Combustor and gas water heater

Abstract

The utility model relates to the technical field of household appliances, and discloses a burner and a gas water heater. The combustor comprises a shell, a secondary air plate and a fire grate, the secondary air plate and the fire grate are arranged in the shell, the shell is provided with a combustion chamber and an air inlet, the secondary air plate is located between the air inlet and the fire grate, the secondary air plate comprises a plate body and a bent part which are connected, and secondary air holes are formed in the plate body and the bent part. A secondary air gathering cavity is formed between the bent part and the shell, and at least part of air of the air inlet enters the combustion chamber through the secondary air gathering cavity. According to the secondary air plate, the secondary air distribution condition of the secondary air plate is optimized, so that the secondary air distribution of the secondary air plate is more uniform, the bending part is closer to a combustion chamber than the plate body, the flowing speed of the secondary air is ensured, sufficient combustion of fuel gas is facilitated, the cooling effect of the wall surface of the combustion chamber is improved, and the service life of the combustion chamber is prolonged. The problems of high carbon monoxide emission, high combustion chamber temperature and the like are solved.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a burner and a gas water heater. Background Technology

[0002] Gas water heaters use gas as fuel. A burner ignites a mixture of gas and air in the combustion chamber, producing high-temperature flue gas. This flue gas then exchanges heat with cold water in a heat exchanger to produce hot water. In partially premixed burners, the gas and required air are pre-mixed; this air is called primary air. The mixture then flows out of the burner orifice. After ignition, some of the gas burns first against the primary air, forming the flame core, also known as the inner cone. The remaining gas mixes with the combustion products and diffuses and re-burns with the surrounding air; this mixed air is called secondary air, and the resulting flame is commonly called the outer cone.

[0003] Existing burners use a planar secondary air plate with a number of small holes. Air is blown out by the fan, reaches the secondary air plate, exits through the holes, participates in combustion, and is then discharged. The area of ​​the secondary air plate is several times larger than the fan's outlet area, resulting in uneven air distribution. This leads to high carbon monoxide emissions and high combustion chamber temperatures. Furthermore, the planar design of the secondary air plate results in weak structural strength and makes it prone to deformation. Utility Model Content

[0004] Based on the above problems, the purpose of this utility model is to provide a burner and a gas water heater that can make the secondary air distribution of the secondary air plate more uniform, which is conducive to the complete combustion of gas.

[0005] To achieve the above objectives, the following technical solution is provided:

[0006] In a first aspect, the present invention provides a burner, including a housing and a secondary air plate and a burner arranged within the housing. The housing is provided with a combustion chamber and an air inlet. The secondary air plate is located between the air inlet and the burner. The secondary air plate includes a plate body and a bent portion connected together. Both the plate body and the bent portion are provided with secondary air holes. A secondary air converging cavity is formed between the bent portion and the housing. At least a portion of the air from the air inlet enters the combustion chamber through the secondary air converging cavity.

[0007] As an optional solution for the burner provided by this utility model, the bending part includes a vent plate and a connecting plate arranged at an angle. The vent plate is connected to the plate body through the connecting plate. The secondary air hole is disposed on the vent plate. The vent plate, the connecting plate and the inner wall of the shell surround the secondary air gathering cavity.

[0008] As an optional solution for the burner provided by this utility model, the vent plate is provided with a first limiting groove, and the connecting plate is provided with a second limiting groove. The first limiting groove and the second limiting groove are connected to avoid the limiting plate of the fire row.

[0009] As an optional solution for the burner provided by this utility model, the bending portion further includes a mounting plate connected to the vent plate, the mounting plate abutting against the inner wall of the housing, and the mounting plate and the connecting plate being located on opposite sides of the vent plate.

[0010] As an optional solution for the burner provided by this utility model, the plate body is provided with a guide surface, and at least part of the air in the air inlet flows to the secondary air gathering cavity through the guide surface.

[0011] As an optional solution for the burner provided by this utility model, the secondary air plate also includes a clearance portion connected to the plate body. The clearance portion and the bending portion are located on opposite sides of the plate body, and a primary air gathering cavity is formed between the clearance portion and the housing. The burner is provided with an air intake channel, and the air intake channel connects the combustion chamber and the primary air gathering cavity.

[0012] As an optional solution for the burner provided by this utility model, the clearance part is provided with a clearance hole, and at least part of the air in the air inlet enters the air intake channel through the primary air gathering chamber and the clearance hole.

