EP4036473A1

EP4036473A1 - Low-nitrogen oxide burner

Info

Publication number: EP4036473A1
Application number: EP22152190.9A
Authority: EP
Inventors: RiMing LIANG; Yufeng Zhang; ChunQi YU; HanWei LIAO; Zhicheng Zhang
Original assignee: Young Gas Appliances Industrial Co Ltd; Ariston Thermo China Co Ltd
Current assignee: Young Gas Appliances Industrial Co Ltd; Ariston Thermo China Co Ltd
Priority date: 2021-01-22
Filing date: 2022-01-19
Publication date: 2022-08-03
Also published as: CN214619543U

Abstract

The present disclosure is related to a low-nitrogen burner, comprising a base shell including a first air inlet, a second air inlet and a vent, wherein a housing is disposed on an upper end of the base shell, an air outlet cavity is arranged between the housing and the base shell, the first air inlet, the vent and the air outlet cavity are communicated, an inner cavity of the base shell is communicated with the second air inlet, the base shell is provided with a combustion part, and wherein a fire bridge is arranged at a top edge of the housing, and the fire bridge extends to an outside of the shell. The beneficial effect of the present disclosure is that: in the present structure, a fire bridge is provided at the top edge of the shell, and the fire bridge extends to the outside of the shell. The fire bridge extends to the adjacent burner and is not affected by the air blown out of the gap, thereby improving the flame transfer stability. In the present structure, the seventh recess and the eighth recess are used to divide the flow, so that the gas flow is more uniform and fully burned.

Description

FIELD OF THE DISCLOSURE

The present disclosure relates to the technical field of gas water heaters, in particular, to a low-nitrogen burner.

BACKGROUND OF THE DISCLOSURE

The public name of the China National Intellectual Property Administration is: a burner, of which the application number is CN201822278315.9 . The structure includes an injection part and a fire-throwing part that are connected to each other. The vents connected by the air ports are provided with multiple fire holes. The vent is equipped with a fluid divider. The fluid divider is composed of multiple diverging fins stacked on top of each other. Each diverging fins is provided with multiple diverging grooves. Two diverging grooves on two adjacent diverging fins are adjacent to form a fire hole. The diverging grooves are formed on the diverging fins, and the diverging grooves are relatively combined to form a fire hole, which is entered by the ejector part. The divided fluid is divided into multiple airflow channels, discharged through the fire hole and ignited by the igniter, to form a mixed airflow without turbulence and turbulence, so that the final combustion is more complete, the mixed airflow is more uniformly directed, the flame burning is more continuous, not easy to backfire, and the flame is smaller, which reduces the emission of nitrogen oxides in the control flue gas, and makes the combustion more complete.
In the process of use, the burner uses an igniter for ignition, and the flame of one burner is transferred to the other burners in turn, so that a row of burners are ignited in turn, but there is a certain gap between the burners, and the gap will blow out air, which affects the stability of flame transmission in a certain procedure.

SUMMARY OF THE DISCLOSURE

The purpose of the present disclosure is to overcome the above-mentioned technical problems and propose a burner which improves the stability of flame transfer and makes the gas flow more uniform.
A low-nitrogen burner is provided, comprising a base shell including a first air inlet, a second air inlet and a vent, wherein a housing is disposed on an upper end of the base shell, an air outlet cavity is arranged between the housing and the base shell, the first air inlet, the vent and the air outlet cavity are communicated, an inner cavity of the base shell is communicated with the second air inlet, and the base shell is provided with a combustion part, and wherein a fire bridge is arranged at a top edge of the housing, and the fire bridge extends to an outside of the shell.
In a preferred embodiment, the top edge of the housing is provided with a fourth recess and the fire bridge is located in the fourth recess.
In a preferred embodiment, the fire bridge is arranged at an inner bottom surface of the fourth recess.
In a preferred embodiment, the fourth recess has a trapezoidal shape.
In a preferred embodiment, an outer surface of the housing is provided with a fifth recess.
In a preferred embodiment, an outer surface of the housing is provided with a seventh recess.
In a preferred embodiment, an outer surface of the base shell is provided with a second convex surface, and the outer surface of the base shell is provided with a third recess.
In a preferred embodiment, an outer surface of the base shell is provided with a first recess, and an outer surface of the housing is provided with a sixth protrusion.
In a preferred embodiment, an outer surface of the housing is provided with an eighth recess and a ninth recess.
In a preferred embodiment, an upper edge of the base shell is provided with at least two air inlet recesses, and one end of the air outlet cavity extends between one of the at least two air inlet recesses and the outer shell.
The beneficial effect of the present disclosure is that: in the present structure, a fire bridge is provided at the top edge of the shell, and the fire bridge extends to the outside of the shell. The fire bridge extends to the adjacent burner and is not affected by the air blown out of the gap, thereby improving the flame transfer stability. In the present structure, the seventh recess and the eighth recess are used to divide the flow, so that the gas flow is more uniform and fully burned.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present disclosure will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings.

