GB2466687A - Heat exchanger and method of manufacturing a heat exchanger - Google Patents

Heat exchanger and method of manufacturing a heat exchanger Download PDF

Info

Publication number
GB2466687A
GB2466687A GB0912860A GB0912860A GB2466687A GB 2466687 A GB2466687 A GB 2466687A GB 0912860 A GB0912860 A GB 0912860A GB 0912860 A GB0912860 A GB 0912860A GB 2466687 A GB2466687 A GB 2466687A
Authority
GB
United Kingdom
Prior art keywords
tube
heat transmission
heat exchanger
transmission tube
solder
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.)
Granted
Application number
GB0912860A
Other versions
GB2466687B (en
GB0912860D0 (en
Inventor
Hideki Mori
Takayuki Hanaki
Mitsusada Hayakawa
Masaaki Azuma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of GB0912860D0 publication Critical patent/GB0912860D0/en
Publication of GB2466687A publication Critical patent/GB2466687A/en
Application granted granted Critical
Publication of GB2466687B publication Critical patent/GB2466687B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • B21D53/085—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal with fins places on zig-zag tubes or parallel tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • B23K1/0012—Brazing heat exchangers
    • 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
    • F28D1/0246—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 heat-exchange elements having several adjacent conduits forming a whole, e.g. blocks
    • 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
    • F28D1/0535—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 the conduits having a non-circular cross-section
    • 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
    • F28D1/0535—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 the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05383—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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • 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
    • F28F1/32—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 having portions engaging further tubular elements
    • 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
    • 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
    • F28F21/089—Coatings, claddings or bonding layers made from metals or metal alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/14—Heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/12—Fins with U-shaped slots for laterally inserting 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
    • F28F2245/00—Coatings; Surface treatments
    • F28F2245/02—Coatings; Surface treatments hydrophilic

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

A heat exchanger and subsequently a method of manufacturing a heat exchanger, the heat exchanger comprises a plurality of aluminium alloy stacked plate fins 10 subjected to a hydrophilic film forming treatment and at least one flat aluminium alloy heat transmission tube 1 provided with a plurality of refrigerant flow paths 3. The tubes 1 are fitted in grooves 11 in the fins 10, and have a solder layer (4 fig 5) provided on an outer surface at a front edge of the at least one tube 1 that is melted such that the at least one tube 1 is secured to the fins 10 by the solder. The grooves 11 may be located in an edge of the fins 1 and may comprise collars 12. The temperature at which the solder melts is lower than the heat resistant temperature of the hydrophilic film.

