Container for storing and serving frozen confectionery items
A thermally insulated container for storing and serving frozen confectionery items, wherein the container is preferably arranged to be removably mounted within a service cart, such as an inflight service cart.
1. Thermally insulated container ( 12 ) for storing and serving frozen confectionery items, the container comprising:
a thermally insulated outer housing ( 1 ) defining an insulated chamber ( 2 ), the thermally insulated outer housing ( 1 ) having at least one openable side ( 26 ) to allow access to the chamber ( 2 ),
a thermally conductive inner frame ( 4 ) mounted within the insulated chamber ( 2 ), the inner frame ( 4 ) having at least an upper wall ( 6 ) and a lower wall ( 7 ) which are connected by two side walls ( 8 a , 8 b ), thereby delineating a four-sided thermally conductive perimeter within the outer housing,
at least a first reservoir of phase change material ( 5 ), positioned in thermal contact with the inner frame ( 4 ),
wherein the inner frame ( 4 ) is mounted within the insulated chamber ( 2 ) such that there is a gap ( 13 ) between the thermally insulated outer housing ( 1 ) and the thermally conductive inner frame ( 4 ), the gap ( 13 ) having a width of 2 to 8 mm.
2. Thermally insulated container ( 12 ) as claimed in claim 1 and additionally comprising a second reservoir of phase change material ( 16 ), wherein the second reservoir of phase change material ( 16 ) is positioned in thermal contact with the inner frame ( 4 ).
3. Thermally insulated container ( 12 ) as claimed in claim 2 wherein the first reservoir of phase change material ( 5 ) is positioned in thermal contact with the upper wall ( 6 ) of the inner frame ( 4 ) and the second reservoir of phase change material ( 16 ) is positioned in thermal contact with the lower wall ( 7 ) of the inner frame ( 4 ).
4. Thermally insulated container ( 12 ) as claimed in claim 1 wherein the gap ( 13 ) has a width of 3 to 5 mm.
5. Thermally insulated container ( 12 ) as claimed in claim 1 wherein the inner frame ( 4 ) additionally comprises a thermally conductive back plate.
6. Thermally insulated container ( 12 ) as claimed in claim 1 wherein the thermally conductive inner frame ( 4 ) is removably mounted within the insulated chamber ( 2 ).
7. Thermally insulated container ( 12 ) as claimed in claim 1 wherein the container additionally comprises dry ice ( 17 ) positioned in contact with the reservoir of phase change material ( 5 , 16 ).
8. Thermally insulated container ( 12 ) as claimed in claim 1 wherein the container additionally comprises at least one product drawer ( 15 ) for holding a plurality of frozen confectionery items, the product drawer ( 15 ) being engageable within the inner frame ( 4 ) such that the drawer ( 15 ) can be moved relative to the inner frame ( 4 ) in a slidable manner between an open position and a closed position.
9. Thermally insulated container ( 12 ) as claimed in claim 8 wherein the product drawer ( 15 ) is a plastic drawer.
10. Thermally insulated container ( 12 ) as claimed in claim 8 wherein the product drawer ( 15 ) is a metal drawer.
11. Thermally insulated container ( 12 ) as claimed in claim 1 wherein the thermally conductive inner frame ( 4 ) is made from aluminium or an aluminium alloy.
12. Thermally insulated container ( 12 ) as claimed in claim 1 wherein the thermally insulated outer housing ( 1 ) comprises a material selected from: expanded polypropylene (EPP), polyurethane (PU), Aerogel, and vacuum panels.
13. A service cart ( 25 ) comprising at least one insulated container ( 12 ) as claimed in claim 1 .
14. The thermally insulated container according to claim 1 wherein the inner frame ( 4 ) hangs within the thermally insulated chamber ( 2 ).
15. The thermally insulated container according to claim 14 wherein the thermally conductive inner frame is attached to the surface of the phase change reservoir so that it hangs from the reservoir.
16. The thermally insulated container according to claim 1 wherein the reservoir of phase change material ( 5 ) is held in position by ridges ( 20 a , 20 b ) on the sidewalls ( 8 a , 8 b ) of the inner frame ( 4 ).
17. The thermally insulated container according to claim 1 wherein the reservoirs of phase change material ( 5 , 16 ) are in contact with sidewalls ( 8 a , 8 b ) of the inner frame ( 4 ) and the inner frame ( 4 ) is between moulded protrusions ( 18 ) which hold the frame in place so as to maintain the gap ( 13 ) between the frame and the outer housing ( 1 ).
18. The thermally insulated container according to claim 1 wherein the inner frame ( 4 ) is shaped so as to have arms ( 23 ) which interact with moulded grooves of the outer housing ( 1 ), thus enabling the inner frame to hang within the insulated chamber such that there is the gap ( 13 ) between the thermally insulated outer housing ( 1 ) and the thermally conductive inner frame ( 4 ), and the reservoir of phase change material ( 5 ) is positioned on top of the upper wall ( 6 ) of the inner frame ( 4 ).
19. A method for storing and serving frozen confectionery items using a thermally insulated container ( 12 ) as claimed in claim 1 , the method comprising:
cooling the reservoir(s) of phase change material ( 5 , 16 ) to a temperature of less than −6° C.;
mounting the thermally conductive inner frame ( 4 ) within the insulated chamber ( 2 ) of the thermally insulated outer housing ( 1 ) such that the cooled reservoir(s) of phase change material ( 5 , 16 ) are in thermal contact with the inner frame ( 4 ) and a plurality of frozen confectionery items are loaded within the inner frame ( 4 ); wherein the inner frame ( 4 ) is mounted within the insulated chamber ( 2 ) such that that there is a gap ( 13 ) between the thermally insulated outer housing ( 1 ) and the thermally conductive inner frame ( 4 ), the gap ( 13 ) having a width of 2 to 8 mm;
storing the frozen confectionery items within the insulated chamber ( 2 ) for a period of up to 24 hours and serving the frozen confectionery items during the storage period by opening an openable side ( 26 ) of the thermally insulated outer housing and removing at least one of the frozen confectionery items from the insulated chamber ( 2 ).
20. Method for storing and serving frozen confectionery items as claimed in claim 19 wherein:
the frozen confectionery items are loaded into the thermally conductive inner frame ( 4 ) by placing the frozen confectionery items into a product drawer ( 15 ) and engaging the product drawer ( 15 ) within the inner frame ( 4 ) such that the drawer ( 15 ) can be moved relative to the inner frame ( 4 ) in a slidable manner between an open position and a closed position; and
the frozen confectionery items are served by opening the openable side ( 26 ) of the thermally insulated outer housing, sliding the product drawer ( 15 ) to the open position and removing at least one of the frozen confectionery items, and then sliding the product drawer ( 15 ) to the closed position and closing the openable side ( 26 ) of the thermally insulated outer housing.