CN211822378U

CN211822378U - Inner ring fire cover and cooker burner with same

Info

Publication number: CN211822378U
Application number: CN201922263220.4U
Authority: CN
Inventors: 杨杰; 郑军妹
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-10-30
Anticipated expiration: 2029-12-16

Abstract

An inner ring fire cover comprises a fire cover body (1) and a cover body (2) covering the fire cover body (1), wherein an ignition hole (11) is formed in the peripheral wall of the side of the fire cover body (1), and a part which extends outwards along the radial direction is arranged on the periphery of the cover body (2) above the ignition hole (11) to form a water blocking brim (23); the method is characterized in that: the bottom surface of the water retaining eave (23) is a dome structure (231) with a high middle part and a low periphery so as to block overflow liquid from flowing to the middle of the bottom surface of the water retaining eave (23). The application also discloses a cooker burner with the inner ring fire cover. Compared with the prior art, this application carries out the water conservancy diversion through the overflow to manger plate eaves bottom surface to the convection current, can prevent that the overflow from flowing to manger plate eaves in the middle of the bottom surface, and then improves the success rate of igniteing.

Description

Inner ring fire cover and cooker burner with same

Technical Field

The utility model belongs to the technical field of cooking utensils combustor, concretely relates to inner ring fire lid and applied cooking utensils combustor that has this inner ring fire lid.

Background

The existing stove burner generally has an inner ring fire cover which is matched with elements such as an ignition needle and the like to realize the functions of generating flame, maintaining flame and the like. The inner ring fire cover generally comprises a fire cover body with an upper opening and a cover body covering the opening of the fire cover body, wherein the fire cover body is provided with an ignition hole matched with an ignition needle. During cooking, the ignition needle is subjected to high-voltage discharge to generate sparks so as to ignite the gas coming out of the ignition hole, and further realize combustion. However, in the cooking process, the overflow liquid overflowing from the pot can drip onto the cover body and the ignition needle, and the overflow liquid dripping onto the cover body can flow downwards to the fire cover body along the cover body to block the ignition hole on the fire cover body, so that the burner can not ignite.

Therefore, the utility model patent of ZL201820644650.3 discloses a combustor for cooking utensils (the grant bulletin number is CN208804671U), and it includes base and fire lid, is equipped with the ignition needle in the position of neighbouring fire lid periphery wall, and at least one ignition hole has been seted up to the position that the fire lid periphery wall corresponds the ignition needle, and the fire lid periphery wall is local to be formed with the boss that shelters from in the ignition needle top along the outside extension of fire lid radial direction, and this boss is equivalent to the manger plate eaves that shelters from the overflow, and its bottom surface is protruding to be equipped with an ignition post to with the cooperation of ignition needle, guarantee the position of electric spark. The patent can better protect the ignition hole and the ignition needle, and improve the ignition success rate. However, when a large amount of liquid overflows, a part of the liquid overflows may flow to the bottom surface of the boss along the outer peripheral wall of the boss and hang on the ignition column on the bottom surface of the boss to affect the ignition distance or flow along the bottom surface of the boss and drip to the ignition hole or the ignition needle below, thereby affecting the ignition success rate.

Also, for example, an inner ring fire cover disclosed in patent application CN201711489129.3, namely "an inner ring fire cover for an anti-blocking burner" (application publication No. CN109990291A) includes a cylindrical fire cover body and an end cap disposed at the top end of the fire cover body, wherein a protective umbrella is disposed on one side of the end cap, and the outer peripheral side of the bottom surface of the protective umbrella is recessed upward to form an annular flow guide groove. Therefore, when the overflowing liquid drops to the bottom surface of the protective umbrella along the wall, the overflowing liquid can be guided to the guide groove, and the phenomenon that the overflowing liquid drops to the ignition needle from the middle part of the bottom surface of the protective umbrella to influence ignition is avoided. However, when a large amount of liquid spills occur, the liquid spills may flow along the bottom surface of the protective umbrella and the side wall of the fire cover body to the ignition hole and the ignition needle.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the first technical problem that will solve is to prior art's current situation, provides one kind and carries out the water conservancy diversion through the overflow of convection current to manger plate eaves bottom surface to improve the inner ring fire lid of the success rate of igniteing.

