EP3001126A1 - Isothermal container, particularly for keeping cold beverages - Google Patents

Isothermal container, particularly for keeping cold beverages Download PDF

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Publication number
EP3001126A1
EP3001126A1 EP15460066.2A EP15460066A EP3001126A1 EP 3001126 A1 EP3001126 A1 EP 3001126A1 EP 15460066 A EP15460066 A EP 15460066A EP 3001126 A1 EP3001126 A1 EP 3001126A1
Authority
EP
European Patent Office
Prior art keywords
phase
change material
container
layer
wall
Prior art date
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.)
Withdrawn
Application number
EP15460066.2A
Other languages
German (de)
French (fr)
Inventor
Ewa Klugmann-Radziemska
Patrycja WciskO
Hubert Denda
Michal Ryms
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Politechnika Gdanska
Original Assignee
Politechnika Gdanska
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Politechnika Gdanska filed Critical Politechnika Gdanska
Publication of EP3001126A1 publication Critical patent/EP3001126A1/en
Withdrawn legal-status Critical Current

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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
    • F25D9/00—Devices not associated with refrigerating machinery and not covered by groups F25D1/00 - F25D7/00; Combinations of devices covered by two or more of the groups F25D1/00 - F25D7/00
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G19/00—Table service
    • A47G19/22—Drinking vessels or saucers used for table service
    • A47G19/2288—Drinking vessels or saucers used for table service with means for keeping liquid cool or hot
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3802—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container in the form of a barrel or vat
    • B65D81/3809—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container in the form of a barrel or vat provided with liquid material between double walls
    • 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
    • F25D2303/00—Details of devices using other cold materials; Details of devices using cold-storage bodies
    • F25D2303/08—Devices using cold storage material, i.e. ice or other freezable liquid
    • F25D2303/083—Devices using cold storage material, i.e. ice or other freezable liquid using cold storage material disposed in closed wall forming part of a container for products to be cooled
    • F25D2303/0831—Devices using cold storage material, i.e. ice or other freezable liquid using cold storage material disposed in closed wall forming part of a container for products to be cooled the liquid is disposed in the space between the walls of the container
    • 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
    • F25D2303/00—Details of devices using other cold materials; Details of devices using cold-storage bodies
    • F25D2303/08—Devices using cold storage material, i.e. ice or other freezable liquid
    • F25D2303/084—Position of the cold storage material in relationship to a product to be cooled
    • F25D2303/0841—Position of the cold storage material in relationship to a product to be cooled external to the container for a beverage, e.g. a bottle, can, drinking glass or pitcher

Definitions

  • the invention concerns an isothermal container, particularly for keeping cold beverages.
  • the invention may be used for transporting, keeping, or serving cold beverages or meals, particularly at private homes, in catering outlets, or when in travel.
  • isothermal containers such as vacuum flasks, designated for keeping both hot and cold beverages.
  • isothermal containers designated for transporting food, consisting of a double wall body made of high pressure polyethylene, where polyurethane foam is placed in between the walls.
  • Polish patent application No. P.395910 is an isothermal container for distribution of food, especially fresh fish, made of plastic, which has a spacer on the bottom shaped so as to correspond with the internal contour of the container. Between the edges of the spacer and the walls of the isothermal container there is a technological slit.
  • the spacer is made of Styrofoam and fitted with tapered-cone-shaped feet.
  • phase-change material of the appropriate phase transition temperature. Initially, the phase-change material is solid and melts when heated. Solidifying again, it gradually releases the earlier accumulated heat, thus keeping the container temperature constant. Those products are placed in insulated vessels, cases, cardboard boxes, or bags used to keep and transport beverages and/or food.
  • Polish patent application No. P.397975 is an isothermal container for keeping hot meals, consisting of a double wall body and an insulating layer in between those walls, where the inner wall of the body and the inner side of the lid are covered with a phase-change material.
  • CM202919767 is an isothermal mug which retains heat of the beverages kept inside, consisting of the lid, body, and handle, where the inner layer of the body is made of stainless steel, and the protective outer layer is a plastic shell. The space formed between those two layers is filled with a phase-change material of the solid-solid type.
  • Majority of the known isothermal containers enable retaining higher temperature of the products kept inside. There is a need to develop a container which would enable long retention of lower temperatures of the products kept inside, especially liquids and in particular cold beverages, which in high temperatures warm up very quickly.
  • the invention concerns an isothermal container, particularly for keeping cold beverages, which consists of a body with two walls, the outer wall and inner wall, where between the walls there is a layer of a phase-change material characterised in that the phase-change material forming the phase-change material layer is a material of the solid-liquid type, preferably paraffin solidifying in temperatures under 8°C, preferably at 5°C.
  • the thickness of the layer of the phase-change material equals no less than 20% of the container's inner diameter.
  • the inner wall is covered with an insulating layer, preferably of polystyrene.
  • phase-change material is liquid and then solidifies when cooled down.
  • the container fitted with the phase-change material as described above can be transported over long distances retaining its content at constant low temperature for many hours.
  • Fig. 1 shows the isothermal contained in cross section
  • Fig. 2 provides a diagram of the structure of the isothermal container as compared with an ordinary container, in an axonometric view
  • Fig. 3 shows a graph depicting mutual relationship between the temperature of the beverage kept inside the container and time for the containers depicted on Fig. 2 .
  • the outer wall 2 is covered with an insulating layer 5 made of polystyrene and fitted with a lid.
  • the thickness D 4 of the layer of paraffin 4 is determined by the inner diameter D of the container.
  • both containers had been cooled in a freezer for about 4 hours down to -4°C.
  • paraffin as a phase-change material allows to extend the time over which the desired low temperature of the beverage kept inside is retained by more than three times.

