Condenser

Abstract

A condenser includes a pair of headers 11 and a plurality of heat exchanging tubes 12 disposed between the headers 11 with their opposite ends connected to the headers 11 . The plurality of heat exchanging tubes 12 are grouped into three paths P 1 -P 3 by partitions 16 . A refrigerant introduced from a refrigerant inlet 11 a provided at the lower portion of one of headers passes upwardly through the paths P 1 -P 3 in sequence, and flows out of a refrigerant outlet 11 b provided at an upper portion of one of headers. The cross-sectional area of each path decreases stepwise towards a downstream side path, and the reduction rate of the cross-sectional are of the downstream side path of the adjacent two paths to the cross-sectional area of the upstream side path thereof is set to 20%. Thereby, the cooling performance can be achieved.

What is claimed is:  
     
         1 . A condenser, comprising: 
 a pair of right and left headers;    a plurality of heat exchanging tubes disposed between said headers with opposite ends thereof connected with said headers;    at least one partition provided in one of said headers to group said plurality of heat exchanging tubes into a plurality of paths;    a refrigerant inlet provided at a lower portion of one of said headers; and    a refrigerant outlet provided at an upper portion of one of said headers;    wherein a refrigerant introduced from said refrigerant inlet passes upwardly through said plurality of paths in sequence in a meandering manner, and flows out of said refrigerant outlet,    wherein a cross-sectional area of each of said paths decreases stepwise towards a downstream side of said paths for each path, and    wherein a reduction rate of a cross-sectional area of a downstream side path of adjacent two paths to a cross-sectional area of an upstream side path thereof is 20% or more.    
     
     
         2 . The condenser as recited in  claim 1 , wherein said headers are disposed vertically, and wherein said plurality of heat exchanging tubes are disposed horizontally at predetermined intervals.  
     
     
         3 . The condenser as recited in  claim 2 , wherein said cross-sectional area of said downstream side path is smaller than that of said upstream side path in any adjacent two paths.  
     
     
         4 . The condenser as recited in  claim 1 , wherein said plurality of paths comprise three or more paths including a first path, a second path and a third path through which said refrigerant introduced from said refrigerant inlet passes in sequence, wherein a reduction rate of a cross-sectional area of said second path to a cross-sectional area of said first path is 50% or more, and wherein a reduction rate of a cross-sectional area of said third path to a cross-sectional area of said second path is 40% or more.  
     
     
         5 . The condenser as recited in  claim 2 , wherein said plurality of paths comprise three or more paths including a first path, a second path and a third path through which said refrigerant introduced from said refrigerant inlet passes in sequence, wherein a reduction rate of a cross-sectional area of said second path to a cross-sectional area of said first path is 50% or more, and wherein a reduction rate of a cross-sectional area of said third path to a cross-sectional area of said second path is 40% or more.  
     
     
         6 . The condenser as recited in  claim 1 , wherein said plurality of heat exchanging tubes are grouped into 2 to 5 paths.  
     
     
         7 . The condenser as recited in  claim 4 , wherein said plurality of heat exchanging tubes are grouped into 3 paths.  
     
     
         8 . The condenser as recited in  claim 5 , wherein said plurality of heat exchanging tubes are grouped into 3 paths.  
     
     
         9 . The condenser as recited in  claim 4 , wherein each of said reduction rates is attained by decreasing the number of said heat exchanging tubes constituting each of said paths.  
     
     
         10 . The condenser as recited in  claim 5 , wherein each of said reduction rates is attained by decreasing the number of said heat exchanging tubes constituting each of said paths.  
     
     
         11 . A condenser, comprising: 
 a plurality of paths arranged one on the other, each of said paths including a plurality of heat exchanging tubes;    a header portion connected to corresponding ends of adjacent upper and lower paths;    a refrigerant inlet provided at a lowermost path; and    a refrigerant outlet provided at an uppermost path,    wherein a refrigerant introduced from said refrigerant inlet goes upwardly from said lowermost path towards said uppermost path while making a U-turn in said header portion, and flows out of said refrigerant outlet, and    wherein a reduction rate of a cross-sectional area of a downstream side path of adjacent two paths to a cross-sectional area of an upstream side path thereof is 20% or more.    
     
     
         12 . The condenser as recited in  claim 11 , wherein said plurality of paths comprises three or more paths including a first path, a second path and a third path through which said refrigerant introduced from said refrigerant inlet passes in sequence, wherein a reduction rate of a cross-sectional area of said second path to a cross-sectional area of said first path is 50% or more, and wherein a reduction rate of a cross-sectional area of said third path to a cross-sectional area of said second path is 40% or more.  
     
     
         13 . The condenser as recited in  claim 11 , wherein said plurality of paths are 2 to 5 paths.  
     
     
         14 . The condenser as recited in  claim 11 , wherein said plurality of paths are 3 paths.  
     
     
         15 . The condenser as recited in  claim 12 , wherein said plurality of paths are 3 paths.  
     
     
         16 . The condenser as recited in  claim 11 , wherein each of said reduction rates is attained by decreasing the number of said heat exchanging tubes constituting each of said paths.  
     
     
         17 . The condenser as recited in  claim 12 , wherein each of said reduction rates is attained by decreasing the number of said heat exchanging tubes constituting each of said paths.  
     
     
         18 . A condenser, comprising: 
 a first header portion with a refrigerant inlet;    a lowermost first path including a plurality of heat exchanging tubes whose one end being connected with said first header portion;    a final header portion with a refrigerant outlet;    an uppermost final path including a plurality of heat exchanging tubes whose one end being connected with said final header portion;    one or a plurality of middle paths each including a plurality of heat exchanging tubes; and    a plurality of middle header portions each connecting corresponding one ends of adjacent paths,    wherein a refrigerant introduced from said refrigerant inlet flows upwards through said plurality of paths in sequence in a meandering manner via each of said header portions, and flows out of said refrigerant, and    wherein a reduction rate of a cross-sectional area of a downstream side path of adjacent two paths to a cross-sectional area of a upstream side path thereof is 20% or more.    
     
     
         19 . The condenser as recited in  claim 18 , wherein said plurality of paths include three or more paths including a first path, a second path and a third path through which said refrigerant introduced from said refrigerant inlet passes in sequence, wherein a reduction rate of a cross-sectional area of said second path to a cross-sectional area of said first path is 50% or more, and wherein a reduction rate of a cross-sectional area of said third path to a cross-sectional area of said second path is 40% or more.  
     
     
         20 . The condenser as recited in  claim 19 , wherein each of said reduction rates is attained by decreasing the number of said heat exchanging tubes constituting each of said paths.