CN214468614U

CN214468614U - Economical and stable thick and thin combustion fire grate, combustor and water heater

Info

Publication number: CN214468614U
Application number: CN202120124032.8U
Authority: CN
Inventors: 吴德忠
Original assignee: Jiangsu Yemao Kitchen & Bath Technology Co ltd
Current assignee: Jiangsu Yemao Kitchen & Bath Technology Co ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2021-10-22
Anticipated expiration: 2031-01-15

Abstract

The utility model relates to an economical and stable thick and thin burning fire grate, a burner and a water heater, wherein the fire grate comprises a core shell and a shell, the core shell comprises two side plates and a burning top surface, the two side plates and the burning top surface enclose an inner chamber, the inner chamber comprises an injection channel, a flow equalizing chamber and a flow dividing chamber, the shell comprises two outer side plates, and a gap between the outer side plates and the side wall of the flow dividing chamber is divided into a thick burning air outlet gap and an air inlet gap; the side wall of the shunting chamber is provided with a plurality of concentrated combustion gas outlet structures and a plurality of air inlet structures, the concentrated combustion gas outlet gaps are communicated with the shunting chamber through the concentrated combustion gas outlet structures and used for shunting gas to the concentrated combustion gas outlet gaps, and the tops of the concentrated combustion gas outlet gaps are open and form concentrated fire holes; the air inlet gap is communicated with the shunting chamber through the air inlet structure and is used for supplementing air to the shunting chamber, and a light fire hole is formed in the combustion top surface at the top of the shunting chamber. The application not only realizes the thick and thin combustion but also saves the fire grate manufacturing cost.

Description

Economical and stable thick and thin combustion fire grate, combustor and water heater

Technical Field

The utility model relates to a fire row, combustor that realize dark and light burning, this fire row molding is exquisite, and the subassembly is small in quantity, only needs two parts can realize dark and light gas reposition of redundant personnel, saves the fire and arranges the material quantity, and the equipment is convenient.

Background

The dense-dilute burner is a mixed burner combining dense flame and dilute flame, the air coefficient of the dilute flame is high, the gas is insufficient, and the flame is short; the dense flame has a low air coefficient, insufficient air, and a long flame. The rich-lean combustion mode realized by the rich-lean burner can obviously reduce the emission of nitrogen oxides, and is most widely applied to burning appliances such as gas water heaters.

Publication No. CN205480981A discloses a rich-lean burner, which comprises a fire grate, wherein the fire grate is composed of an inner side plate, an outer side plate and a central plate group, the central plate group further comprises a central side plate and a central inner plate, and the inner side plate and the outer side plate are two pieces. The single fire row disclosed in the patent document has many parts, high material cost and assembly cost, and high manufacturing cost of the whole burner.

Publication No. CN111442272A discloses a dense-dilute flame burner monomer (namely a fire grate), which comprises an air inlet flow dividing part, a dilute flame burning part and two dense flame burning parts, wherein a flow dividing cavity of the air inlet flow dividing part is positioned in the dilute flame burning part, a dense flame gas outlet device is communicated with a connecting hole, and the dilute flame burning part at the top of the flow dividing cavity forms a dilute flame gas cavity; the thick flame combustion part is arranged at two sides of the thin flame combustion part and is attached, the bulges and the semi-bulges are attached to the wall plate of the thin flame combustion part, and the wall plate of the thin flame combustion part and the wall plate of the thick flame combustion part between the bulges and between the bulges form a thick flame combustion hole; a gap is arranged between the wall plate of the thick flame combustion part and the wall plate of the light flame combustion part, the gap at the upper part of the thick flame gas outlet device is a gas and air mixing cavity, and the gap at the lower part is a primary air channel. Due to the adoption of the structure, the lower end of the gap between the thick flame combustion part and the thin flame combustion plate is provided with the primary air channel, so that primary air is provided for thick flame combustion. The fire grate comprises three relatively independent parts, the three parts need independent configuration molds, the raw material cost, the processing cost and the assembly cost are higher, the manufacturing cost of the combustor is high, and although the thick and thin combustion is realized, the manufacturing cost of the product is also obviously improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an economy, steady type dense and light burning fire row, combustor and water heater are provided to above-mentioned prior art, through ingenious unsmooth molding design, simplify the spare part constitution that single fire was arranged, both can realize dense and light gas reposition of redundant personnel, stable combustion, reach again and show the purpose that reduces fire row cost.

