CN116906898A - Burner and gas stove - Google Patents

Abstract

The application belongs to the technical field of combustion, and particularly discloses a combustor and a gas stove. The burner comprises a gas distribution seat and a fire cover, wherein the gas distribution seat and the fire cover comprise a plurality of grooves formed in one of the fire cover and the gas distribution seat, the fire cover is buckled on the gas distribution seat and surrounds the gas distribution seat to form a gas mixing cavity, the grooves are matched with the wall surface of the other one of the fire cover and the gas distribution seat to form fire holes, and the plurality of fire holes are arranged at intervals along the circumferential direction of the fire cover and extend along the radial direction of the fire cover and are communicated with the gas mixing cavity; the lower end face of the fire cover is provided with convex teeth which are downwards convex, the convex teeth are arranged between every two adjacent fire holes, and the lower ends of the convex teeth are lower than the adjacent fire holes. The gas stove comprises the burner. The burner and the gas stove disclosed by the application can control the combustion speed, reduce the combustion temperature and reduce the nitrogen oxides generated by combustion.

Description

Burner and gas stove

Technical Field

The application relates to the technical field of combustion, in particular to a combustor and a gas stove

Background

The gas stove is a common kitchen appliance which adopts the combustion of combustible gas to realize the heating of the appliance or the cooking of food, when the gas stove works, the gas enters the gas stove from the gas inlet pipe, enters the furnace end after being regulated by the regulating valve, and is mixed with a part of air at the same time, and the mixed gas is ignited by the ignition device and is sprayed out from the fire hole to form flame after entering the burner.

The burner generally comprises a nozzle, a venturi type injection pipe, a burner with a mixing cavity and a distributor, wherein an inner ring fire cover and an outer ring fire cover sleeved outside the inner ring fire cover are arranged above the distributor. The air ejected by the ejector pipe and the combustible gas supplied by the nozzle flow are mixed in the mixing cavity to form combustible mixed gas, and the combustible mixed gas is distributed by the distributor and then burnt in the fire holes of the outer ring fire cover and/or the inner ring fire cover. Meanwhile, a secondary air channel is arranged on the distributor, so that a secondary space required by combustion is continuously provided for the combustible mixed gas.

The existing burner generally adopts a Venturi injection pipe to absorb air to form combustible mixed gas, when the combustion speed of the combustible mixed gas is high, air tempering phenomenon is easy to occur, the combustible mixed gas is burnt in the injection pipe or the mixed gas cavity, the damage of other parts in the burner and even a gas stove is caused, and safety accidents such as gas leakage and the like are easy to occur; meanwhile, when the fuel gas is the fuel gas with high combustion speed, the premixed fuel gas is distributed through the gas distributing seat and then combusted, the temperature of combustion flame is increased, so that nitrogen oxides generated by combustion can be increased, pollutant emission is increased, and the use safety of the gas stove is affected.

Disclosure of Invention

One of the technical problems to be solved by the application is to provide a burner which can effectively solve the problems of tempering and high nitrogen oxide content caused by over-high combustion speed and over-high flame temperature of the existing burner, and improve the use stability, reliability and safety of the burner.

The application aims to provide a gas stove which can effectively solve the problems of high energy consumption and large pollutant discharge amount caused by too high combustion speed of combustible mixed gas in the existing gas stove, reduce the energy consumption of the gas stove and improve the use safety of the gas stove.

The first technical problem is solved by the following technical scheme:

the burner comprises a gas distribution seat and a fire cover, wherein a plurality of grooves are formed in one of the fire cover and the gas distribution seat, the fire cover is buckled on the gas distribution seat to form a gas mixing cavity, a plurality of fire holes are formed by matching a plurality of grooves in one of the fire cover and the gas distribution seat with the wall surface of the other of the fire cover and the gas distribution seat, the plurality of fire holes are arranged at intervals along the circumferential direction of the fire cover and extend along the radial direction of the fire cover, and the fire holes are communicated with the gas mixing cavity;

the lower end face of the fire cover is provided with convex teeth which are downwards convex, the convex teeth are arranged between every two adjacent fire holes, and the convex teeth are positioned on the outer side of the installation part and downwards protrude out of the fire holes.

Compared with the background technology, the burner provided by the application has the beneficial effects that: the gas distribution seat and the fire cover are buckled to form the gas mixing cavity and the fire hole, so that the processing of the fire hole can be simplified, the processing difficulty and the processing cost of the fire cover can be reduced, the thickness requirement on the fire cover can be reduced, the weight of the burner can be reduced, and the material cost of the burner can be reduced; through setting up the protruding tooth that the lower extreme is less than adjacent fire hole, can dispel the heat when the fire hole outer end fires burning, reduce flame combustion temperature to slow down the combustion rate of combustible mixed gas, reduce the content of nitrogen oxide in the flue gas, thereby reduce the pollutant that the combustor burns and discharges, improve the safety in utilization of combustor, simultaneously, through the reduction of combustion rate, can slow down or avoid backfire phenomenon's emergence, further improve the safety in utilization of combustor; furthermore, the provision of the convex teeth is also beneficial to controlling the width of the secondary air passage for providing secondary air for the fire hole, thereby better controlling the temperature of the flame and further inhibiting the nitrogen oxides generated in the combustion process.

In one embodiment, the recess is provided in the fire cover.

In one embodiment, the outer end of the groove is in an outward flaring structure;

and/or the width of the outer end of the groove is more than 2mm and less than 10mm;

and/or the groove depth of the groove is less than or equal to 1mm.

