Improved part of gas burner

Abstract

A component (10) of a gas burner (2) or an article placed above and / or near a gas burner (2), characterized in that said component (10) and / or article comprises a core of molten silica glass and at least one coating comprising an electrically conductive material.

Description

Technical Field

[0001] The invention relates to parts of a gas burner, such as a cover for a gas burner, and / or to articles for a gas burner, in particular articles to be placed above and / or near a gas burner, such as a pan support or other cooking vessel.

[0002] The invention also relates to a method for producing a component for a gas burner and / or an article to be placed above and / or near a gas burner. Background Art

[0003] Known burners generally comprise an injector support, a base located on the injector support and a cover (also called a "cover" or "cap") located on the base, the cover and the base together defining a chamber for mixing and distributing the air-gas mixture.

[0004] The injector bracket is usually made of die-cast aluminum and is provided with means for fastening it to an iron frame; in addition, one or more injectors are mounted on the injector bracket, which can be aligned vertically or horizontally and are fluidly connected to one or more gas supply inlets.

[0005] Furthermore, the base is usually made of die-cast aluminum and is usually provided with one or more ducts for conveying the air-gas mixture to a corresponding distribution chamber which is closed at the top by a cover.

[0006] On the outer edge of the base, a plurality of primary and / or secondary doors are obtained for generating a set of flames suitable for heating a cooking vessel placed above the burner itself. In fact, the base can also act as a flame spreader.

[0007] In some known solutions, the base is made of brass.

[0008] The cover is usually formed as a moulded part, particularly made of cast iron, which has an enamel coating to facilitate cleaning.

[0009] In some known solutions, the cover is made of brass or is stamped from sheet metal, for example from aluminum.

[0010] The above-mentioned known materials for manufacturing gas burner components, in particular the materials for manufacturing the cover, have high performance in terms of thermal stress and thermal shock resistance. In more detail, corresponding to the flame, it is necessary to maintain a temperature stability of about 800°C.

[0011] The material also has a certain mechanical stability and tolerance, as well as a certain electrical conductivity to generate a spark to ignite the gas flame.

[0012] Furthermore, the materials need to be washable and even suitable for cleaning in the dishwasher.

[0013] Even though they are highly valued, the known components of gas burners, in particular the covers made of cast iron with an enamel coating, have limited design options.

[0014] Some known alternative materials for producing covers for gas burners are glass ceramics, such as LAS (lithium aluminosilicate) ceramics, which have a rather high heat resistance, or ceramics based on cordierite, for example.

[0015] However, LAS glass-ceramics contain lithium, an element that is now used on a large scale in electric vehicles or their batteries.

[0016] WO 2014 / 027270 discloses an in vitro ceramic burner and / or pot support which is easy to clean and correspondingly aesthetically pleasing. Summary of the invention

[0017] Purpose of the Invention

[0018] The object of the present invention is to propose a component for a gas burner or an item to be placed above and / or near a gas burner which at least partially overcomes the disadvantages of conventional solutions.

[0019] Another object of the invention is to propose a component of a gas burner or an article to be placed above and / or near a gas burner which is easier to produce.

[0020] Another object of the present invention is to provide a gas burner component or an article to be placed above and / or near a low-cost gas burner.

[0021] Another object of the invention is to propose a component of a gas burner or an article to be placed above and / or near a gas burner which allows an increased degree of freedom in design.

[0022] Another object of the present invention is to propose a component of a gas burner or an article to be placed above and / or near a gas burner which has good and appropriate electrical characteristics, in particular for generating a spark to ignite a gas flame.

[0023] Another object of the invention is to propose a component of a gas burner or an article placed above and / or near a gas burner which has a "controlled" breakage, ie does not break into a plurality of small pieces.

[0024] Another object of the present invention is to propose a component of a gas burner or an article to be placed above and / or near a gas burner, which is more environmentally friendly to produce.

[0025] Another object of the invention is to propose a component for a gas burner or an article to be placed above and / or near a lighter gas burner.

[0026] Another object of the present invention is to provide a component of a gas burner that remains cooler when the flame is generated.

[0027] Another object of the present invention is to provide an article placed above and / or near a gas burner that remains cooler when the flame is generated.

[0028] Another object of the present invention is to propose a component of a gas burner or an article placed above and / or near a gas burner, which has good and appropriate thermal properties, in particular in terms of thermal stress and thermal shock resistance.

[0029] Another object of the invention is to propose a component of a gas burner or an article placed above and / or near a gas burner which has good and appropriate mechanical properties, in particular in terms of mechanical stability and tolerances.

[0030] Another object of the present invention is to provide a component of a gas burner or an item placed above and / or near a gas burner which is easy to clean and suitable for washing in a dishwasher.

[0031] Another object of the present invention is to propose a component of a gas burner or an article placed above and / or near a gas burner, made of an alternative material with respect to known solutions, while having substantially the same mechanical and thermal properties.

[0032] Another object of the invention is to propose a component for a gas burner or an article to be placed above and / or in the vicinity of a gas burner which has a particularly pleasing overall aesthetic effect.

