Патент USA US2411833код для вставки
Nov. 26, 1946. A.L F. McMAHoN 2,411,833 11311161111111411111 APPARATUS Filed .my :5, 194s 1%’ .I L \ \ Y ffy/WZ? ¿ y Nov'. ze, 1946. I A; 'F_ -MCMAHON 2,411,833 REFRIGERATING APPARATUS ' filed Ju1y 5, 1943 ' Y s sheets-Sheet 2 Y z3 2/ I ENTOR. Nov. 26, 1946. 2,411,833 _ A. F._ MsMAHoN REFRIGERATING APPARATUS 5 Shee'ts-Sheet 3 Filed July 3, 1943 v . «fix @y VENToA ‘ „7u 2,411,833MÍ - Patented Nov.¿26, 1946 UNITED STATE s PATENT OFFICE 2,411,833 REFRIGERATING APPARATUS assignor Alexander F. McMahon, Oak Park, Ill., Chicago, to The Bastian-Blessing Company, lll., a corporation of _Illinois Application July 3, 1943, Serial No. .493,369 ' ` 1o claims. (ci. isz-141) ' This invention relates to the method of and apparatus for cooling or refrigerating food prod ucts, and the like. > tion is accomplished in a very few minutes, it has heretofore been necessary for the dairyman to have a copious supply of cool running water, or be provided with a refrigerator having a very ' One of the objects of the invention is the pro vision of a new and improved apparatus for rap - idly _reducing the temperature of foody products, large capacity. Either of these methods of cool ing the milk is more- or less impractical, due either to the lack of cool water or the added cost in op and especially the temperature of beverages, such as fresh milk, and the like, contained in recep erating a large refrigerator. tacles. Another object Aof the invention is the provision of new and improved apparatus for efliciently and fore has been cascaded over cooler coils in con tact with the air and subject to contamination. ^ Another object 'of the invention is to improve from milk without exposing' the milk to contami Moreover, in order 1 to accomplish the cooling rapidly the milk hereto promptly cooling milk after the milking operation. - the sanitation and method of removing body heat 2 drawn milk within avery short time to a prede termined temperature. Since this cooling opera The present invention seeks to eliminate these dimculties by the provision of a smallcapacity refrigerator, and by providing means in the re 16 frigerator for lwhat will be termed storing re nation. A further object of the invention is the provi- - frigeration, or the cooling-effect in the formation of ice, during the portion of the day or-night when power whereby peak tus that has ‘a reserve'cooling the milk is not actually being cooled. to be utilized loads requiring high capacity refrigeration may 20 at the proper time in the rapid cooling of the milk be accommo'dated by an apparatus having a com through heat exchange between liquids. 'I'he sion of a new and improved refrigerating ~appara- . - paratively loweooling capacity. latent heat _of fusion of the ice is especially im portant in this relation, because -it permits the A still'further object of the invention is the provision of a new and improved coolingl system having means for storing refrigeration or the -cooling effect during light loads and using >the same at peak loads; that is simple in construc tion; inexpensive to manufacture; efficient in op apparatus to be so constructed as to occupy av minimum of space and yet store up a large amount of refrigeration in the ice. Referring now to the drawings, the reference character III designates, generally. therefrigera eration; composed of few moving parts; and one . tor or cooling apparatus, which comprises a cab that is not likely to become deranged or get out of order. Other and further objects and advantages of ` the invention will appear from the following de scription, taken in connection with the accom ~ panying drawings in which Fig. l is a front elevation of a cooling or re . frigerating apparatus embodying the invention; Fig. 2 is a horizontal section on- the line 2--2 , ofFig. l; Fig. 3 is a vertical section of the apparatus dur-v ing an intermediate period of its operation; and Fig. 4 is a view similar to Fig. 3, but showing the` device in operation for rapidly cooling a food product. inet II on which is mounted a refrigerating unit I2 and a pumping unit I3 thereon. The cabinet comprises the side walls I4, I5, the back wall I6, ` _ ' In certain classes of work, or in certain occu pations, the use of cooling apparatus is essential, if not absolutely necessary, and to complicate the matter there are peak loads that must be pro vided for where heat exchange has to be com - and the front wall I1. >The front wall has a. door opening therein, closed by a door I8 hinged, as at I9, in the usual manner. Each of these walls and the dem comprises inner and outer wall> members 2| and 23, see Fig. 3, spaced apart, and with a suitable insulation 2l between them. The top wall 25 of the cabinet is provided with