阅读说明：本技术 一种实现宽幅燃烧的燃气灶具 (Gas stove capable of realizing wide combustion ) 是由 孙红梅 朱鑫 韩亚峰 于 2019-11-22 设计创作，主要内容包括：本发明公开了一种实现宽幅燃烧的燃气灶具,其炉头包括外环火头部混合腔、中环火头部混合腔、内环火头部混合腔,内环火头部混合腔位于中环火头部混合腔内；其外火盖呈圆环形罩扣在外环火头部混合腔的上方；其内火盖在顶面上开设有内环火孔,在侧壁上开设有中环火孔,所述顶面与侧壁围成的腔室被分隔成独立的两部分,其中一部分为与内环火孔连通的内环火混气腔,另外一部分为与中环火孔连通的中环火混气腔；内火盖罩扣在中环火头部混合腔的上方,罩扣后,内火盖的内环火混气腔与炉头的内环火头部混合腔连通,内火盖的中环火混气腔与炉头的中环火头部混合腔连通。所述灶具可以降低火力调节的下限值,并可保证火焰在微火状态下稳定燃烧。(The invention discloses a gas stove for realizing wide combustion, wherein a burner of the gas stove comprises an outer ring fire head mixing cavity, a middle ring fire head mixing cavity and an inner ring fire head mixing cavity, wherein the inner ring fire head mixing cavity is positioned in the middle ring fire head mixing cavity; the outer fire cover is in a circular ring shape and covers and buckles the upper part of the outer fire head mixing cavity; the inner fire cover is provided with an inner ring fire hole on the top surface, a middle ring fire hole on the side wall, and a cavity enclosed by the top surface and the side wall is divided into two independent parts, wherein one part is an inner ring fire mixed air cavity communicated with the inner ring fire hole, and the other part is a middle ring fire mixed air cavity communicated with the middle ring fire hole; the inner fire cover is buckled above the middle ring fire head mixing cavity, after the cover is buckled, the inner ring fire mixing cavity of the inner fire cover is communicated with the inner ring fire head mixing cavity of the furnace end, and the middle ring fire mixing cavity of the inner fire cover is communicated with the middle ring fire head mixing cavity of the furnace end. The stove can reduce the lower limit value of firepower adjustment and can ensure that flame can be stably combusted in a micro-fire state.)

1. A gas cooker that realizes broad combustion, comprising:

a stove body;

a burner mounted on the burner body for forming a flame;

characterized in that the burner comprises:

a burner comprising an outer ring fire channel having an outer ring fire head mixing cavity, a middle ring fire channel having a middle ring fire head mixing cavity, and an inner ring fire channel having an inner ring fire head mixing cavity, the inner ring fire head mixing cavity being located within the middle ring fire head mixing cavity;

a fire divider mounted on the burner head;

the outer fire cover is annular and is arranged on the fire distributor and covers and buckles the upper part of the mixing cavity at the head part of the outer ring fire;

the inner fire cover comprises a top surface and a cylindrical side wall, an inner ring fire hole is formed in the top surface, and a middle ring fire hole is formed in the side wall; the cavity enclosed by the top surface and the side wall is divided into two independent parts, namely an inner ring fire air mixing cavity communicated with the inner ring fire hole and a middle ring fire air mixing cavity communicated with the middle ring fire hole; the inner fire cover is arranged on the fire distributor and is covered and buckled above the middle ring fire head mixing cavity, after the cover is buckled, the inner ring fire mixing cavity of the inner fire cover is communicated with the inner ring fire head mixing cavity of the furnace end, and the middle ring fire mixing cavity of the inner fire cover is communicated with the middle ring fire head mixing cavity of the furnace end.

2. The gas cooker for realizing wide-range combustion as claimed in claim 1, wherein the inner ring fire holes comprise a plurality of inner ring fire holes, the diameter of each inner ring fire hole is 1.5 mm-1.6 mm, the spacing distance between two adjacent inner ring fire holes is less than 1mm, and the total area of all the inner ring fire holes is 60mm²~70mm²In the meantime.

3. The gas cooker for realizing wide combustion as claimed in claim 1, wherein an inner fire step surface protruding upward is formed on the top surface of the inner fire cover, the inner fire step surface includes a circular step surface located at the center of the top surface of the inner fire cover and a transition step surface extending from the circular step surface to the side wall of the inner fire cover, a fire transfer groove is opened on the transition step surface, the fire transfer groove extends to the side wall of the inner fire cover and is communicated with at least one middle fire hole; the inner ring fire holes are all formed in the surface of the inner ring fire step.

4. The gas cooker for realizing wide combustion as claimed in claim 3, wherein the middle fire hole communicating with the fire transfer groove includes at least one sensing needle fire hole, a thermocouple sensing needle for sensing the fire is installed on the burner, and the sensing needle fire hole is opposite to the thermocouple sensing needle after the inner fire cover is installed on the distributor.

5. The gas cooker for realizing wide combustion as claimed in claim 3, wherein a circle of circular ring bulge is formed on the outer edge of the top surface of the inner fire cover, and a diversion trench is formed on one side of the circular ring bulge opposite to the two sides of the circular ring bulge, and an ignition needle protection cover horizontally extending away from the inner fire cover is arranged on the other side of the circular ring bulge; an ignition needle is mounted on the furnace end, and after the inner fire cover is mounted on the distributor, the ignition needle is located under the ignition needle protective cover.

