WO2010053467A1 - Dispositif chauffant - Google Patents

Dispositif chauffant Download PDF

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Publication number
WO2010053467A1
WO2010053467A1 PCT/US2008/012501 US2008012501W WO2010053467A1 WO 2010053467 A1 WO2010053467 A1 WO 2010053467A1 US 2008012501 W US2008012501 W US 2008012501W WO 2010053467 A1 WO2010053467 A1 WO 2010053467A1
Authority
WO
WIPO (PCT)
Prior art keywords
compartment
heat generating
divider
access
calcium oxide
Prior art date
Application number
PCT/US2008/012501
Other languages
English (en)
Inventor
Jere Ferguson
Raquel Carvallo
Original Assignee
Donovan Industries, Inc.
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 Donovan Industries, Inc. filed Critical Donovan Industries, Inc.
Priority to PCT/US2008/012501 priority Critical patent/WO2010053467A1/fr
Publication of WO2010053467A1 publication Critical patent/WO2010053467A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24V—COLLECTION, PRODUCTION OR USE OF HEAT NOT OTHERWISE PROVIDED FOR
    • F24V30/00—Apparatus or devices using heat produced by exothermal chemical reactions other than combustion

Definitions

  • This invention relates to a device for heating the contents of a container and for keeping it warm. More particularly, the invention relates to a self-contained heater device that allows the contents such as food in a container to be heated.
  • U.S. Patent No. 6,705,309 discloses a self-heating or self-cooling container in which tubular walls defining an internal cavity into which steam or hot air is placed as a source of heat. This, of course, requires a source of that heated material.
  • Another advantage would be to provide a way of heating containers that produces heat over an extended period of time, rather than simply having an exothermic reaction that lasts a few minutes or less.
  • Yet another advantage would be to provide a way to activate heaters for containers that is simple and effective and that does not have the potential for pre-activation.
  • the unique aspect of this invention is that a controlled, dispersed exothermic reaction can be used to heat the contents of a container quickly and effectively while maintaining the heat for an extended period of time.
  • the heat generating reaction is activated by an access element that is not in position to cause the activation material to contact the heat generating material until that is desired by the user.
  • FIGURE 1 is a side elevation view of the preferred embodiment of this invention.
  • FIGURE 2 is a sectional view of an activator element for use with the preferred embodiment of the invention.
  • the present invention is a two component heater that has a surface on which objects can be heated upon activation of the two components to cause a heat generating reaction.
  • objects by way of example and not by way of limitation, that can be heated are towels, wipes, cushions, hats, gloves and other apparel and food packages and the like.
  • the food package may be any package containing comestibles or other material that is to be heated. Typical food boxes are what is known in the military as MRE, which is an acronym for "meals ready to eat.”
  • the heater of this application features an inner pouch with an activation agent therein, an outer pouch with a heat generating agent and a vacuum therein, such that the vacuum assists in transferring the activation agent into intimate contact with the heat generating agent rapidly and thoroughly.
  • the present invention includes a different activation mechanism than has been available at this time.
  • the device, 10 generally in Fig. 1, includes a first compartment 11 and a second compartment 13, separated in this embodiment by a penetratable divider 15 that keeps the contents of the compartments separated from each other. It is preferred that divider 15 have some thickness separating the walls of the compartments, to provide a larger area that will be penetrated as described below.
  • second compartment 13 can be a separate container inside first compartment 11. Also alternatively, the two compartments can be placed adjacent to one another. Also provided is an opening member 17, shown mounted on the second compartment 13, on the end 19 of compartment 13 away from divider 15. End 19 is not in communication with the inside of compartment 13. Compartment 1 1 also has an end 21 remote from divider 15.
  • Opening member 17 may be fixed, or capped, or removably openable by, for example, threaded cap 28.
  • opening member 17 may include a seal such as a washer at its outer end that is also penetrated by arrow 29.
  • the preferred access element of this invention that would pass through opening member 17 as shown by arrow 29, is shown in Fig. 2.
  • the access element includes a body portion 31 with an axially concentric bore hole 33 or chimney that extends to the outer end 35 where pressure is applied to force the body in the direction of arrow 29 in Fig. 1. Outer end 35 may be in full communication with bore 33 or the bore 33 may not fully pass through outer end 35.
  • the other end of body 31 terminates in a pair of pointed tapers 37 that are sufficiently sharp to puncture divider 15 and allow admixing of the chemical reactants.
  • Body 31 also includes one or more transverse holes 39. Transverse holes 39 provide an opening for the activation agent to pass into bore 33 and out tapers 37.
  • Body 31 includes a larger portion with a bevel edge 41 that fixes its position in opening 17.
  • Possible venting may also be desired if bore 33, as shown, extends to outer end 35 prevent pressure buildup by providing a path for gasses and vapors to escape.
  • transverse holes 41 allow steam to enter the compartment 13 to heat that portion of the device, thus further increasing the efficiency of the device.
