EP2397757B1 - Burner cap for gas range and burner with same - Google Patents

Description

Field of the invention

The present invention relates to a burner cap, a burner and a gas stove.

Technical background

In conventional burners for gas stoves, no further burners are present between the outer and inner burners of an annular burner cap. When a cookware is put on the burner for heating, the areas without direct contact with the flame have a low temperature, while the areas of the bottom of the pot, which are in direct contact with the outer and inner burners and are heated thereby, a considerably higher temperature respectively. By a burner with such a burner cap so the bottom of the pot is heated very unevenly. This leads to a greater amount of time when cooking, a higher gas consumption and lower heating power. A deterioration of the taste is possible.

In the document CN201209862Y discloses a burner cap with a flame transfer strip, with which the above problems are solved to some extent, but not yet completely. Namely, this patent does somewhat solve the problem that no further burners are provided between the outer and inner burners; However, it leads to a low number of internal burners, resulting in a lower heating capacity and insufficient heating of the inside of the pot bottom are connected. The appearance is given greater attention, which contributes neither to a uniform energy distribution nor to increase the heat output.

The EP 2 189 718 A2 shows a burner cap for a gas hob. The burner cap has a substantially annular cap body. The cap body has a plane. At the level, at least two are outstanding out of the plane Lugs distributed in a circumferential direction of the burner cap. Furthermore, firing openings are arranged on the lugs.

Disclosure of the invention

An object of the present invention is to provide a burner cap for gas stoves, with which the distribution of the burners can be improved and the heating power can be increased.

Another object of the present invention is to propose a burner with a burner cap for gas stoves, with which the distribution of the burners improved and the heating power can be increased.

Another object of the present invention is to propose a gas range with a burner cap for gas stoves, with which the distribution of the burners can be improved and the heat output can be increased.

Accordingly, a burner cap for gas stoves is provided which comprises an annular cap body, on the underside of a - preferably concave - gas receiving space is formed. At the top of the cap body there are at least two projections, which are hollow, wherein the cavity - preferably directly - is in communication with the gas receiving space. In this case, the projections continuously increase along the circumference of the cap body in the same direction. At the higher end of the Anformung a front end surface is formed, which is enclosed by an inner side surface, an outer side surface and a top surface of the Anformung. On the inner and outer side surface of the Anformung each inner or outer burners are formed.

The individual formations are preferably the same or identical in construction, shape and size and distributed uniformly along the circumferential direction of the cap body. The individual inner and outer firing points are preferably displaced upwardly in accordance with the increase in the height of the respective Anformung, but arranged at a constant distance from the upper surface of the Anformung. In addition, adjacent inner firing points of a molding and adjacent outer firing points of a molding each have the same distance from each other.

It is preferably provided that on the front end face central burners and / or a recess are formed / is, wherein the recess is connected to the cavity of the respective Anformung.

The cap body and the Anformung are preferably in one piece, in particular materialeinstückig executed. The cap body and the Anformung can be a single component.

Preferably, the top surface of the molding with the horizontal plane includes an angle θ with 5 ° ≤ θ ≤ 30 °. The angle θ is preferably 15 °.

The number of projections is preferably two to eight. The number of projections is particularly preferably three or four.

The front end face is preferably aligned radially.

Preferably, the front end surface or the outer side surface or the inner side surface of the Anformung is tilted toward the inside of the Anformung.

Preferably, the outer side surface of the Anformung with the horizontal plane includes an angle γ with 45 ° ≤ γ ≤ 90 °.

Preferably, the inner side surface of the Anformung forms with the horizontal plane an angle δ with 30 ° ≤ δ ≤ 60 °.

Preferably, the front end face of the Anformung with the horizontal plane forms an angle β with 30 ° ≤ β ≤ 80 °.

The outer and inner side surfaces of the Anformung delimited preferably with its underside in each case to the outer or inner edge of the top of the cap body.

At the lower end of the Anformung this is preferably in the top of the cap body in a plane over.

Preferably, at the lower end of the Anformung a rear end surface is formed, which is bounded by the inner side surface, the outer side surface and the upper surface of the Anformung and lower at its top than the lower edge of the central Burning points or the recess is arranged on the front end face of an adjacent Anformung.