The utility model provides a technical scheme that above-mentioned problem adopted does: an economical and stable thick and thin combustion fire grate is characterized in that: the combustion chamber comprises a core shell and a shell, wherein the core shell comprises two side plates and a combustion top surface, the two side plates are oppositely arranged on two sides of the combustion top surface, an inner chamber is defined by the two side plates and the combustion top surface and comprises an injection channel, a flow equalizing chamber and a flow dividing chamber which are communicated from bottom to top, the shell comprises two outer side plates which are respectively arranged on two sides of the flow dividing chamber, a gap between the outer side plates and the side wall of the flow dividing chamber is divided into an upper concentrated combustion air outlet gap and a lower air inlet gap, and the concentrated combustion air outlet gap and the air inlet gap are mutually isolated; the side wall of the flow distribution chamber is provided with a plurality of concentrated combustion gas outlet structures and a plurality of air inlet structures, the concentrated combustion gas outlet gaps are communicated with the flow distribution chamber through the concentrated combustion gas outlet structures and used for distributing premixed gas to the concentrated combustion gas outlet gaps, and the tops of the concentrated combustion gas outlet gaps are open and form concentrated fire holes; the air inlet gap is communicated with the shunting chamber through the air inlet structure and is used for supplementing air to the shunting chamber, and a light fire hole is formed in the combustion top surface at the top of the shunting chamber.

Preferably, the setting height of the rich combustion gas outlet structure on the fire grate is not higher than the setting height of the air inlet structure on the fire grate. Thereby weakening or avoiding the mutual interference of the air inlet flow and the gas outlet flow.

Preferably, an outer convex portion is formed on the side wall of the shunting chamber from inside to outside, an inner convex portion is formed on the outer side plate from outside to inside, the outer convex portion and the inner convex portion are abutted against each other to form a sealing contact, a gap between the outer side plate and the side wall of the shunting chamber is divided into the rich combustion air outlet gap and the air inlet gap which are vertically separated from each other, an inlet of the air inlet gap is downward, and air entering the air inlet gap from bottom to top is guided into the shunting chamber through the air inlet structure.

Preferably, the outer convex part comprises a continuous convex rib which continuously meanders along the transverse direction of the fire row, so that the continuous convex rib is provided with a plurality of high positions and a plurality of low positions, the rich combustion air outlet structure is arranged at the low positions, the opening of the rich combustion air outlet structure is upward, and the air inlet structure is arranged at the high positions, the opening of the rich combustion air outlet structure is downward. Thereby the thick combustion air outlet structure is communicated with the thick combustion air outlet gap, and the air inlet structure is communicated with the air inlet gap.

Preferably, the air inlet structure and the rich combustion outlet structure are arranged in a staggered mode along the fire grate in the transverse direction.

Preferably, a protrusion is further formed on the side wall of the flow dividing chamber, the protrusion is located in the rich combustion gas outlet gap, and the protrusion plays a role in flow equalization of the gas in the rich combustion gas outlet gap. The side wall of the shunting chamber is also formed with an inclined plane as a flow guide surface of the air flow, so that the air and the fuel gas in the shunting chamber can be uniformly mixed.

Preferably, the two outer side plates are connected at the top by a plurality of connecting strips, and the projection of the connecting strips on the combustion top surface is not interfered with the thin fire holes

Preferably, the upper edge of the outer side plate is formed into a rich flame inner bulge from outside to inside, and the top of the rich combustion gas outlet gap is opened and divided into a plurality of rich flame holes which are distributed at intervals, so that a plurality of rich flames are formed at the top of the rich combustion gas outlet gap.

The utility model discloses a still set up the deep bead in a plurality of fire row below, and the deep bead has a plurality of wind holes.

Another object of the present invention is to provide a water heater, which comprises a burner, a water tank and an air outlet unit. The water heater is selected from a household gas quick water heater, a gas heating water heater and a steam heat source machine.

Compared with the prior art, the utility model has the advantages of:

(1) the fire row that this application designed can realize premixing gas reposition of redundant personnel, air supply to thick and thin burning is realized at the top surface to the fire row, thereby nitrogen oxide production volume in helping reducing the combustion products.

(2) The burning top surface that this application designed fire row is used for light burning, and burning top surface both sides are used for realizing thick burning, realize thick and thin flame interval from this and set up, consume the abundant air in the light flame through thick flame to hold light flame, prevent to take off a fire. The integral combustion is more stable, and the flame rigidity is improved.

