US3703815A - Double fin cooling coil with condensate director - Google Patents
Double fin cooling coil with condensate director Download PDFInfo
- Publication number
- US3703815A US3703815A US183880A US3703815DA US3703815A US 3703815 A US3703815 A US 3703815A US 183880 A US183880 A US 183880A US 3703815D A US3703815D A US 3703815DA US 3703815 A US3703815 A US 3703815A
- Authority
- US
- United States
- Prior art keywords
- fins
- condensate
- downstream
- series
- fin
- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/067—Evaporator fan units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
Definitions
- ABSTRACT A compression cycle refrigeration system for cooling air is shown wherein the evaporator heat exchanger coil has two sets of fins, one set of fins being arranged above the other.
- the lower downstream comers of the fins of the upper set are folded over on the next adjacent fin to thereby form a series of condensate directors to cause condensate running down the downstream margins of the upper fins to transfer and adhere to the-lower fins with reduced entrainment of condensate in the air passing over the heat exchange coil.
- Refrigeration systems employed for air conditioning usually employ a fin-and-tube heat exchanger for cooling the air. Refrigerant if conducted through the tubes to thereby cool the fins. In cooling the air below the dew point temperature, condensate normally forms on and adheres to the fins and runs down along the faces of the fins to a collection area. Where the heat exchanger employs two sets of fins, one above the other, a larger amount of condensate becomes entrained in the air stream passing over the heat exchanger. This phenomenon is present even if the upper set is in contact with the lower set of fins.
- the instant invention relates to apparatus for the transfer of condensate from the upper to the lower set of fins of a heat exchanger having upper and lower sets of fins. This is accomplished by folding the lower downstream corners of each of the fins of the upper set over onto the next adjacent fin. The folded portion functions as a condensate director.
- the condensate passing downwardly in the lower downstream portion of the upper set of fins is directed upstream whereby the condensate leaves the upper set of fins somewhat upstream of the downstream face of the upper set of fins. From this upstream position the condensate may transfer and adhere to the upper portions of the lower fins without passing beyond the downstream face of the set of lower fins and becoming entrained in the air stream.
- the fin folds also may tend to concentrate the condensate sufficiently to substantially block air movement at the area of transfer.
- this invention involves heat exchange apparatus comprising: a first series of substantially parallel horizontally spaced vertically extending heat exchange plate first fins adapted to be disposed in an air stream and having generally coextensive generally vertically extending downstream edges; a second series of substantially parallel horizontally spaced vertically extending heat exchange plate second fins adapted to be disposed in the air stream and having coextensive generally vertically extending downstream edges; said second series of second fins being disposed immediately below said first series of first fins; a plurality of tubes extending through and in heat exchange relationship with said first and second fins and adapted to conduct a cooling fluid to cool said first and second fins to a temperature below the dew point of the air stream whereby condensate is formed on the fins and caused to pass downwardly along the downstream margins of said first and second fins adjacent the downstream edges thereof; and means associated with the lower portions of said first fins adjacent the downstream edges thereof for directing condensate in an upstream direction whereby said condensate upon leaving said first fins transfers to
- FIG. 1 is a schematic of a refrigeration system incorporating my invention.
- FIG. 2 is a side elevation of the downstream face of the evaporator heat exchanger coil shown in FIG. 1;
- FIG. 3 is a horizontal section of the evaporator heat exchanger coil of FIG. 1 taken at line 3-3 of FIG. 1;
- FIG. 4 is an enlarged detail of the heat exchanger coil shown in FIG. 2; and I FIG. 5 is an enlarged section of a detail of the heat exchanger coil taken at line 5-5 of FIG. 1.
- a refrigeration circuit having a refrigerant compressor 10, a refrigerant condenser 12 connected to the discharge of compressor 10, a refrigerant expansion valve 14 connected to the outlet of condenser 12, and a refrigerant evaporator 16 connected to receive liquid refrigerant from valve 14 and to discharge vaporized refrigerant to the inlet of compressor 10.
- a fan 18 is arranged to pass moisture containing air through evaporator 16 from the upstream face 20 to the downstream face 22.
- a shroud 24 may be provided to direct the air from fan 18 to evaporator 16.
- a condensate drain pan 26 is provided to collect condensate drained from evaporator 16.
- Evaporator 16 has a first series of generally planar metallic upper fins 28 of rectangular configuration disposed in spaced face-to-face relationship and a second series of generally planar metallic lower fins 30 of rectangular configuration disposed in spaced faceto-face relationship. The second fins are immediately below the first fins and may be contiguous with some of the first fins. Evaporator 16 also includes a plurality of tubes 32 traversing through the fins 28 and'30 in heat exchange relationship therewith for conducting refrigerant from valve 14. Tubes 32 are connected in series by U-bend elements 34 as required to complete the refrigerant circuit. The fins 28 and 30 and tubes 32 'of evaporator 16 are supported in a rectangularly shaped frame 35 formed of channel members.
