EP1970661A1 - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
- Publication number
- EP1970661A1 EP1970661A1 EP08003605A EP08003605A EP1970661A1 EP 1970661 A1 EP1970661 A1 EP 1970661A1 EP 08003605 A EP08003605 A EP 08003605A EP 08003605 A EP08003605 A EP 08003605A EP 1970661 A1 EP1970661 A1 EP 1970661A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- header
- side edge
- heat exchanger
- cover
- edge portion
- 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.)
- Withdrawn
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
- F28F9/0224—Header boxes formed by sealing end plates into covers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
- F28D2021/0084—Condensers
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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
- F28F2275/00—Fastening; Joining
- F28F2275/08—Fastening; Joining by clamping or clipping
- F28F2275/085—Fastening; Joining by clamping or clipping with snap connection
Definitions
- the present invention relates to a heat exchanger, and specifically, to a structure of a header portion of the heat exchanger.
- a header 104 is formed by assembling a tank forming member 101 (a header cover) formed as an arc shape in cross section and a tube attaching member 103 (a header plate) connected with tubes 102 (for example, Japanese Patent 3,026,754 ).
- a header 104 although tank forming member 101 and tube attaching member 103 are brazed to each other, a plurality of holding parts 105 bent and projected are provided along a longitudinal direction of header 104 (a direction perpendicular to a sheet plane of Fig. 5 ) and temporary fixing is employed by caulking these holding parts 105.
- a header portion of a conventional heat exchanger also known is a structure wherein a connecting portion is formed by bending a side edge portion of a header plate, an enlarged width portion is formed on a side edge portion of a header cover so as to cover the connecting portion of the header plate from outside, and the side edge portion of the header plate and the side edge portion of the header cover are connected to each other by brazing (for example, JP-A-2005-233570 ).
- the header structure is formed as a structure which is relatively difficult to easily carry out this insertion, and consequently, a high accuracy is required for each fitting portion. Further, when the enlarged width portion with a predetermined shape is formed by bending on the side edge portion of the header cover, totally three times of bending operation are required, and for the bending operation, a large number of molds are required.
- a header structure of a heat exchanger in which an apparatus for manufacturing can be simplified including a decrease of the number of molds, a defect of a product such as a failure of brazing can be prevented from occurring, the operation for assembling a header plate and a header cover before brazing can be facilitated, and the design freedom can be increased.
- a heat exchanger has tubes in which heat exchange medium flows and a header to which ends of the tubes are connected, and is characterized in that the header comprises a header plate to which ends of the tubes are connected and a header cover which opens in one direction, a closed structure in cross section of the header is formed by inserting the header plate from an opening portion of the header cover into the header cover and fitting both side edge portions of the header plate into the header cover, and at least one side edge portion of the header cover has a surface inclined relatively to an insertion direction of the header plate for guiding a side edge portion of the header plate.
- a relative fitting operation may be carried out. Namely, as an actual operation, the header plate may be moved relatively to the header cover in the direction for inserting and fitting the header plate into the header cover, or the header cover may be moved relatively to the header plate so that the header cover is fitted onto the outside of both side edge portions of the header plate.
- the side edge portion of the header cover has an inclined surface for guiding the side edge portion of the header plate, the side edge portion of the header plate is smoothly guided along the inclined surface when the header plate is inserted into the header cover, and the side edge portion of the header plate is fitted into a predetermined position of the header cover easily and accurately.
- the side edge portion of the header cover in particular, the inclined surface provided thereon, is used as a guide for assembling the header plate and the header cover.
- the side edge portion of the header cover is slightly deformed elastically so that the distance between both side edge portions of the header cover is slightly enlarged, after the side edge portion of the header plate is fitted into a predetermined position of the header cover, the side edge portion of the header cover which has been elastically deformed is returned to its original position, and the desired, predetermined formation for fitting the side edge portion of the header plate into the header cover can be maintained by utilizing the elastically returning force.