(3) Air inlet structure and dense burning give vent to anger the structure and set up simultaneously on the flow distribution room lateral wall in this application, in order to reduce as far as possible to mix the gas and give vent to anger the mutual interference of air current and air admission air current, set up dense burning and give vent to anger the structure and must not be higher than air inlet structure, and the two must be arranged in the fire and transversely stagger each other.

(4) This application is through setting up the outer convex part of tortuous on the lateral wall of reposition of redundant personnel room, convex part in setting up on the lateral wall of shell, utilize outer convex part and interior convex part sealed contact each other, thereby give vent to anger clearance and air admission clearance with the dense burning of isolating each other in the clearance between lateral wall of reposition of redundant personnel room and the lateral wall, thereby introduce the reposition of redundant personnel room through the air admission structure with the air in the air admission clearance, dilute the interior gas of premixing of reposition of redundant personnel room, more specifically dilute the interior gas of premixing of reposition of redundant personnel room of dense burning above the structure of giving vent to anger, thereby realize the bigger light burning of air-fuel ratio at the combustion top surface at the reposition of redundant personnel room top.

(5) The utility model provides an outer convex part is arranged along fire and is transversely zigzag extended, has a plurality of high positions and a plurality of low level, gives vent to anger the structure setting through letting thick burning and makes progress at low level and opening, the air inlet structure sets up at high level and opening up to let the air supply to the flow distribution chamber be later than giving vent to anger the gas reposition of redundant personnel to thick burning in advance in the clearance.

(6) The utility model provides a fire grate comprises core shell and shell, and the core shell only includes two curb plates and a burning top surface, and the three can be through the direct compression molding of a slice material, and the shell tightly includes two outer panels and has more connecting strips, and the three can be through the direct mould pressing of a slice material, stamping forming, and core shell and shell equipment are convenient, only need with the shell cover outside the reposition of redundant personnel room of core shell. The application can save material cost and processing cost, reduce the manufacturing cost of products and enable the products to be popularized on the market more easily.

Drawings

FIG. 1 is a front view of a thick and thin burning fire grate in embodiment 1 of the present invention;

fig. 2 is a left side view of a thick and thin burning fire grate in embodiment 1 of the present invention;

FIG. 3 is a cross-sectional view AA in FIG. 1;

FIG. 4 is a cross-sectional view BB of FIG. 1;

fig. 5 is a perspective view of a thick and thin burning fire grate in embodiment 1 of the present invention;

FIG. 6 is a perspective view of a core shell according to embodiment 1 of the present invention;

fig. 7 is a perspective view of a burner according to embodiment 2 of the present invention;

fig. 8 is a front view of a burner according to embodiment 2 of the present invention;

fig. 9 is a plan view of a burner according to embodiment 2 of the present invention;

fig. 10 is a bottom view of a burner according to embodiment 2 of the present invention;

in the figure, a side plate 1, a combustion top surface 2, an injection channel a, a flow equalizing chamber b, a flow dividing chamber c, a rich combustion air outlet gap 3, an air inlet gap 4, a rich combustion air outlet structure 5, an air inlet structure 6, a rich fire hole 7, a lean fire hole 8, an outer convex part 9, a rich flame inner convex part 10, a wind shield 11, a wind hole 1101, a shell 13, a support plate 14, a cooling hole 1401, an outer side plate 15, an inner convex part 1501 and a connecting strip 16.

Detailed Description

The present invention will be described in further detail with reference to the following drawings, which are illustrative and are not to be construed as limiting the present invention. The description of the present embodiment is corresponding to the accompanying drawings, and the description related to the orientation is also based on the description of the accompanying drawings, and should not be construed as limiting the scope of the present invention.

Example 1

The embodiment relates to a thick and thin burning fire grate, including core shell and shell, wherein the core shell includes two curb plates 1 and top combustion surface 2, and two curb plates 1 are located 2 both sides of top combustion surface, and two curb plates 1 and top combustion surface 2 enclose into an inner chamber, include from bottom to top link up draw passageway an, flow equalizing chamber b, flow distribution chamber c, draw gas and air formation premixed gas through drawing passageway a, premixed gas rises through flow equalizing chamber b and gets into flow distribution chamber c. The housing comprises two outer side plates 15 respectively arranged at two sides of the shunting chamber c, and the tops of the two outer side plates 15 are connected through a plurality of connecting strips 16.

