US20190368726A1 - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
- Publication number
- US20190368726A1 US20190368726A1 US16/487,932 US201816487932A US2019368726A1 US 20190368726 A1 US20190368726 A1 US 20190368726A1 US 201816487932 A US201816487932 A US 201816487932A US 2019368726 A1 US2019368726 A1 US 2019368726A1
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- United States
- 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.)
- Abandoned
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Classifications
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
Definitions
- FIG. 3 is a side view of a heat exchanger section of the heat exchanger in FIG. 2A .
- 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 40 a , 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 40 a ( 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 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 40 a (see FIG. 2B ).
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- 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)
- Geometry (AREA)
- Ceramic Engineering (AREA)
- Gas Burners (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
- This application claims the benefit of U.S. Provisional Appln. No. 62/472,842, filed Mar. 17, 2017, the entirety of which is incorporated herein by reference.
- The present invention relates generally to burner systems and, more specifically, relates to a heat exchanger for a burner.
- Requirements for NOx emissions continue to become more stringent. California's South Coast Air Quality Management District is the world leader in NOx regulations. Recently enacted legislation for forced air furnaces have caused a shift in the type of combustion required for these products. Inshot burners, which have been the industry standard for many years are not capable of meeting the new NOx 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.
- In one example, 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.
- In another example, a furnace 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.
- In yet another example, 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.
- Other objects and advantages and a fuller understanding of the invention will be had from the following detailed description and the accompanying drawings.
-
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 ofFIG. 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 inFIG. 2A . -
FIG. 4 is a section view ofFIG. 3 taken along line 4-4. -
FIG. 5 is a front view of a vestibule panel of the appliance ofFIG. 1A . -
FIG. 6 is a section view ofFIG. 5 taken along line 6-6. -
FIG. 7A is a front view of an insulation sleeve for the heat exchanger section ofFIG. 3 . -
FIG. 7B is an enlarged view of a portion of the heat exchanger section ofFIG. 3 including the insulation sleeve ofFIG. 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. Referring to
FIG. 1 , the heat exchanger is provided in an appliance, such as afurnace 10. In one example, thefurnace 10 includes aheat exchanger 20,vestibule panel 40,burner 50,gasket 60, and an inducer blower 68 (FIG. 2A ). Alternatively, thefurnace 10 can include theheat exchanger 20,vestibule panel 40 a,burner 50,gasket 60, and a secondary heat exchanger 80 (seeFIG. 2B ). Theburner 50 can be positioned nearer the bottom of the vestibule panel 40 (FIG. 2A ) or nearer the top of thevestibule panel 40 a (FIG. 2B ) depending on the configuration of theappliance 10. The remainder of the description is directed to theappliance 10 component configuration ofFIG. 2A unless otherwise noted. - As shown in
FIGS. 3-4 , theheat exchanger 20 includes at least oneheat exchanger section 22. Although fivesections 22 are shown it will be appreciated that more or fewer sections—including a single section—can be provided. Thesections 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 orinlet end 24 to a second oroutlet end 26. Theinlet end 24 terminates at anopening 25 and theoutlet end 26 terminates at anopening 27. As shown, the ends 24, 26 and therefore theopenings heat exchanger section 22. Alternatively, the ends 25, 26 andopenings FIG. 2B ). In any case, apassage 30 extends the entire length of thesection 22 from theopening 25 to theopening 27. - The