Description

HEAT EXCHANGER, ITS MANUFACTURING METHOD, AND AIR CONDITIONER INCLUDING THE HEAT
EXCHANGER
[0001] The present invention relates toa heat exchanger which includes a plurality of plate fins stacked at predetermined intervals to allow the air to flow therebetweeri and a heat transmission tube made up of a flat tube provided with a plurality of refrigerant flow paths and fitted to the plate fins, a method for manufacturing the heat exchanger, and an ai conditioner including the heat exchanger.
[0002] Hitherto, there is known a method of ñanufacturing a heat exchanger using an aluminum alloy flat tube, wherein an aluminum alloy brazing filler material is attached to the flat tube by welding, to prevent generation of unwelded failure between the flat tube and a corrugated fin at the time of brazing (see, for example, Patent Document 1) [0003] There is also known a method of manufacturing a heat exchanger, wherein on a surface of a flat heat exchange tube formed by extruding an aluminum alloy, an aluminum alloy layer having a melting point lower than that of the flat heat exchange tube and that of a plate fin made of an aluminum alloy is formed thereby brazing the flat heat exchange tube and the plate fin to each other (see, for example, Patent Document 2) [0004] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 11-19796 (pages 2 and 3, and Fig. 1) [Patent Document 2] Japanese Unexamined Patent Application Publication No. 9-79766 (pages 3 and 4, and Fig. 2) [0005] According to the technique disclosed in Patent Document 1, the fin pitch is large, and thus, the heat exchanger should be increased in size in order to achieve intended heat exchange performance.
[0006] The heat exchanger disclosed in Patent Document 2 may exhibit sufficient heat exchange performance. However, brazing of the flat heat exchange tube with the plate fin is conducted at a high temperature, and thus, hydrophilic treatment of the plate fin can be perfomed only after the formation of the heat exchanger. This requires an additional, expensive surface treatment process, thereby increasing the manufacturing costs.
[00071 Furthermore, in the case where a flat heat exchange tube, to which a brazing filler material is. applied in advance, is inserted into a groove provided in a plate fin, a small clearance between the groove of the plate fin and the flat heat exchange tube may cause deformation of the plate fin or adhesion of the brazing filler material to the surface treatment film of the plate fin, at the time of insertion, leading to degradation of the hydrophilic effect of the plate fin.
[00081 In view of the foregoing, an object of the present invention is to provide a heat exchanger which is improved in terms of heat transfer efficiency and space saving, which can be manufactured with simplified steps and at a reduced cost, and which ensures improved reliability when used, a method for manufacturing the heat exchanger, and an air conditioner including the heat exchanger.
[0009] According to an aspect of the present invention, a heat exchanger includes: a plurality of plate fins, made of an aluminum alloy, subjected to a hydrophilic film forming treatment, and stacked at predetermined intervals to allow air to flow therebetween; and a fiat heat transmission tube, made of an aluminum alloy and provided with a plurality of refrigerant flow paths arranged in a major axis direction of the tube so as to extend in a longitudinal direction of the tube; wherein the heat transmission tube is fitted into grooves provided in the plate fins, and a solder layer provided on an outer surface of the heat transmission tube at a front edge thereof is melted such that the heat transmission tube is fixedly secured to the plate fins by the solder.
[0010] According to another aspect of the present invention, a method for manufacturing a heat exchanger includes the steps of: forming a solder layer on an outer surface at a front edge of a long flat tube which is made of an aluminum alloy and provided with a refrigerant flow path; cutting the tube so as to make a heat transmission tube having a predetermined length; aligning a plurality of plate fins at predetermined intervals, each of the fins made of an aluminum alloy, provided with a groove to fit and secure the heat transmission tube and further subjected to a hydrophilic film forming treatment; fitting the heat transmission tube into the grooves of the plate fins, and heating the heat transmission tubes to melt the solder to cause the solder to flow into gaps between the heat transmission tubes and the plate fins; and fixedly securing the tubes to the plate fins by cooling the solder.
[0011] According to yet another aspect of the present invention, an air conditioner includes either of the heat exchangers described above.
[0012] As described above, according to the present invention, a solder layer having a low melting point is provided on an outer surface at a front edge of a flat heat transmission tube provided with a refrigerant flow path, and the heat transmission tube-is--fit-ted -toplate -f-ins--wh-ich are ------subjected to a hydrophilic film forming treatment and stacked on one another. The solder provided on the heat transmission tube is then melted to integrally secure the tube and the plate fins. Accordingly, it is possible to obtain a highly reliable heat exchanger which can be manufacturedeasily and at a low cost, and an air conditioner provided with the heat exchanger.
The invention will now be described by way of non-limiting example with reference to the accompanying drawings, in which: [0013] Fig. 1 illustrates a main part of a heat
I
exchanger according to a first embodiment of the present invention.
Fig. 2 illustrates a heat transmission tube shown in Fig. 1.
Fig. 3 illustrates a main part of a plate fin shown in Fig. 1.
Fig. 4. is a flowchart illustrating a procedure of manufacturing a heat exchanger according to the present invention.
Fig. 5 illustrates the procedure of manufacturing the heat exchanger according to the present invention.
Fig. 6 illustrates the state where the heat transmission tube is fitted to the plate fin.
Fig. 7 illustrates the state where the heat transmission tube is fixedly securd to the plate fin.
[0014] Fig. 1 illustrates a main part of a heat exchanger according to a first embodiment of the present invention, Fig. 2 illustrates a heat transmission tube shown in Fig. 1, and Fig. 3 illustrates a main part of a plate fin shown in Fig. 1. Throughout the figures, some parts are shown out of scale for convenience of explanation.
