US2546417A - Refrigerating apparatus for beverage coolers - Google Patents

Description

March 27, 1951 w. E. ANGLIN 2,546,417

REERIGERA'TING APPARATUS RoR BEVERAGE cooLERs Filed May 14, 194s 4 sheets-sheet 1 March 27.1951 2,546,417

REFRIGERATING APPARATUS FOR BEVERAGE COOLERS w. E. ANGLIN Filed May 14, 1948 4 Sheets-Sheet 2 WalZZz' mEf. gli,

March 27, 1951 w. E. ANGLIN REERIGERATING APPARATUS EoR BEVERAGE cooLERs 4 Sheets-Sheet 5 Filed May 14, 1948 ATTORNEYS l March 27, 1951 w. E.ANG| |N 2,546,417

REFRIGERATING APPARATUS FORf BEVERAGE COOLERS Filed May 14, 1948 4 Sheets-Sheet 4 3 INVEA/roR Wam-E. Anglz Patented Mar. 27, 1951 REFRIGERATING APPARATUS FOR BEVERAGE COOLERS William E. Angln, Dallas, Tex.

Application May 14, 1948, Serial No. 27,104

Claims.

This invention relates to refrigerated chambers of that type in which the refrigerating unit it removable or replaceable as a unit, Without disconnecting the refrigerant carrying conduits between the compressor, condenser and evaporating coil, to facilitate servicing when repairs are required. Such units are frequently referred to as packaged units, since the replacement unit is generally brought to the place of installation in a crate or other container, and the removed unit taken away in the same container, to be repaired at the shop. In this way, the transfer can be made in a short time with minimum interruption to the maintenance of refrigeration in the chamber.

The actual removal or installation of the refrigerating unit is generally not a simple procedure, for the presence of the motor and com"` pressor makes the unit heavy, and in general, it has to be lifted to the top of the refrigerator to be removed or inserted. This puts the service man in an awkward position, so that he is frequently obliged to let go of the unit before it is seated upon its normal support, resulting in impact shock both to the unit and refrigerator. In any event, there is considerable manipulation re quired of a heavy object in restricted quarters, unduly prolonging the job of removing the unit and inserting the replacement unit. Furthermore, the evaporator coil is generally located in a compartment separate from the motor-compressor-condenser part of the unit and is only imsily attached by the flexible metal refrigerant conduits, so that a second man is usually required to handle the evaporator coil simultaneous with the lifting and lowering of the heavier part of the unit. l l Y One of the objects of the present invention is to provide a refrigerating unit of the type embodying a closed refrigeration system, which can be removed or installed without the necessity of lifting it above the top of the refrigerated chamber.

Another object of the invention is to provide a refrigerating unit of the type described, to be employed with a refrigerated chamber having a bottom wall supported at such height as to permit the refrigerated unit to be positioned below said bottom wall, and having a hole in its bottom wall to register with the evaporator coil of the refrigerating unit, the latter including a closure,

ber, the motor-compressor condenser component of said unit being outside of said chamber.

Other and more specific objects of the invention will appear as the following description of practical embodiments thereof proceeds.

In its exemplary form herein shown, the in-V vention is applied to a beverage cooler. It is, however, to be regarded as of general application to refrigerators of various types such as household, reach or walk-in boxes, deep freeze cabinets, air conditioners, etc.

The invention comprehends two types of heat exchange, one in which air is circulated over the evaporator coil, and through the refrigerator, and the other in which a liquid medium is similarly circulated, an example of the packaged unit for each type being herein illustrated andy described. A l

In the drawings which accompany the following specification, and throughout the figures of which the same reference characters have been used to denote identical parts:

Figure 1 is a rear View in vertical section of a refrigerating unit embodying the principles of my invention, serving a beverage cooler;

Figure 2 is a vertical cross-section taken along the line 2-2 of Figure 1;

Figure 3 is a horizontal cross-section taken along the line 3-3 of Figure 1;

Figure 4 is a plan view of the bottle supporting tray.

The above figures illustrate a form of the invention designed for the use of air as the medium of heat exchange.