FIG. 1 is a schematic diagram of the structure of the present disclosure.
FIG. 2 is a schematic diagram of the structure of FIG. 1 in an exploded state.
FIG. 3 is a schematic diagram of the shell structure.
FIG. 4 is a schematic diagram of the structure of the present disclosure in use.
FIG. 5 is a schematic diagram of a partial enlarged structure at A in FIG. 4.
FIG. 6 is a partial enlarged schematic diagram of the structure of the present disclosure.

Reference numeral: base shell 1, first air inlet 101, second air inlet 102, air vent 103, first recess 104, second convex surface 105, third recess 106, air inlet recess 107, housing 2, air outlet cavity 201, fourth recess 202, fire bridge 203, ninth recess 204, fifth recess 205, sixth protrusion 206, seventh recess 207, eighth recess 208, combustion part 3.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

The embodiments of the present disclosure will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present disclosure, and cannot be understood as a limitation to the present disclosure.
As shown in FIG. 1 to FIG. 6, a low-nitrogen burner is provided, comprising a base shell 1, and the base shell 1 respectively comprising a first air inlet 101, a second air inlet 102 and a vent 103, wherein a housing 2 is installed on the upper end of the base shell 1, an air outlet cavity 201 is arranged between the housing 2 and the base shell 1, the first air inlet 101, the vent 103 and the air outlet cavity 201 are communicated, an inner cavity of the base shell 1 is communicated with the second air inlet 102, the base shell 1 is provided with a combustion part 3, and wherein a fire bridge 203 is arranged at a top edge of the housing 2, and the fire bridge 203 extends to an outside of the housing 2.
In this structure, gas is supplied to the first air inlet 101 and the second air inlet 102 of the base shell 1, one way of gas enters from the first air inlet 101, the gas is discharged from the air vent 103, and the gas is then transported along the gap between the housing 2 and the base shell 1, and is output to the air outlet cavity 201. The other gas enters from the second air inlet 102 and is transported to the combustion part 3 along the cavity in the base shell 1. At this time, the igniter ignites the gas to form a flame. A fire bridge 203 is provided on the top edge of the housing 2, the fire bridge 203 extends to the outside of the housing 2, and the fire bridge 203 extends to the adjacent burner. When the flame of the combustion part 3 is transported from the fire bridge 203 to the adjacent burner to be ignited, a plurality of the burners are ignited in sequence. Other burners adopt this structure, and the fire bridge 203 has the function of blocking the air from the air blown out of the gap, thereby improving the stability of flame transmission.
In the present structure, the top edge of the housing 2 is provided with a fourth recess 202 and the fire bridge 203 is arranged in the fourth recess 202. The top surface of the fire bridge 203 is lower than the top surfaces on both sides of the fourth recess 202, which facilitates the conveyance of flame from the fourth recess 202. The fire bridge 203 and the housing 2 are integrated and the fire bridge 203 is formed by bending a part of the housing 2.
In the present structure, the fire bridge 203 is arranged at the inner bottom surface of the fourth recess 202. The fourth recess 202 is in a vertical direction, and the gas flows from the bottom surface of the fourth recess 202 to two sides.
In the present structure, it is preferable that the fourth recess 202 is a trapezoid shape, which facilitates a wider flame spreading range.
In the present structure, the outer surface of the base shell 1 is provided with a first recess 104, a second convex surface 105, and a third recess 106. The combination of the first recess 104, the second convex surface 105 and the third recess 106 has a slow flow effect, which improves gas diffusion and is more evenly distributed.
In the present structure, the outer surface of the housing 2 is provided with a fifth recess 205 and a sixth protrusion 206, the gap between the fifth recess 205 and the base case 1 becomes smaller, and the gap between the sixth protrusion 206 and the base shell 1 becomes larger, so that the gas performs a shunting function. The sixth protrusion 206 has a circular shape.
In the present structure, the outer surface of the housing 2 is provided with a seventh recess 207, an eighth recess 208 and a ninth recess 204. In the present structure, the seventh recess 207 and the eighth recess 208 implement flow diverging, so that the gas diverging flow is more uniform and fully combusted. The seventh recess 207 is arranged in an oblique direction, and the seventh recess 207 is provided with an arc, which is beneficial to diverging. Similarly, the ninth recess 204 and the eighth recess 208 are respectively provided with arcs, which is beneficial to diverging.
In the present structure, the upper edge of the base shell 1 is provided with at least two air inlet recesses 107, the depth of the air inlet recess 107 is 3 mm, and one end of the air outlet cavity 201 extends between the air inlet recess 107 and the housing 2 to improve the combustion effect. The part of the air outlet cavity 201 is V-shaped, and the thick flame hole of the combustion part 3 is enlarged by 1 mm to 2 mm, which is beneficial to the formation of a stable thick flame at the upper edge of the base shell 1 and further facilitates the transmission of the thick flame on both sides of the same shell 2 .
The above is only a preferred embodiment of the present disclosure, and is not intended to limit the present disclosure. Any modification, equivalent replacement or improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