- a predetermined formation for the fitting becomes possible by merely inserting the header plate into the header cover, and a so-called one touch fitting becomes possible.
- the inclined surface can be formed by cutting a side edge of the header cover obliquely relatively to the insertion direction of the header plate.
- the inclined surface can be formed by bending the side edge portion of the header cover obliquely relatively to the insertion direction of the header plate.
- the inclined surface for guiding the side edge portion of the header plate can be very easily formed on the side edge portion of the header cover.
- a space for fitting of the side edge portion of the header plate is formed on the side edge portion of the header cover by bending the side edge portion of the header cover.
- the side edge portion of the header plate may be stored in a predetermined position at a high accuracy merely by being inserted into the header cover, it may be easily fitted at a predetermined formation relatively to the side edge portion of the header cover, and the predetermined fitting formation may be maintained stably.
- the space with a predetermined shape even if a small gap exists in the space after the fitting, the gap can be easily filled by brazing, and a good brazing condition between the header cover and the header plate can be easily ensured.
- a structure may be employed wherein a bent portion on the side edge portion of the header cover has a first bending portion bent toward outside of the header cover and a second bending portion bent toward inside of the header cover. Because such a bending structure can be achieved by totally two times of bending operations, the number of bending operations can be decreased as compared with the structure in the aforementioned JP-A-2005-233570 which requires totally three times of bending operations, and the number of molds for bending operations can also be decreased.
- the first bending portion may be bent obliquely relatively to the insertion direction of the header plate, and the second bending portion may be bent in a direction returned from the bending direction of the first bending portion, obliquely relatively to the insertion direction of the header plate.
- a fitting portion on the side edge portion of the header plate fitted into the header cover may be formed easily at a desirable form by bending the side edge portion of the header plate.
- the fitting portion on the side edge portion of the header plate fitted into the header cover is formed by bending the side edge portion of the header plate toward a side of a heat exchanger core. If bent toward a side opposite the heat exchanger core, it becomes difficult to guide the side edge portion of the header plate along the inclined surface of the header cover side. Further, if a bending portion for forming this fitting portion is formed in a curved shape, easier guiding along the inclined surface may be achieved, and easier operation for the insertion and the fitting of the header plate may be achieved.
- header plate and the header cover are brazed to each other, and a header having a predetermined sealability can be completed.
- This brazing may be carried out at a time in a furnace, together with the heat exchanger core portion.
- Such a heat exchanger according to the present invention is suitable, in particular, as a condenser. Further, it is suitable as a heat exchanger used for an air conditioning system for vehicles, which requires efficiency for mass production and cost down greatly.
- the assembling of the header plate and the header cover can be facilitated, the header structure before brazing can be kept in a predetermined form even if caulking operation due to holding parts is not carried out as in the conventional structure, the number of bending processes (the number of molds) for processing the header cover can be decreased, and the design freedom can be increased.
- Fig. 1 is a perspective view of a heat exchanger according to an embodiment of the present invention.
- Fig. 2 is an enlarged, partial, perspective view of a header of the heat exchanger depicted in Fig. 1 .
- Figs. 3A and 3B are cross-sectional views showing a process for manufacturing the header depicted in Fig. 2 .
- Fig. 4 is a cross-sectional view of a header of a heat exchanger according to another embodiment of the present invention.
- Fig. 5 is a cross-sectional view of a header of a conventional heat exchanger.
- Figs. 1-3 depict a heat exchanger according to an embodiment of the present invention, and show a heat exchanger, for example, used for an air conditioning system for vehicles, for example, as a condenser.
- heat exchanger 1 has a pair of headers 2, a plurality of tubes 3 which are arranged in parallel to each other between headers 2 so as to communicate between headers 2 and in which heat exchange medium (for example, refrigerant) flows, and an inlet block 4 for introducing the heat exchange medium into heat exchanger 1 and an outlet block 5 for discharging the heat exchange medium from heat exchanger 1 which are connected to one of headers 2.
