Heat exchanger

Abstract

A heat exchanger includes a refrigerant condensing part including tubes and fins. A refrigerant is to flow in the tubes to exchange heat between the refrigerant and an external gas to flow outside the tubes. The fins are connected to the tubes. A gas/liquid separating part is to separate the refrigerant into gas and liquid. A refrigerant supercooling part is to exchange heat between the refrigerant and the external gas. The refrigerant supercooling part includes an inlet and an outlet. The refrigerant is to flow into the refrigerant supercooling part from the inlet. The refrigerant is to flow out of the refrigerant supercooling part from the outlet. The refrigerant flows through the refrigerant condensing part, the gas/liquid separating part, and the refrigerant supercooling part in this order. The external gas flows around the refrigerant supercooling part and then flows around the refrigerant condensing part.

1 . A heat exchanger comprising:
 a refrigerant condensing part comprising:
 tubes in which a refrigerant is to flow to exchange heat between the refrigerant and an external gas to flow outside the tubes; and 
 fins connected to the tubes; 
   a gas/liquid separating part to separate the refrigerant into gas and liquid; and   a refrigerant supercooling part to exchange heat between the refrigerant and the external gas, the refrigerant supercooling part comprising:
 a supercooling part inlet from which the refrigerant is to flow into the refrigerant supercooling part; and 
 an outlet from which the refrigerant is to flow out of the refrigerant supercooling part, 
   wherein the heat exchanger is so constructed that the refrigerant flows through the refrigerant condensing part, the gas/liquid separating part, and the refrigerant supercooling part in this order, and   wherein the heat exchanger is so constructed that the external gas flows around the refrigerant supercooling part and then flows around the refrigerant condensing part.   
     
     
         2 . The heat exchanger according to  claim 1 ,
 wherein the refrigerant condensing part includes a condensing part inlet from which the refrigerant is to flow into the tubes,   wherein an overheating region is disposed around the condensing part inlet of the refrigerant condensing part, and a supercooling region is disposed around the outlet of the refrigerant supercooling part, and   wherein the heat exchanger is so constructed that the external gas flows through the supercooling region and then, at least part of the external gas flows through the overheating region.   
     
     
         3 . The heat exchanger according to  claim 1 ,
 wherein the refrigerant condensing part includes a branching channel to branch into a first channel connected to the gas/liquid separating part and a second channel from which the refrigerant is to flow out of the refrigerant condensing part.   
     
     
         4 . The heat exchanger according to  claim 2 ,
 wherein the refrigerant condensing part includes a branching channel to branch into a first channel connected to the gas/liquid separating part and a second channel from which the refrigerant is to flow out of the refrigerant condensing part.