Heat exchanger

Abstract

The heat exchanger includes heat transfer tubes 12 , heat transfer fins 13 a , which are arranged along a direction perpendicular to axes of the heat transfer tubes 12 , cut-and-raised pieces 14 , which are provided on a heat transfer surface of each heat transfer fin 13 a . A cut, which extends along the lengthwise direction, is provided at the lower end or at the upper and lower ends of each cut-and-raised piece 14 . The cuts guide condensed water generated on the surfaces of the heat transfer fins.

1 . A heat exchanger comprising a heat transfer tube, a plurality of heat transfer fins arranged along a direction perpendicular to an axis of the heat transfer tube to be parallel to each other, and a cut-and-raised piece provided on a heat transfer surface of each heat transfer fin, the heat exchanger being characterized in that:
 a linear portion is provided at the lower end of each cut-and-raised piece, wherein the linear portion extends downward and guides condensed water generated on the heat transfer surface downward.   
     
     
         2 . The heat exchanger according to  claim 1 , characterized in that a linear portion, which extends upward and guides condensed water downward, is provided at the upper end of each cut-and-raised piece. 
     
     
         3 . The heat exchanger according to  claim 1  or  2 , characterized in that each cut-and-raised piece is split into an upper part and a lower part, and the linear portion, which extends along a lengthwise direction and guides the condensed water downward, is provided between the upper part and the lower part. 
     
     
         4 . The heat exchanger according to  claim 1 , characterized in that each linear portion communicates with the interior of the associated cut-and-raised piece. 
     
     
         5 . The heat exchanger according to  claim 1 , characterized in that an upper end and a lower end of each cut-and-raised piece are inclined, and the linear portions are provided at narrow angle portions of the upper end and the lower end of each cut-and-raised piece. 
     
     
         6 . The heat exchanger according to  claim 1 , characterized in that an upper end and a lower end of each cut-and-raised piece are inclined, and the linear portion at the upper end of each cut-and-raised piece is provided at a wide angle portion of the cut-and-raised piece. 
     
     
         7 . The heat exchanger according to  claim 1 , characterized in that the linear portion is provided at the center of the end portions of each cut-and-raised piece. 
     
     
         8 . The heat exchanger according to  claim 1 , characterized in that the linear portions extend along a step pitch of the heat transfer fins 
     
     
         9 . The heat exchanger according to  claim 1 , characterized in that the linear portion at the upper end or the lower end of each cut-and-raised piece extends diagonally to avoid a fin collar in which the heat transfer tube is inserted. 
     
     
         10 . The heat exchanger according to  claim 1 , characterized by a drainage rib, which is located along a front edge or a rear edge of the heat transfer fins, wherein the drainage rib is located close to or connected to the linear portion at the lower end of each cut-and-raised piece. 
     
     
         11 . The heat exchanger according to  claim 1 , characterized in that the linear portions are linear cuts. 
     
     
         12 . The heat exchanger according to  claim 1 , characterized in that the linear portions are linear grooves. 
     
     
         13 . The heat exchanger according to  claim 1 , characterized in that the cut-and-raised pieces are louvers. 
     
     
         14 . The heat exchanger according to  claim 1 , characterized in that the heat exchanger is a heat exchanger for an air conditioner indoor unit.