The second technical problem to be solved by the utility model is to provide an inner ring fire cover that can collect the overflow and make the overflow flow down along inner ring fire cover one side is concentrated.

The third technical problem to be solved by the utility model is to provide a cooking utensils combustor that uses and has above-mentioned inner ring fire lid.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does: an inner ring fire cover comprises a fire cover body and a cover body covering the fire cover body, wherein ignition holes are formed in the peripheral wall of the fire cover body, and the periphery of the cover body above the ignition holes is provided with a part which extends outwards along the radial direction to form a water retaining brim; the method is characterized in that: the bottom surface of the water retaining eave is of a dome structure with a high middle part and a low periphery so as to block overflow liquid from flowing to the middle of the bottom surface of the water retaining eave.

The dome structure can be formed by that the bottom surface of the water retaining eave is inclined downwards from the middle to the periphery, or the bottom surface of the water retaining eave is inclined downwards from the inside to the outside along the radial direction to form an inclined surface, or other structures with high middle and low periphery are adopted.

In order to fix the discharge position of the ignition needle and further improve the ignition success rate, an ignition column is arranged on the bottom surface of the water retaining brim and is located at the highest position in the middle of the bottom surface of the water retaining brim. Thereby avoiding the overflow liquid flowing to the ignition column to influence the ignition distance. Of course, the discharge end can be formed in the middle of the bottom surface of the water retaining eave through other structures without additionally arranging the ignition column.

In order to further prevent the overflow from flowing to the middle of the bottom surface of the water blocking eave, it is preferable that a blocking piece for further blocking the overflow to prevent the overflow from flowing to the middle of the bottom surface of the water blocking eave is arranged on the periphery of the bottom surface of the water blocking eave.

Preferably, the blocking piece is an arc-shaped groove formed in the bottom surface of the water retaining eave and extending along the peripheral contour of the water retaining eave. The overflow liquid which flows to the bottom surface of the water retaining eaves in a centralized way is shunted, so that the overflow liquid flows and drips along the arc-shaped groove. Of course, the blocking piece can also be an arc-shaped blocking strip arranged along the peripheral contour of the water retaining eave to block the overflowing liquid and prevent the overflowing liquid from transversely flowing to the middle of the bottom surface of the water retaining eave. The blocking piece can also adopt other structures as long as the overflow can be blocked, and the overflow can be prevented from flowing to the middle of the bottom surface of the water retaining eave.

The arc-shaped grooves can be arranged at one or more than one, preferably, the number of the arc-shaped grooves is at least two, and the arc-shaped grooves are distributed at intervals inside and outside.

In order to further prevent the overflowing liquid from flowing to the ignition hole, a step for blocking the overflowing liquid is arranged at the joint of the bottom surface of the water retaining brim and the cover body, and the step extends along the circumferential direction of the cover body.

In order to better block the overflowing liquid, the step extends along the circumferential direction of the cover body for a distance which is larger than the span of the water blocking eaves in the circumferential direction of the cover body. Furthermore, the overflow liquid flowing down from the periphery of the cover body can transversely flow along the step under the action of the step and flow down from the end part of the step, the overflow liquid can be prevented from flowing to the ignition hole below the step,

in the scheme, the peripheral wall of the water retaining eave is of a vertically downward or obliquely downward structure so as to guide overflow liquid to flow down along the peripheral wall. When the peripheral wall of the water retaining eave is vertically downward, the overflowing liquid can smoothly and directly fall down; when the ignition needle is inclined downwards, due to the inertia effect, the overflowing liquid can fly outwards and can not drip onto the fire hole or the ignition needle along the wall.

The fire cover body is provided with a fire hole, in order to prevent overflowing liquid from flowing onto the fire cover body from the cover body and transversely flowing along the fire cover body to block the fire hole and the ignition hole, the periphery of the cover body protrudes out of the fire cover body along the horizontal direction to form a waterproof brim.

Furthermore, the peripheral wall of the waterproof eaves is provided with a part which extends downwards and is inclined inwards so as to guide overflowing liquid to flow downwards along the part. The position of while leaned in and downwardly extending can also guarantee to cover the play fire angle that goes out the fire hole on the body for flame can not burn to cover the edge, guarantees combustion efficiency.