[0033] Another object of the invention is to propose a component of a gas burner or an item placed above and / or near a gas burner which is made of an alternative material with respect to known solutions and which is at the same time easy to clean, has a pleasing appearance and is easy to manufacture.

[0034] Another object of the invention is to propose a component for a gas burner or an article to be placed above and / or near a gas burner which has low material and production costs.

[0035] Another object of the present invention is to propose a component of a gas burner or an article to be placed above and / or near a gas burner which can be produced in large quantities quickly and efficiently.

[0036] Another object of the present invention is to propose a component of a gas burner or an article placed above and / or near a gas burner, which has alternative and / or improved features in terms of structure and function compared to conventional components or articles.

[0037] Another object of the invention is to propose a component of a gas burner or an object placed above and / or near a gas burner which is harmless from a health point of view.

[0038] Another object of the present invention is to propose a component for a gas burner or an article to be placed above and / or near a gas burner which meets high standards both in terms of functionality and aesthetics, while having an affordable cost, thus allowing the possibility of its mass promotion. Summary of the invention

[0040] All these objects, both individually and in any combination, as well as other objects arising from the following description, are achieved according to the invention by means of a component for a gas burner or an article to be placed above and / or near a gas burner having the features of claim 1 .

[0041] The invention relates to a component for a gas burner and / or an article placed above and / or near a gas burner, characterized in that the component and / or the article comprises a core of fused silica glass with a coating comprising an electrically conductive material.

[0042] Fused silica glass core

[0043] Preferably, the fused silica glass is quartz.

[0044] The use of fused silica glass is advantageous because it has a relatively low coefficient of thermal expansion and its temperature resistance is relatively high and therefore suitable for the thermal shocks expected in a gas burner environment.

[0045] Preferably, the core of the fused silica glass may be obtained from fused silica glass powder.

[0046] Preferably, the starting material for obtaining the fused silica glass core may include fused silica glass powder mixed with a binder.

[0047] Preferably, the starting material may further comprise titanium dioxide (TiO2), chromium (III) nitrate (Cr(NO3)3), vanadium (III) chloride (VCL3) for coloring, tetraethoxysilane (Si(OC2H5)4, also known as TEOS) and / or tetraethyl orthotitanate (Ti(OC2H5)4).

[0048] Preferably, the adhesive may be a thermoplastic organic adhesive. For example, the adhesive may be selected from polyesters based on aromatic or aliphatic dicarboxylic acids and diols and / or hydroxycarboxylic acids, polycarbonates based on aliphatic or aromatic diols, polyolefins such as polyethylene, polypropylene, polybutene, polymethylpentene, polyisobutene, poly(ethylene-vinyl acetate) (EVA), ethylene propylene rubber (EPR), poly(ethylene propylene diene) (poly(ethylene propylene diene)), poly(vinyl butyral) (PVB), polyacrylates and polymethacrylates, cycloolefin polymers (cycloolefins) Polymers), and polyamides, polyacetals such as polyoxymethylene, polyethers such as polyethylene glycol (PEG), including aromatic polyethers based on bisphenols, or polyurethanes, or combinations thereof, but are not limited thereto.

[0049] Preferably, the organic binder can be a resin, which can harden when solidified or polymerized by an external stimulus. In this case, heat or radiation, particularly ultraviolet radiation, can be mentioned as an external stimulus. In some cases, mixing as an external stimulus may even be sufficient, for example in a two-part resin, in which the liquid components of the resin show enough reactivity to each other. In addition, as required, the external stimulus can include an initiator added to the organic binder for promoting solidification or polymerization of the organic binder. Suitable initiators are known to the skilled person, such as acetophenones, for example 2,2-dimethoxy-2-phenylacetophenone (DMPAP), azo compounds, for example azobisisobutyronitrile (AIBN), benzophenone derivatives, fluorescein and its derivatives, for example rose bengal, quinones, for example camphorquinone, and phosphine derivatives, for example diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide, without being limited thereto. Thus, curing or polymerization initiated by an external stimulus converts the liquid component of the resin into a solid, so that the organic binder is no longer in a moldable state. When exposed to external stimuli, the resin is either cured to result in a cross-linked structure, or polymerized to result in a non-cross-linked structure, depending on the resin used. In other words, the term "resin" used herein includes not only thermosetting resins but also thermoplastic resins.

[0050] Preferably, the core comprises at least about 5 weight percent fused silica glass and less than about 90 weight percent binder.

[0051] More preferably, the core comprises at least about 30-50 weight percent fused silica glass and at least about 40-50 weight percent binder.

[0052] Ideally, the core comprises about 60% by weight fused silica glass and about 20% by weight binder.

[0053] Conveniently, the material in the core may be suitably identified by, for example, one of the following techniques: X-ray diffraction (XRD), scanning / reflection electron microscopy (REM), energy dispersive X-ray spectroscopy (EDX), Raman spectroscopy and nuclear magnetic resonance (NMR) spectroscopy and X-ray fluorescence (XRF). Conveniently, the binder in the core may be identified using GC-MS.