Figure 5 is a rear view in vertical section of a modified form of refrigerating unit in association with a beverage cooler, designed for the circulation of a liquid heat exchanging medium between coiland refrigerated chamber;

Figure 6 is a perspective View of the coil component of this unit, together with the structure intimatelyV associated therewith; l

Figure 'lV is a longitudinal vertical section through a modified form of the invention;

Figure 8 is Vav cross-section taken along the line 8-8 of Figure '7, the shroud being omitted.

Referring now in detail to the several figures, and first adverting to that form of the invention disclosed in Figures 1 to 4, inclusive, the numeral I represents as a whole a beverage cooler come prising an outer casing 2.', supported upon a base 3, said base including, as shown, a framework including the -cross members 4, The casing 2 supports an open topped bottle cooling chamber 5, defined by the vertical insulated walls 6 and the horizontal insulated bottom wall l. Said walls include a continuous sheet metal lining 8, for said chamber. The bottle cooling chamber occupies the upper part of the casing 2, so that the bottom wall I is at a distance above the base 3. At the rear the casing 2 is provided with a removable door II extending thereacross, giving access when removed, to the space below the bottom-.wall 'I, within which lspace the refrigerating unit is located. Said unit as a whole is designated by the reference character I2.

'I'he bottom wall 'I is providedrwith a large circular hole I3 therethrough, centr-ally" "located in the specific beverage cooler shown. The bottle cooling chamber 5 is provided with a remov-` able bottle supporting tray I4, having a downturned peripheral flange I5 which- -rests tipon the bottom wall 1, and having a deep cylindrical baie I B secured to the,under side thereof, of smaller diameter than-the hole I3, extending through said ,hole coaxiallyythereof. vThe tray I4 has; a central hole' in registry with the baffle I "i,Y covered by `a -i'eticulated screen which, as shown, `is in vthe same `plane asV the bottle supporting surface of said tray. The trayv is provided, with 'acir'ciimferential series of louvers I8; Vextending in lines radiating' fromVV the center of the screen 'IY'I, and Vwith parallel V'series of similar louversl 9; eXtem'ling/erosswise o'f'the tray at eachV end. 'The louversare formed by stamcing out tongues 29 in anfincline'd Tdownward 'direction. said Vtongues,forming baiiles beneath the tray. Said -baffles are'sof'directed as todelect an air column rising through the hole I3, outside-of the baffle I'E--dis'tribii-tively through'said louver's. VA hinged"lid, `not shown. normally close'sfthe *cooling chamber '15, 'res-ting -upon a peripheral rubber gasket 2l, and whichf-israised by the customer who servesv himself -tofa bottle from said chamber.v

"The refrigeratin'g `unity comprises -a platform 22, on which are monted a -motorfcomnressor 23, condenser v24, andlcondenser'fan 25, ythe latter bein?,i withina -hood l2t?, aridbeing `operated by the 'fan motor 21. These Iparts are conventional larldftl'ieir arrangement is moore or less conventional. A condensat'panZ is also carr'iedHby the platform '22. v

The condensate Vpan isprovided with a conieirfs'upporting screen 129, reaching down to the interior vbottom of the pan, over which a piece ofogaiiae `rnaterial or the like is spread, the edges ofwhch `dip into "the condensate in the pan, raising it wicklike by capillarity. an'd assisting inwits'fevaporation. The 4removable door I vI is provided with louversadiacent the motorcoinpressonandjthe fronty cf'theca's'ing 2 is provided withv louvers 3| adjacent the condenser, air being drawn in at the latter' louvers by the fan-25, and discharged through the louve'rs 30, theair, heated' by its passage through the vv'con- `the lower ends of which v'screws pass freely cient fullness to provide the flexibility necessary for the adjustment of the well together with thetcoil-rfelativeto the instrumentalities mountled-'on the stationary platform 22.

The conduit connection :i I.v may be a capillary tube, or a receiver for liquid refrigerant (not shown), with temperaturefresponsn/e feed valve (not shown), intercalatedin the connection from the condenser to the evaporator coil. There is a connection 43 from the compressor to the condenser. I

`The well 33 has a' drainage'foutlet 44, connected to a trap ZIB, which spills on the rgauze materialr into the pan 28.

