[1]IF Uni'ted States Patent Office Re. 26,160 R e i s s u e d F e b . 2 1 , 1 9 6 7 26,160 WATE' R COOLING SYSTE' M Egon Sorensen, Willow Gro-,,e, Pa., avd Joseph G. Crest, Woodstock, N.Y., ass@gnors to Sunroe Corporation, Glen Riddle, Pa., a corporation of Delaware Gr!Rinal No. 3,069,372, eated Dec. 25, 1962, Ser. No. i,989, San,. 19, 1960. Application for reissue Dec. 17, 1964, Ser. No. 433,243 13 Claiins. (Cl. 62-391) T'Jatter encloced in heavy bracliets E 3 appears in the ori.ainal patent but forms no part of this reissue specifi. cation; niatter printed in it,,ilies indicates the idditions ninde by reis,,ue. This invention comprises a novel aiid us-.-ftil w,ater coolin@ syste-m and more particularly relates to novel featui,es of striieture and operation in water cooling systems of t-he fountain type. The p@rii-@iary object of the invention is to pro-v@de a means for improviii.- tlic constructioii, operatioli and e@ise of serviciii.- ,va,er coolers of th-c fountain type by the provision of @an iniproved installation therein and ala improved construct@@on ol a coinpact coolin.- unit. A very iiia:portant obiect of the pre@ent iiivention is to provide a water cooler wherein a compact, self cont,iiiied and unitary cooiiiig iiiiit is lirovided which may be readily removed from the cabinet, when Decesjity for servicing arises, and whereby a replacemeiit uiiit may be substituted therefor with a ni@Initnum delay and by relatively inexperienced or uiiskilled workmen. A further importaiit object of the invention in accordance witli the above objects is to iprovide a cabinet type of water cooler where a conipact cooliiig coitiponent may be readily reiiioved when necessary for servicili@ whereby t-lic flow of water throligh the fountain of the cabiiiet of ilie folint@iiii niay be restorecl with a niinimi-im delay and a i-ninimum reqtiirenient for labor. Ailotlier iniportant object of the invention is to irnprove the performaiice of a water cooli@-r of the, fountain type and the econoniy of operation thereof throti-h the provision of a spill water precooler for the water supplied to the coolin,@ coils, w@hich spill water precooler shall be of a hi,@lily efiicient construction. A still furth@-r object of the invention is to provide an extremely comp,-,ct but efficient water cooling unit which ii'lay advaiitageously be employed in the cabinets of the folintain type of water coolers whioh are particularly adapted for use as self supporting floor models, or mounted installations such as wall hung fountains or even for use i@i remote types of installations wherein the cooliDg uiiit is mount-ed remotely from the foiintain ponent of the cooler. A further in-iportaiit object of the invention is to provide a very con-ipact type of cooling unit for water cooling fountains which s@all admit of the use of either air cooled or water cooled coiidensers without substanti-al modificatioli of or alteration of the remainder of the structure of the cooling unit. These together with other objects and advanta,-es whicb will become subsequently ap)parent reside in the details of Construction aijd operation as mom fully hereinafter des@cribed and claimed, referelice being had to the accompanying drawings forniiiig a p:art hereof, wherein lilce ntimerals refer to like parts throughout, and in which: FIGURE I is a view in central vertical section thTOUgh a floor model type of water cooler in accor@dance witb this invention, parts being broken away and parts shown in elevation; FIGURE 2 is a perspective view of the removable, compact coolin,@ unit of t@he invention, being shown renioved from the cabinet of FIGURE 1; FIGURE 3 is a view in vertical transverse section tbrough the cooling unit of FIGURE 2, bein- taken upon an enlarged scale substantially upon the plane indicated by the section line 3-3 of FIGURE 2, the cooling unit being of !a type having a pair of air cooledcondensers; FIGURE 4 is a v:@ew in top plan and tipon an enlarged scale of a fo@rni of spill water precooler forming a part of the cooliiig tinit of the apparatus as shown iii the 10 precedin.- figures; FIGURE 5 is a view in vertical traiisverse section of tl-ie spill water p@recooler of FIGURE 4; FIGURE 6 is a view iii c@@ntral vertical section through a modifiecl const@-uctioji of a fountain waler cooler of I ra the wall hitng type and cipboclyiii@ thereiii the coinpact coolin.