US20160327348A1 - Corrugated fin and heat exchanger including the same - Google Patents
Corrugated fin and heat exchanger including the same Download PDFInfo
- Publication number
- US20160327348A1 US20160327348A1 US15/216,299 US201615216299A US2016327348A1 US 20160327348 A1 US20160327348 A1 US 20160327348A1 US 201615216299 A US201615216299 A US 201615216299A US 2016327348 A1 US2016327348 A1 US 2016327348A1
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- United States
- Prior art keywords
- groove
- flat plate
- pair
- corrugated fin
- plate section
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/30—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being attachable to the element
-
- 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
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
- F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- 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
- F28D2021/0091—Radiators
- F28D2021/0094—Radiators for recooling the engine coolant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2215/00—Fins
- F28F2215/10—Secondary fins, e.g. projections or recesses on main fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/04—Fastening; Joining by brazing
Definitions
- the present invention relates to a corrugated fin for dissipating heat of a heat exchange medium in a heat exchanger such as a radiator, an oil cooler or an after-cooler.
- the invention also relates to the heat exchanger including the corrugated fin.
- an engine In an engine room of a work vehicle such as a hydraulic excavator or a bulldozer, an engine, a radiator, a cooling fan and others are placed in a predetermined pattern of locations. When driven, the cooling fan causes a flow of cooling air which passes through the radiator, thereby cooling engine cooling water circulating between the engine and the radiator.
- the radiator is constructed mainly of a top tank, a bottom tank, a plurality of tubes and fins.
- the top tank and the bottom tank are coupled through the plurality of tubes arranged at predetermined intervals.
- the engine cooling water coming from the engine is once stored in the top tank, then passes through the plurality of tubes to be stored in the bottom tank, and is then returned to the engine.
- the fins are each disposed between the adjacent tubes and joined to the tubes by joining means such as brazing.
- corrugated fin having flat plate sections and joining sections that are alternately formed into a corrugated shape by bending (refer to, for example, patent documents 1, 2 and 3).
- the flat plate sections of such a corrugated fin each has a pair of lateral sides facing each other and a pair of end sides facing each other, while the joining sections each connect with the lateral sides of the flat plate sections.
- the corrugated fin is manufactured, for example, by undergoing a grooving process and a corrugating process.
- the grooving process is a process of forming a plurality of grooves on a surface of a bandlike sheet by passing the bandlike sheet uncoiled from a sheet coil between a pair of grooving rollers or by press working using a press machine.
- the bandlike sheet which has undergone the grooving process is passed through a pair of corrugating rollers for bending, whereby the flat plate sections and the joining sections form a corrugated shape in an alternating sequence.
- Examples of the grooves formed in the bandlike sheet in the grooving process include grooves extending in a direction in which the pair of lateral sides of the flat plate section are arranged and grooves extending in a direction in which the pair of end sides of the flat plate section are arranged.
- Providing the flat plate section with the grooves extending in the direction in which the pair of lateral sides are arranged can increase a section modulus of a section taken along the direction in which the pair of end sides are arranged. Accordingly, the flat plate section can have increased rigidity with respect to such a bending action as to bring the pair of lateral sides close to each other.
- a section taken along the direction in which the pair of lateral sides are arranged cannot have an increased section modulus, so that the flat plate section cannot have increased rigidity with respect to such a bending action as to bring the pair of end sides close to each other.
- Providing the flat plate section with the grooves extending in the direction in which the pair of end sides are arranged can increase a section modulus of a section taken along the direction in which the pair of lateral sides are arranged. Accordingly, the flat plate section can have increased rigidity with respect to such the bending action as to bring the pair of end sides close to each other.
- a section taken along the direction in which the pair of end sides are arranged cannot have an increased section modulus, so that the flat plate section cannot have increased rigidity with respect to such the bending action as to bring the pair of lateral sides close to each other.
- the dimensional errors of the corrugated fins accumulate when a radiator core is assembled by alternately stacking the corrugated fins and the tubes, which in turn may warp the radiator core, leaving a problem that product accuracy is difficult to improve. Correcting the dimensional error of the corrugated fin requires extra time and effort, while assembling such that the dimensional errors of the corrugated fins offset one another requires a high skill. In any case, the production problematically becomes difficult.
- the present invention aims to provide a corrugated fin capable of reliably preventing bending at an unexpected place during production, thereby improving product accuracy and facilitating the production.
- the invention also aims to provide a heat exchanger including this corrugated fin.
- a corrugated fin for a heat exchanger comprises a flat plate section and a joining section which are alternately formed into a corrugated shape by bending, said flat plate section having a pair of lateral sides facing each other and a pair of end sides facing each other, said joining section connecting with a lateral side of the pair of lateral sides of the flat plate section,
- joining section has an even surface joined to a tube through which a heat exchange medium is circulated and
- said flat plate section has at least one recess or protrusion in an arbitrary section taken in two directions, the two directions being a direction in which the pair of lateral sides are arranged and a direction in which the pair of end sides are arranged.
- the even surface of the joining section is formed into a plane surface.
- the even surface of the joining section is formed into a curved surface.
- a fourth aspect of the invention that is based on the first, second or third aspect, it is preferable that two or more recesses or protrusions are provided.
- a heat exchanger includes the corrugated fin of the first, second, third or fourth aspect.
- the flat plate section is provided with at least one recess or protrusion in the arbitrary section taken in the two directions, that is, the direction in which the pair of lateral sides are arranged and the direction in which the pair of end sides are arranged. Accordingly, the section taken along the direction in which the pair of end sides are arranged and the section taken along the direction in which the pair of lateral sides are arranged can have increased section moduli, respectively. For this reason, the flat plate section can have increased rigidity with respect to such a bending action as to bring the pair of lateral sides close to each other as well as with respect to such a bending action as to bring the pair of end sides close to each other.
- the joining section is not provided with any recess or protrusion such as provided in the flat plate section. This allows a large difference in rigidity between the flat plate section and the joining section, thus enabling easy and reliable bending at a boundary between the flat plate section and the joining section.
- corrugated fin of the first aspect of the invention bending at an unexpected place can be prevented without fail during production of the corrugated fin, whereby the corrugated fin can have a reduced dimensional error.
- Adopting the structure of the second aspect of the invention can increase an area joined to the tube and a thermal contact area, thus allowing stronger joining between the corrugated fin and the tube and enhancing a heat dissipation effect of the corrugated fin.
- Adopting the structure of the third aspect of the invention can avoid stress concentration on a bent part.
- Adopting the structure of the fourth aspect of the invention can further increase the rigidity of the flat plate section without fail and allows easier and more reliable bending at the boundary between the flat plate section and the joining section.
- the heat exchanger of the fifth aspect of the invention has increased product accuracy and is thus easy to produce.
- FIG. 1 is a general perspective view of a radiator in accordance with a first exemplary embodiment of the present invention.
- FIG. 2 is an enlarged perspective view of part X in FIG. 1 .
- FIG. 3 ( a ) illustrates the structure of a flat plate section viewed from the direction of arrow Y in FIG. 2
- FIGS. 3 ( b ) , 3 ( c ) and 3 ( d ) are sectional views taken along respective lines A-A, B-B, B′-B′ in FIG. 3 ( a ) .
- FIG. 4 is an enlarged view of an essential part viewed from the direction of arrow Z in FIG. 2 .
- FIG. 5 ( a ) illustrates a method of manufacturing a corrugated fin
- FIG. 5 ( b ) is a state view before corrugation
- FIG. 5 ( c ) is a state view after the corrugation
- FIGS. 5 ( d ) and 5 ( e ) illustrate respective shapes of an even surface, with FIG. 5 ( d ) illustrating a plane surface and FIG. 5 ( e ) illustrating a curved surface.
- FIGS. 6 ( a ) to 6 ( f ) illustrate variations of the corrugated fin in accordance with the first embodiment.
- FIG. 7 ( a ) illustrates the structure of a flat plate section of a corrugated fin in accordance with a second exemplary embodiment
- FIGS. 7 ( b ) , 7 ( c ) and 7 ( d ) are sectional views taken along respective lines C-C, D-D, D′-D′ in FIG. 7 ( a ) .
- FIG. 8 ( a ) illustrates the structure of a flat plate section of a corrugated fin in accordance with a third exemplary embodiment
- FIGS. 8 ( b ) , 8 ( c ) and 8 ( d ) are sectional views taken along respective lines E-E, F-F, F′-F′ in FIG. 8 ( a ) .
- FIG. 9 ( a ) illustrates the structure of a flat plate section of a corrugated fin in accordance with a fourth exemplary embodiment
- FIGS. 9 ( b ) and 9 ( c ) are sectional views taken along respective lines G-G, H-H in FIG. 9 ( a ) .
- FIG. 10 ( a ) illustrates the structure of a flat plate section of a corrugated fin in accordance with a fifth exemplary embodiment
- FIGS. 10 ( b ) and 10 ( c ) are sectional views taken along respective lines I-I, J-J in FIG. 10( a ) .
- FIG. 11 ( a ) illustrates the structure of a flat plate section of a corrugated fin in accordance with a sixth exemplary embodiment
- FIGS. 11 ( b ) and 11 ( c ) are sectional views taken along respective lines K-K, L-L in FIG. 11 ( a ) .
- FIG. 12 ( a ) illustrates the structure of a flat plate section of a corrugated fin in accordance with a seventh exemplary embodiment
- FIGS. 12 ( b ) , 12 ( c ), 12 ( d ) and 12 ( e ) are sectional views taken along respective lines M-M, M′-M′, N-N, N′-N′ in FIG. 12 ( a ) .
- FIG. 13 ( a ) illustrates the structure of a flat plate section of a corrugated fin in accordance with an eighth exemplary embodiment
- FIGS. 13 ( b ) and 13 ( c ) are sectional views taken along respective lines Q-Q, R-R in FIG. 13 ( a ) .
- FIG. 1 is a general perspective view of a radiator including a corrugated fin in accordance with the first exemplary embodiment of the invention.
- Radiator 1 shown in FIG. 1 is a device for dissipating heat that engine cooling water (a heat exchange medium) circulating between radiator 1 and an engine (not shown) obtains from the engine.
- This radiator 1 is constructed mainly of top tank 2 , bottom tank 3 , tubes 4 and corrugated fins 5 .
- Top tank 2 and bottom tank 3 are coupled through the plurality of tubes 4 , thus allowing the engine cooling water coming from the engine to be once stored in top tank 2 , then pass through the plurality of tubes 4 to be stored in bottom tank 3 and be returned to the engine thereafter.
- Tubes 4 and corrugated fins 5 are alternately stacked to form radiator core 6 .
- tubes 4 are each formed of a flattened tube member having internal passage 4 a for the engine cooling water.
- the plurality of tubes 4 are arranged at predetermined pitch Pa along width direction RW of radiator 1 and at predetermined spacing S along depth direction RD of radiator 1 .
