CN112013393B

CN112013393B - Fire cover for gas stove

Info

Publication number: CN112013393B
Application number: CN201910468054.3A
Authority: CN
Inventors: 程永超; 张帅; 郑军妹
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2022-01-14
Anticipated expiration: 2039-05-31
Also published as: CN112013393A

Abstract

The invention relates to a fire cover for a gas stove, which comprises a fire cover body and a fire transmission chamber, and is characterized in that: the fire transfer chamber includes the diapire and directly as the lateral wall of fire transfer chamber with outer annular wall part, and the lateral wall of fire transfer chamber has three: the first side wall and the second side wall are connected with the outer side wall and the inner side wall; the fire transfer chamber also comprises a lower fire transfer channel, a gas hole and an air hole, compared with the prior art, the invention has the advantages that the lower fire transfer channel of the fire transfer chamber is a hidden fire transfer channel which is hidden in the fire cover body and is relatively isolated from the gas mixing chamber, thus not only ensuring the flame combustion in the lower fire transfer channel, but also effectively preventing the soup from being blocked; in addition, the periphery of the inner side opening of the lower fire transfer channel is provided with the gas holes, so that on one hand, the gas quantity of the periphery of the inner side opening of the lower fire transfer channel can be increased, the success rate of fire transfer is improved, and on the other hand, the gas holes are also provided with the air holes around the gas holes, so that the gas holes are enabled to be ignited to play a role in igniting.

Description

Fire cover for gas stove

Technical Field

The invention relates to a household stove burner, in particular to a fire cover for a gas stove.

Background

At present, most of traditional burner fire covers sold in the market are milled through a groove, namely a fire ignition groove is milled through the top of the fire cover body, and the burner fire cover is easy to deform due to the fact that the fire cover body is disconnected at the fire ignition groove, so that the fire ignition effect is influenced. For example, a similar fire transfer structure is disclosed in the chinese patent invention "gas furnace head with fire transfer device and flameout protection function" with patent No. 201220464214.0 (publication No. CN202813375U), wherein an outer ring fire spraying ring is provided with a plurality of outer ring fire spraying holes, and the outer ring fire spraying holes are further provided with an outer ring fire transfer device, the outer ring fire transfer device is composed of a boss arranged on the inner side wall of the outer ring fire spraying ring, outer ring fire transfer holes and outer ring fire transfer grooves arranged on the boss and the outer ring fire spraying ring, the outer ring fire transfer holes are communicated with the outer ring fire transfer grooves, the outer ring fire transfer holes and the outer ring fire transfer grooves are communicated with one outer ring fire spraying hole, so as to realize rapid fire transfer; the fire transfer groove of the fire transfer structure is open, the fire transfer groove is linear, namely the fire transfer groove is exposed on the surface of the outer ring fire cover, the design of the design has a benefit that the secondary air in the fire transfer groove is sufficiently supplemented, the open fire transfer groove can ensure the supplement of the secondary air during the flame combustion in the fire transfer groove, the flame combustion and the fire transfer are facilitated, and the open fire transfer groove has the characteristic of quick fire transfer, but has two disadvantages, the first open fire transfer groove and the open fire transfer groove are easy to cause the blockage of the fire transfer groove, namely soup flowing from the bottom of a pan is easy to flow into the fire transfer groove, the fire transfer performance is influenced after the blockage, and the main reason for the blockage maintenance of the current fire transfer groove is also included; secondly, the open fire transmission groove has high requirements on the air door of the stove, and after the air door is opened to a large extent, too much air can cause too high air speed, so that flame is separated or flame is released during combustion. For this reason, further improvements in the fire transfer slots of burner fire covers are desired.

