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
• • 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
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/02—Header boxes; End plates
  • F28F9/0202—Header boxes having their inner space divided by partitions
  • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
  • F28F9/0214—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only longitudinal partitions
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F2225/00—Reinforcing means
  • F28F2225/08—Reinforcing means for header boxes

Definitions

• the present invention relates to a header suitably used for a heat exchanger such as a condenser and an evaporator for use in a refrigeration system for an automobile air-conditioner, and also relates to a method for manufacturing the header.
• the so-called header-type heat exchanger which is provided with a pair of headers and a plurality of heat exchanging tubes disposed in parallel with each other between the headers with opposite ends thereof communicated with the headers, is widely used.
• a header having a flat cross-section such as an elliptical cross-section, an oval cross-section or a rectangular cross-section.
• 1 includes two members , that is , a first peripheral wall member
• the first peripheral wall 5 member 2 includes a base wall 2a in which a plurality of tube insertion apertures 2c are formed at predetermined intervals along the longitudinal direction of the base wall 2a and a pair of joining portions 2b and 2b provided at lateral sides of the base wall 2a.
• the second peripheral wall member 3 includes an opposite wall 3a
• the first peripheral wall member 2 and the second peripheral wall member 3 are coupled together, and the side walls 3b and 3b are joined to the joining portions 2b and 2b by pinching processing
• header 1 for use in heat exchangers, a plurality of heat exchanging tubes 5 disposed in parallel with each other are inserted into corresponding tube insertion apertures 2c and fixed therein to thereby fabricate a header-type heat exchanger .
• the thickness of the peripheral wall member 2 and 3 becomes smaller in accordance with the request that the header be smaller in size and lighter in weight . Therefore, it is difficult to secure predetermined pressure resistance only by the peripheral wall members 2 and 3. To cope with the problems, it is considered to provide a reinforcing partition 4 in the header 1 as shown by the phantom line.
• this header 1 having the aforementioned configuration cannot be manufactured by using an electric resistance weld pipe and therefore has to be manufactured by welding or pinching the wall members 2 and 3. This causes not only a complicated configuration but also an increased number of parts, resulting in complicated assembling operation and an increased manufacturing cost.
• the reinforcing partition 4 is assembled within the header 1, it is necessary to form a number of cut-out portions 4a in the partition 4 by machining processing or the like so as not to impede the insertion of the heat exchanging tube 5 into the header 1. This requires an adoption of troublesome machining processing and increases the number of processing steps, which in turn increases the manufacturing cost.
• a header for use in heat exchangers includes a base wall with a plurality of tube insertion apertures for inserting heat exchanging tubes formed at predetermined intervals in a longitudinal direction of the base wall, an opposite wall opposed to the base wall, a pair of side walls disposed at both lateral sides of the base wall and the opposite wall and connecting the lateral sides, and a reinforcing wall disposed between the base wall and the opposite wall along a longitudinal direction thereof and connecting the base wall to the opposite wall.
• the side walls are integrally formed at both lateral sides of the base wall by bending processing.
• a first half of the opposite wall constituting one half of the opposite wall is integrally formed at a side of one of the side walls by bending processing.
• a second half of the opposite wall constituting the other half of the opposite wall is integrally formed at a side of the other of the side walls by bending processing.
• the reinforcing wall is integrally formed at at least one of sides of the first half of the opposite wall and the second half of the opposite wall by bending processing.
• the base wall, the side walls, the opposite wall and the reinforcing wall are integrally formed by bending processing, it is not required to perform joining processing of these members, such as brazing processing or pinching processing, and it becomes possible to reduce the number of parts. Furthermore, since the reinforcing wall is disposed between the base wall and the opposite wall, it is possible to assuredly obtain sufficient strength against the inner pressure. It is preferable that the reinforcing wall is formed at each side of the first half of the opposite wall and the second half of the opposite wall. In this case, since there are two reinforcing walls, it becomes possible to further enhance the pressure resistance. It is preferable that a side edge of the reinforcing wall opposed to the base wall is integrally brazed to the base wall.
