Burner fire cover

Abstract

The present invention relates to a burner fire cover, comprising an annular fire cover body, the fire cover body comprising a top wall and inner and outer annular walls, the outer annular wall being provided with fire outlet holes and flame stabilizing holes along the circumferential direction, the channel of the flame stabilizing hole extending upward from the inside to the outside along the outer annular wall, the fire outlet hole being provided below the flame stabilizing hole, the outer peripheral wall at the upper end of the fire cover body extending outward along the circumferential direction to form an annular flame stabilizing eaves, the flame stabilizing eaves can shield the above-mentioned flame stabilizing hole from the horizontal direction, and the main flame in the main fire hole is lower than the flame stabilizing eaves and can at least burn outward along the lowest point of the flame stabilizing eaves, and the gap between the flame stabilizing eaves and the outer annular wall forms a flame stabilizing groove. The flame stabilizing eaves in the present invention can prevent overflow from flowing into the flame stabilizing hole, and the airflow velocity in the flame stabilizing hole is reduced, the flame is more stable, and thus the flame stabilizing effect is better, the main flame in the main fire hole can heat the overflow flowing along the top wall to the flame stabilizing eaves, which can not only prevent the liquid from entering the main fire hole, but also realize the self-cleaning of the overflow.

Description

Technical Field

[0001] The invention relates to the field of gas stoves, in particular to a burner fire cover. Background Art

[0002] In order to prevent flame separation and ensure stable combustion, existing gas burners are generally provided with flame stabilizing holes. For example, the Chinese utility model patent with patent number ZL200920112857.7 (authorization announcement number CN201377835Y) discloses a gas stove outer ring fire cover, an ignition groove, a fire cover gas channel and an outer ring fire hole, wherein the fire cover gas channel is located in the fire cover, the outer ring fire hole is opened on the outer side of the fire cover, and the ignition groove is located on the upper surface of the fire cover. It is characterized in that: the outer side of the fire cover is a slope surface, and the fire cover is also provided with an inner ring fire hole and a flame stabilizing hole, the inner ring fire hole is located in the inner circle of the fire cover, and the inner ring fire hole is connected with the fire cover gas channel, the flame stabilizing hole is opened on the outer side of the fire cover, and the flame stabilizing hole is connected with the fire cover gas channel, the flame stabilizing hole is located below the outer ring fire hole, and the flame stabilizing hole and the outer ring fire hole are arranged alternately.

[0003] As can be seen from the above, the flame stabilizing holes on the existing burner fire cover are completely exposed to the outside. In this way, when the overflow liquid drips onto the fire cover, the liquid will flow into the flame stabilizing holes along the outer wall of the fire cover. Since the aperture of the flame stabilizing holes is generally small, they are very easy to be blocked, resulting in the main fire hole being separated from the flame, and stable combustion cannot be guaranteed. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a burner fire cover which can effectively prevent liquid overflow in view of the prior art.

[0005] The second technical problem to be solved by the present invention is to provide a burner fire cover with good flame stabilization effect in view of the prior art.

[0006] The third technical problem to be solved by the present invention is to provide a self-cleaning burner fire cover in view of the prior art.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a burner fire cover, comprising an annular fire cover body, the fire cover body comprising an annular top wall and inner and outer annular walls formed by the inner and outer edges of the top wall respectively extending vertically or obliquely downward, the outer annular wall is circumferentially provided with fire outlet holes and flame stabilizing holes, and is characterized in that the channel of the flame stabilizing hole extends obliquely upward from the inside to the outside along the outer annular wall, the fire outlet hole is arranged below the flame stabilizing hole, and the outer peripheral wall at the upper end of the fire cover body extends outwardly along the circumferential direction to form an annular flame stabilizing eaves, which can block the above-mentioned flame stabilizing hole from the horizontal direction, and the main flame in the main fire hole is lower than the flame stabilizing eaves and can at least burn outward along the lowest point of the flame stabilizing eaves, and the gap between the flame stabilizing eaves and the outer annular wall forms a flame stabilizing groove.

[0008] Preferably, the flame-stabilizing eaves is formed by the outer edge of the top wall extending radially outward to form a first annular wall, and the free end of the first annular wall extending vertically or obliquely downward to form a second annular wall. The flame-stabilizing eaves is directly formed radially outward from the outer edge of the top wall, so that the overflow to the fire cover can be directly guided, so that the flame-stabilizing eaves can have a better anti-overflow effect.

[0009] Furthermore, preferably, the top surface of the flame stabilizing eaves is inclined downward from the inside to the outside to form a diversion slope, which can prevent the liquid from adhering to the wall and flowing toward the flame stabilizing hole and the main fire hole, and can accelerate the liquid to flow downward along the diversion slope, thereby improving the anti-overflow effect.