- Corrugated fin 5 is disposed between tubes 4 which are adjacent in width direction RW of radiator 1 .
- Corrugated fin 5 has flat plate sections 5 a and joining sections 5 b that are alternately formed into a corrugated shape by bending.
- Each flat plate section 5 a is a rectangular plate section having a pair of lateral sides 11 , 11 ′ facing each other in width direction RW of radiator 1 and a pair of end sides 12 , 12 ′ facing each other in depth direction RD of radiator 1 .
- flat plate section 5 a is provided with, on its surface, the plurality of groove-shaped recesses 13 regularly spaced at predetermined pitch Pb along direction FD in which the pair of end sides 12 , 12 ′ are arranged.
- Groove-shaped recesses 13 extend linearly in a direction from end side 12 toward end side 12 ′ while slanting in a direction from lateral side 11 toward lateral side 11 ′.
- Pitch Pb for arranging groove-shaped recesses 13 , an angle of inclination, length and width of each groove-shaped recess 13 and others are determined so that adjacent groove-shaped recesses 13 partly overlap each other when viewed in direction FW in which the pair of lateral sides 11 , 11 ′ are arranged.
- Providing the plurality of groove-shaped recesses 13 on the surface of flat plate section 5 a causes a part between adjacent groove-shaped recesses 13 to become relatively stripe-shaped protrusion 14 .
- providing groove-shaped recesses 13 on the surface of flat plate section 5 a results in formation of corresponding stripe-shaped protrusions 15 (see FIGS. 3 ( b ) and 3 ( c )) on a back surface of flat plate section 5 a.
- flat plate section 5 a has the plurality of recesses 16 defined by the respective plurality of groove-shaped recesses 13 in the arbitrary section taken along direction FD in which the pair of end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has the plurality of protrusions 17 , 18 defined by the respective plurality of stripe-shaped protrusions 14 , 15 in the arbitrary section taken along direction FD in which end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has recesses 16 defined by respective groove-shaped recesses 13 in the arbitrary sections taken along direction FW in which the pair of lateral sides 11 , 11 ′ are arranged.
- flat plate section 5 a has protrusions 17 , 18 defined by respective stripe-shaped protrusions 14 , 15 in the arbitrary sections taken along direction FW in which lateral sides 11 , 11 ′ are arranged. It is to be noted that there exists, as shown in FIG.
- joining section 5 b is a rectangular plate section which makes a right angle with flat plate section 5 a , is narrower than flat plate section 5 a and has even surface 20 joined to tube 4 .
- Even surface 20 is a plane surface parallel to surface 21 of tube 4 .
- this even surface 20 has two implications, one of which is that surface 20 is a completely even surface free of undulation and the other of which is that surface 20 is a substantially even surface having, compared with groove-shaped recesses 13 , extremely negligible shallow grooves (grooved remnants) which are formed inevitably when a grooving process is carried out to form groove-shaped recesses 13 in flat plate section 5 a.
- Corrugated fin 5 and tube 4 are joined together by brazing using brazing filler metal 22 interposed between even surface 20 of joining section 5 b and surface 21 of tube 4 .
- even surface 20 of joining section 5 b can have a larger area joined to tube 4 and a larger thermal contact area compared to cases where even surface 20 is a curved surface or an angular surface.
- the manufacturing method of corrugated fin 5 includes the grooving process and a corrugating process.
- the grooving process is a process of forming the plurality of groove-shaped recesses 13 on a surface of bandlike sheet 30 a , a corrugated fin material, by passing bandlike sheet 30 a uncoiled from sheet coil 30 between a pair of first rollers 31 , 31 ′.
- the pair of first rollers 31 , 31 ′ have a plurality of recesses and protrusions (not shown) on their outer peripheral surfaces to correspond to the plurality of groove-shaped recesses 13 to be formed in bandlike sheet 30 a .
- bandlike sheet 30 a is sandwiched between these rollers 31 , 31 ′ and then sent downstream.
- the plurality of groove-shaped recesses 13 are formed on the surface of bandlike sheet 30 a as a result of bandlike sheet 30 a being sandwiched between the recesses of first roller 31 on one side and the protrusions of first roller 31 ′ on the other side.
- similar groove-shaped recesses 13 can be formed on the surface of bandlike sheet 30 a by press working using a press machine.
- the corrugating process is a bending process in which bandlike sheet 30 a coming out from between the pair of first rollers 31 , 31 ′ is passed through a pair of second rollers 32 , 32 ′ disposed downstream of first rollers 31 , 31 ′, whereby flat plate sections 5 a and joining sections 5 b form the corrugated shape in an alternating sequence.
- the pair of second rollers 32 , 32 ′ have a plurality of teeth (not shown) on their outer peripheral surfaces for bending bandlike sheet 30 a , which has groove-shaped recesses 13 formed on its surface, into the corrugated shape.
- the teeth of roller 32 and the teeth of roller 32 ′ are formed to mesh together.
- bandlike sheet 30 a is sandwiched between these rollers 32 , 32 ′ and then sent downstream.
- bandlike sheet 30 a is bent into the corrugated shape as a result of being sandwiched between a space between the teeth of second roller 32 and the tooth of second roller 32 ′.
- bandlike sheet 30 a which will undergo the corrugation has sections (indicated by arrows T in the drawing) free of groove-shaped recesses 13 and stripe-shaped protrusions 14 resulting from groove-shaped recesses 13 .
- the corrugation is carried out so that these sections become joining sections 5 b each having even surface 20 (see FIG. 5 ( c ) ).
- even surface 20 is plane as shown in FIG. 5 ( d ) .
- even surface 20 is not limited to this and may also be curved as shown in FIG. 5 ( e ) . Forming even surface 20 into the curved surface can avoid stress concentration on a bent part.
- Corrugated fin 5 which has undergone the corrugating process is thus sandwiched between adjacent tubes 4 and joined to those tubes 4 by brazing.
- flat plate section 5 a is provided with, as shown in FIGS. 3 ( b ) and 3 ( c ), recesses 16 defined by groove-shaped recesses 13 or protrusions 17 , 18 defined by stripe-shaped protrusions 14 , 15 in the arbitrary sections taken along the respective two directions, that is, direction FW in which the pair of lateral sides 11 , 11 ′ are arranged and direction FD in which the pair of end sides 12 , 12 ′ are arranged.
- This can increase a section modulus of the section taken along direction FD in which end sides 12 , 12 ′ are arranged as well as a section modulus of the section taken along direction FW in which lateral sides 11 , 11 ′ are arranged.
- flat plate section 5 a can have increased rigidity with respect to such a bending action as to bring lateral sides 11 , 11 ′ close to each other as well as with respect to such a bending action as to bring end sides 12 , 12 ′ close to each other.
- Joining section 5 b is not provided with recess 16 defined by groove-shaped recess 13 or protrusions 17 , 18 defined by respective stripe-shaped protrusions 14 , 15 such as provided at flat plate section 5 a .
- This allows a large difference in rigidity between flat plate section 5 a and joining section 5 b , thus enabling easy and reliable bending at a boundary between flat plate section 5 a and joining section 5 b.
- Radiator core 6 of radiator 1 of the first embodiment is assembled by alternately stacking tubes 4 and corrugated fins 5 . Because the dimensional error of each corrugated fin 5 can be reduced, radiator core 6 does not warp, thereby increasing product accuracy. Moreover, no correction of the dimensional error of corrugated fin 5 and no high skill for offsetting the dimensional errors against one another are required, thus facilitating the production.
- FIGS. 6 ( a ) to 6 ( f ) are plan views of respective flat plate sections 5 a , illustrating the variations of corrugated fin 5 of the first embodiment.
- Corrugated fin 5 of the first embodiment has, at its flat plate section 5 a , at least one recess 16 defined by groove-shaped recess 13 in the arbitrary section taken along each of the two directions, that is, direction FW in which the pair of lateral sides 11 , 11 ′ are arranged and direction FD in which the pair of end sides 12 , 12 ′ are arranged.
- direction FW in which the pair of lateral sides 11 , 11 ′ are arranged
- direction FD in which the pair of end sides 12 , 12 ′ are arranged.
- groove-shaped recess 13 can be replaced by groove-shaped recess 13 A having a greater groove width than recess 13 as shown in FIG. 6 ( a ) .
- pitch Pb at which groove-shaped recesses 13 are arranged can be changed to smaller pitch Pc.
- groove-shaped recesses 13 can be arranged at at least two different pitches Pd, Pe.
- groove-shaped recesses 13 , 13 A of different groove widths can be alternately arranged.
- a plurality of groove-shaped recesses 13 B shorter in length than groove-shaped recesses 13 are arranged alternately as equivalents of recesses 13 .
- groove-shaped recesses 13 extend linearly in the direction from end side 12 of flat plate section 5 a toward end side 12 ′, slanting in the direction from lateral side 11 toward lateral side 11 ′
- groove-shaped recesses 13 C shown in FIG. 6 ( f ) can be adopted instead. These recesses 13 C extend linearly in the direction from end side 12 of flat plate section 5 a toward end side 12 ′ while slanting in an opposite direction, that is, from lateral side 11 ′ toward lateral side 11 .
- corrugated fins 5 A to 5 G in accordance with the respective second through eighth exemplary embodiments of the present invention are provided one by one.
- elements similar to those in the first embodiment have the same reference marks in drawings, the detailed descriptions of those elements are omitted, and emphasis is placed on different features not seen in the first embodiment.
- corrugated fin 5 A of the second embodiment has, on a surface of its flat plate section 5 a , the plurality of groove-shaped recesses 40 regularly spaced at predetermined pitch Pf along direction FD in which a pair of end sides 12 , 12 ′ are arranged.
- Each groove-shaped recess 40 is formed of first groove-shaped recess 40 a and second groove-shaped recess 40 b , and in the plan view with end side 12 ′ of flat plate section 5 a being above the other end side 12 , first and second groove-shaped recesses 40 a , 40 b connect in a V shape.
- first groove-shaped recess 40 a extends linearly in a direction from end side 12 toward end side 12 ′ while slanting in a direction from lateral side 11 toward lateral side 11 ′.
- second groove-shaped recess 40 b extends linearly in the direction from end side 12 toward end side 12 ′ while slanting in a direction from lateral side 11 ′ toward lateral side 11 .
- flat plate section 5 a has the plurality of recesses 41 defined by the respective plurality of groove-shaped recesses 40 in the arbitrary section taken along direction FD in which the pair of end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has the plurality of protrusions 44 , 45 defined by a respective plurality of stripe-shaped protrusions 42 , 43 in the arbitrary section taken along direction FD in which end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has recesses 41 defined by groove-shaped recesses 40 in the arbitrary sections taken along direction FW in which the pair of lateral sides 11 , 11 ′ are arranged.
- flat plate section 5 a has protrusions 44 , 45 defined by stripe-shaped protrusions 42 , 43 in the arbitrary sections taken along direction FW in which lateral sides 11 , 11 ′ are arranged. It is to be noted that there exists, as shown in FIG.
