US2269205A - Air cooling apparatus - Google Patents

Air cooling apparatus Download PDF

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Publication number
US2269205A
US2269205A US344933A US34493340A US2269205A US 2269205 A US2269205 A US 2269205A US 344933 A US344933 A US 344933A US 34493340 A US34493340 A US 34493340A US 2269205 A US2269205 A US 2269205A
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United States
Prior art keywords
condenser
air
pan
water
evaporator
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Expired - Lifetime
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US344933A
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Albert B Hubbard
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General Electric Co
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General Electric Co
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Priority to US344933A priority Critical patent/US2269205A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/022Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing comprising a compressor cycle
    • F24F1/027Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing comprising a compressor cycle mounted in wall openings, e.g. in windows
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14Collecting or removing condensed and defrost water; Drip trays

Description

A. B. HUBBARD AIR COOLING APPARATUS Filed July 11, 1940 2 Sheets-Sheet l Inventor 'Alber't' B. Hubbard 9 His .jll a 7 III 6. AMA ttorneg.
Jan. 6, 1942. A. B. HUBBARD AIR COOLING APPARATUS Filed July 11, 1940 2 Sheets- Sheet 2 Invent 01": Albert B. Hubbard Hi S Attorney.
Patented Jan. 6, 1942 UNITED STATES PATENT OFFICE AIR, COOLING APPARATUS New York Application July 11,1940, Serial No. 344,933 1 Claim. (01.62-140) rangement must alsobe provided for removing water accumulated as a result of the condensation of moisture on the cooling coils; it has become a general practice to provide an arrangement for collecting the water and for spraying it or otherwise introducing it into the path of the air circulated over the condenser, thereby vaporizing the water and also providing increased capacity for cooling the condenser.
It is an object of my invention to provide an air cooling apparatus including a refrigerating machine and an improved arrangement for cooling the condenser thereof.-
Another object of my invention is to provide an air cooling apparatus including a refrigerating machine having an evaporator and an air cooled condenser and an improved arrangement for disposing of moisture condensed on the evaporator.
Another object of my invention is to provide air cooling apparatus of the unit type which shall be efficient in operation and of simple and compact construction.
Further objects and advantages of my invention will become apparent as the following description proceeds;and the features of novelty which characterize my invention will be pointed out with particularity in the claim annexed to and forming a part of this specification.
For a better understanding of my invention, reference may be had to the accompanying drawings in which Fig. 1 is a perspective view partly in section of a room cooling unit embodying my invention; Fig. 2 is a sectional side elevation of the unit shown in Fig. l; and Fig. 3 is a perspec- 45 tive view of a portion of the unit shown in Fig. 1 showing the arrangement of the condenser.
The air conditioning unit illustrated in the drawings comprises generally a casing arranged to be mounted within a window opening and 50 havinga partition constituting a continuation of the window closure and dividingthe casing into two portions, one containing the compressor and an air cooled condenser, and the other the evaporator and a fan for circulating air from the room over the evaporator and back into the v opening at the side may be closed by suitable room. Water collected on the surface of the evaporator is conducted to a pan at the bottom of the condenser so that the lowermost coils of the condenser are maintained immersed in water. The pan is so arranged that in the event of an excess supply of water, the overflow will enter. a pan over which the condenser air is circulated and in the event that there is an overflow from the second pan, the water will be directed away from the unit out of the window opening. The condenser is so arranged that the lowermost coils which are immersed in water constitute a hot gas desuperheater or precooling portion, the condensing portion of the coils being arranged above the desuperheating portion, the precooled gas entering the top of the condensing portion and flowing downwardly therefrom. This arrangement provides a very eflicient use of the cooling capacity of the condensed water, and particularly is effective in vaporizing the water and removing it from the unit since the hottest compressed refrigerant vapors are in heatexchange with the water.
Referring now to the drawings, in Fig.1 I have illustrated an air conditioning unit comprising a housing or casing III arranged within a window opening, the. casing including guide rails ll resting on the window sill l2 and providing a support for an airconditioning unit which may be slid in and out of the casing on the rails II. The window is lowered against the top of the casing I0 and a 'suitable gasket l3 may be provided between the window sash l4 and a flange l5 at the forward end of the housing It. The air conditioning unit is arranged to be inserted from the room side of the housing III and a finished cabinet [6 having an air outlet ll at its top is arrangedto be placed on the unit on the room side against the flange l5 of the casing l0. Any space between the casing Ill and the window panels 18.
The air conditioning unit comprises a housing l9 arranged to fit within the casing I0 and having a vertical longitudinal partition 20 dividing the housing I9 into two compartments, the partition 20 constituting in effect a continuation of the window closure; suitable gaskets such as indicated at 2| ar provided to prevent the passage of air through the window opening between the casings l0 and I9.
In the compartment formed by the partition 20 in the portion of the casing I9 on the outer side of the window are arranged a compressor 22 driven by a motor 23' and a condenser 24 cooled by an air circulating fan25 also driven by the motor 23, the fan 25 being directlyconnected to the motor shaft and the compressor 22 being driven through a belt 26. The condenser 24 comprises a coil having a plurality of horizontal tubes or runs connected by end turns 21 and provided with a plurality of heat trans fer fins 28. A rectangular casing 29 is provided on the right hand side of the condenser 24, as viewed in Fig. 1, and has a circular opening 30 for the fan 25. The fan is arranged to force air into the compressor compartment through the opening 30, the condenser air being drawn into the compartment through the right half of the condenser and being circulated over the compressor and motor before being discharged through th left half of the condenser. The casing I has its top portion bent downwardly as indicated at 3| to provide a rain shield.
In the compartment formed on the room side of the casing l9 are arranged an evaporator 32 and a room air circulating fan 33. The evaporator 32 comprises a plurality of tubes or runs connected by end turns 34, the runs being provided with a plurality of parallel heat transfer fins 35. The fan 33 is connected on a shaft 35 driven by the motor 23 and belt 26 through a pulley 31 as shown in Fig. 2. The fan 33 is arranged to draw air from the room through an opening 38 between the casing l and the casing l9 and to circulate the air upwardly into the is provided with a partition or dividing wall 56 which in effect provides two pans, one a small pan directly at the bottom of the condenser 54, and the other a pan extending below the motorcompressor unit. Water flowing through the conis of equal height on the endsof the pan and along the side adjacent the wall 28 of the housing. The portion of the side-wall remote from the partition is of "a height intermediate that of the main portion and the dividing wall56, as
indicated at 58. This arrangement of the partition 56 and side wall of the pan 54 is such that rear portion of the evaporator compartment, the