S
Referring to the figures, the heat transmission tube 1 is made up of a flat tube 2 in which refrigerant flow paths 3 are provided. The plate fins 10. are stacked at predetermined intervals, with the heat transmission tubes 1 attached thereto, to allow the air to flow between the plate fins 10.
[001511 The heat transmission tube 1 is constituted by the flat tube 2 which is made of an aluminum alloy and provided with a plurality of refrigerant flow paths 3 arranged in the major axis direction of the flat tube 2 so as to extend in the longitudinal direction thereof. A layer of solder 4 (hereinafter, also referred to as the "solder layer 4") having a low melting point is provided on an outer surface * of the heat transmission tube-i, at--one-end in--its--major axis direction (hereinafter, the end will be referred to as the "front edge" of the heat transmission tube 1) [0016] * -The solder 4 is Sn-Cu based, Sn-Bi based, or Sn-Zn based solder, with a melting point falling within a range from 140°C-to 230°C. The solder layer 4 has a thickness of from 5 pin to 50 jmt.. The solder layer 4 is provided on the part of the heat transmission tube 1 that will be exposed from the groove 11 of the plate fin 10 and will not come in contact with the plate fin 10 when the heat transmission -7--tube 1 is inserted in the groove 11 (see Fig. 6) . This ensures a smaller pitch of the plate fins 10 and, hence, a reduced space occupied thereby.
[0017] The plate fin 10 made of an aluminum alloy has a plurality of grooves 11 arranged at regular intervals in its longitudinal direction (width direction), to which the heat transmission tubes 1 are to be fitted and secured. Each groove 11 has fin collars 12 which are provided along its respective edges and bent to the same surface side of the plate fin 10. The groove 11 is shaped to correspond to the outer shape of the heat transmission tube 1, with its width W1 greater by about 10-50 pin than the width W of the heat transmission tube 1. The plate fin 10 has its outer surface subjec-t-ed--tea_-h-yd-roph4-l-i-e---f-i_l-m_-f-o-rm-ing-t-reatment-(. not-_---_---_--shown), and the formed hydrophilic film is heat resistant up to about 250°C.
[0018] Hereinafter, a method for manufacturing the heat exchanger with the above-described structure will be described with reference to the flowchart in Fig. 4.
For manufacturing the heat transmission tube 1, an.
aluminum alloy material is processed by, for example, drawing or extrusion to obtain a long flat tube. A solder layer 4 is provided on an outer surface of the tube at its front edge in the major axis direction. The tube is then cut so as to make a heat transmission tube having a length corresponding to that of the heat exchanger to which the tube is to be applied.
[0019] For manufacturing the plate fins 10, an aluminum alloy material is processed with a press into a predetermined shape to obtain a plate fin and its outer surface is subjected to a hydrophilic film treatment. A plurality of such plate fins are aligned and stacked at predetermined intervals using a jig and the like. At this time, the grooves 11 of the adjacent plat fins 10 are aligned with each other.
* [0020] -*Next,-as-are fitted respectively into the aligned grooves 11 of the stacked plate fins 10. The fitted state is shown in Fig. 6.
In this state, the solder layer 4 provided at the front edge of the heat transmission tube 1 is exposed from the groove 11 of the plate fin 10 and out of contact with the plate fin 10. Further, there is a small gap g (10-50.ixn/2) between the outer periphery of the heat transmission tube 1 and the groove 11 (fin collars 12) [0021] Next, the plate fins 10 with the heat transmission 9 -tubes 1 fitted into their grooves 11 are placed in a furnace and heated at a temperature which is higher by 20-30°C than the melting point (140-230°C) of the solder 4, for about 5 to 10 minutes. Although the furnace interior is preferably kept in a reducing atmosphere or a vacuum, in the case where the heating is conducted in the atmosphere, a flux may be applied onto the heat transmission tubes 1 in advance to improve solder wettability. Note that the heating temperature in the furnace should be set to a level lower than 250°C., because the hydrophilic film formed on the outer surfaces of the plate fins 10 is heat resistant up to about 250°C.
[0022) Through the heat treatment in the furnace as described -------above, the.solder-4-is-melted-and f-lows-into-each-gap--g between the heat transmission tube 1 and the plate fin 10 (fin collars 12) by capillary action, as shown in Fig. 7.
When cooled, the gap "g" between the heat transmission tube 1 and the plate fin 10 is filled with the solder 4 having good heat conductivity, so that they are fixedly secured into one piece.
[0023) According to the heat exchanger of the present embodiment, heat transmission tubes 1 are each made up of a flat tube 2 which is made of an aluminum alloy and provided with a refrigerant flow path 3. On the outer surface of the * heat transmission tubes 1 at their front edge, solder layers 4 having a low melting point are provided in advance. A plurality of plate fins 10 are each made of an aluminum alloy, provided with grooves 11 to which the heat * transmission tubes 1 are to be fitted and secured, and subjected to a hydrophilic film forming treatment before being stacked on one another. The heat transmission tubes 1 are fitted to the plate fins 10, and they are heated at a low temperature not greater than the heat-resistant temperature of the hydrophilic film to cause the molten solder 4 to flow into and fill the gaps between the plate fins 10 and the heat transmission tubes 1. When cooled, they are fixedly secured in an integrated manner via the solder exhibiting good heat conductivity. -Accordingly, it is possible to obtain a compact and highly reliable heat exchanger which can be manufactured easily and at a low cost.
[0024] According to a second embodiment of the present invention, in an air conditioner having a refrigeration cycle in which a compressor, a condenser, an expansion valve, and an evaporator are successively connected via refrigerant piping, the heat exchanger according to the first embodiment is used for one or both of the condenser and the evaporator.
-11 -
I
According to the present embodiment, it is possible to obtain a compact and highly reliable air conditioner.
[Reference Numerals] [0025] 1: heat transmission tube 2: flat tube 3: refrigerant flow path 4: solder (solder layer) 10: plate fin 11: groove 12: fin collar -12 -

