FR2543670A1 - IMPROVEMENTS IN PRE-PACKED THERMAL COMPLEXES - Google Patents

Abstract

THE SUBJECT OF THE PRESENT INVENTION IS THERMAL COMPLEXES. THEY ARE CHARACTERIZED BY THE FACT THAT THEY ARE CONSTITUTED BY AT LEAST AN ELEMENTARY VOLUME AND PACKAGED IN AT LEAST ONE SHEET RESISTANT TO THE TEMPERATURE OF USE OF THE SAID COMPLEXES AND REFLECTING FROM THE SIDE OF THE COMPLEX THE INFRARED RAYS. IT RELATES TO IMPROVEMENTS TO PREPACKAGED THERMAL COMPLEXES.

Description

IMPROVEMENTS IN PRE-PACKED THERMAL COMPLEXES

  The present invention relates to improvements to thermal complexes and more particularly to thermal complexes that can be used with their packaging. In the following, the term "thermal complexes" is used to describe products and in particular mixtures which have a solidification plateau or a low temperature variation during the entire period of solidification, which makes it possible in particular to use them as heat transmitters at their solidification temperature ( oq fusion) or the narrow range

  of temperature corresponding to this solidification In the following, we

  For the sake of simplicity, the term "solidification stage", which corresponds to the constancy of temperature during the melting or solidification of a pure body, will be extended and the term will be extended to also designate the slightly sloping bearing which certain mixtures which we choose classically for the quasi constant of their temperature (less than 50 C

  for example) during their melting or solidification.

  These thermal complexes can be used either to store a heat that they then transmit (wraps for example), or to maintain a temperature during the heat transfer

  from an outside source (for example, a bain-marie).

  In the prior art have been described complexes of this type, but for non-limiting illustration, reference will be made in the following to paraffinic complexes because are among the thermal complexes, those whose uses are the oldest and the most varied It is known in particular that the melting temperature of paraffins is directly related to their molecular mass, which offers a range of levels of

  solidifications, made even more varied thanks to the

  Moreover, it is known to incorporate in these complexes

  and, in particular, metals, their oxides or their salts,

  which allows the person skilled in the art to play on the thermal reserve

  and the heat transfer coefficient.

  uses such as bathing are simple, the uses of such com-

  plexes for example for wraps or other liners that require

  manipulations, precautions and time.

  It was also proposed by the applicant and inventor of

  French patent application No. 0 of the pre-packaged complexes which are directly used as such in

  In addition, these packages are designed to ensure

  control of the temperature during use, to limit heat losses

  unnecessary and allow their re-use.

  The present application aims to improve these thermal complexes.

  Pre-packaged by reducing external heat losses and allowing a better match to the conditions of use Indeed,

  it is clear that in all uses the losses to the former

  are expensive in energy and inconvenient when they lead to

premature solidification.

  Moreover, the cooling of the complex is done by the ex-

  In the interior or in contact with the object to be heated, the temperature gradient is such that the solidification occurs on the surface while the core of the complex is still hot and melted. This limits the transmissions and, moreover, in certain applications, especially on to be alive, the contact

  with a rapidly hardened mass is unpleasant.

  Finally, if the use of conductive components in comple-

  xes has many advantages during use, it causes slowness of manufacturing due mainly to a long mixing of pasty products and packaging, o o also costs can

to be raised.

  By the present invention, these disadvantages are overcome.

  thanks to the use in the envelope part of reflective elements

  infrared This allows to limit the losses, to smooth the

  temperature gradient, and thus, to slow down the surface solidification

  and to waive, in whole or in part, the presence of conductive

  (such as metals and metal oxides) in the complexes.

  To better understand the technical characteristics and

  Advantages of the present invention will be to describe embodiments of

  being understood that these are not limiting as to their

  mode of implementation and the applications that can be made.

  We will refer to the two figures that represent schematically

  in section two types of devices according to the present invention.

  In FIG. 1 prisms of thermal complexes 1 are inserted

  between two leaves 2 and 3 The leaves being welded to the peri-

  throughout the periphery of all the prisms arranged

  between them, and between the prisms in 4 The sheets enveloping the prisms can be in any thermoplastic material resistant to the temperatures of use It has obtained excellent results with sheets of polyvinyl chloride The welds between the two sheets

  can be made thermally or by high frequency, for example

  A metal foil 6 is fixed, for example, by gluing on the

sheet 2.

  This sheet 6 is preferably reflective on the side of the sheet 2 When the assembly is applied on the side of the sheet 3 on a body to be heated, the sheet 6 thus serves as an envelope and at the same time reflects the infrared emitted by the complex We will return, hereinafter,

on this point.

  It may also be interesting to perform these operations under vacuum, which naturally avoids the presence of air bubbles at the time of welding, bubbles that may inflate and deform the leaves during

employment.

  It is desirable that on the periphery of the assembly, holes are provided, which allows using a drawstring, to attach sets such as those shown in Figure 1 i side by side or end to end It is of course possible to use all the attachment means: pressures,

  staples, sliding closures and others.

