CN216557135U - Burner fire cover for gas stove and stove applying burner fire cover - Google Patents

Abstract

The utility model relates to a burner fire cover for a gas stove and a stove using the burner fire cover, comprising a first fire cover, and characterized in that: the first fire cover comprises an annular peripheral wall, the annular peripheral wall comprises a first wall part which is partially and radially inwards contracted, and at least one through hole is formed in the first wall part corresponding to the ignition needle and/or the thermocouple.

Description

Burner fire cover for gas stove and stove applying burner fire cover

Technical Field

The utility model relates to a burner of a gas cooker, in particular to a burner fire cover for a gas cooker and a cooker applying the burner fire cover.

Background

A common household burner generally has an outer fire cover and an inner fire cover, and together with an ignition needle, a thermocouple (or an ion sensing needle with the same function), and other elements, realizes the functions of generating flame, maintaining flame, and the like. The outer fire lid structure of present combustor generally includes the outer first fire lid that has a plurality of main fire passageways, and outer first fire lid lower extreme face has the gas mixing chamber, and this gas mixing chamber and main fire passageway intercommunication, main fire passageway form main fire hole at outer first fire lid outer terminal surface outward. Such patent documents refer to a conical fire cover for a gas stove burner (publication number CN2842216Y) in chinese utility model patent No. ZL200520014838.2, and refer to a burner fire cover (publication number CN202149492U) in chinese utility model patent No. ZL 201120246965.0. The single main fire hole combustion method disclosed above has disadvantages that the flame is likely to jump after combustion and the combustion area is unstable. A plurality of outer fire cover structures with flame stabilizing functions are disclosed in the prior art, for example, the Chinese utility model patent with the patent number ZL200920112857.7 (the patent number of the authorized bulletin is CN201377835Y) discloses an outer fire cover of a gas stove, wherein flame stabilizing holes are arranged on the vertical surface of the outer side of the outer fire cover, the flame stabilizing holes are positioned below the outer fire holes and are alternately arranged with the outer fire holes, and the inner ends of the flame stabilizing holes are communicated with a gas channel of the fire cover. Due to the arrangement of the flame stabilizing holes, the combustion efficiency is greatly improved, and the emission of carbon monoxide in a room can be reduced. However, the overflow liquid easily enters the main fire hole or the flame stabilizing hole to block the main fire channel or the flame stabilizing channel, and the gas stove is not ignited when the blocked fire hole corresponds to the vicinity of the ignition needle, and the gas stove cannot maintain the flame when the blocked fire hole corresponds to the vicinity of the thermocouple (or the ion induction needle with the same function).

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the present invention is to provide a burner fire cover for a gas stove, which can improve the success rate of ignition or fire protection, in view of the above-mentioned prior art.

The second technical problem to be solved by the present invention is to provide a cooking stove with the burner fire cover and capable of improving the uniform mixing of primary air and fuel gas.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: this a combustor fire lid for gas-cooker, including first fire lid, its characterized in that: the first fire cover comprises an annular peripheral wall, the annular peripheral wall comprises a first wall part which is partially retracted inwards in the radial direction, and at least one through hole is formed in the first wall part corresponding to the ignition needle and/or the thermocouple.

Further, the annular peripheral wall includes a C-shaped outer annular wall and a C-shaped connecting wall connecting end portions of the C-shaped outer annular wall, and the C-shaped connecting wall is the first wall portion. The ignition hole structure that contracts inwards can ensure that ignition needle department fire hole does not have the risk of jam, has promoted the factor of safety of igniting the success rate by a wide margin.

Furthermore, a first auxiliary ignition hole and a second auxiliary ignition hole are respectively arranged on the C-shaped connecting wall, and the central lines of the first auxiliary ignition hole and the second auxiliary ignition hole are intersected. First supplementary ignition hole and the supplementary ignition hole of second distribute in the through-hole both sides with less diameter, play further reduction ignition hole air velocity, increase the purpose of tolerance simultaneously, verified through the experiment that the ignition success rate that has increased the fire lid by a wide margin, guarantee the bigger air supply suitability of fire lid.

In order to further improve the success rate of ignition, it is preferable that end portions of the C-shaped connecting wall are further provided with a third auxiliary ignition hole and a fourth auxiliary ignition hole, respectively, a circle of vertical wall surface extends radially outward from the C-shaped outer annular wall of the first fire cover, a flame stabilizing groove for stabilizing flame is formed between the vertical wall surface and the C-shaped outer annular wall, the flame stabilizing groove corresponds to a widening portion where the third auxiliary ignition hole and the fourth auxiliary ignition hole are locally widened along the radial width, and the third auxiliary ignition hole and the fourth auxiliary ignition hole are communicated with the widening portion, respectively. The gas in the third auxiliary ignition hole and the fourth auxiliary ignition hole flows into the widening part after flowing out, the air flow speed at the outlets of the third auxiliary ignition hole and the fourth auxiliary ignition hole is greatly reduced under the condition that the gas output is enough, the vicinity of the through hole is filled with low-speed air flow, and the effect that the gas is instantly burnt after discharging is ensured. After the ignition is successful, the flame can be rapidly diffused to the flame stabilizing grooves along the ignition widening part towards two sides, and the success rate of ignition and flame transfer is efficiently ensured.

In order to prevent the overflowing liquid from affecting the ignition needle and/or the thermocouple, it is preferable that a first waterproof brim and a second waterproof brim respectively extending outward in a radial direction of the first fire cover are provided at positions of the top wall of the first fire cover corresponding to the through hole and the auxiliary ignition hole, and a lowest point of the second waterproof brim is higher than a lowest point of the first waterproof brim.

From the manufacturing angle of the primary waterproof eaves, from the viewpoint of simple structure, it is preferable that the vertical wall surface has a notch recessed from bottom to top at a position corresponding to the through hole and the auxiliary ignition hole, a lowest end of the notch is higher than the through hole, and a portion of the vertical wall surface where the notch is formed constitutes the primary waterproof eaves.

In order to further stabilize the flame of the first main fire hole, preferably, the first fire cover includes a first main fire hole and a flame stabilizing hole which simultaneously penetrate through the C-shaped outer ring wall and the vertical wall surface, and the flame stabilizing groove penetrates through the first main fire hole and the flame stabilizing hole.

Furthermore, the first fire cover comprises second main fire holes which are arranged along the circumferential direction of the C-shaped outer ring wall at intervals, and the fire outlet diameter of each second main fire hole is smaller than that of each first main fire hole. In the direction of top-down, waterproof eaves of second grade, waterproof eaves of one-level, first main fire hole and second main fire hole distribute respectively on the diameter of difference, and its diameter top-down progressively reduces, consequently can place to the inboard of first fire lid when preventing the thermocouple, prevents to put out the phenomenon of flame because of a small amount of overflow produces in the process of protecting a fire, has promoted the success rate of protecting a fire by a wide margin.

In order to realize the fool-proofing of the first fire cover, preferably, a positioning column for positioning the first fire cover is arranged in the first fire cover, the positioning column is provided with a vertical hole vertically formed and a transverse hole communicated with the through hole, and the diameter of the transverse hole is smaller than that of the through hole.

Also, in order to prevent the flash from affecting the ignition needle and/or the thermocouple, it is preferable that a surface of the top wall of the first fire cap is at least partially depressed downward to form a liquid storage groove for buffering the flash, and the top wall of the first fire cap has a flash outlet communicated with the liquid storage groove. The liquid storage tank can also slow down the influence of the overflowing liquid on the fire outlet of the first fire cover to a certain extent.

In order to further reduce the gas flow velocity of the ignition hole, it is preferable that the C-shaped connecting wall further has a first convex wall and a second convex wall extending radially inward at positions corresponding to the first auxiliary ignition hole and the second auxiliary ignition hole, respectively. The design of first protruding wall and second protruding wall can increase the route of giving vent to anger of first supplementary ignition hole and second supplementary ignition hole, plays to reduce the air velocity of first supplementary ignition hole and second supplementary ignition hole, can increase the ignition success rate of fire lid by a wide margin.

