Heat exchanger and air-conditioning apparatus

Abstract

A heat exchanger includes a plurality of heat transfer tubes, an outer pipe having a plurality of connection parts to each of which a corresponding one of the plurality of heat transfer tubes is connected, an inner pipe having a plurality of first orifices, and a first partition having a first through-hole, the first partition separating an inside of the outer pipe into a main space and a first space. The main space is a space with which the plurality of first orifices and the plurality of connection parts communicate. The first space communicates with none of the plurality of first orifices and the plurality of connection parts and is a space with which an opening provided at one end of the inner pipe communicates, the one end being a first end.

1 . A heat exchanger comprising:
 a plurality of heat transfer tubes;   an outer pipe having a plurality of connection parts that are arranged at intervals in a longitudinal direction and to each of which a corresponding one of the plurality of heat transfer tubes is connected;   an inner pipe provided inside the outer pipe and having a plurality of first orifices at a periphery; and   a first partition having a first through-hole in which the inner pipe is fitted, the first partition separating an inside of the outer pipe into a main space and a first space,   wherein the main space is a space with which the plurality of first orifices and the plurality of connection parts communicate,   wherein the first space communicates with none of the plurality of first orifices and the plurality of connection parts and is a space with which an opening provided at one end of the inner pipe communicates, the one end being a first end, and   wherein refrigerant supplied into the first space flows into an inside of the inner pipe, the plurality of first orifices, the main space, the plurality of connection parts, and then the plurality of heat transfer tubes.   
     
     
         2 . The heat exchanger of  claim 1 , further comprising:
 a second partition having a second through-hole in which the inner pipe is fitted, the second partition separating the inside of the outer pipe into the main space and a second space,   wherein the second space communicates with none of the plurality of first orifices and the plurality of connection parts and is a space with which an opening provided at an other end of the inner pipe communicates, the other end being a second end located opposite the first end.   
     
     
         3 . The heat exchanger of  claim 2 ,
 wherein, letting a length of the first space in the longitudinal direction be a length L1 and a length of the second space in the longitudinal direction be a length L2,
 the length L1 is greater than the length L2. 
   
     
     
         4 . The heat exchanger of  claim 2 , further comprising:
 an intermediate partition provided between the first partition and the second partition and separating the main space into a plurality of main-space areas.   
     
     
         5 . The heat exchanger of  claim 4 ,
 wherein the intermediate partition has at least one intermediate-partition orifice that allows adjacent ones of the main-space areas to communicate with each other.   
     
     
         6 . The heat exchanger of  claim 2 ,
 wherein the second partition has at least one second orifice that allows the main space and the second space to communicate with each other.   
     
     
         7 . The heat exchanger of  claim 6 ,
 wherein, letting
 an opening area of one of the plurality of first orifices be an opening area S1 and 
 a sum total of opening areas of all of the second orifices be an opening area S2, 
 the opening area S2 is greater than the opening area S1. 
   
     
     
         8 . The heat exchanger of  claim 2 ,
 wherein a refrigerant portion supplied into the first space and a refrigerant portion supplied into the second space flow into an inside of the inner pipe, the plurality of first orifices, the main space, the plurality of connection parts, and then the plurality of heat transfer tubes.   
     
     
         9 . The heat exchanger of  claim 2 ,
 wherein the first end of the inner pipe projects into the first space, and   wherein the second end of the inner pipe projects into the second space.   
     
     
         10 . The heat exchanger of  claim 9 ,
 wherein, letting
 a length by which the inner pipe projects into the first space be a projection length t1 and 
 a length by which the inner pipe projects into the second space be a projection length t2, 
 the projection length t1 is smaller than the projection length t2. 
   
     
     
         11 . The heat exchanger of  claim 2 ,
 wherein the second end of the inner pipe is located in the second through-hole of the second partition.   
     
     
         12 . The heat exchanger of  claim 1 ,
 wherein the first end of the inner pipe is located in the first through-hole of the first partition.   
     
     
         13 . An air-conditioning apparatus comprising:
 the heat exchanger of  claim 1 .