US2896426A - Heat exchange construction - Google Patents
Heat exchange construction Download PDFInfo
- Publication number
- US2896426A US2896426A US643426A US64342657A US2896426A US 2896426 A US2896426 A US 2896426A US 643426 A US643426 A US 643426A US 64342657 A US64342657 A US 64342657A US 2896426 A US2896426 A US 2896426A
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- Prior art keywords
- heat exchange
- condensate
- lips
- fin
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
- F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
-
- 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
- Y10S165/913—Condensation
Definitions
- This invention relates to an improved finned tube heat exchanger construction which will facilitate the drainage of condensate which forms on the exchanger. This invention also relates to a method of making the improved heat exchanger.
- the present invention relates to an improved heat exchanger containing condensate disposal means and comprises a conduit for the passage of a heat exchange medium.
- Fin elements are affixed to the outside of the conduit and are adapted to be contacted by a gas containing moisture. Certain portions of the fin elements are at a higher level than other portions. Lips are formed on the lower portions of adjacent fin elements, and these lips are bent downwardly so that each lip extends toward the lip of an adjacent fin element. Thus condensate which forms on the fins will flow from the higher portion thereof to the lower portion wherein the lips are located. Because each lip extends toward an adjacent lip, a path is provided for the condensate to flow down these lips. In this. manner the hanging up of condensate on the heat exchanger surfaces is avoided to a great degree.
- Figure l is a fragmentary view of a heat exchanger tube having the condensate disposal construction of the present invention.
- Figure 2 is a view taken along line IIII of Figure 1;
- Figure 3 is a modification of the structure shown in Figure 1;
- FIG. 4 is a further modification of the present invention.
- Figure 5 illustrates the finned heat exchange tubes inserted into a heat exchanger construction.
- FIG. 1 depicts a tube for the passage of a cooling medium.
- numeral .10 depicts a tube for the passage of a cooling medium.
- Afiixed to outside of. tube 10 is a helical fin 11.
- At every convolution fin 11 is slitted as at 12 and a portion of fin 11 immediately adjacent each slit,is formed into a downwardly extending lip 13.
- the lower portion 14 of each lip 13 may be in contact, with the upper portion of the lip which is immediately below it.
- the finned heat exchange tube 10 of the above described construction is adapted to be utilized with the axis thereof extending in a substantially vertical direction. It can readily be seen that as condensate forms on each convolution of the fin between the adjacent lips, this moisture will fiow downwardly along said fin 11 until lip 13 is reached. The condensate will then flow from each lip directly to the lip below it. Thus prolonged contact of the condensate with the fin 11 is avoided.
- FIG 3 a modified construction of the structure of Figure 1 is shown.
- the structure of this modification is similar to that shown in Figure l in all respects except in the shape of the lips.
- Lips 15 are formed by a suitable deforming operation into the shape of a spout.
- the superposed spouts 15 are in contact with each other at points 16. This construction functions generally in the same manner as that of the Figure 1.
- fluid conducting tube 17 has a plurality of annular discs 18 placed on the outside thereof to facilitate the heat exchange function.
- Spouts 19 are formed by any suitable metal deforming operation, such as drawing, so that a portion of the lower edge 20 of each spout is in contact with the upper edge of the spout directly below it.
- This construction operates most satisfactorily in applications where tube 17 or the discs 18 are tilted at an angle to the vertical so that the upper borders of spouts 19 are at the lowermost portions of the discs 18 on which they are formed.
- any condensate forming on the discs 18 will run down toward the spouts 19 and then from one spout to another till the bottom of the heat exchanger is reached.
- heat exchanger tubing made in accordance with any of the foregoing described ways is shown inserted into a heat exchange unit 21 in the form of a serpentine coil.
- the air flow is from the direction remote from where the lips are formed.
- the fluid conducting tube 10 is directly between the point from which the air is coming and the lips.
- the lips do not form a barrier for the air flow so as to create unnecessary turbulence.
- the lip portions of the heat exchanger can be placed in any suitable position to obtain the desired results.
- the modification of Figure 1 can be made so that both portions of the fin adjacent to slit 12 may be formed downwardly into lips rather than just one portion -14 as shown.
- a heat exchange member comprising a substantially vertically extending tube, a helical fin on the outside of said tube, and lips on'said helical fin for conducting condensate therefrom.
- a heat exchange member comprising a substantially vertically extending tube, a helical fin on the outside of said tube, lips on said helical fin at each convolution thereof, each lip being in contact with an adjacent lip.
