US2646972A - Fin type radiator - Google Patents

Fin type radiator Download PDF

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Publication number
US2646972A
US2646972A US142503A US14250350A US2646972A US 2646972 A US2646972 A US 2646972A US 142503 A US142503 A US 142503A US 14250350 A US14250350 A US 14250350A US 2646972 A US2646972 A US 2646972A
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tabs
radiator
stamping
fin type
type radiator
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US142503A
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Edward C Schmid
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Knapp Monarch Co
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Knapp Monarch Co
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    • 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
    • F28D1/03—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 plate-like or laminated conduits
    • F28D1/0391—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 plate-like or laminated conduits a single plate being bent to form one or more conduits
    • 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
    • F28D1/03—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 plate-like or laminated conduits
    • F28D1/0308—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0035—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for domestic or space heating, e.g. heating radiators
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Definitions

  • This invention relates to a fin type radiator and more particularly to simple and novel fin type radiators which are formed in a novel manner from metal stampings.
  • Fin type radiators of the prior art are formed of a heat conductive shell on which are mounted fins. These fins may be in the form of a plurality of thin annular sheets that are welded to the shell, or may be a single thin sheet of metal that is rolled onto the shell in a spiral and welded thereto. This fin type radiator is rather ex pensive to fabricate. The laborand difficulty involved in attaching the fins to the shell of the radiator makes the entire fabricating process costly and time consuming. I, I 7
  • one of the objects of this invention is to provide a fin type radiator of novel design in which the fins are integral with the shell of the radiator.
  • Another object of this invention is to provide a fin type radiator of novel design in which the fins are integral with the shell of the radiator, and whose fins are twisted so as to simulate spiral fins.
  • a further object of this invention is to provide a fin type radiator of novel and simple design which may be easily and inexpensively produced.
  • FIG. 1 is a plan view of one form of my novel fin type radiator.
  • FIG. 2 is a side view of the radiator shown in Figure 1.
  • Figure 3 is a cross sectional view of the radiator taken substantially on the line 3-3 of Figure 1.
  • Figure 4 is a plan view of another form of the novel fin type radiator.
  • Figure 5 is a side view of the form of the radiator shown in Figure l.
  • Figure 6 is an end view of the form of the fin type radiator shown in Figure 4 and taken substantially on the line 66 of Figure 4.
  • Figure 7 is a plan view of another form of the novel fin type radiator.
  • Figure 8 is a cross sectional view of the form of radiator shown in Figure 7 and is taken substantially on the line 88 of Figure 7.
  • Figure 9 is a plan view of still another form of the novel fin type radiator.
  • Figure 10 is a cross sectional view of ,the form of radiator shown in Figure 9 and is taken substantially on line Ill-Ii] of Figure 9.-
  • Figure 11 is a side view of a modification of the form of the radiator shown in Figure 9 showing the fins in twisted position
  • Figure 12 is an end view of the modified form of radiator shown in Figure 11 and is taken substantially on the line I2I2 of Figure 11.
  • Figure 13 is a view, partially in cross section. showing the manner in which a heating element is assembled within a fin type radiator of the form shown in Figure 1.
  • Figures 1, 2 and 3 show a fin type radiator which is formedby a pair of sheet stampings I I of conductive material. A portion of each stamping along opposite longitudinal edges has formed therein a plurality of tabs I2. These tabs I2 may be formed in stamping II by simply stamping out the material between the tabs I2. A longitudinal strip-like portion I3 is provided in each stamping adjacent the base of each set of tabs I2. Since there are two sets of tabs I2 in each stamping I I, there are two strip-like portions I3 in each stamping. These strip-like portions I3 of each sheet II are adapted to have secured thereto similar striplike portions I3 in the other stamping II forming the radiator. The corresponding strip-like portions I3 of two stampings II are joined together in any well known manner, and preferably by spot welding.
