WO2012085821A1

WO2012085821A1 - Domestic appliance device

Info

Publication number: WO2012085821A1
Application number: PCT/IB2011/055782
Authority: WO
Inventors: Miguel Angel BUÑUEL MAGDALENA; Diego Cuartielles Ruiz; Francisco Javier Ester Sola; Jose-Ramon Garcia Jimenez; Pilar Perez Cabeza; Fernando Planas Layunta
Original assignee: BSH Bosch und Siemens Hausgeräte GmbH
Priority date: 2010-12-23
Filing date: 2011-12-19
Publication date: 2012-06-28
Also published as: ES2385152A1

Abstract

The invention relates to a domestic appliance device, in particular a hob device, comprising a glass unit (12) and at least one coating (14, 16), which is arranged on at least one portion (18, 19, 20, 21, 22) of a back face (29) of the glass unit (12). In order to achieve shielding of thermal radiation and thus energy savings, according to the invention, the glass unit (12) is designed as a borosilicate glass unit (28).

Description

Home appliance device

The invention relates to a household appliance device according to the preamble of claim 1.

Domestic appliance devices, in particular hob devices, in various configurations are known from the prior art. In particular, from DE 100 14 373 C2 a hob plate is known, the glass unit is made of glass ceramic. At an underside of the hob plate, in particular, this has a permeable to infrared radiation coating, which is designed as a decorative element.

The object of the invention is in particular to provide a generic device with improved properties in terms of heat radiation shielding and energy conservation. The object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.

The invention relates to a domestic appliance device, in particular a hob device, with a glass unit and with at least one coating, which is arranged on at least a partial region of a rear side of the glass unit.

It is proposed that the glass unit is formed as a borosilicate glass unit.

A "coating" is to be understood as meaning, in particular, a layer of a material applied to a base material, In particular, the material of the coating differs from the base material, a "partial area" being understood to mean at least one contiguous area. the one bounded by at least one closed line. The "backside" of the glass unit is to be understood as meaning, in particular, a side of the glass unit which differs from one side of the glass unit which is directly accessible to an operator of the household appliance device. Borosilicate glass unit "should be understood in particular a glass unit, which is formed from borosilicate glass. Borosilicate glass preferably has a boron mass fraction of 2 - 5%. Preferably, borosilicate glass includes 4-8% alkali metal oxides, such as sodium oxide and / or potassium oxide, 2-1% alumina, 0-5% alkaline earth metal oxides, 70-80% silica, and

7 - 13% boron trioxide. The borosilicate glass unit is particularly preferably used in a hob plate. Further fields of application of borosilicate glass are found in preferably transparent components of household appliances. Household appliance doors, in particular, would also be suitable for such an application.

Through the use of borosilicate glass, in particular a heat radiation shielding and an energy saving can be achieved. In particular, borosilicate glass has a lower transparency for infrared radiation than glass ceramic. When using the glass unit as a cooktop panel for an induction cooker, the plate heated by a cooking plate on the cooking hob can be reduced in a space below the cooktop radiated heat. In particular, in the space below the hob plate arranged electronic components can be protected from overheating. The radiated heat, rather than penetrating the glass unit, is at least partially absorbed in the glass unit. The resulting heating of the glass unit below the cookware allows a low heat dissipation from the cooking vessel. Borosilicate glass also allows more planar surfaces than glass-ceramic, which in particular a simpler and more thorough cleaning of the top is made possible. Likewise, this allows a precise

Applying thin layers. Because borosilicate glass is usually transparent, leads, can be improved by a coloring coating depth perception of an operator, so that a high level of comfort is achievable.

It is also proposed that the borosilicate glass unit is formed from hardened, preferably thermally hardened, borosilicate glass. Under "hardened"

Borosilicate glass should be understood in particular borosilicate glass, which was rapidly cooled after heating to a high temperature, in particular a temperature between 550 ° C and 650 ° C, preferably a temperature between 585 ° C and 615 ° C, near the melting point of the glass. In the glass arise by application of this method compressive stresses between 24

MPa and 69 MPa and / or edge stresses between 38 MPa and 67 MPa. In particular, hardened borosilicate glass differs from annealed borosilicate glass which has a compressive stress greater than 69 MPa and / or an edge stress greater than 67 MPa. As a result, a particularly safe, in particular unbreakable construction can be achieved.

