Patent ID: 7467520

Claim:
Cooling unit ( 1 ) for a service trolley for use in an aircraft or train, the cooling unit comprising a drawer, and the drawer comprising: a partition ( 29 ), which partition separates a warm ( 30 ) and cold zone ( 31 ) in the drawer; one or more Peltier elements ( 42 ) with a side ( 43 ) that gives off heat and a side ( 44 ) that takes up heat; one or more first fans ( 32 ) provided in the cold zone ( 31 ) for feeding air to be cooled through the cold zone ( 31 ); one or more second fans ( 33 ) provided in the warm zone ( 30 ) for feeding air removing heat through the warm zone ( 30 ); characterised in that the drawer is a box essentially closed by walls ( 3 , 4 , 5 , 6 , 7 ), in that the partition comprises a layer ( 29 ) of heat-insulating material and in that the one or more Peltier elements ( 42 ) are located in the heat-insulating layer ( 29 ) with the side giving off heat facing the warm zone ( 30 ) and with the side taking up heat facing the cold zone ( 31 ), and wherein one or more heat-conducting first heat exchangers ( 35 ) joined to the cold side ( 44 ) of the Peltier elements ( 42 ) are provided in the cold zone ( 31 ) and one or more heat-conducting second heat exchangers ( 34 ) joined to the warm side ( 43 ) of the Peltier elements ( 42 ) are provided in the warm zone ( 30 ), the first heat exchangers ( 35 ), the heat-insulating layer ( 29 ) and the walls ( 3 , 4 , 5 , 6 , 7 ) of the drawer dividing the cold zone ( 31 ) into a first inlet chamber ( 39 ) with a first inlet opening ( 36 ) into the service trolley and into a first outlet chamber ( 38 ) with a first outlet opening ( 37 ) into the service trolley.