CN110617475A - Fire cover, burner and household gas device - Google Patents

Abstract

The invention discloses a fire cover, a burner and a household gas device. The fire lid includes lid and fire hole portion, and the lid sets up the flange in fire hole portion top including the interval, is formed with annular flame stabilizing groove between flange and the fire hole portion, is equipped with the cavity in the fire hole portion, and a plurality of profile of tooth fire holes of intercommunication cavity are seted up to the lateral wall of cavity, and a plurality of profile of tooth fire holes set up along the circumference interval of fire hole portion, and flame stabilizing groove is located the top and the intercommunication profile of tooth fire hole and cavity in a plurality of profile of tooth fire holes. In the fire cover, the flame stabilizing groove is positioned above the tooth-shaped fire hole, so that when the burner works, flame formed by the flame stabilizing groove can stabilize flame formed by the tooth-shaped fire hole, and the phenomena that gas leaves flame and takes off fire in the tooth-shaped fire hole or the probability that gas leaves flame and takes off fire in the tooth-shaped fire hole can be avoided or reduced.

Description

Fire cover, burner and household gas device

Technical Field

The invention relates to the technical field of gas appliances, in particular to a fire cover with a flame stabilizing structure, a burner and a household gas device.

Background

At present, household gas devices have become the mainstream appliances for cooking. The household gas appliance includes a burner which forms a flame by spraying gas to the outside to perform heating. Specifically, fire holes are formed in a fire cover of the combustor, fuel gas is sprayed outwards from the fire holes, and the fuel gas is ignited and then burns to form flame. However, the outflow of the gas from the fire holes takes away heat from the root of the fire holes, which easily causes the gas not to be easily ignited, thereby causing flame-out and fire-dropping. Therefore, in order to prevent the gas from leaving flame and misfiring during the combustion process, a reliable flame stabilizing structure is added to the combustor.

Disclosure of Invention

The invention provides a fire cover, a burner and a household gas device.

The fire cover comprises a cover part and a fire hole part, wherein the cover part comprises flanges arranged above the fire hole part at intervals, an annular flame stabilizing groove is formed between the flanges and the fire hole part, a cavity is arranged in the fire hole part, a plurality of tooth-shaped fire holes communicated with the cavity are formed in the side wall of the cavity, the tooth-shaped fire holes are arranged at intervals along the circumferential direction of the fire hole part, and the flame stabilizing groove is positioned above the tooth-shaped fire holes and communicated with the tooth-shaped fire holes and the cavity.

In the fire cover, the flame stabilizing groove is positioned above the tooth-shaped fire hole, so that when the burner works, flame formed by the flame stabilizing groove can stabilize flame formed by the tooth-shaped fire hole, and the phenomena that gas leaves flame and takes off fire in the tooth-shaped fire hole or the probability that gas leaves flame and takes off fire in the tooth-shaped fire hole can be avoided or reduced.

In certain embodiments, the cap portion includes the post partially within the cavity, the post connecting the flange, the post dividing the cavity into an annular cavity. So, annular cavity is favorable to the gas can follow the profile of tooth fire hole fast, avoids the gas long-time in the cavity to gather and influence combustion efficiency.

In some embodiments, the top surface of the cavity is formed with a recess surrounding the post for directing air flow from the outer side of the post toward the tooth fire holes. Thus, the gas near the outer side surface of the column part is further quickly guided to the tooth-shaped fire hole.

In some embodiments, the recess is formed with a flow directing arc for changing the direction of the airflow. Therefore, the kinetic energy loss of the gas flow can be reduced, and the gas flow is smoother.

In some embodiments, the pillar portion is formed with a stepped structure at a side surface thereof. So, conveniently with the fire lid location to the gas distribution dish of combustor on.

In certain embodiments, the post is hollow. Thus, the weight of the fire cover can be reduced and the material of the fire cover can be saved.

In some embodiments, the plurality of toothed fire holes formed by the fire hole portion are of uniform size. Therefore, the single long fire tooth structure is adopted, and the supplement of secondary air to the tooth-shaped fire holes is facilitated.

In some embodiments, the top wall of the cavity is opened with a plurality of spaced flame-stabilizing holes, and the plurality of flame-stabilizing holes are communicated with the flame-stabilizing groove and the cavity. Thus, the plurality of flame stabilizing holes can lead the gas in the cavity into the flame stabilizing groove quickly.

