CN217464419U - Combustor and gas stove - Google Patents

Abstract

The application relates to the technical field of gas cookers and discloses a combustor and a gas stove. The burner includes: the inner fire cover defines an inner air mixing chamber and is provided with an inner fire hole communicated with the inner air mixing chamber; the middle fire cover is sleeved outside the inner fire cover, the middle fire cover defines a middle ring gas mixing chamber, a middle ring inner fire hole and a middle ring outer fire hole which are communicated with the middle ring gas mixing chamber are formed in the middle fire cover, and the middle ring outer fire hole is positioned outside the middle ring inner fire hole; the outer fire cover is sleeved outside the middle fire cover, the outer fire cover defines an outer ring gas mixing chamber, the outer fire cover is provided with an outer ring inner fire hole and an outer ring outer fire hole which are communicated with the outer ring gas mixing chamber, and the outer ring outer fire hole is positioned outside the outer ring inner fire hole; the ignition needle is located between the middle fire cover and the outer fire cover and used for igniting the middle ring outer fire hole, after the middle ring outer fire hole is ignited, flame at the middle ring outer fire hole can be sequentially transmitted to the middle ring inner fire hole and the inner fire hole, and flame at the middle ring outer fire hole can also be sequentially transmitted to the outer ring inner fire hole and the outer ring outer fire hole.

Description

Combustor and gas stove

Technical Field

The application relates to the technical field of gas cookers, for example to a combustor and a gas stove.

Background

Nowadays, a gas stove is popularized to kitchen environments of thousands of households as a convenient and fast cooking appliance, and a burner of the gas stove can utilize gas fuels such as liquefied petroleum gas, artificial gas, natural gas and the like to perform direct-fire heating, so that a cooking pot can be rapidly heated.

In the related art, there is provided a gas range, a burner including: the first ignition needle is formed between the middle fire cover and the outer fire cover; the second ignition needle is formed between the middle fire cover and the outer fire cover; the first thermocouple is formed between the inner fire cover and the middle fire cover; and the second thermocouple is formed between the middle fire cover and the outer fire cover.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

in the related art, the combustor needs two ignition needles to realize the ignition of three fire covers, and the manufacturing cost of the combustor is increased.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a combustor and a gas stove, so as to reduce the manufacturing cost of the combustor.

According to a first aspect of the embodiments of the present invention, there is provided a burner, the burner comprising: the inner fire cover defines an inner air mixing chamber and is provided with an inner fire hole communicated with the inner air mixing chamber; the middle fire cover is sleeved on the outer side of the inner fire cover, the middle fire cover defines a middle ring gas mixing chamber, a middle ring inner fire hole and a middle ring outer fire hole which are communicated with the middle ring gas mixing chamber are formed in the middle fire cover, and the middle ring outer fire hole is positioned on the outer side of the middle ring inner fire hole; the outer fire cover is sleeved outside the middle fire cover, an outer ring gas mixing chamber is defined by the outer fire cover, an outer ring inner fire hole and an outer ring outer fire hole which are communicated with the outer ring gas mixing chamber are formed in the outer fire cover, and the outer ring outer fire hole is positioned outside the outer ring inner fire hole; the ignition needle is positioned between the middle fire cover and the outer fire cover and used for igniting the middle ring outer fire hole, after the middle ring outer fire hole is ignited, the flame at the middle ring outer fire hole can be sequentially transmitted to the middle ring inner fire hole and the inner fire hole, and the flame at the middle ring outer fire hole can also be sequentially transmitted to the outer ring inner fire hole and the outer ring outer fire hole.

According to a second aspect of the embodiments of the present invention, there is provided a gas stove, comprising the above burner.

The combustor and the gas stove provided by the embodiment of the disclosure can realize the following technical effects:

the ignition needle is located between the middle fire cover and the outer fire cover, and after the ignition needle ignites the outer fire hole of the middle ring, the ignition needle can simultaneously transmit to the inner fire hole of the outer ring and the inner fire hole of the middle ring, the inner fire hole of the outer ring transmits to the outer fire hole of the outer ring, and the inner fire hole of the middle ring can transmit to the inner fire hole. Therefore, the ignition of the three fire covers can be realized through one ignition needle, and the five-ring fire form is formed. The combustor of the embodiment of the disclosure reduces the number of ignition needles, reduces the assembly difficulty of the combustor, and can reduce the manufacturing cost of the combustor.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic view of a combustor configured in accordance with an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an exploded view of a gas panel according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of an assembly structure of a gas distribution plate according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a lower air distribution plate provided in the embodiments of the present disclosure;

FIG. 5 is a schematic structural view of a perspective of a fire lid (middle fire lid) provided by embodiments of the present disclosure;

FIG. 6 is a schematic structural view of another perspective of a fire lid (middle fire lid) provided by embodiments of the present disclosure;

FIG. 7 is a schematic structural view of another perspective of a fire lid (middle fire lid) provided by embodiments of the present disclosure;

FIG. 8 is a schematic structural view of another perspective of a fire lid (middle fire lid) provided by embodiments of the present disclosure;

FIG. 9 is an enlarged schematic view of portion A of FIG. 8;

FIG. 10 is a schematic cross-sectional view of a fire lid assembly according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural view of another fire cover (outer fire cover) provided by the embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of a burner provided in an embodiment of the present disclosure;

FIG. 13 is a schematic structural view of an inner fire cover according to an embodiment of the present disclosure;

FIG. 14 is a schematic cross-sectional view of a fire lid (middle fire lid) according to an embodiment of the present disclosure;

FIG. 15 is a schematic cross-sectional view of another fire lid (outer fire lid) according to an embodiment of the present disclosure;

FIG. 16 is a schematic cross-sectional view of a fire lid (middle fire lid) according to an embodiment of the present disclosure;

FIG. 17 is a schematic cross-sectional view of a combustor provided in accordance with embodiments of the present disclosure;

FIG. 18 is a schematic cross-sectional view of a combustor according to an embodiment of the present disclosure.

Reference numerals:

10. a gas distribution disc; 101. a lower gas distribution plate; 102. a gas distribution channel; 1021. a first gas distribution channel; 1022. a second gas distribution channel; 1023. a bottom wall of the second gas distribution passage; 1024. a third air distribution channel; 1025. a bottom wall of the third gas distribution channel; 103. an air inlet; 1031. a first air inlet; 1032. a second air inlet; 104. an air intake passage; 105. a secondary air passage; 1051. a first secondary air passage; 1052. a second secondary air passage; 106. an upper air distribution sheet; 1061. An air outlet channel; 1062. an air outlet; 1063. a grid; 107. a connection fitting portion; 1071. a first screw hole; 1072. a second screw hole; 20. an outer fire cover; 201. an outer ring air mixing chamber; 2011. an outer ring outer fire hole; 2012. an inner fire hole of the outer ring; 2013. an outer ring outer flame stabilizing slot; 2014. an outer ring inner flame stabilizing groove; 202. a second fire transfer slot; 2021. a third fire transfer hole; 2022. a fourth fire transfer hole; 2023. a second flow homogenizing hole; 203. a second inner side wall; 204. a second outer sidewall; 205. a second top wall; 30. a middle fire cover; 301. a middle ring gas mixing chamber; 3011. an inner fire hole of the middle ring; 3012. a middle ring outer fire hole; 3013. a middle ring flame stabilizing groove; 302. a first fire transfer slot; 3021. a first fire transfer port; 3022. a second fire transfer hole; 303. a first inner side wall; 304. a first outer side wall; 305. a first top wall; 40. an inner fire cover; 401. an inner air mixing chamber; 402. an inner fire hole; 403. a nose-shaped projection; 404. grooving; 4041. a thermocouple hole; 405. a thermocouple; 406. an inner ring flame stabilizing groove; 50. a fire cover; 501. a gas mixing chamber; 5011. an outer fire hole; 5012. an inner fire hole; 5013. a fire hole group; 5014. a main fire hole; 5015. a flame stabilizing hole; 50151. a first fire outlet; 50152. a second fire outlet; 5016. a flame stabilizing groove; 502. a fire cover body; 5021. an inner sidewall; 5022. an outer sidewall; 5023. a top wall; 5024. a groove part; 5025. A boss portion; 5026. avoiding the channel; 503. connecting ribs; 504. reinforcing ribs; 5041. a first reinforcing rib; 5042. a second reinforcing rib; 505. a connecting portion; 5051. a third screw hole; 506. a protrusion; 507. a first fire cover; 5071. a first fire hole; 5072. a third fire hole; 508. a second fire cover; 5081. a second fire hole; 5082. a fourth fire hole; 509. a third fire cover; 5091. a fifth fire hole; 60. an ignition needle; 601. an ignition cap; 602. an ignition hole; 603. a second avoidance slot; 70. a secondary air flow path; 701. a first secondary air flow path; 702. a second secondary air flow path; 703. a fuel gas flow channel; 80. a furnace end; 801. a first side wall; 802. a second side wall; 803. a first avoidance slot; 804. an outer ring air mixing cavity; 805. an inner ring air mixing cavity; 90. an injection pipe; 100. a burner.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure may be understood as specific cases by those of ordinary skill in the art.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more, unless otherwise specified.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

In fig. 17, thick arrows indicate the flowing direction of the gas in the second and third air dividing passages 1022 and 1024, thin arrows indicate the flowing direction of the gas in the first air dividing passage 1021, and arrows indicate the flowing direction of the gas flow in the secondary air flow passage 70 in fig. 18.

Referring to fig. 1 to 18, an embodiment of the present disclosure provides a burner 100, where the burner 100 includes a fire cover 50, a gas distribution plate 10, a furnace end 80, an injection pipe 90, and an air door plate. One optional assembling mode is that the air distribution disc 10 is arranged between the burner 80 and the fire cover 50, and the other end of the burner 80 is communicated with the injection pipe 90. The burner 80 guides the gas flowing out from the injection pipe 90 or the air-fuel mixture of the gas and the primary air (hereinafter, collectively referred to as gas) to the gas distribution plate 10, the gas distribution plate 10 distributes the gas flow flowing out from the burner 80 and transmits the gas flow to the corresponding fire cover 50, and finally the gas is ignited at the fire hole of the fire cover 50 to form flame.

The number of the fire covers 50 is two or more, each fire cover 50 is annular, and different fire covers 50 are concentrically arranged and are sequentially sleeved from inside to outside. Each fire cover 50 all is equipped with the fire hole, and a plurality of fire holes set up along the circumference of the fire cover 50 that corresponds interval in proper order. Such that the plurality of fire holes of each fire cover 50 can form a ring-shaped flame. Each annular flame can heat the container such as a pot at the corresponding loop line position. The number of the fire covers 50 is two or more, so that the heating area and the heating uniformity of the container such as a pot above the fire covers 50 can be improved.

Optionally, the fire covers 50 can define a gas mixing chamber 501, the gas mixing chamber 501 also extends annularly along the circumference of the fire cover 50, the gas mixing chamber 501 of each fire cover 50 can be communicated with the fire hole of the fire cover 50, the gas mixing chamber 501 is communicated with the gas distributor 10, the gas distributed by the gas distributor 10 can flow into the gas mixing chamber 501, and then is sprayed out from the fire hole communicated with the gas mixing chamber 501, and then is combusted at the fire hole to form an annular flame.

In some alternative embodiments, as shown in fig. 1, the number of the fire covers 50 is three, and the three fire covers 50 include an inner fire cover 40, a middle fire cover 30 and an outer fire cover 20 which are sleeved in sequence from inside to outside. In other alternative embodiments, the number of the fire covers 50 may also be two, for example, the fire covers include an inner fire cover 40 and an outer fire cover 20 which are sleeved from inside to outside. It should be noted that: the number of fire lids 50 may also be other numbers.

Optionally, the gas distribution plate 10 defines a gas flow channel 703, and after the gas enters the gas distribution plate 10 through the burner 80, the gas can flow to the corresponding fire cover 50 through the plurality of gas flow channels 703 respectively. The burner 80 has a plurality of mutually independent annular gas mixing chambers, the annular gas mixing chambers are concentrically arranged and are sequentially sleeved from inside to outside, each annular gas mixing chamber is communicated with one or more gas flow channels 703 of the gas distribution plate 10, namely, whether gas supply of each annular gas mixing chamber in the burner 80 is in a state or not can be determined, whether gas supply is available in the corresponding one or more gas flow channels 703 can be respectively determined, and whether flames can be formed by fire covers corresponding to the gas flow channels 703 can be further influenced.

As shown in fig. 2, the gas distribution plate 10 according to the embodiment of the present disclosure includes a lower gas distribution plate 101, the lower gas distribution plate 101 defines a plurality of gas distribution channels 102, and the gas flow channel 703 includes the gas distribution channels 102. The plurality of gas distribution channels 102 are arranged in order in the inside-out direction. The lower gas distribution plate 101 is provided with a gas inlet 103, and the gas inlet 103 is communicated with the burner 80 and the gas distribution channel 102, so that the gas in the burner 80 flows into the gas distribution channel 102 through the gas inlet 103. Wherein at least two gas distribution channels 102 share one gas inlet 103.

