Heat exchanger

Abstract

A heat exchanger ( 100 a ) includes a plurality of tubes ( 4 ), an entrance header ( 1 ) for distributing a refrigerant to the tubes ( 4 ), and an exit header ( 2 ) for collecting the refrigerant from the tubes ( 4 ). The entrance header ( 1 ) includes a circulating conduit ( 10 ) capable of circulating at least part of the refrigerant that has flowed into the entrance header ( 1 ), and the plurality of tubes ( 4 ) are fluidly connected to the outward channel ( 10 a ) of the circulating conduit ( 10 ). The entrance header ( 1 ) also includes an ejector 11 that uses the refrigerant flowing into the entrance header to draw and mix at least part of the refrigerant that has flowed into the entrance header and spray out the mixed refrigerant. The entrance header ( 1 ) can supply refrigerant more uniformly to the tubes ( 4 ) connected to the circulating conduit ( 10 ).

1 . A heat exchanger comprising:
 a plurality of tubes;   an entrance header for distributing a heat exchange medium to the plurality of tubes; and   an exit header for collecting the heat exchange medium from the plurality of tubes,   wherein the entrance header includes:   a circulating conduit that is capable of circulating at least part of the heat exchange medium that has flowed into the entrance header, the plurality of tubes being fluidly connected to at least part of the circulating conduit; and   a pressure difference generating mechanism that sprays the heat exchange medium in an axial direction of the circulating conduit to forcibly circulate at least part of the heat exchange medium that has flowed into the entrance header in the circulating conduit.   
     
     
         2 . The heat exchanger according to  claim 1 ,
 wherein the pressure difference generating mechanism is driven by the heat exchange medium flowing into the entrance header.   
     
     
         3 . The heat exchanger according to  claim 1 ,
 wherein the pressure difference generating mechanism is a mechanism for drawing, mixing, and spraying out at least part of the heat exchange medium that has flowed into the entrance header using the heat exchange medium flowing into the entrance header.   
     
     
         4 . The heat exchanger according to  claim 1 ,
 wherein the entrance header includes a double pipe or multi-layer pipe that constructs at least part of the circulating conduit, the pressure difference generating mechanism is provided at one end of the double pipe or multilayer pipe, and the respective pipes of the double pipe or multilayer pipe are fluidly connected at the other end.   
     
     
         5 . A system comprising:
 a heat exchanger according to  claim 1 ; and   a medium supplying system that supplies the heat exchange medium to the heat exchanger.   
     
     
         6 . A system according to  claim 5 ,
 wherein the medium supplying system includes an apparatus that pressurizes the heat exchange medium collected from the heat exchanger and a condenser that cools the pressurized heat exchange medium.   
     
     
         7 . A heat exchanger comprising:
 a plurality of tubes;   an entrance header for distributing a heat exchange medium to the plurality of tubes; and   an exit header for collecting the heat exchange medium from the plurality of tubes,   wherein the entrance header includes a circulating conduit capable of circulating at least part of the heat exchange medium that has flowed into the entrance header, the plurality of tubes being fluidly connected to at least part of the circulating conduit.   
     
     
         8 . A heat exchanger comprising:
 a plurality of tubes;   an entrance header for distributing a heat exchange medium to the plurality of tubes; and   an exit header for collecting the heat exchange medium from the plurality of tubes,   wherein the entrance header includes:   a circulating conduit capable of circulating at least part of the heat exchange medium that has flowed into the entrance header, the plurality of tubes being fluidly connected to at least part of the circulating conduit; and   an ejector that draws and mixes at least part of the heat exchange medium that has flowed into the entrance header using the heat exchange medium flowing into the entrance header and sprays out the heat exchange medium into the circulating conduit.   
     
     
         9 . A heat exchange system comprising:
 a heat exchanger according to  claim 8 ; and   a medium supplying system that supplies the heat exchange medium to the heat exchanger as an evaporator,   wherein the medium supplying system includes an apparatus that pressurizes the heat exchange medium collected from the evaporator and a condenser that cools the pressurized heat exchange medium.   
     
     
         10 . A header for distributing a heat exchange medium to a plurality of tubes, wherein the header includes a circulating conduit capable of circulating at least part of the heat exchange medium that has flowed into the header, wherein the plurality of tubes are fluidly connected to at least part of the circulating conduit. 
     
     
         11 . The header according to  claim 10 , further comprising a mechanism that uses the heat exchange medium flowing into the header to produce a pressure difference for spraying out the heat exchange medium, which includes at least part of the heat exchange medium that has flowed into the header, in the axial direction of the circulating conduit. 
     
     
         12 . The header according to  claim 10 , further comprising an ejector that uses the heat exchange medium flowing into the header to draw and mix at least part of the heat exchange medium that has flowed into the header and spray out the heat exchange medium into the circulating conduit.