In some embodiments, the flame stabilizing holes are arranged in a different manner than the toothed flame holes. So, be favorable to profile of tooth fire hole and steady flame groove homoenergetic to obtain providing the gas of stable burning.

In some embodiments, the upper edge of the toothed fire hole is flush with the bottom surface of the flame holding groove. Therefore, the flame on the fire cover can basically penetrate through the whole fire hole part, so that the effect of concentrating heat generated in the combustion process is good, and secondary air of the tooth-shaped fire hole can be supplemented from the bottom surface of the fire hole part.

In some embodiments, the bottom surface of the fire hole portion is a plane inclined upward, and the tooth-shaped fire hole penetrates through the bottom surface of the fire hole portion. Therefore, on one hand, the plane which is inclined upwards can be used for being matched and positioned with the other plane which is inclined upwards on the inner ring cavity of the gas distribution disc, on the other hand, the inclined plane enables airflow in the tooth-shaped fire to form a trend that the airflow flows upwards in an inclined mode, and the trend accords with the flowing characteristic of gas.

Embodiments of the present invention provide a burner comprising a fire cover according to any of the above embodiments.

Embodiments of the present invention provide a household gas appliance comprising a burner of the above embodiments.

In the burner and the household gas device, the flame stabilizing groove is positioned above the tooth-shaped fire hole, so that when the burner works, flame formed by the flame stabilizing groove can stabilize flame formed by the tooth-shaped fire hole, and the phenomena that gas leaves flame and takes off fire in the tooth-shaped fire hole or the probability that gas leaves flame and takes off fire in the tooth-shaped fire hole can be avoided or reduced.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of a fire lid in accordance with an embodiment of the present invention;

FIG. 2 is another perspective view of a fire lid in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a fire lid in accordance with an embodiment of the present invention;

FIG. 4 is a front view of a fire lid of an embodiment of the present invention;

FIG. 5 is a schematic size diagram of a fire lid in accordance with an embodiment of the present invention;

fig. 6 is a bottom view of the fire lid of the embodiment of the present invention.

Description of the main element symbols: a fire cover 100;

the cover 12, the upper surface 122, the flange 124, the flame holding groove 14, the flame holding holes 142, the flame hole portion 16, the tooth-shaped flame holes 162, the bottom surface 1622, the recess 164, the flow guiding arc surface 1642, the pillar portion 166, the cavity 1662, the step structure 1664 and the cavity 18.

Detailed Description

Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this specification, unless explicitly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Referring to fig. 1 to 6, the present invention provides a fire cover 100, wherein the fire cover 100 includes a cover portion 12 and a fire hole portion 16, the cover portion 12 includes a flange 124 disposed above the fire hole portion 16 at an interval, an annular flame stabilizing groove 14 is formed between the flange 124 and the fire hole portion 16, a cavity 18 is disposed in the fire hole portion 16, a plurality of tooth-shaped fire holes 162 communicating with the cavity 18 are disposed on a side wall of the cavity 18, the plurality of tooth-shaped fire holes 162 are disposed at an interval along a circumferential direction of the fire hole portion 16, and the flame stabilizing groove 14 is disposed above the plurality of tooth-shaped fire holes 162 and communicates with the tooth-shaped fire holes 162 and the cavity 18.

In the fire cover 100, the flame stabilizing groove 14 is located above the tooth-shaped fire hole 162, so that when the burner is in operation, the flame formed by the flame stabilizing groove 14 can stabilize the flame formed by the tooth-shaped fire hole 162, thereby preventing the gas from leaving the flame and escaping from the fire in the tooth-shaped fire hole 162 or reducing the probability of the gas from leaving the flame and escaping from the fire in the tooth-shaped fire hole 162.

Specifically, as shown in fig. 1, the fire cover 100 provided by the present invention can be used as an inner ring fire cover 100, in the height direction a-a of the fire cover 100, the cover 12 and the fire hole portion 16 are sequentially connected from top to bottom, and the upper surface 122 of the cover 12 of the inner ring fire cover 100 presents an outwardly convex arc surface, which is beneficial for supplementing the secondary air above the cover 12 to the opening of the side flame stabilizing slot 14, so as to stabilize the combustion of the flame formed by the flame stabilizing slot 14. In addition, when the user uses the fire cover 100, the kitchen ware can be heated by the outer flame of the flame due to a certain height difference between the flame formed by the tooth-shaped fire holes 162 and the flame stabilizing grooves 14 and the kitchen ware. Therefore, the outer flame of the flame has higher temperature, so that the heating effect on the cooker is better. The fire hole portion 16 is provided with a cavity 18 for receiving a combustible mixture of gas and air.

