US3739840A - Heat exchanger having resiliently mounted tubular members - Google Patents

Heat exchanger having resiliently mounted tubular members Download PDF

Info

Publication number
US3739840A
US3739840A US00176953A US3739840DA US3739840A US 3739840 A US3739840 A US 3739840A US 00176953 A US00176953 A US 00176953A US 3739840D A US3739840D A US 3739840DA US 3739840 A US3739840 A US 3739840A
Authority
US
United States
Prior art keywords
elastomeric material
plate
tubes
sleeve members
circumference
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
Application number
US00176953A
Other languages
English (en)
Inventor
S Jones
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US3739840A publication Critical patent/US3739840A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/067—Details
    • 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/165—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/185—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding with additional preformed parts
    • 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
    • Y10T29/49373—Tube joint and tube plate structure

Definitions

  • ABSTRACT The invention relates to tubular heat exchange devices and in particular to improved arrangements of tube sheets for flexibly securing radiating tubes to the liquid containing chambers of the tube exchangers.
  • a perforated tube sheet was used having a bonded elastomeric material on each side.
  • the perforations in the tube sheet were required to minimize blistering of the elastomeric material which subsequently can result in water leakage and failure of the system.
  • Even constructions utilizing perforated tube sheets were still subject to blistering and ultimate failure. It is believed that this deficiency resulted from residual liquid deposits in the undrained areas of the tank which would initiate blistering.
  • Heat exchangers particularly those of the dry type, are frequently mounted so that the tubes extend substantially horizontally one above the other. in some applications, the
  • heat exchangerassemblies are canted so that the plane comprising the parallel tubes is inclined slightly in respect to a vertical plane.
  • canted assemblies are utilized in diesel electric locomotives, wherein the assemblies are flush mounted in inclined .se'ctions intermediate the vertical side wall and the horizontal roof section offthe locomotive.
  • the canted location of the heat exchanger increases the lower surface area of the elastomeric material which is subjected to residual liquid contained in the tank. Additionally, the sleeve and tube portions extending from the tube sheet into the tank preclude complete draining of the residual liquid in the tank.
  • a plurality of radiating tubes are flexibly connected to tube sheets on first and second liquid containing chambers.
  • Each tube sheet comprises a reinforcing plate having a first surface constituting an interior wall portion of the chamber which is impervious to water vapor and is directly exposed to the liquid in the chamber.
  • the plate is provided with a plurality of apertures, displaced in a discrete pattern, but has no other openings in the region which defines the interior wall portion.
  • a plurality of sleeves adapted to be secured to the periphery of the radiating tubes, are provided with one sleeve being positioned within each aperture.
  • An elastomeric material is intimately and irreversibly bonded to substantially the entire area of the second surface of the plate to provide an elastomeric sur.ace on the side of the tube sheet defining the cooling region of said heat exchanger.
  • the elastomeric material is applied so as to further extend over substantially the entire external circumference of each of said sleeves whereby the only elastomeric material on the first surface of said plate within the area defining theinterior wall portion of the chamber comprises discrete collars extending about each sleeve member.
  • the elastomeric material and plate are arranged so that moisture migrating through the elastomeric material is not condensed and blocked by the plate to cause blistering.
  • FIG. 1 is a perspective view of the heat exchange device incorporating this invention with the structural members utilized in applying the elastomeric material.
  • FIG. 1 illustrates a heat exchange device comprising a plurality of heat exchange, or radiating, tubes 11 extending between an input tank 2 and an output tank 4.
  • the input tank 2 has an outer wall portion 6 and an input liquid coupling 8.
  • a first tube sheet 12 is connected to wallportion 6, by fastening means 17.
  • the output tank 4 has an outer wall portion 7 and an output liquid coupling 9.
  • a second tube sheet 13 is connected .to wall portion 7 by fastening means 17.
  • the tubes 11 extend between tube sheets 12 and 13 so that one fluid, such as water, may, for example be circulated through the tubes and a second fluid, such as air, may be circulated externally of the tubes.
