EP1800068B1 - Heat exchanger for common use for boiler and hot water supply - Google Patents

Heat exchanger for common use for boiler and hot water supply Download PDF

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Publication number
EP1800068B1
EP1800068B1 EP05789794.4A EP05789794A EP1800068B1 EP 1800068 B1 EP1800068 B1 EP 1800068B1 EP 05789794 A EP05789794 A EP 05789794A EP 1800068 B1 EP1800068 B1 EP 1800068B1
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EP
European Patent Office
Prior art keywords
heat exchanger
heat
combustion
tubes
inner plate
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.)
Not-in-force
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EP05789794.4A
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German (de)
English (en)
French (fr)
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EP1800068A1 (en
Inventor
Young Mo Kim
Sung Geun 611-1303 Jukong Apt. KIM
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Kyungdong Navien Co Ltd
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Kyungdong Navien Co Ltd
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Publication date
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Priority to PL05789794T priority Critical patent/PL1800068T3/pl
Publication of EP1800068A1 publication Critical patent/EP1800068A1/en
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Publication of EP1800068B1 publication Critical patent/EP1800068B1/en
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Classifications

    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • 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
    • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • 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
    • F28D7/02—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 helically coiled
    • F28D7/024—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 helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
    • 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
    • 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
    • F28D7/085—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 in the form of parallel conduits coupled by bent portions
    • 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
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core

Definitions

  • the present invention relates to a heat exchanger for common use for a boiler and a hot water supply according to the preamble of claim 1.
  • the invention relates more particularly to a heat exchanger for common use for a boiler and a hot water supply in which a combustion chamber and a common heat exchanger an be used in common when manufacturing a non-condensing, semi-condensing and condensing boiler, to thereby make it possible to manufacture the non-condensing, semi-condensing and condensing boiler.
  • a boiler for use in general homes and buildings is used for heating rooms and supplying hot water, which is divided into a fuel oil boiler and a fuel gas boiler, according to a type of fuel used.
  • a gas fuel boiler liquified petroleum gas (LPG) has been being used, but liquified natural gas (LNG) is being used since LNG contains few sulphuric component in comparison with LPG, to thus minimize an air pollution.
  • LPG liquified petroleum gas
  • LNG liquified natural gas
  • a gas boiler can be divided into a variety of types according to a control method or a sealing state thereof. Further, a gas boiler can be classified into a condensing gas boiler and a non-condensing gas boiler according to a method of re-collecting heat sources heating water.
  • the US 6,662,758 B1 shows such a condensing gas boiler, which recollects condensed latent heat by uptrend combustion, is provided.
  • Latent heat exchangers are disposed in the same area as that of a combustion chamber, and perpendicular with the combustion chamber.
  • An exhaust gas guiding member is installed so that the exhaust gas is collected into a place in the rear portion of a latent heat portion to then pass trough the latent heat exchangers.
  • the latent exchangers are installed slantly in such a manner that the re-absorption of the condensed latent heat can be done in the latent heat exchangers.
  • a heat exchanger for use in such a condensing boiler includes a combustion heat exchanger 29 which heats water directly using heat from a burner 10, and a latent heat exchanger 28 which heats water indirectly using latent heat of an exhaust gas passing through the combustion heat exchanger 29.
  • a condensed water basin 32 which externally guides condensed water due to an exhaust gas is provided between the combustion heat exchanger 29 and the latent heat exchanger 28.
  • a guide plate 33 slants at the same angle as the condensed water basin 32.
  • An exhaust gas discharge portion 36 is formed in opposition to the exhaust gas inlet 31.
  • the exhaust gas passing through the combustion heat exchanger 29 flows in via one side of the latent heat exchanger 28 by the condensed water basin 32, passes through latent fin tubes 28', and is discharged via an exhaust gas outlet 37 in an exhaust gas discharge portion 36. Accordingly, heat can be transferred toward the latent heat exchanger 28 for a sufficient time.
  • a heat exchanger 30 is directly heated by combustion of a burner 10, and an exhaust gas is discharged via an exhaust gas outlet 37.
  • the non-condensing heat exchanger 30 is generally made of a copper material whose heat transfer rate is excellent. Since a high heat efficiency is pursued due to an energy policy and a control technology is developed, the non-condensing heat exchanger is designed to suppress condensation at maximum. However, a condensation phenomenon cannot be prevented from occurring partially or temporarily, which causes the heat exchanger to be corroded.
