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Publication numberUS1457087 A
Publication typeGrant
Publication dateMay 29, 1923
Publication numberUS 1457087 A, US 1457087A, US-A-1457087, US1457087 A, US1457087A
InventorsJames Jaevis Preble
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1457087 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

May 29, 1923. 1,457,087

J. J. PREBLE ET AL METHOD AND APPARATUS FOR COOLING AND CLEANING AIR Filed Sept. 13 1920 3 Sheets-Sheet 1 Invenior: Jams Jarvis M26 Lee liParkez',

May 29, 1923. 1,457,087

J. J. PREBLE ET AL METHOD AND APPARATUS PUH LIUOLI NG AND CLEANING AIR Filed Sept. 13 1920 3 Sheets-Sheet 2 lnz/enior: Jmes fire/851 2192720, Lg fii yzrkegk byhwgw Mk7 v78 5.

May 29, 1923. 1,457,087

J. J. PREBLE ET AL METHOD AND APPARATUS FOR COOLING AND CLEANING AIR Filed Sept. 13 1920 3 Sheets-Sheet 3 James (fare/is j rebie, 4/ 39 Lee Parker,

Patented May 29, 1923.


JAMES JARVIS runnereizmann, am) LEE H. PARKER, or BOSTON, MASSACHU- sn'rzrs, assxcnons 'ro sextan-nncrnrrmariaa comm, or BOSTON, massacnusE'r'rs, a CORPORATION or mssacnnsn'rrs.


Application and September 13, 1520; Serial No. 409,991.


Be "it known thatwe, Jiiivms JARVIS Pnnam: and LEE H. PARKER, citiiensof the United States, and residents, respectively,

of Waltham and BostonIiIi the counties of lowing descriptiori,' 'in connection with the Middlesezc and Suffolk, respectively, State of Massachusetts, have-invented an Improvement in "Methods and' ApparatusI for Cooling and CleaningAir, of whichthe folaccompanying drawings. is-s; specification, like characters on the drawings representing like'parts.

This invention relates' to methods of and 16 apparatus for cooling and cleaning air apted to be used for various purposes. In order that the principle of the invention may readily be'understood' we will set forth one embodiment of the apparatus of our 2o invention and the best mode known to us for ratus embodying practicing the method or process thereof.

In the drawings:

Fig. 1 is a vertical sectional view withparts in side elevation of one type of appapracticing the method;

Fig. 2-is avertical transverse section upon an enlarged scale of the lower part of the structure shown in Fig. 1;

Fig. 3 is a horizontal section upon the line 3-3 Fig. 2 and looking downward'in said figure;

Fig. 4 is'a detail showing the strainer .and connections and looking from the right in Fig. 3 at the lower end thereof; and

Fig. 5 is a. detail in vertical section of a form of spraying nozzle preferably employed in the-practice of the invention.

We have discovered after much experimentation that greatly improved results are obtained by conducting or delivering the air in a substantially closed circuit through substantially upright passages or chambers or compartments and into which water or some other suitable cooling and cleaning medium is discharged. The air may be delivered either upwardly or downwardly through the passage, chamber or compartment wherein the spraying is effected but desirably and in order toaccomplish the best results and as herein disclosed the air is delivered downwardly through the chamber or the like wherein spraying devices -are employed that discharge the water the' invention and for same air continuously, cleaning and cooling upwardly into the descending air so that the water having reached the height or peaklof the ascent, thereupon descends with, or through the descending ainthus greatly prolonging the period of contact of the air and sprayed water. but not necessarily. theair is'circnla-ted in a closed'circuit and in such embodiment of the invention the'air is circulated and recircul ated a great'nurnber of times and durmg each circulation "is subjected to the and cooling 'action of the sprayed,

