WO2009091276A1 - Réchauffeur par contact pour aliments sous emballage - Google Patents

Réchauffeur par contact pour aliments sous emballage Download PDF

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Publication number
WO2009091276A1
WO2009091276A1 PCT/RU2008/000016 RU2008000016W WO2009091276A1 WO 2009091276 A1 WO2009091276 A1 WO 2009091276A1 RU 2008000016 W RU2008000016 W RU 2008000016W WO 2009091276 A1 WO2009091276 A1 WO 2009091276A1
Authority
WO
WIPO (PCT)
Prior art keywords
casing
water
container
cavity
silica gel
Prior art date
Application number
PCT/RU2008/000016
Other languages
English (en)
Russian (ru)
Inventor
Vasily Aleksandrovich Bargan
Aleksandr Viktorovich Peisakhov
Petr Aleksandrovich Bargan
Dmitry Evgenevich Kashin
Original Assignee
Obschestvo S Ogranichennoy Otvetstvennost'u 'bargain Production Group'
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 Obschestvo S Ogranichennoy Otvetstvennost'u 'bargain Production Group' filed Critical Obschestvo S Ogranichennoy Otvetstvennost'u 'bargain Production Group'
Publication of WO2009091276A1 publication Critical patent/WO2009091276A1/fr

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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