- uiiit in a,ccordance witb the in@,eiitioji sucli as the coolinltinit of FIGURES 1-5; FIGURES 7-9 are d-@tail views in PeTSpecti\,e, of niodified forms of the lac,,it exchan,-e coil coiistructions 20 which inay be employed in tli@@ spill water precooler of the fountain coolers of F-'LGT-JRES I and 6 or in the coiideiiser coisirtictions of itic cooliii-, iiiit of the inveiition; and FIGURE 10 is a -view paytly iii elevaticii a@id partly 25 in vertical section of a modified coiistructioi-i of the coolin- uiiit in accordance wil@h tli-- inveation, wlierein a wate'r cooled condeitser is employed iii the cooliii- ,init iii lieu of the air cooled coiideiisers of the preceding constructions. 30 There are numerous constructions of water cooler drijiking fouiatains now available to the public. Such drinkin- fouiitairis tisu,ally consist of a@i eiiclosin-, cabiiiet having @the fotintain spoutt extencl@ng ther.-,above, with the cabinet havin@ the water cooler iiiait and its con35 nections to the wa'ter supply aiid draiii lines and to the spout of the fountain to,-Ctlier witb the suitable coiitrols for the delivery of the watCT tO the spout. The water cooler unit in su@-h instaliations consists of a ir@otor coinpressor unit for circulating a stiitable refrigerant through 40 a closed circuit and for establishiiig a heat exchanl, _,e relation between the refri,@erating coils of the unit and t-he cooliiag coils of the driiikiii,,P, water supply conduit. However, wben serviciiag of any of the coniponents of the refrigerating unit or of the water coolin., unit of 45 such a fotiiitain cooler is required, numerous d'ifficulties usually arise. Siii@ce the servicing of the refrigerating compressor, or of the refrigerator circulating system requires the use of specialized faclory equipmeiit and of highly skilled personnel, freqtiently not instantaneously 5o available at the locatioia where service is 'required, eitliet aii undesira.ble and frequently lon,@ protracted delay occurs in effecting the necessary repai@rs and before the fountain can again be placed into operation or temporary or eniergency repairs niust be effected by relatively un55 skilled labor and in,,idequate eqliipment with a resultant uncertain or qtlestiona!ble perfe@rmance of the dri nkinfount,,iin. Further, if it develops that t@he inoperability o'f thedrinkin@,- fountain is such as to require the removal of the water cooling unit from the cabinet, it has been 60 heretofore necessary to re@move the entire cabinet before the units or compartments requiring re@pair can be subsequently disassembled and removed therefrom; -and there is further often a frequent complete stoppage oL' the use of the foudtain until the cabinet can be renioved, the 65 faulty unit can be repaired -and replaced or a replacement unit installed in the cabiiiet, and the cabiiiet be again returned and restored to use. The basic purpose of t@he present invention is to overcome the above noted spocific major disadvantages now 70 attending the use of conventional drirking fountains @and to provide an improved constrtiction and very con-ipact arraugem4@nt of a cooling unit consisting of a motor
[2]comp@ressor unit for ei-rculatin.- a refrigerant in a closed circuit and which is incorporated into a unitary assembly with the water cooliii-. portion of the unit having refri.-eratin.- coils throtigli which 'Lhe coolant is circ,,ila'Lcl and which is in a perr@ianeiit heat excha@.ige relatio@-i viitli a poi-tioii of the watei- cotzdzictiiig systelz ,;Uch o.v the cooliitg coils iii the pi,efei-i-ed f(,t-iiis of the iizvetitioiz by which tie water supply passes thro,,igh the coolin.- tinit and i@ de'ivered to th-. spout of the drinking fo@,iiitain. The compact coolin.@ unit formin,- a-ii essential portion of the aubject matter of the present inv.-nitoii is specifically a@dapted for tise in ttic -cabiiets of dririkiii.fountains of the self-supportiig floor model or of th-wall hun.- type of dritikin.- fountain althoii,@h it may also be employed wiL'@, efriciency in those types of installat;o.,is irl wbich the drinking spolit of the installation is niounted remotely from biit suitably coniected to the coolin.