US2427336A - Heat transfer unit - Google Patents

Heat transfer unit Download PDF

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Publication number
US2427336A
US2427336A US590237A US59023745A US2427336A US 2427336 A US2427336 A US 2427336A US 590237 A US590237 A US 590237A US 59023745 A US59023745 A US 59023745A US 2427336 A US2427336 A US 2427336A
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United States
Prior art keywords
tubing
heat transfer
strips
portions
transfer unit
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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
US590237A
Inventor
Askin Joseph
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Peerless of America Inc
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Peerless of America Inc
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Priority to US590237A priority Critical patent/US2427336A/en
Application granted granted Critical
Publication of US2427336A publication Critical patent/US2427336A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F28F2215/00—Fins
    • F28F2215/12—Fins with U-shaped slots for laterally inserting conduits
    • 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
    • Y10S165/497—Serpentine flow path with straight side-by-side sections
    • Y10S165/498—Fin assembly extends across 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
    • 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

Definitions

  • the invention relates to heat transfer units.
  • heat transfer units such as condensers for a refrigerant
  • One object of the invention is to provide a coil of this type with fin-forming strips through which a series of parallel tubing-members extend, and in which said members are secured with con tacting areas between the fin-strips and the tubing for efficient heat transfer.
  • Another object of the invention is to provide a heat transfer unit which comprises a coil of tubing with integral bends at its ends and intermediate connecting-members between the bends which, in cross-sectional contour, are deformed for efllcient heat transfer from the fluid passing through'the tubing to fin-Strlps having surfaces contacting with and conforming to the deformed tubing.
  • a still further object of the invention is to provide a heat transfer unit which comprises tubing having substantially parallel members serially connected by integral bends and fin-forming sheet metal strips which is simple in construction, can be produced at low cost, and is efficient in heat transfer.
  • Claim. (01. 257-262) and outlet l3 are, in cross-section, deformedto increase the rate of flow of the fluid between said bends.
  • Each tube-member ID, in cross-section has a portion I5 curved on a relatively large radius, an oppositely disposed portion l6 which is curved on a smaller radius, and substantially straight convergent side-portions l'l opposite the differently curved portions.
  • the bends II are cylindrical in cross-section.
  • the tubing-members Ill extend through a series of strips i8 which are formed of sheet metal having a. high coefiicient heat conduction. Each strip has a seriesfof openings which conform series of said tubing-members.
  • Each strip I8 is formed around a portion of each hole 20 with an integral flange il extending transversely to the plane of the strip'and longitudinally of the tubing-members Ill. These flanges 2i conform to and fit around the convergent side portions i1 and the curved portion 16 which is formed on a curve of lesser diameter than the longitudinally curved portion I5 0n the opposite side of the tubing. Each fin-strip i8 is also formed with integral arcuate flanges 22 which project transv versely from the plane of the strip and. extend
  • Fig. 1 is a side elevation of the heat transfer 1 unit embodying the invention.
  • Fig. 2 is an end view.
  • Fig. 3 is a perspective on an enlarged scale of one of the fin-strips and a portion of the coil.
  • Fig. 4 is a perspective of a portion of the finstrip which is provided with openings into which the tubing may be placed before the strips are bent to secure the tubing in the strips.
  • the invention is exemplified in a heat transfer unit, for example, a condenser which comprises a coil of tubing which is formed of a continuous length of stock bent to form a series of parallel tube-members Ill connected by 180 integral bends II.
  • the ends of the tubing, as at 12 and i3 provide connections for inlet and outlet pipes for the fiuid, such as a refrigerant gas.
  • the parallel tube-members l0 between bends ii, and inlet 62 longitudinally of and conform to opposite sides of curved portion l5 of the tubing which is curved on the greater diameter.
  • the strips 18 may be formed with an offset rib IQ for stiffening them.
  • This cross-sectional contour of coil-members Ill produces low frictional resistance to and increases the velocity of the gas in transit through said members, for improved heat conduction.
  • soldering or brazing This may be done by dipping the unit in'solder which causes the solder to be held by capillary attraction in the corners of the joints between the strips, draining the other solder from the unit and the plates including the meeting edges of the portions 27.
  • the tubing and strips may also be copper-plated and bonded together by hydrogen brazing.
  • each strip is split as at 26 between the openings 20 therein and one edge of the strip to render the porentisz gagement with the convergent side portions l1 and the curved portion [6 of the tubing.
  • the metal in portions 2'! will close the openings in the strips 18.
  • the heat transfer is improved by virtue 01 having a greater amount of indirect surface as well as by virtue of an increase in contact between the direct and indirect surfaces.
  • the unit may be fabricated according to the method set forth in an application filed by me on April 25, 1945, serially numbered 590,238.
  • the invention exemplifies a heat transfer unit which comprises a coil formed of a single length of tubing and tin-strips adapted for eflicient heat transfer from the tubing which is efllcient in operation, is composed of few parts, and may be produced at low cost.
  • a heat transfer unit comprising a coil of tubing having a series of integral parallel portions connected by integral bends, the bends being cylindrical in cross-section, the parallel portions of the tubing having in cross-section oppositely disposed portions, one of which is curved on a greater radius than the other and substantially flat convergent portions between the curved portions, and one-piece fin strips, of sheet material having a series of openings through which the parallel portions of the tubing extend and conforming to said cross-sectional contour of the parallel portions, splits extending from the portions of the openings fitting the portions of the greater radius to one edge 01 the strips through which the parallel portions of the tubing can be inserted transversely into the openings, arcuate flanges on the portions of the strips extending around the portions of the tube having the greater radius and flanges each conforming to the flat convergent portions and the curved portions having lesser radius of the tubing.