  • the invention relates to the food industry, and more particularly to a device for heating food products before using them with heat generated during an exothermic chemical reaction.
  • a food heater is known from the prior art, which comprises a flexible container comprising one compartment with a reagent in a liquid state and several identical compartments with a reagent in a solid state, with the cavity of each compartment with a reagent c. solid state is separated from the compartment with the reagent in the liquid state by means of a suitable shutter, destroyed manually by initiating an exothermic chemical reaction (see US patent A - N '5035230, 1991).
  • the main disadvantage of the known contact heater is that it is inconvenient to use, since with the increase in the area of the heated surface, the number of manually destroyed gates increases proportionally.
  • precautionary measures must be taken, since the used destructible closures in the form of filamentary constrictions with a decoupling assembly are characterized by low reliability.
  • a contact heater of packaged food products taken as a prototype and containing a container made of flexible porous non-woven material with two identical and opposite heat transfer walls, as well as with a closed cavity with a reagent sintered in the form of a plate in solid condition, while the container is placed in a pan filled with water when initiating an exothermic chemical
  • the prototype has the following disadvantages: low efficiency of using heat released as a result of an exothermic chemical reaction between magnesium and water in the presence of iron, since thermal contact with a contact heater can be carried out only on one side; inconvenience when used due to the evolution of hydrogen during the course of the above-mentioned exothermic chemical reaction;
  • the present invention is directed to solving the technical problem of increasing the efficiency of using heat generated as a result of an exothermic chemical reaction, by providing thermal contact of packaged food products with two opposite sides of a contact heater located in both horizontal and vertical position, while increasing safety when using it and providing a duration of heat energy release of 8-10 min.
  • the contact heater of packaged food products containing a container made of flexible, porous non-woven material with two identical and opposite opposite heat transfer walls, as well as with a closed cavity for water-initiated exothermic composition further comprises a casing of gas-tight material, the container mentioned above is provided with a cover made of gas-permeable fiberglass and placed in the cavity of the casing, while the curved cavity of the container is filled with an exothermic composition initiated by water in the form of a homogeneous SUBSTITUTE SHEET (RULE 26) a mixture of calcium oxide, with anhydrous silica gel, with anhydrous silica gel in an amount of 1 part per 3.5-6.0 weight. parts of calcium oxide, and the casing is made with two heat transfer surfaces located on opposite sides of the casing, and with the inlet being closed; after pouring water into the cavity of the casing.
  • the advantage of the proposed contact heater of packaged food products over the prototype is that the placement of the container, equipped with a cover made of gas-permeable fiberglass, in the cavity of the additionally introduced casing of gas-impermeable material with two heat-transfer surfaces located on its opposite sides and with an inlet that is closed after pouring water into the cavity of the casing, it provides increased efficiency in the use of heat released as a result of exothermic chemical reaction, since due to the possibility of placing the packaged heated food products from the two opposite sides placed both horizontally and vertically contact heater results in a reduction of heat losses to the environment.
  • FIG. 1 shows a contact heater of packaged food products, a general view, a stepped section; in Fig. 2 is the same, a top view of Fig.l, a stepped section; in FIG. 3 schematically shows the use of contact heaters for heating a single package with a food product; in FIG. 4 and 5 are the same, but for heating several packages of food products.
  • the contact heater 1 of the packaged food products contains a container 2 (Fig. 1 and 2) with two identical and opposite each other heat transfer walls 3 and 4, as well as a closed cavity that is filled with water exothermic composition 5, namely, a homogeneous oxide mixture calcium with anhydrous silica gel, with the content of anhydrous silica gel in an amount of 1 part per 3.5 - 6.0 weight. parts of calcium oxide.
  • the container 2 is made of a flexible, porous non-woven material, preferably polymeric, for example polypropylene, and has the form of a flat bag, a bag, a parallelepiped, the height of the side walls of which is at least an order of magnitude smaller than its other dimensions, etc.
  • the nonwoven material used for the manufacture of the container 2 should, on the one hand, ensure the integrity of the container 2 during transportation and storage of the contact heater 1, and on the other hand, provide good gas permeability.
  • SUBSTITUTE SHEET (RULE 26)
  • the container 2 is provided with a cover b made of a gas-permeable heat-resistant material - fiberglass.
  • the case b is made of a flat or tubular blank of fiberglass by: either wrapping the container 2 in a flat blank of fiberglass with the subsequent fixing of the edge of the blank; or putting on a tubular blank of fiberglass on the container 2, followed by bending both edges of the blank and securing them using any of a number of known means.
  • the bent upper edge of the tubular fiberglass preform is indicated by 7.
  • the contact heater 1 of the packaged food contains a casing 8 of a gas-tight material, for example, aluminum foil (Fig. 1, 2), impregnated fiberglass, and the like.
  • the casing 8 has the same shape as the container 2, while the outer surfaces of the opposite walls 9 and 10 of the casing 8 are respectively the heat transfer surfaces 11 and 12 of the contact heater 1.
  • the container 2 provided with a cover b is placed with a gap (preferably 1 , 0-1.5 mm) in the cavity of the casing 8, which is made with an inlet 13 that is closed after pouring water into the cavity of the casing 8, for example, by compression (flattening) as a result of applying a mechanical load P (Fig.
  • each heat-transfer surface 11 and 12 of the contact heater has an area that corresponds to either the area of the surface area of the package 15 with the food product heated by each contact heater 1 (Fig. 3), or the total area of the surface areas of several packages 15 ', 15' heated by each contact heater 1 'and 15' '' with food products (Fig. 4).
  • the heat-insulating casing and the lid are indicated by 16 and 17, respectively.
  • the container 1 can be made with a cavity divided into at least two compartments (for example, by forming a thermal seam), while the mixture