An outer convex part 9 is formed on the side wall of the shunting chamber c from inside to outside, an inner convex part 1501 is formed on the outer side plate 15 from outside to inside, the outer convex part 9 and the inner convex part 1501 are butted mutually to form sealing contact, so that a gap between the outer side plate 15 and the side wall of the shunting chamber c is divided into a rich combustion air outlet gap 3 and an air inlet gap 4 which are not communicated with each other, the rich combustion air outlet gap 3 is positioned on the upper part of the outer convex part 9, the top of the rich combustion air outlet gap is open, the air inlet gap 4 is positioned on the lower part of the outer convex part 9, and the top of the rich combustion air outlet gap is open. In molding, the width of the air intake gap 4 may be set larger than the width of the rich burn air outlet gap 3.

And a dense combustion air outlet structure 5 and an air inlet structure 6 are arranged on the side wall of the flow distribution chamber c. The rich combustion air outlet gap 3 is communicated with the shunting chamber c through the rich combustion air outlet structure 5, and a part of premixed gas in the shunting chamber c enters the rich combustion air outlet gap through the rich combustion air outlet structure 5. Further, the rich flame can be formed by forming the rich fire hole 7 at the open position of the top of the rich combustion exhaust gap 3. The air intake gap 4 is communicated with the shunting chamber c through the air intake structure 6, and air in the air intake gap 4 can be guided to the shunting chamber c, so that premixed gas remained in the shunting chamber c is diluted, and diluted premixed gas forms light combustion on the combustion top surface 2.

In order to uniformly burn flame, the light fire holes 8 are arranged on the combustion top surface 2 and are distributed in a row. The upper edge of the outer side wall 15 is provided with a rich flame inner protrusion 10, so that a plurality of rich flame holes 7 are formed at intervals at the top of the rich combustion gas outlet gap 3, and each rich flame hole 7 correspondingly forms a rich combustion flame.

And a bulge is also formed on the side wall of the flow distribution chamber c and positioned in the dense combustion gas outlet gap 3, so that the flow equalization effect of the premixed gas entering the dense combustion gas outlet gap 3 is realized. In addition, the side wall of the shunting chamber c can be also formed with an inclined surface as a flow guide surface in the process of ascending the airflow in the shunting chamber.

The setting of the rich combustion air outlet structure 5 and the air inlet structure 6 in this embodiment is the key of this application, and during the combustion operation, the shunting chamber c needs to simultaneously realize the shunting of the premixed gas and the air supplement, so that the mutual interference of the gas shunting and the air supplement must be reduced. In the embodiment, the setting height of the rich combustion gas outlet structure 5 on the fire row is lower than the setting height of the air inlet structure 6 on the fire row, or at least is kept flat. Outer convex part 9 includes along the horizontal continuous winding's of fire bank continuous protruding muscle, make continuous protruding muscle be formed by connecting a plurality of domes, therefore have a plurality of high positions and a plurality of low level, the high position corresponds domes's top, the low position corresponds the transition valley between the adjacent domes, dense burning is given vent to anger structure 5 and is set up at low position and opening upwards, air inlet structure 6 sets up at high position and opening downwards, therefore, give vent to anger structure 5 with dense burning and has set up the below at air inlet structure 6, and arrange at the fire and transversely let dense burning give vent to anger structure 5 and air inlet structure 6 stagger each other. In this embodiment, the rich combustion air outlet structure 5 and the air inlet structure 6 are hole-shaped structures, and are easy to process.

The thick and thin combustion fire grate with the structure is formed by assembling a core shell and a shell, wherein the core shell comprises a combustion top surface 2 and two side plates 1, and can be integrally pressed and molded by a piece of material; the shell comprises two outer side plates 15 and a plurality of connecting strips 16, and can also be formed by punching and molding a piece of material, thereby being beneficial to saving materials and working procedures and simplifying assembly working procedures.

Example 2

The embodiment relates to a combustor, including a plurality of fire rows, a plurality of fire rows are combined side by side, fixed mounting is in casing 13, casing 13 inner wall sets up backup pad 14, the fire row both sides that set up side by side support on backup pad 14, set up cooling hole 1401 on backup pad 14, cooling hole 1401 evenly arranges on backup pad 14 for the circulation of air around the fire row is up and down, not only can in time cool off backup pad 14, can also evacuate the cyclone vortex of casing 13 edge and corner department.

Wind shields 11 are further arranged below the fire rows, wind holes 1101 are formed in the wind shields 11, and the wind holes 1101 are at least also formed in the edges of the wind shields 11 so as to achieve air distribution and uniform air intake on the whole wind shields 11.

