Heat exchanger and air conditioner

Abstract

Each of a plurality of heat-transfer portions has a plurality of protrusions which are protruded toward an air passage and extend in a direction intersecting with an airflow direction. The protrusions are arranged in the airflow direction.

1 - 9 . (canceled) 
     
     
         10 . A heat exchanger, comprising:
 a plurality of flat tubes arranged one above another such that flat surfaces thereof face each other and each having therein a passage of a fluid; and   a plurality of fins configured to divide a space between adjacent ones of the flat tubes into a plurality of air passages through which air flows,   each of the plurality of fins including
 a plurality of plate-like heat-transfer portions each of which extends from one to the other of the adjacent flat tubes and comprises a side wall of each of the air passages, and 
 a downwind side plate connected to a downwind side edge of each of the heat-transfer portions and serving as a discharge path, wherein 
   each of the plurality of heat-transfer portions has a plurality of protrusions which are protruded toward the air passage and extend in a direction intersecting with an airflow direction, and the plurality of protrusions are arranged in the airflow direction,   the plurality of protrusions include an upwind protrusion provided at an upwind side of the air passage, and a downwind protrusion provided at a downwind side of the air passage, and   in the heat-transfer portion, a height of a flat portion provided in an area between the upwind protrusion and the flat tube located below is greater than a height of a flat portion provided in an area between the downwind protrusion and the flat tube located below.   
     
     
         11 . A heat exchanger, comprising:
 a plurality of flat tubes arranged one above another such that flat surfaces thereof face each other and each having therein a passage of a fluid; and   a plurality of fins configured to divide a space between adjacent ones of the flat tubes into a plurality of air passages through which air flows,   each of the plurality of fins including
 a plurality of plate-like heat-transfer portions each of which extends from one to the other of the adjacent flat tubes and comprises a side wall of each of the air passages, and 
 a downwind side plate connected to a downwind side edge of each of the heat-transfer portions and serving as a discharge path, wherein 
   each of the plurality of heat-transfer portions has a plurality of protrusions which are protruded toward the air passage and extend in a direction intersecting with an airflow direction, and the plurality of protrusions are arranged in the airflow direction, and   a height including the heights of the flat portions provided in the area between the plurality of protrusions and the flat tube located below is reduced in a direction from the upwind side to the downwind side.   
     
     
         12 . A heat exchanger, comprising:
 a plurality of flat tubes arranged one above another such that flat surfaces thereof face each other and each having therein a passage of a fluid; and   a plurality of fins configured to divide a space between adjacent ones of the flat tubes into a plurality of air passages through which air flows,   each of the plurality of fins including
 a plurality of plate-like heat-transfer portions each of which extends from one to the other of the adjacent flat tubes and comprises a side wall of each of the air passages, and 
 a downwind side plate connected to a downwind side edge of each of the heat-transfer portions and serving as a discharge path, wherein 
   each of the plurality of heat-transfer portions has a plurality of protrusions which are protruded toward the air passage and extend in a direction intersecting with an airflow direction, and the plurality of protrusions are arranged in the airflow direction, and   the height of the flat portion provided in the area between a lower end of at least one protrusion of the plurality of protrusions and the flat tube located below the lower end of the protrusion is reduced in the direction from the upwind side to the downwind side.   
     
     
         13 . The heat exchanger of  claim 10 , wherein
 the protrusion is tilted with respect to a vertical direction such that a lower end of the protrusion is located downwind of an upper end of the protrusion.   
     
     
         14 . The heat exchanger of  claim 10 , wherein
 each of the plurality of fins is in a plate-like shape having, in an upwind side thereof, a plurality of cutouts for inserting the flat tubes; the fins are arranged in an extension direction of the flat tube, with a predetermined space between adjacent ones of the fins; and the flat tube is fitted to a periphery of the cutout, and   in the fin, an area between vertically adjacent ones of the cutouts comprises the heat-transfer portion, and a vertically extending portion continuous with the downwind side edge of each of the heat-transfer portions comprises the downwind side plate.   
     
