Heat exchanger unit and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-12130052-B2
Application number	US-202017131772-A
Country	US
Kind code	B2
Filing date	Dec 23, 2020
Priority date	Dec 30, 2019
Publication date	Oct 29, 2024
Grant date	Oct 29, 2024

Abstract

A heat exchanger unit according to the present disclosure includes a combustion chamber in which a flame caused by a combustion reaction is located, a heat exchanger for a condensing boiler, the heat exchanger being located under the combustion chamber and including heat exchange pipes that receive heat generated by the combustion reaction and heat heating-water flowing through the heat exchange pipes and a main case having the heat exchange pipes accommodated in an interior space thereof, and a combustion chamber heat insulation pipe that is disposed adjacent to the combustion chamber and that receives the heating-water and allows the heating-water to flow therethrough to thermally insulate the combustion chamber.

First claim

What is claimed is:

1. A heat exchanger unit comprising:
a combustion chamber in which a flame caused by a combustion reaction is located;
a heat exchanger for a condensing boiler, the heat exchanger being located under the combustion chamber, wherein the heat exchanger includes heat exchange pipes configured to receive heat generated by the combustion reaction and to heat heating-water flowing through the heat exchange pipes and a main case having the heat exchange pipes accommodated in an interior space thereof; and
a combustion chamber heat insulation pipe disposed adjacent to the combustion chamber and configured to receive the heating-water and allow the heating-water to flow therethrough to thermally insulate the combustion chamber,
wherein the combustion chamber includes a combustion chamber case configured to form an interior space in which the flame is located and a combustion chamber flange protruding from a lower end of the combustion chamber case,
wherein the heat exchanger for the condensing boiler further includes a heat exchanger flange protruding from an upper end of the main case, the heat exchanger flange being coupled with the combustion chamber flange,
wherein the combustion chamber and the heat exchanger for the condensing boiler are coupled by a brazing process of applying and heating a paste, and
wherein the paste is applied between the combustion chamber flange and the heat exchanger flange so that no closed space surrounded by the combustion chamber flange and the heat exchanger flange is formed.

2. The heat exchanger unit of claim 1 , wherein the combustion chamber heat insulation pipe includes a plurality of combustion chamber heat insulation pipes disposed adjacent to left and right sides of the combustion chamber and spaced apart from each other in an up/down direction.

3. The heat exchanger unit of claim 2 , wherein the combustion chamber heat insulation pipes disposed on the left side of the combustion chamber have a common inlet, and
wherein the combustion chamber heat insulation pipes disposed on the right side of the combustion chamber are fluidically connected with the combustion chamber heat insulation pipes disposed on the left side of the combustion chamber, respectively, to form a parallel flow passage.

4. The heat exchanger unit of claim 2 , wherein the combustion chamber heat insulation pipes are sequentially connected in series to form a combustion chamber flow passage.

5. The heat exchanger unit of claim 2 , wherein the combustion chamber includes:
two general combustion chamber side plate portions spaced apart from each other in a fore/aft direction;
two combustion chamber heat insulation side plate portions spaced apart from each other in a left/right direction and configured to form an interior space of the combustion chamber together with the two general combustion chamber side plate portions; and
combustion chamber flow passage cap plates including combustion chamber flow passage caps configured to form connection spaces between the general combustion chamber side plate portions and the combustion chamber flow passage caps, and
wherein to connect the combustion chamber heat insulation pipes, the connection spaces surround openings formed in end portions of the combustion chamber heat insulation pipes.

6. The heat exchanger unit of claim 1 , wherein the combustion chamber flange protrudes outward from the lower end of the combustion chamber case, and
wherein the heat exchanger flange protrudes outward from the upper end of the main case.

7. The heat exchanger unit of claim 6 , wherein the combustion chamber flange includes a first coupling part,
wherein the heat exchanger flange includes a second coupling part disposed in a position corresponding to a position of the first coupling part, the first coupling part being coupled to the second coupling part, and
wherein one of the first coupling part and the second coupling part is a flange protrusion protruding from the corresponding flange, and the other is a flange through-hole into which the flange protrusion is fixedly inserted.

8. The heat exchanger unit of claim 6 , wherein the heat exchanger flange includes a heat exchanger flange body extending outward from the main case and a heat exchanger flange bending portion extending downward from an outer end of the heat exchanger flange body, and
wherein the combustion chamber flange includes a combustion chamber flange body extending outward from the combustion chamber case and a combustion chamber flange bending portion extending downward from an outer end of the combustion chamber flange body, the combustion chamber flange bending portion being configured to surround the heat exchanger flange bending portion from the outside.

9. The heat exchanger unit of claim 6 , wherein the heat exchanger flange includes a heat exchanger flange body extending outward from the main case and a heat exchanger flange embossing protruding upward from the heat exchanger flange body, and
wherein the combustion chamber flange includes a combustion chamber flange body extending outward from the combustion chamber case and a combustion chamber flange embossing protruding upward from the combustion chamber flange body, the combustion chamber flange embossing being formed in a position corresponding to a position of the heat exchanger flange embossing and inserted into a recess formed on a lower side of the heat exchanger flange embossing.

10. The heat exchanger unit of claim 1 , wherein the heat exchanger for the condensing boiler includes:
a sensible heat exchanger located under the combustion chamber, the sensible heat exchanger including a sensible heat exchange pipe and a sensible heat exchanger case configured to accommodate the sensible heat exchange pipe inside and to form the main case, the sensible heat exchange pipe being one of the heat exchange pipes configured to receive the heat generated by the combustion reaction and to heat the heating-water flowing through the heat exchange pipes; and
a latent heat exchanger located under the sensible heat exchanger and configured to receive latent heat generated during a phase change of a combustion gas generated by the combustion reaction and to heat the heating-water, and
wherein the heat exchanger unit further comprises a sensible heat insulation pipe disposed adjacent to the sensible heat exchanger case and configured to receive the heating-water and allow the heating-water to flow therethrough to thermally insulate the sensible heat exchanger.

11. The heat exchanger unit of claim 10 , further comprising:
a side plate packing configured to make contact with an inner surface of the sensible heat exchanger case to hamper, between the sensible heat insulation pipe and the combustion chamber heat insulation pipe, transfer of heat to the sensible heat exchanger case; and
a packing bracket configured to support the side plate packing such that the side plate packing is sandwiched between the inner surface of the sensible heat exchanger case and the packing bracket and is brought into contact with the inner surface of the sensible heat exchanger case.

12. The heat exchanger unit of claim 11 , wherein the packing bracket makes contact with the inner surface of the sensible heat exchanger case so as to meet the sensible heat insulation pipe, with the sensible heat exchanger case therebetween.

13. The heat exchanger unit of claim 10 , further comprising:
a protective bracket coupled to the sensible heat exchanger case and the combustion chamber, the protective bracket having a portion spaced apart from an inner surface of the sensible heat exchanger case and an inner

Assignees

• Kyungdong Navien Co Ltd

Inventors

• Park Jun Kyu
• Cho Sung Cheul

Classifications

• F28F2275/04

  by brazing · CPC title

• F24H9/146

  Connecting elements of a heat exchanger · CPC title

• F24H9/06

  Arrangement of mountings or supports · CPC title

• F24H7/005

  using fluid fuel · CPC title

• F24H1/201

  using electric energy supply · CPC title