- uriit of the system. The @preferred manner of practicin.- the principles of this idvention resid--s in the floor type construction of a drinking water fount-,iin disclosed in FIGURES 1-5 and which incorporates therein th-- twin air condensers shown irt FIGURE 3 together with the type of spill water precooler sbown in FIG@URE 5, whichparticular form of the irivention will now be specifically describe.d. Floor Type Coolin.- Foiintain of FIGURES 1-5 Referring iirst to FIGURE I it will @be seen tb,,it th@floor type of drinkin.@ fountain construction consists of a cibiiet indicated generally by the numeral 10 and wbich is shown as beii-i- positioned a-ainst or -,tdjacent -i vert;cal wall 12 fr6fn which emer-e the water supply pipe 14 and a water waste or drain pipe 16, the cibinet bein!- shown mounted and supported by a suitable base as at 13 i-ipon a floor or other supporting surface as at 20. The water drinkin,a fountain of this type has tl-ie usual recessed basin 22 in its top stirface from which rises a spotit 24 for the dischar.-c of the cooled or refrigerated -drinkin.- water and wh;ch spoi-it is usu@-dly attended by a -Uard shield 26. The cabinet 10 @n-,Iudes the usual removtble wall panel or section of a wall as at 23 by means of which access may be had to the ititerior of the cabiiet for the purpose of servicing the parts or reiioviiig tberefrom the compact unitary coolin.- unit 30 of this i,lvention, which unit is indicated in its eritirety in FIGURE 2. It will be observed that the coolin-. unit 30 is disposed in the lowermost po@@-tion of the cabiiiet, preferably resting upon the floor thereof and that the va7ious coinections between the water supply and drain coiiduits, the cooli@ng unit and the spout 24 are all disposed in the upper portion of flic cabiiiet above the coolin.- unit 30. There is also disposed in the upper portion of the cabinet and imr@i.-diately b.-low the re-,essed basiii 22 and iii comn-lunication with the discharge or)eniag 3'-7 of the latter a spill water coolin,- unit 34, which s-.rves ttie idtial functions of discharging the spill water from the spoul 24 ajid collected by the basin 22 iito the drain or return conduit 16, and in utilizing this spill water as a means for precooling the water supplied from the service line 14 into the cooling unit 30 and from the latter to the spout 24. As will be observed espe--ially from FIGURES I and 2, the cooling unit 30 is provided with a water inlet conduit 40 having a qliiekly detachable connector 42 by wbich it is connected to the conduit 44 by which precooled water is received from the spill water precooler 34 and is then delivered into the coolin,@ coils of the cooling unit 30. A further conduit 46 provided with a quickly detachable connector 4,8 delivers the water refrigerated in the coolin- unit 30 to a conduit 50 which in turn is co-tiiected to the control valve 52. The control valve is of conventional desi-,n and delivers the chilled or refri,@erated water by a further conduit 54 to the fountain spout 24. The control v,,ilve 52 is suitably 26,160 4 mountei unoji the interior of the cabinet 10 and iF, ol)erated sele-,tivety by a ni-,iiiual pusli b@i,toii opci-.,iti:iz i-naiis as at 5C) at the ul-per ciid of tii.- cal-,iiiet oi- b@, i foot operated p-.d,,il 53 at the loa,cr end tiic,.-eof, sliitalile coiinectiii,- mcans wliicli ii tlieiiiselves foi-ill ilo part ()f tile presciit invention bein,,@ eniploycd to oper,,itively coiiiiect the manual aiid foot ol)-,r,,,tors 5,) aiid 5S to the val\@c 52. As so far described it @vill iiow b@, uiidei-stood that the gene,-at operation of this - ,ipparattis is as folloN@,s. @@liter 10 from t]-@e service line is dcl:xvei-ed by the stipl)ly coiitl,,iit 14 an-I thro,,igh a maiiual shut-off v@ilve CO to t@e iiil,,t p@pe 62 by wiiieh the @@,ater pis,.;es tliiou,@li the silill water precooler 34 to be lie@-eii,@after desci-ibed is deli%,ei-ed by the coiiduit 34@ and detacliable cotinceloi- "2 to 15 the inlet line 4,5 of the coolin.- uiiit 30. Frc)jii ilic ],litter the, refrigerate@d wat.@r p--sses by the coiici@iit 46, delac'llab'e connector 43 in cojiduit 50 to the vilve 52 aiid tlience to the coiiduit 54 to the spout 24. Spill\@,,iteifi-om the latter is collected iii the basiii 22, piisses 20 th,@otilli the spill water unit 34, and by nicans of a draiii coiidult 64 detachabl@, coiinected to a tfap 6(i is char.