US20030131979A1 - Oil cooler - Google Patents
Oil cooler Download PDFInfo
- Publication number
- US20030131979A1 US20030131979A1 US10/316,833 US31683302A US2003131979A1 US 20030131979 A1 US20030131979 A1 US 20030131979A1 US 31683302 A US31683302 A US 31683302A US 2003131979 A1 US2003131979 A1 US 2003131979A1
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- US
- United States
- Prior art keywords
- oil
- plates
- oil cooler
- embossing
- joined
- 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.)
- Abandoned
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Classifications
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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
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
- F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
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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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
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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
- F28F9/0234—Header boxes; End plates having a second heat exchanger disposed there within, e.g. oil cooler
-
- 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
- F28F9/0246—Arrangements for connecting header boxes with flow lines
-
- 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
- F28F9/0246—Arrangements for connecting header boxes with flow lines
- F28F9/0256—Arrangements for coupling connectors with flow lines
-
- 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
- F28D2021/0049—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for lubricants, e.g. oil coolers
Definitions
- the present invention relates to an oil cooler, and more particularly, to an oil cooler in which embossing strips are provided to improve the heat exchange efficiency in the oil passages and the cooling water passages.
- the oil temperature has to be maintained at a proper level, and for this purpose, an oil cooler is installed within the radiator which cools down the engine cooling water, so that the oil can be cooled with the cooling water flowing through the radiator.
- An intra-radiator oil cooler disclosed in U.S. Pat. No. 5,369,883, as shown in FIG. 1, is constituted as follows.
- An oil inlet 3 and an oil outlet 5 are disposed at the sides of the oil cooler 1 respectively.
- An oil passage 11 is formed such that two plates 7 and 9 are overlappedly brazed mutually.
- Cooling water passage 13 is braze-formed and separated from the oil passage part 11 .
- the cooling water passage 13 is formed by the brazed embossing part 9 a of the plates 7 and 9 .
- An oil cooler disclosed in Korean Utility Model Laid-open No.2000-0019797 and Korean Patent Application Laid-open No.2001-0046175, as shown in FIG. 2, comprises an oil inlet 19 for introducing the oil; an oil outlet 21 for discharging the oil; an oil passage 23 for the flow of the oil; and a cooling water passage 25 for the flow of the cooling water.
- the oil passage 23 is constituted such that two press-formed plates 27 and 29 are overlappedly brazed together.
- An internal fin 31 made of an aluminum thin sheet is inserted into the oil passage 23 to disturb the oil flow, thereby improving the heat exchange with the cooling water.
- cooling water passage part 25 there is also inserted an outer fin 33 made of a corrugated aluminum thin sheet.
- This oil cooler 17 is manufactured in such a manner that a close contact assembling is carried out first, and then a furnace brazing is carried out.
- the present invention provides an oil cooler in which a separate outer fin is not inserted into the cooling water passages, and a separate internal fin for disturbing the oil flow is not inserted, but a sufficient heat exchange is realized between the oil and the cooling water, as well as improving the oil pressure withstanding characteristics.
- first and second plates are joined together to form tubes of oil passages, and the tubes being stacked in a plurality to form cooling water passages between them.
- the first and second plates are embossed in a lateral direction in skew to form a plurality of embossing strips, and the embossing strips are continuously formed along the length of each of the first and second plates.
- the embossing strips are crossed and joined, and the adjacent embossing strips are also mutually crossed and joined.
- Oil inlet/outlet holes are formed in both ends of the first and second plates, manifold parts of a certain area are formed around the inlet/outlet holes, and the embossing strips are preserved around the manifold parts.
- each of the embossing strips is flat so that the joining can be rendered easy, and the joining can be made firm.
- the horizontal distance L 1 of the connection face between the flat horizontal faces is same as or larger than the length L 2 of the horizontal face.
- connection face is inclined, and therefore, the cross sectional view of the embossing strip is trapezoidal.
- the embossing strip is straight or bent at the centerlines of the first and second plates to form a “>” shape (i.e., a “V-shape”).
- the first and second plates are joined together to form tubes, and a flange is formed along each of the edges of the plates.
- the flange is provided with a marking part so that the assembling direction can be recognized during the assembling.
- the marking part preferably consists of a slot or a protuberance, or a carving may be carried out.
- embossing protuberances From the oil inlet/outlet holes of the both ends of the first and second plates to the lengthwise outer portion, there are formed other embossing protuberances. Therefore, the embossing protuberances can be joined to each other regardless of the assembling direction of the first and second plates.
- An upper end plate is coupled to the uppermost tubes among the plurality of the tubes, so that the oil pressure can be withstood.
- a pair of tubular connection devices which communicate to the oil inlet/outlet holes are fitted to the upper end plate.
- An end of the tubular connection device is made to undergo an expansion process before being brazed to the first plate which is a part of the tubes and the upper end plate.
- a lower end plate is coupled to the bottom of the lowermost tube set so that the oil pressure can be withstood, while the plate of the lowermost tube set, to which the lower end plate is joined, is not provided with an oil inlet/outlet holes.
- a bent protuberance is formed on the end of the upper end plate or the lower end plate, so that the assembling can be rendered easier.
- the oil cooler is made of an aluminum-clad material, and the joining parts are joined by brazing them. Or the oil cooler is made of stainless steel and the joining parts can be joined by brazing by using a filler metal plate consisting of a copper sheet or nickel sheet
- FIG. 1 illustrates an example of the conventional oil cooler
- FIG. 2 illustrates another example of the conventional oil cooler
- FIG. 3 is a perspective view of the oil cooler according to the present invention.
