DE2851019A1 - Gas fire giving appearance of coal fire - has gas burner nozzles located between simulated coal on lid of fore - Google Patents

Abstract

The gas fire has a base (5) fitted with a gas injector (6) mounted horizontally across the base. The gas is fed to the fire through a nozzle (7) at the end of the gas supply line. The top of the fire is pierced with a number of vertical holes (3, 4) which connect with the outside. The holes are located between simulated lumps of coal (2) and the fire is ignited on the outside of the burner to give the illusion of burning coal.

Description

"Gas-heated radiator"

The invention relates to a gas-heated radiator, in particular one the surface-burning radiators described in GB-PS 1 436 842 or furnace (hereinafter referred to as generic radiator), the passages have to conduct a gas / air mixture, which is from the back of the Extend the radiator to the side on which the combustion takes place; these emitters have an open structure made of bonded refractory ceramic fiber and a constant operating temperature of fibers and binders of at least 1000 ° C.

With an open structure "a structure is to be referred to, which in the consists essentially of fibers that are bound at their crossing points and have free spaces or surfaces between them; in contrast, there is a burned one Mass in which fibers are embedded. The porosity of the structure should be in the range of 60%, preferably more, in particular 75 - 85% excluding the gas passages, be.

In GB-PS 1 436 842 of the applicant, a form of a radiator is used described in which the "combustion area" has a uniform pattern of parallel Rows with protrusions in the form of four-sided pyramids and corresponding rows of gas / air passages, with a single passage between the corners is present at the base of adjacent pyramids. When the gas / air mixture burns one obtains essentially uniform heating of the pyramids and thus one uniform emission of visible rays from the surface of the radiator. Because of its open design, the heater has good insulating properties; for this reason there is little heat loss by conduction through the heater.

For a long time there has been a need for a Gas fire is said to resemble a solid fuel fire.

To be like a solid fuel fire, it is a gas fire It is common to provide a radiator mass that consists of a mass of individual pieces a suitable material such as a solid colored refractory material.

Such a material must be carefully placed in a special holder are arranged and is heated by burner flames which are attached so that the flames must penetrate the whole mass and heat it to glow. Such Gas firing looks only slightly like a solid fuel fire. It is also useless because of thermal conduction and heating of the radiating Mass considerable losses occur.

According to the present invention, a gas-heated radiator is the mentioned genus is made available, which is advantageous to manufacture and install is, very well gives the impression of a heating with solid fuel and has good radiation properties.

According to the invention has a gas-heated radiator of the type mentioned a surface with bumps or protrusions that are shaped and heat resistant are painted or dyed to represent pieces of solid fuel; between the projections areas are colored in such a way that they are ash or smoldering coals represent, the gas / air passages are statistically distributed in the areas and are arranged to direct the flames so that the projections give the appearance of non-burning fuel.

With this form of a radiator, not only can the entire radiator material be in one piece for a furnace, what the manufacture and assembly in the heating device relieved; because of the open structure of the bonded refractory ceramic material and the low thermal conductivity of the ceramic fiber, the humps or bumps, which should represent the solid fuel, not heated until glowing, so that they get the appearance of unburned solid fuel. The spotlight can be made in any appropriate way. For example, a slurry from a refractory fiber such as e.g. an alumina-silica fiber and a binding agent, such as binding clay, in a vacuum or through a filter on a wire screen mold suitable shape to be poured; then this green shape is produced dried, the dried green shape will be different in the desired pattern painted and then heated in an oven at a suitable temperature to make the colors to burn in. The coloring can be done by coloring or by coating with a glaze or done in both ways, with the coloring by brush application by hand or can be done by manual or mechanical spraying.

The passages according to the invention can be used during casting or after burning by piercing or drilling.

According to the invention, the new radiator can be installed in a gas heating unit be used; it becomes education from a basin or trough-like frame an enclosure, the frame having a venturi-shaped inlet after the Has enclosure through which the gas / air mixture to the passages in the radiator flows. In use, a flammable gas is injected from a nozzle into the venturi so that air is entrained and a combustible mixture in the enclosure generated, which is passed through the passages in the radiator to its outer surface will.

The figures illustrate an embodiment of a gas heating unit, which has a radiator according to the invention.

FIG. 1 is a perspective view of the unit and FIG. 2 is a longitudinal section through the unit.