[0054] Preferably, the starting material for obtaining the core of fused silica glass can be liquid (for 3D printing) or solid (for injection molding).

[0055] Preferably, the core of fused silica glass can be obtained by a 3D printing process, an injection or casting molding process and subsequent sintering to glass.

[0056] Preferably, the diameter of the fused silica glass particles is generally in the range of about 5-500 nm. More preferably, the diameter of the fused silica glass particles is generally in the range of 2-500 μm.

[0057] coating

[0058] Preferably, the sheet resistance of the coating is lower than 10^8 ohms and has a thickness of 1 μm, and more preferably, the sheet resistance of the coating is lower than 10^6 ohms and has a thickness of 1 μm.

[0059] Preferably, the resistivity of the coating is below 100 Ohm·m, more preferably below 1 Ohm·m.

[0060] Conveniently, resistivity is calculated as follows:

[0061] Remove a portion of the coating from the surface of a part / article;

[0062] Measuring the sheet resistance R and the contact area having length L and width W and thickness T, the resistivity p is calculated as R*T*W / L.

[0063] Conveniently, the sheet resistance R may be measured using various methods known to those skilled in the art, such as four-point measurement. Typically, the reference thickness may be about 25.4 μm, but other thicknesses may be measured without limiting the thickness of the applied coating.

[0064] Another measurement to be done for gas applications is to measure the arc by measuring the voltage (typical range is 13-20 kV, probes are suitable for such high voltages). In particular, the arc must be ignited (typical ignition energies are in the range of mJ to J). In addition, the current is measured using a current clamp and a fast switching oscilloscope, such as one suitable for resolving 0.1 ms. Conveniently, this test can be done by using a high voltage probe and an oscilloscope, while the geometry can be determined by, for example, a high-resolution microscope.

[0065] Preferably, the thermal expansion coefficient of the coating is lower than 21*10^-6 / K, more preferably lower than 9*10^-6 / K. Conveniently, the combination of thermal expansion coefficient and thickness is appropriately determined by a person skilled in the art of thin films, see for example: "Review article: Stress in thin films and coatings: Current status, challenges and prospects" Gregory Abadias; Eric Chasen; Joseph Kex; Marco Sebastiani; Gregory B. Thompson; Etienne Basel; Gary Doll; Conor E. Murray; Chris H. Stossel; Ludwik Martin", in Journal of Vacuum Science and Technology A 36, 020801 (2018).

[0066] Preferably, the thickness of the coating may be less than about 200 μm, more preferably less than about 1 μm.

[0067] Advantageously, the coating allows for increased fracture strength and / or controlled fracture (ie, does not break into multiple small pieces) while it provides electrical conductivity in order to generate / propagate a spark to ignite a gas flame.

[0068] Conveniently, the coating may have a thickness that satisfies the required mechanical properties (in terms of fracture strength and / or controlled fracture) and electrical properties (in terms of generation / propagation of sparks for igniting a gas flame) while the layer is not damaged by the different expansion coefficients of the quartz and the layer.

[0069] Ideally, the coating of conductive material has a thickness of 50 nm - 20 μm.

[0070] Preferably, the conductive material coating comprises a glass coating. Ideally, the conductive material coating comprises a shatterproof glass coating. More preferably, the glass coating is of the borosilicate type. Ideally, the glass coating is an alkali aluminosilicate glass. Preferably, the conductive material coating comprises a glass ceramic substrate.

[0071] Ideally, the conductive material coating comprises a glass-ceramic substrate comprising first and second major surfaces opposite to each other and a crystallinity of at least 40 wt %, and an optical film structure disposed on the first major surface. Preferably, the optical film structure comprises a plurality of alternating high refractive index (RI) and low refractive index layers and a scratch resistant layer.

[0072] Preferably, the coating is made from Corning The provided Glass coating.

[0073] Ideally, the glass coating has the following properties:

[0074] Thermal expansion coefficient (0-300 degrees Celsius): 80-90x 10-7 / ℃, for example 86.9x 10-7 / ℃

[0075] Annealing point: 646℃ / 1135F

[0076] Softening point: 912°C / 1565°F

[0077] Strain point: 596°C / 1045°F

[0078] Density: 2.42g / cm3

[0079] Vickers Hardness: 489kgf / mm2

[0080] Young's Modulus: 65.8Gpa

[0081] Poisson's Ratio: 0.22

[0082] Dielectric constant: E = 8.1MHz@RT

[0083] Resistivity: log10ρ6.8 at 250°C (482°F), where ρ is in Ω.cm.

[0084] Advantageously, the coating is shatterproof.

[0085] Preferably, the coating is a glass composition that is electrically conductive and has a low coefficient of thermal expansion.

