CN217816750U

CN217816750U - Outer fire cover for strong-blast gas stove and strong-blast gas stove comprising same

Info

Publication number: CN217816750U
Application number: CN202221033448.XU
Authority: CN
Inventors: 应哲林
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-11-15
Anticipated expiration: 2032-04-29

Abstract

The utility model discloses an outer fire cover for a strong blast gas stove and the strong blast gas stove comprising the same, wherein, the outer fire cover is annular, and a space for arranging an inner fire cover is arranged in a central through hole of the outer fire cover; the outer fire cover is provided with fire holes for combustion, and the fire holes are formed in the inner circumferential surface of the outer fire cover, so that flames between adjacent fire holes are all combusted inwards and are easy to intersect, the fire holes can be ignited mutually, and a lap joint ignition structure is not needed; in a combustion state, adjacent fire outlets can stabilize flame mutually, so that flame separation can be effectively prevented; in addition, outer fire lid can be by the interior fire lid direct ignition after lighting, need not additionally to set up flame transmission hole again, consequently, the utility model discloses an outer fire lid adaptation has the effectual beneficial effect of steady flame effect, flame transmission effect in strong blast gas stove.

Description

Outer fire cover for strong blast gas stove and strong blast gas stove comprising same

Technical Field

The utility model relates to a gas-cooker technical field especially relates to a strong blast air gas-cooker is with outer fire lid and contain its strong blast air gas-cooker.

Background

The household gas stoves on the market are generally atmospheric gas stoves, which are naturally induced, i.e. primary air is formed by naturally sucking peripheral air into gas jet with certain kinetic energy, so that the primary air amount is relatively small, and a large amount of secondary air is supplemented when a fire outlet burns.

The atmosphere burner for the atmosphere gas stove comprises an outer fire cover and an inner fire cover, wherein the outer fire cover is annular, and the inner fire cover is arranged at the center of the outer fire cover. The outer fire cover and the inner fire cover are respectively provided with a fire outlet, and in order to be supplemented by secondary air more easily, the fire outlets are respectively arranged on the outer peripheral surface of the outer fire cover and the outer peripheral surface of the inner fire cover. An ignition needle is arranged between the outer fire cover and the inner fire cover and faces the inner fire cover, and when the ignition is performed, after a fire outlet hole in the inner fire cover is ignited by the ignition needle, flame ignites the outer fire cover through a flame transfer hole in the outer fire cover.

The main reason why the above atmospheric burner cannot be applied to a strong blast gas stove is that the strong blast gas stove adopts a blower to provide primary air, the primary air quantity of which is much larger than that of the atmospheric gas stove, so the air flow speed at the fire hole is naturally much higher, which can cause a serious flame-out problem.

In addition, the ignition of the outer fire cover of the atmospheric burner depends on the flame transmission of the flame transmission holes, and the arrangement of the flame transmission holes increases the processing difficulty of the outer fire cover.

In addition, go out the fire hole and set up on outer fire lid, flame outwards burns, receives flame length, and flame is difficult crossing, and the flame transfer between the fire hole must set up the overlap joint and ignite the structure and form the closed loop, just can realize the flame transfer between the fire hole, but the overlap joint is ignited the setting of structure and has also increased outer fire lid's the processing degree of difficulty.

Therefore, it is desirable to provide an outer fire cover which is simple to process and is adapted to a forced air gas cooker.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application solves the technical problem that an outer fire cover in the prior art cannot be adapted to a strong-blast gas stove by providing the outer fire cover for the strong-blast gas stove and the strong-blast gas stove comprising the same.

In order to solve the technical problems, in a first aspect, the embodiment of the present application provides an outer fire cover for a forced-air gas cooker, wherein the outer fire cover is annular, and a space for arranging an inner fire cover is arranged in a central through hole of the outer fire cover; the outer fire cover is provided with fire holes for combustion, and the fire holes are all arranged on the inner peripheral surface of the outer fire cover.

Furthermore, each fire outlet is a fire rotating port which is rotationally distributed along the same direction.

Further, outer fire lid is including two fire rings that stack up from top to bottom, and the internal diameter of the fire ring of going out of top is greater than the internal diameter of the fire ring of below, is equipped with on the internal perisporium of each fire ring respectively go out the fire hole to form two fire faces of going out that radially expand from inside to outside along outer fire lid.

Further, outer fire lid still including be used for with ejector complex be connected the base, the fire circle of going out of below is fixed on connecting the base through first mounting, and the fire circle of going out of top is fixed on the fire circle of going out of below through the second mounting.

Furthermore, each fire outlet ring at least comprises a fire outlet sheet layer, each fire outlet sheet layer at least comprises a fire outlet sheet, and the inner edges of the fire outlet sheets are recessed outwards at intervals to form a plurality of fire outlet grooves with the groove openings facing the centers of the fire outlet sheets;

the upper surface and the lower surface of each fire sheet layer are respectively provided with a gasket layer, and each gasket layer at least comprises one gasket;

each fire outlet groove in the same fire outlet sheet layer is aligned up and down, and is enclosed to form a layer of fire outlet hole with the upper and lower adjacent gasket layers, the fire outlet holes in the same layer are arranged at intervals along the circumferential direction and are enclosed into a circle, and each fire outlet hole is communicated with an independent air inlet channel.

Furthermore, an air inlet channel of any fire outlet is correspondingly arranged below the fire outlet, the top end of the air inlet channel is communicated with the corresponding fire outlet, and the bottom end of the air inlet channel extends to the connecting base to be communicated with the ejector;

the air inlet channel is formed by vertically communicating a gasket layer, a fire outlet sheet layer and an air inlet through hole and/or a fire outlet groove which are arranged below the fire outlet hole.

Further, the lower fire outlet ring is defined as a small fire outlet ring, and the upper fire outlet ring is defined as a large fire outlet ring;

the large fire outlet ring comprises a first large gasket layer, a first large fire outlet sheet layer, a second large gasket layer, a second large fire outlet sheet layer and a third large gasket layer which are sequentially stacked from top to bottom;

the first large gasket layer comprises a plurality of first large gaskets which are in a circular ring shape;

the first large fire outlet sheet layer comprises a plurality of first large fire outlet sheets which are vertically aligned and stacked, a plurality of first large fire outlet grooves are formed in the inner edge of each first large fire outlet sheet at intervals along the circumferential direction, and the first large fire outlet grooves are distributed in a rotating mode along the counterclockwise direction;

the second large gasket layer comprises a plurality of second large gaskets, and the second large gaskets are provided with first air inlet through holes which are aligned one by one with the inner ends of the first large fire outlet sheets and are communicated;

the second big fire outlet sheet layer comprises a plurality of second big fire outlet sheets, second big fire outlet grooves are respectively arranged on the second big fire outlet sheets corresponding to the first big fire outlet sheets, each second big fire outlet groove is distributed in a rotating way along the anticlockwise direction, and the outer ends of the second big fire outlet grooves are aligned with the first air inlet through holes one by one and are communicated with the first air inlet through holes;

the third large gasket layer comprises a plurality of third large gaskets, and second air inlet through holes which are aligned one by one and are communicated are respectively arranged at the outer ends of the third large gaskets corresponding to the second large fire outlet grooves;

the small fire outlet ring comprises a first small gasket layer, a first small fire outlet sheet layer, a second small gasket layer, a second small fire outlet sheet layer, a third small gasket layer, a third small fire outlet sheet layer and a fourth small gasket layer which are sequentially stacked from top to bottom.