With the gas distribution plate 10 of this alternative embodiment, the gas distribution passage 102 is used to distribute the gas flowing in through the burner head 80 to supply gas to different burner caps 50. At least two gas distribution channels 102 share one gas inlet 103, i.e. the gas flowing in via one gas inlet 103 can flow to different gas distribution channels 102. This reduces the number of air inlets 103 compared to the co-annular burner 100, so that the number of parts such as the pilot tube 90, the control valve, etc. that are associated with the distributor plate 10 can also be reduced. Eventually, the size of the burner 100 can be reduced, and the installation of the burner 100 is facilitated.

Optionally, the plurality of gas distribution channels 102 include a second gas distribution channel 1022 and a third gas distribution channel 1024, the second gas distribution channel 1022 and the third gas distribution channel 1024 are both in an annular shape extending along the circumferential direction of the lower gas distribution disk 101, and the third gas distribution channel 1024 is sleeved outside the second gas distribution channel 1022.

In this embodiment, the annular cavity is convenient for the gas to flow along the circumference of gas distribution plate 10, and then can provide the gas for fire lid 50 from circumference, improves the homogeneity of fire lid 50 in the circumference burning.

The lower gas distribution plate 101 further defines an air inlet passage 104, and the air inlet passage 104 extends in the radial direction of the lower gas distribution plate 101 and communicates with the second gas distribution passage 1022 and the third gas distribution passage 1024. The gas inlet 103 includes a first gas inlet 1031, and the first gas inlet 1031 is disposed at one end of the gas inlet passage 104, so that the gas flows into the gas inlet passage 104 through the first gas inlet 1031 and then flows to the second gas distribution passage 1022 and the third gas distribution passage 1024, respectively.

With this alternative embodiment, the second gas distribution passage 1022 and the third gas distribution passage 1024 are annular and are sequentially sleeved in the direction from the inside to the outside. The air inlet passage 104 extends in the radial direction of the lower air distribution plate 101, and means that the air inlet passage 104 extends from the center of the circle (or near the center of the circle) to the outer circumferential direction, or from the outer circumferential direction to the center of the circle (or near the center of the circle). This enables the second branch gas passage 1022 and the third branch gas passage 1024 to communicate with each other, so that the gas can flow into the intake passage 104 through the first gas inlet 1031, and can flow into the second branch gas passage 1022 and the third branch gas passage 1024, respectively, when flowing in the intake passage 104.

Optionally, each air inlet channel 104 corresponds to one air inlet 103, so that each air inlet channel 104 can be communicated with the annular air mixing cavity of the burner 80 through the air inlet 103, the gas enters the air inlet channel 104 through the air inlet 103, the air inlet channel 104 is communicated with at least two adjacent gas distribution channels 102, and finally, the gas can flow in each gas distribution channel 102.

Alternatively, the first air inlet 1031 may be provided at one end of the air intake passage 104 close to the second air dividing passage 1022, that is, the first air inlet 1031 is provided at the inner end of the air intake passage 104. With such an arrangement, since the outer diameter of the burner 80 is generally smaller than the outer diameter of the gas distribution plate 10, the first gas inlet 1031 is disposed at the inner end of the gas inlet passage 104, so that the gas flow in the burner 80 can flow into the gas distribution passage 102 conveniently without increasing the size of the burner 80 or other gas pipelines.

It should be noted that: the first air inlet 1031 may also be disposed at one end of the air intake passage 104 close to the third air dividing passage 1024, that is, the first air inlet 1031 is disposed at the outer end of the air intake passage 104. The gas flows from the outer circumference to the center of the circle, the flow distance of the gas from the gas inlet 103 to the outer circumference can be shortened, and the pressure loss of the gas flowing in the gas inlet passage 104 can be reduced because the outer circumference requires a larger amount of gas.

Optionally, the first air distribution channel 1021 and the second air distribution channel 1022 are adjacently disposed, so that the gas in the air inlet channel 104 can simultaneously flow into the first air distribution channel 1021 and the second air distribution channel 1022, and the resistance of the gas flow is reduced. The length of the air inlet channel 104 is reduced, the processing difficulty is reduced, and the gas is prevented from flowing into other gas distribution channels 102. And the distribution of the gas is convenient for, and the gas can be prevented from being branched too much, so that the gas flow loss is high.

Alternatively, the outlet of the gas distribution channel 102 is communicated with the gas mixing chamber 501 of the fire cover 50, that is, the gas can flow into the gas mixing chamber 501 through the gas distribution channel 102 and then flow out from the fire hole of the fire cover 50 to realize the combustion of the fire cover 50. The number of the gas distribution channels 102 is the same as that of the fire covers 50, and the loop line positions of the gas distribution channels 102 correspond to those of the fire covers 50, so that the gas in each gas distribution channel 102 can be conveyed to the corresponding fire cover 50.

Optionally, the fire cap 50 is provided with an inner fire hole 5012 and an outer fire hole 5011 both communicating with the gas mixing chamber 501, the outer fire hole 5011 being located outside the inner fire hole 5012.

In this embodiment, the inner flame holes 5012 and the outer flame holes 5011 are located in two different circular lines so that the flame cover 50 can form a two-ring flame. Can improve the burning homogeneity of fire lid 50 like this, compare in fire lid 50 only one side and be equipped with the fire hole, the fire lid 50 of this embodiment's heating area is bigger, and is more even, and then has improved the heating effect of fire lid 50 to utensils such as pan. Illustratively, the fire cover 50 includes a plurality of fire covers 50, such as the inner fire cover 40, the outer fire cover 20 and the middle fire cover 30, each fire cover 50 is provided with two circular fire holes inside and outside, so that a large area of uniform heating can be realized, and three fire covers 50 can realize heating in a diameter range of 130mm-150 mm.

In addition, one gas mixing chamber 501 is communicated with one gas distribution channel 102, and one gas mixing chamber 501 is communicated with at least two circular fire holes. That is, in the present embodiment, one gas distribution channel 102 can simultaneously supply gas to the fire holes of two circular lines, and one gas mixing chamber 501 can also simultaneously supply gas to the fire holes of two circular lines. When the fire cover 50 is three fire covers 50, the gas distribution plate 10 and the fire cover 50 of the present embodiment can realize a five-ring fire shape of a three-ring fire cover through the double gas inlets.

The distance between the first air distribution passage 1021 and the second air distribution passage 1022 in the radial direction of the lower air distribution plate 101 may be determined according to the distance between the fire covers 50 corresponding to the first air distribution passage 1021 and the second air distribution passage 1022. Therefore, the length of the air inlet passage 104 in the radial direction of the lower air distribution plate 101 is also determined by the distance between the fire covers 50 corresponding to the first air distribution passage 1021 and the second air distribution passage 1022.

Optionally, the bottom wall 1023 of the second distribution channel 1022 is at least partially inclined upward in the flow direction of the air flow in the second distribution channel.

In this embodiment, the bottom wall 1023 of the second gas distribution channel is at least partially inclined upward, which can reduce the resistance of the gas flowing in the second gas distribution channel 1022, so as to facilitate the gas flowing along the circumferential direction of the second gas distribution channel 1022.

Optionally, a bottom wall of a junction of the second gas distribution channel 1022 and the intake channel 104 is inclined upward along the flow direction of the gas flow, so as to reduce resistance of the gas flow in the intake channel 104 to the second gas distribution channel 1022 and improve smoothness of the gas flow.

Likewise, the bottom wall 1025 of the third air distribution channel is at least partially sloped upward in the direction of the flow of air within the third air distribution channel 1024.

In this embodiment, the bottom wall 1025 of the third air distribution channel is at least partially inclined upward, so as to reduce the resistance of the gas flowing in the third air distribution channel 1024, and facilitate the gas flowing along the circumferential direction of the third air distribution channel 1024.

Optionally, the bottom wall of the junction of the third air dividing channel 1024 and the air inlet channel 104 is inclined upward along the flowing direction of the air flow, so as to reduce the resistance of the air flow in the air inlet channel 104 to the third air dividing channel 1024 and improve the smoothness of the gas flow.

In some alternative embodiments, the lower gas distribution plate 101 is configured as a disc-shaped semi-enclosed housing that fits both the annular gas mixing chamber and the fire lid 50, and the gas distribution channel 102, the gas inlet channel 104 and the gas inlet 103 are formed in the housing.

Alternatively, the number of the intake passages 104 is plural, and the plural intake passages 104 are sequentially provided at intervals in the circumferential direction of the lower air distribution plate 101. The first air inlet 1031 includes a plurality of sub air inlets 103, the sub air inlets 103 are sequentially arranged along the circumferential direction of the lower air distribution plate 101 at intervals, and the number of the sub air inlets 103 is the same as that of the air inlet passages 104 and corresponds to one another.

In this embodiment, the plurality of air inlet channels 104 are sequentially arranged at intervals along the circumferential direction of the lower air distribution plate 101, that is, each air distribution channel 102 corresponds to a plurality of air inlet channels 104. The plurality of intake passages 104 increase the amount of air supplied to the circumferential direction of the gas distribution passage 102, so that the flow of the gas in each gas distribution passage 102 is more uniform in the circumferential direction.

The air inlet passage 104 is provided with a plurality of corresponding air inlet ports 1031, which are also divided into a plurality of sub air inlet ports 103, and the plurality of sub air inlet ports 103 are arranged on the same circumference to ensure that the gas can flow into each air inlet passage through the sub air inlet ports 103.

As shown in fig. 4, the plurality of air distribution channels 102 further include a first air distribution channel 1021, and the second air distribution channel 1022 is sleeved outside the first air distribution channel 1021, wherein the first air distribution channel 1021 is located at the center of the lower air distribution plate 101 and penetrates through the lower air distribution plate 101 along the thickness direction of the lower air distribution plate 101. The air inlet 103 further includes a second air inlet 1032, and the second air inlet 1032 is communicated with the first air dividing passage 1021.

In this embodiment, the first air distribution channel 1021 is located at the center of the lower air distribution plate 101, and the first air distribution channel 1021 is used for communicating with the inner fire cover 40 in the fire cover 50 to realize the ignition of the inner fire cover 40. The first air distribution channel 1021 can directly communicate with the inner annular air mixing chamber 805 of the burner 80 to realize the combustion of the inner burner cap 40.

Optionally, the inner fire cover 40 corresponds to the first air distribution channel 1021, the middle fire cover 30 corresponds to the second air distribution channel 1022, and the outer fire cover 20 corresponds to the third air distribution channel 1024, wherein the gas flowing in from the first gas inlet 1031 flows to the second air distribution channel 1022 and the third air distribution channel 1024 respectively to supply gas to the outer fire cover 20 and the middle fire cover 30 respectively. The gas of the second gas inlet 1032 flows to the inner fire cover 40 through the first gas distribution channel 1021 to supply gas to the inner fire cover 40.

Optionally, the air distributor 10 and the fire cover 50 together define a secondary air flow passage 70, and the secondary air flow passage 70 communicates with the fire holes of the fire cover 50 to supply secondary air to the fire holes. The lower air distribution plate 101 defines a secondary air passage 105, and the secondary air flow passage 70 includes the secondary air passage 105, and the secondary air passage 105 is located between two adjacent air distribution passages 102. The secondary air channels 105 and the air inlet channels 104 are sequentially arranged in a staggered manner along the circumferential direction of the lower air distribution plate 101.

In this embodiment, the secondary air channel 105 is used to provide secondary air to the fire cover 50 for supplying the flame burning at the fire cover 50 to ensure the stability and sufficiency of the flame burning at the fire cover 50. The secondary air passage 105 is located between two adjacent air distribution passages 102, so that the secondary air can flow between two fire covers 50 corresponding to the two air distribution passages 102, and the two fire covers 50 can be simultaneously supplemented with air. Secondary air channel 105 and inlet channel 104 set up along the circumference of lower air distributor 101 interval in proper order, and like this setting, secondary air channel 105 and inlet channel 104 mutual noninterference guarantee the flow of secondary air and gas, can guarantee the supply volume in fire lid 50 circumference of secondary air and gas moreover.

Optionally, the secondary air channel 105 includes a first secondary air channel 1051 and a second secondary air channel 1052, and the first secondary air channel 1051 is located between the second sub-air channel 1022 and the third sub-air channel 1024 for providing secondary air to the two fire caps 50 corresponding to the second sub-air channel 1022 and the third sub-air channel 1024. The second secondary air channel 1052 is located between the second air dividing channel 1022 and the first air dividing channel 1021, and the second secondary air channel 1052 is used for providing secondary air for the two fire covers 50 corresponding to the first air dividing channel 1021 and the second air dividing channel 1022.

For example, the inner fire cover 40 corresponds to the first air distribution passage 1021, the middle fire cover 30 corresponds to the second air distribution passage 1022, and the outer fire cover 20 corresponds to the third air distribution passage 1024, the inner fire cover 40, the middle fire cover 30, and the outer fire cover 20 cover the air distribution plate 10, and the middle fire cover 30, the outer fire cover 20, and the air distribution plate 10 together define a first secondary air flow passage 701, the first secondary air flow passage 701 includes a first secondary air passage 1051, and the first secondary air passage 1051 can provide secondary air for the middle fire cover 30 and the outer fire cover 20. The inner fire lid 40, the middle fire lid 30 and the air distributor 10 together enclose a second secondary air flow passage 702, the second secondary air flow passage 702 comprises a second secondary air passage 1052, and the second secondary air passage 1052 can provide secondary air for the middle fire lid 30 and the inner fire lid 40.