Further, wall surfaces of the first convex wall and the second convex wall are respectively inclined towards the end point part of the corresponding C-shaped connecting wall. First protruding wall and second protruding wall are to its slope to the terminal point portion of C shape connecting wall promptly third auxiliary ignition hole and fourth auxiliary ignition hole position, can lead the gas two places like this, make near the through-hole be full of the low-speed air current, guarantee to discharge the effect of burning promptly, in addition, because the gas in third auxiliary ignition hole and the fourth auxiliary ignition hole finally can flow into in the broadening portion after flowing out, still under the sufficient circumstances of assurance air output, can reduce the air velocity of the export of third auxiliary ignition hole and fourth auxiliary ignition hole by a wide margin, can make near the through-hole be full of the low-speed air current equally, guarantee to discharge the effect of burning promptly.

In order to facilitate the user to lift the first fire cover together when cleaning the burner, preferably, the C-shaped connecting wall is further provided with a first mounting hole for mounting a connecting piece, and the first mounting hole and the through hole are arranged at an interval. Utilize the connecting piece to connect on first mounting hole to cover first fire and connect on its base that corresponds, have clean convenient while can also avoid the user to cover the phenomenon emergence of misplacing first fire easily after having cleaned first fire. In order to solve the second technical problem, preferably, a cooking appliance with the burner fire cover is provided, which includes a mounting seat, and is characterized in that: still be provided with on the mount pad:

a C-shaped base, wherein the base comprises a C-shaped outer wall and a C-shaped inner wall connecting the ends of the C-shaped outer wall, and the C-shaped inner wall encloses a cavity for accommodating an ignition needle and a/or a thermocouple;

the first fire cover is covered on the base to form a first gas mixing chamber in the center;

the gas outlet of the first injection pipe is communicated with the first gas mixing chamber; and

and the first ejector is communicated with the air inlet of the first injection pipe.

In order to realize that the user can independently control the inner ring fire and the outer ring fire, preferably, the mounting seat is further provided with:

the second gas mixing chamber is arranged at the periphery of the mounting seat and comprises an inner ring wall surface, an outer ring wall surface and a bottom wall, the inner ring wall surface and the outer ring wall surface are concentrically arranged at intervals, the bottom wall is connected with the inner ring wall surface and the outer ring wall surface, a second fire cover covers the inner ring wall surface and the outer ring wall surface, and the inner ring wall surface, the outer ring wall surface, the bottom wall and the second fire cover are jointly surrounded into the second gas mixing chamber;

the second injection pipe is arranged on the mounting seat, and an air outlet of the second injection pipe is communicated with the second gas mixing chamber;

the second ejector is arranged on the mounting seat and communicated with the air inlet of the second injection pipe; and

the flow equalizing plate is arranged on the outer ring wall surface of the second gas mixing chamber, is higher than the gas outlet of the second injection pipe and is used for equalizing the gas flowing out of the second injection pipe, and the flow equalizing plate is provided with a narrow part close to the gas outlet of the second injection pipe.

Further, the flow equalizing plate further comprises a wide portion which continues to flow from the narrow portion in the flow direction of the fuel, and the width ratio of the narrow portion to the wide portion is 2: 3. Wherein be equipped with the uniform flow board in the second gas mixing chamber, the height of uniform flow board is higher than the second and draws a tub export, and the air current draws tub export because the effect of turning to at tangent turning to the effect air current can partially turn to after getting into the second gas mixing chamber when, and partial air current can flow upwards, nevertheless draws a tub exit at the second because tangential momentum is great, and ascending air current flow is less, consequently adopts 4 mm's narrow part here, leads to the air current when guaranteeing that the air current is even, diffuses to the circumferencial direction. After the air flow is turned at 25 degrees, the speed is gradually reduced, the pressure is taken as the main part, the upward flowing trend of the air flow is gradually obvious, and the wide part with the width of 6mm can ensure that the air flow uniformly flows upwards in the range of 100 degrees and the circumferential flowing of the air flow is ensured at the same time.

Further, an included angle alpha is formed between the connecting line of the narrow part and the wide part and the center of the second air mixing chamber, and the included angle alpha is larger than or equal to 100 degrees and smaller than or equal to 150 degrees. As analyzed above, in order to ensure a uniform upward flow of the air flow in the range of 100 DEG and at the same time a circumferential flow of the air flow, an angle alpha is formed between the narrow portion and a line connecting the wide portion and the center of the second air-mixing chamber, and 100 DEG-alpha is less than or equal to 150 deg.

Further, the second injection pipe is partially protruded out of the upper surface of the bottom wall adjacent to the narrow part of the uniform flow plate, and the protruded part occupies 1/3 of the peripheral perimeter of the second gas mixing chamber. The air flow can be basically uniformly distributed in the residual cavity after the air flow rotates by 125 degrees through the uniform flow plate, the distribution of the air flow can be controlled through the convex part of the second injection pipe, the uniform distribution of the air flow can be just controlled through the uniform flow plate at the front 125 degrees of the whole second air mixing chamber, and the uniform distribution of the air flow is controlled through the convex part of the second injection pipe at the rest part.

Further, the part of the second air mixing chamber, which corresponds to the part of the second injection pipe, which is adjacent to the narrow part of the uniform flow plate and partially protrudes out of the upper surface of the bottom wall, and the interval part between the uniform flow plate are higher than the bottom wall, and the higher part also accounts for 1/3 of the peripheral perimeter of the second air mixing chamber. After the rotation of 125 deg. after passing through the uniform flow plate, the air flow can be basically uniformly distributed in the rest cavity, and 1/3 part can be uniformly distributed by the raised part. The front 125 degrees in the whole second air mixing chamber just can control the uniform distribution of the air flow through the uniform flow plate, and the rest part controls the uniform distribution of the air flow through the higher part and the convex part of the second ejector.

In order to enable the connection of the first fire cover, it is preferable that the C-shaped inner wall of the base has a connecting seat extending upward, the connecting seat has a second mounting hole corresponding to the first mounting hole, and the first fire cover and the base can be integrally connected in a state where the connecting member is connected to the first mounting hole and the second mounting hole.

From the viewpoint of simple structure, preferably, a nut seat is embedded in the second mounting hole of the connecting seat, and the connecting member is a screw and is in threaded connection with the nut seat.

For fool-proofing of the first fire lid, preferably, the connecting seat is located between the first convex wall and the second convex wall of the first fire lid for positioning the first fire lid. Wherein first protruding wall and second protruding wall except foretell increase the route of giving vent to anger of first supplementary ignition hole and second supplementary ignition hole, and then play the effect that reduces the air velocity of first supplementary ignition hole and second supplementary ignition hole, still have and cooperate the joint play the foolproof effect to first fire lid jointly with the connecting seat.

In order to avoid ignition failure caused by the connecting base blocking the through hole, preferably, the highest point of the connecting base is lower than the through hole.

In order to make the primary air/gas mixture of the first injection pipe more uniformly mixed, preferably, the connecting seat is substantially L-shaped and comprises a transverse part connected with the C-shaped inner wall and an upward extending vertical part, the air outlet of the first injection pipe is located below the transverse part, and correspondingly, the transverse part is gradually inclined upwards from bottom to top along the airflow direction of the first injection pipe. Wherein the connecting seat is except foretell "prevent slow-witted" effect, still have the gas direction through-hole that can flow out with the gas outlet of first ejector pipe and the central zone at first fire lid top, the part of vertical portion has increased the length that first ejector pipe was equivalent to, simultaneously can also make the gas and primary air's mixture more even back flow in the central zone at the top of through-hole and first fire lid again, can also avoid gas and primary air to converge and the interact by not equidirectional when improving the success rate of igniteing, it is even to spread all around directly from the central zone at the top of first fire lid, make its diffusion even, thereby make the regional stable and even flame that can keep back a fire of first fire lid, thereby make the flame of last air inlet burner short, it is even and powerful, yellow flame can not appear, defects such as the like.