[0086] Preferably, the conductive material of the coating comprises a transparent conductive oxide (TCO). Ideally, such a transparent conductive oxide may be:

[0087] Indium oxide (In2O3:Sn,In2O3:Mo,In2O3:Ti,In2O3:H)

[0088] Zinc oxide (ZnO:Al, ZnO:Ga, ZnO:Ti)

[0089] Tin oxides (SnO2:F, SnO2:Sb, SnO2:Ta, SnO2:Nb)

[0090] Titanium oxide (TiO2:Nb)

[0091] Preferably, the transparent conductive oxide (TCO) can be obtained by using one of the following manufacturing methods: Nebulizer Spray Pyrolysis (NSP), spray pyrolysis, pulsed laser deposition, thermal evaporation, chemical sol-gel process, magnetron sputtering and vapor deposition. More preferably, for industrial-scale manufacturing, the transparent conductive oxide (TCO) can be obtained by radio frequency (RF) or direct current (DC) magnetron sputtering, which is the best technology due to their large-area deposition, high deposition rate and good reproducibility.

[0092] Preferably, the glass coating is a glass composition comprising metal powder or metal fibers.

[0093] Preferably, the component and / or the article of the gas burner may have two superimposed coatings. In more detail, the core of fused silica glass may have a first coating configured to increase fracture strength and / or have controlled fracture and a second coating configured to provide suitable electrical conductivity to generate / propagate sparks to ignite a gas flame. For example, the first coating may be a fused silica glass core provided by Corning Inc. glass coating, the second coating may be a transparent conductive oxide (TCO).

[0094] Preferably, between the core of fused silica glass and the outer coating of conductive material, there is a coating (ideally a transparent coating) configured to enhance resistance to fracture.

[0095] Color additives

[0096] Preferably, the component of the gas burner and / or the article placed above and / or near the gas burner comprises a colour additive. Preferably, the quartz core of the component and / or article comprises a colour additive. Advantageously, this allows for increased design options. Preferably, the colour additive is configured to retain its colour over a temperature range of room temperature to about 850°C, more preferably to about 1100°C.

[0097] Ideally, the colored additive comprises an organic or inorganic pigment. For example, the colored additive comprises an inorganic pigment provided by Alfarben. For example, the inorganic pigment may comprise one of the following:

[0098] Chrome antimony titanium buff rutile;

[0099] Nickel Antimony Titanium Yellow Rutile;

[0100] Bismuth Vanadate;

[0101] Zinc Ferrite;

[0102] Cobalt Aluminate Blue Spinel;

[0103] Cobalt Chromite Blue-Green Spinel;

[0104] Black Iron Manganese Oxide;

[0105] Chrome Oxide Green;

[0106] Red Iron Oxide;

[0107] Chromium iron oxide;

[0108] Manganese antimony titanium buff rutile;

[0109] Copper chromite black spinel.

[0110] Thermochromic materials

[0111] Preferably, said component of the gas burner and / or said article placed above and / or near the gas burner comprises a thermochromic material. Preferably, said quartz core of the component and / or article comprises a thermochromic material. Preferably, said thermochromic material is an additive. Preferably, said thermochromic material is configured to change its optical properties depending on temperature. Preferably, said thermochromic material is configured to reversibly change its optical properties depending on temperature.

[0112] Preferably, the optical property is related to color.Preferably, the optical property relates to light reflection and / or light absorption.

[0113] Preferably, the thermochromic material comprises a dye or a pigment.

[0114] Preferably, the thermochromic material is configured to change its optical property (color) within a temperature range of about 50-200° C., more preferably within a temperature range of about 50-100° C., and ideally within a temperature range of about 60-80° C. Preferably, the thermochromic material is configured to have an activation temperature of about 50-60° C. for changing its optical property.

[0115] Preferably, the thermochromic material is configured to maintain a first color at a first temperature that is significantly lower than the temperature of a flame emerging from a gas burner.

[0116] Preferably, the thermochromic material comprises thermochromic liquid crystal (TLC).

[0117] Preferably, said component of the gas burner and / or said article placed above and / or near the gas burner comprises an additional coating with thermochromic liquid crystal (TLC), which is applied once the core of fused silica glass is prepared. For example, such additional coating can be applied in the same step as the coating of conductive material.

[0118] Preferably, the thermochromic material comprises titanium dioxide (TiO 2 ).

[0119] Preferably, the thermochromic material comprises zinc oxide (ZnO).

[0120] Preferably, the thermochromic material and / or the colored material is added to the mixture during the preparation of the mixture.

[0121] Advantageously, the thermochromic material allows easy and quick identification of overheating, thus facilitating safety. Furthermore, the thermochromic material contributes to the comfortable and unique design of the component.

[0122] Preferably, said component of the gas burner and / or said article placed above and / or near the gas burner comprises a UV absorber (stabilizer).

[0123] Part Type

[0124] Preferably, the component of the gas burner is a cover (also called "lid" or "cap"), ie a component which together with the underlying base defines a chamber for mixing and / or distributing the air-gas mixture.

[0125] Preferably, the cover can have any shape or size of known gas burners. For example, the cover can be disc-shaped, ring-shaped, plate-shaped, or have an elongated shape, flat or concave.