Optionally, the lower gas distribution plate 101 includes a plate body and a plurality of members, the plurality of members includes a plurality of annular members, and the plurality of annular members are concentrically disposed at the center of the plate body to form a plurality of gas inlets 103 sequentially sleeved on the plate body.

In one embodiment, as shown in fig. 4, the first air inlet 1031 is sleeved outside the second air inlet 1032. The second air inlet 1032 communicates with the inner annular air mixing chamber 805 of the burner 80, and the second air inlet 1032 communicates with the outer annular air mixing chamber 804 of the burner 80.

Optionally, the secondary air channel 105 is formed extending from the bottom of the lower air distribution plate 101 to the top, that is, the secondary air channel 105 protrudes from the plate body. This enables the air distribution passage 102 to be formed separately while the secondary air passage 105 is formed.

Optionally, the secondary air passage 105 is in a structure that gradually converges from the outside to the inside. Illustratively, the secondary air passage 105 is a flared or tapered concave configuration. This can maximize the amount of air flow in the secondary air passage 105. Meanwhile, the length of the gas distribution passage 102 in the circumferential direction is ensured, so that mutual interference of the gases in different gas distribution passages 102 is avoided.

Alternatively, the width of the intake passage 104 is smaller than the width of the secondary air passage 105 in the circumferential direction of the lower air-distributing disk 101, which can ensure the length of the air-distributing passage 102 in the circumferential direction of the lower air-distributing disk 101.

In some optional embodiments, the gas distribution plate 10 further includes an upper gas distribution plate, and the upper gas distribution plate is covered on the lower gas distribution plate 101 to define the gas flow channel 703 together with the lower gas distribution plate 101. The upper gas distribution plate is provided with an air outlet channel 1061 and an air outlet 1062, the fire cover 50 is covered on the upper gas distribution plate and communicated with the air outlet channel 1061, and the fuel gas flows into the fire cover 50 through the air outlet channel 1061, so that the combustion of the fire cover 50 is realized. The fuel gas flow passage 703 includes the gas distribution passage 102 and the gas outlet passage 1061, and the secondary air flow passage 70 includes the secondary air passage 105 and the air outlet 1062.

Optionally, as shown in fig. 2 and fig. 3, the upper gas distribution plate includes an upper gas distribution sheet 106, the upper gas distribution sheet 106 is sheet-shaped, the upper gas distribution sheet 106 covers the lower gas distribution plate 101, the upper gas distribution sheet 106 is provided with gas outlet channels 1061 communicated with the gas distribution channels 102, and the gas outlet channels 1061 are the same in number as the gas distribution channels 102 and are in one-to-one correspondence with the gas distribution channels 102.

In this embodiment, the upper air distribution plate is in the form of an air distribution sheet, which can reduce the height of the whole air distribution plate 10, and meanwhile, the air distribution plate 10 has a simple structure and reduces the cost.

Optionally, the upper air-distributing plate 106 further includes a grid 1063, and the grid 1063 is disposed at the at least one air outlet channel 1061 to guide the air flow in the air-distributing channel 102 to flow out.

In this embodiment, the grid 1063 is used to divide the airflow flowing to the fire cover 50 through the air outlet channel 1061, so as to improve the uniformity of the combustion gas flowing to the fire cover 50.

Optionally, grid 1063 is matched to outlet channel 1061, that is, grid 1063 and outlet channel 1061 have the same or similar shape, size, etc. to improve the flow splitting effect of grid 1063.

Optionally, the grid 1063 is provided with grid holes, and the grid holes are uniformly arranged along the circumferential direction of the upper gas distributing plate 106, so as to further improve the uniformity of the gas flow.

Optionally, the upper air-distributing piece 106 is further provided with air outlets 1062, the air outlets 1062 are communicated with the secondary air channel 105, and the number of the air outlets 1062 is the same as that of the secondary air channel 105, and the air outlets 1062 correspond to the secondary air channel 105 one by one. The air outlets 1062 of the upper air-distributing plate 106 discharge the secondary air in the secondary air passage 105, and the secondary air can flow from the secondary air passage 105 to the air outlets 1062 and then from the air outlets 1062 to the space between the corresponding fire covers 50. Optionally, the air outlets 1062 are matched with their corresponding secondary air channels 105, e.g., are identical or similar in shape, size, etc., to ensure the flow of secondary air.

Optionally, the upper air distribution piece 106 is hermetically connected to the lower air distribution plate 101 to avoid gas leakage in the gas flow passage 703. The upper air distribution plate 106 is detachably connected with the lower air distribution plate 101. So as to facilitate the cleaning, maintenance, replacement and the like of the upper air distribution plate 106 and the lower air distribution plate 101.

Specifically, the upper air distribution plate 106 is connected with the lower air distribution plate 101 by screws. Optionally, the lower gas distribution plate 101 is provided with a first screw hole 1071, the upper gas distribution piece 106 is provided with a second screw hole 1072, and screws penetrate through the first screw hole 1071 and the second screw hole 1072 to realize connection of the upper gas distribution piece 106 and the lower gas distribution plate 101.

Optionally, the first screw holes 1071 are located in the gas distribution passage 102, specifically, the number of the first screw holes 1071 is plural, and the plural first screw holes 1071 are sequentially arranged at intervals along the circumferential direction of the lower gas distribution plate 101. Optionally, the first screw hole 1071 may be provided in the second and/or third gas distribution passages 1022, 1024. As shown, the first screw holes 1071 in the second air distribution passage 1022 and the first screw holes 1071 in the third air distribution passage 1024 are staggered to increase the connection stability of the lower air distribution plate 101 and the upper air distribution piece 106.

Optionally, the air inlet passage 104 divides the second air distribution passage 1022 into a plurality of sub-second air distribution passages arranged along the circumferential direction of the lower air distribution plate 101 at intervals, a first screw hole 1071 is arranged in each sub-second air distribution passage, the bottom walls of the air distribution passages 102 on both sides of the first screw hole 1071 are both inclined upwards along the air flow direction, that is, the screw holes are located at the highest positions of the bottom walls of the sub-second air distribution passages, so that the flowing resistance of the gas can be reduced, the distance between the first screw hole 1071 and the second screw hole 1072 can be reduced, and the connection between the first screw hole 1071 and the second screw hole 1072 is facilitated.

Optionally, first screw hole 1071 in third minute gas passageway 1024 is located intake passage 104 and third minute gas passageway 1024's intercommunication department, and first screw hole 1071 can force the reposition of redundant personnel to the gas that intake passage 104 flows like this to make in the gas can flow to the third minute gas passageway 1024 of intake passage 104 both sides respectively, and then realize the circumference of gas and flow. Alternatively, the intake passage 104 also divides the third air distribution passage 1024 into a plurality of sub-third air distribution passages provided at intervals in the circumferential direction of the lower air distribution plate 101.

Optionally, the thickness of upper gas distribution sheet 106 ranges from 1mm to 3 mm. For example, the thickness of the upper gas distribution sheet 106 may be 1mm, 1.5mm, 2mm, 3mm, etc. The thickness of the upper gas distribution sheet 106 is less than 1mm, and the upper gas distribution sheet 106 has low strength and is easy to damage. When the thickness of the upper air distribution sheet 106 is larger than 3mm, the upper air distribution sheet 106 is too thick, which is easy to cause waste, and the effect of reducing the overall height of the air distribution plate 10 is not obvious.

Alternatively, the upper gas-distributing plate 106 is made of metal such as stainless steel.

Alternatively, the upper air distribution piece 106 and the lower air distribution plate 101 may be connected by welding or integrally molding.

Optionally, the connection surface between the upper air distribution sheet 106 and the lower air distribution plate 101 is a plane, so as to improve the sealing performance of the connection.

In one embodiment, the fire cover 50 is placed over the upper distributor plate. Taking the fire cover 50 comprising the inner fire cover 40, the middle fire cover 30 and the outer fire cover 20 as an example, the fuel gas flow channel 703 comprises a first fuel gas flow channel, a second fuel gas flow channel and a third fuel gas flow channel, the first fuel gas flow channel comprises a first air distribution channel 1021 and an air outlet channel 1061 corresponding to the first air distribution channel 1021, the second fuel gas flow channel comprises a second air distribution channel 1022 and an air outlet channel 1061 corresponding to the second air distribution channel 1022, and the third fuel gas flow channel comprises a third air distribution channel 1024 and an air outlet channel 1061 corresponding to the third air distribution channel 1024. Wherein, the inner fire cover 40 is communicated with the first gas flow passage, the middle fire cover 30 is communicated with the second gas flow passage, and the outer fire cover 20 is communicated with the third gas flow passage.

In another embodiment, the fire cover 50 is covered on the lower air distribution plate 101, and the fire cover 50 can be directly covered on the air distribution channel 102, that is, the fire cover 50 and the air distribution channel 102 together define the fuel gas flow channel 703. Wherein, the gas distribution channel 102 of the lower gas distribution plate 101 between the adjacent fire covers 50 is provided with an upper side wall to avoid gas leakage. Thus, the number of the upper air distribution plate can be reduced to further reduce the height of the air distribution plate 10, and the cost of the air distribution plate 10 can be reduced.

Optionally, the burner 100 further includes an injection pipe 90, the injection pipe 90 is communicated with the air inlet 103, and the injection pipes 90 and the air inlet 103 are the same in number and are in one-to-one correspondence.

In this embodiment, the ejector tube 90 is used to provide fuel gas to the air inlet passage 104, and compared with the burner 100 with the same ring fire in the related art, the number of the air inlets 103 in the embodiment of the present disclosure is reduced, and the number of the ejector tubes 90 can also be reduced. This can reduce the quantity of drawing the pipe 90, and then reduce the size of combustor 100, be convenient for the installation of combustor 100.

In some embodiments, the ejector tube 90 may be directly connected to the air inlet 103, for example, when the first air inlet 1031 is located at the outer end of the air inlet passage 104, if the first air inlet 1031 and the second air inlet 1032 are still sleeved, the air inlet 103 may not correspond to the annular air mixing chamber of the burner 80. At this time, the injection pipe 90 is directly communicated with the first gas inlet 1031, so that the gas can flow into the injection pipe conveniently.

Optionally, the gas inlet 103 is configured to match the diameter of the gas outlet of the ejector tube 90.

In other embodiments, the ejector tube 90 may be communicated with the air inlet 103 through the annular air mixing cavity of the burner 80, that is, the air inlet 103 is communicated with the outlet of the annular air mixing cavity, and the air inlet 103 is matched with the outlet of the annular air mixing cavity. For example, when the first air inlet 1031 is sleeved outside the second air inlet 1032, the first air inlet 1031 is communicated with the outer air mixing chamber 804 of the burner 80, and the second air inlet 1032 is communicated with the inner air mixing chamber 805 of the burner 80. Through the furnace end 80 of two rings and the gas distribution plate 10 of this application, realize that two rings of gas circuits become three rings of gas circuits.

As shown in fig. 12, the burner 100 further includes a thermocouple 405, the thermocouple 405 being used for flameout protection of the burner 100. The burner 80 includes a first sidewall 801 and a second sidewall 802, the second sidewall 802 being located inside the first sidewall 801, the first sidewall 801 and the second sidewall 802 together defining an outer annular air mixing chamber 804. The outer wall surface of the first sidewall 801 is recessed to form an avoiding groove (hereinafter, referred to as a first avoiding groove 803 for convenience of distinction), and the first avoiding groove 803 is used for placing the thermocouple 405.

The outer wall surface of the first side wall 801 is recessed, so that the position of the thermocouple 405 is arranged inwards compared with the position of the thermocouple 405 in the prior art, and thus, the diameter of the inner fire cover 40 can be reduced, the minimum load of the inner ring fire (ring flame at the inner fire cover 40) can be reduced, and the minimum fire of the inner ring fire can be further reduced, for example, the minimum fire can be 200W. Thereby make the flame control range of gas-cooker increase, make the minimum fire of interior ring fire can further reduce like this, the user is when adopting minimum fire heat preservation or a kind of deep pot hot water, and the soup in the pot can not be burnt dry fast, improves the user to the control range of the flame of interior ring fire, improves user's use and experiences.

Optionally, a portion of the first sidewall 801 protrudes towards the second sidewall 802 as a whole to form a first avoidance groove 803.

The whole part of the first side wall 801 protrudes towards the second side wall 802 to form a first avoiding groove 803 for placing the thermocouple 405, and the other part of the first side wall 801 is kept in an original shape, so that on one hand, the strength of the first side wall 801 is ensured, and on the other hand, the first avoiding groove 803 cannot occupy the outer ring gas path too much, so that the smoothness of the gas flowing in the outer ring gas path is ensured, and the gas or the gas and air mixture can smoothly reach the outer ring fire (the ring flame of the outer fire cover 20) and/or the middle ring fire (the ring flame of the middle fire cover 30).