- heat exchange medium for example, refrigerant
- header 2 is constructed as depicted in Figs. 2 and 3 .
- Header 2 has a header plate 7 which has a plurality of tube insertion holes 6 into that the ends of tubes 3 are inserted and to which the ends of tubes 3 are connected by inserting the ends of tubes 3 into tube insertion holes 6, and a header cover 8 which opens in one direction (at one side toward header plate 7).
- Header 2 having a closed structure in cross section is formed by relatively inserting header plate 7 into header cover 8 from an opening portion 9 of header cover 8 and fitting both side edge portions 10 of header plate 7 into both side edge portions I 1 of header cover 8.
- a surface 13 inclined relatively to an insertion direction 12 of header plate 7 is formed for guiding side edge portion 10 of header plate 7.
- inclined surface 13 is formed by bending side edge portion 11 of header cover 8 obliquely relatively to insertion direction 12 of header plate 7.
- a space 14 having a predetermined shape for fitting of side edge portion 10 of header plate 7 is formed on side edge portion 11 of header cover 8 by bending side edge portion 11 of header cover 8, and into this space 14, side edge portion 10 of header plate 7 is fitted at a predetermined formation, as shown in Figs. 3A and 3B . Because side edge portion 10 of header plate 7 is fitted into space 14 with a predetermined shape at a predetermined formation, even if a small gap exists, the gap is easily filled by brazing, a good brazing condition between header cover 8 and header plate 7 is easily ensured.
- This space 14 with a predetermined shape is formed by bending side edge portion 11 of header cover 8 two times, the side edge portion 11 has a first bending portion 15 bent toward outside of header cover 8 and a second bending portion 16 bent toward inside of header cover 8.
- First bending portion 15 is bent obliquely relatively to insertion direction 12 of header plate 7, and second bending portion 16 is bent in a direction returned from the bending direction of first bending portion 15, obliquely relatively to insertion direction 12 of header plate 7.
- This bending structure can be achieved by totally two times of bending operations, and therefore, the number of bending operations can be decreased as compared with the structure in the aforementioned JP-A-2005-233570 which requires totally three times of bending operations, and the number of molds for bending operations can also be decreased.
- Side edge portion 10 of header plate 7 is formed in a curved shape by being bent toward the side of the heat exchanger core (the side of tubes 3 in Fig. 1 ), and the tip side portion of the curved shape forms the portion fitted into the above-described space 14 of header cover 8.
- the guiding by inclined surface 13 is carried out more easily and more smoothly.
- the distance between both side edge portions 11 of header cover 8 is slightly enlarged elastically by the guided side edge portions 10 of header plate 7, after side edge portions 10 of header plate 7 are fitted into spaces 14, the side edge portions 11 of header cover 8 enlarged in distance are elastically returned to the original positions so as to hold side edge portions 10 of header plate 7 in spaces 14, and by utilizing this elastic returning force, each side edge portion 10 of header plate 7 can be maintained at a predetermined fitting condition. Therefore, even if the caulking operation by using holding parts, as in the conventional structure, is not carried out, it becomes possible to keep the predetermined header structure before brazing.
- Header plate 7 and header cover 8 assembled into a predetermined formation as shown in Fig. 2 is brazed, for example, at a time in a furnace together with the heat exchanger core portion, and header 2 having a predetermined closed structure in cross section is completed.
- inclined surface 13 is formed by bending side edge portion 11 of header cover 8 in the above-described embodiment
- the inclined surface may be formed by cutting the side edge of header cover 8 obliquely relatively to insertion direction 12 of header plate 7.
- an inclined surface 26 for guiding side edge portion 25 of header plate 21 can be formed by cutting the tip (namely, the side edge) of side edge portion 24 of header cover 22. Also in such a structure, the same operation and advantage as those in the aforementioned embodiment can be obtained.
