EP0005959A1 - Wärmeaustauschrippen und Vorrichtung zu deren Herstellung - Google Patents
Wärmeaustauschrippen und Vorrichtung zu deren Herstellung Download PDFInfo
- Publication number
- EP0005959A1 EP0005959A1 EP19790300923 EP79300923A EP0005959A1 EP 0005959 A1 EP0005959 A1 EP 0005959A1 EP 19790300923 EP19790300923 EP 19790300923 EP 79300923 A EP79300923 A EP 79300923A EP 0005959 A1 EP0005959 A1 EP 0005959A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strips
- secondary surface
- louvres
- surface element
- element according
- 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.)
- Granted
Links
Images
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
- F28F1/34—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 obliquely
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
- B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/022—Making the fins
- B21D53/025—Louvered 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
-
- 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
- F28F1/128—Fins with openings, e.g. louvered fins
Definitions
- This invention relates to heat exchangers and in particular to secondary surface elements for heat exchangers.
- Louvred sheet material is already known for use in heat exchangers and the material may take several forms, such as in a fin and tube heat exchanger in which the tubes pass through apertures in a plurality of secondary surface fins.
- Corrugated sheet material is also used in which such material is located between tubes and louvres are formed in the flanks of the corrugations. In such arrangements the louvres are inclined or twisted relative to the plane of the associated sheet and gaps are formed in the material through which heat exchange medium can pass.
- a secondary surfuce element for a heat exchanger comprises sheet material formed with successive mutually inclined integral portions, each arranged to be inclined to the general direction of flow of heat exchange medium over the elements and the mutually inclined portions having louvres formed therein, each louvre lying in a plane inclined to the plane of the associated portion of the element.
- the louvres should be inclined at less than a right angle to the general direction of flow.
- the sheet material is formed in successive V-shaped portions, the louvres being formed in the flanks of the V and lying in planes inclined to the flanks of the V.
- a secondary surface element for a heat exchanger comprises corrugated sheet material formed of a plurality of corrugated strips, each strip being similarly shaped and corresponding portions of the flanks of the corrugations in adjacent strips being displaced from one another in the longitudinal direction of the strips whereby the leading edge of each flank is displaced in one direction from the trailing edge of the corresponding flank of an immediately adjacent strip, the strips being joined to one another to form a unitary structure, and the flanks of the corrugations each being inclined in the opposite direction to said displacement at an acute angle to the longitudinal direction of the strip.
- apparatus for forming the secondary surface element comprises a pair of rolls and drive means for driving at least one of the rolls so that the rolls rotate in opposite directions, each roll being formed of a set of laminae arranged side by side along the axis of the associated roll and each lamina in a set having a corrugated profile with circumferentially spaced teeth, corresponding edges of the teeth of adjacent laminae being angularly displaced from one another about the axis of the associated roll, and the teeth of one set of laminae being arranged in mesh with the teeth of the other set of lamina, and the teeth of the laminae lying on helical paths extending around the associated roll and the element being formed by feeding sheet material between the rolls.
- a secondary surface element for heat exchangers is shown which is intended for use in a heat exchanger of the fin and tube kind, only the fin being shown in Fig. 1.
- the fin of Fig. 1 has a leading edge portion 41 and a trailing edge portion 42 lying in a common plane.
- An intermediate portion 43 lies parallel to the leading edge and trailing edge portions 41, 42 but in a plane offset from the plane of these portions.
- Mutually inclined integral portions 44 and 45 join and are arranged symmetrically with respect to the portions 41, 42 and 43 to be of generally inverted V-shape with the apex of the V flattened at 43. It will be appreciated that a succession of inclined portions similar to those at 44 and 45 may be provided, extending in The direction indicated by the arrow A. This direction is also the direction in which heat exchange medium, for example air, flows to the fin in its use in a heat exchanger.
- the inclined portion 44 is formed with a set of louvres 46 extending between plane lateral edges of the fin, each of the louvres 46 making an acute angle to and intersecting the inclined portion 44. In this case the louvres 46 are also at an angle to the plane in which the portion 41 lies.
- the inclined portion 45 is also formed with a set of louvres 47 which are inclined in the opposite direction to the louvres 46.
- the louvres 47 are inclined to and intersect the portion 45 and also, in this case, the louvres 47 are inclined to the plane of the portion 42.
- the angle of the louvres 46 and 47 relative to their respective inclined portions 44 and 45 may be such that the louvres are parallel to the planes of the portions 41 and 42.
- a secondary surface element or fin of the kind shown in Fig. 1 may be incorporated in a heat exchanger of the fin and tube kind in the manner illustrated in Figs. 2 and 3.
- Figs. 2 and 3 only one fin is illustrated but it will be appreciated that a large number of spaced apart and parallel fins will generally be employed.
- the heat exchanger of Figs. 2 and 3 has four rows of tubes 50, tubes in the second and fourth rows being offset with respect to those in the first and third rows.
- the tubes 50 pass through apertures in the fins which are in close contact with and secured, for example by solder, to the tube to give good heat transfer between the tubes and the secondary surface fins.
- Each fin has a leading edge 51, a trailing edge 52 and an intermediate portion 53 parallel to but offset from the leading and trailing edges. Extending between and integral with the portions 51 and 53, and 53 and 52, are mutunlly inclined portions 54 and 55 respectively.
- Sets of parallel louvres 56 are formed in the portion 54 between the tubes 50 of the first row and a tube 50 passes through the portion 54 downstream of the louvres 56 with respect to the direction of flow A.
- Similar louvres 56A are formed in the portion 54 in between the tubes of the second row, as seen in Fig. 3, which figure also indicates the lateral extent of the louvres and the unlouvred area of the portion 54.
- the louvres 56 and 56A are similarly arranged to the louvres 46 of Fig. 1. .
- Sets of parallel louvres 57 are also formed in the inclined portion 55 laterally of and between the tubes 50 of the third row and further sets of louvres 57A are formed in the portion 55 between the tubes of the fourth row.
- the louvres 57 and 57A are inclined in the opposite direction to the louvres 56 and 56A.
- the louvres 57 and 57A are similarly arranged to the louvres 47 of Fig. 1.
- Air flow to the fin of Figs. 2 and 3 is in the direction A and, in passing over the fin, the air passes from one side to the other of the fin through the louvres 56 and 56A and then back through the louvres 57 and 57A.
- the fin of Figs. 2 and 3 is of generally inverted V-shape having a flattened apex at 53, the louvres being formed in the mutually inclined flanks 54 and 55 of the V.
- a succession of V-shaped portions may be formed along the air flow path.
- the arrangement of Figs. 2 and 3 is in the general form of a fin and tube heat exchanger in which a heat exchange relationship is set up between a fluid passing through the tubes and a fluid passing over the fins.
- the inclined portions may be joined directly at the apex of the V.
- the leading and/or trailing ends of the inclined portions may constitute the leading and trailing edges by dispensing with the portions 41 and 42 and/or 51 and 52.
- the louvred fin of Fig. 1 and Figs. 2 and 3 may be made from sheets of metal foil in which the louvres are formed in known manner, the louvred sheet being shaped by bending to the desired configuration, as described.
- the fin provides an improved air flow path over the fin because the louvres provide relatively large gaps without reducing the number of louvres present.
- a secondary surface element is shown suitable for use sandwiched between heat exchanger tubes in the manner shown in Fig. 7.
- the element of Figs. 4, 4A, 5 and 5A is of corrugated form and is made from metal sheet or foil, the corrugations in this case being of truncated triangular form each with flat crests 17. It will, however, be appreciated that corrugations of other shapes can be formed, for example of generally sinusoidal shape or with relatively wider or narrower flat crests, provided that these are such that the material retains a unitary structure.
- Each of the strips 11, 12 and 13 is displaced from its adjacent strips by an amount d and the extent of the displacement d may be selected according to pitch P of the corrugations.
- the height of the secondary surface is given as h.
- each strip 11, 12 and 13 has a leading and trailing edge, such as at 11a, 12a and 11b, 12b, having regard to a direction of flow A of fluid over the material which direction A is at a right angle to the longitudinal direction of the strips.
- Adjacent strips are interconnected at the crests 17 at 17a to form a unitary structure.
- the displacement of adjacent strips from one another can be of any desired amount, ranging from a small displacement d by which the corrugations are aligned with one another in rows lying perpendicular to the longitudinal direction of the strips, to a larger displacement d of the order of a third the pitch P of the corrugations.
- a complete secondary surface element is shown in which the direction of displacement d of the adjacent strips is reversed centrally of the element. At the same point in the strips as the reversal of displacement takes place the direction of inclination of the flanks of the corrugations is also reversed.
- the central strip 30 may be parallel to the general direction of florA, as shown, or it may be of V-shaped profile, the limbs of the V lying parallel to the sets of strips to each side of the strip 30.
- the element is of symmetrical configuration about the strip 30 and this, together with the inclination of the flanks, enables the material to-be readily formed, as will be described.
- the free edges 11a, 11b of the strips can extend the full height h of the material. This compares with louvred material in which the louvres do not extend the full height but are formed along only a portion of the flanks of the corrugations.
- Fig. 7 the material of Fig. 6 is assembled with tubes 31 so that an element is bounded on each side by a row of tubes 31.
- a heat exchange fluid is passed through the tubes 31 and a flow of further fluid, usually air, passes over the element in the general direction of arrows A to set up a heat exchange relationship between the two fluids.
- the secondary surface element may be sandwiched between sheets in layers to form a cross-flow or a counter-flow heat exchanger.
- Apparatus for forming the corrugated material of Figs. 4-7 is shown in Figs. 8 and 9 of the drawings and it comprises a pair of rolls 20 and 21 mounted on parallel shafts 22 and 23 for rotation in opposite directions, each roll being made up of laminae 24 arranged side by side in contact with one another and each lamina having an outer profile formed with circumferentially-spaced teeth 25. Adjacent laminae in each roll are angularly displaced from one another about the axis of the associated roll by a predetermined amount, as will be explained, and the teeth mesh together on rotation with a suitable space between them to receive the metal sheet or foil to be corrugated.
- the teeth 25 are helically arranged, that is, each tooth on each lamina lies along a helical path extending around the associated roll. This gives rise to the flanks of the teeth extending at an acute angle to lines parallel to the axis of the associated roll, which angle is the same for all the teeth so that the teeth may mesh with one another. Moreover, the helical paths on which the teeth of each lamina lie are equally spaced from one another circumferentially of the lamina.
- One way of imagining the constructions of the rolls is to consider a pair of matching helical gear wheels. Divide each gear wheel into a plurality of laminae along lines at right angles to the axes of the wheels and then displace each lamina a small amount angularly in relation to its next adjacent lamina in the opposite direction to the inclination of the flanks of the teeth and in a manner such that the gear wheels can mesh together.
- helical teeth may be machined in an assembly of generally disc like laminae which are then angularly displaced from one another.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2533478 | 1978-05-31 | ||
GB2533478 | 1978-05-31 | ||
GB7910746 | 1979-03-27 | ||
GB7910746 | 1979-03-27 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0005959A1 true EP0005959A1 (de) | 1979-12-12 |
EP0005959B1 EP0005959B1 (de) | 1982-03-17 |
EP0005959B2 EP0005959B2 (de) | 1987-08-26 |
Family
ID=26257624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19790300923 Expired EP0005959B2 (de) | 1978-05-31 | 1979-05-24 | Wärmeaustauschrippen und Vorrichtung zu deren Herstellung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0005959B2 (de) |
DE (2) | DE7928310U1 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4648443A (en) * | 1981-02-06 | 1987-03-10 | Energiagazdalkodasi Intezet | Heat exchanger with ribbed fin |
EP0319451A1 (de) * | 1987-12-02 | 1989-06-07 | Carrier Corporation | Wellenförmige Rippen mit Schlitzen für Wärmeaustauscher |
EP0325553A1 (de) * | 1988-01-11 | 1989-07-26 | Carrier Corporation | Wellenförmige Rippe |
FR2651568A1 (fr) * | 1989-09-07 | 1991-03-08 | Galmes Alain | Echangeur a ailettes perfectionne. |
FR2798990A1 (fr) * | 1999-09-29 | 2001-03-30 | Denso Corp | Double echangeur de chaleur pour conditionneur d'air de vehicule |
US20170198983A1 (en) * | 2016-01-08 | 2017-07-13 | Hanon Systems | Fin for heat exchanger |
WO2019221169A1 (ja) * | 2018-05-16 | 2019-11-21 | モリテックスチール株式会社 | メタルシート及びこれを備えた積層体 |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE410189A (de) * | ||||
NL1056C (nl) * | 1911-11-22 | 1916-02-01 | Beran Albert | Universeelwalsen voor het vervaardigen van gegolfd karton, gegolfd plaatijzer en dergelijke |
US1416570A (en) * | 1918-01-22 | 1922-05-16 | Arthur B Modine | Radiator core |
CH219262A (de) * | 1939-08-28 | 1942-01-31 | Ungarische Radiatoren Fabriks | Lamellen-Wärmeaustauschvorrichtung. |
CH220298A (de) * | 1938-10-22 | 1942-03-31 | Beck Stefan | Wärmeaustauschvorrichtung. |
DE1132163B (de) * | 1953-07-04 | 1962-06-28 | Buderus Eisenwerk | Waermeaustauscher mit in parallelen Reihen angeordneten flachen und in Stroemungs-richtung des Waermeaustauschmediums kurzen Waermeaustauschkoerpern |
US3083662A (en) * | 1957-07-19 | 1963-04-02 | Borg Warner | Heat exchanger and method of making same |
US3265127A (en) * | 1963-10-21 | 1966-08-09 | Ford Motor Co | Heat exchange element |
US3433044A (en) * | 1963-02-19 | 1969-03-18 | Ford Motor Co | Method for forming heat exchange element |
US3796258A (en) * | 1972-10-02 | 1974-03-12 | Dunham Bush Inc | High capacity finned tube heat exchanger |
FR2270544A1 (de) * | 1974-05-10 | 1975-12-05 | Nippon Denso Co | |
US3940966A (en) * | 1973-12-05 | 1976-03-02 | Covrad Limited | Apparatus for shaping sheet material |
US3993125A (en) * | 1975-11-28 | 1976-11-23 | Ford Motor Company | Heat exchange device |
DE2806421A1 (de) * | 1977-02-17 | 1978-08-24 | Covrad Ltd | Wellblech, sowie vorrichtung und verfahren zu dessen herstellung |
-
1979
- 1979-05-23 DE DE19797928310 patent/DE7928310U1/de not_active Expired
- 1979-05-24 EP EP19790300923 patent/EP0005959B2/de not_active Expired
- 1979-05-24 DE DE7979300923T patent/DE2962272D1/de not_active Expired
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE410189A (de) * | ||||
NL1056C (nl) * | 1911-11-22 | 1916-02-01 | Beran Albert | Universeelwalsen voor het vervaardigen van gegolfd karton, gegolfd plaatijzer en dergelijke |
US1416570A (en) * | 1918-01-22 | 1922-05-16 | Arthur B Modine | Radiator core |
CH220298A (de) * | 1938-10-22 | 1942-03-31 | Beck Stefan | Wärmeaustauschvorrichtung. |
CH219262A (de) * | 1939-08-28 | 1942-01-31 | Ungarische Radiatoren Fabriks | Lamellen-Wärmeaustauschvorrichtung. |
DE1132163B (de) * | 1953-07-04 | 1962-06-28 | Buderus Eisenwerk | Waermeaustauscher mit in parallelen Reihen angeordneten flachen und in Stroemungs-richtung des Waermeaustauschmediums kurzen Waermeaustauschkoerpern |
US3083662A (en) * | 1957-07-19 | 1963-04-02 | Borg Warner | Heat exchanger and method of making same |
US3433044A (en) * | 1963-02-19 | 1969-03-18 | Ford Motor Co | Method for forming heat exchange element |
US3265127A (en) * | 1963-10-21 | 1966-08-09 | Ford Motor Co | Heat exchange element |
US3796258A (en) * | 1972-10-02 | 1974-03-12 | Dunham Bush Inc | High capacity finned tube heat exchanger |
US3940966A (en) * | 1973-12-05 | 1976-03-02 | Covrad Limited | Apparatus for shaping sheet material |
FR2270544A1 (de) * | 1974-05-10 | 1975-12-05 | Nippon Denso Co | |
US3993125A (en) * | 1975-11-28 | 1976-11-23 | Ford Motor Company | Heat exchange device |
DE2806421A1 (de) * | 1977-02-17 | 1978-08-24 | Covrad Ltd | Wellblech, sowie vorrichtung und verfahren zu dessen herstellung |
FR2380828A1 (fr) * | 1977-02-17 | 1978-09-15 | Covrad Ltd | Procede et appareil pour realiser des feuilles de materiau ondule |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4648443A (en) * | 1981-02-06 | 1987-03-10 | Energiagazdalkodasi Intezet | Heat exchanger with ribbed fin |
EP0319451A1 (de) * | 1987-12-02 | 1989-06-07 | Carrier Corporation | Wellenförmige Rippen mit Schlitzen für Wärmeaustauscher |
EP0325553A1 (de) * | 1988-01-11 | 1989-07-26 | Carrier Corporation | Wellenförmige Rippe |
FR2651568A1 (fr) * | 1989-09-07 | 1991-03-08 | Galmes Alain | Echangeur a ailettes perfectionne. |
FR2798990A1 (fr) * | 1999-09-29 | 2001-03-30 | Denso Corp | Double echangeur de chaleur pour conditionneur d'air de vehicule |
US20170198983A1 (en) * | 2016-01-08 | 2017-07-13 | Hanon Systems | Fin for heat exchanger |
US10094624B2 (en) * | 2016-01-08 | 2018-10-09 | Hanon Systems | Fin for heat exchanger |
WO2019221169A1 (ja) * | 2018-05-16 | 2019-11-21 | モリテックスチール株式会社 | メタルシート及びこれを備えた積層体 |
Also Published As
Publication number | Publication date |
---|---|
DE7928310U1 (de) | 1980-01-31 |
DE2962272D1 (en) | 1982-04-15 |
EP0005959B2 (de) | 1987-08-26 |
EP0005959B1 (de) | 1982-03-17 |
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