Патент USA US2405834код для вставки
Aug. i3, 1946. 2,405,834 H. W. KLEIST DEVICE FOR FREEZ‘ING FooDs Filed-Dec. 29, 1941 5 Sheetsf-Sheet 1 .LNA N _ KU? 75 w 17 Aug@ 13» 3946» - ~ H. w. KLEls-r - _ DEVICE FOR FREI'ÍIZING FOODS _' Filed Deo. 29, 1941 . , 2,405,834 i 3 Sheets-Sheet 2 a“ F572' 3.9 50 i „ _ V ' A , 39 29 2a 20a I- _______ __ jíerffzasn if jíZezLvSt Aug. 13,L 1946. 2,405,834 H. w. KLEIST DEVICE FOR FREEzïNG FooDs Filed Dec. 29, 1941 3 snee’ts-sheet s It@ 5. "_ 56a __ _ __ a, ._ __n-«Í Patented Aug. 13, 1946 ¿naar Unirse sr 2,405,834 DEVICE Fon FREEZING Foons Herman W. Kleist.Chicago,- nl., assigner to noie Refrigerating Company, Chicago, Ill., Va corpo ration of Illinois Application December 29, 1941, Serial No. 424,741 2 Claims. (Cl. 62-102) l 2 ’I‘his invention relates to devices for freezing drawn and closes when the air withdrawing device is disconnected. There is` a plug H screwed into foods and has for its object to provide a new and improved device of this description. ` the nipple 'l which closes the connection so as to The invention has as a further object to pro vide a device for freezing foods by means of con duction combined with air circulation. ' prevent the air from entering,v thereby causing the lower pressure within the plate to be maintained. The above described structure is particularly advantageous for the use of plates partially filled f The invention has as a further object to pro vide a device for freezing foods by means of which with a eutect'ic solution. With referencefor ex the time required for freezing is greatly reduced. ample to Figures 3 and 6, when the plug il is The invention has further objects which are 10 initially removed and the ball raises, any suitable more particularly pointed out in the accompany liquid may be poured into the plate space through ing description. > f the passage 8 until the space between the plates ' Referring now to the drawings, Fig. 1 is a ver is partially filled. IThereafter the ball 9 or its' tical sectional view through one form of device equivalent is positioned in place and the space embodying the invention; between the plates `which contains eutectic solu Fig. 2‘ is a sectional view taken on line 2_2 of tion is partially exhausted and the plug ll is re Fig'. 1; ' turnedy in place; Fig. 3 is a sectional view through a plate nipple for use in removing air from between the plates; Fig. 4 is a view of one of the plates with a por tion of one sheet broken away; ' Fig. 5 is a view similar to Fig. 1 showing a modi ñed construction, where the food is located in a The ball 9 then serves as a check valve preventing the entry of air into the evacuated interior of the plate. 20 ' The plates 2, 2a, 2b, etc., are mountedA in any desired manner. As herein shown, these plates kare preferably mounted in a horizontal position. The plate 2 is preferably arranged at the top of the’receptacle. The plates 2a, 2b, etc., are pref-à Fig. 6 is a sectional View taken on line 6_6 of 25 erably arranged so that the food to be frozen mayFig. 4. . separate freezing chamber. be placed on top of these plates. The plates `are Like numerals refer to like parts throughout the several figures. Referring now to the drawings, there is illus also preferably arranged in staggered relation. There are spaces I2, I 2a, |2b, I2C, i242, etc., above plurality of refrigerating plates 2, 2a, 2b, 2c, etc. heights to be placed therein and still have a space for the circulation of the cold air. These spaces the plates. These spaces are preferably of dif trated a cabinet or receptacle I, provided with a 30 ferent heights to permit food material of different These plates are vacuum plates and are`made up of `two comparatively thin metal sheets 3 and 4. are preferably arranged to form a continuous Located between these sheets is a pipe 5 formed passageway. The space l2 is connected at one into a coil. extending back and forth between the 35 end with the space l2a by the opening i3; the sheets. The sheets are hermetically sealed at the space I2a is connected at the other end to the edges so as to form an air-tight receptacle. The space |213 by the opening Hl; the space i211 is pressure of the air on the inside of this receptacle connected at its other end by the opening i 5 with ls reduced so that the greater external pressure the space I2C; the space I2C is connected at its causes the sheets'to make good heat conducting other end by the opening I6 with the space i203; contact with the pipe 5. ' the