[0126] Preferably, the component of the gas burner is a base on which the cover is located.Preferably, the base is configured to act as a flame spreader.

[0127] Preferably, the component of the gas burner is an injector holder, ie a component on which at least one injector is mounted.

[0128] Ideally, openings for flame escape are defined in the base and / or the cover.

[0129] Preferably, the article placed above and / or near the gas burner comprises a support for a pot or cooking vessel. Ideally, the article is grid-like. Ideally, the article comprises at least one support arm.

[0130] Preferably, said component of the gas burner and / or said article placed above and / or near the gas burner comprises an encapsulation of a thermochromic material in a polymer matrix.

[0131] Preferably, said components of the gas burner and / or said articles placed above and / or near the gas burner comprise an ageing resistant adhesive.

[0132] Advantageously, the cover has no enamel coating.

[0133] Advantageously, the cover is not made of cast iron.

[0134] The invention also relates to a gas burner having at least one component with one or more of the above-mentioned features. Preferably, the gas burner has a cover with one or more of the above-mentioned features.

[0135] method

[0136] The invention also relates to a method for manufacturing a component of a gas burner and / or an article placed above and / or near a gas burner, characterized in that the method comprises the following steps:

[0137] mixing starting materials, wherein the starting materials include fused silica glass powder and a binder, thereby obtaining a mixture;

[0138] shaping the mixture to define a shaped part substantially corresponding to the final shape of the part or article to be manufactured;

[0139] Sintered parts;

[0140] A coating is applied to the shaped part, thereby obtaining said part or article.

[0141] Advantageously, the shape of the part or article thus obtained is fully preserved and the shrinkage is isotropic.

[0142] Preferably, if the mixture is solid, the molding is performed by injection molding. Ideally, for injection molding, an injection molding machine is used, with a temperature of about 130° C. and a cycle time of a few seconds.

[0143] Preferably, if the mixture is liquid, it is 3D printed or cast on a mold.

[0144] Preferably, before sintering, there is a drying stage. More preferably, the drying stage is performed by heating. Ideally, the heating is performed by an oven or infrared (IR) radiation, ultraviolet (UV) radiation, microwaves. For example, the molded part is processed in an oven at about 600°C to remove the binder.

[0145] Preferably, the sintering stage is carried out at about 1300°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0146] Hereinafter, the present invention is further explained in some preferred embodiments thereof, which are for illustrative and non-limiting purposes only, with reference to the accompanying drawings, in which:

[0147] Figure 1A shows an exploded perspective view of a burner according to the present invention in a first embodiment;

[0148] Figure 1B Shows Figure 1A A perspective view of an assembled burner;

[0149] Figure 2A shows an exploded perspective view of a burner according to the present invention in a second embodiment;

[0150] Figure 2B Shows Figure 2A A perspective view of an assembled burner;

[0151] Figure 3A shows an exploded perspective view of a burner according to the present invention in a third embodiment;

[0152] Figure 3B Shows Figure 3A A perspective view of an assembled burner;

[0153] Figure 4A shows an exploded perspective view of a burner according to the present invention in a fourth embodiment;

[0154] Figure 4B Shows Figure 4A A perspective view of an assembled burner;

[0155] Figure 5A shows an exploded perspective view of a burner according to the present invention in a fifth embodiment;

[0156] Figure 5B Shows Figure 5A A perspective view of the assembled burner. DETAILED DESCRIPTION

[0157] Detailed description of the invention and preferred and exemplary embodiments thereof

[0158] The present invention relates to a component (indicated by reference numeral "10") of a gas burner 2 and / or an article placed above and / or near the gas burner 2, wherein the component and / or article comprises a core of fused silica glass having a coating comprising an electrically conductive material.

[0159] Preferably, the fused silica glass is quartz.

[0160] For example, the core of fused silica glass can be obtained according to the teachings, compositions and formulations disclosed in one or more of the following documents: US10954155, WO2022 / 053632, WO2022 / 200627 and / or WO2022 / 200629, the contents of each of which are incorporated herein by reference.

[0161] Advantageously, fused silica glass has better thermal shock resistance than transparent ceramics.

[0162] Preferably, component 10 and / or article comprises a mixture of fused silica glass powder and a binder.

[0163] Preferably, the starting material for obtaining the core of fused silica glass can be liquid (for 3D printing) or solid (for injection molding).

[0164] Preferably, the sheet resistance of the coating is lower than 10^8 ohms and the thickness is 1 μm. Preferably, the sheet resistance of the coating is lower than 10^6 ohms and the thickness is 1 μm.

[0165] Preferably, the thermal expansion coefficient of the coating is lower than about 21*10^-6 / K, more preferably lower than 9*10^-6 / K.

[0166] Preferably, the coating is a glass ceramic composition prepared according to WO 2022 / 212464, the contents of which are incorporated herein by reference.

