CN120194314A - Burners and gas stoves - Google Patents

Abstract

The invention relates to a combustor and a gas stove, the combustor comprises a stove head, an inner ring fire cover, an inner ring mixing cavity and an intermediate ring mixing cavity are formed between the inner ring fire cover and the stove head in a surrounding mode, the intermediate ring mixing cavity is arranged around the periphery of the inner ring mixing cavity, an inner ring fire hole is formed in the top surface of the inner ring fire cover, an outer ring fire cover is arranged around the periphery of the inner ring fire cover at intervals, an outer ring mixing cavity is formed between the outer ring fire cover and the stove head in a surrounding mode, a top cover is convexly arranged in the center of the top surface of the inner ring fire cover and covers the top of the inner ring fire hole, an inner ring fire seam is formed between the peripheral edge of the top cover and the top surface of the inner ring fire cover, the inner ring fire holes are communicated with the inner ring fire seam, and gas in the inner ring mixing cavity can burn at the inner ring fire seam to form inner ring gap fire, flames of the inner ring gap fire are connected with each other, so that a good flame stabilizing effect is achieved, and the flame stability of the combustor under small fire or extremely small fire combustion is facilitated to meet the low-temperature cooking requirement.

Description

Burner and gas stove

Technical Field

The invention relates to the technical field of kitchen equipment, in particular to a combustor and a gas stove.

Background

The gas cooker is a kitchen appliance which directly heats by using liquefied petroleum gas (liquid), artificial gas, natural gas and other gas fuels, and has become an indispensable electrical product in the home life. With the improvement of living standard of people, the performance requirements of people on various items of gas stoves are also higher and higher.

In the burner of the related gas cooker, particularly in the burner above three ring fires, the burner is generally provided with an inner ring fire cover, an intermediate ring fire cover and an outer ring fire cover, the inner ring fire cover forms an inner ring fire, the intermediate ring fire cover forms an intermediate ring fire, and the outer ring fire cover forms an outer ring fire.

At present, three ring fire burners on the market have the advantages that an inner ring fire cover, an intermediate ring fire cover and an outer ring fire cover are mutually separated and independent, and a secondary air supplementing channel is arranged between every two adjacent fire covers, so that the structure is complex. Meanwhile, the internal ring fire has larger heat load, and the flame is not stable enough when the small fire burns or the tiny fire burns, so that the requirement of the low-temperature cooking function cannot be met.

Disclosure of Invention

The invention aims to provide a burner and a gas stove, so as to optimize the structure of the burner in the prior art, improve the flame stability of the burner under low-fire combustion or very-low-fire combustion and meet the low-temperature cooking requirement.

In order to solve the technical problems, the invention adopts the following technical scheme:

According to one aspect of the invention, the burner comprises a burner, an inner ring fire cover, an outer ring fire cover, a top cover and an inner ring fire slit, wherein the inner ring fire cover is arranged in a central area of the top of the burner, an inner ring mixing cavity and an intermediate ring mixing cavity are formed between the inner ring fire cover and the burner in a surrounding mode, the intermediate ring mixing cavity is arranged around the periphery of the inner ring mixing cavity, the middle ring fire hole communicated with the intermediate ring mixing cavity is formed in the peripheral side wall of the inner ring fire cover, the top surface of the inner ring fire cover is provided with the inner ring fire hole communicated with the inner ring mixing cavity, the outer ring fire cover is arranged in a surrounding mode at intervals around the periphery of the inner ring fire cover, the outer ring fire cover and the burner are arranged in a surrounding mode, a top cover is arranged in a protruding mode in the center of the top surface of the inner ring fire cover, the top cover is covered above the top of the inner ring mixing cavity, the inner ring fire slit is arranged between the outer periphery of the top cover and the top surface of the inner ring fire cover, and the inner ring fire slit is communicated with the inner ring fire hole.

In some embodiments of the present application, the top cover is spaced from the top surface of the inner ring fire cover, and the inner ring fire seam is formed between the peripheral edge of the top cover and the top surface of the inner ring fire cover.

In some embodiments of the present application, the top surface center of the inner ring fire cover is convexly provided with a supporting column extending upwards, the top cover is arranged at the top of the supporting column, the inner ring fire holes are provided with a plurality of inner ring fire holes, and the plurality of inner ring fire holes are circumferentially arranged at the periphery of the supporting column.

In some embodiments of the application, a plurality of the inner ring fire holes are circumferentially arranged at the peripheral edge of the top of the inner ring air mixing chamber.

In some embodiments of the present application, the inner ring fire hole is disposed at the center of the top surface of the inner ring fire cover, a support column is disposed between the top cover and the top surface of the inner ring fire cover, the bottom ends of the support column are connected to the peripheral edge of the inner ring fire hole, the top ends of the support column are connected to the bottom surface of the top cover, the support column is disposed at a plurality of positions circumferentially spaced apart from the peripheral edge of the inner ring fire hole, and the inner ring fire hole is communicated with the inner ring fire gap through a gap between adjacent support columns.

In some embodiments of the present application, a supporting wall is arranged on the outer periphery of the top cover in a downward extending manner, the lower end of the supporting wall is connected with the top surface of the inner ring fire cover, the supporting wall is annular and circumferentially surrounds the circumferential side of the inner ring fire hole, and the inner ring fire slit is arranged on the supporting wall.

In some embodiments of the present application, the inner ring fire slits are arc-shaped, and a plurality of the inner ring fire slits are circumferentially arranged on the supporting wall at intervals.

In some embodiments of the application, the inner annular fire seam has a flare shape with a progressively larger width in a direction radially outward from the top cover.

In some embodiments of the present application, the support wall is provided with a plurality of inner annular fire slits, each inner annular fire slit comprises a plurality of inner annular fire slits circumferentially arranged at intervals, and the inner annular fire slits positioned on the upper layer and the inner annular fire slits positioned on the lower layer are arranged in a partially overlapping manner between two adjacent inner annular fire slits.