Therefore, the existing burner fire cover also adopts a hidden fire transfer structure, for example, a Chinese utility model patent with patent number ZL2018206663176.9 (publication number CN208312375U) discloses a gas burner, which comprises a gas mixing chamber, an outer ring fire cover with an annular fire cover body and an inner ring fire cover, wherein the top of the gas mixing chamber is sequentially provided with an inner ring gas mixing chamber and an outer ring gas mixing chamber which are opened upwards from inside to outside, the inner ring fire cover and the outer ring fire cover are respectively covered on the inner ring gas mixing chamber and the outer ring gas mixing chamber, a secondary air loop is arranged between the inner ring gas mixing chamber and the outer ring gas mixing chamber, the side wall of the gas mixing chamber is provided with a secondary air supplement hole communicated with the secondary air loop, the fire cover body is radially provided with a fire transfer channel, and the fire transfer channel is communicated with the corresponding secondary air supplement hole. Supplementary hole through the secondary air supplements the air to passing the fire passageway, thereby promote passing the high-efficient burning of fire flame in the passageway of passing a fire, and then promote and pass fire speed, though this pass fire passageway has solved the air problem of hidden passageway of passing a fire, and do not solve the gas problem in the hidden passageway of passing a fire, because the air supply pressure in different areas is different, pressure is low excessively, then cause hidden passing fire not to have the gas in the passageway easily, and pressure is too fast, then cause the gas fast and the air-free in the hidden passageway of passing a fire easily, the phenomenon that all can cause the point to not catch fire produces. Therefore, further improvements in the flame transfer structure of the existing burners are needed.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a fire cover for a gas stove, which can adapt to different gas source pressures, i.e. can ensure fire transmission performance even under the condition of too low gas source pressure, in view of the above-mentioned current state of the art.

The second technical problem to be solved by the present invention is to provide a fire cover for a gas stove, which can reduce the fire transmission distance in view of the above-mentioned prior art.

The third technical problem to be solved by the present invention is to provide a fire cover for a gas stove, which can improve the fire structure strength of the fire cover and reduce the probability of blocking the fire.

A fourth technical problem to be solved by the present invention is to provide a fire cover for a gas stove, which has an enhanced applicability to the opening degree of an air door, that is, can ensure a fire-transmitting performance even under a condition that the opening degree of the air door is large, in view of the above-mentioned current state of the art.

In order to solve the first technical problem, the technical scheme adopted by the invention is as follows: this a fire lid for gas-cooker, including the fire lid body, be formed with the gas mixing chamber between the cyclic annular roof of this fire lid body and the inner ring wall, the outer rampart that extend downwards from the inboard edge of this cyclic annular roof, the outside edge is vertical or slope, the outer rampart, radially outwards extend towards the center of fire lid body from inner ring wall to outer rampart at the cyclic annular roof upper surface of fire lid body and be formed with and pass fire room, its characterized in that:

the fire transfer chamber comprises a bottom wall and an outer side wall which directly uses the outer ring wall part as the fire transfer chamber, and the number of the side walls of the fire transfer chamber is three: the first side wall and the second side wall are connected with the outer side wall and the inner side wall;

the fire transfer chamber also comprises a lower fire transfer channel, an inner side opening of the lower fire transfer channel is positioned on the inner side wall, an outer side opening of the lower fire transfer channel is positioned on the outer side wall, and the bottom wall of the fire transfer chamber is provided with at least one air inlet hole communicated with the lower fire transfer channel and the air mixing cavity; and

the gas hole is provided with at least one gas hole, is formed in the inner side wall of the fire transfer chamber, is communicated with the gas mixing cavity and is positioned on the periphery of the inner side opening of the lower fire transfer channel; and

and the air holes are positioned between the adjacent gas holes and comprise gas inlet ends and gas outlet ends, the gas inlet ends are positioned on the first side wall and/or the second side wall of the fire transfer chamber, and the gas outlet ends are positioned on the inner side wall of the fire transfer chamber.

In order to increase the gas inlet mode of gas flowing into the lower fire transfer channel, an inverted V-shaped notch which penetrates through the lower fire transfer channel and is formed in the bottom wall of the fire transfer chamber in a concave mode from bottom to top is formed in the bottom wall of the fire transfer chamber. And the opening caliber of the notch is larger than that of the air inlet, so that the possibility that the fuel gas enters the lower fire transfer channel can be increased, and the phenomenon that the fuel gas cannot flow into the lower fire transfer channel due to too low fuel gas pressure is avoided.

In order to solve the second technical problem, it is preferable that the outer side wall of the fire transfer chamber is provided with auxiliary fire transfer holes in parallel at the outer side opening of the lower fire transfer passage, the notch divides the bottom wall of the fire transfer chamber into a first bottom wall corresponding to the inner side opening of the lower fire transfer passage and a second bottom wall corresponding to the outer side opening of the lower fire transfer passage, and the gas inlet end of the auxiliary fire transfer hole is located in the second bottom wall at a position adjacent to the notch. This supplementary biography fire hole give vent to anger the end and set up the play fire hole on outer rampart and be closer to, can shorten and pass the fire distance in order to realize passing fire fast, and the income gas end of supplementary biography fire hole is located the part of neighbouring notch in the second diapire, then compares the biography fire distance of passing fire the passageway under shorter, then can assist the realization to accelerate the speed of passing fire the passageway under.

