CN215765080U - Central fire cover, burner and gas stove - Google Patents

Abstract

The utility model relates to the technical field of kitchen utensils, in particular to a central fire cover, a burner and a gas stove. The central fire cover comprises a central fire cover body and a fire blocking ring, the fire blocking ring is connected with the central fire cover, a first air channel is formed between the inner walls of the fire blocking ring and the central fire cover body, and the first air channel is located below an inner ring fire outlet of the central fire cover body. When using, will keep off the fire ring cover establish with the gas-cooker prevent the outside of dry combustion method probe, the gas-cooker during operation, keep off the flame that the fire ring can shelter from central fire lid, avoid the direct firing of flame to prevent the dry combustion method probe, simultaneously, the air gets into central fire lid body along first air passage, for the burning of central flame supplyes secondary air, because first air passage is located the below that the inner ring of central fire lid body goes out the fire hole, can effectively avoid central flame to prevent through the palirrhea inside that gets into of first air passage and the firing prevents the dry combustion method probe, guarantee to prevent the accuracy and the sensitivity of dry combustion method probe.

Description

Central fire cover, burner and gas stove

Technical Field

The utility model relates to the technical field of kitchen utensils, in particular to a central fire cover, a burner and a gas stove.

Background

Gas cookers are essential kitchen cooking appliances for daily life of a household, and safety in use thereof is a great concern for consumers. When the gas stove works under the conditions that no cookware is placed or no food materials are contained in the cookware, the cookware is continuously burnt, the temperature of the burner is too high, the cookware and the stove are damaged, even a fire disaster is caused, and the gas stove is a very serious potential safety hazard. At present, the dry-burning prevention gas cooker on the market utilizes the dry-burning prevention device to detect the state of a cooker, and the gas cooker automatically cuts off the gas when dry burning occurs, so that accidents are prevented. Although current combustor has set up annular retaining ring, will prevent dry combustion method probe setting in the inside of annular retaining ring, play thermal-insulated effect, nevertheless still can't prevent that central flame from getting into annular retaining ring, prevent the dry combustion method device and burn, lead to preventing the degree of accuracy and the sensitivity of dry combustion method device and reduce, probably take place the erroneous judgement to the actual state in the pan, user experience feels not good.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a central fire cover, a burner and a gas stove, which are used for relieving the technical problem that the accuracy and the sensitivity of an anti-dry burning device are reduced because central flame enters an annular retainer ring and burns the anti-dry burning device in the prior art.

Based on the purpose, the utility model provides a central fire cover, which comprises a central fire cover body and a fire blocking ring, wherein the fire blocking ring is connected with the central fire cover, a first air channel is formed between the fire blocking ring and the inner wall of the central fire cover body, and the first air channel is positioned below an inner ring fire outlet hole of the central fire cover body.

Furthermore, the lower end face of the fire blocking ring is provided with a groove, and a first air channel is formed between the groove wall of the groove and the inner wall of the central fire cover body.

Furthermore, the lower surface of the central fire cover body is provided with an outer annular air passage and an inner annular air passage, the outer annular air passage and the inner annular air passage are concentrically arranged, and the outer annular air passage is positioned outside the inner annular air passage.

Furthermore, a plurality of fire outlet sections are arranged on the upper surface of the central fire cover body, and a gap is formed between every two adjacent fire outlet sections to form a second air channel; go out the fire section and be provided with first outer ring fire outlet, the circumference outer wall of center fire lid body is provided with second outer ring fire outlet, first outer ring fire outlet with second outer ring fire outlet all with outer loop air flue intercommunication.

Furthermore, the circumference inner wall of center fire lid body is provided with annular fire outlet groove, the setting of inner ring fire outlet hole is in annular fire outlet groove is close to on the cell wall of the lower surface of center fire lid body, just inner ring fire outlet hole with the inner ring air flue intercommunication.

Further, the distance between the inner ring fire outlet groove and the lower surface of the central fire cover body is greater than the distance between the first outer ring fire outlet hole and the lower surface of the central fire cover body.

Furthermore, an annular guide inclined plane is arranged between the groove wall of the annular fire outlet groove, which is close to the lower surface of the central fire cover body, and the circumferential inner wall of the central fire cover body, and the inner ring edge of the annular guide inclined plane is positioned below the outer ring edge of the annular guide inclined plane.