The entire tooth-shaped fire hole 162 is long along the height direction a-a of the fire cover 100, and compared to a circular fire hole, the tooth-shaped fire hole 162 has a longer length in the height direction a-a of the fire cover 100, so that flames with larger fire power can be formed. And in the combustion process, the fire hole of profile of tooth fire hole 162 is longer, and the heat of fire hole root can be taken away to the gas outflow from the fire hole, leads to the gas to be difficult to be lighted to lead to leaving the emergence of flame and taking off a fire. Therefore, the flame stabilizing groove 14 is arranged above the tooth-shaped fire hole 162, the flame stabilizing groove 14 is communicated with the cavity 18, when gas flows through the flame stabilizing groove 14, the gas is stably combusted, and the flame formed by the flame stabilizing groove 14 can stabilize the flame formed by the tooth-shaped fire hole 162 below, so that the stable combustion is achieved, and the phenomena of flame separation and fire release are prevented.

Preferably, the plurality of tooth-shaped fire holes 162 formed in the fire hole portion 16 have a uniform size. Thus, the single long fire tooth structure is adopted, which is beneficial to the supplement of the secondary air to the tooth-shaped fire hole 162.

Specifically, in the related art, the burners having the tooth-shaped fire holes mostly adopt the staggered arrangement of the longer tooth-shaped fire holes and the shorter tooth-shaped fire holes (such as 1-2mm in length). However, the long fire teeth and the short fire teeth are matched, on one hand, the short fire teeth can consume a part of secondary air, on the other hand, the long-strip-shaped short fire teeth are easy to generate flame separation and fire release, the flame stabilizing effect is poor, and the content of carbon monoxide is higher. Adopt single long fire tooth structure collocation to be located the flame stabilizing groove of long fire tooth top, the flame stabilizing is effectual, and secondary air all supplies single long fire tooth structure basically moreover.

Referring to fig. 5, in one example, the distance L1 between two adjacent tooth-shaped fire holes 162 of the fire hole portion 16 is in the range of [6, 8] mm, preferably 7mm, although in other examples, the distance L1 between two adjacent tooth-shaped fire holes 162 can be selected from other values, and is not limited in any way. The width L2 of the tooth-shaped fire hole 162 is 1.3mm, and the height L3 along the height direction A-A of the fire lid 100 is 4.5 mm. In other examples, the width L2 of the tooth-shaped fire hole can be selected in the range of [1.2, 1.4] mm or other ranges, and the height L3 can be selected in the range of [3.5, 5.5] mm or other ranges, which are not limited herein. The plurality of tooth-shaped fire holes 162 are uniform in size, for example, the tooth-shaped fire holes 162 have the same width L2 and the same height L3. It is understood that all the tooth-shaped fire holes 162 are the same in size, or the size error of all the tooth-shaped fire holes 162 is within a desired range, for example, due to the condition limitations of machining precision, machining process, equipment, parameters, etc., the size of all the tooth-shaped fire holes 162 cannot be the same, and only the size error of the tooth-shaped fire holes 162 needs to be controlled within an acceptable range.

In the illustrated embodiment, the width L4 of the flame holding groove 14 may be 0.9mm, and in other embodiments, the width L4 of the flame holding groove 14 may also be selected in the range of [0.8, 1] mm or other ranges, and is not particularly limited herein. The flame holding groove 14 is integrally formed in a full-circle ring shape, that is, referring to fig. 6, the flame holding groove 14 is continuous 360 degrees in the circumferential direction B-B of the fire lid 100. Further, the fire cover 100 can be integrally made of aluminum or copper, and the aluminum has good hot-working performance and low cost. And the copper has high temperature resistance, so that the service life of the fire cover 100 can be ensured. Referring to fig. 6, the overall outer contour of the fire cover 100 is circular. The fire cover 100 can be manufactured by casting and hot forging, so that the simple manufacturing method can effectively reduce the manufacturing cost of the fire cover 100 and improve certain production efficiency.

