WO2019092370A1 - Heating fabric, application to a blanket or a garment - Google Patents

Heating fabric, application to a blanket or a garment Download PDF

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Publication number
WO2019092370A1
WO2019092370A1 PCT/FR2018/052767 FR2018052767W WO2019092370A1 WO 2019092370 A1 WO2019092370 A1 WO 2019092370A1 FR 2018052767 W FR2018052767 W FR 2018052767W WO 2019092370 A1 WO2019092370 A1 WO 2019092370A1
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WO
WIPO (PCT)
Prior art keywords
heating
fabric
heating element
power supply
temperature
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PCT/FR2018/052767
Other languages
French (fr)
Inventor
Philippe Martinez
Christophe BIETRIX
Original Assignee
Ilo
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.)
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Publication date
Application filed by Ilo filed Critical Ilo
Publication of WO2019092370A1 publication Critical patent/WO2019092370A1/en

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • H05B3/342—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heaters used in textiles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient

Definitions

  • the invention relates to the technical field of heated tissues and more particularly that of blankets or heated clothing intended for patients, made from such fabrics.
  • the cold generates significant discomfort for the patients which also has adverse consequences, in particular on their anxiety or their perception of the pain.
  • the hot air warming blankets marketed under the brand name 3M® Bair Hugger® are designed to prevent hypothermia while providing patients with increased comfort.
  • This cover made of plastic material, comprises a network of conduits and is associated with a device for generating hot pulsed air, so as to inflate under the effect of this air supply.
  • EP 2,255,759 which describes a patient garment comprising a hospital gown whose inner surface receives a pneumatic convection device. This one has an inflatable portion, supplied with air under pressure by appropriate means and a permeable element for emitting air under pressure.
  • the means generating the air under pressure are noisy, which is an inconvenience for the patient and the nursing staff.
  • the cover has microperforations so that the surgeon receives warm air drawn from the face during the operation, which is an additional inconvenience.
  • the object of the invention is to overcome these drawbacks by proposing a heating fabric that is suitable for medical applications and that can be used for making blankets or clothes and whose production cost is very high. low, making it economically feasible for a single use, while presenting increased performance.
  • the invention relates to a heating fabric comprising a thin-film heating element with electrical conducting means and at least one layer made of an electrically insulating material, and means for connecting said heating element to a power supply, in which the electrical conducting means are made at least partly of a conductive material whose resistance varies as a function of temperature and at least one face of said heating element is at least partially covered with a layer of a textile material.
  • the temperature regulation of the heating fabric can be achieved by means located outside the fabric itself, which allows a single use of the fabric, due to a relatively low cost of implementation.
  • the heating element comprises electrical conductive means in a sheet, supported by a layer of an electrically insulating material or disposed between two layers of an electrically insulating material;
  • the fabric is for single use
  • the invention also relates to a kit comprising a heating fabric according to the invention and a power supply regulation box, intended to be connected between the connection means of said fabric and the power supply, said box comprising means for determining the resistance of the conductive means of the heating element, deduce the temperature of the fabric at a time t (T t ), compare it to a set value (T c ) and regulate the supply based on this comparison.
  • a kit comprising a heating fabric according to the invention and a power supply regulation box, intended to be connected between the connection means of said fabric and the power supply, said box comprising means for determining the resistance of the conductive means of the heating element, deduce the temperature of the fabric at a time t (T t ), compare it to a set value (T c ) and regulate the supply based on this comparison.
  • the invention also relates to a blanket or garment made of a heating fabric according to the invention.
  • Figure 1 is a schematic perspective view of an embodiment of a blanket with a heating fabric according to the invention, and a control box.
  • Figure 2 is a schematic perspective and partly exploded view of another embodiment of a cover made with a fabric according to the invention.
  • Figure 1 shows a cover 1 made with a heating fabric according to the invention. This comprises a heating element 10 in a thin layer, placed between two layers 11 and 12 of a textile material.
  • It may be a woven or non-woven textile material made from polyester or polypropylene fibers or any other material used in the medical field and in particular to make survival blankets.
  • this textile material will preferably be nonwoven.
  • the grammage of the material is preferably between 15 and 100 g / m 2 and preferably between 20 and 50 g / m 2 .
  • the invention is not, however, limited to this embodiment and the cover 1 could comprise only one layer of textile material.
  • the heating element 10 is in the form of a thin layer. It may be a heating film having a metal conductive track placed flat between two electrically insulating films or on a single insulating film, and connected at each of its ends to a power supply wire.
