Heat exchanger

Patent metadata

Field	Value
Publication number	US-2016377319-A1
Application number	US-201615258064-A
Country	US
Kind code	A1
Filing date	Sep 7, 2016
Priority date	Mar 18, 2014
Publication date	Dec 29, 2016
Grant date	—

Abstract

The present invention relates to a heat exchanger comprising: a burner for combusting a mixture of air and fuel; and a heat exchange unit in which heat is exchanged between combustion gas caused by the combustion of the burner and a heating medium, wherein the heat exchange unit includes a plurality of unit plates stacked on each other, and a sensible-heat exchange unit and a latent-heat exchange unit coaxially disposed around the burner are integrally formed with the unit plates.

First claim

1 . A heat exchanger comprising:
a burner 200 configured to burn a mixture of air and fuel; and a heat exchange unit 300 configured to exchange heat between combustion gas generated by combustion of the burner 200 and a heating medium, wherein the heat exchange unit 300 is configured by stacking a plurality of unit plates, and a sensible-heat exchange unit 300 - 1 and a latent-heat exchange unit 300 - 2 are arranged at a circumference of the burner 200 in a coaxial structure to be integrally formed at the plurality of stacked unit plates.

2 . The heat exchanger of claim 1 , wherein a first heating medium passage P 1 and a first combustion gas passage P 2 are separately and alternately formed to be adjacent to each other at the sensible-heat exchange unit 300 - 1 , a second heating medium passage P 3 and a second combustion gas passage P 4 are separately and alternately formed to be adjacent to each other at the latent-heat exchange unit 300 - 2 , and a combustion gas discharge passage P 5 is formed at an edge of each of the plurality of unit plates to discharge combustion gas passed the first combustion gas passage P 2 and the second combustion gas passage P 4 .

3 . The heat exchanger of claim 2 , wherein each of the plurality of unit plates is configured with a first plate and a second plate which are longitudinally stacked,
wherein the first plate includes: a first plane portion A 1 in which a first through hole B 1 is formed at a central part thereof; a first flange portion C 1 formed to extend from an edge of the first plane portion A 1 to an upper side thereof to be bended to an outward side thereof; and a first passage forming protruding portion D 1 and a second passage forming protruding portion D 3 formed to spaced apart from each other to an inward side and an outward side at a region between the edge of the first plane portion A 1 and the first through hole B 1 and having an upwardly convex shape, and wherein the second plate includes: a second plane portion A 2 in which a second through hole B 2 of a shape corresponding to that of the first through hole B 1 is formed at a central part of the second plane portion A 2 and having an upper surface coming into tight contact with a bottom surface of the first plane portion A 1 ; a second flange portion C 2 formed to extend from an edge of the second plane portion A 2 to a lower side thereof to be bended to an outward side and coupled to a first flange portion C 1 of a unit plate being located below the second plate; and a first passage forming depressed portion D 2 and a second passage forming depressed portion D 4 arranged to be spaced apart from each other to an inward side and an outward side at a region between the edge of the second plane portion A 2 and the second through hole B 2 and formed to be concave downward, wherein the first passage forming depressed portion D 2 forms the first heating medium passage P 1 between the first passage forming protruding portion D 1 and the first passage forming depressed portion D 2 , and the second passage forming depressed portion D 4 forms the second heating medium passage P 3 between the passage forming protruding portion D 3 and the second passage forming depressed portion D 4 .

4 . The heat exchanger of claim 3 , wherein the first flange portion C 1 is formed to be higher than a protruding height of each of the first passage forming protruding portion D 1 and the second passage forming protruding portion D 3 , the second flange portion C 2 is formed to be deeper than a depressed depth of each of the first passage forming depressed portion D 2 and the second passage forming depressed portion D 4 , and thus a longitudinally separated space is provided between a lower end of a first passage forming depressed portion D 2 of a unit plate being located at an upper side among unit plates being longitudinally located to be adjacent to each other, and an upper end of a first passage forming protruding portion D 1 of a unit plate being located at a lower side thereamong, thereby forming the first combustion gas passage P 2 , and a longitudinally separated space is provided between a lower end of a second passage forming depressed portion D 4 of the unit plate being located the upper side and an upper end of a second passage forming protruding portion D 3 of the unit plate being located at the lower side, thereby forming the second combustion gas passage P 4 .

5 . The heat exchanger of claim 4 , wherein a plurality of first gap maintaining protruding portions E 1 are formed to protrude at the same height as that of the first flange portion C 1 at the first passage forming protruding portion D 1 , a plurality of second gap maintaining protruding portions E 3 are formed to protrude at the same height as that of the first flange portion C 1 at the second passage forming protruding portion D 3 , a plurality of first gap maintaining depressed portions E 2 are formed to be depressed at the same depth as that of the second flange portion C 2 at the first passage forming depressed portion D 2 , and a plurality of second gap maintaining depressed portions E 4 are formed to be depressed at the same depth as that of the second flange portion C 2 at the second passage forming depressed portion D 4 .

6 . The heat exchanger of claim 4 , wherein a first combustion gas outlet F 1 is formed at the edge of the first plane portion A 1 to provide the combustion gas discharge passage P 5 , and a second combustion gas outlet F 2 is formed at a position on the edge of the second plane portion A 2 , wherein the position longitudinally corresponds to the first combustion gas outlet F 1 , and thus combustion gas, which passed the first combustion gas passage P 2 and the second combustion gas passage P 4 , sequentially passes the first combustion gas outlet F 1 and the second combustion gas outlet F 2 which are formed at each of the plurality of unit plates being longitudinally stacked, thereby being discharged.

7 . The heat exchanger of claim 4 , wherein a turbulent flow forming portion G having an irregular shape on a surface thereof is formed at the first passage forming protruding portion D 1 , the first passage forming depressed portion D 2 , the second passage forming protruding portion D 3 , and the second passage forming depressed portion D 4 ,
wherein a protruding upper end and a depressed lower end of the turbulent flow forming portion G are formed to come into contact with each other inside the first heating medium passage P 1 and the second heating medium passage P 3 .

8 . The heat exchanger of claim 5 , wherein the first passage forming protruding portion D 1 is formed to be entirely communicated along a circumferential direction of the first plate, the first passage forming depressed portion D 2 is formed to be entirely communicated along a circumferential direction of the second plate, and a through hole is formed at the first gap maintaining protruding portion E 1 and the first gap maintaining depressed portion E 2 so as to connect a first heating medium passage P 1 of the unit plate being located at the upper side to that of the unit plate being located at the lower side,
wherein the through hole is located to reverse a direction of the first heating medium passage P 1 in the unit plate being located at the upper side against that of the first heating medium passage P 1 in the unit plate being located at the lower side.

9 . The heat exchanger of claim 8 , wherein a heating medium, which flowed in through a through hole formed at one side of a first plate configuring a unit plate being located at an upper side among unit plates that are longitudinally located to be adjacent to each

Assignees

• Kyungdong Navien Co Ltd

Inventors

• Kim Young Mo

Classifications

• F24H1/30

  the water mantle being built up from sections · CPC title

• F28D9/0043

  the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another · CPC title

• F28F3/044

  the deformations being pontual, e.g. dimples · CPC title

• F24H8/00 Primary

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

• F24H1/165 Primary

  using fluid fuel · CPC title