US20050279485A1 - Stacking-type, multi-flow, heat exchangers and methods for manufacturing such heat exchangers - Google Patents
Stacking-type, multi-flow, heat exchangers and methods for manufacturing such heat exchangers Download PDFInfo
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- US20050279485A1 US20050279485A1 US11/150,139 US15013905A US2005279485A1 US 20050279485 A1 US20050279485 A1 US 20050279485A1 US 15013905 A US15013905 A US 15013905A US 2005279485 A1 US2005279485 A1 US 2005279485A1
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- tube plates
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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
- F28D1/03—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 plate-like or laminated conduits
- F28D1/0308—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other
- F28D1/0325—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
- F28D1/0333—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members
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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
- F28D2021/0085—Evaporators
Definitions
- the present invention relates to stacking-type, multi-flow, heat exchangers.
- Each heat exchanger comprises a plurality of heat transfer tubes and outer fins, which are stacked alternatively.
- Each such tube is formed by a pair of tube plates.
- the present invention also relates to methods for manufacturing such heat exchangers.
- each heat transfer tube is formed by a pair of tube plates and in which an inner fin is provided in a fluid passage formed in the heat transfer tube, is known.
- Tube plate 11 is formed, for example, as depicted in FIG. 3 .
- Cup portions 12 , 13 , 14 , and 15 protrude outward and are formed on the longitudinal end portions of tube plate 11 .
- Communication holes 16 , 17 , 18 , and 19 are formed through in cup portions 12 , 13 , 14 , and 15 , respectively.
- protruded portions 20 and 21 extend in the longitudinal direction of tube plate 11 and are configured to form fluid passages in heat transfer tube 2 .
- Heat transfer tube 2 is formed by connecting (e, brazing) a pair of such tube plates 11 to each other after temporarily fixing them to each other.
- each heat transfer tube 2 is formed, for example, as follows. After a flux is applied to the inside of a pair of tube plates 11 , an inner fin (not shown) is inserted into a fluid passage is formed by protruded portions 20 and 21 . As depicted in FIGS. 8A and 8B , after a raised portion 27 formed on a first tube plate 11 , raised potion 27 is inserted into a hole 28 formed through a second tube plate 11 ′, both tube plates 11 and 11 ′ are fixed to each other by expanding the diameter of the tip portion of raised portion 27 by a punch 29 .
- tube plates such as those depicted in FIGS. 4-7 , are required.
- a total of four kinds of tube plates are depicted.
- a tube plate 22 is depicted in FIG. 4 , in which cup portions 12 and 14 communicate with each other, and in which hole 28 is provided at a first side of the communication portion (i e., a communication plate).
- a tube plate 23 is depicted in FIG. 5 , in which cup portions 12 and 14 communicate with each other, and in which raised portion 27 is formed at the first side of the communication portion (i.e., a communication plate).
- a tube plate 24 is depicted in FIG.
- a tube plate 25 is depicted in FIG. 7 , in which respective cup portions are independent from each other.
- tube plates 25 formed by pressing are rotated alternatively by an angle of 180 degrees.
- Tube plates 25 then are combined as a pair of tube plates, raised portion 27 of one tube plate 25 is inserted into hole 28 of the other tube plate 25 , and the diameter of the tip portion of the inserted raised portion 27 is expanded.
- two kinds of tube plates, tube plates 22 and 23 which differ from each other in the positions of raised portion 27 and hole 28 , are required.
- a need has arisen to provide stacking-type, multi-flow, heat exchangers, which may reduce the number of kinds of tube plates used for forming heat transfer tubes, and which may improve significantly the efficiency of assembling the heat transfer tubes, in particular, when fixing a pair of tube plates to each other.
- a need also has arisen for methods for manufacturing such heat exchangers.
- the stacking-type, multi-flow, heat exchanger comprises a plurality of heat transfer tubes and a plurality of outer fins, which are stacked alternatively.
- Each heat transfer tube comprises a pair of tube plates connected together to form a fluid passage in each heat transfer tube.
