ES2224854A1 - Control device for electric pillows and blankets, and similar elements - Google Patents

Control device for electric pillows and blankets, and similar elements

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Publication number
ES2224854A1
ES2224854A1 ES200301345A ES200301345A ES2224854A1 ES 2224854 A1 ES2224854 A1 ES 2224854A1 ES 200301345 A ES200301345 A ES 200301345A ES 200301345 A ES200301345 A ES 200301345A ES 2224854 A1 ES2224854 A1 ES 2224854A1
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Spain
Prior art keywords
insulating layer
heating wire
wire
temperature
control device
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Granted
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ES200301345A
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Spanish (es)
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ES2224854B1 (en
Inventor
Juan Manuel Garcia Reyero
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Especialidades Electricas Daga SA
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Especialidades Electricas Daga SA
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Publication of ES2224854A1 publication Critical patent/ES2224854A1/en
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Publication of ES2224854B1 publication Critical patent/ES2224854B1/en
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Expired - Fee Related legal-status Critical Current

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Abstract

Control device for electric pillows and blankets, and similar elements.It includes a heating wire (1), a fuse (2), and resources (3) for controlling the temperature of said heating wire, and it is characterised in that the heating wire (1) has a conducting barrel (4): an insulating layer (5) of the controlled fusion temperature: a conducting wire winding (6) placed around said insulating layer (5) and an external insulating layer. A second embodiment includes a second wire with an insulating layer that has a negative temperature coefficient, whose wire is serial-connected to the heating wire with an insulation layer of the controlled fusion temperature. In a third embodiment, the heating thread includes a second conducting wire winding with an insulating layer of negative temperature coefficient placed inside the external insulating layer. This improves the safety conditions.

Description

Mejoras en el objeto de la patente principal nº 200100313 por "dispositivo de control para almohadillas, mantas eléctricas y similares".Improvements in the subject of the main patent nº 200100313 for "control device for pads, blankets electrical and similar. "

La presente invención se refiere a mejoras en el objeto de la patente principal nº 200100313, por "dispositivo de control para almohadillas, mantas eléctricas y similares".The present invention relates to improvements in the object of the main patent nº 200100313, for "device of control for pads, electric blankets and the like. "

Antecedentes de la invenciónBackground of the invention

Son conocidos almohadillas, mantas eléctricas y similares utilizadas para proporcionar calor adicional al usuario a voluntad al conectarse a la red eléctrica.They are known pads, electric blankets and similar used to provide additional heat to the user to Will when connecting to the power grid.

Los dispositivos de control comprenden un hilo calefactor, un fusible, y medios de control de la temperatura de dicho hilo calefactor.The control devices comprise a thread heater, a fuse, and temperature control means of said heating wire.

Los medios de control, además de regular el calor suministrado, permiten desconectar la almohadilla de la red eléctrica cuando existe riesgo para el usuario debido a un sobrecalentamiento.The control means, in addition to regulating the heat supplied, allow disconnecting the pad from the network electric when there is a risk to the user due to a overheating

Sin embargo, en las almohadillas, mantas eléctricas y dispositivos similares actualmente existentes en el mercado, en algunos casos no es posible detectar usos indebidos tales como el doblado o arrugado excesivo que pueden provocar incrementos de temperatura que creen ocasiones de riesgo para el usuario.However, on the pads, blankets electrical and similar devices currently existing in the market, in some cases it is not possible to detect misuse such as excessive bending or wrinkling that can cause temperature increases that create risk occasions for Username.

Para solucionar estos inconvenientes, se realizó el dispositivo calefactor descrito en la patente principal que hace referencia a un dispositivo de control para almohadillas, mantas eléctricas y similares, que comprende un hilo calefactor que presenta un ánima conductora; una capa aislante de temperatura de fusión controlada, que recubre dicha ánima conductora; un devanado de hilo conductor dispuesto alrededor de dicha capa aislante; y una capa aislante exterior; de modo que, cuando se hace un mal uso de la almohadilla o similar, (generalmente pliegues o dobleces), aparecen puntos de defecto en los que aumenta la temperatura del hilo conductor. Esto produce un cortocircuito al superarse la temperatura de fusión de la capa aislante, el cual deja sin servicio una parte de la almohadilla o similar, provocándose un aumento de la corriente circulante.To solve these problems, it was carried out the heating device described in the main patent which makes reference to a control device for pads, blankets electrical and the like, comprising a heating wire that it has a conductive mood; a temperature insulating layer of controlled fusion, which covers said conductive bore; a winding of conductive wire disposed around said insulating layer; and one outer insulating layer; so that when you misuse the pad or the like, (usually folds or folds), defect points appear at which the temperature of the conductive thread This produces a short circuit when the melting temperature of the insulating layer, which leaves without service a part of the pad or similar, causing a increased circulating current

En el caso de que la corriente no sea suficiente para fundir el fusible, la almohadilla o similar sigue funcionando sólo en parte, disipando más potencia que al principio, de manera que aparecen nuevos puntos de defecto, hasta que la sobrecorriente provoca la fusión del fusible o del hilo conductor.In case the current is not enough to blow the fuse, the pad or similar continues to work only in part, dissipating more power than at the beginning, so that new defect points appear, until the overcurrent causes the fuse or the lead wire to melt.

