EP3596406A1 - Échangeur de chaleur - Google Patents

Échangeur de chaleur

Info

Publication number
EP3596406A1
EP3596406A1 EP18768251.3A EP18768251A EP3596406A1 EP 3596406 A1 EP3596406 A1 EP 3596406A1 EP 18768251 A EP18768251 A EP 18768251A EP 3596406 A1 EP3596406 A1 EP 3596406A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
inlet end
recited
burner
insulation sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18768251.3A
Other languages
German (de)
English (en)
Other versions
EP3596406A4 (fr
Inventor
Michael J. O'donnell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beckett Thermal Solutions
Original Assignee
Beckett Gas Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beckett Gas Inc filed Critical Beckett Gas Inc
Publication of EP3596406A1 publication Critical patent/EP3596406A1/fr
Publication of EP3596406A4 publication Critical patent/EP3596406A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/126—Radiant burners cooperating with refractory wall surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/08—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
    • F24H3/087—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/0233—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels
    • F28D1/024—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels with an air driving element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
    • F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/006—Tubular elements; Assemblies of tubular elements with variable shape, e.g. with modified tube ends, with different geometrical features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/04—Constructions of heat-exchange apparatus characterised by the selection of particular materials of ceramic; of concrete; of natural stone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0278—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of stacked distribution plates or perforated plates arranged over end plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/028—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/185—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding with additional preformed parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/005—Radiant burner heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1877—Arrangement or mounting of combustion heating means, e.g. grates or burners
    • F24H9/1881—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0024—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for combustion apparatus, e.g. for boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2270/00—Thermal insulation; Thermal decoupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/165—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets
    • F28F9/167—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets the parts being inserted in the heat-exchange conduits