In a further embodiment of the invention, at least part of the coating is applied by a PVD process. A "PVD process", a process for physical vapor deposition, should in particular be understood as meaning a process in which a starting material is converted into a gas phase and then deposited on a carrier material Advantageously, the PVD process is a magnetron sputtering process, magnetron sputtering produces a plasma whose accelerated particles eject individual atoms and / or atomic assemblies, so-called clusters, from the starting material These ejected atoms and / or clusters can then be deposited on the carrier material, In particular, a flexible and simple production process can be ensured by using a PVD process, in particular a high degree of flexibility with regard to a thickness and a material

Coating. Preferably, the coating is formed as a multilayer structure. In particular, a thickness of the thinnest layer is greater than 10% of a thickness of the thickest layer, depending on a layer thickness and a material of the individual layers As a result, in particular a good flexibility with regard to an achievable effect of an infrared opacity and / or a coloration can be achieved.

Furthermore, it is proposed that at least one layer of the multilayer structure, which is formed from a metallic compound, adjoins at least one other layer of the multilayer structure, which is formed from an insulating compound. In particular, layers of metallic compounds and insulating compounds alternate within the multilayer structure. Under one

"Metallic compound" is to be understood in particular a compound having a specific electrical conductivity greater than 10 ^"8 S / m, advantageously greater than 10 ^{" 4} S / m, particularly advantageously greater than 1 S / m and preferably greater than 100 S / Preferably, this compound contains at least one of the substances stainless steel, molybdenum, nickel, chromium, niobium, vanadium, titanium,

Tantalum, silicon, aluminum, copper and / or an alloy of these substances. An "insulating compound" is to be understood as meaning in particular a compound which differs from a metallic compound, preferably this compound comprises at least one of tin oxide, zinc oxide, titanium oxide, aluminum oxide, silicon oxide, niobium oxide, tantalum oxide, silicon nitride, aluminum nitride, titanium nitride In particular, 0 to 4 insulating layers and 1 to 3 metallic layers are provided, which in particular affords good flexibility with regard to an achievable effect of the infrared opaqueness and / or coloration In particular, a metallic-looking coloration the coating can be achieved. In a further embodiment of the invention, it is proposed that at least one layer of the multilayer structure has a layer thickness between 2 nm and 200 nm, advantageously between 2 nm and 100 nm and preferably between 2 nm and 50 nm and / or that a thickness of the coating is smaller than 500 nm and preferably less than 300 nm

Flexibility can be achieved with regard to an achievable effect of the infrared opacity and / or coloring. In addition, a low attenuation of the used induction heating elements and thus an energy saving can be achieved.

Advantageously, the invention has at least one display means. A "display means" should be understood as meaning, in particular, a means which is provided for visualization of parameters of the domestic appliance, In particular, a position of a cooking zone can be displayed by serigraphy on a front side and / or the rear side of the glass unit For this purpose, a display can be achieved by means of an LED arrangement and / or a laser marking on the rear side, front side and / or inside the glass unit, as well as other display means which appear suitable for the person skilled in the art Preferably arrangement of the display means on the back of the

Glass unit can be achieved a high durability of the display means.

It is also proposed that the partial area is designed as a décor. A "décor" is understood to mean a subarea whose form serves a visual task, in particular, it can be used to visualize the position of the object

Cooking zones are provided. As a result, a high level of comfort can be achieved.

In a further embodiment of the invention, a protective coating is proposed which covers at least the coating. A protective coating should in particular be understood as meaning a coating which preferably serves to protect the coating by high hardness and / or scratch resistance. Also can through the protective coating an air seal the coating can be achieved, whereby degeneration, in particular oxidation of the materials used can be prevented. The protective coating is designed in particular as a coating, ceramic coating and / or polymer coating. It can be applied by any method which appears suitable to a person skilled in the art in a thickness of preferably 100 μm to 1000 μm. As a result, a long shelf life of the coating can be achieved.