Claims (5)

1. A heat exchanger comprising: a plurality of plate fins (10), made of an aluminum alloy, subjected to a hydrophilic film forming treatment, and stacked at predetermined intervals to allow air to flow therebetween; and a flat heat transmission tube (1), made of an aluminum alloy and provided with a plurality of refrigerant flow paths (3) arranged in a major axis direction of the tube so as to extend in a longitudinal direction of the tube (1); wherein the heat transmission tube (1) is fitted into grooves (11) provided.in the plate fins (10), and a solder layer (4) provided on an outer surface of the heat transmission tube (1) at a. front edge thereof is melted such that the heat transmission tube (1) is fixedly secured to the plate fins (10) by the solder.
2. A method for manufacturing a heat exchanger, comprising the steps of: forming a solder layer (4) on an outer surface at a front edge of a long flat tube (2) made of an aluminum alloy and provided with a refrigerant flow path (3); cutting the tube (2) so as to make a heat transmission tube (1) having a predetermined length; aligning a plurality of plate fins (10) at predetermined intervals, each of the fins (10) made of an aluminum alloy, provided with a groove (11) to which the heat transmission tube (1) is t be fitted and secured and further subjected to a hydrophilic film forming treatment; fitting the heat transmission tube (1) into the grooves (11) of the plate fins (10), and heating and melting the solder to cause the solder to flow into gaps between the heat transmission tube (1) and the plate fins (10); and fixedly securing the heat transmission tube (1) to the plate fins (10) by cooling the solder.
3. A heat exchanger substantially as hereinbefore described with reference to the accompanying drawings.
4. A method of manufacturing a heat exchanger substantially as hereinbefore described with reference to the accompanying drawings.
5. An air conditioner including the heat exchanger as defined in claim 1 or 3 or the heat exchanger manufactured by the method as defined in claim 2 or 4.AMENDMENTS TO THE CLAIMS HAVE BEEN FILED AS FOLLOWS1. A method for manufacturing a heat exchanger, comprising the steps of: forming a solder layer (4) only on a limited part of an outer surface at a front edge of a relatively long flat tube (2) made of an aluminum alloy and provided with a refrigerant flow path (3) cutting the tube (2) so as to make a heat transmission tube (1) having a predetermined length; aligning a plurality of plate fins (10) at predetermined intervals, each of the fins (10) made of an aluminum alloy, provided with a groove (11) to which the heat transmission tube (1) is to be fitted and secured and further subjected to a hydrophilic film forming treatment; fitting the heat transmission tube (1) into the grooves (11) of the plate fins (10), and 0: heating and melting the solder to cause the solder to flow into gaps between. the heat transmission tube (1) *S.and the plate fins (10); and : fixedly securing the heat trarsmission tube (1) to * *.* the plate fins (10) by cooling the solder; wherein in the step of forming a solder layer (4), the solder layer (4) has a thickness of from 5 to 50prn, and said limited part corresponds to a part of the heat transmission tube that is exposed from the groove (11) of the plate fins (10) and does not come in contact with the plate fins (10) in the step of fitting the heat transmission tube (1) into the groove (11) 2. A method of manufacturing a heat exchanger according to claim 1 and substantially as hereinbefore described with reference to the accompanying drawings.3. An air conditioner including a heat exchanger manufactured by the methods as defined in claim 1 or 2. * .* *a... * * * * . S * S * *SSS * S.S 5S S.. *
GB0912860A 2009-01-05 2009-07-23 Heat exchanger, its manufacturing method and air conditioner including the heat exchanger Expired - Fee Related GB2466687B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009000225A JP5279514B2 (en) 2009-01-05 2009-01-05 HEAT EXCHANGER, ITS MANUFACTURING METHOD, AND AIR CONDITIONER HAVING THE HEAT EXCHANGER