Adjacent moldings are preferably arranged head to toe, the respective rear end face of a front molding with the underside being adjacent to the front end face of an adjacent rear molding.

Adjacent moldings are preferably arranged at a distance from one another, wherein an air supply duct is formed between the upper side of the cap body and the adjacent moldings.

It is preferably provided that the inner combustion points are aligned perpendicular to the inner side surface of the Anformung, the outer focal point perpendicular to the outer side surface of the Anformung and the central firing point or the recess perpendicular to the front end face.

Preferably, the cap body has a thickness or height of 5 mm to 20 mm and the Anformung a thickness or height of 2 mm to 10 mm.

On the side wall of the cap body is preferably at least one circumferential Flammenübertragungsnut.

The object is further achieved by a burner for gas stoves, comprising a burner sleeve with a gas mixing chamber, an adapted to the burner sleeve and as described above executed annular burner cap and a smaller central burner cap.

The object is finally achieved by a gas stove comprising a base, piping, valves, a cover plate, a pot carrier, an electronic control system and a burner described above.

• Das Vorsehen der mittigen Brennstellen oder der Ausnehmung erlaubt eine gleichmäßigere Verteilung der Brennstellen insgesamt. Hinzu kommt, dass die einzelnen inneren und äußeren Brennstellen entsprechend der Zunahme der Höhe der jeweiligen Anformung nach oben verschoben sind, was eine spiralförmige Flammenverteilung bewirken kann. Dadurch wird eine ungleichmäßige Wärmeverteilung durch die inhomogene Erwärmung der Topfunterseite verhindert, die Kochqualität sowie die Nutzleistung des Brenngases erhöht und dem Benutzer Kochzeit eingespart. Versuche haben gezeigt, dass mit den erfindungsgemäßen Ausgestaltungen die Heizleistung gegenüber herkömmlichen Brennerkappen um 2% bis 3% erhöht wird, wodurch Energie eingespart wird.
• Mit den vorgeschlagenen konstruktiven Ausgestaltungen kann die Brennerkappe eine geringere Durchschnittsdicke und eine kleinere Baugröße aufweisen, wodurch Material eingespart wird und die Herstellungskosten reduziert werden.
• Dadurch, dass sich die Anformungen entlang des Umfangs des Kappenkörpers kontinuierlich erhöhen, kann im Verbrennungsvorgang eine bessere Ergänzung von Sekundärluft und somit eine vollständige Verbrennung und höhere Heizleistung erzielt werden.

The present invention offers the following advantages in particular:

• The provision of the central burners or the recess allows a more even distribution of the burners as a whole. In addition, the individual inner and outer firing positions are shifted upward in accordance with the increase in the height of the respective molding, which may cause a spiral flame distribution. As a result, an uneven heat distribution is prevented by the inhomogeneous heating of the bottom of the pot, the cooking quality and the useful power of the fuel gas increases and saves the user cooking time. Experiments have shown that with the embodiments according to the invention, the heating power compared to conventional burner caps is increased by 2% to 3%, whereby energy is saved.
• With the proposed structural configurations, the burner cap may have a smaller average thickness and smaller size, thereby saving material and reducing manufacturing costs.
• Characterized in that the projections increase continuously along the circumference of the cap body, a better complement of secondary air and thus a complete combustion and higher heat output can be achieved in the combustion process.

Brief description of the figures

Fig. 1

eine perspektivische Darstellung eines Ausführungsbeispiels einer Brennerkappe für Gasherde,

Fig. 2

eine Seitenansicht des Ausführungsbeispiels einer Brennerkappe für Gasherde,

Fig. 3

eine Unteransicht des Ausführungsbeispiels einer Brennerkappe für Gasherde,

Fig. 4

eine Draufsicht des Ausführungsbeispiels einer Brennerkappe für Gasherde,

Fig. 5

eine Teilansicht des Ausführungsbeispiels einer Brennerkappe für Gasherde und

Fig. 6

eine perspektivische Darstellung eines weiteren Ausführungsbeispiels einer Brennerkappe für Gasherde.