In order to avoid the kinetic energy weakening caused by the pressure reduction of the gas in the first injection pipe from the gas inlet to the gas outlet, preferably, the inner cavity of the first injection pipe is sequentially provided with a horn section and a diffusion section along the gas flow direction from the gas inlet to the gas outlet, the horn section is positioned in the second gas mixing chamber and positioned at the downstream of the gas outlet of the second injection pipe, and the horn section is higher than the gas outlet of the second injection pipe and lower than the uniform flow plate. The trumpet section is higher than the gas outlet of the second injection pipe and is lower than the uniform flow plate, so that the gas can be accelerated between the trumpet section and the second injection pipe, the gas flows to the second gas mixing chamber with larger power, and the flame can be kept stable and uniform in the fire outlet area of the second fire cover corresponding to the second injection pipe.

In order to avoid the first injector from being blocked by the overflowing liquid, preferably, the first injector is limited on a first injection seat, a first supporting part for supporting the second air mixing chamber is arranged on the first injection seat, the outer ring wall surface of the second air mixing chamber extends downwards to form a circle of skirt edge, and the skirt edge is provided with a gap for supplementing air corresponding to the first injection seat. When can block the overflow through the shirt rim outside first injection seat, because the setting of breach can also promote the better entering first sprayer of primary air, improve the index of refraction of primary air.

In order to realize the combustion heat efficiency of the second fire cover, preferably, the second fire cover comprises a fire cover body, the annular peripheral wall of the fire cover body is circumferentially provided with main fire holes and first flame stabilizing holes which are sequentially and alternately arranged with the main fire holes, and the annular peripheral wall is circumferentially provided with a groove which is intersected with the main fire holes and the first flame stabilizing holes. Wherein first steady flame hole is used for the main fire hole of steady flame and then can constitute steady voltage portion with the recess that main fire hole and first steady flame hole all intersect, can form the fire ring that goes out of round, can also show the combustion efficiency who improves the second fire lid when the main fire hole is lived to the steady flame.

Furthermore, the annular peripheral wall of the second fire cover is also provided with second flame stabilizing holes at the lower row of the first flame stabilizing holes, and the included angle alpha between the central line of the second flame stabilizing holes and the central line of the groove is an acute angle. Wherein main flame hole still has the second and stabilizes the flame hole, can play dual steady flame effect to main flame hole together with first steady flame hole, in addition, the second is stabilized the flame hole and is not lain in with the crossing reason of recess: the second flame stabilizing holes can serve as the second row of main flame holes, the combustion heat efficiency of the second flame cover can be improved, the included angle alpha between the second flame stabilizing holes and the groove is an acute angle, the air outlet speed of the second flame stabilizing holes can be reduced in a hedging mode, and the purpose of the flame stabilizing effect is improved.

In order to better supplement secondary air to the second flame stabilizing holes, preferably, the skirt is gradually inclined towards the second flame stabilizing holes from bottom to top, and an inward contraction area is formed by locally and radially inward contracting under the second flame stabilizing holes. This shirt rim can make secondary air paste the root of second steady flame hole and supply to the slope of second steady flame hole from bottom to top better to because the retraction area can produce the air vortex at the replenishment in-process, the air vortex can be rolled up and is inhaled more air and enter into the flame root of second steady flame hole, make the supplementary air more abundant, promote combustion efficiency and reduce the flue gas.

Furthermore, the second fire cover is an annular fire cover body and comprises an inner annular wall and an annular top wall, the inner annular wall is arranged at an interval with the annular peripheral wall, the annular top wall is connected with the inner annular wall and the annular peripheral wall, a fire ignition channel is arranged on the annular top wall of the fire cover body along the radial direction, an air inlet hole communicated with the second air mixing chamber is formed in the bottom of the fire ignition channel, and a fire ignition platform extending towards the center direction of the first fire cover is arranged at the position, below the inner side opening of the fire ignition channel, of the inner annular wall. This priming platform can subtract the biography fire distance of short priming passageway and inner ring fire lid to this priming platform can effectively prevent that the gas of priming passageway from being diluted by external cold air, has ensured the gas concentration of priming platform, and the suitability reinforcing of priming passageway to the air door aperture simultaneously also can guarantee to pass the fire performance under the great condition of air door aperture promptly.

In order to achieve the above-mentioned purpose, when a user can conveniently lift the whole burner when cleaning the burner, in addition to the fixed connection of the first fire cover and the base, the second fire cover and the second gas mixing chamber also need to be fixedly connected, preferably, the inner ring wall abuts against the inner ring wall of the second gas mixing chamber, correspondingly, the inner ring wall is provided with an abutting table abutting against the ignition table, and is connected with the ignition table into a whole through a fastening piece penetrating through the abutting table from bottom to top. In order to further protect the ignition needle and the thermocouple from the surrounding wind or from being cleaned, it is preferable that the mounting seat has a protective seat protruding from a surface of the mounting seat at a position corresponding to the ignition needle and/or the thermocouple, the protective seat includes a seat body and a mounting hole provided in the seat body for mounting the ignition needle and/or the thermocouple, and the ignition needle and/or the thermocouple are supported at least partially on a tip end of the seat body.

Compared with the prior art, the utility model has the advantages that the through hole with the inward-contracted part relative to the burner fire cover is provided, so that the ignition needle and/or the thermocouple are hidden in the C-shaped cavity of the base to improve the use environment of the ignition needle and/or the thermocouple, on one hand, the overflowing liquid can be prevented from entering the through hole, on the other hand, the ignition needle and the thermocouple can be protected effectively without being influenced by the surrounding wind power, the ignition success rate of the ignition needle and/or the fire retention rate of the thermocouple are improved, and the service life of the ignition needle and/or the thermocouple can be prolonged.

Drawings

Fig. 1 is a schematic structural view of a second fire cover in embodiment 1 of the present invention;

FIG. 2 is a schematic view of another angle of FIG. 1;

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

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

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

fig. 6 is a sectional view of a cooking appliance in an angle according to embodiment 1 of the present invention;

fig. 7 is a sectional view of a cooking appliance according to embodiment 1 of the present invention at another angle;

fig. 8 is a sectional view of a cooking appliance according to embodiment 1 of the present invention at still another angle;

FIG. 9 is a schematic structural diagram of a burner in a cooking appliance in embodiment 1 of the present invention;

FIG. 10 is a schematic view of FIG. 9 with the first and second fire covers omitted;

FIG. 11 is a schematic view of the structure of FIG. 10 at one angle;

FIG. 12 is a schematic view of the structure at another angle of FIG. 10;

FIG. 13 is a schematic structural view of a burner at another angle in the cooker in embodiment 1 of the present invention;

FIG. 14 is a schematic view showing the structure of a burner in embodiment 2 of the present invention;

fig. 15 is a schematic structural view of a first fire cover in embodiment 2 of the present invention;

FIG. 16 is a schematic view showing another angle structure of the first fire cover in embodiment 2 of the present invention;

FIG. 17 is an angled cross-sectional view of a burner according to example 3 of the present invention;

FIG. 18 is a sectional view of a burner at another angle in embodiment 3 of the present invention;

FIG. 19 is a cross-sectional view of FIG. 17 with the first and second fire covers removed;

fig. 20 is a schematic structural view of a second fire cover in embodiment 3 of the utility model;

fig. 21 is a schematic structural view of a first ejector pipe in embodiment 5 of the present invention;

FIG. 22 is a schematic view showing a structure in which a burner is mounted on a mount in embodiment 6 of the present invention;

FIG. 23 is an angular cross-sectional view of a burner according to embodiment 6 of the present invention;

FIG. 24 is a sectional view of a burner at still another angle in embodiment 6 of the present invention;

FIG. 25 is a schematic structural view of a mounting base in embodiment 6 of the present invention;

FIG. 26 is an angular cross-sectional view of a second fire cover in accordance with embodiment 7 of the present invention;

FIG. 27 is a sectional view at another angle of the second fire cover in embodiment 7 of the present invention;