Optionally, the furnace end 80 is connected with the lower gas distribution plate 101 in a sealing manner, and the side wall corresponding to the outer ring gas mixing cavity 804 is sealed with the lower gas distribution plate 101 in the form of end face sealing and radial sealing. And the inner ring air mixing cavity 805 and the corresponding side wall are sealed with the lower air distribution plate 101 by end faces.

Optionally, the connection surface of the fire cover 50 and the upper wall surface of the gas distribution plate 10 is a plane, and the fire cover 50 is hermetically connected with the gas distribution plate 10 to avoid gas leakage.

As shown in fig. 5, the embodiment of the present disclosure further provides a fire cover 50, where the fire cover 50 includes a fire cover body 502 and a connecting rib 503, the fire cover body 502 defines a gas mixing chamber 501, and the gas mixing chamber 501 is communicated with the gas outlet channel 1061 of the gas distribution plate 10. The connecting rib 503 is disposed on at least one side wall of the fire cover 50 and extends in a direction away from the gas mixing chamber 501, and when the fire cover 50 is disposed above the gas distribution plate 10, the connecting rib 503 can abut against the upper wall surface of the gas distribution plate 10.

In this embodiment, the gas flowing out of the gas outlet channel 1061 of the gas distributor 10 flows into the gas mixing chamber 501 of the fire cover 50, and then flows out of the fire holes of the fire cover 50, so as to realize the flame combustion of the fire cover 50. The fire cover 50 is hermetically connected with the gas distribution plate 10 to prevent leakage of gas. The arrangement of the connecting rib 503 can increase the contact area between the fire cover 50 and the upper wall surface of the gas distribution plate 10. On the other hand, the connecting ribs 503 can also increase the gravity of the fire cover 50, so that the fire cover 50 can be pressed on the gas distribution plate 10, and finally the sealing effect of the fire cover 50 and the gas distribution plate 10 can be increased.

The air distribution plate 10 comprises an upper air distribution plate and a lower air distribution plate 101, and the connecting rib 503 is abutted against the upper wall surface of the air distribution plate 10, that is, the connecting rib 503 is abutted against the upper wall surface of the upper air distribution plate. For example, when the upper air distribution plate includes the upper air distribution piece 106, the connecting rib 503 can abut against the upper air distribution piece 106.

Optionally, when the fire cover 50 is covered on the air distribution plate 10, the connecting rib 503 is abutted against the upper wall surface of the air distribution plate 10 corresponding to the air inlet passage 104.

In this embodiment, the air distributor 10 defines the secondary air flow passage 70 and the fuel gas flow passage 703, and the secondary air flow passages 70 are sequentially arranged in a staggered manner along the circumferential direction of the air distributor 10. The connecting rib 503 is abutted against the upper wall surface of the gas distribution plate 10 corresponding to the gas flow passage 703, so that the contact area between the fire cover 50 and the gas distribution plate 10 can be increased. On the other hand, the connecting rib 503 can be prevented from blocking the flow of the air flow in the secondary air flow passage 70, so as to ensure that the secondary air can smoothly flow to the fire hole of the fire cover 50.

Alternatively, the connecting rib 503 is fitted to the upper wall surface of the air distribution plate 10 corresponding to the air inlet passage 104, so that the connecting rib 503 abuts against the upper wall surface of the air distribution plate 10.

In this embodiment, the fitting of the connecting rib 503 and the upper wall surface of the air distribution plate 10 corresponding to the air inlet passage 104 means: the size, shape, etc. of the connecting rib 503 are the same as or similar to the upper wall surface of the air distribution plate 10 corresponding to the air inlet passage 104. This can further increase the contact area between the connection rib 503 and the gas distribution plate 10, and increase the sealing effect of the fire cover 50. For example, the upper wall surface of the gas distribution plate 10 corresponding to the air inlet passage 104 includes an arc segment and a straight segment which are connected, and correspondingly, the connecting rib 503 also includes an arc segment and a straight segment, so as to realize the sealing connection between the connecting rib 503 and the gas distribution plate 10.

Optionally, the length of the connecting rib 503 along the circumferential direction of the fire cover 50 is the same as or similar to the length of the air inlet passage 104 along the circumferential direction of the fire cover 50, so as to increase the contact area between the connecting rib 503 and the air distribution plate 10 and improve the sealing effect between the connecting rib 503 and the air distribution plate 10.

Optionally, the number of the connecting ribs 503 is plural, and the plurality of connecting ribs 503 are sequentially arranged at intervals along the circumferential direction of the fire cover 50.

In this embodiment, the arrangement of the plurality of connecting ribs 503 can further increase the connecting area between the fire cover 50 and the gas distribution plate 10, and increase the sealing effect. Alternatively, the number of the connecting ribs 503 is the same as the number of the air inlet passages 104, and the connecting ribs 503 correspond to one another, so that the contact area between the fire cover 50 and the air distribution plate 10 can be increased, and the interference of the connecting ribs 503 on the flow of the secondary air can be avoided.

Optionally, the width of the connecting rib 503 is less than half of the width of the fire lid body 502 along the radial direction of the fire lid 50.

In this embodiment, the radial width of the connecting rib 503 along the fire cover 50 is too small, so that the effect of increasing the sealing of the connecting rib 503 is not obvious, and the radial width of the connecting rib 503 along the fire cover 50 is too large, so that the weight of the fire cover 50 is increased, and further the manufacturing cost of the fire cover 50 is increased.

Optionally, in a case that the upper air distribution plate includes the upper air distribution piece 106, the lower end surface of the connecting rib 503 and the lower end surface of the fire cover body 502 are on the same plane, so that both the fire cover body 502 and the connecting rib 503 can abut against the upper wall surface of the upper air distribution piece 106.

In this embodiment, the lower end face of the connecting rib 503 and the lower end face of the fire cover body 502 are located on the same plane, and when the upper air distribution piece 106 is abutted against the fire cover body 502 and the connecting rib 503, the connecting face of the connecting rib 503 and the upper air distribution piece 106 and the connecting face of the fire cover body 502 and the upper air distribution piece 106 are all located on the same plane. Therefore, the tightness between the fire cover 50 and the gas distribution plate 10 can be improved, and the gas is prevented from leaking between the fire cover 50 and the connecting rib 503.

Alternatively, the connection rib 503 may be disposed on the inner sidewall 5021 of the fire cover 50, or may be disposed on the outer sidewall 5022 of the fire cover 50. When the fire lid 50 includes three fire lids 50, as shown in fig. 1, the connecting rib 503 is provided on the middle fire lid 30 and on the side wall of the middle fire lid 30 facing the inner fire lid 40. The distance between the middle fire cover 30 and the inner fire cover 40 is large, and the connecting ribs 503 are arranged, so that the connecting ribs 503 have sufficient arrangement space, and the middle fire cover 30 is convenient to mount, dismount and take. It can be understood that: the connection rib 503 may also be provided on the side wall of the middle fire cover 30 facing the outer fire cover 20.

In some alternative embodiments, as shown in fig. 5, the plurality of flame holes include a main flame hole 5014 and a flame stabilizing hole 5015, and the plurality of flame holes include a flame hole set 5013, the flame cover 50 defines a flame hole set 5013 communicated with the gas mixing chamber 501, the flame hole set 5013 includes a main flame hole 5014 and a plurality of flame stabilizing holes 5015, and the plurality of flame stabilizing holes 5015 are wrapped outside the main flame hole 5014.

In this embodiment, the plurality of flame stabilizing holes 5015 are wrapped on the outer side of one main flame hole 5014, so that the flame stabilizing holes 5015 can stabilize the flame at the main flame hole 5014 from a plurality of directions. Thereby preventing the flame at the main flame holes 5014 from leaving the flame and also preventing the flame at the main flame holes 5014 from drifting away from the flame cover 50. The provision of the fire hole group 5013 can increase the flame stabilizing effect at the main fire holes 5014 of the fire cover 50. And because the flame stabilizing holes 5015 are wrapped outside the main flame holes 5014, the distance between the adjacent main flame holes 5014 is increased, the adjacent main flame holes 5014 can be prevented from competing for air, and the smoke value of the main flame holes 5014 during combustion is reduced.

Optionally, at least two flame stabilizing holes 5015 of the plurality of flame stabilizing holes 5015 are located on both sides of the main flame hole 5014, respectively.

In this embodiment, since the main flame holes 5014 are generally disposed near the top of the fire cover 50, at least two flame stabilizing holes 5015 are respectively disposed at two sides of the main flame holes 5014, so as to facilitate the disposition of the flame stabilizing holes 5015. And the at least two flame stabilizing holes 5015 can stabilize the flame of the main flame holes 5014 from two sides, thereby ensuring the flame stabilizing effect of the main flame holes 5014. And the non-uniformity of the flame is avoided.

Optionally, the height of the center of the flame stabilizing holes 5015 is less than the height of the center of the main flame holes 5014.

In this embodiment, the flame stabilizing holes 5015 can mainly stabilize the flame at the root of the lower edge of the main flame holes 5014, so as to prevent the flame at the middle lower part of the main flame holes 5014 from leaving the flame.

Alternatively, the height of the topmost end of the flame stabilizing hole 5015 is lower than the height of the center of the main flame hole 5014, so that the flame stabilizing hole 5015 is partially positioned below the main flame hole 5014, the flame stabilizing effect on the root of the lower edge of the main flame hole 5014 can be further increased, and the main flame hole 5014 is prevented from getting out of flame.

Optionally, the height of the lowermost end of the flame stabilizing holes 5015 is lower than the height of the lowermost end of the main flame holes 5014. To increase the flame holding effect on the lower edge root of the main fire hole 5014.

It should be noted that: the flame stabilizing holes 5015 may also be located in the middle or upper portion of the main flame holes 5014 to stabilize the flame in the middle or upper portion of the main flame holes 5014.

Optionally, the flow area of the primary flame holes 5014 is larger than the flow area of the flame stabilizing holes 5015.

In this embodiment, the flame stabilizing holes 5015 are wrapped on two sides of the main flame hole 5014, the flow area of the flame stabilizing holes 5015 is small, and the flame of the flame stabilizing holes 5015 is small, so that the condition that the flame of the flame stabilizing holes 5015 and the flame of the main flame hole 5014 robs air can be avoided, and the smoke of the flame can be further reduced.

Alternatively, the number of the fire hole groups 5013 is plural, and the plural fire hole groups 5013 are sequentially provided at intervals in the circumferential direction of the fire cover 50.

In this embodiment, the plurality of fire hole sets 5013 are arranged at intervals, so that air contention among the plurality of fire hole sets 5013 can be avoided, and smoke generated during combustion of the fire hole sets 5013 can be further reduced.

Optionally, the distance between two adjacent fire hole sets 5013 is greater than the length of any one of the fire hole sets 5013 in the circumferential direction of the fire cover 50. The distance between the adjacent fire hole groups 5013 is large, air contention between the adjacent fire hole groups 5013 can be avoided, and smoke is further reduced.

Specifically, the number of fire hole groups 5013 can be 6-12, such as 6, 8, 10, or 12. When the number of the fire hole groups 5013 is less than 6, the fire cover 50 is not easy to form annular flame, which causes uneven flame of the fire cover 50 and affects the heating effect of the cookware and other appliances. When the number of the fire hole groups 5013 is more than 12, the adjacent fire hole groups 5013 are too close to each other, and thus the fire hole groups are likely to interfere with each other to compete for air, and the amount of smoke is large. It should be noted that: the number of sets of the fire hole sets 5013 may be set according to the circumference of the fire cover 50, and any arrangement that can realize the ring flame of the fire cover 50 and has the effects of the fire hole sets 5013 of the present application is included in the alternative embodiments of the present application.

Optionally, the direction of flow of the airflow within the primary fire apertures 5014, the primary fire apertures 5014 are angled upwardly; and/or, the flame stabilizing holes 5015 are angled upward in the direction of the flow of the gas stream within the flame stabilizing holes 5015.

In this embodiment, the main flame holes 5014 and the flame stabilizing holes 5015 are both inclined upward along the flowing direction of the airflow, so that the heating effect on the cookware can be improved, the injection effect of the main flame holes 5014 and/or the flame stabilizing holes 5015 on the secondary air can be increased, and the supply amount of the secondary air can be further increased, so as to ensure the sufficient combustion of the flame at the main flame holes 5014 and/or the flame stabilizing holes 5015.

Optionally, as shown in FIG. 1, the fire hole set 5013 is located at least partially within the secondary air flow path 70.

In this embodiment, the fire hole set 5013 is at least partially located in the secondary air runner 70 and is communicated with the secondary air runner 70, which can improve the smoothness of the secondary air reaching the fire hole set 5013, so as to ensure that the flame can be fully combusted and the smoke is reduced. As shown in fig. 1, one or both of the fire holes of the set of fire holes 5013 are located in the second secondary air flow passage 702.