- each of fins 28 has been folded over a similar fold on the next adjacent fin. Substantially all of the upper fins are thus folded.
- the crease between the fold portion and the main portion of the fin extends upwardly and downstream and makes an angle between l35 and 170 with the downstream edge of the fin. This angle is preferably about and the fold portion has a height of about seven-eighths inch and a horizontal depth of about three-eighths inch.
- the fold portion is almost normal to the main portion of the fin as will be seen from FIG. 5.
- the fold portions are preferably made by passing an appropriate bending tool along the lower downstream comer of the upper series of fins after they have been assembled with the tubes 32. However, it is contemplated that such folds may be made in the individual fins prior to assembly with tubes 32. It is also contemplated that the desired dimensions herein given will vary somewhat with expected air velocity and fin spac- During operation of the refrigeration system, refrigerant is passed serially through compressor 10, condenser 12, expansion valve 14, and evaporator 16 while moistureladen air is passed by fan 18 through evaporator 16. Condensate forms upon fins 28 and 30 of the evaporator The movement of air over the fins tends to push thecondensate to the downstream margins while gravity tends to cause the condensate to move downwardly.
- the condensate passing downwardly along the downstream margins of fins 28 is directly forwardly as it passes downwardly along fold portions 36. From this forward position condensate leaves the upper fins 28 to transfer to the lower fins 30 whereupon such condensate may continue its downward progress into drain pan 26.
- Folds 36 thus function as condensate bridging means to allow the free passage of condensate from the upper series of fins to the lower series of fins with reduced condensate entrainment in the air stream.
- Heat exchange apparatus comprising: a first series of substantially parallel horizontally spaced vertically extending heat exchange plate first fins adapted to be disposed in an air stream and having generally coextensive generally vertically extending downstream edges; a second series of substantially parallel horizontally spaced vertically extending heat exchange plate second fins adapted to be disposed in the air stream and having generally coextensive generally vertically extending downstream edges; said second series of second fins being disposed immediately below said first series of first fins; a plurality of tubes extending through and in heat exchange relationship with said first and second fins and adapted to conduct a cooling fluid to cool said first and second fins to a temperature below the dew point of the air stream whereby condensate is formed on the fins and caused to pass downwardly along the downstream margins of said first and second fins adjacent the downstream edges thereof; and means associated with the lower portions of said first fins adjacent the downstream edges thereof for directing condensate in an upstream direction whereby said condensate upon leaving said first fins transfers to said second fin
- first and second fins are rectangular plates having a generally vertically extending major axes.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
Abstract
Description
Claims (9)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18388071A | 1971-09-27 | 1971-09-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3703815A true US3703815A (en) | 1972-11-28 |
Family
ID=22674693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US183880A Expired - Lifetime US3703815A (en) | 1971-09-27 | 1971-09-27 | Double fin cooling coil with condensate director |
Country Status (2)
Country | Link |
---|---|
US (1) | US3703815A (en) |
CA (1) | CA955584A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3923098A (en) * | 1974-02-14 | 1975-12-02 | Singer Co | Forced air heat exchange unit with improved condensate removal construction |
US20130205823A1 (en) * | 2010-10-27 | 2013-08-15 | Takayuki Yagyu | Air conditioner |
US20130247600A1 (en) * | 2012-03-22 | 2013-09-26 | B/E Aerospace, Inc. | Vehicle Refrigeration Equipment Having a Vapor Cycle System |
EP2813778A1 (en) * | 2013-06-10 | 2014-12-17 | Robert Bosch Gmbh | Heat transfer device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2046968A (en) * | 1934-01-08 | 1936-07-07 | Cool Rite Products Corp | Cooling system |
US2251649A (en) * | 1939-01-24 | 1941-08-05 | John C Wichmann | Air conditioning dehumidifier |