  • the compartments may be made from Aclar®, which is a polychlorotrifluoroethylene (PCTFE) material manufactured and sold by Honeywell International Inc.
  • Aclar film is crystal clear, biochemically inert, chemical-resistant, nonflammable, and plasticizer- and stabilizer-free.
  • Aclar laminates provide a wide range of gauges and thus barrier levels to allow flexibility in selecting the optimum barrier level for the chemical system chosen.
  • Other similar pouch materials may be used as well. All that is required is that the material have a functional moisture and vapor barrier for the other components of the invention.
  • the preferred activating material of this invention is water. This is plentiful and safe, and reacts with a number of materials to produce an exothermic reaction.
  • the preferred heat generating material is a solid formed from several components that, when free from moisture, are stable for up to three to five years or more, and which react when moisture is present to generate heat.
  • the preferred solid is made from crystalline calcium oxide, a zeolite powder, and a polyalkyl glycol such as polyethylene glycol.
  • the amount of activation material, such as water is preferably from about 75 to 125 weight percent, basd upon the total weight of heat generating material. Approximately equal amounts by weight of water and heat generating material is the preferred ratio.
  • the amount of calcium oxide ranges from about 30 to 70 weight percent, the amount of polyethylene glycol ranges from about 15 to about 35 weight percent, and the amount of zeolite ranges from about 15 to about 35 weight percent, based on the total weight of heat generating material. Preferred is about 25 weight percent each of the polyethylene glycol and zeolite and about 50 weight percent calcium oxide.
  • the heat generation material most preferred, using the above components includes a calcined calcium oxide.
  • This material is available as a small particle size, with a diameter less than about 0.2 mm, and as a particle of somewhere between 0.2 and 0.8 mm. Larger particles are ground and smaller ones sieved, and the calcium oxide is then calcined. It has been found to be effective to calcine for at least 60 to 120 minutes, and preferably about 90 minutes, at temperatures above 500° C, and most preferably at about 550° C for that period of time.
  • the calcined calcium oxide is, of course, desiccated to prevent any contamination by moisture.
  • zeolite types More than 150 zeolite types have been synthesized and 48 naturally occurring zeolites are known. They are basically hydrated alumino-silicate minerals with an "open" structure that can accommodate a wide variety of positive ions, such as Na+, K+, Ca 2 +, Mg 2 + and others. These positive ions are rather loosely held and can readily be exchanged for others in a contact solution.
  • Some of the more common mineral zeolites are: analcime, chabazite, heulandite, natrolite, phillipsite, and stilbite.
  • An example mineral formula is: Na 2 Al 2 Si 3 Oi O -IoH 2 O.
  • Zeolites by their nature, are finely porous structures that are "hungry" for water and that have the ability to hold heat.
  • the activation agent water in the preferred embodiment, enters into the zeolite pores, trapping the water as it is heated by reacting with the calcium oxide, thus storing heat, providing a longer, more evenly distributed supply of useable heat.
  • the polyethylene glycol component of the heat generating material is admixed with the calcium oxide and zeolite and placed in the outer container as described above.
  • the activation agent water
  • the polyethylene glycol coats the calcium oxide and zeolite, further delaying the exothermic reaction between calcium oxide and water, and adding to the utility of this invention.
  • the present invention provides a significant advantage over the prior art in several ways. Because the outer container is sealed, as described above, the exothermic reaction when heat is generated does not release steam or other vapor as do presently available heaters unless bore 33 extends to end 35. In this case, only small amounts of steam or other vapors will be released.
  • the heater device of this invention is much more effective that what has been done in the past.
  • the heater of this invention has been used to heat products to 150 °F within 5 minutes and maintained the heat at or above 140 0 F for 50 minutes. Prior art devices take 12 minutes to reach only 140 °F and only hold that temperature for 20 minutes. Thus the food can be cooked and kept warm for more than enough time to consume it. In addition, the wipes are kept warm in the same manner.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cookers (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

La présente invention concerne un dispositif chauffant formé par des premier et second compartiments séparés par une cloison pouvant être pénétrée. Un élément d’accès est positionné pour perforer la cloison. Le premier compartiment présente une surface chauffante à un objet et renferme un matériau générant de la chaleur. Le second compartiment comporte un agent activant. Un élément d’accès est en contact avec la cloison pour permettre une réaction dégageant de la chaleur. L’élément d’accès comprend un passage concentrique doté d’une ouverture pour permettre l’accès de l’eau au passage et au premier compartiment, et comprend au moins une extrémité pointue pour perforer la cloison.
PCT/US2008/012501 2008-11-06 2008-11-06 Dispositif chauffant WO2010053467A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2008/012501 WO2010053467A1 (fr) 2008-11-06 2008-11-06 Dispositif chauffant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2008/012501 WO2010053467A1 (fr) 2008-11-06 2008-11-06 Dispositif chauffant

