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
  • H05B6/00—Heating by electric, magnetic or electromagnetic fields
  • H05B6/02—Induction heating
  • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
  • H05B6/12—Cooking devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
  • F24C7/00—Stoves or ranges heated by electric energy
  • F24C7/08—Arrangement or mounting of control or safety devices
  • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
• • 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
  • H05B6/00—Heating by electric, magnetic or electromagnetic fields
  • H05B6/02—Induction heating
  • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
  • H05B6/12—Cooking devices
  • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them

Definitions

• the invention is based on a domestic appliance device with a pane of an at least partially transparent material according to the preamble of claim 1 and a method for producing such a pane according to the preamble of claim 14.
• various devices with at least partially transparent panes are known. Examples include oven panes and cooktops of radiant panels or induction cooktops.
• the transparent material may be, for example, a glass or a glass ceramic and partially printed. Furthermore, it is known to print such transparent materials in partial areas with markings, for example in order to visualize heating zones of a hob or to achieve a typical appearance for the manufacturer.
• induction hobs mainly crystal glass is used for the cooking surface because of the low electrical conductivity, low thermal expansion, high temperature resistance and excellent optical properties.
• the invention is in particular the object of providing generic household appliance devices in a visually appealing way with an additional signal function.
• the invention is based, in particular, on a household appliance device with a pane made of an at least partially transparent material, comprising a front or top side accessible to a user.
• a portion of the disc below the front or top is provided with luminescent material.
• the luminescent material can be excited to illuminate in a manner which appears reasonable to the person skilled in the art and depending on the specific type of household appliance device, so that the pane can be equipped with an additional signal function.
• luminescent materials are paramagnetic ions such as 4f ions (rare earths such as Pr 3+ , Er 3+ , Nd 3+, etc.) and 3d-ions (transition heavy metals such as Mn 2+ , Cr 3+ , Ni 2+, etc.).
• 4f ions rare earths such as Pr 3+ , Er 3+ , Nd 3+, etc.
• 3d-ions transition heavy metals such as Mn 2+ , Cr 3+ , Ni 2+, etc.
• the invention proposes to introduce the luminescent material only in a partial region of the disc.
• a special effective signal function can be achieved by which differentiated information can be transmitted.
• a subarea should always be defined as a real subarea that does not encompass the entire disc.
• the luminescent material is introduced into the transparent material. Thereby, a secure confinement of the luminescent material can be ensured, which on the one hand damage the luminescent material by scratches or the like, and on the other hand, the luminescent material does not escape.
• the transparent material is a glass or glass ceramic material, for example, sold under the trade name "Ceran" material.
• the luminescent material can be introduced in a particularly simple manner into a sharply demarcated part region if the luminescent material is printed on one of the front or top side opposite back or bottom side of the disc.
• a screen printing technique can be used to print the luminescent material.
• Rear or bottom is arranged, it is on the one hand protected against access by the user from the front or top and on the other hand can be easily and selectively introduced into certain, sharply defined subregions. Furthermore, electromagnetic radiation for exciting the luminescence from the underside can be radiated, so that attenuation of the radiation by absorption in the transparent material can be minimized by a short path which the radiation has to cover in the transparent material to a minimum.
• Material comprises luminescent ions which are introduced by a laser insertion process in the transparent material.
• the portion that is provided with the luminescent material can be flexibly adapted to the needs of the specific application, so that by means of the additional signal function of the disc clearly defined information can be transmitted, for example, a residual heat treatment, a Schuzonenausfall or similar transport.
• the luminescent material can be introduced into recesses in the rear or underside of the disc.
• the recesses may be formed, for example, as in particular microscopic blind holes, which are e.g. with a laser drilling or