Así, sea cual sea el punto de defecto y sea cual sea la parte de la almohadilla o similar que quede activa, la temperatura del hilo no puede superar la temperatura de fusión del aislante interno, la cual, a su vez, es inferior a la temperatura que puede provocar posibles accidentes al usuario.Thus, whatever the point of defect and which be the part of the pad or similar that is active, the thread temperature cannot exceed the melting temperature of the internal insulator, which, in turn, is below the temperature which can cause possible accidents to the user.

Sin embargo, este dispositivo calefactor presenta el inconveniente de que al haber un único elemento regulador de potencia, si este elemento falla y queda cortocircuitado, el dispositivo calefactor queda siempre conectado a la máxima potencia, y el usuario está expuesto a un posible choque térmico por excesiva aplicación del calor.However, this heating device presents the drawback of having a single regulatory element of power, if this element fails and is short-circuited, the heating device is always connected to the maximum power, and the user is exposed to a possible thermal shock by  excessive application of heat.

La patente principal propone también la colocación de dos elementos reguladores de potencia, que mejoran la seguridad, de forma que si falla uno de ellos hay otro elemento que mantiene el control de la potencia en la carga. También en este caso, el dispositivo sigue funcionando normalmente y el usuario no percibe el fallo. En estas condiciones un posible segundo fallo deja al usuario expuesto al choque térmico.The main patent also proposes the placement of two power regulating elements, which improve the security, so if one of them fails there is another element that maintains control of the power in the load. Also in this case, the device continues to function normally and the user does not perceive the failure. Under these conditions a possible second fault leaves the user exposed to thermal shock.

Descripción de la invenciónDescription of the invention

Con el dispositivo de control de la presente invención se consiguen resolver los inconvenientes citados, incorporando elementos de conmutación en serie con el dispositivo calefactor (almohadilla, manta o calientacamas) y un controlador de corriente que permite conocer el estado del circuito en todo momento.With the present control device invention manages to solve the aforementioned drawbacks incorporating serial switching elements with the device heater (pad, blanket or bed warmer) and a controller current that allows to know the state of the circuit in all moment.

Las mejoras de la invención se caracterizan por el hecho de que el dispositivo de control comprende un par de elementos de conmutación conectados en serie al hilo calefactor y un dispositivo electrónico conectado a dichos elementos de conmutación, el cual controla la corriente que circula por cada uno de ellos y bloquea el dispositivo de control cuando detecta presencia de corriente.The improvements of the invention are characterized by the fact that the control device comprises a pair of switching elements connected in series to the heating wire and an electronic device connected to said elements of switching, which controls the current flowing through each of them and locks the control device when it detects presence of current.

El objeto de la presente mejora es aumentar la seguridad del dispositivo de control haciendo que se controle periódicamente el estado de cada uno de los dos elementos de conmutación. En caso de que se detecte el fallo de alguno de ellos, el dispositivo de control queda bloqueado y ya no puede suministrar potencia a la carga. El dispositivo queda inútil para la aplicación de calor y precisa, para su reparación, de un servicio técnico autorizado para poderlo volver a poner en funcionamiento. Se consigue así reducir el riesgo en el usuario debido a un aumento excesivo de la temperatura.The purpose of this improvement is to increase the control device safety by controlling periodically the status of each of the two elements of commutation. In case the failure of any of them is detected, the control device is locked and can no longer supply load power. The device is useless for the application Heat and precise, for repair, a technical service authorized to be able to put it back into operation. Be thus reduce the risk in the user due to an increase excessive temperature

Preferentemente, el hilo calefactor tiene un coeficiente de temperatura positivo, de manera que midiendo su resistencia se obtiene la temperatura del dispositivo.Preferably, the heating wire has a positive temperature coefficient, so measuring your resistance is obtained the temperature of the device.

Ventajosamente, los dos elementos de conmutación son triacs.Advantageously, the two switching elements They are triacs.

Adicionalmente, el dispositivo de control comprende una resistencia en serie con el hilo calefactor.Additionally, the control device It comprises a resistance in series with the heating wire.

Breve descripción de los dibujosBrief description of the drawings

Para mejor comprensión de cuanto se ha expuesto se acompaña un dibujo en el que, esquemáticamente y a título de ejemplo no limitativo, se representa un caso práctico de realización.For a better understanding of how much has been exposed A drawing is attached in which, schematically and as a non-limiting example, a practical case of realization.