- a heat exchange member according to claim 1, in which lips are provided on adjacent convolutions of the helical fin in superposed stacked relationship.
- a heat exchange-member comprising a conduit for the passage of a heat exchange medium, fin elements on said conduit with portions thereof at a higher level than other portions and lips on said fin elements for conducting condensate away from said fin elements, said lips being formed on adjacent fin elements in superposed stacked relationship, each lip being in contact with an adjacent lip.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
July 28, 1959 R. W. AYLING HEAT EXCHANGE CONSTRUCTION Filed March 1, 1957 air flow FIG. 4
INVENTOR.
ROBERT W. AY LING.
ATTORNEY.
United States Patent 9 HEAT EXCHANGE CONSTRUCTION Robert W. Ayliug, Syracuse, N.Y., assignor to Carrier Corporation, Syracuse, N.Y., a corporation of Delaware Application March 1, 11957, Serial No. 643,426
Claims. (Cl. 62-285) This invention relates to an improved finned tube heat exchanger construction which will facilitate the drainage of condensate which forms on the exchanger. This invention also relates to a method of making the improved heat exchanger.
In many applications where a cooling medium is passed through a heat exchanger and where air or another gas comes into contact with the outside of the heat exchanger, the formation of condensate on the external surfaces of a heat exchanger often reduces the efliciency thereof because this condensate acts as an insulating layer which lessens the heat transfer characteristics. Furthermore, when heat exchange members are used in a refrigeration circuit, liquid which forms on the coil being defrosted tends to adhere to its surfaces. The stagnation of this moisture is objectionable because it not only increases the relative humidity of the enclosure being cooled when the refrigeration circuit is placed on the cooling cycle, but also tends to freeze into a solid sheet of ice which acts as an insulating layer to decrease the efiiciency of the heat transfer operation. It is therefore desirable to dispose of this condensate in a simple and efficient manner. It is for this purpose that the present invention is contemplated.
It is the chief object of this invention to provide an improved heat exchanger construction which will readily facilitate the disposal of condensate which forms there- It is another object of this invention to provide an improved heat exchanger construction which facilitates the removal of condensate from its surface in a simple and eflicient manner and which can be constructed at a low cost.
It is still. a further object of this invention to provide a condensate disposal means for a heat exchanger which will not interfere with proper operation of the heat exchanger. Other objects and attendant advantages of the present invention will readily be perceived hereafter.
The present invention relates to an improved heat exchanger containing condensate disposal means and comprises a conduit for the passage of a heat exchange medium. Fin elements are affixed to the outside of the conduit and are adapted to be contacted by a gas containing moisture. Certain portions of the fin elements are at a higher level than other portions. Lips are formed on the lower portions of adjacent fin elements, and these lips are bent downwardly so that each lip extends toward the lip of an adjacent fin element. Thus condensate which forms on the fins will flow from the higher portion thereof to the lower portion wherein the lips are located. Because each lip extends toward an adjacent lip, a path is provided for the condensate to flow down these lips. In this. manner the hanging up of condensate on the heat exchanger surfaces is avoided to a great degree. This invention will be more readily understood when the following portions of the specification are read in conjunction with the accompanying drawings wherein:
ice
Figure l is a fragmentary view of a heat exchanger tube having the condensate disposal construction of the present invention;
Figure 2 is a view taken along line IIII of Figure 1;
Figure 3 is a modification of the structure shown in Figure 1;
Figure 4 is a further modification of the present invention; and
Figure 5 illustrates the finned heat exchange tubes inserted into a heat exchanger construction.
Reference is now made to Figure 1, wherein numeral .10 depicts a tube for the passage of a cooling medium. Afiixed to outside of. tube 10 is a helical fin 11. At every convolution fin 11 is slitted as at 12 and a portion of fin 11 immediately adjacent each slit,is formed into a downwardly extending lip 13. As shown in Figure 1, the lower portion 14 of each lip 13 may be in contact, with the upper portion of the lip which is immediately below it.
The finned heat exchange tube 10 of the above described construction is adapted to be utilized with the axis thereof extending in a substantially vertical direction. It can readily be seen that as condensate forms on each convolution of the fin between the adjacent lips, this moisture will fiow downwardly along said fin 11 until lip 13 is reached. The condensate will then flow from each lip directly to the lip below it. Thus prolonged contact of the condensate with the fin 11 is avoided.
In Figure 3, a modified construction of the structure of Figure 1 is shown. The structure of this modification is similar to that shown in Figure l in all respects except in the shape of the lips. Lips 15 are formed by a suitable deforming operation into the shape of a spout. The superposed spouts 15 are in contact with each other at points 16. This construction functions generally in the same manner as that of the Figure 1.
