Heat exchanger

Abstract

A heat exchanger includes: an inlet header tube including opposite first and second ends and an inner space formed between the first and second ends; an outlet header tube parallel to the inlet header tube; a plurality of heat exchange tubes transversely extending between and fluidly connected to the inlet and outlet header tubes, each of the heat exchange tubes having a connecting end connected to the inlet header tube; and a baffle tube inserted into the inner space of the inlet header tube. The baffle tube has an open end proximate to the first end, a closed end proximate to the second end, and a plurality of orifices disposed between the open and closed ends to fluidly intercommunicate the inner space of the inlet header tube and the baffle tube. Each of the orifices is disposed in alignment with the connecting end of one of the heat exchange tubes.

1 . A heat exchanger comprising:
 an inlet header tube including opposite first and second ends and an inner space formed between said first and second ends;   an outlet header tube substantially parallel to said inlet header tube;   a plurality of heat exchange tubes transversely extending between and fluidly connected to said inlet and outlet header tubes, each of said heat exchange tubes having a connecting end connected to said inlet header tube; and   a baffle tube inserted into said inner space of said inlet header tube from said first end to said second end, said baffle tube having an open end proximate to said first end, a closed end proximate to said second end, and a plurality of orifices disposed between said open and closed ends to fluidly intercommunicate said inner space of said inlet header tube and said baffle tube, each of said orifices being disposed in alignment with said connecting end of one of said heat exchange tubes.   
     
     
         2 . The heat exchanger of  claim 1 , wherein said orifices of said baffle tube include a first orifice disposed closest to said open end of said baffle tube, and a second orifice disposed adjacent to said first orifice oppositely of said open end, a remainder of said orifices being disposed on one side of said second orifice opposite to said first orifice, said first orifice being larger than said second orifice, said second orifice being larger than each of said remainder of said orifices. 
     
     
         3 . The heat exchanger of  claim 2 , wherein an area of an interior space of each of said heat exchange tubes is smaller than or equal to an area of said first orifice and is larger than an area of said second orifice. 
     
     
         4 . The heat exchanger of  claim 3 , wherein said first, second, and each of said remainder of said orifices have hole diameters that are respectively 1-1.26, 0.73, and 0.5 times an inner diameter of each of said heat exchange tubes. 
     
     
         5 . The heat exchanger of  claim 4 , wherein said inner diameter of each of said heat exchange tubes is 3 mm, and said hole diameters of said first, second, and each of said remainder of said orifices are respectively 3-3.8 mm, 2.2 mm, and 1.5 mm. 
     
     
         6 . The heat exchanger of  claim 5 , wherein said hole diameter of said first orifice is 3.8 mm. 
     
     
         7 . The heat exchanger of  claim 6 , wherein said baffle tube has a circular cross section with an inner diameter of 4 mm. 
     
     
         8 . The heat exchanger of  claim 7 , wherein a distance of said connecting end of said heat exchange tube from said first end of said inlet header tube is 3.5 mm, a center-to-center distance between adjacent ones of said orifices being 10 mm, a center-to-center distance between adjacent ones of said heat exchange tubes being 10 mm. 
     
     
         9 . The heat exchanger of  claim 1 , further comprising an inflow tube fluidly connected to said open end of said baffle tube. 
     
     
         10 . The heat exchanger of  claim 1 , wherein said inlet header tube has a square cross section. 
     
     
         11 . The heat exchanger of  claim 10 , wherein said square cross section of said inlet header tube has a width of 9 mm.