Further, the lower surface of the central fire cover body is provided with a flame stabilizing hole, the flame stabilizing hole is used for corresponding to the position of the thermocouple, the flame stabilizing hole is located below the second air channel, and the flame stabilizing hole is communicated with the inner ring air channel.

Furthermore, keep off the fire ring with center fire lid body detachable connection.

Furthermore, the surface of keeping off the fire ring is provided with the external screw thread section, the circumference inner wall of center fire lid body be provided with external screw thread section matched with internal thread section.

Further, the groove is located on the external thread section.

Based on the above purpose, the utility model also provides a burner, which comprises the central fire cover.

Further, the combustor still includes the furnace end, the furnace end is provided with central inner ring and draws and penetrates the pipe and central outer loop and draw and penetrate the pipe, central inner ring draws and penetrates pipe and inner ring air flue intercommunication, central outer loop draws and penetrates pipe and outer loop air flue intercommunication.

Further, the combustor also comprises an outer ring fire cover;

the furnace end comprises a central seat and an outer ring seat, the central seat and the outer ring seat are concentrically arranged, and the outer ring seat is positioned outside the central seat; the central fire cover body is fastened and fixed on the central seat, and the outer ring fire cover is fastened and fixed on the outer ring seat.

Based on the aim, the utility model also provides the gas stove which comprises an anti-dry heating probe and the burner, wherein the anti-dry heating probe is arranged in the fire blocking ring in a penetrating way.

Furthermore, the inner ring surface of the fire blocking ring and the outer peripheral surface of the dry burning prevention probe are arranged in a clearance mode.

Compared with the prior art, the utility model has the following beneficial effects:

the central fire cover comprises a central fire cover body and a fire blocking ring, wherein the fire blocking ring is connected with the central fire cover, a first air channel is formed between the fire blocking ring and the inner wall of the central fire cover body, and the first air channel is positioned below an inner ring fire outlet of the central fire cover body.

Based on the structure, when the central fire cover is used, the fire blocking ring is sleeved outside the anti-dry-burning probe of the gas stove, when the gas stove works, the fire blocking ring can block flame of the central fire cover to prevent the flame from directly burning the anti-dry-burning probe, meanwhile, air enters the central fire cover body along the first air channel to supplement secondary air for burning of the central flame, and because the first air channel is located below the inner ring fire outlet hole of the central fire cover body, the central flame can be effectively prevented from reversely flowing into the interior of the fire blocking ring through the first air channel to burn the anti-dry-burning probe, and accuracy and sensitivity of the anti-dry-burning probe are guaranteed.

The burner provided by the utility model has the advantages that due to the use of the central fire cover provided by the utility model, the central flame can be ensured to be fully combusted, and the anti-dry-burning probe can be effectively prevented from being burnt to ensure the normal use of the anti-dry-burning function.

The gas stove provided by the utility model can ensure that the central flame is fully combusted due to the use of the burner provided by the utility model, and can effectively prevent the anti-dry-burning probe from being burnt to ensure the normal use of the anti-dry-burning function.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of a central fire cover according to an embodiment of the present invention;

FIG. 2 is an exploded view of a center fire cover provided by an embodiment of the present invention;

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

FIG. 4 is a cross-sectional view of another cross-section of a center fire cover provided in accordance with an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another perspective view of a fire center cover according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a burner provided in an embodiment of the present invention;

fig. 7 is a schematic view of a gas cooker provided by an embodiment of the utility model in a state of being placed with a pot.

Icon: 1-central fire lid body; 2-fire-blocking ring; 3-a first air channel; 4-external thread section; 5-internal thread section; 6-groove; 7-outer annular airway; 8-inner ring air passage; 9-a fire outlet section; 10-a second air channel; 11-a first outer ring fire outlet; 12-second outer ring fire outlet; 13-annular fire outlet groove; 14-inner ring fire outlet; 15-annular guide slope; 16-flame stabilizing holes; 17-a furnace end; 18-a central inner ring ejector tube; 19-a central outer ring ejector tube; 20-a central seat; 21-outer ring seat; 22-outer ring fire cover; 23-dry burning prevention probe; and 24-a pot.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, the present embodiment provides a central fire cover, which includes a central fire cover body 1 and a fire-blocking ring 2, wherein the fire-blocking ring 2 is connected to the central fire cover, a first air channel 3 is formed between the fire-blocking ring 2 and the inner wall of the central fire cover body 1, and the first air channel 3 is located below an inner ring fire outlet 14 of the central fire cover body 1.