6. The gas cooker for realizing wide-range combustion as claimed in any one of claims 1 to 5, wherein the inner ring fire channel comprises an inner ring fire suction section, an inner ring fire mixing section and the inner ring fire head mixing cavity which are connected in sequence from outside to inside; the inner diameter of the inner ring fire mixing section is equal, and the length of the inner ring fire mixing section is 50 mm-80 mm.

7. Gas hob to enable broad burning according to claim 6,

the middle ring fire channel comprises a middle ring fire suction section, a middle ring fire mixing section, a middle ring fire diffusion section and a middle ring fire head mixing cavity which are sequentially connected from outside to inside, and the inner diameter of the middle ring fire diffusion section is larger than that of the middle ring fire mixing section;

the outer ring fire channel comprises an outer ring fire suction section, an outer ring fire mixing section, an outer ring fire diffusion section and an outer ring fire head mixing cavity which are sequentially connected from outside to inside, and the inner diameter of the outer ring fire diffusion section is larger than that of the outer ring fire mixing section;

wherein the central line of the inner ring fire channel and the horizontal central line of the furnace end form an included angle of 45 degrees; the central line of the middle fire channel is superposed with the horizontal central line of the furnace end; the central line of the outer ring fire channel is parallel to the horizontal central line of the furnace end.

8. Gas hob according to any one of the claims 1 to 5, characterized in, that the outer fire cover comprises:

the outer fire cover inner ring is integrally formed into an inclined plane which inclines downwards from outside to inside, a plurality of groups of inner fire holes are formed in the outer fire cover inner ring, the inner fire holes are distributed in a circumferential mode at equal intervals, each group of inner fire holes respectively comprise a plurality of sub fire holes which are linearly arranged, and the straight line of the sub fire holes which are linearly arranged forms an included angle of 50-70 degrees with the radial line direction of the outer fire cover at the position;

the outer fire cover outer ring extends vertically downwards along the outer edge of the outer fire cover inner ring, and a main fire hole is formed in the outer fire cover outer ring.

9. Gas hob to enable broad burning according to claim 8,

the included angle formed by inclined planes of the inner rings of the outer fire covers in a relative position relationship is 100-120 degrees;

each group of inner flame holes comprises 2-4 sub flame holes, and the diameter of each sub flame hole is 1.8-2 mm.

10. The gas cooker capable of realizing wide-range combustion as claimed in claim 8, wherein a plurality of groups of main fire holes are distributed on the outer ring of the outer fire cover, the main fire holes are distributed circumferentially at equal intervals, each main fire hole is inclined and extends from outside to inside downwards, and the central axis of each main fire hole forms an included angle of 20-40 degrees with the horizontal plane.

Technical Field

The invention belongs to the technical field of gas equipment, and particularly relates to a gas cooking stove, such as a gas stove, an integrated stove and the like.

Background

The gas range is a kitchen utensil which is heated by direct fire with liquefied petroleum gas, artificial gas, natural gas and other gas fuels. An existing gas cooker generally includes a cooker body, a burner, a pot holder, an adjusting knob, an igniter, a valve body assembly, an air inlet pipe, and the like. Wherein, the valve body subassembly is installed on the kitchen body to change the gas flow who carries to the combustor under the regulation of adjust knob, and then adjust the firepower size of combustor, in order to adapt to different culinary art scenes such as stir-fry, evaporate, stew, a kind of deep pot.

With the continuous development of gas cookers, the three-ring fire burner is adopted by more and more combustion cookers due to the advantages of high thermal efficiency, relatively uniform flame and the like. The existing three-ring fire burner mainly comprises a burner, a distributor, a fire cover and the like. Wherein, three mixing cavities are formed on the furnace end, which are respectively an outer ring fire mixing cavity, a middle ring fire mixing cavity and an inner ring fire mixing cavity. The three mixing chambers are respectively provided with fuel gas by three independent fuel gas channels so as to realize independent fire power adjustment. The distributor is installed on the furnace head, and the fire cover is installed on the distributor. In the existing three-ring fire burner, the fire cover is designed into three independent parts, namely an outer ring fire cover, a middle ring fire cover and an inner ring fire cover. The outer ring fire cover is communicated with an outer ring fire mixing cavity of the furnace end, the middle ring fire cover is communicated with a middle ring fire mixing cavity of the furnace end, and the inner ring fire cover is communicated with an inner ring fire mixing cavity of the furnace end.

When the combustor burns, its firepower regulating range is between 0.8kW ~5 kW. When the firepower of the burner is adjusted to the maximum, flames are generated on the three fire covers, and the firepower can reach 5 kW; when the firepower of the burner is adjusted to the middle fire, only the middle ring fire cover and the inner ring fire cover have fire; when the firepower of the burner is adjusted to a small fire, only the inner ring fire is covered by fire, the firepower can be only as low as 0.8kW at the minimum, and the problems that the small fire is not small enough and the flame is unstable in a small fire state exist.

Disclosure of Invention

The invention aims to provide a gas cooker, which enlarges the firepower adjusting range by reducing the lower limit value of firepower adjustment, realizes wide combustion and can ensure the stability of flame combustion in a micro-fire state.