In certain embodiments, the cover portion 12 includes a post 166 partially positioned within the cavity 18, the post 166 connecting the flange 124, the post 166 dividing the cavity 18 into the annular cavity 18. In this manner, the annular cavity 18 facilitates rapid flow of the combustion gases from the cavity 18 to the castellated burner orifices 162, thereby preventing long-term accumulation of combustion gases within the cavity 18 that could affect combustion efficiency.

Referring to fig. 1, 2 and 3, in particular, the pillar portion 166 may be a cylinder, and the specific shape thereof divides the cavity 18 into the annular cavity 18, and the cylinder and the annular cavity 18 can reduce the resistance of the gas flow and avoid the gas from losing additional kinetic energy. The flange 124 is generally circular in shape and has smooth edges, which may be configured to avoid cutting by sharp edges when installing or replacing the fire lid 100.

In some embodiments, the top surface of the cavity 18 is formed with a recess 164, the recess 164 surrounding the post 166, the recess 164 serving to direct airflow outside the post 166 toward the castellated fire holes 162. In this way, the gas near the outer surface of the pillar portion 166 is guided to the tooth-shaped fire hole 162 more quickly.

Specifically, referring to fig. 3, the recess 164 may be annular and surround the post 166 along an outer side of the post 166. Under the condition that the airflow enters the annular cavity 18 from the air distribution plate below the fire cover 100, the concave part 164 in the annular cavity 18 can guide the airflow on the outer side surface of the column part to extend towards the tooth-shaped fire holes 162, so that the energy consumption caused by high speed or collision friction when the airflow enters the cavity 18 can be reduced, the volume in the cavity 18 can be increased, enough airflow can enter, and meanwhile, the airflow can be favorably and quickly flowed from the cavity 18 to the tooth-shaped fire holes 162, so that the airflow can be uniformly distributed at all positions of the annular cavity 18.

In some embodiments, the recess 164 is formed with a flow directing camber 1642 for gas direction.

Specifically, during ventilation, a large amount of gas flows enter the annular cavity 18, the flow guide arc surface 1642 at the concave 164 can play a certain gas flow guide role, a part of gas flows are guided to the tooth-shaped fire holes 162, and the arc surface can reduce kinetic energy loss of the gas flows, so that the gas flows more smoothly, the gas is better supplied to the tooth-shaped fire holes 162, and unnecessary energy loss can be reduced.

In some embodiments, the outer side of the post 166 is formed with a step structure 1664. In this manner, it is convenient to position the fire cover 100 onto the gas distributor plate of the burner.

Specifically, the fire cover 100 can be regarded as the interior fire cover of combustor, and the gas distribution plate includes the inner ring cavity, and inner ring cavity middle part is equipped with the chimb that cooperates with stair structure 1664, and like this, when the fire cover 100 is installed to the gas distribution plate, the stair structure 1664 of post portion 166 can cooperate with the chimb of inner ring cavity to be connected, has made things convenient for the location installation of fire cover 100.

In certain embodiments, the post 166 is hollow. In this way, the weight of the fire lid 100 can be reduced and the material of the fire lid 100 can be saved.

Specifically, the hollow post 166 defines a cavity 1662 therein, and the cavity 1662 may be cylindrical to significantly reduce the weight of the fire lid 100 and to conserve material in the fire lid 100. It should be noted that the size of the housing 1662 is determined by the structural strength of the fire cover 100, and is not an increase.

In some embodiments, the top wall of the cavity 18 defines a plurality of spaced flame stabilizing holes 142, and the plurality of flame stabilizing holes 142 communicate between the flame stabilizing slot 14 and the cavity 18. In this way, the plurality of flame stabilizing holes 142 can guide the gas in the cavity 18 into the flame stabilizing groove 14 relatively quickly.