• the luminescent material can be sealed against environmental influences if the recesses filled with the luminescent material are sealed with a protective layer.
• the luminescent material contains rare earth ions with valence electrons in a 4f-orbital. Such ions exhibit the property that multiple infrared photons can be converted to a visible photon. This phenomenon is known as "up-conversion" and can be used, for example, in hobs with radiant heaters.
• Conspicuity of the heated heating zone can be significantly increased, so a heat heating can be made more effective.
• Light emitting diode for exciting the luminescence of the luminescent material includes.
• the light-emitting diode emits ultraviolet radiation
• the radiation exciting the luminescence can remain invisible, which leads to a particularly clear appearance of the luminescent subregion and thus improves the signal effect.
• the light-emitting diode can be actuated for example by a control unit.
• the domestic appliance device comprises a control unit and a temperature sensor associated with the partial area, wherein the control unit operates the light-emitting diode depending on a signal of the temperature sensor, an effective residual heat heating can be achieved.
• the invention relates to a method for producing a pane of an at least partially transparent material for a domestic appliance device, wherein the pane comprises a front or top accessible to a user.
• luminescent material be introduced into the transparent material in a partial area below the front or top of the disk.
• a powder with oxides of luminescent ions is applied to the back of the pane in the partial area and then the area is locally heated with a laser in order to diffuse the luminescent ions into the transparent material.
• a clearly defined subarea with luminescent material can be coded in an industrially applicable, simple manner.
• the holes are made in the transparent material and the lumi- neszente material is introduced into the holes.
• the holes are closed after introduction of the luminescent material with a protective layer.
• the holes can be made in a flexibly configurable manner and very precisely in the back of the disk when done with a laser.
• FIG. 1 shows a household appliance device in the form of a glass ceramic hob with a pane of transparent glass-ceramic material in a cutout
• FIG. 2 shows a domestic appliance device with a pane according to a first alternative embodiment of the invention, in which the luminescent material is introduced into the transparent material in a laser deposition process
• FIG. 2 shows a domestic appliance device with a pane according to a first alternative embodiment of the invention, in which the luminescent material is introduced into the transparent material in a laser deposition process
• Fig. 3 shows a household appliance device according to a further alternative embodiment of the invention, in which the luminescent material is introduced into recesses in a back in the disc.
• FIG. 1 shows a domestic appliance device designed as an induction glass-ceramic cooktop with a pane 10 of transparent glass ceramic material in a cutout.
• the disc 10 covers a cooktop which comprises four heating zones, under each of which induction heating elements, not shown here, are arranged are.
• the disk 10 shown in Figure 1 can also be used to cover radiant heaters.
• cooking pots or pans can be placed in operation, which can be heated by means of the induction heaters.
• NTC element temperature sensor 16 On one of the upper side 12 opposite underside 14 designed as NTC element temperature sensor 16 is arranged, which serves to regulate the operation of the induction heater.
• the temperature sensor 16 is arranged in the center of an annular portion 18 of the disc 10 which is provided with luminescent material 20.
• the luminescent material 20 is printed on the underside 14 of the disc 10 in a screen printing process.
• the luminescent material 20 contains rare earth ions with valence electrons in a 4f-orbital, Er 3+ ions. He 3+ ions have a variety of possible optical transitions in their basic configuration. When Er 3+ ions are excited by ultraviolet light having a wavelength of about 400 nm, the ions from the ground state are excited into excited states and then a spontaneous emission of green light having a wavelength of 530 nm is generated.
• a light emitting diode 22 is arranged, which emits ultraviolet light.
• the ultraviolet light is coupled into the side surfaces of the pane 10 formed of glass or glass ceramic material and passed through total reflection at the upper side 12 and at the lower side 14 into the partial area 18 equipped with luminescent material 20.