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

a gas cooker for realizing wide combustion comprises a cooker body and a burner which is arranged on the cooker body and is used for forming flame; the combustor includes furnace end, distributor, outer fire lid and interior fire lid: the burner comprises an outer ring fire channel with an outer ring fire head mixing cavity, a middle ring fire channel with a middle ring fire head mixing cavity and an inner ring fire channel with an inner ring fire head mixing cavity, wherein the inner ring fire head mixing cavity is positioned in the middle ring fire head mixing cavity; the fire distributor is arranged on the furnace head; the outer fire cover is annular and is arranged on the fire distributor and covers and buckles the upper part of the mixing cavity at the head part of the outer ring fire; the inner fire cover comprises a top surface and a cylindrical side wall, an inner ring fire hole is formed in the top surface, and a middle ring fire hole is formed in the side wall; the cavity enclosed by the top surface and the side wall is divided into two independent parts, wherein one part is an inner ring fire air mixing cavity communicated with the inner ring fire hole, and the other part is a middle ring fire air mixing cavity communicated with the middle ring fire hole; the inner fire cover is arranged on the fire distributor and is covered and buckled above the middle ring fire head mixing cavity, after the cover is buckled, the inner ring fire mixing cavity of the inner fire cover is communicated with the inner ring fire head mixing cavity of the furnace end, and the middle ring fire mixing cavity of the inner fire cover is communicated with the middle ring fire head mixing cavity of the furnace end.

In order to improve the stability of the burner in the state of low temperature fire, the inner ring fire holes comprise a plurality of inner ring fire holes, so that the central dense fire holes are formed, the diameter of each inner ring fire hole is preferably 1.5 mm-1.6 mm, the spacing distance between every two adjacent inner ring fire holes is less than 1mm, and the total area of all the inner ring fire holes is preferably 60mm²~70mm²The more area betweenLarge, the smaller the flame intensity is, the shorter and clear flame, the increased primary air coefficient, more sufficient mixing with fuel gas, and more complete and stable flame combustion.

In order to enable flame of inner ring fire to be more concentrated, fully utilize a cavity formed by an inner fire cover to realize full mixing of gas and air and ensure that the combustion of firepower is stable at 0.2kW, an inner ring fire step surface protruding upwards is preferably formed on the top surface of the inner fire cover, the inner ring fire step surface comprises a circular step surface positioned at the center of the top surface of the inner fire cover and a transition step surface extending from the circular step surface to the side wall direction of the inner fire cover, a fire transfer groove is formed on the transition step surface, and the fire transfer groove extends to the side wall of the inner fire cover and is communicated with at least one middle ring fire hole; and the inner ring fire holes are all arranged on the surface of the inner ring fire step to form the heat-preservation fire with a honeycomb structure.

Preferably, the middle fire hole communicated with the fire transmission groove comprises at least one sensing needle fire hole, the furnace end is provided with a thermocouple sensing needle used for sensing the fire, and the sensing needle fire hole is opposite to the thermocouple sensing needle after the inner fire cover is arranged on the distributor. The induction needle fire hole is formed in the side wall of the inner fire cover, the induction needle fire hole is communicated with the middle ring fire head mixing cavity of the burner, and the fire transmission groove penetrates through the induction needle fire hole, so that the speed of flame transmitted from the induction needle fire hole to the inner ring fire hole can be increased, the ignition speed of the burner is increased, and the accuracy of detecting the fire intensity of the cooker by the thermocouple induction needle in a micro-fire state is ensured.

In order to prevent the liquid dropped from the cooker from gathering too much at the top of the inner fire cover to cause the inner ring fire to extinguish, the invention preferably forms a circle of circular ring bulges at the outer edge of the top surface of the inner fire cover, wherein one side of the two opposite sides of the circular ring bulges is provided with a flow guide groove, and the other side is provided with an ignition needle protective cover which horizontally extends in the direction away from the inner fire cover; an ignition needle is mounted on the furnace end, and after the inner fire cover is mounted on the distributor, the ignition needle is located under the ignition needle protective cover.

As a preferred structural design of the inner ring fire channel, the inner ring fire channel is preferably designed to comprise an inner ring fire suction section, an inner ring fire mixing section and an inner ring fire head mixing cavity which are sequentially connected from outside to inside; the inner diameter of the inner ring fire mixing section is equal, the inner diameter is preferably designed into a straight pipe, the inner diameter is preferably designed to be 10-12 mm, the length is lengthened, and the inner diameter is preferably designed to be 50-80 mm. The inner ring fire channel is designed without a diffusion section, and the length of the mixing section is increased, so that the gas and the air can be more completely mixed in the mixing section, the combustion of the combustor in a micro-fire state is more stable, and the one-step molding during the mold processing is facilitated.

As a preferable structural design of the middle ring fire channel, the middle ring fire channel comprises a middle ring fire suction section, a middle ring fire mixing section, a middle ring fire diffusion section and a middle ring fire head mixing cavity which are sequentially connected from outside to inside, and the inner diameter of the middle ring fire diffusion section is larger than that of the middle ring fire mixing section.