Alternatively, as shown in fig. 5 and 6, the fire cover 50 includes an inner sidewall 5021, an outer sidewall 5022 and a top wall 5023, the inner sidewall 5021 being annular; the outer sidewall 5022 is annular, and the outer sidewall 5022 is located outside the inner sidewall 5021; the top wall 5023 is annular, the top wall 5023 is connected between the upper end of the inner side wall 5021 and the upper end of the outer side wall 5022, and the top wall 5023, the inner side wall 5021 and the outer side wall 5022 jointly enclose the gas mixing chamber 501; wherein, lateral wall 5022 is equipped with the outside fire hole 5011 that is linked together with gas mixing chamber 501, and fire hole group 5013 locates the inside wall 5021.

In this embodiment, the fire hole set 5013 is disposed on the inner sidewall 5021 of the fire cover 50, that is, the inner sidewall 5021 of the fire cover 50 can form a ring-shaped flame. An annular flame is also formed at the outer sidewall 5022. Thus, the flame range of the fire cover 50 is increased, no firepower dead angle of the fire cover 50 is realized, the flame of the fire cover 50 is more uniform, and the fire cover is suitable for pancake, fried steak and the like. It should be noted that: the outer side wall 5022 may not be provided with the outer fire holes, and the fire cover 50 is provided with the fire hole group 5013 on the inner side wall 5021, so that combustion of the fire cover 50 can be realized, and smoke of flame can be reduced.

When the number of the fire covers 50 is three, the middle fire cover 30 is provided with the fire hole groups 5013, and illustratively, the inner side wall 5021 of the middle fire cover 30 is provided with the fire hole groups 5013, so that the flame areas of the three fire covers 50 are increased, and the heating effect and the heating uniformity of the fire covers 50 are improved. It can be understood that: the outer fire cover 20 may also be provided with a fire hole set 5013, and the fire hole set 5013 may be provided on the inner sidewall 5021 and the outer sidewall 5022 of the outer fire cover 20.

Alternatively, as shown in fig. 1, when the number of the fire covers 50 is three, the three fire covers 50 include an inner fire cover 40, a middle fire cover 30 and an outer fire cover 20 which are sequentially sleeved from inside to outside. Interior fire lid 40 is injectd interior gas mixing chamber 401, and the lateral wall of interior fire lid 40 sets up the interior fire hole 402 that is linked together with interior gas mixing chamber 401 gas mixing chamber 501, and interior fire hole 402 sets up along the circumference interval of interior fire lid 40 in proper order to be the annular setting, in order to form annular flame. The middle fire cover 30 defines a middle ring air mixing chamber 301, the middle ring cover 30 is provided with middle ring inner fire holes 3011 and middle ring outer fire holes 3012 communicated with the middle ring air mixing chamber 301, the middle ring outer fire holes 3012 are located on the outer side of the middle ring inner fire holes 3011, the middle ring inner fire holes 3011 and the middle ring outer fire holes 3012 are all sequentially arranged at intervals along the circumferential direction of the middle fire cover 30 and are all arranged in a ring shape to form a ring-shaped flame. Outer fire lid 20 inject outer loop gas mixing chamber 201, and outer fire lid 20 sets up the outer ring hole 2011 of firing in 2012 and the outer ring that is linked together with outer loop gas mixing chamber 201, and outer fire hole 2011 of outer loop is located the outside of outer loop hole 2012 of firing, and outer fire hole 2012 of firing and outer loop hole 2011 of firing all set up along the circumference of outer fire lid 20 interval in proper order in the outer loop to all be the annular setting, in order to form annular flame.

The outer ring gas mixing chamber 201 is communicated with the third gas distribution channel 1024, and gas in the third gas distribution channel 1024 flows into the outer ring gas mixing chamber 201, can respectively flow out of the outer ring outer fire hole 2011 and the outer ring inner fire hole 2012, and respectively forms five-ring fire and four-ring fire at the outer ring outer fire hole 2011 and the outer ring inner fire hole 2012. After the gas in the second gas distribution channel 1022 flows into the middle ring gas mixing chamber 301, the gas can respectively flow out of the middle ring outer fire hole 3012 and the middle ring inner fire hole 3011, and then a three-ring fire and a two-ring fire are respectively formed at the middle ring outer fire hole 3012 and the middle ring inner fire hole 3011. After the gas in the first gas distribution channel 1021 flows to the inner ring gas mixing cavity 805, the gas flows out from the inner fire hole 402 to form a ring fire. Therefore, the three fire covers 50 can form a one-ring fire, a two-ring fire, a three-ring fire, a four-ring fire and a five-ring fire which are sequentially sleeved from the inside to the outside.

In the present embodiment, the inner fire cover 40, the middle fire cover 30 and the outer fire cover 20 can form a five-ring fire form to increase the flame area and the flame uniformity of the fire cover 50. Set up like this and increased the variety of the mode of putting out a fire, increased heating area's flexibility, can satisfy multiple culinary art demand, for example, fry in shallow oil, cook the heating scene such as searing.

Optionally, as shown in fig. 18, the burner 100 further includes an ignition needle 60, the ignition needle 60 is located between the middle fire cover 30 and the outer fire cover 20, the ignition needle 60 is used for igniting the middle ring outer fire hole 3012, after the middle ring outer fire hole 3012 is ignited, the flame at the middle ring outer fire hole 3012 can be sequentially transmitted to the middle ring inner fire hole 3011 and the inner fire hole 402, and the flame at the middle ring outer fire hole 3012 can also be sequentially transmitted to the outer ring inner fire hole 2012 and the outer ring outer fire hole 2011.

In this embodiment, the burner 100 can achieve cross-channel ignition of the fire cover 50 by one ignition needle 60. Eventually causing the fire lid 50 to assume the form of a five-ring fire. The number and the arrangement space of the ignition needles 60 are reduced, the convenience of mounting the burner 100 is improved, the burner 100 is convenient to clean, the assembly difficulty of the burner 100 is reduced, and the manufacturing cost of the burner 100 can be reduced.

Alternatively, as shown in fig. 1 and 5, the burner 100 further includes a ignition cap 601, and the ignition cap 601 is provided at the outer sidewall 5022 of the middle cap 30 and extends in a direction toward the outer cap 20. The ignition cap 601 is arranged corresponding to the ignition needle 60, so that the ignition needle 60 ignites the annular outer fire hole 3012.

In this embodiment, the ignition cap 601 is disposed on the middle fire cover 30 and is externally disposed on the outer side of the middle fire cover 30 so as to discharge in cooperation with the ignition needle 60 located between the middle fire cover 30 and the outer fire cover 20 to ignite the centering ring outer fire hole 3012.

Optionally, the outer sidewall 5022 of the middle fire cover 30 is further provided with a firing hole 602 communicated with the middle ring air mixing chamber 301, the firing hole 602 is located below the firing cap 601, and the firing hole 602 and the firing pin 60 are correspondingly arranged to cooperate with the firing pin 60 and the firing cap 601 for firing. The outer wall surface of the middle fire cover 30 corresponding to the ignition hole 602 is recessed inward to form an avoiding groove (for convenience of distinction, hereinafter referred to as a second avoiding groove 603), and the second avoiding groove 603 is used for avoiding the ignition needle 60.

In this embodiment, the ignition hole 602 is communicated with the middle ring air mixing chamber 301, the gas flows out from the middle ring air mixing chamber 301, the ignition cap 601 is matched with the ignition needle 60 to form a discharge arc, the gas sprayed out from the ignition hole 602 is ignited, and then the flame is transmitted to the whole middle ring outer fire hole 3012, so that the ignition of the middle ring outer fire hole 3012 is realized. The outer wall surface corresponding to the ignition hole 602 is recessed inwards to form a second avoidance groove 603, so that the ignition needle 60 is convenient to mount, the ignition needle 60 is close to the middle fire cover 30 as much as possible, and the ignition success rate is improved. And the second avoiding groove 603 is recessed inwards, so that the soup can be prevented from flowing to the ignition hole 602 to block the ignition hole 602.

Optionally, the middle fire cover 30 is further provided with a middle ring flame stabilizing slot 3013 communicated with the middle ring gas mixing chamber 301, the middle ring flame stabilizing slot 3013 extends along the circumferential direction of the middle fire cover 30, and the middle ring flame stabilizing slot 3013 is located below the middle ring outer fire hole 3012. The ignition hole 602 is located above the middle ring flame stabilizing groove 3013, and after the ignition hole 602 is ignited, the flame at the ignition hole 602 ignites the middle ring outer flame hole 3012 through the middle ring flame stabilizing groove 3013 along the circumferential direction of the middle fire cover 30.

In this embodiment, after the ignition hole 602 is ignited, the flame is transmitted to the middle ring flame stabilizing slot 3013 below, transmitted to the whole circumference of the middle flame cover 30 through the middle ring flame stabilizing slot 3013, and simultaneously ignited at the middle ring outer flame hole 3012, forming a three-ring flame.

Optionally, the middle fire cover 30 is further provided with a first fire transfer groove 302 communicated with the middle ring gas mixing chamber 301, and the first fire transfer groove 302 is used for transferring fire between the middle ring inner fire hole 3011 and the middle ring outer fire hole 3012. Wherein, the quantity of first fire transmission groove 302 is a plurality of, and a plurality of first fire transmission grooves 302 set up along the circumference of well fire lid 30 interval in proper order.

In this embodiment, the middle fire cover 30 is provided with a plurality of first fire transfer grooves 302, so that the fire transfer smoothness between the three-ring fire and the two-ring fire is improved.

Optionally, the outer fire cover 20 is provided with a second fire transfer groove 202, and the second fire transfer groove 202 is communicated with the outer ring gas mixing chamber 201 and is used for transferring fire between the outer ring outer fire hole 2011 and the outer ring inner fire hole 2012.

Optionally, as shown in fig. 5, the middle fire cover 30 includes a first inner sidewall 303, a first outer sidewall 304 and a first top wall 305, the first inner sidewall 303 is annular, and the first inner sidewall 303 defines a middle ring inner fire hole 3011 and a first fire transfer hole 3021 communicated with the middle ring gas mixing chamber 301. The first outer sidewall 304 is annular and located outside the first inner sidewall 303, and the first outer sidewall 304 is provided with a middle ring outer fire hole 3012 and a second fire transfer hole 3022 communicated with the middle ring gas mixing chamber 301. The first top wall 305 is annular and connected between the upper end of the first inner sidewall 303 and the upper end of the first outer sidewall 304, wherein the first inner sidewall 303, the first outer sidewall 304 and the first top wall 305 together enclose the middle ring gas mixing chamber 301.

In this embodiment, the first inner sidewall 303 and the first outer sidewall 304 are disposed in parallel, so that the middle ring inner fire hole 3011 and the middle ring outer fire hole 3012 are disposed in parallel. The two-ring fire and the three-ring fire can thus avoid crossover, reduce smoke, and make the flame of the fire cover 50 more uniform.

As shown in fig. 16, the first fire transfer groove 302 sequentially penetrates the first inner side wall 303, the first top wall 305 and the first outer side wall 304, and the first fire transfer groove 302 is communicated with the first fire transfer hole 3021 and the second fire transfer hole 3022. The upper end of the first fire transfer groove 302 is opened, two opposite side walls of the opening of the first fire transfer groove 302 are provided with first uniform flow holes, the first uniform flow holes extend upwards, the lower end of the first uniform flow holes is communicated with the middle ring gas mixing chamber 301, and the upper ends of the first uniform flow holes are sealed.

In this embodiment, the first fire transfer holes 3021 and the middle ring inner fire holes 3011 are all disposed on the first inner sidewall 303 of the middle fire cover 30, and the first fire transfer holes 3021 and the middle ring inner fire holes 3011 are sequentially disposed at intervals along the circumferential direction of the middle fire cover 30. Thus, when the middle ring inner fire hole 3011 is ignited, the first fire hole 3021 can also be ignited, and then the fire is transmitted to the second fire hole 3022 through the first fire groove 302. Since the second fire transfer holes 3022 are located on the first outer side wall 304 of the middle fire cover 30, and the second fire transfer holes 3022 and the outer ring outer fire holes 2011 are sequentially arranged at intervals in the circumferential direction of the middle fire cover 30. Therefore, after the second fire transfer holes 3022 are ignited, the flame can be transferred to the whole middle ring outer fire holes 3012. Similarly, after the second fire transfer holes 3022 are ignited, the second fire can be transferred to the first fire transfer holes 3021 through the first fire transfer grooves 302, and finally, the second ring fire and the third ring fire can be transferred.

The first uniform flow holes are located in the middle of the first fire transfer groove 302, extend upwards and are arranged on two side walls of the first fire transfer groove 302 opposite to the opening. Set up like this, the gas phase offset of the first even discharge orifice outflow of two lateral walls, thereby the mixing uniformity of gas and air in first fire transfer groove 302 has been improved, the velocity of flow has been reduced simultaneously again, flame stabilization performance has been improved, thereby solved first fire transfer groove 302 and for the open type with external intercommunication and produce easily because of the biography fire blocking phenomenon that the gas speed caused at the excessive speed, play fine flame stabilization effect to the flame of first fire transfer groove 302 department, can guarantee the secondary air supply of inside first fire transfer groove 302, guarantee the flame burning in the first fire transfer groove 302.

Optionally, as shown in fig. 1, the outer fire cover 20 is provided with an outer ring inner flame stabilizing slot 2014 communicated with the outer ring gas mixing chamber 201, and the outer ring inner flame stabilizing slot 2014 is located below the outer ring inner fire hole 2012 and extends along the circumferential direction of the outer fire cover 20.