In order to accelerate the gas to enter the lower fire transfer channel from the gas mixing cavity, the wall part of the first bottom wall adjacent to the notch is gradually inclined outwards from bottom to top. Because the passageway of passing a fire down is hidden passageway of passing a fire, can open the air door big like this for the primary air volume increase of passageway of passing a fire under the entering speed grow simultaneously, thereby can be more with the overfire air entrainment entering passageway of passing a fire down, guarantee the flame burning in the passageway of passing a fire down promptly, can effectively prevent the jam of hot water again, the suitability reinforcing to the air door aperture simultaneously, also can guarantee to pass a fire performance under the great condition of air door aperture promptly.

In order to avoid the interruption of the fire from the inside to the outside, it is preferable that the air intake holes are located on the second bottom wall, and the air intake holes are gradually inclined outward from the bottom to the top. The air inlet is close to the outer opening of the lower fire transfer channel, so that the mixing uniformity of gas and air in the lower fire transfer channel can be improved, and the flame stabilizing performance is improved.

In order to solve the third technical problem, preferably, the fire transfer chamber further includes a top wall and an upper fire transfer passage located on the lower fire transfer passage, the upper fire transfer passage has a top opening formed in the top wall of the fire transfer chamber, an outer side opening of the upper fire transfer passage is formed in the outer side wall, and an inner side opening of the upper fire transfer passage is formed in the inner side wall. The upper fire transfer channel is an open fire transfer channel, secondary air in the upper fire transfer channel is sufficiently supplemented, and the open upper fire transfer channel can ensure the supplement of the secondary air during the combustion of flame in the upper fire transfer channel so as to solve the problem that the lower fire transfer channel is insufficient as air in a hidden fire transfer structure.

In order to supply the fuel gas in the upper fire transfer channel, at least one first through hole communicated with the gas mixing cavity is formed in the upper fire transfer channel at the other part except the top opening.

To solve the fourth technical problem, it is preferable that at least one of two opposite inner walls of the top opening of the upper fire transfer passage has a rib protruding toward the other inner wall and extending in a radial direction, and the opening of the first through hole faces the rib. At least one through hole communicated with the gas mixing cavity is arranged in the upper fire transfer channel except the top opening communicated with the outside, the central line of each through hole is intersected with the convex rib, thereby the gas flowing out from each through hole can be opposite to the convex rib, thereby improving the mixing uniformity of the gas and the air in the upper fire transfer channel, reducing the flow velocity and improving the flame stabilizing performance, thereby solving the problem that the upper fire channel is open and communicated with the outside, which is easy to generate fire transmission blocking phenomenon caused by too high gas speed, plays a good role in stabilizing flame at the ignition slot, can ensure the supply of secondary air of an internal up-transfer fire channel, the flame combustion in the upper fire transfer channel is ensured, meanwhile, the applicability to the opening degree of the air door is enhanced, the fire transfer performance can be ensured under the condition that the opening degree of the air door is larger, and finally, the convex ribs also play a role in preventing liquid overflowing.

In order to ensure that the upper fire transfer channel has sufficient gas quantity, the other parts of the upper fire transfer channel, except the top opening, are also provided with second through holes which are arranged side by side with the first through holes and communicated with the gas mixing cavity.

Preferably, the second through hole has a large lower end and a small upper end. The secondary air of the open type upper fire transfer channel flows downwards from the top opening of the top wall of the fire transfer chamber into the upper fire transfer channel, so that the secondary air quantity at the upper end of the upper fire transfer channel is larger than the secondary air quantity at the lower end of the upper fire transfer channel.

