Heat exchanger

Abstract

The invention relates to a heat exchanger ( 10 ) having an elongate hollow body with connections ( 12, 12′, 13, 13′ ) for the supply and discharge of a first and of a second medium, in which the first medium is guided through the elongate hollow body in a counterflow with respect to a second medium, and the second medium flows through a spiral tube ( 11 ) which extends longitudinally axially between the end sides of the hollow body, and wherein a plurality of deflecting elements ( 18 ) projects into the hollow body interior from the hollow body inner casing, which deflecting elements deflect the flow of the first medium. To improve efficiency, it is provided that the deflecting elements project in an alternating sequence from in each case opposite hollow body sides into the hollow body interior and into the region of the spiral tube, in such a way that said deflecting elements end between two spirals, and that the hollow body inner casing has, in sections, a plurality of concavely-shaped constrictions.

1 . A heat exchanger, particularly for a swimming pool, the heat exchanger comprising:
 an elongated tubular body with connectors for inflow and outflow of a first and a second medium, the first medium being guided through the elongated tubular body in opposite or codirectional flow to the second medium,   a helicoidal pipe through which flows the second medium and that extends longitudinally axially between ends of the tubular body, and   multiple deflector vanes that deflect the flow of the first medium projecting into the tubular body interior from the inner surface of the tubular body, the deflector vanes projecting all the way into the region of the helicoidal pipe in an alternating sequence from opposite sides of the tubular body in such a manner that they end between two turns and that the inner surface of the tubular body has a plurality of separate concave constrictions.   
   
   
       2 . The heat exchanger according to  claim 1 , wherein the elongated tubular body is oval or elliptical in cross-section, the deflector vanes being preferably mounted on the narrow sides of the oval. 
   
   
       3 . The heat exchanger according to  claim 1  wherein two to three 360° turns lie between two adjacent deflector vanes. 
   
   
       4 . The heat exchanger according to  claim 1  wherein the helicoidal pipe is corrugated. 
   
   
       5 . The heat exchanger according to  claim 1  wherein the inner surface of the tubular body has a smooth surface. 
   
   
       6 . The heat exchanger according to  claim 1  wherein the deflector vanes are flat and preferably have a concave arcuate inner edge. 
   
   
       7 . The heat exchanger according to  claim 1  wherein the elongated tubular body, preferably including the deflector vanes, is made of polyamide. 
   
   
       8 . The heat exchanger according to  claim 7 , wherein the elongated tubular body consists of multiple pipe pieces that can be inserted into one another and are releasably connected with one another. 
   
   
       9 . The heat exchanger according to  claim 1  wherein the elongated tubular body has projecting tabs on its outer surface and each formed with a hole through which can pass a respective mounting screw. 
   
   
       10 . The heat exchanger according to  claim 9 , wherein in order to fasten the elongated tubular body to a wall, a bracket is provided having ends bent back through 180° and having bores aligned in top view, to allow a bolt or screw shaft to pass through. 
   
   
       11 . The heat exchanger according to  claim 10 , wherein the bracket has a concave center section that preferably has the same radius of curvature as the elongated tubular body. 
   
   
       12 . The heat exchanger according to  claim 1  wherein the deflector vanes are made from individual wall pieces that project into the tubular body interior perpendicularly or inclined by 2° to 3° from the perpendicular. 
   
   
       13 . The heat exchanger according to  claim 12 , wherein the deflector vanes project into the tubular body interior in an alternating sequence from opposite sides preferably by an edge dimension of ⅓ to 1/7 of the inside diameter of the tubular body. 
   
   
       14 . The heat exchanger according to  claim 1  wherein the inner surface of the tubular body is at least partially wave-shaped toward the longitudinal axis, constrictions of the diameter preferably amounting to 5% to 10% of the housing interior. 
   
   
       15 . The heat exchanger according to  claim 1  wherein the connectors for the first and the second medium are disposed on the ends. 
   
   
       16 . The heat exchanger according to  claim 1  wherein the helicoidal pipe is a heating coil that can be electrically heated. 
   
   
       17 . The heat exchanger according to  claim 1  wherein the heat exchanger is a flow-through heater.