  • the radiating tubes are generally provided with external fins 14.
  • Means are provided for resiliently mounting the radiating tubes between the input and output tanks to accommodate individual changes in their lengths under varying temperature conditions while maintaining a 3 perfect liquid seal at all times.
  • the ends 'of the radiating tubes are each secured to a metal sleeve, or ferrule which has been resiliently mounted to the tube sheet.
  • the tube sheet comprises a reinforcing plate 18 constructed out of a suitably rigid material. Steel plates have commonly been utilized for this purpose. Although the liquid normally contains a rust inhibiting substance, it is desirable to utilize therefore a rust proof material, such as brass clad or coated steel, or a suitable plastic composition.
  • the plate has a first Surface l9 which constitutes an interior wall portion of the tank chamber. As illustrated in FIG. 3, a peripheral region 22 of said first surface is provided to contact an extending portion of the outer wall portion 6 of the tank chamber and is fastened thereto in a leak proof manner.
  • a series of holes 26 may be provided in the peripheral region to permit the plate to be screwed to the wallportion. Suitable gaskets of elastomeric material may be bonded about these holes. These may be applied during the molding process described subsequently.
  • the plate member comprises a plurality of apertures 16 punched, or otherwise suitably provided, in a preselected pattern.
  • a sleeve, or ferrule is resiliently secured within each aperture as subsequently descried.
  • Prior arrangements required a plate member containing plural perforations intermediate the apertures. These were required in order to assist water migration and to minimize blistering. In such arrangements water vapor penetrated the elastomeric material on the tank side and condensed as it approached the cooled plate member. In accordance to the invention, however, this problem is avoided and accordingly, the plate meinber has no openings interior of said peripheral fastening region, except for the aforesaid apertures 16.
  • the ends of the radiating tubes extend through the sleeves l5 and are rigidly secured thereto in a known manner, such as by soldering, brazing, welding, expanding or any other suitable means of providing a rigid leak proof connection.
  • One preferred method is to dip solder the tubes and sleeves subsequent to the sleeves having been resiliently secured to the plate member.
  • the sleeves have an interior circumference adapted for rigid connection to the radiating tubes and an and intimate length substantially greater than the thickness of the plate. As illustrated in FIG. 2, the sleeves 15 are positioned within the apertures of the plate member so the locomotive to extend substantially on each side thereof. The sleeves are intimately and irreversibly bonded within the apertures whose interior circumference is greater than the outer circumference of the sleeves.
  • a suitable elastomeric material of the type disclosed in US. Pat. No. 3,067,817 is utilized which effects an intimate bond to metal and which is capable of resisting the fluid employed in the heat exchange system.
  • One elastomeric material which is particularly satisfactory is compounded from a silicon rubber gum sold by the General Electric Company, Silicon Products Department under the designation No. CE-407. Such material is self-bonding and provides a very strong and intimate bond to the metal sleeves and the material of the member 18, which bond is not affected by the coolant at the temperatures encountered, for example, in the locomotive engine cooling system shown and described in US. Pat. No. 3,067,817.
  • a layer 20 of the elastomeric material is bonded to substantially the entire area of the second surface 21 of the plate member, i.e. the surface exposed to the cooling region of the heat exchanger. Additionally, the elastomeric material is bonded to substantially the entire external circumference of the ferrules. As illustrated in FIGS. 2 and 3, a surrounding collar of elastomeric material extends about the ferrule portions projecting on each side of the plate member. Thus a collar portion 25 extends outwardly into the cooling region from the second surface 21 of the plate and a collar portion 24 extends outwardly into the liquid chamber from the first surface 19 of the plate.
  • This arrangement precludes bond failures between the collar 24 and sleeve 25 due to flexures, curing shrinkage and actions incident to joining the tubes to the sleeves, such as the effects of flux used in connection with the soldering operation.
  • the opposing end portions of the sleeve 15 are flared outwardly. This flaring, in addition to assisting the insertion of the radiating tubes into the sleeves, is believed to contribute to the formation of an effective bond between the ends of the sleeves and the elastomeric material.