To further solve the second technical problem, preferably, the top wall of the cover body is a closed structure; the top of the cover body is sunken downwards to form a liquid containing groove for collecting overflowing liquid, an opening communicated with the liquid containing groove and used for overflowing liquid to flow out is formed in at least one peripheral side of the cover body, the opening is arranged to avoid the water retaining brim, and a flow guide groove used for overflowing liquid to flow down along the opening is formed in the side wall of the fire cover body corresponding to the opening. Furthermore, the liquid containing groove can collect the overflowing liquid dropping on the cover body and is matched with the flow guide groove, so that the overflowing liquid flows out along the flow guide groove in a centralized way, and the overflowing liquid is prevented from flowing down from other places to block the fire outlet and the ignition hole.

In order to collect the overflow liquid on the water blocking eaves and avoid the overflow liquid from accumulating on the water blocking eaves, preferably, the liquid containing grooves are distributed on the top surfaces of the water blocking eaves at the same time. Therefore, the overflow liquid dripped onto the water retaining eaves can be guided out from the flow guide groove while the liquid containing area of the liquid containing groove can be increased, and the ignition hole is further prevented from being blocked by the overflow liquid.

In order to enable the overflowing liquid to smoothly flow down along the diversion trench, the opening extends into the liquid containing groove, and the diversion trench is connected with the liquid containing groove through a chamfer.

In order to enlarge the liquid containing area and enable the overflowing liquid to smoothly flow down along the flow guide groove, preferably, the projection of the groove bottom of the liquid containing groove on the horizontal plane covers the projection of the fire cover body on the horizontal plane; the caliber of the notch of the liquid containing groove is gradually reduced from top to bottom.

The utility model provides a technical scheme that above-mentioned third technical problem adopted does: a stove burner applying the inner ring fire cover is disclosed.

Compared with the prior art, the utility model has the advantages of: through setting up the bottom surface of manger plate eaves to middle height, the dome structure that the periphery is low, when the bottom surface of manger plate eaves was got into to the overflow, the overflow can only gather and drip at the bottom surface periphery of manger plate eaves under the effect of self gravity, and can't upwards flow to the bottom surface of manger plate eaves in the middle of, and then can effectively prevent that the overflow from dripping from the bottom surface of manger plate eaves in the middle of and influencing the use of ignition needle, and then improve the success rate of igniteing.

Through set up the flourishing cistern at the top of lid, set up the guiding gutter on the lateral wall of fire lid body, the flourishing cistern can be with the overflow gathering that drips on the lid to with the guiding gutter cooperation, make the overflow concentrate flow out along the guiding gutter is concentrated, and then can reduce the overflow volume that flows down from the manger plate eaves, further improve the success rate of igniting

Use and have the utility model discloses a stable ignition can be realized to cooking utensils combustor of inner ring fire lid, and then improves the success rate of igniteing.

Drawings

Fig. 1 is a schematic structural view of a cooking appliance burner according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a schematic structural view of an inner ring fire cover according to a first embodiment of the present invention;

fig. 5 is a schematic structural view of an inner ring fire cover in another view angle according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a further viewing angle of the inner ring fire cover in the first embodiment of the present invention;

fig. 7 is a cross-sectional view of an inner ring fire cover according to an embodiment of the present invention;

FIG. 8 is another cross-sectional view of an inner ring fire cover according to an embodiment of the present invention;

fig. 9 is a schematic structural view of an inner ring fire cover in the second embodiment of the present invention;

fig. 10 is a schematic structural view of an inner ring fire cover in a second embodiment of the present invention from another viewing angle;

fig. 11 is a schematic structural view of another view angle of the inner ring fire cover in the second embodiment of the present invention;

fig. 12 is a cross-sectional view of an inner ring fire cover according to a second embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The first embodiment is as follows:

as shown in fig. 1-8, for the utility model discloses an inner ring fire lid and applied preferred embodiment one of the cooking utensils combustor that has this inner ring fire lid, this inner ring fire lid is including fire lid body 1 and the lid 2 that covers on fire lid body 1.