In one embodiment, the distance between the lower end surface of the convex tooth and the fire hole is greater than or equal to 1mm;

and/or the width of the convex teeth along the circumferential direction of the fire cover is larger than the width of the fire hole;

and/or the width of the convex teeth along the circumferential direction of the fire cover is equal to the interval between two adjacent fire holes.

In one embodiment, the upper surface of the fire cover is convexly provided with a plurality of protruding parts, and the protruding parts are arranged at intervals.

In one embodiment, the fire cover comprises an outer ring fire cover, the fire hole comprises an outer fire hole, the gas distribution seat is provided with an annular outer mounting part, the outer ring fire cover is buckled at the upper end of the outer mounting part and surrounds the outer mounting part to form the gas mixing cavity, one of the outer ring fire cover and the outer mounting part is provided with a plurality of grooves, the other of the outer ring fire cover and the outer mounting part is matched with the grooves to form the outer fire hole, the outer ring fire cover is provided with the convex teeth, and the lower ends of the convex teeth on the outer ring fire cover are lower than the outer fire hole;

and/or, the fire cover comprises an inner ring fire cover, the fire hole comprises an inner fire hole, the gas distributing seat is provided with an inner installation part which is coaxially arranged with the inner ring fire cover, the inner ring fire cover is buckled on the upper end face of the inner installation part and is formed with the gas mixing cavity by surrounding the upper end face of the inner installation part, one of the inner ring fire cover and the inner installation part is provided with a plurality of grooves, the other one of the inner ring fire cover and the grooves are matched with each other to form the fire hole, the inner ring fire cover is provided with convex teeth, and the lower ends of the convex teeth on the inner ring fire cover are lower than the inner fire hole.

In one embodiment, the inner periphery of the outer ring fire cover is upwardly protruded with an inner blocking edge part, and the outer periphery of the outer ring fire cover is upwardly protruded with an outer blocking edge part;

the outer periphery of the inner ring fire cover is upwards protruded with an outer blocking edge part.

The second technical problem is solved by the following technical scheme:

the gas stove comprises an energy collecting disc and supporting legs for supporting the energy collecting disc, and the gas stove comprises the burner, wherein the burner is arranged on the inner side of the energy collecting disc and is arranged at intervals with the energy collecting disc.

Compared with the background technology, the gas stove has the beneficial effects that: by adopting the burner, the flame combustion speed can be better controlled, the flame combustion temperature is suppressed, the content of nitrogen oxides generated by combustion is reduced, the use safety and reliability of the gas stove are improved, the use energy consumption of the gas stove is reduced, and the energy conservation and emission reduction of the gas stove are better realized.

In one embodiment, the fire cover comprises an outer ring fire cover, the outer ring fire cover is provided with the convex teeth, and the distance between the convex teeth on the outer ring fire cover and the inner side surface of the energy collecting disc is smaller than 15mm.

In one embodiment, the fire cover comprises an outer ring fire cover, and a secondary air channel is formed between the outer side wall of the air distribution seat and the inner side wall of the energy collecting disc;

the outer diameter of the outer side wall of the gas distribution seat is R ₁ The radius of the inner side wall of the energy collecting disc is R ₂ The secondary air passage has a passage area S,

the outlet area of a single fire hole on the outer ring fire cover is set to be S1, and the number of the fire holes on the outer ring fire cover is N, wherein S is more than or equal to 2N S1.

Drawings

FIG. 1 is a schematic view of a disassembly structure of a burner according to a first embodiment of the present application;

FIG. 2 is a cross-sectional view of a burner according to an embodiment of the present application from one perspective;

FIG. 3 is an enlarged view of a portion of the portion I of FIG. 2;

FIG. 4 is a cross-sectional view of a burner according to an embodiment of the present application from another perspective;

FIG. 5 is an enlarged view of a portion of J in FIG. 4;

FIG. 6 is a schematic view of the back structure of an inner ring fire cover according to a first embodiment of the present application;

FIG. 7 is a schematic front view of an inner ring fire cover according to an embodiment of the application;

fig. 8 is a schematic view of a back structure of an outer ring fire cover according to a first embodiment of the present application;

FIG. 9 is a schematic front view of an outer ring fire cover according to an embodiment of the present application;

FIG. 10 is a cross-sectional view of a gas distribution base according to a first embodiment of the present application;

FIG. 11 is a partial cross-sectional view of a gas stove according to a second embodiment of the present application;

FIG. 12 is a schematic view of the structure at K in FIG. 11;

fig. 13 is a schematic diagram of the structure at L in fig. 12.

Description of the reference numerals:

100. a burner; 200. a stove panel; 300. a pot holder assembly; 301. an energy collecting disc; 302. a support leg; 400. a water receiving tray; 500. a secondary air passage;

1. a fire cover; 1a, an outer ring fire cover; 1b, an inner ring fire cover; 1b1, an internal gas mixing tank; 11. a fire cover body; 111. a groove; 111a, an outer groove; 111b, an inner groove; 1111. a communicating groove portion; 1112. an air outlet groove portion; 12. convex teeth; 12a, outer convex teeth; 12b, inner teeth; 13. an outer flange portion; 14. an inner flange portion; 15. a mounting convex part; 16. a boss; 17. positioning column parts; 18. an inner positioning ring portion;

2. an air dividing seat; 21. a mounting part; 21a, an outer mounting portion; 21a1, an external air mixing tank; 21a2, mounting slots; 21b, an inner mounting portion; 21b1, an inner vent; 21b2, positioning holes; 22. a connecting bridge portion; 221. an outer vent; 23. a partition cylinder portion; 24. an inner premix chamber; 25. an outer premix chamber; 26. a mounting flange portion;

3. a burner; 31. a mounting plate section; 32. an inner ring portion; 33. an outer ring portion; 34. an injection channel; 34a, outer ring injection channel; 34b, inner ring injection channel;

4. a threaded fastener; 4a, an external threaded fastener; 4b, an internal threaded fastener; 5. a screw.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be understood that the terms "center," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, the embodiment of the application provides a burner 100, and the burner 100 provided in the embodiment can be used in a gas stove to realize ignition combustion of gas, thereby realizing heating of a cooking appliance.

