Insulated container system for maintaining a controlled payload temperature
View Patent ↗An insulated container system and a temperature control insert that is configured to maintain a payload chamber temperature over a minimum length of time to enable goods within the payload chamber to be shipped over distances while being maintained within a desired temperature range.
1. An insulated container system for maintaining a controlled payload temperature over a period of time, the insulated container system comprising:
an external carton comprising a sidewall structure extending from a bottom carton wall to a top carton wall and defining an enclosure bounded by the sidewall structure, the bottom carton wall and the top carton wall;
a sidewall insulative layer disposed within the enclosure and along the sidewall structure;
a bottom insulative layer disposed within the enclosure and along the bottom carton wall;
a payload chamber bounded by the sidewall insulative layer and bottom insulative layer;
a top insulative layer operatively disposed over the payload chamber; and
a temperature control insert disposed between the top insulative layer and the payload chamber, wherein the temperature control insert comprises a tray and at least a first phase change material that is sealed within the tray, the tray having a working surface facing the payload chamber, the working surface having a first portion defining a top surface of the payload chamber and at least a second portion that extends from the top surface and into the payload chamber.
2. The insulated container system recited in claim 1 , wherein the external carton comprises a corrugated cardboard box.
3. The insulated container system recited in claim 1 , wherein the external carton is a regular slotted container (RSC).
4. The insulated container system recited in claim 1 , wherein the sidewall structure comprises four sidewall elements.
5. The insulated container system recited in claim 1 , wherein the sidewall insulative layer comprises a high performance insulation panel having a thermal resistance of at least about 1.5 m 2 ·K/W.
6. The insulated container system recited in claim 1 , wherein the bottom insulative layer comprises a high performance insulation panel having a thermal resistance of at least about 2 m 2 ·K/W.
7. The insulated container system recited in claim 1 , wherein at least one of the sidewall insulative layer and the bottom insulative layer comprises a vacuum insulation panel.
8. The insulated container system recited in claim 1 , wherein the top insulative layer comprises a vacuum insulation panel.
9. The insulated container system recited in claim 1 , wherein the working surface comprises a rigid or semi-rigid thermoformed structure.
10. The insulated container system recited in claim 9 , wherein the working surface is fabricated from a plastic sheet.
11. The insulated container system recited in claim 10 , wherein the working surface is fabricated from polyethylene terephthalate (PET).
12. The insulated container system recited in claim 1 , wherein the second portion comprises a plurality of projections extending into the payload chamber.
13. The insulated container system recited in claim 12 , wherein the projections extend into the payload chamber by a depth of at least about 10 mm.
14. The insulated container system recited in claim 1 , wherein the working surface has a surface area factor of at least about 1.05.
15. The insulated container system recited in claim 1 , wherein the first phase change material comprises an aqueous-based gel.
16. The insulated container system recited in claim 1 , wherein the first phase-change material has a transition temperature of not greater than about 0° C.
17. The insulated container system recited in claim 1 , wherein the first phase-change material has a transition temperature of not greater than about −20° C.
18. The insulated container system recited in claim 1 , wherein the first phase change material has a transition temperature of at least about 5° C.
19. The insulated container system recited in claim 1 , wherein the phase change material has a transition temperature of at least about 15° C.
20. The insulated container system recited in claim 1 , wherein the phase change material has a transition temperature of at least about 25° C.
21. The insulated container system recited in claim 1 , further comprising at least a second phase change material that is sealed within the tray.
22. The insulated container system recited in claim 1 , wherein the temperature control insert comprises an outer peripheral edge that is disposed between an upper edge of the sidewall insulative layer and the top insulative layer to secure the temperature control insert therebetween.
23. The insulated container system recited in claim 22 , further comprising a first cushioning layer disposed between the upper edge of the sidewall insulative layer and the outer peripheral edge of the temperature control insert.
24. The insulated container system recited in claim 23 , further comprising a second cushioning layer disposed between the outer peripheral edge of the temperature control insert and the top insulative layer.
25. The insulated container system recited in claim 24 , wherein the first and second cushioning layers comprise a polymer foam.
26. A temperature control insert configured for placement in an insulated container, comprising:
a volume of first phase change material disposed within the insert; and
a volume of second phase change material disposed within the insert that is discrete from the volume of first phase change material, wherein at least one of the composition or the phase state of the second phase change material is different than the first phase change material.
27. The temperature control insert of claim 26 , wherein the first phase change material is a liquid at a starting temperature and the second phase change material is a solid at the starting temperature.
28. The temperature control insert of claim 27 , wherein the first phase change material is a super-cooled liquid at the starting temperature.
29. The temperature control insert of claim 28 , wherein the first and the second phase change materials are the same or substantially the same composition.
30. The insulated container system recited in claim 1 , wherein the temperature control insert comprises an outer edge disposed between an upper surface of the sidewall insulative layer and the top insulative layer.
31. The insulated container system recited in claim 12 , wherein the plurality of projections contain a second phase change material, and at least one of the composition or the phase state of the second phase change material is different than the composition or phase state of the first phase change material.
32. The temperature control insert of claim 26 , wherein the volume of the first phase change material surrounds the volume of the second phase change material.
33. The temperature control insert of claim 26 , wherein the first and second phase change materials are physically segregated within the insert.
34. The temperature control insert of claim 26 , wherein the volume of first phase change material is located in an upper cavity of the temperature control insert and the volume of second phase change material is located in a lower cavity of the temperature control insert.
35. The temperature control insert of claim 26 , comprising a tray, wherein the volume of first phase change material and the volume of second phase change material are sealed within the tray, the tray having a working surface facing the payload chamber, the working surface having a first portion defining a top surface of the payload chamber and at least a second portion that extends from the top surface and into the payload chamber.
36. The temperature control insert of claim 26 , wherein the volume of first phase change material is located in a first plurality of projections extending from the temperature control insert and the volume of second phase change material is located in a second plurality of projections extending from the temperature control insert.