  The user takes a plate such as that shown in Figure 1, it can soak directly in hot water to reach

  the desired temperature and, when it comes out, can apply it directly

  at the place of use, for example on a part of the body in the case of therapeutic use The prisms have softened to heat, they will have a tendency-to crash on the side in contact with the subject, this

  which will increase the surface of contact We use here prisms with

  trapezoidal configuration, which allows easy installation on a convex surface

  on the side of sheet 3 Circular sections can also be used

  elliptical, rectangular or otherwise, re-use

  is extremely easy since it is sufficient, at the end of use, to remove the whole

  ble and when using next, warm it up as it comes

to be said above.

  The intermediate welding between two prisms 4 may not be continuous from end to end until the peripheral welding, which allows

  certain communications between the chambers containing each of the cylinders

  dres, this can notably facilitate the elimination of bubbles

  if the sheets have been welded under vacuum.

  It can be interesting as shown in fig 2, to add another reflective sheet 9 on the side of the use.

  this subject, that one and / or the other of the reflective sheets 6, 9-,

  may be external or internal to sheets 2, 3.

  One can also, from the outside side with respect to the use

  (side 2, 6), add at least one additional insulating sheet.

  The reflection effect can be obtained by any means and for example

  ple, by metallizations of sheets such as 2 or 3 or insulating sheets The advantage of infrared reflection is multiple: it avoids losses to the outside;

  it flattens the temperature gradient and thus delays the solidification

  surface cation (which, if there is double reflection as in FIG. 2, delays the hardening on the body side to be heated);

  it considerably reduces the external radiation and therefore

  be the transmission of heat on the single coffduction, which

  partially and even completely eliminate the use of

  such as metal charges or metal oxides

within the complexes.

  It may also be interesting to plan in any area

  than the whole and the outer side when using, a disposij

  thermometer, for example a liquid crystal, which makes it possible to

  to control the temperature of the thermal complex: it can be useful too

  during heating, to avoid unnecessarily exceeding the fuse

  Do not reach dangerous temperatures for the intended use or even risk damaging the material. Such temperature control is also desirable when using on the subject.

  to avoid leaving too much in place complexes that have too much

  froidi. The person skilled in the art can also imagine devices where the cylindrical or prismatic elements of the thermal complexes are not arranged in parallel with each other in a curve, in a broken or polygonal line or even in shelves insulated from each other by a weld giving a together with the traditional appearance of chocolate bars or similar products They could also be used for wrappings in areas where the plates are difficult to use even taking large curvatures can then be used to bound rods or

no between them.

  To do this, it is possible to extrude the heat complexes in a gut as is well known in the food industry. The rod thus obtained can be continuous or separated by chokes or even cut into closed sections at both ends by a ligature, or

welding or the like.

  This allows the use on very rough surfaces or relatively difficult access for plates such as those shown in Figures 1 and 2 mentioned above sets closed by two thermoplastic sheets with a possible insulation It is obvious that these The sheets can be complex and have several layers. For example, several plastic or metal layers can be glued to one another to form the sheet or several layers. The flexibility and the ease of welding of the thermoplastics are thus combined with the

  mechanical strength and thermal properties of the metal.

  It will be noted that the metal foil 6 bonded on the planar side to the sheet 2, allows the application of the opposite face 3 on a non-planar surface In the case for example of the application on a cylinder the small side 7 of the trapeziums 8 allows a curvature of the assembly to fit the shape to be covered, the external face having the metal sheet 6

  which follows in section substantially parallel to that of the surface

  In this way, it is conceivable that according to the uses, one can

  to use one section or another to

  optimal thermal mission and the other a minimal transmission.

  You can also arm the leaves with yarns or fabrics

  coated in a plastic mass or glued between two thermo-

plastics.

  Those skilled in the art can imagine variants in view of the

  Without being outside the scope of the present invention, it will be possible to divide the thermal complexes into elementary volumes and to package them in one or more sheets which are resistant to the temperature of use, preferably having them so as to present on the side of the thermal transmission the widest surface and, on the other hand, to the extent of

possible, the best insulation.

Claims (10)

  1. Thermal complexes characterized by the fact that they are con-   at least one elemental volume and packaged in at least one sheet resistant to the temperature of use of said complexes and reflecting the infrared radiation side of the complex. 2. Thermal complexes according to claim 1, characterized in that at least one of the sheets is thermoplastic and attached to another.   3. Thermal complexes according to one of claims 1 to 2,   characterized in that at least one of the sheets is composite.   4. Thermal complexes according to one of claims 1 to 3,   characterized by the fact that the elementary volumes are rolls.   5. Thermal complexes according to one of claims 1 to 4,   characterized by the fact that the elementary volumes are tablets,   Thermal complexes according to one of Claims 1 to 5,   characterized by the fact that at least one of the leaves is armed.   7. Thermal complexes according to one of claims 1 to 6,   characterized by the fact that at least one of the two sheets is associated   to a reflective metal sheet.   Thermal complexes according to one of claims 1 to 7,   characterized by the fact that at least one of the sheets is metallized and reflective.   9. Complexes according to one of claims 1 to 8, characterized   in that they are packed under vacuum.   Complexes according to one of Claims 1 to 9, characterized   by the fact that they present a thermometric control device.