The first small gasket layer comprises a plurality of first small gaskets, the first small gaskets are in a circular ring shape, and third air inlet through holes which are aligned and communicated with each other are respectively arranged on the first small gaskets corresponding to the second air inlet through holes;

the first small fire outlet sheet layer comprises a plurality of first small fire outlet sheets which are stacked up and down, a plurality of first small fire outlet grooves are formed in the first small fire outlet sheets at intervals along the circumferential direction, each first small fire outlet groove is distributed in a rotating mode along the anticlockwise direction, and fourth air inlet through holes are formed in the first small fire outlet sheets corresponding to the third air inlet through holes;

the second small gasket layer comprises a plurality of second small gaskets, and fifth air inlet through holes which are aligned with and communicated with the fourth air inlet through holes and the outer ends of the corresponding first small fire outlet grooves one by one are formed in the second small gaskets;

the second small fire outlet sheet layer comprises a plurality of second small fire outlet sheets, second small fire outlet grooves are respectively arranged on the second small fire outlet sheets corresponding to the first small fire outlet grooves, the second small fire outlet grooves are distributed in a rotating mode along the anticlockwise direction, and sixth air inlet through holes which are aligned with the fifth air inlet through holes one by one and are communicated with the second small fire outlet sheets are further arranged on the second small fire outlet sheets;

the third small gasket layer comprises a plurality of third small gaskets, and seventh air inlet through holes which are aligned with and communicated with the sixth air inlet through holes and the outer ends of the corresponding second small fire outlet grooves one by one are formed in the third small gaskets;

the third small fire outlet sheet layer comprises a plurality of third small fire outlet sheets, third small fire outlet grooves are formed in the third small fire outlet sheets and correspond to the second small fire outlet grooves respectively, the third small fire outlet grooves are distributed in a rotating mode along the anticlockwise direction, and eighth air inlet through holes which are aligned with the seventh air inlet through holes one by one and are communicated with the third small fire outlet sheets are further formed in the third small fire outlet sheets;

the fourth small gasket layer comprises a plurality of fourth small gaskets, and ninth air inlet through holes which are aligned with and communicated with the eighth air inlet through holes and the outer ends of the corresponding third small fire outlet grooves one by one are formed in the fourth small gaskets;

the connecting base is provided with a plurality of ninth air inlet through holes which are aligned one by one and communicated with each other;

a plurality of first large fire outlet grooves which correspond up and down are aligned and communicated, and form a first large fire outlet hole by being surrounded with the first large gasket above and the second large gasket below; a plurality of second big fire outlet grooves which correspond up and down are aligned and communicated, and form a second big fire outlet hole by being surrounded with the second big gasket above and the third big gasket below;

a plurality of vertically corresponding first small fire outlet grooves are aligned and communicated with each other and form first small fire outlet holes by being surrounded with the first small gaskets on the upper part and the second small gaskets on the lower part; a plurality of second small fire outlet grooves which correspond up and down are enclosed with the second small gaskets above and the third small gaskets below to form second small fire outlet holes; a plurality of vertically corresponding third small fire outlet grooves are aligned and communicated, and enclose with the upper third small gasket and the lower fourth small gasket to form a third small fire outlet hole;

the tenth air through hole, the ninth air inlet through hole and the third small fire outlet groove are aligned and communicated one by one to form an air inlet channel of the third small fire outlet hole;

the tenth air through hole, the ninth air inlet through hole, the eighth air inlet through hole, the seventh air inlet through hole and the second small fire outlet grooves are aligned and communicated one by one to form an air inlet channel of the second small fire outlet hole;

the tenth air through hole, the ninth air inlet through hole, the eighth air inlet through hole, the seventh air inlet through hole, the sixth air inlet through hole, the fifth air inlet through hole and the first small fire outlet groove are aligned and communicated one by one, forming an air inlet channel of the first small fire outlet;

the tenth air inlet through hole, the ninth air inlet through hole, the eighth air inlet through hole, the seventh air inlet through hole, the sixth air inlet through hole, the fifth air inlet through hole, the fourth air inlet through hole, the third air inlet through hole, the second air inlet through hole and the second big fire outlet groove are aligned and communicated one by one, an air inlet channel of a second big fire outlet is formed;

the first air inlet through hole, the second air inlet through hole, the third air inlet through hole, the fourth air inlet through hole, the fifth air inlet through hole, the fourth air inlet through hole, the third air inlet through hole, the second air inlet through hole, the outer end of the second big fire outlet groove, the first air inlet through hole and the first big fire outlet sheet are aligned and communicated one by one to form an air inlet channel of the first big fire outlet hole.

Furthermore, an ejector annular cavity formed by enclosing an ejector inner ring and an ejector outer ring which are coaxially arranged is formed in the top surface of the ejector, an inner ejector pipe communicated along the central shaft of the ejector is arranged in the center of the ejector, an outer ejector pipe is arranged on the bottom surface of the ejector and is communicated with the ejector annular cavity;

the connecting base comprises a base outer ring and a base inner ring which are matched with the ejector; the base inner ring is inserted into the ejector inner ring, the outer peripheral surface of the base inner ring is tightly attached to the inner peripheral surface of the ejector inner ring, the bottom end of the base outer ring is arranged on the top surface of the ejector outer ring, so that a mixing cavity for mixing gas and air is formed by enclosing the ejector annular cavity up and down, and the mixing cavity is communicated with the air inlet channels of the fire outlets through the connecting base; the inner ring of the base is vertically communicated with the inner injection pipe for arranging an inner fire cover;

the base outer ring and the base inner ring are connected through a connecting face, the connecting face is fixedly connected with the fire outlet ring at the bottom through the first fixing piece, and the tenth air through hole is formed in the connecting face to be communicated with the mixing cavity and the air inlet channel of each fire outlet hole.

Further, a secondary air inlet passage is formed on the outer fire cover, and the secondary air inlet passage comprises an air box cover covered on the outer fire cover, the air box cover comprises an air box cover top surface fixed on the upper surface of the outer fire cover and an air box cover peripheral wall arranged along the periphery of the air box cover top surface and extending downwards;

the top surface of the wind box cover and the top surface of the outer fire cover are at least clamped with a piece of air outlet sheet, the inner edges of the air outlet sheets are outwards sunken at intervals to form a plurality of air outlet grooves with the groove openings facing to the center of the air outlet sheet, the outer ends of the air outlet grooves are connected with the inner cavity of the wind box cover, the groove openings of the air outlet grooves face to the center of the outer fire cover to be communicated with the central through hole of the outer fire cover, and then the inner cavity of the wind box cover and the air outlet grooves are communicated to form a secondary air inlet channel.

In a second aspect, the present embodiments provide a forced air gas range including the outer fire cover.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

(1) According to the embodiment of the application, the fire holes are arranged on the inner peripheral surface of the outer fire cover, and compared with the situation that the fire holes are arranged on the outer peripheral surface of the outer fire cover, flames between the adjacent fire holes are all combusted inwards and are easy to intersect, so that the adjacent fire holes can be ignited mutually, a lap joint ignition structure is not needed, the structure of the outer fire cover is simplified, the processing difficulty is reduced, and the processing cost is reduced; in addition, in a combustion state, because the flames between the adjacent fire outlets are intersected, the flames between the adjacent fire outlets can be mutually stabilized, so that the flame separation is effectively prevented; in addition, the outer fire cover of the embodiment of the application has the advantages that the fire outlet holes are formed in the inner circumferential surface of the outer fire cover, so that the outer fire cover can be directly ignited by the ignited inner fire cover, and no flame transfer hole is required to be additionally formed; therefore, the embodiment of the application effectively provides an outer fire cover which is simple to process and is adapted to the strong blast gas stove, solves the technical problem that the outer fire cover in the prior art cannot be adapted to the strong blast gas stove, and achieves the beneficial effects of good flame stabilizing effect, good flame transmission effect and simple processing.

(2) Each fire outlet is a fire rotating port which is rotationally distributed along the same direction (clockwise or anticlockwise), so that the flame intersection between the fire outlets is facilitated, and the flame separation prevention effect and the flame transmission effect are further improved.

(3) The outer fire lid of this application embodiment includes two upper and lower range upon range of play fire circles, and the external diameter of two play fire circles equals, and the internal diameter of the play fire circle of top is greater than the internal diameter of the play fire circle of below, so can form along the radial 2 ladder play fire faces that outwards enlarge from inside of outer fire lid, but the effective dispersion firepower prevents that the firepower from concentrating.

(4) The inner diameter of the small fire outlet ring is limited by the ejector, but the inner diameter of the large fire outlet ring can be adjusted according to the requirements of the heat efficiency, the flame uniformity distribution and the aesthetic degree of the cooker, is not limited by the size of the ejector, and has strong adjustability.

(5) The fire holes of the upper fire ring and the lower fire ring are arranged in a stepped manner, and after the small fire rings are ignited, because the flame transmission between the fire holes is rapid, the detonation caused by gas deposition can be avoided.

