EP0731624A2 - Heating device for waterbeds - Google Patents

Heating device for waterbeds Download PDF

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Publication number
EP0731624A2
EP0731624A2 EP96103374A EP96103374A EP0731624A2 EP 0731624 A2 EP0731624 A2 EP 0731624A2 EP 96103374 A EP96103374 A EP 96103374A EP 96103374 A EP96103374 A EP 96103374A EP 0731624 A2 EP0731624 A2 EP 0731624A2
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EP
European Patent Office
Prior art keywords
metal plate
heating device
underside
conductors
circuit board
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP96103374A
Other languages
German (de)
French (fr)
Other versions
EP0731624B1 (en
EP0731624A3 (en
Inventor
Willem Siebelink
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VONTANA VERTRIEB GMBH & CO. KG
Vontana Industrie GmbH and Co KG
Original Assignee
Vontana Wasserbetten GmbH
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Publication date
Application filed by Vontana Wasserbetten GmbH filed Critical Vontana Wasserbetten GmbH
Publication of EP0731624A2 publication Critical patent/EP0731624A2/en
Publication of EP0731624A3 publication Critical patent/EP0731624A3/en
Application granted granted Critical
Publication of EP0731624B1 publication Critical patent/EP0731624B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses or cushions
    • A47C27/081—Fluid mattresses or cushions of pneumatic type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C21/00—Attachments for beds, e.g. sheet holders, bed-cover holders; Ventilating, cooling or heating means in connection with bedsteads or mattresses
    • A47C21/04—Devices for ventilating, cooling or heating
    • A47C21/048—Devices for ventilating, cooling or heating for heating
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses or cushions
    • A47C27/085—Fluid mattresses or cushions of liquid type, e.g. filled with water or gel
    • 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
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/28—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material
    • H05B3/30—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material on or between metallic plates

Definitions

  • the invention relates to a heating device with electrical resistance conductors for water beds, which is arranged between a bed frame and a safety film and can be regulated as a function of the desired temperature of a water core lying on the safety film.
  • the resistance conductors consist of flexible metallic cables surrounded by a plastic coating, which are regulated according to the principle of a heating pad.
  • These resistance heaters have the disadvantage of creeping voltages, which arise due to the moisture and air diffusing into the space between the electrical conductor and the embedding plastic.
  • These "migrations” can lead to "hotspots” and thus to local overheating and heat build-up, which ultimately leads to a burnout of the resistance conductors due to aging fatigue due to an increased energy yield. Since the vinyl of the plastic sheathing of the resistance conductors is not compatible with the vinyl of the security film, this can happen Plasticizer migration in the security film. Finally, due to their coil-like heating resistance, these resistance conductors are connected to corresponding electromagnetic fields.
  • the invention has for its object to provide a heating device for water beds of the type mentioned, which is characterized in an energy-saving manner with the exclusion of hot spots, heat build-up and plasticizer migration by a significantly improved heat transfer with increased security.
  • This object is achieved in connection with the generic term mentioned at the outset in that it has ceramic plates provided with burned-in electrical conductors, which are glued to the underside of a rigid metal plate with a high thermal conductivity adhesive and form-fittingly with the release of an air gap for the ceramic plates a base plate with poor thermal conductivity is placed on the bed frame. Due to the electrical conductors burned into the ceramic plates, creep stresses can no longer occur. The heat is now transferred from the burned-in electrical conductors to the ceramic plates, from these via the adhesive with high thermal conductivity to the underside of the rigid metal plate and from the top thereof via the safety film to the water core.
  • the heating device according to the invention ensures a much faster and more economical heating of the water core.
  • the electrical conductors are advantageously formed from a pasty mixture of particles of precious metals, such as gold, silver or ruthenium, as well as from ceramic components, such as glass and aluminum oxides, which is burned into the ceramic plates to form a hybrid conductor loop at about 900 ° C.
  • the adhesive has poor electrical conductivity, but high adhesive strength and flexibility, and consists of a special silicone mixture.
  • a plurality of ceramic plates which uniformly heat the rigid metal plate, are glued in a symmetrical arrangement on the underside thereof, and the electrical conductors of each ceramic plate are connected via flexible, electrical, silicon-insulated wire conductors to a PCB with printed current conductors arranged between the ceramic plates Printed circuit board is connected in parallel.
  • the number of ceramic plates required depends on their size and the size of the metal plate to be heated.
  • each ceramic plate has its own heating area, which flows so smoothly into the heating area of an adjacent ceramic plate that, when the heated metal plate is stationary, temperature differences on the top of the metal plate are barely perceptible; in other words, there is very little ripple in the heat transfer on the top of the metal plate.
  • the PCB circuit board is located between the symmetrically arranged ceramic plates, so that a voltage tap between the branded electrical conductors of the ceramic plates and the printed current conductors.
  • the current conductors of the printed circuit board are advantageously connected to a conventional voltage source via a flexible cable attached to one end to the underside of the rigid metal plate and via a manually operated control device via a standard mains plug.
  • a flexible cable attached to one end to the underside of the rigid metal plate and via a manually operated control device via a standard mains plug.
  • a fuse is provided at the input of the cable into the electrical circuit board, which at too high a temperature, for example at over 70 ° C., on the underside of the Metal plate or if the voltage of the public power grid is too high, the circuit between the cable and the conductors of the circuit board breaks.
  • a particularly economical and energy-saving heater also contributes to the fact that the current conductors of the printed circuit board are connected to a relay in the form of a triac, which is likewise fastened to the underside of the metal plate and is connected to the control device. So far, such relays have been arranged in the known heating devices in the control device, which is located outside the waterbed in the vicinity of the user. Since these relays emit not insignificant heat, this is also used to heat the waterbed by arranging a triac on the underside of the metal plate.
  • an NTC sensor Negative Temperature Coefficient Sensor
  • This NTC sensor is linked to the effect that its resistance decreases with increasing heating. This ensures safe control of the heat output transmission with small temperature differences.
  • the rigid metal plate advantageously consists of an aluminum alloy with high thermal conductivity and the likewise rigid base plate made of a heat-resistant plastic such as ABS, polyurethane, polyamide or polyethylene, for example polytetrafluoroethylene. This is to avoid radiation losses through the base plate advantageously provided on its surface facing the underside of the metal plate with a layer reflecting heat rays, for example in the form of vapor-deposited chromium plating or an aluminum foil glued on.
  • a layer reflecting heat rays for example in the form of vapor-deposited chromium plating or an aluminum foil glued on.
  • the base plate is provided at one end with a recess for the passage of the electrical cable and below each ceramic plate and below the circuit board with recesses for these parts with a depth that after the form-fitting placement of the metal plate all heat-conducting metal and ceramic parts to the base plate have an air gap of at least 2 mm.
  • both the rigid metal plate and the base plate are rounded off at their corner areas and together form a very flat, plate-shaped truncated cone without projecting areas. It is also possible to arrange the heating device in a recess of the bed frame in such a way that the surface of the metal plate is flush with the surrounding bed frame surface.
  • the new heating device 1 for a water bed 2 is arranged between the bed frame 3 and a safety film 4 and can be regulated as a function of the desired temperature of the water core 5 lying on the safety film 4 by means of the control device 6 which is to be operated manually and is located outside of it.
  • the control device 6 is on the one hand via a flexible cable 7 with the Heating device 1 and on the other hand can be connected via a commercially available power plug 8 to a conventional voltage source in the form of a socket.
  • the water core 5 is enclosed by a plastic cover 9 and is covered by a cover 10.
  • the heating device 1 consists of a rigid metal plate 11 of high thermal conductivity, which with its underside 11a is positively placed on a base plate 12 of poor thermal conductivity on the bed frame 3 or in a recess provided therein.
  • the heat is transmitted from the surface 11b of the metal plate 11 through the security film 4 and further through the plastic casing 9 to the water core 5.
  • the water is heated by natural convection of the water core 5 in connection with induced water movements within the casing 9 when the water core 5 is loaded.
  • a total of six ceramic plates 13-18 are attached to the underside 11a of the metal plate 11 in a symmetrical arrangement in a symmetrical arrangement by means of an adhesive 19 (see FIG. 5) with high thermal conductivity.
  • This adhesive 19 has poor electrical conductivity, but one high adhesive strength and flexibility and consists of a silicone mixture.
  • a PCB circuit board 20 printed circuit board
  • printed current conductors 21, 22 is glued onto the underside 11a of the metal plate 11.
  • Each ceramic plate is provided with burned-in electrical conductors 23, which are formed from a pasty mixture of particles of precious metals, such as gold, silver or ruthenium, as well as from ceramic components, such as glass and aluminum oxides, which at about 900 ° C into the ceramic plates 13-18 is burned into a hybrid conductor loop.
  • the current conductors 21, 22 of the printed circuit board 20 are connected via the control device 6 to a commercially available mains plug 8 via a flexible line cable 7 fastened to one end 24 on the underside 11a of the metal plate 11.
  • a fuse 25 is provided which, at too high a temperature, for example at 70 ° C., on the underside 11a of the metal plate 11 or at too high a voltage and thus too high a current consumption, the circuit between the cable 7 and the current conductors 21, 22 of the circuit board 20 interrupts.
  • Each electrical conductor 23 of the ceramic plates 13-18 is each via a flexible, electrical and silicone-insulated wire conductor 26, 27 with the printed current conductors 21, 22 connected and all conductors 23 arranged in parallel.
  • the current conductors 21, 22 of the printed circuit board 20 are connected to a relay 28 in the form of a triac, which is likewise fastened to the underside 11a of the metal plate 11 and is connected to the control device 6.
  • an NTC sensor (Negative Temperature Coefficient Sensor) 29 is arranged on the underside 11a of the metal plate 11 and is likewise connected to the control device 6.
  • the relay 28 in the form of the triac and the NTC sensor 29 are also used in an elegant manner for heating the water bed, as a result of which the control device 6 merely fulfills the function of a switch that operates with no heat radiation worth mentioning is affected.
  • the rigid metal plate 11 advantageously consists of an aluminum alloy with high thermal conductivity and the likewise rigid base plate 12 made of a heat-resistant plastic such as ABS, polyurethane, polyamide or polyethylene with poor thermal conductivity. Because aluminum alloys are six to eight times higher Having a coefficient of thermal conductivity ⁇ as steels, they are particularly well suited for use as a heat transfer surface.
  • the base plate 12 has the function of a rigid construction and a thermal insulation.
  • the base plate 12 is advantageously provided on its surface 12a facing the underside 11a of the metal plate 11 with a layer reflecting heat rays, for example a chroming or aluminum foil.
  • the base plate 12 has on its surface side 12a at one end a cutout 30 for the passage of the cable 7 and below each ceramic plate 13-18 recesses 31 and the central recess 32 for the printed circuit board 20.
  • These recesses 31, 32 are such that after the form-fitting placement of the metal plate 11 on the base plate 12, all heat-conducting metal and ceramic parts 13-18; 20-23; 25-29 to the surface 12a of the base plate 12 have an air gap 33 (see FIG. 6) of at least 2 mm. Since air represents excellent thermal insulation due to its poor thermal conductivity, heat radiation of the metal plate 11 with a direction that is averted from the water core 5 and thus undesirable is largely prevented in this way with a simple measure.
  • both the rigid metal plate 11 and the base plate 12 are rounded at their corner areas and together form a very flat, plate-shaped truncated cone without any projections, which also fits into a flat recess in the bed support surface 3a can be used that the surface 11b of the metal plate 11 is aligned with the bed support surface 3a.
  • the heating device 1 With the heating device 1 according to the invention, it is possible to achieve a temperature between 29 ° C. and 40 ° C. on the top 11b of the metal plate 11, which temperature also corresponds approximately to the temperature on the bottom 11a of the metal plate 11.
  • the water core 5 can be heated to a skin temperature on the surface of the casing 9 from 27 ° C. to 36 ° C.
  • a temperature in the same range, namely between 27 ° C. and 36 ° C., is then also present on the underside of the base plate 12. Since the temperature on the underside of the base plate 12 is thus equal to the temperature on the surface of the casing 9, additional radiation losses due to an increased temperature difference, as in the case of the resistance wire heaters according to the prior art, are excluded.