As shown in fig. 2 to 5, the burner 100 comprises a gas distributing seat 2 and a fire cover 1, wherein one of the fire cover 1 and the gas distributing seat 2 is provided with a plurality of grooves 111, the fire cover 1 is buckled on the gas distributing seat 2 and is surrounded by a mixed gas cavity, the grooves 111 are matched with the wall surface of the other one of the fire cover 1 and the gas distributing seat 2 to form fire holes, the plurality of fire holes are arranged at intervals along the circumferential direction of the fire cover 1 and extend along the radial direction of the fire cover 1, and the fire holes are communicated with the mixed gas cavity; the lower end face of the fire cover 1 is provided with convex teeth 12 which are downwards convex, convex teeth 12 are arranged between two adjacent fire holes, and the lower ends of the convex teeth 12 are lower than the adjacent fire holes.

According to the burner 100 provided by the embodiment, the gas distribution seat 2 is buckled with the fire cover 1 to form the gas mixing cavity and the fire hole, so that the processing of the fire hole can be simplified, the processing difficulty and the processing cost of the fire cover 1 can be reduced, the thickness requirement on the fire cover 1 can be reduced, the weight of the burner 100 can be reduced, and the material cost of the burner 100 can be reduced; through the arrangement of the convex teeth 12 with the lower ends lower than the adjacent fire holes, heat dissipation can be carried out when the fire holes are burnt at the outer ends of the fire holes, the flame burning temperature is reduced, so that the burning speed of combustible mixed gas is slowed down, the content of nitrogen oxides in smoke is reduced, the pollutant discharged by the burner 100 during burning is reduced, the use safety of the burner 100 is improved, meanwhile, the occurrence of tempering phenomenon can be slowed down or avoided through the reduction of the burning speed, and the use safety of the burner 100 is further improved; furthermore, by providing the teeth 12, it is also advantageous to control the width of the secondary air passage for providing secondary air to the fire holes, thereby better controlling the temperature of the flame and further suppressing nitrogen oxides generated during combustion.

The gas distributing seat 2 is provided with a mounting portion 21 for being in snap fit with the fire cover 1, and in one embodiment, the mounting portion 21 includes an inner mounting portion 21b and an outer mounting portion 21a, the outer mounting portion 21a is annularly arranged and is sleeved outside the inner mounting portion 21b at intervals. The fire cover 1 comprises an inner ring fire cover 1b and an outer ring fire cover 1a, wherein the fire holes comprise inner fire holes and outer fire holes, the inner ring fire cover 1b is buckled on an inner installation part 21b and surrounds the mixed air cavity with the inner installation part 21b, one of the inner ring fire cover 1b and the inner installation part 21b is provided with a plurality of grooves 111, the other one is matched with the grooves 111 to form an inner fire hole, the inner ring fire cover 1b is provided with convex teeth 12, and the lower ends of the convex teeth 12 on the inner ring fire cover 1b are lower than the inner fire holes; the outer ring fire cover 1a is buckled on the outer mounting part 21a and is surrounded with the outer mounting part 21a to form a mixed air cavity, one of the outer ring fire cover 1a and the outer mounting part 21 is provided with a plurality of grooves 111, the other is matched with the grooves 111 to form an outer fire hole, the outer ring fire cover 1a is provided with convex teeth 12, and the lower ends of the convex teeth on the outer ring fire cover 1a are lower than the outer fire hole.

That is, the inner ring fire cover 1b and the outer ring fire cover 1a are provided with the convex teeth 12, and the fire holes at the inner ring fire cover 1b and the outer ring fire cover 1a are formed by surrounding the corresponding mounting parts 21, so that the structures of the inner ring fire cover 1b and the outer ring fire cover 1a on the burner 100 are relatively consistent, the processing of the burner 100 is simplified, and nitrogen oxides generated by the fire hole combustion on the inner ring fire cover 1b and the fire hole combustion on the outer ring fire cover 1a can be simultaneously restrained, so that the use safety of the burner 100 is further improved.

In another embodiment, the mounting portion 21 may include an inner mounting portion 21b and an outer mounting portion 21a, the fire cover 1 includes an inner ring fire cover 1b and an outer ring fire cover 1a, the inner ring fire cover 1b is fastened on the inner mounting portion 21b and forms a fire hole and a mixing cavity around the inner mounting portion 21b, and the inner ring fire cover 1b is provided with the protruding teeth 12. The outer ring fire cover 1a and the outer ring fire cover 1a can be installed on the outer installation portion 21a by referring to the arrangement in the prior art, that is, the outer ring fire cover 1a is provided with an outer fire hole, and the upper end of the outer installation portion 21a is provided with an outer air mixing cavity.

In another embodiment, the fire cover 1 comprises an inner ring fire cover 1b and an outer ring fire cover 1a, the outer ring fire cover 1a is buckled on the outer mounting part 21a, a fire hole and a mixing cavity are formed around the outer mounting part 21a, and the outer ring fire cover 1a is provided with convex teeth 12. The inner ring fire cover 1b and the inner ring fire cover 1b may be installed on the inner installation portion 21b by referring to the arrangement in the prior art, that is, the inner ring fire cover 1b is provided with an inner fire hole, and the upper end of the inner installation portion 21b is provided with an inner air mixing cavity, and the inner fire hole is communicated with the corresponding inner air mixing cavity.