Based on this structure, the center fire lid that this embodiment provided, when using, will keep off 2 covers of fire ring and establish the outside with the anti-dry combustion method probe 23 of gas-cooker, the gas-cooker during operation, keep off the flame that fire ring 2 can shelter from center fire lid, avoid the direct firing of flame to prevent dry combustion method probe 23, and simultaneously, the air gets into center fire lid body 1 along first air passage 3, for the burning supplementary secondary air of center flame, because first air passage 3 is located the below of the inner ring fire outlet 14 of center fire lid body 1, can effectively avoid center flame to get into the inside of keeping off fire ring 2 through the palirrhea of first air passage 3 and prevent dry combustion method probe 23, guarantee to prevent accuracy and the sensitivity of dry combustion method probe 23.

Further, the fire-stopping ring 2 is detachably connected with the central fire cover body 1.

The fire blocking ring 2 is connected to the central fire cover body 1, so that the problem that the dry burning prevention probe 23 fails due to overhigh temperature when the gas stove works can be avoided.

After the fire-blocking ring 2 is detached, the central fire cover body 1 can be applied to a common cooker without an anti-dry burning probe 23.

In this embodiment, the fire-stopping ring 2 is a tubular structure, an external thread section 4 is arranged on the outer surface of the fire-stopping ring 2, and an internal thread section 5 matched with the external thread section 4 is arranged on the circumferential inner wall of the central fire cover body 1.

The external thread section 4 is arranged at the position close to the bottom of the outer surface of the fire-blocking ring 2. The fire-blocking ring 2 is screwed and fixed on the central fire cover body 1 through the mutual matching of the external thread section 4 and the internal thread section 5.

It should be noted that, the fire-stop ring 2 and the central fire cover body 1 can also be detachably connected by other methods, for example: keep off fire ring 2 and central fire lid body 1 and be connected through the plug mode.

Further, the lower end face of the fire-blocking ring 2 is provided with a groove 6, and a first air channel 3 is formed between the groove wall of the groove 6 and the inner wall of the central fire cover body 1.

Referring to fig. 5, the number of the grooves 6 is four, and four grooves 6 are uniformly spaced at the lower end surface of the fire damper ring 2, that is, the number of the first air passages 3 is four.

It should be noted that the number of the grooves 6 is not limited to four.

Further, a groove 6 is located on the external thread section 4. Specifically, the one-turn male thread section 4 in this embodiment is sectioned into four arc-shaped sections by four grooves 6. The mode does not influence the detachable connection between the fire-blocking ring 2 and the central fire cover body 1, and can ensure that secondary air is fully mixed with central flame outside the fire-blocking ring 2 after passing through the first air channel 3.

Further, the lower surface of center fire lid body 1 is provided with outer ring air flue 7 and inner ring air flue 8, and outer ring air flue 7 sets up with inner ring air flue 8 is concentric, and outer ring air flue 7 is located the outside of inner ring air flue 8.

Optionally, the outer annular air passage 7 and the inner annular air passage 8 are both annular grooves. The outer annular air passage 7 and the inner annular air passage 8 are not communicated with each other. When the burner is used, the outer annular air passage 7 is used for supplying air through the central outer annular injection pipe 19 of the burner 17, the inner annular air passage 8 is used for supplying air through the central inner annular injection pipe 18 of the burner 17, the central fire cover body 1 forms a double-ring fire outlet structure with independent air supply of the inner ring and the outer ring, different fire requirements can be met, and the application range is wide.

Furthermore, a plurality of fire outlet sections 9 are arranged on the upper surface of the central fire cover body 1, and a gap is formed between every two adjacent fire outlet sections 9 to form a second air channel 10; go out fire section 9 and be provided with first outer ring and go out fire hole 11, the circumference outer wall that center fire covered body 1 is provided with second outer ring and goes out fire hole 12, and first outer ring goes out fire hole 11 and second outer ring and goes out fire hole 12 and all communicate with outer ring air flue 7.

