US1225682A - Show-case refrigerator. - Google Patents

Description

j. SCHULDE.

SHOW CASE REFRIGERATOR.

APPLCTION FILED AUG2|, 1915. 1922596320 'Patented May 8, 19N.

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JUEN SCHUIJDE, OF ST. LOUIS, MISSOURI, .ASSIGNORVBY MESNE ASSGNMENTS, T

HARRY L; HUSSMANN REFRIGERATOR da SUPPLY COMPANY, 0F ST. LOUIS, MIS- SOURI, A CORPORATION OF MISSOUR.

SHOW-CASE REFRIGERATEUR.

i .eeacea Specification of Letters Patent. Patgnted Emmy 8, 1917,

Application led August 21, 1915` Serial No. 46,686.

To all lwhom t may concern.' Y Be it known that JOHN SCHULDE, a citizen of the UnitedStates, and residing -at`St.

Louis, in the State of Missouri, have invented certain new and useful Improvements in Show-Case Refrigerators, of which the following is a specification.

This invention relates to refrigerators, be-l i ing especially applicable to those. of the dislower temperature than could 'be obtained bythe same amount of `ice alone.

The inventionhas among its objects to remedy objectionable wastage of the refrigerant by providing an apparatus whereby the refrigerative medium is utilized to its fullest extent and a' maximum of refrigeration, from a minimum of refrigerant, is obtained.

Further objects of the invention are to provide a comparatively simple, inexpensive refrigerator wherein a more thoroughand effectual chilling of the air,n at the point of greatest refrigeratiom'is secured; a free circulation of the4 refrigerated air, throughout the entire display vor refrigerator compartment, is maintained; and a practically conf tinuous cooling or chilling of the air, while being thus circulated, is effected.

Still further objects are to eifectually con-v trol the circulatory course of the air through the refrigerator compartment and to utilize the otherwise waste refrigerant for chilling the air while being thus circulated. l

With these and other objects in view, the invention comprises the novel features of construction and combination of parts more fully hereinafter described.'

In the accompanying drawings Figure l is a side-elevation of fa refrigerator embodying the invention;

Fig. 2 is a top plan view of the same; Fig. 3 is a vertical longitudinal sectlon taken on the line 3 3 of Fig. 2;

. Fig. 4 is a detail plan view ofthe drip pan, auxiliary refrigerating pan, and drain trap, .said parts being removed from the refrigerator; Y

Fig. 5 is a detail sectional view'of the. drain trap, the section being taken on line 5 5 of Fig. 4;

Fig. 6 is an enlarged vertical transverse section taken on the line 6 6 of YF ig. 3; and,

Fig. 'Z is a horizontal section through the refrigerating compartment, taken on the line 7 7of Fig. 6.

In accordance with this invention, a re- .frigerating unit, comprising a freezing mixture container and a drip pan arranged below the "container and receiving the brine therefrom, is arranged at one end of a show case compartment. This unit has passages constructed and arranged to permit a circulation of the air therethrough and along the back thereof, and the unit is adapted and positioned to cause a. current of air to kcirculate in a path along `the bottom of the show-case and in a return path along the top of the show-case into the top of the unit.

Referring to the drawings, it will be seen that the refrigerator, which is designed upon the lines of a modern show or display i case, comprises an oblong box or casing l4 having suitably insulated walls and subdivided, iguratively., into-a refrigeratingcompartment 2, preferably located at onevend of the' casing, and a refrigerator compartment 3 coextens'ive with the remainder of the casing, there being set in the top'wall of the latter a hinged lid or door 4 centered over the compartment 2, and a' pair of xedv transparent .panels 5 situated over the com-- partment 4-3, which is adapted to receive the goods to be shown or displayed, while'set in oneside wall of the casing is a pair of transparent panels similar to the panels 5 and in the other side wall a .pair of hinged transparent doors or panels 6 disposed to afford access therethrough to the interior of said compartment 3.

v `Removably'sustained in the refrigerating compartment 2,-to which ready access may be had through door .4, is a container 7 preferably formed of sheet metal and traversed fore and aft by a plurality of tapered tubular flues 8 constitutin air passages opening at their largerends t rough the front wall o for' the compartment 3.

of the container toward the compartment 3, and at their smaller or restricted ends into Ian airspace or chamber 9, suitably formed at' the. rear end of the Container andinade commonv to all `of the fines or passage 8.

