CN217843961U - Central fire cover and combustor - Google Patents

Abstract

The utility model provides a central fire cover and a burner, relating to the technical field of gas cookers, wherein the central fire cover comprises a central fire cover body, a first central hole, a double-surrounding ring structure and an anti-dry burning device; the central fire cover body is provided with an annular gas mixing cavity, and the outer wall of the central fire cover body is provided with a fire outlet; the double-surrounding ring structure is provided with a second central hole and an annular cavity, and the annular cavity can be communicated with the second central hole and the outside; the dry burning preventing device is arranged in the first central hole and the second central hole. The burner includes a central fire cap. The technical problems that the dry burning prevention device interferes with the temperature of the detection pot bottom in the combustion working process, so that the dry burning prevention protection function is abnormal and potential safety hazards exist are solved, the temperature field around the dry burning prevention device is reduced, and the technical effect that the flame burning temperature of the central fire cover influences the dry burning prevention device is further reduced.

Description

Central fire cover and combustor

Technical Field

The utility model belongs to the technical field of the technique of gas cooking utensils and specifically relates to a center fire lid and combustor are related to.

Background

As a kitchen utensil necessary for cooking in daily life of a family, the dry burning prevention safety of the gas cooker needs to be improved continuously along with the continuous development of the society. At present, some dry-burning prevention gas cookers appear in the market, and dry-burning prevention devices such as temperature sensors are arranged, generally, the temperature sensors are arranged in the center of a burner to detect the temperature of a pot bottom, and the purpose of dry-burning automatic flameout is achieved.

However, since the dry-burning prevention device (temperature sensor) is susceptible to the temperature of flame ignition, its accuracy, life, and the like are susceptible to the influence of the burning flame. In order to solve the problems, some manufacturers arrange a through hole or simply additionally arrange an enclosing ring in the middle of a central fire cover, but the heat insulation protection effect is poor, and an anti-dry heating device can interfere with the temperature of a detected pot bottom in the combustion working process, so that the anti-dry heating protection function is abnormal, and potential safety hazards exist; in addition, the problem that the flame of the central fire cover of the burner is not fully combusted, and a large amount of waste gas is generated is also caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a central fire lid and combustor to alleviate the thermal-insulated protective effect of the central fire lid of combustor that exists among the prior art not good, can make in the combustion operation process prevent dry combustion method device to detecting bottom of a boiler temperature and produce the interference, so that prevent dry combustion method protect function unusual, have the technical problem of potential safety hazard.

In a first aspect, the present invention provides a central fire cover, including: the fire prevention cover comprises a central fire cover body, a first central hole arranged in the central fire cover body, a double-surrounding ring structure arranged at the upper end of the central fire cover body and an anti-dry burning device;

the central fire cover body is provided with an annular gas mixing cavity arranged around the first central hole, and the outer wall of the central fire cover body is provided with a fire outlet communicated with the annular gas mixing cavity;

the double-surrounding ring structure is provided with a second central hole communicated with the first central hole, and is also provided with an annular cavity which can be communicated with the second central hole and the outside and is used for supplementing air to the fire outlet;

the dry burning preventing device is arranged in the first center hole and the second center hole.

Further, the double-surrounding ring structure comprises an inner ring and an outer ring surrounding the outer periphery of the inner ring, and the inner ring and the outer ring surround the annular cavity;

the inner ring is provided with a through hole communicated with the annular cavity.

Further, the inner diameter of the second central hole is larger than the inner diameter of the first central hole.

Further, the inner diameter of the first central hole is larger than the outer diameter of the dry burning prevention device;

or an annular gap is reserved between the hole wall of the first central hole and the outer peripheral wall of the dry burning prevention device.

Further, the outer diameter of the outer ring is smaller than that of the central fire cover body.

Furthermore, the upper end of the inner ring and the upper end of the outer ring are integrally connected, and the inner ring and the outer ring enclose the annular cavity;

the lower end of the inner ring is integrally connected with the upper end of the central fire cover body;

and a gap is reserved between the lower end of the outer ring and the upper end of the central fire cover body to form an opening for communicating the annular cavity with the outside.

