WO2008018712A1 - Plastic heat exchanger and method of manufacturing the same - Google Patents

Plastic heat exchanger and method of manufacturing the same Download PDF

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Publication number
WO2008018712A1
WO2008018712A1 PCT/KR2007/003674 KR2007003674W WO2008018712A1 WO 2008018712 A1 WO2008018712 A1 WO 2008018712A1 KR 2007003674 W KR2007003674 W KR 2007003674W WO 2008018712 A1 WO2008018712 A1 WO 2008018712A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
fusion
header
melted material
exchanger tube
Prior art date
Application number
PCT/KR2007/003674
Other languages
French (fr)
Inventor
Eon-Seok Lee
Ho-Geun Ryu
Du-Soon Choi
Sang-Hoon Han
Original Assignee
Lg Chem, 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 Lg Chem, Ltd. filed Critical Lg Chem, Ltd.
Priority to CN200780029912XA priority Critical patent/CN101501436B/en
Priority to EP07793329.9A priority patent/EP2049861B1/en
Priority to BRPI0716653-2A priority patent/BRPI0716653B1/en
Priority to US12/310,153 priority patent/US8966757B2/en
Priority to MX2009001577A priority patent/MX2009001577A/en
Priority to JP2009523709A priority patent/JP4999927B2/en
Publication of WO2008018712A1 publication Critical patent/WO2008018712A1/en

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Classifications

    • 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
    • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
    • 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
    • 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
    • F28D1/053—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 straight
    • F28D1/05316—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05333—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
    • 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
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/062—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits
    • 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
    • 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
    • F28F9/187—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding at least one of the parts being non-metallic, e.g. heat-sealing plastic elements
    • 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
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/007—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/14—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes molded
    • F28F2255/143—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes molded injection molded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/16—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes extruded
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49401—Fluid pattern dispersing device making, e.g., ink jet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49428—Gas and water specific plumbing component making
    • Y10T29/49432—Nozzle making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49428—Gas and water specific plumbing component making
    • Y10T29/49432—Nozzle making
    • Y10T29/49433—Sprayer

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

Disclosed is a plastic heat exchanger in which, when a heat exchanger tube of the plastic heat exchanger is coupled to a header, the heat exchanger tube and a junction portion of the header are melted and pressed simultaneously through a heat fusion jig including a fusion portion and a fusion valley so as to secure reliability against leakage of refrigerant, and a method of manufacturing the same, by which the plastic heat exchanger can be mass-produced at low fabricating cost through simple processes. The present invention provides a method of fabricating a plastic heat exchanger, comprising a step of melting and pressing a plastic heat exchanger tube and a junction of a header by using a heat fusion jig, and a plastic heat exchanger fabricated by the method, thereby securing reliability against leakage of refrigerant, having heat exchange performance more excellent than or equal to a metallic heat exchanger and also mass-producing the plastic heat exchanger at low fabricating cost through simple processes.

