FR2629178A1 - Decorative gas fire (burner) - Google Patents

Abstract

The invention relates to a decorative gas fire (burner). The subject of the invention is a decorative gas fire (burner) giving the appearance of logs of wood, pieces of coal, of charcoal, pieces of peat or any other solid fuel, characterised in that it consists of an assembly made from a material which thermally resists flame and heat and consists of at least one element 1 comprising an upper part 2 having the shape or appearance of the said logs of wood, pieces of coal, etc, and a lower part 3 in which there is made at least one pipe or cavity 4 communicating, on the one hand, with a gas injector 12 associated with means 9, 10, 11 for the inlet and mixing of oxidising air and, on the other hand, with a certain number of locations of the surface of the said lower and/or upper part by means of a plurality of small passageways 5, ignition means being provided for lighting the fuel mixture in line with the outlet orifices from the said small passageways 5. Application to gas fires (burners).

Description

DECORATIVE GAS BURNER
The present invention relates to a decorative gas burner giving the appearance of wood logs, pieces of coal, charcoal, peat blocks or any other solid fuel.

 The burner according to the invention is characterized in that it consists of an assembly made of a material thermally resistant to flame and heat and consisting of at least one element comprising an upper part having the shape or the appearance said logs 1 pieces of charcoal1 etc ..., and one. lower part in which is formed at least one conduit or cavity communicating, on the one hand, with a gas injector associated with means for admitting and mixing combustion air and, on the other hand, with a certain number of locations of the surface of said upper part, via a plurality of small channels, ignition means being provided for igniting the combustible mixture in line with the outlet orifices of said small channels.

 Figure 1 is a schematic side elevational view in vertical section of an embodiment of a gas burner according to the invention and Figure 2 is a vertical section along line II-II of the device of Figure 1.

 In this embodiment, the burner consists of a one-piece assembly 1 comprising an upper part 2, the configuration of which reproduces, for example, two wooden logs 2a and 2b (FIG. 2) and a lower part 3 of general shape. parallelepiped (for example) in which are arranged, below the two fictitious logs 2a, 2b, two parallel horizontal ducts or cavities 4, closed at one end and open at the other.

 The conduits or cavities 4 communicate, by their upper part and by means of small channels 5 of number, shape, section, configuration and arrangement on the whole 1 variables, with the upper face 3a of the part 3, at the foot of the "logs" 2a, 2b and on either side thereof. The orifices 6 of the outlets of the channels 5 have a shape, for example circular or elongated, variable and a variable distribution all around the logs 2a, 2b.

 The lower part 3 has a collar 7 on its periphery and the assembly 1 rests on a casing 8.

 The open end of the conduits 4 widens to form a venturi 9 and opens to the right of an inlet chamber 10 and of combustion air mixture attached to the side of the casing 8 which is open for this purpose. The chamber 10 is provided with primary air inlets 11 and a gas injector 12.

 The assembly 1 is made of a material which is thermally resistant to flame and heat. I1 can be a molded material which allows to give the upper part 2 the desired configuration. The material can be formed of ceramic fibers such as for example fibers of the "PROCAL" type, of steatite, of composite materials based on mineral fibers such as rock wool or of mica particles, agglomerated using 'A suitable binder, either organic or non-organic. Preferably, the molding will be done by vacuum compression.

 The material can also be based on refractory earth or concrete loaded with oxide, in particular aluminum. The material can also be cast aluminum or iron, a metal or a metal alloy and be worked by stamping, forming or machining.

 One or more deflectors can be arranged in the chamber 10 to have a more homogeneous mixture.

 Figures 3 and 4 illustrate an alternative embodiment of the device of Figures 1 and 2 in which the burner is intended to operate in a closed hearth and is enclosed in an enclosure 13 (fireplace hearth, wood or coal stove). In FIGS. 3 and 4, the bodies homologous to those in FIGS. 1 and 2 have the same reference numbers.

 The lower part of the burner assembly consists of two parts 3b, 3c superimposed with a joint plane 14 containing the axes of the two conduits 4.

 Secondary combustion air inlets (either from the room or from outside the room through pipes not shown) are formed by passages 15 formed in the wall of the enclosure 13, in line with conduits 16 formed in the lower part (3b, 3c) of the burner assembly, on either side of the logs 2a,? b.

 Some of the channels 5 can open onto the surface of the upper part (2a, 2b) as illustrated in 6a.

 The channels 5 can be obtained using fine pins housed in the mold serving for the production of the assembly 2a, 2b, 3.3b, 3c, or else by molding a cellular material with communicating cells.

 The parts 3b, 3c are assembled by gluing or by any other means.

 The decorative part (upper part 2,2a, 2b) imitates wood, coal or another solid fuel and is decorated in the mass or by deposition of paint, enamel or other materials allowing to obtain the best possible illusion.

 FIG. 5 is a partial perspective view of a burner of the type illustrated by FIGS. 3 and 4. On the front facade is arranged an ignition device and pilot light assembly 17, the front part of the hearth being closed by a window (not shown) allowing observation of the fire show.

 The device of the invention is intended primarily for closed hearths, but it can also be used in an open hearth. If the material of the burner assembly (2,3,3b, 3c) is porous, this burner will be used in a closed hearth.

 In the embodiment of FIG. 6 the decorative upper part (logs 2a, 2b) is provided removable with respect to the lower part (3b, 3c). To this end, said logs 2a, 2b have on their lower face positioning pins 18 capable of being engaged in holes 19 provided for this purpose in part 3b, in line with the conduits 4.

 FIG. 7 shows another decorative upper part 2 ′, imitating a set of pieces of coal and also provided, on its lower face, with pins 18 for positioning.

 The logs 2a, 2b can thus be substituted for the imitation of pieces of coal 2 'in FIG. 7. This part 2' is of course provided on its upper face with a certain number of orifices 6 for the arrival of the gas mixture 4 main air, judiciously distributed.

 Of course, the invention is not limited to the embodiments shown and described but on the contrary covers all the variants in particular as regards the number, the shape and the dimensions of the decorative elements (logs, pieces of charcoal, etc. ..) and the realization in one or more parts of the burner assembly (decorative part proper 2, 2 'and underlying part for supplying the gas + primary air combustion assembly 3; 3b, 3c.

Claims (1)

CLAIM =: =: =: =: =: =: =: =: =: =: =: =: =  1. Decorative gas burner giving the appearance of wood logs, pieces of coal, charcoal, peat blocks or any other solid fuel, characterized in that it consists of a set in one heat and flame resistant material. heat and consisting of at least one element (1) comprising an upper part (2,2 ') having the shape or appearance of said logs, pieces of coal, etc ..., and a lower part (3; ; 3b, 3c) in which is formed at least one conduit or cavity (4) communicating, on the one hand, with a gas injector (12) associated with means (9,10,11) of intake and mixing of combustion air and, on the other hand, with a certain number of places (6,6a) of the surface of said lower and / or upper part, via a plurality of small channels (5), ignition means (17) being provided for igniting the combustible mixture in line with the outlet orifices (6; 6a) of said small channels (5).