- corrugated fin 5 B of the third embodiment has, on a surface of its flat plate section 5 a , the plurality of groove-shaped recesses 46 regularly spaced at predetermined pitch Pg along direction FD in which a pair of end sides 12 , 12 ′ are arranged.
- Groove-shaped recesses 46 are recesses each bent into an arc shape, bulging toward end side 12 between lateral sides 11 , 11 ′.
- flat plate section 5 a has the plurality of recesses 47 defined by the respective plurality of groove-shaped recesses 46 in the arbitrary section taken along direction FD in which the pair of end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has the plurality of protrusions 50 , 51 defined by a respective plurality of stripe-shaped protrusions 48 , 49 in the arbitrary section taken along direction FD in which end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has recesses 47 defined by groove-shaped recesses 46 in the arbitrary sections taken along direction FW in which the pair of lateral sides 11 , 11 ′ are arranged.
- flat plate section 5 a has protrusions 50 , 51 defined by stripe-shaped protrusions 48 , 49 in the arbitrary sections taken along direction FW in which lateral sides 11 , 11 ′ are arranged. It is to be noted that there exists, as shown in FIG.
- corrugated fin 5 C of the fourth embodiment has, on a surface of its flat plate section 5 a , the plurality of groove-shaped recesses 52 regularly spaced at predetermined pitch Ph along direction FD in which a pair of end sides 12 , 12 ′ are arranged.
- Each groove-shaped recess 52 is formed of first groove-shaped recess 52 a , second groove-shaped recess 52 b , third groove-shaped recess 52 c and fourth groove-shaped recess 52 d , and in the plan view with end side 12 ′ of flat plate section 5 a being above the other end side 12 , those first through fourth groove-shaped recesses 52 a , 52 b , 52 c , 52 d connect in a W shape.
- first groove-shaped recess 52 a extends linearly in a direction from end side 12 toward end side 12 ′ while slanting in a direction from lateral side 11 toward lateral side 11 ′.
- second groove-shaped recess 52 b extends linearly in the direction from end side 12 toward end side 12 ′ while slanting in a direction from lateral side 11 ′ toward lateral side 11 .
- third groove-shaped recess 52 c extends linearly in the direction from end side 12 toward end side 12 ′ while slanting in the direction from lateral side 11 toward lateral side 11 ′.
- fourth groove-shaped recess 52 d extends linearly in the direction from end side 12 toward end side 12 ′ while slanting in the direction from lateral side 11 ′ toward lateral side 11 .
- flat plate section 5 a has the plurality of recesses 53 defined by the respective plurality of groove-shaped recesses 52 in the arbitrary section taken along direction FD in which the pair of end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has the plurality of protrusions 56 , 57 defined by a respective plurality of stripe-shaped protrusions 54 , 55 in the arbitrary section taken along direction FD in which end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has at least two recesses 53 defined by groove-shaped recess 52 in the arbitrary section taken along direction FW in which the pair of lateral sides 11 , 11 ′ are arranged.
- flat plate section 5 a has at least two protrusions 56 , 57 defined by stripe-shaped protrusion 54 , 55 in the arbitrary section taken along direction FW in which lateral sides 11 , 11 ′ are arranged.
- corrugated fin 5 D of the fifth embodiment has, on a surface of its flat plate section 5 a , the plurality of groove-shaped recesses 58 regularly spaced at predetermined pitch Pi along direction FW in which a pair of lateral sides 11 , 11 ′ are arranged.
- Each groove-shaped recess 58 is formed of first groove-shaped recess 58 a , second groove-shaped recess 58 b , third groove-shaped recess 58 c and fourth groove-shaped recess 58 d , and in the plan view with lateral side 11 ′ of flat plate section 5 a being above the other lateral side 11 , those first through fourth groove-shaped recesses 58 a , 58 b , 58 c , 58 d connect in an M shape.
- first groove-shaped recess 58 a extends linearly in a direction from end side 12 ′ toward end side 12 while slanting in a direction from lateral side 11 ′ toward lateral side 11 .
- second groove-shaped recess 58 b extends linearly in a direction from end side 12 toward end side 12 ′ while slanting in the direction from lateral side 11 ′ toward lateral side 11 .
- third groove-shaped recess 58 c extends linearly in the direction from end side 12 ′ toward end side 12 while slanting in the direction from lateral side 11 ′ toward lateral side 11 .
- fourth groove-shaped recess 58 d extends linearly in the direction from end side 12 toward end side 12 ′ while slanting in the direction from lateral side 11 ′ toward lateral side 11 .
- flat plate section 5 a has at least two recesses 59 defined by groove-shaped recesses 58 in the arbitrary section taken along direction FD in which the pair of end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has at least two protrusions 62 , 63 defined by stripe-shaped protrusions 60 , 61 in the arbitrary section taken along direction FD in which end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has the plurality of recesses 59 defined by the respective plurality of groove-shaped recesses 58 in the arbitrary section taken along direction FW in which the pair of lateral sides 11 , 11 ′ are arranged.
- flat plate section 5 a has the plurality of protrusions 62 , 63 defined by the respective plurality of stripe-shaped protrusions 60 , 61 in the arbitrary section taken along direction FW in which lateral sides 11 , 11 ′ are arranged.
- corrugated fin 5 E of the sixth embodiment has, on a surface of its flat plate section 5 a , the plurality of first groove-shaped recesses 64 and the plurality of second groove-shaped recesses 65 that are regularly spaced at predetermined pitch Pj along direction FD in which a pair of end sides 12 , 12 ′ are arranged.
- Each first groove-shaped recess 64 extends linearly in a direction from end side 12 toward end side 12 ′ while slanting in a direction from lateral side 11 toward lateral side 11 ′.
- Each second groove-shaped recess 65 extends linearly in the direction from end side 12 toward end side 12 ′ while slanting in a direction from lateral side 11 ′ toward lateral side 11 .
- First groove-shaped recesses 64 cross second groove-shaped recesses 65 , thus forming a mesh-like pattern as a whole.
- flat plate section 5 a has the plurality of recesses 66 defined by the plurality of groove-shaped recesses 64 , 65 in the arbitrary section taken along direction FD in which the pair of end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has the plurality of protrusions 69 , 70 defined by a plurality of stripe-shaped protrusions 67 , 68 in the arbitrary section taken along direction FD in which end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has the plurality of recesses 66 defined by the plurality of groove-shaped recesses 64 , 65 in the arbitrary section taken along direction FW in which the pair of lateral sides 11 , 11 ′ are arranged.
- flat plate section 5 a has the plurality of protrusions 69 , 70 defined by the plurality of striped-shaped protrusions 67 , 68 in the arbitrary section taken along direction FW in which lateral sides 11 , 11 ′ are arranged.
- corrugated fin 5 F of the seventh embodiment has first groove-shaped recess 71 and second groove-shaped recess 72 on a surface of its flat plate section 5 a.
- First groove-shaped recess 71 extends linearly between a corner where lateral side 11 and end side 12 ′ meet and a corner where lateral side 11 ′ and end side 12 meet.
- Second groove-shaped recess 72 extends linearly between a corner where lateral side 11 and end side 12 meet and a corner where lateral side 11 ′ and end side 12 ′ meet.
- First groove-shaped recess 71 and second groove-shaped recess 72 cross each other, thus forming an X shape.
- flat plate section 5 a has recesses 73 , 74 defined by groove-shaped recesses 71 , 72 in the arbitrary sections taken along direction FD in which the pair of end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has protrusions 77 , 78 defined by stripe-shaped protrusions 75 , 76 in the arbitrary sections taken along direction FD in which end sides 12 , 12 ′ are arranged. It is to be noted that there exists, as shown in FIG.
- flat plate section 5 a has recesses 73 , 74 defined by groove-shaped recesses 71 , 72 in the arbitrary sections taken along direction FW in which the pair of lateral sides 11 , 11 ′ are arranged.
- flat plate section 5 a has protrusions 77 , 78 defined by stripe-shaped protrusions 75 , 76 in the arbitrary sections taken along direction FW in which lateral sides 11 , 11 ′ are arranged. It is to be noted that there exists, as shown in FIG.
- corrugated fin 5 G of the eighth embodiment has, on a surface of its flat plate section 5 a , the plurality of hemispheric recesses 79 in a staggered arrangement in direction FW in which a pair of lateral sides 11 , 11 ′ are arranged as well as in direction FD in which a pair of end sides 12 , 12 ′ are arranged.
- Pitch Pk for arranging hemispheric recesses 79 , a diameter of each hemispheric recess 79 and others are determined so that hemispheric recesses 79 adjacent in direction FD in which end sides 12 , 12 ′ are arranged partly overlap each other when viewed in direction FW in which lateral sides 11 , 11 ′ are arranged.
- Pitch Pm for arranging hemispheric recesses 79 the diameter of each hemispheric recess 79 and others are determined so that hemispheric recesses 79 adjacent in direction FW in which lateral sides 11 , 11 ′ are arranged partly overlap each other when viewed in direction FD in which end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has the plurality of recesses 80 defined by the respective plurality of hemispheric recesses 79 in the arbitrary section taken along direction FD in which the pair of end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has the plurality of protrusions 82 defined by a respective plurality of hemispheric protrusions 81 in the arbitrary section taken along direction FD in which end sides 12 , 12 ′ are arranged.
- flat plate section 5 a has the plurality of recesses 80 defined by the respective plurality of hemispheric recesses 79 in the arbitrary section taken along direction FW in which the pair of lateral sides 11 , 11 ′ are arranged.
- flat plate section 5 a has the plurality of protrusions 82 defined by the respective plurality of hemispheric protrusions 81 in the arbitrary section taken along direction FW in which lateral sides 11 , 11 ′ are arranged.
- flat plate section 5 a is provided with at least one recess 41 , 47 , 53 , 59 , 66 , 73 or 74 defined by groove-shaped recess 40 , 46 , 52 , 58 , 64 , 65 , 71 or 72 or at least one protrusion 44 , 45 , 50 , 51 , 56 , 57 , 62 , 63 , 69 , 70 , 77 or 78 defined by stripe-shaped protrusion 42 , 43 , 48 , 49 , 54 , 55 , 60 , 61 , 67 , 68 , 75 or 76 , or at least one recess 80 defined by hemispheric recess 79 or at least one protrusion 82 defined by hemispheric protrusion 81 in the arbitrary section taken along each of the two directions,
- corrugated fins 5 A to 5 G of the second through eighth embodiments can provide the same effects as corrugated fin 5 of the first embodiment.
- radiators including such respective corrugated fins 5 A to 5 G have increased product accuracy, thus facilitating their production.
- a corrugated fin and a heat exchanger including the corrugated fin according to the present invention have the characteristic of being capable of reliably preventing bending at an unexpected place during production, thereby improving product accuracy and facilitating the production, and therefore, are suitable for use in and as a radiator, an oil cooler, an after-cooler or the like.
