To provide heat exchanger elements which allow the creation of Enthalpy exchangers whereby the efficiency of sensible energy exchange and latent energy exchange can he varied and controlled and especially improved, a method for the production of heat exchanger elements is provided including a) producing a plate element with defined outer dimensions and corrugations in the area within a border, b) perforating the plate in predefined areas and in predefined dimensions, c) filling the perforations with a polymer with latent energy recovery capability and d) curing the polymer.

A method for joining a first metal part (11) with a second metal part (12), the metal parts (11,12) having a solidus temperature above 1100 QC. The method comprises: applying a melting depressant composition (14) on a surface (15) of the first metal part (11), the melting depressant composition (14) comprising a melting depressant component that comprises at least 25 wt % boron and silicon for decreasing a melting temperature of the first metal part (11); bringing (202) the second metal part (12) into contact with the melting depressant composition (14) at a contact point (16) on said surface (15); heating the first and second metal parts (11,12) to a temperature above 1100 QC; and allowing a melted metal layer (210) of the first metal component (11) to solidify, such that a joint (25) is obtained at the contact point (16). The melting depressant composition and related products are also described.

A heat exchanger comprising a heat exchange unit in which heat is exchanged between combustion gas caused by a burner for combusting a mixture and first/second heating mediums, and heating medium flow channels through which the first/second heating mediums flow and a combustion gas flow channel through which the combustion gas flows are alternately formed adjacent to each other in spaces between a plurality of plates and a combustion gas discharge unit through which the combustion gas having passed through the heat exchange unit is discharged is provided.

The present invention relates to a method for providing a braze alloy layered product comprising the following steps: applying at least one silicon source and at least one boron source on at least a part of a surface of a substrate, wherein the at least one boron source and the at least one silicon source are oxygen free except for inevitable amounts of contaminating oxygen, and wherein the substrate comprises a parent material having a solidus temperature above 1100 C.; heating the substrate having the applied boron source and the applied silicon source to a temperature lower than the solidus temperature of the parent material of the substrate; and cooling the substrate having the applied boron source and the applied silicon source, and obtaining the braze alloy layered product. The present invention relates further to a braze alloy layered product, a method for providing a brazed product, a method for providing a coated product, and uses of the braze alloy layered product.

A plate for a heat exchanger includes a substantially planar body having a first end, a second end opposing the first end, a fluid surface, and an outer surface. A first cup extends from the outer surface of the body adjacent the first end of the body. A second cup extends from the outer surface of the body and is spaced from the second end of the body.

A heat exchanger includes a plurality of plates of a first and a second type. The plates of the second type have a shape which is substantially mirrored to the shape of the plates of the first type. The plurality of plates of the first and the second type are arranged in a stack on top of each other, with plates of the first and second type arranged alternatingly, with corresponding ones of dimples and ridges of adjacent plates come and stay into direct contact with each other, so that corresponding first and/or second surfaces of adjacent plates abut each other and so that flow channels for the first and second media are formed between the surfaces.

A round plate heat exchanger of the present invention has a heat exchange part in which heat medium flow paths and combustion gas flow paths are formed so as to be alternatingly adjacent to each other in a space among a plurality of plates, wherein the plurality of plates forming the heat exchange part are formed by stacking a plurality of unit plates comprising a first plate and a second plate stacked therein, the plurality of heat medium flow paths are formed to be spaced from each other between the first plate and the second plate of the unit plate, a heat medium connection flow path is formed in a part of the region of the heat medium flow paths located adjacent to each other, and the combustion gas flow path is formed between the second plate of the unit plate, located at one side of the unit plate, among the unit plates, which are stacked adjacent to each other, and the first plate of the unit plate, located at the other side of the unit plate.

Disclosed herein is a plate-type vacuum heat transfer apparatus for a television. The apparatus includes a first plate and a second plate sealed to define an internal space in a vacuum state, a mesh member disposed between the first and second plates, and a heat transfer medium supplied to a portion of the internal space. Each of the first and second plates includes an edge protruding to a hexagonal honeycomb structure formed such that a vertex thereof is located in a direction of gravity. Hexagonal honeycomb structures of the first and second plates overlap at some edges to be offset from each other, thus providing the internal space for allowing communication and a flow passage of the heat transfer medium.

The present invention relates to a heat exchanger enhancing heat exchange efficiency between a heating medium and combustion heat of a burner, the heat exchanger being provided with a heat exchange unit having heating medium flow channels through which a heating medium flows and combustion gas flow channels through which combustion gas combusted in the burner flows to be alternately formed and adjacent to each other in spaces between a plurality of plates, wherein the heat exchange unit comprises: a sensible heat unit which surrounds the outer side of a combustion chamber, is formed of one side area of the plates, and heats the heating medium by using sensible heat of combustion gas generated by the combustion of the burner; and a latent heat unit which is formed of the other side area of the plates, and heats the heating medium by using latent heat of water vapor included in combustion gas that has finished undergoing heat exchange in the sensible heat unit, wherein the heating medium flow channels of the sensible heat unit have guide units formed thereon for inducing the heating medium to flow towards the center of the combustion chamber.

In an inner fin, a plate is made up of a top part, a bottom part, and a wall plate part, and a channel having a concave-shaped cross section and a channel having an inverted concave-shaped cross section are alternately repeated as channels of the gas by a pair of the wall plate parts facing each other. The wall plate part for each of the channels has a shape in which the wall plate part is bent left and right in a serpentine shape and projected and recessed parts thereof are alternately repeated and formed, and the recessed part of the wall plate part is formed with a chevron-shaped part made up of an upward slope part that ranges from a base part to the top part and a downward slope part that passes downward from the top part to a neighboring base part.