Compared with the prior art, the invention has the advantages that the lower fire transfer channel of the fire transfer chamber is a hidden fire transfer channel which is hidden in the fire cover body and is relatively isolated from the air mixing chamber, so that the air door can be opened to be large, the primary air quantity entering the air inlet and the lower fire transfer channel is increased, and the speed is increased, so that more secondary air can be sucked into the lower fire transfer channel of the fire transfer chamber, meanwhile, the lower fire transfer channel of the fire transfer chamber is hidden in the fire cover body, liquid overflowing can be effectively prevented from entering the lower fire transfer channel, the fire transfer of the lower fire transfer channel hidden in the fire cover body can be ensured, the flame combustion in the lower fire transfer channel can be ensured, and the blockage of soup can be effectively prevented; in addition, the periphery of the inner side opening of the lower fire transfer channel is provided with a gas hole, on one hand, the gas quantity of the periphery of the inner side opening of the lower fire transfer channel can be increased, the success rate of fire transfer is improved, on the other hand, the aperture of the gas hole is smaller than that of the lower fire transfer channel, even under the low-pressure condition, the gas hole is directly communicated with the gas mixing cavity of the fire cover body, the probability that gas enters the gas hole is also obviously larger than that of the lower fire transfer channel, the periphery of the gas hole is also provided with an air hole which can supply secondary air from the outside to the gas hole, so that the gas hole is enabled to be ignited, therefore, the inner side opening of the lower fire transfer channel can be ignited, and the phenomenon that ignition is not caused due to the over-low pressure of the gas is avoided.

Drawings

FIG. 1 is a schematic view of an angle of a fire cover according to an embodiment of the present invention;

FIG. 2 is a schematic view of another angle of the fire cover according to the embodiment of the present invention;

FIG. 3 is a cross-sectional view at an angle in FIG. 1;

FIG. 4 is a cross-sectional view at another angle in FIG. 1;

FIG. 5 is a cross-sectional view at yet another angle in FIG. 1;

FIG. 6 is a cross-sectional view at an angle of FIG. 2;

fig. 7 is a cross-sectional view at another angle of fig. 2.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in FIGS. 1 to 7, the preferred embodiment of the present invention is shown. The fire cover for the gas stove in the embodiment comprises a fire cover body 1, a gas mixing cavity 14 is formed between an annular top wall 11 of the fire cover body 1 and an inner annular wall 12 and an outer annular wall 13 which vertically or obliquely extend downwards from the inner edge and the outer edge of the annular top wall 11, a fire transfer chamber 2 is formed by radially extending outwards from the inner annular wall 12 to the outer annular wall 13 towards the center of the fire cover body 1 on the upper surface of the annular top wall 11 of the fire cover body 1, the fire transfer chamber 2 comprises a bottom wall 21 and an outer annular wall 13 part which is directly used as an outer side wall 22 of the fire transfer chamber 2, and the number of the side walls of the fire transfer chamber 2 is three: an inner side wall 23 opposite to the outer side wall 22, and first and

second side walls

24 and 25 connecting the outer side wall 22 and the inner side wall 23; the fire transfer chamber 2 further comprises a lower fire transfer channel 26, an inner side opening 261 of the lower fire transfer channel 26 is positioned on the inner side wall 23, an outer side opening 262 of the lower fire transfer channel 26 is positioned on the outer side wall 22, and the bottom wall 21 of the fire transfer chamber 2 is provided with at least one air inlet 211 communicated with the lower fire transfer channel 26 and the air mixing cavity 14; and a gas hole 3, the gas hole 3 having at least one, opening on the inner side wall 23 of the fire transfer chamber 2, communicating with the gas mixing chamber 14, and being located at the periphery of the inner side opening 261 of the lower fire transfer passage 26; and air holes 4, located between adjacent gas holes 3, including an air inlet 41 and an air outlet 42, where the air inlet 41 is located on the first side wall 24 and/or the second side wall 25 of the fire transfer chamber 2, the air outlet 42 is located on the inner side wall 23 of the fire transfer chamber 2, and the periphery of the inner side opening 261 of the lower fire transfer passage 26 is provided with the gas holes 3, so that on one hand, the gas quantity at the periphery of the inner side opening 261 of the lower fire transfer passage 26 can be increased, and the success rate of fire transfer is improved, and on the other hand, because the aperture of the gas holes 3 is smaller than that of the lower fire transfer passage 26, even under low pressure, the gas holes 3 are directly communicated with the gas mixing chamber 14 of the fire cover body 1, so that the probability of gas entering the gas holes 3 is also obviously larger than that of the lower fire transfer passage 26, and the periphery of the gas holes 3 is also provided with the gas holes 4 capable of supplementing secondary air from the outside to the gas holes 3, so as to promote the gas holes 3 to be ignited, therefore, the internal opening 261 of the downward fire transfer channel 26 can be ignited, and the phenomenon that ignition is not caused due to too low pressure of fuel gas is avoided. In addition, pass the lower fire passageway 26 of room 2 and for hiding the hidden passageway of passing fire that covers body 1 and keep apart with mixing the air chamber relatively, can open the air door big like this, make the primary air volume that gets into inlet port 211 and pass the fire passageway 26 down increase speed grow simultaneously, thereby can more with the secondary air entrainment get into pass in the lower fire passageway 26 of room 2 of passing fire, and simultaneously, pass the lower fire passageway 26 of room 2 of passing fire and hide in the room body 1 of fire, can effectively avoid the overflow to get into in passing the fire passageway 26 down, can guarantee to hide the passing fire of passing the fire passageway 26 under in the room body 1 of fire, guarantee the flame burning in passing the fire passageway 26 under promptly, can effectively prevent the jam of hot water again.

