Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3596475 A
Publication typeGrant
Publication dateAug 3, 1971
Filing dateSep 19, 1969
Priority dateSep 19, 1969
Publication numberUS 3596475 A, US 3596475A, US-A-3596475, US3596475 A, US3596475A
InventorsIsaac Berger
Original AssigneeCarrier Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Heat exchanger with improved condensate disposal arrangement
US 3596475 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Paten Inventor AppL No. Filed Patented Assignee Isaac Berger Hacienda Heights, Callfl 859.472

Sept. 19. 1969 Aug. 3. 1971 Carrier Corporation Syracuse, NY.

HEAT EXCHANGER WITH IMPROVED CONDENSATE DISPOSAL ARRANGEMENT ll Claim, 3 Drawing Figs. LLS. Cl 62/235, 62/286. 62/291 llnt.Cl. lFZScl 21/14 Field of Search 62/285. 286, 291

[56] llelereneee fillecl UNITED STATES PATENTS 2,744,393 5/l956 Brugler 62/285 2,822,674 2/1958 5lmmens.. 62/291 2,899,803 8/l959 Paley 62/291 3.299.660 1/1967 Sullivan 62/285 3,306,070 2/l96'7 Herb 62/285 Primary Examiner williarn J. Wye Almrneys- Harry (1. Martin and .l. Raymond Curtin ABSTRACT: A pletc-finnecl coll unit diverges upwardly from the drain pen m an angle of lean than 45 in the direction of the airflow. The lower end of the coil terminates in the pan in close spaced relation to an end well thereof. The pen has a top wall extending from that end wall toward the lower end of the coil. This arrangement provides a sump for the collection of condensate from the coil when the fan coil unit is installed in either the vertical or horizontal peel/lion.

WWW/WW wnwnwnnlwnw ll Wlhllllwllw'w vllllllll/ /Wlllkllllmlllllllll llllllM/llllllllll/lll PATENTED Am; 3l97| 3" 596.475


HEAT EXCHANGER WI'II'I IMPROVED CONDENSATE DISPOSAL ARRANGEMENT BACKGROUND OF THE INVENTION Fan coil units are used as evaporators in air conditioning systems, especially in domestic installations for dispensing chilled air into room areas. Generally. fan coil units are installed in horizontal position. Such units include a coil positioned in a sheet metal cabinet which also contains a blower or the like for creating an airflow through the coil which is supplied with refrigerant or chilled water. A drain pan is arranged below the coil to collect condensation therefrom.

in some instances, it is desirable to install the fan coil unit in vertical position to better provide for the connection of ductwork to the unit. At present, it is the custom to manufacture and stock the units in two types, one for horizontal mounting and the other for vertical mounting. In lieu of stocking two types of complete fan coil units, two different types of drain pans may be produced for assembly into the units on order to provide a desired type of unit.

SUMMARY OF THE INVENTION direction of the airflow from the fan. The lower end of the coil terminates adjacent one end of the pan which is formed with a top wall extending from that end toward the pan whereby the unit, including the pan, is installed in vertical position. A sump is provided for collecting the condensation from the coil.

' BRIEF DESCRIPTION OF THE DRAWINCifi FIG. ii is a view illustrating the fan coil unit in horizontal position with a sidewall of the cabinet and the drain pan removed;

H6. 2 is a sectional view taken on line li-li of FIG. I; and

FIG. 3 is a view similar to FIG. 1 illustrating the unit in vertical position.

DESCRIPTION OF THE PREFERRED EMBODIMENT The unit comprises an open-ended cabinet having a bottom wall 10, sidewalls 11, and a top wall 12. Conventionally, insu lating material 13 is attached to the inner surfaces of the cabinet walls. A motor-driven blower fan 15 is mounted in one end of the cabinet and is effective to create an airflow in a direction lengthwise through the cabinet.

A fan coil unit 1'7 is mounted in the cabinet intermediate the fan 15 and the opposite end of the cabinet. The coil unit con sists of a multiplicity of tubes extending transversely of the cabinet and connected at their ends by headers 21. A series of thin metallic plates 23 are apertured for mounting on the tubes 20 to effectively increase the heat transfer. The coil unit 17 is supported in the cabinet by brackets 2"! and inclines up wardly from a drain pan mounted in the cabinet contiguous to the bottom wall it). The inclination of the coil unit 1'? is less than 45 to the cabinet bottom wall 10. This inclination of the coil unit is advantageous in that the height of the unit, when mounted horizontally, is minimized which allows installation of the unit in sofi'it areas over living spaces with no additional overall height in single or multiple-story buildings. Another advantage in mounting the coil unit ii? at an angle of less than 45 to the cabinet wall lit) is that when the unit is mounted in vertical position as shown in FIG. 3, the moisture will gravitate down the tin plates 23 without dripping off the unit, and the moisture will be discharged into the drain pan 30.