Definitions

  • the present invention relates generally to burner systems and, more specifically, relates to a heat exchanger for a burner.
  • Inshot burners which have been the industry standard for many years are not capable of meeting the new NO x requirements. Inshots are relatively low primary aeration burners, which typically fired into a tubular type heat exchanger. Secondary air is introduced around the perimeter of the centrally located flame. The secondary air gradually enters the flame to complete the combustion as it makes its way down the length of the tube. The secondary air also shields the tube inlet from exposure to the flame as it enters the tube.
  • the relatively low primary air flame also has a lower flame temperature than a more highly aerated premixed flame. Since most furnace manufacturers make high volumes of furnaces for sale throughout the country, it is not practical or cost effective to make a completely new furnace model for the California market. The desire of these manufactures is to use as much of the existing furnace as possible, with only the burner changing to meet the requirements. The best option for meeting the requirements is to switch to a fully premixed burner system. This system, however, can cause overheating of the vestibule panel and heat exchanger tubes.
  • a heat exchanger for an appliance having a burner includes at least one tubular heat exchanger section extending from an inlet end aligned with the burner and an outlet end.
  • the inlet end includes a first portion having a first inner diameter and a second portion having a second inner diameter greater than the first diameter.
  • a furnace in another example, includes a burner including a distributor having at least one curved second portion for providing a flame.
  • a vestibule panel connected to the burner includes an opening aligned with each second portion downstream of the burner.
  • a heat exchanger has at least one tubular heat exchanger section extending from an inlet end aligned with each second portion of the burner and an outlet end. The inlet end includes a first portion having a first inner diameter and a second portion having a second inner diameter greater than the first diameter.
  • a heat exchanger for an appliance having a burner includes a plurality of heat exchanger sections each extending from an inlet end aligned with the burner and an outlet end.
  • the inlet and outlet ends are positioned on the same side of the heat exchanger section.
  • Each inlet end includes a first portion having a first inner diameter and a second portion having a second inner diameter greater than the first diameter
  • a ceramic insulation sleeve is positioned within the second portion of each heat exchanger section and has an inner diameter substantially equal to the first diameter of the inlet end. The insulation sleeve helps to protect the inlet end from thermal damage.
  • FIG. 1 is schematic illustration of an appliance including a heat exchanger in accordance with the present invention.
  • Fig. 2A is an assembly view of components including the heat exchanger in the appliance of Fig. 1.
  • Fig. 2B is an exploded view of alternative components of the appliance.
  • Fig. 3 is a side view of a heat exchanger section of the heat exchanger in Fig. 2A.
  • Fig. 4 is a section view of Fig. 3 taken along line 4-4.
  • FIG. 5 is a front view of a vestibule panel of the appliance of Fig. 1 A.
  • Fig. 6 is a section view of Fig. 5 taken along line 6-6.
  • Fig. 7A is a front view of an insulation sleeve for the heat exchanger section of Fig. 3.
  • Fig. 7B is an enlarged view of a portion of the heat exchanger section of Fig. 3 including the insulation sleeve of Fig. 7A.
  • FIG. 8 is a schematic illustration of operation of the heat exchanger in a first example.
  • FIG. 9 is a schematic illustration of operation of the heat exchanger in a second example.
  • the present invention relates generally to burner systems and, more specifically, relates to a heat exchanger for a burner.
  • the heat exchanger is provided in an appliance, such as a furnace 10.
  • the furnace 10 includes a heat exchanger 20, vestibule panel 40, burner 50, gasket 60, and an inducer blower 68 (Fig. 2A).
  • the furnace 10 can include the heat exchanger 20, vestibule panel 40a, burner 50, gasket 60, and a secondary heat exchanger 80 (see Fig. 2B).
  • the burner 50 can be positioned nearer the bottom of the vestibule panel 40 (Fig. 2A) or nearer the top of the vestibule panel 40a (Fig. 2B) depending on the configuration of the appliance 10. The remainder of the description is directed to the appliance 10 component configuration of Fig. 2A unless otherwise noted.
  • the heat exchanger 20 includes at least one heat exchanger section 22. Although five sections 22 are shown it will be appreciated that more or fewer sections - including a single section - can be provided.
  • the sections 22 are hollow and substantially identical to one another.
  • Each heat exchanger section 22 is formed as a serpentine tube extending along a centerline 23 from a first or inlet end 24 to a second or outlet end 26.
  • the inlet end 24 terminates at an opening 25 and the outlet end 26 terminates at an opening 27.
  • the ends 24, 26 and therefore the openings 25, 27 are positioned on the same [left] side of the heat exchanger section 22.
  • the ends 25, 26 and openings 25, 27 could be positioned on opposite sides of the heat exchange section 22 (Fig. 2B).
  • a passage 30 extends the entire length of the section 22 from the opening 25 to the opening 27.
  • each heat exchanger section 22 includes a wall 70 defining a first portion 74 and a second portion 76 upstream of the first portion.
  • the first portion 74 has a first inner diameter ⁇ and the second portion 76 has a second inner diameter ⁇ 2 greater than the first inner diameter.
  • a tapered or angled neck 78 connects the first and second portions 74, 76 together.
  • the heat exchanger section 22 can have substantially the same first inner diameter ⁇ from the neck 78 to the opening 27 in the outlet end 26. Alternatively, the first inner diameter ⁇ can taper down in a direction extending towards the opening 27 in the outlet end 26 (not shown).
  • the vestibule panel 40 can be planar and includes opposing sides 42, 44.
  • a layer of thermal insulation (not shown) can line at least a portion of the side 44.
  • First openings 43 and second openings 45 extend entirely through the vestibule panel 40 between the sides 42, 44.
  • the number of first openings 43 and second openings 45 each corresponds with the number of heat exchanger sections 22.
  • the first openings 43 are positioned nearer the bottom of the vestibule panel 40.
  • the second openings 45 are positioned nearer the top of the vestibule panel 40.
  • the first openings 43 could, however, be located nearer the top of the vestibule panel 40a (see Fig. 2B).
  • the sections 22 are connected to the vestibule panel 40 via a swaged or welded connection 46 (Fig. 2A).
  • the inlet ends 24 of the sections 22 are positioned in the openings 43 in the vestibule panel 40. This aligns the openings 25 in the inlet ends 24 with the openings 43 in the vestibule panel 40.
  • the outlet ends 26 are positioned in the openings 45 in the vestibule panel 40 and connected thereto by swaging or welding at 46. This aligns the openings 27 in the outlet ends 26 with the openings 45 in the vestibule panel 40.
  • the fluid passage 30 of each section 22 is therefore fluidly connected with a corresponding pair of openings 43, 45 in the vestibule panel 40.
  • the burner 50 is positioned upstream of the vestibule panel 40 and the sections 22, i.e., secured to the side 42 of the vestibule panel.
  • the burner 50 can constitute a non-premixed burner or a pre-mixed burner.
  • the premixed burner can be partially or fully premixed.
  • the burner 50 is a fully premixed, low NO x burner.
  • the burner 50 includes a housing 52 defining a combustion chamber 54 therein.
  • a distributor 56 is secured to the housing 52 to close the combustion chamber 54.
  • the distributor 56 is formed from a thin, durable, and heat-resistant material such as metal, a metal screen or expanded metal.
  • the distributor 56 includes a planar first portion 57 and at least one dimple or second portion 58 formed or provided on the first portion.
  • each second portion 58 is curved or dimple-shaped, e.g., rounded, hemispherical, concave or convex. Every second portion 58 may have the same configuration or different configurations from one another.
  • a concave second portion 58 provides a narrow, long or elongated flame while a convex second portion will provide a wider, more dispersed flame.
  • each second portion 58 coincides with the number, size, and spacing of the downstream first openings 43 and heat exchanger sections 22 present.
  • each second portion 58 is aligned with the inlet end 24 of an associated heat exchanger section 22 such that the end of each section is in fluid communication with each second portion.
  • Each second portion 58 can be configured to provide a desired flame
  • the gasket 60 is positioned between the distributor 56 -more specifically the entire burner 50 - and the side 42 of the vestibule panel 40.
  • the gasket 60 includes a plurality of openings 62. Each opening 62 is aligned with one of the second portions 58 on the distributor 56 and one of the first openings 43 in the vestibule panel 40.
  • the openings 62 are also each aligned with one of the inlet ends 24 - more specifically the openings 25 therein - of the sections 22 on the opposite side 44 of the vestibule panel 40.
  • an optional insulation sleeve 90 can be inserted into the first end 24 of each heat exchanger section 22.
  • the insulation sleeve 90 is tubular and includes a passage 91 extending between a pair of openings 92, 94.
  • the insulation sleeve 90 has an inner diameter ⁇ 3 substantially equal to the first diameter ⁇ of the first portion 74 and a radial thickness "t".
  • the insulation sleeve 90 can be made from any thermally insulating material, such as a ceramic or glass/silica fiber.
  • the insulation sleeve 90 is inserted into the second portion 76 of the heat exchanger section 22 until one end adjacent the opening 94 abuts or is in close proximity with the neck 78.
  • the other end of the insulation sleeve 90 adjacent the opening 92 is aligned with the opening 43 in the vestibule panel 40.
  • the insulation sleeve 90 is held in place by friction with the second portion 76, the neck 78, and/or the gasket 60.
  • the openings 92, 94 of each insulation sleeve 90 are aligned with an opening 43 in the vestibule panel 40, an opening 62 in the gasket 60, and one of the second portions 58 of the burner 50 (see Fig. 2B).
  • the third diameter ⁇ 3 and thickness t of the insulation sleeve 90 are configured such that when the insulation sleeve is provided within the second section 76, the sleeve radially abuts the wall 70 and the sleeve passage 91 is longitudinally aligned with the first portion 74. As a result, there is no radial air gap between the insulation sleeve 90 and the wall 70.
  • the radially innermost structure within the section 22 - either the insulation sleeve 90 material or the wall 70 inner surface of the first section 74 - has a substantially constant diameter.
  • flames F emanating from each second portion 58 extend through the associated opening 62 of the gasket 60, the opening 43 in the vestibule panel 40, and into the opening 25 at the inlet end 24 of the associated heat exchange section 22.
  • the flames F are tailored such that the tip of each flame terminates at or adjacent to the opening 25 in the inlet end 24 of each section 22, i.e., the flames may barely extend into the interior of each tube and therefore barely extend into the insulation sleeve 90. Alternatively, it will be
  • insulation sleeve 90 described herein can be omitted from one or more of the inlet ends 24 (see Fig. 9) and, thus, the flame F would barely extend into the second portion 76 of the inlet end 24.
  • the burner 50 is a premixed burner
  • the very short flame F and rapid release of heat can cause the vestibule panel 40 and/or inlet ends 24 of the heat exchanger sections 22 to overheat.
  • the sleeve 90 of the present invention helps alleviate these overheating concerns by providing insulation within the inlet ends 24 of the heat exchanger sections 22.
  • the insulation sleeve 90 described herein helps protect the material forming the inlet end 24 from thermal damage due to the increased heat provided by the pre- mix/low NO x burner 50. That said, the length of the second portion 76 and the length of the insulation sleeve 90 can be tailored to provide a desired degree of temperature
  • the expanded second portion 76 helps protect the smaller diameter first portion 74 by providing enough space near/around the flame such that the wall 70 is not damaged or heated beyond its rating/allowable limit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ceramic Engineering (AREA)
  • Geometry (AREA)
  • Gas Burners (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