In this embodiment, flame stabilizing slot 2014 is located the below of outer loop inner fire hole 2012, can carry out the flame for the lower edge root of the flame of outer loop inner fire hole 2012, avoids the flame of outer loop inner fire hole 2012 to leave the flame.

Optionally, the outer fire cover 20 is further provided with an outer ring outer flame stabilizing groove 2013 communicated with the outer ring air mixing chamber 201, and the outer ring outer flame stabilizing groove 2013 is located below the outer ring outer fire hole 2011 and extends along the circumferential direction of the outer fire cover 20.

In this embodiment, the outer flame stabilizing groove 2013 of the outer ring is located below the outer fire hole 2011 of the outer ring, and can stabilize the flame for the root of the lower edge of the flame of the outer fire hole 2011 of the outer ring, so that the flame at the outer fire hole 2011 of the outer ring is prevented from leaving the flame.

Optionally, as shown in fig. 11, the outer fire cover 20 includes a second inner sidewall 203, a second outer sidewall 204 and a second top wall 205, the second inner sidewall 203 is annular, and the second inner sidewall 203 is further provided with an outer ring inner fire hole 2012 and a third fire transfer hole 2021 communicated with the outer ring gas mixing chamber 201; the second outer sidewall 204 is annular and located outside the second inner sidewall 203, and the second outer sidewall 204 further has an outer ring outer fire hole 2011 and a fourth fire transfer hole 2022 communicated with the outer ring air mixing chamber 201. The second top wall 205 is annular and is connected between the upper end of the second inner side wall 203 and the upper end of the second outer side wall 204, wherein the second inner side wall 203, the second outer side wall 204 and the second top wall 205 together enclose the outer annular gas mixing chamber 201.

In this embodiment, the second inner sidewall 203 and the second outer sidewall 204 are disposed in parallel, so that the outer ring inner fire hole 2012 and the outer ring outer fire hole 2011 are disposed in parallel. The four-ring fire and the five-ring fire can avoid the cross, reduce the smoke and make the flame of the fire cover 50 more uniform.

As shown in fig. 15, the outer fire cover 20 is provided with a second fire transfer groove 202, the second fire transfer groove 202 sequentially penetrates through the second inner side wall 203, the second top wall 205 and the second outer side wall 204, and the second fire transfer groove 202 is communicated with the outer ring air mixing chamber 201, the third fire transfer hole 2021 and the fourth fire transfer hole 2022. The upper end of the second fire transfer groove 202 is open, two opposite side walls of the opening of the second fire transfer groove 202 are provided with second flow equalizing holes 2023, the second flow equalizing holes 2023 extend upwards, the lower end of the second flow equalizing holes 2023 is communicated with the outer ring gas mixing chamber 201, and the upper end of the second flow equalizing holes 2023 is closed.

In this embodiment, the third fire transmitting hole 2021 and the outer ring inner fire hole 2012 are both located on the second inner sidewall 203 of the outer fire cover 20, and the third fire transmitting hole 2021 and the outer ring inner fire hole 2012 are both sequentially disposed along the circumference of the outer fire cover 20 at intervals. The fourth fire transfer holes 2022 and the outer ring outer fire holes 2011 are both located on the second outer sidewall 204 of the outer fire cover 20, and the fourth fire transfer holes 2022 and the outer ring outer fire holes 2011 are sequentially arranged at intervals along the circumference of the outer fire cover 20. The operation and effects of the third fire transfer hole 2021, the fourth fire transfer hole 2022 and the second fire transfer groove 202 are the same as those of the first fire transfer hole 3021, the second fire transfer hole 3022 and the first fire transfer groove 302, and thus, the detailed description thereof is omitted. The function of the second uniform flow hole 2023 is also the same as that of the first uniform flow hole, and will not be described again.

Alternatively, as shown in fig. 1, the air distributor 10 defines a first secondary air flow passage 701 together with the middle fire cover 30 and the outer fire cover 20, and the first secondary air flow passage 701 is located between the middle fire cover 30 and the outer fire cover 20. The ignition needle 60 is located in the first secondary air flow passage 701, the middle ring outer fire hole 3012 and/or the outer ring inner fire hole 2012 are located in the first secondary air flow passage 701, and the first secondary air flow passage 701 is communicated with each other.

In this embodiment, the middle ring outer fire hole 3012 and/or the outer ring inner fire hole 2012 are both located in the first secondary air flow channel 701, so that the supply amount of secondary air at the middle ring outer fire hole 3012 and/or the outer ring inner fire hole 2012 can be increased, the combustion sufficiency of the gas at the middle ring outer fire hole 3012 and/or the outer ring inner fire hole 2012 can be improved, and the smoke can be reduced.

Optionally, as shown in fig. 1 and 10, in the case that the fire cover 50 includes at least two fire covers 50, an embodiment of the present disclosure provides a fire cover assembly, where the fire cover assembly includes a first fire cover 507 and a second fire cover 508 sleeved in sequence from outside to inside, the first fire cover 507 defines a first gas mixing chamber, an inner side wall 5021 of the first fire cover 507 is provided with a first fire hole 5071 communicated with the first gas mixing chamber, and the first fire hole 5071 is inclined upwards in the direction from outside to inside; the first fire cover 507 is sleeved on the outer side of the second fire cover 508, the second fire cover 508 defines a second gas mixing chamber, a second fire hole 5081 communicated with the second gas mixing chamber is formed in the outer side wall 5022 of the second fire cover 508, and the second fire hole 5081 inclines upwards along the direction from inside to outside. The included angle between the first fire hole 5071 and the horizontal direction is a first included angle, and the included angle between the second fire hole 5081 and the horizontal direction is a second included angle, wherein the first included angle is not equal to the second included angle.

In this embodiment, the first fire hole 5071 and the second fire hole 5081 are inclined, so that the ejection capacity of the first fire hole 5071 and the second fire hole 5081 to the secondary air can be improved, and the replenishment amount of the secondary air can be increased. Because first fire hole 5071 and second fire hole 5081 set up relatively, in this embodiment, first contained angle and second contained angle are different for first fire hole 5071 and second fire hole 5081's the direction of being fired staggers, avoid the flame coincidence, can avoid two fire holes to compete for the air simultaneously, reduce the flue gas value.

Optionally, the angle of the first included angle is greater than the angle of the second included angle.

In this embodiment, since the first fire cover 507 is located at the outer side and the fire power at the first fire hole 5071 is relatively strong, the first fire hole 5071 is inclined at a relatively large angle, and thus more secondary air can be introduced to ensure sufficient combustion of the first fire hole 5071.

Optionally, the first included angle is in the range of 45 ° to 60 °.

In this embodiment, when the range of the first included angle is smaller than 45 °, the inclination angle of the first fire hole 5071 is too small, which easily causes the flame at the first fire hole 5071 to leave the flame, and is not convenient for the injection of the first fire hole 5071 to the secondary air. When the angle of the first included angle is larger than 60 degrees, the inclination angle of the first fire hole 5071 is too large, so that the flame range of the first fire hole 5071 is smaller, the gas flow rate is too high, and the full combustion of flame is not facilitated.

Alternatively, the first included angle may be 45 °, 50 °, 55 °, 60 °.

Optionally, the second included angle is in the range of 35 ° to 50 °.

In this embodiment, when the range of the second included angle is smaller than 35 °, the inclination angle of the second fire hole 5081 is too small, which easily causes the flame at the second fire hole 5081 to leave the flame, and is not convenient for the injection of the second fire hole 5081 to the secondary air. When the angle of second contained angle is greater than 55, the inclination of second fire hole 5081 is too big for the flame scope of second fire hole 5081 department is less, and the gas velocity of flow is too fast, is unfavorable for the abundant burning of flame.

Alternatively, the first included angle may be 35 °, 45 °, 50 °, 55 °.

Alternatively, as shown in fig. 10, the number of the first fire holes 5071 is multiple, and the multiple first fire holes 5071 are sequentially arranged at intervals in the circumferential direction of the first fire cover 507; the number of the second fire holes 5081 is multiple, and the plurality of second fire holes 5081 are sequentially arranged at intervals along the circumferential direction of the second fire cover 508; wherein, along the circumference of the fire cover component, the first fire holes 5071 and the second fire holes 5081 are staggered.

In this embodiment, the first fire holes 5071 and the second fire holes 5081 are alternately arranged, so that the first fire holes 5071 and the second fire holes 5081 are further prevented from intersecting in the circumferential direction of the fire cover 50, thereby preventing flames at the first fire holes 5071 and the second fire holes 5081 from overlapping, and reducing smoke values.

Optionally, the height of the first fire holes 5071 is the same as or similar to the height of the second fire holes 5081.

In this embodiment, the first fire holes 5071 and the second fire holes 5081 have the same or similar height, so that the annular flames at the first fire holes 5071 and the second fire holes 5081 have the same or similar height, thereby improving the heating uniformity of cooking utensils such as cookers.

Optionally, as shown in fig. 11, the first fire lid 507 further includes a first reinforcing rib 5041, the first reinforcing rib 5041 is located in the first air mixing chamber and extends in a radial direction of the first fire lid 507, and the first reinforcing rib 5041 is connected between two opposite wall surfaces of the first air mixing chamber.

In this embodiment, the first reinforcing rib 5041 is located in the first gas mixing chamber, so that on one hand, the strength of the first fire cover 507 can be increased, and on the other hand, the turbulence effect of the gas flow in the first gas mixing chamber can be improved, and the circumferential uniformity of the gas flowing in the first gas mixing chamber can be improved.

Optionally, the number of the first reinforcing ribs 5041 is plural, and the plural first reinforcing ribs 5041 are sequentially disposed in the first air mixing chamber at intervals in the circumferential direction of the first fire lid 507.

In this embodiment, the number of the first ribs 5041 is plural, so that the effect of the first ribs 5041 is increased, and the strength of the first burner cap 507 and the uniformity of the flow of the gas flowing in the circumferential direction are improved.

Optionally, as shown in fig. 6, the second fire lid 508 further includes a second rib 5042, the second rib 5042 is located in the second air mixing chamber and extends along the radial direction of the second fire lid 508, and the second rib 5042 is connected between two opposite wall surfaces of the second air mixing chamber.

In this embodiment, the second reinforcing rib 5042 is located in the second gas mixing chamber, so that on one hand, the strength of the second fire cover 508 can be increased, and on the other hand, the turbulence effect of the gas flow in the second gas mixing chamber can be improved, and the circumferential uniformity of the gas flowing in the second gas mixing chamber can be improved.

Optionally, the number of the second reinforcing ribs 5042 is plural, and the plural second reinforcing ribs 5042 are sequentially provided in the second air mixing chamber at intervals in the circumferential direction of the second fire lid 508.

In this embodiment, the number of the second ribs 5042 is plural, which increases the effect of the second ribs 5042 and improves the strength of the second fire cover 508 and the uniformity of the flow of the gas flowing in the circumferential direction.

Optionally, the first fire cover 507 and the second fire cover 508 are covered above the gas panel 10, and together with the gas panel 10, define a secondary air flow channel 70, and the secondary air flow channel 70 is located between the first fire cover 507 and the second fire cover 508, wherein the first fire hole 5071 and the second fire hole 5081 are both located in the secondary air flow channel 70. This can increase the amount of secondary air supply at the first and second fire ports 5071 and 5081 to ensure that the flames at the first and second fire ports 5071 and 5081 can burn sufficiently to reduce smoke levels.

Optionally, as shown in fig. 1, the fire lid assembly further includes a third fire lid 509, the second fire lid 508 is sleeved outside the third fire lid 509, the third fire lid 509 defines a third gas mixing chamber, and an outer sidewall 5022 of the third fire lid 509 is provided with a fifth fire hole 5091 communicated with the third gas mixing chamber. The outer sidewall 5022 of the first fire cap 507 is provided with a third fire hole 5072 communicated with the first gas mixing chamber, and the inner sidewall 5021 of the second fire cap 508 is provided with a fourth fire hole 5082 communicated with the second gas mixing chamber.

In this embodiment, the first fire cover 507, the second fire cover 508 and the third fire cover 509 can form a five-ring fire mode together, wherein the first fire cover 507 and the second fire cover 508 are located at the outer ring and the middle ring, so that the fire power is large and the fire power range is large. Therefore, the first fire hole 5071 and the second fire hole 5081 can effectively reduce the smoke value by the arrangement in the above embodiment.

In one embodiment, the first fire lid 507 includes the outer fire lid 20, the first fire hole 5071 includes an outer ring inner fire hole 2012, the third fire hole 5072 includes an outer ring outer fire hole 2011, and the first plenum includes the outer ring plenum 201. The second fire cover 508 includes a middle fire cover 30, the second fire holes 5081 include inner ring outer fire holes, and the fourth fire holes 5082 include middle ring inner fire holes 3011. The second plenum comprises a mid-ring plenum 301. The fifth fire hole 5091 includes an inner fire hole 402, and the third air mixing chamber includes an inner air mixing chamber 401.