The air around the central fire cover body 1 can flow to the outer ring fire outlet and the inner ring fire outlet 14 of the central fire cover body 1 through the second air channel 10, which is beneficial to supplement secondary air to the outer ring flame and the central flame and improves the combustion efficiency of the flame.

Specifically, the central fire lid body 1 includes a hollow circular table portion and a hollow cylindrical portion, the hollow circular table portion is located on an upper surface of the hollow cylindrical portion, and optionally, the hollow circular table portion is located in the hollow cylindrical portion in an integrally formed arrangement. A plurality of fire outlet sections 9 are arranged on the circumferential surface of the hollow circular table part, and a gap is arranged between every two adjacent fire outlet sections 9 to form a second air channel 10; the number of first outer ring fire outlet holes 11 is a plurality of, and a plurality of first outer ring fire outlet holes 11 are along the even interval setting of the circumference of fire outlet section 9, and first outer ring fire outlet holes 11 extend to the annular tank bottom of outer ring air flue 7 to communicate with outer ring air flue 7.

The second outer ring fire outlet 12 is arranged on the circumferential surface of the hollow cylindrical part, and the second outer ring fire outlet 12 also extends to the annular groove bottom of the outer ring air passage 7 and is communicated with the outer ring air passage 7. On the annular groove bottom of the outer annular air flue 7, a first outer ring fire outlet 11 and a second outer ring fire outlet 12 are alternately arranged.

Optionally, the number of the second outer ring fire outlets 12 is plural, and the plural second outer ring fire outlets 12 are arranged at regular intervals along the circumferential surface of the hollow cylindrical portion.

Optionally, the diameter of the first outer ring fire hole 11 is larger than that of the second outer ring fire hole 12.

Further, the circumference inner wall of center fire lid body 1 is provided with annular fire outlet groove 13, and inner ring fire outlet hole 14 sets up on the cell wall that is close to the lower surface of center fire lid body 1 of annular fire outlet groove 13, and inner ring fire outlet hole 14 and inner ring air flue 8 intercommunication. The inner ring fire outlet 14 extends to the annular groove bottom of the inner ring air flue 8 and is communicated with the inner ring air flue 8.

In this embodiment, the wall of the inner ring fire outlet groove is parallel to the lower surface of the central fire cover body 1.

It should be noted that the groove wall of the inner ring fire outlet groove may also be arranged at an inclination angle with the lower surface of the central fire cover body 1.

Further, as shown in fig. 4, the distance between the inner ring fire outlet groove and the lower surface of the central fire cover body 1 is greater than the distance between the first outer ring fire outlet hole 11 and the lower surface of the central fire cover body 1.

The direction of the arrows in fig. 4 indicates the flow direction of the gas. Because the load of the inner ring flame is smaller, the length of the flame is shorter, and the distance between the inner ring fire outlet groove and the pot bottom is shorter, the central flame can be favorably heated just to the pot bottom, and the utilization efficiency of the inner ring flame is improved. The burning position of outer loop flame is lower, and the burning position of inner ring flame is higher, with outer loop flame and inner ring flame staggered layer design, has reduced when the flame burning to the robbing of secondary air, is favorable to outer loop flame and inner ring flame's abundant and burning uniformly.

Further, an annular guide inclined plane 15 is arranged between the groove wall of the annular fire outlet groove 13 close to the lower surface of the central fire cover body 1 and the circumferential inner wall of the central fire cover body 1, and the inner ring edge of the annular guide inclined plane 15 is positioned below the outer ring edge of the annular guide inclined plane 15.

Specifically, referring to fig. 2 and 3, the annular guiding inclined surface 15 is flared, and the cross-sectional area of the annular guiding inclined surface 15 gradually decreases from the end of the annular guiding inclined surface 15 connected with the groove wall of the annular fire outlet groove 13 to the end of the annular guiding inclined surface 15 connected with the circumferential inner wall of the central fire cover body 1. In such a way, the secondary air can be guided, so that the secondary air can smoothly enter the annular fire outlet groove 13. Meanwhile, when liquid drips on the central fire cover body 1 above the burner, the liquid flows out along the annular guide inclined plane 15, so that the annular fire outlet groove 13 can be prevented from being blocked by the liquid.

