US1993328A - Refrigerating apparatus for the storage and preservation of food, delicacies, and the like - Google Patents

Refrigerating apparatus for the storage and preservation of food, delicacies, and the like Download PDF

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Publication number
US1993328A
US1993328A US682692A US68269233A US1993328A US 1993328 A US1993328 A US 1993328A US 682692 A US682692 A US 682692A US 68269233 A US68269233 A US 68269233A US 1993328 A US1993328 A US 1993328A
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United States
Prior art keywords
plate
frame
refrigerating
preservation
refrigerating apparatus
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US682692A
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English (en)
Inventor
Ingvardsen Johan Freder Ingvar
Levring Erik Anders Dalsgaard
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Individual
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04—Preventing the formation of frost or condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D15/00—Devices not covered by group F25D11/00 or F25D13/00, e.g. non-self-contained movable devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • F25D25/028—Cooled supporting means

Definitions

  • the invention relates to a refrigerating apparatus for the storage or preservation of food, delicacies and the like.
  • the part of the refrigerating apparatus which gives off the cold is constructed as a surface located freely in space on which the goods to be cooled can be placed so as to be freely exposed to view, and the cooling capacityof theapparatus is so great that the temperature of.
  • the surface which may be made in any suitable form can be kept so low that white frost is formed thereon.
  • the said surface may be used directly for instance as a table, display board, or the like.
  • the appearance of such a surface is rendered particularly attractive by the valuable, particularly in many shops, restaurants white frost of course is always kept at at least 0 C., it is also possible to produce freezing in a simple manner. Whipped-cream tarts when placed directly on the cooling surface, and in certain cases preferably on a metal dish, freeze on the lower side and thus retain a firm base, and thus the disintegration which is so unpleasant is prevented.
  • the surface which gives off the cold contains chanrator of a compressor refrigerating plant or a guideway for a refrigerating medium (brine, for instance a solution of sodium chloride).
  • a refrigerating medium for instance a solution of sodium chloride.
  • Fig. 1 is a diagrammatical representation of a cooling apparatus according to the invention which operates with a compressor- Fig. 2 shows a plan of a cooling plate used therewith.
  • Fig. 3 shows a method of attaching a pipecoil conducting the cooling agent to the surface plate.
  • Figs. 4, 5, 6 and '7 are cross sections of various forms of construction of the frame embracin the cooling plate and the appropriate method of by a water cooler, in which case the fan 4 mostly may be omitted.
  • the gas SO2,NH3 or the like
  • the condensed by the compressor passes through the piping 6 into the cooler 5, from there passes through the piping 7 and then arrives in the expansion valve (throttling nozzle or the like) 8.
  • the gas shouldbecondensed to a liquid.-
  • the gas expands in the expansion valve 8 in known manner, thus producing cold which is given off to the plate 9.
  • the expansion valve 8 may, of course, be constructed in various manners and may, for instance, alsobe self-regulating. In this case the adjustment can be controlled either by the gas pressureor by the temperature of the plate 9. After the working medium has given off its cold, it flows through the piping 10 to the suction side of the compressor.
  • the piping 10 is of such length, if necessary arranged in one or more coils 11, that the working medium is always able, even when the temperature of the surroundings is low, to give off its excessive cold to the surrounding air, (when this cannot be done completely by the plate 7) before it again reaches the compressor 3. At the same time it is thus also possible to give the plate an inclined position, for instance, because the pipes can then yield sufliciently to permit it.
  • the plate 1 is surrounded by a frame 12 which is insulated from the plate and thus cannot assume a low temperature.
  • the frame extends above the plane of the plate 9 to serve as a border or rim which sharply delimits the frosted area that forms upon the refrigerated plate.
  • Fig. 2 shows how the piping coming from'the expansion valve. may be arranged under the plate 9.
  • the piping enters at 13 and then runs in bent formation along the lower side of the plate 9.
  • the piping 10 leaves at 14. It is recommendable to combine the points 13 and 14 in such a manner that only one opening need be made in the table. It is much easier then to make the tubes fit airtight in the opening, which is very necessary as will be pointed out hereafter.
  • It is, of course important that the pipe coil under the plate 9 should be in good thermally conductive connection with the said plate 9. This can best be done by soldering or welding (for example spot 'welding) when the pipe coil'is made as a sepa- 3.
  • the pipe 15 is soldered to the plate 9 by means of an ample proportion of an I alloy of low melting point (for example Woods or Roses metal).
  • an I alloy of low melting point for example Woods or Roses metal.
  • the advantage of such an alloy is that the soldering can, for instance, be carried out by immersing the plate in hot water. With this-low temperature one may be sure that no buckling, warping or other deformation of the plate 9 can occur, which is very important as naturally the plate 9 must be kept as fiat as possible.
  • Fig. 4 shows how the plate 9 can be secured in the frame 12. On the upper side this plate 9 is surrounded, for instance, by a strip of rubber 16 (in some cases for instance also by a rubber tube filled with cork) against which the plate 9 is pressed by means of thescrews 1'7.