air being forced through the evaporatortoward the front of the compartment and out through the opening I 1 which is provided with a plurality of longitudinal louvers 39. The path of the evaporator air is indicated by the arrows in Fig. 2.
During the operation of the refrigerating machine, gaseous refrigerant is withdrawn from the evaporator 32 through a suction line 40 by operation of the compressor 22. The refrigerant is compressed and discharged from the compressor through a line 4| and flows into the lowermost runs 42 and 43 of the condenser which are connected in series and constitute a hot gas desuperheater or precooler. The gaseous refrigerant precooled in the tubes 42 and 43 flows through a connection 44 to the top tube 45 of the condenser and then downwardly in series through the remaining tubes until it reaches the bottom one of the remaining tubes indicated at 46. The gas in the condenser is cooled by the circulating air and liquefied, and the liquid refrigerant flows through a connection 41 to a liquid receiver 48. The liquid refrigerant is returned to the evaporator through a liquid line 49 under control of a thermostatic expansion valve 58, the valve 50 having a thermal element 5| secured in heat exchange relation with the suction line or outlet 40 of the evaporator in accordance with common practice.
During the operation of the refrigerating machine, air is circulated over the evaporator by the fan 33 and is cooled and dehumidified before being discharged through the opening H. The
moisture removed from the air collects in a pan 52 below the evaporator and flows through a trough or conduit 53 downwardly toward the condenser and falls into a pan 54 which comprises the lower wall of the outer compartment of the casing i9 and is below the condenser and motorcompressor unit. The motor-compressor unit is supported within the pan 54 by suitable upright brackets 55 at either end thereof. The pan 54 any overflow of water from the portion of the pan directly below the condenser flows into the main portion of the mm below the motor-oompressor unit in the path of the air circulated by the fan 25 and any overflow is readily vaporized .by the circulating air. Under conditions of abnormal humidity should the pan 54 be filled above the level of the dividing wall 56, the excess water will flow away from the unit over the outer portion 58 of the wall 51. This arrangement affords complete vaporization of the water condensed on the evaporator coil under all normal conditions of operation and a flow of excess water under abnormal conditions away from the unit beyond the window sill, indicated at 59. Under no conditions of operation is there an overflow of water toward the room side of the unit. The relative heights of the dividing wall 56 and the walls of the pan 54 may be selected so that the unit may be considerably oil level without danger of flooding back of the water toward the room and still provide the advantageous feature of an arrangement for vaporizing all the water during normal weather conditions.
In order to insure a minimum transmission of vibration from the motor-compressor unit to the housing l9, the motor and compressor are mounted on a platform 60 which is suspended from the tops of the brackets 55 on suitable springs 6| and rods 52. The suction line 40 and the connection 4| which connect the compressor to the condenser and evaporator respectively, are made sufliciently resilient to insure minimum transmission of vibration.
During the operation of the air conditioning unit described above, the motor 23 is started and stopped by any suitable control such as a thermostatic control responsive to the temperature of the air within the room. As long as there is a demand for cooling in the room the motor is operated to supply liquid refrigerant to the evaporator androom air is circulated over the surface of the evaporator by the fan 33. Any moisture condensed on the surface of the evaporator collects in the pan 52 and flows to the portion of the pan 54 immediately below the condenser. The lowermost portion of the condenser is thereby at least partly immersed in water and the coils 42 and 43 which receive hot compressed refrigerant from the compressor constitute a precooler for removing superheat from the compressed gas. The heat of the hot gas vaporizes the water in the pan. Thewater vapor is removed with the air circulated over the condenser by operation of the fan 25 and discharged Outside. The precooled gas enters the top of the condenser and flows downwardly through the main condensing portionthereof where further heat is removed from the gas which is thereby liquefied. The circulation of the air through the outer compartment of the conditioner also cools the motor and the compressor. Since only precooled or desuperheated vapor is supplied to the main air cooled portion of the condenser, there results a considerable reduction in the required surface of the condenser.
From the foregoing, it is readily apparent that I have provided a simple and effective arrangement of a refrigerating-machine in an air cooling apparatus so that a relatively small space is revquired and so that moisture may be removed readily and efllciently from the apparatus without danger of the overflow of water toward the room.
While I have described myinvention in connection with an air conditioning unit to be mounted within a window opening, other'applications will readily be apparent to .those skilled in the art. I do not, therefore, desire my invention to be limited to the particular construction shown and described, and I intend in the appended claim to cover all modifications within the spirit and scope of my invention.
What I claim as new and desire to secure by Letters Patent of the United States, is:
An air cooling apparatus including a casing having arranged therein a refrigerating machine comprising a compressor and a condenser and an evaporator, a partition in said casing providing two compartments one containing said evaporator and the other containing said compressor and said condenser, means for circulating air over said evaporator. for cooling and dehumidifying said air, means for circulating air through said other compartment over said compressor and condenser, said casing including a pan forming the bottom wall of said second compartment, the lower end of said condenser being arranged within said pan, a dividing wall in said pan having a height less than the height of the wall of said pan for providing .a water reservoir about the lower end of said condenser, means. for collecting water condensed on the surface of said evaporator and for conducting the water to said reservoir, said dividing wall aflording an-overflow of water from said reservoir into the main portion of said pan, and said pan having a portion of its side wall remote from said partition-of a height less than the remaining portion thereof whereby any overflow of water from said pan is discharged away from said apparatus.
ALBERT B. HUBBARD.
US344933A 1940-07-11 1940-07-11 Air cooling apparatus Expired - Lifetime US2269205A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2560467A (en) * 1949-06-23 1951-07-10 York Corp Mounting assembly for refrigerative air conditioners
US2730873A (en) * 1953-05-19 1956-01-17 Ed Friedrich Inc Room air conditioners
US2799062A (en) * 1954-04-07 1957-07-16 Magic Chef Inc Sealing strip
US2875593A (en) * 1953-09-25 1959-03-03 Coleman Co Refrigerant cooler utilizing atmospheric condensate
US2914075A (en) * 1955-02-08 1959-11-24 James R Wells Sun protection assembly for windowtype air conditioning unit
US2935366A (en) * 1957-03-27 1960-05-03 Eric P Cahn Support for air conditioner unit
US2983484A (en) * 1959-01-13 1961-05-09 Westinghouse Electric Corp Air conditioning apparatus
US2994211A (en) * 1959-04-06 1961-08-01 Whirlpool Co Home appliance
US3348365A (en) * 1964-10-16 1967-10-24 Lee P Lottinger Jr Condenser unit air cleaner and housing
US3756039A (en) * 1970-06-20 1973-09-04 Riello Condizionatori Sas & C Air conditioner
FR2552862A1 (en) * 1983-10-03 1985-04-05 Fonderie Soc Gen De Air-conditioning unit with cooling circuit
US6336338B1 (en) * 2000-11-13 2002-01-08 Uri Koren Room air conditioner