  • the curing shrinkage of the elastomeric material is believed to place the bond between the ferrules and the elastomeric material under compression and thus improve the elastomeric seal on the ends of the ferrules.
  • the above described arrangement is not subject to the blistering problems encountered in described prior art arrangements, while obviating the requirement of costly perforated plates and the applications of additional leakage proof laminations on the surface of the elastomeric material. It is believed that the blister phenomena occurred in prior arrangements because heated fluid migrated through the elastomeric material, condensed upon contacting the plate member and was blocked from further migration by the plate member. In the present arrangement the plate does not constitute a barrier to fluid which permeates through the elastomeric material. This permits retention of a layer of elastomeric material on the plate which in addition to providing structural support to the elastomeric seal between the plate and the ferrules provides the manufacturing advantages described subsequently.
  • FIG. 4 illustrates a transfer mold arrangement for applying the elastomeric material.
  • the mold arrangement while not a part of this invention, is described to further explain the tube sheet arrangement.
  • a first mold comprises a plurality of mold sections 32 which are secured, by screws 34 to a mold backing or support, plate 36.
  • the mold sections which are illustrated in cross-section, incorporate an extending annular member 33 and an inner projecting member 38 so as to form therebetween a toroidal cavity.
  • the projecting member preferably flares outwardly at its base. When the mold is positioned onto the sleeves 15, as illustrated in FIG. 4, the flared configuration of the projecting member 38 flares the ends of the ferrules.
  • the first mold is positioned so that the lower surface of the mold is displaced from the second surface 21 of plate 18 by a distance corresponding to the desired thickness of elastomeric layer 20. This can be accomplished by appropriate setting of the mold apparatus or alternatively by extension of screws 34, so that a portion of the screws extending outwardly of the mold sections provides for appropriate displacement.
  • the wall of the projecting member abuts against the inner surface of the sleeve so as to prevent the application of elastomeric material to the inner walls of the sleeve.
  • the inner wall of the annular member 33 extends about the ferrule with a clearance equivalent to the thickness of the elastomeric collar 25.
  • a second mold member abuts against the first surface of plate member 18.
  • the second member is similar to the first comprising mold sections 42 secured by screws 44 to a mold support plate46.
  • the elastomeric material is introduced through one or more sprues 37 of the first. mold against the second surface of plate 18.
  • the elastomeric material thus forms layer 20 and by entering the cavities of the mold sections 32 forms collars 25. Additionally, the elastomeric material flows through the annular spaces formed by apertures 16 and sleeves 15 into the cavities of the mold sections 42 to form collars 24. Accordingly, the application of the elastomeric material can be performed in a single transfer molding operation.
  • the application of layer 20 not only provides structural support, but additionally obviates the requirement to include sprues into each individual mold section. Various modifications may be made in the molding operation and the structural parts used therefor.
  • each chamber comprising:
  • a reinforcing plate having a first and a second planar surface
  • said plate comprising a plurality of displaced apertures having an interior circumference greater than the external circumference of said sleeve members; said plate having no openings interior of said peripheral fastening region, excepting for said apertures; one of said sleeve members being disposed within each of said apertures;
  • an elastomeric material intimately and irreversibly bonded to substantially the entire area of said second planar surface to provide an elastomeric surface on the side of said tube sheet defining the cooling region of said heat exchanger;
  • said elastomeric material further being intimately and irreversibly bonded to substantially the entire external circumference of each of said sleeve members, whereby the only elastomeric material on the wardly and the elastomeric material extends about the external circumference of said sleeve members to form collars extending from each end portion to said plate member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US00176953A 1971-09-01 1971-09-01 Heat exchanger having resiliently mounted tubular members Expired - Lifetime US3739840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17695371A 1971-09-01 1971-09-01