- Each heat transfer tube comprises raised portions fixing the pair of tube plates to each other. The raised portions are further formed by elongating or raising a portion of the pair of tube plates substantially simultaneously at a position at which a pair of holes, each of which is formed through one of the pair of tube plates, are aligned.
- the tube plates may be fixed to each other more securely.
- an inner fin may be disposed in the fluid passage in each heat transfer tube, and the inner fin may extend in a longitudinal direction of each heat transfer tube.
- the inner fin may be a waved fin.
- a method for manufacturing a stacking-type, multi-flow, heat exchanger comprising a plurality of heat transfer tubes and a plurality of outer fins, which are stacked alternatively, also is provided.
- Each heat transfer tube is formed by connecting a pair of tube plates to form a fluid passage in each heat transfer tube.
- the method comprises the steps of forming a hole through each of the pair of tube plates, positioning the pair of tube plates, so that the holes of the pair of tube plates are aligned, and elongating or raising a portion of the pair of tube plates substantially simultaneously at a position at which the holes are aligned for fixing the pair of tube plates to each other.
- diameters of tip portions of raised portions, formed by the step of elongating are enlarged.
- a raised portion is formed by elongating or raising a portion of the plates at a position at which the holes are aligned, for example, by fit-inserting a punch into the holes.
- the raised portions are formed on both tube plates substantially simultaneously, as a part of each tube plate at the position at which the holes are aligned. Therefore, complicated steps, such as inserting a raised portion into a hole, are not necessary.
- the number of types of tube plates may be reduced.
- the efficiency of assembling a heat transfer tube when fixing a pair of tube plates to each other may be significantly increased.
- FIG. 1 is a plan view of a stacking-type, multi-flow, heat exchanger, according to an embodiment of the present invention.
- FIG. 2 is an overhead or top view of the heat exchanger depicted in FIG. 1 , as viewed along Line II-II of FIG. 1 .
- FIG. 3 is a perspective view of a tube plate for use in a known heat exchanger.
- FIG. 4 is a plan view of a tube plate for use in a known heat exchanger.
- FIG. 5 is a plan view of another tube plate for use in a known heat exchanger.
- FIG. 6 is a plan view of still another tube plate for use in a known heat exchanger.
- FIG. 7 is a plan view of yet another tube plate for use in a known heat exchanger.
- FIGS. 8A and 8B are partial, cross-sectional views of a heat transfer tube, showing steps for fixing a pair of tube plates to each other in a method for manufacturing a known heat exchanger.
- FIG. 9 is a plan view of a tube plate, which functions as a communication plate of a heat transfer tube, for use in a heat exchanger according to an embodiment of the present invention.
- FIG. 10 is a plan view of a tube plate, which functions as a partition plate of a heat transfer tube, for use in a heat exchanger according to an embodiment of the present invention.
- FIG. 11 is a plan view of a tube plate, which functions as an independent cup portion-type plate of a heat transfer tube, for use in a heat exchanger according to an embodiment of the present invention.
- FIGS. 12A-12C are partial, cross-sectional views of a heat transfer tube, showing steps for fixing a pair of tube plates to each other in a method for manufacturing a heat exchanger according to an embodiment of the present invention.
- FIGS. 13A-13C are partial, cross-sectional views of a heat transfer tube, showing further steps to expand the diameter of an opening at a tip portion of a raised portion after fixing a pair of tube plates to each other in a method for manufacturing a heat exchanger according to an embodiment of the present invention.
- FIG. 14 is a partial, cross-sectional view of the heat transfer tube as depicted in FIG. 12A .
- FIG. 15 is a partial, cross-sectional view of the heat transfer tube as depicted in FIG. 13C .
- a stacking-type, multi-flow, heat exchanger as depicted in FIGS. 1 and 2 , wherein heat transfer tubes and outer fins are stacked alternatively.
- a stacking-type, multi-flow, heat exchanger 1 comprises a core portion 4 in which heat transfer tubes 2 and outer fins 3 are stacked alternatively.