A fan i6 is provided-for circulating vrefrigerated airpast the coil 34, and through the 'chamber' 5. This fan is on a vertical Yshaft coaxially' ofthe weil 33 and' bane' se, said shaft being'dnven by a motor lil secured beneath lsaid well and adjustable unitamy therewith. 'The inner `lining 35 of the well'has anupwardlyfext'ending" iage'48 about the shaft bearing, tor prevent any condens'ate in the well from leaking onto 'the meter. The fan operates within- Vthe lowerAV end ofthe baffle it;l draws air downward throught the 'rei-ieu lated screen I'I, forces it upwardly overtheiimiied coil ist, and yoistirantes fit in al1. dneetins b'e'neai'ihv the'V tr'ay 14g-through whichlitlissuesby wayY ofV the louver's I 81,! I 9,andl'lreturns through the reticulateds'creenwhich ycovers the'V central opening.

The wellv 33 is provided at'the top with' al flat annular plate v139, preferably 'of non heat conductive rnaterial, lto' which the 'inner and 'outer linings aresecured, the upper face 'of 'said plate carrying the yielding circu'tnferent'iall gaskets in adherence thereto, and which gaskets are pressed into sealing relation with the "bottom wall I of the bottle cooling'-clfiainb'er 5; by 'means A of 'the screws" 39. v

VThe numeral-5I represents the usual adjustable' thermostatic switch 'which can be lset to determine the temperature at which'v the refrigerati'ng unit 'shall operate, the elec "ical connections being conventional and therefore not shown. The platform 22 is secured in place by means ofthe angle'clainp 33,'secured'to the 'base of the cabinet near the front, under which the adjacent edge of the platform' is slipped; the'opposite side of the platform 'being' secured by'bolts 52.

In order to removetherefrgerating unit, the tray iii is lifted out through'th'e to'p of the cooling chamber 5, carrying with' it the cylindrical baille It, so that the latter does not obstruct the lateral movement of the refrigerating unit. The bolts 52 are thenremoved and the well 33, together with the coil 34, are lowered by operating the knurled nuts @El so as to lower the screws 39. The refrigerating unit may then be 'slidably taken out through the rear of the-'casing 2, the door II, ofcourse, having been removed.

IThe replacement unit is. inserted by reversing the removal operation, that is, the unit does not have to be lifted any higher than the height of the b'ase'B. It is then. slid'ably pushed into place, the screws being in relatively 'low' position to permitA the gaskets 50 to clear the bottom wall l. The bolts y52 are then replaced. The screws 39 are then screwed upwardly by manipulation of the knurled nuts All until the gaskets have been compressed against the bottom wall 1. The well 33 thus becomes a part of the cooling chamber 5, with the evaporator coil sealed in said chamber while the rest of the refrigerating unit, with the exception of the fan, is outside of said chamber. The tray i4 is then replaced, bringing the baille into position about the fan, and forining with the side wall of the well an annular conduit for the upward passage of refrigerated air. The reactive force created by compressing the gaskets 59 against the bottom wall l, presses the lefthand end of the platform 22 against the base 3, thus obviating the necessity of employing bolts or any other fastening means to hold down the lefthand side of said platform.

In the shop, should it oe necessary7 to remove the fan, this is done by dropping the motor sufficiently to expose the set screw 53 below the well, whereupon by loosening the set screw, the fan shaft may be disconnected from the armature shaft of the motor.

Referring now to Figures 5 and 6, the structure of the beverage cooler l is to all intents and purposes the same as that in the rst described form of the invention, and the tray 541s similar to the tray I4, with the exception that it carries nc cylindrical baffle IS, nor does it have a large central opening. Instead, it has a rather small central opening 55 and is divided tranineerselg,7 in the middle, having a stepped joint This form of invention is designed for the liquid cool ing ofthe bottles, the cooling chamber 5 now functioning as a tank. The motor-compressorcondenser component of the refrigerating unit is essentially the same as that of the rst described modification, comprising a platform 22 on which are mounted the motor-compressor 23, condenser 24, condenser fan 25, and fan hood 26. The platform 22 is secured to the base by lag screws 52, both at its outer and rinner ends.

VIn contradistinction to the rst described form of the invention, the evaporator coil component of the refrigerating unit is not supported by the platform 22, but connected with the motor-compressor-condenser component solely by the fleten ible refrigeration conduits 51 and 58, leading respectively from the condenser and to the compressor.