Detailed Description

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

Example 1

As shown in FIGS. 1 to 13, the preferred embodiment of the present invention is shown. The cooker of the embodiment comprises a mounting seat 1 and a second gas mixing chamber 2 arranged on the periphery of the mounting seat 1, wherein the second gas mixing chamber 2 comprises an inner ring wall surface 21 and an outer ring wall surface 22 which are concentrically arranged at intervals and a bottom wall 23 for connecting the inner ring wall surface 21 and the outer ring wall surface 22, a second fire cover 3 covers the inner ring wall surface 21 and the outer ring wall surface 22, and the inner ring wall surface 21, the outer ring wall surface 22, the bottom wall 23 and the second fire cover 3 are jointly enclosed into the second gas mixing chamber 2; the second injection pipe 4 is arranged on the mounting seat 1, and an air outlet 41 of the second injection pipe 4 is communicated with the second gas mixing chamber 2; the second ejector 5 is also arranged on the mounting seat 1 and communicated 9 with the air inlet 42 of the second injection pipe 4, the flow equalizing plate 6 is arranged on the outer ring wall surface 22 of the second air mixing chamber 2 and is higher than the air outlet 41 of the second injection pipe 4, the flow equalizing plate 6 is used for equalizing the fuel gas flowing out of the second injection pipe 4, and the air outlet 41 of the flow equalizing plate 6, which is adjacent to the second injection pipe 4, is provided with a narrow part 61. The second gas mixing chamber 2 is internally provided with a flow equalizing plate 6, the height of the flow equalizing plate 6 is higher than that of an air outlet 41 of the second injection pipe 4, after the gas flow ejected from the second injection pipe 4 enters the second gas mixing chamber, partial gas flow can flow upwards while the gas flow can partially turn due to the turning action of a tangent corner, but the air flow at the air outlet 41 of the second injection pipe 4 is small due to large tangential momentum and small upward gas flow, so that a narrow part 61 is adopted at the position to guide the gas flow while ensuring uniform gas flow and diffuse the gas flow in the circumferential direction, so that primary air and gas in the second gas mixing chamber 2 can be mixed more sufficiently, the gas and the primary air are prevented from colliding with each other due to the convergence in different directions, the uniformity of the mixing of the primary air and the gas is further improved, the suction rate of the primary air is improved, and the kinetic energy loss can be effectively reduced, the diffusion of the flame is uniform, so that the flame can be kept stable and uniform in the flame outlet area supplied to the second fire cover 3 by the second gas mixing chamber 2, the flame of the upper air inlet burner is short, uniform and powerful, and the defects of yellow flame, tempering and the like can not occur.

Specifically, the uniform flow plate 6 further comprises a wide part 62 which continues to flow from the narrow part 61 along the fuel flow direction, the width ratio of the narrow part 61 to the wide part 62 is 2:3, the uniform flow plate 6 is arranged in the second gas mixing chamber 2, the height of the uniform flow plate 6 is higher than that of the outlet of the second injection pipe 4, after the air flow enters the second gas mixing chamber 2, due to the turning action of tangential corners, the air flow can partially turn, meanwhile, part of the air flow can flow upwards, but due to the fact that the tangential momentum is large at the outlet of the second injection pipe 4, the flow rate of the upward air flow is small, and therefore the narrow part 61 with the thickness of 4mm is adopted here, the air flow is guided and diffused in the circumferential direction while the uniformity of the air flow is guaranteed. After the turning of 25 degrees, the speed is gradually reduced, the upward flowing trend of the airflow is gradually obvious mainly by pressure, and the wide part 62 with the width of 6mm can ensure that the airflow uniformly flows upwards in the range of 100 degrees and the circumferential flowing of the airflow is ensured at the same time. And an included angle alpha is formed between the connecting line of the narrow part 61 and the wide part 62 and the center of the second air mixing chamber 2, and alpha is more than or equal to 100 degrees and less than or equal to 150 degrees. As analyzed above, in order to ensure a uniform upward flow of the air flow in the range of 100 ° while ensuring a circumferential flow of the air flow, the narrow portion 61 and the wide portion 62 form an angle α with a line connecting the centers of the second air-mixing chamber 2, and 100 ° α or more and 150 ° or less. The second injection pipe 4 is partially protruded from the upper surface of the bottom wall 23 near the narrow part 61 of the uniform flow plate 6, and the protruded part 43 occupies 1/3 of the peripheral perimeter of the second air mixing chamber 2, and the air flow can be substantially uniformly distributed in the remaining cavity 74 after the rotation of the uniform flow plate 6125 degrees, and the distribution of the air flow can be controlled by the protruded part of the second injection pipe 4, the uniform distribution of the air flow can be controlled just by the uniform flow plate 6 at the front 125 degrees of the whole second air mixing chamber 2, and the uniform distribution of the air flow can be controlled by the protruded part 43 of the second injection pipe 4 at the rest part. The part of the second air mixing chamber 2, which corresponds to the part of the second ejector pipe 4, is locally protruded out of the upper surface of the bottom wall 23 near the narrow part 61 of the flow equalizing plate 6, and the spacing part 20 between the flow equalizing plate 6 is higher than the bottom wall 23, and the higher part also accounts for 1/3 of the peripheral perimeter of the second air mixing chamber 2, so that the air flow can be basically and uniformly distributed in the residual cavity 74 after the second air mixing chamber 6 rotates by 125 degrees, and the 1/3 part can be uniformly distributed through the higher part. The front 125 degrees in the whole second air mixing chamber 2 just can control the uniform distribution of the air flow through the uniform flow plate 6, and the rest part controls the uniform distribution of the air flow through the higher part and the convex part of the second ejector.