  • the heat exchanger of the condensing boiler shown in FIGs. 1 and 2 differs in its construction from that of the non-condensing boiler shown in FIGs. 3 and 4 , due to respectively different heat absorption methods.
  • the invention enables a manufacturer to selectively manufacture a condensing boiler, a semi-condensing boiler and a non-condensing boiler at low cost, to thus save a development period, a manufacturing cost, and a management cost after mass-production, relatively in comparison with those of a conventional heat exchanger, in which a latent heat exchanger or a non-condensing heat exchanger (called an auxiliary heat exchanger) is combined on the upper end of the common heat exchanger which can be commonly used for manufacturing the condensing boiler, the semi-condensing boiler, and the non-condensing boiler.
  • a latent heat exchanger or a non-condensing heat exchanger called an auxiliary heat exchanger
  • the inventive heat exchanger for common use for a boiler and a hot water supply is made of a corrosion-resistant material and a hybrid metal corrosion-preventive structure and includes a condensed water basin as necessary.
  • the heat exchanger for common use for a boiler and a hot water supply has a structure of making an exhaust gas smoothly flow in which a latent heat exchanger is combined on the upper portion of the common heat exchanger when a condensing boiler is manufactured using the common heat exchanger and a duct is installed between the common heat exchanger and the condensing boiler, and which has a structure of regulating a flow of gas in which a non-condensing heat exchanger and a latent heat exchanger which are combined on the upper portion of the common heat exchanger have an identical same gas flow direction each other.
  • a heat exchanger for a condensing and non-condensing gas boiler can be manufactured with a common heat exchanger according to the present invention. Accordingly, the heat exchanger for a gas boiler can be manufactured at low cost. Also, since two kinds of heat exchangers can be manufactured with a common heat exchanger, an additional process is not necessary.
  • a non-condensing boiler adopting a common heat exchanger according to the present invention has a high efficiency.
  • FIGs. 1 and 2 arc a perspective view and a cross-sectional view showing a conventional condensing heat exchanger, respectively:
  • FIGs. 3 and 4 arc a perspective view and a cross-sectional view showing a conventional non-condensing heat exchanger, respectively:
  • FIG. 5 is a perspective view showing a common heat exchanger according to the present invention.
  • FIG. 6 is an exploded perspective view showing a common heat exchanger according to the present invention:
  • FIG. 7 is an exploded perspective view showing a common heat exchanger of FIG. 6 which additionally has an outer cover according to another embodiment of the present invention.
  • FIG. 8 is a perspective view showing an example of a condensing heat exchanger to which the common heat exchanger shown in FIG. 7 according to the present invention is applied;
  • FIG. 9 is an exploded perspective view showing the condensing heat exchanger shown in FIG. 8 according to the present invention.
  • FIG. 10 is an exploded perspective view showing only a latent heat exchanger separated from the condensing heat exchanger shown in FIG. 8 according to the present invention.
  • FIG. 11 is an exploded perspective view showing the latent heat exchanger shown in FIG. 10 according to the present invention.
  • FIG. 12 is a cross-sectional view showing the condensing heat exchanger shown in FIG. 8 according to the present invention.
  • FIG. 13 is a perspective view showing an example of a non-condensing heat exchanger to which the common heat exchanger shown in FIG. 7 according to the present invention is applied;
  • FIG. 14 is an exploded perspective view showing the non-condensing heat exchanger shown in FIG. 13 according to the present invention.
  • FIG. 15 is a cross-sectional view showing the non-condensing heat exchanger shown in FIG. 13 according to the present invention.
  • a heat exchanger for common use for a boiler and a hot water supply comprising: a plurality of inner plate members having inner plate member grooves formed on either side of the upper end thereof, and a burner provided on the bottom surface thereof, to thereby perform a combustion chamber function: combustion heat fin tubes formed of a number of heat exchange tubes on the outer circumferential surface of which transfer heat fins arc formed so that a heat exchange is performed by hot water flows in the transfer heat fins in which the combustion heat fin tubes arc mounted into the inner plate member grooves provided in the inner plate member; a heat insulation member which is installed in an identical area along the inner walls of the inner plate members; and an independent heat exchanger body which is connected with the combustion heat fin tubes so that hot water can flow and is formed of a plurality of water tubes wound on the outer circumferential surfaces of the inner plate members.
