Heat exchanger

Patent metadata

Field	Value
Publication number	US-10598405-B2
Application number	US-201615752158-A
Country	US
Kind code	B2
Filing date	Aug 11, 2016
Priority date	Aug 28, 2015
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

A heat exchanger according to the present invention comprises a heat exchange portion in which heating medium flow paths, where a heating medium flows through a space between a plurality of plates, and combustion gas flow paths through which a combustion gas combusted in a burner flows are adjacently and alternatingly formed, wherein the heat exchange portion comprises a sensible heat portion, which surrounds the outside of a combustion chamber and comprises an area on one side of the plates, for heating the heating medium using the sensible heat of the combustion gas generated by combustion of the burner, and a latent heat portion, which comprises an area on the other side of the plates, for heating the heating medium using the latent heat of water vapors in the combustion gas which has completed heat exchanging in the sensible heat portion, wherein a connection passage for the heating medium is formed between the sensible heat portion and the latent heat portion, the latent heat portion comprises a heating medium inlet through which the heating medium is introduced, and a plurality of latent heat portion heating medium flow paths which are formed between the plurality of plates and communicate with the heating medium inlet in parallel, and wherein the sensible heat portion comprises a heating medium outlet through which the heating medium is discharged, and a plurality of sensible heat portion heating medium flow paths which are formed between the plurality of plates and are connected serially between the latent heat portion heating medium flow paths and the heating medium outlet.

First claim

The invention claimed is:

1. A heat exchanger comprising:
a heat exchange portion ( 200 ) in which a heating medium flow path through which a heating medium flows in a space between a plurality of plates and combustion gas flow paths through which a combustion gas combusted in a burner ( 100 ) flows are alternately formed to be adjacent to each other,
wherein the heat exchange portion ( 200 ) is configured with a sensible heat portion ( 200 A) configured to surround an outer side of a combustion chamber (C), configured with an area at one side of a plate, and configured to heat the heating medium using sensible heat of the combustion gas generated by the combustion in the burner ( 100 ); and a latent heat portion ( 200 B) configured with an area at the other side of the plate and configured to heat the heating medium using latent heat of water vapor contained in the combustion gas which underwent heat exchange in the sensible heat portion ( 200 A),
a connection passage for the heating medium is formed between the sensible heat portion ( 200 A) and the latent heat portion ( 200 B),
the latent heat portion ( 200 B) is configured with a heating medium inlet ( 201 ) into which the heating medium flows, and with a plurality of latent heat portion heating medium flow paths (P 1 ) formed between a plurality of plates and configured to communicate with the heating medium inlet ( 201 ) in parallel thereto, and
the sensible heat portion ( 200 A) is configured with a heating medium outlet ( 202 ) through which the heating medium flows, and with a plurality of sensible heat portion heating medium flow paths (P 3 ) formed between the plurality of plates and connected in series between the plurality of latent heat portion heating medium flow paths (P 1 ) and the heating medium outlet ( 202 ).

2. The heat exchanger of claim 1 , wherein:
a plurality of plates are formed by stacking a plurality of unit plates in each of which a first plate and a second plate are stacked,
the heating medium flow path is formed between the first plate and the second plate of the unit plate, and
the combustion gas flow path is formed between a second plate constituting a unit plate disposed at one side of adjacently stacked unit plates and a first plate of a unit plate disposed at the other side thereof.

3. The heat exchanger of claim 2 , wherein:
the first plate is configured with a first plane portion ( 210 ); a first protrusion ( 220 ) protruding from one side of the first plane portion ( 210 ) to a front side and having a first opening (A 1 ) formed at a center of the first protrusion ( 220 ) to constitute the sensible heat portion ( 200 A); and a second protrusion ( 230 ) protruding from the other side of the first plane portion ( 210 ) to the front side and configured to form the latent heat portion ( 200 B), and
the second plate is configured with a second plane portion ( 250 ); a first recess ( 260 ) recessed at one side of the second plane portion ( 250 ) toward the rear side, configured to form a sensible heat portion heating medium flow path (P 3 ) between the first protrusion ( 220 ) and the first recess ( 260 ), and having a second opening (A 2 ) corresponding to the first opening (A 1 ); and a second recess ( 270 ) recessed at the other side of the second plane portion ( 250 ) toward the rear side and configured to form a latent heat portion heating medium flow path (P 1 ) between the second protrusion ( 230 ) and the second recess ( 270 ).