Abstract

A heating device for water beds comprises a plurality of electrical resistance conductors arranged between a bed frame and a safety foil, means for controlling the conductors in dependence on the desired temperature of a water core locatable under the safety foil, a plurality of ceramic plates arranged so that the conductors are burnt-in the ceramic plates, a bending resistant metal plate having a lower side, the ceramic plates being glued to the lower side of the metal plate by an adhesive having high thermal conductivity, and a base plate having poor thermal conductivity and placeable on the bed frame, the metal plate being arranged on the base plate in a form-locking manner with an air gap for the ceramic plates.

Description

Die Erfindung betrifft eine Heizungsvorrichtung mit elektrischen Widerstandsleitern für Wasserbetten, die zwischen einem Bettgestell und einer Sicherheitsfolie angeordnet und in Abhängigkeit von der gewünschten Temperatur eines auf der Sicherheitsfolie liegenden Wasserkerns regelbar ist.The invention relates to a heating device with electrical resistance conductors for water beds, which is arranged between a bed frame and a safety film and can be regulated as a function of the desired temperature of a water core lying on the safety film.

Bei einer durch offenkundige Benutzung bekannt gewordenen Heizungsvorrichtung dieser Art bestehen die Widerstandsleiter aus flexiblen, mit einer Kunststoffbeschichtung umgebenden metallischen Kabeln, die nach dem Prinzip eines Heizkissens geregelt werden. Diese Widerstandsheizungen sind mit dem Nachteil von Kriechspannungen behaftet, die durch die in den Raum zwischen dem elektrischen Leiter und dem einbettenden Kunststoff hineindiffundierenden Feuchtigkeit und Luft entstehen. Durch diese "Migrations" kann es zu "Hotspots" und damit zu örtlichen Überhitzungen und Wärmestaus kommen, die letztlich über eine erhöhte Energieausbeute zu einem Durchbrennen der Widerstandsleiter bei Altersermüdung führt. Da sich das Vinyl der Kunststoffummantelung der Widerstandsleiter nicht mit dem Vinyl der Sicherheitsfolie verträgt, kann dies zu Weichmacherwanderungen in der Sicherheitsfolie führen. Und schließlich sind diese Widerstandsleiter aufgrund ihres spulenähnlichen Heizwiderstandes mit entsprechenden elektromagnetischen Feldern verbunden.In a heating device of this type which has become known through public use, the resistance conductors consist of flexible metallic cables surrounded by a plastic coating, which are regulated according to the principle of a heating pad. These resistance heaters have the disadvantage of creeping voltages, which arise due to the moisture and air diffusing into the space between the electrical conductor and the embedding plastic. These "migrations" can lead to "hotspots" and thus to local overheating and heat build-up, which ultimately leads to a burnout of the resistance conductors due to aging fatigue due to an increased energy yield. Since the vinyl of the plastic sheathing of the resistance conductors is not compatible with the vinyl of the security film, this can happen Plasticizer migration in the security film. Finally, due to their coil-like heating resistance, these resistance conductors are connected to corresponding electromagnetic fields.

