Heat exchanger

Abstract

Provided is a heat exchanger. The heat exchanger includes a plurality of refrigerant tubes through which a refrigerant flows, a header including a tube connection part coupled to the plurality of refrigerant tubes and a refrigerant inflow part, a first pipe provided in the header to define a first flow space for the refrigerant, a second pipe surrounding the outside of the first pipe to define a second flow space for the refrigerant, and a communication hole defined in the first or second pipe to allow the refrigerant to pass therethrough.

What is claimed is: 
     
         1 . A heat exchanger comprising:
 a plurality of refrigerant tubes through which a refrigerant flows;   a header comprising a tube connection part coupled to the plurality of refrigerant tubes and a refrigerant inflow part;   a first pipe provided within the header to define a first flow space for the refrigerant;   a second pipe surrounding the outside of the first pipe to define a second flow space for the refrigerant; and   at least one communication hole defined in the first or second pipe to allow the refrigerant to pass through the first or second pipe.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein the communication hole comprises a first communication hole defined in the first pipe to pass the refrigerant within the first flow space of the first pipe into the second flow space of the second pipe. 
     
     
         3 . The heat exchanger according to  claim 2 , wherein the first communication hole are provided in plurality and are spaced apart from each other in a longitudinal direction of the first pipe. 
     
     
         4 . The heat exchanger according to  claim 3 , wherein the communication hole comprises a second communication hole defined in the second pipe to pass the refrigerant within the second flow space of the second pipe into an inner space of the header. 
     
     
         5 . The heat exchanger according to  claim 4 , wherein the communication hole are provided in plurality and are spaced apart from each other in a longitudinal direction of the second pipe. 
     
     
         6 . The heat exchanger according to  claim 5 , wherein the first and second communication holes are defined in directions different from each other with respect to a center of the first or second pipe. 
     
     
         7 . The heat exchanger according to  claim 6 , wherein a first virtual line extending from a center of the first or second pipe to the first communication hole extends in a direction opposite to a second virtual line extending from the center of the first or second pipe to the second communication hole. 
     
     
         8 . The heat exchanger according to  claim 6 , wherein a first virtual line extending from a center of the first or second pipe to the first communication hole extends in a direction that is closer to the refrigerant tube than a second virtual line extending from the center of the first or second pipe to the second communication hole. 
     
     
         9 . The heat exchanger according to  claim 7 , wherein a third virtual line extending from the center of the first or second pipe to the refrigerant tube crosses the first or second virtual line. 
     
     
         10 . The heat exchanger according to  claim 9 , wherein the third virtual line perpendicularly crosses the first or second virtual line. 
     
     
         11 . The heat exchanger according to  claim 5 , wherein the header comprises a horizontal type header extending in a horizontal direction, and
 the first and second communication holes are defined on a same virtual vertical line that is perpendicular to the horizontal direction of the horizontal type header.   
     
     
         12 . The heat exchanger according to  claim 11 , wherein a distance between the first communication hole and an end of the first pipe is the same distance as that between the corresponding second communication hole and an end of the second pipe. 
     
     
         13 . The heat exchanger according to  claim 5 , wherein the header comprises a horizontal type header extending in a horizontal direction, and
 a virtual vertical line that is perpendicular to the horizontal direction of the horizontal type header that passes through the first communication hole does not pass through the second communication hole.   
     
     
         14 . The heat exchanger according to  claim 1 , wherein a pipe connection part extending from the refrigerant inflow part and coupled to an end of the first pipe is provided within the header. 
     
     
         15 . The heat exchanger according to  claim 14 , wherein at least a portion of the pipe connection part is rounded. 
     
     
         16 . A heat exchanger comprising:
 a plurality of refrigerant tubes through which a refrigerant flows;   a header to which the plurality of refrigerant tubes are coupled, the header defining a flow space for the refrigerant;   a first pipe provided within the header to define a first passage for the refrigerant, the first pipe having a first communication hole through which the refrigerant passes; and   a second pipe accommodating the first pipe to define a second passage for the refrigerant, the second pipe having a second communication hole through which the refrigerant passes,   wherein a flow direction of the refrigerant discharged through the first communication hole and a flow direction of the refrigerant discharged through the second communication hole are different from each other with respect to the refrigerant tube.   
     
     
         17 . The heat exchanger according to  claim 16 , wherein the first and second communication holes are defined in the respective first and second pipes so that the flow directions of the refrigerant discharged through the first and second communication holes are opposite to each other. 
     
     
         18 . The heat exchanger according to  claim 17 , wherein the flow direction of the refrigerant discharged through the first communication hole is closer to the refrigerant tube than the flow direction of the refrigerant discharged through the second communication hole. 
     
     
         19 . The heat exchanger according to  claim 16 , wherein the communication hole is defined in the first pipe with respect to the second pipe so that the refrigerant discharged through the first communication hole divides to flow into the second passage. 
     
     
         20 . The heat exchanger according to  claim 16 , wherein the second communication hole is defined in the second pipe with respect to the header so that the refrigerant discharged through the second communication hole divides to flow into a flow space of the header.