- FIG. 4 is a sectional view of the joined state of the respective plates of the oil cooler according to the present invention.
- FIG. 5 is an exploded perspective view of the oil cooler according to the present invention.
- FIG. 6 is a plan view of the plate used in the oil cooler according to the present invention.
- FIG. 7 is a sectional view taken along a line A-A′ of FIG. 6;
- FIG. 8 is a plan view of brazing regions and oil passage regions, a pair of plates being assembled in the oil cooler according to the present invention
- FIG. 9 is a sectional view, with a tubular connection device being coupled to an oil inlet/outlet of an upper end plate in the oil cooler according to the present invention
- FIG. 10 is a plan view of another embodiment of the plate used in the oil cooler according to the present invention.
- FIG. 11 is a sectional view taken along a line B-B′ of FIG. 10.
- the oil cooler 35 As shown in FIGS. 3 to 5 , the oil cooler 35 according to the present invention comprises first and second plates 49 and 51 joined together to form tubes 42 of oil passages 41 (refer to FIG. 4).
- the tubes 42 are stacked in a plurality to form cooling water passages 43 between them.
- An upper end plate 45 is coupled to the top of the uppermost tube set so as to sufficiently withstand against the oil pressure.
- Tubular connection devices 37 and 39 are fitted to the upper end plate 45 to communicate an oil inlet hole and oil outlet hole.
- a lower end plate 47 is coupled to the bottom of the lowermost tube set so as to sufficiently withstand against the oil pressure.
- the first and second plates 49 and 51 consist of a sheet strip respectively, with both ends of each of them being rounded.
- the first and second plates 49 and 51 are embossed in a lateral direction in skew to form a plurality of embossing strips 53 .
- the embossing strips 53 are repeatedly formed along the length of each of the first and second plates 49 and 51 .
- the embossing strips 53 of the first and second plates 49 and 51 are crossed and brazed to form brazing regions 53 c so as to form tubes 42 , i.e., oil passages 41 .
- oil inlet hole 55 and oil outlet hole 59 are formed in both ends of the first and second plates 49 and 51 . Some parts around the oil inlet hole 55 and oil outlet hole 59 are removed to form manifold parts 57 and 61 , while the embossing strips are preserved intact around the manifold parts 57 and 61 .
- the first and second plates 49 and 51 are joined together to form tubes, and a flange 63 is formed along the edge of each of the first and second plates 49 and 51 .
- the flange 63 is provided with a marking part 63 a so that the assembling direction can be recognized during the assembling.
- the marking part 63 a preferably consists of a slot or a bent protuberance, or a carving may be carried out.
- the marking part 63 a is formed on one of the rounded parts of the plate.
- the brazing face (bottom face) of the flange 63 lies on the same level as that of an embossing inner face 53 b of the plate viewed when it is formed into tubes.
- the brazing face of the manifold part ( 57 or 61 ) lies on the same level as that of an embossing outer face 53 a of the plate viewed when it is formed into tubes.
- a plate 51 ′ of the lowermost tube which is closely joined to the lower end plate 47 , is not provided with an oil inlet and outlet holes.
- an outer face 53 a and an inner face 53 b of each of the embossing strips 53 are of a flat horizontal face, so that the joining can be rendered easier, and the joining strength can be strengthened.
- the horizontal distance L 1 of the connection face 53 e between the upper and lower faces (flat faces) is same as or larger than the length L 2 of the horizontal face.
- connection face 53 e is inclined, and therefore, the cross sectional view of the embossing strip is trapezoidal.
- the connection face 53 e can be a curved face.
- the embossing strip 53 is straight.
- Both ends of the upper end plate 45 are respectively provided with holes 45 a and 45 b which respectively communicate to the oil inlet hole 55 and oil outlet hole 59 .
- the tubular connection devices 37 and 39 are fitted into holes 45 a and 45 b of the upper end plate 45 and into the holes 55 and 59 of the first plate 49 respectively.
- tubular connection parts 37 and 39 are provided with threads on their inner and outer circumferences respectively.
- the parts 37 a and 39 a of the tubular connection parts 37 and 39 which are inserted into the holes 45 a and 45 b of the upper end plate 45 and into the holes 55 and 59 of the first plate 49 respectively, are made to undergo an expansion process, before being brazed to the upper end plate 45 .
- Bent protuberances 45 c and 47 c are formed on the ends of the upper end plate 45 or on ends of the lower end plate 47 , so that the assembling can be rendered easier.
- the embossing strips 53 are crossedly contacted to each other, and thus, the spaces other than the brazing regions 53 c form oil passages. Further, the flange 63 is formed all around, and therefore, any leakage of the oil can be prevented.
- the solid lines indicate the embossing strips of the first plate 49
- the dotted lines which cross the solid lines indicate the embossing strips of the second plate.
- the embossing strips 53 are formed also around the manifold parts 57 and 61 of the first and second plates 49 and 51 , and therefore, when the first and second plates 49 and 51 are overlappedly assembled to form the tubes 42 , the areas of the manifold parts 57 and 61 subjected to the oil pressure are reduced, thereby improving the oil pressure withstanding strength.
- the marking part 63 a is formed on only one face of each of the first and second plates 49 and 51 . Therefore, when forming the tubes 42 by overlappedly coupling the upper and lower plates 49 and 51 , and when forming the cooling water passages 43 by stacking a plurality of the tubes 42 , the first and second plates 49 and 51 can be prevented from being assembled in an erroneous direction.