Description

Description
PLASTIC HEAT EXCHANGER AND METHOD OF MANUFACTURING THE SAME
Technical Field
[1] The present invention relates to a plastic heat exchanger and a method of manufacturing the same, and particularly, to a plastic heat exchanger in which, when a heat exchanger tube of the plastic heat exchanger is coupled to a header, the heat exchanger tube and a junction portion of the header are melted and pressed simultaneously through a heat fusion jig including a fusion portion and a fusion valley so as to secure reliability against leakage of refrigerant, thereby having heat exchange performance more excellent than or equal to a metallic heat exchanger, and a method of manufacturing the same, by which the plastic heat exchanger can be mass-produced at low fabricating cost through simple processes. Background Art
[2] In a general heat exchanger, as shown in Fig. 1, a heat exchanger fin 3 is attached to an external side of a metallic heat exchanger tube including a refrigerant inlet pipe 1 and a refrigerant outlet pipe 2 to improve heat transfer, and a header made of a metallic material is coupled to left and right sides of the metallic heat exchanger tube to fix the heat exchanger. The heat exchanger is made of an expensive metallic material such as aluminum alloy, copper and the like and fabricated through complicated processes, thereby increasing fabrication time and cost. Thus, it is difficult to mass-produce the heat exchanger.
[3] Meanwhile, in order to solve the problem, there was proposed a joint method between a tube and a tube header for a plastic heat exchanger (Korean Patent No. 10-0366430), in which the heat exchanger was made of a plastic material and the tube and header were fused to each other by an inverted triangular mold using heat fusion. However, in this method, because the tube and header are not fused integrally to each other with deformation of their original shapes, but simply joined by heat of the mode using heat fusion, it is difficult to maintain airtightness of refrigerant which is essentially required in the heat exchanger, and thus because it is impossible to maintain a refrigerant pressure of a condenser in a refrigeration cycle and also the refrigeration cycle is not formed normally, thereby deteriorating performance of the heat exchanger. Disclosure of Invention Technical Problem
[4] An object of the present invention is to provide a plastic heat exchanger in which, when a heat exchanger tube of the plastic heat exchanger is coupled to a header, the heat exchanger tube and a junction portion of the header are melted and pressed simultaneously through a heat fusion jig including a fusion portion and a fusion valley so as to secure reliability against leakage of refrigerant, thereby having heat exchange performance more excellent than or equal to a metallic heat exchanger, and a method of manufacturing the same, by which the plastic heat exchanger can be mass-produced at low fabricating cost through simple processes. Technical Solution
[5] To achieve the object, there is provided a method of fabricating a plastic heat exchanger, comprising a tube coupling step for coupling the heat exchanger to the header, a heat fusion step for melting and pressing the heat exchanger tube coupled to the header by using heat, and a header coupling step for coupling the header cap to the header which is joined to the plastic heat exchanger tube, wherein the plastic heat exchanger tube and a junction of the header are melted and joined by using a heat fusion jig.
[6] Preferably, the junction of the header comprises a fusion bead which is coupled to the plastic heat exchanger tube and then melted by heat; and a melted material inflow groove which is formed along an outer circumferential surface of the fusion bead so that the melted material is inflowed therein. Thus, the plastic heat exchanger tube and the header can be firmly joined to each other, thereby securing the air-tightness of refrigerant.
[7] Preferably, the melted material inflow groove is formed to have a predetermined width w and a predetermined angle θ so as to prevent the leakage of the melted material and firmly join the melted material and also firmly form a shape after the fusing process.
[8] Preferably, the heat fusion jig comprises an insertion portion which is formed into a conical shape so be smoothly inserted into the plastic heat exchanger tube; a body which has an outer diameter corresponding to an inner diameter of the plastic heat exchanger tube so as to maintain an internal shape of the plastic heat exchanger tube upon the heat-fusing process; a fusion portion which is formed at an upper portion of the body to be inclined at a predetermined angle so that the melted material of the heat exchanger tube and the fusion bead can be smoothly inflowed into the melted material inflow groove; and a fusion valley which is joined to the melted material inflow groove to prevent a leakage of the melted material and which forms a shape after the joining process.
