Heat exchanger for low temperatures

Abstract

Heat exchanger for low temperatures. The heat exchanger comprises a body, a tube pack fitted inside the body for circulating a heat-transfer medium in the heat exchanger, connections for leading the heat-transfer medium to the tube pack, and from the tube pack, and connections for leading the heat-transfer medium into the body and out of the body. According to the invention, the heat exchanger's body is manufactured from planar profile sheet. An opening is fitted to at least one long side of the body, and is dimensioned to be large enough for the tube pack forming at least one circuit of the heat exchanger to be fitted inside the body through the opening, so that the tube pack can be easily lifted out from inside the body for the replacement of individual tubes or tube rows. A cover is arranged to cover the opening.

1 . A heat exchanger for low temperatures comprising:
 a body   a tube pack fitted inside the body for circulating a first heat-exchange medium in the heat exchanger, connections to lead the heat-transfer medium to the tube pack and from the tube pack,   an opening arranged in at least one long side of the body, which is dimensioned to be large enough that the tube pack forming at least one circuit of the heat exchanger can be fitted inside the body through the opening,   a cover arranged to close the opening, and   a connection for leading the heat-transfer medium inside the body,   
       wherein,
 the body of the heat exchanger is manufactured from planar profile sheet, 
 at least the body is manufactured from plastic material, and 
 the heat exchanger further comprises a connection for leading the heat-transfer medium from the body. 
 
     
     
         2 . The heat exchanger according to  claim 1 ,
 wherein the tube pack is formed of tube profiles, which are made from plastic material.   
     
     
         3 . The heat exchanger according to  claim 1 , wherein the body and tube profiles are made from polyolefins, such as polyethylene or polypropylene or a combination of these. 
     
     
         4 . The heat exchanger according to  claim 1 , wherein the cover is openable. 
     
     
         5 . The heat exchanger according to  claim 1 , wherein the body of the heat exchanger is made from planar cavity-profile sheet. 
     
     
         6 . The heat exchanger according to  claim 5 , wherein the cavities of the cavity-profile sheet are filled at least partly with a filler, for example, a thermally insulating substance or a substance that is heavier than water. 
     
     
         7 . The heat exchanger according to  claim 1 , wherein there are protrusions on the surface of the profiles of the tubes of at least one tube pack. 
     
     
         8 . The heat exchanger according to  claim 1 , wherein the inner surface of the tubes of the tube pack is smooth. 
     
     
         9 . The heat exchanger according to  claim 1 , wherein at least the inner surface of the tubes of the tube pack is surfaced or mixed with a substance that prevents dirtying. 
     
     
         10 . The heat exchanger according to  claim 1 , further comprising a longitudinal stiffener fitted to at least one long side of the body. 
     
     
         11 . The heat exchanger according to  claim 1 , wherein at least one tube pack of the heat exchanger comprises parallel tube rows consisting of at least two elongated tubes arranged on top of each other, in which the tubes on top of each other are connected alternately at their ends in order to form a liquid channel. 
     
     
         12 . The heat exchanger according to  claim 11 , wherein the parallel tube rows are connected to two manifolds, through which the liquid circulation of the tube rows is arranged. 
     
     
         13 . The heat exchanger according to  claim 11 , wherein manifolds are situated at both ends of the tube pack and the parallel tube rows are connected alternately to the manifolds at different ends. 
     
     
         14 . The heat exchanger according to  claim 1 , wherein the body comprises a bottom plate, which is wider in at least one direction than the casing formed on top of the bottom plates of the body. 
     
     
         15 . The heat exchanger according to  claim 1 , wherein the heat exchanger is manufactured from a weldable polymer material.