US20080093065A1 - Heat exchanger tube for heating system - Google Patents

Heat exchanger tube for heating system Download PDF

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Publication number
US20080093065A1
US20080093065A1 US11/774,459 US77445907A US2008093065A1 US 20080093065 A1 US20080093065 A1 US 20080093065A1 US 77445907 A US77445907 A US 77445907A US 2008093065 A1 US2008093065 A1 US 2008093065A1
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US
United States
Prior art keywords
heat exchanger
tube body
exchanger tube
ribs
lobes
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
Application number
US11/774,459
Inventor
Wai Kwan Cheung
Original Assignee
DONGGUAN GAOBAO ALUMINIUM MANUFACTORY COMPANY Ltd
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 DONGGUAN GAOBAO ALUMINIUM MANUFACTORY COMPANY Ltd filed Critical DONGGUAN GAOBAO ALUMINIUM MANUFACTORY COMPANY Ltd
Assigned to DONGGUAN GAOBAO ALUMINIUM MANUFACTORY COMPANY, LTD reassignment DONGGUAN GAOBAO ALUMINIUM MANUFACTORY COMPANY, LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Cheung, Wai Kwan
Publication of US20080093065A1 publication Critical patent/US20080093065A1/en
Assigned to Cheung, Wai Kwan reassignment Cheung, Wai Kwan ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DONGGUAN GAOBAO ALUMINIUM MANUFACTORY COMPANY, LTD.
Abandoned legal-status Critical Current

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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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/04—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular
    • 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
    • F28F1/26—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 the means being integral with the element
    • 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
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • 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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • 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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/422—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element with outside means integral with the tubular element and inside means integral with the tubular element
    • 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
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • 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

Abstract

The present invention discloses a heat exchanger tube for a heating system, which is suitable for any kinds of heating systems mounted in doors. The heat exchanger tube comprises a tube body, in which a plurality of lobes are formed on an outside surface of the tube body around the peripheral of the tube body and a plurality of ribs are formed on an outside surface of the tube body along the length of the tube body. Each of the ribs is inclined with respect to the longitude axis of the tube body by an angle of about 15 degree. The advantages of the present invention are in that: 1. the ribs could increase the heat exchanging surface; 2. the lobes could increase the heat radiating surface; and 3. as the heat exchanger tube is made of aluminum or aluminum alloy, the heating medium would not be polluted by rust generated in iron tubes.

