Heat exchanger and method for its production

Abstract

The invention relates to a heat exchanger having a multiplicity of heat-exchanger tubes in which a fluid, such as a coolant, can flow, and whose ends are held in collecting tanks. At least two collecting volumes which are separated from one another by an insert are arranged at least in one collecting tank. A separating cut which separates the insert and therefore also the collecting tank is formed in the heat exchanger.

1 . Heat exchanger having a multiplicity of heat-exchanger tubes in which a fluid, such as a coolant, can flow, and whose ends are held in collecting tanks, with at least two collecting volumes which are separated from one another by an insert being arranged at least in one collecting tank,
 wherein in that   a separating cut which separates the collecting tank is formed in the insert.   
   
   
       2 . Heat exchanger according to  claim 1 , wherein the two parts of the insert form outer walls of two collecting tanks. 
   
   
       3 . Heat exchanger according to  claim 1 , wherein the insert is sealingly connected along its periphery to the collecting tank. 
   
   
       4 . Heat exchanger according to  claim 1 , wherein the insert is a solid separating element. 
   
   
       5 . Heat exchanger according to  claim 1 , wherein the insert has a recess in the region of the intended separating process. 
   
   
       6 . Heat exchanger according to  claim 1 , wherein the insert comprises a heat-exchanging tube which is separated along its longitudinal axis by the separating process. 
   
   
       7 . Heat exchanger according to  claim 6 , wherein the heat-exchanging tube which is comprised by the insert is composed of the same semifinished part as a heat-exchanging tube which is traversed by coolant. 
   
   
       8 . Heat exchanger according to  claim 6 , wherein the heat-exchanging tube serves as a connecting element between two heat-exchanging units. 
   
   
       9 . Heat exchanger according to one of  claims 1 , wherein the insert comprises two metal sheets. 
   
   
       10 . Heat exchanger according to  claim 1 , wherein the separating cut does not extend as far as an opposite collecting tank. 
   
   
       11 . Heat exchanger according to  claim 10 , wherein the separating cut has a length in the range from 10 to 75%, in particular in the range from 10 to 50% and very particularly a length in the range from 10 to 25% of the heat-exchanging unit. 
   
   
       12 . Heat exchanger according to  claim 1 , wherein at least one separating cut is also formed in a second collecting tank. 
   
   
       13 . Method for producing a heat exchanger according to  claim 1 , having the following method steps:
 arranging the heat-exchanging tubes, the collecting tanks and the insert of the heat exchanger,   joining said elements,   separating at least one collecting tank in the region of the insert.   
   
   
       14 . Method according to  claim 13 , wherein during the arrangement of the elements of the heat exchanger, a heat-exchanging tube or metal sheet is held in the insert, which heat-exchanging tube or metal sheet is substantially the same length as or longer than a heat-exchanging tube which is traversed by the fluid, such as coolant. 
   
   
       15 . Method according to  claim 13 , wherein the insert is inserted into the water tank before or after the arrangement of the heat-exchanging tubes. 
   
   
       16 . Method according to  claim 13 , wherein the separation of the water tanks takes place before or after the joining of the heat exchanger.