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  • 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)

Description

Sept. 16,1947. J.,ASK|N 2,427,336
' HEAT TRANSFER UNIT Filed A ril 25, 1945 Patented Sept. 16, 1947 HEAT TRANSFER UNIT Ind., assignor to Peerless Joseph Askin, Marion,
of America, Inc., Chicago,
of Illinois 7 111., a corporation Applicatlon April 25, 1945, Serial No. 590,237
The invention relates to heat transfer units. In heat transfer units, such as condensers for a refrigerant, it has been found advantageous to form a coil through which fiuid passes for heat transfer from a single length of tubing with integral bends at the ends and parallel members between the bends and to use sheet metal finforming strips through which the tubing extends for heat transfer from the tubing.
One object of the invention is to provide a coil of this type with fin-forming strips through which a series of parallel tubing-members extend, and in which said members are secured with con tacting areas between the fin-strips and the tubing for efficient heat transfer.
Another object of the invention is to provide a heat transfer unit which comprises a coil of tubing with integral bends at its ends and intermediate connecting-members between the bends which, in cross-sectional contour, are deformed for efllcient heat transfer from the fluid passing through'the tubing to fin-Strlps having surfaces contacting with and conforming to the deformed tubing.
A still further object of the invention is to provide a heat transfer unit which comprises tubing having substantially parallel members serially connected by integral bends and fin-forming sheet metal strips which is simple in construction, can be produced at low cost, and is efficient in heat transfer.
Other objects of the invention will appear from the detailed description.
1 Claim. (01. 257-262) and outlet l3 are, in cross-section, deformedto increase the rate of flow of the fluid between said bends. Each tube-member ID, in cross-section, has a portion I5 curved on a relatively large radius, an oppositely disposed portion l6 which is curved on a smaller radius, and substantially straight convergent side-portions l'l opposite the differently curved portions. The bends II are cylindrical in cross-section.
The tubing-members Ill extend through a series of strips i8 which are formed of sheet metal having a. high coefiicient heat conduction. Each strip has a seriesfof openings which conform series of said tubing-members.
to the cross-sectional contour of tube-members it and extends transversely across the entire Each strip I8 is formed around a portion of each hole 20 with an integral flange il extending transversely to the plane of the strip'and longitudinally of the tubing-members Ill. These flanges 2i conform to and fit around the convergent side portions i1 and the curved portion 16 which is formed on a curve of lesser diameter than the longitudinally curved portion I5 0n the opposite side of the tubing. Each fin-strip i8 is also formed with integral arcuate flanges 22 which project transv versely from the plane of the strip and. extend The invention consists in the several features Fig. 1 is a side elevation of the heat transfer 1 unit embodying the invention.
Fig. 2 is an end view.
Fig. 3 is a perspective on an enlarged scale of one of the fin-strips and a portion of the coil.
Fig. 4 is a perspective of a portion of the finstrip which is provided with openings into which the tubing may be placed before the strips are bent to secure the tubing in the strips.