Abstract
A corrugated fin has flat plate sections each having a pair of lateral sides facing each other and a pair of end sides facing each other, and joining sections connecting with lateral sides of the flat plate sections. The flat plate sections and joining sections are alternately formed into a corrugated shape by bending. The joining section has an even surface joined to a tube through which a heat exchange medium flows, while the flat plate section includes a recess or protrusions in arbitrary sections taken along two directions including a direction in which the lateral sides are arranged and a direction in which the end sides are arranged, respectively.
Description
- The present application is a U.S. Continuation application of U.S. application Ser. No. 13/580,342, filed Aug. 21, 2012, which is a U.S. National Phase application of International Application No. PCT/JP2011/053840, filed Feb. 22, 2011, which claims priority from Japanese Application No. 2010-040282, filed Feb. 25, 2010, all of which are incorporated herein by reference.
- The present invention relates to a corrugated fin for dissipating heat of a heat exchange medium in a heat exchanger such as a radiator, an oil cooler or an after-cooler. The invention also relates to the heat exchanger including the corrugated fin.
- In an engine room of a work vehicle such as a hydraulic excavator or a bulldozer, an engine, a radiator, a cooling fan and others are placed in a predetermined pattern of locations. When driven, the cooling fan causes a flow of cooling air which passes through the radiator, thereby cooling engine cooling water circulating between the engine and the radiator.
- The radiator is constructed mainly of a top tank, a bottom tank, a plurality of tubes and fins.
- The top tank and the bottom tank are coupled through the plurality of tubes arranged at predetermined intervals. Thus, the engine cooling water coming from the engine is once stored in the top tank, then passes through the plurality of tubes to be stored in the bottom tank, and is then returned to the engine.
- The fins are each disposed between the adjacent tubes and joined to the tubes by joining means such as brazing.
- As an example of the above-described fin, there is a corrugated fin having flat plate sections and joining sections that are alternately formed into a corrugated shape by bending (refer to, for example,
patent documents -
- Patent Document 1: Japanese Patent Unexamined Publication No. 2007-232246
- Patent Document 2: Japanese Patent Unexamined Publication No. 2002-228379
- Patent Document 3: Japanese Patent Unexamined Publication No. H09-155487
- The corrugated fin is manufactured, for example, by undergoing a grooving process and a corrugating process.
- The grooving process is a process of forming a plurality of grooves on a surface of a bandlike sheet by passing the bandlike sheet uncoiled from a sheet coil between a pair of grooving rollers or by press working using a press machine.
- In the corrugating process, the bandlike sheet which has undergone the grooving process is passed through a pair of corrugating rollers for bending, whereby the flat plate sections and the joining sections form a corrugated shape in an alternating sequence.
- Examples of the grooves formed in the bandlike sheet in the grooving process include grooves extending in a direction in which the pair of lateral sides of the flat plate section are arranged and grooves extending in a direction in which the pair of end sides of the flat plate section are arranged.
- Providing the flat plate section with the grooves extending in the direction in which the pair of lateral sides are arranged can increase a section modulus of a section taken along the direction in which the pair of end sides are arranged. Accordingly, the flat plate section can have increased rigidity with respect to such a bending action as to bring the pair of lateral sides close to each other. However, in this case, a section taken along the direction in which the pair of lateral sides are arranged cannot have an increased section modulus, so that the flat plate section cannot have increased rigidity with respect to such a bending action as to bring the pair of end sides close to each other.
- Providing the flat plate section with the grooves extending in the direction in which the pair of end sides are arranged can increase a section modulus of a section taken along the direction in which the pair of lateral sides are arranged. Accordingly, the flat plate section can have increased rigidity with respect to such the bending action as to bring the pair of end sides close to each other. However, in this case, a section taken along the direction in which the pair of end sides are arranged cannot have an increased section modulus, so that the flat plate section cannot have increased rigidity with respect to such the bending action as to bring the pair of lateral sides close to each other.
- Therefore, during the production of the conventional corrugated fins or, more specifically, in the corrugating process, bending can possibly occur at an unexpected place, thereby problematically increasing a dimensional error.
- For this reason, the dimensional errors of the corrugated fins accumulate when a radiator core is assembled by alternately stacking the corrugated fins and the tubes, which in turn may warp the radiator core, leaving a problem that product accuracy is difficult to improve. Correcting the dimensional error of the corrugated fin requires extra time and effort, while assembling such that the dimensional errors of the corrugated fins offset one another requires a high skill. In any case, the production problematically becomes difficult.
- In view of the problems mentioned above, the present invention aims to provide a corrugated fin capable of reliably preventing bending at an unexpected place during production, thereby improving product accuracy and facilitating the production. The invention also aims to provide a heat exchanger including this corrugated fin.
- To achieve the above object, a corrugated fin for a heat exchanger according to a first aspect of the present invention comprises a flat plate section and a joining section which are alternately formed into a corrugated shape by bending, said flat plate section having a pair of lateral sides facing each other and a pair of end sides facing each other, said joining section connecting with a lateral side of the pair of lateral sides of the flat plate section,
- wherein said joining section has an even surface joined to a tube through which a heat exchange medium is circulated and
- wherein said flat plate section has at least one recess or protrusion in an arbitrary section taken in two directions, the two directions being a direction in which the pair of lateral sides are arranged and a direction in which the pair of end sides are arranged.
- According to a second aspect of the invention that is based on the first aspect, it is preferable that the even surface of the joining section is formed into a plane surface.
- According to a third aspect of the invention that is based on the first aspect, it is preferable that the even surface of the joining section is formed into a curved surface.
- According to a fourth aspect of the invention that is based on the first, second or third aspect, it is preferable that two or more recesses or protrusions are provided.
- A heat exchanger according to a fifth aspect of the invention includes the corrugated fin of the first, second, third or fourth aspect.
- In the corrugated fin of the first aspect of the invention, the flat plate section is provided with at least one recess or protrusion in the arbitrary section taken in the two directions, that is, the direction in which the pair of lateral sides are arranged and the direction in which the pair of end sides are arranged. Accordingly, the section taken along the direction in which the pair of end sides are arranged and the section taken along the direction in which the pair of lateral sides are arranged can have increased section moduli, respectively. For this reason, the flat plate section can have increased rigidity with respect to such a bending action as to bring the pair of lateral sides close to each other as well as with respect to such a bending action as to bring the pair of end sides close to each other.
- The joining section is not provided with any recess or protrusion such as provided in the flat plate section. This allows a large difference in rigidity between the flat plate section and the joining section, thus enabling easy and reliable bending at a boundary between the flat plate section and the joining section.
- In the corrugated fin of the first aspect of the invention, bending at an unexpected place can be prevented without fail during production of the corrugated fin, whereby the corrugated fin can have a reduced dimensional error.
- Adopting the structure of the second aspect of the invention can increase an area joined to the tube and a thermal contact area, thus allowing stronger joining between the corrugated fin and the tube and enhancing a heat dissipation effect of the corrugated fin.
- Adopting the structure of the third aspect of the invention can avoid stress concentration on a bent part.
- Adopting the structure of the fourth aspect of the invention can further increase the rigidity of the flat plate section without fail and allows easier and more reliable bending at the boundary between the flat plate section and the joining section.
- The heat exchanger of the fifth aspect of the invention has increased product accuracy and is thus easy to produce.
-
FIG. 1 is a general perspective view of a radiator in accordance with a first exemplary embodiment of the present invention. -
FIG. 2 is an enlarged perspective view of part X inFIG. 1 . -
FIG. 3 (a) illustrates the structure of a flat plate section viewed from the direction of arrow Y inFIG. 2 , andFIGS. 3 (b) , 3 (c) and 3 (d) are sectional views taken along respective lines A-A, B-B, B′-B′ inFIG. 3 (a) . -
FIG. 4 is an enlarged view of an essential part viewed from the direction of arrow Z inFIG. 2 . -
FIG. 5 (a) illustrates a method of manufacturing a corrugated fin,FIG. 5 (b) is a state view before corrugation,FIG. 5 (c) is a state view after the corrugation, and FIGS. 5 (d) and 5 (e) illustrate respective shapes of an even surface, withFIG. 5 (d) illustrating a plane surface andFIG. 5 (e) illustrating a curved surface. -
FIGS. 6 (a) to 6 (f) illustrate variations of the corrugated fin in accordance with the first embodiment. -
FIG. 7 (a) illustrates the structure of a flat plate section of a corrugated fin in accordance with a second exemplary embodiment, andFIGS. 7 (b) , 7 (c) and 7 (d) are sectional views taken along respective lines C-C, D-D, D′-D′ inFIG. 7 (a) . -
FIG. 8 (a) illustrates the structure of a flat plate section of a corrugated fin in accordance with a third exemplary embodiment, andFIGS. 8 (b) , 8 (c) and 8 (d) are sectional views taken along respective lines E-E, F-F, F′-F′ inFIG. 8 (a) . -
FIG. 9 (a) illustrates the structure of a flat plate section of a corrugated fin in accordance with a fourth exemplary embodiment, andFIGS. 9 (b) and 9 (c) are sectional views taken along respective lines G-G, H-H inFIG. 9 (a) . -
FIG. 10 (a) illustrates the structure of a flat plate section of a corrugated fin in accordance with a fifth exemplary embodiment, andFIGS. 10 (b) and 10 (c) are sectional views taken along respective lines I-I, J-J inFIG. 10(a) . -
FIG. 11 (a) illustrates the structure of a flat plate section of a corrugated fin in accordance with a sixth exemplary embodiment, andFIGS. 11 (b) and 11 (c) are sectional views taken along respective lines K-K, L-L inFIG. 11 (a) . -
FIG. 12 (a) illustrates the structure of a flat plate section of a corrugated fin in accordance with a seventh exemplary embodiment, andFIGS. 12 (b) , 12 (c), 12 (d) and 12 (e) are sectional views taken along respective lines M-M, M′-M′, N-N, N′-N′ inFIG. 12 (a) . -
FIG. 13 (a) illustrates the structure of a flat plate section of a corrugated fin in accordance with an eighth exemplary embodiment, andFIGS. 13 (b) and 13 (c) are sectional views taken along respective lines Q-Q, R-R inFIG. 13 (a) . - Concrete exemplary embodiments of a corrugated fin and a heat exchanger including the corrugated fin according to the present invention are demonstrated hereinafter with reference to the accompanying drawings. The following description is provided of an example in which the invention is applied to a radiator installed in an engine room of a work vehicle such as a hydraulic excavator or a bulldozer. However, it goes without saying that the invention is applicable to heat exchangers having the same basic structure as the radiator, such as an oil cooler and an after-cooler.