(6) The utility model provides an outer fire lid of embodiment is the panel beating fire lid that is formed by the play fire piece of a slice and the equipment of gasket, modular production goes out fire piece and gasket, assemble out outer fire lid according to concrete needs again, the number of piles through adjusting out the fire piece layer can change the number of piles in fire hole, the play fire area in fire hole can be adjusted through adjusting out the intraformational piece quantity of fire of piece, interval between two-layer play fire hole about can adjusting through the quantity on adjustment gasket layer, flame dispersion degree can be adjusted through the internal diameter that adjusts big fire circle, can make up out multiple combination, thereby the different heat load (power) of adaptation, it is adjustable to have the structure, multiple heat load of adaptation, the beneficial effect of commonality is strong.

(7) The fire outlet hole of the outer fire cover of the embodiment of the application is a flat shape formed by punching notches according to the thickness of the material of the outer fire cover, has better adaptability, has stronger flame-separation-preventing performance compared with the traditional fire cover, and is very suitable for a blast gas stove.

(8) Every of the application embodiment goes out fire hole and communicates respectively has independent inlet channel, and inlet channel's one end and the fire hole intercommunication that goes out that corresponds, and on the other end extended to connecting the base, whole fire lid constitutes honeycomb, goes out the independent work separately of fire hole, mutual noninterference to make flame stabilization.

(9) Because the outer fire is covered goes out the fire hole inwards, and the outer peripheral face that outer fire was covered is smooth periphery, and the outer fire of this application embodiment is covered and to be set up secondary air inlet channel, and secondary air inlet channel can additionally supply secondary air for the combustor, and then the forced draft gas cooking utensils that use this outer fire to cover can reduce the primary air volume that draws the injection and provide through the ejector, can reduce the air outlet velocity who goes out the fire hole to can effectively prevent from the flame.

Drawings

FIG. 1 is a schematic structural view of an outer fire cover according to an embodiment of the present disclosure;

FIG. 2 is a top view of an outer fire cover provided in accordance with an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a burner with an outer fire cover according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of a fire plate and a gasket in the partial structure of an outer fire cover according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of fire holes in a portion of the structure of an outer fire cover according to one embodiment of the present application;

FIG. 6 is an exploded view of the outer fire cover according to one embodiment of the present application;

FIG. 7 is a schematic view of a first large gasket of the outer fire cover according to one embodiment of the present application;

FIG. 8 is a schematic structural view of a first large fire exiting piece of an outer fire cover according to an embodiment of the present application;

FIG. 9 is a schematic view of a second large gasket of the outer fire cover according to one embodiment of the present application;

FIG. 10 is a schematic structural view of a second large fire plate of the outer fire cover according to one embodiment of the present application;

FIG. 11 is a schematic view of a third large pad of the outer fire cover according to one embodiment of the present application;

FIG. 12 is a schematic view of a first small shim of an outer fire cover according to one embodiment of the present application;

FIG. 13 is a schematic structural view of a first small fire exiting piece of an outer fire cover according to an embodiment of the present application;

FIG. 14 is a schematic view of a second small gasket of the outer fire cover according to an embodiment of the present disclosure;

FIG. 15 is a schematic structural view of a second small fire-emitting patch of the outer fire cover according to an embodiment of the present application;

FIG. 16 is a schematic view of a third small gasket of the outer fire cover according to one embodiment of the present disclosure;

FIG. 17 is a schematic view of a third small fire-emitting patch of the outer fire cover according to one embodiment of the present application;

FIG. 18 is a schematic view of a fourth small gasket of the outer fire cover according to one embodiment of the present disclosure;

FIG. 19 is a schematic view of the connection base of the outer fire cover according to one embodiment of the present application;

FIG. 20 is a schematic structural view of an eductor provided in accordance with an embodiment of the present application;

FIG. 21 is a partial cross-sectional view of a gas burner with an outer fire cover according to an embodiment of the present application;

FIG. 22 is a sectional view taken along line B-B of FIG. 2;

FIG. 23 is a sectional view taken along line H-H in FIG. 2;

fig. 24 is an enlarged view at M in fig. 23, in which arrows indicate the flow direction of the mixed gas of air and gas;

fig. 25 is an enlarged view at N in fig. 23, in which arrows indicate the flow direction of the mixed gas of air and gas;

FIG. 26 is a bottom view of an outer fire cover with secondary air inlet passages provided in accordance with another embodiment of the present application;

FIG. 27 is a sectional view taken along line B-B of FIG. 26;

FIG. 28 is a schematic view of an outer fire cover with a secondary air intake passage according to another embodiment of the present application;

FIG. 29 is an exploded view of an outer fire cover with a secondary air intake passage according to another embodiment of the present application;

FIG. 30 is a partial cross-sectional view of a gas range with an outer fire cover having a secondary air inlet passage according to another embodiment of the present application;

FIG. 31 is a schematic illustration of an eductor with an upper hood according to another embodiment of the present application.

Detailed Description

This application embodiment is through providing outer fire lid and containing its combustor, and the outer fire lid of having solved among the prior art need set up the overlap joint between flame transfer hole and the fire outlet hole and ignite the structure, leads to the technical problem of outer fire lid processing degree of difficulty grow.

The technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.

It should be noted that "outer fire cover" or "inner fire cover" is a general term used in the field of gas cookers, where "outer fire cover" refers to a peripheral fire cover, also called a big fire cover, and "inner fire cover" refers to a central fire cover, also called a small fire cover.

In the present embodiment, the direction of the outer fire cover 100 toward the bottom of the cooker is defined as the up direction, and the direction of the panel 200 is defined as the down direction; and the direction toward the center of the outer cap 100 is an inner direction, and the direction toward the outside of the outer cap 100 is an outer direction, and the circumferential direction means a circumferential direction along the outer cap 100.

In the present embodiment, in order to distinguish the members corresponding to the large burner 122 and the small burner 121, the names are given "large" and "small" as distinguishing marks, and the sizes are not compared.

In addition, the layer in the fire sheet layers refers to a stack formed by stacking the same fire sheets up and down, the fire holes in each stack are one fire hole, and the fire holes in each layer are arranged at intervals and form a circle. All the fire holes on the same fire ring 120 form a fire surface.

Referring to fig. 1 to 2, an outer fire cover 100 for a forced draft gas cooker according to an embodiment of the present invention is ring-shaped, a space for installing an inner fire cover 400 is provided in a central through hole of the outer fire cover 100, and fire holes 110 of the outer fire cover 100 are all opened on an inner circumferential surface.

In particular, the outer fire cover 100 is preferably a circular ring, but may be other shapes suitable for use. Since the outer fire cover 100 according to the embodiment of the present invention is used for a forced-air gas range, it is not necessary to consider an air source other than a blower, and thus the actual use of the outer fire cover 100 is not affected by the arrangement of the fire holes 110 on the inner circumferential surface of the outer fire cover 100.

In conclusion, the embodiment of the application sets up the fire outlet 110 on the inner peripheral surface of outer fire cover 100, compare in with fire outlet 110 and set up on the outer peripheral surface of outer fire cover 100, the flame between the adjacent fire outlet 110 all inwards burns, intersects more easily to make and to ignite each other between the adjacent fire outlet 110, need not to set up the overlap joint structure of igniting again, simplified outer fire cover 100's structure, reduced the processing degree of difficulty, reduced the processing cost.

In addition, in a combustion state, because flames between the adjacent fire outlet holes 110 are intersected, the flames of the adjacent fire outlet holes 110 can be stabilized mutually, and therefore flame separation is effectively prevented.

In addition, the outer fire cover 100 of the embodiment of the present application allows the outer fire cover 100 to be directly ignited by the ignited inner fire cover 400 by disposing the fire outlet holes 110 on the inner circumferential surface of the outer fire cover 100, and there is no need to additionally provide flame transmission holes.

Fig. 3 shows a burner constructed with an outer fire cover 100 for a forced draft gas range according to an embodiment of the present application, which is provided with ignition needles between the outer fire cover 100 and an inner fire cover 400 as shown in fig. 3. When in ignition, after the fire outlet holes 110 on the inner fire cover 400 are ignited by the ignition needles, the fire outlet holes 110 on the outer fire cover 100 are arranged to face the inner fire cover 400, so that the ignition can be directly performed.