The coil component comprises an insulated -c1osure'55) for the hole i3 in the bottom wall 's' of the cooling chamber. This closure, similarly to the walls of the cooling unit, has an inner metal lining Sil, and is insulated as indicated at 62. The uppe'r face of the closure 59 is slightly dished, forming a peripheral flange 53. .A pair of inner and outer circumferential gaskets 54, are adhesively secured within the'dishedface of the closure 59, adjacent the peripheral flange, adapted to abut the under side of the bottom wall 1. Said gaskets, when released, are slightly .higher thanl the flange S3, so that when the closure 59 is secured with the flange 53 in contact with the bottom wall 1, the gaskets 54 are compressed,. forming a watertight seal. A tubular vstack '65 coaxial with the closurev 59 and with the hole i3, is secured to the inner face of the closure by means of brackets 65. The lower part of said stack is a water conduit, and has a zone of water inlet openings 51, opening to the cooling `chamber 5, the uppermost of which determines the water level within the chamber l5. The

brackets 66 also support radiating arms 68, which support the turns ofthe evaporator coil 69. The arms 68 on their upper and lower edges, are formed with circular depressions a little deeper than the radius of the circle, in which depres- 'sions the turns of the coil are seated, the metal of said arms at the edges of said depressions `being upset against the tubing of the coil, thereby holding it in place.

The upper end of the stack 65 supports a motor l0, which is secured thereto by means of studs passing through outstanding lugs 1I on said stack. The motor is connected to an impeller shaft l2, carrying the impelier 'I3 at its lower end, the impeller being within the lower open end of the stack 35. The lower end of said stack extends below the coil E9, 'but terminates above the inner face of the closure 59, and functions as a baiile to determine the circulation of water past said coil. f f The closure 59 is secured in place by means of upstanding bolts l, xed to lugs l5, the latter being secured to the upper face of the closure 59. There are two pairs of such bolts, one pair being on each side of the stack, and having their upper threaded ends passing through the opposite ends of angle bars i6, which bridge the hole I3 and rest upon the inner face of the bottom wall 1, and are of such width in a height direction as to support the two halves of the tray. The closure 59 is drawn into sealed relation with the bottom wall 7, by means of wing nuts 'VI on the upper ends of the bolts le which operate against the horizontal ilanges of the angle bars l5.'

The refrigerant connections 57 and 5S pass through the closure 59, and are soldered or brazed to the inner metallic lining 66, so as to produce a watertight joint at this point. A drainage tube 'I8 also passes through the closure 5S, connected to the inner lining 60 in a watertight manner, and extending a short distance below said closure. A short section of hose 19 is clamped to the extended end of said drainage tube and a stop cock connected to said hose. A length of iiexible hose SI is connected to the sop cock and normally occupies an inert posi'- tion within the casing 2. When it is desired to drain the liquid from the cooling chamber 5, the door II is removed, the end of the hose 8l insorted into a bucket and the stop cock opened. Since in this form of the invention there is no condensa-2e, the evaporating pan 23 which is present in 'the rst described form of the invention, is omitted. y

In order to remove this unit from the cooler, the motor 1e, together with the impeiler shaft and impeller, is first removed.' The halves of the tray 541 are then slipped up out of the way or taken out at the top of the cooling chamber. The wing nuts l1 are then unscrewed and removed, freeing the bolts 'M from the angle bars 76.- The closure 55, together with the coil and stack, is now lowered to the base 3 of the cooler. In order to permit the closure with coil to be lowered this distance, there must be considerable' exibility in the refrigerant connections 5'! and 58. This is provided by giving considerable extra length to the refrigerant connections by boiling them in the manner indicated at Bland 83. When the coil component of the refrigerating unit has thus been lowered, the entireunit may be slipped out laterally in the same manner as described in conneclion with the first modification.

To reinsert a, replacement unit, the removal procedure is reversed.

by said tray extending within said annular coil about said fan having its lower end terminating above the bottom of said well and its upper end opening into the part of the refrigerated chamber above said tray, said fan developing recirculation of air from said refrigerated chamber, through said baille, about said coil and through said tray, said refrigerating unit being removable or replaceable as a unit without breaking said connections, after temporary removal of said tray with said baffle, by adjustably lowering said well and coil to clear said bottom wall and sliding said unit laterally with respect to said compartment.

