Heat exchanger and air-conditioning apparatus

Abstract

A heat exchanger includes a plurality of flat tubes in which refrigerant flows and a plurality of fins provided between the plurality of flat tubes and configured to transfer heat of refrigerant flowing in the plurality of flat tubes. An upstream end portion of each of the plurality of flat tubes in an air flow direction is located at the same position as an upstream end portion of each of the plurality of fins or protrudes farther than the upstream end portion of each of the plurality of fins, and an opening port is formed at the upstream end portion of each of the plurality of flat tubes or at the upstream end portion of each of the plurality of fins.

1 . A heat exchanger comprising:
 a plurality of flat tubes in which refrigerant flows; and   a plurality of fins provided between the plurality of flat tubes and configured to transfer heat of refrigerant flowing in the plurality of flat tubes,   an upstream end portion of each of the plurality of flat tubes in an air flow direction being located at the same position as an upstream end portion of each of the plurality of fins or protruding farther than the upstream end portion of each of the plurality of fins,   an opening port being formed at the upstream end portion of each of the plurality of flat tubes or at the upstream end portion of each of the plurality of fins,   the opening port being a hole provided in the upstream end portion of each of the plurality of fins,   the hole extending in the air flow direction.   
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . A heat exchanger comprising:
 a plurality of flat tubes in which refrigerant flows; and   a plurality of fins provided between the plurality of flat tubes and configured to transfer heat of refrigerant flowing in the plurality of flat tubes,   an upstream end portion of each of the plurality of flat tubes in an air flow direction being located at the same position as an upstream end portion of each of the plurality of fins or protruding farther than the upstream end portion of each of the plurality of fins,   an opening port being formed at the upstream end portion of each of the plurality of flat tubes or at the upstream end portion of each of the plurality of fins,   the opening port being a gap defined between the upstream end portion of each of the plurality of fins and a corresponding one of the plurality of flat tubes,   the plurality of fins each having a smaller width at the upstream end portion than a width at a downstream end portion of the fin.   
     
     
         5 . A heat exchanger comprising:
 a plurality of flat tubes in which refrigerant flows; and   a plurality of fins provided between the plurality of flat tubes and configured to transfer heat of refrigerant flowing in the plurality of flat tubes,   an upstream end portion of each of the plurality of flat tubes in an air flow direction being located at the same position as an upstream end portion of each of the plurality of fins or protruding farther than the upstream end portion of each of the plurality of fins,   an opening port being formed at the upstream end portion of each of the plurality of flat tubes or at the upstream end portion of each of the plurality of fins,   the opening port being a gap defined between the upstream end portion of each of the plurality of fins and a corresponding one of the plurality of flat tubes,   the plurality of flat tubes each having a smaller width at the upstream end portion than a width at a downstream end portion of the flat tube.   
     
     
         6 . The heat exchanger of  claim 1 , wherein each of the plurality of fins has an opening-closing louver provided at the opening port and configured to open and close the opening port. 
     
     
         7 . A heat exchanger comprising:
 a plurality of flat tubes in which refrigerant flows;   a plurality of fins provided between the plurality of flat tubes and configured to transfer heat of refrigerant flowing in the plurality of flat tubes, the plurality of fins each protruding at an upstream end portion in an air flow direction farther than an upstream end portion of each of the plurality of flat tubes; and   a reinforcement portion provided between portions of the plurality of fins each protruding farther than the plurality of flat tubes and configured to reinforce the plurality of fins,   the opening port being a hole provided in the upstream end portion of each of the plurality of fins,   the hole extending in the air flow direction.   
     
     
         8 . A heat exchanger comprising:
 a plurality of flat tubes in which refrigerant flows; and   a plurality of fins provided between the plurality of flat tubes and configured to transfer heat of refrigerant flowing in the plurality of flat tubes, the plurality of fins each protruding at an upstream end portion in an air flow direction farther than an upstream end portion of each of the plurality of flat tubes,   a reinforcement portion being formed at the upstream end portion of each of the plurality of fins, the reinforcement portion being shaped into a projection and a recess and configured to reinforce the plurality of fins,   the opening port being a hole provided in the upstream end portion of each of the plurality of fins,   the hole extending in the air flow direction.   
     
     
         9 . An air-conditioning apparatus comprising the heat exchanger of  claim 1 . 
     
     
         10 . An air-conditioning apparatus comprising the heat exchanger of  claim 4 . 
     
     
         11 . An air-conditioning apparatus comprising the heat exchanger of  claim 5 . 
     
     
         12 . An air-conditioning apparatus comprising the heat exchanger of  claim 6 . 
     
     
         13 . An air-conditioning apparatus comprising the heat exchanger of  claim 7 . 
     
     
         14 . An air-conditioning apparatus comprising the heat exchanger of  claim 8 .