• the reinforcing wall is provided with tube engaging cut-out portions formed at positions corresponding to the plurality of tube insertion apertures, whereby each end of the plurality of heat exchanging tubes inserted into the tube insertion apertures is engaged with the tube engaging cut-out portion in a positioned manner.
• the tube insertion amount adjustment can be performed more easily and accurately, and the tube insertion operation can be performed smoothly.
• the reinforcing wall is provided with insertion ledges at the side edge thereof opposed to the base wall, and the base wall is provided with insertion ledge engaging apertures at positions corresponding to the insertion ledges, and the insertion ledges are inserted into the insertion ledge engaging apertures and engaged therewith.
• the insertion ledges of the reinforcing wall are engaged with and fixed to the insertion ledge engaging apertures, it becomes possible to avoid problems such as springback.
• the provisional assembly can be maintained stably after the bending processing until the brazing processing, which enables to maintain the high dimensional accuracy.
• the insertion ledges are integrally brazed to the base wall with the insertion ledges inserted into the insertion ledge engaging apertures.
• a peripheral edge of the tube insertion aperture is inwardly bent .
• the heat exchanging tube is guided smoothly by the peripheral edge of the tube insertion aperture at the time of inserting the tube into the tube insertion aperture. Therefore, the tube insertion operation can be performed more easily. Furthermore, the joining area between the tube and the tube insertion aperture can be kept larger, which in turn enables to obtain reliable air-tightness of the joined portion.
• a header for use in heat exchangers comprises: a base wall with a plurality of tube insertion apertures for inserting heat exchanging tubes formed at predetermined intervals in a longitudinal direction of the base wall; an opposite wall opposed to the base wall; a pair of side walls disposed at both lateral sides of the base wall and the opposite wall and connecting the lateral sides ; and a reinforcing wall disposed between the base wall and the opposite wall along a longitudinal direction thereof and connecting the base wall to the opposite wall, wherein the side walls are integrally formed at both lateral sides of the base wall by bending processing, wherein a first half of the opposite wall constituting one half of the opposite wall is integrally formed at a side of one of the side walls by bending processing, wherein a second half of the opposite wall constituting the other half of the opposite wall is integrally formed at a side of the other of the side walls by bending processing, and wherein the reinforcing wall is integrally formed at respective sides of the first half
• the insertion ledge engaging apertures are formed along the longitudinal direction of the header in a zigzag manner.
• a tip portion of the insertion ledge is inserted into the insertion ledge engaging aperture, and the tip portion, of the insertion ledge is bent and engaged with an external surface of the base wall.
• the bent portion is formed by bending the tip portion of the insertion ledge by caulking processing.
• the aforementioned header for use in heat exchangers can be manufactured by the following method.
• the header in a method for manufacturing a header for use in heat exchangers in which the header includes a base wall with a plurality of tube insertion apertures for inserting heat exchanging tubes formed at predetermined intervals in a longitudinal direction of the base wall, an opposite wall opposed to the base wall, a pair of side walls disposed at both lateral sides of the base wall and the opposite wall and connecting the lateral sides, and a reinforcing wall disposed between the base wall and the opposite wall along a longitudinal direction thereof and connecting the base wall to the opposite wall, the method comprises: a step for preparing a formed plate, the formed plate including a base wall region having the plurality of tube insertion apertures and extending in a longitudinal direction of the formed plate, a pair of side wall regions formed at both lateral sides of the base wall region and extending in the longitudinal direction, a first half region of an opposite wall formed at one of lateral sides of the base wall region and extending in the longitudinal direction, a second half region of an opposite wall
• the reinforcing wall region is formed at each side of the first half region and the second half region of the opposite wall.
• the tube engaging cut-out portions are formed at portions of the reinforcing wall corresponding to the plurality of tube insertion apertures such that ends of the heat exchanging tubes inserted in the tube insertion apertures are engaged with the engaging cut-out portions in a positioned manner.
• insertion ledges are formed at a base wall side edge of the reinforcing wall and insertion ledge engaging apertures are formed at positions of the base wall corresponding to the insertion ledges, further comprising a step of inserting the insertion ledges into the insertion ledge engaging apertures.