-
FIG. 1 is a general perspective view of a radiator including a corrugated fin in accordance with the first exemplary embodiment of the invention. - (Description of a Schematic Structure of the Radiator)
-
Radiator 1 shown inFIG. 1 is a device for dissipating heat that engine cooling water (a heat exchange medium) circulating betweenradiator 1 and an engine (not shown) obtains from the engine. - This
radiator 1 is constructed mainly oftop tank 2,bottom tank 3,tubes 4 andcorrugated fins 5. -
Top tank 2 andbottom tank 3 are coupled through the plurality oftubes 4, thus allowing the engine cooling water coming from the engine to be once stored intop tank 2, then pass through the plurality oftubes 4 to be stored inbottom tank 3 and be returned to the engine thereafter. -
Tubes 4 andcorrugated fins 5 are alternately stacked to formradiator core 6. - (Description of the Tubes)
- As shown in
FIG. 2 ,tubes 4 are each formed of a flattened tube member havinginternal passage 4 a for the engine cooling water. - The plurality of
tubes 4 are arranged at predetermined pitch Pa along width direction RW ofradiator 1 and at predetermined spacing S along depth direction RD ofradiator 1. - (Brief Description of the Corrugated Fin)
-
Corrugated fin 5 is disposed betweentubes 4 which are adjacent in width direction RW ofradiator 1.Corrugated fin 5 hasflat plate sections 5 a and joiningsections 5 b that are alternately formed into a corrugated shape by bending. - (Brief Description of the Flat Plate Section)
- Each
flat plate section 5 a is a rectangular plate section having a pair oflateral sides radiator 1 and a pair of end sides 12, 12′ facing each other in depth direction RD ofradiator 1. - (Description of Groove-Shaped Recesses of the Flat Plate Section)
- As shown in
FIG. 3 (a) ,flat plate section 5 a is provided with, on its surface, the plurality of groove-shapedrecesses 13 regularly spaced at predetermined pitch Pb along direction FD in which the pair of end sides 12, 12′ are arranged. - Groove-shaped
recesses 13 extend linearly in a direction fromend side 12 towardend side 12′ while slanting in a direction fromlateral side 11 towardlateral side 11′. - Pitch Pb for arranging groove-shaped
recesses 13, an angle of inclination, length and width of each groove-shapedrecess 13 and others are determined so that adjacent groove-shapedrecesses 13 partly overlap each other when viewed in direction FW in which the pair oflateral sides - Providing the plurality of groove-shaped
recesses 13 on the surface offlat plate section 5 a causes a part between adjacent groove-shapedrecesses 13 to become relatively stripe-shapedprotrusion 14. In addition, providing groove-shapedrecesses 13 on the surface offlat plate section 5 a results in formation of corresponding stripe-shaped protrusions 15 (seeFIGS. 3 (b) and 3 (c)) on a back surface offlat plate section 5 a. - (Description of Recesses and Protrusions of the Flat Plate Section in Arbitrary Sections)
- As shown in
FIG. 3 (b) ,flat plate section 5 a has the plurality ofrecesses 16 defined by the respective plurality of groove-shapedrecesses 13 in the arbitrary section taken along direction FD in which the pair of end sides 12, 12′ are arranged. In other words,flat plate section 5 a has the plurality ofprotrusions protrusions - As shown in
FIGS. 3 (c) and 3 (d),flat plate section 5 a has recesses 16 defined by respective groove-shapedrecesses 13 in the arbitrary sections taken along direction FW in which the pair oflateral sides flat plate section 5 a has protrusions 17, 18 defined by respective stripe-shapedprotrusions FIG. 3 (c) , onerecess 16 defined by groove-shapedrecess 13 or oneprotrusion 18 defined by stripe-shapedprotrusion 15 in the section offlat plate section 5 a that is taken along line B-B, while there exists, as shown inFIG. 3 (d) , tworecesses 16 defined by respective groove-shapedrecesses 13 or twoprotrusions 18 defined by respective stripe-shapedprotrusions 15 in the section taken along line B′-B′. - (Brief Description of the Joining Section)
- As shown in
FIG. 4 , joiningsection 5 b is a rectangular plate section which makes a right angle withflat plate section 5 a, is narrower thanflat plate section 5 a and has evensurface 20 joined totube 4. Even surface 20 is a plane surface parallel to surface 21 oftube 4. - Conceptually, this even surface 20 has two implications, one of which is that
surface 20 is a completely even surface free of undulation and the other of which is thatsurface 20 is a substantially even surface having, compared with groove-shapedrecesses 13, extremely negligible shallow grooves (grooved remnants) which are formed inevitably when a grooving process is carried out to form groove-shapedrecesses 13 inflat plate section 5 a. - (Description of Joining Between the Corrugated Fin and the Tube)
-
Corrugated fin 5 andtube 4 are joined together by brazing usingbrazing filler metal 22 interposed between even surface 20 of joiningsection 5 b andsurface 21 oftube 4. - Because of being plane, even surface 20 of joining
section 5 b can have a larger area joined totube 4 and a larger thermal contact area compared to cases where even surface 20 is a curved surface or an angular surface. - Obtaining the larger joining area between even surface 20 of joining
section 5 b andsurface 21 oftube 4 enables stronger joining betweencorrugated fin 5 andtube 4. - Obtaining the larger thermal contact area between even surface 20 of joining
section 5 b andsurface 21 oftube 4 enables efficient conduction of the heat of the engine cooling water, which flows throughtube 4, fromtube 4 tocorrugated fin 5, thereby enhancing a heat dissipation effect ofcorrugated fin 5. - (Description of a Method of Manufacturing the Corrugated Fin)
- A description is provided next of the method of manufacturing
corrugated fin 5 with reference toFIG. 5 (a) . - The manufacturing method of
corrugated fin 5 includes the grooving process and a corrugating process. - (Description of the Grooving Process)
- The grooving process is a process of forming the plurality of groove-shaped
recesses 13 on a surface ofbandlike sheet 30 a, a corrugated fin material, by passingbandlike sheet 30 a uncoiled fromsheet coil 30 between a pair offirst rollers - The pair of
first rollers recesses 13 to be formed inbandlike sheet 30 a. Asfirst rollers bandlike sheet 30 a is sandwiched between theserollers recesses 13 are formed on the surface ofbandlike sheet 30 a as a result ofbandlike sheet 30 a being sandwiched between the recesses offirst roller 31 on one side and the protrusions offirst roller 31′ on the other side. - It is to be noted that similar groove-shaped
recesses 13 can be formed on the surface ofbandlike sheet 30 a by press working using a press machine. - (Description of the Corrugating Process)
- The corrugating process is a bending process in which bandlike
sheet 30 a coming out from between the pair offirst rollers second rollers first rollers flat plate sections 5 a and joiningsections 5 b form the corrugated shape in an alternating sequence. - The pair of
second rollers bandlike sheet 30 a, which has groove-shapedrecesses 13 formed on its surface, into the corrugated shape. The teeth ofroller 32 and the teeth ofroller 32′ are formed to mesh together. Assecond rollers bandlike sheet 30 a is sandwiched between theserollers bandlike sheet 30 a is bent into the corrugated shape as a result of being sandwiched between a space between the teeth ofsecond roller 32 and the tooth ofsecond roller 32′. - As shown in
FIG. 5 (b) ,bandlike sheet 30 a which will undergo the corrugation has sections (indicated by arrows T in the drawing) free of groove-shapedrecesses 13 and stripe-shapedprotrusions 14 resulting from groove-shapedrecesses 13. The corrugation is carried out so that these sections become joiningsections 5 b each having even surface 20 (seeFIG. 5 (c) ). - In this embodiment, even surface 20 is plane as shown in
FIG. 5 (d) . However, even surface 20 is not limited to this and may also be curved as shown inFIG. 5 (e) . Forming even surface 20 into the curved surface can avoid stress concentration on a bent part. -
Corrugated fin 5 which has undergone the corrugating process is thus sandwiched betweenadjacent tubes 4 and joined to thosetubes 4 by brazing. - (Description of Effects of the First Embodiment)
- In
corrugated fin 5 of the first embodiment,flat plate section 5 a is provided with, as shown inFIGS. 3 (b) and 3 (c), recesses 16 defined by groove-shapedrecesses 13 orprotrusions protrusions lateral sides flat plate section 5 a can have increased rigidity with respect to such a bending action as to bringlateral sides end sides - Joining
section 5 b is not provided withrecess 16 defined by groove-shapedrecess 13 orprotrusions protrusions flat plate section 5 a. This allows a large difference in rigidity betweenflat plate section 5 a and joiningsection 5 b, thus enabling easy and reliable bending at a boundary betweenflat plate section 5 a and joiningsection 5 b. - Consequently, bending at an unexpected place can be prevented without fail during the production of
corrugated fin 5 or, more specifically, in the corrugating process, thus reducing a dimensional error ofcorrugated fin 5. -
Radiator core 6 ofradiator 1 of the first embodiment is assembled by alternately stackingtubes 4 andcorrugated fins 5. Because the dimensional error of eachcorrugated fin 5 can be reduced,radiator core 6 does not warp, thereby increasing product accuracy. Moreover, no correction of the dimensional error ofcorrugated fin 5 and no high skill for offsetting the dimensional errors against one another are required, thus facilitating the production. - (Description of Variations of the First Embodiment)
-
FIGS. 6 (a) to 6 (f) are plan views of respectiveflat plate sections 5 a, illustrating the variations ofcorrugated fin 5 of the first embodiment. -
Corrugated fin 5 of the first embodiment has, at itsflat plate section 5 a, at least onerecess 16 defined by groove-shapedrecess 13 in the arbitrary section taken along each of the two directions, that is, direction FW in which the pair oflateral sides - For example, groove-shaped
recess 13 can be replaced by groove-shapedrecess 13A having a greater groove width thanrecess 13 as shown inFIG. 6 (a) . - As shown in
FIG. 6 (b) , pitch Pb at which groove-shapedrecesses 13 are arranged can be changed to smaller pitch Pc. - As shown in
FIG. 6 (c) , groove-shapedrecesses 13 can be arranged at at least two different pitches Pd, Pe. - As shown in
FIG. 6 (d) , groove-shapedrecesses - As shown in
FIG. 6 (e) , a plurality of groove-shapedrecesses 13B shorter in length than groove-shapedrecesses 13 are arranged alternately as equivalents ofrecesses 13. - While groove-shaped
recesses 13 extend linearly in the direction fromend side 12 offlat plate section 5 atoward end side 12′, slanting in the direction fromlateral side 11 towardlateral side 11′, groove-shaped recesses 13C shown inFIG. 6 (f) can be adopted instead. These recesses 13C extend linearly in the direction fromend side 12 offlat plate section 5 atoward end side 12′ while slanting in an opposite direction, that is, fromlateral side 11′ towardlateral side 11. - Hereinafter, descriptions of corrugated fins 5A to 5G in accordance with the respective second through eighth exemplary embodiments of the present invention are provided one by one. In the following embodiments, elements similar to those in the first embodiment have the same reference marks in drawings, the detailed descriptions of those elements are omitted, and emphasis is placed on different features not seen in the first embodiment.