The unit shown has a radiator 1 with distributed over it Bumps or protrusions 2 in the form of pieces of unburned fuel, e.g. coal, on, the spaces or surfaces 3 between the bosses or projections 2 a have statistical distribution of the outlet ends of the passages 4, one of which combustible gas / air mixture from an enclosure formed by the radiator 1 which is attached to a basin-like or trough-like frame 5 as a cover is supplied. The frame 5 has a venturi-shaped inlet 6 into the Gas is introduced from an inlet nozzle 7, so that air is entrained and a gas / air mixture is formed.

If the humps or protrusions are supposed to be charcoal, they will preferably coated with a heat-resistant black glaze and the surfaces brightly colored between them.

Example A radiator that is supposed to represent a coal fire is through Vacuum casting made on a wire mesh mold. The shape corresponds to the combustion area of the radiator and the casting material is a slip made of ceramic fiber and a Binder.

The fiber is an aluminosilicate that is made from molten kaolin or Porcelain clay is made and has the following properties: Melting point 17600C stable working temperature 12600C max.

Average fiber diameter 2.8 m Analysis: aluminum oxide Al203 45.18 silicon dioxide SiO2 51.9 iron oxide Fe203 1.3 titanium dioxide TiO2 1.7 magnesium oxide MgO traces calcium oxide CaO 0.1 alkali as Na20 0.2 boric anhydride B203 0.08 Das Binder is plastic clay or pottery clay.

The slip is made up of 5 parts by weight of fibers with lengths of about 15 up to 25 cm, 2 parts by weight of pottery clay and 0.1 part by weight of boron phosphate as a flux. The ingredients are mixed in a sack mixer to form a slip in which the fiber lengths are for the most part between 0.025 and 1.25 cm. The through the The pliable green molding produced by casting is dried at 150.degree.

The soft, brittle molding produced in this way is now treated with pickling and Colored glazes.

The protrusions or humps are covered with a black glaze essentially from a mixture of iron oxide, chromium oxide and cobalt oxide with aluminum oxide consists, colored black; if desired, a red coloring agent can be added under the glaze, which consists of iron oxide, chromium oxide and zinc oxide can be applied.

The areas remaining between the protrusions are colored red and brown colorants and / or yellow and red-brown glazes as required colored. The red coloring agent may have the above composition and the brown colorant can be a mixture of iron and chromium oxides.

The yellow glaze can be made from a mixture of oxides of tin, antimony, Praseodymium and zirconium are made up of alumina, and the glaze is reddish brown a mixture of oxides of iron, chromium and zinc with aluminum oxide.

The ingredients are used to apply to the dried blank the colorants and glazes prepared as suspensions in water.

The colored or painted form is in air at around 1050 ° C for Burned for half an hour, which is enough to bind the fibers together. the Fired form is firm enough to handle.

The gas / air passages are then formed by drilling.

In summary, a one-piece gas-heated radiator with surface combustion described. It consists of an open structure made of bonded refractory ceramic Fiber and has a constant working temperature of at least 1000 C. The radiator (1) should look similar to a solid fuel firing system. This is because of this achieved that there are protrusions or humps on the surface, which are so colored, that they represent unburned pieces of fuel and areas between the projections which are colored so that they represent ashes and glowing coals.

The outlets of the passages for a are distributed in these areas Gas / air mixture provided, the passages directing the flames so that the Protrusions or bumps continue to look like they won't burn.

Claims (4)

Claims f (gas-heated radiator with surface combustion, thereby characterized in that it has a surface with projections (2) which are so shaped and heat resistant are colored to represent pieces of solid fuel, and between the Projections faces (3) which are colored so that they are ash or smoldering Represent coals, and that gas / air passages (4) randomly distributed in the areas and are arranged to direct the flames so that the projections give the appearance keep from non-burning fuel. 2. Gaso-heated radiator according to claim 1, characterized in that that the projections (2) are shaped so that they represent unburned coal, and are coated with a black heat-resistant glaze, and the other surfaces (3) Represent ashes and burning fuels. 3. A method for producing a gas-heated radiator according to claim 1 or 2, characterized in that a slurry made of refractory fiber and a binder on a wire mesh shape of a suitable shape for production of a green molding, drying the green molding, the dried green molding The molding with stains (dyes) and / or glazes colors and the colored molding burns in an oven. 4. Use of a radiator according to claim 1 or 2, in a gas heating unit, wherein the radiator of a basin-like frame (5) which forms an enclosure, is carried, and the frame forms a venturi inlet (6) in the enclosure, from where a gas / air mixture flows to the passages (4) in the Stranler (1).