  • the packaged food contact heater 1 is used as follows. In the initial state, the food product intended for heating is in the package 15, and the exothermic composition 5 initiated by water (a mixture of calcium oxide with anhydrous silica gel) is in the container 2, which is equipped with a cover 6 and placed in the cavity of the casing 8, the outer surfaces of the opposite walls 9 and 10 of which are respectively the heat transfer surfaces 11 and 12 of the contact heater 1.
  • the initiation of an exothermic chemical reaction between calcium oxide and water is carried out by pouring certain experimental but the volume of water into the cavity of the casing 8 through the inlet 13.
  • a measuring tank attached to the contact heater 1 can be used in the same way as described in the prototype (see position 21 in Fig.
  • the inlet 13 closes.
  • the casing 8 is made of foil, preferably aluminum
  • the shutter is formed, for example, by compression (flattening) of the inlet 13 (when mechanical force P is applied to its walls), followed by 180 ° bending in the same direction adjacent to the opening 13 sections of the opposite walls 9 and 10 of the casing 8 along the fold line 14 (Fig. 1 and 2).
  • the casing 8 is made of materials whose residual deformation is not sufficient for good isolation of the cavity of the casing 8 from the environment (for example, impregnated fiberglass), the hole 13 can be closed either with spring clips or with tongues (petals) preformed ,
  • SUBSTITUTE SHEET (RULE 26) preferably integrally with the casing 8 and having a sticky coating.
  • the contact heater 1 is used to heat one or more packaged food products.
  • the heating of a packaged food product or several packaged food products can be carried out using one or two identical contact heaters 1.
  • the package 15 with the food product (Fig. 3) or packaging 15 ', 15' 'and 15' '' with food products (Fig. 4) are respectively placed or placed on one of the heat-transfer surfaces, for example 11, of the contact heater 1.
  • the package 15 with the food product (Fig. 3) or packages 15 ', 15' 'and 15' ''' s food products (Fig. 4) is respectively placed or once eschayutsya between two identical contact heaters 1 (FIGS. 3 and 4, the second pin heater 1 shown in phantom).
  • the proposed contact heater 1 can be used to simultaneously heat several packages with a food product by placing in an alternating sequence and vertically adjacent identical contact heaters 1 and also vertically identical packages 15 with a food product in a common heat-insulating casing 16, preferably with a lid 17 (Fig. 5). It should be noted here that, in contrast to the horizontal arrangement of contact heaters and food packaging used in the prototype, firstly, there is no need to use partitions inside a heat-insulating casing, and secondly, the efficiency of using heat generated by contact heaters 1 located between packages 15 with a food product.
  • Contact heater 1 packaged food products operates as follows. Water entering the cavity of the casing 8 first passes through the pores in the case b, then through the pores in the walls 3 and 4 of the container 2, and then enters
  • SUBSTITUTE SHEET (RULE 26) the closed cavity of the container 2, filled with a homogeneous mixture of calcium oxide with anhydrous silica gel, with the content of anhydrous silica gel in the amount of 1 part per 3.5-6.0 weight. parts of calcium oxide. Due to the homogeneity of the mixture, calcium oxide and anhydrous silica gel simultaneously come into contact with water entering the closed cavity of container 2. As a result, an intensive process of sorption of water with anhydrous silica gel occurs simultaneously with an exothermic chemical reaction between calcium oxide and water, and, therefore, the distribution of excess (with point of view of providing at the initial stage of the exothermic chemical reaction the required amount of heat produced) water in a bound state over the entire volume of the closed cavity of the container 2.
  • the use of a homogeneous mixture of calcium oxide with anhydrous silica gel as the water-initiated exothermic composition reduces the rate of the exothermic chemical reaction at its initial stage due to the accumulation of anhydrous silica gel uniformly distributed throughout the entire closed cavity of the container 2 excess water entering the cavity of container 2. This is first. Secondly, the increase in temperature in the cavity of container 2 (reaction zone) associated with the course of the exothermic chemical reaction leads to the beginning of the reverse process - desorption of water accumulated in silica gel, which ensures the further exothermic chemical reaction between calcium oxide and water simultaneously in the whole closed container cavity 2.
  • (fiberglass) cover b is transferred respectively to the walls 10 and 9 of the casing 8.
  • a cover 6 of fiberglass provides, firstly, good thermal conductivity (due to the sufficiently large pores filled with water in the fiberglass); secondly, heating the walls 9 and 10 of the casing 8 to a temperature (of the order of 105-120 0 C), which does not cause a violation of the integrity of the package 15 with the food product at a temperature in the reaction zone (cavity of the container 2) exceeding 200 0 C.
  • the presence of a cover b made of fiberglass eliminates the possibility of local overheating of the walls 9 and 10 of the casing 8 in case of violation of the integrity of the walls 3 and 4 of the container 2 in the course of an exothermic chemical reaction.
  • heat from the heat transfer surface 11 (12) in contact with the package 15 (or packages 15 ', 15''and15''') is transferred through the material of the package mentioned above to the food product contained therein.
  • the amount of calcium oxide is selected, firstly, on the basis of the amount of heat that is theoretically necessary for heating a given amount of food product to the required temperature, and secondly, taking into account the inevitable heat loss to the environment, the value of which depends on specific conditions, under which is the heating of the food product, namely, the use of funds that reduce heat transfer with the environment.
  • the choice of the upper limit of the content of anhydrous silica gel is due to the fact that with a higher content of anhydrous silica gel, the maximum achievable temperature of the heat transfer surfaces 11 and 12 contact heater 1 becomes less than 100 0 C.
  • the lower limit of the content of anhydrous silica gel in the amount of 1 part to 6.0 wt.
  • anhydrous silica gel (as was established) affects the amount of vaporization during the exothermic chemical reaction between calcium oxide and water. Moreover, with an increase in grain size (for example, when using technical silica gel of the KSKG and KSMG brands), the amount of water vapor significantly decreases.
  • the specific amount of water poured through the hole 13 depends not only on the amount of calcium oxide used in this contact heater 1, but also on the design features of the contact heater 1. Therefore, the specific amount of water required for the normal operation of a particular contact heater 1 determined in advance experimentally.
  • SUBSTITUTE SHEET (RULE 26) amounted to 96 ° C and 100 0 C, respectively, and after mixing the contents of the package (without opening it), the temperature of the same surfaces of the package almost equalized and was respectively 74 ° C and 75 0 C.