Von diesem Stand der Technik ausgehend, liegt der Erfindung die Aufgabe zugrunde, eine Heizungsvorrichtung für Wasserbetten der eingangs genannten Art zu schaffen, die sich in energiesparender Weise unter dem Ausschluß von Hotspots, Wärmestaus und Weichmacherwanderungen durch eine erheblich verbesserte Wärmeübertragung bei erhöhter Sicherheit auszeichnet.Starting from this prior art, the invention has for its object to provide a heating device for water beds of the type mentioned, which is characterized in an energy-saving manner with the exclusion of hot spots, heat build-up and plasticizer migration by a significantly improved heat transfer with increased security.

Diese Aufgabe wird in Verbindung mit dem eingangs genannten Gattungsbegriff erfindungsgemäß dadurch gelöst, daß sie mit eingebrannten, elektrischen Leitern versehene Keramikplatten aufweist, die mit einem Klebstoff hoher Wärmeleitfähigkeit auf die Unterseite einer biegesteifen Metallplatte geklebt sind, die unter Freilassung eines Luftspaltes für die Keramikplatten formschlüssig auf eine Sockelplatte schlechter Wärmeleitfähigkeit auf dem Bettgestell aufgesetzt ist. Aufgrund der in die Keramikplatten eingebrannten elektrischen Leiter können keine Kriechspannungen mehr auftreten. Die Wärmeübertragung erfolgt nunmehr von den eingebrannten elektrischen Leitern auf die Keramikplatten, von diesen über den Klebstoff hoher Wärmeleitfähigkeit auf die Unterseite der biegesteifen Metallplatte und von deren Oberseite über die Sicherheitsfolie auf den Wasserkern. Da nunmehr die Sicherheitsfolie mit der Metallplatte kontaktiert, erfolgt in energiesparender Weise eine erheblich verbesserte Wärmeübertragung, da eine diese beeinträchtigende Kunststoffummantelung wie bei den Widerstandsdrahtheizungen fehlt. Auch Weichmacherwanderungen sind ausgeschlossen. Aufgrund der Biegesteifigkeit der Metallplatte befinden sich sämtliche Stromleiter in geschützter Anordnung zwischen der Unterseite der Metallplatte und der Sockelplatte. Da spulenähnliche Widerstände nicht vorhanden sind, können auch keine erwähnenswerten elektrischen Felder entstehen. Da nunmehr die elektrischen Leiter in die Keramikplatten eingebrannt sind und nicht wie bei den herkömmlichen Widerstandsheizungen von Kunststoff ummantelt sind, der eine um zwei Zehnerpotenzen schlechtere Wärmeleitzahl gegenüber Metallen aufweist, gewährleistet die erfindungsgemäße Heizungsvorrichtung eine wesentlich schnellere und wirtschaftlichere Aufheizung des Wasserkerns.This object is achieved in connection with the generic term mentioned at the outset in that it has ceramic plates provided with burned-in electrical conductors, which are glued to the underside of a rigid metal plate with a high thermal conductivity adhesive and form-fittingly with the release of an air gap for the ceramic plates a base plate with poor thermal conductivity is placed on the bed frame. Due to the electrical conductors burned into the ceramic plates, creep stresses can no longer occur. The heat is now transferred from the burned-in electrical conductors to the ceramic plates, from these via the adhesive with high thermal conductivity to the underside of the rigid metal plate and from the top thereof via the safety film to the water core. Since the safety film is now in contact with the metal plate, a significantly improved heat transfer takes place in an energy-saving manner, since there is no plastic sheathing which impairs this, as is the case with resistance wire heaters. Plasticizer migrations are also excluded. Due to the bending stiffness of the metal plate, all current conductors are in a protected arrangement between the underside of the metal plate and the base plate. Since there are no coil-like resistors, no electrical fields worth mentioning can arise. Since the electrical conductors are now burned into the ceramic plates and are not encased in plastic, as is the case with conventional resistance heaters, which has a lower coefficient of thermal conductivity than metals by two orders of magnitude compared to metals, the heating device according to the invention ensures a much faster and more economical heating of the water core.

Vorteilhaft sind die elektrischen Leiter aus einem pastösen Gemisch aus Partikeln von Edelmetallen, wie Gold, Silber oder Ruthenium, sowie aus keramischen Bestandteilen, wie Glas und Aluminiumoxyden, gebildet, welches bei etwa 900 °C in die Keramikplatten zu einer hybriden Leiterschleife eingebrannt wird. Der Klebstoff weist eine schlechte elektrische Leitfähigkeit, jedoch eine hohe Klebekraft und Flexibilität auf und besteht aus einem speziellen Silikongemisch. Durch das hybride Gemisch der Leiter, welches sowohl metallische Leiterwerkstoffe als auch keramische Bestandteile der Sinterkeramik enthält, werden diese mittels eines Einbrennprozesses zu einem innigen wärmeleitenden Kontakt mit den Keramikplatten verbunden.The electrical conductors are advantageously formed from a pasty mixture of particles of precious metals, such as gold, silver or ruthenium, as well as from ceramic components, such as glass and aluminum oxides, which is burned into the ceramic plates to form a hybrid conductor loop at about 900 ° C. The adhesive has poor electrical conductivity, but high adhesive strength and flexibility, and consists of a special silicone mixture. Through the hybrid A mixture of the conductors, which contains both metallic conductor materials and ceramic components of the sintered ceramic, these are connected to an intimate heat-conducting contact with the ceramic plates by means of a baking process.