[0010] Furthermore, preferably, the angle between the diversion slope and the horizontal plane is 15° to 35°, so as to achieve a better diversion effect and further improve the anti-overflow effect.

[0011] Preferably, the outer side of the flame-stabilizing eaves is inclined inward from top to bottom to form a fire-avoiding slope; the angle between the main fire hole and the horizontal plane is α, and the angle β between the fire-avoiding slope and the horizontal plane should be greater than α+30°. This can not only ensure the normal combustion of the flame of the main fire hole, but also avoid the heat loss caused by the flame of the main fire hole burning the flame-stabilizing eaves.

[0012] Preferably, the lower edge of the flame stabilizing eaves is lower than the lower edge of the flame stabilizing hole, so as to better prevent overflow from entering the flame stabilizing hole.

[0013] Preferably, the channel of the flame stabilizing hole extends from the inside to the outside to the bottom surface of the first annular wall to form a first pressure diffusion cavity. The first pressure diffusion cavity can reduce the flow rate of the airflow flowing out of the flame stabilizing hole, thereby enhancing the stability of the flame combustion in the flame stabilizing hole and thus enhancing its flame stabilizing effect.

[0014] Preferably, the inner side of the flame stabilizing baffle is provided with baffle walls that can laterally divide the inner cavity of the flame stabilizing groove, and the gaps between adjacent baffle walls form a second pressure diffusion cavity, and each second pressure diffusion cavity corresponds to the flame stabilizing hole one by one. By providing the second pressure diffusion cavity, the airflow flowing out of the flame stabilizing hole can be expanded and decelerated, thereby further enhancing its flame stabilizing effect.

[0015] Preferably, each of the baffles deviates from the diameter direction of the circle where it is located, and the deviation direction and deviation angle of each baffle are the same. Thus, the airflow flowing out of the flame stabilizing hole can have a rotating characteristic, and the airflow can be rotated downward as a whole to burn, thereby improving the combustion intensity and stability of the flame stabilizing fire through rotating combustion, thereby further enhancing the flame stabilizing effect of the main fire hole flame.

[0016] Preferably, the flame stabilizing hole and the fire outlet hole are arranged at intervals, so that the flame stabilizing fire can better heat the root of the fire outlet hole, thereby improving the flame stabilizing effect.

[0017] Compared with the prior art, the advantages of the present invention are: a flame-stabilizing eave is provided on the fire cover of the present invention, and the flame-stabilizing eave is surrounded by the outer ring wall to form a flame-stabilizing groove, and the flame-stabilizing eave can block the above-mentioned flame-stabilizing hole from the horizontal direction, so as to prevent the overflow dripping onto the fire cover from flowing into the flame-stabilizing hole, and the airflow in the flame-stabilizing hole will collide with the groove wall of the flame-stabilizing groove (i.e., the inner wall of the flame-stabilizing eave) after flowing out to the flame-stabilizing groove, so as to reduce its speed, make the flame stabilizing more stable, and thus achieve better flame stabilization effect, and because the fire outlet is arranged below the flame-stabilizing hole, it can effectively heat the root of the main fire hole, thereby further strengthening the flame stabilization effect on the main fire hole. In addition, the main flame in the main fire hole is lower than the flame-stabilizing eave and can at least burn outward along the lowest point of the flame-stabilizing eave, so the main flame in the main fire hole can heat the overflow flowing along the top wall to the flame-stabilizing eave, which can not only prevent the liquid from entering the main fire hole, but also realize self-cleaning of the overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the burner fire cover in Example 1 of the present invention;

[0019] Figure 2 A top view of a burner fire cover in Example 1 of the present invention;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure in another direction;

[0021] Figure 4 for Figure 3 The enlarged view of part I;

[0022] Figure 5 for Figure 2 A partial view of the cross-sectional view along the AA direction;

[0023] Figure 6 for Figure 2 A partial view of the cross-sectional view along the BB direction;

[0024] Figure 7 It is a partial diagram of the structural schematic diagram of the burner fire cover in Example 2 of the present invention;

[0025] Figure 8 for Figure 7 A partial diagram of a structural schematic diagram in another direction;

[0026] Fig. 9 for Figure 7 Enlarged view of part II. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings.