As a preferable structure design of the outer ring fire channel, the outer ring fire channel comprises an outer ring fire suction section, an outer ring fire mixing section, an outer ring fire diffusion section and an outer ring fire head mixing cavity which are sequentially connected from outside to inside, and the inner diameter of the outer ring fire diffusion section is larger than that of the outer ring fire mixing section.

In order to facilitate the pipe distribution design during the assembly of the burner, the invention preferably designs that the central line of the inner ring fire channel forms an included angle of 45 degrees with the horizontal central line of the burner, and the central line of the middle ring fire channel is superposed with the horizontal central line of the burner; the central line of the outer ring fire channel is parallel to the horizontal central line of the furnace end.

In order to improve the energy gathering effect of the combustor, the outer fire cover comprises an outer fire cover inner ring and an outer fire cover outer ring; the outer fire cover inner ring integrally forms an inclined plane inclined downwards from outside to inside, a plurality of groups of inner fire holes are formed in the outer fire cover inner ring, the inner fire holes are distributed in a circumferential mode at equal intervals, each group of inner fire holes respectively comprise a plurality of linearly arranged sub-fire holes, and the straight line where the plurality of linearly arranged sub-fire holes are located and the radial line direction of the outer fire cover at the position form an included angle of 50-70 degrees. The inner ring of the outer fire cover adopts the structural design, so that high-temperature heat energy can be reflected to the bottom of the pot through the inner ring of the horn-shaped outer fire cover, and the heat efficiency of the gas cooker is favorably improved.

Preferably, the included angle formed by inclined planes of the inner rings of the outer fire covers in a relative position relationship is between 100 degrees and 120 degrees; each group of inner flame holes comprises 2-4 sub flame holes, and the diameter of each sub flame hole is 1.8-2 mm. According to the invention, the inner flame is added to the inner ring of the outer flame cover, so that the uniformity of the temperature of the pot bottom can be improved.

In order to ensure that the maximum fire power of the burner can reach 5kW, the outer fire cover outer ring is vertically extended downwards along the outer edge of the outer fire cover inner ring, a plurality of groups of main fire holes are distributed on the outer fire cover outer ring, the main fire holes are distributed at equal intervals in a circumferential manner, each main fire hole is obliquely extended downwards from outside to inside, and the central axis of each main fire hole forms an included angle of 20-40 degrees with the horizontal plane, so that the span of a flame combustion surface of the burner in a high-fire state is improved.

Compared with the prior art, the invention has the advantages and positive effects that: according to the invention, the inner ring fire hole is formed in the top of the inner fire cover, the middle ring fire hole is formed in the side wall of the inner fire cover, and the inner ring fire air mixing cavity which is independently communicated with the inner ring fire channel on the furnace end is formed in the inner fire cover, so that the gas conveyed through the inner ring fire channel can be completely mixed with air in the inner ring fire channel and the inner ring fire air mixing cavity, and then is sprayed out through the dense small holes formed in the top of the inner fire cover to be combusted to form the honeycomb-shaped inner ring fire, therefore, the firepower of the combustor can be as low as 0.2 kW-0.25 kW under a small fire state, the combustion is stable, the firepower adjusting range of the gas cooker is expanded, and the stability of the combustor under a small fire state is improved.

Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is an exploded view of an embodiment of a gas cooktop proposed by the present invention;

FIG. 2 is a block diagram of the gas cooktop of FIG. 1 with the panel removed after assembly;

FIG. 3 is an exploded view of an embodiment of the burner of FIG. 1;

FIG. 4 is a block diagram of the assembled combustor shown in FIG. 3;

FIG. 5 is a front view of the burner of FIG. 4;

FIG. 6 is a rear view of the burner of FIG. 4;

FIG. 7 is a sectional view taken along A-A of the burner of FIG. 5;

FIG. 8 is a front view of one embodiment of the fire lid of FIG. 3;

FIG. 9 is a side view of one embodiment of the fire lid of FIG. 3;

FIG. 10 is a sectional view taken along line B-B of the outer fire lid of FIG. 8;

FIG. 11 is a cross-sectional view taken along line E-E of the outer fire lid of FIG. 8;

FIG. 12 is a block diagram of one embodiment of the inner fire cover of FIG. 3;

FIG. 13 is a view of the inner fire cover of FIG. 12 looking upwardly from the bottom;

figure 14 is a block diagram of the lid of figure 12 from another perspective.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

It should be noted that in the description of the present invention, terms indicating directions or positional relationships such as "upper", "lower", "top", "bottom", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 and 2, the gas cooker of the present embodiment mainly includes a cooker body, a burner, a valve assembly 6, an ignition needle 14, an adjusting knob 7, a liquid containing tray 9, a pot support 10, and other components. Wherein, the kitchen body includes drain pan 5 and panel 8, and the combustor includes furnace end 1, distributor 4, outer fire lid 2 and interior fire lid 3. The burner 1 and the valve body assembly 6 are mounted on the bottom case 5, and a burner opening 81 and a knob opening 82 are opened on the panel 8. When the faceplate 8 is snap-fitted to the bottom case 5, the lower portion of the adjustment knob 7 is mounted on the bottom case 5 through the knob opening 82 on the faceplate 8. The burner 1 is exposed through the burner opening 81 in the faceplate 8. The liquid containing tray 9 is arranged on the panel 8 to shield part of the burner opening 81 so as to prevent the liquid flowing out of the cooker from flowing into the bottom shell 5 through the burner opening 81. The ignition needle 14 and the distributor 4 are arranged on the furnace end 1, and the ignition needle 14 penetrates out of the distributor 4 through a through hole arranged on the distributor 4. The outer fire cover 2 and the inner fire cover 3 are installed on the distributor 4 and communicated with a gas passage formed in the burner 1. The pot support 10 is mounted on the liquid containing tray 9 for supporting the pot.