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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)

Abstract

Un réchauffeur par contact (1) pour aliments sous emballage comprend un récipient (2) fait d'un matériau non tissé souple et poreux comportant deux parois identiques opposées à conduction de chaleur (3, 4) ainsi qu'une cavité fermée destinée à une composition exothermique (5) initiée par l'eau. En outre, il comporte une gaine (8) fait d'un matériau imperméable aux gaz et à l'eau. Le récipient (2) est doté d'une housse (6) en tissu en fibres de verre imperméable aux gaz et à l'eau et est disposé dans la cavité de la gaine (8). La cavité fermée du récipient (2) est rempliée d'une composition exothermique ayant la forme d'un mélange homogène d'oxyde de calcium avec un gel de silice anhydre, la teneur de gel de silice anhydre étant de 1 part pour 3,5 à 6,0 parts en poids d'oxyde de calcium, la gaine étant dotée de deux surfaces à émission de chaleur (11, 12) disposées des côtés opposés de la gaine, et d'un orifice d'entrée (13) refermé après le remplissage de la cavité de la gaine avec de l'eau.
PCT/RU2008/000016 2008-01-16 2008-01-16 Réchauffeur par contact pour aliments sous emballage WO2009091276A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2008100577 2008-01-16
RU2008100577/12A RU2350244C1 (ru) 2008-01-16 2008-01-16 Контактный нагреватель упакованных пищевых продуктов

Publications (1)

Publication Number Publication Date
WO2009091276A1 true WO2009091276A1 (fr) 2009-07-23

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ID=40542630

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2008/000016 WO2009091276A1 (fr) 2008-01-16 2008-01-16 Réchauffeur par contact pour aliments sous emballage

Country Status (2)

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RU (1) RU2350244C1 (fr)
WO (1) WO2009091276A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5295475A (en) * 1987-09-17 1994-03-22 Japan Warmer Inc. Heating device
US5355869A (en) * 1994-02-15 1994-10-18 The United States Of America As Represented By The Secretary Of The Army Self-heating group meal assembly and method of using same
WO2007122900A1 (fr) * 2006-04-21 2007-11-01 Mycoal Co., Ltd. Appareil de chauffage des aliments

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5295475A (en) * 1987-09-17 1994-03-22 Japan Warmer Inc. Heating device
US5355869A (en) * 1994-02-15 1994-10-18 The United States Of America As Represented By The Secretary Of The Army Self-heating group meal assembly and method of using same
WO2007122900A1 (fr) * 2006-04-21 2007-11-01 Mycoal Co., Ltd. Appareil de chauffage des aliments

Also Published As

Publication number Publication date
RU2350244C1 (ru) 2009-03-27

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