Example 3

The embodiment relates to a water heater, such as a household gas instantaneous water heater, a gas heating water heater and a steam heat source machine, which comprises the burner, the water tank and the air outlet unit in the embodiment 2. The air outlet unit can be an upper air draft fan or a lower air draft fan. The water tank is positioned above the burner.

In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. An economical and stable thick and thin combustion fire grate is characterized in that: the combustion chamber comprises a core shell and a shell, wherein the core shell comprises two side plates (1) and a combustion top surface (2), the two side plates (1) are oppositely arranged on two sides of the combustion top surface (2), an inner chamber is defined by the two side plates (1) and the combustion top surface (2) and comprises an injection channel (a), a flow equalizing chamber (b) and a flow dividing chamber (c) which are communicated from bottom to top, the shell comprises two outer side plates (15) which are respectively arranged on two sides of the flow dividing chamber (c), a gap between the outer side plates (15) and the side wall of the flow dividing chamber (c) is divided into an upper concentrated combustion air outlet gap (3) and a lower air inlet gap (4), and the concentrated combustion air outlet gap (3) and the air inlet gap (4) are mutually isolated;

a plurality of concentrated combustion gas outlet structures (5) and a plurality of air inlet structures (6) are arranged on the side wall of the flow dividing chamber (c), the concentrated combustion gas outlet gap (3) is communicated with the flow dividing chamber (c) through the concentrated combustion gas outlet structures (5) and is used for dividing gas into the concentrated combustion gas outlet gap (3), and the top of the concentrated combustion gas outlet gap (3) is opened and forms a concentrated fire hole (7); the air inlet gap (4) is communicated with the shunting chamber (c) through the air inlet structure (6) and is used for supplementing air to the shunting chamber (c), and a light fire hole (8) is formed in a combustion top surface (2) located at the top of the shunting chamber (c).

2. The economical smooth rich-lean combustion fire grate of claim 1, characterized in that: the setting height of the concentrated combustion air outlet structure (5) on the fire row is not higher than that of the air inlet structure (6) on the fire row.

3. The economical smooth rich-lean combustion fire grate of claim 2, characterized in that: an outer convex part (9) is formed on the side wall of the shunting chamber (c) from inside to outside, an inner convex part (1501) is formed on the outer side plate (15) from outside to inside, the outer convex part (9) and the inner convex part (1501) are abutted against each other to form sealing contact, and a gap between the outer side plate (15) and the side wall of the shunting chamber (c) is divided into the rich combustion air outlet gap (3) and the air inlet gap (4) which are separated from each other from top to bottom.

4. The economical smooth rich-lean combustion fire grate of claim 3, characterized in that: the outer convex part (9) includes along the horizontal continuous winding's of fire bank continuous protruding muscle, makes continuous protruding muscle has a plurality of high positions and a plurality of low level, dense burning is given vent to anger structure (5) and is set up low level and opening are upwards, air inlet structure (6) set up high level and opening are downwards.

5. The economical, smooth type lean-burn fire grate of claim 1 or 4, wherein: the air inlet structure (6) and the concentrated combustion air outlet structure (5) are arranged in a staggered mode along the fire grate in the transverse direction.

6. The economical smooth rich-lean combustion fire grate of claim 1, characterized in that: a bulge is further formed on the side wall of the flow distribution chamber (c), and the bulge is positioned in the rich combustion gas outlet gap (3); or the side wall of the shunting chamber (c) is also formed with an inclined surface as a flow guide surface of the airflow.

7. The economical smooth rich-lean combustion fire grate of claim 1, characterized in that: the two outer side plates (15) are connected at the top by a plurality of connecting strips (16), and the projections of the connecting strips on the combustion top surface (2) are not interfered with the light fire holes (8).

8. The economical smooth rich-lean combustion fire grate of claim 1, characterized in that: the upper edge of the outer side plate (15) is formed into a dense flame inner bulge (10) from outside to inside, and the top opening of the dense combustion air outlet gap (3) is separated into a plurality of dense fire holes (7) which are distributed at intervals.

9. A burner, characterized by: the fire grate comprises a plurality of fire grates which are combined side by side and fixedly arranged in a shell (13), wherein the fire grates are the economical and stable thick and thin combustion fire grates as set forth in any one of claims 1-8; wind shields (11) are further arranged below the fire rows, and the wind shields (11) are provided with a plurality of wind holes (1101).

10. A water heater, characterized in that: comprising the burner, the water tank and the air outlet unit of claim 9.