Heat exchanger

Patent metadata

Field	Value
Publication number	US-11313585-B2
Application number	US-201615778477-A
Country	US
Kind code	B2
Filing date	Nov 22, 2016
Priority date	Nov 25, 2015
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

A heat exchanger includes front and rear walls forming a flue gas space such that a fluid flowing through a channel formed in the front and rear walls can exchange heat with flue gas in the flue gas space, in use. An entirety of the back wall extends along a first plane, and the back wall is provided with a back fin. The front wall includes a lower portion extending upwardly along the back wall, and an upper portion extending upwardly from an upper end of the lower portion and outwardly away from the back wall to form a combustion space of a flammable gas between the upper portion and the back wall. The upper portion is provided with a front fin. The front and back fins are arranged symmetrically with respect to a virtual line along which the flammable gas is to be injected into the combustion space.

First claim

The invention claimed is:

1. A heat exchanger comprising:
a front wall; and
a back wall forming a flue gas space together with the front wall such that a fluid flowing through a channel formed in the front wall and back wall can exchange heat with flue gas in the flue gas space, in use,
an entirety of the back wall extending along a first plane, and the back wall being provided with a back fin,
the front wall including
a lower portion extending upwardly along the back wall, and
an upper portion extending upwardly from an upper end of the lower portion and outwardly away from the back wall to form a combustion space of a flammable gas between the upper portion and the back wall, and the upper portion being provided with a front fin,

the front fin and the back fin being arranged symmetrically with respect to a virtual line along which the flammable gas is to be injected into the combustion space, the virtual line intersecting with the first plane,
a distance between the upper portion of the front wall and the back wall continuously increasing in the upward direction,
the front wall and the back wall being asymmetric relative to a center line of the heat exchanger that extends substantially parallel to the first plane,
the front wall being provided with front pins, the front pins extending backwardly from an inner surface of the front wall,
some of the front pins being arranged at the upper portion of the front wall below the front fin,
a remainder of the front pins being arranged at the lower portion of the front wall,
the back wall being provided with back pins extending forwardly from an inner surface of the back wall, and
the front pins arranged at the lower portion being connected to the back pins disposed at corresponding locations.

2. The heat exchanger according to claim 1 , wherein
the front fin protrudes from an inner surface of the front wall and the back fin protrudes from an inner surface of the back wall.

3. The heat exchanger according to claim 1 , wherein
the front wall is provided with a plurality of the front fins and the back wall is provided with a plurality of the back fins respectively corresponding to the front fins,
at least some of the front fins and corresponding back fins include respectively a first portion and a second portion arranged below the first portion, and
a height of the first portion from an inner surface of the corresponding wall is smaller than a height of the second portion from an inner surface of the corresponding wall.

4. The heat exchanger according to claim 1 , wherein
the front wall is provided with a plurality of the front fins and the back wall is provided with a plurality of the back fins respectively corresponding to the front fins,
at least some of the front fins and corresponding back fins include respectively an inwardly bulged portion that bulges toward the virtual line and an outwardly curved portion that curves away from the virtual line, and
the outwardly curved portion is arranged below the inwardly bulged portion.

5. The heat exchanger according to claim 4 , wherein
the inwardly bulged portions and the outwardly curved portions are formed so as to keep a predetermined distance between a burner to be installed on the heat exchanger and the fin.

6. The heat exchanger according to claim 1 , wherein
the front wall is provided with a plurality of the front fins and the back wall is provided with a plurality of the back fins respectively corresponding to the front fins,
at least some of the front fins and corresponding back fins have respectively tapered portions where a height of the fin from an inner surface of the corresponding wall gradually decreases towards an upper end of the fin.

7. The heat exchanger according to claim 1 , wherein
the front pins are arranged at the upper portion of the front wall so as to face back pins disposed at corresponding locations.

8. The heat exchanger according to claim 1 ,
wherein the front pins arranged at the upper portion of the front wall are formed so as to decrease distances between the front pins and the back pins toward a downside.

9. The heat exchanger according to claim 1 , wherein
each pin has a larger surface area per unit volume than each fin.

10. The heat exchanger according to claim 2 , wherein
the front wall is provided with a plurality of the front fins and the back wall is provided with a plurality of the back fins respectively corresponding to the front fins,
at least some of the front fins and corresponding back fins include respectively a first portion and a second portion arranged below the first portion, and
a height of the first portion from the inner surface of the corresponding wall is smaller than a height of the second portion from the inner surface of the corresponding wall.

11. The heat exchanger according to claim 2 , wherein
the front wall is provided with a plurality of the front fins and the back wall is provided with a plurality of the back fins respectively corresponding to the front fins,
at least some of the front fins and corresponding back fins include respectively an inwardly bulged portion that bulges toward the virtual line and an outwardly curved portion that curves away from the virtual line, and
the outwardly curved portion is arranged below the inwardly bulged portion.

12. The heat exchanger according to claim 2 , wherein
the front wall is provided with a plurality of the front fins and the back wall is provided with a plurality of the back fins respectively corresponding to the front fins,
at least some of the front fins and corresponding back fins have respectively tapered portions where a height of the fin from the inner surface of the corresponding wall gradually decreases towards an upper end of the fin.

13. The heat exchanger according to claim 3 , wherein
the front wall is provided with a plurality of the front fins and the back wall is provided with a plurality of the back fins respectively corresponding to the front fins,
at least some of the front fins and corresponding back fins include respectively an inwardly bulged portion that bulges toward the virtual line and an outwardly curved portion that curves away from the virtual line, and
the outwardly curved portion is arranged below the inwardly bulged portion.

14. The heat exchanger according to claim 3 , wherein
the front wall is provided with a plurality of the front fins and the back wall is provided with a plurality of the back fins respectively corresponding to the front fins,
at least some of the front fins and corresponding back fins have respectively tapered portions where a height of the fin from the inner surface of the corresponding wall gradually decreases towards an upper end of the fin.

15. The heat exchanger according to claim 4 , wherein
the front wall is provided with a plurality of the front fins and the back wall is provided with a plurality of the back fins respectively corresponding to the front fins,
at least some of the front fins and corresponding back fins have respectively tapered portions where a height of the fin from the inner surface of the corresponding wall gradually decreases towards an upper end of the fin.

Assignees

• Daikin Ind Ltd
• Daikin Europe Nv

Inventors

• Kilic Serhan M
• Peker Hakan
• Tuna Aydin

Classifications

• F28D7/1692

  with particular pattern of flow of the heat exchange media, e.g. change of flow direction · CPC title

• F28F3/048

  in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels · CPC title

• F28F1/40

  the means being only inside the tubular element · CPC title

• F24H1/107 Primary

  using fluid fuel · CPC title

• F24H1/38

  with water contained in separate elements, e.g. radiator-type element · CPC title