  • an outer cover is further installed at the outermost portion of the heat exchanger body so as to surround the plurality of water tubes wound on the outer circumferential surfaces of the inner plate members.
  • a structure of a condensing boiler is formed in the case that a latent heat exchanger having latent fin tubes absorbing latent heat in the latent heat exchanger body is independently combined on the upper portion of the heat exchanger body.
  • a duct is formed between the heat exchanger body and the latent heat exchanger to thus make an exhaust gas smoothly flow.
  • a structure of a non-condensing boiler having a relatively high output capacity is formed in the case that an auxiliary heat exchanger absorbing only combustion heat is independently combined on the upper portion of the heat exchanger body.
  • FIG. 5 is a perspective view showing a common heat exchanger according to the present invention.
  • FIG. 6 is an exploded perspective view showing a common heat exchanger according to the present invention.
  • FIG. 7 is an exploded perspective view showing a common heat exchanger of FIG. 6 which additionally has an outer cover according to another embodiment of the present invention.
  • a common heat exchanger 1 largely includes a plurality of inner plate members 110, combustion heat fin tubes 120, a heat insulation member 130, and water tubes 140, all of which are formed as an independent heat exchanger body 100.
  • the inner plate members 110 perform a combustion chamber function as in a conventional heat exchanger.
  • the inner plate members. 110 has a rectangular box structure having a hurner (not shown) which hums air and gas inhaled by operation of a blower (not shown) provided on the bottom surface thereof, and a plurality of inner plate member grooves 111 into which the plurality of combustion heat fin tubes 120 are assembled on both sides of the upper end thereof, to thereby perform a combustion chamber function in a boiler.
  • windows 112 can be provided on the inner plate members 110 so that a user can monitor a burning flame from the outside of the heat exchanger.
  • the combustion heat fin tubes 120 are formed of a number of heat exchange tubes on the outer circumferential surface of which transfer heat fins are formed so that a heat exchange is performed by hot water flows in the transfer heat fins. It is preferable that the combustion heat fin tubes 120 are made of a copper material whose heat transfer rate is excellent as in a conventional heat exchanger in a conventional gas boiler, and it is manufactured to have a structure of contacting combustion heat due to combustion of the burner as a number of times as possible.
  • combustion heat fin tubes 120 One end of the combustion heat fin tubes 120 is connected with a hot water supply tube (not shown) of a gas boiler and the other end thereof is connected with a fin tube of a latent heat exchanger 53 or a non-condensing heat exchanger to be described later.
  • the combustion heat fin tubes 120 are connected in zigzag form via U-shaped tubes 121. Accordingly, the plurality of the combustion heat fin tubes 120 form a single long tube so that water flowing therein is heat-exchanged with the combustion heat, to thus perform a combustion chamber function.
  • the U-shaped tubes 121 are made of the same material as that of the combustion heat fin tubes 120 in order to prevent a corrosion occurring in hybrid metal between the U-shaped tubes 121 and the combustion heat fin tubes 120.
  • the hot water which flows in via one end of the combustion heat fin tubes 120 from the hot water supply tube flows along the respective combustion heat fin tubes 120 via the U-shaped tubes 121 so as to be heat-exchanged with the combustion heat from the burner for a long time.
  • a heat insulation member 130 is installed in the inner plate members 110 in order to isolate combustion heat from being discharged out via the inner plate members 110 in the case that combustion occurs in the inside of the inner plate members 110.
  • the insulation material 130 is provided over the whole inner walls of the inner plate members 110, the insulation member 130 is installed in the inner walls of the inner plate members 110 in the same area and substantially same structure as those of the inner plate members 110.
  • a plurality of water tubes 140 connected with the combustion heat fin tubes 120 arc wound on the outer circumferential surfaces of the inner plate members 110, in order to absorb the combustion heat discharged from the inner plate members 110 as much as possible, to thus enhance a heat efficiency.
  • an outer cover 150 is further installed at the outermost portion of the heat exchanger body so as to surround the plurality of water tubes 140 wound on the outer circumferential surfaces of the inner plate members 110.