Nach einer besonders vorteilhaften Weiterbildung der Erfindung sind mehrere, die biegesteife Metallplatte gleichmäßig aufheizende Keramikplatten in symmetrischer Anordnung auf deren Unterseite geklebt und die elektrischen Leiter jeder Keramikplatte über flexible, elektrische, Silikon isolierte Drahtleiter mit einer zwischen den Keramikplatten angeordneten, mit gedruckten Stromleitern versehene PCB-Leiterplatte (Printed Circuit Board) in Parallelschaltung verbunden ist. Die Anzahl der erforderlichen Keramikplatten richtet sich nach ihrer Größe sowie nach der Größe der aufzuheizenden Metallplatte. Die symmetrische Anordnung ist dahingehend zu verstehen, daß jede Keramikplatte ihren eigenen Aufheizungsbereich aufweist, der derart fließend in den Aufheizungebereich einer benachbarten Keramikplatte übergeht, daß in stationärem Zustand der aufgeheizten Metallplatte Temperaturunterschiede auf der Oberseite der Metallplatte kaum noch wahrnehmbar sind; oder anders ausgedrückt, auf der Oberseite der Metallplatte ist nur eine sehr geringe Welligkeit der Wärmeübertragung festzustellen. Die PCB-Leiterplatte befindet sich zwischen den symmetrisch angeordneten Keramikplatten, so daß ein Spannungsabgriff auf kürzestem Wege zwischen den eingebrannten elektrischen Leitern der Keramikplatten und den gedruckten Stromleitern erfolgt.According to a particularly advantageous development of the invention, a plurality of ceramic plates, which uniformly heat the rigid metal plate, are glued in a symmetrical arrangement on the underside thereof, and the electrical conductors of each ceramic plate are connected via flexible, electrical, silicon-insulated wire conductors to a PCB with printed current conductors arranged between the ceramic plates Printed circuit board is connected in parallel. The number of ceramic plates required depends on their size and the size of the metal plate to be heated. The symmetrical arrangement is to be understood in such a way that each ceramic plate has its own heating area, which flows so smoothly into the heating area of an adjacent ceramic plate that, when the heated metal plate is stationary, temperature differences on the top of the metal plate are barely perceptible; in other words, there is very little ripple in the heat transfer on the top of the metal plate. The PCB circuit board is located between the symmetrically arranged ceramic plates, so that a voltage tap between the branded electrical conductors of the ceramic plates and the printed current conductors.

Vorteilhaft sind die Stromleiter der Leiterplatte über ein an einem Ende an der Unterseite der biegesteifen Metallplatte befestigtes flexibles Leitungskabel sowie über eine von Hand zu betätigende Regeleinrichtung über einen handelsüblichen Netzstecker mit einer hausüblichen Spannungsquelle verbunden. Dadurch bleibt die bisherige Bedienungsfreundlichkeit erhalten, und das flexible Leitungskabel erhält durch seine Befestigung an der Unterseite der biegesteifen Metallplatte einen massiven Schutz an seiner kritischen Anschlußstelle gegenüber den erheblichen und ständigen, vom Wasserkern herrührenden Druckkräften, die aufgrund des Wasserkerns nicht nur statisch, sondern bei dessen Belastung auch dynamisch wirken können.The current conductors of the printed circuit board are advantageously connected to a conventional voltage source via a flexible cable attached to one end to the underside of the rigid metal plate and via a manually operated control device via a standard mains plug. This maintains the previous ease of use, and the flexible cable is attached to the underside of the rigid metal plate to provide massive protection at its critical connection point against the considerable and constant pressure forces originating from the water core, which are not only static due to the water core, but with it Can also act dynamically.

Um bei starken Spannungsschwankungen im öffentlichen Stromnetz sowohl die erfindungsgemäße Heizungsvorrichtung als auch das Wasserbett vor Beschädigungen zu schützen, ist am Eingang des Leitungskabels in die elektrische Leiterplatte eine Sicherung vorgesehen, die bei zu hoher Temperatur, z.B. bei über 70 °C, an der Unterseite der Metallplatte oder bei zu hoher Spannung des öffentlichen Stromnetzes den Stromkreis zwischen dem Leitungskabel und den Stromleitern der Leiterplatte unterbricht.In order to protect both the heating device according to the invention and the waterbed from damage in the event of strong voltage fluctuations in the public power grid, a fuse is provided at the input of the cable into the electrical circuit board, which at too high a temperature, for example at over 70 ° C., on the underside of the Metal plate or if the voltage of the public power grid is too high, the circuit between the cable and the conductors of the circuit board breaks.

Zu einer besonders wirtschaftlichen und energiesparenden Heizung trägt auch bei, daß die Stromleiter der Leiterplatte mit einem Relais in Form eines Triacs verbunden sind, welches gleichfalls an der Unterseite der Metallplatte befestigt ist und mit der Regeleinrichtung in Verbindung steht. Bislang sind derartige Relais bei den bekannten Heizungsvorrichtungen in der Regeleinrichtung angeordnet, die sich außerhalb des Wasserbettes in Handhabungsnähe des Benutzers befindet. Da von diesen Relais eine nicht unerhebliche Wärmeabstrahlung erfolgt, wird diese durch die Anordnung eines Triacs an der Unterseite der Metallplatte gleichfalls zur Beheizung des Wasserbettes ausgenutzt.A particularly economical and energy-saving heater also contributes to the fact that the current conductors of the printed circuit board are connected to a relay in the form of a triac, which is likewise fastened to the underside of the metal plate and is connected to the control device. So far, such relays have been arranged in the known heating devices in the control device, which is located outside the waterbed in the vicinity of the user. Since these relays emit not insignificant heat, this is also used to heat the waterbed by arranging a triac on the underside of the metal plate.

Ferner ist vorteilhaft an der Unterseite der biegesteifen Metallplatte ein NTC-Sensor (Negative Temperature Coefficient-Sensor) angeordnet, der gleichfalls mit der Regeleinrichtung verbunden ist. Dieser NTC-Sensor ist mit der Wirkung verknüpft, daß bei steigender Erhitzung sein Widerstand abnimmt. Dadurch wird eine sichere Regelung der Wärmeleistungsübertragung bei geringen Temperaturdifferenzen sichergestellt.Furthermore, an NTC sensor (Negative Temperature Coefficient Sensor) is advantageously arranged on the underside of the rigid metal plate and is also connected to the control device. This NTC sensor is linked to the effect that its resistance decreases with increasing heating. This ensures safe control of the heat output transmission with small temperature differences.

Die biegesteife Metallplatte besteht vorteilhaft aus einer Aluminiumlegierung hoher Wärmeleitfähigkeit und die gleichfalls biegesteife Sockelplatte aus einem warmfesten Kunststoff, wie ABS, Polyurethan, Polyamid oder Polyethylen, z.B. Polytetrafluorethylen. Zur Vermeidung von Abstrahlungsverlusten über die Sockelplatte ist diese vorteilhaft an ihrer der Unterseite der Metallplatte zugekehrten Fläche mit einer Wärmestrahlen reflektierenden Schicht versehen, z.B. in Form einer aufgedampften Chromierung oder einer aufgeklebten Aluminiumfolie.The rigid metal plate advantageously consists of an aluminum alloy with high thermal conductivity and the likewise rigid base plate made of a heat-resistant plastic such as ABS, polyurethane, polyamide or polyethylene, for example polytetrafluoroethylene. This is to avoid radiation losses through the base plate advantageously provided on its surface facing the underside of the metal plate with a layer reflecting heat rays, for example in the form of vapor-deposited chromium plating or an aluminum foil glued on.

Zur Minimierung von Abstrahlungsverlusten trägt auch bei, wenn die Sockelplatte an einem Ende mit einer Aussparung zur Durchführung des elektrischen Leitungskabels und unterhalb einer jeden Keramikplatte sowie unterhalb der Leiterplatte mit Ausnehmungen für diese Teile mit einer Tiefe versehen ist, daß nach dem formschlüssigen Aufsetzen der Metallplatte sämtliche wärmeleitenden Metall- und Keramikteile zur Sockelplatte einen Luftspalt von mindestens 2 mm aufweisen.To minimize radiation losses also helps if the base plate is provided at one end with a recess for the passage of the electrical cable and below each ceramic plate and below the circuit board with recesses for these parts with a depth that after the form-fitting placement of the metal plate all heat-conducting metal and ceramic parts to the base plate have an air gap of at least 2 mm.