- (Description of Groove-Shaped Recesses of a Flat Plate Section Shown in
FIG. 7 (a) in Accordance with the Second Embodiment) - As shown in
FIG. 7 (a) , corrugated fin 5A of the second embodiment has, on a surface of itsflat plate section 5 a, the plurality of groove-shapedrecesses 40 regularly spaced at predetermined pitch Pf along direction FD in which a pair of end sides 12, 12′ are arranged. - Each groove-shaped
recess 40 is formed of first groove-shapedrecess 40 a and second groove-shapedrecess 40 b, and in the plan view withend side 12′ offlat plate section 5 a being above theother end side 12, first and second groove-shapedrecesses - Starting from a middle point of direction FW in which a pair of
lateral sides flat plate section 5 a are arranged, first groove-shapedrecess 40 a extends linearly in a direction fromend side 12 towardend side 12′ while slanting in a direction fromlateral side 11 towardlateral side 11′. - Starting from the middle point of direction FW in which lateral sides 11, 11′ of
flat plate section 5 a are arranged, second groove-shapedrecess 40 b extends linearly in the direction fromend side 12 towardend side 12′ while slanting in a direction fromlateral side 11′ towardlateral side 11. - (Description of Recesses and Protrusions of the Flat Plate Section in Arbitrary Sections Shown in
FIGS. 7 (b) , 7 (c) and 7 (d) in Accordance with the Second Embodiment) - As shown in
FIG. 7 (b) ,flat plate section 5 a has the plurality ofrecesses 41 defined by the respective plurality of groove-shapedrecesses 40 in the arbitrary section taken along direction FD in which the pair of end sides 12, 12′ are arranged. In other words,flat plate section 5 a has the plurality ofprotrusions protrusions - As shown in
FIGS. 7 (c) and 7 (d),flat plate section 5 a has recesses 41 defined by groove-shapedrecesses 40 in the arbitrary sections taken along direction FW in which the pair oflateral sides flat plate section 5 a has protrusions 44, 45 defined by stripe-shapedprotrusions FIG. 7 (c) , onerecess 41 defined by groove-shapedrecess 40 or oneprotrusion 45 defined by stripe-shapedprotrusion 43 in the section offlat plate section 5 a that is taken along line D-D, while there exists, as shown inFIG. 7 (d), tworecesses 41 defined by groove-shapedrecess 40 or twoprotrusions 45 defined by stripe-shapedprotrusion 43 in the section taken along line D′-D′. - (Description of Groove-Shaped Recesses of a Flat Plate Section Shown in
FIG. 8 (a) in Accordance with the Third Embodiment) - As shown in
FIG. 8 (a) ,corrugated fin 5B of the third embodiment has, on a surface of itsflat plate section 5 a, the plurality of groove-shapedrecesses 46 regularly spaced at predetermined pitch Pg along direction FD in which a pair of end sides 12, 12′ are arranged. - Groove-shaped
recesses 46 are recesses each bent into an arc shape, bulging towardend side 12 betweenlateral sides - (Description of Recesses and Protrusions of the Flat Plate Section in Arbitrary Sections Shown in
FIGS. 8 (b) , 8 (c) and 8 (d) in Accordance with the Third Embodiment) - As shown in
FIG. 8 (b) ,flat plate section 5 a has the plurality ofrecesses 47 defined by the respective plurality of groove-shapedrecesses 46 in the arbitrary section taken along direction FD in which the pair of end sides 12, 12′ are arranged. In other words,flat plate section 5 a has the plurality ofprotrusions protrusions - As shown in
FIGS. 8 (c) and 8 (d),flat plate section 5 a has recesses 47 defined by groove-shapedrecesses 46 in the arbitrary sections taken along direction FW in which the pair oflateral sides flat plate section 5 a has protrusions 50, 51 defined by stripe-shapedprotrusions FIG. 8 (c) , onerecess 47 defined by groove-shapedrecess 46 or oneprotrusion 51 defined by stripe-shapedprotrusion 49 in the section offlat plate section 5 a that is taken along line F-F, while there exists, as shown inFIG. 8 (d), tworecesses 47 defined by groove-shapedrecess 46 or twoprotrusions 51 defined by stripe-shapedprotrusion 49 in the section taken along line F′-F′. - (Description of Groove-Shaped Recesses of a Flat Plate Section Shown in
FIG. 9 (a) in Accordance with the Fourth Embodiment) - As shown in
FIG. 9 (a) , corrugated fin 5C of the fourth embodiment has, on a surface of itsflat plate section 5 a, the plurality of groove-shapedrecesses 52 regularly spaced at predetermined pitch Ph along direction FD in which a pair of end sides 12, 12′ are arranged. - Each groove-shaped
recess 52 is formed of first groove-shapedrecess 52 a, second groove-shaped recess 52 b, third groove-shaped recess 52 c and fourth groove-shapedrecess 52 d, and in the plan view withend side 12′ offlat plate section 5 a being above theother end side 12, those first through fourth groove-shapedrecesses - Starting from a point located in the middle between
lateral side 11′ and a middle point of direction FW in which lateral sides 11, 11′ offlat plate section 5 a are arranged, first groove-shapedrecess 52 a extends linearly in a direction fromend side 12 towardend side 12′ while slanting in a direction fromlateral side 11 towardlateral side 11′. - Starting from the point located in the middle between
lateral side 11′ and the middle point of direction FW in which lateral sides 11, 11′ offlat plate section 5 a are arranged, second groove-shaped recess 52 b extends linearly in the direction fromend side 12 towardend side 12′ while slanting in a direction fromlateral side 11′ towardlateral side 11. - Starting from a point located in the middle between
lateral side 11 and the middle point of direction FW in which lateral sides 11, 11′ offlat plate section 5 a are arranged, third groove-shaped recess 52 c extends linearly in the direction fromend side 12 towardend side 12′ while slanting in the direction fromlateral side 11 towardlateral side 11′. - Starting from the point located in the middle between
lateral side 11 and the middle point of direction FW in which lateral sides 11, 11′ offlat plate section 5 a are arranged, fourth groove-shapedrecess 52 d extends linearly in the direction fromend side 12 towardend side 12′ while slanting in the direction fromlateral side 11′ towardlateral side 11. - (Description of Recesses and Protrusions of the Flat Plate Section in Arbitrary Sections Shown in
FIGS. 9 (b) and 9 (c) in Accordance with the Fourth Embodiment) - As shown in
FIG. 9 (b) ,flat plate section 5 a has the plurality ofrecesses 53 defined by the respective plurality of groove-shapedrecesses 52 in the arbitrary section taken along direction FD in which the pair of end sides 12, 12′ are arranged. In other words,flat plate section 5 a has the plurality ofprotrusions protrusions - As shown in
FIG. 9 (c) ,flat plate section 5 a has at least tworecesses 53 defined by groove-shapedrecess 52 in the arbitrary section taken along direction FW in which the pair oflateral sides flat plate section 5 a has at least twoprotrusions protrusion - (Description of Groove-Shaped Recesses of a Flat Plate Section Shown in
FIG. 10 (a) in Accordance with the Fifth Embodiment) - As shown in
FIG. 10 (a) , corrugated fin 5D of the fifth embodiment has, on a surface of itsflat plate section 5 a, the plurality of groove-shapedrecesses 58 regularly spaced at predetermined pitch Pi along direction FW in which a pair oflateral sides - Each groove-shaped
recess 58 is formed of first groove-shapedrecess 58 a, second groove-shapedrecess 58 b, third groove-shapedrecess 58 c and fourth groove-shapedrecess 58 d, and in the plan view withlateral side 11′ offlat plate section 5 a being above the otherlateral side 11, those first through fourth groove-shapedrecesses - Starting from a point located in the middle between
end side 12 and a middle point of direction FD in which a pair of end sides 12, 12′ offlat plate section 5 a are arranged, first groove-shapedrecess 58 a extends linearly in a direction fromend side 12′ towardend side 12 while slanting in a direction fromlateral side 11′ towardlateral side 11. - Starting from the point located in the middle between
end side 12 and the middle point of direction FD in which end sides 12, 12′ offlat plate section 5 a are arranged, second groove-shapedrecess 58 b extends linearly in a direction fromend side 12 towardend side 12′ while slanting in the direction fromlateral side 11′ towardlateral side 11. - Starting from a point located in the middle between
end side 12′ and the middle point of direction FD in which lateral sides 12, 12′ offlat plate section 5 a are arranged, third groove-shapedrecess 58 c extends linearly in the direction fromend side 12′ towardend side 12 while slanting in the direction fromlateral side 11′ towardlateral side 11. - Starting from the point located in the middle between
end side 12′ and the middle point of direction FD in which lateral sides 12, 12′ offlat plate section 5 a are arranged, fourth groove-shapedrecess 58 d extends linearly in the direction fromend side 12 towardend side 12′ while slanting in the direction fromlateral side 11′ towardlateral side 11. - (Description of Recesses and Protrusions of the Flat Plate Section in Arbitrary Sections Shown in
FIGS. 10 (b) and 10 (c) in Accordance with the Fifth Embodiment) - As shown in
FIG. 10 (b) ,flat plate section 5 a has at least tworecesses 59 defined by groove-shapedrecesses 58 in the arbitrary section taken along direction FD in which the pair of end sides 12, 12′ are arranged. In other words,flat plate section 5 a has at least twoprotrusions protrusions - As shown in
FIG. 10 (c) ,flat plate section 5 a has the plurality ofrecesses 59 defined by the respective plurality of groove-shapedrecesses 58 in the arbitrary section taken along direction FW in which the pair oflateral sides flat plate section 5 a has the plurality ofprotrusions protrusions - (Description of Groove-Shaped Recesses of a Flat Plate Section Shown in
FIG. 11 (a) in Accordance with the Sixth Embodiment) - As shown in
FIG. 11 (a) , corrugated fin 5E of the sixth embodiment has, on a surface of itsflat plate section 5 a, the plurality of first groove-shapedrecesses 64 and the plurality of second groove-shapedrecesses 65 that are regularly spaced at predetermined pitch Pj along direction FD in which a pair of end sides 12, 12′ are arranged. - Each first groove-shaped
recess 64 extends linearly in a direction fromend side 12 towardend side 12′ while slanting in a direction fromlateral side 11 towardlateral side 11′. - Each second groove-shaped
recess 65 extends linearly in the direction fromend side 12 towardend side 12′ while slanting in a direction fromlateral side 11′ towardlateral side 11. - First groove-shaped
recesses 64 cross second groove-shapedrecesses 65, thus forming a mesh-like pattern as a whole. - (Description of Recesses and Protrusions of the Flat Plate Section in Arbitrary Sections Shown in
FIGS. 11 (b) and 11 (c) in Accordance with the Sixth Embodiment) - As shown in
FIG. 11 (b) ,flat plate section 5 a has the plurality ofrecesses 66 defined by the plurality of groove-shapedrecesses flat plate section 5 a has the plurality ofprotrusions protrusions - As shown in
FIG. 11 (c) ,flat plate section 5 a has the plurality ofrecesses 66 defined by the plurality of groove-shapedrecesses lateral sides flat plate section 5 a has the plurality ofprotrusions protrusions - (Description of Groove-Shaped Recesses of a Flat Plate Section Shown in
FIG. 12 (a) in Accordance with the Seventh Embodiment) - As shown in