The invention is exemplified in a heat transfer unit, for example, a condenser which comprises a coil of tubing which is formed of a continuous length of stock bent to form a series of parallel tube-members Ill connected by 180 integral bends II. The ends of the tubing, as at 12 and i3 provide connections for inlet and outlet pipes for the fiuid, such as a refrigerant gas. The parallel tube-members l0 between bends ii, and inlet 62 longitudinally of and conform to opposite sides of curved portion l5 of the tubing which is curved on the greater diameter. The strips 18 may be formed with an offset rib IQ for stiffening them. This cross-sectional contour of coil-members Ill produces low frictional resistance to and increases the velocity of the gas in transit through said members, for improved heat conduction. After assembly of the strips and tubing in this manner, they are bonded together by soldering or brazing. This may be done by dipping the unit in'solder which causes the solder to be held by capillary attraction in the corners of the joints between the strips, draining the other solder from the unit and the plates including the meeting edges of the portions 27. The tubing and strips may also be copper-plated and bonded together by hydrogen brazing.
In order to permit the coil of tubing to be assembled and extend through strips l8, each strip is split as at 26 between the openings 20 therein and one edge of the strip to render the porentisz gagement with the convergent side portions l1 and the curved portion [6 of the tubing. Flanges 22, after the split portions 01 the strips are bonded together, provide increased contact area.
'7 and firm contact between the strips I I and the curved portion I5 oi the tubing. In the assembled unit, the metal in portions 2'! will close the openings in the strips 18. The heat transfer is improved by virtue 01 having a greater amount of indirect surface as well as by virtue of an increase in contact between the direct and indirect surfaces.
The unit may be fabricated according to the method set forth in an application filed by me on April 25, 1945, serially numbered 590,238.
The invention exemplifies a heat transfer unit which comprises a coil formed of a single length of tubing and tin-strips adapted for eflicient heat transfer from the tubing which is efllcient in operation, is composed of few parts, and may be produced at low cost.
The invention is not to be understood as limited to the details described, since these may be modified within the scope of the appended claim without departing from the spirit and scope of the invention.
Having thus described the invention. what I claim as new and desire to secure by Letters Pat- A heat transfer unit comprising a coil of tubing having a series of integral parallel portions connected by integral bends, the bends being cylindrical in cross-section, the parallel portions of the tubing having in cross-section oppositely disposed portions, one of which is curved on a greater radius than the other and substantially flat convergent portions between the curved portions, and one-piece fin strips, of sheet material having a series of openings through which the parallel portions of the tubing extend and conforming to said cross-sectional contour of the parallel portions, splits extending from the portions of the openings fitting the portions of the greater radius to one edge 01 the strips through which the parallel portions of the tubing can be inserted transversely into the openings, arcuate flanges on the portions of the strips extending around the portions of the tube having the greater radius and flanges each conforming to the flat convergent portions and the curved portions having lesser radius of the tubing.
JOSEPH ASKIN.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS 'Great Britain Aug. 24, 1933
US590237A 1945-04-25 1945-04-25 Heat transfer unit Expired - Lifetime US2427336A (en)

