US3877518A - Heat exchange coil - Google Patents
Heat exchange coil Download PDFInfo
- Publication number
- US3877518A US3877518A US125988A US12598871A US3877518A US 3877518 A US3877518 A US 3877518A US 125988 A US125988 A US 125988A US 12598871 A US12598871 A US 12598871A US 3877518 A US3877518 A US 3877518A
- Authority
- US
- United States
- Prior art keywords
- tubes
- tube
- return bend
- heat exchange
- mating surfaces
- 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
Links
- 239000004593 Epoxy Substances 0.000 claims abstract description 40
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 31
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 31
- 230000013011 mating Effects 0.000 claims abstract description 29
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 229920006332 epoxy adhesive Polymers 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 6
- 230000006872 improvement Effects 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 238000009736 wetting Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000005219 brazing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
- F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
- F16B11/008—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing of tubular elements or rods in coaxial engagement
-
- 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/10—Adhesive or cemented joints
- F16L13/103—Adhesive joints
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
-
- 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
- F28F2275/02—Fastening; Joining by using bonding materials; by embedding elements in particular materials
- F28F2275/025—Fastening; Joining by using bonding materials; by embedding elements in particular materials by using adhesives
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S165/00—Heat exchange
- Y10S165/454—Heat exchange having side-by-side conduits structure or conduit section
- Y10S165/495—Single unitary conduit structure bent to form flow path with side-by-side sections
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S285/00—Pipe joints or couplings
- Y10S285/915—Mastic
Definitions
- ABSTRACT Aluminum tubes particularly useful in forming heat exchange coils are joined together by first flaring and necking respective tube ends to define tapered mating surfaces to insure maximum wetting of both surfaces by the epoxy which bonds the tubes together when the epoxy coated male tube is inserted axially within the female tube.
- the present invention relates to the formation of high integrity joints between aluminum tubes and, more particularly, to the formation of a high integrity epoxy joint between tubular aluminum members particularly useful in the refrigeration field.
- Heat exchange coils of the fin and tube type havebeen manufactured in the past by utilizing thin, extruded tubes of metals having high thermal conductivity, in which case sections of tubes, after insertion through holes within a plurality of longitudinally spaced fins, are coupled together to effect a serpentine flow path through the radiating fins and may in turn, have threaded fittings and the like coupled to the extreme ends of the serpentine coil for attachment to a liquid source and drain.
- heat exchangers of this type have been formed of either copper or aluminum tubes in which case the joints between tube sections or between the tubes and the end fittings were formed generally by various brazing processes. Not only is the assembly of aluminum parts and the subsequent brazing, time consuming and therefore relatively costly and complex.
- brazing operation is highly critical with low production rates due to the need for complete rinse of the brazing flux, and a relatively high percentage of leaks occurring at the brazed joints.
- the presence of one or more leaks requires rebrazing of the assembly in the leak area to eliminate the same. While rebrazing and soldering allows some of the units to be made leak-free, certain assemblies have to be discarded, either because of the impossibility to reach the area of the leak or to successfully eliminate the same.
- the present invention is directed to a method of forming a high integrity adhesive joint between tubular aluminum members and, in particular, to an aluminum heat exchanger coil employing epoxy adhesive joints between tubular aluminum components.
- the method involves flaring the ends of one tubular member to define an outwardly tapering female mating surface portion and correspondingly necking the coupling end of the other tubular member to define a corresponding inwardly tapered female mating surface portion.
- An epoxy adhesive is supplied to at lease one of the mating surface portions, and the male tubular member is axially inserted into the female member until the epoxy uniformly wets both mating surfaces, whereupon the epoxy is cured to effect the high integrity bond.
- the axial insertion is completed when a small bead of epoxy is uniformly extruded completely around the periphery of the exposed edge of the flared female tubular member.
- the invention is particularly applicable to a heat exchange coil of the type which includes a plurality of adjacently positioned hairpin-shaped tubes, commonly supported by a plurality of longitudinally spaced heat exchange fins, with the tubes extending through holes formed within the fins.
- the ends of two separate tubes are joined by a U-shaped return bend tube to effect a serpentine configuration to the aluminum tube heat exchanger.