- the second plate 51 of the lowermost tube set is not provided with an oil inlet and an oil outlet, and therefore, the oil pressure withstanding strength is improved, while preserving the function of the oil passages, because the mentioned second plate 51 is braze-joined to the lower end plate 47 .
- the upper and lower end plates 45 and 47 are for improving the oil pressure withstanding strength.
- the tubular connection parts 37 and 39 are firmly assembled to the upper end plate 45 through the tube expansion process as shown in FIG. 9, and therefore, the upper end plate 45 can also serve as a medium for braze-joining the tubular connection parts 37 and 39 to the first plate 49 of the uppermost tube set.
- a pair of protuberance parts 45 c and 47 c are provided on each of semicircular ends of the upper and lower end plates 45 and 47 in such a manner for the protuberance parts 45 c and 47 c to surround the uppermost plate and the lowermost plate.
- the assembling is carried out in such a manner that the protuberance part 45 c should surround the uppermost first plate 49 , and therefore, the holes 45 a and 45 b of the upper end plate 45 can be easily aligned to the oil i/o holes 55 and 59 of the first plate 49 .
- FIG. 8 is a plan view of the brazing regions 53 c and oil passage regions, when the first and second plates 49 and 51 are overlappedly assembled in the oil cooler according to the present invention.
- the brazing regions 53 c are provided all along the flange 63 continuously. Therefore, the brazing regions 53 c of the first and second plates 49 and 51 can be assured to the maximum, and thus the withstanding strength against the oil pressure can be improved.
- the brazing regions 53 c in the oil passages 41 are formed all along the flange 63 , the first and second plates 49 and 51 are overlappedly assembled to form the tubes 42 for forming the oil passages 41 .
- a plurality of these tubes 42 are stacked in the same direction to form the cooling water passages 43 .
- the contact points of the embossing strips 53 i.e., the brazing regions 53 d of the side of the cooling water passages 43 (refer to FIG. 4) are positioned where the cooling water starts to contact.
- connection face which connects the horizontal faces 53 a and 53 b has a horizontal distance L 1 same as or larger than the length L 2 . Accordingly, the brazing areas are reduced, while the heat exchange areas are increased, resulting in that the passage resistance is reduced, thereby improving the heat exchange efficiency.
- FIG. 10 is a plan view of another embodiment of the first and second plates used in the oil cooler 35 according to the present invention.
- embossing strips 73 are bent along the centerlines of first and second plates 71 and 72 to form a “ ⁇ ” shape (i.e., a “V-shape”).
- the first and second plates 71 and 72 are provided with a flange 81 along their edges so that the plates can be coupled together to form tubes.
- protruded outer face 73 a and inner face 73 b of each of the embossing strips 73 are flat so that the joining can be easy and strong.
- connection face 73 e which connects the upper face (flat face) and the bottom face (flat face) is same as or larger than the length L 2 of the flat face.
- connection faces 73 e are inclined, and therefore, the cross section is trapezoidal.
- the connection face 73 e can be made curved.
- the first and second plates are coupled together with the first plate 71 is rotated by 180 degrees and with the second plate 72 not rotated, thereby forming the oil passages and the cooling water passages.
- the embossing strips are removed around the oil inlet hole 83 and oil outlet hole 85 respectively to form manifold parts 75 and 77 .
- the embossing strips are preserved around the manifold parts 75 and 77 , and therefore, the oil pressure withstanding strength is improved at both ends of the plates. It is a matter of fact that “ ⁇ ” shaped embossing protuberances can be formed instead of the embossing protuberances 79 .
- the tubes i.e., the oil passages by coupling the first and second plates 71 and 72
- the cooling water passages by stacking a plurality of the tubes the following features are provided.
- a slot 81 a is formed on one end of each of the first and second plates 71 and 72 , while a protuberance 81 b is provided on the other end of each of the first and second plates. Further, a slot or a protuberance 81 c is formed at the middle between the slot 81 a and the protuberance 81 b.
- a plurality of the oil passages are stacked by utilizing the slot or protuberance which is formed on only one side of the flange between the both ends of the plates. Under this condition, it can be confirmed that a pair of the oil passages are assembled in the same direction.
- the oil flows in through the tubular connection device 37 to enter into the respective manifold parts 57 .
- the oil is distributed from the manifold parts 57 to the respective oil passages 41 so as to move in the lengthwise direction of the tubes 42 . Then the oil is collected into the manifold part 61 to be returned through the tubular connection device 39 .
- the above described oil cooler 35 should be preferably manufactured by the continuous furnace process, and for this purpose, the components should be preferably made of aluminum. Particularly, the portions on which the brazing joining is carried out should be preferably made of an aluminum alloy on which a filler metal for brazing is clad.
- the components can be made of stainless steel or nickel steel, and then a thin copper sheet is adopted as the filler metal.
- the plates can be formed in oval, rectangular, polygonal and the like.
- the method of forming the oil passages and the cooling water passages is same as the above described embodiments.
- the above embodiments are for the oil cooler for the vehicle transmission, but if the plates are made round, they can be applied to the engine oil cooler.
- the embossing strips are formed over the entire surface of the upper and lower plates, and therefore, the areas of the heat exchange are increased. Further, the flows of the oil and the cooling water are not straight, but are broken down up and down and leftward and rightward.
- braze-joining regions are formed at regular intervals in the oil passages and the cooling water passages, and therefore, the oil pressure withstanding characteristics are improved.
