Portable insulated container with refrigeration

• US 6,751,963 B2
• Filed: 09/24/2002
• Issued: 06/22/2004
• Est. Priority Date: 09/24/2002
• Status: Expired due to Term

• Current Assignee: Lifoam Industries, LLC (Newell Brands Inc.)
• Original Assignee: Coleman Company Incorporated (Newell Brands Inc.)
• Inventors: Boenig, James Michael, Navedo, Jose Enrique
• Primary Examiner(s): Esquivel, Denise L.
• Assistant Examiner(s): Drake, Malik N.
• Application Number:
  US10/254,437
• Publication Number:
  US 20040055313A1
• Time in Patent Office: 637 Days
• Field of Search: 62/6, 622/351, 624/571, 624/579
• US Class Current: 62/6
• CPC Class Codes: F25B 2309/1412 Pulse-tube cycles characterised by heat exchanger details
• CPC Class Codes: F25B 25/005 using primary and secondary systems
• CPC Class Codes: F25B 27/005 in compression type systems
• CPC Class Codes: F25B 9/14 characterised by the cycle used, e.g. Stirling cycle
• CPC Class Codes: F25D 11/003 Transport containers
• CPC Class Codes: F25D 17/065 with compartments at different temperatures
• CPC Class Codes: F25D 19/006 Thermal coupling structure or interface
• CPC Class Codes: F25D 23/061 with conduit means
• CPC Class Codes: F25D 2400/12 Portable refrigerators

Abstract

An insulated container utilizing Stirling cooler technology. The insulated container and the Stirling cooler include a portable power source, such as a battery, a fuel cell, or a solar panel. The Stirling cooler may provide cooling to the inside of the insulated container, for example by a heat sink and a fan, direct connection to a liner in the insulated container, or a thermosyphon or heat pipe connected to the heat acceptor for the Stirling cooler and routed through the insulated container. Controls may be provided that regulate the cycling of the Stirling cooler so that the internal temperature of the insulated container may be controlled. An embodiment includes both a freezer portion and a refrigeration portion.

Claims

1. An insulated container, comprising:

a first compartment;

a second compartment;

a Stirling cooler having a heat rejecter and a heat acceptor;

a thermal transfer device configured and arranged to draw heat via the heat acceptor from the first and second compartments; and

a power source connected to the Stirling cooler for providing power thereto, the power source being fully contained with the insulated container.

2. The insulated container of claim 1, wherein the power source comprises a battery.

3. The insulated container of claim 2, further comprising a solar panel connected to the battery and configured to recharge the battery.

4. The insulated container of claim 3, wherein the solar panel comprises solar modules connected to an outside surface of the insulated container.

5. The insulated container of claim 4, wherein the solar modules are integrated into a lid for the insulated container.

6. The insulated container of claim 1, wherein the power source comprises a fuel cell.

7. The insulated container of claim 1, wherein the power source comprises a solar panel.

8. The insulated container of claim 7, wherein the solar panel comprises solar modules connected to an outside surface of the insulated container.

9. The insulated container of claim 8, wherein the solar modules are integrated into a lid for the insulated container.

10. The insulated container of claim 1, wherein the heat acceptor is mounted on the interior of the first compartment.

11. The insulated container of claim 1, wherein the thermal transfer device comprises a heat sink mounted on the heat acceptor, and a fan positioned to draw air through the heat sink and into the first compartment.

12. The insulated container of claim 1, wherein the heat rejecter is mounted on the outside of the insulated container.

13. The insulated container of claim 12, wherein the heat rejecter is mounted in a third compartment, and further comprising an opening in the third compartment arranged to allow the escape of heat.

14. The insulated container of claim 13, further comprising a fan positioned to remove heat from the heat rejecter and direct the heat out of the opening.

15. The insulated container of claim 1, wherein the thermal transfer device comprises at least one of a heat pipe or a thermosyphon.

16. The insulated container of claim 15, wherein the at least one of a heat pipe or a thermosyphon is connected to the heat accepter, routed into the first compartment, and extends in a serpentine path along an interior wall of the first compartment.

17. The insulated container of claim 1, wherein the first compartment is cooled by the heat acceptor and the thermal transfer device a sufficient amount to function as a freezer, and wherein the second compartment is cooled by the heat acceptor and the thermal transfer device a sufficient amount to function as a refrigerator.

18. The insulated container of claim 17, wherein the first compartment is cooled by the heat acceptor and the thermal transfer device, and wherein the second compartment is cooled by the first compartment.

19. The insulated container of claim 18, wherein the second compartment is cooled by air flowing through an opening between the first compartment and the second compartment.

20. The insulated container of claim 19, further comprising a device for selectively closing a part of the opening.

21. The insulated container of claim 20, wherein the device comprises louvers.

22. The insulated container of claim 21, wherein the louvers are driven by a motor.

23. The insulated container of claim 18, further comprising a divider between the first compartment and the second compartment, and wherein the second compartment is cooled by convection through the divider.