Further, as shown in fig. 5, the lower surface of the central fire cover body 1 is provided with a flame stabilizing hole 16, the flame stabilizing hole 16 is used for corresponding to the position of the thermocouple, the flame stabilizing hole 16 is located below the second air channel 10, and the flame stabilizing hole 16 is communicated with the inner ring air channel 8.

When the burner works, the inner ring air channel 8 supplies air to the flame stabilizing hole 16, and flame exists at the flame stabilizing hole 16, so that the thermocouple can sense the temperature of the flame. The flame stabilizing hole 16 is located below the second air channel 10, and is not arranged at the top of the central flame cover body 1, so that when liquid drips above the burner, the situation that the flame stabilizing hole 16 is blocked due to the fact that the liquid drips in the flame stabilizing hole 16 can be avoided, and the normal work of the thermocouple is guaranteed.

Referring to fig. 6, the present embodiment further provides a burner including the center fire cover provided in the present embodiment.

Further, the combustor further comprises a furnace end 17, the furnace end 17 is provided with a central inner ring injection pipe 18 and a central outer ring injection pipe 19, the central inner ring injection pipe 18 is communicated with the inner ring air passage 8, and the central outer ring injection pipe 19 is communicated with the outer ring air passage 7.

Referring to fig. 7, solid arrows indicate the flow direction of the fuel gas supplied from the central inner ring ejector pipe 18 to the inner ring air passage 8, and hollow arrows indicate the flow direction of the fuel gas supplied from the central outer ring ejector pipe 19 to the outer ring air passage 7. Two paths of fuel gas are not interfered with each other, a double-ring fire outlet structure with independent gas supply of the inner ring and the outer ring is formed, and different fire requirements can be met.

Further, the burner also includes an outer ring fire cover 22; the burner 17 comprises a central seat 20 and an outer ring seat 21, the central seat 20 and the outer ring seat 21 are concentrically arranged, and the outer ring seat 21 is positioned outside the central seat 20; the central fire cover body 1 is buckled and fixed on the central seat 20, and the outer ring fire cover 22 is buckled and fixed on the outer ring seat 21.

Optionally, the upper surface of the central seat 20 is provided with a first annular recess, the lower surface of the central fire cover body 1 is provided with a first annular protrusion, and the first annular protrusion is limited in the first annular recess, so as to connect the central fire cover body 1 and the central seat 20. The outer ring seat 21 is provided with a second annular bulge, the lower surface of the outer ring fire cover 22 is provided with a second annular recess, and the second annular bulge is limited in the second annular recess to realize the connection between the outer ring fire cover 22 and the outer ring seat 21.

The burner provided by the embodiment not only can ensure the full combustion of central flame, but also can effectively prevent the anti-dry-burning probe 23 from being burnt to ensure the normal use of the anti-dry-burning function due to the use of the central fire cover provided by the embodiment.

Referring to fig. 7, the embodiment further provides a gas stove, which includes an anti-dry heating probe 23 and the burner provided in the embodiment, wherein the anti-dry heating probe 23 is inserted into the fire-blocking ring 2.

The bottom of the dry-burning prevention probe 23 is provided with a spring, when the pot 24 is placed on the burner, the pot 24 presses the dry-burning prevention probe 23 downwards, so that the dry-burning prevention probe 23 is positioned inside the fire-blocking ring 2.

Further, the inner ring surface of the fire-blocking ring 2 is provided with a gap from the outer peripheral surface of the dry-burning prevention probe 23.

Specifically, the diameter of the inner annular surface of the fire-blocking ring 2 is greater than the maximum outer diameter of the anti-dry heating probe 23, and a gap is ensured between the inner annular surface of the fire-blocking ring 2 and the outer peripheral surface of the anti-dry heating probe 23, so that the anti-dry heating probe 23 can move up and down smoothly, ventilation and heat dissipation of the anti-dry heating probe 23 are facilitated, and the anti-dry heating probe 23 is well protected.

The gas stove provided by the embodiment can ensure that the central flame is fully combusted due to the burner provided by the embodiment, and can effectively prevent the anti-dry heating probe 23 from being burnt to ensure the normal use of the anti-dry heating function.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (16)

1. The utility model provides a central fire lid, its characterized in that, includes central fire lid body (1) and keeps off fire ring (2), keep off fire ring (2) with central fire lid is connected, just keep off fire ring (2) with be formed with first air channel (3) between the inner wall of central fire lid body (1), first air channel (3) are located the below of the inner ring of central fire lid body (1) goes out fire hole (14).