Further advantages emerge from the following description of the drawing. In the drawing, an embodiment of the invention is shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Show it:

Fig. 1 is a schematic representation of a domestic appliance in a

View from above and

2 shows a section along the line II-II in Figure 1.

Figure 1 shows a domestic appliance with a domestic appliance device, namely a hob with a hob device, in a view from above. The hob device has a glass unit 12 with two coatings 14 and 16, which are arranged on five partial areas 18, 19, 20, 21 and 22 of a rear side 29 of the glass unit 12. The glass unit 12 forms a cooking plate with four cooking zones 23, 24, 25 and 26. On the glass unit 12 garnishes for food preparation are positioned. In a horizontal installation position of the hob plate, the back 29 of the glass unit 12 is a bottom of the glass unit 12. Below the hob plate heating elements are arranged in the cooking zones 23, 24, 25 and 26. The heating elements are designed as induction heating elements. The glass unit 12 is formed as a borosilicate glass unit 28. The borosilicate glass unit 28 is formed of hardened borosilicate glass. The coating 14 is arranged on the subregions 18, 19, 21 and 22. The sub-divisions che 18, 19, 21, 22 are formed as decors 70, 72, 74, 76. The partial areas 18, 19, 21, 22 are formed by the surfaces of the cooking zones 23, 24, 25 and 26. The coating 16 is arranged on the subregion 20, which is disjoint with the subregions 18, 19, 21, 22 and has a further four recesses. The coatings 14 and 16 have a different coloration, which serves to visualize the cooking zones 23, 24, 25 and 26. Under the recesses four display means 52, 53, 54 and 55 are arranged. These display means 52, 53, 54, 55 are formed as LEDs, which are provided to display active cooking zones 23, 24, 25 and 26. In alternative embodiments, which are not further described here, a partial area may cover a surface that extends over the entire rear side 29 of the glass unit 12. Coatings 14 and 16 were applied by a PVD method. The PVD method is a magnetron sputtering method. The coatings 14 and 16 are formed as multilayer structures 30 and 32. A section II-II through the cooking plate at an edge of the cooking zone 23 is shown in FIG

2 shown. Layer thickness ratios are falsified. The multilayer structures 30 and 32 each consist of 5 layers 38, 34, 39, 35, 40 and 41, 36, 42, 37, 43. The layers 34 and 35 of the multilayer structure 30 are formed from metallic compounds and adjoin layers 38, 39 and 40 of the multilayer structure 30 formed of insulating compounds.

The layers 36 and 37 of the multilayer structure 32 are formed of metallic compounds and adjoin layers 41, 42 and 43 of the multilayer structure 32, which are formed of insulating compounds. The first and fifth layers 38 and 40, and 41 and 43 serve primarily to protect the metallic layers 34 and 35, or 36 and 37, from heat-induced oxidation.

The layer 38 of the multilayer structure 30 is directly adjacent to the glass unit 12. It consists of 78 nm tin oxide. This is followed by the layer 34 of 18 nm stainless steel. Adjacent to this layer 38 of 78 nm tin oxide. The following layer 35 consists of 26 nm stainless steel. The last layer 40 of the multilayer structure 30 is formed from tin oxide with a layer thickness 44 of 50 nm. This multi-layered structure