Zur Vermeidung von Beschädigungen der Sicherheitsfolie bei gleichzeitiger hervorragender Wärmeübertragung der Metallplatte auf den Wasserkern sind sowohl die biegesteife Metallplatte als auch die Sockelplatte an ihren Eckenbereichen abgerundet und bilden gemeinsam einen sehr flachen, plattenförmigen Kegelstumpf ohne vorspringende Bereiche. Es ist auch möglich, die Heizungsvorrichtung in einem Rücksprung des Bettgestells derart anzuordnen, daß die Oberfläche der Metallplatte zur umgebenden Bettgestellfläche fluchtet.In order to avoid damage to the security film while at the same time providing excellent heat transfer from the metal plate to the water core, both the rigid metal plate and the base plate are rounded off at their corner areas and together form a very flat, plate-shaped truncated cone without projecting areas. It is also possible to arrange the heating device in a recess of the bed frame in such a way that the surface of the metal plate is flush with the surrounding bed frame surface.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt. Dabei zeigen:

  • Fig. 1 eine perspektivische Explosionsansicht auf ein Wasserbett mit einer zwischen dem Bettgestell und der Sicherheitsfolie angeordneten Heizungsvorrichtung,
  • Fig. 2 eine Querschnittsansicht durch ein Wasserbett mit einer zwischen Bettgestell und Sicherheitsfolie angeordneten Heizungsvorrichtung gemäß Fig. 1,
  • Fig. 3 eine perspektivische Explosionsansicht der aus Metallplatte, Sockelplatte und Regeleinrichtung bestehenden Heizungsvorrichtung,
  • Fig. 4 die Unteransicht der Metallplatte von Fig. 3,
  • Fig. 5 eine Schnittansicht entlang der Linie V-V von Fig. 3 und
  • Fig. 6 die Ansicht von Fig. 5 nach dem Aufsetzen der Metallplatte auf die Sockelplatte.
An embodiment of the invention is shown in the drawings. Show:
  • 1 is an exploded perspective view of a water bed with a heating device arranged between the bed frame and the security film,
  • 2 shows a cross-sectional view through a water bed with a heating device according to FIG. 1 arranged between the bed frame and the safety film,
  • 3 is an exploded perspective view of the heating device consisting of metal plate, base plate and control device,
  • 4 is the bottom view of the metal plate of FIG. 3,
  • Fig. 5 is a sectional view taken along the line VV of Fig. 3 and
  • Fig. 6 is the view of Fig. 5 after placing the metal plate on the base plate.

Die neue Heizungsvorrichtung 1 für ein Wasserbett 2 wird zwischen dem Bettgestell 3 und einer Sicherheitsfolie 4 angeordnet und ist in Abhängigkeit von der gewünschten Temperatur des auf der Sicherheitsfolie 4 liegenden Wasserkerns 5 mittels der per Hand zu betätigenden und außerhalb davon befindlichen Regeleinrichtung 6 regelbar. Die Regeleinrichtung 6 ist einerseits über ein flexibles Leitungskabel 7 mit der Heizungsvorrichtung 1 und andererseits über einen handelsüblichen Netzstecker 8 mit einer hausüblichen Spannungsquelle in Form einer Steckdose verbindbar.The new heating device 1 for a water bed 2 is arranged between the bed frame 3 and a safety film 4 and can be regulated as a function of the desired temperature of the water core 5 lying on the safety film 4 by means of the control device 6 which is to be operated manually and is located outside of it. The control device 6 is on the one hand via a flexible cable 7 with the Heating device 1 and on the other hand can be connected via a commercially available power plug 8 to a conventional voltage source in the form of a socket.

Wie aus den Figuren 1 und 2 entnommen werden kann, wird der Wasserkern 5 von einer Hülle 9 aus Kunststoff eingeschlossen und ist von einer Abdeckung 10 übergriffen.As can be seen from FIGS. 1 and 2, the water core 5 is enclosed by a plastic cover 9 and is covered by a cover 10.

Gemäß den Figuren 3 bis 6 besteht die erfindungsgemäße Heizungsvorrichtung 1 aus einer biegesteifen Metallplatte 11 hoher Wärmeleitfähigkeit, die mit ihrer Unterseite 11a formschlüssig auf eine Sockelplatte 12 schlechter Wärmeleitfähigkeit auf dem Bettgestell 3 oder in eine darin vorgesehene Ausnehmung aufgesetzt ist. Von der Oberfläche 11b der Metallplatte 11 wird die Wärme durch die Sicherheitsfolie 4 hindurch sowie weiter durch die Kunststoffhülle 9 auf den Wasserkern 5 übertragen. Durch natürliche Konvektion des Wasserkerns 5 in Verbindung mit induzierten Wasserbewegungen innerhalb der Hülle 9 bei Belastung des Wasserkerns 5 wird das Wasser erwärmt.According to FIGS. 3 to 6, the heating device 1 according to the invention consists of a rigid metal plate 11 of high thermal conductivity, which with its underside 11a is positively placed on a base plate 12 of poor thermal conductivity on the bed frame 3 or in a recess provided therein. The heat is transmitted from the surface 11b of the metal plate 11 through the security film 4 and further through the plastic casing 9 to the water core 5. The water is heated by natural convection of the water core 5 in connection with induced water movements within the casing 9 when the water core 5 is loaded.

Gemäß den Figuren 4 bis 6 sind an der Unterseite 11a der Metallplatte 11 in symmetrischer Anordnung insgesamt sechs Keramikplatten 13-18 in symmetrischer Anordnung mittels eines Klebstoffes 19 (s. Fig. 5) mit hoher Wärmeleitfähigkeit befestigt. Dieser Klebstoff 19 besitzt eine schlechte elektrische Leitfähigkeit, jedoch eine hohe Klebekraft und Flexibilität und besteht aus einem Silikongemisch. Genau zwischen den beiden symmetrischen Reihen 13-15 und 16-18 der Keramikplatten 13-18 ist auf die Unterseite 11a der Metallplatte 11 eine mit gedruckten Stromleitern 21, 22 versehene PCB-Leiterplatte 20 (Printed Circuit Board) aufgeklebt.According to FIGS. 4 to 6, a total of six ceramic plates 13-18 are attached to the underside 11a of the metal plate 11 in a symmetrical arrangement in a symmetrical arrangement by means of an adhesive 19 (see FIG. 5) with high thermal conductivity. This adhesive 19 has poor electrical conductivity, but one high adhesive strength and flexibility and consists of a silicone mixture. Exactly between the two symmetrical rows 13-15 and 16-18 of the ceramic plates 13-18, a PCB circuit board 20 (printed circuit board) provided with printed current conductors 21, 22 is glued onto the underside 11a of the metal plate 11.