[0028] Embodiment 1:

[0029] like Figures 1 to 6 As shown, a burner fire cover comprises an annular fire cover body 1, the fire cover body 1 comprises an annular top wall 2, inner and outer ring walls 3 and 4 respectively extending vertically downward from the inner and outer edges of the top wall 2, wherein the outer ring wall 4 is provided with fire outlet holes 6 and flame stabilizing holes 7 at intervals along the circumferential direction. In this embodiment, the burner fire cover is an outer ring fire cover, the channels of the fire outlet holes 6 and the flame stabilizing holes 7 both extend upward obliquely from the inside to the outside, and the channels of the fire outlet holes 6 and the channels of the flame stabilizing holes 7 are arranged parallel to each other.

[0030] Furthermore, the flame stabilizing hole 7 is located above the fire outlet hole 6, and the flame stabilizing hole 7 is spaced apart from the fire outlet hole 6, so that the flame stabilizing fire at the flame stabilizing hole 7 can better heat the root of the fire outlet hole 6, thereby improving the flame stabilizing effect.

[0031] Furthermore, the outer edge of the top wall 2 extends radially outward to form a first annular wall 51, and the free end of the first annular wall 51 extends vertically downward to form a second annular wall 52. Thus, the first annular wall 51 and the second annular wall 52 are combined to form a flame-stabilizing eave 5 with an inverted L-shaped cross section, and the gap between the flame-stabilizing eave 5 and the outer annular wall 4 forms a flame-stabilizing groove 50. At the same time, the flame-stabilizing eave 5 can block the flame-stabilizing hole 7 from the horizontal direction, thereby preventing the overflow dripping onto the fire cover from flowing into the flame-stabilizing hole 7, and then preventing the overflow from clogging the flame-stabilizing hole 7. The first annular wall 51 and the second annular wall 52 can both be open-loop or closed-loop, and accordingly, the flame-stabilizing eave 5 can also be open-loop or closed-loop. In this embodiment, a radially extending ignition groove 11 is provided on one side of the fire cover body 1, so that the flame-stabilizing eave 5 is open-loop.

[0032] In addition, during operation, the flame-stabilizing airflow in the flame-stabilizing hole 7 is first introduced obliquely upward into the flame-stabilizing groove 50, and then flows downward after colliding with the groove wall of the flame-stabilizing groove 50. The collision of the flame-stabilizing airflow with the groove wall is conducive to the expansion and spreading of the flame-stabilizing airflow in the flame-stabilizing groove 50, forming a flame-stabilizing ring in the flame-stabilizing groove 50, and then flows out horizontally. After the flame-stabilizing airflow collides and turns back downward and outward, the kinetic energy of the flame-stabilizing airflow is greatly reduced, thereby greatly reducing its flow rate, and thus significantly improving its flame-stabilizing effect. In this embodiment, preferably, the lower edge of the flame-stabilizing eaves 5 is lower than the lower edge of the flame-stabilizing hole 7, so as to better prevent overflow from entering the flame-stabilizing hole 7. In this embodiment, in order to achieve a better flame-stabilizing effect, the width D of the above-mentioned flame-stabilizing groove 50 is 1 to 2 mm.

[0033] In order to prevent the flame-stabilizing eaves 5 from affecting the main flame in the main fire hole 6, the main flame in the main fire hole 6 is lower than the flame-stabilizing eaves 5 and can at least burn outward along the lowest point of the flame-stabilizing eaves 5, so as to avoid the main flame burning the flame-stabilizing eaves 5 and causing heat loss. In addition, through the above design, the main flame can heat the overflow liquid flowing down the top wall 2 to the flame-stabilizing eaves 5, which can not only prevent the liquid from entering the main fire hole 6, but also realize the self-cleaning of the overflow liquid. In this embodiment, the distance between the bottom edge of the flame-stabilizing eaves 5 and the upper edge of the main fire hole 6 is greater than or equal to 3 mm.

[0034] In addition, in this embodiment, the top surface of the flame-stabilizing eaves 5 is inclined downward from the inside to the outside to form a diversion slope 511, so as to prevent the liquid from adhering to the wall and flowing toward the flame-stabilizing hole 7 and the main fire hole 6, and to accelerate the liquid to flow downward along the diversion slope 511, thereby improving the anti-overflow effect. Preferably, the angle γ between the diversion slope 511 and the horizontal plane is 15° to 35°, so as to play a better diversion role, and further improve the anti-overflow effect. The outer side surface of the flame-stabilizing eaves 5 is inclined inward from top to bottom to form a fire-avoiding slope 521; the angle between the channel of the main fire hole 6 and the horizontal plane is α, and the angle β between the fire-avoiding slope 521 and the horizontal plane should be greater than α+30°, so as to not only ensure the normal combustion of the flame of the main fire hole 6, but also avoid the heat loss caused by the flame of the main fire hole 6 burning the flame-stabilizing eaves 5. In this embodiment, the size of the above-mentioned angle β is 50° to 80°.

