Vacuum insulation structures with multiple insulators

Patent metadata

Field	Value
Publication number	US-10808987-B2
Application number	US-201615776276-A
Country	US
Kind code	B2
Filing date	Nov 29, 2016
Priority date	Dec 9, 2015
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

A refrigerator cabinet is provided. The refrigerator cabinet includes an inner liner and an external wrapper. The inner liner is positioned within the external wrapper such that a gap is defined between the external wrapper and inner liner. A first insulator is positioned within the gap, and a second insulator is positioned within the gap. A pressure within the gap is below about 1000 Pa.

First claim

What is claimed is:

1. A refrigerator cabinet comprising:
an inner liner;
an external wrapper, wherein the inner liner is positioned within the external wrapper;
a first insulator positioned proximate a front flange of the cabinet;
a second insulator positioned proximate the first insulator; and
a filter positioned between the first and second insulators.

2. The refrigerator of claim 1 , wherein the first insulator has a higher insulating property than the second insulator.

3. The refrigerator of any of claim 1 , wherein the inner liner comprises a polymeric material.

4. The refrigerator of claim 1 , wherein the inner liner comprises a metal.

5. The refrigerator of claim 1 , further comprising:
a trim breaker coupled to the inner liner and external wrapper.

6. The refrigerator of claim 5 , wherein the first insulator comprises fumed silica and the second insulator comprises precipitated silica.

7. A refrigerator cabinet comprising:
an inner liner;
an external wrapper, wherein the inner liner is positioned within the external wrapper such that a gap is defined between the external wrapper and internal liner;
a first insulator positioned within the gap;
a second insulator positioned within the gap, wherein a pressure within the gap is below about 1000 Pa; and
a filter positioned between the first and second insulators.

8. The cabinet of claim 7 , wherein the first and second insulators are substantially segregated.

9. The cabinet of claim 8 , wherein the first insulator is positioned proximate a front flange of the cabinet.

10. The cabinet of claim 7 , wherein the first insulator comprises fumed silica.

11. The cabinet of claim 10 , wherein the second insulator comprises precipitated silica.

12. The cabinet of claim 7 , wherein the filter comprises paper.

13. A refrigerator cabinet comprising:
an inner liner;
an external wrapper, wherein the inner liner is positioned within the external wrapper such that a gap is defined between the external wrapper and internal liner;
a first insulator positioned within the gap;
a second insulator positioned within the gap, wherein the first and second insulators are segregated; and
a filter positioned between the first and second insulators.

14. The refrigerator of claim 13 , wherein the inner liner comprises a polymeric material.

15. The refrigerator of claim 13 , wherein the inner liner comprises a metal.

16. The refrigerator of claim 13 , further comprising:
a trim breaker coupled to the inner liner and external wrapper.

17. The refrigerator of claim 16 , wherein the first insulator has a higher insulating property than the second insulator.

Assignees

• Whirlpool Co

Inventors

• Allard Paul B
• Naik Abhay

Classifications

• B29C45/14

  incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles {(B29C45/1671 takes precedence)} · CPC title

• B29C45/006

  Joining parts moulded in separate cavities · CPC title

• F25D2201/12

  using an insulating packing material · CPC title

• F25D2201/14

  using subatmospheric pressure · CPC title

• F25D23/062 Primary

  defining a cabinet · CPC title