Publications (1)

Publication Number Publication Date
WO2010053467A1 true WO2010053467A1 (fr) 2010-05-14

Family

ID=42153109

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/012501 WO2010053467A1 (fr) 2008-11-06 2008-11-06 Dispositif chauffant

Country Status (1)

Country Link
WO (1) WO2010053467A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10036574B2 (en) 2013-06-28 2018-07-31 British American Tobacco (Investments) Limited Devices comprising a heat source material and activation chambers for the same
EP3368832A4 (fr) * 2015-10-29 2019-05-22 Tempra Technology, Inc. Chauffage portatif pour des petites quantités de produit de consommation
US10542777B2 (en) 2014-06-27 2020-01-28 British American Tobacco (Investments) Limited Apparatus for heating or cooling a material contained therein
US11064725B2 (en) 2015-08-31 2021-07-20 British American Tobacco (Investments) Limited Material for use with apparatus for heating smokable material
US11241042B2 (en) 2012-09-25 2022-02-08 Nicoventures Trading Limited Heating smokeable material
US11452313B2 (en) 2015-10-30 2022-09-27 Nicoventures Trading Limited Apparatus for heating smokable material
US11659863B2 (en) 2015-08-31 2023-05-30 Nicoventures Trading Limited Article for use with apparatus for heating smokable material
US11672279B2 (en) 2011-09-06 2023-06-13 Nicoventures Trading Limited Heating smokeable material
US11825870B2 (en) 2015-10-30 2023-11-28 Nicoventures Trading Limited Article for use with apparatus for heating smokable material
US11924930B2 (en) 2015-08-31 2024-03-05 Nicoventures Trading Limited Article for use with apparatus for heating smokable material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2528817A (en) * 1946-04-30 1950-11-07 Brandt Howard Protective system for an overheated journal-bearing and its axle
US5096413A (en) * 1988-09-30 1992-03-17 Nissin Shokuhin Kabushiki Kaisha Ignition mechanism for a heater
US7258117B2 (en) * 2003-10-17 2007-08-21 Innophos, ,Inc. Heat-producing agglomerates and their application in flameless heaters and self-heating packaging

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2528817A (en) * 1946-04-30 1950-11-07 Brandt Howard Protective system for an overheated journal-bearing and its axle
US5096413A (en) * 1988-09-30 1992-03-17 Nissin Shokuhin Kabushiki Kaisha Ignition mechanism for a heater
US7258117B2 (en) * 2003-10-17 2007-08-21 Innophos, ,Inc. Heat-producing agglomerates and their application in flameless heaters and self-heating packaging

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11672279B2 (en) 2011-09-06 2023-06-13 Nicoventures Trading Limited Heating smokeable material
US11241042B2 (en) 2012-09-25 2022-02-08 Nicoventures Trading Limited Heating smokeable material
US10036574B2 (en) 2013-06-28 2018-07-31 British American Tobacco (Investments) Limited Devices comprising a heat source material and activation chambers for the same
US10542777B2 (en) 2014-06-27 2020-01-28 British American Tobacco (Investments) Limited Apparatus for heating or cooling a material contained therein
US11064725B2 (en) 2015-08-31 2021-07-20 British American Tobacco (Investments) Limited Material for use with apparatus for heating smokable material
US11659863B2 (en) 2015-08-31 2023-05-30 Nicoventures Trading Limited Article for use with apparatus for heating smokable material
US11924930B2 (en) 2015-08-31 2024-03-05 Nicoventures Trading Limited Article for use with apparatus for heating smokable material
EP3368832A4 (fr) * 2015-10-29 2019-05-22 Tempra Technology, Inc. Chauffage portatif pour des petites quantités de produit de consommation
US10858171B2 (en) 2015-10-29 2020-12-08 Tempra Technology, Inc. Portable heating for small quantities of consumer product
US11396416B2 (en) 2015-10-29 2022-07-26 Tempra Technology, Inc. Portable heating for small quantities of consumer product
US11452313B2 (en) 2015-10-30 2022-09-27 Nicoventures Trading Limited Apparatus for heating smokable material
US11825870B2 (en) 2015-10-30 2023-11-28 Nicoventures Trading Limited Article for use with apparatus for heating smokable material

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