When using gas cooking utensils, can rotate adjust knob 7 control valve body assembly 6 and open, make the gas flow to furnace end 1, mix with the air in furnace end 1, control ignition needle 14 simultaneously and strike sparks, ignite the mixture of gas and air that erupts through outer fire lid 2 and interior fire lid 3, form flame to the food heating culinary art in the pan. In the working process of the gas cooker, the adjusting knob 7 can be rotated according to cooking requirements to adjust the opening degree of the valve body assembly 6, so that the gas flow transmitted to the burner 1 is changed, and then the adjustment of the fire power is realized.

Referring to fig. 3 to 7, the burner of the present embodiment is a four-ring burner, and three gas passages, namely, an outer ring flame passage 11, a middle ring flame passage 12, and an inner ring flame passage 13, are formed on the burner head 1. In order to facilitate the pipe distribution design during the assembly of the burner, the present embodiment preferably configures that the central line 16 of the inner annular fire channel 13 forms an included angle of 45 ° with the horizontal central line 15 of the burner 1, as shown in fig. 6; the central line 17 of the middle fire channel 12 is arranged to coincide with the horizontal central line 15 of the burner 1; the center line 18 of the outer ring fire channel 11 is arranged parallel to the horizontal center line 15 of the burner, and the outer ring fire channel 11 and the inner ring fire channel 13 are arranged on opposite sides of the horizontal center line 15 of the burner.

As a preferred embodiment of the outer ring fire channel 11, the outer ring fire channel 11 includes an outer ring fire suction section 111, an outer ring fire mixing section 112, an outer ring fire diffuser section 114, and an outer ring fire head mixing chamber 113. Wherein, the outer ring fire suction section 111 is installed on the bottom case 5, and is communicated with a gas pipeline through the valve body assembly 6, so as to be used for sucking gas. One end of the outer ring fire mixing section 112 is connected with the outer ring fire suction section 111, and the other end is connected with the outer ring fire diffusion section 114, and the length of the outer ring fire mixing section is preferably designed to be 10 mm-20 mm. The inner diameter of the outer ring fire diffuser section 114 is larger than that of the outer ring fire mixing section 112, and the gas sucked through the outer ring fire suction section 111 is mixed with air in the outer ring fire mixing section 112 and the outer ring fire diffuser section 114 and then flows toward the outer ring fire head mixing chamber 113. The outer ring fire head mixing chamber 113 is connected to the outer ring fire diffuser 114, and is preferably designed in a bottom-topped circular ring shape to provide a mixture of gas and air required for forming the outer ring fire and the inner flame fire of the four ring fire.

As a preferred embodiment of the middle ring fire channel 12, the middle ring fire channel 12 includes a middle ring fire suction section 121, a middle ring fire mixing section 122, a middle ring fire diffuser section 124, and a middle ring fire head mixing cavity 123. Wherein, well fire suction segment 121 installs on bottom shell 5, communicates the gas pipeline through valve body assembly 6 to be used for inhaling the gas. One end of the middle ring fire mixing section 122 is connected with the middle ring fire suction section 121, the other end of the middle ring fire mixing section is connected with the middle ring fire diffusion section 124, and the length of the middle ring fire mixing section is preferably designed to be 20 mm-30 mm. The inner diameter of the middle ring fire diffuser section 124 is larger than that of the middle ring fire mixing section 122, and the fuel gas sucked through the middle ring fire suction section 121 is mixed with air in the middle ring fire mixing section 122 and the middle ring fire diffuser section 124 and then flows to the middle ring fire head mixing cavity 123. The middle ring fire head mixing chamber 123 is connected with the middle ring fire diffuser 124, is preferably designed to be a cylinder with a bottom and no top, is positioned in the hollow inner ring interval of the annular outer ring fire head mixing chamber 113, and is preferably arranged concentrically with the outer ring fire head mixing chamber 113 to provide a gas and air mixture required by the middle ring fire in the four ring fire.

As a preferred embodiment of the inner ring fire channel 13, the inner ring fire channel 13 comprises an inner ring fire suction section 131, an inner ring fire mixing section 132 and an inner ring fire head mixing chamber 133. Wherein, interior ring fire suction segment 131 installs on bottom shell 5, communicates the gas pipeline through valve body assembly 6 to be used for inhaling the gas. One end of the inner ring fire mixing section 132 is connected with the inner ring fire suction section 131, and the other end is connected with the inner ring fire head mixing chamber 133. The inner diameter of the inner ring fire mixing section 132 of the embodiment is equal, preferably designed into a straight pipe, and preferably designed between phi 10mm and phi 12 mm. The length of the inner ring fire mixing section 132 is designed to be longer than the length of the middle ring fire mixing section 122 and the length of the outer ring fire mixing section 112, and can be, for example, 50 mm-80 mm. Wherein, the length of the inner annular fire mixing section 132 is designed to be between 50mm and 60mm, and the effect is optimal. The design of the inner ring fire channel of the embodiment without the diffusion section can enable the gas and the air to be mixed more completely in the mixing section 132 through the design of the lengthened mixing section, the formed inner ring fire is more stable, and the inner ring fire channel is also favorable for one-step forming during mold processing.