inlet end 24 of eachheat exchanger section 22 includes awall 70 defining afirst portion 74 and asecond portion 76 upstream of the first portion. Thefirst portion 74 has a first inner diameter Φ1 and thesecond portion 76 has a second inner diameter Φ2 greater than the first inner diameter. A tapered orangled neck 78 connects the first andsecond portions heat exchanger section 22 can have substantially the same first inner diameter Φ1 from theneck 78 to theopening 27 in theoutlet end 26. Alternatively, the first inner diameter Φ1 can taper down in a direction extending towards the opening 27 in the outlet end 26 (not shown). - Referring to
FIGS. 5-6 , thevestibule panel 40 can be planar and includes opposingsides side 44.First openings 43 andsecond openings 45 extend entirely through thevestibule panel 40 between thesides first openings 43 andsecond openings 45 each corresponds with the number ofheat exchanger sections 22. Thefirst openings 43 are positioned nearer the bottom of thevestibule panel 40. Thesecond openings 45 are positioned nearer the top of thevestibule panel 40. Thefirst openings 43 could, however, be located nearer the top of thevestibule panel 40 a (seeFIG. 2B ). - The
sections 22 are connected to thevestibule panel 40 via a swaged or welded connection 46 (FIG. 2A ). The inlet ends 24 of thesections 22 are positioned in theopenings 43 in thevestibule panel 40. This aligns theopenings 25 in the inlet ends 24 with theopenings 43 in thevestibule panel 40. The outlet ends 26 are positioned in theopenings 45 in thevestibule panel 40 and connected thereto by swaging or welding at 46. This aligns theopenings 27 in the outlet ends 26 with theopenings 45 in thevestibule panel 40. Thefluid passage 30 of eachsection 22 is therefore fluidly connected with a corresponding pair ofopenings vestibule panel 40. - As shown in
FIGS. 2A-2B , theburner 50 is positioned upstream of thevestibule panel 40 and thesections 22, i.e., secured to theside 42 of the vestibule panel. Theburner 50 can constitute a non-premixed burner or a pre-mixed burner. The premixed burner can be partially or fully premixed. In one example, theburner 50 is a fully premixed, low NOx burner. Theburner 50 includes ahousing 52 defining acombustion chamber 54 therein. Adistributor 56 is secured to thehousing 52 to close thecombustion chamber 54. - The
distributor 56 is formed from a thin, durable, and heat-resistant material such as metal, a metal screen or expanded metal. Thedistributor 56 includes a planarfirst portion 57 and at least one dimple orsecond portion 58 formed or provided on the first portion. In one example, eachsecond portion 58 is curved or dimple-shaped, e.g., rounded, hemispherical, concave or convex. Everysecond portion 58 may have the same configuration or different configurations from one another. A concavesecond portion 58 provides a narrow, long or elongated flame while a convex second portion will provide a wider, more dispersed flame. - The number, size, and spacing of the
second portions 58 coincides with the number, size, and spacing of the downstreamfirst openings 43 andheat exchanger sections 22 present. In particular, eachsecond portion 58 is aligned with theinlet end 24 of an associatedheat exchanger section 22 such that the end of each section is in fluid communication with each second portion. Eachsecond portion 58 can be configured to provide a desired flame characteristic or profile from theburner 50 to the respectiveheat exchanger section 22. - The
gasket 60 is positioned between thedistributor 56—more specifically theentire burner 50—and theside 42 of thevestibule panel 40. Thegasket 60 includes a plurality ofopenings 62. Eachopening 62 is aligned with one of thesecond portions 58 on thedistributor 56 and one of thefirst openings 43 in thevestibule panel 40. Theopenings 62 are also each aligned with one of the inlet ends 24—more specifically theopenings 25 therein—of thesections 22 on theopposite side 44 of thevestibule panel 40. - Referring to