- the improvement lies in flaring the ends of the hairpin-shaped tubes and necking the ends of the return bend tubes or vice versa prior to applying an epoxy adhesive bond between the coplanar mating surfaces of the tube ends to effect a high integrity seal by curing the epoxy subsequent to coupling of the return bends to the exposed ends of the hairpin-shaped tubes.
- the extreme tube ends of the assembly may carry threaded couplings which in turn have cooperating tapered surfaces facing the tube ends for achieving a high integrity epoxy seal therebetween.
- FIG. 1 is a plan view of a heat exchanger coil incorporating the high integrity epoxy joint between tubular aluminum members forming components of the same.
- FIG. 2 is a side elevation of the embodiment of FIG. 1.
- FIGS. 3 and 4 are exploded sectional views of portions of the heat exchanger coil of FIG. 1 illustrating how the epoxy joints are to be completed by the method of the present invention.
- FIGS. 5 and 6 are sectional views of the coil portions of FIGS. 3 and 4, respectively, after curing of the epoxy joints.
- the present invention is exemplified in a preferred embodiment in terms of the heat exchange coil 10, FIG. I, which comprises essentially a plurality of longitudinally spaced outer fins in the form of rectangular plates 12 of aluminum or other high thermal conductive material, the fins having circular openings 14 at laterally spaced positions which receive the straight portions 16 of, in this case, a pair of hairpin aluminum tubes 18.
- the straight tube portions 16 are joined by a semicircular connecting portion 20 and the hairpin tubes 18 are joined at one end by a U-shaped return bend tube 22 and define with tubes 18, joints indicated generally at 24.
- the four tube single row coil assembly 12 therefore consists essentially of the two hairpin tubes 18 and the return bend tube 22.
- the outside straight tube portions 16 terminate at the same end of the assembly 12 as the return bend tube 22 in a pair of threaded tubular aluminum couplings 26 and the straight tube sections 16 define with couplings 26 joints 28.
- the aluminum tubes 18 and 22 are preferably formed of 3003 Alluminum Alloy or the equivalent, of zero temper, nominal three-quarter inch OD, 0.028 inch wall thickness and being formed to accommodate the return bend tube 22 of the same material and size.
- the joints 24 between the return bend tube 22 and the hairpin tubes 18 are in the form of a taper of wedge-like configuration, with the return bend tube 22 in this case forming the female part.
- the resulting overlap wedgejoint at 24 is covered with a single part epoxy hightemperature structural adhesive such as Type 2214 taper outwardly at the same angle and extend axially the same length as the neck portions 30 of the tube ends to be mated therewith.
- a mechanical deformation or swaging process may be employed with respect to both mating surfaces, to create longitudinal surface indentations or, scratches constituting an axially roughened section which materially increases the wetability between the epoxy 34 which is applied to either the male tapered surface portion 30 or the female tapered portion 32 of tubes 18 and 22 respectively.
- the epoxy 34 may be applied to both surfaces after degreasing, as mentioned previously.
- Coupling of the extreme of the outside tube ends to aluminum tubular couplings 26, is achieved in an identical manner.
- the couplings which consist of cast aluminum alloy include a threaded bore36 within a flange area 38, and the tubular fitting 26 is provided with an outwardly flared or tapered counter-bore 40 which is also at an angle of approximately to the tube axis.
- the tapered bore 40 acts as the female mating surface for the necked terminal ends 30 of tubes 18.
- either mating surface 40 or surface 30 may have applied thereto either a coating of epoxy as at 34 or both surfaces may have applied coatings prior to assembly.
- FIGS. 5 and 6 indicates portions of a completed assembly after curing. It is noted that during the axial insertion of the male mating surfaces 30 into the respective female surfaces 24 of the return bend tube 22 and 40 of the tubular end fittings 26, the insertion terminates when there is a full wetting of the surfaces by the epoxy which may be visually observed by the extrusion ofa thin bead 34' of epoxy about the edge 42 of the return bend tube 22 and the outer edge 44 of each of the threaded fittings 26. Once assembled in this manner, curing is achieved at 250 F. for a time period in excess of 50 minutes.
