Device for cooling of heat-generating units

Abstract

The present invention relates to a method and an apparatus for cooling heat generating units, such as mobile telephone equipment in a radio base station. By providing a heat exchanger ( 69 ) having crossing flow directions for an internal vertical air flow ( 76 ) and external lateral, cooling air flows ( 70, 73 ) in a vertical area, such as a wall portion to the radio base station, for instance as a part of a door to the radio base station, excellent cooling may be achieved without substantially affecting the space by means of the heat exchanging function, which is intented for the equipment.

1 . Climate module to be arranged in a wall- or door portion of an outdoor cabinet for cooling heat generating units enclosed in said outdoor cabinet, comprising at least: 
 a first and a second heat exchanger ( 18 ,  21 ;  47 ,  48 ) adapted for heat exchange between internal and external air flows ( 19 ,  17 ,  20 ;  49 ,  45 ,  46 ), whereby the internal air flow ( 19 ;  49 ) is adapted to be taken from and be returned to the outdoor cabinet, and a first and a second external air flow ( 17 ,  20 ;  45 ,  46 ) are adapted to be taken from and be recirculated to outdoor air, characterised in that    the first heat exchanger ( 18 ,  47 ) is arranged in series with the second heat exchanger ( 21 ,  48 ) with respect to the internal air flow ( 19 ;  49 ), and    the first heat exchanger ( 18 ,  47 ) is arranged in parallel with the second heat exchanger ( 21 ,  48 ) with respect to the first and second external air flows ( 17 ,  20 ;  45 ,  46 ).    
     
     
         2 . Climate module according to  claim 1 , wherein the first external air flow ( 17 ;  45 ) is adapted to flow through the first heat exchanger ( 18 ;  47 ), and the second external air flow ( 20 ;  46 ) is adapted to flow through the second heat exchanger ( 21 ;  48 ).  
     
     
         3 . Climate module according to  claim 2 , wherein the first external air flow ( 17 ;  45 ) is counter-current the second external air flow ( 20 ;  46 ).  
     
     
         4 . Climate module according to any of claim  1 - 3 , wherein the internal air flow ( 19 ;  49 ) is adapted to flow vertically through the first and second heat exchanger ( 18 ,  21 ;  47 ,  48 ), while the first and second external air flows ( 17 ,  20 ;  45 ,  46 ) are adapted to flow horizontally through the first and second heat exchanger ( 18 ,  21 ;  47 ,  48 ).  
     
     
         5 . Climate module according to any of claim  1 - 4 , wherein 
 the first heat exchanger ( 18 ;  47 ) comprises an inlet opening ( 2 ;  32 ) for the internal air flow ( 19 ;  49 ), an inlet opening ( 7 ;  35 ) for the first external air flow ( 17 ;  45 ), and an outlet opening ( 9 ;  40 ) for the first external air flow ( 17 ;  45 ), and    the second heat exchanger ( 21 ;  48 ) comprises an outlet opening ( 4 ;  34 ) for the internal air flow ( 19 ;  49 ), an inlet opening ( 13 ;  36 ) for the second external air flow ( 20 ;  46 ) and an outlet opening ( 11 ;  41 ) for the second external air flow ( 20 ;  46 ).    
     
     
         6 . Climate module according to any of claim  1 - 5 , wherein at least one fan ( 6 ;  44 ) is provided for the internal air flow ( 19 ;  49 ) for intake to, passage through, and exhaust from, the first and the second heat exchanger ( 18 ,  21 ;  47 ,  48 ).  
     
     
         7 . Climate module according to any of claim  1 - 6 , wherein at least one fan ( 15 ,  16 ;  37 ,  38 ) is arranged for the first and second external air flows ( 17 ,  20 ;  45 ,  46 ) for intake to, passage through, and exhaust from, the first and the second heat exchanger ( 18 ,  21 ;  47 ,  48 ).