FIGS. 7A-7B , anoptional insulation sleeve 90 can be inserted into thefirst end 24 of eachheat exchanger section 22. Theinsulation sleeve 90 is tubular and includes apassage 91 extending between a pair ofopenings insulation sleeve 90 has an inner diameter Φ3 substantially equal to the first diameter Φ1 of thefirst portion 74 and a radial thickness “t”. Theinsulation 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 thesecond portion 76 of theheat exchanger section 22 until one end adjacent theopening 94 abuts or is in close proximity with theneck 78. The other end of theinsulation sleeve 90 adjacent theopening 92 is aligned with theopening 43 in thevestibule panel 40. Theinsulation sleeve 90 is held in place by friction with thesecond portion 76, theneck 78, and/or thegasket 60. As a result, theopenings insulation sleeve 90 are aligned with anopening 43 in thevestibule panel 40, anopening 62 in thegasket 60, and one of thesecond portions 58 of the burner 50 (seeFIG. 2B ). - The third diameter Φ3 and thickness t of the
insulation sleeve 90 are configured such that when the insulation sleeve is provided within thesecond section 76, the sleeve radially abuts thewall 70 and thesleeve passage 91 is longitudinally aligned with thefirst portion 74. As a result, there is no radial air gap between theinsulation sleeve 90 and thewall 70. The radially innermost structure within thesection 22—either theinsulation sleeve 90 material or thewall 70 inner surface of thefirst section 74—has a substantially constant diameter. - As shown in
FIG. 8 , in operation flames F emanating from eachsecond portion 58 extend through the associatedopening 62 of thegasket 60, theopening 43 in thevestibule panel 40, and into theopening 25 at theinlet end 24 of the associatedheat exchange section 22. The flames F are tailored such that the tip of each flame terminates at or adjacent to theopening 25 in theinlet end 24 of eachsection 22, i.e., the flames may barely extend into the interior of each tube and therefore barely extend into theinsulation sleeve 90. Alternatively, it will be appreciated that theinsulation sleeve 90 described herein can be omitted from one or more of the inlet ends 24 (seeFIG. 9 ) and, thus, the flame F would barely extend into thesecond portion 76 of theinlet end 24. - When the
burner 50 is a premixed burner, the very short flame F and rapid release of heat can cause thevestibule panel 40 and/or inlet ends 24 of theheat exchanger sections 22 to overheat. Thesleeve 90 of the present invention helps alleviate these overheating concerns by providing insulation within the inlet ends 24 of theheat exchanger sections 22. - In particular, 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 NOx burner 50. That said, the length of thesecond portion 76 and the length of theinsulation sleeve 90 can be tailored to provide a desired degree of temperature reduction/protection within theinlet end 24. Where the insulation sleeve is omitted inFIG. 9 , the expandedsecond portion 76 helps protect the smaller diameterfirst portion 74 by providing enough space near/around the flame such that thewall 70 is not damaged or heated beyond its rating/allowable limit. - Furthermore, an abrupt change in the inner diameter along the
inlet end 24 could cause overheating within the inlet end as well as turbulence for combustion products flowing therethrough. By providing theinlet end 24 of eachsection 22 with a substantially constant inner diameter Φ1 the abrupt diameter change is avoided and no increase in pressure occurs at the transition between theinsulation sleeve 90 and theneck 78. - What have been described above are examples of the present invention. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the present invention, but one of ordinary skill in the art will recognize that many further combinations and permutations of the present invention are possible. Accordingly, the present invention is intended to embrace all such alterations, modifications and variations that fall within the spirit and scope of the appended claims.
Claims (24)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US16/487,932 US20190368726A1 (en) | 2017-03-17 | 2018-03-19 | Heat exchanger |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US201762472842P | 2017-03-17 | 2017-03-17 | |
US16/487,932 US20190368726A1 (en) | 2017-03-17 | 2018-03-19 | Heat exchanger |