In order to increase the gas intake mode of the lower flame transfer passage 26, the bottom wall 21 of the flame transfer chamber 2 is recessed from bottom to top with an inverted V-shaped notch 212 penetrating the lower flame transfer passage 26, and the opening diameter of the notch 212 is larger than that of the gas inlet 211, so that the possibility of the gas entering the lower flame transfer passage 26 can be increased, and the phenomenon that the gas cannot flow into the lower flame transfer passage 26 due to too low gas pressure can be avoided. The outer side wall 22 of the fire transfer chamber 2 is provided with auxiliary fire transfer holes 5 in parallel at an outer opening 262 of the lower fire transfer channel 26, the recess 212 divides the bottom wall 21 of the fire transfer chamber 2 into a first bottom wall 213 corresponding to the inner opening 261 of the lower fire transfer channel 26 and a second bottom wall 214 corresponding to the outer opening 262 of the lower fire transfer channel 26, the gas inlet end 51 of the auxiliary fire transfer hole 5 is located in the second bottom wall 214 near the recess 212, the gas outlet end of the auxiliary fire transfer hole 5 is closer to the gas outlet hole 131 formed in the outer annular wall 13, the fire transfer distance can be shortened to achieve rapid fire transfer, and the gas inlet end 51 of the auxiliary fire transfer hole 5 is located in the second bottom wall 214 near the recess 212, so that the fire transfer distance is shorter than that of the lower fire transfer channel 26, and the speed of the lower fire transfer channel 26 can be increased in an auxiliary manner. In order to accelerate the gas entering the lower fire transfer passage 26 from the gas mixing chamber 14, the wall portion 2131 of the first bottom wall 213 adjacent to the notch 212 is gradually inclined outwards from bottom to top, and in order to avoid the blocking of the fire transfer from inside to outside, the gas inlet hole 211 is positioned on the second bottom wall 214, and the gas inlet hole 211 is gradually inclined outwards from bottom to top, and the gas inlet hole 211 is close to the outer opening 262 of the lower fire transfer passage 26, so that the mixing uniformity of the gas and the air in the lower fire transfer passage 26 can be improved, and the flame stabilizing performance is improved.