Abstract
An oil cooler is disclosed. First and second plates are overlappedly joined together to form a plurality of tubes so as form a plurality of oil passages between the two plates. A plurality of the tubes are stacked to form cooling water passages. Embossing strips are repeatedly formed in skew along the length of first and second plates, and the embossing strips are crossed and joined. The embossing strips which are formed outside the tubes are also crossed and joined. Oil inlet/outlet holes are formed on both ends of the first and second plates respectively. Manifold parts of a certain area are formed around the oil inlet/outlet holes, and the embossing strips are preserved intact around the manifold parts. Accordingly, flow disturbances are sufficiently realized in the oil passages and in the cooling water passages owing to the embossing strips. Therefore, the heat exchanges are sufficiently improved between the oil and the cooling water, which flow through the radiator. Further, in the manifold parts, the area loaded with the oil pressure is reduced, thereby improving the oil pressure withstanding strength.
Description
- The present invention relates to an oil cooler, and more particularly, to an oil cooler in which embossing strips are provided to improve the heat exchange efficiency in the oil passages and the cooling water passages.
- The oil which is used in the automobiles and the like is heated during the operation due to the friction heat. As a result, the viscosity of the oil is lowered, and ultimately, the characteristics of the oil are lost, resulting in that the part subjected to the friction is worn out.
- Accordingly, the oil temperature has to be maintained at a proper level, and for this purpose, an oil cooler is installed within the radiator which cools down the engine cooling water, so that the oil can be cooled with the cooling water flowing through the radiator.
- An intra-radiator oil cooler disclosed in U.S. Pat. No. 5,369,883, as shown in FIG. 1, is constituted as follows.
- An
oil inlet 3 and anoil outlet 5 are disposed at the sides of the oil cooler 1 respectively. Anoil passage 11 is formed such that twoplates 7 and 9 are overlappedly brazed mutually.Cooling water passage 13 is braze-formed and separated from theoil passage part 11. Thecooling water passage 13 is formed by the brazed embossingpart 9 a of theplates 7 and 9. - Within the
oil passage part 11 which is formed by brazing theplates 7 and 9 mutually overlappedly, there is inserted aninternal fin 15 made of an aluminum thin sheet, so that the oil can be disturbed during its flow, thereby improving the heat exchange with the cooling water. - An oil cooler disclosed in Korean Utility Model Laid-open No.2000-0019797 and Korean Patent Application Laid-open No.2001-0046175, as shown in FIG. 2, comprises an
oil inlet 19 for introducing the oil; anoil outlet 21 for discharging the oil; anoil passage 23 for the flow of the oil; and acooling water passage 25 for the flow of the cooling water. - The
oil passage 23 is constituted such that two press-formedplates internal fin 31 made of an aluminum thin sheet is inserted into theoil passage 23 to disturb the oil flow, thereby improving the heat exchange with the cooling water. - In the cooling
water passage part 25, there is also inserted anouter fin 33 made of a corrugated aluminum thin sheet. Thisoil cooler 17 is manufactured in such a manner that a close contact assembling is carried out first, and then a furnace brazing is carried out. - The present invention provides an oil cooler in which a separate outer fin is not inserted into the cooling water passages, and a separate internal fin for disturbing the oil flow is not inserted, but a sufficient heat exchange is realized between the oil and the cooling water, as well as improving the oil pressure withstanding characteristics.
- In accordance with an embodiment of the present invention, first and second plates are joined together to form tubes of oil passages, and the tubes being stacked in a plurality to form cooling water passages between them. The first and second plates are embossed in a lateral direction in skew to form a plurality of embossing strips, and the embossing strips are continuously formed along the length of each of the first and second plates. The embossing strips are crossed and joined, and the adjacent embossing strips are also mutually crossed and joined. Oil inlet/outlet holes are formed in both ends of the first and second plates, manifold parts of a certain area are formed around the inlet/outlet holes, and the embossing strips are preserved around the manifold parts.
- The projected outside face of each of the embossing strips is flat so that the joining can be rendered easy, and the joining can be made firm.
- In a sectional view of the embossing strip, the horizontal distance L1 of the connection face between the flat horizontal faces is same as or larger than the length L2 of the horizontal face.
- The connection face is inclined, and therefore, the cross sectional view of the embossing strip is trapezoidal.
- The embossing strip is straight or bent at the centerlines of the first and second plates to form a “>” shape (i.e., a “V-shape”).
- The first and second plates are joined together to form tubes, and a flange is formed along each of the edges of the plates. The flange is provided with a marking part so that the assembling direction can be recognized during the assembling.
- The marking part preferably consists of a slot or a protuberance, or a carving may be carried out.
- From the oil inlet/outlet holes of the both ends of the first and second plates to the lengthwise outer portion, there are formed other embossing protuberances. Therefore, the embossing protuberances can be joined to each other regardless of the assembling direction of the first and second plates.
- An upper end plate is coupled to the uppermost tubes among the plurality of the tubes, so that the oil pressure can be withstood.
- A pair of tubular connection devices which communicate to the oil inlet/outlet holes are fitted to the upper end plate. An end of the tubular connection device is made to undergo an expansion process before being brazed to the first plate which is a part of the tubes and the upper end plate.
- A lower end plate is coupled to the bottom of the lowermost tube set so that the oil pressure can be withstood, while the plate of the lowermost tube set, to which the lower end plate is joined, is not provided with an oil inlet/outlet holes.
- A bent protuberance is formed on the end of the upper end plate or the lower end plate, so that the assembling can be rendered easier.
