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EP-4314651-B1 - GAS COOKTOP AND BURNER FOR SAME

EP4314651B1EP 4314651 B1EP4314651 B1EP 4314651B1EP-4314651-B1

Inventors

  • CHEN, Xiaojuan
  • ACOSTA HERRERO, LUIS
  • JIANG, FENG

Dates

Publication Date
20260506
Application Date
20220317

Claims (10)

  1. A burner for a gas cooktop, comprising a burner head and a burner head base (3), wherein the burner head base (3) comprises a first Venturi tube (16), a second Venturi tube (17), a first annular gas supply groove (1), and a second annular gas supply groove (2) that surrounds the first annular gas supply groove (1); the first Venturi tube (16) is configured to supply gas to the first annular gas supply groove (1); the second Venturi tube (17) is configured to supply gas to the second annular gas supply groove (2); the burner head comprises an inner ring portion (14) and an outer ring portion (8) that surrounds an outer side of the inner ring portion (14); the inner ring portion (14) comprises a fire-gathering ring and an annular wall (15) that is connected to an outer wall of the fire-gathering ring; the fire-gathering ring is in a shape of a side wall of an inverted truncated cone; the outer wall of the fire-gathering ring and an inner wall of the annular wall (15) enclose a first gas channel (21), and the first gas channel (21) is in communication with the first annular gas supply groove (1); an inner wall of the outer ring portion (8), the outer wall of the fire-gathering ring, and an outer wall of the annular wall (15) enclose a second gas channel (22), and the second gas channel (22) is in communication with the second annular gas supply groove (2); the fire-gathering ring is provided with a plurality of first fire holes (11) in communication with the first gas channel (21) and a plurality of second fire holes (12) in communication with the second gas channel (22); characterized in that the inner wall of the outer ring portion (8) comprises a top surface (10) and a side surface (9) that are connected, and the top surface (10) is provided with an inner positioning surface; a top portion of the inner ring portion (14) is provided with an outer positioning surface; and the inner positioning surface squeezes and fits in with the outer positioning surface from top to bottom.
  2. The burner according to claim 1, characterized in that : both the inner positioning surface and the outer positioning surface are in circular ring shapes.
  3. The burner according to claim 1, characterized in that : the fire-gathering ring is provided with a ring of flame-stabilizing groove (13); and at least part of the first fire holes (11) are disposed in the flame-stabilizing groove (13).
  4. The burner according to claim 1, characterized in that : the annular wall (15) is integrally formed on the fire-gathering ring.
  5. The burner according to claim 1, characterized in that : the burner further comprises cooktop support legs (7); and the cooktop support legs (7) are integrally formed on the outer ring portion (8).
  6. The burner according to claim 5, characterized in that : slots (4) are disposed on a side wall of the burner head base (3); and when the outer ring portion (8) is placed on the burner head base (3) from top to bottom, bottom ends of the cooktop support legs (7) are partially inserted into the slots (4).
  7. The burner according to claim 6, characterized in that : an outer surface of the burner head is connected to an outer surface of the burner head base (3).
  8. The burner according to any one of claims 1 to 7, characterized in that : the burner head is an inner-flame burner head; and fire holes of the burner head are all disposed in the fire-gathering ring.
  9. The burner according to claim 8, characterized in that : the burner head base (3) is provided with a plurality of legs (5), and an air supplement channel (6) is disposed at an interval between two adjacent legs (5).
  10. A gas cooktop, characterized by comprising: the burner according to any one of claims 1 to 9.

Description

TECHNICAL FIELD This application relates to the field of gas cooktops, and in particular, to a burner for a gas cooktop. BACKGROUND The gas cooktops are common household cooktops in people's daily life. The gas cooktops may be divided into a plurality of types such as a liquefied petroleum gas cooktop, a coal gas cooktop, and a natural gas cooktop according to different types of used flammable gas. Currently the types of burners for gas cooktops are rather limited, and the burner structure needs to be improved. US 2013/252183 A1 discloses a gas burner that has a burner base formed with inner and outer upwardly open annular base chambers each connected to a respective gas supply. An inner burner on the burner base has gas outlet orifices that create an inner flame ring. An annular outer burner on the burner base has inner gas outlet orifices on its inner annular periphery creating an intermediate flame ring and outer gas outlet orifices on its outer annular periphery creating an outer flame ring. This outer burner also has two coaxial and separate inner and outer annular gas chambers that are downwardly open toward the burner base. The outlet orifices of the intermediate flame ring open into the inner annular gas chamber while the gas outlet orifices of the outer flame ring open into the outer annular gas chamber. Unless there is sufficient evidence, the prior art described herein does not mean that it is recognized that the prior art is well known to a person of ordinary skill in the art to which this application relates before the filing date of this application. SUMMARY An objective of embodiments of this invention is to provide an improved gas cooktop and a burner for same. An embodiment of this invention relates to a burner for a gas cooktop, including a burner head and a burner head base. The burner head base includes a first Venturi tube, a second Venturi tube, a first annular gas supply groove, and a second annular gas supply groove that surrounds the first annular gas supply groove. The first Venturi tube is configured to supply gas to the first annular gas supply groove. The second Venturi tube is configured to supply gas to the second annular gas supply groove. The burner head includes an inner ring portion and an outer ring portion that surrounds an outer side of the inner ring portion. The inner ring portion includes a fire-gathering ring and an annular wall that is connected to an outer wall of the fire-gathering ring. The fire-gathering ring is in a shape of a side wall of an inverted truncated cone. The outer wall of the fire-gathering ring and an inner wall of the annular wall enclose a first gas channel, and the first gas channel is in communication with the first annular gas supply groove. An inner wall of the outer ring portion, the outer wall of the fire-gathering ring, and an outer wall of the annular wall enclose a second gas channel, and the second gas channel is in communication with the second annular gas supply groove. The fire-gathering ring is provided with a plurality of first fire holes in communication with the first gas channel and a plurality of second fire holes in communication with the second gas channel. This application provides a new burner for a gas cooktop. According to the invention, the inner wall of the outer ring portion includes a top surface and a side surface that are connected, and the top surface is provided with an inner positioning surface. A top portion of the inner ring portion is provided with an outer positioning surface. The inner positioning surface squeezes and fits in with the outer positioning surface from top to bottom. In a possible design, both the inner positioning surface and the outer positioning surface are in circular ring shapes. In a possible design, the fire-gathering ring is provided with a ring of flame-stabilizing groove, and at least part of the first fire holes are disposed in the flame-stabilizing groove. In a possible design, the annular wall is integrally formed on the fire-gathering ring. In a possible design, the burner further includes cooktop support legs, and the cooktop support legs are integrally formed on the outer ring portion. This application provides a new burner provided with cooktop support legs. In a possible design, slots are disposed on a side wall of the burner head base. When the outer ring portion is placed on the burner head base from top to bottom, bottom ends of the cooktop support legs are partially inserted into the slots. Therefore, the burner head and the burner head base may be better fastened, and the cooktop support legs may support the cooktop more stably. In a possible design, an outer surface of the burner head is connected to an outer surface of the burner head base. Therefore, an integrated effect of the burner head and the burner head base may be improved. In a possible design, the burner head is an inner-flame burner head, and fire holes of the burner head are all disposed in the fire-gatheri