  • the outer cover 150 has a structure of the same shape as that of the inner plate members 110, like the insulation member 130.
  • the outer cover 150 can absorb heat discharged from the combustion chamber via the inner plate members 110 to a degree using a material of metal, and isolate the outer portions of the inner plate members 110 from users to thereby protect them safely from contacting the hot portions. Further, the outer cover 150 does not expose the water tubes 140 wound on the outer walls of the inner plate members 110, to thereby play a role of making an external countenance look good.
  • the water tubes 140 wound on the outer walls of the inner plate members 110 can absorb the high-temperature combustion heat to thus primarily heat-exchange with the combustion heat, and simultaneously isolate heat discharged from the outer cover 150 to further prevent a thermal loss.
  • the outer cover 150 absorbs a relatively small amount of heat, the surface temperature of the outer cover 150 is remarkably lowered. Although users get in touch with the outer cover 150, a danger of a burn can be reduced.
  • a burner is provided on the bottom surface of the inner plate members 110, and then the combustion heat fin tubes 120 arc assembled with a plurality of inner plate member grooves 111 provided on either side of the upper end of the inner plate members 110. Then, the plurality of combustion heat fin tubes 120 are connected via U-shaped tubes 121 excluding one end and the other end of the plurality of the combustion heat fin tubes 120.
  • a condensing gas boiler or non-condensing boiler can be manufactured as desired.
  • FIG. 8 is a perspective view showing an example of a condensing heat exchanger to which the commun heat exchanger shown in FIG. 7 according to the present invention is applied.
  • FIG. 9 is an exploded perspective view showing the condensing heat exchanger shown in FIG. 8 according to the present invention.
  • FIG. 10 is an exploded perspective view showing only a latent heat exchanger separated from the condensing heat exchanger shown in FIG. 8 according to the present invention.
  • FIG. 11 is an exploded perspective view showing the latent heat exchanger shown in FIG. 10 according to the present invention.
  • FIG. 12 is a cross-sectional view showing the condensing heat exchanger shown in FIG. 8 according to the present invention.
  • a latent heat exchanger 2 which can absorb latent heat from an exhaust gas is independently combined on the upper portion of a common heat exchanger 1 according to the present invention, to thus form a condensing heat exchanger.
  • a separate duct 300 is formed between the common heat exchanger I and the latent heat exchanger 2 to thus make an exhaust gas smoothly flow in the case that the latent heat exchanger 2 is combined with the common heat exchanger 1.
  • the duct 300 is combined on the upper portion of the combustion heat fin tubes 120 in the common heat exchanger 1.
  • the duct 300 includes an exhaust gas outlet 303 through which an exhaust gas having passed through the combustion heat fin tubes 120 is discharged and which is provided on part of the upper surface 301 thereof, and an inclined surface 302 provided in opposition to the exhaust gas outlet 303.
  • the latent heat exchanger body 200 of the latent heat exchanger 2 is combined on the duct 300.
  • the bottom surface of the latent heat exchanger body 200 has a structure corresponding to the upper surface 301 and the inclined surface 302 of the duct 300, and has an exhaust gas inlet 201 in correspondence to the same position as that of the exhaust gas outlet 303.
  • a condensed water outlet 202 through which condensed water formed due to the exhaust gas is discharged is provided on the lowermost end of the bottom surface of the latent heat exchanger body 200.
  • a plurality of latent heat fin tubes 210 through which hot water flows are provided in the latent heat exchanger body 200.
  • the latent heat fin tubes 210 perform a heat exchange like the combustion heat fin tubes 120 in the common heat exchanger 1, and are preferably made of a corrosion-resistant material such as aluminum and stainless steel, to thereby prevent corrosion duc to condensation. More preferably, the latent heat fin tubes 210 arc made of a plurality of tubes each having a double structure, in which a copper tube is inserted into the inside of an aluminum tube whose cost is lower than that of the cooper tube, differently from the combustion heat fin tubes 120 which are made of copper tubes.
  • the latent heat fin tubes 210 arc filled with separate lateral plates 220 which cover the lateral surfaces of the latent heat exchanger body 200, and arc connected with each other by U-shaped tubes 221, to thereby form a single tube through which hot water can flow.