- the structure of the heat exchanger according to the present invention can be applied to any heat exchanger having a header comprising a header plate and a header cover, and particularly, it is suitable as a condenser and as a heat exchanger used in an air conditioning system for vehicles.
Abstract
Description
- The present invention relates to a heat exchanger, and specifically, to a structure of a header portion of the heat exchanger.
- As a structure of a header portion of a conventional heat exchanger, as shown in
Fig. 5 , known is a structure wherein aheader 104 is formed by assembling a tank forming member 101 (a header cover) formed as an arc shape in cross section and a tube attaching member 103 (a header plate) connected with tubes 102 (for example, Japanese Patent3,026,754 header 104, althoughtank forming member 101 andtube attaching member 103 are brazed to each other, a plurality ofholding parts 105 bent and projected are provided along a longitudinal direction of header 104 (a direction perpendicular to a sheet plane ofFig. 5 ) and temporary fixing is employed by caulking theseholding parts 105. - Further, another structure of a header portion of a conventional heat exchanger, also known is a structure wherein a connecting portion is formed by bending a side edge portion of a header plate, an enlarged width portion is formed on a side edge portion of a header cover so as to cover the connecting portion of the header plate from outside, and the side edge portion of the header plate and the side edge portion of the header cover are connected to each other by brazing (for example,
JP-A-2005-233570 - In the structure disclosed in Japanese Patent
3,026,754 - On the other hand, in the structure disclosed in
JP-A-2005-233570 - Accordingly, it would be desirable to provide a header structure of a heat exchanger in which an apparatus for manufacturing can be simplified including a decrease of the number of molds, a defect of a product such as a failure of brazing can be prevented from occurring, the operation for assembling a header plate and a header cover before brazing can be facilitated, and the design freedom can be increased.
- A heat exchanger according to the present invention has tubes in which heat exchange medium flows and a header to which ends of the tubes are connected, and is characterized in that the header comprises a header plate to which ends of the tubes are connected and a header cover which opens in one direction, a closed structure in cross section of the header is formed by inserting the header plate from an opening portion of the header cover into the header cover and fitting both side edge portions of the header plate into the header cover, and at least one side edge portion of the header cover has a surface inclined relatively to an insertion direction of the header plate for guiding a side edge portion of the header plate.
- In the above-described fitting of the header plate into the header cover, a relative fitting operation may be carried out. Namely, as an actual operation, the header plate may be moved relatively to the header cover in the direction for inserting and fitting the header plate into the header cover, or the header cover may be moved relatively to the header plate so that the header cover is fitted onto the outside of both side edge portions of the header plate.
- In such a structure of the heat exchanger according to the present invention, since the side edge portion of the header cover has an inclined surface for guiding the side edge portion of the header plate, the side edge portion of the header plate is smoothly guided along the inclined surface when the header plate is inserted into the header cover, and the side edge portion of the header plate is fitted into a predetermined position of the header cover easily and accurately. Namely, the side edge portion of the header cover, in particular, the inclined surface provided thereon, is used as a guide for assembling the header plate and the header cover. In this guiding, as described later, the side edge portion of the header cover is slightly deformed elastically so that the distance between both side edge portions of the header cover is slightly enlarged, after the side edge portion of the header plate is fitted into a predetermined position of the header cover, the side edge portion of the header cover which has been elastically deformed is returned to its original position, and the desired, predetermined formation for fitting the side edge portion of the header plate into the header cover can be maintained by utilizing the elastically returning force. In such a fitting operation, a predetermined formation for the fitting becomes possible by merely inserting the header plate into the header cover, and a so-called one touch fitting becomes possible. Therefore, it becomes possible to keep the predetermined header structure before brazing without employing the caulking operation by using holding parts as in the conventional structure, and it becomes possible to simplify the header structure, to simplify the apparatus for manufacturing by making caulking operation unnecessary, and to prevent occurrence of defects of products due to caulking operation. Further, because it is not necessary to provide holding parts at a predetermined interval, restriction on design can be greatly relieved, and the design freedom can be greatly increased.