  • the space below the plate 9 and therefore about the pipe coil 22 is filled with an insulating mass lower side. It is of importance of course, that no air can enter into the space between the plates 9 and 24, because if there would arise some air circulation, also white frost would be formed there and this would decrease the cooling action at the upper side considerably, while besides a lot of condensation water could be formed within the insulating mass. Owing to. its large surface the frame 12 can easily assume the' temperature of the surroundings, and therefore does not become covered with white frost, and does not even become coated with moisture.v
  • the plate 9 is coated with nickel and then sanded, while the frame 12 may be coated with chromium, so that a very bright appearance is got together with the layer of white frost.
  • the frame 12 is best made in the manner of extruded metal.
  • the plate 9 is clamped between two strips of rubber 25 and 26, which are held in place by small blocks of wood 27, cork plates 28 being interposed if necessary.
  • Fig. 6 shows a further form of construction.
  • the plate is clamped between two strips of rubber 29, 30.
  • the plate 9 can again be adjusted by means of screws 31.
  • the rubber is as far as possible entirely enclosed at the upper side by an overturned edge extended beyond this cabinet.
  • Fig. '7 shows a construction in which all the component parts are of bent metal. It is suitable for use, for instance, when rustless steel is used for the frames.
  • the insulation is in the form of a rubber cord 34. In other respects the figure speaks for itself.
  • the frame 12 may consist in this event of two parts, each of which is adapted to be thrust sideways over the plate, a groove in it surrounding the rubber strip. Thereafter the two parts may be attached together, and then they form a stiff frame in which the plate 9 is supported.
  • the refrigeratingplates according to the invention may also be constructed,.for instance, as covers of an ordinary refrigerator cabinet, in certain cases as a cover Both the plates and the cabinet can then be operated in a simple manner by the same refrigerating mechanism.
  • a change-over device might be provided to connect the refrigerating machine with the refrigerator cabinet and the refrigerator plate as desired What we claim is:
  • a device for the preservation and display of perishable goods comprising a display surface freely exposed in open air, means for refrigerating said surface, said means being of sufficient capacity to maintain a coating of white froston said surface by moisture withdrawn from air circulating over said surface, a frame surrounding said surface and projecting above the same, and means insulating said frame from said surface whereby the frosted area of the surface is sharply delimited from the unfrosted surface of the frame.
  • a device for displaying and preserving perishable goods comprising a display surface freely exposed in open air, said surface constituting the upper member of a body containing passages constituting a conduit for refrigerating medium, a refrigerating apparatus adapted to supply refrigerating medium to said passages in sufiicient quantity to maintain a coating of white frost on said surface, and a frame surrounding said surface and insulated therefrom whereby the frosted area of the surface is sharply delimited from the unfrosted surface of the frame.
  • a device for displaying and preserving perishable goods comprising a display surface freely exposed in open air, consisting of a plate of heat conductive material, pipe coils positioned beneath said surface and in heat conductive relation thereto, a refrigerating apparatus adapted to supply refrigerating medium to said coils in sufiicient quantity to maintain a coating of white frost on said surface, a frame surrounding said I surface and projecting above and below the same,
  • a device for displaying and preserving perishable goods comprising a display surface freely exposed in open air, means for refrigerating said surface, said means being of sufficient capacity to maintain a coating of white frost on said surface, and a. frame surrounding said surface and sufiiciently insulated therefrom that it will not be chilled low enough to cause the deposition of white frost thereon whereby the frosted area of the surface is sharply delimited from the unfrosted surface of the frame.
  • a device for displaying and preserving perishable goods comprising a freely exposed display surface, means for refrigerating said sur-- face, said means beingof sufficient capacity to maintain a coating of white frost on said sur-- frigerating medium to said passages in sufllcient amount to 'maintain a coating of white frost on said surface, and a frame enclosing said body and insulating material, said frame being suificiently insulated from said body that it will not be chilled low enough to cause the deposition of hoar frost thereon whereby the frosted area of the surface is sharply delimited.
  • a device for the preservation and display of perishable goods comprising a frame, a plate forming the upper surface of the body, refrigerating conduits within the body and in heat-transfer relationship to said plate, a layer of heat insulating material within said frame beneath said plate and adjacent said conduits, and means insulating said frame from said plate to prevent cooling of said frame low enough for the deposition of hoar frost thereon, of refrigerating apparatus for supplying a refrigerating mediumto said conduits in quantity sufficient to maintain a coating of white frost upon said plate by moisture withdrawn from air circulating over the same.
  • a device for displaying and preserving perishable goods comprising a freely exposed display surface, means for refrigerating said surface, said means being of sufiicient capacity to ported in threaded members of insulating ma- 1 terial attached to said frame below said plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Defrosting Systems (AREA)
  • Resistance Heating (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
US682692A 1933-01-28 1933-07-28 Refrigerating apparatus for the storage and preservation of food, delicacies, and the like Expired - Lifetime US1993328A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK615172X 1933-01-28
SE140038X 1933-05-06
GB25778/33A GB418934A (en) 1933-01-28 1933-09-18 Refrigerating apparatus for the storage and preservation of food, delicacies and the like