In some embodiments of the application, the inner ring fire cover is provided with a fire transfer slit, the fire transfer slit is communicated with the inner ring air mixing cavity, the fire transfer slit is exposed out of the top surface of the inner ring fire cover, the inner end of the fire transfer slit extends towards the direction of the inner ring fire slit, the outer end of the fire transfer slit is exposed out of the peripheral wall of the inner ring fire cover, and thermocouples are arranged at intervals on the peripheral side of the fire transfer slit.

In some embodiments of the application, the distance between the inner end of the fire passing slit and the inner ring fire slit is less than 3mm.

In some embodiments of the application, a middle ring fire seam is arranged on the peripheral side wall of the inner ring fire cover, the middle ring fire seam is communicated with the middle ring mixing cavity, the middle ring fire hole is arranged on the upper side of the middle ring fire seam, and the fire transfer seam is communicated with the middle ring fire seam.

In some embodiments of the application, a gas supplementing cavity is formed between the inner ring fire cover and the outer ring fire cover, and a gas supplementing hole communicated with the gas supplementing cavity is arranged on the peripheral wall of the furnace end.

In some embodiments of the present application, a first outer ring fire hole with a circular cross section is provided on a peripheral side wall of the outer ring fire cover, the first outer ring fire hole is provided with a plurality of first outer ring fire holes, the plurality of first outer ring fire holes are divided into a plurality of groups, the plurality of groups of first outer ring fire holes are circumferentially arranged on the peripheral side wall of the outer ring fire cover, which is close to the inner ring fire cover, at intervals, and an included angle of 25-35 degrees is formed between a connecting line of the plurality of first outer ring fire holes of each group of first outer ring fire holes and a horizontal plane of the inner ring fire cover.

In some embodiments of the present application, an included angle of 15-25 degrees is formed between the axis of the first outer ring fire hole and the horizontal plane of the inner ring fire cover, and an included angle of 25-35 degrees is formed between the projection of the first outer ring fire hole on the horizontal plane of the inner ring fire cover and the connecting line between the center point of the first outer ring fire hole and the center of the inner ring fire cover.

In some embodiments of the present application, a plurality of second outer ring fire holes are circumferentially spaced apart on the outer peripheral sidewall of the outer ring fire cover.

According to another aspect of the present invention, there is also provided a gas range including the burner as described above.

The embodiment of the invention has the following advantages and positive effects:

In the burner provided by the embodiment of the invention, the top of the burner is provided with the inner ring fire cover and the outer ring fire cover which are arranged at intervals, wherein an inner ring gas mixing cavity and an intermediate ring gas mixing cavity are formed between the inner ring fire cover and the burner in a surrounding manner, an outer ring gas mixing cavity is formed between the outer ring fire cover and the burner, the inner ring gas mixing cavity is communicated with the inner ring gas mixing cavity by utilizing the inner ring fire holes on the top surface of the inner ring fire cover, the intermediate ring fire can be formed by utilizing the intermediate ring gas mixing cavity communicated with the intermediate ring gas mixing cavity on the circumferential side wall of the inner ring fire cover, meanwhile, the top cover protruding on the top surface of the inner ring fire cover is covered above the top of the inner ring fire holes, the inner ring fire holes are communicated by utilizing the inner ring fire seam between the outer circumferential edge of the top cover and the top surface of the inner ring fire cover, and the gas in the inner ring gas mixing cavity can be combusted at the inner ring fire seam to form an inner ring gap fire, and the flames of the inner ring gap fire are mutually connected, so that the burner has a good flame stabilizing effect, and is favorable for improving the flame stability of the burner under small fire or extremely small fire combustion, and meets the low-temperature cooking requirement.

Drawings

FIG. 1 is a schematic view of a burner according to an embodiment of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a top view of fig. 1.

Fig. 4 is a cross-sectional view taken along A-A in fig. 3.

Fig. 5 is a partially enlarged schematic structural view of fig. 4.

Fig. 6 is a sectional view taken along the direction B-B in fig. 3.

Fig. 7 is a partially enlarged schematic structural view of fig. 6.

Fig. 8 is a schematic view of the construction of the outer ring fire cover of fig. 2.

Fig. 9 is a top view of fig. 8.

Fig. 10 is a cross-sectional view taken along the direction C-C in fig. 9.

Fig. 11 is a schematic view of the inner ring fire cover in fig. 2.

Fig. 12 is a front view of fig. 11.

Fig. 13 is a bottom view of fig. 12.

Fig. 14 is a sectional view taken along the direction D-D in fig. 12.

Fig. 15 is a sectional view taken along the direction E-E in fig. 13.

Fig. 16 is a schematic view of another embodiment of the inner ring fire cover of fig. 11.

Fig. 17 is a front view of fig. 16.

Fig. 18 is a bottom view of fig. 17.

Fig. 19 is a cross-sectional view in the direction F-F of fig. 17.

Fig. 20 is a sectional view taken in the direction G-G of fig. 18.

Fig. 21 is a schematic structural view of yet another embodiment of the inner ring fire cover of fig. 11.

Fig. 22 is a front view of fig. 21.

Fig. 23 is a bottom view of fig. 22.

Fig. 24 is a sectional view in the direction H-H of fig. 22.

Fig. 25 is a sectional view in the direction I-I of fig. 23.

Fig. 26 is a schematic view of a further embodiment of the inner ring fire cover of fig. 11.

Fig. 27 is a front view of fig. 26.

Fig. 28 is a bottom view of fig. 27.

Fig. 29 is a sectional view in the J-J direction of fig. 27.

Fig. 30 is a sectional view in the direction K-K in fig. 28.

