CN209944324U

CN209944324U - Fire cover for gas stove

Info

Publication number: CN209944324U
Application number: CN201822026267.4U
Authority: CN
Inventors: 刘晓刚; 王帅东; 柯情; 徐强; 郑军妹
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2018-12-03
Filing date: 2018-12-03
Publication date: 2020-01-14
Anticipated expiration: 2028-12-03

Abstract

The utility model relates to a fire lid for gas-cooker, including fire lid body, be formed with the muddy air chamber between the cyclic annular roof of this fire lid body and the interior rampart of the inboard edge, the outside edge vertical or slope downwardly extending from this cyclic annular roof, the outer rampart the cyclic annular roof of fire lid body radially is equipped with the channel of igniting, the channel of igniting opens there is the intercommunication the inlet port in muddy air chamber, its characterized in that: the inner ring wall is arranged below the opening at the inner side of the ignition channel and extends towards the center of the fire cover body to form an ignition platform with a U-shaped cross section, compared with the prior art, the utility model has the advantages that the gas of the ignition platform easily enters the explosion area of the gas due to sufficient air, forms a similar explosion effect after being ignited, and has high fire transfer speed; meanwhile, the convex edge of the ignition platform can effectively prevent the fuel gas of the ignition channel from being diluted by the external cold air, so that the fuel gas concentration of the ignition platform is ensured.

Description

Fire cover for gas stove

Technical Field

The utility model relates to a combustor of gas cooking utensils especially relates to a fire lid for gas-cooker.

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 an outer ring fire transfer device is further provided on the outer ring fire spraying right, the outer ring fire transfer device is composed of a fire striking table installed 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 fire striking table 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 fully supplied, the open fire transfer groove can ensure the supply of the secondary air when the flame in the fire transfer groove is burnt, the flame burning and the fire transfer are facilitated, and the open fire transfer groove has the characteristic of quick fire transfer, but has two bad parts, 1, the fire transfer groove is easy to block, namely the soup flowing from the bottom of a pot 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 the main reason for the blockage of the current fire transfer groove; 2. the open fire transfer groove has high requirements on the air door of the stove, and after the air door is opened to a large extent, the air flow speed is too high due to too much air at one time, so that fuel gas at the ignition port of the fire transfer groove is diluted to cause flame leaving or fire dropping during combustion, and therefore, the structural characteristic of the open fire transfer groove is poor in flame stabilizing property, so that the fire transfer performance of the open fire transfer groove is basically ensured by closing the air door to a small extent, but the closing of the air door is not beneficial to the combustion efficiency of the stove, and is not beneficial to the emission of smoke, and the performance of the stove is greatly influenced; and another kind of hidden fire transmission groove can be easily because the inside oxygen deficiency of fire transmission channel, can not realize stable burning, and the incessant backfire detonation phenomenon appears, causes the sense of fear for the user, for this reason, needs to make further improvement to the fire transmission groove of combustor fire lid.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that a fire lid for gas-cooker that can effectively guarantee the success rate of igniting is provided.

The utility model aims to solve the second technical problem that a fire lid for gas-cooker that can effectively guarantee to pass fire stably is provided, especially is fit for hidden biography fire.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: this fire lid for gas-cooker, including the fire lid body, be formed with the muddy air chamber between the cyclic annular roof of this fire lid body and the inner ring wall, the outer ring wall that extend downwards from the inboard edge, the outside edge of this cyclic annular roof are vertical or slope, the cyclic annular roof of fire lid body is equipped with the ignition passageway along radial, the ignition passageway is opened has the intercommunication the inlet port in muddy air chamber, its characterized in that: the inner ring wall is arranged below the opening at the inner side of the ignition channel and extends towards the center of the fire cover body to form an ignition platform with a U-shaped cross section.

The ignition channel can be an open ignition channel or a hidden ignition channel, and preferably, the ignition channel is an ignition hole. This ignition hole is hidden, and then speed is very fast from the air and the gas that the inlet port flows, and when air and the gas that flow from inboard opening flowed along the platform of igniting, can suitably slow down the speed of air and gas, simultaneously, has still increased the gas volume of platform of igniting to ensure the success rate of igniting.

In order to slow down the gas outlet speed of the fuel gas, the inner side opening of the ignition hole is provided with an inclined end face, the top end of the inclined end face is closer to the center of the fire cover body than the bottom end of the inclined end face, and an included angle alpha formed between a connecting line of the top end and the bottom end of the inclined end face and the ignition platform is an acute angle. The inclined end surface can increase the flow path of gas and air on one hand, and can prevent overflowing liquid from entering the ignition hole on the other hand.