Furthermore, the upper end surface of the central fire cover body is an inclined surface which is inclined downwards gradually from the center to the outside along the radial direction.

Furthermore, the fire outlet holes are inclined holes which are gradually inclined downwards from outside to inside along the radial direction.

Further, the lower edge of the outer ring is lower than the lowest edge of the through hole.

Has the advantages that:

the utility model provides a central fire cover, the central fire cover body is provided with an annular gas mixing cavity arranged around a first central hole, the outer wall of the central fire cover body is provided with a fire outlet communicated with the annular gas mixing cavity, and gas can be supplemented to the fire outlet through the annular gas mixing cavity; meanwhile, the double-surrounding ring structure is provided with a second central hole communicated with the first central hole, and is also provided with an annular cavity, and the annular cavity can be communicated with the second central hole and the outside, so that secondary air required by flame combustion can be supplemented, the combustion is more sufficient, the generation of waste gas is reduced, and the combustion effect is enhanced; in addition, the dry burning prevention device is arranged in the first central hole and the second central hole, and a double-layer cavity heat insulation can be formed by the double-surrounding ring structure, so that the heat insulation and protection effects of the dry burning prevention device are enhanced; in addition, the annular cavity is matched with the through hole, the second center hole is communicated with the external environment, air flow continuously flows in, and the temperature field around the dry burning preventing device is effectively reduced, so that the influence of the flame burning temperature of the central fire cover on the dry burning preventing device is further reduced.

In a second aspect, the present invention provides a burner, comprising: a burner base and a central fire cap according to any one of the preceding embodiments;

the central fire cover body seat is arranged on the furnace head seat.

Has the advantages that:

the utility model provides a combustor includes aforementioned central fire lid, from this, technical advantage and effect that this combustor can reach include technical advantage and effect that central fire lid can reach equally, no longer give unnecessary details here.

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 embodiments or the technical solutions in 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

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

fig. 2 is a cross-sectional view of the central fire cover and the stove head base according to the embodiment of the present invention.

An icon:

100-central fire lid body; 110-a first central aperture; 120-annular gas mixing cavity; 130-fire holes; 140-inclined plane;

200-double-surrounding ring structure; 210-a second central aperture; 220-an annular cavity; 230-inner ring; 240-outer ring; 221-an opening; 241-through holes;

300-dry burning prevention device;

400-hearth seat.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1 and 2, the present embodiment provides a central fire lid, which includes a central fire lid body 100, a first central hole 110 formed in the central fire lid body 100, a double surrounding ring structure 200 formed at an upper end of the central fire lid body 100, and an anti-dry heating apparatus 300; the central fire cover body 100 is provided with an annular gas mixing cavity 120 arranged around the first central hole 110, and the outer wall of the central fire cover body 100 is provided with a fire outlet 130 communicated with the annular gas mixing cavity 120; the double-shroud ring structure 200 has a second center hole 210 communicated with the first center hole 110, the double-shroud ring structure 200 further has an annular cavity 220, and the annular cavity 220 can be communicated with the second center hole 210 and the outside and is used for supplementing air to the fire outlet holes 130; the dry burning prevention device 300 is disposed in the first and second center holes 110 and 210.

In the central fire cover provided by the embodiment, the gas can be supplemented to the fire outlet 130 through the annular gas mixing cavity 120; meanwhile, the double-surrounding ring structure 200 is provided with a second central hole 210 communicated with the first central hole 110, the double-surrounding ring structure 200 is also provided with an annular cavity 220, and the annular cavity 220 can be communicated with the second central hole 210 and the outside, so that secondary air required by flame combustion can be supplemented, the combustion is more sufficient, the generation of waste gas is reduced, and the combustion effect is enhanced; in addition, the dry burning prevention device 300 is arranged in the first center hole 110 and the second center hole 210, and the double-surrounding ring structure 200 can form a double-layer cavity for heat insulation, so that the heat insulation and protection effects of the dry burning prevention device 300 are enhanced; in addition, the annular cavity 220 and the through hole 241 are matched to realize the communication between the second central hole 210 and the external environment, and the air flow continuously flows in, so that the temperature field around the dry burning prevention device 300 is effectively reduced, and the influence of the flame burning temperature of the central fire cover on the dry burning prevention device 300 is further reduced.