4. In refrigerating apparatus of that type which includes a refrigerated chamber above a laterally accessible compartment for receiving a refrigerating unit, said refrigerated chamber having a bottom wall with an opening therethrough communicating with said compartment, a refrigerating unit for said refrigerad chamber housed in said compartment comprising a base supporting the conventional instrumentalities and conduit connections therebetween constituting a Carnot type refrigeration system, said instrumentalities including an evaporator coil, means forming a closure for said opening unitary with said coil and between said coil and the other instrumentalities of said system, said coil and closure being movable relative to said other instrumentalities through the flexibility of said connections without breaking said connections, and screw and nut means between said base and closure, supporting said coil and closure from said base, reacting oppcsitels7 against said base and closure, for raising said coil and closure as a unit relative to said base to bring said coil in registry with said opening and said closure into sealing contact with said bottom wall peripherally of said opening whereby said coil is sealed within said refrigerated chamber, while the other instrumentalities of said system are excluded therefrom.

, 5. In refrigerating apparatus of that type which includes a refrigerated chamber above a laterally accessible compartment for receiving a 'refrigerating unit, said refrigerated chamber having a bottom wall with an opening therethrough communicating with said compartment, a refrigerating unit for said refrigerated chamber housed in said compartment comprising the conventional instrumentalities and conduit connections therebetween constituting a Carnot type refrigeration system, said instrumentalities including an annular evaporator coil, means forming a dished closure for said opening unitary with said coil and between said coil and the other Iinstrumentalities of said system having its dished side toward said coil, said coil and closure being movable relative to said other instrumentalities through the flexibility of said conduit connections without breaking said connections, a motor on'the lower side of said closure carried thereby having its shaft extending through said closure and an impeller on said shaft extending within said coil, a tubular baille between said impeller and coil, and means between said base and closure supporting said coil and closure, for raising said coil and closure relative to said other inf strumentalities for bringing said coil intoregistry with said opening and said closure into sealing engagement with said bottom wall peripherally of said opening whereby said coil is sealed within said refrigerated chamber, while said other instrumentalities are excluded therefrom.

6. Refrigerating apparatus as claimed in claim 5, said closure having the form of a well rsurrounding said coil.

7.' In refrigerating apparatus of that type which includes a refrigerated chamber above a laterally accessible compartment for receiving a refrigerating unit, said refrigerated chamber having a bottom wall with an opening therethrough communicating with said wall, a refrigerating unit for said refrigerated chamber housed in'said compartment comprising a base supporting the conventional instrumentalities and conduit connections therebetween constituting a Carnot type refrigeration system, said instrumentalities including an annular evaporator coil and a condenser, means forming a closure for said openingY unitary with said coil and condenser and between said coil and the other instrumentalities of said system, said coil, closure and condenser being movable relative to said other instrumentalities through the exibility of said conduit connections without breaking said connections, a motor on the loWer side of said closure, carried thereby, having its shaft extending through said closure, within said coil and an impeller on said shaft operating within said coil, a tubular baille between said impeller and coil, said condenser being carried by said closure, a fan on the opposite end of said motor shaft adjacent said condenser, and screw and nut means between said base and closure, supporting said coil, closure and condenser for raising said coil, closure and condenser relative to said other instrumentalities to bring said coil into registry with said opening and said closure into sealing engagement with said bottom wall peripherally of said opening whereby said coil is sealed within said refrigerated chamber, while said other instrumentalities are excluded therefrom.

8. In refrigerating apparatus of that type which includes a refrigerated chamber above a laterally accessible compartment for receiving a refrigerating unit, said refrigerated chamber having a bottom wall with an opening there.. through communicating with said compartment, a refrigerating unit for said refrigerated chamber housed in said compartment, comprisinga `platform supporting a motor, compressor and condenser, a closure for said opening, an annular evaporator coil mounted on the upper side of said closure, spaced therefrom, flexible conduit connections between said coil and said compressor and condenser, securing means coacting with the upper side of said bottom wall for fixing said coil within said opening and bringing said closure into sealing engagement with the lower side of said bottom wall peripherally of said opening, a .tubular baffle supported upon said closure extending through said coil into said refrigerated chamber, having its lower end spaced from said closure and being apertured in a Zone intermediate its length, a removable motor on the upper end of said baille having a shaft extending through said baille, an impeller on said shaft at a point below said apertured zone, the overall height dimension of said closure including saidtubular baffle being less than the height of said compartment.