[0167] For example, the glass coating is a glass composition provided by Corning Incorporated. More specifically, the glass coating may include a glass composition having a trade name of "Gorilla Glass Victus 2".

[0168] For example, the glass coating is a glass composition provided by Asahi Glass Corporation (AGC) of Japan. In more detail, the glass coating may include a glass composition with a trade name of "Dragontrail".

[0169] Preferably, the component 10 according to the invention is a component of a gas burner 2 mounted on a hob, preferably a built-in hob. Conveniently, the burner 2 is suitable for heating a pan, or a general cooking utensil (e.g. a plate, a grill, a baking tray, a stew pot, etc.).

[0170] Conveniently, the gas burner 2 may have a single flame or multiple (ie two, three or more) flames. Conveniently, the gas burner 2 may also have a simmering flame.

[0171] Conveniently, the gas burner 2 may be configured to draw in primary air from above the cooking hob and / or from below the cooking hob.

[0172] Conveniently, the gas burner 2 may be provided with a spark igniter 18 and / or a thermocouple 20, or may be devoid of them.

[0173] As can be seen from the figure, the component 10 of the gas burner 2 according to the present invention can be a cover 8 (also called a "cover" or "cap") and / or a base 4 and / or an injector holder 6 of the gas burner 2, wherein the cover 8 is a component on the top of the gas burner 2 and is located above the base 4, and the base 4 is located on the injector holder 6, which is a component on which at least one injector is installed.

[0174] Conveniently, the component 10 according to the invention is defined by the cover 8 of the gas burner 2 .

[0175] Preferably, the cover 8 may be configured to define, together with the base 4 , at least one chamber 40 for mixing and / or distributing the air-gas mixture.

[0176] Preferably, the cover 8 may be (according to a plan view) disc-shaped (see for example Figure 1A , 1B and 5A, 5B), annular (see, for example Figure 2A , 2B ), plate-shaped or having an elongated shape (see, for example, Figure 4A , 4B ), having an annular elongated shape (see, for example, Figure 3A , 3B ). Preferably, the cover 8 may be flat or concave. Conveniently, the cover 8 has two dimensions (length and width) which are much larger than the third dimension (thickness).

[0177] Preferably, the base 4 , in particular the at least one dispensing chamber 40 defined therein, may be (according to a plan view) disc-shaped, annular, elongated or annular-elongated.

[0178] Preferably, the base 4 may be provided with one or more ducts 44 for conveying the air-gas mixture to respective distribution chambers 40 which may be defined in the same base or closed at the top by a cover 8. Conveniently, the base 4 may comprise one or more components.

[0179] Preferably, the base 4 can act as a flame spreader. In particular, the base 4 can be provided with an opening 42 for flame discharge.

[0180] Conveniently, in other possible embodiments, the segmentation of the flame is performed by the lid rather than the base 4, and in this case, the corresponding opening can be defined on the lid. Conveniently, in other possible embodiments, the segmentation of the flame is performed by the cooperation of the lid 8 and the base 4.

[0181] Preferably, the gas burner 2 may include at least one linear venturi channel. Conveniently, the at least one linear venturi channel may be substantially horizontally or vertically aligned. Conveniently, the at least one linear venturi channel may be defined inside the base 4 or inside the syringe support 6, or defined by positioning the base 4 on the syringe support 6.

[0182] Preferably, the gas burner 2 may include at least one radial venturi. Conveniently, the at least one radial venturi channel may include at least one conduit that exits on the chamber so as to produce a radial venturi effect. Conveniently, the at least one conduit and the chamber may both be defined inside the base 4. Conveniently, the at least one conduit may be defined in the base 4, and the chamber is defined by positioning the cover 8 on the base 4.

[0183] Conveniently, the gas burner 2 (see, for example, the embodiments of 2A, 2B) may include an annular cavity 50 for separating the inner central distribution chamber 40' and the outer annular distribution chamber 40".

[0184] Conveniently, the gas burner 2 (see, for example, 3A, Figure 3B An embodiment of the invention may include an inner cavity 50 surrounded by an annular distribution chamber 40, which may be divided into two symmetrical branches.

[0185] Preferably, the gas burner 2 consists only of the base 4 , the syringe holder 6 and the cover 8 .

[0186] Preferably, the syringe support 6 is provided with means 60 for fastening it to the iron frame. Conveniently, at least one syringe is mounted on the syringe support 6, which may be aligned vertically or horizontally and is fluidly connected to one or more gas supply inlets 61.

[0187] Preferably, the syringe support 6 may include at least one concave member defining at least one well or cup in which at least one syringe is mounted. Conveniently, the syringe support 6 may be (according to a plan view) disc-shaped or have an elongated shape. Conveniently, one or more cavities and one or more conduits or venturi conduits may be defined (or accommodated) within the syringe support 6.

[0188] The operation of the gas burner 2 according to the invention is conventional. In particular, the gas reaching the injector holder 6 from the gas supply inlet 61 is discharged from each injector and mixed with the primary air sucked in from above and / or below the cooking rack. The gas-primary air mixture flow then reaches the distribution chamber for supplying the corresponding flames of the flame group.