For convenience of the following description, the air mixing cavity formed by the outer ring fire cover 1a and the outer mounting part 21a is called an outer air mixing cavity, and the convex teeth 12 on the outer ring fire cover 1a are called convex teeth 12a; the gas mixing chamber formed by the inner ring flame cover 1b and the inner mounting portion 21b is referred to as an inner gas mixing chamber, and the teeth 12 on the inner ring flame cover 1b are referred to as inner teeth 12b.

In an embodiment, an outer air mixing groove 21a1 with an upper opening is formed on the outer mounting portion 21a, and an outer air mixing cavity is formed by surrounding the groove wall of the outer air mixing groove 21a1 and the lower end face of the outer ring fire cover 1a, wherein the outer air mixing cavity is annular. From this can simplify the structure setting of outer ring fire lid 1a, reduce the thickness demand of outer ring fire lid 1a, and avoid the thickness of outer ring fire lid 1a to restrict the degree of depth of outer mixed gas chamber, improve the volume of the flammable mixed gas of outer mixed gas chamber to improve the flammable mixed gas supply volume to outer fire hole, guarantee the firepower of outer fire hole.

Further, an inner air mixing groove 1b1 is formed in the lower end face of the inner ring fire cover 1b, and the groove wall of the inner air mixing groove 1b1 and the upper end face of the inner mounting portion 21b1 are surrounded to form the inner air mixing cavity.

In other embodiments, the lower end surface of the outer ring fire cover 1a may be provided with an outer air mixing groove 21a1, the groove wall of the outer air mixing groove 21a1 and the upper end surface of the outer mounting portion 21a are surrounded to form the outer air mixing cavity, or the lower end surface of the outer ring fire cover 1a and the upper end surface of the outer mounting portion 21a are both provided with the outer air mixing groove 21a1, and the two outer air mixing grooves 21a1 together form the outer air mixing cavity. In another embodiment, the inner mounting portion 21b or the inner air mixing groove 1b1 may be provided in both the inner mounting portion 21b and the inner lid 1b.

In an embodiment, the fire cover 1 comprises a fire cover body 11, wherein the lower end surface of the fire cover body 11 is attached to the upper end surface of the mounting part 21, a plurality of grooves 111 are formed in the lower end surface of the fire cover body 11 along the circumferential direction, and the bottoms of the grooves 111 and the upper end surface of the mounting part 21 are surrounded to form fire holes; or the fire cover 1 comprises a fire cover body 11, the lower end surface of the fire cover body 11 is attached to the upper end surface of the mounting part 21, a plurality of grooves 111 are formed in the upper end surface of the mounting part 21 along the circumferential direction, and fire holes are formed in the periphery of the bottoms of the grooves 111 and the lower end surface of the fire cover body 11. By forming the grooves 111 on the lower end surface or the lower end surface of the fire cover 1 to form the fire holes, the fire holes are convenient to process and form, the processing cost is low, the forming difficulty is low, the processing of the fire cover 1 or the gas distributing seat 2 is simplified, and the cost of the burner 100 is reduced.

In an embodiment, the lower end surface of the outer ring fire cover 1a is provided with a groove 111 for forming an outer fire hole, the inner ring fire cover 1b is provided with a groove 111 for forming an inner fire hole, so that the groove 111 and the convex teeth 12 are arranged on the fire cover 1, the position relationship between the convex teeth 12 and the groove 111 is controlled, the problem that the groove 111 and the convex teeth 12 partially overlap in the circumferential direction of the fire cover 1 due to assembly errors when the groove 111 is arranged on the gas distributing seat 2 is avoided, the combustion of flames at the fire hole is influenced by the arrangement of the convex teeth 12 is avoided, and the assembly process between the fire cover 1 and the gas distributing seat 2 is simplified.

In another embodiment, the outer mounting portion 21a may be provided with a groove 111 for forming an outer fire hole, and/or the inner mounting portion 21b may be provided with a groove 111 for forming an inner fire hole, so that the positioning structure is provided on the fire cover 1 and the mounting portion 21 to ensure that the teeth 12 and the fire hole are arranged in a staggered manner in the circumferential direction.

For convenience of description, the groove 111 on the outer ring fire cover 1a is referred to as an outer groove 111a, and the groove 111 on the inner ring fire cover 1b is referred to as an inner groove 111b.

The cross section of the fire hole is preferably rectangular, namely, the cross section of the groove 111 is rectangular, so that the processing convenience of the groove 111 can be improved, the processing process of the fire cover 1 can be simplified, and the processing cost can be reduced. In other embodiments, the cross section of the fire hole may be circular, arc-shaped or trapezoid, and if the cross section of the fire hole is circular, the installation portion 21 and the fire cover 1 are both provided with grooves 111.

As shown in fig. 5 to 9, in one embodiment, in order to improve the combustion sufficiency and ensure the combustion firepower, the outer end of the groove 111 is preferably in a flaring structure flaring outwards, so that the size of the air outlet of the fire hole can be increased on the basis of unchanged size of the inner end of the fire hole, and the air outlet uniformity is improved; meanwhile, the arrangement of the fire hole outlet of the flaring structure is also beneficial to slowing down the flow rate of the combustible mixed gas when the combustible mixed gas flows out of the fire hole, so that the combustion speed of the combustible mixed gas is slowed down, the flame temperature is better controlled, and nitrogen oxides generated in the combustion process are inhibited; furthermore, the arrangement of the fire hole outlet with the flaring structure can also avoid the problems of backfire, unstable flame or flameout caused by the fact that the air is sucked into the fire hole by forming larger negative pressure at the fire hole outlet, and improve the combustion stability.