- In this heat exchanger according to the present invention, the inclined surface can be formed by cutting a side edge of the header cover obliquely relatively to the insertion direction of the header plate. Alternatively, or together with the cutting, the inclined surface can be formed by bending the side edge portion of the header cover obliquely relatively to the insertion direction of the header plate. In any case, the inclined surface for guiding the side edge portion of the header plate can be very easily formed on the side edge portion of the header cover.
- Further, it is preferred that a space for fitting of the side edge portion of the header plate is formed on the side edge portion of the header cover by bending the side edge portion of the header cover. By forming the space with a predetermined shape, the side edge portion of the header plate may be stored in a predetermined position at a high accuracy merely by being inserted into the header cover, it may be easily fitted at a predetermined formation relatively to the side edge portion of the header cover, and the predetermined fitting formation may be maintained stably. Further, by forming the space with a predetermined shape, even if a small gap exists in the space after the fitting, the gap can be easily filled by brazing, and a good brazing condition between the header cover and the header plate can be easily ensured.
- In a case where such a space for fitting is formed, for example, a structure may be employed wherein a bent portion on the side edge portion of the header cover has a first bending portion bent toward outside of the header cover and a second bending portion bent toward inside of the header cover. Because such a bending structure can be achieved by totally two times of bending operations, the number of bending operations can be decreased as compared with the structure in the aforementioned
JP-A-2005-233570 - With respect to the header plate side, a fitting portion on the side edge portion of the header plate fitted into the header cover may be formed easily at a desirable form by bending the side edge portion of the header plate. In this case, it is preferred that the fitting portion on the side edge portion of the header plate fitted into the header cover is formed by bending the side edge portion of the header plate toward a side of a heat exchanger core. If bent toward a side opposite the heat exchanger core, it becomes difficult to guide the side edge portion of the header plate along the inclined surface of the header cover side. Further, if a bending portion for forming this fitting portion is formed in a curved shape, easier guiding along the inclined surface may be achieved, and easier operation for the insertion and the fitting of the header plate may be achieved.
- After both side edge portions of the header plate are fitted into the header cover at a predetermined formation before brazing as described above, the header plate and the header cover are brazed to each other, and a header having a predetermined sealability can be completed. This brazing may be carried out at a time in a furnace, together with the heat exchanger core portion.
- Such a heat exchanger according to the present invention is suitable, in particular, as a condenser. Further, it is suitable as a heat exchanger used for an air conditioning system for vehicles, which requires efficiency for mass production and cost down greatly.
- Thus, in the heat exchanger according to the present invention, the assembling of the header plate and the header cover can be facilitated, the header structure before brazing can be kept in a predetermined form even if caulking operation due to holding parts is not carried out as in the conventional structure, the number of bending processes (the number of molds) for processing the header cover can be decreased, and the design freedom can be increased.
- Further objects, features, and advantages of the present invention will be understood from the following detailed description of preferred embodiments of the present invention with reference to the accompanying figures.
- Embodiments of the invention now are described with reference to the accompanying figures, which are given by way of example only, and are not intended to limit the present invention.
-
Fig. 1 is a perspective view of a heat exchanger according to an embodiment of the present invention. -
Fig. 2 is an enlarged, partial, perspective view of a header of the heat exchanger depicted inFig. 1 . -
Figs. 3A and 3B are cross-sectional views showing a process for manufacturing the header depicted inFig. 2 . -
Fig. 4 is a cross-sectional view of a header of a heat exchanger according to another embodiment of the present invention. -
Fig. 5 is a cross-sectional view of a header of a conventional heat exchanger. -
- 1: heat exchanger
- 2, 23: header
- 3: tube
- 6: tube insertion hole
- 7, 21: header plate
- 8, 22: header cover
- 9: opening portion
- 10, 25: side edge portion of header plate
- 11, 24: side edge portion of header cover
- 12: insertion direction of header plate
- 13, 26: inclined surface
- 14: space
- 15: first bending portion
- 16: second bending portion
- Hereinafter, desirable embodiments of the present invention will be explained referring to the drawings.