24. The insulated container of claim 1, further comprising a handle connected to the insulated container and for transporting the insulated container.

25. The insulated container of claim 1, further comprising a third compartment heated by the heat rejecter.

26. An insulated container, comprising:

a first compartment;

a second compartment;

a Stirling cooler having a heat rejecter and a heat acceptor; and

a thermal transfer device attached to the heat acceptor configured and arranged to draw heat from the first compartment and the second compartment via the heat acceptor, the thermal transfer device being arranged at an end of the first compartment away from the second compartment.

27. The insulated container of claim 26, wherein the thermal transfer device comprises at least one of a heat pipe or a thermosyphon.

28. The insulated container of claim 27, wherein the at least one of a heat pipe or a thermosyphon is connected to the heat accepter, routed into the first compartment, and extends in a serpentine path along an interior of the end of the first compartment.

29. The insulated container of claim 28, wherein the first compartment is cooled by the heat acceptor and the thermal transfer device a sufficient amount to function as a freezer, and wherein the second compartment is cooled by the first compartment a sufficient amount to function as a refrigerator.

30. The insulated container of claim 29, wherein the second compartment is cooled by air flowing through an opening between the first compartment and the second compartment.

31. The insulated container of claim 30, further comprising a device for selectively closing a part of the opening.

32. The insulated container of claim 31, wherein the device comprises louvers.

33. The insulated container of claim 32, wherein the louvers are driven by a motor.

34. The insulated container of claim 29, further comprising a divider between the first compartment and the second compartment, and wherein the second compartment is cooled by convection through the divider.

35. The insulated container of claim 26, further comprising a handle connected to the insulated container and for transporting the insulated container.

36. The insulated container of claim 26, further comprising a third compartment heated by the heat rejecter.

37. An insulated container, comprising:

a Stirling cooler having a heat rejecter and a heat acceptor;

a thermal transfer device configured and arranged to draw heat from the first compartment via the heat acceptor;

a first compartment cooled by the heat acceptor and the thermal transfer device a sufficient amount to function as a freezer; and

a second compartment cooled by the heat acceptor and the thermal transfer device a sufficient amount to function as a refrigerator.

38. The insulated container of claim 37, wherein the thermal transfer device comprises at least one of a heat pipe or a thermosyphon.

39. The insulated container of claim 38, wherein the at least one of a heat pipe or a thermosyphon is connected to the heat accepter, routed into the first compartment, and extends in a serpentine path along an interior wall of the first compartment.

40. The insulated container of claim 37, and wherein the second compartment is cooled by the first compartment.

41. The insulated container of claim 37, wherein the second compartment is cooled by air flowing through an opening between the first compartment and the second compartment.

42. The insulated container of claim 41, further comprising a device for selectively closing a part of the opening.

43. The insulated container of claim 42, wherein the device comprises louvers.

44. The insulated container of claim 43, wherein the louvers are driven by a motor.

45. The insulated container of claim 37, further comprising a divider between the first compartment and the second compartment, and wherein the second compartment is cooled by convection through the divider.

46. The insulated container of claim 37, further comprising a second compartment heated by the heat rejecter.

47. An insulated container, comprising:

a refrigeration unit for cooling at least one compartment in the insulated container, the refrigeration unit comprising a Stirling cooler having a heat rejecter and a heat acceptor, and a thermal transfer device configured and arranged to draw heat from the first compartment via the heat acceptor;

a lid; and

a solar panel mounted integrally on the lid and forming a portion of an outer surface the lid and configured to supply power for the refrigeration unit.

48. An insulated container, comprising:

a refrigeration unit for cooling at least one compartment in the insulated container;

a lid; and

a solar panel mounted integrally on the lid and forming a portion of an outer surface the lid and configured to supply power for the refrigeration unit, the solar panel comprising solar modules mounted on the lid so as to form the portion of the outer surface of the lid.

49. An insulated container, comprising:

a refrigeration unit for cooling at least one compartment in the insulated container;

a battery for powering the refrigeration unit;

a lid; and

a solar panel mounted integrally on the lid and forming a portion of an outer surface the lid and configured to supply power for the refrigeration unit, the solar panel being configured to recharge the battery.

50. The insulated container of claim 49, wherein the solar panel comprises solar modules mounted on the lid so as to form the portion of the outer surface of the lid.

51. A method for forming an insulated container, comprising:

aligning at least one of a thermosyphon and a heat pipe inside a shell;

aligning a metallic liner along the least one of a thermosyphon and a heat pipe and opposite the shell;

injecting foam between the metallic liner and the shell; and

allowing the foam to harden so as to capture the at least one of a thermosyphon and a heat pipe against the metallic liner.

52. The method of claim 51, further comprising attaching the at least one of a thermosyphon and a heat pipe against the metallic liner to a Stirling cooler.