  • This conductive track may in particular be made of aluminum and the two polyester films.
  • the thickness of such a film is typically of the order of a few hundred microns.
  • the heating element may also consist of a heating cable in weft, held between two layers of a flexible insulating material.
  • a heating cable of this type has a thickness of between 2 and 6 mm and typically equal to 5 mm.
  • this heating element is preferably flexible. This is particularly the case for heating films or heating cables (IEC 335-2-96 standard).
  • the cover 1 is made from a heating fabric according to the invention which has a rectangular shape and adapted dimensions. This fabric could also be used to make a garment.
  • these means 13 are, in practice, connected to a power supply via a regulation box 20, which comprises first means 21 for connection to the connection means 13 of the cover and second means 22 for connection to the power supply.
  • the electrical means are made of a material whose resistance varies depending on the temperature.
  • This material may for example be aluminum, copper, inconel or Constantan.
  • the entire conductive track is made of such a material.
  • the heating cable it is the core of this cable which is made of this material.
  • the housing can determine itself the temperature of the cover, at any time, and regulate the power supply according to the comparison between the measured temperature and the desired set temperature.
  • an initialization step is carried out, in which the housing measures the intensity across the heating element and deduces the intensity (Io) and the initial resistance (Ro) of the cover.
  • the housing measures the ambient temperature (To), which corresponds to the initial temperature of the cover, which is also at ambient temperature.
  • the heating element is supplied with electricity, and after a determined time interval (t), the housing again makes a measurement of the intensity (I t ) at the terminals of the element. heating, to deduce the value of its resistance (R t ) and therefore its temperature (T t ) at time t.
  • the box then compares the temperature at time t (T t ) to the set temperature (T c ), previously determined by the operator.
  • the regulation box offers the operator the possibility of setting the set temperature to a value chosen within a given range, generally between 30 ° C. and 42 ° C. and, preferably, between 30 ° C. and 37 ° C.
  • control box stops the power supply, so that the temperature of the heating blanket can go down to get closer to the set temperature.
  • the temperature control is carried out at regular time intervals, generally every 1 to 5 seconds, the measuring time for a few milliseconds.
  • the heating blanket can be disposable, the regulating box can instead used successively with different covers.
  • the cost of manufacturing the heating fabric according to the invention and therefore of a heating blanket or a heating cloth is very small because the manufacturing is very simple and it implements materials whose cost is also reduced.
  • textile material in the heating fabric itself avoids the use of complementary fabrics, in the form of sheet or garment.
  • This integration of the textile layer in the heating fabric eliminates the cleaning and sterilization operations of these textiles, when the heating fabric is disposable.
  • the heating fabric according to the invention also avoids any mixing of dust, due to air movements.
  • FIG. 2 illustrates another embodiment of a heating fabric according to the invention.
  • This fabric 3 comprises a heating element 30 in a thin layer, placed between two sets 31 and 32 of layers of textile material.
  • the assembly 31 comprises three layers 310, 311 and 312 while the second assembly 32 comprises four layers 320, 321, 322 and 323.
  • the reference 33 designates means of connection to a power supply.
  • the heating element 30 is in the form of a heating film having a conductive track 300 placed on a film 301 electrically insulating.
  • the heating element could comprise a conductive track placed between two insulating films or be in the form of a heating cable, the number of layers of textile materials could be modified and the textile materials could be provided only on one of the faces of the heating element.
  • the conductive track is made of a material whose resistance varies as a function of temperature.
  • the heating fabric is inherently flexible since it incorporates a heating element in a thin layer, itself flexible, as well as textile materials including the nonwoven type.
  • This feature allows it to be easily used in the form of a blanket or clothing.
  • This fabric can be used at a voltage between 24 V and 230 V, or even less than 24 V.
  • control box can be connected to any socket under a voltage of 230 V and it is designed to be able to transform this voltage into a very low safety voltage, of the order of 24 V. This very low voltage has safety advantages for the patient and the nursing staff.
  • the invention is not limited to the two applications of the heating fabric according to the invention which have just been described.
  • the properties and advantages of this heating fabric offer on the contrary many applications, for example for survival blankets.

Abstract

The present invention relates to a heating fabric comprising a heating element (30) in a thin layer with electricity conducting means and at least one layer made of an electrically insulating material, as well as means for connecting (33) the heating element to an electrical power supply, wherein the electricity conducting means are made of a conductive material with a resistance that varies according to the temperature and at least one face of the heating element is at least partially covered by a layer (310, 311, 312, 320, 321, 322, 323) made of a textile material.