, Under this construction there is imparted to thel refrigerative body, consisting of the container and vits contained refrigerant, a

maximum surface area for a given cubicspace, and, in consequence, there 1s offeredy to the air, which may-circulatefreely overy Y. and through this body, by `way 'of passages 8 and chamber 9, a relatively large refrigerat- I ing surface by which a rapid absorptionof heatvfrom, andrapid'and thorough refrigeration of, the air, iseffected.

1 The bottom of the. container is made in r the form of a grate 10, consisting of a series as heretofore, therev exists grave liability of Aof'slats extending across and 'suitably atsuch perfrations becoming clogged and preventing proper escape of the. water,

formed bythe melting ice. 'This objection is overcome by providing the container with the grated bottom, of this invention, which permits free escape of the'water.

` Arranged' 'in the compartment 2 beneath the `mtainer 7, to catch the drippings thereyfrom, lis asheet metal drip pan 12 adapted to overflow at its forward edge ,into the mouth 13 of alhollow overfiow pan or duct and, therefore, an; auxiliary cooling medium 14 likewise made of sheet metal'and, as will later appear, constituting a heat absorber,

l l The pan l14 is adapted to discharge at its forward end into atr'a 15-havin`g a drain 4pipe 1 6, LThe "7 bottoino pan 12 is provided with transverse corrugations 17, and is pitched atl a- 'general forward, and lupward inclination,

thus adaptingit to accommodate and hold 'a quantity of the water, dripping from the "container,v before finally overflowing into the/ vertically disposed; mouth of the overgeneral forward and downward inclination and -is arranged to extend along the bottom vofthe casing'1 longitudinally through the :compartment 3, and has its relatively `spaced 'upper and lower walls provided with coinconnected by, side plates 18', which rest at 'The upper and lower cident corrugations 18, yallfor a purpose which will more fullyhereinafter appear, orrugated plates of pan 14 are attached along their edges to, yand their lower edges on the bottom of the cas ing for properly supporting the pan therein.

'Attached at its upper edge to the front wall of thecontainer, and at a point. below Laassa bestos filling.l This shield, from its point of attachment, lextends outward and away from the container wall, andI at a slight inclination-downwardly and forwardly to proi vide an intervening air space or passage 20,- while arranged to extend longitudinally of; the compartment'y 3 is ,ahorizontah metal shelf 2 1, which terminates at `its forward end l'short of the adjacentwall of said c om-` partment, to provide an air pass 22, and at vits rear end joins the lower'edge of the ybaflie 19, and, thus, forms in effect, a continuation of the latter. The shelf 21 is disposed above, and in spaced relation to, the p an 14 to provide an air passage 23 directly over the latter, and is suitablysustained by side cleats or brackets 24.

Disposed in the' compartment 3 suitably above the shelf 21 is a slatted or grate-like shelf 25, supported by brackets' 26 and adapted to receive the goods to' be displayed and refrigerated, and to permit free passage of the l cold air therethrough for circulation over and around said goods.j

In practice door 4 of' compartment 2 may be opened and the container 7 filled with-a .suitable refrigerant, preferably suchas de-' scribed, and the goods to be preserved and displayed having been introduced into compartment 3, through the doors, andproperly arrayed on the shelf 25, the' doors are all properly closed and refrigeration begins. The warmer air within the casing naturally rises and travels rearwardly toward the refrigerative body, and as the two uppermost passages 8 open above the'baiiie 19,

into the compartment 3, acurrent of air` from the latter will flow through said passages and into the chamber 9. At this point it is to be noted that,lbecause of the tapered flues havinor their larger ends disposed outwardly, a ree'passage of the air into and through these fiiiesis induced, and further, that A the air entering the ues becomes chilled 'and contracts, for delivery, in such contracted condition, through the smaller or restricted ends ofthe lines into the chamber 9, where it will undergo a. further chilling and consequent contractionQand finally pass from said chamber into the other'flues Aof the series and outward therethrough into 'space 20.4 During its outward passage, the chilled or refrigerated air, first enters the flues at their smaller ends in a highlycontracted state, and will, therefore, as it flows through the vnow gradually' widening passages, be relieved of compression and allowedto suddenly expand with a resultant lowering of its temperature, and as this air is nowat the point of greatest refrigeration,

it will be thoroughly and eectually chilled shelf, isprevented.

