Heat exchanger

Abstract

A heat exchanger is provided which may include a first heat exchange tube in a pipe shape, including a first fluid inlet, into which a first fluid may be introduced and flow, and a first fluid outlet, through which the first fluid may be discharged; a second heat exchange tube that passes through the first heat exchange tube, including a second fluid inlet, into which a second fluid may be introduced and flow, and a second fluid outlet, through which the second fluid may be discharged; and a third heat exchange tube that includes a third fluid inlet, into which the second fluid discharged through the second fluid outlet may be introduced and flow, and a third fluid outlet, through which the second fluid may be discharged, the third fluid outlet enclosing an external surface of the first heat exchange tube.

1 . A heat exchanger, comprising:
 a first heat exchange tube in the shape of a pipe, including a first fluid inlet, into which a first fluid is introduced, and a first fluid outlet through which the first fluid is discharged;   a second heat exchange tube that passes through the first heat exchange tube, including a second fluid inlet, into which a second fluid is introduced, and a second fluid outlet, through which the second fluid is discharged; and   a third heat exchange tube including a third fluid inlet, into which the second fluid having been discharged through the second fluid outlet is introduced, and a third fluid outlet, through which the second fluid is discharged, the third fluid tube enclosing an external surface of the first heat exchange tube.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein the first and third heat exchange tubes have concentric axes and have diameters different from each other. 
     
     
         3 . The heat exchanger according to  claim 2 , wherein the first and second heat exchange tubes have concentric axes and have diameters different from each other. 
     
     
         4 . The heat exchanger according to  claim 1 , wherein the second heat exchange tube comprises a straight tube disposed in the first heat exchange tube. 
     
     
         5 . The heat exchanger according to  claim 1 , wherein the second heat exchange tube includes a bent tube disposed in the first heat exchange tube, the bent tube having a shape which is bent at least once. 
     
     
         6 . The heat exchanger according to  claim 1 , wherein the second heat exchange tube includes a curved tube disposed in the first heat exchange tube, the curved tube having a shape including at least one curve at a predetermined curvature. 
     
     
         7 . The heat exchanger according to  claim 1 , wherein the first fluid has a first temperature, and the second fluid has a second temperature, which is lower than the first temperature. 
     
     
         8 . The heat exchanger according to  claim 1 , further comprising:
 a connection tube that connects the second and third heat exchange tubes to each other.   
     
     
         9 . A heater comprising the heat exchanger according to  claim 1 . 
     
     
         10 . A cooler comprising the heat exchanger according to  claim 1 . 
     
     
         11 . An evaporator comprising the heat exchanger according to  claim 1 . 
     
     
         12 . A condenser comprising the heat exchanger according to  claim 1 . 
     
     
         13 . A heat exchanger, comprising:
 a high temperature heat exchange tube including a first fluid inlet, into which a first fluid is introduced, and a first fluid outlet, through which the first fluid is discharged; and   a low temperature heat exchange tube including a first low temperature heat exchange tube portion having a second fluid inlet, into which a second fluid is introduced, and passing through the high temperature heat exchange tube, and a second low temperature heat exchange tube portion that communicates with the first low temperature heat exchange tube portion, encloses an external surface of the high temperature heat exchange tube and has a second fluid outlet, through which the second fluid is discharged.   
     
     
         14 . The heat exchanger according to  claim 13 , wherein the first low temperature heat exchange tube portion includes at least one of a straight tube disposed in the high temperature heat exchange tube, a bent tube disposed in the high temperature heat exchange tube, the bent tube having a shape which is bent at least once, or a curved tube disposed in the high temperature heat exchange tube, the curved tube having a shape including at least one curve curved at a predetermined curvature. 
     
     
         15 . The heat exchanger according to  claim 13 , wherein the first fluid has a first temperature, and the second fluid has a second temperature, which is lower than the first temperature. 
     
     
         16 . The heat exchanger according to  claim 13 , further comprising:
 a connector portion that connects the first low temperature heat exchange tube portion and the second low temperature heat exchange tube portion.   
     
     
         17 . The heat exchanger according to  claim 13 , wherein the first, second, and third low temperature heat exchange tube portions are integrally formed. 
     
     
         18 . A heater comprising the heat exchanger according to  claim 13 . 
     
     
         19 . A cooler comprising the heat exchanger according to  claim 13 . 
     
     
         20 . An evaporator comprising the heat exchanger according to  claim 13 . 
     
     
         21 . A condenser comprising the heat exchanger according to  claim 13 . 
     
     
         22 . A heat exchanger, comprising:
 a first heat exchange tube including a first fluid inlet, into which a first fluid is introduced, and a first fluid outlet, through which the first fluid is discharged;   a second heat exchange tube that passes through the first heat exchange tube and into which a second fluid is introduced, the second heat exchange tube including a second fluid outlet, through which the second fluid is discharged;   a third heat exchange tube into which the second fluid is introduced and which encloses an external surface of the first heat exchange tube and communicates with the second heat exchange tube, including a third fluid outlet, through which the second fluid is discharged; and   a second fluid inlet tube, which is connected to a connector that connects the second and third heat exchange tubes to provide the second and third heat exchange tubes with the second fluid.   
     
     
         23 . The heat exchanger according to  claim 22 , wherein the second heat exchange tube includes one of a straight tube disposed in the first heat exchange tube, a bent tube that is bent at least once disposed in the first heat exchange tube, or a curved tube that is curved at least once at a predetermined curvature disposed in the first heat exchange tube. 
     
     
         24 . The heat exchange according to  claim 22 , wherein the first fluid has a first temperature, and the second fluid has a second temperature, which is lower than the first temperature. 
     
     
         25 . A heater comprising the heat exchanger according to  claim 22 . 
     
     
         26 . A cooler comprising the heat exchanger according to  claim 22 . 
     
     
         27 . An evaporator comprising the heat exchanger according to  claim 22 . 
     
     
         28 . A condenser comprising the heat exchanger according to  claim 22 .