an opening 26, closed by a closure 21. Mounted within this opening, and supported therein, and extending downwardly into the interior of the cabinet, is a receptacle 28 for containing a cool 45 ing fluid, such as water, 29. This receptacle ` tapers downwardly 'for facilitating its insertion in the opening when assembling the apparatus. It is supported by laterally extending flanges around its upper edge that engage the marginal structure of the opening 26. These flanges are 50 pleted rapidly. In the dairy business, for instance, enveloped in insulation, as shown. milking occurs but twice a day, usually in the The expansion coils 3l of the refrigerating unit early morning and in the late afternoon or eve I2 are'mounted in the receptacle 28, and-the ning. Becausß of the rapid growth of bacteria in water contained in said receptacle is adapted, milk containing animal heat, many 'states have under certain conditions, to be congealed, as will regulations requiring the cooling of the freshly 55. 2,411,833 presently appear. Mounted within the recep tacle 28, and extending through the bottom there of, are a plurality of castellated overflow ducts - 32, and the lower ends of these ducts are pro vided with what may be termed nozzles 33 for spraying the coolingiiquid when the same over ñows the ducts. These ducts are of `a height less than the depth of the receptacle, so that the cool ing liquid will overñow the same whenthe pump the pump elevates the water from the reservoir 31 and sprays it over the ice in the receptacle, and this water, in melting the ice, has its tem-v perature greatly lowered. This cold water over flows the ducts 32, as shown in Fig. '4, and is sprayed on the tops of the lids 45, which are radially grooved, as at 46, to spread the» ilow evenly, and from there the cold water cascades to the cans. and runs down the sidesV thereof. I3 is operated. Castellation at the top of the 10 The cold water iiowing down in direct contact ducts distributes the flow among the ducts when with the metal of the cans effects a. very rapid more than one duct is employed, and this even heat exchange'and the milk is soon cooled, princi ness of distribution is important in event the pally at the expense of the ice which is soon user does not level the device properly. melted by absorbing heat indirectly'from the milk. Suitable means are provided for supporting food 13 The refrigerating mechanism may continue to containers, such, for instance, as milk cans 34, operate to assist in lowering the temperature of beneath these spray nozzles 33, respectively, as the milk. ’ ì shown'more clearly in Fig. 3 of the drawings. In 'I‘he direct contact of the cooled water with the the construction shown, which is by way of ex ample only, angle bars 35, 36, in pairs facing 20 each other, are provided, and each set of lbars is adapted to support two of these receptacles. 'I'he cabinet may be increased or decreased for accommodating-a greater or less number of cans, as requirements may dictate. The flanges of ' adjacent bars may be welded together at their forward ends and spaced apart at their rear ends so as to space the angles of each pair farther apart at their forward ends, so that the cans may be more Veasily inserted and removed from the cabinets. The bottom wall of the cabinet is provided with a reservoir 31 having a portion of its bottom wall depressed for forming a sump. The floor of the chamber is inclined toward the sump in order that the water, or other cooling liquid, discharged through the nozzles 33 will collect in the sump. Suitable means are provided for transferring the liquid from the reservoir 3l to the recep-tacle 28. As shown, the pump i3 is employed for this purpose. The pump is operated by a suitable motor 38, and this motor also operates a fan 39 which is adapted to cool the condenserfor the refrigerating unit l2, as is usual in such walls of the metal cans- constitutes an excellent heat exchange relation resulting in a veryv rapid lowering of the temperature of the milk, and eliminates open air contamination. The absorp tion of heat required in melting the ice, together with the continued operation of the cooling unit during the cooling period, causes an extremely rapid reduction of temperature of the milk. This is considered an important feature of the inven tion. The latent heat of fusion is such that only a comparatively small space for storage of ice is re quired _in reducing the temperature of the milk, and consequently the refrigerating apparatus is not bulky. Since refrigeration may be said to be stored during a period of .light loads to be utilized during peak loads for assisting in low ering of the temperature of the milk, 'lit follows that the size of the cabinet and the capacity