The top wall of the cover body 2 is closed, the periphery of the cover body 2 protrudes out of the fire cover body along the horizontal direction to form a waterproof brim 20, and the peripheral wall of the waterproof brim is provided with a part which extends downwards and is inclined inwards so as to guide overflowing liquid to flow downwards along the part.

The top of the cover body 2 is sunken downwards to form a liquid containing groove 21 for collecting overflowing liquid, the caliber of the notch of the liquid containing groove 21 is gradually reduced from top to bottom, and the projection of the groove bottom of the liquid containing groove 21 on the horizontal plane covers the projection of the fire cover body 1 on the horizontal plane; an opening 22 communicated with the liquid containing groove 21 and used for overflowing liquid to flow out is formed in one side of the periphery of the cover body 2, and the opening 22 extends into the liquid containing groove 21; the side wall of the fire cover body 1 is provided with a diversion trench 10 corresponding to the opening 22 for the overflow to flow down along, and the diversion trench 10 is connected with the liquid containing groove 21 through a chamfer angle.

Meanwhile, the side peripheral wall of the fire cover body 1 is provided with an ignition hole 11, and the periphery of the cover body 2 above the ignition hole 11 is provided with a part which extends outwards along the radial direction to form a water retaining brim 23. The water blocking eaves 23 are arranged on the waterproof eaves 20, and the peripheral wall of the water blocking eaves 23 is of a vertical downward structure so as to guide overflowing liquid to flow down along the structure. Because the peripheral wall of the water-retaining eave 23 is vertically downward, the peripheral wall of the waterproof eave 20 is inclined inward, and the joint of the two is an included angle region which is easy to cause the overflow to flow down intensively, in this embodiment, the joint of the water-retaining eave 23 and the waterproof eave 20 is provided with a filling part 24 of which the outer surface is inclined outward and extends downward. Meanwhile, the liquid tanks 21 are simultaneously distributed on the top surface of the water-blocking eaves 23. The bottom surface of the water-blocking eave 23 is a dome structure with a high middle part and a low periphery to block the overflow liquid from flowing to the middle of the bottom surface of the water-blocking eave 23, and in this embodiment, the dome structure is a structure in which the bottom surface of the water-blocking eave 23 is inclined downwards from inside to outside along the radial direction to form an inclined surface 236, and then the middle part is higher than the periphery. Two arc walls 235 have been seted up on the bottom surface periphery of manger plate eaves 23, each arc wall 235 extends along the peripheral profile of manger plate eaves 23, and the inside and outside interval distribution of two arc walls 235, when the overflow flows to the bottom surface of manger plate eaves 23 along the perisporium of manger plate eaves 23, at first can receive blocking of arc wall 235, arc wall 235 can dredge and shunt the overflow, make the overflow flow and form the liquid drop and drip along arc wall 235, and then further avoid the overflow lateral flow to manger plate eaves 23 in the middle of the bottom surface. In order to prevent the overflow from directly flowing out of the inclined plane 236 to the ignition hole due to too high flow rate, a step 201 for blocking the overflow is disposed on a portion of the bottom surface of the waterproof eaves 20 corresponding to the water-blocking eaves 23, and the step 201 extends along the circumferential direction of the waterproof eaves 20 and is located inside the inclined plane 236 to block and buffer the overflow. Meanwhile, the step 201 extends along the circumferential direction of the waterproof eaves 20 by a distance greater than the span of the water-blocking eaves 23 in the circumferential direction of the waterproof eaves 20.

In order to ensure the stability of the ignition position, an ignition column can be arranged in the middle of the bottom surface of the water retaining brim 23, so that the ignition needle can discharge to the ignition column. In this embodiment, no ignition column is additionally provided, but the inclined surface 236 intersects with the plane, and a protruding rib 237 is formed at the boundary, and the protruding rib 237 functions as a discharge end.