- the completed assembly may then be tested for leaks and any joints which are found leaking are repaired in a simple manner by applying heat to the zone of the epoxy until it burns which is above approximately 600 F. for the 2214 high temperature structural epoxy adhesive. At this temperature, the aluminum tubing and the aluminum cast fittings 26 are unaffected. The return bend tube 22 and the fittings 26 are removed after the epoxy burns and the charred exposed epoxy is cleaned either mechanically or chemically. After the burned epoxy is removed, the parent metal-is exposed and is cleaned, permitting assembly in the manner of FIG. 1 involving normal preparation, that is, degreasing, epoxy application, return bend and fitting assembly and curing.
- a chemical remover and a separate cleaner may be used under the trade names Cee Bee and product designations A227D and 21D respectively or equivalents. Epoxy may be cleaned effectively by emersing the coil ends for approximately one hour in the A227D chemical remover.
- a single hairpin tube may be employed with fittings such as fittings 26 at the free ends thereof and coupled by the epoxy jointing techniques set forth above.
- multi-tube coils may be manufactured without the necessity of the fittings 26 with the ends of the outside tubes being connected directly to piping, hoses or the like carrying oil, liquid or gaseous refrigerant or the like.
- an epoxy joint of aluminum tubes or tubular members by the improved method has many advantages.
- the assembly of the invention allows positive positioning of the parts to be joined in terms of the area which is to be epoxy bonded and at the same time asures the complete wetting of the mating surfaces by the bond material without scraping off any of the epoxy due to the axial movement of the tubular members into position for joining by the epoxy bond.
- This is to be contrasted to conventional joining of tubes by epoxy bond or otherwise in which either the inside of the female tube or the outside of the male tube is first coated with the bonding material, then, if parallel surfaces carry the coating material during the telescoping of the male member within the female member, there is a tendency for the bonding material to be scraped from the telescoping surfaces.
- the method assures complete wetting of the mating surfaces by the bond material without any scraping, since axial shifting of the male member with respect to the female is terminated when a small bead of epoxy is exposed at the outer edge of the female member which is indicative of full circumferential wetting along the complete mating tapered surfaces.
- the reverse tapering of matched mating surfaces insures uniformity in thickness and a good bond without voids, inclusions or pockets. Further, even if there is incomplete cleaning prior to the application of the epoxy and subsequent curing, there is still an excellent chance that a completely sealed joint is formed and the manufactured part will not have to be discarded or reprocessed by burning out the epoxy, recleaning and reapplication and curing of the epoxy.
- the illustrated coil there is in its most simple form the assembly of a single return bend tube as a fitting which in itself is simple in view of the joint configuration.
- the male taper of the tube and the female taper of the return bend provide a self-aligning relationship when mated to insure proper position and preventing cocking of one tube with respect to the other.
- the mating surfaces are presumed to provide a close gap with minor variances.
- the surfaces are roughened purposely during mechanical deformation to provide the flare and the necking and thus assure maximal effectiveness of the bond.
- the total mated surface area provides a lap joint which has a sheer strength in excess of the tube and where the epoxy joint is prepared and cured properly, destructive pull tests indicate that failure occurs not at the joint but at adjacent sections of the tube.
- the coils of the illustrated type have been employed in cooling lubricating oils circulating through the tubes at 250 psig and 250 F. without problem.
- the cost of an equivalent epoxy joint between aluminum tubular members may be as low as 1/10 of those involving a brazed joint between copper tubes and as low as 1/100 of the conventional comparative brazed joint between aluminum tubular members.
- aluminum tube heat exchangers of the type illustrated in FIGS. 1 and 2 indicate seal failure of less than onetenth of 1 percent as contrasted to initial seal failure of as high as 5 percent for the equivalent copper brazed joint copper tube heat exchangers.