In the inner ring fire channel 13, an inner ring fire head mixing chamber 133 is preferably arranged inside the middle ring fire head mixing chamber 123. As a preferred embodiment, the inner ring fire head mixing chamber 133 is preferably designed as a cylinder with a bottom and no top, is located in the middle ring fire head mixing chamber 123, and is arranged concentrically with the middle ring fire head mixing chamber 123 to provide the gas and air mixture required for forming the inner ring fire of the four ring fire.

The distributor 4 is installed above the burner 1, as shown in fig. 3, the outer fire cover 2 and the inner fire cover 3 are respectively installed on the distributor 4, and the outer fire cover 2 covers and buckles above the outer ring fire head mixing cavity 113, as shown in fig. 4, the inner fire cover 3 covers and buckles above the middle ring fire head mixing cavity 123 and the inner ring fire head mixing cavity 133.

As a preferred embodiment of the outer fire cover 2, as shown in fig. 8-11, the outer fire cover 2 of this embodiment is preferably designed into a circular ring shape, and includes an outer fire cover inner ring 21 and an outer fire cover outer ring 22. Fire holes communicated with an outer ring fire head mixing cavity 113 of the burner head 1 are respectively arranged on the outer fire cover inner ring 21 and the outer fire cover outer ring 22. The mixture of gas and air in the mixing cavity 113 of the outer ring fire head is sprayed out through the fire holes arranged on the outer fire cover 2, and after being ignited, the outer ring fire and the inner flame fire are formed.

In the present embodiment, the outer fire cover outer ring 22 preferably extends vertically downward along the outer edge of the outer fire cover inner ring 21. The outer fire cover outer ring 22 is provided with a plurality of fire holes, which are defined as main fire holes 221, the plurality of main fire holes 221 are preferably divided into four groups, and the four groups of main fire holes 221 surround one circle and are preferably distributed at equal intervals in the circumferential direction, so as to ensure that the outer ring fire power of the outer fire cover is uniformly distributed.

In the embodiment, the diameter of the main fire hole 221 is preferably designed to be between Φ 2.4mm and Φ 2.6 mm. As a preferred embodiment, the diameter of the main fire hole 221 is designed to be Φ 2.5 mm. When the main fire holes 221 are formed in the outer fire cover outer ring 22, the main fire holes are preferably formed in the outer fire cover outer ring 22 in a manner of inclining inwards and downwards, so that the central axes 222 of the main fire holes 221 form an included angle α of 20-40 degrees with the horizontal plane, as shown in fig. 11. As a preferred embodiment, the included angle α formed by the central axis 222 of the main fire hole 221 and the horizontal plane is designed to be 30 °, so as to ensure that the gas-air mixture in the mixing cavity 113 of the outer ring fire head can be more smoothly ejected through the main fire hole 221, and an outer ring fire with a larger span is formed after ignition.

The outer fire cover inner ring 21 is preferably designed into a horn-shaped structure, as shown in fig. 10, that is, the outer fire cover inner ring 21 is integrally formed with an inclined surface inclined downwards from outside to inside, rather than being inclined only in one circle adjacent to the inner ring, so as to improve the energy gathering effect. As a preferred embodiment, an included angle beta formed by inclined planes of the inner ring 21 of the outer fire cover in a relative position relation is designed to be between 100 degrees and 120 degrees, namely, an opening angle of the horn-shaped structure is 100 degrees to 120 degrees, and preferably, the designed angle beta is equal to 110 degrees.

A plurality of groups of inner flame holes 211 are formed in the inner ring 21 of the outer flame cover, as shown in fig. 8, and the plurality of groups of inner flame holes 211 are arranged to be circumferentially distributed on the inner ring 21 of the outer flame cover at equal intervals. In this embodiment, the inner flame holes 211 may be provided with 14 to 18 groups, preferably 16 groups, and each group of inner flame holes 211 includes a plurality of sub-flame holes linearly arranged. The straight line where the sub-fire holes which are linearly arranged are arranged and the radial line direction of the outer fire cover 2 at the position form an included angle gamma of 50-70 degrees, and the included angle gamma is preferably designed to be equal to 60 degrees. As a preferred embodiment, each group of inner flame holes 211 may include 2 to 4 sub-flame holes, preferably 3 sub-flame holes, and the diameter of each sub-flame hole is preferably between 1.8mm and 2 mm.

The outer fire cover inner ring 21 is designed into a horn-shaped structure in the embodiment, so that high-temperature heat energy can be reflected to the bottom of a pot through the horn-shaped outer fire cover inner ring 21, and the improvement of the heat efficiency of the gas cooker is facilitated. The inner flame holes 211 are arranged on the inner ring 21 of the outer flame cover to form inner flames, so that the uniformity of the temperature of the pot bottom in a big flame state can be ensured. Meanwhile, the inner flame holes 211 are configured into a plurality of groups which are spaced from each other, so that enough space can be reserved between each group of inner flame holes 211 for supplementing secondary air, thereby enabling the gas and the air to be mixed more fully and completely and obtaining higher thermal efficiency.