Jede Keramikplatte ist mit eingebrannten, elektrischen Leitern 23 versehen, die aus einem pastösen Gemisch aus Partikeln von Edelmetallen, wie Gold, Silber oder Ruthenium, sowie aus keramischen Bestandteilen, wie Glas und Aluminiumoxyden, gebildet sind, welches bei etwa 900 °C in die Keramikplatten 13-18 zu einer hybriden Leiterschleife eingebrannt ist. Die Stromleiter 21, 22 der Leiterplatte 20 sind über ein an einem Ende 24 an der Unterseite 11a der Metallplatte 11 befestigtes flexibles Leitungskabel 7 über die Regeleinrichtung 6 mit einem handelsüblichen Netzstecker 8 verbunden. Am Eingang des Leitungskabels 7 in die elektrische Leiterplatte 20 ist eine Sicherung 25 vorgesehen, die bei zu hoher Temperatur, z.B. bei 70 °C, an der Unterseite 11a der Metallplatte 11 oder bei zu hoher Spannung und damit zu hoher Stromaufnahme den Stromkreis zwischen dem Leitungskabel 7 und den Stromleitern 21, 22 der Leiterplatte 20 unterbricht. Dabei ist jeder elektrische Leiter 23 der Keramikplatten 13-18 über je einen flexiblen, elektrischen sowie Silikon isolierten Drahtleiter 26, 27 mit den gedruckten Stromleitern 21, 22 verbunden und sämtliche Leiter 23 in Parallelschaltung angeordnet.Each ceramic plate is provided with burned-in electrical conductors 23, which are formed from a pasty mixture of particles of precious metals, such as gold, silver or ruthenium, as well as from ceramic components, such as glass and aluminum oxides, which at about 900 ° C into the ceramic plates 13-18 is burned into a hybrid conductor loop. The current conductors 21, 22 of the printed circuit board 20 are connected via the control device 6 to a commercially available mains plug 8 via a flexible line cable 7 fastened to one end 24 on the underside 11a of the metal plate 11. At the input of the cable 7 into the electrical circuit board 20, a fuse 25 is provided which, at too high a temperature, for example at 70 ° C., on the underside 11a of the metal plate 11 or at too high a voltage and thus too high a current consumption, the circuit between the cable 7 and the current conductors 21, 22 of the circuit board 20 interrupts. Each electrical conductor 23 of the ceramic plates 13-18 is each via a flexible, electrical and silicone-insulated wire conductor 26, 27 with the printed current conductors 21, 22 connected and all conductors 23 arranged in parallel.

Ferner sind die Stromleiter 21, 22 der Leiterplatte 20 mit einem Relais 28 in Form eines Triacs verbunden, welches gleichfalls an der Unterseite 11a der Metallplatte 11 befestigt ist und mit der Regeleinrichtung 6 in Verbindung steht.Furthermore, the current conductors 21, 22 of the printed circuit board 20 are connected to a relay 28 in the form of a triac, which is likewise fastened to the underside 11a of the metal plate 11 and is connected to the control device 6.

Und schließlich ist an der Unterseite 11a der Metallplatte 11 ein NTC-Sensor (Negative Temperature Coefficient-Sensor) 29 angeordnet, der gleichfalls mit der Regeleinrichtung 6 in Verbindung steht. Durch die Hineinverlegung des Relais 28 in Form des Triacs sowie des NTC-Sensors 29 an die Unterseite der Metallplatte 11 werden diese wärmeabstrahlenden Regelteile gleichfalls in eleganter Weise zur Beheizung des Wasserbettes ausgenutzt, wodurch die Regeleinrichtung 6 lediglich noch die Funktion eines Schalters erfüllt, der mit keiner erwähnenswerten Wärmeabstrahlung mehr behaftet ist.Finally, an NTC sensor (Negative Temperature Coefficient Sensor) 29 is arranged on the underside 11a of the metal plate 11 and is likewise connected to the control device 6. By relocating the relay 28 in the form of the triac and the NTC sensor 29 to the underside of the metal plate 11, these heat-radiating control parts are also used in an elegant manner for heating the water bed, as a result of which the control device 6 merely fulfills the function of a switch that operates with no heat radiation worth mentioning is affected.

Die biegesteife Metallplatte 11 besteht vorteilhaft aus einer Aluminiumlegierung hoher Wärmeleitfähigkeit und die gleichfalls biegesteife Sockelplatte 12 aus einem warmfesten Kunststoff, wie ABS, Polyurethan, Polyamid oder Polyethylen schlechter Wärmeleitfähigkeit. Da Aluminiumlegierungen eine sechs- bis achtmal höhere Wärmeleitzahl λ aufweisen als Stähle, sind sie besonders gut für den Einsatz als Wärmeübertragungsfläche geeignet.The rigid metal plate 11 advantageously consists of an aluminum alloy with high thermal conductivity and the likewise rigid base plate 12 made of a heat-resistant plastic such as ABS, polyurethane, polyamide or polyethylene with poor thermal conductivity. Because aluminum alloys are six to eight times higher Having a coefficient of thermal conductivity λ as steels, they are particularly well suited for use as a heat transfer surface.

Demgegenüber kommt der Sockelplatte 12 die Funktion einer biegesteifen Tragkonstruktion sowie eines Wärmedämmers zu. Um den Vektor der Wärmeübertragung gezielt in Richtung auf den Wasserkern 5 zu lenken, ist die Sockelplatte 12 vorteilhaft an ihrer der Unterseite 11a der Metallplatte 11 zugekehrten Fläche 12a mit einer Wärmestrahlen reflektierenden Schicht, z.B. einer Chromierung oder Aluminiumfolie, versehen. Außerdem weist die Sockelplatte 12 an ihrer Oberflächenseite 12a an einem Ende eine Aussparung 30 zur Durchführung des Leitungskabels 7 und unterhalb einer jeden Keramikplatte 13-18 Ausnehmungen 31 sowie die mittige Ausnehmung 32 für die Leiterplatte 20 auf. Diese Ausnehmungen 31, 32 sind so beschaffen, daß nach dem formschlüssigen Aufsetzen der Metallplatte 11 auf die Sockelplatte 12 sämtliche wärmeleitenden Metall- und Keramikteile 13-18; 20-23; 25-29 zur Oberfläche 12a der Sockelplatte 12 einen Luftspalt 33 (s. Fig. 6) von mindestens 2 mm aufweisen. Da Luft aufgrund ihrer schlechten Wärmeleitfähigkeit eine hervorragende Wärmedämmung darstellt, wird auf diese Weise mit einer einfachen Maßnahme eine Wärmeabstrahlung der Metallplatte 11 mit einer vom Wasserkern 5 abgewandte und somit unerwünschte Richtung weitgehend unterbunden.In contrast, the base plate 12 has the function of a rigid construction and a thermal insulation. In order to direct the vector of the heat transfer in the direction of the water core 5, the base plate 12 is advantageously provided on its surface 12a facing the underside 11a of the metal plate 11 with a layer reflecting heat rays, for example a chroming or aluminum foil. In addition, the base plate 12 has on its surface side 12a at one end a cutout 30 for the passage of the cable 7 and below each ceramic plate 13-18 recesses 31 and the central recess 32 for the printed circuit board 20. These recesses 31, 32 are such that after the form-fitting placement of the metal plate 11 on the base plate 12, all heat-conducting metal and ceramic parts 13-18; 20-23; 25-29 to the surface 12a of the base plate 12 have an air gap 33 (see FIG. 6) of at least 2 mm. Since air represents excellent thermal insulation due to its poor thermal conductivity, heat radiation of the metal plate 11 with a direction that is averted from the water core 5 and thus undesirable is largely prevented in this way with a simple measure.