• the formed plate is formed by die-cutting and pressing a brazing sheet with a brazing layer clad on at least one surface thereof . ⁇ ⁇
• the fourth aspect of the present invention specifies the heat exchanger using the header according to the first aspect of the present invention.
• a heat exchanger comprises: a pair of headers for use in heat exchangers; and a plurality of heat exchanging tubes disposed in parallel with each other between the pair of headers with opposite ends thereof communicated with the headers , wherein at least one of the pair of headers includes: a base wall with a plurality of tube insertion apertures for inserting the heat exchanging tubes formed at predetermined intervals in a longitudinal direction of the base wall; an opposite wall opposed to the base wall; a pair of side walls disposed at both lateral sides of the base wall and the opposite wall and connecting the lateral sides; and a reinforcing wall disposed between the base wall and the opposite wall along a longitudinal direction thereof and connecting the base wall to the opposite wall.
• the side walls are integrally formed at both lateral sides of the base wall by bending processing, wherein a first half of the opposite wall constituting one half of the opposite wall is integrally formed at a side of one of the side walls by bending processing, wherein a second half of the opposite wall constituting the other half of the opposite wall is integrally formed at a side of the other of the side walls by bending processing, and wherein the reinforcing wall is integrally formed at at least one of sides of the first half of the opposite wall and the second half of the opposite wall by bending processing.
• the same functions and effects as mentioned above can be obtained since the heat exchanger uses the headers according to the first aspect of the present invention.
• the reinforcing wall is provided with tube engaging cut-out portions formed at positions corresponding to the plurality of tube insertion apertures, whereby each end of the plurality of heat exchanging tubes inserted into the tube insertion apertures is engaged with the tube engaging cut-out portion in a positioned manner.
• each end of the plurality of heat exchanging tubes is brazed to the header.
• the fifth aspect of the present invention specifies the heat exchanger using the headers .according to the second aspect of the present invention.
• a heat exchanger comprises: a pair of headers for use in heat exchangers; and a plurality of heat exchanging tubes disposed in parallel with each other between the pair of headers with opposite ends thereof communicated with the headers , wherein at least one of the pair of headers includes: a base wall with a plurality of tube insertion apertures for inserting the heat exchanging tubes formed at predetermined intervals in a longitudinal direction of the base wall; an opposite wall opposed to the base wall; a pair of side walls disposed at both lateral sides of the base wall and the opposite wall and connecting the lateral sides; and reinforcing walls disposed between the base wall and the opposite wall along a longitudinal direction thereof and connecting the base wall to the opposite wall, wherein the side walls are integrally formed at both lateral sides of the base wall by bending processing, wherein a first half of the opposite wall constituting one half of the opposite wall is integrally formed at a side of one of the side walls by bending processing, wherein a second half of
• the reinforcing wall is provided with tube engaging cut-out portions formed at positions corresponding to the plurality of tube insertion apertures , whereby each end of the plurality of heat exchanging tubes inserted into the tube insertion apertures is engaged with the tube engaging cut-out portion in a positioned manner .
• each end of the plurality of heat exchanging tubes is brazed to the header.
• the insertion ledge engaging apertures are formed in a zigzag manner in the longitudinal direction of the header.
• a manufacturing method of a heat exchanger comprises: a step for preparing a pair of headers for use in heat exchangers ; a step for preparing a plurality of heat exchanging tubes; and a step for disposing the plurality of heat exchanging tubes in parallel with each other between the pair of headers with opposite ends thereof communicated with the headers , wherein at least one of the pair of headers includes : a base wall with a plurality of tube insertion apertures for inserting heat exchanging tubes formed at predetermined intervals in a longitudinal direction of the base wall; an opposite wall opposed to the base wall; a pair of side walls disposed at both lateral sides of the base wall and the opposite wall and connecting the lateral sides; and a reinforcing wall disposed between the base wall and the opposite wall along a longitudinal direction thereof and connecting the base wall to the opposite wall, where
• the step for preparing the header comprises: a step for preparing a formed plate, the formed plate including a base wall region having the plurality of tube insertion apertures and extending in a longitudinal direction of the formed plate, a pair of side wall regions formed at both lateral sides of the base wall region and extending in the longitudinal direction, a first half region of an opposite wall formed at one of lateral sides of the base wall 1 region and extending in the longitudinal direction, a second half region of an opposite wall formed at the other of lateral sides of the base wall region and extending in the longitudinal direction, and a reinforcing wall region formed at at least one of the first half and second half regions of the opposite wall and extending in the longitudinal direction; a step for bending the reinforcing wall region relative to the first half region of the opposite wall and/or the second half region of the opposite wall;
• each end of the plurality of heat exchanging tubes is brazed to the header.