La présente invention concerne un échangeur de chaleur destiné à un appareil doté d'un brûleur, ledit échangeur de chaleur comprenant une ou plusieurs sections d'échangeur de chaleur tubulaires qui s'étendent à partir d'une extrémité d'entrée alignée avec le brûleur et une extrémité de sortie. L'extrémité d'entrée comprend une première partie avec un premier diamètre interne et une seconde partie avec un second diamètre interne qui est plus grand que le premier diamètre interne.
EP18768251.3A 2017-03-17 2018-03-19 Échangeur de chaleur Withdrawn EP3596406A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762472842P 2017-03-17 2017-03-17
PCT/US2018/023160 WO2018170514A1 (fr) 2017-03-17 2018-03-19 Échangeur de chaleur

Publications (2)

Publication Number Publication Date
EP3596406A1 true EP3596406A1 (fr) 2020-01-22
EP3596406A4 EP3596406A4 (fr) 2021-04-28

Family

ID=63523352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18768251.3A Withdrawn EP3596406A4 (fr) 2017-03-17 2018-03-19 Échangeur de chaleur

Country Status (5)

Country Link
US (1) US20190368726A1 (fr)
EP (1) EP3596406A4 (fr)
CN (1) CN110709646A (fr)
CA (1) CA3055303A1 (fr)
WO (1) WO2018170514A1 (fr)

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US11382460B2 (en) * 2020-06-03 2022-07-12 Hyper Fryer, LLC High-efficiency heating apparatus

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US20190368726A1 (en) 2019-12-05
CA3055303A1 (fr) 2018-09-20
EP3596406A4 (fr) 2021-04-28
CN110709646A (zh) 2020-01-17
WO2018170514A1 (fr) 2018-09-20

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