Description

TISSU CHAUFFANT , APPLICATION A UNE COUVERTURE OU UN VÊTEMENT  HEATED FABRIC, APPLICATION TO COVER OR CLOTHING
L' invention concerne le domaine technique des tissus chauffants et plus particulièrement celui des couvertures ou des vêtements chauffants destinés à des patients, réalisés à partir de tels tissus. The invention relates to the technical field of heated tissues and more particularly that of blankets or heated clothing intended for patients, made from such fabrics.
Le problème de l'hypothermie accidentelle lors d'opérations chirurgicales est bien connu.  The problem of accidental hypothermia during surgical operations is well known.
Différents moyens ont déjà été proposés pour l'éviter, compte tenu de ses conséquences néfastes, parmi lesquelles un taux de mortalité supérieur et un taux accru de complications post-opératoires.  Various means have already been proposed to avoid it, given its adverse consequences, including a higher mortality rate and an increased rate of post-operative complications.
De surcroît, dans un contexte plus général, le froid génère un inconfort important pour les patients qui a également des conséquences néfastes, notamment sur leur anxiété ou leur perception de la douleur.  In addition, in a more general context, the cold generates significant discomfort for the patients which also has adverse consequences, in particular on their anxiety or their perception of the pain.
Ainsi, les couvertures de réchauffement par air puisé commercialisées sous la dénomination 3M® Bair Hugger® sont conçues pour assurer la prévention de l'hypothermie, tout en offrant aux patients un confort accru.  For example, the hot air warming blankets marketed under the brand name 3M® Bair Hugger® are designed to prevent hypothermia while providing patients with increased comfort.
Cette couverture, réalisée en matière plastique, comporte un réseau de conduits et elle est associée à un dispositif de génération d'air puisé chaud, de façon à se gonfler sous l'effet de cette alimentation en air.  This cover, made of plastic material, comprises a network of conduits and is associated with a device for generating hot pulsed air, so as to inflate under the effect of this air supply.
On peut également citer le document EP 2 255 759 qui décrit un vêtement pour patient comprenant une blouse d'hôpital dont la surface interne reçoit un dispositif de convection pneumatique. Celui-ci présente une partie gonflable, alimentée en air sous pression par des moyens appropriés et un élément perméable permettant d'émettre de l'air sous pression . There may also be mentioned EP 2,255,759 which describes a patient garment comprising a hospital gown whose inner surface receives a pneumatic convection device. This one has an inflatable portion, supplied with air under pressure by appropriate means and a permeable element for emitting air under pressure.
Ces différents dispositifs apportent satisfaction pour prévenir l'hypothermie, notamment lors d'une opération chirurgicale.  These various devices provide satisfaction to prevent hypothermia, especially during a surgical operation.
Ils présentent cependant certains inconvénients, notamment du fait de leur encombrement lié à la présence de parties gonflables.  However, they have certain disadvantages, particularly because of their size related to the presence of inflatable parts.
Les moyens générant l'air sous pression sont bruyants, ce qui constitue une gêne pour le patient et le personnel soignant.  The means generating the air under pressure are noisy, which is an inconvenience for the patient and the nursing staff.
De plus, la couverture comporte des micro- perforations si bien que le chirurgien reçoit de l'air chaud puisé au visage pendant l'opération, ce qui constitue une gêne supplémentaire.  In addition, the cover has microperforations so that the surgeon receives warm air drawn from the face during the operation, which is an additional inconvenience.
Par ailleurs, leur fabrication est relativement onéreuse .  Moreover, their manufacture is relatively expensive.
Ceci peut rentrer en conflit avec un usage unique des produits, rendu souvent impératif lorsque les produits sont utilisés dans un cadre hospitalier et notamment au bloc opératoire.  This can conflict with a single use of products, often made imperative when the products are used in a hospital setting and especially in the operating room.
Enfin, ils nécessitent l'utilisation de parties tissées, tels que des draps ou des blouses qui doivent être nettoyés et stérilisés.  Finally, they require the use of woven parts, such as sheets or gowns that must be cleaned and sterilized.
L'invention a pour objet de pallier ces inconvénients en proposant un tissu chauffant convenant à des applications médicales et pouvant être utilisé pour réaliser des couvertures ou des vêtements et dont le coût de réalisation est très faible, ce qui rend économiquement possible un usage unique, tout en présentant des performances accrues. The object of the invention is to overcome these drawbacks by proposing a heating fabric that is suitable for medical applications and that can be used for making blankets or clothes and whose production cost is very high. low, making it economically feasible for a single use, while presenting increased performance.