- The oil cooler is made of an aluminum-clad material, and the joining parts are joined by brazing them. Or the oil cooler is made of stainless steel and the joining parts can be joined by brazing by using a filler metal plate consisting of a copper sheet or nickel sheet
- The above object and other advantages of the present invention will become more apparent by describing in detail the preferred embodiments of the present invention with reference to the attached drawings in which:
- FIG. 1 illustrates an example of the conventional oil cooler;
- FIG. 2 illustrates another example of the conventional oil cooler;
- FIG. 3 is a perspective view of the oil cooler according to the present invention;
- FIG. 4 is a sectional view of the joined state of the respective plates of the oil cooler according to the present invention;
- FIG. 5 is an exploded perspective view of the oil cooler according to the present invention;
- FIG. 6 is a plan view of the plate used in the oil cooler according to the present invention;
- FIG. 7 is a sectional view taken along a line A-A′ of FIG. 6;
- FIG. 8 is a plan view of brazing regions and oil passage regions, a pair of plates being assembled in the oil cooler according to the present invention;
- FIG. 9 is a sectional view, with a tubular connection device being coupled to an oil inlet/outlet of an upper end plate in the oil cooler according to the present invention;
- FIG. 10 is a plan view of another embodiment of the plate used in the oil cooler according to the present invention; and
- FIG. 11 is a sectional view taken along a line B-B′ of FIG. 10.
- As shown in FIGS.3 to 5, the
oil cooler 35 according to the present invention comprises first andsecond plates tubes 42 of oil passages 41 (refer to FIG. 4). Thetubes 42 are stacked in a plurality to formcooling water passages 43 between them. - An
upper end plate 45 is coupled to the top of the uppermost tube set so as to sufficiently withstand against the oil pressure.Tubular connection devices upper end plate 45 to communicate an oil inlet hole and oil outlet hole. Alower end plate 47 is coupled to the bottom of the lowermost tube set so as to sufficiently withstand against the oil pressure. - The first and
second plates second plates embossing strips 53. Theembossing strips 53 are repeatedly formed along the length of each of the first andsecond plates - The
embossing strips 53 of the first andsecond plates brazing regions 53 c so as to formtubes 42, i.e.,oil passages 41. - The adjacent embossing strips (adjacent to the joined couple of the first and second plates) are crossed and brazed together to form other
brazing regions 53 d through whichcooling water passages 43 are formed. - As shown in FIGS. 5 and 6,
oil inlet hole 55 andoil outlet hole 59 are formed in both ends of the first andsecond plates oil inlet hole 55 andoil outlet hole 59 are removed to formmanifold parts manifold parts - The first and
second plates flange 63 is formed along the edge of each of the first andsecond plates flange 63 is provided with a markingpart 63 a so that the assembling direction can be recognized during the assembling. - The marking
part 63 a preferably consists of a slot or a bent protuberance, or a carving may be carried out. The markingpart 63 a is formed on one of the rounded parts of the plate. - The brazing face (bottom face) of the
flange 63 lies on the same level as that of an embossinginner face 53 b of the plate viewed when it is formed into tubes. The brazing face of the manifold part (57 or 61) lies on the same level as that of an embossingouter face 53 a of the plate viewed when it is formed into tubes. - Further, a
plate 51′ of the lowermost tube, which is closely joined to thelower end plate 47, is not provided with an oil inlet and outlet holes. - As shown in FIG. 7, an
outer face 53 a and aninner face 53 b of each of the embossing strips 53 are of a flat horizontal face, so that the joining can be rendered easier, and the joining strength can be strengthened. - In a sectional view of the
embossing strip 53, the horizontal distance L1 of theconnection face 53 e between the upper and lower faces (flat faces) is same as or larger than the length L2 of the horizontal face. - The connection face53 e is inclined, and therefore, the cross sectional view of the embossing strip is trapezoidal. The connection face 53 e can be a curved face. The
embossing strip 53 is straight. - Both ends of the
upper end plate 45 are respectively provided withholes oil inlet hole 55 andoil outlet hole 59. Thetubular connection devices holes upper end plate 45 and into theholes first plate 49 respectively. - As shown in FIG. 9, the
tubular connection parts - The
parts tubular connection parts holes upper end plate 45 and into theholes first plate 49 respectively, are made to undergo an expansion process, before being brazed to theupper end plate 45. -
Bent protuberances upper end plate 45 or on ends of thelower end plate 47, so that the assembling can be rendered easier. - In this oil cooler, when the first and
second plates second plates flanges 63 are braze-joined together. - As shown in FIG. 8, the embossing strips53 are crossedly contacted to each other, and thus, the spaces other than the
brazing regions 53 c form oil passages. Further, theflange 63 is formed all around, and therefore, any leakage of the oil can be prevented. - In FIG. 8, the solid lines indicate the embossing strips of the
first plate 49, while the dotted lines which cross the solid lines indicate the embossing strips of the second plate. - Further, in the
oil passages 41 which is formed by overlappedly coupling the first andsecond plates - Further, if a plurality of the pairs of the plates, i.e., a plurality of the tube sets are stacked in the same direction, then the outside faces53 a of the first and
second plates water passages 43 are formed. - In these cooling
water passages 43 like in theoil passages 41, the flow of the cooling water is disturbed up and down and rightward and leftward, and therefore, the efficiency of the heat exchange with the oil is improved. - Further, the embossing strips53 are formed also around the
manifold parts second plates second plates tubes 42, the areas of themanifold parts - The regions around the
manifold parts manifold parts - Further, the marking
part 63 a is formed on only one face of each of the first andsecond plates tubes 42 by overlappedly coupling the upper andlower plates water passages 43 by stacking a plurality of thetubes 42, the first andsecond plates - Further, the