Finally, the fire holes 110 on the outer fire cover 100 are all inward burning, which can effectively reduce outward heat dissipation, and the pot support correspondingly developed and recorded in the patent application with the application number of 202210222641.6 (the creation name of the utility model is pot support and gas cooker containing the same) by the applicant is matched for use, so that a closed combustion area is formed, the beneficial effect of high thermal efficiency is achieved, the temperature rise of non-heating areas (such as table top, knob and the inside of the cooker) can be effectively reduced, and the user experience is improved.

In some embodiments of the present application, as shown in fig. 1 and 3, each of the fire holes 110 is a fire-swirling nozzle that is rotationally distributed in the same direction (clockwise or counterclockwise).

Specifically, each of the fire outlets 110 is a fire-swirling port which is rotationally distributed along the same direction (clockwise or counterclockwise), which is more beneficial to the intersection of flames among the fire outlets 110, thereby further improving the flame-out prevention effect and the flame transmission effect. In addition, the rotary fire port generates rotary fire, the rotary fire enables the fuel gas to be uniformly distributed, the outer flame is uniformly distributed at the bottom of the pot, the combustion is more sufficient, and the energy and the gas are saved.

The fire outlet holes 110 of the outer fire cover 100 are opened inwards, flame burns in the outer fire cover 100, the flame is concentrated, most of users of the household cooker are not professional cooks and are difficult to adapt to too concentrated fire, and therefore the uniformity of flame distribution is also considered.

In order to prevent the user from being unable to adapt to the concentration of flames, as shown in fig. 1 to 3, the outer fire cover 100 of the embodiment of the present invention includes two fire rings 120 stacked up and down, the outer diameters of the two fire rings 120 are equal, and the inner diameter of the upper fire ring 120 is greater than the inner diameter of the lower fire ring 120. Thus, 2 stepped fire outlet surfaces gradually enlarged from inside to outside along the radial direction of the outer fire cover 100 can be formed, so that the firepower can be effectively dispersed, and the firepower can be prevented from being concentrated.

The lower fire ring 120 is defined as a small fire ring 121, and the upper fire ring 120 is defined as a large fire ring 122. The inner diameter of the small fire ring 121 is limited by the ejector 600, but the inner diameter of the large fire ring 122 can be adjusted according to the requirements of the heat efficiency, the flame uniformity distribution and the aesthetic degree of the cooker, is not limited by the size of the ejector 600, and is high in adjustability.

In addition, the fire holes 110 of the upper fire ring 120 and the lower fire ring 120 are arranged in a ladder shape, and after the small fire ring 121 is ignited, because the flame is quickly transferred between the fire holes 110, the detonation caused by the deposition of fuel gas can be avoided.

In some embodiments of the present application, as shown in fig. 1, the outer fire lid 100 further includes a connection base 140 for mating with the injector 600 for connection mating with the injector 600. The small fire rings 121 are fixed on the connection base 140 by first rivets 132, and the two fire rings 120 adjacent to each other up and down are fixed by second rivets 131.

In some embodiments of the present application, as shown in fig. 1, 4, and 5, each fire ring 120 at least includes one fire sheet layer 150, each fire sheet layer 150 at least includes one fire sheet, inner edges of the fire sheets are spaced and outwardly recessed to form a plurality of fire grooves with openings facing the center of the fire sheet, upper and lower surfaces of each fire sheet layer 150 are respectively provided with a gasket layer 160, and each gasket layer 160 includes at least one gasket; each fire outlet groove in the same fire outlet sheet layer 150 is aligned up and down and is enclosed with the upper and lower adjacent gasket layers 160 to form a layer of fire outlet holes 110, the fire outlet holes 110 in the same layer are circumferentially arranged at intervals and are enclosed into a circle, each fire outlet hole 110 is communicated with an independent air inlet channel, and the air inlet channels provide mixed gas of gas and air for each fire outlet hole 110, so that the mixed gas is combusted at each fire outlet hole 110.

The air inlet channel of any fire outlet 110 is correspondingly arranged below the fire outlet 110, the top end of the air inlet channel is communicated with the lower bottom surface of the outer end of the corresponding fire outlet 110, and the bottom end of the air inlet channel extends to the connecting base 140 to be communicated with the ejector 600; the air inlet channel is formed by the up-and-down through of a gasket layer and a fire outlet sheet layer which are positioned below the fire outlet hole 110, and an air inlet through hole and/or a fire outlet groove which are arranged on the connecting base 140.

Specifically, one end of the fire outlet groove is closed, the other end of the fire outlet groove is a notch, and the fire outlet groove is communicated up and down. The fire outlet sheets in the same fire outlet sheet layer 150 have the same shape and size, and the fire outlet grooves in the same fire outlet sheet layer 150 are aligned and communicated up and down. The shape of the gasket and the fire outlet sheet in the same fire outlet ring 120 are both annular, and the inner diameter and the outer diameter are equal. The inner diameter of the fire outlet sheet (or gasket) in the large fire outlet ring 122 is larger than that of the fire outlet sheet (or gasket) in the small fire outlet ring 121, and the outer diameter of the fire outlet sheet (or gasket) in the large fire outlet ring 122 is equal to that of the fire outlet sheet (or gasket) in the small fire outlet ring 121, so that the outer peripheral surface of the smooth outer fire cover 100 is formed.

The utility model provides an outer fire lid 100 of embodiment is the panel beating fire lid that is formed by the piece of putting out a fire and the gasket equipment of a slice, modular production goes out fire piece and gasket, assemble out outer fire lid 100 according to concrete needs again, the number of piles through adjusting out fire piece layer 150 can change the number of piles of going out fire hole 110, the area of going out fire hole 110 can be adjusted to the piece quantity of going out fire through adjusting in the fire piece layer 150, interval between two-layer hole 110 of going out fire can be adjusted about through the quantity of adjustment gasket layer 160, flame dispersion degree can be adjusted through the internal diameter that adjusts big fire circle 122, can make up out multiple combination, thereby the different thermal load (power) of adaptation, it is adjustable to have the structure, but the multiple thermal load of adaptation, the beneficial effect of commonality is strong.

In addition, the outer fire cover 100 of the embodiment of the application is manufactured into the fire pieces and the gaskets through modularization in advance, and then the fire pieces and the gaskets are assembled in a concentrated mode according to needs, so that the assembly is flexible, the universality is high, the production mode can meet market demands more flexibly, the product overstock and loss are reduced, repeated die opening is not needed, and the application prospect is wide.

In addition, the outer fire cover 100 of the embodiment of the application is made of stainless steel, and compared with a brass fire cover in the related art, the material cost is reduced (in terms of 400 g/piece of the outer fire cover 100, the fire cover of the embodiment of the application is made of stainless steel, and compared with the brass fire cover, the material cost of more than 20 yuan can be saved); meanwhile, the stainless steel material has longer service life.

The fire ring 120 and the connecting base 140 according to the embodiment of the present invention are manufactured by a cold stamping process, wherein the cold stamping is a press working method in which a stamping die is used to apply pressure to a plate material or a hot material on a press machine at normal temperature to cause the plate material or the hot material to generate plastic deformation or separation, so as to obtain a part with a required shape and size. The basic processes of cold stamping include a separating process and a forming process, wherein the separating process is a process of separating a stamped workpiece and a sheet material from each other along a required contour line, for example: cutting, blanking, trimming, etc.; the forming process is a processing method in which a blank is plastically deformed without being damaged to obtain a desired shape, size, and accuracy, for example: bending, drawing, forming, and the like.

The brass fire cover in the related art is formed by hot stamping, a blank is heated to a certain temperature, then a stamping machine is used for stamping in a corresponding die and carrying out pressure maintaining quenching so as to obtain a required shape and simultaneously realize phase change of a metal material, the energy consumption is large, and large environmental pollution can be caused during production to influence the health of workers.

In addition, the fire outlet holes 110 of the outer fire cover 100 according to the embodiment of the present invention are formed in a flat shape (e.g., rectangular shape) by notching the thickness of the material thereof, and have better adaptability, and have stronger flame-out resistance compared to the conventional fire cover, so that the outer fire cover is very suitable for the blast gas stove.