- End plates 5 and 6 are provided at outermost positions of core portion 4 in the stacking direction.
- Tanks 7 and 8 are formed on both tube end portions of core portion 4 by cup portions which are formed by tube plates described later.
- Inlet pipe 9 for introducing a heat exchanging fluid (e.g., a refrigerant) into heat exchanger 1 is connected to tank portion 7 a of tank 7 .
- Outlet pipe 10 for discharging fluid from heat exchanger 1 is connected to tank portion 7 b of tank 7 .
- the fluid flows in a predetermined fluid passage formed in heat exchanger 1 , and the heat is exchanged between the flowing fluid and outside air passing through heat exchanger 1 .
- a stacking-type, multi-flow, heat exchanger, according to the present invention, is suitable as an evaporator for use in an air conditioning system for vehicles.
- tube plates are depicted for a heat transfer tube used in a stacking-type, multi-flow, heat exchanger, according to an embodiment of the present invention.
- a brazing material may be clad beforehand on front and back surfaces of tube plates depicted in FIGS. 9-11 , and a flux for brazing may be applied uniformly on the front and back surfaces of the tube plates. Therefore, by assembling respective members of stacking-type, multi-flow, heat exchanger 1 and brazing them together in a furnace, a pair of tube plates and other members may be brazed to each other substantially at the same time.
- cup portions 31 , 32 , 33 , and 34 protrude outward from plate 30 and are formed on the end portions in the longitudinal direction of the tube plate.
- Communication holes 35 , 36 , 37 , and 38 are provided through portions 31 , 32 , 33 , and 34 .
- a communication path 55 is formed between cup portions 31 and 33 , and cup portions 31 and 33 communicate with each other through communication path 55 .
- Protruded portions 39 and 40 extend in the longitudinal direction of tube plate 30 and are formed on the tube plate 30 to form fluid passages in heat transfer tube 2 .
- Heat transfer tube 2 may be formed by fixing a pair of such tube plates 30 to each other and fixing (e.g., brazing) them to each other.
- a pair of such tube plates 30 may be fixed to each other as follows. Holes 41 are formed through both end portions of respective tube plates 30 , and a pair of tube plates 30 are positioned and temporarily assembled, so that corresponding holes 41 are aligned, as depicted in FIG. 12A . In an embodiment, such holes 41 may be formed simultaneously at the time of pressing each tube plate 30 . Further, when a pair of tube plates 30 are temporarily assembled, an inner fin, formed, for example, as a waved fin (not shown), may be inserted into a space (e.g., a fluid passage) formed between and within protruded portions 39 and 40 . The end portions of a pair of temporarily assembled, tube plates 30 are depicted in FIG. 14 .
- the diameters of the tip portions of raised portions 45 and 46 may be enlarged or expanded in order to secure a pair of tube plates 30 more strongly.
- a punch 47 for enlarging the diameter of or extending the tip portion of a raised portion is inserted into raised portions 45 and 46 , and the diameters of the tip portions of raised portions 45 and 46 are enlarged by punch 47 .
- tube plates 30 may be secured to each other more strongly.
- the condition of the end portions of the pair of tube plates 30 , with the diameter-enlarged or extended, tip portions of raised portions 45 and 46 is depicted in FIG. 15 .
- tube plate 50 e.g., a partition plate
- tube plate 52 e.g., a cup portion, independent-type plate
- a pair of respective tube plates also may be fixed to each other in a similar manner to that described above.
- the characteristics of stacking-type, multi-flow, heat exchangers, and the methods for manufacturing such heat exchangers, according to the present invention may be applied to any type of stacking-type, multi-flow, heat exchangers, wherein heat transfer tubes comprising a pair of tube plates and outer fins are stacked alternatively.