The reference numerals are as follows, 1, furnace end, 10, air supplementing cavity, 11, inner ring injection pipe, 12, middle ring injection pipe, 13, outer ring injection pipe, 14, air supplementing hole, 15, thermocouple, 2, inner ring fire cover, 20a, inner ring mixing cavity, 20b, middle ring mixing cavity, 21, inner ring fire hole, 22, middle ring fire hole, 23, fire transmission seam, 231, fire transmission hole, 24, fire transmission channel, 25, middle ring fire seam, 3, outer ring fire cover, 30, outer ring mixing cavity, 31, first outer ring fire hole, 32, second outer ring fire hole, 33, outer ring fire seam, 4, top cover, 41, inner ring fire seam, 42, support column, 43 and support wall.

Detailed Description

Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It will be understood that the invention is capable of various modifications in various embodiments, all without departing from the scope of the invention, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the invention.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the burner of the related gas cooker, particularly in the burner above three ring fires, the burner is generally provided with an inner ring fire cover, an intermediate ring fire cover and an outer ring fire cover, the inner ring fire cover forms an inner ring fire, the intermediate ring fire cover forms an intermediate ring fire, and the outer ring fire cover forms an outer ring fire.

At present, three ring fire burners on the market have the advantages that an inner ring fire cover, an intermediate ring fire cover and an outer ring fire cover are mutually separated and independent, and a secondary air supplementing channel is arranged between every two adjacent fire covers, so that the structure is complex. Meanwhile, the internal ring fire has larger heat load, and the flame is not stable enough when the small fire burns or the tiny fire burns, so that the requirement of the low-temperature cooking function cannot be met.

FIG. 1 is a schematic view of a burner according to an embodiment of the present invention. Fig. 2 is an exploded view of fig. 1. Fig. 3 is a top view of fig. 1.

Referring to fig. 1 to 3, a burner provided in an embodiment of the present invention mainly includes a burner 1, an inner ring fire cover 2 and an outer ring fire cover 3.

The burner 1 is used for forming a mixing cavity, and external fuel gas can be mixed with air and filled in the mixing cavity. Meanwhile, the furnace end 1 is used for providing installation positions and installation spaces for the inner ring fire cover 2 and the outer ring fire cover 3 respectively, so that fuel gas in the gas mixing cavity can be combusted through the inner ring fire cover 2 and the outer ring fire cover 3 respectively. The inner ring fire cover 2 is detachably arranged in the center area of the top of the furnace end 1, and the outer ring fire cover 3 is detachably arranged in the peripheral area of the top of the furnace end 1.

Fig. 4 is a cross-sectional view taken along A-A in fig. 3. Fig. 5 is a partially enlarged schematic structural view of fig. 4. Fig. 6 is a sectional view taken along the direction B-B in fig. 3. Fig. 7 is a partially enlarged schematic structural view of fig. 6.

Referring to fig. 4 to 7, in some embodiments, when the inner annular flame cover 2 is disposed at a central region of the top of the burner 1, an inner annular air-mixing chamber 20a and an intermediate annular air-mixing chamber 20b are defined between the inner annular flame cover 2 and the burner 1, and the intermediate annular air-mixing chamber 20b is disposed around the outer periphery of the inner annular air-mixing chamber 20 a.

Referring to fig. 1 to 6, in some embodiments, an inner ring injection pipe 11 is protruding from the outer peripheral wall of the burner 1, and one end of the inner ring injection pipe 11 is connected to the outer wall of the burner 1 and is connected to an inner ring air mixing chamber 20a in the burner 1. The other end of the inner ring injection pipe 11 is arranged in a protruding and extending way towards the external direction of the furnace end 1 and is used for externally connecting a fuel gas source. The external fuel gas can supply fuel gas to the inner ring mixing cavity 20a through the inner ring injection pipe 11, and meanwhile, the external air can enter the inner ring injection pipe 11 through the outer end of the inner ring injection pipe 11 and enter the inner ring mixing cavity 20a together with the fuel gas for mixing, so that primary air supplement of the fuel gas in the inner ring mixing cavity 20a is realized.

In some embodiments, the peripheral wall of the burner 1 is convexly provided with a middle ring injection pipe 12, and one end of the middle ring injection pipe 12 is connected with the outer wall of the burner 1 and is communicated with a middle ring mixing cavity 20b in the burner 1. The other end of the middle ring injection pipe 12 is arranged in a protruding and extending way towards the external direction of the furnace end 1 and is used for externally connecting a fuel gas source. The outside gas can be through the middle ring ejector pipe 12 to the middle ring mixing cavity 20b provide the gas, simultaneously, outside air can be through the outer end of middle ring ejector pipe 12 entering middle ring ejector pipe 12 to mix in the middle ring mixing cavity 20b with the gas, realize the primary air replenishment to the gas in the middle ring mixing cavity 20 b.

Referring to fig. 4 to 7, in some embodiments, an inner ring fire hole 21 communicating with the inner ring air mixing chamber 20a is provided on the top surface of the inner ring fire cover 2, and an intermediate ring fire hole 22 communicating with the intermediate ring air mixing chamber 20b is provided on the outer peripheral wall of the inner ring fire cover 2. The fuel gas in the inner ring mixed gas chamber 20a can flow out of the inner ring mixed gas chamber 20a through the inner ring flame holes 21 and burn, thereby forming an inner ring flame. The fuel gas in the middle ring gas mixing chamber 20b can flow out of the middle ring gas mixing chamber 20b through the middle ring flame holes 22 and burn, thereby forming a middle ring flame, which is circumferentially arranged on the circumferential side of the inner ring flame.

Fig. 8 is a schematic view of the structure of the outer ring fire cover 3 in fig. 2. Fig. 9 is a top view of fig. 8. Fig. 10 is a cross-sectional view taken along the direction C-C in fig. 9.