  • each stamping between the pair of strip-like portions I3 is bent to the form of a half cylinder as shown in Figure 3. Then the pair of stampings I I are positioned in mirror image fashion so that the strip-like portions I3 of the opposed stampings I I butt against each other. The half cylinders of the opposed sheets II are then in register so as to form a tubular body I5.
  • the tabs I2 are bent outward from the plane of the original sheet of material so as to provide more evenly spaced heat conductive members. The tabs I2 may also be twisted in the manner shown in Figures 4 and 11 to partially simulate spiral finning on the radiator.
  • the modified form of radiator shown in Figures 4, 5 and 6 is formed of a single stamping 2
  • a portion of the stamping ZI along one longitudinal edge has formed therein a plurality of tabs 22.
  • These tabs 22 may be formed by a plurality of slots 22a cut in sheet 2
  • a longitudinal strip-like portion 23 is provided adjacent the base of the set of tabs 22.
  • Another strip-like portion 24 is provided adjacent the other longitudinal edge of stamping 2
  • between the pair of strip-like portions 23 and 24 is bent so as to form a tubular body 26.
  • the tabs 22 are twisted in the manner shown in Figures 4 to 6 so as to partially simulate spiral finning on the radiator.
  • the modified form of radiator shown in Figures 7 and 8 is formed by a pair of stampings 3i of conductive material. Only one longitudinal edge of each stamping 3
  • are formed by stamping out the material between the tabs 32.
  • the tabs 32 in any set of tabs are then spaced from each other.
  • the width of each stamped out portion 31 between the tabs 32 is substantially equal to the width of each tab 32.
  • the modified form of radiator shown in Figures 9 and 10 is formed by a pair of stamping-s of heat conductive material. Both longitudinal edges of each stamping has formed therein a plurality of tabs 42. The tabs 42 are spaced from each other a distance substantially equal to the width of a tab 42. In this modification the tabs 42 on one edge of each stamping extend alternately with respect to the tabs on the opposite edge of that stamping. Thus, for any tab 42 the edge directly opposite on that stamping has a stamped out portion 41 and vice versa. Strip-like portions 43 and 44, and a half cylinder section 45 are also provided in each stamping. The two half cylinder sections 45 are in register in the assembled radiator to form a tubular body 45.
  • each stamping is aligned relative to the opposite stamping so that the tabs 42 on one stamping are adjacent the stamped out portions 4'! of the opposite stamping and vice versa.
  • the tabs 42 may be diverging as shown in Figure 10 in a manner similar to the form shown in Figures 2 to 3. As shown in Figures 11 and 12 the tabs 42 may be twisted to partially simulate spiral finning on a radiator. Since the fins 42 on adjacent stampings extend alternately, the twisted fins 42 are aligned to better simulate the spiral fins on a radiator.
  • a fin type radiator of the form shown in Figure 1 is shown with a heating element of a well known type installed therein.
  • the heating element consists of an electrical resistance element 51 which is completely enclosed in a non-electrical conductor 52.
  • This nonelectrical conductor 52 usually is clay or some other ceramic material.
  • a fin type radiator comprising a pair of elongated sheets of conductive material adapted to mate with each other, each sheet having a set of similar tabs formed in a longitudinal end portion thereof, the tabs of each said set being spaced from each other a distance substantially equal to the width of a tab at its base, each said sheet forming a wall portion of an elongated hollow member, said sheets being joined together to form an elongated hollow member having fins extending therefrom, the tabs on one sheet being positioned alternately with the tabs on the other sheet so that each tab is longitudinally positioned between an adjacent pair of tabs in the opposite sheet, said tabs being twisted, and the extended end of each tab being aligned with the end of one of the adjacent tabs on the other sheet to form portions of spiral fins.