Ainsi, l'invention concerne un tissu chauffant comprenant un élément chauffant en couche mince avec des moyens conducteurs électriques et au moins une couche réalisée en un matériau électriquement isolant, ainsi que des moyens de connexion dudit élément chauffant à une alimentation électrique, dans lequel les moyens conducteurs électriques sont réalisés au moins en partie en un matériau conducteur dont la résistance varie en fonction de la température et au moins une face dudit élément chauffant est recouverte au moins partiellement d'une couche en un matériau textile.  Thus, the invention relates to a heating fabric comprising a thin-film heating element with electrical conducting means and at least one layer made of an electrically insulating material, and means for connecting said heating element to a power supply, in which the electrical conducting means are made at least partly of a conductive material whose resistance varies as a function of temperature and at least one face of said heating element is at least partially covered with a layer of a textile material.
Grâce à cet agencement, la régulation en température du tissu chauffant peut être réalisée grâce à des moyens situés à l'extérieur du tissu lui- même, ce qui permet un usage unique du tissu, du fait d'un coût de réalisation relativement faible.  Thanks to this arrangement, the temperature regulation of the heating fabric can be achieved by means located outside the fabric itself, which allows a single use of the fabric, due to a relatively low cost of implementation.
Dans des modes de réalisation avantageux, on a de plus recours à l'une et/ou à l'autre des dispositions suivantes :  In advantageous embodiments, one and / or the other of the following provisions is also used:
- l'élément chauffant comprend des moyens conducteurs électriques en nappe, supportés par une couche d'un matériau électriquement isolant ou disposés entre deux couches d'un matériau électriquement isolant ;  - The heating element comprises electrical conductive means in a sheet, supported by a layer of an electrically insulating material or disposed between two layers of an electrically insulating material;
- le tissu est stérilisé ;  - the tissue is sterilized;
- le tissu est à usage unique ;  - the fabric is for single use;
- le matériau textile est à base de fibres de polyester ou de polypropylène . L' invention concerne également un kit comprenant un tissu chauffant selon l'invention et un boîtier de régulation de l'alimentation électrique, destiné à être connecté entre les moyens de connexion dudit tissu et l'alimentation électrique, ledit boîtier comprenant des moyens pour déterminer la résistance des moyens conducteurs de l'élément chauffant, en déduire la température du tissu à un instant t (Tt) , la comparer à une valeur de consigne (Tc) et réguler l'alimentation en fonction de cette comparaison. the textile material is based on polyester or polypropylene fibers. The invention also relates to a kit comprising a heating fabric according to the invention and a power supply regulation box, intended to be connected between the connection means of said fabric and the power supply, said box comprising means for determining the resistance of the conductive means of the heating element, deduce the temperature of the fabric at a time t (T t ), compare it to a set value (T c ) and regulate the supply based on this comparison.
L' invention concerne également une couverture ou un vêtement réalisés en un tissu chauffant selon 1 ' invention .  The invention also relates to a blanket or garment made of a heating fabric according to the invention.
L'invention sera mieux comprise et d'autres buts, avantages et caractéristiques de celle-ci apparaîtront plus clairement à la lecture de la description qui suit et qui est faite au regard des dessins annexés sur lesquels :  The invention will be better understood and other objects, advantages and characteristics thereof will appear more clearly on reading the description which follows and which is made with reference to the appended drawings in which:
La figure 1 est une vue schématique en perspective d'un exemple de réalisation d'une couverture avec un tissu chauffant selon l'invention, ainsi que d'un boîtier de régulation.  Figure 1 is a schematic perspective view of an embodiment of a blanket with a heating fabric according to the invention, and a control box.
La figure 2 est une vue schématique en perspective et en partie éclatée d'un autre exemple de réalisation d'une couverture réalisée avec un tissu selon l'invention.  Figure 2 is a schematic perspective and partly exploded view of another embodiment of a cover made with a fabric according to the invention.
Les éléments communs aux différentes figures seront désignés par les mêmes références.  The elements common to the different figures will be designated by the same references.
La figure 1 montre une couverture 1 réalisée avec un tissu chauffant selon l'invention. Celui-ci comprend un élément chauffant 10 en couche mince, placé entre deux couches 11 et 12 en un matériau textile . Figure 1 shows a cover 1 made with a heating fabric according to the invention. This comprises a heating element 10 in a thin layer, placed between two layers 11 and 12 of a textile material.