space I2d is connected by the opening il with For'this purpose, some means is provided by the space I8; the space I8 is connected by the .means of which air may be removed from between opening l5 with the passageway 2G extending the sheets 3 and il. As herein shown, a nipple 'I along one end of the receptacle i and this pas is provided which has a passageway 8 connecting 45 sageway is connected to the space l2 between with the interior of the space between the sheets plates 2 and 2a by the opening 2l. An air mov S and 13. There is a check valve 9 for closing this ing device 22Vis preferably arranged in the open passageway. Above the check valve 9 is an en ing 2l and is operated by a motor 23. The pas larged part ie which has an internal screw sageway 20 is bounded by the end wall of *he re thread. An air removing device is connected ceptacle l and the plate 20a. with this enlarged portion so that sufñcient air The plates 2, 2a, etc., are connected to a refrig may be withdrawn from between the sheets 3 erating apparatus 245 of any of the usual types and il to secure the desired pressure Contact be containing a compressor 25, a condenser 26 and tween the sheets 3 and ¿l and the pipe 5. The a motor 2l for operating thefcoinpressor. A pipe check` valve 9 opens to permit the air to be with 55 28 leads from the condenser to one of the plates, 2,405,834 3 as for example, the plate 2. There is the usual expansion valve 29 in this pipe. The pipe 23 connects with the pipe 5 in the plate 2. The pipes 5 in the different plates are con nected together so that the refrigerant may pass through the pipes 5 in all of the plates. As herein 4 frozen as shown in Fig. 1 is placed on the plates 2a, 2b, 2c, etc. The refrigerant is circulated through the pipes 5 of these plates by means of the refrigerating apparatus 2a so as to cool the plates down below freezing. YThe air moving de vice 22 is operated and the cold air is circulated back and forth between the plates and above the shown, these connections are made by the pipes food thereon, and when it reaches the bottom 35, 3|, 32, 33, 34 and 35. plate this cold air passes through the opening I9, There is preferably a storage compartment 36 separated from the receptacle I and in which 10 up into the passageway Ell and back to the air moving device 22. foods may be stored after they have been frozen. 'I‘he food is frozen by contact with the plates There is a plate 2f in this storage compartment and is also frozen by the cold air striking the and the pipe 5 of this plate is connected by the food as it is circulated by the air moving device 22, pipe 35 to the pipe 5 in the plate 2c. The plate In Fig. 5 the cooled air which is circulated be 2f is connected by pipe 31 with the compressor 25. tween the plates is then discharged into and cir While the plates may be suspended in any culated through the storage chamber 36a. desired manner, I have provided a simple, cheap I have found that by means of the simul and effective means for accomplishing this. In taneous cooperative action of the freezing plates this construction, one of the sheets of which each plate is made is larger than the other so as to 20 and the circulating cooled air the time required to freeze the foods is decreased very materially, provide a projecting edge 3a. Angle irons 39 are and I have found this decrease in freezing timel placed on the wall of the receptacle I and the to be from 30 per cent to 50 per cent depending plates are supported on these angle irons by upon the food frozen. means of the projecting edges 3a (see Fig. 2). After the foods are frozen they are removed The refrigerating apparatus 24 may be located 25 from the plates and placed in storage chamber 3B, in any place desired. It would ordinarily be and other foods placed on the plates and frozen. located outside of the receptacle I and the stor This device, therefore, very greatly increases the age compartment 38 and would usually be lo efficiency in freezing foods by thus decreasing cated in the basement of the building. In Fig. 5 I have shown a modified construction. 30 the time it takes to freeze the foods soi-.hat a much larger quantity of food per day can be frozen and In this construction the cabinet I is provided placed in the storage device. It is of course with a plurality of refrigerating plates 2, 2a, 2b, evident that a series of storage devices may be 2c, etc., with spaces between them, and an air moving device 22 to move cooled air back and used in order to take care of the food frozen on forth through the spaces between these plates. 