Referring to fig. 4 to 10, in some embodiments, when the outer ring fire cover 3 is disposed on the peripheral area of the top of the burner 1, an outer ring air mixing cavity 30 is defined between the outer ring fire cover 3 and the burner 1. The outer ring fire cover 3 is ring-shaped, and the outer ring fire cover 3 is circumferentially arranged around the outer circumference of the inner ring fire cover 2 at intervals.

Referring to fig. 1 to 6, in some embodiments, an outer ring injection pipe 13 is protruding from the outer peripheral wall of the burner 1, and one end of the outer ring injection pipe 13 is connected to the outer wall of the burner 1 and is connected to an outer ring air mixing chamber 30 in the burner 1. The other end of the outer ring injection pipe 13 is arranged in a protruding and extending way towards the external direction of the furnace end 1 and is used for externally connecting a fuel gas source. The external gas can provide gas to the outer ring mixing cavity 30 through the outer ring injection pipe 13, and meanwhile, the external air can enter the outer ring injection pipe 13 through the outer end of the outer ring injection pipe 13 and enter the outer ring mixing cavity 30 together with the gas for mixing, so that primary air supplement of the gas in the outer ring mixing cavity 30 is realized.

Referring to fig. 4 to 10, in some embodiments, a first outer ring fire hole 31 is provided on a circumferential side wall of the outer ring fire cover 3 facing the inner ring fire cover 2, and the first outer ring fire hole 31 is provided on an inner side wall of the outer ring fire cover 3. The fuel gas in the outer ring gas mixing chamber 30 can flow out of the outer ring gas mixing chamber 30 through the first outer ring flame holes 31 and burn, thereby forming a first outer ring flame.

Referring to fig. 1-7, in some embodiments, the spaced area between the outer ring fire cover 3 and the inner ring fire cover 2 forms a plenum chamber 10. The first outer annular fire hole 31 of the outer annular fire cover 3 and the middle annular fire hole 22 of the inner annular fire cover 2 can be communicated with the air supplementing cavity 10, so that the air supplementing cavity 10 can supplement air for the first outer annular fire hole 31 and the middle annular fire hole 22 secondarily.

In some embodiments, the peripheral wall of the burner 1 is provided with an air-filling hole 14 communicated with the air-filling cavity 10, the outer end of the air-filling hole 14 is communicated with the external space of the burner 1, and the inner end of the air-filling hole 14 is communicated with the air-filling cavity 10. Therefore, the air outside the burner can flow into the air-supplementing chamber 10 through the air-supplementing hole 14.

In some embodiments, the plurality of air-filling holes 14 are provided, and the plurality of air-filling holes 14 are circumferentially arranged on the peripheral wall of the burner 1 at intervals, and the number of air-filling holes 14 can be adjusted according to the needs, which is not limited herein.

Referring to fig. 9, in some embodiments, the first outer ring fire hole 31 has a swirl fire hole structure, and a first included angle α is formed between a projection of an axis of the first outer ring fire hole 31 on a horizontal plane and a line connecting a center point of the first outer ring fire hole 31 and a center of the inner ring fire cover 2, and the first included angle α is an included angle of 25 to 35 degrees. The flame formed by the first outer ring flame holes 31 on the inner side of the outer ring flame cover 3 is a rotary flame.

Referring to fig. 10, in some embodiments, in a direction toward the center of the outer ring fire cover 3, the first outer ring fire hole 31 extends obliquely upward, that is, one end of the first outer ring fire hole 31, which communicates with the air supplementing chamber 10, is higher than one end of the first outer ring fire hole 31, which communicates with the outer ring air mixing chamber 30, and a second included angle β is formed between the axis of the first outer ring fire hole 31 and the horizontal plane of the inner ring fire cover 2, and the second included angle β is an included angle of 15 to 25 degrees, so that flames formed by the first outer ring fire hole 31 can extend obliquely upward.

Referring to fig. 4 to 10, in some embodiments, the first outer ring fire hole 31 is a circular fire hole, and the cross section of the first outer ring fire hole 31 is circular. The first outer ring fire holes 31 are provided in plurality, the plurality of first outer ring fire holes 31 are divided into a plurality of groups, each group comprises the same number of first outer ring fire holes 31, and the plurality of groups of first outer ring fire holes 31 are circumferentially arranged on the peripheral side wall of the outer ring fire cover 3, which is close to the inner ring fire cover 2, at intervals.

In some embodiments, the number of the first outer ring fire holes 31 of each group is three, and the three first outer ring fire holes 31 are arranged at intervals. It should be noted that, in other embodiments, the number of the first outer ring fire holes 31 in each set may be adjusted according to needs, which is not limited herein.

Referring to fig. 10, in some embodiments, the first outer ring fire holes 31 of each set of first outer ring fire holes 31 are arranged at intervals along a straight line, and a third included angle γ is formed between the connecting line of the first outer ring fire holes 31 of each set of first outer ring fire holes 31 and the horizontal plane of the inner ring fire cover 2, and the third included angle γ is 25 to 35 degrees, which is favorable for secondary air supplement to the first outer ring fire holes 31 of each set of first outer ring fire holes 31 through the air supplementing cavity 10, so that the combustion is more sufficient and the efficiency is higher.

Referring to fig. 4 to 10, in some embodiments, the outer circumferential side wall of the outer ring fire cover 3 is provided with a second outer ring fire hole 32, and a plurality of second outer ring fire holes 32 are provided, and the plurality of second outer ring fire holes 32 are circumferentially spaced on the outer circumferential side wall of the outer ring fire cover 3. The fuel gas in the outer ring gas mixing chamber 30 can flow out of the outer ring gas mixing chamber 30 through the second outer ring flame holes 32 and burn, thereby forming a second outer ring flame.