  • the latent heat fin tubes 210 are connected with the combustion heat fin tubes 120 and a hot water inlet tube (not shown) both which are positioned below the latent heat fin tubes 210, through connection tubes 222 and 223.
  • hot water having flown in from the connection tube 223 through the unshown hot water inlet tube flows through the plurality of latent heat fin tubes 210 for a long time, and then flows out to the combustion heat fin tubes 120 via the other connection tube 222, to accordingly perform a heat exchange through the high-temperature exhaust gas and the combustion heat.
  • an exhaust gas tower 230 forming the latent heat exchanger I generally is provided on the upper ends of the latent heat exchanger body 200 and the lateral plates 220.
  • the exhaust gas tower 230 includes an exhaust gas outlet 231 for discharging an exhaust gas on the upper end thereof.
  • a guide plate 240 which guides a flow of the exhaust gas so that an exhaust gas can flow over the whole of the plurality of latent heat fin tubes 210 and firmly fixes the latent heat fin tubes 210 is provided between the latent heat fin tubes 210 and the exhaust gas tower 230.
  • the guide plate 240 is formed to have the same inclination as those of the latent heat fin tubes 210 which are slantedly installed in the latent heat exchanger body 200.
  • a packing 170 made of rubber is provided between the inner plate members 110 with which the combustion heat fin tubes 120 are fitted and the duct 300, to thereby enable the upper sides of the inner plate members 110 and the lower side of the duct 300 to be connected with each other stably while maintaining a sealing capability.
  • FIG. 13 is a perspective view showing an example of a non-condensing heat exchanger to which the common heat exchanger shown in FIG. 7 according to the present invention is applied.
  • FIG. 14 is an exploded perspective view showing the non-condensing heat exchanger shown in FIG. 13 according to the present invention.
  • FIG. 15 is a cross-sectional view showing the non-condensing heat exchanger shown in FIG. 13 according to the present invention.
  • a non-condensing boiler shown in FIG. 13 has an auxiliary heat exchanger having a relatively small capacity installed in a common heat exchanger according to the present invention.
  • the auxiliary heat exchanger which absorbs only combustion heat can suppl ement an output capacity which is insufficient with only a common heat exchanger.
  • an auxiliary heat exchanger 3 which absorbs only combustion heat is mounted on the common heat exchanger 1 according to the present invention, to thereby form a non-condensing heat exchanger.
  • the non-condensing heat exchanger has a structure in which a cover-shaped exhaust gas duct 160 is installed on the inner plate members 110 in the common heat exchanger 1, and auxiliary combustion heat fin tubes 310 are installed between the exhaust gas duct 160 and the combustion heat fin tubes 120 on the upper end surfaces of the inner plate members 110.
  • An exhaust gas outlet 161 is provided in the exhaust gas duct 160 formed on the upper portion of the auxiliary heat exchanger 3.
  • a plurality of inner plate member grooves 111 are provided on both sides of the upper ends of inner plate members 110.
  • a plurality of combustion heat fin tubes 120 which heat water through heat exchanging with combustion heat arc mounted into the inner plate member grooves 111 which are then tightly assembled with a separate lateral plate 180.
  • combustion heat fin tubes 120 are preferably made of a form rolling fin structure where fins arc form rolled on a tube made of copper, respectively.
  • the fins on the combustion heat fin tubes 120 can be combined on the outer circumferential surface of the tubes through a well-known brazing weld.
  • the auxiliary combustion heat fin tubes 310 installed on the upper portion of the combustion heat fin tubes 120 arc mounted between the upper end of the lateral plate 180 and exhaust gas duct grooves 162 in the exhaust gas duct 160.
  • auxiliary combustion heat fin tubes 310 are preferably made of a form rolling fin structure where fins are form rolled on a tube made of aluminum which is cheap and has a good corrosion-resistant capability in comparison with copper, respectively.
  • the fins provided on the outer circumferential surfaces of the tubes can be also formed of a well-known general fin structure, not a form rolling fin structure.
  • the combustion heat fin tubes 120 whose exhaust gas temperature is high are made of copper in order to prevent damage due to high temperature, while the auxiliary combustion heat fin tubes 310 whose exhaust gas temperature is relatively low are made of aluminum. In this manner, the heat exchanger according to the present invention can be manufactured at low cost.
