Super insulating nano-spheres for appliance insulation and method for creating a super insulating nano-sphere material

Patent metadata

Field	Value
Publication number	US-11247432-B2
Application number	US-202016852672-A
Country	US
Kind code	B2
Filing date	Apr 20, 2020
Priority date	Dec 8, 2015
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

An insulating structure for an appliance includes an outer layer and an inner layer, wherein an insulating cavity is defined therebetween. A plurality of hollow nano-spheres are disposed within the insulating cavity, wherein each of the hollow nano-spheres includes a diameter in the range of from approximately 50 nanometers to approximately 1000 nanometers and has a wall that defines the internal space, and wherein the wall of each hollow nano-sphere has a thickness that is in a range of from approximately 0.5 nanometers to approximately 100 nanometers. A fill material is disposed in the insulating cavity and wherein the fill material is disposed in the space defined between the plurality of hollow nano-spheres, and wherein the fill material includes at least one of powdered silica, granulated silica, other silica material, aerogel and insulating gas.

First claim

What is claimed is:

1. An insulating material for an appliance insulating structure, the insulating material comprising:
a plurality of hollow nano-spheres, wherein each hollow nano-sphere of the plurality of hollow nano-spheres includes a diameter in a range of from approximately 50 nanometers to approximately 1000 nanometers and has a wall that defines an internal space, and wherein the wall of each hollow nano-sphere has a thickness that is in a range of from approximately 1 percent to approximately 10 percent of the diameter of the hollow nano-sphere, wherein the internal space of each hollow nano-sphere defines an internal pressure of apporximately 1 millibar; and
a fill material disposed within an interstitial space defined between the plurality of hollow nano-spheres, and wherein the fill material includes at least one of powdered silica, granulated silica, fumed silica, other silica material, nano aerogel powder, pearlite, rice husk ash, diatomaceous earth and insulating gas.

2. The insulating material of claim 1 , wherein the plurality of hollow nano-spheres are made from nano-particles of insulating material, wherein the nano-particles are made from at least one of soda-lime glass, borosilicate glass, fumed silica, precipitated silica, and powder aerogel.

3. The insulating material of claim 1 , wherein the plurality of hollow nano-spheres define a plurality of nano-sphere formations, wherein each of the nano-sphere formations includes strands of connected nano-spheres defining porous spaces between the strands of connected nano-spheres.

4. The insulating material of claim 1 , wherein the thickness of the wall is approximately 0.5 nanometers.

5. The insulating material of claim 1 , wherein the internal space includes an insulating gas that is contained within the hollow nano-sphere.

6. The insulating material of claim 5 , wherein the insulating gas includes carbon dioxide.

7. An insulating material for an appliance insulating structure, the insulating material comprising:
a plurality of hollow nano-spheres, wherein each hollow nano-sphere of the plurality of hollow nano-spheres includes a diameter that is less than approximately 1000 nanometers and has a wall that defines an internal space, and wherein the wall of each hollow nano-sphere has a thickness that is in a range of from approximately 0.5 nanometers to approximately 100 nanometers; and
a fill material mixed with the plurality of hollow nano-spheres, wherein the fill material is disposed in an interstitial space defined between the plurality of hollow nano-spheres, wherein the fill material includes an insulating gas and the insulating gas includes at least one of carbon dioxide, neon, krypton, and xenon.

8. The insulating material of claim 7 , wherein the internal space of each hollow nano-sphere defines an internal pressure of approximately 1 millibar.

9. The insulating material of claim 7 , wherein the plurality of hollow nano-spheres define a plurality of nano-sphere formations, wherein each of the nano-sphere formations includes strands of connected nano-spheres defining porous spaces between the strands of connected nano-spheres.

10. The insulating material of claim 7 , wherein the fill material includes at least one of powdered silica, granulated silica, fumed silica, other silica material, nano aerogel powder, pearlite, rice husk ash, diatomaceous earth and insulating gas.

11. The insulating material of claim 7 , wherein each hollow nano-sphere defines the internal space, wherein the internal space has an internal diameter in a range of from approximately 450 nanometers to approximately 900 nanometers.

12. The insulating material of claim 7 , wherein each hollow nano-sphere defines the internal space, wherein the internal space has an internal diameter in a range of from approximately 40 nanometers to approximately 900 nanometers.

13. The insulating material of claim 12 , wherein the diameter of a portion of the hollow nano-sphere of the plurality of hollow nano-spheres is approximately 50 nanometers.

14. An insulating material for an insulated appliance structure, the insulating material comprising:
a plurality of hollow nano-spheres, wherein each hollow nano-sphere of the plurality of hollow nano-spheres includes a diameter that is less than approximately 1000 nanometers and has a wall that defines an internal space, and wherein the wall of each hollow nano-sphere has a thickness that is in a range of from approximately 0.5 nanometers to approximately 100 nanometers, and wherein the internal space of each hollow nano-sphere defines an internal pressure of approximately 1 millibar, wherein the plurality of hollow nano-spheres define a plurality of nano-sphere formations, wherein each of the nano-sphere formations includes strands of connected nano-spheres defining porous spaces between the strands of connected nano-spheres; and
a fill material disposed in an interstitial space defined between the plurality of hollow nano-spheres.

15. The insulating material of claim 14 , wherein the fill material includes at least one of powdered silica, granulated silica, fumed silica, other silica material, aerogel and insulating gas.

16. The insulating material of claim 14 , wherein the internal space includes an insulating gas that is contained within the wall of the hollow nano-sphere.

17. The insulating material of claim 14 , wherein the plurality of hollow nano- spheres are made from nano-particles of insulating material, wherein the nano-particles are made from at least one of soda-lime glass, borosilicate glass, fumed silica, precipitated silica, and powder aerogel.

Assignees

• Whirlpool Co

Inventors

• Deka Lakshya J
• Grewal Rameet Singh
• Olivani Andrea

Classifications

• F25D23/062 Primary

  defining a cabinet · CPC title

• F25D2201/12

  using an insulating packing material · CPC title

• Y02B40/00

  Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers · CPC title

• B29L2031/7622

  Refrigerators · CPC title

• B32B2307/102

  Insulating · CPC title