second plate 51 of the lowermost tube set is not provided with an oil inlet and an oil outlet, and therefore, the oil pressure withstanding strength is improved, while preserving the function of the oil passages, because the mentionedsecond plate 51 is braze-joined to thelower end plate 47. - The upper and
lower end plates - The
tubular connection parts upper end plate 45 through the tube expansion process as shown in FIG. 9, and therefore, theupper end plate 45 can also serve as a medium for braze-joining thetubular connection parts first plate 49 of the uppermost tube set. - Further, a pair of
protuberance parts lower end plates protuberance parts - The assembling is carried out in such a manner that the
protuberance part 45 c should surround the uppermostfirst plate 49, and therefore, theholes upper end plate 45 can be easily aligned to the oil i/o holes 55 and 59 of thefirst plate 49. - FIG. 8 is a plan view of the
brazing regions 53 c and oil passage regions, when the first andsecond plates - The
brazing regions 53 c are provided all along theflange 63 continuously. Therefore, thebrazing regions 53 c of the first andsecond plates - Further, since the
brazing regions 53 c in theoil passages 41 are formed all along theflange 63, the first andsecond plates tubes 42 for forming theoil passages 41. - A plurality of these
tubes 42 are stacked in the same direction to form the coolingwater passages 43. The contact points of the embossing strips 53, i.e., thebrazing regions 53 d of the side of the cooling water passages 43 (refer to FIG. 4) are positioned where the cooling water starts to contact. - In this manner, if the tube sets are stacked up to some layers, the brazing layers53 d of the embossing strips 53 to the side of the cooling
water passages 43 are assured to the maximum area, thereby improving the oil pressure withstanding strength. - Further, in a sectional view of the
embossing strip 53, the connection face which connects the horizontal faces 53 a and 53 b has a horizontal distance L1 same as or larger than the length L2. Accordingly, the brazing areas are reduced, while the heat exchange areas are increased, resulting in that the passage resistance is reduced, thereby improving the heat exchange efficiency. - FIG. 10 is a plan view of another embodiment of the first and second plates used in the
oil cooler 35 according to the present invention. - Here, embossing strips73 are bent along the centerlines of first and second plates 71 and 72 to form a “<” shape (i.e., a “V-shape”). The first and second plates 71 and 72 are provided with a
flange 81 along their edges so that the plates can be coupled together to form tubes. - As shown in FIG. 11, protruded
outer face 73 a andinner face 73 b of each of the embossing strips 73 are flat so that the joining can be easy and strong. - Further, in a sectional view of the
embossing strip 73, the horizontal distance L1 of aconnection face 73 e which connects the upper face (flat face) and the bottom face (flat face) is same as or larger than the length L2 of the flat face. - Thus the brazing areas are reduced, and the heat exchange areas are increased, resulting in that the heat exchange efficiency is improved. The connection faces73 e are inclined, and therefore, the cross section is trapezoidal. The connection face 73 e can be made curved.
- In the case where the embossing strips73 are of a “<” shape, the first and second plates are coupled together with the first plate 71 is rotated by 180 degrees and with the second plate 72 not rotated, thereby forming the oil passages and the cooling water passages.
- Surrounding each of
oil inlet hole 83 andoil outlet hole 85 of the first and second plates 71 and 72, there are disposed a plurality ofembossing protuberances 79, and therefore, theembossing protuberances 79 of the first and second plates 71 and 72 are joined to each other regardless of the joining direction of the first and second plates 71 and 72. - The embossing strips are removed around the
oil inlet hole 83 andoil outlet hole 85 respectively to formmanifold parts manifold parts embossing protuberances 79. - Further, in forming the tubes, i.e., the oil passages by coupling the first and second plates71 and 72, and in forming the cooling water passages by stacking a plurality of the tubes, the following features are provided.
- That is, the assembling direction of the first and second plates can be easily confirmed by the following measures. That is, a slot81 a is formed on one end of each of the first and second plates 71 and 72, while a
protuberance 81 b is provided on the other end of each of the first and second plates. Further, a slot or aprotuberance 81 c is formed at the middle between the slot 81 a and theprotuberance 81 b. - Accordingly, if the first and second plates71 and 72 are coupled together with the first plate 71 rotated by 180 degrees and with the second plate 72 not rotated, then the
protuberance 81 b is mated to the slot 81 a, and therefore, the assembling direction of the plates can be confirmed. - A plurality of the oil passages are stacked by utilizing the slot or protuberance which is formed on only one side of the flange between the both ends of the plates. Under this condition, it can be confirmed that a pair of the oil passages are assembled in the same direction.
- In the
oil cooler 35 of the present invention as presented above with the different embodiments, the oil flows in through thetubular connection device 37 to enter into therespective manifold parts 57. - Then the oil is distributed from the
manifold parts 57 to therespective oil passages 41 so as to move in the lengthwise direction of thetubes 42. Then the oil is collected into themanifold part 61 to be returned through thetubular connection device 39. - Under this condition, the cooling water within the radiator flows to the cooling
water passages 43, so that the oil of theoil passages 41 and the cooling water of the coolingwater passages 43 would be subjected to heat exchanges, thereby lowering the temperature of the oil. - The above described oil cooler35 should be preferably manufactured by the continuous furnace process, and for this purpose, the components should be preferably made of aluminum. Particularly, the portions on which the brazing joining is carried out should be preferably made of an aluminum alloy on which a filler metal for brazing is clad.