9. Refrigerating apparatus as claimed in claim 8, said securing means comprising bars bridging said opening resting on the upper side of said bottom wall, bolts secured to said closure extending through said opening and through said bars, and nuts on said bolts coacting with said bars 11` Y Y to effect clamping pressurey between said bars and closure against said bottom wall,' Q10'. In refrigerating. `apparatusyofgthat type which includes a; refrigerated chamber above alatera'lly accessible compartmentvfor receiving Aa refigerating unit, said refrigerated chamber having a bottom, wall with an,op ening there; through communicatingv withgsaid compartment', a'refrig'erating unit for saidrefrigeratedchamber housed in said compartment comprisingA a base supporting the conventionaL instrumentalities and conduit connections therebetween constitut-A ing a; Carnot type refrigeration system, said in-V strumentalities including an evaporator coil,- meansv forming alclosure for said opening unitary with said coiland between said coil andthe other instrumentalities of said system, saidcoil and closureVv being `movable relative t Said V otherv instrumentalities through the flexibility of said connections without breaking said connectionsi and means adjustable lengthwisebetween said base and closure,vv supporting said coil and closure fromsaid base and reacting oppositely; against said base and closure, and reacting againstsaid base and closure, forraising said coil and closure asia unit to bring said coil in registrywith said opening and said .closure into sealing contact with said bottomvwall peripherally of said opening whereby said coil, is sealed within said refrigerated chamber, while the other instrumentalities. of said system are excluded tlfierefrom,r

11. In refrigerating apparatus of that type which includes a refrigerated chamber above a laterally accessible compartment for receiving a refrigerating unit, said refrigerated chamberhaving a bottom wall with an opening therethrough commimicating with said wall,- a ref rigeratingwunit for said refrigerated chamberhoused in said compartment comprising a base supportingthe conventional instrumentalities andcgmduitl connections therebetween constituting a Carnot type refrigeration system, said -instrumentalitiesinclu'ding an annularevap'orator coilwand `a condenser, means forming' a closure for said opening unitary with said` coi1 and condenser and between said coil and the other instrumentaiities of said system; said coil; closure and condenser being `movable relative, toy said other instrurnen talities throughA the exibility of said conduit yconnections without' breaking said connections, a motor on the lower side o f said closure,ecar ied thereby,` having itsshaft extending throughsaid closure, within saidcoil, and an impelleron said shaftoperating within said coil,` a tubular -bafile between said impeller and cqil, Asaid condenser being carried by said closure., a fanjon theppposite end of said motor shaft adjacent said condenser, and :means between said base and closure, supporting said coil, closure andcondenser for "aising said coil, closure and condenser relative to' saidother instrumentalities to bringV said coil into registry with said opening and said closure intose'aling engagement with'said'bottom wall vperipherally of said opening wherebyA said coil is ealed 'within said refrigerated chamber; while said other instrumentalities are excluded there'- frn Y l 12. In refrigerating apparatus of that type which includes a 'refrigerated chamber above a laterally accessible compartment -for receiving a re'frigrating unit, said .refrigerated chamber lia-ving a bottom wall with an opening there: tiiiugncommunicating with said compartment,