Abstract

Isothermal container for keeping beverages, cold beverages in particular, consisting of a body with two walls - the outer wall (2) and inner wall (2), where between the walls there is a layer of phase-change material (4), is characterised in that the phase-change material used for the phase-change material (4) layer is of the solid-liquid type, preferably paraffin solidifying under 8°C, preferably at 5°C. The thickness of the layer of the phase-change material (4) equals no less than 20% of the container's inner diameter. The outer wall (2) is covered with an insulating layer (5) made of polystyrene.

Description

  • The invention concerns an isothermal container, particularly for keeping cold beverages. The invention may be used for transporting, keeping, or serving cold beverages or meals, particularly at private homes, in catering outlets, or when in travel.
  • Known and used are isothermal containers such as vacuum flasks, designated for keeping both hot and cold beverages.
  • Known are isothermal containers designated for transporting food, consisting of a double wall body made of high pressure polyethylene, where polyurethane foam is placed in between the walls.
  • Known from Polish patent application No. P.395910 is an isothermal container for distribution of food, especially fresh fish, made of plastic, which has a spacer on the bottom shaped so as to correspond with the internal contour of the container. Between the edges of the spacer and the walls of the isothermal container there is a technological slit. The spacer is made of Styrofoam and fitted with tapered-cone-shaped feet.
  • Also known are market products used as heat buffers. The products take the form of closed profiles filled with phase-change material of the appropriate phase transition temperature. Initially, the phase-change material is solid and melts when heated. Solidifying again, it gradually releases the earlier accumulated heat, thus keeping the container temperature constant. Those products are placed in insulated vessels, cases, cardboard boxes, or bags used to keep and transport beverages and/or food.
  • Known from Polish patent application No. P.397975 is an isothermal container for keeping hot meals, consisting of a double wall body and an insulating layer in between those walls, where the inner wall of the body and the inner side of the lid are covered with a phase-change material.
  • Known from utility model description No. CN202919767 is an isothermal mug which retains heat of the beverages kept inside, consisting of the lid, body, and handle, where the inner layer of the body is made of stainless steel, and the protective outer layer is a plastic shell. The space formed between those two layers is filled with a phase-change material of the solid-solid type.
  • Majority of the known isothermal containers enable retaining higher temperature of the products kept inside. There is a need to develop a container which would enable long retention of lower temperatures of the products kept inside, especially liquids and in particular cold beverages, which in high temperatures warm up very quickly.
  • The invention concerns an isothermal container, particularly for keeping cold beverages, which consists of a body with two walls, the outer wall and inner wall, where between the walls there is a layer of a phase-change material characterised in that the phase-change material forming the phase-change material layer is a material of the solid-liquid type, preferably paraffin solidifying in temperatures under 8°C, preferably at 5°C.
  • Preferably, the thickness of the layer of the phase-change material equals no less than 20% of the container's inner diameter.
  • Preferably, the inner wall is covered with an insulating layer, preferably of polystyrene.
  • Initially, the phase-change material is liquid and then solidifies when cooled down. With the cooled beverage inside, the container fitted with the phase-change material as described above can be transported over long distances retaining its content at constant low temperature for many hours.
  • The invention is described in further detail on the drawing, where Fig. 1 shows the isothermal contained in cross section, Fig. 2 provides a diagram of the structure of the isothermal container as compared with an ordinary container, in an axonometric view, and Fig. 3 shows a graph depicting mutual relationship between the temperature of the beverage kept inside the container and time for the containers depicted on Fig. 2.
    • Example
  • An isothermal container for keeping cold beverages, V=0.5 dm3 in volume, consists of a body 1 with two walls - the outer wall 2 and inner wall 3, in between which there is a layer of phase-change material 4, i.e. a layer of paraffin solidifying at 7°C.
  • The outer wall 2 is covered with an insulating layer 5 made of polystyrene and fitted with a lid. The thickness D4 of the layer of paraffin 4 is determined by the inner diameter D of the container. The thickness of the layer of paraffin 4 in the analysed container represents ∼30% of the inner diameter of the isothermal container, i.e. D4/D = 1.88 cm / 6.36 cm.
  • As shown on Fig. 2 and Fig. 3, the temperature was measured in two tests:
    1. 1) reference test - container devoid the phase-change material,
    2. 2) test with the phase-change material in the form of paraffin - isothermal container with a layer of paraffin solidifying at 7°C.
  • Before the temperature was measured, both containers had been cooled in a freezer for about 4 hours down to -4°C.
  • Ethyl alcohol in the container without the phase-change material warmed up to 8°C over 1 hour and 48 minutes at the average ambient temperature of 23,5°C. Ethyl alcohol in the container with the phase-change material warmed up to the same temperature over 6 hours and 54 minutes at the average ambient temperature of 23,5°C.
  • Using paraffin as a phase-change material allows to extend the time over which the desired low temperature of the beverage kept inside is retained by more than three times.