Publications (3)

Publication Number Publication Date
GB0912860D0 GB0912860D0 (en) 2009-08-26
GB2466687A true GB2466687A (en) 2010-07-07
GB2466687B GB2466687B (en) 2010-12-08

Family

ID=41058461

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0912860A Expired - Fee Related GB2466687B (en) 2009-01-05 2009-07-23 Heat exchanger, its manufacturing method and air conditioner including the heat exchanger

Country Status (3)

Country Link
JP (1) JP5279514B2 (en)
CN (1) CN101769689B (en)
GB (1) GB2466687B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130299152A1 (en) * 2011-01-21 2013-11-14 Daikin Industries, Ltd. Heat exchanger and air conditioner
EP2713135A1 (en) * 2012-09-27 2014-04-02 Samsung Electronics Co., Ltd Heat exchanger
EP2803930A4 (en) * 2012-01-11 2016-01-13 Mitsubishi Electric Corp Plate fin-and-tube heat exchanger, and refrigeration and air-conditioning system with same
EP3078930A4 (en) * 2014-01-15 2017-07-26 Samsung Electronics Co., Ltd. Heat exchanger and air conditioner having same
WO2019063610A1 (en) * 2017-09-28 2019-04-04 Mahle International Gmbh Heat exchanger
FR3088711A1 (en) * 2018-11-16 2020-05-22 Valeo Systemes Thermiques HEAT EXCHANGER FOR MOTOR VEHICLE
CN112344763A (en) * 2019-08-07 2021-02-09 丹佛斯有限公司 Method for manufacturing heat exchanger

