Heat exchanger

Abstract

A heat exchanger is provided. The heat exchanger includes at least one fin provided with a plurality of slits and a plurality of refrigerant tubes penetrating the fin. The refrigerant tubes include at least one front line tube and at least one rear line tube having a different diameter from the front line tube with reference to a fluid flow direction. The slits include at least one front line slit and at least one rear line slit having a difference width with reference to the fluid flow direction.

1 . A heat exchanger comprising:
 at least one fin provided with a plurality of slits; and   a plurality of refrigerant tubes penetrating the fin;   wherein, the refrigerant tubes include at least one front line tube and at least one rear line tube having a different diameter from the front line tube with reference to a fluid flow direction; and   the slits include at least one front line slit and at least one rear line slit having a difference width with reference to the fluid flow direction.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein the diameter of the front line tube is less than the diameter of the rear line tube; and
 the width of the front line slit is less than the width of the rear line slit.   
     
     
         3 . The heat exchanger according to  claim 2 , wherein the front and rear line slits are arranged in a plurality of lines in a direction in parallel with the fluid flow direction. 
     
     
         4 . The heat exchanger according to  claim 3 , wherein the fins and slits are arranged to satisfy the following:
   0.5≦ A 1/ A 2≦0.9     0.6 mm≦ A 1≦1.2 mm   where, A 1  is a distance from a front end of the fin to the front line slit in a first line with reference to the fluid flow direction; and   A 2  is a distance from a rear end of the fin to the rear line slit in a last line.   
     
     
         5 . The heat exchanger according to  claim 3 , wherein a distance between the front line slits is less than a distance between the rear line slits. 
     
     
         6 . The heat exchanger according to  claim 3 , wherein a distance between the front line slits is equal to or greater than a width of the front line slit; and
 a distance between the rear line slits is equal to or greater than a width of the rear line slit.   
     
     
         7 . The heat exchanger according to  claim 6 , wherein the width of the front line slit and the width of the rear line slit are set to satisfy the following:
   0.8 mm≦ w 1≦1.1 mm     0.65≦ w 1/ w 2≦1.0   where, the w 1  is the width of the front line slit and the w 2  is the rear line slit.   
     
     
         8 . The heat exchanger according to  claim 6 , wherein the diameter of the front line tube, the diameter of the rear line tube, the width of the front line slit, and the width of the rear line slit are set to satisfy the following:
   0.7≦ w 1/ d 1≦1.0     0.5≦ w 2/ d 2≦1.0   where, the d 1  is the diameter of the front line tube, the d 2  is the diameter of the rear line tube, w 1  is the width of the front line slit, and w 2  is the width of the rear line slit.   
     
     
         9 . The heat exchanger according to  claim 1 , wherein a distance (cw) from an imaginary line interconnecting the front line tubes or the rear line tubes to the slit adjacent to the imaginary line is equal to or greater than 0.5 mm. 
     
     
         10 . The heat exchanger according to  claim 1 , wherein the front line slits are arranged in two or more lines and the rear line slits are arranged in three or more lines. 
     
     
         11 . A heat exchanger comprising:
 a plurality of refrigerant tubes along which refrigerant flows; and   at least one fin through which the refrigerant tubes pass,   wherein the refrigerant tubes include front and rear line tubes with reference to a fluid flow direction;   a diameter of the front line tube is less than a diameter of the rear line tube; and   the front and rear tubes penetrate one fin.   
     
     
         12 . The heat exchanger according to  claim 11 , wherein a ratio between the diameter of the front line tube and the diameter of the rear line tube is 1:1.1˜1.5. 
     
     
         13 . The heat exchanger according to  claim 12 , wherein, when a horizontal distance from a front end of the fin to a center of the front line tube is L 1 , a horizontal distance from a rear end of the fin to a center of the rear line tube is L 2 , and a horizontal distance from the center of the front tube to the center of the rear line tube is R, a ratio between L 1  and R is 1:2.0˜2.5 and a ratio between L 2  and R is 1:1.7˜2.2. 
     
     
         14 . The heat exchanger according to  claim 12 , wherein a horizontal length from a rear end of the fin to a center of the rear line tube is greater than a horizontal distance from a front end of the fin to a center of the front line tube. 
     
     
         15 . The heat exchanger according to  claim 12 , wherein, when a horizontal distance from a front end of the fin to a center of the front line tube is L 1  and a horizontal distance from a rear end of the fin to a center of the rear line tube is L 2 , the fin and front and rear tubes are arranged to satisfy the following:
   2 L 1− D 1<4.5 mm,     2 L 2− D 2<4.5 mm   
     
     
         16 . A heat exchanger comprising:
 a plurality of refrigerant tubes along which refrigerant flows; and   at least one fin through which the refrigerant tubes pass,   wherein the refrigerant tubes include front and rear line tubes with reference to a fluid flow direction;   the fins include at least one front line fin through which the front line tube passes and at least one rear line fin through which the rear tube passes, the rear line tube being separately formed with the front line tube; and   a diameter of the front line tube is less than the rear line tube.   
     
     
         17 . The heat exchanger according to  claim 16 , wherein a ratio between the diameter of the front line tube and the diameter of the rear line tube is 1:1.1˜1.5. 
     
     
         18 . The heat exchanger according to  claim 17 , wherein the front and rear line tubes are designed to satisfy the following:
   1.6< W 1/ D 1<2.2     1.4< W 2/ D 2<2.0   where, the D 1  is the diameter of the front line tube, the D 2  is the diameter of the rear line tube, the W 1  is a width of the front line fin, and the W 2  is a width of the rear line fin.   
     
     
         19 . The heat exchanger according to  claim 17 , wherein a width of the front line fin is less than a width of the rear line fin. 
     
     
         20 . The heat exchanger according to  claim 17 , wherein a ratio between a width of the front line fin and a width of the rear line fin is 1:1.1˜1.5.