- the present invention may be applied to stacking-type, multi-flow, heat exchangers used as evaporators in air conditioning systems for vehicles.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A stacking-type, multi-flow, heat exchanger includes heat transfer tubes and outer fins stacked alternatively. Each heat transfer tube is formed by connecting a pair of tube plates, and each heat transfer tube includes a raised portion fixing the pair of tube plates to each other. The raised portions are formed by elongating or raising a portion of the pair of tube plates substantially simultaneously at a position at which a pair of holes, each of which is formed through one tube plate beforehand, are aligned. Complicated steps, such as inserting a raised portion into a hole, are not necessary. The number of types of tube plates also may be reduced. Moreover, the efficiency of assembling a heat transfer tube when fixing a pair of tube plates to each other may be significantly increased.
Description
- 1. Field of the Invention
- The present invention relates to stacking-type, multi-flow, heat exchangers. Each heat exchanger comprises a plurality of heat transfer tubes and outer fins, which are stacked alternatively. Each such tube is formed by a pair of tube plates. The present invention also relates to methods for manufacturing such heat exchangers.
- 2. Description of Related Art
- Recently, in the field of air conditioning systems for vehicles, a requirement for making air conditioners smaller has become more restrictive due to the narrower space available for installing air conditioner in smaller vehicles. In particular, in the field of evaporators, a requirement for decreasing a dimension in a depth direction (i.e., an air flow direction) has become more restrictive. In order to satisfy such requirements, an evaporator, in which each heat transfer tube is formed by a pair of tube plates and in which an inner fin is provided in a fluid passage formed in the heat transfer tube, is known.
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Tube plate 11 is formed, for example, as depicted inFIG. 3 .Cup portions tube plate 11.Communication holes cup portions portions tube plate 11 and are configured to form fluid passages in heat transfer tube 2. Heat transfer tube 2 is formed by connecting (e, brazing) a pair ofsuch tube plates 11 to each other after temporarily fixing them to each other. - More particularly, each heat transfer tube 2 is formed, for example, as follows. After a flux is applied to the inside of a pair of
tube plates 11, an inner fin (not shown) is inserted into a fluid passage is formed by protrudedportions FIGS. 8A and 8B , after a raisedportion 27 formed on afirst tube plate 11, raisedpotion 27 is inserted into ahole 28 formed through asecond tube plate 11′, bothtube plates portion 27 by apunch 29. - When such a fixing method is employed, in order to form a predetermined fluid passage in
heat exchanger 1, tube plates, such as those depicted inFIGS. 4-7 , are required. In these particular figures, a total of four kinds of tube plates are depicted. Atube plate 22 is depicted inFIG. 4 , in whichcup portions hole 28 is provided at a first side of the communication portion (i e., a communication plate). Atube plate 23 is depicted inFIG. 5 , in whichcup portions portion 27 is formed at the first side of the communication portion (i.e., a communication plate). Atube plate 24 is depicted inFIG. 6 , in which communication passages are not provided between the cup portions (i.e., a partition plate). Atube plate 25 is depicted inFIG. 7 , in which respective cup portions are independent from each other. By appropriately combining thesetube plates - In this case, in order to fix the same kind of
tube plates 25 to each other, a complicated process is required whereintube plates 25 formed by pressing are rotated alternatively by an angle of 180 degrees.Tube plates 25 then are combined as a pair of tube plates, raisedportion 27 of onetube plate 25 is inserted intohole 28 of theother tube plate 25, and the diameter of the tip portion of the inserted raisedportion 27 is expanded. Further, with respect to the communication plates, two kinds of tube plates,tube plates portion 27 andhole 28, are required. - To solve such problems, a method for combining a pair of tube plates, forming raised portions on both tube plates simultaneously in a single step, and fixing the pair of tube plates to each other by the formed raised portions is disclosed in Japanese Utility Model Laid-Open No. 55-126580. Nevertheless, because the diameters of a raised portion and a hole or passage formed through the central portion of the raised portion are substantially different from each other, it is difficult to accurately form both the raised portions and the central holes or passages simultaneously or in a single step.
- Accordingly, a need has arisen to provide stacking-type, multi-flow, heat exchangers, which may reduce the number of kinds of tube plates used for forming heat transfer tubes, and which may improve significantly the efficiency of assembling the heat transfer tubes, in particular, when fixing a pair of tube plates to each other. A need also has arisen for methods for manufacturing such heat exchangers.
