Heat exchanger and multi-split system having same

Abstract

A heat exchanger ( 100 ) and a multi-split system having the same are provided. The heat exchanger ( 100 ) includes: a manifold ( 1 ) including a main body ( 11 ), an inlet ( 12 ) disposed in a bottom portion of the main body ( 11 ) and a plurality of split-flow ports distributed in a side wall of the main body ( 11 ) along a length direction thereof, in which the main body ( 11 ) includes a plurality of pipes from bottom to top, the pipe located downstream has a smaller flow area than the pipe located upstream in each two adjacent pipes, each pipe has a height no greater than 0.5 m, and a number of the pipes is 2≦N≦3; a header ( 2 ) communicated with the manifold ( 1 ) via a plurality of heat exchange tubes spaced apart from one another along an up and down direction, the header ( 2 ) having an outlet ( 21 ) for discharging a refrigerant.

1 . A heat exchanger, comprising:
 a manifold comprising a main body, an inlet disposed in a bottom portion of the main body, and a plurality of split-flow ports distributed in a side wall of the main body along a length direction of the main body, wherein the main body comprises a plurality of pipes from bottom to top, the pipe located downstream has a smaller flow area than the pipe located upstream in each two adjacent pipes, each pipe has a height no greater than 0.5 m, and a number of the plurality of pipes is 2≦N≦3;   a header communicated with the manifold via a plurality of heat exchange tubes, wherein the plurality of heat exchange tubes are spaced apart from one another along an up and down direction and the header has an outlet for discharging a refrigerant.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein the main body is configured in such a manner that a flow speed of a liquid refrigerant flowing through a transition portion of each two adjacent pipes is substantially equal to a flow speed of the liquid refrigerant at the inlet. 
     
     
         3 . The heat exchanger according to  claim 2 , wherein the flow speed of the liquid refrigerant flowing through the transition portion of each two adjacent pipes and the flow speed of the liquid refrigerant at the inlet both have a value range of 0.4˜0.6 m/s. 
     
     
         4 . The heat exchanger according to  claim 1 , wherein the header is a straight pipe. 
     
     
         5 . The heat exchanger according to  claim 1 , wherein the heat exchange tube is a flat tube. 
     
     
         6 . A multi-split system, comprising a heat exchanger wherein the heat exchanger comprises:
 a manifold comprising a main body, an inlet disposed in a bottom portion of the main body, and a plurality of split-flow ports distributed in a side wall of the main body along a length direction of the main body, wherein the main body comprises a plurality of pipes from bottom to top, the pipe located downstream has a smaller flow area than the pipe located upstream in each two adjacent pipes, each pipe has a height no greater than 0.5 m, and a number of the plurality of pipes is 2≦N≦3;   a header communicated with the manifold via a plurality of heat exchange tubes, wherein the plurality of heat exchange tubes are spaced apart from one another along an up and down direction and the header has an outlet for discharging a refrigerant.   
     
     
         7 . The multi-split system according to  claim 6 , wherein the main body is configured in such a manner that a flow speed of a liquid refrigerant flowing through a transition portion of each two adjacent pipes is substantially equal to a flow speed of the liquid refrigerant at the inlet. 
     
     
         8 . The multi-split system according to  claim 7 , wherein the flow speed of the liquid refrigerant flowing through the transition portion of each two adjacent pipes and the flow speed of the liquid refrigerant at the inlet both have a value range of 0.4˜0.6 m/s. 
     
     
         9 . The multi-split system according to  claim 6 , wherein the header is a straight pipe. 
     
     
         10 . The multi-split system according to  claim 6 , wherein the heat exchange tube is a flat tube.