Heat exchanger

Patent metadata

Field	Value
Publication number	US-10907859-B2
Application number	US-201716072409-A
Country	US
Kind code	B2
Filing date	Feb 3, 2017
Priority date	Feb 5, 2016
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

The present subject matter includes: a heat exchange part having heating medium channels, through which heating medium flows, and combustion gas channels, through which combustion gas burned in a burner flows, adjacently disposed in alternation in the spaces between the plurality of plates; a first welding part in which the outer edges of a pair of plates forming the heating medium channel are welded together; a second welding part in which the plates forming the combustion gas channel, between the plates forming the heating medium channel, are welded to the outer edges of the plates forming the heating medium channel to form; and a guide part for guiding the welding material molten solution of the first welding part into moving to the second welding part.

First claim

The invention claimed is:

1. A heat exchanger comprising:
a plurality of plates; and
a heat exchange part in which a heating medium channel (P 1 ), through which a heating medium flows, and a combustion gas channel (P 2 ), through which a combustion gas combusted in a burner flows, are alternately formed adjacent to each other in a space between the plurality of plates,
wherein edges of a pair of plates forming the heating medium channel (P 1 ) among the plurality of plates are weld-coupled to form a first welding part (W 1 ),
edges of a pair of plates forming the combustion gas channel (P 2 ) among the plurality of plates are weld-coupled to form a second welding part (W 2 ), the pair of plates forming the combustion gas channel (P 2 ) being a first plate and a second plate, and
a guide part is formed to guide a molten solution of a welding material of the first welding part (W 1 ) to be movable to the second welding part (W 2 ),
wherein the guide part includes:
a convex portion ( 132 ) convexly protruding outward from an edge of the first plate, which is disposed at one side and forms the heating medium channel (P 1 ); and
a concave portion ( 162 ) recessed inward from an edge of the second plate, which is disposed at the other side and forms the heating medium channel (P 1 ), partially overlapping with the convex portion ( 132 ), and forming a gap to allow the molten solution of the welding material to be movable,
wherein a plurality of convex portions ( 132 ) are formed along the edge of the first plate at predetermined intervals, and a plurality of concave portions ( 162 ) are formed along the edge of the second plate at predetermined intervals.

2. The heat exchanger of claim 1 , wherein:
the plurality of plates are formed by stacking a plurality of unit plates, wherein a first plate and a second plate are stacked in each of the plurality of unit plates,
the heating medium channel (P 1 ) is formed between the first plate and the second plate,
the combustion gas channel (P 2 ) is formed between a second plate of a unit plate disposed at one side of adjacently disposed unit plates, and a first plate of a unit plate disposed at the other side of the adjacently disposed unit plates, and
the welding material is interposed between the first plate and the second plate which form the heating medium channel (P 1 ).

3. The heat exchanger of claim 1 , wherein:
the plurality of plates are formed by stacking a plurality of unit plates, wherein a first plate and a second plate are stacked in each of the plurality of unit plates,
a first flat surface ( 110 ) having a first opening (A 1 ) formed at a central portion thereof, a protruding portion ( 120 ) formed to protrude from the first flat surface ( 110 ) to a front side and having sections being communicated in a circumferential direction, and a first flange ( 130 ) extending from an edge of the first flat surface ( 110 ) to a rear side are formed on the first plate,
a second flat surface ( 140 ) having a second opening (A 2 ) formed at a central portion thereof to correspond to the first opening (A 1 ) in a front-rear direction and configured to be brought into contact with the first flat surface ( 110 ), a recessed portion ( 150 ) formed to protrude from the second flat surface ( 140 ) to a rear side, having sections being communicated in a circumferential direction, and configured to form the heating medium channel (P 1 ) between the protruding portion ( 120 ) and the recessed portion ( 150 ), and a second flange ( 160 ) extending from an edge of the second flat surface ( 140 ) to the rear side and configured to be coupled to the first flange ( 130 ) of a unit plate, which is disposed next to the second plate, are formed on the second plate, and
the guide part is formed at an edge of each of the first flange ( 130 ) and the second flange ( 160 ).

4. The heat exchanger of claim 3 , wherein:
the protruding portion ( 120 ) is configured with a first protruding piece ( 120 a ) and a second protruding piece ( 120 b ), which are alternately disposed along a circumferential direction and have different heights in the front-rear direction, and
the recessed portion ( 150 ) is configured with a first recessed piece ( 150 a ) and a second recessed piece ( 150 b ), which are alternately disposed along the circumferential direction and have different heights in the front-rear direction.

5. The heat exchanger of claim 3 , wherein:
a plurality of protrusions ( 121 ) protruding toward the heating medium channel (P 1 ) are formed at the protruding portion ( 120 ), and
a plurality of protrusions ( 151 ) protruding toward the heating medium channel (P 1 ) and being brought into contact with the plurality of protrusions ( 121 ) are formed at the recessed portion ( 150 ).

6. The heat exchanger of claim 3 , wherein:
a plurality of protrusions ( 122 ) protruding toward the combustion gas channel (P 2 ) are formed at the protruding portion ( 120 ), and
a plurality of protrusions ( 152 ) protruding toward the combustion gas channel (P 2 ) and being brought into contact with the plurality of protrusions ( 122 ) are formed at the recessed portion ( 150 ).

7. The heat exchanger of claim 1 , wherein:
the heat exchange part is configured to surround a combustion chamber (C) provided at a central portion of the heat exchange part, and a plurality of the heat exchange part is provided in a stacked structure, and
each of the heating medium channels (P 1 ) of the plurality of heat exchange parts is formed to direct a flow of the heating medium in one direction, and the heating medium channels (P 1 ) of adjacently disposed heat exchange parts among the plurality of heat exchange parts are formed in series to direct flows of the heating media in opposite directions.

8. The heat exchanger of claim 7 , wherein the heating medium channels (P 1 ) are formed in parallel inside each of the plurality of heat exchange parts.

9. The heat exchanger of claim 7 , wherein:
through-holes (H 1 and H 3 ) at one side and through-holes (H 2 and H 4 ) at the other side for providing a heating medium connection channel to allow the heating medium to flow in one direction between adjacently stacked heat exchange parts,
first blocked portions (H 1 ′ and H 3 ′) for inducing the heating medium flowing into the heating medium channel (P 1 ) through the through-holes (H 1 and H 3 ) at the one side to flow to the through-holes (H 2 and H 4 ) at the other side via a circumference of the combustion chamber (C) in one direction, and
second blocked portions (H 2 ′ and H 4 ′) for inducing the heating medium flowing into the heating medium channel (P 1 ) through the through-holes (H 2 and H 4 ) at the other side to flow to the through-holes (H 1 and H 3 ) at the one side via the circumference of the combustion chamber (C) in an opposite direction are formed at one side of a portion of the heat exchange part.

Assignees

• Kyungdong Navien Co Ltd

Inventors

• Jeong Inchul
• Hwnag Tae Hyun

Classifications

• F24H9/0026 Primary

  in combustion gas channels · CPC title

• B23K2101/14

  Heat exchangers · CPC title

• F28F3/046

  the deformations being linear, e.g. corrugations · CPC title

• F28F2250/104

  with parallel flow · CPC title

• F24H1/32

  with vertical sections arranged side by side · CPC title