In this embodiment, the longitudinal section of the fire cover body 1 is substantially in an inverted "convex" shape, and includes a first body 1a located at the upper portion and a second body 1b located at the lower portion and having an outer diameter smaller than that of the first body 1a, a side peripheral wall of the first body 1a protrudes outward from a side peripheral wall of the second body 1b in the radial direction, a first flame attenuating hole 12 and a first fire emitting hole 13 are circumferentially provided on the side peripheral wall of the first body 1a, wherein the first flame stabilizing hole 12 is provided at the bottom of an inclined downward extending portion on the peripheral wall of the waterproof eaves 20, and is provided above the first fire emitting hole 13 at an interval with the first fire emitting hole 13. The diversion trench 10 is disposed on the first body 1a, a small number of first fire outlets 13 (one in this embodiment) are located on the diversion trench 10, and the first fire outlets 13 on the diversion trench 10 are inclined downward from inside to outside, in this embodiment, the first fire outlets 13 on the diversion trench 10 are higher than the other first fire outlets 13. Please refer to fig. 4 and 7.

The second fire outlet 14 is arranged on the side peripheral wall of the second body 1b along the circumferential direction, the second fire outlet 14 is arranged below the first fire outlet 13 and is arranged at an interval with the first fire outlet 13, and meanwhile, the aperture of the first fire outlet 13 is larger than that of the second fire outlet 14. Meanwhile, the side peripheral wall of the second body 1b is provided with the protrusions 15 at intervals along the circumferential direction, and the second fire outlet holes 14 are correspondingly arranged on each protrusion 15 and between two adjacent protrusions 15. The side peripheral wall of the first body 1a protrudes in the radial direction beyond the outer side wall of each projection 15. In this embodiment, the second fire holes 14 are inclined upward from inside to outside, and second notches 16 for the second fire holes 14 to come out along are formed in the bottom surface of the first body 1a corresponding to the second fire holes 14. Similarly, the second recess 16 can prevent the overflow from flowing laterally along the bottom surface of the second body 1b to block one of the second fire holes 14.

Meanwhile, a third flame stabilizing hole 17 is further formed in the side peripheral wall of the second body 1b along the circumferential direction, and the third flame stabilizing hole 17 is located above the second flame outlet 14 and is spaced from the second flame outlet 14. In this embodiment, the third flame stabilizing hole 17 is disposed corresponding to each first flame outlet 13 outside the guiding groove 10 and is communicated with the corresponding first flame outlet 13. And the side peripheral wall of the second body 1b is provided with flame stabilizing grooves 18 connecting the third flame stabilizing holes 17 along the circumferential direction. In order to prevent the overflow liquid from flowing transversely in the flame stabilizing groove 18 and blocking a third flame stabilizing hole 17, the convex part 15 is arranged below the flame stabilizing groove 18, and the upper end surface 151 of the convex part 15, which is connected with the flame stabilizing groove 18, inclines downwards so as to guide the overflow liquid to flow downwards along the upper end surface.

Meanwhile, as shown in fig. 8, a fire protection hole 19 adapted to the thermocouple is formed in the fire cover body 1, and the fire protection hole 19 is inclined downward from inside to outside.

As shown in fig. 1-3, for the cooking utensils combustor that has above-mentioned inner ring fire lid, when the inner ring fire lid was installed on furnace end 3, the highest face of furnace end 3 and inner ring fire lid cooperation position can not exceed the minimum of second fire outlet 14 in the inner ring fire lid to it is smooth and easy to make the inner ring fire lid give vent to anger, and foremost, can not form the ring channel with between the inner ring fire lid, otherwise in case the overflow takes place, then can lead to whole circle of fire hole to be stopped up. The ignition needle 5 is arranged below the middle of the bottom surface of the water retaining brim 23.

Example two:

as shown in fig. 9-12, for the utility model discloses an inner ring fire lid and applied preferred embodiment two of the cooking utensils combustor that has this inner ring fire lid, this inner ring fire lid is including fire lid body 1 and the lid 2 that covers on fire lid body 1.

Wherein, the top wall of the cover body 2 is closed, the periphery of the cover body 2 protrudes out of the fire cover body along the horizontal direction to form a waterproof brim 20, and the peripheral wall of the waterproof brim is provided with a part which extends downwards and inclines inwards so as to guide overflowing liquid to flow downwards along the part. A plurality of first recesses 200 are concavely arranged on the bottom surface of the inclined downward extending part on the peripheral wall of the waterproof eaves 20, and the first recesses 200 are circumferentially distributed at intervals.

