Vacuum insulation structures with multiple insulators
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.
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.