FIG. 12 (a) , corrugated fin 5F of the seventh embodiment has first groove-shapedrecess 71 and second groove-shapedrecess 72 on a surface of itsflat plate section 5 a. - First groove-shaped
recess 71 extends linearly between a corner wherelateral side 11 andend side 12′ meet and a corner wherelateral side 11′ and endside 12 meet. - Second groove-shaped
recess 72 extends linearly between a corner wherelateral side 11 andend side 12 meet and a corner wherelateral side 11′ and endside 12′ meet. - First groove-shaped
recess 71 and second groove-shapedrecess 72 cross each other, thus forming an X shape. - (Description of Recesses and Protrusions of the Flat Plate Section in Arbitrary Sections Shown in
FIGS. 12 (b) , 12 (c), 12 (d) and 12 (e) in Accordance with the Seventh Embodiment) - As shown in
FIGS. 12 (b) and 12 (c),flat plate section 5 a has recesses 73, 74 defined by groove-shapedrecesses flat plate section 5 a has protrusions 77, 78 defined by stripe-shapedprotrusions FIG. 12 (b) , one recess 73 (74) defined by groove-shaped recess 71 (72) or one protrusion 77 (78) defined by stripe-shaped protrusion 75 (76) in the section offlat plate section 5 a that is taken along line M-M, while there exists, as shown inFIG. 12 (c) , two recesses 73 (74) defined by respective groove-shaped recesses 71 (72) or two protrusions 77 (78) defined by respective stripe-shaped protrusions 75 (76) in the section taken along line M′-M′. - As shown in
FIGS. 12 (d) and 12 (e),flat plate section 5 a has recesses 73, 74 defined by groove-shapedrecesses lateral sides flat plate section 5 a has protrusions 77, 78 defined by stripe-shapedprotrusions FIG. 12 (d) , one recess 73 (74) defined by groove-shaped recess 71 (72) or one protrusion 77 (78) defined by stripe-shaped protrusion 75 (76) in the section offlat plate section 5 a that is taken along line N-N, while there exists, as shown inFIG. 12 (e) , two recesses 73 (74) defined by respective groove-shaped recesses 71 (72) or two protrusions 77 (78) defined by respective stripe-shaped protrusions 75 (76) in the section taken along line N′-N′. - (Description of Hemispheric Recesses of a Flat Plate Section Shown in
FIG. 13 (a) in Accordance with the Eighth Embodiment) - As shown in
FIG. 13 (a) ,corrugated fin 5G of the eighth embodiment has, on a surface of itsflat plate section 5 a, the plurality ofhemispheric recesses 79 in a staggered arrangement in direction FW in which a pair oflateral sides - Pitch Pk for arranging
hemispheric recesses 79, a diameter of eachhemispheric recess 79 and others are determined so thathemispheric recesses 79 adjacent in direction FD in which end sides 12, 12′ are arranged partly overlap each other when viewed in direction FW in which lateral sides 11, 11′ are arranged. - Pitch Pm for arranging
hemispheric recesses 79, the diameter of eachhemispheric recess 79 and others are determined so thathemispheric recesses 79 adjacent in direction FW in which lateral sides 11, 11′ are arranged partly overlap each other when viewed in direction FD in which end sides 12, 12′ are arranged. - (Description of Recesses and Protrusions of the Flat Plate Section in Arbitrary Sections Shown in
FIGS. 13 (b) and 13 (c) in Accordance with the Eighth Embodiment) - As shown in
FIG. 13 (b) ,flat plate section 5 a has the plurality ofrecesses 80 defined by the respective plurality ofhemispheric recesses 79 in the arbitrary section taken along direction FD in which the pair of end sides 12, 12′ are arranged. In other words,flat plate section 5 a has the plurality ofprotrusions 82 defined by a respective plurality ofhemispheric protrusions 81 in the arbitrary section taken along direction FD in which end sides 12, 12′ are arranged. - As shown in
FIG. 13 (c) ,flat plate section 5 a has the plurality ofrecesses 80 defined by the respective plurality ofhemispheric recesses 79 in the arbitrary section taken along direction FW in which the pair oflateral sides flat plate section 5 a has the plurality ofprotrusions 82 defined by the respective plurality ofhemispheric protrusions 81 in the arbitrary section taken along direction FW in which lateral sides 11, 11′ are arranged. - (Description of Effects of the Second through Eighth Embodiments)
- Even in each of
corrugated fins flat plate section 5 a is provided with at least onerecess recess protrusion protrusion recess 80 defined byhemispheric recess 79 or at least oneprotrusion 82 defined byhemispheric protrusion 81 in the arbitrary section taken along each of the two directions, that is, direction FW in which the pair oflateral sides corrugated fin 5 of the first embodiment. Similarly toradiator 1 of the first embodiment, radiators including such respective corrugated fins 5A to 5G have increased product accuracy, thus facilitating their production. - The embodiments and variations of the corrugated fin and the heat exchanger including the corrugated fin according to the present invention have been described above. However, the present invention is not limited to the structures described in the above embodiments and variations and allows appropriate variations on each of the structures without departing from the spirit of the invention, such as, appropriately combining the structures of the above-described embodiments and variations.
- A corrugated fin and a heat exchanger including the corrugated fin according to the present invention have the characteristic of being capable of reliably preventing bending at an unexpected place during production, thereby improving product accuracy and facilitating the production, and therefore, are suitable for use in and as a radiator, an oil cooler, an after-cooler or the like.
-
-
- 1 radiator (heat exchanger)
- 4 tube
- 5, 5A, 5B, 5C, 5D, 5E, 5F, 5G corrugated fins
- 5 a flat plate section
- 5 b joining section
- 11, 11′ lateral sides
- 12, 12′ end sides
- 13 groove-shaped recess (first embodiment)
- 13A groove-shaped recess (variation of first embodiment)
- 13B groove-shaped recess (variation of first embodiment)
- 15 stripe-shaped protrusion (first embodiment)
- 16 recess (first embodiment)
- 17, 18 protrusions (first embodiment)
- 20 even surface
- 40 groove-shaped recess (second embodiment)
- 41 recess (second embodiment)
- 42, 43 stripe-shaped protrusions (second embodiment)
- 44, 45 protrusions (second embodiment)
- 46 groove-shaped recess (third embodiment)
- 47 recess (third embodiment)
- 49, 48 stripe-shaped protrusions (third embodiment)
- 50, 51 protrusions (third embodiment)
- 52 groove-shaped recess (fourth embodiment)
- 53 recess (fourth embodiment)
- 54, 55 stripe-shaped protrusions (fourth embodiment)
- 56, 57 protrusions (fourth embodiment)
- 58 groove-shaped recess (fifth embodiment)
- 59 recess (fifth embodiment)
- 60, 61 stripe-shaped protrusions (fifth embodiment)
- 62, 63 protrusions (fifth embodiment)
- 64, 65 groove-shaped recesses (sixth embodiment)
- 66 recess (sixth embodiment)
- 67, 68 stripe-shaped protrusions (sixth embodiment)
- 69, 70 protrusions (sixth embodiment)
- 71, 72 groove-shaped recesses (seventh embodiment)
- 73, 74 recesses (seventh embodiment)
- 75, 76 stripe-shaped protrusions (seventh embodiment)
- 77, 78 protrusions (seventh embodiment)
- 79 hemispheric recess (eighth embodiment)
- 80 recess (eighth embodiment)
- 81 hemispheric protrusion (eighth embodiment)
- 82 protrusion (eighth embodiment)
Claims (16)
1. A corrugated fin for a heat exchanger, the corrugated fin comprising:
a flat plate section and a joining section which are alternately formed into a corrugated shape by bending, said flat plate section having a pair of lateral sides facing each other and a pair of end sides facing each other, said joining section connecting with a lateral side of the pair of lateral sides of the flat plate section,
wherein said flat plate section has, on a surface thereof, a plurality of groove-shaped recesses that extend in a slant direction with respect to the pair of lateral sides of the flat plate section,
wherein each of the groove-shaped recesses comprises a first groove-shaped recess portion and a second groove-shaped recess portion which are separate from each other, and
wherein the first groove-shaped recess portion and the second groove-shaped recess portion are arranged alternately in a direction in which the lateral sides are arranged.
2. The corrugated fin of claim 1 , wherein:
the first groove-shaped recess portion extends linearly starting from a predetermined point between the pair of lateral sides in a slant direction from one lateral side toward the other lateral side, and
the second groove-shaped recess portion extends linearly starting from another predetermined point between the pair of lateral sides in a slant direction from the other lateral side toward the one lateral side.
3. The corrugated fin of claim 1 , wherein:
the joining section has an even surface joined to a tube through which a heat exchange medium is circulated, and
the even surface of the joining section is formed into a plane surface.
4. The corrugated fin of claim 2 , wherein:
the joining section has an even surface joined to a tube through which a heat exchange medium is circulated, and
the even surface of the joining section is formed into a plane surface.
5. The corrugated fin of claim 1 , wherein:
the joining section has an even surface joined to a tube through which a heat exchange medium is circulated, and
the even surface of the joining section is formed into a curved surface.
6. The corrugated fin of claim 2 , wherein:
the joining section has an even surface joined to a tube through which a heat exchange medium is circulated, and
the even surface of the joining section is formed into a curved surface.
7. A corrugated fin for a heat exchanger, the corrugated fin comprising:
a flat plate section and a joining section which are alternately formed into a corrugated shape by bending, said flat plate section having a pair of lateral sides facing each other and a pair of end sides facing each other, said joining section connecting with a lateral side of the pair of lateral sides of the flat plate section,
wherein said flat plate section has, on a surface thereof, a plurality of groove-shaped recesses that extend in a slant direction with respect to the pair of lateral sides of the flat plate section,
wherein each of the groove-shaped recesses comprises a first groove-shaped recess portion and a second groove-shaped recess portion which are separate from each other,
wherein the first groove-shaped recess portion extends linearly starting from a predetermined point between the pair of lateral sides in a slant direction from one lateral side toward the other lateral side, and
wherein the second groove-shaped recess portion extends linearly starting from another predetermined point between the pair of lateral sides in a slant direction from the other lateral side toward the one lateral side.
8. The corrugated fin of claim 7 , wherein:
the first groove-shaped recess portion extends linearly in a direction from one lateral side toward the other lateral side of the pair of lateral sides, slanting in a direction from one end side toward the other end side of the pair of end sides, and
the second groove-shaped recess portion extends linearly in a direction from one lateral side toward the other lateral side of the pair of lateral sides, slanting in a direction from one end side toward the other end side of the pair of end sides.
