Plane type heat exchanger

Abstract

The present invention relates to a plane type heat exchanger that has a simple structure and can be easily manufactured by substituting a rectangular plane type for a spiral cylindrical type of the structure of a heat exchange pipe according to the related art which is used for a heat exchanger using combustion gas that is heated by a burner and makes laminar flow. According to the present invention, the plane type heat exchanger having heat exchange pipes, through which heating water flows, and makes heat exchange by contacting with laminar-flow combustion gas, the plane type heat exchanger, includes: a plurality of heat exchange pipes that have a rectangular cross section with a larger width of a side, which contacts with the combustion gas, than the height, and are arranged at regular intervals in parallel with each other; inner plates where both ends of the heat exchange pipes are inserted to be fixed at regular intervals; and outer plates that are communicated with the heat exchange pipes through the inner plates and form spaces covering the outer surfaces of the inner plates.

1 . A plane type heat exchanger that has heat exchange pipes, through which heating water flows, and makes heat exchange by contacting with laminar-flow combustion gas, the plane type heat exchanger comprising:
 a plurality of heat exchange pipes that have a rectangular cross section with a larger width of a side, which contacts with the combustion gas, than the height, and are arranged at regular intervals in parallel with each other;   inner plates where both ends of the heat exchange pipes are inserted to be fixed at regular intervals; and   outer plates that are communicated with the heat exchange pipes through the inner plates and form spaces covering the outer surfaces of the inner plates.   
     
     
         2 . The plane type heat exchanger according to  claim 1 , wherein insertion holes having sizes close to the cross-sectional area of the heat exchange pipes are formed, at positions corresponding to the heat exchange pipes, through the inner plates and both ends of the heat exchange pipes are inserted in the insertion holes. 
     
     
         3 . The plane type heat exchanger according to  claim 1 , a sub-plate is provided between the inner plate and the outer plate. 
     
     
         4 . The plane type heat exchanger according to  claim 3 , wherein flow channel holes having sizes smaller than the cross section of the heat exchange pipes are formed through the sub-plate. 
     
     
         5 . The plane type heat exchanger according to  claim 4 , wherein both ends of the heat exchange pipes are in close contact with the sub-plates. 
     
     
         6 . The plane type heat exchanger according to  claim 3 , wherein brazing is applied to between the inner plate and the sub-plate, the heat exchange pipe and the inner plate, and the heat exchange pipe and the sub-plate. 
     
     
         7 . The plane type heat exchanger according to  claim 1 , wherein brazing is applied to portions where both ends of the heat exchange pipe is inserted in the inner plate. 
     
     
         8 . The plane type heat exchanger according to  claim 1 , wherein the outer plate is divided into a plurality of sections.