  • the auxiliary combustion heat fin tubes 310 are connected with each other by means of U-shaped tubes 311, respectively, according to a conventional method.
  • the auxiliary combustion heat fin tubes 310 and the combustion heat fin tubes 120 are connected with each other via connection tubes 312, respectively.
  • the lateral plate 180 combined with both sides of the upper portion of the inner plate members 110 is separately manufactured from the inner plate members 110 and plays a role of fixing and supporting the combustion heat fin tubes 120 and the auxiliary combustion heat fin tubes 310 together with the inner plate members 110 and the exhaust gas duct 160.
  • the combustion heat fin tubes 120 and the auxiliary combustion heat fin tubes 310 are assembled with each other between the common heat exchanger 1 and the auxiliary heat exchanger 3, by means of the lateral plate 180, the number of connection portions is reduced to thereby reliably maintain air-tightness of the heat exchanger.
  • a packing 170 is provided between the inner plate members 110 where the combustion heat fin tubes 120 are fitted and the auxiliary heat exchanger 3. Accordingly, the upper sides of the inner plate members 110 and the lower sides of the auxiliary heat exchanger 3 can be stably combined with each other while maintaining air-tightness.
  • the number of the auxiliary combustion heat fin tubes 310 is generally smaller than that of the combustion heat fin tubes 120.
  • the exhaust gas duct 160 has a structure that the volume of the duct is reduced upwards. As a result, the number of the auxiliary combustion heat fin tubes 310 can be reduced and simultaneously a flow of the exhaust gas can be stably guided in the direction of the exhaust gas outlet 161.
  • the non-condensing heat exchanger can be simply assembled.
  • the water which is primarily heated by the combustion heat fin tubes 120 flows toward the auxiliary combustion heat fin tubes 310 via the connection tubes 312, and then is secondarily heated by the exhaust gas.
  • the water in the lower-side combustion heat fin tubes 120 is heated by combustion heat of the burner 10 via the heat exchanger to which the common heat exchanger in the gas boiler according to the present invention is applied, and then the water in the upper-side auxiliary combustion heat fin tubes 310 is heated.
  • combustion heat fin tubes 120 play a role of a main heat exchanger
  • auxiliary combustion heat fin tubes 3 10 play a role of an auxiliary heat exchanger.
  • the non-condensing gas boiler absorbs only combustion heat in the combustion chamber in order to perform heat exchange.
  • the common heat exchanger of the gas boiler according to the present invention can be applied to a downstream combustion gas boiler having a burner which is provided in the upper portion thereof.
  • the common heat exchanger according to the present invention can be applied to a general gas boiler in which a gas boiler and a conventional heat exchanger are integrated. That is, the integrated heat exchanger is divided into several heat exchangers and then part of the divided heat exchangers are made of conventional copper heat exchangers and the rest of the divided heat exchangers are made of corrosion-resistant heat exchangers, in which condensed water basin is installed.
  • a heat exchanger of a form rolling fin structure according to the present invention can be made by brazing fins on a copper tube, a double tube of a copper tube and an aluminum tube, or a stainless steel tube.
  • a heat exchanger structure can be easily varied and modified.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details Of Fluid Heaters (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
EP05789794.4A 2004-10-13 2005-03-19 Heat exchanger for common use for boiler and hot water supply Not-in-force EP1800068B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05789794T PL1800068T3 (pl) 2004-10-13 2005-03-19 Wymiennik ciepła do zastosowania w kotle i w zasilaniu gorącą wodą

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KR1020040081928A KR100570291B1 (ko) 2004-10-13 2004-10-13 보일러/급탕기용 공용열교환기
PCT/KR2005/000805 WO2006041244A1 (en) 2004-10-13 2005-03-19 Heat exchanger for common use for boiler and hot water supply

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EP1800068B1 true EP1800068B1 (en) 2013-05-15

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JP (1) JP2007517180A (pl)
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Also Published As

Publication number Publication date
KR100570291B1 (ko) 2006-04-11
US20070204980A1 (en) 2007-09-06
JP2007517180A (ja) 2007-06-28
EP1800068A1 (en) 2007-06-27
PL1800068T3 (pl) 2013-10-31
CN100451526C (zh) 2009-01-14
CN1910408A (zh) 2007-02-07
WO2006041244A1 (en) 2006-04-20

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