Each fire outlet 110 is communicated with an independent air inlet channel, one end of each air inlet channel is communicated with the corresponding fire outlet 110, the other end of each air inlet channel extends to the connecting base 140, and the whole fire cover forms a honeycomb structure. Each fire outlet 110 is provided with an air inlet channel independently, so that the fire outlets 110 can work independently without interference, and flame is stable.

In some embodiments of the present application, as shown in fig. 1 to 5, each fire ring 120 includes at least two fire holes 110, that is, each fire ring 120 includes at least two fire hole layers 150, at least one fire hole 112 at the lowest layer in each fire ring 120 forms a flame stabilizing port, the fire hole 111 above the flame stabilizing port is a main fire hole, and the height of the flame stabilizing port is smaller than the height of the main fire hole.

Specifically, the height of the flame stabilizing port is smaller than that of the main fire outlet hole, that is, the number of fire outlet pieces of the fire outlet piece layer 150 constituting the flame stabilizing port is smaller than that of the fire outlet pieces of the fire outlet piece layer 150 constituting the main fire outlet hole. The height of the flame stabilizing port is smaller than that of the main fire outlet hole above the flame stabilizing port, so that the flame stabilizing port has a smaller fire outlet area and can form better mixing with the surrounding air, and the flame stabilizing port can be fully combusted; steady flame mouth is located the below of main fire outlet, has and goes out the burning of fire outlet root portion below at main, heats main fire outlet root portion to improve the effect of the 110 root temperature in fire outlet, thereby effectively avoid leaving the flame, make the burning stable.

Specifically, the fire outlets are distributed in a rotating manner, that is, the groove length direction of the fire outlet groove in each fire outlet plate is intersected with the radial direction of the fire outlet plate, that is, the groove length direction of the fire outlet groove does not pass through the center of the fire outlet plate, and the rotating angle of the fire outlet groove is 5-20 degrees.

In some embodiments of the present application, as shown in fig. 1 to 5, the large fire ring 122 includes a first large gasket layer, a first large fire sheet layer, a second large gasket layer, a second large fire sheet layer, and a third large gasket layer stacked in sequence from top to bottom.

As shown in fig. 4, 6, and 7, the first large pad layer includes a first large pad 161, the first large pad 161 is circular, a plurality of first outer rivet holes 1611 are disposed on the first large pad 161, and the plurality of first outer rivet holes 1611 are circumferentially disposed on the first large pad 161 at intervals and form a circle. The first large gasket 161 is located on the top surface of the large fire ring 122, and has a thickness greater than that of the other gaskets in the large fire ring 122, and forms a cover of the large fire ring 122.

As shown in fig. 4, 6 and 8, the first big fire sheet layer includes four first big fire sheets 151 stacked in an aligned manner from top to bottom, a plurality of first big fire grooves 1511 are circumferentially arranged on the inner edge of the first big fire sheet 151 at intervals, and the first big fire grooves 1511 are rotationally distributed along the counterclockwise direction; the first large fire outlet plate 151 is further provided with second outer rivet holes 1512 corresponding to the first outer rivet holes 1611 one-to-one and penetrating therethrough.

As shown in fig. 4, 6 and 9, the second large pad layer includes a second large pad 162, and the second large pad 162 is provided with first air inlet through holes 1621 aligned with and penetrating the inner ends of the first large fire outlet grooves 1511 one by one, and third outer rivet holes 1622 corresponding to and penetrating the second outer rivet holes 1512 one by one.

As shown in fig. 4, 6, and 10, the second big fire-discharging sheet layer includes a second big fire-discharging sheet 152, second big fire-discharging grooves 1521 are respectively disposed on the second big fire-discharging sheet 152 corresponding to the first big fire-discharging grooves 1511, each second big fire-discharging groove 1521 is rotationally distributed along the counterclockwise direction, and the outer ends of the second big fire-discharging grooves 1521 are aligned with and pass through the first air inlet through holes 1621 one by one. Fourth outer rivet holes 1522 which are aligned one by one and run through are respectively formed in the second large fire outlet plate 152 corresponding to the third outer rivet holes 1622.

As shown in fig. 4, 6 and 11, the third large gasket layer includes a third large gasket 163, and the third large gasket 163 is provided with second air inlet through holes 1631 and fifth outer rivet holes 1632, which are aligned one by one and penetrate through, respectively, corresponding to the outer ends of the second large fire outlet grooves 1521 and the fourth outer rivet holes 1522.

As shown in fig. 1 and 4, the four first large fire outlet grooves 1511 are aligned vertically and penetrate through, and enclose with the upper first large gasket 161 and the lower second large gasket 162 to form the first large fire outlet hole 111. A second large fire outlet groove 1521, the second large upper gasket 162 and the third large lower gasket 163 surround to form a second large fire outlet 112, the first large fire outlet 111 serves as a main fire outlet, and the second large fire outlet 112 serves as a flame stabilizing port.

As shown in fig. 1 to 5, the small fire ring 121 includes a first small gasket layer, a first small fire sheet layer, a second small gasket layer, a second small fire sheet layer, a third small gasket layer, a third small fire sheet layer, and a fourth small gasket layer stacked in sequence from top to bottom.

As shown in fig. 4, 6 and 12, the first small gasket layer includes a first small gasket 164, the first small gasket 164 is annular, and a third air inlet hole 1641 aligned and penetrating is respectively disposed on the first small gasket 164 corresponding to the second air inlet hole 1631, and a sixth outer rivet hole 1642 aligned and penetrating is respectively disposed on the fifth outer rivet hole 1632. In addition, a plurality of first inner rivet holes 1643 are further formed in the first small pad 164, the plurality of first inner rivet holes 1643 are arranged on the first large pad 161 at intervals and circumferentially surround a circle, and the first inner rivet holes 1643 are located on the inner side of the sixth outer rivet hole 1642. The first small pad 164 is located on the top surface of the small fire ring 121, and has a thickness thicker than other pads in the small fire ring 121, so as to form a cover of the small fire ring 121.

As shown in fig. 4, 6, and 13, the first small fire-discharging sheet layer includes four first small fire-discharging sheets 153 stacked up and down, a plurality of first small fire-discharging grooves 1531 are circumferentially disposed on the first small fire-discharging sheets 153 at intervals, each first small fire-discharging groove 1531 is rotationally distributed along the counterclockwise direction, a fourth air-inlet through hole 1532 is disposed on each first small fire-discharging sheet 153 corresponding to each third air-inlet through hole 1641, seventh outer rivet holes 1533 aligned and penetrating are disposed on each sixth outer rivet hole 1642, and second inner rivet holes 1534 aligned and penetrating are disposed on each first inner rivet hole 1643.

As shown in fig. 4, 6 and 14, the second small gasket layer includes a second small gasket 165, and the second small gasket 165 is provided with eighth outer rivet holes 1652 aligned with and penetrating through the seventh outer rivet holes 1533, third inner rivet holes 1653 aligned with and penetrating through the second inner rivet holes 1534, and fifth inlet through holes 1651 aligned with and penetrating through the fourth inlet through holes 1532 and the outer ends of the corresponding first small fire outlet grooves 1531.

As shown in fig. 4, 6, and 15, the second small fire outlet sheet layer includes two second small fire outlet sheets 154, second small fire outlet grooves 1541 are respectively disposed on the second small fire outlet sheets 154 corresponding to the first small fire outlet grooves 1531, and each of the second small fire outlet grooves 1541 is distributed in a counterclockwise direction in a rotating manner. The second small fire outgoing fin 154 is provided with sixth air intake through holes 1542 which are aligned one by one with the fifth air intake through holes 1651 and penetrate therethrough, fourth inner rivet holes 1544 which are aligned one by one with the third inner rivet holes 1653 and penetrate therethrough, and ninth outer rivet holes 1543 which are aligned one by one with the eighth outer rivet holes 1652 and penetrate therethrough.