Specifically, referring to fig. 2, 3 and 6, the diameter of the flame stabilizing hole 142 is 1.5mm, and in other embodiments, the diameter of the flame stabilizing hole 142 may also be selected in the range of [1.4, 1.6] mm or other ranges, which is not limited herein. The flame holding holes 142 extend substantially vertically through the junction between the cover portion 12 and the flame hole portion 16, the flame holding groove 14 is disposed substantially horizontally on the upper side of the tooth-shaped flame holes 162, and the flame holding holes 142 are disposed substantially vertically on the lower side of the flame holding groove 14. During ventilation, the gas flow in the cavity 18 flows upwards through the flame stabilizing holes 142, then flows through the flame stabilizing grooves 14 and is stably combusted at the outlet of the flame stabilizing grooves 14, and because the speed of the gas flow entering the cavity 18 is high, the flow rate of the combustion gas flow is reduced to a certain extent after the combustion gas flow passes through the flame stabilizing holes 142 and then enters the flame stabilizing grooves 14, so that the flame stabilizing effect of the flame stabilizing holes 142 and the flame stabilizing grooves 14 can be further ensured, and a better flame stabilizing effect is achieved.

When the gas is combusted at the tooth-shaped fire hole 162, the flame is formed outwards approximately, and the secondary air at the periphery of the fire cover 100 can flow to the tooth-shaped fire hole 162 from the outer side surface of the fire cover 100 to supplement enough secondary air for the combustion at the tooth-shaped fire hole 162, so that the combustion is more sufficient. Moreover, a certain coverage of the flame at the tooth-shaped fire holes 162 can be enlarged, so that the flame of the fire cover 100 has a larger heating area.

It can be understood that when the flame at one or more of the plurality of tooth-shaped fire holes 162 is not stable, the flame of the flame stabilizing slot 14 can also play a role in timely reignition.

Referring to fig. 6, in some embodiments, the flame stabilizing holes 142 are arranged in a different manner than the toothed flame holes 162. In this way, the tooth-shaped fire holes 162 and the flame stabilizing grooves 14 can be facilitated to obtain the fuel gas for providing stable combustion.

Specifically, the arrangement of the flame stabilizing holes 142 is different from the arrangement of the tooth-shaped flame holes 162, and it is understood that the flame stabilizing holes 142 and the tooth-shaped flame holes 162 do not all have a one-to-one correspondence relationship, but a certain tooth-shaped flame hole 162 may correspond to the position of the flame stabilizing hole 142, a certain tooth-shaped flame hole 162 does not correspond to the position of the flame stabilizing hole 142, all the tooth-shaped flame holes 162 may not correspond to all the positions of the flame stabilizing holes 142, the position of some or a certain tooth-shaped flame hole 162 corresponds to the position between two adjacent flame stabilizing holes 142, and the position of some or a certain flame stabilizing hole 142 corresponds to the position between two adjacent tooth-shaped flame holes 162. This has the advantage of reducing the amount of gas that is present in the same location in the cavity 18 to be supplied to both the primary feed castellated flame holes 162 and the primary feed flame stabilizing holes 142, which can cause the flame formed by both to be unstable.

The plurality of tooth-shaped fire holes 162 formed in the fire hole part 16 are uniformly distributed along the circumferential direction B-B of the fire cover 100, and the plurality of flame stabilizing holes 142 are uniformly distributed along the same direction B-B of the fire cover 100. The uniform distribution means that the angles between the two adjacent holes are the same with respect to the center of the fire cover 100.

In some embodiments, referring to fig. 3 and 4, the upper edge of the serrated fire hole 162 is flush with the bottom surface of the flame holding groove 14. In this way, the flame on the fire cover 100 can penetrate through substantially the whole fire hole part 16, so that the heat generated during the combustion process can be concentrated effectively, and the secondary air of the tooth-shaped fire holes 162 can be supplemented from the bottom surface 1622 of the fire hole part 16.

In some embodiments, the bottom surface 1622 of the fire hole portion 16 is an inclined upward plane having an angle a with respect to a horizontal plane in the range of [25 °, 50 ° ], and in the illustrated embodiment, the angle a is 35 °, although in other examples the angle a may be any value between 25 °, 30 °, 45 °, 50 °, or 25 ° and 50 °. The toothed fire hole 162 extends through a bottom surface 1622 of the fire hole portion 16. Therefore, on one hand, the plane which is inclined upwards can be used for being matched and positioned with another plane which is inclined upwards on the inner ring cavity of the gas distribution plate, and on the other hand, the inclined plane enables airflow in the tooth-shaped fire hole 162 to form a trend that the airflow flows obliquely upwards, so that the gas flow characteristic is met.