-
Figs. 1-3 depict a heat exchanger according to an embodiment of the present invention, and show a heat exchanger, for example, used for an air conditioning system for vehicles, for example, as a condenser. InFig. 1 ,heat exchanger 1 has a pair ofheaders 2, a plurality oftubes 3 which are arranged in parallel to each other betweenheaders 2 so as to communicate betweenheaders 2 and in which heat exchange medium (for example, refrigerant) flows, and aninlet block 4 for introducing the heat exchange medium intoheat exchanger 1 and anoutlet block 5 for discharging the heat exchange medium fromheat exchanger 1 which are connected to one ofheaders 2. - In this embodiment,
header 2 is constructed as depicted inFigs. 2 and 3 .Header 2 has aheader plate 7 which has a plurality of tube insertion holes 6 into that the ends oftubes 3 are inserted and to which the ends oftubes 3 are connected by inserting the ends oftubes 3 into tube insertion holes 6, and aheader cover 8 which opens in one direction (at one side toward header plate 7).Header 2 having a closed structure in cross section is formed by relatively insertingheader plate 7 intoheader cover 8 from an opening portion 9 ofheader cover 8 and fitting bothside edge portions 10 ofheader plate 7 into both side edge portions I 1 ofheader cover 8. On at least oneside edge portion 11 of header cover 8 (in this embodiment, on both side edge portions 11), asurface 13 inclined relatively to aninsertion direction 12 ofheader plate 7 is formed for guidingside edge portion 10 ofheader plate 7. - In this embodiment, inclined
surface 13 is formed by bendingside edge portion 11 ofheader cover 8 obliquely relatively toinsertion direction 12 ofheader plate 7. Further, aspace 14 having a predetermined shape for fitting ofside edge portion 10 ofheader plate 7 is formed onside edge portion 11 ofheader cover 8 by bendingside edge portion 11 ofheader cover 8, and into thisspace 14,side edge portion 10 ofheader plate 7 is fitted at a predetermined formation, as shown inFigs. 3A and 3B . Becauseside edge portion 10 ofheader plate 7 is fitted intospace 14 with a predetermined shape at a predetermined formation, even if a small gap exists, the gap is easily filled by brazing, a good brazing condition betweenheader cover 8 andheader plate 7 is easily ensured. Thisspace 14 with a predetermined shape is formed by bendingside edge portion 11 ofheader cover 8 two times, theside edge portion 11 has afirst bending portion 15 bent toward outside ofheader cover 8 and asecond bending portion 16 bent toward inside ofheader cover 8. First bendingportion 15 is bent obliquely relatively toinsertion direction 12 ofheader plate 7, and second bendingportion 16 is bent in a direction returned from the bending direction offirst bending portion 15, obliquely relatively toinsertion direction 12 ofheader plate 7. This bending structure can be achieved by totally two times of bending operations, and therefore, the number of bending operations can be decreased as compared with the structure in the aforementionedJP-A-2005-233570 -
Side edge portion 10 ofheader plate 7 is formed in a curved shape by being bent toward the side of the heat exchanger core (the side oftubes 3 inFig. 1 ), and the tip side portion of the curved shape forms the portion fitted into the above-describedspace 14 ofheader cover 8. By bendingside edge portion 10 ofheader plate 7 toward the side of the heat exchanger core so as to form a curved shape convex toward the side ofheader cover 8, the guiding byinclined surface 13 is carried out more easily and more smoothly. - By providing
inclined surface 13 for guidingside edge portion 10 ofheader plate 7 onside edge portion 11 ofheader cover 8, particularly, on the tip ofside edge portion 11, as described above, whenheader plate 7 is inserted intoheader cover 8,side edge portion 10 ofheader plate 7 is guided smoothly alonginclined surface 13, and the guidedside edge portion 10 ofheader plate 7 is fitted into a predetermined position ofheader cover 8, that is, intospace 14, easily and accurately. At the time of this guiding, as shown inFigs. 