cleaningwater. 7

The provision according to our invention of al'closedair circuit, particularly in connection with electrical machinery has many advantages as compared with air. systems heretofore 'u'sed. Atmospheric air vary generally contains dirt in varying quantities, and 'particularly'is' this true in the vicinity of factories, 'power' plants and the like where frequently the ventilating air it obtained from outside is charged'with smoke, fumes, acid vapors or other corrosive gases; Our invention'contemplates" the use of the thejsame, without any possible way for it to mix with impurities from the outside. whereby the problem of cleaning is solved. Further. by the use of the same air subjected always to the same degree of cooling. the device is rendered independent of changes in the. temperature of the outs de air, the operation being the same in cold. warm, or moist weather. The apparatus herein disclosed avoids the use of number some ventilating air ducts and ismadeto occupy a relatively small and compact space as compared with the known ventilating devices, thereby efi'ecting great economy of space which is an important consideration in factories, 'on board vessels, in power plants and the like. Moreover, all high speed electrical machines are more or less noisy when the ventilating air is-dischargcd to atmosphere,-but in our closed air system this is reduced to an unobjectionable tone and volume. Also, it is found that the necessary quantity of water for removing generator losses from the heated air is considerably less in our closed circulation system whereby a very appreciable saving in the quantity of water used, as compared with present air systems, 91'' the type where the Desirably as used for cooling and cleannig the venti sprayed water is not recirculated is ellerted. The were; as it hollected aiter spraying may be removed from the apparatus so that the recirculating air is constantly subjected to "the cleaning andcooling action of fresh water. Within the scope and purpose of the invention however, the sprayed-water may be cooled and recirculated to the desired extent. i The air' cooled and cleaned as described may be employed for any suita lepur'pose ,and in fact the invention is not limited to cooling and cleaning a stream of air as it may be employed in the cooling and cleaning moving bodies (of any desired gas. ;W e have however chosen to illustrate the invention lati'ng air ofan electric generator, the rotor whereof is diagrammatically indicated .at 1 inF-ig. 1 as rotated by suitable shafting2. The stationary parts of thegerierator, a substantially ,air-tight-.casing are indicated generally the arrows 3' in Fig. 1 the air is circulated past -or through theparts of the generator but is of use forcooling and cleanin any stream of gas, a blower being ,provi ed-if, unlike the instance of a generator, such a draft devjce is not inherently present in a manner that need not be more fully de scribed-since .whileithe invention is :to be peculiarly applicable for coolingnmd cleaning generators, it is not so limited.

The generator or other device or mechanism which is to be subjected to the action of the air is mounted upona suitable ham 4 and beneath said base there is provided -a suitable uprightpassag chamber or compartment 5 that desire walls and is preferably rectangular in cross section. in case a closed circulation of the air or other gas is desired, there is arranged a suitable outer casing here shown as comprising upright walls 6. Got metal such for example as metal lathing-that may if desired be suitably plastered. In said walls suitable emergency dampers are provided such as indicated at 7, 8, 9 in Fig. 1.

The passage. chamber or compartment 5 as shown most clearly in Figs. 2 and 3 has 'the four walls 10. ll. 12, 13, though any other suitable shape or form may be prorided. Within said passage. chamber or compartment and at a suitable height there are provided one, two or more series of spraying devices which in this embodiment of our invention are typified as nozzles 14 of the-general type disclosed in the patent to Eneas. No. 1.101 264, dated June 23. 1914. Desirably a plurality of series of spraying nozzles are provided and suchthat the water can be delivered throu h one or more series as provided, su-itab e valves provided and not herein shown at 3 and as indicatedhy'.

found 137 has metallic side the arrangement is .17 and the location of the nozzles is preferably that indicated in Fig. wherefrom it will appear that the nozzles are not directly superposed and the streams therefrom do not interfere.

The water discharged from the nozzles is in the form of very finely divided particles so as to constitute substantially a mist particularly in the upper part 18 of the chamber Sviewing Figs. 1 and 2. It will be noted. that by the arrangement of chambels and nozzles as herein disclosed the warmea haust air is subjected to the cooling effect of the sprav water during the first partof the travel of the air after leaving the generator and before it passes to the :return chambers. .u

thus minimizing: any tendency of heat absorption by the walls of the chambers.