US2667041A (en) * | 1948-10-27 | 1954-01-26 | Ray M Henderson | Evaporator and drip catcher arrangement for refrigerating apparatus |
US2876631A (en) * | 1956-05-24 | 1959-03-10 | Pierce John B Foundation | Fin structure |
-
1971
- 1971-09-27 US US183880A patent/US3703815A/en not_active Expired - Lifetime
-
1972
- 1972-09-13 CA CA151,653A patent/CA955584A/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2046968A (en) * | 1934-01-08 | 1936-07-07 | Cool Rite Products Corp | Cooling system |
US2251649A (en) * | 1939-01-24 | 1941-08-05 | John C Wichmann | Air conditioning dehumidifier |
US2667041A (en) * | 1948-10-27 | 1954-01-26 | Ray M Henderson | Evaporator and drip catcher arrangement for refrigerating apparatus |
US2876631A (en) * | 1956-05-24 | 1959-03-10 | Pierce John B Foundation | Fin structure |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3923098A (en) * | 1974-02-14 | 1975-12-02 | Singer Co | Forced air heat exchange unit with improved condensate removal construction |
US20130205823A1 (en) * | 2010-10-27 | 2013-08-15 | Takayuki Yagyu | Air conditioner |
US20130247600A1 (en) * | 2012-03-22 | 2013-09-26 | B/E Aerospace, Inc. | Vehicle Refrigeration Equipment Having a Vapor Cycle System |
JP2015517078A (en) * | 2012-03-22 | 2015-06-18 | ビーイー・エアロスペース・インコーポレーテッド | Vehicle refrigeration apparatus having a steam cycle system |
US10488084B2 (en) | 2012-03-22 | 2019-11-26 | B/E Aerospace, Inc. | Vehicle refrigeration equipment having a vapor cycle system |
EP2813778A1 (en) * | 2013-06-10 | 2014-12-17 | Robert Bosch Gmbh | Heat transfer device |
Also Published As
Publication number | Publication date |
---|---|
CA955584A (en) | 1974-10-01 |
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Owner name: TRANE COMPANY, THE Free format text: MERGER;ASSIGNOR:A-S CAPITAL INC. A CORP OF DE;REEL/FRAME:004334/0523 |
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Owner name: TRANE COMPANY THE Free format text: MERGER;ASSIGNORS:TRANE COMPANY THE, A CORP OF WI (INTO);A-S CAPITAL INC., A CORP OF DE (CHANGED TO);REEL/FRAME:004372/0370 Effective date: 19840224 Owner name: AMERICAN STANDARD INC., A CORP OF DE Free format text: MERGER;ASSIGNORS:TRANE COMPANY, THE;A-S SALEM INC., A CORP. OF DE (MERGED INTO);REEL/FRAME:004372/0349 Effective date: 19841226 |
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Owner name: A-S CAPITAL INC., A CORP OF DE Free format text: MERGER;ASSIGNOR:TRANE COMPANY THE A WI CORP;REEL/FRAME:004432/0765 Effective date: 19840224 |
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Owner name: A-S CAPITAL INC. Free format text: MERGER;ASSIGNOR:TRANE COMPANY THE;REEL/FRAME:004476/0376 Effective date: 19840224 |
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Owner name: AMERICAN STANDARD INC., A CORP OF DELAWARE Free format text: MERGER;ASSIGNORS:TRANE COMPANY THE;A-S SALEM INC.;REEL/FRAME:004508/0684 Effective date: 19841226 |
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Owner name: BANKERS TRUST COMPANY, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:TRANE AIR CONDITIONING COMPANY, A DE CORP.;REEL/FRAME:004905/0213 Effective date: 19880624 Owner name: BANKERS TRUST COMPANY, 4 ALBANY STREET, 9TH FLOOR, Free format text: SECURITY INTEREST;ASSIGNOR:TRANE AIR CONDITIONING COMPANY, A DE CORP.;REEL/FRAME:004905/0213 Effective date: 19880624 Owner name: BANKERS TRUST COMPANY Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN STANDARD INC., A DE. CORP.,;REEL/FRAME:004905/0035 Effective date: 19880624 |
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Owner name: CHEMICAL BANK, AS COLLATERAL AGENT, NEW YORK Free format text: ASSIGNMENT OF SECURITY INTEREST;ASSIGNOR:BANKERS TRUST COMPANY, AS COLLATERAL TRUSTEE;REEL/FRAME:006565/0753 Effective date: 19930601 |
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Owner name: AMERICAN STANDARD, INC., NEW JERSEY Free format text: RELEASE OF SECURITY INTEREST (RE-RECORD TO CORRECT DUPLICATES SUBMITTED BY CUSTOMER. THE NEW SCHEDULE CHANGES THE TOTAL NUMBER OF PROPERTY NUMBERS INVOLVED FROM 1133 TO 794. THIS RELEASE OF SECURITY INTEREST WAS PREVIOUSLY RECORDED AT REEL 8869, FRAME 0001.);ASSIGNOR:CHASE MANHATTAN BANK, THE (FORMERLY KNOWN AS CHEMICAL BANK);REEL/FRAME:009123/0300 Effective date: 19970801 |
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Owner name: AMERICAN STANDARD, INC., NEW JERSEY Free format text: RELEASE OF SECURITY INTEREST;ASSIGNOR:CHASE MANHATTAN BANK, THE (FORMERLY KNOWN AS CHEMICAL BANK);REEL/FRAME:008869/0001 Effective date: 19970801 |