- To satisfy the foregoing needs and to achieve other objects, a stacking-type, multi-flow, heat exchanger, according to the present invention, is provided. The stacking-type, multi-flow, heat exchanger comprises a plurality of heat transfer tubes and a plurality of outer fins, which are stacked alternatively. Each heat transfer tube comprises a pair of tube plates connected together to form a fluid passage in each heat transfer tube. Each heat transfer tube comprises raised portions fixing the pair of tube plates to each other. The raised portions are further formed by elongating or raising a portion of the pair of tube plates substantially simultaneously at a position at which a pair of holes, each of which is formed through one of the pair of tube plates, are aligned.
- In the heat exchanger, it is preferred that an enlarged diameter is provided at a tip portion of each of the barred portions. In such a structure, the tube plates may be fixed to each other more securely.
- Further, in the heat exchanger, an inner fin may be disposed in the fluid passage in each heat transfer tube, and the inner fin may extend in a longitudinal direction of each heat transfer tube. The inner fin may be a waved fin.
- According to the present invention, a method for manufacturing a stacking-type, multi-flow, heat exchanger comprising a plurality of heat transfer tubes and a plurality of outer fins, which are stacked alternatively, also is provided. Each heat transfer tube is formed by connecting a pair of tube plates to form a fluid passage in each heat transfer tube. The method comprises the steps of forming a hole through each of the pair of tube plates, positioning the pair of tube plates, so that the holes of the pair of tube plates are aligned, and elongating or raising a portion of the pair of tube plates substantially simultaneously at a position at which the holes are aligned for fixing the pair of tube plates to each other.
- In the method, it is preferred that diameters of tip portions of raised portions, formed by the step of elongating, are enlarged.
- In the stacking-type, multi-flow, heat exchangers and the methods for manufacturing the same, according to the present invention, after tube plates, through each of which a hole has been formed, are assembled, so that the holes of both tube plates are aligned, a raised portion is formed by elongating or raising a portion of the plates at a position at which the holes are aligned, for example, by fit-inserting a punch into the holes. The raised portions are formed on both tube plates substantially simultaneously, as a part of each tube plate at the position at which the holes are aligned. Therefore, complicated steps, such as inserting a raised portion into a hole, are not necessary. Further, because it is not necessary to prepare two kinds of tube plates which are different from each other in the positions of a raised portion and a hole (Le., the aforementioned communication plates), the number of types of tube plates may be reduced. Moreover, the efficiency of assembling a heat transfer tube when fixing a pair of tube plates to each other may be significantly 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.
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FIG. 1 is a plan view of a stacking-type, multi-flow, heat exchanger, according to an embodiment of the present invention. -
FIG. 2 is an overhead or top view of the heat exchanger depicted inFIG. 1 , as viewed along Line II-II ofFIG. 1 . -
FIG. 3 is a perspective view of a tube plate for use in a known heat exchanger. -
FIG. 4 is a plan view of a tube plate for use in a known heat exchanger. -
FIG. 5 is a plan view of another tube plate for use in a known heat exchanger. -
FIG. 6 is a plan view of still another tube plate for use in a known heat exchanger. -
FIG. 7 is a plan view of yet another tube plate for use in a known heat exchanger. -
FIGS. 8A and 8B are partial, cross-sectional views of a heat transfer tube, showing steps for fixing a pair of tube plates to each other in a method for manufacturing a known heat exchanger. -
FIG. 9 is a plan view of a tube plate, which functions as a communication plate of a heat transfer tube, for use in a heat exchanger according to an embodiment of the present invention. -