9. A heat exchanger comprising the corrugated fin according to claim 1 .
10. A heat exchanger comprising the corrugated fin according to claim 2 .
11. A heat exchanger comprising the corrugated fin according to claim 3 .
12. A heat exchanger comprising the corrugated fin according to claim 4 .
13. A heat exchanger comprising the corrugated fin according to claim 5 .
14. A heat exchanger comprising the corrugated fin according to claim 6 .
15. A heat exchanger comprising the corrugated fin according to claim 7 .
16. A heat exchanger comprising the corrugated fin according to claim 8 .
Priority Applications (1)
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US15/216,299 US20160327348A1 (en) | 2010-02-25 | 2016-07-21 | Corrugated fin and heat exchanger including the same |
Applications Claiming Priority (5)
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JP2010-040282 | 2010-02-25 | ||
JP2010040282A JP5156773B2 (en) | 2010-02-25 | 2010-02-25 | Corrugated fin and heat exchanger provided with the same |
PCT/JP2011/053840 WO2011105369A1 (en) | 2010-02-25 | 2011-02-22 | Corrugated fin and heat exchanger with same |
US201213580342A | 2012-08-21 | 2012-08-21 | |
US15/216,299 US20160327348A1 (en) | 2010-02-25 | 2016-07-21 | Corrugated fin and heat exchanger including the same |
Related Parent Applications (2)
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PCT/JP2011/053840 Continuation WO2011105369A1 (en) | 2010-02-25 | 2011-02-22 | Corrugated fin and heat exchanger with same |
US13/580,342 Continuation US20120318485A1 (en) | 2010-02-25 | 2011-02-22 | Corrugated fin and heat exchanger including the same |
Publications (1)
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US20160327348A1 true US20160327348A1 (en) | 2016-11-10 |
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US13/580,342 Abandoned US20120318485A1 (en) | 2010-02-25 | 2011-02-22 | Corrugated fin and heat exchanger including the same |
US15/216,299 Abandoned US20160327348A1 (en) | 2010-02-25 | 2016-07-21 | Corrugated fin and heat exchanger including the same |
Family Applications Before (1)
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US13/580,342 Abandoned US20120318485A1 (en) | 2010-02-25 | 2011-02-22 | Corrugated fin and heat exchanger including the same |
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US (2) | US20120318485A1 (en) |
JP (1) | JP5156773B2 (en) |
KR (1) | KR101343888B1 (en) |
CN (1) | CN102770735B (en) |
DE (1) | DE112011100691T5 (en) |
SE (1) | SE537136C2 (en) |
WO (1) | WO2011105369A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US10302372B2 (en) | 2014-02-14 | 2019-05-28 | Sumitomo Precision Products Co., Ltd. | Plate fin heat exchanger and manufacturing method for heat exchanger corrugated fins |
US10605546B2 (en) * | 2016-11-22 | 2020-03-31 | Tokyo Electric Power Company Holdings, Inc. | Heat exchanger |
EP4257911A1 (en) * | 2022-04-06 | 2023-10-11 | Volvo Car Corporation | Heat exchange module |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101116759B1 (en) * | 2007-01-25 | 2012-03-14 | 고쿠리츠다이가쿠호우진 도쿄다이가쿠 | Heat exchanger |
US9376960B2 (en) * | 2010-07-23 | 2016-06-28 | University Of Central Florida Research Foundation, Inc. | Heat transfer augmented fluid flow surfaces |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3232343A (en) * | 1962-11-24 | 1966-02-01 | Svenska Metallverken Ab | Radiator and related methods |
US4328861A (en) * | 1979-06-21 | 1982-05-11 | Borg-Warner Corporation | Louvred fins for heat exchangers |
US4796694A (en) * | 1985-08-26 | 1989-01-10 | Nihon Radiator Co., Ltd. | Cooling fin for heat exchanger |
US5040596A (en) * | 1988-04-13 | 1991-08-20 | Mitsubishi Aluminum Kabushiki Kaisha | Heat exchanger core |
US5623989A (en) * | 1994-03-03 | 1997-04-29 | Gea Luftkuhler Gmbh | Finned tube heat exchanger |
US20030213588A1 (en) * | 2002-04-27 | 2003-11-20 | Jens Nies | Corrugated heat exchange element |
US7475719B2 (en) * | 2006-12-14 | 2009-01-13 | Evapco, Inc. | High-frequency, low-amplitude corrugated fin for a heat exchanger coil assembly |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3515207A (en) * | 1968-07-17 | 1970-06-02 | Perfex Corp | Fin configuration for fin and tube heat exchanger |
JPS5730585U (en) * | 1980-07-28 | 1982-02-17 | ||
JPS62255791A (en) * | 1986-04-30 | 1987-11-07 | Matsushita Refrig Co | Heat exchanger |
JPS6314092A (en) * | 1986-07-03 | 1988-01-21 | Nippon Denso Co Ltd | Heat exchanger |
JPH0531424Y2 (en) * | 1987-04-23 | 1993-08-12 | ||
JPH01179893A (en) * | 1988-01-06 | 1989-07-17 | Komatsu Ltd | Heat exchanger |
US5372187A (en) * | 1993-05-24 | 1994-12-13 | Robinson Fin Machines, Inc. | Dual corrugated fin material |
JPH09155487A (en) | 1995-12-11 | 1997-06-17 | Denso Corp | Method for molding corrugated fin for heat exchanger |
JP3942210B2 (en) * | 1996-04-16 | 2007-07-11 | 昭和電工株式会社 | Heat exchanger, room air conditioner and car air conditioner using this heat exchanger |
JP2001050678A (en) * | 1999-08-09 | 2001-02-23 | Tokyo Radiator Mfg Co Ltd | Heat exchanger |
JP4041654B2 (en) | 2001-01-31 | 2008-01-30 | カルソニックカンセイ株式会社 | Louver fin of heat exchanger, heat exchanger thereof, and method of assembling the louver fin |
FR2834783B1 (en) * | 2002-01-17 | 2004-06-11 | Air Liquide | THERMAL EXCHANGE FIN, METHOD FOR MANUFACTURING SAME, AND CORRESPONDING HEAT EXCHANGER |
JP2003294382A (en) * | 2002-04-04 | 2003-10-15 | Toyo Radiator Co Ltd | Heat exchanger |
CN2567933Y (en) * | 2002-07-30 | 2003-08-20 | 林泓溢 | Accelerating cooling structure of radiator |
CN101040163A (en) * | 2004-10-13 | 2007-09-19 | 昭和电工株式会社 | Evaporator |
JP4483536B2 (en) * | 2004-11-10 | 2010-06-16 | 株式会社デンソー | Heat exchanger |
JP2007024349A (en) * | 2005-07-13 | 2007-02-01 | Denso Corp | Heat exchanger |
EP1912034B1 (en) * | 2005-07-29 | 2012-05-02 | The University of Tokyo | Heat exchanger, and air conditioner and air property converter that use the same |
JP2007232356A (en) * | 2006-02-01 | 2007-09-13 | Calsonic Kansei Corp | Heat exchanger for vehicle |
JP2007232246A (en) * | 2006-02-28 | 2007-09-13 | Denso Corp | Heat exchanger |
US20070246202A1 (en) * | 2006-04-25 | 2007-10-25 | Yu Wen F | Louvered fin for heat exchanger |
JP2008145024A (en) * | 2006-12-07 | 2008-06-26 | Usui Kokusai Sangyo Kaisha Ltd | Manufacturing method of flat heat transfer tube, flat heat transfer tube obtained by method, and gas cooling device incorporating flat heat transfer tube |
JP2008286446A (en) * | 2007-05-16 | 2008-11-27 | Denso Corp | Heat transfer member and heat exchanger using the same |
JP2009150621A (en) * | 2007-12-21 | 2009-07-09 | Toshiba Carrier Corp | Heat exchanger and air-conditioner |
-
2010
- 2010-02-25 JP JP2010040282A patent/JP5156773B2/en active Active
-
2011
- 2011-02-22 DE DE112011100691T patent/DE112011100691T5/en active Pending
- 2011-02-22 WO PCT/JP2011/053840 patent/WO2011105369A1/en active Application Filing
- 2011-02-22 US US13/580,342 patent/US20120318485A1/en not_active Abandoned
- 2011-02-22 KR KR1020127017021A patent/KR101343888B1/en active IP Right Grant
- 2011-02-22 CN CN201180010592.XA patent/CN102770735B/en active Active
- 2011-02-22 SE SE1250928A patent/SE537136C2/en unknown
-
2016
- 2016-07-21 US US15/216,299 patent/US20160327348A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3232343A (en) * | 1962-11-24 | 1966-02-01 | Svenska Metallverken Ab | Radiator and related methods |
US4328861A (en) * | 1979-06-21 | 1982-05-11 | Borg-Warner Corporation | Louvred fins for heat exchangers |
US4796694A (en) * | 1985-08-26 | 1989-01-10 | Nihon Radiator Co., Ltd. | Cooling fin for heat exchanger |
US5040596A (en) * | 1988-04-13 | 1991-08-20 | Mitsubishi Aluminum Kabushiki Kaisha | Heat exchanger core |
US5623989A (en) * | 1994-03-03 | 1997-04-29 | Gea Luftkuhler Gmbh | Finned tube heat exchanger |
US20030213588A1 (en) * | 2002-04-27 | 2003-11-20 | Jens Nies | Corrugated heat exchange element |
US7475719B2 (en) * | 2006-12-14 | 2009-01-13 | Evapco, Inc. | High-frequency, low-amplitude corrugated fin for a heat exchanger coil assembly |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10302372B2 (en) | 2014-02-14 | 2019-05-28 | Sumitomo Precision Products Co., Ltd. | Plate fin heat exchanger and manufacturing method for heat exchanger corrugated fins |
US10605546B2 (en) * | 2016-11-22 | 2020-03-31 | Tokyo Electric Power Company Holdings, Inc. | Heat exchanger |
EP4257911A1 (en) * | 2022-04-06 | 2023-10-11 | Volvo Car Corporation | Heat exchange module |
US11920505B2 (en) | 2022-04-06 | 2024-03-05 | Volvo Car Corporation | Heat exchange module |
Also Published As
Publication number | Publication date |
---|---|
SE537136C2 (en) | 2015-02-10 |
WO2011105369A1 (en) | 2011-09-01 |
KR20120088876A (en) | 2012-08-08 |
JP2011174676A (en) | 2011-09-08 |
US20120318485A1 (en) | 2012-12-20 |
SE1250928A1 (en) | 2012-11-12 |
CN102770735A (en) | 2012-11-07 |
KR101343888B1 (en) | 2013-12-20 |
JP5156773B2 (en) | 2013-03-06 |
DE112011100691T5 (en) | 2013-01-17 |
CN102770735B (en) | 2016-01-20 |
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