For a better understanding of the object, the embodiments and advantages of the present invention, this will be explained below with reference to the accompanying drawings and preferred embodiments. Show

Fig. 1

a perspective view of an embodiment of a burner cap for gas stoves,

Fig. 2

a side view of the embodiment of a burner cap for gas stoves,

Fig. 3

a bottom view of the embodiment of a burner cap for gas stoves,

Fig. 4

a top view of the embodiment of a burner cap for gas stoves,

Fig. 5

a partial view of the embodiment of a burner cap for gas stoves and

Fig. 6

a perspective view of another embodiment of a burner cap for gas stoves.

The FIGS. 1 to 5 show an embodiment of a burner cap for gas stoves, which comprises a substantially annular cap body 1, on the underside of a concave gas receiving space 2 is formed. At the top of the cap body 1 there are four projections 3, which are hollow, wherein the cavity is directly in communication with the gas receiving space 2. In this case, the four projections 3 continuously increase along the circumference of the cap body 1 in the same direction, ie the Anformung 3 has a thickness or height which increases uniformly, or the top surface 6 of the Anformung 3 extends substantially at a predetermined angle obliquely up. Furthermore, the upper surface 6 of the Anformung 3, as in Fig. 5 shown, with the horizontal plane an angle θ preferably with 5 ° ≤ θ ≤ 30 °, where θ is more preferably 15 °.

At the higher end of the Anformung 3, a front end face 7 is formed, which is enclosed by an inner side surface 4 of the Anformung, an outer side surface 5 of the Anformung and the upper side surface 6 of the Anformung 3. The front end face 7 is radially aligned, i. the front end surface 7 and the upper side of the cap body 1 intersect in a straight line passing through the center of a circle described by the outer edge of the top of the cap body 1. It should be noted that due to the annular configuration of the cap body 1, each of the outer and inner edges of the top of the cap body 1 described circles are arranged concentrically to each other.

The Anformung 3 is provided on its inner side surface 4 with inner combustion or gas outlets 8 for generating internal flames and on its outer side surface 5 with outer burners or Gasausströmöffnungen 9 for generating external flames. In addition, located on the outside of the side wall of the cap body 1 according to at least one circumferential Flammenübertragungsnut 12 Fig. 2 and Fig. 5 , while on the inside of the side wall of the cap body 1 at least one ring of gas pipe holes 13 according to Fig. 3 is formed, wherein the circumferential Flammenübertragungsnut 12 is connected via the gas line holes 13 with the gas receiving space 2. Moreover, at the front end surface 7 there are provided intermediate or central exhaust ports 10 for producing intervening or central flames in the combustion process which is intended to connect the inner flames to the outer flames. The gas receiving space 2 is in Connection with a gas mixing chamber of the burner holder and serves to receive and forward the fuel gas in the circumferential Flammenübertragungsnut 12 and in the cavity of Anformung 3, wherein the fuel gas respectively from the inner combustion 8, outer burners 9, central burners 10 and from the circulating Flammenübertragungsnut 12th exit to be inflamed.

The four formations 3 are formed with respect to their structure, the shape and size the same and are distributed uniformly along the circumferential direction of the cap body 1. From the aesthetic point of view, the four formations 3 as a whole form a spiral-shaped structure. The individual inner firing points 8 are in each case displaced upward in accordance with the increase in the height of the respective molding 3 but are arranged at a constant distance from the upper surface of the molding 3. The same applies to the outer burners 9. Moreover, the inner combustion stations 8 are arranged at an equal distance from the upper side surface of the respective Anformung 3 as the outer burners 9 to the top surface of the respective Anformung 3. It follows that the inner burners 8 and the outer Burning 9 at the four projections 3 also form a total of a spiral-shaped structure. In addition, the adjacent inner firing points 8 of an Anformung 3 the same distance from each other. This is also the case with the outer combustion point 9. This ensures a uniform flame distribution. It should again be noted that the individual inner and outer burners 8, 9 are shifted upward in accordance with the increase in the height of the respective Anformung 3, so that neither the adjacent inner burners 8 nor the adjacent outer burners 9 Anformung 3 in a plane lie. It is understood that in a distance measurement of the straight line distance between the centers of each two adjacent burners to be determined.