[0189] The gas burner 2 can be, for example, small in size and have a single flame ring (see Figure 1A and 1B ), which may be of a high combustion capacity type and have two concentric flame groups (see Figure 2A and 2B ), which may be of the elongated type with inner and outer flame groups (see Figure 3A and 3B ), which may be of the elongated type with a single outer flame group (see Figure 4A and 4B ), and can have two sets of flames overlapping each other (see Figure 5A and 5B ).

[0190] Conveniently, the object placed above and / or near the gas burner according to the present invention may be a support for a pot or cooking vessel. Preferably, the object may be grid-shaped and / or may include at least one support arm.

[0191] In the following, some examples of starting mixtures and of components in the component 10 of the gas burner 2 according to the invention and / or in the objects placed above and / or near the gas burner according to the invention are provided.

[0192] Conveniently, the material in the component 10 and / or article according to the present invention can be suitably identified by one of the following techniques: X-ray diffraction (XRD), scanning / reflection electron microscopy (REM), energy dispersive X-ray spectroscopy (EDX), Raman spectroscopy, nuclear magnetic resonance (NMR) spectroscopy and X-ray fluorescence (XRF).

[0193] Example 1

[0194] In a first example, the core of the component 10 of the gas burner 2 and / or the items placed above and / or near the gas burner 2 are obtained by mixing about 40-60 wt. % of fused silica glass powder and about 40-60 wt. % of a binder. The particle size of the fused quartz is about 5-500 nm.

[0195] A glass coating is then applied to the core thus obtained, the glass coating comprising a glass composition with the trade name "Gorilla Glass Victus 2".

[0196] Example 2

[0197] In a second example, a core of a component 10 of a gas burner 2 and / or an article placed above and / or near the gas burner 2 is obtained by mixing about 70-80 wt. % of fused silica glass powder and about 20-30 wt. % of a binder defined by poly(vinyl butyral).

[0198] A glass coating was then applied to the core thus obtained, the coating comprising a glass composition supplied by Asahi Glass Co. (AGC) of Japan under the trade name "Dragontrail".

[0199] Example 3

[0200] In a second example, the core of the component 10 of the gas burner 2 and / or items placed above and / or near the gas burner 2 are obtained by mixing about 50-70 weight % of fused silica glass powder and about 20-30 weight % of a binder defined by EVA copolymer (poly(ethylene-vinyl acetate)) or polypropylene.

[0201] A glass coating is then applied to the core thus obtained, the glass coating comprising a transparent conductive oxide (TCO), in particular indium oxide (In2O3:Sn, In2O3:Mo, In2O3:Ti, In2O3:H).

[0202] Example 4

[0203] In a fourth example, the core of the component 10 of the gas burner 2 and / or items placed above and / or near the gas burner 2 is obtained by mixing about 50-70 wt % of fused silica glass powder and about 20-30 wt % of a binder defined by an acrylic resin.

[0204] A glass coating is then applied to the core thus obtained, the glass coating comprising a glass composition with the trade name "Gorilla Glass Victus 2".

[0205] Preferably, the glass coating further comprises about 0.1-5 wt % of a color additive.

[0206] Preferably, the colored additive comprises an inorganic pigment. For example, the colored additive comprises an inorganic pigment provided by Alfarben. For example, the inorganic pigment may include one of the following:

[0207] chromium antimony titanium light yellow rutile;

[0208] nickel antimony titanium yellow rutile;

[0209] Bismuth vanadate;

[0210] Zinc-iron spinel;

[0211] Cobalt aluminate blue spinel;

[0212] cobalt chromite blue-green spinel;

[0213] Black iron-manganese oxides;

[0214] Chrome oxide green;

[0215] Red iron oxide;

[0216] Chromium iron oxide;

[0217] Manganese, antimony and titanium light yellow rutile;

[0218] Copper chromite black spinel;

[0219] Preferably, the colored additive may be a thermochromic material.

[0220] Example 5

[0221] In a fifth example, the core of the component 10 of the gas burner 2 and / or the items placed above and / or near the gas burner 2 is obtained by mixing about 50-70% by weight of fused silica glass powder and about 20-30% by weight of a binder defined by an EVA copolymer (poly(ethylene-vinyl acetate)) or polypropylene. On the core thus obtained, a first glass coating is then applied to mechanically stabilize the component, for example it is a glass composition with the trade name "Gorilla Glass Victus 2". In a further step, another (second) coating is applied, which comprises a transparent conductive oxide (TCO), in particular indium oxide (In2O3:Sn, In2O3:Mo, In2O3:Ti, In2O3:H). The coating can be applied using a thermal evaporation process.

[0222] Example 6

[0223] In a sixth example, the core of the component 10 of the gas burner 2 and / or items placed above and / or near the gas burner 2 are obtained by mixing about 50-70 weight % of fused silica glass powder and about 20-30 weight % of a binder defined by EVA copolymer (poly(ethylene-vinyl acetate)) or polypropylene.

