Refrigerant distributing device and heat exchanger

Abstract

A refrigerant-distributing device and a heat exchanger comprising the refrigerant-distributing device are provided. The refrigerant-distributing device comprises a distributing tube ( 1 ) defining a first end and a second end in a length direction thereof and a plurality of nozzles ( 2 ) disposed on the distributing tube ( 1 ) along the length direction of the distributing tube, each nozzle having a predetermined length and being formed with a through-hole ( 21 ) communicating an interior of the distributing tube and an exterior of the distributing tube. By provision of the nozzles, the flow resistance is increased, and the refrigerant-flow rate is more uniform along the length direction of the distrusting tube. In addition, the refrigerant can be ejected along the radial direction, the axial direction, the circumferential direction, and other directions so that the uniformity of the refrigerant in the space outside the distributing tube is improved.

1 . A refrigerant-distributing device comprising:
 a distributing tube defining a first end and a second end in a substantially length direction thereof; and   a plurality of nozzles disposed on the distributing tube along the length direction of the distributing tube, wherein each of the nozzles defines a predetermined length and is formed with a through-hole communicating an interior of the distributing tube and an exterior of the distributing tube.   
     
     
         2 . The refrigerant-distributing device according to  claim 1 , wherein the nozzles are arranged in a plurality of rows in a substantially circumferential direction of the distributing tube and the nozzles in each of the rows are arranged substantially spirally. 
     
     
         3 . The refrigerant-distributing device according to  claim 1 , wherein the through-hole is substantially circular and passes through inner and outer end surfaces of the nozzle and a length of the through-hole is about 0.125-about 250 times as large as a hydraulic diameter of the through-hole. 
     
     
         4 . The refrigerant-distributing device according to  claim 1 , wherein the through-hole passes through inner and outer end surfaces of the nozzle and a substantially axial direction of the through-hole is inclined relative to a substantially axial direction of the nozzle. 
     
     
         5 . The refrigerant-distributing device according to  claim 1 , wherein the through-hole defines either of a substantially rectangular and cross-shaped cross-section. 
     
     
         6 . The refrigerant-distributing device according to  claim 1 , wherein the through-hole defines a first through-hole segment extending in a substantially radial direction of the nozzle and a second through-hole segment extending in a substantially axial direction of the nozzle an inner end of the second through-hole segment is communicated with the interior of the distributing tube, an outer end of the second through-hole segment is closed and the first through-hole segment communicates the second through-hole segment with the exterior of the distributing tube. 
     
     
         7 . The refrigerant-distributing device according to  claim 6 , wherein a plurality of the first through-hole segments are formed and arranged in a substantially circumferential direction of the second through-hole segment. 
     
     
         8 . The refrigerant-distributing device according to  claim 1 , wherein the through-hole defines a first through-hole segment and a second through-hole segment extending in a substantially axial direction of the nozzle an inner end of the second through-hole segment is communicated with the interior of the distributing tube, an outer end of the second through-hole segment is closed the first through-hole segment communicates the second through-hole segment with the exterior of the distributing tube, and a substantially axial direction of the first through-hole segment is deviated from a substantially radial direction of the nozzle. 
     
     
         9 . The refrigerant-distributing device according to of  claim 1 , wherein an inner end of each of the nozzles is extended into the interior of the distributing tube by a predetermined length. 
     
     
         10 . The refrigerant-distributing device according to  claim 9 , wherein the inner end of the nozzle is formed with a bent portion. 
     
     
         11 . The refrigerant-distributing device according to  claim 1 , wherein an inner end of each of the nozzles is substantially flush with either of an inner wall surface and an outer wall surface of the distributing tube. 
     
     
         12 . The refrigerant-distributing device according to  claim 1 , wherein the through-hole passes through inner and outer end surfaces of the nozzle a substantially axial direction of the through-hole is substantially parallel with a substantially axial direction of the nozzle, the distributing tube defines a substantially circular cross-section, a ratio H/D of a length H of the through-hole to a hydraulic diameter D of the distributing tube is in a range of about 0.027 to about 25, and a ratio H/L of the length H of the through-hole to a length L of the distributing tube is in a range of about 3.3×10 −4  to about 0.125. 
     
     
         13 . The refrigerant-distributing device according to  claim 1 , wherein a sum of cross-sectional areas of the through-holes of the nozzles is about 0.01% to about 40% of a substantially circumferential-surface area of the distributing tube. 
     
     
         14 . A heat exchanger comprising:
 an inlet header;   an outlet header;   a plurality of heat-exchange tubes each of which defines two ends connected with the inlet header and the outlet header, respectively, to communicate the inlet header and the outlet header;   a plurality of fins disposed between adjacent heat-exchange tubes, respectively; and   a refrigerant-distributing device disposed in the inlet header and including:
 a distributing tube defining a first end and a second end in a substantially length direction thereof; and 
 a plurality of nozzles disposed on the distributing tube along the length direction the distributing tube, wherein each of the nozzles defines a predetermined length and is formed with a through-hole communicating an interior of the distributing tube and an exterior of the distributing tube. 
   
     
     
         15 . The heat exchanger according to  claim 14 , wherein the nozzles are arranged in a plurality of rows in a substantially circumferential direction of the distributing tube and the nozzles in each of the rows are arranged substantially spirally. 
     
     
         16 . The heat exchanger according to  claim 14 , wherein the through-hole is a substantially circular and passes through inner and outer end surfaces of the nozzle and a length of the through-hole is about 0.125-about 250 times as large as a hydraulic diameter of the through-hole. 
     
     
         17 . The heat exchanger according to  claim 14 , wherein the through-hole passes through inner and outer end surfaces of the nozzle and a substantially axial direction of the through-hole is inclined relative to a substantially axial direction of the nozzle. 
     
     
         18 . The heat exchanger according to  claim 14 , wherein the through-hole defines either of a rectangular and cross-shaped cross-section. 
     
     
         19 . The heat exchanger according to  claim 14 , wherein the through-hole defines a first through-hole segment extending in a substantially radial direction of the nozzle and a second through-hole segment extending in a substantially axial direction of the nozzle an inner end of the second through-hole segment is communicated with the interior of the distributing tube, an outer end of the second through-hole segment is closed, and the first through-hole segment communicates the second through-hole segment with the exterior of the distributing tube. 
     
     
         20 . The heat exchanger according to  claim 19 , wherein a plurality of the first through-hole segments are formed and arranged in a substantially circumferential direction of the second through-hole segment.