Il peut s'agir d'un matériau textile tissé ou non tissé, réalisé à partir de fibres de polyester ou de polypropylène ou de tout autre matériau utilisé dans le domaine médical et notamment pour réaliser des couvertures de survie.  It may be a woven or non-woven textile material made from polyester or polypropylene fibers or any other material used in the medical field and in particular to make survival blankets.
Dans le cadre de l'invention, ce matériau textile sera de préférence non tissé.  In the context of the invention, this textile material will preferably be nonwoven.
Le grammage du matériau est de préférence compris entre 15 et 100 g/m2 et de préférence, entre 20 et 50 g/m2. The grammage of the material is preferably between 15 and 100 g / m 2 and preferably between 20 and 50 g / m 2 .
L'invention n'est pas cependant limitée à ce mode de réalisation et la couverture 1 pourrait ne comporter qu'une couche en matériau textile.  The invention is not, however, limited to this embodiment and the cover 1 could comprise only one layer of textile material.
L'élément chauffant 10 se présente sous la forme d'une couche mince. Il peut s'agir d'un film chauffant comportant une piste conductrice métallique placée à plat entre deux films isolants électriquement ou sur un seul film isolant, et reliée à chacune de ses extrémités à un fil d'alimentation électrique .  The heating element 10 is in the form of a thin layer. It may be a heating film having a metal conductive track placed flat between two electrically insulating films or on a single insulating film, and connected at each of its ends to a power supply wire.
Cette piste conductrice peut notamment être réalisée en aluminium et les deux films en polyester.  This conductive track may in particular be made of aluminum and the two polyester films.
L'épaisseur d'un tel film est classiquement de l'ordre de quelques centaines de microns.  The thickness of such a film is typically of the order of a few hundred microns.
L'invention n'est cependant pas limitée à ce mode de réalisation. En particulier, l'élément chauffant peut également consister en un câble chauffant en trame, maintenu entre deux couches en un matériau souple isolant. Un câble chauffant de ce type présente une épaisseur comprise entre 2 et 6 mm et typiquement égal à 5 mm. The invention is however not limited to this embodiment. In particular, the heating element may also consist of a heating cable in weft, held between two layers of a flexible insulating material. A heating cable of this type has a thickness of between 2 and 6 mm and typically equal to 5 mm.
Dans tous les cas, cet élément chauffant est de préférence flexible. C'est notamment le cas des films chauffants ou des câbles chauffants (norme CEI 335-2- 96) .  In all cases, this heating element is preferably flexible. This is particularly the case for heating films or heating cables (IEC 335-2-96 standard).
Cette notion de flexibilité est comprise comme la capacité de s'adapter à des surfaces tridimensionnelles sans détérioration ou mauvais fonctionnement .  This notion of flexibility is understood as the ability to adapt to three-dimensional surfaces without deterioration or malfunction.
La couverture 1 est réalisée à partir d'un tissu chauffant selon l'invention qui présente une forme rectangulaire et des dimensions adaptées. Ce tissu pourrait également être utilisé pour réaliser un vêtement .  The cover 1 is made from a heating fabric according to the invention which has a rectangular shape and adapted dimensions. This fabric could also be used to make a garment.
Les moyens de connexion à une alimentation électrique portent la référence 13.  The means of connection to a power supply bear the reference 13.
Comme l'illustre la figure 1, ces moyens 13 sont, en pratique, reliés à une alimentation électrique par l'intermédiaire d'un boîtier de régulation 20, lequel comporte des premiers moyens 21 de connexion aux moyens de connexion 13 de la couverture et des deuxièmes moyens 22 de connexion à l'alimentation électrique.  As illustrated in FIG. 1, these means 13 are, in practice, connected to a power supply via a regulation box 20, which comprises first means 21 for connection to the connection means 13 of the cover and second means 22 for connection to the power supply.
Quelle que soit la forme présentée par le tissu chauffant, les moyens électriques sont réalisés en un matériau dont la résistance varie en fonction de la température .  Whatever the shape presented by the heating fabric, the electrical means are made of a material whose resistance varies depending on the temperature.
Ce matériau peut par exemple être de l'Aluminium, du Cuivre, de l'inconel ou du Constantan. Dans le cas d'un film chauffant, toute la piste conductrice est réalisée en un tel matériau. Dans le cas d'un câble chauffant, c'est l'âme de ce câble qui est réalisée dans ce matériau. This material may for example be aluminum, copper, inconel or Constantan. In the case of a heating film, the entire conductive track is made of such a material. In the case of a heating cable, it is the core of this cable which is made of this material.
Grâce à cette caractéristique, il est possible de réguler l'alimentation de l'élément chauffant, sans que des moyens techniques, tels que des capteurs, soient nécessaires dans l'élément chauffant lui-même.  With this feature, it is possible to regulate the power supply of the heating element, without the need for technical means, such as sensors, in the heating element itself.
