TR201816544T4 - Gas burner unit and stove top. - Google Patents

Abstract

A burner unit (7) for a gas burner (1): the burner (7) of said gas distribution chamber (16) is covered by a burner plate (13) defining the gas outlet openings (14), the burner (1) being provided with a gas supply system (30). a connectable gas distribution chamber (16); wherein the air distribution chamber (17) is covered by an air diffuser (41) which at least partially defines one or more air outlet openings (36) spaced from the gas outlet openings (14), and which is separated from the gas distribution chamber (16). ) an air distribution chamber (17) which can be connected to a forced ventilation group (11).

Description

specification The present invention relates to a burner unit and a domestic gas stovetop are available.

As is known, a gas stovetop: it has a visible surface facing upwards. a support and enclosure having an upper wall which is containers to be heated, for example on the visible surface that defines a plane on which the pots rest. an arranged support grid; supported by support grids a series of arrays in the gap between the visible surface and the support plane to heat the containers one or more combustible gas burners configured to produce a flame contains.

Burners for conventional gas cooktops are generally used for gas supply, for example. To an external combustible gas source with mains or gas Cylinder It contains a main gas transmission channel that can be connected. Wait for one or more unit is connected to the main duct via one or more partial gas ducts.

Each of the partial gas ducts with a closed position through the partial gas to adjust the gas passage between a maximum open position configured to a regulating valve associated with it (usually so-called gas tap). Except for the regulating valve, the burner unit partial channel in response to a signal indicating erratic operation There is a safety valve to cut off the passage of gas through it. such a safety valve, upstream or downstream of the regulating valve (related to the flow direction of the gas from the main duct to the burner unit) ) or integrated in the valve body of the regulating valve.

In conventional household gas stovetops, the burner: part of the burner unit arranged opposite and to absorb a primary amount of air in the partial gas flow. A suitable venturi tube mixer is available for an unventilated burner or an atmospheric air burner (induced air burner is called). Support plane for efficient combustion flames in the gap between the (bottom of the pot) and the visible surface of the upper wall There must also be another secondary air volume drawn by the

In order to obtain the most complete possible combustion, a large amount of secondary air and consequently such a range means that emissions - in particular to meet the standards for CO and CO2-reduction to a minimum free lift height (approximately 35 mm in the present case) must have. As a result, prior art stovetops are an undesirable They are bulky in shape and are associated with environmental sustainability, health and household appliances. users who are more conscious of the impact on their furniture design. does not meet their needs.

In European patent application EP2072901A: having a visible surface a household gas stovetop with a top wall, arranged in the top wall and creating flames in the area between the visible surface and a pot support plane A burner configured to feed a gas stream to the burner a gas supply system, as well as a secondary air a forced suction suitable for sucking up the volume of the burner and feeding it to the burner unit. group is described.

A burner unit for a gas stovetop can also be from the European patent application no. FR2618881A2 that has been disclosed. known. Such a known solution is essentially a solution in terms of C0 and CO2. support plane to allow reduction and innovative design solutions a decrease in the distance between the (bottom of the pot) and the visible surface. The flame itself can be unstable and the burner unit small relative movements of its individual components as instability effects of the flame. can result.

Reference is made to the prior art for the purpose of the present invention. have characteristics such as preventing at least some of the disadvantages is to provide a home-type gas stovetop.

Within this main purpose, a particular aim of the present invention is high flame stability. and a reliable and precise supply of secondary air to the flame itself. burner unit and a home-type gas stovetop.

Conditions that do not serve any particular other purpose of the present invention, the burner and the system for supplying the secondary air is always completely and correctly It is to configure the burner unit and the stovetop as it is mounted.

These and other purposes, by means of a burner unit according to claim 11 and according to claim 11 carried out by means of a household gas stovetop.

Advantageous applications are the objects of dependent claims.