Laaaeea and rareed. A'Upon escape from the passages 8 into the space 20, the refrigerated air is directed by thebaies 19 and 21 throughy the passage 23, to the air pass 22, through which 4it passes into the refrigerator compartment 3, beneath the grated shelf 25, Which, owing to its latticed formation, permits free circulation of the'air around the goods, and final free return of the air tothe upper flues 8.

It is to be noted that the cooling'or refrigerating action is effected Wholly by a current of highly rareied and chilled air traveling along and f through the refrig 'the' current of cold air in its travel tprough the passage 23, thus to obtain its ful eHect in refrigerating the compartment 3.

f v It is apparent that, under this invention,

there is produced an efficient refrigerator, of the show casev type, in Which provision is lmade for a thorough utilization of the refrigerant, and by which the other stated objects are fully accomplished. In attaining thesel ends the invention is not necessarily restricted to the details herein shown and described, and various minor changes may erator compartment,vand that any moisture l is claimed is:

' of condensation which might form in said compartment vvvill be taken up and ,carried olf by this 'air current'andbe deposited in the flues 8-and `chambeiduring the periods of sudden chilling of the air Within these parts, asbefore explained, and as Will be obvious. The refrigerator compartment is thus kept dry and the deposit of moisture, bearing the odor or flavor of one food be vmade .in such details Without departing from the spirit or scope of the invention.

.Having thus described the invention, what 1. A counter refrigerator comprising an Sol elongated' show-case having transparent panels, a refrigerating-unitincluding container adapted to receive a freezingmlxture vand mounted at one end of said shd'vcase,

article upon other food articles on the frigerant 11 and the Water thus formed drips freely through the grate 10'into the underlying pan I12. As this water is, however, suiiciently cold to materially aid in the' chilling or refrigeration of the air, the pan is constructed, as described, to accumulate and hold a quantity of this Water as an auxiliary refrigerative medium, disposed to act upon a current of air delivered fromv the lowerend of chamber 9, While the overflow from the pan 12 is received by, and accumulates in, the pan 14, which is thus maintained at a sufficiently loW temperature to act as a heat absorbent and as a: further refrigerative auxiliary for cooling the air Within the compartment 3, it being noted that, inas` much as the element 14 is disposed for direct said container having a vertical passage at the back thereof and having tubes passing therethrough Aand open at their rear ends to said vertical passage and at their for-` ward ends to said show-case, constructed and arranged to permit a circulation of a1r through the unit and along the back thereof, l'

and said unit being adapted and positioned to cause a current of air to circulate in a path from the bottom of -said unit along the bottom of said show-case and in a return path along the top of the show-case into' the topof said unit.

2. A counter refrigerator comprising an elongated show-case having transparent panels, a refrigerating unit including a container adapted to receive a freezing mixture and mounted at one end of said show-case, and a drip pan arranged below the container and receivingthe brine therefrom, said container havinga vertical passage at `the back thereof and having tubes passing therethrough and open at their rear ends to' said vertical passage and at their forward ends to said show-case, constructed and arranged to permit a circulation of air contact with the air current iowing through passage 23, it Will act more particularly for maintaining the low/,temperature of-said air current.

As a resultof providing the pans 12 and 14 .with the transverse vcorrugations 17 and 18, respectively, these elements are given a maximumsurface area, are adapted to be more readily and eifectually chilled under the action of the cold water, and the corrugations 18 may act as baffles for retardmg through said unit and along the back thereof, and said unit being adapted and positioned to cause a current ofair to circulate in a path from the bottom of said unit along the bottom of said show-case and in a return path along the top of the showcase into the top of said unit.

f3. A counter refrigerator comprisingan elongated show-case provided with transparent panels, a refrigerating unit adapted to receive a freezingmixtureand mounted at 2one end of lsaid show-case, said unit having passages constructed and arranged to permit a circulation of air therethrough and `along the back thereof, and said unit being adapted and positioned to cause a current of air to circulate in a path from the bottom of said unitalong the bottom of the showcase and in a return path along the top of the show-case into the top of said unit, and

a pan extending along the bottom of the' show-case beyond said unit and adapted to, receive the brine from said unit.