La única figura muestra el esquema del dispositivo de control de la invención.The only figure shows the scheme of control device of the invention.

Descripción de la realización preferida de la invenciónDescription of the preferred embodiment of the invention

Tal como muestra la figura, el dispositivo de control comprende un dispositivo electrónico 1 (usualmente un microcontrolador), dos elementos de conmutación 2a y 2b, una resistencia 3 y un hilo calefactor 4 de coeficiente de temperatura positivo que presenta una carga, y que está formado por una anima conductora 5, una capa aislante 6 y una capa aislante exterior 7.As the figure shows, the device control comprises an electronic device 1 (usually a microcontroller), two switching elements 2a and 2b, one resistance 3 and a heating wire 4 of temperature coefficient positive that presents a charge, and that is formed by an anima conductive 5, an insulating layer 6 and an outer insulating layer 7.

En la figura puede verse una realización, según la cual el dispositivo electrónico 1 controla el estado de los dos conmutadores 2a y 2b, y mide la corriente que circula por el hilo calefactor 4 mediante la colocación de una resistencia 3 en serie. Cada cierto tiempo, el dispositivo electrónico 1 hace conducir alternativamente cada uno de los elementos de conmutación 2a y 2b, y mide la corriente que circula. En caso de que uno de los elementos de conmutación 2a o 2b esté cortocircuitado, bloquea el otro y se detecta circulación de corriente por el hilo calefactor 4, cuando no debe circular ya que el otro conmutador 2a o 2b debe estar bloqueado; por tanto, esto implica que hay un defecto en el sistema. A partir de este momento, se bloquea el suministro de corriente al hilo calefactor 4, y es necesario reparar el equipo para que pueda volver a funcionar.An embodiment can be seen in the figure, according to which the electronic device 1 controls the status of the two switches 2a and 2b, and measures the current flowing through the wire heater 4 by placing a resistor 3 in series. From time to time, the electronic device 1 drives alternatively each of the switching elements 2a and 2b, and measure the current flowing. In case one of the elements switching 2a or 2b is shorted, blocks the other one and it detects current flow through heating wire 4, when it must not circulate since the other switch 2a or 2b must be locked; therefore, this implies that there is a defect in the system. As of this moment, the supply of current to the heating wire 4, and it is necessary to repair the equipment So it can work again.

El hilo calefactor 4 tiene un coeficiente de temperatura positivo, y al medir su resistencia en todo momento, se puede conocer la temperatura a la que se encuentra dicho hilo calefactor 4.The heating wire 4 has a coefficient of positive temperature, and when measuring its resistance at all times, it you can know the temperature at which said thread is heater 4.

El dispositivo electrónico 1 mide constantemente la caída de tensión en la resistencia 3 y la tensión de alimentación, por lo que, conoce el valor de la resistencia 3 del hilo calefactor 4. Comparando este valor con el valor de la resistencia 3 en frío, es posible conocer el valor de la resistencia media de la carga y en consecuencia, la temperatura media del dispositivo de control. Este hecho permite regular la carga a los valores prefijados por el usuario.The electronic device 1 constantly measures the voltage drop in resistance 3 and the voltage of power, so you know the value of resistance 3 of the heating wire 4. Comparing this value with the value of the 3 cold resistance, it is possible to know the resistance value average load and consequently the average temperature of the control device This fact allows to regulate the load to the user default values.

Claims (4)