En effet, le boîtier peut déterminer lui-même la température de la couverture, à tout moment, et réguler l'alimentation électrique en fonction de la comparaison entre la température mesurée et la température de consigne souhaitée.  Indeed, the housing can determine itself the temperature of the cover, at any time, and regulate the power supply according to the comparison between the measured temperature and the desired set temperature.
Ce fonctionnement va maintenant être décrit plus en détail, la couverture 1 étant connectée au boîtier 20, lui-même relié à l'alimentation électrique.  This operation will now be described in more detail, the cover 1 being connected to the housing 20, itself connected to the power supply.
Dans un premier temps, on réalise une étape d' initialisation, dans laquelle le boîtier mesure l'intensité aux bornes de l'élément chauffant et en déduit l'intensité (Io) et la résistance (Ro) initiale de la couverture.  In a first step, an initialization step is carried out, in which the housing measures the intensity across the heating element and deduces the intensity (Io) and the initial resistance (Ro) of the cover.
Par ailleurs, le boîtier mesure la température ambiante (To) , qui correspond à la température initiale de la couverture, celle-ci étant également à température ambiante.  Furthermore, the housing measures the ambient temperature (To), which corresponds to the initial temperature of the cover, which is also at ambient temperature.
Une fois cette étape d'initialisation réalisée, l'élément chauffant est alimenté en électricité, et après un intervalle de temps déterminé (t) , le boîtier effectue de nouveau une mesure de l'intensité (It) aux bornes de l'élément chauffant, pour en déduire la valeur de sa résistance (Rt) et donc sa température (Tt) à l'instant t. Once this initialization step is carried out, the heating element is supplied with electricity, and after a determined time interval (t), the housing again makes a measurement of the intensity (I t ) at the terminals of the element. heating, to deduce the value of its resistance (R t ) and therefore its temperature (T t ) at time t.
Le boîtier compare alors la température à l'instant t (Tt) à la température de consigne (Tc) , préalablement déterminé par l'opérateur. The box then compares the temperature at time t (T t ) to the set temperature (T c ), previously determined by the operator.
A cet égard, le boîtier de régulation offre à l'opérateur la possibilité de fixer la température de consigne à une valeur choisie dans une plage déterminée, généralement comprise entre 30° C et 42° C et, de préférence, entre 30° C et 37° C.  In this respect, the regulation box offers the operator the possibility of setting the set temperature to a value chosen within a given range, generally between 30 ° C. and 42 ° C. and, preferably, between 30 ° C. and 37 ° C.
Si cette comparaison révèle que la température à l'instant t Tt est inférieure à la température de consigne Tc, le boîtier continue à alimenter l'élément chauffant. If this comparison reveals that the temperature at time t T t is less than the set temperature T c , the housing continues to supply the heating element.
Dans le cas contraire, le boîtier de régulation arrête l'alimentation électrique, de façon à ce que la température de la couverture chauffante puisse descendre pour se rapprocher de la température de consigne .  In the opposite case, the control box stops the power supply, so that the temperature of the heating blanket can go down to get closer to the set temperature.
Le contrôle de température est réalisé à des intervalles de temps réguliers, généralement toutes les 1 à 5 secondes, le temps de mesure durant quelques millisecondes.  The temperature control is carried out at regular time intervals, generally every 1 to 5 seconds, the measuring time for a few milliseconds.
On comprend dès lors que la couverture chauffante peut être à usage unique, le boîtier de régulation pouvant au contraire utilisé successivement avec des couvertures différentes.  It is therefore understood that the heating blanket can be disposable, the regulating box can instead used successively with different covers.
Le coût de fabrication du tissu chauffant selon l'invention et donc d'une couverture chauffante ou d'un tissu chauffant est très réduit car la fabrication est très simple et qu'elle met en œuvre des matériaux dont le coût est également réduit. The cost of manufacturing the heating fabric according to the invention and therefore of a heating blanket or a heating cloth is very small because the manufacturing is very simple and it implements materials whose cost is also reduced.
Par ailleurs, l'utilisation de matériau textile dans le tissu chauffant lui-même permet d'éviter l'utilisation de tissus complémentaires, sous la forme de drap ou de vêtement. Cette intégration de la couche textile dans le tissu chauffant supprime les opérations de nettoyage et de stérilisation de ces textiles, lorsque le tissu chauffant est à usage unique.  Furthermore, the use of textile material in the heating fabric itself avoids the use of complementary fabrics, in the form of sheet or garment. This integration of the textile layer in the heating fabric eliminates the cleaning and sterilization operations of these textiles, when the heating fabric is disposable.