• a manufacturing method of a heat exchanger comprises: a step for preparing a pair of headers for use in heat exchangers; a step for preparing a plurality of heat exchanging tubes; and a step for disposing the plurality of heat exchanging tubes in parallel with each other between the pair of headers with opposite ends thereof communicated with the headers , wherein at least one of the pair of headers includes : a base wall with a plurality of tube insertion apertures for inserting heat exchanging tubes formed at predetermined intervals in a longitudinal direction of the base wall; an opposite wall opposed to the base wall; a pair of side walls disposed at both lateral sides of the base wall and the opposite wall and connecting the lateral sides; and reinforcing walls disposed between the base wall and the opposite wall along a longitudinal direction thereof and connecting the base wall to the opposite wall, wherein the side walls are integrally formed at both lateral sides of the base wall by bending processing, wherein a first half of the opposite wall constituting one half
• the base wall is provided with insertion ledge engaging apertures at positions corresponding to the insertion ledges
• the step for preparing the pair of header comprises : a step for preparing a formed plate, the formed plate
• a base wall region having the plurality of tube insertion apertures and extending in a longitudinal direction of the formed plate, a pair of side wall regions formed at both lateral sides of the base wall region and extending in the longitudinal direction, a first half region of an opposite wall formed at one of lateral
• each end of the plurality of heat exchanging tubes is brazed to the header.
• Fig. 1 is an exploded perspective view showing a header and therearound applied to a heat exchanger according to a first embodiment of the present invention.
• Fig.2A is a front view of the header for use in heat exchangers
• Fig. 2B is a side view thereof.
• Fig.3 is a cross-sectional view of the header for use in heat exchangers .
• Fig. 4 is an enlarged side cross-sectional view showing the tube insertion aperture of the header and therearound.
• Fig. 5 is a cross-sectional view taken along the line 5-5 in Fig. 3.
• Fig. 6A is a cross-sectional view taken along the line 6- 6 in Fig. 3, and Fig. 6B is an enlarged cross-sectional view of the portion surrounded by the alternate long and short dash line in Fig. 6A.
• Fig. 7 is a perspective view showing a press formed plate for manufacturing the header of the embodiment .
• Fig. 8 is a plane view showing the press formed plate.
• Fig.9 is a side view showing a header and therearound applied to a heat exchanger according to a second embodiment of the present invention.
• Fig..10 is a cross-sectional view showing the header for use in heat exchangers according to the second embodiment.
• Fig. 11A is a cross-sectional view taken along the line 11-11 in Fig. 10, and Fig. 11B is an enlarged cross-sectional view of the portion surrounded by the alternate long and short dash line in Fig. 11A.
• Fig. 12 is a perspective view showing a press formed plate for manufacturing the header of the second embodiment.
• Fig. 13 is a plane view showing the press formed plate of the second embodiment.
• Figs. 14A to 14E are enlarged cross-sectional views showing the connecting portion of the reinforcing wall and the base wall of the header for use in heat exchangers and therearound according to a modification of the present invention.
• Figs. 15A and 15B are enlarged cross-sectional views showing the connecting portion of the reinforcing wall and the base wall of the header for use in heat exchangers and therearound according to another modification of the present invention.
• Fig.16 is an exploded perspective view showing a conventional rectangular header for heat exchangers and therearound.
• Figs . 1 to 6 show a header 10 for use in heat exchangers according to a first embodiment of the present invention.
• the header 10 includes a belt-shaped base wall 20, an opposite wall 30 to be opposed to the base wall 20, a pair of side walls 40a and 40b disposed between the lateral sides of the base wall 20 and the opposite wall 30 and a pair of reinforcing walls 50a and 50b disposed between the base wall 20 and the opposite wall 30 at the widthwise central position thereof and extending in the longitudinal direction of the header 10.