In order to effectively reduce the whole height of the combustor and prevent the nozzle from being blocked by overflowing liquid, the mounting base 1 is also provided with a base 7; the first fire cover 8 is covered on the base 7 to form a first gas mixing chamber 80 positioned in the center, the first injection pipe 9 is arranged, the gas outlet 41 of the first injection pipe 9 is communicated with the first gas mixing chamber 80, the first injector 10 is communicated with the gas inlet 42 of the first injection pipe 9, the base 7 is utilized to cancel a conventional bottom cup positioned below a panel, and the first injector 10 and the second injector 5 are directly installed through the base 7, so that the first injector 10 and the second injector 5 can directly supplement air through an air passage above the mounting seat 1, the supplement is convenient, and the sufficient air supplement amount can be ensured to promote the sufficient combustion of the combustor; in addition, the conventional bottom cup positioned below the containing mounting seat 1 is eliminated, and meanwhile, the second injection pipe 4 is skillfully and locally arranged in the second gas mixing chamber 2, so that on one hand, the overall height of the combustor can be reduced, and on the other hand, the potential safety hazard caused by gas leakage when the second injection pipe 4 is connected by a seam can be avoided; the utility model adopts a mode of a plurality of nozzles and a plurality of injection pipes, overcomes the limitation that the injection pipes are limited in the diameter range of the combustor to cause the size of the injection pipes to be still short, ensures the primary air injection capacity of the combustor and realizes large firepower. The base 7 of this embodiment is C-shaped, the base 7 includes a C-shaped outer wall 71 and a C-shaped inner wall 73 connecting an end 72 of the C-shaped outer wall 71, and the C-shaped inner wall 73 defines a cavity 74 for accommodating an ignition needle and/or a thermocouple, and at least one through hole 81 is formed in the first cap 8 at a position corresponding to the ignition needle and/or the thermocouple, and the ignition needle and/or the thermocouple is hidden in the C-shaped cavity 74 of the base 7 to improve a use environment of the ignition needle and/or the thermocouple, on one hand, to prevent a liquid spill from entering the through hole 81, and on the other hand, to protect the ignition needle and the thermocouple from surrounding wind, thereby improving an ignition success rate and/or a protection rate of the ignition needle, and simultaneously to prolong a service life of the ignition needle and/or the thermocouple. Correspondingly, in order to increase the success rate of ignition, it is preferable that the first ignition cover 8 includes an annular peripheral wall, the annular peripheral wall includes a first wall portion partially retracted inward in the radial direction, and at least one through hole 81 is formed in the first wall portion at a position corresponding to the ignition needle and/or the thermocouple. Specifically, the annular peripheral wall includes a C-shaped outer annular wall 82 and a C-shaped connecting wall 83 connecting end point portions 800 of the C-shaped outer annular wall 82, and the C-shaped connecting wall 83 is a first wall portion. The through hole 81 structure that contracts inwards can ensure that ignition needle department fire hole does not have the risk of jam, has promoted the factor of safety of igniting the success rate by a wide margin. Wherein, still be provided with first supplementary ignition hole 831a and second supplementary ignition hole 831b on the C shape connection wall 83 respectively, the central line of first supplementary ignition hole 831a and second supplementary ignition hole 831b is crossing, first supplementary ignition hole 831a distributes in ignition hole both sides with less diameter with second supplementary ignition hole 831b, play and further reduce through-hole 81 air velocity, increase the purpose of tolerance simultaneously, the ignition success rate of fire lid has been increased by a wide margin through experimental verification, guarantee the bigger air supply suitability of fire lid. In order to further improve the ignition success rate, it is preferable that the end portion 800 of the C-shaped connecting wall 83 is further provided with a third auxiliary ignition hole 831C and a fourth auxiliary ignition hole 831d, respectively, the first fire cover 8 has a circle of vertical wall surface 86 extending radially outward from the C-shaped outer annular wall 82, a flame stabilizing groove 87 for stabilizing flame is formed between the vertical wall surface 86 and the C-shaped outer annular wall 82, the flame stabilizing groove 87 corresponds to a widened portion 871 where the third auxiliary ignition hole 831C and the fourth auxiliary ignition hole 831d are locally widened in radial width, and the third auxiliary ignition hole 831C and the fourth auxiliary ignition hole 831d are respectively communicated with the widened portion 871. The gas in the third auxiliary ignition hole 831c and the fourth auxiliary ignition hole 831d flows out and then flows into the widening portion 871, so that the gas flow velocity at the outlets of the third auxiliary ignition hole 831c and the fourth auxiliary ignition hole 831d is greatly reduced under the condition that the gas outlet amount is enough, the vicinity of the through hole 81 is filled with low-speed gas flow, and the effect of discharging and burning the gas is ensured. Meanwhile, after ignition is successful, flame can be rapidly diffused to the flame stabilizing grooves 87 from two sides along the ignition widening part 871, and the success rate of ignition and flame transfer is efficiently ensured. In order to prevent the overflowing liquid from affecting the ignition needle and/or the thermocouple, the top wall 84 of the first fire cover 8 has a first waterproof brim 85a and a second waterproof brim 85b extending outward in the radial direction of the first fire cover 8 at positions corresponding to the through hole 81 and the auxiliary ignition hole 831, and the lowest point of the second waterproof brim 85b is higher than the lowest point of the first waterproof brim 85 a. From the manufacturing perspective of the primary waterproof eaves 85a, from the perspective of simple structure, the vertical wall surface 86 has a notch 8311 recessed from bottom to top at a position corresponding to the through hole 81 and the auxiliary ignition hole 831, the lowest end of the notch 8311 is higher than the through hole 81, and the portion of the vertical wall surface 86 where the notch 8311 is provided constitutes the primary waterproof eaves 85 a. Wherein, in order to further stabilize the flame of the first main fire hole 88, the first fire cover 8 includes a first main fire hole 88 and a flame stabilizing hole 89 which penetrate both the C-shaped outer ring wall 82 and the vertical wall surface 86, and the flame stabilizing groove 87 penetrates both the first main fire hole 88 and the flame stabilizing hole 89. Wherein, first fire lid 8 is including the second main fire hole 90 that sets up along the outer rampart 82 circumference interval of C shape, the diameter of going out fire of second main fire hole 90 is less than first main fire hole 88, and in top-down's direction, waterproof eaves 85b of second grade, waterproof eaves 85a of one-level, first main fire hole 88 and second main fire hole 90 distribute respectively on the diameter of difference, its diameter top-down progressively reduces, consequently can place to the inboard of first fire lid 8 when preventing the thermocouple, prevent to put out the phenomenon of flame because of a small amount of spills produces in the fire protection process, the success rate of guaranteeing fire has been promoted by a wide margin. In order to prevent the first fire cover 8 from being blocked, a positioning column 91 for positioning the first fire cover 8 is arranged in the first fire cover 8, the positioning column 91 is provided with a vertical hole 911 vertically formed and a transverse hole 912 communicated with the through hole 81, and the diameter of the transverse hole 912 is smaller than that of the through hole 81. Also, in order to prevent the flash from affecting the ignition needle and/or the thermocouple, it is preferable that a surface of the top wall 84 of the first fire cap 8 is at least partially recessed to form a flash storage tank 841 for buffering the flash, and the top wall 84 of the first fire cap 8 has a flash outflow port 842 communicated with the flash storage tank 841, and the flash storage tank 841 can also mitigate the effect of the flash on the fire hole of the first fire cap 8 to some extent.

The specific ignition process of the burner fire cover is as follows: when in ignition, the primary air and the fuel gas in the first air mixing chamber 80 are injected together under the action of the first ejector 10, the air and the fuel gas which are uniformly mixed in the first air mixing chamber 80 enter the through hole 81, and the air and the fuel gas are prevented from being converged in different directions and colliding with each other, so that the through hole 81 of the fire cover can keep stable and uniform flame, and the ignition success rate of the fire cover is effectively improved, in addition, the first auxiliary ignition hole 831a and the second auxiliary ignition hole 831b on the left side and the right side of the through hole 81 are distributed on two sides of the through hole 81 with smaller diameters to further reduce the air flow rate of the through hole 81, meanwhile, the fuel gas in the third auxiliary ignition hole 831c and the fourth auxiliary ignition hole 831d flows out and then flows into the widening part 871, and under the condition of ensuring enough air outlet amount, the air flow rate at the outlets of the third auxiliary ignition hole 831c and the fourth auxiliary ignition hole 831d is greatly reduced, make near the through-hole 81 be full of low-speed air current, guarantee the effect that discharges and fire promptly, after the ignition is successful simultaneously, flame can be followed the diffusion of ignition wide section 871 to both sides rapidly and spread to flame stabilizing groove 87, has guaranteed the success rate of igniting and passing a fire high-efficiently.

Example 2

As shown in fig. 14 to 16, the structure is basically the same as that of embodiment 1, and the only difference is that: in order to further reduce the air flow velocity of the ignition hole, the C-shaped connecting wall is further provided with a first convex wall 832 and a second convex wall 833 extending radially inward at positions corresponding to the first auxiliary ignition hole 831a and the second auxiliary ignition hole 831b, respectively, the first convex wall 832 and the second convex wall 833 are designed to increase the air outlet paths of the first auxiliary ignition hole 831a and the second auxiliary ignition hole 831b, to reduce the air flow velocity of the first auxiliary ignition hole 831a and the second auxiliary ignition hole 831b, to greatly increase the ignition success rate of the fire lid, and simultaneously the wall surfaces of the first convex wall 832 and the second convex wall 833 are respectively inclined toward the end point portions of the corresponding C-shaped connecting wall 83, and the first convex wall 832 and the second convex wall 833 are inclined toward the end point portions of the C-shaped connecting wall 83, i.e. the third auxiliary ignition hole 831C and the fourth auxiliary ignition hole 831d, to guide the gas to two positions, in addition, as the gas in the third auxiliary ignition hole 831c and the fourth auxiliary ignition hole 831d flows out and finally flows into the widening part, the gas flow speed at the outlets of the third auxiliary ignition hole 831c and the fourth auxiliary ignition hole 831d can be greatly reduced under the condition of ensuring enough gas outlet amount, and the vicinity of the through hole 81 can be filled with low-speed gas flow, so that the discharging and burning effect is ensured.