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2560467A (en) * 1949-06-23 1951-07-10 York Corp Mounting assembly for refrigerative air conditioners
US2730873A (en) * 1953-05-19 1956-01-17 Ed Friedrich Inc Room air conditioners
US2875593A (en) * 1953-09-25 1959-03-03 Coleman Co Refrigerant cooler utilizing atmospheric condensate
US2799062A (en) * 1954-04-07 1957-07-16 Magic Chef Inc Sealing strip
US2914075A (en) * 1955-02-08 1959-11-24 James R Wells Sun protection assembly for windowtype air conditioning unit
US2935366A (en) * 1957-03-27 1960-05-03 Eric P Cahn Support for air conditioner unit
US2983484A (en) * 1959-01-13 1961-05-09 Westinghouse Electric Corp Air conditioning apparatus
US2994211A (en) * 1959-04-06 1961-08-01 Whirlpool Co Home appliance
US3348365A (en) * 1964-10-16 1967-10-24 Lee P Lottinger Jr Condenser unit air cleaner and housing
US3756039A (en) * 1970-06-20 1973-09-04 Riello Condizionatori Sas & C Air conditioner
FR2552862A1 (en) * 1983-10-03 1985-04-05 Fonderie Soc Gen De Air-conditioning unit with cooling circuit
US6336338B1 (en) * 2000-11-13 2002-01-08 Uri Koren Room air conditioner
WO2002039037A1 (en) * 2000-11-13 2002-05-16 Friedman, Mark, M. Room air conditioner

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