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532302A (en) * 1948-01-02 1950-12-05 Mccord Corp Method of making heat exchangers
US2532301A (en) * 1945-11-29 1950-12-05 Mccord Corp Condenser
US2558952A (en) * 1947-12-10 1951-07-03 Mccord Corp Method of making heat exchange devices
US2613900A (en) * 1949-09-12 1952-10-14 Leo A Byrnie Panel unit for radiant heating
US2716802A (en) * 1951-10-08 1955-09-06 Tranter Mfg Inc Method of making heat exchange devices
US2834583A (en) * 1955-09-19 1958-05-13 Houdaille Industries Inc Heat exchanger
US2850793A (en) * 1953-03-20 1958-09-09 Gen Motors Corp Method of making refrigerating apparatus
US2880602A (en) * 1955-10-04 1959-04-07 American Viscose Corp Yarn processing reel having inter-drum baffle
US2994123A (en) * 1956-06-14 1961-08-01 Richard W Kritzer Method of forming heat transfer units
US3021804A (en) * 1955-02-18 1962-02-20 Modine Mfg Co Method of fabricating heat exchangers
US3443634A (en) * 1967-04-06 1969-05-13 Peerless Of America Heat exchangers
US4192052A (en) * 1976-02-23 1980-03-11 E. I. Du Pont De Nemours And Company Method for bonding a heat exchanger fin to a tube
US4624301A (en) * 1982-09-14 1986-11-25 Crescent Metal Products, Inc. Gas convection oven with egg-shaped heat exchanger tube
US5042576A (en) * 1983-11-04 1991-08-27 Heatcraft Inc. Louvered fin heat exchanger
US20050061492A1 (en) * 2001-12-17 2005-03-24 Showa Denko K.K. Heat exchanger and process for fabricating same
US6964296B2 (en) 2001-02-07 2005-11-15 Modine Manufacturing Company Heat exchanger
US20060048387A1 (en) * 2004-09-08 2006-03-09 Chen Shyh M Punching and riveting assembly of a heat dissipater and heat conducting tubes
FR2875591A1 (en) * 2004-09-17 2006-03-24 Valeo Thermique Moteur Sas Heat exchanger for motor vehicle, has fins each of which has projections in its reception openings, where projections are folded on tubes when they are received in openings, to prevent movement between tubes and fins
US20060175047A1 (en) * 2005-02-07 2006-08-10 Denso Corporation Heat exchanger, method of manufacturing heat exchanger and plate-shaped fin for heat exchanger
US20070169921A1 (en) * 2006-01-26 2007-07-26 Cooper Cameron Corporation Fin and tube heat exchanger
US20070261817A1 (en) * 2004-11-26 2007-11-15 Masaaki Kitazawa Heat Exchanger
US20080028610A1 (en) * 2006-07-26 2008-02-07 Shyh-Ming Chen Method for assembling a vertical heat radiator
US20130299153A1 (en) * 2011-01-21 2013-11-14 Daikin Industries, Ltd. Heat exchanger and air conditioner
CN105934645A (en) * 2014-01-15 2016-09-07 三星电子株式会社 Heat exchanger and air conditioner having same
FR3088706A1 (en) * 2018-11-16 2020-05-22 Valeo Systemes Thermiques HEAT EXCHANGER FOR A MOTOR VEHICLE AND METHOD FOR MANUFACTURING THE HEAT EXCHANGER

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1773249A (en) * 1928-08-21 1930-08-19 Fedders Mfg Co Inc Condenser
US1788068A (en) * 1928-12-24 1931-01-06 Mcquay Radiator Corp Heat-exchange device
US1854278A (en) * 1929-11-27 1932-04-19 Carrier Construction Company I Heat exchange device
US1874009A (en) * 1930-05-28 1932-08-30 John J Nesbitt Inc Expanded tube radiator
GB397360A (en) * 1932-06-09 1933-08-24 Asea Ab Gilled pipes and a method for their manufacture
US2036417A (en) * 1932-12-08 1936-04-07 Wilbur G Laird Method of making fin radiators
US2170774A (en) * 1938-02-19 1939-08-22 Bush Mfg Company Method of making radiators