Because the ignition channel is hidden ignition hole, on one hand, the air door can be opened to be large, so that the primary air quantity entering the air inlet hole is increased and the speed is increased, thereby more secondary air can be sucked into the ignition hole, after the gas, the primary air and the secondary air are mixed into mixed gas, the mixed gas can be directly collided with the top of the hole wall of the inner side opening of the ignition hole, the mixing uniformity of the gas and the air in the mixed gas is improved, the flow rate is reduced, the flame stabilizing performance is improved, if the angle is too large, the area of the collision between the mixed gas and the top of the inner side opening of the ignition hole is easy to be too small, if the angle is too small, the path of the primary air quantity entering the air inlet hole is easy to be too long, the secondary air is not beneficial to be sucked, and preferably, the size of the included angle.

Further, the top of the hole wall of the inner opening of the ignition hole is partially provided with a notch. The notch design can strengthen the suction effect on the outside air, improve the air supply speed and ensure that the outside air is supplied more rapidly.

Preferably, the notch is in a transverse V shape. The middle tip part of the V-shaped structure faces the outer annular wall, so that the fire transfer distance can be effectively reduced, and the fire transfer is quicker.

In order to supplement sufficient secondary air to the ignition hole, the device also comprises an air supplement channel communicated with the ignition hole, the air inlet end of the air supplement channel is communicated with the outside, and the air outlet end of the air supplement channel, namely the air inlet hole, is communicated with the ignition hole.

In order to ensure the uniformity of the fuel gas distributed in the ignition holes, the number of the air inlets is two, and the two air inlets comprise a first air inlet and a second air inlet which are respectively arranged at two sides of the air supplement channel.

Further, the first air inlet hole is gradually inclined upwards from inside to outside.

Further, the second air inlet hole gradually inclines upwards from outside to inside. Because the first air inlet hole and the second air inlet hole are positioned at two sides of the air supplementing channel, and the air outlet directions are opposite, negative pressure can be generated at the air inlet hole of the air supplementing channel under the influence of the air outlet of primary gas and primary air entering the first air inlet hole and the second air inlet hole, and then more secondary air can be sucked.

Compared with the prior art, the utility model has the advantages of be applicable to open ignition mode also and be applicable to hidden ignition mode in the ignition passageway, the interior rampart is under the inboard opening of ignition passageway, the center of covering the body towards the fire extends and is formed with the ignition platform of transversal U-shaped of personally submitting, this ignition platform can subtract the biography fire distance of short ignition passageway and interior rampart fire lid, and the transversal U type of personally submitting of this ignition platform, can effectively prevent that the gas of ignition passageway from being diluted by external cold air, the gas concentration of ignition platform has been ensured, the suitability reinforcing of ignition passageway to the air door aperture simultaneously, can also guarantee the biography fire performance under the great condition of air door aperture promptly.

Drawings

FIG. 1 is a schematic structural view of an integral burner with a fire cover disposed on a base according to an embodiment of the present invention;

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

FIG. 3 is an opposite partial cross-sectional view of FIG. 2;

fig. 4 is an enlarged schematic view of a portion a of fig. 2.

Detailed Description

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

As shown in FIGS. 1 to 4, 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 guiding channel is radially arranged on the annular top wall 11 of the fire cover body 1, the fire guiding channel is provided with a gas inlet hole communicated with the gas mixing cavity 14, the gas inlet hole can be opened at the bottom of the fire guiding channel, an outer opening 22 of the fire guiding channel is positioned on the outer annular wall 13, an inner opening 23 of the fire guiding channel faces the center of the fire cover body 1, and an ignition platform 30 with a U-shaped cross section is formed by extending the inner annular wall 12 below the inner opening 23 of the fire guiding channel and towards the center of the fire cover body. The ignition channel is more preferably suitable for a hidden ignition hole 2 structure, the ignition platform 30 can shorten the ignition distance between the ignition hole 2 and the inner ring fire cover 40, the gas of the ignition platform 30 easily enters the explosion region of the gas due to sufficient air, a similar explosion effect is formed after ignition, the explosion flame is spread into the ignition channel, and the ignition speed is high; meanwhile, the ignition platform 30 can effectively prevent the gas of the ignition channel from being diluted by the external cold air, so that the gas concentration of the ignition platform 30 is ensured, in addition, the ignition channel is of a hidden ignition hole 2 structure, the applicability to the opening degree of the air door is enhanced, and the fire transfer performance can be ensured under the condition of larger opening degree of the air door.

In order to slow down the gas outlet speed of the gas, the ignition hole 2 is provided with an inclined end face, the top end of the inclined end face is closer to the center of the fire cover body 1 than the bottom end, an included angle alpha formed between a connecting line of the top end and the bottom end of the inclined end face and the ignition platform 30 is an acute angle, and meanwhile, overflowing liquid can be prevented from entering the ignition hole 2 through the inner side opening 23.