FIG. 10 is a plan view of a tube plate, which functions as a partition plate of a heat transfer tube, for use in a heat exchanger according to an embodiment of the present invention. -
FIG. 11 is a plan view of a tube plate, which functions as an independent cup portion-type plate of a heat transfer tube, for use in a heat exchanger according to an embodiment of the present invention. -
FIGS. 12A-12C are partial, cross-sectional views of a heat transfer tube, showing steps for fixing a pair of tube plates to each other in a method for manufacturing a heat exchanger according to an embodiment of the present invention. -
FIGS. 13A-13C are partial, cross-sectional views of a heat transfer tube, showing further steps to expand the diameter of an opening at a tip portion of a raised portion after fixing a pair of tube plates to each other in a method for manufacturing a heat exchanger according to an embodiment of the present invention. -
FIG. 14 is a partial, cross-sectional view of the heat transfer tube as depicted inFIG. 12A . -
FIG. 15 is a partial, cross-sectional view of the heat transfer tube as depicted inFIG. 13C . - In such evaporators, a stacking-type, multi-flow, heat exchanger, as depicted in
FIGS. 1 and 2 , is known, wherein heat transfer tubes and outer fins are stacked alternatively. In these figures, a stacking-type, multi-flow,heat exchanger 1 comprises a core portion 4 in which heat transfer tubes 2 andouter fins 3 are stacked alternatively.End plates Tanks -
Inlet pipe 9 for introducing a heat exchanging fluid (e.g., a refrigerant) intoheat exchanger 1 is connected totank portion 7 a oftank 7.Outlet pipe 10 for discharging fluid fromheat exchanger 1 is connected totank portion 7 b oftank 7. The fluid flows in a predetermined fluid passage formed inheat exchanger 1, and the heat is exchanged between the flowing fluid and outside air passing throughheat exchanger 1. A stacking-type, multi-flow, heat exchanger, according to the present invention, is suitable as an evaporator for use in an air conditioning system for vehicles. - Referring to
FIGS. 9-11 , tube plates are depicted for a heat transfer tube used in a stacking-type, multi-flow, heat exchanger, according to an embodiment of the present invention. A brazing material may be clad beforehand on front and back surfaces of tube plates depicted inFIGS. 9-11 , and a flux for brazing may be applied uniformly on the front and back surfaces of the tube plates. Therefore, by assembling respective members of stacking-type, multi-flow,heat exchanger 1 and brazing them together in a furnace, a pair of tube plates and other members may be brazed to each other substantially at the same time. - In a tube plate 30 (e.g., a communication plate) depicted in
FIG. 9 ,cup portions plate 30 and are formed on the end portions in the longitudinal direction of the tube plate. Communication holes 35, 36, 37, and 38 are provided throughportions communication path 55 is formed betweencup portions cup portions communication path 55.Protruded portions tube plate 30 and are formed on thetube plate 30 to form fluid passages in heat transfer tube 2. Heat transfer tube 2 may be formed by fixing a pair ofsuch tube plates 30 to each other and fixing (e.g., brazing) them to each other. - A pair of
such tube plates 30 may be fixed to each other as follows.Holes 41 are formed through both end portions ofrespective tube plates 30, and a pair oftube plates 30 are positioned and temporarily assembled, so that correspondingholes 41 are aligned, as depicted inFIG. 12A . In an embodiment,such holes 41 may be formed simultaneously at the time of pressing eachtube plate 30. Further, when a pair oftube plates 30 are temporarily assembled, an inner fin, formed, for example, as a waved fin (not shown), may be inserted into a space (e.g., a fluid passage) formed between and within protrudedportions tube plates 30 are depicted inFIG. 14 . - Next, while confirming that corresponding
holes 41 are aligned, the assembly is fixed by adie 43, and apunch 44 is inserted into alignedholes 41, as depicted inFIG. 12B . By insertingpunch 44 at aposition 56 on the pair oftube plates 30 at which holes 41 are aligned, raisedportions respective tube plates 30 are formed substantially simultaneously as a part of eachtube plate 30, as depicted inFIG. 12C . - Further, the diameters of the tip portions of raised