of the refrigerating unit may be reduced toa min imum. v ' In certain sections of the country the milk is collected by the buyer’s truck only once each day, . usually during the morning. In such an event the evening milk is cooled rapidly in the appa ratus inthe usual manner, and is left in the cab constructions. Si'nce the refrigerating unit, the inet during the night. The ice may be al1 melt pump, and the motor for operating the pump are ed by the time this milk is cooled down to the re of the usual or any well known construction, quired temperature, .but once cooled it does not it is not thought necessary to further illustrate take so much cooling effect to maintain 'the milk or describe the same. at the desired temperature, and during the lat The suctioniline of the pump, which may be of 60 ter period the pump does notoperate but ice is the self-priming centrifugal type, is shown at 4|, - frozen in the receptacle by the refrigerating having a foot valve at 4l“ within the depression mechanism in readiness for rapidly cooling the or sump of the reservoir 31 and its discharge line morning milk. If desired, the evening milk may at 42. 'I'he discharge line 42 is provided with a nozzle having a plurality of fine .openings 443 55 have its temperature further slightly reduced just before the cans are removed from the cabinet to which discharges the cooling iluid in a spray make room for the morning milk, so that its over the surface of the congealed water or other temperature will not rise too high while the cooling nuid in the receptacle 28. morning milk is being treated. The usual eve Since milk contains animal heat, and since heat and moisture are conducive to rapid bacterial 60 ning coolness assists in carrying this extra load, if this load otherwise happens to be critical. growth, it is necessary immediately after the. The refrigerating unit is provided with a suit milking operation to cool the milk rapidly down able temperature control for stopping and start to a predetermined temperature in order to mate ing the refrigerating mechanism in response to rially retard this growth. It is during this rapid' the temperature requirement-s of the interior of cooling operation that the peak loads for the 65 the cabinet. This control may be adjusted as refrigerator or cooling apparatus occur. desired by the hand operated switch 30. The Assuming now that the liquid in the receptacle switch for the current for the refrigerator mech 23 is congealed and it is desired to cool four anism is shown at 40, and a switch for the pump cans, 34, of freshly drawn milk. The cans of is shown at 60. Since these switches and con warm milk.„with.lids 45 on them, are slid in on 70 trols are common in the art, it is not thought the supports, as shown in Fig. 3, beneath the necessary to further illustrate or describe the ducts 32, and the door closed. The refrigerator same. ^ unit, if not already running, and the pump are It desired, a time control for the pump may also both started. The refrigerating unit continues ‘ be provided. As shown, this time control 50 is .to cool the coils 3| and cooling chamber, and 75 provided with a chronometer 5|, which may be 2,411,8ss - set to close a circuit through the pump motor at any selected time in the. morning and evening and open the circuit after a predetermined in terval of time. For instance, the switch may be automatically closed at 6 a. m. and 6 p. m., and opened at 7 a. m. and 7 p. m. A manually op erated switch 52 may also be provided for open ing and clo'sing the switch as desired. Since these control elements may be constructed convention 6 cooling fluid from"V said receptacle over -said closures for causing said ñuidl to fiow through said grooves onto the sides of said containers for cooling the contents thereof. 3. A device for cooling food products compris ing `a cabinet for receiving containers having closures thereon, for transporting said products, said cabinet having areservoir in its lower por» vtion provided with a sump, means in 'said cabinet for supporting said containers within said cabinet ' ally, it is not deemed necessary to describe the 10 in a predetermined position above saidv sump, a receptacle for containing a cooling liquid within It will thus be seen that the fresh warm milk said cabinet vertically above said containers, a " is rapidly cooled by the combined action of the refrigerating unit including an _expansion coil refrigerating unit and the 4melting of ice, and within said receptacle for congealing said cooling that the ice. is frozen between the milking periods 15 liquid, a plurality of overflow Aducts for said re when the load on the refrigerating unit is at its ceptacles, one vertically above each of said con minimum. It will also be