Heat exchanging device and method therefor

Abstract

A heat exchanging device having a first hollow profile configured to conduct a first medium, a second hollow profile configured to conduct a second medium, and where at least a part of the second hollow profile is wound around at least a part of the first hollow profile. A nominal width of the second hollow profile is smaller than a nominal width of the first hollow profile. An outer surface of the first hollow profile comprises a first contact portion, an outer surface of the second hollow profile comprises a second contact portion, and the first contact portion and the second contact portion are coupled by means of a soldered connection.

1 . A heat exchanging device comprising:
 a first hollow profile configured to conduct a first medium;   a second hollow profile configured to conduct a second medium, wherein at least a part of the second hollow profile is wound around at least a part of the first hollow profile;   wherein a nominal width of the second hollow profile is smaller than a nominal width of the first hollow profile; and   wherein an outer surface of the first hollow profile comprises a first contact portion, wherein an outer surface of the second hollow profile comprises a second contact portion, and wherein the first contact portion and the second contact portion are coupled by means of a soldered connection.   
     
     
         2 . The heat exchanging device according to  claim 1 , wherein the outer surface of the second hollow profile comprises an outside portion arranged opposite to the second contact portion, wherein the outside portion and the second contact portion are parallel. 
     
     
         3 . The heat exchanging device according to  claim 1 , wherein a cross section of the second hollow profile has a trapezoid shape, where the second contact portion corresponds to a basis of the trapezoid shape. 
     
     
         4 . The heat exchanging device according to  claim 1 , wherein the first hollow profile comprises a straight portion, wherein the second hollow profile is wound around at least a part of the straight portion. 
     
     
         5 . The heat exchanging device according to  claim 1 , wherein a central axis of the part of the second hollow profile that is wound around the part of the first hollow profile corresponds to a helix having a uniform pitch. 
     
     
         6 . The heat exchanging device according to  claim 1 , wherein a distance between two adjacent windings of the second hollow profile s equal to or larger than 1.5 mm. 
     
     
         7 . The heat exchanging device according to  claim 1 , wherein a distance between two adjacent windings of the second hollow profile is equal to or smaller than 0.3 mm. 
     
     
         8 . The heat exchanging device according to  claim 1 , wherein the first hollow profile comprises stainless steel. 
     
     
         9 . The heat exchanging device according to  claim 1 , wherein the second hollow profile comprises aluminum. 
     
     
         10 . The heat exchanging device according to  claim 1 , wherein the nominal width of the second hollow profile corresponds to a distance between a first inner surface section of the second hollow profile arranged opposite to the second contact portion and a second inner surface section of the second hollow profile arranged opposite to the outside portion. 
     
     
         11 . The heat exchanging device according to  claim 1 , wherein at least a part of the first hollow profile has a circular cross-section. 
     
     
         12 . The heat exchanging device according to  claim 1 , wherein the nominal width of the first hollow profile is substantially 20 mm-120 mm. 
     
     
         13 . The heat exchanging device according to  claim 1 , wherein the nominal width of the second hollow profile is substantially 5 mm-25 mm. 
     
     
         14 . A heat pump comprising the heat exchanging device according to  claim 1 , wherein the heat exchanging device is employed as one of an evaporator or a compressor. 
     
     
         15 . A domestic applicance, comprising a heat pump according to  claim 14 . 
     
     
         16 . A method of operating a heat exchanging device according to  claim 1 , wherein the method comprises the steps of:
 conducting a first medium in a first hollow profile;   conducting a second medium in a second hollow profile, wherein at least a part of the second hollow profile is wound around at least a part of the first hollow profile;   wherein a nominal width of the second hollow profile is smaller than a nominal width of the first hollow profile;   wherein an outer surface of the first hollow profile comprises a first contact portion, wherein an outer surface of the second hollow profile comprises a second contact portion, and wherein the first contact portion and the second contact portion are coupled by means of a soldered connection.   
     
     
         17 . A method of providing a heat exchanging device comprising:
 providing a first hollow profile configured to conduct a first medium;   providing a second hollow profile configured to conduct a second medium, wherein a nominal width of the second hollow profile is smaller than a nominal width of the first hollow profile;   winding at least a part of the second hollow profile around at least a part of the first hollow profile;   providing a soldered connection to couple a first contact portion and a second contact portion, wherein an outer surface of the first hollow profile comprises the first contact portion, and wherein an outer surface of the second hollow profile comprises the second contact portion.