The cap body 1 and the projections 3 are integrally formed, ie they are, for example, fused together at their joint. In addition, the front end surface 7, the outer side surface 5 and the inner side surface 4 of the Anformung 3 are inclined towards the inside of the Anformung 3, whereby on the one hand a larger area and thus a higher number of burners and a better firing efficiency can be achieved, and saved on the other material becomes. Further, the outer side surface 5 of the Anformung 3 with an horizontal plane preferably closes an angle γ with 45 ° ≤ γ ≤ 90 °, where γ is particularly preferably 70 °. Furthermore, the inner side surface 4 of the Anformung 3 with the horizontal plane an angle δ preferably at 30 ° ≤ δ ≤ 60 °, wherein δ is particularly preferably 45 °. Finally, the front end face 7 of the Anformung 3 with the horizontal plane an angle β preferably with 30 ° ≤ β ≤ 80 °, particularly preferably with 55 ° ≤ β ≤ 60 °. Previous experiments have shown that the described angular size can lead to an optimal combustion performance of the burner cap.

The outer side surface 5 of the Anformung 3 borders with its underside on the outer edge of the top of the cap body 1 and the inner side surface 4 of the Anformung 3 with its underside to the inner edge of the top of the cap body 1. At the lower end of the Anformung 3 a rear end face is formed, which is enclosed by the inner side surface 4, the outer side surface 5 and the upper side surface 6 of the Anformung 3 and lower at its upper side than the lower edge of the central burners 10 on the front end face 7 of an adjacent Anformung 3 is arranged. In this way, a trouble-free outflow of the fuel gas from the central burners 10 can be ensured.

Adjacent moldings 3 are arranged head to toe, i. The inner end 8 is perpendicular to the inner side surface of the Anformung 3, the outer focal point 9 perpendicular to the outer side surface of the Anformung 3 and the central combustion 10th aligned perpendicular to the front end face 7.

Again Fig. 5 can be seen, the cap body 1 has a height h1 of 5 mm to 20 mm, preferably 10 mm, and the Anformung 3 a height h2 of 2 mm to 10 mm, preferably 5 mm. Experiments have shown that the height described can lead to optimal combustion performance of the burner cap.

Fig. 6 shows a further embodiment of a burner cap for gas stoves, which differs from the previously illustrated embodiment in that instead of the central burners 10 in the front end face 7, a groove or recess 11 is formed, which is connected to the cavity of the Anformung 3. The recess 11 is used to create a central flame in the combustion process, which should connect the inner flames with the outer flames. In addition, because of its relatively large cross section, but also because it connects the inner and outer burners 8, 9, the recess 11 can additionally serve as a flame transmission groove. At the lower end of the Anformung 3, a rear end face is formed, which is enclosed by the inner side surface 4, the outer side surface 5 and the upper side surface 6 of the Anformung 3 and lower at its top than the lower edge of the recess 11 on the front end face 7 of an adjacent Anformung 3 is arranged. In this way, a trouble-free outflow of the fuel gas from the recess 11 can be sure.

Starting from the above exemplary embodiments, further embodiments can be obtained by exchanging and / or developing the individual features. Thus, e.g. the lower end of the Anformung 3 form no rear end face, but with the top of the cap body 1 pass into a plane. Further, it is conceivable, for example, that adjacent projections 3 are not arranged directly on the head, but spaced from each other, wherein from a rear end face or the rear end of the respective front Anformung 3, the front end face 7 of a rear Anformung 3 and the top of the Cap body 1 an air supply passage is formed to supplement secondary air for the combustion process. Finally, it can also be provided that the front end face 7 is not aligned radially but at a certain angle deviating from the radial direction. In this case, the respective four front end faces 7 may be aligned in the same direction in order to maintain a symmetry of the overall structure.

The present invention further includes an embodiment of a burner for gas stoves, comprising a burner socket with a gas mixing chamber, a burner cap adapted to the burner socket according to one of the embodiments presented above, and a smaller central burner cap. The burner cap and the burner holder are matched to each other so that the gas receiving space 2 of the burner cap is in communication with the gas mixing chamber of the burner holder to receive fuel gas from the gas mixing chamber.