In some embodiments, the outer circumferential side wall of the outer ring fire cover 3 is further provided with an outer ring fire slit 33, and the outer ring fire slit 33 is annular and circumferentially surrounds the outer circumferential side wall of the outer ring fire cover 3. The second outer ring fire hole 32 is provided on the upper side of the outer ring fire slit 33. The outer ring fire slits 33 are communicated with the outer ring gas mixing cavity 30, and the fuel gas in the outer ring gas mixing cavity 30 can flow out of the outer ring gas mixing cavity 30 through the outer ring fire slits 33 and burn, so that outer ring gap fire is formed, and the outer ring gap fire can improve the flame stability of the second outer ring flame.

Fig. 11 is a schematic view of the inner ring fire cover 2 in fig. 2. Fig. 12 is a front view of fig. 11. Fig. 13 is a bottom view of fig. 12. Fig. 14 is a sectional view taken along the direction D-D in fig. 12. Fig. 15 is a sectional view taken along the direction E-E in fig. 13.

Referring to fig. 11 to 15, and referring to fig. 2 to 7, in some embodiments, a top cover 4 is protruded from the center of the top surface of the inner ring fire cover 2, the top cover 4 covers the top of the inner ring fire hole 21, and an inner ring fire slit 41 is provided between the peripheral edge of the top cover 4 and the top surface of the inner ring fire cover 2. The inner ring fire slit 41 is annular and circumferentially surrounds the outer peripheral edge of the top cover 4, and the inner ring air mixing chamber 20a can communicate with the inner ring fire slit 41 through the inner ring fire hole 21. Accordingly, the fuel gas in the inner ring gas mixture chamber 20a can flow to the inner ring flame gap 41 through the inner ring flame holes 21 to burn, and further, an inner ring gap flame is formed on the circumferential side of the top cover 4.

Referring to fig. 11 to 15, in some embodiments, the top cover 4 is spaced from the top surface of the inner ring fire cover 2, and an inner ring fire slit 41 is formed between the peripheral edge of the top cover 4 and the top surface of the inner ring fire cover 2. The center of the top surface of the inner ring fire cover 2 is convexly provided with a supporting column 42 extending upwards, and the top of the supporting column 42 is integrally connected with the bottom surface of the top cover 4, namely the top cover 4 is arranged at the top of the supporting column 42. The top cover 4 is connected with the top of the inner ring fire cover 2 through the supporting columns 42, so that the top cover 4 and the top surface of the inner ring fire cover 2 are arranged at intervals.

In some embodiments, the inner ring fire holes 21 are provided in plurality, and the plurality of inner ring fire holes 21 are circumferentially arranged around the outer circumference of the support column 42. The peripheral side edge of the top cover 4 protrudes out of the peripheral wall of the support column 42 so as to cover the top of the inner ring fire hole 21.

In some embodiments, the top cover 4 has a diameter of 18-26 mm and a thickness of 2-3mm. The support column 42 has a diameter of 4-6mm. The structural strength of the top cover 4 and the supporting columns 42 can be ensured, deformation and damage are not easy to occur in processing or transportation, the passage area between the inner ring fire holes 21 and the inner ring fire slits 41 can be ensured, and the resistance in the gas flowing process can be reduced.

Referring to fig. 11 to 15, in some embodiments, the inner ring fire holes 21 are located at the top of the inner ring air mixing chamber 20a, and a plurality of inner ring fire holes 21 are circumferentially uniformly spaced around at the circumferential side edge of the top of the inner ring air mixing chamber 20 a. Therefore, the fuel gas in the inner ring gas mixing chamber 20a can be uniformly supplied to the annular inner ring flame gap 41 through the plurality of inner ring flame holes 21 for combustion, and the stability of the inner ring gap flame is improved.

Referring to fig. 11 to 15, in some embodiments, a fire transfer slit 23 is provided on the inner ring fire cover 2, and the fire transfer slit 23 communicates with the inner ring air mixing chamber 20a. The fire passing slits 23 are exposed on the top surface of the inner ring fire cover 2, and the fire passing slits 23 are arranged in a radial outward extending manner. The inner ends of the fire transfer slits 23 are arranged to extend in the direction of the inner ring fire slits 41, and the outer ends of the fire transfer slits 23 are exposed to the outer peripheral wall of the inner ring fire cover 2. Thus, the gas at the inner ring slit 41 can be ignited by the flame passing slit 23, thereby igniting the inner ring slit flame.

In some embodiments, the inner end of the fire passing slit 23 may extend to the peripheral edge of the top cover 4, or the inner end of the fire passing slit 23 and the peripheral edge of the top cover 4 are arranged at intervals, and the interval width is smaller than 3mm, so that smooth fire passing between the fire passing slit 23 and the inner ring fire slit 41 can be ensured.

Referring to fig. 11 to 15, in some embodiments, a flame transfer channel 24 is provided between the top of the inner ring air mixing chamber 20a and the flame transfer slit 23, and the flame transfer channel 24 extends radially outward from the top of the inner ring air mixing chamber 20a to the outer peripheral wall of the inner ring flame cover 2. The part of the fire passing slits 23 positioned at the top surface of the inner ring fire cover 2 is communicated with the top area of the fire passing channel 24, the part of the fire passing slits 23 positioned on the peripheral wall of the inner ring fire cover 2 is communicated with the outer end area of the fire passing channel 24, and the inner end area of the fire passing channel 24 is communicated with the top of the inner ring mixed air cavity 20 a.

Referring to fig. 4 to 5, in some embodiments, thermocouples 15 are arranged at intervals on the outer peripheral side of the fire passing slit 23. Accordingly, a part of the fuel gas in the inner ring gas mixing chamber 20a can be burned at the flame transfer slit 23 through the flame transfer passage 24, and the part of the flame always burns the thermocouple 15 so that when only the inner ring flame is present, the inner ring flame is not extinguished at the time of the combustion of the minute flame.

