Indoor heat exchanger and air conditioning apparatus

Abstract

An indoor heat exchanger in an indoor unit of an air conditioning apparatus, includes: flat tubes that are juxtaposed in a vertical direction and that each comprise a flow channel that allows refrigerant to pass through an inner portion thereof, and heat transfer fins joined to the flat tubes. The heat transfer fins each include: a first portion that extends continuously in the vertical direction; and second portions that are disposed between the flat tubes. The first portion and the second portions are continuous. 4.0≤DP/HT≤10.0 where HT is a height of each of the flat tubes and DP is a pitch of the flat tubes.

1 .- 8 . (canceled) 
     
     
         9 . An indoor heat exchanger in an indoor unit of an air conditioning apparatus, the indoor heat exchanger comprising:
 flat tubes that are juxtaposed in a vertical direction and that each comprise a flow channel that allows refrigerant to pass through an inner portion thereof, and   heat transfer fins joined to the flat tubes and that each comprise:
 a continuous portion that extends continuously in the vertical direction; and 
 windward portions that are continuous with the continuous portion and are disposed between the flat tubes, wherein 
   4.0≤DP/HT≤10.0 is satisfied, where HT is a height of each of the flat tubes and DP is a pitch of the flat tubes.   
     
     
         10 . An indoor heat exchanger in an indoor unit constituting an air conditioning apparatus together with an outdoor unit that comprises an outdoor heat exchanger, wherein
 the outdoor heat exchanger and the indoor heat exchanger each comprise:
 flat tubes that are juxtaposed in a vertical direction and that each comprise a flow channel that allows refrigerant to pass through an inner portion thereof; and 
 heat transfer fins joined to the flat tubes and that each comprise:
 a continuous portion that extends continuously in the vertical direction; and 
 windward portions that are continuous with the continuous portion and are disposed between the flat tubes, wherein 
 
   a value of DP/HT of the indoor heat exchanger is smaller than a value of DP/HT of the outdoor heat exchanger, where HT is a height of each of the flat tubes and DP is a pitch of the flat tubes.   
     
     
         11 . The indoor heat exchanger according to  claim 9 , wherein the flat tubes each comprise:
 upstream-side flat tubes on an upstream side in an airflow direction, and   downstream-side flat tubes on a downstream side of the upstream-side flat tubes in the airflow direction.   
     
     
         12 . The indoor heat exchanger according to  claim 9 , wherein the continuous portion is disposed on a leeward side of the flat tubes in an airflow direction. 
     
     
         13 . The indoor heat exchanger according to  claim 9 , wherein 0.2≤WL/WF≤0.5 is satisfied, where WF is a length of each of the heat transfer fins in an airflow direction and WL is a length of the continuous portion in the airflow direction. 
     
     
         14 . The indoor heat exchanger according to  claim 9 , wherein
 the heat transfer fins each comprise a cut-and-raised portion, and   a longitudinal direction of the cut-and-raised portion is the vertical direction.   
     
     
         15 . The indoor heat exchanger according to  claim 9 , wherein 4.6≤DP/HT≤8.0 is satisfied. 
     
     
         16 . An air conditioning apparatus comprising:
 an indoor unit comprising the indoor heat exchanger according to  claim 9 , and   an outdoor unit comprising an outdoor heat exchanger.