Description

y 8 953 E. c. SCHMID 2,646,972
FIN TYPE RADIATOR Filed Feb. 4, 1950 IN VEN TOR.
Patented July 28, 1953 FIN TYPE RADIATOR Edward 0. Schmid, St. Louis, Mo., assignor to Knapp-Monarch Company, St. Louis, Mo., a
corporation of Delaware Application February 4, 1950, Serial No. 142,503
2 Claims.
This invention relates to a fin type radiator and more particularly to simple and novel fin type radiators which are formed in a novel manner from metal stampings.
Fin type radiators of the prior art are formed of a heat conductive shell on which are mounted fins. These fins may be in the form of a plurality of thin annular sheets that are welded to the shell, or may be a single thin sheet of metal that is rolled onto the shell in a spiral and welded thereto. This fin type radiator is rather ex pensive to fabricate. The laborand difficulty involved in attaching the fins to the shell of the radiator makes the entire fabricating process costly and time consuming. I, I 7
Thus, one of the objects of this invention is to provide a fin type radiator of novel design in which the fins are integral with the shell of the radiator.
Another object of this invention is to provide a fin type radiator of novel design in which the fins are integral with the shell of the radiator, and whose fins are twisted so as to simulate spiral fins.
A further object of this invention is to provide a fin type radiator of novel and simple design which may be easily and inexpensively produced.
Further objects and advantages of. this invention will become apparent as the following description proceeds and the features of novelty which characterize this invention will be pointed out with particularity in the claims annexed to and forming part of this specification.
A preferred embodiment of the invention is shown in the accompanying drawing, in which- Figure 1 is a plan view of one form of my novel fin type radiator.
Figure 2 is a side view of the radiator shown in Figure 1.
Figure 3 is a cross sectional view of the radiator taken substantially on the line 3-3 of Figure 1.
Figure 4 is a plan view of another form of the novel fin type radiator.
Figure 5 is a side view of the form of the radiator shown in Figure l.
Figure 6 is an end view of the form of the fin type radiator shown in Figure 4 and taken substantially on the line 66 of Figure 4.
Figure 7 is a plan view of another form of the novel fin type radiator.
Figure 8 is a cross sectional view of the form of radiator shown in Figure 7 and is taken substantially on the line 88 of Figure 7.
Figure 9 is a plan view of still another form of the novel fin type radiator.
Figure 10 is a cross sectional view of ,the form of radiator shown in Figure 9 and is taken substantially on line Ill-Ii] of Figure 9.-
Figure 11 is a side view of a modification of the form of the radiator shown in Figure 9 showing the fins in twisted position, and
Figure 12 is an end view of the modified form of radiator shown in Figure 11 and is taken substantially on the line I2I2 of Figure 11.
Figure 13 is a view, partially in cross section. showing the manner in which a heating element is assembled within a fin type radiator of the form shown in Figure 1.
Referring to the drawing, Figures 1, 2 and 3 show a fin type radiator which is formedby a pair of sheet stampings I I of conductive material. A portion of each stamping along opposite longitudinal edges has formed therein a plurality of tabs I2. These tabs I2 may be formed in stamping II by simply stamping out the material between the tabs I2. A longitudinal strip-like portion I3 is provided in each stamping adjacent the base of each set of tabs I2. Since there are two sets of tabs I2 in each stamping I I, there are two strip-like portions I3 in each stamping. These strip-like portions I3 of each sheet II are adapted to have secured thereto similar striplike portions I3 in the other stamping II forming the radiator. The corresponding strip-like portions I3 of two stampings II are joined together in any well known manner, and preferably by spot welding.
The central portion M of each stamping between the pair of strip-like portions I3 is bent to the form of a half cylinder as shown in Figure 3. Then the pair of stampings I I are positioned in mirror image fashion so that the strip-like portions I3 of the opposed stampings I I butt against each other. The half cylinders of the opposed sheets II are then in register so as to form a tubular body I5. The tabs I2 are bent outward from the plane of the original sheet of material so as to provide more evenly spaced heat conductive members. The tabs I2 may also be twisted in the manner shown in Figures 4 and 11 to partially simulate spiral finning on the radiator.
The modified form of radiator shown in Figures 4, 5 and 6 is formed of a single stamping 2| of heat conductive material. A portion of the stamping ZI along one longitudinal edge has formed therein a plurality of tabs 22. These tabs 22 may be formed by a plurality of slots 22a cut in sheet 2| transverse to the edge thereof.
A longitudinal strip-like portion 23 is provided adjacent the base of the set of tabs 22. Another strip-like portion 24 is provided adjacent the other longitudinal edge of stamping 2|. These strip- like portions 23 and 24 are adapted to be secured to each other, preferably by welding.
A central portion in stamping 2| between the pair of strip- like portions 23 and 24 is bent so as to form a tubular body 26. The tabs 22 are twisted in the manner shown in Figures 4 to 6 so as to partially simulate spiral finning on the radiator.