On peut également souligner qu'avec l'utilisation d'un élément chauffant alimenté électriquement, la chaleur est générée au plus près du patient, sans qu'aucune déperdition n'intervienne. Ceci n'est pas le cas lorsque la chaleur est générée à l'extérieur du dispositif de chauffage, pour être apportée ensuite à proximité du patient.  It can also be emphasized that with the use of an electrically powered heating element, the heat is generated as close as possible to the patient, without any loss occurring. This is not the case when the heat is generated outside the heater, to be brought next close to the patient.
Le tissu chauffant selon l'invention évite également tout brassage de poussière, dû à des mouvements d'air.  The heating fabric according to the invention also avoids any mixing of dust, due to air movements.
Il est maintenant fait référence à la figure 2 qui illustre un autre de mode de réalisation d'un tissu chauffant selon l'invention.  Reference is now made to FIG. 2 which illustrates another embodiment of a heating fabric according to the invention.
Ce tissu 3 comprend un élément chauffant 30 en couche mince, placé entre deux ensembles 31 et 32 de couches de matériau textile.  This fabric 3 comprises a heating element 30 in a thin layer, placed between two sets 31 and 32 of layers of textile material.
L'ensemble 31 comporte trois couches 310, 311 et 312 tandis que le deuxième ensemble 32 comporte quatre couches 320, 321, 322 et 323.  The assembly 31 comprises three layers 310, 311 and 312 while the second assembly 32 comprises four layers 320, 321, 322 and 323.
La référence 33 désigne des moyens de connexion à une alimentation électrique. Dans l'exemple illustré sur la figure 2, l'élément chauffant 30 se présente sous la forme d'un film chauffant comportant une piste conductrice 300 placée sur un film 301 isolant électriquement. The reference 33 designates means of connection to a power supply. In the example illustrated in Figure 2, the heating element 30 is in the form of a heating film having a conductive track 300 placed on a film 301 electrically insulating.
Comme indiqué précédemment, l'invention n'est pas limitée à ce mode de réalisation. En particulier, l'élément chauffant pourrait comporter une piste conductrice placée entre deux films isolants ou se présenter sous la forme d'un câble chauffant, le nombre de couches de matériaux textiles pourrait être modifié et les matériaux textiles pourraient n'être prévus que sur une des faces de l'élément chauffant.  As indicated above, the invention is not limited to this embodiment. In particular, the heating element could comprise a conductive track placed between two insulating films or be in the form of a heating cable, the number of layers of textile materials could be modified and the textile materials could be provided only on one of the faces of the heating element.
Comme précédemment, la piste conductrice est réalisée en un matériau dont la résistance varie en fonction de la température.  As before, the conductive track is made of a material whose resistance varies as a function of temperature.
La description qui précède montre que le tissu chauffant est par nature flexible puisqu' il intègre un élément chauffant en couche mince, lui-même flexible, ainsi que des matériaux textiles notamment du type non tissé.  The foregoing description shows that the heating fabric is inherently flexible since it incorporates a heating element in a thin layer, itself flexible, as well as textile materials including the nonwoven type.
Cette caractéristique lui permet d'être facilement utilisé sous la forme d'une couverture ou d'un vêtement .  This feature allows it to be easily used in the form of a blanket or clothing.
Ce tissu peut être utilisé sous une tension comprise entre 24 V et 230 V, voire inférieure à 24 V.  This fabric can be used at a voltage between 24 V and 230 V, or even less than 24 V.
Ainsi, le boîtier de régulation peut être connecté à n' importe quelle prise de courant sous une tension de 230 V et il est conçu pour pouvoir transformer cette tension en une très basse tension de sécurité, de l'ordre de 24 V. Cette très basse tension présente des avantages en termes de sécurité pour le patient et le personnel soignant . Thus, the control box can be connected to any socket under a voltage of 230 V and it is designed to be able to transform this voltage into a very low safety voltage, of the order of 24 V. This very low voltage has safety advantages for the patient and the nursing staff.
Bien entendu, l'invention n'est pas limitée aux deux applications du tissu chauffant selon l'invention qui viennent d'être décrites. Les propriétés et les avantages de ce tissu chauffant lui offrent bien au contraire de nombreuses applications, par exemple pour des couvertures de survie.  Of course, the invention is not limited to the two applications of the heating fabric according to the invention which have just been described. The properties and advantages of this heating fabric offer on the contrary many applications, for example for survival blankets.