As shown in fig. 6, in the case that the gas mixing chamber 501 extends annularly along the circumferential direction of the fire cap 50, at least one inner wall surface of the gas mixing chamber 501 is configured with a protrusion 5025 and a groove 5024, the protrusion 5025 is provided with a fire hole communicated with the gas mixing chamber 501, and the fire hole penetrates through the protrusion 5025 and a side wall (the side wall refers to one or more of an inner side wall 5021, an outer side wall 5022 and a top wall 5023 of the fire cap 50) of the fire cap 50, so as to realize combustion of the fire cap 50; wherein, along the circumference of the fire cover 50, the protruding portion 5025 and the groove portion 5024 are sequentially arranged.

In this embodiment, the groove portion 5024 can reduce the unnecessary material thickness of the fire cover 50. The weight of the fire cover 50 and the manufacturing cost of the fire cover 50 are reduced. The protruding part 5025 of the fire cover 50 is used for setting the fire hole of the fire cover 50 to ensure the depth of the fire hole, and further improve the fire stability and the service time of the fire hole. The provision of the groove portion 5024 can increase the space of the gas mixing chamber 501, and when the gas flows in the gas mixing chamber 501, more vortices can be formed in the groove portion 5024. This can slow down the flow rate of the air in the air-fuel mixture chamber 501, and improve the uniformity of the air-fuel flow in the circumferential direction of the fire lid 50. So that the gas outlet along the fire hole arranged along the circumferential direction of the fire cover 50 is more uniform, and further the annular flame of the fire cover 50 is more uniform, so as to improve the heating effect of the appliances such as cookware.

Optionally, the number of the protruding portions 5025 and the groove portions 5024 is multiple, and the protruding portions 5025 and the groove portions 5024 are sequentially arranged in a staggered manner along the circumferential direction of the fire cover 50.

In this embodiment, the plurality of protrusions 5025 and the recessed portions 5024 are disposed in a staggered manner, and the fire holes are disposed in the protrusions 5025. It can be understood that: a groove portion 5024 is provided between every two adjacent protruding portions 5025, and each protruding portion 5025 is provided with one or more fire holes, that is, the groove portion 5024 is provided at the inner wall surface of the gas mixing chamber 501 without fire holes. This can increase the number of the groove portions 5024 in the gas mixing chamber 501, and further increase the number of vortices in the gas mixing chamber 501. By forming a large number of vortices, the flow velocity of the gas in the gas mixing chamber 501 can be further reduced, and the uniformity of the flow of the mixed gas in the circumferential direction can be improved.

Alternatively, as shown in fig. 6, the protruding portion 5025 defines an avoiding channel 5026, and the avoiding channel 5026 is communicated with the groove portion 5024, so that the air flow in the air mixing chamber 501 flows along the circumferential direction of the fire cover 50.

In this embodiment, in order to ensure that the gas in the gas mixing chamber 501 can flow along the circumferential direction of the fire cover 50, the protruding portion 5025 needs to define an avoiding channel 5026 while setting the fire hole, so as to ensure that the gas can flow through the protruding portion 5025 and the groove portion 5024 in sequence. Specifically, the avoiding channel 5026 extends along the circumferential direction of the fire cover 50 to achieve communication between the avoiding channel 5026 and the groove part 5024.

Optionally, a length of the groove portion 5024 is greater than a length of the protrusion 5025 in the circumferential direction of the fire cover 50.

In this embodiment, the length of any one of the groove portions 5024 along the circumferential direction of the fire cover 50 is greater than the length of one of the protruding portions 5025 along the circumferential direction of the fire cover 50, so that the area of a vortex can be increased, and the flow uniformity of the gas in the gas mixing chamber 501 can be further increased.

Optionally, the fire lid 50 further comprises a rib 504, the rib 504 is located in the groove portion 5024 and extends in the radial direction of the fire lid 50, and the rib 504 is supported between two opposite wall surfaces of the air mixing chamber 501.

In this embodiment, the reinforcing ribs 504 can increase the strength of the fire cover 50, improve the turbulence effect of the fuel gas in the gas mixing chamber 501, and improve the uniformity of circumferential flow.

Optionally, the number of the reinforcing ribs 504 is multiple, and at least one reinforcing rib 504 is arranged in each groove portion 5024.

In this embodiment, the plurality of connecting ribs 503 can enhance the strength of the fire cover 50, increase the turbulence effect, and improve the uniformity of the gas flow. One or more reinforcing ribs 504 can be arranged in each groove portion 5024, the reinforcing ribs can be arranged according to the size, the shape and the like of the fire cover 50, and the arrangement mode of the reinforcing ribs 504 belongs to the optional embodiment of the application.

Optionally, the fire cover 50 further includes a connection portion 505, the connection portion 505 is disposed in the groove portion 5024, and the connection portion 505 is used for connecting with the air distributor 10. Specifically, the gas panel 10 is provided with a connection fitting portion 107, and the fire cover 50 is connected to the gas panel 10 when the connection portion 505 is fitted to the connection fitting portion 107.

Alternatively, the connection portion 505 is detachably connected to the connection fitting portion 107. So as to facilitate the detachment and installation of the fire cover 50 from the gas distribution plate 10, thereby facilitating the cleaning, maintenance and replacement of the fire cover 50 and the gas distribution plate 10.

Illustratively, the connecting portion 505 includes a third screw hole 5051, and the connecting fitting portion 107 includes a first screw hole 1071 and a second screw hole 1072, through which screws pass the first screw hole 1071, the second screw hole 1072 and the third screw hole 5051, so as to connect the fire cover 50 with the upper air distribution plate and the lower air distribution plate 101.

Alternatively, the connection portion 505 and the connection fitting portion 107 may be fixedly connected. Such as welding or integral molding.

Alternatively, the boss 5025 may be provided with one fire hole or a plurality of fire holes, and when the boss 5025 is provided with a plurality of fire holes, the plurality of fire holes of each boss 5025 may form fire hole groups 5013, that is, a groove part 5024 is provided between every two adjacent fire hole groups 5013. Like this, a plurality of fire hole group 5013 set up along the circumference interval of fire lid 50, can enough guarantee that fire lid 50 forms annular flame, can also reduce the distance between the adjacent fire hole group 5013, reduce the flue gas.

Alternatively, as shown in fig. 5 and 6, the inner sidewall 5021, the outer sidewall 5022 and the top wall 5023 of the fire cap 50 together enclose the air mixing chamber 501, and thus, the inner wall surface of the air mixing chamber 501 includes the inner wall surface of the inner sidewall 5021, the inner wall surface of the outer sidewall 5022 and the inner wall surface of the top wall 5023. A protruding portion 5025 and a groove portion 5024 are configured on the inner wall surface of the air mixing chamber 501 corresponding to the inner wall 5021 and the top wall 5023.

In this embodiment, inside wall 5021 that inside wall 5021 and roof 5023 correspond constructs bellying 5025 and recess part 5024, that is, the material thickness of roof 5023 and inside wall 5021 of fire lid 50 reduces, and inside wall 5021 and/or roof 5023 are located to the fire hole, because the fire lid 50 burning, outside firepower is more fierce like this, inboard firepower is less, consequently, set up bellying 5025 and fire hole at inside wall 5021 and/or roof 5023 of fire lid 50, can rationally distribute the gas that mixes the gas in the gas chamber, avoid the fire hole of inside wall 5021 and/or roof 5023 and the fire hole in the outside to compete for the air, lead to outside fire hole 5011 firepower not enough.

Alternatively, the fire holes sequentially penetrate the protrusions 506 and the inner sidewall 5021, and the fire holes are inclined upward in the flow direction of the air current in the fire holes. The inclined arrangement of fire hole can increase the ejection effect of fire hole department gas and flame to secondary air to increase secondary air's make-up volume.

Optionally, outer fire holes have been seted up to the lateral wall 5022 of fire lid 50, and the quantity in outer fire hole is a plurality of, and a plurality of outer fire holes set up along the circumference of fire lid 50 interval in proper order, and outer fire hole and fire hole all communicate with gas mixing chamber 501. That is to say, the gas in the gas mixing chamber 501 can flow simultaneously to outer fire hole and fire hole department, and then makes the setting of concave part 5024 also can increase outer fire hole along the play fire degree of consistency of fire lid 50 circumference.

Optionally, the protruding portion 5025 is provided with fire hole groups 5013, and the protruding portions 5025 correspond to the fire hole groups 5013 in the same number one by one. This can increase the fire exit area of the fire hole at the boss 5025. Thus, the circumferential length of the groove portion 5024 is greater than that of the protruding portions 5025, and the fire hole groups 5013 of the protruding portions 5025 can form annular flames to achieve uniform heating of the fire cover 50. Other effects of the fire hole set 5013 are the same as those described above, and are not described in detail here.

In some alternative embodiments, the fire cover 50 includes the middle fire cover 30, the middle fire cover 30 is located between the outer fire cover 20 and the inner fire cover 40, and the middle ring gas mixing chamber 301 of the middle fire cover 30 is provided with the protruding portion 5025 and the groove portion 5024 of the embodiment, so that the uniformity of the gas in the middle ring gas mixing chamber 301 flowing along the circumferential direction can be improved. Alternatively, the protruding portion 5025 may be provided on the inner wall surface of the gas mixing chamber 501 corresponding to the top wall 5023 and the inner wall 5021 of the middle fire cap 30. Optionally, the fire holes include a middle ring inner fire hole 3011, and the middle ring inner fire hole 3011 sequentially penetrates through the boss 5025 and the inner sidewall 5021 of the middle fire cover 30, wherein the middle ring inner fire hole 3011 includes a plurality of fire hole sets 5013, and each boss 5025 is provided with one fire hole set 5013. A groove portion 5024 is formed between the adjacent fire hole groups 5013 to increase the number of vortexes in the middle ring air mixing chamber 301, and improve the uniformity of the air flow in the middle ring air mixing chamber 301 flowing along the circumferential direction. The specific arrangement of the fire hole groups 5013 is the same as the fire hole groups 5013 in the present application, and will not be described herein again.

In some alternative embodiments, as shown in fig. 8 and 9, the fire cover 50 includes a fire cover body 502 and a protrusion 506, the fire cover body 502 defines a gas mixing chamber 501, the fire cover body 502 is provided with a plurality of first fire holes 50151, the first fire holes 50151 communicate the gas mixing chamber 501 with the outside, and the plurality of first fire holes 50151 are sequentially arranged at intervals along the circumferential direction of the fire cover body 502; the projection 506 is projected on the inner wall surface of the gas mixing chamber 501. Wherein, the junction of the protrusion 506 and the fire cover body 502 is provided with at least one second fire outlet 50152. The first and second fire exit holes 50151 and 50152 are provided along the circumference of the fire cover 50 to allow the fire cover 50 to outgas along the circumference thereof.

In this embodiment, due to the complexity of the fire lid 50, the interior of the air mixing chamber 501 may be configured with an inevitable protrusion 506, and the protrusion 506 may be used to achieve various functions such as connection of the fire lid 50 or fire. This results in the junction of protruding 506 and fire lid body 502 to have out the fire blind area, and in the correlation technique, do not generally establish the fire hole at protruding 506, this can lead to fire lid 50 not even outgas in protruding 506 department, and then lead to the inhomogeneous flame of fire lid 50. The protrusion 506 is located in the gas mixing chamber 501, and is used for realizing the related functions of the fire lid 50, for example, the protrusion 506 may be provided with a connecting portion 50, a fire outlet or a reinforcing rib 504, and the like, so as to realize multiple functions of the fire lid 50. The protrusion 506 and the fire cover body 502 are provided with second fire holes 50152, and the second fire holes 50152 and the first fire holes 50151 of the fire cover body 502 are arranged along the circumference of the fire cover 50. It can be understood that: the second fire outlet 50152 fills the blank of the first fire outlet 50151 at the protrusion 506, so that the first fire outlet 50151 and the second fire outlet 50152 both give off air in the circumferential direction of the fire cover 50, the uniformity of the given off air in the circumferential direction of the fire cover 50 is improved, and the uniformity of the flame in the circumferential direction of the fire cover 50 is further improved.

Optionally, as shown in fig. 14, the fire cap 50 is further provided with flame holding grooves 5016, the flame holding grooves 5016 extending in the circumferential direction of the fire cap body 502, and the flame holding grooves 5016 penetrating the fire cap body 502 and the protrusions 506 in the circumferential direction of the fire cap 50. The second flame exit holes 50152 include flame stabilizing holes 5015, wherein the flame stabilizing holes 5015 are located below the flame stabilizing slots 5016, and the flame stabilizing slots 5016 are communicated with outlet ends of the flame stabilizing holes 5015.

In this embodiment, the flame stabilizing hole 5015 communicates with the flame stabilizing slot 5016 and the gas mixing chamber 501 to provide gas to the flame stabilizing slot 5016, thereby realizing the flame stabilizing function of the flame stabilizing slot 5016. Since the flame stabilizing grooves 5016 extend in the circumferential direction of the flame cover 50, the flame stabilizing holes 5015 also need to be sequentially arranged in the circumferential direction of the flame cover 50. The flame stabilizing holes 5015 are also arranged at the connection part of the protrusion 506 and the fire cover body 502, so that the air outlet uniformity of the flame stabilizing holes 5015 can be improved, and the stability of flame of the flame stabilizing grooves 5016 in the circumferential direction of the fire cover 50 can be further ensured.