The modified form of radiator shown in Figures 7 and 8 is formed by a pair of stampings 3i of conductive material. Only one longitudinal edge of each stamping 3| has formed therein a plurality of tabs 32. A longitudinal strip-like portion 33 is provided adjacent the base of the set of tabs 32. Another strip-like portion 34 is provided adjacent the other longitudinal edge of each stamping 3|. A central portion in stamping 3| between the pair of striplike portions 33 and 34 is rolled to the form of a half cylinder as shown in Figure 8. The pair of stampings 3! are positioned so that the two half cylinder sections form a tubular body 36. In that position the tabs 32 extend in opposite directions from the sides of tubular body 36.
The tabs 32 in stamping 3| are formed by stamping out the material between the tabs 32. The tabs 32 in any set of tabs are then spaced from each other. The width of each stamped out portion 31 between the tabs 32 is substantially equal to the width of each tab 32.
The modified form of radiator shown in Figures 9 and 10 is formed by a pair of stamping-s of heat conductive material. Both longitudinal edges of each stamping has formed therein a plurality of tabs 42. The tabs 42 are spaced from each other a distance substantially equal to the width of a tab 42. In this modification the tabs 42 on one edge of each stamping extend alternately with respect to the tabs on the opposite edge of that stamping. Thus, for any tab 42 the edge directly opposite on that stamping has a stamped out portion 41 and vice versa. Strip- like portions 43 and 44, and a half cylinder section 45 are also provided in each stamping. The two half cylinder sections 45 are in register in the assembled radiator to form a tubular body 45.
In the assembly of the radiator, each stamping is aligned relative to the opposite stamping so that the tabs 42 on one stamping are adjacent the stamped out portions 4'! of the opposite stamping and vice versa. The tabs 42 may be diverging as shown in Figure 10 in a manner similar to the form shown in Figures 2 to 3. As shown in Figures 11 and 12 the tabs 42 may be twisted to partially simulate spiral finning on a radiator. Since the fins 42 on adjacent stampings extend alternately, the twisted fins 42 are aligned to better simulate the spiral fins on a radiator.
In Figures 5 and 11 a few air flow arrows are shown to illustrate the manner in which the twisted fins deflect air that is rising past the fin type radiator.
Referring to Figure 13, a fin type radiator of the form shown in Figure 1 is shown with a heating element of a well known type installed therein. The heating element consists of an electrical resistance element 51 which is completely enclosed in a non-electrical conductor 52. This nonelectrical conductor 52 usually is clay or some other ceramic material.
While there has been shown and described a particular embodiment of this invention, it will be obvious to those skilled in the art that various changes and modifications may be made therein Without departing from the invention and, therefore, it is intended in the appended claims to cover all such changes and modifications as fall within the true spirit and scope of the invention.
What I claim as new and desire to secure by Letters Patent of the United States is:
1. A fin type radiator comprising a pair of elongated sheets of conductive material adapted to mate with each other, each sheet having a set of similar tabs formed in a longitudinal end portion thereof, the tabs of each said set being spaced from each other a distance substantially equal to the width of a tab at its base, each said sheet forming a wall portion of an elongated hollow member, said sheets being joined together to form an elongated hollow member having fins extending therefrom, the tabs on one sheet being positioned alternately with the tabs on the other sheet so that each tab is longitudinally positioned between an adjacent pair of tabs in the opposite sheet, said tabs being twisted, and the extended end of each tab being aligned with the end of one of the adjacent tabs on the other sheet to form portions of spiral fins.
2. A fin type radiator as set forth in claim 1 wherein said tabs are formed in both longitudinal end portions of both sheets, whereby portions of spiral fins are formed along the length of said hollow member on opposite sides thereof.
EDWARD C. "SCHMID.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,608,905 Murray et al Nov. 30, 1926 2,107,031 Evans Feb. 1, 1938 2,434,519 Raskin Jan. 13, 1948 FOREIGN PATENTS Number Country Date 794,515 France Dec. 12, 1935
US142503A 1950-02-04 1950-02-04 Fin type radiator Expired - Lifetime US2646972A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3009045A (en) * 1960-09-12 1961-11-14 Dominion Electrohome Ind Ltd Heating element
US3031171A (en) * 1960-03-22 1962-04-24 Robbins & Myers Radiation fin structure for rod-like heating elements
US3068905A (en) * 1960-03-28 1962-12-18 Westinghouse Electric Corp Extended surface fins for heat exchange tubes
US3405760A (en) * 1966-03-17 1968-10-15 Chemetron Corp Heat exchange apparatus and method of making same
US3462990A (en) * 1963-12-23 1969-08-26 Reynolds Metals Co Meshing gear apparatus for making heat exchangers
US3578952A (en) * 1969-06-05 1971-05-18 Escoa Fintube Corp Tubular electrical heating element with a segmented helical fin
US3659326A (en) * 1970-02-02 1972-05-02 Olin Corp Process for preparing heat exchange component
US3912003A (en) * 1973-04-13 1975-10-14 Jean Schrade Heat exchanger
US4352378A (en) * 1979-07-16 1982-10-05 Transelektro Magyar Villamossagi Kulkereskedelmi Vallalat Ribbed construction assembled from sheet metal bands for improved heat transfer
US4543943A (en) * 1982-03-11 1985-10-01 Webasto-Werk W. Baier Gmbh & Co. Heater fired with liquid fuel
US4763726A (en) * 1984-08-16 1988-08-16 Sunstrand Heat Transfer, Inc. Heat exchanger core and heat exchanger employing the same
EP1574803A3 (en) * 2004-02-27 2006-09-06 Marin Camara, Miguel Modular electric radiator
FR2964666A1 (en) * 2010-09-13 2012-03-16 Univ Nantes DEVICE FOR CONTROLLING THE TEMPERATURE OF A DIRECT LIGHTING SOLAR PHOTOBIOREACTOR
KR20210055990A (en) * 2019-11-08 2021-05-18 주식회사 엠티티 Convector of Natural Convection Types