Example 3

As shown in fig. 17 to 19, the structure is basically the same as that of embodiment 2, and the only difference is that: in order to be convenient for a user to lift the first fire cover 8 together when cleaning the burner, the C-shaped connecting wall is further provided with a first mounting hole 830 for mounting the connecting piece 700, the first mounting hole 830 and the through hole 81 are arranged at intervals, the connecting piece 700 is connected on the first mounting hole 830, so that the first fire cover 8 is connected on the corresponding base 7, the first fire cover 8 is convenient to clean, the phenomenon that the first fire cover 8 is easily misplaced after the user cleans the first fire cover 8 is avoided, correspondingly, in order to realize the connection of the first fire cover 8, the C-shaped inner wall of the base 7 in the cooker applying the burner fire cover is provided with a connecting seat 730 extending upwards, the connecting seat 730 is provided with a second mounting hole 730a corresponding to the first mounting hole 830, the first fire cover 8 and the base 7 can be connected into a whole under the state that the connecting piece 700 is connected between the first mounting hole 830 and the second mounting hole 730a, considering from the perspective of simple structure, the connecting seat 730 is embedded with a nut seat, the connecting member 700 is a screw, and is in threaded connection with the nut seat, wherein the connecting seat 730 is further located between the first convex wall 832 and the second convex wall 833 of the first fire cover 8 to be used for positioning the first fire cover 8, so that the first convex wall 832 and the second convex wall 833 have the foolproof effect on the first fire cover 8 by cooperating with the connecting seat 730 besides the aforementioned air outlet path for adding the first auxiliary ignition hole and the second auxiliary ignition hole, and further play a role in reducing the air flow rate of the first auxiliary ignition hole 831a and the second auxiliary ignition hole 831b, and certainly, in order to avoid the connecting seat 730 from blocking the highest point 81 to cause ignition failure, the connecting seat 730 needs to be lower than the through hole 81. In order to facilitate a user to take up the whole burner when cleaning the burner, in addition to the fixed connection between the first fire cover 8 and the base 7, the second fire cover 3 and the second gas mixing chamber 2 are also required to be fixedly connected, wherein the second fire cover 3 of the embodiment is an annular fire cover body, and comprises an inner annular wall 3f arranged at an interval with the annular peripheral wall 3e and an annular top wall 3g connecting the inner annular wall 3f and the annular peripheral wall 3e, the annular top wall 3g of the fire cover body is radially provided with a fire introduction channel 3h, the bottom of the fire introduction channel 3h is provided with an air inlet hole 31h communicated with the second gas mixing chamber 2, the inner annular wall 3f is provided with a fire introduction table 31f extending towards the central direction of the first fire cover 8 at a position below an inner side opening of the fire introduction channel 3h, the fire introduction table 31f can shorten a fire transfer distance between the fire introduction channel 3h and the first fire cover 8, and the fire introduction table 31f can effectively prevent fuel gas of the fire introduction channel 3h from being diluted by external cold air, the gas concentration of the ignition platform 31f is ensured, meanwhile, the applicability of the ignition channel 3h to the opening degree of the air door is enhanced, namely, the ignition performance can be ensured under the condition of larger opening degree of the air door, the inner ring wall 3f abuts against the inner ring wall surface 21 of the second gas mixing chamber 2, ingeniously, in order to avoid adding other connecting mechanisms in the structure of the second ignition cover 3 or the second gas mixing chamber 2, the inner ring wall surface 21 of the second gas mixing chamber 2 is provided with the abutting platform 211 which is matched with the structure of the ignition platform 31f and can abut against the ignition platform, and the abutting platform 211 is connected with the ignition platform 31f into a whole through a fastening piece 213 which penetrates through the abutting platform 211 from bottom to top, so that the fixed connection of the first ignition cover 8 and the base 7 as well as the second ignition cover 3 and the second gas mixing chamber 2 is realized, and when a stove head is cleaned by a user, the user only needs to integrally take the first ignition cover 8 and the base 7, the second ignition cover 3h as a result that the first ignition cover 8 and the base 7, the inner ring and the second ignition cover are not easy to take the stove head into a whole, The relative position of the second fire cover 3 and the second gas mixing chamber 2 is misplaced, so that the maintenance rate can be effectively reduced.

Example 4

The structure is basically the same as that of example 3, and the only difference is that: mix more evenly to improving the primary air/gas mixture that first penetrates pipe 9, the connecting seat 730 that first fire lid 8 corresponds, except the effect of connecting first fire lid 8, it still has the flame that can make the upper air inlet burner short, even and powerful, can not appear yellow flame, defect such as tempering, specifically as follows: the connecting seat 730 is substantially L-shaped, and includes a transverse portion 7301 connected to the C-shaped inner wall and a vertical portion 7302 extending upward, the air outlet 41 of the first injecting pipe 9 is located below the transverse portion 7301, and correspondingly, the transverse portion 7301 gradually inclines upward along the airflow direction of the first injecting pipe 9 from bottom to top. Wherein the connecting seat 730 can guide the gas flowing out from the gas outlet 41 of the first injecting pipe 9 to the through hole 81 and the central area of the top of the first fire cover 8 besides the foolproof function, the part of the vertical part 7302 is equivalent to the increase of the length of the first injecting pipe 9, meanwhile, the gas and the primary air can be mixed more uniformly and then flow into the through hole 81 and the central area of the top of the first fire cover 8, the ignition success rate is improved while the gas and the primary air can be prevented from being converged in different directions and colliding with each other, the gas and the primary air can be directly diffused uniformly from the central area of the top of the first fire cover 8 to the periphery, so that the diffusion is uniform, and finally the fire area of the first fire cover 8 can keep stable and uniform flame, thereby the flame of the upper air inlet is short, uniform and powerful, and the defects of yellow flame, tempering and the like can not occur.

Example 5

As shown in fig. 21, the structure is basically the same as that of embodiment 4, and the only difference is that: on the basis of improving the ejection capacity of the first injection pipe 9, the ejection capacity of the second injection pipe 4 needs to be improved, in order to avoid the decrease of kinetic energy caused by the pressure reduction of the gas in the first injection pipe 9 from the gas inlet 42 to the gas outlet 41, the inner cavity of the first injection pipe 9 of the embodiment is sequentially provided with a horn section 93 and a diffusion section 94 along the airflow direction from the gas inlet 42 to the gas outlet 41, the horn section 93 is located in the second gas mixing chamber 2 and located at the downstream of the gas outlet 41 of the second injection pipe 4, and the horn section 93 is higher than the gas outlet 41 of the second injection pipe 4 and lower than the uniform flow plate. The horn section 93 is higher than the air outlet 41 of the second injection pipe 4 and lower than the uniform flow plate, so that the gas can be accelerated between the horn section and the second injection pipe 4, and the gas flows to the second gas mixing chamber 2 with larger power, so that the fire outlet area of the second fire cover 3 corresponding to the second injection pipe 4 can keep stable and uniform flame.

Example 6

As shown in FIGS. 22 to 25, the structure is basically the same as that of the embodiment 5, and the only difference is that: the blockage of the first ejector 10 opposite to the first injection pipe 9 by the overflowing liquid is avoided, wherein the first ejector 10 is limited on the first injection seat 100, the first injection seat 100 is provided with a first supporting part 1001 for supporting the second gas mixing chamber 2, the outer ring wall surface of the second gas mixing chamber 2 extends downwards to form a circle of skirt 220, the skirt 220 is provided with a notch 2201 for air supplement corresponding to the first injection seat 100, the overflowing liquid can be blocked outside the first injection seat 100 through the skirt 220, and simultaneously, the notch 2201 can promote the primary air to enter the first ejector 10 better, improve the ejection rate of the primary air, of course, in order to increase the primary air induction rate of the second injection pipe 4, a notch 2201 for supplying air may be injected in the second injection seat 1000 of the skirt 220 corresponding to the second injection pipe 4, and similarly, the second injection seat 1000 may also be provided with a second support portion 1002 for supporting the second air mixing chamber 2.