Meanwhile, the side peripheral wall of the fire cover body 1 is provided with an ignition hole 11, and the periphery of the cover body 2 above the ignition hole 11 is provided with a water retaining brim 23 extending outwards. The peripheral wall of the water retaining brim 23 extends obliquely downward to form an inclined part along which the overflow flows downward, and the inclined part inclines outward. Because the peripheral wall of the water-blocking eave 23 is inclined outwards, the peripheral wall of the water-blocking eave 20 is inclined inwards, and the joint of the two is an included angle area which is easy to cause the overflow to flow down intensively, in this embodiment, the joint of the water-blocking eave 23 and the cover body 3 is provided with a filling part 24 of which the outer surface is inclined outwards and extends downwards. Meanwhile, the top of the water-blocking eaves 23 is recessed downwards to form a groove 230 communicated with the liquid tank 21. The bottom surface of the water blocking eave 23 protrudes upwards to form a dome structure 231 with a high middle part and a low periphery, and the dome structure 231 is formed by downward inclining the bottom surface of the water blocking eave 23 from the middle part to the periphery, so that the bottom surface of the water blocking eave 23 is of a structure with the high middle part and the low periphery, and overflow is further prevented from flowing to the middle part of the bottom surface of the water blocking eave 23. The middle highest position of the dome structure 231 is provided with an ignition column 232. There are no other tips around the ignition column 232, so that the closest point and the tip point can be found during the electric spark discharge, thereby being beneficial to ensuring the position of the electric spark and improving the ignition success rate. Meanwhile, as the ignition column 232 is arranged in the middle of the dome structure 231, when the overflowing liquid enters the bottom surface of the water retaining eave 23, the overflowing liquid can only transversely flow or downwards flow under the action of self gravity and cannot upwards flow to the middle of the bottom surface of the water retaining eave 23, and then the ignition success rate can be effectively prevented from being influenced by hanging water drops on the ignition column 232 (as the overflowing liquid has conductivity, the ignition distance can be influenced by hanging the water drops on the ignition column 232, and further the ignition success rate is influenced). And because the ignition needle is arranged below the ignition column 232, the phenomenon that the overflowing liquid drips onto the ignition needle to influence the use of the ignition needle can be effectively avoided.

In this embodiment, the longitudinal section of the fire cover body 1 is substantially in an inverted "convex" shape, and includes a first body 1a located at the upper portion and a second body 1b located at the lower portion and having an outer diameter smaller than that of the first body 1a, a side peripheral wall of the first body 1a protrudes outward from a side peripheral wall of the second body 1b in the radial direction, a first flame attenuating hole 12 and a first fire emitting hole 13 are circumferentially provided on the side peripheral wall of the first body 1a, wherein the first flame stabilizing hole 12 is provided at the bottom of an inclined downward extending portion on the peripheral wall of the waterproof eaves 20, and is provided above the first fire emitting hole 13 at an interval with the first fire emitting hole 13. The first notch 200 is provided corresponding to the first attenuated hole 12, and the first notch 200 is formed along with the first attenuated hole 12 when the first attenuated hole 12 is attenuated. The diversion trench 10 is disposed on the first body 1a, a small number of first fire outlets 13 (one in this embodiment) are located on the diversion trench 10, and the first fire outlets 13 on the diversion trench 10 are inclined downward from inside to outside, in this embodiment, the first fire outlets 13 on the diversion trench 10 are higher than the other first fire outlets 13. Please refer to fig. 9 and 12.

Meanwhile, in the first embodiment, the fire cover body 1 is provided with the fire protection hole 19 adapted to the thermocouple, and the fire protection hole 19 is inclined downwards from inside to outside.

The cooker burner with the inner ring fire cover can be referred to as embodiment one, when the inner ring fire cover is installed on the burner head 3, the highest surface of the matching position of the burner head 3 and the inner ring fire cover cannot be higher than the lowest point of the second fire outlet hole 14 in the inner ring fire cover, so that the inner ring fire cover can give out air smoothly, and most importantly, an annular groove cannot be formed between the inner ring fire cover and the inner ring fire cover, otherwise, once liquid overflowing occurs, the whole ring of fire holes can be blocked.