In an embodiment, the fire hole includes a communicating groove 1111 and an air outlet groove 1112, which are radially communicated with each other along the fire cover 1, the air outlet groove 1112 is located at the outer side of the communicating groove 1111, the width of the air outlet groove 1112 is gradually increased from inside to outside, and the width of the communicating groove 1111 is equal to the minimum width of the air outlet groove 1112, i.e. the air outlet groove 1112 forms the flaring structure. This kind of setting is favorable to guaranteeing the export size of fire hole, when prolonging the length of fire hole, and avoids the import of fire hole too little and leads to the unsmooth problem of admitting air, improves the flow smoothness nature of combustible mixed gas in mixing chamber to the fire hole.

The width of the communicating groove 1111 is preferably 1mm to 2.5mm, which prevents the flow of air from being unsmooth due to too narrow width of the communicating groove 1111, and also prevents the flow of air from being too fast due to too large width of the communicating groove 1111, and balances the flow smoothness and flow speed of the combustible mixed gas, thereby better controlling the combustion speed of the combustible mixed gas.

The outlet width of the groove 1112 is preferably 2.5 mm-10 mm, that is, the width of the large end of the air outlet groove 1112 is preferably 2.5 mm-10 mm, and the taper of the air outlet groove 1112 is preferably 5 ° to 15 °, so as to avoid the problem that negative pressure is formed at the small end of the air outlet groove 1112 due to the overlarge taper of the air outlet groove 1112, and also avoid the problems of too slow airflow speed and too long requirement of the air outlet groove 1112 due to the overlarge taper.

The width of the convex teeth 12 in the circumferential direction of the fire cover 1 is equal to or smaller than the interval between two adjacent fire holes. In an embodiment, the protruding teeth 12 are overlapped along the groove side walls of the grooves 111 on two adjacent sides of the fire cover 1 respectively, that is, the width of the protruding teeth 12 in the circumferential direction of the fire cover 1 is equal to the distance between the two adjacent fire hole outlets, so that the protruding teeth 12 are arranged closer to the fire hole outlets, flame at the fire hole outlets is better limited between the two protruding teeth 12, the heat dissipation performance of the flame is improved, the flame burning speed and the burning temperature are suppressed, and the nitrogen oxide content generated by burning is better suppressed.

The inner and outer sides of the teeth 12 are preferably arc surfaces coaxially arranged with the fire cover body 11, and the diameter of the inner side of the teeth 12 is equal to or larger than the diameter of the outer side wall of the corresponding mounting portion 21, so that interference between the teeth 12 and the outer side wall of the mounting portion 21 after machining can be avoided. The diameter corresponding to the outer side surface of the convex tooth 12 is preferably the same as the outer diameter of the fire cover body 11, namely, the outer side surface of the convex tooth 12 is flush with the outer side surface of the fire cover body 11, so that the convex tooth 12 is prevented from protruding out of the outer side wall of the fire cover body 11 in the radial direction, and the appearance attractiveness is improved.

In an embodiment, the interval between two adjacent fire hole outlets is larger than the width of the fire hole, i.e. the width of the convex tooth 12 is larger than the interval between two adjacent grooves 111, so as to avoid the problem of fire bouncing caused by too small interval between the two fire hole outlets. The spacing between the adjacent two fire hole outlets is greater than 2mm, more preferably the spacing between the adjacent two fire hole outlets is greater than 5mm and less than 20mm, i.e. the outer end width of the tooth 12 is greater than 5mm and less than 20mm.

It will be appreciated that since the outer ring fire cover 1a corresponds to the large fire of the gas range and the inner ring fire cover 1b corresponds to the small fire of the burner 100, the interval between the outlets of two adjacent inner fire holes on the inner ring fire cover 1b is greater than the interval between the outlets of two adjacent outer fire holes on the outer ring fire cover 1a, i.e. the outer end of the inner lobe 12b is greater than the outer end width of the outer lobe 12 a.

As shown in fig. 2 and 4, in one embodiment, the fire cover 1 is connected to the mounting portion 21 by using a screw fastener 4 to improve the mounting stability of the fire cover 1 to the mounting portion 21. Specifically, the mounting portion 21 is provided with a fastening through hole therethrough, the fire cover 1 is provided with a fastening screw hole, and the threaded fastener 4 passes through the fastening through hole from bottom to top and is screwed into the fastening screw hole. The fastening screw hole is preferably a blind hole with a lower opening, so that the fastening screw hole is prevented from penetrating through the upper end face of the fire cover 1 upwards to influence the performance of the fire cover 1.

In order to further improve the connection tightness between the mounting portion 21 and the fire cover 1, the lower end surface of the fire cover body 11 is provided with mounting protrusions 15 in a protruding manner, the mounting protrusions 15 are provided in one-to-one correspondence with the fastening screw holes, and the mounting protrusions 15 are provided with the fastening screw holes. By providing the mounting convex portion 15, the fitting length of the fastening screw 4 and the fire cover 1 can be increased while the thickness of the fire cover body 11 is reduced, thereby increasing the fitting stability of the fastening screw 4 and the fire cover 1.

The fastening screw 4 connected between the inner ring fire cover 1b and the inner mounting portion 21b is an internal screw fastening 4b, and the inner mixing chamber and the inner groove 111b are both opened on the inner ring fire cover 1b due to the small size of the inner ring fire cover 1b, so that in one embodiment, the internal screw fastening 4b is screwed at the center of the inner ring fire cover 1b.