Claims

REVENDICATIONS
1. Tissu chauffant comprenant un élément chauffant (10, 30) en couche mince avec des moyens conducteurs électriques et au moins une couche réalisée en un matériau électriquement isolant, ainsi que des moyens de connexion (13, 33) dudit élément chauffant à une alimentation électrique, dans lequel lesdits moyens conducteurs électriques sont réalisés en un matériau conducteur dont la résistance varie en fonction de la température et au moins une face dudit élément chauffant est recouverte au moins partiellement d'une couche (11, 12 ; 310, 311, 312, 320, 321, 322, 323) en un matériau textile. A heating fabric comprising a thin film heating element (10, 30) with electrical conducting means and at least one layer made of an electrically insulating material, and means (13, 33) for connecting said heating element to a power supply. wherein said electrical conductor means is made of a conductive material whose resistance varies as a function of temperature and at least one face of said heating element is at least partially covered by a layer (11, 12; 310, 311, 312 , 320, 321, 322, 323) of a textile material.
2. Tissu selon la revendication 1, dans lequel l'élément chauffant (10, 30) comprend des moyens conducteurs électriques en nappe, supportés par une couche d'un matériau électriquement isolant ou disposés entre deux couches d'un matériau électriquement isolant.  2. The fabric of claim 1, wherein the heating element (10, 30) comprises electrical conductive means in sheet, supported by a layer of an electrically insulating material or disposed between two layers of an electrically insulating material.
3. Tissu selon la revendication 1 ou 2, lequel est stérilisé.  3. The fabric of claim 1 or 2, which is sterilized.
4. Tissu selon l'une des revendications 1 à 3, à usage unique.  4. Fabric according to one of claims 1 to 3, disposable.
5. Tissu chauffant selon l'une des revendications Heating fabric according to one of the claims
1 à 4, dans lequel le matériau textile est à base de fibres de polyester ou de polypropylène . 1 to 4, wherein the textile material is based on polyester or polypropylene fibers.
6. Kit comprenant un tissu chauffant selon l'une des revendications 1 à 5 et un boîtier (20) de régulation de l'alimentation électrique, destiné à être connecté entre les moyens de connexion (13, 33) dudit tissu et l'alimentation électrique, ledit boîtier comprenant des moyens pour déterminer la résistance des moyens conducteurs de l'élément chauffant, en déduire la température du tissu à un instant t (Tt) , la comparer à une valeur de consigne (Tc) et réguler l'alimentation en fonction de cette comparaison . 6. Kit comprising a heating fabric according to one of claims 1 to 5 and a housing (20) for regulating the power supply, intended to be connected between the connecting means (13, 33). said fabric and the power supply, said housing comprising means for determining the resistance of the conductive means of the heating element, deriving the temperature of the fabric at a time t (T t ), comparing it with a set value (T c ) and regulate the diet according to this comparison.
7. Couverture réalisée en un tissu chauffant selon l'une des revendications 1 à 5.  7. Blanket made of a heating fabric according to one of claims 1 to 5.
8. Vêtement réalisé en un tissu chauffant selon l'une des revendications 1 à 5.  8. garment made of a heating fabric according to one of claims 1 to 5.
PCT/FR2018/052767 2017-11-09 2018-11-08 Heating fabric, application to a blanket or a garment WO2019092370A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1760533 2017-11-09
FR1760533A FR3073353B1 (en) 2017-11-09 2017-11-09 HEATED FABRIC, BLANKET OR CLOTHING APPLICATION.

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WO2019092370A1 true WO2019092370A1 (en) 2019-05-16

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Publication number Priority date Publication date Assignee Title
TWI717939B (en) * 2019-12-17 2021-02-01 林春福 Electric blanket with integrated temperature detection system

Citations (4)

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US2590212A (en) * 1947-04-02 1952-03-25 Casco Products Corp Heating pad
US20070272673A1 (en) * 2001-08-29 2007-11-29 Keane Barry P Electric mattress and mattress pad
US20080083721A1 (en) * 2006-10-04 2008-04-10 T-Ink, Inc. Heated textiles and methods of making the same
EP2255759A2 (en) 2002-04-10 2010-12-01 Arizant Healthcare Inc. Patient comfort apparatus and system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2590212A (en) * 1947-04-02 1952-03-25 Casco Products Corp Heating pad
US20070272673A1 (en) * 2001-08-29 2007-11-29 Keane Barry P Electric mattress and mattress pad
EP2255759A2 (en) 2002-04-10 2010-12-01 Arizant Healthcare Inc. Patient comfort apparatus and system
US20080083721A1 (en) * 2006-10-04 2008-04-10 T-Ink, Inc. Heated textiles and methods of making the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI717939B (en) * 2019-12-17 2021-02-01 林春福 Electric blanket with integrated temperature detection system

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FR3073353A1 (en) 2019-05-10
FR3073353B1 (en) 2021-03-05

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