In order to better understand the present invention and evaluate its advantages, some applications hereinafter as an example regarding the attached figures and will be disclosed for a non-limiting purpose; of these: Figure 1 is a perspective view of a gas stovetop to an embodiment of the invention. is the view; Figure 2 is a horizontal section view of the stovetop stove in Figure 1; Figure 3 is a cross-section of a part of a stovetop according to one embodiment. is the view; Figure 4 is a perspective view of a burner unit belonging to the stovetop stove in Figure 2°. is the section view; Figures 5A-5C show a component of the cooktop from the side, respectively. the view is a perspective view from above; Figure 5D is a section view according to the V-V line in Figure 5B7.

With regard to the figures, an eV-type gas cooktop with reference number 1 fully displayed. The cooktop l is a top with a visible surface 4. it comprises a support and containment structure 2 with a wall 3 . 3 on the upper wall, Supporting containers to be heated *e.g. pots, pans, coffee cookers and a beam defining a support plane 6 on the visible surface 4 of the upper wall 3 also has more abutment elements 5. 3 on the top wall, preferably like this an orifice partially protruding from an upper wall and partially located there In addition, more burner units 7 are arranged. Burner units 7, in use support with visible surface 4 corresponding to the plane of the bottom of the pan It is configured to generate flames somewhere between plane 6.

Gas cooktop l also supported by support and enclosure structure 2 and possibly a premixed gas flow 34 with primary air 35 (Fig. 3) A gas supply system 30 configured to supply unit 7 contains.

The gas stovetop is also equipped with a suction formed in the housing structure 2 by the support. to absorb a second] air volume 10 through the opening and the visible surface 4 a (at least partially, preferably completely) extending in the housing structure 2 underneath suitable for transferring such secondary air 10 in the ventilation duct 11 it also includes a forced ventilation assembly with an electric ironer 9. A in other words, the ventilation duct 11 is preferably above the visible surface 4 . a lower side 12 of the wall 3 extends over it.

To be able to feed the ventilation duct 11, secondary air 10 volume to the burner unit 7. It combines the burner unit 7 with the electric ventilator 9.

Support members 5, preferably made of cast iron or stainless steel It can be formed integrally with the upper wall 3, which can be

Part of the burner unit 7 is also mounted in one piece with the upper wall 3. can be created.

In accordance with an application, part of the burner unit 7 or the whole burner unit 7: which first separates from the upper wall 3 and then merges here again and the upper probably from a different material, especially in relation to the 3 materials of the wall as a Pre-assembled assembly (Fig. 4), which may also be made of aluminium. can be done.

The burner unit(s) 72 are large, defining multiple gas outlet openings 14 a burner plate 13 of a circular shape, the gas supply system 30 and the gas a gas distribution chamber 16 communicating with the outlet openings 14 base 15, as well as from the gas distribution chamber 16 separate and ventilation a separate and intermittent connection from the gas outlet holes 14 that communicates with the duct 11 an air distribution chamber 17 having one or more air spaces 36 contains.

In one embodiment, the gas distribution chamber 16: with the gas outlet openings 14 to be connected to gas supply system 30 from above by burner plate 13 by an outer circumferential wall 37 provided with a side opening 38 and an inner at the edge by the tubular wall 39, as well as against the burner plate 13 a circular shape delimited from below by a lower wall 40 has.

The air distribution chamber 17 is formed within the gas distribution chamber 16 and preferably coaxial with it. Specifically, the air distribution chamber 17: tubular-shaped Wall 39 has air gaps 36 at the edge and opposite bottom wall 40 from the bottom, at least partially defining the air spaces 36 It is limited from above by the diffuser 41.

Advantageously, the lower wall 40 is inserted into the air distribution chamber 17 of the secondary air. form one or more holes 42 for its entry.

In an important aspect of the present invention, air diffuser 41: mentioned above an upper section, together with the burner plate 13, which defines the air gaps 36 43, as well as in the air distribution chamber 17 protruding from the upper part 43 and lower a diffuser formed on the wall 40 in place, which is met by means of a 45-shape coupling a positioning body 44 .