• this header 10 is an integrally formed article obtained by bending a press formed plate 11 having a predetermined shape formed by die-cut press forming.
• the press formed plate 11 is a wide belt-shaped plate.
• the plate 11 has a base wall region 21 extending in the longitudinal direction of the plate 11 at the widthwise-middle region of the plate 11.
• the base wall region 21 will constitute the aforementioned base
• L0 region 31a extending in the longitudinal direction is integrally provided.
• This first half opposite wall region 31a will constitute a first half 30a of the aforementioned opposite wall 30.
• a second half opposite wall region 31b extending in the longitudinal direction is integrally provided at the side of the other side wall region 41b.
• This second half opposite wall region 31b will constitute a second half 30b of the aforementioned opposite wall 30. Furthermore, at the sides of the first half opposite wall region 31a and the second half opposite wall region 31b, reinforcing wall regions 51a and 51b extending in the longitudinal direction are provided.
• reinforcing wall regions 51a and 51b will constitute the aforementioned reinforcing walls 50a and 50b.
• .5 insertion apertures 23 each extending the widthwise direction of the base wall region 21 are provided at certain intervals in the longitudinal direction of the base wall region 21.
• the peripheral portion 23a of the tube insertion aperture 23 is curved inwardly, i.e., toward the inside of the header to be formed by burring
• a plurality of square-shaped insertion ledge engaging apertures 25 are formed at certain intervals so as to be located between the adjacent tube insertion apertures 23.
• LO wall region 51a and 51b corresponding to the aforementioned tube insertion apertures 23 a plurality of tube engaging cut-out portions 53a and 53b are formed at predetermined intervals in the longitudinal direction of the reinforcing wall region 51a and 51b. Furthermore, at the side edge of the reinforcing wall region 51a
• a plurality of rectangular-shaped insertion ledges 55a and 55b corresponding to the aforementioned tube insertion ledge engaging apertures 25 are formed at predetermined intervals in the longitudinal direction of the plate 11.
• L0 limited to the aforementioned embodiment, and may be changed arbitrarily.
• the header 10 for use in heat exchangers is manufactured.
• the side wall regions 41a and 41b constitute
• the first half opposite wall region 31a constitutes one half 30a of the opposite wall 30
• the second half opposite wall region 31b constitutes the other half 30b of the opposite wall 30
• the reinforcing wall regions 51a and 51b constitute the reinforcing walls 50a and 50b.
• the tube engaging cut-out portions 53a and 53b of the reinforcing walls 50a and 50b are disposed so as to face the corresponding tube insertion apertures 23 of the base wall 20.
• tube insertion aperture 23 formed in the base wall 20 are bent outwardly in accordance with the aforementioned bending processing to constitute tube insertion guides 23b.
• end portions of a plurality of heat 5 exchanging tubes 60 disposed in parallel with each other via a corrugated fin 70 are inserted into the corresponding tube insertion apertures 23 of the header 10 to engage with the tube engaging cut-out portions 53a and 53b of the reinforcing walls 50a and 50b formed in the header 10 in a positioned manner.
• L5 exchanging tube 60 into the tube insertion aperture 23 can be performed easily. Furthermore, since the positioning of the tube 60 is completed by engaging the tube end with the tube engaging cut-out portions 53a and 53b, the insertion amount of the tube 60 and the like can be performed automatically, which enables an easy
• a heat exchanger which is provided with a pair of headers 10, a plurality of heat exchanging tubes 60 disposed in parallel with each other with opposite ends thereof communicated with the headers 10 and 10 and corrugated fins 70 interposed between
• the press formed plate 11 constituting the header 10 and the heat exchanging tube 60 is made of a brazing sheet in which a brazing layer is clad on at least one surface of a bare member or a plate with a brazing layer in which brazing materials such as powder brazing materials are given to at least one surface of a bare member.
• a provisionally assembled heat exchanger is obtained by alternatively stacking the heat exchanging tubes 60 and the corrugated fins 70 between the pair of headers 10. Then, the provisionally assembled heat exchanger is brazed in a furnace, thereby obtaining a heat exchanger.