[0035] In this embodiment, the channel of the flame stabilizing hole 7 is formed by punching holes from the inner side of the outer annular wall 4 outward, and the channel of the flame stabilizing hole 7 extends to the bottom surface of the first annular wall 51 to form a first pressure diffusion cavity 71. The first pressure diffusion cavity 71 can reduce the flow rate of the airflow flowing out of the flame stabilizing hole 7, thereby enhancing the stability of the flame combustion in the flame stabilizing hole 7, thereby enhancing its flame stabilizing effect.

[0036] Embodiment 2:

[0037] like Figures 7 to 9 As shown, different from Example 1, in this embodiment, the inner side of the flame stabilizing eaves 5 is provided with baffle walls 8 that can laterally separate the inner cavity of the flame stabilizing groove 50 at intervals along the circumferential direction, and the gaps between adjacent baffle walls 8 form second pressure diffusion cavities 9, and each second pressure diffusion cavity 9 corresponds to the flame stabilizing hole 7 one by one. By providing the second pressure diffusion cavity 9, the airflow flowing out of the flame stabilizing hole 7 can be expanded and decelerated, thereby further enhancing its flame stabilizing effect. In this embodiment, the baffle wall 8 is provided between the outer annular wall 4 and the flame stabilizing eaves 5, that is, one end of the baffle wall 8 is fixed to the outer annular wall 4, and the other end is fixed to the flame stabilizing eaves 5.

[0038] Furthermore, the baffles 8 are all deviated from the diameter direction of the circle where they are located, and the deviation direction and deviation angle of each baffle 8 are the same. Thus, the airflow flowing out of the flame stabilizing hole 7 can have a rotating characteristic, and the airflow is rotated downward as a whole to burn, and the combustion intensity and stability of the flame stabilizing fire are improved through the rotating combustion, thereby further enhancing the flame stabilizing effect of the flame of the main fire hole 6.

Claims

1. A burner fire cover, comprising an annular fire cover body (1), the fire cover body (1) comprising an annular top wall (2) and inner and outer annular walls (3, 4) extending vertically or obliquely downward from the inner and outer edges of the top wall (2), the outer annular wall (4) being provided with fire outlet holes (6) and flame stabilizing holes (7) along the circumferential direction, characterized in that: The channel of the flame stabilizing hole (7) extends upwardly and obliquely from the inside to the outside along the outer annular wall (4); the fire outlet hole (6) is arranged below the flame stabilizing hole (7); the outer peripheral wall of the upper end of the fire cover body (1) extends outwardly along the circumferential direction to form an annular flame stabilizing eaves (5); the flame stabilizing eaves (5) can shield the flame stabilizing hole (7) from the horizontal direction; the main flame in the main fire hole (6) is lower than the flame stabilizing eaves (5) and can at least burn outward along the lowest point of the flame stabilizing eaves (5); and the gap between the flame stabilizing eaves (5) and the outer annular wall (4) forms a flame stabilizing groove (50); The flame-stabilizing eaves (5) extend radially outward from the outer edge of the top wall (2) to form a first annular wall (51), and the free end of the first annular wall (51) extends vertically or obliquely downward to form a second annular wall (52); The flame stabilizing hole (7) extends from the inside to the outside to the bottom surface of the first annular wall (51) to form a first pressure diffusion cavity (71); The outer side surface of the flame-stabilizing eaves (5) is inclined inward from top to bottom to form a fire-avoiding slope (521); The angle between the main fire hole (6) and the horizontal plane is α, and the angle between the fire avoidance slope (521) and the horizontal plane is β greater than α+30°; The inner side of the flame-stabilizing baffle (5) is provided with baffle walls (8) which can laterally divide the inner cavity of the flame-stabilizing groove (50) at intervals along the circumferential direction, and the gaps between adjacent baffle walls (8) form second pressure diffusion cavities (9), and each second pressure diffusion cavity (9) corresponds to a flame-stabilizing hole (7) one by one. Each of the baffle walls (8) deviates from the diameter direction of the circle in which it is located, and the deviation direction and deviation angle of each baffle wall (8) are the same.

2. The burner cap according to claim 1, characterized in that: The top surface of the flame-stabilizing eaves (5) is inclined downward from the inside to the outside to form a flow guide slope (511).

3. The burner cap according to claim 2, characterized in that: The included angle between the diversion slope (511) and the horizontal plane is 15° to 35°.

4. The burner cap according to claim 1, characterized in that: The lower edge of the flame stabilizing eaves (5) is lower than the lower edge of the flame stabilizing hole (7).

5. The burner fire cover according to any one of claims 1 to 4, characterized in that: The flame stabilizing hole (7) and the fire outlet hole (6) are arranged at intervals.

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