In order to compensate for the insufficient air in the concealed fire transfer structure of the lower fire transfer channel 26, the fire transfer chamber 2 further includes a top wall 20 and an upper fire transfer channel 27 located above the lower fire transfer channel 26, the upper fire transfer channel 27 has a top opening 271 opened on the top wall 20 of the fire transfer chamber 2, an outer port 272 of the upper fire transfer channel 27 is opened on the outer side wall 22, an inner port 273 of the upper fire transfer channel 27 is opened on the inner side wall 23, the upper fire transfer channel 27 is an open fire transfer channel, the supply of secondary air in the upper fire transfer channel 27 is sufficient, and the open upper fire transfer channel 27 can ensure the supply of secondary air during the combustion of flame in the upper fire transfer channel 27. In order to supply the gas in the upper fire transfer channel 27, at least one first through hole 274 communicated with the gas mixing cavity 14 is formed in the other part of the upper fire transfer channel 27 except the top opening 271, wherein at least one of the two opposite inner walls of the top opening 271 of the upper fire transfer channel 27 is provided with a convex rib 2711 which protrudes towards the other inner wall and extends along the radial direction, the opening of the first through hole 274 faces the convex rib 2711, at least one through hole communicated with the gas mixing cavity 14 is formed in the other part of the top opening 271 communicated with the outside in the upper fire transfer channel 27, and the center line of each through hole is intersected with the convex rib 2711, so that the gas flowing out from each through hole can be opposite to the convex rib 2711, thereby improving the mixing uniformity of the gas and the air in the upper fire transfer channel 27, simultaneously reducing the flow rate and improving the flame stability, thereby solving the problem that the fire transfer blocking phenomenon caused by the excessively high gas speed is easily generated because the upper fire transfer channel 27 is an open type communicated with the outside The flame of the ignition groove has a good flame stabilizing effect, secondary air supply of the internal uploading ignition channel 27 can be guaranteed, namely flame combustion in the uploading ignition channel 27 is guaranteed, meanwhile, the applicability of the opening degree of the air door is enhanced, namely, the ignition performance can be guaranteed under the condition that the opening degree of the air door is large, preferably, the convex ribs 2711 are two and are respectively positioned on two opposite inner walls of the top opening 271 of the uploading ignition channel 27, and the convex ribs 2711 also play a role in preventing overflowing. In addition, in order to ensure that the upper fire transfer channel 27 has sufficient gas quantity, the upper fire transfer channel 27 is provided with second through holes 275 which are arranged side by side with the first through holes 274 and communicated with the gas mixing cavity 14 at other positions than the top opening 271, and the lower end of the hole diameter of each second through hole 275 is large, and the upper end is small. Since the lower end of the aperture of the second through hole 275 is large, the mixing degree of the gas and the secondary air is greater at the lower end than at the upper end, and since the secondary air of the open type up-fire passage 27 flows downward from the top opening 271 of the ceiling wall 20 of the fire chamber 2 into the up-fire passage 27, the amount of the secondary air at the upper end of the up-fire passage 27 is greater than the amount of the secondary air at the lower end of the up-fire passage 27, and thus, the lower end of the aperture of the second through hole 275 is large and the upper end is small, so that the mixing degree of the gas and the secondary air at the lower end of the up-fire passage 27 can be increased.

As described above, the path of the primary air, the gas, the mixed gas after mixing and the secondary air in the fire transfer chamber 2 is divided into three paths, the first path is to transfer fire in the upper fire transfer channel 27 of the fire transfer chamber 2, specifically, the gas and the primary air enter the upper fire transfer channel 27 from the gas mixing chamber 14 through the first through hole 274, and flow out after being collided with the convex rib 2711 after being sucked into the secondary air through the top opening 271 of the upper fire transfer channel 27, so that the air flow velocity of the mixed gas when flowing out from the upper fire transfer channel 27 is effectively reduced, the gas at the upper fire transfer channel 27 is not easy to leave flame during combustion, and the ignition of the burner is more stable; and a second path: which is a lower fire transfer channel 26 of the fire transfer chamber 2, the gas and the primary air enter the lower fire transfer channel 26 through an air inlet hole 211 and an inverted V-shaped notch 212, in addition, the first side wall 24 and the second side wall 25 of the fire transfer chamber 2 are both provided with the gas holes 3, so that on one hand, the gas quantity at the periphery of the inner side opening 261 of the lower fire transfer channel 26 can be increased, the success rate of fire transfer is improved, on the other hand, because the pore diameter of the gas holes 3 is smaller than that of the lower fire transfer channel 26, even under low pressure, the gas holes 3 are directly communicated with the gas mixing chamber 14 of the fire lid body 1, the probability of gas and primary air entering the gas hole 3 is also significantly greater than that of the lower fire channel 26, and the gas hole 3 is further provided with additional air holes 4 around it for supplying secondary air from the outside to the gas hole 3, so as to promote the gas hole 3 to be ignited, thereby playing a role of igniting the inner side opening 261 of the downward fire transmission channel 26; and a third path: for the intersection of the lower fire transfer channel 26 and the auxiliary fire transfer holes 5 to transfer fire, the gas inlet 51 of the auxiliary fire transfer holes 5 is located at the portion of the second bottom wall 214 adjacent to the notch 212, the gas outlet of the auxiliary fire transfer holes 5 is closer to the fire outlet provided on the outer annular wall 13, the fire transfer distance can be shortened to achieve rapid fire transfer, and meanwhile, the gas inlet 51 of the auxiliary fire transfer holes 5 is located at the portion of the second bottom wall 214 adjacent to the notch 212, so that the fire transfer distance is shorter than that of the lower fire transfer channel 26, and the fire transfer speed of the lower fire transfer channel 26 can be increased in an auxiliary manner.