portions tube plates 30 more strongly. For example, as depicted inFIGS. 13A and 13B , apunch 47 for enlarging the diameter of or extending the tip portion of a raised portion is inserted into raisedportions portions punch 47. By such diameter-enlarged or extended, tip portions of raisedportions tube plates 30 may be secured to each other more strongly. The condition of the end portions of the pair oftube plates 30, with the diameter-enlarged or extended, tip portions of raisedportions FIG. 15 . - For tube plate 50 (e.g., a partition plate) depicted in
FIG. 10 and tube plate 52 (e.g., a cup portion, independent-type plate) depicted inFIG. 11 , a pair of respective tube plates also may be fixed to each other in a similar manner to that described above. - In the above-described stacking-type, multi-flow, heat exchangers, and methods for manufacturing such heat exchangers, because holes are formed through each tube plate and subsequently the holes of a pair of tube plates are aligned, the elongating or raising step is carried out at the location of the aligned holes. As a result, the raised portions of both tube plates may be accurately and readily formed substantially simultaneously. Therefore, complicated steps, such as inserting a raised portion into a hole, are not necessary. Further, because it is not necessary to prepare two kinds of tube plates, which are different from each other in the positions of the raised portion and the hole, the number of types of tube plates is reduced. Moreover, the efficiency of assembling the tube plates, in particular, of fixing a pair of tube plates to each other, may be significantly increased.
- The characteristics of stacking-type, multi-flow, heat exchangers, and the methods for manufacturing such heat exchangers, according to the present invention, may be applied to any type of stacking-type, multi-flow, heat exchangers, wherein heat transfer tubes comprising a pair of tube plates and outer fins are stacked alternatively. In particular, the present invention may be applied to stacking-type, multi-flow, heat exchangers used as evaporators in air conditioning systems for vehicles.
- Although embodiments of the present invention have been described in detail herein, the scope of the invention is not limited thereto. It will be appreciated by those skilled in the art that various modifications may be made without departing from the scope of the invention. Accordingly, the embodiments disclosed herein are only exemplary. It is to be understood that the scope of the invention is not to be limited thereby, but is to be determined by the claims which follow.
Claims (6)
1. A stacking-type, multi-flow, heat exchanger comprising a plurality of heat transfer tubes and a plurality of outer fins, which are stacked alternatively, each of said heat transfer tubes comprising a pair of tube plates connected together to form a fluid passage in each of said heat transfer tubes, each of said heat transfer tubes further comprising:
raised portions fixing said pair of tube plates to each other, said raised portions being formed by elongating said pair of tube plates substantially simultaneously at a position at which a pair of holes, each of which is formed through one of said pair of tube plates, are aligned.
2. The stacking-type, multi-flow, heat exchanger of claim 1 , wherein each of said raised portions comprises a tip portion having an enlarged diameter.
3. The stacking-type, multi-flow, heat exchanger of claim 1 , wherein an inner fin is disposed in said fluid passage in each of said heat transfer tubes, said inner fin extending in a longitudinal direction of each of said heat transfer tubes.
4. The stacking-type, multi-flow, heat exchanger of claim 3 , wherein said inner fin is a waved fin.
5. A method for manufacturing a stacking-type, multi-flow, heat exchanger comprising a plurality of heat transfer tubes and a plurality of outer fins, which are stacked alternatively, each of said heat transfer tubes being formed by connecting a pair of tube plates to form a fluid passage in each of said heat transfer tubes, said method comprising the steps of:
forming a hole through each of said pair of tube plates;
positioning said pair of tube plates, so that said holes of said pair of tube plates are aligned; and
elongating said pair of tube plates substantially simultaneously at a position at which said holes are aligned for fixing said pair of tube plates to each other.