1. Mejoras en el objeto de la patente principal nº P140449, por "dispositivo de control para almohadillas, mantas eléctricas y similares", que comprende un hilo calefactor (4), un fusible, y medios de control de la temperatura de dicho hilo calefactor (4); el hilo calefactor (4) presenta un ánima conductora (5); una capa aislante (6) de temperatura de fusión controlada, que recubre dicha ánima conductora (5); un devanado de hilo conductor dispuesto alrededor de dicha capa aislante (6); y una capa aislante exterior (7); de modo que, cuando se hace un mal uso de la almohadilla o similar, aparecen puntos de defecto en los que aumenta la temperatura del hilo conductor produciéndose un cortocircuito al superarse la temperatura de fusión de la capa aislante (6), el cual deja sin servicio una parte de la almohadilla o similar, y provocándose un aumento de la corriente circulante; en el caso de que la corriente no sea suficiente para fundir el fusible, la almohadilla o similar sigue funcionando sólo en parte, disipando más potencia que al principio, de manera que aparecen nuevos puntos de defecto, hasta que la sobrecorriente provoca la fusión del fusible o del hilo conductor, caracterizadas por el hecho de que comprende un par de elementos de conmutación (2a,2b) conectados en serie al hilo calefactor (4) y un dispositivo electrónico (1) conectado a dichos elementos de conmutación (2a,2b), el cual controla la corriente que circula por cada uno de ellos y bloquea el dispositivo de control cuando detecta presencia de corriente.1. Improvements in the object of the main patent No. P140449, for "control device for pads, electric blankets and the like", comprising a heating wire (4), a fuse, and means for controlling the temperature of said heating wire (4); the heating wire (4) has a conductive bore (5); an insulating layer (6) of controlled melting temperature, which covers said conductive bore (5); a winding of conductive wire disposed around said insulating layer (6); and an outer insulating layer (7); so that, when the pad or the like is misused, defect points appear at which the temperature of the conductive wire increases causing a short circuit when the melting temperature of the insulating layer (6) is exceeded, which leaves without service a part of the pad or the like, and causing an increase in circulating current; in the event that the current is not sufficient to blow the fuse, the pad or the like continues to function only in part, dissipating more power than at the beginning, so that new points of defect appear, until the overcurrent causes the fuse to melt or of the conductive wire, characterized in that it comprises a pair of switching elements (2a, 2b) connected in series to the heating wire (4) and an electronic device (1) connected to said switching elements (2a, 2b) , which controls the current flowing through each of them and blocks the control device when it detects the presence of current. 2. Mejoras según la reivindicación 1, caracterizadas por el hecho de que el hilo calefactor (4) tiene un coeficiente de temperatura positivo.2. Improvements according to claim 1, characterized in that the heating wire (4) has a positive temperature coefficient. 3. Mejoras según la reivindicación 1, caracterizadas por el hecho de que los dos elementos de conmutación (2a,2b) son triacs.3. Improvements according to claim 1, characterized in that the two switching elements (2a, 2b) are triacs. 4. Mejoras según la reivindicación 1, caracterizadas por el hecho de que comprende una resistencia (3) en serie con el hilo calefactor (4).4. Improvements according to claim 1, characterized in that it comprises a resistor (3) in series with the heating wire (4).
ES200301345A 2001-02-13 2003-06-06 IMPROVEMENTS IN THE OBJECT OF THE MAIN PATENT N.200100313, BY CONTROL DEVICE FOR PADS, ELECTRICAL AND SIMILAR BLANKETS. Expired - Fee Related ES2224854B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200100313A ES2172467B1 (en) 2001-02-13 2001-02-13 CONTROL DEVICE FOR PADS, ELECTRICAL AND SIMILAR BLANKETS.

Publications (2)

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ES2224854A1 true ES2224854A1 (en) 2005-03-01
ES2224854B1 ES2224854B1 (en) 2005-12-16

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Application Number Title Priority Date Filing Date
ES200100313A Expired - Fee Related ES2172467B1 (en) 2001-02-13 2001-02-13 CONTROL DEVICE FOR PADS, ELECTRICAL AND SIMILAR BLANKETS.
ES200301345A Expired - Fee Related ES2224854B1 (en) 2001-02-13 2003-06-06 IMPROVEMENTS IN THE OBJECT OF THE MAIN PATENT N.200100313, BY CONTROL DEVICE FOR PADS, ELECTRICAL AND SIMILAR BLANKETS.

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Application Number Title Priority Date Filing Date
ES200100313A Expired - Fee Related ES2172467B1 (en) 2001-02-13 2001-02-13 CONTROL DEVICE FOR PADS, ELECTRICAL AND SIMILAR BLANKETS.

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8400329A (en) * 1984-02-03 1985-09-02 Inventum Koninklijke Fab Overheating protection circuit for electric blanket - has logic circuit cutting off power in response to small currents in detector wire
US4577094A (en) * 1983-10-05 1986-03-18 Fieldcrest Mills, Inc. Electrical heating apparatus protected against an overheating condition
EP0577378A1 (en) * 1992-07-03 1994-01-05 Thermonette Appliances Limited Electric heating cable
EP0910227A2 (en) * 1997-10-17 1999-04-21 IMETEC S.p.A. Flexible heating panel and control unit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2334389B (en) * 1998-02-16 2002-03-06 Dreamland Appliances Ltd Electrically heated panel apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577094A (en) * 1983-10-05 1986-03-18 Fieldcrest Mills, Inc. Electrical heating apparatus protected against an overheating condition
NL8400329A (en) * 1984-02-03 1985-09-02 Inventum Koninklijke Fab Overheating protection circuit for electric blanket - has logic circuit cutting off power in response to small currents in detector wire
EP0577378A1 (en) * 1992-07-03 1994-01-05 Thermonette Appliances Limited Electric heating cable
EP0910227A2 (en) * 1997-10-17 1999-04-21 IMETEC S.p.A. Flexible heating panel and control unit

Also Published As

Publication number Publication date
ES2172467B1 (en) 2003-11-16
ES2172467A1 (en) 2002-09-16
ES2224854B1 (en) 2005-12-16

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