[0013] As an optional solution for the burner provided by this utility model, the burner further includes a primary air plate connected to the clearance portion. The primary air plate is provided with a primary air hole, and at least a portion of the air from the air inlet enters the air intake channel through the primary air gathering chamber, the primary air hole, and the clearance hole.

[0014] As an optional solution for the burner provided by this utility model, the secondary air plate further includes a mounting part connected to the clearance part, and the burner is engaged with the mounting part.

[0015] Secondly, this utility model also provides a gas water heater, including a fan, a water tank and the aforementioned burner, wherein the fan is disposed below the burner and the water tank is disposed above the burner.

[0016] The beneficial effects of this utility model are as follows:

[0017] The burner and gas water heater provided by this utility model have a fan blowing air into the casing through the air inlet. A portion of the air from the air inlet enters the combustion chamber through the secondary air holes of the secondary air plate body. Since a secondary air gathering cavity is formed between the bent part of the secondary air plate and the casing, at least part of the air from the air inlet enters the combustion chamber through the secondary air gathering cavity and the secondary air holes of the bent part under the air gathering effect of the secondary air gathering cavity. This optimizes the secondary air distribution of the secondary air plate, making the secondary air distribution of the secondary air plate more uniform. The bent part is closer to the combustion chamber than the plate body, ensuring the flow speed of the secondary air, which is conducive to the complete combustion of gas and improves the cooling effect of the combustion chamber wall. It solves the problems of high carbon monoxide emissions and high combustion chamber temperature. The design of the bent part makes the secondary air plate more structurally strong, less prone to deformation under air pressure, and has a long service life. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of a gas water heater including a burner, provided by a specific embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the burner provided in a specific embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional schematic diagram of the burner provided in a specific embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the burner (with multiple burners hidden and only one burner remaining) provided in a specific embodiment of the present invention from a certain perspective.

[0023] Figure 5 This is a structural schematic diagram of the burner (with multiple burners hidden and only one burner remaining) provided in a specific embodiment of this utility model from another perspective;

[0024] Figure 6 This is a schematic diagram of the structure of the secondary air plate provided in a specific embodiment of this utility model.

[0025] In the picture:

[0026] 1. Housing; 2. Secondary air baffle; 3. Fire vent; 4. Primary air baffle; 5. Mounting bracket;

[0027] 11. Combustion chamber; 12. Air inlet;

[0028] 21. Panel body; 22. Bending section; 23. Secondary air hole; 24. Secondary air gathering cavity; 25. Clearance section; 26. Primary air gathering cavity; 27. Mounting section; 28. Mounting flange;

[0029] 221. Ventilation plate; 2211. First limiting groove; 222. Connecting plate; 2221. Second limiting groove; 223. Mounting plate;

[0030] 251. Clearance hole;

[0031] 31. Limiting plate; 32. Air intake channel;

[0032] 41. Primary air vent;

[0033] 100. Fan. Detailed Implementation

[0034] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] like Figures 1 to 6 As shown, this embodiment provides a burner that can be used in a gas water heater. The burner includes a housing 1 and a secondary air plate 2 and a burner 3 disposed within the housing 1, with multiple burners 3 disposed thereon. The housing 1 is provided with a combustion chamber 11 and an air inlet 12. The combustion chamber 11 provides space for combustion, and the air inlet 12 is used to communicate with the air outlet of a fan 100, which provides air for the combustion of the burner. The air inlet 12 can be circular, rectangular, etc., and is not limited here. The secondary air plate 2 is located between the air inlet 12 and the burner 3. The secondary air plate 2 includes a plate body 21 and a bent portion 22 connected to each other. Both the plate body 21 and the bent portion 22 are provided with secondary air holes 23. A secondary air converging cavity 24 is formed between the bent portion 22 and the housing 1, and at least a portion of the air from the air inlet 12 enters the combustion chamber 11 through the secondary air converging cavity 24.

[0038] The blower 100 blows air into the housing 1 through the air inlet 12. A portion of the air from the air inlet 12 enters the combustion chamber 11 through the secondary air holes 23 of the secondary air plate 2, directly facing the plate body 21. Since a secondary air converging cavity 24 is formed between the bent portion 22 of the secondary air plate 2 and the housing 1, at least a portion of the air from the air inlet 12 enters the combustion chamber 11 through the secondary air converging cavity 24 and the secondary air holes 23 of the bent portion 22, optimizing the secondary air distribution of the secondary air plate 2 and making the secondary air distribution more uniform. The bent portion 22 is closer to the combustion chamber 11 than the plate body 21, ensuring the flow speed of the secondary air, which is beneficial to the complete combustion of the fuel gas, improves the cooling effect of the combustion chamber 11 wall, and solves problems such as high carbon monoxide emissions and high combustion chamber 11 temperature. The design of the bent portion 22 makes the secondary air plate 2 structurally stronger, less prone to deformation under air pressure, and has a longer service life.