- Of course, first the components can be made of stainless steel or nickel steel, and then a thin copper sheet is adopted as the filler metal.
- Further, besides the illustrated shapes, the plates can be formed in oval, rectangular, polygonal and the like. In any case of shape, the method of forming the oil passages and the cooling water passages is same as the above described embodiments.
- Further, the above embodiments are for the oil cooler for the vehicle transmission, but if the plates are made round, they can be applied to the engine oil cooler.
- According to the present invention as described above, the embossing strips are formed over the entire surface of the upper and lower plates, and therefore, the areas of the heat exchange are increased. Further, the flows of the oil and the cooling water are not straight, but are broken down up and down and leftward and rightward.
- Thus sufficient disturbances are realized for the flows of the oil and the cooling water so as to improve the efficiency of the heat exchange. Further, the braze-joining regions are formed at regular intervals in the oil passages and the cooling water passages, and therefore, the oil pressure withstanding characteristics are improved.
- Further, the conventional internal fin and the external fin, which are inserted into the oil passages and the cooling water passages for disturbing the flows of the oil and the cooling water, are eliminated. Consequently, the material cost and the processing cost are lowered, and the die cost and the facility cost are curtailed, so as to ultimately save the manufacturing cost of the oil cooler.
Claims (15)
1. An oil cooler comprising:
first and second plates joined together to form tubes of oil passages;
the tubes being stacked in a plurality to form cooling water passages between them;
the first and second plates being embossed in a lateral direction in skew to form a plurality of embossing strips, and the embossing strips being repeatedly formed along a length of each of the first and second plates;
the embossing strips of the first and second plates being crossed and joined, and adjacent embossing strips (adjacent to the joined couple of the first and second plates) being also mutually crossed and joined; and
oil inlet /outlet holes formed in both ends of the first and second plates, manifold parts of a certain area formed around the i/o holes, and the embossing strips being preserved around the manifold parts.
2. The oil cooler as claimed in claim 1 , wherein a projected outer faces of each of the embossing strips are flat to make it easy to join and to reinforce a joining strength.
3. The oil cooler as claimed in claim 2 , wherein in a sectional view of the embossing strip, a horizontal distance L1 of a connection face between a flat face and another flat face is same as or larger than a length of the flat face.
4. The oil cooler as claimed in claim 1 , wherein the connection face is inclined, and therefore, the embossing strip has a trapezoidal cross section.
5. The oil cooler as claimed in claim 1 , wherein the embossing strip is straight.
6. The oil cooler as claimed in claim 1 , wherein the embossing strips are bent at their middle to form a V-shape.
7. The oil cooler as claimed in claim 1 , wherein a flange is formed around an entire edge of each of the first and second plates so as to form tubes when the first and second plates are joined together.
8. The oil cooler as claimed in claim 7 , wherein the flange is provided with a marking part.
9. The oil cooler as claimed in claim 8 , wherein the marking part comprises a slot or a bent protuberance.
10. The oil cooler as claimed in claim 1 , wherein surrounding each of oil i/o holes of the first and second plates, there are disposed a plurality of embossing protuberances, and therefore, the embossing protuberances of the first and second plates are joined to each other at a same point regardless of a joining direction of the first and second plates.
11. The oil cooler as claimed in claim 1 , further comprising:
an upper end plate coupled to an uppermost tube set, for increasing an oil pressure withstanding strength;
a pair of tubular connection devices fitted to the upper end plate, for being communicated to the oil inlet/outlet holes; and
an end of each of the tubular connection devices being fitted to the first plate through a tube expansion process before being brazed.
12. The oil cooler as claimed in claim 1 , further comprising: a lower end plate coupled to a bottom of a lowermost tube set, for increasing the oil pressure withstanding strength; and a plate of the lowermost tube set not having an oil i/o hole, and the plate being joined to the lower end plate.
13. The oil cooler as claimed in claim 11 , wherein bent protuberances are formed on both ends of the upper end plate or the lower end plate, so as to make it easy to assemble.
14. The oil cooler as claimed in claim 1 , wherein the oil cooler is made of an aluminum-clad material, and respective joining parts are braze-joined.