Wie am anschaulichsten aus Fig. 6 entnommen werden kann, sind sowohl die biegesteife Metallplatte 11 als auch die Sockelplatte 12 an ihren Eckenbereichen abgerundet und bilden gemeinsam einen sehr flachen, plattenförmigen Kegelstumpf ohne jede Vorsprünge, der sich auch in eine flache Ausnehmung der Bettauflagerfläche 3a derart einsetzen läßt, daß die Oberfläche 11b der Metallplatte 11 zur Bettauflagerfläche 3a fluchtet.As can be seen most clearly from Fig. 6, both the rigid metal plate 11 and the base plate 12 are rounded at their corner areas and together form a very flat, plate-shaped truncated cone without any projections, which also fits into a flat recess in the bed support surface 3a can be used that the surface 11b of the metal plate 11 is aligned with the bed support surface 3a.

Mit der erfindungsgemäßen Heizungsvorrichtung 1 ist es möglich, auf der Oberseite 11b der Metallplatte 11 eine Temperatur zwischen 29 °C und 40 °C zu erzielen, die etwa auch der Temperatur an der Unterseite 11a der Metallplatte 11 entspricht. Mit diesem Temperaturbereich kann der Wasserkern 5 auf eine Hauttemperatur an der Oberfläche der Hülle 9 von 27 °C bis 36 °C aufgeheizt werden. An der Unterseite der Sockelplatte 12 ist dann gleichfalls eine Temperatur in demselben Bereich, nämlich zwischen 27 °C und 36 °C, vorhanden. Da somit die Temperatur an der Unterseite der Sockelplatte 12 gleich der Temperatur an der Oberfläche der Hülle 9 ist, werden zusätzliche Abstrahlungsverluste aufgrund einer erhöhten Temperaturdifferenz, wie bei den Widerstandsdrahtheizungen gemäß dem Stand der Technik, ausgeschlossen.With the heating device 1 according to the invention, it is possible to achieve a temperature between 29 ° C. and 40 ° C. on the top 11b of the metal plate 11, which temperature also corresponds approximately to the temperature on the bottom 11a of the metal plate 11. With this temperature range, the water core 5 can be heated to a skin temperature on the surface of the casing 9 from 27 ° C. to 36 ° C. A temperature in the same range, namely between 27 ° C. and 36 ° C., is then also present on the underside of the base plate 12. Since the temperature on the underside of the base plate 12 is thus equal to the temperature on the surface of the casing 9, additional radiation losses due to an increased temperature difference, as in the case of the resistance wire heaters according to the prior art, are excluded.

Bezugszeichenliste:Reference symbol list:

HeizungsvorrichtungHeater
11
WasserbettWaterbed
22nd
BettgestellBed frame
33rd
BettauflagerflächeBed support area
3a3a
SicherheitsfolieSecurity film
44th
WasserkernWater core
55
RegeleinrichtungControl device
66
LeitungskabelCable
77
NetzsteckerPower plug
88th
HülleCover
99
Abdeckungcover
1010th
MetallplatteMetal plate
1111
Unterseite der Metallplatte 11Underside of the metal plate 11
11a11a
Oberfläche der Metallplatte 11Surface of the metal plate 11
11b11b
SockelplatteBase plate
1212th
Oberflächenseite der Sockelplatte 12Surface side of the base plate 12
12a12a
KeramikplattenCeramic plates
13-1813-18
Klebstoffadhesive
1919th
PCB-LeiterplattePCB circuit board
2020th
StromleiterConductor
21, 2221, 22
WiderstandsleiterResistance ladder
2323
Ende der Metallplatte 11End of the metal plate 11
2424th
SicherungFuse
2525th
DrahtleiterWire conductor
26, 2726, 27
Relais, TriacRelay, triac
2828
NTC-SensorNTC sensor
2929
AussparungRecess
3030th
AusnehmungenRecesses
31, 3231, 32
LuftspaltAir gap
3333

Claims (12)