• the header 10 for use in heat exchangers, since the header 10 is obtained by bending a press formed plate 11, the header 10 can be manufactured efficiently only by performing a series of bending press working.
• header 10 of this embodiment is manufactured by using only one sheet of the press formed plate 11, it is not necessary to perform troublesome joining processing such as brazing processing and/or pinching processing. This results in a decreased number of parts, simplified assembling operation and a reduced manufacturing cost .
• the header 10 of this embodiment since the reinforcing walls 50a and 50b are disposed between the base wall 20 and the opposite wall 30, sufficient strength against inner pressure can be obtained. Accordingly, the header 10 can be applied to a refrigeration cycle using C0 2 refrigerant in which high pressure resistance is required strictly.
• the tube engaging cut-out portions 53a and 53b of the reinforcing walls 50a and 50b can be formed by the die-cut press forming at the time of obtaining the press formed plate 11, it is not necessary to perform troublesome work such as machining work for forming the cut-out portions, resulting in easier manufacturing of the header.
• the insertion ledges 55a and 55b are formed at the side edges of the reinforcing wall regions 51a and 51b of the press formed plate 11 and the insertion ledge engaging apertures 25 are formed in the base wall region 21, and then the insertion ledge 55a and 55b are inserted in the insertion ledge engaging apertures 25 in a positioned manner at the time of bending processing of the press formed plate 11. Accordingly, faults such as springback due to the bending of the plate can be prevented, thereby stabilizing the configuration of the provisionally assembled article. Thus, the stabilized configuration of the assembled article can be maintained until the brazing processing after the completion of the bending processing, resulting in enhanced dimensional accuracy and high quality.
• the tube 60 can be guided smoothly at the time of inserting the tube 60 into the aperture 23.
• the tube insertion can be performed easily.
• the inwardly curved peripheral portion 23a of the tube insertion aperture 23 increases the joining area between the peripheral portion 23a and the tube 60, resulting in enhanced air-tightness therebetween, which in turn further enhances quality and reliability of the header.
• Figs. 9 to 13 show a header 10 for use in heat exchangers according to a second embodiment of the present invention.
• the press formed plate 11 constituting the header 10 is provided with a base wall region 21, side wall regions 41a and 41b, a first half opposite wall region 31a, a second half opposite wall region 31b and first and second reinforcing wall regions 51a and 51b.
• tube insertion apertures 23 are provided at certain intervals .
• insertion ledges 55a and 55b are formed alternatively in the longitudinal direction of the plate 11. Furthermore, between the adjacent tube insertion apertures 23 in the base wall region 21, a first insertion ledge engaging aperture 25a and a second insertion ledge engaging aperture 25b corresponding to the insertion ledges 55a and 55b are formed alternatively in a zigzag manner.
• tip portions of the insertion ledges 55a and 55b are bent outwardly by caulking processing, whereby the bent portions 80a and 80b are engaged with the external surface of the base wall 20.
• the header 10 for use in heat exchangers is manufactured.
• the insertion ledges 55a and 55b formed at the side edges of the reinforcing regions 51a and 51b of the press formed plate 11 are formed alternatively along the longitudinal direction of the header between the first
• the tip portions of the insertion ledges 55a and 55b are bent outwardly by caulking processing so that the bent portions 80a and 80b are engaged with the external surface of the base wall 20, stronger engaging status can be obtained and the number of insertion ledges 55a and 55b can be decreased, resulting in decreased amount of materials. Accordingly, the manufacturing cost can be decreased. Furthermore, since the tip portion of the insertion ledge is caulked and fixed, faults such as spring back due to a bending process can be prevented more assuredly, thereby stabilizing the configuration. Accordingly, the dimensional accuracy can be further improved, and therefore header products with higher quality can be obtained.
• the tip portions of the reinforcing walls 50a and 50b are inserted into and engaged with the base wall 20.
• the present invention is not limited to the above.
• the tip ends of the reinforcing walls 50a and 50b may be brazed to the inner surface of the base wall 20 with the tip ends abutted thereto.