6. The method of claim 5 , further comprising the steps of enlarging diameters of tip portions of raised portions, formed by said step of elongating.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004/183613 | 2004-06-22 | ||
JP2004183613A JP2006010102A (en) | 2004-06-22 | 2004-06-22 | Stacked heat exchanger and its manufacturing method |
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US20050279485A1 true US20050279485A1 (en) | 2005-12-22 |
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Application Number | Title | Priority Date | Filing Date |
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US11/150,139 Abandoned US20050279485A1 (en) | 2004-06-22 | 2005-06-13 | Stacking-type, multi-flow, heat exchangers and methods for manufacturing such heat exchangers |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050279485A1 (en) |
EP (1) | EP1610080A3 (en) |
JP (1) | JP2006010102A (en) |
CN (1) | CN1712875A (en) |
CA (1) | CA2510431A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100077794A1 (en) * | 2008-09-29 | 2010-04-01 | Showa Denko K.K. | Evaporator |
US20130186606A1 (en) * | 2007-08-15 | 2013-07-25 | Rolls-Royce Plc | Heat exchanger |
US20150176921A1 (en) * | 2012-09-19 | 2015-06-25 | Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd. | Heat exchanger |
US20160091253A1 (en) * | 2014-09-30 | 2016-03-31 | Valeo Climate Control Corp. | Heater core |
DE102020201131A1 (en) | 2020-01-30 | 2021-08-05 | Mahle International Gmbh | Heat exchanger plate for a heat exchanger, in particular for a stacked plate heat exchanger or for a plate heat exchanger |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101180942B1 (en) * | 2009-12-04 | 2012-09-07 | 현대자동차주식회사 | Suspension arm |
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- 2005-06-13 US US11/150,139 patent/US20050279485A1/en not_active Abandoned
- 2005-06-14 EP EP05253669A patent/EP1610080A3/en not_active Withdrawn
- 2005-06-21 CA CA002510431A patent/CA2510431A1/en not_active Abandoned
- 2005-06-22 CN CN200510079075.4A patent/CN1712875A/en active Pending
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US2164628A (en) * | 1937-12-29 | 1939-07-04 | Floyd J Sibley | Radiator header with floating tube sheet |
US4846268A (en) * | 1988-01-12 | 1989-07-11 | Thermag Industries Inc. | Heat exchanger with individual twinplate headers |
US5088193A (en) * | 1988-09-02 | 1992-02-18 | Sanden Corporation | Method for manufacturing a heat exchanger |
US5538077A (en) * | 1989-02-24 | 1996-07-23 | Long Manufacturing Ltd. | In tank oil cooler |
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US6543530B2 (en) * | 2000-04-06 | 2003-04-08 | Sanden Corporation | Heat exchanger having an improved pipe connecting structure |
US20050263271A1 (en) * | 2004-05-26 | 2005-12-01 | Kengo Kazari | Stacking-type, multi-flow, heat exchangers and methods for manufacturing such heat exchangers |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130186606A1 (en) * | 2007-08-15 | 2013-07-25 | Rolls-Royce Plc | Heat exchanger |
US20100077794A1 (en) * | 2008-09-29 | 2010-04-01 | Showa Denko K.K. | Evaporator |
US8276401B2 (en) * | 2008-09-29 | 2012-10-02 | Showa Denko K.K. | Evaporator |
US20150176921A1 (en) * | 2012-09-19 | 2015-06-25 | Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd. | Heat exchanger |
US20160091253A1 (en) * | 2014-09-30 | 2016-03-31 | Valeo Climate Control Corp. | Heater core |
US10113817B2 (en) * | 2014-09-30 | 2018-10-30 | Valeo Climate Control Corp. | Heater core |
DE102020201131A1 (en) | 2020-01-30 | 2021-08-05 | Mahle International Gmbh | Heat exchanger plate for a heat exchanger, in particular for a stacked plate heat exchanger or for a plate heat exchanger |
Also Published As
Publication number | Publication date |
---|---|
CA2510431A1 (en) | 2005-12-22 |
EP1610080A2 (en) | 2005-12-28 |
JP2006010102A (en) | 2006-01-12 |
EP1610080A3 (en) | 2006-12-13 |
CN1712875A (en) | 2005-12-28 |
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Legal Events
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Owner name: SANDEN CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHIBA, TOMOHIRO;OHNO, TAKAYUKI;KAZARI, KENGO;REEL/FRAME:016535/0097 Effective date: 20050830 |
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