Specifically, the annular air mixing chamber 120 is formed between the wall of the first central hole 110 and the outer wall of the central fire cover body 100, and a plurality of fire outlets 130 are circumferentially formed on the outer wall of the central fire cover body 100.

The double-surrounding ring structure 200 is arranged at the upper end of the central fire cover body 100, and isolates the flame of the central fire cover body 100 from the dry burning prevention device 300, so as to reduce the influence of the temperature of flame burning of the central fire cover body 100 on the dry burning prevention device 300; the upper end surface of the dry-burning prevention device 300 should be higher than the upper end surface of the double-surrounding ring structure 200 to ensure that the pot is placed on the dry-burning prevention device 300 and contacts with the bottom of the pot, thereby ensuring accurate measurement of the temperature of the bottom of the pot.

Referring to fig. 2, the double-surrounding ring structure 200 includes an inner ring 230 and an outer ring 240 surrounding the outer periphery of the inner ring 230, the inner ring 230 and the outer ring 240 surrounding an annular cavity 220; the inner ring 230 is provided with a through hole 241 communicating with the annular cavity 220.

In one embodiment of the present application, the upper end of the inner ring 230 is integrally connected with the upper end of the outer ring 240, and both enclose the annular cavity 220; the lower end of the inner ring 230 is integrally connected with the upper end of the central fire cover body 100; a space is left between the lower end of the outer ring 240 and the upper end of the central fire lid body 100 to form an opening 221 for communicating the annular cavity 220 with the outside.

Specifically, the double-surrounding ring structure 200 includes an inner ring 230 and an outer ring 240, the upper end of the inner ring 230 is connected with the upper end of the outer ring 240, the side wall of the inner ring 230 is provided with a plurality of through holes 241 along the circumferential direction, the lower end of the inner ring 230 is connected with the upper end face of the central fire cover body 100, a gap is arranged between the lower end of the outer ring 240 and the upper end face of the central fire cover body 100, and a circular ring-shaped cavity 220 with an opening 221 at one end is formed between the lower end of the inner ring 230 and the upper end face of the central fire cover body 100, so that a supplementary channel of secondary air required by flame combustion of the central fire cover is formed, namely, the external air below the furnace base 400 enters the first central hole 110 and the second central hole 210, and flows to the fire outlet 130 on the outer side wall of the central fire cover body 100 through the through hole 241 on the side wall of the inner ring 230 after being preheated in the circular cavity 220 and passing through the opening 221 between the lower end of the outer ring 240 and the upper end face of the central fire cover body 100, so as to timely supplement the secondary air required by the flame combustion of the central fire cover body 100, so that the secondary air can be more sufficient combustion, thereby reducing the generation of waste gas and enhancing the combustion effect; meanwhile, the double-surrounding ring structure with the annular cavity 220 forms double-layer cavity heat insulation, so that the heat insulation protection effect of the dry burning prevention device 300 is enhanced; in addition, the penetration with the external space is realized, the air flow continuously flows in, the temperature field around the dry burning prevention device 300 is effectively reduced, and the influence of the flame burning temperature of the central fire cover body 100 on the dry burning prevention device 300 is further reduced.

Referring to fig. 2, the second central hole 210 has an inner diameter greater than that of the first central hole 110, so that the space between the inner ring 230 of the double-surrounding ring structure 200 and the dry burning prevention device 300 is larger.

Further, the inner diameter of the first central hole 110 is larger than the outer diameter of the dry burning prevention device 300; alternatively, an annular gap is left between the hole wall of the first central hole 110 and the outer circumferential wall of the dry burning prevention device 300.

Illustratively, the annular gap is at least greater than 4mm (i.e. the unilateral interval is greater than 2 mm), and the arrangement of the annular gap avoids the direct contact between the dry burning prevention device 300 and the hole wall of the first central hole 110, effectively prevents the heat on the central fire cover body 100 from being transferred to the dry burning prevention device 300 through heat conduction, and ensures the normal function of the dry burning prevention device 300.