35 the plates in the receptacle. By providing a clearance between adjacent These plates are connected to the refrigerating plates which decreases progressively toward the apparatus in the usual way, as shown in Fig. 1. air discharge end of the series of plates, I cause This construction is particularly adapted for use a progressive increase in the speed of movement in connection with ice cream. The ice cream, in this case, is not frozen or kept frozen on the 40 of air between the plates, and also compensate for the volumetric change due to progressive cool plates, but is placed in the storage compartment 36a. - ing of the air. The use of the above described ar In this construction, instead of having the cool air pass under the plate 2e, it is directed from the passageway IT through an opening 4I! in the partition 4I and passes into the freezing cham rangement economizes on space. Small packages placed between the closer spaced shelves are more and then this cold air, the temperature of which gered relation and adapted to form, with the walls of said compartment, a devious path for air, each said plate including upper and lower smooth sur faced metal sheets, whereby the passages defined between adjacent cold plates have smooth upper rapidly frozen, being subjected both tothe action of the plate on which they rest and to the action of the closely spaced shelf above. ber or chambers 35a so that the material to be I claim: cooled therein is immersed in the cold air and l. In a freezing and storage assembly for frozen this cold air then passes up through an opening 42 in the partition l!! and thence along the pas 50 foods and the like, a quick freezing compartment and means for quick freezing material inserted sageway 20 back to the air moving device 22. By therein, including a plurality of vertically spaced means of this construction the air is cooled to a generally horizontal cold plates arranged in stag very low degree as it passes between the plates may be below the freezing point, passes into the l freezing chamber so as to freeze the material therein. When it is such material as ice cream, the ice cream can be kept at the proper desired and lower walls, means for circulating a volatile 'I'he speed of the air moving device 22 may be 60 refrigerant through said plates, and means, ar temperature. -varied to move the air at a slower or faster speed, depending upon the cooling condition desired. By having the plates smooth, it is not necessary to defrost the device as very little Vfrost will de posit on the plates and Whatever does deposit can be easily and quickly scraped off while the refrigerant is `being passed through the plates. By means of the air moving device the tem perature in the freezing chamber may be reduced to from 10 to 30 degrees below zero. Access may be had to the receptacle I by means of doors 43 and access may be had to the storage chamber 35 or 36a by means of doors 44. ranged to cooperate with said plates, for circulat ing air along the path defined by said plates, and an additional storage chamber having an air pas sage connection adapted to admit air from the quick freezing cabinet, and an air discharge con nection adapted to return used air to the air cir culating means. 2. In a freezing and storage assembly for frozen foods and the like, a quick freezing com partment and means for quick freezing material inserted therein, including a plurality of ver tically spaced generally horizontal cold plates ar ranged in staggered relation and adapted to form, with the walls of said compartment, a devious The operation of the invention is‘as follows: When the device is to be used, the food to be 75 path for air, each said plate including upper and 2,405,834 c. 5 lower smooth surfaced metal sheets whereby the passages defined between adjacent cold plates have smooth upper> and lower walls, means for ' circulating a volatile refrigerant through said plates and means arranged to cooperate with said' plates for circulating air along the path defined by said plates, and an additional storage cham- i ber having an air passage connection adapted to admit air from the quick freezing cabinet, and an air discharge connection adapted to return used air to the air circulating means, the clearance be tween the opposed faces of adjacent plates de creasing progressively toward said air discharge connection. HERMAN W. KLEIST.