Referring to fig. 11 to 15, in some embodiments, a fire transfer hole 231 is formed at the fire transfer slit 23, and the fire transfer hole 231 communicates with the inner ring air mixing chamber 20a and the outer space of the inner ring fire cover 2. The fire passing holes 231 may expand the width of the fire passing slits 23 so that flame combustion at the fire passing slits 23 is more stable.

In some embodiments, the fire passing holes 231 are provided in plurality, and the plurality of fire passing holes 231 are arranged at the fire passing slits 23 at intervals. The number of the fire passing holes 231 may be adjusted as needed, and is not limited herein.

Referring to fig. 11 to 15, in some embodiments, a plurality of middle fire holes 22 are provided on the circumferential side wall of the inner ring fire cover 2, and the plurality of middle fire holes 22 are circumferentially arranged on the circumferential side wall of the inner ring fire cover 2 at intervals. And the flame propagation slits 23 are arranged on the peripheral side wall of the inner ring flame cover 2 at circumferential intervals from the middle ring flame holes 22.

In some embodiments, the peripheral side wall of the inner ring fire cover 2 is provided with a middle ring fire slit 25, the middle ring fire slit 25 is annularly and circumferentially arranged on the peripheral side wall of the inner ring fire cover 2, and the middle ring fire slit 25 is communicated with the middle ring mixing cavity 20b. The plurality of middle ring fire holes 22 are all arranged on the upper side of the middle ring fire slit 25, and the fire passing slit 23 is communicated with the middle ring fire slit 25. Therefore, the fuel gas in the middle ring gas mixing chamber 20b can flow out through the middle ring flame slit 25 and burn, thereby forming a middle ring slit flame, which surrounds the outer circumference of the flame arranged at the middle ring flame hole 22, and thus the stability of the middle ring flame can be improved.

Referring to fig. 11-15, in some embodiments, the middle ring fire slit 25 communicates with the transfer slit 23. Specifically, on the peripheral side wall of the inner ring fire cover 2, the lower end of the fire transfer slit 23 extends to the middle ring fire slit 25. Therefore, the inner ring flame and the middle ring flame can mutually transmit fire through the fire transmission seam 23, and the ignition is convenient.

Fig. 16 is a schematic view of another embodiment of the inner ring fire cover 2 of fig. 11. Fig. 17 is a front view of fig. 16. Fig. 18 is a bottom view of fig. 17. Fig. 19 is a cross-sectional view in the direction F-F of fig. 17. Fig. 20 is a sectional view taken in the direction G-G of fig. 18.

Referring to fig. 16 to 20, and referring to fig. 2 to 7, the inner ring fire cover 2 of the present embodiment is substantially identical to the inner ring fire cover 2 of the embodiment of fig. 11 to 15, except for the difference between the structures of the support columns 42 and the inner ring fire holes 21.

Referring to fig. 16 to 20, in the present embodiment, the diameter of the support column 42 is larger, and the diameter width of the support column 42 is substantially the same as the width of the top of the inner ring air mixing chamber 20 a. Meanwhile, the inner ring fire holes 21 are densely distributed on the outer periphery of the support column 42, and the inner ring fire holes 21 are located at the peripheral side edge of the top of the inner ring air mixing chamber 20a and extend obliquely upward toward the outside to the outer periphery of the support column 42.

For example, the top cover 4 has a diameter of 18-20mm and the support posts 42 have a diameter of 8-12mm. By enlarging the diameter of the support column 42 and reducing the aperture of the inner ring fire holes 21, the inner ring fire holes 21 can be densely distributed on the periphery of the support column 42, the path of the inner ring gap fire is shortened, and stable combustion can be ensured when the inner ring gap flame burns with very little fire.

Fig. 21 is a schematic structural view of still another embodiment of the inner ring fire cover 2 of fig. 11. Fig. 22 is a front view of fig. 21. Fig. 23 is a bottom view of fig. 22. Fig. 24 is a sectional view in the direction H-H of fig. 22. Fig. 25 is a sectional view in the direction I-I of fig. 23.

Referring to fig. 21 to 25, and referring to fig. 2 to 7, the inner ring fire cover 2 in the present embodiment has substantially the same structure as the inner ring fire cover 2 in the embodiment of fig. 11 to 15, except that the connection structure between the top cover 4 and the top of the inner ring fire cover 2 is different, i.e. the structures of the support columns 42 are different, and the structures of the inner ring fire holes 21 are different.

Referring to fig. 21 to 25, in the present embodiment, there is only one inner ring fire hole 21, the inner ring fire hole 21 is provided at the top center of the inner ring fire cover 2, and the inner ring fire hole 21 is provided at the top center of the inner ring air mixing chamber 20 a. Meanwhile, the support column 42 is arranged at the peripheral edge of the inner ring fire hole 21, the bottom end of the support column 42 is connected with the peripheral edge of the inner ring fire hole 21, and the top end of the support column 42 is connected with the bottom surface of the top cover 4. In this embodiment, the inner ring flame holes 21 have larger aperture, which is convenient for processing, and can improve the gas circulation speed between the inner ring gas mixing cavity 20a and the inner ring flame gap 41, and ensure the combustion stability of the inner ring flame.

In some embodiments, the support columns 42 are provided in plurality, and the plurality of support columns 42 are circumferentially arranged at intervals at the circumferential side edges of the inner ring fire holes 21. The inner ring fire holes 21 can be communicated with the inner ring fire slits 41 through gaps between the adjacent inner ring support columns 42, so that the fuel gas in the inner ring gas mixing cavity 20a can flow to the inner ring fire slits 41 for burning sequentially through the inner ring fire holes 21 and the gaps between the adjacent support columns 42, and then inner ring slit flames are formed. In addition, the top cover 4 may be supported on the top surface of the inner ring fire cover 2 by a plurality of support columns 42, providing structural strength to the top cover 4 and the support columns 42.