As shown in fig. 4, 6 and 16, the third small pad layer includes a third small pad 166, and the third small pad 166 is provided with a tenth outer rivet hole 1662 aligned and penetrated with each ninth outer rivet hole 1543, a fifth inner rivet hole 1663 aligned and penetrated with each fourth inner rivet hole 1544, and a seventh air inlet through hole 1661 aligned and penetrated with each sixth air inlet through hole 1542 and the outer end of the corresponding second small fire outlet groove 1541.

As shown in fig. 4, 6, and 17, the third small fire outlet sheet layer includes a third small fire outlet sheet 155, third small fire outlet grooves 1551 are respectively formed on the third small fire outlet sheet 155 corresponding to the second small fire outlet groove 1541, and the third small fire outlet grooves 1551 are rotationally distributed in the counterclockwise direction. The third small fire plate 155 is provided with eighth air inlet through holes 1552 which are aligned with and penetrate through the seventh air inlet through holes 1661 one by one, sixth inner rivet holes 1554 which are aligned with and penetrate through the fifth inner rivet holes 1663 one by one, and eleventh outer rivet holes 1553 which are aligned with and penetrate through the tenth outer rivet holes 1662 one by one.

As shown in fig. 4, 6 and 18, the fourth small gasket layer includes a fourth small gasket 167, and the fourth small gasket 167 is provided with a twelfth outer rivet hole 1672 aligned with and penetrating through each eleventh outer rivet hole 1553, a seventh inner rivet hole 1673 aligned with and penetrating through each sixth inner rivet hole 1554, and ninth air inlet through holes 1671 aligned with and penetrating through each eighth air inlet through hole 1552 and the outer ends of the corresponding third small fire outlets 1551.

As shown in fig. 1 and 5, the four first small fire outlet grooves 1531 are aligned and communicated up and down, and enclose with the upper first small gasket 164 and the lower second small gasket 165 to form the first small fire outlet holes 113; the two second small fire outlet grooves 1541, the second small upper gasket 165 and the third small lower gasket 166 enclose to form a second small fire outlet hole 114; a third small fire outlet groove 1551, the third small gasket 166 at the upper part and the fourth small gasket 167 at the lower part are encircled to form a third small fire outlet 115; and the first small fire outlet 113 and the second small fire outlet 114 serve as main fire outlets, and the third small fire outlet 115 serves as a flame stabilizing port.

As shown in fig. 20, the top surface of the ejector 600 is provided with an ejector annular cavity defined by an ejector inner ring 640 and an ejector outer ring 630 which are coaxially arranged, an inner ejector pipe 620 which is through along the central axis of the ejector 600 is arranged at the center of the ejector 600, an outer ejector pipe 610 is arranged on the bottom surface of the ejector 600 around the inner ejector pipe 620, the inlet of the outer ejector pipe 610 is exposed, and the outlet of the outer ejector pipe 610 is communicated with the ejector annular cavity.

As shown in fig. 19 and 21, the connection base 140 and the ejector annular cavity are enclosed up and down to form a mixing cavity for mixing the fuel gas and the air. The connection base 140 includes a base outer ring 141, a base inner ring 142 and a connection surface 143 for connecting with the fire ring 120, which are respectively used for matching with the injector 600. The base inner ring 142 is inserted into the ejector inner ring 640, and the bottom end of the base outer ring 141 is arranged on the top surface of the ejector outer ring 630, so that the base 140 and the ejector 600 are in clearance fit, and the base 140 and the ejector annular cavity are connected to form a mixing cavity for mixing gas and air. The outer peripheral surface of the base inner ring 142 is closely attached to the inner peripheral surface of the injector inner ring 640, and the mixing cavity can be sealed. The base inner ring 142 and the inner injection pipe 620 are vertically penetrated to mount the inner fire cover 400.

As shown in fig. 19, the base outer ring 141 is connected to the base inner ring 142 through the connection surface 143, eighth inner rivet holes 145 aligned one by one and penetrating are respectively formed in the connection surface 143 corresponding to the seventh inner rivet holes 1673, and tenth air through holes 144 aligned one by one and penetrating are respectively formed in the connection surface corresponding to the ninth air inlet through holes 1671, and the outer diameter of the connection base 140 is smaller than the outer diameter of the flame projecting ring.

As shown in fig. 21 to 25, the mixing cavity, the tenth air through hole 144, the ninth air inlet through hole 1671, and the third small fire outlet groove 1551 are aligned and communicated one by one to supply air to the third small fire outlet hole 115;

the mixing cavity, the tenth air through hole 144, the ninth air through hole 1671, the eighth air through hole 1552, the seventh air through hole 1661 and the second small fire outlet groove 1541 are aligned and communicated one by one to supply air to the second small fire outlet hole 114;

the mixing cavity, the decimal air inlet through hole 144, the ninth air inlet through hole 1671, the eighth air inlet through hole 1552, the seventh air inlet through hole 1661, the sixth air inlet through hole 1542, the fifth air inlet through hole 1651 and the first small fire outlet groove 1531 are aligned and communicated one by one to supply air to the first small fire outlet hole 113;

the mixing cavity, the decimal air inlet through hole 144, the ninth air inlet through hole 1671, the eighth air inlet through hole 1552, the seventh air inlet through hole 1661, the sixth air inlet through hole 1542, the fifth air inlet through hole 1651, the fourth air inlet through hole 1532, the third air inlet through hole 1641, the second air inlet through hole 1631 and the second big fire outlet groove 1521 are aligned and communicated one by one to supply air to the second big fire outlet hole 112;

the mixing cavity, the decimal air inlet through hole 144, the ninth air inlet through hole 1671, the eighth air inlet through hole 1552, the seventh air inlet through hole 1661, the sixth air inlet through hole 1542, the fifth air inlet through hole 1651, the fourth air inlet through hole 1532, the third air inlet through hole 1641, the second air inlet through hole 1631, the outer end of the second big fire outlet groove 1521, the first air inlet through hole 1621 and the first big fire outlet groove 1511 are aligned and communicated one by one to allow air to enter the first big fire outlet hole 111;

a twelfth outer rivet hole 1672, an eleventh outer rivet hole 1553, a tenth outer rivet hole 1662, a ninth outer rivet hole 1543, an eighth outer rivet hole 1652, a seventh outer rivet hole 1533, a sixth outer rivet hole 1642, a fifth outer rivet hole 1632, a fourth outer rivet hole 1522, a third outer rivet hole 1622, a second outer rivet hole 1512, and a first outer rivet hole 1611 are aligned up and down and fixed by the first rivet 131.

Rivet hole 145 in the eighth, rivet hole 1673 in the seventh, rivet hole 1554 in the sixth, rivet hole 1663 in the fifth, rivet hole 1544 in the fourth, rivet hole 1653 in the third, rivet hole 1534 in the second, rivet hole 1643 in the first align from top to bottom to fix through second rivet 132, thereby realized that big fire circle 122, little fire circle 121 and connection between the base 140 are fixed.

The outer diameter of the connection base 140 is matched with the ejector 600, so that the outer diameter of the connection base 140 is smaller than that of the large fire ring 122, therefore, the air inlet channel on the large fire ring 122 is communicated with the air inlet channel on the small fire ring 121 along the radial direction through the eighth air inlet through hole 1552 of the third small fire piece 155, the eighth air inlet through hole 1552 is longer along the radial direction, and the occupied space is larger, and because the small fire ring 121 and the large fire ring 122 are fixed through the first rivet 132 and the second rivet 131 respectively, enough space can be left on the third small fire piece 155 to arrange the eighth air inlet through hole 1552.

The first large pad 161, the second large pad 162, the third large pad 163, the first small pad 164, the second small pad 165, the third small pad 166, and the fourth small pad 167 all belong to the above-mentioned pads.

The first big fire outlet piece 151, the second big fire outlet piece 152, the first small fire outlet piece 153, the second small fire outlet piece 154 and the third small fire outlet piece 155 all belong to the fire outlet pieces.

The first large fire outlet groove 1511, the second large fire outlet groove 1521, the first small fire outlet groove 1531, the second small fire outlet groove 1541 and the third small fire outlet groove 1551 all belong to the fire outlet grooves.

The first rivet 132 constitutes a first fixing member, and the second rivet 131 constitutes a second fixing member.

