Flat tube evaporator with vertical flat tubes for motor vehicles

Abstract

The invention relates to a flat tube evaporator for motor vehicle air conditioning equipments with flat tubes ( 2 ), the longitudinal extension direction of which is vertical, and zig zag fins ( 8 ) arranged between the flat tubes ( 2 ), against which the external heat exchange fluid can flow (arrow 9 ). According to the invention it is provided that a water flow gutter ( 50 ) extending downwards on both sides of the flat tubes ( 2 ) is designed next to the rear end region ( 52 ) of the zig zag fins ( 8 ), seen in the flow direction (arrow 9 ) of the external heat exchange fluid.

1 . Flat tube evaporator, preferably of aluminum or an aluminum alloy, for motor vehicle air conditioning equipments with flat tubes ( 2 ), the longitudinal extension direction of which is vertical, and zig zag fins ( 8 ) arranged between the flat tubes ( 2 ), against which the external heat exchange fluid, preferably air, can flow (arrow  9 ) longitudinally of the apexes ( 40 ) of their limbs ( 38 ) extending in a zig zag manner, 
 wherein a water flow gutter ( 50 ) is designed in continuous extension downwards on both sides of the flat tubes ( 2 ) following the rear end region ( 52 ) of the zig zag fins ( 8 ) seen in the flow direction (arrow  9 ) of the external heat exchange fluid,    characterized in that the water flow gutter ( 50 ) is shaped at the outer surface as an indentation ( 60 ) of the flat side of the flat tube ( 2 ) and is adjacent to the rear end region ( 52 ) of the zig zag fins ( 8 ) seen in the flow direction (arrow  9 ) of the external heat exchange fluid.    
     
     
         2 . Flat tube evaporator according to    claim 1   , characterized in that the design of the space ( 46 ) between adjacent limbs ( 38 ) of the zig zag fin ( 8 ) is narrower (at  44 ) adjacent to the water flow gutter ( 50 ) than adjacent to the apex ( 40 ).  
     
     
         3 . Flat tube evaporator according to    claim 1    or    claim 2   , characterized in that the connection ends of the flat tubes ( 2 ) are kept free from the respective indentation ( 60 ).