The fastening screw 4 connected between the outer ring fire cover 1a and the outer mounting portion 21a is provided as an external screw fastener 4a, and since the outer ring fire cover 1a is large in size, in order to ensure the mounting stability between the outer ring fire cover 1a and the outer mounting portion 21a, a plurality of external screw fasteners 4a are provided along the circumferential direction of the outer ring fire cover 1a at intervals, that is, a plurality of mounting protrusions 15 are provided.

As shown in fig. 4 and 8, in one embodiment, the outer mounting portion 21a is provided with a mounting groove 21a2, and the mounting protrusion 15 of the outer ring fire cover 1b is located in the mounting groove 21a2 and connected to the bottom of the mounting groove 21a2, and the mounting protrusion 15 abuts against the bottom of the mounting groove 21a 2.

For the outer ring fire cover 1b, in order to avoid the arrangement of the installation convex portion 15 from affecting the arrangement of the fire holes, the position where the installation convex portion 15 is arranged is not provided with the fire holes. That is, a group of fire hole groups is formed between two adjacent mounting protrusions 15, each fire hole group comprises a plurality of fire holes arranged at intervals along the circumferential direction of the fire cover 1, in the same fire hole group, the distance between two adjacent fire holes is a first distance, and the first distances are the same, so that the processing of the fire holes is simplified, and the uniformity of flame in the circumferential direction of the fire cover 1 is improved. The interval between two adjacent fire holes in two adjacent fire hole groups is the second interval, and the second interval is greater than first interval to provide the space of dodging for the setting of installation convex part 15. That is, in the same fire hole group, the teeth 12 between two adjacent fire holes have a first width, the teeth 12 between two adjacent fire hole groups have a second width, the first width is smaller than the second width, the first width is preferably smaller than 12mm, and the second width is preferably greater than 10mm and smaller than 25mm.

As shown in fig. 1 and 6, in order to improve the assembly efficiency of the inner ring fire cover 1b and the inner mounting portion 21b, the lower end surface of the fire cover body 11 of the inner ring fire cover 1b extends downward to form a positioning column portion 17, the inner mounting portion 21b is provided with a positioning hole 21b2, and the positioning column portion 17 is inserted into the inner positioning hole 21b2 to realize the mounting and positioning of the inner ring fire cover 1b and the inner mounting portion 21 b. The positioning column portions 17 are preferably spaced at least two in the circumferential direction of the installation fire cover 1, and the positioning holes 21b2 are provided in one-to-one correspondence with the positioning column portions 17.

In order to avoid this problem, as shown in fig. 7 and 9, in an embodiment, the upper end surface of the fire cover body 11 is convexly provided with a protrusion 16, and a plurality of protrusions 16 are arranged at intervals. The arrangement of the protruding portion 16 enables the upper end face of the fire cover 1 to be of a concave-convex structure, water drops are prevented from converging on the upper end face of the fire cover 1, water drops on the upper end face of the fire cover 1 are dispersed, rapid evaporation of water drops dropping on the upper end face of the fire cover 1 is facilitated, and accordingly the influence of water drops accumulated on the upper end face of the fire cover 1 on combustion is avoided.

In one embodiment, the protruding portions 16 are preferably arranged in a plurality of rows side by side along the first direction, each row includes a plurality of protruding portions 16 arranged at intervals along the second direction, and the first direction and the second direction are perpendicular to each other, so that the number of protruding portions 16 on the fire cover 1 can be increased, and the evaporation efficiency of water drops can be further improved.

The projections 16 may be, but are not limited to, diamond, rectangular, square, or other shapes. The upper end surface of the boss 16 is preferably smaller than 40mm, so that the boss 16 is prevented from being too small to affect processing, and the boss 16 is prevented from being too large in end surface area to enable water drops to be converged on the boss 16.

In order to prevent water drops falling on the upper end surface of the fire cover 1 from flowing out of the fire cover 1 inwards or outwards to drop on the flame, the outer periphery of the fire cover body 11 is upwards extended with an outer baffle edge part 13, and the upper end of the outer baffle edge part 13 is higher than the upper end surface of the fire cover body 11 and also higher than the upper end surface of the protruding part 16, so that water drops stopping the upper end surface of the fire cover body 11 outwards flow to the outer fire hole.

As for the outer ring fire cover 1a, since the outer ring fire cover 1a is of a ring-shaped structure, in one embodiment, the inner peripheral edge of the outer ring fire cover 1a extends upward to have an inner blocking edge 14, and the upper end of the inner blocking edge 14 is higher than the upper end face of the boss 16 to stop water drops dropping on the outer ring fire cover 1a from flowing out from the inner side of the outer ring fire cover 1a to the inside of the burner 100.

In an embodiment, the included angle between the inner side surface of the outer flange 13 and the upper end surface of the fire cover body 11 is greater than 90 ° so as to ensure that the water drops dropping on the outer flange 13 can flow onto the fire cover body 11 along the inner side surface of the outer flange 13. Further, the included angle between the outer side surface of the inner flange 14 and the fire cover body 11 is greater than 90 °, so that water drops falling on the inner flange 14 can flow to the fire cover body 11 along the outer side surface of the inner flange 14.

As shown in fig. 5 and 9, in an embodiment, the inner periphery of the outer ring fire cover 1a extends downward to form an inner positioning ring portion 18, the inner positioning ring portion 18 is sleeved inside the outer mounting portion 21a, and the outer side wall of the inner positioning ring portion 18 abuts against the inner side wall of the outer mounting portion 21a, so as to realize the radial mounting and positioning of the outer ring fire cover 1a and the outer mounting portion 21 a.