This ensures precise, precise and reliable positioning of the air diffuser 41 and therefore, it provides a correct and homogeneous secondary air flow for the flame.

In one embodiment, the positioning body 44 and the diffuser location 45 are: preferably concentric with the axes of symmetry of the air and gas distribution compartments 17, 16 and, preferably along an axis 46, which is substantially concentric, reciprocal insertion it applies a sliding coupling along a single axis 46 via Especially, to accommodate a free end of the diffuser body 44 locating the place 45 convenient but should not be removed for easy cleaning or maintenance of the burner unit. It creates a hole that allows

The air diffuser 41 is mushroom shaped and the upper part 43 is located in the 17 part of the gas distribution chamber. To define said air spaces 36 facing inwards, burner together with the plate 13, on a radially inside edge of the burner plate 13 It has a bottom surface 47 that rests on it. Gas outlet 47 to the lower surface 47 of the air diffuser 41 secondary air flow to meet the flames at a certain distance from the vents. radially outward and upward (i.e. 6 to the support plane) are inclined to guide (correctly).

Advantageously, the burner plate 13 provides an annular protrusion 48 or the air flow (air 36 downstream of their gaps) to deflect further upstream in the flame field a circle between the gas outlet openings 14 and the air gaps 36 for the purpose of an overhang formed by segments running along forms.

In one application, at least one burner unit 7: for small pans, For example, those with diameters less than 120 mm, to make a support plane which can be positioned above the burner plate 13, for example cast iron or a bearing reducer 49 made of stainless steel, for example cross It contains a shaped frame. Such a bearing reducer 49 is advantageous. As a result, the upper part of the air diffuser 41 is joined to 43. In this way, If the bearing reducer 49 is disconnected from the burner unit 7, the burner unit cannot be used. and therefore a correct and complete countertop in working conditions. It provides the furnace assembly (and in the presence of a bearing reducer).

For connection between air diffuser 41 and abutment reducer 49, upper part 43 It has a hole 1 to accommodate a screw connection and is positioned to facilitate access for screwing the body 44 with a screwdriver it has an open tubular portion 50 .

The gas supply system 30 of the stovetop 1 is connected to an external flammable gas source. It includes a main conduit 31 for supplying connectable gases. one or more many partial channels 32 connect the main channel 31 with each of the burner units 7 and a regulating valve 33, partly associated with the conduit 32, of the gas: via partial channel 32 between position and a maximum open position It allows the transition to be adjusted - preferably seamless -.

As already stated earlier, on partial channel 32: during operation, partial gas flow 34 in the duct constitutes an initial volume of combustion-supporting primary air 3 There may be air supply means configured as drawn.

Air supply means eg: for gas having a section with a knuckled section a venturi tube device with a passage 2 and close to the part with the knuckle opened _so that the gas is forced to absorb the primary air volume into the partial gas flow 34 primary air acting as a driving fluid 35 one or more includes transition.

In the case where the above-mentioned air supply means are provided, forced suction group 9 advantageously draws the second] air from the suction area of the primary air. It is configured to absorb from space.

A control group 53, at the same time that the gas is fed to the burner 7 To activate the forced flow of air, the regulating valve 33 must be operated. in turn, it controls the forced suction pump 9.

The EV-type gas stovetop l has many advantages. of the air diffuser configuration and shape connection under the burner unit. Thanks to its positioning, the secondary air can be flowed and the person homogeneously. dispersed and transferred to the flame precisely and reliably. This in the figure, at a height of 8 between the visible surface 4 and the bottom of the pot. availability of high flame stability even with large reductions is provided.

Higher flame stability for the same thermal power of the burner, respectively. It also contributes to combustion as well as to the reduction in terms of C0 and CO2.

Of course, one skilled in the art: as determined by the following claims, possible, all of which are in any case covered by the scope of protection of the invention. and wait according to the present invention to fulfill specific requirements. More modifications and variations for the unit and the domestic gas stovetop can provide.