-ed to the drain or waste pij)c l(i. It will b-- pa,-ticul,,irl), iioted that all of the cc)iiiiectioiis with the water supply and dr-,iin COlIdLlitS, and ft-oni the 25 cooling unit for dischar.-ii,,,- water to the di-inl@i@i,,, fotiiita;.,i are house<:!Kwithin the ,ipper p,,ii-t of tiic s@iiiic]\N,Iici-c they are readily acf,,essi-ble for attacliniont or discoiiiicction by removing the access panels 28. Rcferri-.ig now specifically to FIGUIZE I it %@,ill bo Cl @ Ile 30 oLse@,-ve 'hat t re is shon@,n in dotted line@ a connectiii, coiidl,,it 70 iNIiieh is showii as be@Iiiof connection betnveen the two ends of II-,e coi-,tlii;ts i,i anJ 50. The arr-,ing,@nient is sli,cli tli,,it wlieii the cc)t)lil)L unit 30 is removed froiii the cabinei, foi- Alliicli plii-pose 35 it is necessary to disas.-eiiible the coiinectioiis @12 iiid 4',',, after first closin!g the rnanliall@, opei'ated sti,,ipl@, V:11\,c 60, the conduit 70 may be contiected to the cotiiiectioiis 42 and 48 and thus directly coiinect tille s,,jiii?]), ]iiie, as it passes through the precooler by the conciiiit 62 to the 40 spout whereby the fouiitain will -be ag.-iiii placed iiito ol)- eration althoueh the of ilic @@,ill ilo lon@er be aciiieved by tli@s aild NN,itlioiit ilie u@e of skillcd labor the coolilill iii,,it 30 iii,,,,y be quicl@ly disconnected froi)i the otlier connections of the ciriiikiti@, 45 fountain, removed therefrom aiid tli@- (irinkill,- foiil)t,-Iiil iiiay be a-ain placel iii op.2r-,itioii -,iltliotigii N,,7itilolit tile water coolin.- oli-,ratioi, in a relatively short perioci o" time. Refereiice is now ni,,ide sp,-c:lrically to FIGURE-S 4 50 and 5 for an u@-iderstandiii- of the cojisti,uctioii iii(i the operatiori of the spill water@precooler 3;1., The s])ill NN,@iter precooler 34 as illustrated coinprises a cii-ctil@ir iiiet@illic plate 72 which slopes radially downv,,ai-d!v fi@oni i,s lici-iiiieter to its central port'@oji whcre it is 'pron,ided @,,,itli @i 55 drain openilig 74 communicptin- with the attacliect 1)oj-tion o' the drain con@duit 64, T]i@- i-ini of the plite 72 has a circular upstandin.- wall 76 and ,idiacent this is the downwarcily directed drain pipe 78 NN7]iicli frorn the previously mentioned draiii opeiii-ki- 32 iii the 60 collecting basin 22. Tlius, the spill i\,-,iter fro,,ii the spo,,it 24 wbieli is dischai-@ed into ,And collects i-,i t)ie collectiiij, or draina.-e basin 2'2 is drained throti,@h the draiii iiijle 78 into the spill water unit tdjacent theperiplieril thereof. 65 A spiral fin or wall 80 is disposed x@,itliiii the circiil,-iirim 76 and rises from and is secured to the pl@ite 72 coiistitutin,,- the bottom wall of the spill NN,ater pi,ecoolei-. The spiral rib or fin 80 tlius serves to direct tlle iiicoliiillz,@ 70 spill water from the condtiit 78 to follo\N, a sliiril li@itli upon the top surface of the bottoiii wall 72 of the sl)ill water unit before it reaches the dischar@.e opeii@ii,,, 74 the dischar.-e conduit 64. Conscaucntly, the refi-i.@erated spill water is caused to tbsoi-b licit fi-oiii 75 and thus to :considerably chill the spiral rin 30 liid i-e-
[3]r 5 frigerate the latter belore the spill water is discharged into the waste pipe 16. The spiral rib SO cojistitutes a heat exchan,@e coil, As ,hown in F.TGURE 5 in the haat excbari.-e coil 80 consists of a vertically elongated outer i-netal tub,.- 82 having a 5 latei@ally enlarged lower portioii 34 iii whicl-i is recei@Ted a metallic conduit 86. T@he condliit 86 lias its opposite ends connceted to the water supply condliit 62 by wbich water from the service line 14 is Ctelivereci to the spill water precooler and to the discti-,ir.-e coiidliit 14 wbereby 10 the precooled water is in ttirn delivei,ed from the spill water precooler to the condliit 40 by which it is iiidiicted into the cooling unit 30. As will be noted fi-om FIGURE 4, the inlet end of the heat exchinge coil 90 passes through an ,tperture 90 which is rositiojied closely ad- 15 jacent to the opeiiin.- 74 at the car@tr.-I portion of the bottom wall plate 72 of the pr,-coo-"-r uiiit aiid is setiled in this openin.- in a water-ti.,-ht r,,-Iation in aiiy suitable nianner. The rother end of the water precoolin.