[0039] Optionally, the bent portion 22 includes a vent plate 221 and a connecting plate 222 arranged at an angle. The vent plate 221 is connected to the plate body 21 through the connecting plate 222. A secondary air hole 23 is provided on the vent plate 221. The vent plate 221, the connecting plate 222, and the inner wall of the housing 1 form a secondary air converging cavity 24. Both the vent plate 221 and the connecting plate 222 can be rectangular. The vent plate 221 and the connecting plate 222 can be at a 90-degree angle. The vent plate 221 is arranged in a horizontal direction, and the connecting plate 222 is arranged in a vertical direction. The vent plate 221 is closer to the combustion chamber 11 than the plate body 21, ensuring uniform distribution of secondary air.

[0040] Because the design of the bending section 22 causes partial structural interference with the burner 3, to facilitate the limiting and avoidance of the burner 3, optionally, the vent plate 221 is provided with a first limiting groove 2211, and the connecting plate 222 is provided with a second limiting groove 2221. The first limiting groove 2211 and the second limiting groove 2221 are connected to avoid the limiting plate 31 of the burner 3. Multiple first limiting grooves 2211 and multiple second limiting grooves 2221 are provided, depending on the number of burners 3.

[0041] To facilitate the fixing of the secondary air panel 2, the bent portion 22 may optionally include a mounting plate 223 connected to the vent plate 221. The mounting plate 223 abuts against the inner wall of the housing 1, and the mounting plate 223 and the connecting plate 222 are located on opposite sides of the vent plate 221. The mounting plate 223 can be snapped onto the housing 1 or connected by bolts. To enhance the connection strength between the mounting plate 223 and the vent plate 221, reinforcing ribs may be provided between the mounting plate 223 and the vent plate 221. The secondary air panel 2 has multiple mounting flanges 28 on its side to facilitate the fixing of the secondary air panel 2 and the housing 1.

[0042] To guide the air from the air inlet 12 toward the secondary air converging cavity 24, the plate body 21 may optionally be provided with a guide surface, through which at least a portion of the air from the air inlet 12 flows toward the secondary air converging cavity 24. The guide surface may be an arc surface or an inclined surface, and is not limited here.

[0043] To facilitate the entry of primary air into the burner 3, the secondary air plate 2 may optionally include a clearance portion 25 connected to the plate body 21. The clearance portion 25 and the bending portion 22 are located on opposite sides of the plate body 21, and a primary air converging cavity 26 is formed between the clearance portion 25 and the housing 1. The burner 3 is provided with an air intake channel 32, which connects the combustion chamber 11 and the primary air converging cavity 26. The clearance portion 25 may include a vertical plate and a horizontal plate, with one side of the vertical plate connected to the plate body 21 and the other side of the vertical plate connected to the horizontal plate.

[0044] In some embodiments, the clearance section 25 is provided with clearance holes 251, through which at least a portion of the air from the air inlet 12 enters the air intake passage 32 via the primary air gathering chamber 26 and the clearance holes 251. Multiple clearance holes 251 are provided, depending on the number of burners 3. The clearance holes 251 can be oblong or square, and are not limited thereto.

[0045] Optionally, the burner also includes a primary air plate 4 connected to the clearance portion 25. The primary air plate 4 is provided with a primary air hole 41, through which at least a portion of the air from the air inlet 12 enters the air intake passage 32 via the primary air gathering chamber 26, the primary air hole 41, and the clearance hole 251. The primary air plate 4 is attached to the vertical plate of the clearance portion 25, and the horizontal plate of the clearance portion 25 is located above the primary air gathering chamber 26. The primary air plate 4 and the secondary air plate 2 can be attached together, thus eliminating the need for an airflow passage between them and simplifying the structure. Of course, there can also be a gap between the primary air plate 4 and the secondary air plate 2, with airflow connected through a passage.

[0046] In some embodiments, the secondary air plate 2 further includes a mounting portion 27 connected to the clearance portion 25, and the burner 3 is engaged with the mounting portion 27. The mounting portion 27 is provided with a slot, and the edge of the burner 3 is engaged in the slot. The burner also includes a mounting bracket 5, which is engaged with one side of the burner 3, and the other side of the burner 3 is engaged with the mounting portion 27 of the secondary air plate 2, thereby fixing the burner 3 in place.

[0047] This embodiment also provides a gas water heater, including a fan 100, a water tank and the aforementioned burner. The fan 100 is located below the burner and the water tank is located above the burner. The fan 100 provides air for the combustion of the burner. The high-temperature flue gas generated by the combustion of the burner's burner 3 exchanges heat with the water tank, thereby heating the water in the water tank. The blower 100 blows air into the housing 1 through the air inlet 12. A portion of the air from the air inlet 12 enters the combustion chamber 11 through the secondary air holes 23 of the secondary air plate 2 via the plate body 21. Since a secondary air converging cavity 24 is formed between the bent portion 22 of the secondary air plate 2 and the housing 1, at least a portion of the air from the air inlet 12 enters the combustion chamber 11 through the secondary air converging cavity 24 and the secondary air holes 23 of the bent portion 22 under the air gathering effect of the secondary air converging cavity 24. This optimizes the secondary air distribution of the secondary air plate 2, making the secondary air distribution of the secondary air plate 2 more uniform. The bent portion 22 is closer to the combustion chamber 11 than the plate body 21, ensuring the flow speed of the secondary air, which is conducive to the complete combustion of the gas and improves the cooling effect of the combustion chamber 11 wall. This solves the problems of high carbon monoxide emissions and high combustion chamber 11 temperature. The design of the bent portion 22 makes the secondary air plate 2 structurally stronger, less prone to deformation under air pressure, and has a long service life.

[0048] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A burner, comprising a housing (1) and a secondary air plate (2) and a burner vent (3) disposed within the housing (1), wherein the housing (1) is provided with a combustion chamber (11) and an air inlet (12), and the secondary air plate (2) is located between the air inlet (12) and the burner vent (3), characterized in that: The secondary air plate (2) includes a plate body (21) and a bent portion (22) connected to each other. The plate body (21) and the bent portion (22) are both provided with secondary air holes (23). A secondary air gathering cavity (24) is formed between the bent portion (22) and the housing (1). At least part of the air in the air inlet (12) enters the combustion chamber (11) through the secondary air gathering cavity (24). The air inlet (12) is circular or rectangular.

2. The burner according to claim 1, characterized in that, The bending portion (22) includes a vent plate (221) and a connecting plate (222) arranged at an angle. The vent plate (221) is connected to the plate body (21) through the connecting plate (222). The secondary air hole (23) is provided on the vent plate (221). The vent plate (221), the connecting plate (222), and the inner wall of the shell (1) surround the secondary air gathering cavity (24).

3. The burner according to claim 2, characterized in that, The vent plate (221) is provided with a first limiting groove (2211), and the connecting plate (222) is provided with a second limiting groove (2221). The first limiting groove (2211) and the second limiting groove (2221) are connected to avoid the limiting plate (31) of the fire bar (3).

4. The burner according to claim 2, characterized in that, The bending portion (22) also includes a mounting plate (223) connected to the vent plate (221). The mounting plate (223) is attached to the inner wall of the housing (1). The mounting plate (223) and the connecting plate (222) are located on opposite sides of the vent plate (221).

5. The burner according to claim 1, characterized in that, The plate body (21) is provided with a guide surface, and at least part of the air in the air inlet (12) flows to the secondary air gathering cavity (24) via the guide surface.

6. The burner according to claim 1, characterized in that, The secondary air plate (2) also includes a clearance part (25) connected to the plate body (21). The clearance part (25) and the bending part (22) are located on opposite sides of the plate body (21). A primary air gathering cavity (26) is formed between the clearance part (25) and the housing (1). The burner (3) is provided with an air intake channel (32), which connects the combustion chamber (11) and the primary air gathering cavity (26).

7. The burner according to claim 6, characterized in that, The clearance section (25) is provided with a clearance hole (251), and at least part of the air from the air inlet (12) enters the air intake channel (32) through the primary air gathering chamber (26) and the clearance hole (251).

8. The burner according to claim 7, characterized in that, The burner also includes a primary air plate (4) connected to the clearance part (25), the primary air plate (4) is provided with a primary air hole (41), and at least part of the air from the air inlet (12) enters the air intake channel (32) through the primary air gathering chamber (26), the primary air hole (41) and the clearance hole (251).

9. The burner according to claim 6, characterized in that, The secondary air plate (2) also includes a mounting part (27) connected to the clearance part (25), and the fire duct (3) is engaged with the mounting part (27).

10. A gas-fired water heater, characterized in that, It includes a fan (100), a water tank, and a burner as described in any one of claims 1-9, wherein the fan (100) is disposed below the burner and the water tank is disposed above the burner.

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