Specifically, the bottom 1622 of the fire hole portion 16 is circular, so that it can be integrally engaged with the other inclined surface of the inner cavity.

A burner according to an embodiment of the present invention includes the fire cover 100 according to any of the above embodiments.

In the burner according to the embodiment of the present invention, the flame holding groove 14 is located above the tooth-shaped fire hole 162, so that when the burner is in operation, the flame formed by the flame holding groove 14 holds the flame formed by the tooth-shaped fire hole 162, thereby preventing the gas from leaving the flame and escaping from the fire at the tooth-shaped fire hole 162 or reducing the probability of the gas leaving the flame and escaping from the fire at the tooth-shaped fire hole 162.

When the fire cover 100 is used, the fire cover 100 can be arranged on an inner ring cavity of a gas distribution plate of a combustor as an inner fire cover 100 and is matched with the gas distribution plate for use. The combustible gas mixture of gas and air in the cavity 18 can be provided by a gas distribution plate. The burner can be applied to household gas devices such as gas cookers, ovens, gas water heaters and the like.

The embodiment of the invention provides a household gas device which comprises a burner.

In the household gas device according to the embodiment of the present invention, the flame holding groove 14 is located above the tooth-shaped fire hole 162, so that when the burner is in operation, the flame formed by the flame holding groove 14 holds the flame formed by the tooth-shaped fire hole 162, thereby preventing the gas from leaving the flame and escaping from the tooth-shaped fire hole 162 or reducing the probability of the gas leaving the flame and escaping from the tooth-shaped fire hole 162.

Specifically, in one example, the household gas appliance is a gas cooker, the gas cooker further comprises a shell, a panel and a control structure, the panel is covered on the shell and provided with a mounting hole, the burner is partially positioned in the shell and exposed out of the mounting hole, and the control structure is arranged on the panel and used for a user to control the gas cooker. In a specific embodiment, the control structure may be a knob structure, so that the control structure can be used for respectively controlling the gas delivery to the inside of the burner, and the flow rate of the gas is adjusted through the control structure so as to control the fire power of the burner. Therefore, the gas cooker can be suitable for various working environments, such as steaming, boiling, baking and frying in cooking.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. The utility model provides a fire lid, its characterized in that includes lid and fire hole portion, the lid sets up including the interval the flange of fire hole portion top, the flange with be formed with annular flame stabilizing groove between the fire hole portion, be equipped with the cavity in the fire hole portion, the intercommunication has been seted up to the lateral wall of cavity a plurality of profile of tooth fire holes of cavity, a plurality of profile of tooth fire holes are followed the circumference interval of fire hole portion sets up, flame stabilizing groove is located the top and the intercommunication in a plurality of profile of tooth fire holes the profile of tooth fire hole with the cavity.

2. The fire lid of claim 1 wherein said lid portion includes a post partially located within said cavity, said post connecting said flange, said post dividing said cavity into an annular cavity.

3. The fire cover of claim 2 wherein the top surface of the cavity is formed with a depression surrounding the post for directing air flow from the outer side of the post toward the fire hole.

4. The fire cover of claim 3, wherein the recess is formed with a flow guide arc surface for changing a direction of the air flow.

5. The fire cover according to claim 2, wherein the pillar portion is formed with a stepped structure at an outer side surface thereof.

6. The fire cover of claim 2 wherein said post portion is hollow.

7. The fire cover of claim 1 wherein said plurality of castellated fire holes formed in said fire hole portion are of uniform size.

8. The fire cover according to claim 1, wherein a plurality of spaced flame stabilizing holes are formed in the top wall of the cavity, and the flame stabilizing holes communicate the flame stabilizing groove and the cavity.

9. The fire cover of claim 8, wherein the plurality of flame stabilizing holes are arranged in a different manner than the plurality of toothed flame holes.

10. The fire cover of claim 1, wherein the upper edge of the serrated fire hole is flush with the bottom surface of the flame holding groove.

11. The fire cover of claim 1, wherein the bottom surface of the fire hole portion is a plane inclined upward, and the tooth-shaped fire holes penetrate the bottom surface of the fire hole portion.

12. A burner comprising the fire cover of any one of claims 1-11.

13. A gas-fired domestic appliance comprising a burner as claimed in claim 12.