• the outwardly bent tip portions of the reinforcing walls 50a and 50b may be brazed to the 5 inner surface of the base wall 20.
• the larger joining area between the reinforcing walls 50a and 50b and the base wall 20 can be secured, which assuredly prevents generation of faults such as poor brazing.
• two tip portions of L0 the reinforcing walls 50a and 50b may be secured to the base wall 20 by another methods other than the aforementioned methods.
• the reinforcing walls 50a and 50b may be brazed to the base wall 20 in the state in which the tip end of the first reinforcing wall 50a abuts against the L5 inner surface of the base wall 20 while the insertion ledge 55b of the second reinforcing wall 50b is inserted into the base wall 20.
• the reinforcing walls 50a and 50b may be brazed to the base wall 20 in the state in which
• the tip end of the first reinforcing wall 50a abuts against the inner surface of the base wall 20 while the bent tip portion 81b of the second reinforcing wall 50b abuts against the base wall 20.
• the reinforcing walls 50a and 50b may be brazed to the base wall 20 in the state in which
• the bent tip portion 81a of the first reinforcing wall 50a abuts against the inner surface of the base wall 20 while the insertion ledge 55b of the second reinforcing wall 50b abuts against the base wall 20.
• the tip portion of the reinforcing walls 50a and 50b continuously extend along the longitudinal direction of the reinforcing walls .
• the reinforcing walls 50a and 50b may be brazed to the base wall 20 in the state in which the bent tip portions 81a and 81b formed at certain intervals along L0 the longitudinal direction of the reinforcing walls 50a and 50b abut against the base wall 20 while the end portions between the bent tip portions abut against the base wall 20.
• the reinforcing walls 50a and 50b may be brazed to the base wall 20 in the state in which L5 the bent tip portions 81a and 81b formed at certain intervals along the longitudinal direction of the reinforcing walls 50a and 50b abut against the base wall 20 while the end portions 55b between the bent tip portions are inserted into the base wall 20.
• two reinforcing walls 50a 25 and 50b are provided.
• a reinforcing wall region may be provided at either the first half opposite wall region 31a or the second half opposite wall region 31b.
• one of the aforementioned reinforcing walls 50a and 50b may be omitted.
• the base wall, the side walls , the opposite wall and the reinforcing wall are integrally formed by bending processing, it is not necessary to perform troublesome joining processing such as brazing processing or
• the reinforcing wall can be fixed to the base wall more assuredly.
• faults such as springback can be prevented assuredly, and the configuration of the provisional header can be stabilized.
• the joining area of the reinforcing wall to the base plate can be increased. Accordingly, it becomes possible to more assuredly prevent securing faults such as brazing faults.
• the peripheral portion of the tube insertion aperture is curved inwardly, at the time of inserting the tube into the tube insertion aperture, the peripheral portion guides the tube. Therefore, the tube can be inserted easily. Furthermore , larger joining area between the tube and the peripheral portion of the tube insertion aperture can be obtained, resulting in enhanced air-tightness therebetween, which in turn enhances the quality and reliability.
• the same effects as mentioned above can be obtained since the method specifies one of the manufacturing processes of the aforementioned header.
• the same effects as mentioned above can be obtained since the heat exchanger uses the aforementioned headers for use in heat exchangers . Furthermore, according to the method for manufacturing the header according to the present invention, the same effects as mentioned above can be obtained since the method uses the aforementioned headers for use in heat exchangers .
• the header can be suitably used for a heat exchanger such as a condenser and an evaporator for use in a refrigeration system for an automobile air-conditioner.
• a heat exchanger such as a condenser and an evaporator for use in a refrigeration system for an automobile air-conditioner.

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• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

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• 2002
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  • 2002-03-28 EP EP02708722A patent/EP1485665A4/de not_active Withdrawn
  • 2002-03-28 WO PCT/JP2002/003154 patent/WO2002079708A2/en active Application Filing
  • 2002-03-28 KR KR10-2003-7012649A patent/KR20040005902A/ko not_active Application Discontinuation
  • 2002-03-28 CN CNA028070240A patent/CN1599859A/zh active Pending
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