Publications (1)

Publication Number Publication Date
US3739840A true US3739840A (en) 1973-06-19

Family

ID=22646574

Family Applications (1)

Application Number Title Priority Date Filing Date
US00176953A Expired - Lifetime US3739840A (en) 1971-09-01 1971-09-01 Heat exchanger having resiliently mounted tubular members

Country Status (2)

Country Link
US (1) US3739840A (pt)
BR (1) BR7205976D0 (pt)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023618A (en) * 1975-08-18 1977-05-17 Union Carbide Corporation Heat exchanger headering arrangement
US4117884A (en) * 1975-03-21 1978-10-03 Air Frohlich Ag Fur Energie-Ruckgewinnung Tubular heat exchanger and process for its manufacture
US4285335A (en) * 1979-07-30 1981-08-25 Reliable Metal Products, Inc. Solar energy collector panel
US4578850A (en) * 1982-11-03 1986-04-01 Danhart Energy Systems Limited Method of manufacturing a heat exchanger
US4724903A (en) * 1985-02-15 1988-02-16 Sueddeutsche Kuehlerfabrik Julius Fr. Behr Gmbh & Co. Kg Heat exchanger in particular for motor vehicles
US5538079A (en) * 1994-02-16 1996-07-23 Pawlick; Daniel R. Heat exchanger with oblong grommetted tubes and locating plates
US5647432A (en) * 1996-04-10 1997-07-15 Blasch Precision Ceramics, Inc. Ceramic ferrule and ceramic ferrule refractory wall for shielding tube sheet/boiler tube assembly of heat exchanger
EP1061322A3 (en) * 1999-06-17 2002-05-29 Modine Manufacturing Company Charge air coller and method of making the same
US20050051314A1 (en) * 2002-11-22 2005-03-10 Gea Luftkuhler Gmbh Heat exchanger, and method of making a heat exchanger
US20070137845A1 (en) * 2005-12-15 2007-06-21 Valeo, Inc. Coating for components having dampening or sealing functions
US7234511B1 (en) 1995-06-13 2007-06-26 Philip George Lesage Modular heat exchanger having a brazed core and method for forming
US20130228318A1 (en) * 2010-10-04 2013-09-05 Johnson & Starley Limited Heat exchanger
US8656988B1 (en) 2010-03-03 2014-02-25 Adams Thermal Systems, Inc. External reinforcement of connections between header tanks and tubes in heat exchangers
US10082348B2 (en) 2014-09-23 2018-09-25 Enterex America LLC Heat exchanger tube-to-header sealing system
US10612855B2 (en) 2014-11-26 2020-04-07 Enterex America LLC Modular heat exchanger assembly for ultra-large radiator applications
US11230964B2 (en) * 2020-04-20 2022-01-25 Caterpillar Inc. Machine system having cooler with pack seal and header assembly for same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2225856A (en) * 1939-12-14 1940-12-24 United Aircraft Corp Heat exchanger
US3447603A (en) * 1967-07-03 1969-06-03 Gen Electric Means for resiliently mounting tubular members
US3633660A (en) * 1970-11-16 1972-01-11 Young Radiator Co Plastic bonding of heat-exchanger core-unitsto header-plates

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2225856A (en) * 1939-12-14 1940-12-24 United Aircraft Corp Heat exchanger
US3447603A (en) * 1967-07-03 1969-06-03 Gen Electric Means for resiliently mounting tubular members
US3633660A (en) * 1970-11-16 1972-01-11 Young Radiator Co Plastic bonding of heat-exchanger core-unitsto header-plates