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1608905A (en) * 1924-06-18 1926-11-30 Joseph B Murray Heat-conducting tube and method of making the same
FR794515A (en) * 1934-09-26 1936-02-19 Kuehl U Kraftmaschinen G M B H heat exchanger
US2107031A (en) * 1936-04-29 1938-02-01 Gordon M Evans Heat transferring tube structure
US2434519A (en) * 1942-04-18 1948-01-13 Raskin Walter Heat exchange conduit with a spiral fin having a capillary groove

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1608905A (en) * 1924-06-18 1926-11-30 Joseph B Murray Heat-conducting tube and method of making the same
FR794515A (en) * 1934-09-26 1936-02-19 Kuehl U Kraftmaschinen G M B H heat exchanger
US2107031A (en) * 1936-04-29 1938-02-01 Gordon M Evans Heat transferring tube structure
US2434519A (en) * 1942-04-18 1948-01-13 Raskin Walter Heat exchange conduit with a spiral fin having a capillary groove

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031171A (en) * 1960-03-22 1962-04-24 Robbins & Myers Radiation fin structure for rod-like heating elements
US3068905A (en) * 1960-03-28 1962-12-18 Westinghouse Electric Corp Extended surface fins for heat exchange tubes
US3009045A (en) * 1960-09-12 1961-11-14 Dominion Electrohome Ind Ltd Heating element
US3462990A (en) * 1963-12-23 1969-08-26 Reynolds Metals Co Meshing gear apparatus for making heat exchangers
US3405760A (en) * 1966-03-17 1968-10-15 Chemetron Corp Heat exchange apparatus and method of making same
US3578952A (en) * 1969-06-05 1971-05-18 Escoa Fintube Corp Tubular electrical heating element with a segmented helical fin
US3659326A (en) * 1970-02-02 1972-05-02 Olin Corp Process for preparing heat exchange component
US3912003A (en) * 1973-04-13 1975-10-14 Jean Schrade Heat exchanger
US4352378A (en) * 1979-07-16 1982-10-05 Transelektro Magyar Villamossagi Kulkereskedelmi Vallalat Ribbed construction assembled from sheet metal bands for improved heat transfer
US4543943A (en) * 1982-03-11 1985-10-01 Webasto-Werk W. Baier Gmbh & Co. Heater fired with liquid fuel
US4763726A (en) * 1984-08-16 1988-08-16 Sunstrand Heat Transfer, Inc. Heat exchanger core and heat exchanger employing the same
EP1574803A3 (en) * 2004-02-27 2006-09-06 Marin Camara, Miguel Modular electric radiator
FR2964666A1 (en) * 2010-09-13 2012-03-16 Univ Nantes DEVICE FOR CONTROLLING THE TEMPERATURE OF A DIRECT LIGHTING SOLAR PHOTOBIOREACTOR
WO2012035027A1 (en) * 2010-09-13 2012-03-22 Universite De Nantes Device for controlling the temperature of a direct-illumination solar photobioreactor
KR20210055990A (en) * 2019-11-08 2021-05-18 주식회사 엠티티 Convector of Natural Convection Types
KR102256203B1 (en) 2019-11-08 2021-05-27 주식회사 엠티티 Convector of Natural Convection Types

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