Heat exchanger

Abstract

A heat exchange device comprising at least one heat exchange surface ( 2 ), wherein the heat exchange surface comprises one or more parallel tubular lines ( 3 ), a rapper device and an impact area for the rapper device. The impact area comprises an impact block ( 6 ) with one or more inner channels ( 7 ) through which coolant flows bridging opposite open ends ( 5 ) of an interrupted tubular line of the heat exchange surface. The impact block ( 6 ) enforces the impact area of the heat exchange surface and translates impact energy caused by a rapper device very effectively into mechanical waves through the heating surface, resulting in an improved cleaning effect.

1 . A heat exchange device comprising at least one heat exchange surface, wherein the heat exchange surface comprises one or more parallel tubular lines and a rapper device and an impact area for the rapper device, the impact area comprising an impact block with one or more inner channels through which coolant flows, each inner channel bridging opposite open ends of an interrupted tubular line of the heat exchange surface. 
     
     
         2 . A heat exchange device according to  claim 1  wherein the tubular lines are coiled. 
     
     
         3 . A heat exchange device according to  claim 2  wherein transitional wedged tube sections each connect an inner channel in the impact block to the corresponding end of an interrupted coiled tube. 
     
     
         4 . A heat exchange device according to  claim 3 , wherein the contact faces between the transitional wedged tube sections and the impact block are perpendicular to the flat outer surface of the impact block. 
     
     
         5 . A heat exchange device according to  claim 1  wherein the impact block embeds two, three or four inner channels. 
     
     
         6 . A heat exchange device according to  claim 1  wherein the impact block carries an anvil. 
     
     
         7 . A heat exchange device according to  claim 1  wherein at the ends of the heat exchange surfaces each of the coiled tubes branches off from the corresponding heat exchange surface and bends away from an adjacent coiled tube, and wherein a reinforcement web extends between the bent part and the adjacent coiled tube. 
     
     
         8 . A heat exchange device according to  claim 1  wherein the heat exchange device comprises straight tubular lines forming a flat heat exchange surface. 
     
     
         9 . A heat exchange device according to  claim 8  wherein the impact block is positioned at one of the sides of the heat exchange surface. 
     
     
         10 . A heat exchange device according to  claim 9  wherein the impact block carries an anvil plate at its lateral side forming an impact area under right angles with the heat exchange surface.