Because the pilot channel is hidden pilot hole 2, on the one hand can open the air door big, make the primary air volume increase of entering inlet port speed grow simultaneously, thereby can more entrainment the secondary air and get into the pilot channel, the gas, can directly strike with the top of the 2 inboard opening 23 inclined end face of pilot hole behind primary air and the secondary air mixture, the mixing uniformity of gas and air in the gas mixture has been improved, the velocity of flow has been reduced simultaneously again, the steady flame performance has been improved, if this angle is too big, then cause the impinging area undersize of the inboard opening 23 top 231 of gas mixture and pilot hole 2 easily, if this angle undersize, then cause the path overlength of the primary air volume of entering inlet port easily, be unfavorable for the entrainment secondary air. Preferably, the included angle α is 45 ° ≦ α ≦ 80 °, and α is 70 ° in this embodiment. The top 231 of the hole wall of the inner opening 23 of the ignition hole 2 is partially provided with a notch 2311, and the notch 2311 is designed to strengthen the suction effect on the outside air, improve the air supply speed and enable the secondary air to be supplied more quickly. Wherein, breach 2311 is horizontal "V" style of calligraphy, and the middle tip position of V style of calligraphy is towards outer rampart 13, and the middle tip position of V style of calligraphy can effectively reduce the distance of spreading a fire towards outer rampart 13 like this for it is faster to spread a fire. In order to supplement sufficient secondary air to the ignition hole 2, the gas mixing chamber also comprises an air supplement channel 3, the air supplement channel 3 can be isolated relative to the gas mixing chamber 14, the air inlet end 31 of the air supplement channel 3 is communicated with the outside, and the air outlet end, namely the air inlet hole 32, of the air supplement channel 3 is communicated with the ignition hole 2. Meanwhile, the ignition channel is a hidden ignition hole 2, and the uniformity of the fuel gas distributed in the ignition hole 2 is ensured, the number of the air inlets is two, the two air inlets comprise a first air inlet 211 and a second air inlet 212 which are respectively arranged at two sides of the air supplementing channel 3, the first air inlet 211 gradually inclines upwards from inside to outside, the second air inlet 212 gradually inclines upwards from outside to inside, and the first air inlet 211 and the second air inlet 212 are positioned at two sides of the air supplementing channel and have opposite air outlet directions, so that negative pressure can be generated at the air inlet 32 of the air supplementing channel 3 under the influence of the air outlet of the primary fuel gas and the primary air entering the first air inlet 211 and the second air inlet 212, and then more secondary air can be sucked. Finally, the fire cover for the gas stove optimally designs the hidden type ignition channel structure, and improves the fire transmission performance.

Claims

1. The utility model provides a fire lid for gas-cooker, is including fire lid body (1), is formed with air mixing chamber (14) between annular roof (11) of this fire lid body (1) and the inner ring wall (12), the outer ring wall (13) that extend downwards from the inboard edge, the outside edge of this annular roof (11) are vertical or slope, at annular roof (11) of fire lid body (1) are along radially being equipped with the ignition passageway, the ignition passageway opens has the inlet port that communicates air mixing chamber (14), its characterized in that: the inner ring wall (12) is arranged below the inner side opening (23) of the ignition channel and extends towards the center of the fire cover body (1) to form an ignition platform (30) with a U-shaped cross section.

2. Fire cover for gas cookers according to claim 1, characterized in that: the ignition channel is an ignition hole (2).

3. Fire cover for gas cookers according to claim 2, characterized in that: the inner side opening (23) of the ignition hole (2) is provided with an inclined end face, the top end of the inclined end face is closer to the center of the fire cover body (1) than the bottom end, and an included angle alpha formed between a connecting line of the top end and the bottom end of the inclined end face and the ignition platform (30) is an acute angle.

4. Fire cover for gas cookers according to claim 3, characterized in that: the size of the included angle alpha is more than or equal to 45 degrees and less than or equal to 80 degrees.

5. Fire cover for gas cookers according to claim 3, characterized in that: the top (231) of the hole wall of the inner opening (23) of the ignition hole (2) is partially provided with a notch (2311).

6. Fire cover for gas cookers according to claim 5, characterized in that: the notch (2311) is in a transverse V shape.

7. Fire cover for gas cookers according to claim 2, characterized in that: the gas-liquid separation device is characterized by further comprising an air supplement channel (3) communicated with the ignition hole (2), wherein the air inlet end (31) of the air supplement channel (3) is communicated with the outside, and the air outlet end of the air supplement channel (3) is an air inlet hole (32) communicated with the ignition hole (2).

8. Fire cover for gas cookers according to claim 7, wherein: the air inlet holes are two, and comprise a first air inlet hole (211) and a second air inlet hole (212) which are respectively arranged on two sides of the air supplementing channel (3).

9. Fire cover for gas cookers according to claim 8, wherein: the first air inlet holes (211) are gradually inclined upwards from inside to outside.

10. Fire cover for gas cookers according to claim 9, wherein: the second air inlet holes (212) are gradually inclined upwards from outside to inside.