     
         15 . The heat exchanger of  claim 14 , wherein
 the downwind side plate is provided with a rib extending along the downwind side edges of the plurality of heat-transfer portions.   
     
     
         16 . The heat exchanger of  claim 14 , wherein
 the fin includes a raised portion that is cut and bent toward the air passage, and   a bent surface of the raised portion is tilted with respect to a horizontal plane.   
     
     
         17 . An air conditioner, comprising a refrigerant circuit in which the heat exchanger of  claim 10  is provided, wherein
 the refrigerant circuit performs a refrigeration cycle by circulating a refrigerant. 
 
     
     
         18 . The heat exchanger of  claim 11 , wherein
 the protrusion is tilted with respect to a vertical direction such that a lower end of the protrusion is located downwind of an upper end of the protrusion.   
     
     
         19 . The heat exchanger of  claim 12 , wherein
 the protrusion is tilted with respect to a vertical direction such that a lower end of the protrusion is located downwind of an upper end of the protrusion.   
     
     
         20 . The heat exchanger of  claim 11 , wherein
 each of the plurality of fins is in a plate-like shape having, in an upwind side thereof, a plurality of cutouts for inserting the flat tubes; the fins are arranged in an extension direction of the flat tube, with a predetermined space between adjacent ones of the fins; and the flat tube is fitted to a periphery of the cutout, and   in the fin, an area between vertically adjacent ones of the cutouts comprises the heat-transfer portion, and a vertically extending portion continuous with the downwind side edge of each of the heat-transfer portions comprises the downwind side plate.   
     
     
         21 . The heat exchanger of  claim 12 , wherein
 each of the plurality of fins is in a plate-like shape having, in an upwind side thereof, a plurality of cutouts for inserting the flat tubes; the fins are arranged in an extension direction of the flat tube, with a predetermined space between adjacent ones of the fins; and the flat tube is fitted to a periphery of the cutout, and   in the fin, an area between vertically adjacent ones of the cutouts comprises the heat-transfer portion, and a vertically extending portion continuous with the downwind side edge of each of the heat-transfer portions comprises the downwind side plate.   
     
     
         22 . The heat exchanger of  claim 13 , wherein
 each of the plurality of fins is in a plate-like shape having, in an upwind side thereof, a plurality of cutouts for inserting the flat tubes; the fins are arranged in an extension direction of the flat tube, with a predetermined space between adjacent ones of the fins; and the flat tube is fitted to a periphery of the cutout, and   in the fin, an area between vertically adjacent ones of the cutouts comprises the heat-transfer portion, and a vertically extending portion continuous with the downwind side edge of each of the heat-transfer portions comprises the downwind side plate.   
     
     
         23 . The heat exchanger of  claim 15 , wherein
 the fin includes a raised portion that is cut and bent toward the air passage, and   a bent surface of the raised portion is tilted with respect to a horizontal plane.   
     
     
         24 . An air conditioner, comprising a refrigerant circuit in which the heat exchanger of  claim 11  is provided, wherein
 the refrigerant circuit performs a refrigeration cycle by circulating a refrigerant. 
 
     
     
         25 . An air conditioner, comprising a refrigerant circuit in which the heat exchanger of  claim 12  is provided, wherein
 the refrigerant circuit performs a refrigeration cycle by circulating a refrigerant. 
 
     
     
         26 . An air conditioner, comprising a refrigerant circuit in which the heat exchanger of  claim 13  is provided, wherein
 the refrigerant circuit performs a refrigeration cycle by circulating a refrigerant. 
 
     
     
         27 . An air conditioner, comprising a refrigerant circuit in which the heat exchanger of  claim 14  is provided, wherein
 the refrigerant circuit performs a refrigeration cycle by circulating a refrigerant. 
 
     
     
         28 . An air conditioner, comprising a refrigerant circuit in which the heat exchanger of  claim 15  is provided, wherein
 the refrigerant circuit performs a refrigeration cycle by circulating a refrigerant. 
 
     
     
         29 . An air conditioner, comprising a refrigerant circuit in which the heat exchanger of  claim 16  is provided, wherein
 the refrigerant circuit performs a refrigeration cycle by circulating a refrigerant.