As a preferred embodiment of the inner fire cover 3, as shown in fig. 12 to 14, the inner fire cover 3 of the present embodiment includes a top surface 31 and a side wall 32. The top surface 31 is preferably circular, and the side wall 32 is cylindrical and extends vertically downward along the outer edge of the top surface 31. The chamber enclosed by the top surface 31 and the side wall 32 is divided into two independent parts, as shown in fig. 13, which are an inner ring fire air mixing chamber 35 and an intermediate ring fire air mixing chamber 34, and the intermediate ring fire air mixing chamber 34 surrounds the periphery of the inner ring fire air mixing chamber 35 in a positional relationship.

An inner ring fire hole 311 is arranged on the top surface 31 of the inner fire cover 3, and the inner ring fire hole 311 is communicated with the inner ring fire mixed air cavity 35. The side wall 32 of the inner fire cover 3 is provided with a middle ring fire hole 321, and the middle ring fire hole 321 is communicated with the middle ring fire air mixing cavity 34. When the inner fire cover 3 is installed on the distributor 4, the inner fire cover 3 covers and buckles above the middle fire head mixing cavity 123 of the burner 1. Because the inner ring fire head mixing cavity 133 is positioned in the middle ring fire head mixing cavity 123, after the cover is buckled, the inner ring fire mixing cavity 35 of the inner fire cover 3 is just communicated with the inner ring fire head mixing cavity 133 of the burner 1, and the middle ring fire mixing cavity 34 of the inner fire cover 3 is just communicated with the middle ring fire head mixing cavity 123 of the burner 1.

After the assembly structure is adopted, the mixture of the gas and the air conveyed through the middle ring fire channel 12 is sprayed out through the middle ring fire hole 321 formed in the side wall 32 of the inner fire cover 3, and then middle ring fire is formed; and the mixture of the gas and the air delivered through the inner ring fire channel 13 is ejected through the inner ring fire holes 311 opened on the top surface 31 of the inner fire cover 3, and the inner ring fire is ignited and then formed.

In order to improve the combustion stability of the burner in the low-temperature state, in the embodiment, when the inner ring fire holes 311 are formed in the top surface 31 of the inner fire cover 3, the inner ring fire holes 311 should be designed to be dense small fire holes. For example, a plurality of inner ring fire holes 311 may be formed in the central region of the top surface 31 of the inner fire cover 3, and the inner ring fire holes 311 are uniformly arranged to form a circular surface, so that the mixture of the gas and the air sprayed through the inner ring fire holes 311 can be more concentrated, which is beneficial to reducing the firepower of the inner ring fire, and the inner ring fire can be stably combusted when the firepower is 0.2kW to 0.25 kW.

As a preferred embodiment, the diameter of each inner ring fire hole 311 is limited to 1.5 mm-1.6 mm, and the total area of all the inner ring fire holes 311 is limited to 60mm²~70mm²In the meantime. The distance between two adjacent inner ring fire holes 311 is minimized, for example, the distance is less than 1mm, thereby forming dense small fire holes.

The present embodiment limits the total area of the inner ring fire holes 311 to 60mm²~70mm²In the interval, the larger the area is, the smaller the flame intensity is, the short and clear flame is, the primary air coefficient is increased, the gas and the primary air are mixed more sufficiently, and the flame is combusted more completely and more stably.

As a preferred embodiment, in this embodiment, an inner ring fire step surface 312 protruding upward is preferably formed on the top surface 31 of the inner fire cover 3, and as shown in fig. 12, the inner ring fire holes 311 are formed on the inner ring fire step surface 312, so that not only the flame of the inner ring fire can be concentrated, but also the volume of the inner ring fire air mixing chamber 35 can be increased, thereby mixing the gas and the air more sufficiently, and ensuring stable combustion of the inner ring fire when the fire power is 0.2 kW.

In the embodiment, when the inner flame step surface 312 is formed on the top surface 31 of the inner flame cover 3, it is preferable that the inner flame step surface 312 includes a circular step surface located at the center of the top surface 31 of the inner flame cover 3 and a transition step surface extending from the circular step surface toward the side wall 32 of the inner flame cover 3. The fire transfer groove 36 is formed on the transition step surface, and the fire transfer groove 36 extends to the side wall 32 of the inner fire cover 3 and is communicated with at least one middle fire hole 321 formed on the side wall 32, as shown in fig. 14. The tip of the ignition needle 14 is designed to be positioned adjacent to the middle ring fire hole 321 so that a flame is formed from the middle ring fire and then transferred to the inner ring fire hole 311 via the fire transfer groove 36 to form an inner ring fire.

When the inner ring fire holes 311 are formed in the inner ring fire step surface 312, it is preferable that most of the inner ring fire holes 311 are formed in the circular step surface, and a few of the inner ring fire holes 311 (for example, 4 to 6 inner ring fire holes) are formed in the transition step surface and located on both sides of the fire transfer groove 36, so as to accelerate the ignition of the middle ring fire toward the inner ring fire.

