Heat exchanger

Patent metadata

Field	Value
Publication number	US-10746436-B2
Application number	US-201615746671-A
Country	US
Kind code	B2
Filing date	Jul 15, 2016
Priority date	Jul 23, 2015
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

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.

First claim

The invention claimed is:

1. A heat exchanger comprising:
a heat exchange unit ( 200 ) in which heating medium flow channels through which a heating medium flows in a space between a plurality of plates and combustion gas flow channels through which a combustion gas combusted in a burner ( 100 ) flows are alternately formed to be adjacent to each other,
wherein the heat exchange unit ( 200 ) is configured with a sensible heat unit ( 200 A) configured to surround an outer side of a combustion chamber (C), configured with a region at one side of each one of the plates and configured to heat the heating medium using sensible heat of the combustion gas generated by combustion of the burner ( 100 ); and a latent heat unit ( 200 B) configured with a region at the other side of each one of the plates and configured to heat the heating medium using latent heat of water vapor contained in the combustion gas which undergoes heat exchange in the sensible heat unit ( 200 A); and
guide units ( 221 ) and ( 261 ) configured to block some areas of the heating medium flow channels and guide the heating medium to flow near to a center of the combustion chamber (C) are formed at a heating medium flow channel of the sensible heat unit ( 200 A),
wherein:
through-holes (H 1 , H 5 ) provided at one side of the latent heat unit ( 200 B) and through-holes (H 2 , H 6 ) provided at the other side are diagonally formed at the latent heat unit ( 200 B), and
through-holes (H 3 , H 7 ) provided at one side of the sensible heat unit ( 200 A) and through-holes (H 4 , H 8 ) provided at the other side are diagonally formed at the sensible heat unit ( 200 A).

2. The heat exchanger of claim 1 , wherein a plurality of guide units ( 221 ) and ( 261 ) are formed and circumferentially spaced apart at an outer side portion of the sensible heat unit ( 200 A).

3. The heat exchanger of claim 2 , wherein the guide units ( 221 ) and ( 261 ) include a plurality of guide units spaced apart from a front side to a rear side on the basis of a flow direction of the heating medium and disposed in a diagonal direction near to the combustion chamber (C).

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

5. The heat exchanger of claim 4 , wherein the guide units ( 221 ) and ( 261 ) are configured with a plurality of first guide units ( 221 ) protruding from the first plate toward the heating medium flow channel, and a plurality of second guide units ( 261 ) protruding from the second plate toward the heating medium flow channel and formed at positions corresponding to the plurality of first guide units ( 221 ).

6. The heat exchanger of claim 4 , 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 ata center of the first protrusion ( 220 ) to constitute the sensible heat unit ( 200 A); and a second protrusion ( 230 ) protruding forward from the other side of the first plane portion ( 210 ) to the front side and configured to form the latent heat unit ( 200 B), and the second plate is configured with a second plane portion ( 250 ); a first recess ( 260 ) recessed from one side of the second plane portion ( 250 ) to a rear side, configured to form a sensible heat unit heating medium flow channel (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 from the other side of the second plane portion ( 250 ) to the rear side and configured to form a latent heat unit heating medium flow channel (P 1 ) between the second protrusion ( 230 ) and the second recess ( 270 ).

7. The heat exchanger of claim 6 , wherein the guide units ( 221 ) and ( 261 ) are configured with a plurality of first guide units ( 221 ) protruding from the first protrusion ( 220 ) toward the sensible heat unit heating medium flow channel (P 3 ); and a plurality of second guide units ( 261 ) protruding from the first recess ( 260 ) toward the sensible heat unit heating medium flow channel (P 3 ) and formed at positions corresponding to the plurality of first guide units ( 221 ).

8. The heat exchanger of claim 5 , wherein a protruding end of each of the plurality of first guide units ( 221 ) and a protruding end of each of the plurality of second guide units ( 261 ) are formed to be in contact with each other.

9. The heat exchanger of claim 6 , 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 bent in opposite directions.

10. The heat exchanger of claim 6 , wherein a plurality of first gap maintaining portions ( 222 ) protruding toward the combustion gas flow channel are formed at the first protrusion ( 220 ), and a plurality of second gap maintaining portions ( 262 ) are formed at the first recess ( 260 ) to protrude toward the combustion gas flow channel at positions corresponding to the plurality of first gap maintaining portions ( 222 ).

11. The heat exchanger of claim 10 , 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.

12. The heat exchanger of claim 4 , wherein one of ends of the first and second plates disposed at a circumference of the combustion chamber (C) is bent, seamed, and weld-coupled to be in close contact with the other ends of the first and second plates.

13. The heat exchanger of claim 12 , wherein a length of the seamed end of the first plate or the second plate is in a range of 1 to 5 mm.

14. The heat exchanger of claim 1 , wherein combustion gas flow channels of the sensible heat unit ( 200 A) are formed at intervals in a range of 0.8 to 1.6 mm.

15. The heat exchanger of claim 1 , wherein each of the plates has an upright structure such that the sensible heat unit ( 200 A) is disposed at an upper portion and the latent heat unit ( 200 B) is disposed at a lower portion, and the burner ( 100 ) is assembled by being inserted into a space of the combustion chamber (C) in a horizontal direction from a front surface thereof.

16. The heat exchanger of claim 1 , wherein each of the plates constituting the sensible heat unit ( 200 A) is formed such that a width (E 1 ) of a side region facing the latent heat unit ( 200 B) is formed to be larger than that (E 2 ) of a region opposite the latent heat unit ( 200 B).

17. The heat exchanger of claim 1 , wherein the latent heat unit ( 200 B) is configured with a heating medium inlet ( 201 ) into which the heating medium flows, and a plurality of latent heat unit heating medium flow channels (P 1 ) formed between a plurality of plates in parallel thereto and configured to communicate with the heating medium inlet ( 201 ), and
the sensible heat unit ( 200 A) is configured with a heating medium outlet ( 202 ) through which th

Assignees

• Kyungdong Navien Co Ltd

Inventors

• Jeong Inchul

Classifications

• F28F3/042

  in the form of local deformations of the element · CPC title

• F24H8/00

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

• F28D9/0093

  Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids · CPC title

• F24H1/445

  with integrated flue gas condenser · CPC title

• Y02B30/00

  Energy efficient heating, ventilation or air conditioning [HVAC] · CPC title