As shown in fig. 1, 2, 4 and 10, in one embodiment, the outer mounting portion 21a is of an annular structure, the inner mounting portion 21b is of a cylindrical structure with a closed upper end and an open lower end, the inner mounting portion 21b is internally provided with a partition cylinder portion 23, the partition cylinder portion 23 is arranged inside the inner mounting portion 21b and is arranged at a distance from the inner side wall of the inner mounting portion 21b, an outer premix chamber 25 is formed between the outer side wall of the partition cylinder portion 23 and the inner side wall of the inner mounting portion 21b, and the inner side wall of the partition cylinder portion 23 surrounds to form an inner premix chamber 24. An inner vent hole 21b1 communicating with the inner premix chamber 24 is provided at the top end of the inner mounting portion 21b, and the inner vent hole 21b1 communicates with the inner mixing chamber. The air distributing seat 2 is also provided with an outer vent hole 221 which is communicated with the outer premixing cavity 25 and the outer mixing cavity.

The gas distributing seat 2 includes a connection bridge 22 connected between the outer wall of the inner mounting portion 21b and the outer mounting portion 21a, the connection bridge 22 is provided with a plurality of connection bridges 22 along the circumferential direction of the inner mounting portion 21b at intervals, and the connection bridge 22 is provided with an outer vent 221. The outer end of the outer vent hole 221 is preferably arranged opposite to the mounting groove 21a2, so that the problem of uneven air outlet caused by large air outlet density of the outer fire hole due to the fact that the outer vent hole 221 is opposite to the inner end of the outer fire hole is avoided, and the effect of uniform air outlet is better achieved.

Two outer vent holes 221 are preferably arranged in each connecting bridge portion 22 side by side, so that a communication path between the outer premixing cavity 25 and the outer mixing cavity is increased, uniformity of airflow flowing from the outer premixing cavity 25 to the outer mixing cavity is improved, and aperture requirements of the single outer vent holes 221 are reduced. The outer vent hole 221 is preferably provided obliquely upward from inside to outside to improve the convenience of opening the outer vent hole 221.

The burner 100 further comprises a burner 3, the gas distribution seat 2 is arranged on the burner 3, the burner 3 is provided with an injection channel 34, the injection channel 34 comprises an inner ring injection channel 34b and an outer ring injection channel 34a, the outer ring injection channel 34a and the inner ring air inlet end are used for entering fuel gas and air, the mixed gas of the fuel gas and the air is premixed after entering the injection channel 34, the air outlet of the outer ring injection channel 34a is communicated with the outer premixing cavity 25, and the air outlet of the inner ring injection channel 34b is communicated with the inner premixing cavity 24. Namely, the outer annular injection passage 34a is used to provide the combustible mixture to the outer premix chamber 25 and the inner annular injection passage 34b is used to provide the combustible mixture to the inner premix chamber 24.

The upper end of the burner 3 has a mounting plate portion 31, an inner ring portion 32 vertically protruding from the mounting plate portion 31, and an outer ring portion 33, and the outer ring portion 33 is coaxially provided outside the inner ring portion 32. The lower end of the separation cylinder part 23 is sleeved outside the inner ring part 32, and the upper end of the inner ring injection channel 34b is communicated with the inner cavity of the inner ring part 32; the lower end of the mounting part 21 is sleeved outside the outer ring part 33, and the air outlet end of the outer ring injection channel 34a is communicated with the inner ring part 32 and the cavity between the inner ring parts 32. Namely, the inner ring part 32 and the outer ring part 33 can provide positioning for the installation of the gas distributing seat 2 on the burner 3, and the communication between the injection channel 34 and the premixing cavity is better realized.

In one embodiment, the mounting flange portion 26 extends outward from the lower end of the mounting portion 21, the mounting flange portion 26 is fitted to the mounting plate portion 31, and the mounting flange portion 26 and the mounting plate portion 31 are connected by the screw 5. The screw 5 is preferably provided in plural at intervals along the circumferential direction of the mounting portion 21 to improve the mounting stability and reliability of the gas distribution base 2 on the burner 3.

Example two

As shown in fig. 11 to 13, the present embodiment provides a gas range including a range panel 200, a pot holder assembly 4, a water pan 300, and the burner 100 of the first embodiment. The kitchen panel 200 is provided with a mounting opening, and the water pan 300 is arranged on the kitchen panel 200 and covers the mounting opening; the pan frame assembly 4 is located above the kitchen panel 200, and the pan frame assembly 4 comprises an energy collecting tray 301 and supporting legs 302 connected to the energy collecting tray 301, wherein the supporting legs 302 are arranged at intervals along the circumferential direction of the energy collecting tray 301, and the lower ends of the supporting legs 302 are supported on the water receiving tray 300 to support the energy collecting tray 301. The burner 100 is positioned on the inner side of the energy collecting tray 301, the fire cover 1 is positioned above the kitchen range panel 200, the gas distributing seat 2 extends downwards below the kitchen range panel 200, and the burner 3 is arranged below the kitchen range panel 200.

According to the gas stove provided by the embodiment, by adopting the burner 100, the flame burning speed can be better controlled, the flame burning temperature is restrained, the content of nitrogen oxides generated by burning is reduced, the use safety and reliability of the gas stove are improved, the use energy consumption of the gas stove is reduced, and the energy conservation and emission reduction of the gas stove are better realized.

In one embodiment, the outer mounting portion 21a is spaced from the energy concentrating disc 301, and a secondary air passage 500 is formed between the outer mounting portion 21a and the energy concentrating disc 301 for providing secondary air supply for flame combustion at the outer flame holes.

Assuming that the radius corresponding to the outer side wall of the outer mounting portion 21a is R1, the radius of the inner side wall of the energy collecting disc 301 is R2, the cross-sectional area of the secondary air supply passage is S,

the area of the outlet of each outer fire hole is S1, the number of the outer fire holes is N, and in one embodiment, S is equal to or greater than 2N S1, so that the sufficiency of secondary air supply of the outer fire holes can be ensured, the gas is ensured to be fully combusted, and the emission of nitrogen oxides is reduced.