Example 7

As shown in fig. 26 and 27, the structure is basically the same as that of embodiment 6, and the only difference is that: in order to improve the combustion heat efficiency of the second fire cover 3, the second fire cover 3 of the embodiment comprises a fire cover body, the annular peripheral wall 3e of the fire cover body is circumferentially provided with main fire holes 3a and first flame stabilizing holes 3b sequentially arranged in a staggered manner with the main fire holes 3a, and the annular peripheral wall 3e is circumferentially provided with grooves 3c intersecting with the main fire holes 3a and the first flame stabilizing holes 3b, wherein the first flame stabilizing holes 3b are used for stabilizing the main fire holes 3a, and the grooves 3c intersecting with the main fire holes 3a and the first flame stabilizing holes 3b can form a stabilized part, so that a circle of fire outlet ring can be formed, and the combustion efficiency of the second fire cover 3 can be obviously improved while stabilizing the main fire holes 3 a. The annular perisporium 3e of second fire lid 3 still sets up second steady flame hole 3d in the lower row of first steady flame hole 3b, and the contained angle alpha of the central line of second steady flame hole 3d and the central line of recess 3c is the acute angle, and wherein main flame hole 3a still has second steady flame hole 3d, can play dual steady flame effect to main flame hole 3a together with first steady flame hole 3b, and in addition, the second steady flame hole 3d does not lie in with the crossing reason of recess 3 c: the second flame stabilizing hole 3d can serve as a second row of main flame holes 3a to improve the combustion heat efficiency of the second flame cover 3, the included angle alpha between the second flame stabilizing hole 3d and the groove 3c is an acute angle, the air outlet speed of the second flame stabilizing hole 3d can be reduced in a hedging manner to improve the flame stabilizing effect, finally, in order to better supplement secondary air to the second flame stabilizing hole 3d, the skirt 220 is gradually inclined towards the second flame stabilizing hole 3d from bottom to top, a vertical bending edge which forms a step with the annular peripheral wall 3e is arranged under the position close to the second flame stabilizing hole 3d, the skirt 220 is inclined towards the second flame stabilizing hole 3d from bottom to top to better enable the secondary air to be attached to the root of the second flame stabilizing hole 3d for supplement, and because the vertical bending edge can generate an air vortex in the supplementing process, the air vortex can roll more air to enter the flame root of the second flame stabilizing hole 3d, make the supplementary air more abundant, promote combustion efficiency and reduce the flue gas.

Example 8

The structure is basically the same as that of the embodiment 6, and the only difference is that: a protection seat 1a for an ignition needle and/or a thermocouple is added, wherein the mounting seat 1 of the embodiment is further provided with a connecting part 40 for connecting the first gas mixing chamber 80 and the second gas mixing chamber 2, and the connecting part 40 is provided with at least one through hole 81 corresponding to the ignition needle and/or the thermocouple; and a limit seat 1b disposed on a lower surface of the connection portion 40, wherein the limit seat 1b includes an outer wall, the outer wall defines a cavity for accommodating the protection seat 1a, and a lower peripheral edge of the outer wall is at least abutted against an outer surface of the protection seat 1a, wherein a height of the outer wall of the limit seat 1b and the protection seat 1a can compensate a portion of the outer wall, which blocks an exposed portion of the ignition needle and/or the thermocouple, such that the exposed portion of the ignition needle and/or the thermocouple is less to perform a protection function, thereby preventing a user from easily colliding with the ignition needle and/or the thermocouple during a cleaning process, improving an ignition or fire protection success rate, and reducing a maintenance rate of the ignition needle and/or the thermocouple.

Claims (31)

1. Burner fire cover for gas cookers, comprising a first fire cover (8), characterized in that: the first fire cover (8) comprises an annular peripheral wall, the annular peripheral wall comprises a first wall part which is partially retracted inwards along the radial direction, and at least one through hole (81) is formed in the first wall part corresponding to the ignition needle and/or the thermocouple.

2. Burner fire cover for gas cookers according to claim 1, characterized in that: the annular peripheral wall includes a C-shaped outer annular wall (82) and a C-shaped connecting wall (83) connecting end portions (800) of the C-shaped outer annular wall (82), and the C-shaped connecting wall (83) is the first wall portion.

3. Burner fire cover for gas cookers according to claim 2, characterized in that: the C-shaped connecting wall (83) is further provided with a first auxiliary ignition hole (831a) and a second auxiliary ignition hole (831b), and the center lines of the first auxiliary ignition hole (831a) and the second auxiliary ignition hole (831b) are intersected.

4. Burner fire cover for gas cookers according to claim 3, characterized in that: the end point portion (800) of the C-shaped connecting wall (83) is further provided with a third auxiliary ignition hole (831C) and a fourth auxiliary ignition hole (831d), a circle of vertical wall surface (86) extends outwards in the radial direction of the C-shaped outer ring wall (82) of the first fire cover (8), a flame stabilizing groove (87) for stabilizing flame is formed between the vertical wall surface (86) and the C-shaped outer ring wall (82), the flame stabilizing groove (87) corresponds to the expanding portion (871) of the third auxiliary ignition hole (831C) and the fourth auxiliary ignition hole (831d) in position, the width of the expanding portion (871) is locally widened in the radial direction, and the third auxiliary ignition hole (831C) and the fourth auxiliary ignition hole (831d) are communicated with the expanding portion (871) respectively.

5. Burner fire cover for gas cookers according to claim 4, characterized in that: the positions of the top wall (84) of the first fire cover (8) corresponding to the through hole (81) and the auxiliary ignition hole (831) are provided with a first-stage waterproof eaves (85a) and a second-stage waterproof eaves (85b) which respectively extend outwards along the radial direction of the first fire cover (8), and the lowest point of the second-stage waterproof eaves (85b) is higher than that of the first-stage waterproof eaves (85 a).

6. Burner fire cover for gas cookers according to claim 5, characterized in that: the vertical wall surface (86) is provided with a notch (8311) which is recessed from bottom to top at the position corresponding to the through hole (81) and the auxiliary ignition hole (831), the lowest end of the notch (8311) is higher than the through hole (81), and the part of the vertical wall surface (86) provided with the notch (8311) forms the first-stage waterproof eaves (85 a).

7. Burner fire cover for gas cookers according to claim 6, characterized in that: the first fire cover (8) comprises a first main fire hole (88) and a flame stabilizing hole (89) which simultaneously penetrate through the C-shaped outer ring wall (82) and the vertical wall surface (86), and the flame stabilizing groove (87) penetrates through the first main fire hole (88) and the flame stabilizing hole (89).

8. Burner fire cover for gas cookers according to claim 7, characterized in that: the first fire cover (8) comprises second main fire holes (90) which are arranged along the circumferential direction of the C-shaped outer ring wall (82) at intervals, and the fire outlet diameter of each second main fire hole (90) is smaller than that of each first main fire hole (88).

9. The burner fire cover for a gas range as set forth in any one of claims 1 to 8, wherein: be provided with in first fire lid (8) and be used for fixing a position reference column (91) of first fire lid (8), reference column (91) have vertical hole (911) of seting up vertically and with horizontal hole (912) that through-hole (81) are linked together, the diameter of horizontal hole (912) is less than the diameter of through-hole (81).

10. The burner fire cover for a gas range as set forth in claim 9, wherein: the surface of the top wall (84) of the first fire cover (8) is at least partially recessed to form a liquid storage groove (841) for buffering overflowing liquid, and the top wall (84) of the first fire cover (8) is provided with an overflowing liquid outflow port (842) communicated with the liquid storage groove (841).

11. The burner fire cover for a gas range as set forth in any one of claims 3 to 8, wherein: and a first convex wall (832) and a second convex wall (833) respectively extend inwards in the radial direction on the C-shaped connecting wall (83) at positions corresponding to the first auxiliary ignition hole (831a) and the second auxiliary ignition hole (831 b).