As shown in fig. 26 and 27, since the fire outlet holes 110 of the outer fire cover 100 are inward and the outer peripheral surface of the outer fire cover 100 is a flat circumferential surface, in some embodiments of the present application, the outer fire cover 100 is formed with a secondary air inlet channel K, which is as follows:

as shown in fig. 28 and 29, the secondary air intake passage K includes a bellows cover 170 covering the outer fire cover 100. The bellows cover 170 includes a top surface of the bellows cover 170 adapted to the shape and size of the first small spacers 164, and an outer peripheral wall of the bellows cover 170 disposed along an outer periphery of the top surface of the bellows cover 170 and extending downward.

At least one air outlet sheet 180 is clamped between the top surface of the air box cover 170 and the top surface of the outer fire cover 100, the air outlet sheet 180 is matched with the first small gasket 164 in shape and size, twelfth outer rivet holes which are aligned one by one and communicated are respectively arranged on the top surface of the air box cover 170 corresponding to the first outer rivet holes 1611, thirteenth outer rivet holes 182 which are aligned one by one and communicated are respectively arranged on the air outlet sheet 180 corresponding to the first outer rivet holes 1611, and the first rivet 131 penetrates through the twelve outer rivet holes and the thirteenth outer rivet holes 182 and rivets the air box cover 170, the air outlet sheet 180 and the outer fire cover 100 together.

The inner edge of the air outlet sheet 180 is recessed outwards at intervals to form a plurality of air outlet grooves 181 with the mouths facing the center of the air outlet sheet, each air outlet groove 181 is rotationally distributed along the anticlockwise direction (the same as the rotational distribution of the fire outlet grooves), the outer ends of the air outlet grooves 181 are connected with the inner cavity of the ventilation box cover 170, the mouths of the air outlet grooves 181 face the center of the outer fire cover 100 to be communicated with the central through hole of the outer fire cover 100, and then the inner cavity of the air box cover 170 and the air outlet grooves 181 are communicated to form a secondary air inlet channel K.

For example, as shown in fig. 30 and 31, in the strong blowing gas range, an upper wind box cover 810 is hermetically connected to the outer circumferential wall of the injector 600, the upper wind box cover 810 is downwardly covered on the liquid containing tray 500 to enclose an upper wind box for defining primary air, and the air in the upper wind box is supplied by a blower provided in the bottom case 200, and the primary air introduced through the outer injection pipe 610 and the primary air supplied to the inner fire cover 400 are both supplied from the upper wind box.

The bottom end of the outer peripheral wall of the wind box cover 170 is erected on the top surface of the upper wind box cover 810, an annular air inlet cavity surrounding the outer fire cover 100 is enclosed by the inner surface of the wind box cover 170, the outer peripheral surface of the outer fire cover 100 and the top surface of the upper wind box cover 810, a plurality of through holes 811 surrounding the outer fire cover 100 are circumferentially arranged on the top surface of the upper wind box cover 810 at intervals, and the through holes 811 are communicated with the upper wind box and the annular air inlet cavity to supply air to the annular air inlet cavity, so that the combustor obtains air.

The other part of air is injected into the mixing cavity through the injector 600 and is mixed with the fuel gas in the mixing cavity and then is combusted through the fire outlet holes 110 in the outer fire cover 100 and the inner fire cover 400 respectively, and the secondary air inlet channel K provides part of air for the combustor, so that the amount of air injected and provided by the injector 600 can be reduced, the air outlet speed of the fire outlet holes 110 is reduced, and the flame leaving can be effectively prevented.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and, similarly, a second element may be termed a first element, without departing from the scope of example embodiments.

The terms of orientation, outer, intermediate, inner, etc., as referred to or as may be referred to in the specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed according to the position and the use state of the structure. Therefore, these and other directional terms should not be construed as limiting terms.

While the foregoing is directed to the preferred embodiment of the present application, and not to any one of the essential limitations or embodiments thereof, it is noted that various modifications and additions may be made by those skilled in the art without departing from the scope of the present application, which shall be deemed to be within the full scope of the invention. Those skilled in the art can make various changes, modifications and equivalent arrangements to those skilled in the art without departing from the spirit and scope of the present application; meanwhile, any equivalent changes, modifications and evolutions of the above embodiments according to the essential technology of the present application are still within the scope of the technical solution of the present application.

Claims

1. The outer fire cover for the forced-air-blowing gas stove is characterized in that the outer fire cover (100) is annular, and a space for arranging an inner fire cover (400) is formed in a central through hole of the outer fire cover (100); the outer fire cover (100) is provided with fire holes (110) for combustion, and the fire holes (110) are all arranged on the inner circumferential surface of the outer fire cover (100).

2. The outer fire cover for the forced draft gas range as set forth in claim 1, wherein each of said fire holes (110) is a fire rotating port which is rotatably distributed in the same direction.

3. The outer fire cover for a forced draft gas cooker according to claim 1, wherein the outer fire cover (100) includes two fire rings (120) stacked one on another, and an inner diameter of an upper fire ring (120) is larger than an inner diameter of a lower fire ring (120), and the inner peripheral walls of the fire rings (120) are respectively provided with the fire holes (110) to form two fire surfaces expanding from the inside to the outside in a radial direction of the outer fire cover (100).

4. The external fire cover for the forced draft gas cooker according to claim 3, wherein the external fire cover (100) further comprises a connection base (140) for being engaged with the injector (600), the lower fire ring (120) is fixed to the connection base (140) by a first fixing member, and the upper fire ring (120) is fixed to the lower fire ring (120) by a second fixing member.

5. The external fire cover for the forced-air gas cooker according to claim 3, wherein each fire ring (120) comprises at least one fire-discharging sheet layer (150), each fire-discharging sheet layer (150) comprises at least one fire-discharging sheet, and the inner edges of the fire-discharging sheets are recessed outward at intervals to form a plurality of fire-discharging grooves with the groove openings facing the centers of the fire-discharging sheets;

the upper surface and the lower surface of each fire sheet layer (150) are respectively provided with a gasket layer (160), and each gasket layer (160) at least comprises one gasket;

the fire outlets in the same fire outlet sheet layer (150) are aligned up and down and are enclosed with the upper gasket layer (160) and the lower gasket layer (160) to form a fire outlet, the fire outlets in the same layer are circumferentially arranged at intervals and enclosed into a circle, and the fire outlets are communicated with independent air inlet channels.

6. The external fire cover for the forced draft gas cooker according to claim 5, wherein an air inlet passage of any one of the fire outlet holes (110) is correspondingly disposed below the fire outlet hole (110), and the top end of the air inlet passage is communicated with the corresponding fire outlet hole (110), and the bottom end of the air inlet passage extends to the connecting base (140) to be communicated with the injector (600);

the air inlet channel is formed by vertically communicating a gasket layer, a fire outlet sheet layer and an air inlet through hole and/or a fire outlet groove which are arranged below the fire outlet hole (110) and are/is formed on the connecting base (140).

7. The outer fire cover for the forced draft gas cooker according to claim 6, wherein the lower fire ring (120) is defined as a small fire ring (121), and the upper fire ring (120) is defined as a large fire ring (122);

the large fire outlet ring (122) comprises a first large gasket layer, a first large fire outlet sheet (151) layer, a second large gasket layer, a second large fire outlet sheet layer and a third large gasket layer which are sequentially stacked from top to bottom;

the first large gasket layer comprises a plurality of first large gaskets (161), and the first large gaskets (161) are annular;

the first big fire outlet sheet (151) layer comprises a plurality of first big fire outlet sheets (151) which are aligned and stacked up and down, and a plurality of first big fire outlet grooves (1511) are arranged on the inner edge of each first big fire outlet sheet (151) at intervals along the circumferential direction;

the second large gasket layer comprises a plurality of second large gaskets (162), and first air inlet through holes (1621) which are aligned with the inner ends of the first large fire outlet sheets (151) one by one and are communicated are formed in the second large gaskets (162);

the second large fire outlet sheet layer comprises a plurality of second large fire outlet sheets (152), second large fire outlet grooves (1521) are respectively arranged on the second large fire outlet sheets (152) corresponding to the first large fire outlet sheets (151), and the outer ends of the second large fire outlet grooves (1521) are aligned with the first air inlet through holes (1621) one by one and are communicated with the first air inlet through holes;