The water discharged through the various nozzles '14 is discharged therefrom in a wide angle spray that is of substantially uniform homogeneity in transverse section. the water particles being extremely finely divided. and particularlv in the upper part 18 of the chamber 5 does the water exist as a fine mist filling the upper part of'said chamber but falling: thereth'mi-rgh with the descending air. In order, however to prevent any possibility of the passage of large drops of water to the generator or other mechanism or device to which the cooled and cleansed air passes. we nrovidea'nv suitable means and herein ha e represented a series 'of battle plates 19 shown most clearly in Fig. 2 as a series of sheet metal nlates'bent into substantially V form and preferably having edge flanges 20, 20 with perforations permitting: them to be strung upon a suitable number of rods'fll or otherwise held in place. These haflle'plato are placed sufiicicntlv close together to prr vent the passage o ame particles of water.

lVith the apparatus in operation air mnv be taken from ani' source outside the walls 6. 6 as for examp e through the einerrrencv dampers 7. 8 and i rlcsircd and within the scone of the invent on said walls 6 may be omitted in part. Desirablv however. theair is circulated in a closed circuit and as renresenterl in Fig. l it passes upward in the direction of the arr ws 22 and is then forced bv the fan a tion of the geneintw rotor through or past the gencrator or other part that is subjected o the action thereof and then downward in the direction of a'rro s :23 meeting the ascending water spray and descending with the return thereof. The

air passes downward through the chamber 5 and between and ast the various nozzles 14 and then is disc iarged from the lower part of the chamber 5 in any suitable manner and in any suitable direction. Preferably, however, we provide lateral openings at one or more sides of the chamber 5 and desirably through two opposite walls thereof as clearly indicated in, Fig. 2. At said point there are preferably provided elimi nator plates which are indicated at 24, in Fig. 2 as plates placed together in parallelism, the plates being preferably of a zigzag shape. These plates may be secured at their edges to the walls of the chamber in any suitable manner as by angle irons and in a manner not necessary more fully to describe. Thus it will be seen that the cooled and cleansed air issues laterally in two or it may be more directions from the lower part of the chamber 5. Desirably the eliminator plates 24, 25 are vertica'hfor compactness of construction and toafi'ord an uninterrupted upward course for the ascending air currents. By thus positioning the eliminator plates .vertica ly, the

eliminated moisture is caused to flow ver-- tically down and oil from the plates, and does not collect upon the plates in the path of the air flowing to the generator.

While any suitable means may be provided for supplying the water 'or other liquid to be sprayed the following arrangement has been found in practice to be ex-,

ceedingly efiicient as it efi'ects the constant removal of dirt .and foreign matter out of the entire system, so that the recirculated water is forced upwardly through the pipe,

29 and then laterally through the communicating pipe 30 represented in Fig. 4 where it is received in the upper part 31 of a suitable strainer 32 which effects the separation of the dirt and foreign matter from the incoming water. The water then through suitable couplings indicated at 34, 35 in Fig. 4 enters the pipes '36, 37 which respectively communicate with the pipes 15. 16 extending transversely of the chamber :1 and supporting the spraying nozzles 14. The water from the nozzles 14 rises as stated in a spray or mist through the descending air and then descends through the descending current of air and collects upon the downwardly inclined bottom 38 of the chamber 5; from the lowest part of this bottom extends a drain pipe 39 indicated cleaning efi'ect.

culated and particularly in those communities where water is scarce. With the said T 40 also communicates a pipe 42 leading from the lower end of the strainer '32 so that in this manner all the 'dirt collected either at the strainer 32 or upon the inclined bottom 38 of the chamber 5 passes out of the circulating system. 7

The chamber 5 may be provided with suitable inspection doors 43 permitting access to the interior of the chamber.

The pipes 15, 16 may be secured in position in any suitable manner. Herein we have represented them as at the left hand side in Figs. 2 and 3 having special pipe caps adapted to abut: against the 7211113 ing 'the upward progress of the water and again acts thereon during the fall of the sprayed water. It ma'v ,be desirableto spray the water downward if. the air be circulated or travel'in an upward direction past such downwardly directed nozzles, but we have found itrpreferable to pass; the air downwardly through the chamber 5 under ordinarv conditions.