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102192674B (en) * 2010-03-16 2016-09-07 乐金电子(天津)电器有限公司 Flat pipe heat exchanger and assembly method thereof
JP5727299B2 (en) * 2010-05-31 2015-06-03 株式会社Uacj Manufacturing method of fin-and-tube heat exchanger
CN102338569A (en) * 2010-07-16 2012-02-01 乐金电子(天津)电器有限公司 Heat exchanger structure and assembly method thereof
CN102338570A (en) * 2010-07-16 2012-02-01 乐金电子(天津)电器有限公司 Heat exchanger structure and assembly process thereof
CN102338587B (en) * 2010-07-16 2016-03-02 乐金电子(天津)电器有限公司 Heat exchanger structure and assembly technology thereof
JP5753355B2 (en) * 2010-09-02 2015-07-22 株式会社Uacj Heat transfer tube for fin-and-tube heat exchanger, fin-and-tube heat exchanger using the same, and manufacturing method thereof
KR20120044848A (en) * 2010-10-28 2012-05-08 삼성전자주식회사 Heat exchanger and micro-channel tube for the same
JP2012102951A (en) * 2010-11-11 2012-05-31 Mitsubishi Alum Co Ltd Tube for heat exchanger, and heat exchanger
KR101453708B1 (en) * 2011-01-21 2014-10-22 다이킨 고교 가부시키가이샤 Heat exchanger and air conditioner
JP5748625B2 (en) * 2011-09-15 2015-07-15 三菱電機株式会社 Heat exchanger manufacturing method and manufacturing apparatus
WO2013160950A1 (en) * 2012-04-26 2013-10-31 三菱電機株式会社 Heat exchanger and air conditioner
JP5832641B2 (en) * 2012-04-27 2015-12-16 三菱電機株式会社 Heat exchanger, method for manufacturing the same, and refrigeration cycle apparatus
WO2013160959A1 (en) 2012-04-27 2013-10-31 三菱電機株式会社 Heat exchanger, method for producing same, and refrigeration cycle device
CN102784987B (en) * 2012-06-18 2014-11-19 航天材料及工艺研究所 Method for welding built-in Ni-based high-temperature alloy pipe of C/C composite material
EP2884211A4 (en) * 2012-08-08 2016-04-06 Mitsubishi Electric Corp Heat exchanger and air conditioner provided with said heat exchanger
CN105783139A (en) * 2012-08-08 2016-07-20 三菱电机株式会社 Manufacture method for heat exchanger and manufacture method for air conditioner
JP5911597B2 (en) * 2012-11-13 2016-04-27 三菱電機株式会社 Flat shape heat transfer tube, method of manufacturing cross fin tube type heat exchanger equipped with the same, cross fin tube type heat exchanger manufactured by the method
WO2015040746A1 (en) * 2013-09-20 2015-03-26 三菱電機株式会社 Heat exchanger, air conditioner device using said heat exchanger, and method for producing said heat exchanger
DE102013222258A1 (en) 2013-10-31 2015-05-21 MAHLE Behr GmbH & Co. KG Process for producing a heat exchanger, in particular a sorption heat exchanger
CN104640250B (en) * 2013-11-08 2017-08-25 美的集团股份有限公司 Ptc heater and the air conditioner with it
CN104482791A (en) * 2014-12-02 2015-04-01 珠海格力电器股份有限公司 Heat exchanger fin and heat exchanger
KR101540071B1 (en) * 2015-01-27 2015-07-29 (주)삼원산업사 Manufacturing method of condenser for air conditioning
WO2017072945A1 (en) * 2015-10-30 2017-05-04 三菱電機株式会社 Heat exchanger and air conditioner
JP2016048162A (en) * 2015-12-14 2016-04-07 三菱電機株式会社 Manufacturing method for heat exchanger and manufacturing method for air conditioner
CN106918261B (en) * 2015-12-25 2022-03-08 浙江盾安热工科技有限公司 Fin and heat exchanger
CN108779965A (en) * 2016-02-24 2018-11-09 三菱电机株式会社 Heat exchanger
CN106524787B (en) * 2016-11-09 2018-08-07 广东芬尼克兹节能设备有限公司 A kind of free-floride heating sheet structure
JP6837397B2 (en) * 2017-07-21 2021-03-03 日立ジョンソンコントロールズ空調株式会社 Heat exchanger manufacturing method and multi-row heat exchanger
CN107421160B (en) * 2017-08-28 2020-11-10 华北电力大学（保定） High-efficient controllable cooling device
CN107484397A (en) * 2017-09-25 2017-12-15 陕西黄河集团有限公司 A kind of heat-pipe radiating apparatus and manufacturing process
JP6776405B2 (en) * 2019-05-16 2020-10-28 三菱アルミニウム株式会社 Heat exchanger and manufacturing method of heat exchanger

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003214791A (en) * 2002-01-23 2003-07-30 Mitsubishi Electric Corp Heat exchanger
JP2003262485A (en) * 2002-03-07 2003-09-19 Mitsubishi Electric Corp Fin tube type heat exchanger, its manufacturing method, and refrigeration air conditioner
JP2003287390A (en) * 2002-03-27 2003-10-10 Mitsubishi Electric Corp Heat exchanger and air conditioner using this heat exchanger

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS602186U (en) * 1983-06-20 1985-01-09 ダイキン工業株式会社 Heat exchanger with fins
JPH1089870A (en) * 1996-09-18 1998-04-10 Nippon Light Metal Co Ltd Manufacture of heat exchanger and heat exchanger
JPH10265882A (en) * 1997-03-25 1998-10-06 Mitsubishi Heavy Ind Ltd Aluminum alloy heat exchanger
JP2003200260A (en) * 2001-12-27 2003-07-15 Showa Denko Kk Method for brazing hollow body and tube body and method for manufacturing heat exchanger