4. The heat exchanger of claim 3 , wherein, when the first plate and the second plate are stacked, the first plane portion ( 210 ) and the second plane portion ( 250 ) are in contact with each other, and the second protrusion ( 230 ) and the second recess ( 270 ) are configured to be in comb shapes bent in opposite directions.

5. The heat exchanger of claim 3 , wherein:
a plurality of first gap maintaining portions ( 222 ) are formed at the first protrusion ( 220 ) to protrude toward the combustion gas flow path, and
a plurality of second gap maintaining portions ( 262 ) are formed at the first recess ( 260 ) at positions corresponding to the plurality of first gap maintaining portions ( 222 ) to protrude toward the combustion gas flow path.

6. The heat exchanger of claim 5 , wherein a protruding end of each of the plurality of first gap maintaining portions ( 222 ) and a protruding end of each of the plurality of second gap maintaining portions ( 262 ) are formed to be in contact with each other.

7. The heat exchanger of claim 1 , wherein:
a sensible heat portion combustion gas flow path (P 4 ) is provided between the sensible heat portion heating medium flow paths (P 3 ), and
a latent heat portion combustion gas flow path (P 2 ) communicating with the sensible heat portion combustion gas flow path (P 4 ) is provided between the latent heat portion heating medium flow paths (P 1 ).

8. The heat exchanger of claim 1 , wherein:
through-holes (H 1 ) and (H 5 ) provided at one side of the latent heat portion ( 200 B) and through-holes (H 2 ) and (H 6 ) provided at the other side, which communicate with the latent heat portion heating medium flow paths (P 1 ), are diagonally formed at the latent heat portion ( 200 B) to connect the latent heat portion heating medium flow paths (P 1 ) in parallel, and
through-holes (H 3 ) and (H 7 ) provided at one side of the sensible heat portion ( 200 A) and through-holes (H 4 ) and (H 8 ) provided at the other side, which communicate with the sensible heat portion heating medium flow paths (P 3 ), are diagonally formed at the sensible heat portion ( 200 A) to connect the sensible heat portion heating medium flow paths (P 3 ) in series.

9. The heat exchanger of claim 8 , wherein:
a heating medium flowing into the sensible heat portion heating medium flow path (P 3 ) through the through-holes (H 3 ) and (H 7 ) provided at the one side branches off in both directions and flows toward the through-holes (H 4 ) and (H 8 ) formed at the other side in a diagonal direction, and
the heating medium flowing into the sensible heat portion heating medium flow path (P 3 ) through the through-holes (H 4 ) and (H 8 ) branches off in both directions and flows toward the through-holes (H 3 ) and (H 7 ) formed at the one side in the diagonal direction.

10. The heat exchanger of claim 9 , wherein:
first blocked portions (H 3 ′) and (H 7 ′) configured to guide the heating medium, which flows into the sensible heat portion heating medium flow path (P 3 ) through the through-holes (H 3 ) and (H 7 ) provided at the one side, to flow toward the through-holes (H 4 ) and (H 8 ) formed at the other side in the diagonal direction, and
second blocked portions (H 4 ′) and (H 8 ′) configured to guide the heating medium, which flows into the sensible heat portion heating medium flow path (P 3 ) through the through-holes (H 4 ) and (H 8 ) provided at the other side, to flow toward the through-holes (H 3 ) and (H 7 ) formed at the one side in the diagonal direction are formed at the sensible heat portion ( 200 A).

11. The heat exchanger of claim 8 , wherein:
first flanges (H 3 - 1 ) and (H 4 - 2 ) are respectively formed at the through-holes (H 3 ) and (H 4 ) to protrude toward the combustion gas flow path, and
second flanges (H 7 - 1 ) and (H 8 - 1 ) are respectively formed at the through-holes (H 7 ) and (H 8 ) to protrude toward the combustion gas flow path and are in contact with ends of the first flanges (H 3 - 1 ) and (H 4 - 2 ).

12. The heat exchanger of claim 1 , wherein:
the latent heat portion ( 200 B) is divided into a first latent heat portion ( 200 B- 1 ) and a second latent heat portion ( 200 B- 2 ) on both sides of a heating mediu

Assignees

• Kyungdong Navien Co Ltd

Inventors

• Jeong Inchul

Classifications

• F28D9/00

  Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall {(F28F3/083, F28F3/086 take precedence)} · CPC title

• F28D9/005

  the plates having openings therein for both heat-exchange media · CPC title

• F24H9/0015

  in water channels · CPC title

• F24H1/34 Primary

  with water chamber arranged adjacent to the combustion chamber or chambers, e.g. above or at side · CPC title

• F24H8/00

  Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation · CPC title