Claims (10)

REQUIREMENTS - a gas distribution chamber (16) connectable with a gas supply System (30) for the Cooktop (1), where said gas distribution chamber (16) is covered by a burner plate (13) defining the gas outlet openings (14); - separate from the gas distribution chamber (16) and above the countertop, where the air distribution chamber (17) is covered by an air diffuser (41) that at least partially defines one or more air outlet openings (36) spaced from the gas outlet openings (14) the furnace (1) comprising an air distribution chamber (17) which can be connected to a forced ventilation group (11); an upper part (43) in which the air diffuser (41) is mushroom-shaped and defines the air outlet openings (36) at least partially, and the air distribution chamber (43) protruding from the upper part into the air distribution chamber (17) 17) a positioning body (44) which is received via shape coupling at a diffuser location (45) formed in a lower wall (40); air gaps () in a region of the upper part (43) of said air diffuser (41) facing towards the inside of the air distribution chamber (17) and radially closer to an axis (46) of the body (44) in relation to the gas outlet openings (1). 36) together with the fact that the burner plate (13) has a lower surface (47) located radially on one of its inner edges, and said lower surface (47) of the air diffuser (41) a secondary air flow from the forced ventilation group, to a certain burner unit (7) for a gas stovetop, characterized in that it is inclined to direct radially outwards and upwards from the burner unit (7) in order to meet the flames at a distance from the gas outlet holes (14). 2. Gas distribution chamber (16): an inner tube-shaped, by said burner plate (13) an outer circumferential wall (37) equipped with a side opening (38) for connection with the gas supply system (30). it has a circular shape defined by the wall (39), as well as a lower wall (40) against the burner plate (13); the air distribution chamber (17): formed within the gas distribution chamber (16) and defined by said tubular wall (39) and by the bottom wall (40) across the air spaces (36); said bottom wall (40) forms one or more holes (42) for the communication of the air distribution chamber (17) with the forced ventilation group (11); Burner unit according to claim 1 3. said positioning body (44) and diffuser location (45) form a sliding coupling along a single axis (46) by mutual joint; The burner unit (7) according to any one of the preceding claims. 4. said axis (46) is concentric with the air and gas distribution chambers (17, 16); The burner unit (7) according to any one of the preceding claims. 5. The diffuser location (45) forms a hole suitable for removably receiving the free ball end of the positioning body (44); The burner unit (7) according to any one of the preceding claims. 6. comprising an annular protrusion (48) between the gas outlet holes (14) and the air spaces (36); The burner unit (7) according to any one of the preceding claims. 7. comprising a bearing reducer (49) that can be positioned on the burner plate (13) in order to make a support plane for small pots, where said abutment reducer (49) is combined with the upper part (43) of the air diffuser (41); The burner unit (7) according to any one of the preceding claims. 8. The upper part (43) of the air diffuser (41) forms a hole (51) that accommodates a screw connection, and the positioning body (44) forms an open tubular-shaped section (50) to facilitate access to the screw; The burner unit (7) according to any one of the preceding claims. 9. The whole burner unit (7) is made as a pre-assembled group that can be attached to an upper wall of the cooktop (1); The burner unit ( 7 ) according to any one of the preceding claims. 10. The burner unit (7) is mostly made of aluminum; Burner unit according to any one of the preceding claims (7 l. - One or more burners according to any one of the preceding claims - a gas supply system (30, 31) configured to supply a gas stream (34) to said burner unit (7) , 32, 33); - domestic set comprising a forced ventilation assembly (9, 11) suitable for sucking in a secondary air volume (10) and for feeding said secondary air (10) flow to said burner unit (7) - a support and containment structure (2) with an upper wall (3) having a visible surface (4); - said support plane (6) being the visible surface (4) of the upper wall (3) said one or more burner units (7), comprising one or more abutment members (5) arranged on said upper wall (3) and defining a support plane (6) for the containers to be heated, where they are arranged on said upper wall (3) and at the location between said visible surface (4) and said support plane (6) (8) they are configured to produce flames; Domestic stovetop (1) according to claim 11.