PCT/US2018/023160 WO2018170514A1 (en) | 2017-03-17 | 2018-03-19 | Heat exchanger |
Publications (1)
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US20190368726A1 true US20190368726A1 (en) | 2019-12-05 |
Family
ID=63523352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US16/487,932 Abandoned US20190368726A1 (en) | 2017-03-17 | 2018-03-19 | Heat exchanger |
Country Status (5)
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US (1) | US20190368726A1 (en) |
EP (1) | EP3596406A4 (en) |
CN (1) | CN110709646A (en) |
CA (1) | CA3055303A1 (en) |
WO (1) | WO2018170514A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD945579S1 (en) * | 2017-12-20 | 2022-03-08 | Rheem Manufacturing Company | Heat exchanger tube with fins |
US20220338675A1 (en) * | 2020-06-03 | 2022-10-27 | Hyper Fryer, LLC | High-Efficiency Heating Apparatus |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201900005518A1 (en) * | 2019-04-10 | 2020-10-10 | Apen Group S P A | Condensing heat exchanger with burner equipped with mixing and distribution chambers and a plurality of burner nozzles for parallel combustion pipes |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1894957A (en) | 1932-04-27 | 1933-01-24 | Babcock & Wilcox Co | Air heater |
US2527937A (en) * | 1948-08-10 | 1950-10-31 | Ferdinand H Klug | Hot-air furnace |
DE4005576A1 (en) | 1990-01-13 | 1991-09-26 | Andreas Ing Grad Veigel | Frictionally gripping plastic heat exchanger tube in plate |
US5178124A (en) * | 1991-08-12 | 1993-01-12 | Rheem Manufacturing Company | Plastic secondary heat exchanger apparatus for a high efficiency condensing furnace |
DE19520394A1 (en) * | 1995-06-08 | 1996-12-12 | Metallgesellschaft Ag | Method and device for rapidly cooling a hot gas mixture containing hydrogen and elemental sulfur |
US6006741A (en) * | 1998-08-31 | 1999-12-28 | Carrier Corporation | Secondary heat exchanger for condensing furnace |
US20100052318A1 (en) * | 2008-08-27 | 2010-03-04 | Woodward Governor Company | System and Method of Joining Fluid Transporting Tube and Header Using Internal Ferrule |
CA2706061A1 (en) * | 2009-06-03 | 2010-12-03 | Nordyne Inc. | Premix furnace and methods of mixing air and fuel and improving combustion stability |
US9316411B2 (en) * | 2012-07-20 | 2016-04-19 | Trane International Inc. | HVAC furnace |
US10995965B2 (en) * | 2013-01-25 | 2021-05-04 | Beckett Gas, Inc. | Ultra-low NOx burner |
CN103090534B (en) * | 2013-02-05 | 2015-05-27 | 张加清 | Hot blast stove |
US10107520B2 (en) * | 2014-07-15 | 2018-10-23 | Beckett Gas, Inc. | Heat exchanger coil for a recreational vehicle |
JP6397267B2 (en) * | 2014-08-22 | 2018-09-26 | 住友精密工業株式会社 | Heat exchanger |
US10544961B2 (en) * | 2016-02-18 | 2020-01-28 | Lennox Industries Inc. | Premix burner internal flue shield |
US10281143B2 (en) | 2017-01-13 | 2019-05-07 | Rheem Manufacturing Company | Pre-mix fuel-fired appliance with improved heat exchanger interface |
-
2018
- 2018-03-19 CA CA3055303A patent/CA3055303A1/en active Pending
- 2018-03-19 WO PCT/US2018/023160 patent/WO2018170514A1/en active Application Filing
- 2018-03-19 EP EP18768251.3A patent/EP3596406A4/en not_active Withdrawn
- 2018-03-19 CN CN201880017558.7A patent/CN110709646A/en active Pending
- 2018-03-19 US US16/487,932 patent/US20190368726A1/en not_active Abandoned
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD945579S1 (en) * | 2017-12-20 | 2022-03-08 | Rheem Manufacturing Company | Heat exchanger tube with fins |
USD960336S1 (en) * | 2017-12-20 | 2022-08-09 | Rheem Manufacturing Company | Heat exchanger tube with fins |
US20220338675A1 (en) * | 2020-06-03 | 2022-10-27 | Hyper Fryer, LLC | High-Efficiency Heating Apparatus |
US11712129B2 (en) * | 2020-06-03 | 2023-08-01 | Hyper Fryer, LLC | High-efficiency heating apparatus |
US20230404325A1 (en) * | 2020-06-03 | 2023-12-21 | Hyper Fryer, LLC | High-Efficiency Heating Apparatus |
Also Published As
Publication number | Publication date |
---|---|
CA3055303A1 (en) | 2018-09-20 |
WO2018170514A1 (en) | 2018-09-20 |
EP3596406A1 (en) | 2020-01-22 |
CN110709646A (en) | 2020-01-17 |
EP3596406A4 (en) | 2021-04-28 |
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