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003214791A (en) * 2002-01-23 2003-07-30 Mitsubishi Electric Corp Heat exchanger
JP2003262485A (en) * 2002-03-07 2003-09-19 Mitsubishi Electric Corp Fin tube type heat exchanger, its manufacturing method, and refrigeration air conditioner
JP2003287390A (en) * 2002-03-27 2003-10-10 Mitsubishi Electric Corp Heat exchanger and air conditioner using this heat exchanger

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130299152A1 (en) * 2011-01-21 2013-11-14 Daikin Industries, Ltd. Heat exchanger and air conditioner
US20130306286A1 (en) * 2011-01-21 2013-11-21 Daikin Industries, Ltd. Heat exchanger and air conditioner
US9328973B2 (en) * 2011-01-21 2016-05-03 Daikin Industries, Ltd. Heat exchanger and air conditioner
EP2803930A4 (en) * 2012-01-11 2016-01-13 Mitsubishi Electric Corp Plate fin-and-tube heat exchanger, and refrigeration and air-conditioning system with same
EP2713135A1 (en) * 2012-09-27 2014-04-02 Samsung Electronics Co., Ltd Heat exchanger
EP3078930A4 (en) * 2014-01-15 2017-07-26 Samsung Electronics Co., Ltd. Heat exchanger and air conditioner having same
WO2019063610A1 (en) * 2017-09-28 2019-04-04 Mahle International Gmbh Heat exchanger
FR3088711A1 (en) * 2018-11-16 2020-05-22 Valeo Systemes Thermiques HEAT EXCHANGER FOR MOTOR VEHICLE
CN112344763A (en) * 2019-08-07 2021-02-09 丹佛斯有限公司 Method for manufacturing heat exchanger

Also Published As

Publication number Publication date
JP5279514B2 (en) 2013-09-04
CN101769689A (en) 2010-07-07
JP2010156525A (en) 2010-07-15
GB2466687B (en) 2010-12-08
CN101769689B (en) 2012-07-18
GB0912860D0 (en) 2009-08-26

Similar Documents

Publication Publication Date Title
GB2466687A (en) Heat exchanger and method of manufacturing a heat exchanger
EP1586844A1 (en) Plate fin for heat exchanger and heat exchanger core
US20080237312A1 (en) Brazing method
US20060175047A1 (en) Heat exchanger, method of manufacturing heat exchanger and plate-shaped fin for heat exchanger
WO2013161792A1 (en) Heat exchanger, method for producing same, and refrigeration cycle device
JP5796531B2 (en) Vehicle heat exchanger with cold storage function
JP2013221713A (en) Heat exchanger, and heat pump device
WO2019234847A1 (en) Heat exchanger
KR100436070B1 (en) Sacrifice corrosion layer forming method
JP2012172892A (en) Fin and tube type heat exchanger
JP4626472B2 (en) Heat exchanger and heat exchanger manufacturing method
JP2004353954A (en) Heat exchanger
JP6136124B2 (en) Heat exchanger manufacturing method and heat exchanger
WO2021235055A1 (en) Heat exchanger and heat exchanger manufacturing method
JP2018151040A (en) Pipe joint, heat exchanger and manufacturing method of heat exchanger
KR20140094126A (en) A heat exchanger and a method for manufacturing the same
JP2005127676A (en) Heat exchanger, and manufacturing method of heat exchanger
JP2011174640A (en) Heat exchanger
JP2007007672A (en) Heat exchanger
GB2254687A (en) Heat exchanger
WO2021192189A1 (en) Heat exchanger, refrigeration cycle device, and method for manufacturing heat exchanger
JP3818223B2 (en) tank
WO2015035998A1 (en) Heat exchanger and methode and use
JP2007107772A (en) Heat exchanger, manufacturing method thereof, and refrigeration cycle device using the heat exchanger
JP2009008277A (en) Heat exchanger and its manufacturing method

Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)

Effective date: 20120430

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20210723