Claims (3)

  1. Isothermal container for keeping beverages, cold beverages in particular, consisting of a body with two walls - the outer wall and inner wall, where between the walls there is a layer of phase-change material, characterised in that the phase-change material forming the phase-change material layer (4) is a material of the solid-liquid type, preferably paraffin solidifying in temperatures under 8°C, preferably at 5°C.
  2. Container according to Claim 1, characterised in that the thickness (D4) of the layer of the phase-change material (4) equals no less than 20% of the container's inner diameter (D).
  3. Container according to Claims 1-2, characterised in that the outer wall (2) is covered with an insulating layer (5), preferably made of polystyrene.
EP15460066.2A 2014-09-25 2015-09-10 Isothermal container, particularly for keeping cold beverages Withdrawn EP3001126A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL409591A PL228376B1 (en) 2014-09-25 2014-09-25 Isothermal container, preferably for storage of cold drinks

Publications (1)

Publication Number Publication Date
EP3001126A1 true EP3001126A1 (en) 2016-03-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15460066.2A Withdrawn EP3001126A1 (en) 2014-09-25 2015-09-10 Isothermal container, particularly for keeping cold beverages

Country Status (2)

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EP (1) EP3001126A1 (en)
PL (1) PL228376B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10244880B2 (en) 2016-06-21 2019-04-02 John Robert Mumford Beverage containers, heat transfer pad, and related system and methods

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357809A (en) * 1980-10-31 1982-11-09 That Distributing Company, Inc. Cooling arrangement including a gel
US20040231355A1 (en) * 2003-05-19 2004-11-25 Mayer William N. Thermal insert for container having a passive controlled temperature interior
US20060156756A1 (en) * 2005-01-20 2006-07-20 Becke Paul E Phase change and insulating properties container and method of use
GB2447234A (en) * 2007-03-06 2008-09-10 Richard John Birkett Food and drink container comprising a phase change material
ES2372458A1 (en) * 2010-07-07 2012-01-20 Sociedad Anónima Damm Beverage cooling device
PL395910A1 (en) 2011-08-09 2013-02-18 Arpack Polska Spólka Z Ograniczona Odpowiedzialnoscia Isothermal storage bin for food distribution, especially for fresh fish
CN202919767U (en) 2012-11-22 2013-05-08 陕西理工学院 Heat-preserving cup with phase-change material isolating layer
PL397975A1 (en) 2012-02-02 2013-08-05 Politechnika Gdanska Isothermal container, especially for the storage of hot meals

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357809A (en) * 1980-10-31 1982-11-09 That Distributing Company, Inc. Cooling arrangement including a gel
US20040231355A1 (en) * 2003-05-19 2004-11-25 Mayer William N. Thermal insert for container having a passive controlled temperature interior
US20060156756A1 (en) * 2005-01-20 2006-07-20 Becke Paul E Phase change and insulating properties container and method of use
GB2447234A (en) * 2007-03-06 2008-09-10 Richard John Birkett Food and drink container comprising a phase change material
ES2372458A1 (en) * 2010-07-07 2012-01-20 Sociedad Anónima Damm Beverage cooling device
PL395910A1 (en) 2011-08-09 2013-02-18 Arpack Polska Spólka Z Ograniczona Odpowiedzialnoscia Isothermal storage bin for food distribution, especially for fresh fish
PL397975A1 (en) 2012-02-02 2013-08-05 Politechnika Gdanska Isothermal container, especially for the storage of hot meals
CN202919767U (en) 2012-11-22 2013-05-08 陕西理工学院 Heat-preserving cup with phase-change material isolating layer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10244880B2 (en) 2016-06-21 2019-04-02 John Robert Mumford Beverage containers, heat transfer pad, and related system and methods

Also Published As

Publication number Publication date
PL409591A1 (en) 2016-03-29
PL228376B1 (en) 2018-03-30

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Inventor name: WCISLO, PATRYCJA

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Inventor name: RYMS, MICHAL

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