- a heat exchange coil of the type including a plurality of adjacently positioned first hairpin shaped aluminum tubes carrying internally, a high pressure fluid, and being commonly supported by a plurality of longitudinally spaced heat exchange fins with the straight portions of said tubes extending through holes within the fins and with the ends of two separate tubes being joined by a second, U-shaped return bend aluminum tube
- the ends of one of said tubes are flared and the ends of said other tubes are necked to define axially opposed tapered mating surfaces, and wherein said tubes are coupled together solely by a uniform thickness epoxy adhesive between said mating surfaces to complete a high integrity, fluid seal bond therebetween of sufficient strength to prevent longitudinal separation of the return bend tube from the straight portions of the tubes joined thereto due to the high fluid pressure acting directly on said return bend tube and creating a resultant force tending to longitudinally separate the return bend tube from said hairpin tubes.
- thermoelectric coil as claimed in claim 1, wherein said first tubes are two in number and are coupled together by a second return bend tube and wherein said heat exchange coil further includes threaded aluminum tubular fittings having complementary tapered mating surfaces epoxy bonded to the outside ends of said respective first tubes in identical fashion to that of said return bend tube and acting as the sole means for coupling said fittings to said said first tubes.
- first tubes terminate in male neck portions defining inwardly tapered mating surfaces and said second return bend tube terminates in flared portions defining corresponding outwardly tapering mating surfaces and said assembly further includes threaded tubular aluminum fittings coupled to the outside ends of respective first tubes, said threaded tubular aluminum fittings each including an axially tapered bore which mates with a necked end of said first tube with a uniform thickness epoxy adhesive bonding the mating surfaces therebetween, and acts as the sole means for coupling said fittings to the outside ends of respective first tubes.
Abstract
Description
Claims (3)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US125988A US3877518A (en) | 1971-03-19 | 1971-03-19 | Heat exchange coil |
US00330545A US3828412A (en) | 1971-03-19 | 1973-02-08 | Method of forming high integrity epoxy joint between aluminum tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US125988A US3877518A (en) | 1971-03-19 | 1971-03-19 | Heat exchange coil |
Publications (1)
Publication Number | Publication Date |
---|---|
US3877518A true US3877518A (en) | 1975-04-15 |
Family
ID=22422415
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US125988A Expired - Lifetime US3877518A (en) | 1971-03-19 | 1971-03-19 | Heat exchange coil |
Country Status (1)
Country | Link |
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US (1) | US3877518A (en) |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2398956A1 (en) * | 1977-07-25 | 1979-02-23 | Mccord Corp | SEALLESS SEAL FOR HEAT EXCHANGER |
FR2410035A1 (en) * | 1977-11-25 | 1979-06-22 | Carrier Corp | PROCESS FOR BONDING AN ALUMINUM COIL |
FR2421322A1 (en) * | 1978-03-31 | 1979-10-26 | Butler Taper Joint Inc | Pipe joint for petroleum industry - uses liq. adhesive to seal gap between mating tapered surfaces |
US4229869A (en) * | 1979-06-11 | 1980-10-28 | General Electric Company | Method of repairing aluminum plate fin coils |
US4728128A (en) * | 1985-12-07 | 1988-03-01 | Didier-Werke Ag | Connection assembly for joining two parts |
US5211221A (en) * | 1991-11-26 | 1993-05-18 | Mccord Heat Transfer | Method and apparatus for joining coolant tubes of a heat exchanger |
US5498096A (en) * | 1994-10-28 | 1996-03-12 | Hoover Universal, Inc. | Tube joint formed with adhesive and metal forming process |
US5715889A (en) * | 1996-05-06 | 1998-02-10 | Ardco, Inc. | Heat exchanger and the method for producing same |
US5725047A (en) * | 1995-01-13 | 1998-03-10 | Lytron Incorporated | Heat exchanger |