Fig. 26 is a schematic structural view of still another embodiment of the inner ring fire cover 2 of fig. 11. Fig. 27 is a front view of fig. 26. Fig. 28 is a bottom view of fig. 27. Fig. 29 is a sectional view in the J-J direction of fig. 27. Fig. 30 is a sectional view in the direction K-K in fig. 28.

Referring to fig. 26 to 30, and referring to fig. 2 to 7, the inner ring fire cover 2 of the present embodiment is substantially similar to the inner ring fire cover 2 of the embodiment of fig. 21 to 25, except that the connection structure between the top cover 4 and the top of the inner ring fire cover 2 is different, and the structures of the inner ring fire holes 21 are different.

Referring to fig. 26 to 30, in the present embodiment, only one inner ring fire hole 21 is provided and is disposed at the center of the top surface of the inner ring fire cover 2, and no support post 42 is disposed between the top cover 4 and the top surface of the inner ring fire cover 2. The outer periphery of the top cover 4 is provided with a supporting wall 43 extending downward, the lower end of the supporting wall 43 is connected with the top surface of the inner ring fire cover 2, and the supporting wall 43 is annular and circumferentially surrounds the periphery side of the inner ring fire hole 21. Thus, the top cover 4 may be supported above the top surface of the top surface by the support wall 43.

In the present embodiment, the inner ring fire slits 41 are formed in the support wall 43, and the inner ring fire slits 41 are arc-shaped and extend in the circumferential direction of the support wall 43. The arcuate inner annular flame gap 41 is provided in plurality, and the plurality of inner annular flame gaps 41 are circumferentially arranged circumferentially at intervals on the support wall 43. The fuel gas in the inner ring gas mixing cavity 20a can flow to the inner ring flame gaps 41 for combustion, and each inner ring flame gap 41 forms a gap flame, so that the flames out of the inner ring flame gaps 41 are combined to form an annular inner ring gap flame.

Referring to fig. 26-30, in some embodiments, the inner annular fire seam 41 has a flare shape with a progressively larger width in a direction radially outward from the top cover 4. The gap fire hole can enable the inner ring to burn stably with very little fire, and effectively prevent the phenomenon of flame separation or tempering. Specifically, when the gas in the inner ring gas mixing chamber 20a flows out of the inner ring flame slit 41, the area is gradually increased along the outflow direction, the flow velocity of the gas is reduced, the occurrence of the flame separation phenomenon can be prevented, and when the pressure in the gas pipe is too low, the flame at the inner ring flame slit 41 moves along the gas outflow reverse direction, the area is gradually reduced in the direction, the resistance of the flame movement is gradually increased, and the occurrence of the flashback phenomenon when the flame enters the combustor is reduced. Therefore, the bell mouth-shaped inner ring gap fire hole structure can realize stable combustion of extremely small fire flames. In addition, the inner annular fire slit 41 can be formed by horizontally cutting a circular saw blade, and the processing is convenient.

In some embodiments, the support wall 43 is provided with two inner annular flame stitches 41, each inner annular flame stitch 41 comprising a plurality of circumferentially spaced circumferentially arranged inner annular flame stitches 41. The inner annular flame slits 41 of the upper and lower inner annular flame slits 41 are alternately arranged in sequence, so that when the fuel gas burns at the inner annular flame slits 41 of the upper and lower inner layers, the fuel gas can be sequentially combined to form annular inner annular flame.

It should be noted that, in other embodiments, the inner ring fire seam 41 may be provided with multiple layers, and the number of layers of the inner ring fire seam 41 may be adjusted according to the need, which is not limited herein.

Referring to fig. 26 to 30, in some embodiments, between two adjacent inner annular flame slits 41, the inner annular flame slits 41 located at the upper layer and the inner annular flame slits 41 located at the lower layer are partially overlapped, so as to ensure that flames between the inner annular flame slits 41 can be connected to each other, and thus, flames can be stabilized to each other.

In some embodiments, the width of the overlapping part between the upper and lower inner ring fire slits 41 is 2 to 5mm, so that the effect of mutually stabilizing flame can be ensured, and the inner ring fire slits 41 are not blurred due to too close distance.

Based on the structures of the burner and the inner ring fire cover in the embodiments, the embodiment of the invention also provides a gas stove, which mainly comprises a shell and the burner, wherein the shell is of a container structure with a hollow inside, and the outer part of the shell forms the outer shell of the gas stove. The interior space of the housing forms a mounting cavity for providing a mounting space for the burner. The burner adopts the structure of the burner in each embodiment, the burner is arranged in the installation cavity, the top of the burner protrudes out of the top surface of the shell, so that the cooker is erected above the burner and is heated by the burner, and the cooking function is further realized.

Based on the technical scheme, the embodiment of the invention has at least the following advantages and positive effects:

In the burner provided by the embodiment of the invention, the top of the burner 1 is provided with the inner ring fire cover 2 and the outer ring fire cover 3 which are arranged at intervals, wherein an inner ring mixed air cavity 20a and an intermediate ring mixed air cavity 20b are formed between the inner ring fire cover 2 and the burner 1, an outer ring mixed air cavity 30 is formed between the outer ring fire cover 3 and the burner 1, the inner ring mixed air cavity 20a is communicated by utilizing the inner ring fire holes 21 on the top surface of the inner ring fire cover 2, the intermediate ring fire can be formed by utilizing the intermediate ring fire holes 22 on the peripheral side wall of the inner ring fire cover 2 to be communicated with the intermediate ring mixed air cavity 20b, meanwhile, the top cover 4 protruding on the top surface of the inner ring fire cover 2 is covered above the top of the inner ring fire holes 21, and the inner ring fire slits 41 between the outer peripheral edge of the top cover 4 and the top surface of the inner ring fire cover 2 are utilized to be communicated with the inner ring fire holes 21, and fuel gas in the inner ring mixed air cavity 20a can be combusted at the inner ring fire slits 41 to form inner ring fire slits, and the inner ring fire flame interconnection is good, so that the burner can be favorable for improving the combustion stability under the low-temperature combustion and low-flame combustion stability, and the requirement of the low-flame combustion slit can be met.