the third large gasket layer comprises a plurality of third large gaskets (163), and second air inlet through holes (1631) which are aligned one by one and run through are respectively arranged at the outer ends of the third large gaskets (163) corresponding to the second large fire outlet grooves (1521);

the small fire outlet ring (121) comprises a first small gasket layer, a first small fire outlet sheet layer, a second small gasket layer, a second small fire outlet sheet layer, a third small gasket layer, a third small fire outlet sheet layer and a fourth small gasket layer which are sequentially stacked from top to bottom;

the first small gasket layer comprises a plurality of first small gaskets (164), the first small gaskets (164) are annular, and third air inlet through holes (1641) which are aligned and communicated are respectively formed in the first small gaskets (164) corresponding to the second air inlet through holes (1631);

the first small fire outlet sheet layer comprises a plurality of first small fire outlet sheets (153) which are stacked up and down, a plurality of first small fire outlet grooves (1531) are formed in the first small fire outlet sheets (153) at intervals along the circumferential direction, and fourth air inlet through holes (1532) are formed in the first small fire outlet sheets (153) corresponding to the third air inlet through holes (1641);

the second small gasket layer comprises a plurality of second small gaskets (165), and fifth air inlet through holes (1651) which are aligned with and communicated with the fourth air inlet through holes (1532) and the outer ends of the corresponding first small fire outlet grooves (1531) are formed in the second small gaskets (165);

the second small fire outlet sheet layer comprises a plurality of second small fire outlet sheets (154), second small fire outlet grooves (1541) are respectively arranged on the second small fire outlet sheets (154) corresponding to the first small fire outlet grooves (1531), and sixth air inlet through holes (1542) which are aligned with and communicated with the fifth air inlet through holes (1651) one by one are also arranged on the second small fire outlet sheets (154);

the third small gasket layer comprises a plurality of third small gaskets (166), and seventh air inlet through holes (1661) which are aligned with and communicated with the sixth air inlet through holes (1542) and the outer ends of the corresponding second small fire outlet grooves (1541) one by one are formed in the third small gaskets (166);

the third small fire outlet sheet layer comprises a plurality of third small fire outlet sheets (155), third small fire outlet grooves (1551) are respectively arranged on the third small fire outlet sheets (155) corresponding to the second small fire outlet grooves (1541),

eighth air inlet through holes (1552) which are aligned with and communicated with the seventh air inlet through holes (1661) one by one are also formed in the third small fire outlet sheet (155);

the fourth small gasket layer comprises a plurality of fourth small gaskets (167), and the fourth small gaskets (167) are provided with ninth air inlet through holes (1671) which are aligned with and communicated with the eighth air inlet through holes (1552) and the outer ends of the corresponding third small fire outlet grooves (1551) one by one;

the connection base is provided with decimal air through holes (144) which are aligned one by one and are communicated with each ninth air through hole (1671);

a plurality of vertically corresponding first large fire outlet grooves (1511) are aligned and communicated, and enclose with the first large gasket (161) above and the second large gasket (162) below to form a first large fire outlet hole (111); a plurality of second big fire outlet grooves (1521) which correspond up and down are aligned and communicated, and enclose with the second big gasket (162) above and the third big gasket (163) below to form a second big fire outlet hole (112);

a plurality of first small fire outlet grooves (1531) which correspond up and down are aligned and communicated, and form first small fire outlet holes (113) by enclosing with the first small gaskets (164) above and the second small gaskets (165) below; a plurality of second small fire outlet grooves (1541) which correspond up and down, the second small gaskets (165) above and the third small gaskets (166) below enclose to form second small fire outlet holes (114); a plurality of third small fire outlet grooves (1551) which correspond up and down are aligned and communicated, and enclose with the third small gasket (166) above and the fourth small gasket (167) below to form a third small fire outlet hole (115);

the decimal air through hole (144), the ninth air inlet through hole (1671) and the third small fire outlet groove (1551) are aligned and communicated one by one to form an air inlet channel of the third small fire outlet hole (115);

the tenth air through hole (144), the ninth air inlet through hole (1671), the eighth air inlet through hole (1552), the seventh air inlet through hole (1661) and the second small fire outlet groove (1541) are aligned and communicated one by one to form an air inlet channel of the second small fire outlet hole (114);

the tenth air inlet through hole (144), the ninth air inlet through hole (1671), the eighth air inlet through hole (1552), the seventh air inlet through hole (1661), the sixth air inlet through hole (1542), the fifth air inlet through hole (1651) and the first small fire outlet groove (1531) are aligned and communicated one by one to form an air inlet channel of the first small fire outlet hole (113);

the decimal air inlet through hole (144), the ninth air inlet through hole (1671), the eighth air inlet through hole (1552), the seventh air inlet through hole (1661), the sixth air inlet through hole (1542), the fifth air inlet through hole (1651), the fourth air inlet through hole (1532), the third air inlet through hole (1641), the second air inlet through hole (1631) and the second big fire outlet groove (1521) are aligned and communicated one by one to form an air inlet channel of the second big fire outlet hole (112);

the tenth air inlet through hole (144), the ninth air inlet through hole (1671), the eighth air inlet through hole (1552), the seventh air inlet through hole (1661), the sixth air inlet through hole (1542), the fifth air inlet through hole (1651), the fourth air inlet through hole (1532), the third air inlet through hole (1641), the second air inlet through hole (1631), the outer end of the second big fire outlet groove (1521), the first air inlet through hole (1621), the first big fire outlet sheet (151) are aligned one by one and communicated, and an air inlet channel of the first big fire outlet hole (111) is formed.

8. The external fire cover for the strong blast gas stove as claimed in claim 7, wherein the top surface of the ejector (600) is provided with an ejector ring cavity formed by enclosing an ejector inner ring (640) and an ejector outer ring (630) which are coaxially arranged, the center of the ejector (600) is provided with an internal ejector pipe (620) which is through along the central axis of the ejector (600), the bottom surface of the ejector (600) is provided with an external ejector pipe (610), and the external ejector pipe (610) is communicated with the ejector ring cavity;

the connecting base (140) comprises a base outer ring (141) and a base inner ring (142) which are used for being matched with the ejector (600); the base inner ring (142) is inserted into the ejector inner ring (640), the outer peripheral surface of the base inner ring (142) is tightly attached to the inner peripheral surface of the ejector inner ring (640), the bottom end of the base outer ring (141) is arranged on the top surface of the ejector outer ring (630), so that a mixing cavity for mixing gas and air is formed by enclosing the ejector annular cavity up and down, and the mixing cavity is communicated with the air inlet channels of the fire outlets through the connecting base (140); the base inner ring (142) is vertically communicated with the inner injection pipe (620) to be used for arranging the inner fire cover (400);

the base outer ring (141) and the base inner ring (142) are connected through a connecting surface (143), the connecting surface (143) is fixedly connected with the fire outlet ring (120) at the bottom through the first fixing piece, and the decimal air through hole (144) is formed in the connecting surface (143) to communicate the mixing cavity with the air inlet channel of each fire outlet hole.

9. The outer fire cover for a forced draft gas range as set forth in claim 1, wherein the outer fire cover (100) is formed with a secondary air intake passage (K) including a bellows cover (170) covering the outer fire cover (100), the bellows cover (170) including a top surface of the bellows cover (170) fixed to an upper surface of the outer fire cover, and an outer peripheral wall of the bellows cover (170) provided along an outer periphery of the top surface of the bellows cover (170) and extending downward;

a piece of air outlet sheet (180) is at least clamped between the top surface of the air box cover (170) and the top surface of the outer fire cover (100), the inner edge of the air outlet sheet (180) is outwards sunken at intervals to form air outlet grooves (181) with a plurality of notches facing to the centers of the air outlet sheets, the outer ends of the air outlet grooves (181) are connected with the inner cavity of the air box cover (170), the notches of the air outlet grooves (181) face to the centers of the outer fire cover (100) to be communicated with the central through hole of the outer fire cover (100), and then the inner cavity of the air box cover (170) and the air outlet grooves (181) are communicated to form a secondary air inlet channel (K).

10. A strong blast gas burner, characterized in that it comprises an outer fire cover (100) according to any one of claims 1 to 9.