appreciated that dur tainers, and opening upwardly into the receptacle ing the period the unit is forming the ice the with portions thereof extending above the top pump is not operating. During the ice forming of said congealed liquid; a pump- for pumping period any article or food product that may be said cooling liquid from said sump and discharg placed in the lower `portion of the cabinet is ing the same onto the congealed liquid >in said cooled by convection of air within the cabinet, receptacle for causing the cooling liquid to over and for that reason the cooling liquid in the res flow into said ducts onto said closures and con ervoir does not have its temperature reduced vto tainers for cooling the contents of said contain the freezing point at any time during the oper-y 25 ers, said receptacle extending downwardly into ation of the apparatus. the upper portion of said cabinet for cooling While it is desirable that ice be frozen in the said containers by convection when said pump receptacle and that water be pumped from the is »not operating. , , reservoir to flow over the ice before flowing over " 4. An apparatus for cooling products compris 30 the receptacles, it is understood that the water - ing -a cabinet having a space for receiving one or in the receptacle may have its temperature re more containers, means for removably support duced below that ofÍ the lower portion ofthe ing the same in said space, a receptacle above cabinet but not to the freezing point, if desired, said space to store a cooling liquid in said cabinet, and be utilized- in the same manner as though a reservoir below said space for catching said same.v ' - ` , ice had formed. The cooling will, of course, not ` be as low nor as rapid as it would be Where ice liquid overflowing from said receptacle, refriger ating mechanism for congealing said liquid in _said receptacle, overfiow ducts extending up wardly throughl the bottom wall of said receptacle the water can be changed as often as desired by > and terminating below the plane which includes 40 the upper edge of the receptacle walls, spray the drain plugs 41. is formed. Furthermore, if it is desired that the water be used to wash the outside of the cans, It is thought from the foregoing, taken in con nozzles on the lower ends of said ducts for dis-, nection with the accompanying drawings, that the operation and construction of my device will be apparent to those skilled in the art, and that changes in size, shape, proportion and details ' may be made without departing from the spirit » and scope of the appended claims. - charging said overñowing liquid over the upper 4.5 ends of containers in said space, and means for returning said liquid from said reservoir to the receptacle and spraying the same over any oon gealed liquid present in said receptacle whereby _ said overflowing liquid will absorb heat from the I claim as my invention: Acontents of -said containers and said returned liquid will have said absorbed heat removed fromr tion within a cabinet for cooling a product which 50' it prior to overflowing through said ducts again comprises congealing a cooling liquid in a re and contacting said containers to absorb further ceptacle within the cabinet while maintaining heat from the contents thereof, the location of said cabinet at a lowered temperature, then " said receptacle above the container4 receiving when'an uncooled product is inserted within said space causing convective circulation of the air 55 cabinet spraying a liquid over said `congealed within said cabinet to assist in the refrigeration liquid and said uncooled product for abstracting l of the contents of the containers. heat from said uncooled product, and simultane 5. In a cooling apparatus for rapidly cooling I ously cooling said product by causing the air in products y within containers, the combination of said cabinet to circulate by convection, ñrst across a. cabinet, a refrigerating system including a the container for the congealed liquid and then 60 refrigerant liquefying unit and an evaporator over the container for said product. _ connected to said unit, an apparatus cooperating 2. In an apparatus for cooling fresh milk com with said system for producing a greater refriger prising a cabinet, a refrigerating unit carried by ating effect per unit of time than can be produced 1. A method of storingand utilizing refrigera said cabinet, a receptacle for containing con by said system operated alone, said apparatus- gealed cooling fluid for said cabinet, expansion 65 comprising means for supporting containers in a coils for said unit in said receptacle, metal con- , predetermined space in said cabinet, a receptacle tainers for said milk, means beneath said re in the upper portion of