Alternatively, as shown in fig. 14, the flame stabilizing holes 5015 are inclined toward the inside of the protrusion 506 in the circumferential direction of the fire cover 50 from the bottom up direction.

In this embodiment, since the flame stabilizing holes 5015 are located below the flame stabilizing slots 5016, the flame stabilizing holes 5015 need to extend from bottom to top to achieve communication with the flame stabilizing slots 5016. Meanwhile, the flame stabilizing holes 5015 are inclined towards the inner part of the protrusion 506 along the circumferential direction of the flame cover 50 from bottom to top, so that the flame stabilizing holes 5015 can give out air at the part close to the center of the protrusion 506 as much as possible, the air outlet uniformity of the flame stabilizing holes 5015 in the circumferential direction of the flame cover 50 is improved, and the air outlet uniformity of the flame stabilizing grooves 5016 is further improved.

Optionally, the protrusion 506 is provided with a connecting portion 505, and the connecting portion 505 is used for connecting with the connecting matching portion 107 of the air distribution plate 10. The arrangement of the protrusion 506 and the second fire hole 50152 can not only realize the connection between the fire cover 50 and the air distribution plate 10, but also prevent the protrusion 506 from having no fire hole for air outlet.

Optionally, the protrusion 506 may include a third screw hole 5051, that is, a fire hole is formed at a connection portion of the third screw hole 5051 and the fire cover body 502, so that the uniformity of air outlet at the connection portion of the third screw hole 5051 and the fire cover body 502 can be improved. Alternatively, the number of the connecting portions 505 is plural, and the connecting portions 505 and the connection fitting portions 107 are the same in number and correspond to each other. Connecting portion 505 sets up along the circumference of fire lid 50 interval in proper order, and the protruding 506 that each connecting portion 505 corresponds all is equipped with one or more fire hole with the junction of fire lid body 502, can further improve the homogeneity of giving vent to anger of protruding 506 department fire hole.

Optionally, when the protrusion 506 is provided with the connecting portion 505, the flame holes include flame stabilizing holes 5015, that is, the flame stabilizing holes 5015 are provided at the connecting portion of the protrusion 506 and the fire cover body 502.

Optionally, the ignition hole 602 penetrates through the protrusion 506 and the fire cover body 502, and the ignition hole 602 communicates the air mixing chamber 501 and the outside.

In this embodiment, the ignition hole 602 penetrates the protrusion 506 and the fire lid body 502, and it can be understood that: the material thickness of the fire cover 50 at the ignition hole 602 is increased by the protrusion 506, so that the hole depth of the ignition hole 602 is ensured, and the service life of the fire cover 50 at the ignition hole 602 is ensured. The corresponding connection part of the protrusion 506 provided with the ignition hole 602 and the fire cover body 502 is also provided with a fire hole to ensure the air outlet uniformity of the flame stabilizing slot 5016 at the ignition hole 602.

Optionally, when the protrusion 506 is provided with the ignition hole 602, the flame hole includes a flame stabilizing hole 5015, that is, the flame stabilizing hole 5015 is provided at the junction of the protrusion 506 and the fire cover body 502.

Alternatively, the protrusion 506 is provided at an inner wall surface of the air mixing chamber 501 corresponding to the outer side wall 5022 of the fire cover 50, and the ignition hole 602 is inclined toward the center of the protrusion 506 along the circumferential direction of the fire cover 50 in the inside-to-outside direction.

In this embodiment, the material thickness at the ignition hole 602 is increased, and the ignition hole 602 is obliquely arranged, so that the hole depth of the ignition hole 602 can be further increased, and the service life of the fire cover 50 at the ignition hole 602 is prolonged.

Alternatively, the number of the ignition holes 602 is plural, and at least two ignition holes 602 among the plurality of ignition holes 602 are provided at intervals in the circumferential direction of the fire cover 50.

The arrangement of a plurality of ignition holes 602 can increase the outflow of the fuel gas at the ignition holes 602 to improve the ignition efficiency. And a plurality of ignition holes 602 all extend towards the inside of protruding 506, can reduce the distance between the adjacent ignition hole 602 to improve the collection effect of the gas that ignition hole 602 flows out, improve the success rate of igniteing.

In some alternative embodiments, the fire cover 50 provided by the embodiments of the present disclosure may be the inner fire cover 40, the middle fire cover 30 and/or the outer fire cover 20, and when the fire cover 50 is provided with the protrusion 506 having the connection portion 505 or the ignition hole 602, a fire hole may be provided at a connection portion of the protrusion 506 and the fire cover body 502, and particularly, a flame stabilizing hole 5015 may be provided to improve the uniformity of the air outlet of the flame stabilizing hole 5015 of the fire cover 50.

Optionally, the inner fire cover 40 is provided with an inner ring flame holding groove 406, the inner ring flame holding groove 406 being located below the inner fire hole 402, the inner ring flame holding groove 406 being used to hold the flame in the inner fire hole 402.

Optionally, the inner fire cover 40 is further provided with a nose protrusion 403, the nose protrusion 403 is protruded from the outer sidewall 5022 of the inner fire cover 40, the nose protrusion 403 is provided with a notch 404 and a thermocouple hole 4041 which are communicated with the inner air mixing chamber 401, the thermocouple 405 corresponds to the nose protrusion 403, and the nose protrusion 403 is used for ensuring that the thermocouple hole 4041 corresponds to the thermocouple 405 so as to ensure the normal operation of the thermocouple 405.

Optionally, the bottom of the inner fire cover 40 is provided with a second connecting portion, the lower gas distribution plate 101 is provided with a second connecting matching portion, and when the second connecting portion is connected with the second connecting matching portion, the inner fire cover 40 is connected with the lower gas distribution plate 101.

Optionally, in the case that the gas distribution plate 10 includes the upper gas distribution plate 106, the upper gas distribution plate 106 is provided with an escape hole to facilitate the connection of the inner fire cover 40 with the lower gas distribution plate 101.

Alternatively, the second connecting portion and the second connecting fitting portion may be connected by screws.

Optionally, the second connecting portion is provided with a limiting portion, the second connecting matching portion is provided with a limiting matching portion, and when the limiting portion is matched with the limiting matching portion, the inner fire cover 40 can be limited to rotate relative to the gas distribution plate 10.

Alternatively, in the case that the gas distribution plate 10 includes the upper gas distribution plate 106, the inner fire cover 40 and the upper gas distribution plate 106 are hermetically connected through the end surface. The outer fire cover 20 and the middle fire cover 30 are connected with the upper gas distributing plate 106 in a sealing way through end faces.

The embodiment of the present disclosure also provides a gas stove, including the burner 100 of any one of the above embodiments.

The embodiment of the present disclosure further provides a gas stove, which includes the burner 100 according to any one of the above embodiments, so that the burner 100 according to any one of the above embodiments has beneficial effects, and details are not repeated herein.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A burner, comprising:

the inner fire cover defines an inner air mixing chamber and is provided with an inner fire hole communicated with the inner air mixing chamber;

the middle fire cover is sleeved on the outer side of the inner fire cover, the middle fire cover defines a middle ring gas mixing chamber, a middle ring inner fire hole and a middle ring outer fire hole which are communicated with the middle ring gas mixing chamber are formed in the middle fire cover, and the middle ring outer fire hole is positioned on the outer side of the middle ring inner fire hole;

the outer fire cover is sleeved outside the middle fire cover, an outer ring gas mixing chamber is defined by the outer fire cover, an outer ring inner fire hole and an outer ring outer fire hole which are communicated with the outer ring gas mixing chamber are formed in the outer fire cover, and the outer ring outer fire hole is positioned outside the outer ring inner fire hole;

the ignition needle is positioned between the middle fire cover and the outer fire cover and used for igniting the middle ring outer fire hole, after the middle ring outer fire hole is ignited, the flame at the middle ring outer fire hole can be sequentially transmitted to the middle ring inner fire hole and the inner fire hole, and the flame at the middle ring outer fire hole can also be sequentially transmitted to the outer ring inner fire hole and the outer ring outer fire hole.

2. The burner of claim 1, further comprising:

the ignition cap is arranged on the outer side wall of the middle fire cover and extends towards the direction of the outer fire cover;

the ignition cap and the ignition needle are arranged correspondingly to realize the ignition of the ignition needle to the middle ring outer fire hole.

3. The burner of claim 2,

the outer side wall of the middle fire cover is also provided with an ignition hole communicated with the middle ring gas mixing chamber, the ignition hole is positioned below the ignition cap, and the ignition hole and the ignition needle are correspondingly arranged so as to be matched with the ignition needle and the ignition cap for ignition;

the outer wall surface of the middle fire cover corresponding to the ignition hole is inwards recessed to form an avoiding groove, and the avoiding groove is used for avoiding the ignition needle.

4. The burner of claim 3,

the middle fire cover is also provided with a middle ring flame stabilizing groove communicated with the middle ring gas mixing chamber, the middle ring flame stabilizing groove extends along the circumferential direction of the middle fire cover, and the middle ring flame stabilizing groove is positioned below the middle ring outer fire hole;

the ignition hole is positioned above the middle ring flame stabilizing groove, and after the ignition hole is ignited, the flame at the ignition hole ignites the middle ring outer flame hole through the middle ring flame stabilizing groove along the circumferential direction of the middle flame cover.

5. The burner of claim 1,

the middle fire cover is also provided with a first fire transfer groove communicated with the middle ring gas mixing chamber, and the first fire transfer groove is used for transferring fire between the middle ring inner fire hole and the middle ring outer fire hole;

the first fire transmission grooves are multiple in number and are arranged along the circumferential direction of the middle fire cover at intervals in sequence.

6. The burner of claim 5,

the well fire lid includes:

the first inner side wall is annular, is provided with the middle ring inner fire hole and is provided with a first fire transmission hole communicated with the middle ring gas mixing chamber;

the first outer side wall is annular, is positioned on the outer side of the first inner side wall, is provided with the middle ring outer fire hole, and is provided with a second fire transfer hole communicated with the middle ring gas mixing chamber;

the first top wall is annular and is connected between the upper end of the first inner side wall and the upper end of the first outer side wall, and the first inner side wall, the first outer side wall and the first top wall jointly enclose the middle ring gas mixing chamber;

the first fire transfer groove sequentially penetrates through the first inner side wall, the first top wall and the first outer side wall, and is communicated with the first fire transfer hole and the second fire transfer hole;

first even discharge orifice has been seted up to first fire transfer groove upper end opening, two relative lateral walls of first fire transfer groove opening part, first even discharge orifice upwards extends, the lower extreme in first even discharge orifice with the zhonghuan air mixing chamber is linked together, the upper end in first even discharge orifice is sealed.

7. The burner of claim 1,

the outer fire cover is provided with an outer ring inner flame stabilizing groove communicated with the outer ring gas mixing chamber, and the outer ring inner flame stabilizing groove is positioned below the outer ring inner fire hole and extends along the circumferential direction of the outer fire cover; and/or the presence of a gas in the gas,

the outer fire cover is further provided with an outer ring outer flame stabilizing groove communicated with the outer ring gas mixing chamber, and the outer ring outer flame stabilizing groove is located below the outer fire hole of the outer ring and extends along the circumferential direction of the outer fire cover.

8. The burner of claim 1, wherein the outer fire cover comprises:

the second inner side wall is annular, is provided with an inner fire hole of the outer ring and is provided with a third fire transfer hole communicated with the outer ring gas mixing chamber;

the second outer side wall is annular, is positioned on the outer side of the second inner side wall, is provided with the outer ring outer fire hole, and is provided with a fourth fire transfer hole communicated with the outer ring gas mixing chamber;

the second top wall is annular and is connected between the upper end of the second inner side wall and the upper end of the second outer side wall, and the second inner side wall, the second outer side wall and the second top wall jointly enclose the outer ring gas mixing chamber;

the outer fire cover is provided with a second fire transfer groove, the second fire transfer groove sequentially penetrates through the second inner side wall, the second top wall and the second outer side wall, and the second fire transfer groove is communicated with the outer ring gas mixing chamber, the third fire transfer hole and the fourth fire transfer hole;

the second passes fire groove upper end opening, the even discharge orifice of second has been seted up to two relative lateral walls of second pass fire groove opening part, the even discharge orifice of second upwards extends, the lower extreme in the even discharge orifice of second with outer loop gas mixing chamber is linked together, the upper end in the even discharge orifice of second seals.

9. The burner according to any one of claims 1 to 8, further comprising:

the gas distribution plate is positioned below the middle fire cover and the outer fire cover, the gas distribution plate, the middle fire cover and the outer fire cover jointly define a first secondary air flow channel, and the first secondary air flow channel is positioned between the middle fire cover and the outer fire cover;

and the middle ring outer fire hole and/or the outer ring inner fire hole are/is positioned in the first secondary air flow channel and are communicated with the first secondary air flow channel.

10. A gas burner comprising a burner as claimed in any one of claims 1 to 9.

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