- coil 3@3, as shown at 92 in FIGURE 4 passes outwardly of the 20 spill water precooler unit and prefei-ably throtigh the side wall 76 thereof as shown in FIGURE I and fornis a part of or is roiinected to and is in comi-iiiinicatioti i,/ith the precooled water delivery co-nduit 4-,; previously mention,@d. 25 It will thtis be observed tb.Et th..- spill water prec,,oling coil 80 establislies a -oo@d heat excha@ige rel-,Ltion between the spill water and the stipply water for the cooliiia unit and the fountiin aiid mainta;ns two tliickii--sses of metallic conduits betw--cn th,@ feed water a.-id tiie cooliii.- 30 water. T@ie si)iil wa'cer cooler f,,,irtlier possesfes the impc)rtant advintage that it is vc:,rtically a ver@, compact ii-.iit having a minin-itim ever-all hei---ht while catising a horizontal travel o-f the coolin.a wal@er to p,-ovide ,t i-el,,Itively great area for heat exc-@ati,-c plirpo-ses. Thiis optin-iliiii 35 use is made of tiic r(,I-,itively limiteci vert-ical spice,. available withi-@i the cabin--t 10, btit utiliz@-s to the ftillest t!ie considerable horizontal @irea which is prc-@@eiit th@-reiii. It will be understo,ol at this point tii-,it '@iic spccific arrangenient of the feed water CO-@IdL!it 86 and of the 40 spill water coolin.- condiiit 82 pi@eviously deser'lbed in connection witii the spill wat-,r pi-ecool..-r c.oiistruction, although a preferred ei,-@boCinient for tb3 plirposes of this invention cou"d b-- replaceci by ot'@ler irraii.-ci-Oents by wliich the ciesirecl beat excharige rc!Etion is estiblislied 45 @between the feed water and the co,oliii- watei-. Foiexample, the a'@ternat-'ve precool,-i- coil consfrlictio-@i of FIG'ORES 7-9, to be O@escribed b--reiiiaiter i@iore specifically, can be util@ized in t@o arraiigement of Fll,'jURES 4 and 5 with the same spiral dispositioi-i of tli-, COOlilIg 50 coil 30 -@vithin tl3e ibasin of the pr,-cooler uiiit. Atteiition is no-w directed niore specifico,.Ily to FIC3- URE 3 for an uneterstaiidin- of the constrtiction a@id the relative arran.-en-icrit of tiie conipoiients of the cooler unit 30. The coolin.- i-init 30 consists of a lower sec'Lion 55 100 in w-hich is bott,-,ed the ir@ote@r, coi-iipr,,ssor and co.1- denser comp-orients of the ceoling uiiit ;ancl aii tipper section 102 in vihich is disposcd the evaporitor or ciiilling component of the coolin- tinit, the two se@cions b--iiilpreferably separately cois;-ticted aiici then i-i-idly secured 60 together into a unitary a@sei-nblage. As will be observed fr,om FIGURE 3, there is a vert;cally disposed centrally positioned air passa,--- 10,4 exteiiding throti,ah t.,iose tinits, this passige -bein,- open ,it the top of the s,,ction 102, but bein- closed at the bottcm of the section 1-00 as bY 65 the bottom wall 106 e-f the latter. T-he lower section 103 has a removp,@ble ,icc--ss clos,,ire 108 in one sicle wall of t@,c lattcr wliereby access may be had to the interior of the IoNver sect;oji for inspection of or servicing of the motor coinpressor Linit 110 inoiinted 70 therein, and which latter is o-f any coiivoitional design. A pair of air condensers 112 are motinted in opposite side walls of the lower section aid likewise ar-- of any suitable and well known desi.-n. These air cond-@nsers are so disposed that coolin.- air entering the cooling unit from 75 26,160 the -opeii upper end of the passageway 104 will pass down wardly tlirough the upper section 102, the 'lower section 100 and will en-iprge throu..-b the air coiadensers 112 thereby cooling the refriaci-ant circulating coils 114 tlierein. Referriiig now more specifically to the upper section 102 it will be observed that by a spider type of stipport assen-ibly 116, secure;d by fasteniiig bolts I'LB to the top clostire plate 120 of the top section 102, thei@e is supported centra,lly within the passageway 104. an electric n-iotor 122 provided wit.@ a cooliiag fan 124. 'The coolin.- fan is thus disposed within the passa.-eway at tiae lo,@i,-,r pot,tion of the upper sect,on 102 a,.id jtist above the iipper portion of the lower section 100. The fan assists in directing a flow of cooling air in a direction iiadicatect by the arrows in FIGURE 3 downwardly throti,,,h t@.e passigcway .104, over and abotit the i-@iotor coinpies@jor iiiait 110 and then laterally outwardly throtigh t@,e two iir condensers 112 where this air is disc-har.