Thermally insulated air cargo container
A thermally insulated panel includes a first skin, a second skin spaced apart from the first skin, and a core that is disposed between and bonded to the first skin and the second skin such that the core transfers loads between the first skin and the second skin. The core includes a porous filler material that has a vacuum drawn therein such that the core resists transfer of thermal energy through the panel. A cargo container including thermally insulated panels and a method of manufacturing the thermally insulated panels are also disclosed. In addition, a method of repairing a vacuum insulated panel is disclosed.
1. A thermally insulated panel, the panel comprising:
a first skin;
a second skin spaced apart from the first skin; and
a core including an open-cell foam core, the foam core disposed between and bonded to the first skin and the second skin such that the foam core transfers shear loads of at least 20 pounds per square inch between the first skin and the second skin, the core including a porous filler material, the porous filler material having a vacuum drawn therein such that the core resists transfer of thermal energy through the panel.
2. The panel according to claim 1 , further comprising:
a first barrier between the first skin and the core; and
a second barrier between the second skin and the core, the first and second barriers sealing the core such that a core vacuum is maintained within the core.
3. The panel according to claim 2 , wherein core includes a foam core bonded to the first skin and the second skin, the foam core encapsulating the porous filler material therein, the first and second barriers sealing the foam core such that a core vacuum is maintained within the foam core, the foam core transferring the shear loads of at least 20 pounds per square inch between the first skin and the second skin.
4. The panel according to claim 3 , further comprising a third barrier disposed about the porous filler material such that the porous filler material is encapsulated within the third barrier, the third barrier disposed within the foam core, the porous filler material having a filler vacuum therein, the filler vacuum greater than the core vacuum.
5. The panel according to claim 3 , further comprising a vacuum port secured to the first skin or the second skin, the vacuum port in fluid communication with the foam core and configured to allow the core vacuum to be drawn within the foam core after the panel is constructed.
6. The panel according to claim 5 , further comprising a vacuum indicator configured to provide indicia of a desired vacuum within the panel.
7. The panel according to claim 6 , wherein the vacuum indicator is disposed within the porous filler material to provide indicia of a desired vacuum within the porous filler material or is disposed in the vacuum port to provide an indicia of a desired vacuum within the foam core.
8. The panel according to claim 6 , wherein the vacuum indicator is mechanical or electrical.
9. The panel according to claim 6 , wherein the vacuum indicator is configured to provide wireless, wired, or mechanical monitoring of a vacuum within the porous filler material or the foam core.
10. The panel according to claim 1 , further comprising a barrier encapsulating the porous filler material such that the porous filler material has a filler vacuum therein.
11. The panel according to claim 10 , wherein core includes a foam core bonded to the first skin and the second skin, the foam core encapsulating the porous filler material therein.
12. The panel according to claim 11 , further comprising a first core barrier and a second core barrier sealing the foam core such that a core vacuum is maintained within the foam core.
13. The panel according to claim 1 , wherein the first skin and the second skin are joined at edge portions of the panel, the first and second skins forming a seal with one another in the edge portions to seal the core.
14. The panel according to claim 1 , further comprising a rigid frame disposed about edge portions of the core and disposed between the first skin and the second skin.
15. A thermally insulated panel, the panel comprising:
a first skin;
a second skin spaced apart from the first skin;
a core disposed between and bonded to the first skin and the second skin such that the core transfers loads between the first skin and the second skin, the core including a porous filler material, the porous filler material having a vacuum drawn therein such that the core resists transfer of thermal energy through the panel; and
a rigid frame disposed about edge portions of the core and disposed between the first skin and the second skin, the rigid frame including a frame pocket defined therein, the frame pocket having a frame vacuum defined therein, the frame pocket including a microporous frame filler material.
16. The panel according to claim 15 , wherein the frame pocket is in fluid communication with the core such that a vacuum within the core is equalized with the frame pocket.
17. The panel according to claim 14 , wherein the rigid frame defines a C-profile with the core received within the C-profile of the rigid frame.
18. The panel according to claim 1 , wherein the core includes an internal porous structure, the internal porous structure including at least one of a plurality of randomly oriented tubes, a plurality of stacked tubes parallel to the first skin and the second skin, a repeating honeycomb structure extending perpendicular to the first skin and the second skin, a porous foam, or combinations thereof, the porous filler material disposed within the internal porous structure.
19. A thermally insulated container, the container comprising:
a first thermally insulated panel according to claim 1 , the first panel having a first edge portion; and
a second thermally insulated panel according to claim 1 , the second panel having a second edge portion, the first and second edge portions securing the first panel relative to the second panel such that the first and second panels define a cargo space therebetween.
20. A method of manufacturing a thermally insulated panel, the method comprising:
forming a core with a porous filler material therein;
applying a first skin over the core such that the first skin is bonded to an open cell foam core of the core;
applying a second skin over the core such that the second skin is bonded to the foam core of the core, the foam core capable of transferring at least 20 pounds per square inch of shear load between the first skin and the second skin; and
sealing edge portions of the core such that the core is sealed within first and second skins, the porous filler material having a vacuum defined therein.