[9] Preferably, a plastic heat exchanger which is fabricated by heat- fusing a plastic heat exchanger tube and a header using a heat fusion jig comprises a fusion bead which is joined to a junction of the header and then melted together with an end of the heat exchanger tube by heat; and a melted material inflow groove which is formed along an outer circumferential surface of the fusion bead so that melted material is inflowed therein.
[10] Preferably, the plastic heat exchanger according to claim 5, wherein the heat fusion jig comprises an insertion portion which is formed into a conical shape; a cylindrical body which has an outer diameter corresponding to an inner diameter of the heat exchanger tube; a fusion portion which is formed at an upper portion of the body to be inclined at a predetermined angle; and a fusion valley which is joined along the melted material inflow groove of the header to prevent a leakage of the melted material.
Advantageous Effects
[11] According to the present invention, since the heat exchanger tube and the header can be firmly coupled, there are some advantages of securing reliability against leakage of refrigerant, having heat exchange performance more excellent than or equal to a metallic heat exchanger and also mass-producing the plastic heat exchanger at low fabricating cost through simple processes.
Brief Description of the Drawings [12] The above and other objects, features and advantages of the present invention will become apparent from the following description of preferred embodiments given in conjunction with the accompanying drawings, in which: [13] Fig. 1 is a view showing a structure of a conventional heat exchanger made of a metallic material; [14] Fig. 2 is a perspective view of a plastic heat exchanger tube according to the present invention; [15] Fig. 3 is a perspective view of a header and a header cap according to the present invention; [16] Fig. 4 shows a perspective view and a cross-sectional view of a junction portion of the header according to the present invention;
[17] Fig. 5 is a perspective view of a fusion jig according to the present invention;
[18] Fig. 6 is a view of assembling the plastic heat exchanger according to the present invention; and [19] Fig. 7 is a perspective view of the plastic heat exchanger fabricated by a method according to the present invention. [20] [Brief Description of Main Elements]
[21] 1 : refrigerant inlet tube 2: refrigerant outlet tube
[22] 3: heat exchanger fin 4: copper heat exchanger tube
[23] 5: plastic heat exchanger tube 6: header
[24] 6a: fusion bead 6b: melted material inflow groove [25] 7: header cap 8: heat fusion jig
[26] 8a: insertion portion 8b: body
[27] 8c: fusion portion 8d: fusion valley
Best Mode for Carrying Out the Invention
[28] Hereinafter, the embodiments of the present invention will be described in detail with reference to accompanying drawings.
[29] Fig. 2 is a perspective view of a plastic heat exchanger tube according to the present invention and Fig. 3 is a perspective view of a header and a header cap according to the present invention, wherein the heat exchanger tube 5 made of a plastic material is formed by an extrusion process and the header 6 and header cap 7 is formed by an injection process. In the extrusion process, a raw material is supplied to an extruder and then extruded by a mold having a predetermined shape and diameter to be molded into a continuous body having a desired shaped section. The extrusion process is proper for mass-production and has an advantage of forming various shapes.
[30] Further, in the injection process, first of all, an injection mold having a predetermined shape is prepared, and resin like melted plastic is filled therein and then solidified to form a production. The injection process is also proper for mass- production at low fabricating cost.
[31] Fig. 4 shows a perspective view and a cross-sectional view of a junction portion of the header according to the present invention and Fig. 5 is a perspective view of a fus ion jig according to the present invention. The drawings show a status that the plastic heat exchanger tube 5 is coupled to the junction portion of the header 6 before being melted, a melting and joining process using a heat fusion jig 8 and a detailed structure of the heat fusion jig 8. That is, the drawings are to help explain the plastic heat exchanger of the present invention and the method of fabricating the same, which comprises a tube coupling step B for coupling the heat exchanger to the header and a heat fusion step C for melting and pressing the heat exchanger tube coupled to the header by using heat. In the tube coupling step B and the heat fusion step C according to the present invention, the plastic heat exchanger tube 5 formed by the extrusion process is coupled to the junction portion of the header 6 formed by the injection process, and the junction portion is melted and pressed simultaneously through the heat fusion jig 8. Thus, the heat exchanger tube 5 and the header 6 are completely heat- fused to each other.