Finally, the present invention comprises a gas stove which has a base, pipelines, valves, a cover plate, pot carrier, control electronics and at least one burner with a burner cap according to one of the exemplary embodiments presented above.

The above-described concerns only preferred embodiments of the present invention. It should be noted that the present invention is not limited only to the embodiments described above, but includes other possible embodiments defined by the claims in conjunction with the disclosure in the specification ,

LIST OF REFERENCE NUMBERS

1

cap body

2

Gas receiving chamber

3

conformation

4

Inner side surface of the Anformung

5

Outer side surface of the Anformung

6

Top surface of the molding

7

Front face

8th

Internal combustion

9

Outer focal point

10

Central firing point

11

recess

12

Circumferential flame transmission groove

Claims (15)

1. Burner cap for a gas range, comprising an annular cap body (1), on the lower side of which is formed a gas receiving space (2) and on the upper side of which at least two hollow mouldings (3) are arranged, wherein a respective cavity of a moulding (3) is connected to the gas receiving space (2) and the mouldings (3) continuously increase in height along the circumference of the cap body (1) in the same direction, wherein at a higher end of the moulding (3) a front end face (7) is formed, which is bounded by an interior surface (4), an exterior surface (5) and a top surface (6) of the moulding (3), and wherein interior combustion points (8) are in each case formed on the interior surface (4) of the moulding (3), characterised in that exterior combustion points (9) are in each case formed on the exterior surface (5) of the moulding (3).
2. Burner cap according to claim 1, characterised in that the individual mouldings (3) are identically formed and are distributed evenly along the circumferential direction of the cap body (1).
3. Burner cap according to claim 1 or 2, characterised in that the interior (8) and exterior combustion points (9) are displaced upwards in accordance with the increase in height of the respective moulding (3) and are arranged at a constant spacing from the top surface (6) of the moulding (3), such that the adjacent interior combustion points (8) of a moulding have an equal spacing from one another, and that adjacent exterior combustion points (8) of a moulding have an equal spacing from one another.
4. Burner cap according to one of claims 1 - 3, characterised in that central combustion points (10) are formed on the front end face (7).
5. Burner cap according to one of claims 1 - 3, characterised in that a recess (11) is formed on the front end face (7), said recess (11) being connected to the cavity of the respective moulding (3) and connecting the interior surface (4) to the exterior surface (5).
6. Burner cap according to one of claims 1 - 5, characterised in that the cap body (1) and the moulding (3) are embodied as a single piece.
7. Burner cap according to one of claims 1 - 6, characterised in that the front end face (7) is radially aligned.
8. Burner cap according to one of claims 1 - 7, characterised in that the front end face (7), the exterior surface (5) and/or the interior surface (4) of the moulding (3) is inclined towards the inside of the moulding (3).
9. Burner cap according to one of claims 1 - 8, characterised in that the undersides of the exterior (5) and interior surfaces (4) of the moulding (3) merge respectively into the exterior and interior edge of the top surface of the cap body (1).
10. Burner cap according to one of claims 1 - 9, characterised in that the lower end of the moulding (3) merges into the top surface of the cap body (1) to form a plane.
11. Burner cap according to one of claims 1 - 9, characterised in that at the lower end of the moulding (3) a rear end face is formed, which is bounded by the interior surface (4), the exterior surface (5) and the top surface (6) of the moulding (3) and at its top surface is arranged lower than the lower edge of the central combustion points (10) or the recess (11) on the front end face (7) of an adjacent moulding (3).
12. Burner cap according to one of claims 1 - 9 or 11, characterised in that adjacent mouldings (3) are arranged end to end such that the lower side of a rear end face of a front moulding (3) abuts a front end face (7) of an adjacent rear moulding (3).
13. Burner cap according to one of claims 1 - 11, characterised in that adjacent mouldings (3) are arranged spaced apart from one another and an air supply duct is formed in the top surface of the cap body (1) between the adjacent mouldings (3).
14. Burner for a gas range having a burner sleeve with a gas mixing chamber, an annular burner cap according to one of claims 1 - 13 which is aligned to the burner sleeve, and a further central burner cap.
15. Gas range with a substructure, pipelines, valves, a cover plate, a pan support, control electronics and a burner according to claim 14.

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