device comprising:

an outer housing having interior surfaces defining an interior cavity;

one or more solid state electronic memory devices contained within said interior cavity for storing data which is to be recovered from each of said solid state electronic memory devices following exposure of said outer housing to a high temperature environment; and

a composition comprising;

a) between about 10 percent and about 99 percent by weight of a bicarbonate compound; and

b) between about 90 percent and about 1 percent by weight of a binder;

wherein said composition occupies at least a portion of said interior cavity and substantially encloses said one or more memory devices, wherein said bicarbonate compound exhibits endothermic decomposition when said enclosure is subjected to said high temperature environment, and wherein said composition absorbs heat from said high temperature environment during said endothermic decomposition of said bicarbonate compound.

11. The enclosure according to claim 10, wherein said composition comprises about 95 percent by weight of said bicarbonate compound and about 5 percent by weight of said binder.

12. The enclosure according to claim 10, wherein said composition is in the form of blocks which occupy at least a portion of said interior cavity.

13. The enclosure according to claim 10, further comprising a thermal insulating liner between said composition and said interior surfaces of said interior cavity.

14. The enclosure according to claim 10, further comprising a means for venting carbon dioxide from the outer housing.