While the invention has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (17)

1. A burner for a gas turbine, which burner comprises a burner body, characterized by comprising the following steps:

a burner;

the inner ring fire cover is covered on the central area of the top of the furnace end, an inner ring mixing air cavity and an intermediate ring mixing air cavity are formed between the inner ring fire cover and the furnace end in a surrounding manner, and the intermediate ring mixing air cavity is arranged on the periphery of the inner ring mixing air cavity in a surrounding manner;

the outer ring fire cover is covered on a peripheral side area of the top of the furnace end, the outer ring fire cover is arranged around the periphery of the inner ring fire cover at intervals, and an outer ring air mixing cavity is formed between the outer ring fire cover and the furnace end in a surrounding mode;

Wherein, the top center of the inner ring fire cover is convexly provided with a top cover, and the top cover covers the top of the inner ring fire hole;

An inner ring fire seam is arranged between the peripheral edge of the top cover and the top surface of the inner ring fire cover, and the inner ring fire hole is communicated with the inner ring fire seam.

2. The burner of claim 1, wherein the top cover is spaced from a top surface of the inner annular fire cover, and the inner annular fire seam is formed between a peripheral side edge of the top cover and the top surface of the inner annular fire cover.

3. The burner of claim 2 wherein the top center of the inner annular fire cover is provided with a support column extending upwards, and the top cover is arranged on the top of the support column;

The inner ring fire holes are arranged in a plurality, and the inner ring fire holes are circumferentially arranged on the periphery of the support column.

4. A burner as claimed in claim 3, wherein a plurality of said inner ring fire holes are circumferentially arranged at the peripheral edge of the top of said inner ring mixing chamber.

5. The burner of claim 2 wherein said inner annular fire hole is centrally located in the top surface of said inner annular fire cover;

a support column is arranged between the top cover and the top surface of the inner ring fire cover, the bottom end of the support column is connected with the peripheral edge of the inner ring fire hole, and the top end of the support column is connected with the bottom surface of the top cover;

The support columns are arranged in a plurality, and the support columns are circumferentially arranged at intervals on the circumferential side of the inner ring fire hole;

The inner ring fire holes are communicated with the inner ring fire slits through gaps between adjacent support columns.

6. The burner of claim 1, wherein the outer periphery of the top cover is provided with a supporting wall extending downwards, the lower end of the supporting wall is connected with the top surface of the inner ring fire cover, the supporting wall is annular and circumferentially surrounds the periphery of the inner ring fire hole, and the inner ring fire slit is formed in the supporting wall.

7. The burner of claim 6 wherein said inner annular flame gap is arcuate, a plurality of said inner annular flame gaps being provided, a plurality of said inner annular flame gaps being circumferentially spaced around said support wall.

8. The burner of claim 7 wherein said inner annular seam has a flare shape of progressively greater width in a direction radially outward from said top cover.

9. The burner of claim 7 wherein said support wall is provided with a plurality of layers of said inner annular flame envelope, each layer of said inner annular flame envelope including a plurality of circumferentially spaced circumferentially arranged said inner annular flame envelope;

And the inner ring fire slits positioned on the upper layer and the inner ring fire slits positioned on the lower layer are arranged in a partially overlapped mode between the two adjacent layers of the inner ring fire slits.

10. The burner of claim 1, wherein the inner annular fire cover is provided with fire transfer slits which are communicated with the inner annular mixing cavity;

the fire transmission seam is exposed out of the top surface of the inner ring fire cover, and the inner end of the fire transmission seam extends towards the direction of the inner ring fire seam;

The outer end of the fire transmission slit is exposed out of the outer peripheral wall of the inner ring fire cover, and thermocouples are arranged on the outer peripheral side of the fire transmission slit at intervals.

11. The burner of claim 10, wherein a spacing between an inner end of the pass-through slit and the inner ring slit is less than 3mm.

12. The burner of claim 10, wherein a middle ring fire seam is formed in the peripheral side wall of the inner ring fire cover, the middle ring fire seam is communicated with the middle ring mixing cavity, the middle ring fire hole is formed in the upper side of the middle ring fire seam, and the fire transfer seam is communicated with the middle ring fire seam.

13. The burner of claim 1, wherein a gas-filling cavity is formed between the inner annular fire cover and the outer annular fire cover, and a gas-filling hole communicating with the gas-filling cavity is formed in the outer peripheral wall of the burner.

14. The burner of claim 1, wherein a first outer ring fire hole with a circular cross section is arranged on a peripheral side wall of the outer ring fire cover, which is close to the inner ring fire cover, a plurality of first outer ring fire holes are arranged, the plurality of first outer ring fire holes are divided into a plurality of groups, and the plurality of groups of first outer ring fire holes are circumferentially arranged on the peripheral side wall of the outer ring fire cover, which is close to the inner ring fire cover, at intervals;

And an included angle of 25-35 degrees is formed between the connecting line of the plurality of first outer ring fire holes of each group of first outer ring fire holes and the horizontal plane of the inner ring fire cover.

15. The burner of claim 14, wherein the axis of the first outer annular fire hole forms an included angle of 15-25 degrees with the horizontal plane of the inner annular fire cover;

The projection of the first outer ring fire hole on the horizontal plane of the inner ring fire cover forms an included angle of 25-35 degrees with the connecting line between the center point of the first outer ring fire hole and the center of the inner ring fire cover.

16. The burner of claim 14 wherein a plurality of circumferentially spaced apart second outer ring fire holes are provided in the outer peripheral sidewall of the outer ring fire cover.

17. A gas range comprising a burner as claimed in any one of claims 1 to 16.