Particularly is it desirable that the water be sprayed upward into the descending heated air in our closed circulation device. thus securing the maximum cooling and Since the same air is continuously circulated and recirculated it is essential that it be positively and etiiciently cooled. which result is accomplished'with great certainty by subjecting the down flowing air to the action of the water sprayed upwardly into said air, and then continuing and prolonging the cooling action of the water by allowing it to turn and-descend again in constant and intimate contact with the descending air. It will therefore be apparent that there is a particular cooperation of the upwardly directed nozzles with our closed circulation device wherein the exhaust air travels downwardly. as above set forth.

Having thus disclosed one illustrative embodiment of the apparatus of our invention and having described the best mode known to us for practicing our invention, we desire it to be understood that although specific terms are employed they are used in a past or through said structure.

2. Air cooling and cleaning apparatus comprislng, in comblnation, communicating chambers. means to circulate and recirculate mnir in a downward and then upward direction tlierethrough in substantially a closed circuit and nozzles supported to spray li uid upwardlyagainst and into the descen ing air current to permit the liquid to fall with Eli-{he descending air current whereby the pcriod of contact of the sprayed liquid with the air current is increased; I

3. Air cooling and cleaning apparatus comprising, in combination, a chamber, an outer chamber surrounding the same, and together constituting substantially a closed circuit, means to circulate air upwardly through the outer chamber and downwardl through the inner chamber and nozzles posi- '-tioned in the inner chamber and upwardly directed to spray water upwardlyinto the descending air current. I 1

4. Air cooling and cleaning apparatus adapted for use with a superpose' bod through or past which the air-iscirculate comprising in combination, a coo'lin' chamber through which the air is pass vertically downward, an outer chamber surrounding the same to receive the cooled and cleaned air upwardly therethrough, nozzles within said cooling chamber directed upward to spray water upwardly against the descending air current, and one or more assages communicating between said cham at the lower portions thereof. the whole constituting a substantially closed circuit.

5. The met-hod'of conditioning the venti hating air for electrical machinery which ronSiStS in passing the exhaust air vertically downward through a chamber, in spraying water vertically upward into the vertically tion, a closed circuit inclu ing a cooling chamber through which the air passes vertically downward anda return chamber communicating therewith and a plurality of upwardly directed spray nozzles supported in said cooling" chamber whereby water is sprayed-upwardlyinbo the descending air.

8. Apparatus for cooling and:- cleaning ventilating air andadapted for'use-in closed communication with structureszhavin .air circulating means, comprising'in com ination, an inner chamber, an outer chamber surrounding the same, 'hpwardly directed no'zzles supported within said-irmer chamber, and communicatin passages between said chambers located 5' 'low-said'no'zz'les,

whereby their to be treated-passes ve'rti cally downward through said inner chamber I' in contact with liquid .from :said =ndzzles both while said: liquid is travelingaupwardly against the air. andwhile.it1is'descendingtherewith and thence is :returned through said outer chamber. for recirculation.

9. In an'asipparatusfor cooling, cleaning and conditioning the ventilating-air for use with structures to be cooledpin combination,

a warm air receiving chamber which the air to be cooled,cleaned, and conditioned is passed vertically, spray means in said chamber, a return chamber or chamhers, said receiving and return chambers together with said structure constituting a closed circuit for the flow of'the air, and passages in the side walls of said warm air receiving chamber to permit the lateral escape of the air to said return chamber or chambers.

In testimony whereof we have. signed our names to this specification.



through- IOU

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4478767 *Dec 8, 1982Oct 23, 1984Toshiba CorporationAir cooling device
U.S. Classification261/115, 310/58, 261/118, 96/365, 261/DIG.300
International ClassificationF24F3/12
Cooperative ClassificationF24F3/12, Y10S261/03
European ClassificationF24F3/12