Heat exchanger

Abstract

A heat exchanger includes a plurality of fins arranged so that a plate thickness direction intersects an air flow direction and have mutually adjacent plate-shaped first and second fin units, and a plurality of heat transfer pipes inserted into the fins so as to intersect the air flow direction. The first and second fin units have heat conducting parts, upper water conveying parts, and lower water conveying parts. The upper water conveying part of the first fin unit projects a different amount from the upper water conveying part of the second fin unit, and an equal amount to the lower water conveying part of the second fin unit. The lower water conveying part of the first fin unit projects a different amount from the lower water conveying part of the second fin unit, and an equal amount to the upper water conveying part of the second fin unit.

1 . A heat exchanger comprising:
 a plurality of fins arranged so that a plate thickness direction intersects an air flow direction and having mutually adjacent plate-shaped first and second fin units; and   a plurality of heat transfer pipes inserted into the fins so as to intersect the air flow direction,   the first fin unit and the second fin unit having
 heat conducting parts arranged to exchange heat with air, 
 upper water conveying parts projecting upward from the heat conducting parts, and 
 lower water conveying parts projecting downward from the heat conducting parts; 
   an amount of projection of the upper water conveying part of the first fin unit differing from an amount of projection of the upper water conveying part of the second fin unit, and the amount of projection of the upper water conveying part of the first fin unit equaling an amount of projection of the lower water conveying part of the second fin unit; and   an amount of projection of the lower water conveying part of the first fin unit differing from the amount of projection of the lower water conveying part of the second fin unit, and the amount of projection of the lower water conveying part of the first fin unit equaling the amount of projection of the upper water conveying part of the second fin unit.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein
 the first fin unit and the second fin unit have bilateral symmetry with respect to a center line bisecting a width thereof along the air flow direction   
     
     
         3 . The heat exchanger according to  claim 1 , wherein
 each of the upper water conveying parts and the lower water conveying parts have a shape becoming narrower in width toward a tip thereof.   
     
     
         4 . The heat exchanger according to  claim 1 , wherein
 the fins are formed between adjacent heat transfer pipes by folding a plate-shaped member in a waveform at intervals of approximately 90 degrees.   
     
     
         5 . The heat exchanger according to  claim 2 , wherein
 each of the upper water conveying parts and the lower water conveying parts have a shape becoming narrower in width toward a tip thereof.   
     
     
         6 . The heat exchanger according to  claim 2 , wherein
 the fins are formed between adjacent heat transfer pipes by folding a plate-shaped member in a waveform at intervals of approximately 90 degrees.   
     
     
         7 . The heat exchanger according to  claim 3 , wherein
 the fins are formed between adjacent heat transfer pipes by folding a plate-shaped member in a waveform at intervals of approximately 90 degrees.