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117884A (en) * 1975-03-21 1978-10-03 Air Frohlich Ag Fur Energie-Ruckgewinnung Tubular heat exchanger and process for its manufacture
US4023618A (en) * 1975-08-18 1977-05-17 Union Carbide Corporation Heat exchanger headering arrangement
US4285335A (en) * 1979-07-30 1981-08-25 Reliable Metal Products, Inc. Solar energy collector panel
US4578850A (en) * 1982-11-03 1986-04-01 Danhart Energy Systems Limited Method of manufacturing a heat exchanger
US4724903A (en) * 1985-02-15 1988-02-16 Sueddeutsche Kuehlerfabrik Julius Fr. Behr Gmbh & Co. Kg Heat exchanger in particular for motor vehicles
US5538079A (en) * 1994-02-16 1996-07-23 Pawlick; Daniel R. Heat exchanger with oblong grommetted tubes and locating plates
US7234511B1 (en) 1995-06-13 2007-06-26 Philip George Lesage Modular heat exchanger having a brazed core and method for forming
US5647432A (en) * 1996-04-10 1997-07-15 Blasch Precision Ceramics, Inc. Ceramic ferrule and ceramic ferrule refractory wall for shielding tube sheet/boiler tube assembly of heat exchanger
EP1061322A3 (en) * 1999-06-17 2002-05-29 Modine Manufacturing Company Charge air coller and method of making the same
US20050051314A1 (en) * 2002-11-22 2005-03-10 Gea Luftkuhler Gmbh Heat exchanger, and method of making a heat exchanger
US6929060B2 (en) * 2002-11-22 2005-08-16 GEA Luftkühler GmbH Heat exchanger, and method of making a heat exchanger
US20070137845A1 (en) * 2005-12-15 2007-06-21 Valeo, Inc. Coating for components having dampening or sealing functions
US8656988B1 (en) 2010-03-03 2014-02-25 Adams Thermal Systems, Inc. External reinforcement of connections between header tanks and tubes in heat exchangers
US20130228318A1 (en) * 2010-10-04 2013-09-05 Johnson & Starley Limited Heat exchanger
US10082348B2 (en) 2014-09-23 2018-09-25 Enterex America LLC Heat exchanger tube-to-header sealing system
US10876804B2 (en) 2014-09-23 2020-12-29 Enterex America LLC Heat exchanger tube-to-header sealing system
US10612855B2 (en) 2014-11-26 2020-04-07 Enterex America LLC Modular heat exchanger assembly for ultra-large radiator applications
US11230964B2 (en) * 2020-04-20 2022-01-25 Caterpillar Inc. Machine system having cooler with pack seal and header assembly for same

Also Published As

Publication number Publication date
BR7205976D0 (pt) 1973-08-21

Similar Documents

Publication Publication Date Title
US3739840A (en) Heat exchanger having resiliently mounted tubular members
US3447603A (en) Means for resiliently mounting tubular members
US4117884A (en) Tubular heat exchanger and process for its manufacture
US3724537A (en) Heat exchanger with backed thin tubes
US3460611A (en) Heat exchanger of plate fin modules
US3471178A (en) Tube sheet connector having flexible adhesive sealing means
US4546822A (en) Heat exchanger with adhesive seals
US3228461A (en) Heat exchanger with header tanks
IT1136636B (it) Piastra forata per scambiatori di calore a tubi di circolazione di fluido
US3033534A (en) Toroidal heat exchangers
US4120352A (en) Device for connecting exchanger tubes to perforated plates
US2539701A (en) Pressure resistant cellular radiator core
US5052477A (en) Pipe for coolant condenser
US4019572A (en) Radiator assembly for fluid filled electrical apparatus
US1797524A (en) Radiator construction
GB2042672A (en) Thermol isolation of hot and cold parts especially in heat exchangers
JPS6344708Y2 (pt)
SE467893B (sv) Bilkylare daer roeraendarna aer fastsvetsade i flaensar paa aendplaatarnas kylmedelsida och loedda paa luftsidan
US4977955A (en) Heat-transfer wall composed of two plate-like parts
JP2001099588A (ja) プレート式熱交換器
JPS6176890A (ja) 熱交換器
JPS603160B2 (ja) 熱交換器修理方法
JPS5842780Y2 (ja) 熱交換器
JPS60105895A (ja) 熱交換器
GB2254687A (en) Heat exchanger