3A and 3B , the distance between bothside edge portions 11 ofheader cover 8 is slightly enlarged elastically by the guidedside edge portions 10 ofheader plate 7, afterside edge portions 10 ofheader plate 7 are fitted intospaces 14, theside edge portions 11 ofheader cover 8 enlarged in distance are elastically returned to the original positions so as to holdside edge portions 10 ofheader plate 7 inspaces 14, and by utilizing this elastic returning force, eachside edge portion 10 ofheader plate 7 can be maintained at a predetermined fitting condition. Therefore, even if the caulking operation by using holding parts, as in the conventional structure, is not carried out, it becomes possible to keep the predetermined header structure before brazing. As a result, it becomes possible to simplify the header structure, to simplify the apparatus for manufacturing by making caulking operation unnecessary, and to prevent occurrence of defects of products due to caulking operation. Further, because it is made unnecessary to provide holding parts at a predetermined interval, restriction on design in the case of providing the holding parts disappears, and the design freedom can be greatly increased. -
Header plate 7 andheader cover 8 assembled into a predetermined formation as shown inFig. 2 is brazed, for example, at a time in a furnace together with the heat exchanger core portion, andheader 2 having a predetermined closed structure in cross section is completed. - Although
inclined surface 13 is formed by bendingside edge portion 11 ofheader cover 8 in the above-described embodiment, alternatively, or together with the bending, the inclined surface may be formed by cutting the side edge ofheader cover 8 obliquely relatively toinsertion direction 12 ofheader plate 7. For example, as depicted inFig. 4 , inheader 23 havingheader plate 21 andheader cover 22, aninclined surface 26 for guidingside edge portion 25 ofheader plate 21 can be formed by cutting the tip (namely, the side edge) ofside edge portion 24 ofheader cover 22. Also in such a structure, the same operation and advantage as those in the aforementioned embodiment can be obtained. - The structure of the heat exchanger according to the present invention can be applied to any heat exchanger having a header comprising a header plate and a header cover, and particularly, it is suitable as a condenser and as a heat exchanger used in an air conditioning system for vehicles.
Claims (13)
- A heat exchanger having tubes in which heat exchange medium flows and a header to which ends of said tubes are connected, characterized in that said header comprises a header plate to which ends of said tubes are connected and a header cover which opens in one direction, a closed structure in cross section of said header is formed by inserting said header plate from an opening portion of said header cover into said header cover and fitting both side edge portions of said header plate into said header cover, and at least one side edge portion of said header cover has a surface inclined relatively to an insertion direction of said header plate for guiding a side edge portion of said header plate.
- The heat exchanger according to claim 1, wherein said inclined surface is formed by cutting a side edge of said header cover obliquely relatively to said insertion direction of said header plate.
- The heat exchanger according to claim 1 or 2, wherein said inclined surface is formed by bending said side edge portion of said header cover obliquely relatively to said insertion direction of said header plate.
- The heat exchanger according to any preceding claim, wherein a space for fitting of said side edge portion of said header plate is formed on said side edge portion of said header cover by bending said side edge portion of said header cover.
- The heat exchanger according to claim 4, wherein a bent portion on said side edge portion of said header cover has a first bending portion bent toward outside of said header cover and a second bending portion bent toward inside of said header cover.
- The heat exchanger according to claim 5, wherein said first bending portion is bent obliquely relatively to said insertion direction of said header plate.
- The heat exchanger according to claim 5 or 6, wherein said second bending portion is bent obliquely relatively to said insertion direction of said header plate.