Claims

1. The utility model provides a fire lid for gas-cooker, including fire lid body (1), be formed with air mixing chamber (14) between cyclic annular roof (11) of this fire lid body (1) and from the inboard edge of this cyclic annular roof (11), the vertical or inclined downwardly extending's of outside edge inner ring wall (12), outer ring wall (13), the cyclic annular roof (11) upper surface of fire lid body (1) is formed with and passes fire room (2) towards the radial outside extension of the center of fire lid body (1) from inner ring wall (12) to outer ring wall (13), its characterized in that:

the fire transfer chamber (2) comprises a bottom wall (21) and an outer side wall (22) which takes the outer ring wall (13) part as the fire transfer chamber (2), and the number of the side walls of the fire transfer chamber (2) is three: an inner side wall (23) opposite to the outer side wall (22), and a first side wall (24) and a second side wall (25) connecting the outer side wall (22) and the inner side wall (23);

the fire transfer chamber (2) further comprises a lower fire transfer channel (26), an inner side opening (261) of the lower fire transfer channel (26) is positioned on the inner side wall (23), an outer side opening (262) of the lower fire transfer channel (26) is positioned on the outer side wall (22), and at least one air inlet hole (211) communicated with the lower fire transfer channel (26) and the air mixing cavity (14) is formed in the bottom wall (21) of the fire transfer chamber (2); and

the gas hole (3) is provided with at least one gas hole, is formed in the inner side wall (23) of the fire transfer chamber (2), is communicated with the gas mixing cavity (14), and is positioned at the periphery of the inner side opening (261) of the lower fire transfer channel (26); and

air holes (4) are arranged between adjacent gas holes (3) and comprise gas inlet ends (41) and gas outlet ends (42), the gas inlet ends (41) are arranged on a first side wall (24) and/or a second side wall (25) of the fire transfer chamber (2), the gas outlet ends (42) are arranged on an inner side wall (23) of the fire transfer chamber (2), a notch (212) which penetrates through the lower fire transfer channel (26) and is in an inverted V shape is recessed from bottom to top in a bottom wall (21) of the fire transfer chamber (2), auxiliary fire transfer holes (5) are arranged in the outer side wall (22) of the fire transfer chamber (2) side by side in an outer side opening (262) of the lower fire transfer channel (26), and the notch (212) divides the bottom wall (21) of the fire transfer chamber (2) into a first bottom wall (213) corresponding to an inner side opening (261) of the lower fire transfer channel (26) and a second bottom wall (214) corresponding to an outer side opening (262) of the lower fire transfer channel (26), the gas inlet end (51) of the auxiliary fire transfer hole (5) is positioned in the part of the second bottom wall (214) adjacent to the notch (212).

2. Fire cover for gas cookers according to claim 1, characterized in that: the first bottom wall (213) is inclined gradually outward from bottom to top adjacent to the wall portion (2131) of the recess (212).

3. Fire cover for gas cookers according to claim 1 or 2, characterized in that: the air inlet holes (211) are located on the second bottom wall (214), and the air inlet holes (211) are gradually inclined outwards from bottom to top.

4. The fire cover for the gas range according to any one of claims 1 to 2, wherein: pass fire chamber (2) still including roof (20) and be located pass fire passageway (27) on passing fire passageway (26) down, pass fire passageway (27) have and set up pass top opening (271) of the roof (20) of fire chamber (2), the outside mouth (272) of passing fire passageway (27) are set up on lateral wall (22), the inboard mouth (273) of passing fire passageway (27) are set up on inside wall (23).

5. Fire cover for gas cookers according to claim 4, characterized in that: the other parts of the upper fire transfer channel (27) except the top opening (271) are provided with at least one first through hole (274) communicated with the air mixing cavity (14).

6. Fire cover for gas cookers according to claim 5, characterized in that: at least one of the two inner walls of the top opening 271 of the upper fire transfer passage 27 has a rib 2711 projecting toward the other inner wall and extending in the radial direction, and the first through hole 274 opens toward the rib 2711.

7. Fire cover for gas cookers according to claim 6, wherein: the other parts of the upper fire transfer channel (27) except the top opening (271) are also provided with second through holes (275) which are arranged side by side with the first through holes (274) and communicated with the air mixing cavity (14).

8. Fire cover for gas cookers according to claim 7, wherein: the lower end of the aperture of the second through hole (275) is large, and the upper end is small.