US5845702A (en) * | 1992-06-30 | 1998-12-08 | Heat Pipe Technology, Inc. | Serpentine heat pipe and dehumidification application in air conditioning systems |
US5921315A (en) * | 1995-06-07 | 1999-07-13 | Heat Pipe Technology, Inc. | Three-dimensional heat pipe |
DE10114300C1 (en) * | 2001-03-23 | 2002-10-31 | Uponor Innovation Ab | Fitting for connecting plastic pipes to e.g. heat exchangers comprises metal pipe sections on which sleeves with profiled outer surface are fitted, ends of pipe being slid over these |
US20040169427A1 (en) * | 2001-06-28 | 2004-09-02 | Thomas Hoppe | Electric motor comprising a coiled colling pipe |
US20070120841A1 (en) * | 2002-12-10 | 2007-05-31 | Lg Electronics Inc. | Video overlay device of mobile telecommunication terminal |
US20080223050A1 (en) * | 2007-03-13 | 2008-09-18 | Dri-Eaz Products, Inc. | Dehumidification systems and methods for extracting moisture from water damaged structures |
FR2916829A1 (en) * | 2007-05-31 | 2008-12-05 | Valeo Systemes Thermiques | Intake manifold or heat transfer fluid collector and heat exchanger e.g. evaporator, connecting device for motor vehicle, has male and female sockets that are sized in manner to leave annular space for forming reservoir |
US20100044023A1 (en) * | 2008-08-21 | 2010-02-25 | Andres Alberto Canales | Heat exchanger systems & fabrication methods |
US20100125367A1 (en) * | 2008-11-17 | 2010-05-20 | Dri-Eaz Products, Inc. | Methods and systems for determining dehumidifier performance |
US20100269526A1 (en) * | 2009-04-27 | 2010-10-28 | Robert Pendergrass | Systems and methods for operating and monitoring dehumidifiers |
US20110025145A1 (en) * | 2008-04-01 | 2011-02-03 | Siemens Aktiengesellschaft | Magnet apparatus of an electrical machine with a coolant line |
USD634414S1 (en) | 2010-04-27 | 2011-03-15 | Dri-Eaz Products, Inc. | Dehumidifier housing |
US20110094992A1 (en) * | 2008-02-14 | 2011-04-28 | Eugen Bilcai | Method for Producing a Heat Exchanger |
US20130043297A1 (en) * | 2011-08-16 | 2013-02-21 | Carrier Corporation | Automatic fluxing machine |
US8784529B2 (en) | 2011-10-14 | 2014-07-22 | Dri-Eaz Products, Inc. | Dehumidifiers having improved heat exchange blocks and associated methods of use and manufacture |
USD731632S1 (en) | 2012-12-04 | 2015-06-09 | Dri-Eaz Products, Inc. | Compact dehumidifier |
US20160061536A1 (en) * | 2014-08-26 | 2016-03-03 | Cerro Flow Products Llc | Heat Exchanger and Method of Assembling the Same |
USD880679S1 (en) * | 2017-12-06 | 2020-04-07 | Amerifab, Inc. | Cooling pipe return elbow in a steel making furnace |
US11007592B2 (en) * | 2015-07-30 | 2021-05-18 | Denso Aircool Corporation | Heat exchanger and method for producing same |
US11590608B2 (en) * | 2016-12-12 | 2023-02-28 | Daicel Polymer Ltd. | Sealing method |
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---|---|---|---|---|
US1901820A (en) * | 1931-12-22 | 1933-03-14 | Arthur L Parker | Solder fittings and method of soldering |
US2105751A (en) * | 1936-05-28 | 1938-01-18 | Crosley Radio Corp | Condenser device for refrigerators |
US2498831A (en) * | 1947-10-18 | 1950-02-28 | Frederick J Veitch | Pipe joint |
US3124874A (en) * | 1964-03-17 | Method of fastening pipe together | ||
US3430692A (en) * | 1967-06-16 | 1969-03-04 | John Karmazin | Return bend construction for heat exchangers |
-
1971
- 1971-03-19 US US125988A patent/US3877518A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3124874A (en) * | 1964-03-17 | Method of fastening pipe together | ||
US1901820A (en) * | 1931-12-22 | 1933-03-14 | Arthur L Parker | Solder fittings and method of soldering |
US2105751A (en) * | 1936-05-28 | 1938-01-18 | Crosley Radio Corp | Condenser device for refrigerators |
US2498831A (en) * | 1947-10-18 | 1950-02-28 | Frederick J Veitch | Pipe joint |
US3430692A (en) * | 1967-06-16 | 1969-03-04 | John Karmazin | Return bend construction for heat exchangers |
Cited By (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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