The lower end of the fan coil unit terminates in the drain pan .30 adjacent the end wall 33 of the pan. The pan is also formed with atop wall 35 which extends from the end wall 33 toward the lower end of the coil unit 1'7. (See FIG. 11.) With this arrangement, when the unit is mounted vertically as in FIG. 3. the top wall at then in vertical position forms in conjunction with the end wall Lid, and contiguous portion of the bottom wall 3'7 of the pan, a sump for the collection of condensate from the coil unit. As shown in FlCi. ll, this sump por tion of the pan is formed with a primary drainage outlet located in proximity to the end wall 33 and the bottom wall 3'7. The pen is also formed with a secondary drainage outlet ill. The drainage outlets till, all are formed in a sidewall d3 of the pan.

The secondary outlet at is located in spaced relation to the end wall 33 and in proximity to the inner edge of the top wall 35. Accordingly, the drainage outlet dll is located above the outlet as with the unit disposed horizontally as in Fit}. 1 and also above the drainage outlet ill when the unit is installed in vertical position (FIG. Ii). The outlets to, il are connected to a suitable drain and the outlet ll is connected in such manner that any drainage from it is visible and serves as an indication that the primary drain d0 has become plugged. This arrange ment is of importance in view of the fact that these fan coil units are often mounted in ceiling structures in homes, and it is accordingly important that the sump portion of the pan does not overflow.