Claims

1. An inner ring fire cover comprises a fire cover body (1) and a cover body (2) covering the fire cover body (1), wherein an ignition hole (11) is formed in the peripheral wall of the side of the fire cover body (1), and a part which extends outwards along the radial direction is arranged on the periphery of the cover body (2) above the ignition hole (11) to form a water blocking brim (23); the method is characterized in that: the bottom surface of the water retaining eave (23) is a dome structure (231) with a high middle part and a low periphery so as to block overflow liquid from flowing to the middle of the bottom surface of the water retaining eave (23).

2. The inner ring fire cover of claim 1, wherein: the dome structure (231) is formed by that the bottom surface of the water retaining eave (23) inclines downwards from the middle to the periphery, or the bottom surface of the water retaining eave (23) inclines downwards from inside to outside along the radial direction to form an inclined surface (236).

3. The inner ring fire cover of claim 1, wherein: and an ignition column (232) is arranged on the bottom surface of the water retaining eave (23) and is positioned at the highest position in the middle of the bottom surface of the water retaining eave (23).

4. The inner ring fire cover of claim 1, wherein: and blocking pieces for further blocking the overflow liquid to prevent the overflow liquid from flowing to the middle of the bottom surface of the water blocking eaves (23) are arranged on the periphery of the bottom surface of the water blocking eaves (23).

5. The inner ring fire cover according to claim 4, wherein: the blocking piece is an arc-shaped groove (235) formed in the bottom surface of the water retaining brim (23), and the arc-shaped groove extends along the peripheral outline of the water retaining brim (23).

6. The inner ring fire cover of claim 5, wherein: the arc-shaped grooves (235) are at least two and are distributed at intervals inside and outside.

7. The inner ring fire cover of claim 1, wherein: the connection position of the bottom surface of the water retaining eave (23) and the cover body (2) is provided with a step (201) for blocking overflowing liquid, and the step (201) extends along the circumferential direction of the cover body (2).

8. The inner ring fire cover of claim 7, wherein: the step (201) extends along the circumferential direction of the cover body (2) for a distance greater than the span of the water retaining eaves (23) in the circumferential direction of the cover body (2).

9. The inner ring fire cover of claim 1, wherein: the peripheral wall of the water retaining eaves (23) is of a vertically downward or obliquely downward structure so as to guide overflow to flow down along the structure.

10. The inner ring fire cover of claim 1, wherein: the periphery of the cover body (2) protrudes out of the fire cover body (1) along the horizontal direction to form a waterproof brim (20).

11. The inner ring fire cover of claim 10, wherein: the peripheral wall of the waterproof eaves (20) is provided with a part which extends downwards and is inclined inwards so as to guide overflowing liquid to flow downwards along the part.

12. The inner ring fire cover of claim 10, wherein: the top wall of the cover body (2) is of a closed structure; the top of the cover body (2) is sunken downwards to form a liquid containing groove (21) for collecting overflowing liquid, at least one side of the periphery of the cover body (2) is provided with an opening (22) communicated with the liquid containing groove (21) and used for overflowing liquid to flow out, the opening is arranged to avoid the water retaining brim (23), and the side wall of the fire cover body (1) is provided with a flow guide groove (10) corresponding to the opening (22) and used for overflowing liquid to flow down along the flow guide groove.

13. The inner ring fire cover of claim 12, wherein: the liquid containing tanks (21) are simultaneously distributed on the top surface of the water blocking eaves (23).

14. The inner ring fire cover of claim 12, wherein: the opening (22) extends into the liquid containing groove (21), and the diversion groove (10) is connected with the liquid containing groove (21) through a chamfer.

15. The inner ring fire cover of claim 12, wherein: the projection of the tank bottom of the liquid containing tank (21) on the horizontal plane covers the projection of the fire cover body (1) on the horizontal plane; the caliber of the notch of the liquid containing groove (21) is gradually reduced from top to bottom.

16. A cooker burner using the inner ring fire cover of any claim 1 to 15.