In order to sense the fire power of the gas cooker, the burner 1 of the present embodiment is further provided with a thermocouple sensing pin 19, as shown in fig. 3. After the inner fire cover 3 is mounted on the distributor 4, the hot end of the thermocouple sensing pin 19 is located adjacent to the side wall 32 of the inner fire cover 3. The middle fire hole 321 opened on the side wall 32 contains an induction fire hole 313, as shown in fig. 14, as a preferred embodiment, the induction fire hole 313 preferably consists of 3 to 5 small holes with a diameter of 1.8 mm. The position of the induction needle fire hole 313 on the side wall 32 of the inner fire cover 3 is just right opposite to the hot end of the thermocouple induction needle 19, so that the accurate detection of the fire power is realized.

When the side wall 32 of the inner fire cover 3 is provided with the fire transfer groove 36, the fire transfer groove 36 preferably passes through the induction needle fire hole 313, so that the speed of flame transfer to the inner ring fire hole 311 can be increased, the ignition speed of the burner can be improved, and the accurate detection of the fire power of the burner can be realized by the thermocouple induction needle 19 under the condition of micro fire.

In addition, it is considered that the liquid often drips from the pot and gathers on the inner fire lid 3 during the heating process of the pot. In order to prevent the situation that excessive liquid is gathered on the top surface 31 of the inner fire cover 3, and the inner ring fire is extinguished, the embodiment forms a circle of circular ring bulges 37 on the outer edge of the top surface 31 of the inner fire cover 3, as shown in fig. 12. A notch is formed on the circular ring bulge 37 to form a diversion trench 33, so that liquid dropping to the top of the inner fire cover 3 is guided out, and the liquid is prevented from gathering on the top surface 31 of the inner fire cover 3.

As a preferred embodiment, the height of the annular projection 37 may be designed to be equal to the height of the inner ring fire step surface 312, so as to prevent the inner ring fire hole 311 from being blocked by liquid accumulated on the top of the inner fire cover 3, resulting in extinguishing of the inner ring fire.

The opening position of the diversion trench 33 on the circular ring bulge 37 should be far away from the arrangement position of the ignition needle 14 and the thermocouple sensing needle 19 so as to prevent the liquid overflowing from the top surface 31 of the inner fire cover 3 from dripping onto the ignition needle 14 and the thermocouple sensing needle 19.

In order to further protect the ignition needle 14, the present embodiment further provides an ignition needle protection cover 38 on the inner ignition cover 3, as shown in fig. 12. One end of the ignition needle protection cover 38 is connected to the annular protrusion 37, and the other end extends horizontally in a direction away from the inner fire cover 3, and the ignition needle 14 is disposed below the ignition needle protection cover 38, as shown in fig. 4, the shielding effect of the ignition needle protection cover 38 on the ignition needle 14 is utilized to further ensure that liquid dripping from a pot does not wet the ignition needle 14, so that the ignition needle 14 cannot be ignited.

As a preferred design, the ignition needle protective cover 38 and the diversion trench 33 may be disposed on opposite sides of the annular protrusion 37 to enhance the protection of the ignition needle 14.

The burner of the present embodiment can form four-ring flames, which are: the outer ring fire of the outer fire cover outer ring, the inner fireworks of the outer fire cover inner ring, the middle ring fire of the inner fire cover peripheral side, and the inner ring fire of the inner fire cover top. Therefore, the gas cooker of the present embodiment may also be referred to as a four-ring fire gas cooker.

When the fire power of the gas cooker of the present embodiment is adjusted to be maximum, the ignition needle 14 first ignites the mixture of gas and air injected through the middle ring fire hole 321 to form a middle ring fire. Then, the middle ring fire is transmitted to the inner ring fire hole 311 through the fire transmitting groove 36 on one hand to form inner ring fire; and on the other hand, to the inner flame holes 211, forming inner flames. Finally, the inner flame is transferred to the main flame hole 221 of the outer ring of the outer flame cover, forming an outer ring flame. Therefore, the whole burner is completely ignited, four-ring fire is completely opened, and the maximum firepower can reach 5 kW. During the normal combustion period of the burner, the flame of the inner flame gathers towards the center, and the high-temperature flame supports combustion of the middle ring flame and the inner ring flame. At this time, the flame temperature of the burner may be further increased, so that the thermal efficiency of the gas cooker is again improved.

When the firepower is adjusted to the middle fire, the outer ring fire and the inner flame fire are extinguished, and the cookware is heated only by the middle ring fire and the inner ring fire, wherein the firepower can reach 1.2 kW.

When the firepower is adjusted to the minimum, the outer ring fire, the inner flame fire and the middle ring fire are all extinguished, the inner ring fire is only formed on the top surface 31 of the inner fire cover 3, and the minimum firepower can reach 0.2 kW-0.25 kW.

The four rings of fire combustors of this embodiment, its firepower control range is between 0.2kW ~5kW, compares traditional three rings of fire combustors, and its firepower control range is wider. Moreover, the four-ring flame burner of the embodiment can greatly enhance the combustion stability of the burner in a low-flame state while realizing wide-range combustion, so as to better meet different cooking requirements.

In addition, the inner flame is added to the inner ring of the outer flame cover of the burner of the embodiment, so that the uniformity of the heating temperature of the pot bottom can be improved.

Of course, the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.