ii. A fan coil structure for use in air conditioning systems comprising a cabinet open at the ends and having bottom, side, and top walls; means for creating an airflow through said cabinet from end to end; a drain pan mounted in said cabinet contiguous to the bottom wall thereof and extending in a direction lengthwise of the cabinet, said pan being formed with bottom. side, and end walls; a plate-finned coil unit mounted above said drain pan and inclining upwardly therefrom at an angle of less than to the horizontal and in the direction of said airflow. the lower end of said coil unit terminnting in said pan and spaced in proximity to one end wall thereof, said pan having a top wall extending outwardly from the upper edge of said one end wall along the upper edges of said sidewalls toward the lower end of said coil and forming in conjunction with the contiguous portions of the pan a drainage sump portion when said cabinet is disposed in vertical position; and a drain aperture formed in said sump portion contiguous to the bottom wall of said pan and said one end wall thereof. and a second drain aperture located in a sidewall of said pan in proximity to the outer edge of said top wall.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2744393 *Jul 23, 1953May 8, 1956Chrysler CorpHeat exchange coil assembly
US2822674 *May 5, 1955Feb 11, 1958American Radiator & StandardAir conditioning unit
US2899803 *Feb 15, 1955Aug 18, 1959 Air conditioning apparatus
US3299660 *Jul 19, 1965Jan 24, 1967American Radiator & StandardAir conditioner
US3306070 *Oct 24, 1965Feb 28, 1967Carrier CorpAir conditioning unit
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3910061 *Sep 5, 1974Oct 7, 1975Gen ElectricSafety condensate overflow system
US4083198 *Apr 29, 1977Apr 11, 1978Dennis Donald IAir conditioner case with condensation shield
US4088466 *Sep 30, 1976May 9, 1978Westinghouse Electric Corp.Multi-position air conditioning unit
US4089188 *Feb 18, 1977May 16, 1978Borg-Warner CorporationEvaporator coil
US4129013 *Sep 1, 1977Dec 12, 1978Westinghouse Electric Corp.Air-conditioning unit with multi-position coil
US4151726 *Jan 9, 1978May 1, 1979Westinghouse Electric Corp.Coil and cabinet assembly for air handler
US4410033 *Jul 2, 1981Oct 18, 1983Carrier CorporationCombination coupling retainer and support for a heat exchange unit
US4474232 *Jul 2, 1981Oct 2, 1984Carrier CorporationHeat exchange unit for both vertical and horizontal applications
US4548050 *May 31, 1983Oct 22, 1985Carrier CorporationHigh efficiency fan coil unit
US4658602 *Dec 23, 1985Apr 21, 1987Kramer Trenton Co.Refrigeration evaporators with pitched top panel
US4698982 *Nov 4, 1986Oct 13, 1987Automation Industries, Inc.Air conditioning unit with reversible drain pan and return air panel
US4702087 *Mar 27, 1986Oct 27, 1987Mitsubishi Denki Kabushiki KaishaCeiling suspended air conditioner
US4748821 *Oct 1, 1987Jun 7, 1988Allen BerenterMethod and apparatus for dispensing condensate
US4835984 *Oct 3, 1988Jun 6, 1989Carrier CorporationEvaporator condensate pan with integral trap
US4882911 *Oct 11, 1988Nov 28, 1989Rittal-Werk Rudolf Loh Gmbh & Co. KgApparatus for removing condensate water from a compressor-operated cooling device
US4950316 *Jul 28, 1989Aug 21, 1990Charles HarrisDehumidification system
US5062280 *Oct 31, 1990Nov 5, 1991Martin Sr LendellAir conditioning apparatus
US5090476 *Mar 20, 1991Feb 25, 1992Rittal-Werk Rudolf Loh Gmbh & Co. KgAir-water heat exchanger for a control box
US5207074 *Apr 3, 1992May 4, 1993Rheem Manufacturing CompanyRefrigerant coil apparatus and associated condensate drain pan structure
US5664431 *Apr 22, 1996Sep 9, 1997Martin, Sr.; LendellDrain pan
US5904053 *Dec 10, 1997May 18, 1999International Comfort ProductsDrainage management system for refrigeration coil
US5987909 *Aug 31, 1998Nov 23, 1999Martin, Sr.; LendellAir conditioner drain pan
US6276443Nov 29, 1999Aug 21, 2001Lendell Martin, Sr.Air conditioning coil
US6321556Jun 22, 1998Nov 27, 2001Carrier CorporationThree-way mounting of an air conditioner
US6360911May 22, 2001Mar 26, 2002York International CorporationMolded drain pan
US6519966Sep 10, 2001Feb 18, 2003Lendell Martin, Sr.Air conditioning and heat pump systems
US6715539 *Feb 19, 2002Apr 6, 2004Michael BiancoHeat exchanger and airflow therethrough
US6868689 *Apr 20, 2001Mar 22, 2005Buffalo Air Handling CompanyCondensate drain pan
US7533716Mar 15, 2004May 19, 2009Michael BiancoHeat exchanger and airflow therethrough
US8220282Jan 26, 2010Jul 17, 2012Trane International Inc.Dual-connection drain pan
US8869548 *Jul 16, 2011Oct 28, 2014Aspen Manufacturing, LLC.Coil with built-in segmented pan comprising primary and auxiliary drain pans and method
US20040173340 *Mar 15, 2004Sep 9, 2004Michael BiancoHeat exchanger and airflow therethrough
US20090229799 *Apr 23, 2009Sep 17, 2009Michael BiancoHeat exchanger and airflow therethrough
US20110179818 *Jan 26, 2010Jul 28, 2011Trane International Inc.Dual-connection drain pan
US20110265508 *Nov 3, 2011David PiccioneCoil with built-in segmented pan comprising primary and auxiliary drain pans and method
US20130105114 *Oct 31, 2012May 2, 2013Samsung Electronics Co., Ltd.Air conditioner
US20130284399 *Dec 29, 2012Oct 31, 2013Hon Hai Precision Industry Co., Ltd.Heat dissipating apparatus
EP1910758A2 *Jul 29, 2005Apr 16, 2008Carrier CorporationCondensate drain pan for an evaporator unit
EP1910759A2 *Jul 29, 2005Apr 16, 2008Carrier CorporationCondensate drainage arrangement for an evaporator unit
WO1999067575A1 *Jun 22, 1998Dec 29, 1999Springer Carrier S.A.Three-way mounting of an air conditioner
WO2003071195A1 *Feb 19, 2003Aug 28, 2003Millennium Cooling, Inc.Heat exchanger and airflow therethrough
WO2007012160A2Jul 29, 2005Feb 1, 2007Carrier CorporationCondensate drain pan for an evaporator unit
U.S. Classification62/285, 62/286, 62/291
International ClassificationF24F13/22, F24F13/00
Cooperative ClassificationF24F13/222
European ClassificationF24F13/22B