15. The oil cooler as claimed in claim 1 , wherein the oil cooler is made of stainless steel and the respective joining parts are made of a filler metal plate with a thin copper sheet or nickel sheet, and are braze-joined.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20010081082 | 2001-12-19 | ||
KRP2001-81082 | 2001-12-19 | ||
KRP2002-68739 | 2002-11-07 | ||
KR1020020068739A KR20030051213A (en) | 2001-12-19 | 2002-11-07 | Oil cooler |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030131979A1 true US20030131979A1 (en) | 2003-07-17 |
Family
ID=26639527
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/316,833 Abandoned US20030131979A1 (en) | 2001-12-19 | 2002-12-12 | Oil cooler |
Country Status (1)
Country | Link |
---|---|
US (1) | US20030131979A1 (en) |
Cited By (16)
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EP1541955A2 (en) * | 2003-12-08 | 2005-06-15 | Calsonic Kansei Corporation | Oil-cooler equipped radiator |
FR2866699A1 (en) * | 2004-02-23 | 2005-08-26 | Barriquand Echangeurs | Heat exchanger for transferring heat energy, has plates connected together such that outer and inner edges are joined to form single block circuit, and circulation unit circulating fluid between other outer edges and sides of plates |
WO2005088223A1 (en) * | 2004-03-11 | 2005-09-22 | Behr Gmbh & Co. Kg | Stacked-plate heat exchanger |
EP1654511A1 (en) * | 2003-08-01 | 2006-05-10 | Showa Denko K.K. | Heat exchanger |
US20070199687A1 (en) * | 2004-03-11 | 2007-08-30 | Behr Gmbh & Co. Kg | Stacked-Plate Heat Exchanger |
WO2009033883A1 (en) * | 2007-09-11 | 2009-03-19 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Device comprising a soldered heat exchanger for an internal combustion engine |
US20100059215A1 (en) * | 2008-09-11 | 2010-03-11 | Proliance International Inc. | Plate type oil cooler |
US20110011568A1 (en) * | 2008-07-10 | 2011-01-20 | Sang Chul Han | Oil cooler for transmission |
US20120012289A1 (en) * | 2010-07-15 | 2012-01-19 | Dana Canada Corporation | Annular Axial Flow Ribbed Heat Exchanger |
US20120118548A1 (en) * | 2009-07-27 | 2012-05-17 | Korea Delphi Automotive Systems Corporation | Plate Heat Exchanger |
RU2485428C1 (en) * | 2011-12-29 | 2013-06-20 | Виктор Васильевич Кудрявцев | Method to cool two flows of coolant |
US20140008047A1 (en) * | 2011-04-18 | 2014-01-09 | Mitsubishi Electric Corporation | Plate heat exchanger and heat pump apparatus |
JP2014509250A (en) * | 2011-01-18 | 2014-04-17 | シュティヒティン・エネルギーオンデルツォイク・セントラム・ネーデルランド | Heat exchange distillation column using structured packing |
US20150285572A1 (en) * | 2014-04-08 | 2015-10-08 | Modine Manufacturing Company | Brazed heat exchanger |
EP1842020B1 (en) * | 2005-01-14 | 2017-12-13 | MAHLE Behr GmbH & Co. KG | Plate heat exchanger |
US11280560B1 (en) * | 2020-12-08 | 2022-03-22 | Dana Canada Corporation | Heat exchanger with two-piece through fittings |
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EP1654511A4 (en) * | 2003-08-01 | 2012-05-30 | Showa Denko Kk | Heat exchanger |
EP1654511A1 (en) * | 2003-08-01 | 2006-05-10 | Showa Denko K.K. | Heat exchanger |
EP1541955A2 (en) * | 2003-12-08 | 2005-06-15 | Calsonic Kansei Corporation | Oil-cooler equipped radiator |
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EP1842020B1 (en) * | 2005-01-14 | 2017-12-13 | MAHLE Behr GmbH & Co. KG | Plate heat exchanger |
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CN101970907A (en) * | 2008-07-10 | 2011-02-09 | 韩国德尔福汽车系统公司 | Oil cooler for transmission |
US20110011568A1 (en) * | 2008-07-10 | 2011-01-20 | Sang Chul Han | Oil cooler for transmission |
US20100059215A1 (en) * | 2008-09-11 | 2010-03-11 | Proliance International Inc. | Plate type oil cooler |
US20120118548A1 (en) * | 2009-07-27 | 2012-05-17 | Korea Delphi Automotive Systems Corporation | Plate Heat Exchanger |
US9250019B2 (en) * | 2009-07-27 | 2016-02-02 | Korea Delphi Automotive Systems Corporation | Plate heat exchanger |
EP2461128A2 (en) * | 2009-07-27 | 2012-06-06 | Korea Delphi Automotive Systems Corporation | Plate heat exchanger |
EP2461128A4 (en) * | 2009-07-27 | 2014-03-05 | Korea Delphi Automotive System | Plate heat exchanger |
US20120012289A1 (en) * | 2010-07-15 | 2012-01-19 | Dana Canada Corporation | Annular Axial Flow Ribbed Heat Exchanger |
US8944155B2 (en) * | 2010-07-15 | 2015-02-03 | Dana Canada Corporation | Annular axial flow ribbed heat exchanger |
JP2014509250A (en) * | 2011-01-18 | 2014-04-17 | シュティヒティン・エネルギーオンデルツォイク・セントラム・ネーデルランド | Heat exchange distillation column using structured packing |
US20140008047A1 (en) * | 2011-04-18 | 2014-01-09 | Mitsubishi Electric Corporation | Plate heat exchanger and heat pump apparatus |
US9448013B2 (en) * | 2011-04-18 | 2016-09-20 | Mitsubishi Electric Corporation | Plate heat exchanger and heat pump apparatus |
RU2485428C1 (en) * | 2011-12-29 | 2013-06-20 | Виктор Васильевич Кудрявцев | Method to cool two flows of coolant |
WO2015157368A1 (en) * | 2014-04-08 | 2015-10-15 | Modine Manufacturing Company | Brazed heat exchanger |
US20150285572A1 (en) * | 2014-04-08 | 2015-10-08 | Modine Manufacturing Company | Brazed heat exchanger |
US11280560B1 (en) * | 2020-12-08 | 2022-03-22 | Dana Canada Corporation | Heat exchanger with two-piece through fittings |
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Legal Events
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AS | Assignment |
Owner name: LEADER OF THERMAL SYSTEM CO., LTD., KOREA, REPUBLI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KIM, HYEONG-KI;REEL/FRAME:013573/0836 Effective date: 20021128 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |