CN217584425U - Thick and thin combustor and gas equipment - Google Patents

Abstract

The utility model belongs to the technical field of the burning, a dense-dilute combustor and gas equipment are specifically disclosed. The dense-dilute combustor comprises an inner shell and two outer shells, wherein inner edge plate parts are arranged on two opposite sides of the inner shell, outer edge plate parts are arranged on two opposite sides of each outer shell, the outer edge plate parts of the two outer shells are respectively attached to two opposite sides of the inner edge plate part, a first end of an elastic clamping arm is connected to one outer edge plate part, a second end of the elastic clamping arm sequentially penetrates through the inner edge plate part and the other outer edge plate part and abuts against the outer surface of the outer edge plate part, and each inner edge plate part is at least correspondingly provided with the elastic clamping arm; the inner edge plate part is connected with a first end of an elastic clamping arm, a second end of the elastic clamping arm penetrates through the outer edge plate part and abuts against the outer surface of the corresponding outer edge plate part, and each outer edge plate part is at least correspondingly provided with an elastic clamping arm. The gas equipment comprises the thick and thin burner. The utility model discloses a dense-dilute combustor and gas equipment can improve the packaging efficiency of dense-dilute combustor, reduces equipment cost.

Description

Thick and thin combustor and gas equipment

Technical Field

The utility model relates to a burning technical field especially relates to a dense-dilute combustor and gas equipment.

Background

The burner is a key part in gas equipment such as a gas water heater and the like, and the thick and thin burner capable of realizing thick and thin combustion is more and more widely applied to the gas equipment in order to control the emission of harmful gas during gas combustion. The basic principle of the thick and thin combustion is that one part of gas is combusted under the condition of insufficient air, namely the gas is combusted in a thick way, and the other part of gas is combusted under the condition of excessive air, namely the gas is combusted in a thin way.

The dense-thin combustor generally adopts a multilayer cavity structure, and realizes dense-thin flame combined combustion through the gas quantity and the primary air coefficient of adjacent cavities so as to reduce the content of oxynitride in combustion products. The dense-dilute burner provided by the prior art comprises an inner shell and two outer shells which are respectively arranged on the left side and the right side of the inner shell, wherein a first gas channel and a first fire hole are formed in the inner shell, a second gas channel and a second fire hole are formed between the inner shell and the outer shells, one of the first fire hole and the second fire hole is a dilute fire hole, and the other is a dense fire hole.

In the thick and thin combustor in the prior art, an inner shell and an outer shell are respectively formed by stamping a sheet metal part, and when the inner shell and the outer shell are connected, the inner shell and the outer shell are riveted and fastened by arranging flanges at the edges of the inner shell and/or the outer shell. The existing connection mode of the inner shell and the outer shell needs to be matched with special tooling equipment, so that the cost is higher, and the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem one of will provide a dense and thin combustor, it can effectively solve the problem that current dense and thin combustor equipment difficulty and packaging efficiency are low, improves the packaging efficiency of dense and thin combustor, reduces the equipment cost.

The utility model discloses another of the technical problem who solves will provide a gas equipment, and it can effectively solve the problem that current gas equipment is with high costs and packaging efficiency is low, improves gas equipment's packaging efficiency, reduces the equipment cost.

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

a thick-thin burner comprises an inner shell and two outer shells arranged on two opposite sides of the inner shell respectively, wherein inner edge plate parts are arranged on two opposite sides of the inner shell, outer edge plate parts are arranged on two opposite sides of each outer shell respectively, the outer edge plate parts of the two outer shells are attached to two opposite surfaces of the inner edge plate parts respectively, a first end of an elastic clamping arm is connected onto the outer edge plate part, a second end of the elastic clamping arm penetrates through the inner edge plate part and the other outer edge plate part in sequence and abuts against the outer surface of the outer edge plate part, and each inner edge plate part is at least correspondingly provided with one elastic clamping arm;

or the inner edge plate part is connected with a first end of an elastic clamping arm, a second end of the elastic clamping arm penetrates through the outer edge plate part and abuts against the outer surface of the corresponding outer edge plate part, and each outer edge plate part is at least correspondingly provided with one elastic clamping arm.

Dense-dilute combustor, compare with the background art, the beneficial effect who has does: the utility model provides a dense-dilute burner, through set up the elasticity card arm on the outer board of an outer shell, make the one end of elasticity card arm connect on one of them outer shell, the other end of elasticity card arm passes interior border board portion and outer border board portion in proper order and supports tightly on the surface of another outer shell, thereby can be under the elastic action of elasticity card arm and the elastic card arm to the outer shell support tightly the effect, make the interior border board portion and two outer border board portions that lie in the same side closely press together, guarantee that the outer border board portion of two outer shells can closely laminate with the interior border board portion of inner shell, when improving the convenience of being connected of inner shell and outer shell, guarantee the connection leakproofness between inner shell and outer shell; meanwhile, the second end of the elastic clamping arm sequentially penetrates through the inner shell and the other outer shell, so that the elastic clamping arm can simultaneously realize the connection of the inner shell and the two outer shells, and the connection structure between the inner shell and the outer shells is simplified, thereby effectively simplifying the processing of the inner shell and the outer shells, reducing the processing and assembling cost and improving the assembling efficiency; moreover, the elastic clamping arm and the opening for penetrating through the elastic clamping arm can be processed conventionally, a special processing tool is not needed, and the processing cost is further reduced.

The utility model provides another kind of dense-dilute combustor, because the one end of elasticity card arm is connected with the inner shell, the second end of elasticity card arm supports tightly in the surface of outside board for corresponding outside board closely pastes on the interior board under the elastic action of elasticity card arm, has guaranteed the laminating compactness and the connection leakproofness of interior board and outside board; meanwhile, each outer edge plate part is correspondingly provided with an elastic clamping arm, so that each outer edge plate part can be tightly attached to the inner edge plate part, and the edges of the two outer shells can be effectively and tightly attached to the inner shell; moreover, the elastic clamping arm and the opening for penetrating through the elastic clamping arm can be processed conventionally, a special processing tool is not needed, and the processing cost is further reduced.

In one embodiment, each inner edge plate part is provided with an inner bayonet in a penetrating manner, and each outer edge plate part is provided with an outer bayonet in a penetrating manner;

the first end of the elastic clamping arm is connected to the inner wall of the bayonet of one outer bayonet, and the second end of the elastic clamping arm sequentially penetrates through the inner bayonet and the other outer bayonet and is tightly propped against the outer side plate part; or the first end of the elastic clamping arm is connected to the inner wall of the bayonet of the inner bayonet, and the second end of the elastic clamping arm penetrates through the outer bayonet corresponding to the outer plate part.

In one embodiment, the elastic clamping arm comprises an extending arm part and a clamping part which are connected in an obtuse angle, and one end, far away from the clamping part, of the extending arm part is connected with the inner wall of the bayonet;

when the elastic clamping arm is in a free state, the free end of the clamping and abutting part extends obliquely along the direction departing from the shell to be abutted tightly.

In one embodiment, when the clamping and abutting part abuts against the shell, the clamping and abutting part is in surface contact with the shell;

and/or when the elastic clamping arm is in a free state, the extension arm part is completely positioned in the inner bayonet or the outer bayonet where the extension arm part is positioned, and the free end of the clamping part extends out of the corresponding inner bayonet or the corresponding outer bayonet.

In one embodiment, at least two elastic clamping arms are correspondingly arranged on at least one outer edge plate part of each shell, and the at least two elastic clamping arms corresponding to the same outer edge plate part are arranged at intervals in the height direction of the shell;

and/or the elastic clamping arm extends along the height direction of the shell, and the upper end or the lower end of the elastic clamping arm is connected with the inner wall of the bayonet.

In one embodiment, the second ends of two adjacent elastic clamping arms which abut against the same shell and are located on the same side are arranged in a reverse manner.

In one embodiment, the elastic clamping arm is connected to the inner edge plate part and is formed by punching the inner edge plate part;

or, the elastic clamping arm is connected to the outer edge plate part and is formed by stamping the outer edge plate part.

In one embodiment, the outer bayonet without the elastic clamping arm is provided with a first side edge which is opposite to the second end, and the orthographic projection of the first side edge on the inner edge plate part is positioned in the range of the inner bayonet;

and/or the inner bayonet and the outer bayonet are both rectangular openings, and the first end of the elastic clamping arm is connected with one side edge of the rectangular opening;

and/or when the elastic clamping arm is in a free state, the elastic clamping arm and the rest side walls of the inner bayonet or the outer bayonet where the elastic clamping arm is located are arranged at intervals.

In one embodiment, the inner and outer edge panel portions are also joined by spot welding.

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

a gas appliance comprising a shade burner as described above.

Gas equipment, compare with the background art, the beneficial effect who has is: the utility model provides a gas equipment through adopting foretell shade combustor, can reduce gas equipment's cost, improves gas equipment's packaging efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a rich-lean burner according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at I;

fig. 3 is a schematic view of a split structure of a rich-lean burner provided in an embodiment of the present invention;

fig. 4 is a cross-sectional view of a thick and thin burner according to a first embodiment of the present invention (the solid line is an elastic clip arm in a free state, and the dotted line is an elastic clip arm in a tight state);

fig. 5 is a schematic structural diagram of a housing according to an embodiment of the present invention.

Description of reference numerals:

1. an inner shell; 11. a main body portion; 12. an inner skirt portion; 121. an inner bayonet; 13. a first air inlet; 14. a second air inlet; 15. a first air outlet; 16. a vent hole;

2. a housing; 21. an outer edge plate section; 211. an outer bayonet; 22. an outer convex plate portion; 23. a second air outlet;

3. an elastic clamp arm; 31. an extension arm portion; 32. a clamping and supporting part.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.

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

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example one

The embodiment provides a rich-lean burner which can be applied to gas equipment to realize the combined combustion of rich-lean flames of gas and improve the assembly efficiency of the rich-lean burner and the gas equipment. The gas appliance may be, but is not limited to, a gas water heater, a gas wall-hanging stove, or the like.

As shown in fig. 1 to 3, the rich-lean burner includes an inner casing 1 and two outer casings 2, and the two outer casings 2 are respectively mounted on two opposite outer sides of the inner casing 1. A first injection passage and a first premixing cavity are formed in the inner shell 1, a first air inlet 13 is formed in one side of the inner shell 1 of the first injection passage, and a first air outlet 15 is formed in the top of the inner shell 1 of the first premixing cavity; a second injection channel is formed in the inner shell 1, and a second air inlet 14 is formed in one side of the inner shell 1 of the second injection channel. Every shell 2 all is formed with the second in advance with between the corresponding lateral wall of inner shell 1 and mixes the chamber, and the second mixes the chamber and draws the passageway intercommunication through setting up air vent 16 on inner shell 1 and second, and the second mixes the chamber and is formed with second gas outlet 23 in the top of dense or thin combustor, and first gas outlet 15 presss from both sides and establishes between two second gas outlets 23, and just one in first gas outlet 15 and the second gas outlet 23 is dense burner, and another is thin burner.

It should be noted that, the description herein of "rich burner" refers to a burner that realizes rich flame combustion, and "lean burner" refers to a burner that realizes lean flame combustion, and "lean flame combustion" and "rich flame combustion" are relative, i.e., the fuel-to-air equivalence ratio required for "lean flame combustion" and "rich flame combustion" deviate from the normal equivalence ratio. The air quantity required by the 'light flame combustion' is larger than that required by the 'thick flame combustion', so that the light flame is combusted under the condition of too much air, the flame temperature is reduced by the too much air, the thick flame is incompletely combusted under the anoxic condition, the thick flame temperature is reduced, the flame temperature is reduced by the combustion of the whole body with the specific air-fuel equivalence ratio, the emission of low nitrogen oxides is realized, meanwhile, the fuel incompletely combusted by the thick flame enters a light flame area with the excessive air to form secondary mixed combustion, and finally, the complete and sufficient combustion of the fuel and the air can be realized, and the utilization rate of the fuel gas is improved.

In this embodiment, the first air inlet 13 and the second air inlet 14 are both used for injecting air and fuel gas, and the air-fuel ratio of the air injected by the first air inlet 13 and the air-fuel ratio of the fuel gas injected by the second air inlet 14 are different, and the first premixing cavity and the second premixing cavity are separated to better control the air-fuel ratio of the fuel gas in the first premixing cavity and the second premixing cavity. The air and the fuel gas which are ejected from the first air inlet 13 and have the first air-fuel ratio flow to the first premixing cavity after passing through the first ejection channel, are fully mixed in the first premixing cavity and then flow out from the first air outlet 15 for combustion; the air and the fuel gas with the second air-fuel ratio, which are injected from the second air inlet 14, flow to the second premixing cavity after passing through the second injection passage, and flow out from the second air outlet 23 for combustion after being fully mixed in the second premixing cavity.

In another embodiment, the first air inlet 13 is used for injecting air and fuel gas, two side walls of the inner shell 1 facing the outer shell 2 are respectively provided with a circulation hole, the first premixing cavity is communicated with the second premixing cavity through the circulation hole, and the second air inlet 14 is only used for injecting air or fuel gas. That is, after the mixed gas of the gas and the air with the first air-fuel ratio enters the first premixing cavity through the first injection passage, a part of the mixed gas directly flows out of the first air outlet 15 for combustion, and the other part of the mixed gas flows into the second premixing cavity through the two through holes respectively and is mixed with the air or the gas flowing in from the first injection passage to form the mixed gas with the second air-fuel ratio, and the mixed gas flows out of the second air outlet 23 for combustion.

That is, the utility model discloses in, first premixing chamber and second premixing chamber can be separated, also can communicate, and first gas outlet 15 can be dense burner, also can be for light burner, and the air-fuel ratio of the gas mixture in first premixing chamber and the second mixing chamber can set up according to the demand, the utility model discloses do not do the restriction to this all.

For convenience of subsequent description, the length direction of the rich-lean burner is taken as a first direction, the width direction of the rich-lean burner is taken as a second direction, the height direction of the rich-lean burner is taken as a third direction, and the first direction, the second direction and the third direction are mutually perpendicular.

As shown in fig. 1 and 3, the inner casing 1 has a main body 11, the first injection passage, the first premix chamber, and the second injection passage are formed in the main body 11, inner panel portions 12 are provided on two opposite sides of the main body 11 along the first direction, and the inner panel portions 12 protrude outward from two opposite sides of the main body 11 along the second direction. The specific structure, shape and forming manner of the main body 11 can refer to the prior art, and the present invention is not limited thereto.

The outer shell 2 has an outer convex plate portion 22 protruding outward relative to the inner shell 1 in a direction away from the other outer shell 2, all edges of the outer convex plate portion 22 except the upper end edge are hermetically attached to the outer surface of the inner shell 1, so that the outer convex plate portion 22 and the inner shell 1 surround to form a second premixing cavity with an upper opening, and the second air outlet 23 is formed between the upper end edge of the outer convex plate portion 22 and the upper end edge of the inner shell 1. The specific structure, shape and forming manner of the outer convex plate portion 22 can refer to the prior art, and the present invention is not limited thereto.

Each outer convex plate portion 22 is provided with an outer edge plate portion 21 on both sides in the first direction, the outer edge plate portion 21 is in sealing engagement with the inner edge plate portion 12, and the outer edge plate portions 21 of the two outer shells 2 are respectively in engagement with the opposite two surfaces of the inner edge plate portion 12 on the corresponding side, so that the inner shell 1 is sandwiched between the two outer shells 2. The outer panel portion 21 and the outer convex panel portion 22 are preferably integrally stamped and formed of a sheet metal structure.

As shown in fig. 2 to 5, each inner side plate portion 12 is provided with an inner bayonet 121, each outer side plate portion 21 is provided with an outer bayonet 211, and the outer bayonet 211 and the inner bayonet 121 are opposite to each other in the second direction. An elastic clamping arm 3 is arranged in one outer bayonet 211, the first end of the elastic clamping arm 3 is connected with the inner wall of the bayonet of the outer bayonet 211, and the second end of the elastic clamping arm 3 can penetrate through the inner bayonet 121 and the other outer bayonet 211 and is abutted against the outer surface of the outer side plate part 21 of the other shell 2.

According to the thick-thin burner provided by the embodiment, the elastic clamping arm 3 is arranged on the outer side plate part 21 of the outer shell 2, the inner bayonet 121 is arranged on the inner side plate part 12, and the outer bayonet 211 is arranged on the outer side plate part 21 of the other outer shell 2, so that one end of the elastic clamping arm 3 is connected to one of the outer shells 2, and the other end of the elastic clamping arm 3 sequentially penetrates through the inner bayonet 121 and the outer bayonet 211 to be abutted against the outer surface of the other outer shell 2, so that the inner side plate part 12 and the two outer side plate parts 21 on the same side can be tightly pressed together under the elastic action of the elastic clamping arm 3 and the pressing action of the elastic clamping arm 3 on the outer shell 2, the outer side plate parts 21 of the two outer shells 2 and the inner side plate part 12 of the inner shell 1 can be tightly attached, and the connection sealing performance between the inner shell 1 and the outer shell 2 is ensured while the connection convenience between the inner shell 1 and the outer shell 2 is improved; meanwhile, the second end of the elastic clamping arm 3 sequentially penetrates through the inner shell 1 and the other outer shell 2, so that the elastic clamping arm 3 simultaneously realizes the connection of the inner shell 1 and the two outer shells 2, and the connection structure between the inner shell 1 and the outer shells 2 is simplified, thereby effectively simplifying the processing of the inner shell 1 and the outer shells 2, reducing the processing and assembling cost and improving the assembling efficiency; in addition, the arrangement of the inner bayonet 121, the outer bayonet 211 and the elastic clamping arm 3 can be realized by adopting conventional processing, a special processing tool is not required, and the processing cost is further reduced.

In order to improve the effect of the second end of the elastic clip arm 3 on the housing 2, in an embodiment, the elastic clip arm 3 includes an extending arm portion 31 and a clipping portion 32 connected to each other at an obtuse angle, two ends of the extending arm portion 31 are respectively connected to the clipping portion 32 and the inner wall of the bayonet, and when the elastic clip arm 3 is in a free state, a free end of the clipping portion 32 extends obliquely relative to the extending arm portion 31 in a direction away from the housing 2 to be clipped. This kind of setting, when elasticity card arm 3 passed interior bayonet socket 121 and another outer bayonet socket 211, because extension arm 31 can buckle the slope, and block portion 32 and extension arm 31 are the contained angle setting for block portion 32 is changeed and is supported tightly on the surface of shell 2, thereby increases the reliability of pressing of block portion 32 and shell 2, more is favorable to elasticity restoring force of elasticity card arm 3 to apply to shell 2 department.

Preferably, when the abutting portion 32 abuts against the outer surface of the housing 2, the abutting portion 32 contacts with the outer surface of the outer edge plate portion 21 of the housing 2, so that the contact area between the elastic clamping arm 3 and the housing 2 can be increased, the abutting effect of the abutting portion 32 on the housing 2 is further improved, and the abutting portion 32 is prevented from being separated from the housing 2.

In one embodiment, when the elastic latch arm 3 is in the free state, the extension arm portion 31 is completely located in the outer bayonet 211, and the inner and outer surfaces of the elastic latch arm 3 are flush with the inner and outer surfaces of the outer plate portion 21, respectively. The free end of the engaging portion 32 extends out of the outer bayonet 211 to increase the length of the engaging portion 32, so as to improve the engaging effect between the engaging portion 32 and the housing 2, and further prevent the engaging portion 32 from separating from the engaged housing 2.

The included angle between the abutting portion 32 and the extending arm portion 31 is preferably 140 ° to 170 °, so as to better ensure that the abutting portion 32 can be in surface contact with the outer surface of the housing 2. It will be appreciated that, assuming that the thickness of the inner panel portion 12 is d1, the thickness of the outer panel portion 21 is d2, and the length of the extension arm portion 31 is L, the angle is most preferably set to d1

With such an included angle, after the extension arm 31 obliquely passes through the inner bayonet 121 and the outer bayonet 212, the abutting portion 32 is parallel to the outer edge plate portion 21, that is, the abutting portion 32 can be attached to the outer edge plate portion 21 in parallel, so that the contact area between the abutting portion 32 and the outer edge plate portion 21 is effectively increased.

For the convenience of opening the inner bayonet 121 and the outer bayonet 211, the inner bayonet 121 and the outer bayonet 211 are rectangular holes, and the extending direction of the elastic clamping arm 3 is parallel to one side of the rectangular hole. In other embodiments, the inner bayonet 121 and the outer bayonet 211 can also take other shapes, as long as the elastic clip arm 3 can pass through the inner bayonet 121 and the outer bayonet 211 and be tightly pressed against the housing 2 in the clipping process.

For convenience of description, the outer bayonet 211 provided with the elastic clip arm 3 is referred to as a first outer bayonet, and the outer bayonet 211 opposite to the outer bayonet 211 and located on the other housing 2 is referred to as a second outer bayonet. In an embodiment, the lengths of the inner bayonet 121 and the first outer bayonet in the extending direction of the elastic clip arm 3 are greater than the length of the elastic clip arm 3, so that it can be ensured that the elastic clip arm 3 can pass through the inner bayonet 121 without contacting the side wall of the inner bayonet 121. Preferably, the size of the inner bayonet 121 is the same as that of the first outer bayonet, and each side edge is correspondingly flush, so as to reduce interference and reduce the possibility of scratching the elastic latch arm 3.

The outer bayonet socket of second has and just to the first side that sets up with card support portion 32 (the second end of elasticity card arm 3 promptly), and the projection of first side on interior border board 12 is located the inside projection range of first outer bayonet socket on interior border board 12 (be located the within range of interior bayonet socket 121 promptly) to can be favorable to more guaranteeing that card support portion 32 can block on the outer border board 21 at the outer bayonet socket place of second. Preferably, the remaining sides of the second outer bayonet are flush with the corresponding sides of the inner bayonet 121, respectively, so as to reduce the processing difficulty.

In one embodiment, the width of the outer bayonet 211 and the inner bayonet 121 is larger than the width of the elastic arm 3, so as to prevent the elastic arm 3 from contacting with the sidewall of the outer bayonet 211 and/or the inner bayonet 121 during the clamping process.

Since the height of the inner and outer plate portions 12 and 21 in the height direction is generally greater than the width of the inner and outer plate portions 12 and 21 in the first direction, the elastic clip arm 3 preferably extends in the third direction, the upper end or the lower end of the elastic clip arm 3 is connected to the inner wall of the bayonet, and the length of the inner bayonet 121 and the outer bayonet 211 in the third direction is greater than the width thereof in the first direction. With such an arrangement, while ensuring that the length of the elastic clip arm 3 is sufficient to pass through the inner bayonet 121 and the outer bayonet 211, the influence of the arrangement of the bayonet (the inner bayonet 121 or the outer bayonet 211) on the structural strength of the corresponding inner edge plate portion 12 or the outer edge plate portion 21 can be reduced.

Since the first air inlet 13 and the second air inlet 14 are both provided on one side of the inner case 1 in the first direction, normally, the inner edge plate portion 12 near one side of the first air inlet 13 and the second air inlet 14 is relatively short, and the other inner edge plate portion 12 is relatively long. For convenience of description, the longer inner panel portion 12 is referred to as a first inner panel portion, and the shorter inner panel portion 12 is referred to as a second inner panel portion.

In an embodiment, be provided with on the outside board 21 that corresponds first interior border board at least and be no less than two elasticity card arms 3, and a plurality of elasticity card arm 3 that corresponds with first interior border board sets up at the interval in the third direction, with the laminating compactness of the outside board 21 that strengthens first interior border board and correspond, avoid having the problem in clearance between interior border board 12 and the outside board 21 of the skew elasticity card arm 3 position far away department that leads to because of the tight scope of support of single elasticity card arm 3 is limited, further improve the sealing performance of being connected of inner shell 1 and shell 2.

In one embodiment, all the resilient latch arms 3 corresponding to the same inner panel portion 12 are located on the same housing 2, thereby simplifying the manufacturing process. In another embodiment, the elastic latch arms 3 corresponding to the same inner border plate portion 12 may be respectively located on the two housings 2.

In one embodiment, the second ends of two adjacent elastic clip arms 3 corresponding to the same inner edge plate portion 12 are disposed back to back, so that the action range of a single elastic clip arm 3 can be extended away from the other elastic clip arm 3 as far as possible, thereby increasing the overall action range of the two elastic clip arms 3.

In this embodiment, an outer edge plate portion 21 corresponding to the first inner edge plate portion is provided with a resilient arm 3, and the resilient arm 3 is located approximately in the middle of the outer edge plate portion 21 in the third direction. And two elastic clamping arms 3 are arranged at intervals along the third direction on one outer edge plate part 21 corresponding to the second inner edge plate part. In other embodiments, the number of the elastic latch arms 3 corresponding to each inner edge plate portion 12 may be set according to the length of the corresponding outer edge plate portion 21 and the length of the elastic latch arm 3.

In order to simplify the processing of the elastic clamping arm 3, the elastic clamping arm 3 is formed by stamping the corresponding outer edge plate part 21, so that the elastic clamping arm 3 and the outer edge plate part 21 are of an integrally formed structure, the connection reliability of the elastic clamping arm 3 and the outer edge plate part 21 is effectively ensured, the elastic clamping arm 3 is effectively prevented from being separated, and the local stress intensity is reduced.

It can be understood that the elasticity of the elastic latch arm 3 and the force applied to the housing 2 by the elastic latch arm 3 when the elastic latch arm 3 abuts against the housing 2 can be determined by the material and thickness of the elastic latch arm 3 and the deformation degree of the elastic latch arm 3 during latching.

In one embodiment, in order to further enhance the connection tightness and sealing performance between the inner edge plate portion 12 and the outer edge plate portion 21, the inner edge plate portion 12 and the outer edge plate portion 21 are further connected by spot welding after the elastic clip arm 3 is tightly pressed against the housing 2. With the arrangement, spot welding can be performed under the condition that the inner edge plate part 12 is tightly attached to the outer edge plate part 21, so that the generation of insufficient solder can be effectively avoided, and the welding reliability is improved; meanwhile, the connection between the inner shell 1 and the outer shell 2 is enhanced by adopting a spot welding mode, so that the connection stability, reliability and sealing property of the inner shell 1 and the outer shell 2 can be further enhanced, and the use safety of the thick-thin combustor is improved. Preferably, each of the outer edge plate portions 21 is provided with a plurality of spot welding positions at intervals along the length thereof to enhance the welding effect.

The embodiment also provides a gas device which comprises the thick and thin burner. The gas equipment that this embodiment provided, through adopting foretell shade combustor, can reduce gas equipment's cost, improve gas equipment's packaging efficiency.

Example two

The present embodiment provides a rich-lean burner, and the basic structure of the rich-lean burner provided in the present embodiment is the same as that in the first embodiment, and only a part of the difference exists in the connection structure between the inner casing 1 and the outer casing 2, and the structure that is the same as that in the first embodiment is not repeated in the present embodiment.

In this embodiment, the inner housing 1 is provided with the elastic clip arm 3, that is, the elastic clip arm 3 is provided in the inner bayonet 121 on each side, and the elastic clip arm 3 is provided with at least one corresponding to each outer edge plate portion 21, a first end of each elastic clip arm 3 is connected with the inner wall of the bayonet of the inner bayonet 121, and a second end of each elastic clip arm 3 passes through an outer bayonet 211 and abuts against the outer surface of the corresponding outer edge plate portion 21.

That is, in the thick and thin burner provided in this embodiment, because one end of the elastic clamping arm 3 is connected with the inner shell 1, and the second end of the elastic clamping arm 3 abuts against the outer surface of the outer edge plate portion 21, the corresponding outer edge plate portion 21 abuts against the inner edge plate portion 12 tightly under the elastic action of the elastic clamping arm 3, so that the fitting tightness and the connection tightness between the inner edge plate portion 12 and the outer edge plate portion 21 are ensured; meanwhile, each outer edge plate part 21 is correspondingly provided with an elastic clamping arm 3, so that each outer edge plate part 21 can be tightly attached to the inner edge plate part 12, and the edges of the two outer shells 2 can be effectively and tightly attached to the inner shell 1; moreover, the arrangement of the elastic clamp arm 3 and the arrangement of the inner bayonet 121 and the outer bayonet 211 can be realized by conventional processing, and a special processing tool is not required, so that the processing cost is further reduced.

In this embodiment, two elastic clip arms 3 connected to the same inner edge plate 12 and respectively abutting against the two outer edge plates 21 may be disposed in the same inner bayonet 121, and the two elastic clip arms 3 are disposed in a staggered manner in a direction perpendicular to an extending direction of the elastic clip arms 3, so as to reduce the number of the inner bayonets 121.

Further, elasticity card arm 3 extends along the direction of height of rich and thin combustor, and elasticity card arm 3's upper end or lower extreme and bayonet socket inner wall connection, two elasticity card arms 3 set up along the width direction interval of interior limit board portion 12. In another embodiment, the elastic latch arms 3 may extend along the width direction of the rich/lean burner, and the elastic latch arms 3 located in the same inner bayonet 121 may be spaced apart along the height direction of the rich/lean burner.

In other embodiments, only one elastic clip arm 3 may be disposed in each inner bayonet 121, and the elastic clip arms 3 located on the same inner edge plate portion 12 may be disposed in a staggered manner. In this arrangement, at least one pair of elastic latch arms 3 is preferably provided, and the pair of elastic latch arms 3 includes two elastic latch arms 3 arranged at intervals in the width direction of the inner edge plate portion 12, and the two elastic latch arms 3 are connected to the two outer edge plate portions 21, respectively.

Preferably, for each housing 2, at least two elastic clip arms 3 are correspondingly arranged on the outer edge plate portion 21 far away from the air inlet (the first air inlet 13 and the second air inlet 14), and the elastic clip arms 3 are arranged at intervals in the third direction. Further, the second ends of two adjacent elastic clamping arms 3 abutting against the same outer edge plate portion 21 are arranged back to back.

To improve the convenience of abutting the second end of the resilient latch arm 3 against the outer edge plate portion 21, each outer bayonet 211 has a first side opposite to the second end of the resilient latch arm 3, and the orthographic projection of the first side on the inner edge plate portion 12 is located within the range of the inner bayonet 121.

Other structural arrangements of the elastic clip arm 3, the inner bayonet 121 and the outer bayonet 211 can refer to the first embodiment, and are not described in detail in this embodiment. And in the embodiment, the elastic clamping arm 3 only passes throughThe angle between the outer bayonet 211, the extension arm 31 and the pressing part 32 is preferably set to

In this embodiment, elasticity card arm 3 is by carrying out the punching press formation to interior border plate portion 12, and elasticity card arm 3 and inner shell 1 integrated into one piece guarantee elasticity card arm 3's structural strength promptly, improve elasticity card arm 3's processing convenience.

The embodiment also provides a gas device which comprises the thick and thin burner.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The details of the foregoing embodiments are merely representative of several embodiments of the present invention, which are described in more detail and detail, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a dense-dilute combustor, includes inner shell (1) and set up respectively in two shells (2) of the relative both sides of inner shell (1), the relative both sides of inner shell (1) all are provided with interior border board portion (12), every the relative both sides of shell (2) all are provided with outside board portion (21), two shell (2) outside board portion (21) laminate respectively in the relative both sides of interior border board portion (12), its characterized in that, one be connected with the first end of elasticity card arm (3) on outside board portion (21), the second end of elasticity card arm (3) passes in proper order interior border board portion (12) and another outside board portion (21) and support tightly in the surface of outside board portion (21), every interior border board portion (12) correspond at least and are provided with one elasticity card arm (3);

or, be connected with the first end of elasticity card arm (3) on interior border board portion (12), the second end of elasticity card arm (3) passes one outside board portion (21) and support tightly in corresponding the surface of outside board portion (21), every outside board portion (21) corresponds at least and sets up one elasticity card arm (3).

2. The rich-lean burner of claim 1, wherein each inner edge plate portion (12) is provided with an inner bayonet (121) in a penetrating manner, and each outer edge plate portion (21) is provided with an outer bayonet (211) in a penetrating manner;

the first end of the elastic clamping arm (3) is connected to the inner wall of the bayonet of one outer bayonet (211), and the second end of the elastic clamping arm sequentially penetrates through the inner bayonet (121) and the other outer bayonet (211) and is tightly abutted to the outer edge plate part (21); or the first end of the elastic clamping arm (3) is connected to the inner wall of the inner bayonet (121), and the second end of the elastic clamping arm penetrates through the outer bayonet (211) corresponding to the outer edge plate part (21).

3. A thick and thin burner according to claim 2, characterized in that the elastic latch arm (3) comprises an extension arm part (31) and a latch part (32) which are connected in an obtuse angle, and one end of the extension arm part (31) far away from the latch part (32) is connected with the inner wall of the bayonet;

when the elastic clamping arm (3) is in a free state, the free end of the clamping part (32) extends obliquely along the direction departing from the shell (2) to be tightly clamped.

4. A rich-lean burner according to claim 3, wherein the catching portion (32) is in surface contact with the casing (2) when the catching portion (32) is caught against the casing (2);

and/or when the elastic clamping arm (3) is in a free state, the extension arm part (31) is completely positioned in the inner bayonet (121) or the outer bayonet (211) where the extension arm part is positioned, and the free end of the clamping part (32) extends outwards out of the corresponding inner bayonet (121) or the corresponding outer bayonet (211).

5. A burner according to claim 2, wherein at least two resilient catch arms (3) are provided for at least one of said outer edge plate portions (21) of each of said housings (2), at least two resilient catch arms (3) corresponding to the same outer edge plate portion (21) being spaced apart in the height direction of the burner;

and/or the elastic clamping arm (3) extends along the height direction of the thick and thin burner, and the upper end or the lower end of the elastic clamping arm (3) is connected with the inner wall of the bayonet.

6. A rich-lean burner according to claim 5, characterized in that the second ends of two adjacent elastic snap arms (3) abutting against the same outer edge plate portion (21) are arranged opposite to each other.

7. A grazing burner according to any one of claims 1 to 6, characterized in that said elastic snap arms (3) are connected to said inner panel portion (12), said elastic snap arms (3) being formed by stamping said inner panel portion (12);

or the elastic clamping arm (3) is connected to the outer edge plate part (21), and the elastic clamping arm (3) is formed by stamping the outer edge plate part (21).

8. A thin and light burner according to any of claims 2-6, characterized in that the outer bayonet (211) without the resilient catch arm (3) has a first side located opposite to the second end, the orthographic projection of the first side on the inner edge plate portion (12) being located within the inner bayonet (121);

and/or the inner bayonet (121) and the outer bayonet (211) are both rectangular openings, and the first end of the elastic clamping arm (3) is connected with one side edge of the rectangular opening;

and/or when the elastic clamping arm (3) is in a free state, the elastic clamping arm (3) and the rest side walls of the inner bayonet (121) or the outer bayonet (211) where the elastic clamping arm is located are arranged at intervals.

9. A thin and thick burner according to any one of claims 1 to 6, characterized in that said inner plate portion (12) and said outer plate portion (21) are further joined by spot welding.

10. A gas-fired appliance comprising a thick-thin burner as claimed in any one of claims 1 to 9.

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