-ed suitable louvei-s in the sides of the c-,tbinet 10 closely qe!jacerit to the floor upon @vhich the cpbinzt staiicis. Tll-. air stii)plied to the upper ei-id of the passagea,ay is prolerably drawii into t-he louvers i26, see FIGURE 1, in the sides of the ca,binet 10, wbere the iiicoii-iin- air A,ill be clriwn aercss t@@e exj)c)scd portiois of tl-,e v-,,ater pipin., system thereiii anct will s@.rve to reii-iove c(yia-ler3sition t@ierefroni aiid pi-event the dripp'pg of condensate. T-he i-ipper sectiion 102 his a cyliiiciricil sleeve I'@,B which forms tl-,e wall of the pasa-ewiy 104 i,,i t@te t-,p,)C@r sectio,-i, anci the spac-, betwecn the sleeve 13@,,@ anci outs-',de casing IL32 of the i-ipper seccioi :@s wtl:h "itable heat insu'latin.- iiaterial 134 of ai-,@y desir--d cl-,,qracter in which is ep.-ibecfded a refrigera@i@iE,, coil as3ei-nbly foriiiing ti"ie evaporator of th-. co.oliii,,- iiiiit wlii,-Ii is in@qicated geiacrildy by t@ic iaujiieral 13C). The ing coil 136 coilsists of two nested, -.oils 138 and 141,11 - @@,@lich P,,re seerred in @tn intiinate tion. The evpporator uiiit 136 is of a conventional tvpc a.,id is connected to th@- nioto,r coiiipressor uiiit i,-i accordance with con@,ent-ional clos.,-d cycle refriger@itins3istenis. Tia operatioii, the i-efrig-,ranL wliich is liquei'ied by passi,ge of the sa.,iie thro'ci,-'ri the coil -in the ,iir concle,,isers li2 is condticted by the liqliid refrigci@prt sjj,,)I-,iy or c'iolivery co-iie@tiit 1-.1,2 to t-he expansion cliiinnr poi-tic,.'l of the refrigerating sysfeni as at 1,-44, and from t@,enc- piss,@s thro-.,-@gli th,- refri,-erating cool@ai-it coil and froni tl-ience is rptirneci by th,,@ condijit 14@6 irto th,-- niotorcomiiressc@r unill From t-he latter the comlressed is theii delivered by the cc,.ndiiit l@S i-,qlo on,,@ co.-idcp-ser 1 @', 2 at the upper end tl-,ereof, passes thro-til-'ti th-@ cooling concl@-ns--r coils -114, is tiien Cischar.@ed by the con.-.tiit I.I@'a to tho iipper end ol' the othcr air cofl@iciis--r Linil where it is liqtiefied aiad then agai@-i starts it cyclo by passa,@@t@'irougli t.iie delivery conciuit 142. T@he Listial stiitable controls are Drovided wiiereby the operation of the r@-frigeratino, cycle of the coolant and of the ri,@otor compro@.sor unit is atitoniaticall)7 effected. By meaiis of tlae condliit 4,1 the pi-ecooleci water sLiT)ply from the spill waler precooler is dclivered to the v;,Iter COOliflg coil E@-403 138 iii the evaporitor portio,-ti of the upi3er section 102, and passiiig t,@roi-igh the coil 138 in good heat excliaiige relation wit,-i the in@ll i-efi-igera7it coil [1381 140 is chilled i.,id then cl,--livered by the cond@Liit 4,,') to the spout 24. It will be observed that in this co,ii@,truct;on thcre is a forced downflow of cooling air throti@.h t@ie c,,,nter of the apparatus the air beiiig drawn into the caljinet qt the upper or rnidportion of the same and b@-in,@ discnarged therefrom adjacent the flo,or upon wliic@b the ctbinct rests, and serving to cool the motor conipressor uiiit as weil as to constitute the cooling medi,@im ior the condenser 112. In this construction air cooling c.Dndepsers -112 are erqplo@,ed in OTder to obtain the advanta@,- - of water ecoiion-iy in the apparatus. In scine instances, however, it may b,- excliaiige rz@ia-
[4]preferred to utilize the -.reater cc>olin,a capacity of water cooler condenser and for this purpose the modified construction shown in FIGURE 10 arid to be hereinafter described may be satisfactorily employed. 5 Water Cooled Condenser Construction of FIGURE 10 Although the air cooled conderiser construction of the embodiment of FIGURES 1-5 is considered to be the preferred for-@n of practicing the principles of this invention, it is also possible to utilize therei-@i a water cooled 10 condenser construction in place of the air cooled coidensers in the embodiments of FIGURES 1-5, or also the embodiment of FIGURE 6 or in the previously referred to installations in which the drinking fountain is located remotely from the water refri,-erating unit which is con- 15 nected thereto. In the embodiment illustrated in FIGURE 10 the numeral 160 identifies the cooling unit