12. Burner fire cover for gas cookers according to claim 11, characterized in that: the wall surfaces of the first convex wall (832) and the second convex wall (833) are respectively inclined towards the end point part (800) of the corresponding C-shaped connecting wall (83).

13. Burner fire cover for gas cookers according to claim 12, characterized in that: the C-shaped connecting wall (83) is further provided with a first mounting hole (830) for mounting a connecting piece (700), and the first mounting hole (830) and the through hole (81) are arranged at intervals.

14. A cooking appliance using a burner fire cover as defined in any one of claims 1 to 13, comprising a mounting base (1), characterized in that: the mounting seat (1) is further provided with:

a base (7), said base (7) being C-shaped, said base (7) comprising a C-shaped outer wall (71) and a C-shaped inner wall (73) connecting ends (72) of the C-shaped outer wall (71), and said C-shaped inner wall (73) enclosing a cavity (74) for accommodating an ignition needle and/or a thermocouple;

a first fire cover (8) covering the base (7) to form a first gas mixing chamber (80) in the center;

the air outlet (41) of the first injection pipe (9) is communicated with the first air mixing chamber (80); and

and the first ejector (10) is communicated with the air inlet (42) of the first injection pipe (9).

15. The cooktop of claim 14, wherein: the mounting seat (1) is further provided with:

the second gas mixing chamber (2) is arranged on the periphery of the mounting seat (1), the second gas mixing chamber (2) comprises an inner ring wall surface (21) and an outer ring wall surface (22) which are concentrically arranged at intervals and a bottom wall (23) for connecting the inner ring wall surface (21) and the outer ring wall surface (22), a second fire cover (3) covers the inner ring wall surface (21) and the outer ring wall surface (22), and the inner ring wall surface (21), the outer ring wall surface (22), the bottom wall (23) and the second fire cover (3) are jointly arranged in a surrounding mode to form the second gas mixing chamber (2);

the second injection pipe (4) is arranged on the mounting seat (1), and an air outlet (41) of the second injection pipe (4) is communicated with the second gas mixing chamber (2);

the second ejector (5) is arranged on the mounting seat (1) and communicated with an air inlet (42) of the second injection pipe (4); and

the flow equalizing plate (6) is arranged on the outer ring wall surface (22) of the second gas mixing chamber (2), is higher than the gas outlet (41) of the second injection pipe (4) and is used for equalizing gas flowing out of the second injection pipe (4), and the flow equalizing plate (6) is provided with a narrow part (61) adjacent to the gas outlet (41) of the second injection pipe (4).

16. The cooktop of claim 15, wherein: the flow equalizing plate (6) further comprises a wide part (62) which continues to flow from the narrow part (61) along the flow direction of the fuel, and the width ratio of the narrow part (61) to the wide part (62) is 2: 3.

17. The cooktop of claim 16, wherein: an included angle alpha is formed between the connecting line of the narrow part (61) and the wide part (62) and the center of the second air mixing chamber (2), and the alpha is more than or equal to 100 degrees and less than or equal to 150 degrees.

18. The cooktop of claim 17, wherein: the second injection pipe (4) is partially protruded out of the upper surface of the bottom wall (23) adjacent to the narrow part (61) of the uniform flow plate (6), and the protruded part (43) occupies 1/3 of the peripheral perimeter of the second gas mixing chamber (2).

19. The cooktop of claim 18, wherein: the part of the second air mixing chamber (2), which corresponds to the narrow part (61) of the second injection pipe (4) and is adjacent to the flow equalizing plate (6), and the part of the spacing part (20) between the part of the narrow part (61) of the second injection pipe (6) and the upper surface of the bottom wall (23) are higher than the bottom wall (23), and the higher part also accounts for 1/3 of the peripheral perimeter of the second air mixing chamber (2).

20. The cooktop of claim 15, wherein: the C-shaped inner wall (73) of the base (7) is provided with a connecting seat (730) extending upwards, the connecting seat (730) is provided with a second mounting hole (730a) corresponding to the first mounting hole (830), and the first fire cover (8) and the base (7) can be integrally connected under the condition that the connecting piece (700) is connected to the first mounting hole (830) and the second mounting hole (730 a).

21. The cooktop of claim 20, wherein: a nut seat is embedded in a second mounting hole (730a) of the connecting seat (730), and the connecting piece (700) is a screw and is in threaded connection with the nut seat.

22. The cooktop of claim 21, wherein: the connecting seat (730) is located between the first convex wall (832) and the second convex wall (833) of the first fire lid (8) for positioning the first fire lid (8).

23. The cooktop of claim 22, wherein: the highest point of the connecting seat (730) is lower than the through hole (81).

24. The cooktop of claim 23, wherein: the connecting seat (730) is approximately L-shaped and comprises a transverse part (7301) connected with the C-shaped inner wall (73) and a vertical part (7302) extending upwards, the air outlet (41) of the first injection pipe (9) is positioned below the transverse part (7301), correspondingly, the transverse part (7301) is gradually inclined upwards from bottom to top along the airflow direction of the first injection pipe (9).

25. The cooktop of claim 24, wherein: the inner chamber of first drawing and penetrating pipe (9) is along the air current direction of admitting air mouth (42) to gas outlet (41), is loudspeaker section (93) and diffuser section (94) in proper order, loudspeaker section (93) are located in second mixes the gas chamber (2) and is located the second draws the low reaches department of gas outlet (41) of penetrating pipe (4), loudspeaker section (93) are higher than gas outlet (41) of penetrating pipe (4) are drawn to the second and are less than even flow board (6).

26. The cooktop of claim 25, wherein: the first ejector (10) is limited on a first ejector seat (100), a first supporting part (1001) used for supporting the second air mixing chamber (2) is arranged on the first ejector seat (100), a circle of skirt (220) extends downwards from the outer ring wall surface (22) of the second air mixing chamber (2), and the skirt (220) is provided with a gap (2201) for air supplement corresponding to the first ejector seat (100).

27. The cooktop of claim 26, wherein: the second fire cover (3) is including fire cover body, the annular perisporium (3e) of fire cover body be equipped with main fire hole (3a) along circumference and with first steady flame hole (3b) of main fire hole (3a) staggered arrangement in proper order, and annular perisporium (3e) still seted up circumferentially with main fire hole (3a) and the crossing recess (3c) of first steady flame hole (3 b).

28. The cooktop of claim 27, wherein: and a second flame stabilizing hole (3d) is further formed in the lower row of the first flame stabilizing hole (3b) of the annular peripheral wall (3e) of the second flame cover (3), and an included angle alpha between the central line of the second flame stabilizing hole (3d) and the central line of the groove (3c) is an acute angle.

29. The cooktop of claim 28, wherein: the skirt (220) is gradually inclined towards the second flame stabilizing hole (3d) from bottom to top, and a retraction area (2202) is formed by locally and radially retracting inwards under the second flame stabilizing hole (3 d).

30. The cooktop of claim 29, wherein: the second fire cover (3) is an annular fire cover body and comprises an inner annular wall (3f) and an annular top wall (3g), wherein the inner annular wall (3f) is arranged at an interval with the annular peripheral wall (3e), the annular top wall (3g) is connected with the inner annular wall (3f) and the annular peripheral wall (3e), a fire ignition channel (3h) is arranged on the annular top wall (3g) of the fire cover body along the radial direction, an air inlet hole (31h) communicated with the second air mixing chamber (2) is formed in the bottom of the fire ignition channel (3h), and a fire ignition platform (31f) extending towards the central direction of the first fire cover (8) is arranged at the position, below an inner side opening of the fire ignition channel (3h), of the inner annular wall (3 f).

31. The cooktop of claim 30, wherein: the inner ring wall (3f) abuts against an inner ring wall surface (21) of the second gas mixing chamber (2), correspondingly, the inner ring wall surface (21) is provided with an abutting table (211) abutting against the ignition table (31f), and is connected with the ignition table (31f) into a whole through a fastener (213) penetrating through the abutting table (211) from bottom to top.

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