Description

    CROSS-REFERENCE TO RELATED APPLICATION
  • This application claims priority benefit of China patent application No. 200610122946.0 filed on Oct. 24, 2006, the contents of which are hereby incorporated by reference in its entirety.
    • FIELD OF THE INVENTION
  • The present invention relates to a heating system, in particular to heat exchanger tubes used in a heating system.
    • BACKGROUND OF THE INVENTION
  • In the world, there are many countries or regions located in the temperate zone or the frigid zone. In winter, the temperature in those countries or regions is too low to bear even in doors. Traditionally, heating systems is provided in buildings, to raise the temperature in the rooms. According to the source of heat, the heating systems could be classified into the following types.
      • (A) An electrical power 8 supplies electrical energy to a heating resistance 7, and the heated resistance warms the air, as shown in FIG. 5.
      • (B) Natural gas 9 is burned in a furnace, and the burning natural gas 10 generates warm air 11, as shown in FIG. 6.
      • (C) Wood 12 is burned in a furnace, and the burning wood generates warm air 11, as shown in FIG. 7.
      • (D) Hot water is supplied to and passes through heat exchangers mounted in buildings, as shown in FIG. 8. In modern cities, the hot water is generally supplied from a central heating system, and the heat exchangers are all made of iron by means of welding. The hot water circulates in tubes of those heat exchangers and erodes the inside surface of the tubes, which would generate rust to pollute the hot water. The polluted hot water then flows back into the central heating system, which will pollute most of the heating containers in the central heating system. The central heating system and the heat exchangers could only be maintained in spring after the supply of hot water is suspended and the hot water in the tubes is discharged. In addition, the thermal impedance of iron is very high, for example, the thermal conductivity of iron is 72.1 when heating medium is in 100° C., which would incur energy waste and environmental pollution.
    SUMMARY OF THE INVENTION
  • The object of the present invention is to provide a heat exchanger tube for an existing heating system in the related art.
  • The present invention provides a heat exchanger tube, which comprises a tube body containing an inside surface exposed to a heating medium and an outside surface exposed to the air, wherein a plurality of lobes are formed on the outside surface of the tube body around the peripheral of the tube body.
  • Preferably, the lobes may be systematical with respect to a longitude axis of the tube body and each of the lobes may comprise a plurality of laminates in a laminated form. More preferably, a plurality of ribs may be formed on the inside surface of the tube body along the length of the tube body. Each of the ribs may be inclined with respect to a longitude axis of the tube body, and the inclination between each rib and the longitude axis of the tube body is preferably 15 degree. Thus, the ribs could be helically formed on the inside surface of the tube body to increase the heat-exchanging surface of the heat exchanger tube.
  • Preferably, the heat exchanger tube of the present invention may be made of aluminum or aluminum alloy.
  • The thermal impedance of the heat exchanger tube of the present invention is very low, for example, the thermal conductivity thereof is 173 when heating medium is in 100° C., which could greatly decrease energy consumption. In addition, as the aluminum or aluminum alloy tube will not generate rust, the heating medium would not be polluted by the rust, which will protect the environment in turn.
  • The advantages of the present invention are in that: 1. as a plurality of ribs are formed on the inside surface of the tube body and are inclined with respect to the longitude axis of the tube body, the heat exchanging surface would be increased; 2. as a plurality of laminated lobes are formed on the outside surface of the tube body, the heat radiating surface would be increased; 3. as the heat exchanger tube is made of aluminum or aluminum alloy, the heating medium would not be polluted by rust generated in iron tubes.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic view of the structure of the heat exchanger tube according to an embodiment of the present invention;
  • FIG. 2 is a vertical cross-sectional view of the heat exchanger tube according to the present invention;
  • FIG. 3 is a perspective view of the heat exchanger tube according to the present invention;
  • FIG. 4 is a schematic view of the utility of the heat exchanger tube according to the present invention;
  • FIG. 5 illustrates an electrical heating device in the related art;
  • FIG. 6 is a schematic view of natural gas burning furnace in the related art;
  • FIG. 7 is a schematic view of wood burning furnace in the related art; and
  • FIG. 8 is a schematic view of a heat exchange device for hot water in the related art.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • Reference will now be made in detail to the preferred embodiments of the invention, which is illustrated in the accompanying figures.
  • As shown in FIGS. 1-3, the heat exchanger tube of the present invention comprises a tube body 1, which includes an inside surface 3 exposed to a heating medium and an outside surface exposed to the air. The traversal cross section of the tube body could be in any suitable shape, such as a polygon, a circle, a rectangle and so on.
  • A plurality of lobes 2 are formed on the outside surface of the tube body 1 around the peripheral of the tube body 1. Preferably, each of the lobes 2 is formed along the whole length of the tube body 1. The lobes 2 could be formed by any means known in the related art. For example, the lobes 2 may be formed integrally with the tube body 1, or the lobes 2 could be formed by means of cutting the outside surface of the tube body 1. Preferably, the lobes 2 are systematical with respect to a longitude axis of the tube body 1.
  • As a preferred embodiment of the present invention, each lobe 2 may comprise a plurality of laminates to become in a laminated form. As mentioned above, the laminates of each lobe could be formed by any means known in the related art. For example, the laminates may be formed integrally with the tube body 1, or may be formed by means of cutting the lobes 2 after the later are formed.
  • As another preferred embodiment of the present invention, a plurality of ribs 4 may be formed on the inside surface 3 of the tube body 1 along the length of the tube body 1.
  • Preferably, each of the ribs 4 is inclined with respect to the longitude axis of the tube body 1, thus, each rib would be helically formed on the inside surface 3. More preferably, each rib 4 is inclined with respect to the longitude axis of the tube body 1 by an angle of about 15 degree.
  • The heat exchanger tube of the present invention may be made of any suitable material. Preferably, the heat exchanger tube may be made of aluminum or aluminum alloy.
  • The heat exchanger tubes of the present invention may be connected to a central heating system. As shown in FIG. 4, a plurality of heat exchanger tubes are provided between an inlet port 5 and an outlet port 6 of the heating system. A heating medium is supplied to the heat exchanger tube through the inlet port 5 and flows out of the heat exchanger tube via the outlet port 6. Thus, the heating medium inside the heat exchanger tubes could transfer heat to the air outside the heat exchanger tubes.
  • Although the description of the present invention is made with reference to the preferred embodiments, the present invention is not limited to these embodiments. Various modifications and changes can be made to the invention by those skilled in the art without departing from the spirit and scopes of the present invention.

