Heat exchanger and method for manufacturing such

Abstract

Heat exchanger comprising at least a heat exchanger space, a burner space and a water conducting channel, wherein the heat exchanger comprises a body having at least one slot and at least one cassette insertable into said at least one slot, said cassette comprising at least part of a water conducting channel.

1 . Heat exchanger comprising at least a heat exchanger space, a burner space and a water conducting channel, wherein the heat exchanger comprises a body having at least one slot and at least one cassette insertable into said at least one slot, said cassette comprising at least part of a water conducting channel. 
     
     
         2 . Heat exchanger according to  claim 1 , wherein the at least one cassette comprises a first wall for engaging a wall of said at least one slot and a labyrinth forming wall extending from said first wall, extending between an inlet side and a outlet side of the cassette. 
     
     
         3 . Heat exchanger according to  claim 2 , wherein the at least one cassette comprises a first wall and the cassette is open at a side opposite the first wall and is preferably machined from a metal element. 
     
     
         4 . Heat exchanger according to  claim 1 , wherein the cassette comprises a labyrinth which at least partly defines a substantially zig-zag flow path through the cassette, between an inlet and an outlet of said cassette. 
     
     
         5 . Heat exchanger according to  claim 1 , comprising a series of such cassettes, wherein the at least one slot and the cassettes are designed such that at least two cassettes can be inserted into said slot, preferably in a side by side relationship. 
     
     
         6 . Heat exchanger according to  claim 1 , wherein the water conducting channel in said cassette extends between an inlet and an outlet and has in the flow direction an increasing cross section. 
     
     
         7 . Heat exchanger according to  claim 1 , wherein the at least one cassette has been inserted into the at least one slot, wherein the part of the water conducting channel in the cassette is closed at least at one side by a wall of the slot. 
     
     
         8 . Heat exchanger according to  claim 1 , wherein a series of cassettes is provided, each insertable into said at least one slot, wherein the cassettes comprise different water conducting channel parts. 
     
     
         9 . Heat exchanger according to  claim 1 , comprising at least two parts made at least partly by extrusion or casting from light metal or light metal alloy and/or plastic, said at least two parts mutually engaging for forming part of the heat exchanging space and/or the water conducting channel, wherein each of said at least two parts comprises part of said heat exchanging space and/or said water conducting channel and wherein the burner space is formed in one of or between said at least two parts, wherein at least one of the parts comprises said at least one slot. 
     
     
         10 . Heat exchanger according to  claim 9 , wherein said at least two parts are connected by an elastic bonding agent, in particular an elastic glue, forming a bond and a seal, wherein at least the water conducting channel of the heat exchanger is pressure resistant. 
     
     
         11 . Heat exchanger according to  claim 1 , wherein two end parts are mounted to the body of the heat exchanger, at opposite sides thereof, wherein the end parts are preferably bonded to the said two parts by elastic bonding agent, preferably an elastic glue, at least partly closing off at least the heat exchanging space and/or the water channel, and/or wherein said end parts are preferably made at least partly by extrusion and wherein the at least one slot is provided in the body and is open to at least one and preferably both end parts. 
     
     
         12 . Series of heat exchangers, each according to  claim 1 , wherein at least two heat exchangers in the series are substantially identical, except for at least one cassette inserted therein. 
     
     
         13 . Heat exchanger comprising at least a heat exchanger space and a water conducting channel, wherein the heat exchanger comprises a body having at least one slot and at least one cassette insertable into said at least one slot, said cassette comprising at least part of a water conducting channel, wherein the at least one slot is enclosed in a wall portion of the heat exchanger, separated from the at least one heat exchanger space. 
     
     
         14 . Heat exchanger according to  claim 13 , wherein the at least one cassette comprises a first wall for engaging a wall of said at least one slot and elements extending from said first wall. 
     
     
         15 . Heat exchanger according to  claim 13 , wherein the at least one cassette comprises a first wall and the cassette is open at a side opposite the first wall. 
     