In one embodiment, the distance between the outer side surface of the outer convex tooth 12a of the outer ring fire cover 1a and the inner side surface of the energy collecting disc 301 is L, and L is smaller than 15mm, more preferably smaller than 10mm, so that the distance between the flame and the inner side surface of the energy collecting disc 301 can be better controlled, the flame temperature can be better controlled, and the heat dissipation effect of the convex tooth 12 can be improved.

Other structures of the gas stove can refer to the prior art, and the focus of the application is not repeated herein.

In the specific content of the above embodiment, any combination of the technical features may be performed without contradiction, and for brevity of description, all possible combinations of the technical features are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing detailed description of the embodiments presents only a few embodiments of the present application, which are described in some detail and are not intended to limit the scope of the present application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. The burner is characterized by comprising a gas distribution seat (2) and a fire cover (1), wherein a plurality of grooves (111) are formed in one of the fire cover (1) and the gas distribution seat (2), the fire cover (1) is buckled on the gas distribution seat (2) and is surrounded by a mixed gas cavity, the grooves (111) are matched with the wall surface of the other one of the fire cover (1) and the gas distribution seat (2) to form fire holes, and a plurality of fire holes are arranged at intervals along the circumferential direction of the fire cover (1) and extend along the radial direction of the fire cover (1) and are communicated with the mixed gas cavity;

the fire cover is characterized in that the lower end face of the fire cover (1) is provided with convex teeth (12) which are downwards convex, the convex teeth (12) are arranged between every two adjacent fire holes, and the lower ends of the convex teeth (12) are lower than the adjacent fire holes.

2. Burner according to claim 1, characterized in that the recess (111) is provided on the fire cover (1).

3. Burner according to claim 2, characterized in that the outer end of the recess (111) is of flared configuration which flares outwards;

and/or the width of the outer end of the groove (111) is more than 2mm and less than 10mm;

and/or the groove depth of the groove (111) is less than or equal to 1mm.

4. Burner according to claim 1, characterized in that the distance of the lower end face of the tooth (12) from the fire hole is greater than or equal to 1mm;

and/or the width of the convex teeth (12) along the circumferential direction of the fire cover (1) is larger than the width of the fire hole;

and/or the width of the convex teeth (12) along the circumferential direction of the fire cover (1) is equal to the interval between two adjacent fire holes.

5. Burner according to any one of claims 1-4, wherein the upper surface of the fire cover (1) is convexly provided with a plurality of protruding parts (16), and wherein a plurality of protruding parts (16) are arranged at intervals.

6. Burner according to any one of claims 1-4, wherein the fire cover (1) comprises an outer ring fire cover (1 a), the fire hole comprises an outer fire hole, the gas distributing seat (2) is provided with an annular outer mounting part (21 a), the outer ring fire cover (1 a) is buckled at the upper end of the outer mounting part (21 a) and surrounds the outer mounting part (21 a) to form the gas mixing cavity, one of the outer ring fire cover (1 a) and the outer mounting part (21 a) is provided with a plurality of grooves (111), the other one is matched with the grooves (111) to form the outer fire hole, the outer ring fire cover (1 a) is provided with the convex teeth (12), and the lower ends of the convex teeth (12) on the outer ring fire cover (1 a) are lower than the outer fire hole;

and/or, fire lid (1) includes inner ring fire lid (1 b), the fire hole includes interior fire hole, divide gas seat (2) have with the coaxial interior installation department (21 b) that set up of inner ring fire lid (1 b), inner ring fire lid (1 b) detain establish the up end of interior installation department (21 b) and with the up end of interior installation department (21 b) is encircled and is formed with the gas mixing chamber, one of inner ring fire lid (1 b) and interior installation department (21 b) is provided with a plurality of recess (111), another with recess (111) cooperation is formed with interior fire hole, be provided with on inner ring fire lid (1 b) protruding tooth (12), the lower extreme of protruding tooth (12) on inner ring fire lid (1 b) is less than interior fire hole.

7. Burner according to claim 6, characterized in that the inner periphery of the outer ring fire cover (1 a) is upwardly bulged with an inner rim portion (14), the outer periphery of the outer ring fire cover (1 a) is upwardly bulged with an outer rim portion (13);

an outer blocking edge part (13) protrudes upwards from the outer periphery of the inner ring fire cover (1 b).

8. Gas stove comprising a focusing disc (301) and a foot (302) supporting said focusing disc (301), characterized in that it comprises a burner according to any one of claims 1-7, said burner being arranged inside said focusing disc (301) and spaced apart from said focusing disc (301).

9. The gas stove according to claim 8, characterized in that the fire cover (1) comprises an outer ring fire cover (1 a), the outer ring fire cover (1 a) is provided with the convex teeth (12), and the distance between the convex teeth (12) on the outer ring fire cover (1 a) and the inner side surface of the energy collecting disc (301) is smaller than 15mm.

10. The gas cooker according to claim 8, wherein the fire cover (1) comprises an outer ring fire cover (1 a), and a secondary air channel is formed between an outer side wall of the gas distribution base (2) and an inner side wall of the energy collecting disc (301);

the outer diameter of the outer side wall of the gas distribution seat (2) is R ₁ The radius of the inner side wall of the energy collecting disc (301) is R ₂ The secondary air passage has a passage area S,

the outlet area of a single fire hole on the outer ring fire cover (1 a) is S1, the number of the fire holes on the outer ring fire cover (1 a) is N, and S is more than or equal to 2N S1.