Claims (12)

1. A heat exchanger tube for a heating system, comprising a tube body containing an inside surface exposed to a heating medium and an outside surface exposed to the air, wherein a plurality of lobes are formed on the outside surface of the tube body around the peripheral of the tube body.
2. The heat exchanger tube according to claim 1, wherein each of the lobes comprises a plurality of laminates in a laminated form.
3. The heat exchanger tube according to claim 1, wherein the lobes are systematical with respect to a longitude axis of the tube body.
4. The heat exchanger tube according to claim 2, wherein the lobes are systematical with respect to a longitude axis of the tube body.
5. The heat exchanger tube according to claim 1, wherein a plurality of ribs are formed on the inside surface of the tube body along the length of the tube body.
6. The heat exchanger tube according to claim 5, wherein each of the ribs is inclined with respect to a longitude axis of the tube body.
7. The heat exchanger tube according to claim 6, wherein each of the ribs is inclined with respect to the longitude axis of the tube body by an angle of 15 degree.
8. The heat exchanger tube according to claim 2, wherein a plurality of ribs are formed on an inside surface of the tube body along the length of the tube body.
9. The heat exchanger tube according to claim 8, wherein each of the ribs is inclined with respect to a longitude axis of the tube body.
10. The heat exchanger tube according to claim 9, wherein each of the ribs is inclined with respect to the longitude axis of the tube body by an angle of 15 degree.
11. The heat exchanger tube according to claim 1, wherein a plurality of said heat exchanger tubes are provided between an inlet port and an outlet port of the heating system for heating medium passing through.
12. The heat exchanger tube according to claim 1, wherein the heat exchanger tube is made of aluminum or aluminum alloy.
US11/774,459 2006-10-24 2007-07-06 Heat exchanger tube for heating system Abandoned US20080093065A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200610122946.0 2006-10-24
CNB2006101229460A CN100473937C (en) 2006-10-24 2006-10-24 High-tech aluminium composite pipe special for environment-friendly energy-saving heating system

Publications (1)

Publication Number Publication Date
US20080093065A1 true US20080093065A1 (en) 2008-04-24

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US11/774,459 Abandoned US20080093065A1 (en) 2006-10-24 2007-07-06 Heat exchanger tube for heating system

Country Status (3)

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US (1) US20080093065A1 (en)
JP (1) JP2008107076A (en)
CN (1) CN100473937C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103206887A (en) * 2013-03-27 2013-07-17 成都阳光铝制品有限公司 High density tooth heat radiator based on aluminum alloy
EP2876375A3 (en) * 2013-11-22 2015-09-02 Schluter Systems L.P. In-floor heating apparatuses
EP2781872B1 (en) * 2013-03-21 2022-01-19 Hamilton Sundstrand Corporation Heat exchanger design and fabrication
US11371785B2 (en) * 2020-07-10 2022-06-28 The Government of the United States of America, as represented by the Secretarv of the Navy Cooling system and fabrication method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5646257B2 (en) * 2010-09-08 2014-12-24 東芝キヤリア株式会社 Refrigeration cycle equipment
CN106767028A (en) * 2016-11-29 2017-05-31 无锡市锡源锅炉有限公司 A kind of band is except the boiler smoke-gas residual-heat recovering device of smoked sheet