Furthermore, the lower edge of the outer ring 240 is lower than the lowest edge of the through hole 241, so as to ensure that the influence of the combustion flame and the high-temperature flue gas directly passing through the through hole 241 on the side wall of the inner ring 230 on the dry burning prevention device 300 can be effectively avoided.

Referring to fig. 2, the outer diameter of the outer ring 240 is smaller than the outer diameter of the central fire cover body 100, so as to prevent the flame of the central fire cover from burning to the outer ring 240 of the double-surrounding ring structure 200, thereby providing better isolation and protection effects between the flame of the central fire cover and the dry burning prevention device 300.

Referring to fig. 2 again, the upper end surface of the central fire cover body 100 is an inclined surface 140 that is gradually inclined downward from the center in a radial direction, and the inclined surface 140 can guide the air flow so that more air flow (or secondary air) flows toward the fire outlet 130.

Further, the fire outlet 130 is an inclined hole which is gradually inclined downwards from outside to inside along the radial direction, which is beneficial to forming middle ring flame and is beneficial to the inclined surface 140 guiding airflow to flow to the fire outlet 130.

The present embodiment further provides a burner, which comprises a burner base 400 and the aforementioned central fire cover; the central fire cover body 100 is seated on the burner base 400. The burner provided by the embodiment comprises the central fire cover, so that the technical advantages and effects achieved by the burner also comprise the technical advantages and effects achieved by the central fire cover, and the technical advantages and effects are not described in detail herein.

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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims (10)

1. A fire center cover, comprising: the fire prevention cover comprises a central fire cover body (100), a first central hole (110) arranged in the central fire cover body (100), a double-surrounding ring structure (200) arranged at the upper end of the central fire cover body (100) and an anti-dry burning device (300);

the central fire cover body (100) is provided with an annular gas mixing cavity (120) which is arranged around the first central hole (110), and the outer wall of the central fire cover body (100) is provided with a fire outlet (130) which is communicated with the annular gas mixing cavity (120);

the double-surrounding ring structure (200) is provided with a second central hole (210) communicated with the first central hole (110), the double-surrounding ring structure (200) is further provided with an annular cavity (220), and the annular cavity (220) can be communicated with the second central hole (210) and the outside and is used for supplementing air to the fire outlet holes (130);

the dry burning prevention device (300) is disposed in the first center hole (110) and the second center hole (210).

2. The center fire cover according to claim 1, characterized in that the double surrounding ring structure (200) comprises an inner ring (230) and an outer ring (240) surrounding the outer periphery side of the inner ring (230), the inner ring (230) and the outer ring (240) surrounding the annular cavity (220);

the inner ring (230) is provided with a through hole (241) communicating with the annular cavity (220).

3. The fire center cover of claim 2, wherein said second central bore (210) has an inner diameter greater than an inner diameter of said first central bore (110).

4. The center fire cover according to claim 3, wherein the first center hole (110) has an inner diameter larger than an outer diameter of the dry burning prevention means (300);

or an annular gap is reserved between the hole wall of the first central hole (110) and the outer peripheral wall of the dry burning prevention device (300).

5. The fire center cover of claim 2, wherein the outer ring (240) has an outer diameter smaller than an outer diameter of the fire center cover body (100).

6. The center fire cover according to claim 5, wherein the upper end of the inner ring (230) is integrally connected with the upper end of the outer ring (240), and both enclose the annular cavity (220);

the lower end of the inner ring (230) is integrally connected with the upper end of the central fire cover body (100);

and a gap is reserved between the lower end of the outer ring (240) and the upper end of the central fire cover body (100) to form an opening (221) for communicating the annular cavity (220) with the outside.

7. The center fire cover according to claim 6, wherein the upper end surface of the center fire cover body (100) is an inclined surface (140) which is gradually inclined downward from the center radially outward.

8. The center fire cover according to claim 7, wherein the fire outlet holes (130) are inclined holes which are gradually inclined downwards in a radial direction from the outside to the inside.

9. The center fire cover according to claim 2, wherein a lower end edge of the outer ring (240) is lower than a lowest hole edge of the through hole (241).

10. A burner, comprising: a burner base (400) and a central fire cover according to any one of claims 1 to 9;

the central fire cover body (100) is arranged on the stove head seat (400).

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