[0224] On the core thus obtained, a first glass coating is then applied to mechanically stabilize the component, for example a glass composition known under the trade name "Gorilla Glass Victus 2". In a further step, another (second) coating is applied, which comprises a transparent conductive oxide (TCO), in particular indium oxide (In2O3:Sn, In2O3:Mo, In2O3:Ti, In2O3:H). This coating can be applied using a thermal evaporation process. In another additional step, a thermochromic printing is applied on a portion of the component intended to be kept below 260°C.

[0225] Advantageously, suitable electronics with optical sensors may be used to detect the color change of the portion and use this detection for control and / or monitoring.

[0226] Advantages

[0227] It can be clearly seen from the above that the solution according to the present invention has more advantages than the traditional solution, especially:

[0228] Increased design options;

[0229] Highly resistant to thermal shock;

[0230] with controlled breakage;

[0231] Has very good electrical conductivity;

[0232] No harm to health;

[0233] High temperature resistance and optimal thermal insulation performance;

[0234] Has good mechanical strength;

[0235] Mechanical and dimensional stability over a wide temperature range;

[0236] Lightweight, thus reducing transportation costs;

[0237] It is aesthetically pleasing;

[0238] Easy to clean;

[0239] Long service life;

[0240] More secure.

[0241] The invention has been illustrated and described in some of its preferred embodiments, but it should be understood that variations may be performed in practice on its application without departing from the scope of protection of this industrial invention patent.

[0242] In the foregoing discussion of the invention, unless stated to the contrary, the disclosure of alternative values ​​for the upper or lower limits of the permitted range for a parameter, together with an indication that one value is more preferred than another, should be interpreted as an implicit statement that each intermediate value of the parameter between the more preferred and less preferred alternative values ​​is itself preferred to the less preferred value, and is also preferred to every value between the less preferred value and the intermediate value.

[0243] The features disclosed in the foregoing description or the following drawings, expressed in their specific form or as means for performing the disclosed functions or methods or processes for obtaining the disclosed results, may, where appropriate, be used alone or in any combination of these features to implement the invention in its different forms.

Claims

1. A component (10) of a gas burner (2) or an object placed above and / or near a gas burner (2), characterized in that: The component (10) and / or article comprises a core of fused silica glass and at least one coating comprising an electrically conductive material.

2. The component or article according to claim 1, characterized in that The fused silica glass is quartz.

3. Component or article according to one or more of the preceding claims, characterized in that The core of the fused silica glass is obtained from fused silica glass powder mixed with a binder.

4. Component or article according to one or more of the preceding claims, characterized in that The core of the fused silica glass is obtained by a 3D printing process, an injection or casting forming process and subsequent glass sintering.

5. Component or article according to one or more of the preceding claims, characterized in that The sheet resistance of the coating is lower than 10^8 ohms with a thickness of 1 μm, preferably lower than 10^6 ohms with a thickness of 1 μm.

6. Component or article according to one or more of the preceding claims, characterized in that The thermal expansion coefficient of the coating is lower than 21*10^-6 / K, preferably lower than 9*10^-6 / K.

7. Component or article according to one or more of the preceding claims, characterized in that The conductive material of the at least one coating layer comprises: A glass coating, preferably of the borosilicate type, and / or Transparent Conductive Oxide (TCO).

8. Component or article according to one or more of the preceding claims, characterized in that It comprises a first coating configured to increase breaking strength and / or have controlled breaking and a second coating configured to provide suitable electrical conductivity to generate / propagate a spark to ignite a gas flame.

9. Component or article according to one or more of the preceding claims, characterized in that The part or article also includes a color additive.

10. Component or article according to one or more of the preceding claims, characterized in that The component or article also includes a thermochromic material configured to change its optical properties depending on temperature.

11. Component according to one or more of the preceding claims, characterized in that The component is formed as a cover (8) of a gas burner (2), wherein the cover (8) is a component located on top of the gas burner (2).

12. Component according to one or more of the preceding claims, characterized in that The component is formed as a base (4) of a gas burner (2) and / or as a syringe holder (6), wherein: The base (4) is a component of the gas burner located on the syringe support (6), and The base (4) is closed at its top by a cover (8) located above the base (4).

13. A method for manufacturing a component (10) of a gas burner (2) and / or an object to be placed above and / or near a gas burner according to one or more of the preceding claims, characterized in that The method comprises the following steps: mixing starting materials, wherein the starting materials include fused silica glass powder and a binder, thereby obtaining a mixture; shaping the mixture to define a shaped part substantially corresponding to the final shape of the part or article to be manufactured; sintering the shaped part, thereby obtaining the core of the part or article; A coating is applied to the shaped part, thereby obtaining the part or article.

14. The method according to the preceding claim, characterized in that Prior to sintering, there is a drying stage, preferably by heating.

15. A gas burner (2) suitable for installation on a stove, preferably an embedded stove, characterized in that: The gas burner (2) comprises at least one component according to one or more of the preceding claims.

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