Heat Exchanger

Abstract

A heat exchanger, including at least one flat pipe, each flat pipe is provided with a refrigerant cavity, an inlet, an outlet and two through holes, the inlet and the outlet are located at two ends of the refrigerant cavity, respectively, and both the inlet and the outlet communicate with the refrigerant cavity; the two through holes are respectively located at two ends of the refrigerant cavity, and the two through holes do not communicate with the refrigerant cavity. The flat pipe is provided with the inlet, the outlet and two through holes, when the plurality of flat pipes are matched with liquid collecting pipes (liquid inlet pipes or liquid outlet pipes) of the heat exchanger, different flat pipes can choose to use the inlets or outlets to communicate with the liquid collecting pipes, and the through holes are able to be used to avoid the liquid collecting pipes.

What is claimed is: 
     
         1 . A heat exchanger, comprising at least one flat pipe, each flat pipe is provided with a refrigerant cavity, an inlet, an outlet and two through holes, wherein the inlet and the outlet are located at two ends of the refrigerant cavity respectively, and both the inlet and the outlet communicate with the refrigerant cavity; and the two through holes are respectively located at two ends of the refrigerant cavity, and the two through holes do not communicate with the refrigerant cavity. 
     
     
         2 . The heat exchanger as claimed in  claim 1 , wherein a plurality of flat pipes are provided, the plurality of flat pipes comprise first flat pipes and second flat pipes which are alternately distributed, the heat exchanger further comprises a first liquid inlet pipe, a second liquid inlet pipe, a first liquid outlet pipe and a second liquid outlet pipe, a first inlet of each first flat pipe communicates with the first liquid inlet pipe, a first outlet of the each first flat pipe communicates with the first liquid outlet pipe, a second inlet of each second flat pipe communicates with the second liquid inlet pipe, and a second outlet of the each second flat pipe communicates with the second liquid outlet pipe;
 two through holes of the first flat pipe are a first through hole and second through hole respectively, two through holes of the second flat pipe are a third through hole and a fourth through hole respectively, the first through hole corresponds to the second outlet, the second through hole corresponds to the second inlet, the third through hole is disposed corresponding to the first inlet, the fourth through hole is disposed corresponding to the first outlet, the first through hole communicates with the second liquid outlet pipe, the second through hole communicates with the second liquid inlet pipe, the third through hole communicates with the first liquid inlet pipe, and the fourth through hole communicates with the first liquid outlet pipe.   
     
     
         3 . The heat exchanger as claimed in  claim 2 , wherein the first liquid inlet pipe and the second liquid outlet pipe are located at one end of the each first flat pipe, and the first liquid outlet pipe and the second liquid inlet pipe are located at the other end of the each first flat pipe. 
     
     
         4 . The heat exchanger as claimed in  claim 2 , wherein the first liquid inlet pipe, the second liquid inlet pipe, the first liquid outlet pipe and the second liquid outlet pipe are distributed along a length direction of the first flat pipe; or
 the first liquid inlet pipe and the second liquid outlet pipe are distributed along a width direction of the first flat pipe, and the first liquid outlet pipe and the second liquid inlet pipe are distributed along the width direction of the first flat pipe.   
     
     
         5 . The heat exchanger as claimed in  claim 1 , wherein each flat pipe comprises two heat exchange plates which are connected together in a sealed manner, and the two heat exchange plates are symmetrically disposed relative to a preset symmetry plane. 
     
     
         6 . The heat exchanger as claimed in  claim 5 , wherein each heat exchange plate comprises a plate body, a welding edge disposed at a periphery of the plate body, and a first convex surface and a second convex surface disposed at two ends of the plate body at intervals, and the welding edge, the first convex surface and the second convex surface are all located on a same side of the plate body; an area between plate bodies of the two heat exchange plates forms the refrigerant cavity, welding edges of the two heat exchange plates are welded together, first convex surfaces of the two heat exchange plates are welded together, and second convex surfaces of the two heat exchange plates are welded together; the inlet and the outlet are respectively located at two ends of the plate body, and the two through holes are respectively located on the first convex surface and the second convex surface. 
     
     
         7 . The heat exchanger as claimed in  claim 6 , wherein the inlet, one of the two through holes, the outlet and the other of the two through holes are distributed along a length direction of the heat exchange plate; or,
 the inlet and one of the two through holes are distributed along a width direction of the heat exchange plate, and the outlet and the other of the two through holes are distributed along the width direction of the heat exchange plate.   
     
     
         8 . The heat exchanger as claimed in  claim 2 , wherein the first liquid inlet pipe comprises a plurality of pipe sections which communicate in sequence, one end of each pipe section is connected with the first flat pipe in a sealed manner, and the other end of the each pipe section is connected with the second flat pipe in a sealed manner. 
     
     
         9 . The heat exchanger as claimed in  claim 8 , wherein the each pipe section comprises a pipe body and a first ring body and a second ring body respectively disposed at two ends of the pipe body, the first ring body is welded with an outer wall of the first flat pipe, and the second ring body is welded with an outer wall of the second flat pipe. 
     
     
         10 . The heat exchanger as claimed in  claim 8 , wherein the first liquid inlet pipe, the second liquid inlet pipe, the first liquid outlet pipe and the second liquid outlet pipe have the same structure.