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1773249A (en) * 1928-08-21 1930-08-19 Fedders Mfg Co Inc Condenser
US1788068A (en) * 1928-12-24 1931-01-06 Mcquay Radiator Corp Heat-exchange device
US1854278A (en) * 1929-11-27 1932-04-19 Carrier Construction Company I Heat exchange device
US1874009A (en) * 1930-05-28 1932-08-30 John J Nesbitt Inc Expanded tube radiator
GB397360A (en) * 1932-06-09 1933-08-24 Asea Ab Gilled pipes and a method for their manufacture
US2036417A (en) * 1932-12-08 1936-04-07 Wilbur G Laird Method of making fin radiators
US2170774A (en) * 1938-02-19 1939-08-22 Bush Mfg Company Method of making radiators

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532301A (en) * 1945-11-29 1950-12-05 Mccord Corp Condenser
US2558952A (en) * 1947-12-10 1951-07-03 Mccord Corp Method of making heat exchange devices
US2532302A (en) * 1948-01-02 1950-12-05 Mccord Corp Method of making heat exchangers
US2613900A (en) * 1949-09-12 1952-10-14 Leo A Byrnie Panel unit for radiant heating
US2716802A (en) * 1951-10-08 1955-09-06 Tranter Mfg Inc Method of making heat exchange devices
US2850793A (en) * 1953-03-20 1958-09-09 Gen Motors Corp Method of making refrigerating apparatus
US3021804A (en) * 1955-02-18 1962-02-20 Modine Mfg Co Method of fabricating heat exchangers
US2834583A (en) * 1955-09-19 1958-05-13 Houdaille Industries Inc Heat exchanger
US2880602A (en) * 1955-10-04 1959-04-07 American Viscose Corp Yarn processing reel having inter-drum baffle
US2994123A (en) * 1956-06-14 1961-08-01 Richard W Kritzer Method of forming heat transfer units
US3443634A (en) * 1967-04-06 1969-05-13 Peerless Of America Heat exchangers
US4192052A (en) * 1976-02-23 1980-03-11 E. I. Du Pont De Nemours And Company Method for bonding a heat exchanger fin to a tube
US4624301A (en) * 1982-09-14 1986-11-25 Crescent Metal Products, Inc. Gas convection oven with egg-shaped heat exchanger tube
US5042576A (en) * 1983-11-04 1991-08-27 Heatcraft Inc. Louvered fin heat exchanger
US6964296B2 (en) 2001-02-07 2005-11-15 Modine Manufacturing Company Heat exchanger
US20050061492A1 (en) * 2001-12-17 2005-03-24 Showa Denko K.K. Heat exchanger and process for fabricating same
US20060048387A1 (en) * 2004-09-08 2006-03-09 Chen Shyh M Punching and riveting assembly of a heat dissipater and heat conducting tubes
FR2875591A1 (en) * 2004-09-17 2006-03-24 Valeo Thermique Moteur Sas Heat exchanger for motor vehicle, has fins each of which has projections in its reception openings, where projections are folded on tubes when they are received in openings, to prevent movement between tubes and fins
US20070261817A1 (en) * 2004-11-26 2007-11-15 Masaaki Kitazawa Heat Exchanger
US20060175047A1 (en) * 2005-02-07 2006-08-10 Denso Corporation Heat exchanger, method of manufacturing heat exchanger and plate-shaped fin for heat exchanger
US20070169921A1 (en) * 2006-01-26 2007-07-26 Cooper Cameron Corporation Fin and tube heat exchanger
US10415894B2 (en) * 2006-01-26 2019-09-17 Ingersoll-Rand Company Fin and tube heat exchanger
US20080028610A1 (en) * 2006-07-26 2008-02-07 Shyh-Ming Chen Method for assembling a vertical heat radiator
US20130299153A1 (en) * 2011-01-21 2013-11-14 Daikin Industries, Ltd. Heat exchanger and air conditioner
CN105934645A (en) * 2014-01-15 2016-09-07 三星电子株式会社 Heat exchanger and air conditioner having same
FR3088706A1 (en) * 2018-11-16 2020-05-22 Valeo Systemes Thermiques HEAT EXCHANGER FOR A MOTOR VEHICLE AND METHOD FOR MANUFACTURING THE HEAT EXCHANGER

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