4. A counter refrigerator comprising an elongated show-case having transparent panels, a refrigerating unit adapted to receive a freezing mixture and mounted atl one end of said show case, said unit having y passages constructed and arranged to perdirect said current-of air.

y partment adapted to receive a refrigerative body,.said body being provided with open ended passages each opening at one end toward said refrigerator compartment, the

said passages having their;l other ends terminating and adapted for con'ii'nunication with one another within said body, whereby the air being refrigerated will pass from one to another of said passages without f' leaving the said body. i A

6. A refrigerator comprising a casing having a refrigerator compartment and a compartment adapted to receive a refrigerative body, said body being provided with open ended .tapered passages having their larger q ends disposed toward said refrigerator compartment and their smaller ends terminating, land'adapted for co munication with one another, within said body, whereby the' air being refrigerated will pass from one to another of said passages .without leaving the said-body. v

' 7. A refrigerator. comprisinga casing'having a refrigerator compartment and a compartment adapted to receive a refrigerative v-bod}`f,-..said body having a chamber inclosed therein and being providedwith a plurality of open ended tapered passages having their larger ends disposed toward Said refrigerator compartment and theirl smaller ends opening into said chamber, whereby the air being refrigerated 'will pass within said chamberl from one to another of said passages without leaving the said body'.

8. A refrigerator comprising a casing having a refrigerator compartment, a container mounted in said casing and adapted to re-i ceive a refrigerant and constituting a refrigerative body,v said container having a chamber inclosed therein and being provided with aplura'lity of open ended tapered passages having their larger ends disposed toment and their smaller ends terminating,

and adapted for communication with one another, within said body; wherebyv the air being refrigerated will pass from one to .another of said passages without leaving said body, and a baffle interposed between the forward ends of certain of said passages and the refrigerator compartment.

10. A refrigerator comprising a casing having a refrigerator compartment7 a re frigerant container disposed in said casing, said container having a chamber inclosed therein and being provided with tapered open flues having their larger ends disposed toward said compartment and their smaller ends., opening -intosaid chamber forl communicationv one with another within said container.' v l l1. In a refrigerator, a casing having a refrigerator compartment, a refrigerant container having a chamber inclosed therein and being provided with a plurality of fore and aft open ended flues opening at their outer ends toward said compartment and at their inner ends .into said chamber for communication one with another within said container, and an insulated baiileinterposed bec tween said compartment and the outer ends of certain of said flues. y12. In ay refrigerator a casing having a refrigerator compartment, a refrigerative body having a chamber and provided with a tapered passage leading from said compartmentthrough Said body and opening at its smaller end into said chamber, said body therethroughand opening at its smaller end intosaid chamber, and a baffle interposed between the larger end of said second passage and said refrigerator compartment.

13. In a refrigerator a casing having a having a second tapered passage leading la. A refrigerator comprising an elongated show ease provided With transparent panels, a refrigerant container inounted at one end of said ease, said container having a chamber inelosed therein and being provided With a plurality of open ended tapered ilues having their larger ends disposed toward said ease and their smaller ends opening into said chamber for oomrnunieation one with another Within said container7 an auxiliary heat absorbent body extending along the bottom of said show ease, said.

body being fed and cooled by Waste from said Container, and a 'baflie interposed between said show ease and the adjacent ends of certain of said flues, constructed and arranged to Cause a Current of air to circulate through said show ease in a path along and immediately above said body7 l5. A refrigerator comprising a show ease provided with transparent panels and having an end compartment adapted to receive a refrigerative body5 said body being provided with upper and lower open ended tapered passages having their larger ends disposed toward said shov7 ease and their smaller ends terminating, and adapted for communication with one another, Within said body, whereby air flowing into the upper passage will, without leaving said body? dow in a return path through said lower passage9 and a'baile between the outer ends of said upper and lower passages, constructed and arranged to direct the return flow of air from said body in a path along, and aeent the bottoni of, said show case.,

ln testimony whereof ll atlx my signature this Aith day of Augusta l9l5- JHN S Tt

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