Heizungsvorrichtung mit elektrischen Widerstandsleitern für Wasserbetten, die zwischen einem Bettgestell und einer Sicherheitsfolie angeordnet und in Abhängigkeit von der gewünschten Temperatur eines auf der Sicherheitsfolie liegenden Wasserkerns regelbar ist, dadurch gekennzeichnet, daß sie mit eingebrannten, elektrischen Leitern (23) versehene Keramikplatten (13-18) aufweist, die mit einem Klebstoff (19) hoher Wärmeleitfähigkeit auf die Unterseite (11a) einer biegesteifen Metallplatte (11) geklebt sind, die unter Freilassung eines Luftspalts (33) für die Keramikplatten (13-18) formschlüssig auf eine Sockelplatte (12) schlechter Wärmeleitfähigkeit auf dem Bettgestell (3) aufgesetzt ist.Heating device with electrical resistance conductors for water beds, which is arranged between a bed frame and a safety film and can be regulated as a function of the desired temperature of a water core lying on the safety film, characterized in that it has ceramic plates (13-18.) Provided with burned-in electrical conductors (23) ) which are glued to the underside (11a) of a rigid metal plate (11) with an adhesive (19) of high thermal conductivity, which form-fitting onto a base plate (12) while leaving an air gap (33) for the ceramic plates (13-18) poor thermal conductivity is placed on the bed frame (3). Heizungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die elektrischen Leiter (23) aus einem pastösen Gemisch aus Partikeln von Edelmetallen, wie Gold, Silber oder Ruthenium sowie aus keramischen Bestandteilen, wie Glas und Aluminiumoxyden gebildet sind, welches bei etwa 900 °C in die Keramikplatten (13-18) zu einer hybriden Leiterschleife eingebrannt ist.Heating device according to claim 1, characterized in that the electrical conductors (23) are formed from a pasty mixture of particles of noble metals, such as gold, silver or ruthenium, and of ceramic components, such as glass and aluminum oxides, which at about 900 ° C in the Ceramic plates (13-18) is burned into a hybrid conductor loop. Heizungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Klebstoff (19) eine schlechte elektrische Leitfähigkeit, eine hohe Klebekraft und Flexibilität aufweist und aus einem Silikongemisch besteht.Heating device according to claim 1 or 2, characterized in that the adhesive (19) has poor electrical conductivity, high adhesive strength and flexibility and consists of a silicone mixture. Heizungsvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß mehrere, die biegesteife Metallplatte (11) gleichmäßig aufheizende Keramikplatten (13-18) in symmetrischer Anordnung auf deren Unterseite (11a) geklebt sind und die elektrischen Leiter (23) jeder Keramikplatte (13-18) über flexible, elektrische sowie mit Silikon isolierte Drahtleiter (26, 27) mit einer zwischen den Keramikplatten (13-18) angeordneten, mit gedruckten Stromleitern (21, 22) versehene PCB-Leiterplatte (Printed Circuit Board) (20) in Parallelschaltung verbunden ist.Heating device according to one of claims 1 to 3, characterized in that a plurality of ceramic plates (13-18), which heat the bending-resistant metal plate (11) uniformly, are glued in a symmetrical arrangement on the underside (11a) thereof and the electrical conductors (23) of each ceramic plate ( 13-18) via flexible, electrical and silicon-insulated wire conductors (26, 27) with a PCB circuit board (Printed Circuit Board) (20) arranged between the ceramic plates (13-18) and provided with printed current conductors (21, 22) is connected in parallel. Heizungsvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Stromleiter (21, 22) der Leiterplatte (20) über ein an einem Ende (24) an der Unterseite (11a) der biegesteifen Metallplatte (11) befestigtes flexibles Leitungskabel (7) sowie über eine per Hand zu betätigende Regeleinrichtung (6) über einen handelsüblichen Netzstecker (8) mit einer hausüblichen Spannungsquelle verbindbar sind.Heating device according to one of claims 1 to 4, characterized in that the current conductors (21, 22) of the printed circuit board (20) via a flexible cable (7) attached to one end (24) on the underside (11a) of the rigid metal plate (11) ) and a manually operated control device (6) can be connected to a standard power source using a standard mains plug (8). Heizungsvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß am Eingang des Leitungskabels (7) in die elektrische Leiterplatte (20) eine Sicherung (25) vorgesehen ist, die bei zu hoher Temperatur der Unterseite (11a) der Metallplatte (11) oder bei zu hoher Spannung den Stromkreis (7, 21, 22, 23, 26, 27) zwischen dem Leitungskabel (7) und den Stromleitern (21, 22) der Leiterplatte (20) unterbricht.Heating device according to one of claims 1 to 5, characterized in that a fuse (25) is provided at the entrance of the line cable (7) into the electrical circuit board (20) which, if the underside (11a) of the metal plate (11) is too hot, or if the voltage is too high, the circuit (7, 21, 22, 23, 26, 27) between the line cable (7) and the current conductors (21, 22) of the printed circuit board (20) is interrupted. Heizungsvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Stromleiter (21, 22) der Leiterplatte (20) mit einem Relais in Form eines Triacs (28) verbunden sind, welches gleichfalls an der Unterseite (11a) der Metallplatte (11) befestigt ist und mit der Regeleinrichtung (6) in Verbindung steht.Heating device according to one of claims 1 to 6, characterized in that the current conductors (21, 22) of the printed circuit board (20) are connected to a relay in the form of a triac (28) which is also on the underside (11a) of the metal plate (11 ) is attached and is connected to the control device (6). Heizungsvorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß an der Unterseite (11a) der biegesteifen Metallplatte (11) ein NTC-Sensor (Negative Temperature Coefficient-Sensor) (29) angeordnet ist, der gleichfalls mit der Regeleinrichtung (6) verbunden ist.Heating device according to one of Claims 1 to 7, characterized in that an NTC sensor (Negative Temperature Coefficient Sensor) (29) is arranged on the underside (11a) of the rigid metal plate (11), which is also connected to the control device (6) connected is. Heizungsvorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die biegesteife Metallplatte (11) aus einer Aluminiumlegierung hoher Wärmeleitfähigkeit und die gleichfalls biegesteif ausgebildete Sockelplatte (12) aus einem warmfesten Kunststoff, wie ABS, Polyurethan, Polyamid oder Polyethylen, schlechter Wärmeleitfähigkeit besteht.Heating device according to one of claims 1 to 8, characterized in that the rigid metal plate (11) consists of an aluminum alloy with high thermal conductivity and the likewise rigid base plate (12) consists of a heat-resistant plastic such as ABS, polyurethane, polyamide or polyethylene, poor thermal conductivity . Heizungsvorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Sockelplatte (12) an einem Ende mit einer Aussparung (30) zur Durchführung des elektrischen Leitungskabels (7) und unterhalb einer jeden Keramikplatte (13-18) sowie unterhalb der Leiterplatte (20) mit Ausnehmungen (31, 32) für diese Teile mit einer Tiefe versehen ist, daß nach dem formschlüssigen Aufsetzen der Metallplatte (11) sämtliche wärmeleitenden Metall- und Keramikteile (13-18; 21-23; 25-29) zur Sockelplatte (12) einen Luftspalt (33) von mindestens 2 mm aufweisen.Heating device according to one of claims 1 to 9, characterized in that the base plate (12) at one end with a recess (30) for the passage of the electrical cable (7) and below each ceramic plate (13-18) and below the circuit board ( 20) is provided with recesses (31, 32) for these parts with a depth such that after the form-fitting attachment of the metal plate (11) all heat-conducting metal and ceramic parts (13-18; 21-23; 25-29) to the base plate ( 12) have an air gap (33) of at least 2 mm. Heizungsvorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Sockelplatte (12) an ihrer der Unterseite (11a) der Metallplatte (11) zugekehrten Fläche (12a) mit einer Wärmestrahlen reflektierenden Schicht versehen ist.Heating device according to one of claims 1 to 10, characterized in that the base plate (12) is provided on its surface (12a) facing the underside (11a) of the metal plate (11) with a layer reflecting heat rays. Heizungsvorrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß sowohl die biegesteife Metallplatte (11) als auch die Sockelplatte (12) an ihren Eckenbereichen abgerundet sind und gemeinsam einen sehr flachen plattenförmigen Kegelstumpf ohne vorspringende Bereiche bilden.Heating device according to one of claims 1 to 11, characterized in that both the rigid metal plate (11) and the base plate (12) are rounded at their corner areas and together form a very flat plate-shaped truncated cone without projecting areas.
EP96103374A 1995-03-09 1996-03-05 Heating device for waterbeds Expired - Lifetime EP0731624B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19508315 1995-03-09
DE19508315A DE19508315C1 (en) 1995-03-09 1995-03-09 Heating unit for water beds

Publications (3)

Publication Number Publication Date
EP0731624A2 true EP0731624A2 (en) 1996-09-11
EP0731624A3 EP0731624A3 (en) 1996-12-11
EP0731624B1 EP0731624B1 (en) 2000-01-19

Family

ID=7756094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103374A Expired - Lifetime EP0731624B1 (en) 1995-03-09 1996-03-05 Heating device for waterbeds

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US (1) US5811760A (en)
EP (1) EP0731624B1 (en)
AT (1) ATE189095T1 (en)
CA (1) CA2171410A1 (en)
DE (1) DE19508315C1 (en)
NL (1) NL1002575C2 (en)

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US6124578A (en) * 1999-09-14 2000-09-26 Elliot; Russell R. Warmer for feet, neck, and lower back
KR20030013227A (en) * 2001-09-08 2003-02-14 문일호 The foundation equipment of an water mettress
DE102006026113B4 (en) * 2006-06-01 2014-10-30 Oliver Kiefl Device for individual heat utilization of hot water heating systems
DE202013003828U1 (en) 2013-04-23 2013-05-14 Sbi Polska Sp. Z O.O. Waterbed heating with remote control
DE202014003827U1 (en) * 2014-05-08 2015-08-12 I.G. Bauerhin Gmbh Heating device with a temperature detection associated therewith for heating surfaces in the interior of a vehicle
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US20220347008A1 (en) * 2019-07-01 2022-11-03 Georgetown University Portable folding infant radiant warmer

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Also Published As

Publication number Publication date
CA2171410A1 (en) 1996-09-10
US5811760A (en) 1998-09-22
NL1002575A1 (en) 1996-09-11
EP0731624B1 (en) 2000-01-19
ATE189095T1 (en) 2000-02-15
DE19508315C1 (en) 1996-05-09
EP0731624A3 (en) 1996-12-11
NL1002575C2 (en) 1998-04-07

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