     
         16 . Heat exchanger according to  claim 13 , wherein the cassette is made using machining. 
     
     
         17 . Heat exchanger according to  claim 13 , wherein the cassette comprises a labyrinth which at least partly defines a substantially zig-zag flow path through the cassette, between an inlet and an outlet of said cassette. 
     
     
         18 . Heat exchanger according to  claim 13 , comprising a series of such cassettes, wherein the at least one slot and the cassettes are designed such that at least two cassettes can be inserted into said slot. 
     
     
         19 . Heat exchanger according to  claim 18 , wherein the cassettes can be inserted into the at least one slot in a side by side relationship. 
     
     
         20 . Heat exchanger according to  claim 13 , wherein the at least one cassette has been inserted into the at least one slot, wherein the part of the water conducting channel in the cassette is closed at least at one side by a wall of the slot. 
     
     
         21 . Heat exchanger according to  claim 13 , wherein a series of cassettes is provided, each insertable into said at least one slot, wherein the cassettes comprise different water conducting channel parts. 
     
     
         22 . Heat exchanger according to  claim 13 , comprising at least two parts made at least partly by extrusion or casting from light metal or light metal alloy and/or plastic, said at least two parts mutually engaging for forming part of the heat exchanging space and/or the water conducting channel, wherein each of said at least two parts comprises part of said heat exchanging space and/or said water conducting channel and wherein the burner space is formed in one of or between said at least two parts, wherein at least one of the parts comprises said at least one slot. 
     
     
         23 . Heat exchanger according to  claim 22 , wherein said at least two parts are connected by an elastic bonding agent forming a bond and a seal, wherein at least the water conducting channel of the heat exchanger is pressure resistant. 
     
     
         24 . Heat exchanger according to  claim 23 , wherein the bonding agent is an elastic glue, forming a bond and a seal. 
     
     
         25 . Heat exchanger according to  claim 13 , wherein two end parts are mounted to the body of the heat exchanger, at opposite sides thereof, wherein the end parts are connected to said two parts, at least partly closing off at least the heat exchanging space and/or the water channel, and/or wherein said end parts are made at least partly by extrusion and wherein the at least one slot is provided in the body and is open to at least one end part. 
     
     
         26 . Heat exchanger according to  claim 25 , wherein the at least one slot is open to both end parts. 
     
     
         27 . Heat exchanger according to  claim 13 , wherein further a burner space is provided, part of or connecting to the heat exchanging space in the heat exchanger, separated from the at least one slot. 
     
     
         28 . Method for manufacturing a heat exchanger or parts thereof, comprising the steps of:
 forming a heat exchanger body provided with at least part of a heat conducting space and a slot extending in a first direction of said body;   forming at least one cassette provided with a water conducting channel part;   inserting the at least one cassette into said at least one slot, forming a water conducting channel through said body, preferably between two opposite ends thereof.   
     
     
         29 . Method according to  claim 28 , wherein the body is formed using one or more extruded or cast elements and wherein the at least one cassette is formed by machining metal, such that a cassette is formed having a first wall and channel defining walls extending from said first wall, forming a labyrinth shaped water channel part, open at a side opposite the first wall, wherein the at least one slot is made such that when the cassette is inserted into said slot, said at least one open side is closed substantially by a wall of the slot. 
     
     
         30 . Method according to  claim 28 , wherein a slot is provided on either side of the heat conducting space, wherein in each slot at least one cassette is provided, water conducting channel parts in the cassettes being interconnected. 
     
     
         31 . Method according to  claim 28 , wherein a further cassette is inserted into the heat conducting space, said further cassette provided with at least one gas flow channel. 
     
     
         32 . Heating apparatus comprising a heat exchanger according to  claim 1 . 
     
     
         33 . Heating apparatus comprising a heat exchanger made with a method according to  claim 28 .