correspondi-@ig to the unit 30 previously mentioned. In the cooling unit 160 there is likewise provided an upper section 162 which is 20 identical with the section 102 of the unit 30, and a lower section 164 which is of the modified construction disclosed in FIGURE 10. The two sections are joined togethe,r rigidly as in the preceding embodiment and their association with the cabinet 10 and the other elernents of 25 the drinking fotintain installation are identical with that previously described. Moreover, in the arrangement of FIGURE 10 the lower section 164 has the motor compressor unit 166 therein likewise mounted centrally of the unit as in the preceding 30 embodiment. The water condenser unit 168 is now mounted however in the upper section within the central space inside the evaporatin@. unit 136, the fan 124 and motor 122 being now removed. The refrigerant inlet line to the motor compressor unit is shown by the numeral 35 170, while the output line therefrom to the condenser is indicated at 172. The water condenser IL68 consists of two nested coils, there being the cooling water coil 174 and the coolant or refrigeration coil 176, these coils being secured together 40 in an intimate heat exchange relation. The conduit 172 is connected to the coil 176 while the liquid refrigei-ant from the latter is discha,rged by the conduit 190 into tfie evaporating chamber 1,1,4 of the evaporator and refrigeratin- coil 1-init 136 of the construction previously men45 tioned in connection witb the precedidg embodiment. The atitomatic control valve 182 is disposed within the lower section 164 to control the supply of cooling water to the water cooling coil 174 of the water condenser 168. A capillary line 183, communicatin.- with the high pres50 sure side of the refri.-Cration system, as for example to 172, serves to operate water regulating valve 132 to adtnit additional cooling water, when needed, in response to increased pressure above a predetermined value. In this arrangement, cooling water supplied by the con55 trol valve 182 passes through the water cooling coil 174, it is then discharged from the latter to any suitable drain and in any desired manner, not shown. In some instances, the forced air circulation provided by the fan 124 and the cooling air passage 104 of the preceding embodiment may 60 be employed to supplement the action of the water cooling of the condenser and/or to cool the motor compressor unit 166. In other instances, however, the cooling air circulation may be in par-t or completely dispensed with. The structure of this form of the invention permits the 65 use of the same base and mountidg of the motor compressor in the lower compartment, as in the precedin,- form, while the air fan and motor is replaced by a water cooled condenser unit mounted in the space formerly occupied by the former. The air condenser units of FIGURES 1- 5 70 are of course dispensed with in this arrangement. Wall-Hung Type Drinking Fountain of FIGURE 6 Referring next to FIGURE 6 it will be observed that there is disclosed a wall hung type of cabinet 190 of a 75 drinking fountain whicli is of a more compact .iiid of a smaller volume ttian that of the floor tyl@e installatioii previously described. In this -,iri-an.-cnient ilic cibinet 110 is secured as by fastenin- screws 192 to the vertic,.il surf-,ce of the wall or otlier support 194 iii a conn,enient position for use and above a floor or the like as at 196. The cabinet lilewise ineltides -,t top wall haviii,- i recessed collection basin 198 tlierein, the supportin_Q bottoni w,,ill 200 and a removable w,,ill or closure paiiel 202 by wl)icii access may be had to the interior of the cabinet for the same purposes as set fortli in connectioii witli the embodime-@it of FIGURES 1-5. There is likewise nioujited it the lower portion of this cabinet the cooling unit 30 of the cabinet previously described. In this cii-ibodinient it will be observed that the coolin--- uiiit takes up niost of the volume of the cabinet 190, where-.is in the embodinient of FIGURES 1-5 the cooling unit requires a relativel@, smaller proportion of the voluiiietric sp-,ice within the cabinet. The spill water cooler 34 previously mentioned is also employed, and the s-,tme refereiice nuiiierils ai-c applied