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US2978797A (en) * 1954-02-22 1961-04-11 Svenska Metallverken Ab Tubular finned metal sections and manufacture thereof
US3866286A (en) * 1973-07-02 1975-02-18 Peerless Of America Method of making a finned tube heat exchanger having a circular cross section
US4044797A (en) * 1974-11-25 1977-08-30 Hitachi, Ltd. Heat transfer pipe
US4657074A (en) * 1985-02-27 1987-04-14 Diesel Kiki Co., Ltd. Heat exchanger for combustion heater
US4705103A (en) * 1986-07-02 1987-11-10 Carrier Corporation Internally enhanced tubes
US4724901A (en) * 1980-05-19 1988-02-16 Showa Aluminum Kabushiki Kaisha Device for releasing heat
US4960170A (en) * 1989-01-26 1990-10-02 Carter James I Finned tube and method of making the same
US5732767A (en) * 1996-01-24 1998-03-31 Modine Manufacturing Co. Corrosion resistant heat exchanger and method of making the same
US20030094272A1 (en) * 2001-11-16 2003-05-22 Karine Brand Heat-exchanger tube structured on both sides and a method for its manufacture
US6928833B2 (en) * 2001-10-22 2005-08-16 Showa Denko K.K. Finned tube for heat exchangers, heat exchanger, process for producing heat exchanger finned tube, and process for fabricating heat exchanger

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JPS4957444A (en) * 1972-10-03 1974-06-04
JPS53141423U (en) * 1977-04-15 1978-11-08
JPH0387075U (en) * 1989-12-14 1991-09-04
JPH10281676A (en) * 1997-04-04 1998-10-23 Hitachi Cable Ltd Production of heat exchanger
JP2003240485A (en) * 2002-02-14 2003-08-27 Hitachi Cable Ltd Heat transfer tube with internal groove
JP2003254626A (en) * 2002-03-05 2003-09-10 Matsushita Electric Ind Co Ltd Heat exchanger

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2978797A (en) * 1954-02-22 1961-04-11 Svenska Metallverken Ab Tubular finned metal sections and manufacture thereof
US3866286A (en) * 1973-07-02 1975-02-18 Peerless Of America Method of making a finned tube heat exchanger having a circular cross section
US4044797A (en) * 1974-11-25 1977-08-30 Hitachi, Ltd. Heat transfer pipe
US4724901A (en) * 1980-05-19 1988-02-16 Showa Aluminum Kabushiki Kaisha Device for releasing heat
US4657074A (en) * 1985-02-27 1987-04-14 Diesel Kiki Co., Ltd. Heat exchanger for combustion heater
US4705103A (en) * 1986-07-02 1987-11-10 Carrier Corporation Internally enhanced tubes
US4960170A (en) * 1989-01-26 1990-10-02 Carter James I Finned tube and method of making the same
US5732767A (en) * 1996-01-24 1998-03-31 Modine Manufacturing Co. Corrosion resistant heat exchanger and method of making the same
US6928833B2 (en) * 2001-10-22 2005-08-16 Showa Denko K.K. Finned tube for heat exchangers, heat exchanger, process for producing heat exchanger finned tube, and process for fabricating heat exchanger
US20030094272A1 (en) * 2001-11-16 2003-05-22 Karine Brand Heat-exchanger tube structured on both sides and a method for its manufacture

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2781872B1 (en) * 2013-03-21 2022-01-19 Hamilton Sundstrand Corporation Heat exchanger design and fabrication
CN103206887A (en) * 2013-03-27 2013-07-17 成都阳光铝制品有限公司 High density tooth heat radiator based on aluminum alloy
EP2876375A3 (en) * 2013-11-22 2015-09-02 Schluter Systems L.P. In-floor heating apparatuses
US11371785B2 (en) * 2020-07-10 2022-06-28 The Government of the United States of America, as represented by the Secretarv of the Navy Cooling system and fabrication method thereof

Also Published As

Publication number Publication date
CN100473937C (en) 2009-04-01
JP2008107076A (en) 2008-05-08
CN1967134A (en) 2007-05-23

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AS Assignment

Owner name: DONGGUAN GAOBAO ALUMINIUM MANUFACTORY COMPANY, LTD

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHEUNG, WAI KWAN;REEL/FRAME:019528/0421

Effective date: 20070620

AS Assignment

Owner name: CHEUNG, WAI KWAN, CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DONGGUAN GAOBAO ALUMINIUM MANUFACTORY COMPANY, LTD.;REEL/FRAME:022139/0634

Effective date: 20081210

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION