US3443296A - Method for constructing a fin-and-tube heat exchanger having a bend formed therein - Google Patents
Method for constructing a fin-and-tube heat exchanger having a bend formed therein Download PDFInfo
- Publication number
- US3443296A US3443296A US641941A US3443296DA US3443296A US 3443296 A US3443296 A US 3443296A US 641941 A US641941 A US 641941A US 3443296D A US3443296D A US 3443296DA US 3443296 A US3443296 A US 3443296A
- Authority
- US
- United States
- Prior art keywords
- tubes
- coil
- row
- fins
- bending
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
- B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
- B21D53/085—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal with fins places on zig-zag tubes or parallel tubes
-
- 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
- B21D7/066—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies combined with oscillating members
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49366—Sheet joined to sheet
- Y10T29/49368—Sheet joined to sheet with inserted tubes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49377—Tube with heat transfer means
- Y10T29/49378—Finned tube
- Y10T29/4938—Common fin traverses plurality of tubes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
- Y10T29/5136—Separate tool stations for selective or successive operation on work
- Y10T29/5137—Separate tool stations for selective or successive operation on work including assembling or disassembling station
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
- Y10T29/5188—Radiator making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53113—Heat exchanger
- Y10T29/53122—Heat exchanger including deforming means
Definitions
- This invention relates to the art of fin-and-tube heat exchangers and particularly to those heat exchangers comprising a stack of generally planar parallel fins having a plurality of tubes extending normally therethrough.
- Such tubes may be disposed in a coplanar arrangement as in a one-row heat exchanger coil. Or, they may be arranged in two or more planes as in a two or more row coil. Often a two-row coil is preferred over a one-row coil for the reason that it requires less face area forthe equivalent heat transfer surface.
- a fin-and-tube heat exchanger coil so that the coil lies generally along two or more intersecting planes
- a refrigerant condenser coil so that it forms two or more sides of a rectangular condensing unit.
- Conventionally one-row coils of this type have been bent with tangent type coil bending machines.
- a tangent type bender fixedly clamps one leg or end of the coil while a bending platen journalled at a fixed center is pivoted to wrap the other leg of the coil over a curved forming die located at the bight of the bend.
- a bend of final curvature progresses from one end toward the other end of the area to be bent.
- Patented May 13, 1969 It is also an object to provide a method for constructing a multiple row fin-and-tube heat exchange coil with a discrete bend.
- This invention includes a method of constructing a fin-and-tube heat exchange coil having a depth of at least two rows of tubes and bent to a predetermined angle com prising the steps of: providing a first plurality of generally straight first tubes; providing a second plurality of generally straight second tubes; providing a plurality of generally planar fins each having a first row of spaced first apertures adapted to receive and embrace a first row of tubes and a second row of spaced second apertures spaced from said first row adapted to receive and embrace a second row of tubes; arranging said fins in generally parallel superposed relation and positioning said first tubes within said first apertures and said second tubes within said second apertures thereby forming a fin-andtube heat exchange coil having spaced first and second rows of tubes respectively whereby the tubes of said first row lie within a first plane and the tubes of said second row lie within a second plane parallel to and spaced a predetermined distance from said first plane; fixedly securing said first tubes to said fins for maintaining a uniform spacing of said fins during
- FIGURE 1 illustrates the step of arranging the fins on the tubes to form a two-row heat exchange coil
- FIGURE 2 is an enlarged sectional view of a fragment of the coil of FIGURE 1 and illustrates the subsequent step of expanding the tubes of only one row prior to the step of bending the coil;
- FIGURE 3 is a section taken at line 33 of FIGURE 4 through a fin-and-tube heat exchanger coil bending machine incorporating aspects of the instant invention and showing the heat exchanger coil of FIGURE 2 mounted therein ready for bending;
- FIGURE 4 is a side elevation of the coil bending machine shown in FIGURE 3;
- FIGURE 5 is a view similar to FIGURE 3 after the coil bending machine thereof has been moved through the bending steps;
- FIGURE 6 is a diagrammatic showing of the relative movement of the two platens of the coil bending machine shown in FIGURES 3-5 as the machine performs the step of bending the heat exchange coil of FIGURE 2 and particularly showing the locus of instant centers of relative motion between the platens of the machine;
- FIGURE 7 is a view similar to FIGURE 3 showing a modified form of the coil bending machine of FIGURE 3;
- FIGURE 8 is a view similar to FIGURE 5 showing the modified coil bending machine after the bending step
- FIGURE 9 is a view similar to FIGURE 6 illustrating the relative platen movement for the modified coil bending machine of FIGURES 7 and 8;
- FIGURE 10 illustrates the step of expanding the tubes of all rows of the coil subsequent to the coil bending step.
- FIGURES 1-6 and 10 there is shown a fin-and-tube heat exchange coil 10 having a first row 11 of coplanar parallel laterally spaced tubes 12; a second row 13 of coplanar parallel laterally spaced tubes 14; and a plurality of generally planar rectangular relatively thin heat conductive fins 15 each having a first row 16 and a second row 17 of apertures 18 therein to receive respectively the tubes 12 and 14 of first and second tube rows 11 and 13.
- the fins 15 are stacked on the tubes in parallel generally spaced relationship. This stacking step is illustrated in FIGURE 1. It will be appreciated that in the alternative the tubes 12 and 14 may be inserted into the apertures 18 of the stacked fins 15.
- the one manner of arranging the tubes with respect to the fins is considered the full equivalent of the other. It will also be appreciated, as more fully illustrated in FIG- URE 2, that the collar 19 at each aperture 18 is preferably in contact with an adjacent fin whereby the fins become substantially equally spaced prior to bending of the coil. Subsequent to arranging the fins 15 with respect to the tubes 12 and 14, the tubes 12 of row 11 are expanded within the apertures 18 of row 16 to secure a mechanical bond between the fins 15 and the tubes 12 of the first row of tubes. This is accomplished by passing a bullet 20 (FIGURE 2) of larger size through the tubes 12 by any of several methods known to the art of heat exchange coil construction.
- the expander bullet diameter will be different for different size tubes and is best determined by experiment on the basis of best results.
- the tubes .14 of row 13 are not expanded at this time so as to permit tubes 13 to slide relative to fin 15 during a subsequent bending step as more fully described hereinafter.
- the heat exchanger coil assembly 10 is then clamped into the coil bending machine 21 of FIGURES 3-5 or the modified coil bending machine 21a of FIGURES 7, 8 and 9.
- coil bending machine 21 has two stationary guide plate members 22 fixed in parallel spaced relation. Interposed between guide members 22 are first elongated platen 23 and second elongated platen 24 each having a primary pressure bearing planar surface 25 for supporting a first face of the heat exchanger coil 10. Platens 23 and 24 are so arranged that surfaces 25 are initially coplanar and normal to guide members 22 as shown in FIGURES 3 and 4. Heat exchanger coil 10, following the aforementioned tube expanding step shown in FIGURE 2, is laid upon and clamped to surfaces 25 via a clamp means 26 on each platen.
- Each clamp means may include a pair of legs 27 extending upwardly from surface 25 at the margins thereof and a clamp plate 28 extending between the free ends of legs 27 for the purpose of applying pressure on the other or second face of coil 10 via bolts 29.
- Each platen further includes an angle member 30 which presents a secondary pressure bearing surface at the ends of the tubes 12.
- Members 30 may be integral with or merely attached to the platens as desired.
- the platens 23 and 24 each have at their adjacent ends a pair of laterally projecting pins 31 which are slidably received in vertically extending guide slots 32 in guide members 22.
- the platens 23 and 24 each further have at their remote ends a pair of laterally projecting pins 33 which are slidably received in horizontally extending guide slots 34 in guide members 22.
- platens 23 and 24 may be rotatably guided by pins 31 and 33 and slots 32 and 34 from the position shown in FIGURE 3 to the position shown in FIGURE 5.
- a hydraulic power cylinder 35 anchored to guide members 22 by pin 36.
- the piston rod 37 of the hydraulic cylinder 35 may be pivotally connected to links 38 as by bolt 39 which are in turn connected to adjacent ends of platens 23 and 24 at ears 40 as by pins 41. It will thus be appreciated that extension of the power cylinder piston rod 37 causes the platens to move from the position shown in FIGURE 3 to their position shown in FIGURE 5, thereby bending the heat exchanger coil 10 as shown in FIGURE 5. It should be noted that it is not necessary that the platens 23 and 24 contact the fins at any point along the bend of the coil 10 and that there is no substantial movement of the platens relative to the coil fins clamped therein.
- the heat exchange coil bending machine 21 shown is constructed to provide coil 10 with up to a bend having a neutral axis plane N coinciding with the longitudinal axes of tubes 12.
- a neutral axis plane N coinciding with the longitudinal axes of tubes 12.
- pins 31 and 33 and slots 32 and 34 may be determined as follows.
- Pins 31 and 33 are located on platen 23 at points B and E respectively when the platen is in the position shown in FIGURE 3.
- Pins 31 and 33 are located on platen 24 at points B and E respectively when the platen is in the position shown in FIGURE 3.
- the straight vertical diverging slots or grooves 32 are formed in each of guide members 22 connecting between B and D, and B and D for guiding pins 31.
- the straight horizontal slots or grooves 34 are formed in each of guide members 22 connecting between C and E, and C and E for guiding pins 33.
- the clamp plates 28 are removed and the bent coil 10 can be removed from machine 21.
- the hydraulic power cylinder 35 may then be contracted to return the platens to their position of FIGURE 3 for receiving another coil 10.
- the machine 21 may be designed for a slight over bend to compensate for the slight spring back that is often encountered in bending.
- FIGURE 6 illustrates the movement of platen 24 relative to platen 23 during the bending step.
- Platen 24 rotates 180-A relative to platen 23 about an instant center moving relative to platen 23 along a locus or path P.
- Path P is substantially an arc of 90 /2A having a radius substantially equal to and a center at 8.
- the radius R of the coil bend from the central axis of curvature T to the neutral axis N is gradually reduced and the bend is effected simultaneously over the entire bend area as shown in FIGURE 6.
- the tubes 14 of the outside row 13 are expanded such as by passing an expander bullet 42 therethrough as illustrated in FIGURE 10 to secure an efficient heat conductive mechanical connection, especially in the bend area, between the tubes 14 and fins 15.
- the tubes 12 of row 11 are further expanded at this time with an expander bullet 43 also to secure an efficient heat conductive mechanical connection, especially in the bend area between the tubes 12 and fins 15.
- Bullet 43 is several thousandths of an inch larger in diameter than first expander bullet 20.
- the ends of tubes 12 and 14 may then be appropriately connected to provide the desired heat exchanger coil circuits.
- the platen guide pins 31 and 33 may be transposed with guide slots 32 and 34.
- the slots formed on the platen members would be curvilinear and thus more difficult to construct than the straight grooves 32 and 34 of FIGURES 3-5.
- the heat exchanger coil bending machine of FIGURES 3-5 may be simplified by substituting for the plural links 38 thereof a single link 38:: for connecting the inner ends of the platens by pins 31a of the coil bending machine 21a shown in FIGURES 7, 8 and 9.
- Platens 23a and 244 may be recessed at 44 to accommodate link 38a.
- the pins 31a are located on platens 23a and 24a (FIGURE 7) at points G and G respectively for vertical movement in slots or grooves 32a on each of guide members 22a which slots extend in parallel relation to vertical axis V from points G to points F and from points G to points F.
- Points F, F, G and G may be located in the following manner:
- Link 38a is connected to a piston rod 37a of hydraulic cylinder 35a anchored by pin 36a to guide members 22a for driving movement of the platens 23a and 24a.
- the operation of the coil bending machine 21a is substantially the same as coil bending machine 21.
- the machine elements of the modified form of the invention move from a position shown in FIGURE 7 to a position shown in FIGURE 8.
- platen 24a rotates 180--A relative to platen 23a about an instant center moving relative to platen 23a along a locus or path Q.
- Path Q is substantially an arc of 90--- /2A having a radius equal to 1rR(180A )/360 and a center S coinciding with pin 31a of platen 23a as shown in FIGURE 9.
- the platen guide pins 31a and 33 may be transposed with guide slots 32a and 34. Again, however, in such case, the slots formed on the platen members would be curvilinear and thus more difiicult to construct than the straight grooves 32a and 34 of FIG- URES 7 and 8.
- a method of constructing a fin-and-tube heat exchange coil having a depth of at least two rows of tubes and bent to a predetermined angle comprising the steps of: providing a first plurality of generally straight first tubes; providing a second plurality of generally straight second tubes; providing a plurality of generally planar fins each having a first row of spaced first apertures adapted to receive and embrace a first row of tubes and a second row of spaced second apertures spaced from said first row adapted to receive and embrace a second row of tubes; arranging said fins in generally parallel superposed relation and positioning said first tubes within said first apertures and said second tubes within said second apertures thereby forming a fin-and-tube heat exchange coil having spaced first and second rows of tubes respectively whereby the tubes of said first row lie in a first plane and the tubes of said second row lie in a second plane parallel to and spaced a predetermined distance from said first plane; fixedly securing said first tubes to said fins for maintaining a uniform spacing of said fins during a subsequent coil bending
- a method of constructing a fin-and-tube heat exchange coil having a depth of at least two rows of tubes and bent to a predetermined angle comprising the steps of providing a first plurality of generally straight first tubes; providing a second plurality of generally straight second tubes; providing a plurality of generally planar fins each having a first row of spaced first apertures adapted to receive and embrace a first row of tubes and a second row of spaced second apertures spaced from said first row of apertures adapted to receive and embrace a second row of tubes; arranging said fins in generally parallel superposed relation and positioning said first tubes within said first apertures and said second tubes within said second apertures thereby forming a fin-and-tube heat exchange coil having spaced first and second rows of tubes respectively whereby the tubes of said first row lie in a first plane and the tubes of said second row lie in a second plane parallel to and spaced a predetermined distance from said first plane; expanding said first tubes within said first apertures to maintain a uniform spacing of said fins during a subsequent coil bending step
- a method of constructing a fin-and-tube heat exchange coil having a depth of at least two rows of tubes and bent to a predetermined angle comprising the steps of: providing a first plurality of generally straight first tubes; providing a second plurality of generally straight second tubes; providing a plurality of generally planar fins each having a first row of spaced first apertures adatped to receive and embrace a first row of tubes and a second row of spaced second apertures spaced from said first row of apertures adapted to receive and embrace a second row of tubes; arranging said fins in generally parallel superposed relation and positioning said first tubes within said first apertures and said second tubes within said second apertures thereby forming a fin-and-tube heat exchange coil having spaced first and second rows of tubes respectively whereby the tubes of said first row lie in a first plane and the tubes of said second row lie in a second plane parallel to and spaced a predetermined distance from said first plane; and bending a portion of said heat exchange coil to said predetermined angle about a central axis
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US64194167A | 1967-05-29 | 1967-05-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3443296A true US3443296A (en) | 1969-05-13 |
Family
ID=24574494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US641941A Expired - Lifetime US3443296A (en) | 1967-05-29 | 1967-05-29 | Method for constructing a fin-and-tube heat exchanger having a bend formed therein |
Country Status (1)
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US (1) | US3443296A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2830690A1 (en) * | 1977-07-14 | 1979-02-01 | United Aircraft Prod | METHOD AND DEVICE FOR PRODUCING MECHANICAL PIPE CONNECTIONS |
US4443921A (en) * | 1980-09-01 | 1984-04-24 | Societe Anonyme Des Usines Chausson | Method for the manufacture of heat exchangers with curved elements |
US4727737A (en) * | 1986-12-31 | 1988-03-01 | Heil-Quaker Home Systems, Inc. | Method and apparatus for bending a heat exchanger coil |
US4831856A (en) * | 1987-07-13 | 1989-05-23 | Tru-Cut Die Corp. | Heat exchanger coil bending apparatus and method |
US4893391A (en) * | 1987-06-27 | 1990-01-16 | Kuhlerfabrik Langerer & Reich Gmbh & Co. Kg | Method and apparatus for producing round-rolled parts for heat exchangers |
CN1058427C (en) * | 1993-06-02 | 2000-11-15 | 株式会社日立制作所 | Apparatus for and method of bending and heat exchanger |
JP2016155134A (en) * | 2015-02-23 | 2016-09-01 | 三菱電機株式会社 | Flexure device of heat exchanger |
US10584921B2 (en) * | 2014-03-28 | 2020-03-10 | Modine Manufacturing Company | Heat exchanger and method of making the same |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2023738A (en) * | 1931-01-30 | 1935-12-10 | Bush Mfg Company | Means for assembling and securing radiating fins on tubes |
US2298895A (en) * | 1942-02-28 | 1942-10-13 | Gen Electric | Method of making heat exchange units |
US2876823A (en) * | 1953-06-10 | 1959-03-10 | Bundy Tubing Co | Bending pad structure and associated apparatus for bending tube |
US3200631A (en) * | 1962-08-06 | 1965-08-17 | Peerless Of America | Apparatus for effecting reverse bends in dual heat exchange tubing |
US3208261A (en) * | 1961-12-11 | 1965-09-28 | Peerless Of America | Method of forming reverse bends in extruded integral dual-passage heat exchange tubing |
US3253326A (en) * | 1962-10-11 | 1966-05-31 | Combustion Eng | Method of bending concentrically arranged tubes simultaneously |
-
1967
- 1967-05-29 US US641941A patent/US3443296A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2023738A (en) * | 1931-01-30 | 1935-12-10 | Bush Mfg Company | Means for assembling and securing radiating fins on tubes |
US2298895A (en) * | 1942-02-28 | 1942-10-13 | Gen Electric | Method of making heat exchange units |
US2876823A (en) * | 1953-06-10 | 1959-03-10 | Bundy Tubing Co | Bending pad structure and associated apparatus for bending tube |
US3208261A (en) * | 1961-12-11 | 1965-09-28 | Peerless Of America | Method of forming reverse bends in extruded integral dual-passage heat exchange tubing |
US3200631A (en) * | 1962-08-06 | 1965-08-17 | Peerless Of America | Apparatus for effecting reverse bends in dual heat exchange tubing |
US3253326A (en) * | 1962-10-11 | 1966-05-31 | Combustion Eng | Method of bending concentrically arranged tubes simultaneously |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2830690A1 (en) * | 1977-07-14 | 1979-02-01 | United Aircraft Prod | METHOD AND DEVICE FOR PRODUCING MECHANICAL PIPE CONNECTIONS |
US4443921A (en) * | 1980-09-01 | 1984-04-24 | Societe Anonyme Des Usines Chausson | Method for the manufacture of heat exchangers with curved elements |
US4727737A (en) * | 1986-12-31 | 1988-03-01 | Heil-Quaker Home Systems, Inc. | Method and apparatus for bending a heat exchanger coil |
US4893391A (en) * | 1987-06-27 | 1990-01-16 | Kuhlerfabrik Langerer & Reich Gmbh & Co. Kg | Method and apparatus for producing round-rolled parts for heat exchangers |
US4831856A (en) * | 1987-07-13 | 1989-05-23 | Tru-Cut Die Corp. | Heat exchanger coil bending apparatus and method |
CN1058427C (en) * | 1993-06-02 | 2000-11-15 | 株式会社日立制作所 | Apparatus for and method of bending and heat exchanger |
US10584921B2 (en) * | 2014-03-28 | 2020-03-10 | Modine Manufacturing Company | Heat exchanger and method of making the same |
JP2016155134A (en) * | 2015-02-23 | 2016-09-01 | 三菱電機株式会社 | Flexure device of heat exchanger |
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Owner name: A-S CAPITAL INC., A CORP OF DE Free format text: MERGER;ASSIGNOR:TRANE COMPANY THE A WI CORP;REEL/FRAME:004432/0765 Effective date: 19840224 |