Publications (1)

Publication Number Publication Date
US1993328A true US1993328A (en) 1935-03-05

Family

ID=34068697

Family Applications (2)

Application Number Title Priority Date Filing Date
US682692A Expired - Lifetime US1993328A (en) 1933-01-28 1933-07-28 Refrigerating apparatus for the storage and preservation of food, delicacies, and the like
US692211A Expired - Lifetime US1993325A (en) 1933-01-28 1933-10-04 Refrigerating device for displaying and preserving perishable goods such as foods, delicacies and the like

Family Applications After (1)

Application Number Title Priority Date Filing Date
US692211A Expired - Lifetime US1993325A (en) 1933-01-28 1933-10-04 Refrigerating device for displaying and preserving perishable goods such as foods, delicacies and the like

Country Status (5)

Country Link
US (2) US1993328A (de)
AT (2) AT140038B (de)
CH (1) CH173158A (de)
DE (2) DE615172C (de)
GB (2) GB417219A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308635A (en) * 1965-05-03 1967-03-14 Howard J Tenniswood Refrigerating apparatus
US10188223B2 (en) 2016-09-26 2019-01-29 Hussmann Corporation Refrigerated merchandiser including eutectic plate refrigeration

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640329A (en) * 1949-09-24 1953-06-02 Ingvardsen Johan Freder Ingvar Cold plate with means to prevent condensation
DE959647C (de) * 1952-09-23 1957-03-07 Adolphe Kundert Kuehlvorrichtung
DE1194303B (de) * 1961-07-12 1965-06-03 Hauni Werke Koerber & Co Kg Foerdervorrichtung fuer Schragen
BE1019485A3 (nl) * 2010-09-16 2012-07-03 Cruysberghs Rudiger Cryogene koelplaat voor voedingsmiddelen en dranken.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308635A (en) * 1965-05-03 1967-03-14 Howard J Tenniswood Refrigerating apparatus
US10188223B2 (en) 2016-09-26 2019-01-29 Hussmann Corporation Refrigerated merchandiser including eutectic plate refrigeration

Also Published As

Publication number Publication date
DE615172C (de) 1935-06-28
GB418934A (en) 1934-11-02
AT140038B (de) 1934-12-27
AT142061B (de) 1935-06-11
GB417219A (en) 1934-10-01
US1993325A (en) 1935-03-05
DE619333C (de) 1935-09-28
CH173158A (de) 1934-11-15

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