In Figure 4, a still further modification is shown wherein fluid conducting tube 17 has a plurality of annular discs 18 placed on the outside thereof to facilitate the heat exchange function. Spouts 19 are formed by any suitable metal deforming operation, such as drawing, so that a portion of the lower edge 20 of each spout is in contact with the upper edge of the spout directly below it. This construction operates most satisfactorily in applications where tube 17 or the discs 18 are tilted at an angle to the vertical so that the upper borders of spouts 19 are at the lowermost portions of the discs 18 on which they are formed. Thus any condensate forming on the discs 18 will run down toward the spouts 19 and then from one spout to another till the bottom of the heat exchanger is reached.
In Figure 5, heat exchanger tubing made in accordance with any of the foregoing described ways is shown inserted into a heat exchange unit 21 in the form of a serpentine coil. It can readily be seen from Figures 2 and v5 that the air flow is from the direction remote from where the lips are formed. In other words, the fluid conducting tube 10 is directly between the point from which the air is coming and the lips. Thus the lips do not form a barrier for the air flow so as to create unnecessary turbulence. However, if a certain amount of turbulence is desired, the lip portions of the heat exchanger can be placed in any suitable position to obtain the desired results. It is to be also noted that the modification of Figure 1 can be made so that both portions of the fin adjacent to slit 12 may be formed downwardly into lips rather than just one portion -14 as shown.
It can thus be seen that I have described a simple and eflicient condensate disposal arrangement for a finned heat exchange tube which can be fabricated at extremely low cost and with a small amount of labor.
While I have described preferred embodiments of the invention it will be understood that the invention is not limited thereto since it may be otherwise embodied within the scope of the following claims.
I claim: a v
1. A heat exchange member comprising a substantially vertically extending tube, a helical fin on the outside of said tube, and lips on'said helical fin for conducting condensate therefrom.
2. A heat exchange member as set forth in claim 1 wherein said lips are in the form of spouts.
3. A heat exchange member comprising a substantially vertically extending tube, a helical fin on the outside of said tube, lips on said helical fin at each convolution thereof, each lip being in contact with an adjacent lip.
4. A heat exchange member, according to claim 1, in which lips are provided on adjacent convolutions of the helical fin in superposed stacked relationship.
5. A heat exchange-member comprising a conduit for the passage of a heat exchange medium, fin elements on said conduit with portions thereof at a higher level than other portions and lips on said fin elements for conducting condensate away from said fin elements, said lips being formed on adjacent fin elements in superposed stacked relationship, each lip being in contact with an adjacent lip.
References Cited in the file of this patent UNITED STATES PATENTS 1,250,884 Hubbert Dec. 18, 1917 2,286,271 Higham June 16, 1942 15 2,427,200 Dreier Sept. 9, 1947 FOREIGN PATENTS 149,251 Austria Apr. 10, 1937
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US643426A US2896426A (en) | 1957-03-01 | 1957-03-01 | Heat exchange construction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US643426A US2896426A (en) | 1957-03-01 | 1957-03-01 | Heat exchange construction |
Publications (1)
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US2896426A true US2896426A (en) | 1959-07-28 |
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Family Applications (1)
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US643426A Expired - Lifetime US2896426A (en) | 1957-03-01 | 1957-03-01 | Heat exchange construction |
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Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3025685A (en) * | 1960-02-03 | 1962-03-20 | Arkla Ind | Means for wetting surfaces |
US3089016A (en) * | 1959-08-17 | 1963-05-07 | Ferro Corp | Heating unit |
US3355788A (en) * | 1964-10-20 | 1967-12-05 | Hudson Engineering Corp | A method of sawing slits in finned tubing |