[32] The junction portion of the header 6 is formed with a fusion bead 6a which is melted together with the plastic heat exchanger tube 5 by the heat. Therefore, when the junction portion of the header 6 and the heat exchanger tube 5 are fused by the heat fusion jig 8, the joining therebetween becomes firm. In the above process, the melted material of the junction portion between the heat exchanger rube 5 and the header 6 is inflowed into a melted material inflow groove 6b formed along an outer circumferential surface of the fusion bead 6a. At this time, the melted material is guided by a fusion portion 8c of the heat fusion jig 8 so as to be facilely inflowed in the melted material inflow groove 6b. By a fusion valley 8d of the heat fusion jig 8 which is joined along the melted material inflow groove 6b, a leakage is prevented and also a shape after the fusing process can be formed. Thus, the plastic heat exchanger tube 5 and the header 6 can be firmly joined, thereby perfectly maintaining air- tightness for refrigerant.
[33] In addition, as shown in Fig. 4, it is preferable that the melted material inflow groove
6b has a predetermined width w and a predetermined angle θ so as to prevent the leakage of the melted material and firmly join the melted material and also firmly form the shape after the fusing process.
[34] As shown in Figs. 4 and 5, the heat fusion jig 8 for heat-fusing simultaneously the plastic heat exchanger tube 5 and the junction portion of the header 6 is formed with an insertion portion 8a, a body 8b, a fusion portion 8c and a fusion valley 8d which are formed integrally. The insertion portion 8a is formed to have a conical shape so as to be smoothly inserted into the plastic heat exchanger tube 5 when the plastic heat exchanger tube 5 and the junction portion of the header 6 are heat- fused to each other.
[35] The body 8b is formed into a cylinder shape having an outer diameter corresponding to an inner diameter of the plastic heat exchanger tube 5 so as to maintain an internal shape of the plastic heat exchanger tube 5 upon the heat-fusing process.
[36] The fusion portion 8c is formed at an upper portion of the body 8b to be inclined toward the melted material inflow groove 6b so that the melted material of the heat exchanger tube 5 and the fusion bead 6a of the header 6 can be smoothly inflowed into the melted material inflow groove 6b. Preferably, the inclined angle θ is correspondent to the angle of the melted material inflow groove 6b.
[37] Further, the fusion valley 8d is joining along the melted material inflow groove 6b so as to prevent the leakage of the melted material and also form the shape after the joining process. Herein, the joining shape after the heat fusion process between the plastic heat exchanger tube 5 and the junction of the header 6 is determined according to a shape of an inner valley of the fusion valley 8d.
[38] Fig. 6 is a view of assembling the plastic heat exchanger according to the present invention and Fig. 7 is a perspective view of the plastic heat exchanger fabricated by a method according to the present invention. That is, the drawings are to help explain a header coupling step D for coupling the header cap 7 to the header 6 which is joined to the plastic heat exchanger tube 5 of the present invention. Herein, after the plastic heat exchanger tube 5 and the junction portion of the header 6 are coupled to each other and then simultaneously heat-fused by the heat fusion jig 8, the header cap 7 formed by the injection process is fused to the header 6. Various methods such as vibration fusion, high-frequency fusion, heat fusion and the like can be applied to the fusion process between the header cap 7 and the header 6.
[39] Fig. 7 is a perspective view of the plastic heat exchanger fabricated by a method according to the present invention. The drawing shows the plastic heat exchanger having the refrigerant inlet tube 10 and the refrigerant outlet tube 20, which is fabricated by the above-mentioned processes. When the header cap is formed by the injection process, the refrigerant inlet tube 10 and the refrigerant outlet tube 20 are also formed by an insert injection molding process. Therefore, the refrigerant inlet tube 10 and the refrigerant outlet tube 20 are integrally formed with the header cap 7, thereby securing the prevention of leakage of refrigerant. Industrial Applicability
[40] According to the present invention, since the heat exchanger tube and the header can be firmly coupled, there are some advantages of securing reliability against leakage of refrigerant, having heat exchange performance more excellent than or equal to a metallic heat exchanger and also mass-producing the plastic heat exchanger at low fabricating cost through simple processes.
[41]
[42] Those skilled in the art will appreciate that the conceptions and specific embodiments disclosed in the foregoing description may be readily utilized as a basis for modifying or designing other embodiments for carrying out the same purposes of the present invention. Those skilled in the art will also appreciate that such equivalent embodiments do not depart from the spirit and scope of the invention as set forth in the appended claims.