30 leads to a metallic blue coloration of the coating 14. A layer 41 of the multilayer structure 32 directly adjoins the glass unit 12. It consists of 100 nm tin oxide. This is followed by the layer 36 of 14 nm stainless steel. At this borders the layer 42 of 78 nm tin oxide. The following layer 37 consists of 35 nm stainless steel. The last layer 43 of the multilayer structure 32 is formed from tin oxide with a layer thickness 46 of 50 nm. This multilayer structure 32 leads to a metallic green coloration of the coating 16. In alternative embodiments, not shown here, a layer sequence of 17 nm tin oxide, 33 nm copper, 66 nm tin oxide, 25 nm stainless steel and 50 nm tin oxide leads to a metallic red coloration. A layer sequence of 29 nm tin oxide, 45 nm aluminum silicide, 41 nm tin oxide, 22 nm stainless steel and 50 nm tin oxide leads to a metallic yellow color. A metallic black color is achieved by a layer sequence of 46 nm tin oxide, 8 nm stainless steel, 56 nm tin oxide, 33 nm stainless steel and 50 nm tin oxide. Also, there may be embodiments in which the coatings 14 and 16 have the same structure. The coatings 14 and 16 thus each have a thickness 48 or 50 which is smaller than 500 nm. In an intermediate region 68 between the partial regions 18 and 20, a display means 56 designed as a serigraphy is arranged on the rear side 29 of the glass unit 12. This display means 56 is intended to visualize a position of the cooking zone 23. In alternative embodiments, indicated here by dashed lines, the serigraphy can be supplemented or replaced by further display means 57, 58 formed as a serigraph on the rear side 29 of the glass unit 12 and / or by means of a laser mark indicating means 59, 60, 61 within the glass unit 12 and / or by means of serigraphy and / or laser marking formed display means 62, 63, 64 on the front side, ie the side facing away from the rear side 29 of the glass unit 12. Furthermore, when the display means 56 is omitted, the two coatings 14 and 16 directly adjoin one another. The coatings 14 and 16 and the display means 56, 57 and 58 are covered by a protective coating 66.

reference numeral

12 glass unit 44 layer thickness

14 coating 46 layer thickness

16 coating 48 thickness

18 section 50 thickness

19 sub-area 52 display means

20 subarea 53 display means

21 partial area 54 display means

22 subarea 55 display means

23 Cooking zone 56 Display means

24 cooking zone 57 display means

25 cooking zone 58 display means

26 cooking zone 59 display means

28 borosilicate glass unit 60 display means

29 Rear 61 Display means

30 multilayer structure 62 display means 32 multilayer structure 63 display means

34 layer 64 display means

35 layer 66 protective coating

36 layer 68 intermediate area

37 layer 70 decor

38 layer 72 decor

39 layer 74 decor

40 layer 76 decor

41 shift

42 shift

43 shift

Claims

claims

1. Household appliance device, in particular hob device, with a glass unit (12) and with at least one coating (14, 16) on at least a portion (18, 19, 20, 21, 22) of a rear side (29) of the glass unit (12) is arranged, characterized in that the glass unit (12) as a borosilicate glass unit (28) is formed.

2. Home appliance device according to claim 1, characterized in that the

Borosilicate glass unit (28) is formed of hardened borosilicate glass.

3. Domestic appliance device according to one of the preceding claims, characterized in that at least a part of the coating (14, 16) is applied by a PVD method.

4. Domestic appliance device according to one of the preceding claims, characterized in that the coating (14, 16) as a multilayer structure (30, 32) is formed.

5. Domestic appliance device according to claim 4, characterized in that at least one layer (34, 35, 36, 37) of the multilayer structure (30, 32), which is formed from a metallic compound, at least one other layer (38, 39, 40 , 41, 42, 43) of the multilayer structure (30, 32) formed of an insulating compound.

6. Domestic appliance device according to claim 5, characterized in that at least one layer (34, 35, 36, 37, 38, 39, 40, 41, 42, 43) of the multilayer structure (30, 32) has a layer thickness (44, 46) between 2 nm and 200 nm.

7. Domestic appliance device according to one of the preceding claims, characterized in that a thickness (48, 50) of the coating is smaller than 500 nm. Home appliance device according to one of the preceding claims, characterized by at least one display means (52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64).

Domestic appliance device according to one of the preceding claims, characterized in that the partial region (18, 19, 20, 21, 22) as a decor (70, 72, 74, 76) is formed.

Domestic appliance device according to one of the preceding claims, characterized by a protective coating (66) which covers at least the coating (14, 16).

Domestic appliance with a domestic appliance device according to one of the preceding claims.

A method intended to manufacture a home appliance device according to any one of claims 1-10.

A method according to claim 12, characterized in that in at least one method step, a PVD technique is used.