thereto. The di-ain 204 iii the discliirge openiiig in the bottom of the collection basin 198 is coniiected throu,@h the trap 206 directly witli the waste pipe 208 extending from the wall into the interior of the cibinct. Further, the @N,ater inlet line 210, controlled by a rn.,inu@il cut-off valve 212, is coniiected tlirough a suitable det@ichable conriection 214 witli the inlet line 216 by wliicti ilie incomin,@ water is delivered into the coolin,- iiiiit 30. Througl-i the conduit 218, the refrigerated witer is discharged from the cooling unit 30 tlirougli a detichable couplin- 220 to the manual control valve 222 from ",Ilicii it is delivered by supply conduit 224 to the fount,,iin sl)oiit 226 in the same manner ,is in the precedini_z embodimeiit. The push button as at 223 serves as a manually operate(i means to control the operation of the valve 222, it being observed that the pedal operated valve 58 of the embodiment of FIGURES 1-5 is being omitted as being no longer required for this form of the itiveiition. However, as in the preceding form of the in%,cntion when it is necessary to move the cooliiig unit 30 froni the cabinet 190, the connections 214 and 220 may be quickly broken so that the cooling unit may be readily removed, then a brancli conduit similar to the conduit 70 of FIGURE 1 may then be connected to theconnections 214 and 220 to again place the spout 226 of the fountain in operation even though the coolin.- unit has becn rcmon,cd therefrom. Modified Heat Exchange Coils of FIGURES 7-9 As previously mentioned, the heat exchange coil 80 of the embodiment of FIGURES 1- 5 can be replaced witli the modified heat exchange coils of FIGURES 7-9. Furtlier, these modified heat exchange coils can -,ilso be used as can the type of coil 80 of FIGURES 4 and 5 in place of the heat exchange coils 136 of the evaporator unit in the embodiments of FIGURES 1-5 ind FIGURE 10. In each of FIGURES 7-9, there is disclosed a heat exchange coil system in which the coil coiitainiiig the liqtiid to be cooled is in return received in a sceond DICI,'Il]iC tube to thiis ensure against the possibility of a lelk developin- between the feed watcr and the spill water wliicil would contaminate the feed water. In the arrangement of FIGURE 7 the flatteiicd outside metallic tube indicated at 240 has one rclatin,ely fl@it side wall 242, wbile the other side wall thereof is inwardly deformed as at 244 to pron,ide a lower tubular portion 246 in wbich is received and cdclosed the witer tube 248. It will be observed that in this arringeniciit the deformed wall also to sorne extent deforms the %@,,,iter tube 248 so that the latter is almost completely enveloped by the flat wall 242 and the curved wall 246 tliereby obtainin.- an almost complete envelopment of the tube 248 to secure a maxin-ium area of coiitact and hc,,it excliange relation between the outside tubular niember 2,40 and the inside tube 248. Comparin.- FIGURE 7 with the ,ir-
[5]9 rangement of FIGURE 5 it will be observed that a greatl3 increased area of contact and heat exchange is producea by the construction of FLGURE 7 as compared with that of FIGURE 5. Referring next to FIGURE 8 it will be observed that the outside tube 250 has a pair of tubes 252 and 254 therein, the former of which can receive the water to be cooled while the latter can receive the cooling medium being circulatcd. A deformation 256 of one of the walls of the outer tube serves to separate the tubes 252 and 254, increase the rate of heat exchange contact between the outer and inner tubes. In the arrangement of -FIGUR-E 9, the outer tube 260 has both of its side walls inwardly deformed as at 262 and 264 to thereby embrace and separate the two inner tubes 268 and 270. In all of these forms of the invention it will be observed that the deformation of the outer tube increases the area of coritact in heat exchange relation between the latter and the inner tube or tubes, further protects the inner tube a.-ainst the danger of a puncture whereby the feed water supply might be contaminated by the coolant. The foregoing is considered as illustrative only of theprinciples of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and cqi.iivalents may be resorted to, failing within the scope of the invention as cl-,iimed. What is