US3367132A (en) * | 1965-09-02 | 1968-02-06 | Weil Mclain Company Inc | Valance type heat exchanger with trough means |
US3759050A (en) * | 1972-02-24 | 1973-09-18 | Modine Mfg Co | Method of cooling a gas and removing moisture therefrom |
US3850236A (en) * | 1973-03-26 | 1974-11-26 | Peerless Of America | Heat exchangers |
US3875997A (en) * | 1970-06-30 | 1975-04-08 | Atomic Energy Authority Uk | Tubular heat transfer members |
FR2342478A1 (en) * | 1976-02-28 | 1977-09-23 | Hisaka Works Ltd | STEAM CONDENSER |
US4094734A (en) * | 1973-10-15 | 1978-06-13 | Henderson Industrial Corporation | Evaporator and treatment of viscous brines |
US4648441A (en) * | 1984-10-30 | 1987-03-10 | U.S. Philips Corporation | Heat exchanger comprising a finned pipe |
US4893481A (en) * | 1988-10-17 | 1990-01-16 | Sullivan John T | Convector tray |
US4993630A (en) * | 1988-03-18 | 1991-02-19 | Ingenieurburo Timmer Gmbh | System for tempering spaces of a building |
EP0854344A2 (en) * | 1997-01-20 | 1998-07-22 | Kabushiki Kaisha Toshiba | Heat exchanger |
US6796374B2 (en) | 2002-04-10 | 2004-09-28 | Dana Canada Corporation | Heat exchanger inlet tube with flow distributing turbulizer |
US20140131010A1 (en) * | 2012-11-12 | 2014-05-15 | Exxonmobil Research And Engineering Company | Condensing air preheater with heat pipes |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1250884A (en) * | 1917-10-04 | 1917-12-18 | Bartholt H Hubbert | Alcohol-extractor for brew-kettles. |
AT149251B (en) * | 1936-02-27 | 1937-04-10 | Wiederaufbau Ind Und Handels G | Heat exchange device for preheating liquids or gases, especially boiler feed water. |
US2286271A (en) * | 1940-03-07 | 1942-06-16 | Universal Cooler Corp | Heat transfer device |
US2427200A (en) * | 1944-06-29 | 1947-09-09 | Servel Inc | Self-draining heat transfer fins |
-
1957
- 1957-03-01 US US643426A patent/US2896426A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1250884A (en) * | 1917-10-04 | 1917-12-18 | Bartholt H Hubbert | Alcohol-extractor for brew-kettles. |
AT149251B (en) * | 1936-02-27 | 1937-04-10 | Wiederaufbau Ind Und Handels G | Heat exchange device for preheating liquids or gases, especially boiler feed water. |
US2286271A (en) * | 1940-03-07 | 1942-06-16 | Universal Cooler Corp | Heat transfer device |
US2427200A (en) * | 1944-06-29 | 1947-09-09 | Servel Inc | Self-draining heat transfer fins |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3089016A (en) * | 1959-08-17 | 1963-05-07 | Ferro Corp | Heating unit |
US3025685A (en) * | 1960-02-03 | 1962-03-20 | Arkla Ind | Means for wetting surfaces |
US3355788A (en) * | 1964-10-20 | 1967-12-05 | Hudson Engineering Corp | A method of sawing slits in finned tubing |
US3367132A (en) * | 1965-09-02 | 1968-02-06 | Weil Mclain Company Inc | Valance type heat exchanger with trough means |
US3875997A (en) * | 1970-06-30 | 1975-04-08 | Atomic Energy Authority Uk | Tubular heat transfer members |
US3759050A (en) * | 1972-02-24 | 1973-09-18 | Modine Mfg Co | Method of cooling a gas and removing moisture therefrom |
US3850236A (en) * | 1973-03-26 | 1974-11-26 | Peerless Of America | Heat exchangers |
US4094734A (en) * | 1973-10-15 | 1978-06-13 | Henderson Industrial Corporation | Evaporator and treatment of viscous brines |
FR2342478A1 (en) * | 1976-02-28 | 1977-09-23 | Hisaka Works Ltd | STEAM CONDENSER |
US4182410A (en) * | 1976-02-28 | 1980-01-08 | Hisaka Works Ltd. | Plate type condenser |
US4648441A (en) * | 1984-10-30 | 1987-03-10 | U.S. Philips Corporation | Heat exchanger comprising a finned pipe |
US4993630A (en) * | 1988-03-18 | 1991-02-19 | Ingenieurburo Timmer Gmbh | System for tempering spaces of a building |
US4893481A (en) * | 1988-10-17 | 1990-01-16 | Sullivan John T | Convector tray |
EP0854344A2 (en) * | 1997-01-20 | 1998-07-22 | Kabushiki Kaisha Toshiba | Heat exchanger |
EP0854344A3 (en) * | 1997-01-20 | 2000-01-26 | Kabushiki Kaisha Toshiba | Heat exchanger |
US6796374B2 (en) | 2002-04-10 | 2004-09-28 | Dana Canada Corporation | Heat exchanger inlet tube with flow distributing turbulizer |
US20140131010A1 (en) * | 2012-11-12 | 2014-05-15 | Exxonmobil Research And Engineering Company | Condensing air preheater with heat pipes |
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