rfrigcratifi'g for Said refrigerated 'Chamber housed in said compartment, comprising a i 12 platform supporting a motor, cfnpessi" condenser,y a closure for said opening; anariil evaporator coilmouted on the upper'sid'e of'sa closure, spaced therefrom, Heiblecnduit co nect-ions between said coil`"ar1d`said cor1"prss and condenser, se `zurir1gl means cactin'g witht 'l upper side of said bottomv wall Vfor 'X coil Within said opening andbr'inging said c into sealing engagement with the lower Vside' saidbottoin Wallperipherally of vsaid" cpe e tubular baille supported upon said closure exten in gthrough said coil into said vrefrig'eatec a ber, having its lo Yer end spaced from said c sure and being apertured in a zone inter its length, aremovable' motor on' the ii'ppJ of said baffle 'having' a shaft extending thr g said kbaiileuand an irn'pell'r' ori said shaft atapoint below said napertured Zone ,13,2111 refrigerati@ apparatus' of' that t whicwhiincludes a refrigeratedY chamber above ai laterally accessible compartment for rec 'ving5 ai refrigerating unit, said refrigerated cham ha L ing a bottom wall with anopen'ing' therethroug communicating with said compartment', a rfrigi eratin'g unitefor said refrigerated chamber housed in saidrcomp'artment comprising the'conveti `"l" instrumentalities and cnduitconnetins the between constituting a Carnot type refrigeration system; said instrumentalities including an ann i lar evaporator coil, a vfor receiving cori'd sate fromuthe surface of said evaporator means forming adished closure for said i'( unitary with saidcoil adbetwe'en 'said co4 A S the other instrumentalities of Msaid' system a d said pan, having its dished side toward said coil, said coil and closure being' 1r'rvabfle'relative t" said other instrumentalities through the fi bill ity' of said conduit connections without said connections, a motor on the lo er side of s d closure carried thereby liavingV its shaft ext i ing through saidkclosure andan imperlie shaft extending within said coil, atub between saidimpeller and coil, a draina' nl -cmmunicatingwwithgthe dished side' of said closure discharging into said pan,l andY tween saidbase and, closure supporting saidv and closure,- for raising said coil andclosre rel: ative to sais other instrumlitaiines for'b g said coil intoregistryV 'with said openi closure into sealingengagmerit lwith said bcttcii wall peripherally of said opening wher A s` d coil is sealed within said refrigerated ch while said other instrumentalities are ecluded therefrom; j

1 4. In refrigeration apparatus f that type which includes a refrigerated chamber adjac rit a laterally Aaccessible compartmentf rceiv g a refrigerating unit, said refrigerated chamber having awa'll with an opening 'therethrough communicating with said compartment, are# v :rigerating unit forv s aid chamber housd'iri said compartment vcomprising l a `motorc`i pressercondenser component and an evapo a;- tor coil component, with refrigerant 'c'idiit connections lbetween said components, saidrcfrigerating unit being removableor replaceable as a unit laterally from or into said cci'- 'partment without breaking said connections, said coil component including a closurefor said opening between said coil yand motorecomp'ressor-L condenser component, said coil being mountcl on said closure, a tubular open endedbal'e f smaller cross-sectional dimensions than said opening extending through said-coil, anda within said baie for re-circulating fluid heat exchanging medium over said coil and through said chamber, and means for moving said coil component independently of said motor-cornpressor-condenser component to bring said closure into sealing contact with said wall peripherally about said opening whereby said coil is sealed within said refrigerated chamber while said motor-compressor-condenser component is excluded therefrom.

15. In refrigerating apparatus of that type which includes a refrigerated chamber having a laterally accessible compartment for receiving a refrigerating unit, said refrigerated chamber having a bottom wall with an opening therethrough communicating with said compartment, a refrigerating unit for said refrigerated chamber removably mounted in said compartment, comprising a base supporting the conventional instrumentalities and conduit connections therebetween which constitute a Carnot type refrigeration system, said instrumentalities including among others an evaporator coil and motor, means forming a closure for said opening unitary with said coil and between said coil and the other instrumentalities of said system, the motor being carried by said'closure on its lower side, and having its shaft exnding through said closure adjacent to said coil, an impeller on said shaft on the coil side of said closure, said coil, closure and motor being movable together relative to the other instrumentalities through the exibility of said conduit connection without breaking said connections, and adjustable elevating means between said base and closure, supporting said coil, closure and motor from said base, reacting oppositely against said base and closure for raising said coil, closure and motor as a unit, relative to said base, to bring said coil in registry with said opening and said closure into sealing contact with said bottom wall periphery of said opening whereby said coil is sealed within said refrigerated chamber While the other instrumentalities of said system are excluded therefrom.

WILLIAM E. ANGLIN.

REFERENCES CITED rThe following references are of record in the y ille of this patent:

UNITED STATES PATENTS Number Name Date 2,204,804 Heintzen June 18, 1940 2,241,023 Tanner May 6, 1941 2,245,234 Tanner June 10, 1941 2,250,612 Tanner July 29, 1941 2,387,622 Tanner Oct. 23, 1945 2,407,159 Jones Sept. 3, 1946

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