2. The fire center cover according to claim 1, wherein the fire baffle ring (2) is provided with a groove (6) at the lower end surface, and the first air channel (3) is formed between the groove wall of the groove (6) and the inner wall of the fire center cover body (1).

3. The center fire cover according to claim 1, characterized in that the lower surface of the center fire cover body (1) is provided with an outer annular air passage (7) and an inner annular air passage (8), the outer annular air passage (7) and the inner annular air passage (8) are concentrically arranged, and the outer annular air passage (7) is located outside the inner annular air passage (8).

4. The central fire cover according to claim 3, characterized in that the upper surface of the central fire cover body (1) is provided with a plurality of fire outlet sections (9), and a gap is arranged between two adjacent fire outlet sections (9) to form a second air channel (10); go out fire section (9) and be provided with first outer loop and go out fire hole (11), the circumference outer wall of center fire lid body (1) is provided with second outer loop and goes out fire hole (12), first outer loop go out fire hole (11) with second outer loop goes out fire hole (12) all with outer loop air flue (7) intercommunication.

5. The central fire cover according to claim 4, characterized in that the circumferential inner wall of the central fire cover body (1) is provided with an annular fire outlet groove (13), the inner ring fire outlet hole (14) is arranged on the groove wall of the annular fire outlet groove (13) close to the lower surface of the central fire cover body (1), and the inner ring fire outlet hole (14) is communicated with the inner ring air passage (8).

6. The fire center cover according to claim 5, wherein the distance between the inner ring fire exit groove and the lower surface of the fire center cover body (1) is greater than the distance between the first outer ring fire exit hole (11) and the lower surface of the fire center cover body (1).

7. The fire center cover according to claim 5, wherein an annular guide slope (15) is provided between a groove wall of the annular fire outlet groove (13) close to the lower surface of the fire center cover body (1) and the circumferential inner wall of the fire center cover body (1), and an inner annular edge of the annular guide slope (15) is located below an outer annular edge of the annular guide slope (15).

8. The central fire cover according to claim 4, characterized in that a flame stabilizing hole (16) is arranged on the lower surface of the central fire cover body (1), the flame stabilizing hole (16) is used for corresponding to the position of a thermocouple, the flame stabilizing hole (16) is positioned below the second air channel (10), and the flame stabilizing hole (16) is communicated with the inner ring air channel (8).

9. Center fire cover according to any of claims 1-8, characterized in that the fire stop ring (2) is detachably connected with the center fire cover body (1).

10. The fire centre cap according to any one of claims 2 to 8, wherein the outer surface of the fire stop ring (2) is provided with an external threaded section (4), and the inner circumferential wall of the fire centre cap body (1) is provided with an internal threaded section (5) cooperating with the external threaded section (4).

11. Fire centre cover according to claim 10, characterised in that a groove (6) is located on the external threaded section (4).

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

13. The burner according to claim 12, further comprising a burner (17), wherein the burner (17) is provided with a central inner ring ejector pipe (18) and a central outer ring ejector pipe (19), the central inner ring ejector pipe (18) is communicated with the inner ring air passage (8), and the central outer ring ejector pipe (19) is communicated with the outer ring air passage (7).

14. The burner of claim 13, further comprising an outer ring flame cover (22);

the furnace end (17) comprises a central seat (20) and an outer ring seat (21), the central seat (20) and the outer ring seat (21) are concentrically arranged, and the outer ring seat (21) is positioned outside the central seat (20); the central fire cover body (1) is fastened and fixed on the central seat (20), and the outer ring fire cover (22) is fastened and fixed on the outer ring seat (21).

15. Gas burner, characterized in that it comprises an anti-dry heating probe (23) and a burner according to any one of claims 12 to 14, said anti-dry heating probe (23) being inserted in said flame-guard ring (2).

16. Gas burner according to claim 15, characterized in that the inner ring surface of the flame-proof ring (2) is arranged in a gap with the outer peripheral surface of the dry-burning prevention probe (23).

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