• the Er 3+ ions absorb the ultraviolet light of the light emitting diode 22 and emit green light having the wavelength of 530 nm, and the portion 18 emits green light when the light emitting diode 22 is turned on.
• the portion 18 has other shapes such as lines, letters or the like.
• the light emitting diode 22 is operated by a control unit 24, which also reads out a signal of the temperature sensor 16.
• the control unit 24 switches on the light-emitting diode 22 whenever the temperature detected by the temperature sensor 16 is above a threshold value, for example 50 or 60 ° C.
• FIGs 2 and 3 show alternative embodiments of the invention, wherein analog or identically acting features are provided with the same reference numerals. The following description is limited to differences from the embodiment shown in Figure 1, while reference is made to the description of Figure 1 with regard to the same features.
• the luminescent material 20 is introduced in each case into the transparent material by various methods into a region of the disc 10 which adjoins the underside 14 directly.
• the luminescent material 20 is introduced into the transparent material by means of a laser insertion method.
• a powder with 4f ions is applied to the underside 14 of the disk 10.
• the desired portion 18 is strongly heated with a laser.
• the ions of the luminescent material 20 burn into the glass-ceramic material of the pane 10 or the ions diffuse under the surface of the underside 14 of the glass-ceramic material.
• the remaining luminescent material 20 is removed, so that only in the selected and treated with the laser portion 18 luminescent material 20 immediately below the surface of the bottom 14 remains.
• Figure 3 shows a further alternative embodiment of the invention, in which with a laser, a grid or grid of small, formed as blind holes recesses 26 are incorporated in the bottom 14 of the disc 10. Subsequently, the recesses 26 were filled with the luminescent material 20 and the recesses 26 filled with the luminescent material 20 were sealed with a protective layer 28 of glass.
• the invention is not limited to the improvement of cover plates of hobs, but can also be applied in other household appliances.
• the use in an oven window is conceivable.
• different portions of the slices may be provided with various luminescent materials that may, for example, illuminate in different colors and / or that may be excited in a different manner to selectively provide different optical signals.
• Pr 3+ ions can be used which are converted by ultraviolet light
• Emission of yellow light from 580 to 590 nm wavelength can be excited.
• 5f ions such as Ce 3+ , which excite ultraviolet light to largely emit white light in a wide spectral range can also be used.
• Alternative 4f ions are Dy 3+, Tm 3+, Eu 3+, Ho 3+ and Oxidzu- sammen deren such ions such as Er 2 O "3, Pr 2 O" 3 etc. More luminescent
• Quant dots such as AIAs, GaAs and others. Such materials are particularly useful in connection with the embodiment of the invention shown in Figure 3, are incorporated in the small recesses 26 in the back of the disc 10.
• the ultraviolet light may be radiated onto the subregion 18 from the underside 14.
• the luminescent material 20 has been deposited just below the bottom surface 14, even with a strong attenuation of the ultraviolet light in the transparent material, it can be ensured that a large part of the ultraviolet light reaches the luminescent material 20.
• the glass ceramic pane according to the invention can also exert a signal function without external illumination solely by thermoluminescence, so that infrared photons of a heat source can excite the luminescent material 20 for luminescence.
• the luminescent material 20 suppression of 4 f -luminescence by the temperature can be used.
• the luminescence disappears at a temperature above about 160 ° C.
• the luminescent material 20 is applied to an inner side of an oven pane, it can be concluded from the fact that the luminescence disappears that, for example, preheating the Oven is finished.

Landscapes

• Electromagnetism (AREA)
• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Induction Heating Cooking Devices (AREA)
• Surface Treatment Of Glass (AREA)
• Electric Stoves And Ranges (AREA)
• Baking, Grill, Roasting (AREA)
• Finishing Walls (AREA)
• Panels For Use In Building Construction (AREA)
• Glass Compositions (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=39876010

Family Applications (1)

Country Status (3)

Cited By (10)

Citations (1)

Family Cites Families (6)

• 2007
  • 2007-04-19 ES ES200701158A patent/ES2322006B1/es active Active
• 2008
  • 2008-04-10 WO PCT/EP2008/054318 patent/WO2008128900A2/de active Application Filing
  • 2008-04-10 EP EP08736040.0A patent/EP2191201B1/de active Active

Patent Citations (1)

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