- The heat exchanger according to any preceding claim, wherein a fitting portion on said side edge portion of said header plate fitted into said header cover is formed by bending said side edge portion of said header plate.
- The heat exchanger according to claim 8, wherein said fitting portion on said side edge portion of said header plate fitted into said header cover is formed by bending said side edge portion of said header plate toward a side of a heat exchanger core.
- The heat exchanger according to claim 8 or 9, wherein a bending portion for forming said fitting portion is formed in a curved shape.
- The heat exchanger according to any preceding claim, wherein said header plate and said header cover are brazed to each other after both side edge portions of said header plate are fitted into said header cover.
- The heat exchanger according to any preceding claim, wherein said heat exchanger is a condenser.
- The heat exchanger according to any preceding claim, wherein said heat exchanger is a heat exchanger used for an air conditioning system for vehicles.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007064658A JP2008224151A (en) | 2007-03-14 | 2007-03-14 | Heat exchanger |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1970661A1 true EP1970661A1 (en) | 2008-09-17 |
Family
ID=39322663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08003605A Withdrawn EP1970661A1 (en) | 2007-03-14 | 2008-02-27 | Heat exchanger |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1970661A1 (en) |
JP (1) | JP2008224151A (en) |
CN (1) | CN101266093A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101788213B (en) * | 2009-01-22 | 2011-09-28 | 三花丹佛斯(杭州)微通道换热器有限公司 | Heat exchanger |
FR2968224B1 (en) * | 2010-12-07 | 2013-08-23 | Valeo Systemes Thermiques | SET OF TWO PIECES SET ONE ON THE OTHER |
CN102079038B (en) * | 2010-12-08 | 2013-02-13 | 三花控股集团有限公司 | Heat exchanger and refrigerant diversion tube thereof as well as method for processing refrigerant diversion tube |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0326754B2 (en) | 1984-05-07 | 1991-04-11 | Yokoi Kogyo Kk | |
US5727626A (en) * | 1993-07-20 | 1998-03-17 | Zexel Corporation | Header tank of heat exchanger |
EP0851201A1 (en) * | 1996-12-23 | 1998-07-01 | Valeo Thermique Moteur | Header box in two parts for condenser. |
US20010054496A1 (en) * | 2000-06-27 | 2001-12-27 | Yoshiharu Kajikawa | Heat exchanger having plural tubes connected to header tanks by brazing |
JP2005233570A (en) | 2004-02-23 | 2005-09-02 | T Rad Co Ltd | Aluminum heat exchanger |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0720524Y2 (en) * | 1989-09-29 | 1995-05-15 | 株式会社マルナカ | Pipe for refrigerant condenser |
JP3867647B2 (en) * | 2002-09-13 | 2007-01-10 | 株式会社デンソー | Stacked heat exchanger |
-
2007
- 2007-03-14 JP JP2007064658A patent/JP2008224151A/en active Pending
-
2008
- 2008-02-27 EP EP08003605A patent/EP1970661A1/en not_active Withdrawn
- 2008-03-14 CN CNA2008100858163A patent/CN101266093A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0326754B2 (en) | 1984-05-07 | 1991-04-11 | Yokoi Kogyo Kk | |
US5727626A (en) * | 1993-07-20 | 1998-03-17 | Zexel Corporation | Header tank of heat exchanger |
EP0851201A1 (en) * | 1996-12-23 | 1998-07-01 | Valeo Thermique Moteur | Header box in two parts for condenser. |
US20010054496A1 (en) * | 2000-06-27 | 2001-12-27 | Yoshiharu Kajikawa | Heat exchanger having plural tubes connected to header tanks by brazing |
JP2005233570A (en) | 2004-02-23 | 2005-09-02 | T Rad Co Ltd | Aluminum heat exchanger |
Also Published As
Publication number | Publication date |
---|---|
CN101266093A (en) | 2008-09-17 |
JP2008224151A (en) | 2008-09-25 |
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