A low-nitrogen burner, comprising a base shell (1) including a first air inlet (101), a second air inlet (102) and a vent (103), wherein a housing (2) is disposed on an upper end of the base shell (1), an air outlet cavity (201) is arranged between the housing (2) and the base shell (1), the first air inlet (101), the vent (103) and the air outlet cavity (201) are communicated, an inner cavity of the base shell (1) is communicated with the second air inlet (102), and the base shell (1) is provided with a combustion part (3), and wherein a fire bridge (203) is arranged at a top edge of the housing (2), and the fire bridge (203) extends to an outside of the shell (2).
The low-nitrogen burner according to claim 1, wherein the top edge of the housing (2) is provided with a fourth recess (202), and the fire bridge (203) is arranged in the fourth recess (202).
The low-nitrogen burner according to claim 2, wherein the fire bridge (203) is arranged at an inner bottom surface of the fourth recess (202).
The low-nitrogen burner according to claim 2, wherein the fourth recess (202) has a trapezoidal shape.
The low-nitrogen burner according to claim 1, wherein an outer surface of the housing (2) is provided with a fifth recess (205).
The low-nitrogen burner according to claim 1, wherein an outer surface of the housing (2) is provided with a seventh recess (207).
The low-nitrogen burner according to claim 1, wherein an outer surface of the base shell (1) is provided with a second convex surface (105), and the outer surface of the base shell (1) is provided with a third recess (106).
The low-nitrogen burner according to claim 1, wherein an outer surface of the base shell (1) is provided with a first recess (104), and an outer surface of the housing (2) is provided with a sixth protrusion (206).
The low-nitrogen burner according to claim 1, wherein an outer surface of the housing (2) is provided with an eighth recess (208) and a ninth recess (204).
The low-nitrogen burner according to claim 1, wherein an upper edge of the base shell (1) is provided with at least two air inlet recesses (107), and one end of the air outlet cavity (201) extends between one of the at least two air inlet recesses (107) and the outer shell (2).