the cabinet above said ceptacle for supporting said containers, said con space with said evaporator disposed in saidv tainers having closures provided with radially receptacle, and means for spraying fluid liquid extending grooves, a reservoir in the lower por 70 over liquid in the receptacle congealed by said tion of said cabinet for receiving cooling ñuid evaporator and then over containers located ,from said receptacle, and manually ycontrolled in said space to extract heat from said containers, means for circulating said cooling fluid over the the arrangement being such that ~said containers upper surface of said congealed cooling fluid are also kcooled by natural convective flow of air in said receptacle, and means for spraying the 75 2,411,883 in the cabinet over them and over the surface of said receptacle when the liquid is not spraying vrapidly reducing the temperature of the contents over the containers. 9. In a refrigerating apparatus for cooling a product comprising a cabinet, means for support ing said product in a predetermined position in 6. A method oflowering the temperature of an of said containers. - ' unchilled article by a secondary refrigerating effect greater per unit of time than the capacity of a refrigerating unit employed as a primary source of refrigeration which includes the steps .the lower portion of said cabinet, a refrigeratinß unit including means for storing and freezing a of congealing a portion of a predetermined sup inet vertically above said position for maintain ply of cooling liquid during the time the appara tus is maintaining an already chilled article at a. reduced temperature and subsequently spraying l the uncongealed portion of said liquid over said congealed portion and over said unchilled arti mass of water in the upper portion of said cab ing said cabinet at a reduced temperature, means for causing a liquid to flow over said ice to be chilled by and to progressively melt the same. and means for discharging said liquid and ice water over said product for rapidly reducing the cle for rapidly reducing the temperature of said 15 temperature thereof. unchilled article, and simultaneously assisting in 10. In` an apparatus for rapidly lowering the cooling said unchilled article by causingjhe air temperature of freshly drawn milk having a cab ' in said cabinet to circulate, in heat exchange re-> inet and a refrigerating system therein including lation with the congealed liquid and with said a refrigerant liquefying unit and an evaporator article. 20 connected to said unit, the combination of an l '7. In a refrigerating apparatus, a cabinet, a apparatus arranged to cooperate with said sys refrigerating unit for said cabinet including ex tem for producing a greater refrigerating eiîect pansion coils within said cabinet,.a receptacle for per unit of time than. can be produced -by said holding a congealable liquid around said coils for system when operating alone, a receptacle ex forming a mass of ice in said receptacle, means 25 ` tending downwardly in the upper portion of said for supporting metal containers within said cab inet beneath said receptacle, means for circulat cabinet for holding a cooling medium around the evaporator for cooling the interior of said cabinet ing water over said ice for melting the same to , and for storingv the refrigerating effect 1n said form ice water and for spraying such water over receptacle between milking times at a maximum the top of said containers for rapidly reducing rate which is below that required for rapidly cool the temperature of the contents of said contain 30 ing the freshly drawn milk, means for supporting ers, and means for automatically removing said . a plurality of containers vertically below said re water circulating means from operation at a pre ceptacle, an overflow stand pipe with a spray in determined time after the start of its operation. its lower end for each container within said re 8. In an apparatus for cooling a product, a ceptacle for spraying the cooling medium onto cabinet, a receptacle in the upper portion of said the tops and sides of said containers, apu'mp for cabinet in which water may be stored, means for transferring said cooling medium after it flows freezing said stored water, means for supporting over said containers back to said receptacle, the ' containers having closures on their- upper ends arrangement being such that said containers may within said cabinet beneath said receptacle, and 40 - be cooled by convective circulation of air so long ‘ means for circulating water over the upper sur as said receptacle contains the stored refriger face of said frozen water and for spraying the ating effect. same onto said closure for said containers for ALEXANDER F. MCMAHON.