Claims

Claims
[1] A method of fabricating a plastic heat exchanger, comprising: a step of melting and pressing a plastic heat exchanger tube and a junction of a header by using a heat fusion jig. [2] The method according to claim 1, wherein the junction of the header comprises: a fusion bead which is coupled to the plastic heat exchanger tube and then melted by heat; and a melted material inflow groove which is formed along an outer circumferential surface of the fusion bead so that the melted material is inflowed therein. [3] The method according to claim 2, wherein the melted material inflow groove is formed to have a predetermined width w and a predetermined angle so as to prevent the leakage of the melted material and firmly join the melted material and also firmly form a shape after the fusing process. [4] The method according to claim 1, wherein the heat fusion jig comprises: an insertion portion which is formed into a conical shape so be smoothly inserted into the plastic heat exchanger tube; a body which has an outer diameter corresponding to an inner diameter of the plastic heat exchanger tube so as to maintain an internal shape of the plastic heat exchanger tube upon the heat-fusing process; a fusion portion which is formed at an upper portion of the body to be inclined at a predetermined angle so that the melted material of the heat exchanger tube and the fusion bead can be smoothly inflowed into the melted material inflow groove; and a fusion valley which is joined to the melted material inflow groove to prevent a leakage of the melted material and which forms a shape after the joining process. [5] A plastic heat exchanger which is fabricated by heat-fusing a plastic heat exchanger tube and a header using a heat fusion jig, comprising: a fusion bead which is joined to a junction of the header and then melted together with an end of the heat exchanger tube by heat; and a melted material inflow groove which is formed along an outer circumferential surface of the fusion bead so that melted material is inflowed therein. [6] The plastic heat exchanger according to claim 5, wherein the heat fusion jig comprises: an insertion portion which is formed into a conical shape; a cylindrical body which has an outer diameter corresponding to an inner diameter of the heat exchanger tube; a fusion portion which is formed at an upper portion of the body to be inclined at a predetermined angle; and a fusion valley which is joined along the melted material inflow groove of the header to prevent a leakage of the melted material.
PCT/KR2007/003674 2006-08-11 2007-07-31 Plastic heat exchanger and method of manufacturing the same WO2008018712A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN200780029912XA CN101501436B (en) 2006-08-11 2007-07-31 Plastic heat exchanger and method of manufacturing the same
EP07793329.9A EP2049861B1 (en) 2006-08-11 2007-07-31 Plastic heat exchanger and method of manufacturing the same
BRPI0716653-2A BRPI0716653B1 (en) 2006-08-11 2007-07-31 PLASTIC HEAT EXCHANGER AND METHOD FOR MANUFACTURING THE SAME
US12/310,153 US8966757B2 (en) 2006-08-11 2007-07-31 Plastic heat exchanger and method of manufacturing the same
MX2009001577A MX2009001577A (en) 2006-08-11 2007-07-31 Plastic heat exchanger and method of manufacturing the same.
JP2009523709A JP4999927B2 (en) 2006-08-11 2007-07-31 Plastic heat exchanger and manufacturing method thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2006-0076295 2006-08-11
KR1020060076295A KR100854572B1 (en) 2006-08-11 2006-08-11 Manufacturing method for plastic heat exchanger

Publications (1)

Publication Number Publication Date
WO2008018712A1 true WO2008018712A1 (en) 2008-02-14

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Application Number Title Priority Date Filing Date
PCT/KR2007/003674 WO2008018712A1 (en) 2006-08-11 2007-07-31 Plastic heat exchanger and method of manufacturing the same

Country Status (9)

Country Link
US (1) US8966757B2 (en)
EP (1) EP2049861B1 (en)
JP (1) JP4999927B2 (en)
KR (1) KR100854572B1 (en)
CN (1) CN101501436B (en)
BR (1) BRPI0716653B1 (en)
MX (1) MX2009001577A (en)
TW (1) TWI335979B (en)
WO (1) WO2008018712A1 (en)

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JP2011002195A (en) * 2009-06-22 2011-01-06 Tokyo Electric Power Co Inc:The Heat exchanger and ice storage type air conditioning system
EP3121545A4 (en) * 2014-03-19 2017-11-29 Samsung Electronics Co., Ltd. Heat exchanger and method for manufacturing same
FR3069920A1 (en) * 2018-05-28 2019-02-08 Valeo Systemes Thermiques BATTERY COOLING DEVICE AND METHOD FOR MANUFACTURING THE SAME
EP3453996A1 (en) * 2017-09-12 2019-03-13 Mahle International GmbH Method for producing a heat exchanger

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* Cited by examiner, † Cited by third party
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KR101411077B1 (en) * 2007-07-28 2014-06-25 안황재 Plastic heat exchanger
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CN101501436A (en) 2009-08-05
EP2049861A1 (en) 2009-04-22
BRPI0716653B1 (en) 2019-06-25
EP2049861A4 (en) 2013-09-04
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BRPI0716653A2 (en) 2013-09-17
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US20100012304A1 (en) 2010-01-21
KR20080014498A (en) 2008-02-14

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